/* roulang page: index */
/* ===== 设计变量 ===== */
    :root {
        --primary: #1a1a2e;
        --primary-light: #16213e;
        --secondary: #e94560;
        --secondary-hover: #d63850;
        --accent: #0f3460;
        --gradient-main: linear-gradient(135deg, #1a1a2e 0%, #0f3460 100%);
        --gradient-hero: linear-gradient(135deg, rgba(26,26,46,0.92) 0%, rgba(15,52,96,0.88) 100%);
        --bg-body: #f5f6fa;
        --bg-white: #ffffff;
        --bg-card: #ffffff;
        --bg-dark: #1a1a2e;
        --bg-section-alt: #f0f2f8;
        --text-primary: #1a1a2e;
        --text-body: #3d3d4a;
        --text-weak: #7a7a8a;
        --text-white: #ffffff;
        --text-muted: #a0a0b0;
        --border-light: #e8e8f0;
        --border-card: #f0f0f5;
        --radius-sm: 8px;
        --radius-md: 14px;
        --radius-lg: 20px;
        --radius-xl: 28px;
        --shadow-sm: 0 2px 8px rgba(26,26,46,0.06);
        --shadow-md: 0 8px 30px rgba(26,26,46,0.08);
        --shadow-lg: 0 20px 60px rgba(26,26,46,0.12);
        --shadow-hover: 0 16px 48px rgba(233,69,96,0.14);
        --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'PingFang SC', 'Microsoft YaHei', sans-serif;
        --container-width: 1200px;
        --header-height: 72px;
        --spacing-section: 100px;
        --spacing-block: 60px;
    }

    /* ===== 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-family);
        font-size: 16px;
        line-height: 1.7;
        color: var(--text-body);
        background: var(--bg-body);
        overflow-x: hidden;
    }
    a { color: var(--secondary); text-decoration: none; transition: var(--transition); }
    a:hover { color: var(--secondary-hover); }
    img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
    ul, ol { list-style: none; }
    button, input, textarea { font-family: inherit; font-size: inherit; outline: none; border: none; }
    button { cursor: pointer; }
    h1, h2, h3, h4, h5, h6 { color: var(--text-primary); line-height: 1.3; font-weight: 700; }
    h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); }
    h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); }
    h3 { font-size: clamp(1.2rem, 2.5vw, 1.6rem); }
    h4 { font-size: 1.15rem; }
    p { margin-bottom: 1rem; }
    .container {
        max-width: var(--container-width);
        margin: 0 auto;
        padding: 0 24px;
    }
    .section-padding { padding: var(--spacing-section) 0; }
    .text-center { text-align: center; }

    /* ===== Buttons ===== */
    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        padding: 12px 32px;
        font-weight: 600;
        font-size: 0.95rem;
        border-radius: 50px;
        transition: var(--transition);
        border: 2px solid transparent;
        white-space: nowrap;
    }
    .btn-primary {
        background: var(--secondary);
        color: var(--text-white);
        border-color: var(--secondary);
    }
    .btn-primary:hover {
        background: var(--secondary-hover);
        border-color: var(--secondary-hover);
        color: var(--text-white);
        transform: translateY(-2px);
        box-shadow: 0 8px 24px rgba(233,69,96,0.35);
    }
    .btn-outline {
        background: transparent;
        color: var(--text-white);
        border-color: rgba(255,255,255,0.5);
    }
    .btn-outline:hover {
        background: var(--text-white);
        color: var(--primary);
        border-color: var(--text-white);
        transform: translateY(-2px);
    }
    .btn-ghost {
        background: transparent;
        color: var(--text-body);
        border-color: var(--border-light);
    }
    .btn-ghost:hover {
        background: var(--bg-section-alt);
        border-color: var(--secondary);
        color: var(--secondary);
    }
    .btn-lg { padding: 16px 44px; font-size: 1.05rem; }
    .btn-sm { padding: 8px 20px; font-size: 0.85rem; }

    /* ===== Tags / Badges ===== */
    .badge {
        display: inline-block;
        padding: 4px 14px;
        font-size: 0.78rem;
        font-weight: 600;
        border-radius: 50px;
        background: var(--bg-section-alt);
        color: var(--text-weak);
        transition: var(--transition);
    }
    .badge-secondary {
        background: rgba(233,69,96,0.12);
        color: var(--secondary);
    }
    .badge-primary {
        background: rgba(26,26,46,0.08);
        color: var(--primary);
    }
    .badge-accent {
        background: rgba(15,52,96,0.10);
        color: var(--accent);
    }
    .tag {
        display: inline-block;
        padding: 2px 12px;
        font-size: 0.72rem;
        border-radius: 50px;
        background: var(--bg-section-alt);
        color: var(--text-weak);
        border: 1px solid var(--border-light);
        transition: var(--transition);
    }
    .tag:hover { background: var(--secondary); color: var(--text-white); border-color: var(--secondary); }

    /* ===== Section Titles ===== */
    .section-header {
        margin-bottom: 48px;
    }
    .section-header .subtitle {
        display: inline-block;
        font-size: 0.85rem;
        font-weight: 600;
        text-transform: uppercase;
        letter-spacing: 2px;
        color: var(--secondary);
        margin-bottom: 12px;
    }
    .section-header h2 {
        margin-bottom: 16px;
    }
    .section-header p {
        color: var(--text-weak);
        max-width: 640px;
        margin: 0 auto;
        font-size: 1.05rem;
    }

    /* ===== Header & Navigation ===== */
    .site-header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 1000;
        height: var(--header-height);
        background: rgba(26,26,46,0.96);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border-bottom: 1px solid rgba(255,255,255,0.06);
        transition: var(--transition);
    }
    .site-header.scrolled {
        background: rgba(26,26,46,0.98);
        box-shadow: 0 4px 30px rgba(0,0,0,0.2);
    }
    .header-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: var(--header-height);
        max-width: var(--container-width);
        margin: 0 auto;
        padding: 0 24px;
    }
    .logo {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 1.3rem;
        font-weight: 800;
        color: var(--text-white);
        letter-spacing: -0.5px;
    }
    .logo i {
        font-size: 1.6rem;
        color: var(--secondary);
    }
    .logo span { color: var(--text-white); }
    .logo:hover { color: var(--text-white); opacity: 0.9; }
    .nav-menu {
        display: flex;
        align-items: center;
        gap: 8px;
    }
    .nav-menu a {
        padding: 8px 18px;
        font-size: 0.9rem;
        font-weight: 500;
        color: rgba(255,255,255,0.75);
        border-radius: 50px;
        transition: var(--transition);
        position: relative;
    }
    .nav-menu a:hover { color: var(--text-white); background: rgba(255,255,255,0.08); }
    .nav-menu a.active {
        color: var(--text-white);
        background: rgba(233,69,96,0.20);
    }
    .nav-menu a.active::after {
        content: '';
        position: absolute;
        bottom: 2px;
        left: 50%;
        transform: translateX(-50%);
        width: 20px;
        height: 3px;
        background: var(--secondary);
        border-radius: 2px;
    }
    .header-actions {
        display: flex;
        align-items: center;
        gap: 12px;
    }
    .search-box {
        display: flex;
        align-items: center;
        background: rgba(255,255,255,0.08);
        border-radius: 50px;
        padding: 0 16px;
        border: 1px solid rgba(255,255,255,0.06);
        transition: var(--transition);
    }
    .search-box:focus-within {
        background: rgba(255,255,255,0.14);
        border-color: rgba(233,69,96,0.3);
    }
    .search-box i { color: rgba(255,255,255,0.4); font-size: 0.85rem; }
    .search-box input {
        background: transparent;
        border: none;
        padding: 8px 10px;
        color: var(--text-white);
        font-size: 0.85rem;
        width: 140px;
    }
    .search-box input::placeholder { color: rgba(255,255,255,0.35); }
    .btn-header {
        padding: 8px 22px;
        font-size: 0.85rem;
        font-weight: 600;
        border-radius: 50px;
        background: var(--secondary);
        color: var(--text-white);
        border: none;
        transition: var(--transition);
    }
    .btn-header:hover {
        background: var(--secondary-hover);
        transform: translateY(-1px);
        box-shadow: 0 6px 20px rgba(233,69,96,0.3);
    }
    .mobile-toggle {
        display: none;
        background: transparent;
        border: none;
        color: var(--text-white);
        font-size: 1.5rem;
        padding: 4px 8px;
        cursor: pointer;
    }

    /* ===== Hero ===== */
    .hero {
        position: relative;
        min-height: 92vh;
        display: flex;
        align-items: center;
        justify-content: center;
        background: var(--gradient-main);
        overflow: hidden;
        margin-top: 0;
        padding-top: var(--header-height);
    }
    .hero-bg {
        position: absolute;
        inset: 0;
        background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
        opacity: 0.25;
        transform: scale(1.05);
        animation: heroZoom 20s ease-in-out infinite alternate;
    }
    @keyframes heroZoom {
        0% { transform: scale(1.0); }
        100% { transform: scale(1.08); }
    }
    .hero-overlay {
        position: absolute;
        inset: 0;
        background: var(--gradient-hero);
    }
    .hero-content {
        position: relative;
        z-index: 2;
        text-align: center;
        max-width: 860px;
        padding: 40px 24px 60px;
    }
    .hero-badge {
        display: inline-block;
        padding: 6px 20px;
        font-size: 0.8rem;
        font-weight: 600;
        border-radius: 50px;
        background: rgba(233,69,96,0.20);
        color: #ff8a8a;
        border: 1px solid rgba(233,69,96,0.25);
        margin-bottom: 28px;
        letter-spacing: 1px;
    }
    .hero h1 {
        color: var(--text-white);
        font-weight: 800;
        margin-bottom: 20px;
        letter-spacing: -1px;
    }
    .hero h1 span {
        background: linear-gradient(135deg, var(--secondary), #ff8a8a);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }
    .hero p {
        color: rgba(255,255,255,0.7);
        font-size: 1.15rem;
        max-width: 620px;
        margin: 0 auto 36px;
        line-height: 1.8;
    }
    .hero-actions {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 16px;
        flex-wrap: wrap;
    }
    .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: 2rem;
        font-weight: 800;
        color: var(--text-white);
        line-height: 1.2;
    }
    .hero-stat .num span { color: var(--secondary); }
    .hero-stat .label {
        font-size: 0.8rem;
        color: rgba(255,255,255,0.5);
        margin-top: 4px;
    }

    /* ===== Intro Section ===== */
    .intro-section {
        background: var(--bg-white);
    }
    .intro-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 60px;
        align-items: center;
    }
    .intro-image {
        border-radius: var(--radius-lg);
        overflow: hidden;
        box-shadow: var(--shadow-lg);
        position: relative;
    }
    .intro-image img {
        width: 100%;
        height: 420px;
        object-fit: cover;
        transition: var(--transition);
    }
    .intro-image:hover img { transform: scale(1.02); }
    .intro-text h2 { margin-bottom: 20px; }
    .intro-text p { color: var(--text-weak); font-size: 1.02rem; line-height: 1.8; }
    .intro-features {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 16px;
        margin-top: 28px;
    }
    .intro-feature-item {
        display: flex;
        align-items: center;
        gap: 12px;
        font-size: 0.95rem;
        color: var(--text-body);
    }
    .intro-feature-item i {
        color: var(--secondary);
        font-size: 1rem;
        width: 24px;
        text-align: center;
    }

    /* ===== Category Section ===== */
    .category-section {
        background: var(--bg-section-alt);
    }
    .category-grid {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        gap: 28px;
    }
    .category-card {
        background: var(--bg-card);
        border-radius: var(--radius-md);
        overflow: hidden;
        box-shadow: var(--shadow-sm);
        transition: var(--transition);
        border: 1px solid var(--border-card);
        cursor: pointer;
    }
    .category-card:hover {
        transform: translateY(-6px);
        box-shadow: var(--shadow-hover);
        border-color: rgba(233,69,96,0.15);
    }
    .category-card .card-img {
        height: 200px;
        overflow: hidden;
        position: relative;
    }
    .category-card .card-img img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: var(--transition);
    }
    .category-card:hover .card-img img { transform: scale(1.05); }
    .category-card .card-img .overlay {
        position: absolute;
        bottom: 0;
        left: 0;
        right: 0;
        padding: 16px 20px;
        background: linear-gradient(transparent, rgba(26,26,46,0.7));
    }
    .category-card .card-img .overlay .badge {
        background: var(--secondary);
        color: var(--text-white);
    }
    .category-card .card-body {
        padding: 22px 24px 26px;
    }
    .category-card .card-body h3 {
        font-size: 1.15rem;
        margin-bottom: 8px;
    }
    .category-card .card-body p {
        color: var(--text-weak);
        font-size: 0.9rem;
        margin-bottom: 16px;
        line-height: 1.6;
    }
    .category-card .card-footer {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding-top: 14px;
        border-top: 1px solid var(--border-light);
    }
    .category-card .card-footer .meta {
        font-size: 0.8rem;
        color: var(--text-muted);
        display: flex;
        align-items: center;
        gap: 6px;
    }
    .category-card .card-footer .btn {
        padding: 6px 18px;
        font-size: 0.8rem;
    }

    /* ===== Latest Posts Section ===== */
    .posts-section {
        background: var(--bg-white);
    }
    .posts-grid {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
        gap: 28px;
    }
    .post-card {
        background: var(--bg-card);
        border-radius: var(--radius-md);
        overflow: hidden;
        box-shadow: var(--shadow-sm);
        transition: var(--transition);
        border: 1px solid var(--border-card);
    }
    .post-card:hover {
        transform: translateY(-4px);
        box-shadow: var(--shadow-md);
    }
    .post-card .post-img {
        height: 200px;
        overflow: hidden;
        position: relative;
    }
    .post-card .post-img img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: var(--transition);
    }
    .post-card:hover .post-img img { transform: scale(1.04); }
    .post-card .post-img .post-cat {
        position: absolute;
        top: 14px;
        left: 14px;
        background: var(--secondary);
        color: var(--text-white);
        padding: 4px 14px;
        border-radius: 50px;
        font-size: 0.72rem;
        font-weight: 600;
    }
    .post-card .post-body {
        padding: 22px 24px 26px;
    }
    .post-card .post-body .post-meta {
        display: flex;
        align-items: center;
        gap: 16px;
        font-size: 0.78rem;
        color: var(--text-muted);
        margin-bottom: 10px;
    }
    .post-card .post-body .post-meta i { margin-right: 4px; }
    .post-card .post-body h3 {
        font-size: 1.08rem;
        margin-bottom: 10px;
        line-height: 1.4;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    .post-card .post-body h3 a { color: var(--text-primary); }
    .post-card .post-body h3 a:hover { color: var(--secondary); }
    .post-card .post-body p {
        color: var(--text-weak);
        font-size: 0.88rem;
        line-height: 1.6;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
        margin-bottom: 0;
    }
    .posts-empty {
        text-align: center;
        padding: 60px 20px;
        color: var(--text-weak);
        font-size: 1rem;
        background: var(--bg-section-alt);
        border-radius: var(--radius-md);
        border: 1px dashed var(--border-light);
    }
    .posts-empty i { font-size: 2.4rem; color: var(--text-muted); margin-bottom: 16px; display: block; }

    /* ===== Stats Section ===== */
    .stats-section {
        background: var(--gradient-main);
        position: relative;
        overflow: hidden;
    }
    .stats-section::before {
        content: '';
        position: absolute;
        inset: 0;
        background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
        opacity: 0.08;
    }
    .stats-grid {
        position: relative;
        z-index: 1;
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 32px;
        text-align: center;
    }
    .stat-item .stat-num {
        font-size: 2.8rem;
        font-weight: 800;
        color: var(--text-white);
        line-height: 1.2;
    }
    .stat-item .stat-num span { color: var(--secondary); }
    .stat-item .stat-label {
        font-size: 0.9rem;
        color: rgba(255,255,255,0.6);
        margin-top: 6px;
    }

    /* ===== FAQ Section ===== */
    .faq-section {
        background: var(--bg-white);
    }
    .faq-list {
        max-width: 800px;
        margin: 0 auto;
        display: flex;
        flex-direction: column;
        gap: 12px;
    }
    .faq-item {
        background: var(--bg-section-alt);
        border-radius: var(--radius-md);
        overflow: hidden;
        border: 1px solid var(--border-light);
        transition: var(--transition);
    }
    .faq-item:hover { border-color: rgba(233,69,96,0.15); }
    .faq-question {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 18px 24px;
        font-weight: 600;
        font-size: 1rem;
        color: var(--text-primary);
        cursor: pointer;
        background: transparent;
        border: none;
        width: 100%;
        text-align: left;
        transition: var(--transition);
    }
    .faq-question i {
        color: var(--secondary);
        transition: var(--transition);
        font-size: 0.9rem;
    }
    .faq-item.active .faq-question i { transform: rotate(180deg); }
    .faq-answer {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.4s ease, padding 0.3s ease;
        padding: 0 24px;
        color: var(--text-weak);
        font-size: 0.92rem;
        line-height: 1.7;
    }
    .faq-item.active .faq-answer {
        max-height: 300px;
        padding: 0 24px 20px;
    }

    /* ===== CTA Section ===== */
    .cta-section {
        background: var(--bg-section-alt);
        position: relative;
    }
    .cta-box {
        background: var(--gradient-main);
        border-radius: var(--radius-lg);
        padding: 60px 48px;
        text-align: center;
        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: 0.06;
    }
    .cta-box h2 {
        color: var(--text-white);
        font-size: clamp(1.6rem, 3vw, 2.2rem);
        margin-bottom: 16px;
        position: relative;
        z-index: 1;
    }
    .cta-box p {
        color: rgba(255,255,255,0.65);
        max-width: 540px;
        margin: 0 auto 28px;
        font-size: 1.02rem;
        position: relative;
        z-index: 1;
    }
    .cta-box .btn {
        position: relative;
        z-index: 1;
    }

    /* ===== Footer ===== */
    .site-footer {
        background: var(--primary);
        color: rgba(255,255,255,0.6);
        padding: 60px 0 0;
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr 1fr;
        gap: 40px;
        padding-bottom: 40px;
        border-bottom: 1px solid rgba(255,255,255,0.06);
    }
    .footer-brand .logo { margin-bottom: 16px; font-size: 1.2rem; }
    .footer-brand p {
        font-size: 0.88rem;
        line-height: 1.7;
        color: rgba(255,255,255,0.5);
        max-width: 340px;
    }
    .footer-col h4 {
        color: var(--text-white);
        font-size: 0.95rem;
        font-weight: 700;
        margin-bottom: 18px;
    }
    .footer-col a {
        display: block;
        padding: 5px 0;
        font-size: 0.88rem;
        color: rgba(255,255,255,0.5);
        transition: var(--transition);
    }
    .footer-col a:hover { color: var(--secondary); padding-left: 4px; }
    .footer-bottom {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 20px 0;
        font-size: 0.82rem;
        color: rgba(255,255,255,0.35);
        flex-wrap: wrap;
        gap: 12px;
    }
    .footer-bottom a { color: rgba(255,255,255,0.35); }
    .footer-bottom a:hover { color: var(--secondary); }
    .footer-socials {
        display: flex;
        gap: 14px;
    }
    .footer-socials a {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 36px;
        height: 36px;
        border-radius: 50%;
        background: rgba(255,255,255,0.06);
        color: rgba(255,255,255,0.5);
        font-size: 0.9rem;
        transition: var(--transition);
    }
    .footer-socials a:hover {
        background: var(--secondary);
        color: var(--text-white);
        transform: translateY(-2px);
    }

    /* ===== Responsive ===== */
    @media (max-width: 1024px) {
        :root { --spacing-section: 70px; }
        .intro-grid { gap: 40px; }
        .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }
        .footer-grid { grid-template-columns: 1fr 1fr; }
    }

    @media (max-width: 768px) {
        :root { --spacing-section: 56px; --header-height: 64px; }
        .mobile-toggle { display: block; }
        .nav-menu {
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            background: rgba(26,26,46,0.98);
            backdrop-filter: blur(20px);
            flex-direction: column;
            padding: 20px 24px;
            gap: 6px;
            transform: translateY(-120%);
            opacity: 0;
            transition: var(--transition);
            border-bottom: 1px solid rgba(255,255,255,0.06);
            pointer-events: none;
        }
        .nav-menu.open {
            transform: translateY(0);
            opacity: 1;
            pointer-events: all;
        }
        .nav-menu a { width: 100%; padding: 12px 18px; }
        .header-actions .search-box { display: none; }
        .header-actions .btn-header { padding: 8px 16px; font-size: 0.8rem; }
        .hero { min-height: 80vh; }
        .hero-stats { gap: 24px; }
        .hero-stat .num { font-size: 1.6rem; }
        .intro-grid { grid-template-columns: 1fr; }
        .intro-image img { height: 280px; }
        .intro-features { grid-template-columns: 1fr; }
        .category-grid { grid-template-columns: 1fr; }
        .posts-grid { grid-template-columns: 1fr; }
        .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
        .stat-item .stat-num { font-size: 2rem; }
        .cta-box { padding: 40px 24px; }
        .footer-grid { grid-template-columns: 1fr; gap: 32px; }
        .footer-bottom { flex-direction: column; text-align: center; }
    }

    @media (max-width: 520px) {
        .hero h1 { font-size: 1.8rem; }
        .hero p { font-size: 0.95rem; }
        .hero-actions { flex-direction: column; width: 100%; }
        .hero-actions .btn { width: 100%; }
        .hero-stats { flex-direction: column; gap: 16px; }
        .section-header h2 { font-size: 1.4rem; }
        .post-card .post-img { height: 180px; }
        .category-card .card-img { height: 170px; }
        .stats-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
        .stat-item .stat-num { font-size: 1.6rem; }
        .faq-question { font-size: 0.9rem; padding: 14px 18px; }
        .cta-box h2 { font-size: 1.3rem; }
        .cta-box p { font-size: 0.88rem; }
    }

    /* ===== Accessibility ===== */
    a:focus-visible, button:focus-visible, input:focus-visible {
        outline: 2px solid var(--secondary);
        outline-offset: 2px;
    }

    /* ===== Utility ===== */
    .mt-20 { margin-top: 20px; }
    .mb-20 { margin-bottom: 20px; }
    .gap-12 { gap: 12px; }
    .flex-center { display: flex; align-items: center; justify-content: center; }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #7c3aed;
            --primary-light: #8b5cf6;
            --primary-dark: #6d28d9;
            --primary-bg: rgba(124, 58, 237, 0.08);
            --accent: #f59e0b;
            --accent-light: #fbbf24;
            --accent-dark: #d97706;
            --bg: #0f0f1a;
            --bg-card: #1a1a2e;
            --bg-card-hover: #22223a;
            --bg-elevated: #16162a;
            --text: #f1f5f9;
            --text-secondary: #94a3b8;
            --text-muted: #64748b;
            --border: rgba(124, 58, 237, 0.15);
            --border-light: rgba(124, 58, 237, 0.08);
            --radius: 16px;
            --radius-sm: 10px;
            --radius-xs: 6px;
            --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
            --shadow-lg: 0 12px 48px rgba(0, 0, 0, 0.4);
            --shadow-glow: 0 0 30px rgba(124, 58, 237, 0.15);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --max-width: 1200px;
            --header-h: 72px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

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

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

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

        button,
        input,
        textarea,
        select {
            font: inherit;
            color: inherit;
            border: none;
            outline: none;
            background: none;
        }

        button {
            cursor: pointer;
        }

        ul,
        ol {
            list-style: none;
        }

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

        /* ===== 头部 / 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--header-h);
            background: rgba(15, 15, 26, 0.88);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border);
            z-index: 1000;
            transition: background var(--transition), box-shadow var(--transition);
        }

        .site-header.scrolled {
            background: rgba(15, 15, 26, 0.96);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-h);
            gap: 16px;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text);
            white-space: nowrap;
        }
        .logo i {
            font-size: 1.5rem;
            color: var(--primary-light);
            transition: transform var(--transition);
        }
        .logo:hover i {
            transform: rotate(8deg) scale(1.05);
        }
        .logo:hover {
            color: var(--text);
        }
        .logo span {
            background: linear-gradient(135deg, var(--primary-light), var(--accent-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-menu a {
            padding: 8px 18px;
            border-radius: 100px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition);
            position: relative;
            white-space: nowrap;
        }
        .nav-menu a:hover {
            color: var(--text);
            background: var(--primary-bg);
        }
        .nav-menu a.active {
            color: #fff;
            background: var(--primary);
            box-shadow: 0 4px 16px rgba(124, 58, 237, 0.3);
        }
        .nav-menu a.active:hover {
            background: var(--primary-dark);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .header-actions .search-box {
            display: flex;
            align-items: center;
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 100px;
            padding: 0 14px;
            transition: all var(--transition);
        }
        .header-actions .search-box:focus-within {
            border-color: var(--primary-light);
            box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.15);
        }
        .header-actions .search-box input {
            padding: 8px 10px;
            font-size: 0.85rem;
            background: transparent;
            color: var(--text);
            width: 140px;
        }
        .header-actions .search-box input::placeholder {
            color: var(--text-muted);
        }
        .header-actions .search-box i {
            color: var(--text-muted);
            font-size: 0.85rem;
        }
        .header-actions .btn-cta {
            padding: 8px 22px;
            border-radius: 100px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            font-weight: 600;
            font-size: 0.85rem;
            transition: all var(--transition);
            box-shadow: 0 4px 16px rgba(124, 58, 237, 0.25);
            white-space: nowrap;
        }
        .header-actions .btn-cta:hover {
            transform: translateY(-2px) scale(1.02);
            box-shadow: 0 8px 28px rgba(124, 58, 237, 0.35);
        }
        .header-actions .btn-cta:active {
            transform: scale(0.96);
        }

        .menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text);
            padding: 4px 8px;
            border-radius: var(--radius-xs);
            transition: background var(--transition);
        }
        .menu-toggle:hover {
            background: var(--primary-bg);
        }

        /* ===== 移动端导航 ===== */
        .mobile-nav {
            display: none;
            position: fixed;
            top: var(--header-h);
            left: 0;
            width: 100%;
            background: rgba(15, 15, 26, 0.98);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border);
            padding: 16px 24px 24px;
            z-index: 999;
            flex-direction: column;
            gap: 8px;
            box-shadow: var(--shadow-lg);
            transform: translateY(-12px);
            opacity: 0;
            pointer-events: none;
            transition: all 0.3s ease;
        }
        .mobile-nav.open {
            transform: translateY(0);
            opacity: 1;
            pointer-events: auto;
        }
        .mobile-nav a {
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            font-size: 1rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition);
        }
        .mobile-nav a:hover {
            background: var(--primary-bg);
            color: var(--text);
        }
        .mobile-nav a.active {
            color: #fff;
            background: var(--primary);
        }
        .mobile-nav .btn-cta {
            display: block;
            text-align: center;
            margin-top: 8px;
            padding: 14px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            font-weight: 600;
        }

        /* ===== 页面横幅 ===== */
        .page-banner {
            margin-top: var(--header-h);
            padding: 80px 0 60px;
            background: linear-gradient(135deg, rgba(124, 58, 237, 0.12), rgba(15, 15, 26, 0.95)),
                url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            border-bottom: 1px solid var(--border);
            position: relative;
        }
        .page-banner::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 80px;
            background: linear-gradient(to top, var(--bg), transparent);
        }
        .page-banner .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .page-banner h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 16px;
            background: linear-gradient(135deg, #fff, var(--primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .page-banner p {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 640px;
            margin: 0 auto 20px;
        }
        .page-banner .breadcrumb {
            display: flex;
            justify-content: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-muted);
            flex-wrap: wrap;
        }
        .page-banner .breadcrumb a {
            color: var(--text-secondary);
        }
        .page-banner .breadcrumb a:hover {
            color: var(--primary-light);
        }
        .page-banner .breadcrumb span {
            color: var(--text-muted);
        }
        .page-banner .breadcrumb .current {
            color: var(--accent-light);
        }

        /* ===== 分类筛选 ===== */
        .filter-bar {
            padding: 28px 0 12px;
            position: sticky;
            top: var(--header-h);
            background: var(--bg);
            z-index: 50;
            border-bottom: 1px solid var(--border-light);
        }
        .filter-bar .container {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
        }
        .filter-tag {
            padding: 6px 18px;
            border-radius: 100px;
            font-size: 0.82rem;
            font-weight: 500;
            color: var(--text-secondary);
            background: var(--bg-card);
            border: 1px solid var(--border);
            transition: all var(--transition);
            cursor: pointer;
            user-select: none;
        }
        .filter-tag:hover {
            border-color: var(--primary-light);
            color: var(--text);
        }
        .filter-tag.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            box-shadow: 0 4px 14px rgba(124, 58, 237, 0.2);
        }
        .filter-tag i {
            margin-right: 6px;
            font-size: 0.75rem;
        }

        /* ===== 攻略网格 ===== */
        .section-guides {
            padding: 48px 0 80px;
        }
        .section-header {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            margin-bottom: 32px;
            flex-wrap: wrap;
            gap: 12px;
        }
        .section-header h2 {
            font-size: 1.8rem;
            font-weight: 700;
            line-height: 1.2;
        }
        .section-header h2 i {
            color: var(--accent);
            margin-right: 10px;
        }
        .section-header .sub {
            color: var(--text-secondary);
            font-size: 0.95rem;
        }
        .section-header .view-all {
            font-size: 0.9rem;
            color: var(--primary-light);
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 6px;
            transition: all var(--transition);
        }
        .section-header .view-all:hover {
            color: var(--accent-light);
            gap: 10px;
        }

        .guide-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .guide-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .guide-card:hover {
            transform: translateY(-6px);
            border-color: rgba(124, 58, 237, 0.3);
            box-shadow: var(--shadow-glow), var(--shadow);
            background: var(--bg-card-hover);
        }
        .guide-card .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: 0;
            transition: transform var(--transition);
        }
        .guide-card:hover .card-img {
            transform: scale(1.02);
        }
        .guide-card .card-body {
            padding: 20px 22px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .guide-card .card-tags {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
            margin-bottom: 12px;
        }
        .guide-card .card-tags .badge {
            padding: 3px 12px;
            border-radius: 100px;
            font-size: 0.75rem;
            font-weight: 600;
            background: var(--primary-bg);
            color: var(--primary-light);
            border: 1px solid rgba(124, 58, 237, 0.15);
        }
        .guide-card .card-tags .badge.hot {
            background: rgba(245, 158, 11, 0.12);
            color: var(--accent-light);
            border-color: rgba(245, 158, 11, 0.2);
        }
        .guide-card .card-tags .badge.new {
            background: rgba(16, 185, 129, 0.12);
            color: #34d399;
            border-color: rgba(16, 185, 129, 0.2);
        }
        .guide-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .guide-card h3 a {
            color: var(--text);
        }
        .guide-card h3 a:hover {
            color: var(--primary-light);
        }
        .guide-card .card-excerpt {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.7;
            flex: 1;
            margin-bottom: 16px;
        }
        .guide-card .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.82rem;
            color: var(--text-muted);
            border-top: 1px solid var(--border-light);
            padding-top: 14px;
            margin-top: auto;
        }
        .guide-card .card-meta .meta-left {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .guide-card .card-meta i {
            margin-right: 4px;
            font-size: 0.75rem;
        }
        .guide-card .card-meta .read-more {
            color: var(--primary-light);
            font-weight: 600;
            font-size: 0.85rem;
            display: flex;
            align-items: center;
            gap: 4px;
            transition: all var(--transition);
        }
        .guide-card .card-meta .read-more:hover {
            color: var(--accent-light);
            gap: 8px;
        }

        /* ===== 特色攻略区块 ===== */
        .section-featured {
            padding: 60px 0;
            background: var(--bg-elevated);
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
        }
        .featured-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
            align-items: center;
        }
        .featured-image {
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }
        .featured-image img {
            width: 100%;
            height: 360px;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .featured-image:hover img {
            transform: scale(1.03);
        }
        .featured-content h2 {
            font-size: 1.9rem;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 18px;
        }
        .featured-content h2 span {
            color: var(--accent-light);
        }
        .featured-content p {
            color: var(--text-secondary);
            font-size: 1rem;
            line-height: 1.8;
            margin-bottom: 20px;
        }
        .featured-content .feature-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            margin-bottom: 24px;
        }
        .featured-content .feature-list li {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.95rem;
            color: var(--text-secondary);
        }
        .featured-content .feature-list li i {
            color: var(--accent);
            font-size: 1rem;
            width: 20px;
            text-align: center;
        }
        .featured-content .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: 100px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition);
            box-shadow: 0 4px 20px rgba(124, 58, 237, 0.25);
        }
        .featured-content .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 32px rgba(124, 58, 237, 0.35);
            color: #fff;
        }
        .featured-content .btn-primary:active {
            transform: scale(0.97);
        }

        /* ===== 攻略步骤 / 流程 ===== */
        .section-steps {
            padding: 60px 0 72px;
        }
        .steps-header {
            text-align: center;
            margin-bottom: 44px;
        }
        .steps-header h2 {
            font-size: 1.9rem;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .steps-header p {
            color: var(--text-secondary);
            max-width: 520px;
            margin: 0 auto;
        }
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .step-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 28px 22px 32px;
            text-align: center;
            transition: all var(--transition);
            position: relative;
        }
        .step-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-glow);
            border-color: rgba(124, 58, 237, 0.2);
        }
        .step-card .step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            font-size: 1.3rem;
            font-weight: 800;
            margin-bottom: 18px;
            box-shadow: 0 4px 16px rgba(124, 58, 237, 0.25);
        }
        .step-card h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .step-card p {
            color: var(--text-secondary);
            font-size: 0.88rem;
            line-height: 1.7;
        }

        /* ===== FAQ ===== */
        .section-faq {
            padding: 60px 0 72px;
            background: var(--bg-elevated);
            border-top: 1px solid var(--border-light);
        }
        .faq-header {
            text-align: center;
            margin-bottom: 40px;
        }
        .faq-header h2 {
            font-size: 1.9rem;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .faq-header p {
            color: var(--text-secondary);
            max-width: 500px;
            margin: 0 auto;
        }
        .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);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(124, 58, 237, 0.2);
        }
        .faq-item .faq-q {
            padding: 18px 22px;
            font-weight: 600;
            font-size: 1rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            user-select: none;
            transition: background var(--transition);
            gap: 12px;
        }
        .faq-item .faq-q:hover {
            background: var(--primary-bg);
        }
        .faq-item .faq-q i {
            color: var(--primary-light);
            transition: transform var(--transition);
            font-size: 0.9rem;
            flex-shrink: 0;
        }
        .faq-item.open .faq-q i {
            transform: rotate(180deg);
        }
        .faq-item .faq-a {
            padding: 0 22px 0;
            max-height: 0;
            overflow: hidden;
            transition: all 0.35s ease;
            color: var(--text-secondary);
            font-size: 0.92rem;
            line-height: 1.8;
        }
        .faq-item.open .faq-a {
            padding: 0 22px 20px;
            max-height: 300px;
        }

        /* ===== CTA 区块 ===== */
        .section-cta {
            padding: 72px 0;
            background: linear-gradient(135deg, rgba(124, 58, 237, 0.08), rgba(15, 15, 26, 0.98)),
                url('/assets/images/backpic/back-3.png') center/cover no-repeat;
            text-align: center;
            position: relative;
        }
        .section-cta::after {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(15, 15, 26, 0.6);
            z-index: 0;
        }
        .section-cta .container {
            position: relative;
            z-index: 1;
        }
        .section-cta h2 {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 14px;
        }
        .section-cta p {
            color: var(--text-secondary);
            font-size: 1.05rem;
            max-width: 560px;
            margin: 0 auto 28px;
        }
        .section-cta .btn-group {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .section-cta .btn-primary {
            padding: 16px 36px;
            border-radius: 100px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            font-weight: 700;
            font-size: 1rem;
            transition: all var(--transition);
            box-shadow: 0 4px 24px rgba(124, 58, 237, 0.3);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .section-cta .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 36px rgba(124, 58, 237, 0.4);
            color: #fff;
        }
        .section-cta .btn-secondary {
            padding: 16px 36px;
            border-radius: 100px;
            background: transparent;
            color: var(--text);
            font-weight: 600;
            font-size: 1rem;
            border: 1px solid var(--border);
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .section-cta .btn-secondary:hover {
            border-color: var(--primary-light);
            color: var(--primary-light);
            background: var(--primary-bg);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-elevated);
            border-top: 1px solid var(--border);
            padding: 52px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 36px;
            padding-bottom: 32px;
            border-bottom: 1px solid var(--border-light);
        }
        .footer-brand .logo {
            font-size: 1.15rem;
            margin-bottom: 14px;
            display: inline-flex;
        }
        .footer-brand p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.8;
            max-width: 280px;
        }
        .footer-col h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text);
        }
        .footer-col a {
            display: block;
            padding: 5px 0;
            font-size: 0.9rem;
            color: var(--text-secondary);
            transition: all var(--transition);
        }
        .footer-col a:hover {
            color: var(--primary-light);
            padding-left: 4px;
        }
        .footer-col a i {
            width: 20px;
            text-align: center;
            margin-right: 6px;
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 0 24px;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .footer-bottom span {
            color: var(--text-muted);
        }
        .footer-socials {
            display: flex;
            gap: 12px;
        }
        .footer-socials a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: var(--bg-card);
            color: var(--text-secondary);
            font-size: 1rem;
            transition: all var(--transition);
            border: 1px solid var(--border);
        }
        .footer-socials a:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            transform: translateY(-2px);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .guide-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .featured-grid {
                grid-template-columns: 1fr;
            }
            .featured-image img {
                height: 260px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-h: 64px;
            }
            .header-inner {
                padding: 0 16px;
            }
            .nav-menu {
                display: none;
            }
            .header-actions .search-box {
                display: none;
            }
            .header-actions .btn-cta {
                display: none;
            }
            .menu-toggle {
                display: block;
            }
            .mobile-nav {
                display: flex;
            }

            .page-banner {
                padding: 60px 0 44px;
            }
            .page-banner h1 {
                font-size: 1.8rem;
            }
            .page-banner p {
                font-size: 0.95rem;
            }

            .guide-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .section-header h2 {
                font-size: 1.4rem;
            }
            .steps-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .step-card {
                padding: 22px 16px 24px;
            }
            .step-card .step-num {
                width: 44px;
                height: 44px;
                font-size: 1.1rem;
            }

            .section-featured {
                padding: 40px 0;
            }
            .featured-content h2 {
                font-size: 1.4rem;
            }

            .section-cta h2 {
                font-size: 1.6rem;
            }
            .section-cta .btn-primary,
            .section-cta .btn-secondary {
                padding: 14px 24px;
                font-size: 0.9rem;
                width: 100%;
                justify-content: center;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }

            .filter-bar .container {
                gap: 8px;
            }
            .filter-tag {
                font-size: 0.78rem;
                padding: 5px 14px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 14px;
            }
            .page-banner h1 {
                font-size: 1.5rem;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .guide-card .card-img {
                height: 170px;
            }
            .section-header {
                flex-direction: column;
                align-items: flex-start;
            }
            .section-cta {
                padding: 48px 0;
            }
            .section-cta h2 {
                font-size: 1.3rem;
            }
        }

        /* ===== 滚动渐变导航 ===== */
        .site-header.scrolled {
            background: rgba(15, 15, 26, 0.96);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
        }

        /* ===== 常用过渡 ===== */
        .fade-in {
            animation: fadeIn 0.6s ease forwards;
        }
        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* ===== 占位无内容提示 ===== */
        .empty-state {
            text-align: center;
            padding: 60px 20px;
            color: var(--text-muted);
        }
        .empty-state i {
            font-size: 3rem;
            margin-bottom: 16px;
            display: block;
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
    :root {
        --primary: #6c5ce7;
        --primary-dark: #5a4bd1;
        --primary-light: #a29bfe;
        --secondary: #fd79a8;
        --accent: #fdcb6e;
        --bg-body: #0f0e17;
        --bg-card: #1a1a2e;
        --bg-card-hover: #222242;
        --bg-section: #12101e;
        --bg-dark: #0a0915;
        --text-primary: #f0f0f5;
        --text-secondary: #b0b0c8;
        --text-muted: #6c6c8a;
        --border-color: #2a2a4a;
        --border-light: #3a3a5a;
        --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
        --shadow-md: 0 8px 30px rgba(0,0,0,0.4);
        --shadow-lg: 0 20px 60px rgba(0,0,0,0.5);
        --radius-sm: 8px;
        --radius-md: 16px;
        --radius-lg: 24px;
        --radius-xl: 32px;
        --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        --font-sans: 'Segoe UI', system-ui, -apple-system, sans-serif;
        --container-w: 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-body);
        color: var(--text-primary);
        line-height: 1.7;
        font-size: 16px;
        min-height: 100vh;
        display: flex;
        flex-direction: column;
    }
    img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
    a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
    a:hover { color: var(--primary); }
    button, input, textarea { font-family: inherit; font-size: inherit; outline: none; border: none; }
    ul, ol { list-style: none; }
    h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.3; color: var(--text-primary); }

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

    /* ===== 头部导航 ===== */
    .site-header {
        position: sticky;
        top: 0;
        z-index: 1000;
        background: rgba(15, 14, 23, 0.92);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        border-bottom: 1px solid var(--border-color);
        height: var(--header-h);
        display: flex;
        align-items: center;
    }
    .site-header .container {
        display: flex;
        align-items: center;
        justify-content: space-between;
    }
    .site-header .logo {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 22px;
        font-weight: 800;
        color: var(--text-primary);
        letter-spacing: 0.5px;
        transition: var(--transition);
    }
    .site-header .logo i {
        color: var(--primary-light);
        font-size: 26px;
    }
    .site-header .logo:hover { color: var(--primary-light); transform: scale(1.02); }
    .nav-menu {
        display: flex;
        align-items: center;
        gap: 6px;
    }
    .nav-menu a {
        padding: 8px 18px;
        border-radius: var(--radius-sm);
        color: var(--text-secondary);
        font-weight: 500;
        font-size: 15px;
        transition: var(--transition);
        position: relative;
    }
    .nav-menu a:hover { color: var(--text-primary); background: rgba(108, 92, 231, 0.12); }
    .nav-menu a.active {
        color: #fff;
        background: var(--primary);
        box-shadow: 0 4px 16px rgba(108, 92, 231, 0.35);
    }
    .nav-menu a.active:hover { background: var(--primary-dark); }
    .nav-right {
        display: flex;
        align-items: center;
        gap: 12px;
    }
    .nav-search {
        display: flex;
        align-items: center;
        background: var(--bg-card);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-sm);
        padding: 0 14px;
        transition: var(--transition);
    }
    .nav-search:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.2); }
    .nav-search input {
        background: transparent;
        border: none;
        padding: 8px 10px;
        color: var(--text-primary);
        width: 160px;
        font-size: 14px;
    }
    .nav-search input::placeholder { color: var(--text-muted); }
    .nav-search i { color: var(--text-muted); font-size: 14px; }
    .nav-cta {
        background: linear-gradient(135deg, var(--primary), var(--secondary));
        color: #fff;
        padding: 8px 22px;
        border-radius: var(--radius-sm);
        font-weight: 600;
        font-size: 14px;
        transition: var(--transition);
        box-shadow: 0 4px 16px rgba(108, 92, 231, 0.3);
    }
    .nav-cta:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(108, 92, 231, 0.4); color: #fff; }
    .nav-toggle {
        display: none;
        background: transparent;
        color: var(--text-primary);
        font-size: 26px;
        cursor: pointer;
        padding: 4px 8px;
        border-radius: var(--radius-sm);
        transition: var(--transition);
    }
    .nav-toggle:hover { background: rgba(108, 92, 231, 0.1); }

    /* ===== 文章 Banner ===== */
    .article-banner {
        background: linear-gradient(135deg, rgba(15,14,23,0.92), rgba(26,26,46,0.85)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
        padding: 80px 0 60px;
        border-bottom: 1px solid var(--border-color);
        position: relative;
    }
    .article-banner::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 0;
        right: 0;
        height: 80px;
        background: linear-gradient(to top, var(--bg-body), transparent);
        pointer-events: none;
    }
    .article-banner .container { position: relative; z-index: 2; }
    .article-breadcrumb {
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: 14px;
        color: var(--text-muted);
        margin-bottom: 24px;
        flex-wrap: wrap;
    }
    .article-breadcrumb a { color: var(--text-muted); }
    .article-breadcrumb a:hover { color: var(--primary-light); }
    .article-breadcrumb i { font-size: 12px; color: var(--text-muted); }
    .article-banner .category-badge {
        display: inline-block;
        background: var(--primary);
        color: #fff;
        padding: 4px 14px;
        border-radius: 20px;
        font-size: 13px;
        font-weight: 600;
        margin-bottom: 16px;
        letter-spacing: 0.3px;
    }
    .article-banner h1 {
        font-size: 36px;
        font-weight: 800;
        color: #fff;
        max-width: 800px;
        line-height: 1.25;
        margin-bottom: 20px;
        text-shadow: 0 2px 12px rgba(0,0,0,0.3);
    }
    .article-meta {
        display: flex;
        align-items: center;
        gap: 24px;
        flex-wrap: wrap;
        color: var(--text-secondary);
        font-size: 14px;
    }
    .article-meta i { margin-right: 6px; color: var(--primary-light); }
    .article-meta span { display: flex; align-items: center; }

    /* ===== 文章正文 ===== */
    .article-main {
        padding: 60px 0 80px;
        flex: 1;
    }
    .article-layout {
        display: grid;
        grid-template-columns: 1fr 320px;
        gap: 48px;
        align-items: start;
    }
    .article-content {
        background: var(--bg-card);
        border-radius: var(--radius-md);
        padding: 40px 44px;
        border: 1px solid var(--border-color);
        box-shadow: var(--shadow-sm);
    }
    .article-content h2 {
        font-size: 26px;
        margin: 40px 0 16px;
        color: var(--text-primary);
        border-left: 4px solid var(--primary);
        padding-left: 16px;
    }
    .article-content h3 {
        font-size: 20px;
        margin: 32px 0 12px;
        color: var(--text-primary);
    }
    .article-content p {
        margin-bottom: 18px;
        color: var(--text-secondary);
        font-size: 16px;
        line-height: 1.85;
    }
    .article-content ul, .article-content ol {
        margin: 16px 0 20px;
        padding-left: 24px;
        color: var(--text-secondary);
    }
    .article-content li {
        margin-bottom: 8px;
        list-style: disc;
        line-height: 1.7;
    }
    .article-content ol li { list-style: decimal; }
    .article-content blockquote {
        border-left: 4px solid var(--primary);
        background: rgba(108, 92, 231, 0.06);
        padding: 16px 24px;
        margin: 24px 0;
        border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
        color: var(--text-secondary);
        font-style: italic;
    }
    .article-content img {
        border-radius: var(--radius-sm);
        margin: 28px 0;
        box-shadow: var(--shadow-sm);
        width: 100%;
    }
    .article-content a { color: var(--primary-light); text-decoration: underline; text-underline-offset: 3px; }
    .article-content a:hover { color: var(--secondary); }
    .article-content .content-highlight {
        background: linear-gradient(135deg, rgba(108,92,231,0.08), rgba(253,121,168,0.08));
        border: 1px solid var(--border-light);
        border-radius: var(--radius-sm);
        padding: 20px 24px;
        margin: 24px 0;
    }
    .article-footer-meta {
        margin-top: 40px;
        padding-top: 24px;
        border-top: 1px solid var(--border-color);
        display: flex;
        justify-content: space-between;
        align-items: center;
        flex-wrap: wrap;
        gap: 16px;
    }
    .article-tags {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
    }
    .article-tags .tag {
        background: var(--bg-section);
        border: 1px solid var(--border-color);
        padding: 4px 14px;
        border-radius: 20px;
        font-size: 13px;
        color: var(--text-secondary);
        transition: var(--transition);
    }
    .article-tags .tag:hover { border-color: var(--primary); color: var(--primary-light); }
    .article-share {
        display: flex;
        align-items: center;
        gap: 12px;
    }
    .article-share span { font-size: 14px; color: var(--text-muted); }
    .article-share a {
        width: 36px;
        height: 36px;
        display: flex;
        align-items: center;
        justify-content: center;
        border-radius: 50%;
        background: var(--bg-section);
        border: 1px solid var(--border-color);
        color: var(--text-secondary);
        transition: var(--transition);
    }
    .article-share a:hover { background: var(--primary); color: #fff; border-color: var(--primary); }

    /* ===== 侧边栏 ===== */
    .article-sidebar {
        display: flex;
        flex-direction: column;
        gap: 32px;
    }
    .sidebar-card {
        background: var(--bg-card);
        border-radius: var(--radius-md);
        padding: 28px;
        border: 1px solid var(--border-color);
        box-shadow: var(--shadow-sm);
    }
    .sidebar-card h3 {
        font-size: 18px;
        margin-bottom: 18px;
        padding-bottom: 12px;
        border-bottom: 1px solid var(--border-color);
        display: flex;
        align-items: center;
        gap: 10px;
    }
    .sidebar-card h3 i { color: var(--primary-light); }
    .sidebar-list li {
        padding: 10px 0;
        border-bottom: 1px solid rgba(42,42,74,0.4);
    }
    .sidebar-list li:last-child { border-bottom: none; }
    .sidebar-list a {
        display: flex;
        align-items: flex-start;
        gap: 12px;
        color: var(--text-secondary);
        font-size: 14px;
        line-height: 1.5;
    }
    .sidebar-list a:hover { color: var(--primary-light); }
    .sidebar-list a i { margin-top: 3px; color: var(--primary); font-size: 12px; }
    .sidebar-cta {
        background: linear-gradient(135deg, var(--primary), var(--secondary));
        border-radius: var(--radius-md);
        padding: 32px 28px;
        text-align: center;
        color: #fff;
        border: none;
    }
    .sidebar-cta h3 { color: #fff; border-bottom-color: rgba(255,255,255,0.2); }
    .sidebar-cta h3 i { color: #fff; }
    .sidebar-cta p { font-size: 14px; opacity: 0.9; margin-bottom: 20px; }
    .sidebar-cta .btn-cta {
        background: #fff;
        color: var(--primary);
        padding: 10px 28px;
        border-radius: var(--radius-sm);
        font-weight: 700;
        font-size: 15px;
        transition: var(--transition);
        display: inline-block;
    }
    .sidebar-cta .btn-cta:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.25); color: var(--primary-dark); }

    /* ===== 相关文章 ===== */
    .related-section {
        padding: 60px 0 80px;
        background: var(--bg-section);
    }
    .related-section h2 {
        font-size: 28px;
        margin-bottom: 36px;
        text-align: center;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 12px;
    }
    .related-section h2 i { color: var(--primary-light); }
    .related-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 24px;
    }
    .related-card {
        background: var(--bg-card);
        border-radius: var(--radius-md);
        overflow: hidden;
        border: 1px solid var(--border-color);
        transition: var(--transition);
        box-shadow: var(--shadow-sm);
    }
    .related-card:hover { transform: translateY(-6px); border-color: var(--primary); box-shadow: var(--shadow-md); }
    .related-card img { width: 100%; height: 180px; object-fit: cover; border-radius: 0; }
    .related-card .card-body { padding: 20px 22px; }
    .related-card .card-body h3 { font-size: 17px; margin-bottom: 8px; }
    .related-card .card-body h3 a { color: var(--text-primary); }
    .related-card .card-body h3 a:hover { color: var(--primary-light); }
    .related-card .card-body p { font-size: 14px; color: var(--text-muted); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
    .related-card .card-meta { display: flex; justify-content: space-between; align-items: center; margin-top: 12px; font-size: 13px; color: var(--text-muted); }
    .related-card .card-meta .cat { color: var(--primary-light); font-weight: 600; }

    /* ===== 页脚 ===== */
    .site-footer {
        background: var(--bg-dark);
        border-top: 1px solid var(--border-color);
        padding: 60px 0 0;
        margin-top: auto;
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr 1.5fr;
        gap: 40px;
        padding-bottom: 40px;
        border-bottom: 1px solid var(--border-color);
    }
    .footer-brand .logo {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 20px;
        font-weight: 800;
        color: var(--text-primary);
        margin-bottom: 14px;
    }
    .footer-brand .logo i { color: var(--primary-light); }
    .footer-brand p { color: var(--text-muted); font-size: 14px; line-height: 1.7; max-width: 340px; }
    .footer-col h4 { font-size: 16px; margin-bottom: 18px; color: var(--text-primary); }
    .footer-col a {
        display: block;
        padding: 6px 0;
        color: var(--text-secondary);
        font-size: 14px;
        transition: var(--transition);
    }
    .footer-col a:hover { color: var(--primary-light); padding-left: 4px; }
    .footer-col a i { width: 20px; color: var(--primary-light); }
    .footer-bottom {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 24px 0;
        flex-wrap: wrap;
        gap: 12px;
        font-size: 13px;
        color: var(--text-muted);
    }
    .footer-socials { display: flex; gap: 12px; }
    .footer-socials a {
        width: 36px;
        height: 36px;
        display: flex;
        align-items: center;
        justify-content: center;
        border-radius: 50%;
        background: var(--bg-card);
        border: 1px solid var(--border-color);
        color: var(--text-secondary);
        transition: var(--transition);
    }
    .footer-socials a:hover { background: var(--primary); color: #fff; border-color: var(--primary); transform: translateY(-2px); }

    /* ===== 未找到文章 ===== */
    .not-found-box {
        text-align: center;
        padding: 80px 20px;
        background: var(--bg-card);
        border-radius: var(--radius-md);
        border: 1px solid var(--border-color);
    }
    .not-found-box i { font-size: 64px; color: var(--text-muted); margin-bottom: 24px; }
    .not-found-box h2 { font-size: 28px; margin-bottom: 12px; }
    .not-found-box p { color: var(--text-secondary); margin-bottom: 24px; }
    .not-found-box .btn-back {
        display: inline-block;
        background: var(--primary);
        color: #fff;
        padding: 12px 32px;
        border-radius: var(--radius-sm);
        font-weight: 600;
        transition: var(--transition);
    }
    .not-found-box .btn-back:hover { background: var(--primary-dark); transform: translateY(-2px); }

    /* ===== 响应式 ===== */
    @media (max-width: 1024px) {
        .article-layout { grid-template-columns: 1fr; }
        .related-grid { grid-template-columns: repeat(2, 1fr); }
        .footer-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 768px) {
        :root { --header-h: 64px; }
        .nav-menu {
            position: fixed;
            top: var(--header-h);
            left: 0;
            right: 0;
            background: rgba(15,14,23,0.98);
            backdrop-filter: blur(16px);
            flex-direction: column;
            padding: 16px 24px;
            border-bottom: 1px solid var(--border-color);
            transform: translateY(-120%);
            opacity: 0;
            transition: var(--transition);
            pointer-events: none;
            z-index: 999;
        }
        .nav-menu.open { transform: translateY(0); opacity: 1; pointer-events: all; }
        .nav-menu a { width: 100%; text-align: center; padding: 12px; }
        .nav-toggle { display: block; }
        .nav-search { display: none; }
        .nav-cta { padding: 6px 16px; font-size: 13px; }
        .site-header .logo { font-size: 18px; }
        .site-header .logo i { font-size: 20px; }
        .article-banner { padding: 48px 0 40px; }
        .article-banner h1 { font-size: 26px; }
        .article-content { padding: 24px 20px; }
        .article-content h2 { font-size: 22px; }
        .related-grid { grid-template-columns: 1fr; }
        .footer-grid { grid-template-columns: 1fr; gap: 30px; }
        .footer-bottom { flex-direction: column; text-align: center; }
    }
    @media (max-width: 520px) {
        .container { padding: 0 16px; }
        .article-banner h1 { font-size: 22px; }
        .article-meta { gap: 12px; font-size: 13px; }
        .article-content { padding: 18px 14px; }
        .article-content h2 { font-size: 20px; padding-left: 12px; }
        .article-footer-meta { flex-direction: column; align-items: flex-start; }
        .sidebar-card { padding: 20px; }
        .related-card .card-body { padding: 16px; }
    }