:root{--navy:#0e2238;--navy2:#16405f;--brand:#1a6a9e;--teal:#0f97a5;--gold:#d4972a;
--ink:#12293c;--gray:#5b7288;--line:#dde7ef;--light:#f4f8fb;--white:#fff;
--shadow:0 10px 30px rgba(14,34,56,.08);--shadow-lg:0 18px 46px rgba(14,34,56,.16)}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);
background:var(--white);line-height:1.85;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}img{max-width:100%;display:block}
.container{width:min(1120px,94%);margin:0 auto}
.hd{position:sticky;top:0;z-index:70;background:rgba(255,255,255,.97);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.hd-in{display:flex;align-items:center;justify-content:space-between;height:64px;gap:14px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--navy);font-size:16.5px}
.logo i{width:32px;height:32px;border-radius:9px;background:linear-gradient(135deg,var(--navy2),var(--teal));color:#fff;
display:grid;place-items:center;font-style:normal;font-size:15px}
.logo small{display:block;font-size:10px;color:var(--gray);letter-spacing:1.3px;font-weight:600}
.nav{display:flex;align-items:center;gap:4px;flex-wrap:wrap}
.nav a{padding:8px 13px;border-radius:9px;font-size:14px;font-weight:600}
.nav a:hover{background:var(--light);color:var(--brand)}
.nav a.on{background:var(--navy);color:#fff}
.nav a.cta{background:var(--gold);color:#fff}
.hero{background:radial-gradient(900px 420px at 80% -20%,rgba(15,151,165,.3),transparent 62%),linear-gradient(150deg,#0b1b2c,#16405f 65%,#1a6a9e);color:#fff;position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;width:440px;height:440px;right:-150px;bottom:-240px;border-radius:50%;border:2px solid rgba(212,151,42,.3)}
.hero-in{padding:46px 0 42px;position:relative;z-index:2}
.hero .badge{display:inline-flex;align-items:center;gap:7px;padding:5px 13px;border-radius:999px;background:rgba(15,151,165,.2);
border:1px solid rgba(15,151,165,.45);color:#c9f0f4;font-size:12.5px;font-weight:700}
.hero h1{font-size:36px;margin:14px 0 10px;line-height:1.3}
.hero p{color:rgba(255,255,255,.85);font-size:14.5px;max-width:760px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 24px;border-radius:11px;font-weight:700;font-size:14.5px;
border:1px solid transparent;cursor:pointer;transition:.2s}
.btn-gold{background:var(--gold);color:#fff}.btn-gold:hover{background:#c98a22}
.btn-line{border-color:rgba(255,255,255,.5);color:#fff}.btn-line:hover{background:rgba(255,255,255,.12)}
.btn-brand{background:var(--brand);color:#fff}.btn-brand:hover{background:#155a89}
.btn-ghost{border-color:var(--line);background:#fff;color:var(--brand)}.btn-ghost:hover{border-color:var(--brand)}
.btn-sm{padding:9px 18px;font-size:13.5px}
.sec{padding:50px 0}.sec.light{background:var(--light)}
.sec-head{max-width:820px;margin-bottom:26px}
.sec-tag{display:inline-block;font-size:12px;font-weight:800;letter-spacing:2.4px;color:var(--teal)}
.sec-head h2{font-size:26px;color:var(--navy);margin:8px 0 10px}
.sec-head p{color:var(--gray);font-size:14.5px}
.grid{display:grid;gap:18px}.g2{grid-template-columns:repeat(2,1fr)}.g3{grid-template-columns:repeat(3,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:15px;padding:22px;box-shadow:var(--shadow);transition:.2s}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.card h3{font-size:17.5px;color:var(--navy);margin-bottom:8px}
.card p{color:var(--gray);font-size:13.5px}
.num-tag{display:inline-block;font-size:11.5px;font-weight:800;color:var(--teal);letter-spacing:1px;margin-bottom:6px}
.tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.tag{padding:5px 12px;border-radius:999px;background:var(--light);border:1px solid var(--line);font-size:12px;color:var(--brand);font-weight:600}
/* 阅读页布局 */
.read-wrap{display:grid;grid-template-columns:250px minmax(0,1fr);gap:34px;align-items:start;padding:34px 0 60px}
.toc{position:sticky;top:84px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px 17px;box-shadow:var(--shadow);
max-height:calc(100vh - 120px);overflow:auto}
.toc h4{font-size:13px;color:var(--gray);letter-spacing:1px;margin-bottom:10px}
.toc a{display:block;padding:6px 8px;border-radius:8px;font-size:13.5px;color:var(--ink);font-weight:600}
.toc a:hover{background:var(--light);color:var(--brand)}
.toc a.lv3{padding-left:20px;font-size:13px;font-weight:500;color:var(--gray)}
.article{min-width:0}
.searchbar{position:relative;margin-bottom:22px}
.searchbar input{width:100%;padding:13px 96px 13px 42px;border:1px solid var(--line);border-radius:12px;font-size:14.5px;
background:#fff;box-shadow:var(--shadow);outline:none}
.searchbar input:focus{border-color:var(--brand)}
.searchbar .ico{position:absolute;left:15px;top:12px;color:var(--gray)}
.searchbar .cnt{position:absolute;right:14px;top:13px;font-size:12.5px;color:var(--gray)}
.article h2{font-size:24px;color:var(--navy);margin:38px 0 14px;padding-top:10px;border-top:2px solid var(--line)}
.article h2:first-of-type{border-top:none;margin-top:0}
.article h3{font-size:18.5px;color:var(--navy2);margin:24px 0 10px}
.article h4{font-size:16px;color:var(--navy2);margin:18px 0 8px}
.article p{margin:0 0 13px;font-size:15.5px;color:#1e3346}
.article ul{margin:0 0 14px 0;list-style:none}
.article ul li{position:relative;padding:5px 0 5px 20px;font-size:15.5px}
.article ul li::before{content:"";position:absolute;left:3px;top:15px;width:7px;height:7px;border-radius:50%;background:var(--teal)}
.article .fig{margin:18px 0 22px;border:1px solid var(--line);border-radius:14px;overflow:hidden;box-shadow:var(--shadow);background:#fff}
.article .fig a{display:block}
.article .fig img{width:100%}
.article .fig figcaption{padding:9px 14px;font-size:13px;color:var(--gray);background:#fbfdff;border-top:1px solid var(--line);text-align:center}
.article .callout{background:#fdf9f0;border-left:3px solid var(--gold);border-radius:0 12px 12px 0;padding:13px 16px;margin:14px 0 18px;font-size:14.5px;color:#6b5624}
.article table{width:100%;border-collapse:collapse;font-size:14px;margin:12px 0 18px;box-shadow:var(--shadow);border-radius:12px;overflow:hidden}
.article th,.article td{border:1px solid var(--line);padding:9px 12px;text-align:left}
.article th{background:var(--navy);color:#fff;font-size:13px}
.article mark{background:#ffe9a8;padding:0 2px;border-radius:3px}
.hidden{display:none !important}
.pager{display:flex;justify-content:space-between;gap:12px;margin-top:36px;flex-wrap:wrap}
.orig{margin-top:34px;border-top:1px dashed var(--line);padding-top:20px}
.orig summary{cursor:pointer;font-weight:700;color:var(--brand);font-size:15px}
.orig .pages{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:16px}
.orig .pages a{display:block;border:1px solid var(--line);border-radius:10px;overflow:hidden;background:#fff}
.orig .pages span{display:block;text-align:center;font-size:12px;color:var(--gray);padding:5px 0}
.note{font-size:12.5px;color:var(--gray);line-height:1.9;margin-top:14px}
.cta{background:linear-gradient(120deg,#16405f,#1a6a9e);border-radius:18px;padding:30px;color:#fff;display:flex;
justify-content:space-between;align-items:center;gap:22px;flex-wrap:wrap;box-shadow:var(--shadow-lg)}
.cta h3{font-size:22px;margin-bottom:6px}.cta p{color:rgba(255,255,255,.84);font-size:14px}
.ft{background:var(--navy);color:rgba(255,255,255,.8);padding:34px 0 22px;font-size:13.5px}
.ft b{color:#fff;font-size:15px}.ft a{color:#7fe3ec}
.ft-in{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap}
.ft .cp{margin-top:20px;padding-top:15px;border-top:1px solid rgba(255,255,255,.14);font-size:12.5px;color:rgba(255,255,255,.55)}
.top{position:fixed;right:20px;bottom:24px;width:44px;height:44px;border-radius:50%;background:var(--brand);color:#fff;
display:grid;place-items:center;box-shadow:var(--shadow-lg);opacity:0;pointer-events:none;transition:.25s;z-index:80}
.top.on{opacity:1;pointer-events:auto}
@media(max-width:992px){
.read-wrap{grid-template-columns:1fr;gap:18px;padding:20px 0 40px}
.toc{position:static;max-height:none}
.toc .toc-body{display:none}
.toc.open .toc-body{display:block}
.g2,.g3{grid-template-columns:1fr}
.hero h1{font-size:27px}
.orig .pages{grid-template-columns:repeat(2,1fr)}
.nav{display:none}
}
@media(max-width:600px){.article p,.article ul li{font-size:15px}.orig .pages{grid-template-columns:1fr 1fr}}