/* 全局样式 */
    * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
    }

    body {
        font-family: 'Roboto', sans-serif;
        background: linear-gradient(135deg, #8BC34A, #FFC107);
        color: #333;
        line-height: 1.6;
        padding: 20px;
        animation: backgroundMove 15s linear infinite;
    }

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

    header {
        background: radial-gradient(circle, #689F38, transparent);
        padding: 40px 20px;
        text-align: center;
        color: white;
        position: relative;
        overflow: hidden;
    }

    header h1 {
        font-family: 'Helvetica', sans-serif;
        font-size: 2.5em;
        margin-bottom: 10px;
    }

    header p {
        font-size: 1.2em;
        color: #FFEB3B;
    }

    nav {
        display: flex;
        justify-content: center;
        gap: 15px;
        margin-top: 20px;
    }

    nav a {
        text-decoration: none;
        color: white;
        padding: 10px 15px;
        border-radius: 20px;
        background: #FF5722;
        transition: transform 0.3s ease, background 0.3s ease;
    }

    nav a:hover {
        transform: scale(1.1);
        background: #E64A19;
    }

    main {
        max-width: 1200px;
        margin: 40px auto;
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 40px;
    }

    article {
        grid-column: 1 / -1;
    }

    article h2 {
        font-family: 'Helvetica', sans-serif;
        font-size: 2em;
        margin-bottom: 20px;
        text-align: center;
    }

    article h3 {
        font-family: 'Helvetica', sans-serif;
        font-size: 1.5em;
        margin: 20px 0 10px;
    }

    article p {
        margin-bottom: 20px;
    }

    article pre {
        background: #f5f5f5;
        padding: 15px;
        border-radius: 10px;
        overflow-x: auto;
    }

    article code {
        font-family: 'Courier New', monospace;
        color: #d32f2f;
    }

    table {
        width: 100%;
        border-collapse: collapse;
        margin: 20px 0;
    }

    table, th, td {
        border: 1px solid #ccc;
    }

    th, td {
        padding: 10px;
        text-align: left;
    }

    th {
        background: #8BC34A;
        color: white;
    }

    .container {
        display: grid;
        grid-template-columns: 1fr 2fr;
        gap: 20px;
    }

    .curve {
        clip-path: polygon(0 0, 100% 0, 100% 80%, 0 100%);
        background: #FFEB3B;
        padding: 20px;
    }

    .image-overlay {
        position: relative;
    }

    .image-overlay::after {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0, 0, 0, 0.3);
    }

    .button {
        border: none;
        padding: 10px 20px;
        border-radius: 50%;
        background: radial-gradient(circle, #D7CCC8, #8D6E63);
        color: white;
        cursor: pointer;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
        transition: transform 0.3s ease-in-out;
    }

    .button:hover {
        transform: scale(1.1);
    }

    .icon-spin {
        animation: spin 2s infinite linear;
    }

    @keyframes spin {
        from { transform: rotate(0deg); }
        to { transform: rotate(360deg); }
    }

    .handwritten {
        font-family: 'Handwritten', cursive;
        color: #FFC107;
    }

    @font-face {
        font-family: 'Handwritten';
        src: url('handwritten-font.woff') format('woff');
    }

    /* 响应式设计 */
    @media (max-width: 1440px) {
        main {
            grid-template-columns: 1fr 1fr;
        }
    }

    @media (max-width: 1200px) {
        main {
            grid-template-columns: 1fr 1fr;
        }
    }

    @media (max-width: 1024px) {
        main {
            grid-template-columns: 1fr;
        }
    }

    @media (max-width: 768px) {
        header h1 {
            font-size: 2em;
        }

        nav {
            flex-direction: column;
            gap: 10px;
        }

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

    @media (max-width: 480px) {
        header {
            padding: 20px 10px;
        }

        main {
            padding: 10px;
        }

        article h2 {
            font-size: 1.8em;
        }

        article h3 {
            font-size: 1.3em;
        }

        nav a {
            padding: 8px 12px;
            font-size: 0.9em;
        }
    }

    @media (max-width: 320px) {
        header h1 {
            font-size: 1.5em;
        }

        article h2 {
            font-size: 1.5em;
        }

        article h3 {
            font-size: 1.1em;
        }

        nav a {
            padding: 6px 10px;
            font-size: 0.8em;
        }
    }

    /* 图片样式 */
    .gallery {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
    }

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

    /* 提示文字 */
    .reference-note {
        text-align: center;
        font-size: 1em;
        color: #555;
        margin: 20px 0;
    }

    /* 动态内容 */
    .dynamic-content {
        animation: fadeIn 2s ease-in-out;
    }

    @keyframes fadeIn {
        from { opacity: 0; }
        to { opacity: 1; }
    }