html, body {
    margin: 0;
    padding: 0;
    height: 100%;
    font-family: Arial, sans-serif;
    background-color: #f5f5f5;
}

.container-wrapper {
    position: relative;
    width: 100%;
    height: 100%;
}

iframe {
    border: none;
    width: 100%;
    height: 100%;
    display: none;
}

.loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: white;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

.spinner {
    border: 8px solid #f3f3f3;
    border-top: 8px solid #3498db;
    border-radius: 50%;
    width: 60px;
    height: 60px;
    animation: spin 1s linear infinite;
}

.message {
    text-align: center;
    margin-top: 20%;
    font-size: 1.5em;
    color: red;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

/* 超时提示 */
.timeout-message {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: #fff3cd;
    color: #856404;
    padding: 20px;
    border: 1px solid #ffeeba;
    border-radius: 5px;
    z-index: 10000;
    display: none;
}