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

body {
  font-family: "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
  line-height: 1.8;
  color: #333333;
  background-color: #f9f9f9;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 20px;
}

.site-header {
  background-color: #ffffff;
  border-bottom: 1px solid #e5e7eb;
  padding: 12px 0;
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.header-logo-group {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.site-logo {
  height: 36px;
  width: auto;
  display: block;
}

.site-title-text {
  font-size: 1.15rem;
  font-weight: 700;
  color: #1e293b;
  line-height: 1;
}

.header-btn {
  background-color: #2563eb;
  color: #ffffff;
  padding: 8px 18px;
  text-decoration: none;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.875rem;
  transition: background-color 0.2s ease;
}

.header-btn:hover {
  background-color: #1d4ed8;
}

.policy-card {
  background-color: #ffffff;
  margin: 30px 0;
  padding: 40px;
  border-radius: 4px;
  border: 1px solid #e0e0e0;
}

.policy-title {
  font-size: 2rem;
  line-height: 1.3;
  margin-bottom: 25px;
  color: #111111;
  border-bottom: 2px solid #2563eb;
  padding-bottom: 10px;
}

.policy-card p {
  margin-bottom: 1.5em;
  font-size: 1rem;
}

.policy-card h2 {
  font-size: 1.3rem;
  margin: 1.8em 0 0.8em 0;
  color: #1e293b;
}

.policy-card ul {
  margin-bottom: 1.5em;
  padding-left: 20px;
}

.policy-card li {
  margin-bottom: 0.5em;
}

.site-footer {
  text-align: center;
  padding: 30px 0;
  font-size: 0.85rem;
  color: #777777;
}

@media (max-width: 600px) {
  .policy-card {
    padding: 20px;
  }
  .policy-title {
    font-size: 1.5rem;
  }
}