body header {
    width: 100%;
    border-bottom: #dedede solid 1px;
    box-shadow: 1px 1px 3px #ddd;
    background: #ffffff;
    position: initial;
}
.downloadBannerBigBox{
    width:100%;
    background:url(/Img/Download/bannerBg.jpg) no-repeat;
}
.downLoadBannerbox{
    width:100%;
    margin:0 auto;
    font-size:0px;
    text-align:center;
    padding:0px;
    clear:both;
}
.downLoadBannerLf{
    width:49%;
    display:inline-block;
    vertical-align:middle;
    margin:0px;
}

.downLoadBannerLf img{
    margin-top:50px;
    display:block;
}
.downLoadBannerRg{
    width:49%;
    display:inline-block;
    vertical-align:middle;
    margin:0px;
    border:0px;
}
.dBannerRgBottom{
    font-size: 0;
    position:relative;
}
.dBannerRgBottomLf,.dBannerRgBottomRg{
    display: inline-block;
    vertical-align: middle;
}
.dBannerRgBottomLf{
    width:220px;
    overflow: hidden;
    margin-right:50px;
}
.dBannerRgBottomRg{
    width:140px;
    overflow: hidden;
}
.dBannerRgBottomLf a{
    display:block;
}
.dBannerRgBottomLf img{
    width:100%;
    margin:10px 0;
    cursor:pointer;
}
.dBannerRgBottomRg img{
    width:100%;
}
.dBannerRgTop{
    line-height:1.5;
    color: #fff;
    margin-bottom:45px;
}
.dBannerRgTop h2{
    font-size: 56px;
    font-family: "宋体";
    
}
.dBannerRgTop p{
    font-size:30px;
}
.downloadExerciseBigBox{
    width:100%;
    background:#fff;
    height:560px;
    padding:56px 0;
}
.downloadExerciseBox{
    width:1200px;
    margin:0 auto;
    font-size:0;
}
.downloadExerciseLf,.downloadExerciseRg{
    display:inline-block;
    width:49%;
    vertical-align:middle;
    line-height:2;
}

.downloadLessonBigBox{
    width:100%;
    height:560px;
    padding:56px 0;
}
.downloadLessonBox{
    width:1200px;
    margin:0 auto;
    font-size:0;
}
.downloadLessonLf,.downloadLessonRg{
    display:inline-block;
    width:49%;
    vertical-align:middle;
    line-height:2;
}
.appDownList{}
.iosAppDown{
}
.iosImg{
    position: absolute;
    top: -206px;
    left: 50%;
    width: 183px;
    height: 157px;
    margin-left: -226px;
    display: none;
}
.iosImg p{font-size:13px;text-align:center;color:#fff}
.dBannerRgBottomLf .iosImg img{
    display: block;
    margin: 10px auto;
    width: 180px;
}



/* Extra small devices (phones, 600px and down) */
@media only screen and (max-width: 600px) {
    /*banner*/
    .downLoadBannerLf{margin-top: 20px;vertical-align:bottom;}
    .downLoadBannerLf img{width: 92%;display: block;margin-top: 45px;margin: 0 auto;}
    .downLoadBannerRg{margin-top: 17px;text-align:center;}
    .dBannerRgTop{margin-bottom:0;}
    .dBannerRgTop h2{font-size: 14px;}
    .dBannerRgTop p{font-size: 12px;}
    .dBannerRgBottomLf{width:auto;margin-right:0;}
    .dBannerRgBottomLf img{width: 60%;margin: 2px 0;}
    .dBannerRgBottomRg{width:auto;display:block;}
    .dBannerRgBottomRg img{width: 37%;}
    /*content*/
    .downloadExerciseBox{width:100%;}
    .downloadExerciseLf{text-align: center;}
    .downloadExerciseLfBox{text-align: left;display: inline-block;    padding-left: 10px;}
    .downloadExerciseBigBox{height:300px;padding:38px 0;}
    .downloadExerciseLf h2{font-size:16px;}
    .downloadExerciseLf p{font-size:14px;}
    .downloadExerciseRg img{width:150px;}

    .downloadLessonBox{width:100%;}
    .downloadLessonRg{text-align: center;}
    .downloadLessonRgBox{text-align: left;display: inline-block;}
    .downloadLessonBigBox{height:300px;padding:38px 0;}
    .downloadLessonRg h2{font-size:16px;}
    .downloadLessonRg p{font-size:14px;}
    .downloadLessonLf{padding-left:inherit;}
    .downloadLessonLf img{width:120px;margin: 0 auto;display: block;}
    .assess img{width:120px;margin: 0 auto;display: block;}

}

/* Small devices (portrait tablets and large phones, 600px and up) */
@media only screen and (min-width: 600px) {
    /*banner*/
    .downLoadBannerbox{text-align:center;}
    .downLoadBannerLf{width: 40%;margin-left: 60px;vertical-align:bottom;}
    .downLoadBannerLf img{width: 87%;margin-top: 45px;}
    .downLoadBannerRg{width: 48%;margin-top: 26px;}
    .dBannerRgTop{margin-bottom:0;}
    .dBannerRgTop h2{font-size: 28px;}
    .dBannerRgTop p{font-size: 20px;}
    .dBannerRgBottomLf{width:auto;margin-right:0;}
    .dBannerRgBottomLf img{width: 80%;margin: 6px 0;}
    .dBannerRgBottomRg{width:auto;display:block;}
    .dBannerRgBottomRg img{width: 30%;}
    .downloadExerciseLf h2{font-size:28px;}
    .downloadExerciseLf p{font-size:20px;}
    /*content*/
     .downloadExerciseBox{width:100%;}
     .downloadExerciseLf{text-align: center;}
     .downloadExerciseLfBox{text-align: left;display: inline-block;}
     .downloadExerciseLf, .downloadExerciseRg{width:46%;}

     .downloadLessonBox{width:100%;}
     .downloadLessonRg{text-align: center;}
     .downloadLessonRgBox{text-align: left;display: inline-block;}
     .downloadLessonLf, .downloadLessonRg{width:46%;}
     .downloadLessonLf{padding-left:inherit;}
     .downloadLessonLf img{display:block;margin:0 auto;width: 206px;}
     .downloadLessonRg h2{font-size:28px;}
     .downloadLessonRg p{font-size:20px;}
     .downloadExerciseBigBox{height: 460px;padding: 35px 0;}
     .downloadExerciseRg img{width: 270px;display: block;margin: 0 auto;}
     .assess img{width: 204px;margin: 0 auto;display: block;}
     .downloadLessonBigBox{height: 460px;padding: 35px 0;}
}

/* Medium devices (landscape tablets, 768px and up) */
@media only screen and (min-width: 768px) {
    /*banner*/
     .downLoadBannerLf{width: 40%;margin-left: 60px;vertical-align:middle;}
    .downLoadBannerLf img{width: 87%;margin-top: 45px;}
    .downLoadBannerRg{width: 48%;margin-top: 26px;}
    .dBannerRgTop{margin-bottom:0;}
    .dBannerRgTop h2{font-size: 34px;}
    .dBannerRgTop p{font-size: 24px;}
    .dBannerRgBottomLf{width:auto;margin-right:0;}
    .dBannerRgBottomLf img{width: 80%;margin: 6px 0;}
    .dBannerRgBottomRg{width:155px;display:inline-block;}
    .downLoadBannerRgBox{text-align:left;}
    .dBannerRgBottom{margin-top:15px;}
    .dBannerRgBottomRg img{width: 85%;}
     /*content*/
     .downloadExerciseBox{width:100%;}
     .downloadExerciseBigBox{height:auto;}    
     .downloadExerciseLf{text-align: center;}
     .downloadExerciseLfBox{text-align: left;display: inline-block;}

} 

/* Large devices (laptops/desktops, 992px and up) */
@media only screen and (min-width: 992px) {
    /*banner*/
     .downLoadBannerbox{max-height:490px;}
     .downLoadBannerLf img{width:80%;}
     .downLoadBannerRgBox{text-align:left;}
     .dBannerRgBottomRg{width:130px;display:inline-block;}
     .dBannerRgBottom{margin-top:15px;}
     .dBannerRgBottomRg img{width: 100%;}
     /*content*/
     .downloadExerciseBox{width:100%;}
     .downloadExerciseLf{text-align: center;}
     .downloadExerciseLfBox{text-align: left;display: inline-block;}
} 

/* Extra large devices (large laptops and desktops, 1200px and up) */
@media only screen and (min-width: 1200px) {
    /*banner*/
    .downLoadBannerbox{height:490px;width:1200px}
    .downLoadBannerLf img{width:384px;margin-top: 73px;}
    .dBannerRgBottomLf{margin:10px 0}
    .dBannerRgBottomLf img{width: 86%;}
    .dBannerRgBottomRg img{width: 100%;}
    .dBannerRgTop h2{font-size: 44px;}
    .dBannerRgTop p{font-size: 28px;}
    .downLoadBannerRgBox{text-align:left;width: 78%;margin-left: 18%;}
    .dBannerRgBottomRg{width:140px;display:inline-block;}
    .dBannerRgBottom{margin-top:15px;}
    /*content*/
     .downloadExerciseBox{width:1200px;}
     .downloadLessonBox{width:1200px;}
     .downloadExerciseLf{text-align: center;}
     .downloadExerciseLfBox{text-align: left;display: inline-block;}
     .downloadLessonBigBox{height: 560px;padding: 50px 0;}
     .downloadExerciseBigBox{height: 560px;padding: 50px 0;}
     .downloadExerciseRg img{width:auto;}
     .downloadLessonLf img{width:auto;}
     .downloadExerciseLf h2{font-size: 34px;}
     .downloadExerciseLf p{font-size: 26px;}
     .downloadLessonRg h2{font-size: 34px;}
     .downloadLessonRg p{font-size: 34px;}
}

.WeiXinNoDown{text-align:right;background-color: rgba(0,0,0,0.7);position: absolute;top: 0px;left: 0px;min-height: 300px;padding-top: 10px;}
.divImg{width: 80%;height: 227px;position: fixed;top: 0;right: 10px;}
.divImg img{width: 100%;margin: 0 auto;display: block;}