/* 响应式设计 - 移动端和pad端适配 */

/* 大屏幕 (1920px+) */
@media (min-width: 1920px) {
    .container {
        max-width: 1600px;
        padding: 0 20px;
    }

    .nav-logo {
        width: 80px;
        height: 68px;
        /* background-image: url("../images/logo.svg");
    background-size: cover; */
    }

    .container_flex {
        display: flex;
        gap: 30px;
    }

    /* 新闻中心 */
    .news-center.xwzx {

        max-width: none;
    }

    .news-content {
        display: flex;
    }

    .featured-news {
        width: 45%;
    }

    .news-list {
        flex: 1;
        margin-left: 20px;
    }

    /* 关于我们页面字体自适应 - 大屏幕 */
    .about-text h2 {
        font-size: clamp(3.5rem, 2vw, 4.5rem);
        line-height: 1.1;
        margin-bottom: 30px;
    }

    .partners {
        margin-top: 40px;
    }

    /*   .jzx {
        margin-left: 0 !important;
    } */

    .transportation-map {
        margin-top: 40px;
    }

    .about-culture-list {
        display: flex;
        justify-content: space-between;
        margin-bottom: 40px;
    }

    .about-text p {
        font-size: clamp(1.2rem, 1vw, 1.4rem);
        line-height: 1.4;
        margin-bottom: 30px;
    }

    .about-title {
        font-size: clamp(2.2rem, 1.5vw, 2.5rem);
        margin-bottom: 60px;

    }

    .intro-content-text p {
        font-size: clamp(1.1rem, 0.8vw, 1.2rem);
        line-height: 1.5;
    }

    .about-culture-item {

        display: flex;
        flex-direction: column;

    }

    .about-culture-item>.about-culture-item-icon {
        margin: 10px auto;
    }

}



/* 中等屏幕 (1200px - 1919px) */
@media (min-width: 1200px) and (max-width: 1919px) {
    .container {
        max-width: 83%;
        padding: 0 20px;
    }

    .container_flex {
        display: flex;
        gap: 30px;
    }

    /* 关于我们页面字体自适应 - 中等屏幕 */
    .about-text h2 {
        font-size: clamp(3rem, 2.5vw, 4rem);
        line-height: 1.1;
        margin-bottom: 25px;
    }

    .about-text p {
        font-size: clamp(1.1rem, 1.2vw, 1.25rem);
        line-height: 1.5;
        margin-bottom: 25px;
    }

    .about-title {
        font-size: clamp(2rem, 2vw, 2.25rem);
        margin-bottom: 50px;
    }

    .intro-content-text p {
        font-size: clamp(1rem, 1vw, 1.1rem);
        line-height: 1.6;
    }

    .about-culture-list {
        display: flex;
        justify-content: space-between;

    }

    .about-culture-item>.about-culture-item-icon {

        margin: 10px auto;
    }

    .news-center.xwzx {

        max-width: none;
    }

    .news-content {
        display: flex;
    }

    .featured-news {
        width: 45%;
    }

    .news-list {
        flex: 1;
        margin-left: 20px;
    }
}

/* 平板端 (768px - 1024px) */
@media (min-width: 768px) and (max-width: 1199px) {

    .news-center.xwzx {

        max-width: none;
    }

    .news-content {
        display: flex;
    }

    .featured-news {
        width: 45%;
    }

    .news-list {
        flex: 1;
        margin-left: 20px;
    }

    .about-culture-list {
        display: flex;
        justify-content: space-between;

    }

    .about-culture-item>.about-culture-item-icon {

        margin: 10px auto;
    }

    .container {
        max-width: 90%;
        padding: 0 30px;
    }

    .container_flex {
        display: flex;
        gap: 30px;
    }

    #packaging-items {
        padding: 0;
    }

    .hero-banner {
        aspect-ratio: 1920 / 740;
        /* 保持图片原始比例 */
        min-height: 250px;
        /* 平板端最小高度 */
        max-height: 500px;
        /* 平板端最大高度 */
    }

    .banner-content h1 {
        font-size: 2.5rem;
    }

    .banner-content p {
        font-size: 1.2rem;
    }

    .product-grid {
        gap: 25px;
    }

    .intro-content {
        gap: 40px;
    }

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

    .transport-grid {
        grid-template-columns: 1fr;

    }

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

    .floating-help {
        left: 10px;
        padding: 12px;
        font-size: 14px;
    }

    .floating-sidebar {
        right: 10px;
    }

    .sidebar-btn {
        width: 45px;
        height: 45px;
        font-size: 16px;
    }

    /* 关于我们页面字体自适应 - 平板端 */
    .about-text h2 {
        font-size: clamp(2.2rem, 3.5vw, 3rem);
        line-height: 1.2;
        margin-bottom: 20px;
    }

    .about-text p {
        font-size: clamp(1rem, 2.2vw, 1.2rem);
        line-height: 1.6;
        margin-bottom: 20px;
    }

    .about-title {
        font-size: clamp(1.8rem, 3vw, 2.2rem);
        margin-bottom: 40px;
    }

    .intro-content-text p {
        font-size: clamp(0.9rem, 1.8vw, 1.1rem);
        line-height: 1.7;
    }

    /* 成就展示区域平板端优化 */
    .about-achievement {
        display: none;
    }

    .about-achievement-list {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
    }

    .about-achievement-item {
        padding: 25px 18px;
    }

    .about-achievement-item div:first-child {
        font-size: 2.5rem;
        margin-bottom: 12px;
    }

    .about-achievement-item div:first-child span {
        font-size: 2.8rem;
    }

    .about-achievement-item div:last-child {
        font-size: 1rem;
        line-height: 1.3;
    }

    /* 企业文化区域平板端优化 */
    .about-culture {
        margin-top: 60px;
    }

    .about-culture-list {
        gap: 25px;
    }

    .about-culture-item {
        flex-direction: column;

    }

    .about-culture-item-icon {
        width: 100px;
        height: 100px;
        margin-bottom: 15px;
    }

    .about-culture-images {
        gap: 15px;
    }

    .culture-image-item {
        padding: 25px 15px;
    }

    /* 合作伙伴平板端优化 */
    .partners {
        padding: 70px 0;
    }

    .partners-grid {
        gap: 20px;
        flex-wrap: wrap;
        justify-content: center;
    }

    .partner-logo {
        flex: 0 0 calc(33.333% - 14px);
        max-width: calc(33.333% - 14px);
        min-width: 180px;
        padding: 18px;
    }

    /* 运输版图平板端优化 */
    .transportation-map {
        paddimang: 70px 0;
    }

    .transport-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 25px;
    }

    .transport-item {
        /* height: 300px; */
        margin: 0 auto;
    }

    .transport-content {
        padding: 25px 20px 20px;
    }

    .transport-content h3 {
        font-size: 1.4rem;
        margin-bottom: 10px;
    }

    .transport-content p {
        font-size: 1.1rem;
    }
}

/* 移动端 (最大768px) */
@media (max-width: 768px) {

    .nav-logo {

        width: 65px;
        height: 59px;
        /* background-image: url("../images/logo.svg");
    background-size: cover; */
    }




    .news-content {
        display: flex;
    }

    .featured-news {
        display: none;
    }

    .news-list {
        flex: 1;

    }

    .about-culture-item {
        flex: 1;

        display: flex;
        justify-content: center;
        align-items: center;
        background-color: rgb(243, 242, 242);
        margin: 20px;

        box-sizing: border-box;

    }


    body {
        overflow-x: hidden;
        width: 100%;
    }

    #packaging-items {
        padding: 0;
    }

    /* 首页公司介绍区域移动端优化 */
    .index-company-intro {
        padding: 40px 20px !important;
        background-size: cover;
        /* background: none;
        background-color: #f8f9fa !important; */
    }

    html {
        width: 100%;
        overflow-x: hidden;
    }

    .container {
        max-width: 100%;
        padding: 0 20px;
        width: 100%;
        box-sizing: border-box;
    }


    .about-intro-content {
        display: flex;
        flex-direction: column;
        gap: 30px;
    }

    .company-about .intro-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .company-about {
        height: auto !important;
        min-height: 300px;
        padding: 40px 0 !important;
    }

    .about-company-intro {
        height: auto !important;
        min-height: 400px;
        padding: 40px 0 !important;
    }

    .about-intro-content {
        height: auto !important;
        flex-direction: column;
        gap: 30px;
    }

    .intro-content-image {
        width: 100% !important;
        height: 250px !important;
        aspect-ratio: 637/451;
        order: 1;
        overflow: hidden;
    }

    .intro-content-image img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        object-position: center;
    }

    .intro-content-image-bg {
        height: 100% !important;
        width: 100% !important;
        top: 0 !important;
        left: 0 !important;
    }

    .intro-content-text {
        width: 100% !important;
        height: auto !important;
        order: 2;
        padding: 0;
    }

    .about-text h2 {
        font-size: clamp(1.8rem, 4vw, 2.5rem);
        line-height: 1.3;
        margin-bottom: 15px;
    }

    .about-text p {
        font-size: clamp(0.9rem, 2.5vw, 1.1rem);
        line-height: 1.7;
        margin-bottom: 15px;
    }

    .about-title {
        font-size: clamp(1.5rem, 4vw, 2rem);
        margin-bottom: 30px;
    }

    .intro-content-text p {
        font-size: clamp(0.85rem, 2.2vw, 1rem);
        line-height: 1.8;
    }

    .about-achievement {
        display: none;
    }

    .about-achievement-list {
        grid-template-columns: 1fr !important;
        gap: 20px;
    }

    .about-achievement-item {
        padding: 20px 15px;
    }

    .about-achievement-item div:first-child {
        font-size: 2.2rem;
        margin-bottom: 10px;
    }

    .about-achievement-item div:first-child span {
        font-size: 2.5rem;
    }

    .about-achievement-item div:last-child {
        font-size: 0.95rem;
        line-height: 1.3;
    }

    /* 企业文化区域移动端优化 */
    .about-culture {
        margin-top: 50px;
        /* padding: 0 20px; */
    }

    .about-culture-list {
        grid-template-columns: repeat(2, 1fr) !important;
    }

    .about-culture-item {
        justify-content: center;
        padding: 20px;
        border-radius: 10px;
    }

    .about-culture-item-icon {
        width: 80px;
        height: 80px;
        margin: 0 auto 15px;
    }

    .about-culture-images {
        flex-direction: column;
        width: 100% !important;

        gap: 20px;
    }

    .about-container {
        width: 100% !important;
    }

    .culture-image-item {
        width: 100% !important;
        aspect-ratio: 16/9;
        padding: 20px 15px;
    }



    .timeline {
        display: flex;
        flex-direction: column;
        gap: 20px;
    }

    .timeline-item {
        display: flex;
        flex-direction: column;
        gap: 10px;
        padding: 20px;
        background: #f8f9fa;
        border-radius: 8px;
    }

    .timeline-year {
        font-size: 1.2rem;
        font-weight: bold;
        color: #3F92B7;
    }

    .timeline-content h3 {
        font-size: 1.1rem;
        margin-bottom: 8px;
        color: #2c3e50;
    }

    .timeline-content p {
        font-size: 14px;
        color: #666;
        line-height: 1.6;
    }

    /* 团队介绍移动端优化 */
    .team-section {
        padding: 40px 0;
    }

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

    .team-member {
        text-align: center;
        padding: 20px;
        background: #f8f9fa;
        border-radius: 10px;
    }

    .member-avatar {
        width: 80px;
        height: 80px;
        margin: 0 auto 15px;
        border-radius: 50%;
        background: #3F92B7;
        display: flex;
        align-items: center;
        justify-content: center;
        color: white;
        font-weight: bold;
    }

    .team-member h3 {
        font-size: 1.2rem;
        margin-bottom: 5px;
        color: #2c3e50;
    }

    .team-member p {
        font-size: 14px;
        color: #666;
        margin-bottom: 10px;
    }

    .member-desc {
        font-size: 13px;
        line-height: 1.6;
        color: #888;
    }

    .nav-container {
        padding: 0 20px;
        max-width: 100%;
        width: 100%;
        box-sizing: border-box;
    }

    .top-nav {
        display: none;
    }

    .hero-banner {
        aspect-ratio: 1920 / 740;
        /* 保持图片原始比例 */
        min-height: 200px;
        /* 移动端最小高度 */
        max-height: 400px;
        /* 移动端最大高度 */
    }

    .banner-content h1 {
        font-size: 2rem;
        margin-bottom: 15px;
    }

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

    .banner-controls {
        bottom: 20px;
        left: 20px;
        gap: 15px;
    }

    .banner-dots .dot {
        padding: 6px 10px;
        font-size: 12px;
    }

    .banner-arrows .arrow {
        width: 35px;
        height: 35px;
        font-size: 16px;
    }

    .product-center {
        padding: 40px 0;
        width: 100%;
        overflow-x: hidden;
    }

    .product-center .container {
        width: 100%;
        max-width: 100%;
        padding: 0 20px;
    }

    .product-tabs {
        gap: 20px;
    }

    .tab-btn {
        font-size: 12px;
        white-space: nowrap;
    }

    .product-grid {
        gap: 20px;
    }

    .flask-container {
        height: 100px;
    }

    .flask {
        font-size: 12px;
        padding: 8px 15px;
    }

    .product-card h3 {
        font-size: 1.3rem;
        margin-bottom: 10px;
    }

    .product-card p {
        font-size: 13px;
    }

    .company-intro {
        padding: 60px 0;
    }

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

    .intro-text h2 {
        font-size: 2rem;
        margin-bottom: 15px;
    }

    .intro-text p {
        font-size: 1rem;
        margin-bottom: 15px;
    }

    .intro-bg {
        height: 300px;
    }

    .intro-stats {
        width: 100%;
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
        background: rgba(255, 255, 255, 0.4);
    }

    .stat-box {
        padding: 12px;
    }

    .stat-number {
        font-size: 1.2rem;
    }

    .stat-text {
        font-size: 11px;
    }

    .news-center {
        padding: 10px 0;
    }

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

    .news-info {
        padding: 15px;
    }

    .news-info h3 {
        font-size: 1.1rem;
        margin-bottom: 10px;
    }

    .news-item {
        padding: 15px;
    }

    .news-item h4 {
        font-size: 1rem;
        margin-bottom: 8px;
    }

    .news-item p {
        font-size: 13px;
        margin-bottom: 8px;
    }

    .transportation-map {
        margin: 20px 0;
    }

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

    .transport-item {
        height: auto;

    }

    .transport-content {
        padding: 20px 15px 15px;
    }

    .transport-content h3 {
        font-size: 1.3rem;
        margin-bottom: 8px;
    }

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

    .transport-content {
        padding: 20px 15px 15px;
    }

    .transport-content h3 {
        font-size: 1.3rem;
        margin-bottom: 8px;
    }

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

    .partners {
        padding: 60px 0;
        width: 100%;
        overflow-x: hidden;
    }

    .partners-grid {
        gap: 15px;
        width: 100%;
        max-width: 100%;
        flex-wrap: wrap;
        justify-content: center;
    }

    .partner-logo {
        padding: 15px;
        font-size: 14px;
        flex: 0 0 calc(50% - 7.5px);
        max-width: calc(50% - 7.5px);
        min-width: 150px;
    }

    .footer {
        padding: 30px 0 15px;
    }

    .footer-content {
        display: flex;
        flex-direction: column;
        gap: 25px;
        text-align: left;
        margin-bottom: 25px;
    }

    .footer-section {
        margin-bottom: 15px;
        padding: 0;
        border-left: none;
    }

    .footer-section:first-child {
        padding-left: 0;
    }

    .footer-section h4 {
        font-size: 16px;
        margin-bottom: 15px;
        color: #fff;
    }

    .footer-links {
        display: flex;
        flex-wrap: wrap;
        gap: 15px;
    }

    .footer-links li {
        margin-bottom: 0;
    }

    .footer-links a {
        font-size: 14px;
        padding: 5px 0;
        color: #fff;
    }

    .email-subscription {
        flex-direction: column;
        gap: 10px;
        margin-bottom: 15px;
    }

    .email-input {
        width: 100%;
        padding: 10px 15px !important;
        font-size: 14px;
        border-radius: 8px;
    }

    .footer-btn {
        width: auto;
        font-size: 10px;
        border-radius: 8px;
        line-height: 1;
    }

    .contact-info p {
        font-size: 14px;
        margin-bottom: 8px;
        line-height: 1.5;
    }

    /* 联系页面移动端布局 */
    .contact-page {
        flex-direction: column;
        /* 移动端上下排列 */
        gap: 20px;
        /* 两个部分之间的间距 */
    }

    .contact-sidebar,
    .contact-form-section {
        flex: none;
        /* 取消flex比例，让内容自然撑开 */
        width: 100%;
        /* 确保宽度一致 */
        min-height: auto;
        /* 取消最小高度限制 */
    }

    .contact-sidebar {
        padding: 20px;
    }

    .contact-form-section {
        padding: 20px;
    }

    /* 移动端中文内容优化 */
    .footer-bottom p {
        font-size: 13px;
        line-height: 1.6;
    }

    .footer-bottom p:last-child {
        font-size: 14px;
        margin-top: 8px;
    }

    .footer-section p {
        font-size: 13px;
        line-height: 1.6;
    }

    .email-subscription {
        flex-direction: column;
        gap: 10px;
    }

    .floating-help {
        left: 10px;
        padding: 10px;
        font-size: 12px;
        border-radius: 20px;
    }

    .floating-help span {
        display: none;
    }

    .floating-sidebar {
        right: 10px;
        gap: 8px;
    }

    .sidebar-btn {
        width: 40px;
        height: 40px;
        font-size: 14px;
    }

    .responsibility-section .content-image {
        order: 1;
    }

    .breadcrumb-container {
        padding: 20px !important;
    }

    .detail-container {
        width: 100% !important;
    }

    .product-info-content {
        padding: 0 !important;
        gap: 0 !important;
    }

    .product-details {
        padding: 15px !important;
    }

    .application-fields-section {
        padding: 30px 0 !important;
    }

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

    .safety-item {
        padding: 10px 0 !important;
        background: none !important;
        border: none !important;
    }

    .application-fields-section .detail-container,
    .safety-section .detail-container,
    .packaging-section .detail-container,
    .specifications-section .detail-container {
        padding: 30px 20px !important;
    }

    .section-title {
        font-size: 32px !important;
    }

    .way-content .way-title {
        font-size: 28px !important;
    }

    .way-content .way-desc {
        font-size: 16px !important;
    }

    .flask-title {
        font-size: 16px !important;
    }

    .products-header>h2 {
        font-size: 24px !important;
    }

    .product-list-title h3 {
        font-size: 15px !important;
    }

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

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

    .application-field {
        height: 200px !important;
    }
}

/* 小屏移动端 (最大480px) */
@media (max-width: 480px) {
    #packaging-items {
        padding: 0;
    }

    /* 首页公司介绍区域小屏移动端优化 */
    .index-company-intro {
        padding: 30px 15px !important;
        background-size: cover;
        /* background: none !important;
        background-color: #f8f9fa !important; */
    }

    .banner-content h1 {
        font-size: 1.8rem;
    }

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

    /* 关于我们页面小屏移动端优化 */
    .about-intro-content {
        gap: 25px;
    }

    /* 小屏移动端进一步优化高度 */
    .company-about {
        min-height: 250px;
        padding: 30px 0 !important;
    }

    /* 小屏移动端关于我们页面进一步优化 */
    .about-company-intro {
        min-height: 300px;
        padding: 30px 0 !important;
    }

    .intro-content-image {
        height: 200px !important;
        aspect-ratio: 637/451;
        overflow: hidden;
    }

    .intro-content-image img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        object-position: center;
    }

    .about-text {

        position: absolute;
        top: 100px;
    }

    /* 关于我们页面字体自适应 - 小屏移动端 */
    .about-text h1 {
        font-size: 20px;

        margin-bottom: 5px;


    }

    .about-text p {
        font-size: clamp(0.8rem, 2.2vw, 0.9rem);
        line-height: 1.8;
        margin-bottom: 12px;
    }

    .about-title {
        font-size: clamp(1.3rem, 3.5vw, 1.5rem);
        margin-bottom: 25px;
    }

    .intro-content-text p {
        font-size: clamp(0.75rem, 2vw, 0.85rem);
        line-height: 1.8;
    }

    /* 发展历程小屏优化 */
    .timeline-item {
        padding: 15px;
    }

    .timeline-year {
        font-size: 1.1rem;
    }

    .timeline-content h3 {
        font-size: 1rem;
    }

    .timeline-content p {
        font-size: 13px;
    }

    /* 团队介绍小屏优化 */
    .team-member {
        padding: 15px;
    }

    .member-avatar {
        width: 70px;
        height: 70px;
        font-size: 14px;
    }

    .team-member h3 {
        font-size: 1.1rem;
    }

    .team-member p {
        font-size: 13px;
    }

    .member-desc {
        font-size: 12px;
    }

    .btn {
        width: 180px;
        padding: 10px 25px;
        font-size: 0.9rem;
    }

    .section-title {
        font-size: 32px !important;
    }

    .flask-container {
        height: 80px;
    }

    .flask {
        font-size: 11px;
        padding: 6px 12px;
    }

    .intro-text h2 {
        font-size: 1.8rem;
    }

    .intro-text p {
        font-size: 0.95rem;
    }

    .intro-bg {
        height: 250px;
    }

    .stat-box {
        padding: 10px;
    }

    .stat-number {
        font-size: 1.4rem;
    }

    .stat-text {
        font-size: 10px;
    }

    .news-info h3 {
        font-size: 1rem;
    }

    .news-item h4 {
        font-size: 0.9rem;
    }

    .transport-content h3 {
        font-size: 1.1rem;
    }

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

    .partners-grid {
        gap: 10px;
    }

    .partner-logo {
        padding: 12px;
        font-size: 12px;
    }

    .floating-help {
        left: 5px;
        padding: 8px;
        font-size: 10px;
    }

    .floating-sidebar {
        right: 5px;
        gap: 5px;
    }

    .sidebar-btn {
        width: 35px;
        height: 35px;
        font-size: 12px;
    }

    /* 成就展示区域小屏移动端优化 */
    .about-achievement {
        display: none;
    }

    .about-achievement-list {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .about-achievement-item {
        padding: 18px 12px;
    }

    .about-achievement-item div:first-child {
        font-size: 1.8rem;
        margin-bottom: 8px;
    }

    .about-achievement-item div:first-child span {
        font-size: 2rem;
    }

    .about-achievement-item div:last-child {
        font-size: 0.85rem;
        line-height: 1.4;
    }

    /* 企业文化区域小屏移动端优化 */
    .about-culture {
        margin-top: 40px;
        /* padding: 0 15px; */
    }

    .about-culture-list {
        gap: 20px;
    }



    .about-culture-item-icon {
        width: 60px;
        height: 60px;
        margin: 0 auto 12px;
    }

    .culture-image-item {
        padding: 15px 12px;
    }

    /* 合作伙伴小屏移动端优化 */
    .partners {
        padding: 50px 0;
    }

    .partners-grid {
        gap: 10px;
    }

    .partner-logo {
        flex: 0 0 calc(50% - 5px);
        max-width: calc(50% - 5px);
        min-width: 120px;
        padding: 12px;
        font-size: 12px;
    }

    /* 小屏移动端中文内容优化 */
    .footer {
        padding: 25px 0 10px;
    }

    .footer-content {
        gap: 20px;
        margin-bottom: 20px;
    }

    .footer-section h4 {
        font-size: 15px;
        margin-bottom: 12px;
    }

    .footer-links {
        gap: 12px;
    }

    .footer-links a {
        font-size: 13px;
        color: #fff;
    }

    .email-input {
        padding: 8px 12px !important;
        font-size: 13px;
    }

    .footer-btn {
        padding: 6px 15px;
        font-size: 13px;
    }

    .contact-info p {
        font-size: 13px;
        margin-bottom: 6px;
    }

    .footer-bottom p {
        font-size: 12px;
        line-height: 1.5;
    }

    .footer-bottom p:last-child {
        font-size: 13px;
        margin-top: 6px;
    }

    .footer-section p {
        font-size: 12px;
        line-height: 1.5;
    }
}

/* 横屏移动端 */
@media (max-height: 500px) and (orientation: landscape) {
    .hero {
        min-height: 400px;
        padding: 40px 0;
    }

    .hero-container {
        gap: 20px;
    }

    .hero-title {
        font-size: 1.8rem;
    }

    .hero-subtitle {
        font-size: 0.9rem;
    }

    .hero-placeholder {
        height: 150px;
    }
}

/* 高分辨率屏幕优化 */
@media (-webkit-min-device-pixel-ratio: 2),
(min-resolution: 192dpi) {
    .hero {
        background-image: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    }
}

/* 打印样式 */
@media print {

    .navbar,
    .footer,
    .hero-buttons {
        display: none;
    }

    main {
        margin-top: 0;
    }

    .hero {
        background: none;
        color: #000;
        padding: 20px 0;
    }

    .features,
    .about-preview {
        padding: 20px 0;
    }
}

/* 无障碍访问优化 */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* 深色模式支持 */
@media (prefers-color-scheme: dark) {
    body {
        background-color: #1a1a1a;
        color: #e0e0e0;
    }

    .navbar {
        background-color: #2d2d2d;
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    }

    .nav-link {
        color: #e0e0e0;
    }

    .feature-card {
        background-color: #2d2d2d;
        color: #e0e0e0;
    }

    .about-placeholder {
        background-color: #3d3d3d;
        color: #b0b0b0;
    }
}