/* 播放页内跟读、音轨选择及账号商店。 */
.platform-session-controls{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:12px;font-size:10px;color:var(--secondary)}.platform-session-controls.hidden{display:none}.platform-session-controls .text-button{white-space:nowrap}
.platform-qr svg{stroke:none;stroke-width:0;color:#000}.platform-qr svg path{fill:#000;stroke:none}.platform-qr svg rect{fill:#fff;stroke:none}
.platform-login-panel{margin-top:16px;padding:16px;border:1px solid var(--border);border-radius:10px;background:var(--field)}.platform-login-heading{display:flex;justify-content:space-between;align-items:center;gap:10px;font-size:12px}.platform-qr{width:200px;max-width:100%;margin:16px auto;background:white;border-radius:8px;overflow:hidden}.platform-qr:empty{display:none}.platform-qr svg{display:block;width:100%;height:auto}.media-tracks #bilibili-login-button{color:var(--accent);padding:7px 10px;border:1px solid var(--accent);border-radius:6px}
.media-tracks .track-hint{display:block;font-size:10px;line-height:1.7;margin-top:7px;overflow-wrap:anywhere}.media-tracks #platform-login-help{margin-top:10px;color:var(--accent)}.media-track-heading strong{margin-right:auto}
.reading-inline{position:relative;display:block;max-width:none;width:100%;margin:0;border:0;border-top:1px solid var(--border);border-radius:0;background:var(--surface);color:var(--ink);box-shadow:none;max-height:none;overflow:visible}
.reading-inline.hidden{display:none}.reading-inline .dialog-content{padding:26px}.reading-inline #reading-close{position:absolute;top:24px;right:24px;float:none;margin:0}.reading-inline h2{margin:10px 0}.reading-inline .recording-zone{position:relative;display:grid;grid-template-columns:70px 1fr;gap:6px 18px;align-items:center;padding:18px 0}.reading-inline .record-button{grid-row:1/4;margin:0}.reading-inline .record-meter{grid-column:2;grid-row:3;width:100%;max-width:260px;margin:0}.reading-inline .recording-zone strong,.reading-inline .recording-zone>span{grid-column:2}.reading-inline .recording-zone .quiet{grid-column:1/-1;margin:12px 0 0}.reading-inline .reading-reference{margin:18px 0 0}.reading-inline .reading-actions{justify-content:flex-start}.reading-inline .reading-privacy{margin-bottom:0}
.media-tracks{border-top:1px solid var(--border);padding:17px 22px;background:var(--surface);color:var(--ink)}.media-track-heading{display:flex;align-items:center;justify-content:space-between;gap:16px}.media-track-heading strong{font-size:12px}.media-tracks p{font-size:11px;color:var(--secondary);line-height:1.7;margin:8px 0 0}.media-tracks #media-track-selects{display:grid;grid-template-columns:1fr 1fr 1fr;gap:12px;margin-top:14px}.media-tracks #media-track-selects.hidden{display:none}.media-tracks label{font-size:10px;color:var(--secondary);min-width:0}.media-tracks select{display:block;width:100%;margin-top:6px;background:var(--field);border:1px solid var(--border);border-radius:6px;color:var(--ink);padding:8px;font-size:11px}.media-tracks .text-button{font-size:11px}.learning-sync{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:14px 0;margin-bottom:14px;border-bottom:1px solid var(--border);font-size:12px;color:var(--secondary)}
.avatar img,#side-avatar img{width:100%;height:100%;border-radius:inherit;object-fit:cover}.member-badge{display:inline-block;margin-left:12px;padding:4px 10px;border:1px solid var(--border);border-radius:16px;font-size:11px;font-weight:500;color:var(--accent)}
.balance-strip{display:grid;grid-template-columns:1.25fr 1fr 1fr;background:var(--surface);border:1px solid var(--border);border-radius:16px;margin:12px 0 42px;padding:28px}.balance-strip>div{padding:0 28px;border-left:1px solid var(--border)}.balance-strip>div:first-child{border:0;padding-left:0}.balance-strip span{color:var(--secondary);font-size:12px}.balance-strip strong{display:block;font-size:32px;font-weight:600;letter-spacing:-1px;margin-top:12px;color:var(--ink)}.balance-strip small{font-size:13px;color:var(--secondary);font-weight:400;letter-spacing:0}.balance-strip p{font-size:11px;color:var(--secondary);margin:10px 0 0}.balance-strip progress{height:4px;width:100%;max-width:240px;margin-top:17px;accent-color:var(--accent)}
.store-heading{display:flex;justify-content:space-between;align-items:center;gap:20px;margin:0 0 24px}.store-heading h2{font-size:25px;font-weight:500;letter-spacing:-.6px;margin:10px 0}.store-heading p{font-size:12px;color:var(--secondary);margin:0;line-height:1.8}.duration-tabs{display:flex;flex-wrap:wrap;gap:5px;padding:5px;background:var(--field);border:1px solid var(--border);border-radius:10px}.duration-tabs button{padding:9px 16px;font-size:12px;border-radius:6px;color:var(--secondary);white-space:nowrap}.duration-tabs button.active{background:var(--surface);color:var(--ink);box-shadow:0 1px 5px #0001}.membership-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.membership-card{border:1px solid var(--border);border-radius:15px;padding:25px;background:var(--surface);display:flex;flex-direction:column;min-width:0}.membership-card.featured{border-color:var(--accent);background:linear-gradient(160deg,color-mix(in srgb,var(--accent) 7%,var(--surface)),var(--surface) 65%)}.plan-top{display:flex;align-items:center;justify-content:space-between;gap:8px;min-height:30px}.plan-top span{font-size:10px;color:var(--secondary)}.plan-top b{font-size:9px;color:var(--accent);font-weight:500;white-space:nowrap}.membership-card h3{font-size:20px;font-weight:500;margin:18px 0 24px;color:var(--ink)}.plan-price{display:flex;align-items:baseline;gap:5px;min-height:54px;color:var(--ink)}.plan-price strong{font-size:37px;letter-spacing:-1px;font-weight:600}.plan-price>span{font-size:12px;color:var(--secondary)}.plan-price small{font-size:20px}.plan-allowance{font-size:12px;color:var(--secondary);padding-bottom:19px;border-bottom:1px solid var(--border)}.plan-allowance strong{color:var(--ink)}.membership-card ul{list-style:none;padding:0;margin:3px 0 25px;color:var(--secondary);font-size:12px;line-height:2.6}.membership-card li:before{content:'✓';margin-right:10px;color:var(--accent)}.membership-card .button{width:100%;margin-top:auto;font-size:12px}.store-note{font-size:11px;color:var(--secondary);line-height:1.8;margin:17px 0 46px}.credits-section{padding-top:30px;border-top:1px solid var(--border)}.credit-balance{color:var(--secondary);font-size:12px;white-space:nowrap}.credit-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;margin-bottom:35px}.credit-card{border:1px solid var(--border);border-radius:13px;background:var(--surface);padding:24px;position:relative}.credit-symbol{position:absolute;right:24px;top:26px;color:var(--accent);font-size:24px}.credit-card h3{font-size:25px;font-weight:600;margin:5px 0 12px;color:var(--ink)}.credit-card h3 small{font-size:11px;font-weight:400;color:var(--secondary)}.credit-card p{font-size:11px;color:var(--secondary)}.credit-card>div{display:flex;align-items:center;justify-content:space-between;border-top:1px solid var(--border);margin-top:22px;padding-top:20px;gap:12px}.credit-card>div>strong{font-size:23px;font-weight:500;color:var(--ink)}.credit-card .button{font-size:11px;min-height:34px;padding:8px 15px}.account-details{border-top:1px solid var(--border);padding-top:22px;color:var(--secondary);font-size:13px}.account-details summary{cursor:pointer}.account-details form{margin-top:18px}.account-hero{gap:16px}.account-hero>div{min-width:0}.account-hero p{overflow-wrap:anywhere}
@media(max-width:1050px){.membership-card{padding:20px 16px}.plan-top{align-items:flex-start;flex-direction:column}.balance-strip{padding:24px}.balance-strip>div{padding:0 18px}.balance-strip strong{font-size:27px}}
@media(max-width:700px){.membership-grid{grid-template-columns:1fr}.plan-top{flex-direction:row}.membership-card{padding:25px}.store-heading{align-items:flex-start;flex-direction:column}.balance-strip{grid-template-columns:1fr;padding:22px;margin-bottom:30px;gap:20px}.balance-strip>div{border-left:0;border-top:1px solid var(--border);padding:18px 0 0}.balance-strip>div:first-child{padding:0}.balance-strip strong{font-size:30px}.media-tracks #media-track-selects{grid-template-columns:1fr}.media-track-heading{align-items:flex-start;flex-direction:column;gap:10px}.learning-sync{align-items:flex-start;font-size:11px}.learning-sync .text-button{white-space:nowrap;font-size:11px}.reading-inline .dialog-content{padding:22px 16px}.member-badge{margin:8px 0 0;display:table}.account-hero{align-items:flex-start;flex-wrap:wrap}.account-hero .button{margin-left:auto}.store-heading h2{font-size:23px}}

.duration-tabs button{background:transparent}.duration-tabs button.active{background:var(--surface)}.sync-help{margin:-5px 0 20px;font-size:11px}

/* 字幕在视频下方，右侧跟读与AI共用工具栏。 */
.learning-grid{grid-template-columns:minmax(0,1fr) 380px;align-items:start}.study-panel{height:clamp(650px,calc(100vh - 170px),960px);max-height:none;min-height:0;position:sticky;top:20px;overflow:hidden;display:flex;flex-direction:column}.study-panel .panel-tabs{flex-shrink:0}.reading-sidebar{border:0;flex:1;min-height:0;overflow-y:auto;border-radius:0 0 12px 12px;scrollbar-gutter:stable}.reading-sidebar .dialog-content{padding:22px 18px}.reading-sidebar .eyebrow{font-size:8px;letter-spacing:1px;padding-right:20px}.reading-sidebar h2{font-size:19px}.reading-sidebar #reading-close{top:18px;right:12px}.reading-sidebar .reading-reference{padding:12px;margin:16px 0 0}.reading-sidebar .reading-reference textarea{font-size:15px;line-height:1.65;min-height:65px;max-height:130px}.reading-sidebar .reading-reference .button{font-size:10px;padding:6px 9px}.reading-sidebar .recording-zone{padding:19px 0 8px;gap:5px 12px;grid-template-columns:58px 1fr}.reading-sidebar .record-button{width:56px;height:56px}.reading-sidebar .record-button svg{width:24px;height:24px}.reading-sidebar .recording-zone strong{font-size:12px}.reading-sidebar .recording-zone .quiet{font-size:10px;text-align:left;line-height:1.7;margin-top:10px}.reading-sidebar .record-meter{height:4px}.reading-sidebar .reading-actions{gap:8px;margin-top:12px}.reading-sidebar .reading-actions .button{font-size:11px;min-height:34px;padding:7px 10px}.reading-sidebar audio{height:36px;width:100%}.reading-sidebar .reading-status{font-size:11px;line-height:1.7;text-align:left}.reading-sidebar .reading-privacy{font-size:10px;line-height:1.8}.reading-sidebar .assessment-summary{padding:17px 10px;gap:12px}.reading-sidebar .assessment-ring{height:88px;width:88px;flex-shrink:0}.reading-sidebar .assessment-ring strong{font-size:28px}.reading-sidebar .assessment-ring span{font-size:9px}.reading-sidebar .assessment-metrics{min-width:0;flex:1}.reading-sidebar .assessment-metrics>div{gap:6px}.reading-sidebar .assessment-metrics span{font-size:10px;min-width:50px}.reading-sidebar .assessment-metrics progress{min-width:20px}.reading-sidebar .assessment-metrics strong{font-size:10px}.reading-sidebar .assessed-sentence{font-size:16px;padding:15px;line-height:2}.reading-sidebar .score-legend{gap:8px;flex-wrap:wrap;font-size:9px}.reading-sidebar .assessment-details{font-size:11px}.subtitle-workspace{border-top:1px solid var(--border);background:var(--surface);border-radius:0 0 12px 12px;overflow:hidden}.subtitle-workspace-heading{padding:16px 22px;border-bottom:1px solid var(--border)}#tab-subtitles{display:flex;align-items:center;gap:9px;background:transparent;padding:0;color:var(--ink);font-size:13px;font-weight:500}#tab-subtitles svg{width:17px;height:17px;color:var(--accent)}#cue-count{font-size:10px;border:1px solid var(--border);border-radius:4px;padding:0 6px;color:var(--secondary)}.subtitle-workspace .panel-body{height:360px;display:flex;flex-direction:column}.subtitle-workspace .transcript{overflow-y:auto;flex:1;min-height:0}.subtitle-workspace .transcript-toolbar,.subtitle-workspace .panel-footer{flex-shrink:0}.subtitle-workspace .panel-empty{padding:35px 20px}.assessment-title{display:flex;align-items:center;justify-content:space-between;gap:10px;border-top:1px solid var(--border);margin-top:18px;padding-top:15px}.assessment-title h3{font-size:13px;font-weight:500;margin:0}.assessment-title>span{font-size:10px;color:var(--secondary)}.word-performance{display:flex;justify-content:space-between;gap:7px;border:1px solid var(--border);border-radius:8px;background:var(--field);padding:11px;font-size:10px;color:var(--secondary);margin:12px 0}.word-performance b{color:var(--ink);font-size:14px;font-weight:500}.word-breakdown{font-size:11px;margin:16px 0}.word-breakdown summary{cursor:pointer;color:var(--secondary);line-height:1.8}.word-table-scroll{overflow-x:auto;margin-top:10px;border:1px solid var(--border);border-radius:8px}.word-breakdown table{width:100%;border-collapse:collapse;font-size:11px}.word-breakdown th{text-align:left;font-size:10px;font-weight:400;color:var(--secondary);background:var(--field);padding:9px 7px}.word-breakdown td{padding:8px 7px;border-top:1px solid var(--border)}.word-breakdown td:first-child{color:var(--secondary);font-size:9px;width:20px}.word-breakdown td:nth-child(2){max-width:140px;overflow-wrap:anywhere}.word-breakdown td:nth-child(2) strong{font-weight:500}.word-breakdown .icon-button{display:inline-flex;vertical-align:middle;width:25px;height:25px;margin-left:3px}.word-breakdown .icon-button svg{width:14px;height:14px}.word-detail.good td:last-child{color:#55b99b}.word-detail.fair td:last-child{color:#d0aa54}.word-detail.poor td:last-child{color:#ec8889}.word-detail.missing td:last-child{color:var(--secondary)}.assessed-word.unknown{color:var(--secondary)}.practice-advice{background:var(--field);border:1px solid var(--border);border-radius:9px;padding:14px;margin-top:18px}.practice-advice h4{font-size:12px;font-weight:500;margin:0 0 10px}.practice-advice ol{margin:0 0 14px;padding-left:17px;color:var(--secondary);font-size:11px;line-height:1.9}.practice-advice li+li{margin-top:7px}.practice-advice .button{font-size:10px}
.streak-badge{display:flex;align-items:center;gap:5px;padding:7px 11px;border:1px solid var(--border);border-radius:18px;background:var(--surface);white-space:nowrap;font-size:11px;color:var(--secondary)}.streak-badge svg{height:20px;width:20px;stroke:#a18c7b;fill:#b29a7f22;stroke-width:1.5}.streak-badge strong{font-size:16px;font-weight:600;color:var(--ink)}.streak-badge small{font-size:9px;margin-left:5px;padding-left:8px;border-left:1px solid var(--border)}.streak-badge.completed svg{stroke:#f5a142;fill:#f5a14233}.streak-badge.completed small{color:#d99b50}.top-actions:has(.streak-badge:not(.hidden)) .local-badge{display:none}
@media(min-width:1600px){.learning-grid{grid-template-columns:minmax(0,1fr) 410px}.study-panel{height:clamp(720px,calc(100vh - 170px),1040px);max-height:none}.reading-sidebar .dialog-content{padding:24px}}
@media(max-width:1150px){.learning-grid{grid-template-columns:minmax(0,1fr) 340px}.transcript-toolbar{flex-wrap:wrap;gap:10px}.subtitle-workspace .search{flex:1;min-width:120px}.subtitle-workspace .offset-label{font-size:10px}}
@media(max-width:820px){.learning-grid{grid-template-columns:1fr}.study-panel{position:static;height:auto;max-height:none;min-height:360px}.reading-sidebar{max-height:none;overflow:visible}.reading-sidebar .dialog-content{padding:22px}.subtitle-workspace .panel-body{height:320px}.streak-badge small{display:none}.streak-badge{font-size:10px;padding:5px 9px}.streak-badge strong{font-size:14px}.streak-badge svg{width:18px;height:18px}}
@media(prefers-reduced-motion:reduce){.streak-badge *{animation:none}}

#online-local-login{display:flex;align-items:flex-start;gap:9px;font-size:11px;line-height:1.8;color:var(--secondary);margin:14px 0}#online-use-login{width:15px;min-width:15px;height:15px;padding:0;margin:3px 0 0;accent-color:var(--accent)}#online-status{font-size:12px;color:var(--accent);line-height:1.8;min-height:20px}
#online-browser-help{border:1px solid var(--border);border-radius:8px;padding:11px 13px;margin:14px 0;font-size:11px;color:var(--secondary)}#online-browser-help summary{cursor:pointer;color:var(--accent)}#online-browser-help p{font-size:11px;line-height:1.8;overflow-wrap:anywhere}#online-browser-help a{display:inline-block;font-size:11px;color:var(--accent)}

.subtitle-ai-tools{padding:17px 20px;border-top:1px solid var(--border);background:var(--surface)}.subtitle-ai-heading{display:flex;justify-content:space-between;gap:10px;font-size:12px}.subtitle-ai-heading span{font-size:10px;color:var(--secondary)}.subtitle-ai-tools .quiet{font-size:11px;line-height:1.8}.subtitle-ai-range{display:flex;align-items:center;gap:15px;flex-wrap:wrap;margin:14px 0}.subtitle-ai-range label{font-size:10px;color:var(--secondary)}.subtitle-ai-range input[type=number]{width:90px;margin-left:7px;padding:6px;border:1px solid var(--border);border-radius:5px;background:var(--field);color:var(--ink)}.subtitle-ai-check{display:flex;gap:6px;align-items:center}.subtitle-ai-check input{accent-color:var(--accent)}.subtitle-ai-actions{display:flex;gap:8px;flex-wrap:wrap}#subtitle-ai-status{font-size:11px;color:var(--secondary);line-height:1.8;margin:13px 0 0;overflow-wrap:anywhere}@media(max-width:540px){.subtitle-ai-tools{padding:14px}.subtitle-ai-heading{flex-direction:column;gap:3px}.subtitle-ai-range{gap:10px}.subtitle-ai-actions .button{font-size:10px}}