:root{
  --ink:#15171d; --navy:#10233f;
  --gold:#c2a266; --gold-lt:#e0c894; --gold-dim:#8d7442;
  --paper:#f7f5f0; --paper-2:#efece4; --line:#ddd7c9; --gray:#6b6f7a;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:"Noto Sans JP",-apple-system,BlinkMacSystemFont,"Hiragino Sans",sans-serif;
  color:var(--ink);background:var(--paper);line-height:2;font-size:16px;
  -webkit-font-smoothing:antialiased;padding-bottom:72px}
img{max-width:100%;display:block}
a{color:var(--navy)}

/* header */
.head{position:sticky;top:0;z-index:60;background:rgba(21,23,29,.94);backdrop-filter:blur(8px);
  border-bottom:1px solid rgba(194,162,102,.3)}
.head .in{max-width:1180px;margin:0 auto;padding:0 18px;height:62px;display:flex;align-items:center;gap:22px}
.head .logo{display:flex;align-items:center;gap:11px;text-decoration:none;white-space:nowrap}
.head .logo .mk{height:32px;width:auto}
.head .logo .wd img{height:15px;width:auto;display:block}
.head .logo small{display:block;font-size:9px;letter-spacing:.34em;color:var(--gold);font-weight:700;margin-top:4px}
.head nav{margin-left:auto;display:flex;align-items:center;gap:18px}
.head nav a{color:#ddd8cc;text-decoration:none;font-size:13px;font-weight:500;white-space:nowrap}
.head nav a:hover{color:var(--gold-lt)}
.head .btn-entry{background:linear-gradient(180deg,var(--gold-lt),var(--gold));color:#1a1408;
  padding:10px 20px;border-radius:2px;font-weight:700;font-size:13.5px;letter-spacing:.06em}
@media(max-width:820px){.head nav a:not(.btn-entry){display:none}}

/* hero */
.a-hero{background:var(--ink);color:#fff;padding:52px 0 46px}
.a-hero .in{max-width:800px;margin:0 auto;padding:0 22px}
.a-hero .k{font-size:11px;letter-spacing:.24em;color:var(--gold);font-weight:700}
.a-hero h1{font-family:"Shippori Mincho B1",serif;font-weight:700;
  font-size:clamp(24px,4.4vw,38px);line-height:1.5;margin:16px 0 0;letter-spacing:.01em}
.a-hero .sub{margin:18px 0 0;color:#c3beb2;font-size:15px;line-height:1.95}

/* body */
main{max-width:800px;margin:0 auto;padding:16px 22px 70px}
.bc{font-size:12.5px;color:var(--gray);margin:24px 0 30px}
.bc a{color:var(--gray)}
article h2{font-family:"Shippori Mincho B1",serif;font-weight:700;color:var(--navy);
  font-size:clamp(20px,3.2vw,26px);line-height:1.6;margin:56px 0 14px;
  padding-left:16px;border-left:4px solid var(--gold)}
article h2:first-child{margin-top:0}
article h3{font-size:17.5px;font-weight:700;margin:36px 0 8px;line-height:1.7;
  padding-bottom:8px;border-bottom:1px dotted var(--line)}
article p{margin:0 0 1.3em}
article strong{font-weight:700;background:linear-gradient(transparent 62%,rgba(194,162,102,.38) 62%)}
article ul{margin:0 0 1.4em;padding-left:1.4em}
article li{margin-bottom:.5em}
article table{width:100%;border-collapse:collapse;margin:0 0 1.6em;font-size:15px;background:#fff}
article th,article td{text-align:left;vertical-align:top;padding:13px 16px;
  border:1px solid var(--line);line-height:1.85}
article th{background:var(--paper-2);color:var(--navy);font-weight:700;font-size:14px;white-space:nowrap}
.tbl-wrap{overflow-x:auto}

/* cta */
.cta-band{background:var(--navy);color:#fff;padding:34px 32px;margin:52px 0;text-align:center}
.cta-band h3{font-family:"Shippori Mincho B1",serif;font-size:clamp(18px,3vw,24px);
  margin:0 0 12px;line-height:1.6;border:0;padding:0;font-weight:700}
.cta-band p{margin:0 0 22px;font-size:14.5px;color:#c9d1de;line-height:1.95}
.cta-band a{display:inline-block;background:linear-gradient(180deg,var(--gold-lt),var(--gold));
  color:#1a1408;text-decoration:none;font-weight:700;padding:16px 40px;border-radius:2px;
  font-size:15px;letter-spacing:.05em}
@media(max-width:600px){.cta-band{padding:26px 20px}.cta-band a{padding:15px 24px}}

/* related */
.related{border:1px solid var(--line);background:#fff;padding:24px 26px;margin:44px 0 0}
.related b{display:block;font-size:14px;color:var(--navy);margin-bottom:14px;letter-spacing:.04em}
.related a{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink);
  padding:12px 0;border-top:1px dotted var(--line);font-size:14.5px;line-height:1.7}
.related a:hover{color:var(--navy)}
.related a .ar{margin-left:auto;color:var(--gold);flex:none}

/* index list */
.list{display:grid;gap:16px;margin-top:8px}
.list a{display:block;background:#fff;border:1px solid var(--line);border-left:3px solid var(--gold);
  padding:22px 24px;text-decoration:none;color:var(--ink)}
.list a:hover{border-left-color:var(--navy)}
.list .t{font-family:"Shippori Mincho B1",serif;font-size:18.5px;font-weight:700;
  color:var(--navy);line-height:1.6;margin-bottom:8px}
.list .d{font-size:14px;color:var(--gray);line-height:1.85}

/* sticky */
.sticky{position:fixed;left:0;right:0;bottom:0;z-index:70;background:rgba(21,23,29,.96);
  border-top:1px solid rgba(194,162,102,.35);padding:10px 14px;display:flex;gap:10px;backdrop-filter:blur(8px)}
.sticky a{flex:1;text-align:center;padding:14px 8px;text-decoration:none;font-weight:700;
  font-size:13.5px;border-radius:2px;letter-spacing:.04em}
.sticky .p{background:linear-gradient(180deg,var(--gold-lt),var(--gold));color:#1a1408}
.sticky .s{border:1px solid rgba(255,255,255,.4);color:#fff}

footer{background:#0d0f14;color:#8f8b81;font-size:12.5px;padding:40px 0 96px}
footer .in{max-width:800px;margin:0 auto;padding:0 22px}
footer .lg{height:60px;width:auto;margin-bottom:14px;opacity:.92}
footer a{color:#b3aea3;text-decoration:none}
footer a:hover{color:var(--gold-lt)}
footer nav{margin-top:12px;display:flex;flex-wrap:wrap;gap:8px 18px}