.g_slide { width: 1440px; height: 460px; position: relative; margin: 0px auto 0px auto; overflow: hidden; }
.g_slide .item { display: none; position: absolute; left: 0; top: 0; }
.switch_main { width: 100%; position: relative; }
.g_slide .switch_nav { width: 100%; position: absolute; right: 0; bottom: 10px; z-index: 11; text-align: center; }
.g_slide .switch_nav_item { display: inline-block; margin: 0 10px 0 0; width: 13px; height: 13px; line-height: 200px; overflow: hidden; font-size: 0; border-radius: 100%; background: #b7b7b7; text-align: center; font-size: 18px; color: #fff; }
.g_slide .switch_nav_item:hover { text-decoration: none; }
.g_slide .prev, .g_slide .next { width: 18px; height: 30px;  position: absolute; top: 50%; z-index: 10; margin-top: -15px; overflow: hidden; background: url(./slide.png) no-repeat; transition: margin-left .3s ease, margin-right .3s ease; }
.g_slide .prev { left: -18px; _left: 10px; }
.g_slide .next { right: -18px; background-position: -19px 0; }
.g_slide .prev:hover { background-position: 0 -70px; }
.g_slide .next:hover { background-position: -19px -70px; }
.g_slide:hover .prev { margin-left: 28px; }
.g_slide:hover .next { margin-right: 28px; }