/* 全局样式 */
* {
    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: #f8f8f8;
}

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

/* 头部导航 */
.header {
    background-color: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.logo a {
    text-decoration: none;
    color: #333;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.logo h1 {
    font-size: 28px;
    font-weight: bold;
    color: #c8161d;
}

.logo span {
    font-size: 14px;
    color: #666;
    margin-top: 5px;
}

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

.nav-menu li {
    margin-left: 30px;
}

.nav-menu a {
    text-decoration: none;
    color: #333;
    font-size: 16px;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-menu a:hover {
    color: #c8161d;
}

.language-switch {
    display: flex;
    gap: 10px;
}

.lang-btn {
    padding: 5px 15px;
    border: 1px solid #ddd;
    background-color: #fff;
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.3s;
}

.lang-btn.active {
    background-color: #c8161d;
    color: #fff;
    border-color: #c8161d;
}

/* 英雄区域 */
.hero {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    padding: 100px 0;
    text-align: center;
}

.hero-content h2 {
    font-size: 48px;
    font-weight: bold;
    margin-bottom: 20px;
    color: #333;
}

.hero-content p {
    font-size: 18px;
    color: #666;
    margin-bottom: 30px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    background-color: #c8161d;
    color: #fff;
    text-decoration: none;
    border-radius: 4px;
    font-size: 16px;
    font-weight: 500;
    transition: background-color 0.3s;
}

.btn:hover {
    background-color: #a81319;
}

/* 核心优势 */
.advantages {
    padding: 80px 0;
    background-color: #fff;
}

.advantages h3 {
    text-align: center;
    font-size: 32px;
    font-weight: bold;
    margin-bottom: 60px;
    color: #333;
}

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

.advantage-item {
    text-align: center;
    padding: 30px;
    background-color: #f8f8f8;
    border-radius: 8px;
    transition: transform 0.3s, box-shadow 0.3s;
}

.advantage-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.advantage-icon {
    margin-bottom: 20px;
}

.advantage-icon img {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border-radius: 50%;
}

.advantage-item h4 {
    font-size: 20px;
    font-weight: bold;
    margin-bottom: 15px;
    color: #333;
}

.advantage-item p {
    color: #666;
    font-size: 14px;
}

/* 产品分类 */
.product-categories {
    padding: 80px 0;
    background-color: #f8f8f8;
}

.product-categories h3 {
    text-align: center;
    font-size: 32px;
    font-weight: bold;
    margin-bottom: 60px;
    color: #333;
}

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

.category-item {
    position: relative;
    overflow: hidden;
    border-radius: 8px;
    text-decoration: none;
    color: #333;
    transition: transform 0.3s;
}

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

.category-item img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: transform 0.3s;
}

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

.category-item h4 {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.9);
    padding: 15px;
    margin: 0;
    text-align: center;
    font-size: 18px;
    font-weight: bold;
}

/* 精选产品 */
.featured-products {
    padding: 80px 0;
    background-color: #fff;
}

.featured-products h3 {
    text-align: center;
    font-size: 32px;
    font-weight: bold;
    margin-bottom: 60px;
    color: #333;
}

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

.product-item {
    background-color: #f8f8f8;
    border-radius: 8px;
    overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s;
}

.product-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.product-item img {
    width: 100%;
    height: 250px;
    object-fit: cover;
}

.product-item h4 {
    padding: 20px 20px 10px;
    font-size: 18px;
    font-weight: bold;
    color: #333;
}

.product-item p {
    padding: 0 20px 20px;
    color: #666;
    font-size: 14px;
}

/* 公司简介 */
.company-intro {
    padding: 80px 0;
    background-color: #f8f8f8;
}

.intro-content {
    display: flex;
    flex-wrap: wrap;
    gap: 40px;
    align-items: center;
}

.intro-text {
    flex: 1;
    min-width: 300px;
}

.intro-text h3 {
    font-size: 32px;
    font-weight: bold;
    margin-bottom: 20px;
    color: #333;
}

.intro-text p {
    font-size: 16px;
    color: #666;
    margin-bottom: 30px;
    line-height: 1.8;
}

.intro-image {
    flex: 1;
    min-width: 300px;
}

.intro-image img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    border-radius: 8px;
}

/* 页脚 */
.footer {
    background-color: #333;
    color: #fff;
    padding: 60px 0 30px;
}

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

.footer-info h4,
.footer-links h4,
.footer-social h4 {
    font-size: 18px;
    font-weight: bold;
    margin-bottom: 20px;
    color: #fff;
}

.footer-info p {
    color: #ccc;
    margin-bottom: 10px;
}

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

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

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

.footer-links a:hover {
    color: #c8161d;
}

.social-icons {
    display: flex;
    gap: 15px;
}

.social-icons a {
    color: #ccc;
    text-decoration: none;
    transition: color 0.3s;
}

.social-icons a:hover {
    color: #c8161d;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid #555;
    color: #ccc;
    font-size: 14px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 20px;
        padding: 15px 0;
    }

    .nav-menu {
        flex-wrap: wrap;
        justify-content: center;
    }

    .nav-menu li {
        margin: 0 15px;
    }

    .hero-content h2 {
        font-size: 36px;
    }

    .hero-content p {
        font-size: 16px;
    }

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

    .intro-content {
        flex-direction: column;
    }

    .intro-text,
    .intro-image {
        flex: none;
        width: 100%;
    }
}

/* 产品页面样式 */
.products-page {
    padding: 60px 0;
    background-color: #f8f8f8;
}

.products-page h2 {
    text-align: center;
    font-size: 32px;
    font-weight: bold;
    margin-bottom: 40px;
    color: #333;
}

.product-category {
    margin-bottom: 60px;
}

.product-category h3 {
    font-size: 24px;
    font-weight: bold;
    margin-bottom: 30px;
    color: #333;
    border-bottom: 2px solid #c8161d;
    padding-bottom: 10px;
}

/* 关于页面样式 */
.about-page {
    padding: 60px 0;
    background-color: #f8f8f8;
}

.about-page h2 {
    text-align: center;
    font-size: 32px;
    font-weight: bold;
    margin-bottom: 40px;
    color: #333;
}

.about-content {
    background-color: #fff;
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.about-content h3 {
    font-size: 24px;
    font-weight: bold;
    margin-bottom: 20px;
    color: #333;
}

.about-content p {
    margin-bottom: 20px;
    line-height: 1.8;
    color: #666;
}

/* 联系页面样式 */
.contact-page {
    padding: 60px 0;
    background-color: #f8f8f8;
}

.contact-page h2 {
    text-align: center;
    font-size: 32px;
    font-weight: bold;
    margin-bottom: 40px;
    color: #333;
}

.contact-content {
    display: flex;
    flex-wrap: wrap;
    gap: 40px;
}

.contact-info {
    flex: 1;
    min-width: 300px;
    background-color: #fff;
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.contact-form {
    flex: 1;
    min-width: 300px;
    background-color: #fff;
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.contact-form form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    margin-bottom: 5px;
    font-weight: 500;
    color: #333;
}

.form-group input,
.form-group textarea {
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
}

.form-group textarea {
    resize: vertical;
    min-height: 150px;
}

.form-group button {
    padding: 12px;
    background-color: #c8161d;
    color: #fff;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.3s;
}

.form-group button:hover {
    background-color: #a81319;
}

/* 表单提交成功提示 */
.success-message {
    background-color: #d4edda;
    color: #155724;
    padding: 15px;
    border-radius: 4px;
    margin-top: 20px;
    display: none;
}

.success-message.show {
    display: block;
}