:root{--ink:#263e36;--muted:#62736b;--green:#315b49;--soft:#eaf0e5;--bg:#f8f9f5;--line:#dde3d9;--white:#fff;--orange:#9b4e2b;--peach:#f8eee5;--blue:#3e6274;--ice:#eaf1f5;--shadow:0 8px 32px #243e3307;--radius:24px}
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@media(min-width:1550px){.main{padding-top:42px}.hero{padding:42px}.subject-card{padding:28px}}
@media(max-width:1150px){.shell{grid-template-columns:216px minmax(0,1fr)}.sidebar{padding:30px 15px}.main{padding:26px}.topbar{padding-inline:26px}.prototype-strip{padding-inline:26px}.subject-card{padding:20px}.learning-layout{grid-template-columns:minmax(0,1fr)}.lesson-outline{position:static}.lesson-outline .outline-row{display:inline-flex;padding:7px 10px 7px 0;margin-right:8px}.lesson-outline .progress-track{margin-bottom:8px}.lesson-outline .small{margin-bottom:0}}
@media(max-width:900px){.shell{grid-template-columns:1fr}.sidebar{position:fixed;height:auto;top:auto;bottom:0;width:100%;padding:0;z-index:40;border-right:0;border-top:1px solid #d3dcce;background:#f9faf5f5;backdrop-filter:blur(18px)}.brand,.nav-label,.side-note,.sidebar>.parent-btn{display:none}.nav{display:flex;gap:0;justify-content:space-around;padding:7px 4px calc(7px + env(safe-area-inset-bottom))}.nav button{flex:1;min-width:0;min-height:61px;text-align:center;justify-content:flex-start;flex-direction:column;gap:3px;padding:5px 2px;border-radius:10px;font-size:12px;line-height:1.6}.nav button.active{background:#e6eddd;color:var(--green)}.nav button span{max-width:100%;white-space:normal}.nav svg{width:23px;height:23px}.mobile-brand{display:block;font-size:17px;font-weight:600}.context{font-size:12px}.topbar{min-height:80px;padding:16px 24px}.main{padding-bottom:114px}.prototype-strip{padding:9px 24px;flex-wrap:wrap;gap:3px 12px}.top-tools{gap:6px}.ghost,.chip-btn{padding:8px 12px;font-size:12px}.toast{bottom:105px}.learning-panel{padding:26px}.footer-links{flex-wrap:wrap}.card-grid{gap:14px}}
@media(max-width:650px){.topbar{padding:12px 18px;gap:8px}.mobile-brand{font-size:16px}.context{font-size:11px}.top-tools .voice-label{display:none}.top-tools .ghost{padding:8px 10px}.main{padding:22px 18px 114px}.prototype-strip{padding:8px 18px;font-size:11px}.prototype-strip .hide-mobile{display:none}.hero{padding:27px 23px;display:block}.hero h1{font-size:30px;max-width:280px}.hero p{font-size:15px;margin-bottom:12px}.hero-visual{display:none}.hero .buttons{gap:8px;margin-top:19px}.hero .btn{padding:11px 15px;font-size:15px}.hero .btn.text{padding-inline:5px;font-size:14px}.card-grid{grid-template-columns:1fr}.subject-card{padding:20px}.card-top{margin-bottom:12px}.subject-card h3{font-size:22px}.subject-card p{min-height:0;font-size:16px}.substeps{margin:4px 0 12px}.card-bottom{padding-top:10px}.section-heading{margin:24px 0 15px}.section-heading h2{font-size:20px}.section-heading p{font-size:12px}.split{grid-template-columns:1fr;gap:15px}.panel{padding:21px}.week{gap:5px}.day{padding:12px 2px}.day small{font-size:10px}.day>span{font-size:14px}.page-intro h1{font-size:29px}.page-intro p{font-size:15px}.learning-panel{padding:22px 19px;border-radius:19px}.learning-panel h1{font-size:25px}.reading{padding:18px;font-size:19px;line-height:2}.learning-actions{display:grid;grid-template-columns:1fr;gap:10px}.learning-actions>.btn{width:100%}.learning-actions>.buttons{justify-content:space-between;gap:4px}.learning-actions .btn.text{padding:10px 7px;font-size:14px}.english-line{padding:18px;font-size:25px}.stats{gap:9px}.stat{padding:17px 13px}.stat strong{font-size:25px}.stat span{font-size:11px}.word-row{padding:18px;gap:12px;flex-wrap:wrap}.word-row strong{font-size:22px}.word-status{font-size:12px}.word-row>.circle-btn{margin-left:auto}.key-row{gap:3px}.key{min-height:48px;padding:0;font-size:16px}.word-input{font-size:25px;letter-spacing:2px}.modal-head{padding:18px}.modal-body{padding:19px}.modal-head h2{font-size:21px}.scenario-grid{grid-template-columns:1fr 1fr;gap:9px}.scenario-option{padding:12px;font-size:14px}.scenario-option small{font-size:11px}.form-grid{grid-template-columns:1fr}.lesson-outline{padding:19px}.bcrumb{margin-bottom:14px}.phase-chip{font-size:12px}.completion h1{font-size:29px}.summary-row{padding:16px;flex-wrap:wrap}.summary-row .tag{margin-left:0}.notice{padding:14px 16px;font-size:14px}.hanzi{width:104px;height:104px;line-height:104px;font-size:74px}.table-wrap{margin-inline:-8px}th,td{padding:11px 9px;font-size:13px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
@media print{.sidebar,.topbar,.prototype-strip,.buttons,.btn,.toast,.bcrumb,.lesson-outline,.footer-links{display:none!important}.shell{display:block}.main{max-width:100%;padding:0}.panel,.learning-panel{border:0;box-shadow:none}.hanzi{print-color-adjust:exact}.footnote{font-size:10px}}

.mobile-break{display:none}@media(max-width:650px){.mobile-break{display:block}.hero h1{max-width:none;font-size:29px}}
.brand{gap:10px;margin-inline:3px}.brand-mark{flex:0 0 40px;width:40px;height:40px}.brand strong{font-size:16px;letter-spacing:0;white-space:nowrap}.brand small{font-size:12px;letter-spacing:1px}
.family-link{display:inline-flex;align-items:center;justify-content:center;text-decoration:none;color:var(--green)}