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

    :root {
        --primary-color: #032B44; /* 深蓝色 */
        --secondary-color: #F7941D; /* 亮橙色 */
        --accent-color: #32CD32; /* 荧光绿 */
        --text-color: #333333;
        --background-gradient: linear-gradient(135deg, #032B44, #1E3A5F);
        --button-hover-scale: 1.05;
        --transition-duration: 0.3s;
        --container-padding: 20px;
        --font-family: 'Roboto', sans-serif;
    }

    body {
        margin: 0;
        font-family: var(--font-family);
        color: var(--text-color);
        background: var(--background-gradient);
        line-height: 1.6;
    }

    a {
        color: var(--secondary-color);
        text-decoration: none;
        transition: color var(--transition-duration);
    }

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

    header {
        background: rgba(3, 43, 68, 0.8);
        padding: 40px 20px;
        text-align: center;
        color: white;
        position: sticky;
        top: 0;
        z-index: 1000;
    }

    header h1 {
        margin: 0;
        font-size: 2.5em;
        font-weight: 700;
    }

    nav {
        margin-top: 20px;
    }

    nav a {
        margin: 0 15px;
        font-size: 1em;
        font-weight: 500;
    }

    .container {
        max-width: 1200px;
        margin: 0 auto;
        padding: var(--container-padding);
    }

    section {
        padding: 60px 20px;
    }

    .intro {
        text-align: center;
        color: white;
    }

    .intro h2 {
        font-size: 2em;
        margin-bottom: 20px;
    }

    .intro p {
        font-size: 1.2em;
        max-width: 800px;
        margin: 0 auto;
    }

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

    .feature-item {
        background: rgba(255, 255, 255, 0.1);
        padding: 20px;
        border-radius: 10px;
        box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
        transition: transform var(--transition-duration), background  var(--transition-duration);
    }

    .feature-item:hover {
        transform: translateY(-10px);
        background: rgba(255, 255, 255, 0.2);
    }

    .feature-item img {
        width: 100%;
        height: auto;
        border-radius: 8px;
    }

    .feature-item h3 {
        margin-top: 15px;
        font-size: 1.5em;
    }

    .feature-item p {
        margin-top: 10px;
        font-size: 1em;
    }

    .cta {
        text-align: center;
        margin: 40px 0;
    }

    .cta button {
        background-color: var(--secondary-color);
        color: white;
        border: none;
        padding: 15px 30px;
        font-size: 1.2em;
        border-radius: 50px;
        cursor: pointer;
        transition: transform var(--transition-duration), background-color var(--transition-duration);
    }

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

    .example-section {
        background: rgba(255, 255, 255, 0.05);
        padding: 40px 20px;
        border-radius: 10px;
        color: white;
    }

    .example-section h2 {
        text-align: center;
        margin-bottom: 30px;
        font-size: 2em;
    }

    .example-article {
        background: rgba(255, 255, 255, 0.1);
        padding: 20px;
        border-radius: 10px;
        overflow: auto;
    }

    .example-article h2, .example-article h3, .example-article h4 {
        color: var(--secondary-color);
    }

    .example-article pre {
        background: #1E3A5F;
        padding: 15px;
        border-radius: 5px;
        overflow-x: auto;
        color: #FFFFFF;
        font-family: 'Courier New', Courier, monospace;
        margin: 15px 0;
    }

    .example-article code {
        background: #1E3A5F;
        color: #FFFFFF;
        padding: 2px 4px;
        border-radius: 3px;
        font-family: 'Courier New', Courier, monospace;
    }

    footer {
        background: rgba(3, 43, 68, 0.9);
        color: white;
        text-align: center;
        padding: 20px;
    }

    footer p {
        margin: 0;
        font-size: 1em;
    }

    /* 动画效果 */
    @keyframes fadeInUp {
        from {
            opacity: 0;
            transform: translateY(20px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    @keyframes auroraMove {
        0% {
            background-position: 0% 50%;
        }
        50% {
            background-position: 100% 50%;
        }
        100% {
            background-position: 0% 50%;
        }
    }

    .animated {
        animation: fadeInUp 1s ease-out forwards;
    }

    /* 背景动画 */
    body::before {
        content: "";
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: radial-gradient(circle, rgba(255, 87, 34, 0.3), transparent);
        animation: auroraMove 15s linear infinite;
        z-index: -1;
    }

    /* 响应式设计 */
    @media (max-width: 768px) {
        header h1 {
            font-size: 2em;
        }

        .intro h2 {
            font-size: 1.8em;
        }

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

        .cta button {
            width: 80%;
            font-size: 1em;
        }
    }

    @media (max-width: 480px) {
        header h1 {
            font-size: 1.5em;
        }

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

        .feature-item h3 {
            font-size: 1.2em;
        }

        .feature-item p {
            font-size: 0.9em;
        }

        .cta button {
            width: 100%;
            font-size: 0.9em;
        }
    }