:root{--ink:#19243b;--muted:#6e788c;--line:#e4e8ef;--brand:#293f86;--soft:#f7f8fc;--gold:#a87b36}*{box-sizing:border-box}body{margin:0;background:#f6f7fb;color:var(--ink);font-family:Inter,system-ui,-apple-system,Segoe UI,sans-serif}.num-wrap{max-width:1120px;margin:auto;padding:0 20px}header{min-height:76px;display:flex;justify-content:space-between;align-items:center}header>a{color:var(--ink);text-decoration:none;display:flex;gap:9px;align-items:center}header small{display:block;color:var(--muted);font-size:11px}header nav{display:flex;gap:18px}header nav a{color:#526078;text-decoration:none;font-weight:650;font-size:14px}.num-hero{padding:52px 0 26px}.num-hero span,.num-title span,.num-section-head span{font-size:12px;letter-spacing:.13em;font-weight:800;color:var(--brand)}.num-hero h1{font:700 clamp(38px,6vw,64px)/1 Georgia,serif;margin:10px 0 14px}.num-hero p{max-width:760px;color:var(--muted);font-size:17px;line-height:1.65}.num-sheet{background:#fff;border:1px solid var(--line);border-radius:22px;padding:24px;margin:18px 0}.num-sheet form{display:grid;grid-template-columns:1.3fr .8fr auto;gap:14px;align-items:end}.num-sheet label{display:block;font-weight:800;font-size:13px;margin-bottom:7px}.num-sheet label small{color:var(--muted);font-weight:500}.num-sheet input{width:100%;height:48px;border:1px solid #ccd4e3;border-radius:12px;padding:0 13px;font:inherit}.num-sheet button{height:48px;border:0;border-radius:12px;padding:0 20px;background:var(--brand);color:#fff;font-weight:800}.num-error{color:#a32222;font-weight:700}.num-title{margin:34px 0 16px}.num-title h2{font:700 38px Georgia,serif;margin:6px 0}.num-title p{color:var(--muted)}.num-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.num-card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:20px}.num-card>small{color:var(--muted);font-weight:700}.num-card>strong{display:block;font:700 54px Georgia,serif;color:var(--brand);margin:7px 0}.num-card h3{font-size:17px;margin:0 0 8px}.num-card p{color:var(--muted);font-size:13px;line-height:1.5}.num-card dl{margin:14px 0 0;border-top:1px solid var(--line)}.num-card dl div{padding-top:10px}.num-card dt{font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted)}.num-card dd{margin:4px 0 0;font-size:13px;line-height:1.45}.num-section-head{display:flex;justify-content:space-between;gap:20px;align-items:end}.num-section-head h2{font:700 30px Georgia,serif;margin:5px 0}.num-section-head p{color:var(--muted)}.num-cycle{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:16px}.num-cycle article{background:var(--soft);border-radius:16px;padding:18px}.num-cycle small{color:var(--muted)}.num-cycle strong{display:block;font:700 42px Georgia,serif;color:var(--brand)}.num-cycle p{font-size:13px;line-height:1.5}.num-loshu{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:18px;max-width:560px}.num-loshu article{min-height:100px;border:1px solid var(--line);border-radius:16px;display:flex;flex-direction:column;align-items:center;justify-content:center}.num-loshu strong{font:700 28px Georgia,serif}.num-loshu span{color:var(--gold);letter-spacing:3px;margin:5px 0}.num-loshu small{color:var(--muted)}.num-explain{display:grid;grid-template-columns:1fr 1fr;gap:18px;color:#536079;line-height:1.65}.num-note{background:#fffaf1;border-left:4px solid #c9974f;padding:16px 18px;border-radius:0 12px 12px 0;color:#6e604d}.num-wrap footer{text-align:center;color:var(--muted);font-size:12px;padding:30px 0 40px}@media(max-width:840px){header nav{display:none}.num-sheet form{grid-template-columns:1fr}.num-grid{grid-template-columns:1fr 1fr}.num-cycle{grid-template-columns:1fr}.num-explain{grid-template-columns:1fr}}@media(max-width:520px){.num-wrap{padding:0 12px}.num-grid{grid-template-columns:1fr}.num-hero{padding-top:28px}.num-sheet{padding:17px}.num-section-head{align-items:start;flex-direction:column}.num-loshu{gap:7px}.num-loshu article{min-height:82px}}
