/* 响应式设计 */

/* 大屏幕 (1200px 及以上) */
@media (min-width: 1200px) {
    .container {
        max-width: 1140px;
    }
    
    .hero-content h1 {
        font-size: 3.5rem;
    }
}

/* 中等屏幕 (992px - 1199px) */
@media (max-width: 1199px) {
    .container {
        max-width: 960px;
    }
    
    .hero-content h1 {
        font-size: 2.8rem;
    }
    
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* 小屏幕 (768px - 991px) */
@media (max-width: 991px) {
    .container {
        max-width: 720px;
        padding: 0 15px;
    }
    
    /* 导航栏 */
    .navbar .container {
        padding: 0.8rem 15px;
    }
    
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: linear-gradient(135deg, rgba(26, 26, 26, 0.98) 0%, rgba(42, 42, 42, 0.95) 100%);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 1.5rem 0;
        box-shadow: 0 10px 30px rgba(0,0,0,0.3);
        border-top: 1px solid rgba(255, 107, 53, 0.15);
        border-bottom: 1px solid rgba(255, 107, 53, 0.15);
        animation: slideDown 0.3s ease;
    }
    
    @keyframes slideDown {
        from {
            opacity: 0;
            transform: translateY(-20px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .nav-menu li {
        margin: 0;
        width: 100%;
    }
    
    .nav-link {
        padding: 1.2rem 2rem;
        display: block;
        border-bottom: 1px solid rgba(255, 107, 53, 0.1);
        color: #e0e0e0;
        font-weight: 500;
        border-radius: 0;
        transition: all 0.3s ease;
    }

    .nav-link:hover {
        background: rgba(255, 107, 53, 0.15);
        color: #ff6b35;
        transform: translateX(10px);
        border-left: 4px solid #ff6b35;
    }
    
    .contact-btn {
        margin: 1rem 2rem;
        text-align: center;
        border-radius: 12px;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        background: rgba(255, 107, 53, 0.08);
        border-radius: 0;
        border-top: 1px solid rgba(255, 107, 53, 0.2);
        border-bottom: 1px solid rgba(255, 107, 53, 0.2);
        min-width: auto;
        padding: 1rem;
        margin: 0;
    }
    
    .dropdown-content {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .dropdown-title {
        font-size: 0.8rem;
        margin-bottom: 0.5rem;
    }
    
    .dropdown-item {
        padding: 0.8rem 1rem;
        margin-left: 1rem;
    }
    
    .dropdown-item:hover {
        transform: translateX(5px);
    }
    
    .item-icon {
        width: 30px;
        height: 30px;
        font-size: 1.2rem;
    }
    
    .item-name {
        font-size: 0.9rem;
    }
    
    .item-desc {
        font-size: 0.75rem;
    }
    
    /* 主横幅 */
    .hero {
        padding: 100px 0 60px;
        text-align: center;
    }
    
    .hero .container {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    /* 服务网格 */
    .services-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .service-card {
        padding: 2rem 1.5rem;
    }
    
    /* 案例和新闻网格 */
    .cases-grid,
    .news-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    /* 页脚 */
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }
    
    /* CTA按钮 */
    .cta-buttons {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }
    
    .btn {
        min-width: 200px;
    }
}

/* 超小屏幕 (576px - 767px) */
@media (max-width: 767px) {
    .container {
        max-width: 540px;
        padding: 0 10px;
    }
    
    /* 导航栏 */
    .brand-text {
        font-size: 1.3rem;
    }
    
    .logo {
        height: 35px;
    }
    
    /* 主横幅 */
    .hero {
        padding: 90px 0 50px;
    }
    
    .hero-content h1 {
        font-size: 2.2rem;
        line-height: 1.3;
    }
    
    .hero-content p {
        font-size: 1.1rem;
    }
    
    /* 章节标题 */
    .section-title {
        font-size: 2rem;
        margin-bottom: 2rem;
    }
    
    /* 服务卡片 */
    .service-card {
        padding: 1.5rem 1rem;
    }
    
    .service-icon {
        width: 70px;
        height: 70px;
    }
    
    .service-icon img {
        width: 35px;
        height: 35px;
    }
    
    /* 案例卡片 */
    .case-card img,
    .news-item img {
        height: 180px;
    }
    
    .case-content,
    .news-content {
        padding: 1.2rem;
    }
    
    /* 客户评价 */
    .testimonial-content p {
        font-size: 1.1rem;
    }
    
    /* CTA区域 */
    .cta-content h2 {
        font-size: 2rem;
    }
    
    .cta-content p {
        font-size: 1.1rem;
    }
    
    /* 页脚 */
    .footer {
        padding: 40px 0 15px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .social-links {
        justify-content: center;
    }
    
    /* 按钮 */
    .btn {
        padding: 10px 25px;
        font-size: 0.9rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
}

/* 极小屏幕 (575px 及以下) */
@media (max-width: 575px) {
    .container {
        padding: 0 8px;
    }
    
    /* 导航栏 */
    .navbar .container {
        padding: 0.6rem 8px;
    }
    
    .brand-text {
        font-size: 1.2rem;
    }
    
    .logo {
        height: 30px;
    }
    
    /* 主横幅 */
    .hero {
        padding: 80px 0 40px;
    }
    
    .hero-content h1 {
        font-size: 1.8rem;
    }
    
    .hero-content p {
        font-size: 1rem;
    }
    
    /* 章节 */
    .services,
    .cases-preview,
    .testimonials,
    .news-preview,
    .contact-cta {
        padding: 50px 0;
    }
    
    .section-title {
        font-size: 1.8rem;
        margin-bottom: 1.5rem;
    }
    
    /* 服务卡片 */
    .service-card {
        padding: 1.2rem 0.8rem;
    }
    
    .service-card h3 {
        font-size: 1.2rem;
    }
    
    /* 案例和新闻 */
    .case-content h3,
    .news-content h3 {
        font-size: 1.1rem;
    }
    
    .case-content,
    .news-content {
        padding: 1rem;
    }
    
    /* 客户评价 */
    .testimonial-item {
        padding: 1.5rem 1rem;
    }
    
    .testimonial-content p {
        font-size: 1rem;
    }
    
    /* CTA */
    .cta-content h2 {
        font-size: 1.8rem;
    }
    
    .cta-content p {
        font-size: 1rem;
    }
    
    /* 页脚 */
    .footer {
        padding: 30px 0 10px;
    }
    
    .footer-section h3,
    .footer-section h4 {
        font-size: 1.1rem;
    }
    
    .contact-info p {
        font-size: 0.85rem;
    }
    
    /* 按钮 */
    .btn {
        padding: 8px 20px;
        font-size: 0.85rem;
        min-width: 150px;
    }
}

/* 横屏手机优化 */
@media (max-height: 500px) and (orientation: landscape) {
    .hero {
        padding: 60px 0 30px;
        min-height: auto;
    }
    
    .hero-content h1 {
        font-size: 2rem;
        margin-bottom: 1rem;
    }
    
    .hero-content p {
        margin-bottom: 1.5rem;
    }
    
    .navbar .container {
        padding: 0.5rem 15px;
    }
}