@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;500;700&display=swap');
*{margin:0;padding:0;box-sizing:border-box;-webkit-font-smoothing:antialiased}
:root{--ink:#16150F;--gray:#44423A;--faint:#86826F;--hair:#D6D2C4;--paper:#FBFAF6;--red:#8C1D18}
body{background:var(--paper);color:var(--ink);font-family:'Noto Sans JP',sans-serif;font-weight:400;line-height:1.95}
a{color:inherit}
.mono{font-family:'JetBrains Mono',monospace}
.page{max-width:1060px;margin:0 auto;padding:0 56px}
.top{display:flex;justify-content:space-between;align-items:baseline;padding:32px 0 10px}
.top .nm{font-size:15px;letter-spacing:.34em;font-weight:600;text-decoration:none}
.top .fol{font-family:'JetBrains Mono',monospace;font-size:10px;color:var(--faint);letter-spacing:.1em}
.rule-h{height:4px;background:var(--ink)}
.rule-t{height:1px;background:var(--ink);margin-top:2px}
.grid{display:grid;grid-template-columns:158px 1fr;gap:0 54px}
.rail{padding-top:52px}
.rail .lb{font-family:'JetBrains Mono',monospace;font-size:9.5px;letter-spacing:.16em;color:var(--faint);padding-bottom:7px;border-bottom:1px solid var(--hair);margin-bottom:11px}
.rail nav a{display:block;font-size:13px;color:var(--gray);text-decoration:none;padding:4px 0}
.rail .mt{margin-top:30px;font-size:10.5px;color:var(--faint);line-height:1.9}
main{padding:52px 0 0;max-width:620px}
h2.sec{font-size:12px;letter-spacing:.28em;font-weight:600;margin-bottom:2px}
.secsub{font-family:'JetBrains Mono',monospace;font-size:9.5px;color:var(--faint);letter-spacing:.1em;margin-bottom:16px}
section{margin-top:58px}
.item{padding:19px 0;border-top:1px solid var(--hair)}
.item:last-child{border-bottom:1px solid var(--hair)}
.item .st{font-family:'JetBrains Mono',monospace;font-size:9.5px;letter-spacing:.18em;color:var(--red);display:block;margin-bottom:5px}
.item h3{font-size:17px;font-weight:600;line-height:1.62;margin-bottom:6px}
.item h3 a{text-decoration:none;background-image:linear-gradient(var(--hair),var(--hair));background-size:100% 1px;background-repeat:no-repeat;background-position:0 92%}
.item p{font-size:13.5px;color:var(--gray);line-height:2.0}
p.body{font-size:15px;line-height:2.15;color:var(--gray);margin-bottom:15px;text-indent:1em}
p.body b{color:var(--ink);font-weight:600}
p.body .num{font-family:'JetBrains Mono',monospace;font-weight:600;color:var(--ink);font-size:15px}
.pol div{padding:11px 0;border-top:1px solid var(--hair);display:grid;grid-template-columns:14px 1fr;gap:14px}
.pol i{font-style:normal;font-family:'JetBrains Mono',monospace;font-size:10px;color:var(--faint);padding-top:4px}
.pol b{font-size:14px;font-weight:600;display:block;margin-bottom:1px}
.pol span{font-size:13px;color:var(--gray);line-height:1.9}
.tail{margin-top:64px;padding:22px 0 12px;border-top:4px solid var(--ink)}
.tail p{font-size:13.5px;color:var(--gray);line-height:2.0}
.tail a{color:var(--red);text-decoration:none;border-bottom:1px solid var(--red)}
footer{padding:14px 0 56px;font-size:11.5px;color:var(--faint);line-height:2.0}
table.d{width:100%;border-collapse:collapse;margin:8px 0 16px}
table.d th,table.d td{border-top:1px solid var(--hair);padding:11px 10px;font-size:13px;text-align:left;vertical-align:top}
table.d thead th{border-top:2px solid var(--ink);border-bottom:1px solid var(--ink);font-size:10.5px;letter-spacing:.1em;color:var(--gray);font-weight:600}
table.d tbody tr:last-child td{border-bottom:1px solid var(--hair)}
table.d td.n{font-family:'JetBrains Mono',monospace;font-weight:500;text-align:right;white-space:nowrap}
.cap{font-size:11.5px;color:var(--faint);line-height:1.85;margin-top:-8px;margin-bottom:22px}
@media(max-width:820px){
  .page{padding:0 22px}
  .grid{grid-template-columns:1fr;gap:0}
  .rail{padding-top:26px;border-bottom:1px solid var(--hair);padding-bottom:18px}
  .rail nav{display:flex;flex-wrap:wrap;gap:0 18px}
  .rail .mt{margin-top:14px}
  main{padding:30px 0 0}
  h1{font-size:27px!important}
}


/* 見出し・数字は明朝のまま（研究所らしさを維持） */
h1,h2,h3,.item h3,.pol b,.top .nm{font-family:'Noto Serif JP',serif;}
p.body b{font-weight:700}
.item h3{font-weight:600}


/* ===== 本体サイト共通ヘッダー（研究所ページ上部・2026-10-15） ===== */
.hp-mainbar{background:#fff;border-bottom:1px solid #EEE;font-family:'Noto Sans JP',sans-serif}
.hp-mainbar .in{max-width:1100px;margin:0 auto;padding:0 24px;height:58px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.hp-mainbar .lg{font-size:13px;font-weight:700;color:#1A1A1A;text-decoration:none;letter-spacing:.02em;white-space:nowrap}
.hp-mainbar nav{display:flex;align-items:center;gap:18px;font-size:12.5px;white-space:nowrap}
.hp-mainbar nav a{color:#444;text-decoration:none}
.hp-mainbar nav a:hover{color:#1A1A1A}
.hp-mainbar nav a.cur{color:#B8533D;font-weight:600}
.hp-mainbar nav a.doc{color:#B8533D;border:1px solid #B8533D;border-radius:999px;padding:6px 14px}
.hp-mainbar nav a.cta{background:#B8533D;color:#fff;border-radius:999px;padding:7px 15px}
@media(max-width:900px){
  .hp-mainbar nav a.n{display:none}
  .hp-mainbar nav{gap:10px;font-size:12px}
  .hp-mainbar .in{height:52px;padding:0 18px}
}