:root{--ink:#17243b;--muted:#607086;--bg:#f5f7fb;--card:#fff;--line:#dce3ec;--blue:#275efe;--blue2:#173db6;--teal:#0b8f78;--danger:#b42318;--shadow:0 14px 40px rgba(30,50,90,.09)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.65 system-ui,-apple-system,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}a{color:inherit}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #8eb0ff;outline-offset:2px}.skip{position:absolute;left:-999px;top:8px}.skip:focus{left:8px;z-index:99;background:#fff;padding:10px 14px;border-radius:10px}.wrap{width:min(1080px,calc(100% - 32px));margin:auto}.top{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10}.topin{min-height:66px;display:flex;align-items:center;gap:22px}.brand{text-decoration:none;font-weight:850;font-size:1.2rem}.brand i{font-style:normal;color:var(--blue)}nav{display:flex;gap:18px;margin-left:auto}nav a{text-decoration:none;color:var(--muted)}.lang{padding:8px 11px;border:1px solid var(--line);border-radius:10px;text-decoration:none}.hero{padding:54px 0 22px}.eyebrow{color:var(--blue);font-weight:750}.hero h1{font-size:clamp(2rem,6vw,3.5rem);line-height:1.08;letter-spacing:-.04em;margin:.25em 0}.hero p{max-width:650px;color:var(--muted);font-size:1.08rem}.search{display:flex;max-width:650px;margin-top:26px}.search input{width:100%;padding:16px 18px;border:1px solid var(--line);border-radius:14px;font:inherit;background:#fff}.section{padding:24px 0}.section h2{font-size:1.45rem;margin:0 0 14px}.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:20px;text-decoration:none;box-shadow:0 5px 18px rgba(30,50,90,.04);transition:.18s}.card:hover{transform:translateY(-2px);border-color:#9fb4ed;box-shadow:var(--shadow)}.card b{display:block;font-size:1.05rem}.card span{display:block;color:var(--muted);font-size:.9rem;margin-top:5px}.work{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(280px,.85fr);gap:22px;align-items:start}.panel,.content{background:#fff;border:1px solid var(--line);border-radius:20px;padding:24px;box-shadow:var(--shadow)}.field{margin:0 0 16px}.field label{display:block;font-weight:700;margin-bottom:6px}.field small{display:block;color:var(--muted);margin-top:4px}.field input,.field select{width:100%;min-height:48px;border:1px solid #bbc7d6;border-radius:10px;padding:10px 12px;font:inherit;background:#fff}.row{display:grid;grid-template-columns:1fr 1fr;gap:12px}.btns{display:flex;gap:10px;flex-wrap:wrap}.btn{border:0;border-radius:11px;padding:12px 18px;background:var(--blue);color:#fff;font:700 1rem inherit;cursor:pointer}.btn.secondary{background:#edf1f8;color:var(--ink)}.error{display:none;color:var(--danger);background:#fff1f0;border:1px solid #f7c1bc;border-radius:10px;padding:10px 12px;margin:0 0 14px}.result{min-height:190px;background:linear-gradient(135deg,#173db6,#2764ff);color:#fff;border-radius:18px;padding:24px}.result .big{font-size:2rem;font-weight:850;line-height:1.15}.result dl{margin:18px 0 0}.result div{display:flex;justify-content:space-between;border-top:1px solid rgba(255,255,255,.22);padding:9px 0}.result dd{margin:0;font-weight:750}.note{background:#edf8f5;border-left:4px solid var(--teal);padding:13px 15px;border-radius:8px;margin:18px 0}.crumbs{font-size:.9rem;color:var(--muted);padding-top:24px}.pagehead{padding:24px 0}.pagehead h1{font-size:clamp(1.9rem,5vw,2.8rem);line-height:1.15;margin:.2em 0}.pagehead p{color:var(--muted);max-width:720px}.article{max-width:780px}.article h2{margin-top:1.8em}.article li{margin:.4em 0}.related{margin-top:24px}.source{font-size:.9rem;color:var(--muted)}footer{margin-top:50px;padding:35px 0;border-top:1px solid var(--line);background:#fff}.foot{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:24px}.foot a{display:block;color:var(--muted);text-decoration:none;margin:5px 0}.mobilebar{display:none}.badge{display:inline-block;padding:4px 9px;background:#e8efff;color:#2147af;border-radius:999px;font-size:.78rem;font-weight:750}.hidden{display:none!important}@media(max-width:800px){body{padding-bottom:68px}.wrap{width:min(100% - 24px,680px)}nav{display:none}.topin{min-height:58px}.lang{margin-left:auto}.hero{padding:34px 0 12px}.grid{grid-template-columns:1fr 1fr}.work{grid-template-columns:1fr}.panel,.content{padding:18px;border-radius:16px}.row{grid-template-columns:1fr}.btn{min-height:48px;flex:1}.foot{grid-template-columns:1fr}.mobilebar{display:grid;grid-template-columns:repeat(4,1fr);position:fixed;left:0;right:0;bottom:0;background:#fff;border-top:1px solid var(--line);z-index:20}.mobilebar a{text-align:center;padding:11px 4px;text-decoration:none;font-size:.82rem}}@media(max-width:420px){.grid{grid-template-columns:1fr}.hero h1{font-size:2.25rem}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}