/* 默认主题 · 浅色 / 扁平卡片 / 高信息密度 / 轻科技感 */
:root{
  --bg:#f4f7fc; --card:#ffffff; --ink:#1a2436; --ink-2:#3c4a61; --muted:#7a879c;
  --line:#e6ecf5; --brand:#2563eb; --brand-2:#0ea5e9; --brand-soft:#eaf1ff;
  --ok:#0a9b62; --warn:#d97706; --danger:#dc2626;
  --shadow:0 6px 22px rgba(30,64,120,.07); --shadow-hover:0 12px 30px rgba(30,64,120,.12);
  --radius:14px; --radius-sm:9px; --maxw:1200px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.75 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;-webkit-font-smoothing:antialiased}
a{color:var(--brand);text-decoration:none}
a:hover{color:#1d4ed8}
img{max-width:100%;height:auto;display:block}
h1,h2,h3,h4{line-height:1.35;margin:0;font-weight:700;letter-spacing:-.01em}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
.container{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--brand);color:#fff;padding:8px 14px;z-index:99}
.skip-link:focus{left:12px;top:12px}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;gap:20px;height:66px}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);min-width:190px}
.brand:hover{color:var(--ink)}
.brand-mark{display:grid;place-items:center;width:36px;height:36px;border-radius:10px;background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;font-weight:800;font-size:20px;box-shadow:0 4px 12px rgba(37,99,235,.28)}
.brand-text strong{display:block;font-size:16px;line-height:1.2}
.brand-text small{display:block;color:var(--muted);font-size:11px;line-height:1.4}
.main-nav{flex:1}
.main-nav ul{display:flex;align-items:center;gap:4px;flex-wrap:wrap}
.main-nav a{display:block;padding:7px 12px;border-radius:8px;color:var(--ink-2);font-size:14px;font-weight:500}
.main-nav a:hover{background:var(--brand-soft);color:var(--brand)}
.main-nav a.active,.main-nav a[aria-current="page"]{background:var(--brand-soft);color:var(--brand);font-weight:600;box-shadow:inset 0 -2px 0 var(--brand)}
/* 栏目区与「标签 / 站点地图」工具入口之间加一道分隔，结构在所有页面保持一致 */
.main-nav li.nav-extra:first-of-type{margin-left:4px;padding-left:9px;border-left:1px solid var(--line)}
.site-search{display:flex;align-items:center;background:#f1f5fb;border:1px solid var(--line);border-radius:999px;padding:3px 3px 3px 14px}
.site-search input{border:0;background:transparent;outline:0;width:150px;font-size:13px;color:var(--ink)}
.site-search button{border:0;background:var(--brand);color:#fff;border-radius:999px;padding:6px 15px;font-size:13px;cursor:pointer}
.site-search button:hover{background:#1d4ed8}
.nav-toggle,.nav-toggle-label{display:none}

/* ---------- Hero ---------- */
.hero{position:relative;display:grid;grid-template-columns:1.35fr 1fr;gap:28px;margin:26px 0 30px;padding:38px 40px;border-radius:20px;overflow:hidden;
  background:linear-gradient(120deg,#fff 0%,#f7faff 55%,#eef5ff 100%);border:1px solid var(--line);box-shadow:var(--shadow)}
.hero::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(37,99,235,.055) 1px,transparent 1px),linear-gradient(90deg,rgba(37,99,235,.055) 1px,transparent 1px);background-size:26px 26px;mask-image:linear-gradient(90deg,#000,transparent 72%);pointer-events:none}
.hero>*{position:relative}
.hero-main{display:flex;flex-direction:column;justify-content:center}
.eyebrow{display:inline-block;align-self:flex-start;font-size:11px;letter-spacing:.16em;color:var(--brand);font-weight:700;background:var(--brand-soft);border:1px solid #d5e4ff;padding:4px 10px;border-radius:999px}
.hero h1{font-size:34px;margin:16px 0 12px;background:linear-gradient(100deg,#16233d,#2563eb);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-desc{color:var(--ink-2);max-width:620px;font-size:15px}
.hero-actions{display:flex;gap:10px;margin-top:22px;flex-wrap:wrap}
.btn-primary,.btn-ghost{display:inline-block;padding:10px 20px;border-radius:9px;font-size:14px;font-weight:600}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 16px rgba(37,99,235,.25)}
.btn-primary:hover{color:#fff;background:#1d4ed8}
.btn-ghost{background:#fff;color:var(--brand);border:1px solid #d9e5fb}
.btn-ghost:hover{background:var(--brand-soft)}
.hero-side{display:grid;gap:10px;align-content:center}
.feature{display:grid;grid-template-columns:34px 1fr;grid-template-rows:auto auto;gap:0 12px;background:rgba(255,255,255,.85);border:1px solid var(--line);padding:12px 14px;border-radius:12px}
.feature span{grid-row:1/3;align-self:center;display:grid;place-items:center;width:32px;height:32px;border-radius:8px;background:var(--brand-soft);color:var(--brand);font-size:12px;font-weight:800}
.feature strong{font-size:14px}
.feature small{color:var(--muted);font-size:12px}

/* ---------- Sections ---------- */
.section{margin-bottom:28px}
.section-head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin-bottom:14px;padding-bottom:10px;border-bottom:1px solid var(--line)}
.section-head h2{font-size:18px;position:relative;padding-left:12px}
.section-head h2::before{content:"";position:absolute;left:0;top:4px;bottom:4px;width:4px;border-radius:3px;background:linear-gradient(var(--brand),var(--brand-2))}
.section-sub,.more{font-size:13px;color:var(--muted)}
.more{color:var(--brand)}
.two-col{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:24px;align-items:start}
.col-main,.col-side{min-width:0}

.cats-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:14px}
.cat-card{position:relative;display:block;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow);transition:.2s;color:var(--ink)}
.cat-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:#cfe0ff;color:var(--ink)}
.cat-card h3{font-size:16px;margin:0 0 6px}
.cat-card p{color:var(--muted);font-size:13px;min-height:40px}
.cat-more{display:inline-block;margin-top:10px;font-size:12px;color:var(--brand);font-weight:600}

/* ---------- Post cards ---------- */
.post-list{display:grid;gap:14px}
.post-card{display:grid;grid-template-columns:1fr;gap:18px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px 20px;box-shadow:var(--shadow);transition:.2s}
.post-card.has-thumb{grid-template-columns:180px 1fr;padding:16px}
.post-card{position:relative;overflow:hidden}
.post-card::after{content:"";position:absolute;left:0;top:16px;bottom:16px;width:3px;border-radius:0 3px 3px 0;background:linear-gradient(var(--brand),var(--brand-2));opacity:0;transition:opacity .2s}
.post-card:hover::after{opacity:1}
.post-card:hover{box-shadow:var(--shadow-hover);border-color:#d8e6ff;transform:translateY(-2px)}
.post-thumb{display:block;width:180px;height:126px;border-radius:10px;overflow:hidden;background:linear-gradient(135deg,#eaf1ff,#dbeafe)}
.post-thumb img{width:100%;height:100%;object-fit:cover}
.post-body{min-width:0}
.post-meta{display:flex;gap:12px;flex-wrap:wrap;align-items:center;color:var(--muted);font-size:12px}
.post-meta a{font-weight:600}
.post-body h2,.post-body h3{font-size:17px;margin:8px 0 6px}
.post-card:not(.has-thumb) .post-body h2,.post-card:not(.has-thumb) .post-body h3{font-size:18.5px}
.post-body h2 a,.post-body h3 a{color:var(--ink)}
.post-body h2 a:hover,.post-body h3 a:hover{color:var(--brand)}
.post-body p{color:var(--ink-2);font-size:13px;line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-more{display:inline-block;margin-top:8px;font-size:12px;font-weight:600}
.load-more{display:flex;flex-direction:column;align-items:center;gap:8px;margin:22px 0 4px;min-height:22px}
.load-more-spin{display:inline-flex;align-items:center;gap:8px;color:var(--muted);font-size:13px}
.load-more-spin i{width:14px;height:14px;border:2px solid var(--line);border-top-color:var(--brand);border-radius:50%;animation:lm-spin .7s linear infinite}
[hidden]{display:none!important}
@keyframes lm-spin{to{transform:rotate(360deg)}}
@media (prefers-reduced-motion:reduce){.load-more-spin i{animation-duration:1.8s}}
.load-more-end{margin:0;color:var(--muted);font-size:13px}
.load-more-err{margin:0;color:#c0392b;font-size:13px}

/* ---------- Sidebar ---------- */
.side-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px;box-shadow:var(--shadow);margin-bottom:16px}
.side-card h2{font-size:15px;margin-bottom:12px;padding-bottom:9px;border-bottom:1px solid var(--line)}
.rank-list li{border-bottom:1px dashed var(--line)}
.rank-list li:last-child{border-bottom:0}
.rank-list a{display:flex;gap:10px;padding:8px 0;color:var(--ink-2);font-size:13px;line-height:1.55}
.rank-list a:hover{color:var(--brand)}
.rank-no{flex:none;width:20px;height:20px;border-radius:6px;background:var(--brand-soft);color:var(--brand);font-size:11px;font-weight:700;display:grid;place-items:center}
.tag-cloud{display:flex;flex-wrap:wrap;gap:7px}
.tag-cloud a{background:#f3f7fd;border:1px solid var(--line);border-radius:999px;padding:4px 10px;font-size:12px;color:var(--ink-2)}
.tag-cloud a:hover{background:var(--brand-soft);color:var(--brand);border-color:#cfe0ff}
.tag-cloud sup{color:var(--muted);margin-left:3px;font-size:10px}
.cat-list li,.archive-list li{border-bottom:1px dashed var(--line)}
.cat-list li:last-child,.archive-list li:last-child{border-bottom:0}
.cat-list a,.archive-list a{display:flex;justify-content:space-between;gap:10px;padding:8px 2px;font-size:13px;color:var(--ink-2)}
.cat-list a:hover,.archive-list a:hover{color:var(--brand)}
.cat-list span,.archive-list span{color:var(--muted);font-size:12px}
.side-tip p{font-size:13px;color:var(--muted);margin-bottom:8px}
/* 空数据时整块隐藏，避免侧栏出现只有标题的空卡片 */
.side-card:has(.tag-cloud:empty),.side-card:has(.rank-list:empty){display:none}

/* ---------- Page head / breadcrumbs ---------- */
.crumbs{margin:18px 0 14px;font-size:12px;color:var(--muted)}
.crumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:6px}
.crumbs a{color:var(--muted)}
.crumbs a:hover{color:var(--brand)}
.crumbs .sep{color:#c2ccdb}
.crumbs [aria-current="page"]{color:var(--ink-2)}
.page-head{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px 26px;box-shadow:var(--shadow);margin-bottom:22px}
.page-head h1{font-size:26px;margin-bottom:8px}
.page-head p{color:var(--muted);font-size:14px}

/* ---------- Pagination ---------- */
.pager{margin-top:20px}
.pager ul{display:flex;flex-wrap:wrap;gap:6px;justify-content:center}
.pager a,.pager span{display:block;min-width:34px;padding:6px 11px;text-align:center;border:1px solid var(--line);background:#fff;border-radius:8px;font-size:13px;color:var(--ink-2)}
.pager a:hover{border-color:var(--brand);color:var(--brand)}
.pager .active span{background:var(--brand);border-color:var(--brand);color:#fff}
.pager .dots{color:var(--muted);padding:6px 4px}

/* ---------- Article ---------- */
.article,.article-page{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:30px 34px;box-shadow:var(--shadow)}
.article-head{border-bottom:1px solid var(--line);padding-bottom:20px;margin-bottom:22px}
.article-kicker{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--brand);font-weight:600;margin-bottom:10px}
.article-kicker .dot{color:var(--muted)}
/* 原创标记：模板内硬编码，不随文章来源/接口推送变化 */
.badge-origin{display:inline-flex;align-items:center;flex:0 0 auto;height:19px;padding:0 6px;border-radius:5px;
  background:linear-gradient(135deg,#ff6b3d,#df3d28);color:#fff;font-size:11px;font-weight:700;
  line-height:1;white-space:nowrap;box-shadow:0 1px 2px rgba(223,61,40,.22)}
.article-kicker .badge-origin{height:22px;padding:0 9px;font-size:11.5px;border-radius:6px}
.post-meta .badge-origin{transform:translateY(-.5px)}
.article h1{font-size:30px;line-height:1.4}
.article-subtitle{color:var(--muted);font-size:15px;margin-top:8px}
.article-meta{display:flex;flex-wrap:wrap;gap:14px;margin-top:16px;color:var(--muted);font-size:12.5px;align-items:center}
.meta-author{display:inline-flex;align-items:center;gap:7px;color:var(--ink-2)}
.meta-author a{color:var(--ink-2);font-weight:600}
.meta-author a:hover{color:var(--brand)}
.meta-avatar{width:28px;height:28px;border-radius:50%;object-fit:cover;border:1px solid var(--line);background:#eef4ff}
.article-cover{margin:0 0 22px;border-radius:12px;overflow:hidden}
.article-cover img{width:100%;max-height:420px;object-fit:cover}
.article-body{font-size:15.5px;line-height:1.95;color:var(--ink-2);max-width:760px}
.article-body h2,.article-body h3,.article-body h4{color:var(--ink);scroll-margin-top:90px;margin:30px 0 12px}
.article-body h2{font-size:21px;padding-left:12px;border-left:4px solid var(--brand)}
.article-body h3{font-size:18px}
.article-body h4{font-size:16px}
.article-body p{margin:0 0 16px}
.article-body a{text-decoration:underline;text-underline-offset:3px}
.article-body a.auto-link{color:var(--brand);font-weight:600;text-decoration:none;border-bottom:1px dashed var(--brand)}
.article-body ul,.article-body ol{margin:0 0 18px;padding-left:24px}
.article-body ul{list-style:disc}
.article-body ol{list-style:decimal}
.article-body li{margin:5px 0}
.article-body blockquote{margin:18px 0;padding:12px 18px;background:#f6f9ff;border-left:4px solid var(--brand-2);border-radius:0 8px 8px 0;color:var(--ink-2)}
.article-body pre{background:#0f1b2e;color:#dbe8ff;padding:16px 18px;border-radius:10px;overflow-x:auto;font-size:13px;line-height:1.7}
.article-body code{background:#f1f5fb;color:#c026d3;padding:2px 6px;border-radius:5px;font-size:.9em}
.article-body pre code{background:transparent;color:inherit;padding:0}
.article-body img{border-radius:10px;margin:18px auto}
.article-body hr{border:0;border-top:1px solid var(--line);margin:26px 0}
.article-body strong{color:var(--ink)}
.article-body>p:first-child{font-size:16.5px;color:var(--ink);line-height:1.9}
.article-body table{width:100%;border-collapse:collapse;margin:20px 0;font-size:14px;border:1px solid var(--line);border-radius:10px;overflow:hidden}
.article-body th,.article-body td{padding:10px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.article-body th{background:#f6f9ff;color:var(--ink);font-weight:600}
.article-body tbody tr:nth-child(even){background:#fbfdff}
.article-body tbody tr:last-child td{border-bottom:0}
.article-body figure{margin:22px 0}
.article-body figcaption{text-align:center;font-size:12.5px;color:var(--muted);margin-top:8px}

/* ---------- 正文增量块：要点速览 / 关键数据 / 常见问题 / 复核 / 站内延伸 ----------
   由 Differentiator 在接口稿入库时注入，目的是让同一篇稿件在本站比在其他平台多出可用的结构 */
.art-brief,.art-data{margin:0 0 22px;padding:16px 20px;border-radius:12px;border:1px solid #dbe8ff;background:linear-gradient(120deg,#f7fbff,#eef5ff)}
.art-block-h{margin:0 0 10px;font-size:13px;letter-spacing:.4px;color:var(--brand);font-weight:600}
.art-block-h strong{color:var(--brand)}
.art-brief ul{margin:0;padding-left:20px}
.art-brief li{margin:6px 0;line-height:1.8;color:var(--ink-2)}
.art-brief li::marker{color:var(--brand)}
.art-data{border-color:#e3ecfa;background:#fbfdff}
.art-data dl{display:grid;grid-template-columns:minmax(96px,auto) 1fr;gap:8px 16px;margin:0;align-items:baseline}
.art-data dt{margin:0;font-size:13px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.art-data dd{margin:0;font-size:15px;font-weight:700;color:var(--ink);font-variant-numeric:tabular-nums}
.art-faq{margin:30px 0 22px;padding:18px 20px;background:#fbfdff;border:1px solid var(--line);border-radius:12px}
.art-faq h2{margin:0 0 12px!important;padding-left:0!important;border-left:0!important;font-size:17px!important}
.art-faq-item{border-top:1px solid var(--line);padding:10px 0}
.art-faq-item:first-of-type{border-top:0;padding-top:0}
.art-faq-item summary{cursor:pointer;font-weight:600;color:var(--ink);font-size:14.5px;line-height:1.7;list-style:none;position:relative;padding-left:20px}
.art-faq-item summary::-webkit-details-marker{display:none}
.art-faq-item summary::before{content:"Q";position:absolute;left:0;top:0;color:var(--brand);font-weight:700}
.art-faq-item[open] summary{color:var(--brand)}
.art-faq-a{margin:8px 0 2px 20px;color:var(--ink-2);line-height:1.85;font-size:14.5px}
.art-stamp{margin:26px 0 10px;padding-top:14px;border-top:1px dashed var(--line)}
.art-stamp p{margin:0;font-size:12.5px;line-height:1.8;color:var(--muted)}
.art-stamp a{color:var(--ink-2)}
.art-related{margin:22px 0 0;padding:14px 18px;background:#f8fafd;border-radius:12px}
.art-related ul{margin:0;padding-left:20px}
.art-related li{margin:5px 0;font-size:14px}
.article-body>div.art-brief+p{margin-top:0}
@media(max-width:640px){
  .art-data dl{grid-template-columns:1fr;gap:2px 0}
  .art-data dt{margin-top:8px;font-size:12px}
  .art-brief,.art-data{padding:14px 16px}
}

/* ---------- 作者：文章底部名片 / 作者主页 ---------- */
.author-card{display:flex;gap:16px;align-items:flex-start;margin-top:24px;padding:18px 20px;background:linear-gradient(120deg,#f8fbff,#f2f7ff);border:1px solid #e2ecfd;border-radius:12px}
.author-card-avatar{width:64px;height:64px;border-radius:50%;object-fit:cover;border:2px solid #fff;box-shadow:0 3px 10px rgba(30,64,120,.12);flex:none;background:#eef4ff}
.author-card-body{min-width:0}
.author-card-name{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:15px;font-weight:700;color:var(--ink)}
.author-card-name a{color:var(--ink)}
.author-card-name a:hover{color:var(--brand)}
.author-card-role{font-size:11px;font-weight:600;color:var(--brand);background:var(--brand-soft);padding:2px 8px;border-radius:999px}
.author-card-bio{font-size:13px;color:var(--ink-2);margin-top:6px;line-height:1.7}
.author-card-more{display:inline-block;margin-top:8px;font-size:12px;font-weight:600}

.author-hero{display:flex;gap:22px;align-items:flex-start;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px 28px;box-shadow:var(--shadow);margin-bottom:24px;position:relative;overflow:hidden}
.author-hero::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(37,99,235,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(37,99,235,.05) 1px,transparent 1px);background-size:26px 26px;mask-image:linear-gradient(90deg,#000,transparent 70%);pointer-events:none}
.author-hero>*{position:relative}
.author-hero-avatar{width:96px;height:96px;border-radius:50%;object-fit:cover;border:3px solid #fff;box-shadow:0 6px 18px rgba(30,64,120,.16);flex:none;background:#eef4ff}
.author-hero h1{font-size:24px;margin:10px 0 4px}
.author-hero-role{font-size:13px;color:var(--brand);font-weight:600}
.author-hero-bio{font-size:14px;color:var(--ink-2);margin-top:8px;max-width:760px}
.author-hero-meta{display:flex;flex-wrap:wrap;gap:16px;margin-top:12px;font-size:12.5px;color:var(--muted)}
.author-hero-meta strong{color:var(--ink)}
.author-hero-facts{display:flex;gap:26px;margin-left:auto;align-self:center;padding-left:24px;border-left:1px dashed #dbe6f7}
.author-hero-facts div{display:flex;flex-direction:column;gap:2px;text-align:center}
.author-hero-facts dt{font-size:11.5px;color:var(--muted);letter-spacing:.08em}
.author-hero-facts dd{margin:0;font-size:24px;font-weight:800;line-height:1.1;color:var(--brand)}

.toc{background:#f7faff;border:1px solid #e2ecfd;border-radius:12px;padding:16px 20px;margin-bottom:24px}
.toc-title{font-size:13px;font-weight:700;color:var(--brand);margin-bottom:8px}
.toc ol{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:2px 18px}
.toc li{font-size:13px;border-bottom:1px dashed #e5ecf8}
.toc li a{display:block;padding:5px 0;color:var(--ink-2)}
.toc li a:hover{color:var(--brand)}
.toc .toc-lv1{padding-left:14px}
.toc .toc-lv2{padding-left:28px}

.faq{margin-top:28px}
.faq h2{font-size:20px;margin-bottom:12px}
.faq-item{background:#f9fbff;border:1px solid var(--line);border-radius:10px;margin-bottom:8px;padding:12px 16px}
.faq-item summary{cursor:pointer;font-weight:600;color:var(--ink)}
.faq-a{padding-top:10px;color:var(--ink-2);font-size:14px}
.article-foot{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;margin-top:28px;padding-top:18px;border-top:1px solid var(--line)}
.article-tags{display:flex;flex-wrap:wrap;gap:8px}
.article-tags a{background:var(--brand-soft);border-radius:999px;padding:4px 11px;font-size:12px}
.back-top{font-size:12px;color:var(--muted)}
.prevnext{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:20px}
.pn-item{display:block;background:#f7faff;border:1px solid var(--line);border-radius:10px;padding:12px 16px;color:var(--ink)}
.pn-item:hover{border-color:var(--brand);color:var(--brand)}
.pn-item span{display:block;font-size:11px;color:var(--muted);margin-bottom:4px}
.pn-item strong{display:block;font-size:14px;font-weight:600;line-height:1.5}

.related-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:12px}
.related-card{display:block;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px;box-shadow:var(--shadow);color:var(--ink);transition:.2s}
.related-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);color:var(--ink);border-color:#d8e6ff}
.related-cat{font-size:11px;color:var(--brand);background:var(--brand-soft);padding:2px 8px;border-radius:999px}
.related-card h3{font-size:15px;margin:10px 0 6px}
.related-card p{font-size:12.5px;color:var(--muted);min-height:42px}
.related-card time{font-size:11px;color:var(--muted)}

/* ---------- Tags / Sitemap / Search / 404 ---------- */
.all-tags{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:12px}
.all-tag{display:block;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px;box-shadow:var(--shadow);color:var(--ink)}
.all-tag:hover{border-color:var(--brand);color:var(--brand)}
.all-tag strong{font-size:15px}
.all-tag span{float:right;font-size:11px;color:var(--muted)}
.all-tag p{clear:both;font-size:12px;color:var(--muted);margin-top:8px}
.sitemap-group{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px 22px;box-shadow:var(--shadow);margin-bottom:14px}
.sitemap-group h2{font-size:17px;margin-bottom:12px}
.sitemap-group h2 a{color:var(--ink)}
.sitemap-links{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:2px 18px}
.sitemap-links li{display:flex;justify-content:space-between;gap:10px;font-size:13px;border-bottom:1px dashed var(--line);padding:5px 0}
.sitemap-links a{color:var(--ink-2)}
.sitemap-links a:hover{color:var(--brand)}
.sitemap-links time{color:var(--muted);font-size:11px;white-space:nowrap}
.big-search{display:flex;gap:8px;margin-bottom:20px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px;box-shadow:var(--shadow)}
.big-search input{flex:1;border:0;outline:0;padding:8px 12px;font-size:15px}
.big-search button{border:0;background:var(--brand);color:#fff;border-radius:8px;padding:8px 24px;cursor:pointer;font-size:14px}
.search-hint{margin-top:16px;font-size:13px;color:var(--muted)}
.search-count{font-size:13px;color:var(--muted);margin-bottom:14px}
.search-count strong{color:var(--brand);font-size:15px}
.empty-state{text-align:center;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:44px 24px;box-shadow:var(--shadow)}
.empty-state strong{display:block;font-size:18px;margin-bottom:8px}
.empty-state p{color:var(--muted);font-size:14px}
.notfound-code{display:block;font-size:76px;font-weight:800;line-height:1;background:linear-gradient(120deg,var(--brand),var(--brand-2));-webkit-background-clip:text;background-clip:text;color:transparent;letter-spacing:.06em}
.notfound h1{font-size:26px;margin:12px 0 8px}
.notfound .hero-actions{justify-content:center}

/* ---------- Footer ---------- */
.site-footer{margin-top:40px;background:#fff;border-top:1px solid var(--line)}
.footer-inner{display:grid;grid-template-columns:1fr auto;gap:10px 24px;padding-top:26px;padding-bottom:26px}
.footer-brand strong{font-size:15px}
.footer-brand p{font-size:12px;color:var(--muted);max-width:560px;margin-top:4px}
.footer-links{display:flex;flex-wrap:wrap;gap:16px;font-size:12px}
.copyright{grid-column:1/-1;font-size:12px;color:var(--muted);border-top:1px dashed var(--line);padding-top:14px;margin-top:4px}

/* ---------- Responsive ---------- */
@media (max-width:980px){
  .two-col{grid-template-columns:1fr}
  .col-side{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:14px}
  .hero{grid-template-columns:1fr;padding:28px}
  .hero-side{grid-template-columns:repeat(3,1fr)}
  .feature{grid-template-columns:30px 1fr}
  .site-search input{width:110px}
}
/* 960~1100px 时导航会换行（「站点地图」掉到第二行），提前折叠为汉堡菜单 */
@media (max-width:1100px){
  .header-inner{height:auto;flex-wrap:wrap;padding:10px 16px;gap:10px}
  .nav-toggle{position:absolute;opacity:0;pointer-events:none}
  .nav-toggle-label{display:grid;place-items:center;width:36px;height:36px;border:1px solid var(--line);border-radius:8px;cursor:pointer;font-size:18px;color:var(--brand)}
  .main-nav{order:3;width:100%;display:none}
  .nav-toggle:checked ~ .main-nav{display:block}
  .main-nav ul{flex-direction:column;align-items:stretch}
  .main-nav a{padding:10px 12px}
  .main-nav li.nav-extra:first-of-type{margin:4px 0 0;padding:6px 0 0;border-left:0;border-top:1px solid var(--line)}
}
@media (max-width:720px){
  .header-inner{height:auto;flex-wrap:wrap;padding:10px 16px;gap:10px}
  .brand{min-width:0;flex:1}
  .nav-toggle{position:absolute;opacity:0;pointer-events:none}
  .nav-toggle-label{display:grid;place-items:center;width:36px;height:36px;border:1px solid var(--line);border-radius:8px;cursor:pointer;font-size:18px;color:var(--brand)}
  .main-nav{order:3;width:100%;display:none}
  .nav-toggle:checked ~ .main-nav{display:block}
  .main-nav ul{flex-direction:column;align-items:stretch}
  .main-nav a{padding:10px 12px}
  .site-search{order:2;width:100%}
  .site-search input{flex:1;width:auto}
  .hero{padding:22px;margin:16px 0 20px}
  .hero h1{font-size:26px}
  .hero-side{grid-template-columns:1fr}
  .feature{grid-template-columns:32px 1fr}
  .cats-grid,.related-grid,.all-tags{grid-template-columns:1fr}
  .post-card{grid-template-columns:1fr}
  .post-thumb{width:100%;height:170px}
  .article,.article-page{padding:20px 18px}
  .article h1{font-size:24px}
  .author-hero{flex-direction:column;gap:14px;padding:20px 18px}
  .author-hero-avatar{width:72px;height:72px}
  .author-card{padding:16px}
  .author-card-avatar{width:52px;height:52px}
  .author-hero-facts{margin:12px 0 0;padding:12px 0 0;border-left:0;border-top:1px dashed #dbe6f7;align-self:flex-start}
  .post-card{padding:16px}
  .post-card:not(.has-thumb) .post-body h2,.post-card:not(.has-thumb) .post-body h3{font-size:17.5px}
  .prevnext{grid-template-columns:1fr}
  .footer-inner{grid-template-columns:1fr}
  .footer-links{gap:12px}
  .sitemap-links{grid-template-columns:1fr}
}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}