/* roulang page: index */
:root {
            --ink: #17201d;
            --ink-soft: #52605a;
            --paper: #f7f4ee;
            --paper-deep: #eee9df;
            --surface: #ffffff;
            --forest: #164d3a;
            --forest-dark: #0d3326;
            --jade: #2f7b61;
            --mint: #dcebe3;
            --accent: #df6848;
            --accent-dark: #bd4d31;
            --gold: #c99a43;
            --line: rgba(23, 32, 29, .13);
            --line-strong: rgba(23, 32, 29, .24);
            --shadow-sm: 0 10px 30px rgba(26, 45, 37, .08);
            --shadow-lg: 0 28px 70px rgba(9, 35, 26, .18);
            --radius-sm: 12px;
            --radius-md: 20px;
            --radius-lg: 32px;
            --container: 1180px;
            --transition: .25s ease;
        }

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

        html {
            scroll-behavior: smooth;
            scroll-padding-top: 110px;
        }

        body {
            margin: 0;
            color: var(--ink);
            background: var(--paper);
            font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
            font-size: 16px;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }

        body.menu-open {
            overflow: hidden;
        }

        h1, h2, h3, h4, p {
            margin-top: 0;
        }

        h1, h2, h3, .masthead-brand {
            font-family: "Noto Serif SC", "Songti SC", "STSong", serif;
            letter-spacing: -.025em;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition), background-color var(--transition), border-color var(--transition), transform var(--transition);
        }

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

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

        button, input {
            font: inherit;
        }

        button, a, input {
            outline: none;
        }

        button:focus-visible,
        a:focus-visible,
        input:focus-visible {
            outline: 3px solid rgba(223, 104, 72, .35);
            outline-offset: 3px;
        }

        ::selection {
            color: #fff;
            background: var(--jade);
        }

        .site-container {
            width: min(calc(100% - 40px), var(--container));
            margin-inline: auto;
        }

        .skip-link {
            position: fixed;
            z-index: 9999;
            top: 12px;
            left: 12px;
            padding: 10px 16px;
            color: #fff;
            background: var(--forest-dark);
            border-radius: 10px;
            transform: translateY(-150%);
        }

        .skip-link:focus {
            color: #fff;
            transform: translateY(0);
        }

        .site-header {
            position: relative;
            z-index: 1000;
            color: var(--ink);
            background: rgba(247, 244, 238, .96);
            border-bottom: 1px solid var(--line);
            backdrop-filter: blur(14px);
        }

        .masthead {
            min-height: 112px;
            display: grid;
            grid-template-columns: 1fr auto 1fr;
            align-items: center;
            gap: 28px;
        }

        .masthead-note {
            max-width: 220px;
            color: var(--ink-soft);
            font-size: .79rem;
            line-height: 1.55;
            letter-spacing: .08em;
        }

        .masthead-note:last-child {
            justify-self: end;
            text-align: right;
        }

        .masthead-brand {
            position: relative;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--ink);
            font-size: clamp(1.5rem, 3vw, 2.45rem);
            font-weight: 800;
            white-space: nowrap;
        }

        .masthead-brand::before,
        .masthead-brand::after {
            content: "";
            width: 44px;
            height: 1px;
            margin: 0 18px;
            background: var(--line-strong);
        }

        .channel-bar {
            border-top: 1px solid var(--line);
            background: var(--surface);
        }

        .channel-inner {
            min-height: 58px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }

        .desktop-nav {
            display: flex;
            align-items: stretch;
            gap: 4px;
            align-self: stretch;
        }

        .nav-link-custom {
            position: relative;
            display: inline-flex;
            align-items: center;
            padding: 0 24px;
            color: var(--ink-soft);
            font-size: .94rem;
            font-weight: 700;
            letter-spacing: .04em;
        }

        .nav-link-custom::after {
            content: "";
            position: absolute;
            right: 24px;
            bottom: -1px;
            left: 24px;
            height: 3px;
            border-radius: 4px 4px 0 0;
            background: var(--accent);
            transform: scaleX(0);
            transition: transform var(--transition);
        }

        .nav-link-custom:hover,
        .nav-link-custom.active {
            color: var(--ink);
            background: rgba(22, 77, 58, .04);
        }

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

        .header-action {
            display: inline-flex;
            align-items: center;
            gap: 9px;
            color: var(--forest);
            font-size: .88rem;
            font-weight: 800;
        }

        .header-action svg {
            width: 18px;
            height: 18px;
        }

        .menu-toggle {
            display: none;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            color: var(--ink);
            background: transparent;
            border: 1px solid var(--line);
            border-radius: 50%;
        }

        .menu-toggle svg {
            width: 22px;
            height: 22px;
        }

        .mobile-panel {
            display: none;
        }

        .hero {
            position: relative;
            min-height: 680px;
            overflow: hidden;
            display: flex;
            align-items: end;
            color: #fff;
            isolation: isolate;
        }

        .hero-media,
        .hero-media video,
        .hero-media::after {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
        }

        .hero-media {
            z-index: -3;
            background: #102d25;
        }

        .hero-media video {
            object-fit: cover;
            opacity: .75;
        }

        .hero-media::after {
            content: "";
            background:
                linear-gradient(90deg, rgba(7, 25, 19, .9) 0%, rgba(7, 25, 19, .62) 52%, rgba(7, 25, 19, .2) 100%),
                linear-gradient(0deg, rgba(7, 25, 19, .88) 0%, transparent 58%);
        }

        .hero-content {
            width: 100%;
            padding: 108px 0 76px;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: minmax(0, 800px) auto;
            align-items: end;
            justify-content: space-between;
            gap: 70px;
        }

        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 9px;
            margin-bottom: 22px;
            color: #dcefe7;
            font-size: .83rem;
            font-weight: 800;
            letter-spacing: .12em;
        }

        .eyebrow::before {
            content: "";
            width: 34px;
            height: 2px;
            background: var(--accent);
        }

        .hero h1 {
            max-width: 820px;
            margin-bottom: 24px;
            color: #fff;
            font-size: clamp(2.65rem, 6vw, 5.35rem);
            font-weight: 800;
            line-height: 1.08;
            text-wrap: balance;
        }

        .hero-lead {
            max-width: 720px;
            margin-bottom: 31px;
            color: rgba(255, 255, 255, .82);
            font-size: clamp(1rem, 1.7vw, 1.18rem);
            line-height: 1.9;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 13px;
        }

        .btn-brand,
        .btn-outline-light-custom,
        .btn-paper,
        .btn-outline-brand {
            min-height: 52px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 9px;
            padding: 12px 23px;
            border: 1px solid transparent;
            border-radius: 999px;
            font-weight: 800;
            transition: transform var(--transition), box-shadow var(--transition), color var(--transition), background var(--transition), border-color var(--transition);
        }

        .btn-brand {
            color: #fff;
            background: var(--accent);
            box-shadow: 0 12px 28px rgba(223, 104, 72, .28);
        }

        .btn-brand:hover {
            color: #fff;
            background: var(--accent-dark);
            transform: translateY(-2px);
            box-shadow: 0 16px 36px rgba(223, 104, 72, .34);
        }

        .btn-outline-light-custom {
            color: #fff;
            background: rgba(255, 255, 255, .08);
            border-color: rgba(255, 255, 255, .38);
            backdrop-filter: blur(8px);
        }

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

        .btn-paper {
            color: var(--forest-dark);
            background: #fff;
            box-shadow: var(--shadow-sm);
        }

        .btn-paper:hover {
            color: var(--forest-dark);
            background: var(--mint);
            transform: translateY(-2px);
        }

        .btn-outline-brand {
            color: var(--forest);
            background: transparent;
            border-color: rgba(22, 77, 58, .32);
        }

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

        .play-control {
            width: 130px;
            height: 130px;
            display: inline-flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 9px;
            color: #fff;
            background: rgba(255, 255, 255, .1);
            border: 1px solid rgba(255, 255, 255, .45);
            border-radius: 50%;
            backdrop-filter: blur(12px);
            transition: transform var(--transition), background var(--transition);
        }

        .play-control:hover {
            color: #fff;
            background: rgba(223, 104, 72, .88);
            transform: scale(1.05);
        }

        .play-control svg {
            width: 33px;
            height: 33px;
        }

        .play-control span {
            font-size: .76rem;
            font-weight: 800;
            letter-spacing: .1em;
        }

        .hero-facts {
            position: absolute;
            right: 0;
            bottom: 0;
            left: 0;
            z-index: 2;
            pointer-events: none;
        }

        .fact-strip {
            width: min(calc(100% - 40px), var(--container));
            margin-inline: auto;
            display: flex;
            justify-content: flex-end;
        }

        .fact-box {
            display: flex;
            overflow: hidden;
            color: var(--ink);
            background: var(--paper);
            border-radius: 20px 20px 0 0;
            box-shadow: var(--shadow-lg);
        }

        .fact-item {
            min-width: 150px;
            padding: 17px 24px;
            border-right: 1px solid var(--line);
        }

        .fact-item:last-child {
            border: 0;
        }

        .fact-item strong {
            display: block;
            color: var(--forest);
            font-size: 1rem;
        }

        .fact-item span {
            color: var(--ink-soft);
            font-size: .76rem;
        }

        .section {
            padding: 100px 0;
        }

        .section-white {
            background: var(--surface);
        }

        .section-dark {
            color: #fff;
            background: var(--forest-dark);
        }

        .section-heading {
            display: grid;
            grid-template-columns: minmax(0, 1fr) minmax(280px, 480px);
            align-items: end;
            gap: 45px;
            margin-bottom: 45px;
        }

        .section-kicker {
            display: block;
            margin-bottom: 12px;
            color: var(--accent-dark);
            font-size: .78rem;
            font-weight: 900;
            letter-spacing: .14em;
        }

        .section-title {
            margin: 0;
            color: var(--ink);
            font-size: clamp(2rem, 4vw, 3.45rem);
            font-weight: 800;
            line-height: 1.18;
        }

        .section-dark .section-title {
            color: #fff;
        }

        .section-description {
            margin: 0;
            color: var(--ink-soft);
            font-size: 1rem;
            line-height: 1.9;
        }

        .section-dark .section-description {
            color: rgba(255, 255, 255, .7);
        }

        .comparison-shell {
            overflow: hidden;
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
        }

        .comparison-row {
            display: grid;
            grid-template-columns: 1.3fr repeat(3, 1fr);
            min-width: 790px;
        }

        .comparison-row + .comparison-row {
            border-top: 1px solid var(--line);
        }

        .comparison-cell {
            min-height: 82px;
            display: flex;
            align-items: center;
            padding: 20px 24px;
            border-right: 1px solid var(--line);
        }

        .comparison-cell:last-child {
            border-right: 0;
        }

        .comparison-head {
            color: #fff;
            background: var(--forest);
            font-size: .86rem;
            font-weight: 900;
        }

        .comparison-head .comparison-cell {
            min-height: 72px;
        }

        .comparison-label {
            font-weight: 900;
        }

        .comparison-note {
            display: block;
            color: var(--ink-soft);
            font-size: .79rem;
            line-height: 1.5;
        }

        .status {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--forest);
            font-size: .9rem;
            font-weight: 800;
        }

        .status::before {
            content: "✓";
            width: 24px;
            height: 24px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            background: var(--jade);
            border-radius: 50%;
            font-size: .72rem;
        }

        .status.muted {
            color: var(--ink-soft);
        }

        .status.muted::before {
            content: "—";
            background: #aeb8b2;
        }

        .table-scroll-hint {
            display: none;
            margin: 12px 2px 0;
            color: var(--ink-soft);
            font-size: .82rem;
        }

        .recommend-layout {
            display: grid;
            grid-template-columns: .9fr 1.1fr;
            gap: 30px;
        }

        .recommend-feature {
            position: relative;
            overflow: hidden;
            min-height: 510px;
            padding: 42px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            color: #fff;
            background:
                linear-gradient(180deg, rgba(11, 46, 34, .12), rgba(11, 46, 34, .95)),
                url("https://images.unsplash.com/photo-1485846234645-a62644f84728?auto=format&fit=crop&w=1100&q=85") center/cover;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
        }

        .recommend-feature::before {
            content: "";
            position: absolute;
            width: 180px;
            height: 180px;
            top: -70px;
            right: -50px;
            border: 1px solid rgba(255, 255, 255, .35);
            border-radius: 50%;
        }

        .feature-badge,
        .small-badge {
            width: fit-content;
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 7px 12px;
            border-radius: 999px;
            font-size: .76rem;
            font-weight: 900;
        }

        .feature-badge {
            color: #fff;
            background: var(--accent);
        }

        .recommend-feature h3 {
            max-width: 480px;
            margin: 0 0 15px;
            color: #fff;
            font-size: clamp(2rem, 4vw, 3.1rem);
            line-height: 1.2;
        }

        .recommend-feature p {
            max-width: 500px;
            margin-bottom: 24px;
            color: rgba(255, 255, 255, .76);
        }

        .recommend-list {
            display: grid;
            gap: 18px;
        }

        .recommend-card {
            display: grid;
            grid-template-columns: 58px 1fr auto;
            align-items: center;
            gap: 20px;
            padding: 25px;
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            box-shadow: 0 8px 22px rgba(26, 45, 37, .04);
            transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
        }

        .recommend-card:hover {
            border-color: rgba(47, 123, 97, .38);
            box-shadow: var(--shadow-sm);
            transform: translateY(-3px);
        }

        .recommend-index {
            width: 58px;
            height: 58px;
            display: grid;
            place-items: center;
            color: var(--forest);
            background: var(--mint);
            border-radius: 18px;
            font-family: Georgia, serif;
            font-size: 1.15rem;
            font-weight: 800;
        }

        .recommend-card h3 {
            margin-bottom: 5px;
            font-size: 1.13rem;
            font-family: inherit;
            font-weight: 900;
        }

        .recommend-card p {
            margin: 0;
            color: var(--ink-soft);
            font-size: .9rem;
            line-height: 1.65;
        }

        .card-arrow {
            width: 40px;
            height: 40px;
            display: grid;
            place-items: center;
            color: var(--forest);
            background: var(--paper);
            border-radius: 50%;
        }

        .card-arrow svg {
            width: 17px;
        }

        .security-grid {
            display: grid;
            grid-template-columns: 1.1fr repeat(4, 1fr);
            gap: 1px;
            overflow: hidden;
            background: rgba(255, 255, 255, .12);
            border: 1px solid rgba(255, 255, 255, .12);
            border-radius: var(--radius-lg);
        }

        .security-intro,
        .security-item {
            padding: 38px 30px;
            background: var(--forest-dark);
        }

        .security-intro {
            background: #09281e;
        }

        .security-intro h2 {
            margin-bottom: 15px;
            color: #fff;
            font-size: 2rem;
        }

        .security-intro p,
        .security-item p {
            margin: 0;
            color: rgba(255, 255, 255, .65);
            font-size: .9rem;
        }

        .security-icon {
            width: 46px;
            height: 46px;
            margin-bottom: 24px;
            display: grid;
            place-items: center;
            color: #fff;
            background: rgba(220, 235, 227, .12);
            border-radius: 15px;
        }

        .security-icon svg {
            width: 24px;
            height: 24px;
        }

        .security-item h3 {
            margin-bottom: 9px;
            color: #fff;
            font-family: inherit;
            font-size: 1.02rem;
            font-weight: 800;
        }

        .media-scroller {
            display: grid;
            grid-auto-flow: column;
            grid-auto-columns: minmax(310px, 38%);
            gap: 20px;
            overflow-x: auto;
            padding: 6px 2px 25px;
            scroll-snap-type: x mandatory;
            scrollbar-color: var(--jade) var(--paper-deep);
            scrollbar-width: thin;
        }

        .media-scroller::-webkit-scrollbar {
            height: 7px;
        }

        .media-scroller::-webkit-scrollbar-track {
            background: var(--paper-deep);
            border-radius: 10px;
        }

        .media-scroller::-webkit-scrollbar-thumb {
            background: var(--jade);
            border-radius: 10px;
        }

        .media-card {
            min-height: 305px;
            padding: 30px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            scroll-snap-align: start;
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            transition: transform var(--transition), box-shadow var(--transition);
        }

        .media-card:nth-child(2) {
            background: var(--mint);
        }

        .media-card:nth-child(3) {
            color: #fff;
            background: var(--forest);
        }

        .media-card:nth-child(4) {
            background: #f1dfd8;
        }

        .media-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-sm);
        }

        .small-badge {
            color: var(--forest);
            background: rgba(22, 77, 58, .09);
        }

        .media-card:nth-child(3) .small-badge {
            color: #fff;
            background: rgba(255, 255, 255, .12);
        }

        .media-card h3 {
            margin: 25px 0 11px;
            font-size: 1.45rem;
            line-height: 1.38;
        }

        .media-card p {
            margin: 0;
            color: var(--ink-soft);
            font-size: .92rem;
        }

        .media-card:nth-child(3) p {
            color: rgba(255, 255, 255, .72);
        }

        .media-meta {
            display: flex;
            justify-content: space-between;
            gap: 15px;
            padding-top: 22px;
            color: var(--ink-soft);
            border-top: 1px solid var(--line);
            font-size: .78rem;
            font-weight: 800;
        }

        .media-card:nth-child(3) .media-meta {
            color: rgba(255, 255, 255, .7);
            border-color: rgba(255, 255, 255, .16);
        }

        .news-layout {
            display: grid;
            grid-template-columns: 1.35fr .65fr;
            gap: 54px;
        }

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

        .news-link {
            display: grid;
            grid-template-columns: 105px 1fr auto;
            align-items: center;
            gap: 20px;
            padding: 24px 4px;
            border-bottom: 1px solid var(--line);
        }

        .news-link:hover {
            color: var(--forest);
            background: rgba(22, 77, 58, .025);
            padding-right: 10px;
            padding-left: 10px;
        }

        .news-type {
            color: var(--accent-dark);
            font-size: .76rem;
            font-weight: 900;
            letter-spacing: .08em;
        }

        .news-title {
            font-size: 1.04rem;
            font-weight: 800;
            line-height: 1.55;
        }

        .news-arrow {
            color: var(--ink-soft);
            font-size: 1.2rem;
        }

        .guide-panel {
            position: sticky;
            top: 30px;
            padding: 32px;
            color: #fff;
            background: var(--forest);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
        }

        .guide-panel h3 {
            margin-bottom: 13px;
            color: #fff;
            font-size: 1.65rem;
        }

        .guide-panel > p {
            color: rgba(255, 255, 255, .7);
            font-size: .92rem;
        }

        .step-list {
            margin: 27px 0;
            padding: 0;
            list-style: none;
        }

        .step-list li {
            display: grid;
            grid-template-columns: 34px 1fr;
            gap: 13px;
            padding: 15px 0;
            border-top: 1px solid rgba(255, 255, 255, .13);
        }

        .step-number {
            width: 28px;
            height: 28px;
            display: grid;
            place-items: center;
            color: var(--forest-dark);
            background: #fff;
            border-radius: 50%;
            font-size: .75rem;
            font-weight: 900;
        }

        .step-list strong {
            display: block;
            color: #fff;
            font-size: .92rem;
        }

        .step-list span {
            color: rgba(255, 255, 255, .64);
            font-size: .8rem;
        }

        .signup-section {
            padding: 0 0 100px;
            background: var(--surface);
        }

        .signup-card {
            position: relative;
            overflow: hidden;
            padding: 62px;
            display: grid;
            grid-template-columns: 1fr .9fr;
            align-items: center;
            gap: 60px;
            color: #fff;
            background: var(--accent);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
        }

        .signup-card::before {
            content: "";
            position: absolute;
            width: 340px;
            height: 340px;
            right: -150px;
            bottom: -200px;
            border: 60px solid rgba(255, 255, 255, .08);
            border-radius: 50%;
        }

        .signup-card h2 {
            position: relative;
            margin-bottom: 15px;
            color: #fff;
            font-size: clamp(2rem, 4vw, 3.35rem);
        }

        .signup-card p {
            position: relative;
            margin: 0;
            color: rgba(255, 255, 255, .82);
        }

        .signup-form {
            position: relative;
            padding: 9px;
            display: flex;
            gap: 8px;
            background: #fff;
            border-radius: 999px;
            box-shadow: 0 18px 45px rgba(102, 35, 18, .18);
        }

        .signup-form input {
            min-width: 0;
            flex: 1;
            padding: 13px 18px;
            color: var(--ink);
            background: transparent;
            border: 0;
        }

        .signup-form input::placeholder {
            color: #7b8782;
        }

        .signup-form button {
            flex: 0 0 auto;
            min-height: 48px;
            padding: 10px 23px;
            color: #fff;
            background: var(--forest-dark);
            border: 0;
            border-radius: 999px;
            font-weight: 900;
            transition: background var(--transition), transform var(--transition);
        }

        .signup-form button:hover {
            background: var(--forest);
            transform: translateY(-1px);
        }

        .form-message {
            min-height: 25px;
            margin: 12px 12px 0;
            color: #fff;
            font-size: .83rem;
        }

        .faq-layout {
            display: grid;
            grid-template-columns: .7fr 1.3fr;
            gap: 70px;
        }

        .faq-aside {
            position: sticky;
            top: 30px;
            align-self: start;
        }

        .faq-aside h2 {
            margin-bottom: 18px;
            font-size: clamp(2.2rem, 4vw, 3.4rem);
        }

        .faq-aside p {
            color: var(--ink-soft);
        }

        .faq-chip {
            display: inline-flex;
            margin-top: 16px;
            padding: 9px 14px;
            color: var(--forest);
            background: var(--mint);
            border-radius: 999px;
            font-size: .82rem;
            font-weight: 900;
        }

        .accordion-custom .accordion-item {
            margin-bottom: 14px;
            overflow: hidden;
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
        }

        .accordion-custom .accordion-button {
            padding: 24px 26px;
            color: var(--ink);
            background: var(--surface);
            box-shadow: none;
            font-weight: 900;
            line-height: 1.5;
        }

        .accordion-custom .accordion-button:not(.collapsed) {
            color: var(--forest);
            background: var(--mint);
        }

        .accordion-custom .accordion-button::after {
            filter: grayscale(1);
        }

        .accordion-custom .accordion-body {
            padding: 4px 26px 27px;
            color: var(--ink-soft);
            line-height: 1.9;
        }

        .site-footer {
            color: rgba(255, 255, 255, .72);
            background: #081c16;
        }

        .footer-main {
            padding: 70px 0 48px;
            display: grid;
            grid-template-columns: 1.4fr .6fr .6fr;
            gap: 60px;
        }

        .footer-brand {
            display: inline-block;
            margin-bottom: 18px;
            color: #fff;
            font-family: "Noto Serif SC", "Songti SC", serif;
            font-size: 1.65rem;
            font-weight: 800;
        }

        .footer-brand:hover {
            color: #fff;
        }

        .footer-about {
            max-width: 520px;
            margin: 0;
            color: rgba(255, 255, 255, .58);
            font-size: .91rem;
        }

        .footer-column h3 {
            margin-bottom: 17px;
            color: #fff;
            font-family: inherit;
            font-size: .84rem;
            font-weight: 900;
            letter-spacing: .08em;
        }

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

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

        .footer-links a {
            color: rgba(255, 255, 255, .66);
            font-size: .9rem;
        }

        .footer-links a:hover,
        .footer-links a.active {
            color: #fff;
        }

        .footer-bottom {
            padding: 24px 0 32px;
            display: flex;
            justify-content: space-between;
            gap: 30px;
            border-top: 1px solid rgba(255, 255, 255, .1);
            color: rgba(255, 255, 255, .46);
            font-size: .78rem;
        }

        .footer-bottom p {
            margin: 0;
        }

        .floating-cta {
            position: fixed;
            z-index: 900;
            right: 24px;
            bottom: 24px;
            display: inline-flex;
            align-items: center;
            gap: 9px;
            padding: 13px 18px;
            color: #fff;
            background: var(--forest);
            border: 1px solid rgba(255, 255, 255, .18);
            border-radius: 999px;
            box-shadow: 0 15px 40px rgba(7, 33, 24, .28);
            font-size: .86rem;
            font-weight: 900;
        }

        .floating-cta:hover {
            color: #fff;
            background: var(--accent);
            transform: translateY(-3px);
        }

        .floating-cta svg {
            width: 18px;
            height: 18px;
        }

        @media (max-width: 1024px) {
            .masthead {
                min-height: 92px;
                grid-template-columns: 1fr auto;
            }

            .masthead-note:first-child {
                display: none;
            }

            .masthead-note:last-child {
                justify-self: end;
            }

            .masthead-brand {
                justify-self: start;
            }

            .masthead-brand::before {
                display: none;
            }

            .hero {
                min-height: 650px;
            }

            .hero-grid {
                grid-template-columns: 1fr auto;
                gap: 35px;
            }

            .hero h1 {
                font-size: clamp(2.6rem, 7vw, 4.65rem);
            }

            .security-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .security-intro {
                grid-column: 1 / -1;
            }

            .recommend-layout,
            .news-layout {
                grid-template-columns: 1fr;
            }

            .recommend-feature {
                min-height: 440px;
            }

            .guide-panel {
                position: relative;
                top: auto;
            }

            .media-scroller {
                grid-auto-columns: minmax(300px, 52%);
            }

            .signup-card {
                padding: 50px;
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .faq-layout {
                grid-template-columns: 1fr;
                gap: 36px;
            }

            .faq-aside {
                position: relative;
                top: auto;
            }
        }

        @media (max-width: 768px) {
            html {
                scroll-padding-top: 85px;
            }

            .site-container {
                width: min(calc(100% - 28px), var(--container));
            }

            .site-header {
                position: sticky;
                top: 0;
            }

            .masthead {
                min-height: 74px;
            }

            .masthead-brand {
                font-family: "Noto Sans SC", "PingFang SC", sans-serif;
                font-size: 1.14rem;
                letter-spacing: -.02em;
            }

            .masthead-brand::after,
            .masthead-note {
                display: none;
            }

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

            .channel-bar {
                display: none;
            }

            .mobile-panel {
                position: fixed;
                inset: 74px 0 auto;
                padding: 16px 14px 24px;
                background: var(--surface);
                border-bottom: 1px solid var(--line);
                box-shadow: var(--shadow-lg);
            }

            .mobile-panel.open {
                display: block;
            }

            .mobile-panel a {
                display: block;
                padding: 14px 17px;
                color: var(--ink);
                border-radius: 12px;
                font-weight: 800;
            }

            .mobile-panel a + a {
                margin-top: 6px;
            }

            .mobile-panel a.active,
            .mobile-panel a:hover {
                color: var(--forest);
                background: var(--mint);
            }

            .hero {
                min-height: 700px;
                align-items: center;
            }

            .hero-media::after {
                background:
                    linear-gradient(90deg, rgba(7, 25, 19, .88), rgba(7, 25, 19, .55)),
                    linear-gradient(0deg, rgba(7, 25, 19, .9), transparent 65%);
            }

            .hero-content {
                padding: 80px 0 125px;
            }

            .hero-grid {
                grid-template-columns: 1fr;
                align-items: start;
                gap: 28px;
            }

            .hero h1 {
                font-size: clamp(2.4rem, 11vw, 4.1rem);
            }

            .play-control {
                width: 92px;
                height: 92px;
            }

            .play-control span {
                display: none;
            }

            .fact-strip {
                width: 100%;
            }

            .fact-box {
                width: 100%;
                border-radius: 0;
            }

            .fact-item {
                min-width: 0;
                flex: 1;
                padding: 14px 12px;
                text-align: center;
            }

            .section {
                padding: 76px 0;
            }

            .section-heading {
                grid-template-columns: 1fr;
                gap: 18px;
                margin-bottom: 34px;
            }

            .comparison-shell {
                overflow-x: auto;
                border-radius: var(--radius-md);
            }

            .table-scroll-hint {
                display: block;
            }

            .recommend-feature {
                min-height: 390px;
                padding: 30px;
            }

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

            .security-intro {
                grid-column: 1 / -1;
            }

            .security-intro,
            .security-item {
                padding: 28px 23px;
            }

            .media-scroller {
                grid-auto-columns: 78%;
            }

            .news-link {
                grid-template-columns: 82px 1fr auto;
                gap: 12px;
            }

            .signup-section {
                padding-bottom: 76px;
            }

            .signup-card {
                padding: 37px 28px;
            }

            .footer-main {
                grid-template-columns: 1fr 1fr;
                gap: 38px;
            }

            .footer-intro {
                grid-column: 1 / -1;
            }

            .footer-bottom {
                flex-direction: column;
                gap: 9px;
            }
        }

        @media (max-width: 520px) {
            body {
                font-size: 15px;
            }

            .hero {
                min-height: 720px;
            }

            .hero-actions {
                display: grid;
                grid-template-columns: 1fr;
            }

            .hero-actions a {
                width: 100%;
            }

            .fact-item:nth-child(3) {
                display: none;
            }

            .recommend-card {
                grid-template-columns: 50px 1fr;
                gap: 15px;
                padding: 21px;
            }

            .recommend-index {
                width: 50px;
                height: 50px;
            }

            .card-arrow {
                display: none;
            }

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

            .security-intro {
                grid-column: auto;
            }

            .media-scroller {
                grid-auto-columns: 90%;
            }

            .news-link {
                grid-template-columns: 1fr auto;
            }

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

            .signup-form {
                padding: 8px;
                display: grid;
                border-radius: 20px;
            }

            .signup-form input {
                width: 100%;
            }

            .signup-form button {
                width: 100%;
            }

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

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

            .floating-cta {
                right: 14px;
                bottom: 14px;
                padding: 12px 15px;
            }
        }

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

            *, *::before, *::after {
                scroll-behavior: auto !important;
                transition-duration: .01ms !important;
                animation-duration: .01ms !important;
                animation-iteration-count: 1 !important;
            }
        }

/* roulang page: category1 */
:root {
            --ink: #17201d;
            --ink-soft: #52605a;
            --paper: #f7f4ee;
            --paper-deep: #eee9df;
            --surface: #ffffff;
            --forest: #164d3a;
            --forest-dark: #0d3326;
            --jade: #2f7b61;
            --mint: #dcebe3;
            --accent: #df6848;
            --accent-dark: #bd4d31;
            --gold: #c99a43;
            --line: rgba(23, 32, 29, .13);
            --line-strong: rgba(23, 32, 29, .24);
            --shadow-sm: 0 10px 30px rgba(26, 45, 37, .08);
            --shadow-lg: 0 28px 70px rgba(9, 35, 26, .18);
            --radius-sm: 12px;
            --radius-md: 20px;
            --radius-lg: 32px;
            --container: 1180px;
            --transition: .25s ease;
        }

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

        html {
            scroll-behavior: smooth;
            scroll-padding-top: 110px;
        }

        body {
            margin: 0;
            color: var(--ink);
            background: var(--paper);
            font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
            font-size: 16px;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }

        body.menu-open {
            overflow: hidden;
        }

        h1, h2, h3, h4, .masthead-brand, .footer-brand {
            margin-top: 0;
            font-family: "Noto Serif SC", "Songti SC", "STSong", serif;
            letter-spacing: -.025em;
        }

        p {
            margin-top: 0;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition), background-color var(--transition), border-color var(--transition), transform var(--transition), box-shadow var(--transition);
        }

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

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

        button, input, select {
            font: inherit;
        }

        button, a, input, select {
            outline: none;
        }

        button:focus-visible,
        a:focus-visible,
        input:focus-visible,
        select:focus-visible {
            outline: 3px solid rgba(223, 104, 72, .35);
            outline-offset: 3px;
        }

        .site-container {
            width: min(calc(100% - 40px), var(--container));
            margin-inline: auto;
        }

        .site-header {
            position: relative;
            z-index: 1000;
            color: var(--ink);
            background: rgba(247, 244, 238, .96);
            border-bottom: 1px solid var(--line);
            backdrop-filter: blur(14px);
        }

        .masthead {
            min-height: 112px;
            display: grid;
            grid-template-columns: 1fr auto 1fr;
            align-items: center;
            gap: 28px;
        }

        .masthead-note {
            color: var(--ink-soft);
            font-size: .76rem;
            line-height: 1.55;
            letter-spacing: .055em;
        }

        .masthead-note:last-of-type {
            text-align: right;
        }

        .masthead-brand {
            position: relative;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--ink);
            font-size: clamp(1.5rem, 3vw, 2.45rem);
            font-weight: 800;
            line-height: 1.2;
            white-space: nowrap;
        }

        .masthead-brand:hover {
            color: var(--forest);
        }

        .masthead-brand::before,
        .masthead-brand::after {
            content: "";
            width: 44px;
            height: 1px;
            margin: 0 18px;
            background: var(--line-strong);
        }

        .channel-bar {
            height: 58px;
            background: var(--surface);
            border-top: 1px solid var(--line);
        }

        .channel-inner {
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .desktop-nav {
            display: flex;
            align-items: stretch;
            gap: 4px;
            align-self: stretch;
        }

        .nav-link-custom {
            position: relative;
            display: inline-flex;
            align-items: center;
            padding: 0 24px;
            color: var(--ink-soft);
            font-size: .94rem;
            font-weight: 700;
            letter-spacing: .04em;
        }

        .nav-link-custom::after {
            content: "";
            position: absolute;
            right: 24px;
            bottom: -1px;
            left: 24px;
            height: 3px;
            border-radius: 4px 4px 0 0;
            background: var(--accent);
            transform: scaleX(0);
            transition: transform var(--transition);
        }

        .nav-link-custom:hover,
        .nav-link-custom.active {
            color: var(--ink);
            background: rgba(22, 77, 58, .04);
        }

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

        .header-action {
            display: inline-flex;
            align-items: center;
            gap: 9px;
            color: var(--forest);
            font-size: .88rem;
            font-weight: 800;
        }

        .header-action:hover {
            color: var(--accent-dark);
            transform: translateX(3px);
        }

        .header-action svg {
            width: 18px;
            height: 18px;
        }

        .menu-toggle {
            display: none;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            color: var(--ink);
            background: transparent;
            border: 1px solid var(--line);
            border-radius: 50%;
            cursor: pointer;
        }

        .menu-toggle:hover {
            color: var(--surface);
            background: var(--forest);
            border-color: var(--forest);
        }

        .menu-toggle svg {
            width: 22px;
            height: 22px;
        }

        .mobile-panel {
            display: none;
        }

        .guide-hero {
            position: relative;
            overflow: hidden;
            color: #fff;
            background:
                radial-gradient(circle at 84% 18%, rgba(201, 154, 67, .23), transparent 24%),
                radial-gradient(circle at 60% 100%, rgba(47, 123, 97, .48), transparent 36%),
                var(--forest-dark);
        }

        .guide-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            opacity: .16;
            background-image:
                linear-gradient(rgba(255,255,255,.11) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255,255,255,.11) 1px, transparent 1px);
            background-size: 54px 54px;
            mask-image: linear-gradient(to right, transparent, #000 35%, #000);
        }

        .hero-wrap {
            position: relative;
            z-index: 1;
            min-height: 610px;
            display: grid;
            grid-template-columns: minmax(0, 1.08fr) minmax(350px, .72fr);
            align-items: center;
            gap: 76px;
            padding-top: 76px;
            padding-bottom: 76px;
        }

        .hero-kicker {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 22px;
            color: #dcefe7;
            font-size: .84rem;
            font-weight: 800;
            letter-spacing: .12em;
        }

        .hero-kicker::before {
            content: "";
            width: 34px;
            height: 2px;
            background: var(--accent);
        }

        .guide-hero h1 {
            max-width: 760px;
            margin-bottom: 24px;
            font-size: clamp(2.6rem, 5.5vw, 5.2rem);
            font-weight: 800;
            line-height: 1.08;
        }

        .hero-lead {
            max-width: 710px;
            margin-bottom: 32px;
            color: rgba(255,255,255,.78);
            font-size: clamp(1rem, 1.4vw, 1.16rem);
            line-height: 1.9;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 14px;
        }

        .btn-custom {
            min-height: 52px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            padding: 13px 23px;
            border: 1px solid transparent;
            border-radius: 999px;
            font-weight: 800;
            line-height: 1.2;
            cursor: pointer;
            transition: transform var(--transition), box-shadow var(--transition), background-color var(--transition), border-color var(--transition), color var(--transition);
        }

        .btn-custom svg {
            width: 18px;
            height: 18px;
        }

        .btn-accent {
            color: #fff;
            background: var(--accent);
            box-shadow: 0 12px 30px rgba(223, 104, 72, .28);
        }

        .btn-accent:hover {
            color: #fff;
            background: var(--accent-dark);
            box-shadow: 0 16px 36px rgba(223, 104, 72, .36);
            transform: translateY(-2px);
        }

        .btn-light-outline {
            color: #fff;
            background: rgba(255,255,255,.06);
            border-color: rgba(255,255,255,.32);
        }

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

        .hero-note {
            margin: 18px 0 0;
            color: rgba(255,255,255,.58);
            font-size: .82rem;
        }

        .hero-panel {
            position: relative;
            padding: 28px;
            color: var(--ink);
            background: rgba(255,255,255,.96);
            border: 1px solid rgba(255,255,255,.44);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
        }

        .burst-badge {
            position: absolute;
            top: -27px;
            right: -22px;
            width: 108px;
            height: 108px;
            display: grid;
            place-items: center;
            padding: 15px;
            color: var(--forest-dark);
            background: var(--gold);
            clip-path: polygon(50% 0%, 61% 14%, 78% 7%, 84% 24%, 100% 27%, 92% 45%, 100% 59%, 83% 68%, 82% 87%, 62% 84%, 50% 100%, 38% 84%, 18% 88%, 17% 68%, 0 59%, 9% 44%, 0 27%, 18% 23%, 23% 6%, 40% 14%);
            font-size: .85rem;
            font-weight: 900;
            line-height: 1.35;
            text-align: center;
            transform: rotate(7deg);
        }

        .panel-label {
            margin-bottom: 9px;
            color: var(--accent-dark);
            font-size: .77rem;
            font-weight: 900;
            letter-spacing: .11em;
        }

        .hero-panel h2 {
            margin-bottom: 21px;
            font-size: 1.55rem;
            font-weight: 800;
        }

        .check-list {
            display: grid;
            gap: 12px;
            margin: 0;
            padding: 0;
            list-style: none;
        }

        .check-item {
            display: grid;
            grid-template-columns: 38px 1fr;
            gap: 12px;
            align-items: center;
            padding: 13px;
            background: var(--paper);
            border: 1px solid var(--line);
            border-radius: var(--radius-sm);
        }

        .check-num {
            width: 38px;
            height: 38px;
            display: grid;
            place-items: center;
            color: #fff;
            background: var(--forest);
            border-radius: 50%;
            font-size: .82rem;
            font-weight: 900;
        }

        .check-copy strong {
            display: block;
            font-size: .94rem;
        }

        .check-copy span {
            display: block;
            margin-top: 1px;
            color: var(--ink-soft);
            font-size: .78rem;
        }

        .panel-deadline {
            display: flex;
            align-items: center;
            gap: 9px;
            margin: 18px 0 0;
            padding-top: 17px;
            color: var(--forest);
            border-top: 1px solid var(--line);
            font-size: .84rem;
            font-weight: 800;
        }

        .panel-deadline svg {
            width: 17px;
            height: 17px;
        }

        .section {
            padding: 96px 0;
        }

        .section-tight {
            padding: 72px 0;
        }

        .section-white {
            background: var(--surface);
        }

        .section-dark {
            color: #fff;
            background: var(--forest-dark);
        }

        .section-heading {
            max-width: 760px;
            margin-bottom: 42px;
        }

        .section-heading.wide {
            max-width: 900px;
        }

        .section-heading .overline {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 13px;
            color: var(--accent-dark);
            font-size: .8rem;
            font-weight: 900;
            letter-spacing: .12em;
        }

        .section-heading .overline::before {
            content: "";
            width: 26px;
            height: 2px;
            background: currentColor;
        }

        .section-dark .section-heading .overline {
            color: #ef987f;
        }

        .section-heading h2 {
            margin-bottom: 17px;
            font-size: clamp(2rem, 4vw, 3.35rem);
            font-weight: 800;
            line-height: 1.2;
        }

        .section-heading p {
            margin-bottom: 0;
            color: var(--ink-soft);
            font-size: 1.04rem;
        }

        .section-dark .section-heading p {
            color: rgba(255,255,255,.68);
        }

        .service-layout {
            display: grid;
            grid-template-columns: minmax(0, 1.12fr) minmax(290px, .58fr);
            gap: 30px;
        }

        .service-stack {
            display: grid;
            gap: 14px;
        }

        .service-row {
            display: grid;
            grid-template-columns: 54px 1fr auto;
            gap: 19px;
            align-items: center;
            padding: 22px;
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            box-shadow: 0 0 0 rgba(0,0,0,0);
            transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
        }

        .service-row:hover {
            border-color: rgba(47, 123, 97, .35);
            box-shadow: var(--shadow-sm);
            transform: translateX(5px);
        }

        .service-icon {
            width: 54px;
            height: 54px;
            display: grid;
            place-items: center;
            color: var(--forest);
            background: var(--mint);
            border-radius: 18px;
        }

        .service-icon svg {
            width: 25px;
            height: 25px;
        }

        .service-copy h3 {
            margin-bottom: 4px;
            font-size: 1.16rem;
            font-weight: 800;
        }

        .service-copy p {
            margin: 0;
            color: var(--ink-soft);
            font-size: .91rem;
        }

        .service-tag {
            padding: 6px 10px;
            color: var(--forest);
            background: var(--mint);
            border-radius: 999px;
            font-size: .74rem;
            font-weight: 800;
            white-space: nowrap;
        }

        .summary-card {
            height: 100%;
            padding: 30px;
            color: #fff;
            background: var(--forest);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
        }

        .summary-card h3 {
            margin-bottom: 15px;
            font-size: 1.55rem;
            font-weight: 800;
        }

        .summary-card > p {
            color: rgba(255,255,255,.7);
        }

        .summary-list {
            margin: 24px 0 0;
            padding: 0;
            list-style: none;
            border-top: 1px solid rgba(255,255,255,.16);
        }

        .summary-list li {
            display: flex;
            justify-content: space-between;
            gap: 16px;
            padding: 15px 0;
            border-bottom: 1px solid rgba(255,255,255,.13);
            font-size: .9rem;
        }

        .summary-list strong {
            color: #fff;
        }

        .summary-list span {
            color: rgba(255,255,255,.65);
            text-align: right;
        }

        .metrics-wrap {
            display: grid;
            grid-template-columns: .9fr 1.1fr;
            gap: 55px;
            align-items: center;
        }

        .metrics-copy h2 {
            margin-bottom: 20px;
            font-size: clamp(2rem, 4vw, 3.25rem);
            font-weight: 800;
        }

        .metrics-copy p {
            color: var(--ink-soft);
        }

        .trust-note {
            margin-top: 25px;
            padding: 18px 20px;
            background: var(--mint);
            border-left: 4px solid var(--jade);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            font-size: .9rem;
        }

        .metric-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
        }

        .metric-card {
            min-height: 190px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            padding: 26px;
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition), border-color var(--transition);
        }

        .metric-card:nth-child(2) {
            background: var(--paper-deep);
            transform: translateY(26px);
        }

        .metric-card:nth-child(3) {
            color: #fff;
            background: var(--forest);
        }

        .metric-card:nth-child(4) {
            transform: translateY(26px);
        }

        .metric-card:hover {
            border-color: var(--jade);
            transform: translateY(-4px);
        }

        .metric-card:nth-child(2):hover,
        .metric-card:nth-child(4):hover {
            transform: translateY(20px);
        }

        .metric-value {
            font-family: "Noto Serif SC", "Songti SC", serif;
            font-size: 3rem;
            font-weight: 900;
            line-height: 1;
        }

        .metric-card p {
            margin: 18px 0 0;
            color: var(--ink-soft);
            font-size: .9rem;
        }

        .metric-card:nth-child(3) p {
            color: rgba(255,255,255,.68);
        }

        .scenario-tabs {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 28px;
        }

        .scenario-tab {
            padding: 10px 17px;
            color: var(--ink-soft);
            background: transparent;
            border: 1px solid var(--line-strong);
            border-radius: 999px;
            font-weight: 800;
            cursor: pointer;
            transition: all var(--transition);
        }

        .scenario-tab:hover,
        .scenario-tab.active {
            color: #fff;
            background: var(--forest);
            border-color: var(--forest);
        }

        .scenario-display {
            display: grid;
            grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr);
            overflow: hidden;
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
        }

        .scenario-visual {
            min-height: 390px;
            display: grid;
            place-items: center;
            padding: 48px;
            background:
                radial-gradient(circle at 20% 25%, rgba(223,104,72,.24), transparent 28%),
                linear-gradient(145deg, var(--forest), var(--forest-dark));
        }

        .device-art {
            width: min(100%, 310px);
            padding: 14px;
            background: #111b18;
            border: 1px solid rgba(255,255,255,.2);
            border-radius: 24px;
            box-shadow: 0 28px 50px rgba(0,0,0,.3);
        }

        .device-screen {
            aspect-ratio: 16 / 10;
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            padding: 17px;
            background:
                linear-gradient(0deg, rgba(0,0,0,.78), transparent 65%),
                linear-gradient(135deg, #467262, #a5bdad);
            border-radius: 14px;
        }

        .subtitle-line {
            width: 88%;
            height: 9px;
            margin: 4px auto;
            background: rgba(255,255,255,.9);
            border-radius: 999px;
            box-shadow: 0 1px 4px rgba(0,0,0,.5);
        }

        .subtitle-line.short {
            width: 62%;
        }

        .scenario-content {
            padding: 52px;
        }

        .scenario-content h3 {
            margin-bottom: 17px;
            font-size: 2rem;
            font-weight: 800;
        }

        .scenario-content > p {
            color: var(--ink-soft);
        }

        .detail-list {
            display: grid;
            gap: 13px;
            margin: 26px 0 0;
            padding: 0;
            list-style: none;
        }

        .detail-list li {
            display: grid;
            grid-template-columns: 24px 1fr;
            gap: 12px;
            align-items: start;
        }

        .detail-list svg {
            width: 21px;
            height: 21px;
            margin-top: 3px;
            color: var(--jade);
        }

        .detail-list strong {
            display: block;
            margin-bottom: 2px;
        }

        .detail-list span {
            display: block;
            color: var(--ink-soft);
            font-size: .88rem;
        }

        .process-layout {
            display: grid;
            grid-template-columns: minmax(0, 1fr) 330px;
            gap: 58px;
            align-items: start;
        }

        .process-list {
            position: relative;
            margin: 0;
            padding: 0;
            list-style: none;
        }

        .process-list::before {
            content: "";
            position: absolute;
            top: 28px;
            bottom: 28px;
            left: 27px;
            width: 1px;
            background: rgba(255,255,255,.2);
        }

        .process-item {
            position: relative;
            display: grid;
            grid-template-columns: 56px 1fr;
            gap: 20px;
            padding-bottom: 31px;
        }

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

        .process-number {
            position: relative;
            z-index: 1;
            width: 56px;
            height: 56px;
            display: grid;
            place-items: center;
            color: var(--forest-dark);
            background: var(--gold);
            border: 7px solid var(--forest-dark);
            border-radius: 50%;
            font-weight: 900;
        }

        .process-copy {
            padding-top: 8px;
        }

        .process-copy h3 {
            margin-bottom: 7px;
            font-size: 1.3rem;
            font-weight: 800;
        }

        .process-copy p {
            margin: 0;
            color: rgba(255,255,255,.64);
        }

        .security-card {
            position: sticky;
            top: 28px;
            padding: 28px;
            color: var(--ink);
            background: var(--paper);
            border-radius: var(--radius-md);
        }

        .security-icon {
            width: 54px;
            height: 54px;
            display: grid;
            place-items: center;
            margin-bottom: 20px;
            color: #fff;
            background: var(--accent);
            border-radius: 18px;
        }

        .security-icon svg {
            width: 26px;
            height: 26px;
        }

        .security-card h3 {
            margin-bottom: 11px;
            font-size: 1.35rem;
            font-weight: 800;
        }

        .security-card p {
            color: var(--ink-soft);
            font-size: .9rem;
        }

        .security-card ul {
            margin: 18px 0 0;
            padding-left: 20px;
            color: var(--ink-soft);
            font-size: .88rem;
        }

        .security-card li + li {
            margin-top: 8px;
        }

        .faq-layout {
            display: grid;
            grid-template-columns: 300px minmax(0, 1fr);
            gap: 56px;
            align-items: start;
        }

        .faq-aside {
            position: sticky;
            top: 30px;
        }

        .faq-aside h2 {
            margin-bottom: 16px;
            font-size: 2.45rem;
            font-weight: 800;
        }

        .faq-aside p {
            color: var(--ink-soft);
        }

        .faq-marker {
            display: inline-flex;
            margin-top: 12px;
            padding: 7px 12px;
            color: var(--forest);
            background: var(--mint);
            border-radius: 999px;
            font-size: .78rem;
            font-weight: 800;
        }

        .accordion-custom {
            display: grid;
            gap: 12px;
        }

        .accordion-custom .accordion-item {
            overflow: hidden;
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
        }

        .accordion-custom .accordion-button {
            padding: 22px 24px;
            color: var(--ink);
            background: var(--surface);
            box-shadow: none;
            font-family: "Noto Serif SC", "Songti SC", serif;
            font-size: 1.08rem;
            font-weight: 800;
        }

        .accordion-custom .accordion-button:not(.collapsed) {
            color: var(--forest);
            background: var(--mint);
        }

        .accordion-custom .accordion-button::after {
            filter: grayscale(1);
        }

        .accordion-custom .accordion-body {
            padding: 4px 24px 24px;
            color: var(--ink-soft);
        }

        .quick-start {
            padding: 0 0 96px;
        }

        .cta-shell {
            position: relative;
            overflow: hidden;
            display: grid;
            grid-template-columns: minmax(0, 1fr) 390px;
            gap: 50px;
            align-items: center;
            padding: 54px;
            color: #fff;
            background: var(--forest);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
        }

        .cta-shell::after {
            content: "";
            position: absolute;
            right: -100px;
            bottom: -160px;
            width: 420px;
            height: 420px;
            border: 70px solid rgba(255,255,255,.05);
            border-radius: 50%;
        }

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

        .cta-copy .label {
            display: inline-flex;
            margin-bottom: 16px;
            padding: 6px 11px;
            color: #ffe9df;
            background: rgba(223,104,72,.2);
            border: 1px solid rgba(255,255,255,.16);
            border-radius: 999px;
            font-size: .76rem;
            font-weight: 900;
        }

        .cta-copy h2 {
            margin-bottom: 16px;
            font-size: clamp(2rem, 4vw, 3.2rem);
            font-weight: 800;
        }

        .cta-copy p {
            margin: 0;
            color: rgba(255,255,255,.68);
        }

        .finder {
            position: relative;
            z-index: 1;
            padding: 25px;
            color: var(--ink);
            background: var(--surface);
            border-radius: var(--radius-md);
        }

        .finder label {
            display: block;
            margin-bottom: 8px;
            font-size: .82rem;
            font-weight: 900;
        }

        .finder select {
            width: 100%;
            min-height: 48px;
            padding: 10px 40px 10px 13px;
            color: var(--ink);
            background-color: var(--paper);
            border: 1px solid var(--line-strong);
            border-radius: var(--radius-sm);
        }

        .finder select:focus {
            border-color: var(--jade);
            box-shadow: 0 0 0 4px rgba(47,123,97,.12);
        }

        .finder .btn-custom {
            width: 100%;
            margin-top: 15px;
            border: 0;
        }

        .finder-result {
            min-height: 49px;
            margin: 15px 0 0;
            padding: 12px 14px;
            color: var(--forest);
            background: var(--mint);
            border-radius: var(--radius-sm);
            font-size: .84rem;
            font-weight: 700;
        }

        .site-footer {
            color: rgba(255,255,255,.72);
            background: #0a271d;
        }

        .footer-main {
            display: grid;
            grid-template-columns: minmax(0, 1.6fr) .7fr .7fr;
            gap: 70px;
            padding-top: 72px;
            padding-bottom: 58px;
        }

        .footer-brand {
            display: inline-block;
            margin-bottom: 17px;
            color: #fff;
            font-size: 1.55rem;
            font-weight: 800;
        }

        .footer-brand:hover {
            color: #ef987f;
        }

        .footer-about {
            max-width: 580px;
            margin: 0;
            color: rgba(255,255,255,.57);
            font-size: .9rem;
        }

        .footer-column h3 {
            margin-bottom: 17px;
            color: #fff;
            font-family: inherit;
            font-size: .9rem;
            font-weight: 900;
            letter-spacing: .08em;
        }

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

        .footer-links li + li {
            margin-top: 9px;
        }

        .footer-links a {
            color: rgba(255,255,255,.58);
            font-size: .88rem;
        }

        .footer-links a:hover,
        .footer-links a.active {
            color: #fff;
        }

        .footer-bottom {
            min-height: 70px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 25px;
            border-top: 1px solid rgba(255,255,255,.1);
        }

        .footer-bottom p {
            margin: 0;
            color: rgba(255,255,255,.45);
            font-size: .78rem;
        }

        @media (max-width: 1024px) {
            .masthead {
                grid-template-columns: 1fr auto;
                min-height: 90px;
            }

            .masthead-note {
                display: none;
            }

            .masthead-brand {
                justify-self: start;
            }

            .masthead-brand::before {
                display: none;
            }

            .masthead-brand::after {
                width: 34px;
                margin-left: 14px;
            }

            .hero-wrap {
                grid-template-columns: minmax(0, 1fr) 350px;
                gap: 40px;
            }

            .guide-hero h1 {
                font-size: clamp(2.6rem, 6vw, 4.2rem);
            }

            .service-layout,
            .metrics-wrap {
                gap: 30px;
            }

            .process-layout {
                grid-template-columns: minmax(0, 1fr) 300px;
                gap: 35px;
            }

            .cta-shell {
                grid-template-columns: minmax(0, 1fr) 340px;
                padding: 42px;
            }
        }

        @media (max-width: 768px) {
            .site-container {
                width: min(calc(100% - 28px), var(--container));
            }

            .masthead {
                min-height: 76px;
            }

            .masthead-brand {
                font-size: 1.35rem;
                white-space: normal;
            }

            .masthead-brand::after {
                display: none;
            }

            .menu-toggle {
                display: inline-flex;
                justify-self: end;
            }

            .channel-bar {
                display: none;
            }

            .mobile-panel {
                position: absolute;
                top: 76px;
                right: 0;
                left: 0;
                display: grid;
                gap: 7px;
                max-height: 0;
                overflow: hidden;
                padding: 0 14px;
                visibility: hidden;
                opacity: 0;
                background: var(--paper);
                border-bottom: 1px solid var(--line);
                transition: max-height .3s ease, padding .3s ease, opacity .2s ease, visibility .2s;
            }

            .mobile-panel.open {
                max-height: 260px;
                padding: 14px;
                visibility: visible;
                opacity: 1;
                box-shadow: var(--shadow-sm);
            }

            .mobile-panel a {
                padding: 12px 15px;
                color: var(--ink-soft);
                border-radius: var(--radius-sm);
                font-weight: 800;
            }

            .mobile-panel a:hover,
            .mobile-panel a.active {
                color: var(--forest);
                background: var(--mint);
            }

            .hero-wrap {
                min-height: auto;
                grid-template-columns: 1fr;
                gap: 56px;
                padding-top: 68px;
                padding-bottom: 64px;
            }

            .guide-hero h1 {
                font-size: clamp(2.45rem, 11vw, 4rem);
            }

            .hero-panel {
                max-width: 560px;
            }

            .section {
                padding: 72px 0;
            }

            .section-tight {
                padding: 62px 0;
            }

            .service-layout,
            .metrics-wrap,
            .scenario-display,
            .process-layout,
            .faq-layout,
            .cta-shell,
            .footer-main {
                grid-template-columns: 1fr;
            }

            .service-row {
                grid-template-columns: 50px 1fr;
            }

            .service-tag {
                grid-column: 2;
                justify-self: start;
            }

            .metrics-copy {
                max-width: 650px;
            }

            .metric-card:nth-child(2),
            .metric-card:nth-child(4) {
                transform: none;
            }

            .metric-card:nth-child(2):hover,
            .metric-card:nth-child(4):hover {
                transform: translateY(-4px);
            }

            .scenario-visual {
                min-height: 300px;
            }

            .scenario-content {
                padding: 36px;
            }

            .security-card,
            .faq-aside {
                position: static;
            }

            .faq-layout {
                gap: 28px;
            }

            .cta-shell {
                gap: 30px;
            }

            .footer-main {
                gap: 36px;
            }
        }

        @media (max-width: 520px) {
            body {
                font-size: 15px;
            }

            .site-container {
                width: min(calc(100% - 22px), var(--container));
            }

            .masthead-brand {
                max-width: 245px;
                font-size: 1.18rem;
            }

            .guide-hero h1 {
                font-size: 2.55rem;
            }

            .hero-lead {
                line-height: 1.75;
            }

            .hero-actions {
                align-items: stretch;
                flex-direction: column;
            }

            .btn-custom {
                width: 100%;
            }

            .hero-panel {
                padding: 22px;
                border-radius: var(--radius-md);
            }

            .burst-badge {
                top: -32px;
                right: -7px;
                width: 91px;
                height: 91px;
                font-size: .72rem;
            }

            .section {
                padding: 60px 0;
            }

            .section-heading {
                margin-bottom: 29px;
            }

            .section-heading h2 {
                font-size: 2rem;
            }

            .service-row {
                padding: 17px;
            }

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

            .metric-card {
                min-height: 155px;
            }

            .scenario-tabs {
                flex-wrap: nowrap;
                overflow-x: auto;
                padding-bottom: 6px;
            }

            .scenario-tab {
                flex: 0 0 auto;
            }

            .scenario-visual {
                min-height: 245px;
                padding: 30px;
            }

            .scenario-content {
                padding: 27px 22px;
            }

            .scenario-content h3 {
                font-size: 1.6rem;
            }

            .process-item {
                grid-template-columns: 48px 1fr;
                gap: 15px;
            }

            .process-list::before {
                left: 23px;
            }

            .process-number {
                width: 48px;
                height: 48px;
                border-width: 6px;
            }

            .accordion-custom .accordion-button {
                padding: 19px;
                font-size: 1rem;
            }

            .accordion-custom .accordion-body {
                padding: 2px 19px 20px;
            }

            .quick-start {
                padding-bottom: 60px;
            }

            .cta-shell {
                padding: 30px 20px;
                border-radius: var(--radius-md);
            }

            .finder {
                padding: 20px;
            }

            .footer-main {
                padding-top: 54px;
                padding-bottom: 42px;
            }

            .footer-bottom {
                align-items: flex-start;
                flex-direction: column;
                justify-content: center;
                padding: 19px 0;
            }
        }