.size {
width: 100%;
height: 300px;
}
table.el-table {
margin: 0 !important;
border: none !important;
}
th[class*=el-table], td[class*=el-table] {
border-top: none !important;
border-left: none !important;
border-right: none !important;
background: #fff !important;
}