/* roulang page: index */
:root {
        --ink: #161817;
        --ink-soft: #1E241F;
        --brand: #C4833A;
        --brand-hover: #9F5F24;
        --brand-light: rgba(196, 131, 58, 0.12);
        --gold-soft: #D69A57;
        --paper: #F5F2EB;
        --white: #FFFFFF;
        --text-main: #23231F;
        --text-sub: #6A675E;
        --text-light: #9A968C;
        --border: #DED9CE;
        --border-dark: rgba(255, 255, 255, 0.12);
        --shadow-sm: 0 2px 10px rgba(20, 20, 20, 0.04);
        --shadow-lg: 0 18px 40px -18px rgba(15, 20, 20, 0.18);
        --radius-card: 8px;
        --radius-img: 4px;
        --radius-btn: 999px;
        --space-section: 100px;
        --transition: all 0.2s ease-out;
        --font-serif: "Songti SC", "SimSun", "Noto Serif SC", "Source Han Serif SC", Georgia, serif;
        --font-sans: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
    }

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

    html {
        scroll-behavior: smooth;
    }

    body {
        margin: 0;
        font-family: var(--font-sans);
        font-size: 16px;
        line-height: 1.8;
        color: var(--text-main);
        background: var(--white);
        -webkit-font-smoothing: antialiased;
    }

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

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

    a:hover {
        color: var(--brand-hover);
    }

    p {
        margin: 0 0 1rem;
    }

    .container-main {
        width: 100%;
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 24px;
    }

    /* 头部导航 */
    .site-header {
        position: sticky;
        top: 0;
        z-index: 1000;
        height: 68px;
        background: rgba(255, 255, 255, 0.92);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        border-bottom: 1px solid rgba(222, 217, 206, 0.6);
        transition: var(--transition);
    }

    .site-header.scrolled {
        background: #ffffff;
        box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
    }

    .header-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 24px;
        height: 68px;
        gap: 20px;
    }

    .brand-logo {
        display: flex;
        align-items: center;
        gap: 10px;
        flex-shrink: 0;
    }

    .brand-icon {
        width: 32px;
        height: 32px;
        background: var(--ink);
        border-radius: 6px;
        display: flex;
        align-items: center;
        justify-content: center;
        color: var(--brand);
        font-size: 15px;
        font-weight: 700;
    }

    .brand-name {
        font-family: var(--font-serif);
        font-size: 18px;
        font-weight: 800;
        color: var(--ink);
        letter-spacing: 0.02em;
        white-space: nowrap;
    }

    .header-nav {
        display: flex;
        align-items: center;
        gap: 24px;
        flex: 1;
        justify-content: center;
    }

    .header-nav a {
        font-size: 15px;
        color: var(--text-main);
        font-weight: 500;
        padding: 4px 2px;
        position: relative;
        white-space: nowrap;
    }

    .header-nav a::after {
        content: '';
        position: absolute;
        bottom: -2px;
        left: 0;
        width: 0;
        height: 2px;
        background: var(--brand);
        transition: var(--transition);
    }

    .header-nav a:hover {
        color: var(--brand);
    }

    .header-nav a:hover::after {
        width: 100%;
    }

    .header-nav a.is-active {
        color: var(--brand);
        font-weight: 600;
    }

    .header-nav a.is-active::after {
        width: 100%;
    }

    .header-tools {
        display: flex;
        align-items: center;
        gap: 14px;
        flex-shrink: 0;
    }

    .header-search {
        display: flex;
        align-items: center;
        background: var(--paper);
        border-radius: var(--radius-btn);
        padding: 8px 16px;
        width: 190px;
        border: 1px solid transparent;
        transition: var(--transition);
    }

    .header-search:focus-within {
        border-color: var(--brand);
        box-shadow: 0 0 0 2px var(--brand-light);
    }

    .header-search i {
        color: var(--text-light);
        font-size: 14px;
        margin-right: 8px;
    }

    .header-search input {
        border: none;
        background: transparent;
        outline: none;
        font-size: 14px;
        width: 100%;
        color: var(--text-main);
        font-family: var(--font-sans);
    }

    .header-search input::placeholder {
        color: var(--text-light);
    }

    .header-login {
        font-size: 14px;
        color: var(--text-main);
        white-space: nowrap;
    }

    .header-login:hover {
        color: var(--brand);
    }

    .header-cta {
        background: var(--brand);
        color: #fff;
        border: none;
        border-radius: var(--radius-btn);
        padding: 9px 20px;
        font-weight: 600;
        font-size: 14px;
        cursor: pointer;
        white-space: nowrap;
        display: flex;
        align-items: center;
        gap: 6px;
        transition: var(--transition);
    }

    .header-cta:hover {
        background: var(--brand-hover);
        transform: translateY(-1px);
        box-shadow: var(--shadow-sm);
    }

    .header-cta:active {
        transform: translateY(0);
    }

    .burger-btn {
        display: none;
        width: 40px;
        height: 40px;
        background: transparent;
        border: 1px solid var(--border);
        border-radius: 8px;
        cursor: pointer;
        align-items: center;
        justify-content: center;
        font-size: 18px;
        color: var(--text-main);
        transition: var(--transition);
    }

    .burger-btn:hover {
        background: var(--paper);
    }

    .mobile-menu {
        display: none;
        position: fixed;
        top: 68px;
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--ink);
        z-index: 999;
        padding: 48px 32px;
        flex-direction: column;
        gap: 28px;
    }

    .mobile-menu.is-open {
        display: flex;
        animation: fadeIn 0.25s ease-out;
    }

    .mobile-menu a {
        color: #fff;
        font-size: 20px;
        font-family: var(--font-serif);
        border-bottom: 1px solid var(--border-dark);
        padding-bottom: 14px;
    }

    .mobile-menu a.is-active {
        color: var(--gold-soft);
    }

    /* Hero 区域 */
    .hero-section {
        position: relative;
        background: var(--ink);
        padding: 120px 0 100px;
        color: #fff;
        overflow: hidden;
    }

    .hero-bg {
        position: absolute;
        inset: 0;
        background-image: url('/assets/images/backpic/back-1.webp');
        background-size: cover;
        background-position: center;
        opacity: 0.4;
    }

    .hero-bg-overlay {
        position: absolute;
        inset: 0;
        background: linear-gradient(135deg, rgba(22, 24, 23, 0.96) 10%, rgba(22, 24, 23, 0.7) 50%, rgba(22, 24, 23, 0.9) 90%);
    }

    .hero-content {
        position: relative;
        z-index: 2;
        max-width: 820px;
        margin: 0 auto;
        text-align: center;
    }

    .hero-topline {
        display: inline-block;
        background: var(--brand-light);
        border: 1px solid rgba(196, 131, 58, 0.3);
        color: var(--gold-soft);
        font-size: 13px;
        letter-spacing: 0.12em;
        padding: 6px 22px;
        border-radius: var(--radius-btn);
        margin-bottom: 28px;
        font-weight: 600;
    }

    .hero-title {
        font-family: var(--font-serif);
        font-size: 44px;
        font-weight: 800;
        line-height: 1.25;
        margin-bottom: 20px;
        color: #fff;
        letter-spacing: 0.02em;
    }

    .hero-subtitle {
        font-size: 17px;
        line-height: 1.9;
        color: rgba(255, 255, 255, 0.82);
        margin-bottom: 40px;
        max-width: 640px;
        margin-left: auto;
        margin-right: auto;
    }

    .hero-btns {
        display: flex;
        gap: 16px;
        justify-content: center;
        flex-wrap: wrap;
        margin-bottom: 36px;
    }

    .btn-primary {
        background: var(--brand);
        color: #fff;
        border: none;
        border-radius: var(--radius-btn);
        padding: 14px 36px;
        font-size: 15px;
        font-weight: 600;
        cursor: pointer;
        display: inline-flex;
        align-items: center;
        gap: 8px;
        transition: var(--transition);
    }

    .btn-primary:hover {
        background: var(--brand-hover);
        color: #fff;
        transform: translateY(-2px);
        box-shadow: 0 8px 24px rgba(196, 131, 58, 0.35);
    }

    .btn-primary:active {
        transform: translateY(0);
    }

    .btn-secondary {
        background: transparent;
        color: rgba(255, 255, 255, 0.9);
        border: 1px solid rgba(255, 255, 255, 0.3);
        border-radius: var(--radius-btn);
        padding: 14px 36px;
        font-size: 15px;
        cursor: pointer;
        display: inline-flex;
        align-items: center;
        gap: 8px;
        transition: var(--transition);
    }

    .btn-secondary:hover {
        border-color: #fff;
        background: rgba(255, 255, 255, 0.08);
        color: #fff;
        transform: translateY(-2px);
    }

    .hero-stats {
        display: flex;
        gap: 48px;
        justify-content: center;
        margin-top: 20px;
    }

    .hero-stat {
        text-align: center;
    }

    .hero-stat-num {
        font-family: var(--font-serif);
        font-size: 30px;
        font-weight: 800;
        color: #fff;
    }

    .hero-stat-label {
        font-size: 13px;
        color: rgba(255, 255, 255, 0.6);
        letter-spacing: 0.05em;
    }

    /* 合集目录 */
    .directory-section {
        padding: var(--space-section) 0;
        background: var(--white);
    }

    .section-label {
        font-size: 13px;
        letter-spacing: 0.12em;
        color: var(--text-sub);
        text-transform: uppercase;
        font-weight: 600;
        margin-bottom: 8px;
    }

    .directory-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 32px;
        margin-top: 12px;
    }

    .directory-arrow {
        width: 42px;
        height: 42px;
        border: 1px solid var(--border);
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        color: var(--text-main);
        font-size: 16px;
        background: #fff;
        transition: var(--transition);
    }

    .directory-item {
        padding: 36px;
        background: var(--paper);
        border-radius: var(--radius-card);
        transition: var(--transition);
        cursor: pointer;
        position: relative;
        overflow: hidden;
    }

    .directory-item:hover {
        transform: translateY(-6px);
        box-shadow: var(--shadow-lg);
        background: #FCFAF6;
    }

    .directory-item:hover .directory-arrow {
        border-color: var(--brand);
        color: var(--brand);
        transform: translateX(4px);
    }

    .directory-num {
        font-family: var(--font-serif);
        font-size: 42px;
        font-weight: 800;
        color: var(--ink);
        opacity: 0.8;
        line-height: 1;
        margin-bottom: 20px;
    }

    .directory-icon {
        position: absolute;
        top: 36px;
        right: 36px;
        width: 44px;
        height: 44px;
        border-radius: 10px;
        background: var(--white);
        display: flex;
        align-items: center;
        justify-content: center;
        color: var(--brand);
        font-size: 18px;
        box-shadow: var(--shadow-sm);
    }

    .directory-title {
        font-family: var(--font-serif);
        font-size: 20px;
        font-weight: 700;
        margin: 8px 0;
        color: var(--text-main);
    }

    .directory-desc {
        color: var(--text-sub);
        font-size: 14px;
        line-height: 1.7;
        margin-bottom: 16px;
    }

    /* CMS 列表 */
    .cms-section {
        padding: var(--space-section) 0;
        background: var(--paper);
    }

    .cms-header {
        display: flex;
        align-items: flex-end;
        justify-content: space-between;
        margin-bottom: 24px;
    }

    .section-title {
        font-family: var(--font-serif);
        font-size: 28px;
        font-weight: 700;
        color: var(--text-main);
        margin: 0;
        padding-left: 16px;
        border-left: 3px solid var(--brand);
        line-height: 1.4;
        letter-spacing: 0.02em;
    }

    .timeline-list {
        position: relative;
    }

    .timeline-item {
        display: flex;
        gap: 24px;
        padding: 26px 0;
        border-bottom: 1px solid rgba(222, 217, 206, 0.6);
        transition: var(--transition);
        position: relative;
        padding-left: 20px;
    }

    .timeline-item::before {
        content: '';
        position: absolute;
        left: 0;
        top: 32px;
        width: 6px;
        height: 6px;
        border-radius: 50%;
        background: var(--brand);
    }

    .timeline-item:last-child {
        border-bottom: none;
    }

    .timeline-date {
        flex-shrink: 0;
        width: 120px;
        text-align: right;
        font-size: 13px;
        color: var(--text-sub);
        padding-top: 4px;
    }

    .timeline-content {
        flex: 1;
    }

    .timeline-title {
        font-family: var(--font-serif);
        font-size: 18px;
        font-weight: 700;
        color: var(--text-main);
        margin-bottom: 6px;
        transition: var(--transition);
    }

    .timeline-title:hover {
        color: var(--brand);
    }

    .timeline-excerpt {
        font-size: 14px;
        color: var(--text-sub);
        line-height: 1.7;
        margin-bottom: 8px;
    }

    .timeline-meta {
        display: flex;
        align-items: center;
        gap: 16px;
        font-size: 13px;
        color: var(--text-light);
    }

    .timeline-meta .tag {
        display: inline-flex;
        align-items: center;
        background: var(--brand-light);
        color: var(--brand);
        padding: 2px 12px;
        border-radius: var(--radius-btn);
        font-size: 12px;
        font-weight: 600;
    }

    .timeline-link {
        margin-left: auto;
        font-size: 14px;
        font-weight: 600;
    }

    .empty-tip {
        text-align: center;
        padding: 48px 0;
        color: var(--text-light);
        font-size: 15px;
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 12px;
    }

    /* 精选卡片 */
    .feature-section {
        padding: var(--space-section) 0;
        background: #fff;
    }

    .feature-grid {
        display: grid;
        grid-template-columns: 1.2fr 1fr;
        gap: 24px;
        margin-top: 40px;
    }

    .feature-col {
        display: flex;
        flex-direction: column;
        gap: 24px;
    }

    .feature-card {
        border-radius: var(--radius-card);
        overflow: hidden;
        background: var(--white);
        transition: var(--transition);
        border: 1px solid rgba(222, 217, 206, 0.3);
        display: block;
    }

    .feature-card:hover {
        transform: translateY(-6px);
        box-shadow: var(--shadow-lg);
    }

    .feature-card:hover .feature-img img {
        transform: scale(1.02);
    }

    .feature-img {
        overflow: hidden;
        position: relative;
    }

    .feature-img img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform 0.2s ease-out;
    }

    .feature-img-lg {
        aspect-ratio: 4/5;
    }

    .feature-img-sm {
        aspect-ratio: 1/1;
    }

    .feature-body {
        padding: 20px 24px 24px;
    }

    .feature-tag {
        display: inline-block;
        background: var(--brand-light);
        color: var(--brand);
        font-size: 12px;
        font-weight: 600;
        border-radius: var(--radius-btn);
        padding: 2px 14px;
        margin-bottom: 10px;
    }

    .feature-title {
        font-family: var(--font-serif);
        font-size: 18px;
        font-weight: 700;
        color: var(--text-main);
        margin-bottom: 6px;
        line-height: 1.4;
    }

    .feature-excerpt {
        font-size: 14px;
        color: var(--text-sub);
        line-height: 1.7;
        margin-bottom: 14px;
    }

    .feature-link {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        font-size: 14px;
        font-weight: 600;
        color: var(--brand);
    }

    .feature-link i {
        transition: transform 0.2s ease-out;
    }

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

    /* 优势双栏 */
    .advantage-section {
        padding: var(--space-section) 0;
        background: var(--paper);
    }

    .advantage-grid {
        display: grid;
        grid-template-columns: 1fr 1.2fr;
        gap: 64px;
        align-items: center;
        margin-top: 24px;
    }

    .advantage-title {
        font-family: var(--font-serif);
        font-size: 28px;
        font-weight: 700;
        line-height: 1.4;
        color: var(--text-main);
        margin-bottom: 16px;
    }

    .advantage-desc {
        color: var(--text-sub);
        font-size: 15px;
        line-height: 1.9;
    }

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

    .advantage-list li {
        padding: 20px 0;
        border-bottom: 1px solid rgba(222, 217, 206, 0.7);
        display: flex;
        gap: 16px;
        align-items: flex-start;
    }

    .advantage-list li:last-child {
        border-bottom: none;
    }

    .advantage-point {
        flex-shrink: 0;
    }

    .point-title {
        font-family: var(--font-serif);
        font-size: 17px;
        font-weight: 700;
        color: var(--text-main);
        margin-bottom: 4px;
    }

    .point-text {
        font-size: 14px;
        color: var(--text-sub);
        line-height: 1.6;
    }

    /* FAQ */
    .faq-section {
        padding: var(--space-section) 0;
        background: #F3F0EA;
    }

    .faq-list {
        max-width: 840px;
        margin: 40px auto 0;
        background: #fff;
        border-radius: var(--radius-card);
        overflow: hidden;
        box-shadow: var(--shadow-sm);
    }

    .faq-item {
        border-bottom: 1px solid var(--border);
    }

    .faq-item:last-child {
        border-bottom: none;
    }

    .faq-question {
        width: 100%;
        text-align: left;
        background: transparent;
        border: none;
        padding: 22px 28px;
        font-size: 16px;
        font-weight: 600;
        cursor: pointer;
        display: flex;
        justify-content: space-between;
        align-items: center;
        gap: 16px;
        color: var(--text-main);
        font-family: var(--font-serif);
        transition: var(--transition);
    }

    .faq-question:hover {
        background: rgba(245, 242, 235, 0.6);
    }

    .faq-question:focus {
        outline: 2px solid var(--brand);
        outline-offset: -2px;
    }

    .faq-question .icon {
        width: 28px;
        height: 28px;
        border-radius: 50%;
        background: var(--paper);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 14px;
        flex-shrink: 0;
        transition: transform 0.2s ease-out;
    }

    .faq-item.is-active .faq-question .icon {
        transform: rotate(45deg);
    }

    .faq-answer {
        padding: 0 28px;
        max-height: 0;
        overflow: hidden;
        transition: all 0.25s ease-out;
        color: var(--text-sub);
    }

    .faq-item.is-active .faq-answer {
        max-height: 300px;
        padding-bottom: 22px;
        opacity: 1;
    }

    .faq-answer p {
        margin: 0;
        font-size: 15px;
        line-height: 1.8;
    }

    /* CTA */
    .cta-section {
        padding: var(--space-section) 0;
        background: var(--white);
    }

    .cta-card {
        border: 1px solid rgba(196, 131, 58, 0.3);
        border-radius: 16px;
        padding: 64px 48px;
        text-align: center;
        background: var(--paper);
        position: relative;
        overflow: hidden;
    }

    .cta-card::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        height: 2px;
        background: linear-gradient(90deg, var(--brand), var(--gold-soft));
    }

    .cta-title {
        font-family: var(--font-serif);
        font-size: 30px;
        font-weight: 800;
        color: #23231F;
        margin-bottom: 12px;
    }

    .cta-text {
        color: var(--text-sub);
        max-width: 480px;
        margin: 0 auto 32px;
    }

    .cta-actions {
        display: flex;
        justify-content: center;
        gap: 12px;
        flex-wrap: wrap;
    }

    .btn-text {
        background: transparent;
        border: none;
        color: var(--text-main);
        cursor: pointer;
        display: inline-flex;
        align-items: center;
        gap: 8px;
        font-size: 14px;
        padding: 12px 22px;
        text-decoration: underline;
        text-underline-offset: 4px;
        text-decoration-thickness: 1px;
        transition: var(--transition);
    }

    .btn-text:hover {
        color: var(--brand);
    }

    /* 站点地图 / 页脚 */
    .site-footer {
        background: var(--ink);
        color: rgba(255, 255, 255, 0.7);
        padding: 64px 0 24px;
    }

    .footer-grid {
        display: grid;
        grid-template-columns: 1.4fr 1fr 1fr;
        gap: 48px;
        margin-bottom: 48px;
    }

    .footer-brand {
        display: flex;
        align-items: center;
        gap: 10px;
        margin-bottom: 16px;
    }

    .footer-brand .brand-name {
        color: #fff;
        font-size: 20px;
    }

    .footer-brand .brand-icon {
        background: rgba(255, 255, 255, 0.12);
        color: var(--gold-soft);
        width: 36px;
        height: 36px;
        border-radius: 8px;
    }

    .footer-about {
        font-size: 14px;
        line-height: 1.8;
        margin-bottom: 20px;
        opacity: 0.9;
        max-width: 360px;
    }

    .footer-title {
        color: #fff;
        font-family: var(--font-serif);
        font-size: 16px;
        font-weight: 700;
        margin-bottom: 20px;
    }

    .footer-links {
        display: flex;
        flex-direction: column;
        gap: 10px;
        font-size: 14px;
    }

    .footer-links a {
        color: rgba(255, 255, 255, 0.7);
        transition: var(--transition);
    }

    .footer-links a:hover {
        color: var(--gold-soft);
        padding-left: 4px;
    }

    .footer-bottom {
        border-top: 1px solid rgba(255, 255, 255, 0.12);
        padding-top: 24px;
        display: flex;
        justify-content: space-between;
        flex-wrap: wrap;
        gap: 12px;
        font-size: 13px;
        color: rgba(255, 255, 255, 0.38);
    }

    /* 通用工具类 */
    .text-center {
        text-align: center;
    }

    /* 移动端呼吸 */
    @keyframes fadeIn {
        from {
            opacity: 0;
            transform: translateY(-12px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
        .directory-grid {
            grid-template-columns: 1fr;
        }

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

        .header-nav {
            gap: 14px;
        }

        .header-search {
            display: none;
        }

        .header-tools .header-login {
            display: none;
        }

        .advantage-grid {
            grid-template-columns: 1fr;
            gap: 32px;
        }
    }

    @media (max-width: 768px) {
        :root {
            --space-section: 56px;
        }

        .top-bar {
            display: none;
        }

        .header-inner {
            padding: 0 16px;
        }

        .header-nav {
            display: none;
        }

        .brand-name {
            font-size: 16px;
        }

        .header-search {
            display: none;
        }

        .header-login {
            display: none;
        }

        .header-cta {
            display: none;
        }

        .burger-btn {
            display: flex;
        }

        .mobile-menu {
            top: 68px;
        }

        .site-header {
            background: rgba(255, 255, 255, 0.98);
        }

        .hero-section {
            padding: 64px 0 48px;
        }

        .hero-title {
            font-size: 28px;
        }

        .hero-subtitle {
            font-size: 15px;
        }

        .hero-stats {
            gap: 24px;
        }

        .hero-stat-num {
            font-size: 24px;
        }

        .directory-item {
            padding: 24px;
        }

        .timeline-item {
            flex-direction: column;
            gap: 8px;
        }

        .timeline-date {
            text-align: left;
            width: auto;
        }

        .timeline-item {
            padding-left: 16px;
        }

        .cms-header {
            flex-wrap: wrap;
        }

        .feature-img-lg,
        .feature-img-sm {
            aspect-ratio: 16/9;
        }

        .cta-card {
            padding: 40px 20px;
        }

        .cta-actions {
            flex-direction: column;
            align-items: center;
        }

        .footer-grid {
            grid-template-columns: 1fr;
            gap: 32px;
        }

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

        .header-tools {
            gap: 8px;
        }
    }

    @media (max-width: 520px) {
        .brand-icon {
            width: 28px;
            height: 28px;
            font-size: 13px;
        }

        .brand-name {
            font-size: 14px;
        }

        .burger-btn {
            width: 36px;
            height: 36px;
            font-size: 16px;
            border-radius: 6px;
        }

        .hero-title {
            font-size: 24px;
        }

        .btns-primary, .btns-secondary {
            padding: 12px 24px;
        }

        .hero-topline {
            font-size: 11px;
        }

        .faq-question {
            padding: 16px;
            font-size: 16px;
        }
    }

    /* 专注访问 */
    .btn:focus-visible,
    a:focus-visible,
    input:focus-visible {
        outline: 2px solid var(--brand);
        outline-offset: 2px;
    }

/* roulang page: category1 */
:root {
            --ink: #161817;
            --ink-2: #1e241f;
            --paper: #f5f2eb;
            --card: #ffffff;
            --accent: #c4833a;
            --accent-dark: #9f5f24;
            --accent-light: #d69a57;
            --text: #23231f;
            --muted: #6a675e;
            --line: #ded9ce;
            --white: #ffffff;
            --radius: 8px;
            --radius-card: 12px;
            --shadow-sm: 0 2px 10px rgba(20, 20, 20, 0.04);
            --shadow-lg: 0 18px 40px -18px rgba(15, 20, 20, 0.18);
            --transition: 0.2s ease-out;
            --font-serif: "Source Han Serif SC", "Noto Serif SC", "Songti SC", SimSun, serif;
            --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            background: var(--paper);
            color: var(--text);
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.8;
            -webkit-font-smoothing: antialiased;
            text-rendering: optimizeLegibility;
        }

        body.nav-open {
            overflow: hidden;
        }

        img {
            max-width: 100%;
            display: block;
            border: 0;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition), background var(--transition), border-color var(--transition), box-shadow var(--transition);
        }

        ul,
        ol {
            margin: 0;
            padding: 0;
            list-style: none;
        }

        button,
        input {
            font: inherit;
        }

        h1,
        h2,
        h3 {
            margin: 0;
            font-family: var(--font-serif);
            font-weight: 800;
            line-height: 1.3;
            color: #1c1e1a;
        }

        ::selection {
            background: rgba(196, 131, 58, 0.3);
            color: var(--ink);
        }

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

        main {
            padding-top: 68px;
            overflow: hidden;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 600;
            line-height: 1;
            border: 1px solid transparent;
            cursor: pointer;
            transition: transform 0.18s ease-out, background 0.18s ease-out, color 0.18s ease-out, border-color 0.18s ease-out, box-shadow 0.18s ease-out;
            white-space: nowrap;
        }

        .btn:hover,
        .btn:focus {
            outline: none;
        }

        .btn-primary {
            background: var(--accent);
            color: #fff;
            box-shadow: 0 12px 26px -16px rgba(196, 131, 58, 0.55);
        }

        .btn-primary:hover {
            background: var(--accent-dark);
            transform: translateY(-2px);
            box-shadow: 0 18px 34px -18px rgba(159, 95, 36, 0.55);
        }

        .btn-primary:focus-visible {
            outline: 2px solid var(--accent-light);
            outline-offset: 3px;
        }

        .btn-outline-light {
            border-color: rgba(255, 255, 255, 0.4);
            color: #fff;
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: var(--accent-light);
            transform: translateY(-2px);
        }

        .btn-dark-outline {
            border-color: var(--accent);
            color: var(--accent-dark);
        }

        .btn-dark-outline:hover {
            background: rgba(196, 131, 58, 0.08);
            transform: translateY(-2px);
        }

        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 68px;
            z-index: 90;
            background: rgba(22, 24, 23, 0.72);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            transition: background 0.25s ease-out, box-shadow 0.25s ease-out;
        }

        .site-header.is-scrolled {
            background: rgba(14, 16, 15, 0.94);
            box-shadow: 0 12px 30px -18px rgba(0, 0, 0, 0.4);
        }

        .header-inner {
            height: 68px;
            display: flex;
            align-items: center;
            gap: 30px;
        }

        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            color: #fff;
            font-size: 18px;
            font-weight: 800;
            letter-spacing: 0.02em;
            font-family: var(--font-serif);
            flex-shrink: 0;
        }

        .brand-logo .brand-icon {
            width: 32px;
            height: 32px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
            background: var(--accent);
            color: #fff;
            font-size: 15px;
            box-shadow: 0 6px 14px -6px rgba(196, 131, 58, 0.55);
        }

        .brand-logo:hover {
            color: #fff;
            opacity: 0.92;
        }

        .header-nav {
            display: flex;
            align-items: center;
            gap: 26px;
            margin-left: auto;
        }

        .header-nav a {
            position: relative;
            padding: 10px 0 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.72);
            font-weight: 500;
            letter-spacing: 0.02em;
        }

        .header-nav a::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 100%;
            height: 2px;
            background: var(--accent);
            border-radius: 4px;
            transform: scaleX(0);
            transform-origin: left;
            transition: transform 0.22s ease-out;
        }

        .header-nav a:hover,
        .header-nav a.is-active {
            color: #fff;
        }

        .header-nav a:hover::after,
        .header-nav a.is-active::after {
            transform: scaleX(1);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .search-mini {
            display: flex;
            align-items: center;
            gap: 8px;
            width: 168px;
            height: 38px;
            padding: 0 12px;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.14);
            border-radius: 999px;
            transition: border-color 0.2s ease-out, background 0.2s ease-out;
        }

        .search-mini i {
            color: rgba(255, 255, 255, 0.6);
            font-size: 13px;
        }

        .search-mini input {
            width: 100%;
            border: 0;
            background: transparent;
            color: #fff;
            font-size: 13px;
            outline: 0;
        }

        .search-mini input::placeholder {
            color: rgba(255, 255, 255, 0.45);
        }

        .search-mini:focus-within {
            border-color: var(--accent);
            background: rgba(255, 255, 255, 0.12);
        }

        .text-link {
            color: rgba(255, 255, 255, 0.82);
            font-size: 14px;
        }

        .text-link:hover {
            color: var(--accent-light);
        }

        .btn-compact {
            padding: 10px 16px;
            font-size: 13px;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 42px;
            height: 42px;
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: 50%;
            cursor: pointer;
            align-items: center;
        }

        .nav-toggle span {
            width: 18px;
            height: 2px;
            background: #fff;
            border-radius: 2px;
            transition: transform 0.25s ease-out, opacity 0.25s ease-out;
        }

        body.nav-open .nav-toggle span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        body.nav-open .nav-toggle span:nth-child(2) {
            opacity: 0;
        }

        body.nav-open .nav-toggle span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .category-hero {
            position: relative;
            min-height: 700px;
            display: flex;
            align-items: center;
            color: #fff;
            overflow: hidden;
            background-color: var(--ink);
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url("/assets/images/backpic/back-2.png");
            background-size: cover;
            background-position: center;
        }

        .hero-bg::after {
            content: "";
            position: absolute;
            inset: 0;
            background: rgba(22, 24, 23, 0.7);
        }

        .hero-inner {
            position: relative;
            z-index: 2;
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            width: 100%;
            padding-top: 80px;
            padding-bottom: 96px;
        }

        .hero-crumb {
            display: flex;
            align-items: center;
            gap: 8px;
            color: rgba(255, 255, 255, 0.55);
            font-size: 13px;
            margin-bottom: 40px;
        }

        .hero-crumb a {
            color: rgba(255, 255, 255, 0.7);
        }

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

        .hero-crumb i {
            font-size: 10px;
        }

        .hero-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.04em;
            color: var(--accent-light);
            background: rgba(196, 131, 58, 0.12);
            border: 1px solid rgba(196, 131, 58, 0.22);
            border-radius: 999px;
            padding: 7px 14px;
            margin: 0 0 22px;
        }

        .category-hero h1 {
            color: #fff;
            font-size: clamp(40px, 6vw, 64px);
            line-height: 1.1;
            letter-spacing: 0.02em;
        }

        .hero-lead {
            max-width: 680px;
            margin: 20px 0 0;
            color: rgba(255, 255, 255, 0.8);
            font-size: 17px;
            line-height: 1.9;
        }

        .hero-stats {
            display: flex;
            align-items: center;
            gap: 44px;
            margin: 40px 0 34px;
        }

        .hero-stats div {
            display: flex;
            flex-direction: column;
        }

        .hero-stats strong {
            font-family: var(--font-serif);
            font-size: 34px;
            line-height: 1.2;
            color: var(--accent-light);
        }

        .hero-stats span {
            color: rgba(255, 255, 255, 0.58);
            font-size: 13px;
            letter-spacing: 0.04em;
            margin-top: 4px;
        }

        .hero-actions {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-wrap: wrap;
        }

        .content-section {
            padding: 100px 0;
        }

        .section-paper {
            background: var(--paper);
        }

        .section-white {
            background: #fff;
        }

        .section-dark {
            background: var(--ink);
            color: rgba(255, 255, 255, 0.75);
        }

        .section-head {
            max-width: 760px;
            margin-bottom: 64px;
        }

        .section-head.center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 0.04em;
            color: var(--accent-dark);
            background: rgba(196, 131, 58, 0.1);
            border: 1px solid rgba(196, 131, 58, 0.16);
            border-radius: 999px;
            padding: 6px 14px;
            margin-bottom: 18px;
        }

        .section-dark .section-tag {
            color: #f2c18a;
            background: rgba(196, 131, 58, 0.14);
            border-color: rgba(196, 131, 58, 0.28);
        }

        .section-head h2 {
            font-size: clamp(30px, 4vw, 40px);
            line-height: 1.28;
            color: var(--text);
            letter-spacing: 0.01em;
        }

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

        .section-head p {
            color: var(--muted);
            margin-top: 16px;
            font-size: 16px;
            line-height: 1.9;
        }

        .section-dark .section-head p {
            color: rgba(255, 255, 255, 0.66);
        }

        .catalog-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 22px;
        }

        .catalog-link {
            display: grid;
            grid-template-columns: auto 1fr;
            gap: 4px 18px;
            padding: 34px 30px;
            background: #fff;
            border: 1px solid var(--line);
            border-radius: 12px;
            transition: transform 0.22s ease-out, box-shadow 0.22s ease-out, border-color 0.22s ease-out;
        }

        .catalog-link .num {
            grid-row: span 3;
            font-family: var(--font-serif);
            font-size: 42px;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.1;
        }

        .catalog-link .cat-title {
            font-size: 20px;
            font-weight: 800;
            color: var(--text);
            font-family: var(--font-serif);
        }

        .catalog-link .cat-desc {
            color: var(--muted);
            font-size: 14px;
            line-height: 1.8;
            margin-top: 4px;
        }

        .catalog-link .go-arrow {
            margin-top: 12px;
            font-size: 14px;
            color: var(--accent-dark);
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .catalog-link .go-arrow i {
            transition: transform 0.2s ease-out;
        }

        .catalog-link:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(196, 131, 58, 0.28);
        }

        .catalog-link:hover .go-arrow i {
            transform: translateX(4px);
        }

        .split-grid {
            display: grid;
            grid-template-columns: 1.05fr 0.95fr;
            gap: 64px;
            align-items: center;
        }

        .split-media {
            position: relative;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        .split-media img {
            width: 100%;
            aspect-ratio: 4 / 5;
            object-fit: cover;
            transition: transform 0.4s ease-out;
        }

        .split-media:hover img {
            transform: scale(1.02);
        }

        .split-body h2 {
            font-size: clamp(28px, 3.6vw, 38px);
            margin-bottom: 18px;
            color: var(--text);
        }

        .split-body p {
            color: var(--muted);
            line-height: 1.9;
            margin-bottom: 24px;
        }

        .bullet-list {
            display: grid;
            gap: 18px;
            margin-top: 26px;
            padding: 0;
        }

        .bullet-list li {
            display: grid;
            grid-template-columns: 22px 1fr;
            gap: 12px;
            align-items: flex-start;
            font-size: 15px;
            color: var(--text);
            line-height: 1.8;
        }

        .bullet-list li i {
            color: var(--accent);
            margin-top: 6px;
            font-size: 14px;
        }

        .split-label {
            display: block;
            font-size: 13px;
            color: var(--accent-dark);
            font-weight: 700;
            letter-spacing: 0.04em;
            margin-bottom: 10px;
        }

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

        .case-card {
            display: flex;
            flex-direction: column;
            background: #fff;
            border: 1px solid var(--line);
            border-radius: 12px;
            overflow: hidden;
            transition: transform 0.22s ease-out, box-shadow 0.22s ease-out, border-color 0.22s ease-out;
        }

        .case-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(196, 131, 58, 0.2);
        }

        .case-cover {
            position: relative;
            overflow: hidden;
            aspect-ratio: 1 / 1;
            background: #e4dfd4;
        }

        .case-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease-out;
        }

        .case-card:hover .case-cover img {
            transform: scale(1.03);
        }

        .case-body {
            display: flex;
            flex-direction: column;
            gap: 8px;
            padding: 28px;
            flex: 1;
        }

        .case-tag {
            align-self: flex-start;
            font-size: 12px;
            font-weight: 700;
            color: var(--accent-dark);
            background: rgba(196, 131, 58, 0.1);
            border-radius: 999px;
            padding: 4px 10px;
        }

        .case-body h3 {
            font-size: 18px;
            line-height: 1.45;
            color: var(--text);
        }

        .case-body p {
            color: var(--muted);
            font-size: 14px;
            line-height: 1.75;
            margin-bottom: 8px;
        }

        .case-a {
            margin-top: auto;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--accent-dark);
        }

        .case-a i {
            transition: transform 0.2s ease-out;
        }

        .case-card:hover .case-a i {
            transform: translateX(4px);
        }

        .trend-wrap {
            display: grid;
            grid-template-columns: 0.95fr 1.05fr;
            gap: 60px;
            align-items: center;
        }

        .trend-media img {
            width: 100%;
            aspect-ratio: 4 / 5;
            object-fit: cover;
            border-radius: 14px;
            box-shadow: 0 30px 60px -36px rgba(0, 0, 0, 0.7);
        }

        .trend-main h2 {
            color: #fff;
            font-size: clamp(30px, 3.8vw, 40px);
            margin-bottom: 20px;
        }

        .trend-main > p {
            color: rgba(255, 255, 255, 0.68);
            font-size: 16px;
            line-height: 1.9;
            margin-bottom: 36px;
        }

        .trend-list {
            display: grid;
            gap: 0;
        }

        .trend-list li {
            display: grid;
            grid-template-columns: 52px 1fr;
            gap: 18px;
            padding: 22px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .trend-list li:first-child {
            padding-top: 0;
        }

        .trend-list .tn {
            font-family: var(--font-serif);
            font-size: 24px;
            color: var(--accent);
            line-height: 1.4;
            font-weight: 800;
        }

        .trend-list h3 {
            font-size: 17px;
            color: #fff;
            font-family: var(--font-sans);
            font-weight: 700;
            margin: 0 0 6px;
        }

        .trend-list p {
            color: rgba(255, 255, 255, 0.62);
            font-size: 14px;
            line-height: 1.8;
            margin: 0;
        }

        .standards-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 22px;
        }

        .standard-card {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: 12px;
            padding: 32px 26px;
            transition: transform 0.22s ease-out, box-shadow 0.22s ease-out;
        }

        .standard-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
        }

        .standard-icon {
            width: 48px;
            height: 48px;
            background: rgba(196, 131, 58, 0.1);
            color: var(--accent);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            margin-bottom: 20px;
        }

        .standard-card h3 {
            font-size: 17px;
            color: var(--text);
            margin-bottom: 8px;
            font-family: var(--font-sans);
        }

        .standard-card p {
            color: var(--muted);
            font-size: 14px;
            line-height: 1.75;
            margin: 0;
        }

        .faq-section {
            background: #f0ede5;
        }

        .faq-wrap {
            max-width: 860px;
            margin-left: auto;
            margin-right: auto;
        }

        .faq-list {
            display: grid;
            gap: 14px;
        }

        .faq-item {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: 12px;
            overflow: hidden;
            transition: box-shadow 0.22s ease-out, border-color 0.22s ease-out;
        }

        .faq-item.is-open {
            border-color: rgba(196, 131, 58, 0.3);
            box-shadow: var(--shadow-sm);
        }

        .faq-q {
            width: 100%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 20px;
            padding: 20px 24px;
            background: transparent;
            border: 0;
            text-align: left;
            cursor: pointer;
            font-size: 17px;
            font-weight: 700;
            color: var(--text);
        }

        .faq-q i {
            color: var(--accent);
            transition: transform 0.22s ease-out;
            font-size: 14px;
        }

        .faq-item.is-open .faq-q i {
            transform: rotate(180deg);
        }

        .faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
        }

        .faq-item.is-open .faq-a {
            max-height: 420px;
        }

        .faq-a-inner {
            padding: 0 24px 22px;
            color: var(--muted);
            font-size: 15px;
            line-height: 1.85;
        }

        .cta-block {
            padding: 90px 0 110px;
            background: var(--paper);
        }

        .cta-card {
            background: var(--ink);
            border: 1px solid rgba(196, 131, 58, 0.35);
            border-radius: 20px;
            color: #fff;
            text-align: center;
            padding: 76px 40px;
            position: relative;
            overflow: hidden;
            box-shadow: 0 30px 60px -36px rgba(15, 20, 20, 0.55);
        }

        .cta-card::before {
            content: "";
            position: absolute;
            inset: 0;
            background-image: url("/assets/images/backpic/back-1.webp");
            background-size: cover;
            background-position: center;
            opacity: 0.12;
        }

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

        .cta-card h2 {
            color: #fff;
            font-size: clamp(28px, 3.6vw, 38px);
            margin-bottom: 16px;
        }

        .cta-card p {
            color: rgba(255, 255, 255, 0.7);
            max-width: 620px;
            margin-left: auto;
            margin-right: auto;
            font-size: 16px;
            line-height: 1.9;
            margin-bottom: 34px;
        }

        .cta-actions {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 14px;
            flex-wrap: wrap;
        }

        .site-footer {
            background: #0c0f0d;
            color: rgba(255, 255, 255, 0.66);
            padding: 68px 0 28px;
            font-size: 14px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 50px;
            margin-bottom: 50px;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 19px;
            font-weight: 800;
            color: #fff;
            font-family: var(--font-serif);
            margin-bottom: 16px;
        }

        .footer-brand .brand-icon {
            width: 30px;
            height: 30px;
            background: var(--accent);
            border-radius: 8px;
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
        }

        .footer-about {
            color: rgba(255, 255, 255, 0.48);
            max-width: 360px;
            line-height: 1.8;
            margin: 0;
        }

        .footer-title {
            font-size: 14px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
            letter-spacing: 0.03em;
        }

        .footer-links {
            display: grid;
            gap: 10px;
        }

        .footer-links a {
            color: rgba(255, 255, 255, 0.58);
        }

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

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 24px;
            color: rgba(255, 255, 255, 0.3);
            font-size: 13px;
        }

        @media (max-width: 1024px) {
            .content-section {
                padding: 76px 0;
            }

            .header-nav {
                position: fixed;
                top: 68px;
                right: 16px;
                left: 16px;
                background: rgba(19, 22, 20, 0.98);
                backdrop-filter: blur(18px);
                border: 1px solid rgba(255, 255, 255, 0.08);
                border-radius: 16px;
                flex-direction: column;
                align-items: flex-start;
                gap: 4px;
                padding: 16px;
                margin: 0;
                opacity: 0;
                transform: translateY(-10px);
                pointer-events: none;
                transition: opacity 0.25s ease-out, transform 0.25s ease-out;
                box-shadow: 0 30px 50px -20px rgba(0, 0, 0, 0.5);
            }

            body.nav-open .header-nav {
                opacity: 1;
                transform: translateY(0);
                pointer-events: auto;
            }

            .header-nav a {
                width: 100%;
                padding: 12px 10px;
                border-radius: 8px;
                color: rgba(255, 255, 255, 0.78);
                font-size: 15px;
            }

            .header-nav a::after {
                display: none;
            }

            .header-nav a:hover,
            .header-nav a.is-active {
                background: rgba(196, 131, 58, 0.1);
                color: #fff;
            }

            .header-actions {
                display: none;
            }

            .nav-toggle {
                display: inline-flex;
                margin-left: auto;
            }

            .brand-logo {
                font-size: 16px;
            }

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

            .split-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .split-media {
                max-width: 640px;
            }

            .split-media img {
                aspect-ratio: 16 / 10;
            }

            .trend-wrap {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .trend-media img {
                aspect-ratio: 16 / 10;
                max-height: 520px;
            }

            .case-card-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 16px;
            }

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

        @media (max-width: 767px) {
            .container-main {
                padding-left: 18px;
                padding-right: 18px;
            }

            .content-section {
                padding: 56px 0;
            }

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

            .catalog-link {
                padding: 26px 22px;
            }

            .case-card-grid {
                grid-template-columns: 1fr;
            }

            .case-cover {
                aspect-ratio: 16 / 10;
            }

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

            .category-hero {
                min-height: 620px;
            }

            .hero-inner {
                padding-top: 60px;
                padding-bottom: 70px;
            }

            .hero-stats {
                gap: 30px;
                flex-wrap: wrap;
            }

            .hero-stats strong {
                font-size: 28px;
            }

            .hero-actions {
                gap: 10px;
            }

            .hero-actions .btn {
                width: 100%;
            }

            .section-head h2 {
                font-size: 28px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 36px;
            }

            .cta-card {
                padding: 48px 20px;
            }

            .cta-actions .btn {
                width: 100%;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        @media (max-width: 520px) {
            .brand-logo .brand-text {
                max-width: 145px;
                overflow: hidden;
                text-overflow: ellipsis;
                white-space: nowrap;
            }

            .content-section {
                padding: 46px 0;
            }

            .footer-bottom {
                gap: 8px;
            }
        }

/* roulang page: article */
:root {
            --ink: #161817;
            --ink-lift: #23231F;
            --deep: #1E241F;
            --gold: #C4833A;
            --gold-dark: #9F5F24;
            --gold-soft: #E2B57A;
            --paper: #F5F2EB;
            --paper-deep: #ECE7DC;
            --bg: #FBF9F5;
            --white: #FFFFFF;
            --text: #23231F;
            --muted: #6A675E;
            --line: #DED9CE;
            --line-dark: rgba(255, 255, 255, 0.14);
            --radius: 8px;
            --radius-img: 4px;
            --radius-pill: 999px;
            --shadow-sm: 0 2px 10px rgba(20, 20, 20, 0.04);
            --shadow-lg: 0 18px 40px -18px rgba(15, 20, 20, 0.18);
            --transition: 180ms ease-out;
            --serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", Georgia, serif;
            --sans: "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            background: var(--bg);
            color: var(--text);
            font-family: var(--sans);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            text-rendering: optimizeLegibility;
        }

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

        a {
            color: inherit;
            text-decoration: none;
        }

        button {
            font-family: inherit;
        }

        h1,
        h2,
        h3,
        h4 {
            margin: 0;
            font-family: var(--serif);
            line-height: 1.3;
            color: var(--text);
        }

        p {
            margin: 0 0 1em;
        }

        .container-main {
            width: min(1200px, 100% - 40px);
            margin-inline: auto;
        }

        .container-reading {
            width: min(860px, 100% - 40px);
            margin-inline: auto;
        }

        .site-main {
            display: block;
        }

        .is-hidden {
            display: none !important;
        }

        ::selection {
            background: rgba(196, 131, 58, 0.25);
        }

        :focus-visible {
            outline: 2px solid var(--gold);
            outline-offset: 3px;
        }

        .btn-primary,
        .btn-gold,
        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            height: 44px;
            padding: 0 24px;
            border-radius: var(--radius-pill);
            font-size: 14px;
            font-weight: 600;
            letter-spacing: 0.04em;
            transition: background var(--transition), color var(--transition), border-color var(--transition), transform var(--transition), box-shadow var(--transition);
            border: 1px solid transparent;
            cursor: pointer;
        }

        .btn-primary {
            background: var(--gold);
            color: #fff;
        }

        .btn-primary:hover {
            background: var(--gold-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-lg);
        }

        .btn-outline {
            background: transparent;
            border-color: rgba(255, 255, 255, 0.45);
            color: #fff;
        }

        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(255, 255, 255, 0.8);
            color: #fff;
        }

        .btn-gold {
            background: var(--gold);
            color: #fff;
        }

        .btn-gold:hover {
            background: var(--gold-dark);
            transform: translateY(-2px);
            box-shadow: 0 18px 34px -18px rgba(196, 131, 58, 0.4);
        }

        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            margin: 0 0 12px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--gold-dark);
        }

        .eyebrow::before {
            content: "";
            width: 20px;
            height: 1px;
            background: var(--gold);
        }

        .section-pad {
            padding: 90px 0;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 60;
            height: 68px;
            background: transparent;
            border-bottom: 1px solid transparent;
            transition: background var(--transition), border-color var(--transition), box-shadow var(--transition);
        }

        .site-header.is-scrolled {
            background: rgba(255, 255, 255, 0.94);
            border-bottom: 1px solid rgba(222, 217, 206, 0.8);
            box-shadow: var(--shadow-sm);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
        }

        .header-inner {
            height: 68px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            transition: height var(--transition);
        }

        .brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            flex: 0 0 auto;
            color: #fff;
            transition: color var(--transition);
        }

        .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            border-radius: 6px;
            background: var(--gold);
            color: #fff;
            font-size: 14px;
            box-shadow: 0 6px 18px rgba(196, 131, 58, 0.3);
        }

        .brand-name {
            font-family: var(--serif);
            font-size: 19px;
            font-weight: 800;
            letter-spacing: 0.06em;
        }

        .header-nav {
            display: flex;
            align-items: center;
            gap: 28px;
            margin-left: auto;
        }

        .header-nav a {
            position: relative;
            display: inline-block;
            padding: 8px 0;
            font-size: 14px;
            font-weight: 500;
            letter-spacing: 0.04em;
            color: rgba(255, 255, 255, 0.88);
            transition: color var(--transition);
        }

        .header-nav a::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 100%;
            height: 2px;
            background: var(--gold-soft);
            transform: scaleX(0);
            transform-origin: left;
            transition: transform var(--transition);
        }

        .header-nav a:hover,
        .header-nav a.is-active {
            color: #fff;
        }

        .header-nav a:hover::after,
        .header-nav a.is-active::after {
            transform: scaleX(1);
        }

        .site-header.is-scrolled .brand,
        .site-header.is-scrolled .brand a,
        .site-header.is-scrolled .brand-name {
            color: var(--text);
        }

        .site-header.is-scrolled .brand-icon {
            color: #fff;
        }

        .site-header.is-scrolled .header-nav a {
            color: var(--muted);
        }

        .site-header.is-scrolled .header-nav a:hover,
        .site-header.is-scrolled .header-nav a.is-active {
            color: var(--text);
        }

        .site-header.is-scrolled .header-nav a::after {
            background: var(--gold);
        }

        /* ===== Article Banner ===== */
        .article-banner {
            position: relative;
            padding: 146px 0 72px;
            background-color: var(--ink);
            background-image: url("/assets/images/backpic/back-1.webp");
            background-position: center;
            background-size: cover;
            color: #fff;
            overflow: hidden;
        }

        .article-banner::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(22, 24, 23, 0.8), rgba(22, 24, 23, 0.6));
            pointer-events: none;
        }

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

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 20px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.72);
        }

        .breadcrumb a {
            color: rgba(255, 255, 255, 0.72);
            transition: color var(--transition);
        }

        .breadcrumb a:hover {
            color: var(--gold-soft);
        }

        .breadcrumb .fa-angle-right {
            font-size: 11px;
            color: rgba(255, 255, 255, 0.5);
        }

        .breadcrumb .crumb-current {
            color: var(--gold-soft);
        }

        .article-eyebrow {
            display: flex;
            align-items: center;
            gap: 12px;
            margin: 0 0 12px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.1em;
            color: rgba(255, 255, 255, 0.7);
        }

        .article-eyebrow::before {
            content: "";
            width: 26px;
            height: 1px;
            background: var(--gold);
        }

        .article-banner h1 {
            max-width: 920px;
            margin: 0 0 20px;
            color: #fff;
            font-size: clamp(30px, 4.6vw, 46px);
            font-weight: 800;
            line-height: 1.25;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 12px;
            margin-top: 22px;
        }

        .meta-chip {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            min-height: 32px;
            padding: 0 14px;
            border-radius: var(--radius-pill);
            border: 1px solid rgba(255, 255, 255, 0.22);
            background: rgba(255, 255, 255, 0.06);
            color: rgba(255, 255, 255, 0.92);
            font-size: 13px;
            letter-spacing: 0.02em;
        }

        .meta-chip i {
            color: var(--gold-soft);
        }

        /* ===== Article Body ===== */
        .article-body {
            padding: 52px 0 10px;
            background: var(--bg);
        }

        .article-cover-wrap {
            display: block;
            margin: 0 0 46px;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            background: var(--paper-deep);
        }

        .article-cover-wrap img {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            transition: transform 240ms ease-out;
        }

        .article-cover-wrap:hover img {
            transform: scale(1.02);
        }

        .article-content {
            font-size: 16px;
            line-height: 2;
        }

        .article-content > * {
            margin-bottom: 1.5em;
        }

        .article-content p {
            margin-bottom: 1.5em;
            color: var(--text);
        }

        .article-content h2 {
            margin-top: 2.2em;
            margin-bottom: 0.7em;
            font-size: 26px;
            font-weight: 800;
        }

        .article-content h3 {
            margin-top: 1.6em;
            margin-bottom: 0.6em;
            font-size: 20px;
            font-weight: 700;
        }

        .article-content a {
            color: var(--gold-dark);
            border-bottom: 1px solid rgba(159, 95, 36, 0.3);
            transition: border-color var(--transition);
        }

        .article-content a:hover {
            border-bottom-color: var(--gold-dark);
        }

        .article-content blockquote {
            position: relative;
            margin: 2em 0;
            padding: 20px 24px 20px 30px;
            border: 0;
            border-left: 4px solid var(--gold);
            background: var(--paper);
            border-radius: 0 var(--radius) var(--radius) 0;
            font-family: var(--serif);
            font-size: 17px;
            color: var(--ink-lift);
        }

        .article-content blockquote p {
            margin-bottom: 0;
        }

        .article-content img {
            border-radius: var(--radius-img);
            margin: 2em 0;
        }

        .article-content ul,
        .article-content ol {
            padding-left: 1.4em;
            margin-bottom: 1.5em;
        }

        .article-content ul li,
        .article-content ol li {
            margin-bottom: 0.5em;
        }

        .article-content strong {
            color: var(--ink-lift);
        }

        .article-content hr {
            margin: 2.4em 0;
            border: 0;
            border-top: 1px solid var(--line);
        }

        /* ===== Article Meta / Tags ===== */
        .article-taxonomy {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 10px;
            margin: 54px 0 28px;
            padding: 20px 0;
            border-top: 1px solid var(--line);
            border-bottom: 1px solid var(--line);
        }

        .article-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            min-height: 34px;
            padding: 0 14px;
            background: var(--paper);
            border: 1px solid var(--line);
            border-radius: var(--radius-pill);
            color: var(--muted);
            font-size: 13px;
            letter-spacing: 0.02em;
        }

        .article-tag i {
            color: var(--gold);
        }

        .article-share-wrap {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 12px;
            margin-bottom: 42px;
        }

        .share-title {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--muted);
            font-size: 14px;
            font-weight: 600;
        }

        .share-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            min-height: 38px;
            padding: 0 18px;
            background: var(--white);
            border: 1px solid var(--line);
            border-radius: var(--radius-pill);
            color: var(--text);
            font-size: 13px;
            font-weight: 500;
            cursor: pointer;
            transition: background var(--transition), border-color var(--transition), transform var(--transition), color var(--transition);
        }

        .share-btn i {
            color: var(--gold);
        }

        .share-btn:hover {
            background: var(--paper);
            border-color: rgba(196, 131, 58, 0.5);
            transform: translateY(-2px);
        }

        /* ===== Article Navigation ===== */
        .article-nav-links {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
            margin-bottom: 70px;
        }

        .article-nav-link {
            display: flex;
            flex-direction: column;
            gap: 4px;
            padding: 20px 22px;
            background: var(--white);
            border: 1px solid var(--line);
            border-radius: var(--radius);
            transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
        }

        .article-nav-link.nav-next {
            text-align: right;
            align-items: flex-end;
        }

        .article-nav-link small {
            font-size: 12px;
            color: var(--muted);
        }

        .article-nav-link strong {
            font-size: 15px;
            color: var(--text);
        }

        .article-nav-link:hover {
            transform: translateY(-4px);
            border-color: rgba(196, 131, 58, 0.4);
            box-shadow: var(--shadow-sm);
        }

        .article-nav-link i {
            color: var(--gold);
            transition: transform var(--transition);
        }

        .article-nav-link:hover i {
            transform: translateX(4px);
        }

        .article-nav-link.nav-next:hover i {
            transform: translateX(-4px);
        }

        /* ===== Related Section ===== */
        .related-section {
            padding: 80px 0;
            background: var(--paper);
            border-top: 1px solid var(--line);
        }

        .related-head {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 24px;
            margin-bottom: 38px;
        }

        .related-head .eyebrow {
            margin-bottom: 10px;
        }

        .related-head h2 {
            font-size: 30px;
            font-weight: 800;
        }

        .related-more {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--gold-dark);
            font-size: 14px;
            font-weight: 600;
            white-space: nowrap;
            transition: gap var(--transition);
        }

        .related-more:hover {
            gap: 12px;
        }

        .topic-card {
            position: relative;
            display: block;
            height: 100%;
            background: var(--white);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--line);
            transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
        }

        .topic-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(196, 131, 58, 0.3);
        }

        .topic-card-media {
            width: 100%;
            aspect-ratio: 3 / 1.8;
            overflow: hidden;
            background: var(--paper-deep);
        }

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

        .topic-card:hover .topic-card-media img {
            transform: scale(1.03);
        }

        .topic-card-content {
            padding: 24px 26px 26px;
        }

        .topic-card-index {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 34px;
            height: 28px;
            margin-bottom: 14px;
            padding: 0 8px;
            border-radius: 4px;
            background: rgba(196, 131, 58, 0.12);
            color: var(--gold-dark);
            font-family: var(--serif);
            font-size: 14px;
            font-weight: 700;
            letter-spacing: 0.04em;
        }

        .topic-card h3 {
            margin-bottom: 10px;
            font-size: 21px;
            font-weight: 800;
        }

        .topic-card p {
            color: var(--muted);
            font-size: 14px;
            line-height: 1.85;
        }

        .topic-card .topic-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: 18px;
            color: var(--gold-dark);
            font-size: 13px;
            font-weight: 600;
        }

        .topic-card .topic-link i {
            transition: transform var(--transition);
        }

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

        .text-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--gold-dark);
            font-size: 14px;
            font-weight: 600;
            transition: gap var(--transition);
            border-bottom: 1px solid transparent;
        }

        .text-link:hover {
            gap: 12px;
            border-bottom-color: var(--gold-dark);
        }

        /* ===== Closing CTA ===== */
        .article-closing {
            padding: 78px 0;
            background: var(--deep);
            color: rgba(255, 255, 255, 0.88);
        }

        .article-closing h2 {
            color: #fff;
            font-size: 32px;
            font-weight: 800;
            margin-bottom: 14px;
            line-height: 1.3;
        }

        .article-closing p {
            color: rgba(255, 255, 255, 0.68);
            max-width: 560px;
            font-size: 15px;
        }

        .article-closing .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-top: 28px;
        }

        /* ===== Missing State ===== */
        .article-missing {
            min-height: 72vh;
            padding: 190px 0 90px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            background: var(--bg);
        }

        .article-empty {
            max-width: 520px;
            margin: 0 auto;
        }

        .article-empty .empty-icon {
            width: 74px;
            height: 74px;
            margin: 0 auto 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--paper);
            color: var(--gold);
            border-radius: 50%;
            font-size: 28px;
        }

        .article-empty h1 {
            font-size: 28px;
            margin-bottom: 12px;
        }

        .article-empty p {
            color: var(--muted);
            margin-bottom: 28px;
        }

        .article-empty .btn-primary {
            display: inline-flex;
            background: var(--gold);
            color: #fff;
        }

        .article-empty .btn-primary:hover {
            background: var(--gold-dark);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--ink);
            color: rgba(255, 255, 255, 0.64);
            padding: 64px 0 34px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: 50px;
            margin-bottom: 48px;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 14px;
        }

        .footer-brand .brand-icon {
            color: #fff;
        }

        .footer-brand .brand-name {
            font-family: var(--serif);
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            letter-spacing: 0.06em;
        }

        .footer-about {
            max-width: 340px;
            margin: 0;
            font-size: 14px;
            line-height: 1.9;
            color: rgba(255, 255, 255, 0.56);
        }

        .footer-title {
            margin-bottom: 16px;
            font-size: 14px;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.04em;
        }

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

        .footer-links a {
            color: rgba(255, 255, 255, 0.56);
            font-size: 14px;
            transition: color var(--transition), padding-left var(--transition);
        }

        .footer-links a:hover {
            color: var(--gold-soft);
            padding-left: 4px;
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            gap: 16px;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .header-nav {
                gap: 20px;
            }

            .brand-name {
                font-size: 17px;
            }

            .article-banner {
                padding-top: 136px;
            }

            .related-head h2 {
                font-size: 26px;
            }
        }

        @media (max-width: 768px) {
            .section-pad {
                padding: 64px 0;
            }

            .header-inner {
                flex-wrap: wrap;
                height: auto;
                padding-top: 12px;
            }

            .site-header {
                height: auto;
            }

            .site-header.is-scrolled .header-inner {
                background: transparent;
            }

            .header-nav {
                order: 3;
                width: 100%;
                margin-left: 0;
                overflow-x: auto;
                gap: 18px;
                padding: 8px 0 4px;
                scrollbar-width: none;
            }

            .header-nav::-webkit-scrollbar {
                display: none;
            }

            .header-nav a {
                flex: 0 0 auto;
                font-size: 14px;
                white-space: nowrap;
            }

            .article-banner {
                padding: 132px 0 56px;
            }

            .article-meta {
                gap: 10px;
            }

            .article-body {
                padding-top: 36px;
            }

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

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 36px;
            }

            .footer-bottom {
                flex-direction: column;
            }
        }

        @media (max-width: 640px) {
            .container-main,
            .container-reading {
                width: min(100% - 28px, 1200px);
            }

            .brand-name {
                font-size: 16px;
            }

            .brand-icon {
                width: 30px;
                height: 30px;
            }

            .article-banner {
                padding: 124px 0 48px;
            }

            .article-banner h1 {
                font-size: 28px;
                line-height: 1.3;
            }

            .meta-chip {
                min-height: 30px;
                padding: 0 12px;
                font-size: 12px;
            }

            .article-content {
                font-size: 15.5px;
                line-height: 1.95;
            }

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

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

            .related-section {
                padding: 60px 0;
            }

            .related-head {
                flex-direction: column;
                align-items: flex-start;
                margin-bottom: 28px;
            }

            .related-head h2 {
                font-size: 24px;
            }

            .article-closing h2 {
                font-size: 26px;
            }

            .share-wrap,
            .article-share-wrap {
                flex-wrap: wrap;
            }

            .footer-bottom {
                font-size: 12px;
            }
        }

        @media (max-width: 520px) {
            .brand-name {
                letter-spacing: 0.04em;
                font-size: 15px;
            }

            .header-inner {
                gap: 10px;
            }

            .header-nav a {
                font-size: 13px;
            }

            .share-btn,
            .btn-primary,
            .btn-outline,
            .btn-gold {
                min-height: 44px;
            }
        }

        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                scroll-behavior: auto !important;
                transition-duration: 0.01ms !important;
                animation-duration: 0.01ms !important;
            }
        }

/* roulang page: category2 */
:root {
            --ink: #161817;
            --ink-2: #1E241F;
            --gold: #C4833A;
            --gold-light: #D69A57;
            --gold-dark: #9F5F24;
            --paper: #F5F2EB;
            --paper-deep: #ECE6DB;
            --text-main: #23231F;
            --text-sub: #6A675E;
            --text-invert: #FFFFFF;
            --border-line: #DED9CE;
            --border-dark: rgba(255, 255, 255, 0.12);
            --radius-lg: 8px;
            --radius-sm: 4px;
            --shadow-sm: 0 2px 10px rgba(20, 20, 20, 0.04);
            --shadow-lg: 0 18px 40px -18px rgba(15, 20, 20, 0.18);
            --font-serif: "Source Han Serif SC", "Noto Serif SC", "Songti SC", "STSong", SimSun, serif;
            --font-sans: "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: var(--font-sans);
            color: var(--text-main);
            background: #fff;
            line-height: 1.8;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            color: inherit;
            text-decoration: none;
        }

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: 1rem;
        }

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

        .skip-link {
            position: absolute;
            left: -999px;
            top: 0;
            background: var(--gold);
            color: #fff;
            padding: 8px 16px;
            z-index: 9999;
            border-radius: 0 0 8px 0;
        }

        .skip-link:focus {
            left: 0;
        }

        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            height: 48px;
            padding: 0 28px;
            border-radius: 999px;
            border: 1px solid transparent;
            font-weight: 600;
            font-size: 0.95rem;
            line-height: 1;
            cursor: pointer;
            transition: all 0.2s ease-out;
            text-align: center;
            white-space: nowrap;
        }

        .btn:focus-visible {
            outline: 2px solid var(--gold);
            outline-offset: 3px;
        }

        .btn-primary {
            background: var(--gold);
            color: #fff;
        }

        .btn-primary:hover {
            background: var(--gold-dark);
            transform: translateY(-2px);
        }

        .btn-primary:active {
            transform: translateY(0);
        }

        .btn-ghost {
            background: transparent;
            border-color: rgba(255, 255, 255, 0.45);
            color: #fff;
        }

        .btn-ghost:hover {
            border-color: var(--gold-light);
            color: var(--gold-light);
            background: rgba(255, 255, 255, 0.04);
        }

        .btn-light {
            background: #fff;
            color: var(--ink);
            border-color: #fff;
        }

        .btn-light:hover {
            background: var(--paper);
            color: var(--text-main);
            transform: translateY(-2px);
        }

        .btn-outline-dark {
            background: transparent;
            border-color: var(--border-line);
            color: var(--text-main);
        }

        .btn-outline-dark:hover {
            border-color: var(--gold);
            color: var(--gold-dark);
        }

        .btn-small {
            height: 40px;
            padding: 0 20px;
            font-size: 0.88rem;
        }

        /* Header */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 68px;
            z-index: 1000;
            background: rgba(22, 24, 23, 0.38);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid transparent;
            transition: background 0.25s ease-out, border-color 0.25s ease-out, box-shadow 0.25s ease-out;
        }

        .site-header.is-scrolled {
            background: rgba(255, 255, 255, 0.92);
            border-bottom-color: rgba(222, 217, 206, 0.72);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.05);
        }

        .header-inner {
            height: 68px;
            display: flex;
            align-items: center;
            gap: 32px;
        }

        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .brand-icon {
            width: 32px;
            height: 32px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--gold);
            color: #fff;
            border-radius: 8px;
            font-size: 14px;
        }

        .brand-name {
            font-family: var(--font-serif);
            font-size: 1.08rem;
            font-weight: 800;
            letter-spacing: 0.02em;
            color: #fff;
            white-space: nowrap;
            transition: color 0.2s ease-out;
        }

        .site-header.is-scrolled .brand-name {
            color: var(--text-main);
        }

        .header-nav {
            display: flex;
            align-items: center;
            gap: 24px;
            margin-left: 12px;
        }

        .header-nav a {
            position: relative;
            font-size: 0.92rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.86);
            padding: 10px 0;
            transition: color 0.2s ease-out;
            letter-spacing: 0.02em;
        }

        .header-nav a::after {
            content: "";
            position: absolute;
            bottom: 2px;
            left: 0;
            height: 2px;
            width: 0;
            background: var(--gold);
            border-radius: 2px;
            transition: width 0.2s ease-out;
        }

        .header-nav a:hover,
        .header-nav a.is-active {
            color: var(--gold-light);
        }

        .site-header.is-scrolled .header-nav a {
            color: var(--text-main);
        }

        .site-header.is-scrolled .header-nav a:hover,
        .site-header.is-scrolled .header-nav a.is-active {
            color: var(--gold);
        }

        .header-nav a:hover::after,
        .header-nav a.is-active::after {
            width: 100%;
        }

        .header-actions {
            margin-left: auto;
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .header-search {
            display: flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.12);
            border: 1px solid var(--border-dark);
            height: 38px;
            padding: 0 14px;
            border-radius: 999px;
            width: 180px;
            transition: width 0.2s ease-out, background 0.2s ease-out;
        }

        .header-search i {
            color: rgba(255, 255, 255, 0.7);
            font-size: 13px;
        }

        .header-search input {
            border: 0;
            background: transparent;
            outline: none;
            color: #fff;
            font-size: 0.85rem;
            width: 100%;
        }

        .header-search input::placeholder {
            color: rgba(255, 255, 255, 0.6);
        }

        .site-header.is-scrolled .header-search {
            background: var(--paper);
            border-color: var(--border-line);
        }

        .site-header.is-scrolled .header-search i {
            color: var(--text-sub);
        }

        .site-header.is-scrolled .header-search input {
            color: var(--text-main);
        }

        .site-header.is-scrolled .header-search input::placeholder {
            color: var(--text-sub);
        }

        .header-search:focus-within {
            border-color: var(--gold);
            width: 220px;
        }

        .header-login {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.86);
            padding: 6px 2px;
            border-bottom: 1px solid transparent;
            transition: color 0.2s ease-out, border-color 0.2s ease-out;
        }

        .site-header.is-scrolled .header-login {
            color: var(--text-main);
        }

        .header-login:hover {
            color: var(--gold-light);
            border-bottom-color: var(--gold-light);
        }

        .header-cta {
            background: var(--gold);
            color: #fff;
            height: 38px;
            padding: 0 18px;
            border-radius: 999px;
            font-size: 0.86rem;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            border: none;
            cursor: pointer;
            transition: background 0.2s ease-out;
        }

        .header-cta:hover {
            background: var(--gold-dark);
            color: #fff;
        }

        .nav-toggle {
            display: none;
            background: transparent;
            border: 0;
            color: #fff;
            font-size: 22px;
            cursor: pointer;
            width: 40px;
            height: 40px;
            border-radius: 8px;
            align-items: center;
            justify-content: center;
        }

        .site-header.is-scrolled .nav-toggle {
            color: var(--text-main);
        }

        .nav-toggle:focus-visible {
            outline: 2px solid var(--gold);
            outline-offset: 2px;
        }

        /* Mobile menu */
        .mobile-menu {
            position: fixed;
            inset: 0;
            z-index: 1200;
            background: var(--ink-2);
            color: #fff;
            display: flex;
            flex-direction: column;
            justify-content: center;
            padding: 48px;
            opacity: 0;
            visibility: hidden;
            transition: opacity 0.25s ease-out, visibility 0.25s ease-out;
        }

        .mobile-menu.is-open {
            opacity: 1;
            visibility: visible;
        }

        .mobile-menu-close {
            position: absolute;
            top: 22px;
            right: 24px;
            width: 44px;
            height: 44px;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid var(--border-dark);
            color: #fff;
            border-radius: 50%;
            font-size: 1.1rem;
            cursor: pointer;
        }

        .mobile-menu a {
            display: block;
            font-family: var(--font-serif);
            font-size: 2rem;
            font-weight: 700;
            color: #fff;
            padding: 12px 0;
            border-bottom: 1px solid var(--border-dark);
            transition: color 0.2s ease-out, padding-left 0.2s ease-out;
        }

        .mobile-menu a:hover,
        .mobile-menu a.is-active {
            color: var(--gold-light);
            padding-left: 8px;
        }

        /* Category hero */
        .category-hero {
            position: relative;
            background: var(--ink) url("/assets/images/backpic/back-2.png") center / cover no-repeat;
            color: #fff;
            overflow: hidden;
            padding: 168px 0 108px;
        }

        .category-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: rgba(22, 24, 23, 0.72);
        }

        .category-hero::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(22, 24, 23, 0.45) 0%, rgba(22, 24, 23, 0) 70%);
        }

        .category-hero-content {
            position: relative;
            z-index: 2;
        }

        .category-hero .hero-kicker {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 0.9rem;
            letter-spacing: 0.08em;
            color: var(--gold-light);
            text-transform: uppercase;
            margin-bottom: 18px;
            border-left: 3px solid var(--gold);
            padding-left: 14px;
        }

        .category-hero h1 {
            font-family: var(--font-serif);
            font-size: clamp(3rem, 7vw, 5.2rem);
            line-height: 1.12;
            font-weight: 800;
            margin: 0 0 24px;
            letter-spacing: 0.04em;
            color: #fff;
        }

        .category-hero .hero-lead {
            max-width: 720px;
            font-size: 1.12rem;
            line-height: 2;
            color: rgba(255, 255, 255, 0.88);
            margin: 0 0 32px;
        }

        .hero-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 14px;
            margin-bottom: 32px;
        }

        .badge-count {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            background: rgba(196, 131, 58, 0.16);
            border: 1px solid rgba(214, 154, 87, 0.45);
            color: #F2D8B4;
            font-size: 0.85rem;
            border-radius: 999px;
            letter-spacing: 0.03em;
        }

        .hero-meta-text {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.86rem;
            color: rgba(255, 255, 255, 0.72);
        }

        .hero-meta-text i {
            color: var(--gold-light);
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }

        /* Section base */
        .section {
            padding: 96px 0;
        }

        .section-paper {
            background: var(--paper);
        }

        .section-white {
            background: #fff;
        }

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

        .section-head {
            max-width: 820px;
            margin-bottom: 56px;
        }

        .section-head.center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--gold);
            letter-spacing: 0.08em;
            font-weight: 600;
            margin-bottom: 14px;
        }

        .section-tag::before {
            content: "";
            width: 24px;
            height: 2px;
            background: var(--gold);
        }

        .section-head.center .section-tag::after {
            content: "";
            width: 24px;
            height: 2px;
            background: var(--gold);
        }

        h2 {
            font-family: var(--font-serif);
            font-size: clamp(1.9rem, 3.8vw, 2.85rem);
            line-height: 1.35;
            font-weight: 700;
            margin: 0 0 16px;
            color: var(--text-main);
            letter-spacing: 0.01em;
        }

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

        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-sub);
            margin: 0;
            line-height: 1.9;
        }

        /* TOC */
        .toc-section {
            background: var(--paper);
            padding: 52px 0;
            border-bottom: 1px solid var(--border-line);
        }

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

        .toc-item {
            display: flex;
            align-items: center;
            gap: 18px;
            background: #fff;
            border: 1px solid transparent;
            border-radius: var(--radius-lg);
            padding: 22px 24px;
            box-shadow: var(--shadow-sm);
            transition: transform 0.2s ease-out, box-shadow 0.2s ease-out, border-color 0.2s ease-out;
        }

        .toc-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(196, 131, 58, 0.25);
        }

        .toc-index {
            font-family: var(--font-serif);
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--gold);
            line-height: 1;
            min-width: 64px;
        }

        .toc-body strong {
            display: block;
            font-size: 1.06rem;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 4px;
        }

        .toc-body span {
            font-size: 0.86rem;
            color: var(--text-sub);
            line-height: 1.5;
        }

        /* Feature overview */
        .feature-grid {
            display: grid;
            grid-template-columns: 1.05fr 0.95fr;
            align-items: center;
            gap: 56px;
        }

        .feature-media {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            position: relative;
            aspect-ratio: 4/5;
        }

        .feature-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.3s ease-out;
        }

        .feature-media:hover img {
            transform: scale(1.03);
        }

        .feature-media-tag {
            position: absolute;
            left: 18px;
            top: 18px;
            background: rgba(22, 24, 23, 0.82);
            color: #F2D8B4;
            border: 1px solid rgba(214, 154, 87, 0.4);
            font-size: 0.78rem;
            padding: 5px 14px;
            border-radius: 999px;
            backdrop-filter: blur(8px);
        }

        .feature-content h2 {
            margin-bottom: 18px;
        }

        .feature-content p {
            font-size: 1rem;
            line-height: 2;
            color: var(--text-sub);
            margin-bottom: 22px;
        }

        .feature-list {
            margin: 0 0 28px;
            padding: 0;
            list-style: none;
            display: grid;
            gap: 14px;
        }

        .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            color: var(--text-main);
            font-weight: 500;
        }

        .feature-list li i {
            color: var(--gold);
            margin-top: 7px;
            font-size: 0.8rem;
        }

        /* Topic cards */
        .topics-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .topic-card {
            background: #fff;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-line);
            transition: transform 0.2s ease-out, box-shadow 0.2s ease-out;
            display: flex;
            flex-direction: column;
        }

        .topic-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }

        .topic-media {
            aspect-ratio: 1/1;
            overflow: hidden;
            position: relative;
        }

        .topic-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.3s ease-out;
        }

        .topic-card:hover .topic-media img {
            transform: scale(1.04);
        }

        .topic-media .media-label {
            position: absolute;
            right: 12px;
            bottom: 12px;
            background: rgba(22, 24, 23, 0.78);
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: #fff;
            padding: 4px 12px;
            border-radius: 999px;
            font-size: 0.76rem;
            letter-spacing: 0.05em;
        }

        .topic-body {
            padding: 24px 24px 28px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .topic-body .topic-num {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-family: var(--font-serif);
            font-size: 0.92rem;
            color: var(--gold);
            font-weight: 700;
            margin-bottom: 12px;
            letter-spacing: 0.04em;
        }

        .topic-body h3 {
            font-family: var(--font-serif);
            font-size: 1.4rem;
            margin: 0 0 10px;
            font-weight: 700;
            line-height: 1.45;
            color: var(--text-main);
        }

        .topic-body p {
            font-size: 0.94rem;
            color: var(--text-sub);
            line-height: 1.85;
            margin: 0;
            flex: 1;
        }

        .topic-tags {
            margin-top: 18px;
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            border-top: 1px solid var(--border-line);
            padding-top: 16px;
        }

        .topic-tags span {
            background: var(--paper);
            color: var(--text-sub);
            border-radius: 999px;
            padding: 4px 12px;
            font-size: 0.78rem;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .topic-tags span i {
            color: var(--gold);
            font-size: 0.7rem;
        }

        .topics-cta {
            margin-top: 48px;
            text-align: center;
        }

        /* Value section */
        .value-grid {
            display: grid;
            grid-template-columns: 0.8fr 1.2fr;
            gap: 40px;
            align-items: stretch;
        }

        .value-side {
            background: var(--ink-2);
            color: #fff;
            border-radius: var(--radius-lg);
            padding: 36px 36px 38px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            overflow: hidden;
            position: relative;
        }

        .value-side::after {
            content: "深读";
            position: absolute;
            right: -18px;
            bottom: -28px;
            font-family: var(--font-serif);
            font-size: 7rem;
            font-weight: 800;
            color: rgba(255, 255, 255, 0.04);
            line-height: 1;
            pointer-events: none;
        }

        .value-side h2 {
            color: #fff;
            font-size: 2rem;
            line-height: 1.35;
        }

        .value-side p {
            color: rgba(255, 255, 255, 0.72);
            margin: 20px 0 0;
            font-size: 0.98rem;
        }

        .value-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 18px;
        }

        .value-item {
            background: #fff;
            border: 1px solid var(--border-line);
            border-radius: var(--radius-lg);
            padding: 26px 22px;
            display: flex;
            flex-direction: column;
            gap: 8px;
            box-shadow: var(--shadow-sm);
            transition: transform 0.22s ease-out, box-shadow 0.22s ease-out;
        }

        .value-item:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
        }

        .value-item i {
            color: var(--gold);
            font-size: 1.5rem;
            margin-bottom: 4px;
        }

        .value-item strong {
            font-family: var(--font-serif);
            font-size: 1.08rem;
            color: var(--text-main);
            font-weight: 700;
        }

        .value-item span {
            font-size: 0.9rem;
            color: var(--text-sub);
            line-height: 1.75;
        }

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

        .audience-card {
            background: var(--paper);
            border-radius: var(--radius-lg);
            padding: 34px 30px;
            border: 1px solid transparent;
            transition: all 0.2s ease-out;
        }

        .audience-card:hover {
            background: #fff;
            border-color: var(--border-line);
            box-shadow: var(--shadow-lg);
            transform: translateY(-5px);
        }

        .audience-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: var(--ink);
            color: var(--gold-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            margin-bottom: 20px;
        }

        .audience-card h3 {
            font-family: var(--font-serif);
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text-main);
            margin: 0 0 10px;
        }

        .audience-card p {
            font-size: 0.94rem;
            color: var(--text-sub);
            line-height: 1.9;
            margin: 0;
        }

        /* Process timeline */
        .method-wrapper {
            border-radius: var(--radius-lg);
            background: var(--ink-2);
            padding: 60px;
            color: #fff;
            overflow: hidden;
        }

        .method-step {
            display: grid;
            grid-template-columns: 80px 1fr;
            gap: 30px;
            padding: 28px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            position: relative;
        }

        .method-step:last-child {
            border-bottom: 0;
        }

        .step-number {
            font-family: var(--font-serif);
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1;
            color: var(--gold);
            padding-top: 4px;
        }

        .step-content strong {
            display: block;
            font-family: var(--font-serif);
            font-size: 1.35rem;
            color: #fff;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .step-content span {
            display: block;
            font-size: 0.94rem;
            color: rgba(255, 255, 255, 0.68);
            max-width: 900px;
            line-height: 1.9;
        }

        /* Feature banner */
        .dark-banner {
            background: var(--ink) url("/assets/images/backpic/back-1.webp") center / cover no-repeat;
            border-radius: var(--radius-lg);
            color: #fff;
            padding: 64px 56px;
            display: grid;
            grid-template-columns: 1fr 360px;
            gap: 40px;
            align-items: center;
            position: relative;
            overflow: hidden;
        }

        .dark-banner::before {
            content: "";
            position: absolute;
            inset: 0;
            background: rgba(22, 24, 23, 0.56);
        }

        .dark-banner > * {
            position: relative;
            z-index: 1;
        }

        .dark-banner h2 {
            color: #fff;
            font-size: clamp(1.8rem, 3vw, 2.5rem);
            margin-bottom: 10px;
        }

        .dark-banner p {
            color: rgba(255, 255, 255, 0.82);
            margin: 0;
        }

        .dark-banner-actions {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 12px;
        }

        /* FAQ */
        .faq-shell {
            max-width: 860px;
            margin: 0 auto;
        }

        .faq-item {
            border: 1px solid var(--border-line);
            background: #fff;
            border-radius: var(--radius-lg);
            margin-bottom: 16px;
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: box-shadow 0.2s ease-out;
        }

        .faq-item.is-open {
            box-shadow: var(--shadow-lg);
        }

        .faq-question {
            width: 100%;
            background: transparent;
            border: 0;
            text-align: left;
            padding: 22px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-main);
            cursor: pointer;
            line-height: 1.5;
            transition: color 0.2s ease-out;
        }

        .faq-question:hover {
            color: var(--gold);
        }

        .faq-question i {
            flex-shrink: 0;
            color: var(--gold);
            transition: transform 0.25s ease-out;
        }

        .faq-item.is-open .faq-question i {
            transform: rotate(45deg);
        }

        .faq-answer {
            padding: 0 24px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
        }

        .faq-answer-inner {
            padding-bottom: 24px;
            color: var(--text-sub);
            font-size: 0.95rem;
            line-height: 1.9;
            border-top: 1px solid var(--border-line);
            padding-top: 18px;
        }

        /* CTA */
        .cta-section {
            padding: 90px 0 100px;
            background: var(--paper);
        }

        .cta-card {
            background: #fff;
            border: 1px solid rgba(196, 131, 58, 0.3);
            border-radius: var(--radius-lg);
            padding: 64px 48px;
            text-align: center;
            box-shadow: var(--shadow-lg);
            position: relative;
            overflow: hidden;
        }

        .cta-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--gold), var(--gold-light), var(--gold));
        }

        .cta-card h2 {
            font-size: clamp(2rem, 4vw, 3rem);
            margin-bottom: 16px;
        }

        .cta-card > p {
            color: var(--text-sub);
            max-width: 660px;
            margin: 0 auto 34px;
            font-size: 1.02rem;
        }

        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 14px;
        }

        .btn-share {
            background: transparent;
            border: 1px solid var(--gold);
            color: var(--gold-dark);
            height: 48px;
            padding: 0 28px;
            border-radius: 999px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.2s ease-out;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-share:hover {
            background: rgba(196, 131, 58, 0.1);
            transform: translateY(-2px);
        }

        /* Footer */
        .site-footer {
            background: var(--ink-2);
            color: rgba(255, 255, 255, 0.62);
            padding: 64px 0 30px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 0.7fr 0.9fr;
            gap: 48px;
            padding-bottom: 50px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 18px;
        }

        .footer-brand .brand-icon {
            width: 36px;
            height: 36px;
            border-radius: 9px;
        }

        .footer-brand .brand-name {
            font-family: var(--font-serif);
            font-size: 1.2rem;
            font-weight: 800;
            color: #fff;
        }

        .footer-about {
            font-size: 0.9rem;
            line-height: 1.9;
            max-width: 380px;
            margin: 0;
        }

        .footer-title {
            font-family: var(--font-serif);
            font-size: 1rem;
            color: #fff;
            font-weight: 700;
            margin-bottom: 18px;
        }

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

        .footer-links a {
            color: rgba(255, 255, 255, 0.62);
            font-size: 0.92rem;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            width: fit-content;
            transition: color 0.2s ease-out, transform 0.2s ease-out;
        }

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

        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 12px;
            padding-top: 26px;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.4);
        }

        @media screen and (max-width: 1024px) {
            .header-inner {
                gap: 16px;
            }

            .header-nav {
                gap: 16px;
                margin-left: 0;
            }

            .header-nav a {
                font-size: 0.86rem;
            }

            .header-search {
                width: 148px;
            }

            .feature-grid {
                gap: 36px;
            }

            .topics-grid {
                gap: 20px;
            }

            .dark-banner {
                grid-template-columns: 1fr;
            }

            .dark-banner-actions {
                flex-direction: row;
                flex-wrap: wrap;
                justify-content: flex-start;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 36px;
            }

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

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

            .header-inner {
                height: 64px;
                gap: 0;
            }

            .brand-name {
                font-size: 1rem;
            }

            .header-nav,
            .header-search,
            .header-login,
            .header-cta {
                display: none;
            }

            .nav-toggle {
                display: inline-flex;
                margin-left: auto;
            }

            .header-actions {
                gap: 4px;
            }

            .category-hero {
                padding: 138px 0 72px;
            }

            .category-hero h1 {
                font-size: 3.4rem;
            }

            .section {
                padding: 64px 0;
            }

            .section-head {
                margin-bottom: 38px;
            }

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

            .toc-item {
                padding: 18px 20px;
            }

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

            .feature-media {
                aspect-ratio: 4/3;
                max-height: 420px;
            }

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

            .value-list {
                grid-template-columns: 1fr;
            }

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

            .method-wrapper {
                padding: 36px 24px;
            }

            .method-step {
                grid-template-columns: 52px 1fr;
                gap: 20px;
            }

            .step-number {
                font-size: 2rem;
            }

            .dark-banner {
                padding: 40px 28px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }

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

            .cta-card {
                padding: 48px 24px;
            }
        }

        @media screen and (max-width: 520px) {
            .container-main {
                padding: 0 18px;
            }

            .brand-icon {
                width: 30px;
                height: 30px;
                font-size: 12px;
                border-radius: 7px;
            }

            .category-hero {
                padding: 122px 0 56px;
            }

            .category-hero h1 {
                font-size: 2.7rem;
            }

            .category-hero .hero-lead {
                font-size: 1rem;
                line-height: 1.9;
            }

            .category-hero .hero-kicker {
                font-size: 0.8rem;
            }

            .btn,
            .btn-share {
                width: 100%;
                height: 46px;
            }

            .hero-actions {
                flex-direction: column;
            }

            .feature-media {
                aspect-ratio: 4/3;
                max-height: 320px;
            }

            .topics-cta .btn {
                width: 100%;
            }

            .value-side {
                padding: 28px 20px;
            }

            .method-step {
                grid-template-columns: 1fr;
                gap: 6px;
            }

            .step-content span {
                font-size: 0.9rem;
            }

            .cta-card {
                padding: 40px 16px;
            }

            .cta-actions {
                flex-direction: column;
            }

            .footer-links a {
                padding: 2px 0;
            }
        }