:root{
  --bg:#070b16;
  --bg-2:#0b1220;
  --panel:rgba(18,28,48,.72);
  --panel-solid:#0e1626;
  --line:rgba(125,211,252,.16);
  --line-strong:rgba(125,211,252,.34);
  --text:#e6edf7;
  --muted:#9bb0c9;
  --muted-2:#6b809a;
  --cyan:#00d4ff;
  --blue:#2563eb;
  --accent-grad:linear-gradient(120deg,#00d4ff,#2563eb);
  --radius:16px;
  --maxw:1180px;
  --font:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font);color:var(--text);background:var(--bg);line-height:1.75;-webkit-font-smoothing:antialiased;font-size:16px}
a{color:var(--cyan);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}
.container{max-width:var(--maxw);margin:0 auto;padding:0 22px}

/* ===== 背景网格光晕 ===== */
.bg-fx{position:fixed;inset:0;z-index:-1;overflow:hidden}
.bg-fx::before,.bg-fx::after{content:"";position:absolute;width:60vw;height:60vw;border-radius:50%;filter:blur(120px);opacity:.35}
.bg-fx::before{background:radial-gradient(circle,#0b3a66,transparent 60%);top:-15vw;left:-10vw}
.bg-fx::after{background:radial-gradient(circle,#08305c,transparent 60%);bottom:-20vw;right:-12vw}
.bg-grid{position:fixed;inset:0;z-index:-1;background-image:linear-gradient(rgba(125,211,252,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(125,211,252,.05) 1px,transparent 1px);background-size:46px 46px;mask-image:radial-gradient(circle at 50% 20%,#000,transparent 80%)}

/* ===== 顶栏 ===== */
.site-header{position:sticky;top:0;z-index:60;background:rgba(7,11,22,.72);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;color:#fff}
.brand img{height:38px;display:block}
.nav-links{display:flex;gap:26px;align-items:center;list-style:none;margin:0;padding:0}
.nav-links a{color:var(--muted);font-weight:600;font-size:15px;position:relative;padding:6px 0}
.nav-links a::after{content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--accent-grad);transition:width .25s}
.nav-links a:hover{color:#fff;text-decoration:none}
.nav-links a:hover::after{width:100%}
.nav-toggle{display:none;background:none;border:1px solid var(--line-strong);color:#fff;border-radius:10px;padding:8px 12px;font-size:18px;cursor:pointer}
@media(max-width:860px){
  .nav-links{position:absolute;top:68px;left:0;right:0;flex-direction:column;gap:0;background:var(--panel-solid);border-bottom:1px solid var(--line);display:none}
  .nav-links.open{display:flex}
  .nav-links li{padding:0 22px}
  .nav-links a{display:block;padding:14px 0;border-bottom:1px solid var(--line)}
  .nav-toggle{display:block}
}

/* ===== 通用排版 ===== */
.section{padding:74px 0}
.section-sm{padding:46px 0}
.h-title{font-size:30px;font-weight:800;margin:0 0 8px;letter-spacing:-.5px}
.h-sub{color:var(--muted);margin:0 0 34px;font-size:15px}
.eyebrow{display:inline-block;color:var(--cyan);font-weight:700;letter-spacing:2px;font-size:12px;text-transform:uppercase;margin-bottom:10px}
.grad-text{background:var(--accent-grad);-webkit-background-clip:text;background-clip:text;color:transparent}

/* ===== 按钮 ===== */
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 24px;border-radius:999px;font-weight:700;font-size:15px;border:1px solid transparent;cursor:pointer;transition:.2s}
.btn-primary{background:var(--accent-grad);color:#04121f;box-shadow:0 10px 30px rgba(0,212,255,.25)}
.btn-primary:hover{text-decoration:none;transform:translateY(-2px);box-shadow:0 16px 40px rgba(0,212,255,.35)}
.btn-ghost{border-color:var(--line-strong);color:#fff;background:rgba(255,255,255,.03)}
.btn-ghost:hover{text-decoration:none;border-color:var(--cyan);color:#fff}

/* ===== 卡片 ===== */
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:26px;backdrop-filter:blur(8px);transition:.25s}
.card:hover{border-color:var(--line-strong);transform:translateY(-3px)}
.grid{display:grid;gap:20px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
@media(max-width:960px){.grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}}
.card h3{margin:0 0 10px;font-size:18px;color:#fff}
.card p{color:var(--muted);margin:0;font-size:15px}
.card .tag{display:inline-block;font-size:12px;color:var(--cyan);border:1px solid var(--line-strong);border-radius:999px;padding:3px 10px;margin-bottom:12px}

/* ===== Hero ===== */
.hero{padding:96px 0 70px;position:relative}
.hero h1{font-size:clamp(30px,5vw,52px);line-height:1.15;margin:14px 0 18px;font-weight:800;letter-spacing:-1px}
.hero p.lead{font-size:18px;color:var(--muted);max-width:680px;margin:0 0 30px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:54px}
.stat{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:20px}
.stat b{display:block;font-size:26px;background:var(--accent-grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat span{color:var(--muted-2);font-size:13px}
@media(max-width:760px){.stats{grid-template-columns:repeat(2,1fr)}}

/* ===== 面包屑 ===== */
.breadcrumb{font-size:13px;color:var(--muted-2);padding:16px 0 0}
.breadcrumb a{color:var(--muted)}
.breadcrumb span.sep{margin:0 8px;color:var(--muted-2)}

/* ===== 内容区（文章/产品） ===== */
.layout{display:grid;grid-template-columns:1fr 240px;gap:40px;align-items:start}
@media(max-width:980px){.layout{grid-template-columns:1fr}}
.content{max-width:760px;margin:0 auto;width:100%;font-size:15px;line-height:1.72}
.content h1{font-size:30px;margin:0 0 14px;color:#fff;line-height:1.25}
.content h2{font-size:21px;margin:34px 0 12px;padding-top:6px;color:#fff;scroll-margin-top:90px;line-height:1.35}
.content h3{font-size:17px;margin:24px 0 10px;color:#eaf2ff;scroll-margin-top:90px;line-height:1.4}
.content p{margin:0 0 14px;color:#d3deec}
.content ul,.content ol{margin:0 0 16px;padding-left:20px;color:#d3deec}
.content li{margin:7px 0}
.content blockquote{margin:16px 0;padding:12px 16px;border-left:3px solid var(--cyan);background:rgba(0,212,255,.06);border-radius:0 10px 10px 0;color:#cfe6f5;font-size:14px}
.content blockquote p{margin-bottom:8px}
.content blockquote p:last-child{margin-bottom:0}
.content .callout{border:1px solid var(--line-strong);background:rgba(37,99,235,.08);border-radius:12px;padding:16px 18px;margin:20px 0}
.content code{background:rgba(255,255,255,.07);padding:2px 6px;border-radius:6px;font-size:14px;color:#9be7ff}
.content table{width:100%;border-collapse:collapse;margin:18px 0 22px;font-size:14px;border-radius:12px}
.content table th,.content table td{border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top}
.content table thead th{background:rgba(0,212,255,.12);color:#eaf6ff;font-weight:700}
.content table tbody tr:nth-child(even){background:rgba(255,255,255,.02)}
table.data{width:100%;border-collapse:collapse;margin:18px 0 22px;font-size:14px;overflow:hidden;border-radius:12px}
table.data th,table.data td{border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top}
table.data thead th{background:rgba(0,212,255,.12);color:#eaf6ff;font-weight:700}
table.data tbody tr:nth-child(even){background:rgba(255,255,255,.02)}
.keyline{display:inline-flex;flex-wrap:wrap;gap:8px;margin:6px 0 18px}
.keyline .k{font-size:13px;color:var(--cyan);border:1px solid var(--line-strong);border-radius:999px;padding:4px 12px}
.byline{font-size:13px;color:var(--muted-2);margin:10px 0 4px;padding-left:12px;border-left:2px solid var(--cyan)}
.meta-time{font-size:13px;color:var(--muted-2);margin:6px 0 22px}

/* ===== TOC ===== */
.toc-aside{position:sticky;top:88px;max-height:calc(100vh - 110px);overflow-y:auto;border-left:1px solid var(--line);padding-left:18px}
.toc-aside h4{font-size:13px;color:var(--muted-2);text-transform:uppercase;letter-spacing:1px;margin:0 0 12px}
.toc-aside a{display:block;color:var(--muted);font-size:14px;padding:5px 0;border-left:2px solid transparent;margin-left:-19px;padding-left:17px}
.toc-aside a:hover{color:#fff;text-decoration:none;border-left-color:var(--cyan)}
@media(max-width:980px){.toc-aside{display:none}}

/* ===== FAQ ===== */
.faq details{border:1px solid var(--line);border-radius:12px;padding:14px 18px;margin:10px 0;background:rgba(255,255,255,.02)}
.faq details[open]{border-color:var(--line-strong)}
.faq summary{cursor:pointer;font-weight:700;color:#eaf6ff;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::before{content:"+";color:var(--cyan);font-weight:900;margin-right:10px}
.faq details[open] summary::before{content:"−"}
.faq div{padding-top:10px;color:var(--muted)}
.faq-title{font-size:22px;margin:40px 0 14px;color:#fff}

/* ===== 相关阅读 / 产品 ===== */
.rel-list{display:grid;gap:12px;margin-top:18px}
.rel-list a{display:block;padding:14px 18px;border:1px solid var(--line);border-radius:12px;color:#dbe9f7;background:rgba(255,255,255,.02)}
.rel-list a:hover{border-color:var(--line-strong);text-decoration:none;color:#fff}
.rel-list small{display:block;color:var(--muted-2);margin-top:4px;font-size:13px}

/* ===== 列表页（左分类） ===== */
.cat-wrap{display:grid;grid-template-columns:230px 1fr;gap:34px;align-items:start}
@media(max-width:860px){.cat-wrap{grid-template-columns:1fr}}
.cat-side{position:sticky;top:88px}
.category-list{list-style:none;margin:0;padding:0;border:1px solid var(--line);border-radius:14px;overflow:hidden;background:var(--panel)}
.category-list li a{display:flex;justify-content:space-between;align-items:center;padding:14px 18px;color:var(--muted);border-bottom:1px solid var(--line);font-weight:600}
.category-list li:last-child a{border-bottom:none}
.category-list li a:hover,.category-list li.active a{background:rgba(0,212,255,.08);color:#fff;text-decoration:none}
.category-list li a .n{font-size:12px;color:var(--muted-2)}
.cat-head{margin-bottom:18px}
.cat-head h1{font-size:26px;margin:0 0 6px;color:#fff}
.cat-head p{color:var(--muted);margin:0}
.list-item{display:block;padding:22px;border:1px solid var(--line);border-radius:14px;margin-bottom:16px;background:var(--panel);color:#dbe9f7}
.list-item:hover{border-color:var(--line-strong);text-decoration:none;color:#fff}
.list-item h3{margin:0 0 8px;color:#fff;font-size:18px}
.list-item p{margin:0;color:var(--muted);font-size:14px}
.list-item .meta{margin-top:10px;font-size:12px;color:var(--muted-2)}

/* ===== 页脚 ===== */
.site-footer{margin-top:60px;border-top:1px solid var(--line);background:rgba(7,11,22,.85);padding:46px 0 30px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:30px}
@media(max-width:760px){.foot-grid{grid-template-columns:1fr}}
.foot-grid h4{color:#fff;font-size:15px;margin:0 0 14px}
.foot-grid a,.foot-grid p{color:var(--muted);font-size:14px;display:block;margin:6px 0}
.foot-grid a:hover{color:var(--cyan)}
.beian{display:flex;gap:18px;flex-wrap:wrap;align-items:center;margin-top:26px;padding-top:20px;border-top:1px solid var(--line);font-size:13px;color:var(--muted-2)}
.beian a{display:inline-flex;align-items:center;gap:6px;color:var(--muted-2)}
.beian a:hover{color:var(--cyan);text-decoration:none}
.beian img{height:18px;width:auto;display:inline-block;border-radius:3px}
.copyright{margin-top:14px;color:var(--muted-2);font-size:13px}

/* ===== 左侧胶囊（企业微信 + 回到顶部） ===== */
.side-dock{position:fixed;left:18px;top:50%;transform:translateY(-50%);z-index:80;display:flex;flex-direction:column;gap:12px}
.dock-btn{display:flex;align-items:center;gap:8px;height:48px;padding:0 16px;justify-content:center;border-radius:999px;border:1px solid var(--line-strong);background:rgba(11,18,32,.85);backdrop-filter:blur(8px);color:#fff;cursor:pointer;transition:.2s;white-space:nowrap}
.dock-btn svg{width:22px;height:22px;flex:0 0 auto}
.dock-btn .lbl{font-size:13px;font-weight:700}
.dock-btn:hover{border-color:var(--cyan);text-decoration:none}
.dock-btn.wechat:hover{box-shadow:0 0 18px rgba(0,212,255,.3)}
.dock-btn.top{color:var(--cyan)}
@media(max-width:760px){
  .side-dock{flex-direction:row;left:50%;top:auto;bottom:18px;transform:translateX(-50%)}
  .dock-btn:hover{width:48px;padding:0;justify-content:center}
  .dock-btn:hover .lbl{opacity:0;max-width:0}
  .dock-btn .lbl{display:none}
}

/* ===== 名片弹窗 ===== */
.modal-mask{position:fixed;inset:0;z-index:120;background:rgba(3,6,14,.78);backdrop-filter:blur(6px);display:none;align-items:center;justify-content:center;padding:20px}
.modal-mask.open{display:flex}
.modal-card{position:relative;background:var(--panel-solid);border:1px solid var(--line-strong);border-radius:18px;padding:18px;max-width:340px;width:100%;text-align:center}
.modal-card img{max-width:300px;width:100%;height:auto;border-radius:12px;display:block;margin:0 auto}
.modal-card .tip{color:var(--muted);font-size:13px;margin-top:12px}
.modal-close{position:absolute;top:-14px;right:-14px;width:36px;height:36px;border-radius:50%;border:1px solid var(--line-strong);background:var(--panel-solid);color:#fff;font-size:18px;cursor:pointer}
.modal-close:hover{border-color:var(--cyan);color:var(--cyan)}

/* ===== 404 ===== */
.errbox{text-align:center;padding:120px 0}
.errbox h1{font-size:96px;margin:0;background:var(--accent-grad);-webkit-background-clip:text;background-clip:text;color:transparent}