.tab-title a {
    display: none;
}
.back-nav{
	font-size: 30px;
    font-weight: bold;
    color: rgb(255, 255, 255);
    display: block;
}

@media (max-width: 479px) {
.works-page{padding-bottom: 20px !important;width: 100%;margin:0 auto;}
.iframe-box iframe{width: 100%;height: 540px;}
}
@media (max-width: 768px) {
.xiangguan a{margin-bottom: 60px !important;}
.works-title-font-size{font-size: 17px;margin-top: 2px;font-weight: bold;}
.back{margin-top: 25px;}
#page{padding: 0 15px;}
.xiangguan a{width: 49%;margin-right: 1%;}
#collection-page{width: 100%;}
}
@media (min-width: 480px) and (max-width: 767px)  {
.works-title-font-size{font-size: 18px;margin-top: 2px;font-weight: bold;}
.iframe-box iframe{width: 100%;height: 540px;}
}

@media (min-width: 768px) and (max-width: 999px){
.works-title-font-size{font-size: 22px;margin-top: 2px;font-weight: bold;}
.xiangguan a{width: 32%;margin-right: 1%;}
.iframe-box iframe{width: 100%;height: 540px;}
}

@media (min-width: 1000px) {
.works-title-font-size{font-size: 16px;margin-top: 2px;font-weight: 500;}
.iframe-box iframe{width: 1200px;height: 700px;}
.xiangguan a{width: 24%;margin-right: 1%;}
}
@media (min-width: 1200px) {
.works-page{width: 800px;margin:0 auto;}
}
@media (min-width: 1366px) {
.works-page{width: 800px;margin:0 auto;}
}

@media (min-width: 1600px) {
.works-page{width: 1000px;margin:0 auto;}
}