.series-section {
  background-color: var(--color-bg-alt);
  padding: 80px 0;
}

.series-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 700;
  text-align: center;
}

.section-lead {
  text-align: center;
  margin-bottom: 3rem;
  line-height: 1.75;
}

/* ===== Grid ===== */
.series-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

/* ===== 2段目中央寄せ ===== */
.series-row-center {
  grid-column: 1 / -1;
  display: flex;
  justify-content: center;
  gap: 2rem;
}

.series-row-center .series-card {
  width: calc((100% - 2rem) / 3);
}

/* ===== Card ===== */
.series-card {
  background: #fff;
  border-radius: 1rem;
  padding: 2rem;
  box-shadow: 0 4px 20px rgba(0,0,0,0.05);
  display: flex;
  flex-direction: column;
}

.series-head {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.series-icon {
  width: 50px;
  height: 50px;
}

.series-desc {
  margin-bottom: 1.5rem;
}

.series-img {
  width: 100%;
  border-radius: 0.5rem;
}

/* ===== Tablet ===== */
@media (max-width: 1024px) {
  .series-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .series-row-center {
    grid-column: auto;
    display: contents;
  }

  .series-row-center .series-card {
    width: auto;
  }
}

/* ===== Mobile ===== */
@media (max-width: 768px) {
  .series-grid {
    grid-template-columns: 1fr;
  }
}