:root{color-scheme:light;--paper:#fff8e7;--surface:#fffdf5;--ink:#163c2d;--muted:#456456;--primary:#1c513b;--on-primary:#fff8e7;--honey:#efbd4e;--on-honey:#163c2d;--line:#b4b89e;--todo:#fff0bf;--on-todo:#4b3515;--code:#122d22;--on-code:#e9f4e5;--shadow:0 18px 55px rgba(22,60,45,.09)}
:root[data-theme=dark]{color-scheme:dark;--paper:#10271e;--surface:#17362b;--ink:#fff6df;--muted:#c2cfbd;--primary:#c7e5cb;--on-primary:#10271e;--honey:#f1c65b;--on-honey:#10271e;--line:#789081;--todo:#4b391d;--on-todo:#ffe7a0;--code:#081b12;--on-code:#e9f4e5;--shadow:0 18px 55px rgba(0,0,0,.15)}
*{box-sizing:border-box}html{scroll-padding-top:105px}body{margin:0;background:var(--paper);color:var(--ink);font:17px/1.85 "PingFang SC","Noto Sans SC","Microsoft YaHei",sans-serif;overflow-wrap:anywhere}h1,h2,h3{font-family:ui-rounded,"SF Pro Rounded","PingFang SC",sans-serif;line-height:1.3;letter-spacing:-.035em;text-wrap:pretty}h1{font-size:clamp(38px,5.8vw,76px);margin:15px 0 25px}h2{font-size:clamp(27px,3vw,40px);margin:0 0 18px}h3{font-size:23px;margin:0 0 12px}p{margin:0 0 18px;text-wrap:pretty}a{color:var(--primary);text-underline-offset:.25em}a:hover{text-decoration-thickness:2px}button,input,textarea{font:inherit}button,a.button{cursor:pointer;min-height:44px;border:1px solid var(--primary);border-radius:100px;padding:10px 22px;background:var(--primary);color:var(--on-primary);font-weight:650;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;gap:8px;text-align:center;transition:transform .16s,box-shadow .16s}button:hover,a.button:hover{transform:translateY(-2px);box-shadow:var(--shadow)}button.secondary,a.button.secondary{background:var(--surface);color:var(--primary)}button.honey,a.button.honey{background:var(--honey);color:var(--on-honey);border-color:var(--honey)}:focus-visible{outline:3px solid var(--primary);outline-offset:5px}img{max-width:100%;height:auto;display:block}figure{margin:0}figcaption,.small{font-size:14px;color:var(--muted)}.muted{color:var(--muted)}.wrap{max-width:1180px;margin:auto;padding:0 30px}.site-header{position:sticky;top:0;z-index:10;background:var(--paper);border-bottom:1px solid var(--line)}.header-inner{max-width:1320px;margin:auto;padding:14px 30px;display:flex;align-items:center;gap:26px;flex-wrap:wrap}.brand{display:flex;gap:10px;align-items:center;font-weight:750;text-decoration:none;line-height:1.3}.brand img{width:34px;height:34px}.brand small{display:block;font-size:11px;letter-spacing:.14em;color:var(--muted)}.main-nav{display:flex;gap:22px;margin-left:auto;flex-wrap:wrap;font-size:14px}.main-nav a{text-decoration:none}.theme-toggle{padding:6px 16px;font-size:14px;background:var(--surface);color:var(--primary)}.skip{position:fixed;top:-100px;left:20px;z-index:100;background:var(--honey);color:var(--on-honey);padding:12px}.skip:focus{top:12px}.eyebrow{display:inline-block;text-transform:uppercase;letter-spacing:.16em;font-size:13px;font-weight:750;color:var(--muted)}.hero{display:grid;grid-template-columns:1.02fr 1fr;gap:64px;align-items:center;padding-top:70px;padding-bottom:76px}.hero-copy{max-width:550px}.hero-copy .lead{font-size:20px;max-width:470px;color:var(--muted)}.actions{display:flex;gap:12px;flex-wrap:wrap;margin:26px 0}.hero-art{position:relative;padding:22px 24px 45px}.hero-art:before{content:"";position:absolute;inset:8% 0;background:var(--honey);border-radius:50% 40% 46% 34%}.hero-pages{position:relative;display:grid;grid-template-columns:1fr 1fr;gap:16px;align-items:start}.hero-pages figure{background:var(--surface);padding:9px;box-shadow:var(--shadow);border:1px solid var(--line);border-radius:10px;transform:rotate(-5deg)}.hero-pages figure+figure{margin-top:62px;transform:rotate(5deg)}.hero-pages img{border-radius:4px}.hero-pages figcaption{padding:8px 5px 1px;font-size:12px}.hero-stamp{position:absolute;bottom:0;left:12%;padding:12px 24px;border-radius:100px;background:var(--primary);color:var(--on-primary);font-size:14px;box-shadow:var(--shadow)}.strip{border-top:1px solid var(--line);border-bottom:1px solid var(--line);display:grid;grid-template-columns:repeat(3,1fr);padding:24px 0;gap:30px}.strip strong{display:block;font-size:21px}.strip p{margin:6px 0 0;font-size:14px;color:var(--muted)}.section{padding:70px 0}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:30px;margin-bottom:26px}.section-heading p{max-width:430px;margin:0;color:var(--muted)}.gallery{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:16px}.gallery-item{background:var(--surface);padding:9px;border-radius:12px;border:1px solid var(--line);min-width:0}.gallery-item button{display:block;padding:0;border:0;border-radius:5px;background:none;min-height:0;width:100%}.gallery-item figcaption{margin-top:8px;line-height:1.5}.gallery-item img{width:100%;border-radius:4px}.books-grid,.two-column{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}.book-card,.card{padding:32px;border:1px solid var(--line);background:var(--surface);border-radius:24px}.book-card{display:grid;grid-template-columns:105px minmax(0,1fr);gap:25px;align-items:start}.book-card img{border-radius:8px;box-shadow:var(--shadow)}.book-card h3{font-size:25px}.book-card .actions{margin:15px 0}.book-card .button{padding:8px 14px;font-size:14px}.book-meta{font-size:14px;color:var(--muted)}.bubble{position:relative;padding:24px 30px;background:var(--honey);color:var(--on-honey);border-radius:28px;margin:30px 0}.bubble:after{content:"";position:absolute;bottom:-12px;left:36px;border-top:15px solid var(--honey);border-right:19px solid transparent}.bubble p:last-child{margin:0}.course-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.course-card{display:flex;flex-direction:column;gap:12px;min-height:220px;padding:28px;background:var(--surface);border:1px solid var(--line);border-radius:20px;text-decoration:none;color:var(--ink)}.course-card:hover{box-shadow:var(--shadow)}.course-card .number{font-size:13px;color:var(--muted);letter-spacing:.16em}.course-card h3{font-size:23px;margin:0}.course-card p{font-size:15px;color:var(--muted);margin:0}.course-card .arrow{margin-top:auto;font-size:14px;color:var(--primary)}.speaker{display:grid;grid-template-columns:1fr 1.1fr;gap:60px;align-items:start;padding:42px;background:var(--primary);color:var(--on-primary);border-radius:30px}.speaker h2{font-size:32px}.speaker p{color:var(--on-primary)}.speaker .eyebrow{color:var(--on-primary)}details{border-bottom:1px solid var(--line);padding:20px 0}summary{cursor:pointer;font-weight:700;min-height:44px;display:list-item;padding:6px 0}details p{padding-top:14px;color:var(--muted)}footer{padding:42px 0;border-top:1px solid var(--line);font-size:14px;color:var(--muted)}footer .footer-links{display:flex;gap:20px;flex-wrap:wrap;margin-top:15px}.progress-strip{height:5px;background:var(--line)}.progress-fill{height:100%;width:0;background:var(--primary);transition:width .2s}.lesson-shell{display:grid;grid-template-columns:190px minmax(0,1fr);gap:60px;padding-top:40px;padding-bottom:70px}.lesson-toc{position:sticky;top:115px;align-self:start;font-size:14px}.lesson-toc a{display:block;padding:8px 0;text-decoration:none;color:var(--muted)}.lesson-toc .current{font-weight:750;color:var(--primary)}.lesson-toc .toc-title{letter-spacing:.13em;font-size:12px;margin-bottom:15px}.lesson-content{min-width:0;max-width:840px}.lesson-heading{padding:25px 0 30px;border-bottom:1px solid var(--line);margin-bottom:40px}.lesson-heading h1{font-size:clamp(34px,4vw,58px);margin:14px 0 20px}.lesson-heading .lead{font-size:20px;color:var(--muted)}.lesson-section{margin:0 0 50px}.lesson-section h2{font-size:29px}.lesson-section h3{font-size:22px;margin-top:24px}.goals{display:grid;gap:10px;padding:23px 28px;border-radius:20px;background:var(--surface);border:1px solid var(--line)}.goals p{margin:0}.step{margin-bottom:23px}.step .step-title{display:flex;gap:12px;align-items:start}.step .step-index{display:inline-flex;min-width:30px;min-height:30px;justify-content:center;align-items:center;background:var(--honey);color:var(--on-honey);border-radius:50%;font-size:13px}.step h3{margin:0 0 9px}.case{padding:25px;background:var(--surface);border:1px solid var(--line);border-radius:24px;display:grid;grid-template-columns:190px minmax(0,1fr);gap:27px;align-items:start}.case figure button{background:transparent;border:0;padding:0;border-radius:8px;display:block;min-height:0}.case img{border-radius:8px;width:100%}.case figcaption{margin-top:8px;line-height:1.6}.case h3{margin:0 0 12px}.case p{font-size:16px}.case .case-stage{font-size:13px;letter-spacing:.12em;color:var(--muted);font-weight:750;margin-bottom:5px}.prompt-card{border:1px solid var(--line);border-radius:22px;overflow:hidden;background:var(--surface)}.prompt-top{display:flex;justify-content:space-between;align-items:center;padding:17px 22px;gap:15px;flex-wrap:wrap}.prompt-top p{margin:0;font-size:13px;color:var(--muted)}.prompt-card pre{margin:0;background:var(--code);color:var(--on-code);padding:26px;white-space:pre-wrap;overflow-wrap:anywhere;word-break:break-word;font:14px/1.85 ui-monospace,SFMono-Regular,Consolas,monospace;max-width:100%}.copy-button{font-size:14px;padding:7px 18px}.todo{border:1px dashed var(--on-todo);border-radius:18px;padding:22px 26px;background:var(--todo);color:var(--on-todo);margin:25px 0}.todo strong{display:block;margin-bottom:7px}.todo p{margin:0;font-size:15px}.checklist{list-style:none;padding:0;margin:0;display:grid;gap:12px}.checklist label{display:flex;align-items:start;gap:13px;padding:14px 18px;background:var(--surface);border:1px solid var(--line);border-radius:13px;cursor:pointer}.checklist input{margin-top:8px;accent-color:var(--primary);width:17px;height:17px;flex-shrink:0}.homework{padding:25px 30px;border:1px solid var(--line);border-radius:20px;background:var(--surface)}.homework p:last-child{margin:0}.lesson-footer{display:flex;flex-wrap:wrap;justify-content:space-between;gap:18px;border-top:1px solid var(--line);padding-top:25px}.lesson-pagination{display:flex;gap:12px;flex-wrap:wrap}.complete-label{display:flex;align-items:center;gap:10px;font-size:15px;cursor:pointer;min-height:44px}.complete-label input{width:18px;height:18px;accent-color:var(--primary)}.table-scroll{width:100%;overflow:auto;border-radius:12px;border:1px solid var(--line)}table{width:100%;border-collapse:collapse;font-size:14px}th,td{text-align:left;vertical-align:top;border-bottom:1px solid var(--line);padding:14px}th{background:var(--surface)}code.inline{background:var(--surface);padding:2px 6px;border-radius:5px}.medical-notice{background:var(--todo);color:var(--on-todo);padding:20px 25px;border:1px solid var(--on-todo);border-radius:16px;margin:0 0 25px;font-weight:650}.status{position:fixed;bottom:25px;left:50%;transform:translateX(-50%);padding:12px 23px;border-radius:100px;background:var(--primary);color:var(--on-primary);z-index:60;box-shadow:var(--shadow);max-width:90vw;text-align:center}.status:empty{display:none}dialog{width:min(950px,94vw);max-height:94vh;border:1px solid var(--line);border-radius:20px;background:var(--surface);color:var(--ink);padding:18px}dialog::backdrop{background:rgba(0,0,0,.75)}.dialog-top{display:flex;justify-content:space-between;gap:20px;align-items:start;margin-bottom:15px}.dialog-top p{font-size:14px;margin:0}.dialog-image{max-height:76vh;margin:auto;object-fit:contain}.download-note{font-size:13px;margin:10px 0 0;color:var(--muted)}.utility{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.privacy-note{font-size:13px;color:var(--muted)}
@media(max-width:1000px){.hero{gap:30px}.lesson-shell{grid-template-columns:150px minmax(0,1fr);gap:30px}.gallery{grid-template-columns:repeat(3,minmax(0,1fr))}.course-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.book-card{grid-template-columns:78px minmax(0,1fr);padding:22px;gap:18px}.speaker{gap:30px}.main-nav{gap:15px}}
@media(max-width:700px){body{font-size:16px}.wrap{padding:0 20px}.header-inner{padding:12px 20px;gap:10px 16px}.brand{font-size:15px}.main-nav{order:3;width:100%;margin-left:0;justify-content:space-between;font-size:13px;gap:8px}.theme-toggle{margin-left:auto;font-size:13px;padding:6px 12px}.hero{grid-template-columns:1fr;padding-top:40px;padding-bottom:50px;gap:20px}.hero-copy .lead{font-size:18px}.hero-art{max-width:450px;width:100%;margin:auto;padding:15px 20px 35px}.hero-pages figure+figure{margin-top:30px}.hero-stamp{font-size:12px;padding:10px 16px}.strip{grid-template-columns:1fr;padding:22px 0;gap:18px}.strip strong{font-size:18px}.section{padding:45px 0}.section-heading{display:block}.section-heading p{margin-top:15px}.gallery{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.books-grid,.two-column,.course-grid{grid-template-columns:1fr}.book-card{grid-template-columns:78px minmax(0,1fr)}.speaker{grid-template-columns:1fr;padding:28px;gap:15px}.lesson-shell{display:block;padding-top:20px}.lesson-toc{position:static;border-bottom:1px solid var(--line);padding-bottom:15px;margin-bottom:22px}.lesson-toc .toc-title{display:none}.lesson-toc a{display:inline-block;margin-right:15px;padding:5px 0;font-size:13px}.lesson-heading{padding-top:10px}.lesson-heading .lead{font-size:18px}.case{grid-template-columns:1fr;padding:20px;gap:20px}.case figure{max-width:260px;margin:auto}.prompt-card pre{padding:20px;font-size:13px}.prompt-top{padding:15px 18px}.todo{padding:18px}.lesson-section{margin-bottom:38px}.lesson-footer{display:block}.lesson-pagination{margin-top:20px}.button{width:auto}.medical-notice{padding:18px}.course-card{min-height:190px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{transition:none!important;animation:none!important}button:hover,a.button:hover{transform:none}}
@media print{.site-header,.lesson-toc,.status,.copy-button,.theme-toggle,.lesson-pagination{display:none}body{background:white;color:#111}.lesson-shell{display:block}.wrap{padding:0}.prompt-card pre{color:#111;background:#eee}.case,.card,.prompt-card,.homework{break-inside:avoid}a{color:#111}}