/* 基本重置 */
    * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
    }

    body {
        font-family: 'Roboto', sans-serif;
        background: radial-gradient(circle at top left, #1e3c72, #2a5298);
        color: #ffffff;
        line-height: 1.6;
        overflow-x: hidden;
    }

    header {
        position: fixed;
        top: 0;
        width: 100%;
        background: rgba(0, 0, 0, 0.7);
        padding: 20px 50px;
        display: flex;
        justify-content: space-between;
        align-items: center;
        z-index: 1000;
    }

    header h1 {
        font-family: 'Exo 2', sans-serif;
        font-size: 24px;
        color: #ff6f61;
        text-transform: uppercase;
    }

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

    nav ul li {
        margin-left: 20px;
    }

    nav ul li a {
        text-decoration: none;
        color: #ffffff;
        font-family: 'Poppins', sans-serif;
        transition: color 0.3s ease;
    }

    nav ul li a:hover {
        color: #ff6f61;
    }

    .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::after {
        content: "";
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(30, 60, 114, 0.5);
        backdrop-filter: blur(5px);
    }

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

    .hero-content h2 {
        font-family: 'Exo 2', sans-serif;
        font-size: 48px;
        background: linear-gradient(135deg, #ff6f61, #7f00ff, #00e5ff);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        animation: gradient-text 5s ease infinite;
    }

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

    /* 主要内容区 */
    .container {
        padding: 100px 50px;
        max-width: 1200px;
        margin: 0 auto;
    }

    .section-title {
        font-family: 'Exo 2', sans-serif;
        font-size: 36px;
        color: #ff6f61;
        margin-bottom: 20px;
        text-align: center;
    }

    .content {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 40px;
    }

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

    .content div {
        background: rgba(255, 255, 255, 0.1);
        padding: 20px;
        border-radius: 10px;
        backdrop-filter: blur(10px);
    }

    .content h3 {
        font-family: 'Poppins', sans-serif;
        font-size: 24px;
        color: #00e5ff;
        margin-bottom: 10px;
    }

    .content p {
        font-size: 16px;
        color: #ffffff;
    }

    /* 示例展示 */
    .example {
        background: linear-gradient(135deg, #2a5298, #1e3c72);
        padding: 50px;
        border-radius: 15px;
        margin-top: 60px;
        position: relative;
    }

    .example::before {
        content: "示例展示";
        position: absolute;
        top: -20px;
        left: 20px;
        background: #ff6f61;
        padding: 5px 15px;
        border-radius: 20px;
        font-family: 'Poppins', sans-serif;
        font-size: 14px;
        color: #ffffff;
    }

    .example article {
        max-height: 600px;
        overflow-y: auto;
    }

    .example pre {
        background: rgba(0, 0, 0, 0.7);
        padding: 15px;
        border-radius: 10px;
        overflow-x: auto;
        font-family: 'Roboto Mono', monospace;
        font-size: 14px;
        margin-bottom: 20px;
    }

    .example code {
        color: #00e5ff;
    }

    /* 按钮样式 */
    .btn {
        display: inline-block;
        padding: 10px 20px;
        background: #00bcd4;
        color: #ffffff;
        border: none;
        border-radius: 5px;
        cursor: pointer;
        transition: background 0.3s ease, box-shadow 0.3s ease;
        font-family: 'Poppins', sans-serif;
    }

    .btn:hover {
        background: #0097a7;
        box-shadow: 0 0 10px #00bcd4;
    }

    /* 页脚样式 */
    footer {
        background: rgba(0, 0, 0, 0.8);
        padding: 20px 50px;
        text-align: center;
        font-family: 'Poppins', sans-serif;
        color: #ffffff;
    }

    /* 动画关键帧 */
    @keyframes aurora-move {
        0% {
            background-position: 0% 50%;
        }
        50% {
            background-position: 100% 50%;
        }
        100% {
            background-position: 0% 50%;
        }
    }

    @keyframes gradient-text {
        0% {
            background-position: 0% 50%;
        }
        50% {
            background-position: 100% 50%;
        }
        100% {
            background-position: 0% 50%;
        }
    }

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

        .content {
            grid-template-columns: 1fr 1fr;
        }
    }

    @media (max-width: 1200px) {
        .container {
            padding: 70px 30px;
        }

        nav ul li {
            margin-left: 15px;
        }

        .hero-content h2 {
            font-size: 40px;
        }
    }

    @media (max-width: 1024px) {
        .content {
            grid-template-columns: 1fr;
        }

        header {
            padding: 15px 30px;
        }

        .hero-content h2 {
            font-size: 32px;
        }
    }

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

        nav ul {
            flex-direction: column;
            width: 100%;
            display: none;
        }

        nav ul.show {
            display: flex;
        }

        nav ul li {
            margin: 10px 0;
        }

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

        .container {
            padding: 60px 20px;
        }
    }

    @media (max-width: 480px) {
        .hero-content h2 {
            font-size: 24px;
        }

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

        .content img {
            height: auto;
        }
    }

    @media (max-width: 320px) {
        header {
            padding: 10px 20px;
        }

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

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

        .btn {
            padding: 8px 16px;
        }
    }