/* 响应式设计 - 移动端优先 */

/* 大屏幕设备 (1200px 及以上) */
@media (min-width: 1200px) {
    .container {
        max-width: 1400px;
    }
    
    .hero-title {
        font-size: 4rem;
    }
    
    .services-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .portfolio-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .advantages-grid,
    .why-choose-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* 中等屏幕设备 (768px - 1199px) */
@media (min-width: 768px) and (max-width: 1199px) {
    .hero-container {
        gap: 3rem;
    }
    
    .hero-title {
        font-size: 3rem;
    }
    
    .services-grid,
    .portfolio-grid,
    .advantages-grid,
    .why-choose-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .about-content {
        gap: 2.5rem;
    }
    
    .about-intro {
        padding: 2.5rem;
    }
    
    .about-intro h3 {
        font-size: 1.75rem;
    }
    
    .about-mission-vision {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .about-card {
        padding: 2rem;
    }
    
    .about-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .values-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 1.25rem;
    }
    
    .value-item {
        padding: 1.5rem;
    }
}

/* 平板设备 (481px - 767px) */
@media (min-width: 481px) and (max-width: 767px) {
    .nav-container {
        padding: 0 15px;
    }
    
    .hero-container {
        padding: 0 15px;
        gap: 2rem;
    }
    
    .hero-title {
        font-size: 2.3rem;
        line-height: 1.25;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .services-grid,
    .portfolio-grid,
    .advantages-grid,
    .why-choose-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .portfolio-grid {
        grid-template-columns: 1fr;
    }
    
    .service-card,
    .portfolio-item,
    .advantage-item,
    .why-item {
        padding: 2rem;
    }
    
    .about-content {
        gap: 2rem;
    }
    
    .about-intro {
        padding: 2rem;
    }
    
    .about-intro h3 {
        font-size: 1.5rem;
    }
    
    .about-intro p {
        font-size: 1rem;
    }
    
    .about-mission-vision {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .about-card {
        padding: 1.5rem;
    }
    
    .about-card-icon {
        width: 60px;
        height: 60px;
        font-size: 2.5rem;
    }
    
    .about-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stat-item {
        padding: 2rem 1.5rem;
    }
    
    .values-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.25rem;
    }
    
    .value-item {
        padding: 1.25rem;
    }
    
    .about-values {
        padding: 2rem;
    }
    
    .values-header h3 {
        font-size: 1.5rem;
    }
    
    .contact-content {
        gap: 2rem;
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* 手机设备 (320px - 480px) */
@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .nav-container {
        padding: 0 15px;
    }
    
    .hero {
        padding-top: 70px;
        min-height: 90vh;
    }
    
    .hero-container {
        padding: 0 15px;
        gap: 1.5rem;
    }
    
    .hero-title {
        font-size: 1.9rem;
        margin-bottom: 1rem;
        line-height: 1.3;
    }
    
    .hero-subtitle {
        font-size: 0.95rem;
        margin-bottom: 1.5rem;
        line-height: 1.7;
    }
    
    .hero-buttons {
        flex-direction: column;
        gap: 0.75rem;
    }
    
    .btn {
        padding: 12px 20px;
        font-size: 0.9rem;
        text-align: center;
    }
    
    .hero-features {
        flex-direction: column;
        gap: 0.75rem;
        align-items: center;
    }
    
    .feature-item {
        white-space: normal;
        text-align: center;
        justify-content: center;
        font-size: 0.8rem;
        padding: 0.6rem 1rem;
    }
    
    .hero-graphic {
        height: 250px;
    }
    
    .floating-element {
        width: 60px;
        height: 60px;
    }
    
    .floating-element:nth-child(2) {
        width: 50px;
        height: 50px;
    }
    
    .floating-element:nth-child(3) {
        width: 70px;
        height: 70px;
    }
    
    section {
        padding: 60px 0;
    }
    
    .section-header {
        margin-bottom: 3rem;
    }
    
    .section-header h2 {
        font-size: 1.7rem;
        margin-bottom: 0.75rem;
        line-height: 1.3;
    }
    
    .section-header p {
        font-size: 1rem;
    }
    
    .services-grid,
    .portfolio-grid,
    .advantages-grid,
    .why-choose-grid {
        gap: 1rem;
    }
    
    .service-card,
    .portfolio-item,
    .advantage-item,
    .why-item {
        padding: 1.5rem;
    }
    
    .service-icon,
    .advantage-icon,
    .why-icon {
        font-size: 2.5rem;
        margin-bottom: 1rem;
    }
    
    .service-card h3 {
        font-size: 1.1rem;
    }
    
    .about-content {
        gap: 2rem;
    }
    
    .about-intro {
        padding: 1.5rem;
    }
    
    .intro-icon {
        font-size: 3rem;
    }
    
    .about-intro h3 {
        font-size: 1.5rem;
        margin-bottom: 1rem;
    }
    
    .about-intro p {
        font-size: 0.95rem;
    }
    
    .about-mission-vision {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .about-card {
        padding: 1.5rem;
        gap: 1rem;
    }
    
    .about-card-icon {
        width: 60px;
        height: 60px;
        font-size: 2.5rem;
    }
    
    .about-card-content h3 {
        font-size: 1.25rem;
    }
    
    .about-card-content p {
        font-size: 0.9rem;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .stat-item {
        padding: 1.5rem;
    }
    
    .stat-icon {
        font-size: 1.5rem;
    }
    
    .stat-number {
        font-size: 2.5rem;
    }
    
    .about-values {
        padding: 1.5rem;
    }
    
    .values-header .about-card-icon {
        font-size: 2.5rem;
        margin-bottom: 0.75rem;
    }
    
    .values-header h3 {
        font-size: 1.5rem;
        margin-bottom: 0.5rem;
    }
    
    .values-header p {
        font-size: 0.9rem;
    }
    
    .values-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .value-item {
        padding: 1.25rem;
        min-height: auto;
    }
    
    .value-icon {
        width: 50px;
        height: 50px;
        font-size: 2rem;
        margin: 0;
    }
    
    .value-content h4 {
        font-size: 1rem;
    }
    
    .value-content p {
        font-size: 0.9rem;
    }
    
    .about-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }
    
    .stat-item {
        padding: 1.5rem;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .contact-content {
        gap: 1.5rem;
    }
    
    .contact-form {
        padding: 1.5rem;
    }
    
    .form-group input,
    .form-group textarea {
        padding: 10px 12px;
        font-size: 0.9rem;
    }
    
    .footer {
        padding: 2rem 0 1rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .footer-section {
        text-align: center;
    }
    
    .social-links {
        justify-content: center;
    }
}

/* 超小屏幕设备 (320px 以下) */
@media (max-width: 320px) {
    .hero-title {
        font-size: 1.75rem;
    }
    
    .hero-subtitle {
        font-size: 0.9rem;
    }
    
    .section-header h2 {
        font-size: 1.5rem;
    }
    
    .service-card,
    .portfolio-item {
        padding: 1rem;
    }
    
    .btn {
        padding: 10px 16px;
        font-size: 0.85rem;
    }
}

/* 横屏模式优化 */
@media (orientation: landscape) and (max-height: 500px) {
    .hero {
        min-height: 100vh;
        padding-top: 60px;
    }
    
    .hero-container {
        grid-template-columns: 1fr 1fr;
        gap: 2rem;
    }
    
    .hero-title {
        font-size: 2rem;
        margin-bottom: 0.75rem;
    }
    
    .hero-subtitle {
        font-size: 0.9rem;
        margin-bottom: 1rem;
    }
    
    .hero-buttons {
        flex-direction: row;
        gap: 0.5rem;
    }
    
    .btn {
        padding: 8px 16px;
        font-size: 0.8rem;
    }
}

/* 高分辨率屏幕优化 */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .hero-graphic {
        transform: scale(1.1);
    }
    
    .floating-element {
        border: 1px solid rgba(255, 255, 255, 0.2);
    }
}

/* 打印样式 */
@media print {
    .navbar,
    .hero-buttons,
    .contact-form,
    .footer {
        display: none;
    }
    
    .hero {
        background: white !important;
        color: black !important;
        min-height: auto;
        padding: 2rem 0;
    }
    
    .hero-title {
        color: black !important;
    }
    
    .hero-subtitle {
        color: #666 !important;
    }
    
    section {
        padding: 2rem 0;
        page-break-inside: avoid;
    }
    
    .service-card,
    .portfolio-item {
        box-shadow: none;
        border: 1px solid #ddd;
    }
}

/* 减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .floating-element {
        animation: none;
    }
}

/* 高对比度模式 */
@media (prefers-contrast: high) {
    .btn-primary {
        background: #000;
        color: #fff;
        border: 2px solid #000;
    }
    
    .btn-secondary {
        background: #fff;
        color: #000;
        border: 2px solid #000;
    }
    
    .service-card,
    .portfolio-item {
        border: 2px solid #000;
    }
    
    .form-group input,
    .form-group textarea {
        border: 2px solid #000;
    }
}

/* 深色模式支持 */
@media (prefers-color-scheme: dark) {
    body {
        background: #1a1a1a;
        color: #e5e5e5;
    }
    
    .navbar {
        background: rgba(26, 26, 26, 0.95);
    }
    
    .nav-link {
        color: #e5e5e5;
    }
    
    .nav-link:hover {
        color: #60a5fa;
    }
    
    .about {
        background: #262626;
    }
    
    .service-card,
    .portfolio-item {
        background: #262626;
        border-color: #404040;
        color: #e5e5e5;
    }
    
    .service-card h3,
    .portfolio-content h3 {
        color: #e5e5e5;
    }
    
    .service-card p,
    .portfolio-content p {
        color: #a3a3a3;
    }
    
    .portfolio {
        background: #262626;
    }
    
    .contact-form {
        background: #262626;
    }
    
    .form-group input,
    .form-group textarea {
        background: #404040;
        border-color: #525252;
        color: #e5e5e5;
    }
    
    .form-group input:focus,
    .form-group textarea:focus {
        border-color: #60a5fa;
    }
    
    .section-header h2 {
        color: #e5e5e5;
    }
    
    .section-header p {
        color: #a3a3a3;
    }
}