body {
            margin: 0;
            padding: 0;
            overflow: hidden;
            background-color: #f0f0f0;
            font-family: "Microsoft YaHei", sans-serif;
            height: 100vh;
        }
        .number-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
            grid-auto-rows: 30px;
            gap: 10px;
            padding: 20px;
            width: 100%;
            height: 100%;
color:#b3b6b0;
        }
        .number {
            font-size: 20px;
            opacity: 0.7;
            text-align: center;
            line-height: 30px;
        }
        .main-number {
            position: fixed;
            top: 40%;
            left: 50%;
            transform: translate(-50%, -50%);
            font-size: 268px;
            font-weight: bold;
            opacity: 0.6;
            z-index: 100;
            display: flex;
            justify-content: center;
            align-items: center;
        }
        .main-number span {
            display: inline-block;
        }
        .refresh-btn {
position: fixed;
    bottom: 300px;
    left: 50%;
    transform: translateX(-50%);
    padding: 50px 30px;
    font-size: 80px;
    background-color: #4CAF50;
    color: white;
    border: none;
    width: 100%;
    cursor: pointer;
    z-index: 101;
        }
        .refresh-btn:disabled {
            background-color: #cccccc;
            cursor: not-allowed;
        }
        .time-display {
            position: fixed;
            bottom: 120px;
            left: 50%;
            color:#b3b6b0;
            transform: translateX(-50%);
            font-size: 38px;
            z-index: 101;

            padding: 5px 15px;
            border-radius: 5px;
        }
        .time-display2 {
            position: fixed;
            bottom: 30px;
            left: 50%;
            color:#b3b6b0;
            transform: translateX(-50%);
            font-size: 18px;
            z-index: 101;
            text-decoration: none;
            padding: 5px 15px;
            border-radius: 5px;
        }