/* 说明类页面（关于 / 联系 / 隐私 / 免责）共用样式
 * 这些页面要能被搜索引擎与广告审核直接抓取，所以不依赖任何 JS 框架。 */
:root {
  --bg: #08080a;
  --panel: #14141a;
  --line: rgba(255, 255, 255, 0.08);
  --text: #f4f4f7;
  --text-2: #9a9aa8;
  --text-3: #5f5f6d;
  --accent: #ff3b5c;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

.wrap { width: 100%; max-width: 1080px; margin: 0 auto; padding: 0 28px; }

/* 顶栏 */
.site-header {
  border-bottom: 1px solid var(--line);
  background: rgba(8, 8, 10, 0.9);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(14px);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 66px;
  gap: 16px;
}
.brand { display: flex; align-items: center; gap: 11px; }
.brand img {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  box-shadow: 0 0 0 1px rgba(255, 214, 150, 0.28), 0 6px 18px rgba(255, 170, 80, 0.16);
}
.brand b { font-size: 16px; letter-spacing: 0.02em; }
.brand span { font-size: 11px; color: var(--text-3); letter-spacing: 0.18em; }
.back {
  font-size: 13.5px;
  color: var(--text-2);
  padding: 7px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  transition: color 0.16s, border-color 0.16s;
}
.back:hover { color: var(--text); border-color: rgba(255, 255, 255, 0.24); }

/* 正文 */
main { padding: 54px 0 70px; }
.doc { max-width: 760px; }
.doc h1 {
  font-size: 30px;
  line-height: 1.35;
  margin: 0 0 10px;
  letter-spacing: -0.01em;
}
.doc .lede {
  font-size: 14px;
  color: var(--text-3);
  margin: 0 0 38px;
  padding-bottom: 26px;
  border-bottom: 1px solid var(--line);
}
.doc h2 {
  font-size: 17px;
  margin: 38px 0 12px;
  letter-spacing: 0.01em;
}
.doc h2:first-of-type { margin-top: 0; }
.doc p, .doc li {
  font-size: 14.5px;
  line-height: 1.95;
  color: #c8c8d2;
  margin: 0 0 13px;
}
.doc ul { padding-left: 20px; margin: 0 0 16px; }
.doc li { margin-bottom: 8px; }
.doc strong { color: #fff; font-weight: 600; }
.doc code {
  font-family: ui-monospace, Menlo, Consolas, monospace;
  font-size: 12.8px;
  background: rgba(255, 255, 255, 0.06);
  padding: 2px 6px;
  border-radius: 5px;
}
.doc a.inline { color: #ffb4a0; border-bottom: 1px solid rgba(255, 180, 160, 0.3); }
.doc a.inline:hover { border-bottom-color: #ffb4a0; }

.note {
  border: 1px solid var(--line);
  border-left: 2px solid var(--accent);
  background: var(--panel);
  border-radius: 10px;
  padding: 15px 18px;
  margin: 22px 0;
}
.note p { margin: 0; font-size: 13.5px; color: #b8b8c4; }

.card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 26px 0 8px;
}
.card {
  border: 1px solid var(--line);
  background: var(--panel);
  border-radius: 12px;
  padding: 18px 20px;
}
.card h3 { font-size: 14px; margin: 0 0 7px; }
.card p { font-size: 13px; color: var(--text-2); margin: 0; line-height: 1.8; }

/* 页脚 */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 26px 0 34px;
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  align-items: center;
  justify-content: space-between;
  font-size: 12.5px;
  color: var(--text-3);
}
.footer-links { display: flex; flex-wrap: wrap; gap: 18px; }
.footer-links a:hover { color: var(--text-2); }

@media (max-width: 720px) {
  .wrap { padding: 0 20px; }
  main { padding: 38px 0 52px; }
  .doc h1 { font-size: 24px; }
  .card-grid { grid-template-columns: 1fr; }
  .header-inner { height: 60px; }
}