/* SEO+GEO CMS 全局样式 - 响应式适配手机/电脑 */
:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --accent: #f59e0b;
  --bg: #f8fafc;
  --card: #ffffff;
  --text: #1e293b;
  --muted: #64748b;
  --border: #e2e8f0;
  --success: #16a34a;
  --danger: #dc2626;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(0,0,0,.08);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container { max-width: 1200px; margin: 0 auto; padding: 0 16px; }

/* ===== 站点前台样式 ===== */
.site-header {
  background: #fff;
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 100;
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 60px;
}
.brand { display: flex; align-items: center; gap: 8px; text-decoration: none; color: var(--text); font-weight: 700; font-size: 18px; }
.brand-logo { height: 32px; }
.site-nav { display: flex; gap: 20px; align-items: center; }
.site-nav a { text-decoration: none; color: var(--muted); font-size: 15px; transition: color .2s; }
.site-nav a:hover { color: var(--primary); }
.nav-toggle { display: none; background: none; border: none; font-size: 24px; cursor: pointer; color: var(--text); }

.hero {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff; padding: 48px 24px; border-radius: var(--radius); margin: 24px 0;
  text-align: center;
}
.hero h1 { font-size: 32px; margin-bottom: 12px; }
.hero p { opacity: .9; font-size: 16px; }

.section { margin: 32px 0; }
.section-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }
.section-head h2 { font-size: 22px; }
.section-head a { color: var(--primary); text-decoration: none; font-size: 14px; }
.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px; box-shadow: var(--shadow); transition: transform .2s, box-shadow .2s;
}
.card:hover { transform: translateY(-3px); box-shadow: 0 6px 16px rgba(0,0,0,.1); }
.card-cat { display: inline-block; background: #eff6ff; color: var(--primary); padding: 2px 10px; border-radius: 20px; font-size: 12px; margin-bottom: 10px; }
.card h3 { font-size: 16px; margin-bottom: 8px; }
.card h3 a { color: var(--text); text-decoration: none; }
.card h3 a:hover { color: var(--primary); }
.card-desc { color: var(--muted); font-size: 14px; margin-bottom: 10px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.card-meta { color: var(--muted); font-size: 12px; }

.page-title { margin: 24px 0; font-size: 26px; }
.article-list { list-style: none; background: var(--card); border-radius: var(--radius); border: 1px solid var(--border); }
.article-list li { padding: 16px 20px; border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; }
.article-list li:last-child { border-bottom: none; }
.article-list a { color: var(--text); text-decoration: none; font-size: 15px; }
.article-list a:hover { color: var(--primary); }
.list-date { color: var(--muted); font-size: 13px; white-space: nowrap; margin-left: 12px; }

.article-detail {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 32px; margin: 24px 0;
}
.article-detail h1 { font-size: 28px; margin-bottom: 12px; }
.article-meta { color: var(--muted); font-size: 13px; margin-bottom: 24px; padding-bottom: 16px; border-bottom: 1px solid var(--border); }
.article-body { font-size: 16px; }
.article-body h2 { font-size: 20px; margin: 24px 0 12px; color: var(--primary-dark); }
.article-body h3 { font-size: 18px; margin: 20px 0 10px; }
.article-body p { margin-bottom: 14px; }
.article-body ul, .article-body ol { margin: 0 0 14px 20px; }
.article-body blockquote { border-left: 4px solid var(--accent); padding: 8px 16px; background: #fffbeb; margin: 14px 0; color: #92400e; }
.article-body a { color: var(--primary); }
.article-body pre { background: #0f172a; color: #e2e8f0; padding: 16px; border-radius: 8px; overflow-x: auto; font-size: 13px; margin-bottom: 14px; }

.faq { margin: 24px 0; }
.faq h2 { margin-bottom: 12px; font-size: 20px; }
.faq details { background: var(--card); border: 1px solid var(--border); border-radius: 8px; margin-bottom: 8px; padding: 12px 16px; }
.faq summary { cursor: pointer; font-weight: 600; }
.faq p { margin-top: 8px; color: var(--muted); font-size: 15px; }

.site-footer { background: #0f172a; color: #94a3b8; padding: 24px 0; margin-top: 48px; text-align: center; font-size: 14px; }
.site-footer a { color: #60a5fa; text-decoration: none; }

.search-form { display: flex; gap: 8px; margin: 20px 0; max-width: 480px; }
.search-form input {
  flex: 1; padding: 10px 14px; border: 1px solid var(--border); border-radius: 8px;
  font-size: 15px; outline: none;
}
.search-form input:focus { border-color: var(--primary); }
.search-form button {
  padding: 10px 20px; background: var(--primary); color: #fff; border: none;
  border-radius: 8px; cursor: pointer; font-size: 14px;
}
.search-form button:hover { background: var(--primary-dark); }
.empty { color: var(--muted); text-align: center; padding: 30px; }

/* ===== 手机端适配 ===== */
@media (max-width: 768px) {
  .card-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 24px; }
  .hero { padding: 32px 16px; }
  .site-nav {
    position: absolute; top: 60px; left: 0; right: 0;
    background: #fff; flex-direction: column; gap: 0;
    padding: 0; max-height: 0; overflow: hidden; transition: max-height .3s;
    border-bottom: 1px solid var(--border);
  }
  .site-nav.open { max-height: 300px; }
  .site-nav a { padding: 14px 16px; width: 100%; border-top: 1px solid var(--border); }
  .nav-toggle { display: block; }
  .article-detail { padding: 20px; }
  .article-detail h1 { font-size: 22px; }
  .article-list li { flex-direction: column; align-items: flex-start; gap: 4px; }
  .list-date { margin-left: 0; }
}