:root {
  --bg: #f6f8fb;
  --card: #ffffff;
  --text: #111827;
  --muted: #4b5563;
  --brand: #0f766e;
  --brand-2: #0ea5e9;
  --line: #e5e7eb;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: radial-gradient(circle at 10% 10%, #dff7ff 0%, transparent 40%),
    radial-gradient(circle at 90% 0%, #d1fae5 0%, transparent 45%),
    var(--bg);
}
.container { width: min(1080px, 92%); margin: 0 auto; }
header { padding: 24px 0 10px; }
.brand { font-size: 26px; font-weight: 800; letter-spacing: 0.5px; }
.hero {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 24px;
  align-items: center;
  padding: 24px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: 0 20px 40px rgba(2, 6, 23, 0.06);
}
.hero h1 { margin: 0 0 12px; font-size: 36px; line-height: 1.2; }
.hero p { margin: 0 0 18px; color: var(--muted); }
.btns { display: flex; gap: 12px; flex-wrap: wrap; }
.btn {
  display: inline-block;
  padding: 12px 18px;
  border-radius: 12px;
  text-decoration: none;
  font-weight: 700;
}
.btn.primary { background: linear-gradient(120deg, var(--brand), var(--brand-2)); color: #fff; }
.btn.ghost { border: 1px solid var(--line); color: var(--text); background: #fff; }
main section {
  margin-top: 18px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 20px;
}
h2 { margin-top: 0; font-size: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.card {
  border: 1px solid var(--line);
  background: #fcfdff;
  border-radius: 12px;
  padding: 14px;
}
.meta-list, .friend-links { display: flex; flex-wrap: wrap; gap: 8px; }
.meta-list a, .friend-links a {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 10px;
  text-decoration: none;
  color: #1f2937;
  background: #fff;
}
.faq dt { font-weight: 700; margin-top: 12px; }
.faq dd { margin: 6px 0 0 0; color: var(--muted); }
footer {
  color: var(--muted);
  padding: 28px 0 40px;
  text-align: center;
  font-size: 14px;
}
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; }
  .hero h1 { font-size: 30px; }
  .grid-3 { grid-template-columns: 1fr; }
}