/* 基础样式 */
    body {
        margin: 0;
        font-family: 'Roboto', sans-serif;
        background: linear-gradient(135deg, #0f2027, #203a43, #2c5364);
        color: #ffffff;
        overflow-x: hidden;
    }

    a {
        color: #00ff99;
        text-decoration: none;
        rel: nofollow;
    }

    a:hover {
        color: #ff5733;
    }

    header {
        position: fixed;
        top: 0;
        width: 100%;
        background: rgba(32, 58, 67, 0.9);
        padding: 20px 0;
        z-index: 1000;
        transition: all 0.3s ease;
    }

    header.shrink {
        padding: 10px 0;
        background: rgba(32, 58, 67, 0.8);
    }

    .container {
        max-width: 1200px;
        margin: 100px auto 50px;
        padding: 0 20px;
    }

    h1, h2, h3, h4 {
        font-family: 'Orbitron', sans-serif;
        color: #00ff99;
        text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
    }

    h1.title {
        font-size: 48px;
        letter-spacing: 4px;
        margin-bottom: 20px;
    }

    h2 {
        font-size: 36px;
        margin-top: 40px;
        margin-bottom: 20px;
    }

    h3 {
        font-size: 28px;
        margin-top: 30px;
        margin-bottom: 15px;
    }

    p {
        line-height: 1.6;
        margin-bottom: 20px;
    }

    pre {
        background: rgba(255, 255, 255, 0.1);
        padding: 15px;
        border-radius: 10px;
        overflow-x: auto;
        margin-bottom: 20px;
    }

    code {
        font-family: 'Courier New', Courier, monospace;
        color: #ffcc00;
    }

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

    table, th, td {
        border: 1px solid #00ff99;
    }

    th, td {
        padding: 10px;
        text-align: left;
    }

    .card {
        background: rgba(255, 255, 255, 0.1);
        border-radius: 15px;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
        padding: 20px;
        margin: 15px;
        transition: transform 0.3s ease-in-out, box-shadow 0.3s ease-in-out;
    }

    .card:hover {
        transform: scale(1.05);
        box-shadow: 0 15px 35px rgba(0, 0, 0, 0.3);
    }

    .image-gallery {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
        justify-content: center;
        margin-bottom: 30px;
    }

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

    .footer {
        background: rgba(32, 58, 67, 0.9);
        padding: 20px 0;
        text-align: center;
        color: #cccccc;
    }

    /* 视觉冲击效果 */
    .background {
        background: linear-gradient(135deg, #000046, #1cb5e0);
        height: 100vh;
        display: flex;
        align-items: center;
        justify-content: center;
        position: relative;
    }

    .background::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: url('https://images.gptkong.com/demo/sample1.png') center center / cover no-repeat;
        opacity: 0.3;
    }

    /* 响应式设计 */
    @media (max-width: 1440px) {
        .container {
            max-width: 1024px;
        }
    }

    @media (max-width: 1200px) {
        .container {
            max-width: 768px;
        }
    }

    @media (max-width: 1024px) {
        header {
            padding: 15px 0;
        }

        h1.title {
            font-size: 40px;
        }

        h2 {
            font-size: 32px;
        }

        h3 {
            font-size: 24px;
        }
    }

    @media (max-width: 768px) {
        .image-gallery {
            flex-direction: column;
            align-items: center;
        }

        header {
            padding: 10px 0;
        }

        h1.title {
            font-size: 32px;
        }

        h2 {
            font-size: 28px;
        }

        h3 {
            font-size: 20px;
        }
    }

    @media (max-width: 480px) {
        .container {
            margin: 80px auto 30px;
        }

        h1.title {
            font-size: 28px;
            letter-spacing: 2px;
        }

        h2 {
            font-size: 24px;
        }

        h3 {
            font-size: 18px;
        }
    }

    @media (max-width: 320px) {
        .container {
            margin: 60px auto 20px;
        }

        h1.title {
            font-size: 24px;
        }

        h2 {
            font-size: 20px;
        }

        h3 {
            font-size: 16px;
        }
    }

    /* 滚动效果 */
    .fade-in {
        opacity: 0;
        transform: translateY(20px);
        transition: opacity 0.6s ease-out, transform 0.6s ease-out;
    }

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

    /* 按钮样式 */
    .button {
        background-color: #00ff99;
        color: #fff;
        border: none;
        padding: 10px 20px;
        font-size: 16px;
        cursor: pointer;
        transition: background-color 0.3s ease, transform 0.3s ease;
        border-radius: 5px;
    }

    .button:hover {
        background-color: #00cc66;
        transform: scale(1.05);
    }

    /* 动态粒子背景 */
    .particle-background {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        pointer-events: none;
        z-index: -1;
    }