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

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
}

header {
    background: #333;
    color: #fff;
    padding: 1rem;
}

nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
}

nav ul li {
    margin: 0 1rem;
}

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

.hero {
    background: url('background.jpg') no-repeat center center/cover;
    height: 500px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: #fff;
}

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

.btn {
    display: inline-block;
    background: #ff6600;
    color: #fff;
    padding: 0.75rem 1.5rem;
    text-decoration: none;
    border-radius: 5px;
    margin-top: 1rem;
}

section {
    padding: 2rem;
    text-align: center;
}

.services {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}

.service-item {
    background: #f4f4f4;
    padding: 1rem;
    border-radius: 5px;
}

.contact form {
    display: flex;
    flex-direction: column;
    max-width: 500px;
    margin: 0 auto;
}

.contact form input,
.contact form textarea {
    margin-bottom: 1rem;
    padding: 0.5rem;
}

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