@charset "UTF-8";
:root{--bg:#f7f5ef;--paper:#fffefa;--ink:#243c35;--muted:#6e786f;--line:#dfdfd3;--green:#214c42;--soft:#e8ede3;--coral:#ce604b;--sand:#e9dfc9;--shadow:0 20px 65px #233c3510}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.7 "Segoe UI","Microsoft YaHei",Arial,sans-serif}button,input,select,textarea{font:inherit}button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}button{cursor:pointer}a{color:inherit;text-decoration:none}button{color:inherit}button:disabled{opacity:.5;cursor:not-allowed}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid var(--coral);outline-offset:4px}h1,h2,h3,h4,p{margin:0}h1,h2,h3,h4{line-height:1.3}button{border:0}::selection{background:#e7cfb3}.skip{position:fixed;top:-100px;left:10px;background:var(--green);color:white;z-index:99;padding:12px}.skip:focus{top:10px}.sidebar{position:fixed;inset:0 auto 0 0;width:238px;padding:31px 24px 20px;background:#f0f0e7;border-right:1px solid var(--line);display:flex;flex-direction:column;z-index:20;overflow:auto}.brand{display:flex;gap:12px;align-items:center;font-size:14px;letter-spacing:2.8px;line-height:1.45}.brand b{font-weight:400}.brand-mark{font:56px/.9 Georgia,serif;letter-spacing:-7px;color:var(--green)}.brand-mark span{color:var(--coral)}.rail-label{font-size:11px;color:var(--muted);letter-spacing:1.5px;margin:17px 0 34px 4px}nav{display:grid;gap:6px}nav a{display:flex;gap:13px;align-items:center;border-radius:8px;padding:11px 14px;color:#67736a;font-size:14px}nav a svg{width:19px;height:19px;stroke:currentColor;fill:none;stroke-width:1.6}nav a:hover{background:#e7e8de}nav a.active{background:var(--green);color:#fff}.rail-bottom{margin-top:auto;padding-top:40px}.rail-book{padding:20px 18px;background:#e3e8dc;border-radius:7px;margin-bottom:20px;position:relative}.rail-book strong{display:block;font-size:17px;line-height:1.8;font-weight:500;margin:9px 0 16px}.eyebrow{font-size:10px;letter-spacing:2px;font-weight:600}.mini-meter{height:4px;border-radius:10px;background:#ccd6c5;overflow:hidden}.mini-meter i{display:block;height:100%;background:var(--green);width:0;transition:width .4s}.rail-book small{font-size:10px;display:block;margin-top:7px;color:#64715e}.plain{display:block;background:none;padding:5px 6px;font-size:12px;color:#647164}.local-note{font-size:10px;line-height:1.8;margin:9px 6px 0;color:#82877b}.workspace{margin-left:238px}.topbar{height:87px;padding:0 45px;display:flex;align-items:center;gap:22px;border-bottom:1px solid var(--line)}.breadcrumb{font-size:12px;color:#758073;flex:1}.breadcrumb span{margin:0 13px;color:#b0b4a5}.search-button{border:1px solid var(--line);border-radius:7px;background:#fffefa;padding:8px 12px;color:#8c9185;font-size:12px;display:flex;align-items:center;gap:12px}.search-button span{font-size:21px;line-height:1}.search-button kbd{font:11px Georgia;background:#f2f2ec;padding:0 6px;border:1px solid #e4e5dc;border-radius:3px;margin-left:22px}.profile{width:31px;height:31px;display:grid;place-items:center;background:#dfdfce;border-radius:50%;font-size:12px}.mobile-menu{display:none}main{max-width:1450px;margin:auto;padding:34px 45px 50px;min-height:calc(100vh - 150px)}.page-top{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:22px}.page-top h1{font-size:28px;font-weight:600;letter-spacing:-.7px}.page-top .en{font:italic 16px Georgia;color:#899180;margin-left:12px}.subtle{color:var(--muted);font-size:13px}.date{font-size:11px;letter-spacing:1px;color:#848a7c}.hero{display:grid;grid-template-columns:1.15fr .85fr;min-height:290px;background:#e9eddf;border:1px solid #dce1d0;border-radius:12px;overflow:hidden;position:relative}.hero-text{padding:35px 39px;position:relative;z-index:1}.hero .eyebrow{color:#73816c}.hero h2{font:56px/1.03 Georgia,serif;letter-spacing:-2px;margin:16px 0 17px}.hero h2 em{color:var(--coral);font-weight:400}.hero p{font-size:13px;color:#68765f;max-width:370px;line-height:1.9}.hero-actions{display:flex;gap:13px;align-items:center;margin-top:23px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:12px;background:var(--green);color:#fff;padding:10px 18px;border-radius:6px;border:1px solid var(--green);font-size:13px;line-height:1.5;transition:transform .15s,background .15s}.btn:hover{background:#163d33;transform:translateY(-1px)}.btn.secondary{background:transparent;color:var(--ink);border-color:#b8c1ad}.btn.light{background:var(--paper);color:var(--ink);border-color:var(--line)}.btn.coral{background:var(--coral);border-color:var(--coral)}.text-link{color:#516b53;font-size:12px;display:inline-flex;gap:12px;align-items:center}.hero-art{position:relative;display:grid;place-items:center;min-height:290px;isolation:isolate}.hero-art:before{content:"";width:310px;height:310px;border:1px solid #b9c3a8;border-radius:50%;position:absolute;top:32px;right:-25px}.hero-art:after{content:"";width:235px;height:235px;border:1px solid #c7ceb9;border-radius:50%;position:absolute;top:69px;right:12px}.book-object{position:absolute;width:184px;height:225px;background:#295145;border-radius:3px 10px 10px 3px;transform:rotate(-11deg);box-shadow:16px 20px 28px #233c3525,inset 8px 0 0 #183f35;z-index:1;right:95px;top:43px;padding:26px 24px;color:#f4eedc}.book-object:after{content:"";position:absolute;top:7px;bottom:7px;right:-6px;width:7px;background:repeating-linear-gradient(to bottom,#e6dec9 0px,#e6dec9 1px,#f6f0df 1px,#f6f0df 3px);border-radius:0 3px 3px 0;z-index:-1}.book-object small{font-size:8px;letter-spacing:2.5px}.book-object strong{display:block;font:33px/1.1 Georgia;margin-top:16px;letter-spacing:-1px}.book-object .book-line{height:1px;background:#8ca181;margin:18px 0}.book-object .book-level{font-size:13px;letter-spacing:4px}.floating-note{position:absolute;right:34px;bottom:34px;background:#fffdf4;box-shadow:0 7px 15px #354d3315;transform:rotate(9deg);padding:13px 19px;z-index:2;width:145px}.floating-note strong{font:italic 19px Georgia;display:block}.floating-note span{font-size:10px;color:#7b806a}.art-star{position:absolute;left:25px;top:34px;color:var(--coral);font-size:39px;font-weight:200}.stat-row{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:20px 0 31px}.stat{padding:17px 21px;border:1px solid var(--line);border-radius:8px;background:#fffefa99;display:flex;justify-content:space-between;align-items:center}.stat .value{font:30px Georgia;letter-spacing:-1px}.stat .label{font-size:11px;color:#7b8374;margin-top:2px}.stat .symbol{font-size:18px;color:#b2b7a2}.section-heading{display:flex;justify-content:space-between;align-items:center;gap:14px;margin-bottom:17px}.section-heading h2{font-size:18px;font-weight:600}.section-heading h2 small{font-size:11px;margin-left:10px;color:var(--muted);font-weight:400}.home-grid{display:grid;grid-template-columns:1fr 295px;gap:25px}.continue-card{display:flex;gap:21px;padding:22px;background:var(--paper);border:1px solid var(--line);border-radius:10px}.lesson-cover{width:91px;min-width:91px;background:#e9dfc9;border-radius:6px;padding:15px 12px;display:flex;flex-direction:column;justify-content:space-between;min-height:128px;position:relative;overflow:hidden}.lesson-cover.a2{background:#dbe6e0}.lesson-cover .no{font:44px Georgia;z-index:1}.lesson-cover small{font-size:9px;letter-spacing:1.5px}.lesson-cover:after{content:"";width:80px;height:80px;border:1px solid #bdbaa0;border-radius:50%;position:absolute;bottom:-28px;right:-35px}.continue-info{flex:1;min-width:0}.tag{display:inline-block;font-size:10px;letter-spacing:.6px;padding:2px 7px;border:1px solid #d9dfcf;border-radius:4px;color:#6d7c62;background:#f5f7ed}.tag.a2{color:#3c7565;background:#eef5f0;border-color:#d4e3db}.tag.orange{color:#a26743;background:#faf0df;border-color:#ebd9bd}.continue-info h3{font:25px Georgia;margin:7px 0 3px}.continue-info p{font-size:12px;color:var(--muted)}.continue-bottom{display:flex;gap:15px;align-items:center;justify-content:space-between;margin-top:17px}.continue-bottom small{font-size:10px;color:var(--muted)}.practice-card{background:#efe6d5;border:1px solid #e4d9c2;border-radius:10px;padding:24px}.practice-card h3{font-size:17px;margin:13px 0 7px}.practice-card p{font-size:12px;color:#8a7a62;line-height:1.9}.practice-card .btn{width:100%;margin-top:22px}.practice-illustration{height:52px;position:relative;margin-top:19px}.tiny-card{position:absolute;border:1px solid #cfc3aa;border-radius:5px;width:94px;height:55px;background:#fffaf0;display:grid;place-items:center;font:18px Georgia;transform:rotate(-8deg);left:28px}.tiny-card+div{left:88px;transform:rotate(8deg);background:#d9e0ca}.path-strip{display:flex;gap:0;margin:22px 0 3px;align-items:center}.path-step{display:flex;align-items:center;gap:9px;font-size:10px;color:#7c8472;flex:1}.path-step i{font-style:normal;width:24px;height:24px;border-radius:50%;display:grid;place-items:center;border:1px solid #cbd2c0;font-size:10px}.path-step:after{content:"";flex:1;height:1px;background:var(--line);margin:0 10px}.path-step:last-child:after{display:none}.path-step:first-child i{background:var(--green);color:white;border-color:var(--green)}.catalogue{margin-top:32px}.filters{display:flex;align-items:center;gap:7px;flex-wrap:wrap}.filter{background:transparent;border:1px solid transparent;border-radius:5px;padding:5px 14px;font-size:12px;color:#788171}.filter.active{background:var(--green);color:white;border-color:var(--green)}.filter:hover{border-color:#afbaa4}.courses{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:15px}.course-card{background:var(--paper);border:1px solid var(--line);border-radius:9px;padding:21px;display:flex;flex-direction:column;transition:transform .18s,box-shadow .18s;min-height:220px}.course-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#c1cbb6}.card-top{display:flex;justify-content:space-between;align-items:center}.card-top .index{font:15px Georgia;color:#9ba28d}.course-card h3{font:23px/1.15 Georgia;margin:17px 0 6px;letter-spacing:-.5px}.course-card .chinese{font-size:12px;color:#7b8371}.course-card .topics{margin-top:12px;font-size:11px;color:#8a8f81;line-height:1.8;flex:1}.card-footer{display:flex;justify-content:space-between;border-top:1px solid #ecece3;margin-top:17px;padding-top:12px;font-size:10px;color:#89907c}.card-arrow{font-size:17px;line-height:1;color:var(--green)}.pill{font-size:10px;background:#edf0e6;padding:3px 7px;border-radius:10px;color:#637954}.course-card.review{background:#f0f0e7}.toolbar{display:flex;gap:13px;align-items:center;flex-wrap:wrap;margin:24px 0}.input{border:1px solid var(--line);border-radius:7px;padding:11px 14px;background:var(--paper);color:var(--ink);min-width:0}.toolbar .input{flex:1}.toolbar select{flex:0 1 150px}.back{font-size:12px;color:#7a866e;display:inline-flex;gap:9px;align-items:center;margin-bottom:20px}.lesson-banner{padding:29px 33px;border:1px solid #d8e0cd;border-radius:11px;background:#e8eddf;display:flex;justify-content:space-between;align-items:center;gap:20px}.lesson-banner h1{font:44px/1.12 Georgia;margin:11px 0 8px;letter-spacing:-1px}.lesson-banner h1+div{font-size:14px;color:#66775c}.lesson-banner .big-number{font:94px/1 Georgia;color:#becbb0}.lesson-meta{font-size:11px;color:#7d8b73;margin-top:12px}.lesson-tabs{display:flex;gap:27px;overflow-x:auto;border-bottom:1px solid var(--line);margin:18px 0 27px;position:sticky;top:0;background:var(--bg);z-index:5;padding:5px 0 0;scrollbar-width:thin}.lesson-tabs button{background:none;white-space:nowrap;padding:12px 0;color:#7b8573;font-size:12px;border-bottom:2px solid transparent}.lesson-tabs button.active{border-bottom-color:var(--green);color:var(--green);font-weight:600}.lesson-layout{display:grid;grid-template-columns:minmax(0,1fr) 235px;gap:26px}.panel{background:var(--paper);border:1px solid var(--line);border-radius:9px;padding:26px;margin-bottom:18px}.panel h2{font-size:19px;margin-bottom:16px}.panel h3{font-size:16px;margin-bottom:11px}.panel p{font-size:14px;line-height:2;color:#53634f}.panel .explanation{white-space:pre-line}.goals{list-style:none;padding:0;margin:0;display:grid;gap:11px}.goals li{display:flex;gap:10px;font-size:13px}.goals li:before{content:"✓";color:var(--green);width:21px;height:21px;border-radius:50%;background:#edf2e7;text-align:center;flex-shrink:0}.study-aside{align-self:start;position:sticky;top:72px}.study-aside h3{font-size:13px;margin:0 0 14px}.check-row{display:flex;gap:9px;align-items:flex-start;font-size:12px;cursor:pointer;margin:13px 0;color:#627157}.check-row input{accent-color:var(--green);margin-top:5px}.aside-box{border:1px solid var(--line);padding:20px;border-radius:8px;margin-bottom:17px}.aside-box p{font-size:11px;color:#7a8570}.aside-box .btn{width:100%;margin-top:14px}.source-line{font-size:10px!important;color:#919883!important;margin-top:10px;line-height:1.6!important}.example{background:#f3f5ed;border-left:2px solid #90a87b;padding:14px 16px;margin:14px 0;border-radius:0 5px 5px 0}.example .de{font:19px/1.6 Georgia,serif;letter-spacing:.1px}.example .translation{font-size:12px;color:#819075;margin-top:3px}.speak{background:none;color:#859577;padding:3px 6px;font-size:15px}.tip{background:#f6efdf;color:#8a7250;font-size:12px;padding:12px 14px;border-radius:5px;margin-top:16px}.vocab-list{display:grid;gap:10px}.vocab-item{display:grid;grid-template-columns:1fr 1fr auto;gap:16px;background:var(--paper);border:1px solid var(--line);padding:17px 20px;border-radius:8px;align-items:center}.vocab-item .de{font:21px/1.4 Georgia}.vocab-item .form{font-size:11px;color:#929982;margin-top:5px}.vocab-item .meaning{font-size:13px;color:#5f7056}.vocab-item .word-example{font-size:12px;color:#829075;margin-top:4px}.word-tools{display:flex;align-items:center;gap:6px}.save-word{border:1px solid var(--line);background:none;border-radius:5px;color:#8b967d;padding:3px 9px}.save-word.saved{background:#f5e8cc;color:#b88633;border-color:#e4d1a9}.task{counter-increment:task}.task h3:before{content:counter(task,decimal-leading-zero);font:18px Georgia;color:#b4bba6;margin-right:14px}.task-check{font-size:12px;background:#f1f4e9;padding:12px 15px;margin-top:15px;border-radius:5px}.task textarea{display:block;width:100%;min-height:100px;resize:vertical;margin-top:15px;background:#fafaf5;font-size:13px}.task label{font-size:11px;color:#8a947e}.note-callout{background:#eeeede;border:1px solid #dedfc9;padding:16px 19px;font-size:12px;color:#738166;border-radius:7px;margin-bottom:20px;line-height:1.9}.word-total{font:52px Georgia;letter-spacing:-2px}.review-hero{background:var(--green);color:#fffdf1;padding:35px;border-radius:10px;display:flex;align-items:center;gap:40px;margin-bottom:25px}.review-hero h2{font:34px Georgia;margin-bottom:10px}.review-hero p{color:#bbccba;font-size:13px;max-width:500px}.review-hero .btn{background:#f4eddb;color:var(--green);margin-top:20px}.review-hero .review-count{margin-left:auto;text-align:center;min-width:100px}.review-count small{display:block;font-size:11px;color:#bbccba}.empty{padding:45px;text-align:center;color:#7e8b71;background:#eff1e6;border:1px dashed #c7d0b9;border-radius:9px;font-size:13px}.grammar-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:15px}.grammar-card{padding:25px;background:var(--paper);border:1px solid var(--line);border-radius:9px}.grammar-card h3{font-size:17px;margin:12px 0 9px}.grammar-card p{font-size:12px;color:#808c74}.grammar-card .text-link{margin-top:16px}.source-table{width:100%;border-collapse:collapse;font-size:12px}.source-table th{text-align:left;color:#87927b;font-weight:500;padding:11px;border-bottom:1px solid var(--line)}.source-table td{padding:13px 11px;border-bottom:1px solid #e7e9df;word-break:break-word}.source-table td:first-child{max-width:450px}.source-table a{color:#3e715c;text-decoration:underline;text-underline-offset:3px}.table-wrap{overflow:auto}.pagination{display:flex;justify-content:space-between;align-items:center;margin:23px 0;font-size:12px}.page-description{color:#76816b;font-size:13px;line-height:1.9;margin-top:10px;max-width:800px}.search-group{margin:28px 0}.search-group h2{font-size:16px;margin-bottom:13px}.search-item{display:block;padding:15px 18px;background:var(--paper);border:1px solid var(--line);border-radius:7px;margin:8px 0}.search-item strong{font-size:14px;font-weight:500}.search-item p{font-size:12px;color:#89937f;margin-top:5px}.reading-item{display:block;border-bottom:1px solid var(--line);padding:15px 0}.reading-item:last-child{border:0}.reading-item strong{font-size:13px}.reading-item small{font-size:11px;color:#939b88;float:right}.reading-item p{font-size:12px;color:#7c8a6f;margin-top:6px}.source-links{display:grid;gap:7px;margin-top:13px}.source-links a{font-size:11px;color:#748568;overflow-wrap:anywhere;text-decoration:underline;text-underline-offset:3px}.mistake-count{background:#f5e6d8;color:#a46a48;padding:2px 7px;border-radius:8px;font-size:10px}.level-heading{display:flex;align-items:baseline;gap:13px;margin:30px 0 18px}.level-heading h2{font:30px Georgia}.level-heading span{font-size:12px;color:#89917b}.next-prev{display:flex;justify-content:space-between;margin-top:24px;gap:12px}footer{font-size:10px;color:#a0a592;text-align:center;padding:10px 25px 25px;letter-spacing:.5px}footer span{margin:0 12px}.loading{padding:80px;text-align:center;color:var(--muted)}#toast{position:fixed;bottom:30px;left:calc(50% + 100px);transform:translateX(-50%);background:var(--green);color:white;box-shadow:var(--shadow);border-radius:7px;padding:12px 20px;font-size:13px;z-index:100;opacity:0;pointer-events:none;transition:opacity .2s;max-width:85vw}#toast.show{opacity:1}dialog{border:1px solid #d7decd;background:var(--bg);color:var(--ink);padding:42px;width:min(570px,94vw);max-height:90vh;border-radius:15px;box-shadow:0 30px 120px #20382d44}dialog::backdrop{background:#1c332d88;backdrop-filter:blur(4px)}.dialog-close{position:absolute;right:16px;top:10px;background:none;font-size:26px;color:#8d9982}.flash-meta{font-size:11px;letter-spacing:1px;color:#849174;display:flex;justify-content:space-between}.flash-word{font:42px/1.3 Georgia;text-align:center;margin:45px 0 10px;overflow-wrap:anywhere}.flash-form{font-size:12px;text-align:center;color:#8b967c}.flash-answer{min-height:100px;text-align:center;padding:23px 0}.flash-answer .meaning{font-size:22px}.flash-answer p{font-size:13px;margin-top:10px;color:#839078}.flash-buttons{display:flex;gap:12px;justify-content:center;margin-top:20px}.flash-buttons .btn{flex:1}.quiz-options{display:grid;gap:9px;margin-top:27px}.quiz-options button{background:var(--paper);border:1px solid var(--line);border-radius:7px;padding:13px;text-align:left;font-size:13px}.quiz-options button:hover{border-color:var(--green)}.quiz-options button.correct{background:#dfebd7;border-color:#90b074}.quiz-options button.wrong{background:#f3d9cb;border-color:#d29876}.quiz-feedback{font-size:12px;color:#7d8a70;min-height:28px;margin:15px 0}.article{max-width:900px;font-size:14px;line-height:1.95}.article h1{font-size:27px;margin:15px 0}.article h2{font-size:22px;margin:26px 0 14px}.article h3{font-size:18px;margin:22px 0 10px}.article table{display:block;overflow:auto;border-collapse:collapse;font-size:12px;margin:15px 0}.article th,.article td{padding:8px 12px;border:1px solid var(--line);text-align:left}.article blockquote{margin:17px 0;border-left:3px solid #bfcca9;padding:8px 18px;background:#edf1e4}.article code{background:#eef0e8;padding:2px 4px;font-size:12px}.article pre{white-space:pre-wrap;background:#edf0e6;padding:15px}.article p{margin:10px 0}.progress-row{display:grid;grid-template-columns:50px 1fr auto;gap:14px;padding:17px 0;align-items:center;border-bottom:1px solid var(--line)}.progress-row strong{font-size:13px;font-weight:500}.progress-row small{font-size:10px;color:#8b967f}.progress-row .mini-meter{margin:8px 0}.progress-row .unit-num{font:24px Georgia;color:#b0b8a1}.session-results{text-align:center;padding:20px 0}.session-results h2{font:32px Georgia;margin:16px 0}.session-results p{color:#7c896f;font-size:13px;margin:12px 0}.active-search{width:100%;font-size:19px;padding:19px 22px}.tiny{font-size:11px;color:#8c9781}.no-results{padding:30px 0;color:#7f8d72;font-size:13px}.hidden{display:none!important}.bookmark{background:transparent;border:1px solid #bcc9ac;padding:7px 12px;border-radius:5px;font-size:12px;white-space:nowrap}.bookmark.saved{background:#f6e6c6}.usage-guide{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.usage-guide .panel{padding:20px}.usage-guide h3{font-size:14px}.usage-guide p{font-size:12px}details>summary{cursor:pointer;font-size:13px;color:#687b5b}details[open]>summary{margin-bottom:15px}.correction{border-left:3px solid var(--coral);background:#faf0e4;padding:14px 18px;margin:12px 0;font-size:12px;color:#917252}
@media(min-width:1600px){main{padding-top:43px}.hero{min-height:320px}.hero-text{padding:40px 44px}.hero h2{font-size:65px}.hero-art{min-height:320px}.book-object{top:50px;right:140px}.floating-note{right:65px;bottom:45px}.home-grid{grid-template-columns:1fr 340px}.courses{grid-template-columns:repeat(4,minmax(0,1fr))}}
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