.tl {
            font: 14px/1.8 "微软雅黑", "//5b8b//4f53", Arial, sans-serif;
        }
        
        .tl .on {
            width: 31%;
            padding: 8px 20px 0;
            background: #eeeeee;
            border-radius: 8px;
            margin-left: 3.5%;
            float: left;
            border: 1px solid #eeeeee;
            box-sizing: border-box;
        }
        
        .tl .on:first-child {
            margin-left: 0;
        }
        
        .tl h3 {
            font-size: 18px;
            line-height: 25px;
            text-align: center;
            border-bottom: 1px solid #c3c3c3;
            padding-bottom: 10px;
            font-weight: normal
        }
        
        .tl p img {
            display: block;
            margin: 0 auto 20px;
            max-width: 100%;
        }
        
        .tl .on:hover,
        .tl .on:hover h3 {
            background: #ff6f00;
            color: #fff;
            border-bottom-color: #fff
        }
        
        .tl .on:hover h3 {
            border-bottom-color: #fff
        }
        
        @media (max-width: 640px) {
            .tl .on {
                width: 100%;
                margin-left: 0;
            }
        }