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h2{border-top:1px solid var(--line);margin:0 0 22px;padding-top:19px;font-size:clamp(25px,3.2vw,34px)}.prd-document h2:first-child{border-top:0;padding-top:0}.prd-document h3{color:var(--ink-soft);margin:34px 0 15px;font-size:clamp(19px,2.4vw,24px)}.prd-heading-number{color:inherit;font-size:inherit;font-variant-numeric:tabular-nums;font-weight:inherit;letter-spacing:inherit;vertical-align:baseline;margin-right:.4em;display:inline-block}.prd-paragraph{max-width:760px;color:var(--ink-soft);white-space:pre-wrap;margin:0 0 19px;font-family:PingFang SC,Hiragino Sans GB,Microsoft YaHei,Arial,sans-serif;font-size:16px;line-height:2}.prd-jtbd{border-left:3px solid var(--accent);color:var(--ink);background:#ffffffad;margin:5px 0 28px;padding:19px 22px}.prd-metric{background:#ffffff94;border:1px solid #dce4f1db;border-radius:12px;margin-bottom:10px;padding:12px 15px;line-height:1.8}.prd-spacer{height:13px}.prd-footer{border-top:1px solid var(--line);color:var(--muted);align-items:center;gap:10px;padding:30px 0 0;font-size:12px;display:flex}.prd-footer-rule{background:var(--accent);border-radius:50%;width:7px;height:7px}@media (max-width:900px){.prd-layout{grid-template-columns:1fr;gap:0}.prd-toc{max-height:none;padding-top:28px;position:static}.prd-toc ol{flex-wrap:wrap;gap:3px 7px;display:flex}.prd-toc li a,.prd-toc-level-3 a{background:#ffffff8f;padding:4px 7px!important}.prd-document{padding-top:34px}}@media (max-width:680px){.prd-page{padding:16px 17px 48px}.prd-header{gap:13px;padding:21px 0 24px}.prd-header-mark{border-radius:12px;flex-basis:38px;width:38px;height:38px;font-size:17px}.prd-header h1{font-size:32px}.prd-meta{font-size:12px}.prd-paragraph{font-size:15px;line-height:1.9}.prd-jtbd{padding:15px 17px}}