* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: fontsc, PingFang SC, Helvetica Neue For Number, -apple-system, BlinkMacSystemFont, Segoe UI, Roboto, Hiragino Sans GB, Microsoft YaHei, Helvetica Neue, Helvetica, Arial, sans-serif;
}

button {
    border: none;
    cursor: pointer;
    outline: none;
    background: white;
}

html {
    -webkit-tap-highlight-color: transparent;
    background: #F5F5F5;
}

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

.top {
    width: 1200px;
    margin: auto;
    font-size: 14px;
    font-weight: 500;
    font-family: OPPOSans-M;
    color: #909399;
    padding: 20px 0;
}

    .top a {
        font-size: 14px;
        font-weight: 500;
        font-family: OPPOSans-M;
        color: #909399;
    }
    .top>a:hover{
        color: rgba(26, 140, 254, 1) !important;
    }

.top-active {
    color: black;
}
.index-contain-box{
    position: relative;
    width: 1200px;
    margin: auto;
}
.left-top {
    box-shadow: 0px 0px 1px 0px rgba(40, 41, 61, 0.04),0px 2px 4px 0px rgba(96, 97, 112, 0.16);
    width: 880px;
    background: #FFFFFF;
    padding: 20px 0 0 20px;
    margin-bottom: 20px;
}

.index-contain {
    width: 1200px;
    margin: auto;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;

}

.left-top-header {
    display: flex;
    justify-content: left;
    align-items: center;
}

    .left-top-header > img {
        width: 48px;
        height: 48px;
        display: block;
        margin-right: 10px;
    }

.left-top-word {
    font-family: OPPOSans-M;
    font-size: 24px;
    font-weight: 500;
    color: #303133;
}

.line {
    width: 840px;
    height: 1px;
    border: 1px solid #F5F5F5;
    margin: 10px auto 19px;
}

.left-top-foot {
    display: flex;
    justify-content: left;
    align-items: center;
    flex-wrap: wrap;
}

    .left-top-foot > div {
        font-family: OPPOSans-M;
        font-size: 12px;
        font-weight: 500;
        line-height: 16px;
        color: #999999;
        margin-right: 36px;
        margin-bottom: 10px;
    }

        .left-top-foot > div > span {
            color: #303133;
        }

.btn-download {
    width: 300px;
    height: 64px;
    background: #3E7BFA;
    display: block;
    text-align: center;
    font-family: OPPOSans;
    font-size: 20px;
    font-weight: 500;
    color: #FFFFFF !important;
    line-height: 64px;
    cursor: pointer;
    margin-bottom: 20px;
}

.btn-download > img{
    width: 34px;
    vertical-align: middle;
    margin-right: 10px;
}

.hot-doc {
    margin: 20px 0;
    background: #FFFFFF;
    box-sizing: border-box;
    border: 0.5px solid #D8D8D8;
    width: 300px;
    padding: 20px 20px 8px;
}

.hot-title {
    font-family: OPPOSans;
    font-size: 20px;
    font-weight: 500;
    letter-spacing: 0px;
    color: #3D3D3D;
    padding-bottom: 10px;
    border-bottom: 1px solid #D8D8D8;
    margin-bottom: 8px;
}

.hot-doc-item {
    justify-content: space-between;
    align-items: flex-start;
    display: flex;
    margin-bottom: 12px;
    cursor: pointer;
}
.hot-doc-item:hover .btn-hot-doc{
    background-color: #3E7BFA;
    color: white;
}
    .hot-doc-item > img {
        width: 28px;
        display: block;
    }

.hot-doc-name {
    font-size: 14px;
    font-weight: normal;
    letter-spacing: 0em;
    color: #3D3D3D;
    width: 175px;
    word-break: break-all;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.btn-hot {
    width: 40px;
    height: 24.41px;
    box-sizing: border-box;
    border: 1px solid #3E7BFA;
    text-align: center;
    font-family: OPPOSans;
    font-size: 12px;
    font-weight: 500;
    line-height: 22px;
    color: #3E7BFA;
    letter-spacing: 0px;
    border-radius: 5px;
    margin-top: 6px;
}
.btn-hot-doc{
    width: 40px;
    height: 24.41px;
    box-sizing: border-box;
    border: 1px solid #3E7BFA;
    text-align: center;
    font-family: OPPOSans;
    font-size: 12px;
    font-weight: 500;
    line-height: 22px;
    color: #3E7BFA;
    letter-spacing: 0px;
    border-radius: 5px;
    cursor: pointer;
    margin-top: 6px;
}
.btn-hot:hover {
    background-color: #3E7BFA;
    color: white;
}
.btn-hot-doc:hover {
    background-color: #3E7BFA;
    color: white;
}
.hot-course {
    background: #FFFFFF;
    box-sizing: border-box;
    border: 0.5px solid #D8D8D8;
    width: 300px;
    padding: 20px 20px 8px;
}

.hot-course-item {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 12px;
    cursor: pointer;
}

    .hot-course-item > img {
        width: 75px;
        height: 44px;
        display: block;
    }
.hot-course-item:hover .btn-hot-course{
    background-color: #3E7BFA;
    color: white;
}
.hot-course-name {
    font-size: 14px;
    font-weight: normal;
    letter-spacing: 0em;
    color: #3D3D3D;
    width: 133px;
    word-break: break-all;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.btn-hot-course {
    width: 40px;
    height: 24.41px;
    box-sizing: border-box;
    border: 1px solid #3E7BFA;
    text-align: center;
    font-family: OPPOSans;
    font-size: 12px;
    font-weight: 500;
    line-height: 22px;
    color: #3E7BFA;
    letter-spacing: 0px;
    border-radius: 5px;
    margin-top: 6px;
}

    .btn-hot-course:hover {
        background-color: #3E7BFA;
        color: white;
    }

.left-iframe {
    background: #FFFFFF;
    box-shadow: 0px 0px 1px 0px rgba(40, 41, 61, 0.04),0px 2px 4px 0px rgba(96, 97, 112, 0.16);
    width: 880px;
    height: 820px;
    margin: 20px 0;
}

.left-img {
    width: 880px;
}

.left-bottom {
    margin: auto;
    width: 880px;
    height: 170px;
    box-shadow: 0px 0px 1px 0px rgba(40, 41, 61, 0.04),0px 2px 4px 0px rgba(96, 97, 112, 0.16);
    padding: 40px 0 0;
    background: #FFFFFF;
    box-shadow: 0px 0px 1px 0px rgba(40, 41, 61, 0.04),0px 2px 4px 0px rgba(96, 97, 112, 0.16);
}

.left-word {
    font-family: 思源黑体;
    font-weight: 400;
    font-size: 16px;
    color: #3D3D3D;
    text-align: center;
}

.left-number {
    color: #FF3B3B;
}

.left-login {
    color: #3E7BFA;
    cursor: pointer;
}

.btn-box > button {
    background: #3E7BFA;
    padding: 8px 20px;
    border-radius: 20px;
    color: #FFFFFF;
    font-family: 思源黑体;
    font-size: 16px;
    font-weight: normal;
    letter-spacing: 0em;
}
.btn-box > a {
    background: #3E7BFA;
    padding: 8px 20px;
    border-radius: 20px;
    color: #FFFFFF;
    font-family: 思源黑体;
    font-size: 16px;
    font-weight: normal;
    letter-spacing: 0em;
}
.btn-box {
    text-align: center;
    margin: 30px auto 0;
}

.btn-doc {
    margin-right: 30px;
}
.prompt-box{
    width: 1200px;
    margin: auto;
    background-color: white;
}
.prompt {
    margin: auto;
    margin-top: 20px;
    padding: 20px;
    width: 880px;
    background: #FFFFFF;
    box-shadow: 0px 0px 1px 0px rgba(40, 41, 61, 0.04),0px 2px 4px 0px rgba(96, 97, 112, 0.16);
}

.prompt-title {
    font-family: OPPOSans;
    font-size: 18px;
    font-weight: bold;
    letter-spacing: 0px;
    color: #303133;
}

.prompt-line {
    width: 100%;
    border: 1px solid #E4E4EB;
    height: 0px;
    margin: 18px 0 20px;
    position: relative;
}

    .prompt-line::before {
        content: '';
        width: 71px;
        height: 2px;
        background: #1A8CFE;
        position: absolute;
        top: -2px;
        left: 0;
    }

.prompt-word {
    font-family: 思源黑体;
    font-size: 12px;
    font-weight: normal;
    line-height: 200%;
    letter-spacing: 0em;
    color: #3D3D3D;
}

.left-contain1 {
    /* display: none; */
    position: relative;
}

.left-info {
    width: 878px;
    background: #FFFFFF;
    box-shadow: 0px 0px 1px 0px rgba(40, 41, 61, 0.04),0px 2px 4px 0px rgba(96, 97, 112, 0.16);
    margin: 20px 0;
    padding: 20px;
}

.left-info-title {
    font-family: OPPOSans;
    font-size: 18px;
    font-weight: bold;
    letter-spacing: 0px;
    color: #303133;
}

.left-info-line {
    width: 100%;
    border: 1px solid #E4E4EB;
    height: 0px;
    margin: 18px 0 20px;
    position: relative;
}

    .left-info-line::before {
        content: '';
        width: 71px;
        height: 2px;
        background: #1A8CFE;
        position: absolute;
        top: -2px;
        left: 0;
    }

.left-info-word {
    font-family: OPPOSans;
    font-size: 14px;
    font-weight: normal;
    line-height: 200%;
    letter-spacing: 0px;
    color: #000000;
    text-align: justify;
}

.left-loc {
    box-shadow: 0px 0px 1px 0px rgba(40, 41, 61, 0.04),0px 2px 4px 0px rgba(96, 97, 112, 0.16);
    width: 880px;
    background: #FFFFFF;
    margin: 20px 0;
    padding: 20px;
}

.left-loc-title {
    font-family: OPPOSans;
    font-size: 14px;
    font-weight: 500;
    line-height: 16.41px;
    letter-spacing: 0px;
    color: #909399;
}

.btn-loc-dowm {
    background: #3E7BFA;
    width: 214.15px;
    height: 54px;
    border-radius: 5px;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 13px 0 30px;
    cursor: pointer;
}

    .btn-loc-dowm > img {
        width: 34px;
        margin-right: 15px;
    }

.left-loc-word1 {
    font-family: OPPOSans;
    font-size: 16px;
    font-weight: bold;
    line-height: 18.75px;
    letter-spacing: 0px;
    color: #FFFFFF;
}

.left-loc-word2 {
    font-family: OPPOSans;
    font-size: 12px;
    font-weight: 500;
    line-height: 14.06px;
    letter-spacing: 0px;
    color: #FFFFFF;
    opacity: 0.5;
}

.left-yun {
    box-sizing: border-box;
    border: 1px solid #A4D1FD;
    width: 229px;
    height: 42px;
    border-radius: 6px;
    padding: 6px;
    margin-top: 15px;
    cursor: pointer;
}

    .left-yun > img {
        width: 30px;
        vertical-align: middle;
    }

.left-yun-word {
    font-family: OPPOSans;
    font-size: 14px;
    font-weight: 500;
    line-height: 16.41px;
    letter-spacing: 0px;
    color: #606266;
}

.btn-yun {
    font-family: OPPOSans;
    font-size: 20px;
    font-weight: 500;
    letter-spacing: 0px;
    color: #FFFFFF;
    width: 300px;
    height: 64px;
    background: #3E7BFA;
    text-align: center;
    display: block;
}
.loc-guanggao {
    display: block;
    height: 60px;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    cursor: pointer;
}
.loc-guanggao-box{
    position: relative;
    display: none;
    overflow: hidden;
    width: 880px;
    height: 60px;
    margin: 20px auto 20px;
}
.crumb {
    font-family: OPPOSans;
    font-size: 14px;
    font-weight: 500;
    line-height: 20px;
    letter-spacing: 0px;
    cursor: pointer;
    color: #FFFFFF;
    width: 1200px;
    margin: auto;
}
.allow > span {
    font-family: OPPOSans;
    font-size: 14px;
    font-weight: 500;
    line-height: 20px;
    letter-spacing: 0px;
    color: #FFFFFF;
}
.left-contain1-top{
    width: 880px;
    padding: 0 15px;

    height: 35px;
    line-height: 35px;
    background-color: #fff;
    border-bottom: 1px solid #eee;
    padding: 0 15px;
    color: #999;
    box-sizing: border-box;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 3;
}
.left-img{
    width: 880px;
    display: block;
}
.left-contain1-top-left{
    color: #3D3D3D;
    font-size: 12px;
    cursor: pointer;
}
#page-num{
    background: #FFFFFF;
    box-sizing: border-box;
    border: 1px solid #E4E4EB;
    width: 24px;
height: 20px;
cursor: pointer;
font-family: Source Han Sans CN;
font-size: 12px;
font-weight: 500;
line-height: 150%;
color: #8F90A6;
outline: none;
text-align: center;
}
.left-contain1-top-right{
    font-family: Source Han Sans CN;
font-size: 12px;
font-weight: 500;
line-height: 150%;
letter-spacing: 0em;
color: #8F90A6;
}
.left-contain1-top-left>img{
    vertical-align: sub;
    width: 14px ;
}
.foot{
    margin-top: 105px;
    height: 177px;
    background-color: #000000;
}
.index-right{
    overflow: hidden;
}
.root{
    width: 1200px;
}
.root-box{
    width: 100%;
    position: fixed;
    bottom: 0;
    height: 72px;
    
}
.root{
    position: relative;
    width: 1200px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    margin: auto;
    padding: 0 60px;
    background: #FFFFFF;
    box-shadow: 0px 2px 8px 0px rgba(40, 41, 61, 0.08),0px 0px 32px 0px rgba(96, 97, 112, 0.24);
}
.root-left-top{
    font-family: OPPOSans;
font-size: 20px;
font-weight: 900;
line-height: normal;
letter-spacing: 0px;
color: #3D3D3D;
}
.root-left-top>span{
    box-sizing: border-box;
    border: 1px solid #FF3B3B;
    font-family: OPPOSans;
font-size: 10px;
font-weight: normal;
color: #FF3B3B;
line-height: normal;
}
.root-left-bottom{
    font-family: OPPOSans;
    font-size: 14px;
    font-weight: normal;
    line-height: normal;
    letter-spacing: 0px;
    color: #3D3D3D;
}
.btn-listen{
    width: 160px;
    height: 45px;
    font-family: OPPOSans;
    font-size: 14px;
    font-weight: normal;
    line-height: normal;
    color: #FFFFFF;
    background: #3E7BFA;
    border-radius: 5px;
}
.btn-close{
    position: absolute;
    width: 16px;
    display: block;
    top: 5px;
    right: 5px;
    cursor: pointer;
}
.page-number{
    color: #FF3B3B;
    font-size: 16px;
font-weight: bold;
line-height: 200%;
}
.screen-box{
    font-size: 12px;
    background-color: rgba(0, 0, 0);
    position: absolute;
    z-index: 2061;
    top: 0;
    width: 100%;
    display: none;
}
.screen{
    width:100%;
    height: 100%;
}
.screen-title-box{
    width: 100%;
    background-color: #282828;
    height: 40px;
    position: fixed;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
}
.screen-title{
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 1200px;
    height: 40px;
    margin: auto;
}
.screen-name>img{
    width: 16px;
    margin-right: 5px;
    vertical-align: bottom;
}
.screen-name{
    font-size: 16px;
    color: #fff;

}
#page-num-one{
    width: 30px;
    outline: none;
    text-align: center;
    height: 20px;
    border: 1px solid #e7e7e7;
    border-radius: 2px;
    box-sizing: border-box;
}
.screen-right-box{
    line-height: 40px;
    color: #999;
}
.btn-load-screen{
    background: #f7603e;
    width: 80px;
    height: 28px;
    font-size: 12px;
    color: white;
    margin-left: 20px;
}
.close-screen{
    position: absolute;
    top: 10px;
    right: 10px;
    width: 20px;
    cursor: pointer;
}
.screen-img{
    width: 800px;
    margin: auto;
    display: block;
}
.screen-img-box{
    width: 1200px;
    padding: 20px;
    margin: auto;
    background-color: white;
}
.screen-bottom{
    position: fixed;
    width: 1200px;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    background-color: white;
    padding: 0 35px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 75px;
}
.screen-bottom-left>img{
    width: 40px;
    display: block;
    margin-right: 10px;
}
.screen-bottom-left{
    display: flex;
    justify-self: left;
    align-items: center;
}
.screen-bottom-word1{
    font-size: 16px;
    line-height: 20px;
    color: #333;
}
.screen-bottom-word2{
    font-size: 12px;
    color: #bbb;
    margin-top: 4px;
    text-align: left;
}
.btn-load-screen-right{
    border-radius: 30px;
    text-align: center;
    position: absolute;
    right: 30px;
    top: 21px;
    width: 130px;
    height: 35px;
    line-height: 33px;
    font-size: 16px;
    background: #3E7BFA;
    color: #fff;
}
.screen-contain{
    padding-top: 60px;
}
.left-bottom-box{
    width: 1200px;
    background-color: white;
    margin: auto;
}
.toastBox {
    display: none;
    position: fixed;
    top: 50%;
    left: 0;
    text-align: center;
    width: 100%;
    height: 48px;
    line-height: 48px;
    transform: translateY(-50%);
    z-index: 9999;
}

.toastBox .tobox {
    display: inline-block;
    padding: 0 25px;
    color: white;
    font-size: 18px;
    background-color: black;
    opacity: 0.8;
    border-radius: 10px;
    letter-spacing: 1px;
}