:root {
  color-scheme: light;
  --ink: #1e302d;
  --muted: #667773;
  --green: #173c36;
  --logo-blue: #003366;
  --gold: #b18c52;
  --paper: #f7f7f3;
  --line: #dfe5df;
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
}

* { box-sizing: border-box; }
body { margin: 0; background: var(--paper); color: var(--ink); line-height: 1.9; }
a { color: inherit; }
.topline { height: 5px; background: var(--logo-blue); }
header { border-bottom: 1px solid var(--line); background: #fff; }
.header-inner, main, footer { width: min(100% - 40px, 1040px); margin-inline: auto; }
.header-inner { min-height: 88px; display: flex; align-items: center; gap: 15px; }
.brand-logo { display: block; width: min(190px, 100%); height: auto; }
main { padding-block: clamp(48px, 8vw, 88px) 80px; }
.notice { max-width: 760px; margin: 0 auto; background: #fff; border: 1px solid var(--line); border-radius: 3px; box-shadow: 0 12px 35px #233b3210; overflow: hidden; }
.notice-top { padding: 36px clamp(24px, 7vw, 68px) 0; }
.eyebrow { display: flex; align-items: center; gap: 12px; margin: 0 0 20px; color: var(--gold); font-size: 11px; font-weight: 700; letter-spacing: .2em; }
.eyebrow::before { content: ""; width: 27px; height: 1px; background: currentColor; }
h1 { margin: 0; color: var(--green); font-size: clamp(22px, 3vw, 28px); font-weight: 600; letter-spacing: .02em; line-height: 1.5; white-space: nowrap; }
.rule { height: 1px; margin: 30px 0 0; background: linear-gradient(90deg, var(--gold) 0 52px, var(--line) 52px 100%); }
.notice-body { padding: 24px clamp(24px, 7vw, 68px) 42px; }
.notice-body p { margin: 0 0 18px; font-size: 15px; line-height: 2.15; }
.notice-body p:last-of-type { margin-bottom: 0; }
.signature { margin-top: 30px; color: var(--green); font-size: 15px; font-weight: 700; text-align: right; letter-spacing: .04em; }
.contact { margin-top: 26px; padding: 30px clamp(24px, 7vw, 68px) 34px; background: #f7f8f5; border-top: 1px solid var(--line); }
.contact h2 { margin: 0 0 18px; color: var(--green); font-size: 14px; letter-spacing: .13em; }
.contact dl { margin: 0; font-size: 13px; line-height: 1.8; }
.contact dt { margin-top: 12px; color: var(--green); font-weight: 600; }
.contact dt:first-child { margin-top: 0; }
.contact dd { margin: 0; }
.contact a { text-decoration-color: #aab7af; text-underline-offset: 3px; }
.contact a:hover { color: #8b6938; }
footer { padding: 0 0 28px; color: var(--muted); text-align: center; font-size: 11px; letter-spacing: .06em; }

@media (max-width: 520px) {
  .header-inner, main, footer { width: min(100% - 28px, 1040px); }
  .header-inner { min-height: 74px; }
  main { padding-block: 32px 52px; }
  .notice { border-radius: 2px; }
  .notice-top { padding-top: 28px; }
  .notice-body p { font-size: 14px; }
  h1 { white-space: normal; font-size: clamp(21px, 5.5vw, 26px); }
  .contact dl { font-size: 12px; }
}