body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: #f4f4f9;
    color: #333;
    margin: 0;
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}
.container {
    width: 100%;
    max-width: 680px;
    background: #fff;
    padding: 20px 30px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}
header h1 {
    text-align: center;
    color: #2c3e50;
    margin-bottom: 20px;
}
.product-image {
    width: 100%;
    border-radius: 8px;
    margin-bottom: 20px;
}
.product-info h2 {
    margin-top: 0;
}
.price {
    font-size: 1.5em;
    color: #e74c3c;
    font-weight: bold;
    margin: 20px 0;
}
.purchase-button {
    display: block;
    width: 100%;
    padding: 15px;
    font-size: 1.2em;
    font-weight: bold;
    color: #fff;
    background-color: #07c160; /* WeChat Green */
    border: none;
    border-radius: 5px;
    cursor: pointer;
    text-align: center;
    transition: background-color 0.3s;
}
.purchase-button:hover {
    background-color: #06ad56;
}
footer {
    text-align: center;
    margin-top: 30px;
    font-size: 0.9em;
    color: #7f8c8d;
}
footer a {
    color: #3498db;
    text-decoration: none;
}
.text-content {
     padding: 20px;
}
.text-content h1 {
    border-bottom: 2px solid #eee;
    padding-bottom: 10px;
}