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

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
}

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

/* 导航栏 */
.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;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.logo {
    width: 140px;
    height: 100px;
    background: url(./assets/logo.png)no-repeat center;
    background-size: contain;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-menu a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-menu a:hover {
    color: #3498db;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: #3498db;
    transition: width 0.3s ease;
}

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

/* Banner轮播 */
.banner-section {
    margin-top: 50px;
    position: relative;
    overflow: hidden;
}

.banner-container {
    position: relative;
    width: 100%;
    height: 500px;
}

.banner-slide {
    display: none;
    width: 100%;
    height: 100%;
}

.banner-slide.active {
    display: block;
    animation: fadeIn 1s ease-in-out;
}

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

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

.banner-prev,
.banner-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0, 0, 0, 0.5);
    color: white;
    border: none;
    padding: 15px 20px;
    font-size: 24px;
    cursor: pointer;
    border-radius: 5px;
    transition: background 0.3s ease;
    z-index: 10;
}

.banner-prev:hover,
.banner-next:hover {
    background: rgba(0, 0, 0, 0.8);
}

.banner-prev {
    left: 20px;
}

.banner-next {
    right: 20px;
}

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

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

.dot.active,
.dot:hover {
    background: #fff;
}

/* 通用区块样式 */
section {
    padding: 40px 0;
}

.section-title {
    text-align: center;
    font-size: 36px;
    color: #2c3e50;
    margin-bottom: 50px;
    position: relative;
    padding-bottom: 20px;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, #3498db, #2ecc71);
    border-radius: 2px;
}

/* 关于我们 */
.about-section {
    background: #f8f9fa;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.about-text h3 {
    font-size: 28px;
    color: #2c3e50;
    margin-bottom: 20px;
}

.about-text p {
    font-size: 16px;
    color: #666;
    margin-bottom: 15px;
    line-height: 1.8;
}

.about-image img {
    width: 100%;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

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

/* 产品展示 */
.products-section {
    background: #fff;
}

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

.product-item {
    position: relative;
    overflow: hidden;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
    cursor: pointer;
}

.product-item:hover {
    transform: translateY(-10px);
}

.product-item img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.product-item:hover img {
    transform: scale(1.1);
}

.product-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
    padding: 20px;
    color: white;
    transform: translateY(100%);
    transition: transform 0.3s ease;
}

.product-item:hover .product-overlay {
    transform: translateY(0);
}

.product-overlay h3 {
    font-size: 20px;
    margin: 0;
}

/* 联系我们 */
.contact-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

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

.contact-section .section-title::after {
    background: white;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.contact-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.contact-icon {
    font-size: 32px;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    flex-shrink: 0;
}

.contact-details h3 {
    font-size: 20px;
    margin-bottom: 10px;
}

.contact-details p {
    font-size: 16px;
    line-height: 1.6;
}

.contact-details a {
    color: white;
    text-decoration: none;
    transition: opacity 0.3s ease;
}

.contact-details a:hover {
    opacity: 0.8;
    text-decoration: underline;
}

.contact-image img {
    width: 100%;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

/* 底部 */
.footer {
    background: #2c3e50;
    color: white;
    padding: 30px 0;
    text-align: center;
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-company {
    font-size: 18px;
    font-weight: 500;
}

.footer-icp {
    font-size: 14px;
}

.footer-icp a {
    color: #ecf0f1;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-icp a:hover {
    color: #3498db;
    text-decoration: underline;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        gap: 15px;
        font-size: 14px;
    }

    .banner-container {
        height: 300px;
    }

    .banner-prev,
    .banner-next {
        padding: 10px 15px;
        font-size: 18px;
    }

    .section-title {
        font-size: 28px;
    }

    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .products-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 20px;
    }

    .product-item img {
        height: 250px;
    }

    section {
        padding: 50px 0;
    }
}

@media (max-width: 480px) {
    .logo {
        font-size: 20px;
    }

    .nav-menu {
        gap: 10px;
        font-size: 12px;
    }

    .banner-container {
        height: 250px;
    }

    .section-title {
        font-size: 24px;
    }

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