/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a1a3e;
            --primary-dark: #0f0f2a;
            --primary-light: #2d2d5e;
            --primary-rgb: 26, 26, 62;
            --secondary: #f0a500;
            --secondary-light: #ffc833;
            --secondary-dark: #d49200;
            --accent: #ff6b35;
            --accent-light: #ff8a5c;
            --bg: #f8f9fb;
            --bg-alt: #eef0f5;
            --bg-dark: #0f0f23;
            --text: #1a1a2e;
            --text-light: #6c757d;
            --text-white: #ffffff;
            --text-muted: #8e95a5;
            --border: #e2e5ea;
            --border-light: #f0f2f6;
            --shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
            --shadow-hover: 0 12px 48px rgba(0, 0, 0, 0.10);
            --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.08);
            --radius: 16px;
            --radius-sm: 8px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ===== 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-family);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        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 {
            font-weight: 700;
            line-height: 1.3;
            color: var(--primary);
        }
        h1 {
            font-size: 2.8rem;
        }
        h2 {
            font-size: 2rem;
        }
        h3 {
            font-size: 1.4rem;
        }
        h4 {
            font-size: 1.15rem;
        }
        p {
            margin-bottom: 1rem;
        }
        p:last-child {
            margin-bottom: 0;
        }

        /* ===== Container ===== */
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .container-narrow {
            max-width: 900px;
        }
        .container-wide {
            max-width: 1360px;
        }

        /* ===== Utility ===== */
        .section-padding {
            padding: 80px 0;
        }
        .section-padding-sm {
            padding: 48px 0;
        }
        .section-title {
            text-align: center;
            margin-bottom: 16px;
        }
        .section-title h2 {
            display: inline-block;
            position: relative;
        }
        .section-title h2::after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background: var(--secondary);
            border-radius: 4px;
            margin: 12px auto 0;
        }
        .section-subtitle {
            text-align: center;
            color: var(--text-light);
            font-size: 1.1rem;
            max-width: 640px;
            margin: 0 auto 48px;
        }
        .text-center {
            text-align: center;
        }
        .text-muted {
            color: var(--text-light);
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 32px;
            font-size: 1rem;
            font-weight: 600;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            border: 2px solid transparent;
            white-space: nowrap;
            min-height: 48px;
        }
        .btn-primary {
            background: var(--secondary);
            color: var(--primary-dark);
            border-color: var(--secondary);
        }
        .btn-primary:hover {
            background: var(--secondary-light);
            border-color: var(--secondary-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(240, 165, 0, 0.35);
        }
        .btn-primary:focus-visible {
            outline: 3px solid rgba(240, 165, 0, 0.5);
            outline-offset: 2px;
        }
        .btn-outline {
            background: transparent;
            color: var(--text-white);
            border-color: rgba(255, 255, 255, 0.5);
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.15);
            border-color: var(--text-white);
            transform: translateY(-2px);
        }
        .btn-outline:focus-visible {
            outline: 3px solid rgba(255, 255, 255, 0.5);
            outline-offset: 2px;
        }
        .btn-accent {
            background: var(--accent);
            color: var(--text-white);
            border-color: var(--accent);
        }
        .btn-accent:hover {
            background: var(--accent-light);
            border-color: var(--accent-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(255, 107, 53, 0.35);
        }
        .btn-accent:focus-visible {
            outline: 3px solid rgba(255, 107, 53, 0.5);
            outline-offset: 2px;
        }
        .btn-sm {
            padding: 8px 20px;
            font-size: 0.875rem;
            min-height: 40px;
        }
        .btn-lg {
            padding: 16px 44px;
            font-size: 1.15rem;
            min-height: 56px;
            border-radius: var(--radius);
        }
        .btn-block {
            width: 100%;
        }

        /* ===== Badge / Tag ===== */
        .badge {
            display: inline-block;
            padding: 4px 14px;
            font-size: 0.8rem;
            font-weight: 600;
            border-radius: 50px;
            background: var(--bg-alt);
            color: var(--text-light);
            transition: var(--transition);
        }
        .badge-secondary {
            background: rgba(240, 165, 0, 0.15);
            color: var(--secondary-dark);
        }
        .badge-accent {
            background: rgba(255, 107, 53, 0.12);
            color: var(--accent);
        }
        .badge-primary {
            background: rgba(26, 26, 62, 0.08);
            color: var(--primary);
        }
        .badge-sm {
            padding: 2px 10px;
            font-size: 0.72rem;
        }

        /* ===== Card ===== */
        .card {
            background: var(--text-white);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            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-body-sm {
            padding: 16px 20px;
        }
        .card-title {
            font-size: 1.15rem;
            margin-bottom: 8px;
            color: var(--primary);
        }
        .card-title a:hover {
            color: var(--secondary-dark);
        }
        .card-text {
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.6;
        }
        .card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-top: 12px;
        }
        .card-meta i {
            font-size: 0.8rem;
        }
        .card-footer {
            padding: 16px 24px;
            border-top: 1px solid var(--border-light);
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        /* ===== Header / Nav ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background: rgba(255, 255, 255, 0.94);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .header.scrolled {
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.06);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .header-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.5px;
        }
        .header-logo i {
            color: var(--secondary);
            font-size: 1.5rem;
        }
        .header-logo:hover {
            color: var(--primary-light);
        }
        .header-logo span {
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-list a {
            display: block;
            padding: 8px 18px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text);
            border-radius: var(--radius-sm);
            transition: var(--transition);
            position: relative;
        }
        .nav-list a:hover {
            background: var(--bg-alt);
            color: var(--primary);
        }
        .nav-list a.active {
            color: var(--secondary-dark);
            background: rgba(240, 165, 0, 0.08);
        }
        .nav-list a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--secondary);
            border-radius: 4px;
        }
        .nav-cta {
            margin-left: 12px;
        }
        .nav-cta .btn {
            padding: 10px 24px;
            min-height: 42px;
            font-size: 0.9rem;
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            background: none;
            border: none;
            cursor: pointer;
        }
        .nav-toggle span {
            display: block;
            width: 26px;
            height: 3px;
            background: var(--primary);
            border-radius: 4px;
            transition: var(--transition);
        }
        .nav-toggle.active span:nth-child(1) {
            transform: translateY(8px) rotate(45deg);
        }
        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.active span:nth-child(3) {
            transform: translateY(-8px) rotate(-45deg);
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 90vh;
            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: 0.3;
            transform: scale(1.05);
            transition: transform 0.6s ease;
        }
        .hero:hover .hero-bg {
            transform: scale(1);
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 15, 35, 0.88) 0%, rgba(26, 26, 62, 0.70) 60%, rgba(15, 15, 35, 0.88) 100%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 820px;
        }
        .hero-badge {
            display: inline-block;
            padding: 6px 20px;
            font-size: 0.85rem;
            font-weight: 600;
            background: rgba(240, 165, 0, 0.2);
            color: var(--secondary-light);
            border-radius: 50px;
            margin-bottom: 24px;
            backdrop-filter: blur(4px);
            border: 1px solid rgba(240, 165, 0, 0.2);
        }
        .hero h1 {
            font-size: 3.4rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 20px;
            line-height: 1.2;
            letter-spacing: -0.5px;
        }
        .hero h1 .highlight {
            background: linear-gradient(135deg, var(--secondary), var(--secondary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero p {
            font-size: 1.2rem;
            color: rgba(255, 255, 255, 0.75);
            max-width: 640px;
            margin: 0 auto 36px;
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }
        .hero-actions .btn {
            font-size: 1.05rem;
            padding: 14px 38px;
            min-height: 54px;
        }
        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
            justify-content: center;
            margin-top: 56px;
        }
        .hero-stat {
            text-align: center;
        }
        .hero-stat-number {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--secondary-light);
            line-height: 1.2;
        }
        .hero-stat-label {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
            margin-top: 4px;
        }

        /* ===== Features Section ===== */
        .features-section {
            background: var(--text-white);
        }
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
        }
        .feature-card {
            text-align: center;
            padding: 40px 28px;
            border-radius: var(--radius);
            background: var(--bg);
            transition: var(--transition);
            border: 1px solid var(--border-light);
        }
        .feature-card:hover {
            background: var(--text-white);
            border-color: var(--border);
            box-shadow: var(--shadow-hover);
            transform: translateY(-6px);
        }
        .feature-icon {
            width: 72px;
            height: 72px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            border-radius: 50%;
            font-size: 2rem;
            color: var(--text-white);
            background: var(--primary);
        }
        .feature-card:nth-child(1) .feature-icon {
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
        }
        .feature-card:nth-child(2) .feature-icon {
            background: linear-gradient(135deg, var(--secondary), var(--secondary-dark));
        }
        .feature-card:nth-child(3) .feature-icon {
            background: linear-gradient(135deg, var(--accent), #e85d2c);
        }
        .feature-card h3 {
            font-size: 1.25rem;
            margin-bottom: 12px;
        }
        .feature-card p {
            color: var(--text-light);
            font-size: 0.95rem;
        }

        /* ===== Category Section ===== */
        .category-section {
            background: var(--bg);
        }
        .category-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 32px;
        }
        .category-card {
            position: relative;
            border-radius: var(--radius);
            overflow: hidden;
            background: var(--text-white);
            box-shadow: var(--shadow);
            transition: var(--transition);
            min-height: 280px;
            display: flex;
            flex-direction: column;
        }
        .category-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .category-card-img {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
        }
        .category-card-body {
            padding: 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .category-card-body h3 {
            font-size: 1.3rem;
            margin-bottom: 8px;
        }
        .category-card-body h3 a:hover {
            color: var(--secondary-dark);
        }
        .category-card-body p {
            color: var(--text-light);
            font-size: 0.95rem;
            flex: 1;
        }
        .category-card-body .btn {
            align-self: flex-start;
            margin-top: 16px;
        }
        .category-tag {
            position: absolute;
            top: 16px;
            left: 16px;
            z-index: 2;
        }

        /* ===== Latest Posts Section ===== */
        .posts-section {
            background: var(--text-white);
        }
        .posts-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .post-card {
            background: var(--text-white);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            transition: var(--transition);
            overflow: hidden;
            border: 1px solid var(--border-light);
        }
        .post-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: var(--border);
        }
        .post-card-img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            display: block;
        }
        .post-card-body {
            padding: 20px 22px 22px;
        }
        .post-card-body .badge {
            margin-bottom: 10px;
        }
        .post-card-body h3 {
            font-size: 1.1rem;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .post-card-body h3 a:hover {
            color: var(--secondary-dark);
        }
        .post-card-body .card-text {
            font-size: 0.9rem;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .post-card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-top: 14px;
            padding-top: 14px;
            border-top: 1px solid var(--border-light);
        }
        .post-card-meta i {
            margin-right: 4px;
            font-size: 0.75rem;
        }
        .posts-empty {
            text-align: center;
            padding: 48px 24px;
            color: var(--text-light);
            font-size: 1.05rem;
            background: var(--bg);
            border-radius: var(--radius);
            grid-column: 1 / -1;
        }
        .posts-empty i {
            font-size: 2.4rem;
            color: var(--text-muted);
            margin-bottom: 16px;
            display: block;
        }

        /* ===== Recommendations Section ===== */
        .recommend-section {
            background: var(--bg);
        }
        .recommend-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .recommend-card {
            border-radius: var(--radius);
            overflow: hidden;
            background: var(--text-white);
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .recommend-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .recommend-card-img {
            width: 100%;
            aspect-ratio: 4 / 3;
            object-fit: cover;
        }
        .recommend-card-body {
            padding: 16px 20px 20px;
        }
        .recommend-card-body h4 {
            font-size: 1rem;
            margin-bottom: 4px;
        }
        .recommend-card-body .text-muted {
            font-size: 0.85rem;
        }
        .recommend-rating {
            display: flex;
            align-items: center;
            gap: 4px;
            color: var(--secondary);
            font-size: 0.85rem;
            margin-top: 6px;
        }
        .recommend-rating i {
            font-size: 0.8rem;
        }
        .recommend-rating span {
            color: var(--text-light);
            margin-left: 4px;
            font-size: 0.8rem;
        }

        /* ===== Process / Steps Section ===== */
        .process-section {
            background: var(--primary);
            color: var(--text-white);
        }
        .process-section .section-title h2 {
            color: var(--text-white);
        }
        .process-section .section-title h2::after {
            background: var(--secondary-light);
        }
        .process-section .section-subtitle {
            color: rgba(255, 255, 255, 0.7);
        }
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            counter-reset: step;
        }
        .process-step {
            text-align: center;
            position: relative;
            padding: 32px 20px;
        }
        .process-step::after {
            content: '';
            position: absolute;
            top: 48px;
            right: -16px;
            width: 32px;
            height: 2px;
            background: rgba(240, 165, 0, 0.3);
        }
        .process-step:last-child::after {
            display: none;
        }
        .process-step-number {
            width: 64px;
            height: 64px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            border-radius: 50%;
            font-size: 1.6rem;
            font-weight: 800;
            background: rgba(240, 165, 0, 0.15);
            color: var(--secondary-light);
            border: 2px solid rgba(240, 165, 0, 0.25);
            transition: var(--transition);
        }
        .process-step:hover .process-step-number {
            background: rgba(240, 165, 0, 0.25);
            transform: scale(1.05);
        }
        .process-step h4 {
            font-size: 1.1rem;
            color: var(--text-white);
            margin-bottom: 8px;
        }
        .process-step p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.65);
            line-height: 1.6;
        }

        /* ===== FAQ Section ===== */
        .faq-section {
            background: var(--text-white);
        }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            border-bottom: 1px solid var(--border-light);
            padding: 20px 0;
        }
        .faq-item:first-child {
            padding-top: 0;
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            width: 100%;
            text-align: left;
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--primary);
            background: none;
            border: none;
            padding: 8px 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .faq-question:hover {
            color: var(--secondary-dark);
        }
        .faq-question i {
            font-size: 1.1rem;
            color: var(--text-muted);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
            color: var(--secondary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-answer-inner {
            padding: 8px 0 4px;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.08;
        }
        .cta-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 700px;
            margin: 0 auto;
        }
        .cta-content h2 {
            color: var(--text-white);
            font-size: 2.2rem;
            margin-bottom: 16px;
        }
        .cta-content p {
            color: rgba(255, 255, 255, 0.7);
            font-size: 1.1rem;
            margin-bottom: 32px;
        }
        .cta-content .btn {
            font-size: 1.1rem;
            padding: 16px 44px;
        }
        .cta-content .btn:hover {
            transform: translateY(-3px) scale(1.02);
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 56px 0 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .header-logo {
            color: var(--text-white);
            margin-bottom: 16px;
        }
        .footer-brand .header-logo span {
            -webkit-text-fill-color: var(--text-white);
            background: none;
        }
        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 320px;
        }
        .footer-col h4 {
            color: var(--text-white);
            font-size: 1rem;
            margin-bottom: 16px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--secondary-light);
            padding-left: 4px;
        }
        .footer-social {
            display: flex;
            gap: 12px;
            margin-top: 16px;
        }
        .footer-social a {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            color: rgba(255, 255, 255, 0.7);
            transition: var(--transition);
            font-size: 1.1rem;
        }
        .footer-social a:hover {
            background: var(--secondary);
            color: var(--primary-dark);
            transform: translateY(-2px);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom a:hover {
            color: var(--secondary-light);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .features-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 24px;
            }
            .posts-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .recommend-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
            .process-step::after {
                display: none;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .hero h1 {
                font-size: 2.8rem;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-height: 64px;
            }
            .section-padding {
                padding: 48px 0;
            }
            .section-padding-sm {
                padding: 32px 0;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.6rem;
            }
            .container {
                padding: 0 16px;
            }

            /* Nav mobile */
            .nav-toggle {
                display: flex;
            }
            .nav-list {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 16px 24px 24px;
                gap: 4px;
                border-bottom: 1px solid var(--border-light);
                box-shadow: var(--shadow);
                transform: translateY(-110%);
                opacity: 0;
                transition: var(--transition);
                pointer-events: none;
            }
            .nav-list.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-list a {
                padding: 12px 16px;
                width: 100%;
                font-size: 1rem;
            }
            .nav-list a.active::after {
                display: none;
            }
            .nav-cta {
                margin-left: 0;
                margin-top: 8px;
                width: 100%;
            }
            .nav-cta .btn {
                width: 100%;
                justify-content: center;
            }

            .hero {
                min-height: 70vh;
                padding: 100px 16px 60px;
            }
            .hero h1 {
                font-size: 2.2rem;
            }
            .hero p {
                font-size: 1rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .hero-actions .btn {
                width: 100%;
                max-width: 320px;
            }
            .hero-stats {
                gap: 24px;
                margin-top: 40px;
            }
            .hero-stat-number {
                font-size: 1.6rem;
            }

            .features-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .feature-card {
                padding: 28px 20px;
            }

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

            .posts-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .recommend-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }

            .process-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .process-step {
                padding: 20px 16px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }

            .cta-content h2 {
                font-size: 1.7rem;
            }
            .cta-content .btn {
                width: 100%;
                max-width: 320px;
            }
        }

        @media (max-width: 520px) {
            .hero h1 {
                font-size: 1.8rem;
            }
            .hero p {
                font-size: 0.95rem;
            }
            .hero-stats {
                flex-direction: column;
                gap: 16px;
            }
            .recommend-grid {
                grid-template-columns: 1fr;
            }
            .section-title h2 {
                font-size: 1.4rem;
            }
            .btn-lg {
                padding: 14px 28px;
                font-size: 1rem;
                min-height: 48px;
            }
            .faq-question {
                font-size: 0.95rem;
            }
        }

        /* ===== Accessibility ===== */
        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: 0.01ms !important;
                transition-duration: 0.01ms !important;
            }
        }
        :focus-visible {
            outline: 3px solid rgba(240, 165, 0, 0.5);
            outline-offset: 2px;
        }

        /* ===== Scrollbar ===== */
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--text-muted);
            border-radius: 8px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--text-light);
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #6C3BF5;
            --primary-dark: #5228D9;
            --primary-light: #8B5CF6;
            --primary-gradient: linear-gradient(135deg, #6C3BF5 0%, #8B5CF6 100%);
            --secondary: #F59E0B;
            --secondary-light: #FCD34D;
            --accent: #EC4899;
            --bg-dark: #0F0A1E;
            --bg-darker: #0A0615;
            --bg-card: #1A122E;
            --bg-card-hover: #221838;
            --bg-surface: #2D1F4A;
            --text-primary: #F5F0FF;
            --text-secondary: #C4B5E3;
            --text-muted: #8B7AAF;
            --border-color: rgba(139, 92, 246, 0.2);
            --border-hover: rgba(139, 92, 246, 0.4);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(108, 59, 245, 0.1);
            --shadow-md: 0 8px 30px rgba(108, 59, 245, 0.15);
            --shadow-lg: 0 20px 60px rgba(108, 59, 245, 0.2);
            --shadow-glow: 0 0 40px rgba(108, 59, 245, 0.25);
            --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
            --header-h: 72px;
        }

        /* ===== 基础 Reset ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-sans);
            background: var(--bg-dark);
            color: var(--text-primary);
            line-height: 1.7;
            overflow-x: hidden;
            min-height: 100vh;
        }
        a { color: var(--primary-light); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--secondary); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        button, input, select, textarea { font-family: inherit; font-size: 1rem; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text-primary); }
        h1 { font-size: clamp(2rem, 5vw, 3.2rem); }
        h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); }
        h3 { font-size: clamp(1.2rem, 2.5vw, 1.6rem); }
        h4 { font-size: 1.1rem; }
        p { margin-bottom: 0.8rem; color: var(--text-secondary); }
        .container { width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }
        .section-padding { padding: 80px 0; }
        .section-title { text-align: center; margin-bottom: 48px; }
        .section-title h2 { display: inline-block; position: relative; }
        .section-title h2::after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background: var(--primary-gradient);
            border-radius: 4px;
            margin: 12px auto 0;
        }
        .section-title p { max-width: 640px; margin: 16px auto 0; font-size: 1.05rem; }

        /* ===== Header 导航 ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(15, 10, 30, 0.85);
            backdrop-filter: blur(20px) saturate(1.4);
            border-bottom: 1px solid var(--border-color);
            height: var(--header-h);
            transition: background var(--transition), border-color var(--transition);
        }
        .header.scrolled { background: rgba(10, 6, 21, 0.95); border-color: var(--border-hover); }
        .header-inner { display: flex; align-items: center; justify-content: space-between; height: var(--header-h); }
        .header-logo {
            display: flex; align-items: center; gap: 10px;
            font-size: 1.3rem; font-weight: 800; color: var(--text-primary);
            letter-spacing: -0.5px;
        }
        .header-logo i { font-size: 1.5rem; color: var(--primary-light); }
        .header-logo span { background: var(--primary-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .header-logo:hover { opacity: 0.9; }
        .nav-list { display: flex; align-items: center; gap: 8px; }
        .nav-list a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition);
            position: relative;
        }
        .nav-list a:hover { color: var(--text-primary); background: rgba(139, 92, 246, 0.1); }
        .nav-list a.active { color: var(--text-primary); background: rgba(139, 92, 246, 0.15); }
        .nav-list a.active::after {
            content: '';
            position: absolute; bottom: 2px; left: 50%; transform: translateX(-50%);
            width: 20px; height: 3px; background: var(--primary-gradient); border-radius: 4px;
        }
        .nav-cta { margin-left: 12px; }
        .nav-cta .btn { padding: 10px 24px; font-size: 0.88rem; font-weight: 600; border-radius: var(--radius-sm); }
        .nav-cta .btn i { margin-right: 6px; font-size: 0.8rem; }
        .nav-toggle {
            display: none; flex-direction: column; gap: 5px;
            background: none; border: none; cursor: pointer; padding: 8px;
        }
        .nav-toggle span { display: block; width: 26px; height: 2.5px; background: var(--text-primary); border-radius: 4px; transition: all var(--transition); }
        .nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
        .nav-toggle.active span:nth-child(2) { opacity: 0; }
        .nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

        /* ===== Banner ===== */
        .banner {
            position: relative;
            padding: 140px 0 80px;
            background: var(--bg-darker);
            overflow: hidden;
            min-height: 360px;
            display: flex;
            align-items: center;
        }
        .banner-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            opacity: 0.3;
            z-index: 0;
        }
        .banner-bg::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,10,30,0.92) 0%, rgba(108,59,245,0.3) 50%, rgba(15,10,30,0.85) 100%);
        }
        .banner-content { position: relative; z-index: 1; text-align: center; max-width: 800px; margin: 0 auto; }
        .banner-content h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); font-weight: 900; margin-bottom: 16px; }
        .banner-content h1 span { background: var(--primary-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .banner-content p { font-size: 1.1rem; color: var(--text-secondary); max-width: 600px; margin: 0 auto 24px; }
        .banner-tags { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; }
        .banner-tags .tag {
            padding: 6px 18px;
            background: rgba(139, 92, 246, 0.12);
            border: 1px solid var(--border-color);
            border-radius: 50px;
            font-size: 0.82rem;
            color: var(--text-secondary);
            transition: all var(--transition);
        }
        .banner-tags .tag:hover { background: rgba(139, 92, 246, 0.2); border-color: var(--border-hover); color: var(--text-primary); }

        /* ===== 卡片通用 ===== */
        .card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition);
        }
        .card:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-hover);
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .card-img { width: 100%; aspect-ratio: 16/10; object-fit: cover; display: block; }
        .card-body { padding: 20px 22px 24px; }
        .card-body h3 { font-size: 1.1rem; margin-bottom: 8px; }
        .card-body h3 a { color: var(--text-primary); }
        .card-body h3 a:hover { color: var(--primary-light); }
        .card-body p { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 12px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .card-meta { display: flex; align-items: center; gap: 16px; font-size: 0.8rem; color: var(--text-muted); }
        .card-meta i { margin-right: 4px; }
        .card-tag {
            display: inline-block;
            padding: 2px 12px;
            background: rgba(245, 158, 11, 0.12);
            border: 1px solid rgba(245, 158, 11, 0.2);
            border-radius: 50px;
            font-size: 0.72rem;
            color: var(--secondary);
            font-weight: 500;
        }
        .card-tag.primary { background: rgba(108, 59, 245, 0.12); border-color: rgba(108, 59, 245, 0.2); color: var(--primary-light); }
        .card-tag.accent { background: rgba(236, 72, 153, 0.12); border-color: rgba(236, 72, 153, 0.2); color: var(--accent); }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex; align-items: center; justify-content: center; gap: 8px;
            padding: 12px 32px;
            font-weight: 600;
            border: none;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: all var(--transition);
            font-size: 0.95rem;
            text-align: center;
            line-height: 1.2;
        }
        .btn-primary {
            background: var(--primary-gradient);
            color: #fff;
            box-shadow: var(--shadow-sm);
        }
        .btn-primary:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); color: #fff; }
        .btn-primary:active { transform: translateY(0); }
        .btn-secondary {
            background: rgba(139, 92, 246, 0.12);
            color: var(--text-primary);
            border: 1px solid var(--border-color);
        }
        .btn-secondary:hover { background: rgba(139, 92, 246, 0.2); border-color: var(--border-hover); color: var(--text-primary); transform: translateY(-2px); }
        .btn-outline {
            background: transparent;
            color: var(--text-primary);
            border: 1px solid var(--border-color);
        }
        .btn-outline:hover { border-color: var(--primary-light); color: var(--primary-light); transform: translateY(-2px); }
        .btn-sm { padding: 8px 20px; font-size: 0.82rem; }
        .btn-lg { padding: 16px 42px; font-size: 1.05rem; border-radius: var(--radius-md); }
        .btn .fa-arrow-right { transition: transform var(--transition); }
        .btn:hover .fa-arrow-right { transform: translateX(4px); }

        /* ===== 网格系统 ===== */
        .grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
        .grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
        .grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }

        /* ===== 分类筛选 ===== */
        .filter-bar {
            display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-bottom: 40px;
        }
        .filter-btn {
            padding: 8px 24px;
            background: rgba(139, 92, 246, 0.08);
            border: 1px solid var(--border-color);
            border-radius: 50px;
            color: var(--text-secondary);
            font-size: 0.88rem;
            font-weight: 500;
            cursor: pointer;
            transition: all var(--transition);
        }
        .filter-btn:hover { background: rgba(139, 92, 246, 0.15); border-color: var(--border-hover); color: var(--text-primary); }
        .filter-btn.active { background: var(--primary-gradient); border-color: transparent; color: #fff; box-shadow: var(--shadow-sm); }

        /* ===== 特色区块 ===== */
        .feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            text-align: center;
            transition: all var(--transition);
        }
        .feature-card:hover { background: var(--bg-card-hover); border-color: var(--border-hover); transform: translateY(-4px); box-shadow: var(--shadow-md); }
        .feature-icon {
            width: 60px; height: 60px; margin: 0 auto 16px;
            background: rgba(108, 59, 245, 0.12);
            border-radius: 50%;
            display: flex; align-items: center; justify-content: center;
            font-size: 1.6rem; color: var(--primary-light);
        }
        .feature-card h3 { font-size: 1.05rem; margin-bottom: 8px; }
        .feature-card p { font-size: 0.88rem; color: var(--text-muted); margin-bottom: 0; }

        /* ===== 排行榜/列表 ===== */
        .rank-list { counter-reset: rank; }
        .rank-item {
            display: flex; align-items: center; gap: 16px;
            padding: 16px 20px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            margin-bottom: 10px;
            transition: all var(--transition);
        }
        .rank-item:hover { background: var(--bg-card-hover); border-color: var(--border-hover); transform: translateX(4px); }
        .rank-item::before {
            counter-increment: rank;
            content: counter(rank);
            width: 32px; height: 32px;
            background: rgba(108, 59, 245, 0.12);
            border-radius: 50%;
            display: flex; align-items: center; justify-content: center;
            font-weight: 700; font-size: 0.9rem;
            color: var(--primary-light);
            flex-shrink: 0;
        }
        .rank-item:nth-child(1)::before { background: var(--primary-gradient); color: #fff; }
        .rank-item:nth-child(2)::before { background: rgba(245, 158, 11, 0.2); color: var(--secondary); }
        .rank-item:nth-child(3)::before { background: rgba(236, 72, 153, 0.15); color: var(--accent); }
        .rank-info { flex: 1; }
        .rank-info h4 { font-size: 1rem; margin-bottom: 2px; }
        .rank-info p { font-size: 0.82rem; color: var(--text-muted); margin-bottom: 0; }
        .rank-score { font-weight: 700; color: var(--secondary); font-size: 1.1rem; }

        /* ===== FAQ ===== */
        .faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover { border-color: var(--border-hover); }
        .faq-question {
            padding: 18px 24px;
            display: flex; align-items: center; justify-content: space-between;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-primary);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            transition: background var(--transition);
        }
        .faq-question:hover { background: rgba(139, 92, 246, 0.05); }
        .faq-question i { transition: transform var(--transition); color: var(--primary-light); font-size: 0.9rem; }
        .faq-item.open .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            padding: 0 24px 18px;
            font-size: 0.92rem;
            color: var(--text-secondary);
            display: none;
        }
        .faq-item.open .faq-answer { display: block; }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--bg-darker);
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
            text-align: center;
        }
        .cta-section h2 { margin-bottom: 12px; }
        .cta-section p { max-width: 540px; margin: 0 auto 28px; font-size: 1.05rem; }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--bg-darker);
            border-top: 1px solid var(--border-color);
            padding: 60px 0 30px;
        }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
        .footer-brand .header-logo { margin-bottom: 12px; }
        .footer-brand p { font-size: 0.88rem; color: var(--text-muted); max-width: 360px; line-height: 1.7; }
        .footer-social { display: flex; gap: 12px; margin-top: 16px; }
        .footer-social a {
            width: 38px; height: 38px;
            background: rgba(139, 92, 246, 0.08);
            border: 1px solid var(--border-color);
            border-radius: 50%;
            display: flex; align-items: center; justify-content: center;
            color: var(--text-secondary);
            font-size: 1rem;
            transition: all var(--transition);
        }
        .footer-social a:hover { background: var(--primary-gradient); border-color: transparent; color: #fff; transform: translateY(-2px); }
        .footer-col h4 { font-size: 1rem; margin-bottom: 16px; color: var(--text-primary); }
        .footer-col ul { display: flex; flex-direction: column; gap: 8px; }
        .footer-col ul a { font-size: 0.88rem; color: var(--text-muted); transition: all var(--transition); }
        .footer-col ul a:hover { color: var(--primary-light); padding-left: 4px; }
        .footer-bottom {
            padding-top: 24px; margin-top: 24px;
            border-top: 1px solid var(--border-color);
            display: flex; justify-content: space-between; align-items: center;
            flex-wrap: wrap; gap: 12px;
            font-size: 0.82rem; color: var(--text-muted);
        }
        .footer-bottom a { color: var(--text-muted); }
        .footer-bottom a:hover { color: var(--primary-light); }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .grid-4 { grid-template-columns: repeat(2, 1fr); }
            .feature-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
        }
        @media (max-width: 768px) {
            .section-padding { padding: 60px 0; }
            .nav-list {
                position: fixed; top: var(--header-h); left: 0; width: 100%;
                flex-direction: column; background: rgba(10, 6, 21, 0.98);
                backdrop-filter: blur(20px); padding: 20px; gap: 4px;
                border-bottom: 1px solid var(--border-color);
                transform: translateY(-120%); opacity: 0;
                transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
                pointer-events: none;
            }
            .nav-list.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
            .nav-list a { width: 100%; padding: 12px 16px; font-size: 1rem; }
            .nav-list a.active::after { display: none; }
            .nav-cta { width: 100%; margin-left: 0; margin-top: 8px; }
            .nav-cta .btn { width: 100%; justify-content: center; }
            .nav-toggle { display: flex; }
            .banner { padding: 120px 0 60px; min-height: 300px; }
            .grid-2, .grid-3 { grid-template-columns: 1fr; }
            .grid-4 { grid-template-columns: repeat(2, 1fr); }
            .feature-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .filter-bar { gap: 8px; }
            .filter-btn { padding: 6px 16px; font-size: 0.82rem; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .section-padding { padding: 40px 0; }
            .grid-4 { grid-template-columns: 1fr; }
            .banner-content h1 { font-size: 1.8rem; }
            .banner-content p { font-size: 0.95rem; }
            .card-body { padding: 16px; }
            .rank-item { padding: 12px 16px; flex-wrap: wrap; }
            .rank-score { font-size: 1rem; }
            .cta-section h2 { font-size: 1.4rem; }
        }

        /* ===== 动画 ===== */
        @keyframes fadeInUp { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }
        .animate-fade-in { animation: fadeInUp 0.6s ease forwards; }
        .delay-1 { animation-delay: 0.1s; }
        .delay-2 { animation-delay: 0.2s; }
        .delay-3 { animation-delay: 0.3s; }
        .delay-4 { animation-delay: 0.4s; }

        /* ===== 滚动条 ===== */
        ::-webkit-scrollbar { width: 6px; }
        ::-webkit-scrollbar-track { background: var(--bg-darker); }
        ::-webkit-scrollbar-thumb { background: var(--bg-surface); border-radius: 4px; }
        ::-webkit-scrollbar-thumb:hover { background: var(--primary-dark); }

        /* ===== 选中高亮 ===== */
        ::selection { background: rgba(108, 59, 245, 0.3); color: #fff; }

        /* ===== 额外组件 ===== */
        .badge {
            display: inline-block; padding: 2px 12px; border-radius: 50px;
            font-size: 0.72rem; font-weight: 600;
        }
        .badge-primary { background: rgba(108, 59, 245, 0.15); color: var(--primary-light); }
        .badge-hot { background: rgba(245, 158, 11, 0.15); color: var(--secondary); }
        .badge-new { background: rgba(236, 72, 153, 0.15); color: var(--accent); }
        .divider { height: 1px; background: var(--border-color); margin: 40px 0; }
        .text-gradient { background: var(--primary-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .gap-2 { gap: 8px; }
        .gap-3 { gap: 16px; }
        .gap-4 { gap: 24px; }
        .mt-2 { margin-top: 8px; }
        .mt-3 { margin-top: 16px; }
        .mt-4 { margin-top: 24px; }
        .mb-3 { margin-bottom: 16px; }
        .mb-4 { margin-bottom: 24px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }
        .text-center { text-align: center; }
        .text-muted { color: var(--text-muted); }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #6c3ef5;
            --primary-dark: #5228d4;
            --primary-light: #8b6bf8;
            --primary-bg: #f3f0ff;
            --accent: #ff6b35;
            --accent-light: #ff8f5e;
            --bg: #f8f7fc;
            --bg-card: #ffffff;
            --bg-dark: #1a0e2e;
            --bg-footer: #0f0720;
            --text: #1a0e2e;
            --text-light: #6b5f7a;
            --text-white: #fcfaff;
            --border: #e2dcf0;
            --border-light: #f0ecf8;
            --radius: 14px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 6px 28px rgba(108, 62, 245, 0.10);
            --shadow-hover: 0 14px 40px rgba(108, 62, 245, 0.18);
            --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: 72px;
        }

        /* ===== 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);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            padding-top: var(--header-h);
        }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-dark); }
        a:focus-visible { outline: 3px solid var(--primary-light); outline-offset: 2px; border-radius: 4px; }
        button { cursor: pointer; font-family: inherit; border: none; background: none; }
        input, textarea { font-family: inherit; font-size: 1rem; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; color: var(--text); font-weight: 700; }
        h1 { font-size: 2.2rem; }
        h2 { font-size: 1.75rem; }
        h3 { font-size: 1.35rem; }
        h4 { font-size: 1.1rem; }
        p { margin-bottom: 0.8rem; color: var(--text-light); }
        strong { color: var(--text); font-weight: 600; }

        /* ===== Container ===== */
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        /* ===== Header & Navigation ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-light);
            height: var(--header-h);
            box-shadow: 0 2px 20px rgba(108, 62, 245, 0.06);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-h);
        }
        .header-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--primary-dark);
            letter-spacing: -0.5px;
        }
        .header-logo i {
            font-size: 1.8rem;
            color: var(--primary);
            background: var(--primary-bg);
            padding: 8px;
            border-radius: 12px;
            transition: var(--transition);
        }
        .header-logo:hover i {
            background: var(--primary);
            color: #fff;
            transform: scale(1.05) rotate(-6deg);
        }
        .header-logo span { background: linear-gradient(135deg, var(--primary-dark), var(--accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-list a {
            padding: 8px 18px;
            border-radius: 30px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-light);
            position: relative;
            transition: var(--transition);
        }
        .nav-list a:hover { color: var(--primary); background: var(--primary-bg); }
        .nav-list a.active { color: #fff; background: var(--primary); font-weight: 600; box-shadow: 0 4px 14px rgba(108, 62, 245, 0.30); }
        .nav-list a.active:hover { background: var(--primary-dark); }
        .nav-cta { margin-left: 12px; }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 40px;
            font-size: 1rem;
            font-weight: 600;
            transition: var(--transition);
            border: none;
            line-height: 1.2;
            text-align: center;
            justify-content: center;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            box-shadow: 0 4px 16px rgba(108, 62, 245, 0.30);
        }
        .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(108, 62, 245, 0.40); color: #fff; }
        .btn-primary:active { transform: translateY(0); }
        .btn-sm { padding: 8px 20px; font-size: 0.9rem; }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }
        .btn-outline:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }
        .btn-accent {
            background: linear-gradient(135deg, var(--accent), var(--accent-light));
            color: #fff;
            box-shadow: 0 4px 16px rgba(255, 107, 53, 0.30);
        }
        .btn-accent:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(255, 107, 53, 0.40); color: #fff; }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: 8px;
            background: var(--primary-bg);
        }
        .nav-toggle span {
            display: block;
            width: 26px;
            height: 3px;
            background: var(--primary);
            border-radius: 4px;
            transition: var(--transition);
        }
        .nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: rotate(45deg) translate(5px, 6px); }
        .nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
        .nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: rotate(-45deg) translate(5px, -6px); }

        /* ===== Article Page ===== */
        .article-banner {
            background: linear-gradient(135deg, var(--bg-dark) 0%, #2d1560 100%);
            padding: 60px 0 50px;
            position: relative;
            overflow: hidden;
        }
        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.12;
            mix-blend-mode: overlay;
        }
        .article-banner .container { position: relative; z-index: 1; }
        .article-banner .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
            color: rgba(255,255,255,0.6);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .article-banner .breadcrumb a { color: rgba(255,255,255,0.8); }
        .article-banner .breadcrumb a:hover { color: #fff; }
        .article-banner .breadcrumb span { color: rgba(255,255,255,0.4); }
        .article-banner h1 {
            font-size: 2.4rem;
            color: #fff;
            max-width: 900px;
            line-height: 1.3;
            margin-bottom: 18px;
            text-shadow: 0 2px 20px rgba(0,0,0,0.3);
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px 28px;
            align-items: center;
            color: rgba(255,255,255,0.75);
            font-size: 0.95rem;
        }
        .article-meta .tag {
            background: rgba(255,255,255,0.15);
            padding: 4px 14px;
            border-radius: 30px;
            font-size: 0.85rem;
            color: #fff;
            backdrop-filter: blur(4px);
        }
        .article-meta i { margin-right: 6px; opacity: 0.7; }

        .article-section {
            padding: 50px 0 60px;
        }
        .article-content-wrap {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 40px;
        }
        .article-body {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 40px 48px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
        }
        .article-body p {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--text);
            margin-bottom: 1.2rem;
        }
        .article-body h2, .article-body h3 {
            margin-top: 2rem;
            margin-bottom: 0.8rem;
            color: var(--text);
        }
        .article-body h2 { font-size: 1.7rem; border-left: 4px solid var(--primary); padding-left: 16px; }
        .article-body h3 { font-size: 1.35rem; }
        .article-body ul, .article-body ol {
            margin: 1rem 0 1.5rem 1.5rem;
        }
        .article-body li {
            margin-bottom: 0.5rem;
            color: var(--text);
            line-height: 1.7;
        }
        .article-body ul li { list-style: disc; }
        .article-body ol li { list-style: decimal; }
        .article-body a { color: var(--primary); font-weight: 500; border-bottom: 1px solid transparent; }
        .article-body a:hover { border-bottom-color: var(--primary); }
        .article-body img { border-radius: var(--radius); margin: 1.8rem 0; box-shadow: var(--shadow); }
        .article-body blockquote {
            border-left: 4px solid var(--primary);
            background: var(--primary-bg);
            padding: 16px 24px;
            margin: 1.5rem 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-light);
            font-style: italic;
        }
        .article-body .article-featured-img {
            margin: -40px -48px 30px -48px;
            border-radius: var(--radius-lg) var(--radius-lg) 0 0;
            overflow: hidden;
            max-height: 420px;
            object-fit: cover;
            width: calc(100% + 96px);
        }
        .article-divider {
            border: none;
            height: 1px;
            background: var(--border-light);
            margin: 2rem 0;
        }

        /* Sidebar */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 28px;
        }
        .sidebar-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 24px 20px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
        }
        .sidebar-card h3 {
            font-size: 1.15rem;
            margin-bottom: 16px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--primary-bg);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card h3 i { color: var(--primary); }
        .sidebar-list li {
            padding: 10px 0;
            border-bottom: 1px solid var(--border-light);
        }
        .sidebar-list li:last-child { border-bottom: none; }
        .sidebar-list a {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 0.95rem;
            color: var(--text);
            line-height: 1.4;
        }
        .sidebar-list a:hover { color: var(--primary); }
        .sidebar-list a i { color: var(--primary-light); font-size: 0.85rem; margin-top: 4px; flex-shrink: 0; }
        .sidebar-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .sidebar-tags a {
            padding: 5px 14px;
            border-radius: 30px;
            background: var(--primary-bg);
            color: var(--primary-dark);
            font-size: 0.85rem;
            font-weight: 500;
            transition: var(--transition);
        }
        .sidebar-tags a:hover { background: var(--primary); color: #fff; transform: translateY(-1px); }
        .sidebar-cta {
            background: linear-gradient(135deg, var(--bg-dark), #2d1560);
            color: #fff;
            text-align: center;
            padding: 32px 20px;
        }
        .sidebar-cta h3 { color: #fff; border-bottom: none; justify-content: center; }
        .sidebar-cta p { color: rgba(255,255,255,0.7); font-size: 0.95rem; margin-bottom: 18px; }
        .sidebar-cta .btn { width: 100%; }

        /* ===== FAQ Section ===== */
        .article-faq {
            background: var(--bg);
            padding: 50px 0 60px;
        }
        .article-faq h2 {
            text-align: center;
            margin-bottom: 36px;
            font-size: 1.9rem;
        }
        .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);
            padding: 20px 28px;
            box-shadow: 0 2px 10px rgba(108, 62, 245, 0.06);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .faq-item:hover { box-shadow: var(--shadow); }
        .faq-item summary {
            font-size: 1.05rem;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: var(--text);
            list-style: none;
        }
        .faq-item summary::-webkit-details-marker { display: none; }
        .faq-item summary::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 0.85rem;
            color: var(--primary-light);
            transition: var(--transition);
        }
        .faq-item[open] summary::after { transform: rotate(180deg); }
        .faq-item .faq-answer {
            padding-top: 14px;
            color: var(--text-light);
            font-size: 0.98rem;
            line-height: 1.7;
        }

        /* ===== Related / CTA ===== */
        .article-related {
            padding: 50px 0 60px;
            background: var(--bg-card);
        }
        .article-related h2 {
            text-align: center;
            margin-bottom: 36px;
            font-size: 1.8rem;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            gap: 24px;
        }
        .related-card {
            background: var(--bg);
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
        .related-card img { width: 100%; height: 180px; object-fit: cover; border-radius: 0; }
        .related-card .card-body { padding: 18px 20px 20px; }
        .related-card .card-body h3 { font-size: 1.05rem; margin-bottom: 6px; }
        .related-card .card-body h3 a { color: var(--text); }
        .related-card .card-body h3 a:hover { color: var(--primary); }
        .related-card .card-body p { font-size: 0.9rem; color: var(--text-light); margin-bottom: 0; }
        .related-card .card-meta { font-size: 0.82rem; color: var(--text-light); margin-top: 10px; display: flex; gap: 12px; }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-footer);
            color: rgba(255,255,255,0.75);
            padding: 50px 0 0;
            margin-top: auto;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 36px;
            padding-bottom: 30px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .footer-brand .header-logo { margin-bottom: 14px; }
        .footer-brand .header-logo span { -webkit-text-fill-color: #fff; background: none; color: #fff; }
        .footer-brand .header-logo i { background: rgba(255,255,255,0.1); color: #fff; }
        .footer-brand p { font-size: 0.92rem; color: rgba(255,255,255,0.55); max-width: 360px; line-height: 1.7; }
        .footer-social { display: flex; gap: 12px; margin-top: 18px; }
        .footer-social a {
            display: flex; align-items: center; justify-content: center;
            width: 42px; height: 42px; border-radius: 50%;
            background: rgba(255,255,255,0.08);
            color: rgba(255,255,255,0.7);
            font-size: 1.15rem;
            transition: var(--transition);
        }
        .footer-social a:hover { background: var(--primary); color: #fff; transform: translateY(-3px); }
        .footer-col h4 { color: #fff; font-size: 1.05rem; margin-bottom: 16px; font-weight: 600; }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul a { color: rgba(255,255,255,0.55); font-size: 0.92rem; transition: var(--transition); }
        .footer-col ul a:hover { color: #fff; padding-left: 4px; }
        .footer-bottom {
            display: flex; justify-content: space-between; align-items: center;
            padding: 20px 0; flex-wrap: wrap; gap: 12px;
            font-size: 0.85rem; color: rgba(255,255,255,0.4);
        }
        .footer-bottom a { color: rgba(255,255,255,0.5); }
        .footer-bottom a:hover { color: #fff; }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-content-wrap { grid-template-columns: 1fr; }
            .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
        }
        @media (max-width: 768px) {
            .nav-list { 
                position: fixed; top: var(--header-h); left: 0; right: 0; 
                background: rgba(255,255,255,0.98); backdrop-filter: blur(16px);
                flex-direction: column; padding: 20px 24px; gap: 4px;
                border-bottom: 1px solid var(--border-light); 
                box-shadow: 0 10px 40px rgba(0,0,0,0.10);
                transform: translateY(-120%); opacity: 0; pointer-events: none;
                transition: var(--transition); border-radius: 0 0 var(--radius) var(--radius);
            }
            .nav-list.active { transform: translateY(0); opacity: 1; pointer-events: all; }
            .nav-list a { width: 100%; padding: 12px 18px; border-radius: var(--radius-sm); }
            .nav-cta { margin-left: 0; margin-top: 8px; width: 100%; }
            .nav-cta .btn { width: 100%; justify-content: center; }
            .nav-toggle { display: flex; }
            h1 { font-size: 1.7rem; }
            .article-banner h1 { font-size: 1.7rem; }
            .article-body { padding: 24px 20px; }
            .article-body .article-featured-img { margin: -24px -20px 20px -20px; width: calc(100% + 40px); }
            .article-sidebar { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .related-grid { grid-template-columns: 1fr; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .article-banner { padding: 40px 0 36px; }
            .article-banner h1 { font-size: 1.4rem; }
            .article-meta { font-size: 0.85rem; gap: 10px 16px; }
            .article-body { padding: 18px 14px; font-size: 0.95rem; }
            .article-body h2 { font-size: 1.3rem; }
            .btn { padding: 10px 20px; font-size: 0.9rem; }
            .faq-item { padding: 16px 18px; }
            .header-logo span { font-size: 1.1rem; }
        }