/* roulang page: index */
:root {
            --primary: #635bff;
            --primary-dark: #4b43dc;
            --primary-soft: #eeedff;
            --secondary: #16c7a0;
            --secondary-dark: #0e987b;
            --accent: #ffb648;
            --navy: #0b1736;
            --navy-light: #13244c;
            --text: #18223a;
            --muted: #66718a;
            --subtle: #8e98ae;
            --background: #f6f8fc;
            --surface: #ffffff;
            --surface-soft: #f0f3f9;
            --border: #e2e7f0;
            --border-strong: #d1d8e6;
            --success: #169b76;
            --warning: #c77a13;
            --danger: #d75564;
            --radius-sm: 10px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 34px;
            --shadow-sm: 0 8px 24px rgba(20, 35, 70, 0.07);
            --shadow-md: 0 18px 50px rgba(20, 35, 70, 0.11);
            --shadow-lg: 0 30px 80px rgba(7, 19, 49, 0.18);
            --container: 1180px;
            --transition: 180ms ease;
        }

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

        html {
            scroll-behavior: smooth;
            scroll-padding-top: 88px;
        }

        body {
            margin: 0;
            min-width: 320px;
            color: var(--text);
            background: var(--background);
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
            font-size: 16px;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            text-rendering: optimizeLegibility;
        }

        body.menu-open {
            overflow: hidden;
        }

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

        h1,
        h2,
        h3 {
            color: var(--navy);
            line-height: 1.22;
            letter-spacing: -0.025em;
        }

        h1 {
            margin-bottom: 24px;
            font-size: clamp(2.45rem, 5.8vw, 5rem);
            font-weight: 850;
        }

        h2 {
            margin-bottom: 18px;
            font-size: clamp(1.9rem, 3.4vw, 3rem);
            font-weight: 800;
        }

        h3 {
            margin-bottom: 12px;
            font-size: 1.22rem;
            font-weight: 750;
        }

        p {
            margin-bottom: 18px;
        }

        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);
        }

        button,
        input,
        select {
            font: inherit;
        }

        button {
            border: 0;
            cursor: pointer;
        }

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

        ul,
        ol {
            padding-left: 0;
        }

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

        :focus-visible {
            outline: 3px solid rgba(99, 91, 255, 0.35);
            outline-offset: 3px;
        }

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

        .section {
            position: relative;
            padding: 104px 0;
        }

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

        .section-dark {
            overflow: hidden;
            color: #d9e2f7;
            background: var(--navy);
        }

        .section-dark h2,
        .section-dark h3 {
            color: #fff;
        }

        .section-heading {
            max-width: 720px;
            margin-bottom: 48px;
        }

        .section-heading.center {
            margin-right: auto;
            margin-left: auto;
            text-align: center;
        }

        .section-heading p {
            margin-bottom: 0;
            color: var(--muted);
            font-size: 1.08rem;
        }

        .section-dark .section-heading p {
            color: #aebbd5;
        }

        .eyebrow,
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            width: fit-content;
            border-radius: 999px;
            font-weight: 700;
        }

        .eyebrow {
            margin-bottom: 18px;
            padding: 7px 12px;
            color: var(--primary-dark);
            background: var(--primary-soft);
            font-size: 0.82rem;
            letter-spacing: 0.03em;
        }

        .eyebrow::before {
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: var(--primary);
            content: "";
            box-shadow: 0 0 0 5px rgba(99, 91, 255, 0.11);
        }

        .badge {
            padding: 5px 10px;
            color: var(--secondary-dark);
            background: rgba(22, 199, 160, 0.11);
            font-size: 0.76rem;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            min-height: 50px;
            padding: 0 22px;
            border: 1px solid transparent;
            border-radius: 13px;
            font-weight: 750;
            line-height: 1;
            white-space: nowrap;
        }

        .btn svg {
            width: 18px;
            height: 18px;
            transition: transform var(--transition);
        }

        .btn:hover svg {
            transform: translateX(3px);
        }

        .btn-primary {
            color: #fff;
            background: var(--primary);
            box-shadow: 0 10px 26px rgba(99, 91, 255, 0.28);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            box-shadow: 0 15px 32px rgba(99, 91, 255, 0.35);
            transform: translateY(-2px);
        }

        .btn-primary:active {
            transform: translateY(0);
        }

        .btn-secondary {
            color: var(--navy);
            border-color: var(--border-strong);
            background: rgba(255, 255, 255, 0.82);
        }

        .btn-secondary:hover {
            border-color: var(--primary);
            background: #fff;
            box-shadow: var(--shadow-sm);
            transform: translateY(-2px);
        }

        .site-header {
            position: sticky;
            z-index: 1000;
            top: 0;
            border-bottom: 1px solid rgba(226, 231, 240, 0.85);
            background: rgba(255, 255, 255, 0.88);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
        }

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

        .logo {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            color: var(--navy);
            font-size: 1.05rem;
            font-weight: 850;
            letter-spacing: -0.02em;
        }

        .logo-mark {
            position: relative;
            display: grid;
            width: 40px;
            height: 40px;
            place-items: center;
            overflow: hidden;
            border-radius: 12px;
            color: #fff;
            background: var(--navy);
            box-shadow: 0 8px 20px rgba(11, 23, 54, 0.18);
        }

        .logo-mark::before,
        .logo-mark::after {
            position: absolute;
            border-radius: 4px;
            content: "";
            transform: rotate(-10deg);
        }

        .logo-mark::before {
            width: 17px;
            height: 24px;
            background: var(--primary);
        }

        .logo-mark::after {
            width: 8px;
            height: 16px;
            margin-left: 16px;
            background: var(--secondary);
        }

        .nav-panel {
            display: flex;
            align-items: center;
            gap: 34px;
        }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 6px;
            margin: 0;
            list-style: none;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            min-height: 42px;
            padding: 0 13px;
            border-radius: 10px;
            color: #536078;
            font-size: 0.94rem;
            font-weight: 650;
        }

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

        .nav-link:active {
            transform: scale(0.98);
        }

        .menu-toggle {
            display: none;
            width: 44px;
            height: 44px;
            padding: 10px;
            border-radius: 11px;
            color: var(--navy);
            background: var(--surface-soft);
        }

        .menu-toggle span {
            display: block;
            width: 100%;
            height: 2px;
            margin: 5px 0;
            border-radius: 999px;
            background: currentColor;
            transition: transform var(--transition), opacity var(--transition);
        }

        .menu-toggle[aria-expanded="true"] span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .menu-toggle[aria-expanded="true"] span:nth-child(2) {
            opacity: 0;
        }

        .menu-toggle[aria-expanded="true"] span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .hero {
            position: relative;
            overflow: hidden;
            padding: 84px 0 62px;
            background:
                radial-gradient(circle at 13% 4%, rgba(99, 91, 255, 0.15), transparent 29%),
                radial-gradient(circle at 88% 18%, rgba(22, 199, 160, 0.13), transparent 28%),
                linear-gradient(180deg, #ffffff 0%, #f6f8fc 100%);
        }

        .hero::before {
            position: absolute;
            inset: 0;
            opacity: 0.38;
            background-image:
                linear-gradient(rgba(99, 91, 255, 0.06) 1px, transparent 1px),
                linear-gradient(90deg, rgba(99, 91, 255, 0.06) 1px, transparent 1px);
            background-size: 46px 46px;
            content: "";
            mask-image: linear-gradient(to bottom, #000 0%, transparent 82%);
        }

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

        .hero-kicker {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 24px;
            padding: 8px 14px;
            border: 1px solid rgba(99, 91, 255, 0.16);
            border-radius: 999px;
            color: var(--primary-dark);
            background: rgba(255, 255, 255, 0.74);
            box-shadow: var(--shadow-sm);
            font-size: 0.88rem;
            font-weight: 720;
        }

        .hero-kicker span {
            display: inline-block;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--secondary);
            box-shadow: 0 0 0 5px rgba(22, 199, 160, 0.12);
        }

        .hero h1 {
            max-width: 1040px;
            margin-right: auto;
            margin-left: auto;
        }

        .hero h1 strong {
            color: var(--primary);
            font-weight: inherit;
        }

        .hero-lead {
            max-width: 780px;
            margin: 0 auto 30px;
            color: var(--muted);
            font-size: clamp(1.05rem, 2vw, 1.24rem);
            line-height: 1.85;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 13px;
            margin-bottom: 24px;
        }

        .hero-note {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 18px;
            margin: 0;
            color: var(--muted);
            font-size: 0.88rem;
            list-style: none;
        }

        .hero-note li {
            display: inline-flex;
            align-items: center;
            gap: 7px;
        }

        .hero-note li::before {
            width: 16px;
            height: 16px;
            border-radius: 50%;
            background:
                radial-gradient(circle at center, var(--secondary) 0 3px, transparent 4px),
                rgba(22, 199, 160, 0.13);
            content: "";
        }

        .product-window {
            position: relative;
            max-width: 1050px;
            margin: 64px auto 0;
            overflow: hidden;
            border: 1px solid rgba(255, 255, 255, 0.9);
            border-radius: 25px;
            background: #fff;
            box-shadow: var(--shadow-lg);
            text-align: left;
        }

        .window-bar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 56px;
            padding: 0 20px;
            border-bottom: 1px solid var(--border);
            background: #fafbfe;
        }

        .window-dots {
            display: flex;
            gap: 7px;
        }

        .window-dots i {
            display: block;
            width: 9px;
            height: 9px;
            border-radius: 50%;
            background: #d3d9e6;
        }

        .window-dots i:first-child {
            background: #ff7b86;
        }

        .window-dots i:nth-child(2) {
            background: var(--accent);
        }

        .window-dots i:nth-child(3) {
            background: var(--secondary);
        }

        .window-title {
            color: var(--muted);
            font-size: 0.82rem;
            font-weight: 650;
        }

        .dashboard {
            display: grid;
            grid-template-columns: 190px 1fr;
            min-height: 410px;
        }

        .dash-side {
            padding: 24px 16px;
            color: #b7c4dd;
            background: var(--navy);
        }

        .dash-brand {
            margin-bottom: 26px;
            color: #fff;
            font-size: 0.85rem;
            font-weight: 750;
        }

        .dash-nav-item {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 7px;
            padding: 10px 12px;
            border-radius: 9px;
            font-size: 0.78rem;
        }

        .dash-nav-item.active {
            color: #fff;
            background: rgba(99, 91, 255, 0.35);
        }

        .dash-nav-item i {
            width: 9px;
            height: 9px;
            border: 2px solid currentColor;
            border-radius: 3px;
        }

        .dash-main {
            padding: 28px;
            background: #f6f8fc;
        }

        .dash-head {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 20px;
        }

        .dash-head strong {
            color: var(--navy);
            font-size: 1rem;
        }

        .dash-status {
            padding: 5px 9px;
            border-radius: 999px;
            color: var(--success);
            background: rgba(22, 155, 118, 0.1);
            font-size: 0.7rem;
            font-weight: 700;
        }

        .metric-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 14px;
        }

        .metric {
            padding: 18px;
            border: 1px solid var(--border);
            border-radius: 13px;
            background: #fff;
        }

        .metric span {
            display: block;
            margin-bottom: 7px;
            color: var(--subtle);
            font-size: 0.72rem;
        }

        .metric strong {
            color: var(--navy);
            font-size: 1.35rem;
        }

        .metric em {
            display: block;
            margin-top: 4px;
            color: var(--success);
            font-size: 0.68rem;
            font-style: normal;
        }

        .chart-panel {
            display: grid;
            grid-template-columns: 1.5fr 0.8fr;
            gap: 14px;
            margin-top: 14px;
        }

        .chart-card,
        .check-card {
            min-height: 177px;
            padding: 18px;
            border: 1px solid var(--border);
            border-radius: 13px;
            background: #fff;
        }

        .chart-label {
            color: var(--navy);
            font-size: 0.78rem;
            font-weight: 700;
        }

        .bars {
            display: flex;
            align-items: end;
            height: 105px;
            gap: 9px;
            padding-top: 20px;
            border-bottom: 1px solid var(--border);
        }

        .bars i {
            flex: 1;
            min-width: 9px;
            border-radius: 4px 4px 0 0;
            background: var(--primary-soft);
        }

        .bars i:nth-child(1) { height: 38%; }
        .bars i:nth-child(2) { height: 57%; }
        .bars i:nth-child(3) { height: 44%; }
        .bars i:nth-child(4) { height: 78%; background: var(--primary); }
        .bars i:nth-child(5) { height: 63%; }
        .bars i:nth-child(6) { height: 88%; background: var(--secondary); }
        .bars i:nth-child(7) { height: 72%; }

        .check-line {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-top: 14px;
            color: var(--muted);
            font-size: 0.72rem;
        }

        .check-line b {
            width: 17px;
            height: 17px;
            border-radius: 50%;
            color: var(--success);
            background: rgba(22, 155, 118, 0.1);
            font-size: 0.65rem;
            line-height: 17px;
            text-align: center;
        }

        .trust-bar {
            padding: 28px 0;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
            background: #fff;
        }

        .trust-grid {
            display: grid;
            grid-template-columns: 1.2fr repeat(4, 1fr);
            align-items: center;
            gap: 16px;
        }

        .trust-intro {
            color: var(--muted);
            font-size: 0.9rem;
            font-weight: 650;
        }

        .trust-item {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 9px;
            min-height: 42px;
            color: #66718a;
            font-size: 0.88rem;
            font-weight: 700;
        }

        .trust-icon {
            display: grid;
            width: 30px;
            height: 30px;
            place-items: center;
            border-radius: 9px;
            color: var(--primary);
            background: var(--primary-soft);
        }

        .trust-icon svg {
            width: 16px;
            height: 16px;
        }

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

        .feature-card {
            position: relative;
            min-height: 270px;
            padding: 28px;
            overflow: hidden;
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            background: var(--surface);
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
        }

        .feature-card:hover {
            border-color: rgba(99, 91, 255, 0.35);
            box-shadow: var(--shadow-md);
            transform: translateY(-5px);
        }

        .feature-card.featured {
            color: #dfe7fa;
            border-color: transparent;
            background: var(--navy);
        }

        .feature-card.featured h3 {
            color: #fff;
        }

        .feature-card p {
            color: var(--muted);
            font-size: 0.94rem;
        }

        .feature-card.featured p {
            color: #b5c1d9;
        }

        .feature-icon {
            display: grid;
            width: 49px;
            height: 49px;
            margin-bottom: 38px;
            place-items: center;
            border-radius: 15px;
            color: var(--primary);
            background: var(--primary-soft);
        }

        .featured .feature-icon {
            color: #fff;
            background: rgba(99, 91, 255, 0.4);
        }

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

        .feature-number {
            position: absolute;
            top: 24px;
            right: 24px;
            color: #dce2ee;
            font-size: 1.55rem;
            font-weight: 850;
        }

        .featured .feature-number {
            color: rgba(255, 255, 255, 0.14);
        }

        .feature-card ul {
            display: grid;
            gap: 8px;
            margin: 18px 0 0;
            list-style: none;
        }

        .feature-card li {
            display: flex;
            gap: 8px;
            color: var(--muted);
            font-size: 0.85rem;
        }

        .feature-card li::before {
            color: var(--secondary);
            content: "✓";
            font-weight: 850;
        }

        .featured li {
            color: #c2cce0;
        }

        .workflow-wrap {
            display: grid;
            grid-template-columns: 0.8fr 1.2fr;
            align-items: start;
            gap: 72px;
        }

        .workflow-copy {
            position: sticky;
            top: 112px;
        }

        .workflow-copy p {
            color: var(--muted);
        }

        .mini-proof {
            display: flex;
            gap: 14px;
            margin-top: 30px;
            padding: 18px;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            background: #fff;
        }

        .mini-proof-icon {
            display: grid;
            flex: 0 0 42px;
            height: 42px;
            place-items: center;
            border-radius: 12px;
            color: var(--success);
            background: rgba(22, 155, 118, 0.1);
        }

        .mini-proof-icon svg {
            width: 21px;
            height: 21px;
        }

        .mini-proof strong {
            display: block;
            color: var(--navy);
            font-size: 0.93rem;
        }

        .mini-proof span {
            color: var(--muted);
            font-size: 0.82rem;
        }

        .steps {
            position: relative;
            display: grid;
            gap: 16px;
        }

        .steps::before {
            position: absolute;
            top: 35px;
            bottom: 35px;
            left: 30px;
            width: 2px;
            background: linear-gradient(var(--primary), var(--secondary));
            content: "";
        }

        .step {
            position: relative;
            display: grid;
            grid-template-columns: 62px 1fr;
            gap: 18px;
            padding: 24px;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            background: #fff;
            box-shadow: var(--shadow-sm);
        }

        .step-index {
            position: relative;
            z-index: 1;
            display: grid;
            width: 38px;
            height: 38px;
            place-items: center;
            border: 6px solid #fff;
            border-radius: 50%;
            color: #fff;
            background: var(--primary);
            box-sizing: content-box;
            font-size: 0.8rem;
            font-weight: 800;
        }

        .step:nth-child(4) .step-index {
            background: var(--secondary-dark);
        }

        .step p {
            margin: 0;
            color: var(--muted);
            font-size: 0.92rem;
        }

        .quality-grid {
            display: grid;
            grid-template-columns: 1.05fr 0.95fr;
            align-items: center;
            gap: 60px;
        }

        .quality-copy > p {
            color: #aebbd5;
        }

        .quality-list {
            display: grid;
            gap: 14px;
            margin: 30px 0 0;
            list-style: none;
        }

        .quality-list li {
            display: flex;
            align-items: flex-start;
            gap: 13px;
            padding: 17px;
            border: 1px solid rgba(255, 255, 255, 0.09);
            border-radius: 14px;
            background: rgba(255, 255, 255, 0.045);
        }

        .quality-list b {
            display: grid;
            flex: 0 0 25px;
            height: 25px;
            place-items: center;
            border-radius: 8px;
            color: var(--secondary);
            background: rgba(22, 199, 160, 0.12);
        }

        .quality-list strong {
            display: block;
            margin-bottom: 2px;
            color: #fff;
            font-size: 0.94rem;
        }

        .quality-list span {
            color: #aebbd5;
            font-size: 0.84rem;
        }

        .audit-board {
            position: relative;
            padding: 26px;
            border: 1px solid rgba(255, 255, 255, 0.11);
            border-radius: var(--radius-lg);
            background: rgba(255, 255, 255, 0.06);
            box-shadow: 0 30px 80px rgba(0, 0, 0, 0.18);
        }

        .audit-board::before {
            position: absolute;
            z-index: -1;
            width: 240px;
            height: 240px;
            right: -90px;
            bottom: -100px;
            border-radius: 50%;
            background: rgba(99, 91, 255, 0.3);
            filter: blur(20px);
            content: "";
        }

        .audit-head {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-bottom: 19px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.09);
        }

        .audit-head strong {
            color: #fff;
        }

        .audit-score {
            display: grid;
            width: 62px;
            height: 62px;
            place-items: center;
            border: 5px solid rgba(22, 199, 160, 0.25);
            border-top-color: var(--secondary);
            border-radius: 50%;
            color: #fff;
            font-size: 0.9rem;
            font-weight: 800;
        }

        .audit-row {
            display: grid;
            grid-template-columns: 1fr 100px 52px;
            align-items: center;
            gap: 12px;
            padding: 17px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.07);
            font-size: 0.82rem;
        }

        .audit-row:last-child {
            border-bottom: 0;
        }

        .audit-row span {
            color: #c5d0e5;
        }

        .progress {
            height: 7px;
            overflow: hidden;
            border-radius: 999px;
            background: rgba(255, 255, 255, 0.1);
        }

        .progress i {
            display: block;
            height: 100%;
            border-radius: inherit;
            background: var(--secondary);
        }

        .audit-row b {
            color: #fff;
            text-align: right;
        }

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

        .scenario-card {
            padding: 28px;
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            background: #fff;
            transition: transform var(--transition), box-shadow var(--transition);
        }

        .scenario-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }

        .scenario-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 34px;
        }

        .scenario-symbol {
            display: grid;
            width: 48px;
            height: 48px;
            place-items: center;
            border-radius: 15px;
            color: var(--primary);
            background: var(--primary-soft);
        }

        .scenario-symbol svg {
            width: 24px;
            height: 24px;
        }

        .scenario-card:nth-child(2) .scenario-symbol {
            color: var(--secondary-dark);
            background: rgba(22, 199, 160, 0.11);
        }

        .scenario-card:nth-child(3) .scenario-symbol {
            color: var(--warning);
            background: rgba(255, 182, 72, 0.15);
        }

        .scenario-card p {
            color: var(--muted);
            font-size: 0.93rem;
        }

        .scenario-card a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: 8px;
            color: var(--primary-dark);
            font-size: 0.88rem;
            font-weight: 750;
        }

        .scenario-card a:hover {
            gap: 10px;
        }

        .selector-box {
            display: grid;
            grid-template-columns: 1fr auto;
            align-items: end;
            gap: 18px;
            margin-top: 48px;
            padding: 28px;
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            background: var(--surface-soft);
        }

        .selector-fields {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 14px;
        }

        .field label {
            display: block;
            margin-bottom: 7px;
            color: var(--navy);
            font-size: 0.82rem;
            font-weight: 700;
        }

        .field select {
            width: 100%;
            height: 48px;
            padding: 0 40px 0 14px;
            border: 1px solid var(--border-strong);
            border-radius: 11px;
            color: var(--text);
            background: #fff;
            outline: none;
            transition: border-color var(--transition), box-shadow var(--transition);
        }

        .field select:hover {
            border-color: #b8c1d4;
        }

        .field select:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 4px rgba(99, 91, 255, 0.1);
        }

        .selector-result {
            grid-column: 1 / -1;
            display: none;
            margin: 0;
            padding: 14px 16px;
            border-left: 4px solid var(--secondary);
            border-radius: 8px;
            color: #3d4961;
            background: #fff;
            font-size: 0.9rem;
        }

        .selector-result.show {
            display: block;
        }

        .insight-grid {
            display: grid;
            grid-template-columns: 1.15fr 0.85fr;
            gap: 22px;
        }

        .article-feature {
            position: relative;
            min-height: 420px;
            overflow: hidden;
            border-radius: var(--radius-lg);
            color: #fff;
            background:
                radial-gradient(circle at 78% 20%, rgba(22, 199, 160, 0.35), transparent 26%),
                radial-gradient(circle at 15% 85%, rgba(99, 91, 255, 0.55), transparent 34%),
                var(--navy);
            box-shadow: var(--shadow-md);
        }

        .article-visual {
            position: absolute;
            top: 44px;
            right: 44px;
            width: 180px;
            height: 180px;
        }

        .orbit {
            position: absolute;
            inset: 0;
            border: 1px solid rgba(255, 255, 255, 0.14);
            border-radius: 50%;
        }

        .orbit:nth-child(2) {
            inset: 28px;
        }

        .orbit:nth-child(3) {
            inset: 58px;
            background: rgba(99, 91, 255, 0.5);
        }

        .orbit::before {
            position: absolute;
            top: 20%;
            left: -5px;
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--secondary);
            content: "";
        }

        .article-feature-content {
            position: absolute;
            right: 0;
            bottom: 0;
            left: 0;
            z-index: 2;
            padding: 34px;
            background: linear-gradient(transparent, rgba(6, 15, 37, 0.95) 35%);
        }

        .article-feature h3 {
            max-width: 520px;
            margin-top: 14px;
            color: #fff;
            font-size: clamp(1.45rem, 3vw, 2.05rem);
        }

        .article-feature p {
            max-width: 580px;
            margin-bottom: 0;
            color: #c0cce2;
            font-size: 0.92rem;
        }

        .article-list {
            display: grid;
            gap: 14px;
        }

        .article-item {
            display: block;
            padding: 22px;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            background: #fff;
            transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
        }

        .article-item:hover {
            border-color: rgba(99, 91, 255, 0.35);
            box-shadow: var(--shadow-sm);
            transform: translateX(4px);
        }

        .article-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 9px;
            color: var(--subtle);
            font-size: 0.75rem;
        }

        .article-item h3 {
            margin-bottom: 7px;
            font-size: 1rem;
        }

        .article-item p {
            margin: 0;
            color: var(--muted);
            font-size: 0.84rem;
            line-height: 1.65;
        }

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

        .principle-card {
            padding: 32px;
            border-radius: var(--radius-lg);
        }

        .principle-card.good {
            border: 1px solid rgba(22, 155, 118, 0.2);
            background: rgba(22, 199, 160, 0.07);
        }

        .principle-card.avoid {
            border: 1px solid rgba(215, 85, 100, 0.16);
            background: rgba(215, 85, 100, 0.05);
        }

        .principle-title {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 20px;
        }

        .principle-title i {
            display: grid;
            width: 36px;
            height: 36px;
            place-items: center;
            border-radius: 11px;
            font-style: normal;
            font-weight: 850;
        }

        .good .principle-title i {
            color: var(--success);
            background: rgba(22, 155, 118, 0.12);
        }

        .avoid .principle-title i {
            color: var(--danger);
            background: rgba(215, 85, 100, 0.11);
        }

        .principle-title h3 {
            margin: 0;
        }

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

        .principle-card li {
            position: relative;
            padding-left: 20px;
            color: var(--muted);
            font-size: 0.92rem;
        }

        .principle-card li::before {
            position: absolute;
            top: 0.62em;
            left: 0;
            width: 7px;
            height: 7px;
            border-radius: 50%;
            content: "";
        }

        .good li::before {
            background: var(--success);
        }

        .avoid li::before {
            background: var(--danger);
        }

        .faq-wrap {
            display: grid;
            grid-template-columns: 0.72fr 1.28fr;
            align-items: start;
            gap: 64px;
        }

        .faq-intro {
            position: sticky;
            top: 112px;
        }

        .faq-intro p {
            color: var(--muted);
        }

        .faq-note {
            margin-top: 24px;
            padding: 18px;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            background: var(--surface-soft);
            color: var(--muted);
            font-size: 0.88rem;
        }

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

        .faq-item {
            overflow: hidden;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            background: #fff;
            transition: border-color var(--transition), box-shadow var(--transition);
        }

        .faq-item:hover,
        .faq-item.open {
            border-color: rgba(99, 91, 255, 0.35);
            box-shadow: var(--shadow-sm);
        }

        .faq-question {
            display: flex;
            width: 100%;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            padding: 20px 22px;
            color: var(--navy);
            background: transparent;
            text-align: left;
            font-weight: 750;
        }

        .faq-toggle {
            position: relative;
            flex: 0 0 30px;
            height: 30px;
            border-radius: 9px;
            background: var(--surface-soft);
        }

        .faq-toggle::before,
        .faq-toggle::after {
            position: absolute;
            top: 14px;
            left: 9px;
            width: 12px;
            height: 2px;
            border-radius: 999px;
            background: var(--primary);
            content: "";
            transition: transform var(--transition);
        }

        .faq-toggle::after {
            transform: rotate(90deg);
        }

        .faq-item.open .faq-toggle::after {
            transform: rotate(0);
        }

        .faq-answer {
            display: grid;
            grid-template-rows: 0fr;
            transition: grid-template-rows 260ms ease;
        }

        .faq-answer > div {
            overflow: hidden;
        }

        .faq-answer p {
            margin: 0;
            padding: 0 22px 22px;
            color: var(--muted);
            font-size: 0.94rem;
        }

        .faq-item.open .faq-answer {
            grid-template-rows: 1fr;
        }

        .cta-section {
            padding: 30px 0 94px;
            background: #fff;
        }

        .cta-box {
            position: relative;
            display: grid;
            grid-template-columns: 1fr auto;
            align-items: center;
            gap: 40px;
            overflow: hidden;
            padding: 54px;
            border-radius: var(--radius-xl);
            color: #dbe5f8;
            background: var(--navy);
            box-shadow: var(--shadow-lg);
        }

        .cta-box::before,
        .cta-box::after {
            position: absolute;
            border-radius: 50%;
            content: "";
        }

        .cta-box::before {
            width: 300px;
            height: 300px;
            top: -210px;
            right: 8%;
            background: rgba(99, 91, 255, 0.7);
            filter: blur(8px);
        }

        .cta-box::after {
            width: 170px;
            height: 170px;
            right: -80px;
            bottom: -110px;
            background: rgba(22, 199, 160, 0.55);
            filter: blur(8px);
        }

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

        .cta-copy h2 {
            max-width: 720px;
            margin-bottom: 12px;
            color: #fff;
        }

        .cta-copy p {
            max-width: 700px;
            margin: 0;
            color: #b8c5dc;
        }

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

        .cta-box .btn-primary {
            color: var(--navy);
            background: #fff;
            box-shadow: none;
        }

        .cta-box .btn-primary:hover {
            background: #f0f2ff;
        }

        .cta-box .btn-secondary {
            color: #fff;
            border-color: rgba(255, 255, 255, 0.2);
            background: rgba(255, 255, 255, 0.08);
        }

        .cta-box .btn-secondary:hover {
            border-color: rgba(255, 255, 255, 0.4);
            background: rgba(255, 255, 255, 0.13);
        }

        .site-footer {
            color: #9facc5;
            background: #071127;
        }

        .footer-main {
            display: grid;
            grid-template-columns: 1.4fr repeat(2, 0.65fr);
            gap: 70px;
            padding: 68px 0 44px;
        }

        .footer-brand .logo {
            margin-bottom: 18px;
            color: #fff;
        }

        .footer-brand p {
            max-width: 470px;
            margin-bottom: 0;
            font-size: 0.9rem;
        }

        .footer-column h3 {
            margin-bottom: 17px;
            color: #fff;
            font-size: 0.92rem;
        }

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

        .footer-links a {
            color: #9facc5;
            font-size: 0.88rem;
        }

        .footer-links a:hover {
            color: #fff;
            transform: translateX(3px);
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            padding: 22px 0 28px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 0.79rem;
        }

        .footer-bottom p {
            margin: 0;
        }

        .footer-status {
            display: inline-flex;
            align-items: center;
            gap: 7px;
        }

        .footer-status::before {
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: var(--secondary);
            content: "";
        }

        .back-top {
            position: fixed;
            z-index: 900;
            right: 22px;
            bottom: 22px;
            display: grid;
            width: 44px;
            height: 44px;
            place-items: center;
            border: 1px solid var(--border);
            border-radius: 13px;
            color: var(--navy);
            background: rgba(255, 255, 255, 0.92);
            box-shadow: var(--shadow-sm);
            opacity: 0;
            pointer-events: none;
            transform: translateY(12px);
            transition: opacity var(--transition), transform var(--transition), background var(--transition);
        }

        .back-top.show {
            opacity: 1;
            pointer-events: auto;
            transform: translateY(0);
        }

        .back-top:hover {
            color: #fff;
            border-color: var(--primary);
            background: var(--primary);
        }

        .back-top svg {
            width: 18px;
            height: 18px;
        }

        @media (max-width: 1024px) {
            .section {
                padding: 84px 0;
            }

            .nav-panel {
                gap: 18px;
            }

            .nav-list {
                gap: 0;
            }

            .nav-link {
                padding: 0 9px;
                font-size: 0.88rem;
            }

            .dashboard {
                grid-template-columns: 160px 1fr;
            }

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

            .feature-card:last-child,
            .scenario-card:last-child {
                grid-column: 1 / -1;
            }

            .workflow-wrap,
            .quality-grid {
                gap: 42px;
            }

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

            .article-feature {
                min-height: 380px;
            }

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

            .footer-main {
                grid-template-columns: 1.3fr 0.7fr 0.7fr;
                gap: 36px;
            }

            .cta-box {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 768px) {
            .container {
                width: min(calc(100% - 30px), var(--container));
            }

            .section {
                padding: 70px 0;
            }

            .section-heading {
                margin-bottom: 34px;
            }

            .menu-toggle {
                display: block;
            }

            .nav-panel {
                position: fixed;
                top: 76px;
                right: 0;
                left: 0;
                display: block;
                max-height: 0;
                overflow: hidden;
                border-bottom: 1px solid var(--border);
                background: rgba(255, 255, 255, 0.98);
                opacity: 0;
                transition: max-height 280ms ease, opacity var(--transition);
            }

            .nav-panel.open {
                max-height: 480px;
                opacity: 1;
                box-shadow: var(--shadow-md);
            }

            .nav-list {
                display: grid;
                width: min(calc(100% - 30px), var(--container));
                margin: 14px auto;
            }

            .nav-link {
                width: 100%;
                min-height: 48px;
                padding: 0 14px;
            }

            .nav-panel > .btn {
                display: flex;
                width: calc(100% - 30px);
                margin: 0 auto 18px;
            }

            .hero {
                padding-top: 62px;
            }

            .hero h1 {
                font-size: clamp(2.25rem, 10vw, 4rem);
            }

            .product-window {
                margin-top: 44px;
            }

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

            .dash-side {
                display: none;
            }

            .metric-grid {
                grid-template-columns: repeat(3, minmax(0, 1fr));
            }

            .chart-panel {
                grid-template-columns: 1fr;
            }

            .check-card {
                display: none;
            }

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

            .trust-intro {
                grid-column: 1 / -1;
                text-align: center;
            }

            .workflow-wrap,
            .quality-grid,
            .faq-wrap {
                grid-template-columns: 1fr;
            }

            .workflow-copy,
            .faq-intro {
                position: static;
            }

            .selector-box {
                grid-template-columns: 1fr;
            }

            .selector-fields {
                grid-template-columns: 1fr 1fr;
            }

            .selector-box .btn {
                width: 100%;
            }

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

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

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

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

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

            .cta-box {
                padding: 40px 30px;
            }
        }

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

            .container {
                width: min(calc(100% - 24px), var(--container));
            }

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

            .nav-panel {
                top: 68px;
            }

            .logo {
                gap: 9px;
                font-size: 0.93rem;
            }

            .logo-mark {
                width: 36px;
                height: 36px;
                border-radius: 10px;
            }

            .hero {
                padding: 46px 0 42px;
            }

            .hero-kicker {
                font-size: 0.78rem;
            }

            .hero h1 {
                font-size: 2.25rem;
            }

            .hero-actions {
                display: grid;
            }

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

            .hero-note {
                display: grid;
                justify-content: start;
                width: fit-content;
                margin-inline: auto;
                gap: 9px;
                text-align: left;
            }

            .product-window {
                border-radius: 17px;
            }

            .window-title {
                display: none;
            }

            .dash-main {
                padding: 16px;
            }

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

            .metric {
                display: flex;
                align-items: center;
                justify-content: space-between;
                padding: 14px;
            }

            .metric span,
            .metric em {
                margin: 0;
            }

            .metric em {
                display: none;
            }

            .chart-card {
                min-height: 150px;
            }

            .trust-grid {
                grid-template-columns: 1fr 1fr;
                gap: 8px;
            }

            .trust-item {
                justify-content: flex-start;
                font-size: 0.78rem;
            }

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

            .feature-card:last-child,
            .scenario-card:last-child {
                grid-column: auto;
            }

            .feature-card,
            .scenario-card {
                padding: 24px;
            }

            .steps::before {
                left: 23px;
            }

            .step {
                grid-template-columns: 48px 1fr;
                gap: 11px;
                padding: 18px;
            }

            .step-index {
                width: 34px;
                height: 34px;
            }

            .audit-board {
                padding: 20px;
            }

            .audit-row {
                grid-template-columns: 1fr 70px 38px;
                gap: 8px;
            }

            .selector-fields {
                grid-template-columns: 1fr;
            }

            .article-feature {
                min-height: 430px;
            }

            .article-visual {
                top: 32px;
                right: 24px;
                width: 150px;
                height: 150px;
            }

            .article-feature-content {
                padding: 26px;
            }

            .principle-card {
                padding: 25px;
            }

            .faq-question {
                padding: 18px;
            }

            .faq-answer p {
                padding: 0 18px 18px;
            }

            .cta-box {
                padding: 34px 22px;
                border-radius: 24px;
            }

            .cta-actions {
                display: grid;
                width: 100%;
            }

            .footer-main {
                grid-template-columns: 1fr;
                gap: 32px;
                padding-top: 52px;
            }

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

            .back-top {
                right: 14px;
                bottom: 14px;
            }
        }

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

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