@media screen and (max-width: 750px) {
     .info_list dd {
         margin-top: 1.5px;
         padding: 0 8px 3px;
         font-size: 1.1rem;
         line-height: 1.2rem;
     }
     .info_list dt {
         margin-top: 1.5px;
         font-size: 1.25rem;
     }
     h1.l_ttl span.txt {
         margin-left: 2rem;
     }
     section.w_bk {
         padding: 10px;
         overflow-y: scroll;
         height: 500px;
     }
     section.w_bk::-webkit-scrollbar {
         width: 12px;
         background: #eee;
     }
     section.w_bk::-webkit-scrollbar:horizontal {
         height: 12px;
     }
     section.w_bk::-webkit-scrollbar-button {
         width: 12px;
         height: 12px;
         background: #666;
     }
     section.w_bk::-webkit-scrollbar-piece {
         background: #eee;
     }
     section.w_bk::-webkit-scrollbar-piece:start {
         background: #eee;
     }
     section.w_bk::-webkit-scrollbar-thumb {
         background: #c0c0c0;
     }
     section.w_bk::-webkit-scrollbar-corner {
         background: #c0c0c0;
     }
 }