@font-face {
    font-family: 'bt';
    src: url('../font/优设标题黑.ttf') format('woff');
    font-weight: normal;
    font-style: normal;
}
body{
    margin: 0;
    padding: 0;
    background:url(../image/sb.png) no-repeat fixed center/cover;
    color: #333;
    min-width: 1100px;
}
.header {
    background-color: #132017; 
    color: #eaeaea;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 80px;
}
.logo {
    display: flex;
    align-items: center; 
}
.logo img {
    height: 28px; /* Logo 图标高度 */
    margin-right: 10px; /* Logo 与品牌名称之间的间距 */
}
.brand-name {
    font-family: 'bt';
    font-size: 20px;
    font-weight: 100;
}
ul,li{
    padding: 0;
    margin: 0;
    list-style: none;
}
.box-nav{
    width: 60%;
    display: flex;
    left: 40%; 
}
.nav{
    width: 900px;
    height: 6vh;
    margin-left: auto;
    display: flex;
}
.nav a{
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100%;
    color: #eaeaea;
}
.nav>.item{
    width: 20%;
    height: 100%;
    position: relative;
    transform: .4s;
}
.list{
    position: absolute;
    top: 90%;
    width: 100%;
    overflow: hidden;
    max-height: 0px;
    transition: .4s;
    border-radius: 0 0 10px 10px;
    background-color: #132017;
    z-index: 1;
}
.itemTwo{
    height: 65px;
}
.nav>.item:hover{
    background-color: #ade048;
}
.nav>.item:hover>.list{
    max-height: 500px;
}
a{
    text-decoration: none;
}
.itemTwo:hover{
    background-color: #ade048;
}
.flfg{
    width: 80%;
    margin: 40px auto;
    /* background:rgba(0, 0, 0, 0.6); */
    backdrop-filter: blur(40px);
    padding: 40px;
    display: flex;
    gap: 20px;
    border-radius: 30px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(5px);
    box-shadow: inset 0px 0px 6px rgba(255, 255, 255, 0.3),
    2px 2px 5px rgba(1, 51, 11, 0.2);
}
.flfg-left{
    width: 20%;
    text-align: center;
}
.flfg-left-title{
    background-color: #FED89F;
    border-radius: 15px;
}
.flfg-left h1{
    font-size: 24px;
    color: #333;
}
.flfg-left a{
    color: #333;
    text-decoration: none;
}
.flfg-left-title :hover{
    color: #32ab0a; 
}

.flfg-right{
    width: 80%;
    background-color: #e3f0de;
    border-radius: 30px;
    padding: 20px;
    box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.1);
}
.bottom{
    width: 100%;
    background-color: #132017;
}
.footer{
    width: 91%;
    margin: auto;
    padding-bottom: 18px;
    font-size: 14px;
    color: #ffffff;
    display: flex;
    justify-content: space-between;
}
.footer a {
    color: #ffffff;
    text-decoration: none;
}
.footer a:hover {
    text-decoration: underline;
}
.footer .item1{
    padding-top: 6px;
    padding-left: 10px;
}
.footer .item1 img{
    height: 36px; /* Logo 图标高度 */
    margin-right: 10px;
    vertical-align: middle;/* 使图片与文字垂直居中对齐 */
}
.footer .item1 .brand-name {
    font-size: 20px;
    font-weight: bold;
    vertical-align: middle; /* 使文字与图片垂直居中对齐 */
    display: inline-block;
    line-height: 36x; /
}
.footer .item2{
    display: flex;
    gap: 30px;
    padding-top: 20px;
}
.footer .item2 .nav1 a{
    display: block;
    margin-top: 10px;
}
.footer .item2 .nav1 .teshu{
    display: block;
    margin-top: 0;
}
.footer .item3{
    text-align: right;
    padding-top: 20px;
}
.footer .item3 .nav4{
    margin-bottom: 14px;
}
.footer .item3 .nav3{
    margin-top: 10px;
}
.footer .item3 .nav2 a,.footer .item3 .nav3 a,.footer .item3 .nav4{
    margin-right: 10px;
}
/* 文档内容 */
.bantou h1{
    text-align: center;
    font-size: 1.5em;
}
.bantou p{
    font-size: 1em;
    text-indent: 2em;
}
.banzhong{
    margin-top: 50px;
}
.banzhong h2{
    font-size: 1em;
    text-align: center;
    margin-top: 20px;
}
.banzhong p{
    font-size: 1em;
    text-indent: 2em;
}
.biaozhu p{
    font-size: 0.75em;
    color: #999;
}
.banwei{
    text-align: right;
}
/* 回到顶部 */
[id^="back-to-top"] {
    margin: 0;
    padding: 0;
    display: none;
    position: fixed;
    bottom: 200px;
    right: 20px;
    z-index: 99;
    border: none;
    outline: none;
    cursor: pointer;
    border-radius: 30px;
}
[id^="back-to-top"] img {
    text-align: center;
}
[id^="back-to-top"]:hover {
    background-color: #ade048;
}