/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

.container {
    width: 80%;
    margin: auto;
    overflow: hidden;
    padding: 2rem 0;
}

.btn {
    display: inline-block;
    background: #333;
    color: #fff;
    padding: 0.8rem 1.5rem;
    text-decoration: none;
    border: none;
    cursor: pointer;
}

.btn:hover {
    background: #555;
}

/* 导航栏 */
header {
    background: #333;
    color: #fff;
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

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

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

header nav ul li {
    margin-left: 1.5rem;
}

header nav ul li a {
    color: #fff;
    text-decoration: none;
}

header nav ul li a:hover {
    color: #ccc;
}

/* 首页内容 */
.hero {
    background: url('hero-bg.png') no-repeat center center/cover;
    height: 70vh;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: #fff;
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.hero-content p {
    font-size: 1.3rem;
    margin-bottom: 2rem;
}

/* 关于我们 */
.about {
    background: #f4f4f4;
}

/* 服务项目 */
.services {
    background: #fff;
}

.service-card {
    background: #f4f4f4;
    padding: 1.5rem;
    margin-bottom: 1rem;
    border-radius: 5px;
}

/* 联系我们 */
.contact {
    background: #f4f4f4;
}

.contact form {
    display: flex;
    flex-direction: column;
}

.contact form input,
.contact form textarea {
    margin-bottom: 1rem;
    padding: 0.5rem;
    border: 1px solid #ccc;
    border-radius: 5px;
}

/* 页脚 */
footer {
    background: #333;
    color: #fff;
    text-align: center;
    padding: 1rem 0;
}