/* 课程导航标签样式 */
.block4 .tabs {
  margin-bottom: 45px;
  margin-top: 25px;
  position: sticky;
  /* background: #000; */
  top: 50px;
  padding: 15px 0;
  z-index: 2;
  clear: both;
  /* 突破.wp容器限制，实现通屏展示 */
  width: 99.4vw;
  margin-left: calc(50% - 50vw);
  left: 0;
}

.block4 .tabs.is-stuck {
  background: #000;
  box-shadow: 0 4px 4px 0 rgba(255, 237, 201, 0.20);
}

.block4 .tabs ul.flex-w {
  /* 导航选项卡在通屏容器内居中对齐 */
  justify-content: center;
}

.block4 .tabs li {
  width: 172px;
  height: 60px;
  display: flex;

  align-items: center;
  cursor: pointer;
  justify-content: center;
  background-repeat: no-repeat;
  background-size: 100% 100%;
  background-image: url("../img/bg_tab1.png");
  margin:7px 15px;
  a{
      color: #F0D197;
  }
}

.block4 .tabs li.active {
  height: 66px;
  background-image: url("../img/bg_tab2.png");
  a{
      color: #45330F;
      font-weight: bold;
      font-size: 20px;
  }
}

.block4 .tabs li:last-child {
  margin-right: 0;
}