/* 基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: "Microsoft YaHei", "微软雅黑", sans-serif;
    background-color: #f9f9f9;
    color: #333;
    line-height: 1.6;
}

.container {
    width: 80%;
    max-width: 1000px;
    margin: 0 auto;
    padding: 20px;
    background-color: #fff;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
    margin-top: 20px;
    margin-bottom: 20px;
}

/* 产品名称 */
header h1 {
    text-align: center;
    color: #2c3e50;
    font-size: 28px;
    margin-bottom: 10px;
}

/* 用户按钮导航 */
.user-nav {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin: 20px 0;
    flex-wrap: wrap;
}

.user-nav a {
    text-decoration: none;
    padding: 10px 20px;
    background-color: #3498db;
    color: white;
    border-radius: 5px;
    transition: background-color 0.3s ease;
    font-size: 14px;
    white-space: nowrap;
}

.user-nav a:hover {
    background-color: #2980b9;
}

/* 购买区域 */
.buy-section {
    margin: 20px 0;
    padding: 15px;
    background-color: #ecf0f1;
    border-radius: 5px;
    text-align: center;
    border: 1px solid #bdc3c7;
}

.buy-section h2 {
    color: #2c3e50;
    margin-bottom: 10px;
}

.buy-section button {
    margin: 10px;
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
    border: none;
    border-radius: 5px;
    background-color: #2ecc71;
    color: white;
    transition: background-color 0.3s ease;
}

.buy-section button:hover {
    background-color: #27ae60;
}

/* 产品介绍 */
.product-intro {
    margin: 20px 0;
    padding: 15px;
    background-color: #fbfbfb;
    border-left: 5px solid #3498db;
    border-radius: 5px;
    line-height: 1.8;
}

.product-intro h2 {
    color: #2c3e50;
    margin-bottom: 10px;
}

.product-intro p {
    text-indent: 2em;
    margin-bottom: 10px;
}

/* 联系信息 */
.contact-info {
    margin-top: 30px;
    padding: 15px;
    background-color: #f1f1f1;
    border-top: 1px solid #ccc;
    text-align: center;
    font-size: 14px;
    color: #555;
    border-radius: 0 0 8px 8px;
}

.contact-info p {
    margin: 5px 0;
}

/* 备案链接样式 */
.beian-link {
    color: #555;
    text-decoration: none;
    font-weight: normal;
}

.beian-link:hover {
    text-decoration: underline;
    color: #3498db;
}

/* 响应式适配 */
@media (max-width: 768px) {
    .container {
        width: 95%;
        padding: 15px;
    }
    .user-nav {
        gap: 10px;
    }
    .user-nav a {
        padding: 8px 15px;
        font-size: 13px;
    }
    .buy-section button {
        width: 100%;
        max-width: 200px;
        margin: 5px auto;
    }
}