html{
min-width:1400px;
margin:0px auto;	
	
}

.header {
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    width: 100%;
    height: 109px;
    top: 0;
    z-index: 9999;
    background-color: white;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    height: 109px;
}

.logo {
    display: flex;
    align-items: center;
    font-size: 20px;
    font-weight: bold;
}

.logo img {
    margin-right: 10px;
}

.nav-menu {
    width: 968px;
    height: 19px;
    display: flex;
    list-style: none;
    justify-content: center;
    margin: 0;
    padding: 0;
    margin-top: -30px;
}

.nav-menu li {
    margin-right: 40px;
    position: relative;
}

.nav-menu li:last-child {
    margin-right: 0;
}

.nav-menu a {
    text-decoration: none;
    color: #333;
    font-family: Microsoft YaHei;
    font-weight: 400;
    font-size: 18px;
    transition: color 0.3s;
    display: block;
    padding: 10px 0;
}

.nav-menu a:hover {
    color: #0066cc;
}

.nav-menu .active::after {
    content: '';
    position: absolute;
    bottom: -30px;
    left: 0;
    width: 100%;
    height: 3px;
    background-color: #0066cc;
}

.nav-menu li:nth-child(3) .dropdown-menu {
    top: 35px;
    left: -17px;
}

.nav-menu li:nth-child(4) .dropdown-menu {
    top: 35px;
    left: -17px;
}

.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-toggle::after {
    content: "▼";
    font-size: 0.8rem;
    margin-left: 5px;
    color: #666;
}

.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: white;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1001;
    list-style: none;
    padding: 0;
    margin: 0;
    border-radius: 4px;
    overflow: hidden;
}

.dropdown-menu li {
    padding: 0;
    width: 100%;
}

.dropdown-menu a {
    display: block;
    padding: 10px 15px;
    color: #333;
    text-decoration: none;
    font-size: 14px;
    transition: background-color 0.2s, color 0.2s;
    white-space: nowrap;
}

.dropdown-menu a:hover {
    background-color: #f5f5f5;
    color: #0066cc;
}

.dropdown:hover .dropdown-menu {
    display: block;
}

.download {
    position: relative; 
    width: 91px;
    height: 19px;
    font-family: Microsoft YaHei;
    font-weight: 400;
    font-size: 18px;
    color: #2A2A2A;
    line-height: 19px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.download:hover {
    background-color: transparent;
}

.download > a {
    color: inherit;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    white-space: nowrap;
}

.download > a::after {
    content: "▼";
    font-size: 0.8rem;
    margin-left: 5px;
    color: #666;
    display: inline-block;
}

.qrcode-dropdown {
    display: none;
    position: absolute;
    top: 100%; 
    left: 50%;
    transform: translateX(-50%);
    background: white;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 10000; 
    border-radius: 8px;
    padding: 20px;
    text-align: center;
    min-width: 190px;
    border: 1px solid #eee; 
}

.download:hover .qrcode-dropdown {
    display: block;
}

.qrcode-item img {
    width: 150px;
    height: 150px;
    border: 1px solid #eee;
    border-radius: 4px;
    display: block;
}

.header-box {
    margin-top: 109px; 
    height: 680px;
    width: 100%;
    position: relative;
}