/** 全局样式 **/
* {
    margin: 0px;
    padding: 0px;
}

body {
    font-size: 14px;
}

li {
    list-style: none;
}

a {
    color: #000;
    text-decoration: none;
}

.fl {
    float: left;
}

.fr {
    float: right;
}

.clear {
    clear: both
}


/** index.html **/
.header {
    width: 1200px;
    margin: 0px auto;
}

.logo {
    width: 100%;
    height: 56px;
    margin: 20px 0px;
}

.logoleft {
    width: 238px;
    height: 56px;

}

.logoright {
    width: 259px;
    height: 27px;
}

.menu {
    width: 100%;
    height: 50px;
}

.menubtn {
    width: 242px;
    height: 50px;
    /**background:url(../img/course_menu_bg.png) no-repeat;**/
    background-image: url(../img/course_menu_bg.png);
    background-repeat: no-repeat;
    padding-left: 100px;
}

.menubtn a {
    color: white;
    font-size: 18px;
    line-height: 50px;
}

.menu ul li {
    width: 130px;
    height: 50px;
    float: left;
    text-align: center;
    line-height: 50px;
}

.menu ul li a {
    font-size: 16px;
}

.main {
    width: 100%;
}

.banner {
    width: 100%;
    height: 400px;
    background: #000000 url("../img/banner.png") no-repeat center center;
}

.banner .title {
    text-align: center;
    color: white;
    font-size: 50px;
    padding-top: 155px;
}

.nav {
    width: 1200px;
    height: 80px;
    margin: 0px auto;
    justify-content: center;
    display: flex;
}

.nav ul {
    padding: 20px 0px;
}

.nav ul li {
    width: 299px;
    height: 40px;
    float: left;
    text-align: center;
    line-height: 40px;
}


.nav ul li a {
    font-size: 18px;
}

.infobg {
    width: 100%;
    padding: 60px 0px;
    background-color: #f3f3f3;
}

.info {
    width: 1200px;
    height: 480px;
    background-color: #fff;
    margin: 0px auto;
    text-indent: 2em;
    padding: 15px;

}

.footer {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 120px;
    background: #23282d;
    color: #ffffff;
}