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

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

    /* 导航栏样式 */
    .navbar {
        position: fixed;
        top: 0;
        width: 100%;
        background: rgba(0, 0, 0, 0.5);
        padding: 20px 50px;
        display: flex;
        justify-content: space-between;
        align-items: center;
        transition: background 0.3s ease;
        z-index: 1000;
    }

    .navbar.scrolled {
        background: rgba(0, 0, 0, 0.9);
    }

    .navbar .logo {
        font-size: 24px;
        font-family: 'Inter', sans-serif;
        font-weight: bold;
        color: #ffcc00;
    }

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

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

    .navbar ul li a {
        text-decoration: none;
        color: #ffffff;
        font-size: 16px;
        transition: color 0.3s ease;
    }

    .navbar ul li a:hover {
        color: #ffcc00;
    }

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

    .hero::after {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0, 0, 0, 0.5);
    }

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

    .hero-content h1 {
        font-size: 48px;
        margin-bottom: 20px;
        color: #ffffff;
        text-shadow: 2px 2px 8px rgba(0,0,0,0.7);
    }

    .hero-content p {
        font-size: 18px;
        color: #dddddd;
    }

    /* 卡片布局 */
    .card-container {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 20px;
        padding: 100px 50px;
    }

    .card {
        background: rgba(255, 255, 255, 0.1);
        border-radius: 15px;
        box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
        backdrop-filter: blur(5px);
        -webkit-backdrop-filter: blur(5px);
        border: 1px solid rgba(255, 255, 255, 0.3);
        padding: 20px;
        transition: transform 0.3s ease, box-shadow 0.3s ease;
        position: relative;
        overflow: hidden;
    }

    .card:hover {
        transform: translateY(-10px);
        box-shadow: 0 8px 60px rgba(0, 0, 0, 0.3);
    }

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

    .card h3 {
        margin: 15px 0 10px;
        font-family: 'Inter', sans-serif;
        color: #ffcc00;
    }

    .card p {
        font-size: 14px;
        color: #cccccc;
    }

    .card .tags {
        margin-top: 10px;
    }

    .card .tags span {
        background: #ffcc00;
        color: #000000;
        padding: 5px 10px;
        border-radius: 5px;
        font-size: 12px;
        margin-right: 5px;
    }

    /* 示例展示文章 */
    .example-article {
        padding: 50px;
        background: rgba(0, 0, 0, 0.7);
        margin: 50px;
        border-radius: 15px;
        box-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
    }

    .example-article h2 {
        font-size: 32px;
        margin-bottom: 20px;
        color: #ffcc00;
        text-align: center;
    }

    .example-article h3, .example-article h4 {
        font-family: 'Inter', sans-serif;
        color: #ffffff;
        margin-top: 20px;
        margin-bottom: 10px;
    }

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

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

    .example-article pre {
        background: #1e1e1e;
        padding: 15px;
        border-radius: 10px;
        overflow-x: auto;
        margin-bottom: 15px;
    }

    .example-article code {
        color: #ffcc00;
        font-family: 'Courier New', Courier, monospace;
    }

    /* 底部样式 */
    .footer {
        background: rgba(0, 0, 0, 0.8);
        color: #cccccc;
        text-align: center;
        padding: 20px;
        position: relative;
    }

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

    .hero {
        animation: auroraMove 15s linear infinite;
    }

    /* 响应式设计 */
    @media (max-width: 320px) {
        .navbar {
            padding: 10px 20px;
        }

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

        .card-container {
            padding: 80px 20px;
        }
    }

    @media (max-width: 480px) {
        .navbar ul li a {
            font-size: 14px;
        }

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

        .card {
            padding: 15px;
        }
    }

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

        .navbar ul {
            flex-direction: column;
            width: 100%;
        }

        .navbar ul li {
            margin: 10px 0;
        }

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

        .card-container {
            padding: 60px 30px;
        }
    }

    @media (max-width: 1024px) {
        .hero-content h1 {
            font-size: 40px;
        }

        .card-container {
            padding: 80px 40px;
        }
    }

    @media (max-width: 1200px) {
        .navbar {
            padding: 15px 40px;
        }

        .card-container {
            padding: 90px 45px;
        }
    }

    @media (min-width: 1440px) {
        .hero-content h1 {
            font-size: 60px;
        }

        .card-container {
            padding: 120px 60px;
        }
    }