:root {
        --primary-color: #0D47A1; /* 深蓝色 */
        --secondary-color: #00897B; /* 青绿色 */
        --highlight-color: #FFB74D; /* 橙黄色 */
        --background-gradient: radial-gradient(circle at top left, #0D47A1, #0288D1, #81D4FA);
        --font-family-primary: 'Roboto', sans-serif;
        --font-family-secondary: 'Inter', sans-serif;
        --transition-speed: 0.3s;
    }

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

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

    header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 20px 0;
        border-bottom: 2px solid rgba(255, 255, 255, 0.2);
    }

    header .logo {
        font-size: 1.8rem;
        font-weight: bold;
        color: var(--highlight-color);
    }

    nav ul {
        list-style: none;
        display: flex;
        gap: 15px;
    }

    nav ul li a {
        color: #FFFFFF;
        text-decoration: none;
        font-size: 1rem;
        transition: color var(--transition-speed);
    }

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

    .hero {
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        justify-content: space-between;
        padding: 40px 0;
    }

    .hero .text {
        flex: 1 1 45%;
        padding: 20px;
    }

    .hero .text h1 {
        font-size: 2.5rem;
        margin-bottom: 20px;
        color: var(--highlight-color);
    }

    .hero .text p {
        font-size: 1.2rem;
        margin-bottom: 30px;
    }

    .hero .cta-buttons a {
        display: inline-block;
        padding: 10px 20px;
        margin-right: 15px;
        background: var(--highlight-color);
        color: #0D47A1;
        text-decoration: none;
        border-radius: 5px;
        transition: background var(--transition-speed), transform var(--transition-speed);
    }

    .hero .cta-buttons a:hover {
        background: #FFA726;
        transform: translateY(-3px);
    }

    .hero img {
        flex: 1 1 45%;
        max-width: 100%;
        border-radius: 10px;
        animation: float 6s ease-in-out infinite;
    }

    @keyframes float {
        0%, 100% {
            transform: translateY(0);
        }
        50% {
            transform: translateY(-20px);
        }
    }

    section {
        padding: 60px 0;
    }

    .features {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 30px;
    }

    .feature {
        background: rgba(255, 255, 255, 0.1);
        padding: 20px;
        border-radius: 10px;
        text-align: center;
        transition: transform var(--transition-speed), background var(--transition-speed);
    }

    .feature:hover {
        transform: scale(1.05);
        background: rgba(255, 255, 255, 0.2);
    }

    .feature img {
        width: 80px;
        margin-bottom: 15px;
    }

    .feature h3 {
        margin-bottom: 10px;
        color: var(--highlight-color);
    }

    .feature p {
        font-size: 1rem;
    }

    .sample-article {
        background: rgba(255, 255, 255, 0.1);
        padding: 30px;
        border-radius: 10px;
        margin-top: 40px;
    }

    .sample-article h2 {
        color: var(--highlight-color);
        margin-bottom: 20px;
    }

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

    .sample-article code {
        color: #FF9800;
        font-family: 'Courier New', Courier, monospace;
    }

    .responsive-images {
        display: flex;
        flex-wrap: wrap;
        gap: 15px;
        margin-top: 30px;
    }

    .responsive-images img {
        width: calc(25% - 15px);
        border-radius: 10px;
        transition: transform var(--transition-speed);
    }

    .responsive-images img:hover {
        transform: scale(1.1);
    }

    footer {
        text-align: center;
        padding: 20px 0;
        border-top: 2px solid rgba(255, 255, 255, 0.2);
        margin-top: 40px;
    }

    footer p {
        font-size: 0.9rem;
        color: #FFFFFF;
    }

    /* Animation for background elements */
    .background-effect {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: radial-gradient(circle, rgba(255,87,34,0.3), transparent);
        animation: aurora-move 15s linear infinite;
        z-index: -1;
    }

    @keyframes aurora-move {
        0% {
            transform: rotate(0deg);
        }
        100% {
            transform: rotate(360deg);
        }
    }

    /* Media Queries */
    @media (max-width: 1440px) {
        .hero .text h1 {
            font-size: 2.2rem;
        }
    }

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

    @media (max-width: 1024px) {
        .hero {
            flex-direction: column;
            text-align: center;
        }

        .hero .text, .hero img {
            flex: 1 1 100%;
        }

        .responsive-images img {
            width: calc(33.33% - 15px);
        }
    }

    @media (max-width: 768px) {
        nav ul {
            flex-direction: column;
            align-items: center;
        }

        .features {
            grid-template-columns: 1fr;
        }

        .responsive-images img {
            width: calc(50% - 15px);
        }
    }

    @media (max-width: 480px) {
        header {
            flex-direction: column;
        }

        nav ul {
            flex-direction: column;
            gap: 10px;
        }

        .hero .text h1 {
            font-size: 1.8rem;
        }

        .responsive-images img {
            width: 100%;
        }
    }

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

        .hero .text p {
            font-size: 1rem;
        }
    }

    /* Table styling */
    table {
        width: 100%;
        border-collapse: collapse;
        margin-top: 20px;
    }

    table, th, td {
        border: 1px solid rgba(255, 255, 255, 0.3);
    }

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

    th {
        background: rgba(255, 183, 77, 0.5);
    }

    /* Button styling */
    .btn {
        padding: 10px 20px;
        background: var(--highlight-color);
        color: #0D47A1;
        text-decoration: none;
        border-radius: 5px;
        transition: background var(--transition-speed);
    }

    .btn:hover {
        background: #FFA726;
    }