/* 全局样式 */
    body {
        margin: 0;
        padding: 0;
        font-family: 'Roboto', 'Open Sans', sans-serif;
        background: linear-gradient(135deg, #1E3A8A, #4ADE80);
        color: #FFFFFF;
        overflow-x: hidden;
    }

    /* 导航栏 */
    .navbar {
        position: fixed;
        top: 0;
        width: 100%;
        background: rgba(31, 41, 55, 0.8);
        backdrop-filter: blur(10px);
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 20px 40px;
        z-index: 1000;
        transition: background 0.5s ease;
    }

    .navbar.scrolled {
        background: linear-gradient(135deg, #1F2937, #4ADE80);
    }

    .navbar a {
        color: #FFFFFF;
        text-decoration: none;
        margin: 0 15px;
        font-size: 16px;
        transition: color 0.3s ease;
    }

    .navbar a:hover {
        color: #4ADE80;
    }

    /* 主页横幅 */
    .hero {
        height: 100vh;
        display: flex;
        justify-content: center;
        align-items: center;
        position: relative;
        background: url('https://images.gptkong.com/demo/sample1.png') center center / cover no-repeat;
    }

    .hero::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: linear-gradient(135deg, #1E3A8A, #4ADE80);
        opacity: 0.7;
    }

    .hero-content {
        position: relative;
        text-align: center;
        z-index: 1;
    }

    .hero h1 {
        font-size: 48px;
        font-weight: bold;
        margin-bottom: 20px;
        text-shadow: 2px 2px 8px rgba(0,0,0,0.6);
    }

    .hero p {
        font-size: 20px;
        max-width: 600px;
        margin: 0 auto;
        line-height: 1.6;
    }

    /* 主要内容区域 */
    .container {
        padding: 80px 20px;
        max-width: 1200px;
        margin: 0 auto;
    }

    .section {
        margin-bottom: 60px;
    }

    .section h2 {
        font-size: 36px;
        margin-bottom: 20px;
        text-align: center;
        position: relative;
    }

    .section h2::after {
        content: '';
        width: 60px;
        height: 4px;
        background: #4ADE80;
        display: block;
        margin: 10px auto 0;
        border-radius: 2px;
    }

    .cards {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 20px;
    }

    .card {
        background: rgba(255, 255, 255, 0.1);
        border-radius: 15px;
        box-shadow: 0 4px 15px rgba(0,0,0,0.3);
        padding: 30px;
        width: 300px;
        transition: transform 0.3s ease, box-shadow 0.3s ease;
    }

    .card:hover {
        transform: scale(1.05);
        box-shadow: 0 6px 20px rgba(0,0,0,0.4);
    }

    .card img {
        width: 100%;
        border-radius: 10px;
        margin-bottom: 20px;
    }

    .card h3 {
        font-size: 24px;
        margin-bottom: 10px;
    }

    .card p {
        font-size: 16px;
        line-height: 1.5;
    }

    /* 示例数据展示 */
    .example-section {
        background: rgba(31, 41, 55, 0.9);
        padding: 40px;
        border-radius: 10px;
    }

    .example-section h2 {
        color: #FFD700;
    }

    .example-section article {
        max-height: 600px;
        overflow-y: auto;
        padding: 20px;
        background: rgba(255, 255, 255, 0.1);
        border-radius: 10px;
    }

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

    .example-section code {
        color: #4ADE80;
        font-family: 'Courier New', Courier, monospace;
    }

    /* 提示信息 */
    .notice {
        text-align: center;
        font-size: 18px;
        margin: 40px 0;
        color: #FFDD57;
    }

    /* 页脚 */
    footer {
        background: rgba(31, 41, 55, 0.8);
        padding: 20px;
        text-align: center;
        color: #FFFFFF;
    }

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

        .hero p {
            font-size: 18px;
        }

        .section h2 {
            font-size: 32px;
        }

        .card {
            width: 280px;
            padding: 25px;
        }
    }

    @media (max-width: 1200px) {
        .cards {
            flex-direction: row;
            justify-content: center;
        }

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

        .hero p {
            font-size: 16px;
        }

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

        .card {
            width: 260px;
            padding: 20px;
        }
    }

    @media (max-width: 1024px) {
        .navbar {
            padding: 15px 30px;
        }

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

        .hero p {
            font-size: 16px;
        }

        .section h2 {
            font-size: 26px;
        }

        .card {
            width: 240px;
            padding: 18px;
        }
    }

    @media (max-width: 768px) {
        .navbar a {
            margin: 0 10px;
            font-size: 14px;
        }

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

        .hero p {
            font-size: 14px;
        }

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

        .card {
            width: 100%;
            max-width: 300px;
        }

        .cards {
            flex-direction: column;
            align-items: center;
        }
    }

    @media (max-width: 480px) {
        .navbar {
            padding: 10px 20px;
        }

        .navbar a {
            margin: 0 5px;
            font-size: 12px;
        }

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

        .hero p {
            font-size: 12px;
        }

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

        .card {
            width: 100%;
            padding: 15px;
        }
    }

    @media (max-width: 320px) {
        .hero h1 {
            font-size: 20px;
        }

        .hero p {
            font-size: 10px;
        }

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

        .card {
            padding: 10px;
        }
    }

    /* 动画效果 */
    .wave {
        position: relative;
        width: 100%;
        height: 50px;
        overflow: hidden;
        margin-top: 40px;
    }

    .wave::before {
        content: '';
        position: absolute;
        top: 0;
        left: -50%;
        width: 200%;
        height: 100%;
        background: radial-gradient(circle at center, transparent 50%, #4ADE80 50%);
        animation: wave-animation 2s infinite linear;
    }

    @keyframes wave-animation {
        from { transform: translateX(0); }
        to { transform: translateX(-100%); }
    }

    .fade-in {
        opacity: 0;
        transform: translateY(20px);
        transition: all 0.5s ease;
    }

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