/* 右侧列的样式 */
 
/* @import url('https://gfont.los.mcdu.xyz/css?family=Roboto'); 
*/
 @font-face {
     
     /*font-family: "仿宋_GB2312";*/
     /*src: url("https://api.cafsim.cn/static/fonts/fs");
     
    
     font-family: "Roboto";
     */
     /*
     src: url("https://gfont.los.mcdu.xyz/css?family=Roboto");
     */
     
 }
 .square {
    position: relative;
    width: 13%;
    height: 0;
    padding-top: 100%;
    background-color: red;
}

.square::before {
    content: "";
    display: block;
    padding-top: inherit;
}
 img {
  width: 50%;
}


 body {
     /*font-family: "仿宋_GB2312", Arial, sans-serif;*/
 }
 
 .card {
     margin-top: 3px;
     box-shadow: 0px 2px 4px rgba(0, 0, 0, 0.3);
     border-radius: 4px;
 }
.card-header {
  
    padding: 0.8rem .2rem;
    margin-bottom: 0;
    background-color: rgba(0,0,0,.03);
    border-bottom: 0px solid rgba(0,0,0,.125);
}
.shadow-hover:hover {
            box-shadow: 0 .125rem .25rem rgba(0,0,0,.075)!important
}
 
 .list_o {
     max-height: 350px;
     overflow-y: auto;
 }
 
 .question-block {
     margin-top: .67em;
     overflow-y: scroll;
 }
 
 .single-block {
     font-size: 1rem !important;
     padding: 0 !important;
     width: 18%;
     margin-right: 2%;
     margin-bottom: 1%;
 }
 
 .onanswer {
     color: #fff !important;
     background-color: #19B2CA !important;
     border-color: #19B2CA;
     box-shadow: inset 0 0 5px rgb(114 114 114 / 80%);
 }
 
 .options {
     display: flex;
     flex-direction: column;
     margin-top: 1.1em;
 }
 .choosenav{
     display: flex;
    flex-direction: column;
    margin: 0.2em;
    margin-right: -0.18em;
    margin-top: 1.1em;
 }
 .option {
     display: flex;
     flex-direction: row;
     padding: .5em;
     margin-top: .7em;
     margin: .2em;
     border: 1px solid #999;
     border-radius: 3px;
     width: 100%;
 }
 
 .title-img-single {
     width: 60px;
     margin-right: .5em;
 }
 
 img {
     vertical-align: middle;
     border-style: none;
 }
 
 .correct {
     color: #fff !important;
     background-color: #2DBD4E !important;
     border-color: #2DBD4E !important;
 }
 
 .wrong {
     color: #212529 !important;
     background-color: #FFD145 !important;
     border-color: #FFD145 !important;
 }
 
 .marked {
     background-color: #E53748 !important;
     border-color: #E53748 !important;
     color: white !important;
 }
 
 .rc {
     /*要设置滚动条的容器样式*/
 }
 
 .rc::-webkit-scrollbar {
     /*滚动条整体样式*/
     width: 5px;
     /*高宽分别对应横竖滚动条的尺寸*/
     height: 5px;
 }
 
 .rc::-webkit-scrollbar-thumb {
     /*滚动条里面小方块*/
     border-radius: 10px;
     -webkit-box-shadow: inset 0 0 5px rgba(0, 0, 0, 0.2);
     background: #535353;
 }
 
 .rc::-webkit-scrollbar-track {
     /*滚动条里面轨道*/
     -webkit-box-shadow: inset 0 0 5px rgba(0, 0, 0, 0.2);
     border-radius: 10px;
     background: #EDEDED;
 }
 
 /*.title,*/
 .card-header,
 .input-group,
 .btn,
 .modal>* {
     
     font-family: '仿宋_GB2312', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
     
 }
 
 .logo {
     display: flex;
     flex-direction: column;
     text-align: center;
     justify-content: center;
     align-items: center;
     margin: 0 0 0 0;
     width: 100%;
     width: 100vw;
     font-size: 2em;
     line-height: 2em;
     height: 2.2em;
     top: 0;
     z-index: 100;
     background: #56ADFF;
     background: -webkit-linear-gradient(to left, #2a5298, #56ADFF);
     background: linear-gradient(to left, #2a5298, #56ADFF);
     opacity: .95;
     color: white;
 }
 
 
 
 
 
 .btn-outline-danger:hover {
  color: #fff !important; 
  background-color: none !important;
  border-color: #dc3545 !important;
}

.btn-outline-danger:focus, .btn-outline-danger.focus {
  box-shadow: 0 0 0 0.2rem rgba(220, 53, 69, 0.5)!important; 
}