基本css拼圖形

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<em class="close"></em>

.close {
        width: 16px;
        height: 16px;
        text-align: center;
        display: block;
        color: #28c54d;
        /*background-color: #DEF6E4;
        // background-color: #ffffff;
        // border: solid 2px #caf0d3; /*!no*/
        border: solid 2px #fff; /*!no*/
        font-style: normal;
        font-size: 20px; /*!px*/
        line-height: 80px;
        position: absolute;
        bottom: 2px;
        right: 0px;
        z-index: 1000;
        /*// margin: auto auto 50px auto;*/
        border-radius: 50%;
        background: #b0b0b0;
    }
    
    .close:before {
        content: "";
        position: absolute;
        width: 4px;
        /* height: 1px; */
        display: block;
        background-color: #fff;
        transform: rotate(45deg);
        top: 5px;
        left: 3px;
        border: solid thin #fff;
        border-radius: 1px;
    }
    .close:after {
        content: "";
        position: absolute;
        width: 4px;
        /* height: 1px; */
        display: block;
        background-color: #fff;
        transform: rotate(-45deg);
        top: 5px;
        left: 3px;
        border: solid thin #fff;
        border-radius: 1px;
    }