:root{font-family:Avenir Next,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;line-height:1.5;font-weight:400;color:#1f2937;background:radial-gradient(circle at top,#fffffff2,#fff8ebcc 40%,#edf7fff2),#f6fbff;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;--surface: rgba(255, 255, 255, .88);--surface-strong: #ffffff;--border: rgba(148, 163, 184, .25);--shadow: 0 20px 40px rgba(15, 23, 42, .08);--text-soft: #4b5563;--accent: #2563eb}*{box-sizing:border-box}html,body,#root{margin:0;min-height:100%}body{min-width:320px}a{color:inherit;text-decoration:none}button{font:inherit}.app-shell{width:min(1120px,calc(100% - 32px));margin:0 auto;padding:24px 0 48px}.page-header{display:flex;flex-direction:column;gap:14px;margin-bottom:24px}.page-header__top{display:flex;align-items:center;justify-content:space-between;gap:12px}.page-header h1,.page-header h2,.play-panel h2,.game-card h2{margin:0}.page-header p,.play-panel p,.game-card p{margin:0;color:var(--text-soft)}.back-link,.secondary-link{width:fit-content;color:#0f766e;font-weight:700}.sound-toggle{border:1px solid var(--border);border-radius:999px;padding:8px 14px;background:#ffffffe6;color:#0f766e;font-weight:700;cursor:pointer}.game-card,.play-panel{background:var(--surface);border:1px solid var(--border);border-radius:28px;box-shadow:var(--shadow);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px)}.eyebrow{display:inline-flex;margin-bottom:10px;padding:6px 12px;border-radius:999px;background:#2563eb1a;color:#1d4ed8;font-size:.85rem;font-weight:700}.game-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px}.game-card{position:relative;padding:22px;overflow:hidden}.game-card:after{position:absolute;inset:auto -16px -16px auto;width:96px;height:96px;border-radius:24px;background:color-mix(in srgb,var(--game-color) 18%,white);content:"";transform:rotate(16deg)}.game-card__icon{width:52px;height:52px;display:grid;place-items:center;border-radius:18px;background:color-mix(in srgb,var(--game-color) 16%,white);color:var(--game-color);font-size:1.6rem;font-weight:800;margin-bottom:14px}.game-card__badge{display:inline-flex;margin-bottom:10px;padding:5px 10px;border-radius:999px;background:#ffffffeb;border:1px solid var(--border);font-size:.78rem;font-weight:700}.game-card__footer,.play-panel__top,.score-board,.page-actions{display:flex;justify-content:space-between;gap:12px}.game-card__footer{position:relative;z-index:1;align-items:center;margin-top:18px}.game-card__footer span{max-width:130px;font-size:.9rem;color:var(--text-soft)}.primary-button,.secondary-button,.answer-button,.match-tile{border:none;border-radius:18px;transition:transform .16s ease,box-shadow .16s ease,background-color .16s ease;cursor:pointer}.primary-button,.secondary-button{padding:12px 18px;font-weight:800}.primary-button{background:var(--game-color, var(--accent));color:#fff;box-shadow:0 12px 20px color-mix(in srgb,var(--game-color, var(--accent)) 30%,transparent)}.secondary-button{background:#ecfeff;color:#115e59}.play-panel{padding:24px;position:relative;overflow:hidden}.play-panel__top{align-items:start;margin-bottom:24px}.mini-score{display:grid;gap:8px;min-width:84px;padding:12px;border-radius:18px;background:color-mix(in srgb,var(--game-color) 12%,white);text-align:center;color:#334155;font-weight:700}.answer-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.answer-button,.match-tile{min-height:82px;padding:18px;background:var(--surface-strong);border:1px solid color-mix(in srgb,var(--game-color) 16%,var(--border));font-size:clamp(1.3rem,3vw,1.8rem);font-weight:800;color:#0f172a}.answer-button{position:relative;overflow:hidden}.answer-button.is-correct{background:#dcfce7;border-color:#22c55e;color:#166534}.answer-button.is-wrong{background:#fee2e2;border-color:#ef4444;color:#b91c1c}.answer-button.is-revealed-correct{background:#ecfdf5;border-color:#4ade80;color:#166534}.answer-button.is-hint-target{box-shadow:inset 0 0 0 2px color-mix(in srgb,var(--game-color) 42%,white)}.butterfly{position:absolute;top:8px;left:50%;transform:translate(-50%);font-size:1.35rem;pointer-events:none}.butterfly.is-flying{animation:butterfly-flight 2.4s cubic-bezier(.2,.8,.2,1) both}.hint-row{display:flex;justify-content:center;margin-top:16px}.hint-button{display:inline-flex;align-items:center;gap:8px;padding:10px 16px;border:1px solid color-mix(in srgb,var(--game-color) 20%,var(--border));border-radius:999px;background:color-mix(in srgb,var(--game-color) 12%,white);color:#0f172a;font-weight:800;cursor:pointer;box-shadow:0 10px 18px #0f172a0f}.hint-button:disabled{opacity:.55;cursor:not-allowed}.feedback-panel{min-height:64px;display:grid;place-items:center;margin:20px 0 16px;padding:12px 16px;border-radius:18px;background:#f8fafc;color:#475569;font-weight:700}.feedback-panel--correct{background:#dcfce7;color:#166534}.feedback-panel--wrong{background:#fee2e2;color:#b91c1c}.feedback-panel--answering{background:#fef3c7;color:#92400e}.score-board{margin:18px 0 24px}.score-board div{flex:1;display:grid;gap:6px;padding:18px;border-radius:22px;background:color-mix(in srgb,var(--game-color) 12%,white);text-align:center}.score-board strong{font-size:2rem}.play-panel--celebrating{isolation:isolate}.fireworks{position:fixed;top:0;right:0;bottom:0;left:0;width:100vw;height:100vh;pointer-events:none;z-index:999;mix-blend-mode:screen}.firework-burst{position:absolute;left:var(--burst-left);top:var(--burst-top);width:0;height:0;animation:firework-pop 3.4s ease-out var(--burst-delay) both;transform:scale(var(--burst-scale, 1))}.firework-particle{position:absolute;top:0;right:0;bottom:0;left:0;width:14px;height:14px;margin:-7px 0 0 -7px;border-radius:999px;background:radial-gradient(circle at 35% 35%,hsl(var(--particle-hue) 100% 68%),hsl(var(--particle-hue) 98% 54%) 45%,hsl(var(--particle-hue) 92% 36%));box-shadow:0 0 20px hsl(var(--particle-hue) 100% 58% / .95),0 0 40px hsl(var(--particle-hue) 100% 48% / .72);transform-origin:center;opacity:0;animation:firework-particle 3.4s ease-out var(--burst-delay) both;will-change:transform,opacity}@keyframes butterfly-flight{0%{transform:translate(-50%,42px) scale(.55) rotate(-18deg);opacity:0}10%{opacity:1}20%{transform:translate(calc(-50% - 12px),10px) scale(.7) rotate(18deg)}40%{transform:translate(calc(-50% + 14px),-18px) scale(.82) rotate(-10deg)}60%{transform:translate(calc(-50% - 10px),-2px) scale(.92) rotate(14deg)}80%{transform:translate(calc(-50% + 8px),-14px) scale(.98) rotate(-6deg)}to{transform:translate(-50%,-16px) scale(1) rotate(0);opacity:1}}@keyframes firework-pop{0%{opacity:0;transform:scale(.1)}10%{opacity:1}to{opacity:1;transform:scale(1)}}@keyframes firework-particle{0%{opacity:0;transform:rotate(var(--particle-angle)) translateY(0) scale(.15)}8%{opacity:1}35%{opacity:1}to{opacity:0;transform:rotate(var(--particle-angle)) translateY(-260px) scale(1)}}.matching-board{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.matching-column{display:grid;gap:12px}.match-tile.is-selected,.answer-button:hover,.primary-button:hover,.secondary-button:hover,.match-tile:hover,.sound-toggle:hover{transform:translateY(-2px);box-shadow:0 10px 18px #0f172a14}.answer-button:disabled,.match-tile:disabled,.secondary-button:disabled{cursor:not-allowed;transform:none;box-shadow:none}.answer-button:disabled{opacity:1}.match-tile:disabled,.secondary-button:disabled{opacity:.5}.dot-group{display:flex;flex-wrap:wrap;justify-content:center;gap:8px}.dot{width:14px;height:14px;border-radius:999px;background:var(--game-color, #f97316)}@media (max-width: 720px){.app-shell{width:min(100% - 20px,1120px);padding-top:16px}.page-header{gap:8px;margin-bottom:16px}.page-header h1{font-size:clamp(1.45rem,6vw,1.9rem);line-height:1.08}.page-header p{font-size:.92rem;line-height:1.35}.page-header__top{flex-direction:row;align-items:center;flex-wrap:wrap;gap:8px}.back-link,.sound-toggle{font-size:.88rem}.sound-toggle{padding:6px 12px}.answer-grid,.matching-board,.game-card__footer,.score-board{grid-template-columns:1fr;flex-direction:column}.play-panel__top{flex-direction:row;align-items:flex-start;gap:10px;margin-bottom:16px}.play-panel__top>div:first-child{min-width:0;flex:1}.answer-button,.match-tile{min-height:72px}.mini-score{min-width:68px;gap:4px;padding:8px 10px;font-size:.8rem}.mini-score span{line-height:1.15}}