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

    body {
        font-family: 'Roboto', sans-serif;
        background: linear-gradient(135deg, #0A1F3D, #4C2D8F);
        color: #F5F7FA;
        line-height: 1.6;
        overflow-x: hidden;
    }

    a {
        color: #FF6B35;
        text-decoration: none;
        transition: color 0.3s ease;
    }

    a:hover {
        color: #4CAF50;
    }

    /* 头部样式 */
    header {
        width: 100%;
        padding: 20px 50px;
        display: flex;
        justify-content: space-between;
        align-items: center;
        background: rgba(10, 31, 61, 0.8);
        position: fixed;
        top: 0;
        z-index: 1000;
    }

    header .logo {
        font-size: 1.5rem;
        font-weight: bold;
        color: #FF6B35;
    }

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

    nav ul li a {
        font-size: 1rem;
        padding: 5px 10px;
        border-radius: 5px;
    }

    nav ul li a:hover {
        background: rgba(255, 107, 53, 0.2);
        box-shadow: 0 0 10px rgba(255, 107, 53, 0.5);
    }

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

    .hero::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: radial-gradient(circle, rgba(255,87,34,0.5), transparent);
        animation: overlay 10s ease-in-out infinite;
    }

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

    .hero-content h1 {
        font-size: 3rem;
        margin-bottom: 20px;
        animation: fadeInDown 2s ease-out;
    }

    .hero-content p {
        font-size: 1.2rem;
        margin-bottom: 30px;
        animation: fadeInUp 2s ease-out;
    }

    .hero-content .cta-button {
        background-color: #FF6B35;
        padding: 15px 30px;
        border: none;
        border-radius: 30px;
        color: #FFFFFF;
        font-size: 1rem;
        cursor: pointer;
        transition: all 0.3s ease;
    }

    .hero-content .cta-button:hover {
        box-shadow: 0 0 20px #FF6B35;
        transform: translateY(-5px);
    }

    /* 主体内容样式 */
    main {
        padding: 100px 50px 50px 50px;
        background: #F5F7FA;
        color: #0A1F3D;
    }

    .section {
        margin-bottom: 50px;
    }

    .section h2 {
        font-size: 2rem;
        margin-bottom: 20px;
        color: #0A1F3D;
        border-bottom: 2px solid #FF6B35;
        display: inline-block;
    }

    .section p {
        font-size: 1rem;
        margin-bottom: 15px;
    }

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

    .card {
        background: #FFFFFF;
        color: #0A1F3D;
        padding: 20px;
        border-radius: 10px;
        box-shadow: 0 4px 6px rgba(0,0,0,0.1);
        flex: 1 1 calc(33.333% - 40px);
        transition: transform 0.3s ease, box-shadow 0.3s ease;
    }

    .card:hover {
        transform: translateY(-10px);
        box-shadow: 0 10px 20px rgba(0,0,0,0.2);
    }

    .card img {
        width: 100%;
        height: auto;
        border-radius: 5px;
        margin-bottom: 15px;
    }

    .card h3 {
        font-size: 1.5rem;
        margin-bottom: 10px;
    }

    .card p {
        font-size: 0.9rem;
        color: #555555;
    }

    /* 示例展示样式 */
    .example {
        background: #EFEFEF;
        padding: 20px;
        border-radius: 10px;
        margin-top: 30px;
        overflow-x: auto;
    }

    .example code {
        background: #2D2D2D;
        color: #FFFFFF;
        padding: 10px;
        display: block;
        border-radius: 5px;
        font-family: 'Courier New', Courier, monospace;
        white-space: pre-wrap;
    }

    /* 响应式设计 */
    @media (max-width: 1440px) {
        main {
            padding: 80px 40px 40px 40px;
        }

        .cards {
            gap: 15px;
        }

        .card {
            flex: 1 1 calc(33.333% - 30px);
        }
    }

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

        .hero-content h1 {
            font-size: 2.5rem;
        }

        .hero-content p {
            font-size: 1rem;
        }

        .hero-content .cta-button {
            padding: 12px 25px;
            font-size: 0.9rem;
        }

        .card {
            flex: 1 1 calc(50% - 20px);
        }
    }

    @media (max-width: 1024px) {
        .cards {
            flex-direction: column;
        }

        .card {
            flex: 1 1 100%;
        }
    }

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

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

        main {
            padding: 60px 20px 20px 20px;
        }

        .hero-content h1 {
            font-size: 2rem;
        }

        .hero-content p {
            font-size: 0.9rem;
        }

        .hero-content .cta-button {
            padding: 10px 20px;
            font-size: 0.8rem;
        }
    }

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

        .hero {
            background: url('https://images.gptkong.com/demo/sample2.png') no-repeat center center/cover;
        }

        main {
            padding: 50px 10px 10px 10px;
        }

        .card {
            padding: 15px;
        }

        .section h2 {
            font-size: 1.5rem;
        }

        .cards {
            gap: 10px;
        }

        .example code {
            font-size: 0.8rem;
        }
    }

    @media (max-width: 320px) {
        header .logo {
            font-size: 1.2rem;
        }

        nav ul li a {
            font-size: 0.8rem;
        }

        .hero-content h1 {
            font-size: 1.5rem;
        }

        .hero-content p {
            font-size: 0.8rem;
        }

        .hero-content .cta-button {
            padding: 8px 15px;
            font-size: 0.7rem;
        }

        .section h2 {
            font-size: 1.2rem;
        }

        .card h3 {
            font-size: 1.2rem;
        }

        .card p {
            font-size: 0.8rem;
        }
    }

    /* 动画效果 */
    @keyframes aurora-move {
        0% {
            background-position: 0% 50%;
        }
        50% {
            background-position: 100% 50%;
        }
        100% {
            background-position: 0% 50%;
        }
    }

    @keyframes fadeInDown {
        from {
            opacity: 0;
            transform: translateY(-20px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    @keyframes fadeInUp {
        from {
            opacity: 0;
            transform: translateY(20px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    @keyframes overlay {
        0% {
            opacity: 0.3;
        }
        50% {
            opacity: 0.6;
        }
        100% {
            opacity: 0.3;
        }
    }

    /* 提示信息样式 */
    .reference-note {
        text-align: center;
        font-size: 0.9rem;
        color: #FF6B35;
        margin-top: 20px;
    }