:root {
  --bg: #ffffff; --soft: #f4f2fb; --ink: #14112b; --muted: #5d5a73; --line: #e6e3f0;
  --brand: #5a2dff; --brand-ink: #3d17d6;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0e0d14; --soft: #1a1826; --ink: #f4f2ff; --muted: #a8a4bf; --line: #2a2738; --brand: #8b6bff; --brand-ink: #b7a4ff; }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
.wrap { max-width: 720px; margin: 0 auto; padding: 24px 16px 64px; }
header { display: flex; align-items: center; gap: 12px; padding-bottom: 20px; border-bottom: 1px solid var(--line); margin-bottom: 28px; }
header img { width: 40px; height: 40px; border-radius: 10px; }
header a { color: var(--ink); text-decoration: none; font-weight: 800; font-size: 20px; letter-spacing: -0.4px; }
header nav { margin-left: auto; display: flex; gap: 16px; font-size: 15px; flex-wrap: wrap; justify-content: flex-end; }
header nav a { font-weight: 600; font-size: 15px; color: var(--muted); }
h1 { font-size: 34px; line-height: 1.15; letter-spacing: -1px; margin: 0 0 8px; }
h2 { font-size: 21px; letter-spacing: -0.3px; margin: 36px 0 8px; }
p, li { color: var(--ink); }
.muted { color: var(--muted); }
a { color: var(--brand-ink); }
ul { padding-left: 22px; }
li { margin: 6px 0; }
.box { background: var(--soft); border-radius: 16px; padding: 18px 20px; margin: 20px 0; }
.hero { text-align: center; padding: 40px 0 8px; }
.hero img { width: 112px; height: 112px; border-radius: 26px; box-shadow: 0 12px 40px rgba(90, 45, 255, 0.35); }
.hero h1 { font-size: 44px; margin-top: 20px; }
.hero p { font-size: 19px; color: var(--muted); max-width: 520px; margin: 8px auto 0; }
.feats { display: grid; gap: 12px; margin-top: 36px; }
.feat { background: var(--soft); border-radius: 16px; padding: 16px 18px; }
.feat b { display: block; font-size: 17px; }
.feat span { color: var(--muted); font-size: 15.5px; }
footer { margin-top: 56px; padding-top: 20px; border-top: 1px solid var(--line); font-size: 14px; color: var(--muted); display: flex; gap: 16px; flex-wrap: wrap; }
footer a { color: var(--muted); }
@media (max-width: 520px) { header nav { gap: 12px; } h1 { font-size: 28px; } .hero h1 { font-size: 36px; } }