body { margin: 0; padding: 0; }
a { text-decoration: none; }
img { border: 0; }
em { font-style: normal; font-weight: normal; }
body { min-width: 980px; }
.header { width: 100%; max-width: 1920px; margin: 0 auto; position: relative;}

.header { height: 400px; }
.gg { width: 100%; height: 400px; position: relative; z-index: 1; overflow: hidden; margin: 0 auto;  }

.ggs { width: 200%; height: 400px; left: -50%; top: 0; position: absolute; }
.ggBox { width: 1920px; height: 400px; margin: 0 auto; background:#fff;}
    .ggBox a { display: block; width: 1920px; height: 400px; position: absolute; z-index: 1; }
    .ggBox img { display: block; max-width:1920px; margin:0 auto;}
.ggb { position: absolute; width: 100%; left: 0; bottom: 10px; height: 30px; z-index: 4;  }
.ggBtns { width: 1000px; height: 30px; margin: 0 auto;}
    .ggBtns a { float: left; display: block; width: 240px; height: 30px; text-align: center; padding-top: 10px; color: #ccc; font-size: 13px; line-height: 30px; background-position: 0 10px; position: relative; top: -10px; outline: none; background-repeat: no-repeat; cursor: pointer; }
        .ggBtns a em { display: block; width: 210px; height: 30px; margin: 0 auto; overflow: hidden;  }
        .ggBtns a:hover { color: #fff; }
        .ggBtns a:focus { outline: none; }
        .ggBtns a.ggOn { color: #fff; background-position: 0 0; }
    .ggBtns a { background-image: url(../images/main.png); }
a.ggOn { background-image: url(../images/gg.png); }