:root{--ink:#203c37;--muted:#697871;--line:#dedfd6;--soft:#f6f5f0;--blue:#315d4c;--blue-2:#315d4c;--green:#315d4c;--accent:#cf674a;--shadow:0 8px 24px #203c3706}
[hidden]{display:none!important}body{background:var(--soft);color:var(--ink)}button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default;opacity:.5}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid #d99845;outline-offset:3px}button,input,select,textarea{font:inherit}a{color:var(--green)}.skip-link{position:fixed;left:12px;top:-100px;z-index:100;background:white;padding:14px}.skip-link:focus{top:8px}
.site-header{height:88px;display:flex;align-items:center;justify-content:space-between;max-width:1280px;margin:auto;padding:0 44px;gap:24px;border-bottom:1px solid var(--line)}.site-brand{display:flex;gap:12px;align-items:center;text-decoration:none;color:var(--ink);font-size:26px;font-weight:760;letter-spacing:-1px}.brand-symbol{display:grid;place-items:center;width:44px;height:44px;background:var(--green);border-radius:14px 14px 4px 14px;color:#fff;font-size:32px;line-height:1;padding-bottom:4px;font-family:Georgia,serif}.brand-small{display:block;font-size:10px;letter-spacing:1px;font-weight:500;margin-top:2px;color:var(--muted)}.main-nav{display:flex;padding:5px;background:#eceee7;border-radius:30px;gap:4px}.main-nav button{color:var(--muted);background:none;border:0;border-radius:22px;padding:11px 21px;font-size:14px;min-height:44px;font-weight:650}.main-nav button.active{background:white;color:var(--ink);box-shadow:0 2px 5px #203c3708}.site-tag{font-size:11px;font-weight:700;letter-spacing:1px}.site-tag span{display:block;font-weight:400;color:var(--muted);letter-spacing:0;margin-top:4px;font-size:10px}
.site-notice{max-width:1100px;margin:16px auto 0;padding:13px 18px;border:1px solid #dcc39f;background:#fff4df;color:#705320;font-size:14px;border-radius:12px}.study{max-width:1192px;margin:auto;padding:40px 28px 28px;min-height:70vh}.study h1{font-size:clamp(28px,3.4vw,44px);font-weight:650;line-height:1.38;letter-spacing:-1px}.study h2{font-size:22px;line-height:1.5;font-weight:650}.study h3{font-size:17px;margin:0 0 10px;line-height:1.5}.study p{line-height:1.8}.study .muted{color:var(--muted);font-size:14px}.study .small{font-size:12px}.study .eyebrow{font-size:11px;letter-spacing:1.5px;font-weight:650;color:var(--muted);margin:0 0 14px}.study .lead{color:var(--muted);font-size:15px;margin:16px 0 24px;max-width:470px}.study button,.study .btn{border:1px solid var(--line);background:white;color:var(--ink);border-radius:12px;padding:11px 16px;min-height:44px;font-size:14px;line-height:1.4;font-weight:550;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;gap:9px}.study button:hover,.study .btn:hover{border-color:#9cac9d;background:#f5f8f2}.study .primary{background:var(--green);border-color:var(--green);color:white;padding:14px 22px}.study .primary:hover{background:#234b3b;color:white}.study .quiet{border-color:transparent;background:transparent;color:var(--muted)}.study .danger{color:#a43d32;border-color:#dcbbb4}.study .arrow{font-size:20px;font-weight:400}.row{display:flex;align-items:center;justify-content:space-between;gap:16px}.actions{display:flex;flex-wrap:wrap;gap:10px;align-items:center}.study .pill{font-size:11px;padding:5px 10px;border:1px solid var(--line);border-radius:20px;color:var(--muted);white-space:nowrap;display:inline-flex;align-items:center;gap:6px}.study .pill.green{border-color:#c7d9c3;background:#eff5e9;color:var(--green)}

.panel{background:#fffefb;border:1px solid var(--line);border-radius:17px;padding:24px;margin-bottom:22px}.panel-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:20px}.panel-head h2{font-size:18px}.mode-control{display:inline-flex;border:1px solid var(--line);border-radius:12px;padding:3px;gap:3px}.mode-control button{border:0;min-height:38px;padding:8px 13px;font-size:12px;background:transparent}.mode-control button.active{background:#eaf0e4;color:var(--green)}.metric-row{display:flex;gap:24px;margin:20px 0}.metric-row strong{display:block;font-size:26px;font-weight:500}.metric-row span{font-size:11px;color:var(--muted)}.panel .plain-link{font-size:13px;color:var(--green);text-decoration:none;border-bottom:1px solid #ced7c5;padding-bottom:4px}
.page-head{margin-bottom:26px}.page-head p{margin-bottom:0}.practice-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:22px 0}.practice-tile{text-align:left!important;align-items:flex-start!important;justify-content:flex-start!important;flex-direction:column;padding:22px!important;min-height:135px!important;background:#fffefb!important}.practice-tile strong{font-size:19px}.practice-tile span{font-size:12px;color:var(--muted);font-weight:400;line-height:1.8}.practice-tile .tile-num{font-size:11px;color:var(--accent);letter-spacing:1px;margin-bottom:4px}.filters{display:flex;gap:12px;flex-wrap:wrap;margin:20px 0}.study input:not([type=checkbox]),.study select,.study textarea{font-size:16px;color:var(--ink);background:#fff;border:1px solid var(--line);border-radius:10px;padding:12px;min-height:44px;max-width:100%;font-weight:400}.study textarea{width:100%;min-height:100px;resize:vertical;line-height:1.7}.study label{font-size:13px;color:var(--muted);display:block}.study label input,.study label select{display:block;margin-top:7px}.study label.check-label{display:flex;gap:9px;align-items:center}.study input[type=checkbox]{width:18px;height:18px;accent-color:var(--green)}.bank-row{display:flex;gap:16px;align-items:center;justify-content:space-between;border-bottom:1px solid #e9ece4;padding:17px 0}.bank-row:first-child{padding-top:0}.bank-row:last-child{border:0;padding-bottom:0}.bank-row .bank-text{min-width:0}.bank-row p{margin:0;font-size:15px;line-height:1.65;overflow-wrap:anywhere}.bank-row small{display:block;color:var(--muted);font-size:12px;margin-top:6px}.bank-row button{flex-shrink:0}.pager{display:flex;align-items:center;justify-content:center;gap:20px;margin-top:22px;color:var(--muted);font-size:12px}
.session-wrap{max-width:820px;margin:auto}.session-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:10px}.session-head span{font-size:13px;color:var(--muted)}.session-card{background:#fffefb;border:1px solid var(--line);border-radius:18px;padding:32px;margin-top:24px}.session-card .nl-large{font-size:clamp(23px,3vw,34px);line-height:1.55;margin:18px 0;overflow-wrap:anywhere}.session-card .text-passage{font-size:20px;line-height:1.95;white-space:pre-line;margin:18px 0 24px}.hint-box,.feedback-box{padding:17px 20px;background:#f2f5ec;border-left:3px solid #91a482;border-radius:0 10px 10px 0;margin:18px 0;font-size:14px;line-height:1.9}.hint-box p,.feedback-box p{margin:5px 0}.feedback-box.wrong{background:#faf0e9;border-color:#d69676}.sound-examples{display:flex;flex-wrap:wrap;gap:12px;margin:22px 0}.sound-example{flex:1;min-width:140px;background:#f1f4eb;border-radius:12px;padding:16px}.sound-example strong{display:block;white-space:nowrap;font-size:20px;font-weight:550;letter-spacing:2px;margin:8px 0}.sound-example span{display:block;color:var(--muted);font-size:12px;margin:5px 0}.sound-example button{margin-top:5px;font-size:12px}.answer-options{display:grid;gap:10px;margin:20px 0}.answer-options button{justify-content:flex-start;text-align:left;padding:15px 18px;min-height:52px;font-size:16px;font-weight:400}.answer-options button.selected{background:#eaf0e2;border-color:#7c946b}.answer-options button.correct-choice{border-color:#73976a;background:#edf5e8}.answer-options button.wrong-choice{border-color:#cd9b84;background:#fbefe7}.option-letter{color:var(--muted);font-size:12px;min-width:24px}.session-bottom{display:flex;justify-content:space-between;gap:10px;align-items:center;margin-top:25px;padding-top:21px;border-top:1px solid var(--line)}.record-area{margin:20px 0;padding:18px;border:1px dashed #c8d3be;border-radius:12px}.record-area p{margin:0 0 12px;font-size:12px;color:var(--muted)}.recording{background:#b84c3b!important;color:#fff!important;border-color:#b84c3b!important}.record-dot{width:8px;height:8px;background:currentColor;border-radius:50%;display:inline-block}.rating-actions{display:flex;gap:8px;flex-wrap:wrap;margin:20px 0 0}.rating-actions button{flex:1}.study details{margin:18px 0}.study summary{cursor:pointer;font-size:13px;padding:12px 0;color:var(--green)}.study pre{font:inherit;white-space:pre-wrap;word-break:break-word;font-size:14px;line-height:1.8;margin:0}.coach-panel{border-top:1px solid var(--line);padding-top:14px;margin-top:25px}.coach-panel input{width:100%;max-width:340px}.exam-timer{font-variant-numeric:tabular-nums;color:var(--accent)!important;font-size:22px!important;font-weight:600}.exam-pills{display:flex;flex-wrap:wrap;gap:7px;margin-bottom:18px}.exam-pills button{min-width:36px;min-height:36px;padding:6px;font-size:12px}.exam-pills button.active{background:var(--green);color:white;border-color:var(--green)}.exam-pills button.answered:not(.active){background:#eaf0e4}.review-result{padding:20px 0;border-bottom:1px solid var(--line)}.review-result p{margin:5px 0;font-size:14px}.table-wrap{overflow-x:auto}.study table{width:100%;border-collapse:collapse;font-size:13px;margin:20px 0}.study th,.study td{padding:13px 10px;text-align:left;border-bottom:1px solid var(--line);line-height:1.7;vertical-align:top}.study th{font-weight:550;color:var(--muted)}
.audio-bar{position:fixed;bottom:20px;right:24px;max-width:calc(100% - 48px);display:flex;align-items:center;gap:16px;background:#fffefb;border:1px solid var(--line);box-shadow:0 5px 25px #203c3712;padding:8px 10px 8px 16px;border-radius:14px;z-index:12;font-size:12px}.audio-bar button{background:#edf1e7;border:0;color:var(--ink);border-radius:8px;padding:10px;font-size:12px;min-height:40px;flex-shrink:0}.site-footer{max-width:1192px;margin:0 auto;padding:22px 28px 36px;font-size:11px;color:var(--muted);border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:16px}#library-view .topbar{position:relative;z-index:3}#library-view{padding-bottom:20px}#library-view .layout{max-width:1280px;margin:auto}#library-view .line-body .zh{font-size:14px;color:var(--muted)}
@media(max-width:900px){.site-header{padding:0 24px}.site-tag{display:none}.study{padding:28px 22px}.panel{padding:20px}.practice-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.site-header{height:76px;padding:0 22px}.site-brand{font-size:24px}.brand-symbol{width:39px;height:39px;font-size:29px}.main-nav{position:fixed;bottom:0;left:0;right:0;z-index:20;border-top:1px solid var(--line);border-radius:0;background:#fbfaf5f5;backdrop-filter:blur(16px);padding:8px 10px calc(8px + env(safe-area-inset-bottom));display:grid;grid-template-columns:repeat(4,1fr);gap:5px}.main-nav button{padding:12px 5px;font-size:13px;border-radius:10px}.main-nav button.active{box-shadow:none;background:#e7ede0}.site-tag{display:block;font-size:10px}.site-tag span{font-size:9px}.study{padding:24px 20px 35px;min-height:75vh}.study h1{font-size:32px;letter-spacing:-.6px}.study .lead{font-size:14px;line-height:1.8;margin:14px 0 20px}.panel{padding:20px;border-radius:15px;margin-bottom:16px}.panel-head h2{font-size:17px}.mode-control button{padding:8px 9px;font-size:11px}.practice-grid{gap:10px}.practice-tile{min-height:134px!important;padding:17px!important}.practice-tile strong{font-size:17px}.filters{gap:8px}.filters input{width:100%}.filters label{flex:1}.filters select{width:100%}.session-card{padding:22px 18px;margin-top:20px}.session-card .text-passage{font-size:19px;line-height:1.85}.session-head .quiet{padding-left:0}.session-card .nl-large{font-size:26px}.session-bottom{flex-wrap:wrap}.session-bottom .primary{flex:1}.sound-examples{gap:8px}.sound-example{min-width:100px;padding:12px}.sound-example strong{font-size:19px;letter-spacing:1px}.sound-example button{padding:8px 10px}.bank-row{gap:10px}.bank-row p{font-size:14px}.bank-row button{font-size:12px;padding:10px}.rating-actions button{font-size:12px;padding:11px 8px;min-width:90px}.site-footer{display:block;padding:20px 20px calc(102px + env(safe-area-inset-bottom));margin:0 20px}.site-footer span{display:block;margin-top:8px;line-height:1.7}.audio-bar{bottom:calc(75px + env(safe-area-inset-bottom));left:16px;right:16px;max-width:none;font-size:11px;justify-content:space-between}.site-notice{margin:12px 16px 0;font-size:12px}.row.wrap-mobile{align-items:flex-start;flex-direction:column}.study .metric-row{justify-content:space-between;gap:10px}.metric-row strong{font-size:24px}.study .btn,.study button{min-height:44px}.exam-timer{font-size:19px!important}.study th,.study td{padding:10px 7px;font-size:12px}#library-view .topbar{padding:16px}#library-view .content{padding-bottom:60px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
.session-progress{width:100%;height:5px;border:0;display:block;accent-color:#64805b;border-radius:4px}.session-progress::-webkit-progress-bar{background:#e8ece2;border-radius:4px}.session-progress::-webkit-progress-value{background:#64805b;border-radius:4px}#record-state{margin-top:12px}.session-wrap>.actions{margin-top:18px}.record-area .actions{gap:7px}.record-area .actions button{font-size:12px}.audio-bar #audio-label{min-width:0}.audio-bar button{font-size:11px}
.course-weeks{max-width:900px}.course-row{display:grid;grid-template-columns:68px minmax(0,1fr) auto;gap:14px;align-items:start;padding:19px 0;border-top:1px solid var(--line)}.course-row.current>div>strong{color:var(--green)}.course-day{font-size:12px;color:var(--muted);padding-top:3px}.course-row p{margin:5px 0}.course-row .unit-preview{margin:6px 0 0}.course-row .unit-preview summary{padding:6px 0}.course-row .unit-preview p{font-size:13px}.day-goal{margin:-12px 0 24px;color:var(--muted);font-size:14px}.day-route{grid-auto-columns:1fr;grid-auto-flow:column;grid-template-columns:none}.sound-example strong{white-space:normal;overflow-wrap:anywhere;letter-spacing:0}.sound-example{min-width:160px}.panel progress{width:100%;accent-color:var(--green)}
.today-page{max-width:760px;margin:0 auto}.today-heading{display:flex;justify-content:space-between;align-items:center;margin:8px 0 28px;gap:16px}.today-heading h1{margin:0}.today-heading .eyebrow{margin-bottom:7px}.day-route{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;margin-bottom:20px}.day-route button{background:transparent;flex-direction:column;gap:5px;padding:14px 6px}.day-route button.active{background:#e8eee2;border-color:#8ca17d}.day-route button>span{font-size:12px;color:var(--muted)}.day-route strong{font-size:14px;font-weight:550}.day-route small{font-size:11px;color:var(--muted)}.lesson-focus{padding:32px;background:#fffefb;border:1px solid var(--line);border-radius:18px;min-height:226px}.lesson-focus h2{font-size:28px;margin:0 0 16px}.lesson-focus .eyebrow{margin-bottom:10px}.focus-content{font-size:15px;color:var(--muted);margin:0 0 28px;overflow-wrap:anywhere}.focus-bottom{display:flex;align-items:center;justify-content:space-between;gap:16px}.today-options{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 0}.weekly-options{border-top:1px solid var(--line);padding-top:4px}.resume-link{margin:8px 0}.session-bottom>.actions{margin-left:auto}.page-head>.eyebrow:empty,#record-state:empty{display:none}.study details.panel>summary{font-size:16px;font-weight:550;padding:0}.study details.panel[open]>summary{margin-bottom:16px}
.study .day-selector{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:0 0 20px}.study .day-selector select{margin:0;min-width:0;max-width:75%;font-size:14px}.review-controls label{margin-bottom:18px}.review-controls select{width:100%}.review-controls .primary{width:100%}
@media(max-width:640px){.today-heading{margin:0 0 22px}.today-heading h1{font-size:28px}.day-route{gap:6px;margin-bottom:16px}.day-route strong{font-size:13px}.lesson-focus{padding:24px 20px;min-height:228px}.lesson-focus h2{font-size:25px}.focus-content{font-size:14px;margin-bottom:26px}.focus-bottom{align-items:stretch;flex-direction:column;gap:14px}.focus-bottom .primary{width:100%;justify-content:space-between}.today-options{gap:5px}.today-options .check-label,.today-options button{font-size:12px}.today-options button{padding-right:0}.session-bottom>.actions{width:100%;margin-left:0}.study{min-height:65vh}}