/* 头部样式 */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    transition: all var(--transition-medium);
    box-shadow: var(--shadow-sm);
}

header.scrolled {
    background-color: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-md);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
    box-sizing: border-box;
}

.header-inner {
    height: 80px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

/* 更新后的logo样式 */
.logo {
    display: flex;
    align-items: center;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
}

.logo-image {
    height: 45px;
    display: flex;
    align-items: center;
}

.logo-image img {
    max-height: 100%;
    width: auto;
    transition: transform var(--transition-medium);
}

.logo:hover .logo-image img {
    transform: scale(1.02);
}

/* 导航包装器样式修复 - 确保导航靠右 */
.nav-wrapper {
    display: flex;
    align-items: center;
    margin-left: auto;
    gap: 15px;
    justify-content: flex-end; /* 确保导航靠右 */
}

/* 导航菜单项之间的间距缩小 */
.nav-menu {
    display: flex;
    align-items: center;
    gap: 22px; /* 缩小间距 */
}

/* 导航链接样式微调 */
.nav-link {
    color: var(--gray-dark);
    font-weight: 500;
    position: relative;
    padding: var(--spacing-xs) var(--spacing-sm);
    display: flex;
    align-items: center;
}

.nav-link::before {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width var(--transition-medium);
}

.nav-link:hover, .nav-link.active {
    color: var(--primary);
}

.nav-link:hover::before, .nav-link.active::before {
    width: 100%;
}

/* 导航图标与文本间距调整 */
.nav-link i {
    margin-right: 8px; /* 图标与文本之间的间距 */
}

/* 下拉菜单样式调整 */
.dropdown {
    position: relative;
    padding-bottom: 5px;
}

/* 下拉箭头图标间距调整 */
.dropdown-icon {
    font-size: 1.2rem;
    margin-left: 6px; /* 调整下拉箭头与文本的间距 */
}

.dropdown-menu {
    position: absolute;
    top: calc(100% + 15px);
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    background: white;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    width: 200px;
    padding: var(--spacing-sm) 0;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-medium);
    z-index: 101;
}

.dropdown::after {
    content: '';
    position: absolute;
    top: calc(100% + 7px);
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
    border-bottom: 8px solid white;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-medium);
    z-index: 102;
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.dropdown:hover::after {
    opacity: 1;
    visibility: visible;
}

.dropdown-menu li a {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--gray-dark);
    transition: all var(--transition-fast);
    text-align: center;
}

.dropdown-menu li a:hover {
    background: rgba(0, 70, 184, 0.05);
    color: var(--primary);
    padding-left: calc(var(--spacing-md) + 5px);
}

/* 下拉菜单分隔线 */
.dropdown-divider {
    height: 1px;
    margin: 8px 12px;
    overflow: hidden;
    background-color: rgba(0, 0, 0, 0.1);
    border: 0;
}

/* 语言切换器调整 */
.language-switcher {
    position: relative;
    margin-left: 20px; /* 与导航项之间的距离 */
    z-index: 102;
}

.current-lang {
    display: flex;
    align-items: center;
    cursor: pointer;
    color: var(--gray-dark);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.current-lang:hover {
    color: var(--primary);
    background-color: rgba(0, 70, 184, 0.05);
}

.current-lang i {
    margin-left: var(--spacing-xs);
    font-size: 1.2rem;
}

.current-lang i:first-child {
    margin-right: var(--spacing-xs);
    color: var(--primary);
    margin-left: 0;
}

.lang-dropdown {
    position: absolute;
    top: calc(100% + 15px);
    right: 0;
    background: white;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    width: 140px;
    padding: var(--spacing-sm) 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--transition-medium);
}

.language-switcher:hover .lang-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-dropdown a {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--gray-dark);
    transition: all var(--transition-fast);
    text-align: center;
}

.lang-dropdown a:hover {
    background: rgba(0, 70, 184, 0.05);
    color: var(--primary);
    padding-left: calc(var(--spacing-md) + 5px);
}

.hamburger {
    display: none;
    width: 30px;
    height: 22px;
    cursor: pointer;
    position: relative;
    margin-left: var(--spacing-md);
}

.hamburger span {
    display: block;
    position: absolute;
    height: 3px;
    width: 100%;
    background: var(--primary);
    border-radius: 3px;
    opacity: 1;
    left: 0;
    transform: rotate(0deg);
    transition: .25s ease-in-out;
}

.hamburger span:nth-child(1) {
    top: 0;
}

.hamburger span:nth-child(2) {
    top: 9px;
}

.hamburger span:nth-child(3) {
    top: 18px;
}

.hamburger.active span:nth-child(1) {
    top: 9px;
    transform: rotate(135deg);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
    left: -60px;
}

.hamburger.active span:nth-child(3) {
    top: 9px;
    transform: rotate(-135deg);
}

/* 登录注册按钮样式调整 */
.login-link,
.register-link {
    display: inline-block;
    margin-left: 0; /* 调整间距 */
}

.login-link a,
.register-link a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-weight: 500;
    transition: all var(--transition-fast);
}

.login-link a {
    color: var(--primary);
    border: 1px solid var(--primary);
    background-color: transparent;
}

.login-link a:hover {
    background-color: rgba(0, 102, 255, 0.08);
}

/* 调整注册按钮的颜色为更深的蓝色 */
.register-link a {
    color: white;
    background-color: #2952cc; /* 更深的蓝色，匹配图1 */
    border: 1px solid #2952cc;
}

.register-link a:hover {
    background-color: #1e3ea3; /* 悬停时更深 */
    border-color: #1e3ea3;
}

/* 用户下拉菜单样式 */
.user-menu .user-link {
    display: flex;
    align-items: center;
    color: var(--gray-dark);
}

.user-menu .user-link i.fa-user-circle {
    font-size: 1.8rem;
    margin-right: 8px;
    color: var(--primary);
}

.user-menu .dropdown-menu {
    min-width: 220px; /* 确保有足够宽度显示管理员菜单项 */
}

.user-menu .dropdown-menu li a {
    display: flex;
    align-items: center;
    text-align: left;
    padding: 8px 15px;
    transition: background-color 0.2s;
}

.user-menu .dropdown-menu li a:hover {
    background: rgba(0, 70, 184, 0.05);
    color: var(--primary);
}

.user-menu .dropdown-menu li a i {
    width: 20px;
    margin-right: 10px;
    text-align: center;
}

/* 管理员菜单项特殊样式 */
.user-menu .dropdown-menu li a[href*="admin"] {
    color: #0066FF;
}

.user-menu .dropdown-menu li a[href*="admin"]:hover {
    background-color: rgba(0, 102, 255, 0.1);
}

/* 退出登录按钮样式 */
.user-menu .dropdown-menu li a[href*="logout"] {
    color: #FF3B30;
}

.user-menu .dropdown-menu li a[href*="logout"]:hover {
    background-color: rgba(255, 59, 48, 0.1);
}

/* 确保页面主体内容有顶部内边距，避免被固定头部覆盖 */
#main {
    padding-top: 80px;
}

/* 响应式样式 */
@media (max-width: 1200px) {
    .container {
        max-width: 100%;
    }
}

@media (max-width: 992px) {
    .nav-menu {
        position: fixed;
        top: 80px;
        left: 0;
        width: 100%;
        background: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(10px);
        flex-direction: column;
        align-items: flex-start;
        padding: var(--spacing-xl) 0;
        box-shadow: var(--shadow-md);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-medium);
        z-index: 90;
        gap: var(--spacing-lg);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .hamburger {
        display: block;
    }
    
    .dropdown-menu {
        position: static;
        width: 100%;
        box-shadow: none;
        opacity: 1;
        visibility: visible;
        transform: none;
        padding-left: var(--spacing-xl);
        display: none;
    }
    
    .dropdown.active .dropdown-menu {
        display: block;
    }
    
    .dropdown::after {
        display: none;
    }
    
    /* 分隔线在移动设备上的样式 */
    .dropdown-divider {
        margin: 8px 0;
    }
    
    /* 移动端登录注册按钮样式 */
    .login-link,
    .register-link {
        margin: 5px 15px;
        width: calc(100% - 30px);
    }
    
    .login-link a,
    .register-link a {
        width: 100%;
        text-align: center;
        padding: 10px;
    }
    
    .user-menu .dropdown-menu {
        width: 100%;
        position: static;
        box-shadow: none;
        border-radius: 0;
        padding: 0;
    }
    
    .user-menu .user-link {
        width: 100%;
        padding: var(--spacing-sm) var(--spacing-md);
    }
}

@media (max-width: 768px) {
    .header-inner {
        height: 70px; /* 在移动设备上略微降低高度 */
    }
    
    .logo-image {
        height: 35px; /* 调整logo图片高度 */
    }
    
    #main {
        padding-top: 70px; /* 调整主内容的顶部内边距以匹配较小的头部高度 */
    }
}

@media (max-width: 480px) {
    .header-inner {
        height: 60px; /* 在超小屏幕上进一步降低高度 */
    }
    
    .logo-image {
        height: 30px; /* 调整logo图片高度 */
    }
    
    #main {
        padding-top: 60px; /* 调整主内容的顶部内边距以匹配更小的头部高度 */
    }
}