/* ========================================
   化学反应连连看 - 黏土风样式文件
   Claymation Style
   ======================================== */

/* ========================================
   全局重置与基础设置
   ======================================== */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    min-height: 100vh;
    background: linear-gradient(145deg, #e8f6f3 0%, #d1ecf1 50%, #c8e6e0 100%);
    font-family: 'Microsoft YaHei', 'PingFang SC', sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: clamp(10px, 3vw, 20px);
    overflow-x: hidden;
}

/* ========================================
   全屏向导式主菜单样式
   ======================================== */

.menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #e0f2f1 0%, #b2dfdb 50%, #80cbc4 100%);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.menu-box {
    background: rgba(255, 255, 255, 0.95);
    padding: 30px;
    border-radius: 20px;
    box-shadow: 
        0 10px 40px rgba(0, 0, 0, 0.15),
        0 0 0 1px rgba(255, 255, 255, 0.5);
    text-align: center;
    width: 90%;
    max-width: 420px;
    animation: menuBoxFadeIn 0.5s ease-out;
}

@keyframes menuBoxFadeIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.menu-title {
    color: #2196F3;
    margin-bottom: 8px;
    font-size: 1.8rem;
    text-shadow: 0 2px 4px rgba(33, 150, 243, 0.2);
}

.menu-subtitle {
    color: #666;
    margin-bottom: 25px;
    font-size: 0.95rem;
}

.menu-step {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.menu-step h3 {
    color: #333;
    margin-bottom: 5px;
    font-size: 1.1rem;
}

.step-btn {
    padding: 15px 20px;
    font-size: 16px;
    font-weight: bold;
    width: 100%;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.15s ease;
    color: white;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.step-btn:hover {
    transform: translateY(-2px);
}

.step-btn:active {
    transform: translateY(2px);
}

.middle-btn {
    background: linear-gradient(180deg, #26A69A 0%, #00897B 100%);
    box-shadow: 
        0 4px 0 #00695C,
        0 6px 12px rgba(0, 105, 92, 0.3);
}

.high-btn {
    background: linear-gradient(180deg, #42A5F5 0%, #1E88E5 100%);
    box-shadow: 
        0 4px 0 #1565C0,
        0 6px 12px rgba(21, 101, 192, 0.3);
}

.easy-btn {
    background: linear-gradient(180deg, #66BB6A 0%, #43A047 100%);
    box-shadow: 
        0 4px 0 #2E7D32,
        0 6px 12px rgba(46, 125, 50, 0.3);
}

.hard-btn {
    background: linear-gradient(180deg, #FFA726 0%, #FB8C00 100%);
    box-shadow: 
        0 4px 0 #E65100,
        0 6px 12px rgba(230, 81, 0, 0.3);
}

.all-btn {
    background: linear-gradient(180deg, #AB47BC 0%, #8E24AA 100%);
    box-shadow: 
        0 4px 0 #6A1B9A,
        0 6px 12px rgba(106, 27, 154, 0.3);
}

.custom-btn {
    background: linear-gradient(180deg, #EC407A 0%, #D81B60 100%);
    box-shadow: 
        0 4px 0 #AD1457,
        0 6px 12px rgba(173, 20, 87, 0.3);
}

.back-btn {
    background: transparent;
    color: #666;
    border: none;
    text-decoration: underline;
    margin-top: 10px;
    padding: 10px;
    font-size: 14px;
    cursor: pointer;
    box-shadow: none;
}

.back-btn:hover {
    color: #333;
    transform: none;
}

.hidden {
    display: none !important;
}

/* ========================================
   游戏主容器 - 黏土质感卡片
   ======================================== */

.game-container {
    background: linear-gradient(180deg, #ffffff 0%, #f5f9fa 100%);
    border-radius: clamp(20px, 5vw, 30px);
    padding: clamp(15px, 4vw, 35px);
    box-shadow: 
        0 8px 0 #c9d6df,
        0 15px 30px rgba(0, 0, 0, 0.15);
    text-align: center;
    width: 100%;
    max-width: 620px;
    box-sizing: border-box;
}

/* ========================================
   游戏标题
   ======================================== */

.game-title {
    color: #4a6fa5;
    font-size: clamp(1.5rem, 5vw, 2.2rem);
    margin-bottom: clamp(15px, 3vw, 25px);
    text-shadow: 
        2px 2px 0 #fff,
        4px 4px 0 rgba(74, 111, 165, 0.2);
}

/* ========================================
   模式控制面板 - 黏土风格
   ======================================== */

.mode-control-panel {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: clamp(10px, 2vw, 25px);
    margin-bottom: clamp(12px, 2vw, 20px);
    padding: clamp(10px, 2vw, 18px) clamp(12px, 2vw, 25px);
    background: linear-gradient(180deg, #f0f5f7 0%, #e4eaed 100%);
    border-radius: clamp(12px, 2vw, 20px);
    box-shadow: 
        inset 0 2px 4px rgba(0, 0, 0, 0.08),
        inset 0 -2px 4px rgba(255, 255, 255, 0.9);
}

.mode-selector {
    display: flex;
    gap: 12px;
}

.mode-btn {
    padding: clamp(10px, 2vw, 14px) clamp(15px, 3vw, 22px);
    font-size: clamp(0.8rem, 2.5vw, 0.95rem);
    font-weight: bold;
    color: #5a6c7d;
    background: linear-gradient(180deg, #ffffff 0%, #f5f7f9 100%);
    border: none;
    border-radius: clamp(10px, 2vw, 15px);
    cursor: pointer;
    transition: all 0.15s ease;
    min-width: clamp(90px, 20vw, 125px);
    box-shadow: 
        0 4px 0 #c5cdd3,
        0 6px 10px rgba(0, 0, 0, 0.1),
        inset 0 2px 0 rgba(255, 255, 255, 0.8),
        inset 0 -2px 4px rgba(0, 0, 0, 0.05);
}

.mode-btn small {
    font-size: 0.72rem;
    color: #8a9bab;
    display: block;
    margin-top: 3px;
}

.mode-btn:hover {
    transform: translateY(-2px);
    box-shadow: 
        0 6px 0 #c5cdd3,
        0 10px 15px rgba(0, 0, 0, 0.12),
        inset 0 2px 0 rgba(255, 255, 255, 0.9),
        inset 0 -2px 4px rgba(0, 0, 0, 0.05);
}

.mode-btn:active {
    transform: translateY(2px);
    box-shadow: 
        0 2px 0 #c5cdd3,
        0 3px 5px rgba(0, 0, 0, 0.1),
        inset 0 2px 4px rgba(0, 0, 0, 0.1);
}

.mode-btn.active[data-mode="easy"] {
    color: #fff;
    background: linear-gradient(180deg, #7ec8a3 0%, #5fb08a 100%);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
    box-shadow: 
        0 4px 0 #3d8a63,
        0 6px 10px rgba(63, 138, 99, 0.3),
        inset 0 2px 0 rgba(255, 255, 255, 0.3),
        inset 0 -2px 4px rgba(0, 0, 0, 0.1);
}

.mode-btn.active[data-mode="easy"] small {
    color: rgba(255, 255, 255, 0.85);
}

.mode-btn.active[data-mode="easy"]:hover {
    box-shadow: 
        0 6px 0 #3d8a63,
        0 10px 15px rgba(63, 138, 99, 0.35),
        inset 0 2px 0 rgba(255, 255, 255, 0.4),
        inset 0 -2px 4px rgba(0, 0, 0, 0.1);
}

.mode-btn.active[data-mode="easy"]:active {
    box-shadow: 
        0 2px 0 #3d8a63,
        0 3px 5px rgba(63, 138, 99, 0.3),
        inset 0 2px 4px rgba(0, 0, 0, 0.15);
}

.mode-btn.active[data-mode="hard"] {
    color: #fff;
    background: linear-gradient(180deg, #f5a5a5 0%, #e88a8a 100%);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
    box-shadow: 
        0 4px 0 #c45a5a,
        0 6px 10px rgba(196, 90, 90, 0.3),
        inset 0 2px 0 rgba(255, 255, 255, 0.3),
        inset 0 -2px 4px rgba(0, 0, 0, 0.1);
}

.mode-btn.active[data-mode="hard"] small {
    color: rgba(255, 255, 255, 0.85);
}

.mode-btn.active[data-mode="hard"]:hover {
    box-shadow: 
        0 6px 0 #c45a5a,
        0 10px 15px rgba(196, 90, 90, 0.35),
        inset 0 2px 0 rgba(255, 255, 255, 0.4),
        inset 0 -2px 4px rgba(0, 0, 0, 0.1);
}

.mode-btn.active[data-mode="hard"]:active {
    box-shadow: 
        0 2px 0 #c45a5a,
        0 3px 5px rgba(196, 90, 90, 0.3),
        inset 0 2px 4px rgba(0, 0, 0, 0.15);
}

.start-btn {
    padding: clamp(10px, 2vw, 14px) clamp(20px, 4vw, 32px);
    font-size: clamp(0.9rem, 2.5vw, 1.05rem);
    font-weight: bold;
    color: #fff;
    background: linear-gradient(180deg, #6ec6e6 0%, #4ab3d6 100%);
    border: none;
    border-radius: clamp(10px, 2vw, 15px);
    cursor: pointer;
    transition: all 0.15s ease;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.15);
    box-shadow: 
        0 4px 0 #2d8fb3,
        0 6px 10px rgba(45, 143, 179, 0.3),
        inset 0 2px 0 rgba(255, 255, 255, 0.3),
        inset 0 -2px 4px rgba(0, 0, 0, 0.08);
}

.start-btn:hover {
    transform: translateY(-2px);
    box-shadow: 
        0 6px 0 #2d8fb3,
        0 10px 15px rgba(45, 143, 179, 0.35),
        inset 0 2px 0 rgba(255, 255, 255, 0.4),
        inset 0 -2px 4px rgba(0, 0, 0, 0.08);
}

.start-btn:active {
    transform: translateY(2px);
    box-shadow: 
        0 2px 0 #2d8fb3,
        0 3px 5px rgba(45, 143, 179, 0.3),
        inset 0 2px 4px rgba(0, 0, 0, 0.12);
}

/* ========================================
   备战大厅面板样式
   ======================================== */

.game-setup-panel {
    background: rgba(255, 255, 255, 0.6);
    border-radius: 12px;
    padding: 15px;
    margin-bottom: 15px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.setup-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-bottom: 10px;
}

.setup-row-three {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 8px;
    margin-bottom: 10px;
}

.setting-select {
    padding: 8px 12px;
    font-size: 14px;
    font-weight: bold;
    color: #333;
    background-color: #fff;
    border: 2px solid #2196F3;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.15s ease;
}

.setting-select:focus {
    border-color: #1976D2;
    box-shadow: 0 0 3px rgba(33, 150, 243, 0.3);
}

.setting-select.eq-type {
    border-color: #00BCD4;
}

.setting-select.mode {
    border-color: #FF9800;
}

/* ========================================
   游戏信息面板
   ======================================== */

.game-info {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: clamp(8px, 2vw, 15px);
    margin-bottom: clamp(12px, 2vw, 22px);
    font-size: clamp(0.85rem, 2.5vw, 1rem);
}

.info-item {
    color: #fff;
    padding: clamp(6px, 1.5vw, 10px) clamp(10px, 2vw, 18px);
    border-radius: clamp(8px, 1.5vw, 12px);
    font-weight: bold;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.15);
    white-space: nowrap;
    box-shadow: 
        0 3px 0 rgba(0, 0, 0, 0.2),
        0 5px 8px rgba(0, 0, 0, 0.15),
        inset 0 2px 0 rgba(255, 255, 255, 0.25);
}

.info-level {
    background: linear-gradient(180deg, #9b8fd6 0%, #7c6fb8 100%);
    box-shadow: 
        0 3px 0 #5a4d8a,
        0 5px 8px rgba(90, 77, 138, 0.25),
        inset 0 2px 0 rgba(255, 255, 255, 0.25);
}

.info-timer {
    position: relative;
    background: linear-gradient(180deg, #f5a5a5 0%, #e88a8a 100%);
    box-shadow: 
        0 3px 0 #c45a5a,
        0 5px 8px rgba(196, 90, 90, 0.25),
        inset 0 2px 0 rgba(255, 255, 255, 0.25);
}

.info-timer.warning {
    background: linear-gradient(180deg, #ff6b6b 0%, #ee5a5a 100%);
    animation: timerPulse 0.5s ease-in-out infinite;
}

@keyframes timerPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

/* 加时视觉反馈 */
.time-flash {
    animation: timeFlash 0.4s ease-out;
    color: #4ade80 !important;
}

@keyframes timeFlash {
    0% { 
        transform: scale(1);
        text-shadow: 0 0 0 transparent;
    }
    50% { 
        transform: scale(1.3);
        text-shadow: 0 0 10px #4ade80, 0 0 20px #4ade80;
    }
    100% { 
        transform: scale(1);
        text-shadow: 0 0 0 transparent;
    }
}

.time-bonus {
    position: absolute;
    right: -30px;
    top: 50%;
    transform: translateY(-50%);
    color: #4ade80;
    font-size: 14px;
    font-weight: bold;
    animation: bonusFloat 0.8s ease-out forwards;
    pointer-events: none;
    text-shadow: 0 0 5px rgba(74, 222, 128, 0.5);
}

@keyframes bonusFloat {
    0% {
        opacity: 1;
        transform: translateY(-50%) translateX(0);
    }
    100% {
        opacity: 0;
        transform: translateY(-50%) translateX(20px);
    }
}

.info-score {
    background: linear-gradient(180deg, #f5c27a 0%, #e8a85a 100%);
    box-shadow: 
        0 3px 0 #c4853a,
        0 5px 8px rgba(196, 133, 58, 0.25),
        inset 0 2px 0 rgba(255, 255, 255, 0.25);
}

.info-remaining {
    background: linear-gradient(180deg, #7ec8a3 0%, #5fb08a 100%);
    box-shadow: 
        0 3px 0 #3d8a63,
        0 5px 8px rgba(63, 138, 99, 0.25),
        inset 0 2px 0 rgba(255, 255, 255, 0.25);
}

/* ========================================
   游戏网格容器 - 黏土托盘
   ======================================== */

.game-board {
    display: grid;
    gap: clamp(3px, 1vw, 8px);
    padding: clamp(10px, 2vw, 18px);
    background: linear-gradient(180deg, #d8ebe5 0%, #c5ddd6 100%);
    border-radius: clamp(12px, 3vw, 20px);
    box-shadow: 
        inset 0 4px 8px rgba(0, 0, 0, 0.1),
        inset 0 -2px 4px rgba(255, 255, 255, 0.6),
        0 4px 0 #a8c5bc,
        0 8px 15px rgba(0, 0, 0, 0.1);
    position: relative;
    margin: 0 auto;
    width: fit-content;
    max-width: 95vw;
    box-sizing: border-box;
    margin-bottom: 20px;
    padding-bottom: 10px;
}

/* ========================================
   方块样式 - 核心黏土质感
   ======================================== */

.tile {
    width: clamp(36px, 10vw, 68px);
    height: clamp(36px, 10vw, 68px);
    border-radius: clamp(8px, 2vw, 15px);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: clamp(0.6rem, 2.5vw, 1.1rem);
    font-weight: bold;
    color: #3d4f5f;
    text-shadow: 
        0 1px 0 rgba(255, 255, 255, 0.5),
        0 -1px 0 rgba(0, 0, 0, 0.1);
    cursor: pointer;
    transition: all 0.15s ease;
    user-select: none;
    background: linear-gradient(180deg, #b8e0ce 0%, #9dd4be 100%);
    box-shadow: 
        0 4px 0 #6ba898,
        0 6px 0 rgba(80, 120, 110, 0.3),
        0 8px 12px rgba(0, 0, 0, 0.12),
        inset 0 2px 0 rgba(255, 255, 255, 0.6),
        inset 0 -3px 6px rgba(0, 0, 0, 0.08);
    /* 允许超长化学式在合适位置自然换行，防止撑爆 */
    white-space: normal !important;
    word-wrap: break-word !important;
    overflow-wrap: break-word !important;
    overflow: hidden !important;
    text-align: center;
    line-height: 1.1;
    padding: 2px;
}

/* 智能字号系统 (配合移动端 clamp 弹性缩放) */
.tile.text-sm {
    font-size: clamp(11px, 2.2vw, 14px) !important;
    letter-spacing: -0.5px;
}

.tile.text-xs {
    font-size: clamp(9px, 1.8vw, 12px) !important;
    letter-spacing: -0.8px;
}

.tile sub {
    font-size: 0.65em;
    vertical-align: sub;
}

/* ========================================
   物质类别颜色样式 - 黏土风配色
   ======================================== */

/* 酸类 - 红色系（温暖的红橙色） */
.tile.block-acid {
    background: linear-gradient(180deg, #ffb3b3 0%, #ff8a8a 100%);
    box-shadow: 
        0 4px 0 #c45a5a,
        0 6px 0 rgba(150, 70, 70, 0.3),
        0 8px 12px rgba(0, 0, 0, 0.12),
        inset 0 2px 0 rgba(255, 255, 255, 0.6),
        inset 0 -3px 6px rgba(0, 0, 0, 0.08);
}

.tile.block-acid:hover {
    background: linear-gradient(180deg, #ffc3c3 0%, #ff9a9a 100%);
    box-shadow: 
        0 7px 0 #c45a5a,
        0 9px 0 rgba(150, 70, 70, 0.3),
        0 12px 18px rgba(0, 0, 0, 0.15),
        inset 0 2px 0 rgba(255, 255, 255, 0.7),
        inset 0 -3px 6px rgba(0, 0, 0, 0.08);
}

.tile.block-acid.selected {
    background: linear-gradient(180deg, #ff9a9a 0%, #ff7a7a 100%);
    box-shadow: 
        0 2px 0 #a04040,
        0 3px 5px rgba(0, 0, 0, 0.1),
        inset 0 3px 6px rgba(0, 0, 0, 0.15),
        inset 0 -2px 0 rgba(255, 255, 255, 0.3);
}

/* 碱类 - 蓝色系（清新的天蓝色） */
.tile.block-base {
    background: linear-gradient(180deg, #a8d8ff 0%, #7cc4f5 100%);
    box-shadow: 
        0 4px 0 #4a9fd4,
        0 6px 0 rgba(60, 120, 160, 0.3),
        0 8px 12px rgba(0, 0, 0, 0.12),
        inset 0 2px 0 rgba(255, 255, 255, 0.6),
        inset 0 -3px 6px rgba(0, 0, 0, 0.08);
}

.tile.block-base:hover {
    background: linear-gradient(180deg, #b8e2ff 0%, #8ccefa 100%);
    box-shadow: 
        0 7px 0 #4a9fd4,
        0 9px 0 rgba(60, 120, 160, 0.3),
        0 12px 18px rgba(0, 0, 0, 0.15),
        inset 0 2px 0 rgba(255, 255, 255, 0.7),
        inset 0 -3px 6px rgba(0, 0, 0, 0.08);
}

.tile.block-base.selected {
    background: linear-gradient(180deg, #8cc4f0 0%, #6ab4e8 100%);
    box-shadow: 
        0 2px 0 #3a80b0,
        0 3px 5px rgba(0, 0, 0, 0.1),
        inset 0 3px 6px rgba(0, 0, 0, 0.15),
        inset 0 -2px 0 rgba(255, 255, 255, 0.3);
}

/* 金属类 - 灰色系（金属质感的银灰色） */
.tile.block-metal {
    background: linear-gradient(180deg, #d4d4d4 0%, #b8b8b8 100%);
    box-shadow: 
        0 4px 0 #888888,
        0 6px 0 rgba(100, 100, 100, 0.3),
        0 8px 12px rgba(0, 0, 0, 0.12),
        inset 0 2px 0 rgba(255, 255, 255, 0.7),
        inset 0 -3px 6px rgba(0, 0, 0, 0.1);
}

.tile.block-metal:hover {
    background: linear-gradient(180deg, #e0e0e0 0%, #c4c4c4 100%);
    box-shadow: 
        0 7px 0 #888888,
        0 9px 0 rgba(100, 100, 100, 0.3),
        0 12px 18px rgba(0, 0, 0, 0.15),
        inset 0 2px 0 rgba(255, 255, 255, 0.8),
        inset 0 -3px 6px rgba(0, 0, 0, 0.1);
}

.tile.block-metal.selected {
    background: linear-gradient(180deg, #c0c0c0 0%, #a8a8a8 100%);
    box-shadow: 
        0 2px 0 #707070,
        0 3px 5px rgba(0, 0, 0, 0.1),
        inset 0 3px 6px rgba(0, 0, 0, 0.15),
        inset 0 -2px 0 rgba(255, 255, 255, 0.3);
}

/* 其他类 - 默认绿色系（保持原有的清新绿） */
.tile.block-other {
    background: linear-gradient(180deg, #b8e0ce 0%, #9dd4be 100%);
    box-shadow: 
        0 4px 0 #6ba898,
        0 6px 0 rgba(80, 120, 110, 0.3),
        0 8px 12px rgba(0, 0, 0, 0.12),
        inset 0 2px 0 rgba(255, 255, 255, 0.6),
        inset 0 -3px 6px rgba(0, 0, 0, 0.08);
}

.tile.block-other:hover {
    background: linear-gradient(180deg, #c5e8d8 0%, #a8dcc6 100%);
    box-shadow: 
        0 7px 0 #6ba898,
        0 9px 0 rgba(80, 120, 110, 0.3),
        0 12px 18px rgba(0, 0, 0, 0.15),
        inset 0 2px 0 rgba(255, 255, 255, 0.7),
        inset 0 -3px 6px rgba(0, 0, 0, 0.08);
}

.tile.block-other.selected {
    background: linear-gradient(180deg, #9dd4be 0%, #8ac8ae 100%);
    box-shadow: 
        0 2px 0 #5a98a0,
        0 3px 5px rgba(0, 0, 0, 0.1),
        inset 0 3px 6px rgba(0, 0, 0, 0.15),
        inset 0 -2px 0 rgba(255, 255, 255, 0.3);
}

/* 默认方块悬停效果（仅保留transform，背景由类别样式控制） */
.tile:hover {
    transform: translateY(-3px);
}

/* 默认方块选中效果（仅保留transform和动画，背景由类别样式控制） */
.tile.selected {
    transform: translateY(2px);
    color: #2d3f4f;
    animation: clayPulse 1s ease-in-out infinite;
}

/* 选中状态的脉冲动画 - 使用通用颜色 */
@keyframes clayPulse {
    0%, 100% {
        filter: brightness(0.95);
    }
    50% {
        filter: brightness(1.05);
        box-shadow: 0 0 0 3px rgba(255, 180, 100, 0.3);
    }
}

.tile.removing {
    animation: clayRemove 0.35s ease-out forwards;
}

@keyframes clayRemove {
    0% {
        transform: scale(1);
        opacity: 1;
    }
    60% {
        transform: scale(1.15);
        opacity: 0.7;
    }
    100% {
        transform: scale(0.3);
        opacity: 0;
    }
}

.tile.empty {
    visibility: hidden;
    pointer-events: none;
}

/* 抖动动画 - 匹配失败时 */
.tile.shake {
    animation: shake 0.4s ease-in-out;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20% { transform: translateX(-6px); }
    40% { transform: translateX(6px); }
    60% { transform: translateX(-4px); }
    80% { transform: translateX(4px); }
}

/* ========================================
   按钮组
   ======================================== */

.button-group {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: clamp(10px, 2vw, 20px);
    margin-top: clamp(15px, 3vw, 25px);
}

.shuffle-btn,
.achievement-btn,
.leaderboard-btn {
    padding: clamp(10px, 2vw, 14px) clamp(20px, 4vw, 38px);
    font-size: clamp(0.85rem, 2.5vw, 1.05rem);
    font-weight: bold;
    color: #fff;
    border: none;
    border-radius: clamp(10px, 2vw, 15px);
    cursor: pointer;
    transition: all 0.15s ease;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.15);
    white-space: nowrap;
}

.shuffle-btn {
    background: linear-gradient(180deg, #f5c27a 0%, #e8a85a 100%);
    box-shadow: 
        0 4px 0 #c4853a,
        0 6px 10px rgba(196, 133, 58, 0.3),
        inset 0 2px 0 rgba(255, 255, 255, 0.35),
        inset 0 -2px 4px rgba(0, 0, 0, 0.08);
}

.shuffle-btn:hover {
    transform: translateY(-2px);
    box-shadow: 
        0 6px 0 #c4853a,
        0 10px 15px rgba(196, 133, 58, 0.35),
        inset 0 2px 0 rgba(255, 255, 255, 0.45),
        inset 0 -2px 4px rgba(0, 0, 0, 0.08);
}

.shuffle-btn:active {
    transform: translateY(2px);
    box-shadow: 
        0 2px 0 #c4853a,
        0 3px 5px rgba(196, 133, 58, 0.3),
        inset 0 2px 4px rgba(0, 0, 0, 0.12);
}

/* ========================================
   连线画布
   ======================================== */

.line-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1000;
}

/* ========================================
   模态框 - 黏土风格
   ======================================== */

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    z-index: 3000;
    display: none;
    backdrop-filter: blur(3px);
}

.modal-box {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.8);
    background: linear-gradient(180deg, #ffffff 0%, #f5f9fa 100%);
    border-radius: clamp(15px, 4vw, 25px);
    padding: clamp(20px, 4vw, 40px) clamp(20px, 5vw, 50px);
    z-index: 3001;
    display: none;
    text-align: center;
    box-shadow: 
        0 10px 0 #c9d6df,
        0 20px 40px rgba(0, 0, 0, 0.3),
        inset 0 2px 0 rgba(255, 255, 255, 0.8);
    animation: modalPop 0.3s ease-out forwards;
    max-width: 90vw;
    max-height: 85vh;
    overflow-y: auto;
    box-sizing: border-box;
}

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

.modal-content {
    font-size: clamp(1.1rem, 4vw, 1.5rem);
    color: #4a6fa5;
    font-weight: bold;
    margin-bottom: clamp(15px, 3vw, 25px);
    line-height: 1.8;
}

.modal-content .big-emoji {
    font-size: clamp(2rem, 8vw, 3rem);
    display: block;
    margin-bottom: clamp(10px, 2vw, 15px);
}

.modal-content .sub-text {
    font-size: clamp(0.9rem, 3vw, 1.1rem);
    color: #6a8caf;
    font-weight: normal;
    margin-top: 8px;
}

.modal-buttons {
    display: flex;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
}

.modal-btn {
    padding: 14px 35px;
    font-size: 1.1rem;
    font-weight: bold;
    border: none;
    border-radius: 15px;
    cursor: pointer;
    transition: all 0.15s ease;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.15);
}

.modal-btn-primary {
    color: #fff;
    background: linear-gradient(180deg, #7ec8a3 0%, #5fb08a 100%);
    box-shadow: 
        0 4px 0 #3d8a63,
        0 6px 10px rgba(63, 138, 99, 0.3),
        inset 0 2px 0 rgba(255, 255, 255, 0.3);
}

.modal-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 
        0 6px 0 #3d8a63,
        0 10px 15px rgba(63, 138, 99, 0.35),
        inset 0 2px 0 rgba(255, 255, 255, 0.4);
}

.modal-btn-primary:active {
    transform: translateY(2px);
    box-shadow: 
        0 2px 0 #3d8a63,
        0 3px 5px rgba(63, 138, 99, 0.3),
        inset 0 2px 4px rgba(0, 0, 0, 0.15);
}

.modal-btn-secondary {
    color: #fff;
    background: linear-gradient(180deg, #6ec6e6 0%, #4ab3d6 100%);
    box-shadow: 
        0 4px 0 #2d8fb3,
        0 6px 10px rgba(45, 143, 179, 0.3),
        inset 0 2px 0 rgba(255, 255, 255, 0.3);
}

.modal-btn-secondary:hover {
    transform: translateY(-2px);
    box-shadow: 
        0 6px 0 #2d8fb3,
        0 10px 15px rgba(45, 143, 179, 0.35),
        inset 0 2px 0 rgba(255, 255, 255, 0.4);
}

.modal-btn-secondary:active {
    transform: translateY(2px);
    box-shadow: 
        0 2px 0 #2d8fb3,
        0 3px 5px rgba(45, 143, 179, 0.3),
        inset 0 2px 4px rgba(0, 0, 0, 0.15);
}

.modal-btn-warning {
    color: #fff;
    background: linear-gradient(180deg, #f5a5a5 0%, #e88a8a 100%);
    box-shadow: 
        0 4px 0 #c45a5a,
        0 6px 10px rgba(196, 90, 90, 0.3),
        inset 0 2px 0 rgba(255, 255, 255, 0.3);
}

.modal-btn-warning:hover {
    transform: translateY(-2px);
    box-shadow: 
        0 6px 0 #c45a5a,
        0 10px 15px rgba(196, 90, 90, 0.35),
        inset 0 2px 0 rgba(255, 255, 255, 0.4);
}

/* ========================================
   救援提示消息 - 黏土风格
   ======================================== */

.rescue-message {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #fff;
    padding: clamp(20px, 4vw, 30px) clamp(25px, 5vw, 50px);
    border-radius: clamp(12px, 3vw, 20px);
    font-size: clamp(1rem, 3.5vw, 1.4rem);
    font-weight: bold;
    text-align: center;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    z-index: 2000;
    display: none;
    background: linear-gradient(180deg, #9b8fd6 0%, #7c6fb8 100%);
    box-shadow: 
        0 6px 0 #5a4d8a,
        0 12px 25px rgba(90, 77, 138, 0.4),
        inset 0 2px 0 rgba(255, 255, 255, 0.3),
        inset 0 -2px 4px rgba(0, 0, 0, 0.1);
    animation: rescuePop 0.4s ease-out;
    max-width: 90vw;
    box-sizing: border-box;
}

.rescue-message small {
    display: block;
    margin-top: clamp(6px, 1.5vw, 10px);
    font-size: clamp(0.7rem, 2.5vw, 0.85rem);
    font-weight: normal;
    color: rgba(255, 255, 255, 0.85);
}

@keyframes rescuePop {
    0% {
        transform: translate(-50%, -50%) scale(0.8);
        opacity: 0;
    }
    50% {
        transform: translate(-50%, -50%) scale(1.05);
    }
    100% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 1;
    }
}

/* ========================================
   反应视觉特效 - 动态特效样式
   ======================================== */

.reaction-effect {
    position: fixed;
    font-size: 30px;
    pointer-events: none;
    z-index: 2500;
    transform: translate(-50%, -50%);
    animation-duration: 0.8s;
    animation-fill-mode: forwards;
}

.effect-gas {
    animation-name: floatUp;
}

@keyframes floatUp {
    0% {
        transform: translate(-50%, -50%) translateY(0);
        opacity: 1;
    }
    100% {
        transform: translate(-50%, -50%) translateY(-50px);
        opacity: 0;
    }
}

.effect-ppt {
    animation-name: sinkDown;
}

@keyframes sinkDown {
    0% {
        transform: translate(-50%, -50%) translateY(0);
        opacity: 1;
    }
    100% {
        transform: translate(-50%, -50%) translateY(50px);
        opacity: 0;
    }
}

.effect-fire {
    animation-name: popShine;
}

@keyframes popShine {
    0% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 1;
    }
    30% {
        transform: translate(-50%, -50%) scale(1.5);
        opacity: 1;
    }
    50% {
        transform: translate(-50%, -50%) scale(1.3);
        opacity: 0.8;
    }
    70% {
        transform: translate(-50%, -50%) scale(1.5);
        opacity: 0.5;
    }
    100% {
        transform: translate(-50%, -50%) scale(1.2);
        opacity: 0;
    }
}

/* ========================================
   成就系统样式
   ======================================== */

.achievement-btn,
.leaderboard-btn {
    padding: 14px 25px;
    font-size: 1rem;
    font-weight: bold;
    color: #fff;
    border: none;
    border-radius: 15px;
    cursor: pointer;
    transition: all 0.15s ease;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.15);
}

.achievement-btn {
    background: linear-gradient(180deg, #f5c27a 0%, #e8a85a 100%);
    box-shadow: 
        0 4px 0 #c4853a,
        0 6px 10px rgba(196, 133, 58, 0.3),
        inset 0 2px 0 rgba(255, 255, 255, 0.35),
        inset 0 -2px 4px rgba(0, 0, 0, 0.08);
}

.achievement-btn:hover {
    transform: translateY(-2px);
    box-shadow: 
        0 6px 0 #c4853a,
        0 10px 15px rgba(196, 133, 58, 0.35),
        inset 0 2px 0 rgba(255, 255, 255, 0.45);
}

.leaderboard-btn {
    background: linear-gradient(180deg, #9b8fd6 0%, #7c6fb8 100%);
    box-shadow: 
        0 4px 0 #5a4d8a,
        0 6px 10px rgba(90, 77, 138, 0.3),
        inset 0 2px 0 rgba(255, 255, 255, 0.35),
        inset 0 -2px 4px rgba(0, 0, 0, 0.08);
}

.leaderboard-btn:hover {
    transform: translateY(-2px);
    box-shadow: 
        0 6px 0 #5a4d8a,
        0 10px 15px rgba(90, 77, 138, 0.35),
        inset 0 2px 0 rgba(255, 255, 255, 0.45);
}

.info-best {
    background: linear-gradient(180deg, #ffd700 0%, #ffb700 100%);
    box-shadow: 
        0 3px 0 #b8860b,
        0 5px 8px rgba(184, 134, 11, 0.25),
        inset 0 2px 0 rgba(255, 255, 255, 0.3);
}

/* 成就弹窗 */
.achievement-modal,
.leaderboard-modal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: linear-gradient(180deg, #ffffff 0%, #f5f9fa 100%);
    border-radius: 25px;
    padding: 30px;
    z-index: 3002;
    display: none;
    flex-direction: column;
    align-items: center;
    max-width: 400px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: 
        0 10px 0 #c9d6df,
        0 20px 40px rgba(0, 0, 0, 0.3),
        inset 0 2px 0 rgba(255, 255, 255, 0.8);
}

.achievement-modal.show,
.leaderboard-modal.show {
    display: flex;
    animation: modalPop 0.3s ease-out forwards;
}

.achievement-header,
.leaderboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid #e0e0e0;
}

.achievement-header h2,
.leaderboard-header h2 {
    color: #4a6fa5;
    font-size: 1.5rem;
    margin: 0;
}

.close-btn {
    background: linear-gradient(180deg, #f5a5a5 0%, #e88a8a 100%);
    border: none;
    border-radius: 50%;
    width: 30px;
    height: 30px;
    font-size: 1.2rem;
    color: #fff;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 3px 0 #c45a5a;
    transition: all 0.15s ease;
}

.close-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 0 #c45a5a;
}

.achievement-list,
.leaderboard-list {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.achievement-item {
    display: flex;
    align-items: center;
    padding: 15px;
    border-radius: 15px;
    background: linear-gradient(180deg, #f0f5f7 0%, #e4eaed 100%);
    box-shadow: 
        inset 0 2px 4px rgba(0, 0, 0, 0.08),
        inset 0 -2px 4px rgba(255, 255, 255, 0.9);
    transition: all 0.3s ease;
}

.achievement-item.unlocked {
    background: linear-gradient(180deg, #d4edda 0%, #c3e6cb 100%);
    box-shadow: 
        inset 0 2px 4px rgba(0, 0, 0, 0.08),
        inset 0 -2px 4px rgba(255, 255, 255, 0.9),
        0 0 10px rgba(74, 222, 128, 0.3);
}

.achievement-item.unlocked .achievement-status {
    color: #4ade80;
}

.achievement-icon {
    font-size: 2rem;
    margin-right: 15px;
}

.achievement-info {
    flex: 1;
}

.achievement-name {
    font-weight: bold;
    color: #3d4f5f;
    font-size: 1rem;
}

.achievement-desc {
    font-size: 0.85rem;
    color: #6a8caf;
    margin-top: 5px;
}

.achievement-status {
    font-size: 1.5rem;
}

.leaderboard-item {
    display: flex;
    align-items: center;
    padding: 12px 15px;
    border-radius: 12px;
    background: linear-gradient(180deg, #f0f5f7 0%, #e4eaed 100%);
    margin-bottom: 8px;
}

.leaderboard-item:nth-child(1) {
    background: linear-gradient(180deg, #ffd700 0%, #ffb700 100%);
    box-shadow: 0 3px 0 #b8860b;
}

.leaderboard-item:nth-child(2) {
    background: linear-gradient(180deg, #c0c0c0 0%, #a8a8a8 100%);
    box-shadow: 0 3px 0 #707070;
}

.leaderboard-item:nth-child(3) {
    background: linear-gradient(180deg, #cd7f32 0%, #b8722e 100%);
    box-shadow: 0 3px 0 #8b4513;
}

.leaderboard-rank {
    font-size: 1.2rem;
    font-weight: bold;
    color: #4a6fa5;
    width: 40px;
    text-align: center;
}

.leaderboard-name {
    flex: 1;
    font-weight: bold;
    color: #3d4f5f;
}

.leaderboard-score {
    font-weight: bold;
    color: #4a6fa5;
}

/* 成就解锁通知 */
.achievement-notification {
    position: fixed;
    top: 20%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: linear-gradient(180deg, #ffd700 0%, #ffb700 100%);
    color: #3d4f5f;
    padding: 20px 40px;
    border-radius: 20px;
    font-size: 1.2rem;
    font-weight: bold;
    z-index: 4000;
    display: none;
    align-items: center;
    gap: 15px;
    box-shadow: 
        0 8px 0 #b8860b,
        0 15px 30px rgba(0, 0, 0, 0.3);
    animation: achievementNotify 0.5s ease-out;
}

.achievement-notification.show {
    display: flex;
}

@keyframes achievementNotify {
    0% {
        transform: translate(-50%, -50%) scale(0.5);
        opacity: 0;
    }
    50% {
        transform: translate(-50%, -50%) scale(1.1);
    }
    100% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 1;
    }
}

/* ========================================
   移动端响应式适配
   ======================================== */

@media screen and (max-width: 600px) {
    body {
        padding: 8px;
        align-items: flex-start;
        padding-top: 15px;
    }
    
    .game-container {
        padding: 12px;
        border-radius: 16px;
    }
    
    .game-title {
        font-size: 1.3rem;
        margin-bottom: 10px;
    }
    
    .mode-control-panel {
        padding: 8px 10px;
        gap: 8px;
        margin-bottom: 10px;
    }
    
    .mode-selector {
        gap: 6px;
    }
    
    .mode-btn {
        padding: 8px 12px;
        font-size: 0.75rem;
        min-width: 75px;
    }
    
    .mode-btn small {
        font-size: 0.6rem;
    }
    
    .start-btn {
        padding: 8px 16px;
        font-size: 0.8rem;
    }
    
    .game-info {
        gap: 6px;
        margin-bottom: 10px;
    }
    
    .info-item {
        padding: 5px 8px;
        font-size: 0.75rem;
        border-radius: 8px;
    }
    
    .game-board {
        gap: 2px;
        padding: 6px;
        border-radius: 12px;
    }
    
    .tile {
        width: clamp(34px, 11.5vw, 44px);
        height: clamp(34px, 11.5vw, 44px);
        border-radius: 8px;
        font-size: clamp(0.5rem, 2.8vw, 0.72rem);
        box-shadow: 
            0 3px 0 rgba(0, 0, 0, 0.2),
            0 4px 0 rgba(0, 0, 0, 0.1),
            0 6px 10px rgba(0, 0, 0, 0.1),
            inset 0 1px 0 rgba(255, 255, 255, 0.5),
            inset 0 -2px 4px rgba(0, 0, 0, 0.06);
    }
    
    .tile sub {
        font-size: 0.55em;
    }
    
    .tile.selected {
        animation: clayPulseMobile 1s ease-in-out infinite;
    }
    
    @keyframes clayPulseMobile {
        0%, 100% {
            filter: brightness(0.95);
        }
        50% {
            filter: brightness(1.05);
            box-shadow: 0 0 0 2px rgba(255, 180, 100, 0.3);
        }
    }
    
    .button-group {
        gap: 8px;
        margin-top: 12px;
    }
    
    .shuffle-btn,
    .achievement-btn,
    .leaderboard-btn {
        padding: 8px 14px;
        font-size: 0.8rem;
        border-radius: 10px;
    }
    
    .modal-box {
        padding: 20px 15px;
        border-radius: 16px;
        max-width: 92vw;
    }
    
    .modal-content {
        font-size: 1rem;
        margin-bottom: 15px;
    }
    
    .modal-content .big-emoji {
        font-size: 2rem;
    }
    
    .modal-content .sub-text {
        font-size: 0.85rem;
    }
    
    .modal-btn {
        padding: 10px 20px;
        font-size: 0.9rem;
    }
    
    .rescue-message {
        padding: 15px 20px;
        font-size: 1rem;
        border-radius: 12px;
        max-width: 92vw;
    }
    
    .rescue-message small {
        font-size: 0.7rem;
    }
    
    .achievement-modal,
    .leaderboard-modal {
        padding: 15px;
        max-width: 95vw;
        max-height: 85vh;
    }
    
    .achievement-header h2,
    .leaderboard-header h2 {
        font-size: 1.2rem;
    }
    
    .achievement-item {
        padding: 10px;
    }
    
    .achievement-icon {
        font-size: 1.5rem;
        margin-right: 10px;
    }
    
    .achievement-name {
        font-size: 0.9rem;
    }
    
    .achievement-desc {
        font-size: 0.75rem;
    }
    
    .achievement-notification {
        padding: 15px 25px;
        font-size: 1rem;
        border-radius: 15px;
    }
    
    .time-bonus {
        font-size: 12px;
        right: -25px;
    }
    
    @keyframes bonusFloat {
        0% {
            opacity: 1;
            transform: translateY(-50%) translateX(0);
        }
        100% {
            opacity: 0;
            transform: translateY(-50%) translateX(15px);
        }
    }
}

/* 超小屏幕（如旧款iPhone SE） */
@media screen and (max-width: 380px) {
    .game-title {
        font-size: 1.1rem;
    }
    
    .mode-btn {
        padding: 6px 10px;
        font-size: 0.7rem;
        min-width: 65px;
    }
    
    .start-btn {
        padding: 6px 12px;
        font-size: 0.75rem;
    }
    
    .info-item {
        padding: 4px 6px;
        font-size: 0.7rem;
    }
    
    .tile {
        width: clamp(30px, 12vw, 38px);
        height: clamp(30px, 12vw, 38px);
        font-size: clamp(0.45rem, 2.8vw, 0.6rem);
        border-radius: 6px;
    }
    
    .game-board {
        gap: 2px;
        padding: 4px;
    }
    
    .shuffle-btn,
    .achievement-btn,
    .leaderboard-btn {
        padding: 6px 10px;
        font-size: 0.7rem;
    }
}

/* 横屏模式优化 */
@media screen and (max-height: 500px) and (orientation: landscape) {
    body {
        padding: 8px;
        align-items: center;
    }
    
    .game-container {
        padding: 10px 15px;
    }
    
    .game-title {
        font-size: 1.2rem;
        margin-bottom: 8px;
    }
    
    .mode-control-panel {
        margin-bottom: 8px;
        padding: 6px 10px;
    }
    
    .game-info {
        margin-bottom: 8px;
    }
    
    .game-board {
        padding: 6px;
        gap: 3px;
    }
    
    .tile {
        width: clamp(30px, 8vh, 45px);
        height: clamp(30px, 8vh, 45px);
    }
    
    .button-group {
        margin-top: 8px;
    }
}

/* 触摸设备优化 */
@media (hover: none) and (pointer: coarse) {
    .tile {
        cursor: default;
    }
    
    .tile:active {
        transform: scale(0.95);
    }
    
    .tile.selected:active {
        transform: translateY(2px) scale(0.95);
    }
    
    .mode-btn:hover,
    .start-btn:hover,
    .shuffle-btn:hover,
    .achievement-btn:hover,
    .leaderboard-btn:hover,
    .modal-btn:hover {
        transform: none;
    }
    
    .mode-btn:active,
    .start-btn:active,
    .shuffle-btn:active,
    .achievement-btn:active,
    .leaderboard-btn:active,
    .modal-btn:active {
        transform: translateY(2px);
    }
}

/* ========================================
   死局自动洗牌提示样式
   ======================================== */

.deadlock-toast {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.8);
    background: linear-gradient(180deg, #ffd700 0%, #ffb700 100%);
    color: #3d4f5f;
    padding: 20px 35px;
    border-radius: 20px;
    font-size: clamp(1rem, 4vw, 1.3rem);
    font-weight: bold;
    text-align: center;
    z-index: 3500;
    opacity: 0;
    pointer-events: none;
    box-shadow: 
        0 8px 0 #b8860b,
        0 15px 30px rgba(0, 0, 0, 0.3),
        inset 0 2px 0 rgba(255, 255, 255, 0.4);
    transition: all 0.3s ease;
}

.deadlock-toast.show {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
    animation: toastBounce 0.5s ease-out;
}

@keyframes toastBounce {
    0% {
        transform: translate(-50%, -50%) scale(0.5);
        opacity: 0;
    }
    60% {
        transform: translate(-50%, -50%) scale(1.1);
    }
    100% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 1;
    }
}

@media screen and (max-width: 600px) {
    .deadlock-toast {
        padding: 15px 25px;
        font-size: 1rem;
        border-radius: 15px;
        max-width: 90vw;
    }
}

/* ========================================
   最高权重移动端适配（终极修复版）
   ======================================== */

@media screen and (max-width: 600px) {
    body {
        padding: 5px !important;
        align-items: flex-start !important;
        padding-top: 8px !important;
    }
    
    .game-container {
        padding: 8px !important;
        border-radius: 12px !important;
    }
    
    .game-title {
        font-size: 1.1rem !important;
        margin-bottom: 8px !important;
    }
    
    .mode-control-panel {
        padding: 6px 8px !important;
        gap: 6px !important;
        margin-bottom: 8px !important;
        flex-wrap: nowrap !important;
    }
    
    .mode-selector {
        display: flex !important;
        gap: 4px !important;
    }
    
    .mode-btn {
        padding: 6px 8px !important;
        font-size: 0.65rem !important;
        min-width: 60px !important;
        border-radius: 8px !important;
    }
    
    .mode-btn small {
        font-size: 0.5rem !important;
    }
    
    .start-btn {
        padding: 6px 12px !important;
        font-size: 0.7rem !important;
        border-radius: 8px !important;
    }
    
    .game-info {
        display: flex !important;
        flex-wrap: nowrap !important;
        gap: 4px !important;
        margin-bottom: 8px !important;
        justify-content: center !important;
    }
    
    .info-item {
        padding: 4px 6px !important;
        font-size: 0.65rem !important;
        border-radius: 6px !important;
        white-space: nowrap !important;
    }
    
    .game-board {
        gap: 2px !important;
        padding: 4px !important;
        border-radius: 10px !important;
        width: fit-content !important;
        max-width: 95vw !important;
        margin: 0 auto !important;
    }
    
    .tile {
        width: clamp(36px, 14vw, 50px) !important;
        height: clamp(36px, 14vw, 50px) !important;
        font-size: clamp(10px, 2.8vw, 13px) !important;
        border-radius: 6px !important;
        line-height: 1.1 !important;
        padding: 2px !important;
        /* 允许超长化学式自然换行 */
        white-space: normal !important;
        word-wrap: break-word !important;
        overflow-wrap: break-word !important;
        overflow: hidden !important;
        text-align: center !important;
    }
    
    .tile sub {
        font-size: 0.6em !important;
    }
    
    /* 移动端智能字号 */
    .tile.text-sm {
        font-size: clamp(9px, 2.4vw, 12px) !important;
    }
    
    .tile.text-xs {
        font-size: clamp(7px, 2vw, 10px) !important;
    }
    
    .button-group {
        display: flex !important;
        flex-wrap: wrap !important;
        gap: 6px !important;
        margin-top: 8px !important;
        justify-content: center !important;
    }
    
    .shuffle-btn,
    .achievement-btn,
    .leaderboard-btn {
        padding: 6px 10px !important;
        font-size: 0.7rem !important;
        border-radius: 8px !important;
    }
}

/* ========================================
   最高权重下标修正（强制将数字拉回底部）
   ======================================== */

.tile sub,
.tile sub,
.tile * sub {
    font-size: 0.65em !important;
    vertical-align: sub !important;
    position: relative !important;
    top: 0.3em !important;
    line-height: 0 !important;
}

/* 确保上标不会出现 */
.tile sup,
.tile * sup {
    font-size: 0.65em !important;
    vertical-align: sub !important;
    position: relative !important;
    top: 0.3em !important;
}

/* ========================================
   专题同步练按钮样式
   ======================================== */

.topic-btn {
    padding: clamp(10px, 2vw, 14px) clamp(15px, 3vw, 22px);
    font-size: clamp(0.8rem, 2.5vw, 0.95rem);
    font-weight: bold;
    color: #fff;
    background: linear-gradient(180deg, #ab47bc 0%, #8e24aa 100%);
    border: none;
    border-radius: clamp(10px, 2vw, 15px);
    cursor: pointer;
    transition: all 0.15s ease;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
    box-shadow: 
        0 4px 0 #6a1b9a,
        0 6px 10px rgba(106, 27, 154, 0.3),
        inset 0 2px 0 rgba(255, 255, 255, 0.2);
}

.topic-btn:hover {
    transform: translateY(-2px);
    box-shadow: 
        0 6px 0 #6a1b9a,
        0 10px 15px rgba(106, 27, 154, 0.4),
        inset 0 2px 0 rgba(255, 255, 255, 0.3);
}

.topic-btn:active {
    transform: translateY(2px);
    box-shadow: 
        0 2px 0 #6a1b9a,
        0 3px 5px rgba(106, 27, 154, 0.3);
}

.topic-btn.active {
    background: linear-gradient(180deg, #e91e63 0%, #c2185b 100%);
    box-shadow: 
        0 4px 0 #880e4f,
        0 6px 10px rgba(136, 14, 79, 0.3),
        inset 0 2px 0 rgba(255, 255, 255, 0.2);
}

/* ========================================
   重新开始按钮样式
   ======================================== */

.restart-btn {
    padding: clamp(10px, 2vw, 14px) clamp(15px, 3vw, 22px);
    font-size: clamp(0.8rem, 2.5vw, 0.95rem);
    font-weight: bold;
    color: #fff;
    background: linear-gradient(180deg, #42a5f5 0%, #1e88e5 100%);
    border: none;
    border-radius: clamp(10px, 2vw, 15px);
    cursor: pointer;
    transition: all 0.15s ease;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
    box-shadow: 
        0 4px 0 #1565c0,
        0 6px 10px rgba(21, 101, 192, 0.3),
        inset 0 2px 0 rgba(255, 255, 255, 0.2);
}

.restart-btn:hover {
    transform: translateY(-2px);
    box-shadow: 
        0 6px 0 #1565c0,
        0 10px 15px rgba(21, 101, 192, 0.4),
        inset 0 2px 0 rgba(255, 255, 255, 0.3);
}

.restart-btn:active {
    transform: translateY(2px);
    box-shadow: 
        0 2px 0 #1565c0,
        0 3px 5px rgba(21, 101, 192, 0.3);
}

/* ========================================
   专题选择弹窗样式
   ======================================== */

.topic-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 4000;
}

.topic-modal.show {
    display: flex;
}

.topic-modal-content {
    background: linear-gradient(180deg, #ffffff 0%, #f5f9fa 100%);
    border-radius: 20px;
    padding: 30px 40px;
    text-align: center;
    box-shadow: 
        0 10px 0 #c9d6df,
        0 20px 40px rgba(0, 0, 0, 0.3);
    max-width: 90vw;
    max-height: 85vh;
    overflow-y: auto;
}

.topic-modal-content h2 {
    color: #4a6fa5;
    margin-bottom: 20px;
    font-size: clamp(1.2rem, 4vw, 1.5rem);
}

.topic-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 20px;
}

.topic-select-btn {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px 20px;
    background: linear-gradient(180deg, #e8f5e9 0%, #c8e6c9 100%);
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.15s ease;
    text-align: left;
    box-shadow: 
        0 3px 0 #81c784,
        0 5px 10px rgba(129, 199, 132, 0.2);
}

.topic-select-btn:hover {
    transform: translateY(-2px);
    box-shadow: 
        0 5px 0 #81c784,
        0 8px 15px rgba(129, 199, 132, 0.3);
}

.topic-select-btn:active {
    transform: translateY(2px);
    box-shadow: 
        0 1px 0 #81c784,
        0 2px 5px rgba(129, 199, 132, 0.2);
}

.topic-icon {
    font-size: 2rem;
}

.topic-name {
    font-size: 1.1rem;
    font-weight: bold;
    color: #2e7d32;
}

.topic-desc {
    font-size: 0.85rem;
    color: #558b2f;
    display: block;
    margin-top: 3px;
}

.topic-cancel-btn {
    padding: 10px 30px;
    font-size: 1rem;
    font-weight: bold;
    color: #666;
    background: linear-gradient(180deg, #f5f5f5 0%, #e0e0e0 100%);
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.15s ease;
    box-shadow: 
        0 3px 0 #bdbdbd,
        0 5px 8px rgba(0, 0, 0, 0.1);
}

.topic-cancel-btn:hover {
    transform: translateY(-2px);
}

.topic-cancel-btn:active {
    transform: translateY(2px);
}

/* 移动端专题按钮适配 */
@media screen and (max-width: 600px) {
    .topic-btn {
        padding: 6px 12px !important;
        font-size: 0.7rem !important;
        border-radius: 8px !important;
    }
    
    .topic-modal-content {
        padding: 20px 15px;
        border-radius: 15px;
    }
    
    .topic-select-btn {
        padding: 12px 15px;
    }
    
    .topic-icon {
        font-size: 1.5rem;
    }
    
    .topic-name {
        font-size: 0.95rem;
    }
    
    .topic-desc {
        font-size: 0.75rem;
    }
}

/* ========================================
   元素级专题选择样式
   ======================================== */

.topic-checkboxes {
    display: flex;
    flex-direction: column;
    gap: 12px;
    font-size: 16px;
    text-align: left;
    margin: 20px 0;
}

.topic-label-all {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 15px;
    background: linear-gradient(180deg, #e3f2fd 0%, #bbdefb 100%);
    border-radius: 10px;
    cursor: pointer;
    font-weight: bold;
    color: #1565c0;
    transition: all 0.15s ease;
}

.topic-label-all:hover {
    background: linear-gradient(180deg, #bbdefb 0%, #90caf9 100%);
}

.topic-label-all input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.topic-divider {
    border: none;
    border-top: 1px solid #e0e0e0;
    margin: 5px 0;
}

.topic-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.topic-label {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 12px;
    background: linear-gradient(180deg, #f5f5f5 0%, #eeeeee 100%);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.15s ease;
    border: 2px solid transparent;
}

.topic-label:hover {
    background: linear-gradient(180deg, #e8f5e9 0%, #c8e6c9 100%);
    border-color: #81c784;
}

.topic-label input[type="checkbox"] {
    width: 16px;
    height: 16px;
    cursor: pointer;
}

.topic-label input[type="checkbox"]:checked + span {
    font-weight: bold;
    color: #2e7d32;
}

.topic-label span {
    font-size: 15px;
    color: #424242;
}

.topic-buttons {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-top: 20px;
}

.topic-confirm-btn {
    padding: 12px 30px;
    font-size: 1rem;
    font-weight: bold;
    color: #fff;
    background: linear-gradient(180deg, #66bb6a 0%, #43a047 100%);
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.15s ease;
    box-shadow: 
        0 3px 0 #2e7d32,
        0 5px 8px rgba(46, 125, 50, 0.2);
}

.topic-confirm-btn:hover {
    transform: translateY(-2px);
    box-shadow: 
        0 5px 0 #2e7d32,
        0 8px 12px rgba(46, 125, 50, 0.3);
}

.topic-confirm-btn:active {
    transform: translateY(2px);
    box-shadow: 
        0 1px 0 #2e7d32,
        0 2px 4px rgba(46, 125, 50, 0.2);
}

/* 移动端元素选择适配 */
@media screen and (max-width: 600px) {
    .topic-grid {
        grid-template-columns: 1fr;
    }
    
    .topic-label {
        padding: 12px 15px;
    }
    
    .topic-buttons {
        flex-direction: column;
    }
    
    .topic-confirm-btn,
    .topic-cancel-btn {
        width: 100%;
    }
}

/* ========================================
   消除方程式漂浮特效
   ======================================== */

.toast-reaction {
    position: fixed;
    color: #E91E63;
    font-size: 20px;
    font-weight: bold;
    text-shadow: 0px 0px 5px white, 0px 0px 10px white;
    pointer-events: none;
    animation: toastFloatUp 2s ease-out forwards;
    z-index: 500;
    white-space: normal;
    text-align: center;
    max-width: 300px;
    background: rgba(255, 255, 255, 0.95);
    padding: 10px 15px;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

@keyframes toastFloatUp {
    0% {
        opacity: 1;
        transform: translate(-50%, 0) scale(0.8);
    }
    30% {
        transform: translate(-50%, -25px) scale(1.05);
    }
    70% {
        opacity: 1;
        transform: translate(-50%, -35px) scale(1);
    }
    100% {
        opacity: 0;
        transform: translate(-50%, -50px) scale(0.95);
    }
}

/* 点错时的摇晃动画 */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    50% { transform: translateX(5px); }
    75% { transform: translateX(-5px); }
}

.shake-error {
    animation: shake 0.4s ease-in-out;
    background-color: #ffebee !important;
}

/* ========================================
   主菜单统一按钮样式
   ======================================== */

.main-mode-btn {
    color: white;
    padding: 15px 20px;
    font-size: 18px;
    font-weight: bold;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: transform 0.1s;
    width: 100%;
}

.main-mode-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 10px rgba(0,0,0,0.15);
}

.main-mode-btn:active {
    transform: translateY(2px);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.sub-btn {
    background-color: #E0F7FA;
    color: #00838F;
    border: 1px solid #4DD0E1;
    padding: 8px 12px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.15s ease;
}

.sub-btn:hover {
    background-color: #B2EBF2;
    transform: translateY(-1px);
}

.sub-btn:active {
    transform: translateY(1px);
}

/* 移动端适配 */
@media screen and (max-width: 600px) {
    .main-mode-btn {
        padding: 12px 15px;
        font-size: 16px;
    }
    
    .sub-btn {
        padding: 6px 10px;
        font-size: 12px;
    }
}