:root {
  color-scheme: light;
  --paper: #fffaf0;
  --ink: #292d30;
  --muted: #65635f;
  --accent: #b52c3a;
  --line: #dfdbd2;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  color: var(--ink);
  background: var(--paper);
}
* { box-sizing: border-box; }
body { margin: 0; font-size: 16px; line-height: 2; overflow-wrap: anywhere; }
a { color: inherit; text-underline-offset: .3em; }
a:hover { color: var(--accent); }
a:focus-visible { outline: 3px solid var(--accent); outline-offset: 5px; }
.skip-link { position: absolute; left: 1rem; top: -5rem; background: white; padding: .5rem 1rem; z-index: 2; }
.skip-link:focus { top: 1rem; }
.site-header, .site-footer { max-width: 1200px; margin: auto; padding: 24px 40px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { font-size: 23px; font-weight: 800; letter-spacing: .04em; text-decoration: none; }
.back-link { font-size: 13px; text-decoration: none; }
.back-link span { margin-left: 12px; color: var(--accent); }
.hero { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.hero-inner { max-width: 1040px; margin: auto; padding: 76px 40px 80px; }
.eyebrow { color: var(--accent); font-size: 12px; font-weight: 700; letter-spacing: .16em; display: flex; align-items: center; gap: 24px; margin: 0 0 24px; }
.eyebrow span { border: 1px solid currentColor; padding: 1px 12px; letter-spacing: .08em; }
h1 { font-size: clamp(15px, 2vw, 19px); font-weight: 600; margin: 0 0 18px; }
.hero-title { font-size: clamp(27px, 4.2vw, 43px); line-height: 1.65; letter-spacing: .035em; margin: 0 0 36px; }
.intro { max-width: 720px; }
p { margin: 0 0 1.25em; }
p:last-child { margin-bottom: 0; }
.page-layout { max-width: 1120px; margin: auto; padding: 0 40px; display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 72px; }
.contents { align-self: start; position: sticky; top: 32px; padding: 66px 0 40px; font-size: 13px; }
.contents p { color: var(--muted); font-size: 11px; letter-spacing: .06em; margin-bottom: 20px; }
.contents a { display: block; padding: 5px 0; text-decoration: none; }
.contents a:last-child { color: var(--accent); margin-top: 16px; }
.article section { padding: 64px 0; border-bottom: 1px solid var(--line); scroll-margin-top: 24px; }
.article section:last-child { border-bottom: 0; padding-bottom: 80px; }
.article h2 { font-size: 25px; letter-spacing: .04em; line-height: 1.6; margin: 0 0 28px; }
.article h2::before { content: ""; display: block; width: 28px; height: 3px; background: var(--accent); margin-bottom: 18px; }
.steps { padding: 0; margin: 0 0 30px; list-style: none; counter-reset: step; }
.steps li { position: relative; padding: 0 0 28px 52px; counter-increment: step; }
.steps li::before { content: "0" counter(step); position: absolute; left: 0; top: 0; font-size: 18px; color: var(--accent); font-weight: 700; }
.steps li:not(:last-child)::after { content: ""; position: absolute; left: 13px; top: 38px; bottom: 10px; width: 1px; background: var(--line); }
.steps li:last-child { padding-bottom: 0; }
.steps h3 { font-size: 18px; margin: 0 0 8px; }
.note { padding: 20px 24px; border-left: 3px solid var(--accent); background: #f3eee4; }
.details { margin: 0 0 30px; border-top: 1px solid var(--line); }
.details div { display: grid; grid-template-columns: 100px minmax(0, 1fr); gap: 20px; border-bottom: 1px solid var(--line); padding: 18px 0; }
.details dt { font-weight: 600; }
.details dd { margin: 0; }
.contact { background: #f0e9dd; padding: 72px 24px 80px; text-align: center; }
.contact-inner { max-width: 760px; margin: auto; }
.contact h2 { font-size: 24px; margin: 0 0 32px; }
.contact-lead { font-size: clamp(18px, 2.5vw, 23px); font-weight: 700; margin-top: 32px; }
.button { display: inline-flex; justify-content: center; align-items: center; gap: 30px; background: var(--accent); color: white; text-decoration: none; padding: 17px 30px; border-radius: 3px; font-weight: 700; margin-top: 28px; }
.button:hover { background: #942330; color: white; }
.site-footer { padding-top: 30px; padding-bottom: 30px; }
.site-footer a { font-weight: 700; text-decoration: none; }
.site-footer small { font-size: 12px; color: var(--muted); }
@media (max-width: 850px) {
  .page-layout { grid-template-columns: minmax(0, 1fr); gap: 0; max-width: 760px; }
  .contents { position: static; padding: 30px 0; border-bottom: 1px solid var(--line); display: flex; gap: 8px 22px; flex-wrap: wrap; }
  .contents p { width: 100%; margin-bottom: 4px; }
  .contents a:last-child { margin-top: 0; }
}
@media (max-width: 520px) {
  .site-header, .site-footer { padding: 18px 22px; }
  .hero-inner { padding: 48px 24px; }
  .desktop-break { display: none; }
  .hero-title { font-size: 29px; }
  .page-layout { padding: 0 24px; }
  .article section { padding: 44px 0; }
  .article h2 { font-size: 23px; }
  .details div { grid-template-columns: 1fr; gap: 4px; }
  .note { padding: 16px 18px; }
  .contact { padding: 48px 24px 56px; }
  .button { width: 100%; gap: 14px; padding: 16px; font-size: 15px; }
}
@media print {
  .contents, .back-link, .skip-link { display: none; }
  .page-layout { display: block; }
  .hero-inner, .article section, .contact { padding-top: 24px; padding-bottom: 24px; }
  .button { color: var(--accent); background: transparent; border: 1px solid; }
}