:root {
      --bg: #f7fbff;
      --card: rgba(255,255,255,0.88);
      --text: #111827;
      --sub: #667085;
      --brand: #5bbcff;
      --brand-deep: #3298f3;
      --purple: #c9b8ff;
      --line: rgba(17,24,39,0.08);
      --shadow: 0 16px 40px rgba(74, 144, 226, 0.12);
      --radius: 24px;
      --max: 1160px;
    }

    * { box-sizing: border-box; }
    body {
      margin: 0;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text);
      background:
        radial-gradient(circle at 15% 20%, rgba(91,188,255,0.18), transparent 28%),
        radial-gradient(circle at 80% 15%, rgba(201,184,255,0.22), transparent 24%),
        linear-gradient(180deg, #f8fbff 0%, #f7faff 44%, #ffffff 100%);
    }

    .wrap { width: min(var(--max), calc(100% - 32px)); margin: 0 auto; }

    .nav {
      position: sticky;
      top: 0;
      z-index: 20;
      backdrop-filter: blur(14px);
      background: rgba(247,251,255,0.78);
      border-bottom: 1px solid rgba(17,24,39,0.04);
    }

    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      min-height: 72px;
      gap: 16px;
    }

    .brand {
      display: flex;
      align-items: center;
      gap: 10px;
      text-decoration: none;
      color: var(--text);
      font-weight: 800;
      font-size: 28px;
      line-height: 1;
    }

    .logo {
      width: 42px;
      height: 42px;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
    }

    .logo img {
      width: 42px;
      height: 42px;
      display: block;
      border-radius: 12px;
    }

    .brand-text {
      display: block;
      line-height: 1;
      transform: translateY(-1px);
      letter-spacing: 0.01em;
    }

    .download-btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      min-width: 132px;
      height: 46px;
      padding: 0 18px;
      border-radius: 999px;
      border: none;
      background: linear-gradient(135deg, var(--brand) 0%, var(--brand-deep) 100%);
      color: #fff;
      font-size: 15px;
      font-weight: 700;
      text-decoration: none;
      box-shadow: 0 14px 24px rgba(50,152,243,0.28);
    }

    .hero {
      padding: 48px 0 28px;
    }

    .hero-card {
      position: relative;
      overflow: hidden;
      border-radius: 36px;
      background: linear-gradient(135deg, rgba(255,255,255,0.92), rgba(244,250,255,0.92));
      border: 1px solid rgba(17,24,39,0.05);
      box-shadow: var(--shadow);
      padding: 56px 32px;
    }

    .hero-card::before,
    .hero-card::after {
      content: "";
      position: absolute;
      border-radius: 999px;
      filter: blur(4px);
      pointer-events: none;
    }

    .hero-card::before {
      width: 340px;
      height: 340px;
      right: -60px;
      top: -80px;
      background: radial-gradient(circle, rgba(201,184,255,0.46), rgba(201,184,255,0) 68%);
    }

    .hero-card::after {
      width: 360px;
      height: 360px;
      left: -120px;
      bottom: -160px;
      background: radial-gradient(circle, rgba(91,188,255,0.30), rgba(91,188,255,0) 70%);
    }

    .hero-grid {
      position: relative;
      z-index: 1;
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 28px;
      align-items: center;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 8px 14px;
      border-radius: 999px;
      background: rgba(91,188,255,0.12);
      color: var(--brand-deep);
      font-weight: 700;
      font-size: 14px;
      margin-bottom: 18px;
    }

    h1 {
      margin: 0;
      font-size: clamp(38px, 7vw, 64px);
      line-height: 1.06;
      letter-spacing: -0.03em;
    }

    .hero p {
      margin: 18px 0 0;
      color: var(--sub);
      font-size: 18px;
      line-height: 1.8;
      max-width: 680px;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      margin-top: 28px;
      scroll-margin-top: 96px;
    }

    .ghost {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-width: 132px;
      height: 46px;
      border-radius: 999px;
      border: 1px solid rgba(17,24,39,0.08);
      background: rgba(255,255,255,0.7);
      color: var(--text);
      font-weight: 700;
      text-decoration: none;
    }

    .phone-mock {
      margin: 0 auto;
      width: min(100%, 320px);
      aspect-ratio: 10 / 19.5;
      border-radius: 34px;
      background: linear-gradient(180deg, #fefeff 0%, #eef8ff 100%);
      border: 10px solid #111827;
      box-shadow: 0 24px 50px rgba(17,24,39,0.18);
      padding: 16px;
      position: relative;
      overflow: hidden;
    }

    .phone-notch {
      position: absolute;
      top: 0;
      left: 50%;
      transform: translateX(-50%);
      width: 42%;
      height: 26px;
      background: #111827;
      border-bottom-left-radius: 16px;
      border-bottom-right-radius: 16px;
    }

    .bubble {
      border-radius: 22px;
      padding: 14px 16px;
      max-width: 82%;
      font-size: 14px;
      line-height: 1.6;
      box-shadow: 0 10px 24px rgba(50,152,243,0.10);
    }

    .bubble.a { background: #ffffff; margin-top: 80px; }
    .bubble.b { background: linear-gradient(135deg, #dff3ff, #e9e9ff); margin: 14px 0 0 auto; }
    .bubble.c { background: #ffffff; margin-top: 14px; }

    section {
      padding: 26px 0;
    }

    .section-title {
      margin: 0 0 16px;
      font-size: 30px;
      line-height: 1.2;
    }

    .section-sub {
      margin: 0 0 22px;
      color: var(--sub);
      font-size: 16px;
      line-height: 1.8;
    }

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

    .card {
      background: var(--card);
      border: 1px solid var(--line);
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: var(--shadow);
    }

    .card h3 {
      margin: 16px 0 10px;
      font-size: 22px;
    }

    .card p {
      margin: 0;
      color: var(--sub);
      line-height: 1.8;
      font-size: 15px;
    }

    .icon {
      width: 52px;
      height: 52px;
      border-radius: 16px;
      display: grid;
      place-items: center;
      background: linear-gradient(135deg, rgba(91,188,255,0.18), rgba(201,184,255,0.28));
      font-size: 24px;
    }

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

    .quote {
      background: linear-gradient(180deg, rgba(255,255,255,0.94), rgba(245,250,255,0.94));
      border: 1px solid var(--line);
      border-radius: 24px;
      padding: 24px;
      box-shadow: var(--shadow);
    }

    .quote strong {
      display: block;
      margin-bottom: 10px;
      font-size: 16px;
    }

    .quote p {
      margin: 0;
      color: var(--sub);
      line-height: 1.9;
      font-size: 15px;
    }

    .contact-box {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 18px;
      align-items: stretch;
    }

    .contact-list {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 14px;
      margin-top: 18px;
    }

    .contact-item {
      border: 1px solid var(--line);
      border-radius: 18px;
      background: rgba(255,255,255,0.72);
      padding: 18px;
    }

    .contact-item span {
      display: block;
      color: var(--sub);
      font-size: 13px;
      margin-bottom: 8px;
    }

    .contact-item strong {
      font-size: 18px;
      word-break: break-all;
    }

    .qrcode-card {
      display: grid;
      align-items: center;
      justify-items: center;
      text-align: center;
      padding: 24px;
      background: linear-gradient(180deg, rgba(255,255,255,0.95), rgba(244,249,255,0.92));
      border: 1px solid var(--line);
      border-radius: 24px;
      box-shadow: var(--shadow);
    }

    .qrcode {
      width: 170px;
      height: 170px;
      border-radius: 20px;
      background:
        linear-gradient(90deg, rgba(17,24,39,0.06) 50%, transparent 50%),
        linear-gradient(rgba(17,24,39,0.06) 50%, transparent 50%),
        #fff;
      background-size: 18px 18px;
      border: 10px solid #fff;
      box-shadow: inset 0 0 0 1px rgba(17,24,39,0.06), 0 18px 30px rgba(17,24,39,0.08);
      position: relative;
      margin-bottom: 16px;
    }

    .qrcode::before,
    .qrcode::after {
      content: "";
      position: absolute;
      width: 34px;
      height: 34px;
      border: 8px solid #111827;
      background: #fff;
    }

    .qrcode::before { top: 14px; left: 14px; }
    .qrcode::after { right: 14px; bottom: 14px; }

    .social {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 16px;
    }

    .tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 10px 14px;
      border-radius: 999px;
      background: rgba(91,188,255,0.12);
      color: #2467a9;
      font-weight: 700;
      font-size: 14px;
    }

    footer {
      padding: 30px 0 50px;
      color: #6b7280;
      font-size: 13px;
      line-height: 2;
    }

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

    .foot-card {
      background: rgba(255,255,255,0.72);
      border: 1px solid var(--line);
      border-radius: 22px;
      padding: 22px;
    }

    .brand-showcase {
      width: 172px;
      height: 172px;
      border-radius: 28px;
      display: block;
      box-shadow: 0 18px 34px rgba(91,188,255,0.18);
      margin-bottom: 18px;
    }

    .qrcode-note {
      margin-top: 6px;
      color: var(--sub);
      line-height: 1.8;
      font-size: 14px;
    }

    .footer-row {
      display: flex;
      align-items: center;
      justify-content: center;
      flex-wrap: wrap;
      gap: 10px 18px;
      text-align: center;
    }

    .footer-row + .footer-row {
      margin-top: 8px;
    }

    .footer-links a {
      font-weight: 600;
    }

    .record-link {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      white-space: nowrap;
    }

    .record-icon {
      width: 16px;
      height: 16px;
      display: inline-block;
      vertical-align: middle;
    }

    .footer-copy {
      white-space: nowrap;
    }

    @media (max-width: 920px) {
      .brand-showcase {
        width: 129px;
        height: 129px;
      }
    }

    @media (max-width: 920px) {
      .hero-grid,
      .contact-box,
      .grid-3,
      .quotes {
        grid-template-columns: 1fr;
      }

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

      .brand { font-size: 24px; }
      .hero-card { padding: 34px 20px; }
      .section-title { font-size: 26px; }
    }