.nav-pic {
    width: 100%;
    height: 500px;
    background-image: url(../../img/xianguan-yewu.jpg);
    background-position: center;
    background-repeat:  no-repeat;
    background-size: cover;
}
.example {
    padding: 100px 0;
    box-sizing: border-box;
}
.example .example-title {
    position: relative;
    height: 80px;
    text-align: center;
    font-weight: bold;
    font-size: 28px;
}
.example .example-title span {
    color: #9A0101;
}
.example-title {
    position: absolute;
    background-repeat: no-repeat;
    background-position: center 50px;
    background-image: url('../../imgs/exple.png');
}
.example ul {
    margin: 50px auto;
    display: flex;
    justify-content: space-between;
}
.example ul li {
    width: 250px;
    /* border: 1px solid #999; */
}
.example ul li img {
    display: block;
    width: 250px;
    height: 380px;
}
.example-name {
    text-align: center;
    font-size: 16px;
    color: #333;
}
.example-content {
    margin: 10px 0;
}
.example-txt {
    margin-top: 10px;
    text-align: center;
    font-size: 12px;
    color: #999999;
}