/* 折叠面板容器 */
.el-collapse {
}

/* 折叠面板项 */
.el-collapse-item {
  font-size: 28px;
  border-bottom: 1px solid #666666;
}

/* 面板标题 */
.el-collapse-item__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  line-height: 48px;
  padding: 25px;
  padding-left: 0;
  color: #303133;
  cursor: pointer;
  font-family: Alibaba-PuHuiTi-B;
  font-weight: bold;
  font-size: 30px;
  color: #555555;
  transition: border-bottom-color .3s;
  position: relative;
}

/* 箭头图标 */
.el-collapse-item__arrow {
  margin-left: auto;
  width: 20px;
  height: 20px;
  border-right: 2px solid #909399;
  border-bottom: 2px solid #909399;
  transform: rotate(45deg);
  transition: transform .3s;
}

/* 展开时箭头旋转 */
.el-collapse-item.is-active .el-collapse-item__arrow {
  transform: rotate(-135deg);
  border-color: #FF5B1A;
}

/* 内容包装器 */
.el-collapse-item__wrap {
  will-change: height;
  overflow: hidden;
  box-sizing: border-box;
  transition: height .3s ease-in-out;
  height: 0;
}

/* 内容区域 */
.el-collapse-item__content {
  padding: 15px 0;
  padding-top: 0;
  font-size: 28px;
  line-height: 35px;
}

/* 激活状态 */
.el-collapse-item.is-active .el-collapse-item__wrap {
  height: auto;
}