/* 基础样式 */
    * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
    }

    body {
        font-family: 'Open Sans', sans-serif;
        background: linear-gradient(135deg, #1E2D58, #3A2B7E);
        color: #F0F0F0;
        line-height: 1.6;
        padding: 20px;
    }

    h1, h2, h3, h4 {
        font-family: 'Roboto', sans-serif;
        color: #FFFFFF;
        margin-bottom: 20px;
    }

    h1 {
        font-size: 3rem;
        text-align: center;
        margin-bottom: 40px;
    }

    h2 {
        font-size: 2.5rem;
        margin-top: 40px;
    }

    h3 {
        font-size: 2rem;
        margin-top: 30px;
    }

    h4 {
        font-size: 1.5rem;
        margin-top: 20px;
    }

    p {
        font-size: 1rem;
        margin-bottom: 20px;
    }

    ul {
        list-style-type: disc;
        margin-left: 20px;
        margin-bottom: 20px;
    }

    li {
        margin-bottom: 10px;
    }

    a {
        color: #2C9BF4;
        text-decoration: none;
    }

    a:hover {
        text-decoration: underline;
    }

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

    /* 卡片布局 */
    .grid-container {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: 20px;
        margin-top: 40px;
    }

    .card {
        background: #2C9BF4;
        border-radius: 10px;
        overflow: hidden;
        position: relative;
        transition: transform 0.3s ease, box-shadow 0.3s ease;
        display: flex;
        flex-direction: column;
    }

    .card:hover {
        transform: scale(1.05);
        box-shadow: 0px 10px 20px rgba(44, 155, 244, 0.5);
    }

    .card img {
        width: 100%;
        height: auto;
    }

    .card-content {
        padding: 15px;
        flex: 1;
        display: flex;
        flex-direction: column;
    }

    .card-title {
        font-size: 1.5rem;
        margin-bottom: 10px;
    }

    .card-keywords {
        font-size: 0.9rem;
        margin-bottom: 15px;
        color: #D1E8FF;
    }

    .card-actions {
        margin-top: auto;
        display: flex;
        justify-content: space-between;
    }

    .card-actions a {
        background: #FFFFFF;
        color: #2C9BF4;
        padding: 8px 12px;
        border-radius: 5px;
        font-size: 0.8rem;
        transition: background 0.3s ease, color 0.3s ease;
    }

    .card-actions a:hover {
        background: #2C9BF4;
        color: #FFFFFF;
    }

    /* 示例展示 */
    .example-section {
        background: rgba(255, 255, 255, 0.1);
        padding: 20px;
        border-radius: 10px;
        margin-top: 40px;
    }

    .example-section h2::after {
        content: "（示例展示）";
        font-size: 0.8rem;
        color: #FFD700;
        margin-left: 10px;
    }

    pre {
        background: rgba(0, 0, 0, 0.5);
        padding: 15px;
        border-radius: 5px;
        overflow-x: auto;
        font-family: 'Courier New', Courier, monospace;
    }

    code {
        color: #00FFAA;
    }

    /* 动画 */
    @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;
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        z-index: -1;
    }

    /* 响应式设计 */
    @media (max-width: 1440px) {
        h1 {
            font-size: 2.5rem;
        }
    }

    @media (max-width: 1200px) {
        .grid-container {
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        }
    }

    @media (max-width: 1024px) {
        h1 {
            font-size: 2rem;
        }
        .card-title {
            font-size: 1.25rem;
        }
    }

    @media (max-width: 768px) {
        .grid-container {
            grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        }
        h1 {
            font-size: 1.75rem;
        }
    }

    @media (max-width: 480px) {
        .card-actions {
            flex-direction: column;
            gap: 10px;
        }
    }

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