/* roulang page: index */
:root {
            --ac-ink: #191D1C;
            --ac-paper: #F4F0E8;
            --ac-white: #FFFFFF;
            --ac-bronze: #A87C4A;
            --ac-pine: #2F5044;
            --ac-text-secondary: #635E57;
            --ac-text-muted: #A39D92;
            --ac-border: #E4DED2;
            --ac-dark-line: rgba(255,255,255,0.14);
            --ac-radius-sm: 8px;
            --ac-radius-md: 14px;
            --ac-radius-lg: 20px;
            --ac-shadow-card: 0 2px 8px rgba(25,29,28,0.04), 0 8px 24px rgba(25,29,28,0.06);
            --ac-shadow-hover: 0 12px 32px rgba(25,29,28,0.12);
            --ac-transition: 0.25s ease;
        }
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
            background-color: var(--ac-paper);
            color: var(--ac-ink);
            font-size: 16px;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }
        a { color: var(--ac-ink); text-decoration: none; transition: all var(--ac-transition); }
        a:hover { color: var(--ac-bronze); }
        img { max-width: 100%; height: auto; display: block; }
        ul, ol { list-style: none; }
        button { font-family: inherit; }
        input, select, textarea { font-family: inherit; }
        .ac-container { max-width: 1200px; margin: 0 auto; padding-left: 24px; padding-right: 24px; }
        .ac-section { padding: 96px 0; }
        @media (max-width: 1024px) { .ac-section { padding: 64px 0; } }
        @media (max-width: 600px) { .ac-section { padding: 48px 0; } }
        .ac-body-copy { font-size: 15px; line-height: 1.85; }
        .ac-text-secondary { color: var(--ac-text-secondary); }
        .ac-text-muted { color: var(--ac-text-muted); }

        .ac-section-head { margin-bottom: 48px; max-width: 640px; }
        .ac-section-eyebrow {
            display: inline-flex; align-items: center; gap: 8px;
            font-size: 12px; font-weight: 600; color: var(--ac-bronze);
            letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 12px;
        }
        .ac-section-eyebrow::before { content: ""; width: 28px; height: 1px; background: var(--ac-bronze); display: inline-block; }
        .ac-section-title { font-size: 32px; font-weight: 800; line-height: 1.3; letter-spacing: 0.02em; margin-bottom: 16px; }
        .ac-section-desc { font-size: 15px; color: var(--ac-text-secondary); line-height: 1.75; max-width: 480px; }

        .ac-btn {
            display: inline-flex; align-items: center; justify-content: center;
            height: 46px; padding: 0 28px; border-radius: var(--ac-radius-sm);
            border: 1px solid transparent; font-size: 15px; font-weight: 600;
            cursor: pointer; transition: all var(--ac-transition); text-decoration: none;
            background: transparent; line-height: 1.2;
        }
        .ac-btn:focus { outline: 2px solid var(--ac-bronze); outline-offset: 2px; }
        .ac-btn:hover { text-decoration: none; }
        .ac-btn:active { transform: translateY(1px); }
        .ac-btn--dark { background: var(--ac-ink); color: var(--ac-paper); }
        .ac-btn--dark:hover { background: #000; color: var(--ac-paper); }
        .ac-btn--bronze { background: var(--ac-bronze); color: #fff; }
        .ac-btn--bronze:hover { background: #946B3D; color: #fff; }
        .ac-btn--ghost { background: transparent; border: 1px solid var(--ac-ink); color: var(--ac-ink); }
        .ac-btn--ghost:hover { background: var(--ac-ink); color: var(--ac-paper); }
        .ac-btn--light { background: transparent; border: 1px solid rgba(255,255,255,0.6); color: #fff; }
        .ac-btn--light:hover { background: #fff; color: var(--ac-ink); }
        .ac-btn--block { width: 100%; }

        .ac-tag {
            display: inline-flex; align-items: center; padding: 4px 14px;
            background: rgba(47,80,68,0.1); color: var(--ac-pine);
            border-radius: 999px; font-size: 12px; font-weight: 600; letter-spacing: 0.02em;
        }

        .ac-header {
            position: sticky; top: 0; z-index: 1000;
            background: rgba(244,240,232,0.96);
            border-bottom: 1px solid var(--ac-border);
            backdrop-filter: blur(10px);
        }
        .ac-header-inner {
            max-width: 1200px; margin: 0 auto; padding: 0 24px;
            display: flex; align-items: center; justify-content: space-between; height: 72px;
        }
        .ac-logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; letter-spacing: 0.02em; color: var(--ac-ink); text-decoration: none; }
        .ac-logo:hover { color: var(--ac-ink); }
        .ac-logo-icon { width: 20px; height: 20px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
        .ac-logo-text { display: flex; align-items: center; gap: 4px; }
        .ac-logo-sep { width: 1px; height: 14px; background: var(--ac-bronze); margin: 0 4px; }
        .ac-nav { display: flex; align-items: center; gap: 28px; }
        .ac-nav-link {
            position: relative; font-size: 15px; color: var(--ac-text-secondary);
            text-decoration: none; padding: 8px 2px; font-weight: 500;
            transition: color var(--ac-transition); white-space: nowrap;
        }
        .ac-nav-link::after {
            content: ""; position: absolute; bottom: 0; left: 0; width: 100%; height: 2px;
            background: var(--ac-bronze); transform: scaleX(0); transform-origin: left;
            transition: transform var(--ac-transition);
        }
        .ac-nav-link:hover { color: var(--ac-ink); }
        .ac-nav-link:hover::after { transform: scaleX(1); }
        .ac-nav-link.is-active { color: var(--ac-ink); font-weight: 600; }
        .ac-nav-link.is-active::after { transform: scaleX(1); }
        .ac-header-right { display: flex; align-items: center; gap: 16px; }
        .ac-search {
            display: flex; align-items: center; gap: 8px;
            background: rgba(255,255,255,0.8); border: 1px solid var(--ac-border);
            border-radius: 999px; padding: 0 16px; height: 38px; width: 160px;
            transition: all var(--ac-transition);
        }
        .ac-search:focus-within { width: 220px; border-color: var(--ac-bronze); box-shadow: 0 0 0 2px rgba(168,124,74,0.15); }
        .ac-search svg { width: 14px; height: 14px; fill: none; stroke: var(--ac-text-muted); flex-shrink: 0; }
        .ac-search-input { border: none; outline: none; background: transparent; font-size: 13px; width: 100%; }
        .ac-search-input::placeholder { color: var(--ac-text-muted); }
        .ac-nav-cta {
            background: var(--ac-bronze); color: var(--ac-ink); border: none;
            border-radius: 999px; padding: 0 24px; height: 38px; font-size: 14px;
            font-weight: 600; cursor: pointer; transition: all var(--ac-transition);
            display: inline-flex; align-items: center; gap: 6px;
        }
        .ac-nav-cta:hover { background: #946B3D; color: #fff; }
        .ac-login {
            background: none; border: none; font-size: 14px; color: var(--ac-ink);
            cursor: pointer; padding: 4px 0; position: relative; line-height: 1;
        }
        .ac-login::after {
            content: ""; position: absolute; bottom: -2px; left: 0; width: 100%; height: 1px;
            background: var(--ac-bronze); transform: scaleX(0); transition: transform var(--ac-transition);
        }
        .ac-login:hover::after { transform: scaleX(1); }

        .ac-menu-toggle {
            display: none; background: none; border: none; cursor: pointer;
            width: 40px; height: 40px; padding: 8px; z-index: 1201;
        }
        .ac-menu-toggle span {
            display: block; width: 24px; height: 2px; background: var(--ac-ink);
            margin: 5px 0; transition: all var(--ac-transition); border-radius: 2px;
        }
        .ac-menu-toggle.is-active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
        .ac-menu-toggle.is-active span:nth-child(2) { opacity: 0; }
        .ac-menu-toggle.is-active span:nth-child(3) { transform: rotate(-45deg) translate(6px, -6px); }

        .ac-mobile-panel {
            position: fixed; top: 0; right: -320px; width: 320px; height: 100%;
            background: var(--ac-ink); z-index: 1200; transition: right 0.3s ease;
            padding: 24px; overflow-y: auto;
        }
        .ac-mobile-panel.is-open { right: 0; }
        .ac-mobile-panel-overlay {
            position: fixed; top: 0; left: 0; width: 100%; height: 100%;
            background: rgba(0,0,0,0.4); z-index: 1100; opacity: 0; visibility: hidden;
            transition: all 0.3s;
        }
        .ac-mobile-panel-overlay.is-open { opacity: 1; visibility: visible; }
        .ac-mobile-panel-logo { display: flex; align-items: center; gap: 10px; color: var(--ac-paper); font-size: 18px; font-weight: 700; margin-bottom: 32px; }
        .ac-mobile-nav-links { display: flex; flex-direction: column; }
        .ac-mobile-nav-links a {
            color: var(--ac-paper); font-size: 16px; padding: 14px 8px;
            border-bottom: 1px solid rgba(255,255,255,0.08); transition: color var(--ac-transition);
        }
        .ac-mobile-nav-links a:hover { color: var(--ac-bronze); }
        .ac-mobile-nav-links a.is-active { color: var(--ac-bronze); font-weight: 600; }
        .ac-mobile-bottom { margin-top: 32px; display: flex; flex-direction: column; gap: 12px; }
        .ac-mobile-bottom .ac-btn { width: 100%; }
        .ac-mobile-close {
            position: absolute; top: 20px; right: 20px; background: none; border: none;
            color: var(--ac-paper); font-size: 28px; cursor: pointer; line-height: 1;
        }

        .ac-hero {
            position: relative;
            background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            padding: 120px 0;
            display: flex; align-items: center;
        }
        .ac-hero::before {
            content: ""; position: absolute; top: 0; left: 0; width: 100%; height: 100%;
            background: linear-gradient(90deg, rgba(25,29,28,0.95) 0%, rgba(25,29,28,0.82) 40%, rgba(25,29,28,0.45) 70%, rgba(25,29,28,0.2) 100%);
        }
        .ac-hero .ac-container { position: relative; z-index: 2; display: flex; align-items: center; justify-content: space-between; gap: 48px; }
        .ac-hero-content { max-width: 560px; }
        .ac-hero-eyebrow {
            display: inline-flex; align-items: center; gap: 8px; font-size: 13px;
            font-weight: 600; color: var(--ac-bronze); letter-spacing: 0.08em; margin-bottom: 16px;
        }
        .ac-hero-eyebrow::before { content: ""; width: 32px; height: 1px; background: var(--ac-bronze); }
        .ac-hero-title {
            font-size: clamp(36px, 5.5vw, 56px); font-weight: 900; line-height: 1.15;
            letter-spacing: 0.01em; color: #fff; margin-bottom: 20px;
        }
        .ac-hero-subtitle { font-size: 16px; line-height: 1.75; color: rgba(255,255,255,0.75); max-width: 440px; margin-bottom: 36px; }
        .ac-hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }
        .ac-hero-card {
            width: 400px; flex-shrink: 0; background: var(--ac-white);
            border-radius: var(--ac-radius-lg); padding: 16px; box-shadow: var(--ac-shadow-card);
        }
        .ac-hero-card-img { border-radius: 12px; overflow: hidden; height: 200px; margin-bottom: 16px; }
        .ac-hero-card-img img { width: 100%; height: 100%; object-fit: cover; }
        .ac-hero-card-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; padding: 4px 4px 8px; }
        .ac-hero-stat { text-align: center; }
        .ac-hero-stat-num { font-size: 26px; font-weight: 800; color: var(--ac-ink); line-height: 1.2; font-variant-numeric: tabular-nums; }
        .ac-hero-stat-label { font-size: 12px; color: var(--ac-text-muted); }
        .ac-hero-stat-note {
            grid-column: 1 / -1; text-align: center; font-size: 11px;
            color: var(--ac-text-muted); padding-top: 8px; border-top: 1px solid var(--ac-border);
        }

        .ac-trust-bar { border-bottom: 1px solid var(--ac-border); }
        .ac-trust-inner {
            display: flex; align-items: center; justify-content: space-between;
            padding: 28px 0; gap: 16px; flex-wrap: wrap;
        }
        .ac-trust-item {
            display: flex; align-items: center; gap: 10px; font-size: 14px;
            color: var(--ac-text-secondary); font-weight: 500; position: relative;
        }
        .ac-trust-item:not(:last-child)::after {
            content: ""; width: 1px; height: 16px; background: var(--ac-border); margin-left: 24px;
        }

        .ac-services-grid { display: grid; gap: 24px; grid-template-columns: 1.2fr 1fr; }
        .ac-service-card {
            background: var(--ac-white); border: 1px solid var(--ac-border);
            border-radius: var(--ac-radius-md); padding: 32px; text-decoration: none;
            transition: all var(--ac-transition); position: relative; overflow: hidden;
            display: flex; flex-direction: column;
        }
        .ac-service-card:hover { box-shadow: var(--ac-shadow-hover); transform: translateY(-4px); }
        .ac-service-card--img { padding: 0; }
        .ac-service-card--img .ac-service-card-bg { position: relative; height: 200px; overflow: hidden; }
        .ac-service-card--img .ac-service-card-bg img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
        .ac-service-card:hover .ac-service-card-bg img { transform: scale(1.05); }
        .ac-service-card--img .ac-service-card-body { padding: 32px; }
        .ac-service-card--solid { background: var(--ac-paper); border-color: rgba(25,29,28,0.1); }
        .ac-service-card--border { background: var(--ac-white); }
        .ac-service-card-num { font-size: 14px; font-weight: 700; color: var(--ac-bronze); margin-bottom: 12px; letter-spacing: 0.04em; }
        .ac-service-card-title { font-size: 20px; font-weight: 700; line-height: 1.35; margin-bottom: 12px; }
        .ac-service-card-desc { font-size: 14px; color: var(--ac-text-secondary); line-height: 1.7; margin-bottom: 20px; flex-grow: 1; }
        .ac-service-card-link {
            display: inline-flex; align-items: center; gap: 8px; font-size: 14px;
            font-weight: 600; color: var(--ac-ink); transition: all var(--ac-transition);
        }
        .ac-service-card-link svg { transition: transform var(--ac-transition); }
        .ac-service-card:hover .ac-service-card-link svg { transform: translateX(4px); }
        .ac-service-card-link:hover { color: var(--ac-bronze); }
        .ac-services-row { margin-top: 24px; }

        .ac-metrics { background: var(--ac-ink); position: relative; padding: 80px 0; }
        .ac-metrics::before {
            content: ""; position: absolute; top: 0; left: 0; width: 100%; height: 100%;
            background: radial-gradient(circle at 20% 50%, rgba(168,124,74,0.12) 0%, transparent 40%);
        }
        .ac-metrics-grid { display: grid; grid-template-columns: repeat(4, 1fr); position: relative; z-index: 1; }
        .ac-metric { text-align: center; padding: 0 24px; position: relative; }
        .ac-metric:not(:last-child)::after {
            content: ""; position: absolute; right: 0; top: 20%; height: 60%;
            width: 1px; background: rgba(255,255,255,0.12);
        }
        .ac-metric-label { font-size: 12px; color: rgba(255,255,255,0.5); letter-spacing: 0.06em; margin-bottom: 8px; }
        .ac-metric-num { font-size: 60px; font-weight: 800; color: var(--ac-bronze); line-height: 1; margin-bottom: 10px; font-variant-numeric: tabular-nums; }
        .ac-metric-desc { font-size: 13px; color: rgba(255,255,255,0.45); }

        .ac-latest-head { display: flex; justify-content: space-between; align-items: flex-end; margin-bottom: 32px; }
        .ac-latest-link {
            font-size: 14px; font-weight: 600; color: var(--ac-ink);
            border-bottom: 1px solid var(--ac-bronze); padding-bottom: 4px; text-decoration: none;
        }
        .ac-latest-link:hover { color: var(--ac-bronze); }
        .ac-latest-grid { display: grid; grid-template-columns: 7fr 5fr; gap: 32px; }
        .ac-latest-main {
            background: var(--ac-white); border-radius: var(--ac-radius-md);
            overflow: hidden; border: 1px solid var(--ac-border); text-decoration: none;
            transition: all var(--ac-transition); display: block;
        }
        .ac-latest-main:hover { box-shadow: var(--ac-shadow-hover); transform: translateY(-4px); }
        .ac-latest-main-img { height: 220px; overflow: hidden; }
        .ac-latest-main-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
        .ac-latest-main:hover .ac-latest-main-img img { transform: scale(1.05); }
        .ac-latest-main-body { padding: 24px; }
        .ac-latest-main-tag { margin-bottom: 10px; }
        .ac-latest-main-title { font-size: 20px; font-weight: 700; line-height: 1.35; margin-bottom: 8px; }
        .ac-latest-main-summary { font-size: 14px; color: var(--ac-text-secondary); margin-bottom: 14px; line-height: 1.6; }
        .ac-latest-main-date { font-size: 13px; color: var(--ac-text-muted); }
        .ac-latest-list { display: flex; flex-direction: column; }
        .ac-latest-item { padding: 20px 0; border-bottom: 1px solid var(--ac-border); text-decoration: none; display: block; transition: padding var(--ac-transition); }
        .ac-latest-item:first-child { padding-top: 0; }
        .ac-latest-item:last-child { border-bottom: none; padding-bottom: 0; }
        .ac-latest-item:hover { padding-left: 8px; }
        .ac-latest-item-title { display: block; font-size: 16px; font-weight: 600; margin-bottom: 6px; line-height: 1.4; }
        .ac-latest-item-summary {
            display: block; font-size: 13px; color: var(--ac-text-secondary);
            margin-bottom: 8px; line-height: 1.5;
            overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
        }
        .ac-latest-item-meta { display: flex; justify-content: space-between; align-items: center; font-size: 12px; color: var(--ac-text-muted); }

        .ac-empty-state { text-align: center; padding: 96px 0; display: flex; flex-direction: column; align-items: center; gap: 8px; }
        .ac-empty-icon {
            width: 56px; height: 56px; border-radius: 50%; border: 2px solid var(--ac-border);
            display: flex; align-items: center; justify-content: center; margin-bottom: 12px;
        }
        .ac-empty-icon::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--ac-border); }
        .ac-empty-state p { color: var(--ac-text-muted); font-size: 15px; margin: 0; }
        .ac-empty-state .ac-text-muted { font-size: 13px; }

        .ac-faq-grid { display: grid; grid-template-columns: 4fr 8fr; gap: 64px; }
        .ac-faq-title { font-size: 32px; font-weight: 800; line-height: 1.3; margin-bottom: 16px; }
        .ac-faq-desc { font-size: 15px; color: var(--ac-text-secondary); line-height: 1.7; margin-bottom: 24px; }
        .ac-faq-contact {
            display: inline-flex; align-items: center; gap: 8px; font-size: 14px;
            font-weight: 600; color: var(--ac-ink); border-bottom: 1px solid var(--ac-bronze);
            padding-bottom: 4px; text-decoration: none;
        }
        .ac-faq-contact:hover { color: var(--ac-bronze); }
        .ac-accordion { border-top: 1px solid var(--ac-border); }
        .ac-accordion-item { border-bottom: 1px solid var(--ac-border); }
        .ac-accordion-header {
            width: 100%; background: none; border: none; padding: 20px 48px 20px 0;
            font-size: 16px; font-weight: 600; text-align: left; cursor: pointer;
            position: relative; color: var(--ac-ink); transition: color var(--ac-transition);
        }
        .ac-accordion-header:hover { color: var(--ac-bronze); }
        .ac-accordion-header::after {
            content: "+"; position: absolute; right: 16px; top: 50%;
            transform: translateY(-50%); font-size: 20px; font-weight: 300;
            color: var(--ac-bronze); transition: transform var(--ac-transition);
        }
        .ac-accordion-item.is-open .ac-accordion-header::after {
            transform: translateY(-50%) rotate(45deg);
        }
        .ac-accordion-panel { max-height: 0; overflow: hidden; transition: max-height 0.35s ease; }
        .ac-accordion-panel-inner { padding: 0 48px 20px 0; font-size: 14px; color: var(--ac-text-secondary); line-height: 1.75; }

        .ac-cta-section { padding: 0 0 96px; }
        .ac-cta-block {
            background: var(--ac-ink); border-radius: var(--ac-radius-lg); padding: 64px;
            display: flex; align-items: center; justify-content: space-between; gap: 48px;
            position: relative; overflow: hidden;
        }
        .ac-cta-block::before {
            content: ""; position: absolute; top: 0; right: 0; width: 40%; height: 100%;
            background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
            opacity: 0.2;
        }
        .ac-cta-content { position: relative; z-index: 1; }
        .ac-cta-title { font-size: 28px; font-weight: 800; color: #fff; margin-bottom: 12px; line-height: 1.3; }
        .ac-cta-desc { font-size: 15px; color: rgba(255,255,255,0.65); max-width: 400px; }
        .ac-cta-actions { position: relative; z-index: 1; }

        .ac-modal {
            background: var(--ac-paper); border-radius: var(--ac-radius-lg);
            padding: 40px; border: none; max-width: 540px; overflow: visible;
        }
        .ac-modal-title { font-size: 24px; font-weight: 800; margin-bottom: 8px; }
        .ac-modal-desc { font-size: 14px; color: var(--ac-text-secondary); margin-bottom: 24px; line-height: 1.6; }
        .ac-form-group { margin-bottom: 16px; }
        .ac-form-label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; color: var(--ac-ink); }
        .ac-form-control {
            width: 100%; height: 46px; border: 1px solid var(--ac-border);
            border-radius: var(--ac-radius-sm); background: var(--ac-white); padding: 0 16px;
            font-size: 14px; transition: all var(--ac-transition); outline: none;
        }
        .ac-form-control:focus { border-color: var(--ac-bronze); box-shadow: 0 2px 0 var(--ac-bronze); }
        textarea.ac-form-control { height: 100px; padding: 12px 16px; resize: vertical; }
        .ac-form-select {
            appearance: none;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23635E57' stroke-width='1.5' fill='none'/%3E%3C/svg%3E");
            background-repeat: no-repeat; background-position: right 16px center;
            padding-right: 40px;
        }
        .ac-form-privacy { font-size: 12px; color: var(--ac-text-muted); text-align: center; margin-top: 12px; line-height: 1.6; }
        .ac-form-privacy a { color: var(--ac-text-muted); text-decoration: underline; }

        .ac-footer { background: var(--ac-ink); color: var(--ac-paper); padding: 72px 0 32px; }
        .ac-footer-grid {
            display: grid; grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 48px; padding-bottom: 48px; border-bottom: 1px solid rgba(255,255,255,0.1);
        }
        .ac-footer-logo {
            font-size: 20px; font-weight: 800; color: #fff; margin-bottom: 12px;
            display: flex; align-items: center; gap: 8px;
        }
        .ac-footer-desc { font-size: 14px; color: rgba(255,255,255,0.5); line-height: 1.7; max-width: 280px; }
        .ac-footer-col-title { font-size: 14px; font-weight: 700; color: #fff; margin-bottom: 16px; }
        .ac-footer-col a {
            display: block; font-size: 14px; color: rgba(255,255,255,0.45);
            padding: 6px 0; transition: color var(--ac-transition);
        }
        .ac-footer-col a:hover { color: #fff; }
        .ac-footer-bottom {
            display: flex; justify-content: space-between; align-items: center;
            padding-top: 24px; font-size: 12px; color: rgba(255,255,255,0.35);
        }
        .ac-footer-bottom a { color: rgba(255,255,255,0.35); }
        .ac-footer-bottom a:hover { color: #fff; }

        @media (max-width: 1024px) {
            .ac-nav { display: none; }
            .ac-header-right .ac-search { display: none; }
            .ac-header-right .ac-login { display: none; }
            .ac-menu-toggle { display: block; }
            .ac-hero { padding: 80px 0; }
            .ac-hero .ac-container { flex-direction: column; gap: 32px; }
            .ac-hero-card { width: 100%; max-width: 480px; }
            .ac-services-grid { grid-template-columns: 1fr; }
            .ac-metrics-grid { grid-template-columns: 1fr 1fr; gap: 32px 0; }
            .ac-metric:nth-child(2)::after { display: none; }
            .ac-metric:nth-child(4)::after { display: none; }
            .ac-latest-grid { grid-template-columns: 1fr; }
            .ac-faq-grid { grid-template-columns: 1fr; gap: 32px; }
            .ac-cta-block { flex-direction: column; padding: 48px; align-items: flex-start; }
            .ac-footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
        }

        @media (max-width: 600px) {
            .ac-container { padding-left: 16px; padding-right: 16px; }
            .ac-header-inner { height: 60px; padding: 0 16px; }
            .ac-logo { font-size: 16px; }
            .ac-nav-cta { display: none; }
            .ac-hero { padding: 56px 0; }
            .ac-hero-title { font-size: 32px; }
            .ac-hero-subtitle { font-size: 15px; }
            .ac-hero-card { border-radius: 14px; padding: 12px; }
            .ac-hero-card-img { height: 160px; }
            .ac-hero-stat-num { font-size: 22px; }
            .ac-trust-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; padding: 20px 0; }
            .ac-trust-item:not(:last-child)::after { display: none; }
            .ac-section-title { font-size: 24px; }
            .ac-section-head { margin-bottom: 32px; }
            .ac-metrics { padding: 48px 0; }
            .ac-metric-num { font-size: 40px; }
            .ac-metrics-grid { grid-template-columns: 1fr 1fr; }
            .ac-metric { padding: 0 8px; }
            .ac-metric:nth-child(2)::after { display: none; }
            .ac-latest-main-img { height: 180px; }
            .ac-latest-main-body { padding: 20px; }
            .ac-cta-block { padding: 32px 20px; gap: 24px; border-radius: 14px; }
            .ac-cta-actions .ac-btn { width: 100%; }
            .ac-footer { padding: 48px 0 24px; }
            .ac-footer-grid { grid-template-columns: 1fr; gap: 32px; }
            .ac-footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
            .ac-modal { padding: 32px 20px; }
            .ac-accordion-header { padding: 16px 40px 16px 0; font-size: 15px; }
            .ac-accordion-panel-inner { padding: 0 40px 16px 0; font-size: 13px; }
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --ac-ink: #191D1C;
            --ac-paper: #F4F0E8;
            --ac-white: #FFFFFF;
            --ac-bronze: #A87C4A;
            --ac-green: #2F5044;
            --ac-secondary: #635E57;
            --ac-muted: #A39D92;
            --ac-line: #E4DED2;
            --ac-radius: 14px;
            --ac-radius-btn: 8px;
            --ac-radius-card: 14px;
            --ac-shadow: 0 2px 8px rgba(25,29,28,0.04), 0 8px 24px rgba(25,29,28,0.06);
            --ac-shadow-hover: 0 12px 32px rgba(25,29,28,0.12);
            --ac-transition: 0.25s ease;
            --ac-font: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--ac-font);
            font-size: 16px;
            line-height: 1.75;
            color: var(--ac-ink);
            background: var(--ac-paper);
            -webkit-font-smoothing: antialiased;
        }

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

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

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

        /* ===== 容器 ===== */
        .ac-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 按钮 ===== */
        .ac-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 46px;
            padding: 0 28px;
            border-radius: var(--ac-radius-btn);
            font-size: 15px;
            font-weight: 600;
            line-height: 1;
            border: 0;
            cursor: pointer;
            text-decoration: none;
            transition: all var(--ac-transition);
            white-space: nowrap;
        }

        .ac-btn:focus {
            outline: 2px solid var(--ac-bronze);
            outline-offset: 2px;
        }

        .ac-btn:active {
            transform: translateY(1px);
        }

        .ac-btn-primary {
            background: var(--ac-ink);
            color: var(--ac-paper);
        }

        .ac-btn-primary:hover {
            background: #000;
            color: var(--ac-paper);
        }

        .ac-btn-highlight {
            background: var(--ac-bronze);
            color: var(--ac-white);
        }

        .ac-btn-highlight:hover {
            background: #946B3D;
            color: var(--ac-white);
        }

        .ac-btn-ghost {
            background: transparent;
            border: 1px solid var(--ac-ink);
            color: var(--ac-ink);
        }

        .ac-btn-ghost:hover {
            background: var(--ac-ink);
            color: var(--ac-paper);
        }

        .ac-btn-block {
            width: 100%;
        }

        .ac-btn-sm {
            height: 38px;
            padding: 0 20px;
            font-size: 14px;
        }

        /* ===== 导航 ===== */
        .ac-header {
            position: sticky;
            top: 0;
            z-index: 200;
            background: rgba(244, 240, 232, 0.96);
            border-bottom: 1px solid var(--ac-line);
        }

        .ac-header-inner {
            display: flex;
            align-items: center;
            height: 72px;
            gap: 24px;
        }

        .ac-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }

        .ac-logo-icon {
            width: 24px;
            height: 24px;
            flex-shrink: 0;
        }

        .ac-logo-text {
            font-size: 20px;
            font-weight: 900;
            color: var(--ac-ink);
            letter-spacing: 0.01em;
            display: flex;
            align-items: center;
        }

        .ac-logo-text span {
            font-weight: 300;
            color: var(--ac-bronze);
            margin-left: 8px;
            padding-left: 8px;
            border-left: 1px solid var(--ac-line);
        }

        .ac-nav {
            display: flex;
            gap: 24px;
            margin: 0 auto;
        }

        .ac-nav-link {
            position: relative;
            font-size: 15px;
            color: var(--ac-secondary);
            padding: 8px 0;
            transition: color var(--ac-transition);
        }

        .ac-nav-link:hover {
            color: var(--ac-ink);
        }

        .ac-nav-link::after {
            content: "";
            position: absolute;
            left: 0;
            right: 0;
            bottom: -2px;
            height: 2px;
            background: var(--ac-bronze);
            opacity: 0;
            transform: translateY(4px);
            transition: all var(--ac-transition);
        }

        .ac-nav-link:hover::after,
        .ac-nav-link.is-active::after {
            opacity: 1;
            transform: translateY(0);
        }

        .ac-nav-link.is-active {
            color: var(--ac-ink);
            font-weight: 600;
        }

        .ac-header-actions {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-left: auto;
        }

        .ac-search {
            position: relative;
            display: flex;
            align-items: center;
        }

        .ac-search svg {
            position: absolute;
            left: 10px;
            pointer-events: none;
        }

        .ac-search input {
            height: 36px;
            width: 160px;
            padding: 0 12px 0 34px;
            border: 1px solid var(--ac-line);
            border-radius: var(--ac-radius-btn);
            background: var(--ac-white);
            font-size: 13px;
            color: var(--ac-ink);
            outline: 0;
            transition: width var(--ac-transition), border-color var(--ac-transition);
        }

        .ac-search input:focus {
            width: 220px;
            border-color: var(--ac-bronze);
        }

        .ac-search input::placeholder {
            color: var(--ac-muted);
        }

        .ac-login {
            font-size: 14px;
            color: var(--ac-ink);
            padding: 6px 0;
        }

        .ac-login:hover {
            text-decoration: underline;
            text-underline-offset: 4px;
        }

        .ac-burger {
            display: none;
            background: none;
            border: 0;
            cursor: pointer;
            padding: 8px;
            margin-left: auto;
        }

        .ac-burger span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--ac-ink);
            margin: 4px 0;
            transition: background var(--ac-transition);
        }

        /* ===== Off-canvas 移动面板 ===== */
        .ac-offcanvas {
            background: var(--ac-ink);
            color: var(--ac-paper);
            width: 300px;
            padding: 24px;
        }

        .ac-offcanvas .close-button {
            color: var(--ac-paper);
            font-size: 28px;
            line-height: 1;
        }

        .ac-offcanvas .close-button:hover {
            color: var(--ac-bronze);
        }

        .ac-offcanvas-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 20px;
            font-weight: 800;
            color: var(--ac-paper);
            margin-top: 16px;
            margin-bottom: 32px;
        }

        .ac-offcanvas-nav {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .ac-offcanvas-nav a {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.65);
            padding: 12px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            transition: color var(--ac-transition), padding-left var(--ac-transition);
        }

        .ac-offcanvas-nav a:hover {
            color: var(--ac-paper);
            padding-left: 4px;
        }

        .ac-offcanvas-nav a.is-active {
            color: var(--ac-bronze);
            font-weight: 600;
        }

        .ac-offcanvas-footer {
            display: flex;
            flex-direction: column;
            gap: 12px;
            margin-top: 40px;
        }

        .ac-offcanvas-footer .ac-btn {
            width: 100%;
        }

        /* ===== 面包屑 ===== */
        .ac-breadcrumb {
            padding: 32px 0 8px;
            font-size: 13px;
            color: var(--ac-muted);
        }

        .ac-breadcrumb a {
            color: var(--ac-secondary);
        }

        .ac-breadcrumb a:hover {
            color: var(--ac-bronze);
        }

        .ac-breadcrumb .ac-breadcrumb-sep {
            margin: 0 8px;
            color: var(--ac-line);
        }

        .ac-breadcrumb .is-current {
            color: var(--ac-muted);
            cursor: default;
        }

        /* ===== 文章页 ===== */
        .ac-article-main {
            min-height: 420px;
        }

        .ac-article {
            max-width: 720px;
            margin: 0 auto;
            padding: 24px 0 72px;
        }

        .ac-article-header {
            margin-bottom: 40px;
            padding-bottom: 32px;
            border-bottom: 1px solid var(--ac-line);
        }

        .ac-article-tag {
            display: inline-flex;
            align-items: center;
            background: var(--ac-green);
            color: var(--ac-white);
            font-size: 12px;
            font-weight: 500;
            padding: 4px 14px;
            border-radius: 999px;
            margin-bottom: 20px;
        }

        .ac-article-header h1 {
            font-size: 32px;
            font-weight: 900;
            line-height: 1.3;
            letter-spacing: 0.01em;
            color: var(--ac-ink);
            margin: 0 0 20px;
        }

        .ac-article-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--ac-muted);
        }

        .ac-article-meta .ac-article-date {
            color: var(--ac-secondary);
        }

        .ac-article-body {
            font-size: 16px;
            line-height: 1.85;
            color: var(--ac-ink);
        }

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

        .ac-article-body h2 {
            font-size: 24px;
            font-weight: 800;
            line-height: 1.4;
            margin: 48px 0 16px;
            padding-left: 14px;
            border-left: 4px solid var(--ac-bronze);
        }

        .ac-article-body h3 {
            font-size: 20px;
            font-weight: 700;
            line-height: 1.4;
            margin: 40px 0 12px;
            padding-left: 14px;
            border-left: 4px solid var(--ac-ink);
        }

        .ac-article-body blockquote {
            background: var(--ac-paper);
            border-left: 3px solid var(--ac-bronze);
            margin: 32px 0;
            padding: 20px 24px;
            font-style: italic;
            color: var(--ac-secondary);
            border-radius: 0 8px 8px 0;
        }

        .ac-article-body ul,
        .ac-article-body ol {
            margin: 0 0 26px;
            padding-left: 24px;
        }

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

        .ac-article-body img {
            border-radius: var(--ac-radius-card);
            margin: 32px 0;
            width: 100%;
            height: auto;
        }

        .ac-article-body a {
            color: var(--ac-ink);
            text-decoration: underline;
            text-underline-offset: 4px;
            text-decoration-color: var(--ac-line);
        }

        .ac-article-body a:hover {
            color: var(--ac-bronze);
            text-decoration-color: var(--ac-bronze);
        }

        .ac-article-empty {
            text-align: center;
            padding: 96px 24px;
        }

        .ac-empty-icon {
            width: 68px;
            height: 68px;
            border: 1px solid var(--ac-line);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 24px;
        }

        .ac-empty-icon svg {
            width: 28px;
            height: 28px;
            stroke: var(--ac-muted);
        }

        .ac-article-empty p {
            font-size: 16px;
            color: var(--ac-muted);
            margin-bottom: 28px;
        }

        /* ===== 相关推荐 ===== */
        .ac-related {
            background: var(--ac-white);
            border-top: 1px solid var(--ac-line);
            padding: 72px 0 80px;
        }

        .ac-section-head {
            margin-bottom: 36px;
        }

        .ac-section-tag {
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.12em;
            color: var(--ac-bronze);
            text-transform: uppercase;
        }

        .ac-section-title {
            font-size: 28px;
            font-weight: 800;
            color: var(--ac-ink);
            margin: 8px 0 0;
            line-height: 1.3;
        }

        .ac-related-grid {
            row-gap: 24px;
        }

        .ac-related-grid .cell {
            display: flex;
        }

        .ac-related-card {
            display: flex;
            flex-direction: column;
            width: 100%;
            background: var(--ac-paper);
            border: 1px solid var(--ac-line);
            border-radius: var(--ac-radius-card);
            overflow: hidden;
            text-decoration: none;
            transition: transform var(--ac-transition), box-shadow var(--ac-transition);
        }

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

        .ac-related-media {
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--ac-line);
        }

        .ac-related-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

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

        .ac-related-body {
            padding: 20px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .ac-badge {
            display: inline-flex;
            align-self: flex-start;
            font-size: 12px;
            color: var(--ac-green);
            background: rgba(47, 80, 68, 0.08);
            padding: 4px 12px;
            border-radius: 999px;
            margin-bottom: 12px;
        }

        .ac-related-body h3 {
            font-size: 18px;
            font-weight: 700;
            line-height: 1.5;
            color: var(--ac-ink);
            margin: 0 0 12px;
        }

        .ac-related-date {
            font-size: 13px;
            color: var(--ac-muted);
            margin-top: auto;
        }

        .ac-related-foot {
            margin-top: 40px;
            text-align: center;
        }

        .ac-related-foot .ac-text-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--ac-ink);
            text-decoration: none;
            border-bottom: 1px solid var(--ac-line);
            padding-bottom: 4px;
            transition: border-color var(--ac-transition), color var(--ac-transition);
        }

        .ac-related-foot .ac-text-link:hover {
            color: var(--ac-bronze);
            border-color: var(--ac-bronze);
        }

        /* ===== 页脚 ===== */
        .ac-footer {
            background: var(--ac-ink);
            color: var(--ac-paper);
            padding: 64px 0 0;
        }

        .ac-footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 48px;
        }

        .ac-footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: var(--ac-paper);
            margin-bottom: 16px;
        }

        .ac-footer-logo svg {
            flex-shrink: 0;
        }

        .ac-footer-desc {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.55);
            max-width: 300px;
        }

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

        .ac-footer-col-title {
            font-size: 14px;
            font-weight: 700;
            color: var(--ac-white);
            margin-bottom: 10px;
        }

        .ac-footer-col a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.5);
            transition: color var(--ac-transition);
        }

        .ac-footer-col a:hover {
            color: var(--ac-bronze);
        }

        .ac-footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding: 20px 0;
            display: flex;
            justify-content: space-between;
            gap: 12px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.35);
        }

        .ac-footer-bottom a {
            color: rgba(255, 255, 255, 0.35);
        }

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

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .ac-nav,
            .ac-header-actions {
                display: none;
            }

            .ac-burger {
                display: block;
            }

            .ac-header-inner {
                height: 60px;
            }

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

        @media (max-width: 600px) {
            .ac-container {
                padding: 0 16px;
            }

            .ac-logo-text {
                font-size: 18px;
            }

            .ac-article-header h1 {
                font-size: 26px;
            }

            .ac-article-body {
                font-size: 15px;
            }

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

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

            .ac-related {
                padding: 56px 0 64px;
            }

            .ac-section-title {
                font-size: 24px;
            }

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

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

/* roulang page: category1 */
/* ========== 设计变量 ========== */
        :root {
            --ac-ink: #191D1C;
            --ac-paper: #F4F0E8;
            --ac-white: #FFFFFF;
            --ac-copper: #A87C4A;
            --ac-copper-dark: #946B3D;
            --ac-green: #2F5044;
            --ac-text-secondary: #635E57;
            --ac-text-muted: #A39D92;
            --ac-border: #E4DED2;
            --ac-radius-sm: 8px;
            --ac-radius-md: 14px;
            --ac-radius-lg: 20px;
            --ac-shadow-sm: 0 2px 8px rgba(25,29,28,0.04), 0 8px 24px rgba(25,29,28,0.06);
            --ac-shadow-hover: 0 12px 32px rgba(25,29,28,0.12);
            --ac-transition: 0.25s ease;
            --ac-container-max: 1200px;
            --ac-space: 96px;
            --ac-space-tablet: 64px;
            --ac-space-mobile: 48px;
        }

        /* ========== Reset / Base ========== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            margin: 0;
            font-family: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
            font-size: 16px;
            line-height: 1.75;
            background: var(--ac-paper);
            color: var(--ac-ink);
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--ac-ink);
            text-decoration: none;
            transition: color var(--ac-transition);
        }
        a:hover {
            color: var(--ac-copper);
        }
        h1, h2, h3, h4, h5, h6 {
            margin: 0;
            line-height: 1.2;
            color: var(--ac-ink);
        }
        p {
            margin: 0;
        }
        img {
            max-width: 100%;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
        }
        .grid-x {
            margin-left: 0;
            margin-right: 0;
        }

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

        /* ========== 按钮 ========== */
        .ac-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 46px;
            padding: 0 28px;
            border-radius: var(--ac-radius-sm);
            font-size: 15px;
            font-weight: 600;
            line-height: 1;
            border: 1px solid transparent;
            cursor: pointer;
            text-decoration: none;
            transition: all var(--ac-transition);
            white-space: nowrap;
        }
        .ac-btn:focus-visible {
            outline: 2px solid var(--ac-copper);
            outline-offset: 2px;
        }
        .ac-btn:active {
            transform: translateY(1px);
        }
        .ac-btn-copper {
            background: var(--ac-copper);
            color: var(--ac-ink);
        }
        .ac-btn-copper:hover {
            background: var(--ac-copper-dark);
            color: var(--ac-white);
        }
        .ac-btn-dark {
            background: var(--ac-ink);
            color: var(--ac-paper);
        }
        .ac-btn-dark:hover {
            background: #000;
            color: var(--ac-white);
        }
        .ac-btn-ghost {
            background: transparent;
            border-color: var(--ac-ink);
            color: var(--ac-ink);
        }
        .ac-btn-ghost:hover {
            background: var(--ac-ink);
            color: var(--ac-paper);
        }
        .ac-btn-block {
            width: 100%;
        }

        /* ========== 标签 / 徽章 ========== */
        .ac-kicker {
            display: inline-flex;
            align-items: center;
            height: 28px;
            padding: 0 14px;
            background: rgba(168, 124, 74, 0.12);
            color: var(--ac-copper-dark);
            border-radius: 999px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.04em;
            margin-bottom: 20px;
        }
        .ac-kicker-light {
            background: rgba(168, 124, 74, 0.22);
            color: #F4F0E8;
        }

        /* ========== 区块标题 ========== */
        .ac-section-head {
            max-width: 620px;
            margin-bottom: 56px;
        }
        .ac-section-tag {
            display: inline-block;
            font-size: 13px;
            color: var(--ac-copper);
            font-weight: 700;
            letter-spacing: 0.06em;
            margin-bottom: 12px;
        }
        .ac-section-head h2 {
            font-size: 32px;
            font-weight: 800;
            color: var(--ac-ink);
            line-height: 1.22;
            margin-bottom: 12px;
        }
        .ac-section-head p {
            font-size: 15px;
            line-height: 1.75;
            color: var(--ac-text-secondary);
        }

        /* ========== 导航 / Header ========== */
        .ac-header {
            position: sticky;
            top: 0;
            z-index: 100;
            height: 72px;
            background: rgba(244, 240, 232, 0.96);
            border-bottom: 1px solid var(--ac-border);
            backdrop-filter: none;
        }
        .ac-header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            gap: 24px;
        }
        .ac-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: var(--ac-ink);
            text-decoration: none;
            flex-shrink: 0;
        }
        .ac-logo-icon {
            flex-shrink: 0;
        }
        .ac-logo-sub {
            font-weight: 400;
            color: var(--ac-text-secondary);
        }
        .ac-nav {
            display: flex;
            align-items: center;
            gap: 30px;
            flex: 1;
            justify-content: center;
        }
        .ac-nav-link {
            position: relative;
            font-size: 15px;
            font-weight: 500;
            color: var(--ac-text-secondary);
            text-decoration: none;
            padding: 10px 0;
            transition: color var(--ac-transition);
        }
        .ac-nav-link:hover {
            color: var(--ac-ink);
        }
        .ac-nav-link.is-active {
            color: var(--ac-ink);
            font-weight: 700;
        }
        .ac-nav-link.is-active::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 100%;
            height: 2px;
            background: var(--ac-copper);
        }
        .ac-header-actions {
            display: flex;
            align-items: center;
            gap: 18px;
            flex-shrink: 0;
        }
        .ac-search {
            display: flex;
            align-items: center;
            position: relative;
        }
        .ac-search input {
            width: 160px;
            height: 38px;
            padding: 0 14px;
            border: 1px solid var(--ac-border);
            border-radius: 999px;
            background: var(--ac-white);
            font-size: 14px;
            color: var(--ac-ink);
            transition: width var(--ac-transition), border-color var(--ac-transition);
        }
        .ac-search input:focus {
            width: 220px;
            border-color: var(--ac-copper);
            outline: none;
        }
        .ac-search input::placeholder {
            color: var(--ac-text-muted);
        }
        .ac-login {
            font-size: 15px;
            font-weight: 600;
            color: var(--ac-ink);
            text-decoration: none;
            padding: 6px 0;
            border-bottom: 1px solid transparent;
        }
        .ac-login:hover {
            border-bottom-color: var(--ac-ink);
            color: var(--ac-ink);
        }
        .ac-burger {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            width: 42px;
            height: 42px;
            padding: 10px;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            align-items: center;
        }
        .ac-burger span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--ac-ink);
            border-radius: 2px;
        }

        /* ========== 分类页 Hero ========== */
        .ac-cat-hero {
            position: relative;
            padding: 88px 0 96px;
            background: var(--ac-ink);
            overflow: hidden;
        }
        .ac-cat-hero-bg {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-size: cover;
            background-position: center;
            opacity: 0.55;
        }
        .ac-cat-hero-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, rgba(25, 29, 28, 0.92) 0%, rgba(25, 29, 28, 0.62) 55%, rgba(25, 29, 28, 0.35) 100%);
        }
        .ac-cat-hero-content {
            position: relative;
            z-index: 2;
            max-width: 720px;
        }
        .ac-breadcrumb {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 28px;
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }
        .ac-breadcrumb a {
            color: rgba(255, 255, 255, 0.75);
            text-decoration: none;
        }
        .ac-breadcrumb a:hover {
            color: var(--ac-copper);
        }
        .ac-breadcrumb span {
            color: rgba(255, 255, 255, 0.5);
        }
        .ac-cat-hero h1 {
            font-size: 40px;
            font-weight: 900;
            color: #F4F0E8;
            line-height: 1.15;
            margin-bottom: 16px;
        }
        .ac-cat-hero-desc {
            font-size: 17px;
            line-height: 1.75;
            color: rgba(255, 255, 255, 0.82);
            max-width: 560px;
            margin: 0;
        }

        /* ========== 左文右图 ========== */
        .ac-split {
            padding: var(--ac-space) 0;
            background: var(--ac-paper);
        }
        .ac-split .cell {
            padding: 0;
        }
        .ac-split-left {
            padding-right: 48px !important;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .ac-split-left h2 {
            font-size: 32px;
            font-weight: 800;
            color: var(--ac-ink);
            line-height: 1.25;
            margin-bottom: 20px;
        }
        .ac-split-left p.ac-split-desc {
            font-size: 15px;
            line-height: 1.85;
            color: var(--ac-text-secondary);
            margin-bottom: 16px;
        }
        .ac-split-right {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .ac-split-img {
            width: 100%;
            border-radius: var(--ac-radius-lg);
            box-shadow: var(--ac-shadow-sm);
            object-fit: cover;
            aspect-ratio: 4 / 3;
            transition: transform 0.5s ease, box-shadow var(--ac-transition);
        }
        .ac-split-img:hover {
            transform: scale(1.015);
            box-shadow: var(--ac-shadow-hover);
        }
        .ac-feature-list {
            margin-top: 24px;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .ac-feature-item {
            display: flex;
            gap: 14px;
            align-items: flex-start;
        }
        .ac-feature-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--ac-copper);
            margin-top: 9px;
            flex-shrink: 0;
        }
        .ac-feature-item h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--ac-ink);
            line-height: 1.4;
        }
        .ac-feature-item p {
            font-size: 14px;
            color: var(--ac-text-secondary);
            line-height: 1.6;
            margin-top: 4px;
        }

        /* ========== 时间线 ========== */
        .ac-timeline-zone {
            padding: var(--ac-space) 0;
            background: var(--ac-white);
            border-top: 1px solid var(--ac-border);
            border-bottom: 1px solid var(--ac-border);
        }
        .ac-timeline {
            position: relative;
            margin-top: 24px;
        }
        .ac-timeline::before {
            content: "";
            position: absolute;
            left: 7px;
            top: 10px;
            bottom: 10px;
            width: 2px;
            background: var(--ac-border);
        }
        .ac-timeline-item {
            position: relative;
            padding: 0 0 44px 56px;
        }
        .ac-timeline-item:last-child {
            padding-bottom: 0;
        }
        .ac-timeline-dot {
            position: absolute;
            left: 0;
            top: 8px;
            width: 16px;
            height: 16px;
            border-radius: 50%;
            background: var(--ac-white);
            border: 3px solid var(--ac-copper);
            box-sizing: border-box;
        }
        .ac-timeline-item h4 {
            font-size: 18px;
            font-weight: 700;
            color: var(--ac-ink);
            margin-bottom: 6px;
        }
        .ac-timeline-item p {
            font-size: 14px;
            line-height: 1.7;
            color: var(--ac-text-secondary);
            max-width: 640px;
        }

        /* ========== 深色数据带 ========== */
        .ac-data-band {
            background: var(--ac-ink);
            padding: 72px 0;
        }
        .ac-data-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 48px;
        }
        .ac-data-cell {
            border-left: 3px solid var(--ac-copper);
            padding-left: 28px;
        }
        .ac-data-label {
            display: block;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.06em;
            color: rgba(255, 255, 255, 0.55);
            text-transform: uppercase;
        }
        .ac-data-value {
            display: block;
            font-size: 40px;
            font-weight: 900;
            line-height: 1.2;
            color: var(--ac-copper);
            margin: 10px 0 8px;
            font-variant-numeric: tabular-nums;
        }
        .ac-data-caption {
            display: block;
            font-size: 14px;
            line-height: 1.65;
            color: rgba(255, 255, 255, 0.72);
        }

        /* ========== FAQ ========== */
        .ac-faq-section {
            padding: var(--ac-space) 0;
            background: var(--ac-paper);
        }
        .ac-faq-grid .cell.faq-left {
            padding-right: 40px;
        }
        .ac-faq-left h2 {
            font-size: 28px;
            font-weight: 800;
            color: var(--ac-ink);
            margin-bottom: 12px;
            line-height: 1.3;
        }
        .ac-faq-left p {
            font-size: 15px;
            color: var(--ac-text-secondary);
            line-height: 1.75;
        }
        .ac-faq-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .ac-faq-item {
            background: var(--ac-white);
            border-radius: 12px;
            border: 1px solid var(--ac-border);
            overflow: hidden;
            transition: box-shadow var(--ac-transition);
        }
        .ac-faq-item:hover {
            box-shadow: var(--ac-shadow-sm);
        }
        .ac-faq-question {
            width: 100%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 20px;
            padding: 20px 24px;
            background: none;
            border: none;
            font-size: 16px;
            font-weight: 600;
            color: var(--ac-ink);
            cursor: pointer;
            text-align: left;
            transition: color var(--ac-transition);
        }
        .ac-faq-question:hover {
            color: var(--ac-copper-dark);
        }
        .ac-faq-icon {
            position: relative;
            width: 18px;
            height: 18px;
            flex-shrink: 0;
        }
        .ac-faq-icon::before,
        .ac-faq-icon::after {
            content: "";
            position: absolute;
            background: var(--ac-ink);
            transition: transform 0.3s ease, background 0.3s ease;
            border-radius: 2px;
        }
        .ac-faq-icon::before {
            width: 18px;
            height: 2px;
            top: 8px;
            left: 0;
        }
        .ac-faq-icon::after {
            width: 2px;
            height: 18px;
            top: 0;
            left: 8px;
        }
        .ac-faq-item.is-open .ac-faq-icon::after {
            transform: rotate(90deg);
            background: var(--ac-copper);
        }
        .ac-faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.3s ease;
            padding: 0 24px;
        }
        .ac-faq-item.is-open .ac-faq-answer {
            max-height: 320px;
            padding: 0 24px 20px;
        }
        .ac-faq-answer p {
            font-size: 14px;
            line-height: 1.75;
            color: var(--ac-text-secondary);
        }

        /* ========== 底部 CTA ========== */
        .ac-cat-cta {
            padding: var(--ac-space) 0;
            background: var(--ac-white);
            text-align: center;
            border-bottom: 1px solid var(--ac-border);
        }
        .ac-cat-cta h2 {
            font-size: 30px;
            font-weight: 800;
            color: var(--ac-ink);
            max-width: 640px;
            margin: 0 auto 16px;
            line-height: 1.3;
        }
        .ac-cat-cta p {
            font-size: 15px;
            line-height: 1.75;
            color: var(--ac-text-secondary);
            max-width: 560px;
            margin: 0 auto 32px;
        }

        /* ========== 联系表单 ========== */
        .ac-contact {
            padding: var(--ac-space) 0;
            background: var(--ac-paper);
        }
        .ac-contact-grid .cell.contact-left {
            padding-right: 48px;
        }
        .ac-contact-left h2 {
            font-size: 30px;
            font-weight: 800;
            color: var(--ac-ink);
            margin-bottom: 12px;
            line-height: 1.3;
        }
        .ac-contact-left p {
            font-size: 15px;
            color: var(--ac-text-secondary);
            line-height: 1.75;
        }
        .ac-form {
            display: flex;
            flex-direction: column;
            gap: 18px;
            background: var(--ac-white);
            border: 1px solid var(--ac-border);
            border-radius: var(--ac-radius-lg);
            padding: 32px;
            box-shadow: var(--ac-shadow-sm);
        }
        .ac-form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }
        .ac-form input,
        .ac-form select,
        .ac-form textarea {
            width: 100%;
            height: 46px;
            padding: 0 16px;
            border: 1px solid var(--ac-border);
            border-radius: var(--ac-radius-sm);
            background: var(--ac-white);
            font-size: 15px;
            color: var(--ac-ink);
            transition: border-color var(--ac-transition), box-shadow var(--ac-transition);
        }
        .ac-form textarea {
            height: 120px;
            padding: 14px 16px;
            resize: vertical;
        }
        .ac-form select {
            appearance: none;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23A39D92' stroke-width='2' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 16px center;
            padding-right: 40px;
        }
        .ac-form input:focus,
        .ac-form select:focus,
        .ac-form textarea:focus {
            border-color: var(--ac-copper);
            box-shadow: 0 2px 0 var(--ac-copper);
            outline: none;
        }
        .ac-form input::placeholder,
        .ac-form textarea::placeholder {
            color: var(--ac-text-muted);
        }
        .ac-form-note {
            font-size: 12px;
            color: var(--ac-text-muted);
            margin-top: -6px;
            line-height: 1.6;
        }

        /* ========== 页脚 ========== */
        .ac-footer {
            background: var(--ac-ink);
            color: var(--ac-paper);
            padding: 72px 0 0;
        }
        .ac-footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 56px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.14);
        }
        .ac-footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: var(--ac-paper);
            margin-bottom: 16px;
        }
        .ac-footer-desc {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
            max-width: 280px;
        }
        .ac-footer-col {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .ac-footer-col-title {
            font-size: 14px;
            font-weight: 700;
            color: var(--ac-paper);
            margin-bottom: 8px;
        }
        .ac-footer-col a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            text-decoration: none;
            transition: color var(--ac-transition);
        }
        .ac-footer-col a:hover {
            color: var(--ac-copper);
        }
        .ac-footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            padding: 24px 0;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.45);
        }
        .ac-footer-bottom a {
            color: rgba(255, 255, 255, 0.6);
            text-decoration: none;
        }
        .ac-footer-bottom a:hover {
            color: var(--ac-copper);
        }

        /* ========== Off-canvas ========== */
        .ac-offcanvas {
            background: var(--ac-ink) !important;
            padding: 40px 28px;
        }
        .ac-offcanvas .close-button {
            color: rgba(255, 255, 255, 0.8);
        }
        .ac-offcanvas .close-button:hover {
            color: var(--ac-copper);
        }
        .ac-offcanvas-nav {
            display: flex;
            flex-direction: column;
            gap: 6px;
            margin-top: 32px;
            padding-bottom: 32px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.14);
        }
        .ac-offcanvas-nav a {
            font-size: 17px;
            font-weight: 600;
            color: rgba(255, 255, 255, 0.82);
            text-decoration: none;
            padding: 12px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .ac-offcanvas-nav a:last-child {
            border-bottom: none;
        }
        .ac-offcanvas-nav a.is-active {
            color: var(--ac-copper);
        }
        .ac-offcanvas-actions {
            margin-top: 28px;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .ac-offcanvas-login {
            text-align: center;
            font-size: 15px;
            color: rgba(255, 255, 255, 0.7);
            text-decoration: none;
        }
        .ac-offcanvas-login:hover {
            color: var(--ac-copper);
        }

        /* ========== 入场动效 ========== */
        .ac-fade-up {
            opacity: 0;
            transform: translateY(14px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }
        .ac-fade-up.is-visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* ========== 响应式 ========== */
        @media (max-width: 1024px) {
            :root {
                --ac-space: 72px;
            }
            .ac-nav {
                gap: 20px;
            }
            .ac-search input {
                width: 130px;
            }
            .ac-search input:focus {
                width: 170px;
            }
            .ac-split-left {
                padding-right: 24px !important;
            }
            .ac-data-grid {
                gap: 32px;
            }
            .ac-data-value {
                font-size: 34px;
            }
            .ac-faq-grid .cell.faq-left {
                padding-right: 20px;
            }
            .ac-contact-grid .cell.contact-left {
                padding-right: 24px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --ac-space: var(--ac-space-tablet);
            }
            .ac-header {
                height: 60px;
            }
            .ac-nav,
            .ac-login,
            .ac-search {
                display: none;
            }
            .ac-burger {
                display: flex;
            }
            .ac-header-actions .ac-btn {
                height: 38px;
                padding: 0 16px;
                font-size: 14px;
            }
            .ac-cat-hero {
                padding: 64px 0 72px;
            }
            .ac-cat-hero h1 {
                font-size: 34px;
            }
            .ac-cat-hero-desc {
                font-size: 16px;
            }
            .ac-section-head h2,
            .ac-split-left h2 {
                font-size: 26px;
            }
            .ac-split-left {
                padding-right: 0 !important;
                padding-bottom: 32px;
            }
            .ac-timeline {
                margin-top: 16px;
            }
            .ac-data-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .ac-faq-grid .cell.faq-left {
                padding-right: 0;
                padding-bottom: 32px;
            }
            .ac-contact-grid .cell.contact-left {
                padding-right: 0;
                padding-bottom: 32px;
            }
            .ac-form {
                padding: 24px;
            }
            .ac-footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 40px 24px;
            }
            .ac-cat-cta h2 {
                font-size: 26px;
            }
            .ac-cat-cta p {
                font-size: 14px;
            }
        }

        @media (max-width: 600px) {
            :root {
                --ac-space: var(--ac-space-mobile);
            }
            .ac-header-actions .ac-btn {
                display: none;
            }
            .ac-header-actions {
                gap: 0;
            }
            .ac-cat-hero {
                padding: 48px 0 56px;
            }
            .ac-cat-hero h1 {
                font-size: 30px;
            }
            .ac-form-row {
                grid-template-columns: 1fr;
            }
            .ac-footer-grid {
                grid-template-columns: 1fr;
            }
            .ac-footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
            .ac-data-value {
                font-size: 32px;
            }
            .ac-timeline-item {
                padding-left: 48px;
            }
        }

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

/* roulang page: category2 */
:root{
  --ac-ink:#191D1C;
  --ac-paper:#F4F0E8;
  --ac-white:#FFFFFF;
  --ac-bronze:#A87C4A;
  --ac-green:#2F5044;
  --ac-note:#635E57;
  --ac-weak:#A39D92;
  --ac-line:#E4DED2;
  --ac-shadow:0 2px 8px rgba(25,29,28,.04),0 8px 24px rgba(25,29,28,.06);
  --ac-shadow-lg:0 12px 32px rgba(25,29,28,.12);
  --ac-radius:14px;
  --ac-radius-lg:20px;
  --ac-space:96px;
}
*,*::before,*::after{box-sizing:border-box}
body{
  margin:0;
  background:var(--ac-paper);
  color:var(--ac-ink);
  font-family:"PingFang SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,figure,blockquote{margin:0}
ul,ol{list-style:none;margin:0;padding:0}
a{color:var(--ac-ink);text-decoration:none;transition:color .25s ease}
a:hover{color:var(--ac-bronze)}
img{max-width:100%;height:auto;display:block}
button,input{font-family:inherit;font-size:inherit}
.js .ac-fade{opacity:0;transform:translateY(14px);transition:opacity .6s ease,transform .6s ease}
.js .ac-fade.in{opacity:1;transform:none}
.ac-container{max-width:1200px;margin:0 auto;padding-left:24px;padding-right:24px}
.ac-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:46px;
  padding:0 28px;
  border:1px solid transparent;
  border-radius:8px;
  font-size:15px;
  font-weight:700;
  line-height:46px;
  cursor:pointer;
  text-align:center;
  background:var(--ac-ink);
  color:var(--ac-paper);
  transition:background .25s ease,border-color .25s ease,color .25s ease,transform .25s ease,box-shadow .25s ease;
}
.ac-btn:hover{background:#000;color:var(--ac-paper)}
.ac-btn-highlight{background:var(--ac-bronze);color:#fff;border-color:var(--ac-bronze)}
.ac-btn-highlight:hover{background:#946B3D;color:#fff;transform:translateY(-2px);box-shadow:0 10px 24px rgba(168,124,74,.25)}
.ac-btn-ghost{background:transparent;color:var(--ac-ink);border:1px solid var(--ac-ink)}
.ac-btn-ghost:hover{background:var(--ac-ink);color:var(--ac-paper);transform:translateY(-2px)}
.ac-btn:focus-visible{outline:2px solid var(--ac-bronze);outline-offset:2px}
.ac-btn-block{width:100%}
.ac-btn .ac-arrow{margin-left:6px;transition:transform .25s ease}
.ac-btn:hover .ac-arrow{transform:translateX(4px)}
.ac-header{
  position:sticky;
  top:0;
  z-index:100;
  height:72px;
  display:flex;
  align-items:center;
  background:rgba(244,240,232,.96);
  border-bottom:1px solid var(--ac-line);
}
.ac-header-inner{display:flex;align-items:center;gap:28px;min-height:72px}
.ac-logo{display:inline-flex;align-items:center;gap:10px;font-size:20px;font-weight:900;letter-spacing:.01em;white-space:nowrap}
.ac-logo-icon{flex:0 0 auto}
.ac-logo-suffix{font-weight:400;color:var(--ac-note)}
.ac-nav{display:flex;align-items:center;gap:26px}
.ac-nav-link{position:relative;padding:8px 2px;font-size:15px;font-weight:600;color:var(--ac-ink);line-height:1.4}
.ac-nav-link::after{
  content:"";
  position:absolute;
  left:0;
  bottom:0;
  width:100%;
  height:2px;
  background:var(--ac-bronze);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .25s ease;
}
.ac-nav-link:hover{color:var(--ac-ink)}
.ac-nav-link:hover::after,.ac-nav-link.is-active::after{transform:scaleX(1)}
.ac-nav-link.is-active{color:var(--ac-ink)}
.ac-header-actions{margin-left:auto;display:flex;align-items:center;gap:16px}
.ac-search{position:relative;display:flex;align-items:center}
.ac-search-input{
  height:38px;
  width:160px;
  border:1px solid var(--ac-line);
  border-radius:8px;
  background:#fff;
  padding:0 12px;
  font-size:14px;
  color:var(--ac-ink);
  outline:none;
  transition:width .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.ac-search-input:focus{
  width:220px;
  border-color:var(--ac-bronze);
  box-shadow:0 0 0 2px rgba(168,124,74,.15);
}
.ac-search-input::placeholder{color:var(--ac-weak)}
.ac-login-link{font-size:14px;font-weight:600;color:var(--ac-ink);padding:6px 2px;border-bottom:1px solid transparent;transition:border-color .25s ease}
.ac-login-link:hover{color:var(--ac-ink);border-color:var(--ac-bronze)}
.ac-burger{
  display:none;
  width:44px;
  height:44px;
  align-items:center;
  justify-content:center;
  flex-direction:column;
  gap:5px;
  background:transparent;
  border:1px solid var(--ac-line);
  border-radius:8px;
  cursor:pointer;
  padding:0;
}
.ac-burger span{display:block;width:18px;height:2px;background:var(--ac-ink);border-radius:2px}
.ac-mobile-menu{background:var(--ac-ink);color:var(--ac-paper);padding:24px}
.ac-mobile-menu .close-button{color:var(--ac-paper);opacity:.8}
.ac-mobile-menu .close-button:hover{color:var(--ac-bronze)}
.ac-mobile-menu .ac-logo{color:var(--ac-paper);margin-bottom:28px}
.ac-mobile-menu .ac-logo-suffix{color:rgba(255,255,255,.5)}
.ac-offcanvas-nav{display:flex;flex-direction:column}
.ac-offcanvas-nav a{
  display:block;
  padding:14px 0;
  border-bottom:1px solid rgba(255,255,255,.1);
  font-size:16px;
  font-weight:600;
  color:rgba(255,255,255,.8);
}
.ac-offcanvas-nav a:hover{color:var(--ac-paper)}
.ac-offcanvas-nav a.is-active{color:var(--ac-bronze)}
.ac-mobile-actions{display:flex;flex-direction:column;gap:12px;margin-top:28px}
.ac-breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  margin-bottom:24px;
  font-size:13px;
  color:var(--ac-weak);
}
.ac-breadcrumb a{color:var(--ac-weak)}
.ac-breadcrumb a:hover{color:var(--ac-bronze)}
.ac-breadcrumb-sep{color:var(--ac-line)}
.ac-breadcrumb span[aria-current]{color:var(--ac-ink);font-weight:600}
.ac-cat-hero{
  padding:88px 0;
  background:var(--ac-paper);
  border-bottom:1px solid var(--ac-line);
}
.ac-cat-hero h1{
  font-size:40px;
  font-weight:900;
  line-height:1.2;
  margin-bottom:18px;
  letter-spacing:.01em;
}
.ac-cat-lead{
  font-size:16px;
  line-height:1.8;
  color:var(--ac-note);
  max-width:480px;
  margin-bottom:32px;
}
.ac-cat-hero-actions{display:flex;flex-wrap:wrap;gap:14px}
.ac-hero-visual-wrap{
  display:flex;
  justify-content:center;
  align-items:center;
  min-height:320px;
}
.ac-hero-svg{width:300px;height:300px;max-width:100%}
.ac-eyebrow{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:12px;
  font-weight:700;
  letter-spacing:.1em;
  color:var(--ac-bronze);
  margin-bottom:14px;
}
.ac-eyebrow::before{content:"";width:24px;height:2px;background:var(--ac-bronze)}
.ac-eyebrow-light{color:var(--ac-bronze)}
.ac-eyebrow-light::before{background:var(--ac-bronze)}
.ac-editorial{
  padding:var(--ac-space) 0;
  background:var(--ac-white);
  border-bottom:1px solid var(--ac-line);
}
.ac-editorial h2{
  font-size:28px;
  font-weight:800;
  line-height:1.3;
  margin-bottom:20px;
}
.ac-editorial-copy p{
  color:var(--ac-note);
  font-size:16px;
  line-height:1.85;
  margin-bottom:18px;
}
.ac-editorial-copy p:last-child{margin-bottom:0}
.ac-quote-card{
  background:var(--ac-paper);
  border-radius:var(--ac-radius-lg);
  overflow:hidden;
  border-left:3px solid var(--ac-bronze);
  box-shadow:var(--ac-shadow);
}
.ac-quote-card img{
  height:200px;
  width:100%;
  object-fit:cover;
}
.ac-quote-card blockquote{
  padding:28px 28px 12px;
  font-size:17px;
  font-weight:600;
  line-height:1.85;
  color:var(--ac-ink);
}
.ac-quote-source{
  padding:0 28px 28px;
  font-size:13px;
  color:var(--ac-weak);
}
.ac-directions{
  padding:var(--ac-space) 0;
  background:var(--ac-paper);
}
.ac-directions-list{
  border-top:1px solid var(--ac-line);
  margin-top:40px;
}
.ac-directions-item{
  display:grid;
  grid-template-columns:56px 160px 1fr;
  gap:24px;
  align-items:center;
  padding:26px 12px;
  border-bottom:1px solid var(--ac-line);
  transition:background .25s ease;
}
.ac-directions-item:hover{background:var(--ac-white)}
.ac-directions-index{
  font-size:26px;
  font-weight:900;
  color:var(--ac-bronze);
  font-variant-numeric:tabular-nums;
}
.ac-directions-item h3{font-size:18px;font-weight:700;line-height:1.4}
.ac-directions-item p{font-size:15px;line-height:1.75;color:var(--ac-note)}
.ac-process{
  position:relative;
  padding:var(--ac-space) 0;
  background:var(--ac-ink);
  color:var(--ac-paper);
  overflow:hidden;
}
.ac-process::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  width:100%;
  height:100%;
  background-image:linear-gradient(rgba(255,255,255,.08) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.08) 1px,transparent 1px);
  background-size:72px 72px;
  pointer-events:none;
}
.ac-process .ac-container{position:relative;z-index:1}
.ac-process-head{max-width:640px}
.ac-process-head h2{
  font-size:28px;
  font-weight:800;
  color:var(--ac-paper);
  line-height:1.3;
  margin-bottom:14px;
}
.ac-process-head p{
  font-size:15px;
  color:rgba(255,255,255,.6);
  line-height:1.75;
}
.ac-process-steps{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:16px;
  margin-top:56px;
}
.ac-process-step{position:relative;padding:20px 0 0}
.ac-process-step::before{
  content:"";
  position:absolute;
  top:44px;
  left:-16px;
  width:100%;
  height:1px;
  background:rgba(255,255,255,.14);
}
.ac-process-step:first-child::before{display:none}
.ac-step-num{
  display:flex;
  align-items:center;
  justify-content:center;
  width:52px;
  height:52px;
  border:1px solid rgba(255,255,255,.2);
  border-radius:50%;
  font-size:14px;
  font-weight:700;
  color:var(--ac-bronze);
  background:var(--ac-ink);
  margin-bottom:20px;
  position:relative;
  z-index:1;
}
.ac-process-step h3{
  font-size:17px;
  font-weight:700;
  color:var(--ac-paper);
  margin-bottom:10px;
}
.ac-process-step p{
  font-size:14px;
  line-height:1.75;
  color:rgba(255,255,255,.6);
}
.ac-connect{
  padding:var(--ac-space) 0;
  background:var(--ac-paper);
}
.ac-connect-card{
  background:var(--ac-white);
  border:1px solid var(--ac-line);
  border-radius:var(--ac-radius-lg);
  box-shadow:var(--ac-shadow);
  padding:56px;
}
.ac-connect-card h2{
  font-size:28px;
  font-weight:800;
  line-height:1.3;
  margin-bottom:14px;
}
.ac-connect-note{
  font-size:15px;
  line-height:1.8;
  color:var(--ac-note);
  margin-bottom:0;
}
.ac-connect-form{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:18px;
}
.ac-connect-form .ac-form-field-full{grid-column:1/-1}
.ac-connect-form .ac-connect-submit{grid-column:1/-1;width:100%}
.ac-form-field label{
  display:block;
  font-size:14px;
  font-weight:600;
  color:var(--ac-ink);
  margin-bottom:8px;
}
.ac-form-field input{
  height:46px;
  width:100%;
  border:1px solid var(--ac-line);
  border-radius:8px;
  background:var(--ac-paper);
  padding:0 14px;
  font-size:15px;
  color:var(--ac-ink);
  transition:border-color .25s ease,box-shadow .25s ease;
  outline:none;
}
.ac-form-field input:focus{
  border-color:var(--ac-bronze);
  box-shadow:0 2px 0 var(--ac-bronze);
}
.ac-form-field input::placeholder{color:var(--ac-weak)}
.ac-footer{
  background:var(--ac-ink);
  color:var(--ac-paper);
  padding:64px 0 24px;
}
.ac-footer-grid{
  display:grid;
  grid-template-columns:2fr 1fr 1fr 1fr;
  gap:40px;
  padding-bottom:40px;
  border-bottom:1px solid rgba(255,255,255,.14);
}
.ac-footer-logo{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:20px;
  font-weight:900;
  color:var(--ac-paper);
  margin-bottom:12px;
}
.ac-footer-desc{
  font-size:14px;
  line-height:1.75;
  color:rgba(255,255,255,.55);
  max-width:320px;
}
.ac-footer-col-title{
  font-size:14px;
  font-weight:700;
  color:var(--ac-paper);
  margin-bottom:14px;
}
.ac-footer-col a{
  display:block;
  font-size:14px;
  color:rgba(255,255,255,.55);
  padding:5px 0;
  transition:color .25s ease;
}
.ac-footer-col a:hover{color:var(--ac-bronze)}
.ac-footer-bottom{
  display:flex;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  padding-top:24px;
  font-size:13px;
  color:rgba(255,255,255,.4);
}
.ac-footer-bottom a{color:rgba(255,255,255,.5)}
.ac-footer-bottom a:hover{color:var(--ac-bronze)}
@media (max-width:1023px){
  .ac-nav{display:none}
  .ac-search,.ac-login-link,.ac-header-cta{display:none}
  .ac-burger{display:inline-flex}
  .ac-header-inner{gap:16px}
  .ac-cat-hero{padding:64px 0}
  .ac-cat-hero h1{font-size:34px}
  .ac-hero-visual-wrap{min-height:auto;margin-top:28px}
  .ac-editorial{padding:64px 0}
  .ac-process-steps{grid-template-columns:repeat(2,1fr)}
  .ac-process-step::before{display:none}
  .ac-directions-item{grid-template-columns:56px 1fr;gap:12px}
  .ac-directions-item p{grid-column:1/-1;padding-left:0}
}
@media (max-width:767px){
  :root{--ac-space:64px}
  .ac-container{padding-left:20px;padding-right:20px}
  .ac-cat-hero{padding:48px 0}
  .ac-cat-hero h1{font-size:30px}
  .ac-cat-lead{font-size:15px}
  .ac-header{height:60px}
  .ac-header-inner{min-height:60px}
  .ac-editorial h2,.ac-process-head h2,.ac-connect-card h2{font-size:24px}
  .ac-connect-card{padding:32px 24px}
  .ac-footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:559px){
  .ac-process-steps{grid-template-columns:1fr}
  .ac-connect-form{grid-template-columns:1fr}
  .ac-cat-hero-actions .ac-btn{width:100%}
  .ac-hero-svg{width:220px;height:220px}
  .ac-footer-grid{grid-template-columns:1fr}
  .ac-footer-bottom{flex-direction:column}
  .ac-directions-item{grid-template-columns:1fr;gap:8px}
  .ac-directions-index{font-size:22px}
}

/* roulang page: category3 */
/* ==========================================================================
           亚洲城官网 · 数字服务分类页
           设计变量 / Reset / 容器 / 导航 / 板块 / 列表 / 数据 / 场景 / FAQ / CTA / 页脚
           ========================================================================== */

        :root {
            --ac-ink: #191D1C;
            --ac-paper: #F4F0E8;
            --ac-white: #FFFFFF;
            --ac-copper: #A87C4A;
            --ac-pine: #2F5044;
            --ac-secondary: #635E57;
            --ac-muted: #A39D92;
            --ac-line: #E4DED2;
            --ac-dark-line: rgba(255, 255, 255, 0.14);
            --ac-radius-sm: 8px;
            --ac-radius: 14px;
            --ac-radius-lg: 20px;
            --ac-shadow: 0 2px 8px rgba(25, 29, 28, 0.04), 0 8px 24px rgba(25, 29, 28, 0.06);
            --ac-shadow-hover: 0 12px 32px rgba(25, 29, 28, 0.12);
            --ac-transition: 0.25s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
            background: var(--ac-paper);
            color: var(--ac-ink);
            font-size: 16px;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            text-rendering: optimizeLegibility;
        }

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

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

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

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            color: var(--ac-ink);
            line-height: 1.3;
            margin: 0;
        }

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

        /* ---- Container ---- */
        .ac-container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* ---- Section 间距 ---- */
        .ac-section {
            padding: 96px 0;
        }

        /* ---- Section Head ---- */
        .ac-section-head {
            margin-bottom: 56px;
            max-width: 720px;
        }

        .ac-section-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 700;
            letter-spacing: 0.1em;
            color: var(--ac-copper);
            text-transform: uppercase;
            margin-bottom: 16px;
        }

        .ac-section-head h2,
        .ac-scenario-content h2,
        .ac-faq h2 {
            font-size: 32px;
            font-weight: 800;
            letter-spacing: 0.02em;
            margin-bottom: 16px;
        }

        .ac-section-desc {
            font-size: 16px;
            color: var(--ac-secondary);
            line-height: 1.75;
        }

        /* ---- Buttons ---- */
        .ac-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 46px;
            padding: 0 28px;
            border-radius: 8px;
            font-size: 15px;
            font-weight: 600;
            line-height: 1;
            border: 1px solid transparent;
            transition: all 0.25s ease;
            text-decoration: none;
            white-space: nowrap;
            cursor: pointer;
        }

        .ac-btn:focus-visible,
        .ac-hamburger:focus-visible,
        .ac-service-arrow:focus-visible,
        .ac-faq-item summary:focus-visible {
            outline: 2px solid var(--ac-copper);
            outline-offset: 2px;
        }

        .ac-btn-dark {
            background: var(--ac-ink);
            color: var(--ac-paper);
            border-color: var(--ac-ink);
        }

        .ac-btn-dark:hover {
            background: #000;
            color: #fff;
        }

        .ac-btn-dark:active {
            transform: translateY(1px);
        }

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

        .ac-btn-gold:hover {
            background: #946B3D;
            border-color: #946B3D;
            color: #fff;
        }

        .ac-btn-gold:active {
            transform: translateY(1px);
        }

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

        .ac-btn-outline:hover {
            background: var(--ac-ink);
            color: var(--ac-paper);
        }

        .ac-btn-link {
            background: transparent;
            color: var(--ac-ink);
            border: none;
            padding: 0 4px;
            height: auto;
        }

        .ac-btn-link:hover {
            text-decoration: underline;
            text-decoration-color: var(--ac-copper);
            text-underline-offset: 4px;
            text-decoration-thickness: 2px;
        }

        .ac-btn-lg {
            height: 54px;
            padding: 0 36px;
            font-size: 16px;
        }

        .ac-btn-block {
            width: 100%;
        }

        /* ---- Header / Nav ---- */
        .ac-header {
            position: sticky;
            top: 0;
            z-index: 200;
            background: rgba(244, 240, 232, 0.96);
            border-bottom: 1px solid var(--ac-line);
            transition: box-shadow 0.25s ease;
        }

        .ac-header.is-scrolled {
            box-shadow: 0 4px 20px rgba(25, 29, 28, 0.06);
        }

        .ac-header-inner {
            display: flex;
            align-items: center;
            height: 72px;
            gap: 32px;
        }

        .ac-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            text-decoration: none;
        }

        .ac-logo-icon {
            flex-shrink: 0;
        }

        .ac-logo-text {
            font-size: 22px;
            font-weight: 900;
            color: var(--ac-ink);
            letter-spacing: 0.01em;
            line-height: 1;
        }

        .ac-logo-sub {
            font-weight: 400;
            color: var(--ac-secondary);
            font-size: 18px;
            margin-left: 6px;
        }

        .ac-nav {
            display: flex;
            align-items: center;
            gap: 6px;
            flex: 1;
        }

        .ac-nav-link {
            position: relative;
            display: inline-block;
            padding: 10px 16px;
            font-size: 15px;
            font-weight: 600;
            color: var(--ac-secondary);
            text-decoration: none;
            transition: color 0.25s ease;
            white-space: nowrap;
        }

        .ac-nav-link::after {
            content: "";
            position: absolute;
            left: 16px;
            right: 16px;
            bottom: 2px;
            height: 2px;
            background: var(--ac-copper);
            transform: scaleX(0);
            transform-origin: center;
            transition: transform 0.25s ease;
        }

        .ac-nav-link:hover {
            color: var(--ac-ink);
        }

        .ac-nav-link:hover::after {
            transform: scaleX(1);
        }

        .ac-nav-link.is-active {
            color: var(--ac-ink);
            font-weight: 700;
        }

        .ac-nav-link.is-active::after {
            transform: scaleX(1);
        }

        .ac-header-actions {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-shrink: 0;
        }

        .ac-search-box {
            display: flex;
            align-items: center;
            gap: 8px;
            background: var(--ac-white);
            border: 1px solid var(--ac-line);
            border-radius: 8px;
            padding: 0 12px;
            height: 40px;
            width: 160px;
            transition: width 0.3s ease, border-color 0.25s ease, box-shadow 0.25s ease;
        }

        .ac-search-box:focus-within {
            width: 220px;
            border-color: var(--ac-copper);
            box-shadow: 0 0 0 3px rgba(168, 124, 74, 0.12);
        }

        .ac-search-icon {
            color: var(--ac-muted);
            flex-shrink: 0;
        }

        .ac-search-input {
            border: none;
            background: transparent;
            outline: none;
            font-size: 14px;
            width: 100%;
            color: var(--ac-ink);
        }

        .ac-search-input::placeholder {
            color: var(--ac-muted);
        }

        .ac-hamburger {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 44px;
            height: 44px;
            background: transparent;
            border: none;
            border-radius: 8px;
            padding: 0 10px;
        }

        .ac-hamburger span {
            display: block;
            height: 2px;
            width: 22px;
            background: var(--ac-ink);
            border-radius: 2px;
        }

        .ac-hamburger:hover {
            background: rgba(168, 124, 74, 0.08);
        }

        /* ---- Off-canvas ---- */
        .ac-offcanvas {
            background: var(--ac-ink);
            color: var(--ac-paper);
            width: 280px;
            padding: 32px 28px;
            display: flex;
            flex-direction: column;
            overflow-y: auto;
        }

        .ac-offcanvas-close {
            color: var(--ac-muted);
            font-size: 28px;
            line-height: 1;
            margin-bottom: 24px;
            align-self: flex-end;
        }

        .ac-offcanvas-close:hover {
            color: var(--ac-copper);
        }

        .ac-mobile-nav {
            display: flex;
            flex-direction: column;
            gap: 4px;
            margin-bottom: 32px;
        }

        .ac-mobile-nav a {
            display: block;
            padding: 14px 12px;
            color: rgba(244, 240, 232, 0.8);
            font-size: 17px;
            font-weight: 600;
            border-radius: 8px;
            transition: background 0.25s ease, color 0.25s ease;
        }

        .ac-mobile-nav a:hover {
            background: rgba(255, 255, 255, 0.06);
            color: #fff;
        }

        .ac-mobile-nav a.is-active {
            color: var(--ac-copper);
            background: rgba(168, 124, 74, 0.12);
        }

        .ac-mobile-bottom {
            display: flex;
            flex-direction: column;
            gap: 12px;
            margin-top: auto;
        }

        /* ---- Breadcrumb ---- */
        .ac-breadcrumb {
            font-size: 13px;
            color: var(--ac-muted);
            margin-bottom: 28px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .ac-breadcrumb a {
            color: var(--ac-secondary);
        }

        .ac-breadcrumb a:hover {
            color: var(--ac-copper);
        }

        .ac-breadcrumb-current {
            color: var(--ac-ink);
            font-weight: 600;
        }

        /* ---- Page Hero（索引区） ---- */
        .ac-page-hero {
            padding: 72px 0 88px;
            background: var(--ac-paper);
            border-bottom: 1px solid var(--ac-line);
        }

        .ac-page-hero-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 700;
            letter-spacing: 0.08em;
            color: var(--ac-copper);
            background: rgba(168, 124, 74, 0.1);
            border: 1px solid rgba(168, 124, 74, 0.25);
            padding: 6px 14px;
            border-radius: 999px;
            margin-bottom: 20px;
        }

        .ac-page-hero h1 {
            font-size: 44px;
            font-weight: 900;
            line-height: 1.15;
            letter-spacing: 0.01em;
            margin-bottom: 20px;
        }

        .ac-page-hero-desc {
            font-size: 17px;
            line-height: 1.8;
            color: var(--ac-secondary);
            max-width: 540px;
            margin-bottom: 32px;
        }

        .ac-page-hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        .ac-page-hero-media {
            position: relative;
        }

        .ac-page-hero-media img {
            width: 100%;
            border-radius: 20px;
            aspect-ratio: 4 / 3;
            object-fit: cover;
            box-shadow: var(--ac-shadow);
        }

        .ac-page-hero-media::after {
            content: "数字服务 · 城市入口";
            position: absolute;
            right: -12px;
            bottom: -12px;
            background: var(--ac-copper);
            color: #fff;
            font-size: 12px;
            letter-spacing: 0.06em;
            padding: 8px 16px;
            border-radius: 8px;
            box-shadow: 0 8px 24px rgba(25, 29, 28, 0.18);
        }

        /* ---- 服务分组列表 ---- */
        .ac-group-title {
            font-size: 20px;
            font-weight: 800;
            margin-bottom: 24px;
            padding-bottom: 14px;
            border-bottom: 2px solid var(--ac-ink);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .ac-service-list {
            display: flex;
            flex-direction: column;
        }

        .ac-service-item {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            padding: 24px 20px;
            border-bottom: 1px solid var(--ac-line);
            background: transparent;
            transition: background 0.25s ease, padding-left 0.25s ease, box-shadow 0.25s ease;
            border-radius: 0;
        }

        .ac-service-item:first-child {
            border-top: 1px solid var(--ac-line);
        }

        .ac-service-item:hover {
            background: var(--ac-white);
            padding-left: 28px;
            box-shadow: var(--ac-shadow);
            border-radius: 12px;
        }

        .ac-service-info h4 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 4px;
        }

        .ac-service-info p {
            font-size: 14px;
            color: var(--ac-secondary);
            line-height: 1.6;
            max-width: 420px;
        }

        .ac-service-arrow {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            border: 1px solid var(--ac-line);
            color: var(--ac-secondary);
            background: var(--ac-white);
            flex-shrink: 0;
            transition: all 0.25s ease;
        }

        .ac-service-item:hover .ac-service-arrow {
            background: var(--ac-copper);
            border-color: var(--ac-copper);
            color: #fff;
            transform: translateX(4px);
        }

        /* ---- 数据带 ---- */
        .ac-data-strip {
            background: var(--ac-paper);
            border-top: 1px solid var(--ac-line);
            border-bottom: 1px solid var(--ac-line);
            padding: 56px 0;
        }

        .ac-data-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
        }

        .ac-data-item {
            text-align: center;
            padding: 16px 24px;
            position: relative;
        }

        .ac-data-item:not(:last-child)::after {
            content: "";
            position: absolute;
            right: 0;
            top: 50%;
            transform: translateY(-50%);
            height: 56px;
            width: 1px;
            background: var(--ac-line);
        }

        .ac-data-item::before {
            content: "";
            display: block;
            width: 32px;
            height: 2px;
            background: var(--ac-copper);
            margin: 0 auto 12px;
            opacity: 0.5;
        }

        .ac-data-label {
            display: block;
            font-size: 13px;
            font-weight: 600;
            color: var(--ac-secondary);
            margin-bottom: 8px;
            letter-spacing: 0.06em;
        }

        .ac-data-num {
            display: block;
            font-size: 64px;
            font-weight: 900;
            color: var(--ac-copper);
            font-variant-numeric: tabular-nums;
            line-height: 1.1;
            margin-bottom: 10px;
        }

        .ac-data-note {
            font-size: 13px;
            color: var(--ac-muted);
            line-height: 1.5;
        }

        /* ---- 场景区 ---- */
        .ac-scenario {
            background: var(--ac-white);
            border-bottom: 1px solid var(--ac-line);
        }

        .ac-scenario-media img {
            border-radius: 20px;
            aspect-ratio: 4 / 3;
            object-fit: cover;
            box-shadow: var(--ac-shadow);
        }

        .ac-scenario-content {
            padding-left: 40px;
        }

        .ac-scenario-content p {
            margin-bottom: 24px;
            color: var(--ac-secondary);
            font-size: 16px;
            line-height: 1.8;
        }

        .ac-scenario-list {
            list-style: none;
            margin: 0 0 32px;
        }

        .ac-scenario-list li {
            position: relative;
            padding: 14px 0 14px 28px;
            border-bottom: 1px solid var(--ac-line);
            font-size: 15px;
            color: var(--ac-ink);
            line-height: 1.6;
        }

        .ac-scenario-list li:first-child {
            border-top: 1px solid var(--ac-line);
        }

        .ac-scenario-list li::before {
            content: "";
            position: absolute;
            left: 4px;
            top: 22px;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--ac-copper);
        }

        /* ---- FAQ ---- */
        .ac-faq {
            background: var(--ac-paper);
            border-bottom: 1px solid var(--ac-line);
        }

        .ac-faq .cell.large-4 {
            padding-right: 32px;
        }

        .ac-faq-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .ac-faq-item {
            background: var(--ac-white);
            border: 1px solid var(--ac-line);
            border-radius: 14px;
            overflow: hidden;
            transition: box-shadow 0.25s ease;
        }

        .ac-faq-item[open] {
            box-shadow: var(--ac-shadow);
        }

        .ac-faq-item summary {
            list-style: none;
            padding: 22px 24px;
            font-size: 16px;
            font-weight: 700;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            color: var(--ac-ink);
            transition: color 0.25s ease;
        }

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

        .ac-faq-item summary::after {
            content: "+";
            font-size: 26px;
            font-weight: 300;
            color: var(--ac-copper);
            line-height: 1;
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }

        .ac-faq-item[open] summary::after {
            transform: rotate(45deg);
        }

        .ac-faq-item summary:hover {
            color: var(--ac-copper);
        }

        .ac-faq-item[open] summary {
            border-bottom: 1px solid var(--ac-line);
        }

        .ac-faq-content {
            padding: 18px 24px 24px;
            font-size: 14px;
            line-height: 1.75;
            color: var(--ac-secondary);
            background: var(--ac-white);
        }

        /* ---- CTA + 表单 ---- */
        .ac-cta-band {
            position: relative;
            padding: 100px 0;
            background: var(--ac-ink);
            overflow: hidden;
        }

        .ac-cta-bg {
            position: absolute;
            inset: 0;
            background-size: cover;
            background-position: center;
            opacity: 0.35;
        }

        .ac-cta-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(25, 29, 28, 0.95) 0%, rgba(25, 29, 28, 0.78) 48%, rgba(25, 29, 28, 0.55) 100%);
        }

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

        .ac-cta-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 700;
            letter-spacing: 0.1em;
            color: var(--ac-copper);
            margin-bottom: 16px;
        }

        .ac-cta-content h2 {
            font-size: 34px;
            font-weight: 800;
            color: var(--ac-paper);
            line-height: 1.3;
            margin-bottom: 16px;
            max-width: 520px;
        }

        .ac-cta-content p {
            font-size: 16px;
            color: rgba(244, 240, 232, 0.75);
            line-height: 1.75;
            margin-bottom: 32px;
            max-width: 480px;
        }

        .ac-contact-form {
            background: var(--ac-white);
            border-radius: 20px;
            padding: 36px 32px;
            box-shadow: 0 20px 48px rgba(0, 0, 0, 0.28);
        }

        .ac-contact-form h3 {
            font-size: 20px;
            font-weight: 800;
            margin-bottom: 4px;
        }

        .ac-contact-form .ac-form-sub {
            font-size: 13px;
            color: var(--ac-muted);
            margin-bottom: 24px;
        }

        .ac-contact-form label {
            display: block;
            font-size: 14px;
            font-weight: 600;
            color: var(--ac-ink);
            margin-bottom: 16px;
        }

        .ac-contact-form input {
            display: block;
            width: 100%;
            height: 46px;
            border: 1px solid var(--ac-line);
            border-radius: 8px;
            padding: 0 14px;
            margin-top: 6px;
            font-size: 14px;
            background: var(--ac-paper);
            transition: border-color 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
        }

        .ac-contact-form input:focus {
            outline: none;
            border-color: var(--ac-copper);
            box-shadow: 0 2px 0 var(--ac-copper);
            background: var(--ac-white);
        }

        .ac-contact-form input::placeholder {
            color: var(--ac-muted);
        }

        .ac-form-note {
            font-size: 12px;
            color: var(--ac-muted);
            margin-top: 14px;
            text-align: center;
            line-height: 1.6;
        }

        /* ---- Footer ---- */
        .ac-footer {
            background: var(--ac-ink);
            color: var(--ac-paper);
            padding: 72px 0 32px;
        }

        .ac-footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 48px;
            margin-bottom: 56px;
        }

        .ac-footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 900;
            color: var(--ac-paper);
            margin-bottom: 16px;
        }

        .ac-footer-desc {
            font-size: 14px;
            color: rgba(244, 240, 232, 0.6);
            line-height: 1.75;
            max-width: 320px;
        }

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

        .ac-footer-col-title {
            font-size: 14px;
            font-weight: 700;
            color: var(--ac-paper);
            margin-bottom: 6px;
        }

        .ac-footer-col a {
            font-size: 14px;
            color: rgba(244, 240, 232, 0.65);
            text-decoration: none;
            transition: color 0.25s ease;
        }

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

        .ac-footer-bottom {
            border-top: 1px solid var(--ac-dark-line);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: rgba(244, 240, 232, 0.45);
        }

        .ac-footer-bottom a {
            color: rgba(244, 240, 232, 0.65);
            text-decoration: underline;
        }

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

        /* ---- 入场过渡（有 JS 时生效） ---- */
        html.js .ac-section:not(.ac-revealed),
        html.js .ac-cta-band:not(.ac-revealed) {
            opacity: 0;
            transform: translateY(14px);
        }

        .ac-section,
        .ac-cta-band {
            transition: opacity 0.7s ease, transform 0.7s ease;
        }

        /* ---- 响应式 ---- */
        @media (max-width: 1024px) {
            .ac-nav,
            .ac-search-box,
            .ac-login-link,
            .ac-nav-cta {
                display: none;
            }

            .ac-hamburger {
                display: flex;
            }

            .ac-header-inner {
                height: 60px;
                justify-content: space-between;
            }

            .ac-logo-text {
                font-size: 18px;
            }

            .ac-logo-sub {
                font-size: 16px;
            }

            .ac-section {
                padding: 64px 0;
            }

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

            .ac-page-hero-media {
                margin-top: 48px;
            }

            .ac-page-hero-media::after {
                right: 4px;
                bottom: 4px;
            }

            .ac-scenario-content {
                padding-left: 0;
                margin-top: 40px;
            }

            .ac-faq .cell.large-4 {
                padding-right: 0;
                margin-bottom: 32px;
            }

            .ac-cta-band {
                padding: 64px 0;
            }

            .ac-contact-form {
                margin-top: 40px;
            }

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

        @media (max-width: 600px) {
            .ac-container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .ac-section {
                padding: 48px 0;
            }

            .ac-page-hero {
                padding: 32px 0 48px;
            }

            .ac-page-hero h1 {
                font-size: 32px;
            }

            .ac-page-hero-desc {
                font-size: 15px;
            }

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

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

            .ac-page-hero-media::after {
                display: none;
            }

            .ac-section-head h2,
            .ac-scenario-content h2,
            .ac-faq h2 {
                font-size: 26px;
            }

            .ac-group-title {
                font-size: 18px;
                margin-top: 24px;
            }

            .ac-group-title:first-child {
                margin-top: 0;
            }

            .ac-service-item {
                padding: 20px 8px;
            }

            .ac-service-info h4 {
                font-size: 17px;
            }

            .ac-service-info p {
                font-size: 13px;
            }

            .ac-service-arrow {
                width: 36px;
                height: 36px;
            }

            .ac-data-grid {
                grid-template-columns: repeat(3, 1fr);
            }

            .ac-data-item {
                padding: 12px 6px;
            }

            .ac-data-item:not(:last-child)::after {
                display: none;
            }

            .ac-data-num {
                font-size: 36px;
            }

            .ac-data-note {
                font-size: 11px;
                line-height: 1.4;
            }

            .ac-data-label {
                font-size: 12px;
            }

            .ac-scenario-list li {
                font-size: 14px;
            }

            .ac-faq-list {
                gap: 12px;
            }

            .ac-faq-item summary {
                padding: 18px 18px;
                font-size: 15px;
            }

            .ac-faq-content {
                padding: 16px 18px 18px;
                font-size: 14px;
            }

            .ac-cta-content h2 {
                font-size: 26px;
            }

            .ac-cta-content .ac-btn {
                width: 100%;
            }

            .ac-cta-band {
                padding: 48px 0;
            }

            .ac-contact-form {
                padding: 28px 20px;
            }

            .ac-footer {
                padding: 48px 0 24px;
            }

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

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