Web1020/1_html+css/day5/demo/index.css

* {
    margin: 0;
    padding: 0;
    list-style: none;
    text-decoration: none;
    box-sizing: border-box;
}
#header {
    width: 100%;
    height: 75px;
}
#header .container {
    width: 1260px;
    height: 100%;
    margin: 0 auto;
    padding-top: 14px;
}
#header .container .logo {
    width: 149px;
    height: 45px;
    float: left;
    background: url('./images/soso.png') 219px 62px;
}
#header .container .nav {
    width: 352px;
    height: 75px;
    float: left;
    margin-top: -14px;
    margin-left: 30px;
    position: relative;
} 
#header .container .nav ul {
    overflow: hidden;
}
#header .container .nav ul li {
    float: left;
    line-height: 75px;
    margin-left: 30px;
}
#header .container .nav ul li:first-child {
    margin-left: 0;
}
#header .container .nav ul li a {
    color: #000;
    font-size: 16px;
}

#header .container .nav ul li:first-child a {
    color: #31CCFF;
}
#header .container .nav ul li a:hover {
    color: #31CCFF;
}
#header .container .nav .tips {
    width: 37px;
    height: 14px;
    color: #999;
    font-size: 12px;
    text-align: center;
    line-height: 14px;
    background: #f5f7f9;
    border: 1px solid #ddd;
    border-radius: 8px;
    position: absolute;
    top: 14px;
    right: 8px;
}
#header .container .btn {
    width: 100px;
    height: 38px;
    text-align: center;
    line-height: 38px;
    color: #fff;
    background: #1ebcf0;
    float: right;
    border-radius: 3px;
    font-size: 16px;
    margin-right: 12px;
    margin-top: 4px;
    border: 1px solid #1ebcf0;
}
#header .container .btn:hover {
    background: #31CCFF;
}
#main .banner {
    width: 1920px;
    height: 482px;
    margin: 0 auto;
    position: relative;
}
#main .banner .search {
    width: 692px;
    height: 59px;
    background: rgba(0, 0, 0, .15);
    border-radius: 4px;
    padding-top: 4.5px;
    position: absolute;
    top: 214px;
    left: 616px;
}
#main .banner .search input {
    width: 588px;
    height: 50px;
    float: left;
    margin-left: 3px;
    outline: none;
    border-radius: 4px;
    border:1px solid #ccc;
    position: relative;
    background: rgba(255, 255, 255, .88);;
}
#main .banner  .word {
    color: #999;
    font-size: 14px;
    position: absolute;
    top: 234px;
    left: 650px;
    z-index: 9;
}
#main .banner .search img {
    width: 97px;
    height: 50px;
    float: left;
}
#main .list {
    width: 1260px;
    height: 388px;
    margin: 60px auto 100px;
}
#main .list .listItem {
    width: 290px;
    height: 288px;
    float: left;
    margin-left: 33px;
    margin-top: 50px;
}
#main .list .listItem:first-child {
    margin-left: 0;
}
#main .list .listItem .pictures {
    width: 290px;
    height: 200px;
    position: relative;
}
#main .list .listItem img {
    width: 100%;
    height: 200px;
}
#main .list .listItem .btn {
    margin-top: 45px;
}

#main .list .listItem span:nth-child(2) {
    margin-left: 40px;
}
#main .list .listItem span {
    width: 122px;
    height: 36px;
    font-size: 14px;
    color: #666;
    display: inline-block;
    text-align: center;
    line-height: 36px;
    border:1px solid #dfdfdf;
}

#main .list .listItem span:hover {
    color: #31CCFF;
}

#main .list .listItem .pertty {
    width: 290px;
    height: 50px;
    color: #fff;
    font-size: 16px;
    text-align: center;
    line-height: 50px;
    background: rgba(0, 0, 0, .5);
    position: absolute;
    top: 150px;
    left: 0;
    display: none;
}
#main .list .listItem .pictures:hover .pertty{
    display: block;
}