/* 响应式设计 */

/* 平板设备 */
@media (max-width: 992px) {
    .header-container {
        padding: 10px 15px;
    }
    
    .logo h1 {
        font-size: 1.5rem;
    }
    
    .main-nav ul {
        gap: 10px;
    }
    
    .main-nav a {
        padding: 8px 10px;
        font-size: 0.9rem;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .prediction-content {
        grid-template-columns: 1fr;
    }
    
    .stats-bar {
        flex-direction: column;
        gap: 15px;
    }
}

/* 手机设备 */
@media (max-width: 768px) {
    .main-nav {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        background-color: var(--dark-bg);
        border-bottom: 2px solid var(--primary-color);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
        z-index: 999;
    }
    
    .main-nav.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .main-nav ul {
        flex-direction: column;
        gap: 0;
    }
    
    .main-nav a {
        padding: 15px 20px;
        border-bottom: 1px solid var(--border-color);
        justify-content: center;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .section-header h2 {
        font-size: 1.5rem;
    }
    
    .refresh-btn {
        position: relative;
        margin-top: 15px;
        width: 100%;
        justify-content: center;
    }
    
    .data-table {
        display: block;
        overflow-x: auto;
    }
    
    .footer-links {
        flex-direction: column;
        align-items: center;
        gap: 30px;
    }
    
    .link-group {
        align-items: center;
    }
    
    .popup-content {
        width: 95%;
        margin: 10px;
    }
}

/* 小屏手机 */
@media (max-width: 480px) {
    .container {
        padding: 15px;
    }
    
    .logo h1 {
        font-size: 1.3rem;
    }
    
    .feature-card, .prediction-card {
        padding: 20px;
    }
    
    .section-header h2 {
        font-size: 1.3rem;
    }
    
    .data-table th,
    .data-table td {
        padding: 10px 8px;
        font-size: 0.9rem;
    }
    
    .btn-confirm, .btn-cancel, .btn-more {
        padding: 10px 20px;
        font-size: 0.9rem;
    }
    
    .popup-body {
        padding: 20px;
    }
    
    .popup-footer {
        flex-direction: column;
    }
}