/* 响应式设计 */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 28px;
    }
    
    .hero p {
        font-size: 16px;
    }
    
    .search-area {
        padding: 20px;
    }
    
    .search-footer {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .search-tips {
        width: 100%;
        margin-bottom: 15px;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }
    
    .features {
        grid-template-columns: 1fr;
    }
    
    .result-content {
        padding: 25px;
    }
    
    .action-bar {
        flex-direction: column;
    }
    
    .action-bar .btn {
        width: 100%;
        text-align: center;
    }
    
    .chat-popup {
        width: calc(100% - 40px);
        right: 20px;
        bottom: 90px;
    }
    
    .result-title {
        font-size: 24px;
    }
    
    /* 横向加载页面的响应式 */
    .loading-steps {
        flex-direction: column;
        gap: 10px;
    }
    
    .loading-steps::before {
        display: none;
    }
    
    .progress-info {
        flex-direction: column;
        gap: 5px;
    }
    
    .loading-step.active {
        transform: translateX(5px);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 10px 15px;
    }
    
    .logo {
        font-size: 24px;
    }
    
    .hero {
        padding: 20px 0 30px;
    }
    
    .hero h1 {
        font-size: 24px;
    }
    
    .search-form textarea {
        height: 120px;
        padding: 15px;
    }
    
    .feature-card {
        padding: 20px;
    }
    
    .result-header, 
    .result-content {
        padding: 20px;
    }
    
    .paywall-message {
        font-size: 20px;
    }
    
    .progress-percent {
        font-size: 32px;
    }
    
    .loading-container {
        margin-bottom: 20px;
    }
}