/* 基础样式 */
    body {
        margin: 0;
        padding: 0;
        background: linear-gradient(135deg, #0A0A0A, #1E2D5E);
        color: #FFFFFF;
        font-family: 'Roboto', sans-serif;
        line-height: 1.6;
    }

    /* 头部样式 */
    header {
        position: fixed;
        top: 0;
        width: 100%;
        background: rgba(10, 10, 10, 0.9);
        padding: 20px 0;
        z-index: 1000;
    }

    header .container {
        width: 90%;
        max-width: 1200px;
        margin: 0 auto;
        display: flex;
        justify-content: space-between;
        align-items: center;
    }

    header h1 {
        font-family: 'Orbitron', sans-serif;
        font-size: 24px;
        color: #6F00FF;
    }

    nav ul {
        list-style: none;
        display: flex;
        gap: 15px;
    }

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

    nav a:hover {
        color: #6F00FF;
    }

    /* 主体内容样式 */
    .container {
        width: 90%;
        max-width: 1200px;
        margin: 100px auto 50px;
    }

    section {
        margin-bottom: 60px;
        padding: 40px 20px;
        background: rgba(30, 45, 94, 0.8);
        border-radius: 10px;
        box-shadow: 0 4px 15px rgba(0,0,0,0.3);
    }

    section h2 {
        font-family: 'Orbitron', sans-serif;
        font-size: 32px;
        color: #6F00FF;
        margin-bottom: 20px;
        text-align: center;
    }

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

    .card-item {
        background: #1E2D5E;
        border-radius: 8px;
        overflow: hidden;
        width: 300px;
        box-shadow: 0 2px 10px rgba(0,0,0,0.2);
        transition: transform 0.3s, box-shadow 0.3s;
    }

    .card-item:hover {
        transform: translateY(-10px);
        box-shadow: 0 4px 20px rgba(0,0,0,0.4);
    }

    .card-item img {
        width: 100%;
        height: auto;
    }

    .card-item .content {
        padding: 15px;
    }

    .card-item .content h3 {
        font-family: 'Orbitron', sans-serif;
        font-size: 20px;
        color: #FF7F00;
        margin-bottom: 10px;
    }

    .card-item .content p {
        font-family: 'Poppins', sans-serif;
        font-size: 16px;
        color: #FFFFFF;
    }

    /* 示例展示样式 */
    .sample-display {
        background: rgba(255, 255, 255, 0.1);
        padding: 30px;
        border-radius: 10px;
        position: relative;
    }

    .sample-display::before {
        content: "示例展示";
        position: absolute;
        top: -15px;
        left: 20px;
        background: #FF7F00;
        color: #FFFFFF;
        padding: 5px 10px;
        border-radius: 5px;
        font-family: 'Orbitron', sans-serif;
    }

    .sample-display article {
        max-height: 600px;
        overflow-y: auto;
        padding-right: 10px;
    }

    .sample-display pre {
        background: #0A0A0A;
        padding: 15px;
        border-radius: 5px;
        overflow-x: auto;
    }

    .sample-display code {
        color: #00FF00;
        font-family: 'Courier New', Courier, monospace;
    }

    /* 按钮样式 */
    .button {
        display: inline-block;
        background-color: #FF7F00;
        color: #FFFFFF;
        padding: 10px 20px;
        border: none;
        border-radius: 5px;
        cursor: pointer;
        font-family: 'Poppins', sans-serif;
        transition: transform 0.3s, background-color 0.3s;
        text-decoration: none;
    }

    .button:hover {
        transform: rotate(5deg);
        background-color: #6F00FF;
    }

    /* 底部样式 */
    footer {
        background: rgba(10, 10, 10, 0.9);
        color: #FFFFFF;
        text-align: center;
        padding: 20px 0;
        font-family: 'Poppins', sans-serif;
        position: relative;
    }

    footer::before {
        content: "这是一个网页样式设计参考";
        position: absolute;
        top: -20px;
        left: 50%;
        transform: translateX(-50%);
        background: #6F00FF;
        padding: 5px 10px;
        border-radius: 5px;
        font-size: 14px;
    }

    /* 响应式设计 */
    @media (max-width: 1440px) {
        .container {
            width: 85%;
        }
    }

    @media (max-width: 1200px) {
        header .container {
            flex-direction: column;
        }

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

        .card {
            flex-direction: column;
        }
    }

    @media (max-width: 1024px) {
        section {
            padding: 30px 15px;
        }

        .card-item {
            width: 100%;
        }
    }

    @media (max-width: 768px) {
        header h1 {
            font-size: 20px;
        }

        section h2 {
            font-size: 28px;
        }

        .card-item {
            width: 100%;
        }
    }

    @media (max-width: 480px) {
        header .container {
            flex-direction: column;
        }

        nav ul {
            flex-direction: column;
        }

        section h2 {
            font-size: 24px;
        }

        .card-item .content h3 {
            font-size: 18px;
        }

        .button {
            padding: 8px 16px;
            font-size: 14px;
        }
    }

    @media (max-width: 320px) {
        header h1 {
            font-size: 18px;
        }

        section h2 {
            font-size: 20px;
        }

        .card-item .content h3 {
            font-size: 16px;
        }

        .card-item .content p {
            font-size: 14px;
        }

        .button {
            padding: 6px 12px;
            font-size: 12px;
        }
    }