/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --c-primary: #0b0f1a;
            --c-primary-light: #141b2d;
            --c-secondary: #1f2a44;
            --c-accent: #d4a853;
            --c-accent-hover: #e8c06a;
            --c-accent-glow: rgba(212, 168, 83, 0.25);
            --c-gold-light: #f5e6c8;
            --c-orange: #e85d3a;
            --c-bg-dark: #070a12;
            --c-bg-card: #111827;
            --c-bg-card-hover: #1a2332;
            --c-text: #f0f2f5;
            --c-text-muted: #8a94a8;
            --c-text-light: #c8d0dc;
            --c-border: rgba(212, 168, 83, 0.15);
            --c-border-light: rgba(255, 255, 255, 0.06);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.45);
            --shadow-glow: 0 0 40px rgba(212, 168, 83, 0.08);
            --transition: all 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font-body: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --font-display: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --spacer: 2rem;
            --spacer-lg: 4.5rem;
            --spacer-xl: 7rem;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
        }
        body {
            font-family: var(--font-body);
            background-color: var(--c-bg-dark);
            color: var(--c-text);
            line-height: 1.7;
            font-size: 1rem;
            overflow-x: hidden;
        }
        a {
            color: var(--c-accent);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--c-accent-hover);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-family: var(--font-display);
            font-weight: 700;
            line-height: 1.25;
            color: var(--c-text);
        }
        ::selection {
            background: var(--c-accent);
            color: var(--c-primary);
        }

        /* ===== Container ===== */
        .container {
            max-width: 1200px;
            padding-left: 1.25rem;
            padding-right: 1.25rem;
            margin-left: auto;
            margin-right: auto;
        }
        .container-narrow {
            max-width: 900px;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1080;
            background: rgba(7, 10, 18, 0.88);
            backdrop-filter: blur(16px) saturate(180%);
            -webkit-backdrop-filter: blur(16px) saturate(180%);
            border-bottom: 1px solid var(--c-border-light);
            transition: var(--transition);
        }
        .site-header .navbar {
            padding: 0.6rem 0;
        }
        .site-header .navbar-brand {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--c-accent);
            letter-spacing: 0.5px;
            display: flex;
            align-items: center;
            gap: 0.6rem;
            padding: 0;
        }
        .site-header .navbar-brand i {
            font-size: 1.6rem;
            color: var(--c-accent);
        }
        .site-header .navbar-brand:hover {
            color: var(--c-accent-hover);
        }
        .site-header .nav-link {
            color: var(--c-text-light) !important;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 0.5rem 1rem !important;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            position: relative;
        }
        .site-header .nav-link:hover,
        .site-header .nav-link:focus {
            color: var(--c-accent) !important;
            background: rgba(212, 168, 83, 0.06);
        }
        .site-header .nav-link.active {
            color: var(--c-accent) !important;
            background: rgba(212, 168, 83, 0.1);
        }
        .site-header .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: var(--c-accent);
            border-radius: 2px;
        }
        .navbar-toggler {
            border: 1px solid rgba(212, 168, 83, 0.25);
            color: var(--c-accent);
            padding: 0.4rem 0.6rem;
            font-size: 1.2rem;
            border-radius: var(--radius-sm);
            background: transparent;
            transition: var(--transition);
        }
        .navbar-toggler:hover {
            border-color: var(--c-accent);
            background: rgba(212, 168, 83, 0.08);
        }
        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px var(--c-accent-glow);
            outline: none;
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 8rem 0 5rem;
            background: var(--c-primary) url('/assets/images/backpic/back-1.png') no-repeat center center / cover;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at center, rgba(11, 15, 26, 0.35) 0%, rgba(7, 10, 18, 0.85) 100%);
            z-index: 1;
        }
        .hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(7, 10, 18, 0.2) 0%, rgba(7, 10, 18, 0.7) 80%, var(--c-bg-dark) 100%);
            z-index: 1;
        }
        .hero .hero-content {
            position: relative;
            z-index: 2;
            max-width: 860px;
            margin: 0 auto;
        }
        .hero .hero-badge {
            display: inline-block;
            background: rgba(212, 168, 83, 0.12);
            border: 1px solid rgba(212, 168, 83, 0.2);
            color: var(--c-accent);
            padding: 0.35rem 1.2rem;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 500;
            letter-spacing: 1px;
            margin-bottom: 1.5rem;
            backdrop-filter: blur(4px);
        }
        .hero h1 {
            font-size: clamp(2.6rem, 8vw, 4.8rem);
            font-weight: 900;
            color: #fff;
            text-shadow: 0 4px 40px rgba(0, 0, 0, 0.5);
            letter-spacing: -0.5px;
            margin-bottom: 1rem;
        }
        .hero h1 span {
            color: var(--c-accent);
        }
        .hero .hero-sub {
            font-size: clamp(1.05rem, 2.5vw, 1.3rem);
            color: var(--c-text-light);
            max-width: 680px;
            margin: 0 auto 2.2rem;
            opacity: 0.9;
            line-height: 1.7;
        }
        .hero .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            justify-content: center;
        }
        .hero .hero-actions .btn {
            padding: 0.85rem 2.4rem;
            font-size: 1.05rem;
            font-weight: 600;
            border-radius: 50px;
            transition: var(--transition);
            border: none;
        }
        .hero .hero-actions .btn-primary {
            background: var(--c-accent);
            color: var(--c-primary);
            box-shadow: 0 8px 30px rgba(212, 168, 83, 0.3);
        }
        .hero .hero-actions .btn-primary:hover {
            background: var(--c-accent-hover);
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(212, 168, 83, 0.45);
        }
        .hero .hero-actions .btn-outline {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.25);
            backdrop-filter: blur(4px);
        }
        .hero .hero-actions .btn-outline:hover {
            border-color: var(--c-accent);
            color: var(--c-accent);
            background: rgba(212, 168, 83, 0.08);
            transform: translateY(-3px);
        }
        .hero .hero-scroll {
            position: absolute;
            bottom: 2rem;
            left: 50%;
            transform: translateX(-50%);
            z-index: 2;
            color: var(--c-text-muted);
            font-size: 0.8rem;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 0.3rem;
            animation: floatDown 2.8s ease-in-out infinite;
        }
        .hero .hero-scroll i {
            font-size: 1.2rem;
            color: var(--c-accent);
        }
        @keyframes floatDown {
            0%,
            100% {
                transform: translateX(-50%) translateY(0);
            }
            50% {
                transform: translateX(-50%) translateY(8px);
            }
        }

        /* ===== Section通用 ===== */
        .section {
            padding: var(--spacer-xl) 0;
        }
        .section-dark {
            background: var(--c-primary);
        }
        .section-darker {
            background: var(--c-bg-dark);
        }
        .section-card-bg {
            background: var(--c-primary-light);
        }
        .section-title-wrap {
            text-align: center;
            margin-bottom: 3.5rem;
        }
        .section-title-wrap .section-label {
            display: inline-block;
            color: var(--c-accent);
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 3px;
            text-transform: uppercase;
            margin-bottom: 0.5rem;
            border: 1px solid rgba(212, 168, 83, 0.2);
            padding: 0.2rem 1rem;
            border-radius: 50px;
            background: rgba(212, 168, 83, 0.05);
        }
        .section-title-wrap h2 {
            font-size: clamp(1.8rem, 4vw, 2.6rem);
            font-weight: 800;
            color: #fff;
            margin-bottom: 0.75rem;
        }
        .section-title-wrap p {
            color: var(--c-text-muted);
            max-width: 640px;
            margin: 0 auto;
            font-size: 1.05rem;
        }

        /* ===== Cards ===== */
        .card-custom {
            background: var(--c-bg-card);
            border: 1px solid var(--c-border-light);
            border-radius: var(--radius-md);
            padding: 2rem 1.5rem;
            transition: var(--transition);
            height: 100%;
            position: relative;
            overflow: hidden;
        }
        .card-custom::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, transparent, var(--c-accent), transparent);
            opacity: 0;
            transition: var(--transition);
        }
        .card-custom:hover {
            background: var(--c-bg-card-hover);
            border-color: rgba(212, 168, 83, 0.2);
            transform: translateY(-6px);
            box-shadow: var(--shadow-card), var(--shadow-glow);
        }
        .card-custom:hover::before {
            opacity: 1;
        }
        .card-custom .card-icon {
            font-size: 2.2rem;
            color: var(--c-accent);
            margin-bottom: 1.2rem;
            display: inline-block;
            background: rgba(212, 168, 83, 0.08);
            width: 60px;
            height: 60px;
            line-height: 60px;
            text-align: center;
            border-radius: var(--radius-sm);
        }
        .card-custom h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 0.6rem;
            color: #fff;
        }
        .card-custom p {
            color: var(--c-text-muted);
            font-size: 0.95rem;
            margin-bottom: 0;
        }

        /* ===== Feature Card (with image) ===== */
        .feature-card {
            background: var(--c-bg-card);
            border: 1px solid var(--c-border-light);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
            height: 100%;
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-card), var(--shadow-glow);
            border-color: rgba(212, 168, 83, 0.15);
        }
        .feature-card .feature-img {
            width: 100%;
            height: 220px;
            object-fit: cover;
            display: block;
        }
        .feature-card .feature-body {
            padding: 1.5rem;
        }
        .feature-card .feature-body h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            color: #fff;
        }
        .feature-card .feature-body p {
            color: var(--c-text-muted);
            font-size: 0.92rem;
            margin-bottom: 0;
        }
        .feature-card .feature-tag {
            display: inline-block;
            background: rgba(212, 168, 83, 0.1);
            color: var(--c-accent);
            font-size: 0.75rem;
            font-weight: 600;
            padding: 0.15rem 0.7rem;
            border-radius: 50px;
            margin-bottom: 0.6rem;
            border: 1px solid rgba(212, 168, 83, 0.1);
        }

        /* ===== Post Card (CMS) ===== */
        .post-card {
            background: var(--c-bg-card);
            border: 1px solid var(--c-border-light);
            border-radius: var(--radius-md);
            padding: 1.5rem;
            transition: var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .post-card:hover {
            background: var(--c-bg-card-hover);
            border-color: rgba(212, 168, 83, 0.15);
            transform: translateY(-4px);
            box-shadow: var(--shadow-card);
        }
        .post-card .post-category {
            display: inline-block;
            background: rgba(212, 168, 83, 0.08);
            color: var(--c-accent);
            font-size: 0.72rem;
            font-weight: 600;
            padding: 0.2rem 0.8rem;
            border-radius: 50px;
            margin-bottom: 0.7rem;
            border: 1px solid rgba(212, 168, 83, 0.1);
            align-self: flex-start;
        }
        .post-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            color: #fff;
            line-height: 1.4;
        }
        .post-card h3 a {
            color: #fff;
        }
        .post-card h3 a:hover {
            color: var(--c-accent);
        }
        .post-card .post-excerpt {
            color: var(--c-text-muted);
            font-size: 0.9rem;
            flex: 1;
            margin-bottom: 1rem;
        }
        .post-card .post-meta {
            color: var(--c-text-muted);
            font-size: 0.78rem;
            display: flex;
            gap: 1rem;
            align-items: center;
            border-top: 1px solid var(--c-border-light);
            padding-top: 0.8rem;
            margin-top: auto;
        }
        .post-card .post-meta i {
            color: var(--c-accent);
            margin-right: 0.3rem;
        }

        /* ===== Process / Steps ===== */
        .step-item {
            text-align: center;
            padding: 1.5rem 1rem;
            position: relative;
        }
        .step-item .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(212, 168, 83, 0.1);
            border: 2px solid var(--c-accent);
            color: var(--c-accent);
            font-size: 1.3rem;
            font-weight: 800;
            margin-bottom: 1rem;
            transition: var(--transition);
        }
        .step-item:hover .step-number {
            background: var(--c-accent);
            color: var(--c-primary);
            box-shadow: 0 0 30px rgba(212, 168, 83, 0.3);
            transform: scale(1.05);
        }
        .step-item h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.4rem;
        }
        .step-item p {
            color: var(--c-text-muted);
            font-size: 0.9rem;
            margin-bottom: 0;
        }
        .step-connector {
            display: none;
        }
        @media (min-width: 768px) {
            .step-connector {
                display: block;
                position: absolute;
                top: 2.8rem;
                right: -1.5rem;
                width: 3rem;
                height: 2px;
                background: linear-gradient(90deg, var(--c-accent), transparent);
                opacity: 0.3;
            }
        }

        /* ===== Stats ===== */
        .stat-item {
            text-align: center;
            padding: 1.5rem;
        }
        .stat-item .stat-number {
            font-size: clamp(2.4rem, 5vw, 3.6rem);
            font-weight: 900;
            color: var(--c-accent);
            line-height: 1.1;
            margin-bottom: 0.3rem;
        }
        .stat-item .stat-label {
            color: var(--c-text-muted);
            font-size: 0.95rem;
            font-weight: 500;
        }

        /* ===== FAQ ===== */
        .faq-item {
            background: var(--c-bg-card);
            border: 1px solid var(--c-border-light);
            border-radius: var(--radius-md);
            margin-bottom: 0.8rem;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(212, 168, 83, 0.15);
        }
        .faq-item .faq-question {
            padding: 1.2rem 1.5rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            font-size: 1rem;
            color: #fff;
            background: transparent;
            border: none;
            width: 100%;
            text-align: left;
            transition: var(--transition);
        }
        .faq-item .faq-question:hover {
            color: var(--c-accent);
        }
        .faq-item .faq-question i {
            color: var(--c-accent);
            transition: var(--transition);
            font-size: 0.9rem;
        }
        .faq-item .faq-question[aria-expanded="true"] i {
            transform: rotate(180deg);
        }
        .faq-item .faq-answer {
            padding: 0 1.5rem 1.2rem;
            color: var(--c-text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--c-primary) url('/assets/images/backpic/back-2.png') no-repeat center center / cover;
            position: relative;
            padding: var(--spacer-xl) 0;
            text-align: center;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(7, 10, 18, 0.7);
            z-index: 1;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: clamp(1.8rem, 4vw, 2.6rem);
            font-weight: 800;
            color: #fff;
            margin-bottom: 0.8rem;
        }
        .cta-section p {
            color: var(--c-text-light);
            font-size: 1.1rem;
            max-width: 600px;
            margin: 0 auto 2rem;
            opacity: 0.85;
        }
        .cta-section .btn-cta {
            background: var(--c-accent);
            color: var(--c-primary);
            padding: 1rem 3rem;
            font-size: 1.1rem;
            font-weight: 700;
            border-radius: 50px;
            border: none;
            transition: var(--transition);
            box-shadow: 0 8px 30px rgba(212, 168, 83, 0.25);
            display: inline-block;
        }
        .cta-section .btn-cta:hover {
            background: var(--c-accent-hover);
            transform: translateY(-3px);
            box-shadow: 0 14px 45px rgba(212, 168, 83, 0.4);
            color: var(--c-primary);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--c-bg-dark);
            border-top: 1px solid var(--c-border-light);
            padding: 3.5rem 0 1.5rem;
        }
        .site-footer .footer-brand {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--c-accent);
            display: flex;
            align-items: center;
            gap: 0.5rem;
            margin-bottom: 0.6rem;
        }
        .site-footer .footer-brand i {
            font-size: 1.4rem;
        }
        .site-footer .footer-desc {
            color: var(--c-text-muted);
            font-size: 0.9rem;
            max-width: 320px;
        }
        .site-footer .footer-heading {
            font-size: 0.85rem;
            font-weight: 700;
            color: #fff;
            text-transform: uppercase;
            letter-spacing: 1.5px;
            margin-bottom: 1rem;
        }
        .site-footer .footer-links a {
            display: block;
            color: var(--c-text-muted);
            font-size: 0.9rem;
            padding: 0.25rem 0;
            transition: var(--transition);
        }
        .site-footer .footer-links a:hover {
            color: var(--c-accent);
            padding-left: 4px;
        }
        .site-footer .footer-bottom {
            border-top: 1px solid var(--c-border-light);
            padding-top: 1.5rem;
            margin-top: 2.5rem;
            text-align: center;
            color: var(--c-text-muted);
            font-size: 0.82rem;
        }
        .site-footer .footer-bottom a {
            color: var(--c-accent);
        }

        /* ===== Empty state ===== */
        .empty-state {
            text-align: center;
            padding: 3rem 1rem;
            color: var(--c-text-muted);
        }
        .empty-state i {
            font-size: 2.5rem;
            color: var(--c-accent);
            opacity: 0.4;
            margin-bottom: 1rem;
        }
        .empty-state p {
            font-size: 1rem;
        }

        /* ===== Buttons ===== */
        .btn {
            font-weight: 600;
            padding: 0.6rem 1.8rem;
            border-radius: 50px;
            transition: var(--transition);
            border: none;
            font-size: 0.95rem;
        }
        .btn:focus {
            box-shadow: 0 0 0 3px var(--c-accent-glow);
            outline: none;
        }
        .btn-gold {
            background: var(--c-accent);
            color: var(--c-primary);
        }
        .btn-gold:hover {
            background: var(--c-accent-hover);
            color: var(--c-primary);
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(212, 168, 83, 0.3);
        }
        .btn-outline-gold {
            background: transparent;
            color: var(--c-accent);
            border: 2px solid var(--c-accent);
        }
        .btn-outline-gold:hover {
            background: var(--c-accent);
            color: var(--c-primary);
            transform: translateY(-2px);
        }

        /* ===== Utility ===== */
        .text-gold {
            color: var(--c-accent);
        }
        .text-muted-custom {
            color: var(--c-text-muted);
        }
        .mb-0 {
            margin-bottom: 0;
        }
        .gap-1 {
            gap: 0.5rem;
        }
        .gap-2 {
            gap: 1rem;
        }
        .gap-3 {
            gap: 1.5rem;
        }
        .mt-2 {
            margin-top: 1rem;
        }
        .mt-3 {
            margin-top: 1.5rem;
        }

        /* ===== Responsive ===== */
        @media (max-width: 991.98px) {
            .site-header .navbar-collapse {
                background: rgba(7, 10, 18, 0.98);
                backdrop-filter: blur(20px);
                border-radius: var(--radius-md);
                padding: 1rem;
                margin-top: 0.5rem;
                border: 1px solid var(--c-border-light);
            }
            .site-header .nav-link {
                padding: 0.6rem 1rem !important;
            }
            .hero {
                min-height: 70vh;
                padding: 6rem 0 3rem;
            }
            .hero h1 {
                font-size: clamp(2rem, 7vw, 3.2rem);
            }
            .section {
                padding: var(--spacer-lg) 0;
            }
            .section-title-wrap {
                margin-bottom: 2.5rem;
            }
            .step-connector {
                display: none !important;
            }
            .site-footer .footer-brand {
                justify-content: center;
            }
            .site-footer .footer-desc {
                margin: 0 auto 1.5rem;
                text-align: center;
            }
            .site-footer .footer-heading {
                text-align: center;
                margin-top: 1rem;
            }
            .site-footer .footer-links {
                text-align: center;
            }
            .site-footer .footer-links a:hover {
                padding-left: 0;
            }
        }
        @media (max-width: 767.98px) {
            .hero {
                min-height: 60vh;
                padding: 5rem 0 2.5rem;
            }
            .hero .hero-actions .btn {
                padding: 0.7rem 1.8rem;
                font-size: 0.95rem;
            }
            .card-custom {
                padding: 1.5rem 1.2rem;
            }
            .feature-card .feature-img {
                height: 180px;
            }
            .post-card {
                padding: 1.2rem;
            }
            .stat-item {
                padding: 1rem;
            }
            .cta-section .btn-cta {
                padding: 0.85rem 2rem;
                font-size: 1rem;
            }
            .section-title-wrap h2 {
                font-size: 1.6rem;
            }
        }
        @media (max-width: 520px) {
            .hero h1 {
                font-size: 1.8rem;
            }
            .hero .hero-sub {
                font-size: 0.95rem;
            }
            .hero .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .hero .hero-actions .btn {
                width: 100%;
                max-width: 260px;
            }
            .section {
                padding: 2.5rem 0;
            }
            .feature-card .feature-img {
                height: 150px;
            }
            .faq-item .faq-question {
                font-size: 0.92rem;
                padding: 1rem 1.2rem;
            }
            .faq-item .faq-answer {
                padding: 0 1.2rem 1rem;
                font-size: 0.88rem;
            }
        }

        /* ===== Scrollbar ===== */
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--c-bg-dark);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--c-secondary);
            border-radius: 10px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--c-accent);
        }

        /* ===== Navbar brand responsive ===== */
        @media (max-width: 400px) {
            .site-header .navbar-brand {
                font-size: 1.2rem;
            }
            .site-header .navbar-brand i {
                font-size: 1.2rem;
            }
        }

/* roulang page: article */
:root {
            --primary: #e63946;
            --primary-dark: #c1121f;
            --primary-light: #ff6b6b;
            --secondary: #1d3557;
            --secondary-light: #457b9d;
            --accent: #f4a261;
            --accent-glow: rgba(230, 57, 70, 0.3);
            --bg-dark: #0b0e14;
            --bg-card: #151b24;
            --bg-card-hover: #1c2430;
            --bg-section: #0f141c;
            --text-primary: #f1f3f5;
            --text-secondary: #a8b2c1;
            --text-muted: #6c7a8a;
            --border-color: #2a3440;
            --border-glow: rgba(230, 57, 70, 0.15);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-card: 0 8px 30px rgba(0,0,0,0.4);
            --shadow-glow: 0 0 40px rgba(230,57,70,0.08);
            --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
            --font-sans: 'Segoe UI', system-ui, -apple-system, sans-serif;
        }
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: var(--font-sans);
            background: var(--bg-dark);
            color: var(--text-primary);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary); }
        img { max-width: 100%; height: auto; border-radius: var(--radius-md); }
        .container { max-width: 1200px; padding: 0 20px; }

        /* Header / Nav */
        .site-header {
            background: rgba(11,14,20,0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-color);
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            padding: 0;
            transition: var(--transition);
        }
        .site-header .navbar {
            padding: 12px 0;
        }
        .navbar-brand {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--text-primary) !important;
            letter-spacing: 1px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .navbar-brand i {
            color: var(--primary);
            font-size: 1.8rem;
            filter: drop-shadow(0 0 12px var(--accent-glow));
        }
        .navbar-brand:hover i {
            transform: scale(1.08);
        }
        .navbar-toggler {
            border: 1px solid var(--border-color);
            color: var(--text-primary);
            padding: 8px 14px;
            border-radius: var(--radius-sm);
            background: transparent;
            font-size: 1.2rem;
        }
        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px var(--accent-glow);
        }
        .nav-link {
            color: var(--text-secondary) !important;
            font-weight: 500;
            padding: 8px 18px !important;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            font-size: 0.95rem;
            position: relative;
        }
        .nav-link:hover {
            color: var(--text-primary) !important;
            background: rgba(255,255,255,0.04);
        }
        .nav-link.active {
            color: var(--text-primary) !important;
            background: rgba(230,57,70,0.12);
            box-shadow: inset 0 0 0 1px var(--border-glow);
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 4px;
        }

        /* Hero Article */
        .article-hero {
            padding: 140px 0 60px;
            background: linear-gradient(160deg, var(--bg-dark) 0%, var(--bg-section) 60%, rgba(230,57,70,0.06) 100%);
            position: relative;
            overflow: hidden;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(230,57,70,0.08) 0%, transparent 70%);
            pointer-events: none;
        }
        .article-hero .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 12px 24px;
            align-items: center;
            margin-bottom: 20px;
            color: var(--text-secondary);
            font-size: 0.9rem;
        }
        .article-hero .article-meta .badge-cat {
            background: var(--primary);
            color: #fff;
            padding: 4px 16px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.5px;
        }
        .article-hero .article-meta i {
            margin-right: 6px;
            color: var(--primary-light);
        }
        .article-hero h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.25;
            color: var(--text-primary);
            margin-bottom: 16px;
            max-width: 900px;
            text-shadow: 0 2px 20px rgba(0,0,0,0.3);
        }
        .article-hero .lead {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 750px;
            line-height: 1.8;
        }
        .article-hero .article-thumb-wrap {
            margin-top: 30px;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            max-height: 480px;
            object-fit: cover;
            width: 100%;
        }

        /* Article Body */
        .article-body-section {
            padding: 60px 0 80px;
            background: var(--bg-dark);
        }
        .article-body {
            max-width: 820px;
            margin: 0 auto;
        }
        .article-body .content {
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--text-primary);
        }
        .article-body .content p {
            margin-bottom: 1.4rem;
        }
        .article-body .content h2, .article-body .content h3 {
            margin-top: 2rem;
            margin-bottom: 1rem;
            font-weight: 700;
            color: var(--text-primary);
        }
        .article-body .content h2 { font-size: 1.6rem; }
        .article-body .content h3 { font-size: 1.25rem; }
        .article-body .content ul, .article-body .content ol {
            margin-bottom: 1.4rem;
            padding-left: 1.5rem;
        }
        .article-body .content li {
            margin-bottom: 0.4rem;
        }
        .article-body .content a {
            color: var(--primary-light);
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .article-body .content a:hover {
            color: var(--primary);
        }
        .article-body .content blockquote {
            border-left: 4px solid var(--primary);
            padding: 16px 20px;
            margin: 1.5rem 0;
            background: rgba(230,57,70,0.05);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-body .content img {
            border-radius: var(--radius-md);
            margin: 1.5rem 0;
            box-shadow: var(--shadow-card);
        }
        .article-body .content pre {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 20px;
            overflow-x: auto;
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin: 1.5rem 0;
        }

        /* Article tags & share */
        .article-tags-share {
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid var(--border-color);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
        }
        .article-tags .tag {
            display: inline-block;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            padding: 4px 16px;
            border-radius: 20px;
            font-size: 0.8rem;
            color: var(--text-secondary);
            margin-right: 8px;
            transition: var(--transition);
        }
        .article-tags .tag:hover {
            border-color: var(--primary);
            color: var(--text-primary);
            background: rgba(230,57,70,0.08);
        }
        .article-share a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            color: var(--text-secondary);
            margin-left: 8px;
            transition: var(--transition);
        }
        .article-share a:hover {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }

        /* Article nav (prev/next) */
        .article-nav {
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid var(--border-color);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 16px;
        }
        .article-nav a {
            display: flex;
            align-items: center;
            gap: 12px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            padding: 14px 22px;
            border-radius: var(--radius-md);
            color: var(--text-secondary);
            transition: var(--transition);
            flex: 1;
            min-width: 200px;
            font-size: 0.9rem;
        }
        .article-nav a:hover {
            border-color: var(--border-glow);
            background: var(--bg-card-hover);
            color: var(--text-primary);
            transform: translateY(-2px);
            box-shadow: var(--shadow-glow);
        }
        .article-nav a i {
            font-size: 1.1rem;
            color: var(--primary-light);
        }
        .article-nav .nav-next {
            text-align: right;
            justify-content: flex-end;
        }

        /* Related Articles */
        .related-section {
            padding: 60px 0 80px;
            background: var(--bg-section);
        }
        .related-section .section-title {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .related-section .section-sub {
            color: var(--text-secondary);
            margin-bottom: 40px;
        }
        .related-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: var(--transition);
            height: 100%;
        }
        .related-card:hover {
            transform: translateY(-6px);
            border-color: var(--border-glow);
            box-shadow: var(--shadow-card), var(--shadow-glow);
        }
        .related-card .card-img-top {
            height: 200px;
            object-fit: cover;
            border-radius: 0;
        }
        .related-card .card-body {
            padding: 20px 22px 24px;
        }
        .related-card .card-cat {
            font-size: 0.75rem;
            color: var(--primary-light);
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.8px;
            display: block;
            margin-bottom: 6px;
        }
        .related-card .card-title {
            font-size: 1.05rem;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 8px;
            color: var(--text-primary);
        }
        .related-card .card-title a {
            color: inherit;
        }
        .related-card .card-title a:hover {
            color: var(--primary-light);
        }
        .related-card .card-text {
            font-size: 0.88rem;
            color: var(--text-secondary);
            margin-bottom: 12px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-date {
            font-size: 0.8rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 6px;
        }

        /* CTA */
        .cta-section {
            padding: 70px 0;
            background: linear-gradient(160deg, var(--bg-dark) 0%, rgba(230,57,70,0.08) 100%);
            text-align: center;
            border-top: 1px solid var(--border-color);
        }
        .cta-section h2 {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .cta-section p {
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto 28px;
            font-size: 1.05rem;
        }
        .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--primary);
            color: #fff;
            padding: 14px 40px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1.05rem;
            border: none;
            transition: var(--transition);
            box-shadow: 0 4px 24px var(--accent-glow);
        }
        .btn-cta:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-3px);
            box-shadow: 0 8px 36px var(--accent-glow);
        }
        .btn-cta i {
            font-size: 1.1rem;
        }
        .btn-outline-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--text-primary);
            padding: 12px 32px;
            border-radius: 50px;
            font-weight: 500;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            margin-left: 12px;
        }
        .btn-outline-cta:hover {
            border-color: var(--primary);
            color: var(--primary-light);
            background: rgba(230,57,70,0.06);
        }

        /* Footer */
        .site-footer {
            background: var(--bg-section);
            border-top: 1px solid var(--border-color);
            padding: 60px 0 30px;
        }
        .footer-brand {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 12px;
        }
        .footer-brand i {
            color: var(--primary);
            font-size: 1.6rem;
        }
        .footer-desc {
            color: var(--text-secondary);
            font-size: 0.9rem;
            max-width: 320px;
            line-height: 1.7;
        }
        .footer-heading {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 14px;
            letter-spacing: 0.5px;
        }
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-links a {
            color: var(--text-secondary);
            font-size: 0.88rem;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--primary-light);
            padding-left: 4px;
        }
        .footer-bottom {
            margin-top: 40px;
            padding-top: 20px;
            border-top: 1px solid var(--border-color);
            text-align: center;
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .footer-bottom a {
            color: var(--text-muted);
        }
        .footer-bottom a:hover {
            color: var(--primary-light);
        }
        .footer-links a i {
            width: 18px;
        }

        /* Article Not Found */
        .not-found-box {
            text-align: center;
            padding: 80px 20px;
        }
        .not-found-box i {
            font-size: 4rem;
            color: var(--text-muted);
            margin-bottom: 20px;
        }
        .not-found-box h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .not-found-box p {
            color: var(--text-secondary);
            margin-bottom: 24px;
        }
        .not-found-box .btn-home {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            padding: 12px 32px;
            border-radius: 50px;
            font-weight: 600;
            transition: var(--transition);
        }
        .not-found-box .btn-home:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .article-hero h1 { font-size: 2.2rem; }
        }
        @media (max-width: 768px) {
            .site-header .navbar { padding: 10px 0; }
            .navbar-brand { font-size: 1.3rem; }
            .navbar-brand i { font-size: 1.4rem; }
            .nav-link { padding: 10px 16px !important; }
            .article-hero { padding: 110px 0 40px; }
            .article-hero h1 { font-size: 1.6rem; }
            .article-hero .lead { font-size: 0.95rem; }
            .article-hero .article-meta { font-size: 0.8rem; gap: 8px 16px; }
            .article-body { padding: 0 4px; }
            .article-body .content { font-size: 0.95rem; }
            .related-card .card-img-top { height: 160px; }
            .cta-section h2 { font-size: 1.5rem; }
            .cta-section p { font-size: 0.95rem; }
            .footer-brand { font-size: 1.2rem; }
            .article-nav a { flex: 1 1 100%; }
            .article-tags-share { flex-direction: column; align-items: flex-start; }
        }
        @media (max-width: 520px) {
            .article-hero h1 { font-size: 1.3rem; }
            .article-hero { padding: 100px 0 30px; }
            .article-body .content { font-size: 0.9rem; }
            .btn-cta { padding: 12px 28px; font-size: 0.95rem; }
            .btn-outline-cta { padding: 10px 24px; font-size: 0.9rem; margin-left: 0; margin-top: 10px; }
            .related-card .card-title { font-size: 0.95rem; }
            .navbar-brand { font-size: 1.1rem; }
            .navbar-brand i { font-size: 1.2rem; }
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #e63946;
            --primary-dark: #c1121f;
            --primary-light: #ff6b6b;
            --secondary: #1d3557;
            --secondary-light: #2b4d7a;
            --accent: #f4a261;
            --accent-light: #f9c784;
            --dark: #0d1b2a;
            --dark-soft: #1b2d44;
            --bg-body: #f8f9fa;
            --bg-card: #ffffff;
            --bg-dark-section: #0d1b2a;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-light: #f0f0f0;
            --text-muted: #8a8aaa;
            --border-color: #e2e8f0;
            --border-light: rgba(255, 255, 255, 0.12);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.10);
            --shadow-lg: 0 16px 56px rgba(0, 0, 0, 0.14);
            --shadow-glow: 0 0 30px rgba(230, 57, 70, 0.25);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --header-height: 76px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            scroll-padding-top: var(--header-height);
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }

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

        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

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

        /* ===== Header & Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(13, 27, 42, 0.92);
            backdrop-filter: blur(18px) saturate(1.4);
            border-bottom: 1px solid rgba(255, 255, 255, 0.07);
            height: var(--header-height);
            transition: var(--transition);
        }

        .site-header .navbar {
            padding: 0;
            height: var(--header-height);
        }

        .site-header .navbar-brand {
            font-size: 1.5rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.02em;
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 0;
        }

        .site-header .navbar-brand i {
            color: var(--primary);
            font-size: 1.6rem;
            filter: drop-shadow(0 0 8px rgba(230, 57, 70, 0.5));
        }

        .site-header .navbar-brand:hover {
            color: #fff;
            transform: scale(1.02);
        }

        .site-header .navbar-nav .nav-link {
            color: rgba(255, 255, 255, 0.75);
            font-weight: 500;
            font-size: 0.95rem;
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            position: relative;
        }

        .site-header .navbar-nav .nav-link:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.06);
        }

        .site-header .navbar-nav .nav-link.active {
            color: #fff;
            background: rgba(230, 57, 70, 0.2);
        }

        .site-header .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 4px;
        }

        .navbar-toggler {
            border: 1px solid rgba(255, 255, 255, 0.2);
            padding: 6px 12px;
            color: #fff;
            background: transparent;
            border-radius: var(--radius-sm);
            font-size: 1.3rem;
        }

        .navbar-toggler:hover {
            background: rgba(255, 255, 255, 0.08);
        }

        .navbar-toggler:focus {
            box-shadow: none;
            outline: 2px solid var(--primary);
        }

        /* ===== Hero / Banner ===== */
        .page-banner {
            padding: 140px 0 80px;
            background: var(--bg-dark-section);
            background-image: linear-gradient(135deg, #0d1b2a 0%, #1b2d44 60%, #0d1b2a 100%);
            position: relative;
            overflow: hidden;
            min-height: 340px;
            display: flex;
            align-items: center;
        }

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

        .page-banner::after {
            content: '';
            position: absolute;
            bottom: -60px;
            right: -60px;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(230, 57, 70, 0.15), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .page-banner .container {
            position: relative;
            z-index: 2;
        }

        .page-banner h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.02em;
            margin-bottom: 16px;
            text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }

        .page-banner .breadcrumb-custom {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.95rem;
            margin-bottom: 12px;
        }

        .page-banner .breadcrumb-custom a {
            color: rgba(255, 255, 255, 0.7);
        }
        .page-banner .breadcrumb-custom a:hover {
            color: #fff;
        }

        .page-banner .banner-desc {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.8);
            max-width: 680px;
            line-height: 1.8;
        }

        .banner-badge {
            display: inline-block;
            background: rgba(230, 57, 70, 0.25);
            color: var(--primary-light);
            padding: 4px 18px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.3px;
            border: 1px solid rgba(230, 57, 70, 0.3);
            margin-bottom: 14px;
            backdrop-filter: blur(4px);
        }

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

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

        .section-header .subtitle {
            display: inline-block;
            background: rgba(230, 57, 70, 0.08);
            color: var(--primary);
            padding: 4px 20px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 12px;
        }

        .section-header h2 {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            margin-bottom: 14px;
        }

        .section-header p {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 620px;
            margin: 0 auto;
        }

        .section-dark {
            background: var(--bg-dark-section);
            color: #fff;
        }

        .section-dark .section-header h2 {
            color: #fff;
        }

        .section-dark .section-header p {
            color: rgba(255, 255, 255, 0.7);
        }

        .section-dark .section-header .subtitle {
            background: rgba(230, 57, 70, 0.2);
            color: var(--accent-light);
        }

        /* ===== Cards ===== */
        .card-guide {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
            height: 100%;
            box-shadow: var(--shadow-sm);
        }

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

        .card-guide .card-img-top {
            height: 200px;
            object-fit: cover;
            border-radius: 0;
        }

        .card-guide .card-body {
            padding: 24px 22px 28px;
        }

        .card-guide .card-tag {
            display: inline-block;
            background: rgba(230, 57, 70, 0.08);
            color: var(--primary);
            padding: 2px 14px;
            border-radius: 50px;
            font-size: 0.78rem;
            font-weight: 600;
            margin-bottom: 10px;
        }

        .card-guide .card-title {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-primary);
        }

        .card-guide .card-text {
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
            margin-bottom: 16px;
        }

        .card-guide .card-footer-link {
            color: var(--primary);
            font-weight: 600;
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .card-guide .card-footer-link i {
            transition: var(--transition);
        }

        .card-guide .card-footer-link:hover i {
            transform: translateX(4px);
        }

        /* ===== Step Flow ===== */
        .step-flow {
            display: flex;
            flex-wrap: wrap;
            gap: 30px;
            justify-content: center;
            counter-reset: step;
        }

        .step-item {
            flex: 1 1 180px;
            max-width: 220px;
            text-align: center;
            position: relative;
            counter-increment: step;
        }

        .step-item::before {
            content: counter(step);
            display: block;
            width: 52px;
            height: 52px;
            line-height: 52px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 1.4rem;
            font-weight: 800;
            margin: 0 auto 16px;
            box-shadow: 0 4px 16px rgba(230, 57, 70, 0.3);
        }

        .step-item .step-title {
            font-weight: 700;
            font-size: 1.05rem;
            margin-bottom: 6px;
            color: var(--text-primary);
        }

        .step-item .step-desc {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        .section-dark .step-item .step-title {
            color: #fff;
        }
        .section-dark .step-item .step-desc {
            color: rgba(255, 255, 255, 0.7);
        }
        .section-dark .step-item::before {
            background: var(--accent);
            color: #1a1a2e;
            box-shadow: 0 4px 20px rgba(244, 162, 97, 0.3);
        }

        /* ===== FAQ ===== */
        .faq-accordion .accordion-item {
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm) !important;
            margin-bottom: 12px;
            overflow: hidden;
            background: var(--bg-card);
        }

        .faq-accordion .accordion-button {
            font-weight: 600;
            font-size: 1.05rem;
            color: var(--text-primary);
            background: var(--bg-card);
            padding: 18px 24px;
            box-shadow: none;
        }

        .faq-accordion .accordion-button:not(.collapsed) {
            color: var(--primary);
            background: rgba(230, 57, 70, 0.03);
        }

        .faq-accordion .accordion-button:focus {
            box-shadow: none;
            outline: 2px solid var(--primary);
            outline-offset: -2px;
        }

        .faq-accordion .accordion-button::after {
            background-size: 16px;
        }

        .faq-accordion .accordion-body {
            padding: 8px 24px 20px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.8;
        }

        .section-dark .faq-accordion .accordion-item {
            background: rgba(255, 255, 255, 0.05);
            border-color: rgba(255, 255, 255, 0.1);
        }

        .section-dark .faq-accordion .accordion-button {
            background: transparent;
            color: #fff;
        }

        .section-dark .faq-accordion .accordion-button:not(.collapsed) {
            background: rgba(230, 57, 70, 0.12);
            color: var(--accent-light);
        }

        .section-dark .faq-accordion .accordion-body {
            color: rgba(255, 255, 255, 0.75);
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.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: #fff;
            margin-bottom: 14px;
        }

        .cta-section p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 600px;
            margin: 0 auto 28px;
        }

        .btn-cta {
            display: inline-block;
            padding: 14px 44px;
            background: #fff;
            color: var(--primary-dark);
            font-weight: 700;
            font-size: 1.05rem;
            border-radius: 50px;
            border: none;
            transition: var(--transition);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
        }

        .btn-cta:hover {
            transform: translateY(-3px) scale(1.02);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
            color: var(--primary-dark);
            background: #fff;
        }

        .btn-cta-outline {
            display: inline-block;
            padding: 12px 36px;
            background: transparent;
            color: #fff;
            font-weight: 600;
            font-size: 1rem;
            border-radius: 50px;
            border: 2px solid rgba(255, 255, 255, 0.4);
            transition: var(--transition);
        }

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

        /* ===== Stats / Numbers ===== */
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .stat-item {
            text-align: center;
            padding: 28px 16px;
            background: rgba(255, 255, 255, 0.04);
            border-radius: var(--radius-md);
            border: 1px solid rgba(255, 255, 255, 0.06);
            transition: var(--transition);
        }

        .stat-item:hover {
            background: rgba(255, 255, 255, 0.08);
            transform: translateY(-4px);
        }

        .stat-item .stat-number {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
            margin-bottom: 4px;
        }

        .stat-item .stat-label {
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.7);
            font-weight: 500;
        }

        /* ===== Tag List ===== */
        .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .tag-item {
            display: inline-block;
            padding: 6px 18px;
            background: rgba(230, 57, 70, 0.06);
            color: var(--primary);
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 500;
            border: 1px solid rgba(230, 57, 70, 0.12);
            transition: var(--transition);
        }

        .tag-item:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            transform: translateY(-2px);
        }

        .section-dark .tag-item {
            background: rgba(255, 255, 255, 0.06);
            color: rgba(255, 255, 255, 0.8);
            border-color: rgba(255, 255, 255, 0.12);
        }

        .section-dark .tag-item:hover {
            background: var(--accent);
            color: #1a1a2e;
            border-color: var(--accent);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0a1524;
            color: rgba(255, 255, 255, 0.75);
            padding: 56px 0 0;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }

        .site-footer .footer-brand {
            font-size: 1.6rem;
            font-weight: 800;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 14px;
        }

        .site-footer .footer-brand i {
            color: var(--primary);
            font-size: 1.5rem;
        }

        .site-footer .footer-desc {
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.8;
            max-width: 340px;
        }

        .site-footer .footer-heading {
            font-size: 1.05rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }

        .site-footer .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .site-footer .footer-links a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.92rem;
            transition: var(--transition);
        }

        .site-footer .footer-links a:hover {
            color: var(--primary-light);
            padding-left: 4px;
        }

        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 20px 0;
            margin-top: 40px;
            text-align: center;
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.45);
        }

        .site-footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }
        .site-footer .footer-bottom a:hover {
            color: var(--primary-light);
        }

        /* ===== Responsive ===== */
        @media (max-width: 991.98px) {
            .site-header .navbar-collapse {
                background: rgba(13, 27, 42, 0.98);
                backdrop-filter: blur(20px);
                border-radius: var(--radius-md);
                padding: 16px;
                margin-top: 8px;
                border: 1px solid rgba(255, 255, 255, 0.06);
            }

            .site-header .navbar-nav .nav-link {
                padding: 10px 16px;
                font-size: 1rem;
            }

            .site-header .navbar-nav .nav-link.active::after {
                display: none;
            }

            .page-banner h1 {
                font-size: 2rem;
            }

            .page-banner .banner-desc {
                font-size: 1rem;
            }

            .section-header h2 {
                font-size: 1.7rem;
            }

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

            .step-item {
                flex: 1 1 140px;
                max-width: 160px;
            }
        }

        @media (max-width: 767.98px) {
            :root {
                --header-height: 64px;
            }

            .page-banner {
                padding: 100px 0 56px;
                min-height: 260px;
            }

            .page-banner h1 {
                font-size: 1.6rem;
            }

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

            .section {
                padding: 48px 0;
            }

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

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

            .card-guide .card-img-top {
                height: 160px;
            }

            .step-flow {
                gap: 20px;
            }

            .step-item {
                flex: 1 1 120px;
                max-width: 140px;
            }

            .step-item::before {
                width: 42px;
                height: 42px;
                line-height: 42px;
                font-size: 1.1rem;
            }

            .stat-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }

            .stat-item .stat-number {
                font-size: 1.8rem;
            }

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

            .btn-cta {
                padding: 12px 32px;
                font-size: 0.95rem;
            }

            .site-footer {
                padding: 40px 0 0;
            }

            .site-footer .footer-bottom {
                margin-top: 24px;
                font-size: 0.82rem;
            }
        }

        @media (max-width: 520px) {
            .page-banner h1 {
                font-size: 1.3rem;
            }

            .page-banner .banner-desc {
                font-size: 0.88rem;
            }

            .section-header h2 {
                font-size: 1.2rem;
            }

            .card-guide .card-body {
                padding: 18px 16px 22px;
            }

            .step-item {
                flex: 1 1 100%;
                max-width: 100%;
                display: flex;
                align-items: center;
                gap: 16px;
                text-align: left;
            }

            .step-item::before {
                margin: 0 0 0 0;
                flex-shrink: 0;
            }

            .stat-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 8px;
            }

            .stat-item {
                padding: 18px 12px;
            }

            .stat-item .stat-number {
                font-size: 1.5rem;
            }

            .faq-accordion .accordion-button {
                font-size: 0.95rem;
                padding: 14px 16px;
            }

            .faq-accordion .accordion-body {
                padding: 6px 16px 16px;
                font-size: 0.88rem;
            }
        }