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

    body {
        font-family: 'Roboto', sans-serif;
        background: linear-gradient(135deg, #1e3c72, #2a5298);
        color: #ffffff;
        line-height: 1.6;
        padding: 20px;
    }

    h1, h2, h3, h4 {
        color: #28a745;
        margin-bottom: 15px;
    }

    p {
        margin-bottom: 15px;
        color: #f0f0f0;
    }

    a {
        color: #ffd700;
        text-decoration: none;
        transition: color 0.3s ease;
    }

    a:hover {
        color: #32cd32;
    }

    pre {
        background: rgba(255, 255, 255, 0.1);
        padding: 15px;
        border-radius: 8px;
        overflow-x: auto;
        margin-bottom: 20px;
    }

    code {
        font-family: 'Courier New', Courier, monospace;
        color: #00ff7f;
    }

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

    th, td {
        border: 1px solid #28a745;
        padding: 10px;
        text-align: left;
    }

    th {
        background: #2a5298;
    }

    ul {
        list-style: disc inside;
        margin-bottom: 20px;
    }

    li {
        margin-bottom: 10px;
    }

    .grid-container {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 20px;
        margin-bottom: 40px;
    }

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

    .card:hover {
        transform: translateY(-10px);
        background: rgba(255, 255, 255, 0.3);
    }

    .card h4 {
        margin-bottom: 10px;
        color: #ffd700;
    }

    .card p {
        color: #e0e0e0;
    }

    .fade-in {
        opacity: 0;
        transform: translateY(20px);
        transition: all 0.5s ease;
    }

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

    /* 按钮样式 */
    .button-primary {
        background-color: #28a745;
        color: #ffffff;
        padding: 10px 20px;
        border: none;
        border-radius: 5px;
        cursor: pointer;
        transition: transform 0.3s ease, background-color 0.3s ease;
    }

    .button-primary:hover {
        transform: scale(1.05);
        background-color: #218838;
    }

    /* 导航栏样式 */
    .navbar {
        position: fixed;
        top: 0;
        width: 100%;
        background: rgba(30, 60, 114, 0.9);
        padding: 15px 20px;
        z-index: 1000;
        display: flex;
        justify-content: space-between;
        align-items: center;
    }

    .navbar a {
        margin-left: 15px;
        color: #ffffff;
    }

    /* 主内容样式 */
    .container {
        max-width: 1200px;
        margin: 100px auto 50px auto;
        padding: 20px;
        background: rgba(0, 0, 0, 0.5);
        border-radius: 10px;
    }

    /* 响应式设计 */
    @media (max-width: 1440px) {
        .container {
            max-width: 1100px;
        }
    }

    @media (max-width: 1200px) {
        .grid-container {
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        }
    }

    @media (max-width: 1024px) {
        .navbar {
            flex-direction: column;
            align-items: flex-start;
        }
    }

    @media (max-width: 768px) {
        body {
            padding: 10px;
        }

        .card {
            padding: 15px;
        }
    }

    @media (max-width: 480px) {
        h1 {
            font-size: 24px;
        }

        h2 {
            font-size: 20px;
        }

        .button-primary {
            width: 100%;
            text-align: center;
        }
    }

    @media (max-width: 320px) {
        h1 {
            font-size: 20px;
        }

        .navbar a {
            margin-left: 10px;
            font-size: 14px;
        }
    }

    /* 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;
    }

    /* 表格响应式 */
    @media (max-width: 768px) {
        table, thead, tbody, th, td, tr {
            display: block;
        }

        th {
            position: absolute;
            top: -9999px;
            left: -9999px;
        }

        td {
            border: none;
            position: relative;
            padding-left: 50%;
            white-space: normal;
            text-align: left;
        }

        td:before {
            position: absolute;
            top: 10px;
            left: 10px;
            width: 45%;
            padding-right: 10px;
            white-space: nowrap;
            font-weight: bold;
        }
    }