* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1.5rem 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

header h1 {
    font-size: 1.8rem;
    font-weight: 600;
}

nav {
    display: flex;
    gap: 2rem;
}

nav a {
    color: white;
    text-decoration: none;
    font-size: 1rem;
    transition: opacity 0.3s;
}

nav a:hover {
    opacity: 0.8;
}

/* Main Content */
main {
    min-height: calc(100vh - 200px);
    padding: 3rem 0;
}

.hero {
    background: white;
    padding: 4rem 0;
    text-align: center;
    margin-bottom: 2rem;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.hero h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: #667eea;
}

.hero p {
    font-size: 1.2rem;
    color: #666;
}

.content {
    padding: 2rem 0;
}

.card {
    background: white;
    padding: 2rem;
    margin-bottom: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.card h2,
.card h3 {
    color: #667eea;
    margin-bottom: 1rem;
}

.card p {
    color: #666;
    line-height: 1.8;
}

/* Footer */
footer {
    background: #2c3e50;
    color: white;
    padding: 2rem 0;
    margin-top: 3rem;
    text-align: center;
}

footer p {
    margin: 0.5rem 0;
}

footer .icp {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

footer .icp a {
    color: #ecf0f1;
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s;
}

footer .icp a:hover {
    color: #3498db;
}

footer .icp #icp-number {
    font-weight: 600;
    color: #3498db;
}

/* Responsive */
@media (max-width: 768px) {
    header .container {
        flex-direction: column;
        gap: 1rem;
    }

    nav {
        gap: 1rem;
    }

    .hero h2 {
        font-size: 2rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .card {
        padding: 1.5rem;
    }
}