.ze-fullscreen-host{--ze-ink:#3e3653;--ze-muted:#7d738a;--ze-purple:#80679d;--ze-line:#e5ddeb;color:var(--ze-ink);font-family:inherit}
.ze-fullscreen-host *{box-sizing:border-box}
.ze-shell{max-width:1240px;margin:0 auto;padding:6px 0 20px}
.ze-shell button{font:inherit;cursor:pointer;transition:background .15s,border-color .15s}
.ze-audio-source{font-size:11px;line-height:1.7;color:#83728f;margin:9px 0 0}
.ze-shell button:disabled{cursor:default;opacity:.46}
.ze-shell button:focus-visible,.ze-shell summary:focus-visible,.ze-shell a:focus-visible{outline:3px solid #b59bd1;outline-offset:3px}
.ze-toolbar{display:flex;gap:18px;justify-content:space-between;align-items:center;margin-bottom:24px}
.ze-kicker{font-size:10px;letter-spacing:1.8px;color:#9b88ad}
.ze-toolbar h1{font-size:29px;line-height:1.4;margin:7px 0;color:var(--ze-ink)}
.ze-toolbar p{font-size:12px;line-height:1.7;color:var(--ze-muted);margin:0}
.ze-toolbar-actions{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.ze-button{min-height:38px;border:1px solid #dcd0e6;border-radius:10px;background:#fff;padding:8px 13px;font-size:12px!important;color:#746088;white-space:nowrap}
.ze-button:hover:not(:disabled){background:#f0e9f7;border-color:#b49cc9}
.ze-button.primary{background:#80679d;color:#fff;border-color:#80679d}
.ze-button.primary:hover:not(:disabled){background:#71558f}
.ze-sections{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:13px;margin:0 0 25px}
.ze-section{display:flex;align-items:center;gap:15px;text-align:left;border:1px solid var(--ze-line);border-radius:16px;padding:20px 19px;background:#fff;color:var(--ze-ink);min-width:0}
.ze-section:hover{background:#faf7fd;border-color:#b69bcc}
.ze-section.selected{border:2px solid #a58bc0;background:#f0eaf7;padding:19px 18px}
.ze-section-symbol{width:42px;min-width:42px;height:42px;display:grid;place-items:center;font-size:31px;color:#85709d;font-family:Arial,sans-serif}
.ze-section strong{display:block;font-size:17px;line-height:1.5;font-weight:650}
.ze-section small{display:block;font-size:11px;line-height:1.7;color:var(--ze-muted);margin-top:4px}
.ze-content-tools{display:flex;justify-content:space-between;gap:16px;align-items:center;flex-wrap:wrap;margin-bottom:13px}
.ze-filters{display:flex;gap:6px;flex-wrap:wrap;align-items:center}
.ze-filter{font-size:12px!important;border:1px solid #e1d7ea;border-radius:9px;padding:8px 12px;min-height:36px;background:#fff;color:#7e6c91}
.ze-filter small{margin-left:3px;font-size:10px;opacity:.8}
.ze-filter.selected{background:#8570a0;border-color:#8570a0;color:#fff}
.ze-print-actions{display:flex;gap:7px;flex-wrap:wrap}
.ze-section-intro{font-size:12px;color:var(--ze-muted);line-height:1.8;margin:0 0 20px}
.ze-workspace{display:grid;grid-template-columns:240px minmax(0,1fr);gap:21px;align-items:start}
.ze-item-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;align-content:start;max-height:700px;overflow:auto;padding:2px 5px 5px 2px;scrollbar-width:thin}
.ze-item{border:1px solid #e5ddec;border-radius:11px;background:#fff;color:#746482;min-width:0}
.ze-item.selected{border-color:#a28bb8;background:#eee7f5;color:#574068;box-shadow:0 2px 5px #80679d08}
.ze-item:hover{border-color:#b7a0cc;background:#f6f1fa}
.ze-item.activity{grid-column:1/-1;display:flex;align-items:center;gap:10px;padding:14px 11px;text-align:left}
.ze-item.activity>span:first-child{font-size:24px;min-width:29px;text-align:center}
.ze-item.activity strong{font-size:13px;line-height:1.6;display:block;font-weight:550}
.ze-item.activity small{font-size:10px;line-height:1.5;display:block;color:#8e7f9c;margin-top:4px}
.ze-item.letter{font-size:21px!important;padding:13px 5px;min-height:57px;font-family:Arial,"PingFang SC",sans-serif}
.ze-main-panel{min-width:0}
.ze-stage{border:1px solid #e5ddeb;border-radius:20px;background:#fff;overflow:hidden;min-height:450px;box-shadow:0 5px 20px #50426004}
.ze-tag{font-size:11px;line-height:1.6;color:#8a789a;letter-spacing:.2px}
.ze-activity-hero{text-align:center;padding:31px 34px 23px;background:linear-gradient(135deg,#f7f7ee,#f4f0fa);border-bottom:1px solid #ece6ee}
.ze-activity-symbol{display:block;font-size:46px;margin-bottom:14px;line-height:1.2}
.ze-activity-hero h2{font-size:29px;color:#58496a;margin:13px 0;line-height:1.5}
.ze-prompt{font-size:16px;line-height:1.9;color:#70617e;margin:13px auto 0;max-width:580px}
.ze-teacher-content{padding:8px 27px 22px}
.ze-teacher-content h3{font-size:13px;color:#756384;margin:19px 0 8px;font-weight:650}
.ze-teacher-content p,.ze-teacher-content li{font-size:12px;line-height:1.9;color:#81738c;margin:0}
.ze-two-column{display:grid;grid-template-columns:1fr 1fr;gap:25px}
.ze-steps{padding-left:21px;margin:0}
.ze-steps li{padding:3px 0 5px 5px}
.ze-steps li::marker{color:#a08ab7;font-weight:700}
.ze-audio-controls{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:8px;margin:20px 0 0}
.ze-audio-status{min-height:20px;margin:10px auto 0;font-size:11px;line-height:1.8;color:#7c658e;max-width:640px}
.ze-step-read{display:inline-flex;align-items:center;margin:5px 0 3px 10px;padding:4px 9px;min-height:29px;border:1px solid #e3d7ec;border-radius:7px;background:#faf7fd;color:#776087;white-space:nowrap;font-size:11px!important;vertical-align:baseline}
.ze-step-read:hover{background:#eee6f5;border-color:#b7a0c9}
.ze-shell.is-presenting .ze-audio-status{font-size:13px}
.ze-shell.is-presenting .ze-audio-controls .ze-button{font-size:14px!important;min-height:42px}
.ze-language-card{text-align:center;padding:30px 34px 26px}
.ze-pinyin-letter{font-family:"Chalkboard SE","Comic Sans MS",Arial,sans-serif;font-size:112px;font-weight:500;color:#57486e;line-height:1.4;margin:9px 0 0}
.ze-tones{display:flex;justify-content:center;gap:14px;margin:5px auto 18px}
.ze-tone{display:flex;flex-direction:column;gap:3px;align-items:center;min-width:65px;min-height:72px;padding:9px 14px;border:1px solid #e7deef;background:#f9f6fc;color:#806895;border-radius:12px}
.ze-tone strong{font-family:"Chalkboard SE","Comic Sans MS",Arial,sans-serif;font-size:30px;font-weight:500;line-height:1.2}
.ze-tone span{font-size:10px;line-height:1.5}
.ze-tone.selected{background:#e8ddef;border-color:#a88cbb;color:#63477d}
.ze-writing-grid{display:block;width:min(100%,400px);height:auto;max-height:188px;margin:0 auto}
.ze-grid-label{font-size:11px;color:#8e7d9d;line-height:1.7;margin:18px 0 6px}
.ze-subtle{font-size:10px;color:#9c8ba8;line-height:1.6;margin:2px 0 12px}
.ze-teaching-note{text-align:left;font-size:12px;color:#7c6b89;line-height:1.9;padding:13px 17px;margin:19px 0 0;background:#f7f4fa;border-radius:12px}
.ze-teaching-note strong{font-size:12px;color:#7c638d;font-weight:600}
.ze-teaching-note p{font-size:12px;margin:5px 0 0;line-height:1.9}
.ze-english-letters{display:flex;align-items:baseline;justify-content:center;gap:28px;font-family:Arial,sans-serif;font-size:112px;color:#635177;line-height:1.5;margin:6px 0 10px}
.ze-english-letters span+span{color:#9d8baf}
.ze-english-example{display:flex;align-items:center;justify-content:center;gap:22px;margin:5px auto 20px}
.ze-word-symbol{font-size:59px;line-height:1.5}
.ze-english-example strong{font-size:28px;line-height:1.6;display:block;color:#675576;font-weight:500;font-family:Arial,sans-serif}
.ze-english-example div{text-align:left}
.ze-english-example div span{font-size:12px;color:#98889f;line-height:1.7;display:block}
.ze-stage-controls{display:flex;align-items:center;justify-content:center;gap:15px;margin:17px 0 4px;flex-wrap:wrap}
.ze-stage-controls>span{font-size:12px;color:#9685a2;min-width:55px;text-align:center}
.ze-status{min-height:22px;text-align:center;font-size:12px;line-height:1.8;color:#83658f;margin:9px 0}
.ze-reference-note{font-size:11px;line-height:1.9;color:#9b8aa6;margin:16px 0 0}
.ze-reference-note summary{cursor:pointer;display:list-item}
.ze-reference-note p{max-width:900px;margin:8px 0}
.ze-reference-note a{color:#8b70a2;text-decoration:underline;text-underline-offset:3px}
.ze-game-workspace{display:block}
.ze-match{text-align:center;background:#fff;border:1px solid #e5ddeb;border-radius:20px;padding:32px 26px;max-width:900px;margin:auto}
.ze-match h2{font-size:25px;color:#655272;line-height:1.5;margin:12px 0}
.ze-match>p{font-size:12px;line-height:1.8;color:#9b88a6}
.ze-match-columns{display:grid;grid-template-columns:1fr 1fr;gap:40px;max-width:530px;margin:29px auto 24px}
.ze-match-columns>div{display:flex;flex-direction:column;gap:12px}
.ze-match-letter{position:relative;border:1px solid #e1d6e8;border-radius:13px;min-height:75px;background:#f9f6fc;color:#79608d;font-size:36px!important;font-family:Arial,sans-serif!important}
.ze-match-letter.selected{background:#eae1f2;border:2px solid #ab8dc3}
.ze-match-letter.matched{background:#edf3e6;border-color:#d5dfc8;color:#8b9d74;opacity:1!important}
.ze-match-letter small{position:absolute;right:15px;top:27px;font-size:17px}
.ze-match-success{color:#7a9361!important;font-size:14px!important}
.ze-shell.is-presenting .ze-sections,.ze-shell.is-presenting .ze-item-list,.ze-shell.is-presenting>.ze-reference-note,.ze-shell.is-presenting>.ze-section-intro{display:none}
.ze-shell.is-presenting .ze-workspace{grid-template-columns:minmax(0,1fr);max-width:960px;margin:auto}
.ze-shell.is-presenting .ze-stage{min-height:440px}
.ze-shell.is-presenting .ze-activity-hero{min-height:410px;display:flex;flex-direction:column;justify-content:center;border-bottom:0;padding:38px}
.ze-shell.is-presenting .ze-activity-symbol{font-size:66px}
.ze-shell.is-presenting .ze-activity-hero h2{font-size:clamp(28px,3.5vw,43px)}
.ze-shell.is-presenting .ze-prompt{font-size:clamp(18px,2vw,25px);max-width:760px}
.ze-shell.is-presenting .ze-pinyin-letter,.ze-shell.is-presenting .ze-english-letters{font-size:clamp(96px,12vw,150px)}
.ze-shell.is-presenting .ze-teaching-note,.ze-shell.is-presenting .ze-teacher-content p,.ze-shell.is-presenting .ze-teacher-content li{font-size:15px}
.ze-fullscreen-host:fullscreen{background:#f8f6fc;color:#3e3653;width:100%;height:100%;max-width:none;margin:0;padding:0;overflow:auto;overscroll-behavior:contain;color-scheme:light}
.ze-fullscreen-host::backdrop{background:#f8f6fc}
.ze-fullscreen-host:fullscreen>.ze-shell{min-height:100%;padding:max(22px,env(safe-area-inset-top)) max(26px,env(safe-area-inset-right)) max(24px,env(safe-area-inset-bottom)) max(26px,env(safe-area-inset-left));max-width:1240px}
@media(max-width:1000px){.ze-section{gap:9px;padding:15px 12px}.ze-section.selected{padding:14px 11px}.ze-section-symbol{width:32px;min-width:32px;font-size:27px}.ze-section strong{font-size:15px}.ze-section small{font-size:10px}.ze-workspace{grid-template-columns:205px minmax(0,1fr);gap:15px}.ze-language-card{padding:25px 22px}.ze-toolbar-actions{gap:6px}}
@media(max-width:720px){.ze-toolbar{align-items:flex-start;gap:10px;flex-wrap:wrap;margin-bottom:18px}.ze-toolbar h1{font-size:25px}.ze-toolbar-actions{width:100%}.ze-sections{gap:8px;margin-bottom:18px}.ze-section{padding:13px 6px;display:block;text-align:center;border-radius:13px}.ze-section.selected{padding:12px 5px}.ze-section-symbol{margin:0 auto 5px;font-size:25px;height:32px}.ze-section strong{font-size:13px}.ze-section small{display:none}.ze-content-tools{gap:10px}.ze-filter{font-size:11px!important;padding:7px 9px}.ze-print-actions{width:100%}.ze-workspace{display:flex;flex-direction:column;gap:13px}.ze-item-list{display:flex;width:100%;max-height:none;overflow-x:auto;gap:7px;padding-bottom:10px}.ze-item.letter{min-width:56px;min-height:48px;flex-shrink:0;font-size:20px!important;padding:10px 8px}.ze-item.activity{min-width:190px;flex-shrink:0;padding:11px}.ze-main-panel{width:100%}.ze-stage{min-height:0}.ze-activity-hero{padding:24px 20px}.ze-activity-hero h2{font-size:24px}.ze-prompt{font-size:15px}.ze-teacher-content{padding:3px 20px 20px}.ze-two-column{grid-template-columns:1fr;gap:0}.ze-language-card{padding:24px 18px 20px}.ze-pinyin-letter,.ze-english-letters{font-size:95px}.ze-tones{gap:8px}.ze-tone{min-width:55px;padding:8px 11px}.ze-stage-controls{gap:9px}.ze-stage-controls>span{min-width:40px}.ze-match{padding:26px 16px}.ze-match h2{font-size:21px}.ze-match-columns{gap:24px}.ze-match-letter{min-height:70px}.ze-match-letter small{top:24px}.ze-shell.is-presenting .ze-stage{min-height:0}.ze-shell.is-presenting .ze-activity-hero{min-height:350px;padding:28px 20px}.ze-fullscreen-host:fullscreen>.ze-shell{padding:max(16px,env(safe-area-inset-top)) max(14px,env(safe-area-inset-right)) max(18px,env(safe-area-inset-bottom)) max(14px,env(safe-area-inset-left))}}
@media(max-height:800px){.ze-fullscreen-host:fullscreen .ze-toolbar{margin-bottom:15px}.ze-fullscreen-host:fullscreen .ze-toolbar h1{font-size:24px}.ze-fullscreen-host:fullscreen .ze-content-tools{margin-bottom:13px}.ze-fullscreen-host:fullscreen .ze-stage{min-height:0}.ze-fullscreen-host:fullscreen .ze-activity-hero{min-height:325px}.ze-fullscreen-host:fullscreen .ze-pinyin-letter,.ze-fullscreen-host:fullscreen .ze-english-letters{font-size:96px}.ze-fullscreen-host:fullscreen .ze-language-card{padding:20px 24px}.ze-fullscreen-host:fullscreen .ze-writing-grid{max-height:145px}.ze-fullscreen-host:fullscreen .ze-tones{margin-bottom:9px}.ze-fullscreen-host:fullscreen .ze-tone{min-height:58px;padding:6px 13px}.ze-fullscreen-host:fullscreen .ze-grid-label{margin-top:12px}}
@media(prefers-reduced-motion:reduce){.ze-shell button{transition:none}}