/* roulang page: index */
:root {
            --color-brand: #2563eb;
            --color-brand-dark: #1d4ed8;
            --color-brand-light: #dbeafe;
            --color-accent: #0d9488;
            --color-text: #1e293b;
            --color-text-soft: #64748b;
            --color-text-weak: #94a3b8;
            --color-bg: #f8fafc;
            --color-surface: #ffffff;
            --color-border: #e2e8f0;
            --color-border-light: #f1f5f9;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-xs: 0 1px 2px rgba(0,0,0,0.04);
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 14px rgba(0,0,0,0.07), 0 2px 6px rgba(0,0,0,0.05);
            --shadow-lg: 0 10px 30px rgba(0,0,0,0.08), 0 4px 10px rgba(0,0,0,0.04);
            --shadow-xl: 0 20px 50px rgba(0,0,0,0.10), 0 8px 20px rgba(0,0,0,0.05);
            --transition-fast: 0.15s ease;
            --transition-base: 0.25s ease;
            --transition-slow: 0.35s ease;
        }

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

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

        body {
            margin: 0;
            padding: 0;
            font-family: "Inter", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            min-height: 100vh;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }

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

        button,
        input {
            font-family: inherit;
        }

        .container {
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        @media (min-width: 1280px) {
            .container {
                max-width: 1240px;
            }
        }

        /* Header & Navigation */
        .site-header {
            background: var(--color-surface);
            border-bottom: 1px solid var(--color-border-light);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: var(--shadow-xs);
        }

        .header-brand-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 14px;
            padding-bottom: 14px;
            border-bottom: 1px solid var(--color-border-light);
        }

        .header-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--color-brand);
            letter-spacing: -0.02em;
            white-space: nowrap;
            transition: color var(--transition-fast);
        }

        .header-logo:hover {
            color: var(--color-brand-dark);
        }

        .header-logo .logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, #2563eb, #1d4ed8);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 800;
            font-size: 1.1rem;
            flex-shrink: 0;
        }

        .header-brand-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .btn-header-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 9px 18px;
            background: var(--color-brand);
            color: #fff;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .btn-header-cta:hover {
            background: var(--color-brand-dark);
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }

        .header-channel-row {
            display: flex;
            align-items: center;
            gap: 4px;
            padding-top: 10px;
            padding-bottom: 10px;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
        }

        .header-channel-row::-webkit-scrollbar {
            display: none;
        }

        .nav-channel-link {
            display: inline-flex;
            align-items: center;
            padding: 8px 18px;
            border-radius: 20px;
            font-size: 0.93rem;
            font-weight: 500;
            color: var(--color-text-soft);
            white-space: nowrap;
            transition: all var(--transition-fast);
            cursor: pointer;
            background: transparent;
            border: 1px solid transparent;
        }

        .nav-channel-link:hover {
            color: var(--color-brand);
            background: var(--color-brand-light);
            border-color: transparent;
        }

        .nav-channel-link.active {
            color: #fff;
            background: var(--color-brand);
            font-weight: 600;
            border-color: var(--color-brand);
            box-shadow: var(--shadow-sm);
        }

        .nav-channel-link .nav-dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            margin-right: 6px;
            flex-shrink: 0;
        }

        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--color-text);
            cursor: pointer;
            padding: 6px;
            line-height: 1;
        }

        @media (max-width: 768px) {
            .header-brand-row {
                padding-top: 10px;
                padding-bottom: 10px;
            }
            .header-logo {
                font-size: 1.25rem;
            }
            .header-logo .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 0.95rem;
            }
            .btn-header-cta {
                padding: 7px 14px;
                font-size: 0.82rem;
            }
            .header-channel-row {
                gap: 2px;
                padding-top: 8px;
                padding-bottom: 8px;
            }
            .nav-channel-link {
                padding: 7px 13px;
                font-size: 0.85rem;
                border-radius: 16px;
            }
        }

        @media (max-width: 480px) {
            .header-logo {
                font-size: 1.1rem;
            }
            .header-logo .logo-icon {
                width: 28px;
                height: 28px;
                font-size: 0.8rem;
            }
            .btn-header-cta {
                padding: 6px 10px;
                font-size: 0.75rem;
                gap: 3px;
            }
            .nav-channel-link {
                padding: 6px 10px;
                font-size: 0.78rem;
                border-radius: 14px;
            }
        }

        /* Hero */
        .hero-section {
            position: relative;
            background: linear-gradient(135deg, #1e3a8a 0%, #1d4ed8 30%, #2563eb 60%, #3b82f6 100%);
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            padding: 90px 0 100px;
            color: #fff;
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 70% 30%, rgba(255,255,255,0.08) 0%, transparent 60%);
            pointer-events: none;
        }

        .hero-inner {
            position: relative;
            z-index: 2;
            max-width: 780px;
        }

        .hero-badge {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(255,255,255,0.15);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255,255,255,0.25);
            border-radius: 20px;
            font-size: 0.88rem;
            font-weight: 500;
            color: #e0f2fe;
            margin-bottom: 20px;
            letter-spacing: 0.01em;
        }

        .hero-title {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.25;
            margin: 0 0 20px;
            letter-spacing: -0.025em;
            color: #fff;
        }

        .hero-subtitle {
            font-size: 1.18rem;
            line-height: 1.7;
            color: rgba(255,255,255,0.85);
            margin: 0 0 36px;
            max-width: 600px;
        }

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

        .btn-hero-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 30px;
            background: #fff;
            color: var(--color-brand);
            border-radius: var(--radius-md);
            font-size: 1rem;
            font-weight: 700;
            border: none;
            cursor: pointer;
            transition: all var(--transition-base);
            box-shadow: var(--shadow-lg);
        }

        .btn-hero-primary:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-xl);
        }

        .btn-hero-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 30px;
            background: transparent;
            color: #fff;
            border-radius: var(--radius-md);
            font-size: 1rem;
            font-weight: 600;
            border: 2px solid rgba(255,255,255,0.5);
            cursor: pointer;
            transition: all var(--transition-base);
        }

        .btn-hero-outline:hover {
            background: rgba(255,255,255,0.1);
            border-color: #fff;
        }

        .hero-stats-row {
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
            margin-top: 50px;
            padding-top: 30px;
            border-top: 1px solid rgba(255,255,255,0.2);
        }

        .hero-stat-item {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .hero-stat-number {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.02em;
        }

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

        @media (max-width: 768px) {
            .hero-section {
                padding: 50px 0 60px;
            }
            .hero-title {
                font-size: 1.9rem;
            }
            .hero-subtitle {
                font-size: 1rem;
            }
            .hero-stats-row {
                gap: 24px;
                margin-top: 32px;
                padding-top: 22px;
            }
            .hero-stat-number {
                font-size: 1.5rem;
            }
            .btn-hero-primary,
            .btn-hero-outline {
                padding: 12px 22px;
                font-size: 0.93rem;
            }
        }

        @media (max-width: 480px) {
            .hero-title {
                font-size: 1.55rem;
            }
            .hero-subtitle {
                font-size: 0.93rem;
            }
            .hero-stats-row {
                gap: 16px;
            }
            .hero-stat-number {
                font-size: 1.3rem;
            }
            .hero-stat-label {
                font-size: 0.78rem;
            }
            .hero-actions {
                flex-direction: column;
                gap: 10px;
            }
            .btn-hero-primary,
            .btn-hero-outline {
                width: 100%;
                justify-content: center;
            }
        }

        /* Sections */
        .section {
            padding: 80px 0;
        }

        .section-header {
            text-align: center;
            margin-bottom: 52px;
        }

        .section-label {
            display: inline-block;
            padding: 5px 15px;
            background: var(--color-brand-light);
            color: var(--color-brand);
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.03em;
            margin-bottom: 14px;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 800;
            color: var(--color-text);
            margin: 0 0 14px;
            letter-spacing: -0.02em;
            line-height: 1.3;
        }

        .section-desc {
            font-size: 1.05rem;
            color: var(--color-text-soft);
            max-width: 620px;
            margin: 0 auto;
            line-height: 1.7;
        }

        @media (max-width: 768px) {
            .section {
                padding: 50px 0;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .section-desc {
                font-size: 0.95rem;
            }
            .section-header {
                margin-bottom: 36px;
            }
        }

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

        .service-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            padding: 36px 28px 32px;
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-base);
            position: relative;
            overflow: hidden;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .service-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: var(--color-brand-light);
        }

        .service-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--color-brand), var(--color-accent));
            opacity: 0;
            transition: opacity var(--transition-base);
        }

        .service-card:hover::before {
            opacity: 1;
        }

        .service-card-icon {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            flex-shrink: 0;
        }

        .service-card-icon.blue {
            background: #eff6ff;
            color: #2563eb;
        }

        .service-card-icon.teal {
            background: #f0fdfa;
            color: #0d9488;
        }

        .service-card-icon.amber {
            background: #fffbeb;
            color: #d97706;
        }

        .service-card-title {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--color-text);
            margin: 0;
            letter-spacing: -0.01em;
        }

        .service-card-desc {
            font-size: 0.95rem;
            color: var(--color-text-soft);
            line-height: 1.65;
            margin: 0;
            flex-grow: 1;
        }

        .service-card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 600;
            font-size: 0.93rem;
            color: var(--color-brand);
            transition: gap var(--transition-fast);
        }

        .service-card-link:hover {
            gap: 10px;
            color: var(--color-brand-dark);
        }

        .service-card-image {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-radius: var(--radius-md);
            margin-bottom: 4px;
        }

        @media (max-width: 768px) {
            .service-cards-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .service-card {
                padding: 28px 22px 26px;
            }
            .service-card-image {
                height: 160px;
            }
        }

        @media (min-width: 769px) and (max-width: 1024px) {
            .service-cards-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        /* CMS News List */
        .news-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        .news-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            padding: 24px 26px;
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .news-card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--color-brand-light);
            transform: translateY(-2px);
        }

        .news-card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.82rem;
            color: var(--color-text-weak);
        }

        .news-card-tag {
            padding: 3px 10px;
            background: var(--color-brand-light);
            color: var(--color-brand);
            border-radius: 12px;
            font-size: 0.78rem;
            font-weight: 600;
        }

        .news-card-title {
            font-size: 1.08rem;
            font-weight: 700;
            color: var(--color-text);
            margin: 0;
            line-height: 1.45;
            transition: color var(--transition-fast);
        }

        .news-card:hover .news-card-title {
            color: var(--color-brand);
        }

        .news-card-excerpt {
            font-size: 0.9rem;
            color: var(--color-text-soft);
            line-height: 1.6;
            margin: 0;
            flex-grow: 1;
        }

        .news-empty {
            text-align: center;
            padding: 48px 20px;
            color: var(--color-text-soft);
            font-size: 1rem;
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            border: 1px dashed var(--color-border);
        }

        @media (max-width: 768px) {
            .news-list {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .news-card {
                padding: 18px 20px;
            }
        }

        /* Stats Bar */
        .stats-bar {
            background: var(--color-surface);
            border-top: 1px solid var(--color-border-light);
            border-bottom: 1px solid var(--color-border-light);
            padding: 48px 0;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            text-align: center;
        }

        .stat-block-number {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--color-brand);
            letter-spacing: -0.02em;
            line-height: 1;
            margin-bottom: 8px;
        }

        .stat-block-label {
            font-size: 0.95rem;
            color: var(--color-text-soft);
            font-weight: 500;
        }

        @media (max-width: 768px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
            .stat-block-number {
                font-size: 1.8rem;
            }
            .stats-bar {
                padding: 32px 0;
            }
        }

        @media (max-width: 480px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
            .stat-block-number {
                font-size: 1.5rem;
            }
            .stat-block-label {
                font-size: 0.82rem;
            }
        }

        /* Process */
        .process-list {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }

        .process-item {
            text-align: center;
            position: relative;
            padding: 28px 16px 24px;
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-base);
        }

        .process-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }

        .process-step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--color-brand);
            color: #fff;
            font-weight: 700;
            font-size: 1.1rem;
            margin-bottom: 14px;
        }

        .process-step-title {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--color-text);
            margin: 0 0 8px;
        }

        .process-step-desc {
            font-size: 0.88rem;
            color: var(--color-text-soft);
            line-height: 1.55;
            margin: 0;
        }

        @media (max-width: 768px) {
            .process-list {
                grid-template-columns: repeat(2, 1fr);
                gap: 14px;
            }
        }

        @media (max-width: 480px) {
            .process-list {
                grid-template-columns: 1fr;
                gap: 12px;
            }
        }

        /* FAQ */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border-light);
            overflow: hidden;
            transition: all var(--transition-base);
        }

        .faq-item:hover {
            border-color: var(--color-brand-light);
            box-shadow: var(--shadow-sm);
        }

        .faq-question {
            width: 100%;
            padding: 20px 24px;
            background: none;
            border: none;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            font-size: 1.02rem;
            font-weight: 600;
            color: var(--color-text);
            text-align: left;
            line-height: 1.5;
            transition: color var(--transition-fast);
        }

        .faq-question:hover {
            color: var(--color-brand);
        }

        .faq-icon {
            flex-shrink: 0;
            font-size: 1.1rem;
            color: var(--color-text-weak);
            transition: transform var(--transition-fast);
        }

        .faq-answer {
            padding: 0 24px 20px;
            font-size: 0.95rem;
            color: var(--color-text-soft);
            line-height: 1.7;
            display: none;
        }

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

        .faq-item.open .faq-icon {
            transform: rotate(180deg);
            color: var(--color-brand);
        }

        .faq-item.open {
            border-color: var(--color-brand-light);
            box-shadow: var(--shadow-sm);
        }

        @media (max-width: 768px) {
            .faq-question {
                padding: 16px 18px;
                font-size: 0.95rem;
            }
            .faq-answer {
                padding: 0 18px 16px;
                font-size: 0.9rem;
            }
        }

        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, #1e3a8a 0%, #2563eb 50%, #1d4ed8 100%);
            padding: 70px 0;
            color: #fff;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover;
            opacity: 0.08;
            pointer-events: none;
        }

        .cta-inner {
            position: relative;
            z-index: 2;
            max-width: 650px;
            margin: 0 auto;
        }

        .cta-title {
            font-size: 2rem;
            font-weight: 800;
            margin: 0 0 16px;
            letter-spacing: -0.02em;
        }

        .cta-desc {
            font-size: 1.05rem;
            color: rgba(255,255,255,0.85);
            margin: 0 0 32px;
            line-height: 1.7;
        }

        .btn-cta-large {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 16px 36px;
            background: #fff;
            color: var(--color-brand);
            border-radius: var(--radius-md);
            font-size: 1.05rem;
            font-weight: 700;
            border: none;
            cursor: pointer;
            transition: all var(--transition-base);
            box-shadow: var(--shadow-lg);
        }

        .btn-cta-large:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-xl);
        }

        @media (max-width: 768px) {
            .cta-section {
                padding: 48px 0;
            }
            .cta-title {
                font-size: 1.5rem;
            }
            .cta-desc {
                font-size: 0.95rem;
            }
            .btn-cta-large {
                padding: 14px 28px;
                font-size: 0.95rem;
            }
        }

        /* Footer */
        .site-footer {
            background: #0f172a;
            color: #cbd5e1;
            padding: 52px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }

        .footer-brand-name {
            font-size: 1.3rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }

        .footer-brand-desc {
            font-size: 0.9rem;
            color: #94a3b8;
            line-height: 1.65;
            max-width: 280px;
        }

        .footer-col-title {
            font-size: 0.95rem;
            font-weight: 700;
            color: #e2e8f0;
            margin-bottom: 16px;
        }

        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-links a {
            color: #94a3b8;
            font-size: 0.9rem;
            transition: color var(--transition-fast);
        }

        .footer-links a:hover {
            color: #fff;
        }

        .footer-bottom {
            padding: 22px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: #64748b;
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }

        @media (max-width: 480px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* Utility */
        .bg-soft {
            background: #f8fafc;
        }

        .bg-white-section {
            background: #ffffff;
        }

        .text-brand {
            color: var(--color-brand);
        }

/* roulang page: article */
:root {
            --color-primary: #1e3a5f;
            --color-secondary: #0d9488;
            --color-accent: #3b82f6;
            --color-warm: #d97706;
            --color-purple: #7c3aed;
            --color-light: #f8fafc;
            --color-surface: #ffffff;
            --color-muted: #64748b;
            --color-border: #e2e8f0;
            --color-dark: #0f172a;
            --radius-card: 1rem;
            --radius-btn: 0.6rem;
            --radius-tag: 2rem;
            --shadow-card: 0 1px 4px rgba(0,0,0,0.06), 0 4px 16px rgba(0,0,0,0.04);
            --shadow-elevated: 0 2px 8px rgba(0,0,0,0.08), 0 8px 28px rgba(0,0,0,0.06);
            --shadow-btn: 0 2px 6px rgba(0,0,0,0.08);
            --max-content-width: 780px;
        }
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body { font-family: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif; line-height: 1.7; color: #1e293b; background: #f8fafc; min-height: 100vh; }
        img { max-width: 100%; height: auto; display: block; }
        a { text-decoration: none; color: inherit; transition: color 0.2s ease; }
        button, input, textarea { font-family: inherit; }
        .container { width: 100%; max-width: 1200px; margin-left: auto; margin-right: auto; padding-left: 1.25rem; padding-right: 1.25rem; }
        .container-narrow { max-width: 900px; }
        @media (min-width: 1024px) {
            .container { padding-left: 2rem; padding-right: 2rem; }
        }
        /* Header */
        .site-header { background: #ffffff; border-bottom: 1px solid #e2e8f0; position: sticky; top: 0; z-index: 100; box-shadow: 0 1px 8px rgba(0,0,0,0.04); }
        .header-brand-row { display: flex; align-items: center; justify-content: space-between; padding: 0.85rem 0; }
        .header-logo { display: flex; align-items: center; gap: 0.5rem; font-weight: 700; font-size: 1.35rem; color: #1e3a5f; letter-spacing: -0.01em; transition: opacity 0.2s; }
        .header-logo:hover { opacity: 0.82; }
        .logo-icon { display: inline-flex; align-items: center; justify-content: center; width: 2.2rem; height: 2.2rem; background: linear-gradient(135deg, #3b82f6, #0d9488); color: #fff; border-radius: 0.55rem; font-weight: 800; font-size: 1.1rem; flex-shrink: 0; }
        .header-brand-actions { display: flex; align-items: center; gap: 0.75rem; }
        .btn-header-cta { display: inline-flex; align-items: center; gap: 0.4rem; padding: 0.55rem 1.2rem; background: #1e3a5f; color: #fff; border-radius: var(--radius-btn); font-weight: 600; font-size: 0.9rem; transition: all 0.22s ease; box-shadow: var(--shadow-btn); white-space: nowrap; }
        .btn-header-cta:hover { background: #0f2744; transform: translateY(-1px); box-shadow: 0 4px 14px rgba(30,58,95,0.3); }
        .header-channel-row { display: flex; align-items: center; gap: 0.35rem; padding: 0.5rem 0 0.75rem; flex-wrap: wrap; border-top: 1px solid #f1f5f9; }
        .nav-channel-link { display: inline-flex; align-items: center; gap: 0.4rem; padding: 0.45rem 0.9rem; border-radius: 2rem; font-size: 0.9rem; font-weight: 500; color: #475569; transition: all 0.2s ease; white-space: nowrap; background: transparent; }
        .nav-channel-link:hover { background: #f1f5f9; color: #1e293b; }
        .nav-channel-link.active { background: #eff6ff; color: #1e3a5f; font-weight: 600; }
        .nav-dot { display: inline-block; width: 0.45rem; height: 0.45rem; border-radius: 50%; flex-shrink: 0; }
        @media (max-width: 768px) {
            .header-brand-row { padding: 0.7rem 0; }
            .header-logo { font-size: 1.15rem; }
            .logo-icon { width: 1.8rem; height: 1.8rem; font-size: 0.95rem; }
            .btn-header-cta { padding: 0.45rem 0.9rem; font-size: 0.8rem; }
            .header-channel-row { gap: 0.25rem; padding: 0.4rem 0 0.6rem; overflow-x: auto; -webkit-overflow-scrolling: touch; flex-wrap: nowrap; }
            .nav-channel-link { font-size: 0.8rem; padding: 0.4rem 0.7rem; flex-shrink: 0; }
        }
        /* Article Banner */
        .article-banner { background: linear-gradient(160deg, #1e3a5f 0%, #1a3557 30%, #0f2744 100%); padding: 2.5rem 0 2rem; position: relative; overflow: hidden; }
        .article-banner::before { content: ''; position: absolute; inset: 0; background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat; opacity: 0.12; pointer-events: none; }
        .article-banner .container { position: relative; z-index: 1; }
        .breadcrumb { display: flex; align-items: center; gap: 0.45rem; flex-wrap: wrap; font-size: 0.85rem; color: rgba(255,255,255,0.75); margin-bottom: 0.75rem; }
        .breadcrumb a { color: rgba(255,255,255,0.85); transition: color 0.2s; }
        .breadcrumb a:hover { color: #ffffff; text-decoration: underline; }
        .breadcrumb .sep { color: rgba(255,255,255,0.45); font-size: 0.7rem; }
        /* Article Main */
        .article-main { padding: 2.5rem 0 3rem; }
        .article-container { max-width: var(--max-content-width); margin: 0 auto; }
        .article-header-card { background: #ffffff; border-radius: var(--radius-card); padding: 2rem 2.25rem; box-shadow: var(--shadow-card); margin-top: -3.5rem; position: relative; z-index: 2; border: 1px solid #e8ecf1; }
        @media (max-width: 768px) {
            .article-header-card { padding: 1.5rem 1.25rem; margin-top: -2.5rem; border-radius: 0.75rem; }
        }
        .article-category-tag { display: inline-block; padding: 0.3rem 0.85rem; background: #eff6ff; color: #3b82f6; border-radius: var(--radius-tag); font-size: 0.8rem; font-weight: 600; margin-bottom: 0.75rem; }
        .article-meta-row { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; font-size: 0.85rem; color: #64748b; margin-top: 0.6rem; }
        .article-meta-row span { display: inline-flex; align-items: center; gap: 0.3rem; }
        .article-content-area { background: #ffffff; border-radius: var(--radius-card); padding: 2.25rem 2.25rem; box-shadow: var(--shadow-card); margin-top: 1.5rem; border: 1px solid #e8ecf1; }
        @media (max-width: 768px) {
            .article-content-area { padding: 1.5rem 1.25rem; border-radius: 0.75rem; }
        }
        .article-content-area h2 { font-size: 1.5rem; font-weight: 700; color: #1e3a5f; margin: 1.8rem 0 0.8rem; padding-bottom: 0.5rem; border-bottom: 2px solid #f1f5f9; }
        .article-content-area h3 { font-size: 1.2rem; font-weight: 600; color: #1e293b; margin: 1.4rem 0 0.6rem; }
        .article-content-area p { margin-bottom: 1rem; line-height: 1.85; color: #334155; }
        .article-content-area ul, .article-content-area ol { margin: 0.8rem 0 1.2rem 1.5rem; color: #334155; }
        .article-content-area li { margin-bottom: 0.4rem; }
        .article-content-area img { border-radius: 0.6rem; margin: 1.2rem 0; box-shadow: var(--shadow-card); }
        .article-content-area blockquote { border-left: 4px solid #3b82f6; padding: 0.8rem 1.2rem; margin: 1.2rem 0; background: #f8fafc; border-radius: 0 0.5rem 0.5rem 0; color: #475569; font-style: italic; }
        .article-content-area a { color: #3b82f6; text-decoration: underline; text-underline-offset: 2px; }
        .article-content-area a:hover { color: #1e3a5f; }
        .article-content-area table { width: 100%; border-collapse: collapse; margin: 1.2rem 0; font-size: 0.9rem; }
        .article-content-area th, .article-content-area td { border: 1px solid #e2e8f0; padding: 0.65rem 0.9rem; text-align: left; }
        .article-content-area th { background: #f8fafc; font-weight: 600; color: #1e3a5f; }
        /* Not Found */
        .not-found-card { background: #ffffff; border-radius: var(--radius-card); padding: 3rem 2rem; text-align: center; box-shadow: var(--shadow-card); border: 1px solid #e8ecf1; margin-top: 1.5rem; }
        .not-found-card .icon-circle { display: inline-flex; align-items: center; justify-content: center; width: 4.5rem; height: 4.5rem; border-radius: 50%; background: #f1f5f9; color: #64748b; font-size: 2rem; margin-bottom: 1.2rem; }
        .not-found-card h2 { font-size: 1.5rem; color: #1e3a5f; margin-bottom: 0.5rem; }
        .not-found-card p { color: #64748b; margin-bottom: 1.5rem; }
        /* Related Section */
        .related-section { padding: 2rem 0 3rem; }
        .related-section .section-label { font-size: 0.85rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; color: #64748b; margin-bottom: 1rem; text-align: center; }
        .related-section .section-title { font-size: 1.6rem; font-weight: 700; color: #1e3a5f; text-align: center; margin-bottom: 1.8rem; }
        .related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; }
        @media (max-width: 900px) { .related-grid { grid-template-columns: repeat(2, 1fr); } }
        @media (max-width: 600px) { .related-grid { grid-template-columns: 1fr; } }
        .related-card { background: #ffffff; border-radius: var(--radius-card); overflow: hidden; box-shadow: var(--shadow-card); border: 1px solid #e8ecf1; transition: all 0.25s ease; display: flex; flex-direction: column; }
        .related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-elevated); }
        .related-card-img { height: 160px; overflow: hidden; }
        .related-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.35s ease; }
        .related-card:hover .related-card-img img { transform: scale(1.04); }
        .related-card-body { padding: 1.2rem 1.25rem; flex: 1; display: flex; flex-direction: column; }
        .related-card-tag { font-size: 0.75rem; font-weight: 600; color: #0d9488; margin-bottom: 0.35rem; }
        .related-card-body h3 { font-size: 1.05rem; font-weight: 700; color: #1e3a5f; margin-bottom: 0.4rem; line-height: 1.4; }
        .related-card-body p { font-size: 0.85rem; color: #64748b; line-height: 1.55; flex: 1; }
        .related-card-link { display: inline-flex; align-items: center; gap: 0.35rem; color: #3b82f6; font-weight: 600; font-size: 0.85rem; margin-top: 0.75rem; transition: color 0.2s; }
        .related-card-link:hover { color: #1e3a5f; }
        /* CTA Section */
        .cta-section { padding: 3rem 0 3.5rem; background: linear-gradient(160deg, #1e3a5f 0%, #1a3557 100%); position: relative; overflow: hidden; }
        .cta-section::before { content: ''; position: absolute; inset: 0; background: url('/assets/images/backpic/back-3.png') center/cover no-repeat; opacity: 0.08; pointer-events: none; }
        .cta-section .container { position: relative; z-index: 1; }
        .cta-inner { max-width: 640px; margin: 0 auto; text-align: center; }
        .cta-inner h2 { font-size: 1.8rem; font-weight: 700; color: #ffffff; margin-bottom: 0.75rem; }
        .cta-inner p { color: rgba(255,255,255,0.8); font-size: 1rem; margin-bottom: 1.5rem; line-height: 1.7; }
        .btn-cta-large { display: inline-flex; align-items: center; gap: 0.5rem; padding: 0.85rem 2rem; background: #ffffff; color: #1e3a5f; border-radius: var(--radius-btn); font-weight: 700; font-size: 1rem; transition: all 0.25s ease; box-shadow: 0 4px 18px rgba(0,0,0,0.2); }
        .btn-cta-large:hover { background: #f1f5f9; transform: translateY(-2px); box-shadow: 0 8px 28px rgba(0,0,0,0.3); }
        .btn-cta-large i { color: #3b82f6; }
        @media (max-width: 600px) {
            .cta-inner h2 { font-size: 1.4rem; }
            .btn-cta-large { padding: 0.7rem 1.4rem; font-size: 0.9rem; }
        }
        /* Footer */
        .site-footer { background: #0f172a; color: #cbd5e1; padding: 3rem 0 1.5rem; }
        .footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 2rem; margin-bottom: 2rem; }
        @media (max-width: 900px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
        @media (max-width: 520px) { .footer-grid { grid-template-columns: 1fr; } }
        .footer-brand-name { font-size: 1.3rem; font-weight: 700; color: #ffffff; margin-bottom: 0.5rem; }
        .footer-brand-desc { font-size: 0.85rem; line-height: 1.6; color: #94a3b8; }
        .footer-col-title { font-size: 0.8rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; color: #ffffff; margin-bottom: 0.8rem; }
        .footer-links { list-style: none; padding: 0; }
        .footer-links li { margin-bottom: 0.45rem; }
        .footer-links a, .footer-links li { color: #94a3b8; font-size: 0.85rem; transition: color 0.2s; }
        .footer-links a:hover { color: #ffffff; }
        .footer-bottom { border-top: 1px solid #1e293b; padding-top: 1.2rem; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 0.5rem; font-size: 0.8rem; color: #64748b; }
        @media (max-width: 520px) { .footer-bottom { flex-direction: column; text-align: center; } }

/* roulang page: category1 */
:root {
            --color-primary: #3b82f6;
            --color-primary-dark: #1d4ed8;
            --color-accent: #0d9488;
            --color-accent-dark: #0f766e;
            --color-warm: #d97706;
            --color-bg: #f8fafc;
            --color-surface: #ffffff;
            --color-text: #1e293b;
            --color-text-soft: #64748b;
            --color-text-muted: #94a3b8;
            --color-border: #e2e8f0;
            --color-border-light: #f1f5f9;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-2xl: 24px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08), 0 2px 6px rgba(0, 0, 0, 0.04);
            --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.10), 0 4px 12px rgba(0, 0, 0, 0.05);
            --shadow-xl: 0 20px 48px rgba(0, 0, 0, 0.12), 0 8px 20px rgba(0, 0, 0, 0.06);
            --transition-fast: 180ms ease;
            --transition-base: 260ms ease;
            --transition-slow: 380ms ease;
        }

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

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

        body {
            margin: 0;
            padding: 0;
            font-family: "Inter", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }

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

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }

        :focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 3px;
            border-radius: 4px;
        }

        /* ===== Header ===== */
        .site-header {
            background: #ffffff;
            border-bottom: 1px solid var(--color-border-light);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
            transition: box-shadow var(--transition-base);
        }

        .site-header.scrolled {
            box-shadow: var(--shadow-md);
        }

        .header-brand-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            flex-wrap: wrap;
            gap: 12px;
        }

        .header-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.35rem;
            color: var(--color-text);
            transition: color var(--transition-fast);
            flex-shrink: 0;
        }

        .header-logo:hover {
            color: var(--color-primary);
        }

        .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
            color: #ffffff;
            font-weight: 800;
            font-size: 1.25rem;
            border-radius: var(--radius-sm);
            flex-shrink: 0;
        }

        .header-brand-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .btn-header-cta {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 10px 20px;
            background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
            color: #ffffff;
            font-weight: 600;
            font-size: 0.9rem;
            border-radius: 50px;
            transition: all var(--transition-fast);
            white-space: nowrap;
            box-shadow: 0 2px 8px rgba(59, 130, 246, 0.3);
        }

        .btn-header-cta:hover {
            background: linear-gradient(135deg, var(--color-primary-dark), #1e40af);
            box-shadow: 0 4px 16px rgba(59, 130, 246, 0.45);
            transform: translateY(-1px);
            color: #ffffff;
        }

        .btn-header-cta:active {
            transform: translateY(0);
            box-shadow: 0 2px 6px rgba(59, 130, 246, 0.3);
        }

        .header-channel-row {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 8px 0 14px;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
            flex-wrap: nowrap;
        }

        .header-channel-row::-webkit-scrollbar {
            display: none;
        }

        .nav-channel-link {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 9px 18px;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--color-text-soft);
            white-space: nowrap;
            transition: all var(--transition-fast);
            border: 1.5px solid transparent;
            background: transparent;
            flex-shrink: 0;
        }

        .nav-channel-link:hover {
            color: var(--color-text);
            background: #f1f5f9;
            border-color: #e2e8f0;
        }

        .nav-channel-link.active {
            color: var(--color-primary);
            background: #eff6ff;
            border-color: #bfdbfe;
            font-weight: 600;
        }

        .nav-dot {
            display: inline-block;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            flex-shrink: 0;
        }

        /* 移动端导航汉堡按钮 */
        .mobile-nav-toggle {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
            font-size: 1.5rem;
            color: var(--color-text);
            line-height: 1;
        }

        @media (max-width: 768px) {
            .header-brand-row {
                padding: 10px 0;
            }
            .header-logo {
                font-size: 1.15rem;
            }
            .logo-icon {
                width: 34px;
                height: 34px;
                font-size: 1.05rem;
            }
            .btn-header-cta {
                padding: 8px 15px;
                font-size: 0.82rem;
                gap: 5px;
            }
            .header-channel-row {
                padding: 4px 0 10px;
                gap: 4px;
            }
            .nav-channel-link {
                padding: 7px 14px;
                font-size: 0.82rem;
                gap: 5px;
            }
            .nav-dot {
                width: 6px;
                height: 6px;
            }
            .mobile-nav-toggle {
                display: block;
            }
        }

        @media (max-width: 480px) {
            .header-brand-row {
                gap: 8px;
            }
            .btn-header-cta {
                padding: 7px 12px;
                font-size: 0.78rem;
            }
            .nav-channel-link {
                padding: 6px 11px;
                font-size: 0.76rem;
            }
        }

        /* ===== Container ===== */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        @media (min-width: 1400px) {
            .container {
                max-width: 1280px;
            }
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Section Spacing ===== */
        .section {
            padding: 72px 0;
        }

        .section-sm {
            padding: 48px 0;
        }

        .section-lg {
            padding: 96px 0;
        }

        @media (max-width: 768px) {
            .section {
                padding: 48px 0;
            }
            .section-sm {
                padding: 32px 0;
            }
            .section-lg {
                padding: 60px 0;
            }
        }

        /* ===== Hero ===== */
        .hero-category {
            position: relative;
            padding: 80px 0;
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            min-height: 460px;
            display: flex;
            align-items: center;
            overflow: hidden;
        }

        .hero-category::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.82) 0%, rgba(30, 58, 138, 0.7) 50%, rgba(15, 23, 42, 0.78) 100%);
            z-index: 1;
        }

        .hero-category-content {
            position: relative;
            z-index: 2;
            max-width: 720px;
        }

        .hero-badge {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.25);
            border-radius: 50px;
            color: #e2e8f0;
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 20px;
            letter-spacing: 0.02em;
        }

        @media (max-width: 768px) {
            .hero-category {
                padding: 56px 0;
                min-height: 360px;
            }
            .hero-category-content {
                max-width: 100%;
            }
        }

        /* ===== Cards ===== */
        .card-feature {
            background: #ffffff;
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-base);
            position: relative;
            overflow: hidden;
        }

        .card-feature::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
            opacity: 0;
            transition: opacity var(--transition-base);
        }

        .card-feature:hover {
            box-shadow: var(--shadow-lg);
            border-color: #cbd5e1;
            transform: translateY(-4px);
        }

        .card-feature:hover::before {
            opacity: 1;
        }

        .card-feature-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 52px;
            height: 52px;
            border-radius: var(--radius-md);
            font-size: 1.4rem;
            margin-bottom: 18px;
            flex-shrink: 0;
        }

        .card-scenario {
            background: #ffffff;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
        }

        .card-scenario:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
            border-color: #cbd5e1;
        }

        .card-scenario-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            flex-shrink: 0;
        }

        .card-scenario-body {
            padding: 22px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        @media (max-width: 768px) {
            .card-feature {
                padding: 24px 20px;
            }
            .card-scenario-img {
                height: 160px;
            }
            .card-scenario-body {
                padding: 18px 16px;
            }
        }

        /* ===== Step Flow ===== */
        .step-item {
            display: flex;
            gap: 18px;
            align-items: flex-start;
            padding: 20px 0;
            position: relative;
        }

        .step-item+.step-item {
            border-top: 1px dashed #e2e8f0;
        }

        .step-number {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
            color: #ffffff;
            font-weight: 700;
            font-size: 1.2rem;
            flex-shrink: 0;
        }

        @media (max-width: 768px) {
            .step-item {
                gap: 14px;
                padding: 16px 0;
            }
            .step-number {
                width: 42px;
                height: 42px;
                font-size: 1rem;
            }
        }

        /* ===== FAQ ===== */
        .faq-item {
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-fast);
            background: #ffffff;
            margin-bottom: 8px;
        }

        .faq-item:hover {
            border-color: #cbd5e1;
            box-shadow: var(--shadow-sm);
        }

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

        .faq-question:hover {
            background: #f8fafc;
        }

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

        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--color-primary);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-slow);
            padding: 0 22px;
        }

        .faq-item.open .faq-answer {
            max-height: 400px;
            padding: 0 22px 20px;
        }

        .faq-answer-inner {
            color: var(--color-text-soft);
            line-height: 1.8;
        }

        @media (max-width: 768px) {
            .faq-question {
                padding: 15px 16px;
                font-size: 0.95rem;
            }
            .faq-answer {
                padding: 0 16px;
            }
            .faq-item.open .faq-answer {
                padding: 0 16px 16px;
            }
        }

        /* ===== CTA Section ===== */
        .cta-section {
            background: linear-gradient(135deg, #1e3a8a 0%, #1d4ed8 40%, #2563eb 70%, #1e40af 100%);
            position: relative;
            overflow: hidden;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            top: -60px;
            right: -80px;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.04);
            pointer-events: none;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            bottom: -40px;
            left: -60px;
            width: 220px;
            height: 220px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.03);
            pointer-events: none;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0f172a;
            color: #cbd5e1;
            padding: 56px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 36px;
            padding-bottom: 40px;
        }

        .footer-brand-name {
            font-size: 1.3rem;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 12px;
        }

        .footer-brand-desc {
            font-size: 0.9rem;
            line-height: 1.7;
            color: #94a3b8;
            max-width: 320px;
        }

        .footer-col-title {
            font-size: 0.95rem;
            font-weight: 600;
            color: #e2e8f0;
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }

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

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

        .footer-links a {
            color: #94a3b8;
            font-size: 0.9rem;
            transition: color var(--transition-fast);
        }

        .footer-links a:hover {
            color: #ffffff;
        }

        .footer-bottom {
            border-top: 1px solid #1e293b;
            padding: 20px 0;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 0.85rem;
            color: #64748b;
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .footer-brand-desc {
                max-width: 100%;
            }
        }

        @media (max-width: 480px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== Utility ===== */
        .text-gradient {
            background: linear-gradient(135deg, #3b82f6, #0d9488);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .bg-dot-pattern {
            background-image: radial-gradient(#cbd5e1 1px, transparent 1px);
            background-size: 20px 20px;
        }

        @media (max-width: 768px) {
            .hide-mobile {
                display: none !important;
            }
        }

/* roulang page: category3 */
:root {
            --primary: #7c3aed;
            --primary-hover: #6d28d9;
            --primary-light: #ede9fe;
            --primary-soft: #f5f3ff;
            --secondary: #0f172a;
            --accent: #f59e0b;
            --bg: #f8fafc;
            --bg-white: #ffffff;
            --text: #1e293b;
            --text-soft: #64748b;
            --text-muted: #94a3b8;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius-sm: 8px;
            --radius: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow: 0 4px 16px rgba(0,0,0,0.06), 0 2px 6px rgba(0,0,0,0.04);
            --shadow-md: 0 8px 30px rgba(0,0,0,0.08), 0 3px 10px rgba(0,0,0,0.04);
            --shadow-lg: 0 16px 48px rgba(0,0,0,0.10), 0 4px 16px rgba(0,0,0,0.05);
            --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
        }

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

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

        body {
            margin: 0;
            padding: 0;
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            min-height: 100vh;
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition);
        }

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

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header ===== */
        .site-header {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: var(--shadow-sm);
        }

        .header-brand-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            gap: 20px;
        }

        .header-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.35rem;
            color: var(--secondary);
            flex-shrink: 0;
            transition: opacity var(--transition);
        }
        .header-logo:hover {
            opacity: 0.82;
        }

        .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, #7c3aed 0%, #a78bfa 100%);
            color: #fff;
            font-weight: 800;
            font-size: 1.25rem;
            flex-shrink: 0;
        }

        .header-brand-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .btn-header-cta {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 10px 20px;
            border-radius: 50px;
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            font-size: 0.9rem;
            transition: all var(--transition);
            white-space: nowrap;
            border: none;
            cursor: pointer;
        }
        .btn-header-cta:hover {
            background: var(--primary-hover);
            box-shadow: 0 4px 16px rgba(124,58,237,0.3);
            transform: translateY(-1px);
        }

        .header-channel-row {
            display: flex;
            align-items: center;
            gap: 4px;
            padding: 0 0 12px 0;
            flex-wrap: wrap;
        }

        .nav-channel-link {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 9px 18px;
            border-radius: 50px;
            font-size: 0.93rem;
            font-weight: 500;
            color: var(--text-soft);
            transition: all var(--transition);
            white-space: nowrap;
            position: relative;
        }
        .nav-channel-link:hover {
            color: var(--text);
            background: #f8fafc;
        }
        .nav-channel-link.active {
            color: var(--primary);
            background: var(--primary-soft);
            font-weight: 600;
        }

        .nav-dot {
            display: inline-block;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            flex-shrink: 0;
        }

        /* ===== Hero ===== */
        .hero-section {
            background: linear-gradient(170deg, #f5f3ff 0%, #ede9fe 30%, #f8fafc 70%, #ffffff 100%);
            padding: 64px 0 56px;
            position: relative;
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -80px;
            width: 480px;
            height: 480px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(124,58,237,0.07) 0%, transparent 70%);
            pointer-events: none;
        }
        .hero-section::after {
            content: '';
            position: absolute;
            bottom: -60px;
            left: -60px;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(167,139,250,0.06) 0%, transparent 70%);
            pointer-events: none;
        }

        .hero-inner {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
            position: relative;
            z-index: 1;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            border-radius: 50px;
            background: #fff;
            border: 1px solid var(--border);
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--primary);
            margin-bottom: 18px;
        }
        .hero-badge i {
            font-size: 0.75rem;
        }

        .hero-title {
            font-size: 2.75rem;
            font-weight: 800;
            line-height: 1.2;
            color: var(--secondary);
            margin: 0 0 16px 0;
            letter-spacing: -0.02em;
        }
        .hero-title .highlight {
            color: var(--primary);
            position: relative;
        }

        .hero-desc {
            font-size: 1.1rem;
            color: var(--text-soft);
            line-height: 1.75;
            margin: 0 0 28px 0;
            max-width: 520px;
        }

        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            align-items: center;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 28px;
            border-radius: 50px;
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            font-size: 1rem;
            transition: all var(--transition);
            border: none;
            cursor: pointer;
            white-space: nowrap;
        }
        .btn-primary:hover {
            background: var(--primary-hover);
            box-shadow: 0 8px 28px rgba(124,58,237,0.35);
            transform: translateY(-2px);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 28px;
            border-radius: 50px;
            background: #fff;
            color: var(--primary);
            font-weight: 600;
            font-size: 1rem;
            border: 2px solid var(--primary);
            transition: all var(--transition);
            cursor: pointer;
            white-space: nowrap;
        }
        .btn-outline:hover {
            background: var(--primary-soft);
            border-color: var(--primary-hover);
            color: var(--primary-hover);
            transform: translateY(-2px);
        }

        .hero-image-wrap {
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .hero-image-wrap img {
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
            max-width: 100%;
            height: auto;
        }
        .hero-float-card {
            position: absolute;
            bottom: -18px;
            left: -18px;
            background: #fff;
            border-radius: var(--radius);
            padding: 16px 20px;
            box-shadow: var(--shadow-md);
            display: flex;
            align-items: center;
            gap: 12px;
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--secondary);
        }
        .hero-float-card .float-icon {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: #ede9fe;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 1.1rem;
        }

        /* ===== Section Common ===== */
        .section {
            padding: 64px 0;
        }
        .section-header {
            text-align: center;
            margin-bottom: 44px;
        }
        .section-label {
            display: inline-block;
            padding: 6px 16px;
            border-radius: 50px;
            background: var(--primary-soft);
            color: var(--primary);
            font-weight: 600;
            font-size: 0.85rem;
            margin-bottom: 12px;
            letter-spacing: 0.02em;
        }
        .section-title {
            font-size: 2.1rem;
            font-weight: 700;
            color: var(--secondary);
            margin: 0 0 10px 0;
            letter-spacing: -0.015em;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-soft);
            margin: 0 auto;
            max-width: 600px;
            line-height: 1.7;
        }

        /* ===== Cards ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 24px;
        }
        .card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }
        .card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
            border-color: #e2e8f0;
        }
        .card-icon {
            width: 52px;
            height: 52px;
            border-radius: var(--radius);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            margin-bottom: 16px;
            flex-shrink: 0;
        }
        .card-icon.purple {
            background: #ede9fe;
            color: #7c3aed;
        }
        .card-icon.indigo {
            background: #e0e7ff;
            color: #4f46e5;
        }
        .card-icon.amber {
            background: #fef3c7;
            color: #d97706;
        }
        .card-icon.emerald {
            background: #d1fae5;
            color: #059669;
        }
        .card-icon.rose {
            background: #ffe4e6;
            color: #e11d48;
        }
        .card-icon.cyan {
            background: #cffafe;
            color: #0891b2;
        }
        .card-title {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--secondary);
            margin: 0 0 8px 0;
        }
        .card-desc {
            font-size: 0.93rem;
            color: var(--text-soft);
            line-height: 1.65;
            margin: 0;
        }

        /* ===== Feature row ===== */
        .feature-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .feature-row.reverse {
            direction: rtl;
        }
        .feature-row.reverse>* {
            direction: ltr;
        }
        .feature-image img {
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            width: 100%;
            height: auto;
        }
        .feature-content h3 {
            font-size: 1.55rem;
            font-weight: 700;
            color: var(--secondary);
            margin: 0 0 12px 0;
        }
        .feature-content p {
            color: var(--text-soft);
            line-height: 1.75;
            margin: 0 0 16px 0;
        }
        .feature-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .feature-list li {
            padding: 6px 0;
            display: flex;
            align-items: flex-start;
            gap: 10px;
            color: var(--text);
            font-size: 0.95rem;
        }
        .feature-list li i {
            color: #10b981;
            margin-top: 3px;
            flex-shrink: 0;
        }

        /* ===== Steps ===== */
        .steps-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 20px;
            position: relative;
        }
        .step-card {
            text-align: center;
            padding: 28px 18px;
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            position: relative;
            z-index: 1;
        }
        .step-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-weight: 700;
            font-size: 1.2rem;
            margin-bottom: 14px;
        }
        .step-card h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--secondary);
            margin: 0 0 6px 0;
        }
        .step-card p {
            font-size: 0.88rem;
            color: var(--text-soft);
            margin: 0;
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: #d4c4fc;
        }
        .faq-question {
            width: 100%;
            text-align: left;
            padding: 18px 22px;
            background: none;
            border: none;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            color: var(--secondary);
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            transition: color var(--transition);
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question i {
            transition: transform var(--transition);
            color: var(--text-muted);
            font-size: 0.8rem;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
        }
        .faq-answer-inner {
            padding: 0 22px 18px;
            color: var(--text-soft);
            line-height: 1.7;
            font-size: 0.93rem;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-item.open {
            border-color: #d4c4fc;
            box-shadow: var(--shadow-sm);
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(160deg, #7c3aed 0%, #5b21b6 100%);
            padding: 56px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -100px;
            right: -60px;
            width: 350px;
            height: 350px;
            border-radius: 50%;
            background: rgba(255,255,255,0.04);
            pointer-events: none;
        }
        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -80px;
            left: -40px;
            width: 280px;
            height: 280px;
            border-radius: 50%;
            background: rgba(255,255,255,0.03);
            pointer-events: none;
        }
        .cta-inner {
            position: relative;
            z-index: 1;
        }
        .cta-inner h2 {
            color: #fff;
            font-size: 2rem;
            font-weight: 700;
            margin: 0 0 12px 0;
        }
        .cta-inner p {
            color: rgba(255,255,255,0.85);
            font-size: 1.05rem;
            margin: 0 auto 28px;
            max-width: 560px;
            line-height: 1.7;
        }
        .btn-cta-light {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 15px 32px;
            border-radius: 50px;
            background: #fff;
            color: var(--primary);
            font-weight: 700;
            font-size: 1rem;
            transition: all var(--transition);
            border: none;
            cursor: pointer;
            white-space: nowrap;
        }
        .btn-cta-light:hover {
            background: #f5f3ff;
            box-shadow: 0 10px 32px rgba(0,0,0,0.2);
            transform: translateY(-2px);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--secondary);
            color: #cbd5e1;
            padding: 48px 0 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 32px;
            margin-bottom: 32px;
        }
        .footer-brand-name {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
        }
        .footer-brand-desc {
            font-size: 0.88rem;
            line-height: 1.65;
            color: #94a3b8;
            margin: 0;
        }
        .footer-col-title {
            font-weight: 600;
            color: #e2e8f0;
            margin-bottom: 12px;
            font-size: 0.95rem;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links li {
            margin-bottom: 7px;
            font-size: 0.88rem;
            color: #94a3b8;
        }
        .footer-links a {
            color: #94a3b8;
            transition: color var(--transition);
        }
        .footer-links a:hover {
            color: #fff;
        }
        .footer-bottom {
            border-top: 1px solid #334155;
            padding-top: 18px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 0.82rem;
            color: #64748b;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .hero-inner {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .hero-title {
                font-size: 2.2rem;
            }
            .hero-image-wrap {
                order: -1;
                max-width: 480px;
                margin: 0 auto;
            }
            .feature-row {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .feature-image {
                max-width: 480px;
                margin: 0 auto;
            }
            .section-title {
                font-size: 1.75rem;
            }
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
            .header-brand-row {
                flex-wrap: wrap;
                gap: 10px;
            }
            .header-logo {
                font-size: 1.15rem;
            }
            .logo-icon {
                width: 34px;
                height: 34px;
                font-size: 1rem;
            }
            .btn-header-cta {
                padding: 8px 16px;
                font-size: 0.82rem;
            }
            .header-channel-row {
                gap: 2px;
                overflow-x: auto;
                -webkit-overflow-scrolling: touch;
                flex-wrap: nowrap;
                padding-bottom: 8px;
            }
            .nav-channel-link {
                padding: 7px 13px;
                font-size: 0.82rem;
                flex-shrink: 0;
            }
            .hero-section {
                padding: 40px 0 36px;
            }
            .hero-title {
                font-size: 1.7rem;
            }
            .hero-desc {
                font-size: 0.95rem;
            }
            .hero-actions {
                flex-direction: column;
                gap: 10px;
            }
            .btn-primary,
            .btn-outline {
                width: 100%;
                justify-content: center;
                padding: 12px 20px;
                font-size: 0.9rem;
            }
            .hero-float-card {
                position: relative;
                bottom: auto;
                left: auto;
                margin-top: 16px;
                justify-content: center;
            }
            .section {
                padding: 40px 0;
            }
            .section-title {
                font-size: 1.45rem;
            }
            .section-subtitle {
                font-size: 0.9rem;
            }
            .card-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .steps-container {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .step-card {
                padding: 20px 14px;
            }
            .step-number {
                width: 38px;
                height: 38px;
                font-size: 1rem;
            }
            .cta-inner h2 {
                font-size: 1.5rem;
            }
            .cta-inner p {
                font-size: 0.9rem;
            }
            .btn-cta-light {
                padding: 13px 24px;
                font-size: 0.9rem;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 6px;
            }
            .faq-question {
                font-size: 0.9rem;
                padding: 14px 16px;
            }
            .faq-answer-inner {
                padding: 0 16px 14px;
                font-size: 0.85rem;
            }
        }

        @media (max-width: 480px) {
            .hero-title {
                font-size: 1.4rem;
            }
            .hero-desc {
                font-size: 0.88rem;
            }
            .section-title {
                font-size: 1.25rem;
            }
            .steps-container {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .card {
                padding: 20px 16px;
            }
            .card-title {
                font-size: 1rem;
            }
            .feature-content h3 {
                font-size: 1.2rem;
            }
        }

        @media (min-width: 1400px) {
            .container {
                max-width: 1280px;
            }
        }

/* roulang page: category2 */
:root {
            --color-primary: #d97706;
            --color-primary-dark: #b45309;
            --color-primary-light: #fbbf24;
            --color-primary-bg: #fffbeb;
            --color-accent: #0d9488;
            --color-accent-dark: #0f766e;
            --color-surface: #ffffff;
            --color-surface-alt: #f9fafb;
            --color-surface-dark: #1f2937;
            --color-text: #1f2937;
            --color-text-soft: #6b7280;
            --color-text-light: #9ca3af;
            --color-border: #e5e7eb;
            --color-border-light: #f3f4f6;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.08), 0 2px 6px rgba(0, 0, 0, 0.05);
            --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.10), 0 4px 10px rgba(0, 0, 0, 0.06);
            --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.12), 0 8px 20px rgba(0, 0, 0, 0.06);
            --transition-fast: 0.2s ease;
            --transition-normal: 0.3s ease;
            --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        }

        *,
        *::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: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            line-height: 1.7;
            color: var(--color-text);
            background-color: #fafafa;
            font-size: 16px;
            overflow-x: hidden;
        }

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

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast);
        }

        button {
            cursor: pointer;
            font-family: inherit;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        @media (min-width: 1280px) {
            .container {
                max-width: 1240px;
            }
        }

        /* ========== Header / Navigation ========== */
        .site-header {
            background: #ffffff;
            border-bottom: 1px solid var(--color-border-light);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 1px 6px rgba(0, 0, 0, 0.04);
        }

        .header-brand-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 14px;
            padding-bottom: 10px;
        }

        .header-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.35rem;
            color: var(--color-text);
            letter-spacing: -0.3px;
            transition: opacity var(--transition-fast);
        }

        .header-logo:hover {
            opacity: 0.82;
        }

        .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
            color: #ffffff;
            border-radius: var(--radius-sm);
            font-weight: 800;
            font-size: 1.2rem;
            letter-spacing: 0;
            flex-shrink: 0;
        }

        .btn-header-cta {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 9px 18px;
            background: var(--color-primary);
            color: #ffffff;
            border-radius: 24px;
            font-weight: 600;
            font-size: 0.9rem;
            letter-spacing: 0.2px;
            transition: all var(--transition-fast);
            white-space: nowrap;
            border: none;
        }

        .btn-header-cta:hover {
            background: var(--color-primary-dark);
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
        }

        .header-channel-row {
            display: flex;
            align-items: center;
            gap: 6px;
            padding-bottom: 12px;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }

        .header-channel-row::-webkit-scrollbar {
            display: none;
        }

        .nav-channel-link {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 8px 16px;
            border-radius: 22px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--color-text-soft);
            background: #f9fafb;
            transition: all var(--transition-fast);
            white-space: nowrap;
            flex-shrink: 0;
            border: 1px solid transparent;
        }

        .nav-channel-link:hover {
            color: var(--color-text);
            background: #f3f4f6;
            border-color: #e5e7eb;
        }

        .nav-channel-link.active {
            color: var(--color-primary-dark);
            background: #fef3c7;
            font-weight: 600;
            border-color: #fcd34d;
        }

        .nav-dot {
            display: inline-block;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            flex-shrink: 0;
        }

        @media (max-width: 768px) {
            .header-brand-row {
                padding-top: 10px;
                padding-bottom: 8px;
            }

            .header-logo {
                font-size: 1.15rem;
                gap: 7px;
            }

            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 1rem;
                border-radius: 6px;
            }

            .btn-header-cta {
                padding: 7px 14px;
                font-size: 0.8rem;
                gap: 5px;
                border-radius: 20px;
            }

            .nav-channel-link {
                padding: 6px 12px;
                font-size: 0.8rem;
                gap: 5px;
                border-radius: 18px;
            }

            .nav-dot {
                width: 6px;
                height: 6px;
            }
        }

        @media (max-width: 480px) {
            .header-brand-row {
                flex-wrap: wrap;
                gap: 8px;
            }

            .btn-header-cta {
                padding: 6px 12px;
                font-size: 0.75rem;
            }

            .nav-channel-link {
                padding: 5px 10px;
                font-size: 0.75rem;
                border-radius: 16px;
            }
        }

        /* ========== Hero ========== */
        .hero-category {
            position: relative;
            background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            min-height: 480px;
            display: flex;
            align-items: center;
            overflow: hidden;
        }

        .hero-category::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(31, 41, 55, 0.88) 0%, rgba(31, 41, 55, 0.72) 40%, rgba(217, 119, 6, 0.55) 100%);
            z-index: 1;
        }

        .hero-category-content {
            position: relative;
            z-index: 2;
            color: #ffffff;
            padding: 60px 0;
        }

        .hero-badge {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(255, 255, 255, 0.18);
            border: 1px solid rgba(255, 255, 255, 0.3);
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 500;
            letter-spacing: 0.5px;
            margin-bottom: 16px;
            backdrop-filter: blur(4px);
        }

        .hero-category h1 {
            font-size: 2.8rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            line-height: 1.2;
            margin-bottom: 16px;
        }

        .hero-category .hero-subtitle {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.9);
            max-width: 620px;
            line-height: 1.7;
            margin-bottom: 28px;
        }

        .btn-hero-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 28px;
            background: var(--color-primary);
            color: #ffffff;
            border-radius: 28px;
            font-weight: 700;
            font-size: 1rem;
            transition: all var(--transition-normal);
            border: none;
            letter-spacing: 0.3px;
        }

        .btn-hero-primary:hover {
            background: #f59e0b;
            transform: translateY(-2px);
            box-shadow: 0 12px 28px rgba(217, 119, 6, 0.35);
        }

        .btn-hero-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 28px;
            background: rgba(255, 255, 255, 0.15);
            color: #ffffff;
            border-radius: 28px;
            font-weight: 600;
            font-size: 1rem;
            transition: all var(--transition-normal);
            border: 1px solid rgba(255, 255, 255, 0.35);
            letter-spacing: 0.3px;
            backdrop-filter: blur(4px);
        }

        .btn-hero-secondary:hover {
            background: rgba(255, 255, 255, 0.25);
            border-color: rgba(255, 255, 255, 0.55);
            transform: translateY(-2px);
        }

        @media (max-width: 768px) {
            .hero-category {
                min-height: 380px;
            }

            .hero-category h1 {
                font-size: 2rem;
            }

            .hero-category .hero-subtitle {
                font-size: 1rem;
            }

            .hero-category-content {
                padding: 40px 0;
            }

            .btn-hero-primary,
            .btn-hero-secondary {
                padding: 11px 22px;
                font-size: 0.9rem;
                border-radius: 24px;
            }
        }

        @media (max-width: 480px) {
            .hero-category {
                min-height: 340px;
            }

            .hero-category h1 {
                font-size: 1.6rem;
            }

            .hero-category .hero-subtitle {
                font-size: 0.9rem;
            }

            .hero-badge {
                font-size: 0.75rem;
                padding: 5px 12px;
            }

            .btn-hero-primary,
            .btn-hero-secondary {
                width: 100%;
                justify-content: center;
                padding: 12px 20px;
                font-size: 0.85rem;
            }

            .hero-buttons {
                flex-direction: column;
                gap: 10px;
            }
        }

        /* ========== Section Styles ========== */
        .section {
            padding: 70px 0;
        }

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

        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }

        .section-label {
            display: inline-block;
            padding: 5px 14px;
            background: #fef3c7;
            color: var(--color-primary-dark);
            border-radius: 16px;
            font-size: 0.82rem;
            font-weight: 600;
            letter-spacing: 0.4px;
            margin-bottom: 12px;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--color-text);
            letter-spacing: -0.3px;
            margin-bottom: 10px;
        }

        .section-desc {
            font-size: 1.05rem;
            color: var(--color-text-soft);
            max-width: 600px;
            margin: 0 auto;
        }

        @media (max-width: 768px) {
            .section {
                padding: 48px 0;
            }

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

            .section-desc {
                font-size: 0.95rem;
            }

            .section-header {
                margin-bottom: 32px;
            }
        }

        /* ========== Service Cards ========== */
        .service-card {
            background: #ffffff;
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-normal);
            position: relative;
            overflow: hidden;
            height: 100%;
        }

        .service-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-xl);
            border-color: #fcd34d;
        }

        .service-card-icon {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            margin-bottom: 18px;
            flex-shrink: 0;
        }

        .service-card-icon.amber {
            background: #fef3c7;
            color: #d97706;
        }

        .service-card-icon.teal {
            background: #ccfbf1;
            color: #0d9488;
        }

        .service-card-icon.blue {
            background: #dbeafe;
            color: #2563eb;
        }

        .service-card-icon.purple {
            background: #ede9fe;
            color: #7c3aed;
        }

        .service-card-icon.rose {
            background: #ffe4e6;
            color: #e11d48;
        }

        .service-card-icon.emerald {
            background: #d1fae5;
            color: #059669;
        }

        .service-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 8px;
            letter-spacing: -0.2px;
        }

        .service-card p {
            font-size: 0.9rem;
            color: var(--color-text-soft);
            line-height: 1.65;
            margin-bottom: 0;
        }

        .service-card .card-tag {
            display: inline-block;
            padding: 3px 10px;
            background: #f9fafb;
            color: var(--color-text-light);
            border-radius: 10px;
            font-size: 0.75rem;
            margin-top: 12px;
            border: 1px solid var(--color-border-light);
        }

        @media (max-width: 768px) {
            .service-card {
                padding: 24px 18px;
                border-radius: var(--radius-md);
            }

            .service-card-icon {
                width: 42px;
                height: 42px;
                font-size: 1.2rem;
                border-radius: 10px;
                margin-bottom: 14px;
            }

            .service-card h3 {
                font-size: 1.05rem;
            }
        }

        /* ========== Process / Steps ========== */
        .process-step {
            display: flex;
            gap: 20px;
            align-items: flex-start;
            padding: 20px 0;
        }

        .process-step-number {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
            color: #ffffff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.2rem;
            flex-shrink: 0;
            box-shadow: 0 4px 12px rgba(217, 119, 6, 0.3);
        }

        .process-step-content h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 4px;
        }

        .process-step-content p {
            font-size: 0.9rem;
            color: var(--color-text-soft);
            line-height: 1.6;
            margin: 0;
        }

        .process-connector {
            width: 3px;
            height: 32px;
            background: #fcd34d;
            margin-left: 22px;
            border-radius: 2px;
        }

        @media (max-width: 768px) {
            .process-step-number {
                width: 38px;
                height: 38px;
                font-size: 1rem;
            }

            .process-connector {
                margin-left: 17px;
                height: 24px;
            }
        }

        /* ========== Feature Image Card ========== */
        .feature-card-img {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            transition: all var(--transition-normal);
        }

        .feature-card-img:hover {
            box-shadow: var(--shadow-xl);
            transform: translateY(-3px);
        }

        .feature-card-img img {
            width: 100%;
            height: 240px;
            object-fit: cover;
        }

        .feature-card-body {
            padding: 20px 22px;
            background: #ffffff;
        }

        .feature-card-body h4 {
            font-weight: 700;
            font-size: 1.05rem;
            margin-bottom: 6px;
            color: var(--color-text);
        }

        .feature-card-body p {
            font-size: 0.88rem;
            color: var(--color-text-soft);
            line-height: 1.6;
            margin: 0;
        }

        @media (max-width: 768px) {
            .feature-card-img img {
                height: 180px;
            }
        }

        /* ========== Stat Block ========== */
        .stat-item {
            text-align: center;
            padding: 24px 16px;
        }

        .stat-number {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--color-primary);
            letter-spacing: -0.5px;
            line-height: 1;
        }

        .stat-label {
            font-size: 0.9rem;
            color: var(--color-text-soft);
            margin-top: 6px;
        }

        @media (max-width: 768px) {
            .stat-number {
                font-size: 2rem;
            }

            .stat-label {
                font-size: 0.8rem;
            }
        }

        /* ========== FAQ ========== */
        .faq-item {
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            background: #ffffff;
            overflow: hidden;
            transition: all var(--transition-fast);
        }

        .faq-item:hover {
            border-color: #fcd34d;
        }

        .faq-question {
            width: 100%;
            text-align: left;
            padding: 18px 22px;
            background: none;
            border: none;
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-text);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            letter-spacing: -0.1px;
            transition: color var(--transition-fast);
        }

        .faq-question:hover {
            color: var(--color-primary-dark);
        }

        .faq-answer {
            padding: 0 22px 18px;
            font-size: 0.92rem;
            color: var(--color-text-soft);
            line-height: 1.7;
            display: none;
        }

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

        .faq-item.open {
            border-color: #fcd34d;
            box-shadow: var(--shadow-sm);
        }

        .faq-icon {
            font-size: 1rem;
            transition: transform var(--transition-fast);
            color: var(--color-text-light);
            flex-shrink: 0;
        }

        .faq-item.open .faq-icon {
            transform: rotate(180deg);
            color: var(--color-primary);
        }

        @media (max-width: 768px) {
            .faq-question {
                padding: 14px 16px;
                font-size: 0.92rem;
            }

            .faq-answer {
                padding: 0 16px 14px;
                font-size: 0.85rem;
            }
        }

        /* ========== CTA Section ========== */
        .cta-section {
            background: linear-gradient(135deg, #1f2937 0%, #374151 50%, #1f2937 100%);
            padding: 64px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -120px;
            width: 350px;
            height: 350px;
            background: radial-gradient(circle, rgba(217, 119, 6, 0.2) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -60px;
            left: -80px;
            width: 280px;
            height: 280px;
            background: radial-gradient(circle, rgba(251, 191, 36, 0.15) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-inner {
            position: relative;
            z-index: 2;
            text-align: center;
            color: #ffffff;
        }

        .cta-inner h2 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }

        .cta-inner p {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.8);
            max-width: 560px;
            margin: 0 auto 28px;
            line-height: 1.6;
        }

        .btn-cta-large {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            background: var(--color-primary);
            color: #ffffff;
            border-radius: 30px;
            font-weight: 700;
            font-size: 1.05rem;
            transition: all var(--transition-normal);
            border: none;
            letter-spacing: 0.3px;
        }

        .btn-cta-large:hover {
            background: #f59e0b;
            transform: translateY(-3px);
            box-shadow: 0 16px 36px rgba(217, 119, 6, 0.4);
        }

        @media (max-width: 768px) {
            .cta-section {
                padding: 44px 0;
            }

            .cta-inner h2 {
                font-size: 1.5rem;
            }

            .cta-inner p {
                font-size: 0.9rem;
            }

            .btn-cta-large {
                padding: 12px 26px;
                font-size: 0.95rem;
                border-radius: 26px;
            }
        }

        /* ========== Footer ========== */
        .site-footer {
            background: #1f2937;
            color: #d1d5db;
            padding: 50px 0 24px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1.2fr;
            gap: 36px;
            margin-bottom: 36px;
        }

        .footer-brand-name {
            font-size: 1.3rem;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 10px;
            letter-spacing: -0.2px;
        }

        .footer-brand-desc {
            font-size: 0.88rem;
            color: #9ca3af;
            line-height: 1.7;
            margin: 0;
        }

        .footer-col-title {
            font-size: 0.95rem;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 14px;
            letter-spacing: 0.1px;
        }

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

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

        .footer-links a {
            font-size: 0.88rem;
            color: #9ca3af;
            transition: color var(--transition-fast);
        }

        .footer-links a:hover {
            color: #fbbf24;
        }

        .footer-bottom {
            border-top: 1px solid #374151;
            padding-top: 18px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 10px;
            font-size: 0.82rem;
            color: #6b7280;
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }

            .site-footer {
                padding: 36px 0 20px;
            }
        }

        @media (max-width: 480px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 22px;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 6px;
            }
        }

        /* ========== Utility ========== */
        .text-primary {
            color: var(--color-primary);
        }

        .bg-primary-soft {
            background: #fef3c7;
        }

        .highlight-underline {
            background: linear-gradient(180deg, transparent 60%, #fcd34d 60%);
            padding: 0 4px;
        }

        @media (max-width: 768px) {
            .mobile-stack {
                flex-direction: column !important;
            }
        }

        .fade-in-up {
            animation: fadeInUp 0.6s ease forwards;
        }

        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }