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

    body, html {
        height: 100%;
        font-family: 'Open Sans', sans-serif;
        color: #333;
        scroll-behavior: smooth;
    }

    /* 渐变背景与动画 */
    body {
        background: linear-gradient(135deg, #0f2027, #203a43, #2c5364);
        animation: gradientAnimation 15s linear infinite;
    }

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

    /* 导航栏样式 */
    nav {
        position: fixed;
        top: 0;
        width: 100%;
        background: rgba(20, 20, 20, 0.8);
        padding: 20px;
        z-index: 1000;
        transition: background 0.5s;
    }

    nav.scrolled {
        background: rgba(10, 10, 10, 0.9);
    }

    nav ul {
        list-style: none;
        display: flex;
        justify-content: center;
    }

    nav ul li {
        margin: 0 15px;
    }

    nav ul li a {
        color: #fff;
        text-decoration: none;
        font-size: 16px;
        transition: color 0.3s;
    }

    nav ul li a:hover {
        color: #ff7f50;
    }

    /* 进度条样式 */
    .progress-container {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 5px;
        background: rgba(255, 255, 255, 0.2);
        z-index: 999;
    }

    .progress-bar {
        height: 100%;
        width: 0;
        background: #ff7f50;
    }

    /* 全屏区块样式 */
    section {
        display: flex;
        align-items: center;
        justify-content: center;
        height: 100vh;
        padding: 50px;
        background-size: cover;
        background-attachment: fixed;
        background-position: center;
    }

    /* 首页样式 */
    #home {
        background: radial-gradient(circle, rgba(255, 136, 34, 0.8), transparent);
        color: #fff;
        text-align: center;
    }

    #home h1 {
        font-family: 'Roboto', sans-serif;
        font-size: 48px;
        margin-bottom: 20px;
        animation: fadeInUp 2s ease forwards;
    }

    #home p {
        font-size: 24px;
        animation: fadeInUp 2s ease forwards;
        animation-delay: 0.5s;
        opacity: 0;
    }

    /* 产品功能区样式 */
    #features {
        background: linear-gradient( to right, #243949, #517fa4);
        color: #fff;
    }

    #features h2 {
        font-size: 36px;
        margin-bottom: 20px;
    }

    #features .feature-item {
        display: flex;
        align-items: center;
        margin-bottom: 30px;
    }

    #features .feature-item img {
        width: 100px;
        height: 100px;
        margin-right: 20px;
        border-radius: 10px;
    }

    #features .feature-item p {
        font-size: 18px;
    }

    /* 示例展示区样式 */
    #example {
        background: #f5f5f5;
        color: #333;
        text-align: left;
    }

    #example h2 {
        font-size: 32px;
        margin-bottom: 20px;
    }

    #example article {
        background: #fff;
        padding: 20px;
        border-radius: 10px;
        box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    }

    #example pre {
        background: #272822;
        color: #f8f8f2;
        padding: 15px;
        border-radius: 5px;
        overflow-x: auto;
    }

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

    /* 图片布局 */
    .gallery {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
    }

    .gallery img {
        width: 150px;
        height: 150px;
        margin: 10px;
        border-radius: 10px;
        object-fit: cover;
    }

    /* 提示文字样式 */
    .notice {
        position: fixed;
        bottom: 10px;
        right: 10px;
        background: rgba(0,0,0,0.7);
        color: #fff;
        padding: 10px 20px;
        border-radius: 20px;
        font-size: 14px;
    }

    /* 响应式设计 */
    @media (max-width: 768px) {
        nav ul {
            flex-direction: column;
        }

        nav ul li {
            margin: 10px 0;
        }

        #home h1 {
            font-size: 32px;
        }

        #home p {
            font-size: 18px;
        }

        #features .feature-item {
            flex-direction: column;
            align-items: flex-start;
        }

        #features .feature-item img {
            margin-bottom: 10px;
        }
    }

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

        #features h2 {
            font-size: 24px;
        }

        #features .feature-item p {
            font-size: 16px;
        }

        .gallery img {
            width: 100px;
            height: 100px;
        }
    }

    /* 动画效果 */
    @keyframes fadeInUp {
        from {
            opacity: 0;
            transform: translateY(20px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }