/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', system-ui, sans-serif;
}

body {
    line-height: 1.6;
    color: #333;
}

/* 导航栏样式 */
header {
    background: #f8f9fa;
    padding: 1rem 0;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.logo img {
    height: 40px;
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2rem;
}

nav ul {
    display: flex;
    gap: 2rem;
    list-style: none;
}

nav a {
    text-decoration: none;
    color: #2d3436;
    font-weight: 500;
}

/* 主要内容区块 */
main {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 2rem;
}

section {
    margin: 4rem 0;
}

h1, h2 {
    color: #2d3436;
    margin-bottom: 1.5rem;
}

/* 服务卡片 */
.service-card {
    background: #fff;
    border-radius: 8px;
    padding: 2rem;
    margin: 1rem 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

/* 页脚样式 */
footer {
    background: #2d3436;
    color: white;
    text-align: center;
    padding: 1.5rem;
    margin-top: 4rem;
}