.pdf-tabs {
  display: flex;
  flex-direction: row-reverse;
}
.pdf-tabs .box {
  box-sizing: border-box;
  position: relative;
  display: flex;
  align-items: center;
  width: 120px;
  height: 50px;
  border: 1px solid #ddd;
  border-radius: 5px;
  cursor: pointer;
}
.pdf-tabs .box span {
  flex: 1;
  display: block;
  padding: 0 15px;
  background: url(/_res/unist/me/img/content/pdf-tabs-arr.png) no-repeat center right 15px / 8px
    auto;
  font-size: 15px;
  font-weight: 600;
  line-height: 160%;
  letter-spacing: -0.02em;
  color: #333;
}
.pdf-tabs .box ul {
  position: absolute;
  top: calc(100% + 5px);
  right: -1px;
  display: none;
  width: 100%;
  padding-top: 5px;
  background-color: #fff;
  border: 1px solid #ddd;
  border-radius: 5px;
}
.pdf-tabs .box ul li a {
  display: block;
  padding: 0 15px 5px;
  font-size: 14px;
  font-weight: 600;
  line-height: 160%;
  letter-spacing: -0.02em;
  color: #333;
}