/**
 * 小月短链接平台 - 自定义主题优化
 * 版本: 2.0
 * 更新时间: 2025-11
 */

/* ===================================
   A. 主色调系统优化
   =================================== */
:root {
    /* 主色调渐变系统 */
    --primary-50: #eff6ff;
    --primary-100: #dbeafe;
    --primary-200: #bfdbfe;
    --primary-500: #206bc4;
    --primary-600: #1b59a3;
    --primary-700: #164785;
    
    /* 渐变系统 */
    --gradient-primary: linear-gradient(135deg, #206bc4 0%, #1b59a3 100%);
    --gradient-hero: linear-gradient(135deg, #206bc4 0%, #1e3a8a 100%);
    --gradient-card: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
    --gradient-hover: linear-gradient(135deg, #1b59a3 0%, #164785 100%);
    
    /* ===================================
       B. 中性色优化 - 更柔和的灰度系统
       =================================== */
    --gray-50: #fafbfc;
    --gray-100: #f4f6f8;
    --gray-200: #e8ecef;
    --gray-300: #dde2e7;
    --gray-600: #64748b;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    
    /* ===================================
       C. 功能色增强
       =================================== */
    /* 成功色 */
    --success: #10b981;
    --success-light: #d1fae5;
    --success-dark: #059669;
    
    /* 警告色 */
    --warning: #f59e0b;
    --warning-light: #fef3c7;
    --warning-dark: #d97706;
    
    /* 错误色 */
    --error: #ef4444;
    --error-light: #fee2e2;
    --error-dark: #dc2626;
    
    /* 信息色 */
    --info: #3b82f6;
    --info-light: #dbeafe;
    
    /* 阴影系统 */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* 过渡动画 */
    --transition-base: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===================================
   页面整体背景优化
   =================================== */
body {
    background: var(--gray-50) !important;
    color: var(--gray-900) !important;
}

/* ===================================
   导航栏主体优化
   =================================== */
.navbar {
    background: linear-gradient(180deg, #ffffff 0%, var(--gray-50) 100%) !important;
    border-bottom: 1px solid var(--gray-200) !important;
    box-shadow: var(--shadow-sm) !important;
    backdrop-filter: blur(10px);
    transition: var(--transition-base);
    position: relative;
    z-index: 1020;
}

.navbar:hover {
    box-shadow: var(--shadow-md) !important;
}

/* 导航品牌 Logo 区域 */
.navbar-brand {
    font-weight: 600;
    color: var(--gray-900) !important;
    transition: var(--transition-fast);
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
}

.navbar-brand:hover {
    background: var(--gray-100);
    transform: translateY(-1px);
}

/* ===================================
   导航链接优化
   =================================== */
.nav-link {
    color: var(--gray-800) !important;
    font-weight: 500;
    padding: 0.625rem 1rem !important;
    border-radius: 0.5rem;
    transition: var(--transition-fast);
    position: relative;
    margin: 0 0.25rem;
}

.nav-link:hover {
    color: var(--primary-600) !important;
    background: var(--primary-50) !important;
    transform: translateY(-2px);
}

/* 激活状态的导航链接 */
.nav-item.active .nav-link,
.nav-link.active {
    color: #ffffff !important;
    background: var(--gradient-primary) !important;
    box-shadow: 0 4px 12px rgba(32, 107, 196, 0.3);
    font-weight: 600;
}

/* 确保激活状态的所有子元素都是白色 */
.nav-item.active .nav-link *,
.nav-link.active * {
    color: #ffffff !important;
}

.nav-item.active .nav-link:hover {
    background: var(--gradient-hover) !important;
    transform: translateY(-2px);
}

/* 导航链接下划线动画 */
.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition-base);
    transform: translateX(-50%);
}

.nav-link:hover::after {
    width: 80%;
}

.nav-link.active::after {
    width: 0;
}

/* ===================================
   下拉菜单优化 - 统一样式
   =================================== */
.dropdown-menu {
    border: 1px solid var(--gray-200) !important;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.2) !important;
    border-radius: 0.75rem !important;
    padding: 0.5rem !important;
    background: #ffffff !important;
    margin-top: 0.5rem !important;
    animation: dropdownFadeIn 0.3s ease;
    z-index: 1030 !important; /* 统一z-index */
}

@keyframes dropdownFadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 导航菜单栏布局 */
#navbar-menu .navbar-nav {
    display: flex;
    align-items: center;
    flex-wrap: nowrap;
    width: 100%;
}

/* 用户区域自动推到右侧 */
#navbar-menu .navbar-nav .nav-item.ml-auto {
    margin-left: auto !important;
}

/* 通知图标样式 */
#navbar-menu .nav-item .nav-link {
    position: relative;
}

#navbar-menu .nav-item .badge {
    position: absolute;
    top: 4px;
    right: 4px;
}

/* 菜单栏中的用户头像和名称 */
#navbar-menu .nav-item.dropdown .avatar {
    margin-right: 0.5rem;
}

#navbar-menu .nav-item.dropdown .nav-link {
    display: flex;
    align-items: center;
    padding: 0.5rem 1rem !important;
    border-radius: 0.5rem;
    transition: all 0.2s ease;
}

#navbar-menu .nav-item.dropdown .nav-link:hover {
    background: var(--primary-50);
}

/* 下拉菜单分割线 */
.dropdown-divider {
    border-top: 1px solid var(--gray-200) !important;
    margin: 0.5rem 0 !important;
}

/* 用户信息区域 */
.nav-link .d-xl-block {
    line-height: 1.3;
}

.nav-link .d-xl-block div {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gray-800);
}

.dropdown-item {
    color: var(--gray-800) !important;
    padding: 0.625rem 1rem !important;
    border-radius: 0.5rem !important;
    transition: var(--transition-fast);
    font-weight: 500;
    display: flex;
    align-items: center;
    margin: 0.125rem 0;
}

.dropdown-item:hover {
    background: var(--primary-50) !important;
    color: var(--primary-600) !important;
    transform: translateX(4px);
    box-shadow: var(--shadow-sm);
}

.dropdown-item.active,
.dropdown-item:active {
    background: var(--gradient-primary) !important;
    color: #ffffff !important;
}

/* 下拉菜单图标优化 */
.dropdown-item-icon {
    display: inline-block;
    width: 20px;
    height: 20px;
    margin-right: 0.75rem;
    color: var(--primary-500);
    transition: var(--transition-fast);
    flex-shrink: 0;
    vertical-align: middle;
}

.dropdown-item {
    display: flex !important;
    align-items: center !important;
}

.dropdown-item:hover .dropdown-item-icon {
    transform: scale(1.1) rotate(5deg);
    color: var(--primary-600);
}

/* ===================================
   下拉切换箭头优化
   =================================== */
.dropdown-toggle::after {
    margin-left: 0.5rem;
    transition: var(--transition-fast);
}

.dropdown-toggle[aria-expanded="true"]::after {
    transform: rotate(180deg);
}

/* ===================================
   导航图标优化
   =================================== */
.nav-link-icon {
    display: inline-flex !important;
    align-items: center;
    justify-content: center;
    color: var(--primary-500);
    margin-right: 0.5rem;
    transition: var(--transition-fast);
    flex-shrink: 0;
}

.nav-link-icon .icon {
    width: 20px;
    height: 20px;
    display: block;
}

.nav-link:hover .nav-link-icon {
    transform: scale(1.1);
    color: var(--primary-600);
}

/* 激活状态的图标必须是白色 */
.nav-item.active .nav-link .nav-link-icon,
.nav-link.active .nav-link-icon {
    color: #ffffff !important;
}

/* 激活状态的图标 SVG */
.nav-item.active .nav-link .nav-link-icon svg,
.nav-link.active .nav-link-icon svg {
    stroke: #ffffff !important;
    color: #ffffff !important;
}

/* 激活状态的下拉箭头也要白色 */
.nav-item.active .nav-link.dropdown-toggle::after,
.nav-link.active.dropdown-toggle::after {
    border-top-color: #ffffff !important;
}

/* 确保导航链接内容对齐 */
.nav-link {
    display: flex !important;
    align-items: center !important;
}

.nav-link-title {
    display: inline-block;
    vertical-align: middle;
}

/* ===================================
   用户头像区域优化
   =================================== */
.avatar {
    background: var(--gradient-primary) !important;
    color: #ffffff !important;
    font-weight: 600;
    box-shadow: var(--shadow-md);
    transition: var(--transition-fast);
    border: 2px solid #ffffff;
}

.avatar:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

/* 下拉菜单尺寸 */
.nav-item.dropdown .dropdown-menu {
    min-width: 200px !important;
    max-width: 280px !important;
}

.nav-item.dropdown .dropdown-menu .dropdown-item {
    display: flex !important;
    align-items: center !important;
    padding: 0.75rem 1rem !important;
    white-space: nowrap !important;
}

.nav-item.dropdown .dropdown-menu .dropdown-item .icon,
.nav-item.dropdown .dropdown-menu .dropdown-item svg {
    width: 20px !important;
    height: 20px !important;
    margin-right: 0.75rem !important;
    flex-shrink: 0 !important;
}

/* 后台管理菜单项特殊标识 */
.nav-item.dropdown .dropdown-menu .dropdown-item:first-child {
    border-bottom: 1px solid var(--gray-200);
    margin-bottom: 0.25rem;
    padding-bottom: 0.75rem;
}

/* 用户名显示优化 */
.nav-link.d-flex {
    cursor: pointer;
    padding: 0.5rem !important;
    border-radius: 0.5rem;
    transition: var(--transition-fast);
}

.nav-link.d-flex:hover {
    background: var(--primary-50) !important;
}

/* ===================================
   徽章优化
   =================================== */
.badge {
    padding: 0.25rem 0.5rem;
    border-radius: 0.375rem;
    font-weight: 600;
    font-size: 0.75rem;
}

.badge.bg-red,
.badge-danger {
    background: var(--error) !important;
    color: #ffffff !important;
    box-shadow: 0 2px 8px rgba(239, 68, 68, 0.3);
}

.badge-info {
    background: var(--info) !important;
    color: #ffffff !important;
}

.badge-success {
    background: var(--success) !important;
    color: #ffffff !important;
}

.badge-warning {
    background: var(--warning) !important;
    color: var(--gray-900) !important;
}

/* ===================================
   响应式优化 - 移动端优先
   =================================== */

/* 移动端基础优化 (<768px) */
@media (max-width: 767px) {
    /* 导航栏优化 */
    .navbar {
        padding: 0.5rem 0.75rem !important;
        position: sticky !important;
        top: 0 !important;
        z-index: 1030 !important;
    }
    
    /* 导航头部优化 */
    .navbar > .container-xl {
        padding: 0 !important;
        display: flex !important;
        flex-wrap: wrap !important;
        align-items: center !important;
        justify-content: space-between !important;
    }
    
    /* 菜单按钮在移动端特别优化 */
    .navbar-toggler {
        order: 1 !important;
        margin-right: 0.75rem !important;
        border: none !important;
        background: linear-gradient(135deg, #206bc4 0%, #0ea5e9 100%) !important;
        box-shadow: 0 4px 12px rgba(32, 107, 196, 0.3) !important;
        border-radius: 0.75rem !important;
        padding: 0.625rem 0.75rem !important;
        width: 48px !important;
        height: 48px !important;
        display: flex !important;
        align-items: center !important;
        justify-content: center !important;
        transition: all 0.3s ease !important;
        position: relative !important;
        overflow: hidden !important;
    }
    
    .navbar-toggler::before {
        content: '';
        position: absolute;
        top: 50%;
        left: 50%;
        width: 100%;
        height: 100%;
        background: rgba(255, 255, 255, 0.2);
        border-radius: 50%;
        transform: translate(-50%, -50%) scale(0);
        transition: transform 0.5s ease;
    }
    
    .navbar-toggler:active::before {
        transform: translate(-50%, -50%) scale(2);
    }
    
    .navbar-toggler:active {
        transform: scale(0.95) !important;
        box-shadow: 0 2px 8px rgba(32, 107, 196, 0.4) !important;
    }
    
    .navbar-toggler:focus {
        outline: none !important;
        box-shadow: 0 4px 16px rgba(32, 107, 196, 0.4) !important;
    }
    
    /* 汉堡图标样式 */
    .navbar-toggler-icon {
        width: 24px !important;
        height: 18px !important;
        position: relative !important;
        background-image: none !important;
        display: flex !important;
        flex-direction: column !important;
        justify-content: space-between !important;
    }
    
    .navbar-toggler-icon::before,
    .navbar-toggler-icon::after,
    .navbar-toggler-middle {
        content: '';
        display: block !important;
        width: 100% !important;
        height: 3px !important;
        background: white !important;
        border-radius: 3px !important;
        transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55) !important;
    }
    
    .navbar-toggler-icon::before {
        position: absolute;
        top: 0;
        left: 0;
    }
    
    .navbar-toggler-middle {
        position: absolute;
        top: 50%;
        left: 0;
        transform: translateY(-50%);
    }
    
    .navbar-toggler-icon::after {
        position: absolute;
        bottom: 0;
        left: 0;
    }
    
    /* 打开状态的动画 - X形态 */
    .navbar-toggler[aria-expanded="true"] .navbar-toggler-icon::before {
        top: 50%;
        transform: translateY(-50%) rotate(45deg);
    }
    
    .navbar-toggler[aria-expanded="true"] .navbar-toggler-middle {
        opacity: 0;
        transform: translateY(-50%) scale(0);
    }
    
    .navbar-toggler[aria-expanded="true"] .navbar-toggler-icon::after {
        bottom: 50%;
        transform: translateY(50%) rotate(-45deg);
    }
    
    /* 品牌区域 */
    .navbar-brand {
        order: 2 !important;
        flex: 1 !important;
    }
    
    /* 右侧导航 */
    .navbar-nav.order-md-last {
        order: 3 !important;
    }
    
    /* 折叠菜单容器 */
    .navbar-collapse {
        order: 4 !important;
        width: 100% !important;
        margin-top: 0.5rem !important;
    }
    
    /* 导航菜单容器 */
    .navbar-collapse {
        background: rgba(255, 255, 255, 0.98) !important;
        backdrop-filter: blur(10px) !important;
        border-radius: 0.75rem !important;
        margin-top: 0.5rem !important;
        padding: 0.75rem !important;
        box-shadow: var(--shadow-lg) !important;
        border: 1px solid var(--gray-200) !important;
        max-height: 70vh !important;
        overflow-y: auto !important;
    }
    
    /* 导航链接 */
    .nav-link {
        padding: 0.75rem 1rem !important;
        margin: 0.25rem 0 !important;
        font-size: 1rem !important;
        border-radius: 0.5rem !important;
        display: flex !important;
        align-items: center !important;
        justify-content: flex-start !important;
    }
    
    /* 导航图标在移动端始终显示 */
    .nav-link-icon {
        display: inline-flex !important;
        margin-right: 0.75rem !important;
        flex-shrink: 0 !important;
    }
    
    .nav-link-icon .icon {
        width: 20px !important;
        height: 20px !important;
    }
    
    /* 导航标题 */
    .nav-link-title {
        flex: 1 !important;
        text-align: left !important;
    }
    
    /* 下拉菜单 */
    .dropdown-menu {
        position: static !important;
        float: none !important;
        width: 100% !important;
        margin: 0.5rem 0 !important;
        border-radius: 0.5rem !important;
        box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.05) !important;
        background: var(--gray-50) !important;
        overflow: visible !important;
    }
    
    /* 移动端禁用多列布局 */
    .dropdown-menu-columns,
    .dropdown-menu-columns-2 {
        column-count: 1 !important;
        columns: 1 !important;
    }
    
    /* 下拉菜单项 */
    .dropdown-item {
        padding: 0.75rem 1rem !important;
        font-size: 0.9375rem !important;
        position: relative !important;
        display: flex !important;
        align-items: center !important;
        border-radius: 0.5rem !important;
        overflow: visible !important;
        break-inside: avoid !important;
        page-break-inside: avoid !important;
        width: 100% !important;
        box-sizing: border-box !important;
    }
    
    /* 移动端隐藏下拉菜单图标 */
    .dropdown-menu .dropdown-item svg,
    .dropdown-menu .dropdown-item .icon,
    .dropdown-menu .dropdown-item .dropdown-item-icon {
        display: none !important;
    }
    
    /* 下拉菜单项调整 */
    .dropdown-item {
        padding: 0.875rem 1rem !important;
    }
    
    /* 下拉切换箭头 */
    .dropdown-toggle::after {
        margin-left: auto !important;
        transition: var(--transition-fast) !important;
    }
    
    /* 展开状态 */
    .nav-item.show .dropdown-toggle::after {
        transform: rotate(180deg) !important;
    }
    
    /* 容器优化 */
    .container-xl {
        padding-left: 0.75rem !important;
        padding-right: 0.75rem !important;
    }
    
    /* 导航项间距 */
    .nav-item {
        margin: 0.125rem 0 !important;
    }
    
    /* 品牌区域 */
    .navbar-brand {
        font-size: 1.125rem !important;
        padding: 0.5rem 0.75rem !important;
    }
    
    .navbar-brand-image {
        height: 32px !important;
        width: auto !important;
    }
    
    /* 用户头像 */
    .avatar {
        width: 32px !important;
        height: 32px !important;
        font-size: 0.875rem !important;
    }
    
    /* 移除悬停效果的位移（移动端不需要） */
    .nav-link:hover {
        transform: none !important;
    }
    
    .dropdown-item:hover {
        transform: none !important;
    }
    
    /* 徽章优化 */
    .badge {
        font-size: 0.7rem !important;
        padding: 0.2rem 0.4rem !important;
    }
    
    /* 菜单栏中的用户区域在移动端 */
    #navbar-menu .navbar-nav .nav-item.ml-auto {
        width: 100%;
        justify-content: flex-end;
        border-top: 1px solid var(--gray-200);
        padding-top: 0.5rem;
        margin-top: 0.5rem;
    }
    
    /* 用户下拉菜单在移动端的优化 */
    #navbar-menu .nav-item.dropdown .dropdown-menu {
        position: static !important;
        width: 100% !important;
        max-width: 100% !important;
        margin-top: 0.5rem !important;
        box-shadow: none !important;
        border: 1px solid var(--gray-200) !important;
    }
    
    /* 头像区域在移动端 */
    .avatar {
        width: 36px !important;
        height: 36px !important;
        font-size: 0.9375rem !important;
    }
    
    /* 确保移动端下拉菜单显示 */
    .navbar-nav .dropdown-menu.show {
        display: block !important;
    }
}

/* ===================================
   !!! 紧急修复：用户下拉菜单层级
   放在文件最后以确保最高优先级
   =================================== */



/* 平板端优化 (768px - 991px) */
@media (min-width: 768px) and (max-width: 991px) {
    .navbar {
        padding: 0.625rem 1rem !important;
    }
    
    .nav-link {
        padding: 0.625rem 0.875rem !important;
        font-size: 0.9375rem !important;
        margin: 0 0.125rem !important;
    }
    
    .nav-link-icon .icon {
        width: 20px !important;
        height: 20px !important;
    }
    
    .dropdown-menu {
        min-width: 200px !important;
    }
    
    .dropdown-item {
        padding: 0.5rem 0.875rem !important;
        font-size: 0.9375rem !important;
    }
}

/* 桌面端优化 (≥992px) */
@media (min-width: 992px) {
    /* 保持原有桌面端样式 */
    .nav-link-icon {
        margin-right: 0.5rem !important;
    }
    
    .dropdown-menu {
        min-width: 220px !important;
    }
}

/* 超大屏幕优化 (≥1400px) */
@media (min-width: 1400px) {
    .container-xl {
        max-width: 1320px !important;
    }
    
    .nav-link {
        padding: 0.625rem 1.125rem !important;
    }
}

/* ===================================
   主菜单容器优化
   =================================== */
.navbar-collapse {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 0.75rem;
    margin-top: 0.5rem;
    padding: 0.5rem;
}

@media (min-width: 768px) {
    .navbar-collapse {
        background: transparent;
        backdrop-filter: none;
        border-radius: 0;
        margin-top: 0;
        padding: 0;
    }
}

/* ===================================
   导航切换按钮优化
   =================================== */
.navbar-toggler {
    border: 2px solid var(--gray-300) !important;
    border-radius: 0.5rem !important;
    padding: 0.625rem 0.875rem !important;
    transition: var(--transition-fast);
    background: #ffffff !important;
    min-width: 44px !important;
    min-height: 44px !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
}

.navbar-toggler:hover {
    background: var(--primary-50) !important;
    border-color: var(--primary-500) !important;
    transform: scale(1.05);
}

.navbar-toggler:focus {
    box-shadow: 0 0 0 0.25rem rgba(32, 107, 196, 0.25) !important;
    outline: none !important;
}

.navbar-toggler:active {
    background: var(--primary-100) !important;
    transform: scale(0.95);
}

.navbar-toggler-icon {
    width: 1.25rem !important;
    height: 1.25rem !important;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(32, 107, 196, 0.8)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2.5' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e") !important;
}

/* ===================================
   通知图标优化
   =================================== */
.nav-link .icon {
    transition: var(--transition-fast);
}

.nav-link:hover .icon {
    transform: scale(1.1);
}

/* 通知徽章位置优化 */
.badge.bg-red {
    position: absolute;
    top: -4px;
    right: -4px;
    width: 10px;
    height: 10px;
    padding: 0;
    border-radius: 50%;
    border: 2px solid #ffffff;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.7);
    }
    50% {
        box-shadow: 0 0 0 6px rgba(239, 68, 68, 0);
    }
}

/* ===================================
   内容区域优化
   =================================== */
.page {
    background: var(--gray-50);
}

.container-xl {
    transition: var(--transition-base);
}

/* ===================================
   警告提示优化
   =================================== */
.alert {
    border-radius: 0.75rem;
    border: 1px solid;
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
}

.alert:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.alert-warning {
    background: var(--warning-light) !important;
    border-color: var(--warning) !important;
    color: var(--gray-900) !important;
}

.alert-title {
    color: var(--warning-dark);
    font-weight: 600;
}

/* ===================================
   卡片优化
   =================================== */
.card {
    background: var(--gradient-card);
    border: 1px solid var(--gray-200);
    border-radius: 0.75rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
}

.card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

/* ===================================
   按钮优化
   =================================== */
.btn-primary {
    background: var(--gradient-primary) !important;
    border: none !important;
    box-shadow: 0 4px 12px rgba(32, 107, 196, 0.3);
    transition: var(--transition-base);
    font-weight: 600;
}

.btn-primary:hover {
    background: var(--gradient-hover) !important;
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(32, 107, 196, 0.4);
}

.btn-primary:active {
    transform: translateY(0);
}

/* ===================================
   平滑滚动
   =================================== */
html {
    scroll-behavior: smooth;
}

/* ===================================
   自定义滚动条
   =================================== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--gray-100);
}

::-webkit-scrollbar-thumb {
    background: var(--gray-300);
    border-radius: 4px;
    transition: var(--transition-fast);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-500);
}

/* ===================================
   聚焦效果优化
   =================================== */
*:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(32, 107, 196, 0.2);
    border-radius: 0.5rem;
}

/* ===================================
   文字选择优化
   =================================== */
::selection {
    background: var(--primary-200);
    color: var(--gray-900);
}

::-moz-selection {
    background: var(--primary-200);
    color: var(--gray-900);
}

/* ===================================
   加载动画优化
   =================================== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.navbar,
.nav-item {
    animation: fadeIn 0.5s ease;
}

/* ===================================
   提升整体视觉层次
   =================================== */
.navbar-nav {
    gap: 0.25rem;
}

/* 分隔线优化 */
.dropdown-divider {
    border-top: 1px solid var(--gray-200);
    margin: 0.5rem 0;
}

/* ===================================
   触摸设备优化
   =================================== */
@media (hover: none) and (pointer: coarse) {
    /* 触摸设备专用样式 */
    .nav-link,
    .dropdown-item,
    .btn {
        -webkit-tap-highlight-color: rgba(32, 107, 196, 0.1);
        cursor: pointer;
    }
    
    /* 增加触摸目标尺寸 */
    .nav-link {
        min-height: 44px !important;
        padding-top: 0.75rem !important;
        padding-bottom: 0.75rem !important;
    }
    
    .dropdown-item {
        min-height: 44px !important;
        padding-top: 0.75rem !important;
        padding-bottom: 0.75rem !important;
    }
    
    /* 移除悬停动画（触摸设备不需要） */
    .nav-link:hover,
    .dropdown-item:hover {
        transform: none !important;
    }
    
    /* 优化点击反馈 */
    .nav-link:active {
        background: var(--primary-100) !important;
        transform: scale(0.98) !important;
    }
    
    .dropdown-item:active {
        background: var(--primary-100) !important;
        transform: scale(0.98) !important;
    }
}

/* ===================================
   小屏幕额外优化 (<576px)
   =================================== */
@media (max-width: 575px) {
    /* 进一步优化超小屏幕 */
    .navbar-brand {
        font-size: 1rem !important;
    }
    
    .nav-link {
        font-size: 0.9375rem !important;
    }
    
    .dropdown-item {
        font-size: 0.875rem !important;
        padding: 0.75rem 1rem !important;
    }
    
    /* 小屏幕也隐藏图标 */
    .dropdown-menu .dropdown-item svg,
    .dropdown-menu .dropdown-item .icon,
    .dropdown-menu .dropdown-item .dropdown-item-icon {
        display: none !important;
    }
}

/* ===================================
   打印样式优化
   =================================== */
@media print {
    .navbar,
    .navbar-collapse,
    .dropdown-menu {
        display: none !important;
    }
}