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

    body {
        background: radial-gradient(circle, rgba(0, 74, 173, 0.8), rgba(10, 104, 74, 0.8)), url('https://images.gptkong.com/demo/sample11.png') no-repeat center center/cover;
        font-family: 'Inter', sans-serif;
        color: #ffffff;
        line-height: 1.6;
        padding: 20px;
        animation: aurora-move 15s linear infinite;
    }

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

    h1, h2, h3, h4 {
        font-family: 'Roboto', sans-serif;
        font-weight: bold;
        margin-bottom: 15px;
    }

    h1 {
        font-size: 2.5em;
        text-align: center;
        margin-bottom: 30px;
        background: linear-gradient(135deg, #bb12ff, #ff8e00);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
    }

    h2 {
        font-size: 2em;
        margin-top: 30px;
    }

    h3 {
        font-size: 1.5em;
        margin-top: 25px;
    }

    h4 {
        font-size: 1.2em;
        margin-top: 20px;
    }

    p {
        margin-bottom: 20px;
        text-align: justify;
    }

    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;
        background: rgba(0, 0, 0, 0.5);
        padding: 2px 4px;
        border-radius: 4px;
    }

    .card {
        background-color: rgba(255, 255, 255, 0.2);
        border-radius: 15px;
        box-shadow: 0 8px 16px rgba(0, 0, 0, 0.3);
        padding: 30px;
        margin: 20px 0;
        backdrop-filter: blur(10px);
        transition: transform 0.3s ease;
    }

    .card:hover {
        transform: scale(1.05);
    }

    .button {
        position: relative;
        display: inline-block;
        padding: 10px 20px;
        background: rgba(255, 140, 0, 0.7);
        color: #ffffff;
        border: none;
        border-radius: 25px;
        cursor: pointer;
        overflow: hidden;
        transition: background 0.3s ease;
    }

    .button::before {
        content: '';
        position: absolute;
        top: 50%;
        left: 50%;
        width: 0;
        height: 0;
        background: rgba(255, 255, 255, 0.5);
        border-radius: 50%;
        transform: translate(-50%, -50%);
        opacity: 0;
        transition: all 0.3s ease;
    }

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

    .navbar {
        display: flex;
        justify-content: center;
        gap: 20px;
        margin-bottom: 30px;
        background: linear-gradient(135deg, #8e2de2, #4a00e0);
        padding: 15px;
        border-radius: 10px;
    }

    .navbar a {
        color: #ffffff;
        text-decoration: none;
        position: relative;
        padding: 5px 10px;
        transition: color 0.3s ease;
    }

    .navbar a:hover {
        color: #ff8e00;
    }

    .chart-bar {
        background: linear-gradient(to right, #00C4FF, #33E86B);
        height: 25px;
        border-radius: 5px;
        animation: grow 1s ease-in-out forwards;
    }

    @keyframes grow {
        from { width: 0; }
        to { width: 100%; }
    }

    .background {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: url('https://images.gptkong.com/demo/sample12.png') no-repeat center center/cover;
        filter: blur(8px);
        opacity: 0.5;
        z-index: -1;
    }

    .responsive-img {
        width: 100%;
        max-width: 320px;
        height: auto;
        border-radius: 10px;
        margin: 10px;
    }

    .code-snippet {
        background: rgba(0, 0, 0, 0.6);
        padding: 20px;
        border-radius: 10px;
        overflow-x: auto;
        margin-bottom: 20px;
    }

    .footer {
        text-align: center;
        margin-top: 40px;
        font-size: 0.9em;
        color: #cccccc;
    }

    /* 响应式设计 */
    @media (max-width: 320px) {
        body {
            padding: 10px;
        }
        h1 {
            font-size: 1.8em;
        }
        .navbar {
            flex-direction: column;
            gap: 10px;
        }
    }

    @media (max-width: 480px) {
        h1 {
            font-size: 2em;
        }
        .card {
            padding: 20px;
        }
    }

    @media (max-width: 768px) {
        .navbar {
            flex-wrap: wrap;
        }
        .responsive-img {
            max-width: 100%;
        }
    }

    @media (max-width: 1024px) {
        h1 {
            font-size: 2.2em;
        }
        .button {
            padding: 8px 16px;
        }
    }

    @media (min-width: 1200px) {
        body {
            padding: 40px;
        }
        h1 {
            font-size: 3em;
        }
        .card {
            padding: 40px;
        }
    }

    @media (min-width: 1440px) {
        .navbar {
            gap: 30px;
        }
    }