:root {
    --bg: #070b14;
    --bg2: #0b1322;
    --surface: rgba(255, 255, 255, 0.035);
    --surface-2: rgba(255, 255, 255, 0.06);
    --border: rgba(255, 255, 255, 0.09);
    --border-strong: rgba(255, 255, 255, 0.16);
    --text: #eef1f8;
    --muted: #9aa6bf;
    --muted-2: #6b7894;
    --brand: #6366f1;
    --brand-2: #8b5cf6;
    --accent: #22d3ee;
    --good: #34d399;
    --warn: #fbbf24;
    --danger: #fb7185;
    --grad: linear-gradient(120deg, #818cf8 0%, #a78bfa 45%, #22d3ee 100%);
    --grad-soft: linear-gradient(135deg, rgba(99,102,241,.18), rgba(34,211,238,.10));
    --radius: 18px;
    --shadow: 0 24px 60px -24px rgba(0,0,0,.7);
    --maxw: 1180px;
    --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
    --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  }

  * { box-sizing: border-box; margin: 0; padding: 0; }
  html { scroll-behavior: smooth; }
  body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
  }

  /* ---------- ambient background ---------- */
  .bg-orbs { position: fixed; inset: 0; z-index: 0; pointer-events: none; overflow: hidden; }
  .orb { position: absolute; border-radius: 50%; filter: blur(90px); opacity: .5; }
  .orb.a { width: 520px; height: 520px; background: #4f46e5; top: -160px; left: -120px; }
  .orb.b { width: 460px; height: 460px; background: #0891b2; top: 240px; right: -140px; opacity:.4; }
  .orb.c { width: 420px; height: 420px; background: #7c3aed; bottom: -160px; left: 30%; opacity:.32; }
  .grid-overlay {
    position: fixed; inset: 0; z-index: 0; pointer-events: none;
    background-image: linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px),
                      linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px);
    background-size: 48px 48px;
    mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 30%, transparent 80%);
  }

  .container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; position: relative; z-index: 1; }

  /* ---------- legacy nav (kept for .logo/.btn) ---------- */
  .logo { display: flex; align-items: center; gap: 11px; font-weight: 800; font-size: 18px; letter-spacing: .2px; }
  .logo .mark {
    width: 34px; height: 34px; border-radius: 10px; display: grid; place-items: center;
    background: var(--grad); box-shadow: 0 6px 18px -6px #6366f1; flex: none;
  }
  .logo .mark svg { width: 20px; height: 20px; }
  .logo small { display:block; font-size: 10.5px; font-weight: 600; color: var(--muted); letter-spacing: 2px; }

  .btn {
    display: inline-flex; align-items: center; gap: 8px; cursor: pointer;
    font-weight: 700; font-size: 14.5px; text-decoration: none; border: none;
    padding: 11px 20px; border-radius: 11px; transition: transform .15s, box-shadow .2s, background .2s;
    font-family: inherit;
  }
  .btn-primary { background: var(--grad); color: #0a0a1a; box-shadow: 0 10px 26px -10px #7c5cff; }
  .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 34px -10px #7c5cff; }
  .btn-ghost { background: var(--surface-2); color: var(--text); border: 1px solid var(--border-strong); }
  .btn-ghost:hover { background: rgba(255,255,255,.12); transform: translateY(-2px); }
  .btn.lg { padding: 15px 28px; font-size: 16px; border-radius: 13px; }

  /* ---------- hero ---------- */
  .hero { padding: 84px 0 56px; }
  .hero-grid { display: grid; grid-template-columns: 1.08fr .92fr; gap: 54px; align-items: center; }
  .eyebrow {
    display: inline-flex; align-items: center; gap: 9px; font-size: 13px; font-weight: 600;
    color: #c7d0ea; background: var(--grad-soft); border: 1px solid var(--border-strong);
    padding: 7px 14px; border-radius: 999px; margin-bottom: 24px;
  }
  .eyebrow .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--good); box-shadow: 0 0 10px var(--good); }
  h1.hero-title { font-size: 56px; line-height: 1.08; font-weight: 850; letter-spacing: -1px; }
  h1.hero-title .g { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
  .hero-sub { margin-top: 22px; font-size: 18.5px; color: var(--muted); max-width: 540px; }
  .hero-sub b { color: var(--text); font-weight: 700; }
  .hero-cta { display: flex; gap: 14px; margin-top: 34px; flex-wrap: wrap; }
  .hero-note { margin-top: 18px; font-size: 13px; color: var(--muted-2); display:flex; align-items:center; gap: 8px; }

  /* hero chat demo */
  .demo {
    background: linear-gradient(180deg, rgba(20,28,48,.9), rgba(11,17,30,.92));
    border: 1px solid var(--border-strong); border-radius: 22px; padding: 18px;
    box-shadow: var(--shadow); position: relative;
  }
  .demo::before {
    content: ""; position: absolute; inset: -1px; border-radius: 22px; padding: 1px;
    background: var(--grad); -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor; mask-composite: exclude; opacity: .55; pointer-events:none;
  }
  .demo-head { display: flex; align-items: center; gap: 8px; padding: 4px 6px 14px; border-bottom: 1px solid var(--border); }
  .demo-head .dot3 { width: 11px; height: 11px; border-radius: 50%; }
  .demo-head .r { background: #ff5f57; } .demo-head .y { background: #febc2e; } .demo-head .g { background: #28c840; }
  .demo-head .t { margin-left: 10px; font-size: 12.5px; color: var(--muted); font-family: var(--mono); }
  .chat { padding: 16px 10px 6px 6px; display: flex; flex-direction: column; gap: 14px; max-height: 360px; overflow-y: auto; }
  .chat::-webkit-scrollbar { width: 6px; }
  .chat::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 3px; }
  .chat .day { align-self: center; font-size: 11px; color: var(--muted-2); letter-spacing: 1px; margin: 2px 0; }
  .msg { max-width: 85%; padding: 11px 15px; border-radius: 14px; font-size: 14.5px; position: relative; }
  .msg.user { align-self: flex-end; background: var(--surface-2); border: 1px solid var(--border); border-bottom-right-radius: 4px; }
  .msg.ai { align-self: flex-start; background: rgba(99,102,241,.14); border: 1px solid rgba(129,140,248,.35); border-bottom-left-radius: 4px; }
  .msg .who { font-size: 11px; color: var(--muted-2); margin-bottom: 3px; font-weight: 600; }
  .recall-chip {
    align-self: flex-start; display: inline-flex; align-items: center; gap: 7px;
    font-size: 12px; color: var(--accent); background: rgba(34,211,238,.1);
    border: 1px dashed rgba(34,211,238,.4); padding: 6px 11px; border-radius: 999px; font-weight: 600;
  }
  .recall-chip svg { width: 13px; height: 13px; }
  .recall-chip.evo { color: #fbbf24; background: rgba(251,191,36,.10); border-color: rgba(251,191,36,.45); }

  /* ---------- stat strip ---------- */
  .stats { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; margin-top: 64px; }
  .stat { text-align: center; padding: 22px 12px; background: var(--surface); border: 1px solid var(--border); border-radius: 16px; }
  .stat .n { font-size: 30px; font-weight: 850; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; letter-spacing: -.5px; }
  .stat .l { font-size: 12.5px; color: var(--muted); margin-top: 4px; }

  /* ---------- section ---------- */
  section { padding: 84px 0; position: relative; z-index: 1; }
  .sec-head { max-width: 720px; margin: 0 auto 50px; text-align: center; }
  .sec-eyebrow { font-size: 17px; font-weight: 700; letter-spacing: 2px; text-transform: uppercase;
    background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
  .sec-title { font-size: 38px; font-weight: 820; margin-top: 14px; letter-spacing: -.6px; line-height: 1.15; }
  .sec-sub { font-size: 17px; color: var(--muted); margin-top: 16px; }

  /* ---------- pain cards ---------- */
  .pain-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
  .pain {
    background: linear-gradient(180deg, rgba(251,113,133,.06), rgba(255,255,255,.02));
    border: 1px solid rgba(251,113,133,.2); border-radius: var(--radius); padding: 26px 22px;
  }
  .pain .ic { font-size: 26px; margin-bottom: 14px; display:block; }
  .pain h3 { font-size: 17px; font-weight: 750; margin-bottom: 9px; }
  .pain p { font-size: 14px; color: var(--muted); }
  .pain .quote { margin-top: 14px; font-size: 13px; color: #f9b4be; background: rgba(251,113,133,.08);
    border-left: 3px solid var(--danger); padding: 8px 12px; border-radius: 0 8px 8px 0; font-style: italic; }

  /* ---------- what-is ---------- */
  .whatis { background: linear-gradient(135deg, rgba(99,102,241,.12), rgba(34,211,238,.06));
    border: 1px solid var(--border-strong); border-radius: 28px; padding: 56px; text-align:center; }
  .whatis .big { font-size: 30px; font-weight: 800; line-height: 1.4; max-width: 880px; margin: 0 auto; letter-spacing:-.3px; }
  .whatis .big .g { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
  .whatis .analogy { margin-top: 26px; display: grid; grid-template-columns: repeat(4,1fr); gap: 14px; }
  .analogy .a { background: rgba(255,255,255,.04); border: 1px solid var(--border); border-radius: 14px; padding: 18px 14px; }
  .analogy .a .e { font-size: 24px; } .analogy .a .h { font-weight: 700; font-size: 14.5px; margin: 8px 0 4px; }
  .analogy .a .d { font-size: 12.5px; color: var(--muted); }

  /* ---------- value cards ---------- */
  .val-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
  .val {
    background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
    padding: 26px 22px; transition: transform .2s, border-color .2s, background .2s;
  }
  .val:hover { transform: translateY(-5px); border-color: var(--border-strong); background: var(--surface-2); }
  .val .ic { width: 46px; height: 46px; border-radius: 12px; display: grid; place-items: center;
    background: var(--grad-soft); border: 1px solid var(--border-strong); margin-bottom: 16px; }
  .val .ic svg { width: 23px; height: 23px; stroke: #c4b5fd; }
  .val h3 { font-size: 16.5px; font-weight: 750; margin-bottom: 8px; }
  .val p { font-size: 13.5px; color: var(--muted); }

  /* ---------- how it works ---------- */
  .how-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: 48px; align-items: center; }
  .steps { display: flex; flex-direction: column; gap: 20px; }
  .step { display: flex; gap: 18px; align-items: flex-start; }
  .step .num { flex: none; width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center;
    font-weight: 800; font-size: 18px; background: var(--grad); color: #0a0a1a; }
  .step h3 { font-size: 18px; font-weight: 750; margin-bottom: 5px; }
  .step p { font-size: 14.5px; color: var(--muted); }
  /* pyramid */
  .pyramid { display: flex; flex-direction: column; gap: 8px; align-items: center; }
  .pyramid .cap { font-size: 12.5px; color: var(--muted-2); margin-bottom: 4px; }
  .layer { width: 100%; border-radius: 12px; padding: 13px 18px; display: flex; justify-content: space-between; align-items:center;
    border: 1px solid var(--border-strong); font-weight: 650; font-size: 14px; }
  .layer .tag { font-family: var(--mono); font-size: 11px; color: var(--muted); }
  .layer.l1 { width: 100%; background: rgba(99,102,241,.10); }
  .layer.l2 { width: 88%; background: rgba(124,92,246,.13); }
  .layer.l3 { width: 76%; background: rgba(139,92,246,.16); }
  .layer.l4 { width: 64%; background: rgba(124,58,237,.19); }
  .layer.l5 { width: 52%; background: rgba(34,211,238,.16); }
  .layer.l6 { width: 40%; background: rgba(34,211,238,.22); justify-content:center; }

  /* ---------- compare ---------- */
  .compare-wrap { max-width: 920px; margin: 0 auto; border: 1px solid var(--border-strong); border-radius: 22px; overflow: hidden; }
  table.compare { width: 100%; border-collapse: collapse; }
  table.compare th, table.compare td { padding: 18px 22px; text-align: left; font-size: 15px; border-bottom: 1px solid var(--border); }
  table.compare thead th { background: rgba(255,255,255,.03); font-size: 14px; }
  table.compare thead th:nth-child(2) { color: var(--muted); }
  table.compare thead th:nth-child(3) { background: var(--grad-soft); }
  table.compare tbody td:first-child { color: var(--muted); font-weight: 600; width: 26%; }
  table.compare td.bad { color: #f9b4be; }
  table.compare td.good { background: rgba(52,211,153,.06); color: #b9f2dd; font-weight: 600; }
  table.compare td.good::before { content: "✓ "; color: var(--good); font-weight: 800; }
  table.compare td.bad::before { content: "✕ "; color: var(--danger); font-weight: 800; }
  table.compare tbody tr:last-child td { border-bottom: none; }

  /* ---------- scenarios ---------- */
  .scn-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
  .scn { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 26px 22px;
    transition: transform .2s, border-color .2s; }
  .scn:hover { transform: translateY(-5px); border-color: var(--border-strong); }
  .scn .e { font-size: 30px; } .scn h3 { font-size: 17px; font-weight: 750; margin: 14px 0 8px; }
  .scn p { font-size: 13.5px; color: var(--muted); }

  /* ---------- ecosystem ---------- */
  .eco { text-align: center; }
  .eco-hub {
    margin: 0 auto 30px; width: 100%; max-width: 760px;
    background: var(--grad-soft); border: 1px solid var(--border-strong); border-radius: 18px;
    padding: 22px; font-weight: 750; font-size: 19px; position: relative;
  }
  .eco-hub .g { background: var(--grad); -webkit-background-clip: text; background-clip:text; color: transparent; }
  .eco-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; }
  .eco-card { background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 20px 12px; transition: border-color .2s, transform .2s; }
  .eco-card:hover { border-color: var(--border-strong); transform: translateY(-4px); }
  .eco-card .e { font-size: 22px; } .eco-card .n { font-size: 13.5px; font-weight: 700; margin-top: 9px; }
  .eco-card .d { font-size: 11.5px; color: var(--muted-2); margin-top: 3px; }

  /* ---------- trust ---------- */
  .trust-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
  .trust { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 26px 22px; }
  .trust .ic { font-size: 24px; margin-bottom: 12px; } .trust h3 { font-size: 16px; font-weight: 750; margin-bottom: 8px; }
  .trust p { font-size: 13.5px; color: var(--muted); }

  /* ---------- metrics ---------- */
  .metrics-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; max-width: 980px; margin: 0 auto; }
  .metric { text-align: center; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 30px 18px; }
  .metric .n { font-size: 40px; font-weight: 850; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; letter-spacing: -1px; }
  .metric .l { font-size: 13.5px; color: var(--muted); margin-top: 8px; }
  .note-line { text-align: center; color: var(--muted-2); font-size: 12.5px; margin-top: 22px; }
  .placeholder-badge { display: inline-block; font-size: 11px; color: var(--warn); border: 1px dashed rgba(251,191,36,.5); padding: 3px 9px; border-radius: 999px; margin-left: 6px; vertical-align: middle; }

  /* ---------- testimonials ---------- */
  .tst-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
  .tst { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 26px 22px; display: flex; flex-direction: column; gap: 16px; }
  .tst .q { font-size: 14.5px; color: var(--text); line-height: 1.7; }
  .tst .who { display: flex; align-items: center; gap: 12px; margin-top: auto; }
  .tst .av { width: 42px; height: 42px; border-radius: 50%; background: var(--grad-soft); border: 1px solid var(--border-strong); flex: none; }
  .tst .who .nm { font-weight: 700; font-size: 14px; }
  .tst .who .rl { font-size: 12px; color: var(--muted); }
  .logos { display: flex; flex-wrap: wrap; gap: 14px; justify-content: center; margin-top: 34px; }
  .logos .lg { width: 124px; height: 46px; border-radius: 10px; background: var(--surface); border: 1px dashed var(--border-strong); display: grid; place-items: center; color: var(--muted-2); font-size: 12px; }

  /* ---------- final cta ---------- */
  .cta-final { text-align: center; background: linear-gradient(135deg, rgba(99,102,241,.18), rgba(34,211,238,.1));
    border: 1px solid var(--border-strong); border-radius: 28px; padding: 64px 40px; }
  .cta-final h2 { font-size: 40px; font-weight: 840; letter-spacing: -.6px; }
  .cta-final h2 .g { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
  .cta-final p { font-size: 17px; color: var(--muted); margin: 18px auto 32px; max-width: 560px; }
  .cta-row { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

  /* ---------- footer ---------- */
  footer { border-top: 1px solid var(--border); padding: 40px 0; margin-top: 30px; }
  .foot-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 16px; }
  .foot-inner .muted { color: var(--muted-2); font-size: 13px; }
  .foot-tags { display:flex; gap: 10px; flex-wrap: wrap; }
  .foot-tags span { font-size: 12px; color: var(--muted); border: 1px solid var(--border); padding: 5px 11px; border-radius: 999px; }

  /* ---------- reveal anim ---------- */
  .reveal { opacity: 0; transform: translateY(24px); transition: opacity .6s ease, transform .6s ease; }
  .reveal.in { opacity: 1; transform: none; }

  /* ---------- 破误解 / 差异翻转 / 分割线 / 记忆不膨胀 ---------- */
  .myth-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
  .myth { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px 24px; }
  .myth .bad { color: var(--danger); font-weight: 800; font-size: 17px; margin-bottom: 12px; }
  .myth .bad::before { content: "✕ "; }
  .myth .body { font-size: 14px; color: var(--muted); line-height: 1.7; }
  .myth .good { margin-top: 16px; padding-top: 16px; border-top: 1px dashed var(--border-strong); color: var(--good); font-weight: 700; font-size: 13.5px; }
  .myth .good::before { content: "✓ "; font-weight: 800; }
  .conclusion { max-width: 880px; margin: 28px auto 0; text-align: center; background: var(--grad-soft); border: 1px solid var(--border-strong); border-radius: 16px; padding: 24px 28px; font-size: 18px; font-weight: 700; line-height: 1.65; }
  .conclusion .g { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
  .diff-flip { display: grid; grid-template-columns: 1fr auto 1fr; gap: 18px; align-items: center; max-width: 860px; margin: 0 auto; }
  .diff-flip .side { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; text-align: center; }
  .diff-flip .side.them { opacity: .72; }
  .diff-flip .side.us { background: var(--grad-soft); border-color: var(--border-strong); }
  .diff-flip .side .lab { font-size: 12.5px; color: var(--muted-2); margin-bottom: 8px; }
  .diff-flip .side .big { font-size: 19px; font-weight: 800; }
  .diff-flip .vs { font-weight: 800; color: var(--brand); font-size: 16px; }
  .divider { max-width: 1180px; margin: 0 auto; height: 1px; background: linear-gradient(90deg, transparent, var(--border-strong) 18%, var(--border-strong) 82%, transparent); }
  .adv-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
  @media (max-width: 760px) { .diff-flip, .adv-grid, .myth-grid { grid-template-columns: 1fr; } .diff-flip .vs { transform: rotate(90deg); } }

  /* ---------- topbar + 左侧目录 ---------- */
  body { padding-top: 66px; padding-left: 220px; }
  section[id] { scroll-margin-top: 84px; }
  .topbar { position: fixed; top: 0; left: 0; right: 0; height: 66px; z-index: 60; display: flex; align-items: center; background: rgba(7, 11, 20, .72); backdrop-filter: blur(14px); border-bottom: 1px solid var(--border); }
  .topbar-inner { width: 100%; padding: 0 24px; display: flex; align-items: center; }
  .topbar-actions { margin-left: auto; display: flex; gap: 10px; align-items: center; }
  .toc { position: fixed; top: 66px; left: 0; bottom: 0; width: 220px; padding: 26px 16px; display: flex; flex-direction: column; gap: 4px; border-right: 1px solid var(--border); background: rgba(7, 11, 20, .55); backdrop-filter: blur(14px); overflow-y: auto; z-index: 50; }
  .toc-title { font-size: 12px; font-weight: 700; letter-spacing: 2px; color: var(--muted-2); padding: 0 12px 6px; }
  .toc-group { font-size: 11.5px; font-weight: 700; letter-spacing: 1px; color: var(--brand); padding: 14px 12px 4px; }
  .toc a { color: var(--muted); text-decoration: none; font-size: 14.5px; font-weight: 500; padding: 9px 12px; border-radius: 9px; transition: color .2s, background .2s; }
  .toc a:hover { color: var(--text); background: var(--surface-2); }
  @media (max-width: 940px) {
    body { padding-left: 0; padding-top: 60px; }
    .topbar { height: 60px; }
    .topbar .logo small { display: none; }
    .topbar-actions .btn { white-space: nowrap; padding: 9px 14px; font-size: 13px; }
    .toc { display: none; }
  }

  /* ---------- responsive ---------- */
  @media (max-width: 940px) {
    .hero-grid, .how-grid { grid-template-columns: 1fr; gap: 40px; }
    h1.hero-title { font-size: 42px; }
    .stats { grid-template-columns: repeat(2, 1fr); }
    .pain-grid, .val-grid, .scn-grid, .trust-grid, .analogy { grid-template-columns: repeat(2, 1fr); }
    .eco-grid { grid-template-columns: repeat(3, 1fr); }
    .metrics-grid { grid-template-columns: repeat(2, 1fr); }
    .tst-grid { grid-template-columns: 1fr; }
    .sec-title { font-size: 30px; } .whatis { padding: 36px 24px; } .whatis .big { font-size: 23px; }
    .cta-final h2 { font-size: 30px; }
  }
  @media (max-width: 540px) {
    .pain-grid, .val-grid, .scn-grid, .trust-grid, .analogy, .eco-grid, .stats, .metrics-grid { grid-template-columns: 1fr; }
    h1.hero-title { font-size: 34px; } .whatis .big { font-size: 20px; }
  }