/*  通用样式  */
body {
    font-family: 'Arial', sans-serif;
    margin: 0;
    padding: 0;
    background: linear-gradient(135deg, #0d0d0d, #1a1a1a);
    color: #e0e0e0;
    overflow-x: hidden;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 20px auto;
    padding: 20px;
}

h2, h3 {
    color: #00bcd4;
    font-weight: bold;
    margin-top: 30px;
    margin-bottom: 15px;
    text-shadow: 0 0 5px rgba(0, 188, 212, 0.5);
}

p {
    line-height: 1.7;
    color: #ccc;
}

ul, ol {
    padding-left: 25px;
    color: #ccc;
}

pre {
    background-color: #263238;
    color: #f0f0f0;
    padding: 15px;
    border-radius: 8px;
    overflow-x: auto;
    font-size: 0.9rem;
    line-height: 1.5;
    tab-size: 4;
    white-space: pre-wrap;
    word-wrap: break-word;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
}

/*  卡片样式  */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 25px;
    margin-top: 20px;
}

.card {
    background: linear-gradient(145deg, #212121, #2e2e2e);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.5);
    transition: transform 0.3s ease-in-out, box-shadow 0.3s ease-in-out;
    cursor: pointer;
    border: 1px solid #37474f;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 188, 212, 0.3);
    border-color: #00bcd4;
}

.card-title {
    color: #00bcd4;
    margin-bottom: 10px;
    font-size: 1.3rem;
    font-weight: bold;
    text-shadow: 0 0 3px rgba(0, 188, 212, 0.7);
}

.card-description {
    color: #ddd;
    font-size: 1rem;
    line-height: 1.6;
}

.card-footer {
    margin-top: 15px;
    padding-top: 10px;
    border-top: 1px dashed #455a64;
    font-size: 0.9rem;
    color: #90a4ae;
}

/*  文章样式  */
article {
    background: linear-gradient(145deg, #212121, #2e2e2e);
    border-radius: 12px;
    padding: 30px;
    margin-top: 30px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.5);
    border: 1px solid #37474f;
}

article h2 {
    color: #ffc107;
    text-align: center;
    text-shadow: 0 0 5px rgba(255, 193, 7, 0.7);
    margin-bottom: 25px;
}

article h3 {
    color: #ff9800;
    margin-top: 25px;
    margin-bottom: 15px;
    text-shadow: 0 0 3px rgba(255, 152, 0, 0.7);
}

article p {
    color: #eee;
    line-height: 1.8;
}

article pre {
    background-color: #37474f;
    color: #e0f7fa;
    box-shadow: 0 3px 7px rgba(0, 0, 0, 0.4);
}

article table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
    margin-bottom: 20px;
    background-color: #263238;
    color: #cfd8dc;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
}

article th, article td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid #455a64;
}

article th {
    background-color: #37474f;
    color: #eceff1;
    font-weight: bold;
}

article tr:last-child td {
    border-bottom: none;
}

/*  页脚样式  */
footer {
    text-align: center;
    padding: 20px 0;
    color: #78909c;
    font-size: 0.9rem;
    margin-top: 40px;
}

/*  响应式布局  */
@media (max-width: 768px) {
    .container {
        width: 95%;
        padding: 15px;
    }

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

    article {
        padding: 20px;
    }

    article h2 {
        font-size: 1.8rem;
    }

    article h3 {
        font-size: 1.2rem;
    }

    article p, article li {
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .container {
        width: 100%;
        padding: 10px;
    }

    h2 {
        font-size: 1.6rem;
    }

    h3 {
        font-size: 1.1rem;
    }

    p, li {
        font-size: 0.95rem;
    }
}