:root{--bg:#f6f8fb;--panel:#fff;--ink:#0f172a;--muted:#64748b;--line:#dbe3ee;--blue:#2563eb;--nav:#101827;--nav2:#172033}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:"PingFang SC","Microsoft YaHei",Arial,sans-serif;line-height:1.65}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}
button{font:inherit}
.shell{display:grid;grid-template-columns:250px minmax(0,1fr);min-height:100vh}
.sidebar{position:sticky;top:0;height:100vh;padding:25px 18px;background:linear-gradient(180deg,var(--nav),var(--nav2));color:#fff;display:flex;flex-direction:column}
.brand{display:flex;align-items:center;gap:11px;color:#fff;font-weight:800;font-size:18px}
.brand:hover{text-decoration:none}
.brand-mark{width:42px;height:42px;display:grid;place-items:center;border-radius:9px;background:#2f6bff;color:#fff;font-size:16px}
.brand-sub{display:block;color:#9fb0cc;font-size:12px;font-weight:400;line-height:1.2}
.side-nav{display:grid;gap:5px;margin-top:35px}
.side-nav a{padding:11px 13px;border-radius:8px;color:#cbd5e1;font-weight:650}
.side-nav a:hover,.side-nav a[aria-current="page"]{background:#2c3b56;color:#fff;text-decoration:none}
.side-foot{margin-top:auto;padding:14px;border:1px solid #3d4a62;border-radius:10px;background:#23314a}
.side-foot small{display:block;color:#b7c4dc}
.side-foot a{color:#fff;font-weight:700}
.mobile-head{display:none}
.mobile-nav{display:none}
.main{min-width:0}
.topbar{height:74px;display:flex;justify-content:space-between;align-items:center;padding:0 32px;background:#fff;border-bottom:1px solid var(--line)}
.topbar nav{display:flex;gap:25px}
.topbar a{color:#334155;font-size:14px}
.content{max-width:1260px;margin:0 auto;padding:31px 32px 70px}
.eyebrow{color:var(--blue);font-size:13px;font-weight:700;letter-spacing:.04em}
h1{font-size:clamp(27px,3vw,38px);line-height:1.25;margin:10px 0 13px}
h2{font-size:24px;line-height:1.35;margin:0 0 12px}
h3{font-size:18px;line-height:1.35;margin:0 0 10px}
p{margin:0 0 16px}
.lead{color:var(--muted);font-size:16px;max-width:760px}
.hero{background:linear-gradient(125deg,#101827,#24395f);color:#fff;padding:38px;border-radius:18px;box-shadow:0 14px 35px rgba(15,23,42,.11)}
.hero h1,.hero p{color:#fff}
.hero p{max-width:650px;color:#dbe6f5}
.hero .eyebrow{color:#93c5fd}
.button{display:inline-block;border:0;border-radius:8px;background:var(--blue);color:#fff;padding:10px 17px;font-weight:700}
.button:hover{color:#fff;text-decoration:none;background:#1d4ed8}
.section{margin-top:32px}
.grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:15px}
.card,.article-card,.rail-card{background:var(--panel);border:1px solid var(--line);border-radius:14px}
.card{padding:21px;min-width:0}
.card p{color:var(--muted);font-size:14px;margin:0}
.card-icon{display:grid;place-items:center;width:34px;height:34px;border-radius:9px;background:#eff6ff;color:var(--blue);font-weight:800;margin-bottom:14px}
.card h3{margin-bottom:7px}
.link-list{display:grid;gap:9px}
.link-row{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:16px 18px;background:#fff;border:1px solid var(--line);border-radius:10px;color:var(--ink);font-weight:650}
.link-row:hover{border-color:#93c5fd;text-decoration:none}
.crumb{color:var(--muted);font-size:13px;margin-bottom:10px}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 284px;gap:20px;align-items:start;margin-top:22px}
.article-card{padding:24px;min-width:0}
.article-card section+section{border-top:1px solid var(--line);margin-top:23px;padding-top:23px}
.step-num{display:inline-grid;place-items:center;width:27px;height:27px;border-radius:8px;background:var(--blue);color:#fff;font-size:14px;margin-right:9px}
.rail{display:grid;gap:18px}
.rail-card{padding:20px}
.rail-card ul{list-style:none;padding:0;margin:0;display:grid;gap:12px}
.rail-card li a{color:#334155;font-size:14px}
pre{overflow-x:auto;max-width:100%;padding:18px 20px;background:#101827;color:#cbd5e1;border-radius:9px;font-size:13px;line-height:1.6;white-space:pre}
code{font-family:Menlo,Consolas,monospace}
p code,li code{padding:2px 5px;background:#eef2f7;border-radius:4px;font-size:.9em}
.ad-slot{padding:12px;background:#fff;border:1px solid var(--line);border-radius:11px;color:var(--ink);margin-top:20px;overflow:hidden}
.ad-slot iframe{max-width:100%}
.ad-label{display:block;font-size:12px;color:var(--blue);font-weight:700;margin-bottom:8px}
.article-card>.ad-slot{margin-top:23px}
.article-card>.ad-slot+section{border-top:1px solid var(--line);margin-top:23px;padding-top:23px}
.ad-smartlink{display:inline-block;margin-right:18px}
.wide-ad{max-width:780px;margin:24px auto 0;text-align:center}
.mobile-ad{display:none}
.desktop-ad{min-height:290px}
.mobile-only{display:none}
.notice{padding:16px 18px;border-radius:10px;background:#ecfdf5;color:#065f46}
.footer{margin-top:35px;padding-top:20px;border-top:1px solid var(--line);font-size:13px;color:var(--muted)}
.footer a{margin-right:18px}
[aria-disabled="true"]{opacity:.55;pointer-events:none}
@media(min-width:1101px){.article-layout{grid-template-columns:minmax(0,1fr) 340px}}
@media(max-width:1100px){.grid{grid-template-columns:repeat(2,minmax(0,1fr))}.article-layout{grid-template-columns:minmax(0,1fr) 235px}.topbar{padding:0 24px}.content{padding:26px 24px 60px}.desktop-ad,.wide-ad{display:none}}
@media(max-width:800px){.shell{display:block}.sidebar,.topbar{display:none}.mobile-head{display:flex;align-items:center;justify-content:space-between;background:var(--nav);padding:12px 17px}.mobile-head button{background:none;border:0;color:#fff;font-size:24px;cursor:pointer}.mobile-nav{display:none;background:var(--nav2);padding:8px 16px}.mobile-nav.open{display:grid}.mobile-nav a{padding:10px;color:#fff}.content{padding:19px 16px 50px}.hero{padding:27px 23px}.article-layout{display:block}.article-card{padding:17px}.rail,.desktop-only{display:none}.mobile-only{display:block}.mobile-ad{display:block}.grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.card{padding:15px}.card h3{font-size:16px}.lead{font-size:14px}}
@media(max-width:390px){.grid{grid-template-columns:1fr}.hero{padding:24px 19px}}