/* 安防技术分享 — 编辑风格 · 移动端优先
   配色：纸白底 / 松墨绿主色 / 琥珀点缀 */
:root {
  --bg: #f7f6f1;
  --paper: #ffffff;
  --ink: #1c2321;
  --ink-2: #4b5653;
  --ink-3: #7d8885;
  --line: #e3e1d8;
  --primary: #0e5a4a;
  --primary-soft: #e2ede9;
  --accent: #b45309;
  --radius: 10px;
  --serif: 'Noto Serif SC', 'Songti SC', 'STSong', 'SimSun', serif;
  --sans: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --mono: 'JetBrains Mono', Consolas, monospace;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 16px;
  line-height: 1.85;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
}
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--accent); }
img { max-width: 100%; height: auto; }

/* ---------- 头部 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(247, 246, 241, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.header-in {
  max-width: 72rem; margin: 0 auto; padding: 0 1rem;
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; min-height: 3.25rem;
}
.brand { display: flex; align-items: center; gap: .5rem; font-weight: 700; font-size: 1.05rem; color: var(--ink); letter-spacing: .02em; flex: none; white-space: nowrap; }
.brand:hover { color: var(--ink); }
.brand-mark {
  width: 1.4rem; height: 1.4rem; flex: none;
  border: 2px solid var(--primary); border-radius: 50%;
  position: relative;
}
.brand-mark::after {
  content: ''; position: absolute; inset: .32rem;
  background: var(--primary); border-radius: 50%;
}
.site-nav { display: flex; gap: 1.1rem; font-family: var(--sans); font-size: .85rem; flex-wrap: wrap; row-gap: .2rem; padding-bottom: .35rem; }
.site-nav a { color: var(--ink-2); padding: .3rem 0; border-bottom: 2px solid transparent; white-space: nowrap; }
.site-nav a:hover { color: var(--primary); border-bottom-color: var(--primary); }
.site-nav a.on { color: var(--primary); border-bottom-color: var(--primary); }

/* ---------- 主体 ---------- */
.wrap { max-width: 46rem; margin: 0 auto; padding: 1.25rem 1rem 3rem; }
.wrap.wide { max-width: 72rem; }

.hero { padding: 1.5rem 0 1.75rem; border-bottom: 2px solid var(--ink); margin-bottom: 1.5rem; }
.hero h1 { font-size: 1.7rem; line-height: 1.3; letter-spacing: .01em; }
.hero p { color: var(--ink-2); font-family: var(--sans); font-size: .9rem; margin-top: .6rem; }
.hero .tags { margin-top: .8rem; display: flex; flex-wrap: wrap; gap: .4rem; }
.hero .tags span {
  font-family: var(--sans); font-size: .75rem; color: var(--primary);
  background: var(--primary-soft); border-radius: 999px; padding: .15rem .7rem;
}

/* ---------- 文章卡片 ---------- */
.post-list { display: grid; gap: 1rem; }
.post-card {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.1rem 1.15rem; display: block; color: var(--ink);
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.post-card:hover { color: var(--ink); transform: translateY(-2px); border-color: var(--primary); box-shadow: 0 8px 24px -12px rgba(14, 90, 74, .25); }
.post-card .meta { font-family: var(--sans); font-size: .75rem; color: var(--ink-3); display: flex; align-items: center; gap: .6rem; }
.post-card .cat { color: var(--primary); font-weight: 600; }
.post-card h2 { font-size: 1.12rem; line-height: 1.5; margin: .45rem 0 .35rem; }
.post-card .desc { color: var(--ink-2); font-size: .9rem; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.post-card .more { font-family: var(--sans); font-size: .8rem; color: var(--accent); margin-top: .5rem; display: inline-block; }

/* ---------- 分类区块标题 ---------- */
.section-head { display: flex; align-items: baseline; justify-content: space-between; margin: 1.75rem 0 .9rem; }
.section-head h2 { font-size: 1.15rem; padding-left: .6rem; border-left: 4px solid var(--primary); }
.section-head a { font-family: var(--sans); font-size: .8rem; }

/* ---------- 分页 ---------- */
.pager { display: flex; justify-content: center; align-items: center; gap: .4rem; margin-top: 2rem; font-family: var(--sans); font-size: .85rem; }
.pager a, .pager span {
  min-width: 2.2rem; height: 2.2rem; display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid var(--line); border-radius: 8px; background: var(--paper); color: var(--ink-2); padding: 0 .5rem;
}
.pager a:hover { border-color: var(--primary); color: var(--primary); }
.pager .cur { background: var(--primary); border-color: var(--primary); color: #fff; }

/* ---------- 文章详情 ---------- */
.article-head h1 { font-size: 1.55rem; line-height: 1.45; }
.article-meta { font-family: var(--sans); font-size: .8rem; color: var(--ink-3); margin: .8rem 0 1.2rem; display: flex; flex-wrap: wrap; gap: .8rem; }
.article-meta a { color: var(--primary); }
.breadcrumb { font-family: var(--sans); font-size: .78rem; color: var(--ink-3); margin-bottom: 1rem; }
.breadcrumb a { color: var(--ink-2); }
.article-body { font-size: 1rem; }
.article-body > p { margin: 1rem 0; }
.article-body h2 {
  font-size: 1.22rem; margin: 2rem 0 .9rem; padding-bottom: .4rem;
  border-bottom: 1px solid var(--line);
}
.article-body h3 { font-size: 1.05rem; margin: 1.5rem 0 .6rem; }
.article-body p, .article-body li { color: var(--ink); }
.article-body ul, .article-body ol { padding-left: 1.4rem; margin: .8rem 0; }
.article-body li { margin: .3rem 0; }
.article-body strong { color: var(--primary); }
.article-body blockquote {
  margin: 1.2rem 0; padding: .8rem 1rem; background: var(--primary-soft);
  border-left: 4px solid var(--primary); border-radius: 0 8px 8px 0; font-family: var(--sans); font-size: .92rem;
}
.article-body blockquote p { margin: 0; }
.article-body table {
  width: 100%; border-collapse: collapse; margin: 1.2rem 0;
  font-family: var(--sans); font-size: .85rem; display: block; overflow-x: auto;
}
.article-body th, .article-body td { border: 1px solid var(--line); padding: .5rem .65rem; text-align: left; }
.article-body th { background: var(--primary-soft); color: var(--ink); font-weight: 600; white-space: nowrap; }
.article-body code { font-family: var(--mono); font-size: .85em; background: #eceade; padding: .1em .35em; border-radius: 4px; }
.article-body pre { background: #14201c; color: #d8e6e1; padding: 1rem; border-radius: 8px; overflow-x: auto; margin: 1.2rem 0; }
.article-body pre code { background: none; padding: 0; color: inherit; font-size: .82rem; line-height: 1.7; }
.article-body hr { border: none; border-top: 1px dashed var(--line); margin: 2rem 0; }

.toc {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
  padding: .9rem 1rem; margin: 1.2rem 0 1.5rem; font-family: var(--sans); font-size: .85rem;
}
.toc .toc-title { font-weight: 700; color: var(--ink-2); margin-bottom: .4rem; }
.toc ol { padding-left: 1.2rem; margin: 0; }
.toc li { margin: .2rem 0; }

.tags-row { display: flex; flex-wrap: wrap; gap: .45rem; margin: 1.6rem 0; font-family: var(--sans); font-size: .78rem; }
.tags-row a { background: var(--paper); border: 1px solid var(--line); border-radius: 999px; padding: .15rem .75rem; color: var(--ink-2); }
.tags-row a:hover { border-color: var(--primary); color: var(--primary); }

.prevnext { display: grid; gap: .7rem; margin-top: 1.5rem; font-family: var(--sans); font-size: .85rem; }
.prevnext a { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: .7rem .9rem; color: var(--ink); }
.prevnext a:hover { border-color: var(--primary); color: var(--primary); }
.prevnext .label { color: var(--ink-3); font-size: .75rem; display: block; }

.related { margin-top: 2rem; }

/* ---------- 页脚 ---------- */
.site-footer {
  border-top: 2px solid var(--ink); margin-top: 3rem; padding: 1.5rem 1rem 2.5rem;
  font-family: var(--sans); font-size: .8rem; color: var(--ink-3);
}
.footer-in { max-width: 72rem; margin: 0 auto; display: grid; gap: .8rem; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 1rem; }
.site-footer a { color: var(--ink-2); }

/* ---------- 桌面 ---------- */
@media (min-width: 48rem) {
  body { font-size: 17px; }
  .wrap { padding-top: 2rem; }
  .hero { padding: 2.5rem 0 2rem; }
  .hero h1 { font-size: 2.1rem; }
  .post-list { grid-template-columns: 1fr 1fr; gap: 1.1rem; }
  .post-list.single { grid-template-columns: 1fr; }
  .article-head h1 { font-size: 1.9rem; }
  .prevnext { grid-template-columns: 1fr 1fr; }
  .footer-in { grid-template-columns: 2fr 1fr; align-items: start; }
}