:root {
  --hover-color: #1147A4;
  --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  --primary-color: #0249b0;
  --secondary-color: #f0f5ff;
  --accent-color: #e6eeff;
  --text-color: #333;
  --light-text: #666;
  --border-radius: 5px;
  --transition: all 0.25s ease;
}

.shendin-item {
  display: flex;
  gap: 25px;
  flex-wrap: wrap;
  list-style: none;
  margin: 0;
}
.shendin-item li{
    width: calc((100% - 3 * 25px) / 4);
}
.shendin-item a {
  display: block;
  padding: 30px 24px;
  text-align: center;
  background-color: var(--secondary-color);
  border: 1px solid var(--primary-color);
  border-radius: var(--border-radius);
  color: var(--primary-color);
  text-decoration: none;
  font-size: 20px;
  font-weight: 700;
  transition: var(--transition);
  box-shadow: var(--shadow);
}

.shendin-item a:hover {
  background-color: var(--accent-color);
  color: var(--hover-color);
  border-color: rgba(17, 71, 164, 0.3);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
  transform: translateY(-2px);
}

.shendin-item a:active {
  transform: translateY(0);
  box-shadow: var(--shadow);
}
.shendin-cont .groups-box{
    display: none;
}
@media (max-width: 1399px) {
    .shendin-item li {
        width: calc((100% - 2 * 25px) / 3);
    }
}
@media (max-width: 768px) {
    .shendin-item li {
        width: calc((100% - 25px) / 2);
    }
}
@media (max-width: 576px) {
    .shendin-item li {
        width: 100%;
    }
}
.shendin-tab{
    display: flex;
    gap: 20px;
    border-bottom: 2px solid #0249B0;
    margin-bottom: 20px;
    flex-wrap: wrap;
}
.shendin-tab li{
    border: 2px solid #0249B0;
    border-bottom: none;
    border-radius: 5px 5px 0 0;
    cursor: pointer;
}
.shendin-tab li.active{
    background: #0249B0;
}
.shendin-tab li.active span{
    background: #0249B0;
    color: #fff;
}
.shendin-tab li span{
    font-size: 18px;
    display: inline-block;
    padding: 7px 20px;
    font-weight: 700;
    border-bottom: 2px solid #0249B0;
    transform: translateY(2px);
}