/* 全局样式 */
:root {
    --primary-color: #0066cc;
    --secondary-color: #004d99;
    --text-color: #333;
    --light-bg: #f5f5f5;
    --white: #ffffff;
    --border-color: #e0e0e0;
    --success-color: #28a745;
}

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

body {
    font-family: 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
}

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

/* 导航栏样式 */
.navbar {
    background-color: var(--white);
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    font-size: 24px;
    font-weight: bold;
    color: var(--primary-color);
}

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

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

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: var(--primary-color);
}

/* 英雄区域样式 */
.hero {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    padding: 120px 0 80px;
    text-align: center;
}

.hero h1 {
    font-size: 2.5em;
    margin-bottom: 20px;
}

.hero p {
    font-size: 1.2em;
    margin-bottom: 30px;
}

.cta-button {
    display: inline-block;
    padding: 12px 30px;
    background-color: var(--white);
    color: var(--primary-color);
    text-decoration: none;
    border-radius: 5px;
    font-weight: bold;
    transition: transform 0.3s;
}

.cta-button:hover {
    transform: translateY(-2px);
}

/* 服务区域样式 */
.services {
    padding: 80px 0;
    background-color: var(--light-bg);
}

.services h2 {
    text-align: center;
    margin-bottom: 50px;
}

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

.service-card {
    background: var(--white);
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    transition: transform 0.3s;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.service-card:hover {
    transform: translateY(-5px);
}

.service-card img {
    width: 60px;
    height: 60px;
    margin-bottom: 20px;
}

.service-card h3 {
    margin-bottom: 15px;
    color: var(--primary-color);
}

/* 关于我们区域样式 */
.about {
    padding: 80px 0;
    background-color: var(--white);
}

.about h2 {
    text-align: center;
    margin-bottom: 50px;
}

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

.about-text {
    flex: 2;
    min-width: 300px;
}

.about-text h3 {
    color: var(--primary-color);
    margin-bottom: 15px;
    margin-top: 25px;
}

.about-text h3:first-child {
    margin-top: 0;
}

.about-text p {
    margin-bottom: 15px;
    line-height: 1.8;
}

.about-stats {
    flex: 1;
    min-width: 250px;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.stat-item {
    background-color: var(--light-bg);
    padding: 25px 15px;
    text-align: center;
    border-radius: 10px;
    box-shadow: 0 3px 10px rgba(0,0,0,0.1);
}

.stat-item h4 {
    font-size: 2em;
    color: var(--primary-color);
    margin-bottom: 10px;
}

/* 产品中心区域样式 */
.products {
    padding: 80px 0;
    background-color: var(--white);
    text-align: center;
}

.products h2 {
    text-align: center;
    margin-bottom: 30px;
    font-size: 2.2em;
}

.business-intro {
    max-width: 900px;
    margin: 0 auto 50px;
    text-align: center;
}

.business-intro p {
    font-size: 1.1em;
    line-height: 1.6;
}

.business-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.business-card {
    background-color: var(--white);
    padding: 20px;
    text-align: center;
    transition: transform 0.3s;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.business-card:hover {
    transform: translateY(-5px);
}

.business-icon {
    width: 150px;
    height: 150px;
    background-color: var(--primary-color);
    border-radius: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.business-icon img {
    width: 60px;
    height: 60px;
    filter: brightness(0) invert(1);
}

.business-card h3 {
    margin-bottom: 15px;
    font-size: 1.2em;
    font-weight: bold;
}

.business-card p {
    font-size: 0.95em;
    line-height: 1.5;
}

/* 成功案例区域样式 */
.cases {
    padding: 80px 0;
    background-color: var(--light-bg);
}

.cases h2 {
    text-align: center;
    margin-bottom: 50px;
}

.case-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.case-card {
    background-color: var(--white);
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}

.case-card:hover {
    transform: translateY(-5px);
}

.case-card h3 {
    color: var(--primary-color);
    margin-bottom: 15px;
    font-size: 1.2em;
}

.case-industry {
    font-weight: bold;
    margin-bottom: 10px;
    color: #666;
}

.case-challenge, .case-solution {
    margin-bottom: 10px;
    line-height: 1.6;
}

.case-result {
    color: var(--success-color);
    font-weight: bold;
}

/* 优势区域样式 */
.advantages {
    padding: 80px 0;
}

.advantages h2 {
    text-align: center;
    margin-bottom: 50px;
}

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

.advantage-item {
    text-align: center;
    padding: 20px;
}

.advantage-item img {
    width: 50px;
    height: 50px;
    margin-bottom: 15px;
}

/* 联系我们区域样式 */
.contact {
    padding: 80px 0;
    background-color: var(--light-bg);
}

.contact h2 {
    text-align: center;
    margin-bottom: 40px;
}

.contact-info {
    max-width: 600px;
    margin: 0 auto;
    background: var(--white);
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.contact-info p {
    margin-bottom: 15px;
}

/* 页脚样式 */
footer {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 20px 0;
    text-align: center;
}

footer a {
    color: var(--white);
    text-decoration: none;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .hero {
        padding: 100px 0 60px;
    }
    
    .hero h1 {
        font-size: 2em;
    }
    
    .service-grid,
    .advantage-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-info {
        margin: 0 20px;
    }
    
    .about-content {
        flex-direction: column;
    }
    
    .about-stats {
        margin-top: 30px;
    }
    
    .product-grid,
    .case-grid {
        grid-template-columns: 1fr;
    }
    
    .business-grid {
        grid-template-columns: 1fr;
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    .business-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}