* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Helvetica Neue', Arial, sans-serif;
}

body {
    background-color: #f8f9fa;
    color: #333;
    line-height: 1.6;
}

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

body .container > header {
    background: linear-gradient(135deg, #6a11cb 0%, #2575fc 100%);
    color: white;
    padding: 40px 20px;
    text-align: center;
    border-radius: 10px;
    margin-bottom: 30px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

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

.subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
}

.content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.card {
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.15);
}

.card-img-container {
    width: 100%;
    flex-shrink: 0;
    overflow: hidden;
}

.card-img {
    width: 100%;
    display: block;
    /* 不再使用固定高度，让图片按比例显�?*/
}

.card-content {
    padding: 20px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.card h3 {
    margin-bottom: 10px;
    color: #2c3e50;
}

.card p {
    color: #555;
    margin-bottom: 15px;
    flex-grow: 1;
}

.feature-section {
    background: white;
    padding: 40px;
    border-radius: 10px;
    margin-bottom: 40px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.feature-section h2 {
    text-align: center;
    margin-bottom: 30px;
    color: #2c3e50;
}

.features {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-around;
    gap: 20px;
}

.feature {
    flex: 1;
    min-width: 250px;
    text-align: center;
    padding: 20px;
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 15px;
    color: #3498db;
}

.feature h3 {
    margin-bottom: 10px;
    color: #2c3e50;
}


/* 响应式设�?*/
@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }

    .subtitle {
        font-size: 1rem;
    }

    .content-grid {
        grid-template-columns: 1fr;
    }

    .feature-section {
        padding: 20px;
    }

    .feature {
        min-width: 100%;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 10px;
    }

    header {
        padding: 20px 10px;
    }

    h1 {
        font-size: 1.8rem;
    }

    .card-content {
        padding: 15px;
    }
}