:root {
        --primary-color: #001F3F; /* 深蓝色 */
        --secondary-color: #000000; /* 黑色 */
        --accent-color-green: #39FF14; /* 亮绿色 */
        --accent-color-gold: #FFD700; /* 金色 */
        --background-gradient: linear-gradient(135deg, #001F3F, #000000);
        --text-color: #FFFFFF;
        --secondary-text-color: #CCCCCC;
        --card-background: rgba(255, 255, 255, 0.1);
        --border-color: #39FF14;
        --button-color: #39FF14;
        --button-hover-color: #2ECC40;
        --transition-speed: 0.3s;
        --font-primary: 'Roboto', sans-serif;
        --font-secondary: 'Open Sans', sans-serif;
    }

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

    body {
        font-family: var(--font-secondary);
        background: var(--background-gradient);
        color: var(--text-color);
        line-height: 1.6;
        padding: 20px;
    }

    header {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        background: rgba(0, 31, 63, 0.9);
        padding: 20px;
        z-index: 1000;
        display: flex;
        justify-content: space-between;
        align-items: center;
        transition: background var(--transition-speed);
    }

    header.scrolled {
        background: rgba(0, 31, 63, 1);
    }

    header .logo {
        font-family: 'Roboto', sans-serif;
        font-size: 24px;
        font-weight: bold;
        color: var(--accent-color-green);
    }

    nav ul {
        list-style: none;
        display: flex;
    }

    nav ul li {
        margin-left: 20px;
    }

    nav ul li a {
        color: var(--text-color);
        text-decoration: none;
        font-size: 16px;
        transition: color var(--transition-speed);
    }

    nav ul li a:hover {
        color: var(--accent-color-green);
    }

    .hero {
        height: 100vh;
        background: var(--background-gradient);
        display: flex;
        justify-content: center;
        align-items: center;
        flex-direction: column;
        text-align: center;
        padding-top: 80px;
    }

    .hero h1 {
        font-family: 'Roboto', sans-serif;
        font-size: 48px;
        margin-bottom: 20px;
        background: linear-gradient(90deg, var(--accent-color-green), var(--accent-color-gold));
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
    }

    .hero p {
        font-size: 18px;
        color: var(--secondary-text-color);
        max-width: 600px;
    }

    .cta-button {
        margin-top: 30px;
        padding: 15px 30px;
        background-color: var(--button-color);
        color: var(--secondary-color);
        border: none;
        border-radius: 25px;
        font-size: 16px;
        cursor: pointer;
        transition: background-color var(--transition-speed), transform var(--transition-speed);
    }

    .cta-button:hover {
        background-color: var(--button-hover-color);
        transform: scale(1.05);
    }

    main {
        max-width: 1200px;
        margin: 0 auto;
        padding: 60px 20px;
    }

    article {
        background: var(--card-background);
        padding: 40px;
        border-radius: 10px;
        box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
        backdrop-filter: blur(8.5px);
        -webkit-backdrop-filter: blur(8.5px);
        border: 1px solid rgba(255, 255, 255, 0.18);
    }

    article h2 {
        font-family: 'Roboto', sans-serif;
        font-size: 32px;
        margin-bottom: 20px;
        color: var(--accent-color-gold);
    }

    article h3 {
        font-family: 'Roboto', sans-serif;
        font-size: 24px;
        margin-top: 30px;
        margin-bottom: 15px;
        color: var(--accent-color-green);
    }

    article p {
        margin-bottom: 15px;
    }

    article code {
        background: rgba(255, 255, 255, 0.2);
        padding: 2px 4px;
        border-radius: 4px;
        color: var(--accent-color-green);
        font-family: 'Courier New', Courier, monospace;
    }

    article pre {
        background: rgba(0, 0, 0, 0.5);
        padding: 15px;
        border-radius: 5px;
        overflow-x: auto;
        margin-bottom: 20px;
    }

    article table {
        width: 100%;
        border-collapse: collapse;
        margin-bottom: 20px;
    }

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

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

    article th {
        background-color: rgba(57, 255, 20, 0.2);
    }

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

    .example-data {
        margin-top: 50px;
    }

    .example-data h2 {
        font-family: 'Roboto', sans-serif;
        font-size: 28px;
        margin-bottom: 20px;
        color: var(--accent-color-gold);
    }

    .example-data ul {
        list-style: none;
    }

    .example-data ul li {
        background: var(--card-background);
        padding: 20px;
        border-radius: 8px;
        margin-bottom: 15px;
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    }

    .example-data ul li h4 {
        margin-bottom: 10px;
        color: var(--accent-color-green);
    }

    .example-data ul li p {
        color: var(--secondary-text-color);
    }

    footer {
        text-align: center;
        padding: 40px 20px;
        background: rgba(0, 31, 63, 0.9);
        color: var(--text-color);
        position: relative;
    }

    footer .cta-button {
        background-color: var(--button-color);
        color: var(--secondary-color);
        padding: 15px 30px;
        border: none;
        border-radius: 25px;
        font-size: 16px;
        cursor: pointer;
        transition: background-color var(--transition-speed), transform var(--transition-speed);
    }

    footer .cta-button:hover {
        background-color: var(--button-hover-color);
        transform: scale(1.05);
    }

    /* Responsive Styles */
    @media (max-width: 1440px) {
        .hero h1 {
            font-size: 40px;
        }
    }

    @media (max-width: 1200px) {
        main {
            padding: 50px 15px;
        }
    }

    @media (max-width: 1024px) {
        header {
            padding: 15px;
        }

        nav ul li {
            margin-left: 15px;
        }

        .hero h1 {
            font-size: 36px;
        }
    }

    @media (max-width: 768px) {
        header {
            flex-direction: column;
            align-items: flex-start;
        }

        nav ul {
            flex-direction: column;
            width: 100%;
        }

        nav ul li {
            margin: 10px 0;
        }

        .hero {
            padding-top: 100px;
        }

        .hero h1 {
            font-size: 28px;
        }

        .cta-button {
            padding: 12px 25px;
            font-size: 14px;
        }

        article {
            padding: 30px;
        }

        .example-data ul li {
            padding: 15px;
        }
    }

    @media (max-width: 480px) {
        header {
            padding: 10px;
        }

        .hero h1 {
            font-size: 24px;
        }

        .hero p {
            font-size: 16px;
        }

        .cta-button {
            padding: 10px 20px;
            font-size: 14px;
        }

        article {
            padding: 20px;
        }

        .example-data ul li {
            padding: 10px;
        }
    }

    @media (max-width: 320px) {
        .hero h1 {
            font-size: 20px;
        }

        .hero p {
            font-size: 14px;
        }

        .cta-button {
            padding: 8px 16px;
            font-size: 12px;
        }

        article h2 {
            font-size: 24px;
        }

        article h3 {
            font-size: 20px;
        }

        footer .cta-button {
            padding: 12px 24px;
            font-size: 14px;
        }
    }

    /* Scroll Animation */
    .fade-in {
        opacity: 0;
        transform: translateY(20px);
        transition: opacity 1s ease-out, transform 1s ease-out;
    }

    .fade-in.visible {
        opacity: 1;
        transform: translateY(0);
    }