@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@400;700&display=swap');

    :root {
        --primary-color: #0047AB; /* 深蓝色 */
        --secondary-color: #FFFFFF; /* 白色 */
        --accent-color: #8A2BE2; /* 霓虹紫 */
        --grey-color: #A9A9A9; /* 金属灰 */
        --background-gradient: radial-gradient(circle, rgb(0, 71, 171), rgba(0, 71, 171, 0.8));
    }

    * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
    }

    body {
        font-family: 'Roboto', sans-serif;
        background: var(--background-gradient);
        color: var(--primary-color);
        line-height: 1.6;
        padding: 20px;
    }

    header {
        text-align: center;
        padding: 50px 0;
        position: relative;
    }

    header h1 {
        font-size: 2.5rem;
        color: var(--secondary-color);
        margin-bottom: 10px;
    }

    header p {
        font-size: 1.2rem;
        color: var(--accent-color);
    }

    nav {
        display: flex;
        justify-content: center;
        gap: 20px;
        margin-bottom: 40px;
    }

    nav a {
        text-decoration: none;
        color: var(--secondary-color);
        font-weight: 500;
        position: relative;
    }

    nav a::after {
        content: '';
        display: block;
        width: 0;
        height: 2px;
        background: var(--accent-color);
        transition: width 0.3s;
    }

    nav a:hover::after {
        width: 100%;
    }

    .container {
        max-width: 1200px;
        margin: 0 auto;
    }

    .card {
        background: rgba(255, 255, 255, 0.1);
        padding: 20px;
        border-radius: 10px;
        box-shadow: 0 4px 6px rgba(0,0,0,0.1);
        backdrop-filter: blur(10px);
        transition: transform 0.3s, box-shadow 0.3s;
    }

    .card:hover {
        transform: translateY(-10px);
        box-shadow: 0 10px 15px rgba(0,0,0,0.2);
    }

    h2, h3 {
        color: var(--secondary-color);
        margin-bottom: 20px;
    }

    p {
        margin-bottom: 15px;
    }

    ul {
        list-style-type: disc;
        margin-left: 20px;
        margin-bottom: 15px;
    }

    pre {
        background: rgba(0, 0, 0, 0.7);
        padding: 15px;
        border-radius: 5px;
        overflow-x: auto;
        margin-bottom: 20px;
    }

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

    img {
        max-width: 100%;
        height: auto;
        border-radius: 10px;
        margin-bottom: 20px;
    }

    .example-display {
        background: rgba(255, 255, 255, 0.2);
        padding: 30px;
        border-radius: 15px;
        margin-top: 50px;
    }

    .example-display h2 {
        text-align: center;
        margin-bottom: 30px;
    }

    footer {
        text-align: center;
        padding: 30px 0;
        color: var(--grey-color);
        margin-top: 50px;
    }

    @media (max-width: 1440px) {
        header h1 {
            font-size: 2.2rem;
        }

        nav {
            gap: 15px;
        }
    }

    @media (max-width: 1200px) {
        .container {
            padding: 0 20px;
        }

        .card {
            padding: 15px;
        }
    }

    @media (max-width: 1024px) {
        nav {
            flex-wrap: wrap;
        }

        .example-display {
            padding: 20px;
        }
    }

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

        nav {
            flex-direction: column;
            align-items: center;
        }
    }

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

        .card {
            padding: 10px;
        }
    }

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

        nav a {
            font-size: 0.9rem;
        }
    }

    /* Aurora Animation */
    @keyframes aurora-move {
        0% {
            background-position: 0% 50%;
        }
        50% {
            background-position: 100% 50%;
        }
        100% {
            background-position: 0% 50%;
        }
    }

    .background-aurora {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: radial-gradient(circle, rgb(255, 87, 34), transparent);
        animation: aurora-move 15s linear infinite;
        z-index: -1;
    }