@charset "UTF-8";
:root{color-scheme:light;--paper:#f6f4ee;--panel:#fffefb;--ink:#152b42;--soft:#586a79;--line:#dcdedb;--wash:#edf1f3;--brand:#172f48;--onbrand:#fffefb;--accent:#b84d32;font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;font-size:16px;color:var(--ink);background:var(--paper)}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:22px}body{margin:0}a{color:inherit;text-decoration:none}button,input,textarea{font:inherit}button{cursor:pointer;touch-action:manipulation}button:disabled{opacity:.6;cursor:wait}button:focus-visible,a:focus-visible,textarea:focus-visible{outline:3px solid #c87742;outline-offset:4px}[hidden]{display:none!important}
#reading-world{max-width:1320px;margin:auto;padding:0 42px}.masthead{height:102px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);gap:24px}.wordmark{display:flex;align-items:center;gap:13px}.brand-symbol{font-family:Georgia,serif;font-size:45px;line-height:1;position:relative;padding-right:6px}.brand-symbol>span{font-family:Arial,sans-serif;position:absolute;font-size:20px;top:-6px;right:-6px;color:var(--accent)}.wordmark strong{font-family:Georgia,"Songti SC","SimSun",serif;font-size:23px;letter-spacing:3px;display:block}.wordmark small{display:block;font-size:10px;letter-spacing:2.2px;margin-top:5px}.top-nav{display:flex;gap:30px;font-size:14px}.top-nav a{display:flex;gap:8px;align-items:center}.top-nav a span{color:var(--soft);font-family:Georgia,serif;font-style:italic}.edition{font-size:10px;line-height:1.8;letter-spacing:1.4px;text-align:right}.edition b{font-weight:400;font-size:12px;letter-spacing:.5px}
.introduction{display:flex;justify-content:space-between;align-items:center;padding:39px 0 29px;gap:20px}.overline{font-size:10px;letter-spacing:2px;margin:0 0 13px;color:var(--accent);font-weight:600}.introduction h1{font-size:clamp(29px,3.8vw,47px);line-height:1.35;letter-spacing:-1px;font-weight:500;margin:0;font-family:Georgia,"Songti SC","SimSun",serif}.introduction h1 em{font-style:normal;color:var(--accent)}.intro-sub{font-family:Georgia,serif;font-size:16px;margin:13px 0 0;color:var(--soft)}.intro-sub span{font-family:-apple-system,"PingFang SC",sans-serif;font-size:13px;margin-left:12px}.studio-link{white-space:nowrap;display:flex;gap:22px;align-items:center;border-bottom:1px solid var(--ink);padding:9px 0;font-size:14px}.studio-link span{font-size:24px}
.collection{margin-bottom:35px}.collection-heading{display:flex;justify-content:space-between;font-size:10px;letter-spacing:1.5px;margin-bottom:14px;color:var(--soft)}.collection-heading span:last-child{font-size:12px;letter-spacing:.5px}.book-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}.book{display:block;min-width:0;text-align:left;padding:0;border:1px solid transparent;border-bottom:2px solid var(--line);background:transparent;color:var(--ink);transition:transform .2s,border-color .2s}.book:hover{transform:translateY(-3px)}.book[aria-pressed=true]{border-bottom-color:var(--accent)}.cover{display:block;position:relative;overflow:hidden;aspect-ratio:1.85;background:var(--wash)}.cover img{width:100%;height:100%;display:block;object-fit:cover;transition:transform .3s}.book:hover .cover img{transform:scale(1.035)}.cover-index{position:absolute;bottom:10px;left:10px;font-size:9px;letter-spacing:1.5px;color:#fff;background:#132a42e6;padding:6px 8px}.book-info{display:block;padding:14px 3px 16px}.book-category{font-size:12px;display:flex;align-items:center;justify-content:space-between;gap:6px;color:var(--accent)}.book-category span{font-family:Georgia,serif;font-size:12px;font-style:italic;color:var(--soft)}.book-info strong{display:block;font-weight:500;font-size:17px;margin:8px 0 7px;line-height:1.4}.book-info small{font-size:11px;color:var(--soft);display:block;line-height:1.4}
.workspace{display:grid;grid-template-columns:minmax(0,1.65fr) minmax(310px,1fr);gap:30px;align-items:start;border-top:1px solid var(--line);padding-top:29px}.reading-pane{min-width:0;padding-bottom:28px}.chapter-visual{height:160px;position:relative;overflow:hidden}.chapter-visual>img{width:100%;height:100%;display:block;object-fit:cover;object-position:center 40%}.chapter-visual:after{content:"";position:absolute;inset:45% 0 0;background:linear-gradient(transparent,#0c203dcc)}.chapter-meta{position:absolute;z-index:1;bottom:16px;left:20px;right:20px;color:white;display:flex;justify-content:space-between;font-size:9px;letter-spacing:1.8px}.steps{display:flex;gap:0;margin:22px 0 25px;border-bottom:1px solid var(--line)}.steps button{flex:1;border:0;border-bottom:2px solid transparent;background:transparent;color:var(--soft);font-size:14px;min-height:48px;padding:10px 7px;white-space:nowrap}.steps button[aria-pressed=true]{color:var(--ink);border-bottom-color:var(--ink);font-weight:600}.eyebrow{font-size:11px;letter-spacing:.8px;color:var(--accent);margin-bottom:10px}h2{font-family:Georgia,"Songti SC","SimSun",serif;font-size:clamp(24px,2.3vw,32px);font-weight:500;line-height:1.45;letter-spacing:-.3px;margin:0 0 22px}h3{font-size:16px;line-height:1.5;margin:0 0 9px;font-weight:500}.reading{padding:28px 26px;background:var(--panel);border:1px solid var(--line);position:relative;margin:18px 0}.reading:before{content:"“";display:block;font-family:Georgia,serif;font-size:44px;height:35px;line-height:1;color:#bcb09b}.passage{font-family:Georgia,"Songti SC","SimSun",serif;font-size:23px;line-height:2;white-space:pre-line;margin:0 0 18px}.passage.english{font-size:21px;line-height:1.8}.small{font-size:12px;line-height:1.7;color:var(--soft)}.prompt{margin:22px 0;padding:3px 0 3px 20px;border-left:2px solid var(--accent)}.prompt p{font-size:15px;line-height:1.8;margin:0}.prompt h3{font-size:13px;color:var(--accent)}.actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-top:17px}.reading-pane button:not(.steps button),.chat-panel button{border:1px solid #cfd7db;background:transparent;color:var(--ink);font-size:13px;min-height:44px;padding:10px 16px;border-radius:3px}.reading-pane button.primary,.chat-panel button.primary{border-color:var(--brand);background:var(--brand);color:var(--onbrand)}.reading button{margin-bottom:10px}.feedback{font-size:13px;color:var(--soft);margin-top:12px;line-height:1.7}label{display:block;margin:16px 0 8px;font-size:14px;font-weight:500}textarea{width:100%;min-height:84px;display:block;resize:vertical;border:1px solid #cfd7db;padding:14px;border-radius:3px;background:var(--panel);color:var(--ink);font-size:16px;line-height:1.6;scroll-margin-top:30px}.card-result{background:var(--panel);border:1px solid var(--line);padding:24px;margin:22px 0}.card-result p{white-space:pre-wrap;overflow-wrap:anywhere;font-size:15px;line-height:1.8;margin:6px 0 18px}
.chat-panel{min-width:0;position:sticky;top:24px;padding:26px;background:#eaf0f3;border:1px solid #dce4e9;border-radius:3px}.chat-eyebrow{font-size:9px;letter-spacing:1.3px;display:flex;align-items:center;gap:9px;margin-bottom:21px}.ai-mark{font-size:23px;color:var(--accent)}.chat-heading{display:flex;justify-content:space-between;align-items:flex-start;gap:15px}.chat-heading h3{font-family:Georgia,"Songti SC","SimSun",serif;font-size:25px;font-weight:500;line-height:1.6;margin:0 0 13px}.chat-heading #chat-clear{font-size:11px;min-height:36px;padding:6px 10px;border-color:#ccd6dd}.chat-message{background:#fffefb;padding:16px;margin-top:17px;border-radius:4px;border:1px solid #dce3e7}.chat-message.user{background:#dfe8ed;border:0}.chat-message p{white-space:pre-wrap;overflow-wrap:anywhere;font-size:15px;line-height:1.8;margin:6px 0 0}.chat-message .small{font-size:10px;color:var(--accent);letter-spacing:1px}.chat-shortcuts{gap:7px;margin-top:20px}.chat-shortcuts button{font-size:11px;padding:7px 9px;min-height:36px}.chat-panel label{font-size:12px}.chat-panel textarea{border-color:#cdd8df;background:#f8fafb;min-height:100px}.chat-panel #chat-send{flex:1;font-size:14px}.chat-panel form+.feedback{margin-top:12px}.chat-panel>p.small{font-size:10px;line-height:1.8;margin:16px 0 0}#chat-log>p{border-top:1px solid #d3dfe6;margin-top:20px;padding-top:20px;font-size:14px;line-height:1.85}
footer{border-top:1px solid var(--line);margin-top:40px;padding:26px 0 32px;display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap;font-size:11px;color:var(--soft)}footer span:first-child{font-size:10px;letter-spacing:1.2px;color:var(--ink)}footer b{font-weight:400;margin-left:10px;letter-spacing:1px}footer small{font-size:10px}
@media(min-width:1500px){#reading-world{max-width:1450px;padding:0 60px}.cover{aspect-ratio:1.9}.chapter-visual{height:195px}}
@media(max-width:1000px){#reading-world{padding:0 28px}.workspace{gap:22px;grid-template-columns:minmax(0,1.5fr) minmax(290px,1fr)}.book-grid{gap:12px}.book-category{display:block}.book-category span{margin-left:5px}.book-info strong{font-size:15px}.chat-panel{padding:21px}.intro-sub span{display:block;margin:8px 0 0}}
@media(max-width:760px){#reading-world{padding:0 22px}.masthead{height:84px}.top-nav{display:none}.edition{font-size:9px}.introduction{padding:28px 0 25px}.overline{font-size:8px;letter-spacing:1.3px}.introduction h1{font-size:33px}.studio-link{display:none}.intro-sub{font-size:15px}.intro-sub span{font-size:12px;line-height:1.7}.book-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px 14px}.cover{aspect-ratio:1.9}.book-info{padding:10px 1px 12px}.book-category span{font-size:10px}.book-info strong{font-size:16px;margin:7px 0 5px}.book-info small{font-size:10px}.collection{margin-bottom:24px}.workspace{grid-template-columns:1fr;padding-top:22px;gap:10px}.chapter-visual{height:155px}.chat-panel{position:static;padding:25px}.chat-heading h3{font-size:26px}.chat-shortcuts button{font-size:12px;min-height:44px}.chat-panel>p.small{font-size:11px}.chat-heading #chat-clear{min-height:44px}.reading{padding:24px}.passage{font-size:23px}.chat-eyebrow{margin-bottom:15px}.chat-panel textarea{min-height:110px}footer{margin-top:32px;padding-bottom:26px}footer>span:nth-child(2){display:none}}
@media(max-width:400px){#reading-world{padding:0 16px}.masthead{gap:12px}.wordmark strong{font-size:20px}.wordmark small{font-size:8px;letter-spacing:1.8px}.wordmark{gap:9px}.brand-symbol{font-size:39px}.edition{font-size:8px;letter-spacing:.5px}.edition b{font-size:10px}.introduction h1{font-size:29px}.collection-heading{font-size:8px;letter-spacing:.5px}.collection-heading span:last-child{font-size:10px}.book-grid{gap:14px 10px}.book-category{font-size:11px}.book-category span{font-size:9px;margin-left:4px}.book-info strong{font-size:14px}.book-info small{font-size:9px}.cover-index{font-size:7px;padding:5px;bottom:7px;left:7px}.chapter-meta{left:14px;right:14px;font-size:7px;letter-spacing:1px}.steps button{font-size:13px}.reading{padding:20px 17px}.passage{font-size:20px}.passage.english{font-size:19px}.chat-panel{padding:20px}.chat-shortcuts{gap:5px}.chat-shortcuts button{font-size:11px;padding:7px 8px}h2{font-size:25px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.book,.cover img{transition:none}}