/* 响应式设计 */

/* 平板设备 (768px - 1024px) */
@media (max-width: 1024px) {
    .container {
        padding: 0 15px;
    }
    
    .nav-container {
        padding: 0 15px;
    }
    
    .platforms-grid {
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
        gap: 25px;
    }
    
    .page-header h1 {
        font-size: 2.2rem;
    }
    
    .nav-menu {
        gap: 20px;
    }
}

/* 小平板设备 (600px - 768px) */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: var(--surface-color);
        flex-direction: column;
        justify-content: flex-start;
        align-items: stretch;
        padding: 30px 20px;
        transition: all 0.3s ease;
        box-shadow: var(--shadow-heavy);
        z-index: 999;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-item {
        width: 100%;
        margin-bottom: 10px;
    }
    
    .nav-link {
        color: var(--text-primary);
        padding: 15px 20px;
        border-radius: 12px;
        background: var(--background-color);
        border: 1px solid var(--border-color);
        justify-content: center;
    }
    
    .nav-link:hover {
        background: var(--primary-light);
        color: var(--primary-color);
        transform: none;
    }
    
    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        background: transparent;
        margin-top: 10px;
    }
    
    .dropdown-item {
        background: var(--surface-color);
        border: 1px solid var(--border-color);
        margin-bottom: 5px;
        border-radius: 8px;
    }
    
    .hamburger {
        display: flex;
    }
    
    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    /* 移动端主题切换按钮 */
    .theme-toggle {
        position: static !important;
        margin: 15px 20px;
        width: 40px;
        height: 40px;
        background: var(--primary-color);
        color: white;
        border-radius: 10px;
        display: flex !important;
        align-items: center;
        justify-content: center;
        font-size: 1.1rem;
    }
    
    .theme-toggle:hover {
        background: var(--primary-dark);
        transform: none;
    }
    
    .platforms-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        gap: 20px;
    }
    
    .page-header h1 {
        font-size: 2rem;
    }
    
    .page-header p {
        font-size: 1rem;
    }
    
    .search-box {
        max-width: 100%;
    }
    
    .platform-card {
        border-radius: 16px;
    }
    
    .card-header {
        padding: 20px;
        flex-direction: column;
        text-align: center;
        gap: 10px;
    }
    
    .platform-logo {
        width: 50px;
        height: 50px;
    }
    
    .platform-info h3 {
        font-size: 1.2rem;
    }
    
    .card-body {
        padding: 20px;
    }
    
    .contact-info {
        justify-content: center;
    }
    
    .contact-item {
        font-size: 0.8rem;
        padding: 5px 10px;
    }
}

/* 手机设备 (320px - 600px) */
@media (max-width: 600px) {
    .nav-container {
        height: 60px;
        padding: 0 10px;
    }
    
    .nav-logo h2 {
        font-size: 1.2rem;
    }
    
    .main-content {
        margin-top: 60px;
        padding: 20px 0;
    }
    
    .container {
        padding: 0 10px;
    }
    
    .page-header {
        margin-bottom: 30px;
    }
    
    .page-header h1 {
        font-size: 1.8rem;
    }
    
    .page-header p {
        font-size: 0.9rem;
    }
    
    .search-section {
        margin-bottom: 30px;
    }
    
    .search-box input {
        padding: 12px 45px 12px 15px;
        font-size: 0.9rem;
    }
    
    .search-btn {
        width: 35px;
        height: 35px;
    }
    
    .platforms-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .platform-card {
        border-radius: 12px;
        margin: 0 5px;
    }
    
    .card-header {
        padding: 15px;
        flex-direction: row;
        text-align: left;
        gap: 12px;
    }
    
    .platform-logo {
        width: 45px;
        height: 45px;
        border-radius: 8px;
    }
    
    .platform-info h3 {
        font-size: 1.1rem;
    }
    
    .ccu-code {
        font-size: 0.8rem;
        padding: 3px 6px;
    }
    
    .card-body {
        padding: 15px;
    }
    
    .platform-description {
        font-size: 0.9rem;
        margin-bottom: 15px;
    }
    
    .detail-item {
        font-size: 0.85rem;
        gap: 8px;
    }
    
    .card-footer {
        padding: 15px;
    }
    
    .contact-info {
        gap: 8px;
        justify-content: flex-start;
    }
    
    .contact-item {
        font-size: 0.75rem;
        padding: 4px 8px;
        border-radius: 12px;
    }
    
    .no-data {
        padding: 50px 15px;
    }
    
    .no-data i {
        font-size: 3rem;
        margin-bottom: 15px;
    }
    
    .no-data h3 {
        font-size: 1.3rem;
    }
    
    .footer {
        padding: 20px 0;
        font-size: 0.9rem;
    }
    
    /* 表单响应式 */
    .form-input {
        padding: 10px 12px;
        font-size: 0.9rem;
    }
    
    .btn {
        padding: 10px 20px;
        font-size: 0.9rem;
    }
    
    /* 主题切换按钮 */
    .theme-toggle {
        width: 35px;
        height: 35px;
        padding: 8px;
    }
}

/* 超小屏幕设备 (320px以下) */
@media (max-width: 320px) {
    .nav-logo h2 {
        font-size: 1rem;
    }
    
    .page-header h1 {
        font-size: 1.5rem;
    }
    
    .platform-card {
        margin: 0;
    }
    
    .card-header {
        padding: 12px;
    }
    
    .platform-logo {
        width: 40px;
        height: 40px;
    }
    
    .platform-info h3 {
        font-size: 1rem;
    }
    
    .card-body {
        padding: 12px;
    }
    
    .card-footer {
        padding: 12px;
    }
    
    .contact-info {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .contact-item {
        width: 100%;
        justify-content: center;
    }
}

/* 横屏模式优化 */
@media (max-height: 500px) and (orientation: landscape) {
    .nav-menu {
        height: calc(100vh - 60px);
        padding: 20px;
    }
    
    .nav-item {
        margin-bottom: 5px;
    }
    
    .nav-link {
        padding: 10px 15px;
    }
}

/* 高分辨率屏幕优化 */
@media (min-width: 1400px) {
    .container {
        max-width: 1400px;
    }
    
    .platforms-grid {
        grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
        gap: 35px;
    }
    
    .page-header h1 {
        font-size: 3rem;
    }
    
    .page-header p {
        font-size: 1.2rem;
    }
}

/* 打印样式 */
@media print {
    .navbar,
    .search-section,
    .footer,
    .theme-toggle,
    .hamburger {
        display: none;
    }
    
    .main-content {
        margin-top: 0;
    }
    
    .platform-card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ccc;
    }
    
    .platforms-grid {
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    }
}

/* 无障碍访问优化 */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* 高对比度模式 */
@media (prefers-contrast: high) {
    :root {
        --border-color: #000000;
        --text-secondary: #000000;
    }
    
    [data-theme="dark"] {
        --border-color: #ffffff;
        --text-secondary: #ffffff;
    }
    
    .platform-card {
        border-width: 2px;
    }
    
    .nav-link:hover,
    .btn:hover {
        outline: 2px solid currentColor;
    }
}

/* 触摸设备优化 */
@media (hover: none) and (pointer: coarse) {
    .nav-link,
    .btn,
    .search-btn,
    .theme-toggle {
        min-height: 44px;
        min-width: 44px;
    }
    
    .contact-item {
        min-height: 32px;
        padding: 6px 12px;
    }
    
    .platform-card:hover {
        transform: none;
    }
    
    .platform-card:active {
        transform: scale(0.98);
    }
}