/* 全局样式设置 */
body {
    margin: 0;
    font-family: 'Roboto', sans-serif;
    color: #ffffff;
    background: linear-gradient(135deg, #1e0066, #7d00ff, #00ffcc, #ff8c00);
    background-size: 400% 400%;
    animation: gradient-animation 20s ease infinite;
    line-height: 1.6;
}

@keyframes gradient-animation {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

h1, h2, h3, h4 {
    font-family: 'Montserrat', sans-serif;
    font-weight: bold;
    text-shadow: 0px 4px 6px rgba(0, 0, 0, 0.2);
}

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

.header {
    text-align: center;
    padding: 50px 20px;
    position: relative;
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.1);
    z-index: -1;
}

.header img {
    width: 100%;
    max-width: 320px;
    border-radius: 10px;
    margin-bottom: 20px;
}

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

.card {
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    padding: 20px;
    flex: 1 1 calc(33.333% - 40px);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
    text-align: center;
}

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

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

.line {
    position: absolute;
    width: 200px;
    height: 2px;
    background: linear-gradient(to right, #00ffcc, #ff8c00);
    animation: line-animation 2s infinite;
}

@keyframes line-animation {
    0% { transform: translateX(-100px); opacity: 0; }
    50% { opacity: 1; }
    100% { transform: translateX(100px); opacity: 0; }
}

pre {
    background: rgba(0, 0, 0, 0.5);
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 10px;
    overflow: hidden;
}

th, td {
    padding: 10px;
    text-align: left;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

@media (max-width: 768px) {
    .card {
        flex: 1 1 calc(50% - 20px);
    }

    pre {
        font-size: 14px;
    }
}

@media (max-width: 480px) {
    .card {
        flex: 1 1 100%;
    }

    h1 {
        font-size: 24px;
    }

    h2 {
        font-size: 20px;
    }

    p {
        font-size: 14px;
    }
}