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

body {
    font-family: "LXGW WenKai", -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    background: white;
    border-radius: 15px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    overflow: hidden;
}

header {
    background: linear-gradient(135deg, #0066cc 0%, #0052a3 100%);
    color: white;
    padding: 40px;
    text-align: center;
}

header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
}

.version {
    font-size: 1.1em;
    opacity: 0.9;
}

.version-value {
    font-weight: bold;
    background: rgba(255, 255, 255, 0.2);
    padding: 2px 10px;
    border-radius: 4px;
}

main {
    padding: 40px;
}

section {
    margin-bottom: 40px;
}

section h2 {
    color: #0066cc;
    font-size: 2em;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 3px solid #e0e0e0;
}

.intro p {
    font-size: 1.1em;
    margin-bottom: 15px;
}

.warning {
    background: #fff3cd;
    border-left: 4px solid #ffc107;
    padding: 15px;
    border-radius: 4px;
    margin-top: 20px;
}

.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.card {
    background: #f8f9fa;
    border-radius: 10px;
    padding: 30px;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
    border: 2px solid #e0e0e0;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 102, 204, 0.2);
    border-color: #0066cc;
}

.card h3 {
    color: #0066cc;
    font-size: 1.5em;
    margin-bottom: 10px;
}

.card p {
    color: #666;
    margin-bottom: 20px;
    min-height: 48px;
}

.button {
    display: inline-block;
    background: #0066cc;
    color: white;
    padding: 12px 30px;
    border-radius: 25px;
    text-decoration: none;
    font-weight: bold;
    transition: background 0.3s, transform 0.2s;
    box-shadow: 0 4px 15px rgba(0, 102, 204, 0.3);
}

.button:hover {
    background: #0052a3;
    transform: scale(1.05);
}

.button.secondary {
    background: #6c757d;
    box-shadow: 0 4px 15px rgba(108, 117, 125, 0.3);
}

.button.secondary:hover {
    background: #5a6268;
}

footer {
    background: #f8f9fa;
    padding: 30px;
    text-align: center;
    color: #666;
    border-top: 1px solid #e0e0e0;
}

footer a {
    color: #0066cc;
    text-decoration: none;
    transition: color 0.3s;
}

footer a:hover {
    color: #0052a3;
    text-decoration: underline;
}

footer p {
    margin: 5px 0;
}

@media (max-width: 768px) {
    header h1 {
        font-size: 1.8em;
    }
    
    main {
        padding: 20px;
    }
    
    .cards {
        grid-template-columns: 1fr;
    }
}