body.academy-theme #main-content.clean-materials{--reader-ink:#29272a;--reader-muted:#68636a;--reader-line:#e7e2dd;--reader-paper:#fff;--reader-warm:#faf8f4;--reader-accent:#b53828;--reader-soft:#fff0e9;font-family:var(--font-landing),Arial,sans-serif;background:var(--reader-paper);color:var(--reader-ink)}body.academy-theme #main-content.clean-materials:has(>.lms-clean) .materials-layout{grid-template-columns:240px minmax(0,1fr)}body.academy-theme #main-content.clean-materials .materials-layout>.material-index{padding:24px 14px;background:var(--reader-warm)!important;border-color:var(--reader-line)!important}body.academy-theme #main-content.clean-materials .material-level-select{color:var(--reader-muted);gap:8px;margin-bottom:24px;font-size:12px}body.academy-theme #main-content.clean-materials .material-level-select select{min-height:46px;color:var(--reader-ink);background:#fff;border:1px solid #cbc5be;border-radius:10px;font-size:14px}body.academy-theme #main-content.clean-materials .index-heading{justify-content:space-between;align-items:center;gap:12px;margin:0 8px 14px;display:flex}body.academy-theme #main-content.clean-materials .index-heading h2{color:var(--reader-ink);margin:0;font-size:14px}body.academy-theme #main-content.clean-materials .index-heading>span{color:var(--reader-muted);font-size:12px}body.academy-theme #main-content.clean-materials .reader-search{border-color:var(--reader-line);background:#fff;border-radius:9px;min-height:44px;margin-bottom:14px}body.academy-theme #main-content.clean-materials .reader-search input{font:inherit;color:var(--reader-ink);min-width:0;font-size:14px}body.academy-theme #main-content.clean-materials .chapter-link{border:1px solid #0000;border-radius:10px;margin-bottom:4px;padding:13px 8px;transition:background .18s,color .18s}body.academy-theme #main-content.clean-materials .chapter-link strong{color:var(--reader-ink);font-size:13px;font-weight:550;line-height:1.65}body.academy-theme #main-content.clean-materials .chapter-link .chapter-order{color:var(--reader-muted);font-size:11px}body.academy-theme #main-content.clean-materials .chapter-link[aria-current=page]{background:var(--reader-soft);color:#982d24;box-shadow:none;border-color:#e9c4b6}body.academy-theme #main-content.clean-materials .chapter-link[aria-current=page] strong{color:#982d24;font-weight:750}body.academy-theme #main-content.clean-materials .chapter-reading-percent{color:var(--reader-muted);background:0 0;min-width:32px;padding:3px 0;font-size:11px!important}body.academy-theme #main-content.clean-materials .chapter-link:hover{background:#f0ece6}body.academy-theme #main-content.clean-materials:has(>.lms-clean) .material-article{max-width:920px;min-height:calc(100dvh - 60px);box-shadow:none;background:#fff;border:0;border-radius:0;padding:30px clamp(24px,3.6vw,56px) 28px}.teaching-chapter-header{border-bottom:1px solid var(--reader-line);padding-bottom:20px}body.academy-theme #main-content.clean-materials .material-breadcrumb{color:var(--reader-muted);gap:12px;margin:0 0 8px;font-size:12px}body.academy-theme #main-content.clean-materials .teaching-chapter-header h1{letter-spacing:-.025em;color:var(--reader-ink);overflow-wrap:anywhere;margin:0;font-size:clamp(19px,1.8vw,23px);font-weight:700;line-height:1.45}body.academy-theme #main-content.clean-materials .reader-mode{min-height:24px;margin:18px 0 0}body.academy-theme #main-content.clean-materials .reader-mode .reading-progress{color:var(--reader-muted);border:0;margin:0;padding:0;font-size:12px;font-weight:600}body.academy-theme #main-content.clean-materials .reading-track{background:#eeeae5;border-radius:4px;height:3px;margin:8px 0 28px}body.academy-theme #main-content.clean-materials .reading-track>span{background:var(--reader-accent);height:100%;display:block}body.academy-theme #main-content.clean-materials .study-content .study-section{background:0 0;border:0;margin:0;padding:0}body.academy-theme #main-content.clean-materials .study-section>h2{letter-spacing:-.025em;color:var(--reader-ink);overflow-wrap:anywhere;scroll-margin-top:24px;margin:0 0 22px!important;font-size:clamp(23px,2.3vw,29px)!important;line-height:1.4!important}body.academy-theme #main-content.clean-materials .study-section h2:focus{outline:0}body.academy-theme #main-content.clean-materials .study-section h2:focus-visible{outline:3px solid var(--reader-accent);outline-offset:6px;border-radius:3px}body.academy-theme #main-content.clean-materials :is(.study-explanation p,.teaching-practice-intro){color:#4e494f;max-width:68ch;margin:16px 0;font-size:16px;line-height:1.8}body.academy-theme #main-content.clean-materials .complete-study-examples{gap:14px;margin:0 0 22px}body.academy-theme #main-content.clean-materials .complete-study-examples .focus-example{border:1px solid var(--reader-line);background:var(--reader-warm);box-shadow:none;border-radius:14px;padding:22px 24px}body.academy-theme #main-content.clean-materials .focus-example>.focus-instruction{display:none}body.academy-theme #main-content.clean-materials .focus-example>strong{color:var(--reader-ink);font-weight:550;font-size:clamp(28px,3vw,36px)!important;line-height:1.55!important}body.academy-theme #main-content.clean-materials .focus-example .study-pinyin{color:#a43125;font-size:18px!important;line-height:1.65!important}body.academy-theme #main-content.clean-materials .focus-example>p{color:#4e494f;margin:8px 0 16px;font-size:16px;line-height:1.65}body.academy-theme #main-content.clean-materials .focus-example .course-audio-player{margin-bottom:0}body.academy-theme #main-content.clean-materials .teaching-pronunciation-note{background:var(--reader-warm);color:#565057;border-left:3px solid #d9bbaa;border-radius:0 8px 8px 0;margin:22px 0 0;padding:12px 16px;font-size:14px;line-height:1.8}body.academy-theme #main-content.clean-materials .first-sound{background:var(--reader-warm);border:1px solid var(--reader-line);box-shadow:none;color:var(--reader-ink);border-radius:16px;padding:24px}body.academy-theme #main-content.clean-materials .first-sound-example{border-color:var(--reader-line);gap:24px;margin-bottom:18px;padding-bottom:18px}body.academy-theme #main-content.clean-materials .first-sound-example strong{color:var(--reader-ink);font-size:76px;line-height:1.25}body.academy-theme #main-content.clean-materials .first-sound-example>div:first-child>span{color:#a43125;font-size:26px}body.academy-theme #main-content.clean-materials .first-sound>p{color:#4e494f;margin:0 0 20px;font-size:16px;line-height:1.8}.first-sound-parts{grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:0;display:grid}.first-sound-parts>div{text-align:center;border:1px solid var(--reader-line);background:#fff;border-radius:10px;padding:12px 8px}.first-sound-parts dt{color:var(--reader-accent);font-size:25px;font-weight:700;line-height:1.4}.first-sound-parts dd{color:var(--reader-muted);margin:4px 0 0;font-size:12px;line-height:1.5}body.academy-theme #main-content.clean-materials .reading-navigation{border-top:1px solid var(--reader-line);background:0 0;justify-content:space-between;gap:16px;margin:28px 0 0;padding-top:22px;display:flex;position:static}body.academy-theme #main-content.clean-materials .reading-navigation .reader-continue{width:auto;min-width:150px;min-height:50px;box-shadow:none;border-radius:10px;margin-left:auto;padding:12px 25px;font-size:15px;font-weight:700;transition:background .18s;background:var(--reader-accent)!important;color:#fff!important;border:1px solid var(--reader-accent)!important}body.academy-theme #main-content.clean-materials .reading-navigation .reader-continue:hover{background:#932c21!important;border-color:#932c21!important}body.academy-theme #main-content.clean-materials .reading-navigation .reader-continue:disabled{cursor:wait;color:#736d72!important;background:#f1eeea!important;border-color:#e0dad4!important}body.academy-theme #main-content.clean-materials .reader-back{color:var(--reader-muted);min-height:48px;padding:10px 8px;font-size:14px;text-decoration:none}.teaching-next-chapter{min-height:44px;color:var(--reader-muted);text-underline-offset:4px;justify-content:flex-end;align-items:center;gap:8px;margin:14px 0 0;font-size:13px;text-decoration:underline;display:flex}body.academy-theme #main-content.clean-materials .reading-save:has(>[role=status]:only-child){height:0;margin:0;padding:0}body.academy-theme #main-content.clean-materials .reading-save>.sr-only{clip-path:inset(50%);white-space:nowrap!important;border:0!important;width:1px!important;height:1px!important;margin:-1px!important;padding:0!important;position:absolute!important;overflow:hidden!important}body.academy-theme #main-content.clean-materials .independent-practice{background:var(--reader-warm);border-radius:12px;margin-top:24px;padding:20px}body.academy-theme #main-content.clean-materials .independent-practice h2{margin-bottom:12px!important;font-size:18px!important}body.academy-theme #main-content.clean-materials .independent-practice li{color:#4e494f;margin-bottom:10px;font-size:15px;line-height:1.8}body.academy-theme #main-content.clean-materials .material-vocabulary>.sr-only,body.academy-theme #main-content.clean-materials .material-dialogues>.sr-only{clip-path:inset(50%);white-space:nowrap!important;border:0!important;width:1px!important;height:1px!important;margin:-1px!important;padding:0!important;position:absolute!important;overflow:hidden!important}body.academy-theme #main-content.clean-materials .material-vocabulary .study-examples{grid-template-columns:minmax(0,1fr);gap:20px;margin:0}body.academy-theme #main-content.clean-materials .material-vocabulary .study-examples>div{border:1px solid var(--reader-line);background:var(--reader-warm);box-shadow:none;border-radius:14px;padding:24px}body.academy-theme #main-content.clean-materials .material-vocabulary .study-examples strong{color:var(--reader-ink);font-size:30px}body.academy-theme #main-content.clean-materials .material-vocabulary .study-examples p{color:#4e494f;font-size:16px;line-height:1.75}body.academy-theme #main-content.clean-materials .vocabulary-usage-example{border-color:var(--reader-line);margin-top:20px}body.academy-theme #main-content.clean-materials .material-dialogues{border:0;margin:0;padding:0}body.academy-theme #main-content.clean-materials .dialogue-sentence{border-color:var(--reader-line);background:var(--reader-warm);border-radius:12px;padding:18px}body.academy-theme #main-content.clean-materials .material-dialogue>h3{color:var(--reader-ink);margin-top:0;font-size:18px;line-height:1.5}body.academy-theme #main-content.clean-materials .dialogue-sentence-text strong{color:var(--reader-ink);font-size:24px;line-height:1.6}body.academy-theme #main-content.clean-materials .spoken-model-card{border-color:var(--reader-line);background:var(--reader-warm);box-shadow:none;border-radius:14px;padding:22px 24px}body.academy-theme #main-content.clean-materials .spoken-model-card>strong{color:var(--reader-ink);font-size:32px;line-height:1.6}body.academy-theme #main-content.clean-materials .spoken-model-card>.study-pinyin{color:#a43125;font-size:18px;line-height:1.65}body.academy-theme #main-content.clean-materials .spoken-model-card>p{color:#4e494f;font-size:16px;line-height:1.7}body.academy-theme #main-content.clean-materials .material-reader-footer{text-align:center;background:#fff;border:0;margin:0 0 0 240px;padding:12px 24px 24px}body.academy-theme #main-content.clean-materials .material-reader-footer a{min-height:44px;color:var(--reader-muted);align-items:center;font-size:12px;display:inline-flex}body.academy-theme #main-content.clean-materials :is(button,a,select,input):focus-visible{outline:3px solid var(--reader-accent);outline-offset:3px}@media (max-width:899px){body.academy-theme #main-content.clean-materials:has(>.lms-clean) .materials-layout{flex-direction:column;display:flex}body.academy-theme #main-content.clean-materials .materials-layout>.material-index{height:auto;max-height:none;padding:10px 20px;position:static}body.academy-theme #main-content.clean-materials .index-trigger{border-color:var(--reader-line);background:#fff;gap:10px;min-height:46px;font-size:13px}body.academy-theme #main-content.clean-materials .index-trigger>span{text-align:left;flex:1}body.academy-theme #main-content.clean-materials .index-trigger[aria-expanded=true]>svg:last-child{transform:rotate(180deg)}body.academy-theme #main-content.clean-materials .material-index>.index-panel{background:var(--reader-warm)!important;padding:18px 0 0!important}body.academy-theme #main-content.clean-materials .index-panel nav{overscroll-behavior:contain;max-height:45dvh}body.academy-theme #main-content.clean-materials:has(>.lms-clean) .material-article{align-self:center;max-width:780px;min-height:0;padding:24px clamp(20px,5vw,44px)}body.academy-theme #main-content.clean-materials .study-section>h2{scroll-margin-top:90px}body.academy-theme #main-content.clean-materials .material-reader-footer{margin:0;padding:4px 20px 14px}body.academy-theme #main-content.clean-materials .material-level-select select{font-size:16px}}@media (max-width:600px){body.academy-theme #main-content.clean-materials .teaching-chapter-header{padding-bottom:16px}body.academy-theme #main-content.clean-materials .teaching-chapter-header h1{font-size:19px}body.academy-theme #main-content.clean-materials .reader-mode{margin-top:14px}body.academy-theme #main-content.clean-materials .reading-track{margin-bottom:22px}body.academy-theme #main-content.clean-materials .study-section>h2{margin-bottom:18px!important;font-size:23px!important}body.academy-theme #main-content.clean-materials .first-sound{padding:18px}body.academy-theme #main-content.clean-materials .first-sound-example{grid-template-columns:1fr;gap:18px}body.academy-theme #main-content.clean-materials .first-sound-example>div:first-child{text-align:left;grid-template-columns:auto 1fr;align-items:center;column-gap:18px;display:grid}body.academy-theme #main-content.clean-materials .first-sound-example strong{grid-row:span 2;font-size:64px}body.academy-theme #main-content.clean-materials .first-sound-example>div:first-child>span{align-self:end;font-size:25px}body.academy-theme #main-content.clean-materials .first-sound-example>div:first-child>p{align-self:start;margin:0;font-size:15px}body.academy-theme #main-content.clean-materials .complete-study-examples .focus-example{padding:18px}body.academy-theme #main-content.clean-materials .reading-navigation{flex-wrap:nowrap;gap:12px;margin-top:24px}body.academy-theme #main-content.clean-materials .reading-navigation .reader-continue{min-width:140px;padding:12px 20px}body.academy-theme #main-content.clean-materials .material-vocabulary .study-examples>div{padding:18px}body.academy-theme #main-content.clean-materials .study-explanation p{font-size:16px}.first-sound-parts{gap:6px}.first-sound-parts>div{padding:10px 4px}.first-sound-parts dd{font-size:11px}}@media (prefers-reduced-motion:reduce){body.academy-theme #main-content.clean-materials *{scroll-behavior:auto!important;transition:none!important}}.clean-materials .chapter-link[aria-busy=true]{background:#fff0e9;box-shadow:inset 3px 0 #bb3e2c}.chapter-opening{color:#54545c;min-height:400px;padding:32px 0}.chapter-opening p{margin:16px 0 28px;font-size:1rem;font-weight:600}.chapter-opening-indicator{border:3px solid #ece6df;border-top-color:#bb3e2c;border-radius:50%;width:28px;height:28px;animation:.8s linear infinite chapter-loading-spin;display:block}.chapter-opening-line{background:#e9e5df;border-radius:8px;width:85%;height:14px;margin:14px 0}.chapter-opening-line:last-child{width:60%}@keyframes chapter-loading-spin{to{transform:rotate(360deg)}}@media (prefers-reduced-motion:reduce){.chapter-opening-indicator{animation:none}}