/* 全局样式 */
    body {
        margin: 0;
        padding: 0;
        font-family: 'Roboto', sans-serif;
        background: linear-gradient(135deg, #0f2027, #203a43, #2c5364);
        color: #ffffff;
        line-height: 1.6;
    }

    a {
        color: #00d2ff;
        text-decoration: none;
        transition: color 0.3s ease;
    }

    a:hover {
        color: #ff4081;
    }

    /* 导航栏 */
    header {
        position: fixed;
        top: 0;
        width: 100%;
        background: rgba(20, 24, 82, 0.9);
        padding: 15px 30px;
        z-index: 1000;
        box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    }

    nav {
        display: flex;
        justify-content: flex-end;
    }

    nav a {
        margin-left: 20px;
        font-size: 16px;
        font-weight: 500;
    }

    /* 主内容区 */
    main {
        padding-top: 80px;
    }

    section {
        padding: 60px 20px;
        min-height: 100vh;
        display: flex;
        align-items: center;
        justify-content: center;
        flex-direction: column;
        text-align: center;
    }

    .section-content {
        max-width: 1200px;
        width: 100%;
        padding: 20px;
    }

    h1, h2, h3, h4 {
        font-family: 'Roboto', sans-serif;
        color: #00d2ff;
        margin-bottom: 20px;
    }

    h1 {
        font-size: 48px;
    }

    h2 {
        font-size: 36px;
    }

    h3 {
        font-size: 28px;
    }

    h4 {
        font-size: 22px;
    }

    p {
        font-size: 18px;
        color: #ffffff;
        margin-bottom: 20px;
    }

    ul {
        list-style: none;
        padding: 0;
    }

    ul li {
        text-align: left;
        margin-bottom: 10px;
        position: relative;
        padding-left: 20px;
    }

    ul li::before {
        content: '•';
        color: #00d2ff;
        position: absolute;
        left: 0;
        top: 0;
    }

    pre {
        background: #1e2a38;
        padding: 15px;
        border-radius: 8px;
        overflow-x: auto;
        margin-bottom: 20px;
    }

    code {
        color: #00d2ff;
        font-family: 'Courier New', Courier, monospace;
        font-size: 16px;
    }

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

    table, th, td {
        border: 1px solid #00d2ff;
    }

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

    th {
        background: #203a43;
    }

    /* 网格布局 */
    .grid-container {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 20px;
    }

    .grid-item {
        background: #2c5364;
        padding: 20px;
        border-radius: 8px;
        transition: transform 0.3s ease, background 0.3s ease;
    }

    .grid-item:hover {
        transform: translateY(-10px);
        background: #00d2ff;
        color: #000000;
    }

    .grid-item img {
        width: 100%;
        height: auto;
        border-radius: 4px;
        margin-bottom: 15px;
    }

    /* 动画效果 */
    .fade-in {
        opacity: 0;
        transform: translateY(20px);
        transition: all 0.6s ease-out;
    }

    .fade-in.active {
        opacity: 1;
        transform: translateY(0);
    }

    /* 响应式设计 */
    @media (max-width: 1440px) {
        h1 {
            font-size: 42px;
        }
        h2 {
            font-size: 32px;
        }
        h3 {
            font-size: 24px;
        }
        h4 {
            font-size: 20px;
        }
        p {
            font-size: 16px;
        }
    }

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

    @media (max-width: 1024px) {
        nav a {
            margin-left: 15px;
            font-size: 15px;
        }
    }

    @media (max-width: 768px) {
        h1 {
            font-size: 36px;
        }
        h2 {
            font-size: 28px;
        }
        h3 {
            font-size: 22px;
        }
        h4 {
            font-size: 18px;
        }
        p {
            font-size: 14px;
        }
        .grid-container {
            grid-template-columns: 1fr;
        }
    }

    @media (max-width: 480px) {
        header {
            padding: 10px 20px;
        }
        nav a {
            margin-left: 10px;
            font-size: 14px;
        }
        h1 {
            font-size: 28px;
        }
        h2 {
            font-size: 24px;
        }
        h3 {
            font-size: 20px;
        }
        h4 {
            font-size: 16px;
        }
        p {
            font-size: 12px;
        }
    }

    @media (max-width: 320px) {
        h1 {
            font-size: 24px;
        }
        h2 {
            font-size: 20px;
        }
        h3 {
            font-size: 18px;
        }
        h4 {
            font-size: 14px;
        }
        p {
            font-size: 10px;
        }
    }

    /* 图片样式 */
    .decorative-img {
        width: 320px;
        height: 320px;
        object-fit: cover;
        border-radius: 8px;
        margin: 10px;
    }

    /* 提示信息 */
    .reference-note {
        background: rgba(0, 210, 255, 0.1);
        padding: 15px;
        border-left: 5px solid #00d2ff;
        margin: 20px 0;
        border-radius: 4px;
    }

    /* 代码块样式 */
    .code-block {
        background: #1e2a38;
        padding: 20px;
        border-radius: 8px;
        overflow-x: auto;
        margin-bottom: 20px;
    }

    /* 表格样式 */
    table {
        background: #2c5364;
    }

    th, td {
        border: 1px solid #00d2ff;
        padding: 10px;
    }

    th {
        background: #203a43;
    }