.content {
    width: 100%;
    max-width: 1920px;
    margin: 0 auto;
}

.top {
    width: 100%;
    height: 406px;
}

.top img {
    width: 100%;
    height: 100%;
}

.main {
    width: 100%;
    height: 600px;
    position: relative;
    background: url(../images/背景.png) no-repeat center center;
}

.main .nav {
    width: 150px;
    height: 600px;
    text-align: center;
    float: left;
    position: absolute;
    top: 0;
    left: 0;
    background-color: rgba(0, 0, 0, .5);
    z-index: 999;
}

.main .nav a {
    display: block;
    height: 80px;
    line-height: 80px;
    font-size: 18px;
    color: #fff;
    margin: 30px 0;
}

.main .nav a:nth-child(4) {
    border-bottom: 5px solid #9D7C4E;
}

.main .nav a:hover {
    border-bottom: 5px solid #9D7C4E;
    text-decoration: none;
}

.main .text_box {
    width: 100%;
    height: 600px;
    float: right;
    padding-left: 180px;
    position: relative;
    text-align: center;
    background-color: rgba(255, 255, 255, .2);
}

.main .text_box .text_box_1 {
    text-align: left;
    padding-left: 200px;
    margin: 70px 0;
}

.main .text_box .text_box_2 {
    width: 100%;
    height: 260px;
}

.main .text_box .text_box_1 div {
    margin: 15px 0;
    color: #fff;
}

.main .text_box .text_box_1 img {
    width: 25px;
    height: 25px;
}

.main .text_box .text_box_2 img:nth-child(1) {
    width: 40%;
    height: 100%;
}

.main .text_box .text_box_2 img:nth-child(2) {
    width: 19%;
    height: 100%;
}

.main .text_box .text_box_2 img:nth-child(3) {
    width: 19%;
    height: 100%;
}

.main .text_box .text_box_2 img:nth-child(4) {
    width: 19%;
    height: 100%;
}

.bottom {
    width: 100%;
    height: 80px;
}

.bottom img {
    width: 100%;
    height: 100%;
}