/* 基础样式 */
    body {
        margin: 0;
        padding: 0;
        font-family: 'Roboto', sans-serif;
        background: radial-gradient(circle, #003366, transparent);
        color: #ffffff;
    }

    /* 容器布局 */
    .container {
        width: 90%;
        max-width: 1200px;
        margin: 0 auto;
        padding: 20px;
    }

    /* 头部样式 */
    header {
        background: linear-gradient(135deg, #004d33, #003366);
        padding: 20px 0;
        text-align: center;
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    }

    header h1 {
        font-family: 'Montserrat', sans-serif;
        font-size: 2.5em;
        color: #FFD700;
        margin: 0;
    }

    /* 导航栏 */
    nav {
        margin-top: 10px;
    }

    nav ul {
        list-style: none;
        padding: 0;
        display: flex;
        justify-content: center;
        flex-wrap: wrap;
    }

    nav ul li {
        margin: 0 15px;
    }

    nav ul li a {
        color: #ffffff;
        text-decoration: none;
        font-size: 1.1em;
        transition: color 0.3s ease;
    }

    nav ul li a:hover {
        color: #FFD700;
    }

    /* 主内容区 */
    main {
        margin-top: 30px;
    }

    /* 卡片式布局 */
    .card {
        background: rgba(255, 255, 255, 0.1);
        border: 2px solid rgba(255, 215, 0, 0.5);
        border-radius: 10px;
        padding: 20px;
        margin-bottom: 20px;
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
        transition: transform 0.3s ease, box-shadow 0.3s ease;
    }

    .card:hover {
        transform: scale(1.05);
        box-shadow: 0 8px 16px rgba(0, 0, 0, 0.3);
    }

    /* 标题样式 */
    h2, h3, h4 {
        font-family: 'Montserrat', sans-serif;
        color: #FFD700;
    }

    h2 {
        font-size: 2em;
        margin-bottom: 10px;
    }

    h3 {
        font-size: 1.5em;
        margin-top: 20px;
        margin-bottom: 10px;
    }

    h4 {
        font-size: 1.2em;
        margin-top: 15px;
        margin-bottom: 10px;
    }

    /* 段落样式 */
    p {
        font-family: 'Georgia', serif;
        line-height: 1.6;
        color: #f0f0f0;
        margin-bottom: 15px;
    }

    /* 代码块样式 */
    pre {
        background: rgba(0, 0, 0, 0.7);
        padding: 15px;
        border-radius: 8px;
        overflow-x: auto;
    }

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

    /* 列表样式 */
    ul {
        list-style: disc inside;
        margin-bottom: 15px;
    }

    li {
        margin-bottom: 10px;
    }

    /* 图片样式 */
    img {
        max-width: 100%;
        height: auto;
        border-radius: 8px;
        margin-bottom: 15px;
    }

    /* 按钮样式 */
    button {
        background-color: #007bff;
        color: #ffffff;
        border: none;
        padding: 10px 20px;
        border-radius: 5px;
        cursor: pointer;
        transition: all 0.3s ease;
        font-size: 1em;
    }

    button:hover {
        background-color: #0056b3;
        transform: scale(1.1);
    }

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

    .animated-background {
        background: radial-gradient(circle, rgb(255, 87, 34), transparent);
        animation: aurora-move 15s linear infinite;
    }

    /* 数据可视化图表 */
    .chart {
        width: 100%;
        height: 300px;
        background: rgba(255, 255, 255, 0.1);
        border-radius: 10px;
        position: relative;
        overflow: hidden;
    }

    .chart::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-image: url('https://images.gptkong.com/demo/sample1.png');
        background-size: cover;
        opacity: 0.3;
    }

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

        nav ul li a {
            font-size: 1em;
        }

        .card {
            padding: 18px;
        }
    }

    @media (max-width: 1200px) {
        .container {
            width: 95%;
        }

        header h1 {
            font-size: 2em;
        }
    }

    @media (max-width: 1024px) {
        nav ul {
            flex-direction: column;
            align-items: center;
        }

        nav ul li {
            margin: 10px 0;
        }
    }

    @media (max-width: 768px) {
        header h1 {
            font-size: 1.8em;
        }

        h2 {
            font-size: 1.8em;
        }

        h3 {
            font-size: 1.3em;
        }
    }

    @media (max-width: 480px) {
        header h1 {
            font-size: 1.5em;
        }

        nav ul li a {
            font-size: 0.9em;
        }

        button {
            padding: 8px 16px;
            font-size: 0.9em;
        }

        .chart {
            height: 200px;
        }
    }

    @media (max-width: 320px) {
        header h1 {
            font-size: 1.2em;
        }

        h2 {
            font-size: 1.5em;
        }

        h3 {
            font-size: 1.1em;
        }

        p {
            font-size: 0.9em;
        }

        button {
            padding: 6px 12px;
            font-size: 0.8em;
        }
    }

    /* 提示文本样式 */
    .reference-note {
        text-align: center;
        font-style: italic;
        margin-top: 30px;
        color: #FFD700;
    }

    /* 示例展示区 */
    .example-section {
        background: rgba(0, 0, 0, 0.6);
        padding: 20px;
        border-radius: 10px;
        margin-top: 40px;
    }

    .example-section h2 {
        color: #FF8C00;
    }

    .example-section pre {
        background: rgba(255, 215, 0, 0.2);
        border: 1px solid #FFD700;
    }

    /* 奖章样式 */
    .badge {
        width: 50px;
        height: 50px;
        background-image: url('https://images.gptkong.com/demo/sample2.png');
        background-size: cover;
        display: inline-block;
        margin-right: 10px;
    }

    /* 动态提示动画 */
    .floating-tip {
        animation: float 3s ease-in-out infinite;
    }

    @keyframes float {
        0% { transform: translateY(0); }
        50% { transform: translateY(-10px); }
        100% { transform: translateY(0); }
    }