:root {
  --text: #17202a;
  --muted: #667085;
  --line: #d9e0e7;
  --primary: #0f766e;
  --primary-dark: #115e59;
  --bg: #eef2f5;
  font-family: "Segoe UI", "Microsoft YaHei", system-ui, sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; color: var(--text); background: var(--bg); }
.site-header {
  height: 66px;
  padding: 0 24px;
  background: rgba(255, 255, 255, .9);
  border-bottom: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand-mark {
  width: 36px; height: 36px; display: grid; place-items: center;
  border-radius: 8px; background: var(--primary); color: #fff; font-weight: 800;
}
.button {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 36px; padding: 8px 14px; border: 1px solid #b8c2cf;
  border-radius: 7px; text-decoration: none; color: var(--text); background: #fff;
}
.button.primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.hero {
  width: min(1180px, calc(100% - 40px));
  margin: 56px auto;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, .9fr);
  gap: 28px;
  align-items: stretch;
}
.hero-copy, .feature-panel {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 34px;
}
.eyebrow { color: var(--primary); font-weight: 700; }
h1 { font-size: 38px; line-height: 1.2; margin: 12px 0; letter-spacing: 0; }
p { color: var(--muted); line-height: 1.8; }
.actions { display: flex; gap: 10px; margin: 24px 0 12px; }
.release-meta { color: var(--muted); }
.feature-panel h2 { font-size: 18px; }
ul { padding-left: 20px; color: var(--muted); line-height: 2.1; }
@media (max-width: 820px) {
  .hero { grid-template-columns: 1fr; margin: 24px auto; }
  h1 { font-size: 28px; }
}