/* roulang page: index */
:root {
            --primary: #3559e8;
            --primary-dark: #243fbd;
            --primary-soft: #eef2ff;
            --secondary: #18a67e;
            --secondary-soft: #e9faf4;
            --accent: #f0a525;
            --danger: #d94b62;
            --ink: #182035;
            --muted: #64708a;
            --surface: #ffffff;
            --surface-alt: #f5f7fc;
            --surface-deep: #11192d;
            --border: #dfe5f0;
            --border-strong: #cbd5e4;
            --radius-sm: 10px;
            --radius-md: 18px;
            --radius-lg: 28px;
            --shadow-sm: 0 8px 24px rgba(27, 40, 77, .07);
            --shadow-md: 0 18px 50px rgba(27, 40, 77, .12);
            --shadow-lg: 0 28px 80px rgba(20, 31, 68, .17);
            --section-space: clamp(4.5rem, 8vw, 7.5rem);
            --transition: 180ms ease;
        }

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

        html {
            scroll-behavior: smooth;
            scroll-padding-top: 100px;
        }

        body {
            margin: 0;
            color: var(--ink);
            background: var(--surface);
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
            font-size: 16px;
            line-height: 1.8;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

        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(--primary);
        }

        button, input {
            font: inherit;
        }

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

        button:focus-visible,
        input:focus-visible,
        a:focus-visible {
            outline: 3px solid rgba(53, 89, 232, .28);
            outline-offset: 3px;
        }

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

        p:last-child {
            margin-bottom: 0;
        }

        .container {
            width: min(1180px, calc(100% - 40px));
            max-width: none;
            margin-inline: auto;
            padding-inline: 0;
        }

        .announcement {
            position: relative;
            z-index: 1040;
            color: #fff;
            background: var(--surface-deep);
            border-bottom: 1px solid rgba(255,255,255,.1);
        }

        .announcement-inner {
            min-height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 18px;
            font-size: .88rem;
            letter-spacing: .02em;
        }

        .announcement-label {
            color: #b9c6ff;
            font-weight: 700;
        }

        .countdown {
            display: flex;
            align-items: center;
            gap: 6px;
            font-variant-numeric: tabular-nums;
        }

        .countdown strong {
            min-width: 32px;
            padding: 2px 7px;
            color: #fff;
            text-align: center;
            background: rgba(255,255,255,.12);
            border: 1px solid rgba(255,255,255,.15);
            border-radius: 7px;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: rgba(255,255,255,.9);
            border-bottom: 1px solid rgba(223,229,240,.85);
            box-shadow: 0 5px 20px rgba(24,32,53,.04);
            backdrop-filter: blur(16px);
        }

        .navbar {
            min-height: 76px;
            padding: 10px 0;
        }

        .navbar-brand {
            display: inline-flex;
            align-items: center;
            gap: 11px;
            max-width: 510px;
            margin-right: 2rem;
            color: var(--ink);
            font-size: 1.04rem;
            font-weight: 800;
            line-height: 1.3;
            white-space: normal;
        }

        .brand-mark {
            width: 40px;
            height: 40px;
            flex: 0 0 40px;
            display: grid;
            place-items: center;
            color: #fff;
            background: linear-gradient(145deg, var(--primary), #7c5ce7);
            border-radius: 13px;
            box-shadow: 0 10px 22px rgba(53,89,232,.25);
        }

        .brand-mark svg {
            width: 21px;
            height: 21px;
        }

        .navbar-toggler {
            padding: .55rem .65rem;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            box-shadow: none !important;
        }

        .navbar-toggler-icon {
            width: 1.25em;
            height: 1.25em;
        }

        .navbar-nav {
            gap: 8px;
        }

        .navbar .nav-link {
            position: relative;
            padding: .62rem 1rem !important;
            color: var(--muted);
            border-radius: 10px;
            font-weight: 700;
        }

        .navbar .nav-link:hover {
            color: var(--primary);
            background: var(--primary-soft);
        }

        .navbar .nav-link.active {
            color: var(--primary);
            background: var(--primary-soft);
        }

        .navbar .nav-link.active::after {
            content: "";
            position: absolute;
            left: 30%;
            right: 30%;
            bottom: 4px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }

        main {
            display: block;
        }

        section {
            position: relative;
            padding: var(--section-space) 0;
        }

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

        .section-dark {
            color: #fff;
            background:
                radial-gradient(circle at 85% 15%, rgba(74,100,232,.25), transparent 32%),
                radial-gradient(circle at 10% 90%, rgba(24,166,126,.16), transparent 32%),
                var(--surface-deep);
        }

        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 16px;
            color: var(--primary);
            font-size: .86rem;
            font-weight: 800;
            letter-spacing: .08em;
        }

        .eyebrow::before {
            content: "";
            width: 26px;
            height: 3px;
            background: currentColor;
            border-radius: 3px;
        }

        .section-dark .eyebrow {
            color: #9eafff;
        }

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

        .section-head.split {
            max-width: none;
            display: grid;
            grid-template-columns: minmax(0, .8fr) minmax(360px, 1fr);
            align-items: end;
            gap: 70px;
        }

        .section-title {
            margin: 0;
            color: var(--ink);
            font-size: clamp(1.9rem, 3.8vw, 3rem);
            line-height: 1.24;
            font-weight: 850;
            letter-spacing: -.035em;
        }

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

        .section-desc {
            margin-top: 17px;
            color: var(--muted);
            font-size: 1.03rem;
            line-height: 1.9;
        }

        .section-dark .section-desc {
            color: #b9c2d8;
        }

        .hero {
            min-height: 720px;
            display: flex;
            align-items: center;
            padding: clamp(4.5rem, 8vw, 7.5rem) 0;
            overflow: hidden;
            background:
                radial-gradient(circle at 12% 8%, rgba(53,89,232,.14), transparent 27%),
                radial-gradient(circle at 91% 74%, rgba(24,166,126,.12), transparent 26%),
                linear-gradient(180deg, #fbfcff 0%, #f5f7fd 100%);
        }

        .hero::before {
            content: "";
            position: absolute;
            inset: 0;
            opacity: .38;
            pointer-events: none;
            background-image:
                linear-gradient(rgba(53,89,232,.06) 1px, transparent 1px),
                linear-gradient(90deg, rgba(53,89,232,.06) 1px, transparent 1px);
            background-size: 46px 46px;
            mask-image: linear-gradient(to bottom, #000, transparent 83%);
        }

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

        .hero-copy {
            max-width: 940px;
            margin-bottom: 42px;
        }

        .hero-kicker {
            display: inline-flex;
            align-items: center;
            gap: 9px;
            margin-bottom: 20px;
            padding: 7px 13px;
            color: var(--primary-dark);
            background: rgba(255,255,255,.8);
            border: 1px solid rgba(53,89,232,.18);
            border-radius: 999px;
            box-shadow: var(--shadow-sm);
            font-size: .86rem;
            font-weight: 800;
        }

        .hero-kicker-dot {
            width: 8px;
            height: 8px;
            background: var(--secondary);
            border-radius: 50%;
            box-shadow: 0 0 0 5px rgba(24,166,126,.12);
        }

        .hero h1 {
            max-width: 1000px;
            margin: 0;
            color: var(--ink);
            font-size: clamp(2.45rem, 6.4vw, 5.35rem);
            line-height: 1.08;
            font-weight: 900;
            letter-spacing: -.06em;
            text-wrap: balance;
        }

        .hero-lead {
            max-width: 890px;
            margin: 25px 0 0;
            color: #536078;
            font-size: clamp(1rem, 1.8vw, 1.16rem);
            line-height: 2;
        }

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

        .btn {
            min-height: 48px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 9px;
            padding: .78rem 1.25rem;
            border-radius: 12px;
            font-weight: 800;
            transition: transform var(--transition), box-shadow var(--transition), background-color var(--transition), border-color var(--transition);
        }

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

        .btn-primary {
            color: #fff;
            background: var(--primary);
            border-color: var(--primary);
            box-shadow: 0 12px 28px rgba(53,89,232,.25);
        }

        .btn-primary:hover,
        .btn-primary:active {
            color: #fff !important;
            background: var(--primary-dark) !important;
            border-color: var(--primary-dark) !important;
            box-shadow: 0 16px 32px rgba(53,89,232,.3);
        }

        .btn-outline-custom {
            color: var(--ink);
            background: rgba(255,255,255,.82);
            border: 1px solid var(--border-strong);
        }

        .btn-outline-custom:hover {
            color: var(--primary);
            background: #fff;
            border-color: rgba(53,89,232,.45);
            box-shadow: var(--shadow-sm);
        }

        .comparison-stage {
            display: grid;
            grid-template-columns: 1fr 64px 1fr;
            align-items: stretch;
            gap: 0;
            padding: 12px;
            background: rgba(255,255,255,.82);
            border: 1px solid rgba(203,213,228,.82);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
            backdrop-filter: blur(12px);
        }

        .comparison-panel {
            position: relative;
            min-height: 250px;
            padding: 30px;
            overflow: hidden;
            border-radius: 20px;
        }

        .comparison-panel.before {
            background: #f5f6f9;
            border: 1px solid #e2e6ed;
        }

        .comparison-panel.after {
            color: #fff;
            background:
                radial-gradient(circle at 90% 10%, rgba(255,255,255,.17), transparent 30%),
                linear-gradient(145deg, #314fd0, #263f9f 58%, #182b75);
        }

        .comparison-label {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            margin-bottom: 21px;
            padding: 5px 10px;
            border-radius: 999px;
            font-size: .78rem;
            font-weight: 800;
        }

        .before .comparison-label {
            color: #6b7281;
            background: #e7e9ee;
        }

        .after .comparison-label {
            color: #fff;
            background: rgba(255,255,255,.15);
            border: 1px solid rgba(255,255,255,.16);
        }

        .comparison-panel h2 {
            margin: 0 0 12px;
            font-size: clamp(1.25rem, 2.5vw, 1.65rem);
            line-height: 1.35;
            font-weight: 850;
        }

        .comparison-panel p {
            margin: 0 0 18px;
            color: #687187;
            font-size: .94rem;
            line-height: 1.8;
        }

        .after p {
            color: #dce3ff;
        }

        .mini-list {
            display: grid;
            gap: 10px;
            margin: 0;
            padding: 0;
            list-style: none;
        }

        .mini-list li {
            display: flex;
            align-items: flex-start;
            gap: 9px;
            color: #596277;
            font-size: .9rem;
        }

        .after .mini-list li {
            color: #fff;
        }

        .list-icon {
            width: 20px;
            height: 20px;
            flex: 0 0 20px;
            display: grid;
            place-items: center;
            margin-top: 4px;
            color: var(--primary);
            background: #fff;
            border-radius: 50%;
            font-size: .7rem;
            font-weight: 900;
        }

        .before .list-icon {
            color: #8b93a3;
            background: #e3e6ec;
        }

        .comparison-arrow {
            position: relative;
            z-index: 2;
            align-self: center;
            justify-self: center;
            width: 50px;
            height: 50px;
            display: grid;
            place-items: center;
            margin: 0 -7px;
            color: #fff;
            background: var(--secondary);
            border: 6px solid #fff;
            border-radius: 50%;
            box-shadow: 0 9px 24px rgba(24,166,126,.28);
            font-size: 1.2rem;
            font-weight: 900;
        }

        .kpi-board {
            margin-top: -44px;
            padding-top: 0;
            z-index: 2;
        }

        .kpi-shell {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-md);
            overflow: hidden;
        }

        .kpi-item {
            min-height: 154px;
            padding: 28px;
            border-right: 1px solid var(--border);
        }

        .kpi-item:last-child {
            border-right: 0;
        }

        .kpi-number {
            display: block;
            color: var(--primary);
            font-size: clamp(1.8rem, 3vw, 2.55rem);
            line-height: 1.15;
            font-weight: 900;
            letter-spacing: -.04em;
        }

        .kpi-label {
            display: block;
            margin-top: 7px;
            color: var(--ink);
            font-weight: 800;
        }

        .kpi-note {
            margin-top: 5px;
            color: var(--muted);
            font-size: .82rem;
            line-height: 1.55;
        }

        .service-layout {
            display: grid;
            grid-template-columns: .82fr 1.18fr;
            gap: 70px;
            align-items: start;
        }

        .service-intro {
            position: sticky;
            top: 118px;
        }

        .service-stack {
            display: grid;
            gap: 15px;
        }

        .service-item {
            display: grid;
            grid-template-columns: 58px 1fr auto;
            gap: 18px;
            align-items: center;
            padding: 24px;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            box-shadow: 0 8px 28px rgba(26,39,75,.05);
            transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
        }

        .service-item:hover {
            transform: translateX(5px);
            border-color: rgba(53,89,232,.35);
            box-shadow: var(--shadow-md);
        }

        .service-icon {
            width: 58px;
            height: 58px;
            display: grid;
            place-items: center;
            color: var(--primary);
            background: var(--primary-soft);
            border-radius: 16px;
        }

        .service-icon svg {
            width: 27px;
            height: 27px;
        }

        .service-item:nth-child(2) .service-icon,
        .service-item:nth-child(5) .service-icon {
            color: var(--secondary);
            background: var(--secondary-soft);
        }

        .service-item h3 {
            margin: 0 0 5px;
            font-size: 1.08rem;
            font-weight: 850;
        }

        .service-item p {
            margin: 0;
            color: var(--muted);
            font-size: .9rem;
            line-height: 1.7;
        }

        .service-index {
            color: #a7afbf;
            font-size: .82rem;
            font-weight: 800;
        }

        .result-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 22px;
        }

        .result-card {
            position: relative;
            padding: 34px;
            overflow: hidden;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
        }

        .result-card.safe {
            color: #fff;
            background: var(--surface-deep);
            border-color: var(--surface-deep);
        }

        .result-card h3 {
            margin: 0 0 20px;
            font-size: 1.4rem;
            font-weight: 850;
        }

        .result-card ul {
            display: grid;
            gap: 14px;
            margin: 0;
            padding: 0;
            list-style: none;
        }

        .result-card li {
            display: flex;
            gap: 12px;
            align-items: flex-start;
            color: var(--muted);
            line-height: 1.7;
        }

        .result-card.safe li {
            color: #c8d0e1;
        }

        .status-dot {
            width: 10px;
            height: 10px;
            flex: 0 0 10px;
            margin-top: 9px;
            background: var(--danger);
            border-radius: 50%;
            box-shadow: 0 0 0 5px rgba(217,75,98,.1);
        }

        .safe .status-dot {
            background: #44d2a8;
            box-shadow: 0 0 0 5px rgba(68,210,168,.11);
        }

        .result-summary {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 14px;
            margin-top: 22px;
        }

        .summary-chip {
            padding: 18px;
            background: var(--primary-soft);
            border: 1px solid rgba(53,89,232,.12);
            border-radius: 14px;
        }

        .summary-chip strong {
            display: block;
            color: var(--primary);
            font-size: 1.2rem;
            font-weight: 900;
        }

        .summary-chip span {
            color: var(--muted);
            font-size: .82rem;
        }

        .category-matrix {
            display: grid;
            grid-template-columns: 1.1fr .9fr .9fr;
            grid-template-rows: auto auto;
            gap: 18px;
        }

        .category-card {
            min-height: 205px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            padding: 28px;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
        }

        .category-card:first-child {
            grid-row: span 2;
            min-height: 428px;
            color: #fff;
            background:
                radial-gradient(circle at 80% 15%, rgba(255,255,255,.16), transparent 28%),
                linear-gradient(155deg, #3458df, #263eaa);
            border-color: transparent;
        }

        .category-card:hover {
            transform: translateY(-5px);
            border-color: rgba(53,89,232,.36);
            box-shadow: var(--shadow-md);
        }

        .category-tag {
            align-self: flex-start;
            padding: 5px 10px;
            color: var(--primary);
            background: var(--primary-soft);
            border-radius: 999px;
            font-size: .77rem;
            font-weight: 800;
        }

        .category-card:first-child .category-tag {
            color: #fff;
            background: rgba(255,255,255,.14);
            border: 1px solid rgba(255,255,255,.16);
        }

        .category-card h3 {
            margin: 18px 0 8px;
            font-size: 1.25rem;
            font-weight: 850;
        }

        .category-card:first-child h3 {
            font-size: clamp(1.7rem, 3vw, 2.35rem);
        }

        .category-card p {
            margin: 0;
            color: var(--muted);
            font-size: .92rem;
            line-height: 1.8;
        }

        .category-card:first-child p {
            color: #dce4ff;
        }

        .category-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            margin-top: 22px;
            padding-top: 17px;
            border-top: 1px solid var(--border);
            color: var(--muted);
            font-size: .84rem;
            font-weight: 700;
        }

        .category-card:first-child .category-meta {
            color: #fff;
            border-color: rgba(255,255,255,.18);
        }

        .timeline {
            position: relative;
            max-width: 980px;
            margin-inline: auto;
        }

        .timeline::before {
            content: "";
            position: absolute;
            top: 9px;
            bottom: 9px;
            left: 50%;
            width: 2px;
            transform: translateX(-50%);
            background: linear-gradient(var(--primary), var(--secondary));
        }

        .timeline-row {
            width: 50%;
            position: relative;
            padding: 0 56px 42px 0;
        }

        .timeline-row:nth-child(even) {
            margin-left: 50%;
            padding: 0 0 42px 56px;
        }

        .timeline-row::after {
            content: "";
            position: absolute;
            top: 7px;
            right: -8px;
            width: 16px;
            height: 16px;
            background: #fff;
            border: 4px solid var(--primary);
            border-radius: 50%;
            box-shadow: 0 0 0 6px rgba(53,89,232,.1);
        }

        .timeline-row:nth-child(even)::after {
            right: auto;
            left: -8px;
            border-color: var(--secondary);
            box-shadow: 0 0 0 6px rgba(24,166,126,.1);
        }

        .timeline-date {
            color: var(--primary);
            font-size: .82rem;
            font-weight: 850;
            letter-spacing: .05em;
        }

        .timeline-row h3 {
            margin: 7px 0 8px;
            font-size: 1.18rem;
            font-weight: 850;
        }

        .timeline-row p {
            color: var(--muted);
            font-size: .9rem;
            line-height: 1.75;
        }

        .news-feature {
            display: grid;
            grid-template-columns: 1.08fr .92fr;
            gap: 24px;
        }

        .feature-story {
            min-height: 480px;
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            padding: clamp(28px, 5vw, 48px);
            color: #fff;
            overflow: hidden;
            background:
                linear-gradient(0deg, rgba(9,16,39,.96), rgba(9,16,39,.12)),
                radial-gradient(circle at 70% 20%, #667fec, transparent 33%),
                linear-gradient(145deg, #263b93, #151d3a);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
        }

        .feature-story .badge {
            align-self: flex-start;
            margin-bottom: 17px;
            padding: 7px 11px;
            color: #fff;
            background: rgba(255,255,255,.14);
            border: 1px solid rgba(255,255,255,.16);
            border-radius: 999px;
        }

        .feature-story h3 {
            max-width: 640px;
            margin: 0 0 14px;
            font-size: clamp(1.55rem, 3.4vw, 2.6rem);
            line-height: 1.35;
            font-weight: 850;
        }

        .feature-story p {
            max-width: 650px;
            color: #d1d8e8;
            line-height: 1.85;
        }

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

        .news-item {
            display: grid;
            grid-template-columns: 74px 1fr;
            gap: 19px;
            align-items: center;
            padding: 19px;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 16px;
            transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
        }

        .news-item:hover {
            transform: translateY(-3px);
            border-color: rgba(53,89,232,.35);
            box-shadow: var(--shadow-sm);
        }

        .news-date {
            min-height: 68px;
            display: grid;
            place-items: center;
            padding: 8px;
            color: var(--primary);
            text-align: center;
            background: var(--primary-soft);
            border-radius: 13px;
            font-size: .8rem;
            font-weight: 850;
            line-height: 1.35;
        }

        .news-item h3 {
            margin: 0 0 5px;
            font-size: 1rem;
            line-height: 1.5;
            font-weight: 850;
        }

        .news-item p {
            margin: 0;
            color: var(--muted);
            font-size: .84rem;
            line-height: 1.65;
        }

        .insight-strip {
            display: grid;
            grid-template-columns: .85fr 1.15fr;
            gap: 50px;
            align-items: center;
        }

        .quote-card {
            position: relative;
            padding: 42px;
            color: #fff;
            background: linear-gradient(145deg, #18a67e, #10765c);
            border-radius: var(--radius-lg);
            box-shadow: 0 22px 50px rgba(24,166,126,.2);
        }

        .quote-symbol {
            height: 44px;
            color: rgba(255,255,255,.38);
            font-family: Georgia, serif;
            font-size: 5rem;
            line-height: 1;
        }

        .quote-card blockquote {
            margin: 10px 0 20px;
            font-size: clamp(1.25rem, 2.5vw, 1.75rem);
            line-height: 1.65;
            font-weight: 780;
        }

        .quote-card cite {
            color: #d7fff3;
            font-size: .9rem;
            font-style: normal;
        }

        .insight-points {
            display: grid;
            gap: 22px;
        }

        .insight-point {
            display: grid;
            grid-template-columns: 42px 1fr;
            gap: 16px;
        }

        .insight-number {
            width: 42px;
            height: 42px;
            display: grid;
            place-items: center;
            color: var(--primary);
            background: var(--primary-soft);
            border-radius: 12px;
            font-size: .85rem;
            font-weight: 900;
        }

        .insight-point h3 {
            margin: 0 0 5px;
            font-size: 1.05rem;
            font-weight: 850;
        }

        .insight-point p {
            margin: 0;
            color: var(--muted);
            font-size: .9rem;
            line-height: 1.75;
        }

        .audience-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 22px;
        }

        .audience-card {
            padding: 34px;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
        }

        .audience-card.caution {
            background: #fffaf7;
            border-color: #f1dbcf;
        }

        .audience-card h3 {
            display: flex;
            align-items: center;
            gap: 12px;
            margin: 0 0 19px;
            font-size: 1.3rem;
            font-weight: 850;
        }

        .audience-card h3 span {
            width: 35px;
            height: 35px;
            display: grid;
            place-items: center;
            color: var(--secondary);
            background: var(--secondary-soft);
            border-radius: 10px;
        }

        .audience-card.caution h3 span {
            color: #c36f32;
            background: #fff0e5;
        }

        .audience-card ul {
            display: grid;
            gap: 13px;
            margin: 0;
            padding: 0;
            list-style: none;
        }

        .audience-card li {
            color: var(--muted);
            padding-bottom: 13px;
            border-bottom: 1px dashed var(--border);
        }

        .audience-card li:last-child {
            padding-bottom: 0;
            border-bottom: 0;
        }

        .trust-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 18px;
        }

        .trust-card {
            min-height: 235px;
            padding: 27px;
            background: rgba(255,255,255,.06);
            border: 1px solid rgba(255,255,255,.11);
            border-radius: var(--radius-md);
            transition: transform var(--transition), background-color var(--transition), border-color var(--transition);
        }

        .trust-card:hover {
            transform: translateY(-5px);
            background: rgba(255,255,255,.09);
            border-color: rgba(158,175,255,.38);
        }

        .trust-icon {
            width: 50px;
            height: 50px;
            display: grid;
            place-items: center;
            margin-bottom: 22px;
            color: #b9c6ff;
            background: rgba(116,141,255,.13);
            border-radius: 14px;
        }

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

        .trust-card h3 {
            margin: 0 0 9px;
            color: #fff;
            font-size: 1.08rem;
            font-weight: 850;
        }

        .trust-card p {
            color: #b9c2d8;
            font-size: .88rem;
            line-height: 1.75;
        }

        .standard-band {
            padding: 36px 0;
            background: #fff;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .standard-inner {
            display: grid;
            grid-template-columns: auto 1fr;
            gap: 38px;
            align-items: center;
        }

        .standard-title {
            max-width: 250px;
            margin: 0;
            font-size: 1.12rem;
            line-height: 1.5;
            font-weight: 850;
        }

        .standard-list {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 12px;
        }

        .standard-item {
            padding: 14px 16px;
            color: #4f5c76;
            text-align: center;
            background: var(--surface-alt);
            border: 1px solid var(--border);
            border-radius: 12px;
            font-size: .88rem;
            font-weight: 750;
        }

        .faq-wrap {
            display: grid;
            grid-template-columns: .75fr 1.25fr;
            gap: 70px;
            align-items: start;
        }

        .faq-aside {
            position: sticky;
            top: 118px;
        }

        .accordion {
            --bs-accordion-border-color: var(--border);
            --bs-accordion-border-radius: var(--radius-md);
            --bs-accordion-inner-border-radius: var(--radius-md);
            --bs-accordion-btn-focus-box-shadow: 0 0 0 .25rem rgba(53,89,232,.12);
            display: grid;
            gap: 12px;
        }

        .accordion-item {
            overflow: hidden;
            background: #fff;
            border: 1px solid var(--border) !important;
            border-radius: 15px !important;
            box-shadow: 0 6px 20px rgba(27,40,77,.04);
        }

        .accordion-button {
            padding: 21px 23px;
            color: var(--ink);
            background: #fff;
            font-weight: 820;
            line-height: 1.5;
        }

        .accordion-button:not(.collapsed) {
            color: var(--primary-dark);
            background: var(--primary-soft);
            box-shadow: inset 0 -1px 0 rgba(53,89,232,.1);
        }

        .accordion-button::after {
            background-size: 1rem;
        }

        .accordion-body {
            padding: 20px 23px 23px;
            color: var(--muted);
            line-height: 1.9;
        }

        .cta-section {
            padding-top: 0;
        }

        .cta-shell {
            position: relative;
            display: grid;
            grid-template-columns: 1fr .9fr;
            gap: 55px;
            align-items: center;
            padding: clamp(34px, 6vw, 66px);
            overflow: hidden;
            color: #fff;
            background:
                radial-gradient(circle at 90% 0%, rgba(83,218,177,.25), transparent 28%),
                linear-gradient(135deg, #2e4ed0, #1e358f);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
        }

        .cta-shell::after {
            content: "";
            position: absolute;
            right: -70px;
            bottom: -120px;
            width: 300px;
            height: 300px;
            border: 45px solid rgba(255,255,255,.06);
            border-radius: 50%;
        }

        .cta-content, .subscribe-form {
            position: relative;
            z-index: 1;
        }

        .cta-content h2 {
            margin: 0 0 15px;
            font-size: clamp(1.9rem, 4vw, 3.1rem);
            line-height: 1.25;
            font-weight: 900;
            letter-spacing: -.04em;
        }

        .cta-content p {
            color: #dce4ff;
            line-height: 1.9;
        }

        .subscribe-form {
            padding: 25px;
            background: rgba(255,255,255,.1);
            border: 1px solid rgba(255,255,255,.17);
            border-radius: 18px;
            backdrop-filter: blur(8px);
        }

        .form-label {
            display: block;
            margin-bottom: 9px;
            color: #fff;
            font-weight: 800;
        }

        .form-row {
            display: flex;
            gap: 10px;
        }

        .form-control {
            min-height: 50px;
            padding: .75rem 1rem;
            color: var(--ink);
            background: #fff;
            border: 1px solid transparent;
            border-radius: 11px;
            box-shadow: none;
        }

        .form-control:focus {
            border-color: #b9c6ff;
            box-shadow: 0 0 0 .25rem rgba(255,255,255,.16);
        }

        .subscribe-form .btn {
            flex: 0 0 auto;
            color: var(--primary-dark);
            background: #fff;
            border-color: #fff;
            box-shadow: none;
        }

        .subscribe-form .btn:hover {
            color: var(--primary-dark);
            background: #edf2ff;
            border-color: #edf2ff;
        }

        .privacy-note {
            margin-top: 10px;
            color: #ced8ff;
            font-size: .78rem;
            line-height: 1.6;
        }

        .form-message {
            min-height: 24px;
            margin-top: 9px;
            color: #dffcf3;
            font-size: .84rem;
            font-weight: 700;
        }

        .site-footer {
            padding: 58px 0 25px;
            color: #aeb8cc;
            background: #0c1326;
        }

        .footer-main {
            display: grid;
            grid-template-columns: 1.2fr .8fr;
            gap: 70px;
            padding-bottom: 37px;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 11px;
            margin-bottom: 17px;
            color: #fff;
            font-size: 1.05rem;
            font-weight: 850;
        }

        .footer-copy {
            max-width: 650px;
            color: #929eb5;
            font-size: .9rem;
            line-height: 1.9;
        }

        .footer-links {
            display: flex;
            flex-wrap: wrap;
            justify-content: flex-end;
            align-content: flex-start;
            gap: 10px 22px;
        }

        .footer-links a {
            color: #b8c1d3;
            font-size: .9rem;
        }

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

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            gap: 25px;
            padding-top: 24px;
            border-top: 1px solid rgba(255,255,255,.09);
            color: #7f8aa1;
            font-size: .8rem;
        }

        .footer-domain {
            word-break: break-all;
        }

        @media (max-width: 1024px) {
            .container {
                width: min(100% - 36px, 940px);
            }

            .navbar-brand {
                max-width: 430px;
                font-size: .96rem;
            }

            .section-head.split,
            .service-layout,
            .faq-wrap {
                grid-template-columns: 1fr;
                gap: 35px;
            }

            .service-intro,
            .faq-aside {
                position: static;
            }

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

            .kpi-item:nth-child(2) {
                border-right: 0;
            }

            .kpi-item:nth-child(-n+2) {
                border-bottom: 1px solid var(--border);
            }

            .category-matrix {
                grid-template-columns: 1fr 1fr;
            }

            .category-card:first-child {
                grid-column: span 2;
                grid-row: auto;
                min-height: 300px;
            }

            .news-feature,
            .insight-strip {
                grid-template-columns: 1fr;
            }

            .feature-story {
                min-height: 400px;
            }

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

            .standard-inner {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .standard-title {
                max-width: none;
            }

            .cta-shell {
                grid-template-columns: 1fr;
                gap: 30px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-space: 4.5rem;
            }

            .container {
                width: min(100% - 28px, 700px);
            }

            .announcement-inner {
                min-height: 56px;
                flex-wrap: wrap;
                gap: 4px 12px;
                padding: 7px 0;
                text-align: center;
            }

            .navbar {
                min-height: 68px;
            }

            .navbar-brand {
                max-width: calc(100% - 66px);
                margin-right: 0;
                font-size: .85rem;
            }

            .brand-mark {
                width: 36px;
                height: 36px;
                flex-basis: 36px;
                border-radius: 11px;
            }

            .navbar-collapse {
                margin-top: 12px;
                padding: 12px;
                background: #fff;
                border: 1px solid var(--border);
                border-radius: 14px;
                box-shadow: var(--shadow-md);
            }

            .navbar-nav {
                gap: 4px;
            }

            .navbar .nav-link.active::after {
                display: none;
            }

            .hero {
                min-height: auto;
                padding: 4.5rem 0 6rem;
            }

            .hero h1 {
                letter-spacing: -.045em;
            }

            .comparison-stage {
                grid-template-columns: 1fr;
            }

            .comparison-arrow {
                transform: rotate(90deg);
                margin: -8px auto;
            }

            .comparison-panel {
                min-height: 0;
                padding: 25px;
            }

            .kpi-board {
                margin-top: -30px;
            }

            .result-grid,
            .audience-grid {
                grid-template-columns: 1fr;
            }

            .result-summary {
                grid-template-columns: 1fr;
            }

            .timeline::before {
                left: 8px;
            }

            .timeline-row,
            .timeline-row:nth-child(even) {
                width: 100%;
                margin-left: 0;
                padding: 0 0 36px 44px;
            }

            .timeline-row::after,
            .timeline-row:nth-child(even)::after {
                right: auto;
                left: 0;
            }

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

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

            .footer-links {
                justify-content: flex-start;
            }

            .footer-bottom {
                flex-direction: column;
                gap: 8px;
            }
        }

        @media (max-width: 520px) {
            .container {
                width: min(100% - 22px, 500px);
            }

            .announcement-label {
                width: 100%;
            }

            .hero {
                padding-top: 3.6rem;
            }

            .hero h1 {
                font-size: clamp(2.05rem, 11.5vw, 3.1rem);
                overflow-wrap: anywhere;
            }

            .hero-lead {
                font-size: .97rem;
                line-height: 1.86;
            }

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

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

            .comparison-panel {
                padding: 22px;
            }

            .kpi-shell {
                grid-template-columns: 1fr;
            }

            .kpi-item {
                min-height: auto;
                padding: 22px;
                border-right: 0;
                border-bottom: 1px solid var(--border);
            }

            .kpi-item:last-child {
                border-bottom: 0;
            }

            .service-item {
                grid-template-columns: 48px 1fr;
                padding: 20px;
            }

            .service-icon {
                width: 48px;
                height: 48px;
                border-radius: 13px;
            }

            .service-index {
                display: none;
            }

            .category-matrix {
                grid-template-columns: 1fr;
            }

            .category-card:first-child {
                grid-column: auto;
                min-height: 330px;
            }

            .feature-story {
                min-height: 430px;
                padding: 28px 23px;
            }

            .news-item {
                grid-template-columns: 60px 1fr;
                gap: 14px;
                padding: 15px;
            }

            .news-date {
                min-height: 60px;
            }

            .quote-card,
            .audience-card {
                padding: 27px 23px;
            }

            .trust-grid,
            .standard-list {
                grid-template-columns: 1fr;
            }

            .trust-card {
                min-height: 0;
            }

            .accordion-button,
            .accordion-body {
                padding-left: 18px;
                padding-right: 18px;
            }

            .cta-shell {
                padding: 31px 21px;
                border-radius: 22px;
            }

            .subscribe-form {
                padding: 18px;
            }

            .form-row {
                flex-direction: column;
            }

            .subscribe-form .btn {
                width: 100%;
            }
        }

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

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

/* roulang page: category1 */
:root {
      --primary: #3559e8;
      --primary-dark: #243fbd;
      --primary-soft: #eef2ff;
      --secondary: #18a67e;
      --secondary-soft: #e9faf4;
      --accent: #f0a525;
      --danger: #d94b62;
      --ink: #182035;
      --muted: #64708a;
      --surface: #ffffff;
      --surface-alt: #f5f7fc;
      --surface-deep: #11192d;
      --border: #dfe5f0;
      --border-strong: #cbd5e4;
      --radius-sm: 10px;
      --radius-md: 18px;
      --radius-lg: 28px;
      --shadow-sm: 0 8px 24px rgba(27,40,77,.07);
      --shadow-md: 0 18px 50px rgba(27,40,77,.12);
      --shadow-lg: 0 28px 80px rgba(20,31,68,.17);
      --section-space: clamp(4.5rem, 8vw, 7.5rem);
      --transition: 180ms ease;
    }

    *, *::before, *::after { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 100px; }
    body {
      margin: 0;
      color: var(--ink);
      background: var(--surface);
      font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
      font-size: 16px;
      line-height: 1.8;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    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(--primary); }
    button, input { font: inherit; }
    button, .btn, a { -webkit-tap-highlight-color: transparent; }
    button:focus-visible, input:focus-visible, a:focus-visible {
      outline: 3px solid rgba(53,89,232,.28);
      outline-offset: 3px;
    }
    img, svg { display: block; max-width: 100%; }
    .container {
      width: min(1180px, calc(100% - 40px));
      max-width: none;
      margin-inline: auto;
      padding-inline: 0;
    }
    main { display: block; }
    section { position: relative; padding: var(--section-space) 0; }
    .section-soft { background: var(--surface-alt); }
    .section-dark {
      color: #fff;
      background:
        radial-gradient(circle at 85% 15%, rgba(74,100,232,.25), transparent 32%),
        radial-gradient(circle at 10% 90%, rgba(24,166,126,.16), transparent 32%),
        var(--surface-deep);
    }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1030;
      background: rgba(255,255,255,.94);
      border-bottom: 1px solid rgba(223,229,240,.85);
      box-shadow: 0 5px 20px rgba(24,32,53,.04);
      backdrop-filter: blur(16px);
    }
    .navbar { min-height: 76px; padding: 10px 0; }
    .navbar-brand {
      display: inline-flex;
      align-items: center;
      gap: 11px;
      max-width: 510px;
      margin-right: 2rem;
      color: var(--ink);
      font-size: 1.04rem;
      font-weight: 800;
      line-height: 1.3;
      white-space: normal;
    }
    .navbar-brand:hover, .footer-brand:hover { color: var(--primary); }
    .brand-mark {
      width: 40px;
      height: 40px;
      flex: 0 0 40px;
      display: grid;
      place-items: center;
      color: #fff;
      background: linear-gradient(145deg, var(--primary), #7c5ce7);
      border-radius: 13px;
      box-shadow: 0 10px 22px rgba(53,89,232,.25);
    }
    .brand-mark svg { width: 21px; height: 21px; }
    .navbar-toggler {
      padding: .55rem .65rem;
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      box-shadow: none !important;
    }
    .navbar-toggler-icon { width: 1.25em; height: 1.25em; }
    .navbar-nav { gap: 8px; }
    .navbar .nav-link {
      position: relative;
      padding: .62rem 1rem !important;
      color: var(--muted);
      border-radius: 10px;
      font-weight: 700;
    }
    .navbar .nav-link:hover, .navbar .nav-link.active {
      color: var(--primary);
      background: var(--primary-soft);
    }
    .navbar .nav-link.active::after {
      content: "";
      position: absolute;
      left: 30%;
      right: 30%;
      bottom: 4px;
      height: 2px;
      background: var(--primary);
      border-radius: 2px;
    }

    .page-intro {
      padding: 32px 0 0;
      background: var(--surface);
    }
    .breadcrumb {
      display: flex;
      gap: 9px;
      margin: 0;
      color: var(--muted);
      font-size: .9rem;
    }
    .breadcrumb-item + .breadcrumb-item::before { color: #aab4c7; }
    .breadcrumb a:hover { color: var(--primary); }
    .hero {
      position: relative;
      overflow: hidden;
      padding: 58px 0 64px;
      color: #fff;
      background:
        radial-gradient(ellipse at 86% 15%, rgba(240,165,37,.18), transparent 30%),
        radial-gradient(ellipse at 15% 100%, rgba(24,166,126,.2), transparent 36%),
        #11192d;
    }
    .hero::after {
      content: "";
      position: absolute;
      inset: auto 0 0;
      height: 1px;
      background: linear-gradient(90deg, transparent, rgba(255,255,255,.3), transparent);
    }
    .hero-grid {
      display: grid;
      grid-template-columns: minmax(0, 1.15fr) minmax(290px, .85fr);
      align-items: center;
      gap: 64px;
    }
    .hero-kicker {
      display: inline-flex;
      align-items: center;
      gap: 9px;
      margin-bottom: 18px;
      color: #f6c86d;
      font-size: .86rem;
      font-weight: 800;
    }
    .hero-kicker::before {
      content: "";
      width: 24px;
      height: 2px;
      background: currentColor;
    }
    h1 {
      max-width: 760px;
      margin: 0;
      font-size: clamp(2.35rem, 5vw, 4.4rem);
      line-height: 1.16;
      font-weight: 850;
    }
    .hero-lead {
      max-width: 690px;
      margin: 22px 0 0;
      color: rgba(255,255,255,.76);
      font-size: 1.08rem;
      line-height: 1.95;
    }
    .hero-meta {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 26px;
    }
    .hero-tag {
      display: inline-flex;
      align-items: center;
      min-height: 34px;
      padding: 5px 12px;
      color: rgba(255,255,255,.88);
      background: rgba(255,255,255,.08);
      border: 1px solid rgba(255,255,255,.16);
      border-radius: 999px;
      font-size: .84rem;
      font-weight: 650;
    }
    .hero-panel {
      position: relative;
      padding: 27px;
      border: 1px solid rgba(255,255,255,.18);
      border-radius: var(--radius-md);
      background: rgba(255,255,255,.06);
      box-shadow: 0 20px 50px rgba(0,0,0,.18);
    }
    .panel-overline {
      margin-bottom: 12px;
      color: #f6c86d;
      font-size: .78rem;
      font-weight: 800;
      letter-spacing: .04em;
    }
    .panel-title {
      margin: 0 0 17px;
      color: #fff;
      font-size: 1.25rem;
      font-weight: 800;
    }
    .panel-list { display: grid; gap: 12px; margin: 0; padding: 0; list-style: none; }
    .panel-list li {
      display: flex;
      align-items: flex-start;
      gap: 11px;
      color: rgba(255,255,255,.78);
      font-size: .92rem;
      line-height: 1.6;
    }
    .check-mark {
      display: grid;
      width: 21px;
      height: 21px;
      flex: 0 0 21px;
      place-items: center;
      margin-top: 1px;
      color: #b5f0d8;
      border: 1px solid rgba(181,240,216,.38);
      border-radius: 50%;
      font-size: .72rem;
      font-weight: 900;
    }

    .content-section { padding: 74px 0; }
    .content-section.section-soft { background: var(--surface-alt); }
    .section-head {
      max-width: 780px;
      margin-bottom: 36px;
    }
    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      margin-bottom: 13px;
      color: var(--primary);
      font-size: .83rem;
      font-weight: 800;
    }
    .eyebrow::before {
      content: "";
      width: 24px;
      height: 3px;
      background: currentColor;
      border-radius: 3px;
    }
    .section-title {
      margin: 0;
      color: var(--ink);
      font-size: clamp(1.8rem, 3vw, 2.65rem);
      line-height: 1.3;
      font-weight: 850;
    }
    .section-desc {
      max-width: 740px;
      margin: 13px 0 0;
      color: var(--muted);
      font-size: 1rem;
      line-height: 1.9;
    }
    .topic-layout {
      display: grid;
      grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr);
      gap: 46px;
      align-items: start;
    }
    .topic-aside {
      position: sticky;
      top: 112px;
      padding: 26px;
      color: #fff;
      background: var(--surface-deep);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-md);
    }
    .topic-aside .eyebrow { color: #aabaff; }
    .topic-aside h2 { margin: 0; color: #fff; font-size: 1.55rem; line-height: 1.4; font-weight: 800; }
    .topic-aside p { margin: 13px 0 0; color: rgba(255,255,255,.7); }
    .aside-rule { height: 1px; margin: 22px 0; background: rgba(255,255,255,.15); }
    .aside-note { display: flex; gap: 12px; color: rgba(255,255,255,.82); font-size: .9rem; }
    .aside-note strong { display: block; color: #fff; font-size: .96rem; }
    .topic-list { display: grid; gap: 16px; }
    .topic-item {
      display: grid;
      grid-template-columns: 52px minmax(0, 1fr);
      gap: 17px;
      padding: 21px;
      background: #fff;
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
    }
    .topic-item:hover {
      transform: translateY(-3px);
      border-color: #c7d2ff;
      box-shadow: var(--shadow-sm);
    }
    .topic-number {
      display: grid;
      width: 48px;
      height: 48px;
      place-items: center;
      color: var(--primary);
      background: var(--primary-soft);
      border-radius: 14px;
      font-size: .95rem;
      font-weight: 850;
    }
    .topic-item h3 { margin: 0; color: var(--ink); font-size: 1.08rem; line-height: 1.5; font-weight: 800; }
    .topic-item p { margin: 7px 0 0; color: var(--muted); font-size: .94rem; line-height: 1.8; }

    .principles-grid {
      display: grid;
      grid-template-columns: repeat(4, minmax(0, 1fr));
      border-top: 1px solid var(--border);
      border-bottom: 1px solid var(--border);
    }
    .principle {
      padding: 25px 23px 27px 0;
    }
    .principle + .principle { padding-left: 23px; border-left: 1px solid var(--border); }
    .principle-index { color: var(--secondary); font-size: .8rem; font-weight: 850; letter-spacing: .06em; }
    .principle h3 { margin: 9px 0 8px; font-size: 1.08rem; font-weight: 800; }
    .principle p { margin: 0; color: var(--muted); font-size: .91rem; line-height: 1.8; }

    .risk-layout { display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr); gap: 54px; align-items: center; }
    .risk-lead h2 { margin: 0; color: var(--ink); font-size: clamp(1.8rem, 3vw, 2.5rem); line-height: 1.35; font-weight: 850; }
    .risk-lead p { margin: 15px 0 0; color: var(--muted); line-height: 1.9; }
    .risk-rows { border-top: 1px solid var(--border-strong); }
    .risk-row {
      display: grid;
      grid-template-columns: 150px minmax(0, 1fr);
      gap: 20px;
      padding: 17px 0;
      border-bottom: 1px solid var(--border);
    }
    .risk-row strong { color: var(--ink); font-size: .96rem; }
    .risk-row span { color: var(--muted); font-size: .93rem; }

    .standard-band {
      padding: 30px;
      color: #fff;
      background: var(--surface-deep);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-md);
    }
    .standard-band-inner { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 30px; }
    .standard-band h2 { margin: 0; color: #fff; font-size: 1.5rem; font-weight: 800; }
    .standard-band p { max-width: 740px; margin: 9px 0 0; color: rgba(255,255,255,.72); }
    .btn-primary-custom, .btn-outline-custom {
      display: inline-flex;
      justify-content: center;
      align-items: center;
      gap: 9px;
      min-height: 48px;
      padding: 11px 19px;
      border: 1px solid transparent;
      border-radius: var(--radius-sm);
      font-weight: 800;
      transition: transform var(--transition), box-shadow var(--transition), background-color var(--transition), border-color var(--transition);
    }
    .btn-primary-custom { color: #fff; background: var(--primary); box-shadow: 0 9px 20px rgba(53,89,232,.22); }
    .btn-primary-custom:hover { color: #fff; background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 12px 24px rgba(53,89,232,.28); }
    .btn-outline-custom { color: var(--ink); background: #fff; border-color: var(--border-strong); }
    .btn-outline-custom:hover { color: var(--primary); border-color: var(--primary); background: var(--primary-soft); }
    .standard-band .btn-outline-custom { color: #fff; background: transparent; border-color: rgba(255,255,255,.35); }
    .standard-band .btn-outline-custom:hover { color: #fff; border-color: #fff; background: rgba(255,255,255,.1); }

    .faq-list { border-top: 1px solid var(--border); }
    .faq-item { padding: 21px 0; border-bottom: 1px solid var(--border); }
    .faq-item h3 { margin: 0; color: var(--ink); font-size: 1.03rem; line-height: 1.55; font-weight: 800; }
    .faq-item p { max-width: 880px; margin: 9px 0 0; color: var(--muted); font-size: .95rem; line-height: 1.85; }

    .site-footer {
      padding: 46px 0 22px;
      color: rgba(255,255,255,.8);
      background: #11192d;
    }
    .footer-main {
      display: grid;
      grid-template-columns: minmax(0, 1.15fr) minmax(260px, .85fr);
      gap: 54px;
      padding-bottom: 34px;
    }
    .footer-brand {
      display: inline-flex;
      align-items: center;
      gap: 11px;
      color: #fff;
      font-size: 1.03rem;
      font-weight: 800;
    }
    .footer-copy { max-width: 620px; margin: 17px 0 0; color: rgba(255,255,255,.62); font-size: .92rem; line-height: 1.85; }
    .footer-links { display: flex; flex-wrap: wrap; align-content: start; justify-content: flex-end; gap: 10px 22px; padding-top: 10px; }
    .footer-links a { color: rgba(255,255,255,.7); font-size: .9rem; }
    .footer-links a:hover { color: #fff; }
    .footer-bottom {
      display: flex;
      justify-content: space-between;
      gap: 20px;
      padding-top: 18px;
      border-top: 1px solid rgba(255,255,255,.13);
      color: rgba(255,255,255,.48);
      font-size: .82rem;
    }
    .footer-domain { overflow-wrap: anywhere; text-align: right; }

    @media (max-width: 1024px) {
      .hero-grid { gap: 38px; }
      .topic-layout { gap: 30px; }
      .principles-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
      .principle:nth-child(3) { padding-left: 0; border-left: 0; border-top: 1px solid var(--border); }
      .principle:nth-child(4) { border-top: 1px solid var(--border); }
      .risk-layout { gap: 34px; }
    }
    @media (max-width: 767.98px) {
      .container { width: min(100% - 32px, 620px); }
      .navbar { min-height: 70px; }
      .navbar-brand { max-width: calc(100% - 68px); margin-right: 0; font-size: .94rem; }
      .navbar-collapse { padding: 10px 0 8px; }
      .navbar-nav { gap: 3px; }
      .navbar .nav-link { padding: .7rem .8rem !important; }
      .navbar .nav-link.active::after { left: 13px; right: auto; bottom: 5px; width: 22px; }
      .page-intro { padding-top: 22px; }
      .hero { padding: 43px 0 48px; }
      .hero-grid, .topic-layout, .risk-layout { grid-template-columns: 1fr; }
      .hero-grid { gap: 30px; }
      .hero-panel { max-width: 560px; }
      .content-section { padding: 58px 0; }
      .topic-aside { position: static; }
      .standard-band-inner { grid-template-columns: 1fr; }
      .standard-band-inner .btn-primary-custom { justify-self: start; }
      .footer-main { grid-template-columns: 1fr; gap: 27px; }
      .footer-links { justify-content: flex-start; }
    }
    @media (max-width: 520px) {
      body { font-size: 15px; }
      .container { width: calc(100% - 28px); }
      .brand-mark { width: 36px; height: 36px; flex-basis: 36px; border-radius: 11px; }
      h1 { font-size: 2.2rem; }
      .hero-lead { font-size: 1rem; }
      .hero-meta { gap: 7px; }
      .hero-tag { font-size: .78rem; }
      .topic-item { grid-template-columns: 42px minmax(0, 1fr); gap: 12px; padding: 16px; }
      .topic-number { width: 40px; height: 40px; }
      .principles-grid { grid-template-columns: 1fr; }
      .principle, .principle + .principle { padding: 20px 0; border-left: 0; }
      .principle + .principle { border-top: 1px solid var(--border); }
      .risk-row { grid-template-columns: 1fr; gap: 4px; }
      .standard-band { padding: 22px; }
      .standard-band .btn-primary-custom { width: 100%; }
      .footer-bottom { flex-direction: column; gap: 6px; }
      .footer-domain { text-align: left; }
    }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; }
    }