:root {
  --accent: #1f6a4d;
  --accent-deep: #123f2e;
  --accent-soft: #e7f1e8;
  --surface: #ffffff;
  --surface-soft: #f3f6f2;
  --text: #1c231d;
  --muted: #5b6a58;
  --line: #d9e2d5;
  --shadow: 0 16px 40px rgba(16, 32, 22, .12);
}

* { box-sizing: border-box; }
html { color-scheme: light; }
body {
  margin: 0;
  background: #f5f7f3;
  color: var(--text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", sans-serif;
  line-height: 1.8;
}
a { color: var(--accent); }
a:hover { color: var(--accent-deep); }
:focus-visible { outline: 3px solid rgba(31, 106, 77, .38); outline-offset: 3px; }

.guide-site-header {
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 10px max(16px, calc((100vw - 980px) / 2));
  background: var(--surface);
  border-bottom: 1px solid var(--line);
}
.guide-brand { color: var(--accent-deep); font-weight: 800; text-decoration: none; }
.guide-header-link,
.guide-cta {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 9px 16px;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  text-decoration: none;
  box-shadow: 0 2px 8px rgba(18, 63, 46, .22);
}
.guide-header-link:hover,
.guide-cta:hover { background: var(--accent-deep); color: #fff; }
.guide-main { width: min(760px, calc(100% - 24px)); margin: 0 auto; padding: 20px 0 64px; }
.breadcrumb ol { display: flex; flex-wrap: wrap; gap: 6px; margin: 0 0 14px; padding: 0; list-style: none; font-size: .9rem; color: var(--muted); }
.breadcrumb li:not(:last-child)::after { content: ">"; margin-left: 6px; }
.operation-disclosure { margin: 0 0 14px; padding: 8px 12px; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); color: var(--muted); font-size: .82rem; text-align: center; }
.guide-document { padding: clamp(20px, 5vw, 42px); border: 1px solid var(--line); border-radius: 24px; background: var(--surface); box-shadow: var(--shadow); }
.guide-title { padding-bottom: 26px; border-bottom: 1px solid var(--line); }
.eyebrow { margin: 0; color: var(--accent); font-weight: 700; }
h1 { margin: 6px 0 12px; color: var(--accent-deep); font-size: clamp(1.75rem, 6vw, 2.5rem); line-height: 1.3; }
h2 { margin: 38px 0 10px; color: var(--accent-deep); font-size: 1.45rem; line-height: 1.45; }
h3 { margin: 20px 0 6px; font-size: 1.05rem; }
p, li { overflow-wrap: anywhere; }
ul, ol { padding-left: 1.4em; }
.guide-caution { margin-top: 34px; padding: 2px 18px 18px; border-left: 4px solid var(--accent); border-radius: 0 14px 14px 0; background: var(--accent-soft); }
.faq-list > section { padding: 2px 16px 10px; border: 1px solid var(--line); border-radius: 14px; background: var(--surface-soft); }
.faq-list > section + section { margin-top: 12px; }
.guide-document-footer { margin-top: 42px; padding-top: 26px; border-top: 1px solid var(--line); text-align: center; }

@media (max-width: 560px) {
  .guide-site-header { align-items: stretch; flex-direction: column; }
  .guide-brand { min-height: 44px; display: flex; align-items: center; }
  .guide-header-link, .guide-cta { width: 100%; }
  .guide-document { padding: 20px 16px; border-radius: 18px; }
}