*{ margin:0; padding:0; box-sizing:border-box; }
  :root{
    --bg:#fbfbfd;
    --surface:#ffffff;
    --surface-2:#f5f5f7;
    --ink:#1d1d1f;
    --muted:#86868b;
    --accent:#0071e3;
    --accent-hover:#0077ed;
    --line:#d2d2d7;
    --shadow-hover:0 20px 44px -12px rgba(0,0,0,0.12);
    --nav-bg:rgba(251,251,253,0.72);
    --radius-sm:10px;
    --radius-md:18px;
    --radius-lg:22px;
    --radius-pill:980px;
    --ease:cubic-bezier(0.4,0,0.2,1);
    --dur:0.5s;
    --font:-apple-system,BlinkMacSystemFont,"SF Pro Display","SF Pro Text","PingFang SC","Helvetica Neue","Microsoft YaHei",sans-serif;
  }
  [data-theme="dark"]{
    --bg:#000000;
    --surface:#1d1d1f;
    --surface-2:#2c2c2e;
    --ink:#f5f5f7;
    --muted:#86868b;
    --accent:#2997ff;
    --accent-hover:#47a3ff;
    --line:#38383a;
    --shadow-hover:0 20px 44px -12px rgba(0,0,0,0.6);
    --nav-bg:rgba(0,0,0,0.72);
  }
  html{ scroll-behavior:smooth; -webkit-font-smoothing:antialiased; }
  body{
    font-family:var(--font);
    background:var(--bg);
    color:var(--ink);
    line-height:1.5;
    font-size:17px;
    transition:background var(--dur) var(--ease), color var(--dur) var(--ease);
  }
  a{ color:inherit; text-decoration:none; }
  .wrap{ max-width:980px; margin:0 auto; padding:0 22px; }

  /* nav */
  nav{
    position:fixed; top:0; left:0; right:0; z-index:100;
    backdrop-filter:saturate(180%) blur(20px);
    -webkit-backdrop-filter:saturate(180%) blur(20px);
    background:transparent;
    transition:background var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
  }
  nav.scrolled{ background:var(--nav-bg); box-shadow:0 1px 0 var(--line); }
  .nav-inner{
    max-width:980px; margin:0 auto; padding:0 22px;
    height:48px; display:flex; align-items:center; justify-content:space-between;
    font-size:14px;
  }
  .nav-brand{ font-weight:600; letter-spacing:-0.01em; }
  .nav-links{ display:flex; gap:28px; }
  .nav-links a{ color:var(--muted); transition:color 0.2s; }
  .nav-links a:hover{ color:var(--ink); }
  .theme-toggle{
    background:none; border:none; cursor:pointer; padding:6px;
    color:var(--ink); display:flex; align-items:center;
    border-radius:var(--radius-pill);
    transition:background 0.2s;
  }
  .theme-toggle:hover{ background:var(--surface-2); }
  .theme-toggle svg{ width:18px; height:18px; }
  .icon-sun{ display:none; }
  [data-theme="dark"] .icon-sun{ display:block; }
  [data-theme="dark"] .icon-moon{ display:none; }

  /* hero */
  .hero{ padding:160px 0 100px; text-align:center; }
  .tag{
    display:inline-block; font-size:13px; color:var(--accent);
    background:var(--accent-soft,rgba(0,113,227,0.08));
    padding:6px 14px; border-radius:var(--radius-pill);
    letter-spacing:0.02em; margin-bottom:28px; font-weight:500;
  }
  [data-theme="dark"] .tag{ background:rgba(41,151,255,0.12); }
  h1{
    font-size:clamp(36px,7vw,64px); font-weight:600;
    line-height:1.07; letter-spacing:-0.02em;
    margin-bottom:22px; max-width:820px; margin-left:auto; margin-right:auto;
  }
  .lede{
    font-size:clamp(17px,2.2vw,21px); color:var(--muted);
    max-width:560px; margin:0 auto 40px; line-height:1.45;
  }
  .cta-group{ display:flex; gap:14px; justify-content:center; flex-wrap:wrap; }
  .btn{
    display:inline-flex; align-items:center; justify-content:center;
    padding:12px 24px; border-radius:var(--radius-pill);
    font-size:16px; font-weight:400; cursor:pointer;
    transition:all 0.25s var(--ease); border:none; font-family:inherit;
  }
  .btn-primary{ background:var(--accent); color:#fff; }
  .btn-primary:hover{ background:var(--accent-hover); transform:translateY(-1px); }
  .btn-ghost{ background:transparent; color:var(--accent); }
  .btn-ghost:hover{ background:var(--accent-soft,rgba(0,113,227,0.08)); }
  [data-theme="dark"] .btn-ghost:hover{ background:rgba(41,151,255,0.12); }

  /* geo entry */
  .geo-grid{ display:grid; grid-template-columns:repeat(2,1fr); gap:18px; margin-top:8px; }
  .geo-card{
    display:block;
    background:var(--surface); border:1px solid var(--line);
    border-radius:var(--radius-lg); padding:26px 30px;
    transition:transform 0.35s var(--ease), box-shadow 0.35s var(--ease), border-color 0.35s;
  }
  .geo-card:hover{ transform:translateY(-4px); box-shadow:var(--shadow-hover); border-color:transparent; }
  .geo-card-inner{ display:flex; align-items:center; gap:20px; }
  .geo-icon{
    width:52px; height:52px; border-radius:var(--radius-md);
    background:var(--surface-2); display:flex; align-items:center; justify-content:center;
    color:var(--accent); flex-shrink:0;
  }
  .geo-icon svg{ width:28px; height:28px; }
  .geo-meta{ flex:1; min-width:0; }
  .geo-title{ font-size:19px; font-weight:600; letter-spacing:-0.01em; }
  .geo-sub{ color:var(--muted); font-size:14px; margin-top:4px; }
  .geo-arrow{ color:var(--muted); font-size:24px; transition:transform 0.25s var(--ease), color 0.25s; }
  .geo-card:hover .geo-arrow{ color:var(--accent); transform:translateX(4px); }
  .geo-live{
    margin-top:10px; display:inline-flex; align-items:center; gap:8px;
    font-size:13px; color:var(--muted);
  }
  .geo-live strong{
    color:var(--accent); font-weight:600;
    font-variant-numeric:tabular-nums;
    transition:opacity 0.25s var(--ease);
    display:inline-block; min-width:1.4em; text-align:right;
  }
  .live-dot{
    width:8px; height:8px; border-radius:50%; background:#34c759;
    animation:livePulse 2s infinite;
  }
  @keyframes livePulse{
    0%{ box-shadow:0 0 0 0 rgba(52,199,89,0.5); }
    70%{ box-shadow:0 0 0 8px rgba(52,199,89,0); }
    100%{ box-shadow:0 0 0 0 rgba(52,199,89,0); }
  }
  @media (prefers-reduced-motion:reduce){
    .live-dot{ animation:none; }
  }

  /* sections */
  section.block{ padding:90px 0; border-top:1px solid var(--line); }
  .eyebrow{
    font-size:13px; color:var(--accent); font-weight:500;
    letter-spacing:0.04em; margin-bottom:14px;
  }
  .block h2{
    font-size:clamp(28px,4vw,40px); font-weight:600;
    letter-spacing:-0.02em; margin-bottom:14px; line-height:1.1;
  }
  .block .intro{ color:var(--muted); font-size:19px; max-width:620px; margin-bottom:48px; line-height:1.45; }

  /* ability cards */
  .cards{ display:grid; grid-template-columns:repeat(3,1fr); gap:20px; }
  .card{
    background:var(--surface); border:1px solid var(--line);
    border-radius:var(--radius-lg); padding:32px 28px;
    transition:transform 0.35s var(--ease), box-shadow 0.35s var(--ease), border-color 0.35s;
  }
  .card:hover{ transform:translateY(-6px); box-shadow:var(--shadow-hover); border-color:transparent; }
  .card-icon{
    width:44px; height:44px; border-radius:var(--radius-md);
    background:var(--surface-2); display:flex; align-items:center; justify-content:center;
    margin-bottom:20px; color:var(--accent);
  }
  .card-icon svg{ width:24px; height:24px; }
  .card h3{ font-size:20px; font-weight:600; margin-bottom:10px; letter-spacing:-0.01em; }
  .card p{ color:var(--muted); font-size:15px; line-height:1.5; }

  /* stats */
  .stats{ display:grid; grid-template-columns:repeat(4,1fr); gap:24px; }
  .stat{ border-top:1px solid var(--line); padding-top:20px; }
  .stat .num{
    font-size:clamp(40px,6vw,56px); font-weight:600;
    letter-spacing:-0.03em; line-height:1; color:var(--ink);
  }
  .stat .num .suffix{ color:var(--accent); }
  .stat .lbl{ color:var(--muted); font-size:14px; margin-top:10px; }

  /* now list */
  .now-list{ list-style:none; }
  .now-list li{
    padding:24px 0; border-bottom:1px solid var(--line);
    display:flex; justify-content:space-between; align-items:baseline; gap:20px;
    transition:padding-left 0.3s var(--ease);
  }
  .now-list li:hover{ padding-left:8px; }
  .now-list li:first-child{ border-top:1px solid var(--line); }
  .now-list .name{ font-size:20px; font-weight:500; letter-spacing:-0.01em; }
  .now-list .desc{ color:var(--muted); font-size:15px; text-align:right; }

  /* quote */
  .quote{
    text-align:center; padding:90px 0;
  }
  .quote p{
    font-size:clamp(24px,3.5vw,32px); font-weight:500;
    letter-spacing:-0.02em; line-height:1.3; max-width:720px; margin:0 auto;
  }
  .quote .mark{ color:var(--accent); }

  /* contact */
  .contact{ padding:90px 0 120px; text-align:center; border-top:1px solid var(--line); }
  .contact .eyebrow{ margin-bottom:18px; }
  .contact h2{ margin-bottom:16px; }
  .contact .lede{ margin-bottom:36px; }
  .contact-name{ font-size:14px; color:var(--muted); margin-top:32px; }

  /* reveal animation */
  .reveal{ opacity:0; transform:translateY(28px); transition:opacity 0.9s var(--ease), transform 0.9s var(--ease); }
  .reveal.in{ opacity:1; transform:none; }

  @media (max-width:760px){
    .cards{ grid-template-columns:1fr; }
    .geo-grid{ grid-template-columns:1fr; }
    .stats{ grid-template-columns:repeat(2,1fr); gap:20px; }
    .nav-links{ display:none; }
    .hero{ padding:120px 0 70px; }
    .now-list li{ flex-direction:column; gap:6px; align-items:flex-start; }
    .now-list .desc{ text-align:left; }
  }
  @media (prefers-reduced-motion:reduce){
    *{ animation:none !important; transition:none !important; scroll-behavior:auto !important; }
    .reveal{ opacity:1; transform:none; }
  }