* {
    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 0;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2rem;
}

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

nav ul li {
    margin: 0 1rem;
}

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

.hero {
    background: url('/h5/chatgpt/css/img/pinchuan.jpg') no-repeat center center/cover;
    color: #fff;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.btn {
    background: #ff7a59;
    color: #fff;
    padding: 1rem 2rem;
    text-decoration: none;
    border-radius: 5px;
}

.section {
    padding: 4rem 2rem;
}

.service-cards {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
}

.service-card {
    background: #f4f4f4;
    padding: 2rem;
    margin: 1rem;
    border-radius: 5px;
    flex: 1 1 30%;
    text-align: center;
}

.about-section {
    background: #f0f0f0;
}

.contact-section form {
    display: flex;
    flex-direction: column;
    max-width: 600px;
    margin: auto;
}

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

form button {
    background: #ff7a59;
    color: #fff;
    padding: 1rem;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

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