/* ===========================================================
   CMS 通用主题：单套样式 + --accent 强调色变量(每站不同)
   =========================================================== */
:root{
  --accent:#0a2540;
  --ink:#1f2430; --muted:#6b7280; --line:#e8edf3;
  --bg:#fff; --soft:#f6f8fb;
  --radius:12px; --shadow:0 10px 30px rgba(20,30,50,.08);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",Segoe UI,Roboto,sans-serif;color:var(--ink);background:var(--bg);line-height:1.75;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
.wrap{max-width:1100px;margin:0 auto;padding:0 22px}
.narrow{max-width:780px}

/* 按钮 */
.btn{display:inline-flex;align-items:center;gap:8px;font-weight:600;border-radius:9px;padding:13px 28px;font-size:16px;transition:.2s;cursor:pointer;border:2px solid transparent}
.btn.primary{background:var(--accent);color:#fff}
.btn.primary:hover{filter:brightness(.92);transform:translateY(-2px)}
.btn.ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn.ghost:hover{border-color:var(--accent);color:var(--accent)}
.btn.light{background:#fff;color:var(--accent)}
.btn.block{display:block;width:100%;text-align:center}

/* 头部 */
.site-header{background:rgba(255,255,255,.97);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50;backdrop-filter:blur(8px)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:62px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700}
.brand-mark{width:34px;height:34px;border-radius:8px;color:#fff;display:grid;place-items:center;font-weight:800;font-size:20px}
.brand-mark.sm{width:26px;height:26px;font-size:15px;border-radius:6px}
.brand-name{font-size:17px}
.nav{display:flex;align-items:center;gap:24px}
.nav a{font-size:15px;color:var(--ink)}
.nav a:hover{color:var(--accent)}
.nav .dl-btn{background:var(--accent);color:#fff;padding:8px 18px;border-radius:8px;font-weight:600}

/* Hero */
.hero{background:linear-gradient(180deg,var(--soft),#fff);padding:60px 0 70px}
.hero-inner{display:grid;grid-template-columns:1.1fr .9fr;gap:46px;align-items:center}
.tags{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:16px}
.tag{font-size:13px;padding:4px 12px;border-radius:18px;background:#eef2f7;color:var(--ink);font-weight:600}
.tag.accent-bg{background:var(--accent);color:#fff}
.hero h1{font-size:40px;line-height:1.22;color:var(--ink);font-weight:800}
.sub{color:var(--muted);font-size:16px;margin:14px 0 22px}
.meta-row{display:flex;flex-wrap:wrap;gap:18px;margin-bottom:24px;font-size:14px;color:var(--muted)}
.meta-row b{display:block;color:var(--ink);font-size:15px}
.cta{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:16px}
.trust{font-size:13px;color:var(--muted)}
.hero-card{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden;box-shadow:var(--shadow);max-width:320px;margin:0 auto;width:100%}
.hc-bar{height:38px}
.hc-body{padding:28px;text-align:center}
.hc-logo{width:64px;height:64px;border-radius:16px;color:#fff;display:grid;place-items:center;font-weight:800;font-size:34px;margin:0 auto 12px}
.hc-title{font-size:20px;font-weight:800}
.hc-sub{color:var(--muted);font-size:13px;margin:4px 0 16px}

/* 内容区 */
.content-section{padding:60px 0}
.content-section.alt{background:var(--soft)}
.sec-title{font-size:26px;color:var(--ink);font-weight:800;margin-bottom:26px;text-align:center}
.prose h2{font-size:23px;color:var(--ink);margin:30px 0 12px;font-weight:800}
.prose h3{font-size:18px;margin:20px 0 8px}
.prose p{color:#3a4252;margin:0 0 14px}
.prose ul{margin:0 0 16px 20px;color:#3a4252}
.content-module{margin:0 0 34px}
.content-module:last-child{margin-bottom:0}
.prose ol{margin:0 0 16px 22px;color:#3a4252}
.prose table{width:100%;border-collapse:collapse;margin:18px 0;display:block;overflow-x:auto}
.prose th,.prose td{border:1px solid var(--line);padding:10px 12px;text-align:left;min-width:120px}
.prose th{background:var(--soft);color:var(--ink)}
.prose blockquote,.prose .callout{border-left:4px solid var(--accent);background:var(--soft);padding:14px 18px;margin:18px 0}
.prose li{margin-bottom:6px}
.prose details{background:#fff;border:1px solid var(--line);border-radius:10px;padding:16px 18px;margin-bottom:12px}
.prose details summary{font-weight:700;cursor:pointer;list-style:none;color:var(--ink)}
.prose details summary::-webkit-details-marker{display:none}

/* 文章卡片网格 */
.art-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.art-card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:20px;transition:.2s}
.art-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.art-card h3{font-size:17px;margin-bottom:8px;color:var(--ink)}
.art-card p{color:var(--muted);font-size:14px;margin-bottom:10px}
.rel-list{list-style:none}
.rel-list li{padding:10px 0;border-bottom:1px dashed var(--line)}
.rel-list a:hover{color:var(--accent)}

/* 文章页 */
.article-hero{background:#fff;padding:30px 0 10px}
.crumbs{font-size:13px;color:var(--muted);margin-bottom:14px}
.crumbs span{margin:0 6px}
.article-hero h1{font-size:32px;line-height:1.3;font-weight:800;margin-bottom:10px}
.meta-desc{color:var(--muted);font-size:15px}
.post-meta{font-size:13px;color:var(--muted);margin-top:10px;display:flex;gap:14px}
.post-meta .kw{color:var(--accent);font-weight:600}

/* CTA 带 */
.cta-band{padding:40px 0;color:#fff}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap}
.cta-band h2{font-size:24px;font-weight:800;color:#fff}
.cta-band p{color:rgba(255,255,255,.85);margin-top:4px}

/* 页脚 */
.site-footer{background:#161b26;color:#9aa6b8;padding:40px 0 26px;text-align:center}
.foot-brand{display:inline-flex;align-items:center;gap:8px;color:#fff;font-weight:700;margin-bottom:10px}
.foot-note{font-size:13px;max-width:560px;margin:0 auto 16px}
.foot-links{display:flex;justify-content:center;gap:20px;margin-bottom:18px}
.foot-links a{font-size:14px}
.foot-links a:hover{color:#fff}
.copy{font-size:12px;color:#5e6a7d}

/* 响应式 */
@media(max-width:860px){
  .nav a:not(.dl-btn){display:none}
  .hero-inner{grid-template-columns:1fr;gap:34px}
  .hero h1{font-size:30px}
  .art-grid{grid-template-columns:1fr}
  .mag-grid{grid-template-columns:1fr !important}
  .feature-inner{grid-template-columns:1fr !important}
  .big-h1{font-size:32px !important}
  .feature-main-inner h1{font-size:28px !important}
}

/* ===== 首页布局变体 ===== */
.btn-lg{padding:15px 34px;font-size:17px}
.muted{color:var(--muted)}

/* 居中型 */
.center-col{text-align:center;max-width:760px;margin:0 auto;padding:30px 0}
.big-h1{font-size:46px;line-height:1.2;color:var(--ink);font-weight:800}
.center-tags,.center-cta{justify-content:center}
.center-sub{max-width:620px;margin:16px auto 22px}
.center-chips{display:flex;gap:10px;justify-content:center;color:var(--muted);font-size:14px;margin-top:16px;flex-wrap:wrap}

/* 杂志网格型 */
.hero-magazine{padding:56px 0 60px}
.mag-head{text-align:center;max-width:680px;margin:0 auto 30px}
.mag-head h1{font-size:38px;color:var(--ink);font-weight:800;margin:12px 0}
.mag-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.mag-card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:22px;transition:.2s}
.mag-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.mag-kw{display:inline-block;font-size:12px;font-weight:700;margin-bottom:8px}
.mag-card h3{font-size:17px;margin-bottom:8px;color:var(--ink)}
.mag-card p{color:var(--muted);font-size:14px}

/* 大特色+列表型 */
.hero-feature{padding:50px 0 56px;background:var(--soft)}
.feature-inner{display:grid;grid-template-columns:1.3fr .7fr;gap:24px;align-items:stretch}
.feature-main{border-radius:16px;padding:40px;color:#fff;display:flex;align-items:center;min-height:300px}
.feature-main-inner h1{color:#fff;font-size:38px;margin:12px 0;font-weight:800}
.feature-sub{color:rgba(255,255,255,.92);margin-bottom:20px;font-size:16px}
.light-tag{background:rgba(255,255,255,.22);color:#fff}
.feature-side{background:#fff;border:1px solid var(--line);border-radius:16px;padding:22px}
.side-title{font-size:16px;margin-bottom:14px;color:var(--ink);font-weight:700}
.side-item{display:block;padding:11px 0;border-bottom:1px dashed var(--line)}
.side-item:last-child{border:none}
.side-kw{display:block;font-size:12px;font-weight:700;margin-bottom:2px}
.side-h{font-size:14px;color:var(--ink)}

/* v5: 首页 hero 图(DNA 配图) */
.hc-img{width:100%;height:170px;object-fit:cover;display:block}
.hero-banner{width:100%;max-width:760px;height:auto;border-radius:12px;margin-top:18px;box-shadow:0 8px 24px rgba(15,23,42,.12)}
.feature-main-inner .hero-banner{border-radius:10px}

/* 长文 TOC 目录 */
.toc{background:var(--soft,#f6f8fb);border:1px solid var(--line,#e8edf3);border-radius:12px;padding:16px 22px;margin:0 0 22px}
.toc-title{font-weight:800;font-size:15px;margin-bottom:8px;color:var(--ink,#1f2430)}
.toc ol{margin-left:20px;font-size:14px}
.toc li{margin:4px 0}
.toc a{color:var(--accent,#0a2540)}
.toc a:hover{text-decoration:underline}
@media(max-width:600px){.toc{padding:12px 16px}.toc ol{margin-left:16px}}