/* 全局样式 */
    @import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@700&family=Roboto&display=swap');

    * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
    }

    body {
        font-family: 'Roboto', sans-serif;
        background: linear-gradient(135deg, #6C5CE7, #1DD1A1);
        color: #ffffff;
        min-height: 100vh;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: flex-start;
        overflow-x: hidden;
    }

    header {
        width: 100%;
        padding: 20px;
        background: rgba(0, 0, 0, 0.5);
        position: fixed;
        top: 0;
        left: 0;
        z-index: 1000;
    }

    header nav {
        display: flex;
        justify-content: center;
        gap: 30px;
    }

    header nav a {
        color: #ffffff;
        text-decoration: none;
        font-family: 'Montserrat', sans-serif;
        font-size: 16px;
        position: relative;
        transition: color 0.3s ease;
    }

    header nav a::after {
        content: '';
        position: absolute;
        width: 0%;
        height: 2px;
        background: #ffffff;
        left: 0;
        bottom: -5px;
        transition: width 0.3s ease;
    }

    header nav a:hover::after {
        width: 100%;
    }

    main {
        width: 90%;
        max-width: 1200px;
        margin-top: 80px;
        display: grid;
        grid-template-columns: 1fr;
        gap: 40px;
    }

    section {
        background: rgba(255, 255, 255, 0.2);
        border-radius: 15px;
        padding: 30px;
        box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
        backdrop-filter: blur(10px);
    }

    section h2, section h3, section h4 {
        font-family: 'Montserrat', sans-serif;
        color: #ffffff;
        margin-bottom: 20px;
    }

    section p, section ul, section pre {
        font-family: 'Roboto', sans-serif;
        color: #f0f0f0;
        line-height: 1.6;
        margin-bottom: 15px;
    }

    section ul {
        list-style: inside disc;
    }

    .card {
        background: rgba(255, 255, 255, 0.1);
        border-radius: 10px;
        padding: 20px;
        box-shadow: 0px 4px 10px rgba(0, 0, 0, 0.2);
        margin-bottom: 20px;
    }

    pre {
        background: rgba(0, 0, 0, 0.7);
        padding: 15px;
        border-radius: 8px;
        overflow: auto;
    }

    code {
        font-family: 'Roboto', monospace;
        color: #00FFAA;
    }

    .image-gallery {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
        justify-content: center;
    }

    .image-gallery img {
        width: 100px;
        height: 100px;
        object-fit: cover;
        border-radius: 10px;
        transition: transform 0.3s ease;
    }

    .image-gallery img:hover {
        transform: scale(1.1);
    }

    .footer {
        width: 100%;
        padding: 20px;
        background: rgba(0, 0, 0, 0.5);
        text-align: center;
        position: fixed;
        bottom: 0;
        left: 0;
    }

    a {
        color: #1DD1A1;
        text-decoration: none;
    }

    a:hover {
        text-decoration: underline;
    }

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

    body {
        background-size: 200% 200%;
        animation: aurora-move 15s linear infinite;
    }

    .btn {
        display: inline-block;
        padding: 10px 20px;
        background: #1DD1A1;
        color: #ffffff;
        border: none;
        border-radius: 25px;
        cursor: pointer;
        transition: background 0.3s ease, transform 0.3s ease;
        position: relative;
        overflow: hidden;
    }

    .btn::after {
        content: '';
        position: absolute;
        width: 100%;
        height: 100%;
        top: 0;
        left: 0;
        background: rgba(255, 255, 255, 0.2);
        opacity: 0;
        transition: opacity 0.3s ease;
    }

    .btn:hover::after {
        opacity: 1;
    }

    .btn:hover {
        transform: scale(1.05);
    }

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

    @media (max-width: 1200px) {
        main {
            width: 80%;
        }
    }

    @media (max-width: 1024px) {
        main {
            width: 75%;
        }
    }

    @media (max-width: 768px) {
        header nav {
            flex-direction: column;
            gap: 15px;
        }

        section {
            padding: 20px;
        }

        .image-gallery img {
            width: 80px;
            height: 80px;
        }
    }

    @media (max-width: 480px) {
        header nav a {
            font-size: 14px;
        }

        main {
            width: 90%;
        }

        .image-gallery img {
            width: 60px;
            height: 60px;
        }
    }

    @media (max-width: 320px) {
        header nav a {
            font-size: 12px;
        }

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