body {
    background-color: #cfd8dc
}

body .ms-site-container {
    max-width: 1200px;
    margin: 0 auto;
    box-shadow: 0 6px 10px 0 rgba(0,0,0,.14),0 1px 18px 0 rgba(0,0,0,.12),0 3px 5px -1px rgba(0,0,0,.2);
    position: relative
}

/*大電腦*/
@media(min-width: 1600px) {
   
   body .ms-site-container {
      max-width: 1500px;
      margin: 0 auto;
      box-shadow: 0 6px 10px 0 rgba(0,0,0,.14),0 1px 18px 0 rgba(0,0,0,.12),0 3px 5px -1px rgba(0,0,0,.2);
      position: relative
   }
   
}   

/*電腦*/
@media(min-width: 1390px) and (max-width:1599px) {   
   
   body .ms-site-container {
      max-width: 1280px;
      margin: 0 auto;
      box-shadow: 0 6px 10px 0 rgba(0,0,0,.14),0 1px 18px 0 rgba(0,0,0,.12),0 3px 5px -1px rgba(0,0,0,.2);
      position: relative
   }
   
}