/* roulang page: index */
:root {
            --kai-primary: #0E141A;
            --kai-primary-soft: #1A232C;
            --kai-surface: #F4F0E8;
            --kai-surface-bright: #FBF9F5;
            --kai-accent: #00C2A8;
            --kai-accent-deep: #009A86;
            --kai-alert: #FF5C35;
            --kai-text: #1C252E;
            --kai-text-light: #4A5560;
            --kai-text-muted: #7A8791;
            --kai-border: #D9D2C5;
            --kai-border-light: #E8E2D7;
            --kai-radius: 12px;
            --kai-radius-sm: 8px;
            --kai-radius-lg: 20px;
            --kai-shadow: 0 8px 24px rgba(14, 20, 26, 0.12);
            --kai-shadow-hover: 0 16px 40px rgba(14, 20, 26, 0.22);
            --kai-transition: all 0.25s ease;
            --kai-max-width: 1200px;
            --kai-section-padding: 88px 0;
            --kai-font-stack: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK SC', 'Inter', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--kai-font-stack);
            font-size: 16px;
            line-height: 1.8;
            color: var(--kai-text);
            background-color: var(--kai-surface);
            padding-bottom: 64px;
            position: relative;
            min-height: 100vh;
        }

        a {
            color: var(--kai-accent-deep);
            text-decoration: none;
            transition: var(--kai-transition);
        }

        a:hover {
            color: var(--kai-accent);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input {
            font-family: inherit;
        }

        button:focus,
        a:focus,
        input:focus {
            outline: 3px solid rgba(0, 194, 168, 0.35);
            outline-offset: 2px;
        }

        .kai-container {
            max-width: var(--kai-max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        .kai-section {
            padding: var(--kai-section-padding);
            position: relative;
        }

        .kai-section-alt {
            background-color: var(--kai-surface-bright);
        }

        .kai-section-dark {
            background-color: var(--kai-primary);
            color: #E8E4DB;
        }

        .kai-section-dark .kai-section-title {
            color: #FFFFFF;
        }

        .kai-section-dark .kai-section-desc {
            color: #AAB5BC;
        }

        .kai-section-title {
            font-size: 2.1rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: var(--kai-text);
            margin-bottom: 12px;
            line-height: 1.3;
        }

        .kai-section-desc {
            font-size: 1.05rem;
            color: var(--kai-text-light);
            max-width: 720px;
            line-height: 1.8;
            margin-bottom: 32px;
        }

        .kai-section-tag {
            display: inline-block;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--kai-alert);
            background: rgba(255, 92, 53, 0.08);
            padding: 4px 14px;
            border-radius: 999px;
            margin-bottom: 16px;
            letter-spacing: 0.03em;
        }

        .kai-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 999px;
            font-weight: 600;
            font-size: 1rem;
            border: none;
            cursor: pointer;
            transition: var(--kai-transition);
            text-align: center;
            justify-content: center;
        }

        .kai-btn-primary {
            background-color: var(--kai-accent);
            color: #0E141A;
        }

        .kai-btn-primary:hover {
            background-color: var(--kai-accent-deep);
            color: #FFFFFF;
            box-shadow: 0 10px 30px rgba(0, 194, 168, 0.35);
            transform: translateY(-2px);
        }

        .kai-btn-outline-light {
            background: transparent;
            color: #FFFFFF;
            border: 2px solid rgba(244, 240, 232, 0.7);
        }

        .kai-btn-outline-light:hover {
            background: rgba(244, 240, 232, 0.15);
            border-color: #FFFFFF;
            color: #FFFFFF;
            transform: translateY(-2px);
        }

        .kai-btn-outline-dark {
            background: transparent;
            color: var(--kai-primary);
            border: 2px solid var(--kai-primary);
        }

        .kai-btn-outline-dark:hover {
            background: var(--kai-primary);
            color: #FFFFFF;
            transform: translateY(-2px);
        }

        .kai-btn-sm {
            padding: 10px 22px;
            font-size: 0.9rem;
        }

        /* Header / Navigation */
        .kai-header {
            background-color: rgba(244, 240, 232, 0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--kai-border-light);
            position: sticky;
            top: 0;
            z-index: 1040;
            transition: var(--kai-transition);
        }

        .kai-header.scrolled {
            box-shadow: 0 4px 20px rgba(14, 20, 26, 0.08);
        }

        .kai-nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            gap: 24px;
        }

        .kai-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.4rem;
            color: var(--kai-primary);
            letter-spacing: -0.01em;
        }

        .kai-logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: var(--kai-primary);
            color: var(--kai-accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
        }

        .kai-nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .kai-nav-links li a {
            color: var(--kai-text);
            font-weight: 500;
            font-size: 0.98rem;
            padding: 6px 2px;
            position: relative;
            letter-spacing: 0.01em;
        }

        .kai-nav-links li a::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 0;
            height: 2px;
            background: var(--kai-accent);
            transition: var(--kai-transition);
        }

        .kai-nav-links li a:hover::after,
        .kai-nav-links li a.active::after {
            width: 100%;
        }

        .kai-nav-links li a.active {
            color: var(--kai-accent-deep);
        }

        .kai-nav-cta {
            margin-left: 8px;
        }

        .kai-hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.6rem;
            color: var(--kai-primary);
            cursor: pointer;
            padding: 4px;
        }

        .kai-mobile-menu {
            display: none;
            background: var(--kai-surface-bright);
            border-bottom: 1px solid var(--kai-border-light);
            padding: 16px 24px 24px;
            animation: kaiSlideDown 0.3s ease;
        }

        .kai-mobile-menu.open {
            display: block;
        }

        @keyframes kaiSlideDown {
            from {
                opacity: 0;
                transform: translateY(-10px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .kai-mobile-menu ul {
            list-style: none;
            padding: 0;
            margin: 0 0 16px;
        }

        .kai-mobile-menu ul li {
            padding: 12px 0;
            border-bottom: 1px solid var(--kai-border-light);
        }

        .kai-mobile-menu ul li a {
            font-size: 1.05rem;
            font-weight: 500;
            color: var(--kai-text);
        }

        /* Hero */
        .kai-hero {
            min-height: 85vh;
            display: flex;
            align-items: center;
            position: relative;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            color: #FFFFFF;
            overflow: hidden;
        }

        .kai-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(14, 20, 26, 0.92) 0%, rgba(14, 20, 26, 0.62) 45%, rgba(0, 194, 168, 0.25) 100%);
            pointer-events: none;
        }

        .kai-hero-inner {
            position: relative;
            z-index: 2;
            padding: 80px 0;
            width: 100%;
        }

        .kai-hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(0, 194, 168, 0.18);
            border: 1px solid rgba(0, 194, 168, 0.4);
            padding: 8px 18px;
            border-radius: 999px;
            font-size: 0.9rem;
            font-weight: 600;
            margin-bottom: 24px;
            color: #C8F5EF;
        }

        .kai-hero-badge .countdown {
            font-variant-numeric: tabular-nums;
            color: #FFFFFF;
            font-weight: 700;
            letter-spacing: 0.04em;
        }

        .kai-hero h1 {
            font-size: 3.4rem;
            font-weight: 700;
            letter-spacing: -0.03em;
            line-height: 1.2;
            margin-bottom: 20px;
            max-width: 720px;
        }

        .kai-hero h1 .flash-word {
            color: var(--kai-accent);
            position: relative;
        }

        .kai-hero-sub {
            font-size: 1.15rem;
            line-height: 1.9;
            max-width: 640px;
            margin-bottom: 36px;
            color: rgba(232, 228, 219, 0.88);
        }

        .kai-hero-cta {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        .kai-hero-metrics {
            display: flex;
            gap: 40px;
            margin-top: 48px;
            flex-wrap: wrap;
        }

        .kai-hero-metric {
            display: flex;
            flex-direction: column;
        }

        .kai-hero-metric-number {
            font-size: 1.8rem;
            font-weight: 700;
            color: #FFFFFF;
            letter-spacing: -0.02em;
        }

        .kai-hero-metric-label {
            font-size: 0.88rem;
            color: rgba(232, 228, 219, 0.7);
            margin-top: 2px;
        }

        .kai-hero-flash-card {
            background: rgba(244, 240, 232, 0.06);
            border: 1px solid rgba(244, 240, 232, 0.15);
            backdrop-filter: blur(12px);
            border-radius: var(--kai-radius);
            padding: 28px;
            max-width: 420px;
            position: relative;
            z-index: 2;
        }

        .kai-hero-flash-card h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 8px;
        }

        .kai-hero-flash-card .flash-desc {
            font-size: 0.95rem;
            color: rgba(232, 228, 219, 0.8);
            margin-bottom: 16px;
            line-height: 1.7;
        }

        .kai-hero-flash-card .flash-tag {
            display: inline-block;
            font-size: 0.78rem;
            background: var(--kai-alert);
            color: #FFFFFF;
            padding: 3px 10px;
            border-radius: 4px;
            margin-bottom: 12px;
            font-weight: 600;
        }

        /* Section: Flash Strip */
        .kai-flash-strip {
            background: var(--kai-primary);
            padding: 18px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            position: relative;
            z-index: 2;
        }

        .kai-flash-strip-inner {
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
            justify-content: space-between;
        }

        .kai-flash-strip-text {
            color: #E8E4DB;
            font-size: 1rem;
            font-weight: 500;
        }

        .kai-flash-strip-text .highlight {
            color: var(--kai-accent);
            font-weight: 700;
        }

        /* Benefits / Three sells */
        .kai-benefits-grid {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 40px;
            align-items: start;
        }

        .kai-benefit-item {
            position: relative;
            padding: 32px 30px;
            background: var(--kai-surface-bright);
            border: 1px solid var(--kai-border-light);
            border-radius: var(--kai-radius);
            transition: var(--kai-transition);
        }

        .kai-benefit-item:hover {
            box-shadow: var(--kai-shadow-hover);
            transform: translateY(-4px);
            border-color: rgba(0, 194, 168, 0.3);
        }

        .kai-benefit-number {
            font-size: 3rem;
            font-weight: 700;
            color: var(--kai-accent);
            letter-spacing: -0.04em;
            line-height: 1;
            margin-bottom: 16px;
            opacity: 0.85;
        }

        .kai-benefit-item h3 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--kai-text);
        }

        .kai-benefit-item p {
            font-size: 0.98rem;
            color: var(--kai-text-light);
            line-height: 1.8;
            margin: 0;
        }

        /* Price Ladder */
        .kai-ladder-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            margin-top: 24px;
        }

        .kai-ladder-item {
            background: #1A232C;
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--kai-radius);
            padding: 28px;
            transition: var(--kai-transition);
        }

        .kai-ladder-item:hover {
            border-color: var(--kai-accent);
            transform: translateY(-3px);
        }

        .kai-ladder-item.highlight-item {
            border-color: var(--kai-accent);
            background: #1E2A33;
        }

        .kai-ladder-item h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 6px;
        }

        .kai-ladder-item .ladder-value {
            font-size: 0.85rem;
            color: var(--kai-accent);
            font-weight: 600;
            margin-bottom: 14px;
        }

        .kai-ladder-item ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .kai-ladder-item ul li {
            font-size: 0.9rem;
            color: rgba(232, 228, 219, 0.78);
            padding: 7px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .kai-ladder-item ul li i {
            color: var(--kai-accent);
            font-size: 0.85rem;
        }

        /* Package comparison table */
        .kai-package-table-wrap {
            overflow-x: auto;
            margin-top: 20px;
            background: #FFFFFF;
            border-radius: var(--kai-radius);
            box-shadow: var(--kai-shadow);
            border: 1px solid var(--kai-border-light);
        }

        .kai-package-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.95rem;
            min-width: 720px;
        }

        .kai-package-table thead th {
            background: var(--kai-primary);
            color: #FFFFFF;
            padding: 18px 20px;
            text-align: left;
            font-weight: 600;
            font-size: 0.9rem;
            letter-spacing: 0.02em;
        }

        .kai-package-table tbody td {
            padding: 16px 20px;
            border-bottom: 1px solid var(--kai-border-light);
            color: var(--kai-text-light);
        }

        .kai-package-table tbody tr:last-child td {
            border-bottom: none;
        }

        .kai-package-table tbody tr:hover td {
            background: rgba(0, 194, 168, 0.04);
        }

        .kai-package-table .package-name {
            font-weight: 600;
            color: var(--kai-text);
        }

        .kai-package-table .included {
            color: var(--kai-accent-deep);
            font-weight: 600;
        }

        /* News list */
        .kai-news-layout {
            display: grid;
            grid-template-columns: 1.6fr 1fr;
            gap: 40px;
            align-items: start;
        }

        .kai-news-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .kai-news-list li {
            display: flex;
            gap: 20px;
            padding: 22px 0;
            border-bottom: 1px solid var(--kai-border-light);
            transition: var(--kai-transition);
        }

        .kai-news-list li:hover {
            padding-left: 8px;
        }

        .kai-news-date {
            min-width: 70px;
            text-align: center;
            background: var(--kai-surface);
            border-radius: var(--kai-radius-sm);
            padding: 8px 12px;
            align-self: flex-start;
        }

        .kai-news-date .day {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--kai-primary);
            line-height: 1.2;
        }

        .kai-news-date .month {
            font-size: 0.72rem;
            color: var(--kai-text-muted);
        }

        .kai-news-content h3 {
            font-size: 1.1rem;
            font-weight: 600;
            margin-bottom: 6px;
            line-height: 1.5;
        }

        .kai-news-content p {
            font-size: 0.92rem;
            color: var(--kai-text-light);
            line-height: 1.75;
            margin: 0;
        }

        .kai-news-tag {
            display: inline-block;
            font-size: 0.72rem;
            font-weight: 600;
            padding: 2px 10px;
            border-radius: 4px;
            background: rgba(0, 194, 168, 0.1);
            color: var(--kai-accent-deep);
            margin-right: 8px;
        }

        .kai-news-sidebar {
            background: var(--kai-primary);
            border-radius: var(--kai-radius);
            padding: 28px;
            color: #E8E4DB;
            position: sticky;
            top: 100px;
        }

        .kai-news-sidebar h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 16px;
        }

        .kai-news-sidebar ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .kai-news-sidebar ul li {
            padding: 12px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .kai-news-sidebar ul li:last-child {
            border-bottom: none;
        }

        .kai-news-sidebar ul li a {
            color: #C8D2D8;
            font-size: 0.9rem;
            line-height: 1.6;
            display: block;
        }

        .kai-news-sidebar ul li a:hover {
            color: var(--kai-accent);
        }

        /* Scene demo / alternating */
        .kai-scene-item {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
            padding: 40px 0;
        }

        .kai-scene-item.reverse .kai-scene-image {
            order: 2;
        }

        .kai-scene-item.reverse .kai-scene-text {
            order: 1;
        }

        .kai-scene-image {
            border-radius: var(--kai-radius);
            overflow: hidden;
            box-shadow: var(--kai-shadow);
            aspect-ratio: 4/3;
            background: var(--kai-border-light);
        }

        .kai-scene-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .kai-scene-text h3 {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--kai-text);
        }

        .kai-scene-text p {
            color: var(--kai-text-light);
            line-height: 1.85;
            margin-bottom: 16px;
            font-size: 0.98rem;
        }

        .kai-scene-text ol {
            padding-left: 20px;
            margin: 0;
        }

        .kai-scene-text ol li {
            color: var(--kai-text-light);
            padding: 4px 0;
            font-size: 0.92rem;
        }

        /* Partner tags */
        .kai-partner-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
        }

        .kai-partner-chip {
            background: #1A232C;
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--kai-radius-sm);
            padding: 18px 20px;
            color: #C8D2D8;
            font-size: 0.9rem;
            line-height: 1.6;
            transition: var(--kai-transition);
        }

        .kai-partner-chip:hover {
            border-color: var(--kai-accent);
            background: #1E2A33;
        }

        .kai-partner-chip .partner-name {
            color: #FFFFFF;
            font-weight: 600;
            display: block;
            margin-bottom: 4px;
        }

        /* Testimonials */
        .kai-testimonial-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .kai-testimonial-card {
            background: #FFFFFF;
            border: 1px solid var(--kai-border-light);
            border-radius: var(--kai-radius);
            padding: 28px;
            transition: var(--kai-transition);
        }

        .kai-testimonial-card:hover {
            box-shadow: var(--kai-shadow-hover);
            transform: translateY(-4px);
        }

        .kai-testimonial-card .stars {
            color: var(--kai-alert);
            font-size: 0.95rem;
            margin-bottom: 12px;
            letter-spacing: 2px;
        }

        .kai-testimonial-card p {
            font-size: 0.94rem;
            color: var(--kai-text-light);
            line-height: 1.8;
            margin-bottom: 16px;
        }

        .kai-testimonial-card .author {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .kai-testimonial-card .author-avatar {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: var(--kai-primary);
            color: var(--kai-accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.85rem;
        }

        .kai-testimonial-card .author-name {
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--kai-text);
        }

        .kai-testimonial-card .author-role {
            font-size: 0.78rem;
            color: var(--kai-text-muted);
        }

        /* FAQ */
        .kai-faq-list {
            max-width: 820px;
            margin: 0 auto;
        }

        .kai-faq-item {
            border: 1px solid var(--kai-border-light);
            border-radius: var(--kai-radius-sm);
            margin-bottom: 14px;
            overflow: hidden;
            background: #FFFFFF;
            transition: var(--kai-transition);
        }

        .kai-faq-item:hover {
            border-color: rgba(0, 194, 168, 0.3);
        }

        .kai-faq-question {
            padding: 20px 24px;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--kai-text);
            user-select: none;
            transition: var(--kai-transition);
        }

        .kai-faq-question .faq-icon {
            color: var(--kai-accent-deep);
            font-size: 0.9rem;
            transition: var(--kai-transition);
        }

        .kai-faq-item.open .kai-faq-question .faq-icon {
            transform: rotate(180deg);
        }

        .kai-faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
        }

        .kai-faq-item.open .kai-faq-answer {
            max-height: 360px;
        }

        .kai-faq-answer-inner {
            padding: 0 24px 20px;
            color: var(--kai-text-light);
            font-size: 0.94rem;
            line-height: 1.85;
        }

        /* Bottom fixed CTA */
        .kai-fixed-cta {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            background: var(--kai-primary);
            color: #FFFFFF;
            z-index: 1050;
            padding: 0 24px;
            height: 64px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            box-shadow: 0 -8px 30px rgba(14, 20, 26, 0.25);
        }

        .kai-fixed-cta-text {
            font-size: 0.9rem;
            color: rgba(232, 228, 219, 0.85);
            line-height: 1.4;
            flex: 1;
            min-width: 0;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .kai-fixed-cta-text strong {
            color: var(--kai-accent);
            font-weight: 600;
        }

        /* Brand section */
        .kai-brand-intro {
            padding: 48px 0;
            background: #FFFFFF;
            border-radius: var(--kai-radius);
            box-shadow: var(--kai-shadow);
            border: 1px solid var(--kai-border-light);
        }

        .kai-brand-intro p {
            font-size: 1rem;
            color: var(--kai-text-light);
            line-height: 1.95;
            margin: 0;
        }

        /* Safety system */
        .kai-safety-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .kai-safety-card {
            text-align: center;
            padding: 28px 20px;
            background: rgba(255, 255, 255, 0.04);
            border-radius: var(--kai-radius-sm);
            border: 1px solid rgba(255, 255, 255, 0.06);
            transition: var(--kai-transition);
        }

        .kai-safety-card:hover {
            background: rgba(255, 255, 255, 0.07);
            border-color: rgba(0, 194, 168, 0.3);
        }

        .kai-safety-card i {
            font-size: 1.8rem;
            color: var(--kai-accent);
            margin-bottom: 14px;
        }

        .kai-safety-card h3 {
            font-size: 1rem;
            font-weight: 600;
            color: #FFFFFF;
            margin-bottom: 6px;
        }

        .kai-safety-card p {
            font-size: 0.82rem;
            color: rgba(232, 228, 219, 0.7);
            line-height: 1.6;
            margin: 0;
        }

        /* Entry matrix */
        .kai-entry-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 14px;
        }

        .kai-entry-card {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 18px 20px;
            background: #FFFFFF;
            border: 1px solid var(--kai-border-light);
            border-radius: var(--kai-radius-sm);
            transition: var(--kai-transition);
            cursor: pointer;
        }

        .kai-entry-card:hover {
            box-shadow: var(--kai-shadow);
            transform: translateY(-3px);
            border-color: var(--kai-accent);
        }

        .kai-entry-card i {
            font-size: 1.3rem;
            color: var(--kai-accent-deep);
        }

        .kai-entry-card span {
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--kai-text);
        }

        /* Content calendar */
        .kai-calendar-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .kai-calendar-item {
            display: flex;
            align-items: center;
            gap: 20px;
            padding: 16px 0;
            border-bottom: 1px solid var(--kai-border-light);
        }

        .kai-calendar-item .cal-date {
            min-width: 90px;
            background: rgba(255, 92, 53, 0.08);
            color: var(--kai-alert);
            font-weight: 600;
            font-size: 0.85rem;
            padding: 6px 12px;
            border-radius: var(--kai-radius-sm);
            text-align: center;
        }

        .kai-calendar-item .cal-text {
            flex: 1;
            font-size: 0.92rem;
            color: var(--kai-text-light);
        }

        .kai-calendar-item .cal-status {
            font-size: 0.76rem;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 4px;
            background: rgba(0, 194, 168, 0.1);
            color: var(--kai-accent-deep);
            white-space: nowrap;
        }

        /* Footer */
        .kai-footer {
            background: #0B1015;
            color: #AAB5BC;
            padding: 60px 0 30px;
            margin-bottom: 64px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }

        .kai-footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .kai-footer-brand .kai-logo {
            color: #FFFFFF;
            margin-bottom: 16px;
        }

        .kai-footer-brand p {
            font-size: 0.9rem;
            color: #7A8791;
            line-height: 1.8;
            max-width: 320px;
        }

        .kai-footer h4 {
            color: #FFFFFF;
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 16px;
        }

        .kai-footer ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .kai-footer ul li {
            padding: 6px 0;
        }

        .kai-footer ul li a {
            color: #7A8791;
            font-size: 0.88rem;
            transition: var(--kai-transition);
        }

        .kai-footer ul li a:hover {
            color: var(--kai-accent);
        }

        .kai-footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 24px;
            text-align: center;
            font-size: 0.8rem;
            color: #5A6570;
            line-height: 2;
        }

        .kai-footer-bottom a {
            color: #7A8791;
            margin: 0 6px;
        }

        .kai-footer-bottom a:hover {
            color: var(--kai-accent);
        }

        /* Responsive */
        @media (max-width: 992px) {
            .kai-section {
                padding: 64px 0;
            }
            .kai-hero h1 {
                font-size: 2.6rem;
            }
            .kai-benefits-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .kai-ladder-grid {
                grid-template-columns: 1fr 1fr;
            }
            .kai-news-layout {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .kai-news-sidebar {
                position: static;
            }
            .kai-testimonial-grid {
                grid-template-columns: 1fr 1fr;
            }
            .kai-partner-grid {
                grid-template-columns: 1fr 1fr;
            }
            .kai-safety-grid {
                grid-template-columns: 1fr 1fr;
            }
            .kai-entry-grid {
                grid-template-columns: 1fr 1fr;
            }
            .kai-nav-links {
                display: none;
            }
            .kai-nav-cta {
                display: none;
            }
            .kai-hamburger {
                display: block;
            }
            .kai-scene-item,
            .kai-scene-item.reverse {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .kai-scene-item.reverse .kai-scene-image {
                order: 1;
            }
            .kai-scene-item.reverse .kai-scene-text {
                order: 2;
            }
            .kai-footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
        }

        @media (max-width: 768px) {
            .kai-section {
                padding: 48px 0;
            }
            .kai-container {
                padding: 0 18px;
            }
            .kai-section-title {
                font-size: 1.7rem;
            }
            .kai-hero {
                min-height: 75vh;
            }
            .kai-hero h1 {
                font-size: 2.2rem;
            }
            .kai-hero-sub {
                font-size: 1rem;
            }
            .kai-benefits-grid {
                grid-template-columns: 1fr;
            }
            .kai-ladder-grid {
                grid-template-columns: 1fr;
            }
            .kai-testimonial-grid {
                grid-template-columns: 1fr;
            }
            .kai-partner-grid {
                grid-template-columns: 1fr;
            }
            .kai-safety-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .kai-entry-grid {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .kai-hero-metrics {
                gap: 24px;
                margin-top: 32px;
            }
            .kai-hero-metric-number {
                font-size: 1.4rem;
            }
            .kai-fixed-cta {
                height: 56px;
                padding: 0 16px;
            }
            .kai-fixed-cta-text {
                font-size: 0.78rem;
            }
            .kai-btn {
                padding: 12px 24px;
                font-size: 0.9rem;
            }
            body {
                padding-bottom: 56px;
            }
            .kai-footer {
                margin-bottom: 56px;
                padding: 40px 0 20px;
            }
            .kai-footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .kai-news-date {
                min-width: 56px;
            }
            .kai-news-list li {
                flex-direction: column;
                gap: 10px;
            }
            .kai-news-date {
                align-self: flex-start;
            }
            .kai-hero-flash-card {
                max-width: 100%;
                margin-top: 28px;
            }
        }

        @media (max-width: 576px) {
            .kai-section-title {
                font-size: 1.5rem;
            }
            .kai-hero h1 {
                font-size: 1.9rem;
            }
            .kai-hero {
                min-height: auto;
                padding: 40px 0 60px;
            }
            .kai-hero-inner {
                padding: 32px 0;
            }
            .kai-hero-cta {
                flex-direction: column;
                align-items: stretch;
            }
            .kai-safety-grid {
                grid-template-columns: 1fr;
            }
            .kai-entry-grid {
                grid-template-columns: 1fr;
            }
            .kai-flash-strip-inner {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
            }
        }

/* roulang page: category2 */
:root {
            --kai-primary: #0E141A;
            --kai-primary-soft: #1A232C;
            --kai-surface: #F4F0E8;
            --kai-surface-bright: #FBF9F5;
            --kai-accent: #00C2A8;
            --kai-accent-deep: #009A86;
            --kai-alert: #FF5C35;
            --kai-text: #1C252E;
            --kai-text-light: #4A5560;
            --kai-text-muted: #7A8791;
            --kai-border: #D9D2C5;
            --kai-border-light: #E8E2D7;
            --kai-radius: 12px;
            --kai-radius-sm: 8px;
            --kai-radius-lg: 20px;
            --kai-shadow: 0 8px 24px rgba(14, 20, 26, 0.12);
            --kai-shadow-hover: 0 16px 40px rgba(14, 20, 26, 0.22);
            --kai-transition: all 0.25s ease;
            --kai-max-width: 1200px;
            --kai-section-padding: 88px 0;
            --kai-font-stack: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK SC', 'Inter', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--kai-font-stack);
            font-size: 16px;
            line-height: 1.8;
            color: var(--kai-text);
            background-color: var(--kai-surface);
            padding-bottom: 64px;
            position: relative;
            min-height: 100vh;
            overflow-x: hidden;
        }

        a {
            color: var(--kai-accent-deep);
            text-decoration: none;
            transition: var(--kai-transition);
        }

        a:hover {
            color: var(--kai-accent);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input {
            font-family: inherit;
        }

        button:focus,
        a:focus,
        input:focus {
            outline: 3px solid rgba(0, 194, 168, 0.35);
            outline-offset: 2px;
        }

        .kai-container {
            max-width: var(--kai-max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        .kai-section {
            padding: var(--kai-section-padding);
            position: relative;
        }

        .kai-section-alt {
            background-color: var(--kai-surface-bright);
        }

        .kai-section-dark {
            background-color: var(--kai-primary);
            color: #E8E4DB;
        }

        .kai-section-dark .kai-section-title {
            color: #FFFFFF;
        }

        .kai-section-dark .kai-section-desc {
            color: #AAB5BC;
        }

        .kai-section-tight {
            padding: 56px 0;
        }

        .kai-section-title {
            font-size: 2.1rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: var(--kai-text);
            margin-bottom: 12px;
            line-height: 1.3;
        }

        .kai-section-desc {
            font-size: 1.05rem;
            color: var(--kai-text-light);
            max-width: 720px;
            line-height: 1.8;
            margin-bottom: 32px;
        }

        .kai-section-tag {
            display: inline-block;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--kai-alert);
            background: rgba(255, 92, 53, 0.08);
            padding: 4px 14px;
            border-radius: 999px;
            margin-bottom: 16px;
            letter-spacing: 0.03em;
        }

        .kai-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 999px;
            font-weight: 600;
            font-size: 1rem;
            border: none;
            cursor: pointer;
            transition: var(--kai-transition);
            text-align: center;
            justify-content: center;
            white-space: nowrap;
        }

        .kai-btn-primary {
            background-color: var(--kai-accent);
            color: #0E141A;
        }

        .kai-btn-primary:hover {
            background-color: var(--kai-accent-deep);
            color: #FFFFFF;
            box-shadow: 0 10px 30px rgba(0, 194, 168, 0.35);
            transform: translateY(-2px);
        }

        .kai-btn-outline-light {
            background: transparent;
            color: #FFFFFF;
            border: 2px solid rgba(244, 240, 232, 0.7);
        }

        .kai-btn-outline-light:hover {
            background: rgba(244, 240, 232, 0.15);
            border-color: #FFFFFF;
            color: #FFFFFF;
            transform: translateY(-2px);
        }

        .kai-btn-outline-dark {
            background: transparent;
            color: var(--kai-primary);
            border: 2px solid var(--kai-primary);
        }

        .kai-btn-outline-dark:hover {
            background: var(--kai-primary);
            color: #FFFFFF;
            transform: translateY(-2px);
        }

        .kai-btn-sm {
            padding: 10px 22px;
            font-size: 0.9rem;
        }

        .kai-btn-lg {
            padding: 18px 42px;
            font-size: 1.1rem;
        }

        .kai-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.78rem;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 999px;
            letter-spacing: 0.02em;
            background-color: var(--kai-primary);
            color: #FFFFFF;
        }

        .kai-badge-accent {
            background-color: var(--kai-accent);
            color: #0E141A;
        }

        .kai-badge-alert {
            background-color: var(--kai-alert);
            color: #FFFFFF;
        }

        .kai-badge-soft {
            background-color: rgba(0, 194, 168, 0.12);
            color: var(--kai-accent-deep);
        }

        .kai-card {
            background: #FFFFFF;
            border-radius: var(--kai-radius);
            box-shadow: var(--kai-shadow);
            overflow: hidden;
            transition: var(--kai-transition);
            border: 1px solid var(--kai-border-light);
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .kai-card:hover {
            box-shadow: var(--kai-shadow-hover);
            transform: translateY(-4px);
            border-color: rgba(0, 194, 168, 0.3);
        }

        .kai-card-img {
            height: 200px;
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            position: relative;
            border-radius: var(--kai-radius) var(--kai-radius) 0 0;
            overflow: hidden;
            flex-shrink: 0;
        }

        .kai-card-img-sm {
            height: 160px;
        }

        .kai-card-img-lg {
            height: 320px;
        }

        .kai-card-img::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 0%, rgba(14, 20, 26, 0.45) 100%);
            pointer-events: none;
        }

        .kai-card-body {
            padding: 22px 24px 24px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .kai-card-title {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--kai-text);
            margin-bottom: 8px;
            line-height: 1.4;
            letter-spacing: -0.01em;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .kai-card-text {
            font-size: 0.92rem;
            color: var(--kai-text-light);
            line-height: 1.75;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 12px;
        }

        .kai-card-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            font-size: 0.82rem;
            color: var(--kai-text-muted);
            margin-top: auto;
            padding-top: 12px;
            border-top: 1px solid var(--kai-border-light);
        }

        .kai-card-meta span {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .kai-card-tag {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--kai-accent-deep);
            background: rgba(0, 194, 168, 0.1);
            padding: 3px 10px;
            border-radius: 999px;
            margin-bottom: 10px;
        }

        /* Header */
        .kai-header {
            background-color: rgba(244, 240, 232, 0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--kai-border-light);
            position: sticky;
            top: 0;
            z-index: 1040;
            transition: var(--kai-transition);
        }

        .kai-header.scrolled {
            box-shadow: 0 4px 20px rgba(14, 20, 26, 0.08);
        }

        .kai-nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            gap: 24px;
            flex-wrap: nowrap;
        }

        .kai-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.4rem;
            color: var(--kai-primary);
            letter-spacing: -0.01em;
            white-space: nowrap;
        }

        .kai-logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: var(--kai-primary);
            color: var(--kai-accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.15rem;
            flex-shrink: 0;
        }

        .kai-nav-links {
            display: flex;
            align-items: center;
            gap: 20px;
            list-style: none;
            margin: 0;
            padding: 0;
            flex-wrap: nowrap;
        }

        .kai-nav-links a {
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--kai-text-light);
            position: relative;
            padding: 4px 0;
            white-space: nowrap;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: var(--kai-transition);
        }

        .kai-nav-links a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--kai-accent);
            transition: var(--kai-transition);
            border-radius: 2px;
        }

        .kai-nav-links a:hover {
            color: var(--kai-primary);
        }

        .kai-nav-links a:hover::after {
            width: 100%;
        }

        .kai-nav-links a.active {
            color: var(--kai-accent-deep);
            font-weight: 700;
        }

        .kai-nav-links a.active::after {
            width: 100%;
        }

        .kai-nav-cta {
            white-space: nowrap;
            flex-shrink: 0;
        }

        .kai-hamburger {
            display: none;
            background: none;
            border: 1px solid var(--kai-border);
            border-radius: 8px;
            width: 42px;
            height: 42px;
            font-size: 1.2rem;
            color: var(--kai-primary);
            cursor: pointer;
            transition: var(--kai-transition);
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .kai-hamburger:hover {
            background: var(--kai-primary);
            color: var(--kai-accent);
            border-color: var(--kai-primary);
        }

        .kai-mobile-menu {
            display: none;
            background: var(--kai-surface-bright);
            border-bottom: 1px solid var(--kai-border-light);
            padding: 16px 24px 24px;
            box-shadow: 0 8px 24px rgba(14, 20, 26, 0.1);
        }

        .kai-mobile-menu.show {
            display: block;
        }

        .kai-mobile-menu ul {
            list-style: none;
            padding: 0;
            margin: 0 0 16px;
        }

        .kai-mobile-menu li {
            border-bottom: 1px solid var(--kai-border-light);
        }

        .kai-mobile-menu li:last-child {
            border-bottom: none;
        }

        .kai-mobile-menu a {
            display: block;
            padding: 12px 0;
            font-size: 1rem;
            font-weight: 500;
            color: var(--kai-text);
            transition: var(--kai-transition);
        }

        .kai-mobile-menu a:hover {
            color: var(--kai-accent-deep);
            padding-left: 8px;
        }

        .kai-mobile-menu a.active {
            color: var(--kai-accent-deep);
            font-weight: 700;
        }

        /* Category Hero */
        .kai-cat-hero {
            padding: 64px 0 48px;
            background: var(--kai-primary);
            color: #FFFFFF;
            position: relative;
            overflow: hidden;
        }

        .kai-cat-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
            opacity: 0.25;
            pointer-events: none;
        }

        .kai-cat-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(14, 20, 26, 0.92) 0%, rgba(14, 20, 26, 0.6) 50%, rgba(0, 194, 168, 0.15) 100%);
            pointer-events: none;
        }

        .kai-cat-hero > .kai-container {
            position: relative;
            z-index: 1;
        }

        .kai-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 24px;
            flex-wrap: wrap;
        }

        .kai-breadcrumb a {
            color: rgba(255, 255, 255, 0.7);
            transition: var(--kai-transition);
        }

        .kai-breadcrumb a:hover {
            color: var(--kai-accent);
        }

        .kai-breadcrumb .separator {
            color: rgba(255, 255, 255, 0.4);
        }

        .kai-cat-hero h1 {
            font-size: 2.8rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            margin-bottom: 16px;
            line-height: 1.25;
        }

        .kai-cat-hero .kai-cat-desc {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.8);
            max-width: 680px;
            line-height: 1.8;
            margin-bottom: 28px;
        }

        .kai-cat-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }

        /* Filter bar */
        .kai-filter-bar {
            background: #FFFFFF;
            border: 1px solid var(--kai-border-light);
            border-radius: var(--kai-radius);
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            box-shadow: 0 4px 16px rgba(14, 20, 26, 0.05);
            margin-top: -28px;
            position: relative;
            z-index: 2;
        }

        .kai-filter-tags {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
            align-items: center;
        }

        .kai-filter-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--kai-text-light);
            background: var(--kai-surface);
            border: 1px solid var(--kai-border);
            border-radius: 999px;
            padding: 6px 16px;
            cursor: pointer;
            transition: var(--kai-transition);
            white-space: nowrap;
        }

        .kai-filter-tag:hover {
            border-color: var(--kai-accent);
            color: var(--kai-accent-deep);
            background: rgba(0, 194, 168, 0.06);
        }

        .kai-filter-tag.active {
            background: var(--kai-accent);
            color: #0E141A;
            border-color: var(--kai-accent);
            font-weight: 600;
        }

        .kai-filter-sort {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--kai-text-muted);
            white-space: nowrap;
        }

        .kai-filter-sort select {
            border: 1px solid var(--kai-border);
            border-radius: 8px;
            padding: 6px 12px;
            font-size: 0.85rem;
            font-family: inherit;
            color: var(--kai-text);
            background: var(--kai-surface-bright);
            cursor: pointer;
            min-width: 110px;
        }

        /* Cards grid */
        .kai-cards-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .kai-cards-grid .card-wide {
            grid-column: span 2;
        }

        .kai-cards-grid .card-full {
            grid-column: span 3;
        }

        .kai-card-horizontal {
            display: flex;
            flex-direction: row;
            align-items: stretch;
            height: 100%;
        }

        .kai-card-horizontal .kai-card-img {
            width: 180px;
            height: auto;
            min-height: 140px;
            border-radius: var(--kai-radius) 0 0 var(--kai-radius);
            flex-shrink: 0;
        }

        .kai-card-horizontal .kai-card-img::after {
            background: linear-gradient(90deg, transparent 0%, rgba(14, 20, 26, 0.35) 100%);
        }

        .kai-card-horizontal .kai-card-body {
            flex: 1;
            padding: 18px 20px;
            justify-content: center;
        }

        .kai-card-horizontal .kai-card-title {
            font-size: 1rem;
            -webkit-line-clamp: 2;
        }

        .kai-card-horizontal .kai-card-text {
            -webkit-line-clamp: 2;
            font-size: 0.85rem;
        }

        .kai-card-spotlight {
            background: var(--kai-primary);
            color: #E8E4DB;
            border-color: var(--kai-primary);
        }

        .kai-card-spotlight:hover {
            border-color: var(--kai-accent);
        }

        .kai-card-spotlight .kai-card-title {
            color: #FFFFFF;
        }

        .kai-card-spotlight .kai-card-text {
            color: #AAB5BC;
        }

        .kai-card-spotlight .kai-card-meta {
            color: #7A8791;
            border-top-color: rgba(244, 240, 232, 0.15);
        }

        .kai-card-spotlight .kai-card-tag {
            color: var(--kai-accent);
            background: rgba(0, 194, 168, 0.15);
        }

        /* Number badge for cards */
        .kai-card-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            border-radius: 8px;
            background: var(--kai-primary);
            color: #FFFFFF;
            font-size: 0.85rem;
            font-weight: 700;
            margin-right: 8px;
            flex-shrink: 0;
        }

        /* Highlight feature section */
        .kai-feature-panel {
            background: #FFFFFF;
            border-radius: var(--kai-radius-lg);
            overflow: hidden;
            box-shadow: var(--kai-shadow);
            border: 1px solid var(--kai-border-light);
            display: flex;
            flex-direction: column;
            height: 100%;
        }

        .kai-feature-panel-img {
            height: 240px;
            background-size: cover;
            background-position: center;
            position: relative;
        }

        .kai-feature-panel-img::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 0%, rgba(14, 20, 26, 0.5) 100%);
        }

        .kai-feature-panel-body {
            padding: 28px 30px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .kai-feature-panel-body h3 {
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 10px;
            letter-spacing: -0.01em;
        }

        .kai-feature-panel-body p {
            color: var(--kai-text-light);
            font-size: 0.95rem;
            margin-bottom: 16px;
            line-height: 1.75;
        }

        /* Stats */
        .kai-stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .kai-stat-item {
            text-align: center;
            padding: 28px 20px;
            background: rgba(255, 255, 255, 0.05);
            border-radius: var(--kai-radius);
            border: 1px solid rgba(244, 240, 232, 0.12);
            transition: var(--kai-transition);
        }

        .kai-stat-item:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(0, 194, 168, 0.4);
            transform: translateY(-3px);
        }

        .kai-stat-num {
            font-size: 2.4rem;
            font-weight: 700;
            color: var(--kai-accent);
            letter-spacing: -0.02em;
            line-height: 1.2;
            margin-bottom: 4px;
        }

        .kai-stat-label {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.7);
            font-weight: 500;
        }

        /* FAQ */
        .kai-faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            max-width: 800px;
        }

        .kai-faq-item {
            background: #FFFFFF;
            border: 1px solid var(--kai-border);
            border-radius: var(--kai-radius-sm);
            overflow: hidden;
            transition: var(--kai-transition);
        }

        .kai-faq-item:hover {
            border-color: var(--kai-accent);
        }

        .kai-faq-item.active {
            border-color: var(--kai-accent);
            box-shadow: 0 4px 16px rgba(0, 194, 168, 0.12);
        }

        .kai-faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            cursor: pointer;
            background: none;
            border: none;
            width: 100%;
            font-size: 1rem;
            font-weight: 600;
            color: var(--kai-text);
            font-family: inherit;
            text-align: left;
            transition: var(--kai-transition);
            gap: 12px;
        }

        .kai-faq-question:hover {
            color: var(--kai-accent-deep);
        }

        .kai-faq-question i {
            color: var(--kai-text-muted);
            font-size: 0.9rem;
            transition: var(--kai-transition);
            flex-shrink: 0;
        }

        .kai-faq-item.active .kai-faq-question i {
            transform: rotate(180deg);
            color: var(--kai-accent-deep);
        }

        .kai-faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
        }

        .kai-faq-item.active .kai-faq-answer {
            max-height: 600px;
        }

        .kai-faq-answer-inner {
            padding: 0 22px 20px;
            color: var(--kai-text-light);
            font-size: 0.92rem;
            line-height: 1.75;
        }

        /* CTA */
        .kai-cta-panel {
            background: var(--kai-primary);
            border-radius: var(--kai-radius-lg);
            padding: 48px 40px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
            position: relative;
            overflow: hidden;
        }

        .kai-cta-panel::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -10%;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: rgba(0, 194, 168, 0.12);
            pointer-events: none;
        }

        .kai-cta-panel::after {
            content: '';
            position: absolute;
            bottom: -40%;
            left: 20%;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(255, 92, 53, 0.08);
            pointer-events: none;
        }

        .kai-cta-content {
            position: relative;
            z-index: 1;
            flex: 1;
            min-width: 200px;
        }

        .kai-cta-content h3 {
            font-size: 1.6rem;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 8px;
            letter-spacing: -0.01em;
        }

        .kai-cta-content p {
            color: rgba(255, 255, 255, 0.75);
            font-size: 0.95rem;
            margin: 0;
        }

        .kai-cta-actions {
            position: relative;
            z-index: 1;
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        /* Pagination */
        .kai-pagination {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            padding: 32px 0 8px;
        }

        .kai-pagination button {
            width: 40px;
            height: 40px;
            border-radius: 8px;
            border: 1px solid var(--kai-border);
            background: #FFFFFF;
            color: var(--kai-text);
            font-size: 0.9rem;
            font-weight: 500;
            cursor: pointer;
            transition: var(--kai-transition);
            font-family: inherit;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .kai-pagination button:hover {
            border-color: var(--kai-accent);
            color: var(--kai-accent-deep);
            background: rgba(0, 194, 168, 0.05);
        }

        .kai-pagination button.active {
            background: var(--kai-accent);
            color: #0E141A;
            border-color: var(--kai-accent);
            font-weight: 700;
        }

        .kai-pagination button:disabled {
            opacity: 0.4;
            cursor: not-allowed;
            pointer-events: none;
        }

        /* Footer */
        .kai-footer {
            background: var(--kai-primary);
            color: #AAB5BC;
            padding: 56px 0 24px;
            margin-top: 16px;
        }

        .kai-footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(244, 240, 232, 0.12);
        }

        .kai-footer-brand .kai-logo {
            margin-bottom: 16px;
        }

        .kai-footer-brand p {
            font-size: 0.88rem;
            line-height: 1.75;
            color: #7A8791;
            max-width: 320px;
            margin: 0;
        }

        .kai-footer h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 16px;
            letter-spacing: 0.01em;
        }

        .kai-footer ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .kai-footer li {
            margin-bottom: 10px;
        }

        .kai-footer li a {
            color: #7A8791;
            font-size: 0.88rem;
            transition: var(--kai-transition);
        }

        .kai-footer li a:hover {
            color: var(--kai-accent);
            padding-left: 4px;
        }

        .kai-footer-bottom {
            padding-top: 20px;
            font-size: 0.8rem;
            color: #7A8791;
            line-height: 1.7;
        }

        .kai-footer-bottom a {
            color: #AAB5BC;
            transition: var(--kai-transition);
        }

        .kai-footer-bottom a:hover {
            color: var(--kai-accent);
        }

        @media (max-width: 992px) {
            .kai-nav-links {
                gap: 14px;
            }
            .kai-nav-links a {
                font-size: 0.82rem;
            }
            .kai-cards-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .kai-cards-grid .card-wide {
                grid-column: span 2;
            }
            .kai-cards-grid .card-full {
                grid-column: span 2;
            }
            .kai-stats-row {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .kai-footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .kai-cat-hero h1 {
                font-size: 2.2rem;
            }
        }

        @media (max-width: 768px) {
            .kai-nav-links {
                display: none;
            }
            .kai-nav-cta {
                display: none;
            }
            .kai-hamburger {
                display: flex;
            }
            .kai-mobile-menu.show {
                display: block;
            }
            .kai-cat-hero {
                padding: 48px 0 40px;
            }
            .kai-cat-hero h1 {
                font-size: 1.9rem;
            }
            .kai-cat-hero .kai-cat-desc {
                font-size: 1rem;
            }
            .kai-cards-grid {
                grid-template-columns: 1fr;
            }
            .kai-cards-grid .card-wide {
                grid-column: span 1;
            }
            .kai-cards-grid .card-full {
                grid-column: span 1;
            }
            .kai-card-horizontal {
                flex-direction: column;
            }
            .kai-card-horizontal .kai-card-img {
                width: 100%;
                height: 180px;
                border-radius: var(--kai-radius) var(--kai-radius) 0 0;
            }
            .kai-filter-bar {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }
            .kai-filter-sort {
                width: 100%;
                justify-content: space-between;
            }
            .kai-stats-row {
                grid-template-columns: repeat(2, 1fr);
            }
            .kai-cta-panel {
                flex-direction: column;
                text-align: center;
                padding: 36px 24px;
            }
            .kai-cta-actions {
                justify-content: center;
            }
            .kai-footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .kai-section-title {
                font-size: 1.7rem;
            }
            .kai-card-img-lg {
                height: 220px;
            }
            .kai-section {
                padding: 56px 0;
            }
            .kai-btn-lg {
                padding: 14px 28px;
                font-size: 1rem;
            }
        }

        @media (max-width: 520px) {
            .kai-container {
                padding: 0 16px;
            }
            .kai-cat-hero {
                padding: 36px 0 32px;
            }
            .kai-cat-hero h1 {
                font-size: 1.6rem;
            }
            .kai-cat-actions {
                flex-direction: column;
                width: 100%;
            }
            .kai-cat-actions .kai-btn {
                width: 100%;
            }
            .kai-stats-row {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .kai-stat-num {
                font-size: 1.8rem;
            }
            .kai-stat-item {
                padding: 18px 12px;
            }
            .kai-filter-tag {
                font-size: 0.78rem;
                padding: 5px 12px;
            }
            .kai-card-title {
                font-size: 1.05rem;
            }
            .kai-card-img {
                height: 160px;
            }
            .kai-pagination button {
                width: 36px;
                height: 36px;
                font-size: 0.8rem;
            }
            .kai-cta-content h3 {
                font-size: 1.3rem;
            }
            .kai-footer-bottom {
                font-size: 0.72rem;
            }
        }

/* roulang page: category1 */
:root {
            --kai-primary: #0E141A;
            --kai-primary-soft: #1A232C;
            --kai-surface: #F4F0E8;
            --kai-surface-bright: #FBF9F5;
            --kai-accent: #00C2A8;
            --kai-accent-deep: #009A86;
            --kai-alert: #FF5C35;
            --kai-text: #1C252E;
            --kai-text-light: #4A5560;
            --kai-text-muted: #7A8791;
            --kai-border: #D9D2C5;
            --kai-border-light: #E8E2D7;
            --kai-radius: 12px;
            --kai-radius-sm: 8px;
            --kai-radius-lg: 20px;
            --kai-shadow: 0 8px 24px rgba(14, 20, 26, 0.12);
            --kai-shadow-hover: 0 16px 40px rgba(14, 20, 26, 0.22);
            --kai-transition: all 0.25s ease;
            --kai-max-width: 1200px;
            --kai-section-padding: 88px 0;
            --kai-font-stack: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK SC', 'Inter', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--kai-font-stack);
            font-size: 16px;
            line-height: 1.8;
            color: var(--kai-text);
            background-color: var(--kai-surface);
            padding-bottom: 64px;
            position: relative;
            min-height: 100vh;
        }
        a {
            color: var(--kai-accent-deep);
            text-decoration: none;
            transition: var(--kai-transition);
        }
        a:hover {
            color: var(--kai-accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button, input {
            font-family: inherit;
        }
        button:focus, a:focus, input:focus {
            outline: 3px solid rgba(0, 194, 168, 0.35);
            outline-offset: 2px;
        }
        .kai-container {
            max-width: var(--kai-max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .kai-section {
            padding: var(--kai-section-padding);
            position: relative;
        }
        .kai-section-alt {
            background-color: var(--kai-surface-bright);
        }
        .kai-section-dark {
            background-color: var(--kai-primary);
            color: #E8E4DB;
        }
        .kai-section-dark .kai-section-title {
            color: #FFFFFF;
        }
        .kai-section-dark .kai-section-desc {
            color: #AAB5BC;
        }
        .kai-section-title {
            font-size: 2.1rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: var(--kai-text);
            margin-bottom: 12px;
            line-height: 1.3;
        }
        .kai-section-desc {
            font-size: 1.05rem;
            color: var(--kai-text-light);
            max-width: 720px;
            line-height: 1.8;
            margin-bottom: 32px;
        }
        .kai-section-tag {
            display: inline-block;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--kai-alert);
            background: rgba(255, 92, 53, 0.08);
            padding: 4px 14px;
            border-radius: 999px;
            margin-bottom: 16px;
            letter-spacing: 0.03em;
        }
        .kai-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 999px;
            font-weight: 600;
            font-size: 1rem;
            border: none;
            cursor: pointer;
            transition: var(--kai-transition);
            text-align: center;
            justify-content: center;
        }
        .kai-btn-primary {
            background-color: var(--kai-accent);
            color: #0E141A;
        }
        .kai-btn-primary:hover {
            background-color: var(--kai-accent-deep);
            color: #FFFFFF;
            box-shadow: 0 10px 30px rgba(0, 194, 168, 0.35);
            transform: translateY(-2px);
        }
        .kai-btn-outline-light {
            background: transparent;
            color: #FFFFFF;
            border: 2px solid rgba(244, 240, 232, 0.7);
        }
        .kai-btn-outline-light:hover {
            background: rgba(244, 240, 232, 0.15);
            border-color: #FFFFFF;
            color: #FFFFFF;
            transform: translateY(-2px);
        }
        .kai-btn-outline-dark {
            background: transparent;
            color: var(--kai-primary);
            border: 2px solid var(--kai-primary);
        }
        .kai-btn-outline-dark:hover {
            background: var(--kai-primary);
            color: #FFFFFF;
            transform: translateY(-2px);
        }
        .kai-btn-sm {
            padding: 10px 22px;
            font-size: 0.9rem;
        }

        /* Header / Navigation */
        .kai-header {
            background-color: rgba(244, 240, 232, 0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--kai-border-light);
            position: sticky;
            top: 0;
            z-index: 1040;
            transition: var(--kai-transition);
        }
        .kai-header.scrolled {
            box-shadow: 0 4px 20px rgba(14, 20, 26, 0.08);
        }
        .kai-nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            gap: 24px;
        }
        .kai-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.4rem;
            color: var(--kai-primary);
            letter-spacing: -0.01em;
        }
        .kai-logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: var(--kai-primary);
            color: var(--kai-accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            flex-shrink: 0;
        }
        .kai-nav-links {
            display: flex;
            align-items: center;
            gap: 24px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .kai-nav-links li a {
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--kai-text-light);
            padding: 6px 2px;
            border-bottom: 2px solid transparent;
            transition: var(--kai-transition);
            position: relative;
        }
        .kai-nav-links li a:hover {
            color: var(--kai-primary);
            border-bottom-color: var(--kai-accent);
        }
        .kai-nav-links li a.active {
            color: var(--kai-primary);
            border-bottom-color: var(--kai-accent);
            font-weight: 600;
        }
        .kai-nav-cta {
            white-space: nowrap;
            flex-shrink: 0;
        }
        .kai-hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--kai-primary);
            cursor: pointer;
            padding: 4px 8px;
            transition: var(--kai-transition);
        }
        .kai-hamburger:hover {
            color: var(--kai-accent-deep);
        }
        .kai-mobile-menu {
            display: none;
            background-color: var(--kai-surface-bright);
            border-top: 1px solid var(--kai-border-light);
            padding: 16px 24px 24px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.3s ease;
        }
        .kai-mobile-menu.open {
            max-height: 500px;
            padding: 16px 24px 24px;
        }
        .kai-mobile-menu ul {
            list-style: none;
            margin: 0 0 16px;
            padding: 0;
        }
        .kai-mobile-menu ul li {
            margin-bottom: 4px;
        }
        .kai-mobile-menu ul li a {
            display: block;
            padding: 10px 4px;
            font-weight: 500;
            color: var(--kai-text);
            border-bottom: 1px solid var(--kai-border-light);
            transition: var(--kai-transition);
        }
        .kai-mobile-menu ul li a:hover,
        .kai-mobile-menu ul li a.active {
            color: var(--kai-accent-deep);
            padding-left: 10px;
        }

        /* Breadcrumb */
        .kai-breadcrumb {
            padding: 24px 0 8px;
            font-size: 0.9rem;
            color: var(--kai-text-muted);
        }
        .kai-breadcrumb a {
            color: var(--kai-text-muted);
        }
        .kai-breadcrumb a:hover {
            color: var(--kai-accent-deep);
        }
        .kai-breadcrumb .separator {
            margin: 0 8px;
            color: var(--kai-border);
        }

        /* Category Hero */
        .kai-cat-hero {
            padding: 40px 0 48px;
            background: var(--kai-surface);
            position: relative;
            overflow: hidden;
        }
        .kai-cat-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 80% 20%, rgba(0, 194, 168, 0.08) 0%, transparent 60%);
            pointer-events: none;
        }
        .kai-cat-hero-grid {
            display: grid;
            grid-template-columns: 1.2fr 1fr;
            gap: 48px;
            align-items: center;
            position: relative;
            z-index: 1;
        }
        .kai-cat-hero-title {
            font-size: 2.8rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            line-height: 1.25;
            color: var(--kai-primary);
            margin-bottom: 18px;
        }
        .kai-cat-hero-title .highlight {
            color: var(--kai-accent-deep);
        }
        .kai-cat-hero-desc {
            font-size: 1.08rem;
            color: var(--kai-text-light);
            line-height: 1.85;
            margin-bottom: 28px;
            max-width: 560px;
        }
        .kai-cat-hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 28px;
        }
        .kai-cat-hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            font-size: 0.9rem;
            color: var(--kai-text-muted);
        }
        .kai-cat-hero-meta span {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .kai-cat-hero-meta i {
            color: var(--kai-accent);
        }
        .kai-cat-hero-image {
            position: relative;
            border-radius: var(--kai-radius-lg);
            overflow: hidden;
            box-shadow: var(--kai-shadow);
            transform: rotate(2deg);
            transition: var(--kai-transition);
        }
        .kai-cat-hero-image:hover {
            transform: rotate(0deg);
            box-shadow: var(--kai-shadow-hover);
        }
        .kai-cat-hero-image img {
            width: 100%;
            height: 360px;
            object-fit: cover;
        }
        .kai-cat-hero-image::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(14, 20, 26, 0.25) 0%, transparent 55%);
            pointer-events: none;
        }

        /* Filter Bar */
        .kai-filter-bar {
            padding: 18px 0;
            background: var(--kai-surface-bright);
            border-top: 1px solid var(--kai-border-light);
            border-bottom: 1px solid var(--kai-border-light);
            position: sticky;
            top: 68px;
            z-index: 100;
        }
        .kai-filter-bar-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
        }
        .kai-filter-tabs {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .kai-filter-tab {
            padding: 8px 18px;
            border-radius: 999px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--kai-text-light);
            background: transparent;
            border: 1px solid var(--kai-border);
            cursor: pointer;
            transition: var(--kai-transition);
        }
        .kai-filter-tab:hover {
            border-color: var(--kai-accent);
            color: var(--kai-accent-deep);
        }
        .kai-filter-tab.active {
            background: var(--kai-primary);
            color: #FFFFFF;
            border-color: var(--kai-primary);
        }
        .kai-filter-sort {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
            color: var(--kai-text-muted);
        }
        .kai-filter-sort select {
            padding: 8px 16px;
            border-radius: var(--kai-radius-sm);
            border: 1px solid var(--kai-border);
            background: #FFFFFF;
            font-size: 0.9rem;
            color: var(--kai-text);
            cursor: pointer;
        }

        /* Content Cards - Mixed Layout */
        .kai-cards-section {
            padding: 56px 0 72px;
        }
        .kai-cards-grid-featured {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
            margin-bottom: 40px;
        }
        .kai-card-horizontal {
            display: grid;
            grid-template-columns: 260px 1fr;
            gap: 20px;
            background: #FFFFFF;
            border-radius: var(--kai-radius);
            overflow: hidden;
            box-shadow: var(--kai-shadow);
            transition: var(--kai-transition);
            cursor: pointer;
        }
        .kai-card-horizontal:hover {
            box-shadow: var(--kai-shadow-hover);
            transform: translateY(-4px);
        }
        .kai-card-horizontal .card-cover {
            height: 100%;
            min-height: 200px;
            overflow: hidden;
        }
        .kai-card-horizontal .card-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .kai-card-horizontal:hover .card-cover img {
            transform: scale(1.05);
        }
        .kai-card-horizontal .card-body {
            padding: 20px 20px 20px 0;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .kai-card-horizontal .card-tag {
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--kai-accent-deep);
            margin-bottom: 8px;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .kai-card-horizontal .card-title {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--kai-primary);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .kai-card-horizontal .card-desc {
            font-size: 0.95rem;
            color: var(--kai-text-light);
            line-height: 1.7;
            margin-bottom: 12px;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .kai-card-horizontal .card-meta {
            font-size: 0.82rem;
            color: var(--kai-text-muted);
            display: flex;
            gap: 16px;
        }
        .kai-card-horizontal .card-meta i {
            color: var(--kai-accent);
            margin-right: 4px;
        }

        .kai-cards-list-numbered {
            display: flex;
            flex-direction: column;
            gap: 12px;
            margin-bottom: 40px;
        }
        .kai-card-numbered {
            display: grid;
            grid-template-columns: 56px 1fr auto;
            gap: 16px;
            align-items: center;
            background: #FFFFFF;
            border-radius: var(--kai-radius);
            padding: 16px 20px;
            box-shadow: 0 2px 8px rgba(14, 20, 26, 0.06);
            transition: var(--kai-transition);
            cursor: pointer;
            border-left: 3px solid transparent;
        }
        .kai-card-numbered:hover {
            box-shadow: var(--kai-shadow);
            border-left-color: var(--kai-accent);
            transform: translateX(4px);
        }
        .kai-card-numbered .card-number {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--kai-border);
            text-align: center;
            transition: var(--kai-transition);
        }
        .kai-card-numbered:hover .card-number {
            color: var(--kai-accent-deep);
        }
        .kai-card-numbered .card-info .card-title {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--kai-primary);
            margin-bottom: 4px;
        }
        .kai-card-numbered .card-info .card-desc {
            font-size: 0.88rem;
            color: var(--kai-text-light);
            line-height: 1.6;
        }
        .kai-card-numbered .card-stats {
            display: flex;
            gap: 16px;
            font-size: 0.82rem;
            color: var(--kai-text-muted);
            white-space: nowrap;
        }
        .kai-card-numbered .card-stats i {
            color: var(--kai-alert);
            margin-right: 4px;
        }

        .kai-cards-grid-compact {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .kai-card-compact {
            background: #FFFFFF;
            border-radius: var(--kai-radius);
            overflow: hidden;
            box-shadow: var(--kai-shadow);
            transition: var(--kai-transition);
            cursor: pointer;
        }
        .kai-card-compact:hover {
            box-shadow: var(--kai-shadow-hover);
            transform: translateY(-4px);
        }
        .kai-card-compact .card-cover {
            height: 180px;
            overflow: hidden;
            position: relative;
        }
        .kai-card-compact .card-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .kai-card-compact:hover .card-cover img {
            transform: scale(1.05);
        }
        .kai-card-compact .card-cover .card-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            padding: 4px 12px;
            background: var(--kai-alert);
            color: #FFFFFF;
            font-size: 0.75rem;
            font-weight: 600;
            border-radius: 999px;
        }
        .kai-card-compact .card-body {
            padding: 16px 18px;
        }
        .kai-card-compact .card-title {
            font-size: 1rem;
            font-weight: 600;
            color: var(--kai-primary);
            margin-bottom: 6px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .kai-card-compact .card-desc {
            font-size: 0.85rem;
            color: var(--kai-text-light);
            line-height: 1.6;
            margin-bottom: 10px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .kai-card-compact .card-meta {
            font-size: 0.78rem;
            color: var(--kai-text-muted);
            display: flex;
            justify-content: space-between;
        }

        /* Pagination */
        .kai-pagination-wrap {
            display: flex;
            justify-content: center;
            padding: 20px 0 40px;
        }
        .kai-pagination {
            display: flex;
            gap: 6px;
        }
        .kai-pagination .page-item {
            list-style: none;
        }
        .kai-pagination .page-link {
            display: flex;
            align-items: center;
            justify-content: center;
            min-width: 40px;
            height: 40px;
            padding: 0 14px;
            border-radius: var(--kai-radius-sm);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--kai-text-light);
            background: #FFFFFF;
            border: 1px solid var(--kai-border-light);
            cursor: pointer;
            transition: var(--kai-transition);
        }
        .kai-pagination .page-link:hover {
            border-color: var(--kai-accent);
            color: var(--kai-accent-deep);
        }
        .kai-pagination .page-item.active .page-link {
            background: var(--kai-primary);
            color: #FFFFFF;
            border-color: var(--kai-primary);
        }

        /* Value Props */
        .kai-value-grid {
            display: grid;
            grid-template-columns: 1fr 1.3fr;
            gap: 48px;
            align-items: start;
        }
        .kai-value-left .kai-section-title {
            margin-bottom: 16px;
        }
        .kai-value-left p {
            color: var(--kai-text-light);
            line-height: 1.85;
            margin-bottom: 16px;
        }
        .kai-value-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .kai-value-list li {
            display: flex;
            gap: 14px;
            align-items: flex-start;
            padding: 16px 0;
            border-bottom: 1px solid var(--kai-border-light);
        }
        .kai-value-list li:last-child {
            border-bottom: none;
        }
        .kai-value-list .value-icon {
            width: 42px;
            height: 42px;
            flex-shrink: 0;
            border-radius: var(--kai-radius-sm);
            background: rgba(0, 194, 168, 0.1);
            color: var(--kai-accent-deep);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.15rem;
        }
        .kai-value-list .value-info h4 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--kai-primary);
            margin-bottom: 4px;
        }
        .kai-value-list .value-info p {
            font-size: 0.9rem;
            color: var(--kai-text-light);
            margin: 0;
            line-height: 1.7;
        }

        /* Stats */
        .kai-stats-band {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            padding: 40px 0;
        }
        .kai-stat-item {
            text-align: center;
            padding: 24px 16px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: var(--kai-radius);
            border: 1px solid rgba(255, 255, 255, 0.1);
            transition: var(--kai-transition);
        }
        .kai-stat-item:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-2px);
        }
        .kai-stat-item .stat-number {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--kai-accent);
            letter-spacing: -0.02em;
        }
        .kai-stat-item .stat-label {
            font-size: 0.9rem;
            color: #AAB5BC;
            margin-top: 6px;
        }

        /* Scenarios */
        .kai-scenarios-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        .kai-scenario-card {
            display: grid;
            grid-template-columns: 200px 1fr;
            gap: 20px;
            background: #FFFFFF;
            border-radius: var(--kai-radius);
            overflow: hidden;
            box-shadow: var(--kai-shadow);
            transition: var(--kai-transition);
        }
        .kai-scenario-card:hover {
            box-shadow: var(--kai-shadow-hover);
            transform: translateY(-4px);
        }
        .kai-scenario-card .scenario-cover {
            height: 100%;
            min-height: 180px;
            overflow: hidden;
        }
        .kai-scenario-card .scenario-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .kai-scenario-card .scenario-body {
            padding: 20px 20px 20px 0;
        }
        .kai-scenario-card .scenario-step {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 700;
            color: var(--kai-alert);
            letter-spacing: 0.05em;
            margin-bottom: 8px;
        }
        .kai-scenario-card .scenario-title {
            font-size: 1.15rem;
            font-weight: 600;
            color: var(--kai-primary);
            margin-bottom: 6px;
        }
        .kai-scenario-card .scenario-desc {
            font-size: 0.9rem;
            color: var(--kai-text-light);
            line-height: 1.7;
        }

        /* FAQ */
        .kai-faq-list {
            max-width: 820px;
            margin: 0 auto;
        }
        .kai-faq-item {
            border: 1px solid var(--kai-border-light);
            border-radius: var(--kai-radius-sm);
            margin-bottom: 12px;
            background: #FFFFFF;
            overflow: hidden;
            transition: var(--kai-transition);
        }
        .kai-faq-item:hover {
            border-color: var(--kai-border);
        }
        .kai-faq-question {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--kai-primary);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: var(--kai-transition);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
        }
        .kai-faq-question:hover {
            color: var(--kai-accent-deep);
        }
        .kai-faq-question .faq-toggle-icon {
            font-size: 0.9rem;
            color: var(--kai-text-muted);
            transition: transform 0.3s ease;
            flex-shrink: 0;
            margin-left: 12px;
        }
        .kai-faq-item.open .faq-toggle-icon {
            transform: rotate(180deg);
            color: var(--kai-accent-deep);
        }
        .kai-faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 24px;
            font-size: 0.95rem;
            color: var(--kai-text-light);
            line-height: 1.8;
        }
        .kai-faq-item.open .kai-faq-answer {
            max-height: 400px;
            padding: 0 24px 20px;
        }

        /* CTA Section */
        .kai-cta-band {
            background: var(--kai-primary);
            border-radius: var(--kai-radius-lg);
            padding: 48px 40px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 24px;
            position: relative;
            overflow: hidden;
        }
        .kai-cta-band::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(0, 194, 168, 0.15) 0%, transparent 55%);
            pointer-events: none;
        }
        .kai-cta-band-text {
            position: relative;
            z-index: 1;
        }
        .kai-cta-band-text h3 {
            font-size: 1.6rem;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 8px;
        }
        .kai-cta-band-text p {
            color: #AAB5BC;
            margin: 0;
            font-size: 0.95rem;
        }
        .kai-cta-band-actions {
            display: flex;
            gap: 12px;
            position: relative;
            z-index: 1;
        }

        /* Footer */
        .kai-footer {
            background-color: var(--kai-primary);
            color: #AAB5BC;
            padding: 56px 0 32px;
            margin-top: 48px;
        }
        .kai-footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 40px;
        }
        .kai-footer-brand p {
            font-size: 0.88rem;
            line-height: 1.8;
            margin-top: 14px;
            color: #8A959E;
        }
        .kai-footer h4 {
            font-size: 1rem;
            font-weight: 600;
            color: #FFFFFF;
            margin-bottom: 16px;
        }
        .kai-footer ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .kai-footer ul li {
            margin-bottom: 8px;
        }
        .kai-footer ul li a {
            font-size: 0.88rem;
            color: #8A959E;
            transition: var(--kai-transition);
        }
        .kai-footer ul li a:hover {
            color: var(--kai-accent);
        }
        .kai-footer-bottom {
            text-align: center;
            font-size: 0.82rem;
            color: #6B7680;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }
        .kai-footer-bottom a {
            color: #8A959E;
        }
        .kai-footer-bottom a:hover {
            color: var(--kai-accent);
        }

        /* Responsive */
        @media (max-width: 992px) {
            .kai-nav-links {
                display: none;
            }
            .kai-nav-cta {
                display: none;
            }
            .kai-hamburger {
                display: block;
            }
            .kai-mobile-menu {
                display: block;
            }
            .kai-cat-hero-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .kai-cat-hero-image img {
                height: 300px;
            }
            .kai-cards-grid-featured {
                grid-template-columns: 1fr;
            }
            .kai-cards-grid-compact {
                grid-template-columns: repeat(2, 1fr);
            }
            .kai-value-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .kai-stats-band {
                grid-template-columns: repeat(2, 1fr);
            }
            .kai-scenarios-grid {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 768px) {
            :root {
                --kai-section-padding: 56px 0;
            }
            .kai-section-title {
                font-size: 1.6rem;
            }
            .kai-cat-hero-title {
                font-size: 2rem;
            }
            .kai-cat-hero-actions {
                flex-direction: column;
            }
            .kai-cat-hero-actions .kai-btn {
                width: 100%;
            }
            .kai-card-horizontal {
                grid-template-columns: 1fr;
            }
            .kai-card-horizontal .card-cover {
                min-height: 200px;
                height: 200px;
            }
            .kai-card-horizontal .card-body {
                padding: 16px;
            }
            .kai-card-numbered {
                grid-template-columns: 40px 1fr;
            }
            .kai-card-numbered .card-stats {
                display: none;
            }
            .kai-cards-grid-compact {
                grid-template-columns: 1fr;
            }
            .kai-scenario-card {
                grid-template-columns: 1fr;
            }
            .kai-scenario-card .scenario-cover {
                min-height: 200px;
                height: 200px;
            }
            .kai-scenario-card .scenario-body {
                padding: 16px;
            }
            .kai-footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .kai-cta-band {
                padding: 32px 24px;
                flex-direction: column;
                text-align: center;
            }
            .kai-cta-band-actions {
                flex-direction: column;
                width: 100%;
            }
            .kai-cta-band-actions .kai-btn {
                width: 100%;
            }
            .kai-filter-bar {
                top: 58px;
            }
            .kai-filter-bar-inner {
                flex-direction: column;
                align-items: flex-start;
            }
        }
        @media (max-width: 520px) {
            .kai-cat-hero-title {
                font-size: 1.7rem;
            }
            .kai-cat-hero-image {
                transform: rotate(0);
            }
            .kai-stat-item .stat-number {
                font-size: 1.7rem;
            }
        }

/* roulang page: category4 */
:root {
            --kai-primary: #0E141A;
            --kai-primary-soft: #1A232C;
            --kai-surface: #F4F0E8;
            --kai-surface-bright: #FBF9F5;
            --kai-accent: #00C2A8;
            --kai-accent-deep: #009A86;
            --kai-alert: #FF5C35;
            --kai-text: #1C252E;
            --kai-text-light: #4A5560;
            --kai-text-muted: #7A8791;
            --kai-border: #D9D2C5;
            --kai-border-light: #E8E2D7;
            --kai-radius: 12px;
            --kai-radius-sm: 8px;
            --kai-radius-lg: 20px;
            --kai-shadow: 0 8px 24px rgba(14, 20, 26, 0.12);
            --kai-shadow-hover: 0 16px 40px rgba(14, 20, 26, 0.22);
            --kai-transition: all 0.25s ease;
            --kai-max-width: 1200px;
            --kai-section-padding: 88px 0;
            --kai-font-stack: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK SC', 'Inter', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--kai-font-stack);
            font-size: 16px;
            line-height: 1.8;
            color: var(--kai-text);
            background-color: var(--kai-surface);
            padding-bottom: 64px;
            position: relative;
            min-height: 100vh;
        }
        a {
            color: var(--kai-accent-deep);
            text-decoration: none;
            transition: var(--kai-transition);
        }
        a:hover {
            color: var(--kai-accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input {
            font-family: inherit;
        }
        button:focus,
        a:focus,
        input:focus {
            outline: 3px solid rgba(0, 194, 168, 0.35);
            outline-offset: 2px;
        }
        .kai-container {
            max-width: var(--kai-max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .kai-section {
            padding: var(--kai-section-padding);
            position: relative;
        }
        .kai-section-alt {
            background-color: var(--kai-surface-bright);
        }
        .kai-section-dark {
            background-color: var(--kai-primary);
            color: #E8E4DB;
        }
        .kai-section-dark .kai-section-title {
            color: #FFFFFF;
        }
        .kai-section-dark .kai-section-desc {
            color: #AAB5BC;
        }
        .kai-section-title {
            font-size: 2.1rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: var(--kai-text);
            margin-bottom: 12px;
            line-height: 1.3;
        }
        .kai-section-desc {
            font-size: 1.05rem;
            color: var(--kai-text-light);
            max-width: 720px;
            line-height: 1.8;
            margin-bottom: 32px;
        }
        .kai-section-tag {
            display: inline-block;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--kai-alert);
            background: rgba(255, 92, 53, 0.08);
            padding: 4px 14px;
            border-radius: 999px;
            margin-bottom: 16px;
            letter-spacing: 0.03em;
        }
        .kai-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 999px;
            font-weight: 600;
            font-size: 1rem;
            border: none;
            cursor: pointer;
            transition: var(--kai-transition);
            text-align: center;
            justify-content: center;
        }
        .kai-btn-primary {
            background-color: var(--kai-accent);
            color: #0E141A;
        }
        .kai-btn-primary:hover {
            background-color: var(--kai-accent-deep);
            color: #FFFFFF;
            box-shadow: 0 10px 30px rgba(0, 194, 168, 0.35);
            transform: translateY(-2px);
        }
        .kai-btn-outline-light {
            background: transparent;
            color: #FFFFFF;
            border: 2px solid rgba(244, 240, 232, 0.7);
        }
        .kai-btn-outline-light:hover {
            background: rgba(244, 240, 232, 0.15);
            border-color: #FFFFFF;
            color: #FFFFFF;
            transform: translateY(-2px);
        }
        .kai-btn-outline-dark {
            background: transparent;
            color: var(--kai-primary);
            border: 2px solid var(--kai-primary);
        }
        .kai-btn-outline-dark:hover {
            background: var(--kai-primary);
            color: #FFFFFF;
            transform: translateY(-2px);
        }
        .kai-btn-sm {
            padding: 10px 22px;
            font-size: 0.9rem;
        }
        /* Header / Navigation */
        .kai-header {
            background-color: rgba(244, 240, 232, 0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--kai-border-light);
            position: sticky;
            top: 0;
            z-index: 1040;
            transition: var(--kai-transition);
        }
        .kai-header.scrolled {
            box-shadow: 0 4px 20px rgba(14, 20, 26, 0.08);
        }
        .kai-nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            gap: 24px;
        }
        .kai-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.4rem;
            color: var(--kai-primary);
            letter-spacing: -0.01em;
            white-space: nowrap;
        }
        .kai-logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: var(--kai-primary);
            color: var(--kai-accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            flex-shrink: 0;
        }
        .kai-nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            margin: 0;
            padding: 0;
            flex-wrap: wrap;
        }
        .kai-nav-links li a {
            display: block;
            padding: 8px 14px;
            font-size: 0.92rem;
            font-weight: 600;
            color: var(--kai-text-light);
            border-radius: 999px;
            position: relative;
            transition: var(--kai-transition);
        }
        .kai-nav-links li a:hover {
            color: var(--kai-primary);
            background: rgba(14, 20, 26, 0.05);
        }
        .kai-nav-links li a.active {
            color: var(--kai-accent-deep);
            background: rgba(0, 194, 168, 0.1);
        }
        .kai-nav-links li a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 16px;
            height: 2px;
            background: var(--kai-accent);
            border-radius: 999px;
        }
        .kai-nav-cta {
            white-space: nowrap;
            flex-shrink: 0;
        }
        .kai-hamburger {
            display: none;
            background: var(--kai-primary);
            color: #fff;
            border: none;
            width: 44px;
            height: 44px;
            border-radius: 10px;
            font-size: 1.2rem;
            cursor: pointer;
            align-items: center;
            justify-content: center;
            transition: var(--kai-transition);
        }
        .kai-hamburger:hover {
            background: var(--kai-primary-soft);
        }
        .kai-mobile-menu {
            display: none;
            background: var(--kai-surface-bright);
            border-top: 1px solid var(--kai-border-light);
            padding: 16px 0;
        }
        .kai-mobile-menu ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .kai-mobile-menu ul li a {
            display: block;
            padding: 12px 24px;
            font-weight: 600;
            color: var(--kai-text);
            border-bottom: 1px solid var(--kai-border-light);
            transition: var(--kai-transition);
        }
        .kai-mobile-menu ul li a:hover,
        .kai-mobile-menu ul li a.active {
            color: var(--kai-accent-deep);
            background: rgba(0, 194, 168, 0.06);
        }
        .kai-mobile-menu .kai-btn {
            margin: 16px 24px 0;
        }
        /* Breadcrumb */
        .kai-breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 0.9rem;
            color: var(--kai-text-muted);
            padding: 20px 0 0;
        }
        .kai-breadcrumb a {
            color: var(--kai-text-muted);
        }
        .kai-breadcrumb a:hover {
            color: var(--kai-accent-deep);
        }
        .kai-breadcrumb .sep {
            color: var(--kai-border);
            user-select: none;
        }
        .kai-breadcrumb .current {
            color: var(--kai-text);
            font-weight: 600;
        }
        /* Guide Page Hero */
        .kai-guide-hero {
            background: linear-gradient(135deg, var(--kai-primary) 0%, var(--kai-primary-soft) 55%, #1E3A35 100%);
            color: #E8E4DB;
            padding: 56px 0 64px;
            position: relative;
            overflow: hidden;
        }
        .kai-guide-hero::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -10%;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: rgba(0, 194, 168, 0.08);
            pointer-events: none;
        }
        .kai-guide-hero::after {
            content: '';
            position: absolute;
            bottom: -30%;
            left: -5%;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: rgba(0, 194, 168, 0.05);
            pointer-events: none;
        }
        .kai-guide-hero .kai-container {
            position: relative;
            z-index: 1;
        }
        .kai-guide-hero h1 {
            font-size: 2.8rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: #FFFFFF;
            margin-bottom: 16px;
            line-height: 1.25;
        }
        .kai-guide-hero .lead {
            font-size: 1.15rem;
            color: #B8C4C5;
            max-width: 680px;
            line-height: 1.9;
            margin-bottom: 28px;
        }
        .kai-guide-hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 32px;
        }
        .kai-guide-hero-stat {
            display: flex;
            flex-direction: column;
            gap: 2px;
        }
        .kai-guide-hero-stat .num {
            font-size: 2rem;
            font-weight: 700;
            color: var(--kai-accent);
            letter-spacing: -0.02em;
        }
        .kai-guide-hero-stat .label {
            font-size: 0.9rem;
            color: #8FA0A8;
        }
        /* Steps */
        .kai-steps {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .kai-step-item {
            background: var(--kai-surface-bright);
            border: 1px solid var(--kai-border-light);
            border-radius: var(--kai-radius-lg);
            padding: 28px 24px;
            position: relative;
            transition: var(--kai-transition);
            counter-increment: step;
        }
        .kai-step-item:hover {
            box-shadow: var(--kai-shadow-hover);
            transform: translateY(-4px);
            border-color: rgba(0, 194, 168, 0.3);
        }
        .kai-step-item::before {
            content: counter(step);
            font-size: 3rem;
            font-weight: 700;
            color: rgba(0, 194, 168, 0.18);
            position: absolute;
            top: 12px;
            right: 20px;
            line-height: 1;
            font-family: 'Inter', var(--kai-font-stack);
        }
        .kai-step-item h3 {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--kai-primary);
            margin-bottom: 10px;
            letter-spacing: -0.01em;
            position: relative;
            z-index: 1;
        }
        .kai-step-item p {
            font-size: 0.95rem;
            color: var(--kai-text-light);
            line-height: 1.8;
            margin-bottom: 0;
        }
        /* Guide Cards */
        .kai-guide-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .kai-guide-card {
            background: var(--kai-surface-bright);
            border: 1px solid var(--kai-border-light);
            border-radius: var(--kai-radius-lg);
            overflow: hidden;
            transition: var(--kai-transition);
            display: flex;
            flex-direction: column;
        }
        .kai-guide-card:hover {
            box-shadow: var(--kai-shadow-hover);
            transform: translateY(-4px);
            border-color: rgba(0, 194, 168, 0.3);
        }
        .kai-guide-card-img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            display: block;
            background: var(--kai-primary-soft);
        }
        .kai-guide-card-body {
            padding: 22px 24px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .kai-guide-card-tag {
            display: inline-block;
            font-size: 0.78rem;
            font-weight: 700;
            color: var(--kai-accent-deep);
            background: rgba(0, 194, 168, 0.1);
            padding: 3px 12px;
            border-radius: 999px;
            margin-bottom: 12px;
            align-self: flex-start;
        }
        .kai-guide-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--kai-text);
            margin-bottom: 10px;
            letter-spacing: -0.01em;
        }
        .kai-guide-card p {
            font-size: 0.95rem;
            color: var(--kai-text-light);
            line-height: 1.8;
            margin-bottom: 16px;
            flex: 1;
        }
        .kai-guide-card-link {
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--kai-accent-deep);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: var(--kai-transition);
        }
        .kai-guide-card-link:hover {
            color: var(--kai-accent);
            gap: 10px;
        }
        /* Feature Row */
        .kai-feature-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .kai-feature-row.reverse {
            direction: rtl;
        }
        .kai-feature-row.reverse > * {
            direction: ltr;
        }
        .kai-feature-img {
            border-radius: var(--kai-radius-lg);
            overflow: hidden;
            aspect-ratio: 4/3;
            object-fit: cover;
            box-shadow: var(--kai-shadow);
            width: 100%;
            background: var(--kai-primary-soft);
        }
        .kai-feature-content h3 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--kai-primary);
            margin-bottom: 14px;
            letter-spacing: -0.02em;
            line-height: 1.35;
        }
        .kai-feature-content p {
            font-size: 1rem;
            color: var(--kai-text-light);
            line-height: 1.9;
            margin-bottom: 16px;
        }
        .kai-feature-list {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .kai-feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            margin-bottom: 10px;
            font-size: 0.95rem;
            color: var(--kai-text-light);
        }
        .kai-feature-list li i {
            color: var(--kai-accent);
            margin-top: 5px;
            flex-shrink: 0;
        }
        /* Stats Bar */
        .kai-stats-bar {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .kai-stat-block {
            text-align: center;
            padding: 24px 16px;
            border: 1px solid var(--kai-border-light);
            border-radius: var(--kai-radius);
            background: var(--kai-surface-bright);
            transition: var(--kai-transition);
        }
        .kai-stat-block:hover {
            border-color: rgba(0, 194, 168, 0.3);
            box-shadow: var(--kai-shadow);
        }
        .kai-stat-block .num {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--kai-primary);
            letter-spacing: -0.02em;
            display: block;
            margin-bottom: 6px;
        }
        .kai-stat-block .label {
            font-size: 0.9rem;
            color: var(--kai-text-muted);
        }
        /* FAQ */
        .kai-faq-item {
            border: 1px solid var(--kai-border-light);
            border-radius: var(--kai-radius);
            margin-bottom: 12px;
            overflow: hidden;
            background: var(--kai-surface-bright);
            transition: var(--kai-transition);
        }
        .kai-faq-item:hover {
            border-color: rgba(0, 194, 168, 0.25);
        }
        .kai-faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 24px;
            background: none;
            border: none;
            cursor: pointer;
            font-family: inherit;
            font-size: 1rem;
            font-weight: 700;
            color: var(--kai-text);
            text-align: left;
            transition: var(--kai-transition);
        }
        .kai-faq-question:hover {
            color: var(--kai-accent-deep);
        }
        .kai-faq-question .fa-chevron-down {
            transition: transform 0.3s ease;
            color: var(--kai-text-muted);
            flex-shrink: 0;
        }
        .kai-faq-question.open .fa-chevron-down {
            transform: rotate(180deg);
            color: var(--kai-accent);
        }
        .kai-faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 24px;
        }
        .kai-faq-answer.open {
            max-height: 300px;
            padding: 0 24px 20px;
        }
        .kai-faq-answer p {
            font-size: 0.95rem;
            color: var(--kai-text-light);
            line-height: 1.9;
            margin-bottom: 0;
        }
        /* CTA */
        .kai-cta-box {
            background: linear-gradient(135deg, var(--kai-primary) 0%, #1A3A36 100%);
            border-radius: var(--kai-radius-lg);
            padding: 48px 40px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
        }
        .kai-cta-box h3 {
            font-size: 1.6rem;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 8px;
            letter-spacing: -0.02em;
        }
        .kai-cta-box p {
            color: #A8B8BC;
            margin-bottom: 0;
            font-size: 1rem;
            max-width: 520px;
        }
        /* Footer */
        .kai-footer {
            background-color: var(--kai-primary);
            color: #9AA8B0;
            padding: 56px 0 24px;
            margin-top: 0;
        }
        .kai-footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .kai-footer-brand p {
            font-size: 0.9rem;
            color: #829198;
            line-height: 1.9;
            margin-top: 14px;
            max-width: 360px;
        }
        .kai-footer h4 {
            font-size: 1rem;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 16px;
        }
        .kai-footer ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .kai-footer ul li {
            margin-bottom: 10px;
        }
        .kai-footer ul li a {
            color: #829198;
            font-size: 0.9rem;
            transition: var(--kai-transition);
        }
        .kai-footer ul li a:hover {
            color: var(--kai-accent);
        }
        .kai-footer-bottom {
            border-top: 1px solid rgba(244, 240, 232, 0.1);
            padding-top: 20px;
            font-size: 0.85rem;
            color: #6B7B83;
            line-height: 1.8;
        }
        .kai-footer-bottom a {
            color: #829198;
        }
        .kai-footer-bottom a:hover {
            color: var(--kai-accent);
        }
        /* Bottom Fixed Bar */
        .kai-bottom-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            height: 64px;
            background: var(--kai-primary);
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 24px;
            z-index: 1020;
            border-top: 1px solid rgba(244, 240, 232, 0.1);
            gap: 16px;
        }
        .kai-bottom-bar-text {
            color: #B8C4C5;
            font-size: 0.9rem;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .kai-bottom-bar .kai-btn {
            flex-shrink: 0;
        }
        /* Responsive */
        @media (max-width: 992px) {
            .kai-nav-links {
                display: none;
            }
            .kai-nav-cta {
                display: none;
            }
            .kai-hamburger {
                display: flex;
            }
            .kai-mobile-menu.open {
                display: block;
            }
            .kai-guide-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .kai-step-item {
                padding: 24px 20px;
            }
            .kai-steps {
                grid-template-columns: 1fr 1fr;
            }
            .kai-steps .kai-step-item:last-child {
                grid-column: span 2;
            }
            .kai-feature-row {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .kai-feature-row.reverse {
                direction: ltr;
            }
            .kai-stats-bar {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            :root {
                --kai-section-padding: 56px 0;
            }
            .kai-guide-hero h1 {
                font-size: 2rem;
            }
            .kai-guide-hero .lead {
                font-size: 1rem;
            }
            .kai-section-title {
                font-size: 1.6rem;
            }
            .kai-guide-grid {
                grid-template-columns: 1fr;
            }
            .kai-steps {
                grid-template-columns: 1fr;
            }
            .kai-steps .kai-step-item:last-child {
                grid-column: span 1;
            }
            .kai-cta-box {
                padding: 32px 24px;
                flex-direction: column;
                text-align: center;
            }
            .kai-cta-box p {
                max-width: 100%;
            }
            .kai-footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .kai-footer-brand {
                grid-column: span 2;
            }
            .kai-bottom-bar {
                height: 56px;
                padding: 0 16px;
            }
            .kai-bottom-bar-text {
                font-size: 0.8rem;
            }
            .kai-bottom-bar .kai-btn {
                padding: 8px 16px;
                font-size: 0.85rem;
            }
        }
        @media (max-width: 520px) {
            .kai-container {
                padding: 0 16px;
            }
            .kai-guide-hero {
                padding: 40px 0 48px;
            }
            .kai-guide-hero h1 {
                font-size: 1.7rem;
            }
            .kai-guide-hero-stats {
                gap: 20px;
            }
            .kai-guide-hero-stat .num {
                font-size: 1.5rem;
            }
            .kai-footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .kai-footer-brand {
                grid-column: span 1;
            }
            .kai-stats-bar {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .kai-stat-block .num {
                font-size: 1.6rem;
            }
            .kai-bottom-bar-text {
                display: none;
            }
            .kai-bottom-bar {
                justify-content: center;
            }
        }

/* roulang page: category3 */
:root {
            --kai-primary: #0E141A;
            --kai-primary-soft: #1A232C;
            --kai-surface: #F4F0E8;
            --kai-surface-bright: #FBF9F5;
            --kai-accent: #00C2A8;
            --kai-accent-deep: #009A86;
            --kai-alert: #FF5C35;
            --kai-text: #1C252E;
            --kai-text-light: #4A5560;
            --kai-text-muted: #7A8791;
            --kai-border: #D9D2C5;
            --kai-border-light: #E8E2D7;
            --kai-radius: 12px;
            --kai-radius-sm: 8px;
            --kai-radius-lg: 20px;
            --kai-shadow: 0 8px 24px rgba(14, 20, 26, 0.12);
            --kai-shadow-hover: 0 16px 40px rgba(14, 20, 26, 0.22);
            --kai-transition: all 0.25s ease;
            --kai-max-width: 1200px;
            --kai-section-padding: 88px 0;
            --kai-font-stack: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK SC', 'Inter', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--kai-font-stack);
            font-size: 16px;
            line-height: 1.8;
            color: var(--kai-text);
            background-color: var(--kai-surface);
            padding-bottom: 64px;
            position: relative;
            min-height: 100vh;
        }
        a {
            color: var(--kai-accent-deep);
            text-decoration: none;
            transition: var(--kai-transition);
        }
        a:hover {
            color: var(--kai-accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input {
            font-family: inherit;
        }
        button:focus,
        a:focus,
        input:focus {
            outline: 3px solid rgba(0, 194, 168, 0.35);
            outline-offset: 2px;
        }
        .kai-container {
            max-width: var(--kai-max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .kai-section {
            padding: var(--kai-section-padding);
            position: relative;
        }
        .kai-section-alt {
            background-color: var(--kai-surface-bright);
        }
        .kai-section-dark {
            background-color: var(--kai-primary);
            color: #E8E4DB;
        }
        .kai-section-dark .kai-section-title {
            color: #FFFFFF;
        }
        .kai-section-dark .kai-section-desc {
            color: #AAB5BC;
        }
        .kai-section-title {
            font-size: 2.1rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: var(--kai-text);
            margin-bottom: 12px;
            line-height: 1.3;
        }
        .kai-section-desc {
            font-size: 1.05rem;
            color: var(--kai-text-light);
            max-width: 720px;
            line-height: 1.8;
            margin-bottom: 32px;
        }
        .kai-section-tag {
            display: inline-block;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--kai-alert);
            background: rgba(255, 92, 53, 0.08);
            padding: 4px 14px;
            border-radius: 999px;
            margin-bottom: 16px;
            letter-spacing: 0.03em;
        }
        .kai-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 999px;
            font-weight: 600;
            font-size: 1rem;
            border: none;
            cursor: pointer;
            transition: var(--kai-transition);
            text-align: center;
            justify-content: center;
        }
        .kai-btn-primary {
            background-color: var(--kai-accent);
            color: #0E141A;
        }
        .kai-btn-primary:hover {
            background-color: var(--kai-accent-deep);
            color: #FFFFFF;
            box-shadow: 0 10px 30px rgba(0, 194, 168, 0.35);
            transform: translateY(-2px);
        }
        .kai-btn-outline-light {
            background: transparent;
            color: #FFFFFF;
            border: 2px solid rgba(244, 240, 232, 0.7);
        }
        .kai-btn-outline-light:hover {
            background: rgba(244, 240, 232, 0.15);
            border-color: #FFFFFF;
            color: #FFFFFF;
            transform: translateY(-2px);
        }
        .kai-btn-outline-dark {
            background: transparent;
            color: var(--kai-primary);
            border: 2px solid var(--kai-primary);
        }
        .kai-btn-outline-dark:hover {
            background: var(--kai-primary);
            color: #FFFFFF;
            transform: translateY(-2px);
        }
        .kai-btn-sm {
            padding: 10px 22px;
            font-size: 0.9rem;
        }
        .kai-header {
            background-color: rgba(244, 240, 232, 0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--kai-border-light);
            position: sticky;
            top: 0;
            z-index: 1040;
            transition: var(--kai-transition);
        }
        .kai-header.scrolled {
            box-shadow: 0 4px 20px rgba(14, 20, 26, 0.08);
        }
        .kai-nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            gap: 24px;
        }
        .kai-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.4rem;
            color: var(--kai-primary);
            letter-spacing: -0.01em;
        }
        .kai-logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: var(--kai-primary);
            color: var(--kai-accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
        }
        .kai-nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .kai-nav-links li a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 14px;
            border-radius: 8px;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--kai-text-light);
            transition: var(--kai-transition);
            position: relative;
        }
        .kai-nav-links li a:hover {
            color: var(--kai-accent-deep);
            background: rgba(0, 194, 168, 0.06);
        }
        .kai-nav-links li a.active {
            color: var(--kai-accent-deep);
            background: rgba(0, 194, 168, 0.1);
            font-weight: 600;
        }
        .kai-nav-links li a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 14px;
            right: 14px;
            height: 2px;
            background: var(--kai-accent);
            border-radius: 2px;
        }
        .kai-nav-cta {
            flex-shrink: 0;
        }
        .kai-hamburger {
            display: none;
            background: transparent;
            border: 1px solid var(--kai-border);
            border-radius: 8px;
            width: 42px;
            height: 42px;
            font-size: 1.2rem;
            color: var(--kai-primary);
            cursor: pointer;
            align-items: center;
            justify-content: center;
            transition: var(--kai-transition);
        }
        .kai-hamburger:hover {
            background: var(--kai-primary);
            color: #FFFFFF;
            border-color: var(--kai-primary);
        }
        .kai-mobile-menu {
            display: none;
            background-color: var(--kai-surface-bright);
            border-bottom: 1px solid var(--kai-border-light);
            padding: 16px 24px 24px;
        }
        .kai-mobile-menu ul {
            list-style: none;
            margin: 0 0 16px;
            padding: 0;
        }
        .kai-mobile-menu ul li a {
            display: block;
            padding: 10px 0;
            font-size: 1rem;
            color: var(--kai-text);
            border-bottom: 1px solid var(--kai-border-light);
        }
        .kai-mobile-menu ul li a.active {
            color: var(--kai-accent-deep);
            font-weight: 600;
        }
        .kai-footer {
            background-color: var(--kai-primary);
            color: #AAB5BC;
            padding: 64px 0 32px;
        }
        .kai-footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .kai-footer-brand p {
            font-size: 0.9rem;
            line-height: 1.8;
            color: #8E9AA5;
            margin-top: 16px;
        }
        .kai-footer h4 {
            color: #FFFFFF;
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .kai-footer ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .kai-footer ul li {
            margin-bottom: 8px;
        }
        .kai-footer ul li a {
            color: #8E9AA5;
            font-size: 0.9rem;
            transition: var(--kai-transition);
        }
        .kai-footer ul li a:hover {
            color: #FFFFFF;
        }
        .kai-footer-bottom {
            border-top: 1px solid rgba(244, 240, 232, 0.12);
            padding-top: 24px;
            font-size: 0.82rem;
            color: #7A8791;
            text-align: center;
        }
        .kai-footer-bottom a {
            color: #AAB5BC;
            font-size: 0.82rem;
        }
        .kai-footer-bottom a:hover {
            color: #FFFFFF;
        }

        /* Category page specific styles */
        .kai-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--kai-text-muted);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .kai-breadcrumb a {
            color: var(--kai-text-light);
        }
        .kai-breadcrumb a:hover {
            color: var(--kai-accent-deep);
        }
        .kai-breadcrumb .separator {
            color: var(--kai-border);
        }
        .kai-breadcrumb .current {
            color: var(--kai-accent-deep);
            font-weight: 500;
        }
        .kai-cat-hero {
            padding: 48px 0 40px;
            background: linear-gradient(135deg, rgba(14, 20, 26, 0.03) 0%, rgba(0, 194, 168, 0.05) 100%);
            border-bottom: 1px solid var(--kai-border-light);
        }
        .kai-cat-hero h1 {
            font-size: 2.4rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: var(--kai-primary);
            margin-bottom: 16px;
            line-height: 1.3;
        }
        .kai-cat-hero .kai-cat-desc {
            font-size: 1.08rem;
            color: var(--kai-text-light);
            max-width: 780px;
            line-height: 1.8;
        }
        .kai-filter-bar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 16px 0;
            border-bottom: 1px solid var(--kai-border-light);
            margin-bottom: 32px;
            flex-wrap: wrap;
        }
        .kai-filter-group {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
        }
        .kai-filter-chip {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: 999px;
            font-size: 0.85rem;
            font-weight: 500;
            background: var(--kai-surface-bright);
            border: 1px solid var(--kai-border);
            color: var(--kai-text-light);
            cursor: pointer;
            transition: var(--kai-transition);
            white-space: nowrap;
        }
        .kai-filter-chip:hover {
            border-color: var(--kai-accent);
            color: var(--kai-accent-deep);
        }
        .kai-filter-chip.active {
            background: var(--kai-primary);
            color: #FFFFFF;
            border-color: var(--kai-primary);
        }
        .kai-filter-chip .badge-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--kai-accent);
            flex-shrink: 0;
        }
        .kai-sort-label {
            font-size: 0.85rem;
            color: var(--kai-text-muted);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .kai-sort-select {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            border-radius: 8px;
            border: 1px solid var(--kai-border);
            background: var(--kai-surface-bright);
            font-size: 0.85rem;
            color: var(--kai-text);
            cursor: pointer;
            transition: var(--kai-transition);
        }
        .kai-sort-select:hover {
            border-color: var(--kai-accent);
        }
        .kai-stats-strip {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin: 32px 0 40px;
        }
        .kai-stat-item {
            background: var(--kai-surface-bright);
            border-radius: var(--kai-radius);
            padding: 24px;
            text-align: center;
            border: 1px solid var(--kai-border-light);
            transition: var(--kai-transition);
        }
        .kai-stat-item:hover {
            box-shadow: var(--kai-shadow);
            transform: translateY(-2px);
        }
        .kai-stat-num {
            font-size: 2rem;
            font-weight: 700;
            color: var(--kai-primary);
            letter-spacing: -0.02em;
            line-height: 1.2;
        }
        .kai-stat-num .kai-stat-unit {
            font-size: 1rem;
            color: var(--kai-text-muted);
            font-weight: 500;
        }
        .kai-stat-label {
            font-size: 0.9rem;
            color: var(--kai-text-light);
            margin-top: 8px;
        }
        .kai-stat-icon {
            font-size: 1.5rem;
            color: var(--kai-accent);
            margin-bottom: 12px;
            display: block;
        }
        .kai-obs-grid {
            display: grid;
            grid-template-columns: repeat(12, 1fr);
            gap: 24px;
        }
        .kai-obs-card {
            background: var(--kai-surface-bright);
            border-radius: var(--kai-radius);
            overflow: hidden;
            border: 1px solid var(--kai-border-light);
            transition: var(--kai-transition);
            display: flex;
            flex-direction: column;
            height: 100%;
        }
        .kai-obs-card:hover {
            box-shadow: var(--kai-shadow-hover);
            transform: translateY(-4px);
        }
        .kai-obs-card .kai-obs-img {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16/9;
            background: var(--kai-border-light);
        }
        .kai-obs-card .kai-obs-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--kai-transition);
        }
        .kai-obs-card:hover .kai-obs-img img {
            transform: scale(1.03);
        }
        .kai-obs-img .kai-obs-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--kai-accent);
            color: #0E141A;
            padding: 4px 12px;
            border-radius: 999px;
            font-size: 0.75rem;
            font-weight: 600;
            z-index: 2;
        }
        .kai-obs-img .kai-obs-date {
            position: absolute;
            bottom: 12px;
            right: 12px;
            background: rgba(14, 20, 26, 0.75);
            color: #FFFFFF;
            padding: 4px 12px;
            border-radius: 999px;
            font-size: 0.75rem;
            z-index: 2;
        }
        .kai-obs-body {
            padding: 20px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .kai-obs-body h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--kai-text);
            margin-bottom: 10px;
            line-height: 1.4;
            letter-spacing: -0.01em;
        }
        .kai-obs-body p {
            font-size: 0.88rem;
            color: var(--kai-text-light);
            line-height: 1.7;
            margin-bottom: 16px;
            flex: 1;
        }
        .kai-obs-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            font-size: 0.78rem;
            color: var(--kai-text-muted);
            border-top: 1px solid var(--kai-border-light);
            padding-top: 14px;
        }
        .kai-obs-meta span {
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }
        .kai-obs-meta i {
            color: var(--kai-accent);
        }
        .kai-obs-card.kai-obs-wide {
            grid-column: span 7;
        }
        .kai-obs-card.kai-obs-narrow {
            grid-column: span 5;
        }
        .kai-obs-card.kai-obs-half {
            grid-column: span 6;
        }
        .kai-obs-card.kai-obs-third {
            grid-column: span 4;
        }
        .kai-pagination {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            margin-top: 40px;
            flex-wrap: wrap;
        }
        .kai-page-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 42px;
            height: 42px;
            padding: 0 12px;
            border-radius: 8px;
            font-size: 0.9rem;
            font-weight: 500;
            background: var(--kai-surface-bright);
            border: 1px solid var(--kai-border);
            color: var(--kai-text-light);
            cursor: pointer;
            transition: var(--kai-transition);
        }
        .kai-page-btn:hover {
            border-color: var(--kai-accent);
            color: var(--kai-accent-deep);
        }
        .kai-page-btn.active {
            background: var(--kai-primary);
            color: #FFFFFF;
            border-color: var(--kai-primary);
        }
        .kai-page-btn.disabled {
            opacity: 0.4;
            cursor: not-allowed;
            pointer-events: none;
        }
        .kai-method-steps {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .kai-method-step {
            background: var(--kai-surface-bright);
            border-radius: var(--kai-radius);
            padding: 28px;
            border: 1px solid var(--kai-border-light);
            position: relative;
            transition: var(--kai-transition);
        }
        .kai-method-step:hover {
            box-shadow: var(--kai-shadow);
            transform: translateY(-3px);
        }
        .kai-method-step .kai-step-num {
            font-size: 2.8rem;
            font-weight: 700;
            color: var(--kai-accent);
            letter-spacing: -0.03em;
            line-height: 1;
            margin-bottom: 16px;
            opacity: 0.6;
        }
        .kai-method-step h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--kai-text);
            margin-bottom: 10px;
        }
        .kai-method-step p {
            font-size: 0.9rem;
            color: var(--kai-text-light);
            line-height: 1.7;
            margin: 0;
        }
        .kai-faq-list {
            max-width: 820px;
            margin: 0 auto;
        }
        .kai-faq-item {
            background: var(--kai-surface-bright);
            border-radius: var(--kai-radius-sm);
            border: 1px solid var(--kai-border-light);
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--kai-transition);
        }
        .kai-faq-item:hover {
            border-color: var(--kai-accent);
        }
        .kai-faq-q {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            cursor: pointer;
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--kai-text);
            gap: 12px;
            user-select: none;
        }
        .kai-faq-q .kai-faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(0, 194, 168, 0.1);
            color: var(--kai-accent-deep);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            transition: var(--kai-transition);
        }
        .kai-faq-item.open .kai-faq-icon {
            transform: rotate(45deg);
            background: var(--kai-accent);
            color: #0E141A;
        }
        .kai-faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
        }
        .kai-faq-item.open .kai-faq-a {
            max-height: 300px;
        }
        .kai-faq-a-inner {
            padding: 0 22px 20px;
            font-size: 0.9rem;
            color: var(--kai-text-light);
            line-height: 1.8;
            border-top: 1px solid var(--kai-border-light);
            padding-top: 16px;
        }
        .kai-recommend-section {
            background: linear-gradient(135deg, var(--kai-primary) 0%, #1A232C 100%);
            padding: 56px 0;
            color: #E8E4DB;
            border-radius: var(--kai-radius-lg);
            margin-top: 56px;
        }
        .kai-recommend-section .kai-section-title {
            color: #FFFFFF;
        }
        .kai-recommend-section .kai-section-desc {
            color: #AAB5BC;
        }
        .kai-recommend-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .kai-recommend-item {
            background: rgba(244, 240, 232, 0.06);
            border-radius: var(--kai-radius-sm);
            padding: 22px;
            border: 1px solid rgba(244, 240, 232, 0.1);
            transition: var(--kai-transition);
        }
        .kai-recommend-item:hover {
            background: rgba(244, 240, 232, 0.1);
            border-color: rgba(0, 194, 168, 0.4);
        }
        .kai-recommend-item h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: #FFFFFF;
            margin-bottom: 8px;
        }
        .kai-recommend-item p {
            font-size: 0.82rem;
            color: #AAB5BC;
            margin: 0;
            line-height: 1.6;
        }
        .kai-bottom-cta-fixed {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 1035;
            background: var(--kai-primary);
            border-top: 1px solid rgba(244, 240, 232, 0.1);
            padding: 10px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            min-height: 64px;
        }
        .kai-bottom-cta-fixed .kai-bottom-text {
            color: #E8E4DB;
            font-size: 0.9rem;
            font-weight: 500;
        }
        .kai-bottom-cta-fixed .kai-bottom-text .kai-bottom-highlight {
            color: var(--kai-accent);
            font-weight: 700;
        }

        @media (max-width: 992px) {
            .kai-nav-links {
                display: none;
            }
            .kai-nav-cta {
                display: none;
            }
            .kai-hamburger {
                display: flex;
            }
            .kai-mobile-menu.show {
                display: block;
            }
            .kai-stats-strip {
                grid-template-columns: repeat(2, 1fr);
            }
            .kai-obs-card.kai-obs-wide,
            .kai-obs-card.kai-obs-narrow,
            .kai-obs-card.kai-obs-half,
            .kai-obs-card.kai-obs-third {
                grid-column: span 6;
            }
            .kai-method-steps {
                grid-template-columns: repeat(2, 1fr);
            }
            .kai-footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .kai-recommend-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            .kai-section {
                padding: 56px 0;
            }
            .kai-section-title {
                font-size: 1.6rem;
            }
            .kai-cat-hero {
                padding: 32px 0 28px;
            }
            .kai-cat-hero h1 {
                font-size: 1.7rem;
            }
            .kai-filter-bar {
                flex-direction: column;
                align-items: flex-start;
            }
            .kai-stats-strip {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .kai-stat-num {
                font-size: 1.5rem;
            }
            .kai-obs-card.kai-obs-wide,
            .kai-obs-card.kai-obs-narrow,
            .kai-obs-card.kai-obs-half,
            .kai-obs-card.kai-obs-third {
                grid-column: span 12;
            }
            .kai-method-steps {
                grid-template-columns: 1fr;
            }
            .kai-footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .kai-recommend-grid {
                grid-template-columns: 1fr;
            }
            .kai-bottom-cta-fixed {
                flex-direction: column;
                padding: 12px 16px;
                gap: 10px;
                text-align: center;
                min-height: auto;
            }
            .kai-bottom-cta-fixed .kai-bottom-text {
                font-size: 0.82rem;
            }
            .kai-bottom-cta-fixed .kai-btn {
                width: 100%;
                padding: 10px 20px;
                font-size: 0.85rem;
            }
            body {
                padding-bottom: 120px;
            }
        }
        @media (max-width: 520px) {
            .kai-container {
                padding: 0 16px;
            }
            .kai-stats-strip {
                grid-template-columns: 1fr 1fr;
                gap: 8px;
            }
            .kai-stat-item {
                padding: 16px;
            }
            .kai-obs-body {
                padding: 16px;
            }
            .kai-obs-body h3 {
                font-size: 0.95rem;
            }
            .kai-filter-chip {
                padding: 6px 14px;
                font-size: 0.78rem;
            }
        }

/* roulang page: category5 */
:root {
            --kai-primary: #0E141A;
            --kai-primary-soft: #1A232C;
            --kai-surface: #F4F0E8;
            --kai-surface-bright: #FBF9F5;
            --kai-accent: #00C2A8;
            --kai-accent-deep: #009A86;
            --kai-alert: #FF5C35;
            --kai-text: #1C252E;
            --kai-text-light: #4A5560;
            --kai-text-muted: #7A8791;
            --kai-border: #D9D2C5;
            --kai-border-light: #E8E2D7;
            --kai-radius: 12px;
            --kai-radius-sm: 8px;
            --kai-radius-lg: 20px;
            --kai-shadow: 0 8px 24px rgba(14, 20, 26, 0.12);
            --kai-shadow-hover: 0 16px 40px rgba(14, 20, 26, 0.22);
            --kai-transition: all 0.25s ease;
            --kai-max-width: 1200px;
            --kai-section-padding: 88px 0;
            --kai-font-stack: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK SC', 'Inter', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--kai-font-stack);
            font-size: 16px;
            line-height: 1.8;
            color: var(--kai-text);
            background-color: var(--kai-surface);
            padding-bottom: 72px;
            position: relative;
            min-height: 100vh;
        }

        a {
            color: var(--kai-accent-deep);
            text-decoration: none;
            transition: var(--kai-transition);
        }

        a:hover {
            color: var(--kai-accent);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input {
            font-family: inherit;
        }

        button:focus,
        a:focus,
        input:focus {
            outline: 3px solid rgba(0, 194, 168, 0.35);
            outline-offset: 2px;
        }

        .kai-container {
            max-width: var(--kai-max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        .kai-section {
            padding: var(--kai-section-padding);
            position: relative;
        }

        .kai-section-alt {
            background-color: var(--kai-surface-bright);
        }

        .kai-section-dark {
            background-color: var(--kai-primary);
            color: #E8E4DB;
        }

        .kai-section-dark .kai-section-title {
            color: #FFFFFF;
        }

        .kai-section-dark .kai-section-desc {
            color: #AAB5BC;
        }

        .kai-section-title {
            font-size: 2.1rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: var(--kai-text);
            margin-bottom: 12px;
            line-height: 1.3;
        }

        .kai-section-desc {
            font-size: 1.05rem;
            color: var(--kai-text-light);
            max-width: 720px;
            line-height: 1.8;
            margin-bottom: 32px;
        }

        .kai-section-tag {
            display: inline-block;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--kai-alert);
            background: rgba(255, 92, 53, 0.08);
            padding: 4px 14px;
            border-radius: 999px;
            margin-bottom: 16px;
            letter-spacing: 0.03em;
        }

        .kai-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 999px;
            font-weight: 600;
            font-size: 1rem;
            border: none;
            cursor: pointer;
            transition: var(--kai-transition);
            text-align: center;
            justify-content: center;
        }

        .kai-btn-primary {
            background-color: var(--kai-accent);
            color: #0E141A;
        }

        .kai-btn-primary:hover {
            background-color: var(--kai-accent-deep);
            color: #FFFFFF;
            box-shadow: 0 10px 30px rgba(0, 194, 168, 0.35);
            transform: translateY(-2px);
        }

        .kai-btn-outline-light {
            background: transparent;
            color: #FFFFFF;
            border: 2px solid rgba(244, 240, 232, 0.7);
        }

        .kai-btn-outline-light:hover {
            background: rgba(244, 240, 232, 0.15);
            border-color: #FFFFFF;
            color: #FFFFFF;
            transform: translateY(-2px);
        }

        .kai-btn-outline-dark {
            background: transparent;
            color: var(--kai-primary);
            border: 2px solid var(--kai-primary);
        }

        .kai-btn-outline-dark:hover {
            background: var(--kai-primary);
            color: #FFFFFF;
            transform: translateY(-2px);
        }

        .kai-btn-sm {
            padding: 10px 22px;
            font-size: 0.9rem;
        }

        /* Header / Navigation */
        .kai-header {
            background-color: rgba(244, 240, 232, 0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--kai-border-light);
            position: sticky;
            top: 0;
            z-index: 1040;
            transition: var(--kai-transition);
        }

        .kai-header.scrolled {
            box-shadow: 0 4px 20px rgba(14, 20, 26, 0.08);
        }

        .kai-nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            gap: 24px;
        }

        .kai-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.4rem;
            color: var(--kai-primary);
            letter-spacing: -0.01em;
            flex-shrink: 0;
        }

        .kai-logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: var(--kai-primary);
            color: var(--kai-accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
        }

        .kai-nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            margin: 0;
            padding: 0;
            flex-wrap: nowrap;
        }

        .kai-nav-links li a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 14px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--kai-text-light);
            border-radius: 8px;
            position: relative;
            white-space: nowrap;
            transition: var(--kai-transition);
        }

        .kai-nav-links li a:hover {
            color: var(--kai-primary);
            background-color: rgba(14, 20, 26, 0.05);
        }

        .kai-nav-links li a.active {
            color: var(--kai-accent-deep);
            font-weight: 700;
            background-color: rgba(0, 194, 168, 0.1);
        }

        .kai-nav-links li a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 14px;
            right: 14px;
            height: 2px;
            background-color: var(--kai-accent);
            border-radius: 2px;
        }

        .kai-nav-cta {
            flex-shrink: 0;
        }

        .kai-hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--kai-primary);
            padding: 6px 10px;
            cursor: pointer;
            border-radius: 8px;
            transition: var(--kai-transition);
        }

        .kai-hamburger:hover {
            background-color: rgba(14, 20, 26, 0.06);
        }

        .kai-mobile-menu {
            display: none;
            background-color: var(--kai-surface-bright);
            border-top: 1px solid var(--kai-border-light);
            padding: 16px 24px 24px;
            flex-direction: column;
            gap: 8px;
        }

        .kai-mobile-menu.open {
            display: flex;
        }

        .kai-mobile-menu ul {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .kai-mobile-menu ul li a {
            display: block;
            padding: 12px 16px;
            font-size: 1rem;
            font-weight: 500;
            color: var(--kai-text-light);
            border-radius: 8px;
            transition: var(--kai-transition);
        }

        .kai-mobile-menu ul li a:hover {
            background-color: rgba(14, 20, 26, 0.05);
            color: var(--kai-primary);
        }

        .kai-mobile-menu ul li a.active {
            color: var(--kai-accent-deep);
            font-weight: 700;
            background-color: rgba(0, 194, 168, 0.1);
        }

        /* Category Page Hero */
        .kai-cat-hero {
            min-height: 440px;
            display: flex;
            align-items: flex-end;
            background-size: cover;
            background-position: center;
            position: relative;
            padding: 72px 0 56px;
            overflow: hidden;
        }

        .kai-cat-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(14, 20, 26, 0.82) 0%, rgba(14, 20, 26, 0.55) 45%, rgba(14, 20, 26, 0.35) 100%);
            z-index: 1;
        }

        .kai-cat-hero>.kai-container {
            position: relative;
            z-index: 2;
        }

        .kai-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
            color: rgba(244, 240, 232, 0.7);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }

        .kai-breadcrumb a {
            color: rgba(244, 240, 232, 0.85);
            transition: var(--kai-transition);
        }

        .kai-breadcrumb a:hover {
            color: var(--kai-accent);
        }

        .kai-breadcrumb .kai-breadcrumb-sep {
            color: rgba(244, 240, 232, 0.4);
        }

        .kai-breadcrumb .kai-breadcrumb-current {
            color: #FFFFFF;
            font-weight: 600;
        }

        .kai-cat-hero .kai-cat-hero-title {
            font-size: 2.8rem;
            font-weight: 700;
            color: #FFFFFF;
            letter-spacing: -0.02em;
            line-height: 1.25;
            margin-bottom: 16px;
            max-width: 760px;
        }

        .kai-cat-hero .kai-cat-hero-desc {
            font-size: 1.1rem;
            color: rgba(244, 240, 232, 0.8);
            max-width: 640px;
            line-height: 1.8;
            margin-bottom: 24px;
        }

        .kai-hero-badges {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
            margin-bottom: 28px;
        }

        .kai-hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            border-radius: 999px;
            font-size: 0.85rem;
            font-weight: 600;
            background: rgba(255, 255, 255, 0.12);
            color: #FFFFFF;
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.2);
        }

        .kai-hero-badge .fa-solid {
            color: var(--kai-accent);
        }

        .kai-cat-hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }

        /* Filter bar */
        .kai-filter-bar {
            background-color: var(--kai-surface-bright);
            border: 1px solid var(--kai-border-light);
            border-radius: var(--kai-radius);
            padding: 18px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            margin-top: 32px;
            box-shadow: 0 4px 12px rgba(14, 20, 26, 0.05);
        }

        .kai-filter-tags {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }

        .kai-filter-tag {
            padding: 7px 18px;
            border-radius: 999px;
            font-size: 0.9rem;
            font-weight: 500;
            border: 1px solid var(--kai-border);
            background: transparent;
            color: var(--kai-text-light);
            cursor: pointer;
            transition: var(--kai-transition);
            white-space: nowrap;
        }

        .kai-filter-tag:hover {
            border-color: var(--kai-accent);
            color: var(--kai-accent-deep);
            background: rgba(0, 194, 168, 0.05);
        }

        .kai-filter-tag.kai-filter-tag-active {
            background: var(--kai-accent);
            color: #0E141A;
            border-color: var(--kai-accent);
            font-weight: 700;
        }

        .kai-filter-sort {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
            color: var(--kai-text-muted);
        }

        .kai-filter-sort select {
            padding: 7px 14px;
            border-radius: 8px;
            border: 1px solid var(--kai-border);
            background: #FFFFFF;
            font-size: 0.9rem;
            color: var(--kai-text);
            cursor: pointer;
        }

        /* Featured cards */
        .kai-featured-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
            margin-top: 32px;
        }

        .kai-featured-card {
            background: #FFFFFF;
            border-radius: var(--kai-radius);
            overflow: hidden;
            box-shadow: var(--kai-shadow);
            transition: var(--kai-transition);
            display: flex;
            flex-direction: column;
            border: 1px solid var(--kai-border-light);
            position: relative;
        }

        .kai-featured-card:hover {
            box-shadow: var(--kai-shadow-hover);
            transform: translateY(-4px);
            border-color: rgba(0, 194, 168, 0.3);
        }

        .kai-featured-card-media {
            width: 100%;
            height: 220px;
            overflow: hidden;
            position: relative;
            background: var(--kai-primary-soft);
        }

        .kai-featured-card-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .kai-featured-card:hover .kai-featured-card-media img {
            transform: scale(1.05);
        }

        .kai-featured-card-media .kai-featured-card-number {
            position: absolute;
            top: 16px;
            left: 16px;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(14, 20, 26, 0.75);
            color: var(--kai-accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.1rem;
            backdrop-filter: blur(6px);
            -webkit-backdrop-filter: blur(6px);
        }

        .kai-featured-card-media .kai-featured-card-tag {
            position: absolute;
            top: 16px;
            right: 16px;
            padding: 4px 14px;
            border-radius: 999px;
            font-size: 0.8rem;
            font-weight: 600;
            background: rgba(0, 194, 168, 0.85);
            color: #0E141A;
        }

        .kai-featured-card-body {
            padding: 22px 24px 24px;
            display: flex;
            flex-direction: column;
            gap: 10px;
            flex: 1;
        }

        .kai-featured-card-title {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--kai-text);
            letter-spacing: -0.01em;
            line-height: 1.4;
            margin: 0;
        }

        .kai-featured-card-title a {
            color: inherit;
        }

        .kai-featured-card-title a:hover {
            color: var(--kai-accent-deep);
        }

        .kai-featured-card-summary {
            font-size: 0.95rem;
            color: var(--kai-text-light);
            line-height: 1.7;
            margin: 0;
            flex: 1;
        }

        .kai-featured-card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.82rem;
            color: var(--kai-text-muted);
            padding-top: 12px;
            border-top: 1px solid var(--kai-border-light);
        }

        .kai-featured-card-meta span {
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        .kai-featured-card-meta .fa-solid {
            color: var(--kai-accent);
        }

        .kai-featured-card-wide {
            grid-column: span 2;
            flex-direction: row;
        }

        .kai-featured-card-wide .kai-featured-card-media {
            width: 45%;
            height: auto;
            min-height: 280px;
            flex-shrink: 0;
        }

        .kai-featured-card-wide .kai-featured-card-body {
            padding: 28px 32px;
            flex: 1;
        }

        .kai-featured-card-wide .kai-featured-card-title {
            font-size: 1.5rem;
        }

        /* Highlights section */
        .kai-highlight-item {
            background: #FFFFFF;
            border-radius: var(--kai-radius);
            padding: 28px 24px;
            box-shadow: var(--kai-shadow);
            border: 1px solid var(--kai-border-light);
            transition: var(--kai-transition);
            height: 100%;
        }

        .kai-highlight-item:hover {
            box-shadow: var(--kai-shadow-hover);
            transform: translateY(-4px);
        }

        .kai-highlight-item .kai-highlight-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: rgba(0, 194, 168, 0.1);
            color: var(--kai-accent-deep);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            margin-bottom: 16px;
        }

        .kai-highlight-item h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--kai-text);
            margin-bottom: 8px;
        }

        .kai-highlight-item p {
            font-size: 0.95rem;
            color: var(--kai-text-light);
            line-height: 1.7;
            margin: 0;
        }

        /* Data strip */
        .kai-data-strip {
            display: flex;
            align-items: center;
            justify-content: space-around;
            flex-wrap: wrap;
            gap: 24px 40px;
            padding: 36px 24px;
            background: var(--kai-primary);
            border-radius: var(--kai-radius);
        }

        .kai-data-item {
            text-align: center;
        }

        .kai-data-item .kai-data-number {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--kai-accent);
            letter-spacing: -0.02em;
            line-height: 1.2;
        }

        .kai-data-item .kai-data-label {
            font-size: 0.95rem;
            color: rgba(244, 240, 232, 0.7);
            margin-top: 4px;
        }

        /* Pagination */
        .kai-pagination {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            margin-top: 40px;
            flex-wrap: wrap;
        }

        .kai-page-link {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            border-radius: 10px;
            font-weight: 600;
            font-size: 0.95rem;
            border: 1px solid var(--kai-border);
            background: #FFFFFF;
            color: var(--kai-text-light);
            transition: var(--kai-transition);
            cursor: pointer;
        }

        .kai-page-link:hover {
            border-color: var(--kai-accent);
            color: var(--kai-accent-deep);
            background: rgba(0, 194, 168, 0.05);
        }

        .kai-page-link.kai-page-link-active {
            background: var(--kai-accent);
            color: #0E141A;
            border-color: var(--kai-accent);
            font-weight: 700;
        }

        .kai-page-link.kai-page-link-disabled {
            opacity: 0.4;
            pointer-events: none;
        }

        /* FAQ */
        .kai-faq-item {
            background: #FFFFFF;
            border: 1px solid var(--kai-border-light);
            border-radius: var(--kai-radius);
            margin-bottom: 14px;
            overflow: hidden;
            transition: var(--kai-transition);
        }

        .kai-faq-item:hover {
            border-color: rgba(0, 194, 168, 0.25);
            box-shadow: 0 4px 12px rgba(14, 20, 26, 0.06);
        }

        .kai-faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 24px;
            font-weight: 700;
            font-size: 1.05rem;
            color: var(--kai-text);
            cursor: pointer;
            border: none;
            background: none;
            width: 100%;
            text-align: left;
            transition: var(--kai-transition);
        }

        .kai-faq-question:hover {
            color: var(--kai-accent-deep);
        }

        .kai-faq-question .kai-faq-toggle {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(0, 194, 168, 0.1);
            color: var(--kai-accent-deep);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.9rem;
            transition: transform 0.3s ease;
        }

        .kai-faq-item.open .kai-faq-toggle {
            transform: rotate(180deg);
        }

        .kai-faq-answer {
            display: none;
            padding: 0 24px 20px;
            font-size: 0.95rem;
            color: var(--kai-text-light);
            line-height: 1.8;
        }

        .kai-faq-item.open .kai-faq-answer {
            display: block;
        }

        /* CTA Section */
        .kai-cta-panel {
            background: var(--kai-primary);
            border-radius: var(--kai-radius-lg);
            padding: 48px 40px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 24px;
            position: relative;
            overflow: hidden;
        }

        .kai-cta-panel::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 240px;
            height: 240px;
            border-radius: 50%;
            background: rgba(0, 194, 168, 0.12);
            z-index: 0;
        }

        .kai-cta-panel>* {
            position: relative;
            z-index: 1;
        }

        .kai-cta-panel h3 {
            font-size: 1.6rem;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 8px;
            letter-spacing: -0.01em;
        }

        .kai-cta-panel p {
            color: rgba(244, 240, 232, 0.7);
            margin: 0;
            font-size: 1rem;
            line-height: 1.7;
        }

        /* Footer */
        .kai-footer {
            background-color: var(--kai-primary);
            color: rgba(244, 240, 232, 0.75);
            padding: 56px 0 32px;
            margin-top: 64px;
        }

        .kai-footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .kai-footer-brand p {
            font-size: 0.9rem;
            line-height: 1.8;
            color: rgba(244, 240, 232, 0.6);
            margin-top: 16px;
            max-width: 380px;
        }

        .kai-footer h4 {
            font-size: 1rem;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 16px;
            letter-spacing: 0.01em;
        }

        .kai-footer ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .kai-footer ul li {
            margin-bottom: 10px;
        }

        .kai-footer ul li a {
            color: rgba(244, 240, 232, 0.65);
            font-size: 0.9rem;
            transition: var(--kai-transition);
        }

        .kai-footer ul li a:hover {
            color: var(--kai-accent);
        }

        .kai-footer-bottom {
            border-top: 1px solid rgba(244, 240, 232, 0.12);
            padding-top: 24px;
            font-size: 0.82rem;
            color: rgba(244, 240, 232, 0.45);
            line-height: 1.7;
        }

        .kai-footer-bottom a {
            color: rgba(244, 240, 232, 0.6);
            margin: 0 4px;
        }

        .kai-footer-bottom a:hover {
            color: var(--kai-accent);
        }

        /* Fixed bottom bar */
        .kai-fixed-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            background: var(--kai-primary);
            color: #FFFFFF;
            z-index: 1050;
            box-shadow: 0 -4px 16px rgba(14, 20, 26, 0.18);
            padding: 12px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            min-height: 64px;
        }

        .kai-fixed-bar-text {
            font-size: 0.95rem;
            font-weight: 500;
            color: rgba(244, 240, 232, 0.85);
            display: flex;
            align-items: center;
            gap: 10px;
            flex: 1;
            min-width: 0;
        }

        .kai-fixed-bar-text .fa-solid {
            color: var(--kai-accent);
            flex-shrink: 0;
        }

        .kai-fixed-bar-action {
            flex-shrink: 0;
        }

        /* Responsive */
        @media (max-width: 1200px) {
            .kai-nav-links li a {
                padding: 8px 10px;
                font-size: 0.88rem;
            }
        }

        @media (max-width: 992px) {
            .kai-section {
                padding: 56px 0;
            }

            .kai-section-title {
                font-size: 1.8rem;
            }

            .kai-featured-grid {
                grid-template-columns: 1fr;
            }

            .kai-featured-card-wide {
                grid-column: span 1;
                flex-direction: column;
            }

            .kai-featured-card-wide .kai-featured-card-media {
                width: 100%;
                height: 220px;
                min-height: auto;
            }

            .kai-featured-card-wide .kai-featured-card-body {
                padding: 22px 24px 24px;
            }

            .kai-featured-card-wide .kai-featured-card-title {
                font-size: 1.25rem;
            }

            .kai-footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }

            .kai-cat-hero .kai-cat-hero-title {
                font-size: 2.2rem;
            }
        }

        @media (max-width: 768px) {
            .kai-nav-links {
                display: none;
            }

            .kai-nav-cta {
                display: none;
            }

            .kai-hamburger {
                display: block;
            }

            .kai-mobile-menu {
                display: none;
            }

            .kai-mobile-menu.open {
                display: flex;
            }

            .kai-cat-hero {
                min-height: 360px;
                padding: 48px 0 40px;
            }

            .kai-cat-hero .kai-cat-hero-title {
                font-size: 1.8rem;
            }

            .kai-cat-hero .kai-cat-hero-desc {
                font-size: 1rem;
            }

            .kai-featured-card-media {
                height: 180px;
            }

            .kai-featured-card-wide .kai-featured-card-media {
                height: 180px;
            }

            .kai-filter-bar {
                flex-direction: column;
                align-items: stretch;
            }

            .kai-filter-tags {
                justify-content: center;
            }

            .kai-filter-sort {
                justify-content: center;
            }

            .kai-data-strip {
                padding: 24px 16px;
                gap: 20px;
            }

            .kai-data-item .kai-data-number {
                font-size: 2rem;
            }

            .kai-footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .kai-cta-panel {
                padding: 32px 24px;
                flex-direction: column;
                align-items: flex-start;
            }

            .kai-fixed-bar {
                min-height: 56px;
                padding: 10px 16px;
                gap: 12px;
            }

            .kai-fixed-bar-text {
                font-size: 0.85rem;
            }

            .kai-fixed-bar-action .kai-btn {
                padding: 8px 16px;
                font-size: 0.85rem;
            }
        }

        @media (max-width: 520px) {
            .kai-container {
                padding: 0 16px;
            }

            .kai-section-title {
                font-size: 1.6rem;
            }

            .kai-cat-hero .kai-cat-hero-title {
                font-size: 1.5rem;
            }

            .kai-cat-hero .kai-cat-hero-desc {
                font-size: 0.95rem;
            }

            .kai-featured-card-media {
                height: 160px;
            }

            .kai-featured-card-wide .kai-featured-card-media {
                height: 160px;
            }

            .kai-featured-card-body {
                padding: 16px 18px 20px;
            }

            .kai-featured-card-title {
                font-size: 1.1rem;
            }

            .kai-btn {
                padding: 12px 24px;
                font-size: 0.95rem;
            }

            .kai-btn-sm {
                padding: 8px 18px;
                font-size: 0.85rem;
            }

            .kai-data-strip {
                flex-direction: column;
                gap: 16px;
            }
        }

/* roulang page: category6 */
:root {
            --kai-primary: #0E141A;
            --kai-primary-soft: #1A232C;
            --kai-surface: #F4F0E8;
            --kai-surface-bright: #FBF9F5;
            --kai-accent: #00C2A8;
            --kai-accent-deep: #009A86;
            --kai-alert: #FF5C35;
            --kai-text: #1C252E;
            --kai-text-light: #4A5560;
            --kai-text-muted: #7A8791;
            --kai-border: #D9D2C5;
            --kai-border-light: #E8E2D7;
            --kai-radius: 12px;
            --kai-radius-sm: 8px;
            --kai-radius-lg: 20px;
            --kai-shadow: 0 8px 24px rgba(14, 20, 26, 0.12);
            --kai-shadow-hover: 0 16px 40px rgba(14, 20, 26, 0.22);
            --kai-transition: all 0.25s ease;
            --kai-max-width: 1200px;
            --kai-section-padding: 88px 0;
            --kai-font-stack: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK SC', 'Inter', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--kai-font-stack);
            font-size: 16px;
            line-height: 1.8;
            color: var(--kai-text);
            background-color: var(--kai-surface);
            padding-bottom: 64px;
            position: relative;
            min-height: 100vh;
            margin: 0;
        }

        a {
            color: var(--kai-accent-deep);
            text-decoration: none;
            transition: var(--kai-transition);
        }

        a:hover {
            color: var(--kai-accent);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input {
            font-family: inherit;
        }

        button:focus,
        a:focus,
        input:focus {
            outline: 3px solid rgba(0, 194, 168, 0.35);
            outline-offset: 2px;
        }

        .kai-container {
            max-width: var(--kai-max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        .kai-section {
            padding: var(--kai-section-padding);
            position: relative;
        }

        .kai-section-alt {
            background-color: var(--kai-surface-bright);
        }

        .kai-section-dark {
            background-color: var(--kai-primary);
            color: #E8E4DB;
        }

        .kai-section-dark .kai-section-title {
            color: #FFFFFF;
        }

        .kai-section-dark .kai-section-desc {
            color: #AAB5BC;
        }

        .kai-section-title {
            font-size: 2.1rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: var(--kai-text);
            margin-bottom: 12px;
            line-height: 1.3;
        }

        .kai-section-desc {
            font-size: 1.05rem;
            color: var(--kai-text-light);
            max-width: 720px;
            line-height: 1.8;
            margin-bottom: 32px;
        }

        .kai-section-tag {
            display: inline-block;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--kai-alert);
            background: rgba(255, 92, 53, 0.08);
            padding: 4px 14px;
            border-radius: 999px;
            margin-bottom: 16px;
            letter-spacing: 0.03em;
        }

        .kai-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 999px;
            font-weight: 600;
            font-size: 1rem;
            border: none;
            cursor: pointer;
            transition: var(--kai-transition);
            text-align: center;
            justify-content: center;
            text-decoration: none;
        }

        .kai-btn-primary {
            background-color: var(--kai-accent);
            color: #0E141A;
        }

        .kai-btn-primary:hover {
            background-color: var(--kai-accent-deep);
            color: #FFFFFF;
            box-shadow: 0 10px 30px rgba(0, 194, 168, 0.35);
            transform: translateY(-2px);
        }

        .kai-btn-outline-light {
            background: transparent;
            color: #FFFFFF;
            border: 2px solid rgba(244, 240, 232, 0.7);
        }

        .kai-btn-outline-light:hover {
            background: rgba(244, 240, 232, 0.15);
            border-color: #FFFFFF;
            color: #FFFFFF;
            transform: translateY(-2px);
        }

        .kai-btn-outline-dark {
            background: transparent;
            color: var(--kai-primary);
            border: 2px solid var(--kai-primary);
        }

        .kai-btn-outline-dark:hover {
            background: var(--kai-primary);
            color: #FFFFFF;
            transform: translateY(-2px);
        }

        .kai-btn-sm {
            padding: 10px 22px;
            font-size: 0.9rem;
        }

        /* Header / Navigation */
        .kai-header {
            background-color: rgba(244, 240, 232, 0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--kai-border-light);
            position: sticky;
            top: 0;
            z-index: 1040;
            transition: var(--kai-transition);
        }

        .kai-header.scrolled {
            box-shadow: 0 4px 20px rgba(14, 20, 26, 0.08);
        }

        .kai-nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            gap: 24px;
        }

        .kai-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.4rem;
            color: var(--kai-primary);
            letter-spacing: -0.01em;
            text-decoration: none;
        }

        .kai-logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: var(--kai-primary);
            color: var(--kai-accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
        }

        .kai-nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .kai-nav-links li a {
            display: inline-block;
            padding: 8px 14px;
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--kai-text-light);
            text-decoration: none;
            border-radius: 6px;
            transition: var(--kai-transition);
            position: relative;
        }

        .kai-nav-links li a::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 14px;
            right: 14px;
            height: 2px;
            background: var(--kai-accent);
            border-radius: 2px;
            transform: scaleX(0);
            transform-origin: left;
            transition: var(--kai-transition);
        }

        .kai-nav-links li a:hover {
            color: var(--kai-primary);
            background: rgba(0, 194, 168, 0.06);
        }

        .kai-nav-links li a:hover::after {
            transform: scaleX(1);
        }

        .kai-nav-links li a.active {
            color: var(--kai-primary);
            background: rgba(0, 194, 168, 0.1);
        }

        .kai-nav-links li a.active::after {
            transform: scaleX(1);
        }

        .kai-nav-cta {
            flex-shrink: 0;
        }

        .kai-hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.6rem;
            color: var(--kai-primary);
            cursor: pointer;
            padding: 6px 10px;
            border-radius: 6px;
            transition: var(--kai-transition);
            line-height: 1;
        }

        .kai-hamburger:hover {
            background: rgba(0, 194, 168, 0.1);
        }

        .kai-mobile-menu {
            display: none;
            background: var(--kai-surface-bright);
            border-bottom: 1px solid var(--kai-border-light);
            padding: 16px 24px;
        }

        .kai-mobile-menu ul {
            list-style: none;
            margin: 0 0 16px 0;
            padding: 0;
        }

        .kai-mobile-menu ul li a {
            display: block;
            padding: 12px 0;
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--kai-text);
            border-bottom: 1px solid var(--kai-border-light);
            text-decoration: none;
            transition: var(--kai-transition);
        }

        .kai-mobile-menu ul li a:hover {
            color: var(--kai-accent-deep);
            padding-left: 8px;
        }

        .kai-mobile-menu ul li a.active {
            color: var(--kai-accent-deep);
        }

        /* Banner / Hero for category page */
        .kai-cat-banner {
            position: relative;
            min-height: 420px;
            display: flex;
            align-items: center;
            padding: 72px 0;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            isolation: isolate;
            overflow: hidden;
        }

        .kai-cat-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(14, 20, 26, 0.88) 0%, rgba(14, 20, 26, 0.65) 50%, rgba(14, 20, 26, 0.5) 100%);
            z-index: -1;
        }

        .kai-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            list-style: none;
            margin: 0 0 20px 0;
            padding: 0;
            flex-wrap: wrap;
        }

        .kai-breadcrumb li {
            font-size: 0.9rem;
            color: rgba(232, 228, 219, 0.7);
        }

        .kai-breadcrumb li a {
            color: rgba(232, 228, 219, 0.85);
            text-decoration: none;
        }

        .kai-breadcrumb li a:hover {
            color: var(--kai-accent);
        }

        .kai-breadcrumb li:not(:last-child)::after {
            content: '/';
            margin-left: 8px;
            color: rgba(232, 228, 219, 0.4);
        }

        .kai-cat-banner h1 {
            font-size: 2.8rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: #FFFFFF;
            margin-bottom: 16px;
            line-height: 1.2;
        }

        .kai-cat-banner .kai-banner-desc {
            font-size: 1.1rem;
            color: rgba(232, 228, 219, 0.85);
            max-width: 680px;
            line-height: 1.8;
            margin-bottom: 28px;
        }

        .kai-banner-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* Filter / sort visual bar */
        .kai-filter-bar {
            background: var(--kai-surface-bright);
            border: 1px solid var(--kai-border-light);
            border-radius: var(--kai-radius);
            padding: 16px 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            margin: -36px auto 0;
            position: relative;
            z-index: 10;
            max-width: var(--kai-max-width);
            box-shadow: var(--kai-shadow);
        }

        .kai-filter-tags {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
        }

        .kai-filter-tag {
            padding: 8px 18px;
            border-radius: 999px;
            font-size: 0.85rem;
            font-weight: 600;
            border: 1px solid var(--kai-border);
            background: transparent;
            color: var(--kai-text-light);
            cursor: pointer;
            transition: var(--kai-transition);
            white-space: nowrap;
        }

        .kai-filter-tag:hover {
            border-color: var(--kai-accent);
            color: var(--kai-accent-deep);
            background: rgba(0, 194, 168, 0.06);
        }

        .kai-filter-tag.active {
            background: var(--kai-primary);
            border-color: var(--kai-primary);
            color: #FFFFFF;
        }

        .kai-filter-sort {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .kai-filter-sort span {
            font-size: 0.85rem;
            color: var(--kai-text-muted);
            white-space: nowrap;
        }

        .kai-filter-sort select {
            padding: 8px 14px;
            border-radius: var(--kai-radius-sm);
            border: 1px solid var(--kai-border);
            background: #FFFFFF;
            font-size: 0.85rem;
            color: var(--kai-text);
            cursor: pointer;
        }

        /* Calendar schedule cards */
        .kai-schedule-grid {
            display: grid;
            grid-template-columns: repeat(12, 1fr);
            gap: 24px;
            margin-top: 32px;
        }

        .kai-schedule-card {
            grid-column: span 4;
            background: #FFFFFF;
            border-radius: var(--kai-radius);
            overflow: hidden;
            border: 1px solid var(--kai-border-light);
            box-shadow: var(--kai-shadow);
            transition: var(--kai-transition);
            display: flex;
            flex-direction: column;
        }

        .kai-schedule-card:hover {
            box-shadow: var(--kai-shadow-hover);
            transform: translateY(-4px);
        }

        .kai-schedule-card:nth-child(7n+1) {
            grid-column: span 6;
            flex-direction: row;
        }

        .kai-schedule-card:nth-child(7n+2) {
            grid-column: span 6;
            flex-direction: row;
        }

        .kai-schedule-card:nth-child(6n+4) {
            grid-column: span 6;
        }

        .kai-schedule-card:nth-child(5n+3) {
            grid-column: span 6;
        }

        .kai-schedule-cover {
            position: relative;
            overflow: hidden;
            flex-shrink: 0;
            background: var(--kai-surface);
        }

        .kai-schedule-card:nth-child(7n+1) .kai-schedule-cover,
        .kai-schedule-card:nth-child(7n+2) .kai-schedule-cover {
            width: 45%;
            min-height: 260px;
        }

        .kai-schedule-card:not(:nth-child(7n+1)):not(:nth-child(7n+2)) .kai-schedule-cover {
            height: 190px;
        }

        .kai-schedule-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--kai-transition);
        }

        .kai-schedule-card:hover .kai-schedule-cover img {
            transform: scale(1.04);
        }

        .kai-schedule-date-badge {
            position: absolute;
            top: 14px;
            left: 14px;
            background: rgba(14, 20, 26, 0.85);
            color: #FFFFFF;
            font-size: 0.8rem;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: 6px;
            letter-spacing: 0.02em;
        }

        .kai-schedule-tag {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 700;
            color: var(--kai-accent-deep);
            background: rgba(0, 194, 168, 0.1);
            padding: 3px 10px;
            border-radius: 999px;
            letter-spacing: 0.03em;
        }

        .kai-schedule-tag.hot {
            color: var(--kai-alert);
            background: rgba(255, 92, 53, 0.1);
        }

        .kai-schedule-tag.special {
            color: #7C5CFF;
            background: rgba(124, 92, 255, 0.1);
        }

        .kai-schedule-tag.obs {
            color: #D49424;
            background: rgba(212, 148, 36, 0.12);
        }

        .kai-schedule-tag.guide {
            color: #3B82F6;
            background: rgba(59, 130, 246, 0.1);
        }

        .kai-schedule-tag.featured {
            color: #EC4899;
            background: rgba(236, 72, 153, 0.1);
        }

        .kai-schedule-card-body {
            padding: 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .kai-schedule-card-body h3 {
            font-size: 1.15rem;
            font-weight: 700;
            letter-spacing: -0.01em;
            color: var(--kai-text);
            margin: 10px 0 8px;
            line-height: 1.4;
        }

        .kai-schedule-card-body p {
            font-size: 0.92rem;
            color: var(--kai-text-light);
            line-height: 1.7;
            margin-bottom: 14px;
            flex: 1;
        }

        .kai-schedule-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.8rem;
            color: var(--kai-text-muted);
        }

        .kai-schedule-meta i {
            color: var(--kai-accent);
            margin-right: 4px;
        }

        /* Timeline section */
        .kai-timeline-wrapper {
            display: flex;
            gap: 32px;
            margin-top: 32px;
        }

        .kai-timeline-main {
            flex: 1;
            min-width: 0;
        }

        .kai-timeline-side {
            width: 320px;
            flex-shrink: 0;
        }

        .kai-timeline-list {
            list-style: none;
            margin: 0;
            padding: 0;
            position: relative;
        }

        .kai-timeline-list::before {
            content: '';
            position: absolute;
            left: 9px;
            top: 8px;
            bottom: 8px;
            width: 2px;
            background: var(--kai-border-light);
        }

        .kai-timeline-item {
            position: relative;
            padding-left: 40px;
            padding-bottom: 28px;
        }

        .kai-timeline-item:last-child {
            padding-bottom: 0;
        }

        .kai-timeline-dot {
            position: absolute;
            left: 2px;
            top: 14px;
            width: 16px;
            height: 16px;
            border-radius: 50%;
            background: var(--kai-accent);
            border: 3px solid var(--kai-surface);
            box-shadow: 0 0 0 3px var(--kai-border-light);
        }

        .kai-timeline-item.past .kai-timeline-dot {
            background: var(--kai-text-muted);
            box-shadow: 0 0 0 3px var(--kai-border-light);
        }

        .kai-timeline-item.upcoming .kai-timeline-dot {
            background: var(--kai-alert);
            box-shadow: 0 0 0 3px rgba(255, 92, 53, 0.2);
        }

        .kai-timeline-item h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--kai-text);
            margin-bottom: 6px;
            line-height: 1.4;
        }

        .kai-timeline-item .kai-timeline-date {
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--kai-accent-deep);
            display: block;
            margin-bottom: 6px;
        }

        .kai-timeline-item p {
            font-size: 0.92rem;
            color: var(--kai-text-light);
            line-height: 1.7;
            margin-bottom: 8px;
        }

        .kai-timeline-item .kai-schedule-tag {
            margin-right: 6px;
        }

        /* Stat strip */
        .kai-stat-strip {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
            padding: 28px 32px;
            background: var(--kai-primary);
            border-radius: var(--kai-radius);
            margin-top: 32px;
        }

        .kai-stat-item {
            text-align: center;
            flex: 1;
            min-width: 120px;
        }

        .kai-stat-num {
            font-size: 2rem;
            font-weight: 700;
            color: var(--kai-accent);
            letter-spacing: -0.02em;
            line-height: 1.2;
        }

        .kai-stat-label {
            font-size: 0.85rem;
            color: #AAB5BC;
            margin-top: 4px;
        }

        /* FAQ section */
        .kai-accordion-item {
            border: 1px solid var(--kai-border-light);
            border-radius: var(--kai-radius);
            margin-bottom: 12px;
            background: #FFFFFF;
            overflow: hidden;
            transition: var(--kai-transition);
        }

        .kai-accordion-item:hover {
            border-color: var(--kai-border);
        }

        .kai-accordion-btn {
            width: 100%;
            background: none;
            border: none;
            padding: 18px 22px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--kai-text);
            text-align: left;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            transition: var(--kai-transition);
        }

        .kai-accordion-btn:hover {
            color: var(--kai-accent-deep);
        }

        .kai-accordion-btn i {
            transition: var(--kai-transition);
            color: var(--kai-accent);
            flex-shrink: 0;
        }

        .kai-accordion-item.active .kai-accordion-btn i {
            transform: rotate(180deg);
        }

        .kai-accordion-body {
            display: none;
            padding: 0 22px 18px;
            font-size: 0.95rem;
            color: var(--kai-text-light);
            line-height: 1.8;
        }

        .kai-accordion-item.active .kai-accordion-body {
            display: block;
        }

        /* CTA section */
        .kai-cta-section {
            background: var(--kai-primary);
            border-radius: var(--kai-radius-lg);
            padding: 48px 40px;
            text-align: center;
            color: #E8E4DB;
        }

        .kai-cta-section h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 12px;
            letter-spacing: -0.02em;
        }

        .kai-cta-section p {
            color: #AAB5BC;
            max-width: 600px;
            margin: 0 auto 24px;
            line-height: 1.8;
        }

        /* Footer */
        .kai-footer {
            background: var(--kai-primary);
            color: #B8C0C6;
            padding: 56px 0 32px;
            margin-top: 72px;
        }

        .kai-footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 36px;
        }

        .kai-footer-brand p {
            font-size: 0.9rem;
            line-height: 1.8;
            margin-top: 12px;
            color: #8A959C;
            max-width: 360px;
        }

        .kai-footer h4 {
            font-size: 1rem;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 16px;
        }

        .kai-footer ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .kai-footer ul li {
            margin-bottom: 8px;
        }

        .kai-footer ul li a {
            color: #8A959C;
            font-size: 0.9rem;
            text-decoration: none;
            transition: var(--kai-transition);
        }

        .kai-footer ul li a:hover {
            color: var(--kai-accent);
            padding-left: 4px;
        }

        .kai-footer-bottom {
            border-top: 1px solid rgba(232, 228, 219, 0.1);
            padding-top: 24px;
            font-size: 0.85rem;
            color: #7A8791;
            line-height: 1.6;
            text-align: center;
        }

        .kai-footer-bottom a {
            color: var(--kai-accent);
            text-decoration: none;
        }

        .kai-footer-bottom a:hover {
            color: #FFFFFF;
        }

        /* Pagination */
        .kai-pagination {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            margin-top: 36px;
            flex-wrap: wrap;
        }

        .kai-pagination a,
        .kai-pagination span {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 8px;
            font-size: 0.9rem;
            font-weight: 600;
            transition: var(--kai-transition);
            border: 1px solid var(--kai-border);
            color: var(--kai-text-light);
            text-decoration: none;
            background: #FFFFFF;
        }

        .kai-pagination a:hover {
            border-color: var(--kai-accent);
            color: var(--kai-accent-deep);
            background: rgba(0, 194, 168, 0.05);
        }

        .kai-pagination span.current {
            background: var(--kai-primary);
            border-color: var(--kai-primary);
            color: #FFFFFF;
        }

        /* Bottom fixed CTA bar */
        .kai-fixed-cta {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            height: 64px;
            background: var(--kai-primary);
            border-top: 1px solid rgba(232, 228, 219, 0.12);
            z-index: 1030;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 24px;
        }

        .kai-fixed-cta-text {
            color: #AAB5BC;
            font-size: 0.9rem;
            line-height: 1.4;
        }

        .kai-fixed-cta-text strong {
            color: #FFFFFF;
        }

        /* Responsive */
        @media (max-width: 992px) {
            .kai-nav-links {
                display: none;
            }

            .kai-nav-cta {
                display: none;
            }

            .kai-hamburger {
                display: inline-flex;
                align-items: center;
                justify-content: center;
            }

            .kai-mobile-menu.open {
                display: block;
            }

            .kai-cat-banner h1 {
                font-size: 2.2rem;
            }

            .kai-schedule-card,
            .kai-schedule-card:nth-child(7n+1),
            .kai-schedule-card:nth-child(7n+2),
            .kai-schedule-card:nth-child(6n+4),
            .kai-schedule-card:nth-child(5n+3) {
                grid-column: span 6;
                flex-direction: column;
            }

            .kai-schedule-card:nth-child(7n+1) .kai-schedule-cover,
            .kai-schedule-card:nth-child(7n+2) .kai-schedule-cover {
                width: 100%;
                min-height: 190px;
                height: 190px;
            }

            .kai-timeline-wrapper {
                flex-direction: column;
            }

            .kai-timeline-side {
                width: 100%;
            }

            .kai-footer-grid {
                grid-template-columns: 1fr 1fr;
            }

            .kai-filter-bar {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
                margin-top: -24px;
            }

            .kai-stat-strip {
                gap: 20px;
                padding: 24px;
            }
        }

        @media (max-width: 576px) {
            .kai-section {
                padding: 56px 0;
            }

            .kai-section-title {
                font-size: 1.6rem;
            }

            .kai-cat-banner {
                min-height: 340px;
                padding: 48px 0;
            }

            .kai-cat-banner h1 {
                font-size: 1.75rem;
            }

            .kai-cat-banner .kai-banner-desc {
                font-size: 0.95rem;
            }

            .kai-schedule-card,
            .kai-schedule-card:nth-child(7n+1),
            .kai-schedule-card:nth-child(7n+2),
            .kai-schedule-card:nth-child(6n+4),
            .kai-schedule-card:nth-child(5n+3) {
                grid-column: span 12;
                flex-direction: column;
            }

            .kai-schedule-card:nth-child(7n+1) .kai-schedule-cover,
            .kai-schedule-card:nth-child(7n+2) .kai-schedule-cover {
                width: 100%;
                min-height: 180px;
                height: 180px;
            }

            .kai-footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .kai-fixed-cta {
                height: 56px;
                padding: 0 16px;
            }

            .kai-fixed-cta-text {
                font-size: 0.8rem;
            }

            .kai-fixed-cta .kai-btn {
                padding: 8px 16px;
                font-size: 0.8rem;
            }

            .kai-stat-num {
                font-size: 1.5rem;
            }

            .kai-stat-strip {
                flex-direction: row;
                flex-wrap: wrap;
                gap: 16px;
                padding: 20px;
            }

            .kai-stat-item {
                min-width: 45%;
            }

            .kai-cta-section {
                padding: 32px 20px;
            }

            .kai-cta-section h2 {
                font-size: 1.4rem;
            }

            .kai-filter-tag {
                padding: 6px 14px;
                font-size: 0.78rem;
            }
        }