/* 现代化全局样式 */
:root {
    /* 主色调 - 柔和渐变色 */
    --primary-color: #667eea;
    --primary-light: #764ba2;
    --secondary-color: #8b9dc3;
    --success-color: #4ade80;
    --info-color: #38bdf8;
    --warning-color: #fbbf24;
    --danger-color: #f87171;
    
    /* 中性色系 */
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    /* 背景色 */
    --bg-primary: #ffffff;
    --bg-secondary: var(--gray-50);
    --bg-tertiary: var(--gray-100);
    
    /* 阴影 */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* 圆角 */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    
    /* 间距 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
}

* {
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--gray-100) 100%);
    color: var(--gray-800);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 现代化登录页面 */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    position: relative;
    overflow: hidden;
}

.login-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><defs><pattern id="grid" width="50" height="50" patternUnits="userSpaceOnUse"><path d="M 50 0 L 0 0 0 50" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="1"/></pattern></defs><rect width="100%" height="100%" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.login-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    padding: var(--spacing-2xl);
    width: 100%;
    max-width: 420px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    animation: slideUp 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
    z-index: 1;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(40px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.login-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.login-header h2 {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 600;
    font-size: 1.75rem;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.025em;
}

.login-header i {
    font-size: 1.75rem;
    margin-right: var(--spacing-sm);
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.login-header p {
    color: var(--gray-600);
    font-size: 0.95rem;
    margin: 0;
}

/* 现代化侧边栏 */
.sidebar {
    position: fixed;
    top: 80px;
    bottom: 0;
    left: 0;
    width: 280px;
    z-index: 100;
    background: var(--bg-primary);
    border-right: 1px solid var(--gray-200);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-xl) 0;
    transition: top 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.sidebar.navbar-compact {
    top: 60px;
}

.sidebar.navbar-hidden {
    top: 0;
}

.sidebar .nav {
    padding: 0 var(--spacing-lg);
}

.sidebar .nav-link {
    font-weight: 500;
    color: var(--gray-700);
    padding: var(--spacing-md) var(--spacing-lg);
    margin: var(--spacing-xs) 0;
    border-radius: var(--radius-lg);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    text-decoration: none;
}

.sidebar .nav-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    opacity: 0;
    transition: opacity 0.3s ease;
    border-radius: var(--radius-lg);
}

.sidebar .nav-link:hover {
    color: var(--primary-color);
    background-color: var(--gray-50);
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
}

.sidebar .nav-link:hover::before {
    opacity: 0.05;
}

.sidebar .nav-link.active {
    color: var(--primary-color);
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(118, 75, 162, 0.1));
    font-weight: 600;
    box-shadow: var(--shadow-md);
}

.sidebar .nav-link.active::before {
    opacity: 0.1;
}

.sidebar .nav-link i {
    margin-right: var(--spacing-md);
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    position: relative;
    z-index: 1;
}

/* 子菜单项样式 */
.sidebar .nav-item-sub {
    margin-left: 1.5rem;
    position: relative;
}

.sidebar .nav-item-sub::before {
    content: '';
    position: absolute;
    left: 0.75rem;
    top: -1rem;
    bottom: 0;
    width: 2px;
    background: var(--gray-300);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.sidebar .nav-item-sub:hover::before {
    opacity: 1;
}

.sidebar .nav-link-sub {
    font-size: 0.95rem;
    font-weight: 400;
    padding-left: 1.5rem;
    color: var(--gray-600);
}

.sidebar .nav-link-sub i {
    font-size: 1rem;
    width: 18px;
}

.sidebar .nav-link-sub:hover {
    color: var(--primary-color);
    background-color: rgba(102, 126, 234, 0.05);
    transform: translateX(4px);
}

.sidebar .nav-link-sub.active {
    color: var(--primary-color);
    background: rgba(102, 126, 234, 0.1);
    font-weight: 500;
}

/* 现代化主内容区域 */
main {
    margin-left: 280px;
    margin-top: 80px;
    padding: var(--spacing-xl);
    padding-top: var(--spacing-2xl); /* 增加顶部内边距，避免被导航栏遮挡 */
    min-height: calc(100vh - 80px);
    background: var(--bg-secondary);
    transition: margin-top 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

main.navbar-compact {
    margin-top: 60px;
    min-height: calc(100vh - 60px);
}

main.navbar-hidden {
    margin-top: 0;
    min-height: 100vh;
}

.page-content {
    animation: fadeInUp 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 页面标题区域 */
.border-bottom {
    border-bottom: 2px solid var(--gray-200) !important;
    padding-bottom: var(--spacing-lg) !important;
    margin-bottom: var(--spacing-xl) !important;
    padding-top: var(--spacing-lg) !important;
    position: relative;
}

/* 确保页面顶部按钮不被遮挡 */
.btn-toolbar {
    position: relative;
    z-index: 10;
}

/* 页面内容安全区域 */
.page-content {
    animation: fadeInUp 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
    z-index: 1;
}

/* 顶部操作按钮区域 */
.d-flex.justify-content-between {
    position: relative;
    z-index: 10;
    margin-top: var(--spacing-sm);
}

.h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--gray-900);
    letter-spacing: -0.025em;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.h2 i {
    font-size: 1.75rem;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* 现代化导航栏 */
.modern-navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 80px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--gray-200);
    z-index: 1000;
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.3s ease;
}

.modern-navbar.navbar-hidden {
    transform: translateY(-100%);
    opacity: 0;
}

.modern-navbar.navbar-compact {
    height: 60px;
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-md);
}

.modern-navbar.navbar-compact .brand-icon {
    width: 36px;
    height: 36px;
    font-size: 1.2rem;
}

.modern-navbar.navbar-compact .brand-text h1 {
    font-size: 1.25rem;
}

.modern-navbar.navbar-compact .user-avatar {
    width: 32px;
    height: 32px;
    font-size: 1rem;
}

.navbar-content {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-xl);
    max-width: 100%;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    text-decoration: none;
}

.brand-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    box-shadow: var(--shadow-md);
}

.brand-text h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-900);
    margin: 0;
    letter-spacing: -0.025em;
}

.brand-subtitle {
    font-size: 0.75rem;
    color: var(--gray-500);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 500;
}

.navbar-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.search-box {
    position: relative;
    display: flex;
    align-items: center;
}

.search-box i {
    position: absolute;
    left: var(--spacing-md);
    color: var(--gray-400);
    z-index: 1;
}

.search-box input {
    background: var(--gray-100);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: var(--spacing-sm) var(--spacing-md) var(--spacing-sm) 2.5rem;
    width: 280px;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.search-box input:focus {
    outline: none;
    background: var(--bg-primary);
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
    width: 320px;
}

.user-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all 0.3s ease;
}

.user-menu:hover {
    background: var(--gray-100);
    box-shadow: var(--shadow-md);
}

.user-avatar {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
}

.user-info {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.user-name {
    font-weight: 600;
    color: var(--gray-900);
    font-size: 0.9rem;
}

.user-role {
    font-size: 0.75rem;
    color: var(--gray-500);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.mobile-menu-toggle {
    background: none;
    border: none;
    color: var(--gray-700);
    font-size: 1.5rem;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
}

.mobile-menu-toggle:hover {
    background: var(--gray-100);
    color: var(--primary-color);
}

/* 移动端遮罩层 */
.mobile-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.mobile-overlay.show {
    opacity: 1;
    visibility: visible;
}

/* 快速显示导航栏按钮 */
.show-navbar-btn {
    position: fixed;
    top: 10px;
    right: 20px;
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: white;
    border: none;
    border-radius: 50%;
    box-shadow: var(--shadow-lg);
    z-index: 1001;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    animation: pulse 2s infinite;
}

.show-navbar-btn:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-xl);
}

@keyframes pulse {
    0%, 100% {
        box-shadow: var(--shadow-lg);
    }
    50% {
        box-shadow: 0 0 0 8px rgba(102, 126, 234, 0.2), var(--shadow-lg);
    }
}

/* 导航栏提示 */
.navbar-hint {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: var(--spacing-lg) var(--spacing-xl);
    border-radius: var(--radius-xl);
    font-size: 0.9rem;
    font-weight: 500;
    z-index: 1002;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    animation: hintFadeIn 0.3s ease-out;
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-xl);
}

.navbar-hint i {
    font-size: 1.1rem;
    animation: bounce 1s infinite;
}

@keyframes hintFadeIn {
    from {
        opacity: 0;
        transform: translate(-50%, -50%) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translate(-50%, -50%) scale(1);
    }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-4px);
    }
    60% {
        transform: translateY(-2px);
    }
}

/* 现代化卡片样式 */
.card {
    background: var(--bg-primary);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
    animation: cardFadeIn 0.5s ease-out;
}

@keyframes cardFadeIn {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.card:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: var(--shadow-xl);
    border-color: var(--gray-300);
}

.card-header {
    background: linear-gradient(135deg, var(--gray-50), var(--bg-primary));
    border-bottom: 1px solid var(--gray-200);
    padding: var(--spacing-lg) var(--spacing-xl);
    font-weight: 600;
    color: var(--gray-800);
}

.card-body {
    padding: var(--spacing-xl);
}

/* 统计卡片特殊样式 */
.border-left-primary {
    border-left: 4px solid var(--primary-color) !important;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05), rgba(118, 75, 162, 0.05));
}

.border-left-success {
    border-left: 4px solid var(--success-color) !important;
    background: linear-gradient(135deg, rgba(74, 222, 128, 0.05), rgba(34, 197, 94, 0.05));
}

.border-left-info {
    border-left: 4px solid var(--info-color) !important;
    background: linear-gradient(135deg, rgba(56, 189, 248, 0.05), rgba(14, 165, 233, 0.05));
}

.border-left-warning {
    border-left: 4px solid var(--warning-color) !important;
    background: linear-gradient(135deg, rgba(251, 191, 36, 0.05), rgba(245, 158, 11, 0.05));
}

/* 表格样式 */
.table {
    border-radius: 0.5rem;
    overflow: hidden;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
}

.table thead th {
    background-color: var(--primary-color);
    color: white;
    font-weight: 600;
    border: none;
    padding: 1rem;
}

.table tbody td {
    padding: 0.75rem 1rem;
    vertical-align: middle;
    border-color: #e9ecef;
}

.table tbody tr:hover {
    background-color: rgba(13, 110, 253, 0.05);
}

/* 现代化按钮样式 */
.btn {
    border-radius: var(--radius-lg);
    font-weight: 600;
    padding: var(--spacing-md) var(--spacing-lg);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: none;
    font-size: 0.9rem;
    letter-spacing: 0.025em;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.btn:hover::before {
    left: 100%;
}

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

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

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    background: linear-gradient(135deg, #5a6fd8, #6b63c4);
    color: white;
}

.btn-success {
    background: linear-gradient(135deg, var(--success-color), #22c55e);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-info {
    background: linear-gradient(135deg, var(--info-color), #0ea5e9);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-warning {
    background: linear-gradient(135deg, var(--warning-color), #f59e0b);
    color: var(--gray-900);
    box-shadow: var(--shadow-md);
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger-color), #ef4444);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-outline-primary {
    background: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
}

.btn-outline-primary:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

.btn-sm {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.8rem;
    border-radius: var(--radius-md);
}

/* 现代化图表样式 */
.modern-chart-card {
    background: var(--bg-primary);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-lg);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.modern-chart-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.chart-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.chart-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--gray-800);
    margin: 0;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.chart-title i {
    font-size: 1rem;
    color: var(--primary-color);
}

.chart-actions {
    display: flex;
    gap: var(--spacing-sm);
}

/* 现代化表格样式 */
.table {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    background: var(--bg-primary);
    margin-bottom: 0;
}

.table thead th {
    background: linear-gradient(135deg, var(--gray-100), var(--gray-50));
    color: var(--gray-800);
    font-weight: 600;
    border: none;
    padding: var(--spacing-lg);
    font-size: 0.9rem;
    letter-spacing: 0.025em;
    text-transform: uppercase;
}

.table tbody td {
    padding: var(--spacing-lg);
    vertical-align: middle;
    border-color: var(--gray-100);
    color: var(--gray-700);
}

.table tbody tr {
    transition: all 0.2s ease;
}

.table tbody tr:hover {
    background: linear-gradient(135deg, var(--gray-50), rgba(102, 126, 234, 0.02));
    transform: scale(1.01);
}

.table-responsive {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

/* 徽章样式 */
.badge {
    font-weight: 500;
    padding: 0.5em 0.75em;
}

/* 状态颜色 */
.status-pending {
    background-color: var(--warning-color);
    color: #000;
}

.status-processing {
    background-color: var(--info-color);
    color: #000;
}

.status-shipped {
    background-color: var(--primary-color);
}

.status-delivered {
    background-color: var(--success-color);
}

.status-cancelled {
    background-color: var(--danger-color);
}

/* 搜索和筛选区域 */
.filter-section {
    background: white;
    border-radius: 0.75rem;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

/* 分页样式 */
.pagination {
    margin-bottom: 0;
}

.page-link {
    border-radius: 0.5rem;
    margin: 0 0.125rem;
    border: 1px solid #dee2e6;
    color: var(--primary-color);
}

.page-link:hover {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.page-item.active .page-link {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

/* 模态框样式 */
.modal-content {
    border-radius: 0.75rem;
    border: none;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
}

.modal-header {
    border-bottom: 1px solid #e9ecef;
    padding: 1.5rem;
}

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    border-top: 1px solid #e9ecef;
    padding: 1.5rem;
}

/* 加载指示器 */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

/* 现代化表单样式 */
.form-control {
    border-radius: var(--radius-lg);
    border: 2px solid var(--gray-200);
    padding: var(--spacing-md) var(--spacing-lg);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    background: var(--bg-primary);
    color: var(--gray-800);
    font-size: 0.95rem;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
    outline: none;
    transform: translateY(-1px);
}

.form-control:hover {
    border-color: var(--gray-300);
}

.form-select {
    border-radius: var(--radius-lg);
    border: 2px solid var(--gray-200);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-primary);
    transition: all 0.3s ease;
}

.form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
}

.form-label {
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: var(--spacing-sm);
    font-size: 0.9rem;
    letter-spacing: 0.025em;
}

.form-text {
    color: var(--gray-500);
    font-size: 0.85rem;
    margin-top: var(--spacing-xs);
}

.input-group {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.input-group-text {
    background: var(--gray-100);
    border: 2px solid var(--gray-200);
    color: var(--gray-600);
    font-weight: 500;
}

/* 现代化模态框 */
.modal-content {
    border-radius: var(--radius-2xl);
    border: none;
    box-shadow: var(--shadow-xl);
    backdrop-filter: blur(20px);
}

.modal-header {
    background: linear-gradient(135deg, var(--gray-50), var(--bg-primary));
    border-bottom: 1px solid var(--gray-200);
    padding: var(--spacing-xl);
    border-radius: var(--radius-2xl) var(--radius-2xl) 0 0;
}

.modal-title {
    font-weight: 700;
    color: var(--gray-900);
    font-size: 1.25rem;
}

.modal-body {
    padding: var(--spacing-xl);
}

.modal-footer {
    background: var(--gray-50);
    border-top: 1px solid var(--gray-200);
    padding: var(--spacing-xl);
    border-radius: 0 0 var(--radius-2xl) var(--radius-2xl);
}

/* 现代化响应式设计 */
@media (max-width: 1024px) {
    .sidebar {
        width: 260px;
    }
    
    main {
        margin-left: 260px;
    }
    
    .search-box input {
        width: 200px;
    }
    
    .search-box input:focus {
        width: 240px;
    }
}

@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        left: -280px;
        width: 280px;
        transition: left 0.3s ease;
        z-index: 1001;
    }
    
    .sidebar.show {
        left: 0;
    }
    
    main {
        margin-left: 0;
        margin-top: 80px;
        padding: var(--spacing-md);
        padding-top: var(--spacing-xl); /* 移动端也需要足够的顶部间距 */
    }
    
    .modern-navbar {
        padding: 0 var(--spacing-md);
    }
    
    .navbar-content {
        padding: 0;
    }
    
    .search-box {
        display: none;
    }
    
    .user-info {
        display: none;
    }
    
    .brand-text h1 {
        font-size: 1.25rem;
    }
    
    .brand-subtitle {
        display: none;
    }
    
    .login-card {
        margin: var(--spacing-md);
        padding: var(--spacing-xl);
        max-width: none;
    }
    
    .card-body {
        padding: var(--spacing-lg);
    }
    
    .table-responsive {
        font-size: 0.85rem;
    }
    
    .btn {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 0.85rem;
    }
    
    .h2 {
        font-size: 1.5rem;
    }
    
    /* 移动端图表调整 */
    .modern-chart-card .card-body {
        padding: var(--spacing-md);
    }
    
    #salesChart, #productChart, #profitChart, #categoryChart {
        height: 250px !important;
    }
}

@media (max-width: 480px) {
    main {
        padding: var(--spacing-sm);
    }
    
    .card-body {
        padding: var(--spacing-md);
    }
    
    .btn {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: 0.8rem;
    }
    
    .h2 {
        font-size: 1.25rem;
    }
    
    .modern-navbar {
        height: 70px;
    }
    
    .sidebar {
        top: 70px;
    }
    
    main {
        margin-top: 70px;
    }
}

/* 工具提示样式 */
.tooltip {
    font-size: 0.875rem;
}

/* 进度条样式 */
.progress {
    height: 0.5rem;
    border-radius: 0.25rem;
}

/* 警告框样式 */
.alert {
    border-radius: 0.5rem;
    border: none;
    padding: 1rem 1.25rem;
}

.alert-dismissible .btn-close {
    padding: 1.25rem 1rem;
}

/* 图标样式 */
.bi {
    vertical-align: -0.125em;
}

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

::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #a8a8a8;
}

/* 动画效果 */
.fade-in {
    animation: fadeIn 0.5s ease-in;
}

.slide-up {
    animation: slideUp 0.5s ease-out;
}

/* 打印样式 */
@media print {
    .sidebar,
    .navbar,
    .btn,
    .pagination {
        display: none !important;
    }
    
    main {
        padding: 0 !important;
        margin: 0 !important;
    }
    
    .card {
        border: 1px solid #000 !important;
        box-shadow: none !important;
    }
}

/* ==================== 商品增强功能样式 ==================== */

/* 图片上传区域 */
.image-upload-area {
    margin-bottom: var(--spacing-lg);
}

.upload-zone {
    border: 2px dashed var(--gray-300);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: var(--bg-primary);
    min-height: 150px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.upload-zone:hover {
    border-color: var(--primary-color);
    background: rgba(102, 126, 234, 0.05);
    transform: translateY(-2px);
}

.upload-content {
    color: var(--gray-600);
}

.upload-content i {
    color: var(--gray-400);
    margin-bottom: var(--spacing-md);
}

.upload-zone:hover .upload-content i {
    color: var(--primary-color);
}

/* 已上传图片展示 */
.uploaded-images {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.uploaded-image-item {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--bg-primary);
    border: 2px solid var(--gray-200);
    transition: all 0.3s ease;
}

.uploaded-image-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.uploaded-image-item.main-image {
    border-color: var(--warning-color);
    box-shadow: 0 0 0 3px rgba(251, 191, 36, 0.2);
}

.uploaded-image-item.main-image::before {
    content: "主图";
    position: absolute;
    top: 5px;
    left: 5px;
    background: var(--warning-color);
    color: white;
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    font-size: 0.7rem;
    font-weight: 600;
    z-index: 2;
}

.image-preview {
    position: relative;
    width: 100%;
    height: 120px;
    overflow: hidden;
}

.image-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.uploaded-image-item:hover .image-preview img {
    transform: scale(1.05);
}

.image-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.uploaded-image-item:hover .image-overlay {
    opacity: 1;
}

.image-info {
    padding: var(--spacing-sm);
    text-align: center;
}

.image-info small {
    display: block;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* 属性管理 */
.attribute-manager {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    border: 1px solid var(--gray-200);
}

.attribute-row {
    background: var(--bg-secondary);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
    transition: all 0.3s ease;
}

.attribute-row:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-sm);
}

/* 规格管理 */
.spec-manager {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    border: 1px solid var(--gray-200);
}

.spec-group {
    background: var(--bg-secondary);
    border: 1px solid var(--gray-300) !important;
    transition: all 0.3s ease;
}

.spec-group:hover {
    border-color: var(--primary-color) !important;
    box-shadow: var(--shadow-md);
}

.spec-value-row {
    background: var(--bg-primary);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
    transition: all 0.3s ease;
}

.spec-value-row:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.spec-image-upload {
    position: relative;
}

.spec-image-preview {
    min-height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.spec-preview-img {
    max-width: 100%;
    max-height: 40px;
    border-radius: var(--radius-md);
    object-fit: cover;
    border: 1px solid var(--gray-300);
}

/* 上传进度 */
.upload-progress {
    background: var(--info-color);
    color: white;
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    text-align: center;
}

/* 增强的模态框样式 */
.modal-xl {
    max-width: 90vw;
}

.modal-body {
    max-height: 70vh;
    overflow-y: auto;
}

/* Tab样式增强 */
.nav-tabs {
    border-bottom: 2px solid var(--gray-200);
    margin-bottom: var(--spacing-xl);
}

.nav-tabs .nav-link {
    border: none;
    border-bottom: 3px solid transparent;
    color: var(--gray-600);
    font-weight: 600;
    padding: var(--spacing-md) var(--spacing-lg);
    transition: all 0.3s ease;
}

.nav-tabs .nav-link:hover {
    border-bottom-color: var(--primary-light);
    color: var(--primary-color);
}

.nav-tabs .nav-link.active {
    border-bottom-color: var(--primary-color);
    color: var(--primary-color);
    background: none;
}

/* 响应式优化 */
@media (max-width: 768px) {
    .uploaded-images {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
        gap: var(--spacing-sm);
    }
    
    .image-preview {
        height: 100px;
    }
    
    .spec-value-row .row {
        flex-direction: column;
    }
    
    .spec-value-row .col-3,
    .spec-value-row .col-2 {
        width: 100%;
        margin-bottom: var(--spacing-sm);
    }
    
    .attribute-row .row {
        flex-direction: column;
    }
    
    .attribute-row .col-4,
    .attribute-row .col-6,
    .attribute-row .col-2 {
        width: 100%;
        margin-bottom: var(--spacing-sm);
    }
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.attribute-row,
.spec-value-row,
.uploaded-image-item {
    animation: fadeInUp 0.3s ease-out;
}

/* 拖拽排序样式 */
.sortable-ghost {
    opacity: 0.5;
}

.sortable-chosen {
    transform: scale(1.02);
    box-shadow: var(--shadow-lg);
}

/* 模态框可访问性修复 */
.modal.show {
    /* 强制确保模态框可见 */
    display: block !important;
}

.modal.show[aria-hidden="true"] {
    /* 如果Bootstrap意外设置了aria-hidden，通过CSS确保可见性和可访问性 */
    display: block !important;
    opacity: 1 !important;
    visibility: visible !important;
    /* 移除aria-hidden的语义影响 */
    pointer-events: auto !important;
}

/* 确保模态框中的焦点元素始终可见和可访问 */
.modal.show *:focus,
.modal.show button:focus,
.modal.show input:focus,
.modal.show select:focus,
.modal.show textarea:focus {
    outline: 2px solid var(--primary-color) !important;
    outline-offset: 2px !important;
    z-index: 9999 !important;
    /* 确保焦点元素不被aria-hidden影响 */
    visibility: visible !important;
    opacity: 1 !important;
}

/* 模态框动画优化 - 减少可能导致aria-hidden冲突的过渡效果 */
.modal.fade .modal-dialog {
    transition: transform 0.15s ease-out;
}

.modal.show .modal-dialog {
    transform: none;
}

/* 强制移除可能的aria-hidden样式影响 */
.modal[aria-hidden="true"].show,
.modal[aria-hidden="true"].show * {
    /* 覆盖任何可能由aria-hidden引起的隐藏效果 */
    display: block !important;
    visibility: visible !important;
    opacity: 1 !important;
}

/* 确保模态框背景不会阻止交互 */
.modal-backdrop.show {
    opacity: 0.5;
    pointer-events: auto;
}

/* 调试样式 - 在开发环境中高亮有问题的元素 */
.modal[aria-hidden="true"].show::before {
    content: "⚠️ ARIA-HIDDEN 冲突检测";
    position: absolute;
    top: 10px;
    right: 10px;
    background: #ff6b6b;
    color: white;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    z-index: 10000;
    display: none; /* 生产环境中隐藏 */
}