:root {
  --color-bg: #ffffff;
  --color-bg-soft: #f6f8fb;
  --color-text: #1f2937;
  --color-muted: #6b7280;
  --color-border: #e5e7eb;
  --color-primary: #2563eb;
  --color-primary-dark: #1d4ed8;
  --color-card: #ffffff;
  --shadow-card: 0 10px 24px rgba(15, 23, 42, 0.06);
  --radius-large: 18px;
  --radius-medium: 12px;
  --container-width: 960px;
}

* {
  box-sizing: border-box;
}

html {
  font-size: 16px;
}

body {
  margin: 0;
  font-family:
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  line-height: 1.8;
  color: var(--color-text);
  background: var(--color-bg);
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

.container {
  width: min(100% - 32px, var(--container-width));
  margin: 0 auto;
}

.site-header {
  border-bottom: 1px solid var(--color-border);
  background: rgba(255, 255, 255, 0.96);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px 0;
}

.site-logo {
  display: inline-flex;
  flex-direction: column;
  color: var(--color-text);
  text-decoration: none;
}

.site-logo:hover {
  text-decoration: none;
}

.site-logo-main {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.03em;
}

.site-logo-sub {
  margin-top: 2px;
  font-size: 0.78rem;
  color: var(--color-muted);
  letter-spacing: 0.08em;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 18px;
  font-size: 0.94rem;
}

.site-nav a {
  color: var(--color-text);
}

.site-nav a:hover {
  color: var(--color-primary);
}

.hero {
  padding: 72px 0 64px;
  background:
    radial-gradient(circle at top left, rgba(37, 99, 235, 0.10), transparent 32%),
    linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--color-primary);
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.35;
  color: var(--color-text);
}

h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  letter-spacing: 0.04em;
}

h2 {
  margin-bottom: 24px;
  font-size: clamp(1.45rem, 3vw, 2rem);
}

h3 {
  margin-bottom: 10px;
  font-size: 1.18rem;
}

.hero-text {
  max-width: 760px;
  margin: 24px 0 0;
  font-size: 1.08rem;
  color: #374151;
}

.section {
  padding: 56px 0;
}

.section-light {
  background: var(--color-bg-soft);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.card {
  padding: 26px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-large);
  background: var(--color-card);
  box-shadow: var(--shadow-card);
}

.card p {
  margin: 0;
  color: #4b5563;
}

.link-list {
  display: grid;
  gap: 14px;
  max-width: 520px;
}

.link-list a {
  display: block;
  padding: 16px 18px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);
  background: #ffffff;
  color: var(--color-text);
  font-weight: 600;
}

.link-list a:hover {
  border-color: rgba(37, 99, 235, 0.35);
  color: var(--color-primary);
  text-decoration: none;
}

.page-title {
  padding: 48px 0 36px;
  background: var(--color-bg-soft);
  border-bottom: 1px solid var(--color-border);
}

.page-title p {
  max-width: 720px;
  margin: 14px 0 0;
  color: #4b5563;
}

.content {
  padding: 48px 0 64px;
}

.content-body {
  max-width: 760px;
}

.content-body h2 {
  margin-top: 36px;
  margin-bottom: 14px;
  font-size: 1.35rem;
}

.content-body p {
  margin: 0 0 18px;
}

.content-body ul {
  margin: 0 0 24px;
  padding-left: 1.4em;
}

.content-body li {
  margin-bottom: 8px;
}

.notice-box {
  padding: 20px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);
  background: var(--color-bg-soft);
}

.breadcrumb {
  margin-bottom: 18px;
  font-size: 0.9rem;
  color: var(--color-muted);
}

.breadcrumb a {
  color: var(--color-muted);
}

.document-meta {
  margin-top: 32px;
  color: var(--color-muted);
  font-size: 0.92rem;
}

.site-footer {
  padding: 28px 0;
  border-top: 1px solid var(--color-border);
  background: #ffffff;
  color: var(--color-muted);
  font-size: 0.9rem;
}

.site-footer p {
  margin: 0;
}

@media (max-width: 720px) {
  .header-inner {
    align-items: flex-start;
    flex-direction: column;
    gap: 14px;
  }

  .site-nav {
    justify-content: flex-start;
    gap: 12px 16px;
  }

  .hero {
    padding: 56px 0 48px;
  }

  .section {
    padding: 44px 0;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }

  .card {
    padding: 22px;
  }
}