:root{--font-cjk:"PingFang SC","Hiragino Sans GB","Heiti SC","Source Han Sans SC","Noto Sans CJK SC","Microsoft YaHei","WenQuanYi Micro Hei",sans-serif;--tone1:#A55A32;--tone2:#4A7836;--tone3:#3a5a8c;--tone4:#7a3f6d;--tone5:#8b7d67;--ok-bg:#eef3e6;--bad-bg:#fbeee6}.appbar{display:flex;flex-wrap:wrap;align-items:center;gap:14px 20px;border-bottom:2px solid var(--kiwi-brown);padding-bottom:14px;margin-bottom:22px}.appbar .navtoggle{display:none}@media (max-width:959px){.appbar .navtoggle{display:block;background:var(--kiwi-brown)}.appbar .navtoggle span{background:var(--cream)}}.apptabs{display:flex;flex-wrap:wrap;gap:6px}.apptab{font-family:var(--font-sans);font-size:.9rem;font-weight:600;background:0 0;color:var(--muted);cursor:pointer;border:1px solid transparent;border-radius:8px;padding:7px 14px}.apptab:hover{background:var(--subsoil);color:var(--kiwi-brown)}.apptab.is-active{background:var(--kiwi-brown);border-color:var(--brown-dark);color:var(--cream)}.scoreboard{display:flex;align-items:center;gap:12px;margin-left:auto}.ring{position:relative;width:46px;height:46px;flex-shrink:0}.ring svg{transform:rotate(-90deg)}.ring circle{fill:none;stroke-width:4}.ring .ring-bg{stroke:var(--rule)}.ring .ring-fg{stroke:var(--leaf-green);stroke-linecap:round;stroke-dasharray:113;stroke-dashoffset:113;transition:stroke-dashoffset .4s}.ring span{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-family:var(--font-sans);font-size:.7rem;font-weight:700;color:var(--kiwi-brown)}.counts{font-family:var(--font-sans);font-size:.82rem;color:var(--muted);line-height:1.35}.counts strong{font-size:1.1rem;color:var(--kiwi-brown)}.counts em{display:block;font-size:.72rem;font-style:normal;color:var(--muted)}.view{display:none}.view.is-active{display:block}.panel{background:#fff;border:1px solid var(--rule);border-radius:12px;padding:22px 24px;margin:0 0 22px}.panel>h2{margin:0 0 10px;font-size:1.3rem;color:var(--kiwi-brown)}.panel>h3{margin:22px 0 8px;font-size:1.08rem;color:var(--kiwi-brown)}.panel.tinted{background:var(--subsoil)}.note{font-family:var(--font-sans);font-size:.88rem;color:var(--muted);line-height:1.5}.note code{font-size:.85em}.btn{font-family:var(--font-sans);font-size:.9rem;font-weight:600;background:#fff;color:var(--kiwi-brown);cursor:pointer;border:1px solid var(--rule);border-radius:8px;padding:9px 18px;transition:background .12s,border-color .12s,color .12s}.btn:hover{border-color:var(--leaf-green);color:var(--green-dark)}.btn:disabled{opacity:.45;cursor:not-allowed}.btn:disabled:hover{border-color:var(--rule);color:var(--kiwi-brown)}.btn.primary{background:var(--leaf-green);border-color:var(--green-dark);color:#fff}.btn.primary:hover{background:var(--green-dark);color:#fff}.btn.small{font-size:.8rem;padding:6px 12px}.btn.danger{color:var(--clay-rust)}.btn.danger:hover{border-color:var(--clay-rust);color:var(--clay-rust)}.btn.file{display:inline-block}.btnrow{display:flex;flex-wrap:wrap;gap:10px;margin:16px 0 4px}.btnrow.end{justify-content:flex-end}.pillrow{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 12px;align-items:center}.pill{display:inline-block;font-family:var(--font-sans);font-size:.7rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;padding:3px 10px;border-radius:20px;background:var(--subsoil);color:var(--kiwi-brown)}.pill.new{background:#e6efdd;color:var(--green-dark)}.pill.due{background:#f7e5dd;color:var(--clay-rust)}.pill.topic-core{background:#ede0c8;color:#63452b}.pill.topic-soil{background:#e7ddd0;color:#6b4a2a}.pill.topic-plant{background:#e2eddb;color:#3a6029}.pill.topic-life{background:#e6e9f2;color:#3a5a8c}.pill.topic-academic{background:#f0e6ef;color:#7a3f6d}.zh{font-family:var(--font-cjk);line-height:1.5}.zh.big{font-size:2.4rem;line-height:1.35;letter-spacing:.02em}.zh.mid{font-size:1.55rem}.zh.sm{font-size:1.12rem}.pinyin{font-family:var(--font-sans);color:var(--muted);font-size:.95rem;letter-spacing:.01em}.pinyin.big{font-size:1.1rem}.gloss{font-size:1rem;color:var(--humus)}.hz{cursor:pointer;border-radius:3px;padding:0 1px}.hz:hover{background:#f2ead6}.hz:active{background:#e9dcbb}.hz.is-open{background:#ffe97a}.hz.unknown{cursor:default}.hz.unknown:hover{background:0 0}.pyb{font-family:var(--font-sans);font-size:.82em;color:var(--muted);white-space:nowrap}.t1{color:var(--tone1)}.t2{color:var(--tone2)}.t3{color:var(--tone3)}.t4{color:var(--tone4)}.t5{color:var(--tone5)}body.no-tone-colour .t1,body.no-tone-colour .t2,body.no-tone-colour .t3,body.no-tone-colour .t4,body.no-tone-colour .t5{color:inherit}.ruby{display:inline-flex;flex-direction:column;align-items:center;vertical-align:baseline;margin:0 2px}.ruby .rb-p{font-family:var(--font-sans);font-size:.62em;line-height:1.2;color:var(--muted)}.ruby .rb-s{font-family:var(--font-cjk);line-height:1.25}body.hide-pinyin .pinyin.toggleable,body.hide-pinyin .ruby .rb-p{visibility:hidden}.speak{background:0 0;border:0;cursor:pointer;padding:2px 6px;border-radius:6px;color:var(--leaf-green);font-size:1rem;line-height:1;vertical-align:middle}.speak:hover{background:var(--subsoil)}.speak.big{font-size:1.4rem;padding:6px 10px}.speak[disabled]{opacity:.35;cursor:not-allowed}.speak[disabled]:hover{background:0 0}.dictpop{position:absolute;z-index:200;width:290px;max-width:calc(100vw - 24px);background:#fff;border:1px solid var(--kiwi-brown);border-radius:10px;box-shadow:0 10px 30px rgba(45,35,24,.24);padding:14px 16px 12px;font-family:var(--font-sans)}.dictpop[hidden]{display:none}.dictpop .dp-head{display:flex;align-items:flex-start;gap:10px}.dictpop .dp-hz{font-family:var(--font-cjk);font-size:1.9rem;line-height:1.15;color:var(--kiwi-brown)}.dictpop .dp-close{margin-left:auto;background:0 0;border:0;cursor:pointer;color:var(--muted);font-size:1.1rem;line-height:1;padding:2px 4px}.dictpop .dp-close:hover{color:var(--clay-rust)}.dictpop .dp-p{font-size:.95rem;margin:4px 0 2px}.dictpop .dp-e{font-size:.95rem;color:var(--humus);margin:6px 0 0;line-height:1.4}.dictpop .dp-pos{font-size:.72rem;text-transform:uppercase;letter-spacing:.06em;color:var(--muted)}.dictpop .dp-chars{margin:10px 0 0;padding:9px 0 0;border-top:1px solid var(--rule);font-size:.82rem;color:var(--muted)}.dictpop .dp-chars b{font-family:var(--font-cjk);font-size:1rem;color:var(--kiwi-brown);font-weight:400}.dictpop .dp-chars span{display:block;margin:3px 0}.dictpop .dp-foot{display:flex;gap:8px;margin-top:12px;align-items:center}.dictpop .dp-foot .btn{padding:5px 11px;font-size:.78rem}.dictpop .dp-said{font-size:.72rem;color:var(--green-dark)}.voicebar{background:#fbeee6;border-left:4px solid var(--clay-rust);border-radius:0 7px 7px 0;padding:12px 16px;margin:0 0 22px;font-family:var(--font-sans);font-size:.88rem;line-height:1.5}.voicebar[hidden]{display:none}.voicebar strong{color:var(--clay-rust)}.voicebar ol{margin:8px 0 0;padding-left:1.3em}.voicebar li{margin:3px 0}.unitgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:18px}.unitcard{background:#fff;border:1px solid var(--rule);border-radius:12px;padding:18px 20px 14px;display:flex;flex-direction:column}.unitcard.locked{opacity:.62}.unitcard h3{margin:0 0 2px;font-size:1.14rem;color:var(--kiwi-brown)}.unitcard .uzh{font-family:var(--font-cjk);font-size:1rem;color:var(--muted);margin:0 0 10px}.unitcard .ublurb{font-family:var(--font-sans);font-size:.85rem;color:var(--muted);margin:0 0 12px;line-height:1.45}.lessonlist{list-style:none;margin:0;padding:0}.lessonlist li{margin:0}.lessonrow{display:flex;align-items:center;gap:10px;width:100%;text-align:left;background:0 0;border:0;border-top:1px solid var(--rule);cursor:pointer;padding:9px 4px;font-family:var(--font-sans);font-size:.9rem;color:var(--humus)}.lessonrow:hover{background:#f8f2e2}.lessonrow .lnum{font-size:.72rem;font-weight:700;flex-shrink:0;width:1.9em;height:1.9em;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;background:var(--subsoil);color:var(--kiwi-brown)}.lessonrow.done .lnum{background:var(--leaf-green);color:#fff}.lessonrow.started .lnum{background:#e9d9b8;color:var(--kiwi-brown)}.lessonrow .ltitle{flex:1;line-height:1.3}.lessonrow .lzh{font-family:var(--font-cjk);color:var(--muted);font-size:.85rem}.lessonrow .lmeta{font-size:.72rem;color:var(--muted);flex-shrink:0}.progressbar{height:7px;border-radius:4px;background:var(--rule);overflow:hidden;margin:0 0 14px}.progressbar i{display:block;height:100%;background:var(--leaf-green);width:0;transition:width .35s}.lessonhead{display:flex;flex-wrap:wrap;align-items:baseline;gap:6px 14px;margin:0 0 6px}.lessonhead h2{margin:0;font-size:1.5rem;color:var(--kiwi-brown)}.lessonhead .lh-zh{font-family:var(--font-cjk);font-size:1.15rem;color:var(--muted)}.lessonhead .backmap{margin-left:auto}.stepbar{display:flex;align-items:center;gap:8px;margin:14px 0 20px;font-family:var(--font-sans)}.stepdots{display:flex;gap:4px;flex-wrap:wrap;flex:1}.stepdot{width:9px;height:9px;border-radius:50%;background:var(--rule)}.stepdot.done{background:var(--leaf-green)}.stepdot.now{background:var(--kiwi-brown);box-shadow:0 0 0 3px rgba(99,69,43,.16)}.stepdot.wrong{background:var(--clay-rust)}.stepcount{font-size:.78rem;color:var(--muted);white-space:nowrap}.vocabgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:12px;margin:14px 0 4px}.wordcard{border:1px solid var(--rule);border-radius:10px;padding:12px 14px;background:#fff;display:flex;flex-direction:column;gap:2px}.wordcard .wc-top{display:flex;align-items:center;gap:6px}.wordcard .wc-hz{font-family:var(--font-cjk);font-size:1.5rem;color:var(--kiwi-brown);line-height:1.25}.wordcard .wc-p{font-family:var(--font-sans);font-size:.88rem}.wordcard .wc-e{font-size:.92rem;color:var(--humus);line-height:1.35}.wordcard .speak{margin-left:auto}.dialogue{margin:12px 0 4px}.turn{display:flex;gap:12px;padding:12px 0;border-top:1px solid var(--rule)}.turn:first-child{border-top:0}.turn .sp{flex-shrink:0;width:30px;height:30px;border-radius:50%;background:var(--subsoil);color:var(--kiwi-brown);font-family:var(--font-sans);font-size:.78rem;font-weight:700;display:flex;align-items:center;justify-content:center}.turn.b .sp{background:var(--leaf-green);color:#fff}.turn .tbody{flex:1;min-width:0}.turn .t-zh{font-family:var(--font-cjk);font-size:1.28rem;line-height:1.5}.turn .t-p{font-family:var(--font-sans);font-size:.86rem;color:var(--muted);margin:2px 0 0}.turn .t-e{font-size:.94rem;color:var(--muted);margin:3px 0 0;font-style:italic}body.hide-english .turn .t-e{display:none}.qstem{margin:0 0 4px;font-family:var(--font-sans);font-size:.82rem;text-transform:uppercase;letter-spacing:.08em;color:var(--leaf-green);font-weight:700}.qprompt{font-size:1.25rem;line-height:1.45;margin:0 0 4px}.qprompt .zh{font-size:1.9rem}.qsub{font-family:var(--font-sans);font-size:.9rem;color:var(--muted);margin:2px 0 0}.choices{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:10px;margin:18px 0 0}.choice{text-align:left;background:#fff;border:1px solid var(--rule);border-radius:10px;padding:13px 16px;cursor:pointer;font-family:inherit;font-size:1rem;color:var(--humus);transition:border-color .12s,background .12s}.choice:hover:not(:disabled){border-color:var(--leaf-green);background:#f8f2e2}.choice .c-zh{font-family:var(--font-cjk);font-size:1.4rem;display:block;line-height:1.35}.choice .c-p{font-family:var(--font-sans);font-size:.82rem;color:var(--muted);display:block}.choice .ckey{display:inline-block;font-family:var(--font-sans);font-size:.68rem;font-weight:700;color:var(--muted);background:var(--subsoil);border:1px solid var(--rule);border-radius:4px;padding:1px 6px;margin-right:9px;vertical-align:middle}.choice.correct{border-color:var(--leaf-green);background:var(--ok-bg)}.choice.wrong{border-color:var(--clay-rust);background:var(--bad-bg)}.choice:disabled{cursor:default}.buildline{min-height:64px;border:2px dashed var(--rule);border-radius:10px;padding:10px 12px;margin:16px 0 12px;display:flex;flex-wrap:wrap;gap:8px;align-items:flex-start;background:#fffdf6}.buildline.filled{border-style:solid}.tilebank{display:flex;flex-wrap:wrap;gap:8px}.tile{font-family:var(--font-cjk);font-size:1.25rem;line-height:1.3;background:#fff;border:1px solid var(--rule);border-radius:8px;padding:7px 13px;cursor:pointer;color:var(--humus)}.tile:hover{border-color:var(--leaf-green);background:#f8f2e2}.tile .tp{display:block;font-family:var(--font-sans);font-size:.62rem;color:var(--muted);text-align:center}.tile.used{visibility:hidden}.tile:disabled{cursor:default}.answerbar{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin:16px 0 0}.answerbar input[type=text]{flex:1;min-width:200px;font-family:var(--font-sans);font-size:1.05rem;padding:10px 13px;border:1px solid var(--rule);border-radius:8px;background:#fff;color:var(--humus)}.answerbar input[type=text]:focus{outline:2px solid var(--leaf-green);outline-offset:1px}.matchgrid{display:grid;grid-template-columns:1fr 1fr;gap:10px 18px;margin:16px 0 0}.matchcol{display:flex;flex-direction:column;gap:8px}.matchbtn{text-align:left;background:#fff;border:1px solid var(--rule);border-radius:9px;padding:10px 13px;cursor:pointer;font-family:inherit;font-size:.98rem;color:var(--humus)}.matchbtn .m-zh{font-family:var(--font-cjk);font-size:1.25rem}.matchbtn .m-p{font-family:var(--font-sans);font-size:.78rem;color:var(--muted);display:block}.matchbtn:hover:not(:disabled){border-color:var(--leaf-green)}.matchbtn.sel{border-color:var(--kiwi-brown);background:var(--subsoil)}.matchbtn.paired{border-color:var(--leaf-green);background:var(--ok-bg);opacity:.6;cursor:default}.matchbtn.missed{border-color:var(--clay-rust);background:var(--bad-bg)}.sayrow{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin:18px 0 0}.feedback{margin:18px 0 0;padding:13px 16px;border-radius:0 8px 8px 0;font-family:var(--font-sans);font-size:.94rem;line-height:1.5}.feedback[hidden]{display:none}.feedback.ok{background:var(--ok-bg);border-left:4px solid var(--leaf-green)}.feedback.bad{background:var(--bad-bg);border-left:4px solid var(--clay-rust)}.feedback .fb-head{font-weight:700;color:var(--kiwi-brown)}.feedback .fb-ans{font-family:var(--font-cjk);font-size:1.15rem}.notebox{margin:14px 0 0;padding:13px 16px;border-radius:0 8px 8px 0;font-family:var(--font-sans);font-size:.9rem;line-height:1.55}.notebox h4{margin:0 0 5px;font-size:.72rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase}.notebox p{margin:6px 0}.notebox p:last-child{margin-bottom:0}.notebox ul{margin:6px 0;padding-left:1.25em}.notebox.grammar{background:#e9eef5;border-left:4px solid #3a5a8c}.notebox.grammar h4{color:#3a5a8c}.notebox.culture{background:#f3ece2;border-left:4px solid var(--kiwi-brown)}.notebox.culture h4{color:var(--kiwi-brown)}.notebox .zh{font-size:1.05em}.donecard{text-align:center;padding:34px 24px}.donecard .big{font-family:var(--font-cjk);font-size:2.6rem;color:var(--leaf-green);margin:0 0 6px}.donecard h2{margin:0 0 8px}.donescore{font-family:var(--font-sans);color:var(--muted);margin:0 0 18px}.filterbar{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin:0 0 16px}.filterbar input[type=search]{flex:1;min-width:220px;font-family:var(--font-sans);font-size:.95rem;padding:9px 13px;border:1px solid var(--rule);border-radius:8px;background:#fff;color:var(--humus)}.filterbar select{font-family:var(--font-sans);font-size:.9rem;padding:8px 11px;border:1px solid var(--rule);border-radius:8px;background:#fff;color:var(--humus)}.filterbar .count{font-family:var(--font-sans);font-size:.82rem;color:var(--muted)}.check{font-family:var(--font-sans);font-size:.85rem;color:var(--muted);display:inline-flex;align-items:center;gap:6px;cursor:pointer}.vocabtable{width:100%;border-collapse:collapse;font-size:.95rem;background:#fff}.vocabtable th{background:var(--subsoil);color:var(--kiwi-brown);font-family:var(--font-sans);font-size:.8rem;text-transform:uppercase;letter-spacing:.05em;position:sticky;top:0}.vocabtable td,.vocabtable th{border:1px solid var(--rule);padding:7px 11px;text-align:left;vertical-align:top}.vocabtable td.c-hz{font-family:var(--font-cjk);font-size:1.3rem;white-space:nowrap}.vocabtable td.c-p{font-family:var(--font-sans);font-size:.88rem;white-space:nowrap}.vocabtable td.c-x{width:1%;white-space:nowrap}.vocabtable tr:hover td{background:#fdf9ee}.tablescroll{max-height:62vh;overflow:auto;border:1px solid var(--rule);border-radius:10px}.morebar{text-align:center;padding:14px 0 2px}.flashcard{background:#fff;border:1px solid var(--rule);border-radius:14px;padding:40px 24px;text-align:center;min-height:250px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px}.flashcard .fc-hz{font-family:var(--font-cjk);font-size:3.4rem;line-height:1.2;color:var(--kiwi-brown)}.flashcard .fc-p{font-family:var(--font-sans);font-size:1.25rem}.flashcard .fc-e{font-size:1.15rem;color:var(--humus)}.flashcard .fc-hint{font-family:var(--font-sans);font-size:.82rem;color:var(--muted)}.gradebar{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:10px;margin:16px 0 0}.gradebar .btn{padding:12px 10px}.gradebar .btn small{display:block;font-weight:400;font-size:.7rem;color:var(--muted);margin-top:2px}.statgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:12px;margin:6px 0 0}.stattile{background:var(--subsoil);border-radius:10px;padding:14px 16px}.stattile .sv{font-family:var(--font-sans);font-size:1.7rem;font-weight:700;color:var(--kiwi-brown);line-height:1.1}.stattile .sl{font-family:var(--font-sans);font-size:.78rem;color:var(--muted)}.tierbars{margin:10px 0 0}.tierbar{display:flex;align-items:center;gap:10px;margin:7px 0;font-family:var(--font-sans);font-size:.84rem}.tierbar .tb-name{width:150px;flex-shrink:0;color:var(--kiwi-brown)}.tierbar .tb-track{flex:1;height:9px;background:var(--rule);border-radius:5px;overflow:hidden}.tierbar .tb-track i{display:block;height:100%;background:var(--leaf-green);width:0}.tierbar .tb-n{width:96px;text-align:right;color:var(--muted);flex-shrink:0}.content .exline{margin:12px 0;padding-left:14px;border-left:3px solid var(--rule)}.content .exline .zh{font-size:1.3rem}.content .exline .pinyin{display:block}.content .exline .en{display:block;color:var(--muted);font-style:italic;font-size:.95rem}.tonetable td.tone-cell{font-family:var(--font-cjk);font-size:1.4rem}@media (max-width:640px){.panel{padding:18px 16px}.appbar{gap:10px 12px}.scoreboard{margin-left:0}.zh.big{font-size:2rem}.flashcard .fc-hz{font-size:2.7rem}.choices,.matchgrid{grid-template-columns:1fr}.tierbar .tb-name{width:98px}.tierbar .tb-n{width:74px}.dictpop{width:min(290px,calc(100vw - 24px))}}@media print{.appbar,.btn,.dictpop,.filterbar,.gradebar,.speak,.stepbar,.voicebar{display:none}.panel{border:0;padding:0}}