/* 全局样式 */
    :root {
        --primary-color: #4A90E2; /* 电光蓝 */
        --secondary-color: #7C4DFF; /* 紫色 */
        --accent-color: #FFB74D; /* 亮橙 */
        --background-gradient: linear-gradient(135deg, #4A90E2, #7C4DFF, #4A90E2);
        --text-color: #333333;
        --header-font: 'Roboto', sans-serif;
        --body-font: 'Roboto', sans-serif;
        --transition-speed: 0.3s;
    }

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

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

    header {
        text-align: center;
        padding: 40px 20px;
        background: rgba(255, 255, 255, 0.8);
        border-radius: 10px;
        margin-bottom: 30px;
    }

    header h1 {
        font-size: 2.5rem;
        color: var(--primary-color);
        margin-bottom: 10px;
    }

    header p {
        font-size: 1.2rem;
        color: #555555;
    }

    .container {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 20px;
    }

    .card {
        background: rgba(255, 255, 255, 0.9);
        padding: 20px;
        border-radius: 10px;
        box-shadow: 0 4px 6px rgba(0,0,0,0.1);
        transition: transform var(--transition-speed) ease-in-out, box-shadow var(--transition-speed) ease-in-out;
    }

    .card:hover {
        transform: translateY(-10px);
        box-shadow: 0 10px 15px rgba(0,0,0,0.2);
    }

    .card h3 {
        color: var(--secondary-color);
        margin-bottom: 15px;
    }

    .card p {
        font-size: 1rem;
        color: #666666;
    }

    .card img {
        width: 100%;
        height: auto;
        border-radius: 8px;
        margin-bottom: 15px;
    }

    .highlight {
        background: #f0f8ff;
        padding: 10px;
        border-left: 4px solid var(--accent-color);
        margin: 20px 0;
        overflow-x: auto;
    }

    pre {
        background: #2d2d2d;
        color: #f8f8f2;
        padding: 15px;
        border-radius: 8px;
        overflow-x: auto;
        font-size: 0.9rem;
    }

    code {
        font-family: 'Courier New', Courier, monospace;
        color: #f8f8f2;
    }

    .example-article {
        background: rgba(255, 255, 255, 0.95);
        padding: 30px;
        border-radius: 10px;
        margin-top: 40px;
        box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    }

    .example-article h2 {
        color: var(--primary-color);
        margin-bottom: 20px;
        text-align: center;
    }

    .example-article h3 {
        color: var(--secondary-color);
        margin-top: 25px;
        margin-bottom: 10px;
    }

    .example-article p {
        margin-bottom: 15px;
        color: #555555;
    }

    .example-article pre {
        background: #1e1e1e;
        color: #d4d4d4;
        padding: 15px;
        border-radius: 8px;
        overflow-x: auto;
        margin-bottom: 20px;
    }

    .footer {
        text-align: center;
        margin-top: 50px;
        color: #777777;
    }

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

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

    /* 按钮样式 */
    .button {
        background-color: var(--primary-color);
        color: white;
        border: none;
        padding: 10px 20px;
        cursor: pointer;
        border-radius: 5px;
        transition: transform var(--transition-speed) ease-in-out, background-color var(--transition-speed) ease-in-out;
    }

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

    /* 响应式设计 */
    @media (max-width: 1440px) {
        header h1 {
            font-size: 2.2rem;
        }
        .container {
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        }
    }

    @media (max-width: 1200px) {
        header h1 {
            font-size: 2rem;
        }
        .card {
            padding: 18px;
        }
    }

    @media (max-width: 1024px) {
        header h1 {
            font-size: 1.8rem;
        }
        .example-article {
            padding: 25px;
        }
    }

    @media (max-width: 768px) {
        header h1 {
            font-size: 1.6rem;
        }
        .container {
            grid-template-columns: 1fr;
        }
        .example-article {
            padding: 20px;
        }
    }

    @media (max-width: 480px) {
        header h1 {
            font-size: 1.4rem;
        }
        .card {
            padding: 15px;
        }
    }

    @media (max-width: 320px) {
        header h1 {
            font-size: 1.2rem;
        }
        .card {
            padding: 12px;
        }
    }

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

    .animated-background {
        background: radial-gradient(circle, rgb(255, 87, 34), transparent);
        animation: aurora-move 15s linear infinite;
    }

    /* 提示信息样式 */
    .notice {
        background: rgba(255, 255, 255, 0.85);
        border-left: 4px solid var(--accent-color);
        padding: 15px;
        margin: 30px 0;
        border-radius: 5px;
        color: #333333;
    }

    /* 图片样式 */
    .gallery {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
        margin-top: 20px;
    }

    .gallery img {
        width: 100px;
        height: 100px;
        object-fit: cover;
        border-radius: 5px;
    }