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

body {
    font-family: 'Noto Sans SC', sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
}

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

/* 导航栏样式 */
.navbar {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 15px;
}

.nav-logo .logo {
    height: 50px;
    width: auto;
}

.nav-logo-text {
    text-decoration: none;
    color: #333;
    font-size: 18px;
    font-weight: 600;
    transition: color 0.3s ease;
}

.nav-logo-text:hover {
    color: #007bff;
}

.nav-menu {
    display: flex;
    align-items: center;
}

.nav-list {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-item {
    position: relative;
    margin: 0 20px;
}

.nav-link {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    padding: 10px 0;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: #007bff;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: #007bff;
    transition: width 0.3s ease;
}

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

.dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    background: #fff;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    border-radius: 5px;
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    list-style: none;
    padding: 10px 0;
}

.nav-item:hover .dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown li {
    padding: 0;
}

.dropdown a {
    display: block;
    padding: 10px 20px;
    color: #333;
    text-decoration: none;
    transition: background 0.3s ease;
}

.dropdown a:hover {
    background: #f8f9fa;
    color: #007bff;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

.language-selector {
    cursor: pointer;
    padding: 5px 10px;
    border: 1px solid #ddd;
    border-radius: 3px;
    font-size: 14px;
}

.auth-link {
    text-decoration: none;
    color: #007bff;
    font-weight: 500;
    padding: 8px 16px;
    border: 1px solid #007bff;
    border-radius: 5px;
    transition: all 0.3s ease;
}

.auth-link:hover {
    background: #007bff;
    color: #fff;
}

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

.hamburger span {
    width: 25px;
    height: 3px;
    background: #333;
    margin: 3px 0;
    transition: 0.3s;
}

/* 主横幅样式 */
.hero-section {
    background: linear-gradient(135deg, rgba(102,126,234,0.6) 0%, rgba(118,75,162,0.6) 100%), url('images/fir.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    color: #fff;
    padding: 120px 0 80px;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 2rem;
    font-weight: 500;
    margin-bottom: 15px;
    color: #f0f0f0;
}

.hero-description {
    font-size: 1.2rem;
    margin-bottom: 30px;
    color: #e0e0e0;
}

.hero-features {
    margin-bottom: 30px;
}

.feature {
    background: rgba(255,255,255,0.1);
    padding: 15px 20px;
    margin-bottom: 15px;
    border-radius: 8px;
    backdrop-filter: blur(10px);
}

.feature p {
    margin: 0;
    font-size: 1.1rem;
}

.hero-tagline {
    font-size: 1rem;
    line-height: 1.8;
    color: #d0d0d0;
}

.hero-image img {
    width: 100%;
    height: auto;
    border-radius: 15px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.3);
}

/* 关于我们样式 */
.about-section {
    padding: 80px 0;
    background: #f8f9fa;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 50px;
    color: #333;
}

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 60px;
    align-items: start;
}

.about-text p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 20px;
    color: #555;
}

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

.stat-item {
    text-align: center;
    padding: 30px 20px;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

.stat-item:hover {
    transform: translateY(-5px);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: #007bff;
    margin-bottom: 10px;
}

.stat-label {
    font-size: 1rem;
    color: #666;
    font-weight: 500;
}

/* 产品中心样式 */
.products-section {
    padding: 80px 0;
    background: #fff;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    margin-bottom: 50px;
}

.product-card {
    background: #fff;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.15);
}

.product-image {
    height: 250px;
    overflow: hidden;
}

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

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

.product-content {
    padding: 30px;
}

.product-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: #333;
}

.product-description {
    font-size: 1.1rem;
    color: #007bff;
    margin-bottom: 15px;
    font-weight: 500;
}

.product-details {
    font-size: 1rem;
    line-height: 1.6;
    color: #666;
    margin-bottom: 20px;
}

.product-link {
    display: inline-block;
    padding: 12px 25px;
    background: #007bff;
    color: #fff;
    text-decoration: none;
    border-radius: 25px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.product-link:hover {
    background: #0056b3;
    transform: translateY(-2px);
}

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

.view-more-btn {
    display: inline-block;
    padding: 15px 40px;
    background: transparent;
    color: #007bff;
    text-decoration: none;
    border: 2px solid #007bff;
    border-radius: 30px;
    font-weight: 500;
    font-size: 1.1rem;
    transition: all 0.3s ease;
}

.view-more-btn:hover {
    background: #007bff;
    color: #fff;
}

/* 解决方案样式 */
.solutions-section {
    padding: 80px 0;
    background: #f8f9fa;
}

.solutions-tabs {
    max-width: 1000px;
    margin: 0 auto;
}

.tab-buttons {
    display: flex;
    justify-content: center;
    margin-bottom: 50px;
    gap: 20px;
}

.tab-btn {
    padding: 15px 30px;
    background: #fff;
    border: 2px solid #ddd;
    border-radius: 30px;
    font-size: 1.1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.tab-btn.active,
.tab-btn:hover {
    background: #007bff;
    color: #fff;
    border-color: #007bff;
}

.tab-content {
    position: relative;
}

.tab-panel {
    display: none;
    animation: fadeIn 0.5s ease;
}

.tab-panel.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.solution-intro {
    text-align: center;
    margin-bottom: 50px;
    padding: 30px;
    background: #fff;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.solution-intro p {
    font-size: 1.2rem;
    line-height: 1.8;
    color: #555;
}

.solution-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.solution-item {
    background: #fff;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

.solution-item:hover {
    transform: translateY(-5px);
}

.solution-item h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 15px;
    color: #333;
}

.solution-item p {
    font-size: 1rem;
    line-height: 1.6;
    color: #666;
    margin-bottom: 20px;
}

.learn-more {
    display: inline-block;
    padding: 8px 20px;
    background: #007bff;
    color: #fff;
    text-decoration: none;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: background 0.3s ease;
}

.learn-more:hover {
    background: #0056b3;
}

.medical-solutions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.medical-item {
    background: #fff;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

.medical-item:hover {
    transform: translateY(-5px);
}

.medical-item h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 15px;
    color: #333;
}

.medical-item p {
    font-size: 1rem;
    line-height: 1.6;
    color: #666;
    margin-bottom: 20px;
}

/* 页脚样式 */
.footer {
    background: #2c3e50;
    color: #fff;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 20px;
    color: #fff;
}

.footer-section p {
    color: #bdc3c7;
    line-height: 1.6;
    margin-bottom: 10px;
}

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

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section ul li a {
    color: #bdc3c7;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: #3498db;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #34495e;
    color: #95a5a6;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .hamburger {
        display: flex;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.5rem;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .stats {
        grid-template-columns: 1fr;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .solution-grid {
        grid-template-columns: 1fr;
    }
    
    .medical-solutions {
        grid-template-columns: 1fr;
    }
    
    .tab-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .product-content {
        padding: 20px;
    }
    
    .solution-item,
    .medical-item {
        padding: 20px;
    }
}