/* roulang page: index */
:root {
            --bg: #F5F3EC;
            --surface: #FFFFFF;
            --ink: #1F2421;
            --muted: #6C706A;
            --primary: #1D6A66;
            --primary-dark: #14504C;
            --accent: #B98C63;
            --line: #E1DDD2;
            --danger: #B8544C;
            --radius: 4px;
            --shadow: 0 1px 2px rgba(20, 25, 23, 0.04), 0 8px 24px rgba(20, 25, 23, 0.06);
            --shadow-hover: 0 2px 4px rgba(20, 25, 23, 0.06), 0 12px 28px rgba(20, 25, 23, 0.10);
            --space-lg: 96px;
            --space-md: 72px;
            --space-sm: 48px;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            background: var(--bg);
            color: var(--ink);
            font-family: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            font-size: 15px;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }
        body.nav-open {
            overflow: hidden;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color .25s ease, border-color .25s ease, background .25s ease, opacity .25s ease, transform .25s ease;
        }
        ul,
        ol {
            list-style: none;
        }
        button,
        input,
        textarea,
        select {
            font: inherit;
            color: inherit;
        }
        input,
        textarea {
            transition: border-color .25s ease, box-shadow .25s ease, background .25s ease;
        }
        input:focus-visible,
        textarea:focus-visible,
        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 28px;
        }
        .section {
            padding: var(--space-lg) 0;
        }
        .section-header {
            margin-bottom: 56px;
        }
        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-family: "Inter", "Helvetica Neue", Arial, sans-serif;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: .18em;
            text-transform: uppercase;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .eyebrow::before {
            content: "";
            width: 20px;
            height: 1px;
            background: var(--accent);
        }
        .section-title {
            font-size: clamp(24px, 3vw, 40px);
            line-height: 1.2;
            color: var(--ink);
            font-weight: 600;
            letter-spacing: -0.01em;
            max-width: 760px;
        }
        .section-intro {
            margin-top: 14px;
            color: var(--muted);
            max-width: 800px;
            font-size: 15px;
            line-height: 1.8;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 46px;
            padding: 0 28px;
            border-radius: var(--radius);
            font-size: 15px;
            font-weight: 600;
            line-height: 46px;
            border: 1px solid transparent;
            cursor: pointer;
            background: transparent;
            transition: background .25s ease, border-color .25s ease, color .25s ease, transform .2s ease, box-shadow .25s ease;
        }
        .btn:active {
            transform: translateY(1px);
        }
        .btn-primary {
            background: var(--ink);
            color: #fff;
            border-color: var(--ink);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
        }
        .btn-secondary {
            background: #fff;
            color: var(--ink);
            border-color: #c7c4ba;
        }
        .btn-secondary:hover {
            border-color: var(--ink);
            color: var(--ink);
            background: #fff;
        }
        .btn-large {
            height: 52px;
            line-height: 50px;
            padding: 0 34px;
            font-size: 16px;
        }
        .tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            height: 26px;
            padding: 0 10px;
            border: 1px solid var(--line);
            background: #fff;
            border-radius: 2px;
            font-size: 12px;
            letter-spacing: .04em;
            color: var(--muted);
        }
        .topbar {
            background: var(--ink);
            color: rgba(255, 255, 255, .78);
            height: 36px;
            display: flex;
            align-items: center;
            position: relative;
            z-index: 100;
        }
        .topbar .container {
            width: 100%;
        }
        .topbar-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .topbar-left {
            font-size: 12px;
            letter-spacing: .04em;
            font-family: "Inter", "Helvetica Neue", Arial, sans-serif;
        }
        .topbar-right {
            font-size: 12px;
        }
        .topbar-right a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: rgba(255, 255, 255, .85);
        }
        .topbar-right a:hover {
            color: #fff;
        }
        .site-header {
            background: var(--surface);
            border-bottom: 1px solid var(--line);
            position: sticky;
            top: 0;
            z-index: 90;
            height: 72px;
            transition: box-shadow .25s ease;
        }
        .site-header.scrolled {
            box-shadow: 0 1px 8px rgba(20, 25, 23, .06);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 24px;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .brand-logo-icon {
            width: 30px;
            height: 30px;
            color: var(--primary);
            flex-shrink: 0;
        }
        .brand-logo-name {
            font-size: 20px;
            font-weight: 600;
            letter-spacing: -0.01em;
            color: var(--ink);
            white-space: nowrap;
        }
        .brand-logo-name span {
            color: var(--primary-dark);
        }
        .main-nav {
            display: flex;
            align-items: center;
            justify-content: flex-end;
            gap: 4px;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-links a {
            display: flex;
            align-items: center;
            height: 72px;
            padding: 0 14px;
            font-size: 15px;
            color: var(--ink);
            border-bottom: 1px solid transparent;
            position: relative;
            transition: color .25s ease;
        }
        .nav-links a::after {
            content: "";
            position: absolute;
            left: 14px;
            right: 14px;
            bottom: 0;
            height: 1px;
            background: var(--primary);
            transform: scaleX(0);
            transform-origin: left;
            transition: transform .25s ease;
        }
        .nav-links a:hover {
            color: var(--primary);
        }
        .nav-links a:hover::after,
        .nav-links a.is-active::after {
            transform: scaleX(1);
        }
        .nav-links a.is-active {
            color: var(--primary-dark);
        }
        .nav-links a i {
            font-size: 14px;
            color: var(--muted);
            margin-right: 4px;
        }
        .nav-toggle {
            display: none;
            background: transparent;
            border: none;
            width: 44px;
            height: 44px;
            cursor: pointer;
            flex-direction: column;
            align-items: flex-end;
            justify-content: center;
            gap: 5px;
            padding: 0 4px;
        }
        .nav-toggle span {
            background: var(--ink);
            width: 24px;
            height: 2px;
            transition: transform .25s ease, opacity .25s ease;
        }
        body.nav-open .nav-toggle span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        body.nav-open .nav-toggle span:nth-child(2) {
            opacity: 0;
        }
        body.nav-open .nav-toggle span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }
        .hero {
            position: relative;
            padding: 0;
            min-height: 70vh;
            display: flex;
            align-items: center;
            background: var(--bg);
            overflow: hidden;
        }
        .hero-background {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            z-index: 0;
        }
        .hero-background::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(245, 243, 236, 0.96), rgba(245, 243, 236, 0.74), rgba(245, 243, 236, 0.48));
        }
        .hero-content {
            position: relative;
            z-index: 2;
            padding: 72px 0;
            max-width: 720px;
        }
        .hero-eyebrow {
            font-size: 13px;
            font-family: "Inter", "Helvetica Neue", Arial, sans-serif;
            letter-spacing: .18em;
            text-transform: uppercase;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 20px;
        }
        .hero-eyebrow::before {
            content: "";
            width: 28px;
            height: 1px;
            background: var(--accent);
        }
        .hero-title {
            font-size: clamp(34px, 5vw, 64px);
            line-height: 1.15;
            font-weight: 600;
            letter-spacing: -0.01em;
            margin-bottom: 22px;
        }
        .hero-desc {
            font-size: 16px;
            line-height: 1.85;
            color: var(--muted);
            margin-bottom: 34px;
            max-width: 620px;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            align-items: center;
        }
        .services-section {
            background: var(--bg);
        }
        .service-rows {
            border-top: 1px solid var(--line);
            margin-top: 8px;
        }
        .service-row {
            display: grid;
            grid-template-columns: 80px 1fr auto;
            align-items: center;
            gap: 24px;
            padding: 34px 12px;
            border-bottom: 1px solid var(--line);
            transition: background .25s ease, padding .25s ease;
        }
        .service-row:hover {
            background: var(--surface);
            box-shadow: var(--shadow);
            padding-left: 24px;
            padding-right: 24px;
        }
        .service-index {
            font-family: "Inter", "Helvetica Neue", Arial, sans-serif;
            font-size: 28px;
            font-weight: 500;
            color: var(--accent);
            line-height: 1;
        }
        .service-title {
            font-size: 22px;
            font-weight: 600;
            margin-bottom: 6px;
        }
        .service-desc {
            font-size: 15px;
            color: var(--muted);
            max-width: 720px;
        }
        .service-link {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border: 1px solid var(--line);
            border-radius: 50%;
            color: var(--ink);
            transition: background .25s ease, border-color .25s ease, color .25s ease, transform .25s ease;
        }
        .service-link i {
            font-size: 16px;
        }
        .service-row:hover .service-link {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
            transform: translateX(4px);
        }
        .stats-section {
            background: var(--ink);
            color: #fff;
            padding: 44px 0;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
        }
        .stat-item {
            padding: 12px 24px;
            border-left: 1px solid rgba(255, 255, 255, 0.16);
            text-align: left;
        }
        .stat-item:first-child {
            border-left: none;
            padding-left: 0;
        }
        .stat-number {
            font-family: "Inter", "Helvetica Neue", Arial, sans-serif;
            font-size: 42px;
            line-height: 1.1;
            font-weight: 500;
            margin-bottom: 6px;
            color: #fff;
        }
        .stat-label {
            font-size: 13px;
            color: rgba(255, 255, 255, .62);
        }
        .feature-section {
            background: var(--surface);
        }
        .feature-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .feature-block {
            display: grid;
            grid-template-columns: 1fr;
            gap: 32px;
        }
        .feature-tile {
            display: grid;
            grid-template-columns: 1.05fr 0.95fr;
            gap: 26px;
            align-items: center;
            background: var(--bg);
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--line);
            transition: box-shadow .3s ease, transform .3s ease;
        }
        .feature-tile:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .feature-tile.reverse .feature-image-wrap {
            order: 2;
        }
        .feature-image-wrap {
            position: relative;
            overflow: hidden;
            height: 100%;
            min-height: 180px;
        }
        .feature-image-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .6s ease;
        }
        .feature-tile:hover .feature-image-wrap img {
            transform: scale(1.02);
        }
        .feature-content {
            padding: 30px 10px 30px 0;
        }
        .feature-tile.reverse .feature-content {
            padding: 30px 0 30px 10px;
        }
        .feature-kicker {
            font-size: 12px;
            letter-spacing: .12em;
            color: var(--primary);
            margin-bottom: 10px;
            text-transform: uppercase;
            font-family: "Inter", "Helvetica Neue", Arial, sans-serif;
        }
        .feature-title {
            font-size: 21px;
            line-height: 1.35;
            font-weight: 600;
            margin-bottom: 12px;
        }
        .feature-desc {
            color: var(--muted);
            margin-bottom: 18px;
            font-size: 14px;
        }
        .feature-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 600;
            color: var(--ink);
            border-bottom: 1px solid var(--line);
            padding-bottom: 4px;
        }
        .feature-link:hover {
            color: var(--primary);
            border-color: var(--primary);
        }
        .solution-section {
            background: var(--bg);
        }
        .solution-layout {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 60px;
            align-items: start;
        }
        .solution-copy h3 {
            font-size: 28px;
            font-weight: 600;
            margin-bottom: 18px;
        }
        .solution-copy>p {
            color: var(--muted);
            margin-bottom: 28px;
        }
        .solution-principles {
            display: grid;
            grid-template-columns: 1fr;
            gap: 0;
            margin-top: 12px;
        }
        .solution-principle {
            border-top: 1px solid var(--line);
            padding: 18px 0;
            display: flex;
            gap: 16px;
        }
        .solution-principle:last-child {
            border-bottom: 1px solid var(--line);
        }
        .principle-index {
            font-family: "Inter", "Helvetica Neue", Arial, sans-serif;
            color: var(--accent);
            font-size: 14px;
            padding-top: 4px;
        }
        .principle-title {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 4px;
        }
        .principle-text {
            color: var(--muted);
            font-size: 14px;
        }
        .solution-aside {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            overflow: hidden;
        }
        .solution-aside img {
            width: 100%;
            height: 220px;
            object-fit: cover;
        }
        .aside-content {
            padding: 28px 30px 30px;
        }
        .aside-title {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .aside-lines {
            display: grid;
            gap: 6px;
        }
        .aside-lines li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            padding: 10px 0;
            border-bottom: 1px solid var(--line);
            font-size: 14px;
            color: var(--muted);
        }
        .aside-lines li:last-child {
            border-bottom: 0;
        }
        .aside-lines i {
            color: var(--primary);
            margin-top: 4px;
            font-size: 14px;
        }
        .news-section {
            background: var(--surface);
        }
        .news-head-row {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 30px;
            margin-bottom: 36px;
        }
        .news-list {
            border-top: 1px solid var(--ink);
        }
        .news-row {
            display: grid;
            grid-template-columns: 160px 1fr 60px;
            gap: 24px;
            padding: 26px 6px;
            border-bottom: 1px solid var(--line);
            align-items: center;
            transition: background .25s ease, padding .25s ease;
        }
        .news-row:hover {
            background: var(--bg);
            padding-left: 14px;
            padding-right: 14px;
        }
        .news-meta {
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            gap: 6px;
        }
        .news-time {
            font-family: "Inter", "Helvetica Neue", Arial, sans-serif;
            font-size: 14px;
            color: var(--muted);
            line-height: 1.4;
        }
        .news-cat {
            display: inline-flex;
            padding: 2px 8px;
            border: 1px solid var(--line);
            background: var(--bg);
            color: var(--primary);
            font-size: 12px;
            letter-spacing: .04em;
            border-radius: 2px;
        }
        .news-text {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .news-name {
            font-size: 18px;
            font-weight: 600;
            color: var(--ink);
            line-height: 1.4;
            transition: color .2s ease;
        }
        .news-row:hover .news-name {
            color: var(--primary-dark);
        }
        .news-desc {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-arrow {
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--muted);
            transition: color .25s ease, transform .25s ease;
        }
        .news-row:hover .news-arrow {
            color: var(--primary);
            transform: translateX(4px);
        }
        .all-news-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            border-bottom: 1px solid var(--ink);
            padding: 4px 0;
            font-weight: 600;
            font-size: 15px;
            white-space: nowrap;
        }
        .all-news-link:hover {
            color: var(--primary);
            border-color: var(--primary);
        }
        .empty-note {
            padding: 48px;
            text-align: center;
            color: var(--muted);
            border: 1px dashed var(--line);
            border-radius: var(--radius);
            margin-top: 0;
        }
        .faq-section {
            background: var(--bg);
        }
        .faq-list {
            max-width: 900px;
        }
        .faq-item {
            border-bottom: 1px solid var(--line);
        }
        .faq-item:first-child {
            border-top: 1px solid var(--line);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            padding: 24px 4px;
            cursor: pointer;
            font-size: 18px;
            font-weight: 600;
            background: transparent;
            border: none;
            text-align: left;
            width: 100%;
            transition: color .25s ease;
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question span:last-child {
            font-size: 20px;
            line-height: 1;
            color: var(--accent);
            transition: transform .3s ease;
            font-weight: 300;
            flex-shrink: 0;
        }
        .faq-answer {
            display: none;
            padding: 0 24px 24px 4px;
            max-width: 820px;
            color: var(--muted);
            font-size: 15px;
            line-height: 1.8;
        }
        details[open] .faq-question span:last-child {
            transform: rotate(45deg);
        }
        details[open] .faq-answer {
            display: block;
        }
        .cta-section {
            background: var(--ink);
            color: #fff;
        }
        .cta-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }
        .cta-title {
            font-size: 32px;
            font-weight: 600;
            color: #fff;
            line-height: 1.25;
            margin-bottom: 18px;
        }
        .cta-text {
            color: rgba(255, 255, 255, .72);
            margin-bottom: 26px;
            line-height: 1.8;
        }
        .cta-domain {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-family: "Inter", "Helvetica Neue", Arial, sans-serif;
            color: rgba(255, 255, 255, .85);
            font-size: 14px;
            padding: 10px 14px;
            border: 1px solid rgba(255, 255, 255, .20);
            background: rgba(255, 255, 255, .06);
            border-radius: var(--radius);
        }
        .cta-domain i {
            color: var(--accent);
        }
        .contact-form {
            background: var(--surface);
            color: var(--ink);
            border-radius: var(--radius);
            padding: 34px;
            box-shadow: var(--shadow);
        }
        .form-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }
        .form-field {
            display: flex;
            flex-direction: column;
            gap: 6px;
            min-width: 0;
        }
        .form-field.full {
            grid-column: 1 / -1;
        }
        .form-field label {
            font-size: 12px;
            letter-spacing: .08em;
            color: var(--muted);
            font-weight: 600;
        }
        .form-field input,
        .form-field textarea {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: var(--radius);
            height: 44px;
            padding: 0 12px;
            font-size: 15px;
            width: 100%;
            color: var(--ink);
        }
        .form-field textarea {
            height: 100px;
            padding: 10px 12px;
            resize: vertical;
        }
        .form-field input::placeholder,
        .form-field textarea::placeholder {
            color: #aaa;
        }
        .form-field input:focus,
        .form-field textarea:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 2px rgba(29, 106, 102, .12);
        }
        .contact-form .btn {
            width: 100%;
            margin-top: 20px;
        }
        .site-footer {
            background: #191E1B;
            color: rgba(255, 255, 255, .72);
            border-top: 1px solid rgba(255, 255, 255, .08);
        }
        .footer-main {
            padding: 72px 0 56px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.9fr 1fr 1fr;
            gap: 44px;
        }
        .footer-brand {
            display: flex;
            flex-direction: column;
            gap: 18px;
        }
        .footer-site-name {
            font-size: 22px;
            font-weight: 600;
            color: #fff;
        }
        .footer-brand-text {
            font-size: 14px;
            line-height: 1.75;
            color: rgba(255, 255, 255, .58);
            max-width: 260px;
        }
        .footer-title {
            font-size: 14px;
            color: #fff;
            font-weight: 600;
            letter-spacing: .04em;
            margin-bottom: 22px;
        }
        .footer-links li {
            margin-bottom: 12px;
        }
        .footer-links a {
            font-size: 14px;
            color: rgba(255, 255, 255, .64);
            transition: color .25s ease, padding-left .25s ease;
        }
        .footer-links a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .footer-contact li {
            display: flex;
            gap: 10px;
            align-items: center;
            font-size: 14px;
            color: rgba(255, 255, 255, .64);
            margin-bottom: 16px;
        }
        .footer-contact i {
            width: 18px;
            color: var(--accent);
            text-align: center;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .10);
            padding: 20px 0;
            font-size: 13px;
            color: rgba(255, 255, 255, .42);
        }
        .footer-bottom .container {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 8px;
        }
        .footer-bottom span {
            font-family: "Inter", "Helvetica Neue", Arial, sans-serif;
        }

        @media (max-width: 1024px) {
            .feature-list {
                grid-template-columns: 1fr;
            }
            .solution-layout {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .section {
                padding: var(--space-md) 0;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
            }
            .stat-item {
                border-left: none;
                border-top: 1px solid rgba(255, 255, 255, .12);
                padding-left: 16px;
                padding-top: 24px;
                padding-bottom: 24px;
            }
            .stat-item:first-child {
                border-left: none;
                padding-left: 16px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .cta-layout {
                grid-template-columns: 1fr;
                gap: 40px;
            }
        }
        @media (max-width: 767px) {
            .topbar {
                height: 38px;
            }
            .topbar-left {
                font-size: 11px;
            }
            .topbar-right a {
                font-size: 11px;
            }
            .site-header {
                height: 64px;
                position: relative;
            }
            .header-inner {
                height: 64px;
            }
            .brand-logo-name {
                font-size: 18px;
            }
            .nav-toggle {
                display: flex;
            }
            .main-nav {
                position: fixed;
                top: 0;
                left: 0;
                right: 0;
                bottom: 0;
                background: #fff;
                z-index: 200;
                flex-direction: column;
                align-items: stretch;
                justify-content: flex-start;
                padding: 80px 28px 40px;
                transform: translateX(100%);
                transition: transform .35s ease;
                overflow-y: auto;
            }
            body.nav-open .main-nav {
                transform: translateX(0);
            }
            .nav-links {
                flex-direction: column;
                align-items: stretch;
                gap: 0;
            }
            .nav-links a {
                border-bottom: 1px solid var(--line);
                font-size: 22px;
                line-height: 48px;
                height: auto;
                padding: 8px 0;
            }
            .nav-links a::after {
                display: none;
            }
            body.nav-open .site-header .nav-toggle {
                position: fixed;
                top: 12px;
                right: 16px;
                z-index: 210;
                background: transparent;
            }
            .hero {
                min-height: 60vh;
            }
            .hero-content {
                padding: 56px 0;
            }
            .hero-desc {
                font-size: 15px;
            }
            .service-row {
                grid-template-columns: 52px 1fr;
                padding: 24px 6px;
                gap: 16px;
            }
            .service-index {
                font-size: 22px;
            }
            .service-link {
                display: none;
            }
            .section {
                padding: var(--space-sm) 0;
            }
            .section-header {
                margin-bottom: 36px;
            }
            .section-title {
                font-size: 26px;
            }
            .stats-section {
                padding: 24px 0 36px;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .stat-item {
                border-top: 1px solid rgba(255, 255, 255, .12);
                border-left: none!important;
                padding: 18px 0;
            }
            .stat-number {
                font-size: 32px;
            }
            .feature-tile,
            .feature-tile.reverse {
                grid-template-columns: 1fr;
            }
            .feature-tile .feature-image-wrap,
            .feature-tile.reverse .feature-image-wrap {
                order: -1;
                min-height: 150px;
                height: 160px;
            }
            .feature-content,
            .feature-tile.reverse .feature-content {
                padding: 0 22px 24px;
            }
            .news-head-row {
                flex-direction: column;
                align-items: flex-start;
                gap: 16px;
                margin-bottom: 24px;
            }
            .news-row {
                grid-template-columns: 1fr 30px;
                gap: 8px 14px;
                padding: 20px 2px;
            }
            .news-meta {
                grid-column: 1 / -1;
                order: 1;
            }
            .news-text {
                order: 2;
                grid-column: 1;
            }
            .news-arrow {
                order: 2;
                grid-column: 2;
            }
            .news-time {
                font-size: 12px;
            }
            .news-name {
                font-size: 16px;
            }
            .news-desc {
                font-size: 13px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .cta-title {
                font-size: 26px;
            }
            .contact-form {
                padding: 24px 20px;
            }
            .form-grid {
                grid-template-columns: 1fr;
            }
            .form-field.full {
                grid-column: auto;
            }
            .btn {
                min-height: 46px;
                line-height: 44px;
            }
            .btn-large {
                height: 48px;
                line-height: 46px;
                font-size: 15px;
            }
        }
        @media (min-width: 768px) and (max-width: 1024px) {
            .feature-tile,
            .feature-tile.reverse {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation: none !important;
                transition: none !important;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #1D6A66;
            --primary-dark: #14504C;
            --ink: #1F2421;
            --muted: #6C706A;
            --bg: #F5F3EC;
            --surface: #ffffff;
            --line: #E1DDD2;
            --accent: #B98C63;
            --error: #B8544C;
            --font-cn: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            --font-num: "Inter", "Helvetica Neue", Arial, sans-serif;
            --radius-sm: 2px;
            --radius: 4px;
            --shadow: 0 1px 2px rgba(20, 25, 23, 0.04), 0 8px 24px rgba(20, 25, 23, 0.06);
            --shadow-hover: 0 2px 4px rgba(20, 25, 23, 0.05), 0 14px 32px rgba(20, 25, 23, 0.1);
            --space: 96px;
            --max-width: 1200px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            margin: 0;
            background-color: var(--bg);
            color: var(--ink);
            font-family: var(--font-cn);
            font-size: 15px;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        ul,
        ol {
            margin: 0;
            padding: 0;
            list-style: none;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color .2s ease;
        }
        p {
            margin: 0 0 1em;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            color: inherit;
        }
        .container,
        .grid-container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* ========== Top Info Bar ========== */
        .top-info-bar {
            background: #1F2421;
            color: rgba(255, 255, 255, .78);
            font-size: 12px;
            min-height: 36px;
            display: flex;
            align-items: center;
            letter-spacing: .02em;
        }
        .top-info-bar .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
        }
        .top-info-bar .info-domain {
            color: rgba(255, 255, 255, .88);
        }
        .top-info-bar .info-action {
            color: #ffffff;
            padding: 4px 14px;
            border: 1px solid rgba(255, 255, 255, .4);
            border-radius: 2px;
            transition: all .2s;
            background: transparent;
            font-size: 12px;
            line-height: 1.6;
        }
        .top-info-bar .info-action:hover {
            border-color: #ffffff;
            color: #ffffff;
            background: rgba(255, 255, 255, .08);
        }

        /* ========== Header ========== */
        .site-header {
            background: var(--surface);
            border-bottom: 1px solid var(--line);
            position: sticky;
            top: 0;
            z-index: 90;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 72px;
            gap: 20px;
        }
        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            color: var(--ink);
            text-decoration: none;
        }
        .brand-logo-icon {
            color: var(--primary);
            flex: none;
        }
        .brand-logo-name {
            font-size: 21px;
            font-weight: 600;
            letter-spacing: .01em;
            line-height: 1.25;
            white-space: nowrap;
        }
        .brand-logo:hover .brand-logo-name {
            color: var(--primary-dark);
        }
        .main-nav {
            display: flex;
            align-items: center;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-links a {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 10px 14px;
            font-size: 14px;
            color: var(--ink);
            border-bottom: 2px solid transparent;
            margin-bottom: -1px;
            transition: color .2s, border-color .2s;
        }
        .nav-links a i {
            font-size: 13px;
            color: var(--muted);
            transition: color .2s;
        }
        .nav-links a:hover {
            color: var(--primary);
        }
        .nav-links a:hover i {
            color: var(--primary);
        }
        .nav-links a.is-active {
            color: var(--primary-dark);
            border-bottom-color: var(--primary);
            font-weight: 600;
        }
        .nav-links a.is-active i {
            color: var(--primary);
        }
        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border: 1px solid var(--line);
            background: transparent;
            border-radius: 4px;
            cursor: pointer;
            padding: 10px;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            align-items: center;
        }
        .nav-toggle span {
            display: block;
            height: 2px;
            width: 20px;
            background: var(--ink);
            transition: transform .2s, opacity .2s;
        }
        .nav-toggle.is-open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .nav-toggle.is-open span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.is-open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* ========== Breadcrumb ========== */
        .category-breadcrumb {
            background: #ECE9E0;
            border-bottom: 1px solid var(--line);
            padding: 14px 0;
        }
        .category-breadcrumb .breadcrumb-list {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            font-size: 12px;
            color: var(--muted);
            align-items: center;
        }
        .category-breadcrumb .breadcrumb-list a:hover {
            color: var(--primary);
        }
        .category-breadcrumb .breadcrumb-list .sep {
            color: #B5B1A6;
        }
        .category-breadcrumb .breadcrumb-current {
            color: var(--ink);
            font-weight: 500;
        }

        /* ========== Page Hero ========== */
        .category-hero {
            position: relative;
            padding: 72px 0;
            background-color: #E9E4D8;
            background-image: linear-gradient(90deg, rgba(245, 243, 236, .92), rgba(245, 243, 236, .55)), url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            border-bottom: 1px solid var(--line);
            overflow: hidden;
        }
        .category-hero .hero-eyebrow {
            display: inline-block;
            font-family: var(--font-num);
            font-size: 12px;
            letter-spacing: .18em;
            color: var(--primary-dark);
            background: rgba(255, 255, 255, .68);
            border: 1px solid var(--line);
            padding: 4px 12px;
            border-radius: 20px;
            margin-bottom: 24px;
            font-weight: 600;
        }
        .category-hero h1 {
            font-size: clamp(32px, 4.8vw, 58px);
            line-height: 1.15;
            font-weight: 600;
            margin: 0 0 18px;
            letter-spacing: -0.01em;
            max-width: 680px;
        }
        .category-hero .hero-lead {
            font-size: 17px;
            line-height: 1.9;
            color: #565B55;
            max-width: 650px;
            margin-bottom: 32px;
        }
        .category-hero .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            min-height: 46px;
            padding: 0 24px;
            font-size: 15px;
            border-radius: 4px;
            border: 1px solid transparent;
            cursor: pointer;
            transition: all .2s ease;
            text-align: center;
        }
        .btn-dark {
            background: var(--ink);
            color: #ffffff;
        }
        .btn-dark:hover {
            background: var(--primary);
            color: #ffffff;
            transform: translateY(-1px);
        }
        .btn-outline {
            background: transparent;
            border-color: #9B9790;
            color: var(--ink);
        }
        .btn-outline:hover {
            border-color: var(--ink);
            background: var(--surface);
            transform: translateY(-1px);
        }
        .btn:active {
            transform: translateY(1px);
        }

        /* ========== Section Common ========== */
        .section-pad {
            padding: 96px 0;
        }
        .section-label {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 10px;
            font-family: var(--font-num);
            font-size: 12px;
            letter-spacing: .18em;
            text-transform: uppercase;
            color: var(--primary);
            font-weight: 600;
        }
        .section-label::before {
            content: "";
            width: 26px;
            height: 1px;
            background: var(--accent);
            display: block;
        }
        .section-title {
            font-size: clamp(26px, 3vw, 40px);
            font-weight: 600;
            line-height: 1.25;
            letter-spacing: -0.01em;
            margin: 0 0 16px;
            color: var(--ink);
        }
        .section-sub {
            color: var(--muted);
            font-size: 15px;
            max-width: 640px;
            line-height: 1.8;
        }

        /* ========== Feature List ========== */
        .cat-features {
            background: var(--surface);
            border-bottom: 1px solid var(--line);
        }
        .feature-list {
            margin-top: 36px;
        }
        .feature-row {
            display: flex;
            align-items: flex-start;
            gap: 22px;
            padding: 26px 10px;
            border-top: 1px solid var(--line);
            transition: background .25s ease;
            border-radius: 0;
        }
        .feature-row:last-child {
            border-bottom: 1px solid var(--line);
        }
        .feature-row:hover {
            background: #FBFAF6;
        }
        .feature-index {
            font-family: var(--font-num);
            font-size: 14px;
            font-weight: 600;
            color: var(--accent);
            min-width: 48px;
            letter-spacing: .05em;
            padding-top: 4px;
        }
        .feature-content {
            flex: 1;
        }
        .feature-content h3 {
            font-size: 20px;
            font-weight: 600;
            margin: 0 0 8px;
            line-height: 1.4;
        }
        .feature-content p {
            color: var(--muted);
            font-size: 15px;
            line-height: 1.8;
            margin-bottom: 0;
            max-width: 680px;
        }
        .feature-arrow {
            color: #B5B1A6;
            font-size: 18px;
            transition: transform .2s ease, color .2s ease;
            padding-top: 4px;
        }
        .feature-row:hover .feature-arrow {
            transform: translateX(4px);
            color: var(--primary);
        }

        /* ========== Editorial Highlight ========== */
        .cat-edit-hl {
            background: var(--bg);
            padding: 96px 0;
        }
        .edit-grid {
            display: grid;
            grid-template-columns: 1.2fr .8fr;
            gap: 40px;
            align-items: center;
            margin-top: 40px;
        }
        .edit-media {
            position: relative;
            overflow: hidden;
            border-radius: 4px;
            box-shadow: var(--shadow);
        }
        .edit-media img {
            width: 100%;
            object-fit: cover;
            aspect-ratio: 4/3;
        }
        .edit-media .media-tag {
            position: absolute;
            left: 16px;
            top: 16px;
            background: rgba(31, 36, 33, .86);
            color: #ffffff;
            font-size: 12px;
            padding: 4px 12px;
            border-radius: 2px;
            letter-spacing: .04em;
        }
        .edit-media .media-tag.accent {
            background: var(--primary);
        }
        .edit-copy .tick-list {
            margin-top: 18px;
        }
        .tick-list li {
            display: flex;
            gap: 10px;
            align-items: flex-start;
            padding: 8px 0;
            color: #555A54;
            font-size: 15px;
            border-bottom: 1px dashed #E6E0D4;
        }
        .tick-list li i {
            color: var(--primary);
            padding-top: 4px;
            font-size: 13px;
        }

        /* ========== Topic Showcase ========== */
        .cat-topics {
            background: var(--surface);
            padding: 96px 0;
            border-bottom: 1px solid var(--line);
        }
        .topic-panel {
            display: grid;
            grid-template-columns: 7fr 5fr;
            gap: 0;
            background: var(--bg);
            border: 1px solid var(--line);
            border-radius: 4px;
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .topic-main {
            padding: 42px;
            border-right: 1px solid var(--line);
        }
        .topic-main .topic-mini-label {
            font-size: 12px;
            letter-spacing: .18em;
            font-weight: 600;
            color: var(--primary);
            text-transform: uppercase;
        }
        .topic-main h3 {
            font-size: 24px;
            line-height: 1.4;
            margin: 14px 0 14px;
            font-weight: 600;
        }
        .topic-main p {
            color: var(--muted);
            line-height: 1.85;
            font-size: 15px;
        }
        .topic-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary-dark);
            margin-top: 18px;
        }
        .topic-link i {
            transition: transform .2s ease;
        }
        .topic-link:hover i {
            transform: translateX(4px);
        }
        .topic-side {
            display: flex;
            flex-direction: column;
            justify-content: center;
            padding: 42px;
            background: linear-gradient(135deg, rgba(29, 106, 102, .08), rgba(185, 140, 99, .04));
        }
        .topic-side-item {
            padding: 14px 0;
            border-top: 1px solid var(--line);
        }
        .topic-side-item:last-child {
            border-bottom: 1px solid var(--line);
        }
        .topic-side-item .side-label {
            display: inline-flex;
            align-items: baseline;
            gap: 10px;
            width: 100%;
            font-size: 16px;
            font-weight: 500;
            color: var(--ink);
            transition: color .2s;
        }
        .topic-side-item .side-label i {
            color: var(--accent);
            font-size: 11px;
            margin-top: 8px;
        }
        .topic-side-item:hover .side-label {
            color: var(--primary);
        }
        .topic-side-item .side-desc {
            font-size: 13px;
            color: var(--muted);
            margin: 6px 0 0 26px;
        }

        /* ========== Main + Sidebar Section ========== */
        .cat-info-area {
            padding: 96px 0;
            background: var(--bg);
        }
        .info-wrap {
            display: grid;
            grid-template-columns: 7.5fr 4.5fr;
            gap: 44px;
            align-items: start;
        }
        .main-content .content-block+.content-block {
            margin-top: 40px;
        }
        .content-img-rounded {
            border-radius: 4px;
            overflow: hidden;
            box-shadow: var(--shadow);
            margin-bottom: 22px;
        }
        .content-img-rounded img {
            width: 100%;
            aspect-ratio: 4/3;
            object-fit: cover;
        }
        .content-block h3 {
            display: flex;
            gap: 10px;
            align-items: center;
            font-size: 20px;
            margin: 0 0 8px;
            font-weight: 600;
        }
        .content-block h3 .dot {
            width: 6px;
            height: 6px;
            background: var(--primary);
            border-radius: 50%;
            display: inline-flex;
        }
        .content-block p {
            color: var(--muted);
            line-height: 1.85;
            margin-bottom: 0;
        }
        .content-note {
            background: #EFEDE5;
            border-left: 2px solid var(--primary);
            padding: 18px 20px;
            border-radius: 0 4px 4px 0;
            font-size: 14px;
            color: #555A54;
            margin-top: 20px;
        }

        .side-card {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: 4px;
            box-shadow: var(--shadow);
            margin-bottom: 24px;
            overflow: hidden;
        }
        .side-card-title {
            padding: 18px 22px 12px;
            border-bottom: 1px solid var(--line);
            font-size: 16px;
            font-weight: 600;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .side-card-title span.zh {
            font-size: 15px;
        }
        .side-card-title span.en {
            font-family: var(--font-num);
            font-size: 11px;
            color: var(--accent);
            letter-spacing: .12em;
        }
        .side-sub {
            padding: 4px 22px 18px;
        }
        .side-sub ul li a {
            display: flex;
            gap: 10px;
            align-items: baseline;
            padding: 11px 0;
            font-size: 14px;
            color: #3A403B;
            border-bottom: 1px dashed #E6E0D0;
            transition: all .2s ease;
        }
        .side-sub ul li a span {
            color: var(--primary);
            font-size: 12px;
            font-family: var(--font-num);
        }
        .side-sub ul li a:hover {
            color: var(--primary);
            padding-left: 4px;
        }
        .side-faq {
            padding: 6px 22px 20px;
        }
        .side-faq details {
            border-bottom: 1px dashed #E6E0D0;
            padding: 14px 0;
        }
        .side-faq summary {
            cursor: pointer;
            font-size: 15px;
            font-weight: 500;
            list-style: none;
            display: flex;
            gap: 8px;
            align-items: flex-start;
        }
        .side-faq summary::-webkit-details-marker {
            display: none;
        }
        .side-faq summary i {
            color: var(--primary);
            font-size: 12px;
            margin-top: 8px;
        }
        .side-faq details[open] summary i {
            transform: rotate(45deg);
        }
        .side-faq details p {
            margin: 10px 0 0 22px;
            color: var(--muted);
            font-size: 14px;
            line-height: 1.8;
        }

        /* ========== Scenario ========== */
        .cat-usage {
            background: #232A26;
            color: #F4F2EC;
            padding: 96px 0;
        }
        .cat-usage .section-label {
            color: #7EC2B4;
        }
        .cat-usage .section-label::before {
            background: #B98C63;
        }
        .cat-usage .section-title {
            color: #ffffff;
        }
        .cat-usage .section-sub {
            color: rgba(244, 242, 236, .7);
        }
        .usage-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 48px;
        }
        .usage-item {
            background: #2C352F;
            border: 1px solid rgba(255, 255, 255, .08);
            border-radius: 4px;
            padding: 28px 24px;
            transition: transform .2s ease, border-color .2s ease, background .2s ease;
        }
        .usage-item:hover {
            transform: translateY(-4px);
            border-color: rgba(185, 140, 99, .45);
            background: #313C34;
        }
        .usage-icon {
            width: 42px;
            height: 42px;
            border-radius: 4px;
            background: rgba(255, 255, 255, .06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            font-size: 18px;
            margin-bottom: 18px;
            border: 1px solid rgba(255, 255, 255, .06);
        }
        .usage-item h3 {
            font-size: 16px;
            margin: 0 0 8px;
            color: #fff;
            font-weight: 600;
        }
        .usage-item p {
            margin: 0;
            color: rgba(244, 242, 236, .62);
            font-size: 14px;
            line-height: 1.8;
        }

        /* ========== Process ========== */
        .cat-process {
            background: var(--surface);
            padding: 96px 0;
        }
        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            margin-top: 40px;
        }
        .process-step {
            position: relative;
            padding-top: 38px;
            border-top: 1px solid var(--line);
        }
        .process-step::after {
            content: "";
            position: absolute;
            top: -3px;
            left: 0;
            width: 5px;
            height: 5px;
            background: var(--primary);
            border-radius: 50%;
        }
        .step-no {
            font-family: var(--font-num);
            font-size: 13px;
            letter-spacing: .18em;
            color: var(--accent);
            font-weight: 700;
        }
        .process-step h3 {
            font-size: 18px;
            margin: 10px 0 8px;
            font-weight: 600;
        }
        .process-step p {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.8;
            margin-bottom: 0;
        }

        /* ========== FAQ ========== */
        .faq-section {
            background: #E9E6DC;
            padding: 96px 0;
        }
        .faq-layout {
            display: grid;
            grid-template-columns: 5fr 7fr;
            gap: 56px;
            align-items: start;
        }
        .faq-intro .faq-title {
            font-size: clamp(24px, 2.6vw, 34px);
            line-height: 1.3;
            font-weight: 600;
            margin: 12px 0 14px;
        }
        .faq-intro p {
            color: var(--muted);
            line-height: 1.85;
        }
        .faq-list details {
            border-bottom: 1px solid #C9C3B4;
            padding: 18px 6px;
        }
        .faq-list details:first-child {
            border-top: 1px solid #C9C3B4;
        }
        .faq-list summary {
            font-size: 17px;
            cursor: pointer;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            font-weight: 600;
        }
        .faq-list summary::-webkit-details-marker {
            display: none;
        }
        .faq-list summary .faq-icon {
            width: 26px;
            height: 26px;
            border-radius: 50%;
            border: 1px solid var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            color: var(--primary);
            flex: none;
            transition: all .2s;
        }
        .faq-list details[open] summary .faq-icon {
            background: var(--primary);
            color: #ffffff;
            transform: rotate(135deg);
        }
        .faq-list details p {
            margin: 14px 0 0;
            color: #63655F;
            line-height: 1.85;
            font-size: 15px;
            padding-right: 40px;
        }

        /* ========== Contact CTA ========== */
        .cat-contact {
            background: #1F2421;
            padding: 96px 0;
            color: #fff;
        }
        .contact-grid {
            display: grid;
            grid-template-columns: 5fr 7fr;
            gap: 60px;
            align-items: center;
        }
        .contact-title {
            font-size: clamp(24px, 3vw, 36px);
            font-weight: 600;
            margin: 0 0 16px;
            line-height: 1.3;
        }
        .contact-info {
            margin-top: 24px;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .contact-info li {
            display: flex;
            align-items: center;
            gap: 12px;
            color: rgba(255, 255, 255, .75);
            font-size: 15px;
        }
        .contact-info li i {
            color: var(--accent);
            width: 16px;
            text-align: center;
        }
        .contact-form-box {
            background: #FFFFFF;
            border-radius: 4px;
            padding: 28px;
            color: var(--ink);
            box-shadow: 0 12px 32px rgba(0, 0, 0, .2);
        }
        .form-label {
            display: block;
            font-size: 12px;
            letter-spacing: .08em;
            font-weight: 600;
            color: #595E58;
            margin: 0 0 6px;
        }
        .contact-form-box input,
        .contact-form-box textarea {
            width: 100%;
            border: 1px solid var(--line);
            border-radius: 4px;
            padding: 10px 12px;
            font-size: 15px;
            background: #FFF;
            margin-bottom: 16px;
            transition: border .2s, box-shadow .2s;
            outline: none;
        }
        .contact-form-box input:focus,
        .contact-form-box textarea:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(29, 106, 102, .12);
        }
        .contact-form-box textarea {
            min-height: 90px;
            resize: vertical;
        }
        .contact-form-box .btn {
            width: 100%;
            margin-top: 6px;
        }

        /* ========== Footer ========== */
        .site-footer {
            background: #1F2421;
            color: rgba(255, 255, 255, .72);
            font-size: 14px;
        }
        .footer-main {
            padding: 56px 0 32px;
            border-bottom: 1px solid rgba(255, 255, 255, .08);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 40px;
        }
        .footer-site-name {
            font-size: 22px;
            font-weight: 600;
            color: #fff;
            letter-spacing: .02em;
            margin-bottom: 12px;
        }
        .footer-brand-text {
            color: rgba(255, 255, 255, .55);
            font-size: 14px;
            line-height: 1.85;
        }
        .footer-title {
            font-size: 14px;
            color: #fff;
            font-weight: 600;
            margin: 0 0 16px;
            letter-spacing: .03em;
        }
        .footer-links li a,
        .footer-contact li {
            color: rgba(255, 255, 255, .6);
            padding: 5px 0;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            transition: color .2s;
        }
        .footer-links li a:hover {
            color: #fff;
        }
        .footer-contact {
            margin: 0;
        }
        .footer-contact li i {
            width: 16px;
            color: var(--accent);
            text-align: center;
        }
        .footer-bottom {
            padding: 18px 0;
            font-size: 13px;
        }
        .footer-bottom .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
        }
        .footer-bottom span {
            color: rgba(255, 255, 255, .4);
        }

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

        @media (max-width: 1024px) {
            .usage-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-steps {
                grid-template-columns: repeat(2, 1fr);
            }
            .edit-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .topic-panel {
                grid-template-columns: 1fr;
            }
            .topic-main {
                border-right: 0;
                border-bottom: 1px solid var(--line);
            }
            .info-wrap {
                grid-template-columns: 1fr;
            }
            .faq-layout {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .contact-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .section-pad,
            .cat-edit-hl,
            .cat-topics,
            .cat-info-area,
            .cat-usage,
            .cat-process,
            .faq-section,
            .cat-contact {
                padding-top: 72px;
                padding-bottom: 72px;
            }
        }

        @media (max-width: 640px) {
            .top-info-bar .info-action {
                display: none;
            }
            .header-inner {
                min-height: 64px;
            }
            .brand-logo-icon {
                width: 24px;
                height: 24px;
            }
            .brand-logo-name {
                font-size: 17px;
                line-height: 1.4;
            }
            .nav-toggle {
                display: flex;
            }
            .main-nav {
                position: absolute;
                left: 0;
                right: 0;
                top: 64px;
                background: #fff;
                border-bottom: 1px solid var(--line);
                box-shadow: 0 16px 32px rgba(0, 0, 0, .08);
                padding: 12px 20px 20px;
                transform: translateY(-120%);
                opacity: 0;
                visibility: hidden;
                transition: all .25s ease;
                z-index: -1;
            }
            .main-nav.is-open {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }
            .nav-links {
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
            }
            .nav-links a {
                min-height: 48px;
                border-bottom: 1px solid var(--line);
                border-radius: 0;
                margin-bottom: 0;
                padding: 0 8px;
                font-size: 16px;
                align-items: center;
            }
            .nav-links a.is-active {
                border-bottom-color: var(--line);
                color: var(--primary);
                background: #F7F5EF;
            }
            .category-hero {
                padding: 48px 0;
            }
            .category-hero h1 {
                font-size: 32px;
            }
            .category-hero .hero-lead {
                font-size: 16px;
            }
            .feature-row {
                gap: 12px;
                padding: 20px 6px;
            }
            .feature-index {
                min-width: 32px;
                font-size: 13px;
            }
            .feature-content h3 {
                font-size: 18px;
            }
            .topic-main,
            .topic-side {
                padding: 26px 22px;
            }
            .usage-grid,
            .process-steps {
                grid-template-columns: 1fr;
            }
            .usage-grid {
                gap: 14px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .footer-main {
                padding: 42px 0 28px;
            }
            .footer-bottom .container {
                flex-direction: column;
                text-align: center;
                gap: 6px;
            }
            .contact-form-box {
                padding: 20px;
            }
            .section-pad,
            .cat-edit-hl,
            .cat-topics,
            .cat-info-area,
            .cat-usage,
            .cat-process,
            .faq-section,
            .cat-contact {
                padding-top: 48px;
                padding-bottom: 48px;
            }
            .container,
            .grid-container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .side-card {
                margin-bottom: 18px;
            }
            .content-note {
                font-size: 14px;
            }
            .btn {
                min-height: 44px;
                padding: 0 18px;
                font-size: 14px;
            }
            .hero-actions .btn {
                width: 100%;
            }
        }

        @media (max-width: 780px) and (min-width: 641px) {
            .edit-grid {
                grid-template-columns: 1fr;
            }
            .info-wrap {
                grid-template-columns: 1fr;
            }
            .topic-main,
            .topic-side {
                padding: 28px;
            }
        }

/* roulang page: article */
:root {
    --c-bg: #F5F3EC;
    --c-surface: #FFFFFF;
    --c-ink: #1F2421;
    --c-weak: #6C706A;
    --c-brand: #1D6A66;
    --c-brand-dark: #14504C;
    --c-accent: #B98C63;
    --c-line: #E1DDD2;
    --c-dark: #1F2421;
    --c-error: #B8544C;
    --radius-s: 2px;
    --radius: 4px;
    --shadow-sm: 0 1px 2px rgba(20, 25, 23, 0.04), 0 8px 24px rgba(20, 25, 23, 0.06);
    --shadow-lg: 0 1px 2px rgba(20, 25, 23, 0.05), 0 20px 42px rgba(20, 25, 23, 0.10);
    --font-cn: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    --font-en: "Inter", "Helvetica Neue", Arial, sans-serif;
    --space-section: 96px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
    margin: 0;
    background: var(--c-bg);
    color: var(--c-ink);
    font-family: var(--font-cn);
    font-size: 15px;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
}
body.is-locked { overflow: hidden; }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: color .22s ease, border-color .22s ease, background .22s ease, opacity .22s ease; }
button, input, textarea, select { font-family: inherit; font-size: 100%; }
ul, ol { margin: 0; padding: 0; }
li { list-style: none; }
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
    outline: 2px solid var(--c-brand);
    outline-offset: 3px;
    border-radius: 2px;
}

.container { max-width: 1200px; margin: 0 auto; padding-left: 20px; padding-right: 20px; }
.grid-container { max-width: 1200px; margin-left: auto; margin-right: auto; padding-left: 20px; padding-right: 20px; }

.eyebrow {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-en);
    font-size: 12px;
    letter-spacing: .18em;
    text-transform: uppercase;
    color: var(--c-brand);
    font-weight: 600;
}
.eyebrow .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--c-accent); display: inline-block; margin-right: 4px; }

/* ------- topbar ------- */
.topbar {
    background: var(--c-ink);
    color: rgba(255,255,255,.72);
    border-bottom: 1px solid rgba(255,255,255,.06);
}
.topbar-inner {
    min-height: 36px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.topbar-domain {
    font-size: 12px;
    letter-spacing: .06em;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-en);
}
.topbar-domain i { color: var(--c-accent); font-size: 12px; }
.topbar-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    letter-spacing: .04em;
    color: #fff;
    padding-left: 18px;
    border-left: 1px solid rgba(255,255,255,.16);
}
.topbar-link:hover { color: #fff; opacity: .85; }
.topbar-link i { font-size: 12px; color: var(--c-accent); }

/* ------- header nav ------- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 80;
    background: rgba(255,255,255,.96);
    border-bottom: 1px solid var(--c-line);
    backdrop-filter: none;
}
.header-inner {
    position: relative;
    min-height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: nowrap;
}
.brand-logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}
.brand-logo-icon { color: var(--c-brand); flex: 0 0 auto; }
.brand-logo-name {
    font-size: 19px;
    font-weight: 700;
    letter-spacing: -.01em;
    white-space: nowrap;
    color: var(--c-ink);
}
.main-nav {
    display: flex;
    align-items: center;
}
.nav-links { display: flex; align-items: center; margin: 0; }
.nav-links li { margin-left: 26px; }
.nav-links a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 500;
    color: var(--c-ink);
    padding: 8px 0 6px;
    position: relative;
    line-height: 1.2;
}
.nav-links a::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 2px;
    background: var(--c-brand);
    transform: scaleX(0);
    transform-origin: left center;
    transition: transform .22s ease;
}
.nav-links a:hover { color: var(--c-brand); }
.nav-links a:hover::after,
.nav-links a.is-active::after { transform: scaleX(1); }
.nav-links a.is-active { color: var(--c-brand-dark); font-weight: 600; }
.nav-links i { font-size: 14px; color: var(--c-accent); opacity: .9; }

.nav-toggle {
    display: none;
    width: 44px;
    height: 44px;
    background: #fff;
    border: 1px solid var(--c-line);
    border-radius: 4px;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    cursor: pointer;
}
.nav-toggle span { display: block; width: 20px; height: 1.6px; background: var(--c-ink); transition: transform .24s ease, opacity .2s ease; }
body.nav-open .nav-toggle span:nth-child(1) { transform: translateY(6.6px) rotate(45deg); }
body.nav-open .nav-toggle span:nth-child(2) { opacity: 0; }
body.nav-open .nav-toggle span:nth-child(3) { transform: translateY(-6.6px) rotate(-45deg); }

/* ------- article hero ------- */
.article-hero {
    position: relative;
    color: #fff;
    padding: 64px 0 60px;
    background-color: #202421;
    background-image:
        linear-gradient(100deg, rgba(25,31,28,.94) 12%, rgba(31,38,35,.78) 54%, rgba(38,46,40,.62)),
        url('/assets/images/backpic/back-3.webp');
    background-size: cover;
    background-position: center 28%;
    border-bottom: 1px solid rgba(255,255,255,.08);
}
.article-hero-inner { position: relative; z-index: 2; }
.hero-breadcrumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    color: rgba(255,255,255,.64);
    letter-spacing: .04em;
    margin-bottom: 24px;
}
.hero-breadcrumb a { color: rgba(255,255,255,.74); }
.hero-breadcrumb a:hover { color: #fff; }
.hero-breadcrumb .sep { color: rgba(255,255,255,.36); }
.hero-breadcrumb .current { color: rgba(255,255,255,.95); }

.article-kicker {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    border: 1px solid rgba(255,255,255,.22);
    border-radius: var(--radius-s);
    padding: 5px 12px;
    font-size: 12px;
    letter-spacing: .12em;
    text-transform: uppercase;
    background: rgba(255,255,255,.07);
    color: #fff;
    margin-bottom: 18px;
}
.article-kicker i { color: var(--c-accent); }
.article-title {
    margin: 0 0 20px;
    font-size: clamp(30px, 4.4vw, 44px);
    line-height: 1.2;
    font-weight: 600;
    letter-spacing: -.015em;
    max-width: 960px;
}
.article-meta-list {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 18px;
    padding-top: 22px;
    border-top: 1px solid rgba(255,255,255,.16);
    font-size: 13px;
    color: rgba(255,255,255,.72);
}
.article-meta-list span { display: inline-flex; align-items: center; gap: 7px; }
.article-meta-list i { color: var(--c-accent); font-size: 13px; }
.article-meta-list .meta-strong { color: #fff; }

/* ------- article content ------- */
.article-main {
    padding: 64px 0 80px;
}
.paper-block {
    background: var(--c-surface);
    border: 1px solid var(--c-line);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    padding: clamp(28px, 5vw, 60px);
    margin-bottom: 48px;
}
.article-summary {
    border-left: 2px solid var(--c-brand);
    background: #F6F4EC;
    padding: 16px 20px 16px 22px;
    font-size: 16px;
    line-height: 1.9;
    color: var(--c-ink);
    margin-bottom: 36px;
    border-radius: 0 var(--radius-s) var(--radius-s) 0;
}
.article-summary strong { color: var(--c-brand-dark); font-weight: 600; }

.article-body { color: var(--c-ink); }
.article-body > p { margin: 0 0 1.5em; }
.article-body p { line-height: 1.95; }
.article-body h2 {
    font-size: 23px;
    font-weight: 600;
    line-height: 1.45;
    margin: 1.8em 0 .8em;
    padding-bottom: .3em;
    border-bottom: 1px solid var(--c-line);
}
.article-body h3 {
    font-size: 19px;
    font-weight: 600;
    line-height: 1.5;
    margin: 1.7em 0 .6em;
}
.article-body h4 {
    font-size: 17px;
    font-weight: 600;
    margin: 1.5em 0 .5em;
}
.article-body a {
    color: var(--c-brand-dark);
    border-bottom: 1px solid rgba(29,106,102,.3);
}
.article-body a:hover { border-bottom-color: var(--c-brand); color: var(--c-brand); }
.article-body ul,
.article-body ol {
    margin: 0 0 1.5em;
    padding-left: 24px;
}
.article-body ul li { list-style: disc; margin-bottom: .4em; }
.article-body ol li { list-style: decimal; margin-bottom: .4em; }
.article-body blockquote {
    margin: 1.8em 0;
    padding: .4em 0 .4em 1.5em;
    border-left: 2px solid var(--c-brand);
    font-size: 17px;
    line-height: 1.9;
    color: var(--c-weak);
}
.article-body img { border-radius: var(--radius); margin: 2rem auto; box-shadow: var(--shadow-sm); }
.article-body figure { margin: 2.2rem 0; }
.article-body figure img { margin: 0 auto 10px; }
.article-body figcaption {
    text-align: center;
    font-size: 13px;
    color: var(--c-weak);
    padding-top: 10px;
}
.article-body hr {
    border: 0;
    border-top: 1px solid var(--c-line);
    margin: 2.2em 0;
}
.article-body strong { font-weight: 600; }

.article-bottom {
    margin-top: 48px;
    padding-top: 26px;
    border-top: 1px solid var(--c-line);
}
.article-tag-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
    margin-bottom: 24px;
    font-size: 13px;
}
.article-tag-row .tag-label { color: var(--c-weak); font-family: var(--font-en); letter-spacing: .06em; text-transform: uppercase; }
.mini-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    border: 1px solid var(--c-line);
    background: #FBF9F4;
    padding: 4px 12px;
    border-radius: 2px;
    color: var(--c-ink);
    font-size: 13px;
}
.mini-tag i { color: var(--c-brand); font-size: 11px; }
.article-action-row {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
}
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 46px;
    padding: 0 28px;
    border-radius: var(--radius);
    border: 1px solid transparent;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: background .22s ease, color .22s ease, border-color .22s ease, box-shadow .22s ease, transform .12s ease;
}
.btn:active { transform: translateY(1px); }
.btn-dark { background: var(--c-dark); color: #fff; box-shadow: 0 1px 2px rgba(0,0,0,.05); }
.btn-dark:hover { background: var(--c-brand); color: #fff; }
.btn-outline { background: transparent; color: var(--c-ink); border-color: #C9C3B5; }
.btn-outline:hover { border-color: var(--c-ink); background: transparent; color: var(--c-ink); }

/* ------- related directory cards ------- */
.related-directory { margin-top: 16px; }
.related-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 26px;
}
.related-title {
    font-size: 20px;
    font-weight: 600;
    margin: 0;
}
.related-head .eyebrow { margin-top: 2px; }
.related-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}
.related-card {
    display: flex;
    flex-direction: column;
    background: #fff;
    border: 1px solid var(--c-line);
    border-radius: var(--radius);
    padding: 26px 26px 22px;
    min-height: 168px;
    box-shadow: 0 1px 2px rgba(20,25,23,.02);
    transition: border-color .22s ease, box-shadow .22s ease, transform .22s ease;
}
.related-card:hover {
    border-color: rgba(29,106,102,.42);
    box-shadow: var(--shadow-sm);
    transform: translateY(-2px);
}
.related-card .related-index { font-family: var(--font-en); font-size: 12px; font-weight: 600; color: var(--c-accent); letter-spacing: .1em; }
.related-card .related-name { font-size: 17px; font-weight: 600; margin: 12px 0 8px; line-height: 1.4; }
.related-card .related-desc { color: var(--c-weak); font-size: 14px; line-height: 1.7; margin: 0 0 14px; }
.related-card .related-more {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-top: auto;
    font-size: 14px;
    font-weight: 500;
    color: var(--c-brand-dark);
}
.related-card .related-more i { font-size: 12px; transition: transform .18s ease; }
.related-card:hover .related-more i { transform: translateX(4px); }

/* ------- not found ------- */
.notfound-zone { min-height: 56vh; display: flex; align-items: center; padding: 80px 0; }
.notfound-box {
    max-width: 640px;
    margin: 0 auto;
    text-align: center;
    background: #fff;
    border: 1px solid var(--c-line);
    border-radius: var(--radius);
    padding: clamp(36px, 6vw, 72px);
    box-shadow: var(--shadow-sm);
}
.notfound-code {
    display: inline-block;
    font-family: var(--font-en);
    font-size: 14px;
    letter-spacing: .3em;
    color: var(--c-error);
    border: 1px solid rgba(184,84,76,.3);
    background: rgba(184,84,76,.05);
    border-radius: var(--radius-s);
    padding: 4px 14px;
    margin-bottom: 18px;
}
.notfound-box h1 { font-size: 32px; margin: 0 0 12px; font-weight: 600; }
.notfound-box p { color: var(--c-weak); font-size: 15px; margin-bottom: 32px; }

/* ------- footer ------- */
.site-footer {
    background: var(--c-ink);
    color: rgba(255,255,255,.72);
    padding-top: 64px;
}
.footer-main { padding-bottom: 44px; }
.footer-grid {
    display: grid;
    grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
    gap: 44px;
}
.footer-site-name { color: #fff; font-size: 20px; font-weight: 700; margin-bottom: 12px; letter-spacing: -.01em; }
.footer-brand-text { color: rgba(255,255,255,.6); font-size: 14px; line-height: 1.85; max-width: 340px; margin: 0; }
.footer-title {
    color: #fff;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 18px;
}
.footer-links { display: flex; flex-direction: column; gap: 11px; }
.footer-links a, .footer-links li { color: rgba(255,255,255,.62); font-size: 14px; }
.footer-links a:hover { color: #fff; }
.footer-contact { display: flex; flex-direction: column; gap: 12px; }
.footer-contact li { display: flex; align-items: flex-start; gap: 10px; font-size: 14px; color: rgba(255,255,255,.62); }
.footer-contact i { color: var(--c-accent); margin-top: 5px; width: 15px; text-align: center; font-size: 13px; }
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,.12);
    background: rgba(0,0,0,.12);
}
.footer-bottom .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 56px;
    font-size: 13px;
    color: rgba(255,255,255,.52);
    flex-wrap: wrap;
    gap: 8px;
}
.footer-bottom span { letter-spacing: .02em; }

@media (max-width: 1024px) {
    :root { --space-section: 72px; }
    .article-main { padding: 48px 0 62px; }
}

@media (max-width: 880px) {
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}

@media (max-width: 767px) {
    :root { --space-section: 48px; }
    body { font-size: 14px; }
    .brand-logo-name { font-size: 17px; }
    .grid-container { padding-left: 16px; padding-right: 16px; }
    .container { padding-left: 16px; padding-right: 16px; }

    .nav-toggle { display: inline-flex; }
    .main-nav {
        position: absolute;
        top: 72px;
        left: -16px;
        right: -16px;
        background: #fff;
        border-bottom: 1px solid var(--c-line);
        max-height: 0;
        overflow: hidden;
        visibility: hidden;
        opacity: 0;
        transition: max-height .28s ease, opacity .22s ease, visibility .22s;
        box-shadow: 0 24px 40px rgba(20,25,23,.14);
    }
    body.nav-open .main-nav {
        max-height: calc(100vh - 72px);
        overflow-y: auto;
        visibility: visible;
        opacity: 1;
    }
    body.nav-open { overflow: hidden; }
    .nav-links {
        display: flex;
        flex-direction: column;
        padding: 18px 20px 26px;
        gap: 4px;
    }
    .nav-links li { margin-left: 0; border-bottom: 1px solid #F0EDE5; }
    .nav-links a {
        font-size: 22px;
        padding: 15px 0;
        width: 100%;
        justify-content: space-between;
        display: flex;
        line-height: 1.3;
    }
    .nav-links a::after { content: none; }
    .nav-links a.is-active { background: #F7F5EF; padding-left: 14px; color: var(--c-brand-dark); }

    .article-hero { padding: 40px 0 46px; }
    .article-meta-list { gap: 12px 16px; }
    .article-title { margin-top: 0; }
    .paper-block { padding: 24px 18px; }
    .article-summary { font-size: 15px; padding: 14px 16px; }

    .related-grid { grid-template-columns: 1fr; gap: 12px; }
    .related-card { padding: 22px 20px; }
    .footer-grid { grid-template-columns: 1fr; gap: 28px; }
    .footer-bottom .container { justify-content: center; text-align: center; padding-top: 12px; padding-bottom: 12px; }
}

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

/* roulang page: category3 */
:root {
  --page-bg: #F5F3EC;
  --surface: #FFFFFF;
  --text-main: #1F2421;
  --text-muted: #6C706A;
  --brand-primary: #1D6A66;
  --brand-dark: #14504C;
  --accent: #B98C63;
  --hairline: #E1DDD2;
  --deep-bg: #1F2421;
  --radius-sm: 2px;
  --radius: 4px;
  --shadow-soft: 0 1px 2px rgba(20,25,23,0.04), 0 8px 24px rgba(20,25,23,0.06);
  --shadow-hover: 0 1px 2px rgba(20,25,23,0.05), 0 14px 30px rgba(20,25,23,0.10);
  --space-section: 96px;
}
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  background: var(--page-bg);
  color: var(--text-main);
  font-family: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  line-height: 1.75;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}
img {
  max-width: 100%;
  display: inline-block;
}
a {
  color: inherit;
  text-decoration: none;
  transition: color 0.25s ease, border-color 0.25s ease, background-color 0.25s ease, box-shadow 0.25s ease;
}
a:hover, a:focus {
  outline: none;
}
ul, ol {
  list-style: none;
}
button, input, textarea, select {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}
:focus-visible {
  outline: 2px solid var(--brand-primary);
  outline-offset: 2px;
}

/* ============ 全局容器 ============ */
.grid-container {
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}

/* ============ 分隔版式 ============ */
section {
  padding: var(--space-section) 0;
}
.section-label {
  font-family: "Inter", "Helvetica Neue", Arial, sans-serif;
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 8px;
  display: block;
}
.section-title {
  font-size: clamp(24px, 3vw, 40px);
  font-weight: 600;
  line-height: 1.2;
  color: var(--text-main);
  margin-bottom: 16px;
}
.section-desc {
  font-size: 15px;
  color: var(--text-muted);
  max-width: 760px;
}
.section-desc strong {
  color: var(--text-main);
  font-weight: 600;
}

/* ============ 头部 ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 300;
  background: var(--surface);
  box-shadow: 0 1px 2px rgba(20,25,23,0.04);
  border-bottom: 3px solid var(--deep-bg);
}
.header-top {
  background: var(--deep-bg);
  color: rgba(255,255,255,0.72);
  font-size: 12px;
  height: 36px;
  line-height: 36px;
}
.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.topbar-inner .topbar-domain {
  letter-spacing: 0.02em;
}
.topbar-inner .topbar-domain i {
  margin-right: 6px;
  color: var(--accent);
}
.topbar-link {
  color: rgba(255,255,255,0.85);
  padding: 0 8px;
  transition: color 0.25s ease;
}
.topbar-link i {
  margin-left: 5px;
}
.topbar-link:hover {
  color: #fff;
}
.header-main {
  border-bottom: 0;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
}
.brand-logo {
  display: flex;
  align-items: center;
  gap: 9px;
  color: var(--text-main);
}
.brand-logo-icon {
  color: var(--brand-primary);
  flex: 0 0 auto;
}
.brand-logo-name {
  font-size: 21px;
  font-weight: 600;
  letter-spacing: -0.01em;
  white-space: nowrap;
}
/* nav */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--hairline);
  background: var(--surface);
  border-radius: var(--radius);
  cursor: pointer;
  gap: 4px;
}
.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-main);
  transition: transform 0.2s ease, opacity 0.2s ease;
}
.nav-toggle.open span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}
.nav-toggle.open span:nth-child(2) {
  opacity: 0;
}
.nav-toggle.open span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}
.main-nav .nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}
.main-nav .nav-links > li {
  line-height: 1;
}
.main-nav .nav-links a {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 15px;
  font-size: 14px;
  color: var(--text-muted);
  border-bottom: 2px solid transparent;
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}
.main-nav .nav-links a i {
  font-size: 12px;
  color: var(--accent);
}
.main-nav .nav-links a:hover {
  color: var(--text-main);
}
.main-nav .nav-links a.is-active {
  color: var(--brand-primary);
  border-bottom-color: var(--brand-primary);
  font-weight: 500;
}

/* ============ 页面 Hero ============ */
.page-hero {
  position: relative;
  padding: 96px 0;
  background-color: var(--page-bg);
  background-size: cover;
  background-position: center;
  overflow: hidden;
}
.cate-hero {
  padding: 90px 0 80px;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(245,243,236,0.93), rgba(245,243,236,0.72) 65%, rgba(245,243,236,0.45));
  z-index: 1;
}
.page-hero .grid-container {
  position: relative;
  z-index: 2;
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 22px;
}
.breadcrumb i {
  font-size: 11px;
  color: var(--accent);
}
.breadcrumb a {
  color: var(--brand-primary);
}
.breadcrumb a:hover {
  color: var(--brand-dark);
}
.page-hero h1 {
  font-size: clamp(34px, 5vw, 58px);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin-bottom: 14px;
  color: var(--text-main);
}
.page-hero .hero-description {
  font-size: 17px;
  line-height: 1.8;
  color: var(--text-muted);
  max-width: 640px;
}

/* ============ 主导与侧栏 ============ */
.support-overview {
  padding: var(--space-section) 0 40px;
}
.main-article-content {
  padding-right: 24px;
}
.side-index-col {
  border-left: 5px solid var(--brand-dark);
  background: var(--surface);
  padding: 30px 28px;
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
  margin-bottom: 24px;
}
.side-index-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 8px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--hairline);
  margin-bottom: 12px;
}
.side-index-title:before {
  content: "";
  width: 3px;
  height: 15px;
  background: var(--brand-primary);
  border-radius: 2px;
}
.side-index-list li {
  border-bottom: 1px solid var(--hairline);
}
.side-index-list li:last-child {
  border-bottom: 0;
}
.side-index-list a {
  display: block;
  padding: 12px 2px;
  font-size: 14px;
  color: var(--text-muted);
}
.side-index-list a:hover {
  color: var(--brand-primary);
  padding-left: 6px;
}
.side-contact-card {
  background: var(--deep-bg);
  color: rgba(255,255,255,0.9);
  border-radius: var(--radius);
  padding: 24px;
}
.side-contact-card h4 {
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}
.side-contact-card p {
  font-size: 13px;
  color: rgba(255,255,255,0.68);
  margin-bottom: 14px;
}
.side-contact-btn {
  background: var(--brand-primary);
  color: #fff;
  border-radius: var(--radius);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  height: 40px;
  padding: 0 18px;
  border: 1px solid transparent;
  transition: background 0.2s ease, transform 0.2s ease;
}
.side-contact-btn:hover {
  background: #fff;
  color: var(--text-main);
  transform: translateY(-1px);
}

/* 内容图文 */
.content-block {
  margin-bottom: 30px;
}
.content-lead {
  font-size: 18px;
  line-height: 1.8;
  color: var(--text-main);
  margin-bottom: 18px;
}
.content-block h3 {
  font-size: 20px;
  font-weight: 600;
  margin: 28px 0 12px;
  line-height: 1.4;
}
.content-block p {
  color: var(--text-muted);
  margin-bottom: 10px;
}
.supp-list {
  margin: 18px 0;
}
.supp-list li {
  position: relative;
  padding: 14px 20px;
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: 4px;
  margin-bottom: 12px;
  font-size: 14px;
  line-height: 1.7;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.supp-list li::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 1px;
  position: absolute;
  left: 10px;
  top: 21px;
}
.supp-list li:hover {
  border-color: var(--brand-primary);
  box-shadow: var(--shadow-soft);
}
.supp-list strong {
  color: var(--text-main);
  font-weight: 600;
}

/* 专题说明行 */
.sector-list {
  margin-top: 22px;
}
.sector-item {
  display: flex;
  flex-direction: row;
  align-items: flex-start;
  gap: 20px;
  padding: 25px 0;
  border-bottom: 1px solid var(--hairline);
  cursor: default;
  transition: background 0.25s ease;
}
.sector-item:first-child {
  border-top: 1px solid var(--hairline);
}
.sector-item .sector-num {
  font-family: "Inter", sans-serif;
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.08em;
  padding-top: 4px;
}
.sector-item .sector-body {
  flex: 1;
}
.sector-item .sector-title {
  font-size: 20px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text-main);
}
.sector-item .sector-description {
  font-size: 14px;
  color: var(--text-muted);
  max-width: 640px;
  margin-top: 6px;
}
.sector-item .sector-arrow {
  font-size: 18px;
  color: var(--text-muted);
  padding-top: 8px;
}
.sector-item:hover {
  background: var(--surface);
}
.sector-item:hover .sector-arrow {
  color: var(--brand-primary);
  transform: translateX(4px);
}
.sector-item:hover .sector-title {
  color: var(--brand-primary);
}

/* ============ 场景视觉区 ============ */
.scenario-section {
  background: var(--surface);
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
}
.scenario-grid {
  margin-top: 36px;
  row-gap: 16px;
}
.scenario-card {
  padding: 8px;
}
.scenario-feature {
  background: var(--page-bg);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  padding: 22px;
  height: 100%;
  transition: box-shadow 0.25s ease, transform 0.25s ease;
}
.scenario-feature:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}
.scenario-feature .scenario-icon {
  font-size: 24px;
  color: var(--brand-primary);
  margin-bottom: 14px;
}
.scenario-feature h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-main);
}
.scenario-feature p {
  font-size: 14px;
  color: var(--text-muted);
}

/* 图片场景卡 */
.media-card {
  background: var(--page-bg);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  overflow: hidden;
}
.media-card .media-photo {
  overflow: hidden;
}
.media-card .media-photo img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.media-card:hover .media-photo img {
  transform: scale(1.02);
}
.media-card .media-content {
  padding: 22px;
}
.media-card .media-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-main);
}
.media-card .media-text {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.75;
}
.media-tag {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  background: rgba(29,106,102,0.1);
  color: var(--brand-primary);
  font-size: 11px;
  border-radius: 30px;
  letter-spacing: 0.04em;
  margin-bottom: 10px;
}

/* ============ 服务流程 ============ */
.steps-panel {
  background: var(--deep-bg);
  color: rgba(255,255,255,0.88);
  padding: 70px 0;
  margin-top: 20px;
}
.steps-panel .section-label {
  color: var(--accent);
}
.steps-panel h2 {
  color: #fff;
}
.steps-panel p {
  color: rgba(255,255,255,0.7);
}
.steps-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  margin-top: 50px;
}
.step-item {
  padding: 0 26px;
  border-left: 1px solid rgba(255,255,255,0.18);
  position: relative;
}
.step-item:first-child {
  border-left: 0;
  padding-left: 0;
}
.step-item .step-num {
  font-family: "Inter", sans-serif;
  font-size: 14px;
  letter-spacing: 0.12em;
  color: var(--accent);
  font-weight: 600;
  display: block;
  margin-bottom: 10px;
}
.step-item h3 {
  color: #fff;
  font-size: 18px;
  font-weight: 600;
  line-height: 1.35;
  margin-bottom: 8px;
}
.step-item p {
  font-size: 14px;
  color: rgba(255,255,255,0.62);
  line-height: 1.7;
}

/* ============ FAQ ============ */
.faq-section {
  background: var(--page-bg);
  padding: var(--space-section) 0;
}
.faq-headline {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 30px;
  margin-bottom: 30px;
}
.accordion-item {
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
}
.accordion-item details summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 20px 24px;
  cursor: pointer;
  color: var(--text-main);
  font-size: 16px;
  font-weight: 500;
}
.accordion-item details summary .fa-plus {
  color: var(--accent);
  transition: transform 0.2s ease, color 0.2s ease;
}
.accordion-item details[open] summary .fa-plus {
  transform: rotate(45deg);
  color: var(--brand-primary);
}
.accordion-item .faq-body {
  padding: 0 24px 18px;
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.9;
}

/* ============ CTA / 联系 ============ */
.cta-section {
  background: var(--deep-bg);
  color: rgba(255,255,255,0.9);
  padding: 0;
}
.cta-main {
  padding: var(--space-section) 0;
}
.cta-main .section-title {
  color: #fff;
}
.cta-info {
  font-size: 15px;
  color: rgba(255,255,255,0.74);
  margin-bottom: 22px;
  line-height: 1.9;
}
.cta-info .domain-name {
  font-weight: 500;
  color: #fff;
}
.cta-contact-list {
  margin-top: 12px;
}
.cta-contact-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 0;
  border-bottom: 1px solid rgba(255,255,255,0.14);
  font-size: 14px;
}
.cta-contact-list li:last-child {
  border-bottom: 0;
}
.cta-contact-list i {
  width: 22px;
  color: var(--accent);
  font-size: 15px;
}
.cta-form {
  background: var(--surface);
  color: var(--text-main);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow-hover);
}
.form-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 6px;
}
.form-sub {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 18px;
}
.form-field {
  margin-bottom: 16px;
}
.form-field label {
  display: block;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 6px;
}
.form-field input,
.form-field textarea {
  width: 100%;
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  background: #fff;
  padding: 11px 14px;
  font-size: 15px;
  line-height: 1.6;
  transition: border 0.2s ease, box-shadow 0.2s ease;
}
.form-field textarea {
  min-height: 100px;
  resize: vertical;
}
.form-field input:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--brand-primary);
  box-shadow: 0 0 0 3px rgba(29,106,102,0.12);
}
.form-submit {
  width: 100%;
  height: 46px;
  background: var(--deep-bg);
  color: #fff;
  border: 0;
  border-radius: var(--radius);
  font-size: 15px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background 0.25s ease, transform 0.1s ease;
}
.form-submit:hover {
  background: var(--brand-primary);
}
.form-submit:active {
  transform: translateY(1px);
}
.form-note {
  font-size: 12px;
  color: var(--text-muted);
  text-align: center;
  margin-top: 12px;
}

/* ============ 页脚 ============ */
.site-footer {
  background: var(--deep-bg);
  color: rgba(255,255,255,0.7);
  padding: 64px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.9fr 1fr 1fr;
  gap: 36px;
  padding-bottom: 44px;
}
.footer-site-name {
  font-size: 22px;
  font-weight: 600;
  color: #fff;
  letter-spacing: -0.01em;
  margin-bottom: 12px;
}
.footer-brand-text {
  font-size: 14px;
  line-height: 1.75;
  color: rgba(255,255,255,0.58);
  max-width: 230px;
}
.footer-title {
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 16px;
}
.footer-links li,
.footer-contact li {
  margin-bottom: 10px;
}
.footer-links a,
.footer-contact a {
  font-size: 14px;
  color: rgba(255,255,255,0.62);
  line-height: 1.6;
}
.footer-links a:hover,
.footer-contact a:hover {
  color: #fff;
}
.footer-contact li {
  display: flex;
  align-items: center;
  gap: 8px;
}
.footer-contact i {
  width: 16px;
  color: var(--accent);
  font-size: 14px;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.15);
  padding: 18px 0;
}
.footer-bottom-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  justify-content: space-between;
  font-size: 13px;
  color: rgba(255,255,255,0.55);
}

/* ============ 响应式 ============ */
@media screen and (max-width: 1024px) {
  :root {
    --space-section: 72px;
  }
  .steps-row {
    grid-template-columns: repeat(2, 1fr);
    row-gap: 36px;
    column-gap: 20px;
  }
  .step-item {
    border-left: 0;
    padding: 0;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    row-gap: 30px;
  }
  .scenario-grid .cell {
    flex: 0 0 50%;
    max-width: 50%;
  }
}
@media screen and (max-width: 820px) {
  .page-hero {
    padding: 70px 0;
  }
  .nav-toggle {
    display: flex;
  }
  .main-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--surface);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    box-shadow: 0 8px 20px rgba(20,25,23,0.08);
  }
  .main-nav.open {
    max-height: 480px;
  }
  .main-nav .nav-links {
    flex-direction: column;
    padding: 10px 20px 25px;
  }
  .main-nav .nav-links li {
    width: 100%;
  }
  .main-nav .nav-links a {
    padding: 14px 6px;
    font-size: 18px;
    border-bottom: 1px solid var(--hairline);
    border-radius: 0;
  }
}
@media screen and (max-width: 767px) {
  body {
    font-size: 14px;
  }
  .grid-container {
    padding-left: 20px;
    padding-right: 20px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .steps-row {
    grid-template-columns: 1fr;
    gap: 26px;
  }
  .scenario-grid .cell {
    flex: 0 0 100%;
    max-width: 100%;
  }
}

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

/* roulang page: category2 */
:root{
  --paper:#F5F3EC;
  --surface:#FFFFFF;
  --ink:#1F2421;
  --muted:#6C706A;
  --brand:#1D6A66;
  --brand-deep:#14504C;
  --accent:#B98C63;
  --border:#E1DDD2;
  --error:#B8544C;
  --radius:4px;
  --shadow:0 1px 2px rgba(20,25,23,0.04), 0 8px 24px rgba(20,25,23,0.06);
  --shadow-hover:0 2px 4px rgba(20,25,23,0.06), 0 12px 30px rgba(20,25,23,0.10);
  --font-serif-cn:"PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-latin:"Inter", "Helvetica Neue", Arial, sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth; scroll-padding-top:90px;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-serif-cn);
  font-size:15px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%; height:auto; display:block;}
a{color:inherit; text-decoration:none; transition:color .2s ease, background-color .2s ease, border-color .2s ease;}
button,input,textarea,select{font-family:inherit; font-size:inherit; color:inherit;}
h1,h2,h3,h4,h5,h6{
  margin:0 0 .6em;
  font-family:var(--font-serif-cn);
  line-height:1.35;
  color:var(--ink);
  font-weight:600;
}
h1{font-size:clamp(30px, 4.6vw, 50px); line-height:1.18; letter-spacing:-.01em; margin:0 0 .4em;}
h2{font-size:clamp(24px, 3vw, 36px); line-height:1.25; letter-spacing:-.01em;}
h3{font-size:20px; line-height:1.4;}
p{margin:0 0 1.25em;}
.container{max-width:1200px; margin:0 auto; padding:0 24px;}
.section{padding:96px 0;}
.section-tight{padding:64px 0;}
.section-white{background:var(--surface);}
.section-line{border-top:1px solid var(--border); border-bottom:1px solid var(--border);}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-latin), var(--font-serif-cn);
  font-size:12px;
  font-weight:600;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--brand);
  margin:0 0 12px;
}
.eyebrow::before{content:""; width:28px; height:1px; background:var(--accent); display:inline-block;}
.section-head{max-width:760px; margin-bottom:42px;}
.section-head h2{margin-bottom:14px;}
.section-head p{color:var(--muted); margin:0;}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:46px;
  padding:0 24px;
  border:1px solid var(--ink);
  border-radius:var(--radius);
  font-size:14px;
  font-weight:600;
  letter-spacing:.02em;
  background:var(--ink);
  color:#fff;
  line-height:1;
  cursor:pointer;
  transition:background-color .22s ease,color .22s ease,border-color .22s ease,box-shadow .22s ease,transform .12s ease;
}
.btn:hover{background:var(--brand); border-color:var(--brand); color:#fff;}
.btn:active{transform:translateY(1px);}
.btn:focus-visible{outline:2px solid var(--brand); outline-offset:3px;}
.btn-outline{background:transparent; color:var(--ink); border:1px solid rgba(31,36,33,.35);}
.btn-outline:hover{background:transparent; border-color:var(--ink); color:var(--ink); box-shadow:0 2px 10px rgba(20,25,23,.05);}
.btn-light{background:var(--surface); color:var(--ink); border:1px solid var(--surface);}
.btn-light:hover{background:var(--brand); border-color:var(--brand); color:#fff;}
img{background:#EAE6D9;}

/* Header */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(255,255,255,.94);
  border-bottom:1px solid var(--border);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  min-height:72px;
  gap:24px;
}
.brand-logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
  color:var(--brand-deep);
}
.brand-logo-icon{flex-shrink:0;}
.brand-logo-name{
  font-size:20px;
  font-weight:700;
  letter-spacing:-.01em;
  color:var(--ink);
  white-space:nowrap;
}
.nav-toggle{
  display:none;
  width:44px;
  height:44px;
  border:1px solid var(--border);
  background:var(--surface);
  border-radius:var(--radius);
  cursor:pointer;
  flex-direction:column;
  justify-content:center;
  align-items:center;
  gap:5px;
  padding:0;
}
.nav-toggle span{
  width:20px;
  height:2px;
  background:var(--ink);
  display:block;
  border-radius:2px;
  transition:transform .2s ease,opacity .2s ease;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
.main-nav{display:flex; align-items:center;}
.nav-links{
  list-style:none;
  display:flex;
  align-items:center;
  gap:4px;
  margin:0;
  padding:0;
}
.nav-links li{margin:0;}
.nav-links a{
  display:flex;
  align-items:center;
  gap:7px;
  padding:12px 16px;
  font-size:15px;
  color:var(--ink);
  position:relative;
  white-space:nowrap;
}
.nav-links a i{font-size:13px; color:var(--brand); opacity:.75; transition:opacity .2s;}
.nav-links a::after{
  content:"";
  position:absolute;
  left:16px;
  right:16px;
  bottom:6px;
  height:1px;
  background:var(--brand);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .2s ease;
}
.nav-links a:hover{color:var(--brand-deep);}
.nav-links a:hover::after{transform:scaleX(1);}
.nav-links a.is-active{
  color:var(--brand-deep);
  font-weight:600;
}
.nav-links a.is-active::after{transform:scaleX(1);}
.nav-links a:focus-visible{
  outline:2px solid var(--brand);
  outline-offset:2px;
  border-radius:2px;
}

/* Hero */
.page-hero{
  position:relative;
  z-index:1;
  min-height:320px;
  padding:80px 0 72px;
  display:flex;
  align-items:center;
  background:
    linear-gradient(to bottom, rgba(245,243,236,.72), rgba(245,243,236,.84)),
    url("/assets/images/backpic/back-1.png") center / cover no-repeat;
  border-bottom:1px solid var(--border);
}
.page-hero .container{position:relative; z-index:2;}
.breadcrumb{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:12px;
  color:var(--muted);
  font-family:var(--font-latin), var(--font-serif-cn);
  margin-bottom:26px;
}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb .sep{color:var(--accent); opacity:.7;}
.hero-note{
  display:inline-block;
  background:rgba(29,106,102,.08);
  color:var(--brand-deep);
  border:1px solid rgba(29,106,102,.16);
  border-radius:2px;
  padding:5px 12px 6px;
  font-size:12px;
  letter-spacing:.06em;
  margin-bottom:16px;
}
.page-hero p.lead{
  max-width:680px;
  color:var(--ink);
  font-size:16px;
  line-height:1.9;
  margin:0 0 32px;
}
.hero-actions{display:flex; gap:14px; flex-wrap:wrap;}

/* Service Overview */
.split-block{
  display:grid;
  grid-template-columns:minmax(0,1.2fr) minmax(300px,.8fr);
  gap:56px;
  align-items:center;
}
.overview-copy .feature-columns{
  list-style:none;
  margin:22px 0 0;
  padding:0;
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:0;
  border-top:1px solid var(--border);
}
.overview-copy .feature-columns li{
  padding:14px 18px 14px 0;
  border-bottom:1px solid var(--border);
  color:var(--ink);
  font-size:14px;
  display:flex;
  gap:10px;
  align-items:flex-start;
}
.overview-copy .feature-columns li i{
  color:var(--brand);
  font-size:12px;
  margin-top:6px;
}
.intro-card{
  background:var(--surface);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  padding:34px;
  border:1px solid var(--border);
}
.intro-card .card-number{
  font-family:var(--font-latin), var(--font-serif-cn);
  font-weight:700;
  color:var(--accent);
  font-size:32px;
  line-height:1;
  display:block;
  margin-bottom:14px;
}
.intro-card h3{font-size:20px; margin-bottom:10px;}
.intro-card p{color:var(--muted); font-size:14px; margin-bottom:20px;}
.intro-card .btn{width:100%;}

/* Directory guide */
.guide-layout{
  display:grid;
  grid-template-columns:minmax(0,1.9fr) minmax(280px,.85fr);
  gap:48px;
  align-items:start;
}
.guide-list{border-top:1px solid var(--border);}
.guide-item{
  display:grid;
  grid-template-columns:74px 1fr;
  gap:20px;
  padding:34px 8px 34px 0;
  border-bottom:1px solid var(--border);
  transition:background-color .2s ease;
}
.guide-item:hover{background:rgba(255,255,255,.64);}
.guide-item .digit{
  font-family:var(--font-latin), var(--font-serif-cn);
  font-size:17px;
  font-weight:700;
  color:var(--accent);
  background:rgba(185,140,99,.09);
  border:1px solid rgba(185,140,99,.22);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:46px;
  height:46px;
  border-radius:2px;
}
.guide-item h3{font-size:19px; margin-bottom:6px;}
.guide-item p{color:var(--muted); margin:0; font-size:14px; line-height:1.8;}
.side-panel{position:sticky; top:100px;}
.panel-box{
  background:var(--surface);
  border:1px solid var(--border);
  box-shadow:var(--shadow);
  border-radius:var(--radius);
  padding:28px;
  margin-bottom:20px;
}
.panel-box .panel-title{
  font-size:13px;
  letter-spacing:.16em;
  color:var(--brand-deep);
  text-transform:uppercase;
  margin-bottom:18px;
  font-weight:700;
  display:flex;
  align-items:center;
  gap:8px;
}
.panel-box .panel-title i{color:var(--accent); font-size:13px;}
.panel-index{list-style:none; margin:0; padding:0;}
.panel-index li{border-bottom:1px solid var(--border);}
.panel-index li:last-child{border-bottom:0;}
.panel-index a{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:11px 2px;
  font-size:14px;
  color:var(--ink);
}
.panel-index a i{color:var(--accent); font-size:11px; opacity:0;}
.panel-index a:hover{color:var(--brand-deep);}
.panel-index a:hover i{opacity:1; transform:translateX(2px);}
.panel-address{
  font-family:var(--font-latin), var(--font-serif-cn);
  font-size:17px;
  font-weight:700;
  color:var(--brand-deep);
  margin:6px 0 10px;
}
.panel-box .hint{font-size:13px; color:var(--muted); margin-bottom:0;}

/* Image block */
.image-note{
  margin-top:34px;
  border-radius:var(--radius);
  overflow:hidden;
  border:1px solid var(--border);
  background:var(--surface);
  box-shadow:var(--shadow);
}
.image-note img{
  object-fit:cover;
  width:100%;
  aspect-ratio:16 / 8;
}
.image-note figcaption{
  padding:12px 18px;
  font-size:13px;
  color:var(--muted);
}

/* Scene */
.scene-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:2px;
  background:var(--border);
  border:1px solid var(--border);
  border-radius:var(--radius);
  overflow:hidden;
}
.scene-item{
  background:var(--paper);
  padding:34px;
  min-height:220px;
  display:flex;
  flex-direction:column;
  gap:8px;
  transition:background-color .2s ease;
}
.scene-item:hover{background:var(--surface);}
.scene-item .scene-no{
  font-family:var(--font-latin), var(--font-serif-cn);
  font-size:12px;
  font-weight:700;
  letter-spacing:.16em;
  color:var(--accent);
}
.scene-item h3{font-size:18px; margin-bottom:0;}
.scene-item p{color:var(--muted); font-size:14px; margin:0;}
.scene-item .scene-link{
  margin-top:auto;
  font-size:13px;
  color:var(--brand);
  display:flex;
  align-items:center;
  gap:6px;
}

/* Process */
.process-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:2px;
  background:var(--border);
  border:1px solid var(--border);
  border-radius:var(--radius);
  overflow:hidden;
}
.process-card{
  background:var(--surface);
  padding:28px 24px;
  min-height:180px;
  display:flex;
  flex-direction:column;
  transition:box-shadow .2s ease;
}
.process-card:hover{box-shadow:var(--shadow-hover); position:relative; z-index:1;}
.process-step{
  font-family:var(--font-latin), var(--font-serif-cn);
  font-size:13px;
  font-weight:700;
  letter-spacing:.12em;
  color:var(--brand);
  margin-bottom:20px;
  display:flex;
  align-items:center;
  gap:8px;
}
.process-step::before{content:"STEP"; font-size:10px; color:var(--accent); letter-spacing:.16em;}
.process-card h3{font-size:17px; margin-bottom:10px;}
.process-card p{font-size:14px; color:var(--muted); margin:0;}

/* Stats dark band */
.stat-band{
  background:var(--ink);
  color:#fff;
  padding:52px 0;
  margin:96px 0;
}
.stat-band .inner{
  display:flex;
  align-items:stretch;
}
.stat-item{
  flex:1;
  padding:6px 24px;
  border-left:1px solid rgba(255,255,255,.14);
}
.stat-item:first-of-type{border-left:0;}
.stat-item .stat-value{
  font-family:var(--font-latin), var(--font-serif-cn);
  font-size:clamp(26px, 3vw, 44px);
  line-height:1;
  margin-bottom:10px;
  color:#fff;
  font-weight:600;
}
.stat-item .stat-label{
  font-size:12px;
  letter-spacing:.1em;
  color:rgba(255,255,255,.72);
}
.stat-item .stat-value em{
  font-style:normal;
  color:var(--accent);
  font-size:.55em;
  margin-left:4px;
}

/* FAQ */
.faq-wrap{max-width:900px;}
.faq-item{border-bottom:1px solid var(--border);}
.faq-item:first-of-type{border-top:1px solid var(--border);}
.faq-question{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  background:transparent;
  border:0;
  text-align:left;
  padding:22px 6px;
  font-size:17px;
  font-weight:600;
  cursor:pointer;
  color:var(--ink);
}
.faq-question::after{
  content:"+";
  font-family:var(--font-latin), "PingFang SC", sans-serif;
  font-size:24px;
  line-height:1;
  color:var(--accent);
  flex-shrink:0;
  transition:transform .25s ease;
}
.faq-item.is-open .faq-question::after{transform:rotate(45deg);}
.faq-answer{
  max-height:0;
  overflow:hidden;
  transition:max-height .3s ease;
  color:var(--muted);
  font-size:15px;
  line-height:1.9;
  padding:0 6px;
}
.faq-answer p{
  padding-bottom:24px;
  margin:0;
  color:var(--muted);
}
.faq-item.is-open .faq-answer{max-height:520px;}

/* CTA + Form */
.cta-band{
  background:var(--ink);
  color:#fff;
}
.cta-grid{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(300px,.9fr);
  gap:60px;
  align-items:center;
}
.cta-copy .eyebrow{color:rgba(255,255,255,.72);}
.cta-copy h2{color:#fff; margin-bottom:18px;}
.cta-copy p{color:rgba(255,255,255,.72); margin-bottom:24px;}
.contact-meta{list-style:none; margin:0; padding:0;}
.contact-meta li{
  display:flex;
  align-items:center;
  gap:12px;
  padding:9px 0;
  font-size:15px;
  color:rgba(255,255,255,.9);
}
.contact-meta i{color:var(--accent); width:18px; text-align:center;}
.contact-meta .url-text{font-family:var(--font-latin), var(--font-serif-cn); font-weight:600;}
.contact-form{
  background:var(--surface);
  padding:30px;
  border-radius:var(--radius);
  box-shadow:0 16px 40px rgba(0,0,0,.2);
}
.form-group{margin-bottom:18px;}
.form-label{
  display:block;
  font-size:12px;
  letter-spacing:.12em;
  font-weight:600;
  color:var(--muted);
  margin-bottom:8px;
  text-transform:uppercase;
}
.contact-form input,
.contact-form textarea{
  width:100%;
  border:1px solid var(--border);
  background:#fff;
  border-radius:var(--radius);
  padding:11px 14px;
  color:var(--ink);
  transition:border-color .2s ease, box-shadow .2s ease;
}
.contact-form input:focus,
.contact-form textarea:focus{
  outline:none;
  border-color:var(--brand);
  box-shadow:0 0 0 3px rgba(29,106,102,.12);
}
.contact-form textarea{min-height:110px; resize:vertical;}
.form-feedback{
  display:none;
  font-size:14px;
  color:var(--brand-deep);
  background:rgba(29,106,102,.08);
  border:1px solid rgba(29,106,102,.2);
  padding:11px 14px;
  border-radius:var(--radius);
  margin-top:14px;
}
.form-feedback.show{display:block;}

/* Footer */
.site-footer{background:var(--ink); color:rgba(255,255,255,.72);}
.footer-main{padding:64px 0 48px;}
.footer-grid{
  display:grid;
  grid-template-columns:1.3fr 1fr 1fr 1fr;
  gap:40px;
}
.footer-site-name{
  font-size:20px;
  font-weight:700;
  color:#fff;
  letter-spacing:-.01em;
  margin-bottom:12px;
}
.footer-brand-text{font-size:14px; color:rgba(255,255,255,.58); line-height:1.8;}
.footer-title{
  color:#fff;
  font-size:14px;
  font-weight:600;
  margin-bottom:18px;
  letter-spacing:.04em;
}
.footer-links,.footer-contact{
  list-style:none;
  margin:0;
  padding:0;
  font-size:14px;
}
.footer-links li{margin-bottom:10px;}
.footer-links a{color:rgba(255,255,255,.65); transition:color .2s ease;}
.footer-links a:hover{color:var(--accent);}
.footer-contact li{display:flex; align-items:flex-start; gap:10px; margin-bottom:12px; color:rgba(255,255,255,.68);}
.footer-contact i{color:var(--accent); margin-top:4px;}
.footer-contact span{font-family:var(--font-latin), var(--font-serif-cn);}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);
  padding:22px 0;
  font-size:12px;
  color:rgba(255,255,255,.52);
}
.footer-bottom .container{
  display:flex;
  justify-content:space-between;
  gap:12px;
  flex-wrap:wrap;
}

/* Responsive */
@media (max-width: 1023px){
  .section{padding:72px 0;}
  .site-header .container{padding:0 18px;}
  .nav-toggle{display:flex;}
  .main-nav{
    position:absolute;
    top:100%;
    left:0;
    right:0;
    background:#fff;
    border-bottom:1px solid var(--border);
    display:none;
    max-height:calc(100vh - 72px);
    overflow-y:auto;
  }
  .main-nav.nav-open{display:block;}
  .nav-links{
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:12px 0 20px;
  }
  .nav-links a{
    width:100%;
    padding:14px 22px;
    font-size:18px;
    border-bottom:1px solid var(--border);
    position:relative;
  }
  .nav-links a::after{left:22px; bottom:0; height:1px; right:auto; width:28px;}
  .nav-links a.is-active::after{transform:scaleX(1);}
  .split-block{grid-template-columns:1fr; gap:36px;}
  .guide-layout{grid-template-columns:1fr; gap:24px;}
  .side-panel{position:static;}
  .cta-grid{grid-template-columns:1fr; gap:38px;}
  .footer-grid{grid-template-columns:1fr 1fr; gap:32px;}
}
@media (max-width: 767px){
  .section{padding:48px 0;}
  .container{padding:0 18px;}
  h1{font-size:clamp(27px, 8vw, 38px);}
  .page-hero{padding:60px 0 48px;}
  .hero-actions .btn{width:100%;}
  .overview-copy .feature-columns{grid-template-columns:1fr;}
  .guide-item{grid-template-columns:1fr; gap:14px; padding:26px 0;}
  .guide-item .digit{margin-bottom:2px;}
  .scene-grid{grid-template-columns:1fr;}
  .process-grid{grid-template-columns:1fr;}
  .process-card{min-height:auto;}
  .stat-band{margin:48px 0;}
  .stat-band .inner{flex-wrap:wrap;}
  .stat-item{flex:0 0 50%; border:0; padding:10px 12px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom .container{flex-direction:column;}
  .faq-question{font-size:16px;padding:18px 2px;}
  .intro-card,.contact-form{padding:24px 20px;}
}
@media (max-width: 520px){
  .brand-logo-name{font-size:16px;}
  .header-inner{gap:12px;}
  .btn{padding:0 18px;}
  .cta-copy h2{font-size:26px;}
}

@media (prefers-reduced-motion: reduce){
  *,
  *::before,
  *::after{
    animation-duration:.001ms !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
}