:root {
  --primary: #3E8FB3;
  --accent: #2D5EA3;
  --text-primary: #0b2746;
  --text-white: #fff;
}

/* セクション背景 */
.index-contact {
  position: relative;
  background: #F6FAFF;
  overflow: hidden;
}
.index-contact::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, rgba(122, 200, 240, 0.1) 0%, transparent 70%);
}

/* コンテナ */
.index-contact__container {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 24px;
  text-align: center;
  position: relative;
  z-index: 1;
}

/* 見出し */
.index-contact__section-title {
  background: linear-gradient(90deg, #7AC8F0 0%, #007BC7 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-size: 23px;
  font-weight: 700;
  margin: 0 auto 60px;
  width: fit-content;
}

/* カード部分 */
.index-contact__content {
  max-width: 800px;
  margin: 0 auto;
  padding: 60px;
}

/* 説明テキスト */
.index-contact__description {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-primary);
  line-height: 1.8;
  margin: 0 0 40px;
  text-align: center;
}

/* ボタン */
.index-contact__button {
  display: inline-block;
  background: #2D5EA3;
  color: var(--text-white);
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 15px;
  font-weight: 700;
  padding: 16px 100px;
  border-radius: 50px;
  text-decoration: none;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

/* ホバーアニメーション */
.index-contact__button::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s ease;
}
.index-contact__button:hover::before {
  left: 100%;
}
.index-contact__button:hover {
  transform: translateY(-3px);
  box-shadow: 0 15px 30px rgba(45, 94, 163, 0.4);
}

/* レスポンシブ */
@media (max-width: 768px) {
  .index-contact { padding: 72px 0; }
  .index-contact__content { padding: 40px 24px; }
  .index-contact__button { padding: 16px 32px; }
}