/* ===== v8.0 精美UI设计 - 童话探险风格 ===== */
@import url('https://fonts.googleapis.com/css2?family=Nunito:wght@400;600;700;800&display=swap');

:root {
    --sky-start: #667eea;
    --sky-end: #764ba2;
    --sun: #FFD93D;
    --cloud: rgba(255,255,255,0.9);
    --grass: #6BCB77;
    --card-bg: rgba(255,255,255,0.95);
    --shadow: rgba(0,0,0,0.1);
    --text-primary: #2D3436;
    --text-secondary: #636E72;
}

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

body { 
    font-family: 'Nunito', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: linear-gradient(180deg, #a8edea 0%, #fed6e3 50%, #d299c2 100%);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* 背景装饰 - 云朵 */
body::before {
    content: '☁️';
    position: fixed;
    top: 5%;
    left: 10%;
    font-size: 60px;
    opacity: 0.6;
    animation: float 6s ease-in-out infinite;
}

body::after {
    content: '☁️';
    position: fixed;
    top: 15%;
    right: 15%;
    font-size: 40px;
    opacity: 0.4;
    animation: float 8s ease-in-out infinite reverse;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

.game-container { 
    max-width: 900px; 
    margin: 0 auto; 
    padding: 15px;
    position: relative;
    z-index: 1;
}

/* ===== 顶部状态栏 - 玻璃态效果 ===== */
.header { 
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.9) 0%, rgba(118, 75, 162, 0.9) 100%);
    border-radius: 24px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 10px 40px rgba(102, 126, 234, 0.3);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.2);
    position: relative;
    overflow: hidden;
}

.header::before {
    content: '✨';
    position: absolute;
    top: 10px;
    right: 20px;
    font-size: 30px;
    animation: sparkle 2s ease-in-out infinite;
}

@keyframes sparkle {
    0%, 100% { opacity: 0.5; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.2); }
}

.player-info { 
    display: flex; 
    align-items: center; 
    gap: 20px;
}

.avatar { 
    width: 70px; 
    height: 70px; 
    border-radius: 50%; 
    background: linear-gradient(135deg, #FFD93D 0%, #F6AD55 100%);
    display: flex; 
    align-items: center; 
    justify-content: center; 
    font-size: 36px; 
    cursor: pointer;
    box-shadow: 0 6px 20px rgba(255, 217, 61, 0.4);
    border: 4px solid white;
    transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    position: relative;
}

.avatar:hover {
    transform: scale(1.15) rotate(10deg);
    box-shadow: 0 8px 30px rgba(255, 217, 61, 0.6);
}

.avatar::after {
    content: '👑';
    position: absolute;
    top: -10px;
    right: -10px;
    font-size: 20px;
}

.header .player-info > div:nth-child(2) > div:first-child {
    color: white;
    font-size: 20px;
    font-weight: 800;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
    letter-spacing: 0.5px;
}

.stats { 
    display: flex; 
    gap: 10px; 
    flex-wrap: wrap;
    margin-top: 10px;
}

.stat-item { 
    background: rgba(255,255,255,0.95); 
    padding: 8px 16px; 
    border-radius: 25px; 
    font-size: 14px; 
    font-weight: 700;
    box-shadow: 0 3px 10px rgba(0,0,0,0.1);
    transition: all 0.2s;
    border: 2px solid transparent;
}

.stat-item:hover {
    transform: translateY(-3px);
    border-color: #FFD93D;
}

/* ===== 中央角色展示区 ===== */
.hero-section {
    text-align: center;
    padding: 30px 20px;
    margin-bottom: 20px;
    background: linear-gradient(135deg, rgba(255,255,255,0.9) 0%, rgba(255,255,255,0.7) 100%);
    border-radius: 30px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.1);
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255,255,255,0.5);
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '🌟';
    position: absolute;
    top: 15px;
    left: 20px;
    font-size: 25px;
    animation: bounce 2s infinite;
}

.hero-section::after {
    content: '🌟';
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: 25px;
    animation: bounce 2s infinite 0.5s;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.hero-avatar {
    font-size: 100px;
    margin: 10px 0;
    display: inline-block;
    animation: heroFloat 3s ease-in-out infinite;
    filter: drop-shadow(0 10px 20px rgba(0,0,0,0.2));
}

@keyframes heroFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

.hero-title {
    font-size: 28px;
    font-weight: 800;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 10px 0;
}

.hero-subtitle {
    color: var(--text-secondary);
    font-size: 16px;
    font-weight: 600;
}

/* ===== 功能菜单 - 圆形图标设计 ===== */
.main-menu { 
    display: grid; 
    grid-template-columns: repeat(5, 1fr); 
    gap: 15px;
    padding: 10px;
}

@media (max-width: 768px) {
    .main-menu {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 480px) {
    .main-menu {
        grid-template-columns: repeat(2, 1fr);
    }
}

.menu-card { 
    background: linear-gradient(135deg, rgba(255,255,255,0.95) 0%, rgba(255,255,255,0.85) 100%);
    border-radius: 24px; 
    padding: 25px 15px; 
    text-align: center; 
    cursor: pointer;
    box-shadow: 0 8px 25px rgba(0,0,0,0.08);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    border: 3px solid transparent;
    position: relative;
    overflow: hidden;
}

.menu-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: linear-gradient(90deg, var(--color-1), var(--color-2));
    opacity: 0;
    transition: opacity 0.3s;
}

.menu-card:hover::before {
    opacity: 1;
}

.menu-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 20px 40px rgba(0,0,0,0.15);
    border-color: rgba(255,255,255,0.8);
}

.menu-card:active {
    transform: translateY(-4px) scale(0.98);
}

/* 每个卡片的独特渐变色 */
.menu-card:nth-child(1) { --color-1: #667eea; --color-2: #764ba2; }
.menu-card:nth-child(2) { --color-1: #11998e; --color-2: #38ef7d; }
.menu-card:nth-child(3) { --color-1: #fc4a1a; --color-2: #f7b733; }
.menu-card:nth-child(4) { --color-1: #ee0979; --color-2: #ff6a00; }
.menu-card:nth-child(5) { --color-1: #4facfe; --color-2: #00f2fe; }
.menu-card:nth-child(6) { --color-1: #43e97b; --color-2: #38f9d7; }
.menu-card:nth-child(7) { --color-1: #fa709a; --color-2: #fee140; }
.menu-card:nth-child(8) { --color-1: #30cfd0; --color-2: #330867; }
.menu-card:nth-child(9) { --color-1: #a8edea; --color-2: #fed6e3; }
.menu-card:nth-child(10) { --color-1: #ff9a9e; --color-2: #fecfef; }

.menu-card .icon { 
    font-size: 42px; 
    margin-bottom: 12px;
    display: block;
    transition: transform 0.3s;
}

.menu-card:hover .icon {
    transform: scale(1.2) rotate(-5deg);
}

.menu-card h2 {
    font-size: 15px;
    color: var(--text-primary);
    font-weight: 700;
    margin: 0;
    letter-spacing: 0.5px;
}

.menu-card .badge {
    position: absolute;
    top: 8px;
    right: 8px;
    background: linear-gradient(135deg, #ff6b6b, #ee5a24);
    color: white;
    font-size: 10px;
    padding: 3px 8px;
    border-radius: 10px;
    font-weight: 700;
}

/* ===== 页面容器 ===== */
.page { 
    background: linear-gradient(135deg, rgba(255,255,255,0.95) 0%, rgba(255,255,255,0.9) 100%);
    border-radius: 30px; 
    padding: 30px; 
    min-height: 500px;
    box-shadow: 0 15px 50px rgba(0,0,0,0.1);
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255,255,255,0.5);
}

.hidden { display: none !important; }

/* ===== 按钮样式 ===== */
.btn { 
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); 
    color: white; 
    border: none; 
    padding: 18px 30px; 
    border-radius: 20px; 
    font-size: 17px; 
    font-weight: 700; 
    cursor: pointer; 
    width: 100%; 
    margin: 12px 0;
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
    transition: all 0.3s;
    letter-spacing: 0.5px;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.5s;
}

.btn:hover::before {
    left: 100%;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.5);
}

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

.btn-secondary { 
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    color: var(--text-primary);
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.btn-secondary:hover {
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

/* ===== 返回按钮 ===== */
.back-btn {
    background: rgba(102, 126, 234, 0.1);
    border: none;
    padding: 12px 24px;
    border-radius: 15px;
    cursor: pointer;
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 20px;
    transition: all 0.2s;
    color: #667eea;
}

.back-btn:hover {
    background: rgba(102, 126, 234, 0.2);
    transform: translateX(-5px);
}

/* ===== 页面标题 ===== */
.page h2 {
    color: var(--text-primary);
    margin-bottom: 25px;
    font-size: 26px;
    font-weight: 800;
    display: flex;
    align-items: center;
    gap: 12px;
}

/* ===== 进度条 ===== */
.progress-bar { 
    height: 14px; 
    background: #e0e0e0; 
    border-radius: 10px; 
    overflow: hidden; 
    margin: 15px 0;
    box-shadow: inset 0 2px 5px rgba(0,0,0,0.1);
}

.progress-fill { 
    height: 100%; 
    background: linear-gradient(90deg, #667eea 0%, #764ba2 50%, #f093fb 100%); 
    border-radius: 10px; 
    transition: width 0.5s ease;
    box-shadow: 0 2px 10px rgba(102, 126, 234, 0.3);
}

/* ===== 拼音卡片 ===== */
.pinyin-card { 
    padding: 22px; 
    background: linear-gradient(135deg, rgba(255,255,255,0.95) 0%, rgba(255,255,255,0.85) 100%);
    border-radius: 20px; 
    text-align: center; 
    font-size: 24px; 
    font-weight: 700; 
    color: #667eea; 
    cursor: pointer; 
    transition: all 0.3s;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
    border: 3px solid transparent;
}

.pinyin-card:hover { 
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 12px 30px rgba(0,0,0,0.15);
    border-color: #667eea;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

/* ===== 选项按钮 ===== */
.option-btn { 
    padding: 24px; 
    background: linear-gradient(135deg, rgba(255,255,255,0.95) 0%, rgba(255,255,255,0.9) 100%);
    border: 3px solid #e0e0e0; 
    border-radius: 20px; 
    font-size: 24px; 
    cursor: pointer; 
    font-weight: 700;
    transition: all 0.3s;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}

.option-btn:hover {
    border-color: #667eea;
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.2);
}

.option-btn.correct {
    background: linear-gradient(135deg, #00b894, #00cec9) !important;
    border-color: #00b894;
    color: white;
    animation: correctPulse 0.6s ease;
}

.option-btn.wrong {
    background: linear-gradient(135deg, #ff7675, #d63031) !important;
    border-color: #ff7675;
    color: white;
    animation: shake 0.5s ease;
}

/* ===== 学习标签 ===== */
.learning-tab {
    padding: 14px 22px;
    background: rgba(255,255,255,0.7);
    border-radius: 30px;
    cursor: pointer;
    font-weight: 700;
    transition: all 0.3s;
    border: 2px solid transparent;
}

.learning-tab.active {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
    transform: scale(1.05);
}

/* ===== 统计卡片 ===== */
.stats-card {
    background: linear-gradient(135deg, rgba(255,255,255,0.95) 0%, rgba(255,255,255,0.9) 100%);
    border-radius: 24px;
    padding: 25px;
    text-align: center;
    box-shadow: 0 8px 25px rgba(0,0,0,0.08);
    transition: all 0.3s;
    border: 2px solid transparent;
}

.stats-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0,0,0,0.12);
    border-color: rgba(102, 126, 234, 0.3);
}

.stats-value {
    font-size: 36px;
    font-weight: 800;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ===== Logo图片区域 ===== */
.logo-container {
    text-align: center;
    margin-bottom: 20px;
}

.logo-container img {
    max-width: 320px;
    width: 85%;
    border-radius: 25px;
    box-shadow: 0 15px 40px rgba(0,0,0,0.15);
    border: 4px solid rgba(255,255,255,0.5);
}