/* roulang page: index */
:root {
      --bg: #07111f;
      --bg-soft: #0b1730;
      --bg-panel: rgba(14, 31, 59, 0.72);
      --panel-solid: #101f39;
      --panel-deep: #081426;
      --text: #eef5ff;
      --text-strong: #ffffff;
      --muted: #9fb1c9;
      --muted-2: #71839e;
      --line: rgba(155, 185, 226, 0.18);
      --line-strong: rgba(138, 184, 255, 0.34);
      --primary: #41d7ff;
      --primary-2: #6d7dff;
      --accent: #7cffc4;
      --warning: #ffd166;
      --danger: #ff6b88;
      --success: #58f0a7;
      --shadow: 0 24px 70px rgba(0, 0, 0, 0.35);
      --shadow-soft: 0 18px 42px rgba(5, 12, 25, 0.28);
      --glow: 0 0 28px rgba(65, 215, 255, 0.42);
      --radius-xl: 28px;
      --radius-lg: 22px;
      --radius-md: 16px;
      --radius-sm: 12px;
      --container: 1180px;
      --nav-height: 72px;
      --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    }

    * {
      box-sizing: border-box;
    }

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

    body {
      margin: 0;
      font-family: var(--font);
      color: var(--text);
      line-height: 1.75;
      background:
        radial-gradient(circle at 10% 4%, rgba(65, 215, 255, 0.20), transparent 30%),
        radial-gradient(circle at 88% 10%, rgba(109, 125, 255, 0.26), transparent 30%),
        linear-gradient(180deg, #06101f 0%, #07111f 42%, #081326 100%);
      overflow-x: hidden;
    }

    body::before {
      content: "";
      position: fixed;
      inset: 0;
      pointer-events: none;
      background-image:
        linear-gradient(rgba(255,255,255,0.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.035) 1px, transparent 1px);
      background-size: 42px 42px;
      mask-image: linear-gradient(to bottom, rgba(0,0,0,0.65), transparent 75%);
      z-index: -2;
    }

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

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

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

    button {
      cursor: pointer;
    }

    ::selection {
      color: #06101f;
      background: var(--primary);
    }

    .container {
      width: min(100% - 40px, var(--container));
      margin: 0 auto;
    }

    .skip-link {
      position: absolute;
      top: -80px;
      left: 16px;
      z-index: 1000;
      padding: 10px 14px;
      color: #06101f;
      background: var(--primary);
      border-radius: 10px;
      transition: top .2s ease;
    }

    .skip-link:focus {
      top: 14px;
      outline: 3px solid rgba(255,255,255,.55);
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 99;
      background: rgba(6, 16, 31, 0.86);
      backdrop-filter: blur(18px);
      border-bottom: 1px solid var(--line);
      box-shadow: 0 12px 34px rgba(0,0,0,.18);
    }

    .top-strip {
      background: linear-gradient(90deg, rgba(16, 39, 75, 0.9), rgba(9, 24, 47, 0.9));
      border-bottom: 1px solid rgba(255,255,255,0.06);
      color: #c7d6eb;
      font-size: 13px;
    }

    .top-strip .container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
      min-height: 34px;
    }

    .top-strip span {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      white-space: nowrap;
    }

    .top-dot {
      width: 7px;
      height: 7px;
      border-radius: 50%;
      background: var(--success);
      box-shadow: 0 0 14px rgba(88, 240, 167, 0.8);
    }

    .navbar {
      height: var(--nav-height);
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
    }

    .brand {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      min-width: 0;
      color: var(--text-strong);
      font-weight: 800;
      letter-spacing: -0.02em;
    }

    .brand-mark {
      width: 42px;
      height: 42px;
      border-radius: 14px;
      background:
        linear-gradient(135deg, rgba(65,215,255,0.95), rgba(109,125,255,0.95)),
        radial-gradient(circle at 30% 20%, rgba(255,255,255,.9), transparent 35%);
      display: grid;
      place-items: center;
      color: #06101f;
      box-shadow: var(--glow);
      font-weight: 900;
    }

    .brand-text {
      display: flex;
      flex-direction: column;
      line-height: 1.18;
      min-width: 0;
    }

    .brand-title {
      font-size: 17px;
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
      max-width: 290px;
    }

    .brand-sub {
      font-size: 12px;
      color: var(--muted);
      font-weight: 600;
      margin-top: 2px;
    }

    .nav-right {
      display: flex;
      align-items: center;
      gap: 18px;
    }

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

    .nav-link {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 40px;
      padding: 8px 16px;
      border-radius: 999px;
      color: #d9e6f8;
      font-weight: 700;
      font-size: 15px;
      transition: color .2s ease, background .2s ease, box-shadow .2s ease;
    }

    .nav-link:hover,
    .nav-link:focus-visible {
      color: #ffffff;
      background: rgba(65, 215, 255, 0.10);
      outline: none;
    }

    .nav-link.active {
      color: #06101f;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      box-shadow: 0 0 20px rgba(65,215,255,.28);
    }

    .nav-search {
      width: 230px;
      height: 42px;
      display: flex;
      align-items: center;
      gap: 8px;
      padding: 0 12px;
      border: 1px solid var(--line);
      border-radius: 999px;
      background: rgba(255,255,255,0.06);
      transition: border-color .2s ease, box-shadow .2s ease, background .2s ease;
    }

    .nav-search:focus-within {
      border-color: rgba(65,215,255,.75);
      box-shadow: 0 0 0 4px rgba(65,215,255,.12);
      background: rgba(255,255,255,0.09);
    }

    .nav-search svg {
      flex: 0 0 auto;
      color: var(--muted);
    }

    .nav-search input {
      width: 100%;
      border: 0;
      outline: 0;
      background: transparent;
      color: var(--text);
      font-size: 14px;
      min-width: 0;
    }

    .nav-search input::placeholder {
      color: #7890ad;
    }

    .menu-toggle {
      display: none;
      width: 44px;
      height: 44px;
      border: 1px solid var(--line);
      color: var(--text);
      background: rgba(255,255,255,0.06);
      border-radius: 14px;
      align-items: center;
      justify-content: center;
      transition: background .2s ease, border-color .2s ease;
    }

    .menu-toggle:hover,
    .menu-toggle:focus-visible {
      background: rgba(65,215,255,.12);
      border-color: rgba(65,215,255,.42);
      outline: none;
    }

    main {
      position: relative;
    }

    section {
      padding: 78px 0;
    }

    .section-head {
      display: flex;
      align-items: flex-end;
      justify-content: space-between;
      gap: 24px;
      margin-bottom: 28px;
    }

    .section-kicker {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      margin-bottom: 10px;
      color: var(--accent);
      font-size: 14px;
      font-weight: 800;
      letter-spacing: .08em;
    }

    .section-kicker::before {
      content: "";
      width: 22px;
      height: 2px;
      border-radius: 999px;
      background: var(--accent);
      box-shadow: 0 0 14px rgba(124,255,196,.65);
    }

    .section-title {
      margin: 0;
      color: var(--text-strong);
      font-size: clamp(28px, 3vw, 42px);
      line-height: 1.22;
      letter-spacing: -0.04em;
    }

    .section-desc {
      margin: 10px 0 0;
      color: var(--muted);
      max-width: 680px;
      font-size: 16px;
    }

    .section-actions {
      display: flex;
      gap: 12px;
      flex-wrap: wrap;
      flex: 0 0 auto;
    }

    .btn {
      position: relative;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 9px;
      min-height: 46px;
      padding: 12px 18px;
      border: 1px solid transparent;
      border-radius: 999px;
      font-weight: 800;
      color: var(--text-strong);
      background: rgba(255,255,255,0.08);
      transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease, background .2s ease, color .2s ease;
      user-select: none;
    }

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

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

    .btn:focus-visible {
      outline: 3px solid rgba(65,215,255,.34);
      outline-offset: 3px;
    }

    .btn-primary {
      color: #05111d;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      box-shadow: 0 0 26px rgba(65,215,255,.38), 0 14px 30px rgba(65,215,255,.16);
    }

    .btn-primary:hover {
      box-shadow: 0 0 36px rgba(65,215,255,.58), 0 18px 42px rgba(65,215,255,.20);
    }

    .btn-secondary {
      border-color: rgba(255,255,255,.16);
      background: rgba(255,255,255,.08);
    }

    .btn-secondary:hover {
      border-color: rgba(65,215,255,.45);
      background: rgba(65,215,255,.12);
    }

    .btn-ghost {
      color: #d8e8ff;
      border-color: var(--line);
      background: rgba(8,20,38,.52);
    }

    .btn-ghost:hover {
      border-color: var(--line-strong);
      background: rgba(255,255,255,.09);
    }

    .badge {
      display: inline-flex;
      align-items: center;
      gap: 7px;
      min-height: 28px;
      padding: 5px 10px;
      border-radius: 999px;
      border: 1px solid rgba(65,215,255,.25);
      color: #bfeeff;
      background: rgba(65,215,255,.10);
      font-size: 13px;
      font-weight: 800;
      white-space: nowrap;
    }

    .badge.green {
      color: #cbffe7;
      border-color: rgba(124,255,196,.28);
      background: rgba(124,255,196,.10);
    }

    .badge.yellow {
      color: #ffe8a4;
      border-color: rgba(255,209,102,.32);
      background: rgba(255,209,102,.10);
    }

    .glass-card {
      border: 1px solid var(--line);
      border-radius: var(--radius-lg);
      background:
        linear-gradient(180deg, rgba(255,255,255,0.09), rgba(255,255,255,0.035));
      box-shadow: var(--shadow-soft);
      backdrop-filter: blur(18px);
    }

    .hero {
      padding: 58px 0 82px;
    }

    .hero-shell {
      position: relative;
      overflow: hidden;
      border-radius: 34px;
      border: 1px solid rgba(134,184,255,.26);
      background:
        linear-gradient(135deg, rgba(13, 35, 67, 0.94), rgba(7, 18, 35, 0.94)),
        radial-gradient(circle at 76% 22%, rgba(65,215,255,.28), transparent 28%);
      box-shadow: var(--shadow);
    }

    .hero-shell::before,
    .hero-shell::after {
      content: "";
      position: absolute;
      border-radius: 999px;
      filter: blur(8px);
      pointer-events: none;
    }

    .hero-shell::before {
      width: 360px;
      height: 360px;
      right: -120px;
      top: -160px;
      background: radial-gradient(circle, rgba(65,215,255,.24), transparent 66%);
    }

    .hero-shell::after {
      width: 260px;
      height: 260px;
      left: -90px;
      bottom: -120px;
      background: radial-gradient(circle, rgba(124,255,196,.16), transparent 68%);
    }

    .hero-grid {
      position: relative;
      z-index: 1;
      display: grid;
      grid-template-columns: minmax(0, 1.05fr) minmax(320px, .95fr);
      gap: 32px;
      padding: clamp(24px, 4vw, 48px);
      align-items: stretch;
    }

    .hero-content {
      display: flex;
      flex-direction: column;
      justify-content: center;
      min-width: 0;
    }

    .hero-labels {
      display: flex;
      gap: 10px;
      flex-wrap: wrap;
      margin-bottom: 18px;
    }

    .hero h1 {
      margin: 0;
      max-width: 780px;
      color: var(--text-strong);
      font-size: clamp(34px, 5vw, 62px);
      line-height: 1.08;
      letter-spacing: -0.06em;
    }

    .hero-lead {
      margin: 20px 0 0;
      max-width: 690px;
      color: #c9d8ec;
      font-size: clamp(16px, 2vw, 19px);
    }

    .hero-points {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 12px;
      margin-top: 28px;
      max-width: 720px;
    }

    .point-card {
      padding: 14px;
      border-radius: 18px;
      border: 1px solid rgba(255,255,255,.10);
      background: rgba(255,255,255,.06);
    }

    .point-num {
      display: block;
      color: var(--text-strong);
      font-size: 23px;
      line-height: 1.1;
      font-weight: 900;
      letter-spacing: -0.03em;
    }

    .point-text {
      display: block;
      margin-top: 6px;
      color: var(--muted);
      font-size: 13px;
      line-height: 1.45;
    }

    .hero-asset {
      display: grid;
      grid-template-columns: minmax(180px, 0.85fr) minmax(220px, 1fr);
      gap: 16px;
      min-width: 0;
    }

    .whitepaper-cover {
      position: relative;
      overflow: hidden;
      min-height: 390px;
      border-radius: 26px;
      border: 1px solid rgba(255,255,255,.14);
      background:
        linear-gradient(180deg, rgba(65,215,255,.22), rgba(109,125,255,.12)),
        linear-gradient(145deg, #12284c, #071429);
      box-shadow: 0 28px 60px rgba(0,0,0,.34);
      padding: 22px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .whitepaper-cover::before {
      content: "";
      position: absolute;
      inset: 18px;
      border-radius: 20px;
      border: 1px solid rgba(255,255,255,.10);
      pointer-events: none;
    }

    .cover-top {
      position: relative;
      z-index: 1;
    }

    .cover-mini {
      color: var(--accent);
      font-size: 13px;
      font-weight: 900;
      letter-spacing: .12em;
    }

    .cover-title {
      margin: 18px 0 0;
      color: #fff;
      font-size: 30px;
      line-height: 1.15;
      font-weight: 900;
      letter-spacing: -0.05em;
    }

    .cover-lines {
      position: relative;
      z-index: 1;
      display: grid;
      gap: 9px;
    }

    .cover-lines i {
      display: block;
      height: 8px;
      border-radius: 999px;
      background: rgba(255,255,255,.16);
    }

    .cover-lines i:nth-child(1) { width: 88%; }
    .cover-lines i:nth-child(2) { width: 64%; }
    .cover-lines i:nth-child(3) { width: 74%; }

    .hero-form-panel {
      padding: 18px;
      border-radius: 26px;
      border: 1px solid rgba(255,255,255,.13);
      background: rgba(4, 14, 28, 0.55);
      backdrop-filter: blur(18px);
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .toc-box {
      padding: 16px;
      border-radius: 20px;
      background: rgba(255,255,255,.06);
      border: 1px solid rgba(255,255,255,.10);
    }

    .toc-title {
      margin: 0 0 10px;
      color: #fff;
      font-size: 16px;
      font-weight: 900;
    }

    .toc-list {
      display: grid;
      gap: 8px;
      margin: 0;
      padding: 0;
      list-style: none;
    }

    .toc-list li {
      display: flex;
      gap: 10px;
      align-items: flex-start;
      color: #cfe0f4;
      font-size: 14px;
      line-height: 1.45;
    }

    .toc-list b {
      flex: 0 0 auto;
      color: var(--primary);
    }

    .lead-form {
      display: grid;
      gap: 12px;
    }

    .form-row {
      display: grid;
      gap: 8px;
    }

    .form-row label {
      color: #dbe8f8;
      font-size: 13px;
      font-weight: 800;
    }

    .form-row input,
    .form-row select {
      width: 100%;
      height: 46px;
      border: 1px solid rgba(255,255,255,.14);
      border-radius: 14px;
      color: #fff;
      background: rgba(255,255,255,.07);
      padding: 0 13px;
      outline: none;
      transition: border-color .2s ease, box-shadow .2s ease, background .2s ease;
    }

    .form-row select option {
      color: #07111f;
    }

    .form-row input::placeholder {
      color: #8094b0;
    }

    .form-row input:focus,
    .form-row select:focus {
      border-color: rgba(65,215,255,.74);
      box-shadow: 0 0 0 4px rgba(65,215,255,.12);
      background: rgba(255,255,255,.10);
    }

    .form-note {
      margin: 0;
      color: var(--muted);
      font-size: 12px;
      line-height: 1.5;
    }

    .form-message {
      display: none;
      padding: 10px 12px;
      border-radius: 12px;
      color: #caffdf;
      background: rgba(88,240,167,.10);
      border: 1px solid rgba(88,240,167,.24);
      font-size: 13px;
    }

    .form-message.show {
      display: block;
    }

    .catalog-layout {
      display: grid;
      grid-template-columns: 1.05fr .95fr;
      gap: 18px;
    }

    .catalog-main {
      padding: 26px;
      min-height: 390px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      background:
        linear-gradient(145deg, rgba(65,215,255,.12), rgba(109,125,255,.08)),
        rgba(255,255,255,.05);
    }

    .catalog-main h3,
    .card h3,
    .guide-card h3,
    .price-card h3 {
      margin: 0;
      color: #fff;
      font-size: 22px;
      line-height: 1.25;
    }

    .catalog-main p,
    .card p,
    .guide-card p,
    .price-card p {
      margin: 10px 0 0;
      color: var(--muted);
      font-size: 15px;
    }

    .catalog-chips {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 20px;
    }

    .chapter-stack {
      display: grid;
      gap: 12px;
    }

    .chapter-item {
      position: relative;
      overflow: hidden;
      display: grid;
      grid-template-columns: 54px 1fr auto;
      gap: 14px;
      align-items: center;
      padding: 17px;
      border-radius: 20px;
      border: 1px solid var(--line);
      background: rgba(255,255,255,.055);
      transition: transform .2s ease, border-color .2s ease, background .2s ease;
    }

    .chapter-item:hover {
      transform: translateY(-3px);
      border-color: rgba(65,215,255,.38);
      background: rgba(65,215,255,.08);
    }

    .chapter-no {
      width: 54px;
      height: 54px;
      display: grid;
      place-items: center;
      border-radius: 18px;
      color: #07111f;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      font-weight: 900;
      box-shadow: 0 0 20px rgba(65,215,255,.28);
    }

    .chapter-item strong {
      display: block;
      color: #fff;
      font-size: 16px;
      line-height: 1.3;
    }

    .chapter-item span {
      display: block;
      margin-top: 5px;
      color: var(--muted);
      font-size: 13px;
      line-height: 1.45;
    }

    .chapter-arrow {
      color: var(--primary);
      font-weight: 900;
    }

    .recommend-grid {
      display: grid;
      grid-template-columns: 1.05fr .95fr;
      gap: 18px;
      align-items: stretch;
    }

    .feature-large {
      position: relative;
      overflow: hidden;
      min-height: 440px;
      padding: 28px;
      border-radius: var(--radius-xl);
      border: 1px solid var(--line);
      background:
        radial-gradient(circle at 78% 20%, rgba(65,215,255,.24), transparent 36%),
        linear-gradient(145deg, rgba(255,255,255,.09), rgba(255,255,255,.035));
      box-shadow: var(--shadow-soft);
    }

    .feature-large::after {
      content: "";
      position: absolute;
      right: 28px;
      bottom: 28px;
      width: 180px;
      height: 180px;
      border-radius: 48px;
      background:
        linear-gradient(135deg, rgba(65,215,255,.32), rgba(124,255,196,.12));
      border: 1px solid rgba(255,255,255,.12);
      transform: rotate(9deg);
      box-shadow: 0 0 60px rgba(65,215,255,.18);
    }

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

    .feature-large h3 {
      margin: 18px 0 0;
      color: #fff;
      font-size: clamp(26px, 3vw, 38px);
      line-height: 1.16;
      letter-spacing: -0.04em;
      max-width: 520px;
    }

    .feature-large p {
      max-width: 560px;
      margin: 14px 0 0;
      color: #c4d4e9;
    }

    .mini-card-grid {
      display: grid;
      gap: 18px;
      grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .card {
      padding: 22px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--line);
      background: rgba(255,255,255,.055);
      transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease, background .2s ease;
    }

    .card:hover {
      transform: translateY(-4px);
      border-color: rgba(65,215,255,.35);
      background: rgba(255,255,255,.075);
      box-shadow: 0 18px 42px rgba(0,0,0,.22);
    }

    .card-icon {
      width: 48px;
      height: 48px;
      display: grid;
      place-items: center;
      border-radius: 16px;
      margin-bottom: 16px;
      color: #06101f;
      background: linear-gradient(135deg, var(--primary), var(--primary-2));
      box-shadow: 0 0 18px rgba(65,215,255,.28);
      font-weight: 900;
    }

    .rank-section {
      padding-top: 40px;
    }

    .rank-layout {
      display: grid;
      grid-template-columns: .95fr 1.05fr;
      gap: 18px;
    }

    .trend-panel {
      padding: 24px;
      background:
        linear-gradient(145deg, rgba(124,255,196,.10), rgba(65,215,255,.05)),
        rgba(255,255,255,.05);
    }

    .trend-number {
      margin-top: 20px;
      color: #fff;
      font-size: clamp(42px, 5vw, 68px);
      line-height: 1;
      font-weight: 950;
      letter-spacing: -0.08em;
    }

    .trend-number small {
      color: var(--accent);
      font-size: 18px;
      letter-spacing: 0;
    }

    .trend-bars {
      display: grid;
      gap: 14px;
      margin-top: 26px;
    }

    .bar-row {
      display: grid;
      gap: 8px;
    }

    .bar-info {
      display: flex;
      justify-content: space-between;
      gap: 12px;
      color: #d8e8f8;
      font-size: 13px;
      font-weight: 800;
    }

    .bar-track {
      height: 9px;
      overflow: hidden;
      border-radius: 999px;
      background: rgba(255,255,255,.08);
    }

    .bar-fill {
      height: 100%;
      border-radius: inherit;
      background: linear-gradient(90deg, var(--primary), var(--accent));
      box-shadow: 0 0 18px rgba(65,215,255,.36);
    }

    .rank-list {
      padding: 8px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--line);
      background: rgba(255,255,255,.05);
    }

    .rank-row {
      display: grid;
      grid-template-columns: 42px 1fr 82px 92px;
      gap: 14px;
      align-items: center;
      padding: 15px 14px;
      border-radius: 16px;
      color: #d7e5f6;
      transition: background .2s ease, transform .2s ease;
    }

    .rank-row + .rank-row {
      border-top: 1px solid rgba(255,255,255,.06);
    }

    .rank-row:hover {
      background: rgba(65,215,255,.08);
      transform: translateX(3px);
    }

    .rank-index {
      width: 34px;
      height: 34px;
      display: grid;
      place-items: center;
      border-radius: 12px;
      color: #06101f;
      background: linear-gradient(135deg, var(--warning), var(--accent));
      font-weight: 900;
    }

    .rank-title {
      min-width: 0;
    }

    .rank-title strong {
      display: block;
      color: #fff;
      font-size: 15px;
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }

    .rank-title span {
      display: block;
      color: var(--muted);
      font-size: 12px;
      margin-top: 3px;
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }

    .rank-meta {
      color: #cce0f7;
      font-size: 13px;
      font-weight: 800;
      text-align: right;
    }

    .rank-up {
      color: var(--success);
      font-weight: 900;
      text-align: right;
    }

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

    .guide-card {
      padding: 24px;
      background:
        linear-gradient(180deg, rgba(109,125,255,.10), rgba(255,255,255,.04));
    }

    .steps {
      display: grid;
      grid-template-columns: repeat(2, minmax(0,1fr));
      gap: 14px;
    }

    .step-card {
      position: relative;
      padding: 20px;
      border-radius: 22px;
      border: 1px solid var(--line);
      background: rgba(255,255,255,.055);
      overflow: hidden;
    }

    .step-card::before {
      content: attr(data-step);
      position: absolute;
      right: 16px;
      top: 8px;
      color: rgba(255,255,255,.06);
      font-size: 56px;
      line-height: 1;
      font-weight: 950;
      letter-spacing: -0.08em;
    }

    .step-card strong {
      position: relative;
      display: block;
      color: #fff;
      font-size: 17px;
    }

    .step-card p {
      position: relative;
      margin: 9px 0 0;
      color: var(--muted);
      font-size: 14px;
      line-height: 1.6;
    }

    .news-layout {
      display: grid;
      grid-template-columns: minmax(0, 1.15fr) minmax(280px, .85fr);
      gap: 18px;
    }

    .news-list {
      padding: 10px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--line);
      background: rgba(255,255,255,.05);
    }

    .news-item {
      display: grid;
      grid-template-columns: 116px 1fr auto;
      gap: 16px;
      align-items: center;
      padding: 16px;
      border-radius: 18px;
      transition: background .2s ease, transform .2s ease;
    }

    .news-item:hover {
      background: rgba(65,215,255,.075);
      transform: translateY(-2px);
    }

    .news-date {
      color: var(--accent);
      font-weight: 900;
      font-size: 13px;
    }

    .news-link {
      min-width: 0;
    }

    .news-link strong {
      display: block;
      color: #fff;
      font-size: 16px;
      overflow: hidden;
      white-space: nowrap;
      text-overflow: ellipsis;
    }

    .news-link span {
      display: block;
      color: var(--muted);
      margin-top: 4px;
      font-size: 13px;
      line-height: 1.45;
      overflow: hidden;
      white-space: nowrap;
      text-overflow: ellipsis;
    }

    .news-arrow {
      color: var(--primary);
      font-weight: 900;
    }

    .side-reco {
      padding: 22px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--line);
      background:
        radial-gradient(circle at 80% 18%, rgba(65,215,255,.18), transparent 35%),
        rgba(255,255,255,.055);
    }

    .side-reco h3 {
      margin: 0;
      color: #fff;
      font-size: 22px;
    }

    .side-reco p {
      margin: 10px 0 18px;
      color: var(--muted);
    }

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

    .side-list li {
      display: flex;
      justify-content: space-between;
      gap: 12px;
      padding: 12px 0;
      border-top: 1px solid rgba(255,255,255,.08);
      color: #d6e4f5;
      font-size: 14px;
    }

    .side-list em {
      color: var(--warning);
      font-style: normal;
      font-weight: 900;
    }

    .share-shell {
      display: grid;
      grid-template-columns: .95fr 1.05fr;
      gap: 18px;
      align-items: stretch;
    }

    .invite-card {
      padding: 26px;
      background:
        linear-gradient(145deg, rgba(65,215,255,.10), rgba(124,255,196,.08)),
        rgba(255,255,255,.05);
    }

    .progress-panel {
      margin-top: 22px;
      padding: 18px;
      border-radius: 20px;
      background: rgba(3,12,24,.42);
      border: 1px solid rgba(255,255,255,.09);
    }

    .progress-top {
      display: flex;
      justify-content: space-between;
      gap: 12px;
      color: #dcecff;
      font-size: 14px;
      font-weight: 800;
    }

    .progress-bar {
      position: relative;
      height: 12px;
      margin-top: 12px;
      overflow: hidden;
      border-radius: 999px;
      background: rgba(255,255,255,.08);
    }

    .progress-bar span {
      display: block;
      width: 66%;
      height: 100%;
      border-radius: inherit;
      background: linear-gradient(90deg, var(--primary), var(--accent));
      box-shadow: 0 0 18px rgba(65,215,255,.45);
    }

    .share-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 18px;
    }

    .leaderboard {
      padding: 10px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--line);
      background: rgba(255,255,255,.05);
    }

    .leader-row {
      display: grid;
      grid-template-columns: 44px 1fr 82px;
      gap: 14px;
      align-items: center;
      padding: 15px;
      border-radius: 16px;
    }

    .leader-row + .leader-row {
      border-top: 1px solid rgba(255,255,255,.06);
    }

    .leader-row:hover {
      background: rgba(255,255,255,.055);
    }

    .avatar {
      width: 42px;
      height: 42px;
      border-radius: 15px;
      display: grid;
      place-items: center;
      color: #06101f;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      font-weight: 900;
    }

    .leader-name strong {
      display: block;
      color: #fff;
    }

    .leader-name span {
      display: block;
      color: var(--muted);
      font-size: 12px;
      margin-top: 2px;
    }

    .leader-score {
      color: var(--accent);
      font-weight: 900;
      text-align: right;
    }

    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, minmax(0,1fr));
      gap: 18px;
    }

    .price-card {
      position: relative;
      padding: 24px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--line);
      background: rgba(255,255,255,.052);
      transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
    }

    .price-card:hover {
      transform: translateY(-5px);
      border-color: rgba(65,215,255,.35);
      box-shadow: 0 18px 42px rgba(0,0,0,.24);
    }

    .price-card.featured {
      border-color: rgba(65,215,255,.48);
      background:
        radial-gradient(circle at 75% 12%, rgba(65,215,255,.19), transparent 34%),
        rgba(255,255,255,.065);
      box-shadow: 0 0 28px rgba(65,215,255,.13);
    }

    .price {
      margin: 18px 0;
      color: #fff;
      font-size: 34px;
      line-height: 1;
      font-weight: 950;
      letter-spacing: -0.05em;
    }

    .price small {
      color: var(--muted);
      font-size: 14px;
      font-weight: 700;
      letter-spacing: 0;
    }

    .check-list {
      display: grid;
      gap: 10px;
      margin: 18px 0 0;
      padding: 0;
      list-style: none;
    }

    .check-list li {
      display: flex;
      gap: 10px;
      color: #d3e2f4;
      font-size: 14px;
      line-height: 1.5;
    }

    .check-list li::before {
      content: "✓";
      flex: 0 0 auto;
      color: var(--accent);
      font-weight: 900;
    }

    .faq-grid {
      display: grid;
      grid-template-columns: .85fr 1.15fr;
      gap: 18px;
    }

    .faq-intro {
      padding: 26px;
      position: sticky;
      top: 120px;
      align-self: start;
    }

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

    .faq-item {
      border: 1px solid var(--line);
      border-radius: 20px;
      background: rgba(255,255,255,.052);
      overflow: hidden;
    }

    .faq-question {
      width: 100%;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding: 18px 20px;
      border: 0;
      color: #fff;
      background: transparent;
      text-align: left;
      font-weight: 900;
    }

    .faq-question span:last-child {
      color: var(--primary);
      font-size: 20px;
      transition: transform .2s ease;
    }

    .faq-item.open .faq-question span:last-child {
      transform: rotate(45deg);
    }

    .faq-answer {
      display: none;
      padding: 0 20px 18px;
      color: var(--muted);
      font-size: 15px;
      line-height: 1.8;
    }

    .faq-item.open .faq-answer {
      display: block;
    }

    .final-cta {
      padding: 0 0 86px;
    }

    .cta-panel {
      position: relative;
      overflow: hidden;
      border-radius: 32px;
      padding: clamp(26px, 5vw, 48px);
      border: 1px solid rgba(65,215,255,.30);
      background:
        radial-gradient(circle at 82% 18%, rgba(124,255,196,.20), transparent 30%),
        linear-gradient(135deg, rgba(17,45,82,.96), rgba(8,20,38,.96));
      box-shadow: var(--shadow);
    }

    .cta-panel::before {
      content: "";
      position: absolute;
      inset: auto -60px -120px auto;
      width: 280px;
      height: 280px;
      border-radius: 999px;
      background: rgba(65,215,255,.18);
      filter: blur(4px);
    }

    .cta-content {
      position: relative;
      display: grid;
      grid-template-columns: 1fr auto;
      gap: 24px;
      align-items: center;
    }

    .cta-content h2 {
      margin: 0;
      color: #fff;
      font-size: clamp(28px, 4vw, 46px);
      line-height: 1.16;
      letter-spacing: -0.05em;
    }

    .cta-content p {
      max-width: 760px;
      margin: 12px 0 0;
      color: #c6d8ec;
    }

    .site-footer {
      border-top: 1px solid var(--line);
      background: rgba(4, 12, 24, 0.88);
      padding: 42px 0 26px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.1fr .9fr;
      gap: 28px;
      align-items: start;
    }

    .footer-brand {
      display: flex;
      align-items: center;
      gap: 12px;
      color: #fff;
      font-weight: 900;
      font-size: 18px;
    }

    .footer-desc {
      max-width: 720px;
      margin: 14px 0 0;
      color: var(--muted);
      font-size: 14px;
    }

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

    .footer-links a {
      padding: 8px 12px;
      border-radius: 999px;
      color: #c7d9ee;
      border: 1px solid rgba(255,255,255,.08);
      transition: background .2s ease, color .2s ease, border-color .2s ease;
    }

    .footer-links a:hover {
      color: #fff;
      border-color: rgba(65,215,255,.32);
      background: rgba(65,215,255,.08);
    }

    .copyright {
      margin-top: 26px;
      padding-top: 20px;
      border-top: 1px solid rgba(255,255,255,.08);
      display: flex;
      justify-content: space-between;
      gap: 16px;
      flex-wrap: wrap;
      color: #7688a2;
      font-size: 13px;
    }

    @media (max-width: 1080px) {
      .nav-search {
        display: none;
      }

      .hero-grid,
      .hero-asset,
      .catalog-layout,
      .recommend-grid,
      .rank-layout,
      .guide-layout,
      .news-layout,
      .share-shell,
      .faq-grid {
        grid-template-columns: 1fr;
      }

      .hero-asset {
        grid-template-columns: minmax(0, .85fr) minmax(0, 1fr);
      }

      .whitepaper-cover {
        min-height: 320px;
      }

      .feature-large {
        min-height: 330px;
      }

      .faq-intro {
        position: static;
      }
    }

    @media (max-width: 768px) {
      :root {
        --nav-height: auto;
      }

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

      .top-strip .container {
        justify-content: center;
      }

      .top-strip span:last-child {
        display: none;
      }

      .navbar {
        min-height: 68px;
        align-items: center;
      }

      .brand-title {
        max-width: 210px;
        font-size: 15px;
      }

      .brand-sub {
        display: none;
      }

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

      .nav-right {
        position: absolute;
        left: 14px;
        right: 14px;
        top: calc(100% + 8px);
        display: none;
        padding: 12px;
        border: 1px solid var(--line);
        border-radius: 20px;
        background: rgba(7, 18, 35, 0.96);
        box-shadow: var(--shadow);
      }

      .site-header.nav-open .nav-right {
        display: block;
      }

      .nav-menu {
        width: 100%;
        display: grid;
      }

      .nav-link {
        justify-content: flex-start;
        width: 100%;
      }

      section {
        padding: 56px 0;
      }

      .section-head {
        display: block;
      }

      .section-actions {
        margin-top: 18px;
      }

      .hero {
        padding-top: 28px;
      }

      .hero-grid {
        padding: 22px;
        gap: 22px;
      }

      .hero-points,
      .steps,
      .pricing-grid,
      .mini-card-grid {
        grid-template-columns: 1fr;
      }

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

      .whitepaper-cover {
        min-height: 260px;
      }

      .chapter-item {
        grid-template-columns: 46px 1fr;
      }

      .chapter-arrow {
        display: none;
      }

      .rank-row {
        grid-template-columns: 38px 1fr 62px;
      }

      .rank-row .rank-meta:nth-of-type(2) {
        display: none;
      }

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

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

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

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

    @media (max-width: 520px) {
      body {
        line-height: 1.68;
      }

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

      .brand-title {
        max-width: 176px;
      }

      .hero h1 {
        font-size: 32px;
      }

      .hero-lead {
        font-size: 15px;
      }

      .btn {
        width: 100%;
      }

      .hero-labels,
      .catalog-chips,
      .share-actions {
        gap: 8px;
      }

      .point-card,
      .card,
      .guide-card,
      .price-card,
      .invite-card,
      .trend-panel {
        padding: 18px;
      }

      .section-title {
        font-size: 27px;
      }

      .feature-large {
        padding: 22px;
        min-height: 300px;
      }

      .feature-large::after {
        width: 120px;
        height: 120px;
        right: 18px;
        bottom: 20px;
      }

      .leader-row {
        grid-template-columns: 42px 1fr;
      }

      .leader-score {
        grid-column: 2;
        text-align: left;
      }

      .copyright {
        display: block;
      }

      .copyright span {
        display: block;
        margin-top: 8px;
      }
    }