:root {
  --bg: #f6f7f9;
  --card: #ffffff;
  --text: #202124;
  --muted: #6b7280;
  --line: #e5e7eb;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --shadow: 0 20px 60px rgba(15, 23, 42, 0.10);
  --radius: 24px;
}

* {
  box-sizing: border-box;
}

html {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--bg);
}

body {
  margin: 0;
}

.page {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: 56px 0 72px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr);
  gap: 40px;
  align-items: center;
  min-height: 520px;
}

.eyebrow {
  color: var(--primary);
  font-weight: 700;
  letter-spacing: 0.08em;
  font-size: 14px;
}

h1 {
  font-size: clamp(44px, 7vw, 76px);
  line-height: 1;
  margin: 12px 0 20px;
  letter-spacing: -0.06em;
}

.subtitle {
  font-size: clamp(22px, 3vw, 32px);
  line-height: 1.35;
  margin: 0 0 18px;
  font-weight: 700;
}

.description,
.section-text,
.card p,
details p,
.meta {
  color: var(--muted);
  line-height: 1.8;
}

.description {
  max-width: 680px;
  font-size: 16px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 30px 0 14px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 46px;
  padding: 0 22px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 700;
  transition: transform 0.16s ease, box-shadow 0.16s ease, background 0.16s ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button--primary {
  background: var(--primary);
  color: white;
  box-shadow: 0 10px 24px rgba(37, 99, 235, 0.24);
}

.button--primary:hover {
  background: var(--primary-dark);
}

.button--secondary {
  background: white;
  color: var(--text);
  border: 1px solid var(--line);
}

.hero__card {
  min-height: 340px;
  border-radius: 36px;
  background:
    radial-gradient(circle at 20% 20%, rgba(37, 99, 235, 0.14), transparent 32%),
    linear-gradient(135deg, #ffffff, #eef2ff);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 28px;
}

.mock-notification {
  width: min(420px, 100%);
  min-height: 96px;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(255, 255, 255, 0.85);
  box-shadow: 0 18px 48px rgba(15, 23, 42, 0.16);
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 20px;
}

.mock-icon {
  width: 52px;
  height: 52px;
  border-radius: 16px;
  background: #2563eb;
  color: white;
  display: grid;
  place-items: center;
  font-weight: 800;
  font-size: 20px;
}

.mock-title {
  font-weight: 800;
  margin-bottom: 6px;
}

.mock-text {
  color: var(--muted);
}

.section {
  margin-top: 28px;
  padding: 32px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.04);
}

.section h2 {
  margin: 0 0 20px;
  font-size: 26px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.card {
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 20px;
  background: #fbfdff;
}

.card h3 {
  margin: 0 0 10px;
}

details {
  border-top: 1px solid var(--line);
  padding: 16px 0;
}

details:first-of-type {
  border-top: 0;
}

summary {
  cursor: pointer;
  font-weight: 700;
}

.notice-list p {
  color: var(--muted);
  line-height: 1.8;
  margin: 0 0 12px;
}

.notice-list p:last-child {
  margin-bottom: 0;
}

.mock-note {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
  text-align: center;
}

.download-note {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}

.section-text a {
  color: var(--primary);
  font-weight: 700;
  text-decoration: none;
}

.section-text a:hover {
  text-decoration: underline;
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: var(--muted);
  padding: 28px 4px 0;
  font-size: 14px;
}

@media (max-width: 860px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
  }

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

  .page {
    width: min(100% - 28px, 1120px);
    padding-top: 32px;
  }

  .section {
    padding: 24px;
  }

  .footer {
    flex-direction: column;
  }
}