/* 引入字体 */
    @import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;600&family=Inter:wght@400;700&display=swap');

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

    body {
        font-family: 'Inter', sans-serif;
        background: linear-gradient(135deg, #0a2647, #000000);
        color: #ffffff;
        line-height: 1.6;
        overflow-x: hidden;
    }

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

    a:hover {
        color: #ff00e1;
    }

    /* 导航栏 */
    .navbar {
        position: fixed;
        top: 0;
        width: 100%;
        background: rgba(10, 38, 71, 0.8);
        padding: 20px 40px;
        display: flex;
        justify-content: space-between;
        align-items: center;
        z-index: 1000;
    }

    .navbar .logo {
        font-family: 'Poppins', sans-serif;
        font-size: 24px;
        font-weight: 600;
        color: #ffffff;
    }

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

    .navbar ul li {
        margin-left: 20px;
    }

    .navbar ul li a {
        font-size: 16px;
        font-weight: 400;
        color: #ffffff;
        padding: 8px 12px;
        border-radius: 4px;
        transition: background 0.3s ease, color 0.3s ease;
    }

    .navbar ul li a:hover {
        background: #ff00e1;
        color: #ffffff;
    }

    /* 主页横幅 */
    .hero {
        height: 100vh;
        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;
        text-align: center;
        position: relative;
    }

    .hero::before {
        content: "";
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: linear-gradient(135deg, rgba(10, 38, 71, 0.8), rgba(0, 0, 0, 0.8));
        z-index: 1;
    }

    .hero-content {
        position: relative;
        z-index: 2;
        max-width: 800px;
        padding: 20px;
    }

    .hero h1 {
        font-family: 'Poppins', sans-serif;
        font-size: 48px;
        font-weight: 700;
        background: linear-gradient(135deg, #ff00e1, #00ffff);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        animation: neonGlow 2s infinite alternate;
    }

    @keyframes neonGlow {
        from {
            text-shadow: 0 0 10px #ff00e1, 0 0 20px #ff00e1, 0 0 30px #00ffff;
        }
        to {
            text-shadow: 0 0 20px #ff00e1, 0 0 30px #ff00e1, 0 0 40px #00ffff;
        }
    }

    .hero p {
        font-size: 18px;
        margin-top: 20px;
        color: #cccccc;
    }

    .hero .cta-button {
        margin-top: 30px;
        padding: 15px 30px;
        background-color: #00ffff;
        color: #000000;
        font-size: 16px;
        font-weight: 600;
        border: none;
        border-radius: 30px;
        cursor: pointer;
        transition: background-color 0.3s ease, transform 0.3s ease;
    }

    .hero .cta-button:hover {
        background-color: #ff00e1;
        transform: scale(1.05);
    }

    /* 内容区 */
    .content {
        padding: 100px 40px;
        background: linear-gradient(135deg, #0a2647, #000000);
    }

    .content h2 {
        font-family: 'Poppins', sans-serif;
        font-size: 36px;
        color: #00ffff;
        text-align: center;
        margin-bottom: 40px;
    }

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

    .content .grid-item {
        background: rgba(255, 255, 255, 0.1);
        padding: 20px;
        border-radius: 10px;
        flex: 1 1 300px;
        max-width: 320px;
        position: relative;
        overflow: hidden;
        transition: transform 0.3s ease, box-shadow 0.3s ease;
    }

    .content .grid-item:hover {
        transform: scale(1.05);
        box-shadow: 0 0 20px #ff00e1, 0 0 40px #00ffff;
    }

    .content .grid-item img {
        width: 100%;
        height: auto;
        border-radius: 8px;
    }

    .content .grid-item h3 {
        margin-top: 15px;
        font-size: 24px;
        color: #ffffff;
    }

    .content .grid-item p {
        margin-top: 10px;
        color: #cccccc;
    }

    /* 示例展示 */
    .example-section {
        padding: 100px 40px;
        background: linear-gradient(135deg, #000000, #0a2647);
    }

    .example-section h2 {
        font-family: 'Poppins', sans-serif;
        font-size: 32px;
        color: #ff00e1;
        text-align: center;
        margin-bottom: 40px;
    }

    .example-section article {
        max-width: 800px;
        margin: 0 auto;
        background: rgba(255, 255, 255, 0.05);
        padding: 30px;
        border-radius: 10px;
    }

    .example-section article h2 {
        font-size: 28px;
        color: #00ffff;
        margin-bottom: 20px;
    }

    .example-section article h3 {
        font-size: 22px;
        color: #ff00e1;
        margin-top: 20px;
        margin-bottom: 10px;
    }

    .example-section article p {
        font-size: 16px;
        color: #cccccc;
        margin-bottom: 15px;
    }

    .example-section article pre {
        background: #1e1e1e;
        padding: 15px;
        border-radius: 5px;
        overflow-x: auto;
        margin-bottom: 15px;
    }

    .example-section article code {
        color: #00ffff;
        font-family: 'Courier New', Courier, monospace;
    }

    /* 提示信息 */
    .reference-note {
        text-align: center;
        padding: 20px;
        background: rgba(255, 255, 255, 0.1);
        color: #ffffff;
        font-size: 18px;
        margin: 40px 0;
        border-radius: 10px;
    }

    /* 3D立方体动画 */
    .cube-container {
        display: flex;
        justify-content: center;
        align-items: center;
        margin: 50px 0;
    }

    .cube {
        width: 100px;
        height: 100px;
        position: relative;
        transform-style: preserve-3d;
        animation: rotateCube 5s infinite linear;
    }

    .cube div {
        position: absolute;
        width: 100px;
        height: 100px;
        background: rgba(255, 0, 225, 0.8);
        border: 2px solid #00ffff;
    }

    .cube .front  { transform: rotateY(0deg) translateZ(50px); }
    .cube .back   { transform: rotateY(180deg) translateZ(50px); }
    .cube .right  { transform: rotateY(90deg) translateZ(50px); }
    .cube .left   { transform: rotateY(-90deg) translateZ(50px); }
    .cube .top    { transform: rotateX(90deg) translateZ(50px); }
    .cube .bottom { transform: rotateX(-90deg) translateZ(50px); }

    @keyframes rotateCube {
        from { transform: rotateY(0deg); }
        to { transform: rotateY(360deg); }
    }

    /* 动态粒子效果 */
    .particles {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: url('https://images.gptkong.com/demo/sample2.png') repeat;
        opacity: 0.1;
        z-index: 0;
        animation: moveParticles 20s linear infinite;
    }

    @keyframes moveParticles {
        from { background-position: 0 0; }
        to { background-position: 1000px 1000px; }
    }

    /* 响应式设计 */
    @media only screen and (max-width: 1440px) {
        .hero h1 {
            font-size: 40px;
        }
        .navbar {
            padding: 15px 30px;
        }
    }

    @media only screen and (max-width: 1200px) {
        .content .grid {
            flex-direction: row;
        }
        .hero h1 {
            font-size: 36px;
        }
    }

    @media only screen and (max-width: 1024px) {
        .navbar ul li {
            margin-left: 15px;
        }
        .content .grid-item {
            max-width: 280px;
        }
    }

    @media only screen and (max-width: 768px) {
        .navbar {
            flex-direction: column;
            align-items: flex-start;
        }
        .content .grid {
            flex-direction: column;
            align-items: center;
        }
        .hero h1 {
            font-size: 28px;
        }
        .hero p {
            font-size: 16px;
        }
    }

    @media only screen and (max-width: 480px) {
        .hero h1 {
            font-size: 24px;
        }
        .navbar ul {
            flex-direction: column;
            width: 100%;
        }
        .navbar ul li {
            margin: 10px 0;
        }
    }

    @media only screen and (max-width: 320px) {
        .hero h1 {
            font-size: 20px;
        }
        .hero p {
            font-size: 14px;
        }
        .hero .cta-button {
            padding: 10px 20px;
            font-size: 14px;
        }
    }