/* 全局样式 */
    :root {
        --primary-color: #0A1F44;
        --secondary-color: #E8F3FF;
        --accent-color: #FF6B35;
        --highlight-color: #7B61FF;
        --background-gradient: linear-gradient(135deg, #0A1F44, #E8F3FF);
        --font-primary: 'Montserrat', 'Roboto', sans-serif;
        --font-secondary: 'Roboto', sans-serif;
        --transition-speed: 0.3s;
    }

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

    body {
        font-family: var(--font-primary);
        line-height: 1.6;
        background: var(--background-gradient);
        color: var(--secondary-color);
        overflow-x: hidden;
    }

    a {
        color: var(--highlight-color);
        text-decoration: none;
    }

    a[rel="nofollow"]::after {
        content: "";
    }

    header {
        position: fixed;
        top: 0;
        width: 100%;
        background: rgba(10, 31, 68, 0.9);
        padding: 20px 40px;
        display: flex;
        justify-content: space-between;
        align-items: center;
        z-index: 1000;
        box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    }

    header h1 {
        font-size: 1.5em;
        color: var(--secondary-color);
        font-weight: bold;
    }

    nav ul {
        list-style: none;
        display: flex;
        gap: 20px;
    }

    nav ul li a {
        color: var(--secondary-color);
        font-weight: 500;
        transition: color var(--transition-speed);
    }

    nav ul li a:hover {
        color: var(--highlight-color);
    }

    main {
        padding: 100px 20px 50px;
        max-width: 1200px;
        margin: 0 auto;
    }

    .section-title {
        font-size: 2em;
        margin-bottom: 20px;
        color: var(--primary-color);
        text-align: center;
        font-weight: bold;
        text-shadow: 2px 2px 4px rgba(123, 97, 255, 0.5);
    }

    article {
        background: rgba(255, 255, 255, 0.1);
        padding: 30px;
        border-radius: 10px;
        box-shadow: 0 4px 10px rgba(0,0,0,0.2);
        backdrop-filter: blur(10px);
    }

    article h2, article h3, article h4 {
        color: var(--secondary-color);
        margin-bottom: 15px;
    }

    article h2 {
        font-size: 2em;
        border-bottom: 2px solid var(--accent-color);
        padding-bottom: 10px;
    }

    article h3 {
        font-size: 1.5em;
        margin-top: 20px;
    }

    article h4 {
        font-size: 1.2em;
        margin-top: 15px;
    }

    article p {
        margin-bottom: 15px;
        text-align: justify;
        color: var(--secondary-color);
    }

    article pre {
        background: rgba(255, 255, 255, 0.2);
        padding: 15px;
        border-radius: 5px;
        overflow-x: auto;
        margin-bottom: 15px;
    }

    article code {
        font-family: 'Roboto Mono', monospace;
        color: #FFD700;
    }

    article ul, article ol {
        margin-left: 20px;
        margin-bottom: 15px;
    }

    article table {
        width: 100%;
        border-collapse: collapse;
        margin-bottom: 15px;
    }

    article table, article th, article td {
        border: 1px solid var(--secondary-color);
    }

    article th, article td {
        padding: 10px;
        text-align: left;
    }

    .sample-data {
        background: rgba(123, 97, 255, 0.1);
        padding: 20px;
        border-radius: 10px;
        margin-top: 30px;
    }

    .sample-data h3 {
        font-size: 1.5em;
        color: var(--accent-color);
        margin-bottom: 15px;
        text-align: center;
    }

    .sample-data ul {
        list-style: disc inside;
        color: var(--secondary-color);
    }

    .images-gallery {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: 15px;
        margin-top: 20px;
    }

    .images-gallery img {
        width: 100%;
        height: auto;
        border-radius: 5px;
        transition: transform var(--transition-speed);
    }

    .images-gallery img:hover {
        transform: scale(1.05);
    }

    .footer {
        background: rgba(10, 31, 68, 0.9);
        color: var(--secondary-color);
        text-align: center;
        padding: 20px;
        position: relative;
        bottom: 0;
        width: 100%;
        box-shadow: 0 -2px 5px rgba(0,0,0,0.1);
    }

    .ripple {
        position: relative;
        overflow: hidden;
    }

    .ripple::after {
        content: '';
        position: absolute;
        top: 50%;
        left: 50%;
        width: 0;
        height: 0;
        background: rgba(255, 255, 255, 0.5);
        border-radius: 50%;
        transform: translate(-50%, -50%);
        transition: width 0.5s ease, height 0.5s ease, opacity 1s ease;
        opacity: 0;
    }

    .ripple:active::after {
        width: 200px;
        height: 200px;
        opacity: 1;
        transition: 0s;
    }

    @keyframes fadeInUp {
        from {
            opacity: 0;
            transform: translateY(20px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    .fade-in {
        opacity: 0;
        transform: translateY(20px);
        animation: fadeInUp 1s forwards;
    }

    .fade-in.active {
        opacity: 1;
        transform: translateY(0);
    }

    /* 响应式设计 */
    @media (max-width: 1440px) {
        header {
            padding: 15px 30px;
        }

        .section-title {
            font-size: 1.8em;
        }
    }

    @media (max-width: 1200px) {
        main {
            padding: 90px 15px 40px;
        }

        .section-title {
            font-size: 1.6em;
        }
    }

    @media (max-width: 1024px) {
        header h1 {
            font-size: 1.3em;
        }

        nav ul {
            gap: 15px;
        }

        .section-title {
            font-size: 1.4em;
        }
    }

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

        nav ul {
            flex-direction: column;
            gap: 10px;
            width: 100%;
        }

        .images-gallery {
            grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
        }

        .section-title {
            font-size: 1.3em;
        }
    }

    @media (max-width: 480px) {
        header {
            padding: 10px 20px;
        }

        nav ul {
            gap: 8px;
        }

        .section-title {
            font-size: 1.2em;
        }

        article {
            padding: 20px;
        }

        .sample-data h3 {
            font-size: 1.3em;
        }
    }

    @media (max-width: 320px) {
        header h1 {
            font-size: 1em;
        }

        nav ul {
            gap: 5px;
        }

        .section-title {
            font-size: 1em;
        }

        article {
            padding: 15px;
        }
    }