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

    body {
        font-family: 'Roboto', sans-serif;
        line-height: 1.6;
        background: linear-gradient(135deg, #1E3A8A, #6366F1);
        color: #333;
        padding: 20px;
        transition: background 0.5s ease;
    }

    /* 容器布局 */
    .container {
        max-width: 1200px;
        margin: 0 auto;
        padding: 20px;
        background: rgba(255, 255, 255, 0.8);
        border-radius: 10px;
        box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    }

    /* 标题样式 */
    h1, h2, h3, h4, h5, h6 {
        font-weight: bold;
        margin-bottom: 20px;
        color: #1E3A8A;
    }

    h1 {
        font-size: 2.5rem;
        text-align: center;
    }

    h2 {
        font-size: 2rem;
        border-bottom: 2px solid #6366F1;
        padding-bottom: 10px;
    }

    h3 {
        font-size: 1.75rem;
        margin-top: 40px;
    }

    /* 段落样式 */
    p {
        font-size: 1rem;
        margin-bottom: 20px;
        color: #444;
    }

    /* 列表样式 */
    ul, ol {
        margin-bottom: 20px;
        padding-left: 40px;
    }

    li {
        margin-bottom: 10px;
        line-height: 1.5;
    }

    /* 代码块样式 */
    pre {
        background: #f5f5f5;
        padding: 15px;
        border-radius: 5px;
        overflow-x: auto;
        margin-bottom: 20px;
    }

    code {
        font-family: 'Courier New', Courier, monospace;
        color: #d63384;
    }

    /* 图片样式 */
    img {
        max-width: 100%;
        height: auto;
        border-radius: 10px;
        margin-bottom: 20px;
    }

    /* 链接样式 */
    a {
        color: #6366F1;
        text-decoration: none;
        transition: color 0.3s ease;
    }

    a:hover {
        color: #1E3A8A;
    }

    /* 按钮样式 */
    .btn {
        display: inline-block;
        padding: 10px 20px;
        background: linear-gradient(135deg, #1E3A8A, #6366F1);
        color: #fff;
        border: none;
        border-radius: 5px;
        cursor: pointer;
        transition: background 0.3s ease;
        text-align: center;
    }

    .btn:hover {
        background: linear-gradient(135deg, #6366F1, #FFD700);
    }

    /* 卡片布局 */
    .card-container {
        display: flex;
        flex-wrap: wrap;
        gap: 20px;
        justify-content: center;
    }

    .card {
        background: linear-gradient(135deg, #1E3A8A, #6366F1);
        color: #fff;
        padding: 20px;
        border-radius: 10px;
        width: calc(33.333% - 40px);
        box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
        transition: transform 0.3s ease, background 0.3s ease;
    }

    .card:hover {
        transform: translateY(-10px);
        background: linear-gradient(135deg, #6366F1, #FFD700);
    }

    /* 响应式设计 */
    @media (max-width: 1440px) {
        .card {
            width: calc(33.333% - 40px);
        }
    }

    @media (max-width: 1200px) {
        .card {
            width: calc(50% - 40px);
        }
    }

    @media (max-width: 1024px) {
        .card {
            width: 100%;
        }
    }

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

        h2 {
            font-size: 1.75rem;
        }

        h3 {
            font-size: 1.5rem;
        }
    }

    /* 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;
    }

    /* 网格系统 */
    .grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 20px;
    }

    /* 数据可视化图表样式 */
    .chart {
        width: 100%;
        height: 300px;
        background: linear-gradient(135deg, #1E3A8A, #6366F1);
        border-radius: 10px;
        position: relative;
    }

    .chart::before {
        content: '';
        position: absolute;
        top: 10px;
        left: 10px;
        right: 10px;
        bottom: 10px;
        background: #fff;
        border-radius: 10px;
    }

    /* 流线型图案与几何插画 */
    .abstract-illustration {
        width: 100%;
        height: 200px;
        background: linear-gradient(135deg, #1E3A8A, #6366F1);
        border-radius: 10px;
        position: relative;
        overflow: hidden;
    }

    .abstract-illustration::after {
        content: '';
        position: absolute;
        width: 300px;
        height: 300px;
        background: rgba(255, 255, 255, 0.2);
        border-radius: 50%;
        top: -50px;
        left: -50px;
        animation: rotate 20s linear infinite;
    }

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

    /* 视差滚动效果 */
    .parallax {
        background-image: url('https://images.gptkong.com/demo/sample1.png');
        height: 400px;
        background-attachment: fixed;
        background-position: center;
        background-repeat: no-repeat;
        background-size: cover;
        border-radius: 10px;
    }

    /* 提示信息 */
    .reference-note {
        text-align: center;
        font-size: 1.2rem;
        color: #ff5722;
        margin: 20px 0;
    }

    /* 表格样式 */
    table {
        width: 100%;
        border-collapse: collapse;
        margin-bottom: 20px;
    }

    th, td {
        padding: 12px;
        border: 1px solid #ddd;
        text-align: left;
    }

    th {
        background-color: #1E3A8A;
        color: #fff;
    }

    tr:nth-child(even) {
        background-color: #f9f9f9;
    }

    /* 内部链接样式 */
    a[rel="nofollow"] {
        color: #ff9800;
    }

    /* 优化代码展示 */
    pre code {
        display: block;
        padding: 10px;
        background: #272822;
        color: #f8f8f2;
        border-radius: 5px;
        overflow-x: auto;
    }

    /* 按钮动画 */
    .btn-animated {
        background: linear-gradient(135deg, #1E3A8A, #6366F1);
        border: none;
        color: #fff;
        padding: 12px 24px;
        border-radius: 5px;
        cursor: pointer;
        transition: background 0.3s ease, transform 0.3s ease;
    }

    .btn-animated:hover {
        background: linear-gradient(135deg, #6366F1, #FFD700);
        transform: scale(1.05);
    }

    /* 页脚样式 */
    footer {
        text-align: center;
        padding: 20px 0;
        margin-top: 40px;
        background: rgba(30, 58, 138, 0.1);
        border-top: 1px solid #ddd;
    }

    footer p {
        color: #666;
    }

    /* 自适应布局优化 */
    @media (max-width: 480px) {
        .card {
            width: 100%;
        }

        .abstract-illustration {
            height: 150px;
        }

        .parallax {
            height: 200px;
        }
    }