:root {
  --primary: #d4145a;
  --primary-dark: #8b0a3a;
  --secondary: #3d1e6d;
  --background: #f4f4f8;
  --surface: #ffffff;
  --text: #14121c;
  --text-secondary: #6e6a7a;
  --divider: #e4e2ea;
  --max-width: 720px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background: var(--background);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.65;
  font-size: 16px;
}

a {
  color: var(--primary);
}

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

.site-header {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  padding: 1.25rem 1.5rem;
}

.site-header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.brand {
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
  text-decoration: none;
  letter-spacing: -0.02em;
}

.lang-switch {
  display: flex;
  gap: 0.75rem;
  font-size: 0.875rem;
}

.lang-switch a {
  color: rgba(255, 255, 255, 0.88);
  text-decoration: none;
}

.lang-switch a.active,
.lang-switch a:hover {
  color: #fff;
  text-decoration: underline;
}

.page {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--divider);
  border-radius: 18px;
  padding: 2rem;
  box-shadow: 0 8px 24px rgba(20, 18, 28, 0.06);
}

h1 {
  margin: 0 0 0.5rem;
  font-size: clamp(1.75rem, 4vw, 2.125rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.meta {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  margin-bottom: 2rem;
}

h2 {
  margin: 2rem 0 0.75rem;
  font-size: 1.125rem;
}

p,
ul {
  margin: 0 0 1rem;
}

ul {
  padding-left: 1.25rem;
}

li {
  margin-bottom: 0.35rem;
}

.footer-nav {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--divider);
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.9375rem;
}

.notice {
  background: #fff8e6;
  border: 1px solid #f0d58c;
  border-radius: 12px;
  padding: 1rem 1.125rem;
  font-size: 0.9375rem;
  margin-bottom: 1.5rem;
}

@media (max-width: 640px) {
  .card {
    padding: 1.25rem;
    border-radius: 14px;
  }

  .page {
    padding-top: 1.25rem;
  }
}