:root{color-scheme:light;--bg:#edf2f3;--bg-deep:#dfe8e9;--panel:rgba(255,255,255,.88);--solid:#fff;--text:#182c32;--muted:#65787d;--faint:#8a9a9e;--line:rgba(32,70,76,.14);--primary:#1e8586;--primary-deep:#126a72;--primary-soft:rgba(30,133,134,.11);--accent:#e58b54;--success:#278b67;--danger:#c74b5d;--shadow:0 22px 65px rgba(31,63,72,.13);--soft:0 10px 28px rgba(31,63,72,.08);--radius:20px;--sans:Inter,"Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif}
:root[data-theme=dark]{color-scheme:dark;--bg:#0a171b;--bg-deep:#0e2328;--panel:rgba(17,37,43,.9);--solid:#142d34;--text:#f1f7f5;--muted:#a1b5b6;--faint:#728b8e;--line:rgba(182,217,214,.15);--primary:#5bc8bb;--primary-deep:#38a79f;--primary-soft:rgba(91,200,187,.14);--accent:#f0a36e;--success:#6dd5a3;--danger:#ff7d8c;--shadow:0 25px 75px rgba(0,0,0,.35);--soft:0 12px 32px rgba(0,0,0,.25)}
*{box-sizing:border-box}html{min-width:320px;scroll-behavior:smooth}body{margin:0;min-height:100vh;overflow-x:hidden;background:radial-gradient(circle at 10% 0%,color-mix(in srgb,var(--primary) 11%,transparent),transparent 30rem),linear-gradient(145deg,var(--bg),var(--bg-deep));color:var(--text);font:14px/1.55 var(--sans);-webkit-font-smoothing:antialiased}button,input,select,textarea{font:inherit;color:inherit}button,a{-webkit-tap-highlight-color:transparent}button{border:0;cursor:pointer}a{color:inherit;text-decoration:none}button:focus-visible,input:focus-visible,select:focus-visible,a:focus-visible{outline:3px solid color-mix(in srgb,var(--primary) 55%,transparent);outline-offset:3px}
.sync-header{position:sticky;top:0;z-index:20;min-height:68px;padding:8px max(18px,env(safe-area-inset-left)) 8px max(18px,env(safe-area-inset-right));display:flex;align-items:center;justify-content:space-between;gap:18px;border-bottom:1px solid var(--line);background:color-mix(in srgb,var(--bg) 82%,transparent);backdrop-filter:blur(20px)}.sync-brand{display:flex;align-items:center;gap:10px}.sync-brand>span:last-child{display:grid;line-height:1.08}.sync-brand b{font-size:16px}.sync-brand small{margin-top:4px;color:var(--faint);font-size:9px;letter-spacing:.12em}.brand-mark{width:39px;height:39px;display:grid;place-items:center;border-radius:12px;background:linear-gradient(145deg,var(--primary),var(--primary-deep));color:#fff;font-size:20px;font-weight:900;box-shadow:0 7px 18px color-mix(in srgb,var(--primary) 25%,transparent)}.header-actions{display:flex;align-items:center;gap:8px}.icon-btn,.home-link{min-height:38px;border:1px solid var(--line);border-radius:11px;background:var(--panel);font-weight:800}.icon-btn{width:38px;display:grid;place-items:center;font-size:16px}.home-link{padding:0 12px;display:inline-flex;align-items:center;color:var(--primary);font-size:11px}.icon-btn:hover,.home-link:hover{border-color:var(--primary);background:var(--primary-soft)}
.sync-shell{width:min(1180px,calc(100% - 32px));margin:28px auto 70px}.hero-strip{min-height:168px;padding:28px 34px;display:flex;align-items:center;justify-content:space-between;gap:28px;border:1px solid color-mix(in srgb,var(--primary) 24%,var(--line));border-radius:var(--radius);background:linear-gradient(115deg,color-mix(in srgb,var(--primary) 17%,var(--panel)),var(--panel));box-shadow:var(--soft)}.eyebrow{display:block;color:var(--primary);font-size:9px;font-weight:900;letter-spacing:.17em}.hero-strip h1{margin:9px 0 5px;font-size:clamp(30px,4vw,45px);line-height:1.05;letter-spacing:-.05em}.hero-strip p{margin:0;color:var(--muted);font-size:14px}.hero-mark{width:112px;height:112px;position:relative;display:grid;place-items:center;flex:0 0 auto;border:1px solid color-mix(in srgb,var(--primary) 35%,var(--line));border-radius:32px;background:var(--primary-soft);color:var(--primary);font-family:serif;font-size:55px;font-weight:900;transform:rotate(3deg)}.hero-mark:before{content:"";position:absolute;inset:10px;border:1px dashed color-mix(in srgb,var(--primary) 45%,transparent);border-radius:23px}.hero-mark i{position:absolute;width:7px;height:7px;border-radius:50%;background:var(--accent)}.hero-mark i:nth-of-type(1){top:18px;right:20px}.hero-mark i:nth-of-type(2){bottom:21px;left:19px;background:var(--primary)}.hero-mark i:nth-of-type(3){right:11px;bottom:37px;width:4px;height:4px}
.edition-bar{margin-top:14px;padding:12px 16px;display:flex;align-items:center;gap:12px;border:1px solid var(--line);border-radius:15px;background:var(--panel);box-shadow:var(--soft)}.edition-label{min-width:190px;display:grid;gap:2px}.edition-label small{color:var(--faint);font-size:9px}.edition-label b{font-size:14px}.edition-select{min-width:0;display:flex;align-items:center;gap:7px;color:var(--muted);font-size:11px;font-weight:800}.edition-select select{min-width:150px;height:38px;padding:0 28px 0 10px;border:1px solid var(--line);border-radius:10px;outline:0;background:var(--solid);font-size:12px}.edition-select select:focus{border-color:var(--primary)}
.sync-tabs{margin:18px 0 16px;padding:5px;display:flex;gap:4px;overflow-x:auto;border:1px solid var(--line);border-radius:15px;background:var(--panel);scrollbar-width:none}.sync-tabs::-webkit-scrollbar{display:none}.sync-tab{min-height:42px;padding:0 14px;display:inline-flex;align-items:center;justify-content:center;gap:7px;flex:0 0 auto;border-radius:10px;background:transparent;color:var(--muted);font-size:11px;font-weight:900;white-space:nowrap}.sync-tab span{color:var(--faint);font-size:15px}.sync-tab.active{background:var(--primary);color:#fff;box-shadow:0 5px 15px color-mix(in srgb,var(--primary) 22%,transparent)}.sync-tab.active span{color:#fff}
.sync-workspace{min-width:0}.page-heading{margin:0 0 14px;display:flex;align-items:end;justify-content:space-between;gap:16px}.page-heading h2{margin:3px 0 0;font-size:25px;letter-spacing:-.035em}.page-heading p{margin:0;color:var(--muted);font-size:12px}.paper{border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);box-shadow:var(--soft)}.today-grid{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(250px,.8fr);gap:14px}.today-main{padding:22px}.today-main h3{margin:4px 0;font-size:23px}.today-main>p{margin:0;color:var(--muted);line-height:1.75}.today-progress{height:9px;margin:20px 0 12px;overflow:hidden;border-radius:10px;background:var(--bg-deep)}.today-progress i{display:block;height:100%;width:34%;border-radius:inherit;background:linear-gradient(90deg,var(--primary),#74d7a9)}.today-progress-row{display:flex;justify-content:space-between;color:var(--muted);font-size:11px}.quick-actions{margin-top:20px;display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.quick-action{min-height:76px;padding:12px;display:grid;align-content:center;gap:5px;border:1px solid var(--line);border-radius:13px;background:var(--solid);text-align:left}.quick-action:hover{border-color:var(--primary);background:var(--primary-soft)}.quick-action b{font-size:12px}.quick-action span{color:var(--muted);font-size:10px}.today-side{padding:18px;display:grid;gap:10px;align-content:start}.today-side h3{margin:0;font-size:15px}.stat-row{padding:11px 0;display:flex;justify-content:space-between;border-bottom:1px solid var(--line);font-size:11px}.stat-row:last-child{border-bottom:0}.stat-row span{color:var(--muted)}.stat-row b{color:var(--primary);font-size:16px}.notice-line{margin-top:13px;padding:10px 12px;border-radius:11px;background:var(--primary-soft);color:var(--muted);font-size:10px}
.lesson-list{display:grid;gap:9px}.lesson-row{padding:15px;display:grid;grid-template-columns:42px minmax(0,1fr) auto;align-items:center;gap:12px}.lesson-number{width:35px;height:35px;display:grid;place-items:center;border-radius:11px;background:var(--primary-soft);color:var(--primary);font-weight:900}.lesson-row h3{margin:0;font-size:14px}.lesson-row p{margin:4px 0 0;color:var(--muted);font-size:11px}.lesson-row .row-actions{display:flex;gap:7px}.lesson-row.is-active{border-color:color-mix(in srgb,var(--primary) 48%,var(--line));box-shadow:inset 3px 0 var(--primary)}
.word-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}.word-card{min-width:0;padding:16px}.word-card h3{margin:0;font-size:20px}.word-card .pinyin{margin-top:3px;color:var(--primary);font-size:11px}.word-card p{margin:10px 0 0;color:var(--muted);font-size:11px;line-height:1.65}.word-card footer{margin-top:12px;padding-top:9px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:8px}.word-card footer button{color:var(--primary);background:none;font-size:11px;font-weight:900}
.dictation-panel{padding:24px;display:grid;grid-template-columns:minmax(0,1fr) 250px;gap:20px}.dictation-copy h3{margin:5px 0 5px;font-size:24px}.dictation-copy p{margin:0;color:var(--muted)}.dictation-card{padding:18px;display:grid;gap:11px;border:1px solid var(--line);border-radius:16px;background:var(--solid)}.dictation-card label{display:grid;gap:6px;color:var(--muted);font-size:11px;font-weight:800}.dictation-card input{height:45px;padding:0 12px;border:1px solid var(--line);border-radius:10px;outline:0;background:var(--panel);font-size:18px}.dictation-card input:focus{border-color:var(--primary)}.dictation-prompt{color:var(--primary);font-size:13px;font-weight:900}.result{min-height:22px;font-size:11px;font-weight:800}.result.ok{color:var(--success)}.result.bad{color:var(--danger)}
.classic-grid,.writing-grid,.progress-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.classic-card,.writing-card,.progress-card{padding:20px}.classic-card h3,.writing-card h3,.progress-card h3{margin:0 0 6px;font-size:18px}.classic-card .source{color:var(--primary);font-size:11px;font-weight:800}.classic-card p,.writing-card p,.progress-card p{margin:10px 0 0;color:var(--muted);font-size:12px;line-height:1.8}.writing-card ul{margin:10px 0 0;padding-left:18px;color:var(--muted);font-size:12px;line-height:1.9}.progress-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.progress-card strong{display:block;color:var(--primary);font-size:32px;line-height:1}.progress-card small{color:var(--faint);font-size:10px}.primary-btn,.quiet-btn{min-height:40px;padding:0 14px;border-radius:10px;font-size:11px;font-weight:900}.primary-btn{background:linear-gradient(135deg,var(--primary),var(--primary-deep));color:#fff;box-shadow:0 7px 18px color-mix(in srgb,var(--primary) 20%,transparent)}.quiet-btn{border:1px solid var(--line);background:var(--solid);color:var(--text)}.primary-btn:hover,.quiet-btn:hover{transform:translateY(-1px)}
.sync-dialog{width:min(470px,calc(100% - 24px));padding:0;border:1px solid var(--line);border-radius:20px;background:var(--solid);color:var(--text);box-shadow:var(--shadow)}.sync-dialog::backdrop{background:rgba(3,12,16,.58);backdrop-filter:blur(6px)}.dialog-card{padding:22px}.dialog-card header{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}.dialog-card h2{margin:4px 0 22px}.setting-row{margin:16px 0;display:grid;grid-template-columns:1fr auto;gap:9px;align-items:center;color:var(--muted);font-size:12px}.setting-row b{color:var(--primary)}.setting-row input[type=range]{grid-column:1/-1;width:100%;accent-color:var(--primary)}.setting-row input[type=checkbox]{width:20px;height:20px;accent-color:var(--primary)}.dialog-actions{margin-top:24px;display:flex;justify-content:flex-end;gap:8px}.toast{position:fixed;right:18px;bottom:18px;z-index:40;max-width:350px;padding:11px 15px;border:1px solid var(--line);border-radius:12px;background:var(--solid);box-shadow:var(--shadow);font-size:12px;font-weight:800;opacity:0;transform:translateY(9px);pointer-events:none;transition:.2s}.toast.show{opacity:1;transform:none}
@media(max-width:850px){.sync-shell{width:min(100% - 24px,680px);margin-top:16px}.hero-strip{padding:22px;min-height:145px}.edition-bar{flex-wrap:wrap}.edition-label{flex:1 1 100%}.edition-select{flex:1}.edition-select select{width:100%;min-width:0}.today-grid,.dictation-panel{grid-template-columns:1fr}.word-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.progress-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(max-width:560px){.sync-header{min-height:58px;padding:7px 10px}.sync-brand b{font-size:13px}.sync-brand small{display:none}.brand-mark{width:34px;height:34px;border-radius:10px;font-size:17px}.home-link{font-size:0;width:38px;padding:0;justify-content:center}.home-link:before{content:'⌂';font-size:17px}.header-actions{gap:5px}.icon-btn{width:35px;min-height:35px}.hero-strip{min-height:132px;padding:18px;border-radius:16px}.hero-strip h1{font-size:29px}.hero-strip p{font-size:12px}.hero-mark{width:76px;height:76px;border-radius:22px;font-size:38px}.hero-mark:before{inset:7px;border-radius:16px}.edition-bar{padding:10px;border-radius:13px}.edition-select{display:grid;gap:4px}.edition-select select{height:36px;font-size:11px}.sync-tabs{margin:12px 0;padding:4px;border-radius:13px}.sync-tab{min-height:38px;padding:0 11px;font-size:10px}.sync-tab span{font-size:13px}.page-heading{display:block}.page-heading p{margin-top:5px}.today-main,.today-side,.dictation-panel,.classic-card,.writing-card,.progress-card{padding:16px}.today-main h3{font-size:20px}.quick-actions{grid-template-columns:1fr;gap:7px}.quick-action{min-height:58px;grid-template-columns:28px 1fr;align-items:center}.quick-action:before{content:'•';color:var(--primary);font-size:24px;grid-row:span 2}.word-grid,.classic-grid,.writing-grid{grid-template-columns:1fr}.word-card{padding:14px}.lesson-row{grid-template-columns:35px minmax(0,1fr)}.lesson-row .row-actions{grid-column:2}.lesson-row .row-actions button{flex:1}.progress-grid{grid-template-columns:1fr}.progress-card{min-height:90px;display:flex;align-items:center;justify-content:space-between}.dictation-copy h3{font-size:21px}}
 .tool-line{margin:0 0 12px;display:flex;align-items:center;justify-content:space-between;color:var(--muted);font-size:11px}.tool-line .quiet-btn{min-height:34px;padding:0 11px}.reading-panel,.exercise-panel{padding:22px}.reading-head{display:flex;align-items:center;justify-content:space-between;gap:14px;border-bottom:1px solid var(--line);padding-bottom:15px}.reading-head h3{margin:5px 0 0;font-size:23px}.reading-paragraphs{display:grid;gap:9px;margin-top:16px}.reading-paragraph{padding:14px;display:grid;grid-template-columns:27px minmax(0,1fr) auto;align-items:start;gap:10px;border:1px solid var(--line);border-radius:13px;background:var(--solid)}.reading-paragraph>span{width:25px;height:25px;display:grid;place-items:center;border-radius:8px;background:var(--primary-soft);color:var(--primary);font-weight:900;font-size:11px}.reading-paragraph p{margin:0;color:var(--text);font-size:13px;line-height:1.8}.reading-paragraph .quiet-btn{min-height:30px;padding:0 9px;font-size:10px}.reading-tools{margin-top:14px;display:grid;grid-template-columns:1fr 1fr;gap:10px}.reading-tools>div{padding:13px;border-radius:12px;background:var(--primary-soft)}.reading-tools b{font-size:12px}.reading-tools p{margin:5px 0 0;color:var(--muted);font-size:11px;line-height:1.65}.exercise-panel{max-width:760px}.exercise-kicker{display:flex;justify-content:space-between;align-items:center;gap:10px;color:var(--primary);font-size:13px}.exercise-panel h3{margin:20px 0 16px;font-size:21px;line-height:1.55}.exercise-answer{display:grid;gap:7px;color:var(--muted);font-size:11px;font-weight:800}.exercise-answer input,.sentence-card textarea{width:100%;padding:11px 12px;border:1px solid var(--line);border-radius:10px;outline:0;background:var(--solid);color:var(--text)}.exercise-answer input{height:43px}.exercise-answer input:focus,.sentence-card textarea:focus{border-color:var(--primary)}.exercise-panel .notice-line{margin-top:18px}.exercise-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.sentence-card{padding:18px}.sentence-card h3{margin:7px 0 5px;font-size:16px;line-height:1.5}.sentence-card>p{margin:0 0 11px;color:var(--muted);font-size:11px}.sentence-card textarea{resize:vertical;min-height:78px;font-size:12px}.sentence-card .dialog-actions{margin-top:10px}.review-list{display:grid;gap:9px}.review-row{padding:15px;display:flex;align-items:center;justify-content:space-between;gap:14px}.review-row>div:first-child{display:grid;gap:3px;min-width:0}.review-row b{font-size:18px}.review-row span,.review-row small{color:var(--muted);font-size:11px}.review-row .row-actions{display:flex;gap:7px;flex:0 0 auto}.empty-state{padding:30px;text-align:center}.empty-state b{font-size:16px}.empty-state p{margin:6px 0 0;color:var(--muted);font-size:12px}.progress-advice{margin-top:12px;padding:20px}.progress-advice h3{margin:0 0 6px;font-size:16px}.progress-advice p{margin:0;color:var(--muted);font-size:12px;line-height:1.8}.pinyin.is-hidden{visibility:hidden;user-select:none}.edition-label b{white-space:normal}
@media(max-width:850px){.edition-label{flex-basis:100%}.reading-tools,.exercise-grid{grid-template-columns:1fr}}
@media(max-width:560px){.reading-panel,.exercise-panel{padding:16px}.reading-head{align-items:flex-start;flex-direction:column}.reading-head .primary-btn{width:100%}.reading-paragraph{grid-template-columns:27px minmax(0,1fr)}.reading-paragraph .quiet-btn{grid-column:2;justify-self:start}.review-row{align-items:flex-start;flex-direction:column}.review-row .row-actions{width:100%}.review-row .row-actions button{flex:1}.tool-line{align-items:flex-start;gap:8px;flex-direction:column}}
.catalog-status{color:var(--faint);font-size:10px;line-height:1.3}.sync-catalog-btn{min-height:38px;padding:0 12px;border:1px solid var(--line);border-radius:10px;background:var(--primary-soft);color:var(--primary);font-size:11px;font-weight:900;white-space:nowrap}.sync-catalog-btn:hover:not(:disabled){border-color:var(--primary)}.sync-catalog-btn:disabled{cursor:wait;opacity:.65}.classic-lines{display:grid;gap:6px;margin:12px 0}.classic-line{padding:8px 9px;display:grid;grid-template-columns:20px minmax(0,1fr) auto;align-items:center;gap:8px;border-radius:9px;background:var(--primary-soft)}.classic-line>span{color:var(--primary);font-size:10px;font-weight:900}.classic-line p{margin:0!important;color:var(--text)!important;font-size:13px!important;line-height:1.6!important}.classic-line .quiet-btn{min-height:28px;padding:0 8px;font-size:10px}.classic-card .primary-btn{min-height:36px}.classic-card .dialog-actions{flex-wrap:wrap}
 .warning-line{background:color-mix(in srgb,var(--accent) 16%,var(--panel));color:var(--text)}.saved-section{margin-top:18px}.saved-section>h3{margin:0 0 10px;display:flex;align-items:center;gap:8px;font-size:16px}.saved-section>h3 span{min-width:22px;height:22px;padding:0 6px;display:inline-grid;place-items:center;border-radius:20px;background:var(--primary-soft);color:var(--primary);font-size:10px}.reading-notes{width:100%;margin-top:8px;padding:10px;border:1px solid var(--line);border-radius:9px;background:var(--solid);color:var(--text);font:inherit;font-size:12px;resize:vertical}.reading-tools .quiet-btn{margin-top:8px}
@media(min-width:1101px){.edition-bar{display:grid;grid-template-columns:minmax(180px,1.25fr) repeat(6,minmax(84px,1fr)) auto}.edition-label{min-width:0}.edition-select{display:grid;gap:4px}.edition-select select{width:100%;min-width:0}}
@media(max-width:850px){.edition-bar{align-items:stretch}.edition-label{width:100%}.edition-select{flex:1 1 calc(33.33% - 12px)}.sync-catalog-btn{align-self:center}}
@media(max-width:560px){.edition-select{flex-basis:calc(50% - 8px)}.sync-catalog-btn{width:100%}.classic-line{grid-template-columns:20px minmax(0,1fr)}.classic-line .quiet-btn{grid-column:2;justify-self:start}}