code{
    font-family: 'Courier New', Courier, monospace;
}

.flexcards-container {
    display: flex;
    flex-wrap: wrap;
}

.flexcards-item {
    flex: 1 0 100%;
    text-align: center;
    padding: 10px;
    box-sizing: border-box;
    margin: 16px 0px;
}

@media (min-width: 1080px) {
    .flexcards-item {
        flex-basis: calc((100% - 96px) / 3);
        max-width: calc((100% - 96px) / 3);
        margin: 16px;
    }
}

.bd-outline {
    position: relative;
    border: 1px grey solid;
    border-radius: 5px;
}

.bd-corner {
    position: absolute;
    left: 0%;
    bottom: 0%;
    font-size: 1em;
    color: white;
    background-color: rgba(128, 128, 128, 0.7);
    z-index: 100;
    border-radius: 2px;
    cursor: pointer;
}

@keyframes flame-animation {
    0% {
        box-shadow: 0 0 1px 1px rgba(255, 165, 0, 0.5),
                   0 0 2px 2px rgba(255, 165, 0, 0.4),
                   0 0 30px 3px rgba(255, 165, 0, 0.3),
                   0 0 4px 4px rgba(255, 165, 0, 0.2),
                   0 0 5px 5px rgba(255, 165, 0, 0.1);
    }
    50% {
        box-shadow: 0 0 6px 6px rgba(255, 165, 0, 0.5),
                   0 0 6px 6px rgba(255, 165, 0, 0.4),
                   0 0 6px 6px rgba(255, 165, 0, 0.3),
                   0 0 6px 6px rgba(255, 165, 0, 0.2),
                   0 0 6px 6px rgba(255, 165, 0, 0.1);
    }
    100% {
        box-shadow: 0 0 1px 1px rgba(255, 165, 0, 0.5),
                   0 0 2px 2px rgba(255, 165, 0, 0.4),
                   0 0 3px 3px rgba(255, 165, 0, 0.3),
                   0 0 4px 4px rgba(255, 165, 0, 0.2),
                   0 0 5px 5px rgba(255, 165, 0, 0.1);
    }
}

.flame-border {
    position: relative;
    display: inline-block;
    animation: flame-animation 2s infinite;
}

.flame-border::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border: 2px solid rgba(255, 165, 0, 0.5);
    border-radius: 10px; /* 根据需要调整圆角大小 */
    box-shadow: 0 0 10px 10px rgba(255, 165, 0, 0.5),
                0 0 20px 20px rgba(255, 165, 0, 0.4),
                0 0 30px 30px rgba(255, 165, 0, 0.3),
                0 0 40px 40px rgba(255, 165, 0, 0.2),
                0 0 50px 50px rgba(255, 165, 0, 0.1);
    pointer-events: none; /* 确保边框不会影响鼠标事件 */
}