/* ===== 游戏界面 ===== */
#game-screen {
    padding: 0;
    display: flex;
    flex-direction: column;
    background: var(--bg-primary);
}

/* iOS安全区适配 */
@supports (padding: max(0px)) {
    #game-screen {
        padding-left: env(safe-area-inset-left);
        padding-right: env(safe-area-inset-right);
        padding-bottom: env(safe-area-inset-bottom);
    }
    .action-bar {
        padding-bottom: max(12px, env(safe-area-inset-bottom)) !important;
    }
}

.game-table {
    flex: 1;
    position: relative;
    display: grid;
    contain: layout;
    grid-template-areas:
        ". top ."
        "left center right"
        ". bottom .";
    grid-template-columns: 110px 1fr 110px;
    grid-template-rows: 130px 1fr 220px;
    gap: 6px;
    padding: 10px;
    overflow: hidden;
    transition: font-size 0.3s ease;
}

/* 三人模式：移除对家，扩大中心区域 */
.game-table.three-player {
    grid-template-areas:
        "left center right"
        ". bottom .";
    grid-template-columns: 90px 1fr 90px;
    grid-template-rows: 1fr 180px;
}

.game-table.three-player .player-area.top {
    display: none !important;
}

.game-table.three-player .player-area.left {
    grid-area: left;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.game-table.three-player .player-area.right {
    grid-area: right;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.game-table.three-player .player-area.left .hand-area,
.game-table.three-player .player-area.right .hand-area {
    flex-direction: row;
    justify-content: center;
    align-items: center;
    flex-wrap: nowrap;
}

.game-table.three-player .player-area.left .melds-area,
.game-table.three-player .player-area.right .melds-area {
    flex-direction: row;
    justify-content: center;
    align-items: center;
}

/* 玩家区域 */
.player-area {
    display: flex;
    align-items: center;
    position: relative;
    contain: layout;
    transition: var(--transition);
}

.player-area.top {
    grid-area: top;
    flex-direction: column;
    justify-content: flex-start;
}

.player-area.left {
    grid-area: left;
    flex-direction: row;
    justify-content: flex-start;
}

.player-area.right {
    grid-area: right;
    flex-direction: row-reverse;
    justify-content: flex-start;
}

.player-area.bottom {
    grid-area: bottom;
    flex-direction: column-reverse;
    justify-content: flex-start;
}

.player-info {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    background: rgba(0, 0, 0, 0.35);
    border-radius: var(--border-radius-sm);
    font-size: 0.8rem;
    transition: var(--transition-fast);
    border: 1px solid transparent;
}

.player-avatar {
    font-size: 1.5rem;
    filter: drop-shadow(0 1px 2px rgba(0,0,0,0.3));
    transition: var(--transition-fast);
}

.player-name {
    color: var(--text-secondary);
    max-width: 70px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-weight: 500;
}

.player-score {
    color: var(--accent-gold);
    font-weight: 700;
    font-size: 0.95rem;
}

/* 当前回合高亮 */
.player-area.current-turn .player-info {
    border-color: var(--accent-gold);
    box-shadow: 0 0 0 2px rgba(212, 168, 67, 0.3), 0 0 15px rgba(212, 168, 67, 0.15);
    animation: turnPulse 2s ease-in-out infinite;
    background: rgba(0, 0, 0, 0.5);
}

.player-area.current-turn .player-avatar {
    animation: avatarBounce 1s ease-in-out infinite;
}

@keyframes turnPulse {
    0%, 100% { box-shadow: 0 0 0 2px rgba(212, 168, 67, 0.3), 0 0 15px rgba(212, 168, 67, 0.15); }
    50% { box-shadow: 0 0 0 3px rgba(212, 168, 67, 0.5), 0 0 25px rgba(212, 168, 67, 0.25); }
}

@keyframes avatarBounce {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.15); }
}

/* 手牌区域 */
.hand-area {
    display: flex;
    gap: 2px;
    padding: 4px;
    transition: var(--transition);
}

.player-area.top .hand-area {
    flex-direction: row;
    justify-content: center;
    flex-wrap: nowrap;
}

.player-area.left .hand-area {
    flex-direction: column;
    align-items: center;
    flex-wrap: nowrap;
}

.player-area.right .hand-area {
    flex-direction: column;
    align-items: center;
    flex-wrap: nowrap;
}

.player-area.bottom .hand-area {
    flex-direction: row;
    justify-content: center;
    flex-wrap: nowrap;
    overflow-x: auto;
    overflow-y: hidden;
    scrollbar-width: none;
    -ms-overflow-style: none;
    padding-bottom: 8px;
    max-width: 100%;
    width: 100%;
}

.player-area.bottom .hand-area::-webkit-scrollbar {
    display: none;
}

.shanten-hud {
    position: absolute;
    bottom: 110px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--hud-bg);
    border: 1px solid var(--hud-border);
    border-radius: var(--border-radius);
    padding: 4px 12px;
    font-size: 0.85rem;
    color: var(--accent-gold);
    z-index: 10;
    pointer-events: none;
}
.shanten-hud.hidden { display: none; }

/* ===== 真实大号牌面系统 ===== */

/* 麻将牌基础 - 高对比度深色主题 */
.mahjong-tile {
    width: 64px;
    height: 88px;
    will-change: transform;
    background: linear-gradient(
        180deg,
        #2d2d3d 0%,
        #252535 35%,
        #1e1e2e 65%,
        #181828 100%
    );
    border: 2px solid #4a4a5a;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition:
        transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1),
        box-shadow 0.2s ease,
        border-color 0.2s ease,
        filter 0.2s ease;
    user-select: none;
    position: relative;
    box-shadow:
        0 4px 12px rgba(0, 0, 0, 0.4),
        inset 0 1px 0 rgba(255,255,255,0.08);
    transform-style: preserve-3d;
    backface-visibility: hidden;
    flex-shrink: 0;
    color: #ffffff;
}

/* 牌面文字容器 */
.mahjong-tile .tile-face {
    font-size: 2.4rem;
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.6));
    z-index: 2;
    pointer-events: none;
    text-shadow: 0 0 8px rgba(255,255,255,0.15), 0 1px 2px rgba(0,0,0,0.5);
}

/* 牌面装饰线（高对比度版本） */
.mahjong-tile .tile-deco {
    position: absolute;
    left: 8%;
    width: 84%;
    height: 1px;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.12),
        rgba(255, 255, 255, 0.2),
        rgba(255, 255, 255, 0.12),
        transparent
    );
    pointer-events: none;
    z-index: 1;
}

.mahjong-tile .tile-deco-top {
    top: 6px;
}

.mahjong-tile .tile-deco-bottom {
    bottom: 6px;
}

/* 牌面底部微阴影 */
.mahjong-tile::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 4%;
    width: 92%;
    height: 35%;
    background: linear-gradient(180deg, transparent, rgba(0,0,0,0.04));
    border-radius: 0 0 5px 5px;
    pointer-events: none;
}

/* 花色色调 - 高对比度深色主题，每花色鲜明区分 */
.mahjong-tile.suit-wan {
    background: linear-gradient(180deg, #3d1f1f 0%, #2d1515 35%, #251010 65%, #1e0c0c 100%);
    border-color: #ff4444;
    color: #ff6b6b;
}

.mahjong-tile.suit-tong {
    background: linear-gradient(180deg, #1f3d1f 0%, #152d15 35%, #102510 65%, #0c1e0c 100%);
    border-color: #44ff44;
    color: #6bff6b;
}

.mahjong-tile.suit-tiao {
    background: linear-gradient(180deg, #1f1f3d 0%, #15152d 35%, #101025 65%, #0c0c1e 100%);
    border-color: #4488ff;
    color: #6ba3ff;
}

.mahjong-tile.suit-feng {
    background: linear-gradient(180deg, #2d1f3d 0%, #25152d 35%, #1e1025 65%, #150c1e 100%);
    border-color: #bb66ff;
    color: #d19aff;
}

.mahjong-tile.suit-jian {
    background: linear-gradient(180deg, #3d2d1f 0%, #2d2515 35%, #251e10 65%, #1e180c 100%);
    border-color: #ffcc44;
    color: #ffe066;
}

.mahjong-tile.suit-hua {
    background: linear-gradient(180deg, #3d1f2d 0%, #2d1525 35%, #25101e 65%, #1e0c18 100%);
    border-color: #ff66aa;
    color: #ff99cc;
}

/* 悬停效果 - 使用当前花色高亮（仅在支持精细指针的设备上生效） */
@media (hover: hover) and (pointer: fine) {
    .mahjong-tile:hover {
        transform: translateY(-8px) scale(1.06) rotateX(-3deg);
        box-shadow:
            0 10px 24px rgba(0, 0, 0, 0.4),
            0 0 0 2px currentColor,
            0 0 20px currentColor;
        z-index: 10;
        filter: brightness(1.2);
    }
}

/* 触摸设备：点击反馈 */
.mahjong-tile:active {
    transform: translateY(-4px) scale(1.03);
    filter: brightness(1.15);
}

/* 选中效果 - 使用当前花色发光 */
.mahjong-tile.selected {
    transform: translateY(-16px) scale(1.1) rotateX(-5deg);
    box-shadow:
        0 0 0 3px currentColor,
        0 0 30px currentColor,
        0 12px 28px rgba(0, 0, 0, 0.4);
    z-index: 20;
    animation: selectedGlow 1.5s ease-in-out infinite;
}

@keyframes selectedGlow {
    0%, 100% { box-shadow: 0 0 0 3px currentColor, 0 12px 28px rgba(0, 0, 0, 0.4); }
    50% { box-shadow: 0 0 0 3px currentColor, 0 12px 28px rgba(0, 0, 0, 0.4), 0 0 25px currentColor; }
}

/* 禁用状态（非玩家回合时） */
.mahjong-tile.disabled {
    pointer-events: none;
    opacity: 0.35;
    filter: grayscale(0.6) brightness(0.5);
    cursor: not-allowed;
}

/* ===== 背面牌 ===== */
.mahjong-tile.back {
    background: linear-gradient(180deg, #1a5a9a 0%, #154a80 50%, #0f3a68 100%);
    border-color: #2a70b8;
    box-shadow:
        0 4px 12px rgba(0, 0, 0, 0.35),
        inset 0 1px 0 rgba(255,255,255,0.08);
    cursor: default;
    color: transparent;
}

.mahjong-tile.back::after {
    display: none;
}

.mahjong-tile.back .tile-deco,
.mahjong-tile.back .tile-face {
    display: none;
}

/* 背面牌纹理图案 - 增强对比度 */
.mahjong-tile.back::before {
    content: '';
    position: absolute;
    inset: 5px;
    background:
        repeating-linear-gradient(
            45deg,
            transparent,
            transparent 3px,
            rgba(255,255,255,0.1) 3px,
            rgba(255,255,255,0.1) 6px
        );
    border-radius: 5px;
    pointer-events: none;
}

/* 左侧/右侧玩家牌（竖向排列的小牌） */
.player-area.left .mahjong-tile,
.player-area.right .mahjong-tile {
    width: 44px;
    height: 60px;
}

.player-area.left .mahjong-tile .tile-face,
.player-area.right .mahjong-tile .tile-face {
    font-size: 1.7rem;
}

.player-area.left .mahjong-tile.back,
.player-area.right .mahjong-tile.back {
    width: 38px;
    height: 52px;
}

/* 顶部玩家牌 */
.player-area.top .mahjong-tile {
    width: 44px;
    height: 60px;
}

.player-area.top .mahjong-tile .tile-face {
    font-size: 1.7rem;
}

/* ===== 小号牌（副露、弃牌） ===== */
.mahjong-tile.tile-small {
    width: 44px;
    height: 60px;
}

.mahjong-tile.tile-small .tile-face {
    font-size: 1.8rem;
}

/* ===== 摸牌/打牌动画 ===== */
.mahjong-tile.tile-drawn {
    animation: tileDrawn3D calc(0.5s * var(--anim-speed, 1)) cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

@keyframes tileDrawn3D {
    0% {
        transform: rotateY(-180deg) scale(0.3) translateZ(-150px);
        opacity: 0;
    }
    50% {
        transform: rotateY(-20deg) scale(1.15) translateZ(30px);
        opacity: 1;
    }
    75% {
        transform: rotateY(5deg) scale(0.97) translateZ(10px);
    }
    100% {
        transform: rotateY(0deg) scale(1) translateZ(0);
        opacity: 1;
    }
}

.mahjong-tile.tile-discarded {
    animation: tileDiscard3D calc(0.5s * var(--anim-speed, 1)) cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

@keyframes tileDiscard3D {
    0% {
        transform: translateZ(50px) scale(1.3) rotateY(0deg);
        opacity: 0.8;
    }
    50% {
        transform: translateZ(0) scale(1.1) rotateY(180deg);
        opacity: 1;
    }
    100% {
        transform: translateZ(0) scale(1) rotateY(180deg);
        opacity: 1;
    }
}

/* 副露区域 */
.melds-area {
    display: flex;
    gap: 5px;
    padding: 3px;
    min-height: 38px;
    flex-wrap: wrap;
}

.player-area.top .melds-area {
    flex-direction: row;
    justify-content: center;
}

.player-area.left .melds-area {
    flex-direction: column;
    align-items: flex-start;
}

.player-area.right .melds-area {
    flex-direction: column;
    align-items: flex-end;
}

.player-area.bottom .melds-area {
    flex-direction: row;
    justify-content: center;
}

.meld-group {
    display: flex;
    gap: 2px;
    background: rgba(0, 0, 0, 0.25);
    padding: 3px;
    border-radius: 6px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    animation: meldAppear calc(0.3s * var(--anim-speed, 1)) ease;
}

@keyframes meldAppear {
    from { transform: scale(0.8); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

.meld-group .mahjong-tile {
    width: 44px;
    height: 60px;
}

.meld-group .mahjong-tile .tile-face {
    font-size: 1.8rem;
}

/* 牌桌中心 */
.table-center {
    grid-area: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--border-radius);
    padding: 12px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.2);
}

.discard-pile {
    display: flex;
    flex-wrap: wrap;
    contain: layout;
    gap: 4px;
    justify-content: center;
    align-content: flex-start;
    max-width: 100%;
    max-height: 75%;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 4px;
}

.discard-pile::-webkit-scrollbar {
    width: 3px;
}
.discard-pile::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,0.1);
    border-radius: 2px;
}

.discard-pile .mahjong-tile {
    width: 44px;
    height: 60px;
    cursor: default;
    transition: transform 0.2s ease;
}

.discard-pile .mahjong-tile .tile-face {
    font-size: 1.8rem;
}

.discard-pile .mahjong-tile:hover {
    transform: scale(1.12);
    z-index: 5;
}

.discard-pile .mahjong-tile:last-child {
    box-shadow: 0 0 0 2px var(--accent-gold), 0 2px 8px rgba(0, 0, 0, 0.3);
    animation:
        latestDiscardEntry 0.5s cubic-bezier(0.34, 1.56, 0.64, 1) forwards,
        latestDiscardGlow 2s ease-in-out 0.5s infinite;
}

@keyframes latestDiscardEntry {
    0% { transform: scale(1.3); opacity: 0.6; }
    50% { transform: scale(1.08); }
    100% { transform: scale(1); opacity: 1; }
}

.wind-indicator {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--accent-gold), var(--accent-gold-dark));
    color: #2a1a00;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1rem;
    margin: 6px auto;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.round-info {
    font-weight: 500;
}

/* 操作栏 */
.action-bar {
    position: fixed;
    bottom: 70px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    padding: 12px 16px;
    background: var(--bg-panel);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    z-index: 100;
    border: 1px solid rgba(212, 168, 67, 0.15);
    backdrop-filter: blur(10px);
    animation: actionBarIn calc(0.3s * var(--anim-speed, 1)) ease;
}

@keyframes actionBarIn {
    from { opacity: 0; transform: translateX(-50%) translateY(20px); }
    to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

.action-btn {
    padding: 12px 22px;
    border: none;
    border-radius: var(--border-radius-sm);
    font-size: 1.05rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition-fast);
    min-width: 64px;
    position: relative;
    overflow: hidden;
}

.action-btn:not(:disabled) {
    background: linear-gradient(135deg, var(--accent-gold), var(--accent-gold-dark));
    color: #2a1a00;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
}

.action-btn:not(:disabled):hover {
    background: linear-gradient(135deg, var(--accent-gold-light), var(--accent-gold));
    transform: scale(1.08) translateY(-2px);
    box-shadow: 0 4px 16px rgba(212, 168, 67, 0.35);
}

.action-btn:not(:disabled):active {
    transform: scale(1.02) translateY(0);
}

.action-btn:disabled {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-muted);
    cursor: not-allowed;
    opacity: 0.5;
}

.action-btn.secondary {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-secondary);
}

.action-btn.secondary:hover {
    background: rgba(255, 255, 255, 0.15);
    color: var(--text-primary);
}

/* 游戏控制栏 */
.game-controls {
    display: flex;
    justify-content: space-between;
    padding: 10px 20px;
    background: var(--bg-secondary);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    z-index: 50;
}

.control-btn {
    padding: 10px 16px;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition-fast);
    font-size: 0.85rem;
}

.control-btn:hover {
    background: var(--accent-gold);
    color: #2a1a00;
    border-color: var(--accent-gold);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(212, 168, 67, 0.25);
}

/* ===== 子界面通用 ===== */
.lobby-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    padding-bottom: 14px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.lobby-header h2 {
    color: var(--accent-gold);
    font-size: 1.5rem;
    text-shadow: 0 1px 4px rgba(0,0,0,0.3);
}

.lobby-content,
.custom-content {
    max-width: 600px;
    margin: 0 auto;
}

.room-section {
    background: var(--bg-panel);
    border-radius: var(--border-radius);
    padding: 18px;
    margin-bottom: 18px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    transition: var(--transition-fast);
}

.room-section:hover {
    border-color: rgba(212, 168, 67, 0.1);
}

.room-section h3 {
    color: var(--text-secondary);
    font-size: 1.05rem;
    margin-bottom: 14px;
}

.room-config {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.room-config label {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.room-config input,
.room-config select {
    padding: 12px;
    border-radius: var(--border-radius-sm);
    border: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(0, 0, 0, 0.2);
    color: var(--text-primary);
    font-size: 0.9rem;
    outline: none;
    transition: var(--transition-fast);
}

.room-config input:focus,
.room-config select:focus {
    border-color: var(--accent-gold);
    box-shadow: 0 0 0 2px rgba(212, 168, 67, 0.15);
}

.room-list {
    min-height: 120px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--border-radius-sm);
    padding: 10px;
}

.room-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--border-radius-sm);
    margin-bottom: 8px;
    cursor: pointer;
    transition: var(--transition-fast);
    border: 1px solid transparent;
}

.room-item:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(212, 168, 67, 0.15);
    transform: translateX(4px);
}

.room-item-info span {
    display: block;
}

.room-item-name {
    font-weight: 600;
    color: var(--text-primary);
}

.room-item-meta {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.room-item-join {
    padding: 8px 16px;
    background: linear-gradient(135deg, var(--accent-gold), var(--accent-gold-dark));
    border: none;
    border-radius: var(--border-radius-sm);
    color: #2a1a00;
    font-weight: 600;
    cursor: pointer;
    font-size: 0.85rem;
    transition: var(--transition-fast);
}

.room-item-join:hover {
    transform: scale(1.05);
    box-shadow: 0 2px 8px rgba(212, 168, 67, 0.3);
}

/* 自定义模式 */
.rule-section {
    background: var(--bg-panel);
    border-radius: var(--border-radius);
    padding: 18px;
    margin-bottom: 18px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
}

.rule-section h3 {
    color: var(--text-secondary);
    font-size: 1.05rem;
    margin-bottom: 14px;
}

.mahjong-types {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
}

.mahjong-type-card {
    padding: 16px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: var(--transition-fast);
    text-align: center;
    border: 2px solid transparent;
}

.mahjong-type-card:hover {
    background: rgba(255, 255, 255, 0.05);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.mahjong-type-card.selected {
    border-color: var(--accent-gold);
    background: rgba(212, 168, 67, 0.1);
    box-shadow: 0 0 15px rgba(212, 168, 67, 0.15);
}

.mahjong-type-card .type-icon {
    font-size: 2.2rem;
    margin-bottom: 6px;
    filter: drop-shadow(0 1px 2px rgba(0,0,0,0.2));
}

.mahjong-type-card .type-name {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.mahjong-type-card .type-desc {
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-top: 3px;
}

.rule-options {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.rule-option {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px;
    background: rgba(0, 0, 0, 0.15);
    border-radius: var(--border-radius-sm);
    transition: var(--transition-fast);
}

.rule-option:hover {
    background: rgba(0, 0, 0, 0.25);
}

.rule-option label {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* 回放列表 */
.replay-list {
    max-width: 600px;
    margin: 0 auto;
}

.replay-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px;
    background: var(--bg-panel);
    border-radius: var(--border-radius);
    margin-bottom: 12px;
    cursor: pointer;
    transition: var(--transition-fast);
    border: 1px solid rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
}

.replay-item:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(212, 168, 67, 0.15);
    transform: translateX(6px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

.replay-info span {
    display: block;
}

.replay-title {
    font-weight: 600;
    color: var(--text-primary);
}

.replay-meta {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 3px;
}

.replay-actions {
    display: flex;
    gap: 8px;
}

.replay-btn {
    padding: 8px 14px;
    background: linear-gradient(135deg, var(--accent-gold), var(--accent-gold-dark));
    border: none;
    border-radius: var(--border-radius-sm);
    color: #2a1a00;
    font-weight: 600;
    cursor: pointer;
    font-size: 0.82rem;
    transition: var(--transition-fast);
}

.replay-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 2px 8px rgba(212, 168, 67, 0.3);
}

/* 成就 */
.achievements-grid {
    max-width: 600px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.achievement-card {
    padding: 16px;
    background: var(--bg-panel);
    border-radius: var(--border-radius);
    display: flex;
    gap: 12px;
    align-items: center;
    transition: var(--transition-fast);
    border: 1px solid rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
}

.achievement-card.unlocked {
    border-color: rgba(212, 168, 67, 0.3);
    background: rgba(212, 168, 67, 0.05);
}

.achievement-card.locked {
    opacity: 0.5;
}

.achievement-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.achievement-icon {
    font-size: 2.2rem;
    width: 52px;
    text-align: center;
    filter: drop-shadow(0 1px 2px rgba(0,0,0,0.2));
}

.achievement-info {
    flex: 1;
}

.achievement-name {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.92rem;
}

.achievement-desc {
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-top: 3px;
}

.achievement-progress {
    margin-top: 8px;
    height: 5px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 3px;
    overflow: hidden;
}

.achievement-progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-gold-dark), var(--accent-gold));
    border-radius: 3px;
    transition: width 0.5s ease;
    box-shadow: 0 0 8px rgba(212, 168, 67, 0.3);
}

/* 倒计时样式已移至 ui-overhaul.css 中的 .turn-timer-display */
/* 吃碰杠胡弹出文字 */
.action-effect {
    position: fixed;
    top: 45%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--accent-gold);
    text-shadow: 0 0 30px rgba(212, 168, 67, 0.6), 0 4px 8px rgba(0, 0, 0, 0.5);
    animation: actionPop calc(0.9s * var(--anim-speed, 1)) cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
    z-index: 500;
    pointer-events: none;
    white-space: nowrap;
}

@keyframes actionPop {
    0% { transform: translate(-50%, -50%) scale(0.2); opacity: 0; }
    40% { transform: translate(-50%, -50%) scale(1.3); opacity: 1; }
    70% { transform: translate(-50%, -50%) scale(0.95); opacity: 1; }
    100% { transform: translate(-50%, -50%) scale(1.1); opacity: 0; }
}

/* 粒子效果容器 */
#particle-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 400;
    overflow: hidden;
}

.particle {
    position: absolute;
    width: 8px;
    height: 8px;
    background: var(--accent-gold);
    border-radius: 50%;
    pointer-events: none;
    opacity: 0;
}

@keyframes particleBurst {
    0% { transform: translate(0, 0) scale(1); opacity: 1; }
    50% { opacity: 0.8; }
    100% { transform: translate(var(--tx), var(--ty)) scale(0); opacity: 0; }
}

/* 胜利彩带 */
.confetti-piece {
    position: absolute;
    width: 10px;
    height: 10px;
    background: var(--accent-gold);
    animation: confettiFall 3s ease-out forwards;
    pointer-events: none;
}

@keyframes confettiFall {
    0% { transform: translateY(-10vh) rotate(0deg); opacity: 1; }
    100% { transform: translateY(110vh) rotate(720deg); opacity: 0; }
}

/* 响应式游戏界面 */
@media (max-width: 560px) {
    .game-table {
        grid-template-columns: 70px 1fr 70px;
        grid-template-rows: 100px 1fr 170px;
        gap: 3px;
        padding: 6px;
    }
    .mahjong-tile {
        width: 48px;
        height: 66px;
    }
    .mahjong-tile .tile-face {
        font-size: 2rem;
    }
    .player-area.left .mahjong-tile,
    .player-area.right .mahjong-tile,
    .player-area.top .mahjong-tile {
        width: 34px;
        height: 48px;
    }
    .player-area.left .mahjong-tile .tile-face,
    .player-area.right .mahjong-tile .tile-face,
    .player-area.top .mahjong-tile .tile-face {
        font-size: 1.4rem;
    }
    .mahjong-tile.tile-small {
        width: 34px;
        height: 48px;
    }
    .mahjong-tile.tile-small .tile-face {
        font-size: 1.4rem;
    }
    .action-btn {
        padding: 10px 16px;
        font-size: 0.95rem;
        min-width: 54px;
    }
    .action-bar {
        gap: 6px;
        padding: 10px 12px;
    }
    .player-info {
        padding: 4px 6px;
        font-size: 0.7rem;
    }
    .player-name {
        max-width: 45px;
    }
    .achievements-grid {
        grid-template-columns: 1fr;
    }
}

@media (min-width: 768px) {
    .game-table {
        grid-template-columns: 150px 1fr 150px;
        grid-template-rows: 150px 1fr 240px;
    }
    .mahjong-tile {
        width: 72px;
        height: 96px;
    }
    .mahjong-tile .tile-face {
        font-size: 2.8rem;
    }
    .player-area.left .mahjong-tile,
    .player-area.right .mahjong-tile,
    .player-area.top .mahjong-tile {
        width: 50px;
        height: 68px;
    }
    .player-area.left .mahjong-tile .tile-face,
    .player-area.right .mahjong-tile .tile-face,
    .player-area.top .mahjong-tile .tile-face {
        font-size: 1.9rem;
    }
    .mahjong-tile.tile-small {
        width: 50px;
        height: 68px;
    }
    .mahjong-tile.tile-small .tile-face {
        font-size: 1.9rem;
    }
}