:root{
  --bg:#f4f7fb; --panel:#ffffff; --ink:#0e1b2e; --muted:#5b6b80;
  --brand:#1f5cff; --brand2:#00c2ff; --line:#e4eaf2; --accent:#0b1f3a;
  --radius:14px; --shadow:0 8px 30px rgba(15,30,60,.08);
  --maxw:1180px; --h2-inset:16px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0; background:var(--bg); color:var(--ink);
  font-family:"PingFang SC","Microsoft YaHei","Segoe UI",system-ui,sans-serif;
  line-height:1.75; font-size:16px; -webkit-font-smoothing:antialiased;
}
a{color:var(--brand); text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%}
h1,h2,h3,h4{color:var(--accent); line-height:1.35; font-weight:700}
h1{font-size:30px; margin:.2em 0 .6em}
h2{font-size:23px; margin:1.6em 0 .7em}
h3{font-size:19px; margin:1.2em 0 .5em}

/* ===== Header ===== */
.site-header{position:sticky; top:0; z-index:50; background:rgba(255,255,255,.9);
  backdrop-filter:blur(10px); border-bottom:1px solid var(--line)}
.header-inner{max-width:var(--maxw); margin:0 auto; padding:12px 20px;
  display:flex; align-items:center; gap:24px}
.brand{display:flex; align-items:center; gap:10px; font-weight:800; color:var(--accent)}
.brand-mark{width:34px; height:34px; border-radius:9px; display:grid; place-items:center;
  background:linear-gradient(135deg,var(--brand),var(--brand2)); color:#fff; font-size:18px}
.brand-text{font-size:18px; letter-spacing:.5px}
.main-nav{margin-left:auto; display:flex; gap:22px; flex-wrap:wrap}
.main-nav a{color:var(--ink); font-weight:600; font-size:15px; padding:6px 2px; position:relative}
.main-nav a:hover{color:var(--brand); text-decoration:none}
.main-nav a::after{content:""; position:absolute; left:0; bottom:-2px; width:0; height:2px;
  background:var(--brand); transition:width .2s}
.main-nav a:hover::after{width:100%}
.nav-toggle{display:none; background:none; border:1px solid var(--line); border-radius:8px;
  font-size:20px; padding:4px 10px; cursor:pointer}

/* ===== Container / layout ===== */
.container{max-width:var(--maxw); margin:0 auto; padding:24px 20px 60px}
.breadcrumb{font-size:13px; color:var(--muted); margin:6px 0 18px; padding-left:var(--h2-inset)}
.breadcrumb ol{list-style:none; display:flex; flex-wrap:wrap; gap:6px; margin:0; padding:0}
.breadcrumb li::after{content:"›"; margin-left:6px; color:#b9c4d4}
.breadcrumb li:last-child::after{content:""}
.breadcrumb a{color:var(--muted)}
.cols{display:grid; grid-template-columns:minmax(0,1fr) 240px; gap:36px; align-items:start}
.main-content{min-width:0}

/* ===== Article / product body ===== */
.article-body,.product-body,.page-body{background:var(--panel); border:1px solid var(--line);
  border-radius:var(--radius); padding:30px 34px; box-shadow:var(--shadow)}
.article-body>p,.product-body>p,.page-body>p{margin:.6em 0}
.article-body ul,.product-body ul,.page-body ul,.article-body ol,.product-body ol{padding-left:1.4em}
blockquote{background:#eef4ff; border-left:4px solid var(--brand); margin:1em 0; padding:12px 16px;
  border-radius:0 8px 8px 0; color:#22324a}
.updated-line{margin-top:24px; font-size:13px; color:var(--muted)}
.updated-line time{font-variant-numeric:tabular-nums}

/* tables —— 覆盖正文内所有 markdown 表格（含未带 .data 的裸 table） */
.article-body table,.product-body table,.page-body table,table.data{width:100%; border-collapse:collapse; margin:1.1em 0; font-size:15px;
  background:#fff; border:1px solid var(--line); border-radius:10px; overflow:hidden}
.article-body table th,.article-body table td,.product-body table th,.product-body table td,
.page-body table th,.page-body table td,table.data th,table.data td{border:1px solid var(--line); padding:9px 12px; text-align:left; vertical-align:top}
.article-body table thead th,.product-body table thead th,.page-body table thead th,table.data thead th{background:linear-gradient(135deg,#eaf1ff,#f6fbff); color:var(--accent); font-weight:700}
.article-body table tbody tr:nth-child(even),.product-body table tbody tr:nth-child(even),.page-body table tbody tr:nth-child(even),table.data tbody tr:nth-child(even){background:#f8fbff}

/* FAQ */
.faq-block{margin-top:28px; border-top:1px dashed var(--line); padding-top:18px}
.faq-title{font-size:21px}
.faq-item{border:1px solid var(--line); border-radius:10px; margin:10px 0; background:#fbfdff; overflow:hidden}
.faq-item summary{cursor:pointer; padding:12px 16px; font-weight:700; color:var(--accent); list-style:none}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::before{content:"+"; display:inline-block; width:18px; color:var(--brand); font-weight:900}
.faq-item[open] summary::before{content:"−"}
.faq-a{padding:0 16px 14px; color:#2a3a52}

/* TOC */
.toc-aside{position:sticky; top:88px; max-height:calc(100vh - 110px); overflow:auto;
  background:var(--panel); border:1px solid var(--line); border-radius:var(--radius);
  padding:16px 18px; box-shadow:var(--shadow); font-size:14px}
.toc-title{font-weight:800; color:var(--accent); margin-bottom:10px}
.toc-aside ul{list-style:none; margin:0; padding:0}
.toc-aside li{margin:6px 0}
.toc-l3{padding-left:14px; font-size:13px; color:var(--muted)}
.toc-aside a{color:#33445e}

/* ===== List pages ===== */
.list-cols{display:grid; grid-template-columns:240px minmax(0,1fr); gap:36px; align-items:start}
.cat-toggle{display:none}
.cat-side{background:var(--panel); border:1px solid var(--line); border-radius:var(--radius);
  padding:18px; box-shadow:var(--shadow); align-self:start; position:sticky; top:88px}
.cat-side-title{font-size:16px; margin:0 0 10px}
.category-list{list-style:none; margin:0; padding:0}
.category-list li{margin:2px 0}
.category-list a{display:block; padding:9px 12px; border-radius:9px; color:var(--ink); font-weight:600}
.category-list a:hover{background:#eef4ff; text-decoration:none}
.category-list li.active a{background:linear-gradient(135deg,var(--brand),var(--brand2)); color:#fff}
.cat-content{min-width:0}
.list-title{font-size:26px}
.item-list{list-style:none; margin:0; padding:0; display:grid; gap:14px}
.item-card{background:var(--panel); border:1px solid var(--line); border-radius:12px; box-shadow:var(--shadow); transition:transform .15s}
.item-card:hover{transform:translateY(-2px)}
.item-link{display:block; padding:16px 18px}
.item-cat{display:inline-block; font-size:12px; color:var(--brand); background:#eaf1ff;
  padding:2px 8px; border-radius:20px; margin-bottom:6px}
.item-name{display:block; font-size:17px; font-weight:700; color:var(--accent)}
.item-sum{display:block; color:var(--muted); font-size:14px; margin-top:4px}
.item-date{display:block; font-size:12px; color:#9aa7ba; margin-top:6px}
.cat-toggle{display:none}

/* ===== Home ===== */
.hero{background:radial-gradient(1200px 500px at 70% -10%,#103a7a 0%,#0b1f3a 55%,#08152b 100%);
  color:#fff; padding:78px 20px 70px}
.hero-inner{max-width:var(--maxw); margin:0 auto}
.hero-kicker{letter-spacing:3px; color:var(--brand2); font-size:13px; font-weight:700; margin:0 0 12px}
.hero-title{font-size:42px; line-height:1.25; margin:0 0 18px; color:#fff}
.hero-sub{max-width:760px; color:#cfe0f5; font-size:17px; margin:0 0 26px}
.hero-cta{display:flex; gap:14px; flex-wrap:wrap}
.btn-primary{display:inline-block; background:linear-gradient(135deg,var(--brand),var(--brand2));
  color:#fff; padding:12px 26px; border-radius:30px; font-weight:700; border:none; cursor:pointer}
.btn-primary:hover{color:#fff; text-decoration:none; filter:brightness(1.05)}
.btn-ghost{display:inline-block; border:1px solid rgba(255,255,255,.4); color:#fff;
  padding:12px 26px; border-radius:30px; font-weight:700}
.btn-ghost:hover{color:#fff; border-color:#fff; text-decoration:none}
.sec-title{font-size:26px; text-align:center; margin:0 0 28px}
.domains{padding:56px 20px; max-width:var(--maxw); margin:0 auto}
.domain-grid{display:grid; grid-template-columns:repeat(4,1fr); gap:18px}
.domain{background:var(--panel); border:1px solid var(--line); border-radius:var(--radius);
  padding:22px; box-shadow:var(--shadow)}
.domain .dnum{font-size:13px; color:var(--brand); font-weight:800; letter-spacing:1px}
.domain h3{font-size:17px; margin:8px 0 8px}
.domain p{margin:0; color:var(--muted); font-size:14px}
.process{padding:30px 20px 60px; max-width:var(--maxw); margin:0 auto}
.flow{list-style:none; counter-reset:step; margin:0; padding:0; display:grid; gap:14px}
.flow li{counter-increment:step; background:var(--panel); border:1px solid var(--line);
  border-radius:12px; padding:16px 18px 16px 64px; position:relative; box-shadow:var(--shadow)}
.flow li::before{content:counter(step); position:absolute; left:18px; top:16px; width:32px; height:32px;
  border-radius:50%; background:linear-gradient(135deg,var(--brand),var(--brand2)); color:#fff;
  display:grid; place-items:center; font-weight:800}
.flow strong{display:block; color:var(--accent)}
.flow span{color:var(--muted); font-size:14px}
.featured{padding:20px 20px 50px; max-width:var(--maxw); margin:0 auto;
  display:grid; grid-template-columns:1fr 1fr; gap:30px}
.feat-list{list-style:none; margin:0; padding:0}
.feat-list li{padding:14px 0; border-bottom:1px solid var(--line)}
.feat-list a{font-weight:700; color:var(--accent); font-size:16px}
.feat-list p{margin:4px 0 0; color:var(--muted); font-size:14px}
.cta-band{background:linear-gradient(135deg,#0b1f3a,#103a7a); color:#fff; text-align:center;
  padding:50px 20px; margin:0 20px 40px; border-radius:20px}
.cta-band h2{color:#fff}
.cta-band p{color:#cfe0f5; max-width:620px; margin:0 auto 18px}
.cta-band .btn-primary{font-size:16px; padding:14px 30px}

/* ===== Footer ===== */
.site-footer{background:var(--accent); color:#cdd9ea; margin-top:40px}
.footer-inner{max-width:var(--maxw); margin:0 auto; padding:40px 20px; display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.2fr; gap:24px}
.footer-col h3,.footer-col h4{color:#fff; margin:0 0 12px}
.footer-col ul{list-style:none; margin:0; padding:0}
.footer-col li{margin:6px 0}
.footer-col a{color:#bcd0ea}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12); text-align:center; padding:16px;
  font-size:13px; color:#90a4c0}

/* ===== Floating capsule ===== */
.float-capsule{position:fixed; left:18px; top:50%; transform:translateY(-50%); z-index:60;
  display:flex; flex-direction:column; gap:10px}
.float-btn{width:48px; height:48px; border-radius:30px; border:1px solid var(--line);
  background:#fff; box-shadow:var(--shadow); cursor:pointer; display:flex; flex-direction:column;
  align-items:center; justify-content:center; gap:1px; color:var(--accent)}
.float-btn .ic{font-size:16px; font-weight:800; color:var(--brand)}
.float-btn .lb{font-size:10px; color:var(--muted)}
.float-btn:hover{border-color:var(--brand)}
.wechat-overlay{position:fixed; inset:0; background:rgba(8,18,33,.7); z-index:90;
  display:grid; place-items:center}
.wechat-overlay[hidden]{display:none}
.wechat-box{position:relative; background:#fff; border-radius:12px; padding:8px;
  box-shadow:0 20px 60px rgba(0,0,0,.4)}
.wechat-box img{display:block; width:300px; height:500px; border-radius:6px}
.wechat-close{position:absolute; top:-14px; right:-14px; width:34px; height:34px; border-radius:50%;
  border:none; background:#fff; color:#0b1f3a; font-size:22px; cursor:pointer; box-shadow:var(--shadow)}

/* ===== Responsive ===== */
@media (max-width:960px){
  .cols{grid-template-columns:1fr}
  .list-cols{grid-template-columns:1fr}
  .cat-side{position:static}
  .toc-aside{position:static; max-height:none; margin-top:20px}
  .domain-grid{grid-template-columns:repeat(2,1fr)}
  .featured{grid-template-columns:1fr}
  .footer-inner{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  .main-nav{display:none; position:absolute; top:60px; left:0; right:0; background:#fff;
    flex-direction:column; padding:12px 20px; border-bottom:1px solid var(--line)}
  .main-nav.open{display:flex}
  .nav-toggle{display:block; margin-left:auto}
  .hero-title{font-size:30px}
  .domain-grid{grid-template-columns:1fr}
  .footer-inner{grid-template-columns:1fr}
  .article-body,.product-body,.page-body{padding:20px 16px}
  /* 移动端：文章/产品分类默认折叠 */
  .cat-side{position:static; margin-bottom:14px}
  .cat-toggle{display:inline-block; margin-bottom:8px; background:var(--brand); color:#fff;
    border:none; border-radius:8px; padding:8px 14px; cursor:pointer}
  .category-list.collapsed{display:none}
  .float-capsule{left:10px}
}