@import url("https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@400;500;600;700&family=Noto+Serif+SC:wght@500;600;700&display=swap");

:root {
  color-scheme: dark;
  font-family: "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  color: #eee7da;
  background: #080a0b;
  --surface: #111517;
  --line: #2b3032;
  --muted: #a5a39d;
  --mint: #69d8b5;
  --blue: #6f8cff;
  --gold: #d7b777;
  --serif: "Noto Serif SC", "Songti SC", serif;
}

* { box-sizing: border-box; }
html { background: #080a0b; scroll-behavior: smooth; }
body { min-width: 320px; min-height: 100vh; margin: 0; color: #eee7da; background: radial-gradient(circle at 78% 12%, rgba(92,124,250,.08), transparent 28%), #080a0b; }
a { color: inherit; }
.card-link { display: block; text-decoration: none; transition: border-color .18s ease, transform .18s ease; }
.card-link:hover, .card-link:focus-visible { border-color: rgba(105,216,181,.48); transform: translateY(-2px); }
.shell { width: min(1080px, calc(100% - 40px)); margin: 0 auto; }
.topbar { min-height: 78px; display: flex; align-items: center; justify-content: space-between; gap: 24px; border-bottom: 1px solid rgba(215,183,119,.13); }
.brand { display: inline-flex; align-items: center; gap: 12px; color: #f2e9da; text-decoration: none; font-family: var(--serif); font-size: 24px; font-weight: 600; }
.brand img { width: 56px; height: 42px; object-fit: contain; }
.topnav { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 20px; }
.topnav a { color: #aaa8a2; text-decoration: none; font-size: 14px; }
.topnav a:hover, .topnav a[aria-current="page"] { color: var(--mint); }
.hero { padding: 88px 0 58px; max-width: 850px; }
.eyebrow { margin: 0 0 16px; color: var(--mint); font-size: 12px; font-weight: 700; letter-spacing: .2em; }
h1, h2, h3 { font-family: var(--serif); font-weight: 600; }
h1 { max-width: 840px; margin: 0; color: #f1e6d5; font-size: clamp(40px, 7vw, 68px); line-height: 1.18; letter-spacing: .01em; }
.hero > p:not(.eyebrow) { max-width: 720px; margin: 24px 0 0; color: #b5b1a8; font-size: 18px; line-height: 1.9; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.button { min-height: 46px; padding: 0 22px; border: 1px solid var(--line); border-radius: 11px; display: inline-flex; align-items: center; justify-content: center; color: #ddd7cc; text-decoration: none; font-weight: 600; }
.button.primary { color: #07100e; border-color: var(--mint); background: var(--mint); }
.notice { margin: 0 0 50px; padding: 18px 20px; border: 1px solid rgba(105,216,181,.24); border-radius: 14px; color: #aeb4b0; background: rgba(105,216,181,.055); line-height: 1.75; }
.notice strong { color: var(--mint); }
.notice a { color: var(--mint); }
.section { padding: 42px 0; border-top: 1px solid var(--line); }
.section-heading { max-width: 720px; margin-bottom: 26px; }
.section-heading span { color: var(--gold); font-size: 11px; font-weight: 700; letter-spacing: .16em; }
.section-heading h2 { margin: 9px 0 10px; color: #eae0d1; font-size: clamp(28px, 4vw, 40px); }
.section-heading p { margin: 0; color: var(--muted); line-height: 1.8; }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.card { padding: 24px; border: 1px solid var(--line); border-radius: 15px; background: linear-gradient(145deg, rgba(18,22,24,.95), rgba(12,15,16,.96)); }
.card .tag { color: var(--mint); font-size: 11px; font-weight: 700; letter-spacing: .1em; }
.card h2, .card h3 { margin: 11px 0 10px; color: #e8ded0; font-size: 22px; }
.card p { margin: 0; color: var(--muted); line-height: 1.8; }
.prose { max-width: 800px; }
.prose h2 { margin: 42px 0 12px; color: #eadfce; font-size: 28px; }
.prose h2:first-child { margin-top: 0; }
.prose h3 { margin: 28px 0 9px; color: #dfd7ca; font-size: 20px; }
.prose p, .prose li { color: #aaa8a1; line-height: 1.9; }
.prose ul, .prose ol { padding-left: 1.25rem; }
.steps { counter-reset: step; display: grid; gap: 14px; }
.step { position: relative; padding: 24px 24px 24px 72px; border: 1px solid var(--line); border-radius: 15px; background: var(--surface); }
.step::before { counter-increment: step; content: counter(step); position: absolute; top: 24px; left: 24px; width: 30px; height: 30px; border: 1px solid rgba(105,216,181,.4); border-radius: 50%; display: grid; place-items: center; color: var(--mint); font-weight: 700; }
.step h2 { margin: 0 0 8px; font-size: 21px; }
.step p { margin: 0; color: var(--muted); line-height: 1.8; }
.cta { margin: 54px 0 70px; padding: 32px; border: 1px solid rgba(105,216,181,.24); border-radius: 16px; display: flex; align-items: center; justify-content: space-between; gap: 24px; background: linear-gradient(100deg, rgba(105,216,181,.08), rgba(92,124,250,.05)); }
.cta h2 { margin: 0 0 8px; font-size: 28px; }
.cta p { margin: 0; color: var(--muted); }
.footer { min-height: 76px; padding: 20px 0; border-top: 1px solid var(--line); display: flex; align-items: center; justify-content: space-between; gap: 18px; color: #747a77; font-size: 12px; }
.footer nav { display: flex; flex-wrap: wrap; gap: 15px; }
.footer a { color: #8b908d; text-decoration: none; }
.footer a:hover { color: var(--mint); }

@media (max-width: 760px) {
  .shell { width: min(100% - 26px, 1080px); }
  .topbar { padding: 13px 0; align-items: flex-start; }
  .brand { font-size: 20px; }
  .brand img { width: 46px; height: 34px; }
  .topnav { gap: 9px 14px; }
  .hero { padding: 58px 0 42px; }
  .hero > p:not(.eyebrow) { font-size: 16px; }
  .grid { grid-template-columns: 1fr; }
  .cta { align-items: flex-start; flex-direction: column; }
  .footer { align-items: flex-start; flex-direction: column; }
}