:root{--surface:#f7f7f5;--paper:#fff;--ink:#171717;--brand:#c9182b;--brand-dark:#9f1020;--brand-soft:#fff1f3;--brand-line:#f1b8c0;--muted:#777;--soft:#626262;--line:#e5e5e0;--line-strong:#d6d6d0;color:var(--ink);background:var(--surface);font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-family:PingFang SC,Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Microsoft YaHei,Arial,sans-serif;line-height:1.5}*{box-sizing:border-box}html{background:var(--surface);min-width:320px}body{min-width:320px;min-height:100svh;margin:0}img,svg{display:block}a{color:inherit}.app-shell{background:var(--surface);min-height:100svh;color:var(--ink);padding-bottom:76px}button,input,select,textarea{font:inherit}button{cursor:pointer}.topbar{z-index:20;border-bottom:1px solid var(--line);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);background:#f7f7f5e0;justify-content:space-between;align-items:center;gap:24px;padding:18px clamp(18px,4vw,48px);display:flex;position:sticky;top:0}.brand,.desktop-nav button,.mobile-nav button,.episode-card button,.caption-row,.result-list button{color:inherit;background:0 0;border:0}.brand{text-align:left;align-items:center;gap:12px;display:flex}.brand-mark{object-fit:contain;border-radius:8px;flex:none;width:38px;height:38px}.brand strong{font-size:20px;line-height:1.1;display:block}.brand small{color:var(--muted);margin-top:3px;font-size:12px;display:block}.desktop-nav{align-items:center;gap:6px;display:none}.desktop-nav button{min-height:34px;color:var(--muted);border-radius:999px;align-items:center;gap:6px;padding:0 11px;font-size:13px;display:inline-flex}.desktop-nav button svg{width:16px;height:16px}.desktop-nav button.active,.desktop-nav button:hover{background:var(--brand);color:#fff}.page{width:min(1880px,100%);margin:0 auto;padding:clamp(18px,3vw,42px)}.learn-layout{background:#f5f5f3;padding-top:24px}.home-layout{gap:clamp(16px,1.5vw,24px);padding-top:12px;display:grid}.study-panel{scrollbar-color:#1818182e transparent;scrollbar-width:thin;align-content:start;gap:16px;display:grid}.study-panel::-webkit-scrollbar{width:5px}.study-panel::-webkit-scrollbar-track{background:0 0}.study-panel::-webkit-scrollbar-thumb{background:#18181829;border-radius:999px}.study-panel::-webkit-scrollbar-thumb:hover{background:#18181842}.lab-sidebar-head,.home-calendar,.filter-panel,.profile-card,.upload-box,.admin-sidebar,.workflow-grid article,.method-grid article{border:1px solid var(--line);background:var(--paper);border-radius:8px;box-shadow:0 18px 48px #0000000a}.lab-sidebar-head{align-items:center;gap:14px;padding:18px;display:flex}.lab-sidebar-head img{object-fit:contain;flex:none;width:46px;height:46px}.lab-sidebar-head h1,.lab-sidebar-head p{margin:0}.lab-sidebar-head h1{font-size:21px;line-height:1.15}.lab-sidebar-head p,.page-heading p{color:var(--muted);font-weight:700}.page-heading h1,.profile-card h1{letter-spacing:0;margin:0;font-size:clamp(30px,5vw,60px);line-height:1.02}.page-heading span{max-width:720px;color:var(--soft);margin-top:18px;display:block}.metric-stack{gap:14px;display:grid}.metric{border:1px solid var(--line);background:#fff;border-radius:12px;grid-template-columns:42px minmax(0,1fr) auto;align-items:center;gap:14px;min-width:0;padding:17px 18px;display:grid;box-shadow:0 14px 32px #00000009}.metric.active{box-shadow:none;background:linear-gradient(135deg,#d2122b14,#d2122b04);border-color:#d2122b52}.metric svg{background:#f7f7f5;border-radius:12px;width:42px;height:42px;padding:12px}.metric.active svg{color:var(--brand);background:#fff}.metric.active em{color:var(--ink)}.metric strong{color:var(--brand);justify-self:end;font-size:25px}.metric span{color:var(--muted);gap:2px;display:grid}.metric em{color:var(--ink);font-size:16px;font-style:normal;font-weight:800}.metric small{color:var(--muted);font-size:13px}.metric.blue svg{color:#1777c7}.metric.green svg{color:#0d9e51}.metric.rose svg{color:#d90b52}.metric.dark svg{color:var(--brand)}.home-calendar{padding:18px}.calendar-head{justify-content:space-between;align-items:center;margin-bottom:16px;display:flex}.calendar-head button{width:30px;height:30px;color:var(--muted);background:0 0;border:0;border-radius:999px;font-size:24px;line-height:1}.calendar-head button:hover{background:var(--brand-soft);color:var(--brand)}.calendar-head strong{font-size:16px}.calendar-week,.calendar-grid{text-align:center;grid-template-columns:repeat(7,1fr);display:grid}.calendar-week{color:var(--muted);margin-bottom:8px;font-size:12px}.calendar-grid{gap:5px 2px}.calendar-grid span{color:#6f6f6f;border-radius:999px;place-items:center;min-height:32px;font-size:14px;display:grid;position:relative}.calendar-grid span.muted{color:#0000}.calendar-grid span.checked{color:#4f4f4f;font-weight:700}.calendar-grid span.checked:after{content:"";background:var(--brand-dark);border-radius:999px;width:5px;height:5px;position:absolute;bottom:1px;left:50%;transform:translate(-50%)}.calendar-grid span.today{background:var(--brand-soft);color:var(--brand);font-weight:800}.calendar-grid span.future{color:#b9b9b9}.filter-panel{padding:20px 18px}.section-title{align-items:center;gap:10px;margin-bottom:18px;display:flex}.section-title h1,.section-title h2{margin:0;font-size:22px}.field-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px 12px;display:grid}.filter-group-label{color:var(--muted);margin:16px 0 8px;font-size:13px;font-weight:800}label{color:var(--muted);gap:8px;font-size:14px;display:grid}input,select,textarea{box-sizing:border-box;border:1px solid var(--line-strong);width:100%;min-width:0;color:var(--ink);background:#fff;border-radius:8px;outline:none;padding:13px 14px}textarea{resize:vertical}input:focus,select:focus,textarea:focus{border-color:var(--brand);box-shadow:0 0 0 3px #c9182b1f}.tag-list,.pill-row{flex-wrap:wrap;gap:8px;display:flex}.episode-body .pill-row{flex-wrap:nowrap;align-items:center;gap:6px;height:28px;overflow:hidden}.tag-list{margin-top:0}.tag-list button,.pill-row span,.mode-tabs button{border:1px solid var(--line);color:var(--muted);background:#fff;border-radius:999px;padding:7px 11px;font-size:13px}.episode-body .pill-row span{white-space:nowrap;border-radius:4px;padding:4px 7px;font-size:12px;line-height:1.15}.episode-body .pill-row .accent-chip{color:var(--soft);background:0 0;border:0;margin-left:auto;padding:0}.tag-list button.active,.mode-tabs button.active{background:var(--brand);border-color:var(--brand);color:#fff}.tag-list button span{color:inherit;opacity:.72;margin-left:4px}.episode-grid{grid-template-columns:repeat(auto-fill,minmax(min(100%,280px),1fr));align-items:start;gap:clamp(18px,1.5vw,24px);display:grid}.episode-board{min-width:0;height:fit-content}.catalog-toolbar{z-index:10;border:1px solid var(--line);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);background:#ffffffe6;border-radius:8px;justify-content:space-between;align-items:center;gap:14px;margin-bottom:18px;padding:10px;display:flex;position:sticky;top:82px;box-shadow:0 16px 45px #0000000a}.episode-board .content-category-tabs{flex-wrap:wrap;flex:1;gap:8px;min-width:0;display:flex}.catalog-mode-switch{border:1px solid var(--line);background:#f3f5f8;border-radius:999px;flex:none;align-items:center;padding:3px;display:inline-flex}.catalog-mode-switch button{min-width:58px;color:var(--soft);white-space:nowrap;background:0 0;border:0;border-radius:999px;padding:7px 10px;font-size:13px;font-weight:900}.catalog-mode-switch button.active{background:var(--brand);color:#fff;box-shadow:0 8px 18px #c9182b33}.content-category-tabs button{border:1px solid var(--line);color:var(--ink);background:#fff;border-radius:999px;padding:7px 13px;font-size:13px;font-weight:800}.content-category-tabs button.active{background:var(--brand);border-color:var(--brand);color:#fff}.content-category-tabs span{background:#0000000f;border-radius:999px;place-items:center;min-width:22px;min-height:22px;margin-left:5px;font-size:11px;display:inline-grid}.empty-state{border:1px solid var(--line);min-height:280px;color:var(--soft);text-align:center;background:#fff;border-radius:8px;align-content:center;place-items:center;gap:10px;padding:28px;display:grid}.empty-state h1,.empty-state p{margin:0}.episode-card{border:1px solid var(--line);background:#fff;border-radius:10px;min-width:0;overflow:hidden;box-shadow:0 18px 44px #0000000e}.episode-card button{border-radius:inherit;text-align:left;flex-direction:column;width:100%;height:100%;min-height:500px;padding:0;display:flex;overflow:hidden}.cover-wrap{aspect-ratio:16/9;background:#ddd;flex:none;min-height:0;position:relative;overflow:hidden}.cover-wrap img{object-fit:cover;width:100%;height:100%;transition:transform .25s}.cover-placeholder{color:#fff;background:#151515;place-items:center;width:100%;height:100%;font-weight:800;display:grid}.episode-card:hover img{transform:scale(1.04)}.episode-cover-media{background:#e8e8e8;width:100%;height:100%;overflow:hidden}.episode-cover-media img{object-fit:cover;width:100%;height:100%;display:block}.episode-cover-media.loading img{opacity:0}.episode-cover-media.ready img{opacity:1}.video-load-state{z-index:3;color:#fff;background:#00000061;flex-direction:column;justify-content:center;align-items:center;gap:12px;font-size:14px;display:flex;position:absolute;inset:0}.video-load-state.loading{pointer-events:none}.video-load-state button{color:#202020;cursor:pointer;background:#fff;border:0;border-radius:6px;align-items:center;gap:8px;padding:10px 16px;display:inline-flex}.media-spinner{animation:1s linear infinite media-spin}@keyframes media-spin{to{transform:rotate(360deg)}}@media (prefers-reduced-motion:reduce){.media-spinner{animation:none}}.cover-wrap span,.cover-wrap strong{color:#fff;text-shadow:0 1px 8px #00000080;font-size:12px;position:absolute;bottom:9px}.cover-wrap span{left:11px}.cover-wrap strong{text-overflow:ellipsis;white-space:nowrap;max-width:calc(100% - 86px);font-size:12px;right:11px;overflow:hidden}.episode-body{flex-direction:column;flex:1;gap:8px;min-height:0;padding:15px 15px 16px;display:flex}.episode-topline,.episode-meta,.learner-top,.focus-toolbar,.caption-actions,.table-head,.table-row{justify-content:space-between;align-items:center;gap:12px;display:flex}.favorite-button,.caption-favorite{color:var(--muted);cursor:pointer;background:0 0;border:0;padding:0;transition:color .15s}.caption-favorite{border-radius:4px;align-items:center;padding:2px;display:inline-flex}.caption-favorite:hover{background:#d9155714}.favorite-button.active,.caption-favorite.active{color:var(--brand)}.episode-topline h2{min-width:0;margin:0;font-size:20px;line-height:1}.rating{color:#f6b800;flex-shrink:0;gap:1px;display:inline-flex}.accent,.episode-body p,.episode-meta{color:var(--soft)}.accent{margin:0;font-size:12px}.episode-body h3{-webkit-line-clamp:2;-webkit-box-orient:vertical;margin:0;font-size:15px;line-height:1.35;display:-webkit-box;overflow:hidden}.episode-body p{-webkit-line-clamp:2;-webkit-box-orient:vertical;margin:0;font-size:13px;line-height:1.5;display:-webkit-box;overflow:hidden}.episode-meta{white-space:nowrap;flex-wrap:nowrap;grid-template-columns:auto auto auto minmax(0,1fr);align-self:end;gap:10px;min-width:0;margin-top:0;font-size:12px;display:grid}.episode-body .study-tag-row,.episode-body .topic-tag-row{flex-wrap:wrap;height:auto;min-height:28px;overflow:visible}.episode-body .study-tag-row{align-self:start}.episode-body .topic-tag-row{justify-content:flex-start;align-self:start;width:100%;margin-top:auto}.episode-body .pill-row .study-chip{color:#2348c4;background:#eff3ff;border-color:#b7c7ff}.episode-body .pill-row .topic-chip{color:#9a4b00;background:#fff5e7;border-color:#ffd7a8}.episode-body .topic-tag-row .accent-chip{margin-left:auto}.text-back-button{color:var(--ink);background:0 0;border:0;align-items:center;gap:6px;padding:0;font-weight:800;display:inline-flex}.intensive-page{gap:20px;width:min(1680px,100%);max-width:1680px;padding-bottom:104px;display:grid}.intensive-hero{grid-template-columns:minmax(360px,.42fr) minmax(0,.58fr);align-items:start;gap:24px;display:grid}.intensive-cover{aspect-ratio:16/9;background:#ddd;border-radius:8px;overflow:hidden;box-shadow:0 18px 34px #0f172a14}.intensive-cover img,.intensive-cover video{object-fit:cover;width:100%;height:100%}.intensive-summary{align-content:start;gap:12px;min-width:0;display:grid}.intensive-kicker{color:var(--muted);flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;font-weight:800;display:flex}.intensive-kicker strong{color:var(--ink)}.intensive-summary h1{margin:0;font-size:32px;line-height:1.18}.intensive-summary p{color:var(--soft);margin:0;line-height:1.7}.intensive-tag-block,.intensive-actions,.intensive-tabs{flex-wrap:wrap;gap:7px;display:flex}.intensive-tag-block span{border:1px solid var(--line);color:var(--soft);background:#fff;border-radius:4px;padding:4px 7px;font-size:12px;font-weight:800;line-height:1.2}.intensive-tag-block .study-chip{color:#2348c4;background:#eff3ff;border-color:#b7c7ff}.intensive-tag-block .topic-chip{color:#9a4b00;background:#fff5e7;border-color:#ffd7a8}.intensive-actions button,.intensive-tabs button{border:1px solid var(--line);color:var(--ink);background:#fff;border-radius:8px;justify-content:center;align-items:center;gap:6px;padding:9px 14px;font-size:13px;font-weight:800;display:inline-flex}.intensive-actions button:first-child,.intensive-tabs button.active{border-color:var(--brand);background:var(--brand);color:#fff}.intensive-actions button:disabled{cursor:wait;opacity:.62}.intensive-overview-card,.intensive-reading-card,.lecture-block{border:1px solid var(--line);background:#fff;border-radius:8px;padding:18px}.intensive-overview-card{background:#fbfcff;gap:10px;display:grid}.intensive-overview-card h2,.intensive-section-head h2,.lecture-block h3{color:var(--ink);margin:0;font-size:17px}.intensive-overview-card div{flex-wrap:wrap;gap:7px;display:flex}.intensive-overview-card div span{color:#475569;background:#eef2f7;border-radius:999px;padding:4px 8px;font-size:12px;font-weight:800}.intensive-section-head{gap:4px;margin-bottom:14px;display:grid}.intensive-section-head span{color:var(--muted);text-transform:uppercase;font-size:12px;font-weight:900}.intensive-prose,.intensive-translation-prose{gap:14px;display:grid}.intensive-prose p,.intensive-translation-prose p,.lecture-block p{color:var(--soft);margin:0;line-height:1.7}.intensive-prose p{color:var(--ink);font-size:17px;line-height:1.9}.intensive-translation-prose{border-top:1px solid var(--line);margin-top:18px;padding-top:16px}.intensive-translation-prose p{font-size:14px}.intensive-mark-legend{flex-wrap:wrap;gap:8px;display:flex}.intensive-review-shell{gap:14px;display:grid}.intensive-review-board{grid-template-columns:1fr;align-items:start;gap:18px;display:grid}.review-document,.review-sidebar{border:1px solid var(--line);background:#fff;border-radius:8px;padding:20px}.review-document{min-width:0}.review-sidebar{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;display:grid}.review-sidebar .intensive-section-head{grid-column:1/-1;margin-bottom:0}.review-prose{gap:18px;display:grid}.review-prose p{color:var(--ink);margin:0;font-size:15px;line-height:1.82}.review-anchored-sentence{position:relative}.review-sentence{color:inherit;font:inherit;line-height:inherit;text-align:left;cursor:pointer;background:0 0;border:0;border-radius:6px;padding:2px}.review-sentence:hover,.review-sentence.active{background:#f8fafc;box-shadow:inset 0 -2px #0f172a14}.review-anchor{color:inherit;font:inherit;line-height:inherit;text-align:left;background:#fff5c2;border-radius:4px;padding:1px 3px;position:relative}.review-anchor sup{color:#fff;background:#0f172a;border-radius:999px;place-items:center;min-width:17px;height:17px;margin-left:3px;font-size:10px;font-weight:900;line-height:1;display:inline-grid}.review-anchor.active{outline-offset:2px;outline:2px solid #0f172a2e}.review-anchor.expression{color:#1d4ed8;background:#e8f1ff}.review-anchor.grammar{color:#7e22ce;background:#f3e8ff}.review-anchor.tone{color:#be123c;background:#ffe8ec}.review-anchor.logic{color:#1d4ed8;background:0 0;border-bottom:2px solid #2563eb;border-radius:0}.review-comment{border:1px solid var(--line);color:var(--soft);text-align:left;background:#fbfcff;border-radius:8px;align-content:start;gap:9px;padding:15px 16px 15px 42px;scroll-margin-top:96px;display:grid;position:relative}.review-comment:before,.review-comment:after{display:none}.review-comment.active{background:#fff;border-color:#94a3b8;box-shadow:0 16px 32px #0f172a14}.review-comment>span{color:#fff;background:#0f172a;border-radius:999px;place-items:center;width:20px;height:20px;font-size:11px;font-weight:900;display:inline-grid;position:absolute;top:12px;left:12px}.review-comment strong{color:var(--ink);font-size:15px}.review-comment em{color:#334155;font-size:13px;font-style:normal;font-weight:900}.review-comment p{color:var(--soft);margin:0;font-size:14px;line-height:1.82}.review-comment dl{gap:8px;margin:2px 0 0;display:grid}.review-comment dl div{border-top:1px solid #eef2f7;gap:3px;padding-top:8px;display:grid}.review-comment dt{color:var(--ink);font-size:12px;font-weight:900}.review-comment dd{color:var(--soft);margin:0;font-size:13px;line-height:1.72}.review-return-button{z-index:20;color:var(--ink);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#fffffff0;border:1px solid #cbd5e1eb;border-radius:999px;justify-items:center;gap:3px;padding:10px 18px;display:inline-grid;position:fixed;bottom:20px;left:50%;transform:translate(-50%);box-shadow:0 16px 34px #0f172a24}.review-return-button span{color:var(--muted);font-size:12px;font-weight:900}.review-comment.main-idea>span,.review-comment.main-idea.active>span{background:#a16207}.review-comment.expression>span,.review-comment.expression.active>span{background:#2563eb}.review-comment.grammar>span,.review-comment.grammar.active>span{background:#7e22ce}.review-comment.tone>span,.review-comment.tone.active>span{background:#be123c}.review-comment.logic>span,.review-comment.logic.active>span{background:#1d4ed8}.review-support-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;display:grid}.lecture-block{gap:12px;display:grid}.lecture-mark{border-radius:4px;padding:1px 3px}.lecture-mark.main-idea{color:#7a4b00;background:#fff5c2}.lecture-mark.expression{color:#1d4ed8;background:#e8f1ff}.lecture-mark.grammar{color:#7e22ce;background:#f3e8ff}.lecture-mark.tone{color:#be123c;background:#ffe8ec}.lecture-mark.logic{color:#1d4ed8;background:0 0;border-bottom:2px solid #2563eb;border-radius:0;padding:0 1px}.practice-page{grid-template-columns:minmax(0,860px) 180px;place-content:start center;align-items:start;gap:18px;min-height:calc(100vh - 92px);display:grid}.practice-page .text-back-button{grid-column:1/-1}.practice-shell{border:1px solid var(--line);background:#fff;border-radius:8px;justify-items:center;gap:18px;width:100%;max-width:860px;padding:34px;display:grid;box-shadow:0 18px 40px #0f172a12}.practice-shell video{display:none}.practice-topline{width:100%;color:var(--muted);justify-content:space-between;gap:14px;font-size:13px;font-weight:800;display:flex}.practice-shell h1{text-align:center;max-width:720px;margin:0;font-size:24px;line-height:1.35}.practice-shell p{max-width:680px;color:var(--soft);text-align:center;margin:0;font-size:20px;line-height:1.7}.practice-play-button{border:1px solid var(--line);width:56px;height:56px;color:var(--brand);background:#fff;border-radius:50%;place-items:center;display:inline-grid;position:relative;box-shadow:0 10px 25px #0f172a17}.practice-play-button.playing{background:#fff7f7;border-color:#d2122b3d}.practice-volume-bars{align-items:center;gap:4px;height:32px;display:none;position:absolute;right:-46px}.practice-play-button.playing .practice-volume-bars{display:inline-flex}.practice-volume-bars i{background:var(--brand);opacity:.72;border-radius:999px;width:5px;height:10px;animation:.7s ease-in-out infinite practice-volume;display:block}.practice-volume-bars i:nth-child(2){animation-delay:.1s}.practice-volume-bars i:nth-child(3){animation-delay:.2s}.practice-volume-bars i:nth-child(4){animation-delay:.3s}.practice-answer-row{flex-wrap:wrap;justify-content:center;justify-self:center;align-items:end;gap:12px 8px;width:100%;max-width:760px;padding:12px 0 4px;display:flex}.practice-answer-row input{width:120px;min-width:58px;max-width:150px;height:44px;color:var(--ink);text-align:center;background:#f8fafc;border:0;border-bottom:2px solid #cfd6e3;border-radius:0;font-size:22px;font-weight:800}.practice-answer-row input::placeholder{color:#9ba2ad;opacity:1;font-weight:700}.practice-given-word{min-height:44px;color:var(--ink);align-items:center;padding:0 3px 8px;font-size:22px;font-weight:800;display:inline-flex}.practice-word-slot{justify-items:center;gap:5px;min-height:64px;display:grid}.practice-keyboard-hint{border:1px solid var(--line);min-width:0;color:var(--muted);background:#fff;border-radius:8px;align-self:start;gap:8px;margin-top:190px;padding:14px;font-size:12px;line-height:1.45;display:grid;box-shadow:0 12px 28px #0f172a0f}.practice-shortcut-buttons{align-items:center;gap:6px;display:flex}.practice-shortcut-buttons span{border:1px solid var(--line-strong);min-width:32px;height:30px;color:var(--ink);background:#f8fafc;border-radius:7px;place-items:center;font-size:12px;font-weight:900;display:inline-grid;box-shadow:inset 0 -2px #0f172a0f}.practice-shortcut-buttons span:first-child{min-width:48px}.practice-keyboard-hint strong{color:var(--soft);font-size:12px}.practice-keyboard-hint em{color:var(--muted);font-size:11px;font-style:normal}.practice-answer-row input.correct{color:#05704b;background:#ebf9f2;border-bottom-color:#15a36d}.practice-answer-row input.inspectable{cursor:pointer}.practice-answer-row input.inspectable:hover,.practice-answer-row input.inspectable:focus{box-shadow:0 6px 14px #15a36d24}.practice-answer-row input.wrong{color:#b91c1c;background:#fff1f1;border-bottom-color:#dc2626;animation:.22s ease-in-out practice-shake}.practice-punct{min-width:10px;color:var(--ink);font-size:28px;font-weight:800;line-height:44px}.practice-result{border-radius:8px;padding:8px 12px;font-size:13px;font-weight:800}.practice-result.correct{color:#05704b;background:#ebf9f2}.practice-result.wrong{color:#b91c1c;background:#fff1f1}.practice-word-info{text-align:left;background:#f8fafc;border:1px solid #e2e8f0;border-radius:8px;gap:10px;width:min(100%,620px);margin:0 auto;padding:14px;display:grid;position:relative;box-shadow:0 12px 24px #0f172a0f}.practice-word-tags{flex-wrap:wrap;align-items:center;gap:6px;padding-right:28px;display:flex}.practice-pos-chip{color:#475569;background:#fff;border:1px solid #dbe3ee;border-radius:999px;align-items:center;min-height:22px;padding:2px 9px;font-size:12px;font-style:normal;font-weight:900;display:inline-flex}.practice-word-headline{flex-wrap:wrap;align-items:baseline;gap:10px 14px;display:flex}.practice-word-headline>strong{color:var(--ink);font-size:22px;line-height:1.15}.practice-word-headline>p{min-width:160px;color:var(--soft);flex:1;font-size:15px;font-weight:800}.practice-word-info p,.practice-word-info small{color:var(--soft);margin:0;font-size:13px;line-height:1.7}.practice-word-info small{color:var(--muted)}.practice-word-info-close{border:1px solid var(--line);width:28px;height:28px;color:var(--muted);background:#fff;border-radius:999px;place-items:center;display:inline-grid;position:absolute;top:10px;right:10px}.practice-word-pronounce{flex-wrap:wrap;gap:8px;display:flex}.practice-word-pronounce button{border:1px solid var(--line);color:var(--soft);background:#fff;border-radius:8px;align-items:center;gap:5px;padding:7px 10px;font-size:12px;font-weight:800;display:inline-flex}.practice-word-phrases{flex-wrap:wrap;align-items:center;gap:6px;display:flex}.practice-word-phrases span{color:var(--muted);font-size:12px;font-weight:900}.practice-word-phrases em{color:#334155;background:#eef2ff;border-radius:999px;padding:3px 8px;font-size:12px;font-style:normal;font-weight:800}.practice-actions,.practice-mode-links{flex-wrap:wrap;justify-content:center;gap:10px;display:flex}.practice-actions button,.practice-mode-links button{border:1px solid var(--line);min-height:38px;color:var(--ink);background:#fff;border-radius:8px;align-items:center;gap:6px;padding:8px 13px;font-size:13px;font-weight:800;display:inline-flex}.practice-actions button:disabled{cursor:not-allowed;opacity:.45}.practice-actions .practice-submit-button,.practice-mode-links button{border-color:var(--brand);background:var(--brand);color:#fff}.mistakes-page>h1{margin-bottom:8px}.mistake-audio{display:none}.mistakes-list{margin-top:18px}.mistake-item{text-align:left;gap:10px;display:grid}.mistake-item-head{color:var(--muted);justify-content:space-between;gap:12px;font-size:12px;font-weight:800;display:flex}.mistake-item-head span{text-overflow:ellipsis;white-space:nowrap;min-width:0;overflow:hidden}.mistake-item-head em{color:#b91c1c;background:#fff1f1;border-radius:999px;flex:none;padding:3px 8px;font-style:normal}.mistake-item small{color:var(--soft);border-left:3px solid #fee2e2;padding-left:10px;line-height:1.6;display:block}.mistake-actions{flex-wrap:wrap;gap:8px;display:flex}.mistake-actions button{border:1px solid var(--line);min-height:34px;color:var(--ink);background:#fff;border-radius:8px;align-items:center;gap:6px;padding:7px 11px;font-size:13px;font-weight:800;display:inline-flex}.mistake-actions button:first-child{color:var(--brand);border-color:#d2122b3d}.mistake-actions button:disabled{cursor:not-allowed;opacity:.45}@keyframes practice-shake{0%,to{transform:translate(0)}35%{transform:translate(-4px)}70%{transform:translate(4px)}}@keyframes practice-volume{0%,to{height:10px}45%{height:26px}}@media (width<=1100px){.intensive-review-board,.review-sidebar{grid-template-columns:1fr}.review-comment:before,.review-comment:after{display:none}}@media (width<=760px){.intensive-hero{grid-template-columns:1fr}.catalog-toolbar{flex-direction:column;align-items:flex-start}.catalog-mode-switch{align-self:flex-end}.intensive-review-board,.review-support-grid,.review-sidebar{grid-template-columns:1fr}.review-comment:before,.review-comment:after{display:none}.intensive-summary h1{font-size:26px}.practice-shell{padding:22px 14px}.practice-page{grid-template-columns:1fr}.practice-shell h1{font-size:20px}.practice-shell p{font-size:17px}.practice-answer-row{gap:10px 6px}.practice-keyboard-hint{display:none}.practice-answer-row input{width:104px;font-size:19px}.practice-given-word{font-size:19px}}.episode-meta span{text-overflow:ellipsis;min-width:0;overflow:hidden}@media (width<=920px) and (orientation:landscape){.app-shell:has(.practice-page){padding-bottom:0}.practice-page{grid-template-columns:minmax(0,1fr) 156px;align-items:center;gap:12px;min-height:100dvh;padding:10px 12px}.practice-page .text-back-button{z-index:8;position:fixed;top:10px;left:12px}.practice-shell{gap:10px;max-width:none;min-height:calc(100dvh - 20px);padding:18px 22px}.practice-shell h1{max-width:620px;font-size:18px;line-height:1.3}.practice-shell p{max-width:640px;font-size:16px;line-height:1.45}.practice-play-button{width:46px;height:46px}.practice-answer-row{gap:8px 6px;max-width:680px;padding:4px 0}.practice-word-slot{min-height:50px}.practice-answer-row input{width:104px;height:36px;font-size:18px}.practice-given-word{min-height:36px;font-size:18px}.practice-actions{gap:8px}.practice-actions button{min-height:36px;padding:8px 12px}.practice-keyboard-hint{align-self:center;margin-top:0;padding:12px;display:grid}}.episode-meta span:last-child{justify-self:end}.learner-top{grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:12px;margin-bottom:14px;display:grid}.learner-top p{color:var(--muted);margin:0 0 2px}.learner-top h1{margin:0;font-size:clamp(16px,1.45vw,22px);line-height:1.25}.icon-button{width:28px;height:28px;color:var(--ink);background:0 0;border:0;border-radius:0;flex:none;place-items:center;display:grid}.learn-mode-bar{justify-content:flex-end;align-items:center;gap:14px;margin:-42px 0 14px auto;display:flex}@media (width>=761px) and (width<=1100px){.learn-mode-bar{margin:0 0 14px}}@media (width>=1101px){.learner-top{padding-right:640px}}.mode-tabs{background:#eeeeec;border-radius:10px;justify-content:flex-end;gap:0;width:fit-content;max-width:100%;padding:4px;display:flex;overflow-x:auto;box-shadow:inset 0 0 0 1px #00000008}.mode-tabs button{min-width:56px;color:var(--ink);background:0 0;border:0;border-radius:8px;flex:none;padding:6px 13px;font-size:12px;font-weight:700;position:relative}.mode-tabs button+button:before{content:"";background:#00000014;width:1px;position:absolute;top:8px;bottom:8px;left:0}.mode-tabs button.active{color:var(--ink);background:#fff;box-shadow:0 2px 8px #00000014}.mode-tabs button.active:before,.mode-tabs button.active+button:before{display:none}.learning-workspace{align-items:stretch;gap:24px;min-height:0;display:grid;overflow:hidden}.player-column{grid-template-rows:auto auto minmax(0,1fr);gap:14px;min-width:0;height:100%;min-height:0;display:grid;overflow:hidden}.video-stage{aspect-ratio:16/9;background:#151515;border-radius:8px;position:relative;overflow:hidden}.video-stage img,.video-stage video{object-fit:cover;width:100%;height:100%}.video-stage.hidden{cursor:pointer}.video-stage.hidden img,.video-stage.hidden video{filter:blur(12px);opacity:0;pointer-events:none}.video-stage.hidden .video-progress,.video-stage.hidden .video-center-play{display:none}.video-stage.hidden:before{content:"";z-index:2;-webkit-backdrop-filter:none;backdrop-filter:none;pointer-events:none;background:#f2f2f0;position:absolute;inset:0}.video-hidden-message{z-index:3;color:var(--ink);pointer-events:none;place-content:center;place-items:center;gap:6px;font-size:15px;display:grid;position:absolute;inset:0}.video-hidden-message strong{font-size:16px}.video-stage img{opacity:.82}.video-stage:after{content:"";pointer-events:none;background:linear-gradient(#0000,#0000009e);height:86px;position:absolute;bottom:0;left:0;right:0}.video-stage>button{background:#ffffffdb;border:0;border-radius:999px;place-items:center;width:82px;height:82px;display:grid;position:absolute;inset:50% auto auto 50%;transform:translate(-50%,-50%)}.video-center-play{z-index:3;color:#fff;filter:drop-shadow(0 2px 8px #00000059);background:0 0;border:0;width:86px;height:86px}.video-center-play svg{fill:#0000;stroke-width:1.7px}.video-progress{z-index:2;color:#fff;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:11px;font-size:13px;display:grid;position:absolute;bottom:14px;left:18px;right:18px}.video-progress span{font-variant-numeric:tabular-nums;min-width:36px}.video-progress span:last-child{text-align:right}.video-progress-track{min-width:0;display:grid;position:relative}.video-progress input[type=range]{height:14px;box-shadow:none;accent-color:#fff;appearance:none;cursor:pointer;background:0 0;border:0;border-radius:0;outline:none;padding:0}.video-progress input[type=range]::-webkit-slider-runnable-track{background:linear-gradient(90deg, #fff 0, #fff var(--video-progress,0%), #ffffff52 var(--video-progress,0%), #ffffff52 100%);border:0;border-radius:999px;height:3px;transition:height .16s}.video-progress input[type=range]::-webkit-slider-thumb{width:0;height:0;box-shadow:none;appearance:none;opacity:0;background:#fff;border:0;border-radius:999px;margin-top:1.5px;transition:width .16s,height .16s,margin-top .16s,opacity .16s}.video-stage:hover .video-progress input[type=range]::-webkit-slider-runnable-track{height:5px}.video-stage:hover .video-progress input[type=range]::-webkit-slider-thumb{opacity:1;width:12px;height:12px;margin-top:-3.5px}.video-progress input[type=range]::-moz-range-track{background:linear-gradient(90deg, #fff 0, #fff var(--video-progress,0%), #ffffff52 var(--video-progress,0%), #ffffff52 100%);border:0;border-radius:999px;height:3px}.loop-marker{z-index:2;pointer-events:none;background:#1fd071;border-radius:999px;width:4px;height:13px;position:absolute;top:50%;transform:translate(-50%,-50%)}.loop-marker.a{left:var(--loop-a,0%)}.loop-marker.b{left:var(--loop-b,0%);background:#fff}.loop-notice{z-index:4;color:#222;white-space:nowrap;background:#ffffffe6;border:1px solid #0000001f;border-radius:10px;padding:9px 18px;position:absolute;bottom:calc(100% + 16px);left:0;box-shadow:0 8px 24px #0000001f}.video-progress input[type=range]::-moz-range-thumb{opacity:0;background:#fff;border:0;border-radius:999px;width:0;height:0}.video-stage:hover .video-progress input[type=range]::-moz-range-track{height:5px}.video-stage:hover .video-progress input[type=range]::-moz-range-thumb{opacity:1;width:12px;height:12px}.control-strip{scrollbar-width:none;justify-content:space-between;align-items:center;gap:6px;padding:2px 0 0;display:flex;overflow-x:auto}.control-strip::-webkit-scrollbar{display:none}.control-strip button{color:#4c4c4c;background:0 0;border:0;border-radius:0;justify-content:center;align-items:center;gap:4px;min-width:56px;min-height:48px;font-size:12px;display:grid}.control-strip button>svg,.control-strip button>span{box-sizing:border-box;color:#4f4f4f;background:#eee;border-radius:999px;justify-self:center;place-items:center;width:28px;height:28px;padding:6px;display:grid}.control-strip .rate-control>span{background:0 0;width:auto;height:28px;padding:0}.control-strip .quality-control{flex:0 0 80px;align-content:center;justify-items:center;gap:4px;min-height:48px;display:grid}.control-strip .quality-control select{color:#4c4c4c;width:80px;height:28px;font:inherit;cursor:pointer;background:0 0;border:0;border-radius:4px;padding:0 4px;font-size:12px}.control-strip .quality-control select:focus-visible{outline:2px solid var(--brand);outline-offset:1px}.control-strip .loop-close>span,.control-strip .control-active>svg,.control-strip .control-active>span{color:var(--brand);background:#ffe8ef}.control-strip .play-button{color:#4c4c4c;background:0 0;border-radius:999px;min-width:56px;min-height:48px}.control-strip small{color:#686868;font-size:12px;line-height:1}.control-strip .play-button svg,.control-strip button[aria-label=上一句] svg,.control-strip button[aria-label=下一句] svg{color:#fff;background:#555;padding:7px}.control-strip .play-button svg{fill:#fff;stroke:#fff}.learn-tools{align-items:center;gap:13px;display:inline-flex}.learn-tools button{width:24px;height:24px;color:var(--ink);background:0 0;border:0;border-radius:999px;place-items:center;display:grid}.learn-tools button:hover{background:#eeeeec}.focus-card,.caption-row{border:1px solid var(--line);background:#fff;border-radius:8px}.focus-card{scrollbar-color:#1818182e transparent;scrollbar-width:thin;gap:10px;height:100%;min-height:0;padding:16px 18px;display:grid;position:relative;overflow:auto}.focus-card::-webkit-scrollbar{width:5px}.focus-card::-webkit-scrollbar-track{background:0 0}.focus-card::-webkit-scrollbar-thumb{background:#18181829;border-radius:999px}.focus-card.hidden>:not(.focus-hidden-message){filter:blur(8px);opacity:.24;pointer-events:none}.focus-card>.caption-english,.focus-card>p:nth-child(2),.focus-primary{color:var(--ink);text-align:center;align-self:end;font-size:clamp(17px,2.2vw,24px);font-weight:700;line-height:1.28}.focus-card>.caption-english{gap:14px;display:grid}.focus-card>.caption-english p{margin:0}.sentence-phonetic{color:#565656;font-family:Georgia,Times New Roman,serif;font-size:15px;font-weight:400;line-height:1.35;display:block}.focus-card .sentence-phonetic{font-size:14px}.focus-card>p:nth-child(3),.practice-panel>p,.reading-card>p:last-child{color:var(--soft);text-align:center;margin:0}.focus-card>p:nth-child(3){font-size:14px;line-height:1.45}.practice-panel,.reading-card,.word-card-list{align-content:center;gap:14px;display:grid}.practice-panel textarea{resize:vertical;min-height:130px}.practice-panel small{color:var(--soft);line-height:1.6}.word-card-list{grid-template-columns:1fr}.word-card{border:1px solid var(--line);text-align:center;background:#fff8fb;border-radius:8px;gap:8px;padding:16px;display:grid}.word-card strong{color:#b5124b;font-size:24px}.word-card.new{background:#fff7e8}.word-card.new strong{color:#a45600}.word-card.common{background:#edf8f3}.word-card.common strong{color:#087348}.word-card span{color:var(--soft)}.word-card-panel-host{gap:0;padding:0 8px 0 0}.wordbook-panel,.wordbook-detail{min-height:100%;color:var(--ink);align-content:start;gap:0;display:grid}.wordbook-toolbar{z-index:4;background:#f7f7f5;align-items:center;gap:10px;padding:0 0 14px;display:flex;position:sticky;top:0}.wordbook-toolbar button{color:#4c4c4c;background:0 0;border:0;border-radius:999px;align-items:center;gap:5px;min-height:30px;padding:0 13px;font-size:13px;display:inline-flex}.wordbook-toolbar button.active,.wordbook-filter-button{color:#161616;background:#fff;box-shadow:0 1px 8px #14141414}.wordbook-toolbar>span{color:#9a9a9a;margin-left:auto;font-size:14px}.wordbook-filters{gap:10px;padding:0 0 16px 16px;display:grid}.wordbook-filters>span{color:#5d5d5d;font-size:13px}.wordbook-filters>div{flex-wrap:wrap;gap:8px;display:flex}.wordbook-filters button{color:#666;background:#fff;border:1px solid #00000014;border-radius:999px;padding:5px 13px;font-size:13px}.wordbook-filters button.active{color:var(--brand);background:#fff0f3;border-color:#d1122f40}.wordbook-list{gap:0;display:grid}.wordbook-row{min-height:57px;color:var(--ink);text-align:left;background:0 0;border:0;border-bottom:1px solid #00000012;border-radius:0;grid-template-columns:28px minmax(0,1fr) auto auto 20px;align-items:center;gap:10px;padding:0 9px 0 16px;display:grid}.wordbook-row:hover{background:#ffffffbd}.wordbook-row span{color:#9a9a9a;font-size:14px}.wordbook-row strong{text-overflow:ellipsis;white-space:nowrap;font-size:18px;font-weight:650;overflow:hidden}.wordbook-row em,.wordbook-kind{color:#2566ff;background:#eef4ff;border-radius:6px;padding:3px 7px;font-size:12px;font-style:normal}.wordbook-row em:empty{display:none}.exam-tag.ielts{color:#d7274f;background:#fff1f4;border-color:#ffc6d2}.exam-tag.toefl{color:#315efb;background:#eef2ff;border-color:#c9d5ff}.exam-tag.postgrad{color:#c35a00;background:#fff4e5;border-color:#ffd8a8}.exam-tag.tem4{color:#1f7a4d;background:#eefaf3;border-color:#bde8ce}.exam-tag.tem8{color:#097078;background:#ecfdfd;border-color:#b6ecec}.exam-tag.cet4{color:#2563eb;background:#f2f7ff;border-color:#c8dcff}.exam-tag.cet6{color:#6d3fd1;background:#f3f0ff;border-color:#d8ceff}.exam-tag.upgrade{color:#987000;background:#fff8db;border-color:#f3dd83}.exam-tag.gaokao{color:#52525b;background:#f4f4f5;border-color:#dedee3}.exam-tag.zhongkao{color:#047857;background:#ecfdf5;border-color:#b9e8d2}.wordbook-row i{color:#e46f12;background:#fff0d9;border-radius:6px;padding:3px 7px;font-size:12px;font-style:normal}.wordbook-empty{color:var(--soft);text-align:center;margin:42px 0}.wordbook-detail{gap:17px;padding:6px 14px 36px}.wordbook-detail>header{grid-template-columns:auto minmax(0,1fr) auto auto;align-items:center;gap:12px;display:grid}.wordbook-detail>header button{width:34px;height:34px;color:var(--ink);background:0 0;border:0;place-items:center;padding:0;display:grid}.wordbook-detail h2{margin:0;font-family:Georgia,Times New Roman,serif;font-size:30px;font-weight:500}.wordbook-star.active{color:var(--brand)}.wordbook-star:disabled{opacity:.45}.wordbook-phonetics{color:#777;grid-template-columns:auto auto 1fr;align-items:center;gap:18px;font-size:13px;display:grid}.wordbook-phonetics button{color:inherit;font:inherit;background:0 0;border:0;align-items:center;gap:6px;padding:0;display:inline-flex}.wordbook-phonetics button span{color:#333;font-family:Georgia,Times New Roman,serif}.wordbook-phonetics div{justify-content:end;gap:7px;display:flex}.wordbook-phonetics em{color:#0aa64f;border:1px solid #2bc870;border-radius:5px;padding:2px 8px;font-size:12px;font-style:normal}.word-exam-tags{flex-wrap:wrap;gap:8px;margin-bottom:12px;display:flex}.word-exam-tags em{border:1px solid #0000;border-radius:999px;padding:4px 10px;font-size:12px;font-style:normal}.wordbook-definition-card{background:#fff;border-radius:10px;gap:10px;padding:18px 20px;display:grid;box-shadow:0 1px 8px #1414141f}.wordbook-definition-card p,.wordbook-definition-card strong{margin:0}.wordbook-definition-card p:first-child{color:#1f1f1f;align-items:center;gap:8px;font-weight:650;display:flex}.wordbook-definition-card p:first-child span{color:#2566ff;background:#eaf1ff;border-radius:5px;padding:2px 7px;font-size:12px}.wordbook-definition-card strong{color:#444;font-size:16px;font-weight:500}.wordbook-definition-card small,.wordbook-definition-card p:last-child{color:#777}.wordbook-occurrences{gap:0;display:grid}.wordbook-occurrences>button{background:0 0;border:0;justify-content:space-between;padding:12px 0 16px;font-size:16px;display:flex}.wordbook-occurrences article{border-bottom:1px solid #0000000f;gap:9px;padding:17px 0;display:grid}.wordbook-occurrences article>div{color:#9a9a9a;justify-content:space-between;font-size:13px;display:flex}.wordbook-occurrences .caption-english>p,.wordbook-occurrences article>p{margin:0}.wordbook-occurrences .caption-english,.wordbook-occurrences .caption-english>p{display:block}.wordbook-occurrences .caption-english{color:var(--ink);font-size:17px;line-height:1.55}.wordbook-occurrences article>p{color:#777;font-size:14px}.word-card-focus-list{gap:12px;display:grid}.word-card-focus-item{border:1px solid var(--line);text-align:left;background:#fff;border-radius:8px;gap:6px;padding:12px 14px;display:grid}.word-card-focus-item strong{color:var(--ink);font-size:18px}.word-card-focus-item span{color:#777;font-size:14px}.word-sheet-backdrop{z-index:40;background:#0003;align-items:end;display:grid;position:fixed;inset:0}.word-sheet{background:#f7f7f7;border-radius:8px 8px 0 0;justify-self:center;width:min(620px,100vw);max-height:84vh;overflow:auto;box-shadow:0 -18px 50px #00000029}.word-sheet-bar{background:#d4d4d4;border-radius:999px;width:46px;height:4px;margin:12px auto 10px}.word-sheet header{border-bottom:1px solid var(--line);background:#eef1ff;grid-template-columns:1fr auto;gap:12px;padding:14px 18px;display:grid}.word-sheet header>button{background:0 0;border:0;grid-area:1/2;font-size:26px}.word-sheet header>div{grid-column:1;align-items:center;gap:12px;display:flex}.word-favorite{width:32px;height:32px;color:var(--ink);cursor:pointer;background:0 0;border:1px solid #0000;border-radius:50%;place-items:center;display:inline-grid}.word-favorite.active{color:var(--brand);background:#ffe8ef}.word-favorite:disabled{cursor:not-allowed;opacity:.45}.word-sheet h2{margin:0;font-size:22px}.word-pronounce{color:var(--soft);justify-content:space-between;align-items:center;gap:12px;padding:16px 20px;display:flex}.word-pronounce button{min-width:0;color:inherit;font:inherit;cursor:pointer;background:0 0;border:0;align-items:center;gap:8px;display:inline-flex}.word-pronounce button strong{color:var(--ink);font-weight:600}.uk-phonetic{color:#555;font-weight:600}.kind-chip{border-radius:999px;padding:4px 10px}.kind-chip.key{color:#b5124b;background:#ffe8ef}.kind-chip.new{color:#a45600;background:#fff0d6}.kind-chip.common{color:#087348;background:#e4f6ee}.word-definition{background:#fff;border-radius:8px;gap:10px;margin:0 14px 18px;padding:18px;display:grid;box-shadow:0 2px 12px #00000014}.word-definition span,.word-definition p{color:var(--soft);margin:0}.word-sheet footer{border-top:1px solid var(--line);justify-content:space-between;gap:12px;padding:16px 20px;display:flex}.word-sheet footer button{font:inherit;background:0 0;border:0}.word-levels{gap:8px;display:flex}.word-levels span{color:#fff;background:#637083;border-radius:999px;place-items:center;width:20px;height:20px;font-size:12px;display:grid}.highlight-word{font:inherit;cursor:pointer;border:0;border-radius:5px;padding:1px 4px;display:inline}.highlight-word.key{color:#b4144d;background:#fde8ef}.highlight-word.new{color:#b86422;background:#fff0df}.highlight-word.common{color:#2a7659;background:#e7f6f0}.caption-list{scrollbar-color:#1818182e transparent;scrollbar-width:thin;background:0 0;gap:0;min-width:0;height:100%;min-height:0;padding:6px 10px 16px 0;display:grid;position:relative;overflow:auto}.caption-list.hidden{cursor:pointer;-webkit-user-select:none;user-select:none}.caption-list.hidden .caption-row{filter:blur(8px);opacity:.36;pointer-events:none}.caption-list.hidden:after{content:"";z-index:2;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px);pointer-events:none;background:#f7f7f56b;grid-area:1/1/-1;min-height:calc(100svh - 170px);margin-top:calc(-100svh + 170px);display:block;position:sticky;inset:0}.caption-hidden-message{z-index:3;color:#202020;pointer-events:none;place-items:center;gap:6px;font-size:15px;display:grid;position:sticky;top:42%}.caption-hidden-message strong{font-size:16px}.caption-list::-webkit-scrollbar{width:5px}.caption-list::-webkit-scrollbar-track{background:0 0}.caption-list::-webkit-scrollbar-thumb{background:#18181829;border-radius:999px}.caption-list::-webkit-scrollbar-thumb:hover{background:#18181842}.caption-row{text-align:left;cursor:pointer;background:0 0;border-width:0 0 1px;border-radius:0;gap:10px;padding:17px 18px 16px;transition:background .18s,box-shadow .18s,transform .18s;display:grid}.caption-row.active{z-index:1;background:#fff;border:0;border-radius:13px;margin:11px 4px 11px 0;position:relative;box-shadow:0 2px 5px #1414141f,0 0 0 1px #14141408}.caption-row.dictation-caption-row{gap:8px;padding-top:14px}.caption-row.cloze-caption-row{gap:12px}.caption-row.reading-caption-row{padding:13px 12px 13px 0}.caption-row.reading-caption-row.active{box-shadow:none;background:0 0;border-bottom:1px solid #0000000f;border-radius:0;margin:0}.reading-line{grid-template-columns:28px minmax(0,1fr) 28px;align-items:start;gap:12px;display:grid}.reading-line .reading-index{color:#9a9a9a;font-size:14px;line-height:1.7}.reading-line p,.reading-line .reading-text{color:var(--ink);margin:0;font-size:18px;line-height:1.65}.reading-line .reading-text span,.reading-line .reading-text .highlight-word,.reading-line .reading-translation span,.reading-line .reading-translation .highlight-word{vertical-align:baseline;display:inline}.reading-line p+p,.reading-line .reading-translation{color:#555;font-size:15px;line-height:1.5}.reading-line .reading-toggle{color:#777;background:0 0;border:0;place-items:center;padding:4px;display:grid}.dictation-preview{grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:12px;display:grid}.dictation-preview span{color:#4c4c4c;background:#fff;border-radius:8px;min-height:34px;padding:8px 14px;line-height:1.2;display:block}.dictation-preview button{color:var(--ink);background:0 0;border:0;padding:0}.caption-row.active .dictation-preview span{background:#fff}.caption-row.active>p{font-weight:600}.caption-row.active>p:last-child{font-weight:500}.caption-row>p{color:#4f4f4f;margin:0;font-size:17px;line-height:1.55}.caption-english{gap:8px;display:grid}.caption-english p{color:#4f4f4f;margin:0;font-size:17px;line-height:1.55}.caption-row.active .caption-english p{color:var(--ink);font-weight:600}.caption-row .sentence-phonetic{color:#a4a4a4;font-size:14px}.caption-row.active .sentence-phonetic{color:#8c8c8c}.caption-row>p:last-child{color:#a7a7a7;font-size:14px}.caption-row>.caption-primary{color:var(--ink);font-size:17px}.caption-row.cloze-caption-row>.caption-primary{color:var(--ink);font-weight:400}.cloze-blank{vertical-align:-5px;color:#0000;width:104px;height:24px;font:inherit;cursor:pointer;border:0;border-radius:4px;margin:0 4px;padding:1px 5px;display:inline-block}.cloze-blank.key{background:#fde8ef}.cloze-blank.new{background:#e7edff}.cloze-blank.common{background:#ecffd5}.cloze-blank.revealed{width:auto;min-width:0;color:inherit;vertical-align:baseline}.cloze-blank.key.revealed{color:#b4144d}.cloze-blank.new.revealed{color:#5f67c7}.cloze-blank.common.revealed{color:#2a7659}.caption-actions{color:#9a9a9a;border-top:1px solid #0000000d;justify-content:flex-start;margin-top:2px;padding-top:10px;font-size:12px}.caption-actions span,.caption-actions small{font-size:12px;font-weight:400}.caption-row:not(.active) .caption-actions{border-top-color:#0000}.caption-actions svg{color:#b1b1b1;flex:none}.caption-icon-button{color:#b1b1b1;background:0 0;border:0;place-items:center;padding:0;display:inline-grid}.caption-icon-button:hover svg{color:var(--ink)}.caption-icon-button.active svg{color:var(--brand)}.caption-icon-button.recording-remove svg{color:#d45265}.caption-actions .caption-favorite.active,.caption-actions .caption-favorite.active svg{color:var(--brand)}.caption-action-spacer{flex:auto}.sentence-play{border:1px solid var(--line);width:28px;height:28px;color:var(--ink);cursor:pointer;background:#fff;border-radius:999px;place-items:center;display:inline-grid}.sentence-play:hover{background:var(--brand);color:#fff}.sentence-play:hover svg{color:#fff;stroke:#fff}.dictation-row{gap:10px;display:grid}.dictation-row p{color:var(--soft);margin:0;font-size:15px}.dictation-row textarea{resize:vertical;min-height:84px}.dictation-focus-panel{align-content:start;gap:12px}.dictation-focus-panel textarea{min-height:58px;max-height:92px;box-shadow:none;resize:vertical;color:var(--ink);background:#f4f4f4;border:0;border-radius:10px;font-size:16px}.dictation-focus-panel p{color:#3f3f3f;margin:0;font-size:16px;line-height:1.55}.dictation-focus-panel button{color:#fff;background:#181818;border:0;border-radius:8px;justify-self:center;margin-top:8px;padding:11px 25px;font-weight:700}.cloze-focus-panel{align-content:center;gap:18px;min-height:100%;display:grid;position:relative}.cloze-focus-panel.hidden{cursor:pointer;background:#ffffffb8;border-radius:8px;min-height:210px}.cloze-focus-panel.revealed{align-content:center}.cloze-focus-panel .focus-hidden-message{color:#202020;place-items:center;gap:7px;font-size:15px;display:grid}.cloze-focus-panel .focus-hidden-message strong{font-size:16px}.cloze-focus-panel>button{color:#fff;background:#181818;border:0;border-radius:8px;justify-self:center;padding:11px 26px;font-weight:700}.note-backdrop{z-index:90;-webkit-backdrop-filter:blur(9px);backdrop-filter:blur(9px);background:#16161647;place-items:end center;padding:18px 18px clamp(24px,3vh,42px);display:grid;position:fixed;inset:0}.note-modal{background:#fff;border-radius:18px 18px 0 0;gap:13px;width:min(576px,100vw - 36px);padding:54px 24px 22px;display:grid;position:relative;box-shadow:0 18px 54px #0003}.note-modal-bar{background:#dedede;border-radius:999px;width:46px;height:4px;position:absolute;top:22px;left:50%;transform:translate(-50%)}.note-close{color:var(--ink);background:0 0;border:0;font-size:25px;line-height:1;position:absolute;top:18px;right:20px}.note-modal h2{margin:0 0 6px;font-size:19px;line-height:1.2}.note-source{border:1px solid var(--line);border-radius:8px;gap:10px;padding:16px;display:grid}.note-source p{margin:0;line-height:1.55}.note-source p:last-child{color:var(--soft)}.note-modal label{color:var(--muted);gap:9px;font-size:13px;display:grid}.note-modal textarea{resize:vertical;min-height:98px}.learning-error{color:#a52339;overflow-wrap:anywhere;font-size:14px;line-height:1.6}.review-status{border-bottom:1px solid #e5e5e0;flex-wrap:wrap;align-items:center;gap:12px;margin-bottom:16px;padding:12px 0;font-size:14px;display:flex}.review-status button{color:#252525;background:#fff;border:1px solid #d9dce2;border-radius:6px;justify-content:center;align-items:center;min-width:36px;height:36px;display:inline-flex}.note-modal{max-height:calc(100dvh - 32px);overflow-y:auto}.practice-word-slot input{max-width:calc(100vw - 80px)}.note-modal footer{grid-template-columns:1fr 1fr;gap:14px;margin-top:8px;display:grid}.note-modal footer button{background:#f1f1ef;border:0;border-radius:8px;padding:13px 16px;font-weight:700}.note-modal footer button:last-child{color:#fff;background:#8eaff4}.note-modal footer button:last-child.has-content{background:#4f82e8}.narrow-page,.methods-page,.profile-page{max-width:1120px}.search-box{border:1px solid var(--line);background:#fff;border-radius:8px;grid-template-columns:auto 1fr auto;align-items:center;gap:12px;padding:8px 8px 8px 16px;display:grid}.search-box input{box-shadow:none;border:0;padding:13px 0}.search-box button,.upload-box button,.success-button{background:var(--brand);color:#fff;border:0;border-radius:8px;padding:13px 20px;font-weight:700}.result-count{color:var(--muted);text-align:center;margin:28px 0}.result-list{gap:22px;display:grid}.result-list button{border-bottom:1px solid var(--line);text-align:left;gap:8px;padding:0 0 22px;display:grid}.result-list p{margin:0}.result-list p:first-child{font-size:19px}.result-list p:nth-child(2),.result-list span{color:var(--soft)}.page-heading{margin-bottom:26px}.page-heading.compact h1{font-size:clamp(28px,4vw,44px)}.method-grid{gap:16px;display:grid}.method-grid article{padding:22px}.method-grid h2{margin:0 0 10px;font-size:24px}.method-grid p,.method-grid span,.method-grid li{color:var(--soft)}.method-grid ol{margin:16px 0 0;padding-left:22px}.profile-page{gap:20px;display:grid}.profile-card{gap:18px;padding:24px;display:grid}.danger-button{color:#fff;background:#e90917;border:0;border-radius:8px;padding:14px 20px;font-weight:700}.success-button{background:#09a844}.success-button:disabled{cursor:not-allowed;opacity:.58}.form-notice{color:var(--soft);margin:0}.admin-layout{gap:22px;display:grid}.admin-sidebar{align-content:start;gap:10px;padding:18px;display:grid}.admin-brand{align-items:center;gap:12px;margin-bottom:14px;display:flex}.admin-brand span{color:var(--muted);font-size:13px;display:block}.admin-sidebar button{color:var(--soft);background:0 0;border:0;border-radius:8px;align-items:center;gap:10px;padding:12px;display:flex}.admin-sidebar button:first-of-type,.admin-sidebar button:hover{background:var(--brand);color:#fff}.admin-main{min-width:0}.workflow-grid{gap:12px;margin-bottom:22px;display:grid}.workflow-grid article{gap:6px;padding:18px;display:grid;position:relative}.workflow-grid article>span{color:#1769c2;background:#eff6ff;border-radius:999px;place-items:center;width:32px;height:32px;font-weight:700;display:grid}.workflow-grid p{color:var(--soft);margin:0}.workflow-grid em{color:var(--muted);font-size:13px;font-style:normal;position:absolute;top:18px;right:18px}.admin-editor{gap:18px;display:grid}.upload-box{text-align:center;place-items:center;padding:34px 20px;display:grid}.upload-box p{max-width:440px;color:var(--soft)}.review-table{border:1px solid var(--line);background:#fff;border-radius:8px;overflow:auto}.table-head,.table-row{grid-template-columns:90px 1.4fr 1.2fr 1fr;min-width:780px;display:grid}.table-head{color:var(--muted);background:#f1f1ef;font-weight:700}.table-head span,.table-row span{border-bottom:1px solid var(--line);padding:14px}.table-row span{color:var(--soft)}.mobile-nav{z-index:30;border:1px solid var(--line);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);background:#ffffffe6;border-radius:8px;grid-template-columns:repeat(4,1fr);display:grid;position:fixed;bottom:12px;left:12px;right:12px;box-shadow:0 18px 45px #00000024}.mobile-nav button{min-height:58px;color:var(--muted);place-items:center;gap:3px;font-size:12px;display:grid}.mobile-nav button.active{color:var(--brand);font-weight:700}@media (width>=680px){.workflow-grid,.method-grid,.profile-page{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (width>=980px){.app-shell{padding-bottom:0}.learn-layout{grid-template-rows:auto auto minmax(0,1fr);height:100svh;display:grid;overflow:hidden}.desktop-nav{display:flex}.mobile-nav{display:none}.home-layout{grid-template-columns:clamp(270px,22vw,320px) minmax(0,1fr);align-items:start}.study-panel{max-height:calc(100svh - 110px);padding-right:4px;position:sticky;top:94px;overflow:auto}.learning-workspace{grid-template-columns:minmax(420px,.99fr) minmax(440px,1.01fr);align-items:stretch}.player-column{position:relative}.admin-layout{grid-template-columns:250px 1fr}.admin-sidebar{position:sticky;top:96px}}@media (width>=1240px){.workflow-grid{grid-template-columns:repeat(5,minmax(0,1fr))}}@media (width>=1560px){.home-layout{grid-template-columns:clamp(300px,17vw,320px) minmax(0,1fr)}}@media (width<=480px){.learn-layout{height:auto;display:block;overflow:visible}.learning-workspace,.player-column{display:grid;overflow:visible}.topbar{padding:14px}.brand-mark{width:38px;height:38px}.brand strong{font-size:16px}.brand small{white-space:nowrap;text-overflow:ellipsis;max-width:180px;overflow:hidden}.page{padding:14px}.metric-stack{gap:10px}.metric{grid-template-columns:40px minmax(0,1fr) auto;padding:14px}.field-grid{grid-template-columns:1fr}.lab-sidebar-head,.filter-panel,.profile-card{padding:18px}.focus-card{height:auto;max-height:60svh}.search-box{grid-template-columns:auto 1fr}.search-box button{grid-column:1/-1}}.back-link{color:var(--muted);cursor:pointer;background:0 0;border:0;padding:8px 0;font-size:14px}.back-link:hover{color:var(--brand)}.auth-page{flex-direction:column;align-items:center;padding-top:40px;display:flex}.auth-card{border:1px solid var(--line);background:#fff;border-radius:12px;width:min(400px,100%);padding:32px}.auth-brand{color:var(--brand);margin:0 0 8px;font-weight:700;line-height:1.5}.auth-tagline{color:var(--muted);margin:0 0 24px;font-size:13px}.auth-card h1{margin:0 0 24px;font-size:24px}.auth-tabs{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;margin-bottom:18px;display:grid}.auth-tabs button{border:1px solid var(--line);color:var(--muted);cursor:pointer;font:inherit;background:#fff;border-radius:999px;padding:9px 10px;font-size:13px}.auth-tabs button.active{background:var(--brand);border-color:var(--brand);color:#fff}.auth-card label{color:var(--muted);margin-bottom:16px;font-size:13px;display:block}.auth-card input{border:1px solid var(--line);background:#fafaf8;border-radius:8px;width:100%;margin-top:6px;padding:10px 12px;font-size:15px;display:block}.password-input-row{grid-template-columns:minmax(0,1fr) 42px;align-items:center;margin-top:6px;display:grid}.password-input-row input{grid-area:1/1/auto/-1;margin-top:0;padding-right:46px}.password-input-row button{width:42px;height:42px;color:var(--muted);cursor:pointer;background:0 0;border:0;grid-area:1/2;place-items:center;display:grid}.sms-code-row{grid-template-columns:minmax(0,1fr) auto;align-items:end;gap:8px;display:grid}.sms-code-row button{border:1px solid var(--brand);color:var(--brand);cursor:pointer;font:inherit;background:#fff;border-radius:8px;align-self:end;min-width:104px;padding:10px;font-size:13px;font-weight:700}.sms-code-row button:disabled{cursor:not-allowed;opacity:.55}.content-category-tabs::-webkit-scrollbar{display:none}.content-category-tabs button:hover{border-color:#c9182b52;transform:translateY(-1px);box-shadow:0 8px 18px #00000014}.content-category-tabs button.active span{background:#ffffff2e}.auth-card>button[type=button]{background:var(--brand);color:#fff;cursor:pointer;border:0;border-radius:8px;width:100%;margin-top:8px;padding:12px;font-size:15px;font-weight:600}.auth-card>button:disabled{opacity:.6;cursor:not-allowed}.auth-error{color:var(--brand);margin:8px 0;font-size:13px}.auth-switch{text-align:center;color:var(--muted);margin-top:16px;font-size:13px}.auth-switch button{color:var(--brand);cursor:pointer;background:0 0;border:0;font-weight:600;text-decoration:underline}.campaign-auth-hint{color:var(--muted);margin:-4px 0 14px;font-size:13px;line-height:1.6}.consent-row{color:var(--soft);grid-template-columns:none;align-items:flex-start;gap:10px;font-size:13px;line-height:1.55;display:flex}.consent-row input{flex:none;width:18px;height:18px;margin-top:2px}.edu-coupon-page{width:min(980px,100%);margin:0 auto;padding:clamp(18px,4vw,52px)}.edu-hero{border:1px solid var(--line);background:#fff;border-radius:8px;gap:16px;padding:clamp(28px,6vw,64px);display:grid;box-shadow:0 24px 70px #00000012}.edu-hero p,.edu-hero h1,.edu-hero span{margin:0}.edu-hero p{color:var(--brand);font-weight:800}.edu-hero h1{font-size:clamp(42px,9vw,92px);line-height:.95}.edu-hero strong{color:var(--brand);font-size:clamp(28px,6vw,58px)}.edu-hero span{max-width:620px;color:var(--soft);font-size:17px;line-height:1.7}.edu-hero button{background:var(--brand);color:#fff;cursor:pointer;border:0;border-radius:8px;justify-self:start;padding:14px 30px;font-size:18px;font-weight:800}.edu-hero em{color:var(--brand);font-style:normal}.edu-claim-card{border:1px solid var(--brand-line);background:var(--brand-soft);border-radius:8px;gap:12px;width:min(520px,100%);padding:18px;display:grid}.edu-claim-card>strong{font-size:16px}.edu-claim-card label{color:var(--soft);font-size:13px}.edu-claim-card .consent-row{color:var(--soft)}.edu-claim-card button{justify-self:stretch}.edu-benefits{grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:14px;margin-top:18px;display:grid}.edu-benefits article,.edu-rules{border:1px solid var(--line);background:#fff;border-radius:8px;padding:18px}.edu-benefits strong,.edu-benefits span{display:block}.edu-benefits span,.edu-rules p{color:var(--muted);line-height:1.7}.edu-rules{margin-top:18px}.edu-rules h2,.edu-rules p{margin:0 0 8px}.subscription-page h1{margin-bottom:8px;font-size:28px}.sub-desc{color:var(--muted);margin-bottom:24px}.current-subscription,.subscription-status-card{border:1px solid var(--line);background:#fff;border-radius:10px;gap:6px;padding:14px 16px;display:grid}.current-subscription{margin:0 0 20px}.current-subscription.active,.subscription-status-card.active{background:#f4fbf6;border-color:#cde8d5}.current-subscription strong,.subscription-status-card strong{color:var(--ink);font-size:15px}.current-subscription span,.subscription-status-card span{color:var(--muted);font-size:13px;line-height:1.5}.current-subscription em{color:#0a7c2d;font-size:12px;font-style:normal;font-weight:700}.plan-grid{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;margin-bottom:20px;display:grid}.plan-card{border:2px solid var(--line);text-align:center;background:#fff;border-radius:12px;padding:24px;transition:border-color .15s;position:relative}.plan-card.current{background:#f4fbf6;border-color:#0a7c2d}.plan-card.selected{border-color:var(--brand);box-shadow:0 0 0 3px #c9182b14}.plan-card:hover{border-color:var(--brand)}.plan-card h2{margin:0 0 12px;font-size:18px}.plan-coupon-badge{background:var(--brand-soft);max-width:100%;color:var(--brand);border-radius:999px;justify-content:center;align-items:center;margin:-8px 0 12px;padding:6px 10px;font-size:12px;font-weight:700;line-height:1.35;display:inline-flex}.plan-price{flex-wrap:wrap;justify-content:center;align-items:baseline;gap:7px;margin-bottom:12px;display:flex}.plan-price del{color:var(--muted);-webkit-text-decoration-color:var(--brand);text-decoration-color:var(--brand);font-size:14px}.plan-price strong{font-size:32px}.plan-price span{color:var(--muted);font-size:14px}.plan-card p{color:var(--muted);font-size:13px}.plan-pay-btn{background:var(--brand);color:#fff;cursor:pointer;border:0;border-radius:8px;width:100%;margin-top:12px;padding:10px;font-size:14px;font-weight:600;transition:background .15s}.plan-pay-btn:hover{background:var(--brand-dark)}.plan-pay-btn:disabled{opacity:.6;cursor:not-allowed}.coupon-checkout,.coupon-claim-box{border:1px solid var(--line);background:#fff;border-radius:8px;gap:16px;margin-bottom:20px;padding:22px;display:grid}.coupon-checkout h2,.coupon-claim-box h2{margin:0;font-size:19px}.coupon-options{gap:10px;display:grid}.coupon-options label{border:1px solid var(--line);cursor:pointer;border-radius:8px;grid-template-columns:none;align-items:center;gap:12px;padding:12px;display:flex}.coupon-options label.selected{border-color:var(--brand);background:var(--brand-soft)}.coupon-options input{flex:none;width:18px;height:18px}.coupon-options span{gap:3px;display:grid}.coupon-options small{color:var(--muted)}.coupon-select-row{color:var(--ink);gap:8px;font-size:14px;font-weight:700;display:grid}.coupon-select-row select{border:1px solid var(--line);width:100%;min-height:44px;color:var(--ink);background:#fafaf8;border-radius:8px;padding:0 12px;font-size:15px}.coupon-code-row{gap:8px;display:flex}.coupon-code-row input{flex:1}.coupon-code-row button,.checkout-summary button{background:var(--brand);color:#fff;border:0;border-radius:8px;padding:10px 18px;font-weight:700}.checkout-summary{border-top:1px solid var(--line);color:var(--muted);grid-template-columns:repeat(4,auto) 1fr;align-items:center;gap:14px;padding-top:16px;display:grid}.checkout-summary strong{color:var(--brand);font-size:20px}.checkout-summary button{justify-self:end}.coupon-reminder-banner{background:linear-gradient(135deg,#fff6f7 0%,#fff 72%);border:1px solid #c9182b38;border-radius:14px;grid-template-columns:minmax(0,1fr) auto auto;align-items:center;gap:12px;width:min(1120px,100% - 32px);margin:14px auto 0;padding:12px 14px 12px 18px;display:grid;box-shadow:0 14px 34px #c9182b14}.coupon-reminder-banner div{gap:3px;min-width:0;display:grid}.coupon-reminder-banner strong{color:var(--brand);font-size:15px}.coupon-reminder-banner span{color:var(--text);font-size:13px;line-height:1.5}.coupon-reminder-banner button{cursor:pointer;border:0;border-radius:999px;font-weight:700}.coupon-reminder-banner button:first-of-type{background:var(--brand);color:#fff;padding:9px 15px}.coupon-reminder-banner button:nth-of-type(2){width:34px;height:34px;color:var(--muted);border:1px solid var(--line);background:#fff;font-size:18px}.redeem-section{border:1px solid var(--line);background:#fff;border-radius:12px;padding:24px}.redeem-section h2{margin:0 0 8px;font-size:18px}.redeem-section>p{color:var(--muted);margin-bottom:16px;font-size:13px}.redeem-input{gap:8px;display:flex}.redeem-input input{border:1px solid var(--line);background:#fafaf8;border-radius:8px;flex:1;padding:10px 12px;font-size:15px}.redeem-input button{background:var(--brand);color:#fff;cursor:pointer;border:0;border-radius:8px;padding:10px 20px;font-size:15px;font-weight:600}.redeem-input button:disabled{opacity:.6;cursor:not-allowed}.redeem-message{margin-top:12px;font-size:14px}.required-label{align-items:center;gap:4px;display:inline-flex}.required-label em,.consent-row em{color:var(--brand);font-style:normal;font-weight:800}.subscribe-banner{background:linear-gradient(135deg, var(--brand), var(--brand-dark));color:#fff;border-radius:12px;margin-top:16px;padding:20px}.subscribe-banner.active{background:var(--brand-soft);border:1px solid var(--brand-line);color:var(--ink)}.subscribe-banner strong{margin-bottom:4px;font-size:18px;display:block}.subscribe-banner p{color:#ffffffb3;margin-bottom:12px;font-size:13px}.subscribe-banner.active p{color:#8a2f39}.subscribe-banner button{color:var(--brand);cursor:pointer;background:#fff;border:0;border-radius:8px;padding:10px 20px;font-size:14px;font-weight:600}.subscribe-banner.active button{background:var(--brand);color:#fff}.favorites-page h1{margin-bottom:16px;font-size:28px}.favorites-page h2{margin:20px 0 10px;font-size:18px}.empty-hint{color:var(--muted);text-align:center;padding:40px 0}.library-tabs{border-bottom:1px solid var(--line);gap:8px;margin-bottom:18px;display:flex}.library-tabs button{color:var(--muted);background:0 0;border:0;border-bottom:2px solid #0000;align-items:center;gap:6px;padding:9px 12px;font-size:14px;font-weight:800;display:inline-flex}.library-tabs button.active{border-bottom-color:var(--brand);color:var(--brand)}.library-tabs button strong{min-width:20px;color:var(--muted);text-align:center;background:#f1f1f1;border-radius:999px;padding:2px 6px;font-size:11px}.library-tabs button.active strong{color:var(--brand);background:#fff0f2}.favorites-list{flex-direction:column;gap:8px;display:flex}.favorite-item{text-align:left;border:1px solid var(--line);cursor:pointer;background:#fff;border-radius:10px;width:100%;padding:14px 16px;transition:border-color .15s;display:block}.favorite-item:hover{border-color:var(--brand)}.favorite-item:disabled{cursor:not-allowed;opacity:.56}.favorite-item strong{margin-bottom:4px;font-size:15px;display:block}.favorite-item p{color:var(--muted);margin:0 0 4px;font-size:13px}.favorite-item span{color:#999;font-size:12px}.note-favorite-item{border-left:3px solid var(--brand)}.note-favorite-item p{color:var(--ink);line-height:1.65}.word-favorite-item{cursor:pointer}.word-favorite-item strong{color:var(--ink)}.transcript-backdrop{z-index:80;background:#1717175c;place-items:center;padding:18px;display:grid;position:fixed;inset:0}.transcript-modal{border:1px solid var(--line);background:#fff;border-radius:12px;grid-template-rows:auto auto 1fr;width:min(860px,100%);max-height:min(82vh,760px);display:grid;overflow:hidden}.transcript-modal header,.transcript-actions{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;gap:12px;padding:14px 18px;display:flex}.transcript-modal header p,.transcript-modal header h2{margin:0}.transcript-modal header p{color:var(--muted);font-size:13px}.transcript-modal header button,.transcript-actions button{border:1px solid var(--line);cursor:pointer;background:#fff;border-radius:8px;padding:8px 12px}.transcript-actions{justify-content:flex-start}.transcript-actions button.active,.transcript-actions button:last-child{background:var(--brand);color:#fff}.transcript-preview{padding:8px 18px 18px;overflow:auto}.transcript-preview section{border-bottom:1px solid var(--line);padding:12px 0}.transcript-preview p{margin:4px 0;line-height:1.65}.redeem-page h1{margin-bottom:8px;font-size:28px}.redeem-page>p{color:var(--muted);margin-bottom:20px}.coupons-page h1{font-size:28px}.coupon-claim-box p{color:var(--muted);margin:0}.my-coupon-list{gap:12px;display:grid}.my-coupon{border:1px solid var(--line);border-left:5px solid var(--brand);background:#fff;border-radius:8px;grid-template-columns:120px minmax(0,1fr) auto;align-items:center;gap:18px;padding:18px;display:grid}.my-coupon>div:first-child{color:var(--brand);display:grid}.my-coupon>div:first-child strong{font-size:28px}.my-coupon>div:first-child span{font-size:12px}.my-coupon h2,.my-coupon p{margin:0}.my-coupon h2{font-size:17px}.my-coupon p{color:var(--muted);margin-top:4px;font-size:13px}.my-coupon em{background:var(--brand-soft);color:var(--brand);border-radius:999px;padding:5px 10px;font-size:12px;font-style:normal;font-weight:700}.my-coupon.used,.my-coupon.expired,.my-coupon.revoked{opacity:.58;border-left-color:#aaa}@media (width<=680px){.coupon-code-row{flex-direction:column}.checkout-summary{grid-template-columns:1fr 1fr}.checkout-summary button{grid-column:1/-1;width:100%}.coupon-reminder-banner{grid-template-columns:minmax(0,1fr) auto;width:calc(100% - 24px)}.coupon-reminder-banner button:first-of-type{grid-column:1/-1}.coupon-reminder-banner button:nth-of-type(2){grid-area:1/2}.my-coupon{grid-template-columns:90px minmax(0,1fr)}.my-coupon em{grid-column:1/-1;justify-self:start}}.profile-actions{flex-direction:column;gap:8px;margin-top:16px;display:flex}.profile-actions button{border:1px solid var(--line);cursor:pointer;text-align:left;background:#fff;border-radius:8px;padding:10px 16px;font-size:14px}.profile-actions button:hover{border-color:var(--brand)}.profile-actions .danger-button{color:var(--brand);border-color:var(--brand-line)}.metric.clickable{cursor:pointer;transition:transform .1s}.metric.clickable:hover{transform:translateY(-1px)}.order-confirm-page{padding-bottom:24px}.order-confirm-page>h1{letter-spacing:-.5px;margin:0 0 20px;font-size:26px;font-weight:800}.oc-plan-card{border:2px solid var(--brand);background:linear-gradient(135deg,#fff 0%,#fafaf8 100%);border-radius:14px;align-items:center;gap:16px;margin-bottom:16px;padding:20px;display:flex;position:relative;overflow:hidden}.oc-plan-card:before{content:"";background:var(--brand);border-radius:4px 0 0 4px;width:4px;height:100%;position:absolute;top:0;left:0}.oc-plan-icon{background:var(--brand-soft);border-radius:14px;flex-shrink:0;justify-content:center;align-items:center;width:52px;height:52px;display:flex}.oc-plan-icon svg{color:var(--brand)}.oc-plan-info{flex:1;min-width:0}.oc-plan-info h2{color:var(--ink);margin:0 0 4px;font-size:18px;font-weight:700}.oc-plan-info p{color:var(--muted);margin:0;font-size:13px;line-height:1.4}.oc-plan-price{text-align:right;flex-shrink:0}.oc-plan-price del{color:var(--muted);-webkit-text-decoration-color:var(--brand);text-decoration-color:var(--brand);margin-bottom:2px;font-size:13px;display:block}.oc-plan-price strong{color:var(--brand);font-size:28px;font-weight:800}.oc-plan-price span{color:var(--muted);font-size:13px}@media (width<=480px){.oc-plan-card{flex-wrap:wrap}.oc-plan-price{text-align:left;width:100%;margin-top:4px;padding-left:68px}}.oc-coupon-section{border:1px solid var(--line);background:#fff;border-radius:14px;margin-bottom:16px;padding:20px}.oc-coupon-section h3{align-items:center;gap:8px;margin:0 0 14px;font-size:16px;font-weight:700;display:flex}.oc-coupon-section h3 svg{color:var(--brand);flex-shrink:0}.oc-coupon-select{border:1.5px solid var(--line-strong);width:100%;min-height:48px;color:var(--ink);appearance:none;background:#fafaf8 url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%23777' viewBox='0 0 16 16'%3E%3Cpath d='M4.5 6l3.5 4 3.5-4z'/%3E%3C/svg%3E") right 12px center no-repeat;border-radius:10px;margin-bottom:12px;padding:0 36px 0 14px;font-size:15px;transition:border-color .15s}.oc-coupon-select:focus{border-color:var(--brand);outline:none;box-shadow:0 0 0 3px #c9182b14}.oc-coupon-divider{color:var(--muted);align-items:center;gap:12px;margin:14px 0;font-size:12px;display:flex}.oc-coupon-divider:before,.oc-coupon-divider:after{content:"";background:var(--line);flex:1;height:1px}.oc-coupon-input-row{gap:8px;display:flex}.oc-coupon-input-row input{border:1.5px solid var(--line-strong);text-transform:uppercase;letter-spacing:1px;border-radius:10px;flex:1;min-height:44px;padding:0 14px;font-size:15px;transition:border-color .15s}.oc-coupon-input-row input:focus{border-color:var(--brand);outline:none;box-shadow:0 0 0 3px #c9182b14}.oc-coupon-input-row button{background:var(--ink);color:#fff;border:0;border-radius:10px;flex-shrink:0;min-width:72px;padding:0 18px;font-size:14px;font-weight:600;transition:background .15s}.oc-coupon-input-row button:hover{background:#333}.oc-coupon-input-row button:disabled{opacity:.5;cursor:not-allowed}.oc-coupon-msg{color:var(--muted);margin:10px 0 0;font-size:13px}.oc-coupon-msg.success{color:#0a7c2d}.oc-coupon-msg.error{color:var(--brand)}.oc-empty-hint{color:var(--muted);text-align:center;background:#fafaf8;border-radius:8px;margin:0 0 12px;padding:12px;font-size:13px}.oc-price-breakdown{border:1px solid var(--line);background:#fff;border-radius:14px;margin-bottom:8px;padding:20px}.oc-price-breakdown h3{align-items:center;gap:8px;margin:0 0 14px;font-size:16px;font-weight:700;display:flex}.oc-price-breakdown h3 svg{color:var(--brand);flex-shrink:0}.oc-price-row{color:var(--ink);justify-content:space-between;align-items:center;padding:10px 0;font-size:14px;display:flex}.oc-price-row:not(:last-child){border-bottom:1px solid var(--line)}.oc-price-row.sub{color:var(--muted);font-size:13px}.oc-price-row.discount{color:#0a7c2d}.oc-price-row.discount span:last-child{font-weight:600}.oc-price-row.total{border-top:2px solid var(--ink);border-bottom:0;margin-top:4px;padding-top:14px}.oc-price-row.total span:first-child{font-size:15px;font-weight:600}.oc-price-row.total strong{color:var(--brand);font-size:26px;font-weight:800}.oc-price-row del{color:var(--muted);-webkit-text-decoration-color:var(--brand);text-decoration-color:var(--brand);margin-left:4px;font-size:13px}.oc-pay-bar{border:1px solid var(--line);background:#fff;border-radius:14px;justify-content:space-between;align-items:center;gap:16px;margin-top:16px;padding:20px;display:flex}.oc-pay-bar .oc-pay-total{flex-direction:column;gap:2px;display:flex}.oc-pay-bar .oc-pay-total span{color:var(--muted);font-size:12px}.oc-pay-bar .oc-pay-total strong{color:var(--brand);font-size:24px;font-weight:800}.oc-pay-bar button{background:linear-gradient(135deg, var(--brand) 0%, var(--brand-dark) 100%);color:#fff;cursor:pointer;border:0;border-radius:12px;flex-shrink:0;min-width:160px;min-height:50px;font-size:16px;font-weight:700;transition:transform .1s,box-shadow .15s;box-shadow:0 6px 20px #c9182b40}.oc-pay-bar button:hover{transform:translateY(-1px);box-shadow:0 8px 28px #c9182b59}.oc-pay-bar button:active{transform:translateY(0)}.oc-pay-bar button:disabled{opacity:.6;cursor:not-allowed;box-shadow:none;transform:none}.oc-pay-btn{background:linear-gradient(135deg, var(--brand) 0%, var(--brand-dark) 100%);color:#fff;cursor:pointer;border:0;border-radius:12px;width:100%;min-height:52px;margin-top:16px;font-size:17px;font-weight:700;transition:transform .1s,box-shadow .15s;display:block;box-shadow:0 6px 20px #c9182b40}.oc-pay-btn:hover{transform:translateY(-1px);box-shadow:0 8px 28px #c9182b59}.oc-pay-btn:active{transform:translateY(0)}.oc-pay-btn:disabled{opacity:.6;cursor:not-allowed;box-shadow:none;transform:none}@media (width<=480px){.oc-pay-btn{border-radius:14px;min-height:56px;margin-top:20px;font-size:18px}}.wechat-guide-overlay{z-index:100;background:#0000008c;justify-content:center;align-items:center;padding:20px;animation:.2s fadeIn;display:flex;position:fixed;inset:0}.wechat-guide-modal{text-align:center;background:#fff;border-radius:18px;width:100%;max-width:340px;padding:32px 24px 24px;animation:.25s slideUp;box-shadow:0 20px 60px #0003}.wechat-guide-icon{color:#07c160;background:#f0f9f0;border-radius:50%;justify-content:center;align-items:center;width:72px;height:72px;margin:0 auto 16px;display:flex}.wechat-guide-modal h3{color:var(--ink);margin:0 0 10px;font-size:20px;font-weight:800}.wechat-guide-modal p{color:var(--muted);margin:0 0 20px;font-size:14px;line-height:1.6}.wechat-guide-modal p strong{color:var(--ink)}.wechat-guide-steps{text-align:left;color:var(--ink);background:#fafaf8;border-radius:12px;gap:10px;margin-bottom:20px;padding:16px;font-size:14px;line-height:1.5;display:grid}.wechat-guide-steps span{background:var(--brand);color:#fff;vertical-align:middle;border-radius:50%;justify-content:center;align-items:center;width:22px;height:22px;margin-right:8px;font-size:12px;font-weight:700;display:inline-flex}.wechat-guide-modal button{color:#fff;cursor:pointer;background:#07c160;border:0;border-radius:12px;width:100%;min-height:48px;font-size:16px;font-weight:700}.wechat-guide-modal button:hover{background:#06ad56}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.orders-page>h1{margin:0 0 20px;font-size:26px;font-weight:800}.orders-page h2{color:var(--ink);margin:0 0 12px;font-size:17px;font-weight:700}.order-card{border:1px solid var(--line);background:#fff;border-radius:12px;margin-bottom:12px;padding:16px;transition:border-color .15s}.order-card.pending{border-left:4px solid #e6a700}.order-card-header{justify-content:space-between;align-items:center;margin-bottom:10px;display:flex}.order-card-header strong{color:var(--ink);font-size:16px}.status-badge{border-radius:999px;align-items:center;gap:4px;padding:4px 10px;font-size:12px;font-weight:700;display:inline-flex}.status-pending{color:#b8860b;background:#fff8e1}.status-paid{color:#2e7d32;background:#e8f5e9}.status-expired{color:#999;background:#f5f5f5}.order-card-body{color:var(--muted);gap:4px;margin-bottom:12px;font-size:13px;display:grid}.order-card-actions{border-top:1px solid var(--line);gap:8px;padding-top:12px;display:flex}.order-card-actions button{cursor:pointer;border-radius:8px;flex:1;min-height:40px;font-size:14px;font-weight:600;transition:background .15s}.order-card-actions .pay-btn{background:var(--brand);color:#fff;border:0}.order-card-actions .pay-btn:hover{background:var(--brand-dark)}.order-card-actions .cancel-btn{border:1.5px solid var(--line-strong);color:var(--muted);background:#fff}.order-card-actions .cancel-btn:hover{border-color:var(--brand);color:var(--brand)}.pending-orders-section,.history-orders-section{margin-bottom:24px}.empty-orders{text-align:center;color:var(--muted);padding:40px 20px}.empty-orders p{margin-bottom:16px}.empty-orders button{background:var(--brand);color:#fff;cursor:pointer;border:0;border-radius:10px;padding:12px 28px;font-size:15px;font-weight:600}@media (width<=760px){.app-shell:has(.learn-layout){min-height:100dvh;padding-bottom:0;overflow:hidden}.review-return-button{bottom:calc(92px + env(safe-area-inset-bottom,0px))}.learn-layout{grid-template-rows:auto auto minmax(0,1fr);height:100dvh;min-height:0;padding:10px 12px 0;display:grid;overflow:hidden}.learn-layout .learner-top{margin-bottom:8px}.learn-layout .learner-top h1{-webkit-line-clamp:1;-webkit-box-orient:vertical;font-size:16px;display:-webkit-box;overflow:hidden}.learn-layout .learn-mode-bar{justify-content:flex-start;gap:8px;min-width:0;margin:0 0 8px}.learn-layout .mode-tabs{justify-content:flex-start;width:100%}.learn-layout .learn-tools{flex:none}.learn-layout .learning-workspace{grid-template-rows:auto minmax(0,1fr);grid-template-columns:1fr;gap:10px;height:100%;min-height:0;overflow:hidden}.learn-layout .player-column{z-index:6;border-bottom:1px solid var(--line);background:#f5f5f3;grid-template-rows:auto auto;gap:8px;height:auto;min-height:0;padding-bottom:8px;position:relative;overflow:visible}.learn-layout .video-stage{border-radius:8px;max-height:28svh}.learn-layout .control-strip{min-height:58px;padding-bottom:2px}.learn-layout .focus-card{display:none}.learn-layout .caption-list{-webkit-overflow-scrolling:touch;overscroll-behavior:contain;height:100%;min-height:0;padding:4px 0 18px;overflow:auto}}
