@media screen and (min-width:768px) {
    .top-bar2 .dropdown-icon {
        color: #fff !important;
    }

    .nopadding {
        padding-top: 0 !important;
    }

    .tip {
        text-align: center;
        margin-top: 80px;
    }
    .prodect_childer_video_title {
        width: 100%;
        position: absolute;
        left: 50%;
        top: 50%;
        transform: translate(-50%, -50%);
        z-index: 100;
    }
    .prodect_childer_video_title h2 {
        font-size: 80px;
        line-height: 120px;
        color: #fff;
        text-align: center;
        letter-spacing:6px;
    }

    .prodect_childer_video::before {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        content: "";
        background-color: rgba(3,15,39,0.5);
        z-index: 10 !important
    }
    .prodect_childer_video_title a {
        padding: 14px 30px;
        display: inline-block;
        margin-left: 10px;
        margin-right: 10px;
        background-color: transparent;
        color: #fff;
        font-size: 16px;
        border-radius: 4px;
        text-align: center;
        border: 1px solid #fff;
    }
    .prodect_childer_video_title a i{
        width:24px;
        height:24px;
        float:left;
        margin-top: -2px;
        margin-right: 10px;
    }
    .prodect_childer_video_title a i img{
        width:100%;
        height:100%;
    }
    .prodect_childer_video_title a:hover {
        background-color: #f76660;
        border: 1px solid #f76660
    }
    .prodect_childer_shengwu_video_title a:hover {
        background-color: #69bead;
        border: 1px solid #69bead
    }
    .prodect_childer_wuli_video_title a:hover {
        background-color: #98ca67;
        border: 1px solid #98ca67
    }
    .prodect_childer_huaxue_video_title a:hover {
        background-color: #ebad5c;
        border: 1px solid #ebad5c
    }
}
@media screen and (max-width:768px) {
    .prodect_childer_video::before {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        content: "";
        background-color: rgba(3,15,39,0.3);
        z-index: 10 !important
    }
    .tip {
        text-align: center;
        margin-top: 60px;
    }
    .nopadding {
        padding-top: 0 !important;
    }
    .prodect_childer_video_title {
        position: absolute;
        left: 50%;
        top: 50%;
        transform: translate(-50%, -50%);
        z-index: 100;
        width: 100%;
    }
    .prodect_childer_video_title h2 {
        font-size: 60px;
        line-height: 80px;
        color: #fff;
        text-align: center;
        letter-spacing:2px;
    }
    .prodect_childer_video_title a {
        padding: 8px 20px;
        display: inline-block;
        margin-left: 5px;
        margin-right: 5px;
        background-color: transparent;
        color: #fff;
        font-size: 16px;
        border-radius: 4px;
        text-align: center;
        border: 1px solid #fff;
    }
    .prodect_childer_video_title a i{
        width:18px;
        height:18px;
        float:left;
        margin-top: -2px;
        margin-right: 5px;
    }
    .prodect_childer_video_title a i img{
        width:100%;
        height:100%;
    }
}
.top-bar2 {
    background: rgba(3,15,39,0) !important;
    border-bottom: unset !important;
    box-shadow: unset !important;
}
.top-bar2 .main-menu li > a {
    color: #fff !important;
}
.top-bar2 .main-menu li a:hover {
    color: #EC6F28 !important;
}
.container {
    margin-right: auto;
    margin-left: auto;
}