:root {
  --bg: #eef4ff;
  --bg-strong: #ffffff;
  --bg-soft: rgba(255, 255, 255, 0.78);
  --text: #122033;
  --text-secondary: #46556b;
  --line: rgba(18, 32, 51, 0.12);
  --accent: #2154d6;
  --accent-soft: rgba(33, 84, 214, 0.1);
  --shadow: 0 20px 60px rgba(25, 48, 92, 0.12);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --max-width: 1180px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Inter", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(33, 84, 214, 0.18), transparent 34%),
    linear-gradient(180deg, #f7faff 0%, #edf3ff 45%, #f8fbff 100%);
  line-height: 1.7;
}

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

.page-shell {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 28px 20px 72px;
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 28px;
  border: 1px solid rgba(255, 255, 255, 0.65);
  border-radius: 36px;
  background:
    linear-gradient(135deg, rgba(19, 48, 116, 0.9), rgba(33, 84, 214, 0.82)),
    linear-gradient(180deg, rgba(255, 255, 255, 0.16), rgba(255, 255, 255, 0.04));
  box-shadow: var(--shadow);
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto -120px -180px auto;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
  filter: blur(4px);
}

.topbar,
.hero-copy {
  position: relative;
  z-index: 1;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand,
.back-link {
  text-decoration: none;
  color: #fff;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.brand-logo {
  width: 36px;
  height: 36px;
  border-radius: 12px;
}

.back-link {
  padding: 10px 16px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.14);
  font-size: 14px;
  font-weight: 600;
}

.hero-copy {
  max-width: 760px;
  margin-top: 56px;
  color: #fff;
}

.eyebrow {
  margin: 0 0 16px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.72);
}

.hero h1 {
  margin: 0;
  font-size: clamp(2.4rem, 5vw, 4.5rem);
  line-height: 1.05;
  letter-spacing: -0.04em;
}

.lead {
  margin: 24px 0 0;
  max-width: 680px;
  font-size: 18px;
  color: rgba(255, 255, 255, 0.88);
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.hero-meta span {
  padding: 8px 14px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.1);
  font-size: 14px;
}

.content-grid {
  display: grid;
  grid-template-columns: minmax(220px, 260px) 1fr;
  gap: 24px;
  align-items: start;
  margin-top: 28px;
}

.toc-card,
.article-card {
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: var(--radius-xl);
  background: var(--bg-soft);
  backdrop-filter: blur(20px);
  box-shadow: 0 18px 50px rgba(34, 64, 118, 0.1);
}

.toc-card {
  position: sticky;
  top: 18px;
  padding: 22px 18px;
}

.toc-title {
  margin: 0 0 12px;
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.toc-card a {
  display: block;
  padding: 10px 12px;
  border-radius: 12px;
  color: var(--text);
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
}

.toc-card a:hover {
  background: rgba(255, 255, 255, 0.72);
}

.article-card {
  padding: 34px;
}

.policy-section + .policy-section {
  margin-top: 34px;
  padding-top: 34px;
  border-top: 1px solid var(--line);
}

.policy-section h2 {
  margin: 0 0 14px;
  font-size: 28px;
  line-height: 1.2;
  letter-spacing: -0.03em;
}

.policy-section h3 {
  margin: 0 0 10px;
  font-size: 18px;
  line-height: 1.35;
}

.policy-section p,
.policy-section li {
  color: var(--text-secondary);
  font-size: 16px;
}

.policy-section ul {
  margin: 12px 0 0;
  padding-left: 20px;
}

.info-block + .info-block {
  margin-top: 24px;
}

.highlight-card {
  margin-bottom: 18px;
  padding: 22px;
  border-radius: var(--radius-lg);
  background:
    linear-gradient(135deg, rgba(33, 84, 214, 0.12), rgba(19, 48, 116, 0.04)),
    #fff;
  border: 1px solid rgba(33, 84, 214, 0.12);
}

.highlight-card p {
  margin: 0;
  color: var(--text);
  font-weight: 600;
}

.english-note {
  padding: 24px;
  border-radius: var(--radius-lg);
  background: rgba(33, 84, 214, 0.06);
}

@media (max-width: 960px) {
  .content-grid {
    grid-template-columns: 1fr;
  }

  .toc-card {
    position: static;
  }
}

@media (max-width: 680px) {
  .page-shell {
    padding: 14px 14px 48px;
  }

  .hero {
    padding: 22px;
    border-radius: 28px;
  }

  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero-copy {
    margin-top: 34px;
  }

  .lead {
    font-size: 16px;
  }

  .article-card {
    padding: 24px 20px;
  }

  .policy-section h2 {
    font-size: 24px;
  }
}