:root{
  --bg:#f6f6f3;
  --paper:#ffffff;
  --ink:#16181c;
  --sub:#5c6470;
  --line:#e3e2dc;
  --navy:#1b2a44;
  --navy-deep:#0f1a2c;
  --gold:#a98a3f;
  --mincho:"Hiragino Mincho ProN","Yu Mincho","YuMincho","Noto Serif JP",serif;
  --gothic:"Hiragino Sans","Hiragino Kaku Gothic ProN","Yu Gothic Medium","Noto Sans JP",sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
body{
  font-family:var(--gothic);background:var(--bg);color:var(--ink);
  line-height:2.05;-webkit-font-smoothing:antialiased;font-size:15px;
}
a{color:inherit}
.wrap{width:min(860px,88vw);margin:0 auto}

header{
  position:sticky;top:0;z-index:50;
  background:rgba(246,246,243,.94);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
header .inner{
  width:min(860px,88vw);margin:0 auto;height:70px;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
}
header img{height:22px;width:auto;display:block}
header nav{display:flex;gap:26px;font-size:13px;letter-spacing:.04em;color:var(--sub)}
header nav a{text-decoration:none;transition:color .2s}
header nav a:hover{color:var(--navy)}
@media(max-width:700px){
  header .inner{height:58px}
  header img{height:17px}
  header nav{gap:14px;font-size:11.5px}
}

.page-head{
  background:linear-gradient(160deg, var(--navy-deep) 0%, var(--navy) 100%);
  color:#fff;padding:72px 0 62px;
}
.page-head .rule{width:36px;height:1px;background:var(--gold);margin-bottom:24px}
.page-head h1{
  font-family:var(--mincho);font-weight:400;
  font-size:clamp(21px,3.2vw,30px);letter-spacing:.07em;line-height:1.6;
}
.page-head .en{
  margin-top:14px;font-size:11px;letter-spacing:.24em;
  color:rgba(255,255,255,.42);text-transform:uppercase;
}

main{padding:70px 0 90px}
main .meta{
  font-size:13px;color:var(--sub);margin-bottom:36px;
  padding-bottom:22px;border-bottom:1px solid var(--line);
}
main h2{
  font-family:var(--mincho);font-weight:400;font-size:18px;
  letter-spacing:.05em;line-height:1.7;
  margin:46px 0 14px;padding-left:14px;border-left:2px solid var(--gold);
}
main > .wrap > h2:first-child{margin-top:0}
main p{margin-bottom:1.25em;line-height:2.1}
main p:last-child{margin-bottom:0}
main ul{margin:0 0 1.25em 1.4em}
main li{margin-bottom:.5em;line-height:2.05}
main .box{
  margin-top:36px;padding:24px 26px;background:var(--paper);
  border:1px solid var(--line);border-left:2px solid var(--gold);
  font-size:14px;color:var(--sub);line-height:2.05;
}
main .box strong{color:var(--ink);font-weight:600}
main .sig{margin-top:44px;font-size:14px;color:var(--sub);text-align:right}

footer{background:#101725;color:rgba(255,255,255,.5);padding:44px 0;font-size:12.5px}
footer .inner{
  width:min(860px,88vw);margin:0 auto;
  display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap;
}
footer nav{display:flex;gap:22px;flex-wrap:wrap}
footer a{text-decoration:none;transition:color .2s}
footer a:hover{color:#fff}