:root{--bg:#0b0e14;--panel:#121722;--line:#232b3b;--text:#e6e9f0;--muted:#8b93a7;--blue:#2d5bd0;--red:#d1411e}[data-theme=light]{--bg:#f7f8fa;--panel:#fff;--line:#e3e6ec;--text:#1c2333;--muted:#5b6478}[data-theme=light] .brandlogo{filter:invert(1)}.theme-btn{background:none;border:1px solid var(--line);color:var(--muted);border-radius:6px;margin-left:18px;padding:2px 9px;cursor:pointer;font-size:14px}.theme-btn:hover{color:var(--text);border-color:var(--muted)}.legend{display:flex;flex-wrap:wrap;gap:4px 12px;padding:4px 6px 8px}.legend-i{display:inline-flex;align-items:center;gap:5px;font-size:12px;color:var(--muted)}.legend-i i{width:10px;height:3px;border-radius:1px;display:inline-block}*{box-sizing:border-box}body,html{margin:0;padding:0;background:var(--bg);color:var(--text);font:15px/1.6 -apple-system,Segoe UI,Inter,Roboto,sans-serif}a{color:#7ea1ee;text-decoration:none}a:hover{text-decoration:underline}.wrap{max-width:1160px;margin:0 auto;padding:0 20px}.top{justify-content:space-between;padding:14px 0;border-bottom:1px solid var(--line)}.brand,.top{display:flex;align-items:center}.brand{gap:10px;font-weight:800;letter-spacing:-.01em;font-size:17px;color:var(--text)}.brand:hover{text-decoration:none}.brand span{color:var(--blue)}.brandlogo{height:22px;width:auto}.nav a{color:var(--muted);margin-left:18px;font-size:14px}.body{display:grid;grid-template-columns:220px 1fr;grid-gap:34px;gap:34px;min-height:70vh}.side{border-right:1px solid var(--line);padding:26px 18px 26px 0}.side-h{font-size:11px;letter-spacing:.09em;text-transform:uppercase;margin-bottom:10px}.side-a,.side-h{color:var(--muted)}.side-a{display:block;font-size:14px;padding:6px 10px;border-radius:6px;margin-bottom:2px}.side-a:hover{color:var(--text);text-decoration:none;background:hsla(0,0%,45%,.08)}.side-a.on{color:var(--text);background:rgba(45,91,208,.14)}.main{padding:26px 0;min-width:0}@media (max-width:800px){.body{grid-template-columns:1fr}.side{border-right:0;border-bottom:1px solid var(--line);padding:14px 0}}.hero h1{font-size:28px;letter-spacing:-.02em;margin:4px 0 10px}.hero p{color:var(--muted);max-width:660px;margin:0 0 10px}.why{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));grid-gap:12px;gap:12px;margin:20px 0 6px}.why div{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:12px 14px;font-size:13.5px;color:var(--muted)}.why b{color:var(--text);display:block;margin-bottom:3px}.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));grid-gap:14px;gap:14px;padding:20px 0 30px;grid-auto-rows:1fr}.card{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:16px;display:flex;flex-direction:column;color:var(--text);transition:border-color .15s;min-height:148px}.card:hover{border-color:var(--blue);text-decoration:none}.card h3{margin:0 0 6px;font-size:15.5px}.card .sub{color:var(--muted);font-size:13px;line-height:1.5;flex:1 1;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.chips{display:flex;flex-wrap:nowrap;gap:6px;margin-top:12px;overflow:hidden}.chip{background:rgba(45,91,208,.12);border:1px solid rgba(45,91,208,.35);color:#a8bdf3;border-radius:5px;font-size:12px;padding:2px 8px;white-space:nowrap}.chip.red{background:rgba(209,65,30,.1);border-color:rgba(209,65,30,.4);color:#f0a18c}.bt-head h1{font-size:24px;margin:2px 0 4px;letter-spacing:-.02em}.bt-head .lead{color:var(--text);font-size:15px;margin:0 0 4px}.bt-head .src{color:var(--muted);font-size:13px}.chartbox{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:10px;margin:16px 0}.note{background:hsla(0,0%,45%,.08);border:1px solid hsla(0,0%,45%,.22);border-radius:8px;padding:12px 16px;color:var(--text);font-size:14px;margin:14px 0}.fine,.footer{color:var(--muted);font-size:12.5px}.footer{border-top:1px solid var(--line);padding:14px 0 30px;margin-top:26px}table.seams{border-collapse:collapse;width:100%;font-size:13.5px;margin:6px 0 14px}table.seams td,table.seams th{border-bottom:1px solid var(--line);padding:6px 10px;text-align:left}table.seams th{color:var(--muted);font-weight:600}code{background:hsla(0,0%,45%,.15);border-radius:4px;padding:1px 6px;font-size:.9em}