:root{color-scheme:light;--ink: #1a1a2e;--ink-soft: #2d2d44;--muted: #6b6b80;--muted-light: #9a9aab;--paper: #fdfaf3;--paper-warm: #f8f0e3;--panel: #ffffff;--panel-cream: #fffdf7;--line: #e8e0d0;--line-soft: #f0ebe0;--green: #2d6a4f;--green-dark: #1b4332;--green-light: #d8e8df;--forest: #2d6a4f;--ai-deep-1: #26332c;--ai-deep-2: #1a2420;--ai-deep-3: #101815;--amber: #e8a838;--amber-light: #fdf3d8;--amber-dark: #b8860b;--coral: #e07856;--coral-light: #fce4dc;--coral-dark: #c44d2e;--blue: #4a90b8;--blue-light: #e0eff7;--shadow-sm: 0 4px 12px rgba(45, 45, 68, .06);--shadow-md: 0 8px 24px rgba(45, 45, 68, .08);--shadow-lg: 0 16px 48px rgba(45, 45, 68, .12);--shadow-warm: 0 8px 32px rgba(224, 120, 86, .12);--radius-sm: 6px;--radius-md: 12px;--radius-lg: 20px;--radius-xl: 28px;--font-serif: "Noto Serif SC", "Songti SC", "SimSun", serif;--font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;--font-handwrite: "LXGW WenKai TC", "Noto Serif SC", serif;--bg-overlay-1: rgba(232, 168, 56, .06);--bg-overlay-2: rgba(74, 144, 184, .05);--bg-overlay-3: rgba(45, 106, 79, .04);--header-bg: rgba(253, 250, 243, .92);--header-border: rgba(232, 224, 208, .6);--header-h: 72px;--paper-texture-opacity: .03;font-family:var(--font-sans)}:root[data-theme=dark]{color-scheme:dark;--ink: #e8e6e0;--ink-soft: #c8c4bc;--muted: #9a948a;--muted-light: #b5aea2;--paper: #1a1a24;--paper-warm: #222230;--panel: #26262f;--panel-cream: #2a2a34;--line: #3a3a48;--line-soft: #32323e;--green: #4caf7d;--green-dark: #6bc99a;--green-light: rgba(76, 175, 125, .15);--amber: #f0b850;--amber-light: rgba(240, 184, 80, .12);--amber-dark: #f0b850;--coral: #e88860;--coral-light: rgba(232, 136, 96, .12);--coral-dark: #e88860;--blue: #5a9fc8;--blue-light: rgba(90, 159, 200, .12);--shadow-sm: 0 4px 12px rgba(0, 0, 0, .2);--shadow-md: 0 8px 24px rgba(0, 0, 0, .25);--shadow-lg: 0 16px 48px rgba(0, 0, 0, .35);--shadow-warm: 0 8px 32px rgba(232, 136, 96, .15);--bg-overlay-1: rgba(240, 184, 80, .04);--bg-overlay-2: rgba(90, 159, 200, .03);--bg-overlay-3: rgba(76, 175, 125, .03);--header-bg: rgba(26, 26, 36, .92);--header-border: rgba(58, 58, 72, .6);--paper-texture-opacity: .015}*{box-sizing:border-box}[hidden]{display:none!important}html{scroll-behavior:smooth;scroll-padding-top:80px;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{margin:0;background:radial-gradient(ellipse at 15% 0%,var(--bg-overlay-1),transparent 50%),radial-gradient(ellipse at 85% 10%,var(--bg-overlay-2),transparent 50%),radial-gradient(ellipse at 50% 100%,var(--bg-overlay-3),transparent 60%),var(--paper);color:var(--ink);line-height:1.8;transition:background .4s ease,color .4s ease}a{color:inherit;text-decoration:none}img{display:block;max-width:100%}body:before{content:"";position:fixed;inset:0;pointer-events:none;z-index:0;opacity:var(--paper-texture-opacity);background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 0.9 0 0 0 0 0.85 0 0 0 0 0.7 0 0 0 0.5 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");will-change:opacity}.skip-link{position:absolute;top:-100px;left:16px;z-index:10000;padding:10px 20px;border-radius:0 0 12px 12px;background:var(--green-dark);color:#fff;font-weight:700;font-size:.9rem;transition:top .2s ease}.skip-link:focus{top:0}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}.reveal{opacity:0;transform:translateY(24px);transition:opacity .6s ease,transform .6s ease}.reveal.revealed{opacity:1;transform:translateY(0)}.reading-progress-bar{position:fixed;top:0;left:0;height:3px;z-index:9998;background:linear-gradient(90deg,var(--green),var(--amber));border-radius:0 4px 4px 0;transition:width .1s linear;box-shadow:0 1px 4px #2d6a4f4d}.site-header,.site-footer,main{width:min(1140px,calc(100% - 32px));margin:0 auto;position:relative;z-index:1}.site-header{height:var(--header-h);display:flex;align-items:center;justify-content:space-between;gap:24px;position:sticky;top:0;z-index:100;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);background:var(--header-bg);border-bottom:1px solid var(--header-border)}.brand{display:inline-flex;align-items:center;gap:14px;text-decoration:none}.brand-mark{width:48px;height:48px;display:grid;place-items:center;border-radius:var(--radius-md);background:linear-gradient(135deg,var(--green) 0%,var(--green-dark) 100%);color:#fff;font-family:var(--font-serif);font-weight:900;font-size:1.4rem;box-shadow:4px 4px 0 var(--amber),0 6px 20px #2d6a4f40;transition:transform .3s cubic-bezier(.34,1.56,.64,1),box-shadow .3s ease}.brand:hover .brand-mark{transform:rotate(-6deg) scale(1.05);box-shadow:6px 6px 0 var(--coral),0 8px 24px #2d6a4f4d}.brand strong{display:block;font-family:var(--font-serif);font-size:1.15rem;font-weight:700;color:var(--ink);letter-spacing:.02em}.brand small{display:block;color:var(--muted);margin-top:2px;font-size:.78rem;font-weight:500}.top-nav{display:flex;gap:4px;align-items:center}.top-nav a{min-height:40px;display:inline-flex;align-items:center;justify-content:center;padding:0 16px;border-radius:8px;color:var(--muted);font-weight:600;font-size:.92rem;transition:all .2s ease}.top-nav a:hover{background:var(--green-light);color:var(--green-dark)}.top-nav a.active{color:var(--green-dark);background:var(--green-light);position:relative}.top-nav a.active:after{content:"";position:absolute;bottom:2px;left:50%;transform:translate(-50%);width:60%;height:2px;border-radius:2px;background:var(--green)}:root[data-theme=dark] .top-nav a.active{color:var(--amber);background:#e8a8381f}:root[data-theme=dark] .top-nav a.active:after{background:var(--amber)}.top-nav a:focus-visible,.button:focus-visible,.chip:focus-visible,.grade-jump a:focus-visible,.text-link:focus-visible,.theme-toggle:focus-visible,.lesson-card a:focus-visible,.back-to-top:focus-visible,.skip-link:focus{outline:3px solid rgba(232,168,56,.6);outline-offset:3px;border-radius:4px}.hero,.page-hero,.band,.workflow,.filters,.content-section,.lesson-detail{margin-top:32px}.hero{min-height:540px;display:grid;grid-template-columns:minmax(0,1.1fr) minmax(280px,.9fr);gap:40px;align-items:center;padding:56px;border-radius:var(--radius-lg);background:linear-gradient(135deg,#fdfaf3d9,#f8f0e3bf),var(--hero-image) center / cover no-repeat;box-shadow:var(--shadow-lg);overflow:hidden;position:relative}.hero:after{content:"";position:absolute;top:-60px;right:-60px;width:200px;height:200px;border-radius:50%;background:radial-gradient(circle,rgba(232,168,56,.12),transparent 70%);pointer-events:none}.hero h1,.page-hero h1,.lesson-hero h1{margin:12px 0 20px;max-width:760px;font-family:var(--font-serif);font-size:clamp(2.4rem,6vw,4.5rem);font-weight:700;line-height:1.1;letter-spacing:-.01em;color:var(--ink)}.hero p,.page-hero p,.lesson-hero p{max-width:680px;color:var(--ink-soft);line-height:1.9;font-size:1.08rem}.eyebrow{margin:0;color:var(--green);font-weight:700;font-size:.85rem;letter-spacing:.08em;text-transform:uppercase}.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:32px}.button{min-height:48px;display:inline-flex;align-items:center;justify-content:center;padding:10px 28px;border-radius:8px;border:2px solid var(--green);font-weight:700;font-size:.95rem;text-decoration:none;transition:all .25s ease;cursor:pointer}.button.primary{background:var(--green);color:#fff;box-shadow:0 4px 0 var(--green-dark)}.button.primary:hover{transform:translateY(-2px);box-shadow:0 6px 0 var(--green-dark),0 8px 20px #2d6a4f4d}.button.primary:active{transform:translateY(2px);box-shadow:0 2px 0 var(--green-dark)}.button.secondary{background:#fffc;color:var(--green-dark)}.button.secondary:hover{background:#fff;border-color:var(--green-dark);transform:translateY(-2px);box-shadow:var(--shadow-sm)}.hero-panel{display:grid;gap:16px}.stat{min-height:110px;padding:24px;border-radius:var(--radius-md);background:#ffffffeb;border:1px solid rgba(45,106,79,.12);box-shadow:var(--shadow-sm);backdrop-filter:blur(8px);transition:transform .25s ease,box-shadow .25s ease}.stat:hover{transform:translateY(-3px);box-shadow:var(--shadow-md)}.stat strong{display:block;font-family:var(--font-serif);font-size:2.6rem;font-weight:900;color:var(--coral);line-height:1}.stat span{color:var(--muted);font-weight:600;font-size:.88rem}.section-heading,.workflow{display:flex;justify-content:space-between;gap:28px;align-items:flex-start}.section-heading h2,.workflow h2,.content-section h2,.sources h2,.glossary h2{margin:8px 0 22px;font-family:var(--font-serif);font-size:clamp(1.65rem,3vw,2.4rem);font-weight:700;letter-spacing:-.01em;color:var(--ink);position:relative;padding-left:14px}.section-heading h2:before,.workflow h2:before,.content-section h2:before,.sources h2:before,.glossary h2:before{content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);width:4px;height:70%;border-radius:2px;background:linear-gradient(180deg,var(--green),var(--amber))}.compact-heading{margin-bottom:16px}.compact-heading>p{max-width:360px;margin:8px 0 0;color:var(--muted);line-height:1.8}.card-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}.lesson-card{min-height:100%;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-md);overflow:hidden;box-shadow:var(--shadow-sm);position:relative;transition:transform .3s cubic-bezier(.34,1.56,.64,1),box-shadow .3s ease,border-color .3s ease;content-visibility:auto;contain-intrinsic-size:340px}.lesson-card:before{content:"";display:block;height:5px;background:linear-gradient(90deg,var(--green),var(--amber),var(--coral));border-radius:var(--radius-md) var(--radius-md) 0 0}.lesson-card:hover{transform:translateY(-6px);border-color:#2d6a4f33;box-shadow:var(--shadow-lg)}.lesson-card:hover:before{height:7px;transition:height .3s ease}.lesson-card:focus-within{border-color:var(--green);box-shadow:0 0 0 3px #2d6a4f26,var(--shadow-lg)}.card-image{display:block;aspect-ratio:4 / 3;background:var(--paper-warm);overflow:hidden}.card-image img{width:100%;height:100%;object-fit:cover;border-radius:inherit;transition:transform .4s ease}.lesson-card:hover img{transform:scale(1.06)}.card-body{padding:20px}.meta-row,.meta-list{display:flex;gap:6px;flex-wrap:wrap}.meta-row span,.meta-list span{padding:4px 10px;border-radius:999px;background:var(--green-light);color:var(--green-dark);font-size:.78rem;font-weight:600}.meta-row .meta-readtime{background:var(--amber-light);color:var(--amber-dark)}.lesson-card h3{margin:14px 0 10px;font-family:var(--font-serif);font-size:1.2rem;font-weight:700;color:var(--ink)}.lesson-card h3 a{text-decoration:none;transition:color .2s ease}.lesson-card h3 a:hover{color:var(--green)}.lesson-card p{color:var(--muted);line-height:1.8;font-size:.92rem}.text-link,.back-link{color:var(--green-dark);font-weight:700;text-underline-offset:4px;transition:color .2s ease}.text-link:hover,.back-link:hover{color:var(--coral)}.card-link{display:inline-flex;align-items:center;gap:4px;margin-top:4px}.link-arrow{display:inline-flex;align-items:center;gap:4px;color:var(--green);font-weight:700;font-size:.88rem;transition:gap .2s ease,color .2s ease}.link-arrow:hover{gap:8px;color:var(--green-dark)}.lesson-card:hover .link-arrow{transform:none;gap:8px}.steps{width:min(680px,100%);display:flex;flex-direction:column;gap:8px;padding:0;margin:0;list-style:none}.steps li,.content-section,.filters,.notice,.side-panel section,.glossary,.sources{padding:24px;border-radius:var(--radius-md);background:var(--panel);border:1px solid var(--line);box-shadow:var(--shadow-sm)}.steps strong,.steps span{display:block}.steps strong{font-family:var(--font-serif);font-size:1.05rem;color:var(--green-dark)}.steps span{margin-top:8px;color:var(--muted);line-height:1.7;font-size:.92rem}.page-hero.compact{padding-top:48px;padding-bottom:20px}.page-hero.compact h1{font-size:clamp(2rem,5vw,3.6rem)}.library-hero,.curriculum-hero{display:grid;grid-template-columns:minmax(0,1fr) minmax(240px,320px);gap:24px;align-items:end;padding:48px 48px 40px;border:1px solid var(--line);border-radius:var(--radius-lg);background:linear-gradient(135deg,#fdfaf3e6,#e8e0d080),var(--book-river-image) center / cover;box-shadow:var(--shadow-md)}.library-hero>div,.curriculum-hero>div:first-child{padding-right:12px}.library-note,.curriculum-hero-card{padding:24px;border-radius:var(--radius-md);background:#ffffffe6;border:1px solid rgba(45,106,79,.12);backdrop-filter:blur(8px)}.library-note strong,.curriculum-hero-card strong{display:block;font-family:var(--font-serif);color:var(--coral);font-size:3rem;font-weight:900;line-height:1}.library-note span,.curriculum-hero-card span,.curriculum-hero-card small{display:block;margin-top:8px;color:var(--green-dark);font-weight:700}.progress-track{height:10px;margin-top:16px;overflow:hidden;border-radius:999px;background:var(--line)}.progress-fill{height:100%;border-radius:inherit;background:linear-gradient(90deg,var(--green),var(--amber))}.filters{display:grid;gap:18px;box-shadow:var(--shadow-sm)}.catalog-tools{display:grid;gap:18px;margin-top:22px;padding:24px;border-radius:var(--radius-md);background:var(--panel);border:1px solid var(--line);box-shadow:var(--shadow-sm)}.grade-jump{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:10px}.grade-jump a{min-height:44px;display:grid;place-items:center;border:1px solid rgba(45,106,79,.12);border-radius:8px;background:var(--green-light);color:var(--green-dark);text-decoration:none;font-weight:700;font-size:.9rem;transition:all .2s ease}.grade-jump a:hover{background:var(--green);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow-sm)}.catalog-stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin-top:22px}.search-box{display:grid;gap:8px;font-weight:700}.search-box input{width:100%;min-height:48px;padding:0 16px;border:2px solid var(--line);border-radius:var(--radius-sm);font:inherit;background:var(--panel-cream);transition:border-color .2s ease}.search-box input:focus{outline:none;border-color:var(--green)}.filter-label{display:block;margin-bottom:10px;font-weight:700}.chip-row{display:flex;flex-wrap:wrap;gap:8px}.chip{min-height:40px;display:inline-flex;align-items:center;padding:0 16px;border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--panel-cream);color:var(--muted);font-weight:600;font-size:.9rem;cursor:pointer;transition:all .2s ease}.chip:hover{border-color:var(--green);color:var(--green-dark)}.chip.active{border-color:var(--green);background:var(--green);color:#fff}.lesson-shelves{margin-top:22px;display:grid;grid-template-columns:minmax(0,1fr);gap:28px}.lesson-shelf{padding:24px;border:1px solid var(--line);border-radius:var(--radius-md);background:linear-gradient(180deg,#fffffff2,#fdfaf3fa);box-shadow:var(--shadow-sm)}.shelf-header{display:flex;justify-content:space-between;gap:16px;align-items:flex-end;margin-bottom:16px;padding-bottom:14px;border-bottom:1px solid var(--line)}.shelf-header h2{margin:6px 0 0;font-family:var(--font-serif);font-size:clamp(1.35rem,3vw,2rem)}.shelf-header>span{min-width:72px;min-height:36px;display:inline-grid;place-items:center;padding:0 14px;border-radius:999px;background:var(--green);color:#fff;font-weight:700;white-space:nowrap}.lesson-list{margin-top:0}.empty-state{margin:36px 0;text-align:center;color:var(--muted);font-weight:700}.view-toggle{display:flex;gap:4px;margin-top:22px;padding:4px;border-radius:var(--radius-md);background:var(--panel-cream);border:1px solid var(--line);box-shadow:var(--shadow-sm);width:fit-content}.view-toggle-btn{display:inline-flex;align-items:center;gap:6px;min-height:40px;padding:0 18px;border:none;border-radius:var(--radius-sm);background:transparent;color:var(--muted);font:inherit;font-weight:600;font-size:.9rem;cursor:pointer;transition:all .2s ease}.view-toggle-btn:hover{color:var(--green-dark);background:var(--green-light)}.view-toggle-btn.active{background:var(--green);color:#fff;box-shadow:var(--shadow-sm)}.view-toggle-btn svg{flex-shrink:0}.result-counter{margin:16px 0 0;color:var(--muted);font-size:.85rem;font-weight:600}.lesson-shelf[data-paginated=true]{display:none}.lesson-shelf{content-visibility:auto;contain-intrinsic-size:auto 520px}.load-more-bar{display:grid;place-items:center;margin-top:32px;padding-bottom:20px}.load-more-btn{display:inline-flex;align-items:center;gap:8px;min-height:48px;padding:0 32px;border:2px solid var(--green);border-radius:999px;background:var(--panel);color:var(--green-dark);font:inherit;font-weight:700;font-size:.95rem;cursor:pointer;transition:all .2s ease}.load-more-btn:hover{background:var(--green);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow-md)}.load-more-btn:active{transform:translateY(0)}.unit-view{margin-top:22px;display:grid;gap:24px}.unit-view-group{padding:28px;border-radius:var(--radius-md);background:linear-gradient(180deg,#fdfaf3f2,#fffffffa);border:1px solid var(--line);box-shadow:var(--shadow-sm);scroll-margin-top:92px;content-visibility:auto;contain-intrinsic-size:auto 400px}.unit-view-header{display:flex;justify-content:space-between;gap:16px;align-items:flex-end;margin-bottom:18px;padding-bottom:14px;border-bottom:1px solid var(--line)}.unit-view-header h2{margin:6px 0 0;font-family:var(--font-serif);font-size:clamp(1.35rem,3vw,2rem)}.unit-view-units{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(280px,100%),1fr));gap:20px}.unit-view-unit{padding:16px;border-radius:var(--radius-sm);background:var(--panel-cream);border:1px solid var(--line-soft)}.unit-view-unit h3{margin:0 0 10px;font-size:.95rem;font-weight:700;color:var(--green-dark);padding-bottom:8px;border-bottom:2px solid var(--green-light)}.unit-view-unit ul{list-style:none;margin:0;padding:0;display:grid;gap:2px}.unit-lesson{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:8px 10px;border-radius:var(--radius-sm);transition:background .15s ease}.unit-lesson:hover{background:var(--green-light)}.unit-lesson a{text-decoration:none;font-weight:600;font-size:.9rem;color:var(--ink);transition:color .2s ease}.unit-lesson a:hover{color:var(--green)}.unit-lesson span{font-weight:500;font-size:.9rem;color:var(--muted-light)}.unit-lesson small{flex-shrink:0;padding:2px 8px;border-radius:999px;background:var(--green-light);color:var(--green-dark);font-size:.72rem;font-weight:600}.unit-lesson.found small{background:var(--amber-light);color:var(--amber-dark)}.volume-list{display:grid;gap:24px;margin-top:24px}.publisher-tabs{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px;padding:14px 18px;background:var(--panel-cream);border:1px solid var(--header-border);border-radius:var(--radius-md);box-shadow:0 2px 8px #2d6a4f0d}.publisher-tab{display:inline-flex;align-items:center;gap:8px;padding:8px 18px;border:1.5px solid var(--header-border);border-radius:999px;background:#ffffffb3;color:var(--ink);font:inherit;font-size:.9rem;font-weight:600;cursor:pointer;transition:all .22s cubic-bezier(.34,1.3,.64,1);box-shadow:0 1px 2px #0000000a}.publisher-tab small{font-size:.72rem;font-weight:600;color:var(--muted);padding:1px 8px;border-radius:999px;background:var(--green-light)}.publisher-tab:hover{border-color:var(--green);color:var(--green-dark);transform:translateY(-2px);box-shadow:0 4px 12px #2d6a4f26}.publisher-tab.active{background:linear-gradient(135deg,var(--green),var(--green-dark));border-color:var(--green);color:#fff;box-shadow:0 4px 14px #2d6a4f4d}.publisher-tab.active small{background:#ffffff38;color:#fff}.publisher-group{scroll-margin-top:96px;display:grid;gap:24px}.publisher-group[hidden]{display:none}.publisher-group-header{display:flex;justify-content:space-between;align-items:flex-end;gap:16px;flex-wrap:wrap;margin:36px 0 0;padding-bottom:14px;border-bottom:2px solid var(--line-soft)}.publisher-group-header h2{font-family:var(--font-serif);font-size:clamp(1.3rem,2.6vw,1.7rem);color:var(--ink);margin:4px 0 0}.publisher-group-header .eyebrow{margin:0}.publisher-group-meta{font-size:.85rem;color:var(--muted);font-weight:600;flex-shrink:0}:root[data-theme=dark] .publisher-tab{background:#ffffff0f}.volume-card{position:relative;scroll-margin-top:92px;padding:28px;border-radius:var(--radius-md);background:linear-gradient(180deg,#fdfaf3f2,#fffffffa);border:1px solid var(--line);box-shadow:var(--shadow-sm);overflow:hidden}.volume-card>header{display:flex;justify-content:space-between;gap:18px;align-items:flex-start;margin-bottom:18px}.volume-card h2{margin:6px 0 0;font-family:var(--font-serif);font-size:clamp(1.45rem,3vw,2rem)}.volume-meta{display:grid;justify-items:end;gap:8px}.volume-meta span{color:var(--muted);font-weight:700}.volume-meta small{padding:5px 12px;border-radius:999px;background:var(--green-light);color:var(--green-dark);font-weight:700}.volume-band{height:6px;margin:-4px -28px 20px;border-radius:0;background:linear-gradient(90deg,var(--green),var(--amber))}.volume-band[data-tone=cool]{background:linear-gradient(90deg,var(--blue),var(--green),var(--amber))}.unit-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.unit-card{padding:18px;border-radius:var(--radius-sm);background:var(--panel-cream);border:1px solid var(--line)}.unit-card h3{display:flex;align-items:center;gap:8px;margin:0 0 12px;font-family:var(--font-serif);color:var(--green-dark)}.unit-card h3:before{content:"";width:6px;height:20px;border-radius:999px;background:var(--coral)}.unit-card ul{display:grid;gap:8px;padding:0;margin:0;list-style:none}.unit-card li{display:grid;grid-template-columns:minmax(0,1fr) auto auto;gap:8px;align-items:center;min-height:36px;padding:8px 12px;border-radius:var(--radius-sm);background:var(--panel);border:1px solid transparent;transition:all .2s ease}.unit-card li:hover{border-color:var(--line);box-shadow:var(--shadow-sm)}.unit-card li[data-done=true]{border-color:#4a90b833;background:var(--blue-light)}.unit-card li[data-priority=true][data-done=false]{border-color:#e8a83859;background:var(--amber-light)}.unit-card li a{color:var(--green-dark);font-weight:700;text-underline-offset:4px}.unit-card li span{overflow-wrap:anywhere}.unit-card small,.unit-card em{padding:3px 8px;border-radius:999px;background:var(--green-light);color:var(--green-dark);font-size:.76rem;font-style:normal;font-weight:700;white-space:nowrap}.unit-card em{background:var(--blue-light);color:var(--blue)}.unit-card em.priority{background:var(--amber-light);color:var(--amber-dark)}.reading-progress{position:fixed;top:var(--header-h);left:0;width:0;height:4px;background:linear-gradient(90deg,var(--green),var(--amber),var(--coral));z-index:300;border-radius:0 3px 3px 0;transition:width .1s ease;box-shadow:0 1px 3px #2d6a4f40}.lesson-hero{display:grid;grid-template-columns:minmax(0,1fr) 360px;gap:36px;align-items:center;padding:36px;background:linear-gradient(135deg,#fdfaf3f2,#f8f0e3d9);border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);position:relative;overflow:hidden}.lesson-hero:before{content:"";position:absolute;top:-40px;right:-40px;width:180px;height:180px;border-radius:50%;background:radial-gradient(circle,rgba(232,168,56,.1),transparent 70%);pointer-events:none}.lesson-hero-text,.lesson-hero-image{position:relative;z-index:1}.lesson-hero-image img{width:100%;max-height:500px;object-fit:contain;border-radius:var(--radius-md);box-shadow:var(--shadow-md)}.lesson-subtitle{font-family:var(--font-handwrite);font-size:1.15rem;color:var(--green-dark);font-style:italic}.notice{margin:22px 0;color:#5f4530;background:var(--amber-light);border-color:#ead49b;font-weight:600;border-radius:var(--radius-md);display:flex;align-items:flex-start;gap:10px}.notice-icon{font-size:1.2rem;line-height:1.6;flex-shrink:0}.story-gallery{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;margin:22px 0;grid-auto-flow:dense}.story-gallery figure{margin:0;overflow:hidden;border-radius:var(--radius-md);background:var(--panel);border:1px solid var(--line);box-shadow:var(--shadow-sm);transition:transform .3s ease,box-shadow .3s ease}.story-gallery figure:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}.story-gallery img{width:100%;height:auto;aspect-ratio:4 / 3;object-fit:cover;background:var(--paper-warm)}.story-gallery figcaption{padding:14px 16px;color:var(--green-dark);font-weight:700;font-size:.92rem}.lesson-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:28px;align-items:start}.article-body{padding:40px;border-radius:var(--radius-lg);background:var(--panel);border:1px solid var(--line);box-shadow:var(--shadow-sm)}.article-body h2{margin-top:0;padding-top:20px;font-family:var(--font-serif);font-size:1.6rem;font-weight:700;color:var(--ink);position:relative}.article-body h2:after{content:"";display:block;width:40px;height:3px;margin-top:10px;border-radius:999px;background:linear-gradient(90deg,var(--coral),var(--amber))}.article-body h2:first-child{padding-top:0}.article-body p,.article-body li,.content-section p,.check-list li,.side-panel li,.side-panel p,.sources li{line-height:2;color:var(--ink-soft)}.article-body p{margin-bottom:1.2em}.article-body>p:first-of-type:first-letter{font-family:var(--font-serif);font-size:3.2rem;font-weight:900;float:left;line-height:.9;margin:6px 10px 0 0;color:var(--coral);text-shadow:2px 2px 0 var(--amber-light)}.article-body h3{margin-top:1.8em;margin-bottom:.6em;font-family:var(--font-serif);font-size:1.25rem;font-weight:700;color:var(--green-dark)}.article-body blockquote{margin:1.5em 0;padding:16px 20px;border-left:4px solid var(--amber);background:var(--amber-light);border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:var(--ink-soft);font-style:italic}.article-body strong{color:var(--ink);font-weight:700}.side-panel{display:grid;gap:16px;position:sticky;top:88px}.side-card{padding:24px;border-radius:var(--radius-md);background:var(--panel);border:1px solid var(--line);box-shadow:var(--shadow-sm);position:relative;overflow:hidden}.fun-fact-card{background:linear-gradient(135deg,var(--amber-light),rgba(253,243,216,.5));border-color:#e8a83833}.questions-card{background:linear-gradient(135deg,var(--blue-light),rgba(224,239,247,.5));border-color:#4a90b826}.takeaways-card{background:linear-gradient(135deg,var(--green-light),rgba(216,232,223,.5));border-color:#2d6a4f1f}.side-panel h2{margin:0 0 10px;font-family:var(--font-serif);font-size:1.12rem;color:var(--green-dark);display:flex;align-items:center;gap:8px}.side-icon{font-size:1.1rem;line-height:1}.side-svg-icon{vertical-align:-3px;color:var(--green)}:root[data-theme=dark] .side-svg-icon{color:var(--amber)}.side-panel ol,.side-panel ul,.sources ul,.check-list{padding-left:1.25rem}.side-panel ol li,.side-panel ul li{margin-bottom:8px}.sources{margin-top:24px}.sources h2{display:flex;align-items:center;gap:8px}.glossary{margin-top:24px;background:var(--panel-cream)}.glossary-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}.glossary-hint-demo{background:transparent;color:var(--coral);font-weight:700;padding:0 2px;border-bottom:1px dashed var(--coral)}.explorer-card{margin-top:48px;padding:28px 30px;border:2px dashed rgba(232,168,56,.55);border-radius:var(--radius-lg);background:linear-gradient(150deg,#fdf3d880,#fdfaf3e6);position:relative;overflow:hidden}.explorer-card:after{content:"";position:absolute;top:-40px;right:-40px;width:140px;height:140px;border-radius:50%;background:radial-gradient(circle,rgba(232,168,56,.14),transparent 70%);pointer-events:none}.explorer-header{display:flex;align-items:center;flex-wrap:wrap;gap:12px}.explorer-badge{display:inline-flex;align-items:center;padding:5px 14px;border-radius:999px;background:var(--amber);color:#5c3d05;font-size:.8rem;font-weight:800;letter-spacing:.04em;box-shadow:0 2px 8px #e8a83859}.explorer-header h2{flex:1;min-width:200px;margin:0;font-family:var(--font-serif);font-size:1.3rem;color:var(--ink)}.explorer-toggle{display:inline-flex;align-items:center;gap:6px;padding:9px 18px;border:none;border-radius:999px;background:var(--green);color:#fff;font-size:.85rem;font-weight:700;font-family:inherit;cursor:pointer;transition:background .2s ease,transform .2s ease}.explorer-toggle:hover{background:var(--green-dark);transform:scale(1.04)}.explorer-toggle-icon{transition:transform .25s ease}.explorer-toggle[aria-expanded=true] .explorer-toggle-icon{transform:rotate(180deg)}.explorer-body{margin-top:20px}.explorer-tasks{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.explorer-task{display:flex;gap:12px;padding:18px;border:1px solid var(--line);border-radius:var(--radius-md);background:var(--panel);box-shadow:var(--shadow-sm)}.explorer-task-num{flex-shrink:0;width:28px;height:28px;border-radius:50%;background:var(--amber-light);border:1.5px solid var(--amber);color:var(--amber-dark);font-size:.85rem;font-weight:800;display:flex;align-items:center;justify-content:center}.explorer-task-body h3{margin:0 0 8px;font-size:.98rem;color:var(--green-dark)}.explorer-task-body p{margin:0 0 8px;font-size:.86rem;line-height:1.75;color:var(--ink-soft)}.explorer-task-body p:last-child{margin-bottom:0}.explorer-hint{padding:8px 10px;border-radius:8px;background:var(--amber-light);color:var(--amber-dark)!important;font-size:.8rem!important}.explorer-highlight{color:var(--coral-dark);font-weight:700}.explorer-sources{margin-top:10px;padding-top:10px;border-top:1px dashed var(--line)}.explorer-sources p{font-weight:700;margin-bottom:6px!important}.explorer-sources ul{margin:0;padding-left:18px}.explorer-sources li{font-size:.82rem;line-height:1.9}.explorer-sources a{color:var(--blue);text-decoration:none;border-bottom:1px dashed rgba(74,144,184,.4)}.explorer-sources a:hover{color:var(--green-dark);border-bottom-color:var(--green-dark)}:root[data-theme=dark] .explorer-card{background:linear-gradient(150deg,#3a301e73,#222230e6);border-color:#e8a83866}:root[data-theme=dark] .explorer-header h2{color:var(--ink)}:root[data-theme=dark] .explorer-task{background:#ffffff0a;border-color:#ffffff1a}:root[data-theme=dark] .explorer-hint{background:#e8a83826}@media(max-width:900px){.explorer-tasks{grid-template-columns:1fr}.explorer-card{padding:20px}.explorer-header h2{font-size:1.1rem}}.glossary-card{min-height:150px;padding:18px;border:1px solid var(--line);border-radius:var(--radius-md);background:var(--panel);transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease}.glossary-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:#2d6a4f26}.glossary-card h3{margin:0 0 10px;font-family:var(--font-serif);color:var(--green-dark);font-size:1.18rem;display:inline-block}.glossary-term-clickable{cursor:pointer;border-bottom:1px dashed var(--coral);transition:color .2s ease}.glossary-term-clickable:hover{color:var(--coral)}.glossary-inline-term{all:unset;cursor:pointer;border-bottom:1px dashed var(--coral);color:inherit;font-weight:600;transition:color .2s ease,background .2s ease;border-radius:2px;padding:0 1px;-webkit-tap-highlight-color:rgba(224,120,86,.15)}.glossary-inline-term:hover{color:var(--coral);background:#e0785614}:root[data-theme=dark] .glossary-term-clickable:hover{color:var(--coral)}:root[data-theme=dark] .glossary-inline-term:hover{color:var(--coral);background:#e078561f}.glossary-card rt,.article-body rt{color:var(--coral);font-size:.68em;font-weight:700}.glossary-card p{margin:0;color:var(--ink-soft);line-height:1.8;font-size:.92rem}.article-body ruby{padding:0 2px;text-decoration:underline;text-decoration-color:#e0785659;text-decoration-thickness:2px;text-underline-offset:4px}.article-body .readable-para{cursor:default;border-radius:6px;transition:background .2s ease,box-shadow .2s ease}.article-body.audio-armed .readable-para{cursor:pointer}.article-body.audio-armed .readable-para:hover{background:#2d6a4f0a}.article-body .audio-highlight{background:linear-gradient(180deg,transparent 55%,rgba(232,168,56,.18) 55%);border-radius:6px;box-shadow:inset 3px 0 0 0 var(--green);padding-left:12px;margin-left:-12px;animation:paraFadeIn .4s ease;transition:background .3s ease,box-shadow .3s ease}@keyframes paraFadeIn{0%{opacity:.6;transform:translate(-4px)}to{opacity:1;transform:translate(0)}}.audio-toolbar{display:flex;flex-wrap:wrap;align-items:center;gap:14px;margin-bottom:24px;padding:14px 18px;border-radius:var(--radius-md);background:linear-gradient(135deg,var(--green-light),rgba(216,232,223,.4));border:1px solid rgba(45,106,79,.12)}.audio-toolbar-info{display:flex;align-items:center;gap:6px;font-weight:700;color:var(--green-dark);white-space:nowrap}.audio-icon{font-size:1.2rem}.audio-controls{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.audio-btn{display:inline-flex;align-items:center;gap:5px;min-height:36px;padding:0 14px;border:none;border-radius:var(--radius-sm);background:var(--green);color:#fff;font:inherit;font-size:.85rem;font-weight:600;cursor:pointer;transition:all .2s ease}.audio-btn:hover{background:var(--green-dark);transform:translateY(-1px)}.audio-pause{background:var(--amber)}.audio-pause:hover{background:var(--amber-dark)}.audio-stop{background:var(--coral)}.audio-stop:hover{background:var(--coral-dark)}.audio-speed{display:flex;align-items:center;gap:6px;font-size:.82rem;font-weight:600;color:var(--muted)}.audio-speed select{min-height:34px;padding:0 8px;border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--panel);font:inherit;font-size:.82rem;cursor:pointer}.audio-status{margin-left:auto;font-size:.82rem;color:var(--muted);font-weight:600}.interactive-quiz{margin-top:32px;padding:28px;border-radius:var(--radius-md);background:linear-gradient(180deg,#fffdf7fa,#fdfaf3f2);border:1px solid var(--line);box-shadow:var(--shadow-sm)}.quiz-tabs{display:flex;gap:6px;margin-top:20px;padding:4px;border-radius:var(--radius-md);background:var(--panel-cream);border:1px solid var(--line-soft);width:fit-content;flex-wrap:wrap}.quiz-tab{display:inline-flex;align-items:center;gap:6px;min-height:38px;padding:0 16px;border:none;border-radius:var(--radius-sm);background:transparent;color:var(--muted);font:inherit;font-weight:600;font-size:.88rem;cursor:pointer;transition:all .2s ease}.quiz-tab:hover{color:var(--green-dark);background:var(--green-light)}.quiz-tab.active{background:var(--green);color:#fff}.quiz-panel{margin-top:20px}.quiz-start-screen{text-align:center;padding:32px 20px}.quiz-intro{color:var(--ink-soft);font-size:.95rem;line-height:1.8;max-width:500px;margin:0 auto 20px}.quiz-start-btn{display:inline-flex;align-items:center;gap:6px;min-height:48px;padding:0 32px;border:none;border-radius:999px;background:var(--green);color:#fff;font:inherit;font-weight:700;font-size:1rem;cursor:pointer;transition:all .2s ease}.quiz-start-btn:hover{background:var(--green-dark);transform:translateY(-2px);box-shadow:var(--shadow-md)}.quiz-progress{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px;padding:12px 16px;border-radius:var(--radius-sm);background:var(--panel-cream);border:1px solid var(--line-soft);font-weight:700;font-size:.9rem}.quiz-score{color:var(--green-dark)}.quiz-actions{display:flex;gap:10px;margin-top:16px}.quiz-check-btn{min-height:42px;padding:0 24px;border:none;border-radius:var(--radius-sm);background:var(--green);color:#fff;font:inherit;font-weight:700;cursor:pointer;transition:all .2s ease}.quiz-check-btn:hover{background:var(--green-dark)}.quiz-next-btn{min-height:42px;padding:0 24px;border:2px solid var(--green);border-radius:var(--radius-sm);background:var(--panel);color:var(--green-dark);font:inherit;font-weight:700;cursor:pointer;transition:all .2s ease}.quiz-next-btn:hover{background:var(--green-light)}.dictation-item{display:grid;gap:16px}.dict-play-btn{display:inline-flex;align-items:center;gap:8px;min-height:44px;padding:0 20px;border:2px solid var(--blue);border-radius:999px;background:var(--blue-light);color:var(--blue);font:inherit;font-weight:700;font-size:.9rem;cursor:pointer;transition:all .2s ease;width:fit-content}.dict-play-btn:hover{background:var(--blue);color:#fff}.dict-input-area{display:grid;gap:8px}.dict-input-area label{font-weight:700;font-size:.9rem;color:var(--ink-soft)}.dict-input{width:100%;max-width:300px;min-height:48px;padding:0 16px;border:2px solid var(--line);border-radius:var(--radius-sm);font:inherit;font-size:1.1rem;background:var(--panel);transition:border-color .2s ease}.dict-input:focus{outline:none;border-color:var(--green)}.dict-input:disabled{background:var(--panel-cream);opacity:.8}.dict-feedback{padding:14px 16px;border-radius:var(--radius-sm);font-weight:600;line-height:1.6}.dict-feedback.correct{background:var(--green-light);border:1px solid rgba(45,106,79,.15);color:var(--green-dark)}.dict-feedback.incorrect{background:var(--coral-light);border:1px solid rgba(224,120,86,.15);color:var(--coral-dark)}.feedback-icon{margin-right:4px}.match-question{margin-bottom:20px}.match-prompt{color:var(--muted);font-size:.9rem;margin:0 0 8px}.match-meaning{font-family:var(--font-serif);font-size:1.15rem;color:var(--ink);line-height:1.7;margin:0;padding:16px;border-radius:var(--radius-sm);background:var(--panel-cream);border-left:4px solid var(--green)}.match-options{display:grid;gap:10px}.match-option{display:flex;align-items:center;gap:12px;min-height:52px;padding:0 18px;border:2px solid var(--line);border-radius:var(--radius-sm);background:var(--panel);font:inherit;font-size:1rem;font-weight:600;text-align:left;cursor:pointer;transition:all .2s ease}.match-option:hover:not(:disabled){border-color:var(--green);background:var(--green-light)}.match-option:disabled{cursor:default}.match-option.correct{border-color:var(--green);background:var(--green-light);color:var(--green-dark)}.match-option.incorrect{border-color:var(--coral);background:var(--coral-light);color:var(--coral-dark)}.option-letter{display:grid;place-items:center;width:28px;height:28px;border-radius:50%;background:var(--green-light);color:var(--green-dark);font-size:.82rem;font-weight:800;flex-shrink:0}.match-option.correct .option-letter{background:var(--green);color:#fff}.match-option.incorrect .option-letter{background:var(--coral);color:#fff}.match-feedback{margin-top:16px;padding:14px 16px;border-radius:var(--radius-sm);font-weight:600;line-height:1.6}.match-feedback.correct{background:var(--green-light);border:1px solid rgba(45,106,79,.15);color:var(--green-dark)}.match-feedback.incorrect{background:var(--coral-light);border:1px solid rgba(224,120,86,.15);color:var(--coral-dark)}.quiz-result-screen{text-align:center;padding:28px 20px}.quiz-result-title{font-family:var(--font-serif);font-size:1.5rem;color:var(--green-dark);margin:0 0 10px}.quiz-result-score{font-size:1.2rem;font-weight:800;color:var(--coral);margin:0 0 20px}.quiz-result-detail{display:grid;gap:8px;max-width:500px;margin:0 auto 20px;text-align:left}.result-row{display:flex;align-items:center;gap:10px;padding:10px 14px;border-radius:var(--radius-sm);font-size:.9rem;font-weight:600}.result-row.correct{background:var(--green-light);color:var(--green-dark)}.result-row.incorrect{background:var(--coral-light);color:var(--coral-dark)}.result-term{font-family:var(--font-serif);font-size:1.05rem}.result-pinyin{color:var(--coral);font-size:.82rem}.result-your{margin-left:auto;font-size:.85rem;opacity:.85}.result-mark{font-size:1.1rem}.quiz-restart-btn{display:inline-flex;align-items:center;gap:6px;min-height:44px;padding:0 24px;border:2px solid var(--green);border-radius:999px;background:var(--panel);color:var(--green-dark);font:inherit;font-weight:700;cursor:pointer;transition:all .2s ease}.quiz-restart-btn:hover{background:var(--green);color:#fff}.discuss-intro{margin-bottom:20px}.discuss-intro p{color:var(--ink-soft);line-height:1.8;font-size:.92rem}.discuss-list{display:grid;gap:12px}.discuss-item{border-radius:var(--radius-sm);background:var(--panel-cream);border:1px solid var(--line-soft);overflow:hidden;transition:border-color .2s ease}.discuss-item[open]{border-color:var(--green)}.discuss-question{display:flex;align-items:center;gap:12px;padding:16px 18px;cursor:pointer;list-style:none;font-weight:600;font-size:.95rem;line-height:1.6;color:var(--ink)}.discuss-question::-webkit-details-marker{display:none}.discuss-num{display:grid;place-items:center;width:28px;height:28px;border-radius:50%;background:var(--green);color:#fff;font-size:.82rem;font-weight:800;flex-shrink:0}.discuss-arrow{margin-left:auto;flex-shrink:0;transition:transform .2s ease;color:var(--muted)}.discuss-item[open] .discuss-arrow{transform:rotate(180deg)}.discuss-hint{padding:0 18px 16px 58px}.discuss-hint p{margin:0;color:var(--muted);font-size:.88rem;line-height:1.7}.reflection-writer{margin-top:28px;padding:20px;border-radius:var(--radius-sm);background:linear-gradient(135deg,#2d6a4f0d,#2d6a4f05);border:1.5px dashed var(--green)}.reflection-title{display:flex;align-items:center;gap:8px;margin:0 0 6px;font-size:1.05rem;color:var(--green)}.reflection-hint{margin:0 0 14px;color:var(--muted);font-size:.86rem;line-height:1.6}.reflection-starters{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:12px}.reflection-starter-chip{padding:6px 12px;border-radius:999px;border:1px solid var(--line-soft);background:var(--panel-cream);color:var(--ink-soft);font-size:.78rem;font-family:inherit;cursor:pointer;transition:all .2s ease}.reflection-starter-chip:hover{border-color:var(--green);color:var(--green);background:#2d6a4f12;transform:translateY(-1px)}.reflection-input-wrap{position:relative}.reflection-input{width:100%;padding:14px 64px 14px 16px;border-radius:var(--radius-sm);border:1.5px solid var(--line-soft);background:var(--panel);color:var(--ink);font-size:.95rem;font-family:inherit;line-height:1.8;resize:vertical;min-height:96px;outline:none;transition:border-color .2s ease,box-shadow .2s ease;box-sizing:border-box}.reflection-input:focus{border-color:var(--green);box-shadow:0 0 0 3px #2d6a4f1f}.reflection-input.reflection-shake{animation:reflectionShake .4s ease;border-color:#d4576b}@keyframes reflectionShake{0%,to{transform:translate(0)}25%{transform:translate(-5px)}75%{transform:translate(5px)}}.reflection-voice-btn{position:absolute;right:10px;bottom:10px;display:inline-flex;align-items:center;gap:5px;padding:7px 12px;border-radius:999px;border:1.5px solid var(--green);background:var(--panel);color:var(--green);font-size:.78rem;font-weight:700;font-family:inherit;cursor:pointer;transition:all .2s ease}.reflection-voice-btn:hover{background:var(--green);color:#fff;transform:scale(1.04)}.reflection-voice-btn.listening{background:#d4576b;border-color:#d4576b;color:#fff;animation:reflectionMicPulse 1.2s ease-in-out infinite}@keyframes reflectionMicPulse{0%,to{box-shadow:0 0 #d4576b66}50%{box-shadow:0 0 0 7px #d4576b00}}.reflection-voice-status{margin:8px 0 0;font-size:.82rem;color:var(--muted)}.reflection-actions{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:12px}.reflection-count{font-size:.78rem;color:var(--muted)}.reflection-save-btn{display:inline-flex;align-items:center;gap:6px;padding:9px 18px;border-radius:999px;border:none;background:var(--green);color:#fff;font-size:.88rem;font-weight:700;font-family:inherit;cursor:pointer;transition:all .2s ease}.reflection-save-btn:hover{background:var(--green-dark, #1a5a3e);transform:translateY(-1px);box-shadow:0 4px 12px #2d6a4f4d}.reflection-list{margin-top:18px}.reflection-empty{margin:0;font-size:.85rem;color:var(--muted-light)}.reflection-list-head{margin:0 0 10px;font-size:.85rem;font-weight:700;color:var(--ink-soft)}.reflection-item{padding:12px 14px;border-radius:var(--radius-sm);background:var(--panel-cream);border:1px solid var(--line-soft);margin-bottom:10px}.reflection-time{display:block;font-size:.72rem;color:var(--muted-light);margin-bottom:6px}.reflection-text{margin:0 0 10px;font-size:.92rem;line-height:1.8;color:var(--ink);white-space:pre-wrap;word-break:break-word}.reflection-item-tools{display:flex;gap:8px;flex-wrap:wrap}.reflection-tool-btn{display:inline-flex;align-items:center;gap:4px;padding:4px 10px;border-radius:999px;border:1px solid var(--line-soft);background:transparent;color:var(--muted);font-size:.74rem;font-weight:600;font-family:inherit;cursor:pointer;transition:all .2s ease}.reflection-tool-btn:hover{color:var(--green);border-color:var(--green);background:#2d6a4f12}.reflection-tool-btn.speaking{color:#fff;background:var(--green);border-color:var(--green)}.reflection-del-btn:hover{color:#d4576b;border-color:#d4576b;background:#d4576b12}:root[data-theme=dark] .reflection-writer{background:linear-gradient(135deg,#4caf7d14,#4caf7d08)}:root[data-theme=dark] .reflection-save-btn:hover{box-shadow:0 4px 12px #0006}@media(max-width:640px){.reflection-writer{padding:16px 14px}.reflection-input{padding-right:16px;padding-bottom:52px}.reflection-voice-btn{right:10px;bottom:10px}}.reading-toolbar{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:16px;padding:10px 16px;border-radius:var(--radius-sm);background:var(--panel-cream);border:1px solid var(--line-soft);position:sticky;top:var(--header-h);z-index:50;backdrop-filter:blur(8px)}.font-size-control{display:flex;align-items:center;gap:6px}.toolbar-label{font-size:.82rem;font-weight:700;color:var(--muted);margin-right:4px}.font-btn{display:grid;place-items:center;width:34px;height:34px;border:1.5px solid var(--line);border-radius:var(--radius-sm);background:var(--panel);color:var(--muted);font-family:serif;cursor:pointer;transition:all .2s ease;padding:0}.font-btn[data-size=small]{font-size:.8rem}.font-btn[data-size=medium]{font-size:1rem}.font-btn[data-size=large]{font-size:1.2rem}.font-btn:hover{border-color:var(--green);color:var(--green-dark)}.font-btn.active{border-color:var(--green);background:var(--green);color:#fff}.bookmark-btn{display:inline-flex;align-items:center;gap:6px;min-height:34px;padding:0 14px;border:1.5px solid var(--line);border-radius:var(--radius-sm);background:var(--panel);color:var(--muted);font:inherit;font-size:.85rem;font-weight:600;cursor:pointer;transition:all .2s ease}.bookmark-btn:hover{border-color:var(--amber);color:var(--amber-dark)}.bookmark-btn.bookmarked{border-color:var(--amber);background:var(--amber-light);color:var(--amber-dark)}.bookmark-btn.bookmarked .bookmark-icon{fill:var(--amber)}.article-body.font-small{font-size:.92rem}.article-body.font-small p{font-size:.92rem;line-height:1.85}.article-body.font-large{font-size:1.12rem}.article-body.font-large p{font-size:1.12rem;line-height:1.95}.lesson-toc{display:flex;align-items:center;gap:12px;margin-bottom:16px;padding:10px 16px;border-radius:var(--radius-sm);background:linear-gradient(135deg,var(--green-light),rgba(216,232,223,.3));border:1px solid rgba(45,106,79,.1);flex-wrap:wrap;position:sticky;top:8px;z-index:20}.toc-label{font-size:.82rem;font-weight:800;color:var(--green-dark);white-space:nowrap;flex-shrink:0}.toc-list{list-style:none;margin:0;padding:0;display:flex;gap:4px;flex-wrap:wrap}.toc-list a{display:inline-block;padding:4px 10px;border-radius:999px;font-size:.8rem;font-weight:600;color:var(--muted);text-decoration:none;transition:all .2s ease;white-space:nowrap}.toc-list a:hover{background:var(--green-light);color:var(--green-dark)}.toc-list a.active{background:var(--green);color:#fff}.card-badge{position:absolute;padding:3px 8px;border-radius:999px;font-size:.7rem;font-weight:700;opacity:0;transform:translateY(-4px);transition:all .2s ease;pointer-events:none}.read-badge{top:8px;left:8px;background:var(--green);color:#fff}.bookmark-badge{top:8px;right:8px;background:var(--amber);color:#fff;font-size:.85rem;line-height:1;width:22px;height:22px;display:grid;place-items:center;border-radius:50%;padding:0}.lesson-card.is-read .read-badge,.lesson-card.is-bookmarked .bookmark-badge{opacity:1;transform:translateY(0)}.lesson-card .card-image{position:relative}.reading-stats-bar{margin:12px 0 0;padding:10px 18px;border-radius:var(--radius-sm);background:linear-gradient(135deg,var(--panel-cream),rgba(253,246,232,.6));border:1px solid var(--line-soft);font-size:.85rem;font-weight:600;color:var(--ink-soft)}.reading-stats-bar strong{color:var(--green-dark);font-size:1rem}.not-found{text-align:center;padding:60px 20px;max-width:600px;margin:0 auto}.not-found-illustration{margin-bottom:24px}.not-found h1{font-family:var(--font-serif);font-size:clamp(1.5rem,4vw,2.2rem);color:var(--ink);margin:0 0 16px}.not-found p{color:var(--ink-soft);line-height:1.8;margin:0 0 28px}.not-found-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}.site-footer{margin-top:72px;padding:40px 0 32px;border-top:1px solid var(--line);color:var(--muted);position:relative}.site-footer:before{content:"";position:absolute;top:-1px;left:0;right:0;height:4px;background:linear-gradient(90deg,var(--green),var(--amber),var(--coral),var(--blue));border-radius:0 0 var(--radius-sm) var(--radius-sm)}.footer-content{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap;align-items:flex-start;margin-bottom:20px}.footer-brand{display:flex;align-items:center;gap:14px}.footer-brand .brand-mark.small{width:40px;height:40px;font-size:1.1rem;box-shadow:3px 3px 0 var(--amber)}.footer-brand strong{display:block;font-family:var(--font-serif);font-size:1.05rem;color:var(--ink)}.footer-brand p{margin:2px 0 0;font-size:.85rem;color:var(--muted)}.footer-links{display:flex;gap:20px;align-items:center}.footer-links a{color:var(--green-dark);font-weight:600;font-size:.9rem;transition:color .2s ease}.footer-links a:hover{color:var(--coral)}.footer-note{margin:0;padding-top:16px;border-top:1px dashed var(--line);font-size:.82rem;line-height:1.8}.back-to-top{position:fixed;bottom:32px;right:32px;width:48px;height:48px;display:grid;place-items:center;border:none;border-radius:50%;background:var(--green);color:#fff;cursor:pointer;box-shadow:0 4px 0 var(--green-dark),var(--shadow-md);opacity:0;visibility:hidden;transform:translateY(20px) scale(.8);transition:all .3s cubic-bezier(.34,1.56,.64,1);z-index:200}.back-to-top.visible{opacity:1;visibility:visible;transform:translateY(0) scale(1)}.back-to-top:hover{transform:translateY(-3px) scale(1.05);box-shadow:0 6px 0 var(--green-dark),var(--shadow-lg)}.back-to-top:active{transform:translateY(1px) scale(1);box-shadow:0 2px 0 var(--green-dark)}.lesson-nav{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:28px}.nav-card{display:grid;gap:6px;padding:22px 24px;border-radius:var(--radius-md);background:var(--panel);border:1px solid var(--line);text-decoration:none;transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease}.nav-card:hover{transform:translateY(-3px);border-color:#2d6a4f33;box-shadow:var(--shadow-md)}.nav-next{text-align:right}.nav-label{font-size:.78rem;font-weight:700;color:var(--coral);letter-spacing:.06em;text-transform:uppercase}.nav-title{font-family:var(--font-serif);font-size:1.15rem;font-weight:700;color:var(--green-dark)}.nav-meta{font-size:.82rem;color:var(--muted);font-weight:600}.related-lessons{margin-top:32px}.related-lessons .card-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.check-list{display:grid;gap:10px;list-style:none;padding:0}.check-list li{position:relative;padding-left:28px;line-height:1.9}.check-list li:before{content:"✓";position:absolute;left:0;top:2px;width:20px;height:20px;display:grid;place-items:center;border-radius:50%;background:var(--green-light);color:var(--green);font-size:.75rem;font-weight:900}.feature-strip{margin:28px auto 0;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;justify-items:center;max-width:1080px}.feature-item{width:100%;max-width:260px;padding:24px 20px;border-radius:var(--radius-md);background:var(--panel);border:1px solid var(--line);box-shadow:var(--shadow-sm);text-align:center;transition:transform .25s ease,box-shadow .25s ease}.feature-item:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}.feature-icon{display:flex;align-items:center;justify-content:center;width:56px;height:56px;border-radius:16px;background:linear-gradient(135deg,var(--green-light),rgba(232,168,56,.1));color:var(--green-dark);margin:0 auto 12px;transition:transform .3s ease,box-shadow .3s ease}.feature-icon svg{display:block;margin:0;width:32px;height:32px;flex-shrink:0;transform:translate(.5px,1px)}.feature-icon svg.fi-mask{transform:translate(1px,1.5px)}.feature-icon svg.fi-bulb{transform:translate(1px,3px)}.feature-item:hover .feature-icon{transform:scale(1.08) rotate(-3deg);box-shadow:0 4px 16px #2d6a4f26}:root[data-theme=dark] .feature-icon{background:linear-gradient(135deg,#2d6a4f33,#e8a83814);color:var(--amber)}.feature-item strong{display:block;font-family:var(--font-serif);font-size:1.05rem;color:var(--green-dark);margin-bottom:6px}.feature-item span{display:block;color:var(--muted);font-size:.85rem;line-height:1.7}.grade-jump a{flex-direction:column;gap:6px;min-height:80px}.grade-icon{font-size:1.6rem;line-height:1}.reading-path-band{margin-top:32px;display:grid;grid-template-columns:minmax(0,1.3fr) minmax(280px,.7fr);gap:36px;align-items:center;padding:40px;border-radius:var(--radius-lg);background:linear-gradient(135deg,#d8e8df66,#fdf3d84d);border:1px solid var(--line);box-shadow:var(--shadow-sm)}.reading-path-content>div:first-child{margin-bottom:24px}.reading-path-intro{max-width:520px;color:var(--ink-soft);line-height:1.9;margin-top:12px}.steps-enhanced{width:100%;position:relative;background:var(--panel-cream);border-radius:var(--radius-md);padding:28px 24px;border:1px solid var(--line-soft)}.steps-enhanced:before{content:"";position:absolute;left:18px;top:18px;bottom:18px;width:3px;border-radius:2px;background:linear-gradient(180deg,var(--green),var(--amber),var(--coral));opacity:.4}.steps-enhanced li{position:relative;padding-left:56px;padding-bottom:24px;display:flex;flex-direction:column;align-items:flex-start;gap:3px;overflow:visible}.steps-enhanced li:last-child{padding-bottom:0}.steps-enhanced li strong{display:block;font-family:var(--font-serif);font-size:1.05rem;color:var(--ink);line-height:1.4}.steps-enhanced li>span:last-child{display:block;color:var(--muted);font-size:.92rem;line-height:1.6}.step-number{position:absolute;left:0;top:2px;width:36px;height:36px;display:flex;align-items:center;justify-content:center;border-radius:50%;background:linear-gradient(135deg,var(--green),var(--green-dark));color:#fff;font-family:var(--font-serif);font-weight:700;font-size:1rem;line-height:1;text-align:center;box-shadow:0 3px 0 var(--green-dark),var(--shadow-sm);z-index:2;transition:transform .3s ease;flex-shrink:0}.steps-enhanced li:hover .step-number{transform:scale(1.15)}.steps-enhanced li:after{content:"";position:absolute;left:42px;top:20px;width:0;height:0;border-top:5px solid transparent;border-bottom:5px solid transparent;border-left:7px solid var(--green);opacity:.3}.steps-enhanced li:last-child:after{display:none}.reading-path-illustration{border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-md)}.reading-path-illustration img{width:100%;height:100%;object-fit:cover;min-height:280px}.cta-band{margin-top:40px;padding:56px 40px;border-radius:var(--radius-xl);background:linear-gradient(135deg,var(--green-dark) 0%,var(--green) 100%);text-align:center;position:relative;overflow:hidden}.cta-band:before{content:"";position:absolute;top:-40px;right:-40px;width:200px;height:200px;border-radius:50%;background:radial-gradient(circle,rgba(232,168,56,.2),transparent 70%)}.cta-band:after{content:"";position:absolute;bottom:-60px;left:-60px;width:240px;height:240px;border-radius:50%;background:radial-gradient(circle,rgba(224,120,86,.15),transparent 70%)}.cta-content{position:relative;z-index:1}.cta-content h2{margin:0 0 12px;font-family:var(--font-serif);font-size:clamp(1.8rem,4vw,2.8rem);font-weight:900;color:#fff}.cta-content p{margin:0 0 28px;color:#ffffffd9;font-size:1.1rem}.cta-button{background:var(--amber);border-color:var(--amber);color:var(--ink);box-shadow:0 4px 0 var(--amber-dark);font-size:1.05rem;padding:0 32px}.cta-button:hover{background:var(--amber-dark);border-color:var(--amber-dark);transform:translateY(-2px);box-shadow:0 6px 0 var(--amber-dark),0 8px 20px #e8a8384d}.cta-button:active{box-shadow:0 2px 0 var(--amber-dark)}@keyframes fadeInUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.hero{animation:fadeIn .8s ease}.feature-strip .feature-item:nth-child(1){animation:fadeInUp .5s ease .1s both}.feature-strip .feature-item:nth-child(2){animation:fadeInUp .5s ease .2s both}.feature-strip .feature-item:nth-child(3){animation:fadeInUp .5s ease .3s both}.feature-strip .feature-item:nth-child(4){animation:fadeInUp .5s ease .4s both}.band .card-grid .lesson-card:nth-child(1){animation:fadeInUp .5s ease .1s both}.band .card-grid .lesson-card:nth-child(2){animation:fadeInUp .5s ease .2s both}.band .card-grid .lesson-card:nth-child(3){animation:fadeInUp .5s ease .3s both}.band .card-grid .lesson-card:nth-child(4){animation:fadeInUp .5s ease .4s both}.band{animation:fadeInUp .6s ease both}.reading-path-band{animation:fadeInUp .7s ease both}.cta-band{animation:fadeInUp .6s ease .2s both}@media(max-width:900px){.hero,.library-hero,.curriculum-hero,.lesson-hero,.lesson-layout,.workflow,.story-gallery,.reading-path-band{grid-template-columns:1fr}.feature-strip{grid-template-columns:repeat(2,minmax(0,1fr))}.reading-path-illustration{display:none}.cta-band{padding:40px 24px}.lesson-nav{grid-template-columns:1fr}.audio-toolbar{flex-direction:column;align-items:stretch}.audio-status{margin-left:0}.quiz-tabs{width:100%}.quiz-tab{flex:1;justify-content:center}.related-lessons .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.hero{padding:36px}.card-grid,.catalog-stats,.unit-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.unit-view-units{grid-template-columns:1fr}.glossary-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.section-heading,.workflow{display:block}.side-panel{position:static}}@media(max-width:620px){:root{--header-h: 118px}.site-header{flex-direction:column;align-items:stretch;justify-content:center;gap:8px;padding:10px 0 8px}.brand-mark{width:40px;height:40px;font-size:1.2rem;border-radius:10px;box-shadow:3px 3px 0 var(--amber),0 4px 14px #2d6a4f38}.brand strong{font-size:1.02rem}.brand small{margin-top:1px;font-size:.7rem}.reading-toolbar{top:calc(var(--header-h) + 4px)}.top-nav{width:100%;flex-wrap:nowrap;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none;gap:6px;padding:2px 2px 4px}.top-nav::-webkit-scrollbar{display:none}.top-nav a{flex:0 0 auto;white-space:nowrap;min-height:42px;padding:0 16px;border-radius:999px;font-size:.88rem;background:var(--panel);border:1px solid var(--line)}.top-nav a.active{background:var(--green);border-color:var(--green);color:#fff}.top-nav a.active:after{display:none}:root[data-theme=dark] .top-nav a.active{background:var(--amber);border-color:var(--amber);color:#4a3208}:root[data-theme=dark] .top-nav a.active:after{display:none}.top-nav .nav-search-btn,.top-nav .theme-toggle{flex:0 0 auto;width:42px;height:42px;border-radius:999px;background:var(--panel);border:1px solid var(--line)}.hero{min-height:auto;padding:24px}.hero h1,.lesson-hero h1,.page-hero.compact h1{font-size:2.2rem}.card-grid,.steps,.glossary-grid,.catalog-stats,.unit-grid,.feature-strip{grid-template-columns:1fr}.feature-item{max-width:340px}.volume-card>header,.unit-card li{grid-template-columns:1fr}.volume-card>header{display:block}.volume-meta{justify-items:start;margin-top:12px}.article-body,.lesson-hero{padding:24px}}.theme-toggle{display:grid;place-items:center;width:38px;height:38px;border:1.5px solid var(--line);border-radius:var(--radius-sm);background:var(--panel);color:var(--muted);cursor:pointer;transition:all .3s ease;padding:0;flex-shrink:0;margin-left:4px}.theme-toggle:hover{border-color:var(--green);color:var(--green);background:var(--green-light)}.theme-toggle .theme-icon-sun,.theme-toggle .theme-icon-moon{grid-area:1 / 1;transition:opacity .3s ease,transform .3s ease}:root[data-theme=light] .theme-toggle .theme-icon-moon{opacity:1;transform:rotate(0)}:root[data-theme=light] .theme-toggle .theme-icon-sun{opacity:0;transform:rotate(90deg)}:root[data-theme=dark] .theme-toggle .theme-icon-sun{opacity:1;transform:rotate(0)}:root[data-theme=dark] .theme-toggle .theme-icon-moon{opacity:0;transform:rotate(-90deg)}:root[data-theme=dark] img{opacity:.85}:root[data-theme=dark] img:hover{opacity:1}:root[data-theme=dark] .brand-mark{box-shadow:4px 4px 0 var(--amber),0 6px 20px #4caf7d33}:root[data-theme=dark] .brand:hover .brand-mark{box-shadow:6px 6px 0 var(--coral),0 8px 24px #e8a83833}:root[data-theme=dark] .cta-band{background:linear-gradient(135deg,#1a3d2f,#142e23)}:root[data-theme=dark] .cta-band:before{background:radial-gradient(circle,rgba(232,168,56,.08),transparent 70%)}:root[data-theme=dark] .cta-band:after{background:radial-gradient(circle,rgba(224,120,86,.08),transparent 70%)}:root[data-theme=dark] .lesson-hero{background:var(--panel)}:root[data-theme=dark] .reading-toolbar,:root[data-theme=dark] .audio-toolbar,:root[data-theme=dark] .quiz-progress,:root[data-theme=dark] .interactive-quiz{background:linear-gradient(180deg,#26262ffa,#222230f2);border-color:var(--line)}:root[data-theme=dark] .lesson-toc,:root[data-theme=dark] .reading-stats-bar{background:var(--panel-cream);border-color:var(--line)}:root[data-theme=dark] .toc-list a:hover{background:#4caf7d33}:root[data-theme=dark] .match-option:hover:not(:disabled){background:#4caf7d1a}:root[data-theme=dark] .back-to-top{background:var(--green);color:#fff}:root[data-theme=dark] .hero{background:linear-gradient(135deg,var(--panel) 0%,var(--paper-warm) 100%)}:root[data-theme=dark] .feature-strip{background:var(--panel)}.related-tag{display:inline-block;padding:2px 8px;border-radius:999px;font-size:.72rem;font-weight:600;margin-bottom:4px}.related-tag.same-author{background:var(--amber-light);color:var(--amber-dark)}.related-tag.same-theme{background:var(--green-light);color:var(--green-dark)}.related-tag.same-era{background:var(--coral-light);color:var(--coral-dark)}.related-tag.same-grade{background:var(--blue-light);color:var(--blue)}.related-reason{font-size:.82rem;color:var(--muted);line-height:1.6;margin:4px 0 0}.breadcrumb{display:flex;align-items:center;flex-wrap:wrap;gap:4px;padding:10px 0 4px;font-size:.85rem;color:var(--muted);max-width:880px;margin:0 auto}.breadcrumb a{color:var(--muted);text-decoration:none;transition:color .2s ease}.breadcrumb a:hover{color:var(--green)}.breadcrumb-sep{color:var(--muted-light);font-size:.8rem}.breadcrumb-current{color:var(--ink);font-weight:600}.share-btn{display:inline-flex;align-items:center;gap:6px;min-height:34px;padding:0 14px;border:1.5px solid var(--line);border-radius:var(--radius-sm);background:var(--panel);color:var(--muted);font:inherit;font-size:.85rem;font-weight:600;cursor:pointer;transition:all .2s ease}.share-btn:hover{border-color:var(--blue);color:var(--blue);background:var(--blue-light)}.share-dropdown{position:absolute;z-index:50;margin-top:4px;padding:8px;border-radius:var(--radius-md);background:var(--panel);border:1px solid var(--line);box-shadow:var(--shadow-lg);min-width:180px}.share-item{display:flex;align-items:center;gap:10px;width:100%;min-height:42px;padding:0 14px;border:none;border-radius:var(--radius-sm);background:transparent;color:var(--ink);font:inherit;font-size:.88rem;font-weight:600;cursor:pointer;transition:background .15s ease;text-align:left}.share-item:hover{background:var(--panel-cream)}.share-item svg{flex-shrink:0;color:var(--muted)}.share-qr{margin-top:8px;padding-top:8px;border-top:1px solid var(--line-soft);text-align:center}.share-qr p{margin:8px 0 0;font-size:.78rem;color:var(--muted)}mark.search-highlight{background:var(--amber-light);color:var(--amber-dark);padding:1px 3px;border-radius:3px;font-weight:700}:root[data-theme=dark] mark.search-highlight{background:#f0b85033}.nav-search-btn{display:grid;place-items:center;width:38px;height:38px;border:1.5px solid var(--line);border-radius:var(--radius-sm);background:var(--panel);color:var(--muted);cursor:pointer;transition:all .3s ease;padding:0;flex-shrink:0;margin-left:4px}.nav-search-btn:hover{border-color:var(--green);color:var(--green);background:var(--green-light)}.nav-search-btn:focus-visible{outline:3px solid rgba(232,168,56,.6);outline-offset:3px;border-radius:var(--radius-sm)}.search-overlay{position:fixed;inset:0;z-index:10000;display:none;align-items:flex-start;justify-content:center;padding:10vh 16px 24px;background:#1a1a248c;backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px)}.search-overlay.active{display:flex;animation:search-overlay-in .2s ease}@keyframes search-overlay-in{0%{opacity:0}to{opacity:1}}.search-modal{width:100%;max-width:600px;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);overflow:hidden;opacity:0;transform:translateY(-24px)}.search-overlay.active .search-modal{animation:search-modal-in .25s ease forwards}@keyframes search-modal-in{0%{opacity:0;transform:translateY(-24px)}to{opacity:1;transform:translateY(0)}}:root[data-theme=dark] .search-modal{background:var(--panel);border-color:var(--line)}.search-input-wrap{display:flex;align-items:center;gap:10px;padding:14px 18px;border-bottom:1px solid var(--line-soft)}.search-input-wrap .search-icon{color:var(--muted);flex-shrink:0}.search-input-wrap input{flex:1;min-width:0;border:none;outline:none;background:transparent;color:var(--ink);font-size:1rem;font-family:var(--font-sans);padding:6px 0}.search-input-wrap input::placeholder{color:var(--muted-light)}.search-input-wrap kbd{flex-shrink:0;font-family:var(--font-sans);font-size:.72rem;line-height:1;padding:4px 8px;border-radius:var(--radius-sm);border:1px solid var(--line);background:var(--paper-warm);color:var(--muted)}.search-results{max-height:400px;overflow-y:auto;padding:8px}.search-hint{padding:28px 16px;text-align:center;color:var(--muted);font-size:.9rem;margin:0}.search-result-item{display:block;padding:12px 14px;border-radius:var(--radius-md);text-decoration:none;color:inherit;transition:background .18s ease}.search-result-item:hover,.search-result-item:focus-visible{background:var(--green-light);outline:none}.result-title{font-family:var(--font-serif);font-weight:700;font-size:1rem;color:var(--ink);margin-bottom:4px;display:flex;align-items:center;gap:6px;flex-wrap:wrap}.result-badge{display:inline-block;padding:1px 7px;border-radius:999px;font-size:.68rem;font-weight:700;font-family:var(--font-sans, sans-serif);line-height:1.5}.result-badge-read{background:var(--green);color:#fff}.result-badge-bookmark{background:var(--amber);color:#fff;padding:1px 6px}.result-meta{font-size:.78rem;color:var(--muted);margin-bottom:6px}.result-snippet{font-size:.85rem;color:var(--ink-soft);line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.result-snippet mark{background:var(--amber-light);color:var(--amber-dark);padding:1px 3px;border-radius:3px;font-weight:700}:root[data-theme=dark] .result-snippet mark{background:#f0b85038;color:var(--amber)}@media(max-width:600px){.search-overlay{padding:6vh 0 0;align-items:stretch}.search-modal{max-width:100%;border-radius:0 0 var(--radius-lg) var(--radius-lg)}.search-results{max-height:60vh}}.quiz-ai-section{padding:4px 0}.quiz-ai-header{margin-bottom:20px}.quiz-ai-header h4{font-family:var(--font-serif);font-size:1.15rem;color:var(--ink);margin:0 0 8px}.quiz-ai-desc{font-size:.85rem;color:var(--muted);line-height:1.7;margin:0 0 16px;max-width:560px}.quiz-type-btns{display:flex;gap:10px;flex-wrap:wrap}.quiz-type-btn{min-height:44px;padding:0 22px;border:2px solid var(--line);border-radius:999px;background:var(--panel);color:var(--ink-soft);font:inherit;font-weight:700;font-size:.9rem;cursor:pointer;transition:all .2s ease}.quiz-type-btn:hover{border-color:var(--amber);color:var(--amber-dark);background:var(--amber-light)}.quiz-type-btn.active{border-color:var(--amber);background:var(--amber);color:#fff}:root[data-theme=dark] .quiz-type-btn.active{background:var(--amber);color:#1a1a24}.quiz-ai-body{min-height:120px}.quiz-ai-hint{text-align:center;color:var(--muted);font-size:.92rem;padding:40px 20px;line-height:1.8}.quiz-item{padding:4px 0}.quiz-item-question{font-size:1.02rem;line-height:1.8;color:var(--ink);font-weight:600;margin:0 0 16px;white-space:pre-wrap}.quiz-options{display:grid;gap:10px}.quiz-option{display:flex;align-items:center;gap:12px;min-height:52px;padding:0 18px;border:2px solid var(--line);border-radius:var(--radius-sm);background:var(--panel);color:var(--ink);font:inherit;font-size:1rem;font-weight:600;text-align:left;cursor:pointer;transition:all .2s ease}.quiz-option:hover:not(:disabled){border-color:var(--green);background:var(--green-light)}.quiz-option:disabled{cursor:default}.quiz-option.correct{border-color:var(--green);background:var(--green-light);color:var(--green-dark)}.quiz-option.incorrect{border-color:var(--coral);background:var(--coral-light);color:var(--coral-dark)}.quiz-option.correct .option-letter{background:var(--green);color:#fff}.quiz-option.incorrect .option-letter{background:var(--coral);color:#fff}.quiz-feedback{margin-top:16px;padding:14px 16px;border-radius:var(--radius-sm);font-weight:600;line-height:1.7;font-size:.92rem}.quiz-feedback:empty{display:none}.quiz-feedback.correct{background:var(--green-light);border:1px solid rgba(45,106,79,.15);color:var(--green-dark)}.quiz-feedback.incorrect{background:var(--coral-light);border:1px solid rgba(224,120,86,.15);color:var(--coral-dark)}.quiz-feedback .feedback-icon{margin-right:4px}.quiz-feedback-explain{display:block;margin-top:6px;font-weight:500;font-size:.86rem;opacity:.9}.quiz-loading{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;padding:48px 20px}.quiz-loading span{width:10px;height:10px;border-radius:50%;background:var(--amber);display:inline-block;animation:quizBounce 1.4s ease-in-out infinite both}.quiz-loading span:nth-child(1){animation-delay:-.32s}.quiz-loading span:nth-child(2){animation-delay:-.16s}.quiz-loading p{color:var(--muted);font-size:.9rem;margin:0}@keyframes quizBounce{0%,80%,to{transform:scale(.6);opacity:.5}40%{transform:scale(1);opacity:1}}.quiz-ai-error{text-align:center;padding:32px 20px}.quiz-ai-error p{color:var(--coral-dark);font-weight:600;margin:0}.quiz-ai-result{text-align:center;padding:24px 20px}.quiz-ai-result-hint{color:var(--muted);font-size:.86rem;margin:8px 0 20px}.wrong-answers-section{margin-top:8px}.section-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px}.section-header h3{font-family:var(--font-serif);font-size:1.2rem;color:var(--ink);margin:0}.clear-wrong-btn{min-height:32px;padding:0 14px;border:1px solid var(--coral);border-radius:var(--radius-sm);background:transparent;color:var(--coral-dark);font:inherit;font-size:.8rem;font-weight:600;cursor:pointer;transition:all .2s ease}.clear-wrong-btn:hover{background:var(--coral-light)}.wrong-answers-list{display:grid;gap:16px}.wrong-answer-group{border-radius:var(--radius-md);background:var(--panel);border:1px solid var(--line-soft);overflow:hidden}.wrong-answer-group-header{display:flex;justify-content:space-between;align-items:center;padding:12px 16px;background:var(--panel-cream);border-bottom:1px solid var(--line-soft)}.wrong-answer-group-title{font-family:var(--font-serif);font-weight:700;font-size:.95rem;color:var(--ink)}.wrong-answer-group-count{font-size:.78rem;font-weight:600;color:var(--coral-dark);background:var(--coral-light);padding:2px 10px;border-radius:999px}.wrong-answer-group-body{display:grid;gap:12px;padding:14px 16px}.wrong-answer-card{padding:16px;border-radius:var(--radius-sm);background:var(--panel-cream);border:1px solid var(--line-soft);border-left:4px solid var(--coral)}.wrong-answer-type{display:inline-block;font-size:.72rem;font-weight:700;color:var(--coral-dark);background:var(--coral-light);padding:2px 10px;border-radius:999px;margin-bottom:10px}.wrong-answer-question{font-size:.95rem;line-height:1.7;color:var(--ink);font-weight:600;margin:0 0 12px;white-space:pre-wrap}.wrong-answer-options{display:grid;gap:6px;margin-bottom:12px}.wrong-answer-option{display:flex;align-items:center;gap:10px;padding:8px 14px;border-radius:var(--radius-sm);border:1.5px solid var(--line);background:var(--panel);font-size:.88rem;color:var(--ink-soft)}.wrong-answer-option.is-correct{border-color:var(--green);background:var(--green-light);color:var(--green-dark);font-weight:600}.wrong-answer-option.is-wrong{border-color:var(--coral);background:var(--coral-light);color:var(--coral-dark);font-weight:600}.wrong-answer-option .option-letter{width:22px;height:22px;font-size:.72rem;flex-shrink:0}.wrong-answer-option.is-correct .option-letter{background:var(--green);color:#fff}.wrong-answer-option.is-wrong .option-letter{background:var(--coral);color:#fff}.wrong-answer-option-tag{margin-left:auto;font-size:.72rem;font-weight:700;flex-shrink:0}.wrong-answer-explanation{padding:10px 14px;border-radius:var(--radius-sm);background:var(--amber-light);border:1px solid rgba(232,168,56,.15);font-size:.85rem;line-height:1.7;color:var(--ink-soft);margin-bottom:12px}.wrong-answer-explanation-label{font-weight:700;color:var(--amber-dark);margin-right:4px}.wrong-answer-actions{display:flex;gap:8px;flex-wrap:wrap}.wrong-answer-redo-btn{min-height:34px;padding:0 16px;border:none;border-radius:var(--radius-sm);background:var(--green);color:#fff;font:inherit;font-size:.82rem;font-weight:600;cursor:pointer;transition:all .2s ease}.wrong-answer-redo-btn:hover{background:var(--green-dark)}.wrong-answer-delete-btn{min-height:34px;padding:0 16px;border:1px solid var(--line);border-radius:var(--radius-sm);background:transparent;color:var(--muted);font:inherit;font-size:.82rem;font-weight:600;cursor:pointer;transition:all .2s ease}.wrong-answer-delete-btn:hover{border-color:var(--coral);color:var(--coral-dark);background:var(--coral-light)}.wrong-answers-empty{text-align:center;padding:40px 20px}.wrong-answers-empty-icon{font-size:2.5rem;display:block;margin-bottom:12px}.wrong-answers-empty p{color:var(--muted);margin:0 0 16px}.continue-reading-band{max-width:960px;margin:0 auto 48px;padding:0 24px}.continue-reading-card{display:flex;align-items:center;gap:20px;padding:20px 24px;border-radius:var(--radius-lg);background-color:var(--panel);background-image:linear-gradient(135deg,var(--green-light) 0%,var(--amber-light) 100%);border:1px solid var(--line);box-shadow:var(--shadow-sm);position:relative;overflow:hidden;transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease}.continue-reading-card:before{content:"";position:absolute;left:0;top:0;bottom:0;width:5px;background:linear-gradient(180deg,var(--green),var(--amber))}.continue-reading-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:#2d6a4f40}.continue-reading-icon{flex-shrink:0;display:grid;place-items:center;width:52px;height:52px;border-radius:var(--radius-md);background:var(--panel);color:var(--green-dark);box-shadow:var(--shadow-sm)}.continue-reading-info{flex:1;min-width:0}.continue-reading-label{margin:0 0 4px;font-size:.74rem;font-weight:700;letter-spacing:.06em;color:var(--green-dark);text-transform:uppercase}.continue-reading-title{margin:0 0 4px;font-family:var(--font-serif);font-size:1.15rem;font-weight:700;color:var(--ink);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.continue-reading-meta{margin:0;font-size:.84rem;color:var(--muted)}.continue-reading-link{flex-shrink:0;display:inline-flex;align-items:center;gap:6px;padding:10px 18px;border-radius:999px;background:var(--green);color:#fff;font-size:.9rem;font-weight:700;text-decoration:none;white-space:nowrap;box-shadow:0 4px 0 var(--green-dark);transition:background .2s ease,transform .2s ease,box-shadow .2s ease}.continue-reading-link:hover{background:var(--green-dark);transform:translateY(-2px);box-shadow:0 6px 0 var(--green-dark)}.continue-reading-link:active{transform:translateY(0);box-shadow:0 2px 0 var(--green-dark)}.continue-reading-link svg{transition:transform .2s ease}.continue-reading-link:hover svg{transform:translate(3px)}:root[data-theme=dark] .continue-reading-card{border-color:var(--line);box-shadow:var(--shadow-sm)}:root[data-theme=dark] .continue-reading-icon{background:var(--panel-cream)}@media(max-width:600px){.continue-reading-band{padding:0 16px;margin-bottom:36px}.continue-reading-card{flex-wrap:wrap;gap:14px;padding:16px}.continue-reading-icon{width:44px;height:44px}.continue-reading-title{font-size:1.02rem;white-space:normal}.continue-reading-link{width:100%;justify-content:center}}.tool-btn{display:inline-flex;align-items:center;gap:6px;min-height:34px;padding:0 14px;border:1.5px solid var(--line);border-radius:var(--radius-sm);background:var(--panel);color:var(--ink);font:inherit;font-size:.85rem;font-weight:600;cursor:pointer;transition:all .2s ease}.tool-btn:hover{border-color:var(--green);color:var(--green);box-shadow:0 2px 8px #0000000f}.tool-btn svg{flex-shrink:0}.kg-detail-panel{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:20px;margin-top:16px;box-shadow:var(--shadow-sm)}.kg-detail-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}.kg-detail-header h3{margin:0;font-size:1.1rem;color:var(--ink)}.kg-detail-close{background:none;border:none;font-size:1.5rem;cursor:pointer;color:var(--muted);padding:0;line-height:1}.kg-detail-close:hover{color:var(--coral)}.kg-detail-meta{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:16px}.kg-detail-meta span{background:var(--green-light);color:var(--green-dark);padding:4px 10px;border-radius:12px;font-size:13px}.kg-detail-links h4{font-size:.9rem;color:var(--muted);margin-bottom:8px}.kg-detail-link-group{margin-bottom:12px}.kg-detail-link-group h5{font-size:.85rem;color:var(--ink);margin-bottom:6px}.kg-detail-link-group ul{list-style:none;padding:0;margin:0}.kg-detail-link-group li{margin-bottom:4px}.kg-detail-link-group a{color:var(--green);text-decoration:none;font-size:14px}.kg-detail-link-group a:hover{text-decoration:underline}.data-transfer-section{margin-bottom:32px}.data-transfer-desc{font-size:.88rem;color:var(--muted);line-height:1.7;margin-bottom:16px}.data-transfer-actions{display:flex;gap:12px;flex-wrap:wrap}.data-btn{display:inline-flex;align-items:center;gap:8px;padding:10px 20px;border-radius:10px;border:2px solid var(--line);background:var(--panel);color:var(--ink-soft);font-size:.9rem;font-weight:600;cursor:pointer;transition:all .2s ease}.data-btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-sm)}.data-export-btn:hover{border-color:var(--green);color:var(--green-dark);background:var(--green-light)}.data-import-btn:hover{border-color:var(--amber);color:var(--amber-dark);background:var(--amber-light)}@media print{.site-header,.site-footer,.back-to-top,.nav-search-btn,.search-overlay,.reading-progress,.breadcrumb,.reading-toolbar,.audio-toolbar,.lesson-toc,.interactive-quiz,.share-dropdown,.lesson-nav,.related-lessons,.continue-reading-band,.notice{display:none!important}body{background:#fff!important;color:#000!important}.lesson-detail{max-width:100%!important;margin:0!important;padding:0!important}.lesson-hero{page-break-after:avoid}.article-body{font-size:12pt!important;line-height:1.8!important}.article-body h2{page-break-after:avoid;border-bottom:1px solid #ccc}.article-body .audio-highlight{background:none!important;box-shadow:none!important;padding-left:0!important;margin-left:0!important}.article-body .readable-para{cursor:default}.glossary-section,.sources{page-break-inside:avoid}a{color:#000!important;text-decoration:none!important}img{max-width:100%!important}}@media(max-width:640px){.breadcrumb{font-size:.78rem;gap:2px}.breadcrumb-sep{font-size:.72rem}.reading-toolbar{flex-wrap:wrap;gap:8px}.font-size-control{flex-wrap:wrap}.audio-toolbar{flex-direction:column;align-items:stretch;gap:8px}.audio-controls{flex-wrap:wrap;gap:6px}.audio-btn{padding:0 10px;font-size:.8rem}.audio-speed{margin-left:0}.audio-status{margin-left:0;font-size:.78rem}.quiz-tabs{flex-direction:column;width:100%}.quiz-tab{width:100%;justify-content:center;min-height:40px}.match-options{gap:8px}.match-option{min-height:48px;padding:0 12px;font-size:.95rem}.toc-list{gap:2px}.toc-list a{font-size:.75rem;padding:3px 8px}.lesson-toc{position:static;flex-direction:column;align-items:flex-start}.share-dropdown{right:12px;left:12px;min-width:auto}.meta-list{flex-wrap:wrap;gap:6px!important}.meta-list span{font-size:.82rem}.grade-jump{grid-template-columns:repeat(2,1fr)!important}.card-grid{grid-template-columns:1fr!important}.font-btn{width:30px;height:30px}.bookmark-btn,.share-btn{min-height:30px;padding:0 10px;font-size:.8rem}.interactive-quiz,.lesson-hero,.article-body{padding:16px!important}.quiz-result-detail{grid-template-columns:1fr}.result-row{flex-wrap:wrap;gap:4px;font-size:.82rem}.result-your{margin-left:0}}@media(hover:none)and (pointer:coarse){.lesson-card a,.match-option,.audio-btn,.font-btn,.bookmark-btn,.share-btn,.quiz-tab,.quiz-start-btn,.quiz-check-btn,.quiz-next-btn{min-height:44px}.chip{min-height:40px}}.dashboard{max-width:880px;margin:0 auto;padding:0 20px 40px;display:grid;gap:32px}.dash-overview{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.dash-stat-card{text-align:center;padding:20px 12px;border-radius:var(--radius-md);background:var(--panel);border:1px solid var(--line);box-shadow:var(--shadow-sm);transition:transform .2s ease}.dash-stat-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}.dash-stat-icon{font-size:1.8rem;margin-bottom:6px}.dash-stat-num{font-family:var(--font-serif);font-size:2rem;font-weight:800;color:var(--green-dark);line-height:1.2}:root[data-theme=dark] .dash-stat-num{color:var(--green)}.dash-stat-label{font-size:.82rem;font-weight:600;color:var(--ink-soft);margin-top:2px}.dash-stat-sub{font-size:.74rem;color:var(--muted);margin-top:4px}.dash-section-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px}.dash-section-head h2{font-family:var(--font-serif);font-size:1.2rem;color:var(--ink);margin:0}.dash-progress-text{font-weight:700;color:var(--green-dark);font-size:.9rem}.dash-progress-bar{height:14px;border-radius:999px;background:var(--panel-cream);border:1px solid var(--line-soft);overflow:hidden}.dash-progress-fill{height:100%;border-radius:999px;background:linear-gradient(90deg,var(--green),var(--green-dark));transition:width .6s ease}.dash-grade-grid{display:grid;gap:12px}.dash-grade-item{padding:12px 16px;border-radius:var(--radius-sm);background:var(--panel);border:1px solid var(--line-soft)}.dash-grade-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}.dash-grade-name{font-weight:700;font-size:.9rem;color:var(--ink)}.dash-grade-count{font-size:.85rem;font-weight:600;color:var(--muted)}.dash-grade-done{color:var(--green-dark);font-weight:800}.dash-grade-bar{height:8px;border-radius:999px;background:var(--panel-cream);overflow:hidden}.dash-grade-fill{height:100%;border-radius:999px;background:linear-gradient(90deg,var(--amber),var(--green));transition:width .6s ease}.dash-badges-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:12px}.badge-item{text-align:center;padding:16px 10px;border-radius:var(--radius-md);background:var(--panel-cream);border:2px solid var(--line-soft);transition:all .3s ease}.badge-item.locked{opacity:.45;filter:grayscale(.8)}.badge-item.unlocked{border-color:var(--amber);background:linear-gradient(135deg,var(--amber-light),var(--panel));box-shadow:0 4px 16px #e8a83826}.badge-icon{font-size:2rem;margin-bottom:6px}.badge-name{font-weight:700;font-size:.85rem;color:var(--ink);margin-bottom:2px}.badge-desc{font-size:.72rem;color:var(--muted);line-height:1.5}.dash-bookmarks-list,.dash-history-list{display:grid;gap:8px}.dash-bookmark-item{display:flex;align-items:center;gap:12px;padding:10px 14px;border-radius:var(--radius-sm);background:var(--panel);border:1px solid var(--line-soft);transition:border-color .2s ease}.dash-bookmark-item:hover{border-color:var(--amber)}.dash-bookmark-link{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink);flex:1;min-width:0}.dash-bookmark-link img{width:48px;height:48px;border-radius:var(--radius-sm);object-fit:cover;flex-shrink:0}.dash-bookmark-info{display:flex;flex-direction:column;gap:2px;min-width:0}.dash-bookmark-info strong{font-size:.95rem;color:var(--ink)}.dash-bookmark-info span{font-size:.78rem;color:var(--muted)}.dash-remove-btn{display:grid;place-items:center;width:32px;height:32px;border:none;border-radius:50%;background:transparent;color:var(--muted);cursor:pointer;transition:all .2s ease;flex-shrink:0}.dash-remove-btn:hover{background:var(--coral-light);color:var(--coral-dark)}.dash-history-item{padding:10px 14px;border-radius:var(--radius-sm);background:var(--panel);border:1px solid var(--line-soft)}.dash-history-link{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink);font-size:.88rem}.dash-history-time{color:var(--muted);font-size:.78rem;font-weight:600;min-width:100px;flex-shrink:0}.dash-history-title{font-weight:600;flex:1}.dash-history-grade{font-size:.78rem;color:var(--green-dark);background:var(--green-light);padding:2px 8px;border-radius:999px;flex-shrink:0}.dash-empty{text-align:center;padding:40px 20px}.dash-empty-icon{font-size:2.5rem;display:block;margin-bottom:12px}.dash-empty p{color:var(--muted);margin:0 0 16px}.dash-clear-btn{min-height:32px;padding:0 14px;border:1px solid var(--coral);border-radius:var(--radius-sm);background:transparent;color:var(--coral-dark);font:inherit;font-size:.8rem;font-weight:600;cursor:pointer;transition:all .2s ease}.dash-clear-btn:hover{background:var(--coral-light)}.dash-goal-card{display:grid;grid-template-columns:1fr 1fr;gap:16px;padding:20px;border-radius:var(--radius-md);background:linear-gradient(135deg,var(--amber-light),var(--panel));border:1px solid var(--line-soft);box-shadow:var(--shadow-sm)}:root[data-theme=dark] .dash-goal-card{background:var(--panel)}.dash-goal-setter{display:flex;align-items:center;justify-content:center;gap:10px;padding:14px;border-radius:var(--radius-sm);background:var(--panel);border:1px solid var(--line-soft)}.goal-adjust{width:36px;height:36px;border:1px solid var(--line);border-radius:50%;background:var(--panel);color:var(--ink);font-size:1.2rem;font-weight:700;cursor:pointer;transition:all .2s ease;display:grid;place-items:center;line-height:1}.goal-adjust:hover{background:var(--green-light);border-color:var(--green);color:var(--green-dark)}.goal-adjust:active{transform:scale(.92)}.goal-num{font-family:var(--font-serif);font-size:1.8rem;font-weight:800;color:var(--green-dark);min-width:36px;text-align:center}:root[data-theme=dark] .goal-num{color:var(--green)}.goal-unit{font-size:.85rem;color:var(--ink-soft);font-weight:600}.dash-streak{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;padding:14px;border-radius:var(--radius-sm);background:var(--panel);border:1px solid var(--line-soft)}.streak-icon{font-size:2rem;line-height:1}.streak-label{font-size:.75rem;color:var(--muted);font-weight:600}.dash-today-status{grid-column:1 / -1;text-align:center;padding:10px;border-radius:var(--radius-sm);background:var(--panel-cream);border:1px dashed var(--line);font-size:.9rem;font-weight:600;color:var(--ink-soft)}.dash-today-status.done{background:var(--green-light);border-color:var(--green);border-style:solid;color:var(--green-dark)}.dash-notes-list{display:grid;gap:12px}.dash-note-item{padding:14px 16px;border-radius:var(--radius-sm);background:var(--panel);border:1px solid var(--line-soft);border-left:3px solid var(--amber);transition:border-color .2s ease}.dash-note-item:hover{border-color:var(--amber)}.dash-note-quote{margin:0 0 8px;padding:6px 12px;border-left:3px solid var(--line);background:var(--panel-cream);border-radius:0 var(--radius-sm) var(--radius-sm) 0;font-size:.85rem;color:var(--ink-soft);font-style:italic;line-height:1.6}.dash-note-text{margin:0 0 10px;font-size:.92rem;color:var(--ink);line-height:1.7}.dash-note-meta{display:flex;align-items:center;gap:12px;flex-wrap:wrap;font-size:.78rem}.dash-note-source{color:var(--green-dark);font-weight:600;text-decoration:none}.dash-note-source:hover{text-decoration:underline}.dash-note-time{color:var(--muted)}.dash-note-delete{margin-left:auto;min-height:28px;padding:0 12px;border:1px solid var(--coral);border-radius:var(--radius-sm);background:transparent;color:var(--coral-dark);font:inherit;font-size:.78rem;font-weight:600;cursor:pointer;transition:all .2s ease}.dash-note-delete:hover{background:var(--coral-light)}.seasonal-band{background:linear-gradient(135deg,var(--amber-light),rgba(253,243,216,.3));border-radius:var(--radius-lg);padding:28px}:root[data-theme=dark] .seasonal-band{background:var(--panel)}.seasonal-grid{grid-template-columns:repeat(auto-fill,minmax(min(200px,100%),1fr))}.seasonal-card-wrapper{display:flex;flex-direction:column}.seasonal-reason{margin:8px 0 0;padding:8px 14px;border-radius:8px;background:linear-gradient(135deg,var(--green-light),var(--amber-light));border:1px solid rgba(232,168,56,.2);font-size:.82rem;font-weight:600;color:var(--green-dark);line-height:1.5}.compare-page{max-width:1100px;margin:0 auto;padding:0 20px 40px}.compare-selector{display:flex;align-items:end;gap:16px;margin-bottom:20px}.compare-select-slot{flex:1;display:flex;flex-direction:column;gap:6px}.compare-select-slot label{font-weight:700;font-size:.88rem;color:var(--ink-soft)}.compare-select{min-height:46px;padding:0 14px;border:2px solid var(--line);border-radius:var(--radius-sm);background:var(--panel);font:inherit;font-size:.9rem;color:var(--ink);cursor:pointer;transition:border-color .2s ease}.compare-select:focus{outline:none;border-color:var(--green)}.compare-search{position:relative;width:100%}.compare-search-input{width:100%;min-height:46px;padding:0 14px;border:2px solid var(--line);border-radius:var(--radius-sm);background:var(--panel);font:inherit;font-size:.9rem;color:var(--ink);transition:border-color .2s ease}.compare-search-input::placeholder{color:var(--muted)}.compare-search-input:focus{outline:none;border-color:var(--green)}.compare-search-list{position:absolute;top:calc(100% + 4px);left:0;right:0;z-index:30;max-height:320px;overflow-y:auto;background:var(--panel);border:1.5px solid var(--line);border-radius:var(--radius-sm);box-shadow:var(--shadow-md);padding:4px}.compare-search-item{display:flex;flex-direction:column;gap:2px;width:100%;padding:8px 10px;border:none;border-radius:var(--radius-sm);background:transparent;text-align:left;cursor:pointer}.compare-search-item:hover,.compare-search-item:focus-visible{background:var(--panel-cream);outline:none}.compare-search-item .cs-title{font-size:.9rem;font-weight:600;color:var(--ink)}.compare-search-item .cs-meta{font-size:.76rem;color:var(--muted)}.compare-search-more{padding:8px 10px;font-size:.76rem;color:var(--muted);text-align:center}.compare-vs{font-family:var(--font-serif);font-size:1.4rem;font-weight:800;color:var(--coral);padding-bottom:10px;flex-shrink:0}.compare-suggestions{margin-bottom:24px}.compare-suggest-label{font-size:.85rem;color:var(--muted);margin:0 0 8px}.compare-suggest-chips{display:flex;gap:8px;flex-wrap:wrap}.suggest-chip{padding:6px 14px;border:1.5px solid var(--line);border-radius:999px;background:var(--panel);color:var(--ink-soft);font:inherit;font-size:.82rem;font-weight:600;cursor:pointer;transition:all .2s ease}.suggest-chip:hover{border-color:var(--green);background:var(--green-light);color:var(--green-dark)}.compare-area{min-height:200px}.compare-empty{text-align:center;padding:60px 20px}.compare-empty-icon{font-size:3rem;display:block;margin-bottom:16px}.compare-empty p{color:var(--muted)}.compare-content{display:grid;gap:24px}.compare-info-row{display:grid;grid-template-columns:1fr 1fr;gap:20px}.compare-info-cell{text-align:center;padding:20px;border-radius:var(--radius-md);background:var(--panel);border:1px solid var(--line)}.compare-info-img{width:120px;height:120px;border-radius:var(--radius-md);object-fit:cover;margin:0 auto 12px;display:block}.compare-info-cell h3{font-family:var(--font-serif);font-size:1.2rem;color:var(--ink);margin:0 0 10px}.compare-info-meta{display:flex;justify-content:center;flex-wrap:wrap;gap:8px;margin-bottom:12px}.compare-info-meta span{font-size:.78rem;font-weight:600;color:var(--muted);padding:3px 10px;border-radius:999px;background:var(--panel-cream)}.compare-info-summary{font-size:.88rem;color:var(--ink-soft);line-height:1.7;margin:0}.compare-dimensions{display:grid;gap:8px}.dim-row{display:grid;grid-template-columns:80px 1fr 40px 1fr;align-items:center;padding:12px 16px;border-radius:var(--radius-sm);background:var(--panel);border:1px solid var(--line-soft);font-size:.88rem}.dim-row.same{border-left:4px solid var(--green)}.dim-row.diff{border-left:4px solid var(--coral)}.dim-label{font-weight:700;color:var(--muted);font-size:.82rem}.dim-val-a,.dim-val-b{font-weight:600;color:var(--ink);text-align:center}.dim-icon{text-align:center;font-size:1.2rem;font-weight:800}.dim-row.same .dim-icon{color:var(--green)}.dim-row.diff .dim-icon{color:var(--coral)}.compare-lessons{display:grid;grid-template-columns:1fr 1fr;gap:20px}.compare-lesson-col{padding:20px;border-radius:var(--radius-md);background:var(--panel);border:1px solid var(--line)}.compare-col-header{font-family:var(--font-serif);font-size:1.1rem;font-weight:700;color:var(--green-dark);margin-bottom:16px;padding-bottom:10px;border-bottom:2px solid var(--green-light)}.compare-col-section{margin-bottom:18px}.compare-col-section h4{font-size:.88rem;font-weight:700;color:var(--ink);margin:0 0 8px}.compare-col-section p{font-size:.85rem;color:var(--ink-soft);line-height:1.7;margin:0}.compare-glossary{display:grid;gap:6px}.compare-glossary-item{display:flex;align-items:baseline;gap:8px;font-size:.82rem}.compare-glossary-item ruby{font-weight:600;color:var(--ink)}.compare-glossary-item span{color:var(--muted)}.compare-questions,.compare-takeaways{margin:0;padding-left:18px;font-size:.85rem;color:var(--ink-soft);line-height:1.7}.compare-questions li,.compare-takeaways li{margin-bottom:4px}.compare-read-link{display:inline-block;margin-top:8px;padding:8px 20px;border-radius:999px;background:var(--green);color:#fff!important;font-weight:700;font-size:.85rem;text-decoration:none;transition:all .2s ease}.compare-read-link:hover{background:var(--green-dark);transform:translateY(-1px)}.difficulty-badge{position:absolute;bottom:8px;left:8px;z-index:2;display:flex;align-items:center;gap:4px;padding:3px 8px;border-radius:999px;background:#000000a6;backdrop-filter:blur(4px);font-size:.72rem;color:#fff;opacity:1!important;transform:none!important;pointer-events:none}.difficulty-stars{color:var(--amber);font-size:.72rem;letter-spacing:-1px}.difficulty-label{font-weight:600;font-size:.68rem;opacity:.9}.timeline-hero{display:flex;justify-content:space-between;align-items:flex-end}.timeline-stats{text-align:right;font-size:.85rem;color:var(--muted)}.timeline-stats strong{font-family:var(--font-serif);font-size:1.4rem;color:var(--green-dark)}.timeline-nav{position:sticky;top:var(--header-h);z-index:30;background:var(--bg);border-bottom:1px solid var(--line-soft);padding:10px 0;margin-bottom:24px}.timeline-track-tag{align-self:center;flex-shrink:0;padding:4px 10px;border-radius:999px;background:var(--green-light);color:var(--green-dark);font-size:.72rem;font-weight:700;letter-spacing:.1em;user-select:none}.timeline-track-tag.topic{background:var(--amber-light);color:var(--amber-dark);margin-left:10px;position:relative}.timeline-track-tag.topic:before{content:"";position:absolute;left:-8px;top:50%;transform:translateY(-50%);width:1px;height:26px;background:var(--line)}.timeline-track{display:flex;gap:8px;overflow-x:auto;scrollbar-width:thin;padding:0 20px;max-width:1100px;margin:0 auto}.timeline-track::-webkit-scrollbar{height:4px}.timeline-track::-webkit-scrollbar-thumb{background:var(--line);border-radius:2px}.timeline-node{display:flex;flex-direction:column;align-items:center;gap:2px;padding:6px 14px;border:1.5px solid var(--line);border-radius:var(--radius-sm);background:var(--panel);cursor:pointer;transition:all .2s ease;white-space:nowrap;flex-shrink:0}.timeline-node:hover{border-color:var(--green);background:var(--green-light)}.timeline-node.active{border-color:var(--green);background:var(--green);color:#fff}.timeline-node.active .timeline-node-count{color:#fffc}.timeline-node-emoji{font-size:1.3rem}.timeline-node-name{font-size:.82rem;font-weight:700}.timeline-node-count{font-size:.7rem;color:var(--muted)}.timeline-node.topic{border-color:var(--amber-light);border-style:dashed}.timeline-node.topic:hover{border-color:var(--amber);background:var(--amber-light)}.timeline-node.topic.active{border-color:var(--amber);border-style:solid;background:var(--amber);color:#fff}.timeline-node.topic.active .timeline-node-count{color:#ffffffd9}.timeline-topic-banner{margin:52px 0 28px;padding:20px 26px;border-radius:var(--radius-md);background:linear-gradient(135deg,var(--amber-light),transparent 65%);border:1px solid var(--amber-light);display:flex;align-items:baseline;gap:16px;flex-wrap:wrap}.timeline-topic-banner h2{font-family:var(--font-serif);font-size:1.35rem;color:var(--amber-dark);margin:0}.timeline-topic-banner p{margin:0;color:var(--muted);font-size:.88rem}.timeline-section{margin-bottom:40px;scroll-margin-top:calc(var(--header-h) + 96px)}.timeline-section-header{display:flex;align-items:center;gap:12px;margin-bottom:16px;padding-bottom:10px;border-bottom:2px solid var(--line-soft)}.timeline-emoji{font-size:2rem}.timeline-section-header h2{font-family:var(--font-serif);font-size:1.5rem;color:var(--ink);margin:0}.timeline-desc{font-size:.85rem;color:var(--muted);margin:2px 0 0}.timeline-count{margin-left:auto;font-size:.82rem;color:var(--muted);font-weight:600}.timeline-note{text-align:center;padding:30px;color:var(--muted);font-size:.88rem}.fillblank-text{font-size:1.1rem;line-height:1.8;color:var(--ink);padding:20px;border-radius:var(--radius-md);background:var(--panel-cream);border:1px solid var(--line-soft);margin:0 0 16px}.fillblank-options{display:grid;grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:10px;margin-bottom:16px}.fb-option{min-height:44px;padding:0 16px;border:2px solid var(--line);border-radius:var(--radius-sm);background:var(--panel);color:var(--ink);font:inherit;font-size:.95rem;font-weight:600;cursor:pointer;transition:all .2s ease}.fb-option:hover:not(:disabled){border-color:var(--green);background:var(--green-light)}.fb-option:disabled{cursor:not-allowed;opacity:.6}.ordering-instruction{font-size:.88rem;color:var(--muted);margin-bottom:12px}.ordering-list{display:grid;gap:8px;margin-bottom:16px}.ord-item{display:flex;align-items:center;gap:12px;padding:12px 16px;border:2px solid var(--line);border-radius:var(--radius-sm);background:var(--panel);cursor:pointer;transition:all .2s ease}.ord-item:hover{border-color:var(--blue);background:var(--blue-light)}.ord-item.selected{border-color:var(--green);background:var(--green-light)}.ord-num{display:grid;place-items:center;width:28px;height:28px;border-radius:50%;background:var(--green);color:#fff;font-size:.82rem;font-weight:700;flex-shrink:0}.ord-item:not(.selected) .ord-num{background:var(--line);color:var(--muted)}.ord-text{font-size:.88rem;color:var(--ink);line-height:1.6}.tf-text{font-size:1.05rem;line-height:1.8;color:var(--ink);padding:20px;border-radius:var(--radius-md);background:var(--panel-cream);border:1px solid var(--line-soft);margin:0 0 16px}.truefalse-options{display:flex;gap:12px;margin-bottom:16px}.tf-btn{flex:1;min-height:48px;border:2px solid var(--line);border-radius:var(--radius-sm);background:var(--panel);color:var(--ink);font:inherit;font-size:1rem;font-weight:700;cursor:pointer;transition:all .2s ease}.tf-btn:hover:not(:disabled){border-color:var(--blue);background:var(--blue-light)}.tf-btn:disabled{cursor:not-allowed}.tf-btn.correct{border-color:var(--green);background:var(--green-light);color:var(--green-dark)}.tf-btn.wrong{border-color:var(--coral);background:var(--coral-light);color:var(--coral-dark)}.fillblank-feedback,.ordering-feedback,.truefalse-feedback{min-height:24px;margin-bottom:10px}.bg-title{font-size:.92rem;font-weight:700;color:var(--ink);margin:0 0 6px}.bg-text{font-size:.84rem;color:var(--ink-soft);line-height:1.7;margin:0}.background-loading,.writing-loading{font-size:.82rem;color:var(--muted)}.writing-hint{font-size:.78rem;color:var(--muted);margin:0 0 10px}.writing-prompts{display:grid;gap:10px}.writing-prompt{display:flex;gap:8px;padding:10px 12px;border-radius:var(--radius-sm);background:var(--panel-cream);border-left:3px solid var(--blue)}.writing-prompt-num{display:grid;place-items:center;width:22px;height:22px;border-radius:50%;background:var(--blue);color:#fff;font-size:.72rem;font-weight:700;flex-shrink:0}.writing-prompt p{font-size:.84rem;color:var(--ink-soft);line-height:1.6;margin:0}.writing-copy-btn{display:block;width:100%;margin-top:12px;padding:8px;border:1.5px solid var(--blue);border-radius:var(--radius-sm);background:transparent;color:var(--blue);font:inherit;font-size:.82rem;font-weight:600;cursor:pointer;transition:all .2s ease}.writing-copy-btn:hover{background:var(--blue-light)}.author-bio-card{max-width:880px;margin:0 auto 32px;padding:24px;border-radius:var(--radius-lg);background:var(--panel);border:1px solid var(--line);box-shadow:var(--shadow-sm)}.author-bio-header{display:flex;align-items:center;flex-wrap:wrap;gap:10px;margin-bottom:14px}.author-bio-name{font-family:var(--font-serif);font-size:1.6rem;font-weight:800;color:var(--ink);margin:0}.author-bio-title{padding:3px 12px;border-radius:999px;background:var(--amber-light);color:var(--amber-dark);font-size:.82rem;font-weight:700}.author-bio-meta{display:flex;gap:10px;margin-left:auto}.author-bio-dynasty,.author-bio-years{font-size:.82rem;color:var(--muted);font-weight:600}.author-bio-achievement{font-size:.9rem;color:var(--ink-soft);line-height:1.7;margin:0 0 14px;padding-left:14px;border-left:3px solid var(--green)}.author-bio-works{margin-bottom:14px}.author-bio-label{font-size:.82rem;font-weight:700;color:var(--muted);margin-bottom:6px}.author-bio-works-list{display:flex;gap:8px;flex-wrap:wrap}.author-bio-work{padding:3px 12px;border-radius:999px;background:var(--green-light);color:var(--green-dark);font-size:.82rem;font-weight:600}.author-bio-anecdote{padding:12px 14px;border-radius:var(--radius-sm);background:var(--panel-cream);border:1px solid var(--line-soft)}.author-bio-anecdote .author-bio-label{margin-bottom:4px}.author-bio-anecdote p{font-size:.86rem;color:var(--ink-soft);line-height:1.7;margin:0}.pinyin-toggle{display:inline-flex;align-items:center;gap:6px;min-height:34px;padding:0 14px;border:1.5px solid var(--line);border-radius:var(--radius-sm);background:var(--panel);color:var(--muted);font:inherit;font-size:.85rem;font-weight:600;cursor:pointer;transition:all .2s ease}.pinyin-toggle:hover{border-color:var(--blue);color:var(--blue);background:var(--blue-light)}.pinyin-toggle.active{border-color:var(--green);color:var(--green);background:var(--green-light)}.pinyin-toggle svg{flex-shrink:0}ruby.pinyin-ruby{ruby-position:over;ruby-align:center}ruby.pinyin-ruby rt{font-size:.45em;font-weight:400;color:var(--muted);line-height:1.2;font-family:var(--font-sans);letter-spacing:0;padding-bottom:1px;user-select:none}:root[data-theme=dark] ruby.pinyin-ruby rt{color:var(--muted-light)}.story-content:has(ruby.pinyin-ruby){line-height:2.6}.story-content:has(ruby.pinyin-ruby) h2,.story-content:has(ruby.pinyin-ruby) h3,.story-content:has(ruby.pinyin-ruby) h4{line-height:2.2}.story-content:has(ruby.pinyin-ruby) p{line-height:2.8}@media print{ruby.pinyin-ruby rt{display:none}.story-content:has(ruby.pinyin-ruby) p{line-height:1.8}}.knowledge-graph-card .kg-container{display:flex;justify-content:center}.kg-svg{width:100%;max-width:280px;height:auto}.kg-svg text{font-family:var(--font-sans);user-select:none}.kg-svg circle{transition:opacity .3s ease,r .3s ease}.kg-center{animation:kg-pulse 3s ease-in-out infinite;transform-origin:center}@keyframes kg-pulse{0%,to{opacity:1}50%{opacity:.85}}.kg-line{opacity:0;animation:kg-line-fade .6s ease forwards}@keyframes kg-line-fade{to{opacity:1}}.kg-node{opacity:0;animation:kg-node-fade .5s ease forwards}@keyframes kg-node-fade{0%{opacity:0;transform:scale(.5)}to{opacity:.15}}.kg-link:hover .kg-node,.kg-node-group:hover .kg-node{opacity:.35!important}.kg-link:hover .kg-glow,.kg-node-group:hover .kg-glow{opacity:.4!important}.kg-link{cursor:pointer}.kg-tooltip{position:absolute;pointer-events:none;opacity:0;transition:opacity .2s ease;z-index:10;background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:8px 12px;font-size:.78rem;max-width:200px;white-space:pre-line;box-shadow:var(--shadow-md);line-height:1.5}.notes-hint{font-size:.78rem;color:var(--muted);margin-bottom:10px;line-height:1.5}.notes-list{display:grid;gap:8px}.notes-empty{font-size:.8rem;color:var(--muted-light);text-align:center;padding:12px 0}.note-item{padding:10px 12px;border-radius:var(--radius-sm);background:var(--panel-cream);border-left:3px solid var(--amber);position:relative}.note-quote{font-size:.8rem;color:var(--muted);font-style:italic;margin:0 0 4px;line-height:1.5}.note-text{font-size:.85rem;color:var(--ink);margin:0;line-height:1.6}.note-delete{position:absolute;top:6px;right:6px;width:20px;height:20px;border:none;border-radius:50%;background:transparent;color:var(--muted-light);font-size:.7rem;cursor:pointer;transition:all .2s ease}.note-delete:hover{background:var(--coral-light);color:var(--coral-dark)}.add-note-fab{position:sticky;bottom:80px;margin-left:auto;display:flex;align-items:center;gap:4px;padding:8px 16px;border:none;border-radius:999px;background:var(--amber);color:#fff;font:inherit;font-size:.85rem;font-weight:700;cursor:pointer;box-shadow:var(--shadow-warm);z-index:20;transition:transform .2s ease}.add-note-fab:hover{transform:scale(1.05)}.note-modal-overlay{position:fixed;inset:0;z-index:9999;display:flex;align-items:center;justify-content:center;background:#00000073;backdrop-filter:blur(2px);padding:20px}.note-modal-overlay[hidden]{display:none}.confirm-modal-overlay{position:fixed;inset:0;z-index:9999;display:flex;align-items:center;justify-content:center;background:#00000073;backdrop-filter:blur(2px);padding:20px}.confirm-modal-overlay[hidden]{display:none}.confirm-modal{width:100%;max-width:380px;background:var(--surface, #fff);border-radius:16px;padding:28px 24px 20px;box-shadow:0 12px 40px #0003;animation:noteModalIn .2s ease;text-align:center}.confirm-modal-message{margin:0 0 20px;font-size:1rem;line-height:1.6;color:var(--ink, #333)}.confirm-modal-actions{display:flex;gap:12px;justify-content:center}.confirm-cancel,.confirm-ok{padding:8px 24px;border-radius:999px;border:none;font-size:.9rem;font-weight:600;cursor:pointer;transition:all .15s ease}.confirm-cancel{background:transparent;color:var(--muted, #888);border:1.5px solid var(--border, rgba(0, 0, 0, .12))}.confirm-cancel:hover{background:var(--panel-cream, #faf6f0)}.confirm-ok{background:#e74c3c;color:#fff}.confirm-ok:hover{filter:brightness(1.1)}:global([data-theme=dark]) .confirm-modal{background:var(--surface, #2a2a2a);box-shadow:0 12px 40px #00000080}:global([data-theme=dark]) .confirm-modal-message{color:var(--text, #eee)}.note-modal{width:100%;max-width:440px;background:var(--surface, #fff);border-radius:16px;padding:24px;box-shadow:0 12px 40px #0003;animation:noteModalIn .2s ease}@keyframes noteModalIn{0%{opacity:0;transform:scale(.95) translateY(10px)}to{opacity:1;transform:scale(1) translateY(0)}}.note-modal-title{margin:0 0 12px;font-size:1.15rem;font-weight:700}.note-modal-quote{margin:0 0 14px;padding:10px 12px;border-radius:8px;background:var(--panel-cream, #faf6f0);border-left:3px solid var(--amber, #d98c3a);font-size:.88rem;color:var(--muted, #666);line-height:1.5;max-height:80px;overflow-y:auto}.note-modal-input{width:100%;box-sizing:border-box;padding:10px 12px;border:1.5px solid var(--border, rgba(0, 0, 0, .12));border-radius:10px;font-size:.95rem;font-family:inherit;resize:vertical;outline:none;transition:border-color .15s ease;background:var(--surface, #fff);color:var(--text, #333)}.note-modal-input:focus{border-color:var(--accent, #d98c3a)}.note-modal-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:16px}.note-modal-cancel,.note-modal-save{padding:8px 20px;border-radius:999px;border:none;font-size:.9rem;font-weight:600;cursor:pointer;transition:all .15s ease}.note-modal-cancel{background:transparent;color:var(--muted, #888);border:1.5px solid var(--border, rgba(0, 0, 0, .12))}.note-modal-cancel:hover{background:var(--panel-cream, #faf6f0)}.note-modal-save{background:var(--accent, #d98c3a);color:#fff}.note-modal-save:hover{filter:brightness(1.08)}:global([data-theme=dark]) .note-modal{background:var(--surface, #2a2a2a);box-shadow:0 12px 40px #00000080}:global([data-theme=dark]) .note-modal-quote{background:#ffffff0f}:global([data-theme=dark]) .note-modal-input{background:var(--surface, #2a2a2a);color:var(--text, #eee);border-color:var(--border, rgba(255, 255, 255, .12))}.readalong-toolbar{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-top:10px;padding:10px 14px;border-radius:var(--radius-sm);background:var(--panel-cream);border:1px solid var(--line-soft)}.readalong-info{display:flex;align-items:center;gap:6px;flex-shrink:0}.readalong-icon{font-size:1.1rem}.readalong-label{font-weight:700;font-size:.85rem;color:var(--ink-soft)}.readalong-controls{display:flex;gap:6px;flex-wrap:wrap}.readalong-btn{display:inline-flex;align-items:center;gap:5px;min-height:32px;padding:0 12px;border:1.5px solid var(--line);border-radius:var(--radius-sm);background:var(--panel);color:var(--muted);font:inherit;font-size:.82rem;font-weight:600;cursor:pointer;transition:all .2s ease}.readalong-btn:hover{border-color:var(--coral);color:var(--coral);background:var(--coral-light)}.readalong-btn.readalong-checkin{border-color:var(--green);color:var(--green)}.readalong-btn.readalong-checkin:hover{background:var(--green-light)}.readalong-status{font-size:.78rem;color:var(--muted);margin-left:auto}.flashcard-page{max-width:700px;margin:0 auto;padding:0 20px 40px}.flashcard-filter{display:flex;align-items:center;flex-wrap:wrap;gap:10px;margin-bottom:24px;padding:14px 18px;background:var(--card-bg, rgba(255, 255, 255, .6));border:1px solid var(--header-border);border-radius:var(--radius-md, 14px);box-shadow:0 2px 8px #2d6a4f0d}.flashcard-filter-label{font-size:.9rem;font-weight:700;color:var(--ink-soft);flex-shrink:0}.flashcard-grade-btns{display:flex;flex-wrap:wrap;gap:8px}.flashcard-grade-btn{padding:7px 16px;border:1.5px solid var(--header-border);border-radius:999px;background:#ffffffb3;color:var(--ink);font:inherit;font-size:.86rem;font-weight:600;cursor:pointer;transition:all .22s cubic-bezier(.34,1.3,.64,1);box-shadow:0 1px 2px #0000000a}.flashcard-grade-btn:hover{border-color:var(--green);color:var(--green-dark);transform:translateY(-2px);box-shadow:0 4px 12px #2d6a4f26}.flashcard-grade-btn.active{background:linear-gradient(135deg,var(--green),var(--green-dark));border-color:var(--green);color:#fff;box-shadow:0 4px 14px #2d6a4f4d}.flashcard-count{margin-left:auto;font-size:.82rem;font-weight:600;color:var(--muted);flex-shrink:0}.flashcard-reset{padding:7px 16px;border:1.5px solid rgba(217,108,106,.4);border-radius:999px;background:#d96c6a14;color:var(--coral-dark, #b0524f);font:inherit;font-size:.82rem;font-weight:600;cursor:pointer;transition:all .22s ease;flex-shrink:0}.flashcard-reset:hover{background:#d96c6a29;border-color:var(--coral);transform:translateY(-2px);box-shadow:0 4px 12px #d96c6a33}.flashcard-progress{text-align:center;font-size:.9rem;font-weight:700;color:var(--ink-soft);margin-bottom:16px}.flashcard-mode-badge{display:inline-block;padding:2px 10px;border-radius:999px;background:var(--coral-light);color:var(--coral-dark);font-size:.78rem;font-weight:700;margin-left:8px}.flashcard-card{perspective:1200px;height:280px;margin-bottom:20px}.flashcard-inner{position:relative;width:100%;height:100%;transition:transform .6s;transform-style:preserve-3d;cursor:pointer}.flashcard-card.flipped .flashcard-inner{transform:rotateY(180deg)}.flashcard-face{position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;padding:30px;border-radius:var(--radius-lg);border:2px solid var(--line);box-shadow:var(--shadow-md)}.flashcard-front{background:linear-gradient(135deg,var(--panel),var(--panel-cream))}.flashcard-back{transform:rotateY(180deg);background:linear-gradient(135deg,var(--green-light),var(--panel))}:root[data-theme=dark] .flashcard-front{background:var(--panel)}:root[data-theme=dark] .flashcard-back{background:var(--panel-cream)}.flashcard-term{font-family:var(--font-serif);font-size:2.5rem;font-weight:800;color:var(--ink)}.flashcard-pinyin{font-size:1.2rem;color:var(--muted);font-weight:600}.flashcard-meaning{font-size:1.1rem;color:var(--ink);text-align:center;line-height:1.7}.flashcard-source{font-size:.8rem;color:var(--muted)}.flashcard-source a{color:var(--green-dark);text-decoration:none}.flashcard-actions{display:flex;gap:12px;justify-content:center;margin-bottom:20px}.flashcard-btn{min-height:44px;padding:0 24px;border:2px solid;border-radius:999px;font:inherit;font-size:.9rem;font-weight:700;cursor:pointer;transition:all .2s ease}.flashcard-btn-wrong{border-color:var(--coral);background:transparent;color:var(--coral-dark)}.flashcard-btn-wrong:hover{background:var(--coral-light)}.flashcard-btn-right{border-color:var(--green);background:transparent;color:var(--green-dark)}.flashcard-btn-right:hover{background:var(--green-light)}.flashcard-btn-flip{border-color:var(--line);background:var(--panel);color:var(--muted)}.flashcard-btn-flip:hover{border-color:var(--blue);color:var(--blue)}.flashcard-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:20px}.flashcard-stat{text-align:center;padding:14px;border-radius:var(--radius-sm);background:var(--panel);border:1px solid var(--line-soft)}.flashcard-stat-num{font-family:var(--font-serif);font-size:1.6rem;font-weight:800;color:var(--ink)}.flashcard-stat-label{font-size:.78rem;color:var(--muted);margin-top:2px}.flashcard-result{text-align:center;padding:40px 20px;border-radius:var(--radius-lg);background:var(--panel);border:1px solid var(--line)}.flashcard-result h3{font-family:var(--font-serif);font-size:1.4rem;color:var(--ink);margin:0 0 16px}.flashcard-result-score{font-size:1rem;color:var(--muted);margin-bottom:20px}.flashcard-result-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}.flashcard-result-actions button{min-height:44px;padding:0 24px;border:2px solid var(--green);border-radius:999px;background:var(--green);color:#fff;font:inherit;font-size:.9rem;font-weight:700;cursor:pointer;transition:all .2s ease}.flashcard-result-actions button:hover{background:var(--green-dark)}.flashcard-result-actions button.secondary{background:transparent;color:var(--green-dark)}.flashcard-result-actions button.secondary:hover{background:var(--green-light)}@media(max-width:640px){.flashcard-card{height:240px}.flashcard-term{font-size:2rem}.flashcard-actions{flex-direction:column}.flashcard-btn{width:100%}}.dash-goal-card{display:grid;grid-template-columns:1fr 1fr 1fr;gap:16px;align-items:center;padding:20px;border-radius:var(--radius-md);background:var(--panel);border:1px solid var(--line);box-shadow:var(--shadow-sm)}.dash-goal-setter{display:flex;align-items:center;gap:10px;justify-content:center}.goal-adjust{width:36px;height:36px;border:2px solid var(--line);border-radius:50%;background:var(--panel);color:var(--ink);font-size:1.3rem;font-weight:700;cursor:pointer;transition:all .2s ease;display:grid;place-items:center}.quiz-best-record{color:var(--amber-dark);font-size:.88rem;font-weight:700;margin:-8px auto 16px;max-width:500px;padding:6px 14px;border-radius:999px;background:var(--amber-light);border:1px dashed var(--amber);width:fit-content}.dict-tool-row{display:flex;gap:10px;flex-wrap:wrap}.dict-hint-btn{display:inline-flex;align-items:center;gap:6px;min-height:44px;padding:0 18px;border:2px solid var(--amber);border-radius:999px;background:var(--amber-light);color:var(--amber-dark);font:inherit;font-weight:700;font-size:.9rem;cursor:pointer;transition:all .2s ease;width:fit-content}.dict-hint-btn:hover:not(:disabled){background:var(--amber);color:#fff}.dict-hint-btn:disabled{opacity:.5;cursor:not-allowed}.dict-hint-text{padding:10px 16px;border-radius:var(--radius-sm);background:var(--amber-light);border:1px dashed var(--amber);color:var(--amber-dark);font-weight:700;font-size:1.05rem;letter-spacing:.05em;width:fit-content;animation:dict-hint-pop .25s ease}@keyframes dict-hint-pop{0%{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}.quiz-result-stars{display:flex;justify-content:center;gap:8px;margin:4px 0 8px}.result-star{font-size:2rem;line-height:1;color:var(--line);transition:all .3s ease}.result-star.lit{color:var(--amber);text-shadow:0 2px 8px rgba(232,168,56,.45);animation:star-pop .4s ease backwards}.result-star.lit:nth-child(2){animation-delay:.12s}.result-star.lit:nth-child(3){animation-delay:.24s}@keyframes star-pop{0%{opacity:0;transform:scale(.4) rotate(-20deg)}to{opacity:1;transform:scale(1) rotate(0)}}.quiz-result-time{color:var(--ink-soft);font-size:.9rem;margin:0 0 12px}.result-hint-mark{margin-left:4px;font-size:.85em}.achievement-toast-container{position:fixed;top:76px;right:16px;z-index:9999;display:flex;flex-direction:column;gap:10px;pointer-events:none}.achievement-toast{display:flex;align-items:center;gap:12px;min-width:240px;max-width:320px;padding:12px 16px;border-radius:var(--radius-sm);background:var(--panel);border:2px solid var(--amber);box-shadow:var(--shadow-md);opacity:0;transform:translate(30px);transition:all .35s cubic-bezier(.22,1,.36,1)}.achievement-toast.show{opacity:1;transform:translate(0)}.achievement-toast.hide{opacity:0;transform:translate(30px)}.achievement-toast-icon{display:grid;place-items:center;width:42px;height:42px;border-radius:50%;background:var(--amber-light);color:var(--amber-dark);flex-shrink:0}.achievement-toast-text{display:grid;gap:2px}.achievement-toast-text strong{font-size:.95rem;color:var(--ink)}.achievement-toast-text small{font-size:.8rem;color:var(--ink-soft)}.dash-calendar-section{margin-bottom:32px}.calendar-nav{display:flex;align-items:center;gap:10px}.calendar-title{font-weight:700;font-size:.95rem;color:var(--ink);min-width:76px;text-align:center}.calendar-nav-btn{display:grid;place-items:center;width:30px;height:30px;border:1.5px solid var(--line);border-radius:50%;background:var(--panel);color:var(--ink);cursor:pointer;transition:all .2s ease}.calendar-nav-btn:hover:not(:disabled){border-color:var(--green);color:var(--green-dark);background:var(--green-light)}.calendar-nav-btn:disabled{opacity:.35;cursor:not-allowed}.checkin-calendar{display:grid;grid-template-columns:repeat(7,1fr);gap:6px;max-width:420px;padding:16px;border-radius:var(--radius-sm);background:var(--panel);border:1px solid var(--line-soft)}.cal-weekday{text-align:center;font-size:.78rem;font-weight:700;color:var(--ink-soft);padding:4px 0}.cal-day{position:relative;display:grid;place-items:center;aspect-ratio:1;font-size:.85rem;color:var(--ink);border-radius:50%;transition:all .15s ease}.cal-day.empty{background:transparent}.cal-day.future{color:var(--ink-soft);opacity:.45}.cal-day.active{background:var(--green);color:#fff;font-weight:700;box-shadow:0 2px 6px #2d6a4f59}.cal-day.today{outline:2px solid var(--amber);outline-offset:2px;font-weight:700}.cal-day.active.today{outline-color:var(--amber)}.calendar-legend{display:flex;align-items:center;gap:8px;margin-top:10px;font-size:.82rem;color:var(--ink-soft)}.legend-dot{width:12px;height:12px;border-radius:50%;display:inline-block;flex-shrink:0}.legend-dot.active{background:var(--green)}.dash-section-sub{font-size:.85rem;color:var(--ink-soft);font-weight:400}:root[data-theme=dark] .cal-day.active{box-shadow:0 2px 6px #00000080}:root[data-theme=dark] .achievement-toast{box-shadow:0 8px 24px #0000008c}@media(max-width:640px){.checkin-calendar{max-width:100%;gap:4px;padding:12px}.achievement-toast-container{left:16px;right:16px}.achievement-toast{max-width:none;width:100%}}.goal-adjust:hover{border-color:var(--green);color:var(--green);background:var(--green-light)}.goal-num{font-family:var(--font-serif);font-size:1.8rem;font-weight:800;color:var(--green-dark);min-width:30px;text-align:center}.goal-unit{font-size:.85rem;color:var(--muted)}.dash-streak{text-align:center}.streak-icon{font-size:2rem;display:block}.streak-num{font-family:var(--font-serif);font-size:1.6rem;font-weight:800;color:var(--coral-dark)}.streak-label{font-size:.78rem;color:var(--muted);display:block}.dash-today-status{text-align:center;font-size:.88rem;font-weight:600;color:var(--muted);padding:8px 12px;border-radius:var(--radius-sm);background:var(--panel-cream)}.dash-today-status.done{color:var(--green-dark);background:var(--green-light)}.dash-notes-list{display:grid;gap:10px}.dash-note-item{padding:12px 14px;border-radius:var(--radius-sm);background:var(--panel);border:1px solid var(--line-soft);border-left:3px solid var(--amber);position:relative}.dash-note-quote{font-size:.82rem;color:var(--muted);font-style:italic;margin:0 0 6px;line-height:1.5}.dash-note-text{font-size:.9rem;color:var(--ink);margin:0 0 6px;line-height:1.6}.dash-note-meta{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.dash-note-source{font-size:.78rem;font-weight:600}.dash-note-source a{color:var(--green-dark);text-decoration:none}.dash-note-time{font-size:.72rem;color:var(--muted-light)}.dash-note-delete{position:absolute;top:8px;right:8px;width:22px;height:22px;border:none;border-radius:50%;background:transparent;color:var(--muted-light);font-size:.72rem;cursor:pointer;transition:all .2s ease}.dash-note-delete:hover{background:var(--coral-light);color:var(--coral-dark)}@media(max-width:768px){.dash-goal-card{grid-template-columns:1fr;gap:12px}}@media(max-width:768px){.dash-overview{grid-template-columns:repeat(2,1fr)}.dash-goal-card,.compare-info-row,.compare-lessons{grid-template-columns:1fr}.dim-row{grid-template-columns:60px 1fr 30px 1fr;font-size:.8rem}.compare-selector{flex-direction:column;align-items:stretch}.compare-vs{text-align:center;padding:0}}.lesson-card.reveal{transition-delay:0s}.lesson-list .lesson-card.reveal:nth-child(1){transition-delay:.05s}.lesson-list .lesson-card.reveal:nth-child(2){transition-delay:.1s}.lesson-list .lesson-card.reveal:nth-child(3){transition-delay:.15s}.lesson-list .lesson-card.reveal:nth-child(4){transition-delay:.2s}.lesson-list .lesson-card.reveal:nth-child(5){transition-delay:.25s}.lesson-list .lesson-card.reveal:nth-child(6){transition-delay:.3s}.lesson-list .lesson-card.reveal:nth-child(7){transition-delay:.35s}.lesson-list .lesson-card.reveal:nth-child(8){transition-delay:.4s}.lesson-list .lesson-card.reveal:nth-child(n+9){transition-delay:.45s}.lesson-card{transition:transform .3s ease,box-shadow .3s ease,opacity .6s ease}.lesson-card:hover{transform:translateY(-4px) scale(1.01)}.lesson-card:hover .card-image img{transform:scale(1.06)}.lesson-card .card-image img{transition:transform .4s ease}.difficulty-stars{display:inline-block}.lesson-card.revealed .difficulty-stars{animation:starFill .6s ease forwards;animation-delay:.3s;opacity:0}.lesson-card.revealed .difficulty-stars{opacity:1}@keyframes starFill{0%{opacity:0;transform:translate(-10px)}to{opacity:1;transform:translate(0)}}.lightbox-overlay{position:fixed;inset:0;z-index:10000;display:none;align-items:center;justify-content:center;background:#000000d1;backdrop-filter:blur(4px);cursor:zoom-out}.lightbox-overlay.active{display:flex;animation:lightboxIn .25s ease}@keyframes lightboxIn{0%{opacity:0}to{opacity:1}}.lightbox-overlay[hidden]{display:none}.lightbox-img{max-width:90vw;max-height:85vh;border-radius:8px;box-shadow:0 20px 60px #00000080;cursor:default;animation:lightboxImgIn .3s ease}@keyframes lightboxImgIn{0%{transform:scale(.85);opacity:0}to{transform:scale(1);opacity:1}}.lightbox-caption{position:absolute;bottom:24px;left:50%;transform:translate(-50%);color:#ffffffd9;font-size:.9rem;text-align:center;max-width:80vw;line-height:1.5}.lightbox-close{position:absolute;top:16px;right:24px;width:40px;height:40px;border:none;border-radius:50%;background:#ffffff26;color:#fff;font-size:1.4rem;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .2s ease}.lightbox-close:hover{background:#ffffff4d}.story-gallery img{cursor:zoom-in;transition:opacity .2s ease}.story-gallery img:hover{opacity:.85}.hero-decoration{position:absolute;top:50%;right:38%;transform:translateY(-50%);perspective:800px;pointer-events:none;z-index:0;opacity:.55}@media(max-width:768px){.hero-decoration{display:none}}.book-3d{width:120px;height:160px;position:relative;transform-style:preserve-3d;transform:rotateY(-25deg) rotateX(5deg);animation:bookFloat 4s ease-in-out infinite}@keyframes bookFloat{0%,to{transform:rotateY(-25deg) rotateX(5deg) translateY(0)}50%{transform:rotateY(-20deg) rotateX(2deg) translateY(-12px)}}.book-3d-cover{position:absolute;inset:0;background:linear-gradient(135deg,var(--forest) 0%,#1a5a3e 100%);border-radius:4px 8px 8px 4px;box-shadow:0 8px 24px #0003;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:12px;transform:translateZ(10px)}.book-3d-title{font-family:var(--font-serif);font-size:.7rem;font-weight:700;color:var(--gold);text-align:center;line-height:1.3;writing-mode:vertical-rl;letter-spacing:.15em}.book-3d-subtitle{font-size:.5rem;color:#ffffff80;margin-top:6px;writing-mode:vertical-rl;letter-spacing:.1em}.book-3d-spine{position:absolute;left:-10px;top:0;width:10px;height:100%;background:linear-gradient(90deg,#0d3d28,#1a5a3e);border-radius:4px 0 0 4px;transform:rotateY(90deg) translateZ(-5px) translate(-5px)}.book-3d-pages{position:absolute;right:0;top:2px;bottom:2px;width:6px;background:repeating-linear-gradient(to bottom,#f5f0e0 0px 1px,#e0d8c0 1px 2px);border-radius:0 4px 4px 0;transform:translateZ(-2px)}.hero-anim-1,.hero-anim-2,.hero-anim-3,.hero-anim-4,.hero-anim-5,.hero-anim-6,.hero-anim-7{opacity:0;animation:heroFadeUp .6s ease forwards}.hero-anim-1{animation-delay:.1s}.hero-anim-2{animation-delay:.25s}.hero-anim-3{animation-delay:.4s}.hero-anim-4{animation-delay:.55s}.hero-anim-5{animation-delay:.7s}.hero-anim-6{animation-delay:.8s}.hero-anim-7{animation-delay:.9s}@keyframes heroFadeUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.hero-panel .stat strong{animation:numberPop .5s ease forwards;opacity:0;transform:scale(.5)}.hero-anim-5 strong{animation-delay:.9s}.hero-anim-6 strong{animation-delay:1s}.hero-anim-7 strong{animation-delay:1.1s}@keyframes numberPop{0%{opacity:0;transform:scale(.5)}60%{opacity:1;transform:scale(1.15)}to{opacity:1;transform:scale(1)}}.hero-copy,.hero-panel{position:relative;z-index:1}.ai-chat-widget{position:fixed;bottom:80px;right:24px;z-index:9000}.ai-chat-toggle{width:56px;height:56px;border-radius:50%;border:1.5px solid rgba(255,255,255,.22);background:linear-gradient(150deg,var(--ai-deep-1) 0%,var(--ai-deep-3) 100%);color:#e8f0ea;cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:0 6px 20px #10181580,inset 0 1px #ffffff1f;transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;position:relative}.ai-chat-toggle:hover{transform:scale(1.08);border-color:#ffffff73;box-shadow:0 8px 28px #10181599,inset 0 1px #fff3}.ai-chat-toggle:focus-visible{outline:3px solid var(--amber);outline-offset:2px}.ai-chat-badge{position:absolute;top:-2px;right:-2px;background:var(--coral);color:#fff;font-size:.6rem;font-weight:700;padding:2px 6px;border-radius:8px;line-height:1}.ai-chat-panel{position:absolute;bottom:72px;right:0;width:380px;max-width:calc(100vw - 48px);height:520px;max-height:calc(100vh - 200px);background:linear-gradient(170deg,#26332c,#1a2420);border-radius:16px;box-shadow:0 16px 56px #141e1973;display:flex;flex-direction:column;overflow:hidden;opacity:0;visibility:hidden;transform:translateY(20px) scale(.95);transition:opacity .25s ease,transform .25s ease,visibility .25s ease;border:1px solid rgba(255,255,255,.12)}.ai-chat-panel.open{opacity:1;visibility:visible;transform:translateY(0) scale(1)}.ai-chat-header{display:flex;align-items:center;justify-content:space-between;padding:14px 16px;background:linear-gradient(135deg,#1f6a46,#123f2b);color:#fff;border-bottom:1px solid rgba(255,255,255,.08)}.ai-chat-header-info{display:flex;align-items:center;gap:10px}.ai-chat-avatar{width:40px;height:40px;border-radius:50%;overflow:hidden;display:flex;align-items:center;justify-content:center;flex-shrink:0}.ai-chat-avatar svg,.ai-chat-avatar img{width:100%;height:100%;object-fit:cover}.ai-chat-header-info strong{display:block;font-size:.95rem;line-height:1.2}.ai-chat-header-info small{display:block;font-size:.7rem;opacity:.7;line-height:1.2}.ai-chat-close{background:none;border:none;color:#ffffffb3;cursor:pointer;padding:4px;display:flex;align-items:center;justify-content:center;transition:color .2s ease}.ai-chat-close:hover{color:#fff}.ai-chat-pinyin-toggle{margin-left:auto;display:inline-flex;align-items:center;gap:4px;height:28px;padding:0 10px;border-radius:999px;border:1.5px solid rgba(255,255,255,.55);background:#ffffff24;color:#fff;font-size:.75rem;font-weight:700;letter-spacing:.02em;font-family:inherit;cursor:pointer;transition:all .2s ease;flex-shrink:0}.ai-chat-pinyin-toggle:hover{background:#ffffff47;transform:scale(1.06)}.ai-chat-pinyin-toggle.active{background:#fff;color:var(--forest, #2d6a4f);border-color:#fff;box-shadow:0 0 0 3px #ffffff40}.ai-chat-message.ai-message{flex-wrap:wrap}.ai-chat-msg-actions{flex-basis:100%;display:flex;align-items:center;gap:8px;padding-left:36px;margin-top:-4px}.ai-chat-speak-btn{display:inline-flex;align-items:center;gap:5px;padding:3px 10px;border-radius:999px;border:1px solid rgba(255,255,255,.24);background:transparent;color:#b9c4bb;font-size:.72rem;font-weight:600;font-family:inherit;cursor:pointer;transition:all .2s ease}.ai-chat-speak-btn:hover{color:#8fd4b2;border-color:#8fd4b2;background:#ffffff0f}.ai-chat-speak-btn.speaking{color:#fff;background:#357a5b;border-color:#357a5b;animation:speakPulse 1.2s ease-in-out infinite}.ai-chat-speak-btn.disabled{opacity:.4;cursor:not-allowed}@keyframes speakPulse{0%,to{box-shadow:0 0 #357a5b73}50%{box-shadow:0 0 0 5px #357a5b00}}.ai-chat-bubble:has(ruby.pinyin-ruby){line-height:2.4}.ai-chat-messages{flex:1;overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:12px;scroll-behavior:smooth}.ai-chat-message{display:flex;max-width:85%;gap:8px;align-items:flex-start}.ai-chat-msg-avatar{flex-shrink:0;width:28px;height:28px;border-radius:50%;overflow:hidden;margin-top:2px}.ai-chat-msg-avatar svg,.ai-chat-msg-avatar img{width:100%;height:100%;object-fit:cover}.ai-chat-message.user-message{align-self:flex-end}.ai-chat-message.ai-message{align-self:flex-start}.ai-chat-bubble{padding:10px 14px;border-radius:14px;font-size:.9rem;line-height:1.6;white-space:pre-wrap;word-break:break-word}.user-message .ai-chat-bubble{background:#357a5b;color:#fff;border-bottom-right-radius:4px}.ai-message .ai-chat-bubble{background:#ffffff17;color:#ece9e0;border-bottom-left-radius:4px}.ai-chat-bubble ruby.pinyin-ruby rt{color:#b8b2a4}.ai-chat-typing{display:flex;align-items:center;gap:4px;padding:14px 16px}.ai-chat-typing span{width:8px;height:8px;border-radius:50%;background:#7d8f85;animation:typingDot 1.4s infinite ease-in-out}.ai-chat-typing span:nth-child(2){animation-delay:.2s}.ai-chat-typing span:nth-child(3){animation-delay:.4s}@keyframes typingDot{0%,60%,to{opacity:.3;transform:scale(.8)}30%{opacity:1;transform:scale(1.1)}}.ai-chat-suggestions{display:flex;gap:6px;padding:8px 16px;flex-wrap:wrap;border-top:1px solid rgba(255,255,255,.09)}.ai-chat-chip{padding:6px 12px;border-radius:20px;border:1px solid rgba(255,255,255,.22);background:#ffffff0a;color:#9fd8bb;font-size:.78rem;cursor:pointer;transition:background .2s ease,color .2s ease;white-space:nowrap}.ai-chat-chip:hover{background:#ffffff1a;color:#c4ecd6}.ai-chat-input-area{display:flex;gap:8px;padding:12px 16px;border-top:1px solid rgba(255,255,255,.09)}.ai-chat-input{flex:1;padding:10px 14px;border-radius:24px;border:1px solid rgba(255,255,255,.16);background:#ffffff12;color:#ece9e0;font-size:.9rem;outline:none;transition:border-color .2s ease}.ai-chat-input::placeholder{color:#ece9e06b}.ai-chat-input:focus{border-color:#6fbf94}.ai-chat-input:disabled{opacity:.5}.ai-chat-send{width:40px;height:40px;border-radius:50%;border:none;background:var(--forest, #2d6a4f);color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:background .2s ease,transform .2s ease}.ai-chat-send:hover:not(:disabled){background:#1a5a3e;transform:scale(1.05)}.ai-chat-send:disabled{opacity:.5;cursor:not-allowed}@media(max-width:768px){.ai-chat-widget{bottom:calc(64px + env(safe-area-inset-bottom,0px));right:16px}.ai-chat-toggle{width:50px;height:50px}}@media(max-width:640px){.ai-chat-widget{right:12px;bottom:calc(60px + env(safe-area-inset-bottom,0px))}.ai-chat-panel{position:fixed;left:0;right:0;bottom:0;width:100%;max-width:100%;height:70vh;height:72dvh;max-height:none;border-radius:20px 20px 0 0;border:1px solid rgba(255,255,255,.12);border-bottom:none;box-shadow:0 -12px 48px #10181580;transform:translateY(100%);padding-bottom:env(safe-area-inset-bottom,0px)}.ai-chat-panel.open{transform:translateY(0)}.ai-chat-header{padding-top:18px;position:relative}.ai-chat-header:before{content:"";position:absolute;top:7px;left:50%;transform:translate(-50%);width:40px;height:4px;border-radius:2px;background:#ffffff47}.ai-chat-header-info strong{font-size:1rem}.ai-chat-close{padding:10px}.ai-chat-pinyin-toggle{height:32px;padding:0 12px;font-size:.8rem}.ai-chat-suggestions{flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none;-webkit-overflow-scrolling:touch}.ai-chat-suggestions::-webkit-scrollbar{display:none}.ai-chat-chip{flex-shrink:0;min-height:36px;padding:6px 14px}.ai-chat-input{font-size:16px;min-height:44px}.ai-chat-voice,.ai-chat-send{width:44px;height:44px}.ai-chat-input-area{padding:10px 12px}}@media(max-width:340px){.ai-chat-header-info small{display:none}.ai-chat-chip{font-size:.78rem;padding:6px 10px}}.ai-chat-voice{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border:none;background:transparent;color:#93a89b;cursor:pointer;border-radius:50%;transition:all .2s ease;flex-shrink:0}.ai-chat-voice:hover{background:#ffffff14;color:#8fd4b2}.ai-chat-voice.listening{color:#d4576b;background:#d4576b1a;animation:voicePulse 1.2s ease-in-out infinite}@keyframes voicePulse{0%,to{transform:scale(1);box-shadow:0 0 #d4576b66}50%{transform:scale(1.1);box-shadow:0 0 0 8px #d4576b00}}:root[data-theme=dark] .ai-chat-voice:hover{background:#ffffff14}.weekly-report-section{margin-bottom:32px}.weekly-report-section .section-header{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:16px}.weekly-report-section .section-header h3{margin:0}.weekly-report-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-bottom:20px}.weekly-stat-card{background:var(--panel, #fff);border:1px solid var(--line, #eee);border-radius:12px;padding:16px;text-align:center}.weekly-stat-icon{font-size:1.5rem;margin-bottom:8px}.weekly-stat-num{font-size:1.6rem;font-weight:700;color:var(--green, #2d6a4f)}.weekly-stat-label{font-size:.8rem;color:var(--muted, #888);margin-top:4px}.weekly-chart{display:flex;align-items:flex-end;gap:8px;height:120px;padding:12px 0;border-bottom:1px solid var(--line, #eee);margin-bottom:12px}.weekly-bar{flex:1;display:flex;flex-direction:column;align-items:center;gap:4px;justify-content:flex-end;height:100%}.weekly-bar-fill{width:100%;max-width:40px;background:linear-gradient(to top,var(--green, #4caf7d),#6bc09a);border-radius:4px 4px 0 0;min-height:4px;transition:height .5s ease}.weekly-bar-label{font-size:.7rem;color:var(--muted, #888)}.weekly-bar-value{font-size:.75rem;color:var(--ink, #333);font-weight:600;min-height:1em}.weekly-summary{padding:12px 16px;background:var(--green-light, #e8f5e9);border-radius:8px;font-size:14px;color:var(--green-dark, #1b5e20);line-height:1.6}.report-period{font-size:.8rem;color:var(--muted, #888)}@media(max-width:600px){.weekly-report-grid{grid-template-columns:repeat(2,1fr)}.weekly-chart{height:80px}}.stroke-order-btn{position:absolute;right:12px;bottom:10px;display:inline-flex;align-items:center;gap:4px;padding:5px 13px;border-radius:999px;border:1px solid rgba(45,106,79,.4);background:#2d6a4f1f;color:var(--green-dark);font-size:.78rem;font-weight:700;font-family:inherit;cursor:pointer;box-shadow:0 1px 4px #2d6a4f2e;transition:background .2s ease,color .2s ease,border-color .2s ease,transform .2s ease}.glossary-card{position:relative;padding-bottom:42px}.stroke-order-btn:hover{background:var(--green-dark);border-color:var(--green-dark);color:#fff;transform:scale(1.06)}:root[data-theme=dark] .stroke-order-btn{border-color:#8cc8aa80;background:#8cc8aa24;color:#a5dcbf}:root[data-theme=dark] .stroke-order-btn:hover{background:#8cc8aa;border-color:#8cc8aa;color:#1c2420}.stroke-modal-overlay{position:fixed;inset:0;z-index:9999;display:flex;align-items:center;justify-content:center;background:#00000073;backdrop-filter:blur(2px);padding:20px}.stroke-modal-overlay[hidden]{display:none}body.stroke-modal-open{overflow:hidden}.stroke-modal{width:100%;max-width:480px;background:var(--surface, #fff);border-radius:16px;padding:24px;box-shadow:0 12px 40px #0003;animation:strokeModalIn .2s ease}@keyframes strokeModalIn{0%{opacity:0;transform:scale(.95) translateY(10px)}to{opacity:1;transform:scale(1) translateY(0)}}.stroke-modal-header{display:flex;align-items:center;justify-content:space-between;gap:12px}.stroke-modal-title{margin:0;font-size:1.15rem;font-weight:700;font-family:var(--font-serif);color:var(--green-dark)}.stroke-modal-close{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:50%;border:none;background:transparent;color:var(--muted, #666);cursor:pointer;transition:background .2s ease,color .2s ease}.stroke-modal-close:hover{background:#0000000f;color:var(--ink, #2b2b2b)}.stroke-modal-tip{margin:8px 0 14px;font-size:.85rem;color:var(--muted, #666);line-height:1.6}.stroke-char-row{display:flex;flex-wrap:wrap;gap:12px;justify-content:center}.stroke-char-box{position:relative;border:1.5px solid rgba(217,140,58,.45);border-radius:10px;background-color:var(--panel-cream, #faf6f0);background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100'%3E%3Cpath d='M0 0L100 100M100 0L0 100M50 0V100M0 50H100' fill='none' stroke='%23d98c3a' stroke-opacity='0.3' stroke-dasharray='5 4' stroke-width='1'/%3E%3C/svg%3E");background-size:100% 100%;cursor:pointer;transition:box-shadow .2s ease,border-color .2s ease,transform .2s ease;overflow:hidden}.stroke-char-box:hover{transform:translateY(-2px);box-shadow:var(--shadow-md, 0 4px 14px rgba(0, 0, 0, .1))}.stroke-char-box.selected{border-color:var(--green-dark);box-shadow:0 0 0 2px #2d6a4f40}.stroke-char-box:focus-visible{outline:2px solid var(--green-dark);outline-offset:2px}.stroke-char-target{width:100%;height:100%}.stroke-char-box.no-data .stroke-char-target{display:flex;align-items:center;justify-content:center;font-family:var(--font-serif);font-size:2.6rem;color:var(--muted, #999)}.stroke-modal-status{min-height:1.4em;margin:14px 0 0;text-align:center;font-size:.88rem;color:var(--ink-soft, #555);line-height:1.6}.stroke-modal-actions{display:flex;justify-content:center;gap:10px;margin-top:14px}.stroke-action-btn{display:inline-flex;align-items:center;gap:6px;padding:8px 20px;border-radius:999px;border:1px solid rgba(45,106,79,.3);background:transparent;color:var(--green-dark);font-size:.9rem;font-weight:600;font-family:inherit;cursor:pointer;transition:background .2s ease,color .2s ease,border-color .2s ease,transform .15s ease}.stroke-action-btn:hover{transform:translateY(-1px);background:#2d6a4f14}.stroke-action-btn.primary,.stroke-action-btn.active{background:var(--green-dark);border-color:var(--green-dark);color:#fff}.stroke-action-btn.primary:hover,.stroke-action-btn.active:hover{background:var(--green, #3a7d5d)}:root[data-theme=dark] .stroke-modal{background:var(--surface, #2a2a2a);box-shadow:0 12px 40px #00000080}:root[data-theme=dark] .stroke-modal-title{color:#8cc8aa}:root[data-theme=dark] .stroke-modal-close:hover{background:#ffffff14;color:#e8e4da}:root[data-theme=dark] .stroke-char-box{background-color:#ffffff0a;border-color:#d98c3a80}:root[data-theme=dark] .stroke-char-box.selected{border-color:#8cc8aa;box-shadow:0 0 0 2px #8cc8aa4d}:root[data-theme=dark] .stroke-action-btn{border-color:#8cc8aa66;color:#8cc8aa}:root[data-theme=dark] .stroke-action-btn:hover{background:#8cc8aa1f}:root[data-theme=dark] .stroke-action-btn.primary,:root[data-theme=dark] .stroke-action-btn.active{background:#8cc8aa;border-color:#8cc8aa;color:#1c2420}@media(max-width:640px){.stroke-modal{width:calc(100% - 24px);max-width:100%;padding:16px;border-radius:14px}.stroke-modal-title{font-size:1.05rem}.stroke-char-row{gap:8px}.stroke-char-box{border-radius:8px}.stroke-modal-actions{flex-direction:column;gap:8px}.stroke-action-btn{width:100%;justify-content:center}.stroke-modal-status{font-size:.8rem;min-height:32px}}body{padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}.reading-progress-bar{top:env(safe-area-inset-top,0px)}.site-footer{padding-bottom:calc(2.5rem + env(safe-area-inset-bottom,0px))}@media(hover:none)and (pointer:coarse){html{-webkit-tap-highlight-color:rgba(45,106,79,.12)}.lesson-card a:active{transform:translateY(1px);filter:brightness(.97)}.quiz-tab:active,.chip:active,.match-option:active,.audio-btn:active,.font-btn:active,.bookmark-btn:active,.share-btn:active,.flashcard-btn:active,.quiz-start-btn:active,.quiz-check-btn:active,.quiz-next-btn:active,.stroke-action-btn:active{transform:scale(.97);filter:brightness(.96)}.glossary-inline-term:active,.glossary-term-clickable:active{background:#e0785626}}@media(max-width:640px){.article-body{font-size:1.0625rem}.article-body p,.article-body li,.sources li{overflow-wrap:break-word}.article-body a,.sources a{overflow-wrap:anywhere}}@media(max-width:380px){img,video,.quiz-result-detail,.glossary-grid,.stroke-char-box{max-width:100%}table{display:block;max-width:100%;overflow-x:auto}}@media(max-width:620px){.seasonal-grid{grid-template-columns:minmax(0,1fr)}.lesson-shelf,.seasonal-card-wrapper,.lesson-card{min-width:0}}@media(max-width:768px){.story-gallery{grid-template-columns:minmax(0,1fr);gap:14px}.story-gallery img{height:auto;aspect-ratio:4 / 3}.story-gallery figcaption{padding:10px 14px;font-size:.85rem}}