/* 全局重置 - 百度爬虫友好，无样式冲突 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 基础样式 - 加载速度快 */
body {
    font-family: "Microsoft YaHei", sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

/* 头部样式 */
.header {
    background: #2c3e50;
    padding: 15px 0;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 99;
}

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

.logo {
    color: #fff;
    font-size: 24px;
    font-weight: bold;
}

.nav {
    display: flex;
    gap: 30px;
}

.nav-link {
    color: #fff;
    text-decoration: none;
    font-size: 16px;
    transition: color 0.3s;
}

.nav-link:hover {
    color: #3498db;
}

/* Banner样式 */
.banner {
    margin-top: 70px;
    background: linear-gradient(135deg, #3498db, #2980b9);
    color: #fff;
    text-align: center;
    padding: 100px 0;
}

.banner-title {
    font-size: 42px;
    margin-bottom: 20px;
}

.banner-desc {
    font-size: 18px;
    margin-bottom: 30px;
}

.banner-btn {
    padding: 12px 30px;
    background: #fff;
    color: #2980b9;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    cursor: pointer;
    transition: 0.3s;
}

.banner-btn:hover {
    background: #f5f5f5;
}

/* 通用板块标题 */
.section-title {
    text-align: center;
    font-size: 32px;
    color: #2c3e50;
    margin-bottom: 40px;
    position: relative;
}

.section-title::after {
    content: "";
    width: 60px;
    height: 3px;
    background: #3498db;
    display: block;
    margin: 10px auto 0;
}

/* 服务板块 */
.service {
    padding: 80px 0;
    background: #f9f9f9;
}

.service-list {
    display: flex;
    flex-wrap: wrap;
    gap: 30px;
    justify-content: center;
}

.service-item {
    width: 300px;
    background: #fff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    text-align: center;
}

.service-item h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: #2c3e50;
}

/* 关于我们 */
.about {
    padding: 80px 0;
    text-align: center;
}

.about-desc {
    max-width: 800px;
    margin: 0 auto;
    font-size: 16px;
    color: #666;
}

/* 联系我们 */
.contact {
    padding: 80px 0;
    background: #f9f9f9;
    text-align: center;
}

.contact-desc {
    font-size: 16px;
    color: #333;
}

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

/* 响应式 - 百度移动端优先 */
@media (max-width: 768px) {
    .banner-title {
        font-size: 28px;
    }
    .nav {
        gap: 15px;
    }
    .section-title {
        font-size: 26px;
    }
}