:root{--green:#193f35;--green-light:#315f50;--cream:#f6ecd8;--paper:#fffdf8;--gold:#d4aa4e;--ink:#233d34;--muted:#626958;--line:#e3d7bf;--serif:"STKaiti","KaiTi","Songti SC","SimSun",serif;--content:1240px}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.8 "Microsoft YaHei","PingFang SC",sans-serif}a{color:inherit;text-decoration:none}button{font:inherit;cursor:pointer;color:inherit}button,a{-webkit-tap-highlight-color:transparent}button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid #b77b24;outline-offset:5px}img{display:block;max-width:100%}svg{display:block}[hidden]{display:none!important}.wrap{width:min(var(--content),calc(100% - 96px));margin-inline:auto}.skip{position:fixed;top:-80px;left:20px;z-index:50;padding:12px;background:var(--paper)}.skip:focus{top:12px}.site-header{position:sticky;top:0;z-index:20;background:var(--green);color:var(--cream);border-bottom:1px solid #ffffff1c}.header-inner{min-height:80px;display:flex;align-items:center;gap:32px}.brand{display:flex;align-items:center;gap:12px;flex-shrink:0}.brand svg{width:39px;height:39px;color:#e2be70}.brand strong{display:block;font:700 25px/1.3 var(--serif);letter-spacing:3px}.brand small{display:block;font-size:9px;letter-spacing:2.4px;color:#dfdcc5}.site-nav{display:flex;align-items:center;gap:28px;margin-left:auto;font-size:14px}.site-nav a{min-height:44px;display:flex;align-items:center;white-space:nowrap;border-bottom:2px solid transparent}.site-nav a:hover,.site-nav a[aria-current=page]{color:#f5d78b;border-bottom-color:var(--gold)}.site-nav .nav-account{border:1px solid #d9caa580;border-radius:5px;padding:0 18px;margin-left:5px}.menu-toggle{display:none;margin-left:auto;background:transparent;border:1px solid #ffffff55;border-radius:5px;min-height:44px;padding:0 14px;color:var(--cream)}.eyebrow{display:block;font-size:11px;letter-spacing:3px;font-weight:600;color:#6a765c}.hero{position:relative;overflow:hidden;background:var(--cream);padding:76px 0 66px}.hero-grid{display:grid;grid-template-columns:1.03fr 1fr;align-items:center;gap:56px}.hero h1{font:700 clamp(38px,3.8vw,60px)/1.35 var(--serif);margin:20px 0 24px;letter-spacing:1px}.hero h1 em{font-style:normal;color:#7e6532;position:relative}.hero-lead{max-width:485px;font-size:16px;color:#596451;line-height:2}.actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:30px;align-items:center}.btn{display:inline-flex;align-items:center;justify-content:center;gap:24px;min-height:50px;padding:11px 24px;border:1px solid var(--green);background:var(--green);color:var(--paper);font-weight:600;font-size:14px;border-radius:5px;transition:background .18s}.btn:hover{background:var(--green-light)}.btn.secondary{background:transparent;color:var(--green);border-color:#b6b49c}.btn.secondary:hover{background:#eae0c9}.text-link{display:inline-flex;align-items:center;gap:14px;min-height:44px;font-size:14px;border-bottom:1px solid #73816a}.hero-note{display:flex;gap:18px;margin-top:28px;font-size:12px;color:#646d5b;flex-wrap:wrap}.hero-note span+span{border-left:1px solid #c6c3aa;padding-left:18px}.atlas{position:relative;background:#102d30;border:1px solid #52746a;border-radius:120px 12px 12px 12px;padding:32px 32px 22px;color:#e6ebd9;box-shadow:18px 20px 0 #dedbc3;min-width:0}.atlas-label{display:flex;justify-content:space-between;gap:16px;font-size:10px;letter-spacing:2px;padding-left:50px;color:#d9c78f}.atlas-earth{position:relative;display:grid;place-items:center;aspect-ratio:1.15;isolation:isolate}.atlas-earth:before,.atlas-earth:after{content:"";position:absolute;inset:12%;border:1px solid #a4b99a44;border-radius:50%;transform:rotate(-22deg) scaleX(1.28);z-index:1;pointer-events:none}.atlas-earth:after{inset:7%;transform:rotate(25deg) scaleX(1.13);border-style:dashed;border-color:#c4b47b55}.atlas-earth img{width:87%;height:87%;object-fit:cover;border-radius:50%;mix-blend-mode:screen}.atlas-coord{position:absolute;font:11px/1.5 monospace;color:#d8c58f;right:0;top:35%}.atlas-bottom{display:flex;align-items:center;justify-content:space-between;border-top:1px solid #ffffff26;padding-top:18px;font-size:12px;gap:12px}.atlas-bottom a{color:#f2d899;min-height:44px;display:flex;align-items:center}.chapter-strip{background:#efe7d4;border-top:1px solid #ded4ba;border-bottom:1px solid #ded4ba}.chapter-strip .wrap{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:74px;flex-wrap:wrap;padding-block:12px}.chapter-strip strong{font:700 20px var(--serif)}.chapter-strip span{font-size:13px;color:#5d6756}.section{padding:88px 0}.section-heading{display:flex;justify-content:space-between;align-items:flex-end;gap:32px;margin-bottom:38px}.section-heading h2,.statement h2,.cooperation-intro h1{font:700 clamp(30px,3vw,42px)/1.45 var(--serif);margin:10px 0 0;letter-spacing:1px}.section-heading>p{max-width:390px;color:var(--muted);font-size:14px;margin:0}.value-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:36px}.value-item{padding:28px 0 0;border-top:1px solid #bcbca5}.value-item .number{font:italic 24px Georgia,serif;color:#95773d}.value-item h3{font:700 24px var(--serif);margin:18px 0 12px}.value-item p{font-size:14px;line-height:1.95;color:var(--muted);margin:0}.demo-section{background:#eaf0e9}.demo-header{display:flex;justify-content:space-between;gap:24px;align-items:center;margin-bottom:25px}.demo-tabs{display:flex;gap:8px;flex-wrap:wrap}.demo-tabs button{background:transparent;border:1px solid #aab7a5;border-radius:5px;min-height:46px;padding:8px 20px;font-size:14px}.demo-tabs button[aria-selected=true]{background:var(--green);color:var(--cream);border-color:var(--green)}.demo-label{font-size:12px;color:#65725f}.demo-panel{display:grid;grid-template-columns:minmax(0,1.8fr) minmax(250px,1fr);background:var(--paper);border:1px solid #c9d4c5;border-radius:8px;overflow:hidden}.demo-visual{position:relative;min-width:0;background:#f0f4ec;border-right:1px solid #d5dfd1}.demo-visual img{width:100%;aspect-ratio:16/10;object-fit:cover;object-position:left top}.demo-visual button{position:absolute;bottom:16px;left:18px;border:1px solid #d3d9c8;border-radius:5px;background:var(--paper);padding:7px 14px;min-height:44px;font-size:13px}.demo-copy{padding:32px}.demo-copy .topic{font-size:11px;color:#7b6b44;letter-spacing:1px}.demo-copy h3{font:700 28px/1.5 var(--serif);margin:12px 0 18px}.demo-copy p{font-size:14px;line-height:1.95;color:var(--muted)}.demo-question{border-left:2px solid var(--gold);padding-left:16px;margin-block:24px}.demo-question strong{display:block;font-size:12px;color:#647156}.demo-copy .text-link{font-weight:600}.books-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}.book{display:flex;flex-direction:column;padding:28px 24px 22px;border:1px solid var(--line);border-top:4px solid #6f8465;background:#f9f4e9;min-height:250px;border-radius:4px;transition:background .18s}.book:hover{background:#eee6d3}.book:nth-child(2){border-top-color:#c49d54}.book:nth-child(3){border-top-color:#6b8e8a}.book:nth-child(4){border-top-color:#a28a63}.book-code{font:italic 35px Georgia,serif;color:#8a815d}.book h3{font:700 26px var(--serif);margin:20px 0 8px}.book p{font-size:13px;line-height:1.8;color:var(--muted);margin:0 0 20px}.book-bottom{display:flex;justify-content:space-between;align-items:center;margin-top:auto;font-size:12px;border-top:1px solid #d8cfb7;padding-top:16px}.method-section{background:#f6f0e3}.method-grid{display:grid;grid-template-columns:1fr 1.35fr;gap:80px;align-items:start}.method-intro p{color:var(--muted);font-size:14px;max-width:350px}.method-list{list-style:none;padding:0;margin:0;counter-reset:steps}.method-list li{display:grid;grid-template-columns:42px 1fr;gap:20px;padding:24px 0;border-bottom:1px solid var(--line)}.method-list li:first-child{padding-top:0}.method-list li:before{counter-increment:steps;content:"0" counter(steps);font:italic 25px Georgia,serif;color:#94783c}.method-list h3{font:700 23px var(--serif);margin:0 0 8px}.method-list p{margin:0;color:var(--muted);font-size:14px}.faq-grid{display:grid;grid-template-columns:1fr 1.5fr;gap:70px}.faq-grid details{border-bottom:1px solid var(--line)}.faq-grid summary{list-style:none;cursor:pointer;min-height:65px;padding:19px 28px 19px 0;font-weight:600;font-size:15px;position:relative}.faq-grid summary:after{content:"＋";position:absolute;right:0;color:#82703e}.faq-grid details[open] summary:after{content:"−"}.faq-grid details p{margin:0 0 22px;font-size:14px;color:var(--muted)}.faq-grid summary::-webkit-details-marker{display:none}.closing{background:var(--green);color:var(--cream);padding:56px 0}.closing .wrap{display:flex;align-items:center;justify-content:space-between;gap:32px}.closing h2{font:700 32px/1.5 var(--serif);margin:0 0 8px}.closing p{font-size:14px;color:#c5d2bd;margin:0}.closing .actions{margin:0}.closing .btn{background:var(--cream);color:var(--green);border-color:var(--cream)}.closing .btn.secondary{background:transparent;color:var(--cream);border-color:#c8d1bd88}.site-footer{background:#132f29;color:#d2dbc8;padding:36px 0 24px}.footer-top{display:flex;justify-content:space-between;align-items:flex-start;gap:25px}.footer-brand{font:700 23px var(--serif);letter-spacing:2px}.footer-top p{font-size:12px;color:#a6b8a4;margin-top:5px}.footer-links{display:flex;gap:24px;flex-wrap:wrap;font-size:13px}.footer-links a{min-height:44px;display:flex;align-items:center}.footer-bottom{border-top:1px solid #ffffff1a;padding-top:18px;margin-top:20px;font-size:11px;color:#a6b8a4;display:flex;justify-content:space-between;gap:20px}.preview-dialog{width:min(1120px,calc(100% - 32px));padding:18px;border:1px solid var(--line);border-radius:8px;background:var(--paper);color:var(--ink);max-height:92dvh;overflow:auto}.preview-dialog::backdrop{background:#10261fcc;backdrop-filter:blur(4px)}.dialog-heading{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:12px}.dialog-heading h2{font:700 23px var(--serif);margin:0}.dialog-close{min-width:44px;min-height:44px;border:1px solid var(--line);border-radius:5px;background:transparent}.preview-dialog img{width:100%;height:auto}.preview-dialog p{font-size:13px;color:var(--muted);margin-bottom:0}.cooperation-intro{background:var(--cream);padding:70px 0}.cooperation-intro .wrap{display:grid;grid-template-columns:1.3fr 1fr;gap:72px;align-items:center}.cooperation-intro p{color:var(--muted);max-width:560px}.cooperation-mark{width:min(100%,320px);margin:auto;color:#41644c}.cooperation-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}.cooperation-card{background:#f8f3e8;border:1px solid var(--line);padding:30px;border-radius:5px}.cooperation-card h3{font:700 25px var(--serif);margin:16px 0}.cooperation-card p{color:var(--muted);font-size:14px}.contact-layout{display:grid;grid-template-columns:1.25fr 1fr;gap:80px;align-items:center}.contact-copy p{color:var(--muted);font-size:15px}.contact-card{background:var(--paper);border:1px solid var(--line);padding:30px;text-align:center;border-radius:8px}.qr-placeholder{width:208px;min-height:208px;margin:0 auto 20px;background:#f5f0e5;border:1px dashed #a9ad95;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:14px;color:#647057;padding:20px}.qr-placeholder svg{width:45px;height:45px}.qr-placeholder span{font-size:14px}.contact-card h3{font:700 24px var(--serif);margin:10px 0}.contact-card p{font-size:13px;color:var(--muted)}.contact-card img{width:220px;margin:auto}.contact-card .text-link{margin-top:10px}.contact-section{background:#eaf0e9}#qr-view{background:none;border:0;padding:0;max-width:100%}.qr-unavailable{color:#596451;font-size:13px}.noscript{padding:10px 25px;background:#eee6d3}
@media(min-width:1450px){.hero{padding-top:90px;padding-bottom:80px}}
@media(max-width:1050px){.wrap{width:calc(100% - 56px)}.header-inner{gap:18px}.site-nav{gap:18px;font-size:13px}.brand strong{font-size:23px}.brand small{font-size:8px}.hero-grid{gap:30px}.hero h1{font-size:43px}.atlas{padding:28px 22px 16px}.atlas-label{padding-left:30px;font-size:9px}.demo-copy{padding:24px}.demo-panel{grid-template-columns:1.5fr 1fr}.books-grid{gap:14px}.book{padding:25px 18px}.method-grid,.faq-grid,.contact-layout{gap:40px}}
@media(max-width:780px){html{scroll-padding-top:80px}.wrap{width:calc(100% - 40px)}.header-inner{min-height:72px;flex-wrap:wrap}.menu-toggle{display:block}.site-nav{display:none;width:100%;margin:0;padding:0 0 18px;flex-wrap:wrap;gap:8px 22px}.site-nav.is-open{display:flex}.site-nav a{min-height:44px}.site-nav .nav-account{margin:0}.hero{padding:42px 0 44px}.hero-grid{grid-template-columns:1fr;gap:36px}.hero h1{font-size:42px;margin-top:16px}.hero-lead{max-width:100%;font-size:15px}.hero-note{margin-top:22px}.atlas{width:min(100% - 14px,520px);margin:0 auto 14px;min-height:0;border-top-left-radius:85px;box-shadow:12px 12px 0 #dedbc3}.atlas-earth{aspect-ratio:1.4}.atlas-earth img{max-height:310px;width:auto;max-width:85%}.chapter-strip .wrap{justify-content:flex-start;gap:8px 20px}.chapter-strip span{font-size:12px}.section{padding:58px 0}.section-heading{display:block;margin-bottom:28px}.section-heading>p{margin-top:15px;max-width:100%}.section-heading h2,.statement h2,.cooperation-intro h1{font-size:30px}.value-grid{gap:25px;grid-template-columns:1fr}.value-item{padding-top:20px;display:grid;grid-template-columns:42px 1fr;column-gap:16px}.value-item h3{margin:0 0 10px}.value-item p{grid-column:2}.value-item .number{grid-row:1/3}.demo-header{display:block}.demo-label{display:block;margin-top:15px}.demo-tabs{gap:6px}.demo-tabs button{padding:8px 13px;font-size:13px;flex:1}.demo-panel{grid-template-columns:1fr}.demo-visual{border-right:0;border-bottom:1px solid #d5dfd1}.demo-copy{padding:25px}.demo-copy h3{margin:10px 0}.demo-question{margin:18px 0}.books-grid{grid-template-columns:repeat(2,1fr);gap:16px}.book{min-height:240px}.method-grid,.faq-grid{grid-template-columns:1fr;gap:30px}.method-intro p{max-width:100%}.closing .wrap{align-items:flex-start;flex-direction:column;gap:25px}.closing h2{font-size:29px}.footer-top,.footer-bottom{flex-direction:column;gap:14px}.footer-links{gap:6px 22px}.cooperation-intro{padding:48px 0}.cooperation-intro .wrap{grid-template-columns:1fr;gap:30px}.cooperation-mark{width:210px}.cooperation-cards{grid-template-columns:1fr;gap:16px}.cooperation-card{padding:24px}.contact-layout{grid-template-columns:1fr;gap:30px}.contact-card{padding:28px 20px}.hero .actions .btn{flex:1;white-space:nowrap}.actions{gap:10px}.preview-dialog{padding:12px}.dialog-heading h2{font-size:19px}.eyebrow{letter-spacing:2px}}
@media(max-width:380px){.hero h1{font-size:32px}.wrap{width:calc(100% - 32px)}.books-grid{gap:12px}.book{padding:20px 15px}.book h3{font-size:24px}.btn{padding:10px 18px;gap:10px}.atlas-label{letter-spacing:1px}.atlas-coord{font-size:9px}}
body[data-page=courses] .collection .section-heading{display:block;text-align:center}body[data-page=courses] .collection .section-heading>p{max-width:none;margin:12px auto 0}body[data-page=courses] .collection .section-heading h2{margin:0}body[data-page=courses] .collection .section-heading .kicker{margin-top:10px}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important}}

h1,h2,h3{text-wrap:balance}
/* LIVE HOME MODELS */
.atlas-earth.live-model:before,.atlas-earth.live-model:after{display:none}.atlas-earth.live-model{aspect-ratio:1.15;position:relative}.live-model canvas{display:block;width:100%;height:100%;outline-offset:-5px;cursor:grab}.live-model canvas:active{cursor:grabbing}.hero-model-tools{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:6px 0 16px;color:#d8dfc8;font-size:12px}.hero-model-tools button{background:transparent;border:1px solid #9aab9166;border-radius:5px;color:#f1d79b;min-height:44px;padding:7px 12px;white-space:nowrap}.hero-model-tools button:hover{background:#ffffff0b}.demo-visual.dynamic-visual{display:flex;flex-direction:column;background:#10272c;min-height:440px;overflow:hidden;position:relative}.showcase-model{position:relative;flex:1;min-height:345px;aspect-ratio:1.75}.model-corner{position:absolute;top:20px;left:22px;font-size:13px;letter-spacing:2px;color:#d8c589;pointer-events:none}.model-labels{position:absolute;inset:0;pointer-events:none;overflow:hidden}.model-labels span{position:absolute;transform:translate(-50%,-100%);padding:4px 9px;background:#132b2cdd;border:1px solid #b1bf9c44;border-radius:4px;white-space:nowrap;font-size:12px;color:#f3e6ba;text-shadow:0 1px 2px #112828}.model-loading,.model-fallback{position:absolute;inset:0;margin:0;display:flex;align-items:center;justify-content:center;padding:28px;text-align:center;font-size:14px;color:#e2e6ce;background:#102d30}.model-fallback{flex-direction:column;gap:16px}.model-fallback button{position:static!important;min-height:44px!important;color:#193f35;background:#f6ecd8!important;border:0!important;border-radius:5px!important;padding:8px 20px!important}.demo-model-bottom{padding:16px 20px 18px;border-top:1px solid #c1d0b42e;background:#10272c;color:#d9e0ca}.demo-model-bottom>p{margin:0 0 12px;font-size:13px;line-height:1.7;color:#e2d2a6;min-height:22px}.model-toolbar{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.demo-visual .model-toolbar button{position:static;min-height:44px;margin:0;background:#f1ebd9;color:#254d3d;border:1px solid #c3ccaf;padding:7px 13px;border-radius:5px;font-size:13px}.demo-visual .model-toolbar button[aria-pressed=true]{background:#d4b66e;border-color:#d4b66e}.demo-visual .model-toolbar button:hover{filter:brightness(.95)}.wind-label{font-size:12px;margin-right:3px;color:#d4dfc9}.model-gesture{display:block;margin-top:10px;font-size:11px;color:#b5c6b0}.dynamic-visual:fullscreen{width:100vw;height:100dvh;border:0;border-radius:0;display:flex;flex-direction:column}.dynamic-visual:fullscreen .showcase-model{aspect-ratio:auto;min-height:0}.dynamic-visual:fullscreen .demo-model-bottom{flex-shrink:0}.model-loading[hidden],.model-fallback[hidden]{display:none!important}.dynamic-visual .live-model:focus-within{outline:2px solid #d8bd7d;outline-offset:-3px}.demo-copy .text-link{gap:10px}.hero .atlas-label{padding-left:30px}
@media(max-width:780px){.atlas-earth.live-model{aspect-ratio:1.2;min-height:240px}.hero-model-tools{font-size:11px;gap:8px}.hero-model-tools button{font-size:12px}.showcase-model{min-height:280px;aspect-ratio:1.25}.demo-visual.dynamic-visual{min-height:0}.demo-model-bottom{padding:14px 15px 16px}.model-corner{top:15px;left:16px;font-size:12px}.model-toolbar{gap:6px}.demo-visual .model-toolbar button{font-size:12px;padding:7px 11px}.model-labels span{font-size:11px;padding:3px 6px}.demo-panel{overflow:hidden}.atlas-bottom{font-size:11px}.atlas-bottom a{white-space:nowrap}.hero .atlas-label{padding-left:18px}}
.model-stage-dialog{width:100vw;height:100dvh;max-width:none;max-height:none;margin:0;padding:0;border:0;background:#10272c;color:#f6ecd8}.model-stage-dialog::backdrop{background:#10272c}.model-stage-dialog .dynamic-visual{width:100%;height:100%;border:0;border-radius:0}.model-stage-dialog .showcase-model{aspect-ratio:auto;min-height:0}.model-stage-dialog .demo-model-bottom{flex-shrink:0;padding-bottom:max(18px,env(safe-area-inset-bottom))}

.model-toolbar button:disabled,.hero-model-tools button:disabled{opacity:.5;cursor:wait}

/* Homepage demonstrations are automatic and never capture scrolling or dragging. */
.live-model canvas{pointer-events:none;cursor:default;touch-action:auto}
.demo-visual.dynamic-visual{min-height:360px}.showcase-model{min-height:360px;aspect-ratio:1.6}
.atlas-earth.live-model{pointer-events:none}.model-loading{pointer-events:none}
@media(max-width:780px){.demo-visual.dynamic-visual{min-height:300px}.showcase-model{min-height:300px;aspect-ratio:1.15}}