/* ============================================
   WordQuest - 游戏化雅思单词学习
   ============================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --bg-primary: #0d0d1a; --bg-secondary: #141428;
    --bg-card: #1a1a30; --bg-input: #0f0f20;
    --text-primary: #e0d8c8; --text-secondary: #a09888; --text-dim: #605848;
    --accent-gold: #e6c456; --accent-gold-dim: #8a7430;
    --accent-red: #c0392b; --accent-green: #27ae60; --accent-blue: #5b7fbf;
    --border-color: #2a2a40; --border-glow: #3a3a55;
    --font-serif: 'Noto Serif SC', 'SimSun', serif;
    --font-mono: 'JetBrains Mono', 'Consolas', monospace;
}

html, body {
    margin: 0; padding: 0;
    width: 100vw; height: 100vh;
    font-family: var(--font-serif);
    background: var(--bg-primary);
    color: var(--text-primary);
    overflow: hidden;
}
body { display: flex; justify-content: center; align-items: center; user-select: none; -webkit-user-select: none; }
input, textarea, [contenteditable] { user-select: text; -webkit-user-select: text; }

/* ============================================
   全局壁画背景
   ============================================ */
.mural-bg {
    position: fixed; inset: 0; z-index: 0; pointer-events: none;
    background:
        radial-gradient(ellipse at 30% 20%, rgba(230,196,86,0.04) 0%, transparent 50%),
        radial-gradient(ellipse at 70% 50%, rgba(91,127,191,0.03) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 80%, rgba(192,57,43,0.03) 0%, transparent 50%),
        var(--bg-primary);
    animation: muralPanDown 60s linear infinite;
}
@keyframes muralPanDown { 0% { transform: translateY(-5%); } 100% { transform: translateY(10%); } }
body.in-game .mural-bg { display: none; }

.bg-banner {
    position: absolute; left: 0; right: 0; top: 0; height: 6px;
    background: linear-gradient(90deg, transparent, var(--accent-gold-dim), transparent); opacity: 0.15;
}
.bg-banner.bottom { top: auto; bottom: 0; }
.bg-speedlines {
    position: absolute; inset: 0;
    background: repeating-linear-gradient(85deg, transparent, transparent 30px, rgba(255,255,255,0.008) 30px, rgba(255,255,255,0.008) 31px);
}
.bg-mural {
    position: absolute; opacity: 0.06; font-size: 62px; filter: grayscale(0.4);
    animation: muralBreathe 9s ease-in-out infinite;
}
@keyframes muralBreathe { 0%,100% { transform: translateY(0) scale(1); opacity: 0.06; } 50% { transform: translateY(-5px) scale(1.03); opacity: 0.09; } }
.m01 { top: 3%; left: 6%; animation-delay: 0.0s; } .m02 { top: 3%; left: 29%; animation-delay: 0.5s; }
.m03 { top: 3%; left: 52%; animation-delay: 1.0s; } .m04 { top: 3%; left: 75%; animation-delay: 1.5s; }
.m05 { top: 21%; left: 6%; animation-delay: 2.0s; } .m06 { top: 21%; left: 29%; animation-delay: 2.5s; }
.m07 { top: 21%; left: 52%; animation-delay: 3.0s; } .m08 { top: 21%; left: 75%; animation-delay: 3.5s; }
.m09 { top: 39%; left: 6%; animation-delay: 4.0s; } .m10 { top: 39%; left: 29%; animation-delay: 4.5s; }
.m11 { top: 39%; left: 52%; animation-delay: 5.0s; } .m12 { top: 39%; left: 75%; animation-delay: 5.5s; }
.m13 { top: 57%; left: 6%; animation-delay: 6.0s; } .m14 { top: 57%; left: 29%; animation-delay: 6.5s; }
.m15 { top: 57%; left: 52%; animation-delay: 7.0s; } .m16 { top: 57%; left: 75%; animation-delay: 7.5s; }
.m17 { top: 75%; left: 6%; animation-delay: 8.0s; } .m18 { top: 75%; left: 29%; animation-delay: 8.5s; }
.m19 { top: 75%; left: 52%; animation-delay: 0.3s; font-size: 68px; }
.m20 { top: 75%; left: 75%; animation-delay: 1.3s; }

.bg-fx {
    position: absolute; opacity: 0; font-size: 18px; color: var(--accent-gold);
    animation: fxSparkle 5s ease-in-out infinite;
}
@keyframes fxSparkle { 0%,100% { opacity: 0.03; transform: scale(0.8) rotate(0deg); } 50% { opacity: 0.1; transform: scale(1.2) rotate(45deg); } }
.fx1{top:10%;left:22%;animation-delay:0s}.fx2{top:28%;left:46%;animation-delay:.6s}
.fx3{top:46%;left:15%;animation-delay:1.2s}.fx4{top:64%;left:68%;animation-delay:1.8s}
.fx5{top:82%;left:40%;animation-delay:2.4s}.fx6{top:14%;right:20%;animation-delay:3s}
.fx7{top:32%;right:8%;animation-delay:3.6s}.fx8{top:50%;right:40%;animation-delay:4.2s}
.fx9{top:68%;right:15%;animation-delay:.3s}.fx10{top:86%;right:30%;animation-delay:.9s}
.fx11{top:18%;left:60%;animation-delay:1.5s;font-size:22px}.fx12{top:36%;left:85%;animation-delay:2.1s;font-size:22px}
.fx13{top:54%;right:60%;animation-delay:2.7s}.fx14{top:72%;left:30%;animation-delay:3.3s}
.fx15{top:90%;left:65%;animation-delay:3.9s}.fx16{top:6%;right:55%;animation-delay:4.5s}

.bg-spotlight {
    position: absolute; border-radius: 50%; filter: blur(80px); opacity: 0.04;
    animation: spotSweep 14s ease-in-out infinite;
}
@keyframes spotSweep { 0%,100%{transform:translate(0,0);opacity:.04} 33%{transform:translate(60px,-30px);opacity:.06} 66%{transform:translate(-40px,20px);opacity:.03} }
.s1{width:500px;height:500px;background:radial-gradient(#e6c456,transparent);top:-5%;left:20%}
.s2{width:400px;height:400px;background:radial-gradient(#5b7fbf,transparent);top:35%;right:0;animation-delay:5s}
.s3{width:450px;height:450px;background:radial-gradient(#c0392b,transparent);bottom:-10%;left:40%;animation-delay:10s}

.bg-particles { display: none; }

/* ============================================
   按钮 & 基础组件
   ============================================ */
button { cursor: pointer; border: none; font-family: var(--font-serif); transition: all 0.2s ease; }
button:active { transform: scale(0.96); }
.btn-primary { background: linear-gradient(135deg, #8a7430, #c9a840); color: #1a1a10; padding: 12px 28px; border-radius: 6px; font-size: 16px; font-weight: 700; letter-spacing: 1px; box-shadow: 0 2px 12px rgba(230,196,86,0.2); }
.btn-primary:hover { box-shadow: 0 4px 20px rgba(230,196,86,0.4); transform: translateY(-1px); }
.btn-primary:disabled { opacity: 0.4; cursor: not-allowed; transform: none; }
.btn-secondary { background: transparent; color: var(--text-secondary); padding: 10px 20px; border-radius: 6px; border: 1px solid var(--border-color); font-size: 14px; }
.btn-secondary:hover { border-color: var(--accent-gold-dim); color: var(--accent-gold); }
.btn-text { background: transparent; color: var(--text-dim); padding: 8px 12px; font-size: 14px; border-radius: 4px; }
.btn-text:hover { color: var(--accent-red); }
.btn-large { padding: 16px 40px; font-size: 18px; }
.btn-round { width: 38px; height: 38px; border-radius: 50%; background: var(--bg-input); color: var(--text-secondary); border: 1px solid var(--border-color); font-size: 18px; display: flex; align-items: center; justify-content: center; }
.btn-round:hover { border-color: var(--accent-gold); color: var(--accent-gold); }
.input-text { width: 100%; padding: 12px 16px; background: var(--bg-input); color: var(--text-primary); border: 1px solid var(--border-color); border-radius: 6px; font-family: var(--font-mono); font-size: 15px; }
.input-text:focus { outline: none; border-color: var(--accent-gold); }

/* 全局返回主页按钮 */
.btn-home { position: fixed; bottom: 24px; right: 20px; z-index: 999; padding: 12px 24px; border-radius: 24px; background: rgba(22,22,42,0.9); color: var(--text-secondary); border: 1px solid var(--border-color); font-size: 16px; cursor: pointer; letter-spacing: 2px; }
.btn-home:hover { border-color: var(--accent-gold); color: var(--accent-gold); box-shadow: 0 0 12px rgba(230,196,86,0.2); }
.btn-difficulty { position: fixed; bottom: 120px; right: 20px; z-index: 999; padding: 12px 24px; border-radius: 24px; background: rgba(22,22,42,0.9); color: var(--text-secondary); border: 1px solid var(--border-color); font-size: 16px; cursor: pointer; letter-spacing: 2px; }
.btn-difficulty:hover { border-color: var(--accent-gold); color: var(--accent-gold); box-shadow: 0 0 10px rgba(230,196,86,0.15); }
.diff-overlay { position: fixed; inset: 0; z-index: 600; background: rgba(0,0,0,0.8); display: flex; align-items: center; justify-content: center; }
.diff-panel { background: var(--bg-card); border: 1px solid var(--border-glow); border-radius: 12px; padding: 28px 32px; max-width: 380px; width: 90%; text-align: center; }
.diff-panel h3 { color: var(--accent-gold); margin-bottom: 16px; font-size: 18px; }
.diff-option { padding: 14px 16px; margin-bottom: 8px; border-radius: 8px; background: var(--bg-secondary); border: 1px solid var(--border-color); cursor: pointer; transition: all 0.2s; text-align: left; }
.diff-option:hover { border-color: var(--accent-gold); background: #1e1e38; }
.diff-option.selected { border-color: var(--accent-gold); box-shadow: 0 0 10px rgba(230,196,86,0.15); }
.diff-name { font-size: 16px; font-weight: 700; color: var(--text-primary); margin-bottom: 4px; }
.diff-desc { font-size: 13px; color: var(--text-dim); }
.btn-wordbook { position: fixed; bottom: 72px; right: 20px; z-index: 999; padding: 12px 24px; border-radius: 24px; background: rgba(22,22,42,0.9); color: var(--text-secondary); border: 1px solid var(--border-color); font-size: 16px; cursor: pointer; letter-spacing: 2px; }
.btn-wordbook:hover { border-color: var(--accent-gold); color: var(--accent-gold); box-shadow: 0 0 10px rgba(230,196,86,0.15); }

/* ============================================
   容器 & 屏幕
   ============================================ */
.app-container { position: relative; z-index: 1; width: 100%; max-width: 960px; height: 100vh; padding: 20px; overflow: hidden; display: flex; flex-direction: column; justify-content: center; }
.screen { display: none; }
.screen.active { display: block; animation: fadeIn 0.4s ease; }
#screen-game.active { position: fixed; inset: 0; z-index: 10; background: var(--bg-primary); overflow-y: auto; }
#screen-victory.active { position: fixed; inset: 0; z-index: 10; background: var(--bg-primary); overflow-y: auto; display: flex; align-items: center; justify-content: center; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
@keyframes slideUp { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.5; } }
@keyframes glowPulse { 0%,100% { box-shadow: 0 0 5px var(--accent-gold-dim); } 50% { box-shadow: 0 0 20px var(--accent-gold); } }
@keyframes shake { 0%,100%{transform:translateX(0)} 25%{transform:translateX(-5px)} 75%{transform:translateX(5px)} }

/* ============================================
   主页
   ============================================ */
.home-hero { position: relative; z-index: 2; text-align: center; padding: 40px 0 16px; pointer-events: auto; }
.home-title { font-size: 110px; font-weight: 900; letter-spacing: 20px; line-height: 1.2; padding-bottom: 10px; background: linear-gradient(180deg, #fef5c0 0%, #f0d060 25%, #c9a020 55%, #7a5010 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; -webkit-text-stroke: 1.5px rgba(200,160,60,0.2); }
.home-divider { display: flex; align-items: center; justify-content: center; gap: 14px; margin: 10px 0; }
.hd-line { width: 80px; height: 1px; background: linear-gradient(90deg, transparent, var(--accent-gold-dim)); }
.hd-line:last-child { background: linear-gradient(90deg, var(--accent-gold-dim), transparent); }
.hd-diamond { color: var(--accent-gold); font-size: 10px; opacity: 0.6; }
.home-subtitle { color: var(--text-dim); font-size: 19px; letter-spacing: 6px; }

.home-questboard { position: relative; z-index: 2; max-width: 560px; width: 100%; margin: 0 auto; pointer-events: auto; background: linear-gradient(180deg, rgba(22,22,42,0.95), rgba(14,14,30,0.98)); border: 1px solid var(--border-glow); border-radius: 4px; box-shadow: 0 0 40px rgba(0,0,0,0.5), inset 0 1px 0 rgba(255,255,255,0.02); max-height: 65vh; overflow-y: auto; }
.questboard-inner { padding: 28px 32px 24px; position: relative; z-index: 1; }
.qboard-corner { position: absolute; width: 20px; height: 20px; z-index: 2; border-color: var(--accent-gold-dim); border-style: solid; opacity: 0.5; }
.qboard-corner.tl { top: -1px; left: -1px; border-width: 2px 0 0 2px; }
.qboard-corner.tr { top: -1px; right: -1px; border-width: 2px 2px 0 0; }
.qboard-corner.bl { bottom: -1px; left: -1px; border-width: 0 0 2px 2px; }
.qboard-corner.br { bottom: -1px; right: -1px; border-width: 0 2px 2px 0; }
.quest-intro { color: var(--text-secondary); font-size: 15px; line-height: 2.0; text-align: center; margin-bottom: 28px; }
.quest-intro em { color: var(--accent-gold); font-style: normal; }
.quest-goal { display: flex; align-items: center; justify-content: space-between; padding: 16px 20px; margin-bottom: 28px; background: rgba(0,0,0,0.3); border: 1px solid rgba(255,255,255,0.04); border-radius: 3px; }
.quest-label { color: var(--text-dim); font-size: 20px; letter-spacing: 3px; }
.quest-stepper { display: flex; align-items: center; gap: 14px; }
.stepper-btn { width: 36px; height: 36px; border-radius: 3px; background: transparent; color: var(--text-dim); border: 1px solid var(--border-color); font-size: 16px; cursor: pointer; display: flex; align-items: center; justify-content: center; }
.stepper-btn:hover { border-color: var(--accent-gold); color: var(--accent-gold); }
.stepper-num { font-family: var(--font-mono); font-size: 36px; font-weight: 700; color: var(--accent-gold); line-height: 36px; }
.quest-btn-main { display: flex; align-items: center; justify-content: center; gap: 16px; width: 100%; padding: 18px 0; margin-bottom: 12px; background: linear-gradient(180deg, rgba(180,140,50,0.2), rgba(120,90,30,0.15)); border: 1px solid var(--accent-gold-dim); border-radius: 3px; color: var(--accent-gold); font-size: 18px; font-weight: 700; letter-spacing: 4px; cursor: pointer; text-shadow: 0 0 6px rgba(230,196,86,0.2); box-shadow: 0 0 10px rgba(230,196,86,0.05), 0 0 24px rgba(230,196,86,0.03); }
.quest-btn-main:hover { background: linear-gradient(180deg, rgba(200,155,55,0.35), rgba(140,100,35,0.25)); border-color: var(--accent-gold); box-shadow: 0 0 18px rgba(230,196,86,0.18), 0 0 36px rgba(230,196,86,0.05); text-shadow: 0 0 10px rgba(230,196,86,0.35); }
.quest-btn-main:active { transform: translateY(0); }
.qbm-icon { font-size: 20px; opacity: 0.7; }
.quest-btn-sub { display: block; width: 100%; padding: 12px 0; background: transparent; color: var(--text-dim); border: 1px solid transparent; border-radius: 3px; font-size: 13px; letter-spacing: 2px; cursor: pointer; }
.quest-btn-sub:hover { color: var(--accent-gold); border-color: rgba(255,255,255,0.06); }

/* 进度条 */
.home-progress { margin-bottom: 20px; }
.hp-bar-bg { height: 6px; background: var(--bg-secondary); border-radius: 3px; overflow: hidden; margin-bottom: 6px; }
.hp-bar-fill { height: 100%; background: linear-gradient(90deg, #8a7430, #e6c456); border-radius: 3px; transition: width 0.6s ease; width: 0%; }
.hp-text { font-size: 12px; color: var(--text-dim); text-align: center; letter-spacing: 1px; }
.hp-text strong { color: var(--accent-gold); }

/* 单词本 */
.wordbook-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.8); z-index: 500; display: flex; align-items: center; justify-content: center; }
.wordbook-panel { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 12px; padding: 32px; max-width: 480px; width: 90%; max-height: 70vh; overflow-y: auto; }
.wordbook-panel h3 { color: var(--accent-gold); margin-bottom: 16px; text-align: center; }
.wordbook-section { margin-bottom: 10px; border-radius: 8px; cursor: pointer; border: 1px solid var(--border-color); }
.wordbook-section:hover { border-color: var(--accent-gold-dim); }
.wb-section-header { display: flex; justify-content: space-between; align-items: center; padding: 14px 18px; font-size: 15px; color: var(--text-primary); }
.wb-count { font-family: var(--font-mono); font-size: 16px; font-weight: 700; color: var(--accent-gold); }
.wordbook-tags { display: flex; flex-direction: column; gap: 4px; padding: 0 18px 14px; border-top: 1px solid var(--border-color); padding-top: 12px; }
.wb-tag { display: flex; align-items: center; justify-content: space-between; padding: 10px 16px; border-radius: 6px; font-size: 15px; font-family: var(--font-mono); background: var(--bg-secondary); border: 1px solid var(--border-color); color: var(--text-secondary); cursor: pointer; transition: all 0.15s; }
.wb-tag:hover { border-color: var(--accent-gold); color: var(--text-primary); }
.wb-tag.mastered { border-left: 3px solid var(--accent-green); }
.wb-tag.error { border-left: 3px solid var(--accent-red); }
.wb-tag .wb-remove { font-size: 12px; color: var(--text-dim); padding: 2px 8px; }
.wb-tag .wb-remove:hover { color: var(--accent-red); }
.wb-date-group { margin-bottom: 14px; }
.wb-date { font-size: 12px; color: var(--accent-gold); margin-bottom: 6px; letter-spacing: 1px; padding-left: 4px; }
.wb-date-words { display: flex; flex-direction: column; gap: 4px; }
.word-detail-overlay { position: fixed; inset: 0; z-index: 600; background: rgba(0,0,0,0.85); display: flex; align-items: center; justify-content: center; }
.word-detail-card { background: var(--bg-card); border: 1px solid var(--accent-gold-dim); border-radius: 16px; padding: 40px; text-align: center; max-width: 480px; width: 90%; }
.word-detail-card .wd-word { font-size: 48px; font-weight: 700; font-family: var(--font-mono); color: var(--text-primary); letter-spacing: 3px; }
.word-detail-card .wd-meaning { font-size: 24px; color: var(--accent-gold); margin: 12px 0; }
.word-detail-card .wd-pron { font-size: 16px; color: var(--text-dim); font-family: var(--font-mono); margin-bottom: 0; }
.word-detail-card .wd-speakers { display: flex; justify-content: center; gap: 12px; margin: 10px 0 16px; }
.word-detail-card .wd-speakers .speaker-btn { width: auto; height: auto; padding: 5px 16px; border-radius: 16px; font-size: 13px; letter-spacing: 1px; display: inline-flex; align-items: center; gap: 4px; }
.word-detail-card .wd-speakers .speaker-btn:hover { border-color: var(--accent-gold); color: var(--accent-gold); }
.word-detail-card .wd-example { font-size: 16px; color: #d0c8b8; font-style: italic; margin-bottom: 6px; }
.word-detail-card .wd-example-cn { font-size: 15px; color: #b0a898; margin-bottom: 20px; }
.wd-actions { display: flex; gap: 12px; justify-content: center; }

/* 单词本底部描述 */
.wb-desc { display: none; font-size: 13px; line-height: 1.7; padding: 10px 16px; margin-top: 6px; border-radius: 6px; letter-spacing: 1px; }
.wb-desc-mastered { color: #5a8a5a; background: rgba(39,174,96,0.06); border: 1px solid rgba(39,174,96,0.15); }
.wb-desc-errors { color: #b55a5a; background: rgba(192,57,43,0.06); border: 1px solid rgba(192,57,43,0.15); }

/* ============================================
   单词学习
   ============================================ */
.learn-header { display: flex; align-items: center; justify-content: center; position: relative; margin-bottom: 24px; padding-bottom: 12px; border-bottom: 1px solid var(--border-color); }
.learn-progress { font-family: var(--font-mono); color: var(--accent-gold); font-size: 14px; position: absolute; left: 0; }
.learn-title { font-size: 16px; font-weight: 700; text-align: center; }
.flashcard-container { perspective: 1000px; margin-bottom: 36px; }
.flashcard { width: 100%; max-width: 720px; height: 440px; margin: 0 auto; position: relative; transform-style: preserve-3d; transition: transform 0.5s ease; cursor: pointer; }
.flashcard.flipped { transform: rotateY(180deg); }
.flashcard-front, .flashcard-back { position: absolute; width: 100%; height: 100%; backface-visibility: hidden; border-radius: 16px; display: flex; flex-direction: column; align-items: center; justify-content: center; border: 1px solid var(--border-color); background: var(--bg-card); }
.flashcard-back { transform: rotateY(180deg); }
.word-display { font-size: 64px; font-weight: 700; font-family: var(--font-mono); color: var(--text-primary); letter-spacing: 4px; }
.pronunciations-row { display: flex; gap: 40px; margin-top: 18px; justify-content: center; }
.pron-col { display: flex; align-items: center; gap: 8px; padding: 6px 14px; border-radius: 8px; background: var(--bg-secondary); border: 1px solid transparent; }
.pron-label { font-size: 14px; font-weight: 700; color: var(--accent-gold); letter-spacing: 1px; min-width: 28px; text-align: center; }
.pron-text { font-family: var(--font-mono); font-size: 16px; color: #b0a898; min-width: 120px; text-align: center; }
.speaker-btn { display: flex; align-items: center; justify-content: center; width: 34px; height: 34px; border-radius: 50%; background: transparent; color: var(--text-dim); border: 1px solid var(--border-color); font-size: 15px; cursor: pointer; transition: all 0.2s ease; flex-shrink: 0; }
.speaker-btn:hover { border-color: var(--accent-gold); color: var(--accent-gold); box-shadow: 0 0 8px rgba(230,196,86,0.2); }
.speaker-btn.speaking { border-color: var(--accent-gold); color: var(--accent-gold); background: rgba(230,196,86,0.1); animation: glowPulse 0.6s infinite; }
.speaker-icon { font-size: 15px; line-height: 1; }
.meaning-display { font-size: 42px; font-weight: 700; color: var(--accent-gold); }
.example-display { font-size: 20px; color: #d0c8b8; margin-top: 18px; font-style: italic; }
.example-cn-display { font-size: 18px; color: #b0a898; margin-top: 10px; }
.tap-hint { position: absolute; bottom: 16px; font-size: 17px; color: #d4b860; text-shadow: 0 0 10px rgba(230,196,86,0.4), 0 0 20px rgba(230,196,86,0.2); animation: hintGlow 2s ease-in-out infinite; }
@keyframes hintGlow { 0%,100%{opacity:0.6;text-shadow:0 0 8px rgba(230,196,86,0.25)} 50%{opacity:1;text-shadow:0 0 16px rgba(230,196,86,0.55),0 0 30px rgba(230,196,86,0.2)} }
.learn-controls { display: flex; justify-content: center; align-items: center; gap: 20px; margin-bottom: 20px; }
#btnFinishLearn { width: auto !important; padding: 10px 22px !important; font-size: 17px; letter-spacing: 2px; display: none; flex-shrink: 0; }
.learn-dots { display: flex; justify-content: center; gap: 6px; flex-wrap: wrap; margin-bottom: 20px; }
.learn-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--border-color); }
.learn-dot.active { background: var(--accent-gold); width: 10px; height: 10px; }
.learn-dot.viewed { background: var(--accent-gold-dim); }
#btnFinishLearn { display: none; margin: 0 auto; }

/* ============================================
   题材选择
   ============================================ */
.genre-desc { color: var(--text-secondary); font-size: 13px; margin-bottom: 16px; text-align: center; }

/* 分类标签 */
.genre-tabs { display: flex; gap: 0; margin-bottom: 16px; border-bottom: 1px solid var(--border-color); }
.genre-tab {
    flex: 1; padding: 10px 0; text-align: center; cursor: pointer;
    background: transparent; color: var(--text-dim); border: none;
    font-size: 15px; font-weight: 700; letter-spacing: 2px;
    border-bottom: 2px solid transparent; transition: all 0.2s;
}
.genre-tab:hover { color: var(--text-secondary); }
.genre-tab.active { color: var(--accent-gold); border-bottom-color: var(--accent-gold); }

/* 题材面板 */
.genre-panel { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-bottom: 16px; }
.genre-panel.active { display: grid; }
.genre-btn {
    padding: 14px 8px; border-radius: 6px; text-align: center; cursor: pointer;
    background: var(--bg-secondary); color: var(--text-primary);
    border: 1px solid var(--border-color); font-size: 14px; transition: all 0.2s;
}
.genre-btn:hover { border-color: var(--accent-gold); background: #1e1e38; }
.genre-btn.selected { border-color: var(--accent-gold); background: #2a2a20; box-shadow: 0 0 8px rgba(230,196,86,0.15); }
.genre-actions { display: flex; justify-content: center; gap: 16px; margin-top: 8px; }
.loading-overlay { padding: 40px 0; }
.loading-spinner { width: 48px; height: 48px; margin: 0 auto 20px; border: 3px solid var(--border-color); border-top-color: var(--accent-gold); border-radius: 50%; animation: spin 1s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.loading-text { font-size: 16px; color: var(--accent-gold); margin-bottom: 4px; }
.loading-sub { font-size: 13px; color: var(--text-dim); }

/* ============================================
   文字冒险游戏
   ============================================ */
.game-container { background: var(--bg-card); border: none; border-radius: 0; overflow: hidden; display: flex; flex-direction: column; width: 100%; height: 100vh; }
.game-header { display: flex; justify-content: space-between; align-items: center; padding: 14px 20px; background: var(--bg-secondary); border-bottom: 1px solid var(--border-color); }
.game-title { font-size: 15px; font-weight: 700; color: var(--accent-gold); }
.game-chapter { font-family: var(--font-mono); font-size: 13px; color: var(--text-dim); }
.game-story-area { flex: 1; overflow-y: auto; padding: 32px 28px; min-height: 40vh; line-height: 2.1; font-size: 17px; }
.story-entry { margin-bottom: 20px; animation: slideUp 0.4s ease; }
.story-entry.intro { font-style: italic; color: var(--text-secondary); border-left: 2px solid var(--accent-gold-dim); padding-left: 16px; }
.story-text { font-size: 18px; color: var(--text-primary); line-height: 2.1; }
.word-mark {
    color: #fff8c0; font-weight: 700;
    background: rgba(230,180,60,0.2);
    padding: 2px 6px; border-radius: 4px;
    border-bottom: 3px solid var(--accent-gold);
    text-shadow: 0 0 6px rgba(230,196,86,0.3);
}
.story-success { font-size: 14px; color: var(--accent-green); margin-top: 8px; padding-left: 12px; border-left: 2px solid var(--accent-green); }
.story-failure { font-size: 14px; color: var(--accent-red); margin-top: 8px; padding-left: 12px; border-left: 2px solid var(--accent-red); }
.game-input-area { padding: 16px 20px; background: var(--bg-secondary); border-top: 1px solid var(--border-color); }
.challenge-box { text-align: center; }
.challenge-prompt { font-size: 15px; color: var(--text-secondary); margin-bottom: 12px; }
.challenge-input-row { display: flex; align-items: center; gap: 10px; justify-content: center; }
.input-cursor { color: var(--accent-gold); font-size: 20px; animation: pulse 1.5s infinite; }
.game-input { flex: 1; max-width: 360px; padding: 14px 20px; background: var(--bg-input); color: var(--text-primary); border: 1px solid var(--border-color); border-radius: 6px; font-family: var(--font-mono); font-size: 20px; letter-spacing: 3px; }
.game-input:focus { outline: none; border-color: var(--accent-gold); box-shadow: 0 0 10px rgba(230,196,86,0.15); }
.game-input.wrong { animation: shake 0.4s ease; border-color: var(--accent-red); }
.game-input.correct { border-color: var(--accent-green); }
.wrong-hint { color: var(--accent-gold); font-size: 14px; margin-top: 10px; min-height: 22px; line-height: 1.5; }
.wrong-counter { color: var(--accent-red); font-size: 13px; margin-top: 4px; min-height: 20px; }
.checkpoint-toast { position: fixed; top: 20px; right: 20px; background: rgba(26,26,10,0.9); color: var(--accent-gold); padding: 8px 18px; border-radius: 20px; font-weight: 700; font-size: 13px; z-index: 100; border: 1px solid var(--accent-gold-dim); box-shadow: 0 4px 16px rgba(230,196,86,0.15); }
.game-save-hint { position: fixed; bottom: 16px; left: 20px; color: #ffffff; font-size: 15px; letter-spacing: 1px; opacity: 0.85; z-index: 5; }
.gameover-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.8); display: flex; align-items: center; justify-content: center; z-index: 50; }
.gameover-card { background: var(--bg-card); border: 1px solid var(--accent-red); border-radius: 16px; padding: 40px; text-align: center; max-width: 440px; animation: slideUp 0.4s ease; }
.gameover-title { font-size: 28px; color: var(--accent-red); margin-bottom: 12px; }
.gameover-text { color: var(--text-secondary); margin-bottom: 16px; line-height: 1.7; }
.gameover-word { margin-bottom: 24px; }
.gameover-word .correct { font-family: var(--font-mono); font-size: 24px; color: var(--accent-gold); }
.gameover-actions { display: flex; flex-direction: column; gap: 12px; align-items: center; }

/* ============================================
   意见箱
   ============================================ */
.feedback-box {
    position: fixed; right: 24px; top: 160px; z-index: 20;
    width: 220px; padding: 16px;
    background: rgba(22,22,42,0.9); border: 1px solid var(--border-color);
    border-radius: 10px; font-size: 13px;
}
.feedback-title { color: var(--text-dim); margin-bottom: 8px; font-size: 13px; }
.feedback-textarea {
    width: 100%; padding: 8px 10px; resize: vertical;
    background: var(--bg-input); color: var(--text-primary);
    border: 1px solid var(--border-color); border-radius: 6px;
    font-family: var(--font-serif); font-size: 13px; line-height: 1.6;
}
.feedback-textarea:focus { outline: none; border-color: var(--accent-gold); }
.feedback-btn { width: 100%; margin-top: 8px; font-size: 13px; padding: 8px 0; }
.feedback-done { text-align: center; color: var(--accent-green); font-size: 13px; margin-top: 8px; }

@media (max-width: 768px) {
    .feedback-box { right: 8px; top: 120px; width: 180px; padding: 12px; }
}

/* ============================================
   通关
   ============================================ */
.victory-container { text-align: center; padding: 40px 20px; background: var(--bg-card); border: none; border-radius: 0; width: 100%; max-width: 720px; }
.victory-title { font-size: 52px; color: var(--accent-gold); margin-bottom: 8px; animation: glowPulse 2s infinite; }
.victory-subtitle { font-size: 18px; color: var(--text-secondary); margin-bottom: 30px; }
.victory-stats { display: flex; justify-content: center; gap: 40px; margin-bottom: 30px; padding: 20px; background: var(--bg-secondary); border-radius: 10px; }
.stat-item { text-align: center; }
.stat-number { font-family: var(--font-mono); font-size: 32px; font-weight: 700; color: var(--accent-gold); }
.stat-label { font-size: 13px; color: var(--text-dim); margin-top: 4px; }
.victory-story-summary { margin-bottom: 24px; padding: 20px; background: var(--bg-secondary); border-radius: 10px; text-align: left; line-height: 1.8; }
.victory-story-summary h3 { color: var(--accent-gold); margin-bottom: 10px; font-size: 16px; }
.victory-words { margin-bottom: 28px; }
.victory-words h3 { color: var(--accent-gold); margin-bottom: 10px; font-size: 14px; }
.word-badges { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; }
.word-badge { padding: 6px 14px; border-radius: 20px; font-size: 13px; background: var(--bg-secondary); border: 1px solid var(--border-color); font-family: var(--font-mono); }
.word-badge.perfect { border-color: var(--accent-green); color: var(--accent-green); }
.word-badge.retried { border-color: var(--accent-gold-dim); color: var(--accent-gold); }
.victory-actions { display: flex; gap: 16px; justify-content: center; }

/* ============================================
   邀请码弹窗（小弹窗）
   ============================================ */
.invite-popup { position: fixed; inset: 0; z-index: 9999; display: flex; align-items: center; justify-content: center; }
.invite-popup-bg { position: absolute; inset: 0; background: rgba(5,5,15,0.85); backdrop-filter: blur(4px); }
.invite-popup-card {
    position: relative; z-index: 1; text-align: center;
    max-width: 420px; width: 90%; padding: 40px 32px;
    background: var(--bg-card); border: 1px solid var(--border-glow);
    border-radius: 16px; box-shadow: 0 0 60px rgba(0,0,0,0.5);
    animation: slideUp 0.3s ease;
}
.invite-popup-card h3 { color: var(--accent-gold); font-size: 20px; margin-bottom: 8px; }
.invite-popup-desc { color: var(--text-dim); font-size: 14px; margin-bottom: 24px; }
.invite-popup-card .invite-input { flex: 1; padding: 14px 18px; background: var(--bg-input); color: var(--text-primary); border: 1px solid var(--border-color); border-radius: 6px; font-family: var(--font-mono); font-size: 18px; letter-spacing: 4px; text-transform: uppercase; }
.invite-popup-card .invite-input:focus { outline: none; border-color: var(--accent-gold); }
.invite-popup-card .invite-input.wrong { animation: shake 0.4s ease; border-color: var(--accent-red); }
.invite-popup-card .invite-input-row { display: flex; gap: 10px; }
.invite-popup-card .invite-btn { padding: 14px 24px; font-size: 16px; white-space: nowrap; }
.invite-popup-card .invite-error { color: var(--accent-red); font-size: 14px; margin-top: 14px; min-height: 20px; }


/* ============================================
   响应式
   ============================================ */
@media (max-width: 600px) {
    .app-container { padding: 8px; }
    .home-title { font-size: 56px; letter-spacing: 8px; }
    .home-hero { padding: 30px 0 10px; }
    .questboard-inner { padding: 18px 14px; }
    .quest-goal { flex-direction: column; gap: 12px; }
    .genre-grid { grid-template-columns: repeat(2, 1fr); }
    .genre-btn { padding: 12px 6px; font-size: 13px; }
    .flashcard { height: 280px; }
    .word-display { font-size: 38px; }
    .victory-stats { flex-direction: column; gap: 16px; }
}.btn-home-return {
    background: transparent; color: #ffffff; border: 2px solid rgba(255,255,255,0.6);
    padding: 14px 40px; border-radius: 6px; font-size: 17px; font-weight: 700;
    letter-spacing: 3px; cursor: pointer; font-family: var(--font-serif);
    transition: all 0.2s ease;
}
.btn-home-return:hover { background: rgba(255,255,255,0.08); border-color: #ffffff; }