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

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.top-bar {
    background-color: #2c3e50;
    color: #fff;
    padding: 10px 0;
    font-size: 14px;
}

.top-bar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

.top-bar a {
    color: #fff;
    text-decoration: none;
}

.top-bar a:hover {
    color: #3498db;
}

.weibo-icon {
    margin-right: 5px;
}

.header {
    background-color: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    padding: 15px 0;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo img {
    height: 50px;
}

.logo-text {
    display: flex;
    align-items: center;
    font-size: 18px;
    font-weight: bold;
    color: #2c3e50;
}

.logo-text sup {
    color: #e74c3c;
    font-size: 12px;
}

.logo-subtitle {
    font-size: 14px;
    color: #3498db;
    margin-left: 10px;
}

.navbar {
    display: flex;
    gap: 30px;
    flex-wrap: wrap;
}

.navbar a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s;
}

.navbar a:hover,
.navbar a.active {
    color: #3498db;
}

.banner {
    position: relative;
    height: 400px;
    overflow: hidden;
}

.banner img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.banner-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: #fff;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.banner-content h1 {
    font-size: 36px;
    margin-bottom: 15px;
}

.banner-content p {
    font-size: 18px;
}

.banner-dots {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
}

.banner-dots span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: background-color 0.3s;
}

.banner-dots span.active {
    background-color: #fff;
}

.section {
    padding: 50px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 40px;
}

.section-title h2 {
    font-size: 28px;
    color: #2c3e50;
    margin-bottom: 10px;
}

.section-title .line {
    width: 80px;
    height: 3px;
    background-color: #3498db;
    margin: 0 auto;
}

.about-summary {
    background-color: #fff;
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
}

.about-summary p {
    font-size: 16px;
    color: #555;
    text-align: justify;
    margin-bottom: 15px;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.product-card {
    background-color: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s, box-shadow 0.3s;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 25px rgba(0, 0, 0, 0.15);
}

.product-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.product-card h3 {
    padding: 15px;
    font-size: 18px;
    color: #2c3e50;
    text-align: center;
}

.product-card p {
    padding: 0 15px 15px;
    font-size: 14px;
    color: #666;
    text-align: center;
}

.applications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.application-item {
    background-color: #fff;
    padding: 25px;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    transition: background-color 0.3s;
}

.application-item:hover {
    background-color: #3498db;
    color: #fff;
}

.application-item i {
    font-size: 32px;
    margin-bottom: 10px;
}

.faq-section {
    background-color: #fff;
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
}

.faq-item {
    border-bottom: 1px solid #eee;
    padding: 20px 0;
}

.faq-item:last-child {
    border-bottom: none;
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    font-size: 16px;
    font-weight: 500;
    color: #2c3e50;
}

.faq-question:hover {
    color: #3498db;
}

.faq-question i {
    transition: transform 0.3s;
}

.faq-question.active i {
    transform: rotate(180deg);
}

.faq-answer {
    display: none;
    padding-top: 15px;
    font-size: 14px;
    color: #666;
    line-height: 1.8;
}

.faq-answer.active {
    display: block;
}

.footer {
    background-color: #2c3e50;
    color: #fff;
    padding: 40px 0;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-bottom: 30px;
}

.footer-section h4 {
    margin-bottom: 20px;
    color: #3498db;
}

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

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

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

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

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #34495e;
    font-size: 14px;
    color: #ccc;
}

.footer-bottom a {
    color: #3498db;
    text-decoration: none;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.contact-item {
    background-color: #fff;
    padding: 30px;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
}

.contact-item i {
    font-size: 36px;
    color: #3498db;
    margin-bottom: 15px;
}

.contact-item h4 {
    margin-bottom: 10px;
    color: #2c3e50;
}

.contact-item p {
    color: #666;
}

.contact-item a {
    color: #3498db;
    text-decoration: none;
}

.qr-code {
    text-align: center;
    margin-top: 20px;
}

.qr-code img {
    width: 150px;
    height: 150px;
    border: 1px solid #eee;
    padding: 10px;
    border-radius: 8px;
}

.qr-code p {
    margin-top: 10px;
    color: #666;
}

.douyin-section {
    background-color: #fff;
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
    text-align: center;
}

.douyin-section h3 {
    margin-bottom: 30px;
    color: #2c3e50;
}

.douyin-accounts {
    display: flex;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
}

.douyin-item img {
    width: 150px;
    height: 150px;
    border: 1px solid #eee;
    padding: 10px;
    border-radius: 8px;
}

.douyin-item p {
    margin-top: 10px;
    color: #666;
}

@media (max-width: 768px) {
    .top-bar .container {
        flex-direction: column;
        text-align: center;
    }
    
    .header .container {
        flex-direction: column;
    }
    
    .navbar {
        justify-content: center;
    }
    
    .banner {
        height: 250px;
    }
    
    .banner-content h1 {
        font-size: 24px;
    }
    
    .banner-content p {
        font-size: 14px;
    }
    
    .about-summary,
    .faq-section {
        padding: 20px;
    }
    
    .section {
        padding: 30px 0;
    }
}