@charset "UTF-8";
:root{--ink:#243d33;--muted:#78847d;--green:#24664c;--soft:#eef4ec;--orange:#df965a;--paper:#faf9f5;--line:#e5e8df;--white:#fff;--radius:24px}
*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.65 "Segoe UI","Microsoft YaHei",sans-serif}button,input,textarea{font:inherit}button,a,input,textarea{ -webkit-tap-highlight-color:transparent}button{cursor:pointer;border:0;background:none;color:inherit}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid #d6a169;outline-offset:4px}button{min-height:44px}button:hover{filter:brightness(.95)}.header{height:100px;max-width:1240px;margin:auto;display:flex;align-items:center;justify-content:space-between;padding:0 36px;border-bottom:1px solid var(--line);gap:20px}.brand{display:flex;align-items:center;gap:12px;font-weight:700;font-size:21px;white-space:nowrap}.brand small{display:block;font-size:9px;letter-spacing:2px;color:var(--muted);font-weight:500;line-height:1.7}.logo{width:43px;height:43px;border-radius:14px;background:var(--green);color:#fff;display:flex;align-items:center;justify-content:center;font:26px Georgia}.logo span{color:#f0c991}.desktop-nav{display:flex;gap:30px;height:100%;align-items:center}.desktop-nav button{height:100%;position:relative;color:var(--muted)}.desktop-nav .selected{color:var(--green);font-weight:600}.desktop-nav .selected:after{content:"";position:absolute;height:3px;bottom:0;left:25%;right:25%;border-radius:3px;background:var(--green)}.preferences{display:flex;align-items:center;gap:12px}.language{font-size:12px;color:var(--muted);white-space:nowrap}main{max-width:1120px;min-height:calc(100vh - 230px);padding:48px 20px 52px;margin:auto}.hero{display:grid;grid-template-columns:1.2fr .8fr;gap:50px;align-items:center;margin-bottom:38px}.eyebrow{display:flex;align-items:center;gap:8px;font-size:11px;font-weight:600;letter-spacing:2px;color:var(--green);margin-bottom:16px}.eyebrow:before{content:"";height:6px;width:6px;border-radius:50%;background:#e7a772}h1{font-weight:650;font-size:48px;line-height:1.35;letter-spacing:-2px;margin:0 0 16px}h1 em{font-style:normal;color:var(--green)}.hero p{color:var(--muted);margin:0;max-width:480px}.hero-art{height:230px;position:relative;border-radius:50%;background:radial-gradient(ellipse,#e8efe0 0,transparent 65%);display:flex;align-items:center;justify-content:center}.floating-letter{position:absolute;border-radius:22px;background:#fff;border:1px solid #ebeee5;box-shadow:0 14px 30px #314e3110;font:65px Georgia;display:flex;align-items:center;justify-content:center;width:110px;height:128px}.floating-letter.a{left:35px;top:45px;transform:rotate(-11deg);color:var(--green)}.floating-letter.o{left:137px;top:10px;transform:rotate(6deg);color:#c18c4c}.floating-letter.e{left:230px;top:83px;transform:rotate(13deg);color:#71928b}.art-label{position:absolute;font-size:11px;background:#edf3e7;padding:5px 14px;border-radius:20px;bottom:6px;left:88px;color:#739064}.star{position:absolute;color:#dab387;font-size:28px;right:15px;top:20px}.query-box{background:white;border:1px solid var(--line);border-radius:var(--radius);padding:25px 28px;box-shadow:0 12px 34px #334c3305}.query-label{font-weight:600;font-size:14px;display:flex;justify-content:space-between;margin-bottom:12px}.query-label small{font-size:11px;font-weight:400;color:var(--muted)}.query-input{display:flex;background:#f7f8f3;border:1px solid #e6eadf;border-radius:14px;align-items:center;padding:12px 14px 12px 18px;gap:16px}.query-input:focus-within{border-color:#77a08a}.query-input textarea{resize:vertical;border:0;outline:none;background:transparent;min-height:45px;height:54px;max-height:200px;flex:1;min-width:0;line-height:1.7;font-size:17px;color:var(--ink);padding:10px 0}.query-input textarea::placeholder{color:#a0a69d}.primary{background:var(--green);color:white;padding:12px 22px;border-radius:11px;white-space:nowrap;font-weight:500;font-size:14px}.primary .arrow{margin-left:15px}.examples{display:flex;align-items:center;gap:9px;margin-top:15px;flex-wrap:wrap;color:var(--muted);font-size:12px}.examples button{padding:3px 12px;min-height:30px;border:1px solid #e7ebe2;border-radius:7px;font-size:12px;color:#667668}.micro{font-size:11px;color:var(--muted)}.query-bottom{display:flex;justify-content:space-between;gap:12px;margin-top:12px}.features{display:flex;gap:24px;font-size:12px;color:var(--muted);margin:19px 4px 36px}.features span:before{content:"✓";color:#719781;margin-right:6px}.intro-card{border:1px solid #dbe5d5;background:#eff4e9;border-radius:var(--radius);padding:27px 30px;display:flex;align-items:center;gap:24px}.seed-icon{flex-shrink:0;width:64px;height:64px;border-radius:18px;background:#e0e9d6;display:flex;align-items:center;justify-content:center}.seed-icon svg{width:40px}.intro-copy{flex:1}.intro-copy h2{font-size:21px;margin:0 0 5px;font-weight:600}.intro-copy p{font-size:13px;color:#76826e;margin:0}.secondary{border:1px solid #cddcca;border-radius:10px;padding:10px 17px;color:var(--green);font-size:13px;background:#fff8;white-space:nowrap}.section-heading{display:flex;align-items:center;justify-content:space-between;margin:31px 0 16px}.section-heading h2{font-size:17px;font-weight:600;margin:0}.section-heading span{font-size:12px;color:var(--muted)}.quick-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.quick-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:20px;text-align:left;display:flex;align-items:center;gap:15px;min-height:105px}.quick-symbol{width:45px;height:45px;background:#f5f2e9;border-radius:12px;display:flex;align-items:center;justify-content:center;font:27px Georgia;color:#af8858}.quick-card strong{display:block;font-size:14px;font-weight:600}.quick-card small{font-size:11px;color:var(--muted)}.quick-card .go{margin-left:auto;color:#98a18f}footer{max-width:1080px;margin:auto;border-top:1px solid var(--line);padding:23px 0 47px;display:flex;justify-content:space-between;font-size:11px;color:#899186;gap:18px}footer div{display:flex;gap:19px}footer button{font-size:11px;min-height:20px;padding:0}.mobile-nav{display:none}.prototype-note{position:fixed;right:12px;bottom:10px;z-index:5;font-size:10px;color:#899186;background:#faf9f5e8;border-radius:6px;padding:4px 9px}.toast{position:fixed;bottom:55px;left:50%;transform:translateX(-50%);background:#263e33;color:white;border-radius:12px;padding:12px 22px;font-size:13px;z-index:30;max-width:90%;opacity:0;pointer-events:none;transition:opacity .2s}.toast.show{opacity:1}dialog{border:1px solid var(--line);border-radius:20px;padding:28px;max-width:500px;color:var(--ink);background:var(--paper)}dialog::backdrop{background:#20382d55}dialog h2{font-size:23px}dialog p{font-size:14px}.page-heading{margin-bottom:25px}.page-heading h1{font-size:34px;letter-spacing:-1px;margin:5px 0 8px}.page-heading p{color:var(--muted);font-size:14px;margin:0}.pill{display:inline-flex;border-radius:20px;padding:4px 12px;background:var(--soft);color:var(--green);font-size:11px}.result-card,.lesson-card,.guide-card{margin-top:22px;border:1px solid var(--line);border-radius:var(--radius);background:white;padding:28px}.result-top{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:24px}.result-top h2{font-size:16px;margin:0}.result-actions{display:flex;gap:8px}.play{background:var(--green);color:white;padding:10px 15px;border-radius:10px;font-size:13px}.outline{border:1px solid var(--line);padding:9px 15px;border-radius:10px;font-size:13px}.ruby-text{display:flex;flex-wrap:wrap;align-items:center;gap:6px;line-height:2.8;padding:14px 0 8px}.char-button{font-size:38px;min-width:55px;padding:6px 9px;line-height:1.8;border-radius:12px;min-height:93px}.char-button:hover{background:var(--soft)}ruby rt{font:17px "Segoe UI",sans-serif;line-height:1.3;color:var(--green)}.note{background:#f7f6ef;padding:14px 17px;border-radius:12px;color:#7d7c60;font-size:12px;margin-top:16px}.note strong{color:#6b6d49}.detail-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:20px}.info-card{background:#fff;border:1px solid var(--line);border-radius:17px;padding:24px}.info-card h3{font-size:14px;margin:0 0 15px}.big-pinyin{font:80px Georgia;color:var(--green);line-height:1.35}.pinyin-display{display:flex;align-items:center;gap:30px}.pinyin-meta{display:flex;gap:8px;flex-wrap:wrap;margin:10px 0}.tag{font-size:12px;border-radius:7px;padding:5px 10px;background:#f0f3eb;color:#718066}.muted{color:var(--muted);font-size:13px}.tones{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}.tone-card{border:1px solid var(--line);border-radius:16px;padding:20px 8px;text-align:center;background:#fff}.tone-card .tone-word{font:39px Georgia;color:var(--green);display:block}.tone-card .tone-line{display:block;font-size:32px;color:#c3a06a;height:40px}.tone-card small{font-size:11px;color:var(--muted)}.tone-card strong{display:block;font-size:15px;margin-top:8px}.tone-card.selected{background:var(--soft);border-color:#9fbaa3}details{border-top:1px solid var(--line);margin-top:16px;padding-top:15px;font-size:13px}summary{cursor:pointer;color:var(--green);min-height:36px}.mode-title{display:flex;align-items:center;justify-content:space-between;gap:15px}.tabs{display:flex;gap:5px;background:#eceedf;padding:5px;border-radius:12px;width:fit-content;margin:26px 0}.tabs button{border-radius:8px;padding:8px 22px;font-size:14px}.tabs .selected{background:#fff;color:var(--green);box-shadow:0 3px 7px #42552c09}.learn-layout{display:grid;grid-template-columns:230px 1fr;gap:22px}.lesson-index{padding:16px;background:#f0f2e9;border-radius:20px;align-self:start}.lesson-index h3{font-size:13px;padding:0 12px;color:#7b8770}.lesson-index button{display:flex;align-items:center;gap:11px;width:100%;text-align:left;padding:10px 12px;border-radius:10px;font-size:13px;color:#748069;margin-bottom:5px}.lesson-index button.selected{background:#fff;color:var(--green)}.step-num{font-size:11px;color:#929b86}.lesson-card{margin:0;padding:28px 34px}.lesson-top{display:flex;align-items:center;justify-content:space-between;font-size:12px;color:var(--muted)}.progress{height:5px;border-radius:4px;background:#edf0e5;margin:12px 0 25px}.progress span{display:block;height:5px;background:#82a282;border-radius:4px}.lesson-card h2{font-size:25px;margin:0 0 10px}.lesson-example{background:#f5f7ef;border-radius:17px;text-align:center;padding:20px;margin:20px 0}.lesson-example .big-pinyin{font-size:90px}.lesson-example p{font-size:13px;margin:4px 0 12px;color:var(--muted)}.quiz{border-top:1px solid var(--line);padding-top:20px}.quiz h3{font-size:14px;margin:0 0 10px}.quiz-options{display:flex;gap:10px}.quiz-options button{flex:1;border:1px solid var(--line);border-radius:10px;background:#fff;font-size:25px;padding:7px}.quiz-options button.chosen{border-color:var(--green);background:var(--soft)}.quiz-feedback{min-height:42px;padding-top:10px;font-size:12px;color:var(--green)}.lesson-bottom{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-top:10px}.guide-categories{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:20px}.guide-categories button{border-radius:9px;background:#edeFE5;padding:5px 15px;font-size:12px}.guide-card{margin-top:14px}.guide-card h2{font-size:18px;margin:0 0 6px}.letter-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:12px;margin:19px 0}.letter-grid button{border:1px solid var(--line);background:#fbfcf8;border-radius:12px;font:35px Georgia;color:var(--green);min-height:72px;display:flex;flex-direction:column;align-items:center;justify-content:center}.letter-grid small{font:10px "Microsoft YaHei",sans-serif;color:#9aA18f}.writing-demo{width:100%;height:150px;border-radius:12px;background:#fcfcf7;margin:12px 0}.writing-demo .stroke{stroke:#2e7455;stroke-width:7;fill:none;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:360;stroke-dashoffset:0}.writing-demo.animate .stroke{animation:write 2s ease both}.writing-demo.animate .stroke:nth-of-type(2){animation-delay:1s}@keyframes write{from{stroke-dashoffset:360}to{stroke-dashoffset:0}}.stroke-label{font-size:12px;fill:#b7bdac}.writing-tools{display:flex;gap:7px;flex-wrap:wrap}.writing-tools button{border:1px solid var(--line);border-radius:8px;padding:6px 15px}.writing-tools .selected{background:var(--soft);border-color:#adc1aa}.error{border:1px solid #eadac9;background:#fff9f3;padding:22px;border-radius:17px;margin-top:20px;font-size:14px}.mini-link{color:var(--green);font-size:12px;padding:0}.mode-badge{font-size:11px;color:#ae8857;margin-left:8px}
@media(min-width:1400px){main{padding-top:54px}.hero{margin-bottom:44px}h1{font-size:51px}}
@media(max-width:900px){.header{padding:0 24px}.hero{gap:12px}.hero-art{transform:scale(.8);transform-origin:center}.learn-layout{grid-template-columns:180px 1fr}.lesson-card{padding:25px}.quick-card{padding:15px;gap:10px}footer{margin:0 25px}.desktop-nav{gap:18px}h1{font-size:39px}}
@media(max-width:650px){.header{height:78px;padding:0 20px;gap:7px}.brand{font-size:17px;gap:8px}.brand small{font-size:7px;letter-spacing:1px}.logo{width:35px;height:35px;font-size:23px;border-radius:11px}.desktop-nav{display:none}.preferences{gap:4px}.language{font-size:10px;padding:0 4px}.hero-art{display:none}main{padding:32px 20px 35px;min-height:calc(100vh - 240px)}.hero{display:block;margin-bottom:25px}.eyebrow{font-size:9px;margin-bottom:13px}h1{font-size:34px;letter-spacing:-1px;margin-bottom:13px}.hero p{font-size:13px;line-height:1.9;max-width:310px}.query-box{padding:20px 17px;border-radius:20px}.query-label{font-size:13px}.query-label small{font-size:10px}.query-input{display:block;padding:8px 12px}.query-input textarea{width:100%;height:65px;resize:vertical;font-size:15px}.query-input .primary{display:block;width:100%;margin:4px 0;font-size:13px}.examples{font-size:10px;gap:6px}.examples button{font-size:11px;padding:2px 9px;min-height:30px}.query-bottom .micro{font-size:10px}.features{gap:13px;font-size:10px;margin:15px 1px 27px}.intro-card{padding:22px 19px;gap:13px;align-items:flex-start;flex-wrap:wrap;border-radius:20px}.seed-icon{width:43px;height:43px;border-radius:12px}.seed-icon svg{width:30px}.intro-copy h2{font-size:17px}.intro-copy p{font-size:11px}.intro-card .secondary{width:100%;background:#fff9;margin-top:1px;font-size:12px}.section-heading{margin:26px 0 13px}.section-heading h2{font-size:15px}.section-heading span{font-size:10px}.quick-grid{gap:8px;grid-template-columns:repeat(3,1fr)}.quick-card{padding:14px 8px;display:flex;flex-direction:column;gap:9px;text-align:center;min-height:115px;border-radius:13px}.quick-symbol{width:33px;height:33px;font-size:23px;border-radius:9px}.quick-card strong{font-size:11px}.quick-card small{font-size:9px}.quick-card .go{display:none}footer{padding:20px 0 110px;font-size:10px;display:block;margin:0 20px}footer div{margin-top:9px;gap:16px;flex-wrap:wrap}footer button{font-size:10px}.mobile-nav{display:flex;position:fixed;bottom:0;left:0;right:0;background:#fffF;border-top:1px solid var(--line);padding:6px 15px calc(7px + env(safe-area-inset-bottom));z-index:10}.mobile-nav button{flex:1;color:#929b89;display:flex;flex-direction:column;line-height:1.4;font-size:22px;align-items:center}.mobile-nav button span{font-size:10px}.mobile-nav .selected{color:var(--green)}.prototype-note{position:static;text-align:center;padding:0 12px 85px;margin-top:-90px;font-size:9px}.toast{bottom:90px;font-size:12px;width:max-content;max-width:90%}.page-heading h1{font-size:28px}.page-heading p{font-size:12px}.result-card,.guide-card{padding:20px 17px;border-radius:20px}.result-top{align-items:flex-start;gap:8px;margin-bottom:15px;flex-wrap:wrap}.result-top h2{font-size:14px}.result-actions{gap:6px}.play,.outline{padding:8px 11px;font-size:11px}.char-button{font-size:32px;min-width:45px;min-height:80px;padding:5px 6px}ruby rt{font-size:14px}.detail-grid{grid-template-columns:1fr;gap:12px}.info-card{padding:20px}.big-pinyin{font-size:65px}.pinyin-display{gap:22px}.tones{gap:6px}.tone-card{padding:12px 4px;border-radius:11px}.tone-card .tone-word{font-size:27px}.tone-card .tone-line{font-size:23px;height:33px}.tone-card small{font-size:9px}.tone-card strong{font-size:13px}.note{font-size:11px;padding:12px}.tabs{width:100%;margin:20px 0}.tabs button{flex:1;font-size:12px;padding:7px 10px}.learn-layout{display:flex;flex-direction:column;gap:14px}.lesson-index{width:100%;padding:9px 12px;display:flex;overflow:auto;border-radius:12px;gap:5px}.lesson-index h3{display:none}.lesson-index button{margin:0;white-space:nowrap;width:auto;padding:5px 10px;font-size:11px;min-height:36px}.step-num{font-size:10px}.lesson-card{padding:21px 19px;border-radius:20px;width:100%}.lesson-card h2{font-size:22px}.lesson-top{font-size:10px}.lesson-example{padding:15px;margin:16px 0}.lesson-example .big-pinyin{font-size:78px}.lesson-example p{font-size:12px}.quiz h3{font-size:12px}.lesson-bottom .primary{font-size:12px;padding:10px 15px}.guide-card h2{font-size:16px}.letter-grid{gap:7px}.letter-grid button{min-height:54px;font-size:26px}.letter-grid small{font-size:8px}.guide-categories{gap:6px}.guide-categories button{font-size:10px;min-height:35px;padding:5px 11px}.mode-title .pill{font-size:10px}.writing-demo{height:132px}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
@media(max-width:650px){.header{display:grid;grid-template-columns:minmax(0,1fr) auto;grid-template-rows:78px 46px;height:124px;padding:0 20px;column-gap:7px;row-gap:0}.header .brand{grid-column:1;grid-row:1}.header .preferences{grid-column:2;grid-row:1}.header .desktop-nav{display:flex;grid-column:1 / -1;grid-row:2;width:100%;height:46px;gap:0;border-top:1px solid var(--line);align-items:stretch}.header .desktop-nav button{flex:1;min-width:0;height:46px;font-size:13px;white-space:nowrap;text-align:center}.header .desktop-nav .selected:after{left:30%;right:30%;height:3px}}