#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;
            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;
            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("../images/open_letter.jpg")/*tpa=http://love.wazf.top/S89/images/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);
            }
        }