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

    body {
        font-family: 'Roboto', sans-serif;
        background: linear-gradient(135deg, #1e1e1e, #121212);
        color: #ffffff;
        line-height: 1.6;
        padding: 20px;
    }

    a {
        color: #00ff99;
        text-decoration: none;
        transition: color 0.3s ease;
    }

    a:hover {
        color: #00cc7a;
    }

    .container {
        max-width: 1200px;
        margin: 0 auto;
        padding: 20px;
    }

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

    h1 {
        font-size: 48px;
        letter-spacing: 2px;
        text-align: center;
        margin-bottom: 40px;
        color: #00ff99;
        text-shadow: 0 0 10px #00ff99;
    }

    h2 {
        font-size: 36px;
        margin-top: 40px;
        color: #ff66cc;
    }

    h3 {
        font-size: 28px;
        margin-top: 30px;
        color: #66ccff;
    }

    h4 {
        font-size: 24px;
        margin-top: 25px;
        color: #ffcc66;
    }

    p {
        margin-bottom: 20px;
        font-size: 16px;
        color: #dddddd;
    }

    b {
        color: #ff6666;
    }

    i {
        color: #66ffcc;
    }

    pre {
        background: #1e1e1e;
        padding: 15px;
        border-radius: 8px;
        overflow: auto;
        margin-bottom: 20px;
    }

    code {
        color: #00ff99;
        font-family: 'Courier New', Courier, monospace;
    }

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

    th, td {
        border: 1px solid #333333;
        padding: 12px;
        text-align: left;
        color: #ffffff;
    }

    th {
        background: #333333;
    }

    .card {
        background-color: #1e1e1e;
        border-radius: 10px;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.5);
        padding: 20px;
        margin: 15px;
        transition: transform 0.3s ease, box-shadow 0.3s ease;
    }

    .card:hover {
        transform: translateY(-10px);
        box-shadow: 0 8px 12px rgba(0, 0, 0, 0.7);
    }

    .button {
        position: relative;
        overflow: hidden;
        padding: 10px 20px;
        background-color: #00ff99;
        color: #1e1e1e;
        border: none;
        border-radius: 5px;
        cursor: pointer;
        transition: transform 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;
    }

    .background-layer {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: url('https://images.gptkong.com/demo/sample5.png') no-repeat center center;
        background-size: cover;
        opacity: 0.7;
        z-index: -1;
    }

    .images-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: 15px;
        margin: 30px 0;
    }

    .images-grid img {
        width: 100%;
        border-radius: 8px;
        transition: transform 0.3s ease;
    }

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

    .notice {
        background: #333333;
        padding: 15px;
        border-radius: 5px;
        text-align: center;
        margin-bottom: 30px;
        color: #ffcc00;
        font-size: 18px;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.5);
    }

    /* 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;
        }
    }

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

    @media (max-width: 1024px) {
        .images-grid {
            grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
        }
    }

    @media (max-width: 768px) {
        h1 {
            font-size: 36px;
        }
        h2 {
            font-size: 28px;
        }
        h3 {
            font-size: 22px;
        }
        h4 {
            font-size: 18px;
        }
        .images-grid {
            grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
        }
    }

    @media (max-width: 480px) {
        h1 {
            font-size: 28px;
        }
        h2 {
            font-size: 24px;
        }
        h3 {
            font-size: 20px;
        }
        h4 {
            font-size: 16px;
        }
        .button {
            padding: 8px 16px;
        }
    }

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