.tile {
    perspective: 1000px;
    width: 60px;
    height: 90px;
    transition: all 0.3s ease;
}

.tile-inner {
    position: relative;
    width: 100%;
    height: 100%;
    text-align: center;
    transition: transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
    transform-style: preserve-3d;
    -webkit-transform-style: preserve-3d;
}

.tile.revealed .tile-inner {
    transform: rotateY(180deg);
    -webkit-transform: rotateY(180deg);
}

.tile-front,
.tile-back {
    position: absolute;
    inset: 0;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: bold;
    box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1);
}

/* 牌面（数值） - 默认在背面（旋转180度） */
.tile-front {
    background: #f8fafc;
    color: #1e293b;
    transform: rotateY(180deg);
    -webkit-transform: rotateY(180deg);
    border: 2px solid #e2e8f0;
    z-index: 1;
}

/* 牌背（图案） - 默认在正面 */
.tile-back {
    background: #334155;
    color: white;
    transform: rotateY(0deg);
    -webkit-transform: rotateY(0deg);
    border: 2px solid #475569;
    z-index: 2;
}

/* 翻开后，调整 z-index 确保正面在上 */
.tile.revealed .tile-front {
    z-index: 2;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.tile.revealed .tile-back {
    z-index: 1;
}

/* 被翻开的牌样式：简化为绿色边框 */
.tile.revealed {
    transform: translateY(-2px);
    /* 极轻微浮起 */
    opacity: 1 !important;
    z-index: 10 !important;
}

.tile.revealed .tile-front,
.tile.revealed .tile-back {
    border: 2px solid #22c55e !important;
    /* 调细为 2px */
    box-shadow: 0 0 10px rgba(34, 197, 94, 0.2);
    box-sizing: border-box;
    /* 确保边框不影响大小 */
}

.tile.revealed.tile-black .tile-front {
    background: #0f172a;
    color: #ffffff;
    border-color: #22c55e !important;
}

.tile.revealed.tile-white .tile-front {
    background: #ffffff;
    color: #0f172a;
    border-color: #22c55e !important;
}

/* 统一翻开后的数字大小 */
.tile.revealed {
    transform: none;
}

.tile.revealed .tile-front {
    font-size: 2.5rem;
}

/* 刚被猜中时的闪烁动画 */
@keyframes reveal-pulse {
    0% {
        transform: scale(1);
        box-shadow: 0 0 0 0px rgba(34, 197, 94, 0.7);
    }

    50% {
        transform: scale(1.1);
        box-shadow: 0 0 20px 10px rgba(34, 197, 94, 0.4);
    }

    100% {
        transform: scale(1);
        box-shadow: 0 0 0 0px rgba(34, 197, 94, 0);
    }
}

.revealed-new {
    animation: reveal-pulse 1.5s ease-out infinite;
    z-index: 10 !important;
}

.tile-black .tile-back {
    background: #0f172a;
    border-color: #1e293b;
}

.tile-white .tile-back {
    background: #f1f5f9;
    color: #64748b;
    border-color: #cbd5e1;
}

.tile-black .tile-front {
    border-color: #0f172a;
}

.tile-white .tile-front {
    border-color: #cbd5e1;
}

.current-turn {
    box-shadow: 0 0 0 4px rgba(249, 115, 22, 0.4);
    border-radius: 12px;
}

/* 刚摸到的牌（待定牌）的高亮样式 - 使用亮橘色框起来 */
.tile.special {
    transform: scale(1.05);
    /* 去掉 translateY(-8px) */
    z-index: 20;
}

.tile.special .tile-front,
.tile.special .tile-back {
    border: 3px solid #f97316 !important;
    box-shadow: 0 0 15px rgba(249, 115, 22, 0.6);
}