.box {
    width: 430px;
    height: 240px; 
    border: 1px solid #57bc54;
    background-color: #fff;
    position: fixed;
    left: 50%;
    top: 50%;
    margin-left: -215px;
    margin-top: -105px;
    border-radius: 7px;
    font-size: 16px;
    z-index:99;
}

.box .close {
    position: absolute;
    line-height: 20px;
    font-size: 30px;
    right: 12px;
    top: 6px;
    color: #424242;
    cursor: pointer;
}

.close::before {
    content: "\00D7";
}

.box .btn {
    position: absolute;
    text-decoration: none;
    width: 80px;
    height: 30px;
    background: #57bc54;
    border-radius: 8px;
    color: #fff;
    font-size: 16px;
    font-weight: normal;
    text-align: center;
    line-height: 30px;
    bottom: 15px;
    left: 175px;
}

.box p {
    width: 100%;
    height: 40px;
    line-height: 40px;
    display: inline-block;
    text-align: center;
    vertical-align: middle;
}
.box pre{
    font-family: "微软雅黑";
    text-align: right;
}

.box .bg {
    width: 54px;
    height: 45px;
    display: inline-block;
    background: url(../image/slt.png);
    background-size: 100% 100%;
    vertical-align: middle;
}

.box::after {
    clear: both;
}
.box span.intro{
    margin-top: 15px;
    text-indent: 2em;
    padding-right: 27px;
    height: 60px;
    display: inline-block;
    line-height: 30px;
}