ul,
li,
h2,
h3,
h4 {
    margin: 0;
    padding: 0;
}

li {
    list-style-type: none;
}

h2,
h3,
h4 {
    font-weight: normal;
    font-family: PingFang-SC-Medium;
}

body {
    background: #f7f7f7;
}

.banner-section {
    height: 220px;
    margin: 50px 0;
    background: #242c3e url(../images/banner_bg.png) no-repeat center;
    text-align: center;
    font-size: 0;
}

.banner-section:after {
    content: '';
    height: 100%;
    display: inline-block;
    vertical-align: middle;
}

.banner-section .banner-content {
    display: inline-block;
    vertical-align: middle;
    color: #fff;
}

.banner-section .banner-content h2 {
    font-size: 38px;
    margin-bottom: 5px;
}

.banner-section .banner-content small {
    font-size: 16px;
    opacity: .6;
}

.content-section {
    width: 1180px;
    margin: 0 auto;
}

.case-list {
    margin: 0 -10px 80px;
}

.case-list li {
    box-sizing: border-box;
    float: left;
    position: relative;
    margin: 0 10px 20px;
    padding: 10px;
    width: 380px;
    height: 300px;
    overflow: hidden;
    background: #FFFFFF;
    border: 1px solid #EEF2F5;
    border-radius: 2px;
}

.case-list .caseImg-wrap {
    position: relative;
    height: 208px;
}

.case-list .caseImg-wrap img {
    width: 100%;
    height: 100%;
}

.case-list .caseTitle-wrap {
    position: absolute;
    left: 0;
    right: 0;
    top: 66px;
    text-align: center;
    color: #fff;
}

.case-list .caseTitle-wrap h3 {
    font-size: 26px;
    font-weight: bold;
}

.case-list .caseTitle-wrap small {
    font-size: 12px;
}

.case-list .caseDesc-wrap {
    box-sizing: border-box;
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    max-height: 82px;
    padding: 20px;
    background-color: #fff;
    transition: max-height .5s;
    -webkit-transition: max-height .5s;
}

.case-list .caseDesc-wrap h4 {
    font-size: 14px;
    font-weight: bold;
    color: #333;
    line-height: 1em;
    margin-bottom: 9px;
}

.case-list .caseDesc-wrap small {
    display: block;
    font-size: 12px;
    color: #777;
    max-height: 20px;
    overflow: hidden;
    transition: max-height .5s;
    -webkit-transition: max-height .5s;
}

.case-list li:hover a {
    text-decoration: none;
}

.case-list li:hover .caseDesc-wrap small {
    max-height: 58px;
}

.case-list li:hover .caseDesc-wrap {
    max-height: 120px;
}