/* ========== 页面跳转遮罩层（共用） ========== */
.page-overlay {
    position: fixed;
    inset: 0;
    background: rgba(255, 255, 255, 0.92);
    z-index: 9999;
    display: none;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}
.page-overlay.show {
    display: flex;
}
.page-overlay-spinner {
    width: 28px;
    height: 28px;
    border: 3px solid #e0e0e0;
    border-top-color: #2ecc71;
    border-radius: 50%;
    animation: overlay-spin 0.7s linear infinite;
    margin-bottom: 14px;
}
@keyframes overlay-spin {
    to { transform: rotate(360deg); }
}
.page-overlay-text {
    color: #2ecc71;
    font-size: 14px;
    letter-spacing: 4px;
}