/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0B0E1A;
            --primary-light: #1A1F3D;
            --secondary: #2D3561;
            --accent: #F0A500;
            --accent-hover: #D49100;
            --accent-light: rgba(240, 165, 0, 0.12);
            --bg: #FFFFFF;
            --bg-alt: #F5F6FA;
            --bg-dark: #0B0E1A;
            --text: #1A1F3D;
            --text-light: #6B7280;
            --text-white: #FFFFFF;
            --text-muted: #9CA3AF;
            --border: #E8EAF0;
            --border-light: #F0F1F5;
            --radius: 14px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 8px 30px rgba(11, 14, 26, 0.08);
            --shadow-hover: 0 16px 48px rgba(11, 14, 26, 0.14);
            --shadow-nav: 0 2px 20px rgba(11, 14, 26, 0.06);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --container: 1200px;
            --header-h: 76px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            overflow-x: hidden;
        }
        a {
            color: var(--accent);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent-hover);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }
        button {
            cursor: pointer;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text);
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }
        .container-sm {
            max-width: 880px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Section Spacing ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-alt);
        }
        .section-dark {
            background: var(--bg-dark);
            color: var(--text-white);
        }
        .section-title {
            font-size: 2.2rem;
            font-weight: 800;
            text-align: center;
            margin-bottom: 12px;
            letter-spacing: -0.02em;
        }
        .section-sub {
            font-size: 1.1rem;
            color: var(--text-light);
            text-align: center;
            max-width: 640px;
            margin: 0 auto 48px auto;
            line-height: 1.6;
        }
        .section-dark .section-title {
            color: var(--text-white);
        }
        .section-dark .section-sub {
            color: rgba(255, 255, 255, 0.7);
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
            border: 2px solid transparent;
            line-height: 1.2;
        }
        .btn-primary {
            background: var(--accent);
            color: var(--primary);
            border-color: var(--accent);
        }
        .btn-primary:hover {
            background: var(--accent-hover);
            border-color: var(--accent-hover);
            color: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(240, 165, 0, 0.35);
        }
        .btn-outline {
            background: transparent;
            color: var(--text-white);
            border-color: rgba(255, 255, 255, 0.4);
        }
        .btn-outline:hover {
            background: var(--text-white);
            color: var(--primary);
            border-color: var(--text-white);
            transform: translateY(-2px);
        }
        .btn-lg {
            padding: 18px 40px;
            font-size: 1.1rem;
            border-radius: var(--radius);
        }
        .btn-sm {
            padding: 8px 18px;
            font-size: 0.875rem;
            border-radius: var(--radius-sm);
        }
        .btn:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
        }

        /* ===== Badge / Tag ===== */
        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            background: var(--accent-light);
            color: var(--accent);
            letter-spacing: 0.3px;
        }
        .badge-sm {
            padding: 2px 10px;
            font-size: 0.7rem;
        }
        .badge-white {
            background: rgba(255, 255, 255, 0.15);
            color: var(--text-white);
        }

        /* ===== Card ===== */
        .card {
            background: var(--bg);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            overflow: hidden;
        }
        .card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .card-img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            display: block;
        }
        .card-body {
            padding: 24px;
        }
        .card-title {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text);
        }
        .card-text {
            font-size: 0.95rem;
            color: var(--text-light);
            line-height: 1.6;
        }
        .card-meta {
            font-size: 0.85rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: 12px;
        }

        /* ===== Grid ===== */
        .grid-2 {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
        }
        .grid-3 {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 28px;
        }
        .grid-4 {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr 1fr;
            gap: 24px;
        }

        /* ===== Header / Nav ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-h);
            background: rgba(11, 14, 26, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: var(--transition);
        }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: center;
            height: 100%;
            position: relative;
        }
        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 8px;
            flex: 1;
        }
        .nav-left {
            justify-content: flex-end;
        }
        .nav-right {
            justify-content: flex-start;
        }
        .nav-link {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.75);
            transition: var(--transition);
            position: relative;
            white-space: nowrap;
        }
        .nav-link:hover {
            color: var(--text-white);
            background: rgba(255, 255, 255, 0.06);
        }
        .nav-link.active {
            color: var(--accent);
            background: rgba(240, 165, 0, 0.1);
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 2px;
            background: var(--accent);
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: -0.03em;
            padding: 0 20px;
            flex-shrink: 0;
            transition: var(--transition);
        }
        .logo:hover {
            color: var(--accent);
        }
        .logo i {
            color: var(--accent);
            font-size: 1.4rem;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-white);
            font-size: 1.5rem;
            padding: 8px;
            cursor: pointer;
            position: absolute;
            right: 16px;
            top: 50%;
            transform: translateY(-50%);
            z-index: 1001;
        }
        .nav-toggle:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-radius: 4px;
        }

        /* ===== Mobile Nav ===== */
        .mobile-nav {
            display: none;
            position: fixed;
            top: var(--header-h);
            left: 0;
            right: 0;
            background: rgba(11, 14, 26, 0.98);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            padding: 20px 24px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            z-index: 999;
            transform: translateY(-120%);
            transition: var(--transition);
        }
        .mobile-nav.open {
            transform: translateY(0);
        }
        .mobile-nav .nav-link {
            display: block;
            padding: 14px 16px;
            font-size: 1.05rem;
            border-radius: var(--radius-sm);
        }
        .mobile-nav .nav-link.active {
            background: rgba(240, 165, 0, 0.12);
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 120px 24px 80px;
            background: var(--bg-dark);
            overflow: hidden;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.35;
            z-index: 0;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11, 14, 26, 0.70) 0%, rgba(11, 14, 26, 0.85) 100%);
            z-index: 1;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 820px;
        }
        .hero-badge {
            display: inline-block;
            padding: 6px 20px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            background: rgba(240, 165, 0, 0.18);
            color: var(--accent);
            border: 1px solid rgba(240, 165, 0, 0.25);
            margin-bottom: 24px;
            letter-spacing: 0.5px;
        }
        .hero-title {
            font-size: 3.6rem;
            font-weight: 900;
            color: var(--text-white);
            letter-spacing: -0.03em;
            line-height: 1.15;
            margin-bottom: 20px;
        }
        .hero-title span {
            color: var(--accent);
        }
        .hero-sub {
            font-size: 1.2rem;
            color: rgba(255, 255, 255, 0.75);
            max-width: 600px;
            margin: 0 auto 36px auto;
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
        }
        .hero-stats {
            display: flex;
            justify-content: center;
            gap: 48px;
            margin-top: 56px;
            flex-wrap: wrap;
        }
        .hero-stat {
            text-align: center;
        }
        .hero-stat-num {
            font-size: 2.4rem;
            font-weight: 900;
            color: var(--text-white);
            letter-spacing: -0.02em;
        }
        .hero-stat-label {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
            margin-top: 4px;
        }
        .hero-stat-num .accent {
            color: var(--accent);
        }

        /* ===== Intro Section ===== */
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .intro-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .intro-image img {
            width: 100%;
            aspect-ratio: 4 / 3;
            object-fit: cover;
        }
        .intro-text h2 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: -0.02em;
        }
        .intro-text p {
            color: var(--text-light);
            font-size: 1.05rem;
            line-height: 1.8;
            margin-bottom: 16px;
        }
        .intro-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
            margin-top: 24px;
        }
        .intro-feature {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.95rem;
            color: var(--text);
            font-weight: 500;
        }
        .intro-feature i {
            color: var(--accent);
            font-size: 1.1rem;
            width: 24px;
            text-align: center;
        }

        /* ===== Category Cards ===== */
        .cat-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .cat-card {
            background: var(--bg);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            padding: 28px 24px;
            text-align: center;
            transition: var(--transition);
            cursor: pointer;
        }
        .cat-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-6px);
        }
        .cat-card-icon {
            width: 64px;
            height: 64px;
            border-radius: 16px;
            background: var(--accent-light);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px auto;
            font-size: 1.6rem;
            color: var(--accent);
            transition: var(--transition);
        }
        .cat-card:hover .cat-card-icon {
            background: var(--accent);
            color: var(--primary);
        }
        .cat-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .cat-card p {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.5;
        }
        .cat-card .badge {
            margin-top: 12px;
        }

        /* ===== CMS Posts List ===== */
        .posts-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        .post-card {
            display: flex;
            gap: 20px;
            background: var(--bg);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            padding: 20px;
            transition: var(--transition);
        }
        .post-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }
        .post-card-img {
            width: 140px;
            min-height: 100px;
            border-radius: var(--radius-sm);
            object-fit: cover;
            flex-shrink: 0;
            background: var(--bg-alt);
        }
        .post-card-body {
            flex: 1;
            min-width: 0;
        }
        .post-card-body h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 6px;
            line-height: 1.4;
        }
        .post-card-body h3 a {
            color: var(--text);
        }
        .post-card-body h3 a:hover {
            color: var(--accent);
        }
        .post-card-body p {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .post-card-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            margin-top: 10px;
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        .post-card-meta .badge {
            font-size: 0.7rem;
            padding: 2px 10px;
        }
        .empty-posts {
            grid-column: 1 / -1;
            text-align: center;
            padding: 48px 24px;
            color: var(--text-light);
            font-size: 1.05rem;
            background: var(--bg);
            border-radius: var(--radius);
            border: 1px dashed var(--border);
        }
        .empty-posts i {
            font-size: 2.4rem;
            color: var(--border);
            margin-bottom: 12px;
            display: block;
        }

        /* ===== Stats / Data ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }
        .stat-item {
            padding: 32px 16px;
            background: rgba(255, 255, 255, 0.04);
            border-radius: var(--radius);
            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 .num {
            font-size: 2.8rem;
            font-weight: 900;
            color: var(--accent);
            letter-spacing: -0.02em;
        }
        .stat-item .label {
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 6px;
        }
        .stat-item .desc {
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.4);
            margin-top: 4px;
        }

        /* ===== Steps / Flow ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
            counter-reset: step;
        }
        .step-card {
            background: var(--bg);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            padding: 32px 24px;
            text-align: center;
            position: relative;
            transition: var(--transition);
        }
        .step-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .step-card::before {
            counter-increment: step;
            content: counter(step);
            position: absolute;
            top: -14px;
            left: 50%;
            transform: translateX(-50%);
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--accent);
            color: var(--primary);
            font-weight: 800;
            font-size: 1rem;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 12px rgba(240, 165, 0, 0.3);
        }
        .step-card-icon {
            font-size: 2.2rem;
            color: var(--accent);
            margin-bottom: 16px;
            margin-top: 8px;
        }
        .step-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .step-card p {
            font-size: 0.95rem;
            color: var(--text-light);
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--accent);
        }
        .faq-question {
            width: 100%;
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text);
            background: none;
            text-align: left;
            cursor: pointer;
            transition: var(--transition);
            gap: 16px;
        }
        .faq-question:hover {
            color: var(--accent);
        }
        .faq-question i {
            font-size: 1.2rem;
            color: var(--text-muted);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--accent);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: var(--transition);
            padding: 0 24px;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px 24px;
        }
        .faq-answer p {
            font-size: 0.95rem;
            color: var(--text-light);
            line-height: 1.7;
        }

        /* ===== CTA ===== */
        .cta-box {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            border-radius: var(--radius-lg);
            padding: 64px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-box::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.08;
            z-index: 0;
        }
        .cta-box>* {
            position: relative;
            z-index: 1;
        }
        .cta-box h2 {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 12px;
        }
        .cta-box p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.75);
            max-width: 520px;
            margin: 0 auto 28px auto;
        }
        .cta-box .btn {
            font-size: 1.1rem;
            padding: 16px 40px;
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 48px 0 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 32px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer-brand .logo {
            padding: 0;
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.5);
            max-width: 320px;
            line-height: 1.7;
        }
        .footer h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.55);
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--accent);
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 24px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.35);
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.45);
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            border: 1px solid rgba(255, 255, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.5);
            font-size: 1rem;
            transition: var(--transition);
        }
        .footer-social a:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: rgba(240, 165, 0, 0.08);
        }

        /* ===== Divider ===== */
        .divider {
            width: 60px;
            height: 4px;
            border-radius: 2px;
            background: var(--accent);
            margin: 0 auto 24px auto;
        }
        .divider-left {
            margin: 0 0 24px 0;
        }

        /* ===== Scroll Top ===== */
        .scroll-top {
            position: fixed;
            bottom: 32px;
            right: 32px;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--accent);
            color: var(--primary);
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 16px rgba(240, 165, 0, 0.3);
            z-index: 900;
            opacity: 0;
            visibility: hidden;
            transform: translateY(20px);
            transition: var(--transition);
            border: none;
            cursor: pointer;
        }
        .scroll-top.visible {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        .scroll-top:hover {
            background: var(--accent-hover);
            transform: translateY(-4px);
            box-shadow: 0 8px 24px rgba(240, 165, 0, 0.4);
        }
        .scroll-top:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .cat-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: 1fr 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .hero-title {
                font-size: 2.8rem;
            }
        }

        @media (max-width: 768px) {
            .nav-left,
            .nav-right {
                display: none;
            }
            .nav-toggle {
                display: block;
            }
            .mobile-nav {
                display: block;
            }
            .header .container {
                justify-content: space-between;
            }
            .logo {
                font-size: 1.25rem;
                padding: 0;
            }
            .hero-title {
                font-size: 2.2rem;
            }
            .hero-sub {
                font-size: 1rem;
            }
            .hero-stats {
                gap: 24px;
            }
            .hero-stat-num {
                font-size: 1.8rem;
            }
            .section {
                padding: 56px 0;
            }
            .section-title {
                font-size: 1.7rem;
            }
            .section-sub {
                font-size: 1rem;
                margin-bottom: 32px;
            }
            .intro-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .intro-features {
                grid-template-columns: 1fr;
            }
            .grid-2,
            .grid-3,
            .grid-4 {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .posts-grid {
                grid-template-columns: 1fr;
            }
            .post-card {
                flex-direction: column;
            }
            .post-card-img {
                width: 100%;
                height: 160px;
            }
            .cat-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .stat-item {
                padding: 20px 12px;
            }
            .stat-item .num {
                font-size: 2rem;
            }
            .cta-box {
                padding: 40px 24px;
            }
            .cta-box h2 {
                font-size: 1.6rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .scroll-top {
                bottom: 20px;
                right: 20px;
                width: 42px;
                height: 42px;
                font-size: 1rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .hero {
                padding: 100px 16px 60px;
                min-height: 92vh;
            }
            .hero-title {
                font-size: 1.8rem;
            }
            .hero-sub {
                font-size: 0.95rem;
            }
            .hero-actions .btn {
                padding: 12px 24px;
                font-size: 0.95rem;
            }
            .hero-stats {
                gap: 16px;
            }
            .hero-stat-num {
                font-size: 1.5rem;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .cat-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-item .num {
                font-size: 1.6rem;
            }
            .cat-card {
                padding: 20px 16px;
            }
            .step-card {
                padding: 24px 16px;
            }
            .faq-question {
                padding: 16px 16px;
                font-size: 0.95rem;
            }
            .faq-answer {
                padding: 0 16px;
            }
            .faq-item.open .faq-answer {
                padding: 0 16px 16px 16px;
            }
            .cta-box {
                padding: 32px 16px;
            }
            .cta-box h2 {
                font-size: 1.3rem;
            }
            .footer {
                padding: 32px 0 24px;
            }
            .logo {
                font-size: 1.1rem;
            }
            .logo i {
                font-size: 1.1rem;
            }
        }

        /* ===== Accessibility ===== */
        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                transition-duration: 0.01ms !important;
                animation-duration: 0.01ms !important;
            }
        }
        :focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
        }

        /* ===== Selection ===== */
        ::selection {
            background: var(--accent);
            color: var(--primary);
        }

        /* ===== Placeholder ===== */
        ::placeholder {
            color: var(--text-muted);
            opacity: 1;
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a237e;
            --primary-light: #283593;
            --primary-dark: #0d1452;
            --accent: #f9a825;
            --accent-light: #ffd54f;
            --accent-dark: #f57f17;
            --bg: #0a0e27;
            --bg-card: #111638;
            --bg-light: #1a2045;
            --text: #f0f4ff;
            --text-muted: #9aa4d6;
            --text-dark: #e0e4f5;
            --border: #2a3070;
            --radius: 16px;
            --radius-sm: 10px;
            --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
            --shadow-hover: 0 16px 48px rgba(0, 0, 0, 0.6);
            --transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --container: 1200px;
            --gap: 24px;
            --header-h: 72px;
        }

        /* ===== 基础重置 ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

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

        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            min-height: 100vh;
            padding-top: var(--header-h);
        }

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

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

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

        a:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 4px;
            border-radius: 4px;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            transition: var(--transition);
        }

        button {
            cursor: pointer;
            background: none;
        }

        button:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 4px;
        }

        ul,
        ol {
            list-style: none;
        }

        /* ===== 容器 ===== */
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 var(--gap);
        }

        /* ===== 导航 ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(10, 14, 39, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(42, 48, 112, 0.5);
            height: var(--header-h);
        }

        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 24px;
            font-weight: 700;
            color: var(--text) !important;
            letter-spacing: 1px;
            flex-shrink: 0;
        }

        .logo i {
            color: var(--accent);
            font-size: 28px;
        }

        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .nav-link {
            padding: 8px 18px;
            border-radius: 8px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-muted) !important;
            transition: var(--transition);
            white-space: nowrap;
        }

        .nav-link:hover {
            color: var(--text) !important;
            background: rgba(249, 168, 37, 0.1);
        }

        .nav-link.active {
            color: var(--accent) !important;
            background: rgba(249, 168, 37, 0.15);
        }

        .nav-toggle {
            display: none;
            font-size: 24px;
            color: var(--text);
            padding: 8px 12px;
            border-radius: 8px;
            background: rgba(255, 255, 255, 0.05);
        }

        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }

        /* ===== Banner / Hero 内页 ===== */
        .page-banner {
            position: relative;
            padding: 80px 0 64px;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--bg) 60%);
            text-align: center;
            overflow: hidden;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.2;
            pointer-events: none;
        }

        .page-banner .container {
            position: relative;
            z-index: 1;
        }

        .page-banner h1 {
            font-size: 42px;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 16px;
            letter-spacing: 2px;
        }

        .page-banner h1 i {
            color: var(--accent);
            margin-right: 12px;
        }

        .page-banner p {
            font-size: 18px;
            color: var(--text-muted);
            max-width: 700px;
            margin: 0 auto;
            line-height: 1.8;
        }

        .breadcrumb {
            display: flex;
            justify-content: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }

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

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

        .breadcrumb .sep {
            color: var(--border);
        }

        /* ===== 分类标签导航 ===== */
        .tag-nav {
            background: var(--bg-card);
            border-bottom: 1px solid var(--border);
            padding: 16px 0;
            position: sticky;
            top: var(--header-h);
            z-index: 100;
            backdrop-filter: blur(12px);
        }

        .tag-nav .container {
            display: flex;
            justify-content: center;
            gap: 10px;
            flex-wrap: wrap;
        }

        .tag-btn {
            padding: 8px 24px;
            border-radius: 100px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-muted);
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid transparent;
            transition: var(--transition);
        }

        .tag-btn:hover {
            color: var(--text);
            background: rgba(249, 168, 37, 0.1);
            border-color: var(--accent);
        }

        .tag-btn.active {
            color: var(--accent);
            background: rgba(249, 168, 37, 0.15);
            border-color: var(--accent);
        }

        /* ===== 筛选与搜索 ===== */
        .filter-bar {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
            margin-bottom: 32px;
            padding: 16px 20px;
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border);
        }

        .filter-bar .info {
            font-size: 15px;
            color: var(--text-muted);
        }

        .filter-bar .info strong {
            color: var(--accent);
        }

        .search-box {
            display: flex;
            align-items: center;
            gap: 0;
            background: var(--bg-light);
            border-radius: 100px;
            border: 1px solid var(--border);
            overflow: hidden;
        }

        .search-box input {
            padding: 10px 18px;
            background: transparent;
            color: var(--text);
            min-width: 200px;
            border: none;
        }

        .search-box input::placeholder {
            color: var(--text-muted);
        }

        .search-box button {
            padding: 10px 20px;
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 600;
            border: none;
        }

        .search-box button:hover {
            background: var(--accent-light);
        }

        /* ===== 资源卡片网格 ===== */
        .resource-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: var(--gap);
            margin-bottom: 48px;
        }

        .resource-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }

        .resource-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: var(--accent);
        }

        .resource-card .card-img {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--bg-light);
        }

        .resource-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }

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

        .resource-card .card-img .badge {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--accent);
            color: var(--primary-dark);
            padding: 4px 14px;
            border-radius: 100px;
            font-size: 12px;
            font-weight: 700;
            letter-spacing: 0.5px;
        }

        .resource-card .card-body {
            padding: 20px 22px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .resource-card .card-body h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .resource-card .card-body h3 a {
            color: var(--text) !important;
        }

        .resource-card .card-body h3 a:hover {
            color: var(--accent) !important;
        }

        .resource-card .card-body p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 16px;
            flex: 1;
        }

        .resource-card .card-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 13px;
            color: var(--text-muted);
            border-top: 1px solid var(--border);
            padding-top: 14px;
            margin-top: auto;
        }

        .resource-card .card-meta .tag {
            display: inline-block;
            padding: 2px 12px;
            border-radius: 100px;
            background: rgba(249, 168, 37, 0.1);
            color: var(--accent);
            font-size: 12px;
        }

        .resource-card .card-meta .action a {
            color: var(--text-muted);
            font-size: 13px;
        }

        .resource-card .card-meta .action a:hover {
            color: var(--accent);
        }

        /* ===== 精选推荐 ===== */
        .featured-section {
            padding: 64px 0;
            background: var(--bg-card);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .featured-section .section-title {
            text-align: center;
            margin-bottom: 40px;
        }

        .featured-section .section-title h2 {
            font-size: 32px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 10px;
        }

        .featured-section .section-title p {
            color: var(--text-muted);
            font-size: 16px;
        }

        .featured-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
            gap: var(--gap);
        }

        .featured-card {
            display: flex;
            gap: 20px;
            background: var(--bg);
            border-radius: var(--radius);
            padding: 20px 24px;
            border: 1px solid var(--border);
            transition: var(--transition);
            align-items: flex-start;
        }

        .featured-card:hover {
            border-color: var(--accent);
            box-shadow: var(--shadow);
        }

        .featured-card .icon {
            flex-shrink: 0;
            width: 52px;
            height: 52px;
            border-radius: 12px;
            background: rgba(249, 168, 37, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: var(--accent);
        }

        .featured-card .info {
            flex: 1;
        }

        .featured-card .info h4 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 4px;
        }

        .featured-card .info p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 8px;
        }

        .featured-card .info .link {
            font-size: 13px;
            color: var(--accent);
            font-weight: 500;
        }

        .featured-card .info .link i {
            font-size: 12px;
            margin-left: 4px;
        }

        /* ===== 使用指南 ===== */
        .guide-section {
            padding: 64px 0;
        }

        .guide-section .section-title {
            text-align: center;
            margin-bottom: 40px;
        }

        .guide-section .section-title h2 {
            font-size: 32px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 10px;
        }

        .guide-section .section-title p {
            color: var(--text-muted);
            font-size: 16px;
        }

        .guide-steps {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
            gap: var(--gap);
            counter-reset: step;
        }

        .guide-step {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 24px 28px;
            border: 1px solid var(--border);
            text-align: center;
            transition: var(--transition);
            position: relative;
        }

        .guide-step:hover {
            border-color: var(--accent);
            transform: translateY(-4px);
            box-shadow: var(--shadow);
        }

        .guide-step .step-num {
            font-size: 48px;
            font-weight: 800;
            color: var(--accent);
            opacity: 0.3;
            line-height: 1;
            margin-bottom: 12px;
        }

        .guide-step h4 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 8px;
        }

        .guide-step p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 64px 0;
            background: var(--bg-card);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .faq-section .section-title {
            text-align: center;
            margin-bottom: 40px;
        }

        .faq-section .section-title h2 {
            font-size: 32px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 10px;
        }

        .faq-section .section-title p {
            color: var(--text-muted);
            font-size: 16px;
        }

        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

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

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

        .faq-item summary {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 16px;
            color: var(--text);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            list-style: none;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary .icon {
            font-size: 18px;
            color: var(--accent);
            transition: var(--transition);
        }

        .faq-item[open] summary .icon {
            transform: rotate(45deg);
        }

        .faq-item .answer {
            padding: 0 24px 20px;
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.8;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 72px 0;
            text-align: center;
            background: linear-gradient(135deg, var(--primary-dark), var(--bg));
            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: 0.1;
            pointer-events: none;
        }

        .cta-section .container {
            position: relative;
            z-index: 1;
        }

        .cta-section h2 {
            font-size: 34px;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 14px;
        }

        .cta-section p {
            font-size: 17px;
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto 28px;
        }

        .cta-buttons {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            border-radius: 100px;
            font-weight: 600;
            font-size: 16px;
            transition: var(--transition);
            border: 2px solid transparent;
        }

        .btn-primary {
            background: var(--accent);
            color: var(--primary-dark) !important;
        }

        .btn-primary:hover {
            background: var(--accent-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(249, 168, 37, 0.3);
        }

        .btn-outline {
            background: transparent;
            color: var(--text) !important;
            border-color: var(--border);
        }

        .btn-outline:hover {
            border-color: var(--accent);
            color: var(--accent) !important;
            background: rgba(249, 168, 37, 0.05);
        }

        /* ===== 页脚 (共享) ===== */
        .footer {
            background: var(--primary-dark);
            border-top: 1px solid var(--border);
            padding: 56px 0 24px;
            color: var(--text-muted);
        }

        .footer .logo {
            color: var(--text) !important;
            margin-bottom: 12px;
        }

        .footer p {
            font-size: 14px;
            line-height: 1.8;
            max-width: 320px;
        }

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

        .footer-grid h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }

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

        .footer-links a {
            color: var(--text-muted) !important;
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .footer-links a:hover {
            color: var(--accent) !important;
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 24px;
            border-top: 1px solid var(--border);
            font-size: 13px;
            flex-wrap: wrap;
            gap: 12px;
        }

        .footer-social {
            display: flex;
            gap: 12px;
        }

        .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.05);
            color: var(--text-muted) !important;
            font-size: 18px;
            transition: var(--transition);
        }

        .footer-social a:hover {
            background: var(--accent);
            color: var(--primary-dark) !important;
        }

        /* ===== 分页 ===== */
        .pagination {
            display: flex;
            justify-content: center;
            gap: 8px;
            margin: 40px 0 16px;
            flex-wrap: wrap;
        }

        .pagination a,
        .pagination span {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 44px;
            height: 44px;
            padding: 0 14px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-muted);
            background: var(--bg-card);
            border: 1px solid var(--border);
            transition: var(--transition);
        }

        .pagination a:hover {
            border-color: var(--accent);
            color: var(--accent);
        }

        .pagination .current {
            background: var(--accent);
            color: var(--primary-dark);
            border-color: var(--accent);
            font-weight: 700;
        }

        .pagination .disabled {
            opacity: 0.4;
            pointer-events: none;
        }

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

            .page-banner h1 {
                font-size: 34px;
            }

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

        @media (max-width: 768px) {
            :root {
                --header-h: 64px;
                --gap: 16px;
            }

            .nav-left,
            .nav-right {
                display: none;
                flex-direction: column;
                width: 100%;
                background: var(--bg);
                padding: 16px;
                gap: 4px;
                border-top: 1px solid var(--border);
            }

            .nav-left.open,
            .nav-right.open {
                display: flex;
            }

            .header .container {
                flex-wrap: wrap;
                position: relative;
            }

            .nav-toggle {
                display: block;
            }

            .nav-left {
                order: 3;
                margin-top: 8px;
            }

            .nav-right {
                order: 4;
            }

            .page-banner {
                padding: 48px 0 40px;
            }

            .page-banner h1 {
                font-size: 26px;
            }

            .page-banner p {
                font-size: 15px;
            }

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

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

            .guide-steps {
                grid-template-columns: 1fr 1fr;
            }

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

            .search-box input {
                min-width: 0;
                flex: 1;
            }

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

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

            .cta-section h2 {
                font-size: 26px;
            }

            .btn {
                padding: 12px 28px;
                font-size: 15px;
            }

            .tag-nav .container {
                gap: 6px;
            }

            .tag-btn {
                padding: 6px 16px;
                font-size: 13px;
            }
        }

        @media (max-width: 520px) {
            .resource-grid {
                grid-template-columns: 1fr;
            }

            .guide-steps {
                grid-template-columns: 1fr;
            }

            .page-banner h1 {
                font-size: 22px;
            }

            .featured-card {
                flex-direction: column;
                align-items: center;
                text-align: center;
            }

            .featured-card .icon {
                width: 44px;
                height: 44px;
                font-size: 20px;
            }

            .search-box {
                flex-direction: column;
                border-radius: var(--radius-sm);
            }

            .search-box input {
                width: 100%;
                border-bottom: 1px solid var(--border);
            }

            .search-box button {
                width: 100%;
                border-radius: 0;
            }
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0a1628;
            --primary-light: #132240;
            --primary-dark: #050d18;
            --accent: #f0b429;
            --accent-light: #f7d06a;
            --accent-dark: #d49a1a;
            --secondary: #4a9eff;
            --secondary-light: #7ab8ff;
            --bg-body: #f4f6fa;
            --bg-card: #ffffff;
            --bg-dark: #0a1628;
            --bg-section-alt: #eef2f7;
            --text-primary: #1a2332;
            --text-secondary: #4a5568;
            --text-light: #8896a8;
            --text-white: #ffffff;
            --text-accent: #f0b429;
            --border: #e2e8f0;
            --border-light: #f0f2f5;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-xs: 6px;
            --shadow: 0 4px 24px rgba(10, 22, 40, 0.08);
            --shadow-lg: 0 12px 48px rgba(10, 22, 40, 0.12);
            --shadow-hover: 0 16px 48px rgba(10, 22, 40, 0.16);
            --transition: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
            --spacing-section: 5rem;
        }

        /* ===== 基础重置 ===== */
        *,
        *::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: 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(--secondary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
        }
        button {
            cursor: pointer;
            background: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-primary);
        }
        h1 {
            font-size: 2.4rem;
        }
        h2 {
            font-size: 1.8rem;
        }
        h3 {
            font-size: 1.35rem;
        }
        h4 {
            font-size: 1.1rem;
        }
        p {
            margin-bottom: 1rem;
            color: var(--text-secondary);
        }
        p:last-child {
            margin-bottom: 0;
        }

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

        /* ===== Header / 导航 ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background: rgba(10, 22, 40, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: background var(--transition), box-shadow var(--transition);
        }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-link {
            padding: 8px 18px;
            font-size: 0.95rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.78);
            border-radius: var(--radius-xs);
            transition: color var(--transition), background var(--transition);
            letter-spacing: 0.3px;
        }
        .nav-link:hover {
            color: var(--text-white);
            background: rgba(255, 255, 255, 0.08);
        }
        .nav-link.active {
            color: var(--accent);
            background: rgba(240, 180, 41, 0.12);
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: 0.5px;
            transition: opacity var(--transition);
            flex-shrink: 0;
            padding: 0 12px;
        }
        .logo i {
            color: var(--accent);
            font-size: 1.3rem;
        }
        .logo:hover {
            opacity: 0.88;
            color: var(--text-white);
        }
        .nav-toggle {
            display: none;
            font-size: 1.4rem;
            color: var(--text-white);
            padding: 8px 12px;
            border-radius: var(--radius-xs);
            transition: background var(--transition);
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.08);
        }

        /* ===== 移动端导航菜单 ===== */
        .mobile-menu {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            background: rgba(10, 22, 40, 0.98);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            padding: 24px 28px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            z-index: 999;
            transform: translateY(-12px);
            opacity: 0;
            transition: transform 0.35s ease, opacity 0.35s ease;
            pointer-events: none;
        }
        .mobile-menu.open {
            transform: translateY(0);
            opacity: 1;
            pointer-events: auto;
        }
        .mobile-menu .nav-link {
            display: block;
            padding: 14px 18px;
            font-size: 1.05rem;
            border-radius: var(--radius-sm);
            color: rgba(255, 255, 255, 0.8);
        }
        .mobile-menu .nav-link:hover {
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-white);
        }
        .mobile-menu .nav-link.active {
            color: var(--accent);
            background: rgba(240, 180, 41, 0.1);
        }

        /* ===== Hero 文章头图 ===== */
        .article-hero {
            position: relative;
            padding: calc(var(--header-height) + 2rem) 0 3rem;
            background: var(--primary-dark);
            overflow: hidden;
            min-height: 320px;
            display: flex;
            align-items: flex-end;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.25;
            z-index: 0;
        }
        .article-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(10, 22, 40, 0.30) 0%, rgba(10, 22, 40, 0.85) 100%);
            z-index: 1;
        }
        .article-hero .container {
            position: relative;
            z-index: 2;
            width: 100%;
        }
        .article-hero .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 1.2rem;
            flex-wrap: wrap;
        }
        .article-hero .breadcrumb a {
            color: rgba(255, 255, 255, 0.7);
            transition: color var(--transition);
        }
        .article-hero .breadcrumb a:hover {
            color: var(--accent);
        }
        .article-hero .breadcrumb span {
            color: rgba(255, 255, 255, 0.4);
        }
        .article-hero .post-category {
            display: inline-block;
            padding: 4px 16px;
            background: var(--accent);
            color: var(--primary-dark);
            font-size: 0.8rem;
            font-weight: 700;
            border-radius: 20px;
            letter-spacing: 0.5px;
            margin-bottom: 1rem;
        }
        .article-hero h1 {
            color: var(--text-white);
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.25;
            max-width: 900px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
            margin-bottom: 1rem;
        }
        .article-hero .post-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 16px 28px;
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.9rem;
        }
        .article-hero .post-meta i {
            margin-right: 6px;
            color: var(--accent);
        }
        .article-hero .post-meta .meta-item {
            display: flex;
            align-items: center;
        }

        /* ===== 文章主体 ===== */
        .article-main {
            padding: 3rem 0 var(--spacing-section);
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 40px;
        }
        .article-content {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 2.5rem;
            overflow: hidden;
        }
        .article-content .featured-image {
            width: 100%;
            border-radius: var(--radius-sm);
            margin-bottom: 2rem;
            object-fit: cover;
            max-height: 480px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
        }
        .article-content .post-body {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--text-secondary);
        }
        .article-content .post-body p {
            margin-bottom: 1.4rem;
        }
        .article-content .post-body h2,
        .article-content .post-body h3 {
            margin-top: 2rem;
            margin-bottom: 0.8rem;
            color: var(--text-primary);
        }
        .article-content .post-body h2 {
            font-size: 1.6rem;
        }
        .article-content .post-body h3 {
            font-size: 1.25rem;
        }
        .article-content .post-body ul,
        .article-content .post-body ol {
            margin: 1rem 0 1.4rem 1.6rem;
            color: var(--text-secondary);
        }
        .article-content .post-body li {
            margin-bottom: 0.5rem;
            list-style: disc;
        }
        .article-content .post-body ol li {
            list-style: decimal;
        }
        .article-content .post-body blockquote {
            border-left: 4px solid var(--accent);
            padding: 1rem 1.6rem;
            margin: 1.6rem 0;
            background: rgba(240, 180, 41, 0.06);
            border-radius: 0 var(--radius-xs) var(--radius-xs) 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-content .post-body img {
            border-radius: var(--radius-sm);
            margin: 1.6rem 0;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
        }
        .article-content .post-body a {
            color: var(--secondary);
            text-decoration: underline;
            text-underline-offset: 2px;
        }
        .article-content .post-body a:hover {
            color: var(--accent-dark);
        }

        /* ===== 文章底部标签 & 分享 ===== */
        .post-footer {
            margin-top: 2.5rem;
            padding-top: 2rem;
            border-top: 1px solid var(--border);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
        }
        .post-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .post-tags .tag {
            padding: 4px 14px;
            background: var(--bg-section-alt);
            color: var(--text-secondary);
            font-size: 0.8rem;
            border-radius: 20px;
            transition: background var(--transition), color var(--transition);
        }
        .post-tags .tag:hover {
            background: var(--accent);
            color: var(--primary-dark);
        }
        .post-share {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text-light);
            font-size: 0.9rem;
        }
        .post-share a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: var(--bg-section-alt);
            color: var(--text-secondary);
            font-size: 1rem;
            transition: background var(--transition), color var(--transition), transform var(--transition);
        }
        .post-share a:hover {
            background: var(--accent);
            color: var(--primary-dark);
            transform: translateY(-2px);
        }

        /* ===== 侧边栏 ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 28px;
        }
        .sidebar-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 1.6rem 1.8rem;
        }
        .sidebar-card h3 {
            font-size: 1.1rem;
            margin-bottom: 1.2rem;
            position: relative;
            padding-bottom: 0.6rem;
            border-bottom: 2px solid var(--accent);
            display: inline-block;
        }
        .sidebar-card .recent-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .sidebar-card .recent-item {
            display: flex;
            gap: 12px;
            align-items: flex-start;
            padding-bottom: 14px;
            border-bottom: 1px solid var(--border-light);
        }
        .sidebar-card .recent-item:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }
        .sidebar-card .recent-item img {
            width: 64px;
            height: 64px;
            border-radius: var(--radius-xs);
            object-fit: cover;
            flex-shrink: 0;
        }
        .sidebar-card .recent-item .recent-info {
            flex: 1;
            min-width: 0;
        }
        .sidebar-card .recent-item .recent-info a {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-primary);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            transition: color var(--transition);
        }
        .sidebar-card .recent-item .recent-info a:hover {
            color: var(--accent);
        }
        .sidebar-card .recent-item .recent-info .recent-date {
            font-size: 0.78rem;
            color: var(--text-light);
            margin-top: 4px;
        }
        .sidebar-cta {
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: var(--text-white);
            border-radius: var(--radius);
            padding: 2rem 1.8rem;
            text-align: center;
            box-shadow: var(--shadow-lg);
        }
        .sidebar-cta h3 {
            color: var(--text-white);
            border-bottom: none;
            margin-bottom: 0.8rem;
            font-size: 1.2rem;
        }
        .sidebar-cta p {
            color: rgba(255, 255, 255, 0.75);
            font-size: 0.9rem;
            margin-bottom: 1.4rem;
        }
        .sidebar-cta .btn {
            display: inline-block;
            padding: 10px 28px;
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 700;
            border-radius: 30px;
            font-size: 0.9rem;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
        }
        .sidebar-cta .btn:hover {
            background: var(--accent-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(240, 180, 41, 0.35);
            color: var(--primary-dark);
        }

        /* ===== 相关推荐 ===== */
        .related-section {
            padding: 0 0 var(--spacing-section);
        }
        .related-section .section-title {
            text-align: center;
            margin-bottom: 2.5rem;
        }
        .related-section .section-title h2 {
            font-size: 1.8rem;
            margin-bottom: 0.5rem;
        }
        .related-section .section-title p {
            color: var(--text-light);
            font-size: 1rem;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .related-card img {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }
        .related-card .related-body {
            padding: 1.2rem 1.4rem 1.4rem;
        }
        .related-card .related-body .related-cat {
            font-size: 0.75rem;
            color: var(--accent-dark);
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 0.4rem;
        }
        .related-card .related-body h3 {
            font-size: 1.05rem;
            margin-bottom: 0.4rem;
        }
        .related-card .related-body h3 a {
            color: var(--text-primary);
            transition: color var(--transition);
        }
        .related-card .related-body h3 a:hover {
            color: var(--accent);
        }
        .related-card .related-body .related-excerpt {
            font-size: 0.88rem;
            color: var(--text-light);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 0.6rem;
        }
        .related-card .related-body .related-date {
            font-size: 0.78rem;
            color: var(--text-light);
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 0 0 var(--spacing-section);
            background: transparent;
        }
        .faq-section .section-title {
            text-align: center;
            margin-bottom: 2.5rem;
        }
        .faq-section .section-title h2 {
            font-size: 1.8rem;
            margin-bottom: 0.5rem;
        }
        .faq-grid {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-hover);
        }
        .faq-question {
            width: 100%;
            padding: 1.2rem 1.6rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            background: transparent;
            text-align: left;
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: rgba(240, 180, 41, 0.04);
        }
        .faq-question i {
            color: var(--accent);
            transition: transform var(--transition);
            font-size: 0.9rem;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 1.6rem;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
            background: rgba(255, 255, 255, 0.5);
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 1.6rem 1.4rem;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 0 0 var(--spacing-section);
        }
        .cta-box {
            background: linear-gradient(135deg, var(--primary), #1a2a4a);
            border-radius: var(--radius);
            padding: 3.5rem 3rem;
            text-align: center;
            box-shadow: var(--shadow-lg);
            position: relative;
            overflow: hidden;
        }
        .cta-box::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.08;
            z-index: 0;
        }
        .cta-box .container {
            position: relative;
            z-index: 1;
        }
        .cta-box h2 {
            color: var(--text-white);
            font-size: 2rem;
            margin-bottom: 0.8rem;
        }
        .cta-box p {
            color: rgba(255, 255, 255, 0.75);
            font-size: 1.05rem;
            max-width: 640px;
            margin: 0 auto 1.6rem;
        }
        .cta-box .btn-group {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .cta-box .btn-primary {
            display: inline-block;
            padding: 14px 36px;
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 700;
            border-radius: 30px;
            font-size: 1rem;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
        }
        .cta-box .btn-primary:hover {
            background: var(--accent-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(240, 180, 41, 0.35);
            color: var(--primary-dark);
        }
        .cta-box .btn-secondary {
            display: inline-block;
            padding: 14px 36px;
            background: rgba(255, 255, 255, 0.12);
            color: var(--text-white);
            font-weight: 600;
            border-radius: 30px;
            font-size: 1rem;
            border: 1px solid rgba(255, 255, 255, 0.2);
            transition: background var(--transition), transform var(--transition);
        }
        .cta-box .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.2);
            transform: translateY(-2px);
            color: var(--text-white);
        }

        /* ===== 内容未找到 ===== */
        .not-found-box {
            text-align: center;
            padding: 3rem 2rem;
        }
        .not-found-box i {
            font-size: 3.5rem;
            color: var(--text-light);
            margin-bottom: 1.2rem;
        }
        .not-found-box h2 {
            font-size: 1.6rem;
            margin-bottom: 0.8rem;
            color: var(--text-primary);
        }
        .not-found-box p {
            color: var(--text-light);
            margin-bottom: 1.6rem;
        }
        .not-found-box .btn-back {
            display: inline-block;
            padding: 12px 32px;
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 700;
            border-radius: 30px;
            transition: background var(--transition), transform var(--transition);
        }
        .not-found-box .btn-back:hover {
            background: var(--accent-light);
            transform: translateY(-2px);
            color: var(--primary-dark);
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 4rem 0 0;
        }
        .footer .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 32px;
            padding-bottom: 2.5rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer .footer-brand .logo {
            font-size: 1.4rem;
            margin-bottom: 0.8rem;
            padding: 0;
            color: var(--text-white);
        }
        .footer .footer-brand .logo i {
            color: var(--accent);
        }
        .footer .footer-brand p {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 300px;
        }
        .footer h4 {
            color: var(--text-white);
            font-size: 1rem;
            margin-bottom: 1.2rem;
            font-weight: 600;
        }
        .footer .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer .footer-links a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            transition: color var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .footer .footer-links a:hover {
            color: var(--accent);
        }
        .footer .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1.6rem 0;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
        }
        .footer .footer-bottom span {
            opacity: 0.7;
        }
        .footer .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            color: rgba(255, 255, 255, 0.6);
            font-size: 1rem;
            transition: background var(--transition), color var(--transition);
        }
        .footer .footer-social a:hover {
            background: var(--accent);
            color: var(--primary-dark);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .article-layout {
                grid-template-columns: 1fr;
            }
            .article-sidebar {
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            :root {
                --spacing-section: 3rem;
                --header-height: 64px;
            }
            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            .nav-left,
            .nav-right {
                display: none;
            }
            .nav-toggle {
                display: block;
            }
            .mobile-menu {
                display: block;
            }
            .article-hero {
                min-height: 240px;
                padding: calc(var(--header-height) + 1.2rem) 0 2rem;
            }
            .article-hero h1 {
                font-size: 1.6rem;
            }
            .article-hero .post-meta {
                font-size: 0.82rem;
                gap: 10px 18px;
            }
            .article-content {
                padding: 1.6rem;
            }
            .article-content .post-body {
                font-size: 0.98rem;
            }
            .article-sidebar {
                grid-template-columns: 1fr;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .cta-box {
                padding: 2.5rem 1.6rem;
            }
            .cta-box h2 {
                font-size: 1.4rem;
            }
            .footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .post-footer {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .article-hero h1 {
                font-size: 1.3rem;
            }
            .article-content {
                padding: 1.2rem;
            }
            .article-content .featured-image {
                max-height: 220px;
            }
            .sidebar-card {
                padding: 1.2rem 1.2rem;
            }
            .related-card img {
                height: 140px;
            }
            .cta-box .btn-group {
                flex-direction: column;
                align-items: center;
            }
            .cta-box .btn-primary,
            .cta-box .btn-secondary {
                width: 100%;
                max-width: 280px;
                text-align: center;
            }
        }