/* 全局样式 - 中国风设计 */
:root {
    /* 中国风色彩 */
    --primary-color: #B22222; /* 朱红色 */
    --secondary-color: #F5DEB3; /* 小麦色 */
    --accent-color: #DAA520; /* 金黄色 */
    --text-color: #333;
    --light-text: #FFF;
    --board-bg: #FFF8DC; /* 象牙白 */
    --board-line: #8B4513; /* 马鞍棕 */
    --red-piece: #DC143C; /* 深红色 */
    --black-piece: #000;
    --highlight-color: #FFD700; /* 金色 */
    --valid-move-color: #90EE90; /* 浅绿色 */
    --last-move-color: #87CEFA; /* 浅蓝色 */
    --check-color: #FF6347; /* 番茄红 */
    --modal-bg: rgba(0, 0, 0, 0.7);
    --card-bg: #FFF;
    --button-bg: #B22222; /* 朱红色 */
    --button-hover: #8B1A1A; /* 深朱红色 */
    --success-color: #4CAF50;
    --error-color: #F44336;
    --warning-color: #FF9800;
    --info-color: #2196F3;
    --border-radius: 8px;
    --box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    --transition: all 0.3s ease;
    
    /* 中国风字体 */
    --chinese-font: 'KaiTi', 'STKaiti', '楷体', serif;
    --heading-font: 'STZhongsong', '华文中宋', '宋体', serif;
}

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

body {
    font-family: var(--chinese-font);
    background-color: #F5F5DC; /* 米色背景 */
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
    background-image: url('chinese-pattern.png');
    background-repeat: repeat;
    background-attachment: fixed;
    /* 移除禁止截屏的样式 */
    -webkit-user-select: text;
    -moz-user-select: text;
    -ms-user-select: text;
    user-select: text;
    -webkit-touch-callout: default;
}

#app {
    width: 100%;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
}

/* 导航栏 - 中国风设计 */
.navbar {
    background-color: var(--primary-color);
    color: var(--light-text);
    padding: 10px 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 2px solid var(--accent-color);
}

.navbar-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-img {
    height: 40px;
    width: auto;
}

.logo-text {
    font-family: var(--heading-font);
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--light-text);
}

.desktop-menu {
    display: flex;
    gap: 15px;
    align-items: center;
}

.menu-btn {
    background: transparent;
    border: none;
    color: var(--light-text);
    padding: 8px 15px;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    border-radius: var(--border-radius);
    font-family: var(--chinese-font);
}

.menu-btn:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.menu-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.lang-selector {
    position: relative;
}

.lang-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: auto;
    padding: 8px 15px;
    background: transparent;
    border: none;
    color: var(--light-text);
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    border-radius: var(--border-radius);
    font-family: var(--chinese-font);
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="12" height="12" viewBox="0 0 12 12"><path fill="white" d="M10.293 3.293L6 7.586 1.707 3.293A1 1 0 00.293 4.707l5 5a1 1 0 001.414 0l5-5a1 1 0 10-1.414-1.414z"/></svg>');
    background-repeat: no-repeat;
    background-position: right 8px center;
    padding-right: 30px;
}

.lang-btn option {
    background-color: var(--primary-color);
    color: var(--light-text);
    padding: 5px;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 21px;
    background: transparent;
    border: none;
    cursor: pointer;
}

.mobile-menu-btn span {
    display: block;
    height: 3px;
    width: 100%;
    background-color: var(--light-text);
    border-radius: 3px;
}

/* 侧边菜单 - 中国风设计 */
.side-menu {
    position: fixed;
    top: 0;
    right: -300px;
    width: 300px;
    height: 100%;
    background-color: var(--card-bg);
    box-shadow: -5px 0 15px rgba(0, 0, 0, 0.2);
    transition: right 0.3s ease;
    z-index: 999;
    overflow-y: auto;
    border-left: 3px solid var(--primary-color);
}

.side-menu.active {
    right: 0;
}

.close-menu-btn {
    position: absolute;
    top: 15px;
    right: 15px;
    background: transparent;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--text-color);
}

.menu-list {
    list-style: none;
    padding: 60px 0 20px;
}

.menu-list li {
    margin-bottom: 10px;
}

.menu-list .menu-btn {
    display: block;
    width: 100%;
    padding: 12px 20px;
    background: transparent;
    border: none;
    text-align: left;
    font-size: 16px;
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-color);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.menu-list .menu-btn:hover {
    background-color: var(--secondary-color);
    color: var(--primary-color);
}

.menu-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 20px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

/* 模式选择界面 - 中国风设计 */
.mode-selection {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
    flex-grow: 1;
    text-align: center;
    background-image: url('chinese-bg.jpg');
    background-size: cover;
    background-position: center;
    position: relative;
}

.mode-selection::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(245, 222, 179, 0.85); /* 半透明小麦色 */
    z-index: 1;
}

.mode-selection-container {
    position: relative;
    z-index: 2;
    max-width: 1200px;
    width: 100%;
}

.mode-selection h1 {
    font-family: var(--heading-font);
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.mode-selection p {
    font-size: 1.5rem;
    margin-bottom: 40px;
    color: var(--primary-color);
}

.mode-cards {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 30px;
    max-width: 1200px;
    width: 100%;
}

.mode-card {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 30px;
    width: 350px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    border: 2px solid var(--accent-color);
}

.mode-card-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('chinese-pattern.png');
    opacity: 0.1;
    z-index: 1;
}

.mode-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.3);
}

.mode-card.disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.mode-card h3 {
    font-family: var(--heading-font);
    font-size: 1.8rem;
    margin-bottom: 15px;
    color: var(--primary-color);
    position: relative;
    z-index: 2;
}

.mode-card p {
    margin-bottom: 20px;
    font-size: 1.1rem;
    color: var(--text-color);
    position: relative;
    z-index: 2;
}

.play-btn {
    background-color: var(--primary-color);
    color: var(--light-text);
    border: none;
    border-radius: var(--border-radius);
    padding: 12px 25px;
    font-size: 1.1rem;
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--chinese-font);
    position: relative;
    z-index: 2;
    border: 1px solid var(--accent-color);
}

.play-btn:hover:not(:disabled) {
    background-color: var(--button-hover);
}

.play-btn:disabled {
    background-color: #cccccc;
    cursor: not-allowed;
}

/* 游戏界面 - 中国风设计 */
.game-screen {
    display: flex;
    flex-direction: column;
    min-height: 88vh;
    padding: 0;
    background-color: var(--board-bg);
    background-image: url('chinese-pattern.png');
    background-repeat: repeat;
}

/* 玩家信息行 - 中国风设计 */
.player-info-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    background-color: rgba(245, 222, 179, 0.9); /* 半透明小麦色 */
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    border-bottom: 2px solid var(--accent-color);
    flex-wrap: nowrap;
    width: 100%;
    overflow: hidden;
}

.player-info {
    display: flex;
    align-items: center;
    gap: 15px;
    min-width: 0;
    flex: 1;
}

/* 修复黑方玩家信息靠右对齐 */
.player-info.black-player {
    /*justify-content: flex-end;*/
    text-align: right;
    flex-direction: row-reverse;
    justify-content: right;    
}

.player-avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background-color: var(--secondary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 3px solid var(--accent-color);
    position: relative;
    flex-shrink: 0;
}

.avatar-placeholder {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--light-text);
}

/* 红方头像背景色 */
.avatar-placeholder.red-avatar {
    background-color: var(--red-piece);
    border: 2px solid var(--red-piece);
}

/* 黑方头像背景色 */
.avatar-placeholder.black-avatar {
    background-color: var(--black-piece);
    border: 2px solid var(--black-piece);
}

/* 呼吸动画 */
@keyframes breathing {
    0% { opacity: 0.7; }
    50% { opacity: 1; }
    100% { opacity: 0.7; }
}

.breathing {
    animation: breathing 2s infinite ease-in-out;
}

/* 黑方走棋后的红色呼吸灯效果 */
@keyframes redBreathing {
    0% { background-color: rgba(220, 20, 60, 0.3); }
    50% { background-color: rgba(220, 20, 60, 0.7); }
    100% { background-color: rgba(220, 20, 60, 0.3); }
}

.black-move-highlight {
    animation: redBreathing 2s infinite ease-in-out;
}

.player-details h3 {
    font-family: var(--heading-font);
    font-size: 1.2rem;
    margin-bottom: 5px;
    color: var(--primary-color);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.player-timer {
    font-size: 1.1rem;
    font-weight: bold;
    color: var(--primary-color);
}

.game-info {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
    flex: 0 0 auto;
}

.start-game-btn {
    background-color: var(--primary-color);
    color: var(--light-text);
    border: none;
    border-radius: var(--border-radius);
    padding: 8px 15px;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--chinese-font);
    border: 1px solid var(--accent-color);
    min-width: 120px;
}

.start-game-btn:hover {
    background-color: var(--button-hover);
}

/* AI状态显示 */
.ai-status {
    font-size: 0.9rem;
    color: var(--primary-color);
    background-color: rgba(245, 222, 179, 0.8);
    padding: 4px 8px;
    border-radius: 4px;
    border: 1px solid var(--accent-color);
}

/* 已吃棋子行 - 中国风设计 */
.captured-pieces-row {
    padding: 10px 20px;
    background-color: #C0C0C0; /* 银灰色 */
    min-height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.captured-pieces-container {
    max-width: 1200px;
    width: 100%;
    display: flex;
    align-items: center;
    gap: 20px;
}

.captured-pieces-container h4 {
    font-family: var(--heading-font);
    font-size: 1.1rem;
    color: var(--primary-color);
    white-space: nowrap;
}

.captured-pieces {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
}

.captured-piece {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    font-family: var(--chinese-font);
}

.captured-piece.red {
    background-color: #FFF;
    color: var(--red-piece);
    border: 1px solid var(--red-piece);
}

.captured-piece.black {
    background-color: #FFF;
    color: var(--black-piece);
    border: 1px solid var(--black-piece);
}

/* 棋盘行 - 中国风设计 */
.board-row {
    display: flex;
    justify-content: center;
    align-items: center;
    /*padding: 20px;*/
    flex-grow: 1;
    min-height: 0;
    max-height: 64vh;
}

.board-container {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    max-width: 600px;
    height: 100%;
}

#chessboard {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    border-radius: var(--border-radius);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    border: 5px solid var(--primary-color);
    object-fit: contain;
}

/* 游戏控制 - 中国风设计 */
.game-controls {
    display: flex;
    justify-content: center;
    gap: 15px;
    padding: 15px;
    background-color: rgba(245, 222, 179, 0.9); /* 半透明小麦色 */
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
    border-top: 2px solid var(--accent-color);
    flex-wrap: nowrap;
    width: 100%;
    overflow: hidden;
}

.control-btn {
    background-color: var(--primary-color);
    color: var(--light-text);
    border: none;
    border-radius: var(--border-radius);
    padding: 10px 15px;
    font-size: 1.2rem;
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--chinese-font);
    border: 1px solid var(--accent-color);
    min-width: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.control-btn:hover {
    background-color: var(--button-hover);
}

.control-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* 模态框 - 中国风设计 */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--modal-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 20px;
}

.modal.hidden {
    display: none;
}

.modal-content {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    max-width: 90%;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    border: 2px solid var(--primary-color);
    background-image: url('chinese-pattern.png');
    background-repeat: repeat;
    position: relative;
}

.modal-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.9);
    z-index: 1;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    border-bottom: 1px solid var(--primary-color);
    position: relative;
    z-index: 2;
}

.modal-header h2 {
    font-family: var(--heading-font);
    font-size: 1.5rem;
    color: var(--primary-color);
}

.close-btn {
    background: transparent;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--text-color);
}

.modal-body {
    padding: 20px;
    flex-grow: 1;
    position: relative;
    z-index: 2;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    padding: 15px 20px;
    border-top: 1px solid var(--primary-color);
    position: relative;
    z-index: 2;
}

.btn-primary, .btn-secondary {
    border: none;
    border-radius: var(--border-radius);
    padding: 10px 20px;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--chinese-font);
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--light-text);
    border: 1px solid var(--accent-color);
}

.btn-primary:hover {
    background-color: var(--button-hover);
}

.btn-secondary {
    background-color: #f0f0f0;
    color: var(--text-color);
    border: 1px solid var(--primary-color);
}

.btn-secondary:hover {
    background-color: #e0e0e0;
}

/* 设置页面 - 中国风设计 */
.setting-group {
    margin-bottom: 25px;
}

.setting-group h3 {
    font-family: var(--heading-font);
    margin-bottom: 15px;
    color: var(--primary-color);
    font-size: 1.2rem;
}

.setting-item {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 15px;
}

.time-setting {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-top: 10px;
}

/* 开关按钮样式 - 中国风设计 */
.switch {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 30px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    transition: var(--transition);
    border-radius: 30px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 22px;
    width: 22px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: var(--transition);
    border-radius: 50%;
}

input:checked + .slider {
    background-color: var(--primary-color);
}

input:checked + .slider:before {
    transform: translateX(30px);
}

/* 难度选择器 - 中国风设计 */
.difficulty-selector {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.difficulty-levels {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.level-group {
    background-color: rgba(245, 222, 179, 0.5);
    padding: 15px;
    border-radius: var(--border-radius);
    border: 1px solid var(--primary-color);
}

.level-group h4 {
    font-family: var(--heading-font);
    margin-bottom: 10px;
    color: var(--primary-color);
}

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

/* 单选按钮样式 - 中国风设计 */
.radio-label {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    font-family: var(--chinese-font);
    padding: 5px 0;
}

.radio-label input[type="radio"] {
    width: 18px;
    height: 18px;
    accent-color: var(--primary-color);
}

.radio-label span {
    font-size: 1rem;
    color: var(--text-color);
}

/* 帮助页面 - 中国风设计 */
.help-section {
    margin-bottom: 25px;
}

.help-section h3 {
    font-family: var(--heading-font);
    margin-bottom: 10px;
    color: var(--primary-color);
    font-size: 1.2rem;
}

.help-section ul {
    padding-left: 20px;
}

.help-section li {
    margin-bottom: 8px;
}

.mode-description {
    margin-bottom: 15px;
    padding-left: 15px;
    border-left: 3px solid var(--primary-color);
}

/* 关于我们页面 - 中国风设计 */
.about-logo {
    text-align: center;
    margin-bottom: 25px;
}

.about-logo h1 {
    font-family: var(--heading-font);
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.about-features,
.about-contact {
    margin-bottom: 25px;
}

.about-features h3,
.about-contact h3 {
    font-family: var(--heading-font);
    margin-bottom: 10px;
    color: var(--primary-color);
    font-size: 1.2rem;
}

/* 游戏结束页面 - 中国风设计 */
.game-result {
    text-align: center;
    margin-bottom: 20px;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

.game-stats {
    display: flex;
    justify-content: space-around;
    margin-bottom: 20px;
}

.stat-item {
    text-align: center;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

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

/* 提示页面 - 中国风设计 */
.hint-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
}

.hint-move {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 15px;
    background-color: rgba(245, 222, 179, 0.5);
    border-radius: var(--border-radius);
    width: 100%;
    border: 1px solid var(--primary-color);
}

.hint-piece {
    font-size: 1.5rem;
}

.hint-description {
    flex-grow: 1;
}

/* 升变模态框 - 中国风设计 */
.promotion-options {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-top: 20px;
}

.promotion-option {
    background-color: #f0f0f0;
    border: 1px solid var(--primary-color);
    border-radius: var(--border-radius);
    padding: 15px;
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--transition);
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.promotion-option:hover {
    background-color: var(--secondary-color);
}

/* 底部版权信息 - 中国风设计 */
.footer {
    background-color: var(--primary-color);
    color: var(--light-text);
    text-align: center;
    padding: 15px 0;
    margin-top: auto;
    border-top: 2px solid var(--accent-color);
}

.footer p {
    margin: 0;
    font-family: var(--chinese-font);
}

/* API设置样式 */
.ai-provider-select, .api-key-input, .api-url-input {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--primary-color);
    border-radius: var(--border-radius);
    font-family: var(--chinese-font);
    font-size: 1rem;
    background-color: #fff;
}

.api-key-input {
    font-family: monospace;
}

/* API密钥显示/隐藏按钮 */
.api-key-container {
    display: flex;
    width: 100%;
}

.api-key-input {
    flex-grow: 1;
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
}

.api-key-toggle {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 0 10px;
    cursor: pointer;
    border-top-right-radius: var(--border-radius);
    border-bottom-right-radius: var(--border-radius);
    font-size: 16px;
}

.api-key-toggle:hover {
    background-color: var(--button-hover);
}

/* AI级别设置样式 */
.level-config-container {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.level-selector {
    display: flex;
    align-items: center;
    gap: 10px;
}

.level-selector select {
    padding: 8px 12px;
    border: 1px solid var(--primary-color);
    border-radius: var(--border-radius);
    font-family: var(--chinese-font);
    font-size: 1rem;
    background-color: #fff;
    min-width: 200px;
}

.level-config {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.config-item {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.config-item label {
    font-weight: bold;
    color: var(--primary-color);
}

.config-item textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--primary-color);
    border-radius: var(--border-radius);
    font-family: monospace;
    font-size: 0.9rem;
    resize: vertical;
    min-height: 120px;
    background-color: #fff;
}

.config-item input[type="range"] {
    width: 100%;
    margin: 5px 0;
}

.config-actions {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
}

/* 响应式设计 - 中国风设计 */
@media (max-width: 768px) {
    .desktop-menu {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .player-info-row {
        padding: 10px 15px;
        gap: 10px;
    }
    
    .player-info {
        gap: 10px;
    }
    
    .player-avatar {
        width: 50px;
        height: 50px;
    }
    
    .avatar-placeholder {
        width: 40px;
        height: 40px;
        font-size: 20px;
    }
    
    .player-details h3 {
        font-size: 1rem;
    }
    
    .player-timer {
        font-size: 0.9rem;
    }
    
    .game-controls {
        padding: 10px;
        gap: 10px;
    }
    
    .control-btn {
        font-size: 1rem;
        padding: 8px 12px;
        min-width: 45px;
    }
    
    .modal-content {
        max-width: 95%;
    }
    
    .mode-cards {
        flex-direction: column;
        align-items: center;
    }
    
    .mode-card {
        width: 100%;
        max-width: 400px;
    }
    
    .captured-pieces-container {
        align-items: center;
        text-align: center;
    }
    
    .difficulty-selector {
        justify-content: center;
    }
    
    .board-row {
        /*padding: 10px;*/
        max-height: 72vh; /*50vh; 减小棋盘在移动端的高度 */
    }
    
    .captured-pieces-row {
        padding: 5px 10px;
        min-height: 50px;
    }
    
    .game-screen {
        min-height: 100vh; /* 确保游戏界面占满整个视口高度 */
    }
    
    .board-container {
        max-width: 95%; /* 确保棋盘容器在移动端有足够的空间 */
    }
    
    /* AI级别设置响应式 */
    .level-config-container {
        gap: 15px;
    }
    
    .level-selector {
        flex-direction: column;
        align-items: flex-start;
        gap: 5px;
    }
    
    .level-selector select {
        width: 100%;
        min-width: auto;
    }
    
    .config-actions {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .logo-text {
        font-size: 1.2rem;
    }
    
    .mode-selection h1 {
        font-size: 2rem;
    }
    
    .mode-selection p {
        font-size: 1.2rem;
    }
    
    .player-info-row {
        padding: 8px 10px;
        gap: 5px;
    }
    
    .player-info {
        gap: 5px;
    }
    
    .player-avatar {
        width: 40px;
        height: 40px;
    }
    
    .avatar-placeholder {
        width: 30px;
        height: 30px;
        font-size: 16px;
    }
    
    .player-details h3 {
        font-size: 0.9rem;
    }
    
    .player-timer {
        font-size: 0.8rem;
    }
    
    .game-controls {
        padding: 8px;
        gap: 5px;
    }
    
    .control-btn {
        font-size: 0.9rem;
        padding: 6px 10px;
        min-width: 40px;
    }
    
    .game-stats {
        flex-direction: column;
        gap: 15px;
    }
    
    .board-row {
        /*padding: 5px;*/
        max-height: 53vh; /* 进一步减小棋盘在小屏幕上的高度 */
    }
    
    .captured-pieces-row {
        padding: 3px 5px;
        min-height: 40px;
    }
    
    .captured-piece {
        width: 25px;
        height: 25px;
        font-size: 14px;
    }
    
    .start-game-btn {
        min-width: 100px;
        font-size: 0.9rem;
        padding: 6px 12px;
    }
}

@media (max-width: 360px) {
    .logo-text {
        font-size: 1.2rem;
    }
    
    .mode-selection h1 {
        font-size: 2rem;
    }
    
    .mode-selection p {
        font-size: 1.2rem;
    }
    
    .player-info-row {
        padding: 8px 10px;
        gap: 5px;
    }
    
    .player-info {
        gap: 5px;
    }
    
    .player-avatar {
        width: 40px;
        height: 40px;
    }
    
    .avatar-placeholder {
        width: 30px;
        height: 30px;
        font-size: 16px;
    }
    
    .player-details h3 {
        font-size: 0.9rem;
    }
    
    .player-timer {
        font-size: 0.8rem;
    }
    
    .game-controls {
        padding: 8px;
        gap: 5px;
    }
    
    .control-btn {
        font-size: 0.9rem;
        padding: 6px 10px;
        min-width: 40px;
    }
    
    .game-stats {
        flex-direction: column;
        gap: 15px;
    }
    
    .board-row {
        /*padding: 5px;*/
        max-height: 37vh; /* 进一步减小棋盘在小屏幕上的高度 */
    }
    
    .captured-pieces-row {
        padding: 3px 5px;
        min-height: 40px;
    }
    
    .captured-piece {
        width: 25px;
        height: 25px;
        font-size: 14px;
    }
    
    .start-game-btn {
        min-width: 100px;
        font-size: 0.9rem;
        padding: 6px 12px;
    }
}