css实现多边形和梯形盒阴影技巧步骤

    <div class="m-tab-page-box cf">
      <div class="m-tab-page">
        <a class="m-page-item" href="">Set Physical Presence </a>
        <a class="m-page-item current" href="">Set Prodcut Tax Code </a>
      </div>
      <div class="m-tab-page-cover"></div>
    </div>

    <div class="tab-search-block">
      <div style="height: 160px;"></div>
    </div>

.m-tab-page-box{
  position: relative;
}
.m-tab-page-cover{
  width: 100%;
  height: 3px;
  background: #fff;
  position: absolute;
  bottom: -3px;
}
.m-tab-page {
  float: left;
  border-bottom: none;
  margin-bottom: 0;
  display: inline-block;
  box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
  height: 38px;

  .m-page-item {
    display: block;
    padding: 10px 20px;
    float: left;
    color: #222;
    font-weight: bold;
    margin-bottom: 0;
    background: #edf0f2;

    &.current {
      background: #fff;
      border: none;

    }
  }

}

.tab-search-block{
  background: #fff;
  box-shadow: 0 1px 3px 0px rgba(0, 0, 0, 0.1);
  margin-bottom: 20px;

}