/* banner整体布局开始 */
#banner {
    /* 把banner-box挤到中间 */
    padding: 32px 0;
    /* 这个过渡，是为了渐变背景的切换自然 */
    transition: 1s;
}

.banner-box {
    height: 482px;
    /* background-color: rgb(134, 181, 198); */
}

.g-banner {
    height: 382px;
    /* background-color: rgb(226, 192, 192); */
}

.course-list {
    width: 256px;
    height: 382px;
    background-color: #39364d;
    color: #fff;
    border-radius: 8px 0 0 0;
}

.swiper {
    width: 896px;
    height: 382px;
    background-color: rgb(226, 192, 192);
    border-radius: 0 8px 0 0;
    /* 父相子绝，内部的切换按钮，圆点就可以绝对定位 */
    position: relative;
}

.sys-class {
    height: 100px;
    border-radius: 0 0 8px 8px;
    box-shadow: 0 5px 20px 0 rgb(0 0 0 / 30%);
    padding: 25px 0;
    box-sizing: border-box;
}

/* banner整体布局结束 */

/* 课程分类列表开始 */
.course-list ul {
    margin-top: 20px;
}

.course-list li {
    height: 50px;
    line-height: 50px;
    padding: 0 10px;
}

.course-list li:hover {
    background: rgba(255, 255, 255, .1);
    cursor: pointer;
}

.course-list .title {
    font-size: 14px;
}

.course-list .sub-title {
    font-size: 12px;
}

.course-list .iconfont {
    float: right;
    font-size: 10px;
    color: rgba(255, 255, 255, .5);
}

/* 课程分类列表结束 */

/* 轮播图 */
.swiper a {
    display: block;
    width: 896px;
    height: 382px;
    background-image: url(../images/swiper/swiper-1.jpg );
    background-size: 896px;
    border-radius: 0 8px 0 0;
    /* 1秒内完成切换，过渡效果 */
    transition: 1s;
}

/* 左右切换按钮 */
.swiper .arrow {
    position: absolute;
    /* 垂直居中: 离顶部50%-自身高度的一半 */
    top: 50%;
    margin-top: -24px;
    width: 48px;
    height: 48px;
    /* 同时设置背景色、背景图，背景图位置，尺寸 */
    background: rgba(28, 31, 33, .2) url(../images/icon-left-small.png) no-repeat center/16px auto;
    border-radius: 50%;
    color: #fff;
    transition: .5s;
}

.swiper .arrow:hover {
    background-color: rgba(28, 31, 33, .5);
    transition: .5s;
}

.prev {
    left: 20px;
}

.next {
    right: 20px;
    /* 右三角使用左三角水平翻转180度即可，nice */
    transform: rotate(180deg);
}

/* 切图圆点 */
.circle-list {
    position: absolute;
    right: 25px;
    bottom: 15px;
}

.circle-list li {
    cursor: pointer;
    display: inline-block;
    width: 8px;
    height: 8px;
    margin-left: 8px;
    border-radius: 4px;
    background: rgba(255, 255, 255, .75);
    cursor: pointer;
    transition: all .2s;
}

.circle-list li.current {
    width: 20px;
}

/* 下方体系课 */
.sys-icon-box {
    display: inline-block;
    padding: 0 16px;
    background: #fff;
    margin-left: 15px;
}

.sys-icon-box .sys-icon {
    width: 45px;
    height: 45px;
    background-size: cover;
    margin-right: 8px;
}

.sys-icon-box .title:hover h4 {
    color: #ec1500;
}

.sys-icon-box h4 {
    font-size: 14px;
}

.sys-icon-box p {
    font-size: 12px;
}

.sys-class .line {
    display: inline-block;
    width: 2px;
    height: 40px;
    background-color: #e8e8e8;
}

.sys-class .more-btn {
    display: inline-block;
    font-size: 12px;
    margin-left: 30px;
    position: relative;
    bottom: 10px;
}

.sys-class .more-btn .iconfont {
    font-size: 12px;
}

.sys-icon {
    transition: .2s;
}

.sys-icon:hover {
    transform: rotate(30deg);
    opacity: .5;
}

.banner-container {
    height: 220px;
    width: 100%;
    background-image: url(../images/tixi/banner3.png);
    background-size: 100% 100%;
    background-position: center;
    background-repeat: no-repeat;
    text-align: center;
}

.banner-container .wrap {
    width: 1152px;
    margin: 0 auto;
    height: 100%;
    padding-top: 75px;
    box-sizing: border-box;
    position: relative;
}


.banner-container .wrap .logo-class {
    width: 126px;
    height: 46px;
    background-image: url(../images/tixi/logo-class.png);
    background-size: 100% 100%;
    background-position: center;
    background-repeat: no-repeat;
    position: absolute;
    left: 0;
    top: 24px;
}

.banner-container .wrap .top-desc {
    height: 12px;
    position: absolute;
    left: 134px;
    top: 46px;
    font-size: 12px;
    color: #545c63;
    letter-spacing: 1px;
    line-height: 12px;
}

.banner-container .wrap h2 {
    font-size: 60px;
    font-weight: 700;
    color: #545c63;
    letter-spacing: 4.69px;
    text-align: center;
    line-height: 60px;
    margin-bottom: 20px;
}

.banner-container .wrap .desc {
    display: inline-block;
    font-size: 19px;
    color: #545c63;
    text-align: center;
    line-height: 24px;
    font-weight: 300;
}