:root{
  --navy:#0b2545; --navy-2:#13315c; --cyan:#00b4d8; --cyan-soft:#48cae4;
  --ink:#1f2933; --muted:#5b6b7b; --line:#cbd5e1; --bg:#f5f8fc; --white:#fff;
  --h2-inset:0px; --header-h:60px; --radius:10px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.7;font-size:16px}
a{color:var(--navy-2);text-decoration:none}
a:hover{color:var(--cyan)}

/* 顶部固定导航 */
.masthead{position:fixed;top:0;left:0;right:0;height:var(--header-h);background:rgba(11,37,69,.96);
  backdrop-filter:blur(6px);z-index:1000;box-shadow:0 2px 12px rgba(0,0,0,.18)}
.masthead-inner{max-width:1180px;margin:0 auto;height:100%;padding:0 20px;display:flex;align-items:center;gap:18px}
.brand{color:#fff;font-weight:700;font-size:18px;white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:6px;flex:1;flex-wrap:wrap}
.main-nav>a,.nav-group>a{color:#dbe7f5;padding:8px 10px;border-radius:8px;font-size:14px}
.main-nav>a:hover,.nav-group>a:hover{background:rgba(72,202,228,.18);color:#fff}
.nav-group{position:relative;display:flex;align-items:center}
.nav-sub{display:none;position:absolute;top:100%;left:0;background:var(--navy-2);border-radius:8px;
  padding:8px;min-width:160px;flex-direction:column;box-shadow:0 8px 24px rgba(0,0,0,.25)}
.nav-group:hover .nav-sub{display:flex}
.nav-sub a{color:#dbe7f5;padding:6px 10px;font-size:13px}
.nav-toggle{display:none;background:var(--cyan);color:#04293a;border:none;border-radius:8px;
  padding:8px 14px;font-weight:700;cursor:pointer}

/* 主体布局 */
main{padding-top:var(--header-h)}
.article-layout,.list-layout{max-width:1180px;margin:0 auto}
.layout-grid{display:grid;grid-template-columns:minmax(0,1fr) 240px;gap:44px;padding:28px 20px 60px}
.list-grid{grid-template-columns:240px minmax(0,1fr)}
.content-col{min-width:0;padding:0}
.entry{max-width:none}
.page-wrap{max-width:880px;margin:0 auto;padding:28px 20px 60px}
.page-main{padding:0}

/* 面包屑：与正文 H2 左缘严格对齐（同一栅格列、无左缩进） */
.breadcrumb{margin:0 0 18px;padding:0}
.crumb-list{list-style:none;display:flex;flex-wrap:wrap;align-items:center;gap:6px;margin:0;padding:0;font-size:13px;color:var(--muted)}
.crumb-list li{display:flex;align-items:center;gap:6px}
.crumb-list a{color:var(--muted)}
.crumb-list a:hover{color:var(--cyan)}
.crumb-list .current span{color:var(--navy-2);font-weight:600}
.crumb-list .sep{color:#9fb3c8}

/* 正文排版 */
.detail-h1{font-size:30px;line-height:1.3;margin:0 0 18px;color:var(--navy)}
.entry h1{font-size:30px;line-height:1.3;margin:0 0 18px;color:var(--navy)}
.entry h2{font-size:22px;margin:34px 0 12px;color:var(--navy-2);border-left:4px solid var(--cyan);padding-left:12px}
.entry h3{font-size:18px;margin:24px 0 10px;color:var(--navy-2)}
.entry p{margin:0 0 14px}
.entry ul,.entry ol{margin:0 0 14px;padding-left:22px}
.entry li{margin:6px 0}
.entry blockquote{margin:16px 0;padding:12px 16px;background:#eef6fb;border-left:4px solid var(--cyan);border-radius:8px;color:var(--navy-2)}
.entry code{background:#eef2f7;padding:2px 6px;border-radius:5px;font-size:14px}
.entry img{max-width:100%;height:auto;border-radius:8px}

/* 表格：清晰边框覆盖全部正文表格（含 Markdown 裸 table） */
.entry table,.page-main table,.data{border-collapse:collapse;width:100%;margin:16px 0;font-size:14px;
  border:1px solid var(--line)}
.entry table th,.entry table td,.page-main table th,.page-main table td,.data th,.data td{
  border:1px solid var(--line);padding:9px 12px;text-align:left}
.entry table thead th,.page-main table thead th,.data thead th{background:var(--navy);color:#fff;font-weight:600}
.entry table tbody tr:nth-child(even),.page-main table tbody tr:nth-child(even),.data tbody tr:nth-child(even){background:#f1f6fb}

/* 右侧 TOC */
.toc-aside{position:sticky;top:calc(var(--header-h) + 20px);align-self:start;max-height:calc(100vh - 100px);overflow:auto}
.toc-panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:12px 14px}
.toc-panel summary{cursor:pointer;font-weight:700;color:var(--navy);margin-bottom:8px;list-style:none}
.toc-panel summary::-webkit-details-marker{display:none}
.toc-panel summary::after{content:"▾";float:right;color:var(--cyan)}
.toc-panel:not([open]) summary::after{content:"▸"}
.toc-nav{list-style:none;margin:0;padding:0}
.toc-nav li{margin:4px 0}
.toc-nav .lvl-3{padding-left:14px;font-size:13px}
.toc-nav a{color:var(--muted);font-size:14px}
.toc-nav a:hover{color:var(--cyan)}

/* FAQ */
.faq-block{margin-top:36px}
.faq-block h2{font-size:22px;color:var(--navy-2);border-left:4px solid var(--cyan);padding-left:12px}
.faq-item{border:1px solid var(--line);border-radius:8px;margin:10px 0;background:#fff;overflow:hidden}
.faq-item summary{cursor:pointer;padding:12px 16px;font-weight:600;color:var(--navy-2);list-style:none}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";float:right;color:var(--cyan);font-weight:700}
.faq-item[open] summary::after{content:"−"}
.faq-a{padding:0 16px 14px;color:var(--ink)}

/* 列表页 */
.cat-side{position:sticky;top:calc(var(--header-h) + 20px);align-self:start}
.cat-panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:12px 14px}
.cat-panel summary{cursor:pointer;font-weight:700;color:var(--navy);margin-bottom:8px;list-style:none}
.cat-panel summary::-webkit-details-marker{display:none}
.cat-panel summary::after{content:"▾";float:right;color:var(--cyan)}
.cat-panel:not([open]) summary::after{content:"▸"}
.category-list{list-style:none;margin:0;padding:0}
.category-list li{margin:2px 0}
.category-list a{display:block;padding:8px 10px;border-radius:8px;color:var(--navy-2);font-size:14px}
.category-list a:hover{background:#eef6fb}
.category-list li.active a{background:var(--navy);color:#fff}
.list-title{font-size:26px;color:var(--navy);margin:0 0 18px}
.entry-list{list-style:none;margin:0;padding:0}
.entry-item{padding:16px 0;border-bottom:1px solid var(--line)}
.entry-item a{font-size:18px;font-weight:600;color:var(--navy-2)}
.entry-item p{margin:6px 0 0;color:var(--muted);font-size:14px}
.empty-tip{color:var(--muted)}

/* 首页 */
.home-wrap{max-width:1180px;margin:0 auto;padding:28px 20px 60px}
.hero{background:linear-gradient(135deg,var(--navy),var(--navy-2));color:#fff;border-radius:16px;padding:42px 36px;margin-bottom:30px}
.hero h1{margin:0 0 14px;font-size:32px}
.hero-sub{margin:0 0 22px;color:#cfe3f5;max-width:760px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-block;background:var(--cyan);color:#04293a;padding:12px 22px;border-radius:10px;font-weight:700}
.btn:hover{background:var(--cyan-soft);color:#04293a}
.btn-ghost{background:transparent;border:1px solid var(--cyan-soft);color:#fff}
.btn-ghost:hover{background:rgba(72,202,228,.15)}
.matrix{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px;margin-bottom:28px}
.sec-h{font-size:22px;color:var(--navy-2);margin:0 0 14px}
.cols{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.col-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px}
.col-card h3{margin:0 0 12px;color:var(--navy)}
.link-list{list-style:none;margin:0 0 12px;padding:0}
.link-list li{margin:8px 0}
.link-list a{color:var(--navy-2)}
.more{font-weight:600;color:var(--cyan)}

/* 页脚 */
.site-foot{background:var(--navy);color:#cfe3f5;margin-top:40px;padding:32px 20px}
.foot-inner{max-width:1180px;margin:0 auto}
.foot-brand{font-weight:700;color:#fff;font-size:18px}
.foot-nav{display:flex;flex-wrap:wrap;gap:14px;margin:12px 0}
.foot-nav a{color:#cfe3f5;font-size:14px}
.foot-note{font-size:13px;color:#9fb3c8;margin:8px 0 0;max-width:820px}

/* 悬浮胶囊 */
.cap-float{position:fixed;right:18px;top:50%;transform:translateY(-50%);z-index:900;display:flex;flex-direction:column;gap:10px}
.cap-btn{width:48px;height:48px;border:none;border-radius:24px;background:linear-gradient(135deg,var(--cyan),var(--navy-2));
  color:#fff;font-weight:700;font-size:13px;cursor:pointer;box-shadow:0 6px 18px rgba(0,0,0,.25);display:flex;align-items:center;justify-content:center;text-align:center}
.cap-btn:hover{filter:brightness(1.08)}
.cap-mail{text-decoration:none}

/* 名片弹窗 */
.card-modal{position:fixed;inset:0;background:rgba(4,20,38,.72);display:flex;align-items:center;justify-content:center;z-index:1200}
.card-modal[hidden]{display:none}
.card-modal-inner{position:relative;background:#fff;border-radius:12px;padding:8px;box-shadow:0 20px 60px rgba(0,0,0,.4)}
.card-img{display:block;width:300px;height:500px;object-fit:contain;border-radius:8px}
.card-close{position:absolute;top:-14px;right:-14px;width:34px;height:34px;border-radius:50%;border:none;background:#fff;color:var(--navy);font-size:20px;cursor:pointer;box-shadow:0 4px 12px rgba(0,0,0,.3)}

/* 移动端 */
@media (max-width:1024px){
  .layout-grid{grid-template-columns:1fr}
  .list-grid{grid-template-columns:1fr}
  .toc-aside,.cat-side{position:static;max-height:none;margin-top:18px}
}
@media (max-width:768px){
  .nav-toggle{display:block;margin-left:auto}
  .main-nav{display:none;position:absolute;top:var(--header-h);left:0;right:0;background:var(--navy);flex-direction:column;align-items:stretch;padding:10px 14px;gap:4px}
  .main-nav.open{display:flex}
  .nav-group{flex-direction:column;align-items:stretch}
  .nav-sub{position:static;display:flex;background:transparent;box-shadow:none;padding:0 0 0 12px}
  .nav-sub a{color:#cfe3f5}
  .cols{grid-template-columns:1fr}
  .hero{padding:28px 20px}
  .hero h1{font-size:24px}
  .cap-float{right:10px}
  .cap-btn{width:42px;height:42px}
}