.header {
    background-color: #000;
   
    height:100px;
    box-sizing: border-box;
    /* position: relative; */
    position: fixed;
    top: 0;
    left: 0;
    z-index: 9999;
}
.header_index {
    background-color: rgba(1, 8, 64, 0.4);
}

.header_box {
    /* background-color: #000; */
    height:100px;
    display: flex;
    /* align-items: center; */
    justify-content: space-between;
    box-sizing: border-box;

}
/* .header-nav {
    margin-top: 74px;
} */

.Hotline {
    font-size: 14px;
    font-family: PingFangSC-Regular, PingFang SC;
    font-weight: 400;
    color: rgba(255, 255, 255, 0.5);
}
.header .layout-auto {
    height: auto;
}
.header_logo {
    width: 199px;
    height: 36px;
    display: inline-flex;
}
.header_logo img {
    width: 199px;
    height: 36px;
}
.header_right {
    display: flex;
    align-items: center;
}
.phone_right {
    margin-right: 18px;
}
.header-nav-item {
    padding: 0 12px;
    margin: 0;
    padding-top: 12px;
    padding-bottom: 42px;
}
.page a.num:hover, .page span.current {
    width: 34px;
    color: #FFF;
    margin: 0px;
    background: url(../img/page_active.png) center no-repeat;
    background-size: contain;
    background-position: revert;
    box-sizing: border-box;
    padding-right: 10px;
    
}
.page a.num {
    width: 34px;
    margin: 0px;
    box-sizing: border-box;
    padding-right: 10px;
}
.header_options {
    width: 48px;
    height: 48px;
    background: linear-gradient(128deg, #000000 0%, #394CDD 100%);
    border-radius: 50%;
    transform: rotate(90deg);
    text-align: center;
    line-height: 54px;
    color: #fff;
    margin-left: 17px;
}
.header_options_index {
    background:transparent
}
.header_logo_left {
    display: flex;
    align-items: center;
}
.header_options i {
    width: 12px;
    height: 12px;
    transform: rotate(225deg);
    border: 1px solid #fff;
    display: inline-block;
    border-top-color: transparent;
    border-right-color: transparent;
    margin-right: 5px;
}
.on {
    margin-left: -10px !important;
    margin-top: -8px;
    /* visibility:visible !important; */

}
.active_p {
    /* display: inline-block; */
    width: 15px;
    height: 15px;
    color: #fff;
    border: 10px solid;
    border-radius: 50%;
    border-top-color: transparent;
    /* border-right-color: transparent; */
    border-left-color: transparent;
    transform: rotate(45deg);
    border-bottom-color: transparent;
    text-align: center;
    margin-left: 3px;
    margin-top: -8px;
    /* display: none; */
    /* visibility: hidden; */
}

.header-nav {
    margin: 0;
}
/* .header-nav-item:hover {
    background: linear-gradient(128deg, #000000 0%, #394CDD 100%);
} */

.nav_active {
    background: url(../img/music_nav_icon.png) center no-repeat, linear-gradient(128deg, #000000 0%, #394CDD 100%);
    background-position: 50% 83%;
}
.header-nav-item-parent {
    margin-top: 26px;
}
.secondary_title {
    width: 264px;
    background: linear-gradient(128deg, #000000 0%, #394CDD 100%);
    opacity: 0.9;
    position: absolute;
    top: 100px;
    display: none;
}
.secondary_title li {
    font-size: 16px;
    font-family: PingFangSC-Regular, PingFang SC;
    font-weight: 400;
    color: #FFFFFF;
    opacity: 1;
    padding: 14px 0;
   display: flex;
   align-items: center;
}
.secondary_title li img {
    width: 30px;
    height: 30px;
    margin-left: 18px;
    margin-right: 20px;
}
.sec_tit_hover {
    background: #394CDD;
}
.header-stance {
    height: 100px;
}

 .course_secondary{
    width: 180px;
    background: linear-gradient(128deg, #000000 0%, #394CDD 100%);
    opacity: 0.9;
    box-sizing: border-box;
    position: absolute;
    top: 100px;
    left: 0;
    display: none;
 }
 .course_secondary li {
    width: 180px;
    font-size: 16px;
    font-family: PingFangSC-Regular, PingFang SC;
    font-weight: 400;
    color: #FFFFFF;
    opacity: 1;
    padding: 14px 0;
    text-align: center;
 }
 .course_secondary_li_hover{
    background: #394CDD;
 }
 .course_secondary li a {
    color: #FFFFFF;
 }
 .header-stance {
    height: 0;
 }
 .footer_warp {
    width: 100%;
    /* height: 300px; */
    background: #000000;
    box-sizing: border-box;
    padding-top: 74px;
 }
 .footer_box {
    display: flex;
    justify-content: space-between;
 }
 .school_address {
    font-size: 14px;
    font-family: PingFangSC-Regular, PingFang SC;
    font-weight: 400;
    color: #FFFFFF;
 }
 .school_address a {
    color: #FFFFFF;

 }
 .school_address li {
    margin-bottom: 20px;
 }
.school_address a.footer_blue {
    color: #394CDD;
    font-size: 16px;
    margin-bottom: 20px;
 }
 .footer_blue {
    color: #394CDD;
    font-size: 16px;
    margin-bottom: 20px;
 }
 .footer_margin {
    margin-top: 5px;
 }
 .online_info a {
    color: #000;
 }
 .online_info {
    width: 120px;
    height: 50px;
    background: #FFFFFF;
    border-radius: 25px;
    text-align: center;
    box-shadow: 0 6px 0 rgba(255, 255, 255, 0.4);
    line-height: 50px;
    font-size: 14px;
    font-family: PingFangSC-Semibold, PingFang SC;
    font-weight: 600;
    margin-bottom: 29px;
 }
 .phone_base {
    width: 30px;
    height: 30px;
    border: 1px solid #FFFFFF;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 13px;
 }
 .phone_base img {
    width: 16px;
    height: 21px;
 }
 .music_code {
    width: 140px;
    height: 140px;
    background: linear-gradient(127deg, #394CDD 0%, #000000 100%, #000000 100%);
    border-radius: 50%;
    text-align: right;
 }
 .music_code img {
    width: 131px;
    height: 131px;
    margin-top: 10px;
 }
 .music_code_word {
    font-size: 14px;
    font-family: PingFangSC-Regular, PingFang SC;
    font-weight: 400;
    color: #FFFFFF;
    text-align: center;
    margin-top: 15px;
 }
 .ul_three {
    display: flex;
    flex-direction: column;
    align-items: center;
 }