/* roulang page: index */
:root {
        --bg-warm: #F7F5F0;
        --surface-white: #FFFFFF;
        --ink-main: #1B1A17;
        --text-secondary: #6F6A61;
        --border-mist: #E7E1D8;
        --cta-dark: #1B1A17;
        --accent-red: #A52A2A;
        --bronze: #9A7A58;
        --max-w: 1320px;
        --radius: 4px;
        --transition: 300ms ease;
        --font-head: "Noto Serif SC", "Source Han Serif SC", "Songti SC", SimSun, serif;
        --font-body: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, sans-serif;
    }
    *, *::before, *::after {
        box-sizing: border-box;
        margin: 0;
        padding: 0;
    }
    html {
        scroll-behavior: smooth;
        scroll-padding-top: 100px;
    }
    body {
        font-family: var(--font-body);
        background: var(--bg-warm);
        color: var(--ink-main);
        font-size: 16px;
        line-height: 1.75;
        -webkit-font-smoothing: antialiased;
        overflow-x: hidden;
    }
    img { max-width: 100%; height: auto; display: block; }
    a { color: inherit; text-decoration: none; transition: color var(--transition); }
    ul, ol { list-style: none; }
    .container-custom {
        max-width: var(--max-w);
        margin: 0 auto;
        padding: 0 24px;
        position: relative;
        z-index: 1;
    }
    .text-white { color: #fff; }
    .text-secondary { color: var(--text-secondary); }
    .section-pad {
        padding: 100px 0;
    }
    .section-topline {
        display: flex;
        align-items: center;
        gap: 16px;
        margin-bottom: 16px;
    }
    .section-topline .line {
        display: inline-block;
        width: 32px;
        height: 1px;
        background: var(--bronze);
    }
    .section-topline .label {
        font-size: 14px;
        letter-spacing: 0.12em;
        color: var(--accent-red);
        text-transform: uppercase;
    }
    .section-title {
        font-family: var(--font-head);
        font-size: 40px;
        line-height: 1.2;
        font-weight: 600;
        letter-spacing: 0.02em;
        margin-bottom: 20px;
        color: var(--ink-main);
    }
    .section-sub {
        font-size: 17px;
        color: var(--text-secondary);
        line-height: 1.9;
        max-width: 640px;
    }
    @media (max-width: 768px) {
        .section-pad { padding: 60px 0; }
        .section-title { font-size: 30px; }
        .container-custom { padding: 0 20px; }
    }

    header .floating-header {
        position: fixed;
        top: 0; left: 0; right: 0;
        height: 80px;
        background: rgba(247, 245, 240, .85);
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
        border-bottom: 1px solid transparent;
        z-index: 1000;
        transition: background var(--transition), border-color var(--transition), box-shadow var(--transition);
        display: flex;
        align-items: center;
    }
    header.scrolled .floating-header {
        background: rgba(255, 255, 255, .9);
        border-bottom-color: var(--border-mist);
        box-shadow: 0 4px 20px rgba(27, 26, 23, .04);
    }
    .header-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        width: 100%;
    }
    .site-logo {
        display: inline-flex;
        align-items: baseline;
        gap: 2px;
        font-family: var(--font-head);
        font-size: 26px;
        font-weight: 700;
        line-height: 1;
        color: var(--ink-main);
        letter-spacing: 0em;
    }
    .site-logo .logo-en {
        font-family: "Helvetica Neue", "Inter", sans-serif;
        font-weight: 700;
    }
    .site-logo .logo-cn {
        font-family: var(--font-head);
        font-weight: 700;
        margin-left: 1px;
    }
    .header-nav {
        display: flex;
        align-items: center;
        gap: 36px;
    }
    .header-nav .nav-links {
        display: flex;
        align-items: center;
        gap: 30px;
    }
    .header-nav .nav-links a {
        font-size: 15px;
        font-weight: 500;
        color: var(--ink-main);
        position: relative;
        padding: 6px 0;
        transition: color var(--transition);
    }
    .header-nav .nav-links a::after {
        content: "";
        position: absolute;
        bottom: 0;
        left: 0;
        width: 0;
        height: 2px;
        background: var(--accent-red);
        transition: width var(--transition);
    }
    .header-nav .nav-links a.active {
        color: var(--accent-red);
    }
    .header-nav .nav-links a.active::after {
        width: 100%;
    }
    .header-nav .nav-links a:hover {
        color: var(--accent-red);
    }
    .header-nav .nav-links a:hover::after {
        width: 100%;
    }
    .header-cta-group {
        display: flex;
        align-items: center;
        gap: 12px;
    }
    .btn-prime {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        background: var(--cta-dark);
        color: #fff;
        border: 1px solid var(--cta-dark);
        font-size: 15px;
        font-weight: 500;
        font-family: var(--font-body);
        padding: 10px 24px;
        height: 48px;
        border-radius: var(--radius);
        cursor: pointer;
        transition: all var(--transition);
        letter-spacing: .05em;
        gap: 6px;
    }
    .btn-prime:hover {
        background: var(--accent-red);
        border-color: var(--accent-red);
        color: #fff;
    }
    .btn-prime:focus-visible {
        outline: 2px solid var(--accent-red);
        outline-offset: 2px;
    }
    .btn-ghost {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        background: transparent;
        color: var(--ink-main);
        border: 1px solid var(--ink-main);
        font-size: 15px;
        font-weight: 500;
        font-family: var(--font-body);
        height: 48px;
        padding: 10px 24px;
        border-radius: var(--radius);
        cursor: pointer;
        transition: all var(--transition);
        gap: 8px;
    }
    .btn-ghost:hover {
        border-color: var(--accent-red);
        color: var(--accent-red);
        transform: translateY(-2px);
    }
    .btn-ghost:hover i { transform: translateX(4px); }
    .btn-ghost i { transition: transform var(--transition); }
    .btn-ghost:focus-visible {
        outline: 2px solid var(--accent-red);
        outline-offset: 2px;
    }
    .btn-chat {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        background: transparent;
        border: 1px solid var(--border-mist);
        color: var(--ink-main);
        height: 42px;
        padding: 8px 18px;
        border-radius: var(--radius);
        font-size: 14px;
        font-family: var(--font-body);
        cursor: pointer;
        transition: all var(--transition);
    }
    .btn-chat:hover {
        border-color: var(--accent-red);
        color: var(--accent-red);
    }
    .header-cta { text-align: center; }
    .menu-toggle {
        display: none;
        font-size: 32px;
        background: none;
        border: none;
        cursor: pointer;
        color: var(--ink-main);
        line-height: 1;
        padding: 8px;
    }
    .mobile-close {
        display: none;
        font-size: 40px;
        line-height: 1;
        cursor: pointer;
        padding: 8px;
        position: absolute;
        top: 12px;
        right: 20px;
        background: none;
        border: none;
        color: var(--ink-main);
        z-index: 1002;
    }
    @media (max-width: 1024px) {
        .header-nav .nav-links {
            display: none;
        }
        .menu-toggle {
            display: block;
        }
        .header-mobile-menu {
            display: none;
            position: fixed;
            top: 0; left: 0; right: 0; bottom: 0;
            background: rgba(247, 245, 240, .98);
            backdrop-filter: blur(20px);
            z-index: 1001;
            flex-direction: column;
            justify-content: center;
            align-items: center;
        }
        .header-mobile-menu.open {
            display: flex;
        }
        .header-mobile-menu a {
            font-size: 24px;
            font-family: var(--font-head);
            padding: 8px 16px;
            color: var(--ink-main);
            transition: color var(--transition);
        }
        .header-mobile-menu a:hover { color: var(--accent-red); }
        .mobile-close.show { display: block; }
    }
    @media (max-width: 640px) {
        header .floating-header { height: 64px; }
        .site-logo { font-size: 22px; }
        .header-cta-btn { display: none; }
        .btn-ghost, .btn-prime { font-size: 14px; padding: 8px 18px; height: 44px; }
        .header-nav { gap: 12px; }
    }

    /* Hero */
    .hero-container {
        position: relative;
        min-height: 100vh;
        display: flex;
        align-items: center;
        padding: 140px 0 100px 0;
        background: url('/assets/images/backpic/back-1.webp') no-repeat center center;
        background-size: cover;
        background-attachment: fixed;
        isolation: isolate;
    }
    .hero-container::before {
        content: "";
        position: absolute;
        inset: 0;
        background: linear-gradient(180deg, rgba(247,245,240,0.93) 0%, rgba(247,245,240,0.80) 45%, rgba(247,245,240,0.92) 100%);
        z-index: -1;
    }
    .hero-inner {
        width: 100%;
    }
    .hero-grid {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 40px;
    }
    .hero-main-copy { flex-basis: 56%; }
    .hero-visual { flex-basis: 40%; }
    .hero-eyebrow {
        display: inline-flex;
        align-items: center;
        gap: 10px;
        font-family: var(--font-body);
        font-size: 14px;
        color: var(--accent-red);
        margin-bottom: 20px;
        letter-spacing: .08em;
    }
    .hero-eyebrow::before {
        content: "";
        width: 40px; height: 1px;
        background: var(--accent-red);
        display: inline-block;
    }
    h1.hero-title {
        font-family: var(--font-head);
        font-size: 64px;
        line-height: 1.12;
        font-weight: 600;
        letter-spacing: .03em;
        color: var(--ink-main);
        margin-bottom: 28px;
        max-width: 14em;
        text-wrap: balance;
    }
    .hero-title .brand-name {
        color: var(--ink-main);
        border-bottom: 3px solid var(--accent-red);
        display: inline-block;
        padding-bottom: 2px;
    }
    .hero-subtitle {
        font-size: 18px;
        line-height: 1.9;
        color: var(--text-secondary);
        max-width: 540px;
        margin-bottom: 40px;
    }
    .hero-ctas {
        display: flex;
        align-items: center;
        gap: 16px;
        flex-wrap: wrap;
    }
    .hero-trustline {
        margin-top: 36px;
        display: flex;
        gap: 40px;
        align-items: center;
        flex-wrap: wrap;
    }
    .hero-trustline .trust {
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: 14px;
        color: var(--text-secondary);
    }
    .trust i { color: var(--accent-red); font-size: 16px; }
    .hero-visual .visual-box {
        position: relative;
    }
    .visual-box .main-shot {
        border-radius: 6px;
        overflow: hidden;
        box-shadow: 0 24px 60px rgba(27, 26, 23, .12);
    }
    .visual-box .helper-card {
        position: absolute;
        bottom: -24px;
        left: -28px;
        background: var(--surface-white);
        border: 1px solid var(--border-mist);
        padding: 12px 18px;
        border-radius: var(--radius);
        box-shadow: 0 8px 30px rgba(27,26,23,.08);
        display: flex;
        align-items: center;
        gap: 10px;
    }
    .helper-card i { color: var(--accent-red); font-size: 20px; }
    .helper-card .helper-num { font-family: var(--font-head); font-size: 22px; font-weight: 600; }
    .helper-card .helper-label { font-size: 13px; color: var(--text-secondary); line-height: 1.4; }
    .scroll-down {
        position: absolute;
        bottom: 28px;
        left: 50%;
        transform: translateX(-50%);
        display: flex;
        align-items: center;
        gap: 8px;
        color: var(--text-secondary);
        font-size: 13px;
        letter-spacing: 0.08em;
        text-transform: uppercase;
    }
    .scroll-down .mouse-icon {
        width: 22px;
        height: 34px;
        border: 1px solid var(--text-secondary);
        border-radius: 14px;
        position: relative;
        display: inline-block;
    }
    .scroll-down .mouse-icon::after {
        content: "";
        position: absolute;
        top: 6px;
        left: 50%;
        transform: translateX(-50%);
        width: 2px; height: 5px;
        background: var(--accent-red);
        border-radius: 2px;
        animation: scrollDot 2s infinite;
    }
    @keyframes scrollDot {
        0% { opacity: 1; transform: translate(-50%, 0); }
        80% { opacity: 0; transform: translate(-50%, 12px); }
        100% { opacity: 0; }
    }
    @media (max-width: 1024px) {
        .hero-grid { flex-direction: column; }
        .hero-main-copy, .hero-visual { flex-basis: 100%; }
        .hero-container { background-attachment: scroll; }
    }
    @media (max-width: 768px) {
        .hero-container { padding: 120px 0 80px 0; min-height: auto; }
        h1.hero-title { font-size: 36px; }
        .hero-subtitle { font-size: 16px; }
        .hero-ctas { flex-direction: column; align-items: flex-start; width: 100%; }
        .hero-ctas a { width: 100%; }
        .visual-box .helper-card { left: 8px; }
        .scroll-down { display: none; }
    }

    /* Points */
    #points {
        background: var(--surface-white);
        border-bottom: 1px solid var(--border-mist);
    }
    .points-grid {
        display: grid;
        grid-template-columns: 36% 64%;
        gap: 56px;
        align-items: start;
    }
    .points-left {
        position: sticky;
        top: 120px;
    }
    .points-list {
        display: flex;
        flex-direction: column;
    }
    .point-item {
        display: flex;
        align-items: baseline;
        padding: 36px 0;
        border-bottom: 1px solid var(--border-mist);
        gap: 28px;
        transition: background var(--transition);
    }
    .point-item:first-child { border-top: 1px solid var(--border-mist); }
    .point-item .point-num {
        font-family: var(--font-head);
        font-size: 42px;
        font-weight: 600;
        line-height: 1;
        color: var(--border-mist);
        min-width: 70px;
        letter-spacing: -.01em;
        transition: color var(--transition), transform var(--transition);
    }
    .point-item:hover .point-num {
        color: var(--accent-red);
        transform: translateX(6px);
    }
    .point-item .point-content h3 {
        font-family: var(--font-head);
        font-size: 20px;
        font-weight: 600;
        margin-bottom: 8px;
    }
    .point-item .point-content p {
        font-size: 15px;
        color: var(--text-secondary);
        line-height: 1.7;
        max-width: 480px;
        margin-bottom: 0;
    }
    @media (max-width: 1024px) {
        .points-grid { grid-template-columns: 1fr; }
        .points-left { position: static; }
    }

    /* Demo */
    #demo {
        background: var(--bg-warm);
    }
    .demo-section {
        display: flex;
        align-items: center;
        gap: 80px;
        margin-bottom: 80px;
    }
    .demo-section:last-child { margin-bottom: 0; }
    .demo-visual { flex-basis: 58%; }
    .demo-content { flex-basis: 42%; }
    .demo-visual img {
        border-radius: 6px;
        box-shadow: 0 16px 40px rgba(27, 26, 23, .08);
        transform: scale(1);
        transition: transform 700ms ease;
    }
    .demo-visual:hover img {
        transform: scale(1.015);
    }
    .demo-content .step {
        display: flex;
        gap: 16px;
        padding: 22px 0;
        border-bottom: 1px solid var(--border-mist);
    }
    .demo-content .step:first-of-type { border-top: 1px solid var(--border-mist); }
    .demo-content .step-num {
        font-size: 13px;
        font-weight: 600;
        color: var(--accent-red);
    }
    .demo-content .step h4 {
        font-family: var(--font-head);
        font-size: 18px;
        font-weight: 600;
        margin-bottom: 6px;
    }
    .demo-content .step p { font-size: 15px; color: var(--text-secondary); margin-bottom: 0; }
    @media (max-width: 1024px) {
        .demo-section { flex-direction: column; gap: 36px; }
        .demo-visual, .demo-content { flex-basis: auto; width: 100%; }
        .demo-section.flip { flex-direction: column; }
    }

    /* Proof */
    #proof {
        background: var(--bg-warm);
        padding-top: 0;
    }
    .proof-quote {
        border-left: 1px solid var(--bronze);
        padding-left: 32px;
        font-family: var(--font-head);
        font-size: 20px;
        line-height: 1.8;
        color: var(--ink-main);
        margin-bottom: 64px;
    }
    .proof-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 60px;
        align-items: center;
    }
    .proof-metrics {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 40px;
    }
    .metric-number {
        font-family: "Helvetica Neue", "Inter", var(--font-body);
        font-size: 64px;
        font-weight: 300;
        line-height: 1;
        color: var(--ink-main);
        margin-bottom: 8px;
        letter-spacing: -.02em;
    }
    .metric-number .num-unit { font-size: 30px; }
    .metric-label { font-size: 14px; color: var(--text-secondary); }
    .proof-copy {
        border-left: 1px solid var(--border-mist);
        padding-left: 40px;
    }
    .proof-copy p { font-size: 17px; line-height: 2; color: var(--text-secondary); }
    @media (max-width: 768px) {
        .proof-grid { grid-template-columns: 1fr; gap: 32px; }
        .proof-metrics { gap: 24px; }
        .metric-number { font-size: 40px; }
        .proof-copy { border-left: none; border-top: 1px solid var(--border-mist); padding-left: 0; padding-top: 24px; }
    }

    /* News */
    #news {
        background: var(--bg-warm);
    }
    .news-header-row {
        display: flex;
        justify-content: space-between;
        align-items: flex-end;
        margin-bottom: 48px;
        gap: 24px;
    }
    .all-news-link {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        font-size: 14px;
        color: var(--text-secondary);
        border-bottom: 1px solid var(--text-secondary);
        padding-bottom: 4px;
        transition: all var(--transition);
    }
    .all-news-link:hover { color: var(--accent-red); border-color: var(--accent-red); }
    .news-list {
        border-top: 1px solid var(--border-mist);
    }
    .news-row {
        display: flex;
        align-items: center;
        gap: 36px;
        padding: 28px 8px;
        border-bottom: 1px solid var(--border-mist);
        transition: background var(--transition);
        width: 100%;
    }
    .news-row:hover { background: var(--surface-white); cursor: pointer; }
    .news-date {
        min-width: 100px;
        font-family: "Helvetica Neue";
        font-size: 18px;
        color: var(--text-secondary);
        text-align: left;
    }
    .news-inner {
        flex: 1;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 28px;
    }
    .news-title {
        font-family: var(--font-head);
        font-size: 18px;
        font-weight: 600;
        margin-bottom: 6px;
        transition: color var(--transition);
    }
    .news-row:hover .news-title { color: var(--accent-red); }
    .news-excerpt {
        font-size: 15px;
        color: var(--text-secondary);
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
        max-width: 600px;
    }
    .news-category {
        display: inline-block;
        background: transparent;
        border: 1px solid var(--bronze);
        color: var(--bronze);
        padding: 4px 12px;
        font-size: 13px;
        border-radius: 100px;
        line-height: 1.4;
        white-space: nowrap;
    }
    .news-arrow {
        color: var(--text-secondary);
        font-size: 18px;
        transition: all var(--transition);
    }
    .news-row:hover .news-arrow { color: var(--accent-red); transform: translateX(4px); }
    @media (max-width: 768px) {
        .news-row { flex-direction: column; gap: 8px; align-items: flex-start; padding: 24px 0; }
        .news-inner { flex-direction: column; align-items: flex-start; gap: 10px; width: 100%; }
        .news-date { min-width: auto; font-size: 14px; color: var(--accent-red); }
        .news-excerpt { max-width: 100%; }
        .news-category { display: none; }
    }

    /* price */
    #price {
        background: var(--surface-white);
        border-top: 1px solid var(--border-mist);
        border-bottom: 1px solid var(--border-mist);
    }
    .price-grid {
        display: grid;
        grid-template-columns: 1.2fr .8fr;
        gap: 40px;
        align-items: stretch;
    }
    .price-main {
        border: 1px solid var(--ink-main);
        border-radius: var(--radius);
        background: var(--surface-white);
        padding: 48px;
        position: relative;
        transition: box-shadow var(--transition);
    }
    .price-main:hover { box-shadow: 0 12px 32px rgba(27,26,23,.08); }
    .price-main .rec-tag {
        position: absolute;
        top: -12px;
        left: 48px;
        background: var(--accent-red);
        color: #fff;
        font-size: 14px;
        padding: 4px 20px;
        border-radius: 2px;
        letter-spacing: .08em;
    }
    .price-main h3 {
        font-family: var(--font-head);
        font-size: 28px;
        font-weight: 600;
        margin-bottom: 12px;
    }
    .price-main .price-desc {
        font-size: 16px;
        color: var(--text-secondary);
        max-width: 340px;
        line-height: 1.8;
    }
    .price-figure {
        font-family: "Helvetica Neue", var(--font-body);
        font-size: 56px;
        font-weight: 300;
        margin: 40px 0 12px;
        line-height: 1;
        display: flex;
        align-items: baseline;
        gap: 4px;
    }
    .price-extra { font-size: 15px; color: var(--text-secondary); margin-bottom: 40px; }
    .price-main .btn-prime { width: 100%; }
    .price-secondary {
        border: 1px solid var(--border-mist);
        border-radius: var(--radius);
        background: var(--bg-warm);
        padding: 48px;
        display: flex;
        flex-direction: column;
    }
    .price-secondary h4 {
        font-family: var(--font-head);
        font-size: 20px;
        font-weight: 600;
        margin-bottom: 8px;
    }
    .price-secondary .price-desc {
        font-size: 15px;
        color: var(--text-secondary);
    }
    .price-secondary-list {
        margin-top: 24px;
        display: flex;
        flex-direction: column;
        gap: 12px;
    }
    .price-secondary-list li {
        font-size: 15px;
        color: var(--ink-main);
        display: flex;
        gap: 8px;
        align-items: flex-start;
    }
    .price-secondary-list li i {
        color: var(--bronze);
        margin-right: 4px;
        line-height: 1.6;
    }
    .price-secondary-cta {
        margin-top: auto;
        display: inline-flex;
        align-items: center;
        gap: 8px;
        font-size: 15px;
        font-weight: 500;
        border-bottom: 1px solid var(--ink-main);
        padding-bottom: 4px;
        align-self: flex-start;
    }
    .price-secondary-cta:hover {
        color: var(--accent-red);
        border-color: var(--accent-red);
    }
    @media (max-width: 768px) {
        .price-grid { grid-template-columns: 1fr; }
        .price-main, .price-secondary { padding: 32px; }
    }

    /* faq */
    #faq {
        background: var(--surface-white);
        padding-top: 0;
        border-bottom: 1px solid var(--border-mist);
    }
    .faq-grid {
        display: grid;
        grid-template-columns: .85fr 1.15fr;
        gap: 80px;
        align-items: start;
    }
    .faq-head-sticky {
        position: sticky;
        top: 120px;
    }
    .faq-grid .faq-desc p {
        font-size: 16px;
        color: var(--text-secondary);
        line-height: 1.9;
    }
    .contact-mini {
        margin-top: 28px;
        display: flex;
        align-items: center;
        gap: 16px;
        padding: 16px 0 16px 22px;
        border-left: 2px solid var(--bronze);
        font-size: 15px;
        color: var(--ink-main);
    }
    .contact-mini i {
        color: var(--accent-red);
        font-size: 20px;
    }
    .contact-mini span { color: var(--text-secondary); font-size: 14px; }
    .faq-list {
        border-top: 1px solid var(--border-mist);
    }
    .faq-item {
        border-bottom: 1px solid var(--border-mist);
    }
    .faq-q {
        display: flex;
        justify-content: space-between;
        align-items: center;
        width: 100%;
        background: transparent;
        border: none;
        padding: 22px 0;
        font-size: 17px;
        font-family: var(--font-body);
        font-weight: 500;
        color: var(--ink-main);
        cursor: pointer;
        text-align: left;
        transition: color var(--transition);
        min-height: 60px;
    }
    .faq-q:focus {
        outline: 2px solid var(--accent-red);
        outline-offset: 2px;
    }
    .faq-q:hover { color: var(--accent-red); }
    .faq-icon {
        color: var(--accent-red);
        font-size: 22px;
        transition: transform var(--transition);
        display: inline-flex;
        align-items: center;
    }
    .faq-item.open .faq-icon {
        transform: rotate(45deg);
    }
    .faq-a {
        max-height: 0;
        overflow: hidden;
        transition: max-height .45s ease;
    }
    .faq-a-inner {
        padding: 0 20px 22px 0;
        font-size: 15px;
        color: var(--text-secondary);
        line-height: 1.9;
    }
    .faq-a-inner p { margin-bottom: 0; }
    @media (max-width: 1024px) {
        .faq-grid { grid-template-columns: 1fr; gap: 40px; }
        .faq-head-sticky { position: static; }
    }

    /* cta */
    #contact-cta {
        background: var(--bg-warm);
        border-bottom: 1px solid var(--border-mist);
    }
    .cta-grid {
        display: grid;
        grid-template-columns: 1fr 1.1fr;
        gap: 80px;
        align-items: center;
    }
    .cta-info p {
        font-size: 17px;
        color: var(--text-secondary);
        line-height: 1.9;
        margin-bottom: 24px;
    }
    .cta-detail {
        margin-top: 32px;
        display: flex;
        flex-direction: column;
        gap: 12px;
    }
    .cta-detail .item {
        display: flex;
        align-items: center;
        gap: 12px;
        font-size: 15px;
        color: var(--ink-main);
    }
    .cta-detail .item i {
        width: 24px;
        color: var(--accent-red);
        font-size: 18px;
    }
    .cta-form-wrap {
        background: var(--surface-white);
        border: 1px solid var(--border-mist);
        border-radius: var(--radius);
        padding: 44px;
        box-shadow: 0 8px 30px rgba(27, 26, 23, .04);
    }
    .cta-form-wrap h3 {
        font-family: var(--font-head);
        font-size: 24px;
        margin-bottom: 28px;
        font-weight: 600;
    }
    .form-field {
        margin-bottom: 24px;
    }
    .form-field label {
        display: block;
        font-size: 14px;
        color: var(--text-secondary);
        margin-bottom: 7px;
        letter-spacing: .02em;
        font-weight: 500;
    }
    .form-field input,
    .form-field select,
    .form-field textarea {
        width: 100%;
        border: none;
        border-bottom: 1px solid var(--border-mist);
        padding: 10px 2px;
        background: transparent;
        font-family: var(--font-body);
        font-size: 16px;
        color: var(--ink-main);
        transition: border-color var(--transition);
        border-radius: 0;
        box-shadow: none;
    }
    .form-field input:focus,
    .form-field select:focus,
    .form-field textarea:focus {
        border-bottom-color: var(--accent-red);
        outline: none;
        box-shadow: none;
    }
    .form-field select {
        appearance: none;
        -webkit-appearance: none;
        background: transparent;
    }
    .form-field textarea { min-height: 80px; resize: none; }
    .field-actions .btn-prime { width: 100%; }
    @media (max-width: 1024px) {
        .cta-grid { grid-template-columns: 1fr; gap: 40px; }
    }
    @media (max-width: 768px) {
        .cta-form-wrap { padding: 28px 20px; }
        .contact-mini { padding-left: 12px; }
    }

    /* footer */
    footer.site-footer {
        background: #161512;
        color: #a6a093;
        padding: 72px 0 0;
    }
    .footer-top {
        display: flex;
        justify-content: space-between;
        gap: 64px;
        padding-bottom: 56px;
        flex-wrap: wrap;
    }
    .footer-brand-col {
        flex: 1.2;
        min-width: 260px;
    }
    .footer-brand-col .site-logo {
        color: #fff;
        margin-bottom: 16px;
    }
    .footer-brand-desc {
        font-size: 15px;
        color: #aaa;
        line-height: 1.8;
        max-width: 400px;
    }
    .footer-cols {
        display: flex;
        gap: 60px;
        flex-wrap: wrap;
    }
    .footer-col h4 {
        font-family: var(--font-head);
        font-size: 17px;
        color: #fff;
        font-weight: 600;
        margin-bottom: 18px;
    }
    .footer-col ul li {
        margin-bottom: 10px;
    }
    .footer-col ul li a {
        font-size: 14px;
        color: #b9b2a8;
        transition: color var(--transition);
    }
    .footer-col ul li a:hover { color: var(--accent-red); }
    .footer-bottom {
        border-top: 1px solid rgba(255, 255, 255, .06);
        padding: 28px 0;
        font-size: 14px;
        color: #877f74;
        text-align: center;
    }
    .footer-bottom .container-custom {
        display: flex;
        justify-content: space-between;
        flex-wrap: wrap;
        gap: 12px;
    }
    .footer-bottom a { color: #b9b2a8; }
    .footer-bottom a:hover { color: var(--accent-red); }
    @media (max-width: 768px) {
        .footer-top { flex-direction: column; gap: 36px; }
        .footer-bottom .container-custom { flex-direction: column; text-align: center; }
    }

    /* float CTA */
    .float-cta {
        position: fixed;
        right: 28px;
        bottom: 30px;
        background: var(--cta-dark);
        color: #fff;
        border-radius: 100px;
        display: flex;
        align-items: center;
        gap: 8px;
        padding: 14px 22px;
        font-size: 14px;
        font-weight: 500;
        cursor: pointer;
        z-index: 999;
        border: 1px solid transparent;
        transition: all .35s ease;
        box-shadow: 0 8px 24px rgba(27, 26, 23, .12);
        opacity: 0;
        transform: translateY(16px);
        pointer-events: none;
    }
    .float-cta.show {
        opacity: 1;
        transform: translateY(0);
        pointer-events: auto;
    }
    .float-cta:hover {
        background: var(--accent-red);
        color: #fff;
        border-color: var(--accent-red);
    }
    .float-cta i { font-size: 16px; }
    .footer-display .float-cta { opacity: 0; pointer-events: none; }
    @media (max-width: 768px) {
        .float-cta { bottom: 20px; right: 16px; padding: 10px 18px; font-size: 13px; }
        .section-pad { padding: 48px 0; }
    }

    /* Reveal */
    .reveal {
        opacity: 0;
        transform: translateY(24px);
        transition: opacity .7s ease, transform .7s ease;
    }
    .reveal.active {
        opacity: 1;
        transform: translateY(0);
    }

    /* skeleton / temporary removed style */
    .cms-layer .cms-empty {
        font-size: 15px;
        color: var(--text-secondary);
        padding: 20px 0;
        letter-spacing: .02em;
    }

/* roulang page: category1 */
/* ========== Design Variables ========== */
        :root {
            --bg-warm: #F7F5F0;
            --surface-white: #FFFFFF;
            --ink-black: #1B1A17;
            --text-secondary: #6F6A61;
            --border-line: #E7E1D8;
            --accent-red: #A52A2A;
            --bronze: #9A7A58;
            --cta-bg: #1B1A17;
            --cta-hover: #A52A2A;
            --radius-card: 3px;
            --radius-btn: 3px;
            --shadow-light: 0 10px 30px rgba(27, 26, 23, 0.05);
            --shadow-hover: 0 15px 40px rgba(27, 26, 23, 0.08);
            --container: 1320px;
            --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", SimSun, serif;
            --font-sans: "Inter", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            --transition-base: all 0.3s ease;
        }

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

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

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-warm);
            color: var(--ink-black);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

        ul,
        ol {
            list-style: none;
        }

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

        :focus-visible {
            outline: 2px solid var(--accent-red);
            outline-offset: 3px;
            border-radius: 2px;
        }

        .container-custom {
            width: 100%;
            max-width: var(--container);
            margin-left: auto;
            margin-right: auto;
            padding-left: 28px;
            padding-right: 28px;
        }

        h1,
        h2,
        h3,
        h4 {
            font-family: var(--font-serif);
            font-weight: 600;
            line-height: 1.3;
            letter-spacing: 0.02em;
            color: var(--ink-black);
        }

        .serif-title {
            font-family: var(--font-serif);
            font-weight: 600;
            letter-spacing: 0.02em;
        }

        .bg-white {
            background-color: var(--surface-white);
        }

        .section-pad {
            padding-top: 100px;
            padding-bottom: 100px;
        }

        .text-muted {
            color: var(--text-secondary);
        }

        @media (max-width: 1024px) {
            .section-pad {
                padding-top: 72px;
                padding-bottom: 72px;
            }
        }

        @media (max-width: 768px) {
            .section-pad {
                padding-top: 56px;
                padding-bottom: 56px;
            }
        }

        /* ========== Buttons ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-family: var(--font-sans);
            font-weight: 500;
            font-size: 15px;
            line-height: 1;
            padding: 16px 30px;
            border-radius: var(--radius-btn);
            cursor: pointer;
            text-align: center;
            border: 1px solid transparent;
            transition: all 0.35s ease;
            letter-spacing: 0.01em;
        }

        .btn-primary {
            background-color: var(--cta-bg);
            color: #fff;
            border-color: var(--cta-bg);
        }

        .btn-primary:hover {
            background-color: var(--cta-hover);
            border-color: var(--cta-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 10px 25px rgba(165, 42, 42, 0.15);
        }

        .btn-outline {
            background: transparent;
            color: var(--ink-black);
            border-color: var(--ink-black);
        }

        .btn-outline:hover {
            border-color: var(--accent-red);
            color: var(--accent-red);
            background-color: rgba(255, 255, 255, 0.6);
            transform: translateY(-2px);
        }

        .btn-light-outline {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, 0.7);
        }

        .btn-light-outline:hover {
            border-color: #fff;
            color: #fff;
            background-color: rgba(255, 255, 255, 0.1);
            transform: translateY(-2px);
        }

        .btn-dark {
            background-color: var(--ink-black);
            color: #fff;
        }

        .btn-dark:hover {
            background-color: var(--accent-red);
            color: #fff;
            transform: translateY(-2px);
        }

        .btn-sm {
            padding: 12px 22px;
            font-size: 14px;
        }

        .btn i {
            font-size: 13px;
            transition: transform 0.35s ease;
        }

        .btn:hover i {
            transform: translateX(4px);
        }

        /* ========== Header Nav ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            height: 80px;
            display: flex;
            align-items: center;
            background: rgba(247, 245, 240, 0.86);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(231, 225, 216, 0.7);
            transition: var(--transition-base);
        }

        .site-header.scrolled {
            background: rgba(247, 245, 240, 0.95);
            box-shadow: 0 4px 20px rgba(27, 26, 23, 0.03);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            width: 100%;
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 28px;
        }

        .site-logo {
            font-family: var(--font-serif);
            font-size: 28px;
            font-weight: 600;
            letter-spacing: 0.02em;
            color: var(--ink-black);
            display: flex;
            align-items: baseline;
            gap: 4px;
            line-height: 1.2;
            flex-shrink: 0;
        }

        .site-logo:hover {
            color: var(--accent-red);
        }

        .logo-en {
            font-family: "Inter", var(--font-sans);
            font-weight: 600;
            font-size: 26px;
            letter-spacing: -0.01em;
        }

        .logo-cn {
            font-size: 20px;
            font-weight: 600;
            margin-left: 2px;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 32px;
        }

        .nav-links a {
            font-size: 15px;
            font-weight: 500;
            color: var(--ink-black);
            padding: 8px 2px;
            position: relative;
            line-height: 1.4;
            background: none;
            border: none;
        }

        .nav-links a::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 0;
            height: 2px;
            background-color: var(--accent-red);
            transition: width 0.3s ease;
        }

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

        .nav-links a:hover {
            color: var(--accent-red);
        }

        .nav-links a.active {
            color: var(--ink-black);
            font-weight: 500;
        }

        .nav-links a.active::after {
            width: 24px;
            height: 2px;
            background: var(--accent-red);
        }

        .header-cta {
            margin-left: 8px;
        }

        .header-cta .btn {
            padding: 12px 24px;
            font-size: 14px;
        }

        .menu-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            width: 44px;
            height: 44px;
            background: none;
            border: none;
            cursor: pointer;
            gap: 6px;
            z-index: 1002;
        }

        .menu-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background-color: var(--ink-black);
            transition: var(--transition-base);
            border-radius: 2px;
        }

        .menu-toggle.active span:nth-child(1) {
            transform: translateY(8px) rotate(45deg);
        }

        .menu-toggle.active span:nth-child(2) {
            opacity: 0;
        }

        .menu-toggle.active span:nth-child(3) {
            transform: translateY(-8px) rotate(-45deg);
        }

        /* Mobile menu drawer */
        .mobile-menu {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100vh;
            background: rgba(247, 245, 240, 0.98);
            backdrop-filter: blur(10px);
            z-index: 1001;
            padding: 100px 40px 40px;
            flex-direction: column;
            opacity: 0;
            visibility: hidden;
            transition: opacity 0.4s ease, visibility 0.4s ease;
        }

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

        .mobile-menu a {
            font-family: var(--font-serif);
            font-size: 26px;
            line-height: 1.6;
            color: var(--ink-black);
            padding: 14px 0;
            border-bottom: 1px solid var(--border-line);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .mobile-menu a:hover {
            color: var(--accent-red);
            padding-left: 6px;
        }

        .mobile-menu a i {
            font-size: 18px;
            color: var(--bronze);
        }

        /* ========== Breadcrumb ========== */
        .breadcrumb-wrap {
            padding-top: 140px;
            padding-bottom: 20px;
            background: var(--bg-warm);
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 14px;
            color: var(--text-secondary);
        }

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

        .breadcrumb i {
            font-size: 10px;
            color: var(--bronze);
        }

        .breadcrumb .current {
            color: var(--ink-black);
            font-weight: 500;
        }

        /* ========== Page Hero ========== */
        .page-hero {
            background: var(--bg-warm);
            padding-top: 20px;
            padding-bottom: 50px;
            border-bottom: 1px solid var(--border-line);
        }

        .page-hero .hero-title {
            font-size: 50px;
            line-height: 1.2;
            letter-spacing: 0.02em;
            max-width: 960px;
            margin-bottom: 24px;
        }

        .page-hero .hero-title .highlight {
            color: var(--accent-red);
            position: relative;
        }

        .page-hero .hero-lead {
            font-size: 17px;
            line-height: 1.9;
            color: var(--text-secondary);
            max-width: 760px;
            margin-top: 16px;
        }

        .hero-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 28px;
        }

        /* ========== Tag Badge ========== */
        .badge-line {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 16px;
            border: 1px solid var(--border-line);
            border-radius: 100px;
            font-size: 13px;
            color: var(--text-secondary);
            background: transparent;
            transition: var(--transition-base);
            letter-spacing: 0.03em;
            cursor: default;
        }

        .badge-line i {
            color: var(--bronze);
            font-size: 12px;
        }

        /* ========== Section Title ========== */
        .section-heading {
            margin-bottom: 48px;
        }

        .section-heading .eyebrow {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 13px;
            letter-spacing: 0.12em;
            text-transform: uppercase;
            color: var(--bronze);
            margin-bottom: 16px;
            font-weight: 600;
        }

        .section-heading .eyebrow::before {
            content: "";
            width: 32px;
            height: 2px;
            background: var(--bronze);
        }

        .section-heading h2 {
            font-size: 38px;
            line-height: 1.25;
            letter-spacing: 0.02em;
        }

        .section-heading p {
            margin-top: 14px;
            color: var(--text-secondary);
            font-size: 16px;
            line-height: 1.8;
            max-width: 640px;
        }

        /* ========== Sidebar nav for category switch ========== */
        .category-switch {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
            justify-content: space-between;
            padding: 20px 0;
            margin-bottom: 32px;
            border-top: 1px solid var(--border-line);
            border-bottom: 1px solid var(--border-line);
        }

        .switch-label {
            font-size: 14px;
            color: var(--text-secondary);
            margin-right: 12px;
        }

        .switch-links {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .switch-links a {
            padding: 10px 22px;
            border: 1px solid var(--border-line);
            border-radius: 100px;
            font-size: 14px;
            background: transparent;
            color: var(--text-secondary);
            transition: var(--transition-base);
        }

        .switch-links a i {
            margin-left: 6px;
            font-size: 12px;
        }

        .switch-links a:hover {
            border-color: var(--accent-red);
            color: var(--accent-red);
            background: rgba(165, 42, 42, 0.04);
        }

        .switch-links a.current-link {
            border-color: var(--ink-black);
            background: var(--ink-black);
            color: #fff;
        }

        .switch-links a.current-link:hover {
            border-color: var(--accent-red);
            background: var(--accent-red);
            color: #fff;
        }

        /* ========== Main Guide Hero image ========== */
        .guide-banner {
            margin: 20px 0 60px;
            border-radius: 2px;
            overflow: hidden;
            position: relative;
        }

        .guide-banner img {
            width: 100%;
            min-height: 380px;
            object-fit: cover;
            display: block;
        }

        .guide-banner .banner-overlay {
            position: absolute;
            left: 0;
            bottom: 0;
            width: 100%;
            padding: 36px 40px;
            background: linear-gradient(180deg, transparent 0%, rgba(27, 26, 23, 0.72) 100%);
            color: #fff;
        }

        .guide-banner .caption {
            font-size: 14px;
            color: rgba(255,255,255,0.8);
            letter-spacing: 0.05em;
            margin-bottom: 4px;
        }

        .guide-banner .title {
            font-family: var(--font-serif);
            font-size: 24px;
            font-weight: 600;
            margin: 0;
            color: #fff;
        }

        /* ========== Alt Content Row ========== */
        .alt-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 72px;
            align-items: center;
            margin-bottom: 72px;
        }

        .alt-row .media-col {
            border-radius: 2px;
            overflow: hidden;
            box-shadow: var(--shadow-light);
        }

        .alt-row .media-col img {
            width: 100%;
            min-height: 280px;
            object-fit: cover;
            aspect-ratio: 4/3;
        }

        .alt-row .text-col h3 {
            font-size: 28px;
            line-height: 1.35;
            margin-bottom: 16px;
        }

        .alt-row .text-col p {
            color: var(--text-secondary);
            line-height: 1.9;
            margin-bottom: 16px;
        }

        .alt-row.reverse {
            direction: rtl;
        }

        .alt-row.reverse>* {
            direction: ltr;
        }

        .alt-row .text-col .point-card {
            background: var(--surface-white);
            border-left: 3px solid var(--bronze);
            padding: 22px 24px;
            margin-bottom: 14px;
            border-radius: 0 2px 2px 0;
            transition: var(--transition-base);
            box-shadow: none;
        }

        .alt-row .text-col .point-card:hover {
            box-shadow: var(--shadow-light);
            transform: translateX(4px);
            border-left-color: var(--accent-red);
        }

        .alt-row .text-col .point-card h4 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 6px;
            font-family: var(--font-sans);
            letter-spacing: 0.01em;
        }

        .alt-row .text-col .point-card p {
            font-size: 15px;
            margin-bottom: 0;
            line-height: 1.7;
        }

        @media (max-width: 1024px) {
            .alt-row {
                gap: 40px;
                grid-template-columns: 1fr;
                margin-bottom: 48px;
            }

            .alt-row.reverse {
                direction: ltr;
            }

            .page-hero .hero-title {
                font-size: 38px;
            }
        }

        /* ========== Number list ========== */
        .number-list {
            counter-reset: step;
            display: flex;
            flex-direction: column;
        }

        .number-item {
            counter-increment: step;
            padding: 28px 0;
            border-bottom: 1px solid var(--border-line);
            display: flex;
            gap: 30px;
            align-items: flex-start;
            transition: var(--transition-base);
        }

        .number-item:first-of-type {
            border-top: 1px solid var(--border-line);
        }

        .number-item .num {
            flex-shrink: 0;
            width: 64px;
            height: 64px;
            border-radius: 50%;
            border: 1px solid var(--border-line);
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: "Inter", var(--font-serif);
            font-size: 22px;
            font-weight: 600;
            color: var(--ink-black);
            background: var(--surface-white);
            transition: var(--transition-base);
        }

        .number-item:hover .num {
            border-color: var(--accent-red);
            color: var(--accent-red);
            transform: scale(1.04);
            box-shadow: 0 0 0 4px rgba(165, 42, 42, 0.06);
        }

        .number-item .content h3 {
            font-size: 21px;
            font-weight: 600;
            margin-bottom: 10px;
            font-family: var(--font-serif);
        }

        .number-item .content p {
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.8;
            max-width: 640px;
        }

        /* ========== Scenario cards two-col ========== */
        .scenario-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
        }

        .scenario-card {
            background: var(--surface-white);
            border: 1px solid var(--border-line);
            border-radius: var(--radius-card);
            padding: 36px 32px;
            transition: var(--transition-base);
            position: relative;
            overflow: hidden;
        }

        .scenario-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--ink-black);
            transform: scaleX(0);
            transform-origin: left;
            transition: transform 0.45s ease;
        }

        .scenario-card:hover {
            box-shadow: var(--shadow-light);
            transform: translateY(-4px);
            border-color: rgba(27, 26, 23, 0.25);
        }

        .scenario-card:hover::before {
            transform: scaleX(1);
        }

        .scenario-card .card-icon {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: rgba(154, 122, 88, 0.10);
            color: var(--bronze);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            margin-bottom: 20px;
        }

        .scenario-card h3 {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 12px;
            font-family: var(--font-serif);
        }

        .scenario-card p {
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.8;
            margin-bottom: 16px;
        }

        .scenario-card .meta-list {
            margin-top: 10px;
        }

        .scenario-card .meta-list li {
            font-size: 14px;
            color: var(--text-secondary);
            padding: 6px 0;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .scenario-card .meta-list li i {
            color: var(--bronze);
            font-size: 12px;
        }

        /* ========== Blockquote / Stats ========== */
        .quote-block {
            max-width: 900px;
            margin: 0 auto 60px;
            padding: 40px 36px 40px 60px;
            border-left: 3px solid var(--bronze);
            background: var(--surface-white);
            position: relative;
        }

        .quote-block .quote-mark {
            position: absolute;
            top: 10px;
            left: 16px;
            font-family: serif;
            font-size: 64px;
            color: var(--bronze);
            line-height: 1;
        }

        .quote-block blockquote {
            margin-bottom: 12px;
            font-family: var(--font-serif);
            font-size: 22px;
            line-height: 1.7;
            color: var(--ink-black);
            font-weight: 500;
        }

        .quote-block .quote-from {
            font-size: 14px;
            color: var(--text-secondary);
            letter-spacing: 0.05em;
        }

        .stats-row {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin: 50px 0 20px;
        }

        .stat-card {
            background: var(--surface-white);
            border: 1px solid var(--border-line);
            border-radius: var(--radius-card);
            padding: 32px 28px;
            text-align: center;
            transition: var(--transition-base);
        }

        .stat-card:hover {
            box-shadow: var(--shadow-light);
        }

        .stat-number {
            font-family: "Inter", var(--font-serif);
            font-size: 52px;
            font-weight: 600;
            letter-spacing: -0.02em;
            color: var(--ink-black);
            line-height: 1.1;
            margin-bottom: 10px;
        }

        .stat-label {
            font-size: 15px;
            color: var(--text-secondary);
            font-family: var(--font-sans);
        }

        /* ========== CTA Band ========== */
        .cta-band {
            background: var(--ink-black);
            color: #fff;
            padding: 64px 0;
            margin-top: 20px;
            border-radius: 0;
        }

        .cta-band-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
            flex-wrap: wrap;
        }

        .cta-band .cta-title {
            font-family: var(--font-serif);
            font-size: 28px;
            margin-bottom: 8px;
            color: #fff;
        }

        .cta-band .cta-text {
            color: rgba(255, 255, 255, 0.75);
            font-size: 15px;
            max-width: 560px;
            line-height: 1.8;
        }

        .cta-actions {
            display: flex;
            gap: 16px;
            flex-shrink: 0;
        }

        /* ========== FAQ ========== */
        .faq-list {
            border-top: 1px solid var(--border-line);
        }

        .faq-item {
            border-bottom: 1px solid var(--border-line);
            transition: background-color 0.3s ease;
        }

        .faq-item .faq-q {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 20px;
            padding: 22px 4px;
            cursor: pointer;
            font-family: var(--font-serif);
            font-size: 17px;
            font-weight: 600;
            color: var(--ink-black);
            line-height: 1.5;
            transition: var(--transition-base);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
        }

        .faq-item .faq-q:hover,
        .faq-item.active .faq-q {
            color: var(--accent-red);
        }

        .faq-item .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 1px solid var(--border-line);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: var(--transition-base);
            font-size: 14px;
            color: var(--ink-black);
        }

        .faq-item.active .faq-icon {
            border-color: var(--accent-red);
            background: var(--accent-red);
            color: #fff;
            transform: rotate(45deg);
        }

        .faq-item .faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 4px 0 32px;
        }

        .faq-item .faq-a p {
            padding-bottom: 24px;
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.9;
        }

        /* ========== Footer ========== */
        .site-footer {
            background: #121210;
            color: #C8C1B6;
            font-size: 14px;
            padding-top: 64px;
        }

        .site-footer .container-custom {
            padding: 0 28px;
        }

        .footer-top {
            display: grid;
            grid-template-columns: 1.4fr 1fr;
            gap: 60px;
            padding-bottom: 32px;
        }

        .footer-brand-col .site-logo {
            color: #fff;
        }

        .footer-brand-col .site-logo:hover {
            color: #d45757;
        }

        .footer-brand-col .logo-en {
            font-size: 28px;
        }

        .footer-brand-col .logo-cn {
            font-size: 22px;
        }

        .footer-brand-desc {
            margin-top: 20px;
            font-size: 14px;
            line-height: 1.9;
            color: #B6AEA0;
            max-width: 460px;
            margin-bottom: 0;
        }

        .footer-cols {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
        }

        .footer-col h4 {
            font-family: var(--font-sans);
            font-size: 14px;
            font-weight: 600;
            color: #EADFD2;
            margin-bottom: 20px;
            letter-spacing: 0.06em;
            text-transform: none;
        }

        .footer-col ul li {
            margin-bottom: 12px;
        }

        .footer-col ul li a {
            color: #B6AEA0;
            transition: var(--transition-base);
            font-size: 14px;
        }

        .footer-col ul li a:hover {
            color: #C0492D;
            padding-left: 4px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 20px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            color: #91897D;
            font-size: 13px;
            flex-wrap: wrap;
            gap: 10px;
        }

        .footer-bottom .container-custom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            flex-wrap: wrap;
        }

        .footer-bottom a {
            color: #B6AEA0;
        }

        .footer-bottom a:hover {
            color: #fff;
        }

        @media (max-width: 1024px) {
            .footer-top {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .footer-col {
                margin-top: 12px;
            }
        }

        /* ========== Floating CTA ========== */
        .float-cta {
            position: fixed;
            bottom: 40px;
            right: 36px;
            z-index: 900;
            opacity: 0;
            visibility: hidden;
            transform: translateY(20px);
            transition: var(--transition-base);
        }

        .float-cta.visible {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .float-cta .btn-float {
            width: auto;
            padding: 16px 28px;
            border-radius: 50px;
            background: var(--ink-black);
            color: #fff;
            font-size: 14px;
            font-weight: 500;
            box-shadow: 0 8px 30px rgba(27, 26, 23, 0.25);
            transition: var(--transition-base);
            display: flex;
            align-items: center;
            gap: 10px;
            line-height: 1;
            border: 1px solid transparent;
        }

        .float-cta .btn-float:hover {
            background: var(--accent-red);
            transform: translateY(-3px);
            box-shadow: 0 14px 36px rgba(27, 26, 23, 0.3);
        }

        .float-cta .btn-float .fa-circle {
            font-size: 8px;
            color: #6FD08C;
        }

        /* ========== Global scroll reveal ========== */
        .reveal {
            opacity: 0;
            transform: translateY(28px);
            transition: opacity 0.7s ease, transform 0.7s ease;
        }

        .reveal.visible {
            opacity: 1;
            transform: translateY(0);
        }

        .reveal-delay-1 { transition-delay: 0.08s; }
        .reveal-delay-2 { transition-delay: 0.16s; }
        .reveal-delay-3 { transition-delay: 0.24s; }

        /* ========== Responsive ========== */
        @media (max-width: 1024px) {
            .nav-links {
                display: none;
            }

            .menu-toggle {
                display: flex;
            }

            .mobile-menu {
                display: flex;
            }

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

            .stats-row {
                grid-template-columns: 1fr;
            }

            .header-inner {
                padding: 0 20px;
            }
        }

        @media (max-width: 768px) {
            .container-custom {
                padding-left: 20px;
                padding-right: 20px;
            }

            .page-hero .hero-title {
                font-size: 30px;
            }

            .page-hero .hero-lead {
                font-size: 16px;
            }

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

            .quote-block {
                padding: 32px 24px 32px 44px;
            }

            .quote-block blockquote {
                font-size: 18px;
            }

            .number-item {
                flex-direction: column;
                gap: 16px;
            }

            .number-item .num {
                width: 52px;
                height: 52px;
                font-size: 18px;
            }

            .cta-band-inner {
                flex-direction: column;
                align-items: flex-start;
            }

            .cta-actions {
                flex-direction: column;
                width: 100%;
            }

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

            .float-cta {
                bottom: 20px;
                right: 20px;
            }

            .float-cta .btn-float {
                padding: 12px 18px;
                font-size: 13px;
            }

            .guide-banner img {
                min-height: 220px;
                object-fit: cover;
            }

            .guide-banner .banner-overlay {
                padding: 20px;
            }

            .guide-banner .title {
                font-size: 18px;
            }
        }

        @media (max-width: 520px) {
            .stats-row {
                gap: 16px;
            }

            .stat-card {
                padding: 24px 18px;
            }

            .stat-number {
                font-size: 42px;
            }

            .scenario-card {
                padding: 28px 20px;
            }

            .alt-row .text-col .point-card {
                padding: 18px 16px;
            }

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

            .footer-top {
                gap: 32px;
            }
        }

/* roulang page: article */
:root {
            --bg: #F7F5F0;
            --surface: #FFFFFF;
            --ink: #1B1A17;
            --ink-strong: #100F0D;
            --ink-soft: #46423D;
            --text-weak: #6F6A61;
            --line: #E7E1D8;
            --line-deep: #D8D1C7;
            --red: #A52A2A;
            --red-hover: #8D2222;
            --bronze: #9A7A58;
            --serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", SimSun, serif;
            --sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", sans-serif;
            --container: 1320px;
            --radius: 4px;
            --shadow: 0 18px 36px rgba(30, 24, 16, .06);
            --shadow-hover: 0 24px 48px rgba(30, 24, 16, .10);
            --transition: .3s ease;
        }

        *,
        *::before,
        *::after {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

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

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

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

        button,
        input,
        textarea,
        select {
            font-family: var(--sans);
            font-size: 15px;
            color: var(--ink);
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4 {
            font-family: var(--serif);
            color: var(--ink);
            line-height: 1.4;
            font-weight: 600;
        }

        .container-custom {
            width: 100%;
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 32px;
        }

        .article-narrow {
            max-width: 860px;
            margin: 0 auto;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 52px;
            padding: 0 32px;
            font-size: 15px;
            letter-spacing: .04em;
            border: 1px solid transparent;
            border-radius: var(--radius);
            cursor: pointer;
            background: transparent;
            text-align: center;
            white-space: nowrap;
            transition: background var(--transition), border-color var(--transition), color var(--transition), transform var(--transition), box-shadow var(--transition);
        }

        .btn-primary {
            background: var(--ink);
            color: #FFFFFF;
        }

        .btn-primary:hover,
        .btn-primary:focus {
            background: var(--red);
            color: #FFFFFF;
            transform: translateY(-2px);
            box-shadow: 0 14px 28px rgba(27, 26, 23, .18);
        }

        .btn-outline {
            border-color: var(--ink);
            color: var(--ink);
            background: transparent;
        }

        .btn-outline:hover,
        .btn-outline:focus {
            border-color: var(--red);
            color: var(--red);
            transform: translateY(-2px);
        }

        .btn-small {
            height: 42px;
            padding: 0 22px;
            font-size: 14px;
        }

        .btn:focus-visible {
            outline: 3px solid rgba(165, 42, 42, .35);
            outline-offset: 3px;
        }

        .tag-line {
            display: inline-flex;
            align-items: center;
            padding: 5px 14px;
            font-size: 13px;
            line-height: 1.2;
            color: var(--red);
            background: transparent;
            border: 1px solid rgba(165, 42, 42, .42);
            border-radius: 999px;
            letter-spacing: .03em;
            white-space: nowrap;
        }

        .tag-plain {
            display: inline-block;
            padding: 3px 12px;
            font-size: 12px;
            color: var(--text-weak);
            border: 1px solid var(--line-deep);
            border-radius: 3px;
        }

        .section-title {
            font-size: 40px;
            line-height: 1.3;
            margin-bottom: 12px;
        }

        .section-subtitle {
            font-size: 17px;
            color: var(--text-weak);
            line-height: 1.8;
            max-width: 680px;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 9999;
            height: 80px;
            background: rgba(247, 245, 240, .92);
            border-bottom: 1px solid rgba(231, 225, 216, .8);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
        }

        .site-header .header-inner {
            height: 80px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 28px;
        }

        .site-logo {
            display: inline-flex;
            align-items: baseline;
            gap: 4px;
            font-family: var(--serif);
            flex-shrink: 0;
        }

        .site-logo .logo-en {
            font-size: 30px;
            font-weight: 700;
            letter-spacing: -.01em;
            color: var(--ink-strong);
            line-height: 1;
        }

        .site-logo .logo-cn {
            font-size: 30px;
            font-weight: 700;
            color: var(--ink-strong);
            line-height: 1;
        }

        .nav-links {
            display: flex;
            align-items: center;
            justify-content: flex-end;
            gap: 38px;
            margin: 0;
        }

        .nav-links a {
            position: relative;
            display: inline-flex;
            align-items: center;
            font-size: 15px;
            line-height: 1;
            letter-spacing: .01em;
            color: var(--ink-soft);
            padding: 13px 0;
            white-space: nowrap;
            transition: color var(--transition);
        }

        .nav-links a:hover,
        .nav-links a:focus-visible {
            color: var(--red);
            outline: none;
        }

        .nav-links a::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 8px;
            width: 0;
            height: 2px;
            background: var(--red);
            transition: width .28s ease;
        }

        .nav-links a.active {
            color: var(--ink);
            font-weight: 500;
        }

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

        .header-cta {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 42px;
            padding: 0 22px;
            font-size: 14px;
            letter-spacing: .04em;
            color: #FFFFFF;
            background: var(--ink);
            border-radius: var(--radius);
            border: 1px solid var(--ink);
            flex-shrink: 0;
            transition: background var(--transition), border-color var(--transition), transform var(--transition);
        }

        .header-cta:hover,
        .header-cta:focus-visible {
            background: var(--red);
            border-color: var(--red);
            transform: translateY(-2px);
            outline: none;
        }

        .menu-toggle {
            display: none;
            width: 46px;
            height: 46px;
            border: 0;
            background: transparent;
            align-items: center;
            justify-content: center;
            flex-direction: column;
            gap: 6px;
            cursor: pointer;
            padding: 0;
        }

        .menu-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--ink);
            border-radius: 2px;
            transition: transform .3s ease, opacity .3s ease;
        }

        .site-header.nav-open .menu-toggle span:first-child {
            transform: translateY(4px) rotate(45deg);
        }

        .site-header.nav-open .menu-toggle span:last-child {
            transform: translateY(-4px) rotate(-45deg);
        }

        .article-banner {
            position: relative;
            padding: 138px 0 78px;
            background-image: linear-gradient(100deg, rgba(23, 20, 15, .72) 0%, rgba(23, 20, 15, .32) 68%, rgba(18, 16, 13, .58) 100%), url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center 30%;
            background-repeat: no-repeat;
            color: #FFFFFF;
            overflow: hidden;
        }

        .article-banner::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(to bottom, rgba(20, 18, 14, .2) 0%, transparent 70%);
            pointer-events: none;
        }

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

        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 42px;
            font-size: 14px;
            color: rgba(255, 255, 255, .78);
        }

        .breadcrumb a {
            color: rgba(255, 255, 255, .9);
            border-bottom: 1px solid rgba(255, 255, 255, .32);
            padding-bottom: 2px;
            transition: color var(--transition), border-color var(--transition);
        }

        .breadcrumb a:hover {
            color: #FFFFFF;
            border-color: #FFFFFF;
        }

        .breadcrumb .sep {
            display: inline-block;
            color: rgba(255, 255, 255, .5);
            padding: 0 2px;
        }

        .breadcrumb .active {
            color: rgba(255, 255, 255, .98);
            border-bottom: 1px solid rgba(255, 255, 255, .5);
            padding-bottom: 2px;
        }

        .article-banner-top {
            display: flex;
            align-items: center;
            gap: 14px;
            margin-bottom: 18px;
        }

        .article-banner-top .tag-line {
            color: #FFF5EB;
            border-color: rgba(255, 255, 255, .5);
        }

        .article-banner h1 {
            font-size: 52px;
            font-weight: 700;
            line-height: 1.32;
            letter-spacing: .03em;
            color: #FFFFFF;
            max-width: 1000px;
            margin: 0 0 24px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, .12);
        }

        .article-info {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 26px;
            font-size: 14px;
            line-height: 1.4;
            color: rgba(255, 255, 255, .82);
        }

        .article-info span {
            display: inline-flex;
            align-items: center;
            gap: 7px;
        }

        .article-info span:last-child::before {
            content: "";
            width: 4px;
            height: 4px;
            border-radius: 50%;
            background: var(--bronze);
            opacity: .9;
        }

        .article-main {
            padding: 76px 0 40px;
        }

        .article-body {
            font-size: 17px;
            line-height: 1.92;
            color: var(--ink-soft);
            word-wrap: break-word;
        }

        .article-body p {
            margin: 0 0 1.8em;
            color: #403C37;
        }

        .article-body h2 {
            font-size: 32px;
            line-height: 1.4;
            font-family: var(--serif);
            font-weight: 600;
            color: var(--ink);
            margin: 2.4em 0 .8em;
            padding-bottom: .42em;
            border-bottom: 1px solid var(--line);
        }

        .article-body h3 {
            font-size: 23px;
            line-height: 1.45;
            font-family: var(--serif);
            font-weight: 600;
            color: var(--ink);
            margin: 2.1em 0 .8em;
        }

        .article-body h4 {
            font-family: var(--sans);
            font-weight: 600;
            font-size: 17px;
            color: var(--ink);
            margin: 2em 0 .7em;
        }

        .article-body ul,
        .article-body ol {
            margin: 0 0 1.8em;
            padding-left: 24px;
        }

        .article-body ul {
            list-style: disc;
        }

        .article-body ol {
            list-style: decimal;
        }

        .article-body li {
            margin-bottom: .65em;
            line-height: 1.9;
            padding-left: 4px;
        }

        .article-body li::marker {
            color: var(--bronze);
        }

        .article-body blockquote {
            position: relative;
            margin: 2.2em 0;
            padding: 22px 28px 20px 46px;
            background: rgba(154, 122, 88, .08);
            border-left: 3px solid var(--bronze);
            color: #5C5145;
            font-family: var(--serif);
            font-size: 19px;
            line-height: 1.8;
            border-radius: 0 var(--radius) var(--radius) 0;
        }

        .article-body blockquote::before {
            content: "“";
            position: absolute;
            left: 14px;
            top: 8px;
            font-size: 42px;
            color: var(--bronze);
            line-height: 1;
            opacity: .55;
        }

        .article-body blockquote p:last-child {
            margin-bottom: 0;
        }

        .article-body img {
            border-radius: var(--radius);
            width: auto;
            max-width: 100%;
            margin: 3em auto;
            box-shadow: var(--shadow);
        }

        .article-body a {
            color: var(--red);
            border-bottom: 1px solid rgba(165, 42, 42, .4);
        }

        .article-body a:hover {
            border-bottom-color: var(--red);
        }

        .article-body code {
            background: #F1EEE8;
            border: 1px solid var(--line);
            padding: 3px 8px;
            border-radius: 3px;
            font-size: 13px;
        }

        .article-body table {
            width: 100%;
            margin: 2em 0;
            border-collapse: collapse;
            font-size: 15px;
        }

        .article-body th,
        .article-body td {
            border: 1px solid var(--line-deep);
            padding: 14px 16px;
            text-align: left;
        }

        .article-body th {
            background: #F3EFE8;
            font-weight: 600;
            font-family: var(--sans);
        }

        .notfound-box {
            max-width: 760px;
            margin: 30px auto 70px;
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: 6px;
            padding: 60px 52px;
            text-align: center;
        }

        .notfound-box h2 {
            font-size: 32px;
            margin-bottom: 18px;
            color: var(--ink);
        }

        .notfound-box p {
            color: var(--text-weak);
            margin-bottom: 28px;
            font-size: 16px;
        }

        .article-taxonomy {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 18px;
            margin: 44px 0 0;
            padding: 22px 0 18px;
            border-top: 1px solid var(--line);
            border-bottom: 1px solid var(--line);
        }

        .article-tax-left {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 14px;
            font-size: 14px;
            color: var(--text-weak);
        }

        .article-tax-left a,
        .article-tax-left span {
            display: inline-flex;
        }

        .article-tax-right .link-more {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--ink);
        }

        .article-tax-right .link-more::after {
            content: "→";
            transition: transform var(--transition);
        }

        .article-tax-right .link-more:hover::after {
            transform: translateX(5px);
        }

        .related-wrap {
            background: var(--surface);
            border-top: 1px solid var(--line);
            padding: 72px 0;
            margin-top: 64px;
        }

        .related-head {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 28px;
            flex-wrap: wrap;
            margin-bottom: 36px;
        }

        .related-head h2 {
            font-size: 34px;
            line-height: 1.3;
            margin-bottom: 8px;
        }

        .related-head p {
            color: var(--text-weak);
            font-size: 15px;
            line-height: 1.7;
        }

        .related-head .link-notes {
            font-size: 14px;
            color: var(--text-weak);
            white-space: nowrap;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(2, minmax(0, 1fr));
            gap: 24px;
        }

        .related-card {
            display: flex;
            align-items: stretch;
            background: var(--bg);
            border: 1px solid var(--line);
            border-radius: var(--radius);
            min-height: 240px;
            overflow: hidden;
            transition: box-shadow var(--transition), transform var(--transition);
        }

        .related-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }

        .related-card .thumb {
            width: 38%;
            overflow: hidden;
            position: relative;
        }

        .related-card .thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .6s ease;
        }

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

        .related-card .related-content {
            flex: 1;
            padding: 30px 28px;
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            justify-content: center;
        }

        .related-content .tag-line {
            margin-bottom: 14px;
            font-size: 12px;
        }

        .related-content h3 {
            font-size: 24px;
            line-height: 1.45;
            font-family: var(--serif);
            font-weight: 600;
            color: var(--ink);
            margin-bottom: 14px;
        }

        .related-content p {
            font-size: 15px;
            line-height: 1.8;
            color: var(--text-weak);
            margin-bottom: 22px;
        }

        .related-content .text-link {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            font-weight: 500;
            color: var(--ink);
            border-bottom: 1px solid transparent;
        }

        .related-content .text-link::after {
            content: "→";
            transition: transform var(--transition);
        }

        .related-content .text-link:hover {
            color: var(--red);
            border-bottom-color: var(--red);
        }

        .related-content .text-link:hover::after {
            transform: translateX(5px);
        }

        .reader-faqs {
            padding: 78px 0 66px;
            border-bottom: 1px solid var(--line);
        }

        .faq-layout {
            display: grid;
            grid-template-columns: 320px 1fr;
            gap: 68px;
        }

        .faq-intro {
            position: sticky;
            top: 120px;
            align-self: start;
        }

        .faq-intro .section-title {
            font-size: 34px;
            margin-bottom: 16px;
            line-height: 1.35;
        }

        .faq-intro p {
            font-size: 16px;
            color: var(--text-weak);
            line-height: 1.9;
            margin-bottom: 28px;
        }

        .faq-intro a {
            color: var(--red);
            border-bottom: 1px solid rgba(165, 42, 42, .5);
            font-size: 15px;
        }

        .faq-list {
            border-top: 1px solid var(--line);
        }

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

        details.faq-item summary {
            list-style: none;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            min-height: 68px;
            padding: 16px 4px;
            font-size: 17px;
            font-weight: 500;
            color: var(--ink);
            transition: color var(--transition);
            user-select: none;
        }

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

        details.faq-item summary:hover {
            color: var(--red);
        }

        details.faq-item .plus {
            position: relative;
            width: 22px;
            height: 22px;
            flex: 0 0 22px;
            display: inline-block;
        }

        details.faq-item .plus::before,
        details.faq-item .plus::after {
            content: "";
            position: absolute;
            top: 10px;
            left: 2px;
            width: 18px;
            height: 2px;
            background: var(--ink);
            transition: transform .3s ease, background .3s ease;
        }

        details.faq-item .plus::after {
            transform: rotate(90deg);
        }

        details[open].faq-item .plus::before {
            background: var(--red);
            transform: rotate(45deg);
        }

        details[open].faq-item .plus::after {
            background: var(--red);
            transform: rotate(135deg);
        }

        details.faq-item .answer {
            padding: 2px 4px 28px;
            color: var(--text-weak);
            font-size: 15px;
            line-height: 1.9;
            max-width: 720px;
        }

        details.faq-item .answer p:not(:last-child) {
            margin-bottom: 1em;
        }

        .article-cta-band {
            padding: 80px 0;
            background: var(--surface);
        }

        .article-cta-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
            background: var(--bg);
            border: 1px solid var(--line);
            border-radius: 6px;
            padding: 58px 74px;
            flex-wrap: wrap;
        }

        .article-cta-inner h2 {
            font-size: 30px;
            line-height: 1.5;
            color: var(--ink);
            margin-bottom: 14px;
        }

        .article-cta-inner p {
            color: var(--text-weak);
            font-size: 16px;
            line-height: 1.85;
            max-width: 600px;
        }

        .article-cta-actions {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .article-cta-actions .phone-note {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.4;
        }

        .article-cta-actions .phone-note strong {
            display: block;
            font-size: 19px;
            color: var(--ink);
            font-family: var(--serif);
            letter-spacing: .02em;
        }

        .site-footer {
            background: #1B1A17;
            color: rgba(255, 255, 255, .78);
            padding-top: 70px;
            scroll-margin-top: 80px;
        }

        .site-footer a {
            color: rgba(255, 255, 255, .66);
            transition: color var(--transition);
        }

        .site-footer a:hover {
            color: #E0A59A;
        }

        .footer-top {
            display: grid;
            grid-template-columns: 3.2fr 6.8fr;
            gap: 64px;
            padding-bottom: 52px;
        }

        .site-footer .site-logo .logo-en,
        .site-footer .site-logo .logo-cn {
            color: #FFFFFF;
            font-size: 34px;
        }

        .footer-brand-desc {
            color: rgba(255, 255, 255, .58);
            font-size: 15px;
            line-height: 1.9;
            margin: 20px 0 0;
            max-width: 420px;
        }

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

        .footer-col h4 {
            font-family: var(--sans);
            font-size: 15px;
            font-weight: 600;
            color: #FFFFFF;
            margin-bottom: 20px;
            letter-spacing: .02em;
        }

        .footer-col ul li {
            margin-bottom: 12px;
        }

        .footer-col ul li a {
            font-size: 14px;
            line-height: 1.6;
            color: rgba(255, 255, 255, .68);
            transition: color var(--transition), padding-left .25s ease;
        }

        .footer-col ul li a:hover {
            color: #E4B9B0;
            padding-left: 4px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .16);
            padding: 24px 0;
            background: rgba(0, 0, 0, .12);
        }

        .footer-bottom .container-custom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            color: rgba(255, 255, 255, .46);
            font-size: 13px;
            line-height: 1.7;
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, .8);
        }

        .float-cta {
            position: fixed;
            z-index: 888;
            right: 34px;
            bottom: 34px;
            display: flex;
            align-items: center;
            gap: 8px;
            height: 48px;
            padding: 0 24px;
            font-size: 14px;
            color: #FFFFFF;
            background: var(--ink);
            border-radius: 999px;
            box-shadow: 0 16px 30px rgba(27, 26, 23, .22);
            opacity: 0;
            transform: translateY(18px) scale(.98);
            pointer-events: none;
            transition: opacity var(--transition), transform var(--transition), background .25s ease;
            border: 1px solid rgba(255, 255, 255, .16);
        }

        .float-cta.visible {
            opacity: 1;
            transform: translateY(0) scale(1);
            pointer-events: auto;
        }

        .float-cta:hover {
            background: var(--red);
            transform: translateY(-2px);
        }

        .float-cta::before {
            content: "";
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: #E7C99B;
            flex: 0 0 7px;
        }

        @media (max-width: 1180px) {
            .nav-links {
                gap: 28px;
            }
            .nav-links a {
                font-size: 14px;
            }
            .footer-top {
                grid-template-columns: 1fr;
                gap: 40px;
            }
        }

        @media (max-width: 1024px) {
            .site-header,
            .site-header .header-inner {
                height: 70px;
            }

            .menu-toggle {
                display: inline-flex;
                z-index: 10001;
            }

            .site-header .header-inner {
                position: relative;
            }

            .nav-links {
                position: fixed;
                inset: 0;
                z-index: 10000;
                flex-direction: column;
                justify-content: center;
                align-items: center;
                gap: 34px;
                background: rgba(247, 245, 240, .98);
                opacity: 0;
                visibility: hidden;
                transition: opacity .32s ease, visibility .32s ease;
                backdrop-filter: blur(18px);
                -webkit-backdrop-filter: blur(18px);
            }

            .site-header.nav-open .nav-links {
                opacity: 1;
                visibility: visible;
            }

            .nav-links a {
                font-size: 25px;
                line-height: 1.4;
                color: var(--ink);
                padding: 8px 4px;
            }

            .header-cta {
                position: absolute;
                right: 74px;
                display: inline-flex;
                height: 38px;
                padding: 0 18px;
                font-size: 13px;
            }

            .article-banner {
                padding: 112px 0 58px;
            }

            .article-banner h1 {
                font-size: 42px;
            }

            .new-grid,
            .article-cta-inner {
                padding: 46px;
            }
            .related-card {
                flex-direction: column;
            }
            .related-card .thumb {
                width: 100%;
                height: 180px;
            }
        }

        @media (max-width: 768px) {
            .container-custom {
                padding: 0 22px;
            }

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

            .article-main {
                padding: 56px 0 30px;
            }

            .article-body {
                font-size: 16px;
            }

            .article-body h2 {
                font-size: 26px;
                margin-top: 2em;
            }

            .notfound-box {
                padding: 40px 26px;
            }

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

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

            .faq-intro {
                position: static;
            }

            .article-cta-inner {
                padding: 34px 26px;
                flex-direction: column;
                align-items: flex-start;
            }

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

        @media (max-width: 560px) {
            .site-header,
            .site-header .header-inner {
                height: 60px;
            }

            .site-logo .logo-en,
            .site-logo .logo-cn {
                font-size: 24px;
            }

            .header-cta {
                display: none;
            }

            .article-banner {
                padding: 92px 0 44px;
            }

            .article-banner h1 {
                font-size: 30px;
            }

            .article-info {
                gap: 12px;
                flex-direction: column;
                align-items: flex-start;
            }

            .article-info span:last-child::before {
                display: none;
            }

            .section-title {
                font-size: 32px;
            }

            .related-wrap {
                padding: 46px 0;
                margin-top: 44px;
            }

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

            .related-card .thumb {
                height: 160px;
            }

            .footer-cols {
                grid-template-columns: 1fr;
                gap: 28px;
            }

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

            .float-cta {
                right: 16px;
                bottom: 16px;
                height: 44px;
                padding: 0 18px;
                font-size: 13px;
            }
        }

        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation: none !important;
                transition: none !important;
            }
            html {
                scroll-behavior: auto;
            }
        }

/* roulang page: category2 */
/* ===== Design Variables ===== */
    :root {
        --bg-warm: #F7F5F0;
        --surface-white: #FFFFFF;
        --ink: #1B1A17;
        --text-secondary: #6F6A61;
        --text-muted: #8C857B;
        --line: #E7E1D8;
        --line-deep: #D8D0C5;
        --black-btn: #1B1A17;
        --primary-accent: #A52A2A;
        --bronze: #9A7A58;
        --hover-bg: #F0EDE7;
        --radius: 3px;
        --shadow-lite: 0 8px 30px rgba(27, 26, 23, 0.05);
        --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", serif;
        --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
        --container-w: 1280px;
        --section-space: 104px;
    }

    /* ===== Reset & Base ===== */
    *, ::before, ::after {
        box-sizing: border-box;
        margin: 0;
        padding: 0;
    }
    html {
        scroll-behavior: smooth;
    }
    body {
        font-family: var(--font-sans);
        background: var(--bg-warm);
        color: var(--ink);
        line-height: 1.8;
        font-size: 16px;
        -webkit-font-smoothing: antialiased;
    }
    img {
        max-width: 100%;
        height: auto;
        display: block;
    }
    a {
        color: inherit;
        text-decoration: none;
        transition: color .2s ease, border-color .2s ease, background .2s ease;
    }
    ul, ol, p, h1, h2, h3, h4, h5 {
        margin: 0;
        padding: 0;
    }
    button, input, select, textarea {
        font-family: inherit;
        font-size: inherit;
    }
    .container-custom {
        max-width: var(--container-w);
        margin: 0 auto;
        padding-left: 32px;
        padding-right: 32px;
        width: 100%;
    }

    h1, h2, h3, .serif-font {
        font-family: var(--font-serif);
    }
    h1, h2, h3 {
        line-height: 1.3;
    }

    .scroll-margin {
        scroll-margin-top: 90px;
    }

    section.scroll-margin {
        scroll-margin-top: 90px;
    }

    /* ===== Buttons ===== */
    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        height: 50px;
        padding: 0 28px;
        border-radius: var(--radius);
        font-size: 15px;
        font-weight: 600;
        letter-spacing: .02em;
        border: 1px solid transparent;
        cursor: pointer;
        transition: background .3s ease, color .3s ease, border-color .3s ease, transform .3s ease;
        background: none;
        white-space: nowrap;
        text-align: center;
    }
    .btn-primary {
        background: var(--black-btn);
        color: #FFFFFF;
    }
    .btn-primary:hover, .btn-primary:focus-visible {
        background: var(--primary-accent);
        color: #fff;
        outline: none;
    }
    .btn-secondary {
        background: transparent;
        color: var(--ink);
        border-color: var(--line-deep);
    }
    .btn-secondary:hover, .btn-secondary:focus-visible {
        border-color: var(--ink);
        color: var(--ink);
        outline: none;
    }
    .btn-sm {
        height: 42px;
        padding: 0 20px;
        font-size: 14px;
    }
    .btn .arr {
        transition: transform .3s ease;
    }
    .btn:hover .arr {
        transform: translateX(4px);
    }

    .link-underline {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        font-weight: 600;
        font-size: 15px;
        border-bottom: 1px solid var(--line-deep);
        padding-bottom: 3px;
        color: var(--ink);
        transition: border-color .2s, color .2s;
    }
    .link-underline:hover {
        color: var(--primary-accent);
        border-color: var(--primary-accent);
    }

    /* Focus style */
    a:focus-visible,
    button:focus-visible,
    .accordion-item button:focus-visible {
        outline: 2px solid var(--primary-accent);
        outline-offset: 3px;
        border-radius: var(--radius);
    }

    /* ===== Header & Navigation ===== */
    .site-header {
        position: sticky;
        top: 0;
        z-index: 100;
        background: rgba(247, 245, 240, 0.85);
        -webkit-backdrop-filter: blur(14px);
        backdrop-filter: blur(14px);
        border-bottom: 1px solid var(--line);
        transition: background .3s ease;
    }
    .header-inner {
        height: 78px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        width: 100%;
        position: relative;
    }
    .site-logo {
        font-family: var(--font-serif);
        font-size: 30px;
        font-weight: 700;
        color: var(--ink);
        display: inline-flex;
        align-items: baseline;
        line-height: 1;
        letter-spacing: 0.02em;
        flex-shrink: 0;
        padding: 6px 0;
    }
    .logo-en {
        font-size: 30px;
        font-weight: 600;
        letter-spacing: -0.01em;
        color: var(--ink);
    }
    .logo-cn {
        font-size: 24px;
        font-weight: 700;
        margin-left: 5px;
        color: var(--ink);
    }
    .nav-links {
        display: flex;
        align-items: center;
        gap: 38px;
        list-style: none;
        margin: 0;
    }
    .nav-links a {
        font-size: 15px;
        font-weight: 500;
        color: var(--text-secondary);
        position: relative;
        padding: 6px 0;
        letter-spacing: .01em;
        transition: color .25s ease;
    }
    .nav-links a::after {
        content: '';
        position: absolute;
        left: 0;
        bottom: 0;
        height: 2px;
        width: 0;
        background: var(--primary-accent);
        transition: width .3s ease;
    }
    .nav-links a:hover {
        color: var(--ink);
    }
    .nav-links a.active {
        color: var(--ink);
        font-weight: 600;
    }
    .nav-links a.active::after {
        width: 100%;
    }
    .header-cta {
        display: flex;
        align-items: center;
        gap: 16px;
        flex-shrink: 0;
    }
    .nav-toggle {
        display: none;
        background: none;
        border: 0;
        width: 44px;
        height: 44px;
        cursor: pointer;
        margin-left: 12px;
        padding: 10px;
        position: relative;
        z-index: 110;
    }
    .nav-toggle span {
        display: block;
        width: 24px;
        height: 2px;
        background: var(--ink);
        margin: 5px auto;
        transition: all .3s ease;
        transform-origin: center;
    }
    .nav-toggle.open span:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }
    .nav-toggle.open span:nth-child(2) {
        opacity: 0;
    }
    .nav-toggle.open span:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }

    /* ===== Hero ===== */
    .solution-hero {
        position: relative;
        background: linear-gradient(180deg, #F0EDE7 0%, #F7F5F0 80%);
        padding: 110px 0 80px;
        overflow: hidden;
        border-bottom: 1px solid var(--line);
        background-image: url('/assets/images/backpic/back-2.webp');
        background-size: cover;
        background-position: center 20%;
    }
    .solution-hero::before {
        content: '';
        position: absolute;
        top: 0; left: 0; right: 0; bottom: 0;
        background: linear-gradient(90deg, rgba(247, 245, 240, .76) 0%, rgba(247, 245, 240, .6) 45%, rgba(247, 245, 240, .18) 100%);
    }
    .solution-hero .hero-inner {
        position: relative;
        z-index: 2;
        display: flex;
        gap: 40px;
        align-items: flex-start;
    }
    .hero-left {
        flex: 0 0 54%;
        max-width: 700px;
    }
    .hero-right {
        flex: 1;
        display: flex;
        justify-content: flex-end;
    }
    .crumb {
        display: flex;
        align-items: center;
        gap: 12px;
        font-size: 14px;
        color: var(--text-secondary);
        margin-bottom: 30px;
        flex-wrap: wrap;
        padding: 0;
        list-style: none;
    }
    .crumb li + li::before {
        content: '/';
        margin-right: 12px;
        color: var(--line-deep);
    }
    .crumb a:hover {
        color: var(--primary-accent);
    }
    .crumb .current-crumb {
        color: var(--ink);
        font-weight: 600;
    }
    .solution-hero h1 {
        font-size: 50px;
        font-weight: 700;
        line-height: 1.2;
        letter-spacing: .02em;
        margin-bottom: 24px;
        color: var(--ink);
    }
    .solution-hero h1 .red {
        color: var(--primary-accent);
    }
    .solution-hero .hero-desc {
        font-size: 18px;
        line-height: 1.9;
        color: var(--text-secondary);
        max-width: 600px;
        margin-bottom: 40px;
    }
    .hero-btns {
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        gap: 16px;
    }
    .hero-stat-row {
        margin-top: 48px;
        padding-top: 24px;
        border-top: 1px solid var(--line);
        display: flex;
        gap: 40px;
        flex-wrap: wrap;
    }
    .hero-stat-item .num {
        font-family: var(--font-serif);
        font-size: 28px;
        font-weight: 700;
        color: var(--ink);
        display: block;
        line-height: 1.2;
    }
    .hero-stat-item .txt {
        font-size: 13px;
        color: var(--text-muted);
    }
    .hero-visual-card {
        max-width: 380px;
        width: 100%;
        background: var(--surface-white);
        border-radius: var(--radius);
        overflow: hidden;
        box-shadow: var(--shadow-lite);
        border: 1px solid var(--line);
    }
    .hero-visual-card img {
        height: 220px;
        object-fit: cover;
        width: 100%;
    }
    .hero-visual-card .captions {
        padding: 18px 20px 22px;
        font-size: 14px;
        color: var(--text-secondary);
        line-height: 1.8;
        border-top: 0;
    }
    .hero-visual-card .tag {
        font-size: 12px;
        color: var(--primary-accent);
        border: 1px solid rgba(165, 42, 42, 0.3);
        padding: 2px 10px;
        border-radius: 20px;
        display: inline-block;
        margin-bottom: 10px;
        font-weight: 500;
    }

    /* ===== Section Common ===== */
    .section-block {
        padding: var(--section-space) 0;
    }
    .section-label {
        font-size: 14px;
        font-weight: 600;
        letter-spacing: .12em;
        text-transform: uppercase;
        color: var(--primary-accent);
        margin-bottom: 14px;
        display: block;
    }
    .section-title {
        font-size: 38px;
        font-weight: 700;
        color: var(--ink);
        line-height: 1.3;
        letter-spacing: .02em;
        margin-bottom: 16px;
    }
    .section-lead {
        font-size: 17px;
        color: var(--text-secondary);
        line-height: 1.9;
        max-width: 720px;
    }
    .divider-line {
        height: 1px;
        background: var(--line);
        border: 0;
        margin: 0;
    }

    /* ===== Solution 01: Problems ===== */
    .sol-intro {
        background: var(--surface-white);
    }
    .split-two {
        display: flex;
        gap: 70px;
        align-items: flex-start;
    }
    .split-left {
        flex: 0 0 38%;
        position: sticky;
        top: 110px;
    }
    .split-right {
        flex: 1;
    }
    .prob-list {
        list-style: none;
        margin: 0;
        padding: 0;
        border-top: 1px solid var(--line);
    }
    .prob-list li {
        padding: 28px 0;
        border-bottom: 1px solid var(--line);
        display: flex;
        gap: 24px;
        align-items: flex-start;
    }
    .prob-list .p-num {
        font-family: var(--font-serif);
        font-size: 17px;
        color: var(--bronze);
        font-weight: 600;
        line-height: 1.4;
        flex: 0 0 50px;
    }
    .prob-list .p-body strong {
        font-size: 17px;
        font-weight: 600;
        color: var(--ink);
        display: block;
        margin-bottom: 6px;
        font-family: var(--font-serif);
    }
    .prob-list .p-body p {
        font-size: 15px;
        color: var(--text-secondary);
        line-height: 1.8;
        max-width: 660px;
    }

    /* ===== Solution 02: Diagram / Flow ===== */
    .sol-flow {
        background: var(--bg-warm);
    }
    .flow-frame {
        background: var(--surface-white);
        border: 1px solid var(--line);
        border-radius: var(--radius);
        padding: 46px 44px;
    }
    .flow-grid {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 20px;
        flex-wrap: wrap;
        margin-top: 16px;
    }
    .flow-item {
        flex: 1;
        min-width: 160px;
        text-align: left;
        position: relative;
        padding-left: 20px;
    }
    .flow-item::before {
        content: attr(data-step);
        position: absolute;
        top: 0;
        left: 0;
        font-size: 12px;
        color: var(--primary-accent);
        font-weight: 700;
    }
    .flow-item h3 {
        font-size: 20px;
        font-weight: 700;
        margin-bottom: 8px;
        margin-top: 22px;
        letter-spacing: .02em;
    }
    .flow-item p {
        font-size: 14px;
        color: var(--text-secondary);
        line-height: 1.8;
    }
    .flow-arrow {
        color: var(--bronze);
        font-size: 22px;
        font-weight: 300;
        flex-shrink: 0;
        padding-bottom: 30px;
    }

    /* ===== Solution 03: Scenes with visual alternating ===== */
    .sol-scenes {
        background: var(--surface-white);
    }
    .scene-block {
        display: flex;
        align-items: center;
        gap: 70px;
        padding: 34px 0;
    }
    .scene-block + .scene-block {
        border-top: 1px solid var(--line);
    }
    .scene-visual {
        flex: 0 0 46%;
        max-width: 560px;
    }
    .scene-visual img {
        width: 100%;
        height: 400px;
        object-fit: cover;
        border-radius: var(--radius);
        border: 1px solid var(--line);
    }
    .scene-content {
        flex: 1;
    }
    .scene-content .scene-label {
        font-size: 14px;
        font-weight: 600;
        color: var(--primary-accent);
        margin-bottom: 10px;
        display: block;
        letter-spacing: .06em;
    }
    .scene-content h3 {
        font-size: 28px;
        font-weight: 700;
        margin-bottom: 16px;
        letter-spacing: .02em;
    }
    .scene-content p {
        font-size: 15px;
        color: var(--text-secondary);
        margin-bottom: 22px;
        line-height: 1.9;
    }
    .scene-points {
        list-style: none;
        padding: 0;
        margin: 0 0 24px;
    }
    .scene-points li {
        padding: 7px 0;
        font-size: 15px;
        color: var(--ink);
        display: flex;
        gap: 12px;
        align-items: baseline;
    }
    .scene-points li::before {
        content: '';
        width: 6px;
        height: 6px;
        background: var(--primary-accent);
        border-radius: 50%;
        flex: 0 0 6px;
        position: relative;
        top: -2px;
    }
    .reverse-row {
        flex-direction: row-reverse;
    }

    /* ===== Solution 04: Result / data ===== */
    .sol-proof {
        background: var(--bg-warm);
    }
    .proof-grid {
        display: flex;
        gap: 74px;
        align-items: center;
    }
    .proof-left {
        flex: 1;
        max-width: 620px;
    }
    .proof-quote {
        border-left: 3px solid var(--bronze);
        padding: 8px 0 8px 32px;
        font-family: var(--font-serif);
        font-size: 22px;
        line-height: 1.7;
        color: var(--ink);
        letter-spacing: .01em;
    }
    .proof-quote small {
        display: block;
        font-size: 14px;
        color: var(--text-secondary);
        line-height: 1.8;
        margin-top: 20px;
        font-family: var(--font-sans);
    }
    .proof-right {
        flex: 0 0 36%;
        display: flex;
        flex-direction: column;
        gap: 18px;
    }
    .proof-card {
        background: var(--surface-white);
        border: 1px solid var(--line);
        padding: 28px 30px;
        border-radius: var(--radius);
    }
    .proof-card .stats-num {
        font-family: var(--font-serif);
        font-size: 42px;
        color: var(--ink);
        font-weight: 700;
        line-height: 1.2;
        display: block;
        margin-bottom: 8px;
    }
    .proof-card .stats-num .accent {
        color: var(--primary-accent);
    }
    .proof-card p {
        font-size: 14px;
        color: var(--text-secondary);
    }
    .proof-card .thumb {
        font-size: 13px;
        color: var(--text-muted);
        font-weight: 400;
        margin-bottom: 4px;
    }

    /* ===== Solution 05: suitable ===== */
    .sol-fit {
        background: var(--surface-white);
    }
    .fit-grid {
        display: flex;
        gap: 32px;
        flex-wrap: wrap;
        margin-top: 28px;
    }
    .fit-col {
        list-style: none;
        flex: 1 1 300px;
        border: 1px solid var(--line);
        background: var(--bg-warm);
        border-radius: var(--radius);
        padding: 28px 30px;
        transition: transform .3s, box-shadow .3s;
        margin: 0;
    }
    .fit-col:hover {
        transform: translateY(-3px);
        box-shadow: var(--shadow-lite);
    }
    .fit-col li {
        font-size: 15px;
        color: var(--text-secondary);
        padding: 12px 0;
        border-bottom: 1px solid var(--line);
        display: flex;
        gap: 10px;
        align-items: flex-start;
        list-style: none;
    }
    .fit-col li:last-child {
        border-bottom: 0;
    }
    .fit-col li::before {
        content: '—';
        color: var(--primary-accent);
        flex: 0 0 auto;
    }
    .fit-col .col-title {
        font-family: var(--font-serif);
        font-size: 21px;
        font-weight: 700;
        color: var(--ink);
        padding: 0 0 18px 0;
        border-bottom: 1px solid var(--line);
        display: block;
        margin-bottom: 10px;
    }
    .fit-col .col-title::before {
        display: none;
    }

    /* ===== Solution 06: Process ===== */
    .sol-process {
        background: var(--bg-warm);
    }
    .process-timeline {
        list-style: none;
        border-left: 1px solid var(--line-deep);
        margin: 48px 0 0;
        padding-left: 42px;
    }
    .process-timeline > li {
        position: relative;
        padding-bottom: 44px;
    }
    .process-timeline > li:last-child {
        padding-bottom: 0;
    }
    .process-timeline > li::before {
        content: '';
        position: absolute;
        left: -47px;
        top: 8px;
        width: 10px;
        height: 10px;
        border-radius: 50%;
        background: var(--primary-accent);
        border: 2px solid var(--bg-warm);
        box-shadow: 0 0 0 1px var(--primary-accent);
    }
    .process-phase {
        font-size: 13px;
        font-weight: 600;
        color: var(--bronze);
        letter-spacing: .1em;
        margin-bottom: 6px;
        display: block;
        text-transform: uppercase;
    }
    .process-timeline h3 {
        font-size: 23px;
        margin-bottom: 8px;
        font-weight: 700;
    }
    .process-timeline p {
        font-size: 15px;
        color: var(--text-secondary);
        line-height: 1.8;
        max-width: 760px;
        margin-top: 8px;
    }

    /* ===== Solution 07: Tools matrix / scenario list ===== */
    .sol-toolkit {
        background: var(--surface-white);
    }
    .tool-grid {
        display: flex;
        gap: 0;
        flex-wrap: wrap;
        margin-top: 36px;
        border-top: 1px solid var(--line);
        border-left: 1px solid var(--line);
    }
    .tool-cell {
        flex: 1 1 30%;
        border-right: 1px solid var(--line);
        border-bottom: 1px solid var(--line);
        padding: 30px 28px;
        background: var(--surface-white);
        min-width: 220px;
        transition: background .2s ease;
    }
    .tool-cell:hover {
        background: var(--hover-bg);
    }
    .tool-cell .t-icon {
        color: var(--primary-accent);
        font-size: 24px;
        margin-bottom: 14px;
        display: block;
    }
    .tool-cell h3 {
        font-size: 18px;
        font-weight: 700;
        margin-bottom: 8px;
        font-family: var(--font-serif);
    }
    .tool-cell p {
        font-size: 14px;
        color: var(--text-secondary);
        line-height: 1.8;
    }

    /* ===== FAQ ===== */
    .sol-faq {
        background: var(--bg-warm);
    }
    .faq-columns {
        display: flex;
        gap: 70px;
        align-items: flex-start;
    }
    .faq-left {
        flex: 0 0 28%;
        position: sticky;
        top: 110px;
    }
    .faq-contact {
        margin-top: 18px;
        display: flex;
        flex-direction: column;
        gap: 12px;
    }
    .faq-right {
        flex: 1;
    }
    .accordion-item {
        border-bottom: 1px solid var(--line);
    }
    .accordion-item:first-child {
        border-top: 1px solid var(--line);
    }
    .accordion-item button {
        background: none;
        border: 0;
        width: 100%;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 30px;
        text-align: left;
        padding: 22px 0;
        cursor: pointer;
        font-size: 17px;
        font-weight: 600;
        color: var(--ink);
        line-height: 1.5;
        letter-spacing: .01em;
        min-height: 48px;
        border: 0 !important;
    }
    .accordion-item button:hover {
        color: var(--primary-accent);
    }
    .accordion-item .icon-faq {
        position: relative;
        width: 18px;
        height: 18px;
        flex: 0 0 18px;
    }
    .accordion-item .icon-faq::before,
    .accordion-item .icon-faq::after {
        content: '';
        position: absolute;
        background: var(--text-secondary);
        transition: background .2s, transform .3s ease;
        border-radius: 2px;
    }
    .accordion-item .icon-faq::before {
        width: 18px;
        height: 2px;
        top: 8px;
        left: 0;
    }
    .accordion-item .icon-faq::after {
        width: 2px;
        height: 18px;
        left: 8px;
        top: 0;
        transition: transform .3s ease, opacity .3s ease, background .2s;
    }
    .accordion-item button[aria-expanded="true"] .icon-faq::after {
        transform: scaleY(0);
        opacity: .6;
    }
    .accordion-item .faq-answer {
        max-height: 0;
        overflow: hidden;
        transition: max-height .35s ease;
    }
    .accordion-item .faq-answer p {
        padding-bottom: 22px;
        font-size: 15px;
        color: var(--text-secondary);
        line-height: 1.9;
        max-width: 760px;
    }
    .accordion-item .faq-answer-inner {
        padding-right: 20px;
    }

    /* ===== Cross link area ===== */
    .rel-block {
        background: var(--surface-white);
        border-top: 1px solid var(--line);
        border-bottom: 1px solid var(--line);
    }
    .rel-card-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 50px;
        flex-wrap: wrap;
    }
    .rel-card-inner p {
        font-size: 18px;
        color: var(--ink);
        font-family: var(--font-serif);
        max-width: 600px;
        line-height: 1.7;
    }
    .rel-card-inner .rel-links {
        display: flex;
        gap: 16px;
        flex-wrap: wrap;
    }

    /* ===== CTA ===== */
    .sol-cta {
        background: #21201C;
        color: #F7F5F0;
        padding: 72px 0;
    }
    .sol-cta .cta-wrap {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 48px;
    }
    .sol-cta h2 {
        font-size: 34px;
        color: #F7F5F0;
        margin-bottom: 10px;
    }
    .sol-cta p {
        font-size: 16px;
        color: rgba(247, 245, 240, .75);
        max-width: 580px;
    }
    .btn-cta-light {
        background: #FFFFFF;
        color: #1B1A17;
        font-weight: 700;
        border: 1px solid transparent;
    }
    .btn-cta-light:hover {
        background: var(--primary-accent);
        color: #fff;
        border-color: var(--primary-accent);
    }
    .btn-cta-outline-light {
        background: transparent;
        border: 1px solid rgba(247, 245, 240, .35);
        color: rgba(247, 245, 240, .85);
    }
    .btn-cta-outline-light:hover {
        border-color: #fff;
        color: #fff;
    }
    .cta-btn-group {
        display: flex;
        gap: 16px;
        flex-wrap: wrap;
    }

    /* ===== Footer ===== */
    .site-footer {
        background: #141310;
        color: #BFB9B0;
        padding-top: 72px;
        font-size: 14px;
    }
    .footer-top {
        display: flex;
        gap: 60px;
        flex-wrap: wrap;
        padding-bottom: 52px;
        border-bottom: 1px solid rgba(247, 245, 240, .1);
    }
    .footer-brand-col {
        flex: 1 1 300px;
        max-width: 360px;
    }
    .footer-brand-col .site-logo {
        color: #F7F5F0;
        margin-bottom: 18px;
    }
    .footer-brand-col .site-logo .logo-en,
    .footer-brand-col .site-logo .logo-cn {
        color: #F7F5F0;
    }
    .footer-brand-desc {
        color: #9C9588;
        line-height: 1.9;
        font-size: 14px;
    }
    .footer-cols {
        flex: 2;
        display: flex;
        gap: 48px;
        justify-content: flex-end;
        flex-wrap: wrap;
    }
    .footer-col {
        min-width: 140px;
    }
    .footer-col h4 {
        color: #F7F5F0;
        font-size: 15px;
        margin-bottom: 20px;
        font-weight: 600;
        letter-spacing: .02em;
        font-family: var(--font-sans);
    }
    .footer-col ul {
        list-style: none;
        padding: 0;
        display: flex;
        flex-direction: column;
        gap: 10px;
    }
    .footer-col ul a {
        color: #8E887E;
        font-size: 14px;
        line-height: 1.7;
    }
    .footer-col ul a:hover {
        color: #FFFFFF;
    }
    .footer-bottom {
        border-top: 1px solid rgba(247, 245, 240, .07);
        padding: 22px 0;
        font-size: 13px;
    }
    .footer-bottom-inner {
        display: flex;
        justify-content: space-between;
        align-items: center;
        gap: 20px;
        flex-wrap: wrap;
        color: #6E6962;
    }
    .footer-bottom a {
        color: #989187;
    }
    .footer-bottom a:hover {
        color: var(--primary-accent);
    }

    /* ===== Floating CTA ===== */
    .float-cta {
        position: fixed;
        right: 28px;
        bottom: 30px;
        z-index: 90;
        opacity: 0;
        visibility: hidden;
        transform: translateY(14px);
        transition: opacity .35s ease, transform .35s ease, visibility .35s;
    }
    .float-cta.show {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }
    .float-cta a {
        background: var(--ink);
        color: #fff;
        padding: 12px 28px;
        border-radius: 40px;
        font-size: 14px;
        font-weight: 600;
        display: inline-flex;
        align-items: center;
        gap: 8px;
        box-shadow: 0 6px 24px rgba(0, 0, 0, .08);
        transition: background .3s ease;
    }
    .float-cta a:hover {
        background: var(--primary-accent);
    }

    /* ===== Responsive ===== */
    @media (max-width: 1024px) {
        :root {
            --section-space: 74px;
        }
        .split-two {
            flex-direction: column;
            gap: 38px;
        }
        .split-left {
            position: relative;
            top: auto;
            flex: auto;
        }
        .split-left .section-lead {
            max-width: 100%;
        }
        .site-header .nav-links,
        .site-header .header-cta .btn-subtle {
            display: none;
        }
        .site-header {
            position: sticky;
            top: 0;
        }
        .nav-toggle {
            display: block;
            margin-left: auto;
        }
        .header-cta .nav-cta-btn{
            display: none;
        }
        .mobile-nav-open {
            display: flex;
            flex-direction: column;
            position: absolute;
            top: 78px;
            left: 0;
            right: 0;
            background: #F7F5F0;
            z-index: 120;
            padding: 30px 32px 36px;
            border-bottom: 1px solid var(--line);
            gap: 20px;
            box-shadow: 0 30px 40px rgba(0,0,0,0.05);
            align-items: flex-start;
        }
        .mobile-nav-open .nav-links {
            display: flex;
            flex-direction: column;
            gap: 16px;
            align-items: stretch;
        }
        .mobile-nav-open .nav-links a {
            font-size: 24px;
            line-height: 1.6;
            font-weight: 500;
        }
        .mobile-nav-open .header-cta {
            display: flex;
            width: 100%;
            justify-content: flex-start;
        }
        .mobile-nav-open .header-cta .btn-subtle {
            display: none;
        }
        .header-cta {
            display: flex;
            align-items: center;
        }
        .header-cta .btn {
            margin-right: 4px;
        }
        .solution-hero {
            padding: 90px 0 60px;
        }
        .solution-hero .hero-inner {
            flex-direction: column;
            gap: 36px;
        }
        .hero-left {
            flex: 1;
            max-width: 100%;
        }
        .hero-right {
            flex: 0 0 auto;
            width: 100%;
        }
        .hero-visual-card {
            max-width: 100%;
        }
        .hero-visual-card img {
            height: 310px;
        }
        .scene-block, .reverse-row {
            flex-direction: column;
            gap: 30px;
        }
        .scene-visual {
            flex: auto;
            max-width: 100%;
            width: 100%;
        }
        .proof-grid {
            flex-direction: column;
            gap: 46px;
        }
        .proof-right {
            flex: auto;
            width: 100%;
            display: grid;
            grid-template-columns: 1fr 1fr;
        }
        .tool-cell {
            flex-basis: 48%;
        }
        .faq-columns {
            flex-direction: column;
            gap: 36px;
        }
        .faq-left {
            position: static;
            width: 100%;
            flex: auto;
        }
        .sol-cta .cta-wrap {
            flex-direction: column;
            align-items: flex-start;
        }
    }

    @media (max-width: 768px) {
        :root {
            --section-space: 54px;
        }
        .container-custom {
            padding-left: 20px;
            padding-right: 20px;
        }
        .header-inner {
            height: 66px;
        }
        .site-logo, .logo-en {
            font-size: 26px;
        }
        .logo-cn {
            font-size: 22px;
        }
        .solution-hero h1 {
            font-size: 34px;
        }
        .solution-hero .hero-desc {
            font-size: 16px;
        }
        .section-title {
            font-size: 28px;
        }
        .hero-stat-row {
            gap: 28px;
        }
        .crumb {
            font-size: 13px;
        }
        .flow-item {
            flex: 1 1 100%;
            padding-left: 14px;
        }
        .flow-item::before {
            position: static;
            display: block;
            margin-bottom: 14px;
        }
        .flow-grid {
            gap: 26px;
        }
        .flow-arrow {
            display: none;
        }
        .flow-frame {
            padding: 30px 22px;
        }
        .scene-visual img {
            height: 260px;
        }
        .proof-right {
            display: flex;
            flex-direction: column;
            gap: 18px;
        }
        .proof-card {
            padding: 22px;
        }
        .tool-cell {
            flex-basis: 100%;
        }
        .process-timeline {
            padding-left: 30px;
        }
        .process-timeline > li::before {
            left: -35px;
        }
        .sol-cta h2 {
            font-size: 24px;
        }
        .cta-btn-group {
            width: 100%;
            flex-direction: column;
            align-items: stretch;
        }
        .cta-btn-group .btn {
            width: 100%;
        }
        .footer-top {
            flex-direction: column;
            gap: 40px;
        }
        .footer-cols {
            justify-content: flex-start;
            gap: 24px;
        }
        .footer-bottom-inner {
            flex-direction: column;
            align-items: flex-start;
        }
        .float-cta {
            right: 16px;
            bottom: 16px;
        }
        .float-cta a {
            padding: 10px 18px;
            font-size: 13px;
        }
        .rel-card-inner {
            flex-direction: column;
            align-items: flex-start;
        }
    }

    @media (max-width: 520px) {
        .solution-hero h1 {
            font-size: 30px;
        }
        .solution-hero .hero-desc {
            font-size: 15px;
            line-height: 1.8;
        }
        .hero-btns {
            flex-direction: column;
            align-items: stretch;
        }
        .hero-btns .btn {
            width: 100%;
        }
        .section-title {
            font-size: 25px;
        }
        .section-lead {
            font-size: 15px;
        }
        .prob-list li {
            gap: 16px;
        }
        .prob-list .p-num {
            flex: 0 0 34px;
        }
        .fit-col {
            padding: 22px;
        }
        .tool-cell {
            padding: 22px 18px;
        }
        .sol-cta {
            padding: 50px 0;
        }
    }

    @media (min-width: 1025px) {
        .mobile-nav-open {
            display: none !important;
        }
    }