body{
    margin: 0;
    padding: 0;
    background-color: #fbfbfb;
}

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

#nav-bgc{
    width: 100%;
    /* position: fixed; */
    z-index: 9999;
    background-color: rgba(255, 255, 255, 0.5);
}

.nav{
    min-width: 960px;
    max-width: 1920px;
    width: 100%;
    margin: 0 auto;       
    height: 110px;
}

.nav #logo{
    width: 150px;
    position: relative;
    top: 35px;
    left: 9.3%;
}

.nav>ul{
    float: right;
    position: relative;
    top: 25px;
    right: 3.1%;
    width: 745px;
}

.nav>ul li{
    padding: 0 15px;
    display: inline-block;
    vertical-align: top;    
}

.nav>ul li a{
    color: #333;    
}

.nav>ul li a:hover{
    font-weight: bold;
}

#login-box{
    width: 170px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    top: -5px;
}

#login-button{
    width: 100px;
    padding: 7px 10px;
    border: solid 1px #333;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50px;
}
#login-button:hover{
    cursor: pointer;
    background-color: rgba(255, 255, 255, 0.5);
    border-color: rgba(255, 255, 255, 0.5);
    color: #333;
}

.islogin #login-button{
    visibility: hidden; 
}

.nav-login-img{
    width: 30px;
    margin-left: 30px;
}

.nav-login-img:hover{
    cursor: pointer;
    width: 32px;
    margin-left: 28px;
}

#sub-menu{
    margin: 0;
    padding: 0;
    padding-top: 15px;
    padding-bottom: 15px;
    width: 150px;
    position: absolute;
    top: 80px;
    right: 45px;
    background-color: #fff;
    border-radius: 20px;
    visibility: hidden;
    z-index: 999;
}

#sub-menu ul li{
    margin: 0;
    padding: 0;
    margin-top: 12px;
    margin-bottom: 12px;
}

#exit{
    color: #ff433e;
}

#all-box{
    min-width: 960px;
    max-width: 1920px;
}

#qna-box{
    width: 65%;
    margin: 0 auto;
    display: flex;
    flex-flow: row nowrap;
}
#qna-nav{
    width: 15%;
    border-right: 1px solid #e5e5e5;
}
#qna-box ul{
    list-style: none;
}
#qna-box ul li{
    min-height: 3vw;
    border-bottom: 1px solid #e5e5e5;
    color: #999;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 0.9vw;
}
#qna-nav ul li:hover{
    color: #000 !important;
    font-weight: bold;
}
#qna-content-box{
    width: 85%;
    min-height: 60vh;
    padding-bottom: 5vh;
}

#qna-content-box ul li{
    color: #333;
    justify-content: start;
}

.qna-content ul li{
    flex-flow: column;
}
.qna-content-single-title{
    width: 100%;
    height: 3vw;
    display: flex;
    align-items: center;
    position: relative;
    user-select: none;
    cursor: pointer;
}
.arrow{
    position: absolute;
    right: 3%;
    bottom: 40%;
}
.qna-content-single-content{
    display: none;
    width: 100%;
    padding-bottom: 1vw;
}
.qna-content-single-content-text{
    display: inline-block;
    color: #999;
    width: 100%;
    margin: 0.2vw 0;
}
.qna-link{
    color: #0077ed;
}

#device-content,#bluetooth-content,#compatibility-content,#other-content{
    display: none;
}

.RefundAndReturnTheProductBtn{
    color: #0077ed;
    text-decoration: none;
}


/* 隐藏弹窗 */
.modal {
    display: none;
    position: fixed;
    z-index: 1;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0,0,0,0.4);
}

/* 弹窗内容样式 */
.modal-content {
    background-color: #fefefe;
    margin: 8% auto;
    padding: 20px;
    border: 1px solid #888;
    width: 80%;
}

@media (min-width: 1920px){
    #qna-box ul li{
        min-height: 60px;
        font-size: 18px;
    }
    .qna-content-single-title{
        height: 60px;
    }
    .qna-content-single-content{
        padding-bottom: 20px;
    }
    .qna-content-single-content-text{
        margin: 4px 0;
    }
}

@media (max-width: 960px){
    #qna-box ul li{
        min-height: 30px;
        font-size: 9px;
    }
    .qna-content-single-title{
        height: 30px;
    }
    .qna-content-single-content{
        padding-bottom: 10px;
    }
    .qna-content-single-content-text{
        margin: 2px 0;
    }   
}