/* roulang page: index */
:root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #dbeafe;
            --secondary: #0ea5e9;
            --accent: #f59e0b;
            --bg-light: #f8fafc;
            --bg-dark: #0f172a;
            --text-dark: #1e293b;
            --text-muted: #64748b;
            --text-light: #94a3b8;
            --border-color: #e2e8f0;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 4px 24px rgba(0,0,0,0.06);
            --shadow-lg: 0 12px 48px rgba(0,0,0,0.10);
            --shadow-hover: 0 16px 48px rgba(37,99,235,0.15);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --container-max: 1200px;
        }

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

        body {
            font-family: var(--font-sans);
            color: var(--text-dark);
            background: #ffffff;
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }

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

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

        .section-padding {
            padding: 100px 0;
        }
        @media (max-width: 768px) {
            .section-padding {
                padding: 60px 0;
            }
        }

        .section-title {
            font-size: 2.4rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.2;
            margin-bottom: 16px;
            color: var(--text-dark);
        }
        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-muted);
            max-width: 640px;
            margin: 0 auto 48px;
            line-height: 1.6;
        }
        @media (max-width: 768px) {
            .section-title {
                font-size: 1.8rem;
            }
            .section-subtitle {
                font-size: 1rem;
                margin-bottom: 32px;
            }
        }

        /* Header & Nav */
        .site-header {
            background: rgba(255,255,255,0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 1050;
            transition: var(--transition);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }
        .site-logo {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--text-dark);
            letter-spacing: -0.03em;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .site-logo i {
            color: var(--primary);
            font-size: 1.5rem;
        }
        .site-logo:hover {
            color: var(--primary);
        }
        .site-logo span {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav-main {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .nav-main a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-muted);
            transition: var(--transition);
            position: relative;
        }
        .nav-main a:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .nav-main a.active {
            color: var(--primary);
            background: var(--primary-light);
            font-weight: 600;
        }
        .nav-main a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 18px;
            right: 18px;
            height: 3px;
            background: var(--primary);
            border-radius: 2px;
        }

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text-dark);
            padding: 8px;
            cursor: pointer;
        }

        @media (max-width: 768px) {
            .nav-main {
                display: none;
                position: absolute;
                top: 72px;
                left: 0;
                right: 0;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(12px);
                flex-direction: column;
                padding: 16px 24px 24px;
                border-bottom: 1px solid var(--border-color);
                box-shadow: var(--shadow);
                gap: 2px;
            }
            .nav-main.open {
                display: flex;
            }
            .nav-main a {
                padding: 12px 16px;
                width: 100%;
                border-radius: var(--radius-sm);
            }
            .nav-main a.active::after {
                display: none;
            }
            .nav-main a.active {
                background: var(--primary-light);
            }
            .nav-toggle {
                display: block;
            }
        }

        /* Hero */
        .hero {
            position: relative;
            min-height: 80vh;
            display: flex;
            align-items: center;
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
            overflow: hidden;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.20;
            mix-blend-mode: overlay;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(37,99,235,0.15) 0%, transparent 70%),
                        radial-gradient(ellipse at 70% 50%, rgba(14,165,233,0.10) 0%, transparent 70%);
        }
        .hero .container {
            position: relative;
            z-index: 2;
            padding: 80px 24px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(37,99,235,0.15);
            border: 1px solid rgba(37,99,235,0.25);
            color: #93c5fd;
            padding: 6px 18px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 24px;
            backdrop-filter: blur(4px);
        }
        .hero-badge i {
            font-size: 0.75rem;
            color: #60a5fa;
        }
        .hero h1 {
            font-size: 3.6rem;
            font-weight: 900;
            letter-spacing: -0.03em;
            line-height: 1.15;
            color: #ffffff;
            margin-bottom: 20px;
        }
        .hero h1 span {
            background: linear-gradient(135deg, #60a5fa, #38bdf8);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero p {
            font-size: 1.2rem;
            color: #94a3b8;
            max-width: 600px;
            margin-bottom: 36px;
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
        }
        .btn-primary-custom {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            padding: 14px 36px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1.05rem;
            border: none;
            box-shadow: 0 8px 32px rgba(37,99,235,0.30);
            transition: var(--transition);
            cursor: pointer;
        }
        .btn-primary-custom:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(37,99,235,0.40);
            color: #fff;
        }
        .btn-outline-custom {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: transparent;
            color: #e2e8f0;
            padding: 14px 32px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1.05rem;
            border: 1.5px solid rgba(255,255,255,0.20);
            transition: var(--transition);
            cursor: pointer;
        }
        .btn-outline-custom:hover {
            border-color: var(--primary);
            color: #ffffff;
            background: rgba(37,99,235,0.10);
            transform: translateY(-3px);
        }
        .hero-stats {
            display: flex;
            gap: 40px;
            margin-top: 56px;
            padding-top: 40px;
            border-top: 1px solid rgba(255,255,255,0.08);
        }
        .hero-stat h3 {
            font-size: 2rem;
            font-weight: 800;
            color: #ffffff;
            margin-bottom: 2px;
        }
        .hero-stat h3 i {
            color: #60a5fa;
            font-size: 1.4rem;
            margin-right: 6px;
        }
        .hero-stat p {
            font-size: 0.9rem;
            color: #64748b;
            margin: 0;
        }
        @media (max-width: 768px) {
            .hero h1 {
                font-size: 2.2rem;
            }
            .hero p {
                font-size: 1.05rem;
            }
            .hero-stats {
                flex-wrap: wrap;
                gap: 24px;
            }
            .hero-stat h3 {
                font-size: 1.5rem;
            }
        }
        @media (max-width: 520px) {
            .hero h1 {
                font-size: 1.8rem;
            }
            .hero-actions {
                flex-direction: column;
                width: 100%;
            }
            .hero-actions .btn-primary-custom,
            .hero-actions .btn-outline-custom {
                width: 100%;
                justify-content: center;
            }
        }

        /* Features Section */
        .features-section {
            background: var(--bg-light);
        }
        .feature-card {
            background: #fff;
            border-radius: var(--radius);
            padding: 40px 32px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            height: 100%;
            text-align: center;
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary-light);
        }
        .feature-icon {
            width: 72px;
            height: 72px;
            border-radius: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 1.8rem;
            color: #fff;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
        }
        .feature-card h3 {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .feature-card p {
            color: var(--text-muted);
            font-size: 0.95rem;
            margin: 0;
        }

        /* Category Cards */
        .category-section {
            background: #fff;
        }
        .category-card {
            position: relative;
            border-radius: var(--radius);
            overflow: hidden;
            background: var(--bg-dark);
            min-height: 340px;
            display: flex;
            align-items: flex-end;
            box-shadow: var(--shadow);
            transition: var(--transition);
            border: 1px solid var(--border-color);
        }
        .category-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .category-card img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: 0.55;
            transition: var(--transition);
        }
        .category-card:hover img {
            opacity: 0.40;
            transform: scale(1.05);
        }
        .category-card-body {
            position: relative;
            z-index: 2;
            padding: 32px 28px;
            width: 100%;
            background: linear-gradient(0deg, rgba(15,23,42,0.92) 0%, rgba(15,23,42,0.20) 100%);
        }
        .category-card-body h3 {
            color: #fff;
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .category-card-body p {
            color: #94a3b8;
            font-size: 0.95rem;
            margin-bottom: 16px;
        }
        .category-card-body .btn-sm-custom {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 22px;
            border-radius: 50px;
            background: rgba(255,255,255,0.12);
            color: #fff;
            font-size: 0.85rem;
            font-weight: 500;
            border: 1px solid rgba(255,255,255,0.20);
            transition: var(--transition);
        }
        .category-card-body .btn-sm-custom:hover {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
        }

        /* Latest Posts */
        .posts-section {
            background: var(--bg-light);
        }
        .post-card {
            background: #fff;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .post-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .post-card-img {
            height: 200px;
            background: var(--bg-dark);
            position: relative;
            overflow: hidden;
        }
        .post-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .post-card:hover .post-card-img img {
            transform: scale(1.05);
        }
        .post-card-cat {
            position: absolute;
            top: 14px;
            left: 14px;
            background: rgba(37,99,235,0.90);
            backdrop-filter: blur(4px);
            color: #fff;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
        }
        .post-card-body {
            padding: 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .post-card-body h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .post-card-body h3 a {
            color: var(--text-dark);
        }
        .post-card-body h3 a:hover {
            color: var(--primary);
        }
        .post-card-body p {
            color: var(--text-muted);
            font-size: 0.9rem;
            flex: 1;
            margin-bottom: 16px;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .post-card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.8rem;
            color: var(--text-light);
            border-top: 1px solid var(--border-color);
            padding-top: 14px;
            margin-top: auto;
        }
        .post-card-meta i {
            margin-right: 4px;
        }
        .empty-posts {
            text-align: center;
            padding: 60px 20px;
            color: var(--text-muted);
            background: #fff;
            border-radius: var(--radius);
            border: 1px dashed var(--border-color);
        }
        .empty-posts i {
            font-size: 2.4rem;
            color: var(--text-light);
            margin-bottom: 16px;
        }

        /* How It Works */
        .how-section {
            background: #fff;
        }
        .step-card {
            text-align: center;
            padding: 32px 20px;
            position: relative;
        }
        .step-number {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            font-weight: 800;
            margin: 0 auto 20px;
            box-shadow: 0 8px 24px rgba(37,99,235,0.25);
        }
        .step-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .step-card p {
            color: var(--text-muted);
            font-size: 0.9rem;
            margin: 0;
        }
        .step-connector {
            display: none;
        }
        @media (min-width: 768px) {
            .step-connector {
                display: flex;
                align-items: center;
                justify-content: center;
                font-size: 1.6rem;
                color: var(--text-light);
            }
        }

        /* FAQ */
        .faq-section {
            background: var(--bg-light);
        }
        .faq-item {
            background: #fff;
            border-radius: var(--radius);
            border: 1px solid var(--border-color);
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
            box-shadow: 0 2px 12px rgba(37,99,235,0.06);
        }
        .faq-question {
            padding: 20px 28px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-weight: 600;
            font-size: 1.05rem;
            color: var(--text-dark);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            transition: var(--transition);
        }
        .faq-question i {
            color: var(--primary);
            transition: var(--transition);
            font-size: 1.1rem;
        }
        .faq-question[aria-expanded="true"] i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 28px 20px;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
        }

        /* CTA */
        .cta-section {
            background: var(--bg-dark);
            position: relative;
            overflow: hidden;
        }
        .cta-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
            text-align: center;
            padding: 80px 24px;
        }
        .cta-section h2 {
            font-size: 2.4rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
        }
        .cta-section p {
            color: #94a3b8;
            font-size: 1.1rem;
            max-width: 560px;
            margin: 0 auto 32px;
        }
        .cta-section .btn-primary-custom {
            font-size: 1.1rem;
            padding: 16px 44px;
        }
        @media (max-width: 768px) {
            .cta-section h2 {
                font-size: 1.8rem;
            }
        }

        /* Footer */
        .site-footer {
            background: #0f172a;
            border-top: 1px solid rgba(255,255,255,0.06);
            padding: 48px 0 0;
        }
        .footer-brand {
            font-size: 1.4rem;
            font-weight: 800;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 12px;
        }
        .footer-brand i {
            color: var(--primary);
        }
        .footer-brand span {
            background: linear-gradient(135deg, #60a5fa, #38bdf8);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .footer-desc {
            color: #64748b;
            font-size: 0.9rem;
            max-width: 320px;
            line-height: 1.7;
        }
        .footer-heading {
            font-size: 1rem;
            font-weight: 700;
            color: #e2e8f0;
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: #64748b;
            font-size: 0.9rem;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .footer-links a:hover {
            color: #60a5fa;
            transform: translateX(4px);
        }
        .footer-bottom {
            margin-top: 40px;
            padding: 20px 0;
            border-top: 1px solid rgba(255,255,255,0.06);
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: #475569;
        }
        .footer-bottom a {
            color: #64748b;
        }
        .footer-bottom a:hover {
            color: #60a5fa;
        }

        @media (max-width: 768px) {
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* Utility */
        .text-gradient {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .bg-alt {
            background: var(--bg-light);
        }

        .btn:focus, .form-control:focus, a:focus {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        /* Scroll animation helper */
        .fade-up {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }
        .fade-up.visible {
            opacity: 1;
            transform: translateY(0);
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #e74c3c;
            --primary-dark: #c0392b;
            --primary-light: #fadbd8;
            --secondary: #2c3e50;
            --secondary-light: #34495e;
            --accent: #f39c12;
            --accent-light: #fdebd0;
            --bg-body: #f8f9fa;
            --bg-card: #ffffff;
            --bg-dark: #1a1a2e;
            --bg-section-alt: #f0f2f5;
            --text-primary: #2c3e50;
            --text-secondary: #5d6d7e;
            --text-light: #95a5a6;
            --text-white: #ffffff;
            --border-color: #e8ecf1;
            --border-radius: 12px;
            --border-radius-sm: 8px;
            --border-radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.10);
            --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.15);
            --shadow-hover: 0 16px 48px rgba(231, 76, 60, 0.18);
            --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
            --container-max: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-sans);
            font-size: 1rem;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            padding-top: var(--header-height);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--border-radius-sm);
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
        }
        ul,
        ol {
            list-style: none;
            padding: 0;
        }
        .container {
            max-width: var(--container-max);
            padding-left: 20px;
            padding-right: 20px;
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== Header & Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            height: var(--header-height);
            background: rgba(255, 255, 255, 0.97);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 1px 12px rgba(0, 0, 0, 0.04);
            transition: var(--transition);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            flex-wrap: nowrap;
        }
        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--secondary);
            letter-spacing: -0.5px;
            flex-shrink: 0;
            transition: var(--transition);
        }
        .site-logo i {
            font-size: 1.6rem;
            color: var(--primary);
            background: var(--primary-light);
            padding: 8px;
            border-radius: var(--border-radius-sm);
            transition: var(--transition);
        }
        .site-logo:hover {
            color: var(--primary);
        }
        .site-logo:hover i {
            background: var(--primary);
            color: #fff;
            transform: scale(1.05);
        }
        .nav-main {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
            justify-content: center;
        }
        .nav-main a {
            display: inline-flex;
            align-items: center;
            padding: 8px 18px;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 50px;
            transition: var(--transition);
            position: relative;
            white-space: nowrap;
        }
        .nav-main a::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 3px;
            background: var(--primary);
            border-radius: 4px;
            transition: var(--transition);
        }
        .nav-main a:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .nav-main a:hover::after {
            width: 60%;
        }
        .nav-main a.active {
            color: var(--primary);
            background: var(--primary-light);
            font-weight: 600;
        }
        .nav-main a.active::after {
            width: 60%;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.6rem;
            color: var(--secondary);
            cursor: pointer;
            padding: 8px 12px;
            border-radius: var(--border-radius-sm);
            transition: var(--transition);
        }
        .nav-toggle:hover {
            background: var(--bg-section-alt);
            color: var(--primary);
        }

        /* ===== Page Banner ===== */
        .page-banner {
            background: linear-gradient(135deg, var(--secondary) 0%, #0f1a2e 100%);
            padding: 80px 0 60px;
            position: relative;
            overflow: hidden;
            min-height: 280px;
            display: flex;
            align-items: center;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.15;
            mix-blend-mode: overlay;
        }
        .page-banner .container {
            position: relative;
            z-index: 2;
        }
        .page-banner h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: -1px;
            margin-bottom: 16px;
            line-height: 1.2;
        }
        .page-banner h1 i {
            color: var(--accent);
            margin-right: 10px;
        }
        .page-banner p {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 640px;
            line-height: 1.7;
        }
        .page-banner .breadcrumb-custom {
            display: flex;
            gap: 10px;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .page-banner .breadcrumb-custom a {
            color: rgba(255, 255, 255, 0.75);
            text-decoration: none;
        }
        .page-banner .breadcrumb-custom a:hover {
            color: var(--accent);
        }
        .page-banner .breadcrumb-custom span {
            color: var(--accent);
        }

        /* ===== Section Common ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-section-alt);
        }
        .section-dark {
            background: var(--bg-dark);
            color: var(--text-white);
        }
        .section-title {
            font-size: 2.0rem;
            font-weight: 700;
            color: var(--secondary);
            letter-spacing: -0.5px;
            margin-bottom: 12px;
            line-height: 1.3;
        }
        .section-title i {
            color: var(--primary);
            margin-right: 8px;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 560px;
            margin-bottom: 40px;
            line-height: 1.7;
        }
        .section-dark .section-title {
            color: var(--text-white);
        }
        .section-dark .section-subtitle {
            color: rgba(255, 255, 255, 0.7);
        }
        .text-center .section-subtitle {
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== Cards ===== */
        .card-custom {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius);
            padding: 32px 28px;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
            height: 100%;
        }
        .card-custom:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: var(--primary-light);
        }
        .card-custom .card-icon {
            width: 56px;
            height: 56px;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: var(--border-radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            margin-bottom: 18px;
            transition: var(--transition);
        }
        .card-custom:hover .card-icon {
            background: var(--primary);
            color: #fff;
            transform: scale(1.05);
        }
        .card-custom h3 {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--secondary);
            margin-bottom: 10px;
        }
        .card-custom p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }
        .card-custom .badge-step {
            display: inline-block;
            background: var(--accent-light);
            color: var(--accent);
            font-weight: 700;
            font-size: 0.75rem;
            padding: 4px 12px;
            border-radius: 50px;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }

        /* ===== Buttons ===== */
        .btn-custom {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            font-size: 1rem;
            font-weight: 600;
            border-radius: 50px;
            border: none;
            transition: var(--transition);
            cursor: pointer;
            text-decoration: none;
        }
        .btn-custom-primary {
            background: var(--primary);
            color: var(--text-white);
            box-shadow: 0 4px 16px rgba(231, 76, 60, 0.30);
        }
        .btn-custom-primary:hover {
            background: var(--primary-dark);
            color: var(--text-white);
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(231, 76, 60, 0.40);
        }
        .btn-custom-outline {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }
        .btn-custom-outline:hover {
            background: var(--primary);
            color: var(--text-white);
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(231, 76, 60, 0.25);
        }
        .btn-custom-accent {
            background: var(--accent);
            color: var(--secondary);
            box-shadow: 0 4px 16px rgba(243, 156, 18, 0.30);
        }
        .btn-custom-accent:hover {
            background: #e67e22;
            color: var(--secondary);
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(243, 156, 18, 0.40);
        }
        .btn-custom-sm {
            padding: 10px 24px;
            font-size: 0.9rem;
        }

        /* ===== Badge / Tag ===== */
        .badge-tag {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary-dark);
            font-size: 0.8rem;
            font-weight: 600;
            padding: 5px 16px;
            border-radius: 50px;
            letter-spacing: 0.3px;
        }
        .badge-tag-accent {
            background: var(--accent-light);
            color: var(--accent);
        }
        .badge-tag-success {
            background: #d4edda;
            color: #155724;
        }

        /* ===== Feature / List ===== */
        .feature-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            font-size: 1rem;
            color: var(--text-primary);
            line-height: 1.6;
        }
        .feature-list li i {
            color: var(--primary);
            font-size: 1.1rem;
            margin-top: 4px;
            flex-shrink: 0;
        }
        .feature-list li strong {
            color: var(--secondary);
        }

        /* ===== Step Flow ===== */
        .step-flow {
            display: flex;
            flex-wrap: wrap;
            gap: 30px;
            justify-content: center;
            counter-reset: step;
        }
        .step-item {
            flex: 1 1 200px;
            max-width: 240px;
            text-align: center;
            position: relative;
            counter-increment: step;
        }
        .step-item::before {
            content: counter(step);
            display: block;
            width: 48px;
            height: 48px;
            background: var(--primary);
            color: #fff;
            font-size: 1.3rem;
            font-weight: 700;
            border-radius: 50%;
            line-height: 48px;
            margin: 0 auto 16px;
            box-shadow: 0 4px 16px rgba(231, 76, 60, 0.25);
        }
        .step-item h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--secondary);
            margin-bottom: 8px;
        }
        .step-item p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        .step-item:not(:last-child)::after {
            content: '→';
            position: absolute;
            right: -20px;
            top: 12px;
            font-size: 1.6rem;
            color: var(--primary-light);
            font-weight: 700;
        }
        @media (max-width: 768px) {
            .step-item:not(:last-child)::after {
                content: '↓';
                right: auto;
                top: auto;
                bottom: -20px;
                left: 50%;
                transform: translateX(-50%);
            }
            .step-item {
                max-width: 100%;
                flex: 1 1 100%;
            }
        }

        /* ===== FAQ ===== */
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius);
            padding: 24px 28px;
            margin-bottom: 16px;
            transition: var(--transition);
            cursor: pointer;
        }
        .faq-item:hover {
            border-color: var(--primary-light);
            box-shadow: var(--shadow-sm);
        }
        .faq-item .faq-question {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--secondary);
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
        }
        .faq-item .faq-question i {
            color: var(--primary);
            font-size: 1.1rem;
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item .faq-answer {
            margin-top: 14px;
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }

        /* ===== CTA Section ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            padding: 70px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .cta-section p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.88);
            max-width: 520px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }
        .cta-section .btn-custom {
            background: var(--text-white);
            color: var(--primary);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
        }
        .cta-section .btn-custom:hover {
            background: var(--accent-light);
            color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.25);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--secondary);
            color: rgba(255, 255, 255, 0.85);
            padding: 60px 0 30px;
            border-top: 4px solid var(--primary);
        }
        .site-footer .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
        }
        .site-footer .footer-brand i {
            color: var(--primary);
            background: rgba(255, 255, 255, 0.12);
            padding: 8px;
            border-radius: var(--border-radius-sm);
        }
        .site-footer .footer-desc {
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.65);
            line-height: 1.7;
            max-width: 360px;
        }
        .site-footer .footer-heading {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 10px;
        }
        .site-footer .footer-heading::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 36px;
            height: 3px;
            background: var(--primary);
            border-radius: 4px;
        }
        .site-footer .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .site-footer .footer-links a {
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.92rem;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition);
        }
        .site-footer .footer-links a i {
            font-size: 0.7rem;
            color: var(--primary);
        }
        .site-footer .footer-links a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .site-footer .footer-bottom {
            margin-top: 40px;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.10);
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
        }
        .site-footer .footer-bottom span:last-child {
            font-family: monospace;
            letter-spacing: 0.3px;
        }

        /* ===== Responsive ===== */
        @media (max-width: 992px) {
            .page-banner h1 {
                font-size: 2.1rem;
            }
            .page-banner {
                padding: 60px 0 40px;
                min-height: 220px;
            }
            .section {
                padding: 60px 0;
            }
            .section-title {
                font-size: 1.7rem;
            }
        }

        @media (max-width: 768px) {
            .nav-main {
                display: none;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 20px 24px;
                gap: 6px;
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.10);
                border-bottom: 1px solid var(--border-color);
                max-height: 80vh;
                overflow-y: auto;
            }
            .nav-main.open {
                display: flex;
            }
            .nav-main a {
                width: 100%;
                padding: 12px 18px;
                border-radius: var(--border-radius-sm);
            }
            .nav-main a::after {
                display: none;
            }
            .nav-toggle {
                display: block;
            }
            .page-banner h1 {
                font-size: 1.8rem;
            }
            .page-banner p {
                font-size: 1rem;
            }
            .page-banner {
                padding: 48px 0 32px;
                min-height: 180px;
            }
            .section {
                padding: 48px 0;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .section-subtitle {
                font-size: 0.95rem;
                margin-bottom: 28px;
            }
            .card-custom {
                padding: 24px 20px;
            }
            .cta-section h2 {
                font-size: 1.7rem;
            }
            .cta-section {
                padding: 48px 0;
            }
            .site-footer .footer-brand {
                font-size: 1.2rem;
            }
            .site-footer {
                padding: 40px 0 24px;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .page-banner h1 {
                font-size: 1.5rem;
            }
            .page-banner .breadcrumb-custom {
                font-size: 0.8rem;
                gap: 6px;
            }
            .section-title {
                font-size: 1.3rem;
            }
            .btn-custom {
                padding: 12px 28px;
                font-size: 0.9rem;
            }
            .step-item::before {
                width: 40px;
                height: 40px;
                font-size: 1.1rem;
                line-height: 40px;
            }
            .faq-item {
                padding: 18px 20px;
            }
            .faq-item .faq-question {
                font-size: 0.95rem;
            }
        }

        /* ===== Additional Utility ===== */
        .gap-section {
            height: 1px;
            background: var(--border-color);
            margin: 0 auto;
            max-width: 80px;
        }
        .shadow-hover-card {
            transition: var(--transition);
        }
        .shadow-hover-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .img-cover-round {
            border-radius: var(--border-radius);
            object-fit: cover;
            width: 100%;
            height: 220px;
        }
        @media (min-width: 768px) {
            .img-cover-round {
                height: 260px;
            }
        }

        /* ===== Table / Data ===== */
        .data-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 24px;
        }
        .data-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius);
            padding: 28px 24px;
            text-align: center;
            transition: var(--transition);
        }
        .data-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .data-item .number {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 6px;
        }
        .data-item .label {
            font-size: 0.95rem;
            color: var(--text-secondary);
            font-weight: 500;
        }

        /* ===== Image Text Row ===== */
        .img-text-row {
            display: flex;
            align-items: center;
            gap: 48px;
            flex-wrap: wrap;
        }
        .img-text-row .text-col {
            flex: 1 1 45%;
        }
        .img-text-row .img-col {
            flex: 1 1 45%;
        }
        .img-text-row .img-col img {
            border-radius: var(--border-radius);
            box-shadow: var(--shadow-md);
            width: 100%;
        }
        @media (max-width: 768px) {
            .img-text-row {
                gap: 28px;
                flex-direction: column;
            }
            .img-text-row .text-col,
            .img-text-row .img-col {
                flex: 1 1 100%;
            }
        }

/* roulang page: article */
:root {
            --primary: #6C3CF5;
            --primary-dark: #5228CC;
            --primary-light: #8B6CF7;
            --secondary: #F59E0B;
            --secondary-light: #FCD34D;
            --accent: #EC4899;
            --dark: #0F0B1E;
            --dark-alt: #1A1433;
            --gray-900: #1E1B2E;
            --gray-800: #2D2844;
            --gray-700: #4A4560;
            --gray-600: #6B6580;
            --gray-500: #8E88A0;
            --gray-400: #B0ABC0;
            --gray-300: #D1CDE0;
            --gray-200: #E8E5F0;
            --gray-100: #F4F2F8;
            --white: #FFFFFF;
            --bg-light: #FAF9FF;
            --bg-card: #FFFFFF;
            --shadow-sm: 0 2px 8px rgba(108, 60, 245, 0.08);
            --shadow-md: 0 8px 30px rgba(108, 60, 245, 0.12);
            --shadow-lg: 0 20px 60px rgba(108, 60, 245, 0.18);
            --shadow-glow: 0 0 40px rgba(108, 60, 245, 0.25);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
        }

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

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-light);
            color: var(--gray-900);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

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

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

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

        /* ===== Header / Nav ===== */
        .site-header {
            background: var(--white);
            border-bottom: 1px solid rgba(108, 60, 245, 0.08);
            padding: 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 20px rgba(108, 60, 245, 0.06);
            backdrop-filter: blur(12px);
            background: rgba(255, 255, 255, 0.96);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 24px;
        }

        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--dark);
            flex-shrink: 0;
            letter-spacing: -0.3px;
        }

        .site-logo i {
            color: var(--primary);
            font-size: 26px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .site-logo span {
            background: linear-gradient(135deg, var(--dark), var(--gray-700));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .nav-main {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .nav-main a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 15px;
            color: var(--gray-600);
            transition: var(--transition);
            position: relative;
            letter-spacing: 0.2px;
        }

        .nav-main a:hover {
            color: var(--primary);
            background: rgba(108, 60, 245, 0.06);
        }

        .nav-main a.active {
            color: var(--white);
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            box-shadow: 0 4px 15px rgba(108, 60, 245, 0.3);
        }

        .nav-main a.active:hover {
            transform: translateY(-1px);
            box-shadow: 0 6px 25px rgba(108, 60, 245, 0.4);
        }

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            color: var(--gray-700);
            cursor: pointer;
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }

        .nav-toggle:hover {
            background: rgba(108, 60, 245, 0.06);
            color: var(--primary);
        }

        /* ===== Article Hero ===== */
        .article-hero {
            position: relative;
            padding: 80px 0 60px;
            background: linear-gradient(135deg, var(--dark) 0%, var(--dark-alt) 50%, var(--gray-800) 100%);
            overflow: hidden;
            min-height: 320px;
            display: flex;
            align-items: center;
        }

        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.15;
            mix-blend-mode: overlay;
        }

        .article-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(108, 60, 245, 0.25) 0%, transparent 70%);
        }

        .article-hero .container {
            position: relative;
            z-index: 2;
        }

        .article-hero .breadcrumb-custom {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--gray-400);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }

        .article-hero .breadcrumb-custom a {
            color: var(--gray-400);
            transition: var(--transition);
        }

        .article-hero .breadcrumb-custom a:hover {
            color: var(--secondary-light);
        }

        .article-hero .breadcrumb-custom span {
            color: var(--gray-300);
        }

        .article-hero .breadcrumb-custom i {
            font-size: 10px;
            color: var(--gray-500);
        }

        .article-hero h1 {
            font-size: 38px;
            font-weight: 800;
            color: var(--white);
            line-height: 1.25;
            max-width: 900px;
            letter-spacing: -0.5px;
            margin-bottom: 16px;
        }

        .article-meta-bar {
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
            margin-top: 8px;
        }

        .article-meta-bar .badge-category {
            background: linear-gradient(135deg, var(--secondary), var(--secondary-light));
            color: var(--dark);
            padding: 4px 16px;
            border-radius: 20px;
            font-weight: 700;
            font-size: 13px;
            letter-spacing: 0.3px;
        }

        .article-meta-bar .meta-date {
            color: var(--gray-400);
            font-size: 14px;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .article-meta-bar .meta-date i {
            font-size: 14px;
            color: var(--gray-500);
        }

        /* ===== Article Content ===== */
        .article-section {
            padding: 60px 0 80px;
        }

        .article-wrapper {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 48px;
            align-items: start;
        }

        .article-main {
            background: var(--white);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            padding: 40px 44px;
            border: 1px solid var(--gray-200);
            transition: var(--transition);
        }

        .article-main:hover {
            box-shadow: var(--shadow-md);
        }

        .article-body {
            font-size: 17px;
            line-height: 1.9;
            color: var(--gray-800);
        }

        .article-body h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--dark);
            margin-top: 40px;
            margin-bottom: 16px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--gray-200);
        }

        .article-body h3 {
            font-size: 21px;
            font-weight: 700;
            color: var(--dark);
            margin-top: 32px;
            margin-bottom: 12px;
        }

        .article-body p {
            margin-bottom: 18px;
        }

        .article-body ul,
        .article-body ol {
            margin-bottom: 20px;
            padding-left: 24px;
        }

        .article-body li {
            margin-bottom: 8px;
        }

        .article-body img {
            border-radius: var(--radius-md);
            margin: 28px 0;
            box-shadow: var(--shadow-sm);
            width: 100%;
            object-fit: cover;
        }

        .article-body blockquote {
            border-left: 4px solid var(--primary);
            background: var(--gray-100);
            padding: 20px 24px;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin: 24px 0;
            font-style: italic;
            color: var(--gray-700);
        }

        .article-body a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 2px;
        }

        .article-body a:hover {
            color: var(--primary-dark);
        }

        .article-body code {
            background: var(--gray-100);
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.9em;
            color: var(--accent);
        }

        .article-body pre {
            background: var(--dark);
            color: #e8e5f0;
            padding: 24px;
            border-radius: var(--radius-md);
            overflow-x: auto;
            margin: 24px 0;
            font-size: 14px;
            line-height: 1.6;
        }

        .article-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 24px 0;
            border-radius: var(--radius-sm);
            overflow: hidden;
        }

        .article-body table th {
            background: var(--gray-100);
            font-weight: 700;
            padding: 12px 16px;
            text-align: left;
            border-bottom: 2px solid var(--gray-300);
        }

        .article-body table td {
            padding: 10px 16px;
            border-bottom: 1px solid var(--gray-200);
        }

        .article-body table tr:hover td {
            background: var(--gray-100);
        }

        .article-not-found {
            text-align: center;
            padding: 80px 20px;
        }

        .article-not-found i {
            font-size: 64px;
            color: var(--gray-400);
            margin-bottom: 24px;
        }

        .article-not-found h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--gray-700);
            margin-bottom: 12px;
        }

        .article-not-found p {
            color: var(--gray-500);
            margin-bottom: 28px;
            font-size: 17px;
        }

        .article-not-found .btn-home {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: var(--white);
            border-radius: var(--radius-md);
            font-weight: 600;
            transition: var(--transition);
            border: none;
        }

        .article-not-found .btn-home:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-glow);
        }

        /* ===== Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }

        .sidebar-card {
            background: var(--white);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            padding: 28px 24px;
            border: 1px solid var(--gray-200);
            transition: var(--transition);
        }

        .sidebar-card:hover {
            box-shadow: var(--shadow-md);
        }

        .sidebar-card h4 {
            font-size: 18px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .sidebar-card h4 i {
            color: var(--primary);
            font-size: 20px;
        }

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

        .sidebar-links li {
            border-bottom: 1px solid var(--gray-200);
            padding: 10px 0;
        }

        .sidebar-links li:last-child {
            border-bottom: none;
        }

        .sidebar-links a {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--gray-700);
            font-weight: 500;
            font-size: 15px;
            transition: var(--transition);
        }

        .sidebar-links a i {
            color: var(--primary);
            font-size: 12px;
            transition: var(--transition);
        }

        .sidebar-links a:hover {
            color: var(--primary);
            transform: translateX(4px);
        }

        .sidebar-links a:hover i {
            transform: translateX(2px);
        }

        .sidebar-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .sidebar-tags .tag {
            padding: 6px 16px;
            background: var(--gray-100);
            border-radius: 20px;
            font-size: 13px;
            font-weight: 600;
            color: var(--gray-700);
            transition: var(--transition);
            border: 1px solid transparent;
        }

        .sidebar-tags .tag:hover {
            background: var(--white);
            border-color: var(--primary);
            color: var(--primary);
            transform: translateY(-2px);
            box-shadow: var(--shadow-sm);
        }

        .sidebar-cta {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            border-color: transparent;
            color: var(--white);
            text-align: center;
        }

        .sidebar-cta h4 {
            color: var(--white);
            justify-content: center;
        }

        .sidebar-cta h4 i {
            color: var(--secondary-light);
        }

        .sidebar-cta p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 14px;
            margin-bottom: 20px;
        }

        .sidebar-cta .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            background: var(--white);
            color: var(--primary);
            border-radius: var(--radius-md);
            font-weight: 700;
            font-size: 15px;
            transition: var(--transition);
            border: none;
        }

        .sidebar-cta .btn-cta:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(255, 255, 255, 0.25);
        }

        /* ===== Related Posts ===== */
        .related-section {
            padding: 60px 0 80px;
            background: var(--white);
            border-top: 1px solid var(--gray-200);
        }

        .related-section .section-title {
            font-size: 28px;
            font-weight: 800;
            color: var(--dark);
            text-align: center;
            margin-bottom: 8px;
        }

        .related-section .section-subtitle {
            text-align: center;
            color: var(--gray-500);
            margin-bottom: 40px;
            font-size: 16px;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .related-card {
            background: var(--white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--gray-200);
            overflow: hidden;
            transition: var(--transition);
        }

        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: var(--primary-light);
        }

        .related-card .card-img {
            height: 180px;
            background: var(--gray-200);
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
        }

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

        .related-card:hover .card-img img {
            transform: scale(1.05);
        }

        .related-card .card-body {
            padding: 20px 22px 24px;
        }

        .related-card .card-body .cat-tag {
            display: inline-block;
            padding: 2px 12px;
            background: rgba(108, 60, 245, 0.08);
            color: var(--primary);
            border-radius: 12px;
            font-size: 12px;
            font-weight: 700;
            margin-bottom: 8px;
            letter-spacing: 0.3px;
        }

        .related-card .card-body h5 {
            font-size: 17px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 8px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-card .card-body p {
            font-size: 14px;
            color: var(--gray-500);
            margin-bottom: 12px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-card .card-body .date {
            font-size: 13px;
            color: var(--gray-400);
            display: flex;
            align-items: center;
            gap: 6px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--dark);
            color: var(--gray-400);
            padding: 60px 0 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }

        .site-footer .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--white);
            margin-bottom: 16px;
        }

        .site-footer .footer-brand i {
            color: var(--primary-light);
            font-size: 26px;
        }

        .site-footer .footer-desc {
            font-size: 15px;
            line-height: 1.7;
            color: var(--gray-500);
            max-width: 400px;
        }

        .site-footer .footer-heading {
            font-size: 17px;
            font-weight: 700;
            color: var(--white);
            margin-bottom: 18px;
            letter-spacing: 0.3px;
        }

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

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

        .site-footer .footer-links a {
            color: var(--gray-500);
            font-size: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition);
        }

        .site-footer .footer-links a i {
            font-size: 10px;
            color: var(--gray-600);
            transition: var(--transition);
        }

        .site-footer .footer-links a:hover {
            color: var(--secondary-light);
            transform: translateX(4px);
        }

        .site-footer .footer-links a:hover i {
            color: var(--secondary-light);
        }

        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 24px;
            margin-top: 40px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 14px;
            color: var(--gray-600);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-wrapper {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .article-sidebar {
                display: grid;
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }

            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .site-header .container {
                height: 64px;
            }

            .nav-main {
                display: none;
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                background: var(--white);
                flex-direction: column;
                padding: 16px 24px 24px;
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
                border-bottom: 2px solid var(--gray-200);
                gap: 4px;
            }

            .nav-main.open {
                display: flex;
            }

            .nav-main a {
                width: 100%;
                padding: 12px 16px;
                border-radius: var(--radius-sm);
            }

            .nav-toggle {
                display: block;
            }

            .article-hero {
                padding: 50px 0 40px;
                min-height: 240px;
            }

            .article-hero h1 {
                font-size: 26px;
            }

            .article-hero .breadcrumb-custom {
                font-size: 13px;
            }

            .article-main {
                padding: 24px 20px;
            }

            .article-body {
                font-size: 16px;
            }

            .article-body h2 {
                font-size: 22px;
            }

            .article-body h3 {
                font-size: 18px;
            }

            .article-sidebar {
                grid-template-columns: 1fr;
            }

            .related-grid {
                grid-template-columns: 1fr;
            }

            .site-footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }

            .article-meta-bar {
                gap: 12px;
            }
        }

        @media (max-width: 520px) {
            .article-hero h1 {
                font-size: 22px;
            }

            .article-main {
                padding: 16px 14px;
                border-radius: var(--radius-md);
            }

            .article-body {
                font-size: 15px;
            }

            .article-body h2 {
                font-size: 20px;
            }

            .article-body h3 {
                font-size: 17px;
            }

            .related-card .card-body {
                padding: 16px;
            }

            .site-header .container {
                padding: 0 16px;
            }

            .sidebar-card {
                padding: 20px 16px;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #6c3aff;
            --primary-dark: #4a1fbf;
            --primary-light: #8f6bff;
            --primary-gradient: linear-gradient(135deg, #6c3aff 0%, #3b82f6 100%);
            --secondary: #f59e0b;
            --secondary-light: #fbbf24;
            --accent: #10b981;
            --dark: #0b0e1a;
            --dark-soft: #13182b;
            --dark-card: #1a2040;
            --bg: #f8f7fc;
            --bg-alt: #eef0f7;
            --text: #1f2937;
            --text-light: #6b7280;
            --text-white: #f1f0ff;
            --border: #e2e0f0;
            --border-light: #f0effa;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-lg: 24px;
            --shadow: 0 8px 32px rgba(108, 58, 255, 0.10);
            --shadow-hover: 0 16px 48px rgba(108, 58, 255, 0.18);
            --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.06);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Noto Sans SC', sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font);
            color: var(--text);
            background: var(--bg);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover,
        a:focus {
            color: var(--primary-dark);
        }
        a:focus-visible {
            outline: 3px solid var(--primary-light);
            outline-offset: 2px;
            border-radius: 4px;
        }

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

        /* ===== Header / Nav ===== */
        .site-header {
            background: rgba(11, 14, 26, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(108, 58, 255, 0.15);
            padding: 0 0;
            position: sticky;
            top: 0;
            z-index: 1050;
            transition: var(--transition);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 12px;
            padding-bottom: 12px;
            flex-wrap: wrap;
        }
        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: -0.3px;
            transition: var(--transition);
            flex-shrink: 0;
        }
        .site-logo i {
            font-size: 1.8rem;
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .site-logo span {
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .site-logo:hover {
            opacity: 0.85;
            transform: scale(1.01);
        }
        .nav-toggle {
            background: none;
            border: none;
            color: #c8c0ff;
            font-size: 1.6rem;
            padding: 6px 10px;
            cursor: pointer;
            display: none;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .nav-toggle:hover {
            color: #fff;
            background: rgba(108, 58, 255, 0.15);
        }
        .nav-toggle:focus-visible {
            outline: 3px solid var(--primary-light);
            outline-offset: 2px;
        }

        .nav-main {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }
        .nav-main a {
            padding: 8px 18px;
            border-radius: 40px;
            color: rgba(255, 255, 255, 0.75);
            font-size: 0.95rem;
            font-weight: 500;
            transition: var(--transition);
            white-space: nowrap;
            position: relative;
        }
        .nav-main a:hover {
            color: #fff;
            background: rgba(108, 58, 255, 0.20);
        }
        .nav-main a.active {
            color: #fff;
            background: var(--primary-gradient);
            box-shadow: 0 4px 16px rgba(108, 58, 255, 0.35);
        }
        .nav-main a.active:hover {
            box-shadow: 0 6px 24px rgba(108, 58, 255, 0.45);
            transform: translateY(-1px);
        }
        .nav-main a:focus-visible {
            outline: 3px solid var(--primary-light);
            outline-offset: 2px;
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            padding: 100px 0 90px;
            background: var(--dark);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center center;
            background-attachment: fixed;
            overflow: hidden;
            min-height: 480px;
            display: flex;
            align-items: center;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 14, 26, 0.88) 0%, rgba(26, 32, 64, 0.78) 100%);
            z-index: 1;
        }
        .hero-section .container {
            position: relative;
            z-index: 2;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(108, 58, 255, 0.20);
            backdrop-filter: blur(6px);
            border: 1px solid rgba(108, 58, 255, 0.25);
            padding: 6px 20px;
            border-radius: 40px;
            color: #c8c0ff;
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 24px;
        }
        .hero-badge i {
            color: var(--secondary-light);
        }
        .hero-title {
            font-size: 3.2rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            letter-spacing: -0.5px;
            margin-bottom: 20px;
            max-width: 720px;
        }
        .hero-title span {
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-desc {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.7);
            max-width: 620px;
            margin-bottom: 32px;
            line-height: 1.8;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            align-items: center;
        }
        .btn-primary-custom {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 34px;
            background: var(--primary-gradient);
            color: #fff;
            font-weight: 600;
            font-size: 1rem;
            border: none;
            border-radius: 50px;
            box-shadow: 0 6px 24px rgba(108, 58, 255, 0.35);
            transition: var(--transition);
            cursor: pointer;
        }
        .btn-primary-custom:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 36px rgba(108, 58, 255, 0.45);
            color: #fff;
        }
        .btn-primary-custom:focus-visible {
            outline: 3px solid #fff;
            outline-offset: 3px;
        }
        .btn-outline-light-custom {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 12px 28px;
            background: transparent;
            color: #fff;
            font-weight: 500;
            font-size: 1rem;
            border: 2px solid rgba(255, 255, 255, 0.25);
            border-radius: 50px;
            transition: var(--transition);
            cursor: pointer;
        }
        .btn-outline-light-custom:hover {
            background: rgba(255, 255, 255, 0.10);
            border-color: rgba(255, 255, 255, 0.5);
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-outline-light-custom:focus-visible {
            outline: 3px solid #fff;
            outline-offset: 3px;
        }
        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
            margin-top: 50px;
            padding-top: 36px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }
        .hero-stat-item {
            text-align: left;
        }
        .hero-stat-number {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.3px;
        }
        .hero-stat-number i {
            color: var(--secondary-light);
            font-size: 1.4rem;
            margin-right: 6px;
        }
        .hero-stat-label {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.55);
            margin-top: 2px;
        }

        /* ===== Section通用 ===== */
        .section-padding {
            padding: 80px 0;
        }
        .section-padding-sm {
            padding: 56px 0;
        }
        .section-title {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--text);
            letter-spacing: -0.3px;
            margin-bottom: 12px;
        }
        .section-title span {
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .section-sub {
            font-size: 1.05rem;
            color: var(--text-light);
            max-width: 640px;
            margin-bottom: 40px;
            line-height: 1.7;
        }
        .text-center .section-sub {
            margin-left: auto;
            margin-right: auto;
        }
        .bg-alt {
            background: var(--bg-alt);
        }
        .bg-dark-section {
            background: var(--dark-soft);
            color: #fff;
        }
        .bg-dark-section .section-title {
            color: #fff;
        }
        .bg-dark-section .section-sub {
            color: rgba(255, 255, 255, 0.65);
        }

        /* ===== 卡片网格 ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            gap: 28px;
        }
        .card-grid-3 {
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
        }
        .card-grid-4 {
            grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
        }

        .feature-card {
            background: #fff;
            border-radius: var(--radius);
            padding: 32px 28px;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(108, 58, 255, 0.15);
        }
        .feature-card .card-icon {
            width: 56px;
            height: 56px;
            border-radius: 16px;
            background: var(--primary-gradient);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: #fff;
            margin-bottom: 18px;
            box-shadow: 0 6px 18px rgba(108, 58, 255, 0.25);
        }
        .feature-card .card-icon.gold {
            background: linear-gradient(135deg, #f59e0b, #f97316);
            box-shadow: 0 6px 18px rgba(245, 158, 11, 0.30);
        }
        .feature-card .card-icon.teal {
            background: linear-gradient(135deg, #10b981, #059669);
            box-shadow: 0 6px 18px rgba(16, 185, 129, 0.30);
        }
        .feature-card .card-icon.rose {
            background: linear-gradient(135deg, #f43f5e, #e11d48);
            box-shadow: 0 6px 18px rgba(244, 63, 94, 0.30);
        }
        .feature-card .card-icon.cyan {
            background: linear-gradient(135deg, #06b6d4, #0284c7);
            box-shadow: 0 6px 18px rgba(6, 182, 212, 0.30);
        }
        .feature-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text);
        }
        .feature-card p {
            font-size: 0.95rem;
            color: var(--text-light);
            line-height: 1.7;
            margin-bottom: 0;
        }
        .feature-card .card-tag {
            display: inline-block;
            padding: 3px 14px;
            border-radius: 40px;
            background: rgba(108, 58, 255, 0.08);
            color: var(--primary);
            font-size: 0.75rem;
            font-weight: 600;
            margin-top: 14px;
        }

        /* ===== 深色卡片 ===== */
        .dark-card {
            background: var(--dark-card);
            border: 1px solid rgba(108, 58, 255, 0.10);
            border-radius: var(--radius);
            padding: 28px 24px;
            transition: var(--transition);
        }
        .dark-card:hover {
            border-color: rgba(108, 58, 255, 0.25);
            transform: translateY(-4px);
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.30);
        }
        .dark-card .card-icon {
            font-size: 2rem;
            color: var(--primary-light);
            margin-bottom: 14px;
        }
        .dark-card h4 {
            color: #fff;
            font-size: 1.1rem;
            font-weight: 600;
            margin-bottom: 8px;
        }
        .dark-card p {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ===== 步骤流程 ===== */
        .steps-row {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 24px;
            counter-reset: step;
        }
        .step-item {
            text-align: center;
            padding: 28px 16px;
            background: #fff;
            border-radius: var(--radius);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-light);
            position: relative;
            transition: var(--transition);
        }
        .step-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow);
        }
        .step-number {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary-gradient);
            color: #fff;
            font-weight: 700;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            box-shadow: 0 4px 16px rgba(108, 58, 255, 0.25);
        }
        .step-item h4 {
            font-size: 1.05rem;
            font-weight: 600;
            margin-bottom: 8px;
        }
        .step-item p {
            font-size: 0.9rem;
            color: var(--text-light);
            margin-bottom: 0;
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: #fff;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(108, 58, 255, 0.12);
            box-shadow: var(--shadow-card);
        }
        .faq-question {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1.0rem;
            color: var(--text);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            transition: var(--transition);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            font-family: var(--font);
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question:focus-visible {
            outline: 3px solid var(--primary-light);
            outline-offset: -3px;
        }
        .faq-question i {
            color: var(--primary);
            font-size: 0.9rem;
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 24px 18px 24px;
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--dark);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            position: relative;
            padding: 80px 0;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 14, 26, 0.88) 0%, rgba(26, 32, 64, 0.80) 100%);
            z-index: 1;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-title {
            font-size: 2.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }
        .cta-desc {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.7);
            max-width: 600px;
            margin-bottom: 32px;
            line-height: 1.7;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--dark);
            border-top: 1px solid rgba(108, 58, 255, 0.08);
            padding: 60px 0 30px;
        }
        .site-footer .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
        }
        .site-footer .footer-brand i {
            font-size: 1.8rem;
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .site-footer .footer-brand span {
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .footer-desc {
            color: rgba(255, 255, 255, 0.5);
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 360px;
        }
        .footer-heading {
            color: #fff;
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-links li a {
            color: rgba(255, 255, 255, 0.5);
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition);
        }
        .footer-links li a i {
            font-size: 0.65rem;
            color: var(--primary-light);
        }
        .footer-links li a:hover {
            color: #fff;
            transform: translateX(4px);
        }
        .footer-links li a:focus-visible {
            outline: 3px solid var(--primary-light);
            outline-offset: 2px;
            border-radius: 4px;
        }
        .footer-bottom {
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.35);
        }
        .footer-bottom span {
            display: inline-block;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .hero-title {
                font-size: 2.6rem;
            }
            .section-title {
                font-size: 1.9rem;
            }
            .card-grid-3,
            .card-grid-4 {
                grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            }
        }

        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }
            .nav-main {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                padding-top: 16px;
                gap: 4px;
            }
            .nav-main.open {
                display: flex;
            }
            .nav-main a {
                padding: 12px 18px;
                border-radius: var(--radius-sm);
                text-align: center;
            }
            .site-header .container {
                padding-top: 10px;
                padding-bottom: 10px;
            }
            .hero-section {
                padding: 70px 0 60px;
                min-height: auto;
                background-attachment: scroll;
            }
            .hero-title {
                font-size: 2rem;
            }
            .hero-desc {
                font-size: 1rem;
            }
            .hero-stats {
                gap: 24px;
                margin-top: 32px;
                padding-top: 24px;
            }
            .hero-stat-number {
                font-size: 1.5rem;
            }
            .section-padding {
                padding: 56px 0;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .section-sub {
                font-size: 0.95rem;
            }
            .card-grid {
                grid-template-columns: 1fr;
            }
            .steps-row {
                grid-template-columns: 1fr 1fr;
            }
            .cta-title {
                font-size: 1.6rem;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .site-footer .row>div {
                margin-bottom: 24px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .hero-title {
                font-size: 1.6rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-actions .btn-primary-custom,
            .hero-actions .btn-outline-light-custom {
                justify-content: center;
                text-align: center;
            }
            .hero-stats {
                flex-direction: column;
                gap: 16px;
            }
            .steps-row {
                grid-template-columns: 1fr;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .faq-question {
                font-size: 0.9rem;
                padding: 14px 16px;
            }
            .faq-answer {
                padding: 0 16px 14px 16px;
                font-size: 0.88rem;
            }
            .feature-card {
                padding: 24px 20px;
            }
            .btn-primary-custom,
            .btn-outline-light-custom {
                padding: 12px 24px;
                font-size: 0.95rem;
                width: 100%;
                justify-content: center;
            }
            .cta-section {
                padding: 56px 0;
            }
            .site-footer {
                padding: 40px 0 24px;
            }
        }

        @media (min-width: 769px) {
            .nav-main {
                display: flex !important;
            }
        }