#section4{width:100%;background:#f0f0f0}
#section4 .wrapper{display:block;position:relative;width:1070px;margin:0 auto}
#section4 .wrapper .contents{margin-top:40px;font-size:15px;color:#515151;line-height:23px}
#section4 .wrapper > img{position:absolute;top:0;right:0;opacity:0}

#section4 .arrow{position:absolute;bottom:45px;left:50%;transform:translateX(-50%);font-size:14px;color:#123c7b;letter-spacing:-0.5px;text-align:center;z-index:99}
#section4 .arrow i{position:absolute;left:50%;transform:translateX(-50%);arr 1.6s infinite linear;-ms-animation:arr 1.6s infinite linear;animation:arr 1.6s infinite linear;font-size:20px}
@-webkit-keyframes arr{from{top:20px}30%{top:25px}60%{top:20px}100%{top:25px}}
@-ms-keyframes arr{from{top:20px}30%{top:25px}60%{top:20px}100%{top:25px}}
@keyframes arr{from{top:20px}30%{top:25px}60%{top:20px}100%{top:25px}}
#section4 .mouse{position:absolute;behavior: url(/js/PIE.htc);bottom:60px;left:50%;transform:translateX(-50%);box-sizing:border-box;width:30px;height:45px;border-radius:20px;border:2px solid #123c7b;z-index:1000}
#section4 .mouse .mouse_wheel{position:absolute;top:4px;left:50%;margin-left:-2px;box-sizing:border-box;width:3px;height:7px;border-radius:10px;background:#123c7b;z-index:1000}