:root{--line:var(--sf-line);--serif:"Songti SC","STSong","Noto Serif CJK SC",serif}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:32px}body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}a,summary{-webkit-tap-highlight-color:transparent}a:focus-visible,summary:focus-visible{outline:3px solid var(--sf-focus);outline-offset:6px}::selection{background:var(--sf-accent-soft);color:var(--ink)}h1,h2,h3,p,figure{margin:0}h1,h2,h3{font-family:var(--serif);font-weight:500}.wrap{max-width:1320px;margin:auto;padding-left:64px;padding-right:64px}.eyebrow{font-size:10px;letter-spacing:2px;font-weight:500;line-height:1.8;color:var(--muted)}.site-header{height:100px;display:flex;align-items:center;justify-content:space-between;gap:25px}.brand{display:flex;align-items:center;gap:13px;font-family:var(--serif);font-size:24px;letter-spacing:2px}.brand-mark{display:grid;place-items:center;width:43px;height:47px;border:1px solid var(--sf-accent);border-radius:2px 10px 2px 2px;font-size:28px}.brand small{display:block;font-family:system-ui,sans-serif;font-size:8px;letter-spacing:2.9px;margin-top:6px}.site-header nav{display:flex;align-items:center;gap:30px;font-size:13px}.site-header nav>a:hover,.text-link:hover{color:var(--sf-accent-hover)}.nav-entry{border:1px solid var(--sf-line);padding:12px 19px;border-radius:3px}.nav-entry span{margin-left:16px}
.hero{position:relative;background:var(--bg);color:var(--ink);isolation:isolate;overflow:hidden;max-width:1720px;margin:0 auto}.hero-image,.hero-shade{position:absolute;inset:0;width:100%;height:100%;z-index:-1}.hero-image{object-fit:cover;object-position:50% 58%}.hero-shade{background:linear-gradient(90deg,var(--bg),color-mix(in srgb,var(--bg) 95%,transparent) 22%,color-mix(in srgb,var(--bg) 78%,transparent) 42%,transparent 75%)}.hero-inner{min-height:680px;position:relative;display:flex;align-items:center;padding-top:74px;padding-bottom:112px}.hero-copy{max-width:590px}.hero .eyebrow{display:flex;align-items:center;gap:13px;color:var(--muted);margin-bottom:29px;font-size:11px}.small-line{width:28px;height:1px;background:var(--sf-accent)}h1{font-size:clamp(42px,4.3vw,62px);line-height:1.45;letter-spacing:1px;margin-bottom:27px}.hero-description{color:var(--muted);font-size:15px;line-height:2.05;letter-spacing:.4px;margin-bottom:34px}.hero-actions{display:flex;align-items:center;gap:30px}.button{display:inline-flex;justify-content:space-between;align-items:center;gap:38px;background:var(--sf-accent);color:var(--sf-on-accent);padding:18px 25px;font-size:14px;border:1px solid var(--sf-accent);border-radius:2px;transition:background .2s,transform .2s}.button:hover{background:var(--sf-accent-hover);transform:translateY(-2px)}.hero .button{background:var(--sf-accent);color:var(--sf-on-accent);border-color:var(--sf-accent)}.hero .button:hover{background:var(--sf-accent-hover)}.text-link{font-size:13px;display:inline-flex;align-items:center;gap:18px;line-height:1.8}.hero .text-link{color:var(--sf-accent)}.invite-note{color:var(--muted);font-size:10px;letter-spacing:.3px;margin-top:20px}.hero-bottom{position:absolute;bottom:29px;left:64px;right:64px;display:flex;justify-content:space-between;align-items:center;font-family:var(--serif);font-size:13px;letter-spacing:2px;color:var(--ink)}.hero-bottom small{font-family:inherit;font-size:9px;letter-spacing:1px;color:var(--muted)}
.principles{display:grid;grid-template-columns:repeat(3,1fr);padding-top:34px;padding-bottom:34px;border-bottom:1px solid var(--line);gap:38px}.principles>div{display:block;border-right:1px solid var(--line)}.principles>div:last-child{border:0}.principles strong{font-family:var(--serif);font-size:17px;font-weight:500;white-space:nowrap}.principles span{display:block;font-size:10px;line-height:1.8;color:var(--muted);margin-top:8px}.product-section{padding-top:96px;padding-bottom:88px}.section-intro{display:flex;align-items:flex-end;justify-content:space-between;gap:40px;margin-bottom:42px}.section-intro h2,.reading-copy h2,.questions h2{font-size:39px;line-height:1.5;letter-spacing:.4px;margin-top:20px}.section-intro>p{font-size:13px;color:var(--muted);line-height:2;max-width:450px;margin-bottom:7px}.product-frame{padding:14px 14px 0;background:var(--sf-soft);border:1px solid var(--sf-line);border-radius:8px;box-shadow:0 22px 48px transparent;overflow:hidden}.frame-bar{display:flex;align-items:center;justify-content:space-between;gap:16px;color:var(--muted);font-size:10px;padding:3px 10px 17px}.frame-bar>span:last-child{font-size:9px}.window-dots{letter-spacing:5px;color:var(--sf-subtle)}.product-frame img{display:block;width:100%;height:auto;border:1px solid var(--sf-line);border-radius:3px}.product-frame figcaption{color:var(--muted);text-align:center;font-size:10px;padding:15px;line-height:1.8}.feature-points{display:grid;grid-template-columns:repeat(3,1fr);gap:50px;margin-top:45px}.feature-points>div{position:relative;padding-left:35px}.feature-points>div>span{position:absolute;left:0;top:5px;font-family:Georgia,serif;font-size:13px;color:var(--sf-subtle)}.feature-points h3{font-size:22px;margin-bottom:12px}.feature-points p{font-size:12px;line-height:1.9;color:var(--muted)}
.author-note{background:var(--sf-soft);color:var(--ink)}.author-inner{display:grid;grid-template-columns:1fr .8fr;align-items:center;gap:100px;padding-top:60px;padding-bottom:60px}.author-note .eyebrow{color:var(--muted)}.author-note h2{font-size:32px;line-height:1.6;margin-top:15px}.author-details>p{font-size:13px;line-height:2.1;color:var(--muted);margin-bottom:26px}.light-link{display:inline-flex;gap:32px;font-size:12px;padding-bottom:10px;border-bottom:1px solid var(--sf-line)}.library{padding-top:96px;padding-bottom:90px}.reading-intro{display:grid;grid-template-columns:1.1fr 1fr;gap:70px;align-items:center;margin-bottom:40px}.reading-visual{position:relative;overflow:hidden;background:var(--sf-soft)}.reading-visual img{display:block;width:100%;height:auto;aspect-ratio:1.15;object-fit:cover;object-position:45% 50%}.reading-visual figcaption{position:absolute;bottom:18px;left:22px;color:#FFFFFF;font-size:9px;letter-spacing:1px;text-shadow:0 1px 5px #000}.reading-copy>p:not(.eyebrow){font-size:13px;line-height:2.1;color:var(--muted);margin:24px 0 30px}.reading-copy>.text-link{border-bottom:1px solid var(--sf-accent);padding-bottom:8px}.library-empty{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:26px 0;display:flex;align-items:center;justify-content:space-between;gap:35px}.library-empty h3{font-size:20px;margin-bottom:9px}.library-empty p{font-size:12px;color:var(--muted);line-height:1.9;max-width:700px}.library-empty>a{flex-shrink:0}.home-story-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}.home-story{padding:30px;min-height:270px;border-top:2px solid var(--sf-accent);background:var(--sf-panel);display:flex;flex-direction:column;overflow-wrap:anywhere}.home-story:hover{background:var(--sf-hover)}.home-story .eyebrow{font-size:9px}.home-story h3{font-size:25px;line-height:1.5;margin:17px 0 12px}.home-story p{font-size:13px;line-height:1.9;color:var(--muted)}.story-byline{font-size:11px;margin-bottom:14px}.story-bottom{font-size:11px;margin-top:auto;padding-top:20px;display:flex;justify-content:space-between}
.questions{display:grid;grid-template-columns:1fr 1.4fr;gap:70px;padding-top:10px;padding-bottom:85px}.questions h2{font-size:32px}.question-list{border-top:1px solid var(--line)}.question-list details{border-bottom:1px solid var(--line)}.question-list summary{list-style:none;cursor:pointer;display:flex;gap:25px;justify-content:space-between;align-items:center;font-size:14px;padding:22px 0;line-height:1.7}.question-list summary::-webkit-details-marker{display:none}.question-list summary span{font-size:18px;color:var(--sf-subtle)}.question-list details[open] summary span{transform:rotate(45deg)}.question-list p{font-size:12px;color:var(--muted);line-height:2;padding:0 32px 24px 0}.closing{text-align:center;padding-top:60px;padding-bottom:76px;position:relative}.closing:before{content:"";height:1px;position:absolute;top:0;left:64px;right:64px;background:var(--line)}.closing h2{font-size:40px;line-height:1.6;margin:20px 0 30px}.closing>p:last-child{font-size:11px;color:var(--muted);margin-top:20px}.site-footer{display:flex;align-items:center;gap:24px;padding-top:30px;padding-bottom:35px;font-size:10px;color:var(--muted)}.footer-brand{font-family:var(--serif);font-size:16px;color:var(--ink)}.footer-brand span{font-family:system-ui,sans-serif;font-size:8px;letter-spacing:1.7px;margin-left:12px}.site-footer p{margin-right:auto}.skip-link{position:fixed;left:20px;top:-100px;padding:15px;background:var(--ink);color:white;z-index:100}.skip-link:focus{top:15px}
@media(min-width:1600px){.hero-inner{min-height:760px}}
@media(max-width:1100px){.wrap{padding-left:36px;padding-right:36px}.site-header nav{gap:22px}.hero-inner{min-height:650px}.hero-bottom{left:36px;right:36px}.hero-shade{background:linear-gradient(90deg,var(--bg),color-mix(in srgb,var(--bg) 95%,transparent) 22%,color-mix(in srgb,var(--bg) 78%,transparent) 42%,transparent 75%)}.principles{gap:22px}.principles>div{display:block}.principles span{display:block;max-width:none;margin-top:7px}.section-intro>p{max-width:350px}.feature-points{gap:27px}.author-inner{gap:65px}.reading-intro{gap:42px}.reading-copy h2{font-size:33px}.questions{gap:40px}.closing:before{left:36px;right:36px}.site-footer p{display:none}.footer-brand{margin-right:auto}}
@media(max-width:760px){.site-header{height:86px}.process-link{display:none}.hero-image{object-position:73% 50%;opacity:.8}.hero-shade{background:linear-gradient(90deg,var(--bg),color-mix(in srgb,var(--bg) 95%,transparent) 22%,color-mix(in srgb,var(--bg) 78%,transparent) 42%,transparent 75%)}.hero-inner{min-height:680px;padding-top:70px;padding-bottom:116px}.hero-copy{max-width:520px}.hero h1{font-size:52px}.hero-bottom{font-size:11px;letter-spacing:1px}.principles{gap:20px;padding-top:27px;padding-bottom:27px}.principles strong{font-size:15px;white-space:normal}.principles span{font-size:9px}.section-intro{display:block;margin-bottom:30px}.section-intro h2{font-size:34px;margin-top:15px}.section-intro>p{margin-top:20px;max-width:none}.section-intro>p br{display:none}.product-section{padding-top:65px;padding-bottom:60px}.product-frame{padding:9px 9px 0;border-radius:5px}.frame-bar{font-size:8px;padding:3px 3px 13px}.frame-bar>span:last-child{font-size:8px}.window-dots{display:none}.product-frame figcaption{font-size:9px;padding:11px}.feature-points{grid-template-columns:1fr;gap:25px;margin-top:33px}.feature-points h3{font-size:21px;margin-bottom:7px}.feature-points>div{padding-left:38px}.author-inner{grid-template-columns:1fr;gap:25px;padding-top:42px;padding-bottom:42px}.author-note h2{font-size:30px}.author-details>p{margin-bottom:22px;max-width:510px}.reading-intro{grid-template-columns:1fr;gap:35px}.reading-visual img{aspect-ratio:1.5}.library{padding-top:60px;padding-bottom:60px}.reading-copy h2{font-size:34px;margin-top:16px}.reading-copy>p:not(.eyebrow){margin:20px 0 23px}.library-empty{align-items:flex-start;flex-direction:column;gap:18px;padding:25px 0}.library-empty h3{font-size:19px}.home-story-grid{grid-template-columns:1fr}.questions{grid-template-columns:1fr;gap:30px;padding-bottom:55px}.questions h2{font-size:30px}.questions h2 br{display:none}.question-list summary{font-size:13px}.closing{padding-top:45px;padding-bottom:50px}.closing h2{font-size:34px}.site-footer{flex-wrap:wrap;justify-content:center;gap:20px}.footer-brand{margin:0;width:100%;text-align:center}}
@media(max-width:480px){.wrap{padding-left:23px;padding-right:23px}.site-header{height:80px;gap:12px}.brand{gap:9px;font-size:19px;letter-spacing:1px}.brand-mark{width:32px;height:36px;font-size:23px}.brand small{font-size:6px;letter-spacing:2px}.site-header nav{gap:13px;font-size:11px}.nav-entry{border:0;padding:7px 0}.nav-entry span{display:none}.hero-inner{min-height:650px;padding-top:64px;padding-bottom:105px;align-items:flex-start}.hero-image{object-position:72% 50%;opacity:.75}.hero-shade{background:linear-gradient(90deg,var(--bg),color-mix(in srgb,var(--bg) 95%,transparent) 22%,color-mix(in srgb,var(--bg) 78%,transparent) 42%,transparent 75%)}.hero .eyebrow{font-size:9px;letter-spacing:1.7px;margin-bottom:24px}.hero h1{font-size:38px;line-height:1.5;letter-spacing:0;margin-bottom:23px}.hero-description{font-size:12px;line-height:2.1;margin-bottom:29px}.hero-actions{gap:23px}.hero-actions .button{padding:16px 20px;gap:24px;font-size:13px}.hero-actions .text-link{font-size:11px;gap:10px}.invite-note{font-size:9px;letter-spacing:0;line-height:1.9;margin-top:17px}.hero-bottom{left:23px;right:23px;bottom:22px;align-items:flex-start;gap:16px}.hero-bottom>span{font-size:10px;letter-spacing:0}.hero-bottom small{font-size:8px;letter-spacing:0}.principles{gap:14px;padding-top:24px;padding-bottom:24px}.principles>div{padding-right:11px}.principles strong{font-size:14px;line-height:1.7;display:block}.principles span{font-size:9px;line-height:1.8}.product-section{padding-top:50px;padding-bottom:48px}.section-intro h2{font-size:30px}.section-intro>p{font-size:12px}.eyebrow{font-size:9px;letter-spacing:1.6px}.frame-bar{font-size:7px;gap:6px}.frame-bar>span:last-child{font-size:7px}.product-frame figcaption{font-size:8px;padding:10px 2px}.feature-points h3{font-size:20px}.feature-points p{font-size:12px}.author-note h2{font-size:28px}.author-details>p{font-size:12px}.library{padding-top:48px;padding-bottom:48px}.reading-visual{margin-left:-23px;margin-right:-23px}.reading-visual img{aspect-ratio:1.25}.reading-copy h2{font-size:31px}.reading-copy>p:not(.eyebrow){font-size:12px}.library-empty p{font-size:11px}.questions h2{font-size:29px}.closing:before{left:23px;right:23px}.closing h2{font-size:30px}.closing>p:last-child{font-size:10px;line-height:1.9;max-width:275px;margin:18px auto 0}.site-footer{padding-top:23px;padding-bottom:30px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.button{transition:none}.button:hover{transform:none}}

.product-frame figcaption a{margin-left:14px;text-decoration:underline;text-underline-offset:3px;color:var(--ink)}
@media(max-width:360px){.hero-actions{gap:14px}.hero-actions .button{gap:20px;padding-left:18px;padding-right:18px}.hero-actions .text-link{gap:8px}}

.hero-bottom small{background:var(--sf-panel);color:var(--muted);padding:5px 8px;border-radius:2px}.product-frame{box-shadow:var(--sf-shadow)}
@media(max-width:760px){.hero-shade{background:linear-gradient(180deg,var(--bg),color-mix(in srgb,var(--bg) 94%,transparent) 40%,color-mix(in srgb,var(--bg) 60%,transparent) 70%,transparent)}}