:root{--brand:#e60012;--brand-ink:#a3000d;--ink:#1a1a1a;--ink-soft:#444;--ink-dim:#7a7d80;--line:#ececed;--bg:#fafafb}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:"Noto Sans JP",sans-serif;line-height:1.9;-webkit-font-smoothing:antialiased}
a{color:inherit}
.hd{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:14px 22px;background:rgba(255,255,255,.86);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:900;letter-spacing:.06em;color:var(--ink)}
.brand small{display:block;font-family:"Plus Jakarta Sans";font-weight:700;font-size:8px;letter-spacing:.28em;color:var(--ink-dim);line-height:1}
.brand b{font-size:19px}
.hd-nav{display:flex;align-items:center;gap:18px;font-size:14px;font-weight:700}
.hd-nav a{text-decoration:none;color:var(--ink-soft)}
.hd-cta{background:var(--brand);color:#fff!important;padding:9px 16px;border-radius:999px;font-size:13px}
.bc{font-size:12.5px;color:var(--ink-dim);margin:0 0 18px;font-family:"Plus Jakarta Sans","Noto Sans JP",sans-serif}
.bc a{color:var(--brand-ink);text-decoration:none}
.article{max-width:760px;margin:0 auto;padding:40px 22px 80px}
.article h1{font-size:clamp(1.5rem,3.4vw,2.15rem);line-height:1.45;margin:0 0 14px;font-weight:900}
.meta{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-bottom:30px;padding-bottom:22px;border-bottom:1px solid var(--line)}
.meta time{font-family:"Plus Jakarta Sans";font-weight:700;font-size:13px;letter-spacing:.06em;color:var(--ink-dim)}
.meta .tags span{font-size:12px;font-weight:700;color:var(--brand-ink);margin-right:8px}
.body{font-size:1.02rem;color:#222}
.body h2{font-size:1.32rem;margin:42px 0 14px;padding-left:14px;border-left:5px solid var(--brand);line-height:1.5;font-weight:800}
.body h3{font-size:1.1rem;margin:28px 0 10px;font-weight:800}
.body p{margin:0 0 18px}
.body ul,.body ol{margin:0 0 20px;padding-left:1.4em}
.body li{margin-bottom:9px}
.body strong{color:var(--brand-ink)}
.cite{margin:34px 0 0;padding:16px 18px;background:#fff;border:1px solid var(--line);border-radius:10px;font-size:13px;color:var(--ink-soft);line-height:1.8}
.cta-box{margin:34px 0;padding:26px 26px;background:linear-gradient(135deg,#fff5f0,#fff);border:1px solid #ffd9cf;border-radius:16px}
.cta-box p{margin:0 0 14px}
.cta-btn{display:inline-flex;align-items:center;gap:8px;background:var(--brand);color:#fff;text-decoration:none;font-weight:800;padding:12px 24px;border-radius:999px;box-shadow:0 16px 30px -16px rgba(230,0,18,.6)}
.related{margin-top:48px;border-top:1px solid var(--line);padding-top:24px}
.related h2{font-size:1.05rem;font-weight:800;margin:0 0 14px}
.related ul{list-style:none;padding:0;margin:0}
.related li{margin-bottom:11px}
.related a{color:var(--brand-ink);text-decoration:none;font-weight:700}
.related .all{margin-top:18px}
/* index */
.col-index{max-width:1020px;margin:0 auto;padding:40px 22px 80px}
.col-head{margin-bottom:30px}
.col-head .sec-tag{display:inline-block;font-family:"Plus Jakarta Sans";font-weight:800;font-size:12px;letter-spacing:.22em;color:var(--brand-ink);margin-bottom:10px}
.col-head h1{font-size:clamp(1.7rem,4vw,2.5rem);margin:0 0 12px;font-weight:900}
.col-head .accent{color:var(--brand)}
.col-head p{color:var(--ink-soft);max-width:640px}
.col-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:22px}
.col-card{display:flex;flex-direction:column;gap:11px;padding:26px;border:1px solid var(--line);border-radius:18px;background:#fff;text-decoration:none;color:inherit;transition:transform .3s,box-shadow .3s,border-color .3s}
.col-card:hover{transform:translateY(-5px);box-shadow:0 24px 50px -30px rgba(163,0,13,.5);border-color:var(--brand)}
.col-meta time{font-family:"Plus Jakarta Sans";font-weight:700;font-size:12px;letter-spacing:.06em;color:var(--ink-dim)}
.col-card h2{font-size:1.12rem;line-height:1.5;font-weight:800;margin:0}
.col-card p{font-size:.9rem;color:var(--ink-soft);line-height:1.8;margin:0}
.col-tags{font-size:.78rem;font-weight:700;color:var(--brand-ink)}
.col-more{margin-top:auto;font-size:.9rem;font-weight:800;color:var(--brand-ink)}
/* footer */
.ft{background:#141414;color:#cfd1d2;padding:54px 22px;text-align:center}
.ft .brand{justify-content:center;color:#fff}
.ft .brand small{color:#8f9295}
.ft p{max-width:560px;margin:18px auto 0;font-size:.9rem;line-height:1.9;color:#9da0a2}
.ft p a{color:#ff7a66;text-decoration:none;font-weight:700}
.ft small{display:block;margin-top:24px;font-size:12px;color:#74777a}
@media(max-width:560px){.hd-nav a:not(.hd-cta){display:none}}