/* 重置样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

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

/* 头部导航 */
.header {
    background: linear-gradient(135deg, #2c3e50 0%, #3498db 100%);
    color: #fff;
    padding: 15px 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

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

.logo h1 {
    font-size: 24px;
    font-weight: 700;
}

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

.nav-link {
    color: #fff;
    text-decoration: none;
    font-size: 16px;
    padding: 10px 20px;
    border-radius: 25px;
    transition: all 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
    background-color: rgba(255, 255, 255, 0.2);
}

/* 主内容区域 */
.main {
    margin-top: 80px;
    min-height: calc(100vh - 160px);
}

.tab-content {
    display: none;
    padding: 60px 0;
    animation: fadeIn 0.5s ease;
}

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

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

h2 {
    font-size: 36px;
    color: #2c3e50;
    margin-bottom: 20px;
    text-align: center;
}

h3 {
    font-size: 28px;
    color: #2c3e50;
    margin-bottom: 30px;
    text-align: center;
}

.section-desc {
    text-align: center;
    color: #666;
    margin-bottom: 40px;
    font-size: 18px;
}

/* 占位图片样式 */
.placeholder-image {
    background: linear-gradient(135deg, #e0e0e0 0%, #bdbdbd 100%);
    color: #666;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    border-radius: 10px;
    min-height: 200px;
}

/* 公司简介页面 */
.hero {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    margin-bottom: 80px;
}

.hero-image img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.hero-text h2 {
    text-align: left;
    margin-bottom: 20px;
}

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

.hero-text strong {
    color: #2c3e50;
}

/* 产品展示区域 */
.products-showcase {
    margin-top: 60px;
    text-align: center;
}

.showcase-image {
    background: #fff;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 5px 30px rgba(0, 0, 0, 0.05);
}

.showcase-image img {
    max-width: 100%;
    height: auto;
    border-radius: 10px;
}

.features {
    background: #fff;
    padding: 60px;
    border-radius: 20px;
    box-shadow: 0 5px 30px rgba(0, 0, 0, 0.05);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.feature-item {
    text-align: center;
    padding: 30px;
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.feature-item h4 {
    font-size: 20px;
    color: #2c3e50;
    margin-bottom: 10px;
}

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

/* 产品介绍页面 */
.product-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.product-card {
    background: #fff;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.product-image .placeholder-image {
    height: 200px;
    border-radius: 10px;
}

.product-info {
    padding: 15px 10px;
}

.product-info h3 {
    font-size: 20px;
    margin-bottom: 10px;
    text-align: left;
}

.product-info p {
    color: #666;
    margin-bottom: 20px;
}

.btn {
    display: inline-block;
    padding: 10px 25px;
    background: linear-gradient(135deg, #3498db 0%, #2c3e50 100%);
    color: #fff;
    text-decoration: none;
    border-radius: 25px;
    font-size: 14px;
    transition: all 0.3s ease;
}

.btn:hover {
    transform: scale(1.05);
    box-shadow: 0 5px 15px rgba(52, 152, 219, 0.4);
}

/* 联系我们页面 */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    background: #fff;
    padding: 60px;
    border-radius: 20px;
    box-shadow: 0 5px 30px rgba(0, 0, 0, 0.05);
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    margin-bottom: 30px;
}

.contact-icon {
    font-size: 30px;
    background: linear-gradient(135deg, #3498db 0%, #2c3e50 100%);
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-text h4 {
    font-size: 18px;
    color: #2c3e50;
    margin-bottom: 5px;
}

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

.map-placeholder {
    height: 100%;
    min-height: 300px;
}

/* 联系我们图片 */
.contact-image {
    text-align: center;
}

.contact-image img {
    max-width: 100%;
    height: auto;
    border-radius: 10px;
    box-shadow: 0 5px 30px rgba(0, 0, 0, 0.1);
}

/* 产品图片样式 */
.product-image {
    padding: 40px 40px 0 40px;
    position: relative;
}

.product-image img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 10px;
    cursor: pointer;
    transition: transform 0.3s ease;
}

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

/* 图片点击大图预览 */
.image-preview-backdrop {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: 1400;
    cursor: pointer;
}

.image-preview-container {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 1500;
}

.image-preview-overlay {
    max-width: 80vw;
    max-height: 80vh;
    border-radius: 15px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
    object-fit: contain;
}

.image-preview-close {
    position: absolute;
    top: -15px;
    right: -15px;
    width: 40px;
    height: 40px;
    background: #fff;
    border: none;
    border-radius: 50%;
    font-size: 24px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    transition: transform 0.2s ease;
}

.image-preview-close:hover {
    transform: scale(1.1);
}

/* 弹窗样式 */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    overflow: auto;
}

.modal-content {
    background-color: #fff;
    margin: 5% auto;
    padding: 30px;
    border-radius: 15px;
    max-width: 900px;
    position: relative;
    animation: modalFadeIn 0.3s ease;
}

@keyframes modalFadeIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.modal-content h3 {
    margin-bottom: 20px;
    color: #2c3e50;
}

/* 图片列表样式 */
.gallery-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
    max-height: 70vh;
    overflow-y: auto;
}

.gallery-list img {
    max-width: 100%;
    height: auto;
    border-radius: 10px;
}

.modal-close {
    position: absolute;
    right: 20px;
    top: 15px;
    font-size: 30px;
    font-weight: bold;
    color: #999;
    cursor: pointer;
    transition: color 0.3s;
}

.modal-close:hover {
    color: #333;
}

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

/* 响应式设计 */
@media (max-width: 992px) {
    .hero {
        grid-template-columns: 1fr;
    }

    .feature-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .product-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .contact-wrapper {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .header .container {
        flex-direction: column;
        gap: 15px;
    }

    .nav-list {
        gap: 10px;
    }

    .nav-link {
        padding: 8px 15px;
        font-size: 14px;
    }

    .main {
        margin-top: 120px;
    }

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

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

    h2 {
        font-size: 28px;
    }

    .features,
    .contact-wrapper {
        padding: 30px;
    }
}