body { font-size: 120%; }
.bottom_btn { background-color: silver; background-image: url(../web_img/bac-color.gif); width: 980px; height: 450px; margin: 0 auto; padding-top: 10px; padding-bottom: 10px; }
h1,h2,h3,h4,h5 { line-height: 150%; }