* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Microsoft YaHei", sans-serif;
}
body {
    color: #333;
    line-height: 1.6;
}
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}
/* 头部样式 */
header {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    padding: 15px 0;
}
.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}
.logo h1 {
    font-size: 24px;
    color: #2c3e50;
}
.logo span {
    font-size: 14px;
    color: #666;
}
nav ul {
    display: flex;
    list-style: none;
    gap: 30px;
}
nav a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s;
}
nav a:hover {
    color: #3498db;
}
/* 在线联系按钮（固定位置） */
.contact-btn {
    position: fixed;
    right: 30px;
    bottom: 30px;
    width: 60px;
    height: 60px;
    background: #3498db;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 24px;
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.4);
    cursor: pointer;
    z-index: 999;
    transition: transform 0.3s;
}
.contact-btn:hover {
    transform: scale(1.1);
}
/* 英雄区样式 */
.hero {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    padding: 80px 0;
    text-align: center;
}
.hero h2 {
    font-size: 42px;
    margin-bottom: 20px;
    color: #2c3e50;
}
.hero p {
    font-size: 18px;
    max-width: 800px;
    margin: 0 auto 30px;
    color: #555;
}
.hero .btn {
    display: inline-block;
    padding: 12px 30px;
    background: #3498db;
    color: white;
    text-decoration: none;
    border-radius: 5px;
    font-weight: 500;
    transition: background 0.3s;
}
.hero .btn:hover {
    background: #2980b9;
}
/* 业务板块 */
.services {
    padding: 80px 0;
}
.section-title {
    text-align: center;
    margin-bottom: 60px;
}
.section-title h2 {
    font-size: 32px;
    color: #2c3e50;
    margin-bottom: 10px;
}
.section-title p {
    color: #666;
    max-width: 700px;
    margin: 0 auto;
}
.service-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}
.service-card {
    background: white;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}
.service-card h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: #2c3e50;
}
.service-card p {
    color: #666;
}
/* 案例展示 */
.cases {
    background: #f9f9f9;
    padding: 80px 0;
}
.case-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}
.case-item {
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}
.case-img {
    height: 200px;
    background: #eee;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #999;
}
.case-info {
    padding: 20px;
}
.case-info h3 {
    font-size: 18px;
    margin-bottom: 10px;
}
.case-info p {
    font-size: 14px;
    color: #666;
}
/* 页脚样式 */
footer {
    background: #2c3e50;
    color: white;
    padding: 60px 0 20px;
}
.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}
.footer-col h3 {
    font-size: 18px;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}
.footer-col h3::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 40px;
    height: 2px;
    background: #3498db;
}
.footer-col p, .footer-col li {
    color: #ddd;
    margin-bottom: 10px;
}
.footer-col ul {
    list-style: none;
}
.footer-col a {
    color: #ddd;
    text-decoration: none;
    transition: color 0.3s;
}
.footer-col a:hover {
    color: #3498db;
}
.copyright {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #444;
    font-size: 14px;
    color: #aaa;
}
.beian-info {
    margin-top: 10px;
    font-size: 13px;
}
/* 响应式调整 */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 15px;
    }
    nav ul {
        gap: 15px;
    }
    .hero h2 {
        font-size: 32px;
    }
}