/* ===== 响应式设计 ===== */

/* 平板设备 (max-width: 1024px) */
@media (max-width: 1024px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .meetings-grid,
    .members-grid,
    .resources-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    }
}

/* 移动设备 (max-width: 768px) */
@media (max-width: 768px) {
    /* 头部导航 */
    .nav-menu {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--card-background);
        flex-direction: column;
        padding: 16px;
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-item {
        padding: 12px 16px;
        border-radius: var(--radius-md);
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .mobile-menu-btn.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .mobile-menu-btn.active span:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-menu-btn.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }
    
    /* 首页 */
    .hero {
        padding: 32px 16px;
    }
    
    .hero h2 {
        font-size: 24px;
    }
    
    .hero p {
        font-size: 14px;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    .stat-card {
        padding: 16px;
    }
    
    .stat-icon {
        font-size: 32px;
    }
    
    .stat-content h3 {
        font-size: 24px;
    }
    
    .action-buttons {
        grid-template-columns: 1fr;
    }
    
    /* 页面头部 */
    .page-header {
        flex-direction: column;
        align-items: stretch;
        gap: 16px;
    }
    
    .page-header h2 {
        font-size: 20px;
    }
    
    /* 筛选器 */
    .filters {
        flex-direction: column;
    }
    
    .filters select,
    .filters input {
        width: 100%;
        max-width: none;
    }
    
    /* 卡片网格 */
    .meetings-grid,
    .members-grid,
    .resources-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    /* 标签页 */
    .summary-tabs,
    .resource-categories {
        flex-wrap: nowrap;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        -ms-overflow-style: none;
    }
    
    .summary-tabs::-webkit-scrollbar,
    .resource-categories::-webkit-scrollbar {
        display: none;
    }
    
    .tab-btn,
    .category-btn {
        flex-shrink: 0;
    }
    
    /* 模态框 */
    .modal {
        width: 95%;
        max-height: 85vh;
        padding: 20px;
        margin: 16px;
    }
    
    .modal-header h3 {
        font-size: 18px;
    }
    
    /* 表单 */
    .feedback-form-container {
        padding: 20px;
    }
    
    .form-group input,
    .form-group select,
    .form-group textarea {
        font-size: 16px; /* 防止iOS自动缩放 */
    }
    
    /* 按钮 */
    .primary-btn,
    .secondary-btn {
        width: 100%;
        justify-content: center;
    }
    
    .card-footer {
        flex-direction: column;
    }
    
    .card-footer button {
        width: 100%;
    }
    
    /* Toast */
    .toast {
        left: 16px;
        right: 16px;
        top: auto;
        bottom: 20px;
    }
}

/* 小屏手机 (max-width: 480px) */
@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    .header-container {
        padding: 0 16px;
        height: 56px;
    }
    
    .logo h1 {
        font-size: 18px;
    }
    
    .logo .subtitle {
        font-size: 11px;
    }
    
    .main-content {
        padding-top: 16px;
        padding-bottom: 32px;
    }
    
    .hero {
        padding: 24px 12px;
    }
    
    .hero h2 {
        font-size: 20px;
    }
    
    .quick-actions,
    .recent-activity {
        padding: 16px;
    }
    
    .quick-actions h3,
    .recent-activity h3 {
        font-size: 16px;
    }
    
    .activity-item {
        padding: 10px;
    }
    
    .activity-icon {
        font-size: 20px;
    }
    
    .card {
        padding: 16px;
    }
    
    .card-title {
        font-size: 15px;
    }
    
    .footer {
        padding: 16px 0;
    }
    
    .footer p {
        font-size: 12px;
    }
}

/* 打印样式 */
@media print {
    .header,
    .footer,
    .mobile-menu-btn,
    .primary-btn,
    .secondary-btn,
    .filters,
    .card-footer {
        display: none !important;
    }
    
    .main-content {
        padding-top: 0;
        padding-bottom: 0;
    }
    
    .page {
        display: block !important;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid var(--border-color);
        break-inside: avoid;
    }
}

/* 高对比度模式 */
@media (prefers-contrast: high) {
    :root {
        --border-color: #000;
        --text-secondary: #000;
    }
    
    .card,
    .modal,
    .toast {
        border: 2px solid var(--border-color);
    }
}

/* 减少动画模式 */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* 暗色模式支持 (可选) */
@media (prefers-color-scheme: dark) {
    /* 如需支持暗色模式，可在此添加样式 */
    /* 目前保持亮色主题 */
}

/* 触摸设备优化 */
@media (hover: none) and (pointer: coarse) {
    .nav-item {
        padding: 12px 16px;
    }
    
    .action-btn,
    .tab-btn,
    .category-btn {
        min-height: 48px;
    }
    
    input,
    select,
    textarea {
        font-size: 16px; /* 防止iOS自动缩放 */
    }
}

/* 横屏模式下的移动设备 */
@media (max-height: 500px) and (orientation: landscape) {
    .hero {
        padding: 16px;
    }
    
    .hero h2 {
        font-size: 20px;
    }
    
    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .stat-card {
        padding: 12px;
    }
    
    .stat-icon {
        font-size: 24px;
    }
    
    .stat-content h3 {
        font-size: 20px;
    }
}

/* 超宽屏幕 */
@media (min-width: 1600px) {
    .container {
        max-width: 1400px;
    }
    
    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .meetings-grid,
    .members-grid,
    .resources-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}