:root{
  --bg:#ffffff; --text:#101010; --muted:#6b7280; --banner:#000; --pink:#ff4fd8; --yellow:#fff7a8; --border:#e7e7ea;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Inter,"Helvetica Neue",Arial,sans-serif;line-height:1.45}
.container{width:min(1120px,92%);margin:0 auto}
.banner{background:var(--banner);color:#fff;padding:16px 0 14px;border-bottom:3px solid var(--pink)}
.banner-inner{display:flex;align-items:center;gap:14px}
.logo{height:44px;width:auto}
.titles h1{margin:0 0 4px;font-size:26px;font-weight:800;letter-spacing:.2px}
.titles .sub{margin:0;color:#e5e7eb}
.diag{position:sticky;top:0;z-index:5;background:#fff7a8;border-bottom:2px solid #000;padding:6px 0}
.diag small{display:block;text-align:center;font-weight:800}
.menu{display:flex;flex-wrap:wrap;gap:8px;margin:8px 0 16px}
.menu a{padding:8px 10px;border:1px solid var(--border);border-radius:10px;text-decoration:none;color:var(--text);font-weight:700}
.menu a:hover{background:var(--yellow)}
h2{font-size:22px;margin:0 0 10px}
h3{font-size:18px;margin:18px 0 10px}
.formula-list ul{margin:6px 0 10px 18px}
.formula-list li{margin:6px 0}
.formula-list code{background:#fff0fb;border:1px solid var(--pink);padding:2px 6px;border-radius:6px}
.note{font-size:13px;color:var(--muted);margin-top:4px}
.card{border:1px solid var(--border);border-radius:14px;padding:12px;margin:14px 0;background:#fff}
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.grid.grid-4{grid-template-columns:repeat(4,1fr)}
.card label{display:flex;flex-direction:column;gap:4px;font-size:14px}
.card input,.card select,.card button{padding:10px 12px;border:1px solid var(--border);border-radius:10px;font-size:14px}
.card button{font-weight:800;background:#fff;border-color:#000;cursor:pointer}
.card button:hover{background:var(--yellow)}
.table-wrap{overflow:auto;border:1px solid var(--border);border-radius:10px;margin-top:8px}
table{border-collapse:collapse;width:100%}
thead th{background:#000;color:#fff;padding:10px;text-align:left}
tbody td,tfoot td{border-top:1px solid var(--border);padding:10px}
tfoot .total td{font-weight:800}
.out{margin-top:8px;padding:10px;background:#fff8fd;border:1px dashed var(--pink);border-radius:10px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace}
.out strong{color:var(--pink);font-weight:900}
.hint{font-size:12px;color:#6b7280;margin:6px 0 0 2px}
.footer{border-top:3px solid var(--pink);padding:12px 0;margin-top:20px;color:var(--muted)}
@media (max-width:870px){.grid{grid-template-columns:repeat(2,1fr)}.grid.grid-4{grid-template-columns:repeat(2,1fr)}}
@media (max-width:540px){.grid{grid-template-columns:1fr}.grid.grid-4{grid-template-columns:1fr}}