/* 重置默认样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

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

/* 头部导航 */
header {
    background-color: #fff;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
}

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

.hamburger {
    display: none;
    background: none;
    border: none;
    font-size: 1.8rem;
    cursor: pointer;
    color: #2c3e50;
}

.logo h2 {
    color: #2c3e50;
    font-size: 1.8rem;
}

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

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

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

nav ul li a:hover,
nav ul li a.active {
    color: #3498db;
}

nav ul li a.active::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 100%;
    height: 2px;
    background: #3498db;
}

/* 横幅区域 */
.banner {
    background: linear-gradient(135deg, #3498db, #2c3e50);
    color: white;
    text-align: center;
    padding: 150px 20px 100px;
    margin-top: 70px;
}

.banner h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(86, 86, 86, 0.3);
}

.banner p {
    font-size: 1.5rem;
    margin-bottom: 30px;
    opacity: 0.9;
}

.btn {
    display: inline-block;
    background: #e74c3c;
    color: white;
    padding: 12px 30px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: bold;
    transition: all 0.3s;
    border: 2px solid #e74c3c;
}

.btn:hover {
    background: transparent;
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

/* 内容区域通用样式 */
section {
    padding: 80px 0;
}

section h1 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 50px;
    color: #f04628;
}

section h2 {
    font-size: 2rem;
    margin-bottom: 30px;
    color: #2c3e50;
    text-align: center;
}

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

.about .container > p {
    max-width: 800px;
    margin: 0 auto 40px;
    text-align: center;
    font-size: 1.2rem;
    line-height: 1.8;
}

.features {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    margin-top: 50px;
}

.feature {
    flex: 1;
    min-width: 250px;
    margin: 15px;
    padding: 30px;
    background: white;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    transition: transform 0.3s;
}

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

.feature h3 {
    color: #3498db;
    margin-bottom: 15px;
    font-size: 1.5rem;
}

/* 服务 */
.services {
    background-color: white;
}

.service-list {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
}

.service-item {
    flex: 1;
    min-width: 250px;
    margin: 15px;
    padding: 30px;
    background: #f8f9fa;
    border-radius: 10px;
    text-align: center;
    transition: all 0.3s;
}

.service-item:hover {
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
    transform: translateY(-5px);
}

.service-item h3 {
    color: #2c3e50;
    margin-bottom: 15px;
    font-size: 1.5rem;
}

/* 联系我们 */
.contact {
    background-color: #2c3e50;
    color: white;
}

.contact h2 {
    color: white;
}

.contact p {
    font-size: 1.5rem;
    margin-bottom: 30px;
    opacity: 0.9;
    text-align: center;
}

.contact-info {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    margin-bottom: 0px;
}

.contact-item {
    flex: 1;
    min-width: 200px;
    text-align: center;
    margin: 15px;
}

.contact-item h3 {
    color: #3498db;
    margin-bottom: 10px;
}

.contact-form {
    max-width: 600px;
    margin: 0 auto;
    display: grid;
    gap: 20px;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 12px;
    border-radius: 5px;
    border: none;
    font-size: 1rem;
}

/* 关于页面 */
.about-page {
    padding: 100px 0;
    background-color: #f8f9fa;
}

.about-intro {
    max-width: 900px;
    margin: 0 auto;
}

.about-intro p {
    font-size: 1.2rem;
    line-height: 1.8;
    margin-bottom: 40px;
    text-align: center;
}

.about-history {
    margin-bottom: 50px;
}

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

.timeline-item {
    background: white;
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}

.timeline-item h3 {
    color: #3498db;
    margin-bottom: 10px;
}

.team-section {
    margin: 50px 0;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr); /* 两列，每列均分空间 */
    gap: 30px;
    margin-top: 30px;
    justify-items: center; /* 让网格项水平居中 */
    align-items: center;   /* 让网格项垂直居中（如果需要）*/
    justify-content: center; /* 将整个网格内容居中对齐 */
    width: 100%; /* 确保网格占满容器宽度以实现居中 */
    max-width: 600px; /* 限制最大宽度，使在大屏幕上也能居中显示 */
    margin: 30px auto; /* 使用margin auto替代上面的margin-top，更好地控制居中 */
}

.team-member {
    background: white;
    padding: 30px 20px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}

.member-img {
    width: 120px;
    height: 120px;
    background: #eee;
    border-radius: 50%;
    margin: 0 auto 20px;
}

.team-member h3 {
    color: #2c3e50;
    margin-bottom: 5px;
}

.values-section {
    margin-top: 50px;
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 25px;
    margin-top: 30px;
}

.value-item {
    background: white;
    padding: 30px 20px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}

.value-item h3 {
    color: #3498db;
    margin-bottom: 15px;
}

/* 服务页面 */
.services-page {
    padding: 100px 0;
    background-color: #fff;
}

.services-intro {
    max-width: 800px;
    margin: 0 auto 50px;
    text-align: center;
}

.services-intro p {
    font-size: 1.2rem;
    line-height: 1.8;
}

.service-category {
    margin: 50px 0;
}

.service-category h2 {
    text-align: left;
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 2px solid #3498db;
}

.service-items {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.service-item-full {
    background: #f8f9fa;
    padding: 30px;
    border-radius: 10px;
}

.service-item-full h3 {
    color: #2c3e50;
    margin-bottom: 15px;
}

.service-item-full ul {
    margin: 20px 0;
    padding-left: 20px;
}

.service-item-full ul li {
    margin: 10px 0;
}

/* 产品页面 */
.products-page {
    padding: 100px 0;
    background-color: #f8f9fa;
}

.products-intro {
    max-width: 800px;
    margin: 0 auto 50px;
    text-align: center;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(450px, 1fr)); /* 将最小宽度从350px增加到450px */
    gap: 30px;
}

.product-card {
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}

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

.product-image {
    height: 200px;
    background: linear-gradient(135deg, #3498db, #2c3e50);
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgb(255, 255, 255);
    font-size: 3.5rem;
}

.product-info {
    padding: 25px;
}

.product-info h3 {
    color: #2c3e50;
    margin-bottom: 15px;
}

.product-info ul {
    margin: 20px 0;
    padding-left: 20px;
}

.product-info ul li {
    margin: 8px 0;
    color: #555;
}

/* 联系页面 */
.contact-page {
    padding: 100px 0;
    background-color: #fff;
}

.contact-content {
    display: flex;
    flex-wrap: wrap;
    gap: 50px;
    margin-top: 30px;
}

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

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

.contact-methods {
    margin: 30px 0;
}

.contact-method {
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid #eee;
}

.contact-method h3 {
    color: #3498db;
    margin-bottom: 10px;
    text-align: left;
}

.map-section {
    margin-top: 40px;
}

.map-placeholder {
    background: #f8f9fa;
    padding: 40px;
    text-align: center;
    border-radius: 10px;
    color: #777;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
    color: #2c3e50;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 1rem;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.2);
}

/* 底部 */
footer {
    background-color: #1a252f;
    color: #aaa;
    padding: 40px 0 20px;
    text-align: center;
}

footer .container {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.beian-info {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    margin-top: 10px;
    gap: 6px;
}

.beian-icon {
    width: 12px;
    height: 12px;
    vertical-align: middle;
}

.beian-info a {
    color: #888;
    font-size: 12px;
    text-decoration: none;
}

.beian-info a:hover {
    color: #aaa;
}

.social-links {
    margin-top: 20px;
}

.social-links a {
    color: #aaa;
    margin: 0 10px;
    text-decoration: none;
}

.social-links a:hover {
    color: #3498db;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hamburger {
        display: block;
        order: 2;
    }
    
    header .container {
        flex-wrap: wrap;
        position: relative;
    }
    
    nav {
        width: 100%;
        order: 3;
    }
    
    nav ul {
        display: none;
        flex-direction: column;
        width: 100%;
        background: #fff;
        box-shadow: 0 10px 10px rgba(0,0,0,0.1);
        position: absolute;
        top: 100%;
        left: 0;
    }
    
    nav ul.active {
        display: flex;
    }
    
    nav ul li {
        margin: 0;
        text-align: center;
    }
    
    nav ul li a {
        display: block;
        padding: 15px;
        border-bottom: 1px solid #eee;
    }
    
    .banner {
        padding: 120px 20px 80px;
    }
    
    .banner h1 {
        font-size: 2rem;
    }
    
    .banner p {
        font-size: 1.2rem;
    }
    
    section h1 {
        font-size: 2rem;
    }
    
    .contact-content {
        flex-direction: column;
    }
    
    .contact-info {
        flex-direction: column;
    }
    
    .product-grid {
        grid-template-columns: 1fr;
    }
}