:root{--bg:#f8f9fb;--surface:#fff;--surface-2:#f1f3f7;--text:#1a2233;--muted:#5b6472;--border:#e3e7ee;--primary:#4f46e5;--primary-hover:#4338ca;--primary-soft:#eef2ff;--success:#15803d;--danger:#b91c1c;--radius:12px;--radius-sm:8px;--shadow:0 1px 3px #10182812, 0 1px 2px #1018280a;--shadow-lg:0 8px 24px #10182817;--max-w:1080px}@media (prefers-color-scheme:dark){:root{--bg:#0f1420;--surface:#171e2e;--surface-2:#1f2739;--text:#e6eaf2;--muted:#98a2b3;--border:#2a3348;--primary:#818cf8;--primary-hover:#a5b4fc;--primary-soft:#232c4a;--shadow:0 1px 3px #0006;--shadow-lg:0 8px 24px #00000073}}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{background:var(--bg);color:var(--text);margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,PingFang SC,Microsoft YaHei,sans-serif;font-size:16px;line-height:1.65}img{max-width:100%}a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}.container{max-width:var(--max-w);margin:0 auto;padding:0 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(width<=720px){.footer-grid{grid-template-columns:1fr 1fr}.hero{padding-top:38px}.tool-panel{padding:16px}}
