* {
    margin: 0;
    padding: 0;
}
li {
    list-style: none outside none;
}
body {
    font-family: "宋体";
    padding: 0;
}
.silder-box {
    position: relative;
}
.silder {
    margin: 0 auto 0;
    margin-left: 48px;
    margin-right: 20px;
}
.silder li {
    position: relative;
}
.silder li .txt {
    height: 55px;
    line-height: 24px;
    text-align: left;
    color: #888888;
    padding-top: 5px;
    padding-bottom: 5px;
    text-decoration: none;
    font-size: 14px;
    font-family: Microsoft YaHei;
}

.silder li span {
    display: block;
    width: 0;
    height: 0;
    border: 10px solid rgba(0, 0, 0, 0);
    border-bottom: 10px solid rgba(0, 0, 0, 0.2);
    z-index: 99999;
    position: absolute;
    top: 100px;
    left: 45px;
}
.silder-button {
    top: 118px;
    width: 20px;
    height: 54px;
    position: absolute;
    cursor: pointer;
}
.silder-button.btl {
    left: 0;
    background: url(../images/lefts.png) no-repeat center;
    background-size: 20px;
}
.silder-button.btr {
    right: 0;
    background: url(../images/rights.png) no-repeat center;
    background-size: 20px;
}