:root{--bg:#f6f7f3;--paper:#fff;--ink:#22362e;--muted:#7b837c;--line:#e4e8df;--green:#2c5947;--green-dark:#223f34;--lime:#d9eea2;--soft:#edf2e7;--radius:16px;font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg);font-synthesis:none}*{box-sizing:border-box}body{margin:0;font-size:14px;line-height:1.6}button,input,textarea{font:inherit}button,a,input,textarea{-webkit-tap-highlight-color:transparent}a{color:inherit;text-decoration:none}button{color:inherit;cursor:pointer}button:disabled{opacity:.45;cursor:not-allowed}button{border:0}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid #93b77d;outline-offset:4px}svg{width:20px;height:20px;display:block}h1,h2,h3,p{margin:0}button span[data-icon]{pointer-events:none}.skip-link{position:fixed;top:-60px;left:15px;z-index:50;background:var(--green);color:white;padding:10px}.skip-link:focus{top:10px}.sidebar{position:fixed;inset:0 auto 0 0;width:230px;border-right:1px solid var(--line);background:#fbfcf8;padding:38px 24px 24px;display:flex;flex-direction:column;z-index:10}.brand{display:flex;align-items:center;gap:11px;font-weight:750;font-size:23px;letter-spacing:-.8px;line-height:1.2}.brand small{font-size:11px;color:var(--muted);font-weight:500;letter-spacing:2px;display:block;margin-top:7px}.brand-icon{background:var(--green);color:var(--lime);width:40px;height:44px;border-radius:13px;display:grid;place-items:center}.brand-icon svg{width:29px;height:29px}.nav-label{font-size:10px;letter-spacing:1.5px;color:#949c93;font-weight:650;margin:49px 12px 12px}.nav-link{display:flex;gap:12px;align-items:center;width:100%;padding:13px 14px;border-radius:9px;background:transparent;text-align:left;color:#778078;margin-bottom:5px;font-weight:550}.nav-link.active{background:#e8efdf;color:#294c39}.nav-link:hover{background:#eff2e9}.nav-link>span:last-child:not(:first-child){margin-left:auto}.nav-link svg{width:18px;height:18px}.nav-count{font-size:10px;padding:0 6px;border:1px solid #d1dbc8;border-radius:4px}.sidebar-note{margin:46px 12px 0}.tiny-label{font-size:9px;font-weight:700;letter-spacing:1.3px;color:#8b9688}.sidebar-note p{font-size:16px;line-height:1.9;margin-top:12px;font-weight:500;letter-spacing:1px}.sound-bars{display:flex;align-items:center;gap:5px;margin-top:20px;height:31px;opacity:.7}.sound-bars i{background:#b7c89f;border-radius:3px;width:3px;height:13px}.sound-bars i:nth-child(3n){height:28px}.sound-bars i:nth-child(2n){height:19px}.sound-bars i:nth-child(5n){height:7px}.sidebar-bottom{margin-top:auto;padding-top:35px}.side-progress-label{display:flex;justify-content:space-between;font-size:11px;margin-bottom:10px}.side-progress-label strong{font-weight:650}.progress-track{height:5px;background:#e6ebdf;border-radius:4px;overflow:hidden}.progress-track>span{display:block;background:#6c925c;height:100%;width:0;transition:width .3s}.save-status{display:flex;align-items:center;gap:6px;color:var(--muted);font-size:10px;margin-top:22px}.save-status svg{height:13px;width:13px}.storage-explain{font-size:10px;color:#a0a69d;line-height:1.7;margin-top:5px}.workspace{margin-left:230px}.topbar{height:77px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 44px;font-size:11px;color:#899086}.breadcrumb{display:flex;gap:12px}.breadcrumb b{font-weight:500;color:#4b5a4f}.topbar-label{display:flex;align-items:center;gap:7px}.live-dot{width:6px;height:6px;background:#82a663;border-radius:50%}main{max-width:1280px;margin:auto;padding:37px 44px 45px;min-height:calc(100vh - 142px)}.eyebrow{font-size:10px;font-weight:700;letter-spacing:2px;color:#829079}.page-heading{display:flex;align-items:flex-end;justify-content:space-between;margin-bottom:27px}.page-heading h1{font-size:30px;line-height:1.4;letter-spacing:-.7px;margin-top:5px;font-weight:700}.subtitle{color:var(--muted);font-size:12px;margin-top:8px}.text-button{display:inline-flex;align-items:center;gap:6px;background:transparent;color:#68775e;font-size:12px;padding:6px 0}.text-button svg{width:15px;height:15px}.hero-grid{display:grid;grid-template-columns:1.55fr 1fr;gap:18px}.hero{position:relative;background:var(--green-dark);border-radius:var(--radius);color:#f4f6ed;padding:28px 30px;overflow:hidden;display:flex;justify-content:space-between;align-items:center;min-height:207px;gap:16px}.hero .eyebrow{color:#b8c9a6;font-size:9px;letter-spacing:1.7px}.hero h2{font-size:27px;font-weight:550;letter-spacing:1px;line-height:1.5;margin-top:10px}.hero h2 em{color:var(--lime);font-style:normal}.hero p{color:#b7c7b8;font-size:11px;line-height:1.9;margin-top:13px}.progress-ring{width:123px;height:123px;flex-shrink:0;border-radius:50%;background:conic-gradient(var(--lime) calc(var(--progress)*1%),#496152 0);padding:5px;display:grid;place-items:center}.progress-ring-inner{width:100%;height:100%;border-radius:50%;background:var(--green-dark);display:flex;flex-direction:column;align-items:center;justify-content:center}.progress-ring strong{font-size:32px;font-weight:500;line-height:1.1;letter-spacing:-1px}.progress-ring strong small{font-size:15px;margin-left:2px;letter-spacing:0}.progress-ring span{font-size:10px;color:#bfd0b8;margin-top:10px}.continue-card{background:#eaf0e1;border:1px solid #dfe7d4;border-radius:var(--radius);padding:25px 26px;display:flex;flex-direction:column}.continue-top{display:flex;justify-content:space-between;align-items:center}.pill{display:inline-flex;align-items:center;gap:6px;font-size:10px;font-weight:600;padding:3px 9px;background:#fff9;color:#567044;border-radius:5px}.continue-card .day-number{font-size:10px;letter-spacing:1px;color:#71815f}.continue-card h3{font-size:22px;font-weight:650;margin-top:13px}.continue-card p{font-size:11px;color:#7d896e;margin-top:2px}.continue-link{display:flex;align-items:center;justify-content:space-between;font-size:12px;font-weight:600;margin-top:auto;padding-top:17px}.circle-arrow{display:grid;place-items:center;background:var(--green);color:white;width:28px;height:28px;border-radius:50%}.circle-arrow svg{width:16px;height:16px}.stats{display:grid;grid-template-columns:repeat(3,1fr);margin-top:20px;background:white;border:1px solid var(--line);border-radius:12px;padding:17px 0}.stat{display:flex;align-items:center;gap:12px;padding:0 23px;border-right:1px solid var(--line)}.stat:last-child{border:0}.stat-icon{width:35px;height:35px;border-radius:10px;display:grid;place-items:center;background:#f4f6ee;color:#81936b}.stat-icon svg{width:18px;height:18px}.stat strong{font-size:21px;line-height:1.1;font-weight:600;font-variant-numeric:tabular-nums}.stat strong small{font-size:10px;font-weight:400;color:var(--muted);margin-left:6px}.stat p{font-size:10px;color:var(--muted);margin-top:3px}.course-header{margin-top:35px;display:flex;justify-content:space-between;align-items:center;gap:16px}.course-header h2{font-size:18px;font-weight:650}.course-header h2 small{font-size:11px;font-weight:400;color:var(--muted);margin-left:10px}.course-controls{display:flex;gap:12px;align-items:center}.filters{display:flex;padding:3px;background:#eaece5;border-radius:7px}.filters button{border-radius:5px;background:transparent;font-size:10px;padding:5px 10px;color:#7b8374;white-space:nowrap}.filters button.active{color:#384b30;background:white;box-shadow:0 1px 3px #2532240a}.search{display:flex;align-items:center;gap:7px;background:#fff;border:1px solid var(--line);padding:6px 9px;border-radius:7px}.search svg{width:13px;height:13px;color:#87917e}.search input{border:0;width:110px;outline:0;background:transparent;font-size:11px;color:var(--ink)}.week-section{margin-top:24px}.week-header{display:flex;align-items:center;gap:11px;margin-bottom:12px}.week-index{font-size:10px;color:#6a8058;background:#e8eddf;border-radius:5px;padding:4px 7px;font-weight:650}.week-header h3{font-size:13px;font-weight:600}.week-header .week-desc{font-size:10px;color:#8a9283}.week-total{margin-left:auto;font-size:10px;color:#89927e}.week-total b{color:#647758;font-weight:550}.week-cards{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:9px}.day-card{position:relative;min-height:136px;background:white;border:1px solid var(--line);border-radius:10px;transition:transform .18s,border-color .18s,box-shadow .18s}.day-card:hover{border-color:#bdcdaa;transform:translateY(-2px);box-shadow:0 5px 14px #21321b06}.day-card.recommended{border-color:#93ab72;background:#f9fbf4}.day-card.completed{background:#edf3e6;border-color:#d5e2c9}.day-card-link{display:block;height:100%;padding:14px 12px 39px}.card-day{display:block;color:#89957d;font-size:9px;letter-spacing:1px;font-weight:600}.day-card h4{font-size:12px;line-height:1.6;font-weight:550;margin:12px 0 0;word-break:break-word}.day-card.completed 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svg{width:15px;height:15px}.primary-button{background:var(--green);color:white}.primary-button:hover{background:#3a6a54}.primary-button svg{width:16px;height:16px}.lesson-title{display:flex;justify-content:space-between;align-items:center;gap:20px}.lesson-title h1{font-size:32px;margin:4px 0 7px;line-height:1.5;font-weight:650}.lesson-title p{color:var(--muted);font-size:13px}.complete-button{border:1px solid #b8cba4;color:#48623a;background:#eff5e8}.complete-button.checked{background:#e5eedc}.complete-button .day-checkbox{margin-right:3px}.lesson-tags{display:flex;gap:16px;color:#839075;margin:17px 0 29px;font-size:11px}.lesson-tags span{display:flex;gap:5px;align-items:center}.lesson-tags svg{width:14px;height:14px}.lesson-layout{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:23px;align-items:start}.lesson-panel{background:white;border:1px solid var(--line);border-radius:14px;overflow:hidden}.tabs{display:flex;border-bottom:1px solid var(--line);padding:0 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15px;display:flex;gap:12px;align-items:flex-start;margin-top:10px}.phrase-number{font-size:9px;font-weight:600;background:#f1f5e9;color:#94a27f;border-radius:5px;min-width:23px;height:23px;display:grid;place-items:center;margin-top:1px}.phrase-copy{flex:1;min-width:0}.phrase .en{font-size:16px;line-height:1.7;font-weight:500;overflow-wrap:anywhere}.zh{font-size:11px;color:#8a9380;line-height:1.7;margin-top:5px}.icon-button{width:31px;height:31px;border-radius:7px;background:#f2f5eb;color:#7b9366;display:grid;place-items:center;flex-shrink:0}.icon-button svg{width:16px;height:16px}.icon-button:hover{background:#e6eddb}.speech-off{font-size:11px;color:#8b7957;line-height:1.7;background:#fbf8ee;padding:10px 14px;margin-bottom:12px;border-radius:8px}.practice-hint{display:flex;gap:9px;font-size:11px;line-height:1.9;background:#f4f7ee;border-radius:8px;color:#7c8b6a;padding:13px 14px;margin-top:20px}.practice-hint svg{width:16px;height:16px;flex-shrink:0;margin-top:2px}.lesson-aside{display:flex;flex-direction:column;gap:17px}.aside-box{background:#edf2e6;border:1px solid #e0e7d7;border-radius:12px;padding:20px}.aside-box h3{font-size:13px;font-weight:600;display:flex;align-items:center;gap:8px}.aside-box h3 svg{width:16px;height:16px;color:#83996f}.aside-box p{font-size:11px;line-height:1.9;color:#7b896c;margin-top:10px}.mini-routine{list-style:none;margin:16px 0 0;padding:0;display:flex;flex-direction:column;gap:11px}.mini-routine li{display:flex;justify-content:space-between;font-size:11px;color:#718061}.mini-routine li span:first-child{display:flex;gap:8px;align-items:center}.mini-routine li i{width:5px;height:5px;border-radius:50%;background:#a0b68a}.mini-routine li b{font-size:10px;font-weight:500;color:#95a185}.note-box{background:white;border-color:var(--line)}.note-box textarea{width:100%;min-height:160px;border:0;resize:vertical;background:#f8f9f5;outline-offset:2px;padding:11px;margin-top:14px;border-radius:7px;font-size:12px;line-height:1.9;color:#4d6044}.note-box textarea::placeholder{font-size:11px;color:#a1aa97}.note-status{font-size:9px;display:flex;justify-content:space-between;color:#9ca68f;margin-top:6px}.lesson-end{display:flex;align-items:center;justify-content:space-between;gap:15px;padding:19px 23px;border-top:1px solid var(--line);background:#fbfcf8}.lesson-end p{font-size:10px;color:#8c967f}.lesson-end .primary-button{font-size:11px}.dialogue{display:flex;flex-direction:column;gap:18px}.dialogue-line{display:flex;gap:10px;max-width:93%;align-items:flex-start}.dialogue-line.mine{margin-left:auto;flex-direction:row-reverse}.avatar{font-size:10px;display:grid;place-items:center;width:29px;height:29px;border-radius:9px;background:#e9eee2;color:#7a8969;flex-shrink:0;margin-top:4px}.mine .avatar{background:#355940;color:#eaf2df}.bubble{padding:14px 17px;background:#f4f6f0;border-radius:0 12px 12px 12px}.mine .bubble{background:#eaf1e1;border-radius:12px 0 12px 12px}.bubble .en{font-size:14px;line-height:1.8}.bubble .icon-button{float:right;margin-left:8px;width:23px;height:23px;background:transparent}.challenge-card{border:1px solid #e4e9db;border-radius:10px;padding:20px;margin-bottom:17px}.challenge-card .eyebrow{font-size:9px;letter-spacing:1px}.challenge-card h3{font-size:15px;margin:7px 0 11px}.challenge-card p{font-size:13px;line-height:1.9;color:#66775b}.challenge-card.accent{background:#f1f6e8;border-color:#d8e4ca}.challenge-card ol{margin:12px 0 0;padding-left:18px;color:#7b896e;font-size:12px;line-height:2.1}.reading-hidden .zh{display:none}.all-done{padding:9px 14px;background:#eaf1df;border:1px solid #dce7cc;border-radius:9px;color:#637a4f;font-size:12px;margin-bottom:20px}#toast{position:fixed;bottom:25px;left:calc(50% + 115px);transform:translate(-50%,20px);z-index:80;background:#293e31;color:#f1f7e8;padding:12px 22px;border-radius:10px;box-shadow:0 5px 20px #21311f1a;font-size:12px;opacity:0;pointer-events:none;transition:.2s;max-width:calc(100vw - 32px);text-align:center}#toast.show{opacity:1;transform:translate(-50%,0)}dialog{border:1px solid var(--line);border-radius:19px;padding:36px;width:min(530px,calc(100vw - 32px));color:var(--ink);box-shadow:0 20px 100px #15231520}dialog::backdrop{background:#1b2b2359;backdrop-filter:blur(3px)}dialog h2{font-size:24px;margin:8px 0 9px}.muted{color:var(--muted);font-size:12px}.dialog-close{position:absolute;right:15px;top:15px;font-size:23px}.routine{list-style:none;padding:0;margin:24px 0}.routine li{display:flex;gap:18px;margin-top:18px}.routine li>span{font-size:24px;line-height:1.1;color:#688752;width:40px;flex-shrink:0}.routine small{display:block;font-size:8px;letter-spacing:1px;margin-top:4px;color:#a1ac92}.routine b{font-size:12px;font-weight:600}.routine p{font-size:11px;color:var(--muted);margin-top:4px}.guide-foot{font-size:11px;color:#88957b;background:#f1f5e9;padding:14px;border-radius:8px} .visually-hidden{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
@media(min-width:1550px){.sidebar{width:252px;padding-left:30px;padding-right:30px}.workspace{margin-left:252px}main{padding-top:43px}.day-card{min-height:148px}.day-card h4{font-size:13px}.hero{min-height:224px}.hero h2{font-size:30px}.course-header{margin-top:40px}.week-section{margin-top:27px}}
@media(max-width:1190px){.sidebar{width:207px;padding:30px 17px}.workspace{margin-left:207px}.topbar{padding:0 28px}main{padding:30px 28px}.page-footer{padding-left:28px;padding-right:28px}.hero{padding:24px;gap:12px}.hero h2{font-size:23px}.progress-ring{width:102px;height:102px}.progress-ring strong{font-size:28px}.hero-grid{grid-template-columns:1.4fr 1fr}.continue-card{padding:23px}.week-cards{gap:7px}.day-card-link{padding:12px 9px 39px}.day-card h4{font-size:11px}.card-bottom{left:9px;right:9px}.card-day{font-size:8px}.review-tag{right:8px;top:12px;font-size:7px}.lesson-layout{grid-template-columns:minmax(0,1fr) 220px;gap:17px}.tabs{gap:18px;padding:0 19px}.lesson-content{padding:19px}.phrase{padding:14px 11px;gap:9px}.phrase .en{font-size:15px}.stat{padding:0 17px}.course-controls{gap:8px}.search input{width:85px}}
@media(max-width:1000px){.sidebar{width:180px;padding:28px 15px}.brand{font-size:20px;gap:8px}.brand-icon{width:34px;height:39px}.brand small{font-size:9px}.workspace{margin-left:180px}.nav-link{padding:12px 9px;font-size:12px;gap:9px}.sidebar-note{margin-left:8px}.sidebar-note p{font-size:14px}.topbar-label{display:none}.hero-grid{grid-template-columns:1fr 1fr}.progress-ring{display:none}.hero h2{font-size:25px}.week-cards{grid-template-columns:repeat(4,minmax(0,1fr));gap:9px}.day-card{min-height:130px}.day-card h4{font-size:13px}.day-card-link{padding:14px 12px 39px}.card-bottom{left:12px;right:12px}.course-header{align-items:flex-start;flex-direction:column;gap:14px}.course-controls{justify-content:space-between;width:100%}.search input{width:140px}.week-header .week-desc{display:none}.lesson-layout{grid-template-columns:1fr}.lesson-aside{display:grid;grid-template-columns:1fr 1fr}.lesson-title h1{font-size:29px}.lesson-title{align-items:flex-start}.complete-button{font-size:11px;padding:9px 12px}.lesson-end{padding:18px 19px}#toast{left:calc(50% + 90px)}}
@media(max-width:700px){.sidebar{position:relative;width:auto;border-right:0;border-bottom:1px solid var(--line);padding:19px 20px 12px;display:block}.brand{font-size:21px}.brand small{letter-spacing:1.5px}.brand-icon{width:37px;height:40px}.sidebar nav{display:flex;gap:4px;margin-top:20px}.nav-label,.sidebar-note,.sidebar-bottom{display:none}.nav-link{margin:0;justify-content:center;width:auto;flex:1;padding:9px 6px;font-size:11px;gap:6px}.nav-link .nav-count,.nav-link>span:last-child:not(:first-child){display:none}.nav-link svg{width:15px;height:15px}.workspace{margin:0}.topbar{height:44px;padding:0 21px;font-size:10px}.topbar-label{display:none}main{padding:25px 20px 30px}.page-heading{margin-bottom:21px;gap:15px}.page-heading h1{font-size:25px}.page-heading .text-button{font-size:10px}.eyebrow{font-size:9px}.subtitle{font-size:11px;line-height:1.8;max-width:245px}.hero-grid{grid-template-columns:1fr;gap:12px}.hero{min-height:183px;padding:24px}.hero h2{font-size:25px}.hero p{font-size:10px}.progress-ring{display:grid;width:104px;height:104px}.continue-card{padding:18px 21px;position:relative;min-height:143px}.continue-card h3{font-size:20px;margin-top:8px}.continue-card p{padding-right:36px}.continue-link{position:absolute;right:20px;bottom:20px}.continue-link>span:first-child{display:none}.stats{margin-top:15px;padding:15px 0}.stat{padding:0 12px;gap:0}.stat-icon{display:none}.stat strong{font-size:20px}.stat strong small{margin-left:4px;font-size:9px}.stat p{font-size:9px}.course-header{margin-top:28px}.course-header h2{font-size:17px}.course-header h2 small{font-size:10px}.course-controls{gap:7px}.filters button{padding:5px 8px;font-size:10px}.search{padding:7px}.search input{width:87px;font-size:10px}.week-header{gap:8px}.week-header h3{font-size:12px}.week-index{font-size:9px;padding:3px 5px}.week-cards{grid-template-columns:repeat(2,minmax(0,1fr));gap:9px}.day-card{min-height:121px}.day-card-link{padding:13px 14px 37px}.day-card h4{font-size:13px;line-height:1.5;margin-top:8px}.card-day{font-size:9px}.card-bottom{left:14px;right:13px}.review-tag{font-size:8px;top:13px;right:13px}.week-total{font-size:9px}.next-stage{padding:15px;gap:9px}.page-footer{padding:0 20px 22px;gap:10px;flex-direction:column;font-size:9px}.lesson-nav{margin-bottom:16px}.lesson-nav .text-button{font-size:10px}.lesson-arrows .outline-button{padding:7px 9px;font-size:10px}.lesson-arrows svg{width:13px;height:13px}.lesson-title{flex-direction:column;gap:16px}.lesson-title h1{font-size:29px}.lesson-title p{font-size:12px}.lesson-title .complete-button{width:100%;justify-content:center;padding:11px}.lesson-tags{margin:17px 0 21px;gap:13px;font-size:10px}.lesson-layout{gap:15px}.tabs{gap:0;padding:0 12px;justify-content:space-between}.tabs button{font-size:11px;padding:17px 3px 14px}.lesson-content{padding:17px 13px}.content-toolbar h2{font-size:13px}.content-toolbar p{font-size:9px}.translate-toggle{font-size:9px}.phrase{padding:14px 10px;gap:9px}.phrase .en{font-size:15px;line-height:1.75}.phrase-number{min-width:20px;height:20px;font-size:8px}.icon-button{width:28px;height:28px}.phrase .icon-button{width:24px;height:27px}.phrase .icon-button svg{width:14px;height:14px}.zh{font-size:11px}.lesson-aside{grid-template-columns:1fr}.aside-box{padding:19px}.mini-routine{gap:10px}.lesson-end{padding:15px 13px;gap:10px;align-items:flex-start;flex-direction:column}.lesson-end .primary-button{width:100%}.dialogue-line{max-width:100%}.dialogue-line .avatar{width:25px;height:25px}.bubble{padding:13px}.bubble .en{font-size:13px}.challenge-card{padding:17px}.challenge-card p{font-size:12px}.note-box textarea{min-height:130px}#toast{left:50%;bottom:18px;width:max-content;font-size:11px}dialog{padding:30px 23px}dialog h2{font-size:21px}.empty-state{padding:35px 20px}}
@media(max-width:700px){.page-heading{display:block}.page-heading h1{font-size:24px}.page-heading>.text-button{display:none}.page-heading .subtitle{max-width:100%}.hero{display:block;min-height:230px}.hero h2{font-size:23px}.hero .eyebrow{font-size:8px}.hero p{max-width:calc(100% - 80px);margin-top:18px}.hero .progress-ring{position:absolute;right:20px;bottom:24px;width:78px;height:78px;padding:4px}.hero .progress-ring strong{font-size:23px}.hero .progress-ring strong small{font-size:11px}.hero .progress-ring span{font-size:8px;margin-top:6px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}