:root{color-scheme:light;--paper:#f4f1e8;--card:#fffdf8;--ink:#303b32;--muted:#7c8175;--line:#dddeda;--green:#40563f;--sage:#e5ead9;--orange:#ba6444;--peach:#f3e2d5;--radius:23px;font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;font-synthesis:none}
*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-size:15px;line-height:1.65}button,input,textarea,select{font:inherit}button,a,input,textarea{-webkit-tap-highlight-color:transparent}button,a{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:default;opacity:.5}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid #abbd82;outline-offset:4px}button{color:inherit}h1,h2,h3,p{margin:0}h1{font-size:39px;font-weight:550;line-height:1.25;letter-spacing:-1.1px}h2{font-size:24px;font-weight:550;line-height:1.4;letter-spacing:-.4px}h3{font-size:18px;font-weight:550}small,.small{font-size:12px}.muted{color:var(--muted)}.eyebrow{font-size:11px;font-weight:650;letter-spacing:2px;text-transform:uppercase;color:var(--orange);margin-bottom:12px}.app-shell{display:grid;grid-template-columns:220px minmax(0,1fr);min-height:100dvh}.rail{position:sticky;top:0;height:100dvh;padding:42px 28px;border-right:1px solid var(--line);display:flex;flex-direction:column}.brand{display:flex;align-items:center;gap:11px;font-size:21px;letter-spacing:3px;font-weight:600}.brand small{display:block;font-size:8px;letter-spacing:2px;font-weight:400;color:var(--muted);margin-top:3px}.brand-mark{display:grid;place-items:center;position:relative;width:43px;height:43px;border-radius:14px;background:var(--sage);font-family:Georgia,serif;font-size:33px;font-weight:650;letter-spacing:-4px;line-height:1;color:var(--green);padding-right:3px}.brand-mark span{color:var(--orange);position:absolute;right:6px;top:-5px;font-size:31px}.desktop-nav{display:grid;gap:9px;margin-top:65px}.desktop-nav a{display:flex;gap:14px;align-items:center;padding:12px 18px;border-radius:13px;color:var(--muted)}.desktop-nav a span{font-size:24px;line-height:1}.desktop-nav a.active{color:var(--green);background:#e5eadb;font-weight:600}.rail-note{margin-top:auto;padding:28px 12px 10px}.rail-note p{font-size:14px;line-height:1.9;margin:16px 0;color:#697561}.rail-note small{color:#8b907f}.small-sun{font-size:37px;color:#b8bb8a}main{max-width:1190px;width:100%;padding:46px 57px 65px;margin:0 auto;min-width:0}.page-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:39px}.date-label{color:var(--muted);font-size:12px;letter-spacing:.4px}.mode-pill{display:flex;align-items:center;gap:7px;border:1px solid #d9ddcc;border-radius:30px;padding:5px 11px;font-size:11px;color:#78816b}.mode-pill::before{content:'';width:5px;height:5px;background:#9ba77c;border-radius:50%}.greeting{margin-bottom:32px}.greeting p{margin-top:12px;color:var(--muted);font-size:14px}.hero{position:relative;background:var(--sage);border-radius:var(--radius);overflow:hidden;display:grid;grid-template-columns:1.1fr 1fr;min-height:310px;border:1px solid #dce3d0}.hero-copy{padding:34px;position:relative;z-index:1}.hero h2{font-size:30px;font-weight:550;margin:15px 0 12px;letter-spacing:-.7px}.hero p{color:#6c7861;font-size:13px;max-width:280px}.badge{display:inline-flex;gap:6px;align-items:center;font-size:10px;line-height:1.5;letter-spacing:.8px;color:#6a795b;border:1px solid #becbad;border-radius:30px;padding:4px 10px}.hero .button{margin-top:27px}.hero-art{align-self:end;justify-self:center;width:100%;height:280px;padding-top:14px}.hero-art svg{height:100%;width:100%;display:block}.button{border:0;display:inline-flex;align-items:center;justify-content:center;gap:19px;min-height:45px;padding:11px 20px;border-radius:11px;background:var(--green);color:#fffdf8;font-weight:500;font-size:13px;transition:background .15s,transform .15s}.button:hover:not(:disabled){background:#30482f;transform:translateY(-1px)}.button.secondary{background:var(--card);border:1px solid var(--line);color:var(--ink)}.button.secondary:hover{background:#eeefe5}.button.quiet{background:transparent;color:var(--green);border:1px solid #bfc9b5}.button.danger{color:#aa4c38;border:1px solid #e5c7bc;background:transparent}.button.small{min-height:36px;padding:7px 13px;font-size:12px}.button.wide{width:100%}.arrow{font-size:19px;line-height:1}.section-heading{display:flex;justify-content:space-between;align-items:center;margin:32px 0 15px}.section-heading h2{font-size:17px;letter-spacing:0}.text-link{font-size:12px;color:var(--muted);border:0;background:none;padding:5px;display:inline-flex;align-items:center;gap:9px}.quick-grid{display:grid;grid-template-columns:1fr 1fr;gap:17px;margin-top:19px}.quick-card{display:flex;align-items:center;gap:17px;border:1px solid var(--line);border-radius:19px;background:var(--card);padding:23px;min-height:116px;text-align:left;position:relative}.quick-card:hover{border-color:#b6c4a5}.quick-icon{width:46px;height:46px;display:grid;place-items:center;border-radius:50%;background:#f1e4d4;color:#af7950;font-size:24px;flex-shrink:0}.quick-card:nth-child(2) .quick-icon{background:#e7ebdf;color:#7e8c69}.quick-card h3{font-size:16px;margin-bottom:6px}.quick-card p{font-size:11px;color:var(--muted)}.quick-card>.arrow{margin-left:auto;color:#8b927d}.count-dot{font-size:10px;border-radius:5px;background:#e9eddc;color:#6c7c52;padding:2px 6px;margin-left:7px}.path-grid{display:grid;grid-template-columns:1fr 1fr;gap:17px}.path-card{padding:25px;border:1px solid var(--line);border-radius:19px;background:var(--card);position:relative;overflow:hidden;text-align:left}.path-card .path-number{font-family:Georgia,serif;font-size:13px;color:#a9ad9d;letter-spacing:2px}.path-card h3{margin:15px 0 6px}.path-card p{font-size:12px;color:var(--muted);max-width:260px}.path-card-footer{display:flex;align-items:center;justify-content:space-between;margin-top:25px;font-size:10px;color:var(--muted)}.progress-track{height:3px;background:#e7e8df;border-radius:5px;width:90px;overflow:hidden}.progress-track span{height:100%;display:block;background:#83946b}.home-note{display:flex;gap:18px;align-items:center;margin-top:30px;padding-top:23px;border-top:1px solid var(--line);color:#8a8e80;font-size:11px}.home-note span:first-child{font-family:Georgia,serif;font-size:26px;color:#a0a88b}.mobile-nav{display:none}.notice{border:1px solid #e7d7b9;background:#faf0df;border-radius:13px;padding:12px 15px;font-size:12px;color:#8b7144;margin:18px 0}.notice.subtle{background:#ecefe3;border-color:#dce2d0;color:#6c7c5c}.notice.error{color:#a35038;background:#f7e6e0;border-color:#e8c5b8}.page-title{margin:15px 0 28px}.page-title p{color:var(--muted);font-size:13px;margin-top:11px;max-width:570px}.back-button{background:none;border:0;padding:5px 0;color:var(--muted);font-size:12px;display:flex;align-items:center;gap:10px}.lesson-list{display:grid;gap:12px;margin-top:23px}.lesson-row{width:100%;display:flex;align-items:center;gap:17px;padding:21px;border:1px solid var(--line);background:var(--card);border-radius:16px;text-align:left}.lesson-index{font-family:Georgia,serif;font-size:22px;color:#9ca38c;width:31px;flex-shrink:0}.lesson-row h3{font-size:15px}.lesson-row p{font-size:11px;color:var(--muted);margin-top:5px}.lesson-row .arrow{margin-left:auto;color:#929a83}.method-group{border-top:1px solid var(--line);padding-top:23px;margin-top:27px}.method-group summary{font-size:16px;cursor:pointer}.method-group summary small{font-weight:400;margin-left:9px;color:var(--muted)}.lesson-layout{max-width:750px;margin:auto}.lesson-head{display:flex;justify-content:space-between;align-items:center;gap:15px;margin:25px 0 20px}.step-count{font-size:11px;letter-spacing:1px;color:var(--muted);white-space:nowrap}.step-progress{display:flex;gap:5px;flex:1}.step-progress span{height:4px;background:#e2e3d8;border-radius:10px;flex:1}.step-progress span.done{background:#8c9c77}.step-progress span.current{background:var(--orange)}.activity-card{padding:32px;border:1px solid var(--line);background:var(--card);border-radius:var(--radius)}.activity-card h2{font-size:25px;margin:12px 0 20px}.activity-card .scene{border-radius:16px;background:#ececde;padding:22px;display:flex;align-items:center;gap:18px;margin:22px 0}.scene-icon{width:65px;height:65px;flex-shrink:0}.scene p{font-size:13px;color:#717961}.scene small{font-size:10px;letter-spacing:1px;color:#939c82}.english-model{font-family:Georgia,"Times New Roman",serif;font-size:30px;line-height:1.5;letter-spacing:-.2px;margin:20px 0 8px;color:#3f503b;white-space:pre-wrap}.model-meaning{font-size:13px;color:var(--muted)}.choice-list{display:grid;gap:11px;margin-top:23px}.choice{border:1px solid var(--line);background:white;border-radius:12px;padding:15px 17px;text-align:left;display:flex;align-items:center;gap:14px;font-size:14px}.choice span{border:1px solid #cdd3c3;width:22px;height:22px;display:grid;place-items:center;border-radius:50%;font-size:10px;color:#8d977c;flex-shrink:0}.choice.selected{border-color:#83956c;background:#eef1e7}.choice.incorrect{border-color:#c89078;background:#f7ebe3}.feedback{padding:15px 17px;background:#edf1e4;border-radius:12px;margin-top:18px;color:#64764f;font-size:13px}.feedback.error{background:#f6e9e1;color:#9b654c}.field-label{display:block;font-size:12px;color:#747d69;margin:20px 0 8px}textarea,input[type=text],input[type=password],select{background:#faf9f3;border:1px solid #d9dece;border-radius:11px;padding:13px 14px;width:100%;color:var(--ink);font-size:15px;line-height:1.6}textarea{min-height:108px;resize:vertical}.hint{margin-top:13px;font-size:12px;color:#969a8d;white-space:pre-wrap}.step-footer{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-top:24px}.step-footer .muted{font-size:11px;max-width:280px}.audio-controls{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin:20px 0 13px}.record-button{border:1px solid #d6c2b4;display:flex;align-items:center;gap:10px;background:#f5e8df;color:#9e5f43;border-radius:11px;min-height:43px;padding:10px 15px;font-size:13px}.record-button .record-dot{width:9px;height:9px;background:#b86846;border-radius:50%}.record-button.recording{background:#b86447;color:white}.record-button.recording .record-dot{background:white;border-radius:2px;animation:pulse 1s infinite}.audio-player{width:100%;height:38px;margin:10px 0}audio{max-width:100%}.record-status{font-size:11px;color:#8b8276;margin-top:9px}.pair-note{padding:13px 15px;border-left:2px solid #c3cba9;color:#7e846e;background:#f3f4ea;font-size:12px;margin-top:15px}.screen-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:24px}.empty-state{text-align:center;padding:60px 20px;border:1px dashed #d1d7c5;border-radius:19px;background:#f8f8f0}.empty-state .empty-icon{font-size:38px;color:#9aab7c;display:block;margin-bottom:17px}.empty-state h2{font-size:23px}.empty-state p{color:var(--muted);font-size:13px;max-width:410px;margin:13px auto 25px}.review-end{padding:40px;text-align:center;background:var(--sage);border-radius:var(--radius)}.review-end h2{font-size:29px;margin:15px 0}.review-end p{font-size:13px;color:#6f7b61}.review-ratings{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:24px}.review-ratings button{border:1px solid #d6dccc;background:white;padding:15px 9px;border-radius:11px;font-size:13px}.review-ratings small{display:block;font-size:10px;color:var(--muted);margin-top:5px}.chat-shell{max-width:740px}.chat-topics{display:flex;gap:8px;flex-wrap:wrap;margin:24px 0}.chip{border:1px solid var(--line);border-radius:30px;background:var(--card);padding:7px 14px;font-size:11px}.chip.selected{background:#e6ebd9;border-color:#c7d0b6;color:#5d704b}.chat-thread{display:flex;flex-direction:column;gap:20px;margin:25px 0 30px;min-height:180px}.chat-message{max-width:87%;align-self:flex-start}.chat-message.user{align-self:flex-end}.chat-speaker{font-size:10px;letter-spacing:.7px;color:#8e9780;margin-bottom:5px}.chat-bubble{background:var(--card);border:1px solid var(--line);border-radius:17px 17px 17px 4px;padding:17px 20px;font-size:17px;white-space:pre-wrap}.chat-message.user .chat-bubble{background:#e6ebda;border-color:#dce3ce;border-radius:17px 17px 4px 17px;font-size:15px}.chat-message .text-link{padding-left:0;font-size:11px}.chat-composer{background:var(--card);border:1px solid var(--line);padding:19px;border-radius:18px}.chat-composer textarea{min-height:76px;border:0;background:transparent;padding:0;outline:none}.composer-bottom{display:flex;justify-content:space-between;align-items:center;gap:10px;border-top:1px solid #ebebe3;padding-top:13px;margin-top:10px}.composer-bottom .record-button{background:none;border:0;padding-left:0}.chat-waiting{font-size:13px;color:var(--muted);padding:15px}.recording-card{border:1px solid var(--line);background:var(--card);padding:21px;border-radius:16px;margin-bottom:12px}.recording-card h3{font-size:14px}.recording-meta{display:flex;gap:10px;font-size:10px;color:var(--muted);margin:6px 0 10px}.recording-card p{font-size:12px;color:var(--muted)}.recording-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}.settings-grid{display:grid;grid-template-columns:1fr 1fr;gap:17px}.settings-card{border:1px solid var(--line);background:var(--card);padding:24px;border-radius:18px}.settings-card p{font-size:12px;color:var(--muted);margin-top:10px}.settings-card h3{font-size:16px}.budget-amount{font-family:Georgia,serif;font-size:34px;margin-top:13px;color:#62784d}.budget-amount small{font-family:inherit;font-size:13px;color:#989e8c}.settings-card .button{margin-top:17px}.settings-section{margin-top:32px}.settings-section>h2{font-size:18px;margin-bottom:15px}.disclosure{border-top:1px solid var(--line);margin-top:17px;padding-top:13px;font-size:12px;color:var(--muted)}.disclosure summary{cursor:pointer}.disclosure p{margin-top:10px}.stat-row{display:flex;justify-content:space-between;border-bottom:1px solid #ecece5;padding:9px 0;font-size:12px}.stat-row strong{font-weight:500;color:#5c7050}.login-wrap{min-height:65vh;display:grid;place-items:center}.login-card{width:100%;max-width:430px;padding:36px;background:var(--card);border:1px solid var(--line);border-radius:24px}.login-card h1{font-size:31px;margin:18px 0 13px}.login-card p{font-size:13px;color:var(--muted)}.login-card label{margin-top:28px}.login-card .button{margin-top:18px}.loading-card{min-height:65vh;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:15px;color:var(--muted);font-size:13px}.loading-dot{width:14px;height:14px;border:2px solid #bec8ab;border-top-color:#59704a;border-radius:50%;animation:spin .8s linear infinite}.modal-backdrop{position:fixed;inset:0;background:#27312266;z-index:100;display:grid;place-items:center;padding:22px;backdrop-filter:blur(3px)}.modal{max-width:440px;width:100%;background:var(--card);padding:29px;border-radius:22px;box-shadow:0 20px 100px #24321b22}.modal h2{font-size:23px;margin-bottom:12px}.modal p{font-size:13px;color:var(--muted);white-space:pre-wrap}.modal .screen-actions{justify-content:flex-end}.toast-visible{opacity:1!important;transform:translate(-50%,0)!important}#toast{position:fixed;left:calc(50% + 80px);bottom:30px;padding:12px 20px;background:#344b32;color:white;border-radius:12px;box-shadow:0 7px 30px #27332222;z-index:200;font-size:12px;max-width:90vw;opacity:0;pointer-events:none;transform:translate(-50%,10px);transition:.2s;white-space:pre-wrap}.reading{white-space:pre-wrap;font-size:15px;line-height:2;padding:18px;background:#f1f3e9;border-radius:12px;margin:18px 0}.review-settings{display:flex;gap:9px;align-items:center;flex-wrap:wrap;font-size:12px;margin-top:12px}.review-settings select{width:auto;padding:6px 10px;font-size:11px}.screen-reader-only{position:absolute;width:1px;height:1px;clip:rect(0,0,0,0);overflow:hidden}.saved-pill{font-size:10px;color:#819568;display:inline-flex;gap:5px;align-items:center}.saved-pill::before{content:'✓'}
@keyframes pulse{50%{opacity:.35}}@keyframes spin{to{transform:rotate(360deg)}}
.activity-card .scene.has-visual{display:block;text-align:center}.scene.has-visual svg{display:block;width:100%;height:120px;margin-bottom:12px}.scene.has-visual small{font-size:10px;letter-spacing:1px}
@media(min-width:1500px){main{padding-top:60px}.hero{min-height:340px}.hero-copy{padding:40px}.hero-art{height:310px}}
@media(max-width:1100px){.app-shell{grid-template-columns:175px 1fr}.rail{padding:35px 20px}.brand{font-size:19px;gap:8px}.brand-mark{width:36px;height:39px}.brand small{font-size:6px}.desktop-nav a{padding:11px 13px}main{padding:38px 30px}.hero-copy{padding:27px}.hero h2{font-size:27px}.hero-art{height:250px}.quick-card{padding:20px;gap:12px}.quick-icon{width:40px;height:40px}.path-card{padding:22px}}
@media(max-width:760px){.app-shell{display:block}.rail{display:none}main{padding:25px 21px calc(100px + env(safe-area-inset-bottom));max-width:630px}h1{font-size:32px}.page-top{margin-bottom:30px}.page-top:before{content:'慢慢说';font-size:17px;letter-spacing:3px;font-weight:600;color:#526747}.page-top .date-label{display:none}.mode-pill{font-size:9px;padding:4px 9px}.greeting{margin-bottom:25px}.greeting p{font-size:12px;margin-top:10px}.hero{grid-template-columns:1fr .8fr;min-height:276px}.hero-copy{padding:25px 0 25px 23px}.hero h2{font-size:26px;line-height:1.45;margin:14px 0 8px}.hero p{font-size:11px;line-height:1.8;max-width:200px}.hero .button{margin-top:21px;min-height:40px;padding:9px 14px;gap:16px;font-size:11px}.hero-art{height:230px;width:120%;position:relative;left:-4px}.badge{font-size:8px;padding:3px 8px}.quick-grid{gap:11px;margin-top:13px}.quick-card{display:block;padding:18px 15px;min-height:150px}.quick-icon{width:36px;height:36px;font-size:21px;margin-bottom:12px}.quick-card h3{font-size:14px;margin-bottom:5px}.quick-card p{font-size:10px;line-height:1.7}.quick-card>.arrow{position:absolute;top:21px;right:16px;font-size:16px}.count-dot{font-size:8px;padding:1px 4px}.section-heading{margin-top:28px}.section-heading h2{font-size:16px}.text-link{font-size:10px}.path-grid{gap:11px}.path-card{padding:18px 15px;min-height:190px}.path-card h3{font-size:15px;margin-top:13px}.path-card p{font-size:10px}.path-card-footer{margin-top:21px;font-size:9px}.path-card .path-number{font-size:11px}.progress-track{width:41px}.home-note{font-size:10px;gap:12px;line-height:1.8;margin-top:25px}.home-note span:first-child{font-size:22px}.mobile-nav{position:fixed;z-index:50;bottom:0;left:0;right:0;display:flex;background:#fdfcf6f5;border-top:1px solid #e4e5db;padding:10px 12px calc(10px + env(safe-area-inset-bottom));backdrop-filter:blur(14px)}.mobile-nav a{display:flex;flex:1;flex-direction:column;gap:3px;align-items:center;justify-content:center;color:#94998a;font-size:9px}.mobile-nav a span{font-size:24px;line-height:1.1}.mobile-nav a.active{color:#465f3b}.mobile-nav a.active span{background:#e6ebda;border-radius:9px;width:45px;text-align:center}.page-title{margin:18px 0 24px}.page-title h1{font-size:30px}.page-title p{font-size:12px}.lesson-list{gap:9px}.lesson-row{padding:18px 16px;gap:13px}.lesson-row h3{font-size:14px}.lesson-row p{font-size:10px}.lesson-index{font-size:20px;width:25px}.activity-card{padding:24px 20px;border-radius:20px}.activity-card h2{font-size:22px;margin-bottom:17px}.activity-card .scene{padding:16px;gap:12px}.scene-icon{width:53px;height:53px}.scene p{font-size:12px}.english-model{font-size:27px}.choice{padding:13px 14px;font-size:13px}.step-footer{align-items:flex-start;flex-direction:column;gap:15px}.step-footer>.button{width:100%}.step-footer .muted{font-size:10px}.lesson-head{gap:10px}.step-count{font-size:10px}.step-progress{gap:4px}.audio-controls{gap:8px}.button{font-size:12px;padding:10px 16px;min-height:44px}.button.small{min-height:39px}.review-ratings{gap:7px}.review-ratings button{font-size:12px;padding:13px 6px}.review-ratings small{font-size:9px}.review-end{padding:32px 22px}.review-end h2{font-size:25px}.settings-grid{grid-template-columns:1fr}.settings-card{padding:22px}.chat-bubble{padding:15px 17px;font-size:16px}.chat-message{max-width:94%}.chat-composer{padding:16px}.composer-bottom .record-button{font-size:12px}.login-wrap{min-height:70vh}.login-card{padding:28px 24px}.settings-section{margin-top:27px}#toast{left:50%;bottom:calc(85px + env(safe-area-inset-bottom));width:max-content;max-width:calc(100vw - 36px);font-size:12px}.recording-actions .button{font-size:10px;padding:8px 11px}.notice{font-size:11px}.modal{padding:25px}.screen-actions .button{flex:1;white-space:nowrap}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}