:root{
  --bg:#eef3fb;
  --bg-2:#f7fafe;
  --ink:#0b1f3a;
  --ink-2:#33445f;
  --muted:#6b7c95;
  --line:#cbd5e1;
  --accent:#16d0c0;
  --accent-2:#2f8bff;
  --accent-3:#0b6bff;
  --card:#ffffff;
  --shadow:0 10px 30px rgba(11,31,58,.08);
  --radius:14px;
  --header-h:64px;
  --h2-inset:16px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;font-family:"Segoe UI","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  color:var(--ink);background:
    radial-gradient(1200px 600px at 80% -10%,rgba(47,139,255,.12),transparent 60%),
    radial-gradient(900px 500px at -10% 10%,rgba(22,208,192,.12),transparent 55%),
    var(--bg);
  line-height:1.75;padding-top:var(--header-h);
}
a{color:var(--accent-3);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%}
.container{max-width:1200px;margin:0 auto;padding:0 var(--h2-inset)}
h1,h2,h3,h4{color:var(--ink);line-height:1.3}
code{background:#e7eefb;padding:.1em .4em;border-radius:6px;font-size:.9em;color:#0b3a82}

/* ===== 头部固定导航 ===== */
.site-header{position:fixed;top:0;left:0;right:0;height:var(--header-h);z-index:50;
  background:rgba(255,255,255,.85);backdrop-filter:blur(10px);
  border-bottom:1px solid rgba(203,213,225,.6);box-shadow:0 2px 14px rgba(11,31,58,.06)}
.header-inner{max-width:1200px;margin:0 auto;height:100%;display:flex;align-items:center;gap:18px;padding:0 16px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--ink)}
.brand-mark{background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff;
  padding:4px 10px;border-radius:10px;letter-spacing:1px;font-size:15px}
.brand-name{font-size:16px}
.site-nav{display:flex;align-items:center;gap:6px;margin-left:auto}
.site-nav>a,.site-nav .nav-cat>summary{color:var(--ink-2);padding:8px 12px;border-radius:10px;cursor:pointer;
  font-size:15px;list-style:none;user-select:none}
.site-nav>a:hover,.site-nav .nav-cat>summary:hover{background:#eef4ff;color:var(--accent-3);text-decoration:none}
.nav-cat{position:relative}
.nav-cat .cat-flyout{position:absolute;top:100%;left:0;background:#fff;border:1px solid var(--line);
  border-radius:12px;box-shadow:var(--shadow);padding:8px;display:none;grid-template-columns:1fr 1fr;gap:2px;min-width:320px}
.nav-cat[open] .cat-flyout{display:grid}
.nav-cat .cat-flyout a{display:block;padding:8px 12px;border-radius:8px;white-space:nowrap}
.nav-cat .cat-flyout a:hover{background:#eef4ff}
.nav-toggle{display:none}
.nav-burger{display:none}

/* ===== 面包屑（左缘对齐正文 H2）===== */
.breadcrumb{margin:18px 0 10px;font-size:13px;color:var(--muted)}
.breadcrumb ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px;margin:0;padding:0}
.breadcrumb li.sep{color:var(--line)}
.breadcrumb a{color:var(--accent-3)}

/* ===== 布局网格 ===== */
.layout-grid{display:grid;grid-template-columns:minmax(0,1fr) 240px;gap:32px;align-items:start}
.content-main{max-width:820px}
.post-title{font-size:30px;margin:.2em 0 .3em}
.post-meta{color:var(--muted);font-size:13px;margin:0 0 18px}
.post-body{font-size:16px}
.post-body h2{font-size:22px;margin:1.6em 0 .6em;padding-left:12px;border-left:4px solid var(--accent)}
.post-body h3{font-size:18px;margin:1.3em 0 .5em;color:var(--accent-3)}
.post-body p{margin:.7em 0}
.post-body ul,.post-body ol{padding-left:1.4em;margin:.6em 0}
.post-body blockquote{margin:1em 0;padding:12px 16px;background:#eef4ff;border-left:4px solid var(--accent-2);border-radius:0 10px 10px 0;color:var(--ink-2)}
.post-body hr{border:none;border-top:1px solid var(--line);margin:1.6em 0}
.tag-text{display:inline-block;background:#e7eefb;color:#0b3a82;border-radius:999px;padding:2px 10px;font-size:12px;margin-right:6px}

/* 表格边框全覆盖（含 Markdown 裸 table） */
.content-main table,.page-main table,table.data{border-collapse:collapse;width:100%;margin:1em 0;font-size:14px;
  border:1px solid var(--line)}
.content-main table th,.page-main table th,table.data th{background:linear-gradient(135deg,var(--accent-2),var(--accent-3));
  color:#fff;text-align:left;padding:9px 12px;border:1px solid var(--line)}
.content-main table td,.page-main table td,table.data td{padding:8px 12px;border:1px solid var(--line)}
.content-main table tbody tr:nth-child(even),.page-main table tbody tr:nth-child(even),table.data tbody tr:nth-child(even){background:#f3f7fd}

/* TOC 吸附 */
.toc-aside{position:sticky;top:calc(var(--header-h) + 16px);max-height:calc(100vh - 100px);overflow:auto}
.toc-panel,.cat-panel{border:1px solid var(--line);border-radius:12px;background:var(--card);box-shadow:var(--shadow)}
.toc-panel>summary,.cat-panel>summary{list-style:none;cursor:pointer;padding:12px 14px;font-weight:700;color:var(--ink);
  display:flex;align-items:center;justify-content:space-between}
.toc-panel>summary::after,.cat-panel>summary::after{content:"▾";color:var(--accent-3);transition:transform .2s}
.toc-panel[open]>summary::after,.cat-panel[open]>summary::after{transform:rotate(180deg)}
.toc-nav{display:flex;flex-direction:column;padding:0 12px 12px}
.toc-nav a{padding:5px 0;color:var(--ink-2);border-bottom:1px dashed #e3eaf4;font-size:13px}
.toc-nav a:hover{color:var(--accent-3)}
.toc-lv3{padding-left:14px!important;font-size:12px!important;color:var(--muted)!important}

/* FAQ / 相关阅读 / 案例 */
.faq-block{margin:1.8em 0}
.faq-title{font-size:20px;border-left:4px solid var(--accent);padding-left:12px}
.faq-item{border:1px solid var(--line);border-radius:12px;margin:.5em 0;background:var(--card);overflow:hidden}
.faq-item>summary{cursor:pointer;padding:12px 14px;font-weight:600;list-style:none}
.faq-item>summary::-webkit-details-marker{display:none}
.faq-a{padding:0 14px 12px;color:var(--ink-2)}
.related-block{margin:1.8em 0;padding:14px 16px;background:#eef4ff;border-radius:12px}
.related-title{font-size:18px;margin:.2em 0 .6em}
.related-list{margin:0;padding-left:1.2em}
.related-list a{font-weight:600}
.case-callout{margin:1.4em 0;padding:14px 16px;border:1px solid #bfe9e3;background:#e9fbf8;border-radius:12px;color:var(--ink-2)}

/* ===== 列表 / 分类页 ===== */
.list-layout .layout-grid{grid-template-columns:240px minmax(0,1fr)}
.cat-side{width:240px}
.category-list{list-style:none;margin:0;padding:8px}
.category-list li{margin:2px 0}
.category-list a{display:block;padding:9px 12px;border-radius:9px;color:var(--ink-2);font-size:14px}
.category-list a:hover,.category-list a.active{background:linear-gradient(135deg,rgba(22,208,192,.16),rgba(47,139,255,.16));color:var(--accent-3)}
.list-title{font-size:26px;margin:.2em 0 .4em}
.cat-desc{color:var(--muted);margin-bottom:14px}
.card-list{display:grid;gap:14px}
.card-list.three{grid-template-columns:repeat(3,1fr)}
.list-card{border:1px solid var(--line);border-radius:14px;background:var(--card);padding:16px 18px;box-shadow:var(--shadow);transition:transform .15s,border-color .15s}
.list-card:hover{transform:translateY(-3px);border-color:var(--accent)}
.list-card h2{font-size:17px;margin:0 0 .4em}
.list-card h2 a{color:var(--ink)}
.list-card p{margin:0;color:var(--ink-2);font-size:14px}
.card-meta{color:var(--muted);font-size:12px;margin-top:8px!important}

/* ===== 页面（叶子）===== */
.page-wrap{max-width:900px;margin:0 auto;padding:0 48px}
.page-main{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:28px 32px;box-shadow:var(--shadow);margin:10px 0 30px}
.archive-list{columns:2;gap:24px}
.archive-list li{break-inside:avoid;margin-bottom:6px}
.muted{color:var(--muted)}

/* ===== 首页 ===== */
.hero{background:linear-gradient(135deg,#0b1f3a,#103a6b 60%,#0b6bff);color:#fff;padding:60px 0 70px;position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;inset:0;background:
  radial-gradient(600px 300px at 90% 20%,rgba(22,208,192,.35),transparent 60%),
  repeating-linear-gradient(115deg,rgba(255,255,255,.05) 0 2px,transparent 2px 22px);pointer-events:none}
.hero-inner{position:relative;z-index:1}
.hero-kicker{letter-spacing:3px;color:var(--accent);font-weight:700;margin:0 0 8px}
.hero-title{font-size:42px;margin:0 0 12px;color:#fff;text-shadow:0 2px 16px rgba(3,16,36,.45)}
.hero-sub{max-width:720px;color:#eef5ff;font-size:17px;margin:0 0 22px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.btn-primary{background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#04263a;font-weight:700;
  padding:11px 22px;border-radius:999px;box-shadow:0 8px 22px rgba(22,208,192,.35)}
.btn-primary:hover{text-decoration:none;filter:brightness(1.05)}
.btn-ghost{border:1px solid rgba(255,255,255,.6);color:#fff;padding:11px 22px;border-radius:999px}
.btn-ghost:hover{background:rgba(255,255,255,.12);text-decoration:none}
.band{max-width:1200px;margin:30px auto;padding:0 16px}
.band-title{font-size:24px;margin:10px 0 16px}
.cat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.cat-card{display:flex;align-items:center;justify-content:space-between;padding:18px 20px;border-radius:14px;
  background:var(--card);border:1px solid var(--line);box-shadow:var(--shadow);color:var(--ink);font-weight:700}
.cat-card:hover{text-decoration:none;border-color:var(--accent);transform:translateY(-2px)}
.cat-card.alt{border-left:4px solid var(--accent)}
.cat-card-name{font-size:16px}
.cat-card-go{color:var(--accent-3);font-size:13px}

/* ===== 首页平台简介 ===== */
.intro-band{margin-top:26px}
.intro-lead{max-width:920px;color:#1c2d45;font-size:16px;line-height:1.9;margin:0 0 20px}
.intro-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.intro-item{background:var(--card);border:1px solid var(--line);box-shadow:var(--shadow);
  border-radius:14px;padding:18px 20px;border-top:3px solid var(--accent)}
.intro-item h3{margin:0 0 8px;font-size:16px;color:var(--accent-3)}
.intro-item p{margin:0;color:#27384f;font-size:14px;line-height:1.8}

/* ===== 页脚 ===== */
.site-footer{background:#0b1f3a;color:#cdd9ec;margin-top:40px;padding:36px 0 18px}
.footer-inner{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:2fr 1fr 1fr;gap:24px;padding:0 16px}
.footer-col h3{color:#fff;font-size:18px;margin:0 0 10px}
.footer-col h4{color:#9fc0e8;font-size:14px;margin:0 0 8px}
.footer-col a{display:block;color:#cdd9ec;font-size:14px;padding:3px 0}
.footer-col a:hover{color:var(--accent)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);margin-top:18px;padding:14px 16px 0;text-align:center;color:#8aa0c0;font-size:13px}

/* ===== 悬浮工具胶囊 ===== */
.float-capsule{position:fixed;right:18px;top:50%;transform:translateY(-50%);z-index:60;
  display:flex;flex-direction:column;gap:10px}
.cap-btn{width:54px;height:54px;border:none;border-radius:999px;cursor:pointer;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#04263a;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  box-shadow:0 8px 22px rgba(47,139,255,.4);font-weight:700;font-size:12px;line-height:1.1}
.cap-btn:hover{filter:brightness(1.06);text-decoration:none}
.cap-ico{font-size:18px}
.cap-txt{font-size:11px}

/* 名片弹窗 */
.wecom-modal[hidden]{display:none}
.wecom-modal{position:fixed;inset:0;z-index:80;background:rgba(11,31,58,.55);display:flex;align-items:center;justify-content:center}
.wecom-box{position:relative;background:#fff;border-radius:14px;padding:10px;box-shadow:0 20px 60px rgba(0,0,0,.35)}
.wecom-box img{display:block;border-radius:8px}
.wecom-close{position:absolute;top:-14px;right:-14px;width:34px;height:34px;border-radius:50%;border:none;
  background:#0b1f3a;color:#fff;font-size:20px;cursor:pointer;line-height:1}

.notfound{text-align:center;padding:60px 16px}

/* ===== 响应式：≤1024 折叠 + 单列 ===== */
@media (max-width:1024px){
  .layout-grid,.list-layout .layout-grid{grid-template-columns:1fr}
  .toc-aside{position:static;max-height:none}
  .cat-side{width:auto}
  .card-list.three{grid-template-columns:1fr}
  .cat-grid{grid-template-columns:1fr 1fr}
  .intro-grid{grid-template-columns:1fr 1fr}
  .archive-list{columns:1}
  .page-wrap{padding:0 16px}
  /* 导航折叠为汉堡 */
  .nav-burger{display:flex;flex-direction:column;gap:4px;margin-left:auto;cursor:pointer;padding:8px}
  .nav-burger span{width:22px;height:2px;background:var(--ink);border-radius:2px}
  .site-nav{position:fixed;top:var(--header-h);left:0;right:0;flex-direction:column;align-items:stretch;
    background:#fff;border-bottom:1px solid var(--line);padding:10px 16px;gap:4px;display:none}
  .nav-toggle:checked ~ .site-nav{display:flex}
  .nav-cat .cat-flyout{position:static;display:grid;grid-template-columns:1fr 1fr;box-shadow:none;border:none;padding:4px 0}
}
@media (max-width:560px){
  .cat-grid{grid-template-columns:1fr}
  .intro-grid{grid-template-columns:1fr}
  .footer-inner{grid-template-columns:1fr}
  .hero-title{font-size:30px}
}