*{
    padding: 0;
    margin: 0;
}
.clear{
    clear: both;
}
.img-box{
    width:40%;
    height:200px;
    float: left;
    overflow-x: scroll;
    border-right: 1px solid #333;
    border-bottom: 1px solid #333333;
    box-sizing: border-box;
    position: relative;
    z-index: 20;
    background-color: #fff;
}
/* 美化整个滚动条 */
::-webkit-scrollbar {
    width: 8px; /* 设置滚动条的宽度 */
    height: 8px;
    background-color: #f9f9f9; /* 滚动条的背景颜色 */
}

/* 美化滚动条轨道 */
::-webkit-scrollbar-track {
    background: #e1e1e1; /* 轨道的背景颜色 */
    border-radius: 10px; /* 轨道的圆角 */
}

/* 美化滚动条的滑块 */
::-webkit-scrollbar-thumb {
    background-color: #3C8FFF; /* 滑块的背景颜色 */
    border-radius: 10px; /* 滑块的圆角 */
}

/* 当滑块悬停或活动时的样式 */
::-webkit-scrollbar-thumb:hover {
    background: #a8a8a8; /* 悬停或活动状态下滑块的背景颜色 */
}
.subject-img{
    width: 200px;
    height: 150px;
    margin-top: 20px;
    margin-left: 20px;
}
.video-box{
    width: 20%;
    border-bottom: 1px solid #333333;
    float: left;
    height: 200px;
    box-sizing: border-box;
    position: relative;
    z-index: 20;
    background: #fff;
}
.canvas-box{
    width: 100%;
    position: relative;
    overflow: hidden;

}
.canvas-img{
    position: absolute;
    /* width: 100%; */
    height: 100%;
    top: 0;
    /* left:0;
    right: 0;
    bottom: 0;
    margin: auto; */
    display: none;
}
#canvas{
    position: fixed;
    top: 0;
    left: 0;
    z-index: 3;
    box-sizing: border-box;
}
.more{
    width: 32px;
    height: 6px;
    margin: 24px auto 0;
    display: block;
    background: url('../images/more.png') 0 0 no-repeat;
}
.student-info{
    font-size: 14px;
    position: fixed;
    bottom: 0;
    left: 50px;
    z-index: 999;
    color: #999;
}
.color-box{
    float: left;
    margin-left: 13px;
}













.canvas{
    position: relative;
    margin:0 auto;
    left: 0;
    top: 0;
    right: 0;
    bottom: 0;
}
#controller{
    z-index: 20;
    width: 100px;
    position: fixed;
    right:5px;
    top: 205px;
    background: #E5E5E5;
    overflow: hidden;
    border-radius: 100px;
    padding-bottom: 20px;
}
.op_btn{
    width:30px;
    height: 30px;
    margin-top: 13px;
    cursor:pointer;
    font-family: Microsoft Yahei, Arial;

}
.op_btn img{
    width:30px;
    height: 30px;
    margin: 0 auto 0;
    display: block;
    
}
.lineWidth{
    margin: 25px auto 0;
    cursor:pointer;
    background: #A0A0A0;
    border-radius: 50%;
}
.lineWidthCu{
    width: 20px;
    height: 20px;

}
.lineWidthZhong{
    width: 16px;
    height: 16px;
}
.lineWidthXi{
    width: 10px;
    height: 10px;
}
.clearfix{
    clear:both;
}

.color_btn{
    margin: 13px auto 0;
    border:5px solid white;
    width:20px;
    height:20px;
    border-radius: 5px 5px;
    cursor:pointer;
}
.color_btn:hover{
    border: 5px solid violet;
}
.color_btn_selected{
    border: 5px solid blueviolet;
}
#black_btn{
    background-color: black;
}
#blue_btn{
    background-color: blue;
}
#green_btn{
    background-color: green;
}
#red_btn{
    background-color: red;
}
#orange_btn{
    background-color: orange;
}
#yellow_btn{
    background-color: yellow;
}
.textTrue{
    background: #A0A0A0;
}
.textTrue1{
    background: #000;
}
.inputBox{
    position: absolute;
    resize: none; /* 禁止用户调整textarea的大小 */
    overflow: hidden; /* 隐藏额外内容 */
    min-height: 50px; /* 设置最小高度 */
    z-index: 20;
    background: transparent;
    font-size: 26px;
    width: 500px;
    border: 0;
}
.video_miao{
    width: 100%;
    height: 100%;
}
.canvasImg-mask{
    display: none;
    /* background: rgba(0,0,0,0.5); */
    position: absolute;
    z-index: 4;

    cursor: move;
}




#local-video, #remote-video {
    width: 400px;
    height: 300px;
    border: 1px solid #dfdfdf;
}

#local-video {
    position: relative;
    margin: 0 auto;
    display: block;
}

#remote-video {
    display: flex;
    margin: auto;
    position: relative !important;
}
.popup-box{
    width: 300px;
    padding-top: 30px;
    height: 100px;
    text-align: center;
    background: #fff;
    border: 1px solid #000;
    border-radius: 10px;
    position: fixed;
    top: 0;
    right: 0;
    left: 0;
    bottom: 0;
    margin: auto;

}
.mask-box{
    width: 100%;
    height: 100%;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 100;
    display: none;
}
.mask-box1{
    width: 100%;
    height: 100%;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 100;
    display: none;
}
.start-box{
    width: 100%;
    height: 100%;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 100;
    display: none;
}
.start-box .exit-btn{
    width: 240px;
    line-height: 30px;
    text-align: center;
    border: 1px solid #000;
    border-radius: 10px;
    margin-left: 30px;
    margin-top: 30px;
    cursor: pointer;
}
.exit-btn{
    width: 100px;
    line-height: 30px;
    text-align: center;
    border: 1px solid #000;
    border-radius: 10px;
    margin-left: 30px;
    margin-top: 30px;
    cursor: pointer;
    float: left;
}
.countdown{
    color: red;
    font-weight: bold;
}
.more{
    cursor: pointer;
}
.hangup{
    position: fixed;
    left: 0;
    bottom: 0;
    width: 50px;
    height: 50px;
    z-index: 99;
}

.log-box{
    width: 300px;
    height: 300px;
    border: 1px solid #000;
    overflow: scroll;
    position: relative;
    z-index: 5;
}