:root{color-scheme:light;--ink:#14283d;--muted:#52677b;--line:#d4dfe7;--blue:#205bca;--green:#00866b;font-family:Inter,"Segoe UI","Microsoft YaHei",system-ui,sans-serif}
*{box-sizing:border-box;letter-spacing:0}html{scroll-behavior:smooth;scroll-padding-top:94px}body{margin:0;color:var(--ink);background:#fff}a{color:var(--blue);text-underline-offset:4px}img{max-width:100%;height:auto;display:block}.guide-shell{width:min(1180px,calc(100% - 48px));margin:auto}.skip-link{position:fixed;top:-60px;left:16px;z-index:100;background:#fff;padding:12px}.skip-link:focus{top:8px}
.guide-header{position:sticky;top:0;z-index:20;background:#fff;border-bottom:1px solid var(--line)}.header-row{display:flex;justify-content:space-between;align-items:center;gap:24px;min-height:72px}.guide-brand{display:flex;gap:10px;align-items:center;text-decoration:none;color:var(--ink)}.guide-brand img{border-radius:50%}.header-row nav{display:flex;gap:24px;align-items:center;font-size:14px}.header-row nav a{text-decoration:none}.language-link{font-weight:700}.guide-path{display:flex;gap:12px;align-items:center;margin-top:30px;font-size:13px}.guide-path a{text-decoration:none}.guide-heading{max-width:960px;padding:42px 0 36px}.eyebrow{color:var(--green);font-size:12px;font-weight:750;margin:0 0 18px}.guide-heading h1{font-size:44px;line-height:1.22;margin:0;overflow-wrap:anywhere}.guide-intro{font-size:19px;line-height:1.75;color:var(--muted);max-width:870px;margin:22px 0 16px}.record-label{font-size:13px;color:var(--muted);margin:0;line-height:1.6}.guide-tabs{display:flex;flex-wrap:wrap;border-top:1px solid var(--line);border-bottom:1px solid var(--line);gap:4px 28px}.guide-tabs a{padding:17px 0;text-decoration:none;color:var(--muted);font-size:14px;font-weight:650;border-bottom:3px solid transparent}.guide-tabs [aria-current]{border-bottom-color:var(--blue);color:var(--blue)}
.guide-layout{display:grid;grid-template-columns:210px minmax(0,1fr);gap:60px;padding:40px 0 74px}.guide-toc{position:sticky;top:108px;align-self:start;font-size:13px;border-left:3px solid var(--green);padding-left:18px}.guide-toc nav{display:grid;gap:14px;margin-top:18px}.guide-toc a{text-decoration:none;color:var(--muted);line-height:1.5}.guide-toc a:hover{color:var(--blue)}.guide-layout article{min-width:0}.guide-section{padding:34px 0;border-bottom:1px solid var(--line);scroll-margin-top:20px}.guide-section:first-child{padding-top:0}.guide-section h2{font-size:28px;line-height:1.35;margin:0 0 20px}.guide-section p,.guide-list{font-size:16px;line-height:1.85;color:#354d60}.guide-list{padding-left:22px}.guide-list li+li{margin-top:12px}
.table-scroll{overflow-x:auto;max-width:100%;margin:24px 0;border:1px solid var(--line);border-radius:4px;overscroll-behavior-x:contain}table{width:100%;border-collapse:collapse;font-size:14px;line-height:1.7}caption{padding:12px 16px;text-align:left;color:var(--muted);background:#f5f8fa;font-size:12px}th,td{padding:14px 16px;vertical-align:top;text-align:left;border-top:1px solid var(--line);min-width:118px}thead th{background:#edf3f8;color:#29465d;font-size:13px}tbody th{font-weight:650;width:27%}td{color:#40576a}tbody tr:nth-child(even){background:#fafcfd}.evidence-note{padding:18px 22px;margin:24px 0;background:#edf7f3;border-left:4px solid var(--green)}.evidence-note p{font-size:14px;margin:8px 0 0}.evidence-note strong{font-size:15px}.guide-figure{margin:28px 0}.guide-figure img{width:100%;background:#f3f7fb;border:1px solid var(--line)}.guide-figure figcaption{font-size:12px;line-height:1.7;color:var(--muted);padding:12px 0}.guide-figure figcaption a{display:inline-block;margin-left:8px}
.reading-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin:24px 0}.reading-links>a{position:relative;padding:22px 46px 22px 22px;border:1px solid var(--line);border-radius:5px;text-decoration:none;display:flex;flex-direction:column;gap:10px}.reading-links>a:hover{border-color:var(--blue);background:#f8fbff}.reading-links strong{font-size:17px;line-height:1.5;color:var(--ink)}.reading-links span{font-size:14px;line-height:1.7;color:var(--muted)}.reading-links b{position:absolute;right:20px;top:22px;font-size:22px}.guide-next{display:flex;justify-content:space-between;gap:24px;padding-top:30px;font-size:14px}.guide-footer{background:#f1f5f8;border-top:1px solid var(--line);padding:36px 0}.guide-footer p{color:var(--muted);font-size:14px;line-height:1.8}.guide-footer a{font-size:14px}a:focus-visible,.table-scroll:focus-visible{outline:3px solid #da8300;outline-offset:4px}
@media(max-width:920px){.guide-layout{grid-template-columns:1fr;gap:28px}.guide-toc{position:static}.guide-toc nav{display:flex;flex-wrap:wrap;gap:12px 24px}.guide-heading h1{font-size:38px}}
@media(max-width:600px){.guide-shell{width:calc(100% - 32px)}.header-row{gap:12px;min-height:64px;flex-wrap:wrap;padding:12px 0}.guide-brand strong{font-size:15px}.guide-brand img{width:30px;height:30px}.header-row nav{gap:14px;font-size:12px}.guide-heading{padding:30px 0}.guide-heading h1{font-size:30px}.guide-intro{font-size:17px}.guide-tabs{gap:0 22px}.guide-tabs a{font-size:13px;padding:12px 0}.guide-layout{padding-top:28px}.guide-section h2{font-size:24px}.guide-section p,.guide-list{font-size:15px}.reading-links{grid-template-columns:1fr}th,td{padding:12px;min-width:106px}.guide-next{flex-wrap:wrap}.guide-section{padding:28px 0}.evidence-note{padding:16px}.guide-footer{padding:28px 0}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}