/* 全局样式 */
    :root {
        --primary-color: #0A2647; /* 深蓝色 */
        --secondary-color: #3F72AF; /* 电光蓝 */
        --accent-color: #C94BFF; /* 霓虹紫 */
        --text-color: #FFFFFF; /* 白色 */
        --background-color: #1B1B2F; /* 深色背景 */
        --light-gray: #F5F5F5; /* 浅灰色 */
        --transition-speed: 0.3s;
        --font-family: 'Roboto', sans-serif;
    }

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

    body {
        font-family: var(--font-family);
        background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
        color: var(--text-color);
        line-height: 1.6;
        padding: 20px;
    }

    header {
        text-align: center;
        padding: 50px 20px;
        background: radial-gradient(circle, var(--accent-color), transparent);
        animation: aurora-move 15s linear infinite;
    }

    header h1 {
        font-size: 3em;
        margin-bottom: 20px;
        color: var(--light-gray);
    }

    header p {
        font-size: 1.2em;
        color: #D1D1D1;
    }

    main {
        max-width: 1200px;
        margin: 0 auto;
        padding: 20px;
        background: rgba(27, 27, 47, 0.9);
        border-radius: 10px;
        box-shadow: 0 8px 16px rgba(0, 0, 0, 0.3);
    }

    article {
        margin-bottom: 40px;
    }

    article h2 {
        font-size: 2.5em;
        color: var(--secondary-color);
        margin-bottom: 20px;
    }

    article h3 {
        font-size: 1.8em;
        color: var(--accent-color);
        margin: 20px 0 10px;
    }

    article p {
        font-size: 1em;
        color: #E0E0E0;
        margin-bottom: 15px;
    }

    article pre {
        background: #2E2E3A;
        padding: 15px;
        border-radius: 5px;
        overflow-x: auto;
        margin-bottom: 20px;
    }

    article code {
        color: #FFD700;
        font-family: 'Courier New', Courier, monospace;
    }

    .module {
        padding: 20px;
        margin-bottom: 20px;
        background: rgba(63, 114, 175, 0.1);
        border-radius: 8px;
        transition: background 0.3s ease;
    }

    .module:hover {
        background: rgba(63, 114, 175, 0.2);
    }

    .button {
        display: inline-block;
        padding: 10px 20px;
        background: var(--secondary-color);
        color: var(--text-color);
        border: none;
        border-radius: 5px;
        cursor: pointer;
        transition: transform var(--transition-speed) ease-in-out, background var(--transition-speed) ease;
        text-decoration: none;
    }

    .button:hover {
        transform: scale(1.05);
        background: var(--accent-color);
    }

    .button:active {
        transform: scale(0.95);
    }

    .progress-bar {
        width: 100%;
        height: 20px;
        background-color: #eee;
        border-radius: 10px;
        overflow: hidden;
        margin-bottom: 20px;
    }

    .progress-bar-fill {
        height: 100%;
        background-color: var(--secondary-color);
        width: 0;
        animation: fill-progress 2s forwards;
    }

    @keyframes fill-progress {
        from {
            width: 0;
        }
        to {
            width: 80%;
        }
    }

    .icon-circle {
        width: 60px;
        height: 60px;
        background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
        margin-bottom: 20px;
    }

    .icon-circle i {
        color: var(--text-color);
        font-size: 24px;
    }

    .responsive-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 20px;
    }

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

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

    /* 响应式设计 */
    @media (max-width: 1440px) {
        header h1 {
            font-size: 2.5em;
        }

        article h2 {
            font-size: 2em;
        }

        article h3 {
            font-size: 1.6em;
        }
    }

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

        .icon-circle {
            width: 50px;
            height: 50px;
        }
    }

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

        article h2 {
            font-size: 2.2em;
        }
    }

    @media (max-width: 768px) {
        .responsive-grid {
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        }

        article h3 {
            font-size: 1.4em;
        }
    }

    @media (max-width: 480px) {
        header h1 {
            font-size: 2em;
        }

        .button {
            padding: 8px 16px;
            font-size: 0.9em;
        }

        .icon-circle {
            width: 40px;
            height: 40px;
        }
    }

    @media (max-width: 320px) {
        body {
            padding: 10px;
        }

        header h1 {
            font-size: 1.8em;
        }

        article h2 {
            font-size: 1.8em;
        }

        article h3 {
            font-size: 1.2em;
        }

        .button {
            padding: 6px 12px;
            font-size: 0.8em;
        }
    }

    /* 滚动条样式 */
    ::-webkit-scrollbar {
        width: 8px;
    }

    ::-webkit-scrollbar-track {
        background: #1B1B2F;
    }

    ::-webkit-scrollbar-thumb {
        background: var(--secondary-color);
        border-radius: 4px;
    }

    ::-webkit-scrollbar-thumb:hover {
        background: var(--accent-color);
    }

    /* 代码块样式 */
    pre {
        background: #2E2E3A;
        padding: 15px;
        border-radius: 5px;
        overflow-x: auto;
    }

    code {
        color: #FFD700;
        font-family: 'Courier New', Courier, monospace;
    }

    /* 通知栏 */
    .notification {
        position: fixed;
        top: 20px;
        right: 20px;
        background: var(--secondary-color);
        color: var(--text-color);
        padding: 10px 20px;
        border-radius: 5px;
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
        animation: shake 0.5s ease-in-out;
    }

    @keyframes shake {
        0% { transform: translateX(0); }
        25% { transform: translateX(-5px); }
        50% { transform: translateX(5px); }
        75% { transform: translateX(-5px); }
        100% { transform: translateX(0); }
    }