:root { --ink:#17313d; --ink-strong:#102733; --muted:#52656d; --paper:#f7f8f7; --white:#fff; --accent:#2a6470; --line:#d8e1e3; --max:860px; }
* { box-sizing:border-box; }
body { margin:0; color:var(--ink); background:var(--paper); font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif; font-size:17px; line-height:1.7; }
a { color:var(--accent); text-underline-offset:3px; }
.wrap { width:min(var(--max),calc(100% - 40px)); margin:0 auto; }
header { border-bottom:1px solid var(--line); background:var(--white); }
.nav { min-height:76px; display:flex; align-items:center; justify-content:space-between; gap:24px; }
.brand { color:var(--ink-strong); text-decoration:none; font-weight:780; }
.back { font-size:.94rem; font-weight:650; }
main { padding:64px 0 80px; }
article { padding:clamp(28px,6vw,58px); border:1px solid var(--line); border-radius:22px; background:var(--white); }
h1,h2 { color:var(--ink-strong); font-family:Georgia,"Times New Roman",serif; font-weight:500; line-height:1.16; }
h1 { margin:0 0 12px; font-size:clamp(2.35rem,6vw,4rem); }
h2 { margin:36px 0 10px; font-size:1.55rem; }
p { margin:0 0 18px; }
.effective { color:var(--muted); margin-bottom:32px; }
.notice { padding:18px 20px; border-left:3px solid var(--accent); background:#eaf1f2; }
footer { padding:30px 0 44px; color:var(--muted); font-size:.9rem; }
@media (max-width:600px) { .nav { align-items:flex-start; flex-direction:column; justify-content:center; padding:16px 0; gap:6px; } main { padding:34px 0 52px; } }