/* 全局样式设置 */
    :root {
        --main-color: #0A2463; /* 深蓝色 */
        --accent-color: #FF9F1C; /* 亮橙色 */
        --neutral-color: #F5F5F5; /* 浅灰色 */
        --font-family: 'Roboto', sans-serif;
        --transition-speed: 0.3s;
    }

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

    body {
        font-family: var(--font-family);
        background: radial-gradient(circle, var(--main-color), transparent);
        color: var(--main-color);
        line-height: 1.6;
        overflow-x: hidden;
    }

    a {
        color: var(--accent-color);
        text-decoration: none;
        transition: color var(--transition-speed) ease;
        rel: nofollow;
    }

    a:hover {
        color: darken(var(--accent-color), 10%);
    }

    header {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        background: rgba(255, 255, 255, 0.9);
        box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
        z-index: 1000;
    }

    nav ul {
        list-style: none;
        display: flex;
        justify-content: center;
        padding: 15px 0;
    }

    nav ul li {
        margin: 0 20px;
    }

    .container {
        padding: 100px 20px 50px 20px;
        max-width: 1200px;
        margin: 0 auto;
    }

    h1, h2, h3, h4 {
        color: var(--main-color);
        margin-bottom: 20px;
    }

    h1 {
        font-size: 3rem;
        text-align: center;
        margin-top: 60px;
    }

    h2 {
        font-size: 2.5rem;
        margin-top: 40px;
        text-align: center;
    }

    h3 {
        font-size: 2rem;
        margin-top: 30px;
    }

    p {
        font-size: 1rem;
        margin-bottom: 20px;
        text-align: justify;
    }

    pre {
        background: #272822;
        color: #F8F8F2;
        padding: 15px;
        border-radius: 5px;
        overflow-x: auto;
        margin-bottom: 20px;
    }

    code {
        font-family: 'Courier New', Courier, monospace;
        font-size: 0.9rem;
    }

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

    table, th, td {
        border: 1px solid #ddd;
    }

    th, td {
        padding: 12px;
        text-align: left;
    }

    th {
        background-color: var(--main-color);
        color: white;
    }

    button {
        background-color: var(--accent-color);
        color: white;
        border: none;
        padding: 10px 20px;
        border-radius: 5px;
        cursor: pointer;
        transition: all var(--transition-speed) ease;
    }

    button:hover {
        transform: scale(1.1);
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
        background-color: darken(var(--accent-color), 10%);
    }

    .loader {
        border: 16px solid #f3f3f3;
        border-top: 16px solid var(--accent-color);
        border-radius: 50%;
        width: 120px;
        height: 120px;
        animation: spin 2s linear infinite;
        margin: 0 auto 20px auto;
    }

    @keyframes spin {
        0% { transform: rotate(0deg); }
        100% { transform: rotate(360deg); }
    }

    section {
        min-height: 100vh;
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        padding: 60px 20px;
        background: linear-gradient(135deg, #f0f4f8, var(--neutral-color));
    }

    .example-display {
        background: white;
        padding: 40px;
        border-radius: 10px;
        box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    }

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

    .images-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: 15px;
        margin-bottom: 30px;
    }

    .images-grid img {
        width: 100%;
        border-radius: 5px;
    }

    footer {
        background: var(--main-color);
        color: white;
        text-align: center;
        padding: 20px 0;
    }

    /* 响应式设计 */
    @media (max-width: 1440px) {
        h1 {
            font-size: 2.5rem;
        }
        h2 {
            font-size: 2rem;
        }
    }

    @media (max-width: 1200px) {
        .container {
            padding: 80px 20px 40px 20px;
        }
    }

    @media (max-width: 1024px) {
        h1 {
            font-size: 2.2rem;
        }
        nav ul li {
            margin: 0 15px;
        }
    }

    @media (max-width: 768px) {
        h1 {
            font-size: 2rem;
        }
        h2 {
            font-size: 1.8rem;
        }
        nav ul {
            flex-direction: column;
            align-items: center;
        }
        nav ul li {
            margin: 10px 0;
        }
    }

    @media (max-width: 480px) {
        h1 {
            font-size: 1.8rem;
        }
        h2 {
            font-size: 1.5rem;
        }
        button {
            padding: 8px 16px;
        }
    }

    @media (max-width: 320px) {
        h1 {
            font-size: 1.5rem;
        }
        h2 {
            font-size: 1.2rem;
        }
    }

    /* 动画效果 */
    @keyframes aurora-move {
        0% { background-position: 0% 50%; }
        50% { background-position: 100% 50%; }
        100% { background-position: 0% 50%; }
    }

    body {
        animation: aurora-move 15s linear infinite;
        background-size: 400% 400%;
    }