:root {
  --bg: #ffffff;
  --text: #16161a;
  --muted: #5d5d66;
  --line: #e6e6ea;
  --brand: #ff6b3d;
  --card: #f6f6f8;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111114;
    --text: #f2f2f5;
    --muted: #a3a3ad;
    --line: #2a2a31;
    --card: #1b1b20;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
.wrap { max-width: 760px; margin: 0 auto; padding: 0 20px; }
header { border-bottom: 1px solid var(--line); }
header .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 16px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 20px; color: var(--text); text-decoration: none; }
.logo img { width: 32px; height: 32px; border-radius: 8px; }
nav a { color: var(--muted); text-decoration: none; margin-left: 16px; font-size: 15px; }
nav a:hover { color: var(--text); }
main { padding: 40px 0 64px; }
h1 { font-size: 34px; line-height: 1.2; margin: 0 0 8px; }
h2 { font-size: 22px; margin: 36px 0 8px; }
h3 { font-size: 18px; margin: 24px 0 4px; }
p, li { color: var(--text); }
.muted { color: var(--muted); }
a { color: var(--brand); }
ul { padding-left: 22px; }
.hero { text-align: center; padding: 32px 0 8px; }
.hero img { width: 120px; height: 120px; border-radius: 28px; box-shadow: 0 10px 30px rgba(0,0,0,0.18); }
.hero h1 { font-size: 40px; margin-top: 20px; }
.hero p { font-size: 19px; color: var(--muted); max-width: 560px; margin: 8px auto 0; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 14px; margin-top: 36px; }
.card { background: var(--card); border-radius: 14px; padding: 18px; }
.card b { display: block; margin-bottom: 4px; }
.card span { color: var(--muted); font-size: 15px; }
.box { background: var(--card); border-radius: 14px; padding: 18px 20px; margin: 20px 0; }
footer { border-top: 1px solid var(--line); padding: 24px 0 40px; color: var(--muted); font-size: 14px; }
footer a { color: var(--muted); margin-right: 16px; }