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

body {
    font-family: 'Microsoft YaHei', '微软雅黑', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

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

header {
    background-color: #0066cc;
    color: white;
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

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

.logo img {
    height: 50px;
    width: auto;
}

.logo-text {
    display: flex;
    align-items: center;
}

.company-name {
    font-size: 24px;
    font-weight: bold;
    color: white;
}

.divider {
    font-size: 20px;
    color: #ffcc00;
    margin: 0 12px;
}

.slogan {
    font-size: 16px;
    color: #ffcc00;
}

nav ul {
    list-style: none;
    display: flex;
}

nav ul li {
    margin-left: 30px;
}

nav ul li a {
    color: white;
    text-decoration: none;
    font-size: 16px;
    transition: color 0.3s;
}

nav ul li a:hover {
    color: #ffcc00;
}

.banner {
    padding: 0;
    height: 500px;
    overflow: hidden;
}

.banner-slider {
    position: relative;
    width: 100%;
    height: 100%;
}

.banner-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    opacity: 0;
    transition: opacity 1s ease-in-out;
}

.banner-slide.active {
    opacity: 1;
}

.banner-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 102, 204, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
}

.banner-content {
    text-align: center;
    color: white;
    z-index: 10;
}

.banner-content h2 {
    font-size: 42px;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.banner-content p {
    font-size: 22px;
    opacity: 0.95;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
}

.banner-dots {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 15px;
    z-index: 20;
}

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

.dot:hover {
    background-color: rgba(255, 255, 255, 0.8);
    transform: scale(1.2);
}

.dot.active {
    background-color: #ffcc00;
    transform: scale(1.2);
}

.about {
    padding: 60px 0;
    background-color: white;
}

.about h2 {
    text-align: center;
    font-size: 32px;
    color: #0066cc;
    margin-bottom: 40px;
}

.about-content {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    gap: 50px;
    align-items: center;
}

.about-text {
    flex: 1;
    min-width: 0;
}

.about-text p {
    margin-bottom: 18px;
    text-align: justify;
    line-height: 1.9;
    color: #555;
    font-size: 15px;
}

.about-image {
    flex-shrink: 0;
    width: 450px;
}

.about-image img {
    width: 100%;
    height: auto;
    max-height: 340px;
    object-fit: cover;
    border-radius: 8px;
    box-shadow: 0 8px 30px rgba(0, 102, 204, 0.15);
}

@media (max-width: 992px) {
    .about-content {
        flex-direction: column;
        gap: 35px;
    }
    
    .about-image {
        width: 100%;
        max-width: 500px;
        order: -1;
        margin: 0 auto;
    }
}

.products {
    padding: 60px 0;
    background-color: #f5f5f5;
}

.products h2 {
    text-align: center;
    font-size: 32px;
    color: #0066cc;
    margin-bottom: 40px;
}

.applications {
    padding: 60px 0;
    background-color: #f0f7ff;
}

.applications h2 {
    text-align: center;
    font-size: 32px;
    color: #0066cc;
    margin-bottom: 15px;
}

.applications .section-desc {
    text-align: center;
    color: #666;
    font-size: 16px;
    margin-bottom: 45px;
}

.app-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 25px;
    max-width: 1200px;
    margin: 0 auto;
}

.app-item {
    background-color: white;
    padding: 35px 25px 30px;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 4px 15px rgba(0, 102, 204, 0.08);
    transition: all 0.3s ease;
    border: 1px solid #e8f0fe;
}

.app-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 30px rgba(0, 102, 204, 0.15);
    border-color: #0066cc;
}

.app-icon {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 72px;
    height: 72px;
    margin: 0 auto 18px;
    background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
    border-radius: 50%;
    padding: 12px;
    box-sizing: border-box;
}

.app-icon svg {
    width: 100%;
    height: 100%;
    max-width: 48px;
    max-height: 48px;
}

.app-item h3 {
    font-size: 18px;
    color: #333;
    margin-bottom: 12px;
    font-weight: 600;
}

.app-item p {
    font-size: 14px;
    color: #666;
    line-height: 1.7;
    margin: 0;
}

.faq {
    padding: 60px 0;
    background-color: white;
}

.faq h2 {
    text-align: center;
    font-size: 32px;
    color: #0066cc;
    margin-bottom: 40px;
}

.faq-list {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: 20px;
    border: 1px solid #e0e0e0;
    border-radius: 10px;
    overflow: hidden;
    transition: box-shadow 0.3s;
}

.faq-item:hover {
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.faq-question {
    display: flex;
    align-items: center;
    padding: 20px 25px;
    background-color: #f8f9fa;
    cursor: pointer;
    transition: background-color 0.3s;
}

.faq-question:hover {
    background-color: #e9ecef;
}

.faq-icon {
    display: inline-block;
    width: 40px;
    height: 40px;
    line-height: 40px;
    text-align: center;
    background-color: #0066cc;
    color: white;
    font-weight: bold;
    border-radius: 50%;
    margin-right: 15px;
    flex-shrink: 0;
}

.faq-question h3 {
    margin: 0;
    font-size: 18px;
    color: #333;
    font-weight: 600;
}

.faq-answer {
    padding: 20px 25px;
    background-color: white;
    display: none;
    border-top: 1px solid #e0e0e0;
}

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

.faq-item.active .faq-question {
    background-color: #e3f2fd;
}

.faq-answer p {
    margin: 0;
    color: #555;
    font-size: 15px;
    line-height: 1.8;
}

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

.product-item {
    background-color: white;
    padding: 20px;
    text-align: center;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s, box-shadow 0.3s;
    overflow: hidden;
}

.product-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.product-image {
    width: 100%;
    height: 180px;
    overflow: hidden;
    border-radius: 8px;
    margin-bottom: 15px;
    background-color: #f5f5f5;
}

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

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

.product-item h3 {
    font-size: 18px;
    color: #333;
    margin-bottom: 10px;
}

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

.materials {
    padding: 60px 0;
    background-color: white;
}

.materials h2 {
    text-align: center;
    font-size: 32px;
    color: #0066cc;
    margin-bottom: 40px;
}

.materials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 20px;
}

.material-item {
    background-color: #e6f3ff;
    padding: 20px;
    text-align: center;
    border-radius: 5px;
    font-size: 16px;
    color: #0066cc;
    transition: background-color 0.3s, color 0.3s;
}

.material-item:hover {
    background-color: #0066cc;
    color: white;
}

.technology {
    padding: 60px 0;
    background-color: #f5f5f5;
}

.technology h2 {
    text-align: center;
    font-size: 32px;
    color: #0066cc;
    margin-bottom: 40px;
}

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

.tech-item {
    background-color: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.tech-item h3 {
    font-size: 20px;
    color: #0066cc;
    margin-bottom: 15px;
}

.tech-item p {
    color: #666;
    line-height: 1.8;
}

.contact {
    padding: 60px 0;
    background-color: white;
}

.contact h2 {
    text-align: center;
    font-size: 32px;
    color: #0066cc;
    margin-bottom: 40px;
}

.contact-content {
    max-width: 100%;
}

.contact-main {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 40px;
    flex-wrap: wrap;
}

.contact-info {
    flex: 1;
    min-width: 300px;
}

.contact-info h3 {
    font-size: 24px;
    color: #0066cc;
    margin-bottom: 20px;
}

.contact-details {
    list-style: none;
}

.contact-details li {
    margin-bottom: 12px;
    font-size: 16px;
    color: #555;
}

.contact-details .label {
    color: #333;
    font-weight: bold;
    display: inline-block;
    width: 80px;
}

.contact-details a {
    color: #0066cc;
    text-decoration: none;
}

.contact-details a:hover {
    text-decoration: underline;
}

.contact-wechat {
    text-align: center;
    background-color: #f9f9f9;
    padding: 30px;
    border-radius: 10px;
}

.contact-wechat h4 {
    font-size: 20px;
    color: #333;
    margin-bottom: 15px;
}

.contact-wechat img {
    width: 150px;
    height: 150px;
    border: 1px solid #ddd;
    margin-bottom: 10px;
}

.contact-wechat p {
    color: #666;
    font-size: 14px;
}

.friend-links {
    background-color: #f0f0f0;
    padding: 30px 0;
    border-top: 1px solid #e0e0e0;
}

.friend-links h3 {
    text-align: center;
    font-size: 18px;
    color: #333;
    margin-bottom: 20px;
}

.links-list {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
}

.links-list a {
    color: #0066cc;
    text-decoration: none;
    font-size: 14px;
    padding: 8px 16px;
    background-color: white;
    border-radius: 20px;
    transition: all 0.3s;
    border: 1px solid #ddd;
}

.links-list a:hover {
    color: #ffcc00;
    background-color: #0066cc;
    border-color: #0066cc;
}

footer {
    background-color: #333;
    color: white;
    padding: 30px 0;
    text-align: center;
}

footer p {
    color: #ccc;
    font-size: 14px;
    line-height: 1.8;
}

footer a {
    color: #ffcc00;
    text-decoration: none;
    transition: color 0.3s;
}

footer a:hover {
    color: #fff;
    text-decoration: underline;
}

.footer-contact {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid #444;
}

.footer-contact p {
    margin-bottom: 10px;
    font-size: 14px;
    color: #bbb;
}

.footer-contact .contact-label {
    color: #ddd;
}

.footer-contact a {
    color: #ffcc00;
    font-weight: 500;
}

.footer-contact .contact-divider {
    margin: 0 12px;
    color: #666;
}

.footer-contact .address-item,
.footer-contact .factory-item {
    font-size: 13px;
    color: #999;
    margin-bottom: 6px;
}

.footer-keywords {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid #444;
}

.footer-keywords .keywords-title {
    display: inline-block;
    color: #ddd;
    font-size: 14px;
    margin-bottom: 10px;
}

.footer-keywords .keywords-list {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0;
    font-size: 13px;
}

.footer-keywords .keywords-list a {
    color: #aaa;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-keywords .keywords-list a:hover {
    color: #ffcc00;
    text-decoration: underline;
}

.footer-keywords .keyword-divider {
    margin: 0 10px;
    color: #555;
}

@media (max-width: 768px) {
    header .container {
        flex-direction: column;
        gap: 20px;
    }

    nav ul {
        flex-wrap: wrap;
        justify-content: center;
    }

    nav ul li {
        margin: 5px 15px;
    }

    .banner h2 {
        font-size: 28px;
    }

    .banner p {
        font-size: 16px;
    }

    .about h2,
    .products h2,
    .materials h2,
    .technology h2,
    .contact h2 {
        font-size: 26px;
    }
}