/* VPN 经验站（结构对齐 deekhub，配色按站品牌） */
:root{
  --brand:#0F766E; --brand-d:#0b5852; --ink:#1a1a1a; --muted:#5f6368;
  --line:#e6e8eb; --bg:#ffffff; --bg-soft:#f7f8fa; --radius:12px; --maxw:1080px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;color:var(--ink);background:var(--bg);
  font:16px/1.75 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Roboto,Helvetica,Arial,sans-serif;
}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
img,svg{max-width:100%;height:auto;display:block}
.container{max-width:var(--maxw);margin:0 auto;padding:0 16px}
.skip-link{position:absolute;left:-9999px}
.site-header{border-bottom:1px solid var(--line);background:var(--bg);position:sticky;top:0;z-index:50}
.header-inner{display:flex;align-items:center;gap:16px;height:60px}
.brand{font-weight:800;font-size:20px;color:var(--ink)}
.brand:hover{text-decoration:none;color:var(--brand)}
.site-nav{display:flex;gap:18px;flex:1;flex-wrap:wrap}
.site-nav a{color:var(--muted);font-size:15px}
.site-nav a:hover{color:var(--brand);text-decoration:none}
.site-search{display:flex;align-items:center;border:1px solid var(--line);border-radius:20px;overflow:hidden}
.site-search input{border:0;padding:7px 12px;outline:none;font-size:14px;background:transparent;width:150px}
.site-search button{border:0;background:transparent;padding:0 10px;cursor:pointer}
.nav-toggle{display:none;border:0;background:transparent;font-size:22px;cursor:pointer}
main{padding:40px 0 48px;min-height:60vh}
.breadcrumb{color:var(--muted);font-size:13px;margin:4px 0 22px}
.breadcrumb a{color:var(--muted)}
.page-title{font-size:30px;margin:0 0 6px}
.page-desc{color:var(--muted);margin:0 0 24px}
.section-title{font-size:20px;margin:8px 0 18px}
.hero{text-align:center;padding:18px 0 26px}
.post-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:22px}
.post-card{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--bg);
  display:flex;flex-direction:column;transition:box-shadow .2s,transform .2s}
.post-card:hover{box-shadow:0 6px 24px rgba(0,0,0,.08);transform:translateY(-2px)}
.post-card .cover{aspect-ratio:16/9;background:var(--bg-soft);width:100%;object-fit:cover}
.post-card .body{padding:16px 18px 18px;display:flex;flex-direction:column;gap:8px;flex:1}
.post-card h2{font-size:18px;line-height:1.45;margin:0}
.post-card h2 a{color:var(--ink)}
.post-card h2 a:hover{color:var(--brand);text-decoration:none}
.post-card .excerpt{color:var(--muted);font-size:14px;margin:0;flex:1}
.post-meta{color:var(--muted);font-size:12.5px;display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.badge{display:inline-block;background:#eaf1fe;color:var(--brand);font-size:12px;padding:2px 9px;border-radius:20px}
.article{max-width:760px;margin:0 auto}
.article-header h1{font-size:32px;line-height:1.3;margin:8px 0 12px}
.article .post-meta{margin-bottom:20px}
.article-cover{width:100%;border-radius:var(--radius);margin:0 0 24px;background:var(--bg-soft)}
.article-body{font-size:17px;line-height:1.9}
.article-body h2{font-size:22px;margin:36px 0 12px;padding-top:8px;border-bottom:1px solid var(--line);padding-bottom:6px}
.article-body h3{font-size:18px;margin:28px 0 10px}
.article-body p{margin:0 0 18px}
.article-body ul{margin:0 0 18px;padding-left:26px}
.article-body li{margin:0 0 6px}
.article-body hr{border:0;border-top:1px solid var(--line);margin:28px 0}
.article-body blockquote{margin:20px 0;padding:8px 18px;border-left:4px solid var(--brand);background:var(--bg-soft);color:var(--muted);border-radius:0 8px 8px 0}
.article-body table{width:100%;border-collapse:collapse;margin:0 0 22px;font-size:15px;overflow-x:auto;display:block}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top}
.article-body th{background:var(--bg-soft);font-weight:600}
.article-body img{margin:12px 0 20px;border-radius:8px}
.site-footer{border-top:1px solid var(--line);padding:28px 0 40px;color:var(--muted);font-size:13px}
.foot-nav{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:10px}
.friend-links{margin:18px 0 14px;padding-top:14px;border-top:1px dashed var(--line)}
.friend-links h3{margin:0 0 10px;font-size:14px;color:var(--ink);font-weight:600}
.friend-links ul{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:8px 14px}
.friend-links a{color:var(--muted);font-size:13px}
.friend-links a:hover{color:var(--brand)}
/* 绿竹加速推荐弹窗 */
.promo-mask{position:fixed;inset:0;background:rgba(15,23,42,.55);z-index:9999;display:flex;align-items:center;justify-content:center;padding:16px;opacity:0;visibility:hidden;transition:opacity .25s,visibility .25s}
.promo-mask.show{opacity:1;visibility:visible}
.promo-modal{position:relative;width:min(420px,100%);background:linear-gradient(165deg,#f0fdf4 0%,#fff 42%,#ecfdf5 100%);border-radius:16px;box-shadow:0 20px 50px rgba(0,0,0,.22);padding:28px 24px 22px;text-align:center;transform:translateY(12px) scale(.98);transition:transform .25s}
.promo-mask.show .promo-modal{transform:none}
.promo-badge{display:inline-block;background:#16a34a;color:#fff;font-size:12px;font-weight:700;padding:3px 10px;border-radius:999px;letter-spacing:.02em}
.promo-modal h2{margin:12px 0 8px;font-size:24px;color:#14532d;line-height:1.3}
.promo-modal .promo-sub{margin:0 0 14px;color:#3f6212;font-size:15px}
.promo-price{margin:0 0 18px;font-size:15px;color:#166534}
.promo-price strong{font-size:28px;color:#15803d;font-weight:800}
.promo-cta{display:inline-block;background:#16a34a;color:#fff!important;text-decoration:none!important;font-weight:700;font-size:16px;padding:12px 28px;border-radius:999px;box-shadow:0 8px 20px rgba(22,163,74,.35)}
.promo-cta:hover{background:#15803d}
.promo-close{position:absolute;top:10px;right:12px;border:0;background:transparent;font-size:22px;line-height:1;color:#64748b;cursor:pointer;padding:4px 8px}
.promo-dismiss{display:block;margin:14px auto 0;border:0;background:transparent;color:#94a3b8;font-size:13px;cursor:pointer}
@media (max-width:720px){
  .nav-toggle{display:block}
  .site-nav,.site-search{display:none}
  .site-nav.open{display:flex;flex-direction:column;position:absolute;left:0;right:0;top:60px;background:#fff;border-bottom:1px solid var(--line);padding:12px 16px}
  .article-header h1{font-size:24px}
}