/* 基础重置 */
    * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
    }

    /* 变量定义 */
    :root {
        --background-color: #1F1F1F;
        --primary-gradient: linear-gradient(135deg, #4A56D6, #8C52FF);
        --accent-color: #FFD700;
        --text-color: #FFFFFF;
        --card-background: #2B2B2B;
        --shadow-color: rgba(0, 0, 0, 0.1);
        --font-family: 'Roboto', sans-serif;
        --transition-speed: 0.3s;
        --padding: 20px;
        --container-max-width: 1200px;
    }

    body {
        background-color: var(--background-color);
        color: var(--text-color);
        font-family: var(--font-family);
        line-height: 1.6;
        padding: var(--padding);
    }

    header {
        background: var(--primary-gradient);
        padding: 20px;
        text-align: center;
        position: relative;
    }

    header h1 {
        font-size: 2.5em;
        font-weight: bold;
        color: var(--accent-color);
    }

    nav {
        position: fixed;
        top: 0;
        left: 0;
        width: 60px;
        height: 100%;
        background-color: rgba(31, 31, 31, 0.9);
        display: flex;
        flex-direction: column;
        align-items: center;
        padding-top: 60px;
        transition: width var(--transition-speed) ease;
        z-index: 1000;
    }

    nav:hover {
        width: 200px;
    }

    nav a {
        width: 100%;
        padding: 15px 10px;
        text-align: center;
        text-decoration: none;
        color: var(--text-color);
        transition: all var(--transition-speed) ease;
        position: relative;
    }

    nav a:hover {
        background-color: var(--primary-gradient);
    }

    nav a span {
        display: none;
        margin-left: 10px;
    }

    nav:hover a span {
        display: inline;
    }

    main {
        margin-left: 60px;
        padding: 20px;
        max-width: var(--container-max-width);
        margin: 20px auto;
    }

    .container {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
        gap: 20px;
    }

    .card {
        background-color: var(--card-background);
        border-radius: 8px;
        padding: 20px;
        box-shadow: 0 4px 6px var(--shadow-color);
        transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
    }

    .card:hover {
        transform: translateY(-10px);
        box-shadow: 0 10px 15px var(--shadow-color);
    }

    h2, h3, h4 {
        color: var(--accent-color);
        margin-bottom: 10px;
    }

    h2 {
        font-size: 2em;
        margin-top: 20px;
    }

    h3 {
        font-size: 1.5em;
        margin-top: 15px;
    }

    h4 {
        font-size: 1.2em;
        margin-top: 10px;
    }

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

    pre {
        background-color: #2B2B2B;
        padding: 15px;
        border-radius: 5px;
        overflow-x: auto;
        margin-bottom: 15px;
    }

    code {
        color: #FFD700;
        font-family: 'Courier New', Courier, monospace;
    }

    table {
        width: 100%;
        border-collapse: collapse;
        margin-bottom: 15px;
    }

    table, th, td {
        border: 1px solid #4A56D6;
    }

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

    th {
        background-color: #4A56D6;
    }

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

    .loader {
        width: 50px;
        height: 50px;
        margin: 0 auto;
        border: 5px solid #4A56D6;
        border-top: 5px solid var(--accent-color);
        border-radius: 50%;
        animation: spin 1s linear infinite;
    }

    @keyframes spin {
        0% { transform: rotate(0deg); }
        100% { transform: rotate(360deg); }
    }

    .animation-example {
        background: radial-gradient(circle, rgb(255, 87, 34), transparent);
        animation: aurora-move 15s linear infinite;
        height: 200px;
        border-radius: 50%;
    }

    @keyframes aurora-move {
        0% { transform: translateY(0) rotate(0deg); }
        50% { transform: translateY(-50px) rotate(180deg); }
        100% { transform: translateY(0) rotate(360deg); }
    }

    .image-gallery {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
        margin-bottom: 20px;
    }

    .image-gallery img {
        width: 100%;
        max-width: 150px;
        border-radius: 5px;
    }

    .code-preview {
        background-color: #1F1F1F;
        padding: 15px;
        border-left: 5px solid var(--accent-color);
        margin-bottom: 20px;
    }

    .note {
        background-color: #333333;
        padding: 10px;
        border-left: 3px solid #FFD700;
        margin-bottom: 20px;
        font-style: italic;
    }

    footer {
        text-align: center;
        padding: 20px;
        background-color: rgba(31, 31, 31, 0.9);
        color: #AAAAAA;
        margin-top: 40px;
    }

    /* 响应式设计 */
    @media (max-width: 1440px) {
        main {
            max-width: 1100px;
        }
    }

    @media (max-width: 1200px) {
        main {
            max-width: 900px;
        }
    }

    @media (max-width: 1024px) {
        nav {
            width: 50px;
        }

        nav:hover {
            width: 180px;
        }

        nav a span {
            display: none;
        }

        nav:hover a span {
            display: inline;
        }

        .image-gallery img {
            max-width: 120px;
        }
    }

    @media (max-width: 768px) {
        nav {
            flex-direction: row;
            width: 100%;
            height: 60px;
            bottom: 0;
            top: auto;
            justify-content: center;
        }

        nav:hover {
            height: 120px;
            width: 100%;
        }

        nav a {
            padding: 10px;
        }

        nav a span {
            display: none;
        }

        main {
            margin: 80px 10px 10px 10px;
            padding: 10px;
        }

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

        .image-gallery img {
            max-width: 100px;
        }
    }

    @media (max-width: 480px) {
        header h1 {
            font-size: 1.8em;
        }

        h2 {
            font-size: 1.8em;
        }

        h3 {
            font-size: 1.3em;
        }

        h4 {
            font-size: 1em;
        }

        pre, .code-preview {
            font-size: 0.9em;
        }

        .loader {
            width: 40px;
            height: 40px;
        }
    }

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

        nav {
            padding-top: 40px;
        }

        nav a {
            padding: 10px 5px;
        }

        main {
            margin: 70px 5px 5px 5px;
            padding: 5px;
        }

        .container {
            grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        }

        .image-gallery img {
            max-width: 80px;
        }

        .loader {
            width: 30px;
            height: 30px;
        }
    }