.inline-link{text-decoration:underline;text-underline-offset:5px;text-decoration-thickness:1px}
.inline-link:hover{color:var(--muted)}
.section-topic-link{margin-top:28px;font-size:14px}
.topic-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 44px}
.topic-link{display:block;border-top:1px solid var(--line);padding:26px 0 32px}
.topic-link h3{font-size:27px;line-height:1.3;margin:13px 0}
.topic-link p{font-size:15px;color:var(--muted);max-width:560px}
.topic-link:hover h3{text-decoration:underline;text-underline-offset:6px;text-decoration-thickness:1px}
.topic-directory-heading{margin-bottom:34px}
.topic-page .site-header{grid-template-columns:minmax(150px,1fr) auto minmax(150px,1fr)}
.topic-hero{padding:32px 0 66px;border-bottom:1px solid var(--line)}
.breadcrumbs{display:flex;flex-wrap:wrap;gap:12px;font-size:12px;color:var(--muted);margin-bottom:64px}
.breadcrumbs a:hover{text-decoration:underline;text-underline-offset:4px}
.topic-hero>.eyebrow{margin-bottom:20px}
.topic-hero h1{font-size:clamp(44px,5vw,72px);max-width:1000px;line-height:1.12;letter-spacing:-.04em;text-wrap:balance}
.topic-intro{font-size:20px;line-height:1.7;max-width:780px;margin-top:26px}
.topic-byline{font-size:12px;color:var(--muted);margin-top:28px}
.topic-layout{display:grid;grid-template-columns:240px minmax(0,760px);gap:9%;justify-content:space-between;padding-top:60px}
.topic-toc nav{position:sticky;top:calc(var(--header-height) + 30px);display:grid;gap:0;padding-bottom:30px}
.topic-toc .eyebrow{margin-bottom:16px}
.topic-toc a{display:block;padding:10px 0;border-top:1px solid var(--line);font-size:13px;line-height:1.5;color:var(--muted)}
.topic-toc a:hover{color:var(--ink)}
.topic-section{padding:0 0 52px;margin-bottom:32px;border-bottom:1px solid var(--line)}
.topic-section h2{font-size:34px;line-height:1.3;letter-spacing:-.025em;margin-bottom:24px}
.topic-section p{font-size:17px;line-height:1.8;margin-top:18px;max-width:740px}
.topic-section ul{padding-left:24px;margin:22px 0 0;font-size:16px;line-height:1.8}
.topic-section li+li{margin-top:12px}
.topic-table{overflow:auto;margin-top:26px;border-top:1px solid var(--ink)}
.topic-table table{border-collapse:collapse;min-width:500px;width:100%;font-size:14px;line-height:1.65;text-align:left}
.topic-table th,.topic-table td{padding:15px 14px 15px 0;border-bottom:1px solid var(--line);vertical-align:top}
.topic-table th{font-size:12px;font-weight:500;color:var(--muted)}
.topic-table caption{font-size:12px;text-align:left;padding:12px 0;color:var(--muted)}
.topic-faq{border-top:1px solid var(--line)}
.topic-faq summary{display:flex;align-items:center;justify-content:space-between;gap:22px;min-height:56px;padding:16px 0;list-style:none;font-size:16px;cursor:pointer}
.topic-faq summary::-webkit-details-marker{display:none}
.topic-faq[open] .details-indicator::after{content:"−"}
.topic-faq p{margin:0 0 24px;color:var(--muted);font-size:16px}
.topic-contact{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:40px;align-items:center;margin-top:40px;padding:44px 40px;background:var(--ink);color:var(--paper)}
.topic-contact .eyebrow{color:#bbcfcc;margin-bottom:16px}
.topic-contact h2{font-size:38px;max-width:700px}
.topic-contact p:not(.eyebrow){max-width:670px;margin-top:18px;color:#dce7e3}
.topic-contact-actions{display:flex;flex-direction:column;align-items:flex-start;gap:18px}
.topic-contact .primary-action{background:var(--amber);color:var(--ink)}
.topic-contact a:focus-visible{outline-color:var(--amber)}
.topic-related{padding:70px 0 50px}
.topic-related>h2{font-size:30px;margin-bottom:28px}
.topic-page .site-footer p{max-width:520px}
html[lang=zh-CN] .topic-hero h1{line-height:1.25;letter-spacing:0;max-width:900px}
html[lang=zh-CN] .topic-section h2{letter-spacing:0}
@media(max-width:1100px){.topic-layout{grid-template-columns:200px minmax(0,1fr);gap:7%}.topic-contact{grid-template-columns:1fr}.topic-page .site-header{grid-template-columns:minmax(0,1fr) auto auto}}
@media(max-width:900px){.topic-layout{grid-template-columns:1fr;gap:30px}.topic-toc nav{position:static;display:flex;flex-wrap:wrap;gap:8px 20px}.topic-toc .eyebrow{flex-basis:100%;margin-bottom:0}.topic-toc a{border-top:0;padding:8px 0;border-bottom:1px solid var(--line)}.topic-hero{padding-bottom:44px}.breadcrumbs{margin-bottom:42px}}
@media(max-width:680px){
  .topic-page .site-header{grid-template-columns:minmax(0,1fr) auto}
  .topic-hero{padding-top:24px}.breadcrumbs{margin-bottom:32px;gap:8px;font-size:11px}
  .topic-hero h1{font-size:40px;line-height:1.15;letter-spacing:-.035em}
  html[lang=zh-CN] .topic-hero h1{font-size:36px;line-height:1.3}
  .topic-intro{font-size:17px;line-height:1.75}.topic-byline{font-size:11px}
  .topic-layout{padding-top:26px;gap:8px}.topic-section{padding-bottom:32px;margin-bottom:30px}
  .topic-section h2{font-size:28px;margin-bottom:18px}.topic-section p{font-size:16px;line-height:1.85}
  .topic-table table{font-size:13px;min-width:440px}.topic-faq summary{font-size:15px}
  .topic-contact{padding:28px 22px;margin-top:12px;gap:26px}.topic-contact h2{font-size:30px}
  .topic-related{padding-top:48px}.topic-links{grid-template-columns:1fr}.topic-link h3{font-size:25px}
}