/* ============================================
   响应式设计 - 移动端适配
   ============================================ */

/* 平板尺寸 */
@media (max-width: 1024px) {
    .container {
        max-width: 960px;
    }

    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .business-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .footer-content {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .contact-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
}

/* 手机尺寸 */
@media (max-width: 768px) {
    /* 顶部信息条 */
    .top-bar {
        display: none;
    }

    /* 导航 */
    .main-header .container {
        padding: 10px 15px;
    }

    .logo h1 {
        font-size: 1.2rem;
    }

    .logo .logo-en {
        font-size: 0.6rem;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .main-nav {
        position: fixed;
        top: 65px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 65px);
        background: #fff;
        transition: left 0.3s ease;
        overflow-y: auto;
        box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    }

    .main-nav.open {
        left: 0;
    }

    .main-nav ul {
        flex-direction: column;
        padding: 20px;
        gap: 5px;
    }

    .main-nav li a {
        padding: 15px 20px;
        font-size: 1.05rem;
        border-bottom: 1px solid #f0f0f0;
    }

    /* Banner */
    .banner-section {
        height: 400px;
    }

    .banner-content h2 {
        font-size: 1.8rem;
    }

    .banner-content p {
        font-size: 1rem;
    }

    /* 公司概况 */
    .about-section {
        padding: 50px 0;
    }

    .about-stats {
        grid-template-columns: repeat(3, 1fr);
        gap: 10px;
    }

    .stat-number {
        font-size: 1.5rem;
    }

    .stat-label {
        font-size: 0.75rem;
    }

    /* 新闻 */
    .news-section {
        padding: 50px 0;
    }

    .news-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .news-list-item {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .news-list-image {
        width: 100%;
        height: 200px;
    }

    /* 业务领域 */
    .business-section {
        padding: 50px 0;
    }

    .business-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }

    .business-card {
        padding: 25px 15px;
    }

    .business-icon {
        width: 55px;
        height: 55px;
        font-size: 1.4rem;
    }

    /* 页脚 */
    .main-footer {
        padding: 40px 0 0;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .footer-col {
        text-align: center;
    }

    .footer-col h3::after {
        left: 50%;
        transform: translateX(-50%);
    }

    /* 联系我们 */
    .contact-info-box,
    .contact-form-box {
        padding: 30px 20px;
    }

    .contact-grid {
        gap: 20px;
    }

    /* 新闻详情 */
    .news-detail-header h1 {
        font-size: 1.4rem;
    }

    .news-detail-meta {
        flex-wrap: wrap;
        gap: 10px;
    }

    /* Section标题 */
    .section-title h2 {
        font-size: 1.5rem;
    }

    /* 按钮 */
    .btn {
        padding: 10px 20px;
        font-size: 0.9rem;
    }
}

/* 小屏手机 */
@media (max-width: 480px) {
    .container {
        padding: 0 10px;
    }

    .banner-section {
        height: 350px;
    }

    .banner-content h2 {
        font-size: 1.4rem;
    }

    .banner-content p {
        font-size: 0.9rem;
    }

    .about-stats {
        grid-template-columns: 1fr;
    }

    .business-grid {
        grid-template-columns: 1fr;
    }

    .news-card-body {
        padding: 20px;
    }

    .pagination a, .pagination span {
        padding: 6px 12px;
        font-size: 0.85rem;
    }
}