console 命令行工具 X clear

console

<div>
    <div class="son"></div>
</div>

div {
    width: 100px;
    height: 100px;
    border: 1px solid pink;
}
div.son {
    position: relative;
    right: 0;
    top: 0;
        width: 40px;
    height: 40px;
    border: 1px solid rgba(212, 8, 42, 0.815);
}