:root{--bg:#f9fafc;--paper:#fff;--ink:#172033;--muted:#647086;--line:#e1e5ee;--accent:#f4a51c;--accent-2:#18243c;--soft:#fff4dc;--wrap:1680px;--radius:20px;--shadow:0 18px 46px rgba(24,36,60,.12)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:system-ui,-apple-system,Segoe\ UI,Roboto,Arial,sans-serif;color:var(--ink);background:radial-gradient(circle at top right,rgba(244,165,28,.24),transparent 34rem) , linear-gradient(180deg,#f9fbff,#fff 42%,#f9fafc);line-height:1.65}a{color:#243a74;text-decoration-thickness:.1em;text-underline-offset:.18em}a:hover{color:#985d00}.wrap{width:min(var(--wrap),calc(100% - 48px));margin-inline:auto}.skip-link{position:absolute;left:-999px;width:1px;height:1px;overflow:hidden}.skip-link:focus{left:24px;top:16px;width:auto;height:auto;padding:10px 14px;background:#fff;border:2px solid var(--accent);z-index:10}.site-header{background:rgba(255,255,255,.94);backdrop-filter:blur(14px);border-bottom:1px solid 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9px;border-radius:999px;font-size:.78rem;font-weight:750;color:#7a4b00}.content-layout{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:26px;align-items:start;padding:34px 0}.main-content{background:#fff;border:1px solid var(--line);border-radius:24px;padding:clamp(22px,3vw,42px);box-shadow:0 12px 34px rgba(24,36,60,.06)}.main-content p{font-size:1.035rem}.toc,.side-card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:18px;margin-bottom:18px}.toc strong,.side-card strong{display:block;margin-bottom:8px}.toc a{display:block;padding:7px 0;text-decoration:none;border-bottom:1px dashed var(--line)}.notice{background:#fff8e8;border:1px solid #efd189;border-radius:18px;padding:18px}.related-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:14px}.related-list a{display:block;padding:12px;border:1px solid var(--line);border-radius:14px;background:#fcfcff;text-decoration:none;font-weight:750}.footer{margin-top:44px;background:#111827;color:#eef2ff;padding:38px 0}.footer a{color:#fff}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:24px}.footer small{color:#cbd5e1}.breadcrumbs{font-size:.92rem;color:var(--muted);margin:16px 0 0}.breadcrumbs a{text-decoration:none}.faq-item{border-top:1px solid var(--line);padding:18px 0}.faq-item:first-child{border-top:0}.source-list li{margin-bottom:12px}@media (max-width:1050px){.hero-card,.content-layout,.footer-grid{grid-template-columns:1fr}.article-grid,.grid{grid-template-columns:repeat(2,minmax(0,1fr))}.header-inner{align-items:flex-start;flex-direction:column}.nav{justify-content:flex-start}}@media (max-width:680px){.wrap{width:min(100% - 28px,var(--wrap))}.hero-card{padding:24px;border-radius:22px}.article-grid,.grid,.related-list,.stat-grid{grid-template-columns:1fr}h1{font-size:2.3rem}.nav a{padding:8px 9px;font-size:.9rem}}