:root {
  --bg: #f6f8fb;
  --surface: #ffffff;
  --text: #1c2530;
  --muted: #5a6a7b;
  --primary: #0f6fff;
  --primary-dark: #0a56c9;
  --line: #dbe3ee;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
  width: min(1080px, 92vw);
  margin: 0 auto;
}

.hero, .subhero {
  color: #fff;
  background: linear-gradient(130deg, #0a2250, #0f6fff 60%, #35a1ff);
  padding: 72px 0 64px;
}

.tag {
  display: inline-block;
  margin: 0 0 10px;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.2);
  font-size: 12px;
}

h1 {
  margin: 0 0 14px;
  font-size: clamp(30px, 5vw, 48px);
  line-height: 1.2;
}

.subtitle {
  margin: 0;
  max-width: 760px;
  color: rgba(255, 255, 255, 0.92);
  font-size: 18px;
}

.actions { margin-top: 28px; display: flex; gap: 12px; flex-wrap: wrap; }

.btn {
  display: inline-block;
  padding: 10px 18px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.45);
  color: #fff;
}

.btn.primary {
  border-color: var(--primary);
  background: var(--primary);
}

.btn.primary:hover { background: var(--primary-dark); text-decoration: none; }

.section { padding: 56px 0; }
.section.light { background: #edf3fb; }

h2 {
  margin: 0 0 18px;
  font-size: clamp(24px, 3vw, 32px);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 18px;
}

.card h3 { margin: 0 0 8px; font-size: 20px; }
.card p { margin: 0; color: var(--muted); }

.list {
  margin: 0;
  padding-left: 22px;
}
.list li { margin-bottom: 8px; }

.split {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 20px;
}

.notice {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px;
}

.notice h3 { margin-top: 0; }

.footer {
  padding: 20px 0 30px;
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.footer .container {
  display: flex;
  justify-content: space-between;
  gap: 8px 16px;
  flex-wrap: wrap;
}

.prose {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 28px;
}

.prose h2 { margin-top: 26px; }
.prose h2:first-child { margin-top: 0; }
.prose ul, .prose ol { padding-left: 22px; }
.prose .meta { color: var(--muted); font-size: 14px; }

@media (max-width: 860px) {
  .split { grid-template-columns: 1fr; }
}