:root{font-family:Segoe UI,PingFang SC,Microsoft YaHei,sans-serif;line-height:1.5;color:#1e293b;background:linear-gradient(160deg,#fef3c7,#fde68a 35%,#bfdbfe)}*{box-sizing:border-box}body{margin:0;min-height:100vh}button,input{font:inherit}.app-root{min-height:100vh;max-width:720px;margin:0 auto;padding:16px 16px 32px}.screen{animation:fadeIn .25s ease}@keyframes fadeIn{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}.hero{text-align:center;margin-bottom:20px}.hero-badge{display:inline-block;margin:0 0 8px;padding:4px 12px;background:#fff;border-radius:999px;font-size:.85rem;color:#b45309;font-weight:600}.hero h1{margin:0;font-size:2.2rem;color:#c2410c}.hero-desc{margin:8px 0 0;color:#475569}.name-field{display:grid;gap:8px;background:#fff;padding:16px;border-radius:16px;margin-bottom:12px;box-shadow:0 8px 24px #0f172a14}.name-field input{border:2px solid #fcd34d;border-radius:12px;padding:12px 14px;font-size:1.1rem}.welcome-line{text-align:center;font-size:1.25rem;font-weight:700;color:#0f172a;margin:0 0 8px}.stars-line{text-align:center;font-size:1.05rem;font-weight:600;color:#b45309;margin:0 0 8px}.checkin-home-line{text-align:center;font-size:.95rem;color:#475569;margin:0 0 20px}.menu-grid{display:grid;gap:14px}.menu-card{display:grid;grid-template-columns:auto 1fr;grid-template-rows:auto auto;gap:4px 14px;align-items:center;text-align:left;padding:18px 20px;border:none;border-radius:20px;cursor:pointer;box-shadow:0 10px 28px #0f172a1f;transition:transform .15s ease}.menu-card:active{transform:scale(.98)}.menu-icon{font-size:2.2rem;grid-row:span 2}.menu-card strong{font-size:1.2rem}.menu-card small{color:#64748b;grid-column:2}.menu-learn{background:#fff}.menu-listen{background:#ecfdf5}.menu-tone{background:#eff6ff}.menu-stories{background:#fdf4ff}.menu-games{background:#fef9c3}.menu-checkin{background:#e0f2fe}.checkin-summary{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px;background:#fff;padding:14px 16px;border-radius:16px;margin-bottom:12px;box-shadow:0 6px 20px #0f172a14;font-weight:600;color:#0f766e}.checkin-today-badge{color:#15803d;font-size:.9rem}.checkin-btn{border:none;background:#14b8a6;color:#fff;padding:10px 16px;border-radius:999px;font-weight:700;cursor:pointer}.checkin-toast{text-align:center;color:#15803d;font-weight:600;margin:0 0 12px}.checkin-month-bar{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}.checkin-month-bar strong{font-size:1.1rem;color:#0f172a}.checkin-nav{width:44px;height:44px;border:none;border-radius:12px;background:#fff;font-size:1.5rem;cursor:pointer;box-shadow:0 4px 12px #0f172a1a}.checkin-weekdays{display:grid;grid-template-columns:repeat(7,1fr);gap:4px;margin-bottom:6px;text-align:center;font-size:.7rem;font-weight:700;color:#64748b;text-transform:uppercase}.checkin-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:6px}.checkin-cell{aspect-ratio:1;border-radius:12px;background:#fff;display:flex;flex-direction:column;align-items:center;justify-content:center;position:relative;font-weight:600;color:#334155;box-shadow:0 2px 8px #0f172a0f}.checkin-cell.empty{background:transparent;box-shadow:none}.checkin-cell.checked{background:#d1fae5;color:#065f46}.checkin-cell.today{outline:2px solid #0ea5e9;outline-offset:1px}.checkin-day-num{font-size:.95rem}.checkin-dot{font-size:.65rem;line-height:1;margin-top:2px}.checkin-legend{margin:16px 0 0;font-size:.85rem;color:#64748b;display:flex;align-items:center;gap:8px;justify-content:center}.checkin-legend-sample{width:20px;height:20px;border-radius:6px;background:#fff;display:inline-block}.checkin-legend-sample.checked{background:#d1fae5}.feedback.bad{color:#dc2626;text-align:center}.sound-toggle{display:block;width:100%;margin-bottom:14px;padding:10px;border:2px dashed #c4b5fd;border-radius:12px;background:#faf5ff;cursor:pointer;font-weight:600;color:#6d28d9}.toast{position:fixed;bottom:24px;left:50%;transform:translate(-50%);background:#15803d;color:#fff;padding:12px 20px;border-radius:999px;font-weight:600;z-index:50;box-shadow:0 8px 24px #0003}.story-list{list-style:none;margin:0;padding:0;display:grid;gap:12px}.story-list-btn{width:100%;text-align:left;display:grid;gap:4px;padding:16px;border:none;border-radius:16px;background:#fff;box-shadow:0 8px 20px #0f172a14;cursor:pointer}.story-list-btn span{color:#c2410c;font-weight:600}.story-list-btn small{color:#64748b}.story-header{background:#fff;border-radius:16px;padding:16px;margin-bottom:16px;box-shadow:0 8px 20px #0f172a14;display:grid;gap:8px}.story-title-zh{margin:0;font-size:1.4rem;color:#c2410c}.story-summary{margin:0;color:#64748b}.story-lines{list-style:none;margin:0;padding:0;display:grid;gap:10px}.story-line-btn{width:100%;text-align:left;display:grid;gap:6px;padding:14px 16px;border:2px solid #fde68a;border-radius:14px;background:#fff;cursor:pointer}.story-hanzi{font-size:1.15rem;line-height:1.6;color:#0f172a}.story-pinyin{font-size:.95rem;color:#4f46e5;letter-spacing:.02em}.story-play-hint{font-size:.75rem;color:#94a3b8}.sub-header{display:flex;align-items:center;gap:12px;margin-bottom:16px}.sub-header h2{margin:0;font-size:1.35rem}.back{border:none;background:#fff;padding:8px 12px;border-radius:10px;cursor:pointer;box-shadow:0 2px 8px #00000014}.tabs{display:flex;gap:8px;margin-bottom:12px}.tabs button{flex:1;padding:10px;border:2px solid #e2e8f0;border-radius:12px;background:#fff;cursor:pointer;font-weight:600}.tabs button.active{border-color:#f59e0b;background:#fffbeb;color:#b45309}.tip{font-size:.9rem;color:#64748b;margin:0 0 12px}.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(100px,1fr));gap:10px}.pinyin-card{display:flex;flex-direction:column;align-items:center;gap:4px;padding:14px 8px;border:2px solid #fde68a;border-radius:16px;background:#fff;cursor:pointer;min-height:100px}.pinyin-card-main{font-size:1.6rem;font-weight:700;color:#c2410c}.pinyin-card-han{font-size:1.1rem;color:#334155;font-weight:600}.chart-figure{margin:0 0 12px;border-radius:12px;overflow:hidden;background:#fff;box-shadow:0 4px 16px #0f172a14}.chart-figure img{display:block;width:100%;height:auto}.section-tabs{display:flex;gap:6px;overflow-x:auto;padding-bottom:4px;margin-bottom:8px}.section-tabs button{flex-shrink:0;padding:8px 10px;font-size:.8rem;border:2px solid #e2e8f0;border-radius:10px;background:#fff;cursor:pointer}.section-tabs button.active{border-color:#f59e0b;background:#fffbeb;color:#b45309;font-weight:600}.section-title{margin:0 0 8px;font-size:1rem;color:#c2410c}.section-title-zh{font-size:.85em;color:#64748b;font-weight:500}.pinyin-card-hint{font-size:.65rem;color:#94a3b8}.quiz-panel{background:#fff;border-radius:20px;padding:24px 20px;box-shadow:0 12px 32px #0f172a1a;display:grid;gap:16px;text-align:center}.quiz-prompt{margin:0;font-size:1.05rem}.big-char{font-size:2.5rem;color:#c2410c}.big-speak{padding:14px 20px;font-size:1.1rem;border:none;border-radius:14px;background:linear-gradient(135deg,#fbbf24,#f59e0b);color:#fff;font-weight:600;cursor:pointer}.options-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.option-btn{padding:16px;font-size:1.25rem;font-weight:600;border:2px solid #e2e8f0;border-radius:14px;background:#f8fafc;cursor:pointer}.option-btn:hover{border-color:#f59e0b;background:#fffbeb}.tone-grid{display:grid;gap:10px}.tone-btn{padding:14px;font-size:1rem;font-weight:600;border:2px solid #bfdbfe;border-radius:12px;background:#eff6ff;cursor:pointer}.feedback{margin:0;font-weight:600;color:#15803d}button.ghost{border:none;background:transparent;color:#64748b;cursor:pointer;text-decoration:underline}code{background:#f1f5f9;padding:2px 8px;border-radius:6px}@media (max-width: 480px){.hero h1{font-size:1.75rem}.card-grid{grid-template-columns:repeat(3,1fr)}}.game-v2{min-height:100%}.game-v2-header{display:flex;align-items:flex-start;gap:10px;margin-bottom:8px}.game-v2-header h2{margin:0;font-size:1.25rem}.game-v2-sub{margin:4px 0 0;font-size:.85rem;color:#64748b}.game-v2-hud{display:flex;justify-content:space-between;gap:8px;flex-wrap:wrap;padding:10px 14px;margin-bottom:12px;background:#fff;border-radius:14px;font-weight:700;color:#6d28d9;box-shadow:0 4px 16px #6d28d91f}.game-v2-body{display:flex;flex-direction:column;gap:14px}.sound-row{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-bottom:14px}.sound-row .sound-toggle{margin:0;font-size:.8rem}.game-pick-grid{display:grid;gap:12px}.game-pick-card{text-align:left;display:grid;grid-template-columns:auto 1fr;grid-template-rows:auto auto;gap:4px 14px;padding:18px;border:none;border-radius:18px;cursor:pointer;box-shadow:0 10px 28px #0f172a1a;transition:transform .15s ease}.game-pick-card:active{transform:scale(.98)}.game-pick-card.bubble{background:linear-gradient(135deg,#e0f2fe,#bae6fd)}.game-pick-card.snap{background:linear-gradient(135deg,#fce7f3,#fbcfe8)}.game-pick-card.climb{background:linear-gradient(135deg,#dcfce7,#bbf7d0)}.game-pick-icon{font-size:2rem;grid-row:span 2}.game-pick-card small{color:#475569}.primary-btn{width:100%;padding:14px;border:none;border-radius:14px;background:#7c3aed;color:#fff;font-weight:700;font-size:1rem;cursor:pointer}.game-end-card{background:#fff;border-radius:20px;padding:28px 20px;text-align:center;box-shadow:0 12px 32px #0f172a1a;display:grid;gap:16px}.hear-btn{border:none;background:#f1f5f9;padding:10px 16px;border-radius:999px;font-weight:600;cursor:pointer;color:#4f46e5}.bubble-stage{background:linear-gradient(180deg,#dbeafe,#eff6ff 60%,#fef9c3);border-radius:20px;padding:16px;min-height:420px;position:relative;transition:background .2s ease}.bubble-stage.ok{box-shadow:inset 0 0 0 3px #22c55e}.bubble-stage.bad{animation:shake .35s ease}.bubble-target{text-align:center;margin-bottom:20px}.bubble-target-label{display:block;font-size:.9rem;color:#475569;margin-bottom:8px}.bubble-field{position:relative;height:280px}.bubble{position:absolute;width:88px;height:88px;border:none;border-radius:50%;background:radial-gradient(circle at 30% 30%,#fff,#93c5fd);box-shadow:0 8px 20px #3b82f659;font-weight:700;font-size:1rem;color:#1e3a8a;cursor:pointer;animation:float 3s ease-in-out infinite}.bubble-0{left:8%;top:10%;animation-delay:0s}.bubble-1{right:5%;top:18%;animation-delay:.4s}.bubble-2{left:20%;bottom:8%;animation-delay:.8s}.bubble-3{right:18%;bottom:15%;animation-delay:1.2s}.bubble.pop{animation:pop .4s ease forwards}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-12px)}}@keyframes pop{to{transform:scale(1.4);opacity:0}}.snap-card{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:8px;background:#fff;border-radius:20px;padding:24px 16px;box-shadow:0 12px 36px #0f172a1f;transition:transform .35s ease,opacity .35s ease}.snap-card.in{animation:snapIn .35s ease}.snap-card.out-left{transform:translate(-120%) rotate(-8deg);opacity:0}.snap-card.out-right{transform:translate(120%) rotate(8deg);opacity:0}@keyframes snapIn{0%{transform:scale(.9);opacity:0}}.snap-side{text-align:center;display:grid;gap:8px}.snap-side span{font-size:2.5rem;font-weight:700}.snap-pinyin{color:#4f46e5!important;font-size:1.8rem!important}.snap-side small{color:#94a3b8;text-transform:uppercase;font-size:.7rem;letter-spacing:.06em}.snap-divider{width:2px;height:64px;background:#e2e8f0}.snap-hear{margin:0 auto;display:block}.snap-feedback{text-align:center;font-weight:700;color:#15803d;margin:0}.snap-actions{display:grid;grid-template-columns:1fr 1fr;gap:12px}.snap-btn{padding:18px;border:none;border-radius:16px;font-size:1.1rem;font-weight:700;cursor:pointer}.snap-btn.no{background:#fee2e2;color:#b91c1c}.snap-btn.yes{background:#dcfce7;color:#15803d}.climb-visual{background:#fff;border-radius:20px;padding:16px;box-shadow:0 8px 24px #0f172a14}.climb-mountain{position:relative;height:200px;background:linear-gradient(180deg,#bae6fd,#86efac);border-radius:16px;overflow:hidden}.climb-step{position:absolute;left:50%;transform:translate(-50%);width:40%;height:8px;background:#fff6;border-radius:4px}.climb-step.on{background:#fef08a}.climb-step:nth-child(1){bottom:12%}.climb-step:nth-child(2){bottom:21%}.climb-step:nth-child(3){bottom:30%}.climb-step:nth-child(4){bottom:39%}.climb-step:nth-child(5){bottom:48%}.climb-step:nth-child(6){bottom:57%}.climb-step:nth-child(7){bottom:66%}.climb-step:nth-child(8){bottom:75%}.climb-avatar{position:absolute;left:50%;transform:translate(-50%);font-size:2rem;transition:bottom .4s ease}.climb-question{text-align:center;background:#fff;padding:16px;border-radius:16px}.tone-pick-grid{display:grid;gap:10px}.tone-pick{padding:16px;border:none;border-radius:14px;font-weight:700;font-size:1rem;cursor:pointer;color:#0f172a}.tone-1{background:#fecaca}.tone-2{background:#fed7aa}.tone-3{background:#bbf7d0}.tone-4{background:#bfdbfe}.streak-hot{color:#ea580c}.time-warn{color:#dc2626;animation:pulse .8s ease infinite}@keyframes pulse{50%{opacity:.55}}@keyframes shake{25%{transform:translate(-6px)}75%{transform:translate(6px)}}