#div_intersect {
            position: relative;
            width: 100%;
            z-index: 666;
            display: none;
            background-repeat: repeat;
            background-size: 100%;
            overflow: hidden;
        }

        #div_is_inner {
            position: absolute;
            top: 0;
            right: 0;
            left: 0;
            bottom: 0;
            width: 100%;
            min-height: 160px;
            background: rgba(255, 255, 255, .85);
        }



        #canvas_is {
            position: absolute;
            display: block;
            margin: 0 auto;
        }



        .div_is_typed {
            width: 500px;
            height: 960px;
            position: absolute;
            top: 0;
            right: 0;
            left: 0;
            bottom: 0;
            z-index: 668;
            -webkit-overflow-scrolling: touch;
            padding: 10%;
            font-size: 1.2em;
            /* overflow: scroll; */
        }

        #div_is_img {
            width: 100%;
            max-height: 320px;
            object-fit: cover;
            display: none;
            overflow: hidden;
            margin: 0px 0px 15px 0px;
            background-color: white;
            border: 15px solid white;
            border-radius: 3px;
            display: none;
        }

        #div_is_img img {
            width: 100%;
        }



        .div_is_open_bg {
            width: 500px;
            height: 960px;

            display: block;
            background-color: rgba(255, 255, 255, 0.85);
            position: fixed;
            z-index: 669;
        }

        .div_is_open_btn {
            width: 100px;
            height: 54px;
            margin: 200px auto;
            background-image: url('https://vip.123pan.cn/1822310731/webSource/silencelab/img/rmt_open_letter.jpg');
            border-radius: 3px;
            overflow: hidden;
            -moz-box-shadow: 0px 0px 10px #999;
            -webkit-box-shadow: 0px 0px 10px #999;
            box-shadow: 0px 0px 10px #999;
            animation-name: heartbeat;
            animation-duration: 2000ms;
            animation-timing-function: cubic-bezier(0, 0, 0, 1.74);
            animation-delay: 500ms;
            animation-iteration-count: infinite;
            animation-play-state: running;
        }

        @keyframes heartbeat {
            0% {
                transform: scale(0.95);
            }

            100% {
                transform: scale(0.95);
            }

            50% {
                transform: scale(1);
            }
        }