:root{--blue:#2563eb;--blue-dark:#1d4ed8;--blue-soft:#eff5ff;--ink:#182234;--muted:#657187;--line:#e5e9f0;--surface:#f8fafc;--radius:9px;--font:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:120px}body{margin:0;color:var(--ink);background:white;font:16px/1.6 var(--font);-webkit-font-smoothing:antialiased}a{color:var(--blue);text-decoration:none}a:hover{color:var(--blue-dark)}button,input,textarea,select{font:inherit;touch-action:manipulation}button{cursor:pointer;color:inherit}button:disabled{cursor:wait;opacity:.55}:focus-visible{outline:3px solid #91b5ff;outline-offset:4px}h1,h2,h3,p{margin:0}h1,h2,h3{line-height:1.35;letter-spacing:-.025em}h1{font-size:32px;font-weight:650}h2{font-size:22px;font-weight:650}h3{font-size:17px;font-weight:600}p{color:var(--muted)}.icon{width:20px;height:20px;flex-shrink:0;vertical-align:middle}.skip{position:fixed;left:16px;top:-80px;background:var(--blue);color:#fff;padding:10px 20px;z-index:100}.skip:focus{top:8px}.sr-only{position:absolute;width:1px;height:1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}[hidden]{display:none!important}
.topbar{height:80px;padding:0 max(32px,calc((100vw - 1200px)/2));display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);background:#fff;position:sticky;top:0;z-index:30;gap:28px}.brand{display:inline-flex;align-items:center;color:var(--ink);font-size:26px;font-weight:750;letter-spacing:-1.1px;line-height:1}.brand:hover{color:var(--ink)}.brand-mark{display:grid;place-items:center;background:var(--blue);color:#fff;width:31px;height:31px;border-radius:8px;margin-right:10px}.brand-mark .icon{width:23px;height:23px;stroke-width:2.6}.brand-period{color:var(--blue)}.topbar nav{display:flex;gap:32px;align-items:center}.topbar nav a{font-size:14px;font-weight:500;color:#536078;white-space:nowrap}.topbar nav a:hover,.topbar nav a[aria-current]{color:var(--blue)}.header-action{font-size:14px;font-weight:600;display:flex;gap:10px;align-items:center;color:var(--ink);white-space:nowrap}.header-action .icon{width:17px}.header-action.language{padding:6px 12px;border:1px solid var(--line);border-radius:6px}.button{display:inline-flex;align-items:center;justify-content:center;gap:9px;padding:11px 19px;border:1px solid var(--blue);border-radius:7px;background:var(--blue);color:#fff;font-size:14px;font-weight:600;line-height:1.5;white-space:nowrap;box-shadow:0 1px 2px #172b4d08}.button:hover{background:var(--blue-dark);color:#fff;border-color:var(--blue-dark)}.button.secondary{background:#fff;border-color:#dce2ec;color:#364358}.button.secondary:hover{background:var(--surface);border-color:#b9c6da}.button .icon{width:17px;height:17px}.hero-actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.badge{display:inline-flex;align-items:center;font-size:12px;font-weight:500;border-radius:5px;padding:3px 8px;white-space:nowrap;line-height:1.6}.badge.neutral{color:#647084;background:#f1f4f8}.badge.blue{color:#275bb3;background:#eef4ff}.badge.amber{color:#945d19;background:#fff5e7}.badge.green{color:#2c7256;background:#eef8f2}.eyebrow{font-size:12px;font-weight:600;letter-spacing:.13em;color:#7b8aa2}.fineprint{font-size:12px;color:#7b8798;margin-top:15px}.footer{padding:32px max(32px,calc((100vw - 1200px)/2));display:flex;gap:28px;align-items:center;border-top:1px solid var(--line);background:#fff}.footer-brand{color:var(--ink);font-weight:750;font-size:21px;letter-spacing:-.6px}.footer p{font-size:13px}.footer small{font-size:12px;color:#8590a1;margin-left:auto}
/* Homepage */
.landing-hero{padding:60px 24px 0;text-align:center}.announcement{display:inline-flex;gap:9px;align-items:center;padding:6px 12px;background:var(--blue-soft);border:1px solid #e2ebfe;border-radius:100px;font-size:12px;color:#3d65a9}.announcement .icon{width:14px;height:14px}.status-dot{width:6px;height:6px;border-radius:50%;background:var(--blue)}.landing-hero h1{font-size:58px;line-height:1.27;letter-spacing:-2.5px;font-weight:700;margin-top:27px}.landing-hero h1 span{color:var(--blue)}.hero-description{font-size:17px;line-height:1.9;margin-top:23px;color:#738096}.landing-hero .hero-actions{justify-content:center;margin-top:29px}.hero-footnote{font-size:12px;color:#929bae;margin-top:15px}.product-preview{max-width:910px;margin:49px auto 0;border:1px solid #dde4ef;border-radius:12px;text-align:left;box-shadow:0 18px 48px -20px #1c406e2b;overflow:hidden;background:#fff}.preview-top{height:47px;display:flex;align-items:center;justify-content:space-between;padding:0 22px;border-bottom:1px solid var(--line);background:#fafbfd;font-size:14px;font-weight:550}.preview-top>span:first-child{display:flex;align-items:center;gap:9px}.preview-top .icon{width:16px}.preview-content{display:grid;grid-template-columns:1.15fr 1fr}.preview-input{padding:27px 30px;border-right:1px solid var(--line)}.preview-input h3{margin-top:10px;font-size:18px}.preview-input blockquote{margin:19px 0;color:#67758b;font-size:14px;line-height:1.9}.sample-product{display:flex;align-items:center;gap:10px}.product-icon{display:grid;place-items:center;background:#f0f4fa;border:1px solid var(--line);color:#8a99ad;border-radius:6px;height:34px;width:34px}.product-icon .icon{width:17px}.sample-product b{font-size:12px;font-weight:550;display:block}.sample-product div>span{display:block;font-size:12px;color:#8f9aad}.preview-result{padding:27px 30px}.preview-result>.eyebrow{margin-bottom:13px}.preview-decision{display:flex;justify-content:space-between;align-items:center;font-size:14px;margin-top:12px}.preview-result>a{font-size:12px;display:flex;align-items:center;gap:6px;margin-top:20px}.preview-result>a .icon{width:14px}.preview-bottom{padding:10px 22px;display:flex;justify-content:space-between;gap:20px;background:#fcfdff;border-top:1px solid var(--line);font-size:12px;color:#8b97aa}.preview-bottom .icon{width:13px;height:13px;margin-right:5px;color:#547dba}.landing-section{max-width:1200px;margin:auto;padding:112px 24px 98px}.section-heading{display:flex;justify-content:space-between;align-items:flex-end;margin-bottom:32px;gap:32px}.section-heading h2{font-size:34px;margin-top:13px}.section-heading>p{font-size:14px;line-height:1.9}.scenario-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.scenario-card{border:1px solid var(--line);border-radius:10px;padding:22px;color:var(--ink);display:flex;flex-direction:column;transition:border-color .15s,box-shadow .15s}.scenario-card:hover{border-color:#afc8f5;color:var(--ink);box-shadow:0 5px 20px #33496609}.scenario-card-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:26px;color:#a0acbf;font-size:12px}.icon-tile{width:38px;height:38px;border:1px solid #e1eaff;border-radius:8px;background:#f5f8ff;display:grid;place-items:center;color:var(--blue)}.scenario-card small{font-size:12px;color:#7f8da2}.scenario-card h3{margin-top:8px;font-size:17px;line-height:1.6}.scenario-card p{font-size:14px;line-height:1.8;margin:12px 0 25px}.card-link{display:flex;align-items:center;gap:7px;color:var(--blue);font-size:14px;margin-top:auto}.card-link .icon{width:15px}.landing-book{background:#f7f9fd;border-block:1px solid #edf0f6;padding:76px 24px}.landing-book-inner{max-width:960px;margin:auto;display:grid;grid-template-columns:1.6fr 1fr;gap:100px;align-items:center}.landing-book h2{font-size:36px;line-height:1.45;margin:15px 0 20px}.landing-book p:not(.eyebrow):not(.fineprint){font-size:14px;line-height:1.95}.book-facts{display:flex;gap:37px;margin:25px 0 31px}.book-facts>span{font-size:12px;color:#8190a5}.book-facts b{display:block;color:#3c506e;font-size:21px;font-weight:550;margin-bottom:3px;letter-spacing:-.5px}.book-cover{width:268px;min-height:360px;padding:26px 28px 23px;background:#255dd5;color:#fff;border-radius:2px 7px 7px 2px;box-shadow:inset 7px 0 #1847ac,8px 12px 25px #1d40701a;display:flex;flex-direction:column;justify-content:space-between}.book-cover>span{font-size:9px;letter-spacing:.1em;color:#c5d7ff;border-bottom:1px solid #ffffff3b;padding-bottom:13px}.book-cover>strong{font-size:61px;letter-spacing:-3px;line-height:1.03;margin:30px 0 26px;font-weight:650}.book-cover b{font-size:17px;font-weight:550}.book-cover div>p{color:#bacefc;font-size:12px!important;line-height:1.6!important;margin:6px 0 20px}.book-cover>small{font-size:8px;letter-spacing:.09em;border-top:1px solid #ffffff3b;padding-top:15px;color:#c5d7ff;display:flex;justify-content:space-between}.landing-end{padding:62px 24px;text-align:center}.landing-end p{font-size:20px;font-weight:500;color:#46566d}.landing-end a{display:inline-flex;align-items:center;gap:8px;margin-top:17px;font-size:14px}
/* Working surface */
.app-body .topbar{padding:0 30px;height:72px}.app-body .topbar nav{margin-left:auto}.app-layout{display:grid;grid-template-columns:230px minmax(0,1fr);min-height:calc(100vh - 166px)}.app-sidebar{border-right:1px solid var(--line);padding:27px 17px;background:#fcfdff}.side-caption{font-size:12px;letter-spacing:.1em;color:#8795aa;margin:0 12px 12px}.app-nav{display:grid;gap:5px}.app-nav>a{padding:10px 12px;display:flex;align-items:center;gap:11px;border-radius:6px;color:#67748a;font-size:14px}.app-nav .icon{height:17px;width:17px}.app-nav>a.active{background:#edf3ff;color:var(--blue);font-weight:550}.app-nav>a:hover{background:#f0f4fa}.side-note{margin:35px 10px 10px;padding-top:22px;border-top:1px solid var(--line)}.side-note>.icon{color:#9eabc0;width:18px}.side-note strong{display:block;font-size:14px;margin-top:7px;font-weight:550}.side-note p{font-size:12px;line-height:1.8;margin-top:5px}.side-note a{font-size:12px;display:flex;align-items:center;gap:6px;margin-top:13px}.side-note a .icon{width:13px}.app-main{min-width:0;width:100%;max-width:1550px;padding:38px 40px 60px;margin:auto}.app-main.book-main{margin:0 auto}.page-heading{display:flex;justify-content:space-between;align-items:center;gap:24px;margin-bottom:28px}.page-heading h1{font-size:29px;margin:8px 0}.page-heading p:not(.eyebrow){font-size:14px}.heading-actions{display:flex;align-items:center;gap:10px}.panel{border:1px solid var(--line);border-radius:var(--radius);background:#fff}.panel h2{font-size:16px}.workspace-notice{display:flex;gap:12px;align-items:center;padding:14px 17px;border:1px solid #e2e9f5;background:#f8faff;border-radius:8px}.workspace-notice>.icon{color:#6d8fcb;width:18px}.workspace-notice p{flex:1}.workspace-notice strong{display:block;font-size:14px;color:#536b8e;font-weight:550}.workspace-notice p>span{display:block;font-size:12px;margin-top:3px;color:#7a8ba4}.text-button{border:0;padding:5px 0;background:none;color:var(--blue);font-size:14px;white-space:nowrap}.metric-grid{display:grid;grid-template-columns:repeat(3,1fr);margin:24px 0;border:1px solid var(--line);border-radius:var(--radius)}.metric-grid>div{padding:22px 24px}.metric-grid>div+div{border-left:1px solid var(--line)}.metric-grid span{font-size:14px;color:#627086;display:block}.metric-grid strong{display:block;font-size:33px;font-weight:600;line-height:1.25;margin:9px 0 7px;font-variant-numeric:tabular-nums;letter-spacing:-1px}.metric-grid small{font-size:12px;color:#8c98a8}.distribution{display:grid;grid-template-columns:1fr 1.6fr;gap:32px;padding:24px;margin-bottom:25px}.distribution p{font-size:14px;margin-top:8px}.distribution small{display:block;font-size:12px;color:#8291a7;line-height:1.8;margin-top:20px}.category-bars{display:grid;gap:13px}.bar-row{display:grid;grid-template-columns:85px 1fr 75px;align-items:center;gap:14px;padding:0;border:0;background:none;text-align:left;font-size:14px;color:#6c7a90}.bar-row:hover{color:var(--blue)}.bar-track{height:8px;border-radius:2px;background:#f0f3f8;overflow:hidden}.bar-fill{display:block;height:100%;background:#7c9ee8;border-radius:2px}.bar-row:first-child .bar-fill{background:#3b70dc}.bar-value{text-align:right;color:#75839a;font-variant-numeric:tabular-nums;font-size:12px}.review-toolbar{display:flex;justify-content:space-between;align-items:center;padding:19px 22px;gap:16px}.review-toolbar>div:first-child{display:flex;gap:10px;align-items:center}.review-toolbar>div>span{color:#8995a7;font-size:12px}.review-filters{display:flex;gap:8px}select{background:#fff;border:1px solid #dfe5ed;color:#52617a;padding:7px 28px 7px 10px;border-radius:6px;font-size:14px;max-width:100%}.review-table-wrap{overflow-x:auto}.review-table{width:100%;border-collapse:collapse;font-size:14px;text-align:left;table-layout:fixed}.review-table th{padding:10px 16px;background:#fafbfd;color:#8390a3;font-weight:450;border-block:1px solid var(--line);font-size:12px}.review-table th:first-child{width:65px;padding-left:22px}.review-table th:nth-child(2){width:43%}.review-table th:nth-child(3){width:22%}.review-table th:nth-child(4){width:105px}.review-table th:last-child{width:60px}.review-table td{padding:17px 16px;border-bottom:1px solid #edf0f5;vertical-align:top;line-height:1.85;color:#53617a;overflow-wrap:anywhere}.review-table td:first-child{color:#9aa5b6;font-size:12px;padding-left:22px}.review-table td .badge{margin:0 3px 5px 0}.review-table tr:last-child td{border-bottom:0}.review-table .text-button{font-size:14px;padding:0}.review-table td.review-text{color:#4c5b72}.review-table tr:hover{background:#fcfdff}.table-foot{border-top:1px solid var(--line);padding:13px 22px;font-size:12px;color:#8a97aa;display:flex;justify-content:space-between;gap:16px}.workspace-help{font-size:12px;margin-top:18px;color:#8c97a8}.empty-state{text-align:center;padding:38px 20px}.empty-state p{font-size:14px;margin:8px 0 20px}
/* Scenario experience */
.scenario-tabs{display:grid;grid-template-columns:repeat(4,1fr);border-bottom:1px solid var(--line);gap:16px;margin-bottom:28px}.scenario-tabs button{border:0;border-bottom:2px solid transparent;background:none;font-size:14px;color:#7e8a9e;padding:15px 5px;display:flex;align-items:center;justify-content:center;gap:8px}.scenario-tabs button .icon{width:17px}.scenario-tabs button[aria-selected=true]{border-bottom-color:var(--blue);color:var(--blue)}.experience{border:1px solid var(--line);border-radius:10px;overflow:hidden}.experience-heading{padding:26px 28px;display:flex;justify-content:space-between;align-items:flex-start;gap:20px;border-bottom:1px solid var(--line)}.experience-heading h2{margin-top:9px;font-size:23px}.experience-heading p:not(.eyebrow){font-size:14px;margin-top:8px}.experience-grid{display:grid;grid-template-columns:1.05fr 1fr}.experience-source,.experience-output{padding:29px}.experience-source{border-right:1px solid var(--line);background:#fcfdff}.panel-label{display:flex;justify-content:space-between;align-items:center;gap:10px}.panel-label h3{font-size:14px}.sample-picker{font-size:12px;display:flex;align-items:center;gap:8px;color:#8d99aa}.sample-picker select{font-size:12px;padding:5px 8px}.experience-source blockquote{font-size:16px;line-height:1.9;margin:25px 0 30px;color:#455570;white-space:pre-wrap;min-height:110px}.question-box{padding:17px;background:#f1f5fb;border:1px solid #e7edf6;border-radius:7px}.question-box span{font-size:12px;color:#8291a7}.question-box p{font-size:14px;color:#5b7396;margin-top:6px}.result-label{display:inline-block;padding:7px 12px;border:1px solid #d8e7fd;background:var(--blue-soft);color:#2c61b8;border-radius:6px;font-size:17px;margin:18px 0 24px}.experience-output h3{font-size:14px;margin-bottom:7px;color:#6c7b92}.experience-output>p:not(.eyebrow){font-size:14px;line-height:1.9}.next-action{display:flex;gap:10px;align-items:center;padding-top:24px;border-top:1px solid var(--line);margin-top:28px;color:var(--blue)}.next-action span{display:block;font-size:12px;color:#8998ae}.next-action strong{font-size:14px;color:#4f6686;font-weight:500;display:block;margin-top:4px}.experience-footer{border-top:1px solid var(--line);padding:15px 27px;display:flex;align-items:center;justify-content:space-between;gap:20px}.experience-footer p{font-size:12px;color:#8491a6}.experience-footer a{font-size:14px;white-space:nowrap}.experience-footer .icon{width:14px}.next-strip{margin-top:28px;padding:25px 0;display:flex;justify-content:space-between;gap:20px;align-items:center}.next-strip h3{font-size:17px}.next-strip p{font-size:14px;margin-top:8px}
/* Handbook */
.chapter-contents{border-top:1px solid var(--line);margin-top:23px;padding:20px 0 0}.chapter-contents>summary{font-size:12px;letter-spacing:.09em;color:#8e9cb1;cursor:pointer;margin:0 12px 12px;list-style:none}.chapter-contents>summary::after{content:'−';float:right}.chapter-contents:not([open])>summary::after{content:'+'}.chapter-contents nav{display:grid;gap:2px}.chapter-nav{font-size:13px;color:#77849a;display:flex;gap:10px;align-items:baseline;padding:8px 9px;border-radius:5px;line-height:1.6}.chapter-nav>span{font-variant-numeric:tabular-nums;font-size:12px;color:#a0acbd}.chapter-nav.active{color:var(--blue);background:#eef4ff}.chapter-nav.active>span{color:#73a0ed}.chapter-nav:hover{background:#f0f4fa}.book-heading{display:flex;justify-content:space-between;gap:35px;align-items:center;padding:9px 0 38px}.book-heading>div:first-child{max-width:600px}.book-heading h1{font-size:38px;margin:13px 0 18px}.book-heading p:not(.eyebrow):not(.fineprint){font-size:16px;line-height:1.9;max-width:430px}.book-metadata{display:flex;gap:20px;flex-wrap:wrap;color:#8795a8;font-size:12px;margin:20px 0 23px}.book-heading .book-cover{width:216px;min-width:216px;min-height:302px;padding:22px}.book-heading .book-cover>strong{font-size:50px;margin:26px 0 20px}.book-heading .book-cover>span{font-size:7px}.book-heading .book-cover b{font-size:14px}.book-heading .book-cover>small{font-size:6px}.code-download{display:inline-flex;align-items:center;gap:8px;font-size:12px;margin-top:15px;color:#8493a9}.code-download .icon{width:13px}.section-label{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);padding:12px 0 19px;gap:20px}.section-label h2{font-size:18px}.section-label span{font-size:12px;color:#94a0b2}.index-row{display:flex;align-items:center;gap:23px;border-bottom:1px solid var(--line);padding:23px 6px;color:var(--ink)}.index-row:hover{background:#fafcff}.index-number{font-size:12px;color:#8e9eb6;align-self:flex-start;padding-top:3px}.index-row h3{font-size:16px;font-weight:550}.index-row p{font-size:14px;margin-top:6px;line-height:1.8}.index-row>.icon{margin-left:auto;flex-shrink:0;width:17px;color:#94a6be}.editorial-note{margin-top:32px;padding:24px;background:#f8faff;border:1px solid #e7edf7;border-radius:8px}.editorial-note h3{font-size:16px}.editorial-note p{font-size:14px;line-height:1.9;margin:9px 0 13px}.editorial-note a{font-size:14px}.editorial-note .icon{width:14px}.reader-topline{display:flex;align-items:center;gap:13px;font-size:12px;color:#a0adbf;margin-bottom:30px}.reader-topline>a:first-child{color:#8494ae}.reader-download{margin-left:auto;display:flex;align-items:center;gap:6px}.reader-download .icon{width:14px}.reader-grid{display:grid;grid-template-columns:minmax(0,750px) 170px;gap:50px;justify-content:center}.chapter{min-width:0}.chapter 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.review-table-wrap{position:relative}
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