.book-reading{--br-green:#2f4c3b;--br-ink:#26382d;--br-secondary:#526057;--br-line:#d6ded8;--br-light:#f4f7f4;background:#fff;color:var(--br-ink);font-family:inherit;font-size:16px;line-height:1.75;padding:32px 0 48px;min-height:75vh}
.book-reading .br-catalog>h3{padding-top:20px}
.book-reading *{box-sizing:border-box}.book-reading p,.book-reading h1,.book-reading h2,.book-reading h3,.book-reading h4{margin:0;letter-spacing:normal}.book-reading h1,.book-reading h2,.book-reading h3,.book-reading h4{font-family:inherit;font-weight:600;line-height:1.4}.book-reading h1{font-size:30px}.book-reading h2,.book-reading h3,.book-reading h4{font-size:20px}.book-reading p,.book-reading label,.book-reading a,.book-reading button,.book-reading select,.book-reading input,.book-reading summary{font-size:16px}.book-reading p{line-height:1.8}.book-reading button,.book-reading select,.book-reading input{font-family:inherit;color:var(--br-ink)}.book-reading button,.book-reading a,.book-reading summary,.book-reading select,.book-reading input{touch-action:manipulation}.book-reading button{cursor:pointer}.book-reading button:disabled{cursor:default}.book-reading a{color:var(--br-green);text-underline-offset:4px}.book-reading a:hover{text-decoration-thickness:2px}.book-reading :focus-visible{outline:3px solid var(--br-green);outline-offset:4px}.book-reading ::selection{background:#d6e8d8;color:#183420}.book-reading input{caret-color:var(--br-green)}.book-reading input::placeholder{color:var(--br-secondary);opacity:1}.book-reading select{accent-color:var(--br-green)}.book-reading svg{width:20px;height:20px;flex:0 0 20px}.book-reading img{display:block;max-width:100%;height:auto}.book-reading details>summary{cursor:pointer;min-height:48px;display:list-item;list-style-position:inside;padding:10px 0;font-weight:500}.book-reading .br-container{max-width:1060px;margin:0 auto;padding:0 28px}.book-reading .br-secondary{color:var(--br-secondary)}.book-reading .br-primary{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:9px 22px;border:1px solid var(--br-green);border-radius:6px;background:var(--br-green);color:#fff;text-decoration:none;font-weight:500}.book-reading .br-primary:hover{background:#233d2d}.book-reading .br-link-button{display:inline-flex;align-items:center;min-height:44px;background:transparent;border:0;color:var(--br-green);text-decoration:underline;text-underline-offset:4px;padding:6px 0}.book-reading .br-back{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;text-decoration:none;white-space:nowrap}.book-reading .br-back:hover{text-decoration:underline}
.book-reading .br-home-heading{display:flex;align-items:center;justify-content:space-between;gap:32px;margin-bottom:24px}.book-reading .br-home-heading p{margin-top:8px;max-width:65ch}.book-reading .br-home-heading img{width:180px;aspect-ratio:5/3;object-fit:cover;border-radius:6px;flex-shrink:0}.book-reading .br-preface{background:var(--br-light);padding:5px 18px;border-radius:6px;margin-bottom:28px}.book-reading .br-letter{max-width:72ch;padding:12px 0 20px}.book-reading .br-letter p{white-space:pre-line}.book-reading .br-letter p+p{margin-top:16px}.book-reading .br-signature{text-align:right}.book-reading .br-shelf-heading{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:22px}.book-reading .br-level-select{display:inline-flex;align-items:center;gap:12px;white-space:nowrap}.book-reading select{min-height:44px;border:1px solid #9cae9f;border-radius:5px;background:#fff;padding:8px 32px 8px 12px;max-width:100%}.book-reading .br-book-entry{display:flex;align-items:center;gap:24px;padding-bottom:24px}.book-reading .br-book-entry>img{width:110px;max-height:150px;object-fit:contain;flex-shrink:0}.book-reading .br-book-entry h3{font-size:28px}.book-reading .br-book-entry p{margin-top:4px}.book-reading .br-book-entry .br-primary{margin-top:16px}.book-reading .br-catalog{margin-top:8px;border-top:1px solid var(--br-line)}.book-reading .br-catalog-content{padding-top:16px}.book-reading .br-search{display:flex;align-items:center;gap:16px;max-width:600px;margin-bottom:16px}.book-reading .br-search input{border:1px solid #9cae9f;border-radius:5px;background:#fff;padding:9px 12px;min-height:46px;min-width:0;flex:1}.book-reading .br-catalog-list{list-style:none;margin:16px 0 0;padding:0}.book-reading .br-catalog-list li{display:grid;grid-template-columns:82px minmax(0,1fr) 60px;gap:16px;align-items:center;padding:13px 0;border-top:1px solid #e3e8e3}.book-reading .br-catalog-list li>div,.book-reading .br-catalog-list li>a{display:flex;flex-wrap:wrap;gap:0 16px;align-items:center;min-height:44px}.book-reading .br-catalog-list li>a{font-weight:500}.book-reading .br-catalog-list li>div>span:last-child,.book-reading .br-catalog-list li>a>span:last-child{color:var(--br-secondary)}.book-reading .br-episode{color:var(--br-secondary)}.book-reading .br-empty{padding:10px 0 24px}.book-reading .br-empty .br-link-button{margin-top:8px}.book-reading .br-empty-search .br-link-button{margin-left:16px}
.book-reading.br-reader-view .br-container{max-width:920px}.book-reading .br-book-heading{display:flex;align-items:center;gap:16px;margin-bottom:24px}.book-reading .br-book-heading>img{width:56px;max-height:76px;object-fit:contain;flex-shrink:0}.book-reading .br-book-heading h1{font-size:28px}.book-reading .br-book-heading p{margin-top:2px}.book-reading .br-book-heading .br-back{margin-left:auto}.book-reading [data-br-reader]{scroll-margin-top:92px}.book-reading .br-reader-tools{display:flex;align-items:center;flex-wrap:wrap;gap:16px;padding:0 0 22px;border-bottom:1px solid var(--br-line)}.book-reading .br-page-select{display:flex;align-items:center;gap:12px;white-space:nowrap}.book-reading .br-page-select select{min-width:160px}.book-reading .br-mode{display:inline-flex;align-items:center;border:1px solid #9cae9f;border-radius:6px}.book-reading .br-mode button:first-child{border-radius:5px 0 0 5px}.book-reading .br-mode button:last-child{border-radius:0 5px 5px 0}.book-reading .br-mode button{border:0;background:#fff;min-height:44px;padding:8px 18px}.book-reading .br-mode button[aria-pressed=true]{background:var(--br-green);color:#fff}.book-reading .br-mode button:hover{background:#e5eee6;color:var(--br-ink)}.book-reading .br-mode button[aria-pressed=true]:hover{background:#233d2d;color:#fff}.book-reading .br-translation{display:flex;align-items:center;gap:8px;min-height:44px;margin-left:auto;cursor:pointer;white-space:nowrap}.book-reading .br-translation input{width:20px;height:20px;margin:0;accent-color:var(--br-green)}.book-reading .br-reading-page{padding:26px 0 22px;max-width:75ch}.book-reading .br-reading-page h2{margin-bottom:22px}.book-reading .br-phrase+.br-phrase{margin-top:24px}.book-reading .br-en{font-size:28px;line-height:1.6;font-weight:400;overflow-wrap:anywhere}.book-reading .br-zh{margin-top:6px;color:var(--br-secondary)}.book-reading .br-cue{margin-top:28px!important;max-width:72ch}.book-reading .br-cue strong{font-weight:500}.book-reading .br-page-nav{display:grid;grid-template-columns:1fr minmax(100px,1fr) 1fr;align-items:center;gap:16px;border-top:1px solid var(--br-line);padding:16px 0;margin-bottom:12px}.book-reading .br-page-nav button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:9px 16px;background:var(--br-green);color:#fff;border:1px solid var(--br-green);border-radius:6px}.book-reading .br-page-nav button:first-child{background:#fff;color:var(--br-green)}.book-reading .br-page-nav button:disabled{opacity:1;background:#f0f3f0;color:#778279;border-color:#dce3dd}.book-reading .br-page-nav>span{text-align:center;font-weight:500}.book-reading .br-more{border-top:1px solid var(--br-line);margin-top:8px}.book-reading .br-more-content{padding:12px 0 6px;max-width:75ch}.book-reading .br-more-content section+section{margin-top:30px}.book-reading .br-more-content h3{margin-bottom:12px}.book-reading .br-more-content p+p{margin-top:12px}.book-reading .br-more-content ul{margin:0;padding-left:23px}.book-reading .br-more-content li+li{margin-top:12px}.book-reading .br-more-content li>p{margin-top:5px}.book-reading .br-life-item+.br-life-item{margin-top:24px}.book-reading .br-life-item h4{font-weight:500;margin-bottom:8px}.book-reading .br-life-item .br-phrases{margin:14px 0}.book-reading .br-life-item .br-en{font-size:28px}.book-reading .br-life-item .br-phrase+.br-phrase{margin-top:16px}.book-reading .br-pdf-links{display:flex;flex-wrap:wrap;gap:8px 24px}.book-reading .br-pdf-links a{display:inline-flex;align-items:center;min-height:44px}.book-reading .br-unavailable{padding:32px 0}.book-reading .br-unavailable p{margin:16px 0}.book-reading .br-live{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
@media(max-width:700px){.book-reading{padding-top:24px;padding-bottom:32px}.book-reading .br-container{padding:0 20px}.book-reading h1{font-size:28px}.book-reading .br-home-heading{gap:16px;align-items:start;margin-bottom:20px}.book-reading .br-home-heading img{width:96px;height:76px;object-fit:cover;margin-top:3px}.book-reading .br-home-heading p{margin-top:8px}.book-reading .br-preface{padding:4px 14px;margin-bottom:24px}.book-reading .br-letter{padding-top:12px}.book-reading .br-shelf-heading{align-items:center;gap:16px;margin-bottom:22px}.book-reading .br-level-select{gap:8px}.book-reading .br-level-select select{padding-left:10px;padding-right:26px}.book-reading .br-book-entry{gap:20px;padding-bottom:20px}.book-reading .br-book-entry>img{width:88px;max-height:122px}.book-reading .br-book-entry p{max-width:190px}.book-reading .br-book-entry .br-primary{margin-top:12px;padding:9px 20px}.book-reading .br-search{display:block}.book-reading .br-search input{display:block;width:100%;margin-top:8px}.book-reading .br-catalog-list li{grid-template-columns:65px minmax(0,1fr) 48px;gap:10px}.book-reading .br-catalog-list li>div,.book-reading .br-catalog-list li>a{display:block}.book-reading .br-catalog-list li>div>span,.book-reading .br-catalog-list li>a>span{display:block}.book-reading .br-book-heading{gap:12px;margin-bottom:20px}.book-reading .br-book-heading>img{width:46px;max-height:63px}.book-reading .br-book-heading h1{font-size:28px}.book-reading .br-book-heading .br-back{gap:5px}.book-reading .br-book-heading .br-back svg{width:18px;flex-basis:18px}.book-reading .br-reader-tools{gap:12px;padding-bottom:18px}.book-reading .br-page-select{width:100%;gap:12px}.book-reading .br-page-select select{flex:1;min-width:0}.book-reading .br-mode button{padding:8px 20px}.book-reading .br-translation{margin-left:auto}.book-reading .br-reading-page{padding:22px 0}.book-reading .br-reading-page h2{margin-bottom:18px}.book-reading .br-en{font-size:28px;line-height:1.55}.book-reading .br-phrase+.br-phrase{margin-top:22px}.book-reading .br-cue{margin-top:24px!important}.book-reading .br-page-nav{position:fixed;z-index:25;bottom:0;left:0;right:0;margin:0;background:#fff;border-top:1px solid #cad5cb;padding:9px 16px calc(9px + env(safe-area-inset-bottom));gap:8px;grid-template-columns:1fr minmax(78px,1fr) 1fr}.book-reading .br-page-nav button{padding:8px 10px;min-height:46px;gap:5px}.book-reading .br-page-nav>span{font-size:16px}.book-reading.br-reader-view{padding-bottom:calc(100px + env(safe-area-inset-bottom))}.book-reading .br-more{margin-top:8px}.book-reading .br-more-content section+section{margin-top:26px}.book-reading .br-life-item .br-en{font-size:28px}}
@media(max-width:359px){.book-reading .br-container{padding-left:16px;padding-right:16px}.book-reading .br-home-heading img{width:76px;height:72px}.book-reading .br-level-select{gap:6px}.book-reading .br-level-select select{max-width:150px}.book-reading .br-book-heading{flex-wrap:wrap}.book-reading .br-book-heading .br-back{min-height:44px;margin-left:auto}.book-reading .br-mode button{padding-left:14px;padding-right:14px}.book-reading .br-translation{gap:6px}.book-reading .br-en,.book-reading .br-life-item .br-en{font-size:26px}.book-reading .br-page-nav{padding-left:12px;padding-right:12px}.book-reading .br-page-nav button{gap:4px;padding-left:7px;padding-right:7px}}
@media(prefers-reduced-motion:reduce){.book-reading *{scroll-behavior:auto!important;animation:none!important;transition:none!important}}
.book-reading .br-series-link{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:24px 0;border-top:1px solid var(--br-line);border-bottom:1px solid var(--br-line);text-decoration:none}.book-reading .br-series-link>div{min-width:0}.book-reading .br-series-link h2{color:var(--br-green);white-space:normal;overflow-wrap:anywhere}.book-reading .br-series-link p{margin-top:8px;color:var(--br-secondary)}.book-reading .br-series-link:hover h2{text-decoration:underline;text-underline-offset:4px}.book-reading .br-series-building{margin-top:24px;color:var(--br-secondary)}.book-reading .br-series-heading{margin-bottom:24px}.book-reading .br-series-heading .br-back{margin-bottom:12px}.book-reading .br-series-heading h1{white-space:normal;overflow-wrap:anywhere}.book-reading .br-series-heading p{margin-top:8px;max-width:65ch}
.book-reading .br-series-family{width:220px;aspect-ratio:3/2;object-fit:contain;flex:none}.book-reading .br-series-link>div{flex:1}
.book-reading .br-series-link+.br-series-link{border-top:0}
@media(max-width:700px){.book-reading .br-series-link{display:grid;grid-template-columns:minmax(0,1fr) 20px;column-gap:16px;row-gap:12px}.book-reading .br-series-family{grid-column:1/-1;width:240px;max-width:100%;justify-self:start}}

/* Each cover belongs to its book row. Closed books keep an informative, noninteractive image. */
.book-reading .br-catalog-list li{grid-template-columns:96px minmax(0,1fr) auto;gap:24px;padding:20px 0;align-items:center}
.book-reading .br-catalog-list .br-catalog-image{display:block;width:96px;height:122px;object-fit:contain;object-position:center}
.book-reading .br-catalog-list .br-catalog-copy{display:flex;flex-direction:column;align-items:flex-start;justify-content:center;gap:3px;min-width:0}
.book-reading .br-catalog-title{font-size:20px;line-height:1.4;overflow-wrap:anywhere}.book-reading .br-catalog-zh{color:var(--br-secondary)}
.book-reading .br-catalog-list .br-catalog-start{min-width:112px;white-space:nowrap}.book-reading .br-image-label{font-size:13px;color:var(--br-secondary)}
@media(max-width:700px){.book-reading .br-catalog-list li{grid-template-columns:72px minmax(0,1fr);column-gap:16px;row-gap:10px;align-items:start}.book-reading .br-catalog-list .br-catalog-image{grid-row:1 / span 2;width:72px;height:100px}.book-reading .br-catalog-list .br-catalog-copy{gap:3px}.book-reading .br-catalog-list .br-catalog-start,.book-reading .br-catalog-list li>.br-secondary{grid-column:2;justify-self:start}.book-reading .br-catalog-title{font-size:19px}.book-reading .br-catalog-list .br-catalog-start{min-width:0;padding:6px 15px;min-height:44px}.book-reading .br-shelf-heading{align-items:start}.book-reading .br-level-select{white-space:normal;flex-wrap:wrap;justify-content:flex-end}}

@media(max-width:359px){.book-reading .br-shelf-heading{display:block}.book-reading .br-shelf-heading h2{white-space:nowrap}.book-reading .br-level-select{display:flex;flex-wrap:nowrap;justify-content:flex-start;gap:10px;margin-top:12px;white-space:nowrap}.book-reading .br-level-select select{flex:1;min-width:0;max-width:none}}

.br-performance,.br-interaction{margin-top:1.4rem;padding-top:1rem;border-top:1px solid var(--line,#e3e7e7)}
.br-performance h3,.br-interaction h3{font-size:1rem;margin:0 0 .65rem}
.br-performance p{line-height:1.8}

/* Optional page-bound family dialogue shares the existing reading controls. */
.book-reading .br-dialogue{margin-top:32px;padding-top:24px;border-top:1px solid var(--br-line)}.book-reading .br-dialogue>h3{margin-bottom:10px}.book-reading .br-dialogue>.br-secondary{font-size:14px;line-height:1.7}.book-reading .br-dialogue-when{margin:20px 0 14px;font-size:15px;color:var(--br-green)}.book-reading .br-dialogue-line+.br-dialogue-line{margin-top:22px}.book-reading .br-dialogue-speaker{margin-bottom:5px;font-size:16px}.book-reading .br-dialogue-group+.br-dialogue-group{margin-top:24px}.book-reading .br-dialogue .br-en{overflow-wrap:anywhere}

/* Parent reading route shown above the existing series entries. */
.book-reading .br-home-guide{max-width:76ch;margin-bottom:28px}.book-reading .br-home-guide h2{margin-bottom:12px}.book-reading .br-home-guide p+p{margin-top:14px}.book-reading .br-home-guide strong{display:block;margin-bottom:3px;font-weight:600}

/* Preserve authentic cover files; brighten only these three on-screen thumbnails. */
.book-reading img.br-catalog-image[src="/assets/picture-books/fairy-tales/little-red-riding-hood-cover.webp"],.book-reading .br-book-heading>img[src="/assets/picture-books/fairy-tales/little-red-riding-hood-cover.webp"]{filter:brightness(1.75) contrast(0.92)}
.book-reading img.br-catalog-image[src="/assets/picture-books/fairy-tales/jack-beanstalk-cover.webp"],.book-reading .br-book-heading>img[src="/assets/picture-books/fairy-tales/jack-beanstalk-cover.webp"]{filter:brightness(1.32) contrast(0.96)}
.book-reading img.br-catalog-image[src="/assets/picture-books/fairy-tales/cinderella-cover.webp"],.book-reading .br-book-heading>img[src="/assets/picture-books/fairy-tales/cinderella-cover.webp"]{filter:brightness(1.65) contrast(0.94)}

/* Make the existing parent letters easy to notice and open before reading. */
.book-reading .br-preface{background:#fff8e8;border:1px solid #ddc488;border-left:5px solid #b89142;border-radius:8px;padding:0 20px;margin-bottom:28px}
.book-reading .br-preface>summary{display:flex;align-items:center;justify-content:space-between;gap:18px;min-height:78px;padding:17px 0;list-style:none;font-size:20px;font-weight:700;line-height:1.45;color:var(--br-green)}
.book-reading .br-preface>summary::-webkit-details-marker{display:none}
.book-reading .br-preface>summary::marker{content:""}
.book-reading .br-preface>summary::after{content:"点击展开";display:block;flex:0 0 auto;white-space:nowrap;padding:7px 13px;border-radius:5px;background:var(--br-green);color:#fff;font-size:14px;font-weight:600;line-height:1.5}
.book-reading .br-preface[open]>summary{border-bottom:1px solid #e4d5af}
.book-reading .br-preface[open]>summary::after{content:"收起"}
.book-reading .br-preface .br-letter{padding-top:18px;padding-bottom:22px}
@media(max-width:700px){.book-reading .br-preface{padding:0 14px;margin-bottom:24px}.book-reading .br-preface>summary{gap:12px;min-height:78px;font-size:19px;padding:16px 0}.book-reading .br-preface>summary::after{padding:7px 10px;font-size:13px}}