/* 设计规范：简洁、合规、可读 */
:root {
  --bg: #0f172a;
  --card: #111827;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --primary: #3b82f6;
  --secondary: #374151;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "Apple Color Emoji", "Segoe UI Emoji";
  background: linear-gradient(180deg, #0b1022, var(--bg));
  color: var(--text);
}
.container { max-width: 1040px; margin: 0 auto; padding: 0 20px; }

.site-header { position: sticky; top:0; backdrop-filter: saturate(120%) blur(6px); background: rgba(15,23,42,.7); border-bottom: 1px solid rgba(255,255,255,.06); }
.header-inner { display: flex; align-items: center; justify-content: space-between; padding: 14px 0; }
.brand { color: var(--text); text-decoration: none; font-weight: 600; letter-spacing: .2px; }
.nav a { color: var(--muted); text-decoration: none; margin-left: 18px; }
.nav a:hover { color: var(--text); }

.hero { padding: 80px 0 56px; text-align: center; }
.hero h1 { font-size: 34px; margin: 0 0 12px; }
.hero p { color: var(--muted); max-width: 800px; margin: 0 auto 24px; }
.cta { display: flex; gap: 12px; justify-content: center; }
.btn { display: inline-block; padding: 10px 16px; background: var(--primary); color: white; border-radius: 8px; text-decoration: none; }
.btn-secondary { background: var(--secondary); }

.section { padding: 40px 0; }
.section.alt { background: rgba(255,255,255,.02); }
.section h2 { margin: 0 0 20px; font-size: 24px; }

.cards { display: grid; grid-template-columns: repeat(auto-fit,minmax(260px,1fr)); gap: 16px; }
.card { background: var(--card); padding: 18px; border: 1px solid rgba(255,255,255,.06); border-radius: 12px; }
.card h3 { margin: 0 0 10px; font-size: 18px; }
.card p { color: var(--muted); margin: 0 0 10px; }
.card ul { margin: 0; padding-left: 18px; color: var(--muted); }

.features { display: grid; grid-template-columns: repeat(auto-fit,minmax(220px,1fr)); gap: 16px; }
.feature { background: var(--card); padding: 16px; border-radius: 12px; border: 1px solid rgba(255,255,255,.06); }
.feature h4 { margin: 0 0 8px; font-size: 16px; }
.feature p { margin: 0; color: var(--muted); }

.contact-list { margin: 0; padding-left: 18px; color: var(--muted); }

.site-footer { border-top: 1px solid rgba(255,255,255,.06); padding: 18px 0; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; }
#icp-link { color: var(--muted); text-decoration: none; }
#icp-link:hover { color: var(--text); }

.status { background: #1f2937; border: 1px solid rgba(255,255,255,.08); border-radius: 12px; padding: 16px; color: var(--muted); }
.status.hidden { display: none; }