* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #1e88e5;
    --secondary-color: #ff6b35;
    --dark-color: #2c3e50;
    --light-color: #ecf0f1;
    --text-color: #333;
    --text-light: #666;
    --white: #ffffff;
    --shadow: 0 2px 10px rgba(0,0,0,0.1);
    --shadow-hover: 0 5px 20px rgba(0,0,0,0.15);
}

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 移动端触摸优化 */
* {
    -webkit-tap-highlight-color: transparent;
}

a, button {
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    user-select: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏 */
.navbar {
    background: var(--white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 1rem 0;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo-img {
    height: 50px;
    width: auto;
    object-fit: contain;
}

.nav-brand h1 {
    color: var(--primary-color);
    font-size: 1.8rem;
    margin-bottom: 0.2rem;
}

.nav-brand .subtitle {
    color: var(--text-light);
    font-size: 0.9rem;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: color 0.3s;
    position: relative;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--primary-color);
}

.nav-menu a.active::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--primary-color);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-color);
    transition: 0.3s;
}

/* 英雄区域 */
.hero {
    position: relative;
    height: 500px;
    background: linear-gradient(135deg, var(--primary-color) 0%, #1565c0 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--white);
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 0;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(30, 136, 229, 0.8) 0%, rgba(21, 101, 192, 0.8) 100%);
    z-index: 1;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 600"><path d="M0,300 Q300,200 600,300 T1200,300 L1200,600 L0,600 Z" fill="rgba(255,255,255,0.1)"/></svg>');
    background-size: cover;
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
}

.hero-content h2 {
    font-size: 3rem;
    margin-bottom: 1rem;
    animation: fadeInUp 1s;
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    animation: fadeInUp 1s 0.2s both;
}

/* 按钮 */
.btn {
    display: inline-block;
    padding: 12px 30px;
    text-decoration: none;
    border-radius: 5px;
    transition: all 0.3s;
    font-weight: 500;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: var(--secondary-color);
    color: var(--white);
    animation: fadeInUp 1s 0.4s both;
}

.btn-primary:hover {
    background: #e55a2b;
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.btn-secondary {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: var(--white);
}

/* 章节标题 */
.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--dark-color);
    position: relative;
    padding-bottom: 1rem;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--primary-color);
    border-radius: 2px;
}

/* 产品分类 */
.categories {
    padding: 80px 0;
    background: var(--light-color);
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.category-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: all 0.3s;
    cursor: pointer;
}

.category-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.category-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.category-card h3 {
    color: var(--dark-color);
    margin-bottom: 0.5rem;
}

.category-card p {
    color: var(--text-light);
    font-size: 0.9rem;
}

/* 特色服务 */
.features {
    padding: 80px 0;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.feature-item {
    text-align: center;
    padding: 2rem;
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: var(--primary-color);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin: 0 auto 1rem;
}

.feature-item h3 {
    color: var(--dark-color);
    margin-bottom: 0.5rem;
}

.feature-item p {
    color: var(--text-light);
}

/* 统计数据 */
.stats {
    padding: 60px 0;
    background: linear-gradient(135deg, var(--primary-color) 0%, #1565c0 100%);
    color: var(--white);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    text-align: center;
}

.stat-item {
    padding: 2rem 1rem;
}

.stat-number {
    font-size: 3rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
    display: inline-block;
}

.stat-label {
    font-size: 2rem;
    font-weight: bold;
    display: inline-block;
    margin-left: 0.25rem;
}

.stat-item p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.1rem;
    margin-top: 0.5rem;
}

/* 热门产品 */
.featured-products {
    padding: 80px 0;
}

.section-subtitle {
    text-align: center;
    color: var(--text-light);
    font-size: 1.1rem;
    margin-bottom: 3rem;
}

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

/* 客户评价 */
.testimonials {
    padding: 80px 0;
    background: var(--light-color);
}

.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.testimonial-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
    transition: all 0.3s;
}

.testimonial-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.testimonial-content {
    margin-bottom: 1.5rem;
}

.testimonial-rating {
    color: #ffc107;
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

.testimonial-content p {
    color: var(--text-color);
    line-height: 1.8;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--light-color);
}

.author-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--primary-color);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    font-weight: bold;
    flex-shrink: 0;
}

.author-info h4 {
    color: var(--dark-color);
    margin-bottom: 0.25rem;
    font-size: 1rem;
}

.author-info span {
    color: var(--text-light);
    font-size: 0.9rem;
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    box-shadow: var(--shadow-hover);
    transition: all 0.3s;
    z-index: 999;
    opacity: 0;
    transform: translateY(20px);
}

.back-to-top.show {
    display: flex;
    opacity: 1;
    transform: translateY(0);
}

.back-to-top:hover {
    background: #1565c0;
    transform: translateY(-3px);
    box-shadow: 0 5px 25px rgba(30, 136, 229, 0.4);
}

.back-to-top span {
    line-height: 1;
}

/* 资讯预览 */
.news-preview {
    padding: 80px 0;
    background: var(--white);
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.news-card {
    background: var(--white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: all 0.3s;
}

.news-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.news-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
}

.news-content {
    padding: 1.5rem;
}

.news-date {
    color: var(--text-light);
    font-size: 0.9rem;
}

.news-content h3 {
    color: var(--dark-color);
    margin: 0.5rem 0;
}

.news-content p {
    color: var(--text-light);
    margin-bottom: 1rem;
    line-height: 1.6;
}

.read-more {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.read-more:hover {
    color: var(--secondary-color);
}

/* 页脚 */
.footer {
    background: var(--dark-color);
    color: var(--white);
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3 {
    margin-bottom: 1rem;
    color: var(--white);
}

.footer-section p {
    color: rgba(255,255,255,0.8);
    line-height: 1.8;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    transition: color 0.3s;
}

.footer-section a:hover {
    color: var(--white);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    color: rgba(255,255,255,0.6);
}

.footer-bottom p {
    margin-bottom: 0.5rem;
}

.footer-bottom p:last-child {
    margin-bottom: 0;
}

.footer-bottom a {
    color: rgba(255,255,255,0.6);
    text-decoration: none;
    transition: color 0.3s;
}

.footer-bottom a:hover {
    color: rgba(255,255,255,0.9);
}

/* 页面内容 */
.page-content {
    padding: 60px 0;
    min-height: 60vh;
}

.page-header {
    text-align: center;
    margin-bottom: 3rem;
}

.page-header h1 {
    font-size: 2.5rem;
    color: var(--dark-color);
    margin-bottom: 1rem;
}

.page-header p {
    color: var(--text-light);
    font-size: 1.1rem;
}

.content-section {
    background: var(--white);
    padding: 3rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
}

.content-section h2 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--light-color);
}

.content-section h3 {
    color: var(--dark-color);
    margin: 1.5rem 0 1rem;
}

.content-section p {
    color: var(--text-color);
    line-height: 1.8;
    margin-bottom: 1rem;
}

.content-section ul {
    margin-left: 2rem;
    margin-bottom: 1rem;
}

.content-section li {
    color: var(--text-color);
    line-height: 1.8;
    margin-bottom: 0.5rem;
}

/* 产品网格 */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.product-card {
    background: var(--white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: all 0.3s;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.product-image {
    width: 100%;
    height: 250px;
    object-fit: cover;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: block;
}

.product-info {
    padding: 1.5rem;
}

.product-info h3 {
    color: var(--dark-color);
    margin-bottom: 0.5rem;
}

.product-price {
    color: var(--secondary-color);
    font-size: 1.3rem;
    font-weight: bold;
    margin: 0.5rem 0;
}

.product-description {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

/* 联系表单 */
.contact-form {
    max-width: 600px;
    margin: 0 auto;
    background: var(--white);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--dark-color);
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* 动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 产品筛选 */
.category-filter {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 2rem;
}

.filter-btn {
    padding: 10px 20px;
    background: var(--white);
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    border-radius: 5px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    transition: all 0.3s;
}

.filter-btn:hover {
    background: var(--primary-color);
    color: var(--white);
}

.filter-btn.active {
    background: var(--primary-color);
    color: var(--white);
}

/* 产品详情模态框 */
.product-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2000;
    animation: fadeIn 0.3s;
}

.product-modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    background: var(--white);
    border-radius: 15px;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    z-index: 2001;
    animation: slideUp 0.3s;
}

.modal-header {
    padding: 1.5rem 2rem;
    border-bottom: 2px solid var(--light-color);
}

.modal-header h2 {
    color: var(--primary-color);
    font-size: 1.5rem;
    margin: 0;
}

.modal-body {
    padding: 2rem;
}

.product-detail-item {
    margin-bottom: 1.5rem;
    display: flex;
    align-items: flex-start;
}

.detail-label {
    font-weight: 600;
    color: var(--dark-color);
    min-width: 100px;
    margin-right: 1rem;
}

.detail-value {
    color: var(--text-color);
    flex: 1;
    line-height: 1.6;
}

.modal-contact-text {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--light-color);
    color: var(--text-light);
    text-align: center;
    font-size: 0.95rem;
}

.modal-footer {
    padding: 1.5rem 2rem;
    border-top: 2px solid var(--light-color);
    text-align: right;
}

.modal-confirm-btn {
    padding: 10px 40px;
    font-size: 1rem;
    border-radius: 25px;
    background: var(--primary-color);
    border: 2px solid var(--primary-color);
    color: var(--white);
    cursor: pointer;
    transition: all 0.3s;
}

.modal-confirm-btn:hover {
    background: #1565c0;
    border-color: #1565c0;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(30, 136, 229, 0.4);
}

.product-card {
    cursor: pointer;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideUp {
    from {
        transform: translateY(50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }

    /* 导航栏移动端优化 */
    .navbar {
        padding: 0.75rem 0;
    }

    .navbar .container {
        padding: 0 15px;
    }

    .nav-brand h1 {
        font-size: 1.4rem;
    }

    .nav-brand .subtitle {
        font-size: 0.8rem;
    }

    .logo-img {
        height: 40px;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 60px;
        flex-direction: column;
        background: var(--white);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow);
        padding: 1.5rem 0;
        gap: 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-menu li {
        width: 100%;
        padding: 0.75rem 0;
        border-bottom: 1px solid var(--light-color);
    }

    .nav-menu li:last-child {
        border-bottom: none;
    }

    .nav-menu a {
        display: block;
        padding: 0.5rem 0;
        font-size: 1rem;
    }

    .nav-toggle {
        display: flex;
    }

    /* 英雄区域移动端优化 */
    .hero {
        height: 400px;
        padding: 0 15px;
    }

    .hero-content h2 {
        font-size: 1.8rem;
        margin-bottom: 0.75rem;
    }

    .hero-content p {
        font-size: 0.95rem;
        margin-bottom: 1.5rem;
        padding: 0 10px;
    }

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

    /* 章节标题移动端优化 */
    .section-title {
        font-size: 1.8rem;
        margin-bottom: 2rem;
        padding-bottom: 0.75rem;
    }

    /* 分类卡片移动端优化 */
    .category-grid,
    .feature-grid,
    .news-grid,
    .product-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .category-card {
        padding: 1.5rem;
    }

    .category-icon {
        font-size: 2.5rem;
    }

    .category-card h3 {
        font-size: 1.1rem;
    }

    .category-card p {
        font-size: 0.85rem;
    }

    /* 特色服务移动端优化 */
    .features {
        padding: 50px 0;
    }

    .feature-item {
        padding: 1.5rem 1rem;
    }

    .feature-icon {
        width: 50px;
        height: 50px;
        font-size: 1.2rem;
    }

    .feature-item h3 {
        font-size: 1.1rem;
    }

    .feature-item p {
        font-size: 0.9rem;
    }

    /* 资讯卡片移动端优化 */
    .news-preview {
        padding: 50px 0;
    }

    .news-image {
        height: 180px;
    }

    .news-content {
        padding: 1.25rem;
    }

    .news-content h3 {
        font-size: 1.1rem;
        margin: 0.5rem 0;
    }

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

    /* 产品卡片移动端优化 */
    .product-image {
        height: 220px;
    }

    .product-info {
        padding: 1.25rem;
    }

    .product-info h3 {
        font-size: 1.1rem;
    }

    .product-price {
        font-size: 1.2rem;
    }

    .product-description {
        font-size: 0.85rem;
    }

    .product-info .btn {
        width: 100%;
        padding: 10px;
        font-size: 0.9rem;
    }

    /* 页面内容移动端优化 */
    .page-content {
        padding: 40px 0;
    }

    .page-header h1 {
        font-size: 1.8rem;
        margin-bottom: 0.75rem;
    }

    .page-header p {
        font-size: 1rem;
    }

    .content-section {
        padding: 1.5rem;
        margin-bottom: 1.5rem;
    }

    .content-section h2 {
        font-size: 1.4rem;
        margin-bottom: 1rem;
    }

    .content-section h3 {
        font-size: 1.2rem;
        margin: 1rem 0 0.75rem;
    }

    .content-section p {
        font-size: 0.95rem;
        line-height: 1.7;
    }

    .content-section ul {
        margin-left: 1.5rem;
    }

    /* 产品筛选按钮移动端优化 */
    .category-filter {
        gap: 0.75rem;
        margin-bottom: 1.5rem;
    }

    .filter-btn {
        padding: 8px 16px;
        font-size: 0.9rem;
        flex: 1;
        min-width: calc(50% - 0.375rem);
    }

    /* 联系表单移动端优化 */
    .contact-form {
        padding: 1.5rem;
    }

    .form-group {
        margin-bottom: 1.25rem;
    }

    .form-group label {
        font-size: 0.95rem;
    }

    .form-group input,
    .form-group textarea {
        padding: 10px;
        font-size: 0.95rem;
    }

    /* 模态框移动端优化 */
    .modal-content {
        width: 95%;
        max-height: 85vh;
        border-radius: 10px;
    }

    .modal-header {
        padding: 1.25rem 1.5rem;
    }

    .modal-header h2 {
        font-size: 1.3rem;
    }

    .modal-body {
        padding: 1.5rem;
    }

    .modal-footer {
        padding: 1.25rem 1.5rem;
    }

    .product-detail-item {
        margin-bottom: 1.25rem;
        flex-direction: column;
    }

    .detail-label {
        min-width: auto;
        margin-right: 0;
        margin-bottom: 0.5rem;
        font-size: 0.9rem;
    }

    .detail-value {
        font-size: 0.95rem;
    }

    .modal-contact-text {
        margin-top: 1.5rem;
        padding-top: 1.25rem;
        font-size: 0.9rem;
    }

    .modal-confirm-btn {
        width: 100%;
        padding: 12px 30px;
        font-size: 1rem;
    }

    /* 页脚移动端优化 */
    .footer {
        padding: 2rem 0 1rem;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        margin-bottom: 1.5rem;
    }

    .footer-section h3 {
        font-size: 1.1rem;
        margin-bottom: 0.75rem;
    }

    .footer-section p {
        font-size: 0.9rem;
    }

    .footer-bottom {
        padding-top: 1.5rem;
        font-size: 0.85rem;
    }

    /* 分类和特色服务移动端优化 */
    .categories {
        padding: 50px 0;
    }

    /* 统计数据移动端优化 */
    .stats {
        padding: 40px 0;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }

    .stat-item {
        padding: 1.5rem 0.5rem;
    }

    .stat-number {
        font-size: 2rem;
    }

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

    .stat-item p {
        font-size: 0.95rem;
    }

    /* 热门产品移动端优化 */
    .featured-products {
        padding: 50px 0;
    }

    .product-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: 1rem;
    }

    /* 客户评价移动端优化 */
    .testimonials {
        padding: 50px 0;
    }

    .testimonial-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .testimonial-card {
        padding: 1.5rem;
    }

    /* 返回顶部按钮移动端优化 */
    .back-to-top {
        width: 45px;
        height: 45px;
        bottom: 20px;
        right: 20px;
        font-size: 1.3rem;
    }
}

/* 超小屏幕优化 (小于480px) */
@media (max-width: 480px) {
    .container {
        padding: 0 10px;
    }

    .hero {
        height: 350px;
    }

    .hero-content h2 {
        font-size: 1.5rem;
    }

    .hero-content p {
        font-size: 0.85rem;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .page-header h1 {
        font-size: 1.5rem;
    }

    .content-section {
        padding: 1.25rem;
    }

    .filter-btn {
        min-width: 100%;
        margin-bottom: 0.5rem;
    }

    .category-filter {
        flex-direction: column;
    }

    .product-grid {
        gap: 1rem;
    }

    .modal-content {
        width: 98%;
        border-radius: 8px;
    }

    .modal-header,
    .modal-body,
    .modal-footer {
        padding: 1rem;
    }

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

    .stat-number {
        font-size: 1.8rem;
    }

    .back-to-top {
        width: 40px;
        height: 40px;
        bottom: 15px;
        right: 15px;
        font-size: 1.2rem;
    }
}