/* 静态说明页（关于 / 社区规范）共用样式：与主站 index.html 同一套配色 */
:root {
  --page-bg: #f5f7fa;
  --card-bg: #ffffff;
  --line: #e6ecf5;
  --text: #1d2b3f;
  --text-sub: #637083;
  --brand: #1f6feb;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--page-bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Segoe UI', sans-serif;
  font-size: 15px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

.doc-head {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  gap: 10px;
  height: 52px;
  padding: 0 16px;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.doc-back {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  height: 32px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--text-sub);
  font-size: 13px;
  text-decoration: none;
}

.doc-back:hover {
  border-color: #c8d8ef;
  color: var(--brand);
}

.doc-head-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
}

.doc-wrap {
  max-width: 760px;
  margin: 0 auto;
  padding: 20px 16px 48px;
}

.doc-card {
  margin-bottom: 14px;
  padding: 18px 20px;
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: 12px;
}

.doc-card h2 {
  margin: 0 0 10px;
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
}

.doc-card p {
  margin: 0 0 10px;
  color: var(--text-sub);
  font-size: 14px;
}

.doc-card p:last-child {
  margin-bottom: 0;
}

.doc-card .doc-strong {
  color: var(--text);
  font-weight: 600;
}

/* 条款页专用：生效日期行、二级条目（缩进）、页脚互跳链接 */
.doc-meta {
  margin: -4px 0 10px;
  color: #98a2b3;
  font-size: 13px;
}

.doc-card .doc-sub {
  padding-left: 14px;
  color: #7b8794;
  font-size: 13.5px;
}

.doc-inline-link {
  color: var(--brand);
  text-decoration: none;
}

.doc-inline-link:hover {
  text-decoration: underline;
}

.doc-sep {
  margin: 0 6px;
  color: #b3bcc9;
}

.doc-item {
  display: flex;
  gap: 10px;
  padding: 8px 0;
  border-top: 1px dashed var(--line);
  font-size: 14px;
}

.doc-item:first-of-type {
  border-top: 0;
  padding-top: 0;
}

.doc-item-label {
  flex: none;
  width: 76px;
  color: var(--text);
  font-weight: 600;
}

.doc-item-text {
  color: var(--text-sub);
}

.doc-icp {
  margin-top: 18px;
  text-align: center;
  font-size: 12.5px;
  color: #8a94a6;
}

.doc-icp a {
  color: #8a94a6;
  text-decoration: none;
}

.doc-icp a:hover {
  color: var(--brand);
  text-decoration: underline;
}

.doc-mail {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 4px;
  padding: 6px 12px;
  border: 1px solid #cfe0fb;
  border-radius: 8px;
  background: #f3f8ff;
  color: var(--brand);
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
}

.doc-mail:hover {
  background: #e9f2ff;
}

.doc-footer-note {
  margin-top: 16px;
  text-align: center;
  font-size: 12.5px;
  color: #8a94a6;
}

@media (max-width: 480px) {
  body {
    font-size: 14.5px;
  }

  .doc-wrap {
    padding: 14px 12px 40px;
  }

  .doc-card {
    padding: 15px 16px;
    border-radius: 10px;
  }

  .doc-item {
    display: block;
  }

  .doc-item-label {
    width: auto;
    display: block;
    margin-bottom: 2px;
  }
}