:root {
  color-scheme: light dark;
  --bg: #f6f7f9;
  --surface: #ffffff;
  --text: #111318;
  --muted: #626773;
  --line: #e2e5ea;
  --blue: #0878f9;
  --shadow: 0 18px 50px rgba(14, 26, 48, .10);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: linear-gradient(180deg, #edf5ff 0, var(--bg) 420px);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", "Segoe UI", sans-serif;
  line-height: 1.72;
}
a { color: var(--blue); text-underline-offset: .18em; }
a:focus-visible { outline: 3px solid var(--blue); outline-offset: 3px; }
main { width: min(920px, calc(100% - 32px)); margin: 0 auto; padding: 38px 0 64px; }
.topbar { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 34px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-weight: 700; }
.mini-icon { width: 34px; height: 34px; border-radius: 8px; box-shadow: 0 5px 16px rgba(14, 26, 48, .16); }
.language { display: flex; gap: 6px; font-size: .86rem; }
.language a { padding: 5px 9px; border-radius: 999px; background: rgba(255,255,255,.72); text-decoration: none; }
.hero { display: grid; grid-template-columns: 132px 1fr; align-items: center; gap: 28px; padding: 28px; background: rgba(255,255,255,.82); border: 1px solid rgba(255,255,255,.9); border-radius: 28px; box-shadow: var(--shadow); backdrop-filter: blur(18px); }
.icon { width: 132px; height: 132px; border-radius: 29px; box-shadow: 0 16px 36px rgba(14, 26, 48, .18); }
h1 { margin: 0 0 5px; font-size: clamp(1.9rem, 5vw, 2.7rem); letter-spacing: -.035em; }
h2 { margin: 0 0 10px; font-size: 1.15rem; }
.lead { margin: 0; color: var(--muted); font-size: 1.04rem; }
.eyebrow { margin: 0 0 6px; color: var(--blue); font-size: .82rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 18px; }
.card { padding: 21px; background: var(--surface); border: 1px solid var(--line); border-radius: 20px; }
.card p { margin: 0; color: var(--muted); }
.section { margin-top: 34px; scroll-margin-top: 18px; }
.section > h2 { font-size: 1.35rem; }
.detail { padding: 26px; background: var(--surface); border: 1px solid var(--line); border-radius: 22px; }
.detail h2:not(:first-child) { margin-top: 27px; }
.detail p, .detail li { color: var(--muted); }
.detail strong { color: var(--text); }
.links { display: flex; justify-content: center; gap: 8px; flex-wrap: wrap; margin-top: 24px; }
.links a { display: inline-flex; min-height: 44px; align-items: center; padding: 8px 12px; border-radius: 12px; background: var(--surface); border: 1px solid var(--line); text-decoration: none; }
.notice { padding: 15px 17px; border-left: 4px solid var(--blue); background: rgba(8,120,249,.08); border-radius: 12px; }
footer { padding-top: 34px; color: var(--muted); text-align: center; font-size: .82rem; }
ul { padding-left: 1.3rem; }
@media (max-width: 720px) {
  .grid { grid-template-columns: 1fr; }
  .hero { grid-template-columns: 82px 1fr; padding: 20px; gap: 17px; }
  .icon { width: 82px; height: 82px; border-radius: 19px; }
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #090b0f; --surface: #15181e; --text: #f5f7fa; --muted: #aab0bc; --line: #292e38; --shadow: 0 18px 50px rgba(0,0,0,.35); }
  body { background: radial-gradient(circle at 50% -10%, #123862 0, var(--bg) 440px); }
  .hero, .language a { background: rgba(21,24,30,.86); border-color: #29313c; }
}