/* roulang page: index */
:root {
        --paper: #f5f0e8;
        --paper-soft: #fbf8f3;
        --card: #ffffff;
        --ink: #2b2520;
        --ink-soft: #665c53;
        --line: rgba(43, 37, 32, 0.13);
        --accent: #a4552c;
        --accent-dark: #85411e;
        --accent-soft: #eedccd;
        --copper: #e09268;
        --night: #1d1712;
        --night-soft: #2e241d;
        --radius-card: 12px;
        --radius-btn: 8px;
        --shadow-sm: 0 10px 30px rgba(30, 20, 10, .06);
        --shadow-hover: 0 18px 40px rgba(30, 20, 10, .12);
        --ease: cubic-bezier(.22, .61, .36, 1);
    }

    * {
        box-sizing: border-box;
    }

    html {
        scroll-behavior: smooth;
    }

    body {
        margin: 0;
        font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", system-ui, sans-serif;
        background: var(--paper);
        color: var(--ink);
        line-height: 1.8;
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }

    body.menu-open {
        overflow: hidden;
    }

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

    a {
        color: var(--accent);
        text-decoration: none;
        transition: color .25s var(--ease);
    }

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

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

    :focus-visible {
        outline: 3px solid rgba(164, 85, 44, .45);
        outline-offset: 3px;
        border-radius: 4px;
    }

    .container {
        max-width: 1240px;
    }

    .index-section {
        padding: clamp(72px, 8vw, 128px) 0;
        scroll-margin-top: 96px;
    }

    .eyebrow {
        display: inline-flex;
        align-items: center;
        gap: 10px;
        font-size: 13px;
        letter-spacing: .18em;
        text-transform: uppercase;
        color: var(--accent);
        font-weight: 600;
        margin-bottom: 16px;
    }

    .eyebrow::before {
        content: "";
        width: 24px;
        height: 2px;
        background: var(--accent);
    }

    .section-title {
        font-size: clamp(1.9rem, 3.4vw, 2.9rem);
        line-height: 1.2;
        font-weight: 800;
        margin: 0 0 18px;
        letter-spacing: -.01em;
    }

    .section-lead {
        color: var(--ink-soft);
        font-size: 17px;
        line-height: 1.85;
        max-width: 720px;
        margin: 0;
    }

    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        font-weight: 600;
        border-radius: var(--radius-btn);
        padding: 12px 24px;
        font-size: 15px;
        transition: transform .25s var(--ease), box-shadow .25s var(--ease), background .25s, color .25s, border-color .25s;
        border: 1px solid transparent;
        white-space: nowrap;
    }

    .btn:hover {
        color: inherit;
        transform: translateY(-2px);
    }

    .btn:active {
        transform: translateY(0) scale(.98);
    }

    .btn-theme {
        background: var(--accent);
        color: #fff;
        border-color: var(--accent);
        box-shadow: 0 8px 22px rgba(164, 85, 44, .18);
    }

    .btn-theme:hover {
        background: var(--accent-dark);
        border-color: var(--accent-dark);
        color: #fff;
        box-shadow: 0 14px 30px rgba(164, 85, 44, .24);
    }

    .btn-outline-light {
        background: transparent;
        border-color: rgba(255, 255, 255, .65);
        color: #fff;
    }

    .btn-outline-light:hover {
        background: rgba(255, 255, 255, .12);
        color: #fff;
        border-color: #fff;
    }

    .btn-outline {
        border-color: rgba(43, 37, 32, .32);
        color: var(--ink);
    }

    .btn-outline:hover {
        border-color: var(--accent);
        color: var(--accent);
        background: rgba(164, 85, 44, .05);
    }

    .js .reveal {
        opacity: 0;
        transform: translateY(22px);
        transition: opacity .65s var(--ease), transform .65s var(--ease);
    }

    .js .reveal.in-view {
        opacity: 1;
        transform: none;
    }

    .site-header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 1035;
        color: #fff;
        transition: background .35s var(--ease), box-shadow .35s var(--ease), color .35s var(--ease);
        background: transparent;
    }

    .site-header.is-scrolled {
        background: rgba(251, 248, 243, .94);
        color: var(--ink);
        box-shadow: 0 12px 40px rgba(0, 0, 0, .08);
        border-bottom: 1px solid var(--line);
    }

    .header-row {
        min-height: 84px;
        display: flex;
        align-items: center;
        gap: 28px;
        position: relative;
        z-index: 2;
    }

    .brand {
        font-size: 19px;
        font-weight: 800;
        color: inherit;
        letter-spacing: .02em;
        display: inline-flex;
        align-items: center;
        gap: 10px;
        flex: 0 0 auto;
    }

    .brand::before {
        content: "";
        width: 9px;
        height: 24px;
        border-radius: 4px;
        background: var(--copper);
    }

    .brand:hover {
        color: inherit;
    }

    .desktop-nav {
        margin-left: auto;
    }

    .desktop-nav-list {
        display: flex;
        align-items: center;
        gap: 34px;
        margin: 0;
        padding: 0;
        list-style: none;
    }

    .desktop-nav-link {
        display: inline-flex;
        align-items: center;
        position: relative;
        font-size: 15px;
        font-weight: 600;
        color: inherit;
        padding: 10px 0 6px;
    }

    .desktop-nav-link::after {
        content: "";
        position: absolute;
        left: 0;
        right: 100%;
        bottom: 0;
        height: 2px;
        background: rgba(255, 255, 255, .9);
        transition: right .3s var(--ease);
    }

    .desktop-nav-link:hover {
        color: inherit;
    }

    .desktop-nav-link:hover::after,
    .desktop-nav-link.active::after {
        right: 0;
    }

    .site-header.is-scrolled .desktop-nav-link::after {
        background: var(--accent);
    }

    .btn-header {
        border: 1px solid rgba(255, 255, 255, .56);
        color: #fff;
        background: transparent;
        padding: 9px 20px;
        border-radius: var(--radius-btn);
        font-weight: 600;
        transition: background .25s, color .25s, transform .25s var(--ease), border-color .25s;
    }

    .btn-header:hover {
        background: rgba(255, 255, 255, .16);
        color: #fff;
        transform: translateY(-2px);
    }

    .site-header.is-scrolled .btn-header {
        border-color: rgba(43, 37, 32, .25);
        color: var(--ink);
    }

    .site-header.is-scrolled .btn-header:hover {
        background: rgba(164, 85, 44, .09);
        border-color: var(--accent);
        color: var(--accent);
    }

    .menu-toggle {
        display: none;
        background: none;
        border: 0;
        padding: 10px;
        margin-left: auto;
        color: inherit;
        cursor: pointer;
    }

    .menu-toggle-box {
        display: flex;
        flex-direction: column;
        justify-content: center;
        gap: 5px;
        width: 24px;
        height: 24px;
    }

    .menu-toggle-box span {
        display: block;
        height: 2px;
        width: 100%;
        background: currentColor;
        transition: transform .3s var(--ease), opacity .3s;
        border-radius: 2px;
    }

    .nav-scrim {
        position: fixed;
        inset: 0;
        z-index: 1043;
        background: rgba(25, 18, 14, .48);
        opacity: 0;
        visibility: hidden;
        transition: opacity .35s, visibility .35s;
    }

    body.menu-open .nav-scrim {
        opacity: 1;
        visibility: visible;
    }

    .mobile-drawer {
        position: fixed;
        top: 0;
        right: 0;
        bottom: 0;
        width: min(340px, 88vw);
        background: var(--paper-soft);
        z-index: 1045;
        transform: translateX(100%);
        transition: transform .45s var(--ease);
        padding: 30px 30px 40px;
        overflow: auto;
    }

    body.menu-open .mobile-drawer {
        transform: none;
    }

    .mobile-drawer-head {
        display: flex;
        align-items: center;
        justify-content: space-between;
        margin-bottom: 38px;
    }

    .drawer-close {
        background: rgba(43, 37, 32, .08);
        border: 0;
        border-radius: 8px;
        padding: 8px 12px;
        font-size: 14px;
        color: var(--ink-soft);
        cursor: pointer;
    }

    .drawer-close:hover {
        background: rgba(43, 37, 32, .14);
        color: var(--ink);
    }

    .mobile-nav-list {
        list-style: none;
        margin: 0;
        padding: 0;
        display: flex;
        flex-direction: column;
        gap: 4px;
    }

    .mobile-nav-list a {
        display: block;
        padding: 14px 8px;
        color: var(--ink);
        font-size: 17px;
        font-weight: 600;
        border-bottom: 1px solid var(--line);
    }

    .mobile-nav-list a:hover,
    .mobile-nav-list a.active {
        color: var(--accent);
    }

    .drawer-cta {
        margin-top: 34px;
        width: 100%;
    }

    .hero {
        position: relative;
        width: 100%;
        min-height: 100vh;
        min-height: 100svh;
        display: flex;
        align-items: center;
        padding: 150px 0 90px;
        background-position: center;
        background-size: cover;
        background-repeat: no-repeat;
        color: #fff;
    }

    .hero::before {
        content: "";
        position: absolute;
        inset: 0;
        background: linear-gradient(180deg, rgba(29, 23, 18, .18), rgba(29, 23, 18, .36) 70%, rgba(29, 23, 18, .66));
        pointer-events: none;
    }

    .hero-inner {
        position: relative;
        z-index: 2;
        max-width: 900px;
    }

    .hero-eyebrow {
        display: inline-flex;
        align-items: center;
        gap: 12px;
        font-size: 13px;
        letter-spacing: .2em;
        margin-bottom: 22px;
        color: rgba(255, 255, 255, .86);
        font-weight: 600;
        animation: heroRise .75s var(--ease) both;
        animation-delay: .05s;
    }

    .hero-eyebrow::before {
        content: "";
        width: 28px;
        height: 2px;
        background: var(--copper);
    }

    .hero h1 {
        font-size: clamp(2.45rem, 6vw, 4.6rem);
        line-height: 1.15;
        font-weight: 850;
        margin: 0 0 24px;
        letter-spacing: -.015em;
        color: #fff;
        animation: heroRise .75s var(--ease) both;
        animation-delay: .18s;
    }

    .hero-sub {
        font-size: clamp(1.02rem, 1.5vw, 1.22rem);
        line-height: 1.85;
        max-width: 700px;
        color: rgba(255, 255, 255, .86);
        margin-bottom: 34px;
        animation: heroRise .75s var(--ease) both;
        animation-delay: .32s;
    }

    .hero-actions {
        display: flex;
        flex-wrap: wrap;
        gap: 14px;
        animation: heroRise .75s var(--ease) both;
        animation-delay: .45s;
    }

    .hero-scroll {
        position: absolute;
        bottom: 34px;
        left: 50%;
        transform: translateX(-50%);
        z-index: 2;
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 8px;
        font-size: 12px;
        letter-spacing: .16em;
        color: rgba(255, 255, 255, .72);
        animation: heroRise .75s var(--ease) both;
        animation-delay: .6s;
    }

    .hero-scroll::after {
        content: "";
        width: 1px;
        height: 36px;
        background: rgba(255, 255, 255, .66);
    }

    @keyframes heroRise {
        from {
            opacity: 0;
            transform: translateY(18px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    .service-layout {
        display: grid;
        grid-template-columns: 370px 1fr;
        gap: 62px;
        align-items: start;
    }

    .service-fixed {
        position: sticky;
        top: 132px;
    }

    .service-fixed .lead {
        margin-bottom: 28px;
        color: var(--ink-soft);
        font-size: 16px;
    }

    .browse-list {
        list-style: none;
        margin: 0;
        padding: 0;
        border-top: 3px solid var(--ink);
    }

    .browse-item {
        border-bottom: 1px solid var(--line);
        transition: background .25s;

    }

    .browse-item:hover {
        background: rgba(164, 85, 44, .04);
    }

    .browse-item-link {
        display: grid;
        grid-template-columns: 56px 1fr auto;
        gap: 22px;
        align-items: center;
        padding: 30px 12px 30px 8px;
        color: var(--ink);
    }

    .browse-item-link:hover {
        color: var(--ink);
    }

    .browse-num {
        font-size: 15px;
        font-weight: 700;
        color: var(--ink-soft);
        transition: color .25s;
    }

    .browse-item:hover .browse-num {
        color: var(--accent);
    }

    .browse-item h3 {
        margin: 0 0 4px;
        font-size: 19px;
        font-weight: 700;
    }

    .browse-item p {
        margin: 0;
        color: var(--ink-soft);
        font-size: 15px;
    }

    .browse-more {
        font-size: 14px;
        font-weight: 600;
        display: inline-flex;
        align-items: center;
        gap: 6px;
        color: var(--accent);
        white-space: nowrap;
    }

    .stats-band {
        background: var(--night);
        color: #fff;
        padding: 86px 0 92px;
    }

    .stats-band .eyebrow::before,
    .stats-head {
        color: var(--copper);
    }

    .stats-intro {
        color: rgba(255, 255, 255, .42);
        margin: 0 0 26px;
    }

    .stats-row {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        border-top: 1px solid rgba(255, 255, 255, .16);
    }

    .stat-item {
        padding: 34px 26px 4px;
        border-left: 1px solid rgba(255, 255, 255, .13);
    }

    .stat-item:first-child {
        border-left: 0;
    }

    .stat-number {
        font-size: clamp(36px, 4vw, 56px);
        font-weight: 800;
        line-height: 1;
        font-variant-numeric: tabular-nums;
        color: #fff;
        letter-spacing: -.02em;
    }

    .stat-unit {
        font-size: 20px;
        color: var(--copper);
        margin-left: 4px;
        font-weight: 700;
    }

    .stat-label {
        color: rgba(255, 255, 255, .56);
        font-size: 14px;
        letter-spacing: .06em;
        margin-top: 12px;
    }

    .scenario-wrap .section-title {
        max-width: 480px;
    }

    .scenario-left {
        display: flex;
        flex-direction: column;
        align-items: flex-start;
        height: 100%;
    }

    .scenario-left .lead {
        margin: 0 0 24px;
        color: var(--ink-soft);
    }

    .scenario-cards {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 22px;
    }

    .case-card {
        display: block;
        background: var(--card);
        border-radius: var(--radius-card);
        border: 1px solid rgba(43, 37, 32, .08);
        overflow: hidden;
        color: var(--ink);
        height: 100%;
        transition: box-shadow .35s var(--ease), transform .35s var(--ease), border-color .35s var(--ease);
    }

    .case-card:hover {
        color: var(--ink);
        transform: translateY(-4px);
        box-shadow: var(--shadow-hover);
        border-color: rgba(164, 85, 44, .32);
    }

    .case-media {
        display: block;
        overflow: hidden;
        background: #e6dfd4;
    }

    .case-media img {
        width: 100%;
        height: 220px;
        object-fit: cover;
        transition: transform .6s var(--ease);
    }

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

    .case-body {
        display: block;
        padding: 22px 24px 26px;
    }

    .case-body h3 {
        font-size: 17px;
        font-weight: 700;
        margin: 0 0 8px;
        line-height: 1.5;
    }

    .case-body p {
        font-size: 14px;
        color: var(--ink-soft);
        margin: 0;
        line-height: 1.85;
    }

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

    .news-list {
        margin-top: 42px;
        border-top: 2px solid var(--ink);
    }

    .news-row {
        border-bottom: 1px solid var(--line);
        transition: background .25s;
    }

    .news-row:hover {
        background: rgba(164, 85, 44, .04);
    }

    .news-row-link {
        display: grid;
        grid-template-columns: 180px 1fr auto;
        gap: 28px;
        align-items: center;
        padding: 24px 12px 24px 8px;
        color: var(--ink);
    }

    .news-row-link:hover {
        color: var(--ink);
    }

    .news-meta {
        display: flex;
        flex-direction: column;
        gap: 8px;
    }

    .news-tag {
        display: inline-flex;
        width: fit-content;
        padding: 3px 10px;
        border-radius: 50px;
        font-size: 12px;
        font-weight: 600;
        color: var(--accent);
        background: rgba(164, 85, 44, .09);
        letter-spacing: .03em;
    }

    .news-date {
        font-size: 14px;
        color: var(--ink-soft);
        font-variant-numeric: tabular-nums;
    }

    .news-title {
        font-size: 17px;
        font-weight: 700;
        margin: 0 0 6px;
        line-height: 1.55;
    }

    .news-summary {
        font-size: 15px;
        color: var(--ink-soft);
        margin: 0;
        line-height: 1.7;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
        position: relative;
    }

    .news-arrow {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 38px;
        height: 38px;
        border: 1px solid var(--line);
        border-radius: 50%;
        color: var(--accent);
        flex: none;
        transition: background .25s, border-color .25s, transform .3s var(--ease);
    }

    .news-row:hover .news-arrow {
        background: var(--accent);
        border-color: var(--accent);
        color: #fff;
        transform: translateX(4px);
    }

    .news-empty {
        border-bottom: 1px solid var(--line);
        padding: 62px 20px;
        text-align: center;
    }

    .news-empty .empty-text {
        color: var(--ink-soft);
        margin-bottom: 18px;
    }

    .solution-section {
        background: #fff;
    }

    .solution-tabs {
        border-bottom: 1px solid var(--line);
        display: flex;
        gap: 34px;
        padding: 0;
        margin-bottom: 44px;
    }

    .solution-tabs .nav-link {
        background: transparent;
        border: 0;
        border-radius: 0;
        color: var(--ink-soft);
        font-weight: 600;
        padding: 14px 2px 12px;
        position: relative;
        font-size: 16px;
        transition: color .25s;
    }

    .solution-tabs .nav-link::after {
        content: "";
        position: absolute;
        bottom: -1px;
        left: 0;
        width: 100%;
        height: 2px;
        background: var(--accent);
        transform: scaleX(0);
        transform-origin: left;
        transition: transform .3s var(--ease);
    }

    .solution-tabs .nav-link:hover,
    .solution-tabs .nav-link.active {
        color: var(--accent);
    }

    .solution-tabs .nav-link.active::after {
        transform: scaleX(1);
    }

    .solution-panel {
        display: grid;
        grid-template-columns: 380px 1fr;
        gap: 76px;
        align-items: center;
    }

    .solution-intro h3 {
        font-size: clamp(22px, 2.6vw, 30px);
        font-weight: 800;
        margin: 0 0 16px;
        line-height: 1.4;
    }

    .solution-intro p {
        color: var(--ink-soft);
        font-size: 16px;
        margin-bottom: 26px;
    }

    .solution-steps {
        position: relative;
        padding: 34px 34px 30px;
        background: var(--paper-soft);
        border-radius: var(--radius-card);
        border: 1px solid var(--line);
    }

    .step-item {
        display: flex;
        gap: 16px;
        padding: 14px 0;
        align-items: flex-start;
    }

    .step-index {
        width: 28px;
        height: 28px;
        border-radius: 50%;
        background: var(--accent);
        color: #fff;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        font-size: 13px;
        font-weight: 700;
        flex: 0 0 auto;
        margin-top: 3px;
    }

    .step-item h4 {
        margin: 0 0 3px;
        font-size: 16px;
        font-weight: 700;
    }

    .step-item p {
        margin: 0;
        color: var(--ink-soft);
        font-size: 14px;
    }

    .faq-band {
        max-width: 820px;
        margin: 0 auto;
    }

    .faq-heading {
        text-align: center;
        max-width: 640px;
        margin: 0 auto 48px;
    }

    .faq-heading .eyebrow {
        justify-content: center;
    }

    .faq-accordion .accordion-item {
        background: transparent;
        border: 0;
        border-top: 1px solid var(--line);
    }

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

    .faq-accordion .accordion-button {
        background: transparent;
        padding: 22px 46px 22px 0;
        font-size: 16px;
        font-weight: 700;
        color: var(--ink);
        box-shadow: none;
        border: 0;
        cursor: pointer;
        line-height: 1.6;
        transition: color .25s;
    }

    .faq-accordion .accordion-button:not(.collapsed) {
        color: var(--accent);
        background: transparent;
    }

    .faq-accordion .accordion-button:hover {
        color: var(--accent);
    }

    .faq-accordion .accordion-button::after {
        display: none;
    }

    .faq-accordion .accordion-button::before {
        content: "";
        position: absolute;
        right: 4px;
        top: 50%;
        width: 12px;
        height: 12px;
        margin-top: -6px;
        background:
            linear-gradient(var(--accent), var(--accent)) center / 12px 2px no-repeat,
            linear-gradient(var(--accent), var(--accent)) center / 2px 12px no-repeat;
        transition: transform .3s var(--ease);
    }

    .faq-accordion .accordion-button:not(.collapsed)::before {
        transform: rotate(45deg);
    }

    .faq-accordion .accordion-collapse {
        background: transparent;
    }

    .faq-accordion .accordion-body {
        padding: 0 64px 22px 0;
        color: var(--ink-soft);
        font-size: 15px;
        line-height: 1.85;
    }

    .contact-icon-card {
        background: var(--card);
        border-radius: 18px;
        box-shadow: var(--shadow-sm);
        overflow: hidden;
        border: 1px solid rgba(43, 37, 32, .07);
    }

    .contact-info-block {
        background: var(--night);
        color: #fff;
        height: 100%;
        padding: clamp(30px, 4vw, 50px);
        border-radius: 18px 0 0 18px;
        display: flex;
        flex-direction: column;
        justify-content: center;
    }

    .contact-info-block .eyebrow {
        color: var(--copper);
    }

    .contact-info-block .section-title {
        color: #fff;
        margin-bottom: 18px;
    }

    .contact-info-block p {
        color: rgba(255, 255, 255, .7);
        margin-bottom: 24px;
    }

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

    .contact-methods li {
        padding: 12px 0;
        border-top: 1px solid rgba(255, 255, 255, .14);
        display: flex;
        gap: 14px;
        align-items: center;
        font-size: 15px;
    }

    .contact-methods li:first-child {
        border-top: 0;
    }

    .contact-methods a {
        color: rgba(255, 255, 255, .88);
    }

    .contact-methods .label {
        color: var(--copper);
        letter-spacing: .08em;
        font-size: 13px;
        width: 70px;
        flex: 0 0 auto;
    }

    .contact-form-block {
        background: var(--paper-soft);
        border-radius: 0 18px 18px 0;
        height: 100%;
        padding: clamp(26px, 3.4vw, 46px);
    }

    .contact-form-block .form-note {
        font-size: 13px;
        color: var(--ink-soft);
        margin-bottom: 20px;
    }

    .contact-form-block .form-control-custom {
        height: 48px;
        border: 1px solid rgba(43, 37, 32, .16);
        border-radius: 8px;
        background: #fff;
        padding: 0 14px;
        font-size: 15px;
        color: var(--ink);
        width: 100%;
        transition: border-color .25s, box-shadow .25s;
    }

    .contact-form-block textarea.form-control-custom {
        height: 124px;
        padding-top: 13px;
        resize: vertical;
    }

    .contact-form-block .form-control-custom:focus {
        outline: 0;
        border-color: var(--accent);
        box-shadow: 0 0 0 3px rgba(164, 85, 44, .12);
    }

    .contact-form-block .form-label-required {
        color: var(--accent);
    }

    .contact-form-block .form-label {
        font-size: 14px;
        font-weight: 600;
        color: var(--ink);
        margin-bottom: 7px;
    }

    .footer {
        background: var(--night);
        color: rgba(255, 255, 255, .7);
        padding: 84px 0 30px;
    }

    .footer-topline {
        height: 2px;
        background: linear-gradient(90deg, var(--accent), transparent 40%);
        margin-bottom: 68px;
        border: 0;
    }

    .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr 1.3fr;
        gap: 44px;
        margin-bottom: 60px;
    }

    .footer .brand {
        color: #fff;
        font-size: 21px;
        margin-bottom: 15px;
    }

    .footer-about {
        font-size: 15px;
        line-height: 1.9;
        color: rgba(255, 255, 255, .58);
        margin-bottom: 20px;
        max-width: 360px;
    }

    .footer-title {
        font-size: 13px;
        color: rgba(255, 255, 255, .42);
        letter-spacing: .16em;
        margin-bottom: 18px;
        font-weight: 600;
    }

    .footer-list {
        list-style: none;
        margin: 0;
        padding: 0;
        display: flex;
        flex-direction: column;
        gap: 10px;
    }

    .footer-list a {
        color: rgba(255, 255, 255, .72);
        font-size: 15px;
    }

    .footer-list a:hover {
        color: var(--copper);
    }

    .footer-contact-list {
        list-style: none;
        margin: 0;
        padding: 0;
        font-size: 15px;
        display: flex;
        flex-direction: column;
        gap: 9px;
    }

    .footer-contact-list a {
        color: rgba(255, 255, 255, .7);
    }

    .footer-contact-list a:hover {
        color: var(--copper);
    }

    .footer-bottom {
        border-top: 1px solid rgba(255, 255, 255, .12);
        padding-top: 26px;
        display: flex;
        justify-content: space-between;
        align-items: center;
        flex-wrap: wrap;
        gap: 16px;
        font-size: 14px;
    }

    .footer-bottom a {
        color: rgba(255, 255, 255, .56);
        margin-left: 8px;
    }

    .footer-bottom a:hover {
        color: var(--copper);
    }

    .back-top {
        display: inline-flex;
        align-items: center;
        gap: 6px;
    }

    @media (max-width: 1199.98px) {
        .service-layout {
            grid-template-columns: 310px 1fr;
            gap: 36px;
        }

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

    @media (max-width: 991.98px) {
        .header-row {
            min-height: 74px;
        }

        .desktop-nav,
        .btn-header {
            display: none;
        }

        .menu-toggle {
            display: inline-flex;
        }

        .service-layout {
            grid-template-columns: 1fr;
        }

        .service-fixed {
            position: static;
        }

        .news-row-link {
            grid-template-columns: 130px 1fr auto;
            gap: 20px;
        }

        .stats-row {
            grid-template-columns: 1fr 1fr;
            row-gap: 22px;
        }

        .stat-item {
            border-left: 0;
            padding: 22px 16px 0;
            border-top: 1px solid rgba(255, 255, 255, .13);
        }

        .stat-item:nth-child(-n+2) {
            border-top: 0;
        }

        .solution-panel {
            display: block;
        }

        .solution-intro {
            margin-bottom: 34px;
        }
    }

    @media (max-width: 767.98px) {
        .case-card {
            grid-column: 1;
        }

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

        .hero {
            padding-top: 124px;
        }

        .hero-actions {
            width: 100%;
        }

        .hero-actions .btn {
            flex: 1 1 100%;
            padding-top: 14px;
            padding-bottom: 14px;
        }

        .news-row-link {
            grid-template-columns: 1fr auto;
            padding: 22px 6px;
        }

        .news-meta {
            grid-row: 1;
            grid-column: 1;
            align-items: center;
            flex-direction: row;
            flex-wrap: wrap;
            gap: 8px;
            justify-content: space-between;
        }

        .news-title {
            grid-column: 1;
            grid-row: 2;
        }

        .news-summary {
            grid-column: 1 / 3;
            grid-row: 3;
        }

        .news-arrow {
            grid-column: 2;
            grid-row: 1 / 3;
            align-self: center;
        }

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

        .footer-brand-block {
            grid-column: 1 / -1;
        }

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

    @media (max-width: 575.98px) {
        .browse-item-link {
            grid-template-columns: 44px 1fr;
            gap: 14px;
        }

        .browse-more {
            grid-column: 2;
            margin-bottom: 4px;
        }

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

        .stat-item,
        .stat-item:nth-child(-n+2) {
            border-top: 1px solid rgba(255, 255, 255, .13);
        }

        .stat-item:first-child {
            border-top: 0;
        }

        .solution-tabs {
            gap: 18px;
        }

        .solution-tabs .nav-link {
            font-size: 15px;
        }

        .news-meta {
            align-items: flex-start;
            flex-direction: column;
            justify-content: flex-start;
        }

        .faq-accordion .accordion-button {
            font-size: 15px;
        }

        .contact-info-block {
            border-radius: 18px 18px 0 0;
        }

        .contact-form-block {
            border-radius: 0 0 18px 18px;
            padding: 28px 24px;
        }

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

    @media (prefers-reduced-motion: reduce) {
        html {
            scroll-behavior: auto;
        }

        *,
        *::before,
        *::after {
            animation-duration: 1ms !important;
            animation-iteration-count: 1 !important;
            transition-duration: 1ms !important;
        }

        .js .reveal {
            opacity: 1;
            transform: none;
        }

        .mobile-drawer {
            transition: none;
        }

        .nav-scrim {
            transition: none;
        }
    }

/* roulang page: category1 */
:root {
            --bg: #f5f1ea;
            --card-bg: #ffffff;
            --ink: #24201c;
            --ink-2: #6e625a;
            --line: rgba(36, 32, 28, 0.12);
            --accent: #a4552c;
            --accent-bright: #e09268;
            --dark: #1a1613;
            --white-ink: #f6efe6;
            --radius: 12px;
            --radius-sm: 6px;
            --shadow: 0 10px 30px rgba(30, 20, 10, .06);
            --shadow-hover: 0 18px 40px rgba(30, 20, 10, .12);
            --container: 1240px;
            --space: 120px;
            --ease: cubic-bezier(.22, .61, .36, 1);
        }
        audio,
        canvas,
        iframe,
        img,
        svg,
        video {
            vertical-align: middle
        }
        *, ::after, ::before { box-sizing: border-box; }
        body {
            margin: 0;
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", system-ui, sans-serif;
            background: var(--bg);
            color: var(--ink);
            line-height: 1.8;
            -webkit-font-smoothing: antialiased;
        }
        h1,h2,h3,h4,h5,h6 { font-weight: 800; line-height: 1.3; color: var(--ink); }
        p { color: var(--ink-2); }
        a { text-decoration: none; color: var(--accent); transition: color .25s; }
        a:hover { color: var(--accent); }
        img { max-width: 100%; }
        .container-cat { max-width: var(--container); }
        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 0; left: 0; right: 0; z-index: 1000;
            padding: 0 0;
            background: rgba(26, 20, 16, .72);
            -webkit-backdrop-filter: blur(18px) saturate(150%);
            backdrop-filter: blur(18px) saturate(150%);
            border-bottom: 1px solid rgba(255, 255, 255, .16);
            transition: background .35s, box-shadow .35s, border-color .35s;
            box-shadow: 0 12px 40px rgba(0,0,0,.18);
        }
        .site-header.scrolled {
            background: #faf7f1;
            border-bottom: 1px solid var(--line);
            -webkit-backdrop-filter: blur(14px);
            backdrop-filter: blur(14px);
            box-shadow: 0 8px 32px rgba(30,20,10,.06);
        }
        .site-header.scrolled .brand,
        .site-header.scrolled .desktop-nav-link,
        .site-header.scrolled .btn-header {
            color: var(--ink);
        }
        .site-header.scrolled .desktop-nav-link::after { background: var(--accent); }
        .header-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 76px;
            padding: 8px 0;
        }
        .brand {
            font-size: 1.35rem;
            font-weight: 900;
            letter-spacing: .02rem;
            color: var(--white-ink);
            line-height: 1.3;
            padding: 5px 0;
        }
        .desktop-nav { margin-left: auto; margin-right: 24px; }
        .desktop-nav-list {
            display: flex;
            align-items: center;
            gap: 12px;
            list-style: none;
            margin: 0; padding: 0;
        }
        .desktop-nav-link {
            position: relative;
            display: inline-block;
            padding: 10px 14px;
            font-size: .925rem;
            font-weight: 600;
            color: var(--white-ink);
            line-height: 1.4;
            letter-spacing: .01em;
            transition: color .25s;
        }
        .desktop-nav-link::after {
            content: "";
            position: absolute;
            left: 14px; right: 14px; bottom: 4px;
            height: 2px;
            background: var(--accent-bright);
            transform: scaleX(0);
            transform-origin: right;
            transition: transform .3s var(--ease);
        }
        .desktop-nav-link:hover::after,
        .desktop-nav-link:focus-visible::after,
        .desktop-nav-link.active::after {
            transform: scaleX(1);
            transform-origin: left;
        }
        .desktop-nav-link.active { color: var(--accent-bright); }
        .btn-header {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 42px;
            padding: 8px 20px;
            border: 1px solid rgba(255,255,255,.3);
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: .9rem;
            color: var(--white-ink);
            transition: background .3s, border .3s, color .3s, transform .25s;
            background: transparent;
            white-space: nowrap;
        }
        .btn-header:hover { background: var(--accent-bright); border-color: var(--accent-bright); }
        .menu-toggle { display: none; }
        .menu-toggle-box span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--white-ink);
            margin: 5px 0;
            border-radius: 2px;
            transition: transform .3s var(--ease);
        }
        .site-header.scrolled .menu-toggle-box span { background: var(--ink); }
        .nav-scrim {
            display: none;
            position: fixed;
            top: 0; left: 0; width: 100%; height: 100%;
            background: rgba(26, 17, 12, .42);
            z-index: -1;
            opacity: 0;
            transition: opacity .3s;
        }
        .mobile-drawer {
            display: none;
            position: fixed;
            top: 0; right: 0; width: min(86vw, 390px);
            height: 100vh;
            background: #faf7f1;
            z-index: 1200;
            padding: 28px 32px;
            box-shadow: -12px 0 44px rgba(30,20,10,.12);
            transform: translateX(102%);
            transition: transform .45s var(--ease);
            overflow-y: auto;
            flex-direction: column;
            gap: 26px;
        }
        .mobile-drawer.open { transform: translateX(0); }
        .nav-scrim.show { opacity: 1; pointer-events: auto; }
        .mobile-drawer-head {
            display: flex; align-items: center; justify-content: space-between;
            padding-bottom: 18px;
            border-bottom: 1px solid var(--line);
        }
        .mobile-drawer-head .brand { color: var(--ink); }
        .drawer-close {
            background: none; border: 0;
            font-size: .9rem; color: var(--ink-2);
            cursor: pointer;
        }
        .mobile-nav-list { list-style: none; margin: 10px 0 0; padding: 0; display: grid; gap: 14px; }
        .mobile-nav-list a {
            display: block;
            font-weight: 600;
            color: var(--ink);
            padding: 10px 0;
            font-size: 1rem;
            border-bottom: 1px solid var(--line);
        }
        .mobile-nav-list a.active { color: var(--accent); }
        .drawer-cta { width: 100%; text-align: center; margin-top: 12px; }
        /* ===== 按钮通用 ===== */
        .btn-theme {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--accent);
            color: #fff;
            border: 1px solid var(--accent);
            font-weight: 600;
            font-size: .95rem;
            padding: 10px 28px;
            min-height: 48px;
            border-radius: var(--radius-sm);
            line-height: 1.5;
            transition: background .3s, box-shadow .3s, transform .25s;
        }
        .btn-theme:hover {
            background: #8c431f;
            border-color: #8c431f;
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 12px 22px rgba(164, 85, 44, .22);
        }
        .btn-theme-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: transparent;
            color: var(--accent);
            border: 1px solid var(--accent);
            font-weight: 600;
            font-size: .95rem;
            padding: 10px 28px;
            min-height: 48px;
            border-radius: var(--radius-sm);
            transition: all .25s;
        }
        .btn-theme-outline:hover { background: rgba(164, 85, 44, .08); transform: translateY(-2px); }
        /* ===== 分类页 Hero ===== */
        .category-hero {
            position: relative;
            background-color: var(--dark);
            background-image: linear-gradient(120deg, rgba(26,22,19,.88) 0%, rgba(26,22,19,.72) 45%, rgba(36,32,28,.65) 100%), url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            color: var(--white-ink);
            padding: 168px 0 92px;
            border-bottom: 1px solid rgba(255,255,255,.06);
        }
        .category-hero .hero-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            border: 1px solid rgba(255,255,255,.18);
            border-radius: 100px;
            padding: 4px 14px 4px 10px;
            font-size: .75rem;
            color: #e9d8cb;
            letter-spacing: .12em;
            text-transform: uppercase;
            margin-bottom: 24px;
            background: rgba(255,255,255,.06);
        }
        .category-hero h1 {
            font-size: clamp(2.4rem, 5vw, 3.6rem);
            color: #fff;
            max-width: 760px;
            margin-bottom: 20px;
            letter-spacing: -.01em;
            line-height: 1.2;
        }
        .category-hero p.lead {
            color: #e2d7cd;
            font-size: 1.1rem;
            max-width: 660px;
            margin-bottom: 28px;
            line-height: 1.85;
        }
        .breadcrumb-cat {
            position: relative;
            background: transparent;
            padding: 12px 0 0;
            margin-bottom: 0;
            list-style: none;
            display: flex;
            gap: 6px;
            font-size: .82rem;
            color: rgba(255,255,255,.66);
        }
        .breadcrumb-cat a { color: #d5aa8f; border-bottom: 1px dashed rgba(213,170,143,.5); margin: 0 4px; }
        .breadcrumb-cat a:hover { color: #f3c1a0; border-color: #f3c1a0; }
        /* ===== 分类页布局 ===== */
        .cat-wrap {
            padding: 80px 0 96px;
            background: var(--bg);
        }
        .cat-grid { display: grid; grid-template-columns: 280px minmax(0, 1fr); gap: 64px; align-items: start; }
        .cat-toc {
            position: sticky;
            top: 108px;
            background: #fff;
            border: 1px solid var(--line);
            border-radius: var(--radius);
            padding: 28px;
            box-shadow: var(--shadow);
            max-height: calc(100vh - 130px);
            overflow-y: auto;
        }
        .cat-toc-title {
            font-size: .8rem;
            letter-spacing: .16em;
            color: var(--ink-2);
            text-transform: uppercase;
            margin-bottom: 18px;
            font-weight: 700;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .cat-toc-title::after {
            content: "";
            height: 1px;
            flex: 1;
            background: var(--line);
        }
        .cat-toc ul {
            list-style: none;
            margin: 0;
            padding: 0;
            display: grid;
            gap: 2px;
            border-left: 1px solid var(--line);
        }
        .cat-toc li a {
            position: relative;
            display: block;
            padding: 7px 12px;
            font-size: .88rem;
            font-weight: 500;
            color: var(--ink-2);
            line-height: 1.5;
            border-left: 2px solid transparent;
            margin-left: -1px;
            transition: all .2s;
        }
        .cat-toc li a:hover,
        .cat-toc li a.active {
            color: var(--accent);
            border-left-color: var(--accent);
            background: rgba(164,85,44,.05);
        }
        .cat-toc .toc-sub {
            font-size: .82rem;
            padding-left: 24px;
            color: #8f8378;
        }
        .story-inner { min-width: 0; }
        .story-section {
            background: #fff;
            border-radius: var(--radius);
            padding: 52px 48px;
            border: 1px solid var(--line);
            box-shadow: var(--shadow);
        }
        .story-section + .story-section { margin-top: 28px; }
        .section-kicker {
            display: inline-flex;
            align-items: center;
            font-size: .75rem;
            font-weight: 700;
            color: var(--accent);
            letter-spacing: .2em;
            text-transform: uppercase;
            margin-bottom: 8px;
            gap: 8px;
        }
        .section-kicker::before { content: ""; width: 24px; height: 2px; background: var(--accent); display: inline-block; }
        .story-section h2 {
            font-size: 1.65rem;
            color: var(--ink);
            margin-bottom: 24px;
            margin-top: 8px;
            letter-spacing: -.01em;
        }
        .story-section h2 .num {
            display: inline-block;
            background: var(--dark);
            color: var(--accent-bright);
            font-size: .85rem;
            vertical-align: upper;
            border-radius: 4px;
            padding: 2px 8px;
            margin-right: 8px;
            letter-spacing: .08em;
        }
        .story-section h3 {
            font-size: 1.2rem;
            margin-top: 28px;
            color: var(--ink);
        }
        .story-section p {
            font-size: .98rem;
            color: var(--ink-2);
            margin-bottom: 16px;
            max-width: 80ch;
        }
        .story-section strong { color: var(--ink); font-weight: 600; }
        .story-inset {
            background: #faf7f1;
            border-left: 3px solid var(--accent);
            padding: 18px 24px;
            margin: 24px 0;
            border-radius: 0 10px 10px 0;
        }
        .story-inset p { font-size: .95rem; margin-bottom: 0; }
        .guide-step {
            display: flex;
            gap: 18px;
            align-items: flex-start;
            background: #faf7f1;
            padding: 20px 22px;
            border-radius: 10px;
            margin-bottom: 12px;
            border: 1px solid rgba(36, 32, 28, .05);
        }
        .guide-step .step-num {
            flex: 0 0 34px;
            height: 34px;
            background: var(--accent);
            color: #fff;
            border-radius: 50%;
            font-size: .9rem;
            font-weight: 800;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            line-height: 1;
        }
        .guide-step h4 { font-size: 1rem; margin-bottom: 6px; }
        .guide-step p { font-size: .9rem; margin-bottom: 0; max-width: 90ch; }
        .feature-list-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 3px 36px; margin: 16px 0 24px; padding: 0; list-style: none; }
        .feature-list-grid li { padding: 10px 0 4px; border-bottom: 1px dashed var(--line); font-size: .95rem; display: flex; gap: 8px; align-items: baseline; }
        .feature-list-grid li::before { content: "✓"; color: var(--accent); font-weight: 900; }
        .tag {
            display: inline-block;
            background: rgba(164,85,44,.1);
            color: var(--accent);
            font-size: .78rem;
            border-radius: 100px;
            padding: 2px 12px;
            font-weight: 600;
        }
        /* 首尾卡片 */
        .rel-card-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 24px; }
        .rel-card {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: var(--radius);
            padding: 24px;
            transition: transform .25s, box-shadow .25s;
        }
        .rel-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
        .rel-card .title { font-size: 1rem; font-weight: 700; color: var(--ink); margin-bottom: 8px; display: block; }
        .rel-card p { font-size: .82rem; margin-bottom: 12px; }
        .rel-card .arrow { color: var(--accent); font-weight: 800; }
        /* FAQ 内嵌 */
        .faq-compact { margin: 20px 0 8px; }
        .faq-compact-item { border-bottom: 1px solid var(--line); padding: 20px 0; }
        .faq-compact-item:first-child { border-top: 1px solid var(--line); }
        .faq-compact-q {
            width: 100%;
            text-align: left;
            background: none;
            border: 0;
            padding: 0;
            font: inherit;
            font-weight: 700;
            font-size: .98rem;
            color: var(--ink);
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            cursor: pointer;
        }
        .faq-icon { width: 20px; height: 20px; flex: 0 0 20px; position: relative; }
        .faq-icon::before, .faq-icon::after { content:""; position: absolute; background: var(--accent); border-radius: 2px; }
        .faq-icon::before { top: 50%; left: 0; width: 100%; height: 2px; transform: translateY(-50%); }
        .faq-icon::after { left: 50%; top: 0; width: 2px; height: 100%; transform: translateX(-50%); transition: transform .3s var(--ease); }
        .faq-compact-q[aria-expanded="true"] .faq-icon::after { transform: translateX(-50%) scaleY(0); }
        .faq-compact-a { padding: 8px 0 0 8px; }
        .faq-compact-a p { font-size: .92rem; margin-bottom: 6px; color: var(--ink-2); }
        /* 联系 CTA */
        .cta-block {
            margin: 56px 0 0;
            background: var(--dark);
            border-radius: 16px;
            color: var(--white-ink);
            padding: 52px 48px;
            display: flex;
            flex-wrap: wrap;
            gap: 28px;
            align-items: center;
            justify-content: space-between;
            border: 1px solid rgba(255,255,255,.08);
        }
        .cta-block h2 { color: #fff; font-size: 1.6rem; margin-bottom: 12px; margin-top: 0; }
        .cta-block p { color: #c8b8ab; margin: 0; max-width: 520px; font-size: .95rem; }
        .cta-block .btn-theme { background: var(--accent); border: none; padding: 12px 34px; }
        /* 图片附图 */
        .cat-card-img { border-radius: 10px; margin: 16px 0 22px; width: 100%; }
        /* 工具对照表 */
        .compare-table { width: 100%; border-collapse: collapse; margin: 20px 0; font-size: .92rem; }
        .compare-table th { background: var(--dark); color: #fff; padding: 12px 18px; text-align: left; font-size: .85rem; }
        .compare-table td { padding: 12px 18px; border-bottom: 1px solid var(--line); color: var(--ink-2); }
        .compare-table tr:hover td { background: #faf7f1; }
        /* ===== Footer ===== */
        .footer { background: var(--dark); color: rgba(246,239,230,.55); padding: 68px 0 32px; margin-top: 0; }
        .footer-topline { margin: 0; border: 0; border-top: 3px solid var(--accent-bright); opacity: .9; }
        .footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 40px; padding: 34px 0; }
        .footer .brand { display: block; color: #fff; font-size: 1.24rem; margin-bottom: 10px; }
        .footer-about { font-size: .84rem; line-height: 1.7; color: rgba(246, 239, 230, .68); max-width: 24em; }
        .footer-title { color: #f6efe6; font-size: .9rem; letter-spacing: .1em; font-weight: 700; margin-bottom: 16px; }
        .footer-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
        .footer-list a {
            font-size: .85rem;
            color: rgba(246,239,230,.6);
            transition: color .3s;
        }
        .footer-list a:hover { color: var(--accent-bright); }
        .footer-contact-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; font-size: .85rem; }
        .footer-contact-list a { color: rgba(246,239,230,.6); transition: color .3s; }
        .footer-contact-list a:hover { color: var(--accent-bright); }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,.1);
            padding-top: 22px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            font-size: .78rem;
            color: rgba(246,239,230,.4);
            gap: 10px 22px;
        }
        .footer-bottom a { color: var(--accent-bright); border-bottom: 1px dashed rgba(224,146,104,.5); }
        .back-top { color: var(--accent-bright) !important; border-bottom: 0 !important; }
        /* ===== 响应式 ===== */
        @media (max-width: 991px) {
            .desktop-nav { display: none; }
            .btn-header { display: none; }
            .menu-toggle { display: block; background: none; border: 0; cursor: pointer; padding: 8px 2px; position: relative;; z-index:100; }
            .nav-scrim { display: block; }
            .mobile-drawer { display: flex; right: 0; }
            .cat-grid { grid-template-columns: 1fr; gap: 32px; }
            .cat-toc { position: static; max-height: none; }
            .story-section { padding: 32px 28px; }
            .feature-list-grid { grid-template-columns: 1fr; }
            .rel-card-row { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr 1fr 1fr; }
        }
        @media (max-width: 768px) {
            :root { --space: 70px; }
            .hero { min-height: 88vh; padding-top: 110px; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .category-hero { padding: 134px 0 56px; }
        }
        @media (max-width: 520px) {
            .category-hero h1 { font-size: 2rem; }
            .footer-grid { grid-template-columns: 1fr; }
            .cta-block { padding: 32px 28px; }
            .story-section { padding: 26px 20px; }
        }
        /* 动效 */
        @media (prefers-reduced-motion: reduce) {
            *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .05ms !important; }
        }
        .reveal { opacity: 0; transform: translateY(22px); transition: opacity .6s var(--ease), transform .6s var(--ease); }
        .reveal.visible { opacity: 1; transform: none; }

/* roulang page: article */
:root {
            --bg: #f5f1e9;
            --surface: #fffdf9;
            --surface-solid: #ffffff;
            --ink: #24201c;
            --muted: #6e625a;
            --line: rgba(36, 32, 28, 0.12);
            --accent: #a4552c;
            --accent-dark: #813c1e;
            --accent-light: #e09268;
            --dark: #1a1613;
            --dark-soft: #241e18;
            --radius-card: 16px;
            --radius-box: 12px;
            --radius-btn: 8px;
            --shadow-sm: 0 10px 30px rgba(30, 20, 10, 0.06);
            --shadow-md: 0 18px 40px rgba(30, 20, 10, 0.12);
            --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", system-ui, sans-serif;
        }

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

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

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

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

        a {
            color: var(--accent);
            text-decoration: none;
            transition: color 0.25s ease, background 0.25s ease, border-color 0.25s ease;
        }

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

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

        .container {
            max-width: 1240px;
            padding-left: 24px;
            padding-right: 24px;
        }

        .header-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 18px;
            min-height: 56px;
        }

        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1090;
            padding: 12px 0;
            background: rgba(26, 20, 16, 0.58);
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            transition: background 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease;
        }

        .site-header.header-scrolled {
            background: rgba(247, 242, 234, 0.96);
            border-bottom: 1px solid var(--line);
            box-shadow: 0 8px 30px rgba(30, 20, 10, 0.06);
            padding: 8px 0;
        }

        .brand {
            display: inline-flex;
            align-items: baseline;
            gap: 9px;
            color: #f7efe6;
            font-weight: 800;
            font-size: 1.16rem;
            letter-spacing: 0.02em;
            line-height: 1.2;
            white-space: nowrap;
        }

        .brand::before {
            content: "";
            width: 9px;
            height: 9px;
            border-radius: 2px;
            background: var(--accent-light);
            box-shadow: 0 0 0 4px rgba(224, 146, 104, 0.22);
            transform: translateY(-1px);
        }

        .site-header .brand {
            color: #f8f1e9;
        }

        .desktop-nav {
            display: flex;
            align-items: center;
        }

        .desktop-nav-list {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .desktop-nav-link {
            position: relative;
            display: inline-block;
            padding: 8px 2px;
            font-size: 14px;
            font-weight: 600;
            color: rgba(250, 244, 235, 0.84);
            letter-spacing: 0.02em;
        }

        .site-header.header-scrolled .brand,
        .site-header.header-scrolled .desktop-nav-link {
            color: var(--ink);
        }

        .site-header.header-scrolled .desktop-nav-link {
            color: rgba(36, 32, 28, 0.82);
        }

        .desktop-nav-link::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 100%;
            height: 2px;
            background: var(--accent-light);
            transform: scaleX(0);
            transform-origin: right center;
            transition: transform 0.32s ease;
        }

        .desktop-nav-link:hover::after,
        .desktop-nav-link.active::after {
            transform: scaleX(1);
            transform-origin: left center;
        }

        .desktop-nav-link:hover,
        .desktop-nav-link.active {
            color: var(--accent);
        }

        .site-header.header-scrolled .desktop-nav-link:hover,
        .site-header.header-scrolled .desktop-nav-link.active {
            color: var(--accent);
        }

        .desktop-nav-link:focus-visible,
        .btn-header:focus-visible,
        .menu-toggle:focus-visible {
            outline: 2px solid var(--accent-light);
            outline-offset: 4px;
            border-radius: 4px;
        }

        .btn-header {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 9px 18px;
            border: 1px solid rgba(255, 255, 255, 0.28);
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-weight: 700;
            color: #f8f1e9;
            background: transparent;
            transition: all 0.25s ease;
            margin-left: auto;
        }

        .btn-header:hover {
            border-color: var(--accent-light);
            background: rgba(224, 146, 104, 0.12);
            color: #fff;
        }

        .site-header.header-scrolled .btn-header {
            border-color: var(--line);
            color: var(--ink);
        }

        .site-header.header-scrolled .btn-header:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: rgba(164, 85, 44, 0.08);
        }

        .menu-toggle {
            display: none;
            width: 46px;
            height: 46px;
            align-items: center;
            justify-content: center;
            border: 1px solid rgba(255, 255, 255, 0.24);
            border-radius: 10px;
            background: transparent;
            padding: 0;
            transition: border-color 0.25s ease;
        }

        .site-header.header-scrolled .menu-toggle {
            border-color: var(--line);
        }

        .menu-toggle-box {
            display: inline-flex;
            flex-direction: column;
            gap: 5px;
            width: 20px;
        }

        .menu-toggle-box span {
            height: 2px;
            border-radius: 4px;
            background: #f8f1e9;
            transition: background 0.25s ease;
        }

        .site-header.header-scrolled .menu-toggle-box span {
            background: var(--ink);
        }

        .nav-scrim {
            position: fixed;
            inset: 0;
            z-index: 1091;
            background: rgba(12, 8, 5, 0.48);
            opacity: 0;
            visibility: hidden;
            transition: opacity 0.3s ease, visibility 0.3s ease;
        }

        .nav-scrim.show {
            opacity: 1;
            visibility: visible;
        }

        .mobile-drawer {
            position: fixed;
            top: 0;
            right: 0;
            bottom: 0;
            z-index: 1092;
            width: min(84vw, 380px);
            background: #faf6ef;
            transform: translateX(100%);
            transition: transform 0.42s cubic-bezier(0.22, 0.61, 0.36, 1);
            display: flex;
            flex-direction: column;
            padding: 28px;
            box-shadow: -22px 0 50px rgba(18, 12, 8, 0.18);
            overflow-y: auto;
        }

        .mobile-drawer.open {
            transform: translateX(0);
        }

        .mobile-drawer-head {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 34px;
        }

        .mobile-drawer-head .brand {
            color: var(--ink);
        }

        .drawer-close {
            background: transparent;
            border: 1px solid var(--line);
            border-radius: 8px;
            color: var(--muted);
            font-size: 13px;
            padding: 8px 12px;
            transition: all 0.2s ease;
        }

        .drawer-close:hover {
            color: var(--accent);
            border-color: var(--accent);
        }

        .mobile-nav-list {
            list-style: none;
            margin: 0 0 28px;
            padding: 0;
        }

        .mobile-nav-list li + li {
            border-top: 1px solid var(--line);
        }

        .mobile-nav-list a {
            display: block;
            padding: 15px 2px;
            color: var(--ink);
            font-weight: 600;
            font-size: 16px;
        }

        .mobile-nav-list a:hover,
        .mobile-nav-list a.active {
            color: var(--accent);
        }

        .btn-theme {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 22px;
            border-radius: var(--radius-btn);
            background: var(--accent);
            color: #fff;
            font-weight: 700;
            font-size: 15px;
            border: 1px solid transparent;
            box-shadow: 0 10px 24px rgba(164, 85, 44, 0.2);
            transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
        }

        .btn-theme:hover {
            background: var(--accent-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 16px 30px rgba(164, 85, 44, 0.26);
        }

        .drawer-cta {
            margin-top: 8px;
            width: 100%;
        }

        .article-hero {
            position: relative;
            padding: 172px 0 72px;
            background:
                linear-gradient(90deg, rgba(26, 20, 16, 0.88) 0%, rgba(26, 20, 16, 0.62) 50%, rgba(26, 20, 16, 0.88) 100%),
                url("/assets/images/backpic/back-2.png") center center / cover no-repeat;
            color: #fbf5ed;
        }

        .article-hero-inner {
            max-width: 960px;
            margin: 0 auto;
            text-align: center;
        }

        .article-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            color: var(--accent-light);
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 0.28em;
            margin-bottom: 20px;
            text-transform: uppercase;
        }

        .article-eyebrow::before,
        .article-eyebrow::after {
            content: "";
            display: block;
            width: 22px;
            height: 1px;
            background: rgba(255, 255, 255, 0.24);
        }

        .article-title {
            margin: 0 0 22px;
            color: #fff9f2;
            font-size: clamp(2rem, 4.4vw, 3.7rem);
            font-weight: 800;
            line-height: 1.14;
            letter-spacing: -0.01em;
        }

        .article-summary {
            color: rgba(250, 244, 235, 0.84);
            font-size: 17px;
            line-height: 1.9;
            max-width: 760px;
            margin: 0 auto;
        }

        .article-meta-list {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: center;
            gap: 10px 26px;
            margin: 44px 0 0;
            padding: 20px 0 0;
            border-top: 1px solid rgba(255, 255, 255, 0.16);
            color: rgba(250, 244, 235, 0.74);
            font-size: 14px;
        }

        .article-meta-list li {
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .article-meta-list li + li::before {
            content: "";
            width: 3px;
            height: 3px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.42);
            margin-right: 18px;
        }

        .article-breadcrumb {
            background: #faf6ee;
            border-bottom: 1px solid var(--line);
            padding: 15px 0;
        }

        .breadcrumb-list {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 6px;
            margin: 0;
            padding: 0;
            font-size: 14px;
            color: var(--muted);
        }

        .breadcrumb-list li {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .breadcrumb-list li + li::before {
            content: "/";
            color: rgba(36, 32, 28, 0.32);
            font-size: 13px;
            margin-right: 4px;
        }

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

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

        .breadcrumb-list li:last-child {
            color: var(--ink);
            max-width: 320px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .article-layout {
            padding: 56px 0 40px;
        }

        .article-layout .row {
            align-items: flex-start;
        }

        .article-main {
            min-width: 0;
        }

        .article-content-card {
            background: var(--surface-solid);
            border: 1px solid var(--line);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-sm);
            padding: 58px 62px;
        }

        .article-prose {
            font-size: 17px;
            line-height: 1.9;
            color: #3e3832;
            word-break: break-word;
        }

        .article-prose p {
            margin: 0 0 26px;
        }

        .article-prose h1,
        .article-prose h2,
        .article-prose h3,
        .article-prose h4 {
            color: var(--ink);
            margin: 2em 0 0.85em;
            font-weight: 800;
            line-height: 1.3;
        }

        .article-prose h2 {
            font-size: 1.85rem;
        }

        .article-prose h3 {
            font-size: 1.36rem;
        }

        .article-prose h4 {
            font-size: 1.14rem;
        }

        .article-prose a {
            color: var(--accent);
            border-bottom: 1px solid rgba(164, 85, 44, 0.2);
        }

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

        .article-prose ul,
        .article-prose ol {
            margin: 0 0 26px;
            padding-left: 1.5rem;
        }

        .article-prose li {
            margin-bottom: 8px;
        }

        .article-prose blockquote {
            position: relative;
            margin: 32px 0;
            padding: 20px 26px;
            background: #faf5ec;
            border-left: 3px solid var(--accent);
            border-radius: 0 10px 10px 0;
            color: var(--muted);
        }

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

        .article-prose img {
            margin: 34px auto;
            border-radius: 12px;
            box-shadow: var(--shadow-sm);
            max-width: 100%;
        }

        .article-prose figure {
            margin: 34px 0;
        }

        .article-prose figcaption {
            text-align: center;
            color: var(--muted);
            font-size: 13px;
            margin-top: 10px;
        }

        .article-prose pre {
            position: relative;
            padding: 24px;
            margin: 30px 0;
            background: #1b1612;
            color: #f2e9df;
            border-radius: 12px;
            font-size: 14px;
            line-height: 1.8;
            overflow-x: auto;
        }

        .article-prose code {
            font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
            background: rgba(36, 32, 28, 0.08);
            color: var(--accent-dark);
            padding: 2px 6px;
            border-radius: 4px;
            font-size: 0.92em;
        }

        .article-prose pre code {
            background: transparent;
            color: inherit;
            padding: 0;
        }

        .article-prose table {
            width: 100%;
            margin: 30px 0;
            border-collapse: collapse;
            font-size: 15px;
        }

        .article-prose th,
        .article-prose td {
            border: 1px solid var(--line);
            padding: 12px 14px;
            text-align: left;
        }

        .article-prose th {
            background: #faf5ec;
            color: var(--ink);
            font-weight: 700;
        }

        .article-missing {
            padding: 60px 40px;
            text-align: center;
            background: #fcf8f1;
            border: 1px dashed rgba(36, 32, 28, 0.2);
            border-radius: var(--radius-card);
        }

        .article-missing h2 {
            font-size: 1.6rem;
            font-weight: 800;
        }

        .article-missing p {
            color: var(--muted);
            margin-bottom: 24px;
        }

        .article-aside {
            position: sticky;
            top: 120px;
            margin-top: 0;
        }

        .side-panel {
            background: var(--surface-solid);
            border: 1px solid var(--line);
            border-radius: var(--radius-card);
            overflow: hidden;
            margin-bottom: 22px;
            box-shadow: var(--shadow-sm);
        }

        .side-panel-body {
            padding: 26px;
        }

        .side-kicker {
            display: inline-block;
            margin-bottom: 12px;
            font-size: 12px;
            color: var(--accent);
            letter-spacing: 0.18em;
            font-weight: 700;
        }

        .side-title {
            font-size: 1.18rem;
            font-weight: 800;
            margin: 0 0 10px;
            color: var(--ink);
            line-height: 1.4;
        }

        .side-text {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.75;
            margin-bottom: 18px;
        }

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

        .side-link-list li + li {
            border-top: 1px solid var(--line);
        }

        .side-link-list a {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 13px 2px;
            color: var(--ink);
            font-weight: 600;
            font-size: 14px;
            transition: color 0.2s ease;
        }

        .side-link-list a:hover {
            color: var(--accent);
        }

        .side-link-list a::after {
            content: "→";
            color: var(--accent);
            opacity: 0;
            transform: translateX(-6px);
            transition: all 0.25s ease;
        }

        .side-link-list a:hover::after {
            opacity: 1;
            transform: translateX(0);
        }

        .side-image-wrap img {
            width: 100%;
            height: 190px;
            object-fit: cover;
        }

        .side-image-caption {
            padding: 16px 20px 20px;
        }

        .side-image-caption p {
            margin: 0 0 14px;
            font-size: 14px;
            color: var(--muted);
        }

        .side-image-caption a {
            font-size: 14px;
            font-weight: 700;
        }

        .more-paths-section {
            padding: 48px 0 30px;
        }

        .more-paths-head {
            display: flex;
            flex-wrap: wrap;
            align-items: flex-end;
            justify-content: space-between;
            gap: 16px;
            margin-bottom: 30px;
        }

        .more-paths-head h2 {
            margin: 0;
            font-size: 2rem;
            font-weight: 800;
            color: var(--ink);
        }

        .more-paths-head p {
            margin: 0;
            color: var(--muted);
            font-size: 15px;
        }

        .nav-card {
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            height: 100%;
            background: var(--surface-solid);
            border: 1px solid var(--line);
            border-radius: var(--radius-card);
            padding: 30px;
            box-shadow: var(--shadow-sm);
            transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
        }

        .nav-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: rgba(164, 85, 44, 0.22);
        }

        .nav-card-index {
            font-size: 14px;
            color: var(--accent);
            font-weight: 800;
            letter-spacing: 0.12em;
            margin-bottom: 20px;
        }

        .nav-card h3 {
            font-size: 1.16rem;
            font-weight: 800;
            margin: 0 0 10px;
            color: var(--ink);
            line-height: 1.4;
        }

        .nav-card p {
            margin: 0 0 26px;
            color: var(--muted);
            font-size: 14.5px;
            line-height: 1.8;
        }

        .nav-card-link {
            margin-top: auto;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 700;
            color: var(--accent);
        }

        .nav-card-link::after {
            content: "→";
            transition: transform 0.25s ease;
        }

        .nav-card-link:hover::after {
            transform: translateX(4px);
        }

        .contact-cta-section {
            background: var(--dark);
            color: #f7efe6;
            padding: 90px 0;
            margin-top: 70px;
            position: relative;
        }

        .contact-cta-section::before {
            content: "";
            position: absolute;
            left: 0;
            right: 0;
            top: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--accent), var(--accent-light), transparent 78%);
        }

        .contact-wrap {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
        }

        .contact-content {
            max-width: 620px;
        }

        .contact-eyebrow {
            color: var(--accent-light);
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 0.26em;
            margin-bottom: 10px;
        }

        .contact-content h2 {
            color: #fff8f0;
            font-size: clamp(1.7rem, 3vw, 2.5rem);
            line-height: 1.25;
            font-weight: 800;
            margin: 0 0 16px;
        }

        .contact-content p {
            color: rgba(250, 244, 235, 0.74);
            line-height: 1.9;
            margin: 0;
        }

        .contact-info {
            text-align: left;
            border-left: 1px solid rgba(255, 255, 255, 0.14);
            padding-left: 34px;
        }

        .contact-email {
            display: block;
            color: #fff8f0;
            font-size: 1.35rem;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .contact-email:hover {
            color: var(--accent-light);
        }

        .contact-note {
            color: rgba(250, 244, 235, 0.6);
            font-size: 14px;
        }

        .footer {
            background: var(--dark);
            color: rgba(247, 239, 230, 0.72);
            padding: 0 0 44px;
        }

        .footer-topline {
            margin: 0;
            border: 0;
            border-top: 3px solid var(--accent);
            opacity: 1;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
            gap: 44px;
            padding: 66px 0 54px;
        }

        .footer .brand {
            color: #fff8ef;
            font-size: 1.3rem;
            margin-bottom: 18px;
        }

        .footer-about {
            color: rgba(247, 239, 230, 0.66);
            font-size: 14px;
            line-height: 1.9;
            max-width: 360px;
            margin: 0;
        }

        .footer-title {
            color: #f7efe6;
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 18px;
        }

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

        .footer-list li {
            margin-bottom: 10px;
        }

        .footer-list a,
        .footer-contact-list a {
            color: rgba(247, 239, 230, 0.64);
            font-size: 14px;
            transition: color 0.2s ease;
        }

        .footer-list a:hover,
        .footer-contact-list a:hover {
            color: var(--accent-light);
        }

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

        .footer-contact-list li {
            font-size: 14px;
            color: rgba(247, 239, 230, 0.64);
            margin-bottom: 10px;
            line-height: 1.7;
        }

        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 13.5px;
            color: rgba(247, 239, 230, 0.5);
        }

        .footer-bottom a {
            color: rgba(247, 239, 230, 0.62);
        }

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

        .back-top {
            display: inline-flex;
            gap: 8px;
            align-items: center;
        }

        .reveal {
            opacity: 0;
            transform: translateY(22px);
            transition: opacity 0.6s cubic-bezier(0.22, 0.61, 0.36, 1), transform 0.6s cubic-bezier(0.22, 0.61, 0.36, 1);
        }

        .reveal.in-reveal {
            opacity: 1;
            transform: none;
        }

        @media (max-width: 991.98px) {
            .desktop-nav,
            .desktop-nav-list,
            .btn-header {
                display: none;
            }

            .menu-toggle {
                display: inline-flex;
            }

            .header-row {
                min-height: 50px;
            }

            .article-hero {
                padding: 138px 0 56px;
            }

            .article-content-card {
                padding: 44px 34px;
            }

            .article-aside {
                position: static;
                margin-top: 28px;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 40px;
                padding-top: 48px;
            }
        }

        @media (max-width: 767.98px) {
            .container {
                padding-left: 18px;
                padding-right: 18px;
            }

            .brand {
                font-size: 1.06rem;
            }

            .article-hero {
                padding: 126px 0 44px;
                background:
                    linear-gradient(180deg, rgba(26, 20, 16, 0.78), rgba(26, 20, 16, 0.86)),
                    url("/assets/images/backpic/back-2.png") center center / cover no-repeat;
            }

            .article-title {
                font-size: clamp(1.75rem, 6vw, 2.6rem);
                line-height: 1.2;
            }

            .article-summary {
                font-size: 15.5px;
            }

            .article-meta-list {
                gap: 10px 16px;
                margin-top: 30px;
            }

            .article-meta-list li + li::before {
                display: none;
                margin-right: 0;
            }

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

            .article-content-card {
                padding: 28px 22px;
                border-radius: 14px;
            }

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

            .article-breadcrumb {
                padding: 12px 0;
            }

            .breadcrumb-list {
                font-size: 13px;
            }

            .breadcrumb-list li:last-child {
                max-width: 160px;
            }

            .more-paths-section {
                padding: 30px 0 20px;
            }

            .more-paths-head {
                flex-direction: column;
                align-items: flex-start;
            }

            .contact-wrap {
                flex-direction: column;
                align-items: flex-start;
            }

            .contact-info {
                border-left: 0;
                border-top: 1px solid rgba(255, 255, 255, 0.14);
                padding-left: 0;
                padding-top: 26px;
                width: 100%;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
                padding-top: 40px;
                padding-bottom: 32px;
            }

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

            .side-panel {
                margin-bottom: 16px;
            }
        }

        @media (max-width: 575.98px) {
            .article-hero .article-eyebrow {
                font-size: 12px;
                letter-spacing: 0.18em;
            }

            .article-meta-list {
                justify-content: flex-start;
                text-align: left;
                padding-top: 16px;
            }

            .footer-about {
                font-size: 13px;
            }

            .drawer-cta {
                font-size: 14px;
            }
        }

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

            .reveal {
                opacity: 1;
                transform: none;
            }
        }

/* roulang page: category2 */
:root {
            --bg: #f5f1ea;
            --bg-soft: #faf7f1;
            --card: #ffffff;
            --ink: #24201c;
            --muted: #6e625a;
            --line: rgba(36, 32, 28, 0.12);
            --accent: #a4552c;
            --accent-dark: #8a431f;
            --accent-soft: rgba(164, 85, 44, 0.08);
            --dark: #1a1613;
            --dark-soft: #251e18;
            --radius-lg: 14px;
            --radius-sm: 8px;
            --shadow-sm: 0 10px 30px rgba(30, 20, 10, 0.06);
            --shadow-md: 0 18px 40px rgba(30, 20, 10, 0.12);
            --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", system-ui, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

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

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

        a {
            color: var(--accent);
            text-decoration: none;
            transition: color 0.25s ease;
        }

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

        ul,
        ol {
            margin: 0;
            padding: 0;
        }

        p {
            color: #3f3933;
        }

        .container {
            width: 100%;
            max-width: 1240px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        .container-fluid {
            padding-left: 24px;
            padding-right: 24px;
        }

        ::selection {
            background: rgba(164, 85, 44, 0.18);
            color: var(--ink);
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
        }

        section[id] {
            scroll-margin-top: 108px;
        }

        .btn-theme {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            min-height: 48px;
            padding: 12px 28px;
            background: var(--accent);
            color: #fff;
            border: 1px solid var(--accent);
            border-radius: 6px;
            font-weight: 700;
            font-size: 15px;
            line-height: 1;
            transition: background 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease, border-color 0.25s ease;
        }

        .btn-theme:hover {
            background: var(--accent-dark);
            border-color: var(--accent-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        .btn-line {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            min-height: 48px;
            padding: 12px 28px;
            background: transparent;
            color: #f6efe6;
            border: 1px solid rgba(255, 255, 255, 0.45);
            border-radius: 6px;
            font-weight: 600;
            font-size: 15px;
            line-height: 1;
            transition: background 0.25s ease, color 0.25s ease, border-color 0.25s ease, transform 0.25s ease;
        }

        .btn-line:hover {
            background: rgba(255, 255, 255, 0.14);
            color: #fff;
            border-color: rgba(255, 255, 255, 0.85);
            transform: translateY(-2px);
        }

        .btn-header {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 40px;
            padding: 9px 20px;
            border: 1px solid rgba(255, 255, 255, 0.4);
            color: #f6efe6;
            border-radius: 6px;
            font-size: 14px;
            font-weight: 600;
            transition: background 0.25s ease, color 0.25s ease, border-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
        }

        .btn-header:hover {
            border-color: rgba(255, 255, 255, 0.8);
            background: rgba(255, 255, 255, 0.14);
            color: #fff;
            transform: translateY(-1px);
        }

        .btn-outline-dark-soft {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            min-height: 46px;
            padding: 11px 24px;
            border: 1px solid rgba(36, 32, 28, 0.24);
            color: var(--ink);
            border-radius: 6px;
            font-weight: 600;
            font-size: 15px;
            transition: background 0.25s ease, border-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
        }

        .btn-outline-dark-soft:hover {
            background: var(--card);
            border-color: var(--accent);
            color: var(--accent);
            transform: translateY(-2px);
            box-shadow: var(--shadow-sm);
        }

        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1080;
            background: rgba(26, 20, 16, 0.72);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.14);
            color: #f6efe6;
            transition: background 0.35s ease, color 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease;
        }

        .site-header.scrolled {
            background: rgba(250, 247, 241, 0.96);
            color: var(--ink);
            border-bottom-color: var(--line);
            box-shadow: 0 10px 30px rgba(30, 20, 10, 0.07);
        }

        .header-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 82px;
            gap: 20px;
        }

        .brand {
            display: inline-flex;
            align-items: center;
            font-size: 21px;
            font-weight: 800;
            letter-spacing: 0.02em;
            color: inherit;
            line-height: 1.2;
            text-decoration: none;
            white-space: nowrap;
        }

        .brand::before {
            content: "";
            width: 9px;
            height: 18px;
            margin-right: 10px;
            background: var(--accent);
            border-radius: 2px;
            transform: skewX(-6deg);
        }

        .brand:hover {
            color: inherit;
        }

        .desktop-nav-list {
            display: flex;
            align-items: center;
            gap: 36px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .desktop-nav-link {
            position: relative;
            display: inline-block;
            padding: 10px 2px;
            color: inherit;
            font-size: 15px;
            font-weight: 500;
            opacity: 0.9;
            text-decoration: none;
            transition: opacity 0.25s ease;
        }

        .desktop-nav-link::after {
            content: "";
            position: absolute;
            left: 0;
            right: 0;
            bottom: 2px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
            transform: scaleX(0);
            transform-origin: right;
            transition: transform 0.32s cubic-bezier(0.22, 0.61, 0.36, 1);
        }

        .desktop-nav-link:hover {
            opacity: 1;
        }

        .desktop-nav-link:hover::after,
        .desktop-nav-link.active::after {
            transform: scaleX(1);
            transform-origin: left;
        }

        .desktop-nav-link.active {
            opacity: 1;
            font-weight: 700;
        }

        .menu-toggle {
            display: none;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            border: 1px solid rgba(255, 255, 255, 0.45);
            border-radius: 6px;
            background: transparent;
            color: #f6efe6;
            padding: 0;
            transition: border-color 0.25s ease, background 0.25s ease;
        }

        .site-header.scrolled .menu-toggle {
            border-color: var(--line);
            color: var(--ink);
        }

        .menu-toggle-box {
            display: block;
            width: 18px;
        }

        .menu-toggle-box span {
            display: block;
            height: 2px;
            background: currentColor;
            border-radius: 2px;
            margin: 4px 0;
        }

        .nav-scrim {
            position: fixed;
            inset: 0;
            z-index: 1090;
            background: rgba(18, 14, 11, 0.52);
            opacity: 0;
            visibility: hidden;
            transition: opacity 0.3s ease, visibility 0.3s ease;
        }

        .mobile-drawer {
            position: fixed;
            top: 0;
            right: 0;
            bottom: 0;
            z-index: 1095;
            width: min(380px, 87vw);
            background: var(--bg-soft);
            border-left: 1px solid var(--line);
            padding: 28px 26px;
            transform: translateX(105%);
            visibility: hidden;
            overflow-y: auto;
            transition: transform 0.35s cubic-bezier(0.22, 0.61, 0.36, 1), visibility 0.35s ease;
        }

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

        .site-header.nav-open .mobile-drawer {
            transform: translateX(0);
            visibility: visible;
        }

        .mobile-drawer-head {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 30px;
            border-bottom: 1px solid var(--line);
            padding-bottom: 22px;
        }

        .mobile-drawer-head .brand {
            color: var(--ink);
        }

        .drawer-close {
            background: none;
            border: none;
            color: var(--muted);
            font-size: 14px;
            padding: 8px 0;
            cursor: pointer;
        }

        .mobile-nav-list {
            list-style: none;
            margin: 0;
        }

        .mobile-nav-list li {
            border-bottom: 1px solid var(--line);
        }

        .mobile-nav-list a {
            display: block;
            padding: 15px 2px;
            color: var(--ink);
            font-weight: 600;
            text-decoration: none;
            position: relative;
        }

        .mobile-nav-list a.active {
            color: var(--accent);
        }

        .mobile-nav-list a.active::before {
            content: "";
            position: absolute;
            left: -12px;
            top: 14px;
            bottom: 14px;
            width: 3px;
            background: var(--accent);
            border-radius: 3px;
        }

        .drawer-cta {
            margin-top: 26px;
            width: 100%;
        }

        .page-hero {
            position: relative;
            padding: 206px 0 108px;
            color: #f6efe6;
            background-image: linear-gradient(84deg, rgba(24, 17, 12, 0.94), rgba(30, 20, 12, 0.64) 55%, rgba(20, 15, 11, 0.52)), url("/assets/images/backpic/back-2.png");
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            overflow: hidden;
        }

        .page-hero .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            color: #eab392;
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 0.18em;
            text-transform: uppercase;
            margin-bottom: 22px;
        }

        .page-hero .eyebrow::before {
            content: "";
            width: 28px;
            height: 1px;
            background: var(--accent);
        }

        .page-hero h1 {
            margin: 0 0 22px;
            max-width: 780px;
            font-size: clamp(2.5rem, 4.6vw, 4.3rem);
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -0.01em;
            color: #fff;
        }

        .page-hero .hero-sub {
            max-width: 680px;
            color: rgba(255, 255, 255, 0.82);
            font-size: 17px;
            line-height: 1.9;
            margin-bottom: 38px;
        }

        .page-hero .btn-group-hero {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 16px;
        }

        .breadcrumb-zone {
            background: var(--bg-soft);
            border-bottom: 1px solid var(--line);
            padding: 12px 0;
        }

        .breadcrumb-custom {
            background: transparent;
            padding: 0;
            margin: 0;
        }

        .breadcrumb-custom .breadcrumb-item {
            font-size: 14px;
            color: var(--muted);
        }

        .breadcrumb-custom .breadcrumb-item a {
            color: var(--muted);
            text-decoration: none;
        }

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

        .breadcrumb-custom .breadcrumb-item.active {
            color: var(--ink);
            font-weight: 600;
        }

        .breadcrumb-custom .breadcrumb-item + .breadcrumb-item::before {
            content: "→";
            color: rgba(110, 98, 90, 0.65);
        }

        .category-main {
            padding: 86px 0 30px;
        }

        .category-row {
            position: relative;
        }

        .toc-col {
            position: relative;
        }

        .toc-navigation {
            position: sticky;
            top: 116px;
            max-height: calc(100vh - 140px);
            overflow-y: auto;
            padding: 6px 0 6px 2px;
        }

        .toc-title {
            font-size: 12px;
            font-weight: 800;
            letter-spacing: 0.2em;
            color: var(--muted);
            margin-bottom: 16px;
        }

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

        .toc-list li {
            margin: 0;
        }

        .toc-list a {
            display: block;
            width: 100%;
            padding: 8px 0 8px 16px;
            border-left: 2px solid rgba(36, 32, 28, 0.1);
            color: var(--muted);
            font-size: 14px;
            font-weight: 500;
            text-decoration: none;
            transition: border-color 0.25s ease, color 0.25s ease, padding-left 0.25s ease;
        }

        .toc-list a:hover {
            border-color: var(--accent);
            color: var(--accent);
            padding-left: 22px;
        }

        .toc-note {
            margin-top: 34px;
            background: var(--card);
            border: 1px solid var(--line);
            border-radius: 10px;
            padding: 18px 16px;
            box-shadow: var(--shadow-sm);
            font-size: 13px;
            line-height: 1.7;
            color: var(--muted);
        }

        .toc-note strong {
            display: block;
            color: var(--ink);
            font-size: 14px;
            margin-bottom: 6px;
        }

        .category-content {
            padding-left: 18px;
        }

        .category-content > .scene-block:first-child {
            margin-top: 0;
        }

        .intro-section {
            background: var(--card);
            border: 1px solid var(--line);
            border-radius: var(--radius-lg);
            padding: 40px;
            margin-bottom: 36px;
            box-shadow: var(--shadow-sm);
        }

        .section-kicker {
            font-size: 13px;
            font-weight: 800;
            letter-spacing: 0.18em;
            color: var(--accent);
            text-transform: uppercase;
            margin-bottom: 12px;
        }

        .intro-section h2 {
            font-size: clamp(1.8rem, 3vw, 2.5rem);
            font-weight: 800;
            letter-spacing: -0.01em;
            color: var(--ink);
            margin-bottom: 20px;
            line-height: 1.25;
        }

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

        .intro-section p strong {
            color: var(--ink);
        }

        .intro-tag-list {
            margin-top: 26px;
            padding-top: 22px;
            border-top: 1px solid var(--line);
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .chip {
            display: inline-flex;
            align-items: center;
            padding: 5px 15px;
            background: var(--accent-soft);
            border: 1px solid rgba(164, 85, 44, 0.2);
            color: var(--accent);
            border-radius: 30px;
            font-size: 13px;
            font-weight: 600;
        }

        .mobile-toc {
            overflow-x: auto;
            margin-bottom: 28px;
            padding-bottom: 2px;
        }

        .mobile-toc-nav {
            display: flex;
            gap: 8px;
            flex-wrap: nowrap;
            width: max-content;
        }

        .mobile-toc-nav a {
            display: inline-flex;
            padding: 7px 15px;
            border: 1px solid var(--line);
            border-radius: 30px;
            background: var(--card);
            color: var(--muted);
            font-size: 13px;
            font-weight: 600;
            white-space: nowrap;
        }

        .mobile-toc-nav a:hover {
            color: var(--accent);
            border-color: var(--accent);
        }

        .scene-block {
            background: var(--card);
            border: 1px solid var(--line);
            border-radius: var(--radius-lg);
            padding: 34px 36px;
            margin-bottom: 32px;
            box-shadow: var(--shadow-sm);
            transition: box-shadow 0.25s ease, transform 0.25s ease;
        }

        .scene-block:hover {
            box-shadow: var(--shadow-md);
        }

        .scene-block.with-image .scene-layout {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            align-items: center;
            gap: 28px 32px;
        }

        .scene-no {
            font-size: 13px;
            font-weight: 800;
            letter-spacing: 0.18em;
            color: var(--accent);
            margin-bottom: 8px;
        }

        .scene-title {
            font-size: clamp(1.35rem, 2vw, 1.75rem);
            font-weight: 800;
            color: var(--ink);
            line-height: 1.35;
            margin-bottom: 16px;
            letter-spacing: -0.01em;
        }

        .scene-copy p {
            margin-bottom: 16px;
        }

        .scene-copy ul {
            list-style: none;
            margin: 14px 0 0;
        }

        .scene-copy ul li {
            position: relative;
            padding-left: 24px;
            margin-bottom: 10px;
            color: var(--muted);
            line-height: 1.8;
        }

        .scene-copy ul li::before {
            content: "→";
            position: absolute;
            left: 0;
            top: 0;
            color: var(--accent);
            font-weight: 700;
        }

        .scene-assets {
            margin-top: 18px;
            background: var(--bg-soft);
            border-left: 2px solid var(--accent);
            border-radius: 0 8px 8px 0;
            padding: 14px 18px;
            font-size: 14px;
            color: var(--muted);
        }

        .scene-assets strong {
            color: var(--ink);
        }

        .scene-role-line {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 18px;
            align-items: center;
            font-size: 13px;
            color: var(--muted);
        }

        .scene-role-line .label {
            font-weight: 700;
            color: var(--ink);
        }

        .scene-role-line a {
            font-weight: 600;
        }

        .scene-figure {
            margin: 0;
            width: 100%;
            overflow: hidden;
            border-radius: 10px;
            background: var(--bg-soft);
            border: 1px solid var(--line);
            box-shadow: var(--shadow-sm);
        }

        .scene-figure img {
            width: 100%;
            height: 270px;
            object-fit: cover;
            transition: transform 0.55s cubic-bezier(0.22, 0.61, 0.36, 1);
        }

        .scene-block.with-image:hover .scene-figure img {
            transform: scale(1.02);
        }

        .scene-figure figcaption {
            padding: 12px 16px;
            font-size: 13px;
            color: var(--muted);
            background: var(--bg-soft);
            border-top: 1px solid var(--line);
            line-height: 1.6;
        }

        .process-block {
            background: var(--dark);
            border-radius: var(--radius-lg);
            padding: 40px 42px;
            margin-bottom: 36px;
            color: #e9dfd2;
            box-shadow: 0 16px 36px rgba(20, 15, 10, 0.16);
        }

        .process-block .section-kicker {
            color: #e09268;
        }

        .process-block .process-heading {
            color: #fff;
            font-size: clamp(1.7rem, 2.6vw, 2.2rem);
            font-weight: 800;
            margin-bottom: 10px;
        }

        .process-block > p {
            color: rgba(255, 255, 255, 0.68);
            max-width: 640px;
        }

        .process-list {
            list-style: none;
            margin: 28px 0 0;
            padding: 0;
        }

        .process-step {
            position: relative;
            padding-left: 72px;
            padding-bottom: 0;
            margin-bottom: 26px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            padding-bottom: 26px;
        }

        .process-step:last-child {
            border-bottom: 0;
            margin-bottom: 0;
            padding-bottom: 0;
        }

        .process-step-num {
            position: absolute;
            left: 0;
            top: 0;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: rgba(164, 85, 44, 0.22);
            border: 1px solid #a4552c;
            color: #e09268;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: 800;
            letter-spacing: 0.04em;
        }

        .process-step h3 {
            color: #fff;
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 6px;
            line-height: 1.4;
        }

        .process-step p {
            color: rgba(255, 255, 255, 0.66);
            margin: 0;
            font-size: 15px;
            line-height: 1.75;
        }

        .next-read-card {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 28px;
            background: var(--card);
            border: 1px solid var(--line);
            border-radius: var(--radius-lg);
            padding: 34px 40px;
            margin-bottom: 56px;
            box-shadow: var(--shadow-sm);
        }

        .next-read-copy h2 {
            font-size: 22px;
            font-weight: 800;
            color: var(--ink);
            margin-bottom: 8px;
        }

        .next-read-copy p {
            color: var(--muted);
            margin: 0;
            max-width: 640px;
            font-size: 15px;
        }

        .next-read-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            flex-shrink: 0;
        }

        .faq-section {
            max-width: 860px;
        }

        .faq-section-body {
            margin-top: 10px;
        }

        .custom-faq {
            background: transparent;
            border: 0;
            border-bottom: 1px solid var(--line);
            border-radius: 0 !important;
        }

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

        .custom-faq .accordion-header {
            margin: 0;
        }

        .custom-faq .accordion-button {
            background: transparent;
            padding: 22px 44px 22px 0;
            font-size: 16px;
            font-weight: 700;
            color: var(--ink);
            box-shadow: none !important;
            letter-spacing: -0.01em;
            line-height: 1.55;
        }

        .custom-faq .accordion-button.collapsed {
            background: transparent;
            color: var(--ink);
        }

        .custom-faq .accordion-button:not(.collapsed) {
            color: var(--accent);
            background: transparent;
        }

        .custom-faq .accordion-button::after {
            content: "+";
            background-image: none;
            width: 28px;
            height: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            font-weight: 400;
            line-height: 1;
            color: var(--accent);
            transform: rotate(0deg);
            transition: transform 0.35s ease, color 0.25s ease;
        }

        .custom-faq .accordion-button:not(.collapsed)::after {
            transform: rotate(135deg);
        }

        .custom-faq .accordion-body {
            padding: 0 44px 26px 0;
            color: var(--muted);
            font-size: 15px;
            line-height: 1.85;
        }

        .contact-section {
            padding: 110px 0 90px;
        }

        .contact-card {
            background: var(--card);
            border: 1px solid var(--line);
            border-radius: 18px;
            box-shadow: var(--shadow-sm);
            padding: 54px 56px;
            position: relative;
            overflow: hidden;
        }

        .contact-card::before {
            content: "";
            position: absolute;
            left: 0;
            top: 0;
            width: 100%;
            height: 4px;
            background: linear-gradient(90deg, var(--accent), #d18a5a);
            border-radius: 4px;
        }

        .contact-intro h2 {
            font-size: clamp(2rem, 3.2vw, 2.8rem);
            font-weight: 800;
            color: var(--ink);
            line-height: 1.25;
            margin-bottom: 20px;
        }

        .contact-intro p {
            color: var(--muted);
            margin-bottom: 22px;
        }

        .contact-intro-list {
            list-style: none;
            margin: 22px 0 0;
        }

        .contact-intro-list li {
            padding: 10px 0;
            border-top: 1px solid var(--line);
            color: var(--muted);
            font-size: 15px;
            display: flex;
            gap: 12px;
            align-items: baseline;
        }

        .contact-intro-list li strong {
            color: var(--ink);
            min-width: 72px;
        }

        .contact-intro-list li a {
            color: var(--accent);
            font-weight: 600;
        }

        .form-label {
            font-size: 14px;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 8px;
        }

        .form-control {
            width: 100%;
            min-height: 48px;
            padding: 12px 16px;
            border: 1px solid rgba(36, 32, 28, 0.14);
            border-radius: 6px;
            background: var(--bg-soft);
            color: var(--ink);
            font-size: 15px;
            font-family: var(--font-sans);
            transition: border-color 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
        }

        .form-control::placeholder {
            color: rgba(110, 98, 90, 0.65);
        }

        .form-control:focus {
            outline: none;
            border-color: var(--accent);
            background: #fff;
            box-shadow: 0 0 0 3px rgba(164, 85, 44, 0.16);
        }

        textarea.form-control {
            min-height: 120px;
            line-height: 1.7;
            resize: vertical;
        }

        .footer {
            background: var(--dark);
            color: rgba(255, 255, 255, 0.62);
            padding: 74px 0 34px;
            font-size: 14px;
        }

        .footer-topline {
            margin: 0;
            border: 0;
            border-top: 3px solid var(--accent);
            opacity: 1;
        }

        .footer .footer-grid {
            display: grid;
            grid-template-columns: 1.9fr 1fr 1fr 1.3fr;
            gap: 36px 44px;
            margin-bottom: 52px;
        }

        .footer .brand {
            color: #f6efe6;
            margin-bottom: 16px;
            font-size: 22px;
        }

        .footer-about {
            color: rgba(255, 255, 255, 0.52);
            line-height: 1.85;
            margin: 0;
            max-width: 400px;
            font-size: 14px;
        }

        .footer-title {
            color: #f6efe6;
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 20px;
            letter-spacing: 0.02em;
        }

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

        .footer-list li,
        .footer-contact-list li {
            margin-bottom: 12px;
            line-height: 1.6;
        }

        .footer-list a,
        .footer-contact-list a {
            color: rgba(255, 255, 255, 0.58);
            text-decoration: none;
            transition: color 0.2s ease, padding-left 0.25s ease;
        }

        .footer-list a:hover {
            color: #e09268;
            padding-left: 4px;
        }

        .footer-contact-list {
            list-style: none;
            margin: 0;
            padding: 0;
            color: rgba(255, 255, 255, 0.58);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            color: rgba(255, 255, 255, 0.45);
            font-size: 13px;
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.45);
            text-decoration: none;
            margin-left: 8px;
        }

        .footer-bottom a:hover {
            color: #e09268;
        }

        .back-top {
            font-size: 13px;
            font-weight: 600;
        }

        @media (min-width: 1200px) {
            .category-content {
                padding-left: 26px;
            }
        }

        @media (min-width: 992px) {
            .mobile-toc {
                display: none;
            }
        }

        @media (max-width: 991.98px) {
            .desktop-nav,
            .btn-header {
                display: none;
            }

            .menu-toggle {
                display: inline-flex;
            }

            .category-main {
                padding-top: 62px;
            }

            .category-content {
                padding-left: 0;
            }

            .toc-col {
                display: none;
            }

            .scene-block {
                padding: 28px 26px;
            }

            .scene-block.with-image .scene-layout {
                grid-template-columns: 1fr;
            }

            .scene-figure img {
                height: 240px;
            }

            .next-read-card {
                flex-direction: column;
                align-items: flex-start;
                padding: 28px 28px;
            }

            .contact-card {
                padding: 42px 32px;
            }

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

        @media (max-width: 767.98px) {
            .page-hero {
                padding: 176px 0 72px;
            }

            .page-hero h1 {
                font-size: clamp(2.2rem, 8vw, 3.2rem);
            }

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

            .btn-group-hero .btn-theme,
            .btn-group-hero .btn-line {
                width: 100%;
            }

            .page-hero .btn-group-hero {
                flex-direction: column;
                align-items: stretch;
            }

            .category-main {
                padding-top: 44px;
                padding-bottom: 10px;
            }

            .intro-section {
                padding: 28px 22px;
            }

            .scene-block {
                padding: 26px 20px;
                margin-bottom: 26px;
            }

            .scene-block.with-image .scene-layout {
                gap: 24px;
            }

            .scene-figure img {
                height: 210px;
            }

            .process-block {
                padding: 32px 24px;
                margin-bottom: 30px;
            }

            .process-step {
                padding-left: 60px;
            }

            .footer {
                padding-top: 58px;
            }

            .footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 26px;
            }
        }

        @media (max-width: 575.98px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .header-row {
                min-height: 74px;
            }

            .brand {
                font-size: 18px;
            }

            .brand::before {
                height: 15px;
                margin-right: 8px;
            }

            .mobile-drawer {
                padding: 24px 20px;
            }

            .category-main {
                padding-top: 34px;
            }

            .intro-section h2,
            .process-block .process-heading {
                font-size: 1.6rem;
            }

            .contact-card {
                padding: 38px 22px;
                border-radius: 14px;
            }

            .contact-section {
                padding: 78px 0 56px;
            }

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

            .back-top {
                align-self: flex-end;
            }
        }

        @media (prefers-reduced-motion: reduce) {
            html {
                scroll-behavior: auto;
            }

            *,
            *::before,
            *::after {
                animation-duration: 0.01ms !important;
                animation-iteration-count: 1 !important;
                transition-duration: 0.01ms !important;
                transition-delay: 0s !important;
            }
        }