:root{
  --bg: #0b0d12;
  --fg: rgba(255,255,255,.92);
  --muted: rgba(255,255,255,.66);
  --soft: rgba(255,255,255,.10);
  --soft-2: rgba(255,255,255,.06);

  /* 强调色（你给的 OKLCH） */
  --brand: oklch(76.9% 0.188 70.08);

  /* 用 color-mix 做一点层次，保持大气克制 */
  --brand-1: color-mix(in oklch, var(--brand) 92%, white);
  --brand-2: color-mix(in oklch, var(--brand) 70%, #22d3ee);

  --radius: 18px;
  --container: 1120px;

  --shadow: 0 20px 60px rgba(0,0,0,.45);
}

:root[data-theme="light"]{
  --bg: #ffffff;
  --fg: rgba(15,23,42,.92);
  --muted: rgba(15,23,42,.62);
  --soft: rgba(15,23,42,.10);
  --soft-2: rgba(15,23,42,.06);
  --shadow: 0 20px 60px rgba(15,23,42,.10);
}

*{ box-sizing: border-box; }
html,body{ height: 100%; }
body{
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, "Noto Sans", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a{ color: inherit; text-decoration: none; -webkit-tap-highlight-color: transparent; }
a:focus{ outline: none; }
a:active{ color: inherit; }

a.link{ color: var(--muted); }
a.link:hover{ color: var(--fg); }
a.link:visited{ color: var(--muted); }
a.link:active{ color: var(--muted); }

.container{
  width: min(var(--container), calc(100% - 48px));
  margin: 0 auto;
}

.skip{
  position: absolute;
  left: -9999px;
  top: 12px;
  padding: 10px 12px;
  border-radius: 10px;
  background: var(--soft);
}
.skip:focus{ left: 12px; }

.topbar{
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(10px);
  background: color-mix(in srgb, var(--bg) 72%, transparent);
  border-bottom: 1px solid var(--soft-2);
}

.topbar-inner{
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand{
  display:flex; gap:10px; align-items:center;
  font-weight: 600;
  letter-spacing: .2px;
}
.dot{
  width: 10px; height: 10px; border-radius: 999px;
  background: linear-gradient(135deg, var(--brand-1), var(--brand-2));
  box-shadow: 0 0 0 6px color-mix(in oklch, var(--brand) 22%, transparent);
}

.nav{
  display:flex;
  gap: 18px;
  color: var(--muted);
}
.nav a{ padding: 8px 10px; border-radius: 10px; }
.nav a:hover{ background: var(--soft-2); color: var(--fg); }

.actions{ display:flex; align-items:center; gap: 10px; }
.icon-btn{
  border: 1px solid var(--soft-2);
  background: transparent;
  color: var(--fg);
  border-radius: 12px;
  width: 40px;
  height: 40px;
  cursor: pointer;
  font-size: 18px;
}
.icon-btn:hover{ background: var(--soft-2); }

.hero{
  position: relative;
  padding: 96px 0 56px;
  overflow: hidden;
}
.kicker{
  margin: 0 0 12px;
  color: var(--muted);
  letter-spacing: .14em;
  text-transform: uppercase;
  font-size: 12px;
}
.headline{
  margin: 0;
  font-size: clamp(40px, 6vw, 68px);
  line-height: 1.1;
  span {
    margin-top: 6px;
  }
}
.gradient{
  display: inline-block;
  background: linear-gradient(135deg, var(--brand-1), var(--brand-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.subhead{
  margin: 18px 0 0;
  max-width: 64ch;
  color: var(--muted);
  font-size: 16px;
}

.hero-cta{
  margin-top: 28px;
  display:flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding: 12px 16px;
  border-radius: 14px;
  border: 1px solid var(--soft-2);
  background: transparent;
  color: var(--fg);
  font-weight: 500;
}
.btn:hover{ background: var(--soft-2); }
.btn.primary{
  border: 0;
  background: var(--brand);
  color: #fff;
  box-shadow: var(--shadow);
}
.btn.primary:hover{ filter: brightness(1.05); }
.btn.ghost{ color: var(--muted); }
.btn.ghost:hover{ color: var(--fg); }

.meta{
  margin-top: 26px;
  display:flex;
  gap: 10px;
  flex-wrap: wrap;
}
.pill{
  padding: 8px 10px;
  border-radius: 999px;
  border: 1px solid var(--soft-2);
  color: var(--muted);
  background: color-mix(in srgb, var(--bg) 80%, transparent);
}

.section{
  padding: 48px 0 100px;
}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 22px;
}
.section-head h2{
  margin: 0;
  font-size: 24px;
  letter-spacing: -0.02em;
}
.section-head p{
  margin: 0;
  max-width: 56ch;
  color: var(--muted);
}

.grid{
  display:grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 14px;
}
.card{
  grid-column: span 4;
  border: 1px solid var(--soft-2);
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: 0 1px 0 var(--soft-2);
}
.card:hover{
  transform: translateY(-2px);
  transition: transform .18s ease, background .18s ease;
  background: color-mix(in srgb, var(--bg) 86%, transparent);
}
.card-top{
  display:flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
}
.card h3{ margin: 0; font-size: 16px; letter-spacing: -0.01em; }
.tag{
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  border:  1px solid var(--soft-2);
  border-radius: 999px;
  padding: 4px 8px;
}
.desc{ margin: 12px 0 0; color: var(--muted); }
.card-actions{
  margin-top: 14px;
  display:flex;
  gap: 14px;
}

.two-col{
  display:grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 26px;
  align-items: start;
}
.lead{ font-size: 16px; color: var(--fg); }
.facts{
  border: 1px solid var(--soft-2);
  border-radius: var(--radius);
  padding: 16px;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
}
.fact + .fact{ margin-top: 14px; padding-top: 14px; border-top: 1px solid var(--soft-2); }
.fact-k{ margin:0; color: var(--muted); font-size: 12px; letter-spacing: .12em; text-transform: uppercase;}
.fact-v{ margin:6px 0 0; }

.contact{
  display:grid;
  gap: 16px;
}
.contact-card{
  border: 1px solid var(--soft-2);
  border-radius: var(--radius);
  padding: 18px;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  display:flex;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}
.contact-label{ margin:0; color: var(--muted); font-size: 12px; letter-spacing: .12em; text-transform: uppercase;}
.contact-value{
  display:inline-block;
  margin-top: 6px;
  font-size: 18px;
  letter-spacing: -0.01em;
}
.contact-links{ display:flex; gap: 14px; flex-wrap: wrap; }

.footer{
  color: var(--muted);
  padding: 24px 0;
}
.footer-inner{
  display:flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  font-size: 14px;
  line-height: 1.8;
  p {
    margin: 0;
  }
}
.icp{ margin: 6px 0 0; }

/* 背景氛围 */
.bg{ position:absolute; inset:0; pointer-events:none; }
.orb{
  position:absolute;
  width: 520px; height: 520px;
  border-radius: 999px;
  filter: blur(44px);
  opacity: .22;
  transform: translate3d(0,0,0);
}
.orb-1{
  left: -220px; top: -180px;
  background: radial-gradient(circle at 30% 30%, var(--brand-1), transparent 62%);
}
.orb-2{
  right: -240px; bottom: -220px;
  background: radial-gradient(circle at 30% 30%, var(--brand-2), transparent 62%);
}

/* Reveal 动效（节制） */
.reveal{
  opacity: 0;
  transform: translateY(10px);
  transition: opacity .6s ease, transform .6s ease;
}
.reveal.show{
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 900px){
  .card{ grid-column: span 6; }
  .two-col{ grid-template-columns: 1fr; }
  .section-head{ flex-direction: column; align-items: flex-start; }
}

@media (max-width: 600px){
  .nav{ display:none; }
  .hero{ padding-top: 76px; }
  .card{ grid-column: span 12; }
}