:root {
  --ink: #26343d;
  --muted: #6f7e86;
  --line: #dce7e9;
  --shell-green: #89a3a2;
  --aqua-soft: #eaf7f7;
}

* { box-sizing: border-box; }

html {
  min-width: 320px;
  background: #f7fbfc;
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans", "Noto Sans JP", sans-serif;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100svh;
  margin: 0;
  background:
    radial-gradient(circle at 10% 12%, rgba(148, 211, 216, .13) 0 11%, transparent 11.4%),
    linear-gradient(145deg, #fbfdfd 0%, #f3f9fa 100%);
}

a { color: #587f7e; text-underline-offset: 3px; }

.site-header {
  display: flex;
  width: min(980px, calc(100% - 48px));
  height: 84px;
  margin: 0 auto;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--ink);
  font-size: 24px;
  font-weight: 750;
  letter-spacing: -.7px;
  text-decoration: none;
}

.brand img {
  display: block;
  width: 42px;
  height: 42px;
  object-fit: contain;
}

.back-link {
  padding: 10px 14px;
  border-radius: 999px;
  color: var(--ink);
  font-size: 13px;
  font-weight: 650;
  text-decoration: none;
}

.back-link:hover { background: var(--aqua-soft); }

main {
  width: min(760px, calc(100% - 40px));
  margin: 34px auto 90px;
}

.page-title {
  margin: 0 0 10px;
  font-size: clamp(34px, 6vw, 52px);
  line-height: 1.2;
  letter-spacing: -.045em;
}

.updated {
  margin: 0 0 38px;
  color: var(--muted);
  font-size: 13px;
}

.intro {
  margin: 0 0 35px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.9;
}

.intro + .intro { margin-top: -22px; }

section {
  padding: 26px 0;
  border-top: 1px solid var(--line);
}

section h2 {
  margin: 0 0 13px;
  font-size: 19px;
  letter-spacing: -.02em;
}

section h3 {
  margin: 24px 0 9px;
  color: #405158;
  font-size: 15px;
  letter-spacing: -.01em;
}

section p,
section li {
  color: #5e6d74;
  font-size: 14px;
  line-height: 1.9;
}

section p { margin: 0; }
section p + p { margin-top: 12px; }
section ul,
section ol { margin: 0; padding-left: 1.4em; }
section li + li { margin-top: 5px; }
section p + ul,
section p + ol,
section ul + p,
section ol + p { margin-top: 12px; }
section li > ol,
section li > ul { margin-top: 7px; }

.table-scroll {
  margin: 18px 0;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, .72);
  -webkit-overflow-scrolling: touch;
}

table {
  width: 100%;
  min-width: 680px;
  border-collapse: collapse;
  color: #5e6d74;
  font-size: 13px;
  line-height: 1.65;
}

th,
td {
  padding: 13px 14px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th:last-child,
td:last-child { border-right: 0; }
tbody tr:last-child td { border-bottom: 0; }

th {
  background: rgba(234, 247, 247, .8);
  color: #405158;
  font-weight: 700;
  white-space: nowrap;
}

.contact-list {
  display: grid;
  gap: 10px;
  margin: 16px 0 0;
}

.contact-list div {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: 12px;
  padding: 13px 15px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(255, 255, 255, .68);
}

.contact-list dt,
.contact-list dd {
  margin: 0;
  color: #5e6d74;
  font-size: 14px;
  line-height: 1.7;
}

.contact-list dt {
  color: #405158;
  font-weight: 700;
}

.document-dates {
  margin-top: 36px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
  line-height: 1.8;
}

.document-dates p { margin: 0; }

.notice {
  margin-top: 34px;
  padding: 18px 20px;
  border: 1px solid rgba(137, 163, 162, .35);
  border-radius: 16px;
  background: rgba(255, 255, 255, .65);
  color: var(--muted);
  font-size: 12px;
  line-height: 1.75;
}

@media (max-width: 560px) {
  .site-header {
    width: calc(100% - 32px);
    height: 68px;
  }

  .brand { font-size: 21px; }
  .brand img { width: 36px; height: 36px; }
  .back-link { padding-right: 4px; }

  main {
    width: calc(100% - 32px);
    margin-top: 28px;
  }

  .page-title { font-size: 35px; }
  .intro { font-size: 14px; }
  section { padding: 23px 0; }
  section h2 { font-size: 18px; }

  .contact-list div {
    grid-template-columns: 1fr;
    gap: 3px;
  }
}