:root{--ink:#172033;--muted:#687386;--brand:#2563eb;--brand2:#1d4ed8;--bg:#f6f8fb;--card:#fff;--line:#e5eaf2;--max:1180px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.65}
a{color:inherit;text-decoration:none}.container{width:min(var(--max),92%);margin:auto}
header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}.nav{height:72px;display:flex;align-items:center;gap:28px}.logo{font-weight:900;font-size:22px;letter-spacing:-.5px}.logo span{color:var(--brand)}
.navlinks{display:flex;gap:20px;align-items:center;flex:1}.navlinks a{font-size:14px;color:#4b5565;font-weight:600}.navlinks a:hover{color:var(--brand)}
.search{border:1px solid var(--line);border-radius:10px;padding:9px 12px;width:180px}
.hero{padding:70px 0 52px;background:linear-gradient(135deg,#eef5ff,#fff)}.hero h1{font-size:clamp(34px,5vw,58px);line-height:1.05;max-width:760px;margin:0 0 18px;letter-spacing:-2px}.hero p{color:var(--muted);font-size:18px;max-width:700px}
.btn{display:inline-block;background:var(--brand);color:#fff;padding:12px 18px;border-radius:9px;font-weight:700}.btn:hover{background:var(--brand2)}
.section{padding:48px 0}.section h2{font-size:28px;margin:0 0 20px}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:22px;box-shadow:0 4px 18px rgba(20,35,60,.04)}.card h3{margin:8px 0;font-size:20px;line-height:1.3}.card p{color:var(--muted);margin:8px 0}.tag{font-size:12px;font-weight:800;color:var(--brand);text-transform:uppercase;letter-spacing:.6px}
.ad{min-height:110px;border:1px dashed #bdc7d8;background:#fafbfd;border-radius:12px;display:flex;align-items:center;justify-content:center;color:#8b96a8;font-size:12px;margin:28px 0}
.breadcrumb{font-size:13px;color:var(--muted);padding:28px 0}.article{max-width:820px;margin:auto;background:#fff;border:1px solid var(--line);border-radius:16px;padding:38px}.article h1{font-size:clamp(32px,5vw,48px);line-height:1.12;letter-spacing:-1px;margin:8px 0 15px}.article .lead{font-size:19px;color:var(--muted)}.article h2{margin-top:34px}.article ul{padding-left:22px}.article a{color:var(--brand);font-weight:650;text-decoration:underline;text-underline-offset:3px}
.meta{font-size:13px;color:var(--muted);margin-bottom:20px}.toc{background:#f5f8ff;border:1px solid #dbe7ff;border-radius:12px;padding:18px;margin:25px 0}.toc strong{display:block;margin-bottom:8px}
.related{margin-top:36px}.related .grid{grid-template-columns:repeat(2,1fr)}
.page-title{padding:48px 0 24px}.page-title h1{font-size:42px;letter-spacing:-1px;margin:0 0 8px}.page-title p{color:var(--muted);max-width:720px}
footer{margin-top:50px;background:#101827;color:#cbd5e1;padding:42px 0}.footergrid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:30px}.footergrid h4{color:#fff;margin-top:0}.footergrid a{display:block;margin:7px 0;color:#cbd5e1;font-size:14px}.copy{border-top:1px solid #263143;margin-top:30px;padding-top:20px;font-size:13px}
.notice{font-size:12px;color:#667085;text-align:center;padding:12px;background:#fff;border-top:1px solid var(--line)}
@media(max-width:850px){.grid{grid-template-columns:1fr 1fr}.navlinks{display:none}.search{margin-left:auto;width:150px}.footergrid{grid-template-columns:1fr 1fr}.article{padding:24px}}
@media(max-width:560px){.grid,.related .grid{grid-template-columns:1fr}.hero{padding:48px 0}.search{display:none}.article{border-radius:10px;padding:20px}.page-title h1{font-size:34px}}

.article .hero-box{background:linear-gradient(135deg,#f4f8ff,#fff);border:1px solid #dce7fb;border-radius:14px;padding:24px;margin:22px 0}
.article .checklist{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:18px 0}.article .checklist div{background:#f8fafc;border:1px solid var(--line);padding:12px;border-radius:9px}
.faq{border-top:1px solid var(--line);padding:14px 0}.faq h3{margin:0 0 5px;font-size:17px}.smallnote{font-size:13px;color:var(--muted)}
@media(max-width:560px){.article .checklist{grid-template-columns:1fr}}