/* 全局样式 */
    body {
        margin: 0;
        padding: 0;
        font-family: 'Roboto', sans-serif;
        background: radial-gradient(circle, rgba(0, 123, 255, 0.3), transparent);
        color: #333333;
        line-height: 1.6;
    }

    header {
        background: #007BFF;
        color: #ffffff;
        padding: 20px;
        text-align: center;
    }

    header h1 {
        margin: 0;
        font-size: 2.5em;
    }

    nav {
        display: flex;
        justify-content: center;
        background: #333333;
    }

    nav a {
        color: #ffffff;
        padding: 15px 20px;
        text-decoration: none;
        transition: background 0.3s ease;
    }

    nav a:hover {
        background: #FF9800;
    }

    .container {
        display: grid;
        grid-template-columns: 1fr 2fr 1fr;
        gap: 20px;
        padding: 20px;
    }

    .sidebar, .main, .extra {
        background: #FFFFFF;
        border: 1px solid #E0E0E0;
        padding: 20px;
        border-radius: 8px;
    }

    .sidebar img, .extra img {
        width: 100%;
        height: auto;
        border-radius: 4px;
        margin-bottom: 15px;
    }

    .main article {
        margin-bottom: 30px;
    }

    .main h2 {
        color: #007BFF;
        font-size: 2em;
        margin-bottom: 10px;
    }

    .main h3 {
        color: #FF9800;
        font-size: 1.5em;
        margin-top: 20px;
        margin-bottom: 10px;
    }

    .main pre {
        background: #f4f6f8;
        padding: 15px;
        border-radius: 5px;
        overflow-x: auto;
    }

    .main code {
        font-family: 'Courier New', Courier, monospace;
        color: #d63384;
    }

    .button {
        background-color: #FF9800;
        color: white;
        border: none;
        padding: 10px 20px;
        cursor: pointer;
        transition: background-color 0.3s ease, transform 0.3s ease;
        border-radius: 4px;
    }

    .button:hover {
        background-color: #FF5722;
        transform: scale(1.05);
    }

    .timeline {
        position: relative;
        padding: 20px 0;
    }

    .timeline::after {
        content: '';
        position: absolute;
        width: 4px;
        background: #007BFF;
        top: 0;
        bottom: 0;
        left: 50%;
        margin-left: -2px;
    }

    .timeline-item {
        padding: 20px;
        background: #FFFFFF;
        border: 1px solid #E0E0E0;
        border-radius: 8px;
        position: relative;
        width: 45%;
    }

    .timeline-item.left {
        left: 0;
    }

    .timeline-item.right {
        left: 55%;
    }

    .timeline-item::after {
        content: '';
        position: absolute;
        width: 20px;
        height: 20px;
        background: #FF9800;
        border-radius: 50%;
        top: 20px;
        right: -10px;
    }

    .timeline-item.right::after {
        left: -10px;
    }

    @media (max-width: 1200px) {
        .container {
            grid-template-columns: 1fr 2fr;
        }
        .extra {
            display: none;
        }
    }

    @media (max-width: 1024px) {
        .container {
            grid-template-columns: 1fr;
        }
        .timeline-item {
            width: 100%;
            left: 0;
        }
        .timeline::after {
            left: 20px;
        }
        .timeline-item::after {
            left: -10px;
        }
    }

    @media (max-width: 768px) {
        nav {
            flex-direction: column;
        }
        nav a {
            text-align: center;
            padding: 10px;
        }
        header h1 {
            font-size: 2em;
        }
    }

    @media (max-width: 480px) {
        header h1 {
            font-size: 1.5em;
        }
        .main h2 {
            font-size: 1.5em;
        }
        .main h3 {
            font-size: 1.2em;
        }
    }

    @media (max-width: 320px) {
        nav a {
            padding: 8px;
            font-size: 0.9em;
        }
        .button {
            padding: 8px 16px;
            font-size: 0.9em;
        }
    }

    /* 动画效果 */
    .aurora-move {
        background: radial-gradient(circle, rgb(255, 87, 34), transparent);
        animation: aurora 15s linear infinite;
    }

    @keyframes aurora {
        0% {
            transform: rotate(0deg);
        }
        100% {
            transform: rotate(360deg);
        }
    }

    /* 图标样式 */
    .icon-circle {
        width: 50px;
        height: 50px;
        background-color: #FF9800;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        color: white;
        font-size: 18px;
        font-weight: bold;
        margin-bottom: 10px;
    }

    /* 倒计时组件 */
    .countdown {
        display: flex;
        justify-content: center;
        align-items: center;
        font-size: 1.2em;
        color: #FF5722;
    }

    /* 交互式图表区域 */
    .chart {
        background: #f4f6f8;
        padding: 20px;
        border-radius: 8px;
        position: relative;
    }

    /* 提示文本 */
    .note {
        text-align: center;
        margin: 20px 0;
        font-size: 1em;
        color: #666666;
    }