body{
    margin: 0;
    font-family: "Pingfang SC", "Helvetica Neue", "Microsoft Yahei", Helvetica, Arial, "Hiragino Sans GB", "Microsoft Sans Serif", "WenQuanYi Micro Hei", sans;
    min-height: 100vh;
    box-sizing: border-box;
    padding: 30px 0;
}
ul {
    margin: 0;
    padding: 0;
}
li {
    list-style: none;
}
a {
    text-decoration: none;
}

.nav {
    position: relative;
    height: 60px;
}
.nav img {
    position: absolute;
    width: 160px;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
}
.mallLink {
    color: #99cc00;
}
@media (min-width: 501px){
    body{
        padding: 0;
    }
    .main {
        width: 80%;
        margin: 0 auto;
    }
    .content  {
        position: relative;
        height: calc(100vh - 160px);
    }
    .content h3 {
        margin-top: 0;
        margin-bottom: 40px;
        font-size: 30px;
    }
    .center {
        position: absolute;
        width: 65%;
        left: 50%;
        top: 50%;
        transform: translate(-50%,-50%);
        color: #333;
        text-align: center;
    }
    .center p {
        margin-bottom: 30px;
        line-height: 25px;
        text-align: justify;
    }
    .quick {
        margin-bottom: 30px;
        text-align: left;
    }
    .quick span {
        display: inline-block;
        font-size: 18px;
        font-weight: 700;
    }
    ul {
        display: inline-block;
    }
    li {
        display: inline-block;
    }
    .quickEntry a {
        display: inline-block;
        margin-right: 20px;
        padding: 5px 12px;
        box-shadow: 1px 1px 3px 0 rgba(0,0,0,.2);
        border-radius: 2px;
        color: #333;
        cursor: pointer;
    }
    .quickEntry .active {
        background: #99cc00;
        color: #fff;
    }
    .footer {
        height: 100px;
        line-height: 100px;
        font-size: 14px;
        text-align: center;
        color: #666;
    }
    .footer br {
        display: none;
    }
    .footer a {
        color: #666;
    }
}
@media (max-width: 500px){
    body{
        padding: 0;
    }
    .nav img {
        left: 15px;
    }
    .content {
        padding: 0 15px;
    }
    .center {
        text-align: center;
    }
    .center h3 {
        margin-bottom: 40px;
        font-size: 20px;
    }
    .center p {
        margin-bottom: 30px;
        text-align: justify;
    }
    .quick {
        overflow: hidden;
    }
    .quick .left{
        display: block;
        font-weight: 600;
        text-align: left;
    }
    .quick .right {
        /* float: right;
        width: calc(100% - 80px); */
        margin-left: 3px;
        margin-top: 20px;
        text-align: left;
    }
    .quickEntry a {
        display: inline-block;
        margin-top: 2px;
        margin-bottom: 10px;
        margin-right: 10px;
        padding: 5px 10px;
        box-shadow: 0 0 2px 0 rgba(0,0,0,.2);
        border-radius: 2px;
        color: #333;
        cursor: pointer;
    }
    .footer {
        margin-top: 50px;
        padding: 0 15px;
        font-size: 14px;
        text-align: center;
        color: #666;
    }
    .footer a {
        color: #666;
    }
}