button,input,optgroup,select,textarea {
    margin: 0;
    font: inherit;
    color: inherit;
    outline: none;
}


.clearfix::after {
    clear: both;
    content: ".";
    display: block;
    height: 0;
    visibility: hidden;
}

.clearfix {
}

/* 必要布局样式css */

.product-num-box{
    width: 100%;
    height: 680px;
    background-color: #3e88f1;
    background-image: url(../images/pre-bg.png);
    background-repeat: no-repeat;
    background-position:center;
    background-size:100%;
}

.product-num-content{
    width: 1200px;
    height: 577px;
    margin: 0 auto;
    text-align: center;
    font-size: 0;
}

.product-num-title{
    padding-top: 110px;
    margin-bottom: 30px;
    font-size: 42px;
    color: #fff;
    line-height: 45px;
    font-family: -apple-system,BlinkMacSystemFont,Roboto,Helvetica Neue,Helvetica,PingFangSC-Medium,Hiragino Sans GB,Microsoft YaHei,SimSun,sans-serif;
}
.product-num-text{
    font-size: 16px;
    color: #fff;
    line-height: 28px;
}

.product-num-head{
    margin-top: 80px;
    font-size: 0;
}

.product-num-item{
    text-align: center;
    position: relative;
    display: inline-block;
    width: 400px;
    font-size: 108px;
    color: #fff;
    line-height: 62px;
    font-family: -apple-system,BlinkMacSystemFont,Roboto,Helvetica Neue,Helvetica,PingFangSC,Hiragino Sans GB,Microsoft YaHei,SimSun,sans-serif;
}

.product-num-jus{
    display: inline-block;
    margin: 80px 0;
    width: 162px;
    height: 56px;
    font-size: 22px;
    color: #fff;
    line-height: 48px;
    letter-spacing: 2px;
    border: 4px solid #fff;
    cursor: pointer;
    font-weight: 500;
    font-family: -apple-system,BlinkMacSystemFont,Roboto,Helvetica Neue,Helvetica,PingFangSC-Medium,Hiragino Sans GB,Microsoft YaHei,SimSun,sans-serif;
    -webkit-transition: all .3s linear;
    -moz-transition: all .3s linear;
    transition: all .3s linear;
    text-decoration: none;
}

.product-num-nub{
    display: inline-block;
    font-size: 108px;
    color: #fff;
    line-height: 62px;
    font-family: -apple-system,BlinkMacSystemFont,Roboto,Helvetica Neue,Helvetica,PingFangSC,Hiragino Sans GB,Microsoft YaHei,SimSun,sans-serif;
}

.product-num-add{
    font-size: 24px;
    color: #fff;
    margin-left: -20px;
    position: absolute;
    right: 75px;
    top: 30px;
}

.product-num-inf{
    margin-top: 24px;
    font-size: 28px;
    color: #fff;
    line-height: 0;
    margin-left: 30px;
}

.product-num-jus:hover{
    background-color: #fff;
    color: #3e88f1;
}

.product-num-wan{
    position:absolute;
    right: 55px;
    top: 0px;
}