body {
        background-color: #f5f5f5;
        color: #333;
        padding: 0;
        margin: 0;
    }/* 基础样式 */
:root {
    --primary-color: #4361ee;
    --primary-hover: #3a56d4;
    --text-color: #333;
    --text-light: #666;
    --bg-color: #fff;
    --menu-bg: #f8f9fa;
    --border-color: #e1e1e1;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}
 
/* 头部样式 */
.site-header {
    background-color: var(--bg-color);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
    position: sticky;
    top: 0;
    z-index: 1000;
}
 
.header-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
    position: relative;
}
 
.logo img {
    height: 40px;
    width: auto;
}
 
/* 主导航 */
.main-nav {
    flex: 1;
    margin: 0;
}
 
.nav-list {
    display: flex;
    justify-content: flex-end;
    list-style: none;
}
 
.nav-item {
    position: relative;
    margin: 0 5px;
}
 
.nav-item > a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    font-size: 16px;
    padding: 10px 15px;
    display: flex;
    align-items: center;
    transition: var(--transition);
}
 
.nav-item > a:hover {
    color: var(--primary-color);
}
 
/* 电脑端下拉箭头 */
.dropdown-icon {
    display: inline-flex;
    margin-left: 5px;
    transition: var(--transition);
}
 
.dropdown-icon::after {
    content: "";
    display: block;
    width: 4px;
    height: 4px;
    border-right: 2px solid currentColor;
    border-bottom: 2px solid currentColor;
    transform: rotate(-135deg);
    margin-top: 5px;
    transition: var(--transition);
}
 
.has-mega-menu:hover .dropdown-icon::after {
    transform: rotate(45deg);
    margin-top: -1px;
}
 
/* 巨型菜单外层 */
.mega-menu-wrapper {
    position: fixed;
    left: 0;
    right: 0;
    background-color: var(--menu-bg);
    box-shadow: var(--shadow);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    transform: translateY(10px);
    z-index: 99;
    padding: 25px 0;
    width: 100%;
}
 
.mega-menu {
    max-width: 1280px;
    margin: 0 auto;
    padding: 20px;
}
 
.mega-menu-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 20px;
}
 
.mega-menu-column {
    background-color: white;
    border-radius: 8px;
    padding: 15px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}
 
.mega-menu-title {
    color: var(--primary-color);
    font-size: 16px;
    font-weight: 600;
    margin: 0 0 15px 0;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-color);
}
 
.mega-menu-submenu {
    list-style: none;
    padding: 0;
    margin: 0;
}
 
.mega-menu-submenu li {
    margin-bottom: 8px;
}
 
.mega-menu-submenu a {
    display: block;
    color: var(--text-color);
    text-decoration: none;
    font-size: 14px;
    padding: 5px 0;
    transition: var(--transition);
}
 
.mega-menu-submenu a:hover {
    color: var(--primary-color);
    padding-left: 5px;
}
 
.has-mega-menu:hover .mega-menu-wrapper {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
 
/* 用户操作 */
.user-actions {
    display: flex;
    align-items: center;
}
 
.search-btn {
    color: var(--text-color);
    padding: 8px;
    margin-right: 10px;
    transition: var(--transition);
}
 
.search-btn:hover {
    color: var(--primary-color);
}
 
.login-btn {
    background-color: var(--primary-color);
    color: white;
    padding: 8px 16px;
    border-radius: 4px;
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    transition: var(--transition);
}
 
.login-btn:hover {
    background-color: var(--primary-hover);
}
 
/* 移动端菜单按钮 */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    width: 25px;
    height: 18px;
    position: relative;
    padding: 0;
    cursor: pointer;
    z-index: 1001;
}
 
.mobile-menu-toggle .menu-bar {
    position: absolute;
    width: 100%;
    height: 2px;
    background: var(--text-color);
    border-radius: 3px;
    left: 0;
    transition: all 0.3s cubic-bezier(0.77, 0, 0.175, 1);
}
 
.mobile-menu-toggle .menu-bar:nth-child(1) {
    top: 0;
    transform-origin: center;
}
 
.mobile-menu-toggle .menu-bar:nth-child(2) {
    top: 50%;
    transform: translateY(-50%);
}
 
.mobile-menu-toggle .menu-bar:nth-child(3) {
    bottom: 0;
    transform-origin: center;
}
 
.mobile-menu-toggle.active  .menu-bar:nth-child(1) {
    top: 50%;
    transform: translateY(-50%) rotate(45deg);
}
 
.mobile-menu-toggle.active  .menu-bar:nth-child(2) {
    opacity: 0;
    transform: translateY(-50%) scaleX(0);
}
 
.mobile-menu-toggle.active  .menu-bar:nth-child(3) {
    top: 50%;
    transform: translateY(-50%) rotate(-45deg);
}
 
/* 响应式设计 */
@media (max-width: 1200px) {
    .mega-menu-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}
 
@media (max-width: 992px) {
    .mega-menu-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}
 
@media (max-width: 768px) {
    .main-nav, .user-actions {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    /* 移动端头像菜单点击事件 */
    .nav-item.has-mega-menu  > a .dropdown-icon {
        display: none;
    }
    
    .main-nav.active  {
        display: block;
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        bottom: 0;
        background-color: var(--bg-color);
        overflow-y: auto;
        padding: 20px;
        z-index: 999;
    }
    
    .nav-list {
        flex-direction: column;
    }
    
    .nav-item {
        margin: 5px 0;
        border-bottom: 1px solid var(--border-color);
    }
    
    .nav-item > a {
        padding: 12px 0;
        justify-content: space-between;
    }
    
    /* 移动端下拉菜单 */
    .mega-menu-wrapper {
        position: static;
        box-shadow: none;
        opacity: 1;
        visibility: visible;
        transform: none;
        display: none;
        padding: 0;
        margin-top: 10px;
        border-left: 3px solid var(--primary-color);
        background-color: rgba(67, 97, 238, 0.05);
    }
    
    .mega-menu-wrapper.active  {
        display: block;
    }
    
    .mega-menu-grid {
        grid-template-columns: 1fr;
    }
    
    .user-actions.active  {
        display: flex;
        margin-top: 20px;
        padding-top: 20px;
        border-top: 1px solid var(--border-color);
    }
}
 
/* 移动端加号/减号样式 */
@media (max-width: 768px) {
    .nav-item.has-mega-menu  > a .mobile-expand-icon {
        display: inline-flex;
        margin-left: auto;
        width: 16px;
        height: 16px;
        position: relative;
    }
    
    .nav-item.has-mega-menu  > a .mobile-expand-icon::before,
    .nav-item.has-mega-menu  > a .mobile-expand-icon::after {
        content: "";
        position: absolute;
        background-color: var(--text-color);
        transition: var(--transition);
    }
    
    /* 默认加号样式 */
    .nav-item.has-mega-menu  > a .mobile-expand-icon::before {
        width: 100%;
        height: 2px;
        top: 50%;
        transform: translateY(-50%);
    }
    
    .nav-item.has-mega-menu  > a .mobile-expand-icon::after {
        width: 2px;
        height: 100%;
        left: 50%;
        transform: translateX(-50%);
    }
    
    /* 展开时减号样式 */
    .nav-item.has-mega-menu  > a.active  .mobile-expand-icon::after {
        opacity: 0;
        transform: translateX(-50%) rotate(90deg);
    }
    
    /* 隐藏电脑端箭头 */
    .nav-item.has-mega-menu  > a .dropdown-icon {
        display: none;
    }
} 
        
.dm-nav-item {
    position: relative;
    list-style: none;
    margin: 0 5px;
}
        
.dm-nav-item a {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: #333;
    font-weight: 500;
    padding: 10px 15px;
    transition: all 0.3s ease;
}
        
.dm-nav-item a:hover {
    color: #0000ff;
}
        
.dm-dropdown-icon {
    content: "";
    display: block;
    width: 6px;
    height: 6px;
    border-right: 2px solid currentColor;
    border-bottom: 2px solid currentColor;
    transform: rotate(-135deg);
    margin-top: 5px;
    margin-left: 5px;
    transition: var(--transition);
}
        
.dm-mobile-expand-icon {
    display: none;
    margin-left: auto;
    width: 16px;
    height: 16px;
    position: relative;
}
        
.dm-mobile-expand-icon::before,
.dm-mobile-expand-icon::after {
    content: '';
    position: absolute;
    background-color: #333;
    transition: all 0.3s ease;
}
        
.dm-mobile-expand-icon::before {
    top: 50%;
    left: 0;
    width: 100%;
    height: 2px;
    transform: translateY(-50%);
}
        
.dm-mobile-expand-icon::after {
    top: 0;
    left: 50%;
    width: 2px;
    height: 100%;
    transform: translateX(-50%);
}
        
/* 下拉菜单样式 */
.dm-mega-menu-wrapper {
    position: absolute;
    right: 0;
    top: 57px;
    width: 200px;
    background-color: #fff;
    box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.3s ease;
    z-index: 1000;
    border-radius: 0 0 5px 5px;
    overflow: hidden;
}
        
.dm-mega-menu {
    padding: 10px 0;
}
        
.dm-mega-menu-submenu {
    list-style: none;
    padding-left: 0;
}
        
.dm-mega-menu-submenu li a {
    padding: 8px 20px;
    white-space: nowrap;
    display: block;
    font-size: 14px;
}
        
.dm-mega-menu-submenu li a:hover {
    background-color: #f5f5f5;
}
        
/* 悬停时显示下拉菜单 */
.dm-nav-item:hover .dm-mega-menu-wrapper {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
        
.dm-nav-item:hover .dm-dropdown-icon {
    transform: rotate(45deg);
}
        
/* 移动设备样式 */
@media (max-width: 768px) {
    .dm-nav-item {
        width: 100%;
    }
    .dm-nav-item a {
        padding: 10px 0;
    }
    .dm-nav-item {
        margin: 0;
    }
    .dm-dropdown-icon {
        display: none;
    }
    .tooltip {
        top: 10px; 
        right: -20px; 
        left: auto;
    }
    .dm-mobile-expand-icon {
        display: block;
    }
            
    .dm-mega-menu-wrapper {
        position: static;
        width: 100%;
        max-height: 0;
        overflow: hidden;
        box-shadow: none;
        transform: none;
        transition: max-height 0.3s ease;
    }
    .dm-mega-menu {
        padding: 20px;
        border-left: 3px solid var(--primary-color);
        background-color: rgba(67, 97, 238, 0.05);
    }
        
    .dm-mega-menu-submenu {
        list-style: none;
        background-color: white;
        border-radius: 8px;
        padding: 15px;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    }
    .dm-mega-menu-submenu li a {
        padding-left: 30px;
    }
            
    /* 移动设备展开状态 */
    .dm-nav-item.active  .dm-mega-menu-wrapper {
        max-height: 500px;
        opacity: 1;
        visibility: visible;
    }
            
    .dm-nav-item.active  .dm-mobile-expand-icon::after {
        transform: translateX(-50%) rotate(90deg);
    }
}
 
/* 搜索图标样式 */
.search-icon {
    font-size: 20px;
    cursor: pointer;
    color: #333;
    transition: all 0.3s;
    padding: 0 10px 0 20px;
}
        
.search-icon:hover {
    color: #666;
}
        
/* 遮罩层样式 */
.search-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    display: none;
    justify-content: center;
    align-items: flex-start;
    padding-top: 15vh;
    z-index: 1000;
}
        
/* 搜索框容器 */
.search-container {
    background-color: white;
    padding: 30px 20px 20px;
    border-radius: 8px;
    width: 90%;
    max-width: 600px;
    position: relative;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    margin-top: 20px; /* 为关闭按钮留出空间 */
}
        
/* 搜索框样式 */
.search-input {
    width: 100%;
    max-width: 558px;
    padding: 12px 20px;
    font-size: 16px;
    border: 1px solid #ddd;
    border-radius: 30px;
    outline: none;
    transition: all 0.3s;
}
        
.search-input:focus {
    border-color: #4a90e2;
    box-shadow: 0 0 0 2px rgba(74, 144, 226, 0.2);
}
        
/* 搜索按钮 */
.search-button {
    position: absolute;
    right: 30px;
    top: 57%;
    transform: translateY(-50%);
    background: none;
    border: none;
    cursor: pointer;
    color: #666;
}
        
/* 关闭按钮 - 调整到更远的位置 */
.close-button {
    position: absolute;
    right: 0px;
    top: -40px; /* 上移到搜索框上方 */
    font-size: 24px;
    cursor: pointer;
    color: white;
    background: none;
    border: none;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.3s;
}
        
.close-button:hover {
    color: #fff;
    background-color: rgba(255, 255, 255, 0.2);
}
        
/* 移动设备适配 */
@media (max-width: 768px) {
    .search-icon {
        position: absolute;
        top: 25px;
        right: 55px;
    }
    .search-overlay {
        padding-top: 10vh;
    }
            
    .search-container {
        padding: 25px 15px 15px;
        margin-top: 15px;
    }
            
    .search-input {
        padding: 10px 15px;
        font-size: 14px;
    }
            
    .search-button {
        right: 25px;
    }
            
    .close-button {
        right: 10px;
        top: -35px;
        width: 35px;
        height: 35px;
        font-size: 20px;
    }
}
/* 底部整体样式 */
.site-footer {
    background-color: #2c3e50;
    color: #ecf0f1;
    padding: 40px 20px 20px;
    font-size: 14px;
    line-height: 1.6;
}

.footer-container {
    max-width: 1300px;
    margin: 0 auto;
    padding: 0;
}

.footer-main {
    display: flex;
    flex-wrap: wrap;
    gap: 40px;
    margin-bottom: 30px;
}

.footer-logo {
    flex: 1;
    min-width: 240px;
}

.footer-logo a {
    font-size: 24px;
    font-weight: bold;
    color: #fff;
    text-decoration: none;
    display: block;
    margin-bottom: 10px;
}

.footer-desc {
    color: #bdc3c7;
    margin: 0;
}

.footer-links {
    flex: 4;
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
}

.footer-column {
    flex: 1;
    min-width: 150px;
}

.footer-title {
    color: #fff;
    font-size: 16px;
    margin: 0 0 15px 0;
    padding-bottom: 8px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-column ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-column li {
    margin-bottom: 10px;
}

.footer-column a {
    color: #bdc3c7;
    text-decoration: none;
    transition: color 0.3s;
    display: block;
}

.footer-column a:hover {
    color: #fff;
}

/* 如果你后续启用社交图标，可保留这段 */
.footer-social {
    margin-top: 15px;
}

.social-icon {
    display: flex;
    align-items: center;
    gap: 8px;
    color: #bdc3c7;
    text-decoration: none;
    margin-bottom: 12px;
    transition: color 0.3s;
}

.social-icon:hover {
    color: #fff;
}

/* 二维码布局（根据你二维码嵌套结构） */
.footer-qrcodes {
    display: flex;
    gap: 20px;
}

.qrcode-item {
    text-align: center;
}

.qrcode-item img {
    width: 100px;
    height: 100px;
    object-fit: contain;
    border-radius: 8px;
    background-color: #fff;
    padding: 5px;
}

.qrcode-item p {
    margin-top: 8px;
    color: #bdc3c7;
    font-size: 13px;
}

/* 联系信息（如启用） */
.footer-contact {
    margin-top: 20px;
    color: #bdc3c7;
}

.footer-contact p {
    margin: 5px 0;
}

/* 版权区域 */
.footer-copyright {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #7f8c8d;
    font-size: 13px;
}

.footer-copyright a {
    color: #7f8c8d;
    text-decoration: none;
}

.footer-copyright a:hover {
    text-decoration: underline;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .footer-main {
        flex-direction: column;
        gap: 30px;
    }

    .footer-links {
        flex-direction: column;
        gap: 25px;
    }

    .footer-column {
        min-width: 100%;
    }

    .footer-qrcodes {
        flex-direction: column;
        align-items: center;
    }

    .qrcode-item img {
        width: 120px;
        height: 120px;
    }
}