:root {
        --primary-color: #1a1a40; /* 深蓝色 */
        --secondary-color: #7e57c2; /* 紫色 */
        --accent-color: #03a9f4; /* 电蓝色 */
        --highlight-color: #32cd32; /* 荧光绿色 */
        --background-gradient: linear-gradient(135deg, #1a1a40, #7e57c2, #03a9f4, #32cd32);
        --font-family: 'Orbitron', sans-serif;
        --transition-speed: 0.3s;
    }

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

    body {
        background: var(--background-gradient);
        font-family: var(--font-family);
        color: white;
        line-height: 1.6;
        overflow-x: hidden;
    }

    header {
        width: 100%;
        height: 100vh;
        background: url('https://images.gptkong.com/demo/sample1.png') no-repeat center center/cover;
        display: flex;
        justify-content: center;
        align-items: center;
        text-align: center;
        position: relative;
    }

    header::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(26, 26, 64, 0.7);
    }

    header h1 {
        position: relative;
        font-size: 4rem;
        animation: fadeInRotate 2s ease-in-out;
    }

    @keyframes fadeInRotate {
        from {
            opacity: 0;
            transform: rotateY(-90deg);
        }
        to {
            opacity: 1;
            transform: rotateY(0deg);
        }
    }

    nav {
        position: fixed;
        top: 20px;
        right: 20px;
        display: flex;
        gap: 15px;
        z-index: 1000;
    }

    nav a {
        text-decoration: none;
        color: white;
        padding: 10px 15px;
        border: 2px solid var(--accent-color);
        border-radius: 5px;
        transition: all var(--transition-speed) ease;
    }

    nav a:hover {
        background: var(--accent-color);
        color: var(--primary-color);
    }

    .section {
        min-height: 100vh;
        padding: 60px 20px;
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        scroll-snap-align: start;
    }

    .section:nth-child(even) {
        background: rgba(0, 0, 0, 0.5);
    }

    h2, h3 {
        margin-bottom: 20px;
        font-size: 2.5rem;
        text-align: center;
    }

    p {
        max-width: 800px;
        margin-bottom: 20px;
        text-align: justify;
    }

    pre {
        background: rgba(255, 255, 255, 0.1);
        padding: 20px;
        border-radius: 10px;
        overflow-x: auto;
        width: 90%;
        max-width: 800px;
        margin: 20px 0;
    }

    code {
        color: #03a9f4;
        font-family: 'Courier New', Courier, monospace;
    }

    table {
        width: 90%;
        max-width: 800px;
        border-collapse: collapse;
        margin: 20px 0;
    }

    table, th, td {
        border: 1px solid var(--accent-color);
    }

    th, td {
        padding: 15px;
        text-align: center;
    }

    th {
        background: var(--secondary-color);
    }

    .button {
        position: relative;
        padding: 15px 30px;
        background: var(--accent-color);
        border: none;
        border-radius: 50px;
        color: var(--primary-color);
        font-size: 1.2rem;
        cursor: pointer;
        overflow: hidden;
        transition: background var(--transition-speed) ease;
        margin-top: 20px;
    }

    .button::before {
        content: '';
        position: absolute;
        top: 50%;
        left: 50%;
        width: 0;
        height: 0;
        background: rgba(255, 255, 255, 0.5);
        border-radius: 50%;
        transform: translate(-50%, -50%);
        transition: all 0.5s ease;
    }

    .button:hover::before {
        width: 200px;
        height: 200px;
    }

    .button:hover {
        background: var(--highlight-color);
    }

    .particles {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        pointer-events: none;
        background: radial-gradient(circle, transparent, var(--primary-color));
        z-index: -1;
    }

    .particle {
        position: absolute;
        width: 5px;
        height: 5px;
        background: var(--accent-color);
        border-radius: 50%;
        animation: moveParticle 5s infinite linear;
    }

    @keyframes moveParticle {
        from {
            transform: translateY(0);
        }
        to {
            transform: translateY(-100vh);
        }
    }

    /* Responsive Design */
    @media (max-width: 320px) {
        h1 {
            font-size: 2rem;
        }
        h2, h3 {
            font-size: 1.5rem;
        }
        .button {
            padding: 10px 20px;
            font-size: 1rem;
        }
    }

    @media (max-width: 480px) {
        h1 {
            font-size: 2.5rem;
        }
        h2, h3 {
            font-size: 2rem;
        }
    }

    @media (max-width: 768px) {
        .section {
            padding: 40px 15px;
        }
        pre, table {
            width: 100%;
        }
    }

    @media (max-width: 1024px) {
        nav {
            flex-direction: column;
            top: 10px;
            right: 10px;
        }
    }

    @media (min-width: 1200px) {
        h1 {
            font-size: 5rem;
        }
        h2, h3 {
            font-size: 3rem;
        }
    }

    @media (min-width: 1440px) {
        h1 {
            font-size: 6rem;
        }
        h2, h3 {
            font-size: 3.5rem;
        }
    }