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

    /* 字体和背景 */
    body {
        font-family: 'Roboto', 'Open Sans', sans-serif;
        background: linear-gradient(135deg, #0A1F44, #8E44AD);
        color: #ffffff;
        line-height: 1.6;
        overflow-x: hidden;
    }

    /* 导航栏样式 */
    .navbar {
        position: fixed;
        top: 0;
        width: 100%;
        background-color: rgba(10, 31, 68, 0.9);
        display: flex;
        justify-content: center;
        padding: 20px 0;
        z-index: 1000;
    }

    .navbar ul {
        list-style: none;
        display: flex;
        gap: 30px;
    }

    .navbar a {
        text-decoration: none;
        color: #BDC3C7;
        font-family: 'Exo 2', sans-serif;
        font-size: 16px;
        transition: color 0.3s;
    }

    .navbar a:hover {
        color: #34C759;
    }

    /* 侧边进度条 */
    .progress-indicator {
        position: fixed;
        top: 50%;
        left: 10px;
        transform: translateY(-50%);
        width: 5px;
        height: 100%;
        background: rgba(189, 195, 199, 0.3);
        border-radius: 5px;
    }

    .progress-indicator::after {
        content: '';
        display: block;
        width: 100%;
        height: 0%;
        background: #34C759;
        border-radius: 5px;
        transition: height 0.3s;
    }

    /* 标题区样式 */
    .header {
        height: 100vh;
        display: flex;
        justify-content: center;
        align-items: center;
        text-align: center;
        background: url('https://images.gptkong.com/demo/sample1.png') no-repeat center center/cover;
        animation: entrance 3s ease-out forwards;
    }

    .header h1 {
        font-family: 'Futura', 'Exo 2', sans-serif;
        font-size: 48px;
        color: #ffffff;
        animation: fadeIn 2s ease-in-out;
    }

    /* 功能模块样式 */
    .section {
        padding: 80px 20px;
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        align-items: center;
        background: rgba(10, 31, 68, 0.8);
    }

    .section:nth-child(even) {
        background: rgba(142, 68, 173, 0.8);
    }

    .section .content {
        flex: 1 1 300px;
        padding: 20px;
    }

    .section .content h2 {
        font-family: 'Futura', 'Exo 2', sans-serif;
        font-size: 32px;
        margin-bottom: 20px;
        color: #34C759;
    }

    .section .content p {
        font-size: 16px;
        margin-bottom: 20px;
    }

    .section .image {
        flex: 1 1 300px;
        padding: 20px;
        text-align: center;
    }

    .section .image img {
        width: 100%;
        max-width: 320px;
        border-radius: 10px;
        box-shadow: 0 4px 15px rgba(0,0,0,0.3);
    }

    /* 底部行动号召 */
    .footer {
        padding: 60px 20px;
        text-align: center;
        background: rgba(10, 31, 68, 0.9);
    }

    .footer button {
        background: #34C759;
        border: none;
        padding: 15px 30px;
        font-size: 18px;
        color: #ffffff;
        border-radius: 5px;
        cursor: pointer;
        transition: background 0.3s, transform 0.3s;
        position: relative;
        overflow: hidden;
    }

    .footer button::before {
        content: '';
        position: absolute;
        width: 100%;
        height: 100%;
        top: 0;
        left: 0;
        background: rgba(255, 255, 255, 0.2);
        opacity: 0;
        transition: opacity 0.3s;
    }

    .footer button:hover::before {
        opacity: 1;
    }

    .footer button:hover {
        background: #28a745;
        transform: scale(1.05);
    }

    /* 示例展示样式 */
    .example-display {
        padding: 80px 20px;
        background: rgba(189, 195, 199, 0.1);
    }

    .example-display h2 {
        font-family: 'Futura', 'Exo 2', sans-serif;
        font-size: 28px;
        margin-bottom: 20px;
        color: #BDC3C7;
        text-align: center;
    }

    .example-display article {
        max-width: 800px;
        margin: 0 auto;
        background: rgba(255, 255, 255, 0.05);
        padding: 20px;
        border-radius: 10px;
    }

    .example-display pre {
        background: rgba(0, 0, 0, 0.7);
        padding: 15px;
        border-radius: 5px;
        overflow-x: auto;
    }

    .example-display code {
        color: #34C759;
        font-family: 'Courier New', Courier, monospace;
    }

    /* 提示文字样式 */
    .reference-note {
        text-align: center;
        font-size: 14px;
        color: #BDC3C7;
        margin: 20px 0;
    }

    /* 动画定义 */
    @keyframes fadeIn {
        from { opacity: 0; }
        to { opacity: 1; }
    }

    @keyframes entrance {
        from { transform: scale(0.8); opacity: 0; }
        to { transform: scale(1); opacity: 1; }
    }

    /* 交互效果 */
    .button {
        position: relative;
        overflow: hidden;
    }

    .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%);
        transition: all 0.5s;
    }

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

    /* 响应式设计 */
    @media (max-width: 1440px) {
        .header h1 {
            font-size: 42px;
        }

        .section .content h2 {
            font-size: 28px;
        }

        .footer button {
            font-size: 16px;
            padding: 12px 25px;
        }
    }

    @media (max-width: 1200px) {
        .navbar ul {
            gap: 20px;
        }

        .header h1 {
            font-size: 36px;
        }

        .section {
            padding: 60px 15px;
        }
    }

    @media (max-width: 1024px) {
        .navbar a {
            font-size: 14px;
        }

        .header h1 {
            font-size: 30px;
        }

        .section .content h2 {
            font-size: 24px;
        }

        .footer button {
            font-size: 14px;
            padding: 10px 20px;
        }
    }

    @media (max-width: 768px) {
        .navbar ul {
            flex-direction: column;
            gap: 10px;
        }

        .header h1 {
            font-size: 28px;
        }

        .section {
            flex-direction: column;
        }

        .section .image, .section .content {
            flex: none;
            width: 100%;
        }

        .footer button {
            width: 100%;
        }
    }

    @media (max-width: 480px) {
        .navbar {
            padding: 15px 0;
        }

        .navbar a {
            font-size: 12px;
        }

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

        .section .content h2 {
            font-size: 20px;
        }

        .footer button {
            font-size: 12px;
            padding: 8px 16px;
        }
    }

    @media (max-width: 320px) {
        .navbar ul {
            gap: 10px;
        }

        .header h1 {
            font-size: 20px;
        }

        .section .content h2 {
            font-size: 18px;
        }

        .example-display article {
            padding: 15px;
        }
    }