:root{--bg:#070b12;--panel:#101823;--text:#f7f8fb;--muted:rgba(247,248,251,.68);--line:rgba(255,255,255,.11);--gold:#e8c27b}*{box-sizing:border-box}html{background:var(--bg);scroll-behavior:smooth}body{margin:0;color:var(--text);background:radial-gradient(circle at 50% -10%,#1b2b3e,transparent 42%),linear-gradient(155deg,#070b12,#0d151f);font-family:Inter,system-ui,-apple-system,"Segoe UI",sans-serif;line-height:1.9}.shell{width:min(920px,calc(100% - 36px));margin:auto}.topbar{min-height:82px;display:flex;align-items:center;justify-content:space-between;gap:18px;border-bottom:1px solid var(--line)}.brand{color:#fff;text-decoration:none;font-family:"Noto Serif JP",Georgia,serif;font-size:18px}.back{color:var(--muted);text-decoration:none;font-size:13px}.back:hover{color:#fff}main{padding:64px 0 80px}.eyebrow{color:var(--gold);font-size:11px;font-weight:700;letter-spacing:.18em}.hero h1{margin:8px 0 10px;font-family:"Noto Serif JP",Georgia,serif;font-size:clamp(34px,6vw,58px);font-weight:500}.updated{color:var(--muted);font-size:12px}.lead{max-width:760px;margin:22px 0 34px;color:var(--muted)}.toc{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:32px}.toc a{padding:8px 12px;border:1px solid var(--line);border-radius:999px;color:var(--muted);font-size:11px;text-decoration:none}.content{padding:clamp(22px,5vw,48px);border:1px solid var(--line);border-radius:26px;background:rgba(16,24,35,.88);box-shadow:0 30px 90px rgba(0,0,0,.28)}section+section{margin-top:38px;padding-top:32px;border-top:1px solid var(--line)}h2{margin:0 0 12px;font-family:"Noto Serif JP",Georgia,serif;font-size:23px;font-weight:500}p,li{color:var(--muted);font-size:14px}ul{padding-left:1.3em}a{color:#f4d79f}footer{display:flex;justify-content:space-between;gap:20px;padding:26px 0 44px;border-top:1px solid var(--line);color:var(--muted);font-size:12px}.footer-links{display:flex;flex-wrap:wrap;gap:16px}.footer-links a{color:var(--muted);text-decoration:none}:focus-visible{outline:2px solid #f2d59d;outline-offset:4px}@media(max-width:620px){.shell{width:min(100% - 24px,920px)}.topbar{min-height:68px}.back{font-size:11px}main{padding:42px 0 60px}.content{border-radius:20px}footer{flex-direction:column}}