/* base.天线.公司 —— 原创深色科技风样式（前缀 base-） */
:root{
  --base-ink:#0A1424;
  --base-surface:#0F1F36;
  --base-surface-2:#13284a;
  --base-signal:#22D3EE;
  --base-violet:#7C5CFC;
  --base-gold:#F5B82E;
  --base-text:#E6EDF5;
  --base-muted:#9FB2C8;
  --base-line:#1E3354;
  --base-line-soft:#16314f;
  --h2-inset:16px;            /* 面包屑 / H2 左缘对齐基准（[M18c++]） */
  --maxw:2400px;
  --head-h:64px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body.base-body{
  margin:0;background:var(--base-ink);color:var(--base-text);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased;
}
a{color:var(--base-signal);text-decoration:none;}
a:hover{text-decoration:underline;}
img{max-width:100%;}

/* ===== 顶栏 ===== */
.base-header{position:sticky;top:0;z-index:50;height:var(--head-h);
  background:rgba(10,20,36,.92);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--base-line);}
.base-header-inner{max-width:var(--maxw);margin:0 auto;height:100%;
  display:flex;align-items:center;gap:18px;padding:0 20px;}
.base-logo{font-weight:800;font-size:18px;color:#fff;letter-spacing:.5px;white-space:nowrap;}
.base-nav-toggle{display:none;background:none;border:1px solid var(--base-line);color:var(--base-text);
  border-radius:8px;padding:6px 12px;cursor:pointer;font-size:14px;}
.base-nav{flex:1;}
.base-nav-list{display:flex;gap:6px;list-style:none;margin:0;padding:0;align-items:center;}
.base-nav-item{position:relative;}
.base-nav-top{cursor:pointer;padding:10px 14px;display:block;color:var(--base-text);font-size:14px;border-radius:8px;}
.base-nav-top:hover{background:var(--base-surface);}
.base-nav-drop:hover .base-nav-sub{display:block;}
.base-nav-sub{display:none;position:absolute;top:100%;left:0;min-width:180px;
  background:var(--base-surface);border:1px solid var(--base-line);border-radius:10px;
  padding:8px;box-shadow:0 12px 30px rgba(0,0,0,.4);z-index:60;}
.base-nav-sub .base-nav-link{display:block;padding:8px 12px;border-radius:8px;color:var(--base-text);font-size:14px;}
.base-nav-sub .base-nav-link:hover{background:var(--base-surface-2);text-decoration:none;}
.base-nav-list>li:not(.base-nav-drop) .base-nav-link{padding:10px 14px;display:block;color:var(--base-text);font-size:14px;border-radius:8px;}
.base-nav-list>li:not(.base-nav-drop) .base-nav-link:hover{background:var(--base-surface);}

/* ===== 面包屑（与 H2 左缘对齐） ===== */
.base-main{max-width:var(--maxw);margin:0 auto;padding:18px 20px 48px;}
.base-crumb{font-size:13px;color:var(--base-muted);margin:4px 0 18px;}
.base-crumb-list{list-style:none;display:flex;flex-wrap:wrap;gap:6px;margin:0;padding:0;}
.base-crumb-item:not(:last-child)::after{content:"›";margin-left:6px;color:var(--base-muted);}
.base-crumb-item a{color:var(--base-muted);}
.base-crumb-item a:hover{color:var(--base-signal);}

/* ===== 详情页布局 ===== */
.base-layout{display:grid;grid-template-columns:minmax(0, 1fr) 240px;gap:32px;align-items:start;}
.base-content-main{padding-left:var(--h2-inset);}
.base-h1{font-size:30px;line-height:1.3;margin:.2em 0 .6em;color:#fff;
  background:linear-gradient(90deg,var(--base-signal),var(--base-violet));
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;}
.base-content-main h2{font-size:22px;margin:1.6em 0 .7em;color:#fff;
  border-left:4px solid var(--base-signal);padding-left:12px;}
.base-content-main h3{font-size:18px;margin:1.3em 0 .6em;color:var(--base-signal);}
.base-content-main p{margin:.7em 0;color:var(--base-text);}
.base-content-main ul,.base-content-main ol{margin:.7em 0;padding-left:1.4em;}
.base-content-main li{margin:.35em 0;}
.base-update{font-size:13px;color:var(--base-muted);margin:.4em 0 1.2em;}
.base-update time{font-style:normal;}

/* 表格全覆盖（[M26]） */
.base-content-main table,table.base-spec{border-collapse:collapse;width:100%;margin:1em 0;
  font-size:14px;background:var(--base-surface);}
.base-content-main table th,table.base-spec th{background:var(--base-violet);color:#fff;
  text-align:left;padding:10px 12px;border:1px solid #2a4a78;}
.base-content-main table td,table.base-spec td{border:1px solid var(--base-line);padding:10px 12px;color:var(--base-text);}
.base-content-main table tbody tr:nth-child(even),table.base-spec tbody tr:nth-child(even){background:var(--base-surface-2);}

.base-callout{border-left:4px solid var(--base-gold);background:rgba(245,184,46,.08);
  padding:12px 16px;margin:1em 0;border-radius:0 8px 8px 0;color:var(--base-text);}

/* FAQ（裸 details） */
.base-faq-item{border:1px solid var(--base-line);border-radius:10px;margin:10px 0;background:var(--base-surface);}
.base-faq-item summary{cursor:pointer;padding:12px 16px;font-weight:600;color:#fff;}
.base-faq-item .base-faq-a{padding:0 16px 14px;color:var(--base-text);}
.base-faq-item[open] summary{border-bottom:1px solid var(--base-line);}

.base-related{margin-top:2em;border-top:1px solid var(--base-line);padding-top:1em;}
.base-related h2{font-size:18px;}
.base-related ul{list-style:none;padding-left:0;}
.base-related li{margin:.4em 0;}
.base-related a{color:var(--base-signal);}

/* TOC 悬浮（原生 details，[M25]） */
.base-toc-aside{position:sticky;top:calc(var(--head-h) + 16px);max-height:calc(100vh - 100px);overflow:auto;}
.base-toc-panel{border:1px solid var(--base-line);border-radius:10px;background:var(--base-surface);padding:10px 12px;}
.base-toc-panel>summary{cursor:pointer;font-weight:700;color:#fff;margin-bottom:6px;}
.base-toc-list{list-style:none;margin:0;padding-left:0;}
.base-toc-list li{margin:4px 0;}
.base-toc-list a{color:var(--base-muted);font-size:13px;}
.base-toc-list a:hover{color:var(--base-signal);}
.base-toc-h3{padding-left:14px;}

/* ===== 列表页布局（[M27] 栅格列序 240px minmax(0,1fr)） ===== */
.base-list-layout{display:grid;grid-template-columns:240px minmax(0,1fr);gap:28px;align-items:start;}
.base-cat-side{position:sticky;top:calc(var(--head-h) + 16px);}
.base-cat-panel{border:1px solid var(--base-line);border-radius:10px;background:var(--base-surface);padding:10px 12px;}
.base-cat-panel>summary{cursor:pointer;font-weight:700;color:#fff;margin-bottom:6px;}
.base-category-list{list-style:none;margin:0;padding-left:0;}
.base-category-list .base-cat-link{display:block;padding:8px 12px;border-radius:8px;color:var(--base-text);font-size:14px;}
.base-category-list .base-cat-link:hover{background:var(--base-surface-2);text-decoration:none;color:var(--base-signal);}
.base-cat-content{padding-left:var(--h2-inset);}
.base-list-items{list-style:none;padding-left:0;display:grid;gap:12px;}
.base-list-item{background:var(--base-surface);border:1px solid var(--base-line);border-radius:10px;padding:14px 16px;}
.base-list-item a{font-size:17px;font-weight:600;color:#fff;}
.base-list-item span{display:inline-block;margin-left:10px;font-size:13px;color:var(--base-muted);}

/* ===== 页面（about 等） ===== */
.base-page-wrap{--h2-inset:48px;}
.base-page-wrap .base-content-main{padding-left:var(--h2-inset);max-width:1640px;}

/* ===== 首页 ===== */
.base-hero{background:radial-gradient(1200px 400px at 70% -10%,rgba(124,92,252,.35),transparent),
  radial-gradient(900px 380px at 10% 10%,rgba(34,211,238,.22),transparent),var(--base-surface);
  border:1px solid var(--base-line);border-radius:18px;padding:54px 40px;margin-bottom:26px;}
.base-hero-inner{max-width:var(--maxw);}
.base-hero-title{font-size:40px;margin:.1em 0;color:#fff;
  background:linear-gradient(90deg,var(--base-signal),var(--base-violet),var(--base-gold));
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;}
.base-hero-sub{font-size:18px;color:var(--base-muted);margin:.4em 0 0;}
.base-home-section{margin:30px 0;}
.base-home-h2{font-size:24px;color:#fff;border-left:4px solid var(--base-gold);padding-left:12px;margin-bottom:14px;}
.base-home-text{color:var(--base-text);line-height:1.9;}
.base-home-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px;}
.base-home-card{display:block;background:var(--base-surface);border:1px solid var(--base-line);
  border-radius:12px;padding:18px;color:#fff;transition:.2s;}
.base-home-card:hover{border-color:var(--base-signal);transform:translateY(-3px);text-decoration:none;}
.base-home-card h3{margin:0 0 8px;font-size:18px;color:var(--base-signal);}
.base-home-card p{margin:0;color:var(--base-muted);font-size:14px;}
.base-home-articles{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:12px;}
.base-home-article{display:block;background:var(--base-surface);border:1px solid var(--base-line);
  border-radius:10px;padding:14px;color:var(--base-text);font-size:15px;}
.base-home-article:hover{color:var(--base-signal);text-decoration:none;}

.base-archive-list{list-style:none;padding-left:0;display:grid;gap:8px;columns:2;}
.base-archive-list li{break-inside:avoid;background:var(--base-surface);border:1px solid var(--base-line);
  border-radius:8px;padding:10px 14px;}
.base-archive-list a{color:var(--base-text);}

/* ===== 悬浮胶囊 ===== */
.base-float{position:fixed;right:18px;top:50%;transform:translateY(-50%);z-index:80;
  display:flex;flex-direction:column;gap:10px;}
.base-float-btn{background:linear-gradient(135deg,var(--base-violet),var(--base-signal));
  color:#fff;border:none;border-radius:24px;padding:10px 16px;font-size:14px;cursor:pointer;
  box-shadow:0 6px 18px rgba(34,211,238,.35);white-space:nowrap;}
.base-float-btn:hover{filter:brightness(1.1);}
.base-card-overlay{position:fixed;inset:0;background:rgba(4,10,20,.8);z-index:90;
  display:flex;align-items:center;justify-content:center;padding:20px;}
.base-card-overlay[hidden]{display:none;}
.base-card-box{position:relative;background:#fff;border-radius:12px;padding:10px;}
.base-card-img{max-height:80vh;width:auto;display:block;}
.base-card-close{position:absolute;top:-14px;right:-14px;background:var(--base-gold);color:#111;
  border:none;border-radius:50%;width:34px;height:34px;cursor:pointer;font-weight:700;}

/* ===== 页脚 ===== */
.base-footer{background:var(--base-surface);border-top:1px solid var(--base-line);margin-top:40px;}
.base-footer-inner{max-width:var(--maxw);margin:0 auto;padding:32px 20px;display:grid;
  grid-template-columns:1.4fr 2fr;gap:30px;}
.base-foot-logo{font-weight:800;font-size:18px;color:#fff;}
.base-foot-desc{color:var(--base-muted);font-size:14px;line-height:1.8;margin-top:10px;}
.base-foot-cols{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.base-foot-title{font-size:15px;color:var(--base-signal);margin:0 0 10px;}
.base-foot-col ul{list-style:none;padding-left:0;margin:0;}
.base-foot-col li{margin:6px 0;}
.base-foot-col a{color:var(--base-muted);font-size:14px;}
.base-foot-col a:hover{color:var(--base-signal);}
.base-footer-bottom{max-width:var(--maxw);margin:0 auto;padding:14px 20px;border-top:1px solid var(--base-line);
  color:var(--base-muted);font-size:13px;}

/* ===== 响应式折叠（[M25] 手机端 ≤1024 不隐藏，仅收起） ===== */
@media (max-width:1024px){
  .base-nav{display:none;}
  .base-nav.base-nav-open{display:block;position:absolute;top:var(--head-h);left:0;right:0;
    background:var(--base-surface);border-bottom:1px solid var(--base-line);padding:10px;}
  .base-nav.base-nav-open .base-nav-list{flex-direction:column;align-items:stretch;}
  .base-nav.base-nav-open .base-nav-sub{position:static;display:block;box-shadow:none;border:none;padding-left:14px;}
  .base-nav-toggle{display:block;}
  .base-layout{grid-template-columns:1fr;}
  .base-toc-aside{position:static;max-height:none;margin-top:20px;}
  .base-list-layout{grid-template-columns:1fr;}
  .base-cat-side{position:static;margin-bottom:18px;}
  .base-hero{padding:36px 22px;}
  .base-hero-title{font-size:30px;}
  .base-footer-inner{grid-template-columns:1fr;}
  .base-archive-list{columns:1;}
}