/* roulang page: index */
:root {
            --ink: #101010;
            --ink-soft: #161313;
            --panel: #1f1a1a;
            --panel-light: #282020;
            --paper: #f7f3ef;
            --text: #f4f1ec;
            --muted: #b9b0a8;
            --quiet: #847b75;
            --rose: #b84a5a;
            --rose-bright: #ca6570;
            --wine: #71333e;
            --copper: #b08a63;
            --line: rgba(255,255,255,.1);
            --line-dark: rgba(34,25,25,.12);
            --radius: 8px;
            --radius-large: 12px;
            --shadow: 0 18px 44px rgba(0,0,0,.22);
            --container: 1200px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            background: var(--ink);
            color: var(--text);
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", Arial, sans-serif;
            font-size: 16px;
            line-height: 1.8;
            letter-spacing: 0;
            overflow-x: hidden;
        }

        body::before {
            content: "";
            position: fixed;
            inset: 0;
            pointer-events: none;
            opacity: .24;
            background-image: linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px);
            background-size: 44px 44px;
            mask-image: linear-gradient(to bottom, black, transparent 75%);
        }

        a {
            color: inherit;
            text-decoration: none;
        }

        a, button, input {
            -webkit-tap-highlight-color: transparent;
        }

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

        button, input {
            font: inherit;
        }

        button {
            border: 0;
            cursor: pointer;
        }

        :focus-visible {
            outline: 3px solid rgba(202,101,112,.65);
            outline-offset: 3px;
        }

        .container {
            width: min(var(--container), calc(100% - 48px));
            margin-inline: auto;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 20;
            border-bottom: 1px solid var(--line);
            background: rgba(16,16,16,.92);
            backdrop-filter: blur(16px);
        }

        .nav-wrap {
            min-height: 76px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 28px;
        }

        .brand {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            min-width: 0;
            font-size: 17px;
            font-weight: 700;
            line-height: 1.3;
        }

        .brand-mark {
            width: 28px;
            height: 28px;
            flex: 0 0 28px;
            position: relative;
            border: 1px solid rgba(202,101,112,.8);
            border-radius: 7px;
            background: rgba(184,74,90,.18);
        }

        .brand-mark::after {
            content: "";
            position: absolute;
            width: 8px;
            height: 8px;
            top: 9px;
            left: 9px;
            border-radius: 50%;
            background: var(--rose-bright);
            box-shadow: 0 0 0 5px rgba(202,101,112,.12);
        }

        .brand-text {
            max-width: 250px;
            overflow-wrap: anywhere;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 25px;
            color: var(--muted);
            font-size: 14px;
        }

        .nav-links a {
            position: relative;
            padding: 24px 0;
            transition: color .2s ease;
        }

        .nav-links a::after {
            content: "";
            position: absolute;
            bottom: 17px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--rose-bright);
            transition: width .2s ease;
        }

        .nav-links a:hover,
        .nav-links a.active {
            color: var(--text);
        }

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

        .nav-action {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 40px;
            padding: 0 16px;
            border: 1px solid rgba(202,101,112,.55);
            border-radius: var(--radius);
            color: var(--text) !important;
            background: rgba(184,74,90,.12);
        }

        .nav-action::after {
            display: none;
        }

        .menu-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border: 1px solid var(--line);
            border-radius: var(--radius);
            color: var(--text);
            background: var(--panel);
            font-size: 20px;
        }

        .hero {
            position: relative;
            min-height: 670px;
            display: flex;
            align-items: center;
            padding: 92px 0 72px;
            background-image: linear-gradient(90deg, rgba(16,16,16,.98) 0%, rgba(16,16,16,.88) 43%, rgba(16,16,16,.45) 100%), url("/assets/images/backpic/back-1.jpg");
            background-size: cover;
            background-position: center;
            border-bottom: 1px solid var(--line);
        }

        .hero-grid {
            display: grid;
            grid-template-columns: minmax(0, 1.05fr) minmax(420px, .95fr);
            align-items: center;
            gap: 72px;
        }

        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 9px;
            margin-bottom: 20px;
            color: var(--copper);
            font-size: 12px;
            font-weight: 700;
            letter-spacing: 1px;
        }

        .eyebrow::before {
            content: "";
            width: 24px;
            height: 1px;
            background: var(--copper);
        }

        h1, h2, h3, p {
            margin-top: 0;
        }

        h1 {
            max-width: 690px;
            margin-bottom: 22px;
            font-size: clamp(42px, 5vw, 58px);
            line-height: 1.18;
            letter-spacing: 0;
            overflow-wrap: anywhere;
        }

        .hero-copy {
            max-width: 610px;
            color: var(--muted);
            font-size: 17px;
            line-height: 1.9;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin: 30px 0 26px;
        }

        .button {
            min-height: 48px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 9px;
            padding: 0 20px;
            border-radius: var(--radius);
            border: 1px solid transparent;
            font-size: 14px;
            font-weight: 700;
            transition: transform .2s ease, background .2s ease, border-color .2s ease, box-shadow .2s ease;
        }

        .button:hover {
            transform: translateY(-2px);
        }

        .button:active {
            transform: translateY(0);
        }

        .button-primary {
            color: #fff;
            background: var(--rose);
            box-shadow: 0 8px 20px rgba(184,74,90,.2);
        }

        .button-primary:hover {
            background: var(--rose-bright);
            box-shadow: 0 10px 25px rgba(184,74,90,.3);
        }

        .button-secondary {
            color: var(--text);
            border-color: rgba(202,101,112,.55);
            background: rgba(16,16,16,.35);
        }

        .button-secondary:hover {
            border-color: var(--rose-bright);
            background: rgba(184,74,90,.14);
        }

        .hero-note {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--quiet);
            font-size: 13px;
        }

        .status-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: #8eb08b;
            box-shadow: 0 0 0 5px rgba(142,176,139,.1);
        }

        .preview-panel {
            position: relative;
            min-height: 426px;
            overflow: hidden;
            padding: 20px;
            border: 1px solid rgba(255,255,255,.15);
            border-radius: var(--radius-large);
            background: rgba(27,22,22,.88);
            box-shadow: var(--shadow);
        }

        .preview-panel::before {
            content: "";
            position: absolute;
            width: 180px;
            height: 180px;
            top: -70px;
            right: -30px;
            border: 1px solid rgba(202,101,112,.3);
            border-radius: 50%;
        }

        .preview-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-bottom: 17px;
            border-bottom: 1px solid var(--line);
            color: var(--muted);
            font-size: 12px;
        }

        .preview-brand {
            color: var(--text);
            font-size: 14px;
            font-weight: 700;
        }

        .preview-body {
            position: relative;
            z-index: 1;
            padding-top: 28px;
        }

        .preview-kicker {
            color: var(--copper);
            font-size: 12px;
        }

        .preview-title {
            max-width: 390px;
            margin: 8px 0 25px;
            font-size: 27px;
            line-height: 1.4;
            overflow-wrap: anywhere;
        }

        .preview-line {
            height: 9px;
            margin-bottom: 10px;
            border-radius: 3px;
            background: rgba(255,255,255,.1);
        }

        .preview-line.short {
            width: 63%;
        }

        .preview-items {
            display: grid;
            gap: 10px;
            margin-top: 25px;
        }

        .preview-item {
            display: grid;
            grid-template-columns: 10px 1fr auto;
            align-items: center;
            gap: 12px;
            min-height: 55px;
            padding: 10px 13px;
            border: 1px solid var(--line);
            border-radius: 6px;
            background: rgba(255,255,255,.035);
            color: var(--muted);
            font-size: 12px;
        }

        .preview-item b {
            display: block;
            color: var(--text);
            font-size: 13px;
            font-weight: 600;
        }

        .preview-item i {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--rose);
        }

        .preview-item em {
            color: var(--quiet);
            font-style: normal;
        }

        .hero-stats {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 12px;
            margin-top: 48px;
        }

        .stat {
            padding: 16px 17px;
            border-top: 1px solid rgba(202,101,112,.55);
            background: rgba(16,16,16,.42);
        }

        .stat strong {
            display: block;
            margin-bottom: 3px;
            color: var(--text);
            font-size: 14px;
        }

        .stat span {
            display: block;
            color: var(--quiet);
            font-size: 12px;
            line-height: 1.5;
        }

        .notice-strip {
            border-bottom: 1px solid var(--line);
            background: var(--panel);
        }

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

        .notice {
            display: flex;
            gap: 13px;
            min-height: 104px;
            align-items: center;
            padding: 22px 24px;
            border-right: 1px solid var(--line);
        }

        .notice:last-child {
            border-right: 0;
        }

        .notice-icon {
            display: grid;
            place-items: center;
            width: 34px;
            height: 34px;
            flex: 0 0 34px;
            border: 1px solid rgba(202,101,112,.45);
            border-radius: 50%;
            color: var(--rose-bright);
            font-size: 13px;
        }

        .notice strong {
            display: block;
            color: var(--text);
            font-size: 14px;
        }

        .notice span {
            display: block;
            color: var(--quiet);
            font-size: 12px;
            line-height: 1.5;
        }

        .section {
            padding: 96px 0;
        }

        .section-light {
            color: #241e1d;
            background: var(--paper);
        }

        .section-heading {
            max-width: 650px;
            margin-bottom: 42px;
        }

        .section-heading .eyebrow {
            margin-bottom: 12px;
        }

        .section-heading h2 {
            margin-bottom: 12px;
            font-size: 34px;
            line-height: 1.3;
        }

        .section-heading p {
            margin-bottom: 0;
            color: var(--muted);
        }

        .section-light .section-heading p {
            color: #776d66;
        }

        .intro-grid {
            display: grid;
            grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr);
            gap: 68px;
            align-items: center;
        }

        .image-frame {
            position: relative;
            min-height: 450px;
            overflow: hidden;
            border-radius: var(--radius-large);
            background: #2a2020;
        }

        .image-frame img {
            width: 100%;
            height: 100%;
            min-height: 450px;
            object-fit: cover;
            opacity: .8;
        }

        .image-frame::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 34%, rgba(16,16,16,.78));
        }

        .image-caption {
            position: absolute;
            z-index: 1;
            right: 24px;
            bottom: 22px;
            left: 24px;
            color: #fff;
        }

        .image-caption strong {
            display: block;
            margin-bottom: 4px;
            font-size: 20px;
        }

        .image-caption span {
            color: #d7cfca;
            font-size: 13px;
        }

        .explain-list {
            display: grid;
            gap: 0;
        }

        .explain-item {
            display: grid;
            grid-template-columns: 42px 1fr;
            gap: 17px;
            padding: 22px 0;
            border-bottom: 1px solid var(--line);
        }

        .explain-item:first-child {
            padding-top: 0;
        }

        .explain-number {
            color: var(--rose-bright);
            font-size: 14px;
            font-weight: 700;
        }

        .explain-item h3 {
            margin-bottom: 5px;
            font-size: 19px;
        }

        .explain-item p {
            margin-bottom: 0;
            color: var(--muted);
            font-size: 14px;
            line-height: 1.7;
        }

        .feature-section {
            background: var(--ink-soft);
        }

        .feature-layout {
            display: grid;
            grid-template-columns: .72fr 1.28fr;
            gap: 54px;
            align-items: start;
        }

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

        .feature-link {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 15px;
            min-height: 70px;
            padding: 13px 0;
            border-bottom: 1px solid var(--line);
            color: var(--muted);
            transition: color .2s ease, padding .2s ease;
        }

        .feature-link:hover,
        .feature-link.active {
            padding-left: 10px;
            color: var(--text);
        }

        .feature-link.active {
            border-color: rgba(202,101,112,.55);
        }

        .feature-link span:first-child {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 15px;
        }

        .feature-link b {
            display: grid;
            place-items: center;
            width: 27px;
            height: 27px;
            border: 1px solid var(--line);
            border-radius: 50%;
            color: var(--rose-bright);
            font-size: 11px;
            font-weight: 700;
        }

        .feature-link span:last-child {
            color: var(--quiet);
            font-size: 18px;
        }

        .feature-preview {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }

        .feature-card {
            min-height: 192px;
            padding: 23px;
            border: 1px solid var(--line);
            border-radius: var(--radius);
            background: var(--panel);
            transition: border-color .2s ease, background .2s ease, transform .2s ease;
        }

        .feature-card:hover {
            transform: translateY(-3px);
            border-color: rgba(202,101,112,.5);
            background: var(--panel-light);
        }

        .feature-card.wide {
            grid-column: span 2;
            min-height: 155px;
            background: linear-gradient(110deg, #271b1d, #1f1a1a);
        }

        .feature-tag,
        .meta-tag {
            display: inline-flex;
            align-items: center;
            min-height: 24px;
            padding: 0 9px;
            border-radius: 999px;
            color: #e7adb3;
            background: rgba(184,74,90,.14);
            font-size: 11px;
            line-height: 1;
        }

        .feature-card h3 {
            margin: 17px 0 8px;
            font-size: 19px;
        }

        .feature-card p {
            margin-bottom: 0;
            color: var(--muted);
            font-size: 14px;
            line-height: 1.7;
        }

        .updates-section {
            background: #181515;
        }

        .updates-header {
            display: flex;
            align-items: end;
            justify-content: space-between;
            gap: 25px;
            margin-bottom: 35px;
        }

        .updates-header .section-heading {
            margin-bottom: 0;
        }

        .text-link {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            color: #e7adb3;
            font-size: 14px;
            white-space: nowrap;
            transition: color .2s ease, gap .2s ease;
        }

        .text-link:hover {
            gap: 11px;
            color: #fff;
            text-decoration: underline;
            text-underline-offset: 5px;
        }

        .updates-grid {
            display: grid;
            grid-template-columns: minmax(0, 1.08fr) minmax(320px, .92fr);
            gap: 20px;
        }

        .update-feature,
        .update-item {
            border: 1px solid var(--line);
            border-radius: var(--radius);
            background: var(--panel);
            transition: border-color .2s ease, background .2s ease, transform .2s ease;
        }

        .update-feature:hover,
        .update-item:hover {
            transform: translateY(-2px);
            border-color: rgba(202,101,112,.55);
            background: var(--panel-light);
        }

        .update-feature {
            min-height: 338px;
            padding: 30px;
            background-image: linear-gradient(145deg, rgba(38,24,26,.95), rgba(31,26,26,.94)), url("/assets/images/coverpic/cover-1.webp");
            background-size: cover;
            background-position: center;
        }

        .update-feature h3 {
            max-width: 510px;
            margin: 20px 0 12px;
            font-size: 26px;
            line-height: 1.45;
            overflow-wrap: anywhere;
        }

        .update-feature p {
            max-width: 510px;
            margin-bottom: 24px;
            color: var(--muted);
            font-size: 14px;
        }

        .update-list {
            display: grid;
            gap: 12px;
        }

        .update-item {
            min-height: 104px;
            padding: 18px 20px;
        }

        .update-item h3 {
            display: -webkit-box;
            overflow: hidden;
            margin: 9px 0 4px;
            font-size: 16px;
            line-height: 1.45;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
        }

        .update-item p {
            display: -webkit-box;
            overflow: hidden;
            margin: 0 0 8px;
            color: var(--muted);
            font-size: 13px;
            line-height: 1.6;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
        }

        .update-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px 12px;
            color: var(--quiet);
            font-size: 11px;
        }

        .empty-state {
            grid-column: 1 / -1;
            min-height: 190px;
            display: grid;
            place-items: center;
            padding: 30px;
            border: 1px dashed rgba(255,255,255,.18);
            border-radius: var(--radius);
            color: var(--muted);
            text-align: center;
        }

        .empty-state-mark {
            width: 38px;
            height: 38px;
            margin: 0 auto 10px;
            border: 1px solid var(--rose);
            border-radius: 50%;
            opacity: .8;
        }

        .process-section {
            color: #241e1d;
            background: var(--paper);
        }

        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 0;
            border-top: 1px solid var(--line-dark);
            border-bottom: 1px solid var(--line-dark);
        }

        .process-step {
            position: relative;
            min-height: 190px;
            padding: 28px 24px 24px 0;
            margin-right: 24px;
            border-right: 1px solid var(--line-dark);
        }

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

        .process-step b {
            display: block;
            margin-bottom: 24px;
            color: var(--rose);
            font-size: 13px;
        }

        .process-step h3 {
            margin-bottom: 7px;
            font-size: 18px;
        }

        .process-step p {
            margin-bottom: 0;
            color: #776d66;
            font-size: 14px;
            line-height: 1.65;
        }

        .trust-section {
            padding: 82px 0;
            background: #241b1c;
        }

        .trust-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 70px;
            align-items: center;
        }

        .trust-layout h2 {
            max-width: 480px;
            margin-bottom: 17px;
            font-size: 32px;
            line-height: 1.35;
        }

        .trust-layout > div > p {
            max-width: 540px;
            margin-bottom: 0;
            color: var(--muted);
        }

        .check-list {
            display: grid;
            gap: 12px;
        }

        .check-item {
            display: flex;
            align-items: flex-start;
            gap: 13px;
            padding: 14px 16px;
            border: 1px solid rgba(255,255,255,.1);
            border-radius: var(--radius);
            background: rgba(255,255,255,.035);
            color: var(--muted);
            font-size: 14px;
        }

        .check-item::before {
            content: "✓";
            display: grid;
            place-items: center;
            width: 21px;
            height: 21px;
            flex: 0 0 21px;
            border-radius: 50%;
            color: #f4d9d4;
            background: rgba(184,74,90,.62);
            font-size: 12px;
        }

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

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

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

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

        .faq-question {
            width: 100%;
            min-height: 72px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            padding: 18px 0;
            color: var(--text);
            background: transparent;
            text-align: left;
            font-size: 16px;
            font-weight: 600;
        }

        .faq-question span:last-child {
            color: var(--rose-bright);
            font-size: 24px;
            font-weight: 300;
            transition: transform .2s ease;
        }

        .faq-item.open .faq-question span:last-child {
            transform: rotate(45deg);
        }

        .faq-answer {
            display: none;
            max-width: 740px;
            padding: 0 42px 22px 0;
            color: var(--muted);
            font-size: 14px;
            line-height: 1.8;
        }

        .faq-item.open .faq-answer {
            display: block;
        }

        .cta-section {
            padding: 80px 0;
            background: #311f22;
        }

        .cta-box {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 35px;
        }

        .cta-box h2 {
            max-width: 650px;
            margin-bottom: 10px;
            font-size: 31px;
            line-height: 1.4;
        }

        .cta-box p {
            max-width: 600px;
            margin-bottom: 0;
            color: #cbb8b4;
        }

        .cta-actions {
            display: flex;
            flex: 0 0 auto;
            flex-wrap: wrap;
            gap: 10px;
        }

        .site-footer {
            padding: 58px 0 25px;
            border-top: 1px solid var(--line);
            background: #0b0b0b;
        }

        .footer-main {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 60px;
            padding-bottom: 44px;
        }

        .footer-brand {
            max-width: 350px;
        }

        .footer-brand .brand {
            margin-bottom: 17px;
        }

        .footer-brand p {
            margin-bottom: 0;
            color: var(--quiet);
            font-size: 13px;
            line-height: 1.8;
        }

        .footer-column h3 {
            margin: 0 0 15px;
            color: var(--text);
            font-size: 14px;
        }

        .footer-links {
            display: grid;
            gap: 8px;
            color: var(--quiet);
            font-size: 13px;
        }

        .footer-links a {
            width: fit-content;
            transition: color .2s ease;
        }

        .footer-links a:hover {
            color: #e7adb3;
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 18px;
            padding-top: 22px;
            border-top: 1px solid var(--line);
            color: #625b57;
            font-size: 12px;
        }

        .age-badge {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 37px;
            height: 25px;
            margin-right: 8px;
            border: 1px solid rgba(176,138,99,.55);
            border-radius: 999px;
            color: var(--copper);
            font-size: 11px;
            font-weight: 700;
        }

        @media (max-width: 1024px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 42px;
            }

            .hero {
                min-height: auto;
            }

            .preview-panel {
                max-width: 680px;
            }

            .intro-grid,
            .feature-layout,
            .trust-layout {
                gap: 38px;
            }

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

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

        @media (max-width: 768px) {
            .container {
                width: min(100% - 36px, var(--container));
            }

            .nav-wrap {
                min-height: 68px;
            }

            .menu-toggle {
                display: block;
            }

            .nav-links {
                position: absolute;
                top: 68px;
                right: 18px;
                left: 18px;
                display: none;
                align-items: stretch;
                gap: 0;
                padding: 8px;
                border: 1px solid var(--line);
                border-radius: var(--radius);
                background: #171313;
                box-shadow: var(--shadow);
            }

            .nav-links.show {
                display: grid;
            }

            .nav-links a {
                padding: 13px 14px;
                border-radius: 5px;
            }

            .nav-links a::after {
                display: none;
            }

            .nav-links a:hover,
            .nav-links a.active {
                background: rgba(184,74,90,.12);
            }

            .nav-action {
                margin-top: 4px;
            }

            .hero {
                padding: 70px 0 56px;
                background-position: 62% center;
            }

            h1 {
                font-size: 36px;
            }

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

            .hero-stats {
                grid-template-columns: repeat(2, 1fr);
                margin-top: 34px;
            }

            .preview-panel {
                min-height: 350px;
            }

            .preview-title {
                font-size: 23px;
            }

            .notice-grid {
                display: flex;
                overflow-x: auto;
            }

            .notice {
                min-width: 270px;
                border-right: 1px solid var(--line);
            }

            .section {
                padding: 64px 0;
            }

            .section-heading {
                margin-bottom: 30px;
            }

            .section-heading h2,
            .trust-layout h2,
            .cta-box h2 {
                font-size: 27px;
            }

            .intro-grid,
            .feature-layout,
            .trust-layout {
                grid-template-columns: 1fr;
            }

            .image-frame,
            .image-frame img {
                min-height: 310px;
            }

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

            .feature-card.wide {
                grid-column: auto;
            }

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

            .process-step:nth-child(2) {
                border-right: 0;
                margin-right: 0;
            }

            .process-step:nth-child(3),
            .process-step:nth-child(4) {
                border-top: 1px solid var(--line-dark);
            }

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

            .footer-main {
                grid-template-columns: 1fr 1fr;
                gap: 35px 25px;
            }

            .footer-brand {
                grid-column: span 2;
            }
        }

        @media (max-width: 520px) {
            .container {
                width: min(100% - 30px, var(--container));
            }

            .brand-text {
                max-width: 190px;
                font-size: 15px;
            }

            .hero-actions,
            .hero-actions .button,
            .cta-actions,
            .cta-actions .button {
                width: 100%;
            }

            h1 {
                font-size: 32px;
            }

            .hero-stats {
                gap: 8px;
            }

            .stat {
                padding: 13px 12px;
            }

            .stat strong {
                font-size: 13px;
            }

            .preview-panel {
                min-height: 330px;
                padding: 16px;
            }

            .preview-item {
                grid-template-columns: 8px 1fr;
            }

            .preview-item em {
                display: none;
            }

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

            .process-step,
            .process-step:nth-child(2),
            .process-step:nth-child(3),
            .process-step:nth-child(4) {
                min-height: auto;
                margin-right: 0;
                padding: 22px 0 22px 20px;
                border-right: 0;
                border-top: 1px solid var(--line-dark);
            }

            .process-step:first-child {
                border-top: 0;
            }

            .process-step b {
                margin-bottom: 8px;
            }

            .update-feature {
                padding: 23px;
            }

            .update-feature h3 {
                font-size: 21px;
            }

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

            .footer-brand {
                grid-column: auto;
            }
        }

/* roulang page: article */
:root {
            --ink: #101010;
            --ink-soft: #161313;
            --panel: #1f1a1a;
            --panel-light: #282020;
            --paper: #f7f3ef;
            --text: #f4f1ec;
            --muted: #b9b0a8;
            --quiet: #847b75;
            --rose: #b84a5a;
            --rose-bright: #ca6570;
            --wine: #71333e;
            --copper: #b08a63;
            --line: rgba(255,255,255,.1);
            --line-dark: rgba(34,25,25,.12);
            --radius: 8px;
            --radius-large: 12px;
            --shadow: 0 18px 44px rgba(0,0,0,.22);
            --container: 1200px;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            margin: 0;
            background: var(--ink);
            color: var(--text);
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", Arial, sans-serif;
            font-size: 16px;
            line-height: 1.8;
            letter-spacing: 0;
            overflow-x: hidden;
        }
        body::before {
            content: "";
            position: fixed;
            inset: 0;
            pointer-events: none;
            opacity: .24;
            background-image:
                linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px);
            background-size: 44px 44px;
            mask-image: linear-gradient(to bottom, black, transparent 75%);
        }
        ::selection {
            background: rgba(184,74,90,.35);
            color: var(--text);
        }
        a {
            color: inherit;
            text-decoration: none;
        }
        a, button, input {
            -webkit-tap-highlight-color: transparent;
        }
        img {
            display: block;
            max-width: 100%;
        }
        button, input {
            font: inherit;
        }
        button {
            border: 0;
            cursor: pointer;
        }
        :focus-visible {
            outline: 2px solid rgba(202,101,112,.95);
            outline-offset: 3px;
        }
        .container {
            width: min(var(--container), calc(100% - 48px));
            margin-inline: auto;
        }
        .section-space {
            padding: 88px 0;
        }
        .site-header {
            position: sticky;
            top: 0;
            z-index: 30;
            border-bottom: 1px solid var(--line);
            background: rgba(16,16,16,.92);
            backdrop-filter: blur(16px);
        }
        .nav-wrap {
            min-height: 76px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            position: relative;
        }
        .brand {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            min-width: 0;
            font-size: 17px;
            font-weight: 700;
            line-height: 1.3;
        }
        .brand-mark {
            width: 28px;
            height: 28px;
            flex: 0 0 28px;
            position: relative;
            border: 1px solid rgba(202,101,112,.8);
            border-radius: 7px;
            background: rgba(184,74,90,.18);
        }
        .brand-mark::after {
            content: "";
            position: absolute;
            width: 8px;
            height: 8px;
            top: 9px;
            left: 9px;
            border-radius: 50%;
            background: var(--rose-bright);
            box-shadow: 0 0 0 5px rgba(202,101,112,.12);
        }
        .brand-text {
            max-width: 260px;
            overflow-wrap: anywhere;
        }
        .menu-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border: 1px solid var(--line);
            border-radius: var(--radius);
            color: var(--text);
            background: var(--panel);
            font-size: 20px;
            transition: transform .2s ease, border-color .2s ease, background .2s ease;
        }
        .menu-toggle:hover {
            transform: translateY(-1px);
            border-color: rgba(202,101,112,.45);
            background: var(--panel-light);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 25px;
            color: var(--muted);
            font-size: 14px;
        }
        .nav-links a {
            position: relative;
            padding: 24px 0;
            transition: color .2s ease, transform .2s ease;
        }
        .nav-links a::after {
            content: "";
            position: absolute;
            bottom: 17px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--rose-bright);
            transition: width .2s ease;
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--text);
        }
        .nav-links a:hover::after,
        .nav-links a.active::after {
            width: 100%;
        }
        .nav-action {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 40px;
            padding: 0 16px;
            border: 1px solid rgba(202,101,112,.55);
            border-radius: var(--radius);
            color: var(--text) !important;
            background: rgba(184,74,90,.12);
            transition: transform .2s ease, background .2s ease, border-color .2s ease;
        }
        .nav-action::after {
            display: none;
        }
        .nav-action:hover,
        .nav-action.active {
            background: rgba(184,74,90,.2);
            border-color: rgba(202,101,112,.75);
            transform: translateY(-1px);
        }
        .crumbs {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            color: var(--quiet);
            font-size: 13px;
            line-height: 1.6;
            margin: 4px 0 26px;
        }
        .crumbs a {
            color: var(--muted);
            transition: color .2s ease;
        }
        .crumbs a:hover {
            color: var(--rose-bright);
        }
        .article-shell {
            position: relative;
            padding: 34px 0 18px;
            background:
                linear-gradient(180deg, rgba(16,16,16,.4), rgba(16,16,16,.92)),
                url("/assets/images/backpic/back-2.webp") center/cover no-repeat;
            border-bottom: 1px solid var(--line);
        }
        .article-layout {
            display: grid;
            grid-template-columns: minmax(0, 1fr) 344px;
            gap: 28px;
            align-items: start;
        }
        .article-main {
            min-width: 0;
        }
        .article-head {
            padding: 28px;
            border: 1px solid var(--line);
            border-radius: var(--radius-large);
            background: rgba(31,26,26,.84);
            box-shadow: var(--shadow);
        }
        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 9px;
            margin-bottom: 18px;
            color: var(--copper);
            font-size: 12px;
            font-weight: 700;
            letter-spacing: 1px;
        }
        .eyebrow::before {
            content: "";
            width: 24px;
            height: 1px;
            background: var(--copper);
        }
        .article-head h1 {
            margin: 0;
            font-size: clamp(32px, 4.6vw, 52px);
            line-height: 1.18;
            letter-spacing: 0;
            color: var(--text);
            overflow-wrap: anywhere;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 10px 12px;
            margin-top: 18px;
            color: var(--muted);
            font-size: 13px;
        }
        .meta-chip {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 7px 10px;
            border: 1px solid var(--line);
            border-radius: 999px;
            background: rgba(255,255,255,.03);
        }
        .summary-box {
            margin-top: 20px;
            padding: 18px 18px 18px 20px;
            border-left: 3px solid var(--rose);
            border-radius: 0 var(--radius-large) var(--radius-large) 0;
            background: rgba(255,255,255,.04);
            color: var(--muted);
            font-size: 15px;
            line-height: 1.85;
            overflow-wrap: anywhere;
        }
        .cover-frame {
            margin-top: 18px;
            border: 1px solid var(--line);
            border-radius: var(--radius-large);
            overflow: hidden;
            background: var(--panel);
        }
        .cover-frame img {
            width: 100%;
            aspect-ratio: 16 / 7;
            object-fit: cover;
            filter: saturate(.92) contrast(1.02);
        }
        .cover-caption {
            padding: 12px 16px;
            color: var(--quiet);
            font-size: 13px;
            border-top: 1px solid var(--line);
            background: rgba(0,0,0,.16);
        }
        .content-body {
            margin-top: 18px;
            padding: 28px;
            border: 1px solid var(--line);
            border-radius: var(--radius-large);
            background: rgba(25,21,21,.9);
            box-shadow: var(--shadow);
            color: var(--text);
            overflow-wrap: anywhere;
        }
        .content-body > *:first-child {
            margin-top: 0;
        }
        .content-body > * + * {
            margin-top: 1em;
        }
        .content-body h2,
        .content-body h3 {
            margin: 1.6em 0 .7em;
            line-height: 1.35;
            color: var(--text);
            overflow-wrap: anywhere;
        }
        .content-body h2 {
            font-size: 26px;
        }
        .content-body h3 {
            font-size: 21px;
        }
        .content-body p,
        .content-body li,
        .content-body blockquote {
            color: var(--muted);
            font-size: 16px;
            line-height: 1.85;
        }
        .content-body ul,
        .content-body ol {
            padding-left: 1.25em;
            margin-bottom: 0;
        }
        .content-body li + li {
            margin-top: .45em;
        }
        .content-body a {
            color: #f3b2bb;
            text-decoration: underline;
            text-decoration-color: rgba(202,101,112,.4);
            text-underline-offset: 3px;
            transition: color .2s ease, text-decoration-color .2s ease;
        }
        .content-body a:hover {
            color: #ffd0d6;
            text-decoration-color: rgba(255,208,214,.75);
        }
        .content-body blockquote {
            margin: 1.4em 0;
            padding: 16px 18px;
            border-left: 3px solid var(--copper);
            border-radius: 0 var(--radius) var(--radius) 0;
            background: rgba(255,255,255,.035);
        }
        .content-body img {
            margin: 1.4em 0;
            border-radius: var(--radius);
            overflow: hidden;
        }
        .content-body table {
            display: block;
            width: 100%;
            overflow-x: auto;
            border-collapse: collapse;
            margin: 1.4em 0;
            background: rgba(255,255,255,.02);
            border: 1px solid var(--line);
            border-radius: var(--radius);
        }
        .content-body th,
        .content-body td {
            padding: 12px 14px;
            border-bottom: 1px solid var(--line);
            color: var(--muted);
            white-space: nowrap;
        }
        .content-body th {
            color: var(--text);
            background: rgba(255,255,255,.03);
            font-weight: 600;
        }
        .content-body pre {
            overflow: auto;
            margin: 1.4em 0;
            padding: 16px;
            border-radius: var(--radius);
            border: 1px solid var(--line);
            background: #0f0c0c;
            color: #f3e8e1;
        }
        .content-body code {
            padding: .15em .35em;
            border-radius: 4px;
            background: rgba(255,255,255,.08);
            color: #ffe7db;
            word-break: break-all;
        }
        .content-empty {
            padding: 24px;
            border: 1px dashed rgba(202,101,112,.35);
            border-radius: var(--radius-large);
            background: rgba(255,255,255,.03);
            text-align: center;
        }
        .content-empty h2 {
            margin: 0 0 10px;
            font-size: 26px;
            color: var(--text);
        }
        .content-empty p {
            margin: 0;
            color: var(--muted);
        }
        .article-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 18px;
        }
        .button {
            min-height: 48px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 9px;
            padding: 0 18px;
            border-radius: var(--radius);
            border: 1px solid transparent;
            font-size: 14px;
            font-weight: 600;
            transition: transform .2s ease, background .2s ease, border-color .2s ease, color .2s ease, box-shadow .2s ease;
            white-space: nowrap;
        }
        .button.primary {
            background: var(--rose);
            color: var(--text);
            box-shadow: 0 12px 30px rgba(184,74,90,.18);
        }
        .button.primary:hover {
            background: var(--rose-bright);
            transform: translateY(-1px);
        }
        .button.secondary {
            background: rgba(255,255,255,.03);
            color: var(--text);
            border-color: rgba(202,101,112,.45);
        }
        .button.secondary:hover {
            background: rgba(184,74,90,.12);
            border-color: rgba(202,101,112,.72);
            transform: translateY(-1px);
        }
        .button.ghost {
            background: transparent;
            color: var(--muted);
            border-color: var(--line);
        }
        .button.ghost:hover {
            background: rgba(255,255,255,.03);
            color: var(--text);
            border-color: rgba(202,101,112,.4);
            transform: translateY(-1px);
        }
        .article-aside {
            position: sticky;
            top: 98px;
            display: grid;
            gap: 18px;
        }
        .side-card {
            padding: 20px;
            border: 1px solid var(--line);
            border-radius: var(--radius-large);
            background: rgba(31,26,26,.82);
            box-shadow: var(--shadow);
        }
        .side-card h2,
        .side-card h3 {
            margin: 0 0 12px;
            font-size: 18px;
            line-height: 1.4;
            color: var(--text);
        }
        .side-card p,
        .side-card li {
            margin: 0;
            color: var(--muted);
            font-size: 14px;
            line-height: 1.8;
        }
        .check-list {
            display: grid;
            gap: 10px;
            margin: 0;
            padding: 0;
            list-style: none;
        }
        .check-list li {
            position: relative;
            padding-left: 20px;
            color: var(--muted);
        }
        .check-list li::before {
            content: "•";
            position: absolute;
            left: 0;
            top: 0;
            color: var(--rose-bright);
        }
        .mini-cover {
            border-radius: var(--radius);
            overflow: hidden;
            margin-bottom: 14px;
            border: 1px solid var(--line);
        }
        .mini-cover img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
        }
        .mini-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 12px;
        }
        .badge-soft {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 28px;
            padding: 0 10px;
            border-radius: 999px;
            border: 1px solid rgba(202,101,112,.28);
            background: rgba(184,74,90,.12);
            color: #f2d3d7;
            font-size: 12px;
            font-weight: 600;
        }
        .related-section {
            margin-top: 18px;
            padding: 24px 0 0;
        }
        .section-head {
            display: flex;
            flex-direction: column;
            gap: 10px;
            margin-bottom: 18px;
        }
        .section-head h2 {
            margin: 0;
            font-size: clamp(24px, 3vw, 34px);
            line-height: 1.25;
        }
        .section-head p {
            margin: 0;
            color: var(--muted);
            max-width: 72ch;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, minmax(0, 1fr));
            gap: 18px;
        }
        .related-card {
            display: flex;
            flex-direction: column;
            gap: 12px;
            min-height: 186px;
            padding: 18px;
            border: 1px solid var(--line);
            border-radius: var(--radius);
            background: rgba(255,255,255,.04);
            transition: transform .2s ease, background .2s ease, border-color .2s ease;
        }
        .related-card:hover {
            transform: translateY(-2px);
            background: rgba(255,255,255,.06);
            border-color: rgba(202,101,112,.42);
        }
        .related-card h3 {
            margin: 0;
            font-size: 18px;
            line-height: 1.45;
        }
        .related-card p {
            margin: 0;
            color: var(--muted);
            font-size: 14px;
            line-height: 1.7;
        }
        .related-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            color: var(--quiet);
            font-size: 12px;
            margin-top: auto;
        }
        .related-arrow {
            color: #f2c0c7;
            font-size: 14px;
        }
        .faq-section {
            padding: 88px 0;
        }
        .faq-list {
            display: grid;
            gap: 14px;
        }
        .faq-item {
            border: 1px solid var(--line);
            border-radius: var(--radius-large);
            background: rgba(255,255,255,.035);
            overflow: hidden;
        }
        .faq-item summary {
            position: relative;
            list-style: none;
            padding: 18px 56px 18px 20px;
            cursor: pointer;
            color: var(--text);
            font-weight: 600;
            line-height: 1.5;
            min-height: 56px;
            display: flex;
            align-items: center;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::after {
            content: "+";
            position: absolute;
            right: 18px;
            top: 50%;
            transform: translateY(-50%);
            width: 26px;
            height: 26px;
            border-radius: 999px;
            border: 1px solid var(--line);
            color: var(--rose-bright);
            display: grid;
            place-items: center;
            transition: transform .2s ease, background .2s ease;
        }
        .faq-item[open] summary {
            border-bottom: 1px solid var(--line);
        }
        .faq-item[open] summary::after {
            content: "–";
            background: rgba(184,74,90,.12);
            border-color: rgba(202,101,112,.45);
        }
        .faq-answer {
            padding: 16px 20px 20px;
            color: var(--muted);
            line-height: 1.85;
            font-size: 15px;
        }
        .cta-section {
            padding: 0 0 84px;
        }
        .cta-panel {
            padding: 28px;
            border: 1px solid rgba(202,101,112,.22);
            border-radius: var(--radius-large);
            background:
                linear-gradient(135deg, rgba(184,74,90,.14), rgba(31,26,26,.92)),
                url("/assets/images/backpic/back-3.jpg") center/cover no-repeat;
            box-shadow: var(--shadow);
        }
        .cta-inner {
            display: grid;
            grid-template-columns: minmax(0, 1fr) auto;
            gap: 22px;
            align-items: center;
        }
        .cta-panel h2 {
            margin: 0 0 10px;
            font-size: clamp(24px, 3vw, 34px);
            line-height: 1.25;
        }
        .cta-panel p {
            margin: 0;
            color: var(--muted);
            max-width: 66ch;
        }
        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }
        .site-footer {
            border-top: 1px solid var(--line);
            background: #0d0b0b;
            padding: 58px 0 22px;
        }
        .footer-main {
            display: grid;
            grid-template-columns: minmax(0, 1.3fr) repeat(2, minmax(0, .8fr));
            gap: 28px;
        }
        .footer-brand .brand {
            margin-bottom: 14px;
        }
        .footer-brand p {
            margin: 0;
            color: var(--muted);
            max-width: 42ch;
            line-height: 1.8;
        }
        .footer-column h3 {
            margin: 0 0 14px;
            font-size: 18px;
            color: var(--text);
        }
        .footer-links {
            display: grid;
            gap: 10px;
        }
        .footer-links a {
            color: var(--muted);
            transition: color .2s ease, transform .2s ease;
            width: fit-content;
        }
        .footer-links a:hover {
            color: var(--rose-bright);
            transform: translateX(2px);
        }
        .footer-bottom {
            margin-top: 28px;
            padding-top: 18px;
            border-top: 1px solid var(--line);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 12px;
            color: var(--quiet);
            font-size: 13px;
        }
        .age-badge {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 42px;
            height: 24px;
            padding: 0 8px;
            margin-right: 8px;
            border-radius: 999px;
            background: rgba(184,74,90,.18);
            color: #f3d0d5;
            font-weight: 700;
        }
        .text-link {
            color: #f3b2bb;
            text-decoration: none;
            position: relative;
        }
        .text-link::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 100%;
            height: 1px;
            background: rgba(243,178,187,.45);
            transform: scaleX(0);
            transform-origin: left;
            transition: transform .2s ease;
        }
        .text-link:hover::after {
            transform: scaleX(1);
        }
        @media (max-width: 1199px) {
            .article-layout {
                grid-template-columns: minmax(0, 1fr) 320px;
            }
            .related-grid {
                grid-template-columns: repeat(2, minmax(0, 1fr));
            }
        }
        @media (max-width: 991px) {
            .menu-toggle {
                display: inline-flex;
                align-items: center;
                justify-content: center;
            }
            .nav-links {
                position: absolute;
                left: 0;
                right: 0;
                top: 100%;
                display: none;
                flex-direction: column;
                align-items: flex-start;
                gap: 0;
                padding: 14px 0 16px;
                border-top: 1px solid var(--line);
                background: rgba(16,16,16,.98);
                backdrop-filter: blur(16px);
            }
            .site-header.menu-open .nav-links {
                display: flex;
            }
            .nav-links a {
                width: 100%;
                padding: 14px 0;
            }
            .nav-links a::after {
                bottom: 10px;
            }
            .nav-action {
                margin-top: 4px;
                width: 100%;
            }
            .article-layout {
                grid-template-columns: minmax(0, 1fr);
            }
            .article-aside {
                position: static;
                grid-template-columns: repeat(3, minmax(0, 1fr));
            }
            .footer-main {
                grid-template-columns: 1fr 1fr;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .cta-inner {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 767px) {
            .container {
                width: min(var(--container), calc(100% - 32px));
            }
            .section-space,
            .faq-section {
                padding: 58px 0;
            }
            .article-shell {
                padding-top: 22px;
            }
            .crumbs {
                margin-bottom: 18px;
            }
            .article-head,
            .content-body,
            .side-card,
            .cta-panel {
                padding: 20px;
            }
            .article-head h1 {
                font-size: clamp(30px, 8vw, 40px);
            }
            .article-meta {
                gap: 8px;
            }
            .article-aside {
                grid-template-columns: 1fr;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .footer-main {
                grid-template-columns: 1fr;
            }
            .footer-column {
                padding-top: 6px;
            }
            .footer-bottom {
                flex-direction: column;
            }
            .faq-item summary {
                padding-right: 48px;
            }
            .cta-actions,
            .article-actions {
                width: 100%;
            }
            .button {
                width: 100%;
            }
        }
        @media (max-width: 575px) {
            .brand-text {
                max-width: 188px;
            }
            .summary-box {
                font-size: 14px;
            }
            .content-body h2 {
                font-size: 22px;
            }
            .content-body h3 {
                font-size: 19px;
            }
            .content-body p,
            .content-body li,
            .faq-answer {
                font-size: 15px;
            }
            .content-body {
                padding: 18px;
            }
            .related-card {
                min-height: 0;
            }
        }

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}