:root {
  --bg: #f5f7fb;
  --surface: #ffffff;
  --text: #1e2430;
  --muted: #616b7c;
  --line: #d7dfea;
  --accent: #145be1;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Hiragino Sans", "Yu Gothic", "Meiryo", sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, #f9fbff 0%, var(--bg) 100%);
}

.container {
  width: min(920px, 92%);
  margin: 0 auto;
  padding: 56px 0 80px;
}

.hero h1 {
  margin: 6px 0 12px;
  font-size: clamp(1.9rem, 4vw, 2.8rem);
}

.eyebrow {
  margin: 0;
  color: var(--accent);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.82rem;
}

.lead {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

section {
  margin-top: 40px;
}

section h2 {
  margin: 0 0 12px;
  font-size: 1.15rem;
}

.card-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.card {
  display: block;
  text-decoration: none;
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 12px;
  padding: 16px;
  color: inherit;
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}

.card:hover,
.card:focus-visible {
  transform: translateY(-2px);
  border-color: #aec8ff;
  box-shadow: 0 8px 24px rgba(26, 56, 124, 0.12);
  outline: none;
}

.card-title {
  display: block;
  font-weight: 700;
}

.card-meta {
  display: inline-block;
  margin-bottom: 6px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.card-desc {
  display: block;
  margin-top: 4px;
  color: var(--muted);
}