body {
            font-family: "Helvetica Neue", Helvetica, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "微软雅黑", Arial, sans-serif;


        }


        .certificate-item {
            text-align: center;
            margin: 1rem;
            padding: 1rem;
            border: 2px solid #000;
            border-radius: 10px;
            flex: 1;
            min-width: 200px;
        }


        .phone-number {
            color: transparent;
            cursor: pointer;
        }

        .bg-gray-800 {
            transition: transform 0.3s ease;
            opacity: 0;
            visibility: hidden;
            position: absolute;
        }

        .bg-gray-800.active {
            opacity: 1;
            visibility: visible;
            position: relative;
        }