/* roulang page: index */
:root {
            --bg: #F6F2E8;
            --bg-deep: #EFE8D9;
            --surface: #FFFCF6;
            --ink: #201C17;
            --muted: #6F6A61;
            --line: rgba(23, 20, 15, 0.14);
            --gold: #A77833;
            --gold-dark: #7E5820;
            --dark: #14110D;
            --dark-soft: #1D1914;
            --dark-text: #EADFC9;
            --radius: 10px;
            --btn-radius: 4px;
            --sidebar-w: 300px;
            --header-h: 64px;
            --serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", STSong, SimSun, serif;
            --sans: "Microsoft YaHei", "HarmonyOS Sans SC", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
            --shadow-soft: 0 18px 50px rgba(33, 25, 12, 0.08);
            --shadow-card: 0 10px 30px rgba(33, 25, 12, 0.06);
            --transition: all 0.3s ease;
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            background: var(--bg);
            color: var(--ink);
            font-family: var(--sans);
            font-size: 16px;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }

        p,
        h1,
        h2,
        h3,
        h4,
        ul,
        ol,
        figure,
        blockquote {
            margin: 0;
        }

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

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

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

        :focus-visible {
            outline: 3px solid rgba(167, 120, 51, 0.45);
            outline-offset: 2px;
        }

        h1,
        h2,
        h3,
        h4 {
            font-family: var(--serif);
            line-height: 1.28;
            color: var(--ink);
        }

        .container {
            max-width: 1200px;
        }

        .section {
            padding: 96px 0;
        }

        .section-head {
            margin-bottom: 52px;
            max-width: 820px;
        }

        .section-title {
            font-size: clamp(30px, 4vw, 44px);
            letter-spacing: 0.02em;
            margin-bottom: 12px;
        }

        .section-sub {
            color: var(--muted);
            font-size: 16px;
            max-width: 720px;
        }

        .kicker {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 13px;
            letter-spacing: 0.18em;
            color: var(--gold);
            margin-bottom: 18px;
        }

        .kicker::before {
            content: "";
            width: 28px;
            height: 1px;
            background: var(--gold);
            display: inline-block;
        }

        .text-gold {
            color: var(--gold);
        }

        .reveal {
            opacity: 0;
            transform: translateY(16px);
            transition: opacity 0.35s ease, transform 0.35s ease;
        }

        .reveal.is-visible {
            opacity: 1;
            transform: none;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border-radius: var(--btn-radius);
            font-weight: 600;
            padding: 0.9em 2em;
            font-size: 15px;
            line-height: 1.4;
            border: 1px solid transparent;
            transition: var(--transition);
            letter-spacing: 0.02em;
        }

        .btn-solid {
            background: var(--dark);
            border-color: var(--dark);
            color: #F6F2E8;
        }

        .btn-solid:hover,
        .btn-solid:focus {
            background: var(--gold);
            border-color: var(--gold);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 10px 26px rgba(167, 120, 51, 0.22);
        }

        .btn-outline {
            background: transparent;
            border-color: rgba(32, 28, 23, 0.55);
            color: var(--ink);
        }

        .btn-outline:hover,
        .btn-outline:focus {
            background: var(--dark);
            border-color: var(--dark);
            color: #F6F2E8;
            transform: translateY(-2px);
        }

        .btn-light-line {
            background: transparent;
            border-color: rgba(234, 223, 201, 0.55);
            color: #F6F2E8;
        }

        .btn-light-line:hover {
            background: var(--gold);
            border-color: var(--gold);
            color: #fff;
            transform: translateY(-2px);
        }

        .bg-ink {
            background: var(--dark);
        }

        .bg-ink .section-title,
        .bg-ink h2,
        .bg-ink h3 {
            color: var(--dark-text);
        }

        .bg-ink .section-sub {
            color: rgba(234, 223, 201, 0.66);
        }

        .site-sidebar {
            position: fixed;
            top: 0;
            bottom: 0;
            left: 0;
            width: var(--sidebar-w);
            background: var(--dark);
            color: var(--dark-text);
            z-index: 1030;
            display: flex;
            flex-direction: column;
            padding: 0 0 28px;
            border-right: 1px solid rgba(255, 255, 255, 0.04);
        }

        .sidebar-brand {
            display: flex;
            flex-direction: column;
            justify-content: center;
            min-height: 140px;
            padding: 30px 28px 24px;
            border-bottom: 1px solid rgba(234, 223, 201, 0.1);
        }

        .sidebar-brand .brand-line-one {
            font-family: var(--serif);
            font-size: 27px;
            letter-spacing: 0.14em;
            color: #F8F2E6;
            line-height: 1.3;
        }

        .sidebar-brand .brand-line-two {
            display: inline-block;
            margin-top: 6px;
            font-size: 13px;
            letter-spacing: 0.48em;
            color: var(--gold);
            text-indent: 0.28em;
        }

        .sidebar-brand small {
            display: block;
            margin-top: 14px;
            font-size: 12px;
            color: rgba(234, 223, 201, 0.46);
            letter-spacing: 0.06em;
        }

        .sidebar-nav {
            flex: 1;
            padding: 26px 18px;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .sidebar-nav .nav-label {
            font-size: 11px;
            letter-spacing: 0.2em;
            text-transform: uppercase;
            color: rgba(234, 223, 201, 0.4);
            padding: 0 16px 10px;
        }

        .nav-item {
            position: relative;
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 14px 16px;
            border-radius: 6px;
            color: rgba(234, 223, 201, 0.68);
            font-size: 15px;
            letter-spacing: 0.08em;
            transition: var(--transition);
        }

        .nav-item .nav-index {
            font-family: var(--serif);
            font-size: 12px;
            color: var(--gold);
            opacity: 0.7;
            min-width: 18px;
            transition: var(--transition);
        }

        .nav-item:hover {
            color: #F8F2E6;
            background: rgba(255, 255, 255, 0.045);
        }

        .nav-item:hover .nav-index {
            opacity: 1;
        }

        .nav-item.active {
            color: #F8F2E6;
            background: rgba(167, 120, 51, 0.12);
        }

        .nav-item.active::before {
            content: "";
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 2px;
            height: 20px;
            background: var(--gold);
            border-radius: 2px;
        }

        .nav-item.active .nav-index {
            color: #E4C187;
            opacity: 1;
        }

        .sidebar-foot {
            margin: 18px 18px 0;
            padding: 18px 16px;
            border-top: 1px solid rgba(234, 223, 201, 0.08);
            color: rgba(234, 223, 201, 0.4);
            font-size: 12px;
            line-height: 1.7;
        }

        .sidebar-foot i {
            color: var(--gold);
            margin-right: 6px;
        }

        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-h);
            background: var(--dark);
            color: #F8F2E6;
            z-index: 1050;
            align-items: center;
            justify-content: space-between;
            padding: 0 20px;
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.22);
        }

        .mobile-brand {
            font-family: var(--serif);
            font-size: 20px;
            letter-spacing: 0.12em;
            color: #F8F2E6;
        }

        .mobile-burger {
            width: 44px;
            height: 44px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: transparent;
            border: 1px solid rgba(234, 223, 201, 0.25);
            border-radius: 6px;
            color: #F8F2E6;
            font-size: 22px;
            line-height: 1;
            padding: 0;
        }

        .mobile-burger:hover {
            background: rgba(255, 255, 255, 0.06);
            color: var(--gold);
            border-color: var(--gold);
        }

        .mobile-menu {
            background: var(--dark);
            color: var(--dark-text);
            padding: 10px 20px 30px;
        }

        .mobile-menu.collapse:not(.show) {
            display: none;
        }

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

        .mobile-menu .nav-item {
            border-bottom: 1px solid rgba(234, 223, 201, 0.1);
            border-radius: 0;
            font-size: 17px;
            padding: 16px 4px;
            justify-content: flex-start;
        }

        .mobile-menu .nav-item.active::before {
            left: -8px;
        }

        .main-area {
            margin-left: var(--sidebar-w);
            background: var(--bg);
            overflow: hidden;
        }

        .hero {
            background:
                radial-gradient(circle at 78% 28%, rgba(167, 120, 51, 0.12), transparent 36%),
                linear-gradient(180deg, #F0E9DC 0%, var(--bg) 100%);
            padding: 96px 0 72px;
            min-height: 92vh;
            display: flex;
            align-items: center;
            border-bottom: 1px solid rgba(23, 20, 15, 0.07);
        }

        .hero-inner {
            width: 100%;
        }

        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 7px 14px;
            border: 1px solid rgba(167, 120, 51, 0.35);
            border-radius: 40px;
            font-size: 13px;
            letter-spacing: 0.08em;
            color: var(--gold-dark);
            background: rgba(255, 252, 246, 0.65);
            margin-bottom: 28px;
        }

        .hero-tag::before {
            content: "";
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--gold);
        }

        .hero h1 {
            font-size: clamp(40px, 6.4vw, 78px);
            line-height: 1.15;
            letter-spacing: 0.02em;
            color: var(--ink);
            margin-bottom: 24px;
            font-weight: 600;
        }

        .hero-lead {
            font-size: clamp(16px, 1.6vw, 19px);
            color: var(--muted);
            max-width: 540px;
            margin-bottom: 38px;
            line-height: 1.8;
        }

        .hero-buttons {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 48px;
        }

        .hero-signals {
            display: flex;
            flex-wrap: wrap;
            gap: 18px 34px;
            list-style: none;
            padding: 0;
            margin: 0;
            color: var(--muted);
            font-size: 14px;
        }

        .hero-signals li {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .hero-signals i {
            color: var(--gold);
        }

        .hero-visual {
            position: relative;
            margin-left: auto;
            max-width: 560px;
        }

        .hero-visual::before {
            content: "";
            position: absolute;
            inset: 20px -20px -20px 20px;
            border: 1px solid rgba(167, 120, 51, 0.25);
            border-radius: 14px;
            pointer-events: none;
        }

        .hero-visual img {
            position: relative;
            z-index: 1;
            width: 100%;
            aspect-ratio: 4 / 3;
            object-fit: cover;
            border-radius: 12px;
            box-shadow: 0 26px 70px rgba(32, 24, 12, 0.22);
        }

        .hero-visual .visual-caption {
            position: absolute;
            z-index: 2;
            left: -14px;
            bottom: 26px;
            background: var(--dark);
            color: var(--dark-text);
            padding: 14px 20px;
            border-radius: 6px;
            font-size: 13px;
            letter-spacing: 0.05em;
            box-shadow: var(--shadow-card);
        }

        .hero-visual .visual-caption span {
            color: var(--gold);
        }

        .service-overview {
            padding: 96px 0 88px;
        }

        .service-rows {
            border-top: 1px solid var(--line);
        }

        .service-row {
            display: grid;
            grid-template-columns: 90px 1fr auto;
            align-items: center;
            gap: 32px;
            padding: 30px 10px;
            border-bottom: 1px solid var(--line);
            transition: background 0.25s ease, transform 0.25s ease;
        }

        .service-row:hover {
            background: rgba(255, 252, 246, 0.7);
        }

        .service-row:hover .service-title {
            transform: translateX(4px);
        }

        .service-number {
            font-family: var(--serif);
            font-size: 32px;
            color: var(--gold);
            letter-spacing: 0.08em;
        }

        .service-content {
            display: flex;
            flex-direction: column;
            gap: 6px;
            max-width: 720px;
        }

        .service-title {
            font-size: 22px;
            font-weight: 600;
            font-family: var(--serif);
            transition: transform 0.25s ease;
        }

        .service-desc {
            color: var(--muted);
            font-size: 15px;
        }

        .service-more {
            width: 46px;
            height: 46px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border: 1px solid var(--line);
            border-radius: 50%;
            color: var(--gold);
            transition: var(--transition);
        }

        .service-row:hover .service-more {
            background: var(--gold);
            color: #fff;
            border-color: var(--gold);
        }

        .metric-band {
            background: var(--dark);
            color: var(--dark-text);
            padding: 72px 0;
            position: relative;
            overflow: hidden;
        }

        .metric-band::after {
            content: "";
            position: absolute;
            right: -120px;
            top: -160px;
            width: 420px;
            height: 420px;
            background: radial-gradient(circle, rgba(167, 120, 51, 0.18), transparent 68%);
            pointer-events: none;
        }

        .metric-band .container {
            position: relative;
            z-index: 2;
        }

        .metric-head {
            margin-bottom: 52px;
            max-width: 620px;
        }

        .metric-head .kicker {
            color: #C9A564;
        }

        .metric-head h2 {
            color: #F8F2E6;
            margin-bottom: 12px;
        }

        .metric-head p {
            color: rgba(234, 223, 201, 0.62);
        }

        .metric-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 48px 32px;
        }

        .metric-item {
            border-left: 1px solid rgba(234, 223, 201, 0.16);
            padding-left: 24px;
        }

        .metric-number {
            font-family: var(--serif);
            font-size: clamp(48px, 6vw, 82px);
            line-height: 1;
            color: #C9A564;
            letter-spacing: 0.02em;
            display: block;
            margin-bottom: 14px;
        }

        .metric-label {
            color: rgba(234, 223, 201, 0.72);
            font-size: 15px;
        }

        .metric-desc {
            margin-top: 6px;
            color: rgba(234, 223, 201, 0.44);
            font-size: 13px;
        }

        .featured-section {
            background: var(--surface);
            border-top: 1px solid rgba(23, 20, 15, 0.06);
            border-bottom: 1px solid rgba(23, 20, 15, 0.06);
        }

        .featured-grid {
            display: grid;
            grid-template-columns: 1.2fr 1fr;
            gap: 28px;
            align-items: stretch;
        }

        .feature-card {
            position: relative;
            border-radius: var(--radius);
            overflow: hidden;
            background: var(--dark);
            min-height: 300px;
            display: flex;
            align-items: flex-end;
            box-shadow: var(--shadow-soft);
            transition: var(--transition);
        }

        .feature-card:hover {
            box-shadow: 0 22px 60px rgba(32, 24, 12, 0.2);
            transform: translateY(-4px);
        }

        .feature-card img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: 0.78;
            transition: transform 0.4s ease;
        }

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

        .feature-card .card-mask {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(20, 17, 13, 0) 0%, rgba(20, 17, 13, 0.72) 82%);
        }

        .feature-body {
            position: relative;
            z-index: 2;
            padding: 28px;
            color: #F8F2E6;
        }

        .feature-body .tag {
            display: inline-block;
            font-size: 12px;
            letter-spacing: 0.18em;
            color: #E7C890;
            border: 1px solid rgba(231, 200, 144, 0.4);
            border-radius: 30px;
            padding: 4px 12px;
            margin-bottom: 12px;
        }

        .feature-body h3 {
            font-size: 24px;
            color: #F8F2E6;
            margin-bottom: 8px;
        }

        .feature-body p {
            color: rgba(255, 252, 246, 0.72);
            font-size: 14px;
            line-height: 1.7;
        }

        .feature-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: 16px;
            color: #E7C890;
            font-size: 14px;
            font-weight: 600;
        }

        .feature-link:hover {
            color: #fff;
        }

        .feature-small-list {
            display: flex;
            flex-direction: column;
            gap: 28px;
        }

        .feature-small-card {
            display: grid;
            grid-template-columns: 130px 1fr;
            gap: 20px;
            align-items: center;
            background: var(--bg);
            border: 1px solid rgba(23, 20, 15, 0.08);
            border-radius: var(--radius);
            padding: 10px;
            min-height: 190px;
            transition: var(--transition);
        }

        .feature-small-card:hover {
            border-color: rgba(167, 120, 51, 0.35);
            background: #FFFDF7;
            box-shadow: var(--shadow-card);
        }

        .feature-small-card img {
            width: 100%;
            height: 170px;
            object-fit: cover;
            border-radius: 8px;
        }

        .feature-small-body .mini-tag {
            font-size: 11px;
            color: var(--gold-dark);
            letter-spacing: 0.16em;
        }

        .feature-small-body h3 {
            font-size: 18px;
            margin: 8px 0;
            color: var(--ink);
        }

        .feature-small-body p {
            font-size: 13px;
            color: var(--muted);
            line-height: 1.65;
        }

        .steps-section {
            padding: 96px 0;
        }

        .steps-wrap {
            margin-top: 52px;
            position: relative;
            max-width: 860px;
        }

        .steps-wrap::before {
            content: "";
            position: absolute;
            width: 1px;
            top: 10px;
            bottom: 10px;
            left: 27px;
            background: rgba(167, 120, 51, 0.4);
        }

        .step-item {
            display: flex;
            gap: 34px;
            padding: 18px 0 34px;
            position: relative;
        }

        .step-dot {
            position: relative;
            z-index: 2;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--bg);
            border: 1px solid var(--gold);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-family: var(--serif);
            font-size: 18px;
            color: var(--gold);
            flex: 0 0 auto;
            box-shadow: 0 0 0 6px var(--bg);
        }

        .step-content {
            padding-top: 4px;
        }

        .step-index {
            font-size: 11px;
            letter-spacing: 0.2em;
            color: var(--gold);
            margin-bottom: 6px;
        }

        .step-content h3 {
            font-size: 22px;
            margin-bottom: 8px;
        }

        .step-content p {
            color: var(--muted);
            max-width: 620px;
        }

        .news-section {
            background: var(--surface);
            border-top: 1px solid rgba(23, 20, 15, 0.06);
        }

        .news-row {
            display: grid;
            grid-template-columns: 150px 1fr 180px 48px;
            gap: 24px;
            align-items: center;
            padding: 24px 0;
            border-bottom: 1px solid var(--line);
            transition: background 0.2s ease;
        }

        .news-row:hover {
            background: rgba(246, 242, 232, 0.55);
        }

        .news-cat {
            display: inline-flex;
            align-self: start;
            font-size: 12px;
            color: var(--gold-dark);
            background: rgba(167, 120, 51, 0.1);
            border-radius: 30px;
            padding: 4px 13px;
            letter-spacing: 0.08em;
            white-space: nowrap;
            width: fit-content;
        }

        .news-title {
            font-family: var(--serif);
            font-size: 20px;
            font-weight: 600;
            line-height: 1.45;
            margin-bottom: 4px;
            transition: color 0.2s ease;
        }

        .news-row:hover .news-title {
            color: var(--gold-dark);
        }

        .news-title a:hover {
            color: var(--gold-dark);
        }

        .news-summary {
            color: var(--muted);
            font-size: 14px;
            line-height: 1.65;
            display: -webkit-box;
            -webkit-line-clamp: 1;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-date {
            color: var(--muted);
            font-size: 14px;
            text-align: right;
            white-space: nowrap;
        }

        .news-arrow {
            width: 42px;
            height: 42px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border: 1px solid var(--line);
            border-radius: 50%;
            color: var(--gold);
            transition: var(--transition);
        }

        .news-arrow:hover {
            background: var(--gold);
            color: #fff;
            border-color: var(--gold);
        }

        .news-empty {
            border: 1.5px dashed rgba(167, 120, 51, 0.45);
            border-radius: var(--radius);
            background: var(--bg);
            color: var(--muted);
            text-align: center;
            padding: 44px 20px;
            margin-top: 20px;
            font-size: 15px;
        }

        .faq-section {
            background: var(--bg);
        }

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

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

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

        .faq-accordion .accordion-button {
            background: transparent;
            box-shadow: none;
            border-radius: 0;
            padding: 24px 56px 24px 12px;
            font-size: 18px;
            font-weight: 600;
            color: var(--ink);
            font-family: var(--serif);
            position: relative;
            line-height: 1.4;
            transition: color 0.25s ease;
        }

        .faq-accordion .accordion-button::after {
            background-image: none;
            font-family: "bootstrap-icons";
            content: "\F64D";
            font-size: 22px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            border: 1px solid var(--line);
            border-radius: 50%;
            color: var(--gold);
            transition: transform 0.3s ease, background 0.3s ease;
        }

        .faq-accordion .accordion-button:not(.collapsed)::after {
            background-image: none;
            content: "\F2EA";
            color: #fff;
            background: var(--gold);
            border-color: var(--gold);
        }

        .faq-accordion .accordion-button:not(.collapsed) {
            color: var(--gold-dark);
            background: transparent;
            box-shadow: none;
        }

        .faq-accordion .accordion-button:focus {
            box-shadow: none;
            border-color: transparent;
        }

        .faq-accordion .accordion-body {
            padding: 4px 12px 30px 56px;
            color: var(--muted);
            font-size: 15px;
            line-height: 1.8;
            max-width: 740px;
        }

        .q-number {
            color: var(--gold);
            font-size: 15px;
            font-weight: 700;
            margin-right: 14px;
            font-family: var(--serif);
        }

        .cta-band {
            background: var(--dark);
            color: var(--dark-text);
            padding: 76px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-band::before {
            content: "";
            position: absolute;
            left: 32%;
            top: -180px;
            width: 460px;
            height: 460px;
            background: radial-gradient(circle, rgba(167, 120, 51, 0.16), transparent 66%);
        }

        .cta-inner {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 700px;
            margin: 0 auto;
        }

        .cta-inner h2 {
            color: #F8F2E6;
            font-size: clamp(28px, 4vw, 42px);
            margin-bottom: 16px;
        }

        .cta-inner p {
            color: rgba(234, 223, 201, 0.68);
            font-size: 15px;
            line-height: 1.8;
            margin-bottom: 32px;
        }

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

        .contact-section {
            background: var(--surface);
            padding: 96px 0;
        }

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

        .contact-info-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 10px 0;
            color: var(--muted);
            font-size: 15px;
        }

        .contact-info-list li i {
            color: var(--gold);
            margin-top: 6px;
        }

        .contact-panel {
            background: var(--bg);
            border: 1px solid rgba(23, 20, 15, 0.1);
            border-radius: var(--radius);
            padding: 36px;
            box-shadow: var(--shadow-card);
        }

        .form-control {
            background: #FFFDF8;
            border: 1px solid rgba(23, 20, 15, 0.14);
            border-radius: var(--btn-radius);
            color: var(--ink);
            min-height: 50px;
            padding: 0.8em 1em;
            font-size: 15px;
        }

        .form-control::placeholder {
            color: rgba(111, 106, 97, 0.7);
        }

        .form-control:focus {
            background: #fff;
            border-color: var(--gold);
            box-shadow: 0 0 0 4px rgba(167, 120, 51, 0.1);
        }

        textarea.form-control {
            min-height: 140px;
            resize: vertical;
        }

        .site-footer {
            background: var(--dark);
            color: rgba(234, 223, 201, 0.6);
            margin-left: var(--sidebar-w);
            font-size: 14px;
            line-height: 1.8;
        }

        .footer-main {
            padding: 58px 0 34px;
        }

        .footer-brand .brand-name {
            font-family: var(--serif);
            font-size: 24px;
            color: #F8F2E6;
            letter-spacing: 0.12em;
            display: block;
            margin-bottom: 10px;
        }

        .footer-brand p {
            color: rgba(234, 223, 201, 0.5);
            max-width: 360px;
            font-size: 13px;
        }

        .footer-title {
            font-size: 15px;
            color: #F8F2E6;
            letter-spacing: 0.12em;
            margin-bottom: 16px;
        }

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

        .footer-links li {
            padding: 4px 0;
        }

        .footer-links li a {
            color: rgba(234, 223, 201, 0.6);
            font-size: 14px;
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(234, 223, 201, 0.08);
            padding: 22px 0;
        }

        .footer-bottom .row {
            align-items: center;
        }

        .footer-bottom p {
            color: rgba(234, 223, 201, 0.36);
            font-size: 13px;
            margin: 0;
        }

        @media (max-width: 1199px) {
            .feature-card {
                min-height: 280px;
            }

            .feature-small-card {
                grid-template-columns: 110px 1fr;
                min-height: 170px;
            }

            .feature-small-card img {
                height: 150px;
            }

            .news-row {
                grid-template-columns: 120px 1fr 150px 42px;
                gap: 18px;
            }
        }

        @media (max-width: 991px) {
            .site-sidebar {
                display: none;
            }

            .mobile-header {
                display: flex;
            }

            .main-area,
            .site-footer {
                margin-left: 0;
            }

            .hero {
                padding: 110px 0 64px;
                min-height: auto;
            }

            .hero h1 {
                font-size: clamp(34px, 8vw, 58px);
            }

            .hero-visual {
                max-width: 100%;
                margin-left: 0;
            }

            .hero-visual::before {
                inset: 14px -10px -10px 10px;
            }

            .content-wrap {
                margin-top: var(--header-h);
            }

            .metric-row {
                grid-template-columns: repeat(2, 1fr);
                gap: 40px 24px;
            }

            .metric-item {
                padding-left: 20px;
            }

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

            .feature-small-list {
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }

            .news-row {
                grid-template-columns: 120px 1fr 140px 40px;
            }

            .contact-panel {
                padding: 26px;
            }
        }

        @media (max-width: 767px) {
            .section {
                padding: 68px 0;
            }

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

            .service-row {
                grid-template-columns: 60px 1fr auto;
                gap: 16px;
                padding: 24px 0;
            }

            .service-number {
                font-size: 26px;
            }

            .service-title {
                font-size: 19px;
            }

            .service-desc {
                font-size: 14px;
            }

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

            .feature-small-card {
                grid-template-columns: 112px 1fr;
                min-height: 150px;
            }

            .feature-small-card img {
                height: 130px;
            }

            .news-row {
                grid-template-columns: 1fr auto;
                gap: 12px 16px;
                padding: 20px 0;
            }

            .news-cat {
                grid-column: 1 / -1;
            }

            .news-date {
                text-align: left;
                font-size: 13px;
            }

            .news-arrow {
                grid-column: 1 / -1;
                width: 40px;
                height: 40px;
            }

            .news-title {
                font-size: 18px;
            }

            .news-summary {
                grid-column: 1 / -1;
                -webkit-line-clamp: 2;
            }

            .faq-accordion .accordion-button {
                font-size: 16px;
                padding-left: 6px;
                padding-right: 48px;
            }

            .faq-accordion .accordion-body {
                padding-left: 6px;
                padding-right: 10px;
                font-size: 14px;
            }

            .cta-band {
                padding: 56px 0;
            }

            .contact-panel {
                padding: 22px;
            }
        }

        @media (max-width: 520px) {
            .hero {
                padding-top: 100px;
            }

            .hero h1 {
                font-size: 34px;
            }

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

            .hero-signals {
                gap: 14px 20px;
                font-size: 13px;
            }

            .hero-signals li {
                width: calc(50% - 10px);
            }

            .hero-visual .visual-caption {
                left: 8px;
                bottom: 14px;
                font-size: 12px;
                padding: 10px 14px;
            }

            .service-row {
                grid-template-columns: 1fr;
                gap: 6px;
                padding: 24px 0 20px;
            }

            .service-more {
                display: none;
            }

            .metric-row {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .metric-item {
                border-left: 0;
                padding-left: 0;
                border-top: 1px solid rgba(234, 223, 201, 0.1);
                padding-top: 18px;
            }

            .feature-card {
                min-height: 280px;
            }

            .feature-body {
                padding: 20px;
            }

            .feature-small-card {
                grid-template-columns: 1fr;
                padding: 10px;
            }

            .feature-small-card img {
                height: 180px;
            }

            .steps-wrap::before {
                left: 22px;
            }

            .step-item {
                gap: 18px;
                padding-bottom: 28px;
            }

            .step-dot {
                width: 44px;
                height: 44px;
                font-size: 15px;
                flex-basis: 44px;
            }

            .step-index {
                font-size: 10px;
            }

            .step-content h3 {
                font-size: 19px;
            }

            .footer-main {
                padding-top: 44px;
            }
        }

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

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

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

/* roulang page: article */
:root {
            --bg: #f6f2e8;
            --surface: #fffcf6;
            --ink: #201c17;
            --muted: #6f6a61;
            --line: rgba(23, 20, 15, 0.14);
            --gold: #a77833;
            --gold-dark: #7e5820;
            --gold-light: #d3b17c;
            --dark: #14110d;
            --dark-soft: #211c15;
            --cream: #eadfc9;
            --crumb: #8a8276;
            --radius-lg: 10px;
            --radius-md: 7px;
            --radius-sm: 4px;
            --shadow-sm: 0 2px 10px rgba(23, 20, 15, 0.06);
            --shadow-md: 0 24px 60px rgba(23, 20, 15, 0.14);
            --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", "SimSun", serif;
            --font-body: "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: var(--font-body);
            font-size: 16px;
            line-height: 1.75;
            color: var(--ink);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.25s ease, background 0.25s ease, border-color 0.25s ease, transform 0.25s ease;
        }

        button {
            font-family: inherit;
        }

        .page-wrap {
            min-height: 100vh;
            background: var(--bg);
        }

        .sidebar-panel {
            position: fixed;
            top: 0;
            left: 0;
            width: 300px;
            height: 100vh;
            background: var(--dark);
            color: var(--cream);
            z-index: 1040;
            display: flex;
            flex-direction: column;
            overflow-y: auto;
        }

        .sidebar-inner {
            display: flex;
            flex-direction: column;
            height: 100%;
            padding: 36px 34px 30px;
        }

        .sidebar-brand {
            display: flex;
            flex-direction: column;
            gap: 12px;
            padding: 18px 0 26px;
            border-bottom: 1px solid rgba(234, 223, 201, 0.14);
            margin-bottom: 34px;
        }

        .brand-cn {
            font-family: var(--font-serif);
            font-size: 27px;
            font-weight: 700;
            letter-spacing: 4px;
            color: #fff;
            line-height: 1.2;
            display: block;
        }

        .brand-sub {
            font-size: 14px;
            letter-spacing: 3px;
            color: var(--gold-light);
            font-weight: 400;
        }

        .nav-label {
            display: block;
            font-size: 12px;
            color: rgba(234, 223, 201, 0.5);
            letter-spacing: 3px;
            margin-bottom: 18px;
            text-transform: uppercase;
        }

        .sidebar-nav {
            display: flex;
            flex-direction: column;
        }

        .sidebar-nav .nav-item {
            position: relative;
            display: flex;
            align-items: center;
            gap: 18px;
            padding: 18px 10px 18px 22px;
            color: rgba(234, 223, 201, 0.68);
            font-size: 16px;
            border-left: 2px solid transparent;
            transition: background 0.25s ease, color 0.25s ease, transform 0.25s ease;
        }

        .sidebar-nav .nav-item::before {
            content: "";
            position: absolute;
            left: 0;
            top: 0;
            width: 2px;
            height: 100%;
            background: var(--gold);
            transform: scaleY(0);
            transform-origin: center;
            transition: transform 0.3s ease;
        }

        .sidebar-nav .nav-item:hover {
            background: rgba(234, 223, 201, 0.04);
            color: #f2e4c9;
        }

        .sidebar-nav .nav-item.active {
            color: #f6ead2;
        }

        .sidebar-nav .nav-item.active::before {
            transform: scaleY(1);
        }

        .nav-index {
            font-size: 12px;
            color: rgba(234, 223, 201, 0.45);
            letter-spacing: 1px;
            font-variant-numeric: tabular-nums;
        }

        .sidebar-nav .nav-item.active .nav-index {
            color: var(--gold-light);
        }

        .nav-text {
            font-weight: 500;
        }

        .sidebar-foot {
            margin-top: auto;
            padding-top: 30px;
            border-top: 1px solid rgba(234, 223, 201, 0.12);
        }

        .sidebar-foot span {
            display: block;
            font-family: var(--font-serif);
            font-size: 14px;
            color: rgba(234, 223, 201, 0.8);
            letter-spacing: 1px;
            margin-bottom: 6px;
        }

        .sidebar-foot small {
            color: rgba(234, 223, 201, 0.42);
            font-size: 12px;
            letter-spacing: 1px;
        }

        .content-wrap {
            margin-left: 300px;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        .mobile-bar {
            display: none;
        }

        article,
        aside,
        footer,
        header,
        main,
        nav,
        section {
            display: block;
        }

        .article-main {
            flex: 1;
            width: 100%;
            padding: 56px 46px 80px;
        }

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

        .breadcrumb-wrap {
            margin-bottom: 28px;
        }

        .crumb-list {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
            padding: 0;
            margin: 0;
            font-size: 14px;
            color: var(--crumb);
        }

        .crumb-list a {
            color: var(--muted);
            text-decoration: none;
        }

        .crumb-list a:hover {
            color: var(--gold-dark);
        }

        .crumb-sep {
            color: rgba(23, 20, 15, 0.26);
        }

        .crumb-current {
            color: var(--ink);
            max-width: 280px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .article-head {
            padding: 24px 0 20px;
            border-bottom: 1px solid var(--line);
            margin-bottom: 0;
        }

        .article-kicker {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 13px;
            letter-spacing: 2px;
            color: var(--gold-dark);
            margin-bottom: 20px;
            text-transform: uppercase;
        }

        .article-kicker::before {
            content: "";
            width: 28px;
            height: 2px;
            background: var(--gold);
        }

        .article-head h1 {
            font-family: var(--font-serif);
            font-size: clamp(31px, 4vw, 47px);
            font-weight: 700;
            line-height: 1.36;
            color: var(--ink);
            margin: 0 0 24px;
            letter-spacing: 0.02em;
        }

        .article-meta {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 12px 26px;
            padding: 0;
            margin: 0;
            color: var(--muted);
            font-size: 14px;
        }

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

        .article-meta i {
            color: var(--gold);
            font-size: 13px;
        }

        .article-cover {
            margin: 34px 0 10px;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            background: var(--surface);
        }

        .article-cover img {
            width: 100%;
            height: auto;
            aspect-ratio: 21 / 9;
            object-fit: cover;
        }

        .article-lead {
            position: relative;
            margin: 34px 0 26px;
            padding: 26px 30px 26px 32px;
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            color: #4d4740;
            font-size: 17px;
            line-height: 1.9;
            box-shadow: var(--shadow-sm);
        }

        .article-lead::before {
            content: "";
            position: absolute;
            left: 0;
            top: 18px;
            bottom: 18px;
            width: 4px;
            border-radius: 0 2px 2px 0;
            background: var(--gold);
        }

        .article-content {
            max-width: 100%;
            color: #312c26;
            font-size: 16.5px;
            line-height: 1.9;
            word-break: break-word;
        }

        .article-content p {
            margin: 0 0 1.75em;
        }

        .article-content h2,
        .article-content h3,
        .article-content h4 {
            font-family: var(--font-serif);
            color: var(--ink);
            line-height: 1.5;
            margin: 2.1em 0 0.8em;
        }

        .article-content h2 {
            font-size: 27px;
            font-weight: 700;
            padding-bottom: 0.35em;
            border-bottom: 1px solid rgba(167, 120, 51, 0.25);
        }

        .article-content h3 {
            font-size: 21px;
            font-weight: 600;
        }

        .article-content h4 {
            font-size: 17px;
            font-weight: 600;
        }

        .article-content a {
            color: var(--ink);
            text-decoration: underline;
            text-decoration-color: rgba(23, 20, 15, 0.3);
            text-underline-offset: 4px;
            transition: color 0.2s, text-decoration-color 0.2s;
        }

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

        .article-content strong {
            color: #1d1813;
        }

        .article-content ul,
        .article-content ol {
            padding-left: 1.4em;
            margin: 0 0 1.8em;
        }

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

        .article-content blockquote {
            margin: 0 0 1.8em;
            padding: 8px 0 6px 26px;
            border-left: 4px solid var(--gold);
            background: rgba(167, 120, 51, 0.06);
            color: #575047;
        }

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

        .article-content img {
            max-width: 100%;
            height: auto;
            border-radius: var(--radius-md);
            margin: 1.4em 0;
        }

        .article-content figure {
            margin: 1.6em 0;
        }

        .article-content figcaption {
            font-size: 13px;
            color: var(--muted);
            text-align: center;
            margin-top: 8px;
            line-height: 1.6;
        }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 0 0 1.8em;
            font-size: 15px;
        }

        .article-content th,
        .article-content td {
            border: 1px solid rgba(23, 20, 15, 0.12);
            padding: 12px 14px;
            text-align: left;
            background: var(--surface);
        }

        .article-content th {
            background: var(--dark);
            color: var(--cream);
            font-weight: 600;
        }

        .article-content code {
            font-family: "SFMono-Regular", Consolas, monospace;
            font-size: 0.9em;
            background: rgba(23, 20, 15, 0.07);
            padding: 2px 5px;
            border-radius: 4px;
        }

        .article-subindex {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            padding: 20px 24px;
            box-shadow: var(--shadow-sm);
            margin: 44px 0 0;
        }

        .subindex-heading {
            font-family: var(--font-serif);
            font-size: 19px;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }

        .subindex-heading i {
            color: var(--gold);
        }

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

        .subindex-list li {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 14px;
            padding: 14px 0;
            border-bottom: 1px solid rgba(23, 20, 15, 0.08);
            transition: padding-left 0.25s ease;
        }

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

        .subindex-list .si-count {
            font-size: 12px;
            font-variant-numeric: tabular-nums;
            color: var(--gold-dark);
            letter-spacing: 1px;
        }

        .subindex-list .si-name {
            color: var(--ink);
            font-size: 16px;
            font-weight: 500;
        }

        .subindex-list .si-desc {
            color: var(--muted);
            font-size: 13px;
            margin-top: 4px;
        }

        .subindex-list li:hover {
            padding-left: 6px;
        }

        .subindex-list li:hover .si-name {
            color: var(--gold-dark);
        }

        .not-found-card {
            background: var(--surface);
            border: 1px dashed rgba(23, 20, 15, 0.25);
            border-radius: var(--radius-lg);
            padding: 66px 30px;
            text-align: center;
            color: var(--muted);
            margin: 40px 0;
        }

        .not-found-card .nf-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 68px;
            height: 68px;
            border-radius: 50%;
            background: rgba(167, 120, 51, 0.08);
            border: 1px solid rgba(167, 120, 51, 0.22);
            color: var(--gold);
            font-size: 26px;
            margin-bottom: 20px;
        }

        .not-found-card p {
            font-size: 19px;
            color: var(--ink);
            margin-bottom: 22px;
        }

        .site-footer {
            background: var(--dark);
            color: rgba(234, 223, 201, 0.72);
            padding: 66px 46px 30px;
        }

        .site-footer .footer-main {
            max-width: 1200px;
            margin: 0 auto;
            padding-bottom: 46px;
            border-bottom: 1px solid rgba(234, 223, 201, 0.12);
        }

        .site-footer .brand-name {
            font-family: var(--font-serif);
            font-size: 26px;
            font-weight: 700;
            color: #f0e3cb;
            margin-bottom: 14px;
            display: block;
            letter-spacing: 1px;
        }

        .site-footer p {
            font-size: 14px;
            line-height: 1.9;
            color: rgba(234, 223, 201, 0.58);
            margin: 0;
            max-width: 480px;
        }

        .footer-title {
            font-family: var(--font-serif);
            color: #f0e3cb;
            font-size: 17px;
            margin: 0 0 20px;
            letter-spacing: 1px;
        }

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

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

        .footer-links a {
            color: rgba(234, 223, 201, 0.62);
            font-size: 14px;
            text-decoration: none;
            transition: color 0.25s ease, padding-left 0.25s ease;
        }

        .footer-links a:hover {
            color: var(--gold-light);
            padding-left: 5px;
        }

        .site-footer .footer-bottom {
            max-width: 1200px;
            margin: 0 auto;
            padding-top: 28px;
            font-size: 13px;
            color: rgba(234, 223, 201, 0.4);
        }

        .site-footer .footer-bottom p {
            margin: 0;
        }

        .btn-solid {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            height: 48px;
            padding: 0 28px;
            border-radius: var(--radius-sm);
            background: var(--dark);
            color: #f2e8da;
            font-weight: 500;
            border: 1px solid var(--dark);
            transition: background 0.25s ease, color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
        }

        .btn-solid:hover {
            background: var(--gold);
            border-color: var(--gold);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 10px 24px rgba(23, 20, 15, 0.12);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            height: 48px;
            padding: 0 28px;
            border-radius: var(--radius-sm);
            background: transparent;
            color: var(--ink);
            border: 1px solid rgba(23, 20, 15, 0.4);
            font-weight: 500;
            transition: background 0.25s ease, color 0.25s ease, border-color 0.25s ease, transform 0.25s ease;
        }

        .btn-outline:hover {
            background: var(--dark);
            color: var(--cream);
            border-color: var(--dark);
            transform: translateY(-2px);
        }

        .btn-gold {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 46px;
            padding: 0 24px;
            border-radius: var(--radius-sm);
            background: var(--gold);
            color: #fffaf1;
            font-weight: 500;
            border: 1px solid var(--gold);
            transition: background 0.25s, border-color 0.25s, transform 0.25s;
        }

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

        @media (max-width: 991.98px) {
            .sidebar-panel {
                display: none;
            }

            .mobile-bar {
                display: flex;
                position: fixed;
                top: 0;
                left: 0;
                right: 0;
                height: 64px;
                background: var(--dark);
                z-index: 1050;
                align-items: center;
                justify-content: space-between;
                padding: 0 22px;
                box-shadow: 0 4px 20px rgba(0, 0, 0, 0.18);
            }

            .mobile-bar .mobile-brand {
                font-family: var(--font-serif);
                font-size: 19px;
                color: #f0e3cb;
                letter-spacing: 1px;
                white-space: nowrap;
                font-weight: 600;
            }

            .menu-toggle {
                width: 42px;
                height: 42px;
                border: 1px solid rgba(234, 223, 201, 0.22);
                background: transparent;
                color: var(--cream);
                border-radius: 6px;
                display: inline-flex;
                align-items: center;
                justify-content: center;
                font-size: 18px;
                transition: border-color 0.25s, background 0.25s;
            }

            .menu-toggle:hover {
                border-color: var(--gold-light);
                background: rgba(234, 223, 201, 0.06);
            }

            .mobile-dropdown {
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                bottom: 0;
                background: var(--dark);
                z-index: 1049;
                padding: 32px 28px 40px;
                transform: translateY(-104%);
                transition: transform 0.35s ease;
                overflow-y: auto;
            }

            body.menu-open .mobile-dropdown {
                transform: translateY(0);
            }

            .mobile-dropdown .sidebar-nav-ext {
                display: flex;
                flex-direction: column;
                border-top: 1px solid rgba(234, 223, 201, 0.12);
            }

            .mobile-dropdown .nav-ext-item {
                display: flex;
                align-items: center;
                gap: 18px;
                padding: 19px 4px;
                border-bottom: 1px solid rgba(234, 223, 201, 0.12);
                color: rgba(234, 223, 201, 0.72);
                font-family: var(--font-serif);
                font-size: 22px;
            }

            .mobile-dropdown .nav-ext-item:hover {
                color: var(--gold-light);
            }

            .mobile-dropdown .nav-ext-item .ext-index {
                font-family: var(--font-body);
                font-size: 13px;
                color: rgba(234, 223, 201, 0.4);
            }

            .mobile-dropdown .nav-ext-item.active {
                color: var(--gold-light);
            }

            .content-wrap {
                margin-left: 0;
            }

            .article-main {
                padding: 84px 26px 60px;
            }

            .site-footer {
                padding: 52px 24px 28px;
            }
        }

        @media (max-width: 767.98px) {
            .article-main {
                padding: 76px 18px 46px;
            }

            .article-shell {
                max-width: 720px;
            }

            .article-meta {
                gap: 8px 0;
                flex-direction: column;
                align-items: flex-start;
            }

            .article-meta li {
                display: flex;
                width: 100%;
            }

            .crumb-current {
                max-width: 180px;
            }

            .article-cover img {
                aspect-ratio: 3 / 2;
            }

            .article-lead {
                padding: 22px 20px;
                font-size: 16px;
            }

            .article-content {
                font-size: 16px;
                line-height: 1.85;
            }

            .article-content h2 {
                font-size: 23px;
            }

            .article-content h3 {
                font-size: 19px;
            }

            .site-footer {
                padding-left: 18px;
                padding-right: 18px;
            }
        }

        @media (max-width: 479.98px) {
            .article-head h1 {
                font-size: 30px;
                line-height: 1.42;
            }

            .article-main {
                padding-left: 14px;
                padding-right: 14px;
            }

            .article-lead {
                padding-left: 16px;
                padding-right: 16px;
            }

            .article-kicker {
                font-size: 12px;
            }

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

            .article-cover img {
                aspect-ratio: 1 / 0.86;
            }
        }

        .mast-panel {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
        }

        .outline-link {
            color: var(--ink);
            font-size: 15px;
            font-weight: 500;
            transition: color 0.2s ease, transform 0.2s ease;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .outline-link:hover {
            color: var(--gold-dark);
            transform: translateX(4px);
        }

        .divider-wrap {
            margin: 46px 0;
            border-top: 1px solid var(--line);
        }

        .article-backlink {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--muted);
            font-size: 14px;
            text-decoration: none;
        }

        .article-backlink:hover {
            color: var(--gold-dark);
        }

/* roulang page: category1 */
:root {
    --bg: #F6F2E8;
    --surface: #FFFCF6;
    --ink: #201C17;
    --muted: #6F6A61;
    --line: rgba(23, 20, 15, 0.14);
    --gold: #A77833;
    --gold-dark: #7E5820;
    --ink-deep: #14110D;
    --cream: #EADFC9;
    --font-serif: Georgia, "Noto Serif SC", "Source Han Serif SC", "Songti SC", SimSun, serif;
    --font-sans: "PingFang SC", "HarmonyOS Sans", "Microsoft YaHei", "Segoe UI", sans-serif;
    --radius-sm: 6px;
    --radius-md: 10px;
}

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

html {
    margin: 0;
    padding: 0;
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: var(--font-sans);
    background: var(--bg);
    color: var(--ink);
    font-size: 16px;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

body.nav-open {
    overflow: hidden;
}

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

a {
    color: inherit;
    text-decoration: none;
    transition: color .25s ease, background-color .25s ease, border-color .25s ease, opacity .25s ease;
}

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

h1,
h2,
h3,
h4 {
    font-family: var(--font-serif);
    line-height: 1.3;
    margin: 0 0 .6em;
}

p {
    margin-top: 0;
    margin-bottom: 1rem;
}

.container {
    max-width: 1200px;
}

:focus-visible {
    outline: 3px solid rgba(167, 120, 51, .55);
    outline-offset: 3px;
    box-shadow: none;
}

/* ========== Topbar mobile ========== */
.mobile-topbar {
    display: none;
}

/* ========== Sidebar ========== */
.site-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: 300px;
    height: 100vh;
    background:
        radial-gradient(circle at 18% 10%, rgba(167, 120, 51, .16), transparent 36%),
        linear-gradient(160deg, #17130D 0%, #0F0C09 70%);
    color: rgba(234, 223, 201, .78);
    z-index: 1045;
    display: flex;
    flex-direction: column;
    border-right: 1px solid rgba(234, 223, 201, .06);
}

.sidebar-brand {
    height: 96px;
    display: flex;
    align-items: center;
    padding: 0 28px;
    border-bottom: 1px solid rgba(234, 223, 201, .08);
}

.logo-name {
    font-family: var(--font-serif);
    font-size: 27px;
    letter-spacing: .02em;
    color: #F5EEDF;
    line-height: 1.25;
}

.logo-sub {
    display: block;
    font-family: var(--font-sans);
    font-size: 11px;
    letter-spacing: .32em;
    color: rgba(234, 223, 201, .35);
    margin-top: 3px;
}

.sidebar-nav {
    flex: 1;
    padding: 42px 0 20px;
    overflow-y: auto;
}

.nav-label {
    display: block;
    padding: 0 30px;
    margin-bottom: 14px;
    font-size: 11px;
    letter-spacing: .28em;
    color: rgba(234, 223, 201, .32);
}

.nav-item {
    position: relative;
    display: grid;
    grid-template-columns: 46px 1fr;
    align-items: center;
    padding: 15px 30px;
    color: rgba(234, 223, 201, .62);
    border-bottom: 1px solid rgba(234, 223, 201, .05);
    transition: background-color .25s ease, color .25s ease, padding-left .25s ease;
}

.nav-item::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    width: 3px;
    height: 24px;
    background: var(--gold);
    transform: translateY(-50%) scaleY(0);
    transform-origin: center;
    transition: transform .22s ease;
}

.nav-item.active,
.nav-item:hover {
    color: var(--gold);
    background: rgba(255, 255, 255, .04);
}

.nav-item.active::before,
.nav-item:hover::before {
    transform: translateY(-50%) scaleY(1);
}

.nav-index {
    font-family: var(--font-serif);
    font-size: 13px;
    letter-spacing: .1em;
    color: rgba(234, 223, 201, .3);
}

.nav-item.active .nav-index,
.nav-item:hover .nav-index {
    color: rgba(234, 223, 201, .55);
}

.nav-text {
    font-size: 16px;
    letter-spacing: .04em;
}

.sidebar-foot {
    padding: 24px 30px 32px;
    border-top: 1px solid rgba(234, 223, 201, .07);
}

.foot-title {
    font-size: 11px;
    letter-spacing: .24em;
    color: rgba(234, 223, 201, .32);
    display: block;
    margin-bottom: 8px;
}

.foot-link {
    display: block;
    font-size: 14px;
    color: rgba(234, 223, 201, .58);
    padding: 4px 0;
}

.foot-link:hover {
    color: var(--gold);
}

.foot-link .hairline {
    display: inline-block;
    width: 20px;
    height: 1px;
    background: rgba(234, 223, 201, .22);
    vertical-align: middle;
    margin-right: 7px;
}

/* ========== Main layout ========== */
.main-shell,
.site-footer {
    margin-left: 300px;
}

.page-main {
    min-height: 60vh;
}

/* ========== Category Hero ========== */
.category-hero {
    position: relative;
    background: var(--bg);
    padding: 104px 0 96px;
    border-bottom: 1px solid var(--line);
    overflow: hidden;
}

.category-hero::before {
    content: "";
    position: absolute;
    right: -70px;
    top: -70px;
    width: 260px;
    height: 260px;
    border: 1px solid rgba(167, 120, 51, .2);
    border-radius: 50%;
}

.category-hero::after {
    content: "";
    position: absolute;
    right: 7%;
    bottom: -120px;
    width: 260px;
    height: 260px;
    border-radius: 50%;
    background: rgba(167, 120, 51, .07);
}

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

.crumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    letter-spacing: .05em;
    color: var(--muted);
    margin-bottom: 28px;
}

.crumb a {
    color: var(--gold-dark);
}

.crumb a:hover {
    color: var(--ink);
}

.crumb-sep {
    opacity: .45;
}

.hero-kicker {
    display: flex;
    align-items: center;
    gap: 14px;
    font-size: 13px;
    letter-spacing: .22em;
    color: var(--gold);
    font-weight: 600;
}

.kicker-line {
    width: 42px;
    height: 2px;
    background: var(--gold);
    display: inline-block;
}

.category-hero h1 {
    margin: 22px 0 18px;
    font-size: clamp(40px, 6.8vw, 76px);
    font-weight: 600;
    letter-spacing: .02em;
    color: var(--ink);
}

.hero-gold {
    color: var(--gold);
}

.hero-lead {
    color: var(--muted);
    font-size: clamp(17px, 2vw, 22px);
    line-height: 1.7;
    max-width: 660px;
    margin-bottom: 34px;
}

.hero-actions .btn {
    margin-right: 6px;
}

/* ========== Buttons ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 52px;
    padding: 0 30px;
    font-size: 15px;
    font-weight: 600;
    letter-spacing: .04em;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    transition: background-color .25s ease, color .25s ease, border-color .25s ease, transform .25s ease, box-shadow .25s ease;
}

.btn-primary {
    background: var(--ink-deep);
    color: #FFFCF6;
    border-color: var(--ink-deep);
}

.btn-primary:hover,
.btn-primary:focus {
    background: var(--gold);
    border-color: var(--gold);
    color: #FFFCF6;
    transform: translateY(-2px);
}

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

.btn-ink-outline:hover {
    background: var(--ink);
    color: #FFFCF6;
    border-color: var(--ink);
    transform: translateY(-2px);
}

/* ========== Page sections ========== */
.section-pad {
    padding: 104px 0;
}

.cat-intro {
    background: var(--surface);
}

.section-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: .24em;
    color: var(--gold);
    margin-bottom: 14px;
}

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

.section-meta.light {
    color: #D7B98C;
}

.section-title {
    font-size: clamp(30px, 4vw, 46px);
    font-weight: 600;
    color: var(--ink);
    letter-spacing: .01em;
}

.section-desc {
    color: var(--muted);
    font-size: 17px;
    max-width: 720px;
}

.lead-copy {
    color: var(--muted);
    font-size: 17px;
    line-height: 1.95;
}

.lead-copy strong {
    color: var(--ink);
    font-weight: 600;
}

.intro-list {
    padding: 0;
    margin: 24px 0 0;
    list-style: none;
}

.intro-list li {
    position: relative;
    padding: 8px 0 8px 28px;
    color: var(--muted);
    border-bottom: 1px solid var(--line);
}

.intro-list li:last-child {
    border-bottom: 0;
}

.intro-list li::before {
    content: "";
    position: absolute;
    left: 4px;
    top: 20px;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--gold);
}

.image-block {
    margin: 0;
}

.image-frame {
    position: relative;
    border-radius: var(--radius-md);
}

.image-frame::after {
    content: "";
    position: absolute;
    left: -14px;
    top: 16px;
    width: 100%;
    height: 100%;
    border: 1px solid rgba(167, 120, 51, .32);
    border-radius: var(--radius-md);
}

.image-frame img {
    position: relative;
    z-index: 1;
    border-radius: var(--radius-md);
    box-shadow: 0 26px 46px rgba(32, 28, 23, .10);
    object-fit: cover;
    width: 100%;
    aspect-ratio: 4 / 3;
}

.fig-cap {
    padding: 16px 4px 0;
    font-size: 13px;
    color: var(--muted);
}

/* ========== Type lines ========== */
.type-section {
    background: var(--bg);
    border-top: 1px solid var(--line);
    padding: 104px 0;
}

.type-list {
    border-top: 1px solid var(--line);
    margin-top: 46px;
}

.type-item {
    display: grid;
    grid-template-columns: 92px 1fr 34px;
    align-items: center;
    gap: 16px;
    padding: 26px 10px;
    border-bottom: 1px solid var(--line);
    transition: background-color .25s ease, transform .25s ease;
}

.type-item:hover {
    background: rgba(167, 120, 51, .045);
    transform: translateX(5px);
}

.type-index {
    font-family: var(--font-serif);
    font-size: 42px;
    line-height: 1;
    color: rgba(32, 28, 23, .22);
    transition: color .25s ease;
}

.type-item:hover .type-index {
    color: var(--gold);
}

.type-body h3 {
    font-size: 23px;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 3px;
}

.type-body p {
    margin: 0;
    color: var(--muted);
    max-width: 740px;
}

.type-arrow {
    color: var(--gold);
    font-size: 28px;
    line-height: 1;
}

/* ========== Source band ========== */
.source-band {
    background:
        radial-gradient(circle at 18% 18%, rgba(167, 120, 51, .18), transparent 30%),
        var(--ink-deep);
    color: rgba(234, 223, 201, .72);
    padding: 118px 0;
}

.source-band .section-title {
    color: #F5EEDF;
}

.source-band .section-desc,
.source-band .lead-copy {
    color: rgba(234, 223, 201, .62);
}

.source-band p {
    color: rgba(234, 223, 201, .66);
}

.guard-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.guard-card {
    background: rgba(255, 255, 255, .025);
    border: 1px solid rgba(234, 223, 201, .1);
    border-radius: var(--radius-md);
    padding: 30px 24px 26px;
    transition: border-color .25s ease, background-color .25s ease, transform .25s ease;
}

.guard-card:hover {
    border-color: rgba(167, 120, 51, .55);
    background: rgba(255, 255, 255, .04);
    transform: translateY(-4px);
}

.guard-num {
    font-family: var(--font-serif);
    font-size: 42px;
    color: var(--gold);
    display: block;
    line-height: 1;
    margin-bottom: 16px;
}

.guard-card h3 {
    color: #F5EEDF;
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 8px;
}

.guard-card p {
    color: rgba(234, 223, 201, .55);
    font-size: 15px;
    margin-bottom: 0;
}

/* ========== Steps ========== */
.steps-section {
    background: var(--surface);
    border-top: 1px solid var(--line);
    padding: 104px 0;
}

.steps-wrap {
    max-width: 900px;
    margin-top: 52px;
    position: relative;
    padding-left: 54px;
}

.steps-wrap::before {
    content: "";
    position: absolute;
    left: 14px;
    top: 16px;
    bottom: 36px;
    width: 1px;
    background: linear-gradient(to bottom, var(--gold), rgba(167, 120, 51, .12));
}

.step-item {
    position: relative;
    padding: 0 0 44px 42px;
}

.step-item:last-child {
    padding-bottom: 0;
}

.step-dot {
    position: absolute;
    left: -54px;
    top: 0;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid var(--gold);
    background: var(--surface);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-serif);
    font-size: 16px;
    font-weight: 700;
    color: var(--gold);
}

.step-item h3 {
    font-size: 22px;
    color: var(--ink);
    margin-bottom: 4px;
}

.step-item p {
    color: var(--muted);
    margin-bottom: 0;
    max-width: 680px;
}

/* ========== FAQ ========== */
.faq-section {
    background: var(--bg);
    border-top: 1px solid var(--line);
    padding: 104px 0;
}

.faq-wrap {
    max-width: 860px;
    margin-top: 42px;
}

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

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

.accordion-button.faq-button {
    position: relative;
    display: flex;
    align-items: center;
    gap: 18px;
    background: transparent;
    color: var(--ink);
    font-family: var(--font-serif);
    font-size: 19px;
    font-weight: 600;
    padding: 26px 58px 26px 0;
    border: 0;
    box-shadow: none;
    text-align: left;
    width: 100%;
    transition: color .25s ease;
}

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

.accordion-button.faq-button:not(.collapsed) {
    color: var(--gold);
    background: transparent;
    box-shadow: none;
}

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

.accordion-button.faq-button:focus {
    border: 0;
    box-shadow: none;
}

.accordion-button.faq-button:focus-visible {
    outline: 2px solid rgba(167, 120, 51, .4);
    outline-offset: 2px;
    background: rgba(167, 120, 51, .04);
}

.faq-num {
    font-family: var(--font-serif);
    font-size: 14px;
    color: var(--gold);
    min-width: 30px;
}

.faq-icon {
    position: absolute;
    right: 0;
    top: 50%;
    width: 30px;
    height: 30px;
    transform: translateY(-50%);
}

.faq-icon::before,
.faq-icon::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 16px;
    height: 2px;
    background: var(--gold);
    transform: translate(-50%, -50%);
}

.faq-icon::after {
    transform: translate(-50%, -50%) rotate(90deg);
    transition: transform .25s ease;
}

.accordion-button:not(.collapsed) .faq-icon::after {
    transform: translate(-50%, -50%) rotate(0deg);
    opacity: 0;
}

.accordion-body.faq-body {
    padding: 2px 0 26px 48px;
    color: var(--muted);
    font-size: 16px;
    line-height: 1.85;
}

.accordion-body.faq-body p {
    margin-bottom: 0;
}

/* ========== Contact ========== */
.contact-band {
    background:
        radial-gradient(circle at 88% 10%, rgba(167, 120, 51, .16), transparent 28%),
        var(--ink-deep);
    color: rgba(234, 223, 201, .74);
    padding: 110px 0;
}

.contact-band .section-title {
    color: #F5EEDF;
}

.contact-note {
    font-size: 17px;
    color: rgba(234, 223, 201, .6);
    margin-bottom: 28px;
    max-width: 480px;
}

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

.contact-detail li {
    position: relative;
    padding: 10px 0 10px 28px;
    color: rgba(234, 223, 201, .62);
    border-bottom: 1px solid rgba(234, 223, 201, .09);
}

.contact-detail li::before {
    content: "";
    position: absolute;
    left: 4px;
    top: 23px;
    width: 7px;
    height: 7px;
    background: var(--gold);
    border-radius: 50%;
}

.contact-card {
    background: var(--surface);
    border-radius: var(--radius-md);
    padding: 38px;
    color: var(--ink);
    box-shadow: 0 26px 50px rgba(0, 0, 0, .18);
}

.contact-card h3 {
    font-size: 24px;
    margin-bottom: 18px;
}

.form-label {
    font-weight: 600;
    font-size: 14px;
    color: var(--ink);
    margin-bottom: 6px;
}

.form-control {
    min-height: 48px;
    background: #FFFCF6;
    border: 1px solid rgba(23, 20, 15, .18);
    border-radius: var(--radius-sm);
    padding: .75rem 1rem;
    color: var(--ink);
    transition: border-color .2s ease, box-shadow .2s ease, background-color .2s ease;
}

.form-control:focus {
    background: #FFFCF6;
    border-color: var(--gold);
    box-shadow: 0 0 0 4px rgba(167, 120, 51, .1);
    color: var(--ink);
}

textarea.form-control {
    min-height: 130px;
    resize: vertical;
}

/* ========== Footer ========== */
.site-footer {
    background:
        radial-gradient(circle at 78% 0%, rgba(167, 120, 51, .09), transparent 28%),
        var(--ink-deep);
    color: rgba(234, 223, 201, .58);
    border-top: 1px solid rgba(234, 223, 201, .06);
}

.footer-main {
    padding: 72px 0 48px;
}

.footer-brand .brand-name {
    display: block;
    font-family: var(--font-serif);
    font-size: 26px;
    color: #F5EEDF;
    margin-bottom: 12px;
}

.footer-brand p {
    color: rgba(234, 223, 201, .52);
    max-width: 340px;
    margin-bottom: 0;
}

.footer-title {
    font-size: 13px;
    font-weight: 600;
    letter-spacing: .2em;
    color: rgba(234, 223, 201, .8);
    margin-bottom: 14px;
}

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

.footer-links li {
    padding: 5px 0;
}

.footer-links a {
    color: rgba(234, 223, 201, .54);
    font-size: 15px;
}

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

.footer-bottom {
    border-top: 1px solid rgba(234, 223, 201, .08);
    padding: 20px 0;
    font-size: 13px;
    color: rgba(234, 223, 201, .38);
}

.footer-bottom p {
    margin: 0;
}

/* ========== Reveal ========== */
.reveal {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity .35s ease, transform .35s ease;
}

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

/* ========== Responsive ========== */
@media (max-width: 1199.98px) {
    .section-pad,
    .type-section,
    .steps-section,
    .faq-section {
        padding: 92px 0;
    }

    .source-band,
    .contact-band {
        padding: 100px 0;
    }

    .type-item {
        grid-template-columns: 66px 1fr 26px;
    }
}

@media (max-width: 991.98px) {
    body.nav-open {
        overflow: hidden;
    }

    .mobile-topbar {
        display: flex;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        height: 64px;
        z-index: 1050;
        background: #12100B;
        border-bottom: 1px solid rgba(234, 223, 201, .08);
        align-items: center;
        justify-content: space-between;
        padding: 0 18px;
    }

    .mobile-brand {
        font-family: var(--font-serif);
        font-size: 20px;
        color: #F5EEDF;
        letter-spacing: .02em;
        line-height: 64px;
    }

    .menu-toggle {
        display: inline-flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        width: 44px;
        height: 44px;
        border: 0;
        background: transparent;
        padding: 0;
        border-radius: var(--radius-sm);
    }

    .menu-toggle .bar {
        display: block;
        width: 20px;
        height: 2px;
        background: #EADFC9;
        margin: 3px 0;
        transition: opacity .2s ease, transform .2s ease;
    }

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

    .menu-toggle.is-open .bar:nth-child(2) {
        opacity: 0;
    }

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

    .site-sidebar {
        top: 64px;
        left: 0;
        width: 100%;
        height: calc(100vh - 64px);
        transform: translateX(-100%);
        transition: transform .32s ease;
        z-index: 1049;
        background: #12100B;
    }

    body.nav-open .site-sidebar {
        transform: translateX(0);
    }

    .sidebar-brand {
        display: none;
    }

    .sidebar-nav {
        padding: 30px 0 10px;
    }

    .nav-label {
        padding-left: 24px;
        padding-right: 24px;
    }

    .nav-item {
        grid-template-columns: 54px 1fr;
        padding: 18px 24px;
    }

    .nav-index {
        font-size: 15px;
    }

    .nav-text {
        font-size: 19px;
    }

    .sidebar-foot {
        padding: 18px 24px 40px;
    }

    .main-shell,
    .site-footer {
        margin-left: 0;
    }

    .main-shell {
        margin-top: 64px;
    }

    .category-hero {
        padding: 72px 0 64px;
    }

    .section-pad,
    .type-section,
    .steps-section,
    .faq-section {
        padding: 72px 0;
    }

    .source-band,
    .contact-band {
        padding: 80px 0;
    }

    .type-item {
        grid-template-columns: 52px 1fr 22px;
        padding: 20px 4px;
    }

    .type-body h3 {
        font-size: 21px;
    }

    .guard-grid {
        grid-template-columns: 1fr 1fr;
        margin-top: 36px;
    }

    .steps-wrap {
        padding-left: 44px;
    }

    .step-dot {
        left: -44px;
    }

    .footer-main {
        padding: 48px 0 32px;
    }
}

@media (max-width: 767.98px) {
    .category-hero {
        padding: 54px 0 48px;
    }

    .category-hero h1 {
        font-size: 38px;
        line-height: 1.25;
    }

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

    .btn {
        min-height: 50px;
        padding: 0 22px;
        font-size: 14px;
    }

    .hero-actions .btn {
        margin: 0 0 10px;
    }

    .section-title {
        font-size: 30px;
    }

    .section-desc,
    .lead-copy {
        font-size: 16px;
    }

    .type-list {
        margin-top: 26px;
    }

    .type-item {
        grid-template-columns: 1fr;
        gap: 8px;
        padding: 20px 2px;
    }

    .type-index {
        font-size: 32px;
    }

    .type-arrow {
        display: none;
    }

    .guard-grid {
        grid-template-columns: 1fr;
        gap: 14px;
    }

    .guard-card {
        padding: 24px 20px;
    }

    .steps-wrap {
        padding-left: 0;
    }

    .steps-wrap::before {
        display: none;
    }

    .step-item {
        padding-left: 0;
        padding-bottom: 34px;
    }

    .step-dot {
        position: static;
        left: auto;
        width: 34px;
        height: 34px;
        margin-bottom: 12px;
    }

    .step-item h3 {
        font-size: 20px;
    }

    .accordion-button.faq-button {
        font-size: 17px;
        padding: 20px 48px 20px 0;
    }

    .accordion-body.faq-body {
        padding-left: 0;
    }

    .faq-num {
        display: none;
    }

    .contact-card {
        padding: 28px 20px;
        margin-top: 28px;
    }

    .footer-main {
        padding: 36px 0 20px;
    }
}

@media (max-width: 520px) {
    .category-hero h1 {
        font-size: 34px;
    }

    .hero-kicker {
        font-size: 12px;
    }

    .section-meta {
        font-size: 11px;
        letter-spacing: .16em;
    }

    .image-frame::after {
        left: -8px;
        top: 10px;
    }

    .type-body p,
    .step-item p {
        font-size: 15px;
    }

    .footer-bottom {
        text-align: center;
    }
}

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

    *,
    *::before,
    *::after {
        transition: none !important;
        animation: none !important;
    }

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

/* roulang page: category2 */
:root {
            --paper: #F6F2E8;
            --paper-soft: #FFFCF6;
            --ink: #201C17;
            --ink-soft: #6F6A61;
            --gold: #A77833;
            --gold-dark: #7E5820;
            --coal: #14110D;
            --coal-soft: #1E1A15;
            --line: rgba(23, 20, 15, 0.14);
            --line-light: rgba(234, 223, 201, 0.16);
            --serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", SimSun, serif;
            --sans: -apple-system, BlinkMacSystemFont, "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
            --radius: 10px;
            --shadow: 0 12px 34px rgba(32, 28, 23, 0.08);
            --gold-glow: rgba(167, 120, 51, 0.14);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            background-color: var(--paper);
            color: var(--ink);
            font-family: var(--sans);
            font-size: 16px;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            text-rendering: optimizeLegibility;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color .25s ease, background-color .25s ease, border-color .25s ease, opacity .25s ease;
        }

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

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

        p {
            margin-top: 0;
        }

        button,
        input,
        textarea {
            font-family: inherit;
            outline: none;
        }

        button:focus-visible,
        a:focus-visible {
            outline: 3px solid rgba(167, 120, 51, 0.45);
            outline-offset: 3px;
        }

        .content-shell {
            margin-left: 300px;
            min-height: 100vh;
            background: var(--paper);
        }

        .container {
            max-width: 1200px;
        }

        .site-sidebar {
            position: fixed;
            left: 0;
            top: 0;
            bottom: 0;
            width: 300px;
            z-index: 1030;
            background: var(--coal);
            border-right: 1px solid rgba(234, 223, 201, 0.12);
            color: #EADFC9;
        }

        .sidebar-inner {
            display: flex;
            flex-direction: column;
            height: 100%;
            padding: 28px 24px 24px;
        }

        .sidebar-brand {
            display: flex;
            flex-direction: column;
            justify-content: center;
            min-height: 92px;
            padding: 6px 4px 22px;
            border-bottom: 1px solid rgba(234, 223, 201, 0.16);
            margin-bottom: 26px;
            transition: opacity .25s ease;
        }

        .sidebar-brand:hover {
            opacity: .82;
        }

        .brand-mark {
            font-size: 12px;
            letter-spacing: .42em;
            color: rgba(234, 223, 201, 0.5);
            font-weight: 500;
            margin-bottom: 4px;
        }

        .brand-name-core {
            font-family: var(--serif);
            font-size: 27px;
            font-weight: 700;
            letter-spacing: .03em;
            color: #F3EAD9;
            line-height: 1.3;
        }

        .brand-name-core span {
            color: var(--gold);
        }

        .sidebar-nav {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .nav-label {
            font-size: 12px;
            letter-spacing: .32em;
            text-transform: uppercase;
            color: rgba(234, 223, 201, 0.42);
            margin-bottom: 10px;
            padding-left: 12px;
        }

        .nav-item {
            position: relative;
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 15px 12px;
            border-radius: 2px;
            color: rgba(234, 223, 201, 0.72);
            font-size: 15px;
            font-weight: 500;
            transition: color .25s ease, background-color .25s ease, padding-left .25s ease;
        }

        .nav-item::before {
            content: "";
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%) scaleY(0);
            width: 2px;
            height: 24px;
            background: var(--gold);
            transition: transform .25s ease;
        }

        .nav-item:hover {
            color: var(--gold);
            background: rgba(234, 223, 201, 0.04);
        }

        .nav-item.active::before {
            transform: translateY(-50%) scaleY(1);
        }

        .nav-item.active {
            color: #F3EAD9;
        }

        .nav-item.active .nav-text {
            color: var(--gold);
        }

        .nav-index {
            font-size: 12px;
            letter-spacing: .06em;
            color: rgba(234, 223, 201, 0.4);
            font-family: var(--serif);
            min-width: 18px;
        }

        .sidebar-foot {
            margin-top: auto;
            padding: 18px 12px 4px;
            border-top: 1px solid rgba(234, 223, 201, 0.12);
        }

        .sidebar-tip {
            display: block;
            font-size: 13px;
            color: rgba(234, 223, 201, 0.5);
            margin-bottom: 2px;
        }

        .sidebar-domain {
            font-size: 13px;
            color: rgba(167, 120, 51, 0.9);
            letter-spacing: .02em;
        }

        .mobile-topbar {
            display: none;
        }

        .nav-backdrop {
            position: fixed;
            inset: 0;
            background: rgba(20, 17, 13, 0.56);
            z-index: 1020;
            opacity: 0;
            pointer-events: none;
            transition: opacity .3s ease;
        }

        .category-hero {
            position: relative;
            min-height: 440px;
            padding: 92px 0 84px;
            background-color: var(--coal);
            color: #EADFC9;
            overflow: hidden;
        }

        .category-hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-position: center;
            background-size: cover;
            opacity: 0.22;
        }

        .category-hero::after {
            content: "";
            position: absolute;
            inset: 0;
            background: radial-gradient(circle at 78% 20%, var(--gold-glow), transparent 64%);
            pointer-events: none;
        }

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

        .breadcrumb-custom {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 4px;
            font-size: 14px;
            color: rgba(234, 223, 201, 0.6);
            margin-bottom: 28px;
            padding: 0;
        }

        .breadcrumb-custom a {
            color: rgba(234, 223, 201, 0.72);
            transition: color .25s ease;
        }

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

        .breadcrumb-custom .sep {
            margin: 0 8px;
            opacity: .54;
        }

        .breadcrumb-custom .current {
            color: rgba(234, 223, 201, 0.95);
        }

        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            letter-spacing: .2em;
            color: rgba(234, 223, 201, 0.85);
            border: 1px solid rgba(234, 223, 201, 0.38);
            padding: 7px 14px;
            margin-bottom: 20px;
            border-radius: 2px;
            background: rgba(255, 255, 255, 0.04);
        }

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

        .hero-title {
            font-family: var(--serif);
            font-size: clamp(38px, 5.4vw, 62px);
            line-height: 1.28;
            font-weight: 700;
            margin: 0 0 16px;
            color: #F7F2E7;
        }

        .hero-title .gold {
            color: var(--gold);
        }

        .hero-lead {
            font-size: 17px;
            color: rgba(234, 223, 201, 0.78);
            max-width: 560px;
            margin: 0;
            line-height: 1.85;
        }

        .section-block {
            padding: 92px 0;
            border-bottom: 1px solid var(--line);
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: .3em;
            color: var(--gold);
            margin-bottom: 12px;
            text-transform: uppercase;
        }

        .section-label::before {
            content: "";
            width: 26px;
            height: 1px;
            background: var(--gold);
            display: inline-block;
        }

        .section-title {
            font-family: var(--serif);
            font-size: clamp(29px, 3.4vw, 42px);
            line-height: 1.38;
            margin: 0 0 18px;
            color: var(--ink);
            font-weight: 700;
        }

        .section-sub {
            color: var(--ink-soft);
            max-width: 680px;
            margin-bottom: 30px;
            font-size: 17px;
            line-height: 1.85;
        }

        .lead-copy,
        .text-body-copy {
            color: var(--ink-soft);
            line-height: 1.9;
            font-size: 16px;
            margin-bottom: 18px;
        }

        .check-list {
            display: flex;
            flex-direction: column;
            gap: 13px;
            margin-top: 14px;
        }

        .check-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            color: var(--ink);
            font-size: 15px;
            line-height: 1.6;
        }

        .check-list li i {
            color: var(--gold);
            font-size: 18px;
            margin-top: 2px;
            flex: 0 0 auto;
        }

        .brief-note {
            margin-top: 34px;
            background: var(--paper-soft);
            border: 1px solid rgba(167, 120, 51, 0.36);
            border-left: 4px solid var(--gold);
            border-radius: 0 8px 8px 0;
            padding: 20px 24px;
            display: flex;
            gap: 16px;
            align-items: flex-start;
        }

        .brief-note i {
            color: var(--gold);
            font-size: 20px;
            margin-top: 3px;
        }

        .brief-note p {
            margin: 0;
            color: var(--ink-soft);
            font-size: 15px;
            line-height: 1.8;
        }

        .brief-note strong {
            color: var(--ink);
        }

        .visual-wrap {
            background: var(--paper-soft);
            border: 1px solid var(--line);
            border-radius: var(--radius);
            padding: 8px;
            box-shadow: var(--shadow);
        }

        .visual-wrap img {
            width: 100%;
            aspect-ratio: 5 / 3.5;
            object-fit: cover;
            border-radius: calc(var(--radius) - 4px);
        }

        .visual-caption {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 13px 8px 7px;
            color: var(--ink-soft);
            font-size: 14px;
            line-height: 1.6;
        }

        .visual-caption::before {
            content: "";
            width: 16px;
            height: 1px;
            background: var(--gold);
            flex: 0 0 auto;
        }

        .access-steps {
            margin-top: 14px;
            border-top: 1px solid var(--line);
        }

        .step-item {
            display: grid;
            grid-template-columns: 84px minmax(220px, 1fr) 1.7fr;
            gap: 12px 30px;
            align-items: start;
            border-bottom: 1px solid var(--line);
            padding: 36px 10px 36px 0;
            transition: background-color .28s ease, padding-left .28s ease;
        }

        .step-item:hover {
            background: rgba(167, 120, 51, 0.045);
        }

        .step-no {
            font-family: var(--serif);
            font-size: 40px;
            line-height: 1;
            color: var(--gold);
            font-weight: 600;
            letter-spacing: .02em;
        }

        .step-title {
            font-family: var(--serif);
            font-size: 21px;
            color: var(--ink);
            font-weight: 700;
            margin: 4px 0 8px;
            line-height: 1.4;
        }

        .step-body {
            color: var(--ink-soft);
            font-size: 15px;
            line-height: 1.85;
            margin: 0;
        }

        .band-dark {
            background: var(--coal);
            color: #EADFC9;
            border-bottom: none;
            position: relative;
            overflow: hidden;
        }

        .band-dark::before {
            content: "";
            position: absolute;
            top: -120px;
            right: -80px;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(167, 120, 51, 0.2), transparent 68%);
            pointer-events: none;
        }

        .band-dark .section-label {
            color: rgba(234, 223, 201, 0.66);
        }

        .band-dark .section-title {
            color: #F4ECDD;
        }

        .band-dark .section-sub {
            color: rgba(234, 223, 201, 0.68);
        }

        .compat-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 18px;
            margin-top: 34px;
            position: relative;
            z-index: 1;
        }

        .compat-cell {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(234, 223, 201, 0.14);
            border-radius: var(--radius);
            padding: 28px 24px;
            min-height: 182px;
            transition: background-color .28s ease, border-color .28s ease, transform .28s ease;
        }

        .compat-cell:hover {
            border-color: rgba(167, 120, 51, 0.55);
            background: rgba(255, 255, 255, 0.055);
            transform: translateY(-3px);
        }

        .compat-icon {
            width: 46px;
            height: 46px;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 1px solid rgba(167, 120, 51, 0.4);
            color: var(--gold);
            border-radius: 50%;
            font-size: 18px;
            margin-bottom: 18px;
        }

        .compat-cell h3 {
            font-family: var(--serif);
            font-size: 19px;
            color: #F3EADB;
            margin-bottom: 10px;
        }

        .compat-cell p {
            font-size: 14px;
            color: rgba(234, 223, 201, 0.62);
            line-height: 1.8;
            margin: 0;
        }

        .compat-range {
            margin-top: 30px;
            padding: 18px 20px;
            border: 1px dashed rgba(234, 223, 201, 0.28);
            border-radius: 6px;
            font-size: 14px;
            color: rgba(234, 223, 201, 0.7);
            display: flex;
            gap: 12px;
            align-items: center;
            position: relative;
            z-index: 1;
        }

        .compat-range i {
            color: var(--gold);
        }

        .safety-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
            margin-top: 26px;
        }

        .safety-item {
            border-top: 1px solid rgba(167, 120, 51, 0.28);
            padding-top: 24px;
        }

        .safety-item i {
            color: var(--gold);
            font-size: 24px;
            margin-bottom: 16px;
            display: block;
        }

        .safety-item h3 {
            font-family: var(--serif);
            font-size: 19px;
            color: var(--ink);
            margin-bottom: 8px;
        }

        .safety-item p {
            color: var(--ink-soft);
            font-size: 14px;
            line-height: 1.8;
            margin: 0;
        }

        .faq-zone {
            padding: 92px 0 86px;
            border-bottom: 1px solid var(--line);
        }

        .faq-panel {
            max-width: 880px;
            margin-top: 20px;
        }

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

        .accordion-button {
            display: flex;
            align-items: center;
            gap: 20px;
            background: transparent;
            box-shadow: none !important;
            color: var(--ink);
            font-family: var(--serif);
            font-size: 18px;
            font-weight: 600;
            padding: 24px 8px 22px 0;
            border-radius: 0 !important;
            transition: color .25s ease;
        }

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

        .accordion-button:hover {
            background: transparent;
            color: var(--gold-dark);
        }

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

        .faq-no {
            color: var(--gold);
            font-family: var(--serif);
            font-size: 14px;
            letter-spacing: .06em;
            min-width: 24px;
            border: 1px solid rgba(167, 120, 51, 0.35);
            border-radius: 2px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 24px;
            flex: 0 0 auto;
            line-height: 1;
        }

        .faq-q {
            flex: 1 1 auto;
            min-width: 0;
        }

        .acc-icon {
            flex: 0 0 auto;
            width: 26px;
            height: 26px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: var(--gold);
            font-weight: 400;
            transition: transform .3s ease, color .3s ease;
        }

        .acc-icon::after {
            content: "+";
            line-height: 1;
        }

        .accordion-button:not(.collapsed) .acc-icon {
            transform: rotate(45deg);
            color: var(--gold-dark);
        }

        .accordion-body {
            padding: 2px 24px 28px 52px;
            color: var(--ink-soft);
            font-size: 15px;
            line-height: 1.85;
            background: transparent;
        }

        .cta-band {
            position: relative;
            padding: 86px 0;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-position: center;
            background-size: cover;
            color: #EADFC9;
        }

        .cta-band::before {
            content: "";
            position: absolute;
            inset: 0;
            background: rgba(20, 17, 13, 0.86);
        }

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

        .cta-title {
            font-family: var(--serif);
            font-size: clamp(28px, 3.4vw, 42px);
            font-weight: 700;
            color: #F5EFE2;
            margin: 0 0 16px;
            line-height: 1.35;
        }

        .cta-copy {
            font-size: 16px;
            line-height: 1.85;
            color: rgba(234, 223, 201, 0.74);
            max-width: 600px;
            margin-bottom: 30px;
        }

        .btn-custom {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            border-radius: 4px;
            font-size: 15px;
            font-weight: 600;
            line-height: 1;
            padding: 17px 30px;
            border: 1px solid transparent;
            background: transparent;
            color: var(--ink);
            transition: background-color .28s ease, color .28s ease, border-color .28s ease, transform .25s ease, box-shadow .25s ease;
        }

        .btn-custom i {
            font-size: 13px;
            transition: transform .25s ease;
        }

        .btn-custom:hover i {
            transform: translateX(3px);
        }

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

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

        .btn-outline-light {
            border-color: rgba(234, 223, 201, 0.5);
            color: #EADFC9;
        }

        .btn-outline-light:hover {
            background: #EADFC9;
            color: var(--coal);
            border-color: #EADFC9;
            transform: translateY(-2px);
        }

        .site-footer {
            background: var(--coal);
            color: #cfc6b6;
            padding: 0;
        }

        .footer-main {
            padding: 62px 0 36px;
            border-bottom: 1px solid rgba(234, 223, 201, 0.12);
        }

        .footer-brand .brand-name {
            font-family: var(--serif);
            font-size: 23px;
            font-weight: 700;
            color: #EADFC9;
            display: block;
            margin-bottom: 14px;
            letter-spacing: .02em;
        }

        .footer-brand .brand-name span {
            color: var(--gold);
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.9;
            color: rgba(234, 223, 201, 0.52);
            max-width: 340px;
            margin-bottom: 16px;
        }

        .footer-domain-line {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: rgba(167, 120, 51, 0.85);
        }

        .footer-domain-line i {
            font-size: 13px;
        }

        .footer-title {
            font-family: var(--serif);
            font-size: 16px;
            color: #EADFC9;
            margin-bottom: 18px;
            padding-bottom: 10px;
            position: relative;
        }

        .footer-title::after {
            content: "";
            display: block;
            width: 22px;
            height: 1px;
            background: var(--gold);
            margin-top: 9px;
        }

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

        .footer-links a {
            color: rgba(234, 223, 201, 0.58);
            font-size: 14px;
            transition: color .25s ease, padding-left .25s ease;
        }

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

        .footer-bottom {
            padding: 18px 0;
        }

        .footer-bottom p {
            margin: 0;
            font-size: 13px;
            color: rgba(234, 223, 201, 0.4);
        }

        .reveal {
            opacity: 0;
            transform: translateY(14px);
            transition: opacity .35s ease, transform .35s ease;
        }

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

        @media (max-width: 1199.98px) {
            .step-item {
                grid-template-columns: 70px 1fr;
                gap: 10px 24px;
            }

            .step-body {
                grid-column: 2 / -1;
                margin-top: 8px;
            }

            .compat-cell {
                padding: 22px 18px;
            }

            .container {
                max-width: 100%;
                padding-left: 28px;
                padding-right: 28px;
            }
        }

        @media (max-width: 991.98px) {
            .content-shell {
                margin-left: 0;
                padding-top: 64px;
            }

            .site-sidebar {
                width: 300px;
                transform: translateX(-100%);
                transition: transform .34s ease;
                box-shadow: 20px 0 40px rgba(0, 0, 0, 0.3);
            }

            .site-sidebar.open {
                transform: translateX(0);
            }

            .mobile-topbar {
                position: fixed;
                top: 0;
                left: 0;
                right: 0;
                height: 64px;
                background: var(--coal);
                display: flex;
                align-items: center;
                justify-content: space-between;
                padding: 0 20px;
                z-index: 1041;
                border-bottom: 1px solid rgba(234, 223, 201, 0.1);
            }

            .mobile-brand {
                font-family: var(--serif);
                font-weight: 700;
                font-size: 19px;
                color: #F3E7D2;
                letter-spacing: .03em;
            }

            .mobile-brand span {
                color: var(--gold);
            }

            .nav-toggle {
                width: 44px;
                height: 44px;
                background: transparent;
                border: 1px solid rgba(234, 223, 201, 0.16);
                border-radius: 4px;
                display: flex;
                flex-direction: column;
                align-items: center;
                justify-content: center;
                gap: 5px;
                transition: border-color .25s ease, background-color .25s ease;
            }

            .nav-toggle:hover {
                border-color: var(--gold);
            }

            .nav-toggle span {
                display: block;
                width: 19px;
                height: 1.5px;
                background: #EADFC9;
                transition: background-color .25s ease;
            }

            .nav-toggle.active {
                border-color: var(--gold);
            }

            .body.nav-open .nav-backdrop {
                opacity: 1;
                pointer-events: auto;
            }

            .section-block,
            .faq-zone {
                padding: 72px 0;
            }
        }

        @media (max-width: 767.98px) {
            .category-hero {
                min-height: 380px;
                padding: 68px 0 58px;
            }

            .hero-title {
                font-size: clamp(32px, 8vw, 48px);
            }

            .section-block,
            .faq-zone {
                padding: 58px 0;
            }

            .step-item {
                grid-template-columns: 54px 1fr;
                padding: 26px 4px 26px 0;
            }

            .step-no {
                font-size: 30px;
            }

            .step-body {
                grid-column: 1 / -1;
                margin-left: 0;
            }

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

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

            .compat-range,
            .brief-note {
                flex-direction: column;
                align-items: flex-start;
            }

            .faq-body {
                padding: 2px 16px 24px 42px;
            }

            .footer-main {
                padding: 46px 0 24px;
            }
        }

        @media (max-width: 575.98px) {
            .container {
                padding-left: 20px;
                padding-right: 20px;
            }

            .hero-tag {
                font-size: 12px;
                padding: 6px 10px;
            }

            .hero-title {
                letter-spacing: .01em;
            }

            .section-title {
                font-size: 27px;
            }

            .section-label {
                letter-spacing: .2em;
            }

            .btn-custom {
                width: 100%;
                justify-content: center;
            }

            .cta-actions {
                display: flex;
                flex-direction: column;
                gap: 12px;
            }

            .accrodion-button .faq-q {
                font-size: 16px;
            }
        }

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

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

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