img{
   vertical-align:  -webkit-baseline-middle;
}

ul,li{
    list-style: none;
    padding: 0;
    margin: 0;
}

#MB_single {
    width: 100%;
    font-family: '微軟正黑體', 'Microsoft JhengHei', Arial, helvetica, sans-serif;
    font-size: 75%;
    color: #fff;
    margin: 0 auto;
    padding: 0;
   background-color: #000;
}


#MB_single .table{
    width: 100%;
    display: table;
    border-collapse: collapse;
    border-spacing: 0;
    margin: 0;
}

#MB_single .tr{
    display: table-row;
}

#MB_single .td{
    display: table-cell;
}

#MB_single .layout-content {
    width: 100%;
    max-width: 1420px;
    margin: 0 auto;
}


/**/
#NAV #XX{
    display:none;
}


#NAV{
    width:100%;
    height:100%;
    position:fixed;
    top:0;
    bottom:0;
    left:0;
    right:0;
    margin:auto;     
    background: rgba(0,0,0,.25);
    display: none;
}


#NAV #XX{
    display:block;
    width:30px;
    height:30px;
    background-color:#F00;
    color:#FFF;
    box-shadow:1px 1px 15px #000;
    border-radius:50%;
    text-align:center;
    line-height:30px;
    position:absolute;
    right:-10px;
    top:-10px;
}  

 #NAV .nav_body {
    width: 1000px;
    height: auto;
    position:absolute; 
    top:0;
    bottom:0;
    left:0;
    right:0;
    margin:auto;
    background: url(https://asset.msi.com/event/mb/2017/tw_MB_single/images/popup_bg.jpg) 50% 0 no-repeat;
    text-align: center;
}

.nav_content{
    width: 100%;
    max-width: 660px;
    margin: 0 auto;
    padding-top: 50px;
}


.nav_content p{
    color: #fff;
    font-size: 20px;
    text-align: center;
    line-height: 1.6;
    margin-top: 10px;
}


.nav_content li{
    width: 100%;
    height:198px;
   padding: 50px 15px 0 45px;
}


.nav_content li:nth-child(1){
    background: url(https://asset.msi.com/event/mb/2017/tw_MB_single/images/boder_01.png) top left no-repeat;
}

.nav_content li:nth-child(2){
    background: url(https://asset.msi.com/event/mb/2017/tw_MB_single/images/boder_02.png) top left no-repeat;
}

.nav_content li:nth-child(3){
    background: url(https://asset.msi.com/event/mb/2017/tw_MB_single/images/boder_03.png) top left no-repeat;
}

.nav_content li:nth-child(4){
    background: url(https://asset.msi.com/event/mb/2017/tw_MB_single/images/boder_04.png) top left no-repeat;
}

#NAV a.btn-txt{
    color: #fff;
    background-color: transparent;

}

#NAV a.btn-txt:hover{
    color: #fff;
    background-color: #f01;
    text-decoration: none;
}

#NAV .org_color{
    color: #ffbc21;
}

#NAV .btn-link{
    display: inline-block;
    text-align: center;
    margin: 0px auto;
}

#BTN{
    cursor: pointer;
}