:root {
    --ink: #0E1117;
    --muted: #64748b;
    --line: #e2e8f0;
    --soft: #f8fafc;
    --accent: #E3175B;
    --accent-hover: #C4124D;
    --accent-soft: #FDEEF3;
    --radius: 6px;
  }
  * { box-sizing: border-box; }
  html { scroll-behavior: smooth; }
  body {
    margin: 0;
    font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    color: var(--ink);
    background: #fff;
    line-height: 1.5;
  }
  a { color: inherit; text-decoration: none; }
  .wrap { max-width: 1120px; margin: 0 auto; padding: 0 20px; }

  /* header */
  header { position: sticky; top: 0; z-index: 10; background: rgba(255,255,255,.92); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
  .nav { display: flex; align-items: center; justify-content: space-between; height: 64px; }
  .logo { display: flex; align-items: center; }
  .logo img { height: 26px; width: auto; display: block; }
  .foot-logo { height: 22px; width: auto; display: block; margin-bottom: 10px; }
  .menu { display: flex; gap: 28px; font-size: 15px; color: var(--muted); }
  .menu a:hover { color: var(--ink); }
  .btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; height: 44px; padding: 0 20px; border-radius: var(--radius); font-size: 15px; font-weight: 500; border: 1px solid transparent; cursor: pointer; transition: background .15s, border-color .15s; }
  .btn-primary { background: var(--accent); color: #fff; }
  .btn-primary:hover { background: var(--accent-hover); }
  .btn-ghost { border-color: var(--line); background: #fff; }
  .btn-ghost:hover { border-color: #cbd5e1; background: var(--soft); }

  /* hero */
  .hero { padding: 88px 0 72px; text-align: center; }
  .chips { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px 14px; font-size: 14px; color: var(--muted); margin-bottom: 22px; }
  .chips span::after { content: "•"; margin-left: 14px; color: #cbd5e1; }
  .chips span:last-child::after { content: ""; margin: 0; }
  h1 { font-size: clamp(34px, 5.4vw, 56px); line-height: 1.1; font-weight: 700; letter-spacing: -0.02em; margin: 0 auto 18px; max-width: 820px; }
  h1 em { font-style: normal; color: var(--accent); }
  .lead { font-size: 19px; color: var(--muted); max-width: 640px; margin: 0 auto 32px; }
  .hero-cta { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
  .soon { display: inline-block; margin-bottom: 26px; padding: 6px 12px; border-radius: 999px; background: var(--accent-soft); color: var(--accent); font-size: 13px; font-weight: 600; }

  section { padding: 72px 0; }
  section.alt { background: var(--soft); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
  h2 { font-size: clamp(26px, 3.4vw, 36px); line-height: 1.2; font-weight: 700; letter-spacing: -0.01em; margin: 0 0 12px; text-align: center; }
  .sub { color: var(--muted); text-align: center; max-width: 620px; margin: 0 auto 44px; font-size: 17px; }

  /* steps */
  .steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
  .step { background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 26px; }
  .step-num { width: 36px; height: 36px; border-radius: 50%; background: var(--accent); color: #fff; display: grid; place-items: center; font-weight: 700; margin-bottom: 16px; }
  .step h3 { margin: 0 0 8px; font-size: 18px; }
  .step p { margin: 0; color: var(--muted); font-size: 15px; }

  /* features */
  .features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
  .feature { padding: 24px; border: 1px solid var(--line); border-radius: 10px; background: #fff; }
  .feature h3 { margin: 0 0 6px; font-size: 17px; }
  .feature p { margin: 0; color: var(--muted); font-size: 15px; }
  .ico { width: 40px; height: 40px; border-radius: 8px; background: var(--accent-soft); color: var(--accent); display: grid; place-items: center; margin-bottom: 14px; }
  .ico svg { width: 22px; height: 22px; }

  /* models */
  .tabs { display: flex; justify-content: center; gap: 8px; margin-bottom: 24px; flex-wrap: wrap; }
  .tab { height: 38px; padding: 0 16px; border-radius: var(--radius); border: 1px solid var(--line); background: #fff; font-size: 14px; cursor: pointer; color: var(--muted); }
  .tab[aria-selected="true"] { background: var(--ink); border-color: var(--ink); color: #fff; }
  .models { border: 1px solid var(--line); border-radius: 10px; overflow: hidden; background: #fff; }
  .model { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 12px; align-items: center; padding: 16px 22px; border-top: 1px solid var(--line); font-size: 15px; }
  .model:first-child { border-top: 0; }
  .model.head { background: var(--soft); font-size: 13px; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
  .model .name { font-weight: 600; }
  .model .vendor { display: block; font-weight: 400; font-size: 13px; color: var(--muted); }
  .model .tag { font-size: 14px; color: var(--muted); }
  .model .cost { text-align: right; font-weight: 600; }
  .model .cost small { font-weight: 400; color: var(--muted); }
  .note { color: var(--muted); font-size: 13px; text-align: center; margin-top: 14px; }

  /* cards */
  .cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
  .card { position: relative; border: 1px solid var(--line); border-radius: 12px; padding: 28px; background: #fff; display: flex; flex-direction: column; }
  .card.featured { border: 2px solid var(--accent); }
  .badge { position: absolute; top: -12px; left: 28px; background: var(--accent); color: #fff; font-size: 12px; font-weight: 600; padding: 3px 10px; border-radius: 999px; }
  .card h3 { margin: 0 0 4px; font-size: 18px; }
  .price { font-size: 36px; font-weight: 700; margin: 10px 0 2px; }
  .price small { font-size: 16px; font-weight: 500; color: var(--muted); }
  .neurons { color: var(--accent); font-weight: 600; margin-bottom: 18px; }
  .card ul { list-style: none; padding: 0; margin: 0 0 4px; color: var(--muted); font-size: 15px; }
  .card li { padding: 6px 0; border-top: 1px dashed var(--line); }
  .card li:first-child { border-top: 0; }
  .cards.video { grid-template-columns: repeat(2, 1fr); max-width: 760px; margin: 28px auto 0; }
  .card.video-card { background: linear-gradient(180deg, #fff, var(--accent-soft)); }

  /* business */
  .biz { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
  .biz .feature { padding: 30px; }
  .biz ul { margin: 12px 0 0; padding-left: 18px; color: var(--muted); font-size: 15px; }
  .biz li { margin: 6px 0; }

  /* faq */
  .faq { max-width: 760px; margin: 0 auto; }
  details { border-bottom: 1px solid var(--line); padding: 18px 0; }
  summary { cursor: pointer; font-weight: 600; font-size: 17px; list-style: none; display: flex; justify-content: space-between; gap: 16px; }
  summary::-webkit-details-marker { display: none; }
  summary::after { content: "+"; color: var(--muted); font-weight: 400; font-size: 22px; line-height: 1; }
  details[open] summary::after { content: "−"; }
  details p { color: var(--muted); margin: 10px 0 0; font-size: 15px; }

  .final { text-align: center; padding: 80px 0; }
  .final p { color: var(--muted); margin: 0 0 26px; font-size: 17px; }

  footer { border-top: 1px solid var(--line); padding: 36px 0 44px; font-size: 13px; color: var(--muted); }
  .foot { display: grid; grid-template-columns: 1.3fr 1fr; gap: 28px; }
  .foot p { margin: 4px 0; }
  .foot-links { display: flex; gap: 20px; flex-wrap: wrap; justify-content: flex-end; }
  .foot-links a:hover { color: var(--ink); }
  .tm { margin-top: 20px; font-size: 12px; color: #94a3b8; }

  @media (max-width: 900px) {
    .menu { display: none; }
    .steps, .features, .cards { grid-template-columns: 1fr; }
    .cards.video, .biz { grid-template-columns: 1fr; }
    .foot { grid-template-columns: 1fr; }
    .foot-links { justify-content: flex-start; }
    .hero { padding: 60px 0 52px; }
    section { padding: 56px 0; }
  }
  @media (max-width: 560px) {
    .wrap { padding: 0 16px; }
    .model { grid-template-columns: 1fr auto; padding: 14px 16px; }
    .model .tag { display: none; }
    .nav .btn { height: 38px; padding: 0 14px; font-size: 14px; }
  }