*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --color-bg: #ffffff;
  --color-text: #1a1a1a;
  --color-text-secondary: #555555;
  --color-border: #e0e0e0;
  --color-accent: #5b21b6;
  --color-section-bg: #f9fafb;
  --max-width: 720px;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Noto Sans JP", "Yu Gothic", sans-serif;
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.85;
  padding: 0 20px;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 48px 0 80px;
}

header {
  text-align: center;
  margin-bottom: 48px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--color-border);
}

header h1 {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  margin-bottom: 8px;
}

header .service-name {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

h2 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-top: 40px;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-accent);
  color: var(--color-text);
}

h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-top: 24px;
  margin-bottom: 12px;
  color: var(--color-text);
}

p {
  margin-bottom: 12px;
}

ul,
ol {
  margin-bottom: 12px;
  padding-left: 1.5em;
}

li {
  margin-bottom: 6px;
}

li strong {
  color: var(--color-text);
}

.third-party-item {
  background-color: var(--color-section-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 16px 20px;
  margin-bottom: 12px;
}

.third-party-item h4 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.third-party-item ul {
  margin-bottom: 0;
}

.third-party-item a {
  color: var(--color-accent);
  text-decoration: none;
  word-break: break-all;
}

.third-party-item a:hover {
  text-decoration: underline;
}

.note {
  font-size: 0.88rem;
  color: var(--color-text-secondary);
  margin-top: 16px;
  line-height: 1.7;
}

.contact-info {
  background-color: var(--color-section-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 20px 24px;
  margin-top: 16px;
}

.contact-info dl {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px 16px;
}

.contact-info dt {
  font-weight: 700;
  white-space: nowrap;
}

.contact-info dd {
  margin: 0;
}

.contact-info a {
  color: var(--color-accent);
  text-decoration: none;
}

.contact-info a:hover {
  text-decoration: underline;
}

footer {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
}

footer .date {
  margin-bottom: 4px;
}

.page-links {
  list-style: none;
  padding-left: 0;
}

.page-links li {
  margin-bottom: 12px;
}

.page-links a {
  display: block;
  padding: 16px 20px;
  background-color: var(--color-section-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  color: var(--color-text);
  text-decoration: none;
  font-weight: 700;
  transition: border-color 0.15s;
}

.page-links a:hover {
  border-color: var(--color-accent);
}

@media (max-width: 600px) {
  html {
    font-size: 15px;
  }

  .container {
    padding: 32px 0 60px;
  }

  header {
    margin-bottom: 32px;
  }

  h2 {
    margin-top: 32px;
  }

  .contact-info dl {
    grid-template-columns: 1fr;
  }

  .contact-info dt {
    margin-top: 8px;
  }
}