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

    html, body {
        height: 100%;
        font-family: 'Poppins', sans-serif;
        color: #ffffff;
        background: linear-gradient(135deg, #00bfff, #8a2be2);
        animation: aurora-move 15s linear infinite;
    }

    body {
        display: flex;
        flex-direction: column;
        align-items: center;
        padding: 20px;
    }

    header {
        width: 100%;
        text-align: center;
        padding: 20px 0;
        background: rgba(0, 0, 0, 0.5);
        border-radius: 10px;
        margin-bottom: 20px;
    }

    header h1 {
        font-size: 2.5em;
        font-weight: bold;
        color: #ffd700;
    }

    main {
        max-width: 1200px;
        width: 100%;
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 20px;
    }

    .card {
        background: rgba(255, 255, 255, 0.1);
        border: 2px solid rgba(255, 215, 0, 0.5);
        border-radius: 15px;
        padding: 20px;
        box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
        transition: transform 0.3s ease, border-color 0.3s ease;
    }

    .card:hover {
        transform: translateY(-10px);
        border-color: #ffd700;
    }

    .card img {
        width: 100%;
        height: auto;
        border-radius: 10px;
        margin-bottom: 15px;
    }

    .card h2 {
        font-size: 1.8em;
        margin-bottom: 10px;
        color: #ffcc00;
    }

    .card p {
        font-size: 1em;
        line-height: 1.6;
    }

    pre {
        background: rgba(0, 0, 0, 0.7);
        padding: 15px;
        border-radius: 10px;
        overflow-x: auto;
        font-family: 'Courier New', Courier, monospace;
        margin-top: 10px;
    }

    code {
        color: #00ffea;
    }

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

    table, th, td {
        border: 1px solid #ffd700;
    }

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

    th {
        background: rgba(255, 215, 0, 0.3);
    }

    footer {
        width: 100%;
        text-align: center;
        padding: 20px 0;
        background: rgba(0, 0, 0, 0.5);
        border-radius: 10px;
        margin-top: 20px;
    }

    footer p {
        font-size: 1em;
        color: #ffffff;
    }

    /* 动画关键帧 */
    @keyframes aurora-move {
        0% {
            background: linear-gradient(135deg, #00bfff, #8a2be2);
        }
        50% {
            background: linear-gradient(225deg, #8a2be2, #00bfff);
        }
        100% {
            background: linear-gradient(135deg, #00bfff, #8a2be2);
        }
    }

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

    @media (max-width: 1200px) {
        main {
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        }
    }

    @media (max-width: 1024px) {
        header h1 {
            font-size: 2em;
        }
    }

    @media (max-width: 768px) {
        main {
            grid-template-columns: 1fr;
        }

        .card h2 {
            font-size: 1.5em;
        }

        .card p {
            font-size: 0.9em;
        }
    }

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

        .card {
            padding: 15px;
        }

        pre {
            font-size: 0.8em;
        }
    }

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

        .card h2 {
            font-size: 1.2em;
        }

        .card p {
            font-size: 0.8em;
        }
    }