* {
    margin: 0px;
    padding: 0px;
    list-style: none;
}

body {}

#bg {
    position: fixed;
    top: 0px;
    left: 0px;
    width: 100vw;
    height: 100vh;
    background: url(../images/bg.jpg) no-repeat;
    background-position: center;
    background-size: cover;
    z-index: -1;
}

header {
    height: 100px;
    background-color: #fff;
    border-bottom: 4px solid #DD9737;

}

#heard_title {
    width: 1000px;
    margin: 0 auto;
}

#logo {
    position: relative;
    top: 20px;
    float: left;
}

#logo img {
    width: 60px;
    float: left;
    margin-right: 10px;
}

.clear {
    clear: both;
}

.logo_txt {
    float: left;
    font-size: 16px;
    line-height: 30px;
    letter-spacing: 4px;
}

.logo_txt p:nth-child(1) {
    font-weight: bolder;
}

.logo_txt p:nth-child(2) {
    font-size: 12px;
    letter-spacing: 0px;
}

#nav {
    position: relative;
    float: right;
    height: 60px;
    top: 20px;
}

#nav_title {
    float: right;
    font-size: 12px;
    color: #342414;
}

#nav_title a {
    text-decoration: none;
    margin: 0px 5px;
    position: relative;
    color: #6d6d6d;
}

#nav_title a:hover {
    font-weight: bolder;
}

#nav_list {
    font-size: 14px;
    float: right;
    margin-top: 20px;
}

#nav_list a {
    color: #342414;
    font-weight: bolder;
    text-decoration: none;
    margin-left: 30px;
}

#nav_list a:hover {
    color: #DD9737;
    text-decoration: underline;
}

/* 轮播图开始 */
.slider-container {
    width: 1000px;
    margin: 0 auto;
    position: relative;
    overflow: hidden;
    height: 360px;
    margin-top: 40px;
    margin-bottom: 40px;
}

.slider {
    display: flex;
    transition: transform 0.5s ease-in-out;
}

.slide {
    width: 1000px;
}

.slide img {
    width: 1000px;
    height: 360px;
}

.slider-indicators {
    position: relative;
    text-align: center;
    margin-top: -50px;
    z-index: 99;
}

.indicator {
    display: inline-block;
    width: 10px;
    height: 10px;
    background-color: #fff;
    border-radius: 50%;
    margin: 0 5px;
    cursor: pointer;
}

.active {
    background-color: #333;
}

/* 轮播图结束 */
.main_box {
    width: 1000px;
    margin: 0 auto;
    box-sizing: border-box;
    padding: 10px;
    border: 1px solid #ccc;
    background-color: #e8aa54ae;
}

.main_introduce {
    float: left;
    width: 670px;
}

.main_introduce p {
    margin-top: 30px;
    line-height: 26px;
}

.main1 {
    float: right;
    width: 300px;
}

#nav2 {
    width: 1000px;
    margin: 30px auto;
}

.nav2_list {
    float: left;
    margin-left: 20px;
    width: 320px;
    height: 320px;
}

.nav2_list1 {
    margin-left: 0px;

}

.nav2_list1 {
    background: url(../images/lishi.png) no-repeat;
    background-size: 100% 100%;
}

.nav2_list2 {
    background: url(../images/beijing.png) no-repeat;
    background-size: 100% 100%;
}

.nav2_list3 {
    background: url(../images/sheshi.png) no-repeat;
    background-size: 100% 100%;
}

.nav2_list p {
    display: inline-block;
    width: 100%;
    height: 100%;
    text-align: center;
    line-height: 320px;
    font-size: 20px;
    font-weight: bolder;
    color: #ffff;
    background-color: #34241473;
    cursor: pointer;
    letter-spacing: 5px;
}

.nav2_list p:hover {
    background-color: #342414b4;
}

footer {
    width: 1000px;
    margin: 0 auto;
    text-align: center;
    background-color: #DD9737;
}

footer img {
    width: 100px;
    padding: 20px 0px;
}

footer {
    color: #fff;
    line-height: 30px;
    font-size: 14px;
}

.main_box2 {
    margin: 20px auto;
}

#bar {
    background-color: #fff;
    line-height: 40px;
    padding: 0px 5px;
    margin-bottom: 30px;
    font-size: 14px;
}

.main_box2 h2 {
    font-size: 20px;
    line-height: 40px;
    border-bottom: 1px dotted #fff;
    margin-bottom: 10px;
}

.main_box2 h4 {
    margin: 20px 0px;
}

.main_box2 p {
    line-height: 28px;
}

.history {
    float: right;
    width: 200px;
    margin-left: 20px;
}

.nation_list span {
    display: inline-block;
    background-color: #ffffffa5;
    line-height: 30px;
    margin-bottom: 20px;
    padding: 0px 10px;
    border-radius: 4px;
}

.nation_list span:hover {
    background-color: #DD9737;
    color: #fff;
    cursor: pointer;
}

.nation {
    float: right;
    width: 300px;
    margin-top: 20px;
    border-radius: 10px;
}

#project_box li {
    margin-top: 50px;
}

#project_box li img {
    width: 400px;
    z-index: 2;

}

.project_box_text {}

#project_box li:nth-child(2n) .project_box_text {
    background-color: #fff;
    float: right;
    width: 578px;
    position: relative;
    right: -30px;
    box-sizing: border-box;
    padding: 40px 60px;
}

#project_box li:nth-child(2n-1) .project_box_text {
    background-color: #fff;
    float: left;
    width: 578px;
    position: relative;
    left: -30px;
    box-sizing: border-box;
    padding: 40px 60px;
}

#project_box li:nth-child(2n) {}

#project_box li:nth-child(2n) img {
    float: right;
    position: relative;
    top: -20px;
}

#project_box li:nth-child(2n-1) img {
    float: left;
    position: relative;
    top: -20px;
}

#project_box li:nth-child(2n-1) .project_box_text {
    float: left;
    position: relative;
}

#picture_information {
    font-size: 0px;
}

#picture_information li {
    width: 237px;
    float: left;
    margin-left: 10px;
    margin-bottom: 10px;
}

#picture_information img {
    width: 100%;
    height: 140px;
}

#picture_information li:nth-child(4n-3) {
    margin-left: 0px;
}

.yilu {
    width: 100%;
}

#login {
    text-align: center;
    margin-top: 50px;
}

#login ul li {
    line-height: 30px;
}

#login ul li button {
    width: 90px;
    line-height: 24px;
    font-size: 14px;
    margin-top: 50px;
}

#login ul li span {
    display: inline-block;
    text-align: right;
    width: 120px;
    margin-right: 20px;
}

#liuyan {
    width: 500px;
    margin: 0 auto;
}

#liuyan button {
    width: 90px;
    line-height: 24px;
    font-size: 14px;
    margin-top: 50px;
}

#liuyan ul li {}

#liuyan ul li span {
    float: left;
}

#liuyan ul li input {
    width: 300px;
    padding: 0px 10px;
    line-height: 30px;
}

#liuyan ul li textarea {
    width: 300px;
    padding: 10px;
}

#register li {
    margin: 20px 0px;
}

#register input {
    width: 220px;
    height: 24px;
    border: 1px solid #ccc;
}

select {
    width: 220px;
    height: 24px;
    border: 1px solid #ccc;

}