/* 全局样式 */
    * {
        box-sizing: border-box;
        margin: 0;
        padding: 0;
    }

    body {
        font-family: 'Roboto', sans-serif;
        background: radial-gradient(circle, rgb(0, 116, 217), transparent), 
                    linear-gradient(135deg, #8E44AD, #2C3E50);
        color: #ffffff;
        line-height: 1.6;
        overflow-x: hidden;
        animation: aurora-move 15s linear infinite;
    }

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

    /* 头部样式 */
    header {
        padding: 20px;
        text-align: center;
        background: rgba(0, 0, 0, 0.5);
        position: sticky;
        top: 0;
        z-index: 1000;
    }

    header h1 {
        font-size: 2.5em;
        font-weight: bold;
        color: #ffffff;
        text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
    }

    /* 导航菜单 */
    nav {
        margin-top: 10px;
    }

    nav ul {
        list-style: none;
        display: flex;
        justify-content: center;
        flex-wrap: wrap;
    }

    nav ul li {
        margin: 0 15px;
    }

    nav ul li a {
        color: #ffffff;
        text-decoration: none;
        font-size: 1.1em;
        transition: color 0.3s ease, transform 0.3s ease;
    }

    nav ul li a:hover {
        color: #8E44AD;
        transform: scale(1.1);
    }

    /* 主内容区 */
    .container {
        max-width: 1200px;
        margin: 40px auto;
        padding: 20px;
        background: rgba(255, 255, 255, 0.1);
        border-radius: 10px;
        box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
    }

    /* 项目展示区 */
    .projects {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 20px;
        margin-bottom: 40px;
    }

    .project-card {
        background: rgba(255, 255, 255, 0.2);
        border-radius: 10px;
        padding: 20px;
        position: relative;
        overflow: hidden;
        transition: transform 0.3s ease, box-shadow 0.3s ease;
    }

    .project-card:hover {
        transform: translateY(-10px);
        box-shadow: 0 12px 24px rgba(0,0,0,0.2);
    }

    .project-card img {
        width: 100%;
        height: auto;
        border-radius: 10px;
        margin-bottom: 15px;
    }

    .project-card h3 {
        font-size: 1.5em;
        margin-bottom: 10px;
        color: #FFD700;
    }

    .project-card p {
        font-size: 1em;
        margin-bottom: 10px;
    }

    .project-card .keywords {
        font-size: 0.9em;
        color: #B0C4DE;
    }

    /* 示例展示区 */
    .sample-article {
        background: rgba(0, 0, 0, 0.6);
        padding: 30px;
        border-radius: 10px;
        margin-bottom: 40px;
    }

    .sample-article h2 {
        font-size: 2em;
        margin-bottom: 20px;
        color: #FF69B4;
    }

    .sample-article h3, .sample-article h4 {
        color: #00FA9A;
        margin-top: 20px;
        margin-bottom: 10px;
    }

    .sample-article p {
        margin-bottom: 15px;
        text-align: justify;
    }

    .sample-article pre {
        background: #1e1e1e;
        padding: 15px;
        border-radius: 5px;
        overflow-x: auto;
        margin-bottom: 15px;
    }

    .sample-article code {
        color: #00FF7F;
        font-family: 'Courier New', Courier, monospace;
    }

    /* 代码块样式 */
    .code-block {
        background: #2d2d2d;
        padding: 20px;
        border-radius: 8px;
        overflow-x: auto;
        margin-bottom: 20px;
    }

    .code-block code {
        display: block;
        color: #00FF7F;
        font-family: 'Courier New', Courier, monospace;
        white-space: pre-wrap;
        word-wrap: break-word;
    }

    /* 底部备注 */
    .footer-note {
        text-align: center;
        font-size: 1.2em;
        color: #FFFFFF;
        margin-top: 20px;
        padding: 10px;
        background: rgba(0, 0, 0, 0.5);
        border-radius: 5px;
    }

    /* 响应式设计 */
    @media (max-width: 1440px) {
        header h1 {
            font-size: 2.2em;
        }

        nav ul li a {
            font-size: 1em;
        }
    }

    @media (max-width: 1200px) {
        .container {
            padding: 15px;
        }

        .project-card h3 {
            font-size: 1.4em;
        }
    }

    @media (max-width: 1024px) {
        .projects {
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
        }

        .sample-article h2 {
            font-size: 1.8em;
        }
    }

    @media (max-width: 768px) {
        header h1 {
            font-size: 1.8em;
        }

        nav ul {
            flex-direction: column;
        }

        nav ul li {
            margin: 10px 0;
        }

        .projects {
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        }

        .sample-article {
            padding: 20px;
        }
    }

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

        nav ul li a {
            font-size: 0.9em;
        }

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

        .sample-article h2 {
            font-size: 1.5em;
        }
    }

    @media (max-width: 320px) {
        header h1 {
            font-size: 1.2em;
        }

        .sample-article h2 {
            font-size: 1.2em;
        }
    }

    /* 图标与按钮 */
    .btn {
        display: inline-block;
        padding: 10px 20px;
        background: #8E44AD;
        color: #ffffff;
        text-decoration: none;
        border-radius: 5px;
        transition: background 0.3s ease, transform 0.3s ease;
    }

    .btn:hover {
        background: #FFD700;
        transform: scale(1.05);
    }

    /* 图片样式 */
    img {
        max-width: 100%;
        height: auto;
        border-radius: 5px;
    }

    /* 链接样式 */
    a {
        color: #1E90FF;
        text-decoration: none;
    }

    a:hover {
        text-decoration: underline;
    }

    /* 列表样式 */
    ul, ol {
        margin-left: 20px;
        margin-bottom: 15px;
    }

    li {
        margin-bottom: 10px;
    }

    /* 表格样式 */
    table {
        width: 100%;
        border-collapse: collapse;
        margin-bottom: 20px;
    }

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

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

    th {
        background: #8E44AD;
    }

    /* 表单样式（尽管不使用表单，但防止样式冲突） */
    input, textarea, select, button {
        font-family: inherit;
    }

    /* 图片遮罩效果 */
    .image-overlay {
        position: relative;
    }

    .image-overlay::after {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(46, 204, 113, 0.5);
        opacity: 0;
        transition: opacity 0.3s ease;
    }

    .image-overlay:hover::after {
        opacity: 1;
    }

    /* 卡片内文字 */
    .card-text {
        position: absolute;
        bottom: 15px;
        left: 15px;
        color: #ffffff;
        background: rgba(0, 0, 0, 0.6);
        padding: 10px;
        border-radius: 5px;
        max-width: 90%;
    }

    /* 图标悬停动画 */
    .icon {
        width: 30px;
        height: 30px;
        fill: #ffffff;
        transition: transform 0.3s ease, fill 0.3s ease;
    }

    .icon:hover {
        transform: rotate(20deg);
        fill: #FFD700;
    }