/* 基本样式设置 */
    @import url('https://fonts.googleapis.com/css2?family=Open+Sans:wght@300&family=Roboto:wght@700&display=swap');

    :root {
        --primary-color: #003f87; /* 深蓝色 */
        --accent-color: #ff9900; /* 亮橙色 */
        --background-gradient: radial-gradient(circle, rgba(0, 63, 135, 0.8), transparent);
        --text-color: #333333;
        --heading-color: #ffffff;
        --card-background: #ffffff;
        --button-background: var(--accent-color);
        --button-text: #ffffff;
    }

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

    body {
        font-family: 'Open Sans', sans-serif;
        color: var(--text-color);
        background: var(--background-gradient);
        animation: backgroundMove 15s linear infinite;
        line-height: 1.6;
        padding: 20px;
    }

    header {
        background-color: var(--primary-color);
        color: var(--heading-color);
        padding: 20px;
        text-align: center;
        position: sticky;
        top: 0;
        z-index: 1000;
    }

    header h1 {
        font-family: 'Roboto', sans-serif;
        font-size: 2.5em;
    }

    nav {
        margin-top: 10px;
    }

    nav a {
        color: var(--heading-color);
        text-decoration: none;
        margin: 0 15px;
        font-weight: bold;
    }

    nav a:hover {
        text-decoration: underline;
    }

    .hero {
        display: flex;
        justify-content: center;
        align-items: center;
        height: 60vh;
        background-image: url('https://images.gptkong.com/demo/sample1.png');
        background-size: cover;
        background-position: center;
        position: relative;
    }

    .hero::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0, 63, 135, 0.5);
    }

    .hero h2 {
        position: relative;
        color: #ffffff;
        font-family: 'Roboto', sans-serif;
        font-size: 3em;
        z-index: 1;
        text-align: center;
    }

    .content {
        max-width: 1200px;
        margin: 40px auto;
        padding: 20px;
        background-color: rgba(255, 255, 255, 0.9);
        border-radius: 10px;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    }

    .section {
        margin-bottom: 40px;
    }

    .section h3 {
        font-family: 'Roboto', sans-serif;
        color: var(--primary-color);
        margin-bottom: 20px;
    }

    .section p {
        margin-bottom: 20px;
    }

    pre {
        background-color: #f4f4f4;
        padding: 15px;
        border-radius: 5px;
        overflow-x: auto;
    }

    code {
        font-family: 'Courier New', Courier, monospace;
        color: #d63384;
    }

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

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

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

    th {
        background-color: var(--primary-color);
        color: #ffffff;
    }

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

    .card {
        background-color: var(--card-background);
        padding: 20px;
        border-radius: 8px;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        transition: transform 0.3s ease, box-shadow 0.3s ease;
    }

    .card:hover {
        transform: scale(1.05);
        box-shadow: 0 8px 12px rgba(0, 0, 0, 0.2);
    }

    .card img {
        width: 100%;
        border-radius: 5px;
        margin-bottom: 15px;
    }

    .button {
        display: inline-block;
        padding: 10px 20px;
        background-color: var(--button-background);
        color: var(--button-text);
        text-decoration: none;
        border-radius: 5px;
        transition: background-color 0.3s ease, transform 0.3s ease;
        position: relative;
        overflow: hidden;
    }

    .button::before {
        content: '';
        position: absolute;
        top: 50%;
        left: 50%;
        width: 0;
        height: 0;
        background: rgba(255, 255, 255, 0.3);
        border-radius: 50%;
        transform: translate(-50%, -50%);
        transition: width 0.3s ease, height 0.3s ease, opacity 0.3s ease;
        opacity: 0;
    }

    .button:hover::before {
        width: 200px;
        height: 200px;
        opacity: 1;
    }

    .button:hover {
        background-color: darken(var(--button-background), 10%);
        transform: scale(1.05);
    }

    footer {
        background-color: var(--primary-color);
        color: #ffffff;
        text-align: center;
        padding: 20px;
        margin-top: 40px;
    }

    @keyframes backgroundMove {
        0% { background-position: 0% 50%; }
        50% { background-position: 100% 50%; }
        100% { background-position: 0% 50%; }
    }

    /* 响应式设计 */

    @media (max-width: 1440px) {
        .hero h2 {
            font-size: 2.5em;
        }
    }

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

    @media (max-width: 1024px) {
        nav a {
            margin: 0 10px;
        }

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

        .hero h2 {
            font-size: 2em;
        }
    }

    @media (max-width: 768px) {
        header h1 {
            font-size: 2em;
        }

        .hero {
            height: 40vh;
        }

        .hero h2 {
            font-size: 1.5em;
        }

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

    @media (max-width: 480px) {
        nav a {
            display: block;
            margin: 10px 0;
        }

        .hero {
            height: 30vh;
        }

        .content {
            padding: 10px;
        }

        table, th, td {
            font-size: 0.9em;
        }
    }

    @media (max-width: 320px) {
        header h1 {
            font-size: 1.5em;
        }

        .hero h2 {
            font-size: 1.2em;
        }

        .button {
            padding: 8px 16px;
            font-size: 0.9em;
        }
    }