/* 基础样式 */
    * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
    }

    body {
        background: linear-gradient(to bottom, #001f3f, #000000);
        color: #ffffff;
        font-family: 'Roboto', sans-serif;
        line-height: 1.6;
        min-height: 100vh;
        display: flex;
        flex-direction: column;
    }

    /* 标题样式 */
    h1, h2, h3, h4, h5, h6 {
        font-family: 'Montserrat', sans-serif;
        margin-bottom: 1rem;
    }

    h1 {
        font-size: 2.5rem;
        text-align: center;
        margin-top: 2rem;
        color: #00ffff;
    }

    h2 {
        font-size: 2rem;
        color: #00ffff;
        margin-top: 1.5rem;
    }

    h3 {
        font-size: 1.75rem;
        color: #00ffff;
        margin-top: 1.2rem;
    }

    h4 {
        font-size: 1.5rem;
        color: #00ffff;
        margin-top: 1rem;
    }

    /* 容器样式 */
    .container {
        width: 90%;
        max-width: 1200px;
        margin: auto;
        padding: 2rem 0;
        display: grid;
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    /* 导航栏样式 */
    nav {
        background: rgba(0, 31, 63, 0.8);
        padding: 1rem 0;
        position: sticky;
        top: 0;
        z-index: 1000;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
    }

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

    nav ul li {
        margin: 0 1.5rem;
    }

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

    nav ul li a:hover {
        color: #00ffff;
    }

    /* 主要内容样式 */
    main {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 2rem;
    }

    /* 卡片样式 */
    .card {
        background: rgba(52, 58, 64, 0.8);
        border: 1px solid #666666;
        border-radius: 10px;
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
        padding: 1.5rem;
        backdrop-filter: blur(10px);
        transition: transform 0.3s ease, box-shadow 0.3s ease;
    }

    .card:hover {
        transform: translateY(-10px);
        box-shadow: 0 8px 16px rgba(0, 0, 0, 0.4);
    }

    /* 按钮样式 */
    .btn {
        background-color: #007bff;
        color: #ffffff;
        border: none;
        padding: 10px 20px;
        border-radius: 5px;
        cursor: pointer;
        transition: transform 0.2s ease, background-color 0.2s ease;
        font-size: 1rem;
    }

    .btn:hover {
        transform: scale(1.1);
        background-color: #0056b3;
    }

    /* 图片样式 */
    .image-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
        gap: 1rem;
    }

    .image-grid img {
        width: 100%;
        height: auto;
        border-radius: 5px;
        box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
        transition: transform 0.3s ease;
    }

    .image-grid img:hover {
        transform: scale(1.05);
    }

    /* 代码块样式 */
    pre {
        background: #2d2d2d;
        padding: 1rem;
        border-radius: 5px;
        overflow-x: auto;
        font-family: 'Courier New', Courier, monospace;
        color: #f8f8f2;
    }

    code {
        color: #f8f8f2;
    }

    /* 表格样式 */
    table {
        width: 100%;
        border-collapse: collapse;
        margin: 1rem 0;
    }

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

    th, td {
        padding: 0.75rem;
        text-align: left;
    }

    th {
        background-color: #001f3f;
    }

    /* 动画 */
    @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;
        height: 200px;
        border-radius: 10px;
        margin-bottom: 2rem;
    }

    /* 响应式设计 */
    @media (max-width: 1440px) {
        h1 {
            font-size: 2.2rem;
        }
        h2 {
            font-size: 1.75rem;
        }
    }

    @media (max-width: 1200px) {
        .container {
            width: 95%;
        }
    }

    @media (max-width: 1024px) {
        nav ul {
            flex-direction: column;
            align-items: center;
        }
        nav ul li {
            margin: 0.5rem 0;
        }
    }

    @media (max-width: 768px) {
        h1 {
            font-size: 2rem;
        }
        .image-grid {
            grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
        }
    }

    @media (max-width: 480px) {
        h1 {
            font-size: 1.8rem;
        }
        h2 {
            font-size: 1.5rem;
        }
        .btn {
            padding: 8px 16px;
            font-size: 0.9rem;
        }
    }

    @media (max-width: 320px) {
        h1 {
            font-size: 1.5rem;
        }
        h2 {
            font-size: 1.2rem;
        }
        .card {
            padding: 1rem;
        }
    }

    /* 链接样式 */
    a {
        color: #00ffff;
        text-decoration: none;
        transition: color 0.3s ease;
    }

    a:hover {
        color: #ff5722;
    }

    /* 页脚样式 */
    footer {
        background: rgba(0, 31, 63, 0.9);
        color: #ffffff;
        text-align: center;
        padding: 1.5rem 0;
        margin-top: auto;
    }

    footer p {
        font-size: 0.9rem;
    }

    /* 提示信息样式 */
    .reference-note {
        background: rgba(52, 58, 64, 0.8);
        padding: 1rem;
        border-left: 5px solid #00ffff;
        margin: 2rem 0;
        border-radius: 5px;
    }

    /* 表单元素禁用样式 */
    input, textarea, select {
        background: rgba(52, 58, 64, 0.8);
        border: 1px solid #666666;
        color: #ffffff;
        padding: 0.5rem;
        border-radius: 5px;
        width: 100%;
    }

    input:disabled, textarea:disabled, select:disabled {
        background: rgba(52, 58, 64, 0.5);
        cursor: not-allowed;
    }