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

    body {
        font-family: 'Roboto', sans-serif;
        background: radial-gradient(circle, #0A1A2F, #000000);
        color: #FFFFFF;
        line-height: 1.6;
        overflow-x: hidden;
    }

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

    a:hover {
        color: #8A2BE2;
    }

    /* 头部样式 */
    header {
        position: fixed;
        width: 100%;
        top: 0;
        left: 0;
        background: rgba(10, 26, 47, 0.9);
        padding: 20px 50px;
        display: flex;
        justify-content: space-between;
        align-items: center;
        z-index: 1000;
    }

    header .logo {
        font-family: 'Poppins', sans-serif;
        font-size: 24px;
        color: #FFD700;
    }

    nav ul {
        list-style: none;
        display: flex;
        gap: 20px;
    }

    nav ul li a {
        font-family: 'Poppins', sans-serif;
        font-size: 16px;
        position: relative;
    }

    nav ul li a::after {
        content: '';
        position: absolute;
        width: 0%;
        height: 2px;
        background: #FFD700;
        left: 0;
        bottom: -5px;
        transition: width 0.3s;
    }

    nav ul li a:hover::after {
        width: 100%;
    }

    /* 主视觉区 */
    .hero {
        height: 100vh;
        width: 100%;
        background: url('https://images.gptkong.com/demo/sample1.png') center center/cover no-repeat;
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        position: relative;
        animation: aurora-move 15s linear infinite;
    }

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

    .hero h1 {
        font-family: 'Poppins', sans-serif;
        font-size: 48px;
        color: #FFD700;
        margin-bottom: 20px;
        text-shadow: 0 0 10px #00FFFF;
    }

    .hero p {
        font-size: 18px;
        max-width: 600px;
        text-align: center;
        margin-bottom: 30px;
    }

    .hero .cta-button {
        padding: 15px 30px;
        background: #8A2BE2;
        border: none;
        border-radius: 25px;
        color: #FFFFFF;
        font-size: 16px;
        cursor: pointer;
        transition: background 0.3s, transform 0.3s;
    }

    .hero .cta-button:hover {
        background: #00FFFF;
        transform: scale(1.05);
    }

    /* 内容区 */
    .container {
        padding: 100px 50px;
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 40px;
    }

    .feature {
        background: rgba(255, 255, 255, 0.1);
        padding: 20px;
        border-radius: 10px;
        text-align: center;
        transition: transform 0.3s, background 0.3s;
        position: relative;
    }

    .feature:hover {
        transform: scale(1.05);
        background: rgba(138, 43, 226, 0.2);
    }

    .feature img {
        width: 80px;
        height: 80px;
        margin-bottom: 15px;
        animation: float 6s ease-in-out infinite;
    }

    @keyframes float {
        0%, 100% { transform: translateY(0); }
        50% { transform: translateY(-10px); }
    }

    .feature h3 {
        font-family: 'Poppins', sans-serif;
        font-size: 20px;
        margin-bottom: 10px;
        color: #FFD700;
    }

    .feature p {
        font-size: 14px;
        color: #FFFFFF;
    }

    /* 示例展示区 */
    .sample-article {
        padding: 50px;
        background: rgba(255, 255, 255, 0.05);
        border-radius: 10px;
        margin: 50px;
    }

    .sample-article h2 {
        font-family: 'Poppins', sans-serif;
        font-size: 28px;
        color: #FFD700;
        margin-bottom: 20px;
    }

    .sample-article p {
        margin-bottom: 15px;
    }

    .sample-article ul {
        list-style: disc inside;
        margin-bottom: 15px;
    }

    .sample-article pre {
        background: rgba(0, 0, 0, 0.7);
        padding: 15px;
        border-radius: 5px;
        overflow-x: auto;
        margin-bottom: 15px;
    }

    .sample-article code {
        color: #00FFFF;
        font-family: 'Courier New', Courier, monospace;
    }

    /* 提示区 */
    .reference-note {
        text-align: center;
        padding: 20px;
        background: rgba(138, 43, 226, 0.2);
        border-radius: 10px;
        margin: 20px;
        font-size: 16px;
        color: #FFFFFF;
    }

    /* 底部样式 */
    footer {
        background: rgba(10, 26, 47, 0.9);
        padding: 20px 50px;
        text-align: center;
        color: #FFFFFF;
    }

    footer p {
        font-size: 14px;
    }

    /* 响应式设计 */
    @media (max-width: 1440px) {
        .container {
            grid-template-columns: repeat(3, 1fr);
        }
    }

    @media (max-width: 1200px) {
        header {
            padding: 15px 30px;
        }

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

        .hero p {
            font-size: 16px;
            max-width: 500px;
        }

        .container {
            grid-template-columns: repeat(2, 1fr);
            padding: 80px 30px;
            gap: 30px;
        }
    }

    @media (max-width: 1024px) {
        header {
            padding: 10px 20px;
        }

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

        .hero p {
            font-size: 14px;
            max-width: 400px;
        }

        .container {
            grid-template-columns: 1fr;
            padding: 60px 20px;
            gap: 20px;
        }

        .feature img {
            width: 60px;
            height: 60px;
        }
    }

    @media (max-width: 768px) {
        header {
            flex-direction: column;
            align-items: flex-start;
        }

        nav ul {
            flex-direction: column;
            gap: 10px;
            margin-top: 10px;
        }

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

        .hero p {
            font-size: 13px;
            max-width: 300px;
        }

        .container {
            padding: 40px 15px;
        }

        .sample-article {
            padding: 30px;
            margin: 30px 10px;
        }
    }

    @media (max-width: 480px) {
        header {
            padding: 10px 15px;
        }

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

        .hero p {
            font-size: 12px;
            max-width: 250px;
        }

        .feature img {
            width: 50px;
            height: 50px;
        }

        .container {
            padding: 30px 10px;
        }

        .sample-article {
            padding: 20px;
            margin: 20px 5px;
        }

        .reference-note {
            font-size: 14px;
            padding: 15px;
        }
    }

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

        .hero p {
            font-size: 11px;
            max-width: 200px;
        }

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

        nav ul li a {
            font-size: 14px;
        }
    }

    /* 动画效果 */
    @keyframes star-particles {
        0% { transform: translate(0, 0); opacity: 1; }
        100% { transform: translate(-50px, 50px); opacity: 0; }
    }

    .particle {
        position: absolute;
        width: 2px;
        height: 2px;
        background: #FFFFFF;
        border-radius: 50%;
        animation: star-particles 10s infinite;
    }

    /* 按钮样式 */
    .btn {
        padding: 10px 20px;
        background: #8A2BE2;
        border: none;
        border-radius: 5px;
        color: #FFFFFF;
        cursor: pointer;
        transition: background 0.3s, transform 0.3s;
    }

    .btn:hover {
        background: #00FFFF;
        transform: scale(1.05);
    }