/* 通用字体和基础样式 */
    body {
        margin: 0;
        padding: 0;
        font-family: 'Poppins', 'Inter', sans-serif;
        background: linear-gradient(135deg, #0A192F, #4FC3F7, #8E44AD);
        color: #FFFFFF;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: flex-start;
        min-height: 100vh;
        background-attachment: fixed;
        animation: backgroundMove 20s ease infinite;
    }

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

    header {
        width: 100%;
        padding: 20px;
        background: rgba(10, 25, 47, 0.8);
        backdrop-filter: blur(10px);
        display: flex;
        justify-content: space-between;
        align-items: center;
        box-shadow: 0 2px 4px rgba(0,0,0,0.1);
        position: fixed;
        top: 0;
        z-index: 1000;
    }

    header .logo {
        font-size: 24px;
        font-weight: bold;
        color: #4FC3F7;
    }

    nav ul {
        list-style: none;
        display: flex;
        gap: 15px;
        margin: 0;
        padding: 0;
    }

    nav ul li a {
        text-decoration: none;
        color: #FFFFFF;
        font-weight: 500;
        transition: color 0.3s ease;
    }

    nav ul li a:hover {
        color: #8E44AD;
    }

    .main-content {
        padding: 100px 20px 20px 20px;
        max-width: 1200px;
        width: 100%;
        display: flex;
        flex-direction: column;
        gap: 40px;
    }

    .section-title {
        font-size: 32px;
        color: #4FC3F7;
        text-align: center;
        margin-bottom: 20px;
    }

    .card-container {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        gap: 20px;
    }

    .card {
        background: rgba(79, 195, 247, 0.3);
        backdrop-filter: blur(10px);
        border-radius: 15px;
        padding: 20px;
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
        transition: transform 0.3s ease, box-shadow 0.3s ease;
    }

    .card:hover {
        transform: translateY(-10px);
        box-shadow: 0 8px 16px rgba(0, 0, 0, 0.3);
    }

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

    .card h3 {
        margin-top: 15px;
        color: #FFFFFF;
    }

    .card p {
        margin-top: 10px;
        line-height: 1.6;
    }

    .article-section {
        background: rgba(14, 18, 48, 0.8);
        padding: 30px;
        border-radius: 15px;
        backdrop-filter: blur(10px);
        box-shadow: 0 4px 8px rgba(0,0,0,0.2);
    }

    .article-section h2 {
        color: #4FC3F7;
        margin-bottom: 20px;
    }

    .article-section h3 {
        color: #8E44AD;
        margin-top: 20px;
    }

    .article-section p {
        margin-top: 10px;
        line-height: 1.8;
        color: #FFFFFF;
    }

    .article-section pre {
        background: rgba(255, 255, 255, 0.1);
        padding: 15px;
        border-radius: 10px;
        overflow-x: auto;
        color: #00FFFC;
    }

    footer {
        width: 100%;
        padding: 20px;
        background: rgba(10, 25, 47, 0.8);
        backdrop-filter: blur(10px);
        text-align: center;
        color: #FFFFFF;
        position: relative;
        bottom: 0;
    }

    .notification {
        position: fixed;
        bottom: 20px;
        left: 50%;
        transform: translateX(-50%);
        background: rgba(142, 68, 173, 0.9);
        padding: 10px 20px;
        border-radius: 20px;
        color: #FFFFFF;
        font-size: 14px;
        box-shadow: 0 2px 4px rgba(0,0,0,0.2);
    }

    /* 响应式设计 */
    @media (max-width: 1440px) {
        .section-title {
            font-size: 28px;
        }
    }

    @media (max-width: 1200px) {
        .section-title {
            font-size: 26px;
        }
    }

    @media (max-width: 1024px) {
        .card-container {
            grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
        }
    }

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

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

        .main-content {
            padding: 80px 10px 10px 10px;
        }

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

    @media (max-width: 480px) {
        .section-title {
            font-size: 20px;
        }

        .card {
            padding: 15px;
        }

        .article-section {
            padding: 20px;
        }
    }

    @media (max-width: 320px) {
        .section-title {
            font-size: 18px;
        }

        .card {
            padding: 10px;
        }
    }

    /* 动画效果 */
    .button {
        background-color: #4FC3F7;
        color: white;
        padding: 10px 20px;
        border: none;
        border-radius: 25px;
        cursor: pointer;
        transition: all 0.3s ease;
        font-size: 16px;
    }

    .button:hover {
        background-color: #0A192F;
        color: #4FC3F7;
    }

    .particles-bg {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        z-index: -1;
    }

    /* 视觉增强 */
    .gradient-border {
        border: 2px solid;
        border-image-slice: 1;
        border-width: 2px;
        border-radius: 10px;
        border-image-source: linear-gradient(45deg, #4FC3F7, #8E44AD);
    }