:root{color-scheme:light;--ink:#171b25;--muted:#5c6574;--line:#dce1e8;--blue:#174bc2;--paper:#fff;--back:#f3f5f8}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:95px}body{margin:0;background:var(--back);color:var(--ink);font:17px/1.75 -apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif}a{color:var(--blue);text-underline-offset:3px}a:focus-visible,summary:focus-visible{outline:3px solid #5281ed;outline-offset:4px}.masthead{max-width:1240px;margin:auto;padding:23px 30px;display:flex;justify-content:space-between;gap:20px;border-bottom:1px solid var(--line);font-size:15px;font-weight:650}.local{color:var(--muted);font-weight:400}main{max-width:1240px;padding:0 30px;margin:auto}.intro{padding:30px 0 17px}.intro h1{font-size:clamp(29px,4.2vw,42px);line-height:1.3;letter-spacing:-1px;margin:0 0 15px}.intro p{margin:8px 0;max-width:900px}.tip{font-size:15px;color:var(--muted)}nav{display:flex;gap:8px;flex-wrap:wrap;position:sticky;top:0;z-index:2;padding:12px 0;background:var(--back);border-bottom:1px solid var(--line)}nav a{font-size:14px;text-decoration:none;padding:5px 11px;border:1px solid var(--line);background:var(--paper);border-radius:5px;white-space:nowrap}nav a:hover{border-color:var(--blue)}h2,h3,p{overflow-wrap:anywhere}h2{font-size:25px;line-height:1.4;margin:0 0 14px}h3{font-size:20px;line-height:1.45;margin:13px 0}.next-step{background:#eaf0ff;border-left:4px solid var(--blue);padding:22px;margin:25px 0 5px}.next-step p{margin:7px 0}.eyebrow{color:var(--blue);font-size:14px;font-weight:650}.group{padding-top:38px;scroll-margin-top:15px}.group-title{display:grid;grid-template-columns:45px 1fr;column-gap:13px;margin-bottom:20px;position:relative}.number{font:600 26px/1.45 ui-monospace,monospace;color:var(--blue)}.group-title h2 span{font-size:18px;font-weight:500;color:var(--muted);margin-left:14px;display:inline-block}.group-title p{margin:5px 0}.level{grid-column:2;font-size:14px;color:var(--blue)}.cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.next-step .cards{margin-top:18px}.evidence{background:var(--paper);border:1px solid var(--line);border-radius:8px;padding:20px;min-width:0;scroll-margin-top:110px}.evidence header{display:flex;gap:12px;align-items:baseline;flex-wrap:wrap;font-size:14px;color:var(--muted)}.index{color:var(--blue);font:700 15px/1.5 ui-monospace,monospace}.evidence blockquote{margin:0 0 16px;padding:1px 0 1px 14px;border-left:3px solid #becbf0;font-size:16px}.evidence blockquote p{margin:5px 0}.image-link{display:flex;background:#080b0f;border-radius:4px;justify-content:center;align-items:center;min-height:130px;overflow:hidden}.image-link img{width:100%;height:auto;max-height:600px;object-fit:contain;display:block}.image-caption{display:flex;justify-content:space-between;gap:12px;color:var(--muted);font-size:13px;margin-top:8px}.note{font-size:15px;color:var(--muted);margin:13px 0 0}.connections,.closing{padding-top:45px}.connections>p,.closing>p{max-width:980px}.table-wrap{overflow:auto;background:var(--paper);border:1px solid var(--line);border-radius:6px}table{width:100%;border-collapse:collapse;font-size:15px;text-align:left}td,th{padding:13px 16px;border-bottom:1px solid var(--line)}tr:last-child td{border-bottom:0}th{background:#e8edf5}.connections .cards{margin-top:25px}.closing{padding-bottom:32px}summary{padding:15px 0;cursor:pointer;font-weight:600}.closing details .evidence{max-width:680px}footer{text-align:center;color:var(--muted);font-size:14px;padding:25px;border-top:1px solid var(--line)}@media(max-width:720px){.masthead{padding:17px 16px;gap:10px;align-items:flex-start;font-size:14px}.masthead .local{text-align:right}main{padding:0 16px}.intro{padding-top:25px}.intro h1{letter-spacing:0}nav{gap:6px}nav a{padding:5px 8px;font-size:13px}.next-step{padding:16px}.cards{grid-template-columns:1fr;gap:16px}.group-title{grid-template-columns:35px 1fr;gap:9px}.group-title h2 span{display:block;margin:6px 0 0}.number{font-size:24px}.evidence{padding:16px}.image-link img{max-height:720px}.next-step .evidence{padding:12px}td,th{padding:10px;font-size:14px}.group{padding-top:30px}.note{font-size:15px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}