body {
    margin: 0;
}

.red {
    color: red;
}

header a {
    text-decoration: none;
    color: black;
}

.header-top {
    /*line-height: 60px;*/
    /*border-bottom: 1px solid #EBEEF3;*/
    width: 66%;
    margin: 0 auto;
    /*background-color: #9acfea;*/
    overflow: hidden;
    line-height: 90px;
    height: 90px;
}

.header-top + hr {
    margin: 0;
    border: none;
    border-bottom: 1px solid #EBEEF3;
}

.header-top > div {
    float: left;
}

.header-logo {
    width: 150px;
    text-align: center;
}

.header-logo i {
    line-height: 90px;
    color: #3B85EB;
    font-size: 40px;
}

.header-area {
    padding: 0 15px;
    font-size: 14px;
}

.header-title {
}

.header-title div {
    /*background-color: grey;*/
    float: left;
    padding: 0 25px;
    font-size: 17px;
}

.header-title-active {
    background-color: #3B85EB !important;
    color: white;
}

.header-search input {
    width: 250px;
    height: 30px;
    border-radius: 50px;
    border: 1px solid #C4CBD3;
    margin-left: 80px;
}

.header-search input::placeholder {
    padding-left: 15px;
    font-size: 12px;
    color: #AAB0B7;
}

.header-tool {
    margin-left: 20px;
    color: #3b3f4f;
    font-size: 13px;
}

.header-tool input {
    background-color: white;
    border: 1px solid #CCCCCC;
    /*width: 70px;*/
    /*height: 35px;*/
    padding: 8px 10px 8px 10px;
    font-size: 13px;
}

.header-tool-student {
    border: none !important;
    background-color: #3388FF !important;
    color: white;
}

header .nav {
    text-align: center;
}

header .nav ul {
    display: inline-block;
    list-style-type: none;
}

header .nav li {
    float: left;
    padding: 5px 20px;
}

header .nav li a {
    font-size: 15px;
}

/*
banner分割线
banner分割线
banner分割线
banner分割线
banner分割线
*/

.banner {
    background-color: #4972CD;
    overflow: hidden;
}

.banner > div {
    float: left;
}

.banner-left {
    margin-left: 18%;
    width: 14%;
}

.banner-left ul {
    padding: 12px 10px;
    background-color: #2D323C;
    margin: 0;
}

.banner-left ul li {
    padding: 5px 10px;
    list-style-type: none;
}

.banner-left ul li a {
    font-size: 14px;
    color: white;
    text-decoration: none;
}

.banner-middle {
    background: url("./banner2.png");
    background-size: cover;
    height: 375px;
    width: 690px;
    background-repeat: no-repeat;
    border:1px solid transparent;
}

.banner-right {
    margin: 20px 0 0 20px;
}

.banner-right-top {
    text-align: center;
    padding: 10px 0;
    background-color: #E5EDFA;
}

.banner-right-main {
    background-color: #A4B9E6;
}

.banner-right-main ul {
    list-style-type: none;
    margin: 0;
    padding:0 0 0;
    overflow: hidden;
    width: 250px;
}

.banner-right-main li {
    /*border-radius: 50%;*/
    float: left;
    padding: 12px 12px;
}


.banner-right-main li img{
    border-radius: 50%;
}

.banner-right-main li span{
    /*border-radius: 50%;*/
    display: block;
    font-size: 13px;
}