/* 全局样式定义 */
body {
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background: linear-gradient(135deg, #1a237e, #651fff);
    color: white;
    overflow-x: hidden;
}

h1, h2, h3 {
    font-family: 'Orbitron', sans-serif;
    font-weight: bold;
    color: #ff4081;
}

.container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.header {
    text-align: center;
    padding: 50px 20px;
    background: linear-gradient(45deg, #304ffe, #ec407a);
    width: 100%;
}

.header h1 {
    font-size: 3rem;
    margin: 0;
}

.article {
    background-color: rgba(0, 0, 0, 0.6);
    border-radius: 15px;
    padding: 30px;
    margin: 20px 0;
    max-width: 900px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    padding: 20px;
    width: 100%;
}

.card {
    background-color: #1a237e;
    color: white;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease-in-out;
    padding: 20px;
    position: relative;
    overflow: hidden;
}

.card:hover {
    transform: scale(1.05);
}

.card::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    opacity: 0;
    transition: all 0.5s ease-in-out;
}

.card:hover::before {
    width: 200%;
    height: 200%;
    opacity: 1;
}

.card img {
    width: 100%;
    height: auto;
    border-radius: 10px;
}

.code-block {
    background-color: #0d47a1;
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto;
    font-family: 'Courier New', Courier, monospace;
    color: #bbdefb;
    margin: 15px 0;
}

@media (max-width: 768px) {
    .card-grid {
        grid-template-columns: 1fr;
    }

    .header h1 {
        font-size: 2rem;
    }
}