/* roulang page: index */
:root {
      --bg: #06111F;
      --bg-2: #081A2E;
      --bg-3: #0B2038;
      --text: #EAF6FF;
      --muted: #A8C7DD;
      --soft: rgba(234, 246, 255, .72);
      --line: rgba(148, 203, 255, .18);
      --line-strong: rgba(56, 189, 248, .42);
      --blue: #38BDF8;
      --blue-2: #0EA5E9;
      --cyan: #22D3EE;
      --mint: #2DD4BF;
      --warn: #FBBF24;
      --card: rgba(8, 26, 46, .66);
      --card-2: rgba(11, 32, 56, .72);
      --radius-xl: 28px;
      --radius-lg: 22px;
      --radius-md: 16px;
      --shadow: 0 22px 70px rgba(2, 8, 23, .38);
      --glow: 0 0 34px rgba(56, 189, 248, .24);
    }

    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      min-height: 100vh;
      color: var(--text);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
      line-height: 1.75;
      background:
        radial-gradient(circle at 18% 12%, rgba(56,189,248,.18), transparent 32%),
        radial-gradient(circle at 82% 4%, rgba(45,212,191,.13), transparent 28%),
        linear-gradient(135deg, #06111F 0%, #081A2E 44%, #0B2038 100%);
      overflow-x: hidden;
    }

    body::before {
      content: "";
      position: fixed;
      inset: 0;
      pointer-events: none;
      background-image:
        linear-gradient(rgba(148,203,255,.045) 1px, transparent 1px),
        linear-gradient(90deg, rgba(148,203,255,.045) 1px, transparent 1px);
      background-size: 42px 42px;
      mask-image: linear-gradient(to bottom, rgba(0,0,0,.9), rgba(0,0,0,.25));
      z-index: -2;
    }

    body::after {
      content: "";
      position: fixed;
      inset: 0;
      pointer-events: none;
      opacity: .22;
      background-image: radial-gradient(rgba(234,246,255,.12) .8px, transparent .8px);
      background-size: 18px 18px;
      z-index: -1;
    }

    a { color: inherit; text-decoration: none; }
    img { max-width: 100%; display: block; }
    button, input, textarea { font: inherit; }
    button { cursor: pointer; }
    ::selection { background: rgba(34,211,238,.35); color: #fff; }

    .site-container {
      width: min(100% - 40px, 1280px);
      margin-inline: auto;
    }

    .glass {
      background: var(--card);
      border: 1px solid var(--line);
      box-shadow: var(--shadow);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
    }

    .section {
      padding: 92px 0;
      position: relative;
    }

    .section-tight { padding: 70px 0; }

    .section-kicker {
      display: inline-flex;
      align-items: center;
      gap: 9px;
      padding: 7px 12px;
      border: 1px solid rgba(34,211,238,.26);
      border-radius: 999px;
      color: var(--cyan);
      background: rgba(34,211,238,.08);
      font-size: 13px;
      line-height: 1.3;
    }

    .dot {
      width: 8px;
      height: 8px;
      border-radius: 999px;
      background: var(--mint);
      box-shadow: 0 0 16px rgba(45,212,191,.8);
      flex: 0 0 auto;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 9px;
      min-height: 48px;
      padding: 12px 20px;
      border-radius: 999px;
      font-weight: 700;
      line-height: 1.2;
      transition: transform .2s ease, filter .2s ease, border-color .2s ease, background .2s ease, box-shadow .2s ease;
      white-space: normal;
      text-align: center;
    }

    .btn-primary {
      color: #04111f;
      background: linear-gradient(135deg, var(--cyan), var(--blue));
      box-shadow: 0 0 0 1px rgba(234,246,255,.16) inset, 0 14px 38px rgba(56,189,248,.34);
    }

    .btn-primary:hover {
      transform: translateY(-1px);
      filter: brightness(1.08);
      box-shadow: 0 0 0 1px rgba(234,246,255,.2) inset, 0 18px 48px rgba(56,189,248,.44);
    }

    .btn-secondary {
      color: var(--text);
      background: rgba(8,26,46,.46);
      border: 1px solid rgba(148,203,255,.28);
    }

    .btn-secondary:hover {
      transform: translateY(-1px);
      background: rgba(56,189,248,.12);
      border-color: rgba(56,189,248,.48);
    }

    .btn:focus-visible,
    .nav-link:focus-visible,
    .mobile-menu-button:focus-visible,
    input:focus-visible,
    textarea:focus-visible,
    summary:focus-visible {
      outline: 3px solid rgba(34,211,238,.58);
      outline-offset: 3px;
    }

    .badge {
      display: inline-flex;
      align-items: center;
      gap: 7px;
      padding: 6px 10px;
      border-radius: 999px;
      color: var(--muted);
      border: 1px solid rgba(148,203,255,.18);
      background: rgba(8,26,46,.44);
      font-size: 13px;
      line-height: 1.25;
    }

    .badge-blue { color: #BDEBFF; border-color: rgba(56,189,248,.32); background: rgba(56,189,248,.10); }
    .badge-cyan { color: #B8FFF7; border-color: rgba(45,212,191,.32); background: rgba(45,212,191,.10); }
    .badge-warn { color: #FFE8A3; border-color: rgba(251,191,36,.32); background: rgba(251,191,36,.10); }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 50;
      border-bottom: 1px solid rgba(148,203,255,.14);
      background: rgba(6,17,31,.74);
      backdrop-filter: blur(18px);
      -webkit-backdrop-filter: blur(18px);
    }

    .nav-shell {
      min-height: 76px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 22px;
    }

    .brand {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      font-weight: 900;
      color: var(--text);
      min-width: 0;
    }

    .brand-mark {
      width: 38px;
      height: 38px;
      border-radius: 14px;
      display: grid;
      place-items: center;
      background:
        linear-gradient(135deg, rgba(34,211,238,.24), rgba(56,189,248,.10)),
        rgba(8,26,46,.72);
      border: 1px solid rgba(56,189,248,.35);
      box-shadow: 0 0 24px rgba(34,211,238,.18);
      flex: 0 0 auto;
    }

    .brand-name {
      overflow-wrap: anywhere;
      line-height: 1.2;
    }

    .desktop-nav {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
      flex: 1 1 auto;
    }

    .nav-link {
      display: inline-flex;
      align-items: center;
      min-height: 38px;
      padding: 8px 14px;
      border: 1px solid transparent;
      border-radius: 999px;
      color: var(--muted);
      font-size: 14px;
      transition: color .2s ease, background .2s ease, border-color .2s ease;
    }

    .nav-link:hover,
    .nav-link.active {
      color: var(--text);
      border-color: rgba(56,189,248,.28);
      background: rgba(56,189,248,.10);
    }

    .mobile-menu-button {
      display: none;
      width: 44px;
      height: 44px;
      border: 1px solid rgba(148,203,255,.22);
      border-radius: 14px;
      color: var(--text);
      background: rgba(8,26,46,.66);
    }

    .mobile-menu {
      display: none;
      padding: 0 0 18px;
    }

    .hero {
      min-height: calc(100vh - 76px);
      display: flex;
      align-items: center;
      padding: 36px 0 72px;
    }

    .hero-stage {
      position: relative;
      width: 100%;
      min-height: 650px;
      overflow: hidden;
      border-radius: 34px;
      border: 1px solid rgba(148,203,255,.22);
      background:
        linear-gradient(180deg, rgba(6,17,31,.10), rgba(6,17,31,.86)),
        linear-gradient(90deg, rgba(6,17,31,.64), rgba(6,17,31,.18) 52%, rgba(6,17,31,.72)),
        url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='1600' height='900' viewBox='0 0 1600 900'%3E%3Cdefs%3E%3ClinearGradient id='g' x1='0' x2='1' y1='0' y2='1'%3E%3Cstop stop-color='%230B2038'/%3E%3Cstop offset='.45' stop-color='%23081A2E'/%3E%3Cstop offset='1' stop-color='%2306111F'/%3E%3C/linearGradient%3E%3CradialGradient id='r' cx='.62' cy='.34' r='.55'%3E%3Cstop stop-color='%2338BDF8' stop-opacity='.48'/%3E%3Cstop offset='.62' stop-color='%2322D3EE' stop-opacity='.08'/%3E%3Cstop offset='1' stop-color='%2306111F' stop-opacity='0'/%3E%3C/radialGradient%3E%3C/defs%3E%3Crect width='1600' height='900' fill='url(/%23g)'/%3E%3Crect width='1600' height='900' fill='url(/%23r)'/%3E%3Cg opacity='.36' stroke='%2394CBFF' stroke-width='1'%3E%3Cpath d='M70 160h1460M70 300h1460M70 440h1460M70 580h1460M70 720h1460M180 80v760M360 80v760M540 80v760M720 80v760M900 80v760M1080 80v760M1260 80v760M1440 80v760'/%3E%3C/g%3E%3Cg opacity='.78'%3E%3Crect x='858' y='150' width='470' height='92' rx='24' fill='%23081A2E' fill-opacity='.82' stroke='%2338BDF8' stroke-opacity='.3'/%3E%3Crect x='912' y='292' width='360' height='62' rx='18' fill='%2322D3EE' fill-opacity='.13' stroke='%2322D3EE' stroke-opacity='.32'/%3E%3Crect x='790' y='405' width='565' height='126' rx='28' fill='%230B2038' fill-opacity='.76' stroke='%2394CBFF' stroke-opacity='.22'/%3E%3Crect x='938' y='590' width='430' height='82' rx='24' fill='%2338BDF8' fill-opacity='.11' stroke='%2338BDF8' stroke-opacity='.34'/%3E%3Ccircle cx='1350' cy='205' r='7' fill='%232DD4BF'/%3E%3Ccircle cx='824' cy='458' r='7' fill='%23FBBF24'/%3E%3C/g%3E%3C/svg%3E") center/cover no-repeat;
      box-shadow: var(--shadow), var(--glow);
    }

    .hero-series {
      position: absolute;
      top: 22px;
      left: 22px;
      right: 22px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      padding: 10px;
      border-radius: 22px;
      background: rgba(6,17,31,.58);
      border: 1px solid rgba(148,203,255,.18);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
    }

    .series-tabs {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      min-width: 0;
    }

    .series-tab {
      padding: 8px 12px;
      border-radius: 999px;
      color: var(--muted);
      background: rgba(8,26,46,.58);
      border: 1px solid rgba(148,203,255,.16);
      font-size: 13px;
    }

    .series-tab.active {
      color: var(--text);
      border-color: rgba(34,211,238,.4);
      background: rgba(34,211,238,.12);
    }

    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 760px;
      padding: 150px 44px 54px;
    }

    .hero h1 {
      margin: 18px 0 22px;
      font-size: clamp(38px, 6vw, 70px);
      line-height: 1.1;
      font-weight: 950;
      letter-spacing: 0;
      overflow-wrap: anywhere;
    }

    .hero-desc {
      max-width: 700px;
      color: rgba(234,246,255,.82);
      font-size: 18px;
      line-height: 1.9;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      margin-top: 30px;
    }

    .hero-points {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 12px;
      max-width: 800px;
      margin-top: 34px;
    }

    .hero-point {
      padding: 16px;
      border-radius: 18px;
      background: rgba(8,26,46,.58);
      border: 1px solid rgba(148,203,255,.16);
      backdrop-filter: blur(10px);
    }

    .hero-point strong {
      display: block;
      font-size: 22px;
      line-height: 1.2;
      color: var(--text);
    }

    .hero-point span {
      display: block;
      margin-top: 4px;
      color: var(--muted);
      font-size: 13px;
    }

    .hero-panel {
      position: absolute;
      right: 34px;
      bottom: 34px;
      width: min(430px, calc(100% - 68px));
      padding: 18px;
      border-radius: 24px;
      background: rgba(8,26,46,.70);
      border: 1px solid rgba(148,203,255,.20);
      backdrop-filter: blur(16px);
    }

    .status-line {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 14px;
      padding: 12px 0;
      border-bottom: 1px solid rgba(148,203,255,.12);
    }

    .status-line:last-child { border-bottom: 0; }

    .progress {
      height: 8px;
      border-radius: 999px;
      overflow: hidden;
      background: rgba(148,203,255,.12);
    }

    .progress span {
      display: block;
      height: 100%;
      border-radius: inherit;
      background: linear-gradient(90deg, var(--mint), var(--blue));
      box-shadow: 0 0 18px rgba(56,189,248,.35);
    }

    .section-heading {
      display: flex;
      align-items: end;
      justify-content: space-between;
      gap: 24px;
      margin-bottom: 34px;
    }

    .section-heading h2 {
      margin: 12px 0 0;
      font-size: clamp(28px, 4vw, 44px);
      line-height: 1.18;
      font-weight: 900;
      letter-spacing: 0;
    }

    .section-heading p {
      max-width: 620px;
      margin: 0;
      color: var(--muted);
      font-size: 17px;
      line-height: 1.85;
    }

    .kpi-grid {
      display: grid;
      grid-template-columns: 1.1fr .9fr;
      gap: 18px;
    }

    .kpi-main,
    .kpi-side,
    .feature-panel,
    .scenario-card,
    .case-card,
    .price-card,
    .news-panel,
    .device-stage,
    .faq-card,
    .cta-band {
      border-radius: var(--radius-lg);
      background: var(--card);
      border: 1px solid var(--line);
      box-shadow: var(--shadow);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
    }

    .kpi-main { padding: 28px; }
    .kpi-side { padding: 22px; }

    .metric-grid {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 14px;
      margin-top: 24px;
    }

    .metric {
      padding: 18px;
      border-radius: 18px;
      background: rgba(6,17,31,.46);
      border: 1px solid rgba(148,203,255,.14);
    }

    .metric strong {
      display: block;
      color: var(--cyan);
      font-size: 28px;
      line-height: 1.1;
    }

    .metric span { color: var(--muted); font-size: 14px; }

    .news-layout {
      display: grid;
      grid-template-columns: minmax(0, 1.25fr) minmax(300px, .75fr);
      gap: 18px;
    }

    .news-panel { padding: 22px; }

    .news-list {
      display: grid;
      gap: 12px;
      margin: 0;
      padding: 0;
      list-style: none;
    }

    .news-item a {
      display: grid;
      grid-template-columns: 1fr auto;
      gap: 16px;
      padding: 16px;
      border-radius: 16px;
      border: 1px solid rgba(148,203,255,.14);
      background: rgba(6,17,31,.34);
      transition: transform .2s ease, border-color .2s ease, background .2s ease;
    }

    .news-item a:hover {
      transform: translateY(-1px);
      border-color: rgba(56,189,248,.38);
      background: rgba(56,189,248,.08);
    }

    .news-item strong { color: var(--text); overflow-wrap: anywhere; }
    .news-item span { color: var(--muted); font-size: 14px; }

    .feature-wrap {
      display: grid;
      grid-template-columns: 280px 1fr;
      gap: 18px;
      align-items: start;
    }

    .feature-nav {
      padding: 14px;
      border-radius: var(--radius-lg);
      background: rgba(8,26,46,.56);
      border: 1px solid var(--line);
      position: sticky;
      top: 96px;
    }

    .feature-nav a {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      padding: 13px 14px;
      border-radius: 14px;
      color: var(--muted);
      border: 1px solid transparent;
      transition: background .2s ease, color .2s ease, border-color .2s ease;
    }

    .feature-nav a:hover,
    .feature-nav a.active {
      color: var(--text);
      background: rgba(56,189,248,.10);
      border-color: rgba(56,189,248,.26);
    }

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

    .feature-panel {
      padding: 22px;
      min-height: 210px;
      transition: transform .2s ease, border-color .2s ease, background .2s ease, box-shadow .2s ease;
    }

    .feature-panel:hover {
      transform: translateY(-3px);
      border-color: rgba(56,189,248,.42);
      background: rgba(11,32,56,.78);
      box-shadow: var(--shadow), var(--glow);
    }

    .feature-panel h3,
    .scenario-card h3,
    .case-card h3,
    .price-card h3 {
      margin: 14px 0 8px;
      font-size: 20px;
      line-height: 1.35;
      font-weight: 850;
    }

    .feature-panel p,
    .scenario-card p,
    .case-card p,
    .price-card p {
      margin: 0;
      color: var(--muted);
      line-height: 1.8;
    }

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

    .scenario-card {
      display: grid;
      grid-template-columns: 72px 1fr auto;
      gap: 18px;
      align-items: center;
      padding: 22px;
      transition: border-color .2s ease, transform .2s ease;
    }

    .scenario-card:hover {
      transform: translateX(2px);
      border-color: rgba(45,212,191,.36);
    }

    .step-num {
      width: 54px;
      height: 54px;
      border-radius: 18px;
      display: grid;
      place-items: center;
      color: #04111f;
      font-weight: 900;
      background: linear-gradient(135deg, var(--mint), var(--blue));
      box-shadow: 0 0 24px rgba(45,212,191,.26);
    }

    .case-layout {
      display: grid;
      grid-template-columns: 1fr 340px;
      gap: 18px;
      align-items: stretch;
    }

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

    .case-card { padding: 22px; }

    .summary-panel {
      border-radius: var(--radius-lg);
      padding: 24px;
      background: linear-gradient(180deg, rgba(56,189,248,.12), rgba(8,26,46,.68));
      border: 1px solid rgba(56,189,248,.26);
      box-shadow: var(--shadow), var(--glow);
    }

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

    .price-card {
      padding: 24px;
      display: flex;
      flex-direction: column;
      min-height: 430px;
      transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
    }

    .price-card:hover {
      transform: translateY(-3px);
      border-color: rgba(56,189,248,.36);
    }

    .price-card.recommend {
      border-color: rgba(34,211,238,.46);
      box-shadow: var(--shadow), 0 0 44px rgba(34,211,238,.18);
    }

    .price-value {
      margin: 18px 0;
      font-size: 34px;
      line-height: 1.1;
      font-weight: 950;
      color: var(--text);
    }

    .check-list {
      display: grid;
      gap: 10px;
      margin: 18px 0 24px;
      padding: 0;
      list-style: none;
      color: var(--muted);
    }

    .check-list li {
      display: flex;
      gap: 10px;
      align-items: flex-start;
    }

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

    .device-stage {
      padding: 24px;
      overflow: hidden;
    }

    .screen-grid {
      display: grid;
      grid-template-columns: 1.1fr .9fr;
      gap: 18px;
      align-items: stretch;
    }

    .screen {
      min-height: 360px;
      border-radius: 26px;
      padding: 20px;
      border: 1px solid rgba(148,203,255,.18);
      background:
        linear-gradient(180deg, rgba(6,17,31,.24), rgba(6,17,31,.72)),
        rgba(11,32,56,.74);
      box-shadow: inset 0 1px 0 rgba(234,246,255,.08);
    }

    .screen-row {
      display: grid;
      grid-template-columns: 110px 1fr auto;
      gap: 12px;
      align-items: center;
      padding: 13px;
      border-radius: 14px;
      background: rgba(6,17,31,.42);
      border: 1px solid rgba(148,203,255,.12);
      margin-top: 12px;
    }

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

    .faq-card { padding: 20px; }

    details {
      border-radius: 18px;
      border: 1px solid rgba(148,203,255,.16);
      background: rgba(6,17,31,.36);
      overflow: hidden;
    }

    details + details { margin-top: 12px; }

    summary {
      list-style: none;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding: 18px;
      color: var(--text);
      font-weight: 800;
      cursor: pointer;
    }

    summary::-webkit-details-marker { display: none; }
    summary::after {
      content: "+";
      color: var(--cyan);
      font-size: 22px;
      line-height: 1;
    }

    details[open] summary::after { content: "−"; }

    details p {
      margin: 0;
      padding: 0 18px 18px;
      color: var(--muted);
      line-height: 1.85;
    }

    .cta-band {
      padding: 34px;
      display: grid;
      grid-template-columns: 1fr auto;
      gap: 24px;
      align-items: center;
      background:
        radial-gradient(circle at 80% 30%, rgba(34,211,238,.18), transparent 34%),
        rgba(8,26,46,.70);
    }

    .site-footer {
      position: relative;
      padding: 54px 0 30px;
      background: rgba(3,10,20,.72);
      border-top: 1px solid rgba(56,189,248,.18);
    }

    .site-footer::before {
      content: "";
      position: absolute;
      top: -1px;
      left: 0;
      right: 0;
      height: 1px;
      background: linear-gradient(90deg, transparent, rgba(56,189,248,.72), transparent);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.2fr .8fr .8fr;
      gap: 28px;
    }

    .footer-links {
      display: grid;
      gap: 10px;
    }

    .footer-links a {
      color: var(--muted);
      transition: color .2s ease;
    }

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

    .copyright {
      margin-top: 34px;
      padding-top: 22px;
      border-top: 1px solid rgba(148,203,255,.12);
      color: rgba(168,199,221,.76);
      font-size: 14px;
    }

    @media (max-width: 1024px) {
      .desktop-nav,
      .nav-cta { display: none; }
      .mobile-menu-button { display: grid; place-items: center; }
      .mobile-menu.open { display: block; }
      .mobile-menu .nav-link,
      .mobile-menu .btn { width: 100%; justify-content: center; margin-top: 10px; }
      .hero { min-height: auto; padding-top: 22px; }
      .hero-stage { min-height: auto; }
      .hero-content { padding: 132px 28px 330px; }
      .hero-panel { left: 28px; right: 28px; width: auto; }
      .kpi-grid,
      .news-layout,
      .feature-wrap,
      .case-layout,
      .screen-grid,
      .faq-grid,
      .cta-band {
        grid-template-columns: 1fr;
      }
      .feature-nav { position: static; }
      .price-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }

    @media (max-width: 768px) {
      .site-container { width: min(100% - 32px, 1280px); }
      .section { padding: 64px 0; }
      .section-tight { padding: 54px 0; }
      .section-heading { display: block; }
      .section-heading p { margin-top: 14px; }
      .hero-series {
        position: relative;
        top: auto;
        left: auto;
        right: auto;
        margin: 14px;
        align-items: stretch;
        flex-direction: column;
      }
      .hero-content { padding: 28px 20px 380px; }
      .hero-points,
      .metric-grid,
      .feature-grid,
      .case-list {
        grid-template-columns: 1fr;
      }
      .scenario-card {
        grid-template-columns: 1fr;
        align-items: start;
      }
      .news-item a,
      .screen-row {
        grid-template-columns: 1fr;
      }
      .footer-grid { grid-template-columns: 1fr; }
    }

    @media (max-width: 520px) {
      .brand-mark { width: 34px; height: 34px; border-radius: 12px; }
      .brand-name { font-size: 14px; }
      .hero h1 { font-size: 36px; }
      .hero-desc { font-size: 16px; }
      .hero-actions .btn { width: 100%; }
      .hero-content { padding-bottom: 420px; }
      .hero-panel { left: 16px; right: 16px; bottom: 16px; width: auto; }
      .price-card { min-height: auto; }
      .cta-band { padding: 24px; }
    }

/* roulang page: category1 */
:root {
      --bg: #06111f;
      --bg-2: #081a2e;
      --panel: rgba(8, 26, 46, .66);
      --panel-strong: rgba(11, 32, 56, .82);
      --text: #eaf6ff;
      --muted: #a8c7dd;
      --soft: #6f93ad;
      --line: rgba(148, 203, 255, .18);
      --line-strong: rgba(56, 189, 248, .45);
      --blue: #38bdf8;
      --blue-2: #0ea5e9;
      --cyan: #22d3ee;
      --mint: #2dd4bf;
      --amber: #fbbf24;
      --radius-lg: 26px;
      --radius-md: 18px;
      --radius-sm: 14px;
      --shadow: 0 20px 70px rgba(14, 165, 233, .16);
      --glow: 0 0 0 1px rgba(56, 189, 248, .22), 0 16px 46px rgba(34, 211, 238, .18);
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      min-height: 100vh;
      color: var(--text);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
      line-height: 1.75;
      background:
        radial-gradient(circle at 18% 12%, rgba(56, 189, 248, .18), transparent 28%),
        radial-gradient(circle at 82% 8%, rgba(45, 212, 191, .13), transparent 24%),
        linear-gradient(135deg, #06111f 0%, #081a2e 42%, #0b2038 100%);
      overflow-x: hidden;
    }

    body::before {
      content: "";
      position: fixed;
      inset: 0;
      pointer-events: none;
      opacity: .42;
      background-image:
        linear-gradient(rgba(148, 203, 255, .06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(148, 203, 255, .06) 1px, transparent 1px);
      background-size: 42px 42px;
      mask-image: linear-gradient(to bottom, rgba(0, 0, 0, .9), transparent 88%);
      z-index: -2;
    }

    body::after {
      content: "";
      position: fixed;
      inset: 0;
      pointer-events: none;
      opacity: .08;
      background-image: repeating-linear-gradient(0deg, rgba(255,255,255,.18) 0, rgba(255,255,255,.18) 1px, transparent 1px, transparent 5px);
      z-index: -1;
    }

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

    button,
    input,
    textarea {
      font: inherit;
    }

    button {
      cursor: pointer;
    }

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

    :focus-visible {
      outline: 3px solid rgba(34, 211, 238, .75);
      outline-offset: 3px;
    }

    .site-container {
      width: min(100% - 40px, 1240px);
      margin-inline: auto;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 50;
      padding: 14px 0;
      background: rgba(6, 17, 31, .72);
      border-bottom: 1px solid rgba(148, 203, 255, .12);
      backdrop-filter: blur(18px);
    }

    .nav-shell {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
      padding: 10px;
      border: 1px solid rgba(148, 203, 255, .16);
      border-radius: 999px;
      background: rgba(8, 26, 46, .56);
      box-shadow: 0 16px 46px rgba(0, 0, 0, .22);
    }

    .brand {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      min-width: 0;
      font-weight: 900;
      color: var(--text);
    }

    .brand-mark {
      width: 36px;
      height: 36px;
      flex: 0 0 auto;
      border-radius: 13px;
      display: grid;
      place-items: center;
      background: linear-gradient(135deg, rgba(56, 189, 248, .22), rgba(45, 212, 191, .16));
      border: 1px solid rgba(56, 189, 248, .45);
      box-shadow: 0 0 28px rgba(56, 189, 248, .22);
    }

    .dot {
      width: 10px;
      height: 10px;
      border-radius: 999px;
      background: var(--mint);
      box-shadow: 0 0 18px rgba(45, 212, 191, .9);
    }

    .brand-name {
      display: inline-block;
      max-width: 260px;
      overflow-wrap: anywhere;
      line-height: 1.25;
      letter-spacing: 0;
    }

    .desktop-nav {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      flex: 1;
    }

    .nav-link {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 42px;
      padding: 0 16px;
      border-radius: 999px;
      color: var(--muted);
      border: 1px solid transparent;
      transition: transform .2s ease, color .2s ease, background .2s ease, border-color .2s ease;
      white-space: nowrap;
    }

    .nav-link:hover,
    .nav-link.active {
      color: var(--text);
      background: rgba(56, 189, 248, .12);
      border-color: rgba(56, 189, 248, .32);
    }

    .nav-link:active {
      transform: translateY(1px);
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      min-height: 46px;
      padding: 0 20px;
      border-radius: 999px;
      border: 1px solid transparent;
      font-weight: 800;
      line-height: 1.2;
      transition: transform .2s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease, color .2s ease;
      white-space: nowrap;
    }

    .btn-primary {
      color: #03111f;
      background: linear-gradient(135deg, var(--blue), var(--cyan) 52%, var(--mint));
      box-shadow: 0 0 24px rgba(56, 189, 248, .34), 0 16px 32px rgba(14, 165, 233, .18);
    }

    .btn-primary:hover {
      transform: translateY(-1px);
      box-shadow: 0 0 34px rgba(34, 211, 238, .42), 0 20px 42px rgba(14, 165, 233, .24);
      filter: brightness(1.06);
    }

    .btn-secondary {
      color: var(--text);
      background: rgba(8, 26, 46, .46);
      border-color: rgba(56, 189, 248, .34);
    }

    .btn-secondary:hover {
      transform: translateY(-1px);
      background: rgba(56, 189, 248, .12);
      border-color: rgba(34, 211, 238, .5);
    }

    .mobile-menu-button {
      display: none;
      width: 46px;
      height: 46px;
      border: 1px solid rgba(56, 189, 248, .3);
      border-radius: 999px;
      color: var(--text);
      background: rgba(8, 26, 46, .72);
    }

    .mobile-menu {
      display: none;
      margin-top: 12px;
      padding: 14px;
      border: 1px solid var(--line);
      border-radius: 22px;
      background: rgba(8, 26, 46, .88);
      backdrop-filter: blur(18px);
      box-shadow: var(--shadow);
    }

    .mobile-menu.open {
      display: grid;
      gap: 10px;
    }

    .section {
      padding: 88px 0;
    }

    .inner-hero {
      position: relative;
      padding: 70px 0 48px;
      overflow: hidden;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: minmax(0, 1.08fr) minmax(360px, .92fr);
      gap: 34px;
      align-items: stretch;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 7px 12px;
      border: 1px solid rgba(34, 211, 238, .26);
      border-radius: 999px;
      color: #b9ecff;
      background: rgba(34, 211, 238, .08);
      font-size: 13px;
      font-weight: 800;
    }

    .pulse {
      width: 8px;
      height: 8px;
      border-radius: 999px;
      background: var(--mint);
      box-shadow: 0 0 16px rgba(45, 212, 191, .85);
    }

    h1,
    h2,
    h3 {
      margin: 0;
      color: var(--text);
      letter-spacing: 0;
    }

    h1 {
      margin-top: 18px;
      font-size: clamp(34px, 6vw, 64px);
      line-height: 1.1;
      font-weight: 950;
      max-width: 860px;
    }

    h2 {
      font-size: clamp(28px, 4vw, 42px);
      line-height: 1.18;
      font-weight: 950;
    }

    h3 {
      font-weight: 900;
      line-height: 1.35;
    }

    .lead {
      margin-top: 20px;
      max-width: 760px;
      color: var(--muted);
      font-size: 18px;
      line-height: 1.9;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      margin-top: 30px;
    }

    .status-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 28px;
    }

    .badge {
      display: inline-flex;
      align-items: center;
      gap: 7px;
      min-height: 30px;
      padding: 5px 10px;
      border-radius: 999px;
      font-size: 13px;
      font-weight: 800;
      color: #c9edff;
      background: rgba(56, 189, 248, .1);
      border: 1px solid rgba(56, 189, 248, .24);
      white-space: normal;
    }

    .badge.mint {
      color: #c8fff4;
      background: rgba(45, 212, 191, .1);
      border-color: rgba(45, 212, 191, .28);
    }

    .badge.amber {
      color: #fff0c2;
      background: rgba(251, 191, 36, .09);
      border-color: rgba(251, 191, 36, .28);
    }

    .glass-card {
      border: 1px solid var(--line);
      border-radius: var(--radius-lg);
      background: var(--panel);
      backdrop-filter: blur(14px);
      box-shadow: var(--shadow);
      transition: transform .22s ease, border-color .22s ease, background .22s ease, box-shadow .22s ease;
    }

    .glass-card:hover {
      border-color: rgba(56, 189, 248, .38);
      background: rgba(11, 32, 56, .76);
      box-shadow: var(--glow);
    }

    .overview-panel {
      padding: 22px;
      position: relative;
      overflow: hidden;
    }

    .overview-panel::before {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(56, 189, 248, .13), transparent 36%, rgba(45, 212, 191, .11));
      pointer-events: none;
    }

    .panel-content {
      position: relative;
      z-index: 1;
    }

    .metric-grid {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 12px;
      margin-top: 18px;
    }

    .metric {
      padding: 16px;
      border-radius: 18px;
      background: rgba(6, 17, 31, .48);
      border: 1px solid rgba(148, 203, 255, .14);
    }

    .metric strong {
      display: block;
      font-size: 28px;
      line-height: 1.1;
      color: #dbf7ff;
    }

    .metric span {
      display: block;
      margin-top: 6px;
      color: var(--muted);
      font-size: 13px;
    }

    .filter-row {
      display: flex;
      flex-wrap: wrap;
      gap: 9px;
      margin-top: 18px;
    }

    .filter-chip {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 8px 11px;
      border-radius: 999px;
      color: var(--muted);
      background: rgba(6, 17, 31, .46);
      border: 1px solid rgba(148, 203, 255, .16);
      font-size: 13px;
      font-weight: 800;
    }

    .filter-chip.active,
    .filter-chip:hover {
      color: var(--text);
      border-color: rgba(34, 211, 238, .42);
      background: rgba(34, 211, 238, .1);
    }

    .section-head {
      display: grid;
      grid-template-columns: minmax(0, .78fr) minmax(280px, .42fr);
      gap: 24px;
      align-items: end;
      margin-bottom: 30px;
    }

    .section-head p {
      margin: 0;
      color: var(--muted);
      font-size: 17px;
      line-height: 1.85;
    }

    .workspace {
      display: grid;
      grid-template-columns: 300px minmax(0, 1fr);
      gap: 24px;
      align-items: start;
    }

    .filter-panel {
      position: sticky;
      top: 118px;
      padding: 20px;
      border-radius: var(--radius-lg);
    }

    .filter-group + .filter-group {
      margin-top: 22px;
      padding-top: 20px;
      border-top: 1px solid rgba(148, 203, 255, .12);
    }

    .filter-title {
      margin-bottom: 12px;
      font-size: 15px;
      font-weight: 900;
      color: #dff7ff;
    }

    .option-list {
      display: grid;
      gap: 9px;
    }

    .option {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 10px;
      padding: 11px 12px;
      border-radius: 14px;
      color: var(--muted);
      border: 1px solid rgba(148, 203, 255, .13);
      background: rgba(6, 17, 31, .35);
      transition: background .2s ease, border-color .2s ease, color .2s ease;
    }

    .option:hover,
    .option.active {
      color: var(--text);
      background: rgba(56, 189, 248, .1);
      border-color: rgba(56, 189, 248, .35);
    }

    .content-list {
      display: grid;
      gap: 16px;
    }

    .info-item {
      display: grid;
      grid-template-columns: minmax(0, 1fr) auto;
      gap: 18px;
      padding: 20px;
      border-radius: 22px;
      border: 1px solid var(--line);
      background: rgba(8, 26, 46, .58);
      backdrop-filter: blur(14px);
      transition: transform .22s ease, border-color .22s ease, background .22s ease, box-shadow .22s ease;
    }

    .info-item:hover {
      transform: translateY(-2px);
      border-color: rgba(56, 189, 248, .4);
      background: rgba(11, 32, 56, .76);
      box-shadow: var(--glow);
    }

    .item-title {
      font-size: 20px;
      margin-bottom: 8px;
    }

    .item-desc {
      margin: 0;
      color: var(--muted);
      line-height: 1.85;
    }

    .item-meta {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 14px;
    }

    .item-action {
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      align-items: flex-end;
      gap: 12px;
      min-width: 150px;
    }

    .state {
      display: inline-flex;
      align-items: center;
      gap: 7px;
      color: #c8fff4;
      font-size: 13px;
      font-weight: 900;
    }

    .state::before {
      content: "";
      width: 8px;
      height: 8px;
      border-radius: 999px;
      background: var(--mint);
      box-shadow: 0 0 14px rgba(45, 212, 191, .8);
    }

    .compare-wrap {
      overflow-x: auto;
      border-radius: var(--radius-lg);
      border: 1px solid var(--line);
      background: rgba(8, 26, 46, .55);
      box-shadow: var(--shadow);
    }

    .compare-table {
      width: 100%;
      min-width: 760px;
      border-collapse: collapse;
    }

    .compare-table th,
    .compare-table td {
      padding: 18px;
      text-align: left;
      border-bottom: 1px solid rgba(148, 203, 255, .12);
      vertical-align: top;
    }

    .compare-table th {
      color: #dbf7ff;
      background: rgba(56, 189, 248, .08);
      font-size: 14px;
    }

    .compare-table td {
      color: var(--muted);
    }

    .compare-table tr:last-child td {
      border-bottom: 0;
    }

    .timeline {
      display: grid;
      gap: 14px;
      counter-reset: step;
    }

    .step {
      display: grid;
      grid-template-columns: 52px minmax(0, 1fr);
      gap: 16px;
      padding: 18px;
      border-radius: 22px;
      border: 1px solid var(--line);
      background: rgba(8, 26, 46, .52);
    }

    .step::before {
      counter-increment: step;
      content: counter(step);
      width: 42px;
      height: 42px;
      display: grid;
      place-items: center;
      border-radius: 15px;
      color: #041523;
      font-weight: 950;
      background: linear-gradient(135deg, var(--blue), var(--mint));
      box-shadow: 0 0 22px rgba(56, 189, 248, .26);
    }

    .proof-grid {
      display: grid;
      grid-template-columns: minmax(0, .95fr) minmax(300px, .5fr);
      gap: 24px;
      align-items: stretch;
    }

    .proof-stack {
      display: grid;
      gap: 16px;
    }

    .proof-card {
      padding: 20px;
      border-radius: 22px;
      border: 1px solid var(--line);
      background: rgba(8, 26, 46, .58);
    }

    .proof-card p {
      color: var(--muted);
      margin: 10px 0 0;
    }

    .score-panel {
      padding: 24px;
      border-radius: var(--radius-lg);
    }

    .score-line {
      margin-top: 18px;
    }

    .score-top {
      display: flex;
      justify-content: space-between;
      gap: 12px;
      color: var(--muted);
      font-weight: 800;
      font-size: 14px;
    }

    .bar {
      height: 10px;
      border-radius: 999px;
      margin-top: 8px;
      background: rgba(148, 203, 255, .12);
      overflow: hidden;
    }

    .bar span {
      display: block;
      height: 100%;
      border-radius: inherit;
      background: linear-gradient(90deg, var(--blue), var(--mint));
      box-shadow: 0 0 18px rgba(34, 211, 238, .42);
    }

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

    .plan {
      padding: 22px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--line);
      background: rgba(8, 26, 46, .55);
      position: relative;
      overflow: hidden;
    }

    .plan.featured {
      border-color: rgba(34, 211, 238, .55);
      box-shadow: var(--glow);
    }

    .plan-name {
      font-size: 20px;
    }

    .price {
      margin: 14px 0;
      font-size: 34px;
      font-weight: 950;
      color: #dff7ff;
    }

    .plan ul {
      list-style: none;
      padding: 0;
      margin: 18px 0 22px;
      display: grid;
      gap: 10px;
      color: var(--muted);
    }

    .plan li {
      display: flex;
      gap: 9px;
    }

    .plan li::before {
      content: "✓";
      color: var(--mint);
      font-weight: 900;
    }

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

    details {
      border: 1px solid var(--line);
      border-radius: 20px;
      background: rgba(8, 26, 46, .56);
      overflow: hidden;
    }

    summary {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
      padding: 18px 20px;
      color: var(--text);
      font-weight: 900;
      cursor: pointer;
      list-style: none;
    }

    summary::-webkit-details-marker {
      display: none;
    }

    summary::after {
      content: "+";
      width: 28px;
      height: 28px;
      flex: 0 0 auto;
      display: grid;
      place-items: center;
      border-radius: 999px;
      color: #03111f;
      background: linear-gradient(135deg, var(--blue), var(--mint));
      font-weight: 950;
    }

    details[open] summary::after {
      content: "−";
    }

    details p {
      margin: 0;
      padding: 0 20px 20px;
      color: var(--muted);
      line-height: 1.85;
    }

    .cta-band {
      padding: 34px;
      border-radius: 30px;
      border: 1px solid rgba(56, 189, 248, .28);
      background:
        linear-gradient(135deg, rgba(56, 189, 248, .14), rgba(45, 212, 191, .08)),
        rgba(8, 26, 46, .7);
      box-shadow: var(--glow);
      display: grid;
      grid-template-columns: minmax(0, 1fr) auto;
      gap: 22px;
      align-items: center;
    }

    .cta-band p {
      color: var(--muted);
      margin: 10px 0 0;
    }

    .site-footer {
      margin-top: 40px;
      padding: 56px 0 32px;
      background: rgba(3, 10, 20, .82);
      border-top: 1px solid rgba(56, 189, 248, .22);
      box-shadow: inset 0 1px 0 rgba(34, 211, 238, .18);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: minmax(0, 1.25fr) .55fr .55fr;
      gap: 34px;
      align-items: start;
    }

    .text-muted {
      color: var(--muted);
    }

    .footer-links {
      display: grid;
      gap: 10px;
    }

    .footer-links a {
      color: var(--muted);
      transition: color .2s ease, transform .2s ease;
    }

    .footer-links a:hover {
      color: var(--cyan);
      transform: translateX(2px);
    }

    .copyright {
      margin-top: 34px;
      padding-top: 22px;
      border-top: 1px solid rgba(148, 203, 255, .12);
      color: var(--soft);
      font-size: 14px;
    }

    @media (max-width: 1024px) {
      .desktop-nav,
      .nav-cta {
        display: none;
      }

      .mobile-menu-button {
        display: inline-grid;
        place-items: center;
      }

      .nav-shell {
        border-radius: 24px;
      }

      .hero-grid,
      .workspace,
      .proof-grid,
      .section-head,
      .cta-band {
        grid-template-columns: 1fr;
      }

      .filter-panel {
        position: static;
      }

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

    @media (max-width: 640px) {
      .site-container {
        width: min(100% - 28px, 1240px);
      }

      .site-header {
        padding: 10px 0;
      }

      .brand-name {
        max-width: 190px;
        font-size: 14px;
      }

      .inner-hero {
        padding: 48px 0 30px;
      }

      .section {
        padding: 56px 0;
      }

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

      .btn {
        width: 100%;
        white-space: normal;
        text-align: center;
      }

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

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

      .item-action {
        align-items: stretch;
        min-width: 0;
      }

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

      .cta-band {
        padding: 24px;
      }

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