:root{font-family:-apple-system,BlinkMacSystemFont,PingFang SC,Microsoft YaHei,sans-serif;color:#263c35;background:#f6f5ef;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;--ink: #173f39;--ink-light: #315b4f;--paper: #fffef9;--cream: #f0ecdf;--line: #e1e2d7;--muted: #6b776d;--orange: #ae5936;--serif: "Songti SC", "STSong", "SimSun", Georgia, serif}*{box-sizing:border-box}body{margin:0;min-width:320px}button,input,textarea,select{font:inherit}button,a,input,textarea,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.47}a{color:var(--ink-light);text-decoration-thickness:1px;text-underline-offset:4px}button,a{touch-action:manipulation}:focus-visible{outline:3px solid #bc7650;outline-offset:4px}button{color:inherit}button svg,a svg{flex-shrink:0}h1,h2,h3,p{margin:0}fieldset{margin:0;padding:0;border:0;min-width:0}main:focus{outline:none}.page-width{width:min(1200px,calc(100% - 80px));margin-inline:auto}.app-shell{min-height:100vh;display:flex;flex-direction:column}main{flex:1}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:fixed;top:-70px;left:20px;z-index:20;padding:12px 20px;background:var(--ink);color:#fff;border-radius:5px}.skip-link:focus{top:10px}.site-header{background:#fffef9f0;border-bottom:1px solid var(--line)}.header-inner{max-width:1360px;margin:auto;min-height:94px;padding:0 40px;display:flex;align-items:center;gap:36px}.brand{background:none;border:0;padding:0;display:flex;gap:12px;text-align:left;align-items:center}.brand-symbol{display:grid;place-items:center;width:43px;height:43px;border-radius:12px 12px 4px;background:var(--ink);color:#f5eedc}.brand strong{color:var(--ink);letter-spacing:3px;font-size:21px;font-weight:650}.brand-dot{color:var(--orange);font-size:27px;letter-spacing:0}.brand small{display:block;color:var(--muted);letter-spacing:2px;font-size:9px;margin-top:4px}nav{display:flex;gap:33px;align-self:stretch;margin-left:auto;margin-right:auto}.nav-item{position:relative;padding:5px 0 0;border:0;background:none;font-size:14px;font-weight:550;color:var(--muted);white-space:nowrap}.nav-item.active{color:var(--ink)}.nav-item.active:after{content:"";position:absolute;bottom:0;left:50%;transform:translate(-50%);height:3px;width:24px;background:var(--orange);border-radius:3px 3px 0 0}.nav-item:not(:disabled):hover{color:var(--orange)}.demo-badge{font-size:11px;color:#55695e;display:flex;align-items:center;gap:7px;border:1px solid #dfe5d9;background:#f3f5ec;border-radius:30px;padding:7px 12px;white-space:nowrap}.demo-badge>span,.status-dot{width:5px;height:5px;background:#6f8d66;border-radius:50%;flex-shrink:0}.notice{display:flex;gap:10px;align-items:center;color:#456350;background:#eaf0e5;border:1px solid #d6e1ce;border-radius:6px;font-size:12px;padding:11px 15px;margin-top:20px}.notice>svg{flex-shrink:0}.notice>span{flex:1}.notice button{border:0;background:transparent;font-size:21px;line-height:1;padding:1px 3px}.shelf-page{padding-top:35px;padding-bottom:45px}.hero{min-height:385px;border:1px solid #e0e2d4;border-radius:12px;background:#e9eddf;position:relative;overflow:hidden;display:flex}.hero:after{content:"";width:560px;height:560px;border:1px solid #dce2d2;border-radius:50%;position:absolute;right:-75px;top:-90px;pointer-events:none}.hero-content{position:relative;z-index:1;flex:1;padding:44px 50px 34px}.eyebrow{color:var(--ink-light);font-size:11px;letter-spacing:2.5px;font-weight:600;display:flex;align-items:center;gap:9px}.eyebrow>span{width:17px;height:1px;background:var(--orange)}.eyebrow.small{font-size:10px;letter-spacing:1.8px;color:#74816e}.hero h1{font:500 clamp(30px,3.1vw,42px)/1.55 var(--serif);letter-spacing:2px;color:var(--ink);margin-top:16px}.hero p{color:#667363;font-size:13px;line-height:1.95;letter-spacing:.4px;margin-top:14px}.button{min-height:41px;border-radius:5px;padding:10px 18px;display:inline-flex;align-items:center;justify-content:center;gap:12px;border:1px solid transparent;font-size:12px;font-weight:550;line-height:1.5;transition:background .16s,border-color .16s,transform .16s}.button:not(:disabled):active{transform:translateY(1px)}.button.primary{background:var(--ink);color:#fffdf4;border-color:var(--ink)}.button.primary:not(:disabled):hover{background:#28584c;border-color:#28584c}.button.secondary{border-color:#cbd3c5;color:var(--ink);background:#fffef8}.button.secondary:not(:disabled):hover{background:#f0f2e8;border-color:#9eaf9d}.button.quiet{background:transparent;color:var(--muted)}.button.quiet:not(:disabled):hover{color:var(--ink);background:#f0f1e8}.button.full{width:100%}.hero .button{margin-top:24px;min-width:182px}.hero-footnote{display:flex;gap:7px;align-items:center;font-size:10px;letter-spacing:.5px;color:#74826d;margin-top:18px}.hero-art{position:relative;width:43%;min-width:330px;flex-shrink:0}.art-orbit{position:absolute;border-radius:50%;border:1px solid #d6ddca}.orbit-one{width:350px;height:350px;right:38px;top:24px}.orbit-two{width:258px;height:258px;right:83px;top:69px}.art-sun{width:85px;height:85px;background:#d7ba8a;border-radius:50%;opacity:.64;top:51px;right:57px;position:absolute}.art-book{position:absolute;height:248px;width:180px;border-radius:3px 9px 9px 3px;box-shadow:11px 18px 20px #304c3e19}.art-book.back{background:#b49b70;transform:rotate(14deg);right:72px;top:99px;border-right:7px solid #e0d8bf}.art-book.back>span{position:absolute;right:24px;bottom:30px;font:42px var(--serif);color:#ede7d6}.art-book.front{top:65px;right:140px;background:#294f40;transform:rotate(-11deg);border-left:10px solid #214537;border-right:5px solid #ddd9be;padding:16px}.art-book-border{border:1px solid #a8b49370;width:100%;height:100%;display:flex;align-items:center;flex-direction:column}.art-book-kicker{color:#c6d0b4;font-size:9px;letter-spacing:3px;margin-top:17px}.art-book-title{color:#f2ecd4;font:29px/1.6 var(--serif);letter-spacing:5px;margin-top:19px}.art-book-seal{color:#eed7bd;background:#ab613c;font:15px var(--serif);padding:3px;margin-top:16px;border:1px solid #d69867}.art-caption{position:absolute;bottom:30px;right:113px;font:11px var(--serif);letter-spacing:4px;color:#7c886e}.art-leaf{position:absolute;width:44px;height:82px;border-radius:90% 0;background:#92a086}.leaf-one{top:235px;right:41px;transform:rotate(32deg)}.leaf-two{width:26px;height:57px;top:283px;right:79px;transform:rotate(75deg);opacity:.6}.resume-card{margin-top:22px;background:#fffef9;border:1px solid var(--line);border-radius:8px;padding:22px 25px;display:flex;align-items:center;gap:17px}.resume-icon{height:44px;width:44px;flex-shrink:0;background:#f1eee3;color:#7f896c;display:grid;place-items:center;border-radius:50%}.resume-card h2{font-size:15px;font-weight:600;margin-top:7px;line-height:1.6}.resume-card h2>span{color:var(--muted);font-weight:400;font-size:12px}.resume-card p{color:var(--muted);font-size:11px;margin-top:5px}.resume-card .button{margin-left:auto;white-space:nowrap;flex-shrink:0}.bookshelf{margin-top:39px}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:21px}.section-heading h2{font:600 24px/1.5 var(--serif);letter-spacing:1px;margin-top:6px;display:flex;gap:11px;align-items:center}.count-badge{font:500 11px/1.5 -apple-system,BlinkMacSystemFont,sans-serif;letter-spacing:0;background:#e8ecdf;color:#64785c;border-radius:20px;min-width:23px;height:23px;display:inline-grid;place-items:center}.section-heading>p{font-size:11px;color:var(--muted)}.separator{display:inline-block;margin:0 10px;color:#aeb5a7}.book-grid{display:grid;grid-template-columns:1fr;gap:22px}.book-card{display:flex;align-items:center;gap:34px;border:1px solid var(--line);border-radius:9px;background:#fffef9;padding:29px}.book-cover{position:relative;align-self:stretch;min-height:267px;width:186px;flex-shrink:0;background:#355746;color:#eee9d3;border-radius:2px 6px 6px 2px;box-shadow:5px 7px 8px #384b3420,inset -4px 0 #eee9d3;display:flex;align-items:center;flex-direction:column;padding:20px 19px 15px 24px}.book-spine{width:8px;position:absolute;left:0;height:100%;top:0;background:#0002;border-right:1px solid #ffffff12}.cover-series{font-size:7px;letter-spacing:2px;color:#c0c9ae}.cover-frame{border:1px solid #b9c29f80;margin-top:14px;flex:1;width:100%;padding:17px 8px;display:flex;flex-direction:column;align-items:center}.cover-title{font:28px/1.3 var(--serif);letter-spacing:5px;writing-mode:vertical-rl;margin-bottom:12px;max-height:180px}.cover-author{font:9px var(--serif);letter-spacing:2px;margin-top:auto}.cover-seal{position:absolute;font:8px/1.5 var(--serif);background:#ae5936;padding:3px 4px;border:1px solid #d8ad84;bottom:41px;right:31px}.cover-bottom{font-size:6px;letter-spacing:1px;color:#bbc6a8;margin-top:14px}.cover-1{background:#7b6647}.cover-2{background:#48596b}.book-detail{flex:1;min-width:0;padding:6px 5px}.pill{display:inline-flex;align-items:center;padding:4px 8px;font-size:9px;border-radius:3px;white-space:nowrap;line-height:1.4;letter-spacing:.5px;font-weight:500}.pill.neutral{background:#eef1e5;color:#526a49;border:1px solid #e1e8d7}.pill.warning{background:#f6eadd;color:#94532e;border:1px solid #ecd6bd}.pill.light{color:#567363;background:#e8eee2;margin-left:auto}.book-detail h3{font:600 27px/1.5 var(--serif);margin-top:9px;letter-spacing:3px}.book-author{font-size:11px;color:var(--muted);margin-top:7px}.book-author>span{margin:0 11px;color:#b9bfb0}.book-description{font-size:12px;color:#6d7769;line-height:2;margin-top:16px;max-width:650px}.book-actions{display:flex;align-items:center;gap:19px;margin-top:19px}.subtle{font-size:10px;color:#78816f}.book-source{margin-top:16px;font-size:10px;color:#74816d}.book-source summary{cursor:pointer;width:fit-content}.book-source dl{margin-bottom:5px;display:grid;grid-template-columns:65px 1fr;gap:6px;overflow-wrap:anywhere}.book-source dd{margin:0}.book-source a{display:inline-flex;align-items:center;gap:6px}.reading-principles{margin-top:33px;padding:25px 0 0;border-top:1px solid var(--line);display:grid;grid-template-columns:repeat(3,1fr)}.reading-principles>div{display:flex;gap:17px;align-items:center;justify-content:center;border-right:1px solid var(--line)}.reading-principles>div:last-child{border:0}.principle-number{font:italic 29px var(--serif);color:#a7b39b}.reading-principles h3{font-size:12px;font-weight:500;letter-spacing:1px}.reading-principles p{font-size:10px;color:#7c8675;margin-top:6px}.site-footer{border-top:1px solid var(--line);padding-block:24px;display:flex;align-items:center;justify-content:space-between;color:#798473;gap:18px}.site-footer>span{display:flex;gap:9px;align-items:center;font-size:11px}.site-footer strong{font-weight:600;color:#53674d;letter-spacing:1px}.footer-motto{font:10px var(--serif);margin-left:9px}.site-footer p{font-size:9px;line-height:1.8}.site-footer .separator{margin-inline:7px}.reader-page{padding-top:24px;padding-bottom:45px}.reader-topline{display:flex;align-items:center;gap:10px;font-size:10px;color:#7a8472}.text-button{display:inline-flex;align-items:center;gap:6px;padding:4px 0;background:none;border:0;font-size:11px;color:var(--ink-light);line-height:1.6}.text-button:not(:disabled):hover{text-decoration:underline;text-underline-offset:4px}.reading-label{display:flex;align-items:center;gap:6px;margin-left:auto;color:#7e8b72}.reader-heading{display:flex;align-items:center;justify-content:space-between;margin-top:26px;margin-bottom:26px;gap:20px}.reader-heading h1{font:600 29px/1.4 var(--serif);letter-spacing:3px;margin-top:7px}.reader-heading p{font-size:10px;color:var(--muted);margin-top:9px}.chapter-select{font-size:10px;color:#7a8472;display:flex;gap:11px;align-items:center;max-width:47%}.chapter-select select{color:#425c4b;padding:10px 30px 10px 12px;border:1px solid #d9dfcf;background:var(--paper);border-radius:5px;font-size:11px;max-width:100%;min-width:0;text-overflow:ellipsis}.reading-layout{display:grid;grid-template-columns:minmax(0,1.58fr) minmax(345px,1fr);align-items:start;gap:25px}.reading-paper{background:var(--paper);border:1px solid var(--line);border-radius:8px;overflow:hidden}.paper-header{padding:32px 32px 0;text-align:center}.paper-label{display:flex;justify-content:center;align-items:center;gap:6px;font-size:10px;letter-spacing:2px;color:#8c967b}.paper-label>span{width:4px;height:4px;border-radius:50%;background:#aa7850}.paper-header h2{font:600 21px/1.8 var(--serif);letter-spacing:2px;color:#354d3d;margin-top:17px}.paper-meta{display:flex;justify-content:center;flex-wrap:wrap;gap:9px;font-size:8px;color:#89907f;margin-top:10px;overflow-wrap:anywhere}.paper-rule{position:relative;display:flex;align-items:center;gap:14px;color:#aab49b;font:12px var(--serif);margin-top:24px;margin-bottom:25px}.paper-rule:before,.paper-rule:after{content:"";height:1px;flex:1;background:#e6e7db}.paragraphs{padding:0 30px 17px 17px}.paragraph{position:relative;display:flex;gap:14px;border-radius:4px;padding:8px 6px 8px 0;transition:background .3s,box-shadow .3s;scroll-margin-top:40px}.paragraph p{font:16px/2.15 var(--serif);letter-spacing:.5px;text-align:justify;color:#3b4939;white-space:pre-wrap;overflow-wrap:anywhere}.paragraph-number{font:8px/3.8 -apple-system,sans-serif;color:#b3b9a5;width:19px;flex-shrink:0;text-align:center}.paragraph.cited{background:#f5edd5;box-shadow:0 0 0 5px #f5edd5}.paragraph:focus{outline:2px solid #bd8a5f;outline-offset:4px}.paper-footer{padding:23px 29px;background:#f8f8f0;border-top:1px solid #e8e9de;display:flex;gap:10px;align-items:flex-start;color:#839175}.paper-footer>svg{margin-top:1px;flex-shrink:0}.paper-footer strong{font-size:10px;font-weight:500;color:#6e7b62}.paper-footer p{font-size:8px;line-height:1.8;margin-top:6px;overflow-wrap:anywhere}.paper-footer a{display:inline-flex;align-items:center;gap:4px;font-size:9px;margin-top:7px}.study-panel{background:#fffef9;border:1px solid #dce2d3;border-radius:8px;overflow:hidden}.study-panel-heading{display:flex;gap:10px;align-items:center;padding:22px 21px 18px}.study-symbol{display:grid;place-items:center;height:36px;width:36px;border:1px solid #dae4d0;border-radius:50%;background:#f0f3e8;color:#708960;flex-shrink:0}.study-panel-heading h2{font-size:15px;font-weight:600;letter-spacing:1px}.study-panel-heading p{font-size:8px;color:#839177;margin-top:5px}.study-panel-heading .pill{font-size:8px;padding:4px 6px}.study-steps{padding:14px 18px;margin:0;background:#f5f6ed;list-style:none;display:flex;align-items:center;justify-content:space-around;border-block:1px solid #e9ecdf}.study-steps li{display:flex;align-items:center;gap:6px;color:#99a28c;font-size:9px}.study-steps li+li:before{content:"";width:16px;height:1px;background:#d9dfcc;margin-right:4px}.study-steps li>span{width:16px;height:16px;border-radius:50%;border:1px solid #d3dbc5;display:grid;place-items:center;font-size:8px}.study-steps li.done,.study-steps li.active{color:#4c6c40}.study-steps li.done>span{background:#657e50;color:#fff;border-color:#657e50}.study-steps li.active>span{background:#e5ebd8;border-color:#9aaa80}.study-start{padding:32px 26px 25px;text-align:center}.start-illustration{display:grid;place-items:center;width:70px;height:70px;margin:0 auto 22px;background:#f3f0e5;border-radius:50%;color:#97a67e}.study-start .eyebrow,.completion .eyebrow{justify-content:center;font-size:8px;letter-spacing:1px}.study-start h3{font:500 24px/1.7 var(--serif);letter-spacing:1px;margin-top:11px}.study-start>p{color:#7b8670;font-size:11px;line-height:2;margin-top:14px;margin-bottom:24px}.study-start .save-note{font-size:8px;letter-spacing:.5px;margin:12px 0 0;color:#9aa28d}.task-content{padding:22px}.task-kicker{display:flex;align-items:center;justify-content:space-between;gap:8px}.task-kicker>span:last-child{font-size:8px;color:#849078}.task-content h3{font-size:14px;line-height:1.9;font-weight:550;margin-top:12px}.citations{display:flex;flex-wrap:wrap;gap:6px;margin-top:12px}.citation{display:inline-flex;align-items:center;gap:5px;font-size:9px;color:#657a53;border:1px solid #e0e7d3;border-radius:3px;background:#f5f7ee;padding:5px 7px}.citation:not(:disabled):hover{color:#8e542f;border-color:#d2b287;background:#f8efdf}.options{display:flex;flex-direction:column;gap:9px;margin-top:22px}.option{display:flex;align-items:flex-start;gap:8px;padding:12px 11px;background:#fdfdf7;border:1px solid #e5e8dc;border-radius:5px;font-size:11px;line-height:1.8;color:#607054;cursor:pointer;transition:background .15s,border-color .15s}.option input{width:13px;height:13px;margin:3px 1px 0 0;accent-color:#456843;flex-shrink:0}.option-letter{font-size:9px;color:#8d987f;flex-shrink:0}.option.selected{background:#edf2e4;border-color:#95ab7c;color:#33542f}.option:hover{border-color:#b4c29f}fieldset:disabled .option{cursor:default}fieldset:disabled .option:not(.selected){opacity:.72}.answer-actions{display:flex;justify-content:space-between;gap:10px;margin-top:17px}.answer-actions .button{min-height:37px;padding:8px 11px;font-size:10px;gap:6px}.hints{background:#f8f2e4;border:1px solid #eee3cd;border-radius:5px;padding:14px;margin-top:18px}.hint-heading{display:flex;align-items:center;gap:6px;color:#9a7847;font-size:10px}.hints p{display:flex;gap:7px;font-size:11px;color:#8a7855;line-height:1.9;margin-top:10px}.hints p>span{color:#b4a380}.feedback{margin-top:18px;padding:16px;border-radius:5px;background:#f0f5e8;border:1px solid #dde7d0}.feedback strong{font-size:12px;color:#4c713c}.feedback>p{font-size:11px;line-height:1.95;margin-top:9px;color:#647958;white-space:pre-wrap}.feedback .button{margin-top:17px;font-size:11px;min-height:38px}.feedback.reconsider{background:#faf4e7;border-color:#eee0c4}.feedback.reconsider strong{color:#94733d}.feedback.reconsider>p{color:#8a7856}.ai-section{padding:21px;border-top:1px solid #e7eadb;background:#fafbf4}.ai-title{display:flex;gap:7px;align-items:center;color:#71885d}.ai-title h3{font-size:12px;font-weight:550;color:#526c40}.ai-title .pill{font-size:7px;padding:3px 5px;margin-left:auto}.ai-intro{margin-top:10px;font-size:9px;color:#8c967d;line-height:1.9}.ai-section textarea{width:100%;resize:vertical;min-height:70px;max-height:230px;padding:11px;margin-top:13px;border:1px solid #dde4d0;border-radius:4px;background:#fffef9;font-size:11px;color:#657755;line-height:1.9}.ai-form-footer{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-top:8px}.ai-form-footer>span{color:#a1aa91;font-size:8px}.ai-button{border:1px solid #d3ddc1;color:#5c7745;background:#edf2e3;min-height:32px;font-size:9px;padding:6px 11px}.ai-button:not(:disabled):hover{background:#e1e9d3}.ai-wait{color:#7f8d70;font-size:10px;line-height:1.9;margin-top:15px}.ai-result{margin-top:18px;padding:14px;background:#fffef9;border:1px solid #e1e8d5;border-radius:5px}.ai-result-label{display:flex;gap:5px;align-items:center;font-size:8px;color:#91a17c}.ai-result>p{white-space:pre-wrap;font-size:11px;line-height:2;margin-top:9px;color:#60734f;overflow-wrap:anywhere}.ai-model{display:flex;gap:8px;font-size:8px;color:#a1ab91;margin-top:14px;overflow-wrap:anywhere}.study-footnote{display:flex;justify-content:center;gap:5px;align-items:center;border-top:1px solid #e9ecdf;padding:13px 10px;background:#f4f6ec;color:#8b967b;font-size:8px}.study-footnote .status-dot{height:4px;width:4px;background:#9aab83}.study-footnote small{font-size:inherit}.completion{padding:32px 27px 22px;text-align:center}.completion-seal{height:64px;width:64px;display:grid;place-items:center;background:#eaf0df;color:#749253;border-radius:50%;margin:0 auto 24px;border:1px solid #d4e1c2}.completion h3{font:600 24px/1.5 var(--serif);margin-top:12px;letter-spacing:2px}.score{display:flex;align-items:baseline;justify-content:center;gap:9px;margin-top:18px;color:#7c8d69}.score strong{font:500 48px var(--serif);color:var(--ink-light)}.score span{font-size:12px}.completion>p{font-size:11px;color:#859177;line-height:2;margin-block:16px 25px}.completion .quiet{margin-top:6px;font-size:10px}.inline-error{background:#fcf0e9;color:#976243;border:1px solid #ecd5c6;border-radius:5px;padding:14px;margin:14px 20px;font-size:11px;line-height:1.8}.inline-error strong{font-size:12px}.inline-error .text-button{color:#975d3b;margin-top:7px}.inline-error .button{font-size:10px;padding:7px 10px;margin-top:10px}.ai-section .inline-error{margin:14px 0 0}.loading-state,.empty-state{padding:70px 25px;display:flex;align-items:center;flex-direction:column;text-align:center;gap:15px;color:var(--muted)}.loading-state h1,.empty-state h1{font:500 26px/1.5 var(--serif);color:var(--ink)}.empty-state h2,.empty-state h3{font:500 22px/1.5 var(--serif);color:var(--ink)}.loading-state p,.empty-state p{font-size:12px;line-height:1.9;max-width:550px}.empty-state .button{margin-top:8px}.empty-state.compact{padding:40px;border:1px dashed #d9dfcb;border-radius:8px}.spinner{display:inline-block;width:24px;height:24px;border:2px solid #adb99c66;border-top-color:#64825c;border-radius:50%;animation:spin .8s linear infinite;flex-shrink:0}.spinner.small{width:13px;height:13px;border-width:1.5px;border-color:currentColor;border-right-color:transparent}@keyframes spin{to{transform:rotate(360deg)}}.teacher-page{padding-block:38px 55px}.teacher-hero{background:#e9eddf;border:1px solid #dde3d1;border-radius:9px;padding:37px 39px;display:flex;justify-content:space-between;align-items:center;gap:30px}.teacher-hero h1{font:500 29px/1.7 var(--serif);letter-spacing:2px;margin-top:15px}.teacher-hero p{color:#77846d;font-size:12px;line-height:1.9;margin-top:13px}.teacher-hero-icon{display:flex;flex-direction:column;align-items:center;gap:11px;color:#8d9f76;padding:0 22px;flex-shrink:0}.teacher-hero-icon span{font:12px var(--serif);letter-spacing:4px}.teacher-policy{display:flex;align-items:flex-start;gap:14px;padding:22px 25px;margin-block:20px 33px;background:#f3f2e8;border:1px solid #e8e5d6;border-radius:6px;color:#a08b5f}.teacher-policy>svg{margin-top:2px;flex-shrink:0}.teacher-policy strong{font-size:12px;font-weight:500;color:#7f795b}.teacher-policy p{font-size:10px;color:#959071;line-height:1.9;margin-top:6px}.resource-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:21px;align-items:start}.resource-card{padding:26px;background:#fffef9;border:1px solid var(--line);border-radius:8px}.resource-heading{display:flex;justify-content:space-between;gap:20px}.resource-badges{display:flex;flex-wrap:wrap;gap:6px}.resource-heading h3{font:600 20px/1.8 var(--serif);margin-top:13px;letter-spacing:1px}.resource-index{color:#b4c0a4;margin-top:10px}.candidate-notice{color:#9a7551;background:#fcf4e8;border:1px solid #efe0c9;padding:9px 10px;font-size:9px;line-height:1.9;border-radius:4px;margin-top:16px}.resource-provenance{margin:20px 0;font-size:10px;line-height:1.9}.resource-provenance>div{display:grid;grid-template-columns:62px 1fr;gap:10px;margin-top:7px}.resource-provenance dt{color:#909a81}.resource-provenance dd{margin:0;color:#68795a;overflow-wrap:anywhere}.resource-body{border-top:1px solid #e6e9dc;border-bottom:1px solid #e6e9dc}.resource-body summary{padding:14px 0;cursor:pointer;font-size:11px;color:#6c7e5a;display:flex;justify-content:space-between;align-items:center;gap:10px;list-style:none}.resource-body summary::-webkit-details-marker{display:none}.resource-body summary>span{display:flex;align-items:center;gap:4px;color:#98a28a;font-size:9px}.resource-body[open] summary>span svg{transform:rotate(90deg)}.resource-text{border-top:1px solid #edf0e4;padding:17px 0;font:13px/2 var(--serif);color:#657457;white-space:pre-wrap;overflow-wrap:anywhere;max-height:650px;overflow-y:auto}.source-link{display:inline-flex;align-items:center;gap:6px;color:#71835e;font-size:9px;margin-top:18px}.resource-local{margin-top:18px}@media(min-width:1450px){.page-width{width:1200px}.hero{min-height:405px}.hero-content{padding-top:49px}.hero-art{margin-right:30px}}@media(max-width:1050px){.page-width{width:calc(100% - 48px)}.header-inner{padding-inline:24px;gap:20px}nav{gap:25px}.hero-content{padding:36px}.hero-art{min-width:300px;width:40%}.art-book.front{right:94px}.art-book.back{right:26px}.art-caption{right:61px}.art-sun{right:16px}.leaf-one{right:5px}.leaf-two{right:43px}.reading-layout{grid-template-columns:minmax(0,1.3fr) minmax(330px,1fr);gap:18px}.study-panel-heading{padding-inline:17px}.study-panel-heading p{font-size:7px}.study-panel-heading .pill{padding:3px 4px;font-size:7px}.task-content,.ai-section{padding:18px}.paper-header{padding-inline:23px}.paragraphs{padding-right:22px;padding-left:10px}.paragraph{gap:7px}.paragraph p{font-size:15px}}@media(max-width:760px){.page-width{width:calc(100% - 32px)}.header-inner{min-height:78px;padding:17px 19px 0;flex-wrap:wrap;gap:14px}.brand{gap:9px}.brand-symbol{height:34px;width:34px;border-radius:9px 9px 3px}.brand-symbol svg{width:21px}.brand strong{font-size:18px;letter-spacing:2px}.brand small{font-size:7px;letter-spacing:1.5px;margin-top:2px}.brand-dot{font-size:20px}.demo-badge{margin-left:auto;font-size:9px;padding:5px 8px}nav{order:3;width:100%;margin:0;gap:32px;height:42px}.nav-item{font-size:12px;padding:0 0 10px}.nav-item.active:after{bottom:-1px}.shelf-page{padding-top:21px}.hero{min-height:350px}.hero-content{padding:28px}.hero h1{font-size:30px}.hero p{font-size:11px}.eyebrow{font-size:9px;letter-spacing:2px}.hero-art{position:absolute;width:260px;height:340px;right:-62px;top:55px;opacity:.18}.hero-content{width:100%}.art-caption{display:none}.hero-footnote{font-size:9px}.hero .button{margin-top:21px}.hero:after{right:-360px}.resume-card{padding:18px;gap:12px;flex-wrap:wrap}.resume-card>div:nth-child(2){flex:1;min-width:160px}.resume-icon{height:36px;width:36px}.resume-card .button{margin-left:48px;min-height:34px;padding:7px 12px;font-size:10px}.resume-card h2{font-size:14px}.resume-card h2>span{display:block;font-size:10px}.resume-card p{font-size:9px;line-height:1.7}.bookshelf{margin-top:29px}.section-heading{gap:12px}.section-heading h2{font-size:22px}.section-heading>p{font-size:9px;text-align:right;line-height:1.8}.section-heading .separator{margin-inline:5px}.eyebrow.small{font-size:8px;letter-spacing:1.5px}.book-card{padding:22px;gap:24px;align-items:flex-start}.book-cover{width:140px;min-height:225px;align-self:flex-start}.cover-series{font-size:5px;letter-spacing:1px}.cover-title{font-size:24px}.cover-bottom{font-size:4px;letter-spacing:.5px}.cover-seal{right:23px;bottom:35px;font-size:6px}.book-detail{padding:0}.book-detail h3{font-size:24px;letter-spacing:2px;margin-top:7px}.book-author{font-size:9px;line-height:1.8}.book-description{font-size:10px;margin-top:11px;line-height:1.9}.book-actions{gap:10px;margin-top:13px;flex-wrap:wrap}.book-actions .button{min-height:35px;padding:7px 11px;font-size:10px;gap:7px}.book-actions .subtle{font-size:8px}.book-source{font-size:9px;margin-top:11px}.reading-principles{margin-top:26px;gap:12px}.reading-principles>div{gap:8px;flex-direction:column;text-align:center}.principle-number{font-size:22px}.reading-principles h3{font-size:10px}.reading-principles p{font-size:8px;line-height:1.7}.site-footer{flex-direction:column;align-items:flex-start;gap:12px;padding-block:21px}.site-footer p{font-size:8px}.reader-topline{font-size:9px}.reading-label{font-size:8px}.reader-heading{align-items:flex-start;flex-wrap:wrap;margin-top:23px;gap:19px}.reader-heading h1{font-size:26px}.reader-heading p{font-size:9px}.chapter-select{width:100%;max-width:100%;font-size:9px}.chapter-select select{flex:1;font-size:10px}.reading-layout{grid-template-columns:minmax(0,1fr);gap:23px}.reading-paper{max-height:68vh;min-height:340px;overflow-y:auto;overscroll-behavior:contain}.paper-header{padding-top:25px}.paper-header h2{font-size:20px}.paragraph p{font-size:16px}.study-panel-heading{padding:22px}.study-panel-heading p{font-size:9px}.study-panel-heading .pill{padding:4px 7px;font-size:8px}.study-steps{padding:15px 20px}.study-steps li{font-size:10px}.task-content,.ai-section{padding:23px}.task-content h3{font-size:15px}.option{font-size:12px;padding:12px}.answer-actions .button{font-size:11px;padding:9px 13px;min-height:39px}.study-footnote{font-size:9px}.ai-section textarea{font-size:12px}.ai-title h3{font-size:13px}.ai-intro{font-size:10px}.ai-button{font-size:10px;min-height:36px}.teacher-page{padding-top:22px}.teacher-hero{padding:28px}.teacher-hero h1{font-size:25px}.teacher-hero p{font-size:11px}.teacher-hero-icon{display:none}.teacher-policy{padding:18px;margin-block:17px 27px}.teacher-policy p{font-size:9px}.resource-list{grid-template-columns:minmax(0,1fr)}.resource-card{padding:23px}.resource-heading h3{font-size:19px}.resource-provenance{font-size:10px}}@media(max-width:440px){.book-card{gap:17px;padding:18px 15px}.book-cover{width:112px;min-height:206px;padding:17px 12px 13px 17px}.cover-frame{padding:13px 6px;margin-top:12px}.cover-title{font-size:23px}.cover-series{font-size:4px;letter-spacing:.7px}.cover-bottom{font-size:4px;letter-spacing:0}.cover-author{font-size:7px}.cover-seal{right:20px;bottom:33px;font-size:5px;padding:2px 3px}.book-detail h3{font-size:22px}.book-description{font-size:10px}.book-author span{margin-inline:5px}.section-heading>p{max-width:135px}.hero-content{padding:26px 23px}.hero h1{font-size:27px;letter-spacing:1px}.task-content,.ai-section{padding:20px}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}.restart-notice{display:flex;align-items:center;gap:15px;padding:20px 23px;margin-top:23px;background:#fbf1e4;border:1px solid #e6d2b9;border-radius:7px;color:#926b43}.restart-notice>svg{flex-shrink:0}.restart-notice>div{flex:1}.restart-notice h2{font-size:14px;font-weight:550}.restart-notice p{font-size:11px;line-height:1.9;margin-top:7px}.restart-notice .button{flex-shrink:0;border-color:#d6b790;color:#825c35;font-size:11px}.restart-notice .restart-error{color:#a0462b}@media(max-width:760px){.restart-notice{align-items:flex-start;flex-wrap:wrap;padding:18px;gap:11px}.restart-notice>div{flex-basis:calc(100% - 40px)}.restart-notice .button{margin-left:32px}}.account-menu{display:flex;align-items:center;gap:14px;max-width:245px}.account-info{display:flex;align-items:flex-end;flex-direction:column;gap:4px;min-width:0}.account-info strong{font-size:11px;font-weight:500;color:var(--ink);max-width:150px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.account-info small{color:var(--muted);font-size:9px}.account-menu .text-button{white-space:nowrap;color:#8c6c49;font-size:10px}.auth-shell{min-height:100vh;display:flex;flex-direction:column}.auth-header{justify-content:space-between}.auth-header-caption{font:12px var(--serif);color:#7f8d72;letter-spacing:2px}.auth-main{flex:1;display:flex;align-items:center;padding-block:50px}.auth-layout{display:grid;grid-template-columns:1.15fr 1fr;align-items:stretch;width:100%;gap:55px}.auth-story{min-height:555px;position:relative;background:#e9eddf;border:1px solid #e0e4d5;border-radius:10px;padding:43px;overflow:hidden}.auth-story:after{content:"";position:absolute;width:340px;height:340px;border-radius:50%;border:1px solid #dbe1ce;right:-85px;bottom:-65px}.auth-story h1{font:500 37px/1.7 var(--serif);letter-spacing:2px;margin-top:24px;color:var(--ink)}.auth-story>p{font-size:12px;line-height:2;color:#6f7e63;margin-top:20px}.auth-book-mark{width:135px;height:165px;margin-top:35px;border:1px solid #9eae8b;border-radius:2px 7px 7px 2px;background:#355746;padding:14px;transform:rotate(-7deg);box-shadow:8px 10px 15px #28472e16}.auth-book-mark>div{border:1px solid #a8b69399;height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px}.auth-book-mark span{font:45px var(--serif);color:#eee8cf}.auth-book-mark small{font:6px var(--serif);letter-spacing:1px;color:#b8c2a6}.auth-book-line{display:none}.auth-story-footnote{position:absolute;bottom:28px;right:29px;font:10px var(--serif);letter-spacing:1.5px;color:#859275}.auth-card{background:#fffef9;border:1px solid var(--line);border-radius:10px;padding:43px;align-self:center;box-shadow:0 9px 28px #344c3510}.auth-card h2{font:600 29px/1.6 var(--serif);letter-spacing:2px;margin-top:12px}.auth-card-intro{color:var(--muted);font-size:12px;line-height:1.9;margin-top:10px}.auth-card form{margin-top:29px}.auth-card label{display:block;font-size:12px;color:#52674a;margin-bottom:10px}.auth-card label:not(:first-child){margin-top:21px}.auth-card input{width:100%;min-width:0;padding:13px;font-size:13px;border:1px solid #d9e0ce;border-radius:5px;color:var(--ink);background:#fdfdf6;min-height:45px}.auth-card input::placeholder{color:#9aa58b}.password-field{display:flex;align-items:stretch;border:1px solid #d9e0ce;border-radius:5px;background:#fdfdf6}.password-field input{border:0;background:transparent}.password-field .text-button{margin-inline:8px 12px;font-size:10px;color:#82916f;white-space:nowrap}.auth-submit{margin-top:26px;min-height:44px;font-size:13px}.auth-help{font-size:10px;color:#87937a;text-align:center;line-height:1.9;margin-top:20px}.auth-card-footer{display:flex;justify-content:center;align-items:center;gap:7px;border-top:1px solid #e7ebdc;padding-top:19px;margin-top:25px;font-size:9px;color:#8a987a}.auth-message,.auth-error{font-size:11px;line-height:1.8;padding:10px 12px;border-radius:4px;margin-top:20px}.auth-message{background:#eef3e7;color:#557442;border:1px solid #dce6d1}.auth-error{background:#fcf0e8;color:#9d5d3e;border:1px solid #edd3c1}.auth-loading{width:100%;min-height:420px;justify-content:center}.auth-logout-error{margin-bottom:0}.auth-logout-error button.text-button{font-size:11px}@media(max-width:1050px){.auth-layout{gap:27px;grid-template-columns:1fr 1fr}.auth-card,.auth-story{padding:31px}.auth-story h1{font-size:31px}}@media(max-width:760px){.account-menu{margin-left:auto;gap:11px;max-width:180px}.account-info strong{max-width:100px;font-size:10px}.account-info small{font-size:8px}.account-menu .text-button{font-size:9px}.auth-header{flex-wrap:nowrap;min-height:80px;padding:19px}.auth-header-caption{font-size:9px;letter-spacing:.5px;max-width:110px;line-height:1.9;text-align:right}.auth-main{padding-block:27px 36px}.auth-layout{grid-template-columns:1fr;gap:21px}.auth-story{min-height:auto;padding:27px}.auth-story h1{font-size:27px;margin-top:14px}.auth-story>p{font-size:11px;margin-top:11px}.auth-book-mark,.auth-story-footnote{display:none}.auth-card{padding:28px}.auth-card h2{font-size:27px}.auth-card form{margin-top:25px}.auth-card input{font-size:16px}}:root{--sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif}.library-page{padding-block:46px 56px}.library-topline{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:30px}.library-topline h1{font:500 31px/1.5 var(--serif);letter-spacing:2px;margin-top:12px}.library-tabs{display:flex;gap:24px}.library-tabs button{border:0;background:none;color:var(--muted);padding:12px 0;font-size:13px;border-bottom:2px solid transparent}.library-tabs button[aria-pressed=true]{color:var(--ink);border-color:var(--orange)}.library-feature{display:grid;grid-template-columns:1.1fr 1fr;background:#e9eddf;border-radius:12px;min-height:430px;overflow:hidden;border:1px solid #dce2d0}.feature-copy{padding:52px 0 35px 52px;position:relative;z-index:1}.feature-copy h2{font:500 clamp(32px,3.1vw,43px)/1.6 var(--serif);letter-spacing:3px;margin-top:21px}.feature-copy>p{font-size:13px;line-height:2;margin-top:16px;color:#63715e}.feature-copy .button{margin-top:25px;padding-inline:24px;gap:35px;min-height:45px}.feature-bottom{display:flex;align-items:center;gap:10px;font-size:10px;color:#7c886e;margin-top:27px;flex-wrap:wrap}.feature-bottom i{width:3px;height:3px;border-radius:50%;background:#9ba78e}.feature-art{position:relative;border:0;background:transparent;display:grid;place-items:center;padding:36px 35px 58px;min-width:0}.feature-art img{height:326px;width:auto;position:relative;z-index:1;border-radius:2px 5px 5px 2px;transform:rotate(-7deg);box-shadow:15px 20px 22px #233d3024,5px 6px #d3cfb7;transition:transform .3s}.feature-art:hover img{transform:rotate(-4deg) translateY(-4px)}.cover-halo{position:absolute;width:370px;height:370px;border:1px solid #d3dbc6;border-radius:50%}.cover-halo:after{content:"";position:absolute;inset:28px;border:1px solid #d8dfcd;border-radius:50%}.feature-sun{position:absolute;height:83px;width:83px;border-radius:50%;right:39px;top:48px;background:#c8aa70;opacity:.65}.feature-caption{position:absolute;bottom:23px;font:12px var(--serif);color:#7a8669;letter-spacing:5px}.library-collection{margin-top:45px}.library-collection h2,.detail-sections h2,.detail-catalog h2{font:500 24px/1.5 var(--serif);letter-spacing:1px}.library-collection h2{margin-top:8px}.library-collection h2 small,.detail-catalog h2 small{color:var(--muted);font:11px var(--sans);letter-spacing:0;margin-left:14px}.library-book{display:grid;grid-template-columns:142px minmax(0,1fr) 225px;gap:32px;padding:28px;border:1px solid var(--line);border-radius:9px;background:var(--paper);align-items:center}.library-cover{padding:0;border:0;background:transparent;border-radius:3px}.library-cover img{display:block;width:100%;border-radius:2px 4px 4px 2px;box-shadow:5px 7px 12px #243d3421}.library-book-copy h3{margin-top:12px}.library-book-copy h3 button{border:0;padding:0;background:none;font:600 27px var(--serif);letter-spacing:2px}.library-book-copy>p:not(.book-author){color:var(--muted);font-size:12px;line-height:1.9;margin-top:12px;max-width:590px}.book-status{display:flex;gap:12px;font-size:10px;line-height:1.8;color:#7d8a73;margin-top:13px}.library-book .book-actions{margin-top:19px;justify-content:flex-start;gap:22px}.library-note{padding:18px 0 18px 30px;border-left:1px solid var(--line);color:#8b907a}.library-note>span:first-child{font-size:10px;letter-spacing:3px;color:#9b7250}.library-note>p{font:16px/1.9 var(--serif);color:#7a836a;margin-top:15px}.library-note>span:last-child{display:block;font-size:9px;margin-top:15px}.library-values{display:grid;grid-template-columns:repeat(3,1fr);gap:30px;padding-top:39px;margin-top:35px;border-top:1px solid var(--line)}.library-values>div{display:grid;grid-template-columns:36px 1fr;column-gap:10px}.library-values>div>span{grid-row:span 2;font:italic 23px var(--serif);color:#b39b76}.library-values h3{font:500 16px var(--serif);letter-spacing:1px}.library-values p{font-size:11px;color:var(--muted);margin-top:8px}.detail-back{margin-bottom:28px}.book-intro{display:grid;grid-template-columns:265px 1fr;gap:75px;padding:42px 65px;background:#eeeee3;border:1px solid var(--line);border-radius:12px;align-items:center}.intro-cover img{display:block;width:100%;box-shadow:12px 18px 25px #273e3625;border-radius:3px 5px 5px 3px}.intro-copy h1{font:500 53px/1.5 var(--serif);letter-spacing:8px;margin-top:20px}.intro-author{font-size:14px;color:var(--muted);margin-top:7px}.intro-description{font-size:13px;color:#65725e;line-height:2;margin-top:24px}.book-facts{display:flex;gap:34px;margin-top:27px}.book-facts>span{font-size:10px;color:var(--muted)}.book-facts strong{display:block;font:500 22px var(--serif);color:var(--ink);margin-bottom:6px}.intro-actions{display:flex;gap:14px;margin-block:28px 15px}.intro-actions .button{min-height:45px;min-width:135px}.detail-sections{display:grid;grid-template-columns:1.2fr 1fr;gap:64px;margin-block:49px}.detail-sections section>p{font-size:12px;line-height:2.1;color:var(--muted);margin-top:18px}.detail-sections section>p.subtle{font-size:10px}.reading-prompts{display:flex;flex-direction:column;gap:10px;font-size:12px;color:#596c50;margin-top:18px}.edition-facts{display:grid;grid-template-columns:70px 1fr;font-size:11px;gap:12px;margin-top:23px}.edition-facts dt{color:#8b927e}.edition-facts dd{margin:0;overflow-wrap:anywhere;line-height:1.8}.detail-sections a{display:inline-block;font-size:11px;margin-top:18px}.detail-chapters{display:grid;grid-template-columns:1fr 1fr;border-top:1px solid var(--line)}.detail-chapters button{display:flex;align-items:center;gap:15px;border:0;border-bottom:1px solid var(--line);padding:19px 15px;text-align:left;background:transparent;font-size:12px;line-height:1.8}.detail-chapters button:hover{background:#eceee3}.detail-chapters button>span:first-child{font:13px var(--serif);color:#a3ab95}.detail-chapters button>span:last-child{margin-left:auto;color:#9ca78d}.reading-mode>.site-header,.reading-mode>.site-footer{display:none}.immersive-reader{--reader-bg: #f5f2e9;--reader-surface: #faf8f1;--reader-ink: #374438;--reader-muted: #8a9180;--reader-line: #e4e3d7;min-height:100vh;background:var(--reader-bg);color:var(--reader-ink)}.immersive-reader.theme-white{--reader-bg: #f8f9f6;--reader-surface: #fff;--reader-line: #e6e9e0}.immersive-reader.theme-dark{--reader-bg: #1d2521;--reader-surface: #252e28;--reader-ink: #d4d8c8;--reader-muted: #929d8c;--reader-line: #3a463a;--ink: #c4d8c5;--ink-light: #b6cbb5;--muted: #a1ae9a;--paper: #252e28;--line: #3a463a}.reading-toolbar{height:65px;display:flex;justify-content:space-between;align-items:center;padding-inline:27px;border-bottom:1px solid var(--reader-line);position:sticky;top:0;z-index:20;background:var(--reader-surface)}.reading-toolbar>div{display:flex;align-items:center;gap:13px;min-width:0}.toolbar-button{min-height:44px;min-width:44px;display:flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:5px;background:transparent;font-size:17px;padding:9px 13px;white-space:nowrap}.toolbar-button>span{font-size:11px}.toolbar-button:hover{background:#7a916f12}.toolbar-button.ai-toggle{border:1px solid var(--reader-line);color:var(--ink);padding-inline:15px}.toolbar-button.ai-toggle.selected{background:var(--ink);color:var(--reader-surface)}.toolbar-divider{width:1px;height:18px;background:var(--reader-line)}.toolbar-book{font:14px var(--serif);letter-spacing:3px;color:var(--reader-muted)}.reader-workspace{display:grid;grid-template-columns:240px minmax(0,1fr);max-width:1650px;margin:auto;align-items:start}.with-assistant .reader-workspace{grid-template-columns:220px minmax(0,1fr) 380px}.without-navigation .reader-workspace{grid-template-columns:minmax(0,1fr)}.without-navigation.with-assistant .reader-workspace{grid-template-columns:minmax(0,1fr) 380px}.reader-navigation{position:sticky;top:65px;height:calc(100dvh - 65px);overflow-y:auto;border-right:1px solid var(--reader-line);padding:27px 13px;scrollbar-width:thin;scrollbar-color:#bdc6b2 transparent}.reader-navigation[hidden],.assistant-dock[hidden]{display:none}.reader-side-title{display:flex;flex-direction:column;padding-inline:12px;gap:8px}.reader-side-title>span{font:21px var(--serif);letter-spacing:4px}.reader-side-title small{font-size:10px;color:var(--reader-muted)}.side-tabs{display:flex;margin-top:26px;border-bottom:1px solid var(--reader-line)}.side-tabs>button{flex:1;min-height:44px;padding:10px 3px;border:0;border-bottom:2px solid transparent;background:transparent;color:var(--reader-muted);font-size:11px;white-space:nowrap}.side-tabs>button[aria-selected=true]{border-bottom-color:var(--orange);color:var(--reader-ink)}.side-search{display:flex;align-items:center;gap:8px;background:#83916c0d;border:1px solid var(--reader-line);border-radius:5px;padding:4px 10px;margin-block:18px 12px}.side-search>span{color:var(--reader-muted);font-size:22px}.side-search input{width:100%;min-width:0;min-height:32px;border:0;outline-offset:3px;background:transparent;color:inherit;font-size:11px}.catalog-list button{display:flex;gap:11px;width:100%;border:0;background:transparent;align-items:baseline;text-align:left;line-height:1.9;font-size:11px;padding:13px 9px;color:var(--reader-muted);border-radius:5px}.catalog-list button>span:first-child{color:#9ca68d;font:11px var(--serif);min-width:17px}.catalog-list button>span:nth-child(2){flex:1}.catalog-list button.current,.catalog-list button:hover{color:var(--ink);background:#7b916b10}.catalog-list button.current i{width:4px;height:4px;border-radius:50%;background:var(--orange);flex-shrink:0;align-self:center}.side-caption,.side-empty{color:var(--reader-muted);font-size:10px;line-height:1.9;padding:10px 5px}.search-results>button{padding:16px 8px;border:0;border-bottom:1px solid var(--reader-line);background:transparent;text-align:left;width:100%}.search-results small,.saved-item small{display:block;color:var(--reader-muted);font-size:9px;line-height:1.8}.search-results p,.saved-item p{color:var(--reader-ink);font:12px/1.9 var(--serif);margin-top:6px}.search-results>button>span{display:block;color:#8e977d;font-size:9px;margin-top:9px}.saved-list section{margin-top:23px}.saved-list h3{font-size:12px;font-weight:500;padding-inline:7px}.saved-list h3 small{color:var(--reader-muted);font-weight:400;margin-left:7px}.saved-item{display:flex;border-bottom:1px solid var(--reader-line);padding-block:11px;align-items:flex-start}.saved-item button{border:0;background:transparent;text-align:left;padding:5px}.saved-item button:first-child{flex:1;min-width:0}.saved-item button:last-child{width:30px;min-height:44px;font-size:20px;color:var(--reader-muted)}.reader-center{min-width:0;width:min(100%,980px);margin:auto;padding:24px 50px 60px}.reader-chapter-line{display:flex;align-items:center;justify-content:space-between;gap:15px;font-size:10px;color:var(--reader-muted);margin-bottom:14px}.reader-chapter-line label{display:flex;align-items:center;gap:8px;min-width:0;max-width:55%}.reader-chapter-line select{color:inherit;background:transparent;border:0;font-size:10px;max-width:180px;min-width:0;padding-block:6px}.reader-paper.reading-paper{border:0;border-radius:0;background:transparent;overflow:visible;min-height:0;max-height:none}.chapter-opening{padding:48px 10px 47px;text-align:center}.chapter-kicker{color:#9a9f89;font:italic 16px var(--serif);letter-spacing:3px}.chapter-opening h1{font:500 clamp(23px,2vw,29px)/1.8 var(--serif);letter-spacing:2px;margin:22px auto 17px;max-width:680px;text-wrap:balance}.chapter-ornament{font:10px var(--serif);letter-spacing:5px;color:#a49c81;display:flex;align-items:center;justify-content:center;gap:17px}.chapter-ornament:before,.chapter-ornament:after{content:"";width:34px;height:1px;background:var(--reader-line)}.reader-paper .paragraphs{max-width:740px;margin:auto;padding:0}.reader-paper .paragraph{display:block;padding:10px 0;margin-bottom:13px;scroll-margin-top:135px}.reader-paper .paragraph p{font-family:var(--reading-font);font-size:var(--reading-size);line-height:var(--reading-line-height);color:var(--reader-ink);letter-spacing:.6px;overflow-wrap:anywhere;text-align:justify}.reader-paper .paragraph-number{position:absolute;left:-30px;top:14px;width:20px;color:#a8ad98;font-size:8px;opacity:.7;line-height:2.8}.reader-paper .paragraph[data-highlight] p{text-decoration:underline;text-decoration-color:#c1a76d90;text-decoration-thickness:5px;text-underline-offset:-2px;text-decoration-skip-ink:none}.reader-paper .paragraph.cited{background:#ccac5c20;box-shadow:0 0 0 8px #ccac5c20}.paragraph-bookmark{position:absolute;right:-31px;top:11px;width:30px;height:44px;background:transparent;border:0;color:var(--reader-muted);opacity:0;font-size:17px}.paragraph:hover .paragraph-bookmark,.paragraph:focus-within .paragraph-bookmark,.paragraph-bookmark.saved{opacity:1}.paragraph-bookmark.saved{color:var(--orange)}.reader-source{max-width:740px;margin:50px auto 0;border-top:1px solid var(--reader-line);padding-top:24px;font-size:10px;color:var(--reader-muted);line-height:1.9}.reader-source>span{font:13px var(--serif);letter-spacing:1px;color:#8a8f76}.reader-source p{margin-top:8px}.reader-source a{display:inline-block;margin-top:10px}.reader-source details{margin-top:10px}.reader-source code{font-size:9px;overflow-wrap:anywhere}.chapter-pagination{display:flex;justify-content:space-between;align-items:center;margin:38px auto 45px;max-width:740px}.chapter-pagination>span{font:11px var(--serif);color:var(--reader-muted)}.reader-study{max-width:740px;margin:auto;border:1px solid var(--reader-line);border-radius:8px;background:var(--reader-surface);overflow:hidden}.reader-study>summary{display:flex;justify-content:space-between;align-items:center;padding:19px 22px;cursor:pointer;font:15px var(--serif);gap:12px}.reader-study>summary small{font:9px var(--sans);color:var(--reader-muted)}.reader-study .study-panel{border:0;border-top:1px solid var(--reader-line);border-radius:0}.reader-study .study-start{padding-block:23px}.reader-study .start-illustration,.reader-study .study-start h3 br{display:none}.return-location{position:sticky;top:76px;z-index:10;display:block;margin:0 auto 15px;padding:11px 20px;border:1px solid var(--reader-line);background:var(--reader-surface);color:var(--ink);border-radius:24px;font-size:11px;box-shadow:0 3px 12px #173f3910}.reading-sync-error{padding:12px 15px;border:1px solid #b49c7755;border-radius:6px;font-size:11px;line-height:1.8;margin-bottom:16px;color:#9c7445}.reading-sync-error button{margin-left:8px}.selection-actions{position:fixed;z-index:45;bottom:28px;left:50%;transform:translate(-50%);display:flex;align-items:center;border-radius:9px;padding:5px 8px;box-shadow:0 7px 30px #173b3433;background:#24483d;color:#fff9e9;max-width:calc(100vw - 24px)}.selection-actions>span{font-size:10px;color:#b7c5ad;padding-inline:8px 12px;white-space:nowrap}.selection-actions button{min-height:44px;border:0;background:none;color:inherit;padding-inline:13px;font-size:12px;white-space:nowrap}.selection-actions button:hover{background:#ffffff12;border-radius:5px}.reader-toast{position:fixed;bottom:100px;left:50%;transform:translate(-50%);padding:12px 22px;border-radius:7px;box-shadow:0 6px 25px #14382d22;background:#24483d;color:#fff8e6;font-size:12px;z-index:60;max-width:calc(100vw - 30px)}.reader-settings,.reader-drawer{border:1px solid var(--line);color:#314c3c;background:#fffef8;box-shadow:0 18px 60px #173f3929}dialog::backdrop{background:#142e264c;-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px)}.reader-settings{width:410px;max-width:calc(100vw - 32px);border-radius:13px;padding:26px;max-height:calc(100dvh - 40px);overflow-y:auto}.dialog-heading{display:flex;justify-content:space-between;align-items:center;gap:15px;margin-bottom:27px}.dialog-heading h2{font:23px var(--serif);margin-top:7px}.dialog-heading>button{width:44px;height:44px;border:0;background:none;font-size:26px;color:#8b957e}.reader-settings fieldset{margin-top:23px}.reader-settings legend{font-size:11px;margin-bottom:11px;color:#768369}.setting-options{display:flex;gap:9px}.setting-options button{flex:1;min-height:44px;border:1px solid #e0e5d5;border-radius:6px;background:transparent;padding:10px 5px;font-size:12px}.setting-options button[aria-pressed=true]{border-color:#6c8c68;box-shadow:inset 0 0 0 1px #6c8c68;color:#254c38;background:#edf2e6}.font-size-label{display:flex;flex-wrap:wrap;font-size:11px;color:#768369;gap:14px;margin-top:24px}.font-size-label output{margin-left:auto;color:#4c6944}.font-size-label input{width:100%;accent-color:#496e48}.setting-options .theme-white{background:#fff}.setting-options .theme-paper{background:#f3eedf}.setting-options .theme-dark{background:#2a352b;color:#d8dfcb}.reader-settings>p{font-size:10px;margin-top:24px;line-height:1.9}.reader-drawer{position:fixed;inset:0 auto 0 0;margin:0;width:min(340px,88vw);max-width:none;height:100dvh;max-height:none;padding:18px;border-radius:0 14px 14px 0}.reader-drawer .dialog-heading{margin-bottom:14px}.reader-drawer .catalog-list button{font-size:13px}.assistant-dock{position:sticky;top:65px;height:calc(100dvh - 65px);min-width:0;border-left:1px solid var(--reader-line)}.assistant-surface{position:static;margin:0;padding:0;width:100%;max-width:none;height:100%;max-height:none;border:0;color:#354b3c;background:#fdfcf7;overflow:hidden}.assistant-surface[open]{display:flex;flex-direction:column}.assistant-header{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:19px 19px 17px;border-bottom:1px solid #e7e9df;flex-shrink:0}.assistant-header>div{display:flex;align-items:center;gap:10px}.assistant-symbol{display:grid;place-items:center;width:35px;height:35px;border-radius:10px;background:#eaf0e2;color:#4f7046;font-size:24px}.assistant-header h2{font-size:15px;letter-spacing:2px;font-weight:550}.assistant-header small{display:block;font-size:9px;color:#95a086;margin-top:5px}.assistant-header>button{width:34px;height:44px;font-size:24px;background:none;border:0;color:#8d9b80}.assistant-context{padding:14px 19px 13px;background:#f4f5ed;flex-shrink:0}.assistant-context>span{display:block;color:#98a087;font-size:8px;letter-spacing:1px}.assistant-context>strong{display:block;font:12px/1.8 var(--serif);margin-top:5px}.assistant-context>p{font-size:8px;line-height:1.8;color:#9aa48b;margin-top:5px}.conversation-tools{display:flex;justify-content:space-between;gap:10px;padding:9px 17px;border-bottom:1px solid #e8ebdf;flex-shrink:0}.conversation-tools label{min-width:0;flex:1}.conversation-tools select{width:100%;border:0;padding:7px 0;background:transparent;font-size:10px;color:#7c8f6c}.conversation-tools>button{border:0;background:transparent;color:#64845a;font-size:10px;padding:7px 0;white-space:nowrap}.assistant-thread{display:flex;flex:1;min-height:0;flex-direction:column}.assistant-viewport{overflow-y:auto;flex:1;min-height:0;padding:18px;scrollbar-width:thin;scrollbar-color:#c9d3bc transparent}.assistant-welcome{padding-top:25px;text-align:center}.assistant-welcome>div:first-child{font-size:37px;color:#91a37e;margin-bottom:14px}.assistant-welcome h3{font:19px var(--serif);color:#546d46}.assistant-welcome>p{max-width:260px;margin:12px auto 25px;font-size:11px;line-height:2;color:#919b83}.assistant-suggestions{display:grid;gap:9px}.assistant-suggestions button{display:flex;align-items:center;justify-content:space-between;gap:15px;text-align:left;background:#f7f8f0;border:1px solid #e5eadb;border-radius:7px;padding:13px 14px;color:#718562;font-size:11px}.assistant-suggestions button>span{color:#aab698}.assistant-composer{border:1px solid #dce4d0;background:#fffef9;margin:9px 15px 0;border-radius:10px;padding:11px 12px 9px;box-shadow:0 3px 14px #2e472e05;flex-shrink:0}.assistant-composer:focus-within{border-color:#98af86;box-shadow:0 0 0 2px #8fa67f10}.assistant-composer textarea{width:100%;resize:none;border:0;outline:none;padding:4px 0;background:transparent;color:#435d36;font:12px/1.9 var(--sans)}.assistant-composer textarea::placeholder{color:#a1ad91}.composer-bottom{display:flex;align-items:center;justify-content:space-between;margin-top:7px;gap:15px}.composer-bottom>div{display:flex;align-items:center;gap:8px}.composer-bottom span{font-size:8px;color:#abb49c}.composer-bottom button{border:0;background:#365e42;color:#fff;border-radius:6px;width:34px;height:33px;font-size:22px}.composer-bottom button.image-add{background:transparent;color:#879c73;font-size:23px}.composer-bottom button.assistant-stop{width:auto;font-size:11px;padding-inline:9px;background:#a67450}.assistant-privacy{color:#a4ad97;text-align:center;font-size:8px;line-height:1.8;padding:10px 14px 13px;flex-shrink:0}.chat-message{margin-bottom:23px;min-width:0}.chat-message-label{display:flex;align-items:center;gap:8px;font-size:9px;color:#799269;margin-bottom:9px}.chat-message-label span{font-size:7px;color:#a7b399;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.chat-bubble{font-size:12px;line-height:1.9;color:#52634a;overflow-wrap:anywhere}.chat-bubble p+p{margin-top:12px}.chat-bubble h1,.chat-bubble h2,.chat-bubble h3{font-size:13px;margin-block:15px 8px}.chat-bubble ul,.chat-bubble ol{padding-left:21px}.chat-bubble pre{overflow-x:auto;padding:12px;border-radius:5px;background:#edf1e5;font-size:10px}.chat-bubble blockquote{border-left:2px solid #b1c59d;margin-left:0;padding-left:13px;color:#7c8f6a}.chat-bubble table{display:block;overflow-x:auto;border-collapse:collapse;font-size:10px}.chat-bubble td,.chat-bubble th{padding:6px;border:1px solid #dce4d1}.from-user .chat-message-label{justify-content:flex-end;color:#a3ad96}.from-user .chat-bubble{background:#edf2e5;border:1px solid #e1e9d6;border-radius:10px 10px 2px;padding:12px 14px;color:#557042}.assistant-citations{display:flex;flex-wrap:wrap;gap:7px;margin-top:13px}.assistant-citations button{padding:6px 9px;font-size:9px;color:#7f906a;border:1px solid #dfe6d5;background:#f6f8ef;border-radius:5px;min-height:32px}.assistant-disclaimer{display:block;color:#adb69e;font-size:8px;margin-top:10px}.assistant-thinking,.chat-working{color:#9caa8d;font-size:10px;line-height:1.8;display:flex;align-items:center;gap:8px}.chat-working{margin-top:8px}.message-incomplete,.expired-image{display:block;font-size:10px;color:#a38e6a;line-height:1.8;padding-top:6px}.assistant-error,.assistant-load-error{font-size:11px;line-height:1.8;color:#a17851;background:#f8f1e6;border:1px solid #e9ddc6;border-radius:7px;padding:11px 13px;margin:8px 15px;flex-shrink:0}.assistant-error button{border:0;background:none;color:#7d6441;font-size:10px;padding:7px 0 0;text-decoration:underline;text-underline-offset:3px}.draft-quote{background:#f0f3e9;border-left:2px solid #9db587;border-radius:4px;padding:8px 10px;margin-bottom:10px}.draft-quote>div{display:flex;justify-content:space-between;align-items:center;color:#869b73;font-size:8px}.draft-quote button{background:none;border:0;font-size:19px;color:#8a9f78}.draft-quote p{font:10px/1.8 var(--serif);color:#7e906d;margin-top:5px}.draft-images{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:9px}.draft-images>div{position:relative}.draft-images img{width:64px;height:64px;object-fit:cover;border-radius:5px;border:1px solid #d6dfcb}.draft-images button{position:absolute;right:-5px;top:-5px;border:1px solid #d5dec9;border-radius:50%;width:23px;height:23px;background:#fffef9;color:#7d936b}.message-image{display:block;max-width:100%;max-height:200px;border-radius:6px;margin-top:9px;object-fit:contain}.stored-draft-images{font-size:9px;color:#8e9b80;margin-bottom:10px}.stored-draft-images .message-image{max-height:75px;max-width:90px}.image-error{font-size:10px;line-height:1.8;color:#ab7653;margin-top:7px}.folded-answer{max-height:470px;overflow:hidden;-webkit-mask-image:linear-gradient(#000 80%,transparent);mask-image:linear-gradient(#000 80%,transparent)}.expand-answer{border:0;background:transparent;color:#718e60;padding:10px 0 3px;font-size:10px}@media(min-width:1650px){.with-assistant .reader-workspace{grid-template-columns:240px minmax(0,1fr) 400px}}@media(max-width:1200px){.reader-center{padding-inline:38px}.library-note{display:none}.library-book{grid-template-columns:142px 1fr}}@media(max-width:1050px){.reader-workspace,.with-assistant .reader-workspace,.without-navigation.with-assistant .reader-workspace{display:block}.reader-navigation{display:none}.reader-center{width:min(100%,860px);padding-inline:55px}.assistant-dock{position:static;height:0;border:0}.assistant-surface{position:fixed;inset:16px 0 0;margin:0;width:100%;height:calc(100dvh - 16px);max-height:none;border-radius:17px 17px 0 0;border:1px solid #dbe4ce}.assistant-header{padding-block:14px}.assistant-context{padding-block:10px}.assistant-context>p{display:none}.assistant-header>button{width:44px}.assistant-privacy{padding-bottom:max(12px,env(safe-area-inset-bottom))}.assistant-composer textarea{font-size:16px}.chat-bubble{font-size:14px}.assistant-suggestions button{min-height:44px;font-size:13px}.assistant-citations button{min-height:44px;font-size:11px}.composer-bottom button{width:44px;height:44px}.conversation-tools select,.conversation-tools>button{min-height:44px;font-size:12px}.image-add{min-width:44px}.draft-quote p{font-size:12px}.book-intro{padding:35px;gap:40px;grid-template-columns:220px 1fr}}@media(max-width:760px){.library-page{padding-block:27px 39px}.library-topline{display:block;margin-bottom:21px}.library-topline h1{font-size:26px;letter-spacing:1px;margin-top:10px}.library-tabs{margin-top:14px;gap:28px}.library-tabs button{min-height:44px;font-size:12px}.library-feature{grid-template-columns:1fr;min-height:0;position:relative}.feature-copy{padding:29px 25px 26px}.feature-copy h2{font-size:28px;letter-spacing:1px;margin-top:16px}.feature-copy>p{font-size:12px;line-height:1.95;margin-top:14px;max-width:220px}.feature-copy .button{padding-inline:18px;gap:18px;min-height:44px;font-size:11px;margin-top:20px}.feature-bottom{font-size:8px;gap:7px;margin-top:23px;max-width:230px}.feature-art{position:absolute;width:125px;right:-23px;bottom:39px;transform:rotate(7deg);opacity:.9;padding:0}.feature-art img{height:166px;box-shadow:8px 10px 16px #22382e22,3px 3px #cbc7b0}.feature-sun,.feature-caption,.cover-halo{display:none}.library-collection{margin-top:30px}.library-collection .section-heading{align-items:flex-end}.library-collection .section-heading>p{display:none}.library-collection h2{font-size:22px}.library-collection h2 small{font-size:9px;margin-left:9px}.library-book{grid-template-columns:89px minmax(0,1fr);align-items:start;gap:17px;padding:19px 17px}.library-book-copy>.eyebrow{font-size:7px;letter-spacing:1px}.library-book-copy h3{margin-top:9px}.library-book-copy h3 button{font-size:23px}.library-book-copy .book-author{font-size:10px;margin-top:7px}.library-book-copy>p:not(.book-author){font-size:10px;line-height:1.85;margin-top:10px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}.book-status{font-size:8px;flex-wrap:wrap;gap:2px;margin-top:9px}.library-book .book-actions{gap:14px;flex-wrap:wrap;margin-top:13px}.library-book .button{font-size:10px;min-height:44px;padding:10px 14px;gap:12px}.library-book .text-button{font-size:9px;min-height:44px}.library-values{gap:17px;margin-top:25px;padding-top:25px}.library-values>div{display:block}.library-values>div>span{font-size:21px;display:block;margin-bottom:13px}.library-values h3{font-size:14px;white-space:nowrap}.library-values p{font-size:9px;line-height:1.8}.book-intro{grid-template-columns:103px minmax(0,1fr);padding:23px 20px;gap:23px;align-items:start}.intro-copy>.eyebrow{font-size:7px;letter-spacing:1px}.intro-copy h1{font-size:31px;letter-spacing:3px;margin-top:14px}.intro-author{font-size:11px}.intro-description{font-size:10px;line-height:1.9;margin-top:15px}.book-facts{gap:17px;margin-top:18px;flex-wrap:wrap}.book-facts>span{font-size:8px}.book-facts strong{font-size:15px}.intro-actions{flex-wrap:wrap;gap:8px;margin-top:19px}.intro-actions .button{min-width:0;width:100%;min-height:44px;font-size:11px;padding:9px}.intro-copy .subtle{font-size:8px;line-height:1.8}.detail-sections{grid-template-columns:1fr;gap:34px;margin-block:34px}.detail-sections h2,.detail-catalog h2{font-size:21px}.detail-sections .section-heading>.eyebrow{display:none}.detail-chapters{grid-template-columns:1fr}.detail-chapters button{font-size:12px;padding-inline:5px;min-height:52px}.detail-catalog .section-heading{gap:10px}.detail-catalog .text-button{font-size:10px}.reading-toolbar{height:59px;padding-inline:10px}.reading-toolbar>div{gap:0}.toolbar-book,.toolbar-divider{display:none}.toolbar-button{padding:9px 10px;font-size:16px;gap:5px}.toolbar-button>span{font-size:9px}.toolbar-button.ai-toggle{padding-inline:11px;margin-left:4px}.reader-center{padding:17px 25px 40px}.reader-chapter-line{font-size:8px;margin-bottom:4px}.reader-chapter-line label{max-width:62%;font-size:8px;gap:5px}.reader-chapter-line select{max-width:140px;font-size:9px;min-height:36px}.chapter-opening{padding:31px 3px 35px}.chapter-opening h1{font-size:24px;line-height:1.8;letter-spacing:1px;margin-top:18px}.chapter-kicker{font-size:13px}.chapter-ornament{font-size:8px;letter-spacing:3px;gap:10px}.chapter-ornament:before,.chapter-ornament:after{width:24px}.reader-paper .paragraph-number{left:-22px;width:17px;font-size:7px;opacity:.55}.reader-paper .paragraph{margin-bottom:11px}.reader-paper .paragraph p{letter-spacing:.4px}.paragraph-bookmark{right:-25px;width:23px;opacity:.6;font-size:14px}.reader-source{margin-top:32px;font-size:9px}.reader-source>span{font-size:12px}.chapter-pagination{margin-block:29px 32px}.chapter-pagination .button{min-height:44px;font-size:11px;padding-inline:15px}.reader-study>summary{padding:17px;font-size:14px}.reader-study>summary small{font-size:8px}.reader-study .study-panel-heading{padding-inline:16px}.selection-actions{bottom:20px;padding:4px}.selection-actions>span{display:none}.selection-actions button{padding-inline:10px;font-size:11px}.return-location{top:69px;font-size:10px;padding-inline:16px}}