:root{
  --bg:#f7f7f4;
  --paper:#ffffff;
  --ink:#171717;
  --muted:#6b6b67;
  --line:#e6e6df;
  --accent:#2f6f5e;
  --accent-soft:#eaf3ef;
  --max:980px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Hiragino Kaku Gothic ProN","Yu Gothic",Meiryo,sans-serif;color:var(--ink);background:var(--bg);line-height:1.9}
a{color:inherit;text-decoration:none}
a:hover{opacity:.72}
img{max-width:100%;display:block}
.container{width:min(calc(100% - 36px),var(--max));margin:0 auto}
.site-header{background:rgba(255,255,255,.94);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20;backdrop-filter:blur(10px)}
.header-inner{min-height:74px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{font-weight:800;letter-spacing:.06em;font-size:20px}
.brand small{display:block;font-size:10px;letter-spacing:.18em;color:var(--muted);font-weight:600;margin-top:2px}
.nav{display:flex;gap:24px;font-size:14px;color:#30302d}
.hero{padding:96px 0 80px;background:linear-gradient(135deg,#eff5f2,#f8f8f4 60%,#edf0e8)}
.kicker{font-size:12px;letter-spacing:.18em;text-transform:uppercase;color:var(--accent);font-weight:800;margin-bottom:16px}
h1{font-size:clamp(38px,7vw,72px);line-height:1.18;margin:0 0 24px;letter-spacing:-.03em}
.hero p{max-width:680px;font-size:17px;color:#4c4c48;margin:0}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:30px}
.btn{display:inline-block;padding:11px 18px;border-radius:999px;border:1px solid var(--line);background:#fff;font-weight:700;font-size:14px}
.btn.primary{background:var(--accent);color:#fff;border-color:var(--accent)}
main section{padding:68px 0}
.section-title{font-size:30px;margin:0 0 10px;letter-spacing:-.02em}
.section-lead{margin:0 0 30px;color:var(--muted)}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.card{background:var(--paper);border:1px solid var(--line);border-radius:16px;padding:24px}
.card h3{margin:0 0 8px;font-size:18px}.card p{margin:0;color:var(--muted)}
.game-panel{display:grid;grid-template-columns:1.15fr .85fr;background:#17231f;color:#fff;border-radius:22px;overflow:hidden}
.game-copy{padding:42px}.game-copy h2{font-size:38px;line-height:1.35;margin:0 0 16px}.game-copy p{color:#d2ddd8;margin:0}
.game-art{min-height:320px;background:radial-gradient(circle at 30% 30%,#496e61,transparent 26%),radial-gradient(circle at 70% 60%,#8c7859,transparent 24%),linear-gradient(145deg,#263c34,#111815);display:grid;place-items:center;padding:30px;text-align:center;color:#dbe7e2;letter-spacing:.08em}
.page-hero{padding:70px 0 44px;background:#f0f2ed;border-bottom:1px solid var(--line)}
.page-hero h1{font-size:44px;margin-bottom:10px}.page-hero p{margin:0;color:var(--muted)}
.article{background:#fff;border:1px solid var(--line);border-radius:18px;padding:clamp(24px,5vw,52px);margin:38px auto 70px}
.article h2{font-size:27px;margin:48px 0 12px}.article h2:first-child{margin-top:0}.article h3{font-size:19px;margin:30px 0 8px}.article p{margin:0 0 16px}.article ul{padding-left:1.4em}.article li{margin:7px 0}
.toc{background:var(--accent-soft);border-radius:14px;padding:20px 22px;margin:24px 0 32px}.toc strong{display:block;margin-bottom:8px}.toc a{display:block;color:var(--accent);font-weight:700;font-size:14px}
.info-table{display:grid;grid-template-columns:180px 1fr;border-top:1px solid var(--line)}
.info-table>div{padding:16px 10px;border-bottom:1px solid var(--line)}.info-table .label{font-weight:700;color:#3b3b38}
.contact-box{background:#fff;border:1px solid var(--line);border-radius:18px;padding:32px}.contact-box a{color:var(--accent);font-weight:700}
.notice{font-size:13px;color:var(--muted);background:#fafaf7;border-left:3px solid var(--accent);padding:12px 14px;margin:22px 0}
.footer{border-top:1px solid var(--line);background:#fff;padding:38px 0 52px}.footer-inner{display:flex;justify-content:space-between;gap:24px;align-items:flex-end}.footer-nav{display:flex;gap:18px;flex-wrap:wrap;color:var(--muted);font-size:13px}.copyright{font-size:12px;color:#8a8a85;margin-top:8px}
@media(max-width:760px){.header-inner{align-items:flex-start;flex-direction:column;padding:16px 0}.nav{gap:14px;flex-wrap:wrap}.hero{padding:62px 0}.grid{grid-template-columns:1fr}.game-panel{grid-template-columns:1fr}.game-copy{padding:28px}.game-copy h2{font-size:30px}.info-table{grid-template-columns:1fr}.info-table .label{padding-bottom:2px}.info-table .label+div{padding-top:2px}.footer-inner{align-items:flex-start;flex-direction:column}}