@import"https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap";.app{max-width:1400px;margin:0 auto;padding:20px;min-height:100vh}.app-header{text-align:center;margin-bottom:40px;padding:40px 20px;background:linear-gradient(135deg,#667eea14,#764ba214);border-radius:24px;border:1px solid rgba(255,255,255,.05)}.app-header h1{font-size:3rem;font-weight:800;background:linear-gradient(135deg,#667eea,#764ba2,#f093fb);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:10px;text-shadow:0 0 40px rgba(102,126,234,.3);animation:shimmer 3s ease-in-out infinite}@keyframes shimmer{0%,to{filter:brightness(1)}50%{filter:brightness(1.2)}}.subtitle{font-size:1.2rem;color:#94a3b8;font-weight:400}.tabs{display:flex;gap:12px;justify-content:center;margin-bottom:40px;flex-wrap:wrap;padding:16px;background:#ffffff08;border-radius:20px;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.05)}.tabs button{padding:14px 28px;font-size:1rem;font-weight:600;background:#ffffff0d;border:2px solid rgba(255,255,255,.1);border-radius:14px;color:#e2e8f0;cursor:pointer;transition:all .4s cubic-bezier(.175,.885,.32,1.275);position:relative;overflow:hidden}.tabs button:before{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.1),transparent);transition:left .5s}.tabs button:hover:before{left:100%}.tabs button:hover{background:#ffffff1a;border-color:#667eea80;transform:translateY(-3px);box-shadow:0 10px 30px #667eea33}.tabs button.active{background:linear-gradient(135deg,#667eea,#764ba2);border-color:#667eea;color:#fff;box-shadow:0 8px 25px #667eea66}.content{min-height:500px;animation:fadeIn .3s ease}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.card{background:#ffffff08;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.08);border-radius:20px;padding:24px;transition:all .4s cubic-bezier(.175,.885,.32,1.275);cursor:pointer;position:relative;overflow:hidden}.card:before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,rgba(255,255,255,.2),transparent)}.card:hover{background:#ffffff0f;border-color:#667eea66;transform:translateY(-6px) scale(1.02);box-shadow:0 20px 40px #0000004d,0 0 30px #667eea1a}.card.selected{background:linear-gradient(135deg,#667eea26,#764ba226);border-color:#667eea;box-shadow:0 0 30px #667eea4d,inset 0 0 20px #667eea1a}.grid{display:grid;gap:20px}.grid-letters{grid-template-columns:repeat(auto-fill,minmax(220px,1fr))}.grid-initials{grid-template-columns:repeat(auto-fill,minmax(280px,1fr))}.grid-names{grid-template-columns:repeat(auto-fill,minmax(320px,1fr))}.audio-button{background:linear-gradient(135deg,#667eea33,#764ba233);border:2px solid #667eea;border-radius:50%;width:54px;height:54px;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .3s ease;font-size:1.5rem;position:relative;flex-shrink:0}.audio-button:after{content:"";position:absolute;width:100%;height:100%;border-radius:50%;border:2px solid #667eea;animation:pulse 2s ease-out infinite;opacity:0}@keyframes pulse{0%{transform:scale(1);opacity:.5}to{transform:scale(1.5);opacity:0}}.audio-button:hover{background:linear-gradient(135deg,#667eea66,#764ba266);transform:scale(1.15);box-shadow:0 0 25px #667eea80}.audio-button:active{transform:scale(.95)}.highlight-yellow{color:#fbbf24;text-shadow:0 0 20px rgba(251,191,36,.3)}.highlight-cyan{color:#22d3ee;text-shadow:0 0 20px rgba(34,211,238,.3)}.highlight-green{color:#34d399;text-shadow:0 0 20px rgba(52,211,153,.3)}.highlight-red{color:#f87171;text-shadow:0 0 20px rgba(248,113,113,.3)}.highlight-purple{color:#a78bfa;text-shadow:0 0 20px rgba(167,139,250,.3)}.section-header{margin-bottom:30px;text-align:center}.section-header h2{font-size:2rem;font-weight:700;color:#f1f5f9;margin-bottom:10px}.section-header p{color:#94a3b8;font-size:1.1rem}@media (max-width: 768px){.app-header h1{font-size:2rem}.tabs button{padding:10px 16px;font-size:.9rem}.grid-letters,.grid-initials,.grid-names{grid-template-columns:1fr}.card{padding:16px}}.quickstart-section{animation:fadeIn .6s cubic-bezier(.22,1,.36,1);max-width:1000px;margin:0 auto}.hero-section{text-align:center;margin-bottom:60px;padding:60px 40px;background:radial-gradient(circle at center,rgba(102,126,234,.1) 0%,transparent 70%);border-radius:40px}.hero-section h2{font-size:3.5rem;font-weight:800;margin-bottom:20px;background:linear-gradient(135deg,#fbbf24,#f59e0b);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;filter:drop-shadow(0 0 20px rgba(251,191,36,.2))}.hero-subtitle{font-size:1.4rem;color:#94a3b8;max-width:600px;margin:0 auto}.info-card{background:#ffffff08;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border:1px solid rgba(255,255,255,.08);border-top:1px solid rgba(255,255,255,.15);border-radius:24px;padding:35px 40px;margin-bottom:30px;transition:all .4s ease;box-shadow:0 15px 45px #0003}.info-card:hover{background:#ffffff0d;border-color:#667eea4d;transform:translateY(-4px);box-shadow:0 25px 60px #0000004d}.info-card h3{font-size:1.8rem;font-weight:700;margin-bottom:20px;color:#f1f5f9}.info-card p{color:#94a3b8;line-height:1.8;margin-bottom:20px;font-size:1.1rem}.key-point{display:flex;align-items:flex-start;gap:16px;background:linear-gradient(135deg,#fbbf241a,#f59e0b1a);border-left:4px solid #fbbf24;padding:20px;border-radius:14px;box-shadow:inset 0 0 20px #fbbf240d}.key-point .emoji{font-size:1.5rem}.tones-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:30px}.tone-card{background:#ffffff0a;border-radius:20px;padding:25px 20px;text-align:center;cursor:pointer;transition:all .4s cubic-bezier(.175,.885,.32,1.275);border:1px solid rgba(255,255,255,.05);position:relative;overflow:hidden}.tone-card:before{content:"";position:absolute;top:0;left:0;width:100%;height:4px;background:linear-gradient(90deg,#667eea,#764ba2);opacity:0;transition:opacity .3s}.tone-card:hover{background:#ffffff14;border-color:#667eea4d;transform:translateY(-8px) scale(1.05)}.tone-card:hover:before{opacity:1}.tone-number{font-size:.9rem;font-weight:700;text-transform:uppercase;letter-spacing:.1em;color:#64748b;margin-bottom:12px}.tone-visual{font-size:2.5rem;font-weight:800;color:#fbbf24;margin-bottom:10px;filter:drop-shadow(0 0 10px rgba(251,191,36,.2))}.tone-desc{font-size:1rem;font-weight:600;color:#22d3ee;margin-bottom:8px}.tone-example{font-size:.9rem;color:#94a3b8;margin-bottom:16px;font-style:italic}.play-btn{background:linear-gradient(135deg,#667eea1a,#764ba21a);border:1px solid #667eea;padding:8px 20px;border-radius:30px;color:#a78bfa;font-size:.9rem;font-weight:600;cursor:pointer;transition:all .3s ease}.play-btn:hover{background:linear-gradient(135deg,#667eea4d,#764ba24d);box-shadow:0 0 15px #667eea66;transform:scale(1.05)}.danger-card{border-color:#f8717133;background:linear-gradient(135deg,rgba(248,113,113,.05) 0%,transparent 100%)}.danger-card h3{color:#f87171}.trap-item{display:grid;grid-template-columns:80px 1fr 1fr;gap:20px;padding:16px 24px;background:#0003;border-radius:14px;border:1px solid rgba(255,255,255,.05)}.trap-letter{font-size:2rem;font-weight:800;color:#f1f5f9}.challenge-card{border-color:#a78bfa33;background:linear-gradient(135deg,rgba(167,139,250,.05) 0%,transparent 100%)}.challenge-name{padding:40px;background:#0000004d;border-radius:24px;border:1px solid rgba(255,255,255,.05)}.next-item{background:#667eea0d;border:1px solid rgba(102,126,234,.1);padding:20px 25px;border-radius:16px}.next-num{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;width:40px;height:40px;font-size:1.1rem;box-shadow:0 5px 15px #667eea4d}@media (max-width: 768px){.tones-grid{grid-template-columns:repeat(2,1fr)}.hero-section h2{font-size:2.2rem}}.letters-section{animation:fadeIn .6s cubic-bezier(.22,1,.36,1)}.letter-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}.letter-pinyin{font-size:2.8rem;font-weight:800;letter-spacing:-1px}.letter-details{margin-top:20px;padding-top:20px;border-top:1px solid rgba(255,255,255,.08);display:flex;flex-direction:column;gap:12px}.letter-details>div{display:flex;align-items:baseline;gap:10px}.label{font-size:.85rem;text-transform:uppercase;letter-spacing:.05em;color:#94a3b8;font-weight:500;min-width:90px}.value{font-size:1.1rem;font-weight:600;color:#f1f5f9}.pronunciation{color:#94a3b8;font-style:italic;font-weight:400}.notes{padding:14px;background:#fbbf240d;border-left:4px solid #fbbf24;border-radius:8px;margin-top:10px;font-size:.95rem;line-height:1.5;color:#e2e8f0}.special-section{margin-top:80px;padding-top:40px;border-top:1px solid rgba(255,255,255,.05)}.special-section h3{font-size:2rem;font-weight:800;margin-bottom:24px;text-align:center;background:linear-gradient(135deg,#f093fb,#f5576c);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.initials-finals-section{animation:fadeIn .6s cubic-bezier(.22,1,.36,1)}.mode-switcher{display:flex;gap:12px;justify-content:center;margin-bottom:40px;background:#ffffff08;padding:8px;border-radius:16px;width:fit-content;margin-left:auto;margin-right:auto;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.mode-switcher button{padding:10px 24px;font-size:1rem;font-weight:600;background:transparent;border:1px solid transparent;border-radius:12px;color:#94a3b8;cursor:pointer;transition:all .3s ease}.mode-switcher button:hover{color:#f1f5f9;background:#ffffff0d}.mode-switcher button.active{background:#667eea33;border-color:#667eea4d;color:#a78bfa;box-shadow:0 4px 15px #667eea1a}.category-explanation{background:linear-gradient(135deg,#667eea1a,#764ba21a);border-left:4px solid #667eea;padding:20px 24px;border-radius:12px;margin-bottom:40px;color:#e2e8f0;line-height:1.6;font-size:1.05rem;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px)}.item-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:4px}.item-pinyin{font-size:2.2rem;font-weight:800;margin-right:12px}.item-category{font-size:.85rem;color:#64748b;font-style:italic;font-weight:500}.item-details{margin-top:20px;padding-top:20px;border-top:1px solid rgba(255,255,255,.08);display:flex;flex-direction:column;gap:10px}.item-details>div{display:flex;align-items:baseline;gap:10px}.names-section{animation:fadeIn .6s cubic-bezier(.22,1,.36,1)}.search-box{margin-bottom:40px;display:flex;justify-content:center;position:relative;max-width:600px;margin-left:auto;margin-right:auto}.search-input{width:100%;padding:16px 24px;font-size:1.1rem;background:#ffffff08;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.1);border-top:1px solid rgba(255,255,255,.2);border-radius:16px;color:#f8fafc;outline:none;transition:all .4s ease;box-shadow:0 10px 30px #0000001a}.search-input:focus{background:#ffffff0f;border-color:#667eea;box-shadow:0 15px 40px #667eea33;transform:translateY(-2px)}.search-input::placeholder{color:#64748b}.names-container{display:grid;grid-template-columns:1fr 1fr;gap:40px;margin-bottom:60px}.column-title{font-size:1.8rem;font-weight:800;margin-bottom:24px;text-align:center;background:linear-gradient(135deg,#667eea,#764ba2);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;padding-bottom:12px;position:relative}.column-title:after{content:"";position:absolute;bottom:0;left:30%;right:30%;height:2px;background:linear-gradient(90deg,transparent,rgba(102,126,234,.5),transparent)}.name-card{min-height:54px;padding:10px 16px;border-radius:14px}.name-header{display:flex;justify-content:space-between;align-items:center}.name-pinyin{font-size:1.3rem;font-weight:700;color:#f1f5f9}.name-pronunciation{font-size:.9rem;font-weight:500;color:#94a3b8;font-style:italic}.name-breakdown{margin-top:20px;padding-top:15px;border-top:1px solid rgba(255,255,255,.08)}.breakdown-title{font-size:.9rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;margin-bottom:12px;color:#667eea}.breakdown-item{margin-bottom:8px;display:flex;gap:12px;align-items:center}.breakdown-notes{margin-top:15px;padding:12px;background:#667eea0d;border-left:3px solid #667eea;border-radius:6px;color:#e2e8f0;font-size:.95rem}.name-combination-demo{margin-top:40px;padding:40px;background:#667eea0d;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid rgba(102,126,234,.2);border-radius:24px;text-align:center;position:relative}.name-combination-demo h3{font-size:1.8rem;font-weight:800;margin-bottom:12px;color:#f1f5f9}.name-combination-demo>p{color:#94a3b8;font-size:1.1rem;margin-bottom:30px}.combined-name{margin-top:20px;padding:30px;background:#0003;border-radius:20px;border:1px solid rgba(255,255,255,.05)}.combined-header{display:flex;justify-content:center;align-items:center;gap:24px;flex-wrap:wrap;margin-bottom:20px}.combined-pinyin{font-size:2.5rem;font-weight:800;background:linear-gradient(135deg,#fbbf24,#f59e0b);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;filter:drop-shadow(0 0 10px rgba(251,191,36,.2))}.audio-button-large{padding:14px 32px;font-size:1.1rem;border-radius:50px;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border:none;font-weight:700;transition:all .4s cubic-bezier(.175,.885,.32,1.275);cursor:pointer;display:inline-flex;align-items:center;gap:12px;box-shadow:0 10px 25px #667eea4d}.audio-button-large:hover{transform:scale(1.05) translateY(-2px);box-shadow:0 15px 35px #667eea80}.combined-pronunciation{font-size:1.8rem;font-weight:700;color:#a78bfa;margin-bottom:15px}.combined-note{color:#94a3b8;font-size:1rem}@media (max-width: 1024px){.names-container{grid-template-columns:1fr}}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:linear-gradient(135deg,#0f0c29,#302b63,#24243e);background-attachment:fixed;color:#f8fafc;min-height:100vh;line-height:1.6}body:before{content:"";position:fixed;top:0;left:0;width:100%;height:100%;background:radial-gradient(ellipse at top left,rgba(102,126,234,.1) 0%,transparent 50%),radial-gradient(ellipse at bottom right,rgba(118,75,162,.1) 0%,transparent 50%);pointer-events:none;z-index:-1}code{font-family:SF Mono,Menlo,Monaco,Consolas,Courier New,monospace}#root{min-height:100vh;position:relative}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:#ffffff0d;border-radius:4px}::-webkit-scrollbar-thumb{background:#667eea80;border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#667eeab3}::selection{background:#667eea66;color:#fff}