/**
 * 汉字奇缘·一字一世界 - 样式文件 v3
 * 单页滚动布局 + 游戏天地 + 文档上传
 */

/* ========== 全局变量 ========== */
:root {
  --ink-black: #2c2c2c;
  --ink-deep: #1a1a1a;
  --paper: #f5f0e8;
  --paper-light: #faf6f0;
  --paper-dark: #e8e0d4;
  --cinnabar: #c0392b;
  --cinnabar-light: #e74c3c;
  --celadon: #5d8a6a;
  --gold: #d4a574;
  --gold-dark: #b89160;
  --jade: #4a7c59;
  --shadow: rgba(44, 44, 44, 0.15);
  --shadow-strong: rgba(44, 44, 44, 0.3);
  --radius: 12px;
  --radius-sm: 8px;
  --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
  background: var(--paper);
  color: var(--ink-black);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh; min-height: 100dvh;
  -webkit-text-size-adjust: 100%;
  -ms-text-size-adjust: 100%;
  overscroll-behavior-y: contain;
}
body::before {
  content: ''; position: fixed; top: 0; left: 0; right: 0; bottom: 0;
  background-image:
    radial-gradient(circle at 20% 50%, rgba(192,57,43,0.03) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(93,138,106,0.03) 0%, transparent 50%),
    radial-gradient(circle at 50% 20%, rgba(212,165,116,0.03) 0%, transparent 50%);
  pointer-events: none; z-index: 0;
}

/* ========== 动画 ========== */
@keyframes fadeIn { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeInScale { from { opacity: 0; transform: scale(0.9); } to { opacity: 1; transform: scale(1); } }
@keyframes pulse { 0%,100% { transform: scale(1); } 50% { transform: scale(1.05); } }
@keyframes bounceDown { 0%,100% { transform: translateY(0); opacity: 0.5; } 50% { transform: translateY(12px); opacity: 1; } }
@keyframes shake { 0%,100% { transform: translateX(0); } 25% { transform: translateX(-8px); } 75% { transform: translateX(8px); } }
@keyframes hpDecrease { from { width: var(--hp-from); } to { width: var(--hp-to); } }
@keyframes attackRight { 0% { transform: translateX(0); } 40% { transform: translateX(60px); } 100% { transform: translateX(0); } }
@keyframes attackLeft { 0% { transform: translateX(0); } 40% { transform: translateX(-60px); } 100% { transform: translateX(0); } }
@keyframes growUp { from { transform: scale(0.3); opacity: 0; } to { transform: scale(1); opacity: 1; } }
@keyframes sparkle { 0%,100% { opacity: 0; transform: scale(0); } 50% { opacity: 1; transform: scale(1); } }

/* ========== 顶部导航 ========== */
.top-nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 9990;
  background: rgba(250, 246, 240, 0.92); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--paper-dark);
  padding: 0.6rem 1.5rem;
  display: flex; align-items: center; justify-content: space-between;
  transform: translateY(-100%); transition: transform 0.3s ease;
}
.top-nav.visible { transform: translateY(0); }
.top-nav-brand { font-family: "STKaiti","KaiTi",serif; font-size: 1.2rem; font-weight: 700; color: var(--cinnabar); }
.top-nav-links { display: flex; gap: 1rem; flex-wrap: wrap; }
.top-nav-links a {
  font-size: 0.85rem; color: var(--ink-black); text-decoration: none;
  padding: 0.3rem 0.6rem; border-radius: 4px; transition: var(--transition);
}
.top-nav-links a:hover { background: rgba(192,57,43,0.08); color: var(--cinnabar); }

/* ========== 单页布局 ========== */
.main-scroll { position: relative; z-index: 1; }
.page-section {
  min-height: 100vh; min-height: 100dvh;
  padding-top: 0;
  animation: fadeIn 0.6s ease;
}

/* ========== 首页 ========== */
.home-section {
  background: linear-gradient(135deg, var(--paper) 0%, var(--paper-light) 50%, var(--paper-dark) 100%);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: 4rem 1rem 2rem; text-align: center;
  min-height: 100vh; min-height: 100dvh;
  position: relative; overflow: hidden;
}
.home-canvas {
  position: absolute; top: 0; left: 0; width: 100%; height: 100%; z-index: 0; pointer-events: none;
}
.home-content { position: relative; z-index: 2; max-width: 900px; width: 100%; }
.home-seal {
  display: inline-block; width: 80px; height: 80px; background: var(--cinnabar);
  color: var(--paper-light); border-radius: 8px; font-size: 2.5rem; font-weight: bold;
  line-height: 80px; margin-bottom: 1.5rem; box-shadow: 0 4px 15px rgba(192,57,43,0.3);
  transform: rotate(-5deg); animation: fadeInScale 0.8s ease;
}
.home-title {
  font-size: clamp(2.5rem, 6vw, 4.5rem); font-weight: 700; color: var(--ink-deep);
  margin-bottom: 0.5rem; letter-spacing: 0.1em;
  font-family: "STKaiti","KaiTi","Noto Serif SC",serif; animation: fadeIn 1s ease 0.2s both;
}
.home-subtitle {
  font-size: clamp(1rem, 3vw, 1.5rem); color: var(--celadon);
  margin-bottom: 1rem; letter-spacing: 0.3em; animation: fadeIn 1s ease 0.4s both;
}
.home-divider {
  width: 200px; height: 2px; background: linear-gradient(90deg, transparent, var(--cinnabar), transparent);
  margin: 1.5rem auto; animation: fadeIn 1s ease 0.6s both;
}

/* ========== 作者信息印章 ========== */
.author-seal {
  display: flex; flex-direction: column; gap: 0.3rem;
  width: fit-content; margin: 0 auto 1.5rem;
  background: var(--cinnabar); color: #fff;
  padding: 0.8rem 1.8rem; border-radius: 6px;
  font-family: "STKaiti","KaiTi",serif;
  box-shadow: 0 4px 15px rgba(192,57,43,0.35);
  transform: rotate(-2deg);
  animation: fadeInScale 0.8s ease 0.7s both;
  border: 2px solid rgba(255,255,255,0.3);
  position: relative;
}
.author-seal::before {
  content: ''; position: absolute; top: 3px; left: 3px; right: 3px; bottom: 3px;
  border: 1px solid rgba(255,255,255,0.4); border-radius: 4px; pointer-events: none;
}
.author-seal-row {
  display: flex; align-items: center; gap: 0.8rem; position: relative; z-index: 1;
}
.author-seal-label {
  font-size: 0.85rem; opacity: 0.85; letter-spacing: 0.15em; white-space: nowrap;
}
.author-seal-value {
  font-size: 1.15rem; font-weight: 700; letter-spacing: 0.05em; white-space: nowrap;
}

/* ========== 学生信息签到区 ========== */
.home-student-info {
  background: rgba(255,255,255,0.6); backdrop-filter: blur(10px);
  border: 1px solid rgba(192,57,43,0.2); border-radius: var(--radius);
  padding: 1.2rem 2rem; margin: 1.5rem auto; display: inline-block;
  animation: fadeIn 1s ease 0.8s both; min-width: 300px;
}
.student-row { display: flex; align-items: center; margin: 0.4rem 0; gap: 0.5rem; }
.student-label { color: var(--cinnabar); font-weight: 600; font-size: 1rem; white-space: nowrap; min-width: 50px; text-align: right; }
.student-input {
  flex: 1; background: rgba(255,255,255,0.8); border: 2px solid var(--paper-dark);
  border-radius: 8px; padding: 0.5rem 0.8rem; font-size: 1rem; color: var(--ink-black);
  font-family: "PingFang SC","Microsoft YaHei",sans-serif; transition: var(--transition);
  outline: none; min-width: 140px;
}
.student-input:focus { border-color: var(--cinnabar); background: #fff; box-shadow: 0 0 0 3px rgba(192,57,43,0.1); }
.student-input::placeholder { color: #bbb; font-size: 0.9rem; }

.student-confirm-btn {
  display: block; margin: 0.8rem auto 0; background: var(--cinnabar); color: #fff;
  border: none; padding: 0.6rem 2rem; border-radius: 25px; font-size: 1rem;
  cursor: pointer; transition: var(--transition); font-weight: 600;
}
.student-confirm-btn:hover { background: var(--cinnabar-light); transform: scale(1.05); }
.student-confirm-btn.confirmed { background: var(--celadon); pointer-events: none; }
.student-switch-btn {
  display: block; margin: 0.4rem auto 0; background: transparent; color: var(--cinnabar);
  border: 1px solid var(--cinnabar); padding: 0.4rem 1.5rem; border-radius: 20px;
  font-size: 0.85rem; cursor: pointer; transition: var(--transition);
}
.student-switch-btn:hover { background: rgba(192,57,43,0.08); }
.student-status {
  text-align: center; margin-top: 0.5rem; font-size: 0.85rem;
  color: var(--celadon); min-height: 1.2rem;
}

.home-intro {
  font-size: clamp(0.9rem, 2vw, 1.1rem); color: var(--ink-black);
  max-width: 600px; margin: 1.5rem auto 2rem; line-height: 2; animation: fadeIn 1s ease 1s both;
}

/* 导航卡片 */
.nav-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1.2rem; margin-top: 2rem; animation: fadeIn 1s ease 1.2s both;
}
.nav-card {
  background: rgba(255,255,255,0.7); backdrop-filter: blur(10px);
  border: 2px solid transparent; border-radius: var(--radius); padding: 1.8rem 0.8rem;
  cursor: pointer; transition: var(--transition); text-align: center;
  position: relative; overflow: hidden;
}
.nav-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px;
  background: var(--accent-color, var(--cinnabar)); transform: scaleX(0);
  transition: transform 0.4s ease; transform-origin: left;
}
.nav-card:hover { transform: translateY(-8px); box-shadow: 0 12px 30px var(--shadow-strong); border-color: var(--accent-color, var(--cinnabar)); background: rgba(255,255,255,0.9); }
.nav-card:hover::before { transform: scaleX(1); }
.nav-card-icon { font-size: 2.2rem; font-family: "STKaiti","KaiTi",serif; color: var(--accent-color, var(--cinnabar)); margin-bottom: 0.5rem; display: block; }
.nav-card-title { font-size: 1.1rem; font-weight: 600; color: var(--ink-deep); margin-bottom: 0.3rem; }
.nav-card-desc { font-size: 0.8rem; color: #666; }
.nav-card[data-target="evolution-sec"] { --accent-color: var(--cinnabar); }
.nav-card[data-target="tone-sec"] { --accent-color: var(--celadon); }
.nav-card[data-target="culture-sec"] { --accent-color: var(--gold-dark); }
.nav-card[data-target="quiz-sec"] { --accent-color: var(--jade); }
.nav-card[data-target="game-sec"] { --accent-color: #8e44ad; }

/* ========== 通用页面头 ========== */
.page-header {
  background: linear-gradient(135deg, var(--ink-deep), var(--ink-black));
  color: var(--paper-light); padding: 2.5rem 1.5rem 1.5rem; text-align: center;
  position: relative; overflow: hidden;
}
.page-header::after {
  content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--cinnabar), var(--gold), var(--celadon));
}
.page-header h2 { font-size: clamp(1.5rem, 4vw, 2.2rem); font-family: "STKaiti","KaiTi",serif; margin-bottom: 0.3rem; letter-spacing: 0.1em; }
.page-header p { font-size: 0.95rem; opacity: 0.8; }

/* 板块返回按钮 */
.section-back-btn {
  position: sticky; top: 0; z-index: 100; display: block; width: 100%;
  background: rgba(250, 246, 240, 0.95); backdrop-filter: blur(8px);
  border: none; border-bottom: 1px solid var(--paper-dark);
  padding: 0.7rem 1.5rem; font-size: 0.9rem; cursor: pointer;
  color: var(--cinnabar); text-align: left; transition: var(--transition);
  font-weight: 600;
}
.section-back-btn:hover { background: var(--paper-dark); color: var(--cinnabar-light); }

.page-content { max-width: 1000px; margin: 0 auto; padding: 2rem 1rem; }

/* ========== 字源探秘 ========== */
.char-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); gap: 1rem; margin-bottom: 2rem; }
.char-card {
  background: var(--paper-light); border: 2px solid var(--paper-dark);
  border-radius: var(--radius); padding: 1.2rem 0.5rem; text-align: center;
  cursor: pointer; transition: var(--transition); position: relative; overflow: hidden;
}
.char-card:hover { border-color: var(--cinnabar); transform: translateY(-5px); box-shadow: 0 8px 20px var(--shadow); }
.char-card.active { border-color: var(--cinnabar); background: linear-gradient(135deg, var(--paper-light), rgba(192,57,43,0.05)); }
.char-card-char { font-size: 2.5rem; font-family: "STKaiti","KaiTi","Noto Serif SC",serif; color: var(--ink-deep); line-height: 1; margin-bottom: 0.5rem; }
.char-card-pinyin { font-size: 0.8rem; color: var(--cinnabar); font-style: italic; }

.evolution-display {
  background: var(--paper-light); border-radius: var(--radius);
  padding: 2rem 1.5rem; box-shadow: 0 4px 15px var(--shadow); animation: fadeInScale 0.5s ease;
}
.evolution-header { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 1rem; margin-bottom: 2rem; padding-bottom: 1rem; border-bottom: 2px solid var(--paper-dark); }
.evolution-title { display: flex; align-items: baseline; gap: 1rem; }
.evolution-title .big-char { font-size: 3rem; font-family: "STKaiti","KaiTi",serif; color: var(--ink-deep); line-height: 1; }
.evolution-title .char-pinyin { font-size: 1.1rem; color: var(--cinnabar); font-style: italic; }
.evolution-title .char-meaning { font-size: 0.85rem; color: #666; }
.evolution-title .char-info { display: flex; flex-direction: column; gap: 0.2rem; }
.evolution-meta { display: flex; gap: 1rem; flex-wrap: wrap; }
.meta-tag { background: var(--paper-dark); padding: 0.3rem 0.8rem; border-radius: 20px; font-size: 0.8rem; color: var(--ink-black); }

.evolution-timeline { display: flex; overflow-x: auto; gap: 0; margin: 2rem 0; padding-bottom: 1rem; }
.evolution-timeline::-webkit-scrollbar { height: 6px; }
.evolution-timeline::-webkit-scrollbar-track { background: var(--paper-dark); border-radius: 3px; }
.evolution-timeline::-webkit-scrollbar-thumb { background: var(--cinnabar); border-radius: 3px; }
.evolution-stage { flex: 1; min-width: 150px; text-align: center; position: relative; cursor: pointer; padding: 0 0.5rem; }
.evolution-stage::after { content: ''; position: absolute; top: 60px; right: 0; width: 100%; height: 3px; background: var(--paper-dark); z-index: 0; }
.evolution-stage:last-child::after { display: none; }
.evolution-stage.active::after { background: var(--cinnabar); }
.stage-dot { width: 16px; height: 16px; border-radius: 50%; background: var(--paper-dark); border: 3px solid var(--paper-light); margin: 0 auto; position: relative; z-index: 1; transition: var(--transition); }
.evolution-stage.active .stage-dot { background: var(--cinnabar); transform: scale(1.3); box-shadow: 0 0 0 4px rgba(192,57,43,0.2); }
.stage-name { font-size: 0.85rem; font-weight: 600; color: var(--ink-black); margin-top: 0.5rem; }
.stage-period { font-size: 0.7rem; color: #999; margin-top: 0.2rem; }

.evolution-detail { background: var(--paper); border-radius: var(--radius); padding: 2rem; text-align: center; margin-top: 1.5rem; border: 1px solid var(--paper-dark); }
.stage-svg-container { width: 120px; height: 120px; margin: 0 auto 1rem; display: flex; align-items: center; justify-content: center; color: var(--ink-deep); }
.stage-svg-container svg, .stage-svg-container .kaishu-char { width: 100%; height: 100%; }
.stage-svg-container .kaishu-char { font-size: 5rem; font-family: "STKaiti","KaiTi","Noto Serif SC",serif; display: flex; align-items: center; justify-content: center; color: var(--ink-deep); }
.stage-desc { font-size: 0.95rem; color: var(--ink-black); line-height: 1.8; max-width: 500px; margin: 0 auto; }

.char-story { background: rgba(212,165,116,0.08); border-left: 4px solid var(--gold); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; padding: 1.5rem; margin: 1.5rem 0; }
.char-story h4 { color: var(--gold-dark); font-size: 1.1rem; margin-bottom: 0.5rem; }
.char-story p { font-size: 0.95rem; line-height: 2; text-align: justify; }
.char-section { margin: 1.5rem 0; }
.char-section h4 { font-size: 1.1rem; color: var(--ink-deep); margin-bottom: 0.8rem; padding-bottom: 0.5rem; border-bottom: 2px solid var(--paper-dark); }
.word-tags { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.word-tag { background: var(--paper); border: 1px solid var(--paper-dark); padding: 0.4rem 1rem; border-radius: 20px; font-size: 0.9rem; color: var(--ink-black); transition: var(--transition); cursor: default; }
.word-tag:hover { background: var(--cinnabar); color: var(--paper-light); border-color: var(--cinnabar); transform: translateY(-2px); }
.phrase-tags .word-tag { background: rgba(192,57,43,0.08); border-color: rgba(192,57,43,0.2); color: var(--cinnabar); font-family: "STKaiti","KaiTi",serif; }
.char-composition { background: rgba(93,138,106,0.08); border-left: 4px solid var(--celadon); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; padding: 1rem 1.5rem; font-size: 0.9rem; line-height: 1.8; }

/* ========== 声调练习 ========== */
.tone-intro { background: var(--paper-light); border-radius: var(--radius); padding: 1.5rem; text-align: center; margin-bottom: 2rem; box-shadow: 0 4px 15px var(--shadow); }
.tone-intro p { font-size: 1rem; color: var(--ink-black); line-height: 1.8; }
.tone-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1.5rem; margin-bottom: 2rem; }
.tone-card { background: var(--paper-light); border: 2px solid var(--paper-dark); border-radius: var(--radius); padding: 1.5rem; text-align: center; transition: var(--transition); cursor: pointer; }
.tone-card:hover { transform: translateY(-5px); box-shadow: 0 8px 20px var(--shadow); }
.tone-card[data-tone="1"] { border-top: 4px solid #e74c3c; } .tone-card[data-tone="2"] { border-top: 4px solid #e67e22; }
.tone-card[data-tone="3"] { border-top: 4px solid #2ecc71; } .tone-card[data-tone="4"] { border-top: 4px solid #3498db; }
.tone-card-name { font-size: 1rem; font-weight: 600; color: var(--ink-deep); margin-bottom: 0.3rem; }
.tone-card-symbol { font-size: 2rem; color: var(--cinnabar); margin-bottom: 0.5rem; }
.tone-curve { width: 100%; height: 60px; margin: 0.5rem 0; }
.tone-card-pitch { font-size: 0.8rem; color: #999; margin-bottom: 0.5rem; }
.tone-card-desc { font-size: 0.85rem; color: #666; margin-bottom: 0.8rem; line-height: 1.5; }
.tone-examples { display: flex; justify-content: center; gap: 0.8rem; flex-wrap: wrap; }
.tone-example { background: var(--paper); border-radius: var(--radius-sm); padding: 0.3rem 0.6rem; font-size: 0.85rem; }
.tone-example .pinyin { color: var(--cinnabar); font-weight: 600; }
.tone-example .char { font-size: 1.1rem; font-family: "STKaiti",serif; margin: 0 0.2rem; }
.tone-play-btn {
  background: var(--celadon); color: #fff; border: none; padding: 0.4rem 1.2rem;
  border-radius: 20px; cursor: pointer; font-size: 1rem; transition: var(--transition); margin-top: 0.8rem;
}
.tone-play-btn:hover { background: var(--jade); transform: scale(1.05); }
.tone-play-btn.playing { animation: pulse 1s infinite; background: var(--cinnabar); }

.tone-practice { background: var(--paper-light); border-radius: var(--radius); padding: 2rem 1.5rem; box-shadow: 0 4px 15px var(--shadow); }
.tone-practice-header { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 1rem; margin-bottom: 1.5rem; }
.tone-practice-header h3 { font-size: 1.3rem; color: var(--ink-deep); }
.tone-score { background: var(--cinnabar); color: var(--paper-light); padding: 0.5rem 1.5rem; border-radius: 20px; font-weight: 600; }
.tone-game-area { text-align: center; padding: 2rem 1rem; }
.tone-game-question { font-size: 1.2rem; color: var(--ink-black); margin-bottom: 1.5rem; }
.tone-game-char { font-size: 5rem; font-family: "STKaiti","KaiTi",serif; color: var(--ink-deep); margin: 1rem 0; }
.tone-game-options { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; max-width: 500px; margin: 0 auto; }
.tone-option {
  background: var(--paper); border: 2px solid var(--paper-dark); border-radius: var(--radius-sm);
  padding: 1rem; cursor: pointer; transition: var(--transition); font-size: 1rem;
}
.tone-option:hover { border-color: var(--celadon); background: rgba(93,138,106,0.05); }
.tone-option.correct { background: rgba(46,204,113,0.15); border-color: #2ecc71; color: #27ae60; }
.tone-option.wrong { background: rgba(231,76,60,0.15); border-color: #e74c3c; color: #c0392b; }
.tone-feedback { margin-top: 1rem; font-size: 0.95rem; min-height: 2rem; color: var(--celadon); }
.tone-progress { display: flex; justify-content: center; gap: 0.5rem; margin-top: 1rem; }
.progress-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--paper-dark); transition: var(--transition); }
.progress-dot.active { background: var(--cinnabar); transform: scale(1.3); }
.progress-dot.correct { background: #2ecc71; } .progress-dot.wrong { background: #e74c3c; }

/* ========== 文化万花筒 ========== */
.culture-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1.5rem; margin-bottom: 2rem; }
.culture-card { background: var(--paper-light); border-radius: var(--radius); overflow: hidden; cursor: pointer; transition: var(--transition); box-shadow: 0 4px 15px var(--shadow); }
.culture-card:hover { transform: translateY(-8px); box-shadow: 0 12px 30px var(--shadow-strong); }
.culture-card-banner { height: 100px; display: flex; align-items: center; justify-content: center; font-size: 3.5rem; font-family: "STKaiti","KaiTi",serif; color: var(--paper-light); }
.culture-card-body { padding: 1.5rem; }
.culture-card-title { font-size: 1.3rem; font-weight: 600; color: var(--ink-deep); margin-bottom: 0.3rem; }
.culture-card-subtitle { font-size: 0.85rem; color: var(--cinnabar); margin-bottom: 0.8rem; }
.culture-card-desc { font-size: 0.9rem; color: #555; line-height: 1.6; }
.culture-detail { background: var(--paper-light); border-radius: var(--radius); padding: 2rem 1.5rem; box-shadow: 0 4px 15px var(--shadow); animation: fadeInScale 0.5s ease; }
.culture-detail-header { text-align: center; margin-bottom: 2rem; padding-bottom: 1.5rem; border-bottom: 2px solid var(--paper-dark); }
.culture-detail-icon { width: 80px; height: 80px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 2.5rem; font-family: "STKaiti","KaiTi",serif; color: var(--paper-light); margin: 0 auto 1rem; }
.culture-detail-title { font-size: 1.8rem; color: var(--ink-deep); margin-bottom: 0.3rem; }
.culture-detail-subtitle { font-size: 1rem; color: #888; }
.culture-section { margin: 1.5rem 0; }
.culture-section h4 { font-size: 1.1rem; color: var(--cinnabar); margin-bottom: 0.5rem; display: flex; align-items: center; gap: 0.5rem; }
.culture-section h4::before { content: ''; width: 4px; height: 20px; background: var(--cinnabar); border-radius: 2px; }
.culture-section p { font-size: 0.95rem; line-height: 2; text-align: justify; padding-left: 1rem; }
.culture-related { margin-top: 2rem; padding: 1.5rem; background: rgba(212,165,116,0.08); border-radius: var(--radius-sm); }
.culture-related h4 { font-size: 1rem; color: var(--gold-dark); margin-bottom: 0.8rem; }
.related-chars { display: flex; gap: 1rem; flex-wrap: wrap; }
.related-char { width: 50px; height: 50px; display: flex; align-items: center; justify-content: center; background: var(--paper-light); border: 2px solid var(--gold); border-radius: 50%; font-size: 1.5rem; font-family: "STKaiti",serif; color: var(--ink-deep); cursor: pointer; transition: var(--transition); }
.related-char:hover { background: var(--gold); color: var(--paper-light); transform: scale(1.1); }
.culture-keywords { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 1rem; }
.keyword-tag { background: var(--paper); border: 1px solid var(--paper-dark); padding: 0.3rem 0.8rem; border-radius: 15px; font-size: 0.8rem; color: var(--celadon); }

/* ========== 闯关挑战 ========== */
.quiz-start { text-align: center; padding: 3rem 1.5rem; background: var(--paper-light); border-radius: var(--radius); box-shadow: 0 4px 15px var(--shadow); }
.quiz-start h3 { font-size: 1.8rem; color: var(--ink-deep); margin-bottom: 1rem; }
.quiz-start p { font-size: 1rem; color: #555; margin-bottom: 2rem; line-height: 1.8; }
.quiz-categories { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 1rem; margin: 2rem 0; }
.quiz-cat-card { background: var(--paper); border: 2px solid var(--paper-dark); border-radius: var(--radius); padding: 1.5rem 1rem; text-align: center; cursor: pointer; transition: var(--transition); }
.quiz-cat-card:hover { border-color: var(--jade); transform: translateY(-5px); box-shadow: 0 8px 20px var(--shadow); }
.quiz-cat-card.selected { border-color: var(--jade); background: rgba(74,124,89,0.05); }
.quiz-cat-icon { font-size: 2.5rem; font-family: "STKaiti",serif; color: var(--jade); margin-bottom: 0.5rem; }
.quiz-cat-name { font-size: 1rem; font-weight: 600; color: var(--ink-deep); }
.quiz-cat-desc { font-size: 0.8rem; color: #888; margin-top: 0.3rem; }

.quiz-btn {
  background: var(--cinnabar); color: var(--paper-light); border: none;
  padding: 0.8rem 2.5rem; border-radius: 30px; font-size: 1.1rem;
  cursor: pointer; transition: var(--transition); font-weight: 600; letter-spacing: 0.1em;
}
.quiz-btn:hover { background: var(--cinnabar-light); transform: scale(1.05); box-shadow: 0 6px 20px rgba(192,57,43,0.3); }
.quiz-btn:disabled { background: #ccc; cursor: not-allowed; transform: none; box-shadow: none; }
.quiz-btn-secondary { background: var(--paper); color: var(--ink-deep); border: 2px solid var(--paper-dark); }
.quiz-btn-secondary:hover { background: var(--paper-dark); }

.quiz-game { background: var(--paper-light); border-radius: var(--radius); padding: 2rem 1.5rem; box-shadow: 0 4px 15px var(--shadow); }
.quiz-status { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.5rem; flex-wrap: wrap; gap: 1rem; }
.quiz-question-num { font-size: 1rem; color: var(--ink-deep); }
.quiz-question-num .current { color: var(--cinnabar); font-weight: 700; font-size: 1.3rem; }
.quiz-timer { background: var(--ink-deep); color: var(--paper-light); padding: 0.4rem 1rem; border-radius: 20px; font-size: 0.9rem; }
.quiz-score-display { background: var(--gold); color: var(--paper-light); padding: 0.4rem 1rem; border-radius: 20px; font-size: 0.9rem; font-weight: 600; }
.quiz-question { font-size: 1.3rem; color: var(--ink-deep); text-align: center; margin: 2rem 0 1.5rem; line-height: 1.6; }
.quiz-options { display: grid; gap: 1rem; max-width: 500px; margin: 0 auto; }
.quiz-option {
  background: var(--paper); border: 2px solid var(--paper-dark); border-radius: var(--radius-sm);
  padding: 1rem 1.5rem; cursor: pointer; transition: var(--transition); font-size: 1rem;
  text-align: left; display: flex; align-items: center; gap: 1rem;
}
.quiz-option:hover:not(.disabled) { border-color: var(--celadon); background: rgba(93,138,106,0.05); transform: translateX(5px); }
.quiz-option .option-label { width: 32px; height: 32px; border-radius: 50%; background: var(--paper-dark); display: flex; align-items: center; justify-content: center; font-weight: 600; color: var(--ink-deep); flex-shrink: 0; }
.quiz-option:hover:not(.disabled) .option-label { background: var(--celadon); color: var(--paper-light); }
.quiz-option.correct { background: rgba(46,204,113,0.15); border-color: #2ecc71; }
.quiz-option.correct .option-label { background: #2ecc71; color: var(--paper-light); }
.quiz-option.wrong { background: rgba(231,76,60,0.15); border-color: #e74c3c; }
.quiz-option.wrong .option-label { background: #e74c3c; color: var(--paper-light); }
.quiz-option.disabled { cursor: not-allowed; }
.quiz-explanation { background: rgba(93,138,106,0.08); border-left: 4px solid var(--celadon); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; padding: 1rem 1.5rem; margin-top: 1.5rem; font-size: 0.9rem; line-height: 1.8; display: none; }
.quiz-explanation.show { display: block; animation: fadeIn 0.4s ease; }
.quiz-next-btn { display: none; margin: 1.5rem auto 0; background: var(--ink-deep); color: var(--paper-light); border: none; padding: 0.6rem 2rem; border-radius: 25px; font-size: 1rem; cursor: pointer; transition: var(--transition); }
.quiz-next-btn.show { display: block; animation: fadeIn 0.4s ease; }

/* 结果 */
.quiz-result { text-align: center; padding: 3rem 1.5rem; }
.quiz-result-score { font-size: 4rem; font-weight: 700; color: var(--cinnabar); margin-bottom: 0.5rem; }
.quiz-result-total { font-size: 1.5rem; color: #999; }
.quiz-result-title { font-size: 1.8rem; color: var(--ink-deep); margin: 1.5rem 0 0.5rem; font-family: "STKaiti",serif; }
.quiz-result-msg { font-size: 1rem; color: #555; margin-bottom: 2rem; }
.quiz-result-stats { display: flex; justify-content: center; gap: 2rem; margin: 1.5rem 0 2rem; flex-wrap: wrap; }
.quiz-stat { text-align: center; }
.quiz-stat-num { font-size: 2rem; font-weight: 700; }
.quiz-stat-num.correct { color: #2ecc71; } .quiz-stat-num.wrong { color: #e74c3c; }
.quiz-stat-label { font-size: 0.85rem; color: #888; margin-top: 0.2rem; }
.quiz-result-btns { display: flex; justify-content: center; gap: 1rem; flex-wrap: wrap; }

/* ========== 🎮 游戏天地 ========== */
.game-header-bg { background: linear-gradient(135deg, #2c1810, #4a2c17, #2c1810); }
.game-section .page-content { max-width: 1000px; }

.game-select { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.5rem; margin: 1rem 0; }
.game-select-card {
  background: var(--paper-light); border: 2px solid var(--paper-dark); border-radius: var(--radius);
  padding: 2rem 1.5rem; text-align: center; cursor: pointer; transition: var(--transition);
  box-shadow: 0 4px 15px var(--shadow);
}
.game-select-card:hover { transform: translateY(-8px); box-shadow: 0 12px 30px var(--shadow-strong); border-color: var(--cinnabar); }
.game-card-icon { font-size: 3rem; margin-bottom: 1rem; }
.game-card-title { font-size: 1.3rem; font-weight: 600; color: var(--ink-deep); margin-bottom: 0.5rem; }
.game-card-desc { font-size: 0.9rem; color: #666; line-height: 1.6; }

/* 返回按钮 */
.back-btn-inline {
  display: inline-block; background: none; border: 1px solid var(--paper-dark);
  padding: 0.5rem 1rem; border-radius: 20px; cursor: pointer; font-size: 0.9rem;
  color: var(--ink-black); margin-bottom: 1rem; transition: var(--transition);
}
.back-btn-inline:hover { background: var(--paper-dark); }

.game-area { padding: 1rem 0; animation: fadeIn 0.5s ease; }

/* ===== 打怪游戏 ===== */
.battle-scene {
  background: linear-gradient(to bottom, #1a0a0a, #2c1810, #3d2817);
  border-radius: var(--radius); padding: 2rem 1.5rem; color: #f0d9b5;
  max-width: 700px; margin: 0 auto; box-shadow: 0 8px 30px rgba(0,0,0,0.3);
}
.battle-header { text-align: center; margin-bottom: 1.5rem; }
.battle-title { font-size: 1.5rem; font-family: "STKaiti",serif; color: #e8b84b; margin-bottom: 0.3rem; }
.battle-subtitle { font-size: 0.9rem; color: #b8a080; }
.battle-stage { display: flex; justify-content: center; gap: 0.5rem; margin: 0.5rem 0; flex-wrap: wrap; }
.battle-stage-dot { width: 12px; height: 12px; border-radius: 50%; background: #3d2817; }
.battle-stage-dot.defeated { background: #e8b84b; }
.battle-stage-dot.current { background: #e74c3c; animation: pulse 1s infinite; }

.battle-arena { display: flex; justify-content: space-around; align-items: center; margin: 1.5rem 0; gap: 1rem; }
.battle-fighter { text-align: center; flex: 1; }
.battle-fighter-icon { font-size: 3.5rem; margin-bottom: 0.5rem; transition: transform 0.3s ease; }
.battle-fighter-name { font-size: 0.9rem; font-weight: 600; margin-bottom: 0.3rem; }
.battle-fighter-hp-label { font-size: 0.75rem; color: #b8a080; margin-bottom: 0.3rem; }
.battle-hp-bar {
  width: 100%; height: 12px; background: rgba(255,255,255,0.1); border-radius: 6px;
  overflow: hidden; margin: 0 auto; max-width: 200px;
}
.battle-hp-fill {
  height: 100%; background: linear-gradient(90deg, #e74c3c, #2ecc71); border-radius: 6px;
  transition: width 0.5s ease;
}
.battle-hp-fill.danger { background: linear-gradient(90deg, #e74c3c, #c0392b); }
.battle-damage {
  position: absolute; font-weight: 700; font-size: 1.2rem;
  animation: fadeIn 0.3s ease forwards; pointer-events: none;
}

.battle-vs { font-size: 2rem; color: #e8b84b; font-family: "STKaiti",serif; }

.battle-question-area {
  background: rgba(255,255,255,0.08); border-radius: var(--radius-sm);
  padding: 1.5rem; margin: 1rem 0; border: 1px solid rgba(232,184,75,0.3);
}
.battle-question-text { font-size: 1.1rem; text-align: center; margin-bottom: 1rem; color: #f0d9b5; }
.battle-options { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0.8rem; }
.battle-option {
  background: rgba(255,255,255,0.05); border: 1px solid rgba(232,184,75,0.3);
  border-radius: var(--radius-sm); padding: 0.8rem 1rem; cursor: pointer;
  transition: var(--transition); color: #f0d9b5; font-size: 0.9rem; text-align: left;
}
.battle-option:hover { background: rgba(232,184,75,0.15); border-color: #e8b84b; }
.battle-option.correct { background: rgba(46,204,113,0.2); border-color: #2ecc71; }
.battle-option.wrong { background: rgba(231,76,60,0.2); border-color: #e74c3c; }
.battle-option.disabled { pointer-events: none; }
.battle-feedback {
  text-align: center; margin-top: 1rem; font-size: 0.95rem; min-height: 1.5rem;
  font-family: "STKaiti",serif;
}

.battle-result { text-align: center; padding: 2rem 1rem; }
.battle-result-icon { font-size: 4rem; margin-bottom: 1rem; }
.battle-result-title { font-size: 1.5rem; font-family: "STKaiti",serif; color: #e8b84b; margin-bottom: 0.5rem; }
.battle-result-stats { color: #b8a080; margin-bottom: 1.5rem; }
.battle-continue-btn {
  background: #e8b84b; color: #1a0a0a; border: none; padding: 0.8rem 2.5rem;
  border-radius: 30px; font-size: 1.1rem; cursor: pointer; font-weight: 600;
  transition: var(--transition);
}
.battle-continue-btn:hover { transform: scale(1.05); }

/* ===== 农场游戏 ===== */
.farm-scene {
  background: linear-gradient(to bottom, #87CEEB 0%, #98FB98 60%, #8B7355 100%);
  border-radius: var(--radius); padding: 2rem 1.5rem; color: var(--ink-deep);
  max-width: 700px; margin: 0 auto; box-shadow: 0 8px 30px rgba(0,0,0,0.2);
  min-height: 500px;
}
.farm-header { text-align: center; margin-bottom: 1.5rem; }
.farm-title { font-size: 1.5rem; font-family: "STKaiti",serif; color: #2c5f2d; margin-bottom: 0.3rem; }
.farm-subtitle { font-size: 0.9rem; color: #4a7c59; }

.farm-field {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem;
  max-width: 500px; margin: 0 auto 1.5rem;
}
.farm-plot {
  aspect-ratio: 1; background: rgba(139,115,85,0.3); border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center; font-size: 2rem;
  cursor: pointer; transition: var(--transition); border: 2px dashed rgba(139,115,85,0.4);
  position: relative; overflow: hidden;
}
.farm-plot:hover { border-color: #2c5f2d; background: rgba(44,95,45,0.1); transform: scale(1.05); }
.farm-plot.empty { color: #8B7355; font-size: 1.5rem; }
.farm-plot.growing { border-style: solid; border-color: #2c5f2d; background: rgba(44,95,45,0.15); }
.farm-plot.ripe { border-color: #e8b84b; background: rgba(232,184,75,0.2); animation: pulse 2s infinite; }
.farm-plot.harvested { background: rgba(139,115,85,0.2); border-color: transparent; }
.farm-plot-label { position: absolute; bottom: 2px; font-size: 0.6rem; color: #4a7c59; font-weight: 600; }
.farm-plot-glow {
  position: absolute; top: 0; left: 0; right: 0; bottom: 0;
  background: radial-gradient(circle, rgba(232,184,75,0.4), transparent);
  animation: sparkle 2s infinite;
}

.farm-active-crop {
  background: rgba(255,255,255,0.7); border-radius: var(--radius-sm);
  padding: 1.5rem; text-align: center; margin-bottom: 1rem;
  border: 1px solid rgba(44,95,45,0.3);
}
.farm-crop-info { display: flex; align-items: center; justify-content: center; gap: 1rem; margin-bottom: 0.5rem; }
.farm-crop-icon-big { font-size: 3rem; }
.farm-crop-name { font-size: 1.8rem; font-family: "STKaiti",serif; color: #2c5f2d; }
.farm-crop-pinyin { font-size: 1rem; color: var(--cinnabar); }
.farm-crop-stage { display: flex; justify-content: center; gap: 0.8rem; margin: 0.8rem 0; }
.farm-crop-stage span { font-size: 1.5rem; opacity: 0.3; transition: opacity 0.5s ease; }
.farm-crop-stage span.reached { opacity: 1; transform: scale(1.2); }
.farm-crop-stage span.current { animation: pulse 1s infinite; }

.farm-question-area {
  background: rgba(255,255,255,0.7); border-radius: var(--radius-sm);
  padding: 1.5rem; margin: 1rem 0;
}
.farm-water-bar { display: flex; gap: 0.3rem; justify-content: center; margin: 0.5rem 0; }
.farm-water-drop { font-size: 1.2rem; opacity: 0.2; transition: opacity 0.3s ease; }
.farm-water-drop.filled { opacity: 1; }

.farm-diff-label {
  text-align: center; font-size: 0.8rem; padding: 0.2rem 0.5rem;
  background: rgba(44,95,45,0.08); border-radius: 12px; color: #2c5f2d;
  margin: 0.3rem 0; display: inline-block; width: 100%;
}

/* ===== 文档上传 ===== */
.doc-upload-area { background: var(--paper-light); border-radius: var(--radius); padding: 2rem 1.5rem; box-shadow: 0 4px 15px var(--shadow); margin: 1.5rem 0; }
.doc-upload-area h3 { font-size: 1.3rem; color: var(--ink-deep); margin-bottom: 0.5rem; }
.upload-method { margin: 1.5rem 0; padding: 1.5rem; background: var(--paper); border-radius: var(--radius-sm); border: 1px solid var(--paper-dark); }
.upload-method h4 { font-size: 1rem; color: var(--ink-deep); margin-bottom: 0.5rem; }

.server-status { display: flex; align-items: center; gap: 0.5rem; margin-bottom: 0.5rem; font-size: 0.85rem; color: #888; }
.status-dot { width: 8px; height: 8px; border-radius: 50%; background: #ccc; display: inline-block; }
.status-dot.online { background: #2ecc71; }
.status-dot.offline { background: #e74c3c; }

.doc-upload-btn { display: inline-block; background: var(--celadon); color: #fff; border: none; padding: 0.8rem 2rem; border-radius: 25px; cursor: pointer; font-size: 1rem; transition: var(--transition); width: auto; }
.doc-upload-btn:hover { background: var(--jade); transform: scale(1.05); }

.upload-progress { margin-top: 1rem; text-align: center; }
.progress-bar { width: 100%; height: 8px; background: var(--paper-dark); border-radius: 4px; overflow: hidden; margin-bottom: 0.5rem; }
.progress-fill { height: 100%; background: var(--celadon); border-radius: 4px; width: 0; transition: width 0.3s ease; }

.parse-result { margin-top: 1.5rem; background: rgba(46,204,113,0.05); border-radius: var(--radius-sm); padding: 1.5rem; border: 1px solid rgba(46,204,113,0.3); }
.parse-result h4 { color: #27ae60; margin-bottom: 1rem; }
.parse-questions { max-height: 300px; overflow-y: auto; }
.parse-question-item { background: var(--paper); border-radius: var(--radius-sm); padding: 0.8rem 1rem; margin-bottom: 0.5rem; font-size: 0.9rem; border: 1px solid var(--paper-dark); }
.parse-question-item .pq-q { font-weight: 600; color: var(--ink-deep); }
.parse-question-item .pq-a { font-size: 0.8rem; color: var(--celadon); margin-top: 0.3rem; }

/* ========== 成就系统 ========== */
.achievement-toast {
  position: fixed; top: 20px; right: 20px; z-index: 9999;
  background: var(--ink-deep); color: var(--paper-light);
  padding: 1rem 1.5rem; border-radius: var(--radius);
  box-shadow: 0 8px 25px rgba(0,0,0,0.2);
  display: flex; align-items: center; gap: 1rem;
  transform: translateX(400px); transition: transform 0.5s ease; max-width: 320px;
}
.achievement-toast.show { transform: translateX(0); }
.achievement-toast-icon { width: 48px; height: 48px; border-radius: 50%; background: var(--gold); color: var(--ink-deep); display: flex; align-items: center; justify-content: center; font-size: 1.5rem; font-family: "STKaiti",serif; font-weight: bold; flex-shrink: 0; }
.achievement-toast-text { flex: 1; }
.achievement-toast-title { font-size: 0.8rem; color: var(--gold); margin-bottom: 0.2rem; }
.achievement-toast-name { font-size: 1rem; font-weight: 600; }
.achievement-toast-desc { font-size: 0.8rem; opacity: 0.8; }

/* ========== 页脚 ========== */
.page-footer { text-align: center; padding: 2rem 1rem; background: var(--paper-dark); color: var(--ink-black); font-size: 0.9rem; }

/* ========== 音乐控制面板（增强）========== */
.music-panel {
  position: fixed; bottom: 20px; right: 20px; z-index: 9998;
  display: flex; align-items: center; gap: 0;
  background: rgba(44,44,44,0.85); backdrop-filter: blur(10px);
  border-radius: 30px; padding: 0.5rem;
  box-shadow: 0 4px 20px rgba(0,0,0,0.2); transition: var(--transition);
}
.music-panel:hover { background: rgba(44,44,44,0.95); }
.music-toggle {
  width: 40px; height: 40px; border-radius: 50%; border: none;
  background: var(--cinnabar); color: var(--paper-light); cursor: pointer;
  font-size: 1.2rem; display: flex; align-items: center; justify-content: center;
  transition: var(--transition); flex-shrink: 0;
}
.music-toggle:hover { background: var(--cinnabar-light); transform: scale(1.1); }
.music-toggle.playing { background: var(--jade); animation: pulse 2s infinite; }
.music-icon { display: block; line-height: 1; }

.music-extras {
  width: 0; overflow: hidden; display: flex; align-items: center; gap: 0.4rem;
  transition: width 0.3s ease, margin 0.3s ease; margin-left: 0;
}
.music-panel:hover .music-extras,
.music-panel.expanded .music-extras {
  width: 220px; margin-left: 0.5rem;
}

.music-volume { -webkit-appearance: none; appearance: none; width: 80px; height: 4px; border-radius: 2px; background: rgba(255,255,255,0.3); outline: none; cursor: pointer; }
.music-volume::-webkit-slider-thumb { -webkit-appearance: none; width: 16px; height: 16px; border-radius: 50%; background: #fff; cursor: pointer; box-shadow: 0 2px 6px rgba(0,0,0,0.3); }

.music-style-select {
  background: rgba(255,255,255,0.15); color: #fff; border: 1px solid rgba(255,255,255,0.3);
  border-radius: 15px; padding: 0.25rem 0.5rem; font-size: 0.75rem; outline: none; cursor: pointer;
}
.music-style-select option { background: var(--ink-deep); color: #fff; }

/* ========== 滚动引导 ========== */
.scroll-hint { text-align: center; padding: 2rem 0 1rem; animation: fadeIn 1.5s ease 1.5s both; cursor: pointer; }
.scroll-hint-text { display: block; font-size: 0.9rem; color: var(--cinnabar); margin-bottom: 0.5rem; letter-spacing: 0.1em; }
.scroll-hint-arrow { display: inline-block; font-size: 1.8rem; color: var(--cinnabar); animation: bounceDown 1.5s ease infinite; }

/* ========== 自定义学习内容 ========== */
.custom-section { margin-top: 3rem; background: var(--paper-light); border-radius: var(--radius); box-shadow: 0 4px 15px var(--shadow); overflow: hidden; }
.custom-toggle-btn { width: 100%; background: var(--ink-deep); color: var(--paper-light); border: none; padding: 1rem 1.5rem; font-size: 1.1rem; cursor: pointer; text-align: center; transition: var(--transition); font-family: "STKaiti","KaiTi",serif; letter-spacing: 0.1em; }
.custom-toggle-btn:hover { background: var(--cinnabar); }
.custom-panel { padding: 1.5rem; animation: fadeIn 0.4s ease; }
.custom-tabs { display: flex; gap: 0.5rem; margin-bottom: 1.5rem; border-bottom: 2px solid var(--paper-dark); padding-bottom: 0.5rem; }
.custom-tab { background: none; border: none; padding: 0.5rem 1.2rem; font-size: 0.95rem; cursor: pointer; color: #888; border-radius: 20px; transition: var(--transition); font-family: inherit; }
.custom-tab.active { background: var(--cinnabar); color: var(--paper-light); }
.custom-tab-content { display: none; }
.custom-tab-content.active { display: block; }
.custom-textarea { width: 100%; min-height: 150px; background: var(--paper); border: 2px solid var(--paper-dark); border-radius: var(--radius-sm); padding: 1rem; font-size: 0.95rem; color: var(--ink-black); line-height: 1.8; resize: vertical; font-family: "PingFang SC","Microsoft YaHei",sans-serif; outline: none; transition: var(--transition); }
.custom-textarea:focus { border-color: var(--cinnabar); box-shadow: 0 0 0 3px rgba(192,57,43,0.1); }

.gallery-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 1rem; margin-bottom: 1rem; }
.gallery-item { position: relative; border-radius: var(--radius-sm); overflow: hidden; aspect-ratio: 1; background: var(--paper-dark); cursor: pointer; transition: var(--transition); }
.gallery-item:hover { transform: scale(1.05); }
.gallery-item img { width: 100%; height: 100%; object-fit: cover; }
.gallery-item .delete-img { position: absolute; top: 5px; right: 5px; width: 24px; height: 24px; background: rgba(231,76,60,0.85); color: #fff; border: none; border-radius: 50%; cursor: pointer; font-size: 0.8rem; display: flex; align-items: center; justify-content: center; opacity: 0; transition: opacity 0.2s; }
.gallery-item:hover .delete-img { opacity: 1; }
.upload-btn { display: inline-block; background: var(--paper); border: 2px dashed var(--paper-dark); border-radius: var(--radius-sm); padding: 1rem 2rem; text-align: center; cursor: pointer; color: #888; font-size: 0.95rem; transition: var(--transition); width: 100%; }
.upload-btn:hover { border-color: var(--cinnabar); color: var(--cinnabar); background: rgba(192,57,43,0.03); }

.custom-test-list { margin-bottom: 1rem; }
.custom-test-item { background: var(--paper); border: 1px solid var(--paper-dark); border-radius: var(--radius-sm); padding: 1rem; margin-bottom: 0.8rem; position: relative; }
.custom-test-item .test-question { font-weight: 600; color: var(--ink-deep); margin-bottom: 0.5rem; }
.custom-test-item .test-options { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0.3rem; font-size: 0.85rem; color: #555; }
.custom-test-item .test-answer { font-size: 0.8rem; color: var(--jade); margin-top: 0.3rem; }
.custom-test-item .delete-test { position: absolute; top: 8px; right: 8px; width: 22px; height: 22px; background: rgba(231,76,60,0.1); color: #e74c3c; border: none; border-radius: 50%; cursor: pointer; font-size: 0.7rem; }
.add-test-btn { background: var(--paper); color: var(--cinnabar); border: 2px dashed var(--cinnabar); width: 100%; margin-top: 0.5rem; margin-bottom: 0.5rem; }
.add-test-btn:hover { background: rgba(192,57,43,0.05); }

/* 弹窗 */
.modal-overlay { position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: rgba(0,0,0,0.5); z-index: 9999; display: flex; align-items: center; justify-content: center; }
.modal-content { background: var(--paper-light); border-radius: var(--radius); padding: 2rem; max-width: 600px; width: 90%; max-height: 80vh; overflow-y: auto; box-shadow: 0 8px 30px rgba(0,0,0,0.2); }
.modal-field { margin-bottom: 1rem; }
.modal-field label { display: block; font-size: 0.9rem; color: var(--ink-black); margin-bottom: 0.3rem; font-weight: 600; }
.modal-field input, .modal-field select { width: 100%; padding: 0.6rem; border: 2px solid var(--paper-dark); border-radius: var(--radius-sm); font-size: 0.95rem; background: var(--paper); outline: none; }
.modal-field input:focus { border-color: var(--cinnabar); }
.modal-btns { display: flex; gap: 1rem; margin-top: 1.5rem; justify-content: flex-end; }

.test-option { background: var(--paper); border: 1px solid var(--paper-dark); border-radius: var(--radius-sm); padding: 0.8rem 1rem; cursor: pointer; transition: var(--transition); margin-bottom: 0.5rem; font-size: 0.95rem; }
.test-option:hover { border-color: var(--celadon); background: rgba(93,138,106,0.05); }
.test-option.correct { background: rgba(46,204,113,0.15); border-color: #2ecc71; }
.test-option.wrong { background: rgba(231,76,60,0.15); border-color: #e74c3c; }

/* ========== 游戏退出按钮 ========== */
.game-exit-row { text-align: right; margin-bottom: 0.5rem; }
.game-exit-btn {
  background: rgba(231,76,60,0.15); color: #e74c3c; border: 1px solid rgba(231,76,60,0.3);
  padding: 0.4rem 1rem; border-radius: 20px; cursor: pointer; font-size: 0.85rem;
  transition: var(--transition);
}
.game-exit-btn:hover { background: rgba(231,76,60,0.3); transform: scale(1.05); }
.game-exit-btn.farm-exit { color: #2c5f2d; border-color: rgba(44,95,45,0.3); background: rgba(44,95,45,0.1); }
.game-exit-btn.farm-exit:hover { background: rgba(44,95,45,0.25); }
.game-exit-btn.falling-exit { color: #e74c3c; border-color: rgba(231,76,60,0.3); background: rgba(231,76,60,0.15); }
.game-exit-btn.falling-exit:hover { background: rgba(231,76,60,0.3); }

/* ===== 连连看（记忆翻牌）===== */
.match-scene {
  background: linear-gradient(135deg, #f0e6d3, #e8dcc8, #f5ead5);
  border-radius: var(--radius); padding: 1.5rem; color: var(--ink-deep);
  max-width: 650px; margin: 0 auto; box-shadow: 0 8px 30px rgba(0,0,0,0.12);
}
.match-scene-inner { 
  background: rgba(255,255,255,0.5); border-radius: var(--radius-sm);
  padding: 1.5rem;
}
.match-header { text-align: center; margin-bottom: 1rem; }
.match-title { font-size: 1.5rem; font-family: "STKaiti",serif; color: #6b3a2e; margin-bottom: 0.2rem; }
.match-mode { font-size: 0.85rem; color: #8b6914; }
.match-stats {
  display: flex; justify-content: center; gap: 1.5rem; margin-bottom: 1.2rem;
  flex-wrap: wrap; background: rgba(255,255,255,0.6); border-radius: 20px; padding: 0.6rem 1.2rem;
}
.match-stat { text-align: center; }
.match-stat-label { display: block; font-size: 0.75rem; color: #8b6914; margin-bottom: 0.2rem; }
.match-stat-value { font-size: 1.1rem; font-weight: 700; color: #6b3a2e; }

.match-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 0.7rem;
  max-width: 440px; margin: 0 auto 1rem;
}

.match-card {
  aspect-ratio: 1; perspective: 600px; cursor: pointer;
  position: relative;
}
.match-card:hover .match-card-inner { transform: scale(1.05); }
.match-card.matched { pointer-events: none; }

.match-card-inner {
  width: 100%; height: 100%; position: relative; transition: transform 0.5s ease;
  transform-style: preserve-3d;
}
.match-card.flipped .match-card-inner { transform: rotateY(180deg); }

.match-card-front, .match-card-back {
  position: absolute; width: 100%; height: 100%; backface-visibility: hidden;
  border-radius: var(--radius-sm); display: flex; align-items: center;
  justify-content: center; font-weight: 600;
  box-shadow: 0 3px 10px rgba(0,0,0,0.1); border: 2px solid transparent;
}
.match-card-front {
  background: linear-gradient(135deg, #c0392b, #e74c3c);
  color: #fff; font-size: 2rem; font-family: "STKaiti",serif;
}
.match-card-back {
  transform: rotateY(180deg); font-size: 1.2rem; flex-direction: column; gap: 0.2rem;
}
.match-card-back.char-face { background: #fff8ee; border-color: #d4a574; color: #6b3a2e; }
.match-card-back.match-face { background: #f0f7ee; border-color: #5d8a6a; color: #2c5f2d; }
.match-card.matched .match-card-back { border-color: #2ecc71; background: rgba(46,204,113,0.12); }

.card-emoji { font-size: 1.8rem; }
.card-char { font-size: 2rem; font-family: "STKaiti","KaiTi",serif; }
.card-text { font-size: 1rem; font-weight: 600; }

.match-actions { display: flex; justify-content: center; gap: 1rem; margin-top: 1rem; flex-wrap: wrap; }

/* 连连看设置面板 */
.match-setup {
  background: rgba(255,255,255,0.7); border-radius: var(--radius-sm);
  padding: 1.5rem; margin-top: 1rem;
}
.setup-row {
  margin-bottom: 1.2rem; display: flex; flex-direction: column; gap: 0.4rem;
}
.setup-label {
  font-size: 0.95rem; font-weight: 600; color: #6b3a2e;
}
.setup-select, .setup-input {
  padding: 0.6rem 0.8rem; border: 2px solid #d4a574; border-radius: 8px;
  font-size: 0.95rem; background: #fff; color: var(--ink-deep); font-family: inherit;
  outline: none; transition: var(--transition);
}
.setup-select:focus, .setup-input:focus { border-color: var(--cinnabar); }
.setup-input { max-width: 120px; }
.setup-textarea {
  width: 100%; min-height: 120px; padding: 0.8rem;
  border: 2px solid #d4a574; border-radius: 8px;
  font-size: 0.9rem; background: #fff; color: var(--ink-deep);
  font-family: "PingFang SC","Microsoft YaHei",sans-serif; resize: vertical;
  outline: none; transition: var(--transition);
}
.setup-textarea:focus { border-color: var(--cinnabar); }
.setup-hint { font-size: 0.78rem; color: #999; }

.match-result { text-align: center; padding: 2rem 1rem; }
.match-result-icon { font-size: 4rem; margin-bottom: 1rem; }
.match-result-title { font-size: 1.5rem; font-family: "STKaiti",serif; color: #6b3a2e; margin-bottom: 0.8rem; }
.match-result-stats { color: #5a4a3a; margin-bottom: 1.5rem; font-size: 1rem; line-height: 2; }
.match-result-btns { display: flex; justify-content: center; gap: 1rem; flex-wrap: wrap; }

.match-msg { background: rgba(255,255,255,0.7); border-radius: 8px; margin: 0.5rem 0; }

/* ===== 时空穿越（汉字坠落）===== */
.falling-scene {
  background: linear-gradient(to bottom, #0a0a2e, #1a1a4e, #2a2a5e);
  border-radius: var(--radius); padding: 1.5rem; color: #e8e0ff;
  max-width: 650px; margin: 0 auto; box-shadow: 0 8px 30px rgba(0,0,0,0.3);
  min-height: 550px;
}
.falling-scene-inner { position: relative; height: 100%; }

.falling-header { text-align: center; margin-bottom: 1rem; }
.falling-title { font-size: 1.5rem; font-family: "STKaiti",serif; color: #ffd700; margin-bottom: 0.2rem; }
.falling-subtitle { font-size: 0.85rem; color: #a0a0d0; }

.falling-stats {
  display: flex; justify-content: center; gap: 2rem; margin-bottom: 1rem;
  background: rgba(255,255,255,0.08); border-radius: 20px; padding: 0.5rem 1.5rem;
}
.falling-stat { font-size: 1rem; color: #d0d0ff; font-weight: 600; }

.falling-game-field {
  position: relative; height: 380px; background: rgba(255,255,255,0.03);
  border-radius: var(--radius-sm); overflow: hidden;
  border: 1px solid rgba(255,215,0,0.15); margin-bottom: 0.5rem;
}

.falling-clue {
  padding: 1rem; text-align: center;
  background: rgba(255,215,0,0.08); border-bottom: 1px solid rgba(255,215,0,0.15);
}
.falling-clue-text { font-size: 1.15rem; font-weight: 600; color: #ffd700; }
.falling-clue-hint { font-size: 0.85rem; color: #b0b0e0; margin-top: 0.3rem; }

.falling-lane { position: relative; height: 300px; }

.falling-char {
  position: absolute; top: -60px;
  animation: charFall linear forwards;
  cursor: pointer; z-index: 2;
}
.falling-char-text {
  display: flex; align-items: center; justify-content: center;
  width: 58px; height: 58px; background: linear-gradient(135deg, rgba(255,215,0,0.2), rgba(255,165,0,0.15));
  border: 2px solid rgba(255,215,0,0.4); border-radius: 12px;
  font-size: 2rem; font-family: "STKaiti","KaiTi",serif; color: #ffd700;
  transition: all 0.3s ease; box-shadow: 0 0 20px rgba(255,215,0,0.2);
}
.falling-char:hover .falling-char-text {
  background: rgba(255,215,0,0.4); border-color: #ffd700;
  transform: scale(1.1); box-shadow: 0 0 30px rgba(255,215,0,0.5);
}
.falling-char.correct .falling-char-text {
  background: rgba(46,204,113,0.4); border-color: #2ecc71; color: #fff;
}
.falling-char.wrong .falling-char-text {
  background: rgba(231,76,60,0.4); border-color: #e74c3c; color: #fff;
}

@keyframes charFall {
  0% { top: -60px; opacity: 1; }
  10% { top: 20px; opacity: 1; }
  85% { top: 260px; opacity: 1; }
  100% { top: 320px; opacity: 0.5; }
}

.falling-feedback { text-align: center; min-height: 2rem; padding: 0.5rem; }

/* ========== 工具类 ========== */
.hidden { display: none !important; }
.text-center { text-align: center; }

/* ========== 响应式 ========== */

/* 平板 (768px - 1024px) */
@media (max-width: 1024px) {
  .home-content { max-width: 800px; }
  .nav-grid { grid-template-columns: repeat(3, 1fr); }
  .page-content { max-width: 850px; }
  .char-grid { grid-template-columns: repeat(4, 1fr); }
  .culture-grid { grid-template-columns: repeat(2, 1fr); }
  .game-select { grid-template-columns: repeat(2, 1fr); }
  .match-grid { max-width: 380px; }
  .top-nav-links { gap: 0.5rem; }
  .top-nav-links a { font-size: 0.8rem; padding: 0.25rem 0.5rem; }
}

/* 手机 (< 768px) */
@media (max-width: 768px) {
  html { font-size: 15px; }
  
  /* ===== 核心移动端修复 ===== */
  /* 禁用 backdrop-filter —— 手机端性能杀手 */
  .top-nav,
  .home-student-info,
  .nav-card,
  .music-panel,
  .section-back-btn {
    -webkit-backdrop-filter: none; backdrop-filter: none;
  }
  .top-nav { background: rgba(250, 246, 240, 0.98); }
  .home-student-info { background: rgba(255,255,255,0.92); }
  .nav-card { background: rgba(255,255,255,0.9); }
  .music-panel { background: rgba(44,44,44,0.95); }
  .section-back-btn { background: rgba(250, 246, 240, 0.98); }
  
  /* 改善触摸体验 */
  * { -webkit-tap-highlight-color: rgba(192,57,43,0.15); }
  button, .nav-card, .game-select-card, .char-card, .culture-card,
  .quiz-option, .battle-option, .match-card, .farm-plot, .quiz-cat-card {
    -webkit-tap-highlight-color: rgba(192,57,43,0.2);
    touch-action: manipulation;
  }
  /* 防止iOS输入框自动缩放 */
  .student-input, .custom-textarea, .setup-textarea, .setup-input {
    font-size: 16px !important;
  }
  
  /* 平滑惯性滚动 */
  .main-scroll { -webkit-overflow-scrolling: touch; }
  
  /* ===== 首页 ===== */
  .home-section { padding: 3rem 0.8rem 1.5rem; min-height: auto; }
  .home-title { font-size: 2.2rem; }
  .home-subtitle { font-size: 1rem; letter-spacing: 0.2em; }
  .home-divider { width: 150px; }

  /* 作者印章缩小 */
  .author-seal { padding: 0.6rem 1.2rem; transform: rotate(-2deg) scale(0.9); }
  .author-seal-label { font-size: 0.75rem; }
  .author-seal-value { font-size: 1rem; }

  /* 签到区 */
  .home-student-info { padding: 1rem 0.8rem; min-width: 0; width: calc(100% - 1rem); max-width: 360px; margin: 1rem auto; }
  .student-row { flex-wrap: nowrap; }
  .student-label { min-width: 40px; font-size: 0.9rem; }
  .student-input { min-width: 0; font-size: 16px; padding: 0.5rem 0.6rem; flex: 1; }
  .student-confirm-btn { padding: 0.6rem 1.2rem; font-size: 0.95rem; width: auto; }

  .home-intro { font-size: 0.9rem; margin: 1rem auto 1.5rem; }

  /* 导航卡片 2列 */
  .nav-grid { grid-template-columns: repeat(2, 1fr); gap: 0.8rem; padding: 0; }
  .nav-card { padding: 1.3rem 0.5rem; }
  .nav-card-icon { font-size: 1.8rem; }
  .nav-card-title { font-size: 0.95rem; }
  .nav-card-desc { font-size: 0.7rem; }

  /* 顶部导航 */
  .top-nav { padding: 0.5rem 0.8rem; }
  .top-nav-brand { font-size: 1rem; }
  .top-nav-links { gap: 0.2rem; }
  .top-nav-links a { font-size: 0.7rem; padding: 0.2rem 0.4rem; }

  /* 页面内容 */
  .page-header { padding: 2rem 1rem 1rem; }
  .page-content { padding: 1.5rem 0.8rem; max-width: 100%; }
  .section-back-btn { padding: 0.6rem 1rem; font-size: 0.85rem; min-height: 44px; }

  /* 字源 */
  .char-grid { grid-template-columns: repeat(3, 1fr); gap: 0.6rem; }
  .char-card { padding: 1rem 0.3rem; min-height: 80px; }
  .char-card-char { font-size: 2rem; }
  .evolution-display { padding: 1.5rem 1rem; }
  .evolution-timeline { -webkit-overflow-scrolling: touch; }
  .evolution-stage { min-width: 120px; }
  .stage-svg-container { width: 90px; height: 90px; }
  .evolution-header { flex-direction: column; align-items: flex-start; }

  /* 声调 */
  .tone-cards { grid-template-columns: 1fr; gap: 1rem; }
  .tone-game-options { grid-template-columns: 1fr; }
  .tone-game-char { font-size: 3.5rem; }
  .tone-practice { padding: 1.5rem 1rem; }

  /* 文化 */
  .culture-grid { grid-template-columns: 1fr; gap: 1rem; }
  .culture-card-banner { height: 80px; font-size: 2.5rem; }
  .culture-detail { padding: 1.5rem 1rem; }
  .related-chars { justify-content: center; }

  /* 闯关 */
  .quiz-start { padding: 2rem 1rem; }
  .quiz-start h3 { font-size: 1.4rem; }
  .quiz-options { grid-template-columns: 1fr; }
  .quiz-categories { grid-template-columns: repeat(2, 1fr); gap: 0.6rem; }
  .quiz-question { font-size: 1.1rem; }
  .quiz-option { padding: 0.8rem 1rem; min-height: 44px; }
  .quiz-result-stats { gap: 1rem; }
  .quiz-stat-num { font-size: 1.5rem; }

  /* 游戏 */
  .game-select { grid-template-columns: 1fr; gap: 1rem; }
  .game-select-card { padding: 1.5rem 1rem; min-height: 44px; }

  /* 打怪 */
  .battle-scene { padding: 1.5rem 1rem; max-width: 100%; }
  .battle-arena { flex-direction: column; gap: 0.8rem; }
  .battle-vs { transform: rotate(90deg); font-size: 1.5rem; }
  .battle-fighter-icon { font-size: 2.8rem; }
  .battle-options { grid-template-columns: 1fr; }
  .battle-option { min-height: 44px; padding: 0.7rem 0.8rem; }
  .battle-question-area { padding: 1rem; }
  .battle-title { font-size: 1.2rem; }

  /* 农场 */
  .farm-scene { padding: 1.5rem 1rem; min-height: 400px; max-width: 100%; }
  .farm-field { grid-template-columns: repeat(2, 1fr); max-width: 300px; gap: 0.8rem; margin: 0 auto 1.5rem; }
  .farm-plot { font-size: 1.5rem; min-height: 70px; }
  .farm-crop-icon-big { font-size: 2.5rem; }
  .farm-crop-name { font-size: 1.5rem; }

  /* 连连看 */
  .match-scene { padding: 1rem; max-width: 100%; }
  .match-scene-inner { padding: 1rem; }
  .match-grid { gap: 0.5rem; max-width: 320px; }
  .match-card-front { font-size: 1.5rem; }
  .card-char { font-size: 1.5rem; }
  .card-emoji { font-size: 1.3rem; }
  .card-text { font-size: 0.85rem; }
  .match-stats { gap: 0.8rem; padding: 0.5rem 0.8rem; }
  .match-stat-value { font-size: 1rem; }
  .match-setup { padding: 1rem; }
  .setup-textarea { min-height: 100px; font-size: 16px; }
  .setup-select, .setup-input, .quiz-btn { min-height: 44px; }

  /* 时空穿越 */
  .falling-scene { padding: 1rem; max-width: 100%; min-height: 450px; }
  .falling-game-field { height: 320px; }
  .falling-char-text { width: 48px; height: 48px; font-size: 1.6rem; }
  .falling-lane { height: 260px; }
  .falling-stats { gap: 1rem; padding: 0.4rem 1rem; }
  .falling-stat { font-size: 0.9rem; }
  .falling-clue-text { font-size: 1rem; }

  /* 文档上传 */
  .doc-upload-area { padding: 1.5rem 1rem; }
  .upload-method { padding: 1rem; }

  /* 音乐面板 - 触屏优化 */
  .music-panel { bottom: 15px; right: 15px; padding: 0.4rem; }
  .music-toggle { width: 44px; height: 44px; font-size: 1.2rem; }
  .music-panel.expanded .music-extras,
  .music-panel:hover .music-extras { width: 180px; }
  .music-volume { width: 60px; }
  .music-style-select { font-size: 0.7rem; padding: 0.2rem 0.4rem; min-height: 32px; }

  /* 弹窗 */
  .modal-content { width: 92%; padding: 1.5rem; }
  .achievement-toast { right: 10px; left: 10px; max-width: none; }

  /* 自定义内容 */
  .custom-section { margin-top: 2rem; }
  .custom-panel { padding: 1rem; }
  .custom-textarea { min-height: 120px; font-size: 16px; }
  .gallery-grid { grid-template-columns: repeat(2, 1fr); }
  .custom-test-item .test-options { grid-template-columns: 1fr; }
  .custom-tabs { overflow-x: auto; -webkit-overflow-scrolling: touch; flex-wrap: nowrap; }
  .custom-tab { white-space: nowrap; padding: 0.5rem 1rem; min-height: 40px; }

  /* 页脚 */
  .page-footer { padding: 1.5rem 1rem; }
  .page-footer p { font-size: 0.8rem; }
}

/* 小手机 (< 480px) */
@media (max-width: 480px) {
  html { font-size: 14px; }
  .home-section { padding: 2.5rem 0.6rem 1.5rem; }
  .home-seal { width: 60px; height: 60px; line-height: 60px; font-size: 2rem; margin-bottom: 1rem; }
  .home-title { font-size: 1.8rem; }
  .home-subtitle { font-size: 0.9rem; }

  /* 作者印章进一步缩小 */
  .author-seal { padding: 0.5rem 1rem; gap: 0.2rem; }
  .author-seal-label { font-size: 0.7rem; }
  .author-seal-value { font-size: 0.9rem; }
  .author-seal-row { gap: 0.5rem; }

  /* 签到区 */
  .home-student-info { width: calc(100% - 0.6rem); padding: 0.8rem 0.6rem; }
  .student-label { min-width: 36px; font-size: 0.85rem; }
  .student-input { padding: 0.45rem 0.5rem; font-size: 16px; }
  .student-confirm-btn { padding: 0.5rem 1.2rem; font-size: 0.85rem; }
  .student-switch-btn { font-size: 0.75rem; }

  .nav-grid { grid-template-columns: 1fr 1fr; gap: 0.5rem; }
  .nav-card { padding: 1rem 0.3rem; }
  .nav-card-icon { font-size: 1.5rem; }
  .nav-card-title { font-size: 0.85rem; }
  .nav-card-desc { font-size: 0.65rem; }

  .char-grid { grid-template-columns: repeat(2, 1fr); }
  .evolution-stage { min-width: 90px; }
  .evolution-header { flex-direction: column; align-items: flex-start; }
  .evolution-title .big-char { font-size: 2.2rem; }

  .quiz-categories { grid-template-columns: repeat(2, 1fr); }
  .quiz-cat-card { padding: 1rem 0.5rem; }
  .quiz-cat-icon { font-size: 2rem; }
  .quiz-cat-name { font-size: 0.9rem; }

  /* 顶部导航隐藏部分链接 */
  .top-nav-links a:nth-child(n+5) { display: none; }

  /* 打怪 */
  .battle-arena { padding: 0.5rem 0; }
  .battle-fighter-icon { font-size: 2.2rem; }
  .battle-fighter-name { font-size: 0.8rem; }
  .battle-hp-bar { max-width: 140px; }

  /* 农场 */
  .farm-field { grid-template-columns: repeat(2, 1fr); max-width: 240px; }
  .farm-plot { font-size: 1.2rem; min-height: 60px; }

  /* 连连看 */
  .match-grid { max-width: 250px; gap: 0.35rem; }
  .match-card-front { font-size: 1.1rem; }
  .card-char { font-size: 1.1rem; }
  .card-text { font-size: 0.7rem; }
  .match-stats { gap: 0.4rem; padding: 0.4rem 0.6rem; }
  .match-stat-label { font-size: 0.6rem; }
  .match-stat-value { font-size: 0.8rem; }
  .match-title { font-size: 1.2rem; }

  /* 时空穿越 */
  .falling-game-field { height: 260px; }
  .falling-char-text { width: 40px; height: 40px; font-size: 1.3rem; }
  .falling-lane { height: 200px; }
  .falling-clue-text { font-size: 0.95rem; }

  /* 音乐面板 */
  .music-panel { bottom: 10px; right: 10px; padding: 0.3rem; }
  .music-toggle { width: 40px; height: 40px; }
  .music-panel.expanded .music-extras,
  .music-panel:hover .music-extras { width: 140px; }
  .music-volume { width: 45px; }

  /* 页脚 */
  .page-footer p { font-size: 0.75rem; }
  .page-footer p:last-child { font-size: 0.65rem; }
}