:root {
  color-scheme: light dark;
  --ink: #102142;
  --muted: #5b6b85;
  --paper: #f6f9ff;
  --card: rgba(255,255,255,.88);
  --blue: #0b5fff;
  --navy: #061a40;
  --mint: #4de2c5;
  --lime: #c7ff5e;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at 85% 5%, #dfffea 0, transparent 30%), var(--paper);
  line-height: 1.7;
}
a { color: var(--blue); }
.wrap { width: min(1080px, calc(100% - 40px)); margin: 0 auto; }
header { padding: 28px 0; display: flex; justify-content: space-between; align-items: center; }
.brand { display: flex; align-items: center; gap: 12px; font-weight: 800; color: var(--navy); text-decoration: none; }
.brand img { width: 44px; height: 44px; border-radius: 12px; }
nav { display: flex; gap: 18px; flex-wrap: wrap; }
nav a { color: var(--ink); text-decoration: none; font-size: 14px; }
.hero { padding: 76px 0 56px; display: grid; grid-template-columns: 1.35fr .65fr; gap: 42px; align-items: center; }
.eyebrow { color: var(--blue); font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
h1 { margin: 10px 0 20px; font-size: clamp(40px, 5.4vw, 68px); line-height: 1.08; letter-spacing: -.04em; color: var(--navy); text-wrap: balance; }
h2 { margin-top: 0; color: var(--navy); }
.lead { font-size: 20px; color: var(--muted); max-width: 720px; }
.hero-logo { width: min(100%, 360px); justify-self: center; filter: drop-shadow(0 26px 30px rgba(11,95,255,.22)); }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.button { display: inline-block; padding: 12px 20px; border-radius: 999px; background: var(--blue); color: white; text-decoration: none; font-weight: 700; }
.button.secondary { background: transparent; color: var(--blue); border: 1px solid #9dbaff; }
section { padding: 44px 0; }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card { padding: 24px; border: 1px solid #dce6f7; border-radius: 24px; background: var(--card); box-shadow: 0 14px 40px rgba(16,33,66,.06); }
.card strong { display: block; margin-bottom: 8px; color: var(--navy); }
pre { overflow-x: auto; padding: 18px; border-radius: 18px; background: var(--navy); color: #eaf2ff; }
footer { margin-top: 40px; padding: 34px 0 50px; border-top: 1px solid #dce6f7; color: var(--muted); font-size: 14px; }
.legal { max-width: 820px; padding: 54px 0; }
@media (max-width: 760px) {
  header { align-items: flex-start; gap: 18px; }
  .hero { grid-template-columns: 1fr; padding-top: 40px; }
  .hero-logo { width: 220px; order: -1; }
  .grid { grid-template-columns: 1fr; }
}
@media (prefers-color-scheme: dark) {
  :root { --ink:#edf3ff; --muted:#b8c4d9; --paper:#061226; --card:rgba(12,31,66,.88); --navy:#f2f7ff; }
  body { background: radial-gradient(circle at 85% 5%, #123d43 0, transparent 30%), var(--paper); }
  .card, footer { border-color:#213a65; }
  nav a, .brand { color:var(--ink); }
}