/* roulang page: index */
:root {
            --ink: #101416;
            --ink-soft: #40494d;
            --muted: #6e787d;
            --paper: #f5f4ef;
            --surface: #ffffff;
            --surface-soft: #ecebe5;
            --line: rgba(16, 20, 22, .12);
            --line-strong: rgba(16, 20, 22, .22);
            --lime: #c8f35b;
            --lime-deep: #9dc92f;
            --orange: #ff7657;
            --blue: #73a8ff;
            --dark: #111719;
            --radius-sm: 12px;
            --radius-md: 20px;
            --radius-lg: 30px;
            --radius-xl: 42px;
            --shadow-sm: 0 12px 30px rgba(16, 20, 22, .07);
            --shadow-md: 0 22px 55px rgba(16, 20, 22, .11);
            --shadow-dark: 0 24px 70px rgba(0, 0, 0, .23);
            --transition: 220ms cubic-bezier(.2, .8, .2, 1);
        }

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

        html {
            scroll-behavior: smooth;
            scroll-padding-top: 145px;
        }

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

        body::selection {
            color: var(--ink);
            background: var(--lime);
        }

        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, textarea {
            font: inherit;
        }

        button {
            border: 0;
        }

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

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

        h1, h2, h3, h4 {
            letter-spacing: -.035em;
            font-weight: 800;
        }

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

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

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

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

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

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

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

        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 9px;
            margin-bottom: 18px;
            color: var(--ink-soft);
            font-size: .78rem;
            font-weight: 800;
            letter-spacing: .13em;
            text-transform: uppercase;
        }

        .eyebrow::before {
            width: 26px;
            height: 2px;
            content: "";
            background: var(--orange);
        }

        .section-dark .eyebrow {
            color: rgba(255,255,255,.66);
        }

        .section-title {
            max-width: 760px;
            margin-bottom: 20px;
            font-size: clamp(2.05rem, 4.4vw, 4.2rem);
            line-height: 1.05;
        }

        .section-lead {
            max-width: 760px;
            margin-bottom: 44px;
            color: var(--muted);
            font-size: 1.06rem;
        }

        .section-dark .section-lead {
            color: rgba(255,255,255,.65);
        }

        .badge-soft {
            display: inline-flex;
            align-items: center;
            padding: 7px 12px;
            color: var(--ink);
            background: var(--lime);
            border-radius: 999px;
            font-size: .75rem;
            font-weight: 800;
            letter-spacing: .04em;
        }

        .btn-c7 {
            display: inline-flex;
            min-height: 48px;
            align-items: center;
            justify-content: center;
            gap: 9px;
            padding: 11px 20px;
            color: #fff;
            background: var(--ink);
            border: 1px solid var(--ink);
            border-radius: 999px;
            font-weight: 750;
            box-shadow: none;
        }

        .btn-c7:hover {
            color: var(--ink);
            background: var(--lime);
            border-color: var(--lime);
            transform: translateY(-2px);
            box-shadow: var(--shadow-sm);
        }

        .btn-c7:active {
            transform: translateY(0);
        }

        .btn-c7:focus-visible,
        .channel-link:focus-visible,
        .brand-logo:focus-visible,
        .search-field:focus-visible,
        .form-control:focus,
        .form-select:focus,
        .accordion-button:focus {
            outline: 3px solid rgba(115, 168, 255, .42);
            outline-offset: 3px;
            box-shadow: none;
        }

        .site-header {
            position: sticky;
            z-index: 1030;
            top: 0;
            background: rgba(245, 244, 239, .92);
            border-bottom: 1px solid var(--line);
            backdrop-filter: blur(18px);
        }

        .brand-row {
            min-height: 86px;
            display: flex;
            align-items: center;
        }

        .brand-layout {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 30px;
        }

        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            flex: 0 0 auto;
        }

        .logo-mark {
            position: relative;
            display: grid;
            width: 48px;
            height: 48px;
            place-items: center;
            color: var(--lime);
            background: var(--ink);
            border-radius: 15px;
            font-size: 1.15rem;
            font-weight: 900;
            letter-spacing: -.06em;
            box-shadow: 7px 7px 0 var(--lime);
        }

        .logo-text {
            line-height: 1.15;
        }

        .logo-title {
            display: block;
            font-size: 1.05rem;
            font-weight: 900;
            letter-spacing: -.04em;
        }

        .logo-subtitle {
            display: block;
            margin-top: 5px;
            color: var(--muted);
            font-size: .68rem;
            font-weight: 700;
            letter-spacing: .12em;
        }

        .site-search {
            display: flex;
            width: min(440px, 46vw);
            align-items: center;
            padding: 5px;
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: 999px;
            box-shadow: 0 8px 24px rgba(16,20,22,.04);
        }

        .search-field {
            width: 100%;
            min-width: 0;
            padding: 9px 14px;
            color: var(--ink);
            background: transparent;
            border: 0;
            outline: 0;
        }

        .search-field::placeholder {
            color: #91999c;
        }

        .search-button {
            flex: 0 0 auto;
            padding: 9px 16px;
            color: var(--ink);
            background: var(--lime);
            border-radius: 999px;
            font-size: .86rem;
            font-weight: 800;
            transition: transform var(--transition), background var(--transition);
        }

        .search-button:hover {
            background: #d6ff70;
            transform: scale(1.03);
        }

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

        .channel-nav {
            min-height: 52px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
        }

        .channel-list {
            display: flex;
            align-items: center;
            gap: 8px;
            margin: 0;
            padding: 0;
            list-style: none;
        }

        .channel-link {
            position: relative;
            display: inline-flex;
            min-height: 38px;
            align-items: center;
            padding: 7px 16px;
            color: var(--ink-soft);
            border-radius: 999px;
            font-size: .93rem;
            font-weight: 750;
        }

        .channel-link:hover,
        .channel-link.active {
            color: var(--ink);
            background: var(--surface);
            box-shadow: inset 0 0 0 1px var(--line);
        }

        .channel-link.active::after {
            position: absolute;
            right: 13px;
            bottom: 4px;
            left: 13px;
            height: 2px;
            content: "";
            background: var(--orange);
            border-radius: 2px;
        }

        .channel-note {
            color: var(--muted);
            font-size: .78rem;
            font-weight: 700;
        }

        .navbar-toggler {
            display: none;
            width: 44px;
            height: 44px;
            padding: 0;
            background: var(--ink);
            border: 0;
            border-radius: 13px;
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 4px rgba(115,168,255,.3);
        }

        .toggle-lines,
        .toggle-lines::before,
        .toggle-lines::after {
            display: block;
            width: 19px;
            height: 2px;
            margin: auto;
            content: "";
            background: #fff;
            border-radius: 2px;
        }

        .toggle-lines {
            position: relative;
        }

        .toggle-lines::before {
            position: absolute;
            top: -6px;
        }

        .toggle-lines::after {
            position: absolute;
            top: 6px;
        }

        .hero {
            padding: 76px 0 104px;
            overflow: hidden;
        }

        .hero::before {
            position: absolute;
            top: 35px;
            right: -90px;
            width: 360px;
            height: 360px;
            content: "";
            background: var(--lime);
            border-radius: 50%;
            opacity: .25;
            filter: blur(4px);
        }

        .hero-stack {
            position: relative;
            min-height: 620px;
        }

        .hero-main-card {
            position: relative;
            z-index: 3;
            width: 76%;
            min-height: 540px;
            padding: clamp(36px, 6vw, 76px);
            color: #fff;
            background: var(--dark);
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-dark);
            overflow: hidden;
        }

        .hero-main-card::after {
            position: absolute;
            right: -80px;
            bottom: -120px;
            width: 360px;
            height: 360px;
            content: "";
            border: 72px solid rgba(200,243,91,.13);
            border-radius: 50%;
        }

        .hero-kicker {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 34px;
            color: var(--lime);
            font-size: .78rem;
            font-weight: 850;
            letter-spacing: .12em;
        }

        .hero-kicker::before {
            width: 9px;
            height: 9px;
            content: "";
            background: var(--lime);
            border-radius: 50%;
            box-shadow: 0 0 0 7px rgba(200,243,91,.12);
        }

        .hero h1 {
            position: relative;
            z-index: 1;
            max-width: 780px;
            margin-bottom: 26px;
            font-size: clamp(2.75rem, 6.3vw, 6.6rem);
            line-height: .98;
        }

        .hero-copy {
            position: relative;
            z-index: 1;
            max-width: 720px;
            margin-bottom: 42px;
            color: rgba(255,255,255,.71);
            font-size: 1.06rem;
        }

        .hero-points {
            position: relative;
            z-index: 1;
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        .hero-point {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 11px 15px;
            color: rgba(255,255,255,.84);
            background: rgba(255,255,255,.07);
            border: 1px solid rgba(255,255,255,.11);
            border-radius: 999px;
            font-size: .86rem;
            font-weight: 700;
        }

        .hero-point span {
            color: var(--lime);
            font-weight: 900;
        }

        .hero-side-card {
            position: absolute;
            z-index: 4;
            width: 300px;
            padding: 25px;
            border-radius: 27px;
            box-shadow: var(--shadow-md);
            transition: transform var(--transition);
        }

        .hero-side-card:hover {
            transform: translateY(-8px) rotate(0);
        }

        .hero-side-one {
            top: 64px;
            right: 0;
            color: var(--ink);
            background: var(--lime);
            transform: rotate(2.5deg);
        }

        .hero-side-two {
            right: 54px;
            bottom: 0;
            color: #fff;
            background: var(--orange);
            transform: rotate(-3deg);
        }

        .side-label {
            display: block;
            margin-bottom: 26px;
            font-size: .72rem;
            font-weight: 850;
            letter-spacing: .12em;
            opacity: .68;
        }

        .side-number {
            display: block;
            margin-bottom: 13px;
            font-size: 3.3rem;
            font-weight: 900;
            letter-spacing: -.08em;
            line-height: .9;
        }

        .side-title {
            margin-bottom: 10px;
            font-size: 1.2rem;
        }

        .side-copy {
            font-size: .88rem;
            line-height: 1.65;
            opacity: .78;
        }

        .capability-layout {
            display: grid;
            grid-template-columns: .82fr 1.18fr;
            gap: 74px;
            align-items: start;
        }

        .sticky-intro {
            position: sticky;
            top: 180px;
        }

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

        .capability-item {
            display: grid;
            grid-template-columns: 54px 1fr auto;
            gap: 22px;
            align-items: start;
            padding: 30px 0;
            border-bottom: 1px solid var(--line);
            transition: padding var(--transition), border-color var(--transition);
        }

        .capability-item:hover {
            padding-left: 12px;
            border-color: var(--orange);
        }

        .cap-index {
            color: var(--orange);
            font-weight: 850;
        }

        .capability-item h3 {
            margin-bottom: 8px;
            font-size: 1.26rem;
        }

        .capability-item p {
            color: var(--muted);
            font-size: .93rem;
        }

        .cap-arrow {
            font-size: 1.4rem;
            line-height: 1;
        }

        .metric-board {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            background: var(--dark);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-dark);
            overflow: hidden;
        }

        .metric-cell {
            min-height: 210px;
            padding: 31px;
            color: #fff;
            border-right: 1px solid rgba(255,255,255,.1);
        }

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

        .metric-value {
            display: block;
            margin-bottom: 30px;
            color: var(--lime);
            font-size: clamp(2rem, 4vw, 3.6rem);
            font-weight: 900;
            letter-spacing: -.07em;
            line-height: 1;
        }

        .metric-cell h3 {
            margin-bottom: 9px;
            font-size: 1rem;
        }

        .metric-cell p {
            color: rgba(255,255,255,.57);
            font-size: .82rem;
            line-height: 1.65;
        }

        .scene-grid {
            display: grid;
            grid-template-columns: 1.25fr .75fr;
            gap: 18px;
        }

        .scene-column {
            display: grid;
            gap: 18px;
        }

        .scene-card {
            position: relative;
            min-height: 250px;
            padding: 34px;
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
        }

        .scene-card:hover {
            z-index: 2;
            border-color: var(--line-strong);
            box-shadow: var(--shadow-md);
            transform: translateY(-6px);
        }

        .scene-card.large {
            min-height: 518px;
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            color: #fff;
            background: var(--dark);
        }

        .scene-card.large::before {
            position: absolute;
            top: -100px;
            right: -80px;
            width: 340px;
            height: 340px;
            content: "";
            background:
                radial-gradient(circle at center, transparent 0 30%, rgba(200,243,91,.15) 31% 45%, transparent 46% 58%, rgba(200,243,91,.1) 59% 70%, transparent 71%);
        }

        .scene-icon {
            display: grid;
            width: 54px;
            height: 54px;
            margin-bottom: 46px;
            place-items: center;
            color: var(--ink);
            background: var(--lime);
            border-radius: 17px;
            font-size: 1.25rem;
            font-weight: 900;
        }

        .scene-card h3 {
            margin-bottom: 12px;
            font-size: 1.55rem;
        }

        .scene-card p {
            max-width: 520px;
            color: var(--muted);
            font-size: .94rem;
        }

        .scene-card.large p {
            color: rgba(255,255,255,.66);
        }

        .solution-tabs {
            display: flex;
            flex-wrap: wrap;
            gap: 9px;
            margin-bottom: 30px;
        }

        .solution-tab {
            padding: 9px 15px;
            color: var(--ink-soft);
            background: transparent;
            border: 1px solid var(--line);
            border-radius: 999px;
            font-size: .85rem;
            font-weight: 750;
        }

        .solution-tab.active,
        .solution-tab:hover {
            color: var(--ink);
            background: var(--lime);
            border-color: var(--lime);
        }

        .solution-grid {
            display: grid;
            grid-template-columns: repeat(12, 1fr);
            gap: 18px;
        }

        .solution-card {
            grid-column: span 4;
            min-height: 310px;
            display: flex;
            flex-direction: column;
            padding: 29px;
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            transition: transform var(--transition), box-shadow var(--transition);
        }

        .solution-card:nth-child(1),
        .solution-card:nth-child(4) {
            grid-column: span 6;
        }

        .solution-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
        }

        .solution-card .badge-soft {
            align-self: flex-start;
            margin-bottom: 40px;
        }

        .solution-card h3 {
            margin-bottom: 12px;
            font-size: 1.45rem;
        }

        .solution-card p {
            color: var(--muted);
            font-size: .92rem;
        }

        .solution-list {
            margin: auto 0 0;
            padding: 22px 0 0;
            list-style: none;
            border-top: 1px solid var(--line);
        }

        .solution-list li {
            position: relative;
            padding-left: 18px;
            color: var(--ink-soft);
            font-size: .84rem;
        }

        .solution-list li + li {
            margin-top: 7px;
        }

        .solution-list li::before {
            position: absolute;
            top: .68em;
            left: 0;
            width: 6px;
            height: 6px;
            content: "";
            background: var(--orange);
            border-radius: 50%;
        }

        .trust-wall {
            display: grid;
            grid-template-columns: 1fr 2fr;
            gap: 70px;
            align-items: center;
        }

        .trust-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            border-top: 1px solid rgba(255,255,255,.18);
            border-left: 1px solid rgba(255,255,255,.18);
        }

        .trust-item {
            min-height: 180px;
            padding: 28px;
            border-right: 1px solid rgba(255,255,255,.18);
            border-bottom: 1px solid rgba(255,255,255,.18);
        }

        .trust-mark {
            display: inline-grid;
            width: 40px;
            height: 40px;
            margin-bottom: 26px;
            place-items: center;
            color: var(--dark);
            background: var(--lime);
            border-radius: 50%;
            font-weight: 900;
        }

        .trust-item h3 {
            margin-bottom: 8px;
            font-size: 1.05rem;
        }

        .trust-item p {
            color: rgba(255,255,255,.58);
            font-size: .82rem;
            line-height: 1.65;
        }

        .process-track {
            position: relative;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }

        .process-track::before {
            position: absolute;
            top: 34px;
            right: 8%;
            left: 8%;
            height: 1px;
            content: "";
            background: var(--line-strong);
        }

        .process-step {
            position: relative;
            z-index: 1;
        }

        .step-number {
            display: grid;
            width: 68px;
            height: 68px;
            margin-bottom: 27px;
            place-items: center;
            background: var(--paper);
            border: 1px solid var(--line-strong);
            border-radius: 50%;
            font-weight: 900;
            box-shadow: 0 0 0 10px var(--paper);
            transition: background var(--transition), color var(--transition), transform var(--transition);
        }

        .process-step:hover .step-number {
            color: var(--ink);
            background: var(--lime);
            transform: scale(1.08);
        }

        .process-step h3 {
            margin-bottom: 10px;
            font-size: 1.2rem;
        }

        .process-step p {
            color: var(--muted);
            font-size: .88rem;
        }

        .compare-panel {
            display: grid;
            grid-template-columns: .72fr 1.28fr;
            gap: 18px;
        }

        .compare-intro {
            padding: 38px;
            color: #fff;
            background: var(--orange);
            border-radius: var(--radius-lg);
        }

        .compare-intro .section-title {
            font-size: clamp(2rem, 4vw, 3.8rem);
        }

        .compare-intro p {
            color: rgba(255,255,255,.78);
        }

        .compare-list {
            padding: 12px 36px;
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-lg);
        }

        .compare-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 34px;
            padding: 26px 0;
            border-bottom: 1px solid var(--line);
        }

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

        .compare-side {
            position: relative;
            padding-left: 24px;
        }

        .compare-side::before {
            position: absolute;
            top: 8px;
            left: 0;
            width: 10px;
            height: 10px;
            content: "";
            background: #c9cdcf;
            border-radius: 50%;
        }

        .compare-side.highlight::before {
            background: var(--lime-deep);
            box-shadow: 0 0 0 6px rgba(157,201,47,.12);
        }

        .compare-side strong {
            display: block;
            margin-bottom: 5px;
            font-size: .92rem;
        }

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

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

        .milestone-chart {
            position: relative;
            height: 380px;
            padding: 34px;
            background: var(--dark);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-dark);
            overflow: hidden;
        }

        .chart-grid {
            position: absolute;
            inset: 34px;
            background:
                linear-gradient(rgba(255,255,255,.07) 1px, transparent 1px) 0 0 / 100% 25%,
                linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px) 0 0 / 25% 100%;
        }

        .chart-line {
            position: absolute;
            right: 12%;
            bottom: 22%;
            left: 10%;
            height: 46%;
            border-top: 4px solid var(--lime);
            border-radius: 50% 70% 0 0;
            transform: skewY(-15deg);
            filter: drop-shadow(0 8px 18px rgba(200,243,91,.27));
        }

        .chart-point {
            position: absolute;
            width: 17px;
            height: 17px;
            background: var(--lime);
            border: 4px solid var(--dark);
            border-radius: 50%;
            box-shadow: 0 0 0 2px var(--lime);
        }

        .point-a { left: 15%; bottom: 22%; }
        .point-b { left: 44%; bottom: 36%; }
        .point-c { right: 14%; top: 25%; }

        .chart-caption {
            position: absolute;
            right: 32px;
            bottom: 26px;
            left: 32px;
            display: flex;
            justify-content: space-between;
            color: rgba(255,255,255,.55);
            font-size: .76rem;
            font-weight: 750;
        }

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

        .milestone-list li {
            display: grid;
            grid-template-columns: 90px 1fr;
            gap: 20px;
            padding: 22px 0;
            border-bottom: 1px solid var(--line);
        }

        .milestone-list time {
            color: var(--orange);
            font-weight: 850;
        }

        .milestone-list strong {
            display: block;
            margin-bottom: 6px;
        }

        .milestone-list p {
            color: var(--muted);
            font-size: .86rem;
        }

        .case-feature {
            display: grid;
            grid-template-columns: 1.05fr .95fr;
            min-height: 480px;
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
        }

        .case-visual {
            position: relative;
            min-height: 430px;
            background:
                radial-gradient(circle at 20% 25%, rgba(200,243,91,.9) 0 10%, transparent 10.5%),
                radial-gradient(circle at 72% 40%, rgba(255,118,87,.88) 0 13%, transparent 13.5%),
                radial-gradient(circle at 45% 78%, rgba(115,168,255,.85) 0 11%, transparent 11.5%),
                var(--dark);
            overflow: hidden;
        }

        .case-visual::before,
        .case-visual::after {
            position: absolute;
            content: "";
            border: 1px solid rgba(255,255,255,.28);
            border-radius: 50%;
        }

        .case-visual::before {
            inset: 13%;
        }

        .case-visual::after {
            inset: 26%;
        }

        .case-chip {
            position: absolute;
            padding: 10px 14px;
            color: #fff;
            background: rgba(255,255,255,.11);
            border: 1px solid rgba(255,255,255,.2);
            border-radius: 999px;
            font-size: .76rem;
            font-weight: 750;
            backdrop-filter: blur(8px);
        }

        .chip-one { top: 16%; left: 13%; }
        .chip-two { top: 43%; right: 12%; }
        .chip-three { bottom: 16%; left: 28%; }

        .case-copy {
            display: flex;
            flex-direction: column;
            justify-content: center;
            padding: clamp(34px, 6vw, 72px);
        }

        .case-copy h3 {
            margin: 18px 0;
            font-size: clamp(1.7rem, 3vw, 2.8rem);
        }

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

        .case-results {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 12px;
            margin-top: 30px;
        }

        .case-result {
            padding: 16px;
            background: var(--paper);
            border-radius: var(--radius-sm);
        }

        .case-result strong {
            display: block;
            margin-bottom: 5px;
            font-size: .9rem;
        }

        .case-result span {
            color: var(--muted);
            font-size: .78rem;
        }

        .news-layout {
            display: grid;
            grid-template-columns: 1fr 1.35fr;
            gap: 55px;
        }

        .news-feature {
            min-height: 440px;
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            padding: 38px;
            color: #fff;
            background: var(--dark);
            border-radius: var(--radius-lg);
            overflow: hidden;
        }

        .news-feature::before {
            position: absolute;
            top: -40px;
            right: -60px;
            width: 250px;
            height: 250px;
            content: "";
            background: var(--blue);
            border-radius: 45% 55% 62% 38%;
            opacity: .48;
            transform: rotate(22deg);
        }

        .news-feature {
            position: relative;
        }

        .news-feature > * {
            position: relative;
            z-index: 1;
        }

        .news-feature h3 {
            margin: 20px 0 12px;
            font-size: 2rem;
        }

        .news-feature p {
            color: rgba(255,255,255,.64);
        }

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

        .news-item {
            display: grid;
            grid-template-columns: 92px 1fr auto;
            gap: 22px;
            align-items: center;
            padding: 25px 0;
            border-bottom: 1px solid var(--line);
        }

        .news-date {
            color: var(--muted);
            font-size: .78rem;
            font-weight: 750;
        }

        .news-item h3 {
            margin-bottom: 6px;
            font-size: 1.08rem;
        }

        .news-item p {
            color: var(--muted);
            font-size: .82rem;
        }

        .news-arrow {
            display: grid;
            width: 38px;
            height: 38px;
            place-items: center;
            border: 1px solid var(--line);
            border-radius: 50%;
            transition: background var(--transition), transform var(--transition);
        }

        .news-item:hover .news-arrow {
            background: var(--lime);
            border-color: var(--lime);
            transform: translateX(4px);
        }

        .support-band {
            display: grid;
            grid-template-columns: 1.15fr repeat(3, .62fr);
            gap: 1px;
            background: var(--line);
            border: 1px solid var(--line);
            border-radius: var(--radius-lg);
            overflow: hidden;
        }

        .support-intro,
        .support-card {
            padding: 32px;
            background: var(--surface);
        }

        .support-intro h2 {
            font-size: clamp(1.8rem, 3vw, 3rem);
        }

        .support-intro p,
        .support-card p {
            color: var(--muted);
            font-size: .86rem;
        }

        .support-card strong {
            display: block;
            margin: 20px 0 9px;
        }

        .support-symbol {
            color: var(--orange);
            font-size: 1.8rem;
            font-weight: 900;
        }

        .answer-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 18px;
        }

        .answer-card {
            display: grid;
            grid-template-columns: 52px 1fr;
            gap: 19px;
            padding: 27px;
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
        }

        .answer-q {
            display: grid;
            width: 52px;
            height: 52px;
            place-items: center;
            color: var(--ink);
            background: var(--lime);
            border-radius: 16px;
            font-weight: 900;
        }

        .answer-card h3 {
            margin-bottom: 8px;
            font-size: 1.08rem;
        }

        .answer-card p {
            color: var(--muted);
            font-size: .87rem;
        }

        .faq-layout {
            display: grid;
            grid-template-columns: .7fr 1.3fr;
            gap: 72px;
        }

        .accordion {
            --bs-accordion-bg: transparent;
            --bs-accordion-border-color: var(--line);
            --bs-accordion-btn-focus-box-shadow: none;
            --bs-accordion-active-bg: transparent;
            --bs-accordion-active-color: var(--ink);
        }

        .accordion-item {
            border-right: 0;
            border-left: 0;
        }

        .accordion-button {
            padding: 24px 4px;
            color: var(--ink);
            background: transparent;
            font-weight: 800;
        }

        .accordion-button:not(.collapsed) {
            color: var(--ink);
            box-shadow: none;
        }

        .accordion-button::after {
            padding: 14px;
            background-color: var(--surface);
            background-position: center;
            border-radius: 50%;
        }

        .accordion-body {
            padding: 0 42px 25px 4px;
            color: var(--muted);
            font-size: .92rem;
        }

        .inquiry-shell {
            position: relative;
            padding: clamp(34px, 7vw, 80px);
            color: #fff;
            background: var(--dark);
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-dark);
            overflow: hidden;
        }

        .inquiry-shell::before {
            position: absolute;
            right: -160px;
            bottom: -230px;
            width: 520px;
            height: 520px;
            content: "";
            border: 95px solid rgba(200,243,91,.1);
            border-radius: 50%;
        }

        .inquiry-grid {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: .82fr 1.18fr;
            gap: 80px;
        }

        .inquiry-copy h2 {
            margin-bottom: 20px;
            font-size: clamp(2.3rem, 5vw, 4.8rem);
            line-height: 1.02;
        }

        .inquiry-copy p {
            color: rgba(255,255,255,.64);
        }

        .contact-points {
            margin: 34px 0 0;
            padding: 0;
            list-style: none;
        }

        .contact-points li {
            display: flex;
            gap: 12px;
            align-items: center;
            padding: 11px 0;
            color: rgba(255,255,255,.76);
            border-bottom: 1px solid rgba(255,255,255,.1);
            font-size: .87rem;
        }

        .contact-points li::before {
            width: 7px;
            height: 7px;
            content: "";
            background: var(--lime);
            border-radius: 50%;
        }

        .inquiry-form {
            padding: 34px;
            color: var(--ink);
            background: var(--surface);
            border-radius: var(--radius-lg);
        }

        .form-label {
            margin-bottom: 7px;
            font-size: .8rem;
            font-weight: 800;
        }

        .form-control,
        .form-select {
            min-height: 50px;
            padding: 11px 14px;
            color: var(--ink);
            background-color: var(--paper);
            border: 1px solid transparent;
            border-radius: var(--radius-sm);
        }

        .form-control:hover,
        .form-select:hover {
            border-color: var(--line-strong);
        }

        .form-control:focus,
        .form-select:focus {
            background: #fff;
            border-color: var(--blue);
        }

        textarea.form-control {
            min-height: 112px;
            resize: vertical;
        }

        .form-check-input {
            margin-top: .42em;
            border-color: var(--line-strong);
        }

        .form-check-input:checked {
            background-color: var(--ink);
            border-color: var(--ink);
        }

        .privacy-copy {
            color: var(--muted);
            font-size: .76rem;
            line-height: 1.6;
        }

        .form-message {
            display: none;
            margin-top: 14px;
            padding: 12px 15px;
            color: #254200;
            background: #e7fac0;
            border-radius: var(--radius-sm);
            font-size: .83rem;
            font-weight: 700;
        }

        .site-footer {
            padding: 66px 0 30px;
            color: rgba(255,255,255,.68);
            background: #0b0f10;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr .5fr .7fr;
            gap: 70px;
            padding-bottom: 48px;
        }

        .footer-brand {
            color: #fff;
            font-size: 1.5rem;
            font-weight: 900;
            letter-spacing: -.04em;
        }

        .footer-about {
            max-width: 530px;
            margin-top: 18px;
            font-size: .9rem;
        }

        .footer-title {
            margin-bottom: 17px;
            color: #fff;
            font-size: .83rem;
            font-weight: 850;
            letter-spacing: .08em;
        }

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

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

        .footer-links a {
            color: rgba(255,255,255,.62);
            font-size: .88rem;
        }

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

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            gap: 24px;
            padding-top: 25px;
            border-top: 1px solid rgba(255,255,255,.1);
            font-size: .75rem;
        }

        .reveal {
            opacity: 0;
            transform: translateY(22px);
            transition: opacity 700ms ease, transform 700ms ease;
        }

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

        @media (prefers-reduced-motion: reduce) {
            *, *::before, *::after {
                scroll-behavior: auto !important;
                transition-duration: .01ms !important;
                animation-duration: .01ms !important;
            }

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

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

            .hero-main-card {
                width: 82%;
            }

            .hero-side-card {
                width: 270px;
            }

            .capability-layout,
            .trust-wall,
            .milestone-wrap,
            .faq-layout {
                gap: 42px;
            }

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

            .metric-cell:nth-child(2) {
                border-right: 0;
            }

            .metric-cell:nth-child(-n+2) {
                border-bottom: 1px solid rgba(255,255,255,.1);
            }

            .solution-card {
                grid-column: span 6;
            }

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

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

            .inquiry-grid {
                gap: 45px;
            }
        }

        @media (max-width: 768px) {
            html {
                scroll-padding-top: 88px;
            }

            .container {
                width: min(100% - 28px, 1180px);
            }

            .brand-row {
                min-height: 74px;
            }

            .logo-subtitle,
            .site-search,
            .channel-note {
                display: none;
            }

            .navbar-toggler {
                display: block;
            }

            .channel-row {
                position: absolute;
                top: 74px;
                right: 0;
                left: 0;
                background: rgba(245,244,239,.98);
                box-shadow: var(--shadow-sm);
            }

            .channel-nav {
                display: block;
                min-height: 0;
                padding: 13px 0 18px;
            }

            .channel-list {
                flex-direction: column;
                align-items: stretch;
            }

            .channel-link {
                width: 100%;
                justify-content: space-between;
                padding: 11px 14px;
                border-radius: 12px;
            }

            .channel-link.active::after {
                top: 50%;
                right: 15px;
                bottom: auto;
                left: auto;
                width: 7px;
                height: 7px;
                transform: translateY(-50%);
                border-radius: 50%;
            }

            .hero {
                padding: 42px 0 75px;
            }

            .hero-stack {
                min-height: auto;
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }

            .hero-main-card {
                grid-column: 1 / -1;
                width: 100%;
                min-height: 520px;
                border-radius: 30px;
            }

            .hero-side-card {
                position: relative;
                inset: auto;
                width: auto;
                min-height: 235px;
                transform: none;
            }

            .capability-layout,
            .scene-grid,
            .trust-wall,
            .compare-panel,
            .milestone-wrap,
            .case-feature,
            .news-layout,
            .faq-layout,
            .inquiry-grid {
                grid-template-columns: 1fr;
            }

            .sticky-intro {
                position: static;
            }

            .scene-card.large {
                min-height: 420px;
            }

            .solution-card,
            .solution-card:nth-child(1),
            .solution-card:nth-child(4) {
                grid-column: span 6;
            }

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

            .process-track::before {
                display: none;
            }

            .compare-intro {
                min-height: 330px;
            }

            .case-visual {
                min-height: 390px;
            }

            .support-band {
                grid-template-columns: 1fr 1fr;
            }

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

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

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

            .footer-grid > div:first-child {
                grid-column: 1 / -1;
            }
        }

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

            .section {
                padding: 68px 0;
            }

            .section-title {
                font-size: 2.25rem;
            }

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

            .hero-main-card {
                min-height: auto;
                padding: 34px 24px 46px;
            }

            .hero h1 {
                font-size: 2.8rem;
            }

            .hero-copy {
                font-size: .94rem;
            }

            .hero-side-card {
                min-height: 210px;
            }

            .capability-item {
                grid-template-columns: 38px 1fr;
                gap: 12px;
            }

            .cap-arrow {
                display: none;
            }

            .metric-board,
            .trust-grid,
            .case-results,
            .support-band {
                grid-template-columns: 1fr;
            }

            .metric-cell {
                min-height: 170px;
                border-right: 0;
                border-bottom: 1px solid rgba(255,255,255,.1);
            }

            .solution-card,
            .solution-card:nth-child(1),
            .solution-card:nth-child(4) {
                grid-column: 1 / -1;
            }

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

            .process-step {
                display: grid;
                grid-template-columns: 60px 1fr;
                gap: 18px;
            }

            .step-number {
                width: 56px;
                height: 56px;
                margin-bottom: 0;
                box-shadow: none;
            }

            .compare-list {
                padding: 8px 22px;
            }

            .compare-row {
                grid-template-columns: 1fr;
                gap: 15px;
            }

            .milestone-list li {
                grid-template-columns: 70px 1fr;
            }

            .news-item {
                grid-template-columns: 72px 1fr;
            }

            .news-arrow {
                display: none;
            }

            .support-intro,
            .support-card {
                grid-column: 1;
            }

            .answer-card {
                grid-template-columns: 1fr;
            }

            .inquiry-shell {
                padding: 30px 18px;
                border-radius: 28px;
            }

            .inquiry-form {
                padding: 24px 18px;
            }

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

            .footer-grid > div:first-child {
                grid-column: auto;
            }

            .footer-bottom {
                flex-direction: column;
            }
        }

/* roulang page: category1 */
:root {
            --ink: #101416;
            --ink-soft: #40494d;
            --muted: #6e787d;
            --paper: #f5f4ef;
            --surface: #ffffff;
            --surface-soft: #ecebe5;
            --line: rgba(16, 20, 22, .12);
            --line-strong: rgba(16, 20, 22, .22);
            --lime: #c8f35b;
            --lime-deep: #9dc92f;
            --orange: #ff7657;
            --blue: #73a8ff;
            --dark: #111719;
            --radius-sm: 12px;
            --radius-md: 20px;
            --radius-lg: 30px;
            --radius-xl: 42px;
            --shadow-sm: 0 12px 30px rgba(16, 20, 22, .07);
            --shadow-md: 0 22px 55px rgba(16, 20, 22, .11);
            --shadow-dark: 0 24px 70px rgba(0, 0, 0, .23);
            --transition: 220ms cubic-bezier(.2, .8, .2, 1);
        }

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

        html {
            scroll-behavior: smooth;
            scroll-padding-top: 145px;
        }

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

        body::selection {
            color: var(--ink);
            background: var(--lime);
        }

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

        h1,
        h2,
        h3 {
            font-weight: 900;
            letter-spacing: -.045em;
        }

        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,
        textarea {
            font: inherit;
        }

        button {
            border: 0;
        }

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

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

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

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

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

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

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

        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 9px;
            margin-bottom: 18px;
            color: var(--ink-soft);
            font-size: .78rem;
            font-weight: 800;
            letter-spacing: .13em;
        }

        .eyebrow::before {
            width: 26px;
            height: 2px;
            content: "";
            background: var(--orange);
        }

        .section-dark .eyebrow {
            color: rgba(255, 255, 255, .66);
        }

        .section-title {
            max-width: 800px;
            margin-bottom: 20px;
            font-size: clamp(2.05rem, 4.4vw, 4.2rem);
            line-height: 1.05;
        }

        .section-lead {
            max-width: 760px;
            margin-bottom: 44px;
            color: var(--muted);
            font-size: 1.06rem;
        }

        .section-dark .section-lead {
            color: rgba(255, 255, 255, .65);
        }

        .badge-soft {
            display: inline-flex;
            align-items: center;
            padding: 7px 12px;
            color: var(--ink);
            background: var(--lime);
            border-radius: 999px;
            font-size: .75rem;
            font-weight: 800;
            letter-spacing: .04em;
        }

        .btn-c7,
        .btn-light-c7,
        .btn-outline-c7 {
            display: inline-flex;
            min-height: 48px;
            align-items: center;
            justify-content: center;
            gap: 9px;
            padding: 11px 20px;
            border-radius: 999px;
            font-weight: 800;
            transition: all var(--transition);
        }

        .btn-c7 {
            color: #fff;
            background: var(--ink);
            border: 1px solid var(--ink);
        }

        .btn-c7:hover {
            color: var(--ink);
            background: var(--lime);
            border-color: var(--lime);
            transform: translateY(-2px);
            box-shadow: var(--shadow-sm);
        }

        .btn-light-c7 {
            color: var(--ink);
            background: var(--lime);
            border: 1px solid var(--lime);
        }

        .btn-light-c7:hover {
            color: #fff;
            background: var(--orange);
            border-color: var(--orange);
            transform: translateY(-2px);
        }

        .btn-outline-c7 {
            color: var(--ink);
            background: transparent;
            border: 1px solid var(--line-strong);
        }

        .btn-outline-c7:hover {
            color: var(--ink);
            background: #fff;
            border-color: var(--ink);
            transform: translateY(-2px);
        }

        .btn-c7:active,
        .btn-light-c7:active,
        .btn-outline-c7:active {
            transform: translateY(0);
        }

        .btn-c7:focus-visible,
        .btn-light-c7:focus-visible,
        .btn-outline-c7:focus-visible,
        .channel-link:focus-visible,
        .brand-logo:focus-visible,
        .search-field:focus-visible,
        .search-button:focus-visible,
        .news-link:focus-visible,
        .footer-links a:focus-visible,
        .form-control:focus,
        .form-select:focus,
        .form-check-input:focus,
        .accordion-button:focus {
            outline: 3px solid rgba(115, 168, 255, .42);
            outline-offset: 3px;
            box-shadow: none;
        }

        /* Header */
        .site-header {
            position: sticky;
            z-index: 1030;
            top: 0;
            background: rgba(245, 244, 239, .92);
            border-bottom: 1px solid var(--line);
            backdrop-filter: blur(18px);
        }

        .brand-row {
            min-height: 86px;
            display: flex;
            align-items: center;
        }

        .brand-layout {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 30px;
        }

        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            flex: 0 0 auto;
        }

        .logo-mark {
            position: relative;
            display: grid;
            width: 48px;
            height: 48px;
            place-items: center;
            color: var(--lime);
            background: var(--ink);
            border-radius: 15px;
            font-size: 1.15rem;
            font-weight: 900;
            letter-spacing: -.06em;
            box-shadow: 7px 7px 0 var(--lime);
        }

        .logo-text {
            line-height: 1.15;
        }

        .logo-title {
            display: block;
            font-size: 1.05rem;
            font-weight: 900;
            letter-spacing: -.04em;
        }

        .logo-subtitle {
            display: block;
            margin-top: 5px;
            color: var(--muted);
            font-size: .68rem;
            font-weight: 700;
            letter-spacing: .12em;
        }

        .site-search {
            display: flex;
            width: min(520px, 52vw);
            padding: 5px;
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: 999px;
            box-shadow: 0 8px 24px rgba(16, 20, 22, .04);
        }

        .search-field {
            min-width: 0;
            flex: 1;
            padding: 10px 15px;
            color: var(--ink);
            background: transparent;
            border: 0;
            outline: 0;
        }

        .search-field::placeholder {
            color: #8b9396;
        }

        .search-button {
            flex: 0 0 auto;
            padding: 9px 17px;
            color: #fff;
            background: var(--ink);
            border-radius: 999px;
            font-size: .88rem;
            font-weight: 800;
            transition: all var(--transition);
        }

        .search-button:hover {
            color: var(--ink);
            background: var(--lime);
        }

        .navbar-toggler {
            display: none;
            width: 46px;
            height: 46px;
            padding: 0;
            background: var(--ink);
            border-radius: 14px;
        }

        .toggle-lines,
        .toggle-lines::before,
        .toggle-lines::after {
            position: relative;
            display: block;
            width: 20px;
            height: 2px;
            margin: auto;
            content: "";
            background: #fff;
            transition: transform var(--transition);
        }

        .toggle-lines::before {
            position: absolute;
            top: -6px;
        }

        .toggle-lines::after {
            position: absolute;
            top: 6px;
        }

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

        .channel-nav {
            min-height: 53px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }

        .channel-list {
            display: flex;
            align-items: center;
            gap: 7px;
            margin: 0;
            padding: 0;
            list-style: none;
        }

        .channel-link {
            display: block;
            padding: 8px 16px;
            color: var(--ink-soft);
            border-radius: 999px;
            font-size: .9rem;
            font-weight: 800;
        }

        .channel-link:hover {
            color: var(--ink);
            background: rgba(255, 255, 255, .8);
        }

        .channel-link.active {
            color: var(--ink);
            background: var(--lime);
        }

        .channel-note {
            color: var(--muted);
            font-size: .78rem;
            font-weight: 700;
            letter-spacing: .06em;
        }

        /* Hero */
        .ai-hero {
            position: relative;
            padding: 52px 0 90px;
            overflow: hidden;
        }

        .ai-hero::before {
            position: absolute;
            top: 70px;
            right: -150px;
            width: 520px;
            height: 520px;
            content: "";
            background: radial-gradient(circle, rgba(200, 243, 91, .32), rgba(200, 243, 91, 0) 68%);
            pointer-events: none;
        }

        .flash-strip {
            position: relative;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 22px;
            margin-bottom: 58px;
            padding: 16px 20px;
            color: #fff;
            background: var(--dark);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-dark);
        }

        .flash-copy {
            display: flex;
            align-items: center;
            gap: 13px;
            font-weight: 800;
        }

        .flash-dot {
            width: 9px;
            height: 9px;
            background: var(--orange);
            border-radius: 50%;
            box-shadow: 0 0 0 7px rgba(255, 118, 87, .14);
            animation: pulse 1.8s infinite;
        }

        @keyframes pulse {
            50% {
                box-shadow: 0 0 0 12px rgba(255, 118, 87, 0);
            }
        }

        .countdown {
            display: flex;
            align-items: center;
            gap: 7px;
        }

        .time-unit {
            min-width: 48px;
            padding: 5px 8px;
            color: var(--ink);
            background: var(--lime);
            border-radius: 10px;
            text-align: center;
            font-variant-numeric: tabular-nums;
            font-weight: 900;
        }

        .hero-grid {
            position: relative;
            display: grid;
            grid-template-columns: minmax(0, 1.16fr) minmax(340px, .84fr);
            gap: 62px;
            align-items: center;
        }

        .hero-kicker {
            display: flex;
            flex-wrap: wrap;
            gap: 9px;
            margin-bottom: 25px;
        }

        .hero-title {
            max-width: 760px;
            margin-bottom: 28px;
            font-size: clamp(3rem, 7.5vw, 7.2rem);
            line-height: .94;
        }

        .hero-title span {
            display: block;
            color: transparent;
            -webkit-text-stroke: 1.5px var(--ink);
        }

        .hero-summary {
            max-width: 690px;
            margin-bottom: 34px;
            color: var(--ink-soft);
            font-size: clamp(1.03rem, 1.5vw, 1.2rem);
        }

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

        .offer-card {
            position: relative;
            padding: 34px;
            color: #fff;
            background: var(--dark);
            border: 1px solid rgba(255, 255, 255, .1);
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-dark);
            overflow: hidden;
        }

        .offer-card::after {
            position: absolute;
            right: -65px;
            bottom: -80px;
            width: 230px;
            height: 230px;
            content: "";
            background: var(--lime);
            border-radius: 50%;
            opacity: .16;
        }

        .offer-label {
            display: inline-flex;
            margin-bottom: 30px;
            padding: 7px 12px;
            color: var(--ink);
            background: var(--orange);
            border-radius: 999px;
            font-size: .76rem;
            font-weight: 900;
        }

        .offer-card h2 {
            position: relative;
            z-index: 1;
            margin-bottom: 16px;
            font-size: 2rem;
        }

        .offer-card p {
            position: relative;
            z-index: 1;
            color: rgba(255, 255, 255, .66);
        }

        .offer-list {
            position: relative;
            z-index: 1;
            display: grid;
            gap: 12px;
            margin: 26px 0 30px;
            padding: 0;
            list-style: none;
        }

        .offer-list li {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .offer-list li::before {
            display: grid;
            width: 23px;
            height: 23px;
            place-items: center;
            color: var(--ink);
            content: "✓";
            background: var(--lime);
            border-radius: 50%;
            font-size: .75rem;
            font-weight: 900;
        }

        /* Metrics */
        .metrics-board {
            display: grid;
            grid-template-columns: 1.2fr repeat(3, 1fr);
            border: 1px solid var(--line);
            border-radius: var(--radius-lg);
            background: var(--surface);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
        }

        .metrics-intro,
        .metric-item {
            min-height: 210px;
            padding: 31px;
        }

        .metrics-intro {
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            color: #fff;
            background: var(--dark);
        }

        .metrics-intro h2 {
            margin-bottom: 0;
            font-size: 2rem;
        }

        .metric-item {
            border-left: 1px solid var(--line);
        }

        .metric-number {
            display: block;
            margin: 24px 0 12px;
            font-size: clamp(2.5rem, 5vw, 4.8rem);
            line-height: 1;
            font-weight: 900;
            letter-spacing: -.08em;
        }

        .metric-item p {
            margin: 0;
            color: var(--muted);
        }

        /* Service matrix */
        .matrix-layout {
            display: grid;
            grid-template-columns: .76fr 1.24fr;
            gap: 58px;
            align-items: start;
        }

        .sticky-copy {
            position: sticky;
            top: 170px;
        }

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

        .service-card {
            display: grid;
            grid-template-columns: 66px 1fr auto;
            gap: 20px;
            align-items: center;
            padding: 25px;
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            transition: all var(--transition);
        }

        .service-card:hover {
            border-color: var(--line-strong);
            box-shadow: var(--shadow-sm);
            transform: translateX(7px);
        }

        .service-icon {
            display: grid;
            width: 66px;
            height: 66px;
            place-items: center;
            color: var(--ink);
            background: var(--surface-soft);
            border-radius: 20px;
            font-size: 1.45rem;
            font-weight: 900;
        }

        .service-card:nth-child(2) .service-icon {
            background: var(--lime);
        }

        .service-card:nth-child(3) .service-icon {
            background: #d9e6ff;
        }

        .service-card:nth-child(4) .service-icon {
            background: #ffe0d8;
        }

        .service-card h3 {
            margin-bottom: 5px;
            font-size: 1.15rem;
        }

        .service-card p {
            margin: 0;
            color: var(--muted);
            font-size: .93rem;
        }

        .service-state {
            color: var(--ink-soft);
            font-size: .75rem;
            font-weight: 900;
            white-space: nowrap;
        }

        /* Comparison */
        .compare-shell {
            display: grid;
            grid-template-columns: .72fr 1.28fr;
            gap: 48px;
            align-items: stretch;
        }

        .compare-quote {
            display: flex;
            min-height: 100%;
            flex-direction: column;
            justify-content: space-between;
            padding: 38px;
            color: #fff;
            background: var(--dark);
            border-radius: var(--radius-lg);
        }

        .compare-quote strong {
            display: block;
            max-width: 390px;
            font-size: clamp(1.8rem, 3vw, 3rem);
            line-height: 1.12;
            letter-spacing: -.05em;
        }

        .compare-grid {
            display: grid;
            gap: 12px;
        }

        .compare-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
        }

        .compare-cell {
            padding: 24px;
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
        }

        .compare-cell.highlight {
            background: var(--lime);
            border-color: var(--lime-deep);
        }

        .compare-cell small {
            display: block;
            margin-bottom: 8px;
            color: var(--muted);
            font-weight: 800;
        }

        .compare-cell.highlight small {
            color: var(--ink-soft);
        }

        .compare-cell strong {
            display: block;
            font-size: 1.06rem;
        }

        /* Milestones */
        .milestone-track {
            position: relative;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 0;
            margin-top: 52px;
        }

        .milestone-track::before {
            position: absolute;
            top: 18px;
            right: 8%;
            left: 8%;
            height: 1px;
            content: "";
            background: rgba(255, 255, 255, .2);
        }

        .milestone {
            position: relative;
            padding: 0 25px;
        }

        .milestone-dot {
            position: relative;
            z-index: 1;
            display: block;
            width: 37px;
            height: 37px;
            margin-bottom: 28px;
            background: var(--dark);
            border: 9px solid var(--lime);
            border-radius: 50%;
        }

        .milestone h3 {
            margin-bottom: 10px;
            font-size: 1.15rem;
        }

        .milestone p {
            margin: 0;
            color: rgba(255, 255, 255, .6);
            font-size: .92rem;
        }

        /* News */
        .news-layout {
            display: grid;
            grid-template-columns: 1.05fr .95fr;
            gap: 32px;
        }

        .featured-news {
            display: flex;
            min-height: 440px;
            flex-direction: column;
            justify-content: space-between;
            padding: 42px;
            color: #fff;
            background:
                radial-gradient(circle at 80% 15%, rgba(200, 243, 91, .24), transparent 34%),
                var(--dark);
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-md);
        }

        .featured-news h3 {
            max-width: 570px;
            margin-bottom: 18px;
            font-size: clamp(2rem, 4vw, 3.6rem);
            line-height: 1.04;
        }

        .featured-news p {
            max-width: 580px;
            color: rgba(255, 255, 255, .65);
        }

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

        .news-link {
            display: grid;
            grid-template-columns: 82px 1fr auto;
            gap: 19px;
            align-items: center;
            padding: 22px;
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
        }

        .news-link:hover {
            border-color: var(--ink);
            box-shadow: var(--shadow-sm);
            transform: translateY(-3px);
        }

        .news-date {
            color: var(--muted);
            font-size: .78rem;
            font-weight: 800;
        }

        .news-link h3 {
            margin: 0;
            font-size: 1.03rem;
            line-height: 1.4;
        }

        .news-arrow {
            display: grid;
            width: 35px;
            height: 35px;
            place-items: center;
            background: var(--surface-soft);
            border-radius: 50%;
            font-weight: 900;
        }

        /* Assurance */
        .assurance-grid {
            display: grid;
            grid-template-columns: 1.15fr .85fr;
            gap: 22px;
        }

        .assurance-main,
        .assurance-side {
            padding: 40px;
            border-radius: var(--radius-lg);
        }

        .assurance-main {
            background: var(--lime);
        }

        .assurance-side {
            color: #fff;
            background: var(--dark);
        }

        .assurance-main h2,
        .assurance-side h3 {
            margin-bottom: 18px;
        }

        .assurance-main h2 {
            max-width: 650px;
            font-size: clamp(2.1rem, 4vw, 4rem);
            line-height: 1.04;
        }

        .assurance-points {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 12px;
            margin-top: 30px;
        }

        .assurance-point {
            padding: 18px;
            background: rgba(255, 255, 255, .58);
            border: 1px solid rgba(16, 20, 22, .12);
            border-radius: var(--radius-sm);
            font-weight: 800;
        }

        .assurance-side ul {
            display: grid;
            gap: 18px;
            margin: 26px 0 0;
            padding: 0;
            list-style: none;
        }

        .assurance-side li {
            padding-bottom: 18px;
            color: rgba(255, 255, 255, .68);
            border-bottom: 1px solid rgba(255, 255, 255, .12);
        }

        /* Quick answers */
        .answer-tabs {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 28px;
        }

        .answer-tabs .nav-link {
            padding: 9px 16px;
            color: var(--ink-soft);
            background: var(--surface-soft);
            border-radius: 999px;
            font-weight: 800;
        }

        .answer-tabs .nav-link:hover,
        .answer-tabs .nav-link.active {
            color: var(--ink);
            background: var(--lime);
        }

        .answer-panel {
            display: grid;
            grid-template-columns: .68fr 1.32fr;
            gap: 40px;
            padding: 38px;
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
        }

        .answer-index {
            display: flex;
            min-height: 220px;
            flex-direction: column;
            justify-content: space-between;
            padding: 27px;
            background: var(--surface-soft);
            border-radius: var(--radius-md);
        }

        .answer-index strong {
            font-size: 4.5rem;
            line-height: 1;
            letter-spacing: -.09em;
        }

        .answer-content h3 {
            margin-bottom: 16px;
            font-size: 1.8rem;
        }

        .answer-content p {
            color: var(--muted);
        }

        .answer-list {
            display: grid;
            gap: 10px;
            margin: 24px 0 0;
            padding: 0;
            list-style: none;
        }

        .answer-list li {
            display: flex;
            gap: 10px;
            padding: 13px 0;
            border-top: 1px solid var(--line);
        }

        .answer-list li::before {
            color: var(--lime-deep);
            content: "●";
        }

        /* FAQ */
        .faq-layout {
            display: grid;
            grid-template-columns: .72fr 1.28fr;
            gap: 60px;
            align-items: start;
        }

        .accordion {
            --bs-accordion-bg: transparent;
            --bs-accordion-border-color: var(--line);
            --bs-accordion-btn-focus-box-shadow: none;
            --bs-accordion-active-bg: transparent;
            --bs-accordion-active-color: var(--ink);
        }

        .accordion-item {
            border-width: 0 0 1px;
        }

        .accordion-button {
            padding: 24px 0;
            color: var(--ink);
            background: transparent;
            font-size: 1.08rem;
            font-weight: 900;
        }

        .accordion-button:not(.collapsed) {
            box-shadow: none;
        }

        .accordion-button::after {
            padding: 17px;
            background-color: var(--lime);
            background-position: center;
            border-radius: 50%;
        }

        .accordion-body {
            padding: 0 45px 25px 0;
            color: var(--muted);
        }

        /* Form */
        .conversion-shell {
            position: relative;
            display: grid;
            grid-template-columns: .82fr 1.18fr;
            gap: 54px;
            padding: 58px;
            color: #fff;
            background: var(--dark);
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-dark);
            overflow: hidden;
        }

        .conversion-shell::before {
            position: absolute;
            top: -130px;
            left: -120px;
            width: 360px;
            height: 360px;
            content: "";
            background: var(--orange);
            border-radius: 50%;
            opacity: .1;
        }

        .conversion-copy,
        .request-form {
            position: relative;
            z-index: 1;
        }

        .conversion-copy h2 {
            margin-bottom: 20px;
            font-size: clamp(2.2rem, 4vw, 4.3rem);
            line-height: 1;
        }

        .conversion-copy p {
            color: rgba(255, 255, 255, .65);
        }

        .conversion-meta {
            display: grid;
            gap: 11px;
            margin-top: 32px;
        }

        .conversion-meta span {
            display: flex;
            align-items: center;
            gap: 10px;
            color: rgba(255, 255, 255, .75);
        }

        .conversion-meta span::before {
            width: 8px;
            height: 8px;
            content: "";
            background: var(--lime);
            border-radius: 50%;
        }

        .request-form {
            padding: 30px;
            color: var(--ink);
            background: #fff;
            border-radius: var(--radius-lg);
        }

        .form-label {
            margin-bottom: 7px;
            font-size: .84rem;
            font-weight: 850;
        }

        .form-control,
        .form-select {
            min-height: 51px;
            padding: 11px 14px;
            color: var(--ink);
            background-color: var(--paper);
            border: 1px solid var(--line);
            border-radius: var(--radius-sm);
        }

        textarea.form-control {
            min-height: 112px;
            resize: vertical;
        }

        .form-control:hover,
        .form-select:hover {
            border-color: var(--line-strong);
        }

        .form-check-input {
            border-color: var(--line-strong);
        }

        .form-check-input:checked {
            background-color: var(--ink);
            border-color: var(--ink);
        }

        .form-text {
            color: var(--muted);
            font-size: .76rem;
        }

        .form-status {
            display: none;
            margin-top: 15px;
            padding: 12px 14px;
            color: var(--ink);
            background: var(--lime);
            border-radius: var(--radius-sm);
            font-size: .88rem;
            font-weight: 800;
        }

        /* Footer */
        .site-footer {
            padding: 74px 0 28px;
            color: rgba(255, 255, 255, .72);
            background: #090d0e;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr .7fr .7fr;
            gap: 60px;
            padding-bottom: 52px;
        }

        .footer-brand {
            margin-bottom: 15px;
            color: #fff;
            font-size: 1.5rem;
            font-weight: 900;
            letter-spacing: -.05em;
        }

        .footer-about {
            max-width: 570px;
            margin: 0;
            color: rgba(255, 255, 255, .55);
        }

        .footer-title {
            margin-bottom: 18px;
            color: #fff;
            font-size: .88rem;
            letter-spacing: .08em;
        }

        .footer-links {
            display: grid;
            gap: 11px;
            margin: 0;
            padding: 0;
            list-style: none;
        }

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

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            padding-top: 24px;
            color: rgba(255, 255, 255, .42);
            border-top: 1px solid rgba(255, 255, 255, .1);
            font-size: .8rem;
        }

        @media (max-width: 1024px) {
            .section {
                padding: 86px 0;
            }

            .hero-grid,
            .matrix-layout,
            .compare-shell,
            .news-layout,
            .assurance-grid,
            .faq-layout,
            .conversion-shell {
                grid-template-columns: 1fr;
            }

            .hero-grid {
                gap: 38px;
            }

            .sticky-copy {
                position: static;
            }

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

            .metric-item:nth-child(3) {
                border-left: 0;
                border-top: 1px solid var(--line);
            }

            .metric-item:nth-child(4) {
                border-top: 1px solid var(--line);
            }

            .milestone-track {
                grid-template-columns: repeat(2, 1fr);
                gap: 36px 0;
            }

            .milestone-track::before {
                display: none;
            }

            .conversion-shell {
                padding: 45px;
            }
        }

        @media (max-width: 767.98px) {
            html {
                scroll-padding-top: 90px;
            }

            .container {
                width: min(100% - 28px, 1180px);
            }

            .brand-row {
                min-height: 76px;
            }

            .brand-layout {
                gap: 14px;
            }

            .logo-mark {
                width: 42px;
                height: 42px;
                border-radius: 13px;
                box-shadow: 5px 5px 0 var(--lime);
            }

            .logo-subtitle,
            .site-search {
                display: none;
            }

            .navbar-toggler {
                display: block;
            }

            .channel-row {
                background: var(--paper);
            }

            .channel-nav {
                display: block;
                padding-top: 12px;
                padding-bottom: 16px;
            }

            .channel-list {
                display: grid;
                gap: 5px;
            }

            .channel-link {
                border-radius: 12px;
            }

            .channel-note {
                display: block;
                padding: 14px 16px 0;
            }

            .section {
                padding: 72px 0;
            }

            .section-compact {
                padding: 55px 0;
            }

            .ai-hero {
                padding: 30px 0 70px;
            }

            .flash-strip {
                align-items: flex-start;
                flex-direction: column;
                margin-bottom: 43px;
                border-radius: var(--radius-md);
            }

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

            .hero-title {
                font-size: clamp(2.9rem, 15vw, 5rem);
            }

            .offer-card {
                padding: 28px;
                border-radius: var(--radius-lg);
            }

            .metrics-board {
                grid-template-columns: 1fr;
            }

            .metrics-intro,
            .metric-item {
                min-height: auto;
                padding: 27px;
            }

            .metric-item,
            .metric-item:nth-child(3),
            .metric-item:nth-child(4) {
                border-top: 1px solid var(--line);
                border-left: 0;
            }

            .service-card {
                grid-template-columns: 54px 1fr;
            }

            .service-icon {
                width: 54px;
                height: 54px;
                border-radius: 16px;
            }

            .service-state {
                grid-column: 2;
            }

            .compare-row,
            .assurance-points,
            .answer-panel {
                grid-template-columns: 1fr;
            }

            .compare-quote,
            .featured-news,
            .assurance-main,
            .assurance-side {
                padding: 30px;
            }

            .milestone-track {
                grid-template-columns: 1fr;
            }

            .milestone {
                padding: 0;
            }

            .milestone-dot {
                margin-bottom: 15px;
            }

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

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

            .answer-panel {
                padding: 24px;
            }

            .answer-index {
                min-height: 150px;
            }

            .conversion-shell {
                gap: 34px;
                padding: 28px;
                border-radius: var(--radius-lg);
            }

            .request-form {
                padding: 23px;
            }

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

            .footer-grid > div:first-child {
                grid-column: 1 / -1;
            }

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

        @media (max-width: 520px) {
            .container {
                width: min(100% - 22px, 1180px);
            }

            .logo-title {
                font-size: .94rem;
            }

            .section-title {
                font-size: 2.25rem;
            }

            .hero-actions,
            .hero-actions .btn-c7,
            .hero-actions .btn-outline-c7 {
                width: 100%;
            }

            .countdown {
                width: 100%;
                justify-content: space-between;
            }

            .time-unit {
                min-width: 44px;
            }

            .offer-card .btn-light-c7 {
                width: 100%;
            }

            .compare-quote,
            .featured-news,
            .assurance-main,
            .assurance-side {
                padding: 25px;
            }

            .answer-tabs {
                flex-wrap: nowrap;
                padding-bottom: 8px;
                overflow-x: auto;
            }

            .answer-tabs .nav-link {
                white-space: nowrap;
            }

            .conversion-shell {
                padding: 21px;
            }

            .request-form {
                padding: 20px;
            }

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

            .footer-grid > div:first-child {
                grid-column: auto;
            }
        }

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

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

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