/**
 * 码上出海网站响应式样式文件
 * 包含移动端、平板和不同屏幕尺寸的适配
 */

/* 大屏幕设备 (1200px 及以上) */
@media (min-width: 1200px) {
    .container {
        max-width: 1400px;
    }
    
    .hero-section h1 {
        font-size: 48px;
    }
    
    .hero-section p {
        font-size: 22px;
    }
    
    .content-block h2 {
        font-size: 36px;
    }
    
    .advantages-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* 中等屏幕设备 (992px - 1199px) */
@media (max-width: 1199px) {
    .container {
        max-width: 960px;
    }
    
    .main-content {
        gap: 30px;
    }
    
    .content-right {
        width: 350px;
    }
    
    .hero-section h1 {
        font-size: 38px;
    }
    
    .hero-section p {
        font-size: 18px;
    }
    
    .advantages-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* 平板设备 */
@media (max-width: 1024px) {
    .container {
        padding: 0 15px;
    }
    
    .nav-menu {
        gap: 20px;
    }
    
    .nav-menu a {
        font-size: 15px;
    }
    
    .main-content {
        gap: 30px;
    }
    
    .content-right {
        width: 350px;
    }
    
    .hero-section {
        padding: 50px 30px;
        margin-bottom: 50px;
    }
    
    .hero-section h1 {
        font-size: 36px;
    }
    
    .hero-section p {
        font-size: 18px;
    }
    
    .content-block {
        margin-bottom: 50px;
    }
    
    .content-block h2 {
        font-size: 28px;
        margin-bottom: 30px;
    }
    
    .content-block h3 {
        font-size: 22px;
        margin-bottom: 20px;
        margin-top: 30px;
    }
    
    .content-block p {
        font-size: 16px;
        margin-bottom: 15px;
    }
    
    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 25px;
        margin-top: 35px;
    }
    
    .advantage-item {
        padding: 30px 25px;
    }
    
    .advantage-item h4 {
        font-size: 20px;
        margin-bottom: 15px;
    }
    
    .advantage-item p {
        font-size: 15px;
        margin-bottom: 15px;
    }
    
    .lead-form-container {
        padding: 30px 25px;
        margin-bottom: 25px;
    }
    
    .lead-form-container h3 {
        font-size: 22px;
        margin-bottom: 20px;
    }
    
    .lead-form-container p {
        font-size: 15px;
        margin-bottom: 25px;
    }
    
    .form-group {
        margin-bottom: 20px;
    }
    
    .form-group label {
        font-size: 15px;
        margin-bottom: 8px;
    }
    
    .form-group input,
    .form-group textarea,
    .form-group select {
        padding: 12px 15px;
        font-size: 15px;
    }
    
    .submit-btn {
        padding: 12px 30px;
        font-size: 16px;
    }
}

/* 移动设备 */
@media (max-width: 767px) {
    .container {
        padding: 0 10px;
    }
    
    .header {
        padding: 10px 0;
    }
    
    .nav {
        padding: 10px 0;
    }
    
    .nav-menu {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .language-switcher {
        display: none;
    }
    
    .main-content {
        margin-top: 70px;
        gap: 30px;
        flex-direction: column;
    }
    
    .content-right {
        width: 100%;
        position: static;
        order: -1;
    }
    
    .hero-section {
        padding: 40px 20px;
        margin-bottom: 40px;
        border-radius: 12px;
    }
    
    .hero-section h1 {
        font-size: 28px;
        margin-bottom: 15px;
    }
    
    .hero-section p {
        font-size: 16px;
        margin-bottom: 25px;
    }
    
    .cta-button {
        padding: 12px 30px;
        font-size: 16px;
    }
    
    .content-block {
        margin-bottom: 40px;
    }
    
    .content-block h2 {
        font-size: 24px;
        margin-bottom: 25px;
    }
    
    .content-block h3 {
        font-size: 20px;
        margin-bottom: 15px;
        margin-top: 25px;
    }
    
    .content-block p {
        font-size: 15px;
        margin-bottom: 12px;
    }
    
    .advantages-grid {
        grid-template-columns: 1fr;
        gap: 20px;
        margin-top: 30px;
    }
    
    .advantage-item {
        padding: 25px 20px;
    }
    
    .advantage-item h4 {
        font-size: 18px;
        margin-bottom: 12px;
    }
    
    .lead-form-container {
        padding: 25px 20px;
        margin-bottom: 20px;
    }
    
    .lead-form-container h3 {
        font-size: 20px;
        margin-bottom: 15px;
    }
    
    .lead-form-container p {
        font-size: 14px;
        margin-bottom: 20px;
    }
    
    .form-group {
        margin-bottom: 15px;
    }
    
    .form-group label {
        font-size: 14px;
        margin-bottom: 6px;
    }
    
    .form-group input,
    .form-group select,
    .form-group textarea {
        padding: 10px 12px;
        font-size: 14px;
    }
    
    .submit-btn {
        padding: 12px;
        font-size: 15px;
    }
    
    .contact-info {
        padding: 25px 20px;
    }
    
    .contact-info h4 {
        font-size: 18px;
        margin-bottom: 15px;
    }
    
    .contact-item {
        padding: 8px;
        margin-bottom: 12px;
    }
    
    .contact-item img {
        width: 18px;
        height: 18px;
        margin-right: 8px;
    }
    
    .footer {
        padding: 40px 0 20px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
        margin-bottom: 30px;
    }
    
    .footer-section h4 {
        font-size: 16px;
        margin-bottom: 15px;
    }
    
    .footer-bottom-content {
        flex-direction: column;
        text-align: center;
        gap: 15px;
    }
    
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
    }
    
    .modal-content {
        max-width: 90%;
        margin: 20px;
    }
    
    .modal-header {
        padding: 15px 20px;
    }
    
    .modal-body {
        padding: 20px;
    }
    
    .wechat-info {
        text-align: center;
    }
    
    .qr-code img {
        max-width: 150px;
    }
}

/* 小屏移动设备 (575px 及以下) */
@media (max-width: 575px) {
    .container {
        padding: 0 10px;
    }
    
    .hero-section {
        padding: 30px 15px;
        margin-bottom: 30px;
    }
    
    .hero-section h1 {
        font-size: 24px;
    }
    
    .hero-section p {
        font-size: 14px;
    }
    
    .cta-button {
        padding: 10px 25px;
        font-size: 14px;
    }
    
    .content-block h2 {
        font-size: 22px;
    }
    
    .content-block h3 {
        font-size: 18px;
    }
    
    .content-block p {
        font-size: 14px;
    }
    
    .advantage-item {
        padding: 20px 15px;
    }
    
    .advantage-item h4 {
        font-size: 16px;
    }
    
    .lead-form-container {
        padding: 20px 15px;
    }
    
    .lead-form-container h3 {
        font-size: 18px;
    }
    
    .form-group input,
    .form-group select,
    .form-group textarea {
        padding: 8px 10px;
        font-size: 13px;
    }
    
    .contact-info {
        padding: 20px 15px;
    }
    
    .footer {
        padding: 30px 0 15px;
    }
    
    .footer-content {
        gap: 25px;
        margin-bottom: 25px;
    }
    
    .back-to-top {
        bottom: 15px;
        right: 15px;
        width: 40px;
        height: 40px;
    }
}

/* 超小屏设备 (480px 及以下) */
@media (max-width: 480px) {
    .hero-section h1 {
        font-size: 22px;
    }
    
    .hero-section p {
        font-size: 13px;
    }
    
    .cta-button {
        padding: 8px 20px;
        font-size: 13px;
    }
    
    .content-block h2 {
        font-size: 20px;
    }
    
    .content-block h3 {
        font-size: 16px;
    }
    
    .content-block p {
        font-size: 13px;
    }
    
    .advantage-item {
        padding: 15px 10px;
    }
    
    .advantage-item h4 {
        font-size: 15px;
    }
    
    .lead-form-container {
        padding: 15px 10px;
    }
    
    .lead-form-container h3 {
        font-size: 16px;
    }
    
    .form-group label {
        font-size: 13px;
    }
    
    .form-group input,
    .form-group select,
    .form-group textarea {
        padding: 6px 8px;
        font-size: 12px;
    }
    
    .submit-btn {
        padding: 10px;
        font-size: 14px;
    }
    
    .contact-info {
        padding: 15px 10px;
    }
    
    .contact-info h4 {
        font-size: 16px;
    }
    
    .contact-item {
        padding: 6px;
        margin-bottom: 10px;
    }
    
    .contact-item img {
        width: 16px;
        height: 16px;
        margin-right: 6px;
    }
}

/* 横屏模式 (高度小于宽度) */
@media (orientation: landscape) and (max-height: 600px) {
    .hero-section {
        padding: 30px 0;
        margin-bottom: 30px;
    }
    
    .hero-section h1 {
        font-size: 28px;
        margin-bottom: 15px;
    }
    
    .hero-section p {
        font-size: 16px;
        margin-bottom: 20px;
    }
    
    .content-block {
        margin-bottom: 30px;
    }
    
    .content-block h2 {
        font-size: 24px;
        margin-bottom: 20px;
    }
    
    .advantages-grid {
        gap: 20px;
        margin-top: 25px;
    }
    
    .advantage-item {
        padding: 20px;
    }
}

/* 高分辨率屏幕 (2x 及以上) */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .hero-section::before {
        background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 200 200"><defs><pattern id="grain-hd" width="200" height="200" patternUnits="userSpaceOnUse"><circle cx="100" cy="100" r="1" fill="rgba(255,255,255,0.1)"/></pattern></defs><rect width="200" height="200" fill="url(%23grain-hd)"/></svg>');
    }
}

/* 触摸设备优化 */
@media (hover: none) and (pointer: coarse) {
    .nav-menu a:hover::after {
        width: 0;
    }
    
    .advantage-item:hover {
        transform: none;
    }
    
    .submit-btn:hover {
        transform: none;
    }
    
    .back-to-top:hover {
        transform: none;
    }
    
    .social-link:hover {
        transform: none;
    }
    
    /* 增加触摸目标大小 */
    .nav-menu a {
        padding: 10px 5px;
    }
    
    .cta-button {
        padding: 15px 40px;
        min-height: 44px;
    }
    
    .submit-btn {
        min-height: 44px;
    }
    
    .back-to-top {
        min-width: 44px;
        min-height: 44px;
    }
}

/* 减少动画 (用户偏好) */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .hero-section::before {
        animation: none;
    }
    
    .advantage-item::before {
        animation: none;
    }
    
    .submit-btn::before {
        animation: none;
    }
}

/* 高对比度模式 */
@media (prefers-contrast: high) {
    :root {
        --primary-color: #000080;
        --secondary-color: #ff6600;
        --text-color: #000000;
        --bg-color: #ffffff;
        --border-color: #000000;
    }
    
    .hero-section {
        background: var(--primary-color);
    }
    
    .advantage-item {
        border: 2px solid var(--border-color);
    }
    
    .form-group input,
    .form-group select,
    .form-group textarea {
        border: 2px solid var(--border-color);
    }
}

/* 深色模式支持 */
@media (prefers-color-scheme: dark) {
    :root {
        --text-color: #e5e7eb;
        --text-light: #d1d5db;
        --text-lighter: #9ca3af;
        --bg-color: #111827;
        --bg-light: #1f2937;
        --border-color: #374151;
    }
    
    .header {
        background: var(--bg-color);
        border-bottom: 1px solid var(--border-color);
    }
    
    .advantage-item {
        background: var(--bg-light);
        border-color: var(--border-color);
    }
    
    .contact-info {
        background: var(--bg-light);
        border-color: var(--border-color);
    }
    
    .contact-item {
        background: var(--bg-color);
    }
}