/* 重置样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Arial', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f4f4f4;
}

/* 头部样式 */
header {
    background: #2c3e50;
    color: white;
    padding: 1rem 0;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

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

nav ul li {
    margin: 0 20px;
}

nav ul li a {
    color: white;
    text-decoration: none;
    font-weight: bold;
    padding: 5px 10px;
    border-radius: 3px;
    transition: background-color 0.3s;
}

nav ul li a:hover {
    background-color: #34495e;
}

/* 主内容区 */
main {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 20px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    padding: 2rem;
}

h1 {
    color: #2c3e50;
    margin-bottom: 1rem;
    border-bottom: 2px solid #3498db;
    padding-bottom: 0.5rem;
}

h2 {
    color: #34495e;
    margin: 1.5rem 0 1rem 0;
}

h3 {
    color: #7f8c8d;
    margin: 1rem 0;
}

/* 列表样式 */
ul {
    margin-left: 2rem;
    margin-bottom: 1rem;
}

li {
    margin-bottom: 0.5rem;
}

/* 特性区域 */
.features {
    background: #ecf0f1;
    padding: 1.5rem;
    border-radius: 5px;
    margin: 1.5rem 0;
}

.user-links {
    background: #d5dbdb;
    padding: 1rem;
    border-radius: 5px;
    margin: 1.5rem 0;
}

.user-links a {
    color: #2980b9;
    text-decoration: none;
}

.user-links a:hover {
    text-decoration: underline;
}

/* 关于页面样式 */
.about-content {
    background: #f8f9fa;
    padding: 1.5rem;
    border-radius: 5px;
    margin: 1.5rem 0;
}

.user-info {
    background: #e8f6f3;
    padding: 1.5rem;
    border-radius: 5px;
    margin: 1.5rem 0;
}

/* 链接样式 */
a {
    color: #3498db;
    text-decoration: none;
    transition: color 0.3s;
}

a:hover {
    color: #2980b9;
}

/* 页脚样式 */
footer {
    text-align: center;
    padding: 1rem;
    background: #2c3e50;
    color: white;
    margin-top: 2rem;
}