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

    /* 全局样式 */
    body {
        font-family: 'Inter', sans-serif;
        background: radial-gradient(circle at center, #2c3e50, #000000);
        color: #ecf0f1;
        line-height: 1.6;
        padding: 20px;
    }

    h1, h2, h3, h4 {
        font-family: 'Roboto', sans-serif;
        color: #bdc3c7;
        margin-bottom: 15px;
    }

    h1 {
        font-size: 2.5em;
        text-align: center;
        margin-bottom: 30px;
    }

    h2 {
        font-size: 2em;
        margin-top: 40px;
    }

    h3 {
        font-size: 1.75em;
        margin-top: 30px;
    }

    h4 {
        font-size: 1.5em;
        margin-top: 25px;
    }

    p {
        margin-bottom: 15px;
        font-size: 1em;
    }

    ul {
        list-style: disc inside;
        margin-bottom: 15px;
    }

    /* 容器和网格布局 */
    .container {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: 20px;
        padding: 20px 0;
    }

    /* 卡片样式 */
    .card {
        background: linear-gradient(135deg, #8e44ad, #2980b9);
        border: 2px solid rgba(255, 255, 255, 0.2);
        border-radius: 15px;
        box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
        overflow: hidden;
        transition: transform 0.3s ease, box-shadow 0.3s ease;
    }

    .card:hover {
        transform: scale(1.05);
        box-shadow: 0 8px 25px rgba(0, 0, 0, 0.5);
    }

    .card img {
        width: 100%;
        height: auto;
        display: block;
    }

    .card-content {
        padding: 15px;
    }

    .card-title {
        font-size: 1.5em;
        margin-bottom: 10px;
        color: #ecf0f1;
    }

    .card-description {
        font-size: 1em;
        color: #bdc3c7;
    }

    /* 示例展示样式 */
    .example-article {
        background: rgba(44, 62, 80, 0.9);
        padding: 20px;
        border-radius: 10px;
        margin-top: 30px;
    }

    .example-article pre {
        background: #1abc9c;
        padding: 10px;
        border-radius: 5px;
        overflow-x: auto;
        margin-bottom: 15px;
    }

    .example-article code {
        color: #2c3e50;
        font-family: 'Courier New', Courier, monospace;
    }

    /* 提示文本 */
    .prompt {
        text-align: center;
        font-size: 1.2em;
        margin-bottom: 20px;
        color: #95a5a6;
    }

    /* 链接样式 */
    a {
        color: #1abc9c;
        text-decoration: none;
    }

    a:hover {
        text-decoration: underline;
    }

    /* 动画效果 */
    @keyframes aurora-move {
        0% { background-position: 0% 50%; }
        50% { background-position: 100% 50%; }
        100% { background-position: 0% 50%; }
    }

    body {
        background-size: 400% 400%;
        animation: aurora-move 15s linear infinite;
    }

    @keyframes particleEffect {
        0% {
            transform: scale(0);
            opacity: 1;
        }
        100% {
            transform: scale(1.5);
            opacity: 0;
        }
    }

    .particle {
        position: absolute;
        width: 10px;
        height: 10px;
        background: #ecf0f1;
        border-radius: 50%;
        animation: particleEffect 2s infinite;
    }

    /* 响应式设计 */
    @media (max-width: 1440px) {
        h1 {
            font-size: 2.2em;
        }
        h2 {
            font-size: 1.8em;
        }
        h3 {
            font-size: 1.5em;
        }
    }

    @media (max-width: 1200px) {
        .container {
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        }
    }

    @media (max-width: 1024px) {
        h1 {
            font-size: 2em;
        }
        h2 {
            font-size: 1.6em;
        }
    }

    @media (max-width: 768px) {
        .container {
            grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        }
        .card-title {
            font-size: 1.2em;
        }
    }

    @media (max-width: 480px) {
        h1 {
            font-size: 1.8em;
        }
        .card-title {
            font-size: 1em;
        }
    }

    @media (max-width: 320px) {
        body {
            padding: 10px;
        }
        .card {
            border-radius: 10px;
        }
    }