/* 基础样式 */
    body {
        margin: 0;
        padding: 0;
        background: linear-gradient(135deg, #0A2463, #4B0082);
        color: #ffffff;
        font-family: 'Roboto', sans-serif;
        line-height: 1.6;
    }

    /* 容器 */
    .container {
        width: 90%;
        max-width: 1200px;
        margin: 0 auto;
        padding: 40px 0;
    }

    /* 标题样式 */
    h1, h2, h3, h4 {
        font-family: 'Poppins', sans-serif;
        color: #FFD700;
        text-transform: uppercase;
        letter-spacing: 2px;
        margin-bottom: 20px;
    }

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

    h2 {
        font-size: 2em;
        border-bottom: 2px solid #FFD700;
        padding-bottom: 10px;
    }

    h3 {
        font-size: 1.75em;
        color: #FFA500;
    }

    h4 {
        font-size: 1.5em;
        color: #FF8C00;
    }

    /* 段落样式 */
    p {
        font-size: 1em;
        margin-bottom: 15px;
        padding: 0 10px;
    }

    /* 代码块样式 */
    pre {
        background: rgba(255, 255, 255, 0.1);
        padding: 15px;
        border-radius: 8px;
        overflow-x: auto;
        margin-bottom: 20px;
    }

    code {
        font-family: 'Courier New', Courier, monospace;
        color: #00FF7F;
        background: rgba(0, 0, 0, 0.5);
        padding: 2px 4px;
        border-radius: 4px;
    }

    /* 链接样式 */
    a {
        color: #FFD700;
        text-decoration: none;
    }

    a:hover {
        text-decoration: underline;
    }

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

    /* 卡片样式 */
    .card {
        background: rgba(255, 255, 255, 0.1);
        border-radius: 10px;
        padding: 20px;
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        transition: transform 0.3s ease, box-shadow 0.3s ease;
        position: relative;
    }

    .card:hover {
        transform: scale(1.05) rotate(1deg);
        box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
    }

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

    /* 示例数据展示 */
    .example {
        background: rgba(255, 255, 255, 0.05);
        padding: 30px;
        border-radius: 10px;
        margin-top: 40px;
    }

    .example h2 {
        color: #00FFFF;
    }

    /* 粒子效果 */
    .particles {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        pointer-events: none;
        z-index: -1;
    }

    .particle {
        position: absolute;
        width: 5px;
        height: 5px;
        background: rgba(255, 255, 255, 0.8);
        border-radius: 50%;
        animation: float 5s infinite;
    }

    @keyframes float {
        0% {
            transform: translateY(0) scale(1);
            opacity: 1;
        }
        100% {
            transform: translateY(-1000px) scale(0.5);
            opacity: 0;
        }
    }

    /* 动画效果 */
    .flip-card {
        perspective: 1000px;
    }

    .flip-card-inner {
        position: relative;
        width: 100%;
        height: 100%;
        text-align: center;
        transition: transform 0.6s;
        transform-style: preserve-3d;
    }

    .flip-card:hover .flip-card-inner {
        transform: rotateY(180deg);
    }

    .flip-card-front, .flip-card-back {
        position: absolute;
        width: 100%;
        backface-visibility: hidden;
        border-radius: 8px;
    }

    .flip-card-back {
        background: rgba(255, 255, 255, 0.2);
        transform: rotateY(180deg);
        padding: 20px;
    }

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

        h2 {
            font-size: 1.8em;
        }

        h3 {
            font-size: 1.5em;
        }

        h4 {
            font-size: 1.3em;
        }
    }

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

    @media (max-width: 1024px) {
        .grid {
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        }
    }

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

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

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

        p, code {
            font-size: 0.9em;
        }
    }

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

        p, code {
            font-size: 0.8em;
        }
    }

    /* 提示文字 */
    .note {
        text-align: center;
        font-size: 1em;
        margin-top: 40px;
        color: #FFA500;
    }