:root{--paper:#f7f6f2;--ink:#292e29;--muted:#646c60;--line:#dddfd6;--green:#365644;--soft:#e9eee4;--serif:Georgia,'Times New Roman','Songti SC',serif}*{box-sizing:border-box}[hidden]{display:none!important}body{margin:0;background:var(--paper);color:var(--ink);font-family:Inter,-apple-system,BlinkMacSystemFont,'PingFang SC','Microsoft Yahei',sans-serif;-webkit-font-smoothing:antialiased}button,a,input{ -webkit-tap-highlight-color:transparent}button{font:inherit;color:inherit;cursor:pointer}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible,summary:focus-visible{outline:2px solid var(--green);outline-offset:5px}button{border:0;background:none}header{max-width:1280px;margin:auto;display:flex;align-items:center;justify-content:space-between;padding:32px 56px}.brand{display:flex;align-items:center;gap:11px;font-size:15px;font-weight:600;letter-spacing:.1em}.quiet{font-size:13px;color:var(--muted);padding:10px 0}.quiet:hover{color:var(--green)}main{max-width:760px;margin:auto;padding:0 32px}.home{padding-top:clamp(60px,12vh,140px);padding-bottom:70px}.eyebrow{font-size:11px;letter-spacing:.14em;color:var(--muted);text-transform:uppercase}.home h1{font-family:var(--serif);font-weight:400;font-size:clamp(34px,5vw,52px);line-height:1.3;letter-spacing:-.025em;margin:23px 0 12px}.subtitle{color:var(--muted);font-size:14px;line-height:1.8}.feature{margin:54px 0 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:26px 0 28px}.feature-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.feature h2{font:400 26px/1.3 var(--serif);margin:0 0 12px}.preview{font:18px/1.85 var(--serif);color:#666e64;max-width:565px;margin:0 0 24px}.primary{border-radius:10px;background:var(--green);color:#fff;padding:13px 23px;font-size:13px;display:inline-flex;align-items:center;gap:34px}.primary:hover{background:#254432}.sub-actions{display:flex;gap:30px;align-items:center;margin-top:22px}.small{font-size:12px;color:var(--muted)}.home-foot{display:flex;justify-content:space-between;gap:16px;padding-top:42px;color:var(--muted);font-size:11px}.back{margin:30px 0 32px;font-size:13px;color:var(--muted);padding:8px 0}.reader{padding:0 0 100px}.reader h1{font:400 clamp(32px,5vw,45px)/1.25 var(--serif);letter-spacing:-.025em;margin:16px 0 10px}.byline{font-size:12px;color:var(--muted);margin-bottom:42px}.reading{font:21px/1.95 var(--serif);letter-spacing:.002em}.reading p{margin:0 0 26px}.word{font:inherit;padding:0;border-bottom:1px dotted #8b9d86;line-height:1.15;cursor:help;border-radius:2px}.word:hover{background:var(--soft);color:var(--green)}.reading-hint{font-size:11px;color:var(--muted);margin-bottom:27px}.tools{display:flex;gap:10px;flex-wrap:wrap;padding:26px 0;border-top:1px solid var(--line);margin-top:35px}.pill{border:1px solid var(--line);border-radius:8px;padding:10px 16px;font-size:12px}.pill:hover,.pill[aria-expanded=true]{background:var(--soft);border-color:#bac8b4}.panel{padding:24px 0;animation:appear .22s ease}.panel h3{font-size:17px;font-weight:500}.translation{font-size:15px;line-height:1.95;color:#596353}.sentence{font:22px/1.65 var(--serif)}.analysis{line-height:1.9;font-size:14px}.quiz{border-top:1px solid var(--line);padding:26px 0}.question{font-size:16px;line-height:1.7}.option{display:block;text-align:left;width:100%;margin:8px 0;border:1px solid var(--line);border-radius:8px;padding:14px 16px;font-size:14px;line-height:1.5}.option:hover{background:#eeeee7}.option.correct{border-color:#6c9072;background:#e9efe6}.option.incorrect{border-color:#bb8a76;background:#f4eae1}.explanation{font-size:13px;line-height:1.8;color:var(--green)}.source{font-size:11px;color:var(--muted);line-height:1.9;border-top:1px solid var(--line);padding:22px 0}.source a{text-decoration:underline;text-underline-offset:3px}.finish{margin-top:18px;display:flex;align-items:center;gap:24px}.library{padding-bottom:80px}.library h1{font:400 36px var(--serif);margin:0 0 12px}.book{display:flex;justify-content:space-between;width:100%;text-align:left;border-bottom:1px solid var(--line);padding:25px 0;gap:16px}.book:first-of-type{margin-top:35px;border-top:1px solid var(--line)}.book-title{font:24px/1.3 var(--serif)}.book-desc{font-size:12px;color:var(--muted);margin-top:8px}.book-arrow{align-self:center;color:var(--muted)}details{font-size:13px;margin:32px 0;color:var(--muted)}summary{cursor:pointer}details p{line-height:1.9}dialog{background:var(--paper);color:var(--ink);border:1px solid var(--line);border-radius:16px;padding:28px;width:min(480px,calc(100% - 32px));box-shadow:0 20px 90px #15201522}dialog::backdrop{background:#202b2440;backdrop-filter:blur(3px)}.note-top{display:flex;justify-content:space-between;align-items:center}.icon{font-size:26px;color:var(--muted);padding:0 4px}.vocab-word{font:36px var(--serif);margin:24px 0 10px}.vocab-meaning{font-size:16px;line-height:1.9}.vocab-context{font:16px/1.8 var(--serif);color:var(--muted);margin-top:20px}#toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%);font-size:12px;background:var(--ink);color:white;border-radius:30px;padding:12px 20px;opacity:0;pointer-events:none;transition:opacity .2s}.empty{padding:30px 0;color:var(--muted)}@keyframes appear{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}@media(min-width:1100px){main{max-width:760px}.home{position:relative}.home:before{content:'01 / ENGLISH';position:absolute;left:-155px;top:calc(12vh + 8px);font-size:10px;letter-spacing:.15em;color:#9ca395;writing-mode:vertical-rl}}@media(max-width:600px){header{padding:23px 25px}main{padding:0 27px}.home{padding-top:55px}.home h1{font-size:35px}.feature{margin-top:37px}.feature h2{font-size:25px}.preview{font-size:18px}.home-foot{padding-top:30px}.reader h1{font-size:34px}.reading{font-size:20px;line-height:1.95}.back{margin:22px 0 27px}.byline{margin-bottom:33px}.home-foot span:last-child{max-width:160px;text-align:right}}@media(prefers-reduced-motion:reduce){*{animation:none!important;scroll-behavior:auto!important}}
.opening{font:22px/1.9 var(--serif);color:#687062;margin:30px 0 35px;max-width:600px}.home h1[lang=en]{font-size:clamp(36px,5vw,54px);max-width:650px}.track-tabs{display:flex;gap:8px;flex-wrap:wrap;margin:30px 0}.track-tabs [aria-pressed=true]{color:var(--green);background:var(--soft);border-color:#a7b9a2}.search-label{display:block;color:var(--muted);font-size:12px;margin:24px 0 10px}.search{border:0;border-bottom:1px solid var(--line);background:transparent;width:100%;font:16px inherit;color:var(--ink);padding:12px 0;border-radius:0;outline-offset:5px}.shelf-count{display:flex;justify-content:space-between;align-items:center;margin:14px 0 0}.books .book:first-of-type{margin-top:5px}.pagination{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-top:28px}button:disabled{opacity:.35;cursor:default}@media(max-width:600px){.opening{font-size:20px}.home h1[lang=en]{font-size:38px}.home{padding-top:55px}.track-tabs{gap:6px}.track-tabs .pill{padding:9px 14px}}
.is-reading header{display:none}.reader-back{font-size:27px;padding:8px;width:44px;height:44px;margin-left:-8px;text-align:left}.reader{padding-top:15px}.is-onboarding #shelf{visibility:hidden}.goal-choices{margin:40px 0;max-width:420px}.goal{width:100%;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);font-size:22px;text-align:left;padding:22px 0}.goal span{font-size:19px;color:var(--muted)}.goal:hover{color:var(--green)}.recommend-actions{display:flex;gap:28px;margin-top:18px}.filter-row{display:flex;gap:18px;flex-wrap:wrap}.filter-row label{font-size:11px;color:var(--muted);display:flex;align-items:center;gap:8px}.filter-row select{font:13px inherit;color:var(--ink);border:0;background:transparent;max-width:170px;padding:8px}.test-page{padding:45px 0 80px}.test-page h1{font:36px/1.3 var(--serif);margin-top:30px}.test-page .primary{margin-top:20px}.test-page .option{max-width:520px}.test-page .sentence{margin-top:35px}.test-page .reader-back{display:block;margin-top:0;margin-bottom:30px}@media(max-width:600px){.onboarding h1{font-size:31px}.reader{padding-top:0}.test-page{padding-top:26px}}
.welcome{max-width:460px;margin:auto;text-align:center;padding:clamp(70px,15vh,160px) 0 60px}.welcome h1{font-size:32px;font-weight:500;letter-spacing:.12em;margin:25px 0 12px}.login-actions{margin-top:48px}.login-actions .primary{min-width:220px;justify-content:space-between}.login-actions .small{margin-top:18px}.login-note{margin:30px auto;max-width:320px;font-size:12px;line-height:1.8}.setup{max-width:550px;margin:auto;padding:60px 0}.setup>.eyebrow{display:block}.setup h1{font:400 36px/1.4 var(--serif);margin:22px 0 35px}.setup .reader-back{display:block;margin:0 0 24px}.subject-choices{margin:40px 0}.subject-choice{display:flex;gap:20px;align-items:center;padding:28px 0;width:100%;text-align:left;border-bottom:1px solid var(--line)}.subject-symbol{width:52px;height:52px;border-radius:15px;background:var(--soft);display:grid;place-items:center;color:var(--green);font:27px var(--serif)}.math-symbol{background:#eeeadf;color:#887852}.subject-choice strong{font-size:21px;font-weight:500;display:block}.subject-choice small{font-size:12px;color:var(--muted);display:block;margin-top:8px}.choice-arrow{margin-left:auto;color:var(--muted)}.level-choices{margin:30px 0}.level-choice{width:100%;text-align:left;position:relative;padding:24px 25px 24px 0;border-bottom:1px solid var(--line)}.level-choice strong{display:block;font-size:19px;font-weight:500}.level-choice small{display:block;color:var(--muted);margin-top:10px;font-size:13px}.level-choice>span{position:absolute;right:0;top:35px;color:var(--muted)}.dashboard{max-width:640px;margin:20px auto 60px}.dashboard-top{display:flex;justify-content:space-between}.dashboard-heading{display:flex;align-items:baseline;justify-content:space-between;margin:22px 0}.dashboard-heading h1{font:400 38px var(--serif);margin:0}.study-card{padding:30px;border:1px solid var(--line);border-radius:18px;background:#fbfaf6}.study-card .feature-top{margin-bottom:22px}.study-card .feature-top .quiet{padding:0}.study-card h2{font:400 32px/1.3 var(--serif);letter-spacing:-.025em;margin:0 0 10px}.study-zh{font-size:13px;color:var(--muted);margin:0}.study-preview{font:19px/1.8 var(--serif);color:#687062;margin:25px 0;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}.study-card-bottom{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:26px}.news-section{margin-top:36px}.news-heading{display:flex;justify-content:space-between;align-items:center}.news-heading h2{font-size:14px;font-weight:500}.news-item{display:block;position:relative;border-bottom:1px solid var(--line);padding:18px 28px 20px 0}.news-source{font-size:10px;color:var(--muted)}.news-item h3{font:400 20px/1.5 var(--serif);margin:8px 0}.news-cn{font-size:12px;line-height:1.7;color:var(--muted)}.news-arrow{position:absolute;right:0;top:50%}.news-note{font-size:10px;color:var(--muted);margin-top:12px}.bottom-nav{display:flex;justify-content:center;gap:55px;margin-top:36px;padding:22px 0;border-top:1px solid var(--line)}.bottom-nav button{font-size:13px;color:var(--muted)}.bottom-nav [aria-current=page]{color:var(--green);font-weight:600}.preference-list{margin:20px 0}.preference-list button{display:flex;justify-content:space-between;width:100%;padding:22px 0;border-bottom:1px solid var(--line);font-size:14px}.preference-list strong{font-weight:400;color:var(--muted)}@media(max-width:600px){.welcome{padding-top:85px}.setup{padding-top:32px}.setup h1{font-size:30px}.dashboard{margin-top:4px}.dashboard-heading{margin:22px 0}.dashboard-heading h1{font-size:32px}.study-card{padding:23px;border-radius:15px}.study-card h2{font-size:28px}.study-card-bottom{align-items:flex-start;flex-direction:column;gap:15px}.study-card-bottom .primary{width:100%;justify-content:space-between}.news-section{margin-top:28px}.dashboard-top .quiet{font-size:12px}.study-preview{font-size:18px}.news-item h3{font-size:19px}}
.is-onboarding header{display:none}.is-onboarding .setup{padding-top:70px}.is-onboarding .welcome{padding-top:clamp(100px,20vh,200px)}@media(max-width:600px){.is-onboarding .setup{padding-top:65px}.is-onboarding .welcome{padding-top:130px}}
.reading,.sentence,.book-title,.study-card h2,.reader h1{overflow-wrap:anywhere}.source{overflow-wrap:anywhere}.search{font-family:inherit;font-size:16px}.filter-row select{font-family:inherit;font-size:13px}

/* Consistent, quiet icon actions; important choices retain visible labels. */
button.ui-icon-button{display:inline-flex;align-items:center;justify-content:center;width:44px;min-width:44px;height:44px;min-height:44px;padding:10px;margin-left:0;border:0;border-radius:12px;background:transparent;color:var(--muted);vertical-align:middle;line-height:1;flex-shrink:0;touch-action:manipulation}
button.ui-icon-button:hover:not(:disabled){background:var(--soft);color:var(--green)}
button.ui-icon-button:focus-visible,button.ui-icon-label:focus-visible{outline:2px solid var(--green);outline-offset:3px}
.ui-glyph{width:22px;height:22px;display:block;flex:none;pointer-events:none}
button.ui-icon-label{display:inline-flex;align-items:center;justify-content:center;gap:7px;min-height:44px;padding:8px 10px;line-height:1.3}
button.ui-icon-label .ui-glyph{width:18px;height:18px}
button.ui-icon-label span{pointer-events:none}
button.ui-icon-button:disabled{opacity:.3}
.rt-actions{align-items:center}
.wl-note-word.ui-icon-button{align-self:center}
.ln-selection .ui-icon-button{color:inherit}
@media(prefers-reduced-motion:reduce){button.ui-icon-button{transition:none}}

/* Reading has a local bookshelf entry, not a mixed activity tab bar. */
.is-content-surface>header{display:none}
.dashboard .dashboard-heading{margin-top:16px}
.dashboard-heading .ui-icon-label{color:var(--muted)}
/* News cards stay inside the reader; attribution is a deliberate final action. */
button.news-card{width:100%;text-align:left;color:inherit;min-height:72px}
button.news-card:hover{background:transparent}
button.news-card:hover h3{color:var(--green)}
button.news-card:focus-visible{outline:2px solid var(--green);outline-offset:3px;border-radius:6px}
.news-filters{margin:24px 0}
.news-topic{display:flex;align-items:center;gap:16px;font-size:13px;color:var(--muted);margin-top:16px}
.news-topic select{font:inherit;background:transparent;color:var(--ink);border:1px solid var(--line);border-radius:6px;padding:9px}
.news-library .news-card{padding:22px 28px 22px 0}
#newsPagination button{min-height:44px}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;animation:none!important;transition:none!important}}

/* A single compact local header keeps the English entry focused. */
.is-onboarding .setup.english-hub{padding-top:24px}
.english-hub-header{display:grid;grid-template-columns:44px minmax(0,1fr) 44px;align-items:center;gap:12px;margin-bottom:26px}
.english-hub-header>.eyebrow{text-align:center;font-size:13px;letter-spacing:.12em}
.english-hub .english-hub-header .reader-back{display:inline-flex;margin:0}
.english-hub .english-hub-header .account-entry{position:static;margin:0}
.english-hub h1{margin-top:0}
#note textarea{font-family:inherit;font-size:15px;line-height:1.7}
#note .vocab-word,.rt-review h1{overflow-wrap:anywhere}
input[type=file]{max-width:100%}
.filter-row select,.news-topic select,#moreNews,#rt-skip{min-height:44px}
#app h1[tabindex="-1"]:focus{outline:none}
@media(max-width:600px){.is-onboarding .setup.english-hub{padding-top:18px}.english-hub-header{margin-bottom:24px}}
.login-note{max-width:360px;text-align:left}.login-note summary{text-align:center;cursor:pointer}.login-note form{margin-top:20px}.login-note label{display:block;margin:14px 0;font-size:12px;color:var(--muted)}.login-note input{display:block;box-sizing:border-box;width:100%;margin-top:6px;padding:12px;border:1px solid var(--line);border-radius:8px;background:var(--paper);color:var(--ink);font:inherit}.cloud-actions{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin:16px 0}.cloud-actions .primary{min-width:0}.cloud-account{border:1px solid var(--line);border-radius:12px;padding:18px;margin:18px 0}.cloud-account h2{font-size:17px;font-weight:500;margin:0 0 8px}.cloud-account .small{line-height:1.7}.cloud-account .cloud-signout{margin-top:8px}.cloud-account #cloudPreview{white-space:pre-line}.cloud-account #cloudPreview .primary{margin-right:12px}