/* roulang page: index */
:root {
      --bg: #0b1020;
      --bg-soft: #111831;
      --surface: #ffffff;
      --surface-soft: #f7f8fc;
      --surface-deep: #eef2ff;
      --text: #151827;
      --muted: #60677c;
      --light-text: #e8ecff;
      --light-muted: #aab3d5;
      --primary: #7457ff;
      --primary-dark: #5233de;
      --secondary: #00d4ff;
      --accent: #ffb74a;
      --danger: #ff5b7e;
      --success: #34d399;
      --border: rgba(18, 24, 48, .12);
      --border-light: rgba(255,255,255,.14);
      --shadow-sm: 0 10px 30px rgba(21, 24, 39, .08);
      --shadow-md: 0 22px 60px rgba(23, 27, 51, .14);
      --shadow-glow: 0 24px 80px rgba(116, 87, 255, .32);
      --radius-sm: 12px;
      --radius: 20px;
      --radius-lg: 30px;
      --radius-xl: 42px;
      --container: 1180px;
      --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    html {
      scroll-behavior: smooth;
      text-size-adjust: 100%;
    }

    body {
      font-family: var(--font);
      color: var(--text);
      line-height: 1.7;
      background:
        radial-gradient(circle at 8% 2%, rgba(116, 87, 255, .18), transparent 32%),
        radial-gradient(circle at 95% 8%, rgba(0, 212, 255, .14), transparent 30%),
        linear-gradient(180deg, #fbfcff 0%, #f5f7ff 42%, #ffffff 100%);
      min-height: 100vh;
      overflow-x: hidden;
    }

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

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

    button, input, textarea, select {
      font: inherit;
    }

    button {
      border: 0;
      cursor: pointer;
    }

    input, textarea {
      width: 100%;
      border: 1px solid var(--border);
      outline: none;
      background: rgba(255,255,255,.92);
      color: var(--text);
      transition: border-color .2s ease, box-shadow .2s ease, background .2s ease;
    }

    input:focus, textarea:focus {
      border-color: rgba(116,87,255,.65);
      box-shadow: 0 0 0 4px rgba(116,87,255,.12);
      background: #fff;
    }

    ::selection {
      background: rgba(116,87,255,.22);
      color: var(--primary-dark);
    }

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

    .site-header {
      position: sticky;
      top: 0;
      z-index: 50;
      backdrop-filter: blur(18px);
      background: rgba(255,255,255,.82);
      border-bottom: 1px solid rgba(20, 28, 55, .08);
      box-shadow: 0 14px 34px rgba(20, 28, 55, .06);
    }

    .brand-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 22px;
      padding: 16px 0 12px;
    }

    .logo {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      min-width: max-content;
      font-weight: 900;
      letter-spacing: -.03em;
      font-size: 21px;
      color: var(--text);
    }

    .logo-mark {
      width: 42px;
      height: 42px;
      border-radius: 15px;
      display: grid;
      place-items: center;
      color: #fff;
      font-weight: 900;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      box-shadow: 0 14px 34px rgba(116, 87, 255, .35);
      position: relative;
      overflow: hidden;
    }

    .logo-mark::after {
      content: "";
      position: absolute;
      inset: -45% -20% auto auto;
      width: 36px;
      height: 80px;
      transform: rotate(28deg);
      background: rgba(255,255,255,.32);
    }

    .header-actions {
      display: flex;
      align-items: center;
      justify-content: flex-end;
      gap: 14px;
      flex: 1;
    }

    .search-box {
      width: min(420px, 100%);
      position: relative;
    }

    .search-box input {
      height: 44px;
      border-radius: 999px;
      padding: 0 48px 0 18px;
      background: rgba(247,248,252,.9);
    }

    .search-box span {
      position: absolute;
      right: 16px;
      top: 50%;
      transform: translateY(-50%);
      color: var(--muted);
      font-size: 14px;
      pointer-events: none;
    }

    .top-cta {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      height: 44px;
      padding: 0 18px;
      border-radius: 999px;
      background: linear-gradient(135deg, var(--primary), #9a69ff);
      color: #fff;
      font-weight: 800;
      box-shadow: 0 12px 26px rgba(116,87,255,.26);
      transition: transform .2s ease, box-shadow .2s ease, filter .2s ease;
      white-space: nowrap;
    }

    .top-cta:hover {
      transform: translateY(-2px);
      box-shadow: 0 18px 36px rgba(116,87,255,.34);
      filter: saturate(1.08);
    }

    .channel-row {
      border-top: 1px solid rgba(20, 28, 55, .07);
      overflow-x: auto;
      scrollbar-width: none;
    }

    .channel-row::-webkit-scrollbar {
      display: none;
    }

    .channel-nav {
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 10px 0 12px;
      min-width: max-content;
    }

    .channel-nav a {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 9px 16px;
      border-radius: 999px;
      color: #4b5268;
      font-weight: 800;
      font-size: 14px;
      transition: color .2s ease, background .2s ease, transform .2s ease;
    }

    .channel-nav a:hover,
    .channel-nav a.active {
      color: var(--primary-dark);
      background: rgba(116,87,255,.12);
      transform: translateY(-1px);
    }

    main {
      overflow: hidden;
    }

    .section {
      padding: 84px 0;
      position: relative;
    }

    .section-tight {
      padding: 58px 0;
    }

    .section-head {
      display: flex;
      align-items: flex-end;
      justify-content: space-between;
      gap: 28px;
      margin-bottom: 34px;
    }

    .section-kicker {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 8px 12px;
      border-radius: 999px;
      background: rgba(116,87,255,.1);
      color: var(--primary-dark);
      font-size: 13px;
      font-weight: 900;
      margin-bottom: 12px;
    }

    .section-title {
      font-size: clamp(28px, 4vw, 44px);
      line-height: 1.16;
      letter-spacing: -.04em;
      color: var(--text);
      max-width: 760px;
    }

    .section-desc {
      max-width: 520px;
      color: var(--muted);
      font-size: 16px;
    }

    .hero {
      padding: 54px 0 74px;
      color: var(--light-text);
      background:
        linear-gradient(180deg, rgba(11,16,32,.25), rgba(11,16,32,.95)),
        radial-gradient(circle at 22% 0%, rgba(116,87,255,.62), transparent 35%),
        radial-gradient(circle at 78% 16%, rgba(0,212,255,.35), transparent 36%),
        linear-gradient(135deg, #0b1020 0%, #171041 55%, #0d203f 100%);
      position: relative;
    }

    .hero::before {
      content: "";
      position: absolute;
      inset: 0;
      background-image:
        linear-gradient(rgba(255,255,255,.055) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.055) 1px, transparent 1px);
      background-size: 42px 42px;
      mask-image: linear-gradient(180deg, rgba(0,0,0,.8), transparent 88%);
      pointer-events: none;
    }

    .hero-wrap {
      position: relative;
      display: grid;
      grid-template-columns: minmax(0, 1.06fr) minmax(340px, .94fr);
      gap: 34px;
      align-items: stretch;
    }

    .hero-copy {
      min-height: 560px;
      padding: 48px;
      border-radius: var(--radius-xl);
      background: linear-gradient(135deg, rgba(255,255,255,.13), rgba(255,255,255,.055));
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-glow);
      overflow: hidden;
      position: relative;
    }

    .hero-copy::after {
      content: "";
      position: absolute;
      right: -120px;
      bottom: -170px;
      width: 360px;
      height: 360px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(0,212,255,.24), transparent 68%);
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      padding: 9px 13px;
      border-radius: 999px;
      background: rgba(255,255,255,.12);
      border: 1px solid rgba(255,255,255,.16);
      color: #fff;
      font-weight: 800;
      font-size: 14px;
      margin-bottom: 22px;
    }

    .pulse {
      width: 9px;
      height: 9px;
      border-radius: 50%;
      background: var(--success);
      box-shadow: 0 0 0 7px rgba(52,211,153,.16);
    }

    h1 {
      font-size: clamp(38px, 6.5vw, 74px);
      line-height: .98;
      letter-spacing: -.07em;
      max-width: 830px;
      margin-bottom: 24px;
      color: #fff;
    }

    .hero-lead {
      font-size: clamp(16px, 2vw, 20px);
      color: var(--light-muted);
      max-width: 760px;
      margin-bottom: 28px;
    }

    .hero-cta {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 13px;
      margin-bottom: 32px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 9px;
      min-height: 48px;
      padding: 0 20px;
      border-radius: 999px;
      font-weight: 900;
      border: 1px solid transparent;
      transition: transform .2s ease, box-shadow .2s ease, background .2s ease, color .2s ease, border-color .2s ease;
      user-select: none;
    }

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

    .btn:focus-visible,
    a:focus-visible,
    button:focus-visible {
      outline: 3px solid rgba(0,212,255,.38);
      outline-offset: 3px;
    }

    .btn-primary {
      color: #fff;
      background: linear-gradient(135deg, var(--primary), #a05cff);
      box-shadow: 0 18px 34px rgba(116,87,255,.34);
    }

    .btn-primary:hover {
      box-shadow: 0 24px 46px rgba(116,87,255,.42);
    }

    .btn-secondary {
      color: #fff;
      border-color: rgba(255,255,255,.2);
      background: rgba(255,255,255,.1);
    }

    .btn-secondary:hover {
      background: rgba(255,255,255,.16);
      border-color: rgba(255,255,255,.34);
    }

    .btn-light {
      color: var(--primary-dark);
      background: #fff;
      box-shadow: 0 16px 34px rgba(31,35,67,.12);
    }

    .btn-light:hover {
      box-shadow: 0 22px 46px rgba(31,35,67,.18);
    }

    .hero-data {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 12px;
      max-width: 760px;
    }

    .data-chip {
      border-radius: 22px;
      padding: 16px;
      background: rgba(255,255,255,.1);
      border: 1px solid rgba(255,255,255,.14);
    }

    .data-chip strong {
      display: block;
      color: #fff;
      font-size: 24px;
      line-height: 1.1;
      letter-spacing: -.03em;
    }

    .data-chip span {
      display: block;
      color: var(--light-muted);
      font-size: 13px;
      margin-top: 5px;
    }

    .lead-card {
      align-self: stretch;
      border-radius: var(--radius-xl);
      background: rgba(255,255,255,.94);
      color: var(--text);
      padding: 26px;
      box-shadow: 0 30px 90px rgba(4, 10, 30, .34);
      border: 1px solid rgba(255,255,255,.72);
      position: relative;
      overflow: hidden;
    }

    .lead-card::before {
      content: "";
      position: absolute;
      top: -130px;
      right: -120px;
      width: 260px;
      height: 260px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(116,87,255,.2), transparent 68%);
    }

    .whitepaper-cover {
      position: relative;
      min-height: 245px;
      border-radius: 28px;
      background:
        linear-gradient(140deg, rgba(116,87,255,.96), rgba(0,212,255,.78)),
        linear-gradient(45deg, #25145f, #0d203f);
      color: #fff;
      padding: 24px;
      overflow: hidden;
      margin-bottom: 18px;
    }

    .whitepaper-cover::after {
      content: "";
      position: absolute;
      right: -48px;
      bottom: -48px;
      width: 170px;
      height: 170px;
      border-radius: 42px;
      transform: rotate(18deg);
      background: rgba(255,255,255,.18);
      border: 1px solid rgba(255,255,255,.2);
    }

    .cover-label {
      display: inline-flex;
      align-items: center;
      padding: 7px 10px;
      border-radius: 999px;
      background: rgba(255,255,255,.18);
      border: 1px solid rgba(255,255,255,.2);
      font-size: 12px;
      font-weight: 900;
      margin-bottom: 24px;
    }

    .whitepaper-cover h2 {
      position: relative;
      z-index: 1;
      max-width: 290px;
      font-size: 30px;
      line-height: 1.14;
      letter-spacing: -.04em;
      margin-bottom: 16px;
    }

    .cover-meta {
      position: relative;
      z-index: 1;
      display: flex;
      gap: 8px;
      flex-wrap: wrap;
    }

    .cover-meta span {
      padding: 6px 9px;
      border-radius: 999px;
      background: rgba(11,16,32,.24);
      font-size: 12px;
      font-weight: 800;
    }

    .toc {
      display: grid;
      gap: 10px;
      margin: 18px 0;
    }

    .toc-item {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 12px;
      border-radius: 16px;
      background: var(--surface-soft);
      border: 1px solid rgba(18,24,48,.07);
    }

    .toc-num {
      width: 30px;
      height: 30px;
      border-radius: 10px;
      display: grid;
      place-items: center;
      color: #fff;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      font-weight: 900;
      font-size: 13px;
      flex: 0 0 auto;
    }

    .toc-item p {
      color: var(--muted);
      font-size: 14px;
      line-height: 1.5;
    }

    .lead-form {
      display: grid;
      gap: 11px;
      margin-top: 18px;
    }

    .lead-form input {
      height: 48px;
      border-radius: 16px;
      padding: 0 14px;
    }

    .form-note {
      color: var(--muted);
      font-size: 12px;
      line-height: 1.55;
    }

    .form-message {
      min-height: 22px;
      color: var(--primary-dark);
      font-weight: 800;
      font-size: 13px;
    }

    .stage {
      margin-top: -34px;
      position: relative;
      z-index: 2;
    }

    .stage-panel {
      border-radius: var(--radius-xl);
      background: rgba(255,255,255,.86);
      border: 1px solid rgba(18,24,48,.1);
      box-shadow: var(--shadow-md);
      padding: 22px;
      backdrop-filter: blur(16px);
    }

    .browser-bar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding: 0 4px 18px;
      border-bottom: 1px solid rgba(18,24,48,.08);
      margin-bottom: 20px;
    }

    .dots {
      display: flex;
      gap: 8px;
    }

    .dots i {
      width: 11px;
      height: 11px;
      border-radius: 50%;
      background: #ff657c;
    }

    .dots i:nth-child(2) { background: #ffc357; }
    .dots i:nth-child(3) { background: #35d39b; }

    .bar-title {
      color: var(--muted);
      font-weight: 800;
      font-size: 14px;
    }

    .dashboard {
      display: grid;
      grid-template-columns: 1.2fr .8fr;
      gap: 18px;
    }

    .screen-card {
      border-radius: 26px;
      background: linear-gradient(180deg, #121936, #0f1428);
      color: #fff;
      padding: 24px;
      min-height: 370px;
      position: relative;
      overflow: hidden;
      border: 1px solid rgba(255,255,255,.1);
    }

    .screen-card::after {
      content: "";
      position: absolute;
      inset: auto -70px -90px auto;
      width: 240px;
      height: 240px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(0,212,255,.25), transparent 68%);
    }

    .screen-top {
      display: flex;
      justify-content: space-between;
      gap: 16px;
      margin-bottom: 24px;
      position: relative;
      z-index: 1;
    }

    .screen-top h3 {
      font-size: 24px;
      letter-spacing: -.03em;
      line-height: 1.25;
    }

    .badge {
      display: inline-flex;
      align-items: center;
      gap: 7px;
      padding: 7px 11px;
      border-radius: 999px;
      font-size: 12px;
      font-weight: 900;
      white-space: nowrap;
    }

    .badge-hot {
      color: #321704;
      background: linear-gradient(135deg, #ffd27a, #ff9d55);
    }

    .badge-blue {
      color: #063248;
      background: linear-gradient(135deg, #7ee7ff, #a5f3fc);
    }

    .badge-purple {
      color: #fff;
      background: linear-gradient(135deg, var(--primary), #a66bff);
    }

    .metrics-grid {
      position: relative;
      z-index: 1;
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 14px;
      margin-bottom: 20px;
    }

    .metric {
      border-radius: 20px;
      padding: 18px;
      background: rgba(255,255,255,.08);
      border: 1px solid rgba(255,255,255,.1);
    }

    .metric strong {
      display: block;
      font-size: 30px;
      letter-spacing: -.04em;
      line-height: 1.1;
    }

    .metric span {
      color: var(--light-muted);
      font-size: 13px;
    }

    .timeline-lines {
      position: relative;
      z-index: 1;
      display: grid;
      gap: 10px;
      margin-top: 16px;
    }

    .line {
      height: 12px;
      border-radius: 999px;
      background: rgba(255,255,255,.09);
      overflow: hidden;
    }

    .line i {
      display: block;
      height: 100%;
      border-radius: inherit;
      background: linear-gradient(90deg, var(--primary), var(--secondary));
    }

    .side-stack {
      display: grid;
      gap: 18px;
    }

    .mini-panel {
      border-radius: 26px;
      padding: 22px;
      background: #fff;
      border: 1px solid rgba(18,24,48,.08);
      box-shadow: var(--shadow-sm);
    }

    .mini-panel h3 {
      font-size: 20px;
      margin-bottom: 10px;
      letter-spacing: -.03em;
    }

    .mini-panel p {
      color: var(--muted);
      font-size: 14px;
    }

    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 14px;
    }

    .tag {
      display: inline-flex;
      align-items: center;
      padding: 7px 10px;
      border-radius: 999px;
      background: var(--surface-deep);
      color: #4a36b0;
      font-weight: 800;
      font-size: 12px;
      transition: transform .2s ease, background .2s ease;
    }

    .tag:hover {
      transform: translateY(-2px);
      background: rgba(116,87,255,.16);
    }

    .service-grid {
      display: grid;
      grid-template-columns: 1.05fr .95fr;
      gap: 20px;
      align-items: stretch;
    }

    .feature-large,
    .feature-list-card,
    .comparison-card,
    .step-card,
    .quote-card,
    .pricing-card,
    .faq-item,
    .update-card,
    .download-card {
      border-radius: var(--radius-lg);
      background: rgba(255,255,255,.88);
      border: 1px solid rgba(18,24,48,.09);
      box-shadow: var(--shadow-sm);
    }

    .feature-large {
      padding: 30px;
      background:
        linear-gradient(135deg, rgba(116,87,255,.12), rgba(0,212,255,.08)),
        #fff;
    }

    .feature-large h3 {
      font-size: 30px;
      line-height: 1.2;
      letter-spacing: -.04em;
      margin: 16px 0 12px;
    }

    .feature-large p,
    .comparison-card p,
    .step-card p,
    .quote-card p,
    .pricing-card p,
    .update-card p {
      color: var(--muted);
    }

    .feature-points {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 12px;
      margin-top: 22px;
    }

    .point {
      display: flex;
      gap: 10px;
      align-items: flex-start;
      padding: 14px;
      border-radius: 18px;
      background: rgba(255,255,255,.78);
      border: 1px solid rgba(18,24,48,.08);
    }

    .point i {
      width: 24px;
      height: 24px;
      border-radius: 9px;
      display: grid;
      place-items: center;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      color: #fff;
      font-style: normal;
      font-size: 13px;
      font-weight: 900;
      flex: 0 0 auto;
    }

    .point span {
      font-size: 14px;
      font-weight: 800;
      color: #30364b;
    }

    .feature-list-card {
      padding: 24px;
      display: grid;
      gap: 14px;
    }

    .matrix-item {
      display: grid;
      grid-template-columns: 48px 1fr;
      gap: 14px;
      align-items: start;
      padding: 16px;
      border-radius: 20px;
      background: var(--surface-soft);
      transition: transform .2s ease, background .2s ease, box-shadow .2s ease;
    }

    .matrix-item:hover {
      transform: translateY(-3px);
      background: #fff;
      box-shadow: 0 16px 34px rgba(21,24,39,.08);
    }

    .matrix-icon {
      width: 48px;
      height: 48px;
      border-radius: 17px;
      display: grid;
      place-items: center;
      color: #fff;
      font-weight: 900;
      background: linear-gradient(135deg, var(--primary), #00b7ff);
    }

    .matrix-item h3 {
      font-size: 18px;
      margin-bottom: 3px;
    }

    .matrix-item p {
      color: var(--muted);
      font-size: 14px;
      line-height: 1.55;
    }

    .compare-wrap {
      display: grid;
      grid-template-columns: .9fr 1.1fr;
      gap: 22px;
      align-items: stretch;
    }

    .comparison-card {
      padding: 26px;
      overflow: hidden;
      position: relative;
    }

    .comparison-card.dark {
      color: #fff;
      background:
        radial-gradient(circle at 85% 20%, rgba(0,212,255,.22), transparent 38%),
        linear-gradient(135deg, #111831, #20164c);
    }

    .comparison-card.dark p,
    .comparison-card.dark .compare-row span {
      color: var(--light-muted);
    }

    .compare-table {
      display: grid;
      gap: 10px;
      margin-top: 18px;
    }

    .compare-row {
      display: grid;
      grid-template-columns: 1fr auto;
      gap: 14px;
      align-items: center;
      padding: 13px 14px;
      border-radius: 16px;
      background: rgba(255,255,255,.09);
      border: 1px solid rgba(255,255,255,.1);
    }

    .comparison-card:not(.dark) .compare-row {
      background: var(--surface-soft);
      border-color: rgba(18,24,48,.08);
    }

    .compare-row strong {
      font-size: 15px;
    }

    .compare-row span {
      color: var(--muted);
      font-size: 13px;
      font-weight: 800;
    }

    .steps {
      display: grid;
      grid-template-columns: .86fr 1.14fr;
      gap: 22px;
      align-items: stretch;
    }

    .step-card {
      padding: 26px;
      position: relative;
      overflow: hidden;
    }

    .step-card.highlight {
      color: #fff;
      background:
        linear-gradient(135deg, rgba(116,87,255,.92), rgba(0,212,255,.68)),
        #121936;
      box-shadow: var(--shadow-glow);
    }

    .step-card.highlight p {
      color: rgba(255,255,255,.82);
    }

    .step-card h3 {
      font-size: 26px;
      letter-spacing: -.03em;
      line-height: 1.2;
      margin: 14px 0 10px;
    }

    .step-num {
      width: 48px;
      height: 48px;
      border-radius: 17px;
      display: grid;
      place-items: center;
      background: rgba(255,255,255,.16);
      color: #fff;
      font-weight: 900;
      border: 1px solid rgba(255,255,255,.18);
    }

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

    .step-list .step-card {
      display: grid;
      grid-template-columns: 54px 1fr;
      gap: 14px;
      padding: 20px;
    }

    .step-list .step-num {
      background: linear-gradient(135deg, var(--primary), var(--secondary));
    }

    .clips {
      padding-bottom: 18px;
    }

    .clip-track {
      display: grid;
      grid-auto-flow: column;
      grid-auto-columns: minmax(260px, 330px);
      gap: 16px;
      overflow-x: auto;
      padding: 4px 2px 18px;
      scroll-snap-type: x mandatory;
      scrollbar-color: rgba(116,87,255,.36) transparent;
    }

    .clip-card {
      scroll-snap-align: start;
      min-height: 210px;
      border-radius: 28px;
      padding: 20px;
      color: #fff;
      background:
        linear-gradient(180deg, rgba(11,16,32,.1), rgba(11,16,32,.82)),
        radial-gradient(circle at 25% 18%, rgba(255,255,255,.28), transparent 22%),
        linear-gradient(135deg, #6c49ff, #0ab8db);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      position: relative;
      overflow: hidden;
    }

    .clip-card:nth-child(2) { background: linear-gradient(180deg, rgba(11,16,32,.05), rgba(11,16,32,.84)), linear-gradient(135deg, #ff7a83, #6d5cff); }
    .clip-card:nth-child(3) { background: linear-gradient(180deg, rgba(11,16,32,.05), rgba(11,16,32,.84)), linear-gradient(135deg, #1f9cff, #34d399); }
    .clip-card:nth-child(4) { background: linear-gradient(180deg, rgba(11,16,32,.05), rgba(11,16,32,.84)), linear-gradient(135deg, #ffb74a, #9b5cff); }

    .clip-card::after {
      content: "▶";
      position: absolute;
      right: 18px;
      top: 18px;
      width: 44px;
      height: 44px;
      border-radius: 50%;
      display: grid;
      place-items: center;
      background: rgba(255,255,255,.18);
      border: 1px solid rgba(255,255,255,.22);
      backdrop-filter: blur(8px);
      font-size: 15px;
    }

    .clip-card h3 {
      font-size: 22px;
      line-height: 1.25;
      max-width: 230px;
      letter-spacing: -.03em;
    }

    .clip-card p {
      color: rgba(255,255,255,.78);
      font-size: 14px;
      max-width: 250px;
    }

    .updates {
      display: grid;
      grid-template-columns: .9fr 1.1fr;
      gap: 22px;
      align-items: start;
    }

    .update-card {
      padding: 26px;
    }

    .changelog {
      position: relative;
      display: grid;
      gap: 16px;
      padding-left: 24px;
    }

    .changelog::before {
      content: "";
      position: absolute;
      left: 7px;
      top: 8px;
      bottom: 8px;
      width: 2px;
      background: linear-gradient(180deg, var(--primary), rgba(0,212,255,.2));
      border-radius: 99px;
    }

    .change {
      position: relative;
      padding: 18px;
      border-radius: 22px;
      background: #fff;
      border: 1px solid rgba(18,24,48,.08);
      box-shadow: var(--shadow-sm);
    }

    .change::before {
      content: "";
      position: absolute;
      left: -23px;
      top: 24px;
      width: 12px;
      height: 12px;
      border-radius: 50%;
      background: var(--secondary);
      box-shadow: 0 0 0 5px rgba(0,212,255,.16);
    }

    .change h3 {
      font-size: 18px;
      margin-bottom: 5px;
    }

    .change p {
      color: var(--muted);
      font-size: 14px;
    }

    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 18px;
    }

    .pricing-card {
      padding: 24px;
      position: relative;
      transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
    }

    .pricing-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
      border-color: rgba(116,87,255,.25);
    }

    .pricing-card.recommend {
      background:
        radial-gradient(circle at 90% 10%, rgba(0,212,255,.18), transparent 35%),
        linear-gradient(135deg, rgba(116,87,255,.12), #fff);
      border-color: rgba(116,87,255,.25);
      box-shadow: 0 22px 56px rgba(116,87,255,.16);
    }

    .pricing-card h3 {
      font-size: 22px;
      letter-spacing: -.03em;
      margin: 12px 0 8px;
    }

    .price {
      display: flex;
      align-items: baseline;
      gap: 5px;
      margin: 16px 0;
    }

    .price strong {
      font-size: 36px;
      letter-spacing: -.05em;
    }

    .price span {
      color: var(--muted);
      font-size: 13px;
    }

    .check-list {
      display: grid;
      gap: 10px;
      margin: 16px 0 22px;
    }

    .check-list li {
      list-style: none;
      display: flex;
      gap: 9px;
      align-items: flex-start;
      color: #3f465d;
      font-size: 14px;
    }

    .check-list li::before {
      content: "✓";
      color: var(--success);
      font-weight: 900;
    }

    .quotes {
      display: grid;
      grid-template-columns: 1.1fr .9fr;
      gap: 22px;
    }

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

    .quote-card {
      padding: 22px;
      transition: transform .2s ease, box-shadow .2s ease;
    }

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

    .quote-card p {
      font-size: 15px;
      margin-bottom: 16px;
    }

    .quote-user {
      display: flex;
      align-items: center;
      gap: 10px;
      color: var(--muted);
      font-size: 13px;
      font-weight: 800;
    }

    .avatar {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      display: grid;
      place-items: center;
      color: #fff;
      font-weight: 900;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
    }

    .mouth-strip {
      border-radius: var(--radius-lg);
      padding: 28px;
      color: #fff;
      background:
        radial-gradient(circle at 20% 0%, rgba(255,255,255,.22), transparent 30%),
        linear-gradient(135deg, #121936, #30205f);
      box-shadow: var(--shadow-md);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      min-height: 100%;
    }

    .mouth-strip h3 {
      font-size: 30px;
      line-height: 1.16;
      letter-spacing: -.04em;
      margin-bottom: 12px;
    }

    .mouth-strip p {
      color: var(--light-muted);
    }

    .strip-stats {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 12px;
      margin-top: 22px;
    }

    .strip-stats div {
      padding: 14px;
      border-radius: 18px;
      background: rgba(255,255,255,.09);
      border: 1px solid rgba(255,255,255,.12);
    }

    .strip-stats strong {
      display: block;
      font-size: 24px;
      color: #fff;
    }

    .strip-stats span {
      color: var(--light-muted);
      font-size: 12px;
    }

    .insights-grid {
      display: grid;
      grid-template-columns: 1fr 1fr 1fr;
      gap: 18px;
    }

    .insight-card {
      border-radius: var(--radius-lg);
      padding: 24px;
      background: #fff;
      border: 1px solid rgba(18,24,48,.08);
      box-shadow: var(--shadow-sm);
      position: relative;
      overflow: hidden;
    }

    .insight-card::before {
      content: "“";
      position: absolute;
      right: 18px;
      top: -26px;
      font-size: 110px;
      line-height: 1;
      color: rgba(116,87,255,.1);
      font-family: Georgia, serif;
    }

    .insight-card h3 {
      font-size: 20px;
      line-height: 1.25;
      margin: 14px 0 10px;
      letter-spacing: -.03em;
    }

    .insight-card p {
      color: var(--muted);
      font-size: 14px;
    }

    .news-layout {
      display: grid;
      grid-template-columns: 1.25fr .75fr;
      gap: 22px;
      align-items: start;
    }

    .news-list,
    .recommend-box {
      border-radius: var(--radius-lg);
      background: #fff;
      border: 1px solid rgba(18,24,48,.08);
      box-shadow: var(--shadow-sm);
      overflow: hidden;
    }

    .news-item {
      display: grid;
      grid-template-columns: 120px 1fr auto;
      gap: 18px;
      align-items: center;
      padding: 20px;
      border-bottom: 1px solid rgba(18,24,48,.08);
      transition: background .2s ease;
    }

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

    .news-item:hover {
      background: var(--surface-soft);
    }

    .news-date {
      display: grid;
      gap: 4px;
      color: var(--primary-dark);
      font-weight: 900;
    }

    .news-date span {
      color: var(--muted);
      font-size: 12px;
      font-weight: 800;
    }

    .news-item h3 {
      font-size: 18px;
      line-height: 1.35;
      margin-bottom: 5px;
    }

    .news-item p {
      color: var(--muted);
      font-size: 14px;
      line-height: 1.55;
    }

    .arrow {
      width: 34px;
      height: 34px;
      border-radius: 50%;
      display: grid;
      place-items: center;
      background: rgba(116,87,255,.1);
      color: var(--primary-dark);
      font-weight: 900;
      transition: transform .2s ease, background .2s ease;
    }

    .news-item:hover .arrow {
      transform: translateX(4px);
      background: rgba(116,87,255,.18);
    }

    .recommend-box {
      padding: 24px;
      position: sticky;
      top: 128px;
    }

    .recommend-box h3 {
      font-size: 22px;
      margin-bottom: 12px;
      letter-spacing: -.03em;
    }

    .seed-list {
      display: grid;
      gap: 11px;
      margin-top: 16px;
    }

    .seed-list li {
      list-style: none;
      padding: 13px;
      border-radius: 16px;
      background: var(--surface-soft);
      color: #3e455c;
      font-weight: 800;
      font-size: 14px;
    }

    .faq-wrap {
      display: grid;
      grid-template-columns: .85fr 1.15fr;
      gap: 22px;
      align-items: start;
    }

    .faq-intro {
      border-radius: var(--radius-lg);
      padding: 28px;
      color: #fff;
      background:
        radial-gradient(circle at 20% 0%, rgba(0,212,255,.25), transparent 28%),
        linear-gradient(135deg, #161e3e, #1f1451);
      box-shadow: var(--shadow-md);
    }

    .faq-intro h2 {
      font-size: 34px;
      line-height: 1.15;
      letter-spacing: -.04em;
      margin: 14px 0 12px;
    }

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

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

    .faq-item {
      padding: 20px 22px;
    }

    .faq-item summary {
      cursor: pointer;
      list-style: none;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      font-weight: 900;
      color: #242a3e;
    }

    .faq-item summary::-webkit-details-marker {
      display: none;
    }

    .faq-item summary::after {
      content: "+";
      width: 28px;
      height: 28px;
      border-radius: 50%;
      display: grid;
      place-items: center;
      background: rgba(116,87,255,.1);
      color: var(--primary-dark);
      flex: 0 0 auto;
      transition: transform .2s ease, background .2s ease;
    }

    .faq-item[open] summary::after {
      content: "−";
      background: rgba(116,87,255,.18);
      transform: rotate(180deg);
    }

    .faq-item p {
      color: var(--muted);
      margin-top: 12px;
      font-size: 15px;
    }

    .download {
      padding-bottom: 96px;
    }

    .download-card {
      padding: 34px;
      display: grid;
      grid-template-columns: 1fr 410px;
      gap: 28px;
      align-items: center;
      background:
        radial-gradient(circle at 88% 18%, rgba(0,212,255,.2), transparent 32%),
        linear-gradient(135deg, rgba(116,87,255,.14), rgba(255,255,255,.95) 45%),
        #fff;
      overflow: hidden;
    }

    .download-card h2 {
      font-size: clamp(30px, 4vw, 48px);
      line-height: 1.12;
      letter-spacing: -.05em;
      margin: 12px 0 14px;
    }

    .download-card p {
      color: var(--muted);
      max-width: 650px;
      margin-bottom: 22px;
    }

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

    .download-form {
      border-radius: 28px;
      padding: 22px;
      background: rgba(255,255,255,.82);
      border: 1px solid rgba(18,24,48,.1);
      box-shadow: var(--shadow-sm);
      display: grid;
      gap: 12px;
    }

    .download-form label {
      color: #2f354a;
      font-weight: 900;
      font-size: 14px;
    }

    .download-form input,
    .download-form textarea {
      border-radius: 16px;
      padding: 12px 14px;
    }

    .download-form textarea {
      min-height: 88px;
      resize: vertical;
    }

    .site-footer {
      color: var(--light-muted);
      background:
        radial-gradient(circle at 18% 0%, rgba(116,87,255,.28), transparent 32%),
        linear-gradient(135deg, #0b1020, #111831);
      padding: 52px 0 28px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.1fr .9fr;
      gap: 28px;
      align-items: start;
      padding-bottom: 30px;
      border-bottom: 1px solid rgba(255,255,255,.1);
    }

    .footer-logo {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      color: #fff;
      font-size: 20px;
      font-weight: 900;
      letter-spacing: -.03em;
      margin-bottom: 14px;
    }

    .footer-logo .logo-mark {
      width: 40px;
      height: 40px;
    }

    .footer-desc {
      max-width: 680px;
      color: var(--light-muted);
    }

    .footer-links {
      display: flex;
      justify-content: flex-end;
      gap: 12px;
      flex-wrap: wrap;
    }

    .footer-links a {
      padding: 9px 13px;
      border-radius: 999px;
      background: rgba(255,255,255,.08);
      border: 1px solid rgba(255,255,255,.1);
      transition: background .2s ease, color .2s ease, transform .2s ease;
    }

    .footer-links a:hover {
      color: #fff;
      background: rgba(255,255,255,.14);
      transform: translateY(-2px);
    }

    .copyright {
      display: flex;
      justify-content: space-between;
      gap: 18px;
      flex-wrap: wrap;
      padding-top: 22px;
      font-size: 13px;
    }

    .floating-cta {
      position: fixed;
      left: 50%;
      bottom: 18px;
      transform: translateX(-50%);
      z-index: 40;
      width: min(100% - 28px, 720px);
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 14px;
      padding: 12px 14px 12px 18px;
      border-radius: 999px;
      color: #fff;
      background: rgba(17,24,49,.86);
      border: 1px solid rgba(255,255,255,.14);
      box-shadow: 0 18px 50px rgba(4,10,30,.28);
      backdrop-filter: blur(16px);
    }

    .floating-cta strong {
      font-size: 14px;
    }

    .floating-cta span {
      color: var(--light-muted);
      font-size: 13px;
    }

    .floating-cta .btn {
      min-height: 40px;
      padding: 0 16px;
      font-size: 14px;
    }

    @media (max-width: 1024px) {
      .hero-wrap,
      .dashboard,
      .service-grid,
      .compare-wrap,
      .steps,
      .updates,
      .quotes,
      .news-layout,
      .faq-wrap,
      .download-card,
      .footer-grid {
        grid-template-columns: 1fr;
      }

      .hero-copy {
        min-height: auto;
      }

      .recommend-box {
        position: static;
      }

      .pricing-grid,
      .insights-grid {
        grid-template-columns: 1fr 1fr;
      }

      .download-form {
        max-width: 560px;
      }
    }

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

      .brand-row {
        align-items: flex-start;
        flex-direction: column;
        gap: 12px;
      }

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

      .search-box {
        flex: 1;
      }

      .top-cta {
        padding: 0 14px;
      }

      .section {
        padding: 64px 0;
      }

      .section-head {
        align-items: flex-start;
        flex-direction: column;
        margin-bottom: 26px;
      }

      .hero {
        padding-top: 32px;
      }

      .hero-copy,
      .lead-card,
      .download-card {
        border-radius: 30px;
        padding: 24px;
      }

      .hero-data,
      .metrics-grid,
      .feature-points,
      .quote-wall,
      .pricing-grid,
      .insights-grid,
      .strip-stats {
        grid-template-columns: 1fr;
      }

      .news-item {
        grid-template-columns: 1fr;
        gap: 9px;
      }

      .arrow {
        display: none;
      }

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

      .floating-cta {
        border-radius: 24px;
        align-items: flex-start;
        flex-direction: column;
      }

      .floating-cta .btn {
        width: 100%;
      }
    }

    @media (max-width: 520px) {
      .logo {
        font-size: 18px;
        white-space: normal;
      }

      .logo-mark {
        width: 38px;
        height: 38px;
        border-radius: 13px;
      }

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

      .top-cta {
        width: 100%;
      }

      h1 {
        font-size: 40px;
      }

      .hero-copy {
        padding: 20px;
      }

      .whitepaper-cover h2 {
        font-size: 25px;
      }

      .clip-track {
        grid-auto-columns: minmax(238px, 82vw);
      }

      .step-list .step-card,
      .matrix-item {
        grid-template-columns: 1fr;
      }

      .btn,
      .download-actions .btn {
        width: 100%;
      }

      .copyright {
        flex-direction: column;
      }
    }