/* 基础样式 */
    body {
        margin: 0;
        padding: 0;
        font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
        background: linear-gradient(135deg, #1e3c72, #2a5298);
        color: #ffffff;
        line-height: 1.6;
    }

    h1, h2, h3, h4, h5, h6 {
        font-family: 'Roboto', sans-serif;
        color: #ffffff;
        margin-bottom: 20px;
    }

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

    a {
        color: #00eaff;
        text-decoration: none;
    }

    a:hover {
        text-decoration: underline;
    }

    /* 容器 */
    .container {
        width: 90%;
        max-width: 1200px;
        margin: 0 auto;
        padding: 20px;
    }

    /* 头部样式 */
    header {
        background: rgba(0, 0, 0, 0.5);
        padding: 40px 0;
        text-align: center;
        position: relative;
        z-index: 2;
    }

    header h1 {
        font-size: 2.5rem;
        margin: 0;
        animation: fadeInDown 1s ease-out;
    }

    /* 渐变按钮 */
    .btn-gradient {
        display: inline-block;
        padding: 10px 20px;
        margin-top: 20px;
        background: linear-gradient(45deg, #6a11cb, #2575fc);
        border: none;
        border-radius: 25px;
        color: #fff;
        font-size: 1rem;
        cursor: pointer;
        transition: background 0.3s ease;
    }

    .btn-gradient:hover {
        background: linear-gradient(45deg, #2575fc, #6a11cb);
    }

    /* 视差滚动部分 */
    .parallax-section {
        position: relative;
        background-attachment: fixed;
        background-size: cover;
        background-position: center;
        height: 500px;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .parallax-overlay {
        background: rgba(0, 0, 0, 0.4);
        width: 100%;
        height: 100%;
        position: absolute;
        top: 0;
        left: 0;
        z-index: 1;
    }

    .parallax-content {
        position: relative;
        z-index: 2;
        text-align: center;
        color: #fff;
    }

    /* 卡片布局 */
    .card-grid {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        gap: 20px;
        margin: 40px 0;
    }

    .card {
        background: rgba(255, 255, 255, 0.1);
        border-radius: 10px;
        padding: 20px;
        box-shadow: 0 4px 6px rgba(0,0,0,0.1);
        transition: transform 0.3s ease, box-shadow 0.3s ease;
    }

    .card:hover {
        transform: translateY(-10px);
        box-shadow: 0 10px 15px rgba(0,0,0,0.2);
    }

    .card img {
        width: 100%;
        border-radius: 10px;
        margin-bottom: 15px;
    }

    .card h3 {
        margin-top: 0;
    }

    /* 文章样式 */
    .sample-article {
        background: rgba(0, 0, 0, 0.6);
        padding: 30px;
        border-radius: 10px;
        margin: 40px 0;
    }

    .sample-article h2 {
        font-size: 2rem;
        margin-bottom: 20px;
        text-align: center;
    }

    .sample-article pre {
        background: #2a2a2a;
        padding: 15px;
        border-radius: 5px;
        overflow-x: auto;
        font-family: 'Courier New', Courier, monospace;
        margin-bottom: 15px;
    }

    .sample-article code {
        color: #ffcc00;
    }

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

    /* 响应式设计 */
    @media (max-width: 1440px) {
        header h1 {
            font-size: 2.2rem;
        }
        .btn-gradient {
            font-size: 0.9rem;
        }
    }

    @media (max-width: 1200px) {
        .container {
            width: 95%;
        }
        .parallax-section {
            height: 400px;
        }
    }

    @media (max-width: 1024px) {
        header h1 {
            font-size: 2rem;
        }
        .parallax-section {
            height: 350px;
        }
    }

    @media (max-width: 768px) {
        header h1 {
            font-size: 1.8rem;
        }
        .card-grid {
            grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
        }
    }

    @media (max-width: 480px) {
        header h1 {
            font-size: 1.5rem;
        }
        .parallax-section {
            height: 300px;
        }
    }

    @media (max-width: 320px) {
        header h1 {
            font-size: 1.2rem;
        }
        .parallax-section {
            height: 250px;
        }
    }

    /* 装饰性图片 */
    .decorative-images {
        position: absolute;
        top: 10px;
        right: 10px;
        display: flex;
        gap: 10px;
        z-index: 3;
    }

    .decorative-images img {
        width: 50px;
        height: 50px;
        border-radius: 50%;
        animation: float 6s ease-in-out infinite;
    }

    @keyframes float {
        0% {
            transform: translateY(0);
        }
        50% {
            transform: translateY(-15px);
        }
        100% {
            transform: translateY(0);
        }
    }