:root{--bg:#f6f8f7;--paper:#fff;--ink:#263d3a;--muted:#73837f;--green:#267467;--green-dark:#1d5c52;--green-pale:#e8f1ec;--line:#e6ece8;--peach:#f8e1d6;--yellow:#f6dfa0;--purple:#eceafa;--blue:#e6f0f7;--radius:20px;font-family:"PingFang SC","Hiragino Sans GB","Microsoft Yahei",sans-serif;color:var(--ink);font-size:15px;font-synthesis:none}*{box-sizing:border-box}body{margin:0;background:var(--bg)}button,input,select{font:inherit}button,a,input,select,summary{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button{color:inherit}button:disabled{cursor:default;opacity:.55}button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid #e2ae37;outline-offset:4px}input:focus,select:focus{outline:2px solid 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p{font-size:12px;color:#987e6c;margin:11px 0 21px;line-height:1.9}.primary-button,.secondary-button,.text-button{display:inline-flex;align-items:center;justify-content:center;gap:9px;border:0;font-weight:500;border-radius:10px;min-height:44px;padding:11px 19px;font-size:13px;text-decoration:none;line-height:1.4}.primary-button{background:var(--green);color:white}.primary-button:hover{background:var(--green-dark)}.primary-button .icon{width:17px;height:17px}.secondary-button{background:white;border:1px solid var(--line)}.secondary-button:hover{background:var(--green-pale)}.text-button{background:transparent;color:var(--green);padding:6px 0;min-height:32px;font-size:12px}.hero-art{position:absolute;width:48%;max-width:365px;right:-5px;bottom:-8px;height:260px}.section-title{display:flex;align-items:center;justify-content:space-between;margin:29px 0 16px;gap:14px}.section-title h2{font-size:18px}.section-title 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h2{font-size:25px;line-height:1.8;font-weight:500;white-space:pre-line;margin:20px 0 28px}.answer-list{display:grid;gap:12px}.answer-option{width:100%;text-align:left;border:1.5px solid #e3e9e5;background:white;display:flex;align-items:center;gap:16px;padding:16px;border-radius:12px;line-height:1.6;font-size:17px;min-height:61px}.answer-option .letter{display:grid;place-items:center;border-radius:7px;background:#f1f4f1;width:30px;height:30px;font-size:13px;flex-shrink:0}.answer-option.selected{border-color:var(--green);background:#f1f7f3}.answer-option.correct{border-color:#6da787;background:#edf7ef;opacity:1}.answer-option.wrong{border-color:#d8a378;background:#fff4eb;opacity:1}.answer-option:disabled{opacity:.7;color:var(--ink)}.quiz-actions{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-top:27px;flex-wrap:wrap}.hint-box{margin-top:18px;padding:16px 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p{font-size:11px;color:var(--muted)}.history-row .badge{margin-left:auto}.history-date{font-size:11px;min-width:43px;color:var(--muted)}.parent-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}.parent-grid .wide{grid-column:1/-1}.field{display:grid;gap:8px;font-size:12px;margin:17px 0}.field input,.field select{width:100%;min-height:42px;padding:10px;border:1px solid #dce5de;background:white;border-radius:9px}.field-row{display:flex;gap:12px}.field-row .field{flex:1}.parent-grid p{font-size:13px;color:var(--muted);margin-top:12px}.parent-grid h3{margin-bottom:12px}.source-list{font-size:12px;line-height:2;margin:12px 0;padding-left:20px}.source-list li{margin:7px 0}.notice{background:#f9f3e1;color:#8f7c42;padding:13px 18px;border-radius:12px;font-size:12px;line-height:1.9;margin-bottom:20px}.search-input{min-height:40px;border:1px solid var(--line);background:white;border-radius:10px;padding:10px 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.answer-option{font-size:21px}.subtle-divider{height:1px;background:var(--line);margin:22px 0}.family-report{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:20px}.family-report>div{padding:17px;border-radius:12px;background:var(--bg)}.family-report strong{font-size:14px}.family-report p{font-size:11px}.lesson-collection-note{font-size:12px;line-height:1.8;color:var(--muted);margin:24px 0}.tiny-link{font-size:11px;color:#7e9488;text-decoration:none}.import-file{display:none}
@media(min-width:1500px){.hero{min-height:290px}.hero h2{font-size:36px}.hero-art{max-width:420px;height:290px}.subject-card{min-height:220px}.home-grid{grid-template-columns:minmax(0,1fr) 285px}.topbar{padding:0 50px}.content{padding:38px 50px}}
@media(max-width:1180px){.sidebar{width:190px;padding:28px 16px}.main-shell{margin-left:190px}.content{padding:28px 25px}.topbar{padding:0 25px}.home-grid{grid-template-columns:minmax(0,1fr) 224px;gap:18px}.hero{padding:25px;min-height:250px}.hero h2{font-size:27px}.hero-copy{width:62%}.hero-art{right:-20px;width:46%}.subject-grid{gap:10px}.subject-card{padding:16px 13px}.aside-card{padding:20px 16px}.lesson-grid{gap:14px}.lesson-card{padding:20px}}
@media(max-width:1000px){.home-grid{grid-template-columns:1fr}.home-aside{display:grid;grid-template-columns:1.3fr 1fr;gap:20px}.focus-card{margin-top:0}.aside-quote{display:none}.hero-art{width:42%;right:15px}.hero h2{font-size:31px}.lesson-grid{grid-template-columns:repeat(2,1fr)}.lesson-layout{grid-template-columns:1fr}.lesson-layout aside{display:none}.parent-grid{grid-template-columns:1fr}.parent-grid .wide{grid-column:auto}}
@media(max-width:760px){.sidebar{position:static;width:100%;padding:15px 18px;border-right:0;border-bottom:1px solid var(--line);display:block}.brand{margin:0 0 15px;gap:8px}.brand-mark{width:29px;height:33px}.brand strong{font-size:20px}.brand small{font-size:9px}.nav-group{display:flex;gap:5px;overflow-x:auto;padding:4px 0}.nav-button{padding:10px 12px;gap:7px;min-height:39px;white-space:nowrap;font-size:12px;border-radius:10px}.nav-button .icon{width:17px;height:17px}.side-bottom{display:none}.app-shell{display:block}.main-shell{margin-left:0}.topbar{height:76px;padding:12px 18px;gap:12px}.breadcrumb{font-size:11px}.breadcrumb .icon{display:none}.profile-button{min-width:0;padding-right:10px;font-size:11px;gap:6px}.avatar{height:27px;width:27px;font-size:13px}.profile-switch{gap:2px;padding:4px}.content{padding:23px 18px 30px}.page-heading{margin-bottom:19px;align-items:flex-start;flex-direction:column;gap:13px}.page-heading h1{font-size:25px}.page-heading p{font-size:12px}.hero{min-height:252px;padding:24px}.hero h2{font-size:29px}.hero-art{right:-25px;width:45%;bottom:-15px;height:233px;opacity:.9}.hero-copy{width:70%}.hero p{max-width:80%;font-size:11px}.subject-grid{gap:9px}.subject-card{padding:15px 12px;min-height:216px}.subject-card .subject-version{font-size:9px;min-height:25px;line-height:1.7}.subject-card h3{font-size:16px}.subject-card .topic{font-size:11px}.subject-card .card-footer{padding-top:12px}.card-footer small{font-size:9px}.subject-symbol{height:36px;width:36px;font-size:21px;border-radius:11px}.section-title{margin-top:24px}.section-title h2{font-size:17px}.section-title .muted{display:none}.quick-row{gap:12px}.quick-card{padding:16px 12px;gap:11px;min-height:108px}.quick-card>.icon{width:23px;height:23px}.quick-card h3{font-size:13px}.quick-card .arrow{display:none}.home-aside{gap:12px;grid-template-columns:1.2fr 1fr}.aside-card{padding:20px 14px}.focus-card{padding:22px 12px}.focus-card .timer{font-size:32px}.timer-actions{gap:5px}.timer-actions button{padding:7px 10px}.today-date{font-size:9px}.aside-card h3{font-size:14px}.plan-item{gap:9px;margin:16px 0}.plan-item strong{font-size:11px}.plan-item p{font-size:9px}.lesson-grid{grid-template-columns:1fr}.paper{padding:24px 20px}.quiz-paper h2{font-size:22px}.answer-option{font-size:16px;padding:14px}.quiz-actions .primary-button{min-width:120px}.stats-grid{gap:10px}.stat-card{padding:19px 14px}.stat-card strong{font-size:26px}.stat-card h3{font-size:12px}.stat-card span{font-size:10px}.parent-grid{gap:15px}.lesson-cta{align-items:flex-start;flex-direction:column}.search-input{width:100%;min-width:0}.search-row{gap:0}.filter-bar{gap:6px}.filter-chip{font-size:11px;padding:8px 13px}.history-row{gap:11px}.family-report{grid-template-columns:1fr}.breadcrumb span:first-of-type{display:none}.footnote{font-size:9px}.score-row{gap:32px}}
@media(max-width:390px){.content{padding-left:13px;padding-right:13px}.topbar{padding-left:13px;padding-right:13px}.hero{padding:22px 19px}.hero h2{font-size:26px}.hero-art{opacity:.65;right:-38px}.hero-copy{width:78%}.home-aside{grid-template-columns:1fr}.focus-card{display:flex;align-items:center;gap:10px;flex-wrap:wrap;justify-content:center}.focus-card .timer{margin:6px}.focus-card>p{width:100%}.subject-card{padding:14px 10px}.quick-card>.icon{display:none}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
@media print{.sidebar,.topbar,.toolbar,.primary-button,.secondary-button,.text-button,.footnote{display:none!important}.main-shell{margin:0}.content{padding:0}.paper,.mistake-card{break-inside:avoid;border:1px solid #ccc}.lesson-layout{display:block}.home-grid{display:block}.hero-art{display:none}}
/* 首次见面与 iPad 互动课堂 */
.sidebar{overflow-y:auto}.nav-group{gap:5px}.side-note{padding:16px;margin-top:10px}.nav-button{min-height:44px}.primary-button,.secondary-button,.filter-chip,.text-button{min-height:44px}.diagnostic-welcome{display:grid;grid-template-columns:1.5fr 1fr;align-items:center;background:#f7e7da;border-radius:26px;min-height:305px;padding:36px 42px;overflow:hidden}.welcome-copy h1{font-size:36px;line-height:1.5;margin:15px 0;font-weight:600;letter-spacing:-1px}.welcome-copy p{font-size:15px;line-height:1.9;color:#7c6e5c}.welcome-art svg{width:100%;max-height:290px}.welcome-chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}.welcome-chips span{padding:6px 10px;background:#ffffff88;border-radius:20px;font-size:11px;color:#8a725c}.diagnostic-profiles{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin:25px 0}.diagnostic-profile{position:relative;padding:28px 32px}.diagnostic-profile>.avatar{width:52px;height:52px;font-size:24px;position:absolute;right:28px;top:28px}.diagnostic-profile h2{margin-bottom:12px;font-size:24px}.diagnostic-profile p{line-height:1.9;margin:12px 0 20px}.diagnostic-profile .primary-button{width:100%;justify-content:space-between}.diagnostic-parent-note p{line-height:1.9;color:var(--muted);font-size:14px;margin:12px 0}.diagnostic-input{font-size:23px!important;min-height:56px!important}.confidence{margin-top:25px;border-top:1px solid var(--line);padding-top:20px}.confidence p{font-size:14px;margin-bottom:12px}.reading-passage{background:#f6f7f0;padding:24px;border-radius:12px;font-size:20px;line-height:2;white-space:pre-line;margin-top:18px}.diagnostic-subjects{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.diagnostic-subjects .paper{padding:24px}.skill-result{border-top:1px solid var(--line);padding:20px 0}.skill-result h3{font-size:16px;margin-bottom:10px}.skill-result p{font-size:13px;line-height:1.9;margin-top:10px;white-space:pre-line}.next-step{color:var(--green)}.field textarea{width:100%;resize:vertical;min-height:85px;border:1px solid #dce5de;border-radius:12px;padding:13px;line-height:1.8;background:#fff;font:inherit;font-size:16px;color:var(--ink)}.lesson-steps{margin:30px 0}.lesson-steps>div{display:flex;gap:14px;align-items:flex-start;margin:18px 0}.lesson-steps>div>span{flex-shrink:0;display:grid;place-items:center;width:30px;height:30px;border-radius:50%;background:var(--green-pale);color:var(--green)}.lesson-steps p{font-size:17px;line-height:1.9}.read-along,.lesson-teacher{margin-top:30px;padding-top:24px;border-top:1px solid var(--line)}.lesson-teacher p{margin:18px 0 10px}.speech-row{padding:18px 0;border-bottom:1px solid var(--line);display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center}.speech-row strong{display:block;font-size:22px;font-weight:600}.speech-row span{font-size:13px;color:var(--muted);display:block;margin-top:5px}.speech-row .secondary-button{padding:8px 13px}.teacher-layout{display:grid;grid-template-columns:minmax(0,1fr) 250px;gap:24px;align-items:start}.teacher-identity{display:flex;align-items:center;gap:13px;padding-bottom:22px;border-bottom:1px solid var(--line)}.teacher-avatar{width:52px;height:52px;border-radius:16px;background:#3a625c;color:#fff;display:grid;place-items:center;font-family:serif;font-size:27px}.teacher-identity p{font-size:11px;color:var(--muted);margin-top:4px}.teacher-identity>.badge{margin-left:auto}.chat-messages{display:flex;flex-direction:column;gap:20px;max-height:580px;overflow-y:auto;padding:25px 0;overscroll-behavior:contain}.chat-message{max-width:92%;padding:20px 22px;border-radius:0 18px 18px;background:#f1f6f2;align-self:flex-start}.chat-message.user{background:#f9eddf;border-radius:18px 0 18px 18px;align-self:flex-end}.chat-message p{white-space:pre-line;line-height:1.9;font-size:17px;overflow-wrap:anywhere}.message-label{font-size:11px;color:var(--muted);margin-bottom:8px}.chat-message .text-button{font-size:12px}.chat-actions{display:flex;justify-content:space-between;gap:12px}.chat-wait{font-size:14px;color:var(--green)}.teacher-aside p{margin-top:14px;line-height:1.9;font-size:14px}.suggested-prompts{display:grid;gap:10px;margin:18px 0}.suggested-prompts .secondary-button{text-align:left;justify-content:flex-start;font-size:12px}.context-strip{padding:12px;background:#f8f4e8;border-radius:10px;font-size:13px;margin-top:18px}.word-chip{display:inline-flex;margin:5px 8px 0 0;border:1px solid #d7e2d8;background:white;border-radius:20px;padding:8px 12px;min-height:44px;font-size:12px}.word-form{display:flex;align-items:end;gap:14px}.word-form .field{flex:1;margin-bottom:0}.word-form .primary-button{margin-bottom:0;white-space:nowrap}.word-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin-top:24px}.word-card h2{font-size:29px;margin:15px 0;overflow-wrap:anywhere}.word-card details{margin:15px 0 20px;min-height:44px}.word-card summary{font-size:13px;cursor:pointer;color:var(--green)}.word-card details p{margin-top:10px}.word-card .toolbar{gap:8px}.word-review{display:flex;justify-content:space-between;margin-top:18px;border-top:1px solid var(--line);padding-top:8px}.voice-panel,.voice-playback{max-width:900px;margin:28px auto;border:2px solid #bed7ca}.voice-panel .section-title{margin-top:0}.voice-target{font-size:30px;line-height:1.7;margin:15px 0}.voice-panel>.small{margin:16px 0}.voice-panel audio,.voice-playback audio{max-width:100%;min-width:240px;min-height:50px}.voice-panel .notice{margin-top:15px}.recording-button{border:0;background:#a34737;color:white;border-radius:12px;padding:13px 20px;min-height:48px}.voice-playback p{margin:10px 0;white-space:pre-line}.teacher-aside{position:sticky;top:20px}.large-text .chat-message p,.large-text .lesson-steps p{font-size:21px}
@media(max-width:1180px){.diagnostic-welcome{padding:30px}.welcome-copy h1{font-size:31px}.diagnostic-subjects{gap:12px}.diagnostic-subjects .paper{padding:20px}.teacher-layout{grid-template-columns:1fr}.teacher-aside{position:static}.suggested-prompts{display:flex;flex-wrap:wrap}.word-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:1000px){.diagnostic-subjects{grid-template-columns:1fr}.diagnostic-subjects .paper{padding:24px}.lesson-layout aside{display:block}.diagnostic-profile{padding:25px}.diagnostic-profile>.avatar{right:20px;top:22px;width:42px;height:42px}.diagnostic-profile h2{font-size:22px}}
@media(max-width:760px){.diagnostic-welcome{padding:26px;grid-template-columns:1fr;position:relative;min-height:290px}.welcome-copy{position:relative;z-index:1}.welcome-copy h1{font-size:28px}.welcome-copy p{font-size:14px;max-width:90%}.welcome-art{position:absolute;right:-35px;bottom:-10px;width:185px;opacity:.27}.diagnostic-profiles{grid-template-columns:1fr;gap:16px;margin:20px 0}.diagnostic-profile{padding:25px}.diagnostic-profile .primary-button{font-size:14px}.diagnostic-profile h2{font-size:24px}.diagnostic-parent-note p{font-size:14px}.quiz-top{align-items:flex-start}.quiz-top>span{font-size:12px;white-space:nowrap;padding-top:10px}.reading-passage{font-size:18px;padding:18px}.diagnostic-subjects{gap:15px}.word-form{display:grid;gap:5px}.word-form .primary-button{margin-top:15px}.word-grid{grid-template-columns:1fr}.chat-paper{padding:22px 17px}.chat-message{padding:17px;max-width:96%}.chat-message p{font-size:17px}.chat-actions{flex-wrap:wrap}.teacher-identity p{max-width:170px}.teacher-identity>.badge{font-size:9px}.voice-target{font-size:27px}.nav-group .nav-button{min-height:46px}.sidebar .nav-group{scrollbar-width:thin}.side-bottom{display:block}.side-bottom .side-note,.side-bottom .version-note{display:none}.side-bottom>.nav-button{display:inline-flex;margin-top:7px;font-size:11px}.field input,.field select{font-size:16px}.speech-row .toolbar{gap:6px}.voice-panel audio{min-width:0;width:100%}.voice-playback audio{width:100%}}

.cloud-strip{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;padding:12px 16px;background:#eaf2ed;border-radius:12px;margin-bottom:22px;font-size:13px;color:#32584d}.cloud-strip a{color:#267467;font-weight:700;text-decoration:underline}.cloud-strip:has([role="alert"]){background:#fff2dd}