:root {
  --color-bg: #ffffff; --color-surface: #f5f7fa; --color-text: #1b1f24;
  --color-muted: #5b6470; --color-line: #e2e6eb; --color-accent: #1f3a5f;
  --font-sans: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "Hiragino Sans",
    "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic", Meiryo, sans-serif;
  --measure: 760px; --gutter: 24px; --space-section: 72px; --radius: 10px;
}
@media (max-width: 600px) { :root { --gutter: 16px; --space-section: 56px; } }

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body { margin: 0; background: var(--color-bg); color: var(--color-text);
  font-family: var(--font-sans); font-size: 1rem; line-height: 1.85; font-feature-settings: "palt"; }
a { color: var(--color-accent); text-decoration-thickness: 1px; text-underline-offset: 0.2em; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 3px; }
h1, h2, h3 { margin: 0; line-height: 1.4; font-weight: 600; letter-spacing: 0.01em; }
p { margin: 0 0 1em; }
ul, ol { margin: 0; padding: 0; list-style: none; }

.skip { position: absolute; left: -999px; top: 8px; z-index: 10; padding: 8px 12px;
  background: var(--color-accent); color: #fff; border-radius: 6px; }
.skip:focus { left: 8px; }
.container { max-width: var(--measure); margin: 0 auto; padding: 0 var(--gutter); }

.site-header { border-bottom: 1px solid var(--color-line); }
.site-header .container { display: flex; align-items: center; justify-content: space-between;
  gap: 16px; min-height: 64px; flex-wrap: wrap; }
.brand { font-weight: 700; font-size: 1.25rem; letter-spacing: 0.02em; color: var(--color-text); text-decoration: none; }
.site-nav ul { display: flex; gap: 20px; flex-wrap: wrap; }
.site-nav a { font-size: 0.9375rem; color: var(--color-muted); text-decoration: none; }
.site-nav a:hover { color: var(--color-accent); text-decoration: underline; }

.hero { padding: calc(var(--space-section) + 8px) 0 32px; border-bottom: 1px solid var(--color-line); }
.hero h1 { font-size: clamp(1.75rem, 4.5vw, 2.5rem); margin-bottom: 20px; }
.hero .lead { font-size: 1.0625rem; color: var(--color-muted); max-width: 40em; }

.section { padding-top: var(--space-section); scroll-margin-top: 16px; }
.section h2 { display: inline-block; font-size: 1.375rem; margin-bottom: 24px; padding-bottom: 12px;
  border-bottom: 2px solid var(--color-accent); }
.section h3 { font-size: 1.0625rem; margin-bottom: 8px; }

.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.card { background: var(--color-surface); border-radius: var(--radius); padding: 20px; }
.card p { margin: 0; font-size: 0.9375rem; }

.checklist li { position: relative; padding-left: 20px; margin-bottom: 8px; }
.checklist li::before { content: ""; position: absolute; left: 0; top: 0.72em; width: 8px; height: 8px;
  border-radius: 50%; background: var(--color-accent); }

.split { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.panel { border: 1px solid var(--color-line); border-radius: var(--radius); padding: 20px; }
.panel li { font-size: 0.9375rem; }

.tiles { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.tiles li { background: var(--color-surface); border-radius: var(--radius); padding: 16px 20px; font-size: 0.9375rem; }

.steps { counter-reset: step; }
.steps li { counter-increment: step; position: relative; padding: 0 0 20px 44px; }
.steps li::before { content: counter(step); position: absolute; left: 0; top: 0; width: 28px; height: 28px;
  border-radius: 50%; background: var(--color-accent); color: #fff; font-size: 0.875rem; font-weight: 600;
  display: flex; align-items: center; justify-content: center; }
.steps li:not(:last-child)::after { content: ""; position: absolute; left: 13.5px; top: 32px; bottom: 4px;
  width: 1px; background: var(--color-line); }
.steps li:last-child { padding-bottom: 0; }

.mv { display: grid; grid-template-columns: 7em 1fr; gap: 12px 16px; margin: 0; }
.mv dt { color: var(--color-accent); font-weight: 700; letter-spacing: 0.04em; }
.mv dd { margin: 0; }

.company-table { display: grid; grid-template-columns: 9em 1fr; margin: 0; border-top: 1px solid var(--color-line); }
.company-table dt, .company-table dd { margin: 0; padding: 14px 0; border-bottom: 1px solid var(--color-line); }
.company-table dt { color: var(--color-muted); font-weight: 500; }

.contact-band { margin-top: var(--space-section); padding: 48px 0; background: var(--color-surface); }
.contact-email { font-size: 1.125rem; word-break: break-all; margin: 0; }

@media (max-width: 720px) {
  .cards, .split { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .tiles, .mv { grid-template-columns: 1fr; }
  .mv dd { margin-bottom: 8px; }
  .company-table { grid-template-columns: 1fr; }
  .company-table dt { padding-bottom: 0; border-bottom: 0; font-size: 0.875rem; }
}

.site-footer { padding: 32px 0 40px; border-top: 1px solid var(--color-line); font-size: 0.875rem; color: var(--color-muted); }
.site-footer .container { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.site-footer a { color: var(--color-muted); }
.site-footer p { margin: 0; }
.page + .site-footer, main.page ~ .site-footer { margin-top: calc(var(--space-section) + 16px); }

.page { padding-top: var(--space-section); }
.page h1 { font-size: 1.75rem; margin-bottom: 24px; }
.page h2 { font-size: 1.125rem; margin: 32px 0 8px; }
.page ul { padding-left: 1.4em; list-style: disc; }
.page .meta { color: var(--color-muted); font-size: 0.9375rem; margin-top: 32px; }