* {
  font-family: 'PingFang SC',Arial,"Microsoft YaHei UI","Microsoft YaHei",serif;
  margin: 0;
  padding: 0;
  color: #333;
}

input {
  outline: none;
}

body {
  margin: 0 auto;
  padding: 0;
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: #000;
}

li {
  list-style: none;
  color: #3D3D3D;
}

header {
  height: 107px;
  margin: 0 auto;
  background-color: #004B8D;
}

header .header_wrap {
  width: 1400px;
  height: 106px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}



header .header_wrap .header_logo {
  display: flex;
  width: 497px;
  height: 58px;
}

header .header_wrap .header_logo img {
   width: 497px;
  height: 58px;
}

header .header_wrap .header_search {
  display: flex;
}

header .header_wrap .header_search input {
  width: 243px;
  height: 40px;
  padding-left: 10px;
  box-sizing: border-box;
  border: 2px solid #fff;
  border-radius: 4px 0 0 4px;
  overflow: hidden;
  font-size: 12px;
  background-color: #fff;
  opacity: 0.4;

}

header .header_wrap .header_search .img_wrap {
  width: 42px;
  height: 40px;
  display: flex;
  justify-content: center;
  align-items: center;
  border-radius: 0 4px 4px 0;
  overflow: hidden;
  background-color: #fff;
  opacity: 0.6;

}

header .header_wrap .header_search .img_wrap a {
  display: flex;
  justify-content: center;
  align-items: center;
}

header .header_wrap .header_search .img_wrap img {
  width: 100%;
  height: 100%;
}

nav {
    margin: 0 auto;
    background-color: #0A3A64;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

nav .wrap {
    max-width: 1400px;
    height: 50px;
    margin: 0 auto;
    display: flex;
    justify-content: space-around;
    align-items: center;
    padding: 0;
    list-style: none;
}

nav .wrap li {
    flex: 1;
    height: 50px;
    line-height: 50px;
    text-align: center;
    position: relative;
    margin: 0;
    padding: 0;
}

nav .wrap li .nav_fir {
    display: block;
    height: 100%;
    transition: background-color 0.3s ease;
}

nav .wrap li .nav_fir a {
    display: block;
    color: #fff;
    text-decoration: none;
    padding: 0 10px;
    transition: color 0.3s ease, background-color 0.3s ease;
}

nav .wrap li:hover .nav_fir {
    background-color: #fff;
}

nav .wrap li:hover .nav_fir a {
    color: #004B8D;
}
nav .wrap .active .nav_fir{
 background-color: #fff;
}
nav .wrap .active .nav_fir a {
    color: #004B8D;
}
nav .wrap li .nav_sec {
    position: absolute;
    background-color: #023a6c;
    display: none;
    z-index: 99;
    padding: 10px 0;
    min-width: 140px;
    left: 50%;
    transform: translateX(-50%);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
    border-radius: 0 0 4px 4px;
}

nav .wrap li .nav_sec ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

nav .wrap li .nav_sec li {
    display: block;
    height: auto;
    line-height: normal;
    width: 100%;
}

nav .wrap li .nav_sec li a {
    display: block;
    color: #fff;
    text-decoration: none;
    padding: 10px 20px;
    white-space: nowrap;
    transition: background-color 0.3s ease;
}

nav .wrap li .nav_sec li:hover a {
    background-color: #004B8D;
}


nav .wrap li:hover .nav_sec {
    display: block;
    animation: fadeIn 0.3s ease;
}


@keyframes fadeIn {
    from { opacity: 0; transform: translate(-50%, 10px); }
    to { opacity: 1; transform: translate(-50%, 0); }
}


@media (max-width: 768px) {
    nav .wrap {
        flex-wrap: wrap;
        height: auto;
    }
    
    nav .wrap li {
        flex-basis: 50%;
    }
}



footer {
  height: 240px;
  margin: 0 auto;
  font-size: 16px;
  background-image: url(../images/foot_bg.png);
  background-size: cover;
  margin-top: 50px;
  
}
footer div{
 color: #f1f1f1;
}
footer .wrap {
  width: 1400px;
  margin: 0 auto;
  display: flex; 
  flex-direction: column;
  align-items: center;
}
.footer_up{
  width: 100%;
  display: flex;
  flex-direction: row;
  align-items: center;
  border-bottom: 1px solid rgba(216, 216, 216, 0.5);
}
.footer_logo{
  width: 460px;
  height: 137px;
  line-height: 176px;
}
.footer_logo img{
  width: 360px;
}
.footer_erweima{
  width: 120px;
  margin-top: 30px;
  margin-bottom: 10px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.footer_erweima img{
  width: 80px;
  margin: 0 auto;
  margin-top: 5px;
} 
.footer_erweima div{
  font-size: 14px;
  text-align: center;
  margin-top: 5px;
}
.footer_link{
  width: calc(100% - 480px);
  display: flex;
  flex-direction: row;
  justify-content: end;
}
.footer_link img{
  height: 24px;
  margin: 0 10px 0 5px;
}
.footer_link select{
  background-color: rgba(255, 255, 255, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.5);
  outline: none;
  border-radius: 3px;
  height: 30px;
  position: relative;
  top: -4px;
  padding-left:10px;
}
.detail{
  width: 100%;
  text-align: left;
  font-size: 15px;
  margin-top: 13px;
  line-height: 28px;
}