* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Microsoft YaHei", sans-serif;
}

body {
    background-color: #f5f5f5;
    color: #333;
}

header {
    background-color: #2c3e50;
    padding: 15px 0;
}

nav {
    max-width: 1000px;
    margin: 0 auto;
    text-align: center;
}

nav a {
    color: #fff;
    text-decoration: none;
    margin: 0 10px;
    font-size: 16px;
    padding: 6px 10px;
    border-radius: 4px;
}

nav a:hover,
nav a.active {
    background-color: #3498db;
}

.container {
    max-width: 1000px;
    margin: 40px auto;
    padding: 0 20px;
}

.card, .hero-card {
    background-color: #fff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    text-align: center;
}

.hero-card {
    padding: 60px 20px;
}

h1 {
    font-size: 36px;
    margin-bottom: 20px;
    color: #2c3e50;
}

h2 {
    font-size: 28px;
    margin-bottom: 20px;
    color: #2c3e50;
}

p {
    font-size: 18px;
    line-height: 1.8;
    margin-bottom: 10px;
}

.list {
    list-style: none;
    font-size: 18px;
    line-height: 2;
}

footer {
    text-align: center;
    padding: 20px;
    color: #777;
    margin-top: 40px;
}