/* ===== jieshao.css - 业务介绍板块专用样式 ===== */

.jieshao {
  border: none;
  padding: 48px 5%;
  background: #fdfbf7;
}
.jieshao-title {
  text-align: center;
  color: #b8363a;
  font-size: 45px;
  margin-bottom: 10px;
  font-weight: bolder;
    font-family: Source Han Sans CN;
}
.jieshao-desc {
  text-align: center;
  color: #666;
  font-size: 18px;
  max-width: 600px;
  margin: 0 auto 10px;
  line-height: 1.8;
}
.jieshao-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
  max-width: 1200px;
  margin: 0 auto;
}
.jieshao-card {
  text-align: center;
  padding: 28px 12px;
  opacity: 0;
  transform: translateY(30px);
  animation: jieshaoPop 0.5s ease forwards;
}
.jieshao-card:nth-child(1) { animation-delay: 0.00s; }
.jieshao-card:nth-child(2) { animation-delay: 0.15s; }
.jieshao-card:nth-child(3) { animation-delay: 0.30s; }
.jieshao-card:nth-child(4) { animation-delay: 0.45s; }

.jieshao-label {
  font-size: 22px;
  color: #373B41;
  margin-bottom: 6px;
}
.jieshao-num {
  font-size: 45px;
  font-weight: bolder;
  color: #b8363a;
  line-height: 1;
}

@keyframes jieshaoPop {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
/* 折叠屏展开态：2列，避免4列挤在一起 */
@media (min-width: 600px) and (max-width: 1023px) {
  .jieshao {
    padding: 36px 5%;
  }
  .jieshao-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    max-width: 600px;
  }
  .jieshao-title {
    font-size: 38px;
  }
}
@media (max-width: 599px) {
  .jieshao {
    padding: 32px 12px;
  }
  .jieshao-title {
    font-size: 28px;
    margin-bottom: 8px;
  }
  .jieshao-desc {
    font-size: 16px;
    max-width: 90%;
    margin-bottom: 10px;
  }
  .jieshao-grid {
      width: 80%;
    grid-template-columns: repeat(2, 1fr);
    gap: 5px;
  }
  .jieshao-card {
    padding: 16px 8px;
  }
  .jieshao-label {
    font-size: 18px;
  }
  .jieshao-num {
    font-size: 35px;
  }
}