/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 主色调 - 深蓝色系，体现专业和科技感 */
    --primary-color: #1e3a8a;
    --primary-light: #3b82f6;
    --primary-dark: #1e40af;
    
    /* 辅助色 - 绿色系，体现生物科技和环保 */
    --secondary-color: #059669;
    --secondary-light: #10b981;
    --secondary-dark: #047857;
    
    /* 强调色 - 橙色，用于CTA按钮和重要元素 */
    --accent-color: #ea580c;
    --accent-light: #fb923c;
    --accent-dark: #c2410c;
    
    /* 中性色 */
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-tertiary: #f3f4f6;
    --border-color: #e5e7eb;
    
    /* 阴影 */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* 字体 */
    --font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
}

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* 导航栏 */
.navbar {
    background: var(--bg-primary);
    box-shadow: var(--shadow-sm);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

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

.logo {
    height: 40px;
    width: auto;
}

.logo-text {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--primary-color);
}

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

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

.nav-link:hover {
    color: var(--primary-color);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.bar {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    margin: 3px 0;
    transition: 0.3s;
}

/* Hero区域 */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    color: white;
    padding: 120px 0 80px;
    margin-top: 70px;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: var(--font-size-lg);
    margin-bottom: 2rem;
    opacity: 0.9;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
}

.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: var(--font-size-base);
}

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

.btn-primary:hover {
    background: var(--accent-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

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

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-main-image {
    width: 100%;
    height: 300px;
    object-fit: cover;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    cursor: pointer;
    transition: transform 0.3s ease;
}

.hero-main-image:hover {
    transform: scale(1.02);
}

.hero-placeholder {
    width: 100%;
    height: 300px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-lg);
    border: 2px dashed rgba(255, 255, 255, 0.3);
}

/* 通用区域样式 */
section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: 3rem;
    color: var(--text-primary);
}

/* 四大卖点 */
.features {
    background: var(--bg-secondary);
}

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

.feature-card {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

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

.feature-card h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 产品展示 */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.product-card {
    background: var(--bg-primary);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

.product-image {
    height: 200px;
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.product-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
    cursor: pointer;
}

.product-card:hover .product-img {
    transform: scale(1.05);
}

/* 图片放大模态框 */
.image-modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    animation: fadeIn 0.3s ease;
}

.image-modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    max-width: 90%;
    max-height: 90%;
    object-fit: contain;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    animation: zoomIn 0.3s ease;
}

.modal-close {
    position: absolute;
    top: 20px;
    right: 30px;
    color: white;
    font-size: 40px;
    font-weight: bold;
    cursor: pointer;
    z-index: 2001;
    transition: color 0.3s ease;
}

.modal-close:hover {
    color: var(--accent-color);
}

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

@keyframes zoomIn {
    from { transform: scale(0.5); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

.product-placeholder {
    color: var(--text-light);
    font-size: var(--font-size-lg);
    font-weight: 500;
}

.product-content {
    padding: 1.5rem;
}

.product-content h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

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

.product-link {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}

.product-link:hover {
    color: var(--accent-dark);
}

/* 解决方案 */
.solutions {
    background: var(--bg-secondary);
}

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

.solution-card {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

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

.solution-card h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.solution-card p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.solution-link {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}

.solution-link:hover {
    color: var(--accent-dark);
}

/* 社会证明 */
.testimonials {
    background: var(--primary-color);
    color: white;
}

.testimonials .section-title {
    color: white;
}

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

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

.testimonial-number {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--accent-light);
}

.testimonial-label {
    font-size: var(--font-size-lg);
    opacity: 0.9;
}

/* 联系我们 */
.contact {
    background: var(--bg-secondary);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.contact-info h2 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.contact-info p {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: var(--font-size-lg);
}

.contact-icon {
    font-size: 1.5rem;
}

.contact-form {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
}

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: var(--font-size-base);
    transition: border-color 0.3s ease;
    font-family: var(--font-family);
}

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

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

/* 页脚 */
.footer {
    background: var(--text-primary);
    color: 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,
.footer-section h4 {
    margin-bottom: 1rem;
    color: var(--accent-light);
}

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

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

.footer-section a {
    color: var(--text-light);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.footer-bottom {
    border-top: 1px solid var(--text-light);
    padding-top: 1rem;
    text-align: center;
    color: var(--text-light);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--bg-primary);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow-md);
        padding: 2rem 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }
    
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .hero-buttons {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .features-grid,
    .products-grid,
    .solutions-grid {
        grid-template-columns: 1fr;
    }
    
    .testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    section {
        padding: 60px 0;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 0.5rem;
    }
    
    .hero {
        padding: 100px 0 60px;
    }
    
    .hero-title {
        font-size: var(--font-size-2xl);
    }
    
    .section-title {
        font-size: var(--font-size-2xl);
    }
    
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .btn {
        padding: 10px 20px;
        font-size: var(--font-size-sm);
    }
}

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

.feature-card,
.product-card,
.solution-card {
    animation: fadeInUp 0.6s ease-out;
}

/* 滚动行为 */
html {
    scroll-behavior: smooth;
}

/* 加载状态 */
.loading {
    opacity: 0.7;
    pointer-events: none;
}

/* 焦点样式 */
.btn:focus,
.nav-link:focus,
input:focus,
textarea:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* 产品页面样式 */
.product-page {
    margin-top: 70px;
}

.breadcrumb {
    margin-bottom: 2rem;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.breadcrumb a {
    color: var(--primary-color);
    text-decoration: none;
}

.breadcrumb a:hover {
    text-decoration: underline;
}

.product-hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    color: white;
    padding: 60px 0;
}

.product-hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.product-hero h1 {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: 1rem;
}

.product-subtitle {
    font-size: var(--font-size-lg);
    margin-bottom: 2rem;
    opacity: 0.9;
}

.product-highlights {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 2rem;
}

.highlight-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: var(--font-size-lg);
}

.highlight-icon {
    font-size: 1.5rem;
}

.product-actions {
    display: flex;
    gap: 1rem;
}

.product-hero-img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    cursor: pointer;
    transition: transform 0.3s ease;
}

.product-hero-img:hover {
    transform: scale(1.02);
}

.product-image-placeholder {
    width: 100%;
    height: 300px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-lg);
    border: 2px dashed rgba(255, 255, 255, 0.3);
}

.product-overview {
    padding: 80px 0;
    background: var(--bg-secondary);
}

.product-overview h2 {
    text-align: center;
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: 3rem;
    color: var(--text-primary);
}

.overview-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
}

.overview-text p {
    font-size: var(--font-size-lg);
    line-height: 1.8;
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
}

.overview-features h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.overview-features ul {
    list-style: none;
}

.overview-features li {
    padding: 0.5rem 0;
    color: var(--text-secondary);
    position: relative;
    padding-left: 1.5rem;
}

.overview-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--secondary-color);
    font-weight: bold;
}

.specifications {
    padding: 80px 0;
}

.specifications h2 {
    text-align: center;
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: 3rem;
    color: var(--text-primary);
}

.spec-tables {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
}

.spec-table {
    background: var(--bg-primary);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: var(--shadow-md);
}

.spec-table h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
    text-align: center;
}

.spec-table table {
    width: 100%;
    border-collapse: collapse;
}

.spec-table td {
    padding: 0.75rem;
    border-bottom: 1px solid var(--border-color);
    font-size: var(--font-size-base);
}

.spec-table td:first-child {
    font-weight: 600;
    color: var(--text-primary);
    width: 40%;
}

.spec-table td:last-child {
    color: var(--text-secondary);
}

.product-advantages {
    padding: 80px 0;
    background: var(--bg-secondary);
}

.product-advantages h2 {
    text-align: center;
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: 3rem;
    color: var(--text-primary);
}

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

.advantage-card {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

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

.advantage-card h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.advantage-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

.related-products {
    padding: 80px 0;
}

.related-products h2 {
    text-align: center;
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: 3rem;
    color: var(--text-primary);
}

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

.related-item {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.related-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.related-item h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.related-item p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.related-link {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}

.related-link:hover {
    color: var(--accent-dark);
}

.downloads {
    padding: 80px 0;
    background: var(--bg-secondary);
}

.downloads h2 {
    text-align: center;
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: 3rem;
    color: var(--text-primary);
}

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

.download-item {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.download-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

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

.download-item h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.download-item p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.download-link {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}

.download-link:hover {
    color: var(--accent-dark);
}

.faq {
    padding: 80px 0;
}

.faq h2 {
    text-align: center;
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: 3rem;
    color: var(--text-primary);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--bg-primary);
    margin-bottom: 1rem;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.faq-item h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    padding: 1.5rem;
    margin: 0;
    color: var(--primary-color);
    background: var(--bg-secondary);
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.faq-item h3:hover {
    background: var(--bg-tertiary);
}

.faq-item p {
    padding: 0 1.5rem 1.5rem;
    margin: 0;
    color: var(--text-secondary);
    line-height: 1.6;
}

.product-cta {
    padding: 80px 0;
    background: var(--primary-color);
    color: white;
    text-align: center;
}

.product-cta h2 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: 1rem;
}

.product-cta p {
    font-size: var(--font-size-lg);
    margin-bottom: 2rem;
    opacity: 0.9;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

/* 响应式设计 - 产品页面 */
@media (max-width: 768px) {
    .product-hero-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }
    
    .overview-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .spec-tables {
        grid-template-columns: 1fr;
    }
    
    .advantages-grid,
    .related-grid,
    .download-grid {
        grid-template-columns: 1fr;
    }
    
    .product-actions,
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .product-hero h1 {
        font-size: var(--font-size-3xl);
    }
}

/* 解决方案页面样式 */
.solution-page {
    margin-top: 70px;
}

.solution-hero {
    background: linear-gradient(135deg, var(--secondary-color) 0%, var(--secondary-light) 100%);
    color: white;
    padding: 60px 0;
}

.solution-hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.solution-hero h1 {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: 1rem;
}

.solution-subtitle {
    font-size: var(--font-size-lg);
    margin-bottom: 2rem;
    opacity: 0.9;
}

.solution-highlights {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 2rem;
}

.solution-actions {
    display: flex;
    gap: 1rem;
}

.solution-image-placeholder {
    width: 100%;
    height: 300px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-lg);
    border: 2px dashed rgba(255, 255, 255, 0.3);
}

.challenges {
    padding: 80px 0;
    background: var(--bg-secondary);
}

.challenges h2 {
    text-align: center;
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: 3rem;
    color: var(--text-primary);
}

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

.challenge-card {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

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

.challenge-card h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.challenge-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

.solution-approach {
    padding: 80px 0;
}

.solution-approach h2 {
    text-align: center;
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: 3rem;
    color: var(--text-primary);
}

.approach-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
}

.approach-text h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.approach-text p {
    font-size: var(--font-size-lg);
    line-height: 1.8;
    margin-bottom: 2rem;
    color: var(--text-secondary);
}

.approach-features h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.approach-features ul {
    list-style: none;
}

.approach-features li {
    padding: 0.5rem 0;
    color: var(--text-secondary);
    position: relative;
    padding-left: 1.5rem;
}

.approach-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--secondary-color);
    font-weight: bold;
}

.product-combination {
    padding: 80px 0;
    background: var(--bg-secondary);
}

.product-combination h2 {
    text-align: center;
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: 3rem;
    color: var(--text-primary);
}

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

.combination-item {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.combination-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

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

.combination-item h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.combination-item > p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.combination-item ul {
    list-style: none;
    margin-bottom: 1.5rem;
}

.combination-item li {
    padding: 0.25rem 0;
    color: var(--text-secondary);
    position: relative;
    padding-left: 1.5rem;
}

.combination-item li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--accent-color);
    font-weight: bold;
}

.combination-benefits {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.benefit-tag {
    background: var(--accent-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.implementation {
    padding: 80px 0;
}

.implementation h2 {
    text-align: center;
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: 3rem;
    color: var(--text-primary);
}

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

.step {
    text-align: center;
    position: relative;
}

.step-number {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--primary-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin: 0 auto 1rem;
}

.step-content h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.step-content p {
    color: var(--text-secondary);
    line-height: 1.6;
}

.cost-benefit {
    padding: 80px 0;
    background: var(--bg-secondary);
}

.cost-benefit h2 {
    text-align: center;
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: 3rem;
    color: var(--text-primary);
}

.benefit-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
    align-items: center;
}

.benefit-text h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.benefit-text p {
    font-size: var(--font-size-lg);
    line-height: 1.8;
    margin-bottom: 2rem;
    color: var(--text-secondary);
}

.benefit-metrics {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.metric-item {
    text-align: center;
    padding: 1.5rem;
    background: var(--bg-primary);
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
}

.metric-number {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--accent-color);
    margin-bottom: 0.5rem;
}

.metric-label {
    color: var(--text-secondary);
    font-size: var(--font-size-lg);
}

.success-cases {
    padding: 80px 0;
}

.success-cases h2 {
    text-align: center;
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: 3rem;
    color: var(--text-primary);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
}

.case-item {
    background: var(--bg-primary);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.case-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.case-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.case-header h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--primary-color);
    margin: 0;
}

.case-tag {
    background: var(--secondary-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: var(--font-size-sm);
    font-weight: 500;
}

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

.solution-cta {
    padding: 80px 0;
    background: var(--secondary-color);
    color: white;
    text-align: center;
}

.solution-cta h2 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: 1rem;
}

.solution-cta p {
    font-size: var(--font-size-lg);
    margin-bottom: 2rem;
    opacity: 0.9;
}

/* 响应式设计 - 解决方案页面 */
@media (max-width: 768px) {
    .solution-hero-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }
    
    .approach-content,
    .benefit-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .challenges-grid,
    .combination-grid,
    .cases-grid {
        grid-template-columns: 1fr;
    }
    
    .implementation-steps {
        grid-template-columns: 1fr;
    }
    
    .solution-actions,
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .solution-hero h1 {
        font-size: var(--font-size-3xl);
    }
    
    .benefit-metrics {
        flex-direction: row;
        justify-content: space-around;
    }
}

/* 关于我们和联系我们页面样式 */
.about-page,
.contact-page {
    margin-top: 70px;
}

.about-hero,
.contact-hero {
    background: linear-gradient(135deg, var(--accent-color) 0%, var(--accent-light) 100%);
    color: white;
    padding: 60px 0;
}

.about-hero-content,
.contact-hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-hero h1,
.contact-hero h1 {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: 1rem;
}

.about-subtitle,
.contact-subtitle {
    font-size: var(--font-size-lg);
    margin-bottom: 2rem;
    opacity: 0.9;
}

.about-stats {
    display: flex;
    gap: 2rem;
    margin-top: 2rem;
}

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

.stat-number {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--accent-light);
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: var(--font-size-sm);
    opacity: 0.9;
}

.about-image-placeholder,
.contact-image-placeholder {
    width: 100%;
    height: 300px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-lg);
    border: 2px dashed rgba(255, 255, 255, 0.3);
}

.company-intro {
    padding: 80px 0;
    background: var(--bg-secondary);
}

.company-intro h2 {
    text-align: center;
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: 3rem;
    color: var(--text-primary);
}

.intro-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
}

.intro-text p {
    font-size: var(--font-size-lg);
    line-height: 1.8;
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
}

.intro-features h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.intro-features ul {
    list-style: none;
}

.intro-features li {
    padding: 0.5rem 0;
    color: var(--text-secondary);
    position: relative;
    padding-left: 1.5rem;
}

.intro-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--secondary-color);
    font-weight: bold;
}

.milestones {
    padding: 80px 0;
}

.milestones h2 {
    text-align: center;
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: 3rem;
    color: var(--text-primary);
}

.timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border-color);
    transform: translateX(-50%);
}

.timeline-item {
    display: flex;
    align-items: center;
    margin-bottom: 3rem;
    position: relative;
}

.timeline-item:nth-child(odd) {
    flex-direction: row;
}

.timeline-item:nth-child(even) {
    flex-direction: row-reverse;
}

.timeline-year {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--primary-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-lg);
    font-weight: 700;
    position: relative;
    z-index: 2;
}

.timeline-content {
    flex: 1;
    padding: 0 2rem;
    background: var(--bg-primary);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: var(--shadow-md);
}

.timeline-content h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.timeline-content p {
    color: var(--text-secondary);
    line-height: 1.6;
}

.certifications {
    padding: 80px 0;
    background: var(--bg-secondary);
}

.certifications h2 {
    text-align: center;
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: 3rem;
    color: var(--text-primary);
}

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

.cert-item {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.cert-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

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

.cert-item h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.cert-item p {
    color: var(--text-secondary);
    line-height: 1.6;
}

.team {
    padding: 80px 0;
}

.team h2 {
    text-align: center;
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: 3rem;
    color: var(--text-primary);
}

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

.team-item {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.team-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.team-avatar,
.person-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--primary-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin: 0 auto 1rem;
}

.avatar-placeholder {
    font-size: var(--font-size-lg);
}

.team-item h3,
.sales-person h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.team-title,
.person-title {
    color: var(--accent-color);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.team-desc,
.person-desc {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.person-contact {
    border-top: 1px solid var(--border-color);
    padding-top: 1rem;
}

.person-contact p {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    margin-bottom: 0.25rem;
}

.culture {
    padding: 80px 0;
    background: var(--bg-secondary);
}

.culture h2 {
    text-align: center;
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: 3rem;
    color: var(--text-primary);
}

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

.culture-item {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.culture-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

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

.culture-item h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.culture-item p {
    color: var(--text-secondary);
    line-height: 1.6;
}

.contact-cta {
    padding: 80px 0;
    background: var(--primary-color);
    color: white;
    text-align: center;
}

.contact-cta h2 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: 1rem;
}

.contact-cta p {
    font-size: var(--font-size-lg);
    margin-bottom: 2rem;
    opacity: 0.9;
}

.contact-info {
    padding: 80px 0;
    background: var(--bg-secondary);
}

.contact-info h2 {
    text-align: center;
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: 3rem;
    color: var(--text-primary);
}

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

.contact-card {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

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

.contact-card h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.contact-card p {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.contact-link {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}

.contact-link:hover {
    color: var(--accent-dark);
}

.sales-team {
    padding: 80px 0;
}

.sales-team h2 {
    text-align: center;
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: 3rem;
    color: var(--text-primary);
}

.contact-form-section {
    padding: 80px 0;
    background: var(--bg-secondary);
}

.form-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 4rem;
    align-items: start;
}

.form-info h2 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.form-info p {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.6;
}

.form-benefits {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.benefit-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
}

.benefit-icon {
    color: var(--secondary-color);
    font-weight: bold;
}

.contact-form {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: var(--font-size-base);
    transition: border-color 0.3s ease;
    font-family: var(--font-family);
}

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

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

.btn-large {
    width: 100%;
    padding: 16px 24px;
    font-size: var(--font-size-lg);
}

.service-promise {
    padding: 80px 0;
}

.service-promise h2 {
    text-align: center;
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: 3rem;
    color: var(--text-primary);
}

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

.promise-item {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.promise-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

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

.promise-item h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.promise-item p {
    color: var(--text-secondary);
    line-height: 1.6;
}

.location-map {
    padding: 80px 0;
    background: var(--bg-secondary);
}

.location-map h2 {
    text-align: center;
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: 3rem;
    color: var(--text-primary);
}

.map-container {
    max-width: 800px;
    margin: 0 auto;
}

.map-placeholder {
    width: 100%;
    height: 400px;
    background: var(--bg-primary);
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    border: 2px dashed var(--border-color);
}

.map-placeholder p {
    margin-top: 1rem;
    font-size: var(--font-size-base);
}

/* 响应式设计 - 关于我们和联系我们页面 */
@media (max-width: 768px) {
    .about-hero-content,
    .contact-hero-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }
    
    .intro-content,
    .form-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .about-stats {
        justify-content: center;
    }
    
    .timeline::before {
        left: 30px;
    }
    
    .timeline-item {
        flex-direction: row !important;
        padding-left: 60px;
    }
    
    .timeline-year {
        position: absolute;
        left: 0;
        width: 60px;
        height: 60px;
        font-size: var(--font-size-base);
    }
    
    .timeline-content {
        padding: 1rem;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .about-hero h1,
    .contact-hero h1 {
        font-size: var(--font-size-3xl);
    }
}

/* 导航链接激活状态 */
.nav-link.active {
    color: var(--primary-color);
}

.nav-link.active::after {
    width: 100%;
}