:root{--ink:#142c3a;--text:#344a57;--muted:#64737b;--paper:#fff;--wash:#f3f6f7;--line:#d9e1e4;--accent:#21665d;--accent-light:#d8eee7;--serif:Georgia,"Noto Serif TC","Songti TC","PMingLiU",serif;--sans:Inter,-apple-system,BlinkMacSystemFont,"PingFang TC","Microsoft JhengHei",sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.8;background:var(--paper);-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button:disabled{cursor:not-allowed}button:disabled.button{opacity:.7}button:disabled.text-link{opacity:.65}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid #b97928;outline-offset:5px}p,h1,h2,h3{margin:0}h1,h2,h3{text-wrap:balance}p{overflow-wrap:break-word}svg{max-width:100%}.container{width:min(1184px,calc(100% - 64px));margin-inline:auto}.site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line)}.nav-inner{display:flex;align-items:center;justify-content:space-between;min-height:88px;gap:28px}.wordmark{font-family:var(--serif);font-size:34px;line-height:1;display:inline-flex;align-items:center;gap:18px;letter-spacing:-1px}.wordmark-line{height:25px;width:1px;background:var(--line)}.wordmark-caption{font-family:var(--sans);font-size:13px;letter-spacing:.08em}.site-header nav{display:flex;gap:27px;font-size:14px}.site-header nav a:hover{color:var(--accent)}.button{display:inline-flex;justify-content:center;align-items:center;gap:26px;border:1px solid var(--ink);background:var(--ink);color:white;font-weight:600;min-height:54px;padding:12px 24px;font-size:16px;border-radius:4px;cursor:pointer;transition:background .15s}.button:hover:not(:disabled){background:var(--accent);border-color:var(--accent)}.button-small{min-height:44px;font-size:14px;padding:9px 16px;gap:18px}.text-link{display:inline-flex;align-items:center;gap:16px;border:0;border-bottom:1px solid var(--line);background:none;padding:9px 0;font-size:15px;font-weight:500;cursor:pointer}.text-link:hover{color:var(--accent)}.hero{display:grid;grid-template-columns:1.2fr 1fr;gap:90px;align-items:center;padding-block:78px 80px}.eyebrow{font-size:13px;letter-spacing:.07em;font-weight:600;color:var(--accent);margin-bottom:24px}h1{font-family:var(--serif);font-weight:500;font-size:clamp(40px,4.1vw,60px);line-height:1.35;letter-spacing:.01em}h1 span{color:var(--accent)}.hero-audience{margin-top:22px;color:var(--muted);font-size:15px}.credentials{font-size:15px;margin-top:27px;font-weight:600}.hero-intro{font-size:16px;margin-top:12px;line-height:1.9;color:var(--text);max-width:550px}.hero-actions{display:flex;align-items:center;gap:27px;margin-top:29px}.microcopy{color:var(--muted);font-size:13px;margin-top:12px}.contact-pending{font-size:13px;color:var(--muted);margin-top:4px}.hero-note{align-self:stretch;margin-top:5px;min-height:550px;background:var(--ink);color:white;padding:32px 36px 22px;position:relative;display:flex;flex-direction:column;border-radius:4px}.note-top{display:flex;justify-content:space-between;gap:8px;font-size:13px;color:#c2d3d8;letter-spacing:.08em}.mono{font-family:monospace;font-size:12px}.note-question{font-family:var(--serif);font-size:30px;line-height:1.6;letter-spacing:.04em;margin-top:34px}.note-rule{height:1px;background:#48606d;margin-top:28px}.note-label{font-size:13px;color:#b4cdc8;margin-top:23px}.note-steps{list-style:none;padding:0;margin:17px 0 25px;display:grid;gap:15px}.note-steps li{display:flex;gap:20px}.note-steps li>span{font:12px/2.2 monospace;color:#91bcb4}.note-steps li>div{font-family:var(--serif);font-size:23px;line-height:1.2}.note-steps small{font-family:var(--sans);font-size:13px;display:block;line-height:1.8;color:#c0cdd2;margin-top:5px}.note-bottom{font-size:12px;color:#b9cdd3;margin-top:auto;border-top:1px solid #48606d;padding-top:17px}.subject-band{border-block:1px solid var(--line)}.subject-band>.container{display:grid;grid-template-columns:repeat(3,1fr)}.subject-band span{padding:23px 0;text-align:center;font-size:18px}.subject-band span+span{border-left:1px solid var(--line)}.subject-band b{font:12px monospace;color:var(--accent);margin-right:16px}.site-footer{padding-block:45px;display:flex;justify-content:space-between;gap:20px;border-top:1px solid var(--line)}.site-footer p{font-size:13px;color:var(--muted);margin-top:12px}.site-footer small{display:block;text-align:right;font-size:12px;color:var(--muted);margin-top:20px}.skip-link{position:fixed;left:10px;top:-100px;padding:10px 20px;background:white;z-index:100}.skip-link:focus{top:10px}@media(min-width:1500px){.hero{padding-block:95px}}@media(max-width:1050px){.site-header nav{gap:16px}.wordmark-caption,.wordmark-line{display:none}.hero{gap:40px}.hero-note{padding:28px}.container{width:calc(100% - 48px)}}@media(max-width:760px){html{scroll-padding-top:90px}.container{width:calc(100% - 40px)}.nav-inner{min-height:72px}.site-header nav{display:none}.wordmark{font-size:31px}.wordmark-caption,.wordmark-line{display:block}.wordmark-caption{font-size:12px}.wordmark{gap:12px}.button-small{font-size:14px;padding:8px 12px;gap:10px}.hero{grid-template-columns:1fr;padding-block:40px 40px;gap:36px}.eyebrow{font-size:12px;letter-spacing:0;margin-bottom:23px}h1{font-size:clamp(34px,8.4vw,48px);line-height:1.42}.hero-audience{font-size:14px;margin-top:20px}.credentials{font-size:14px;margin-top:24px}.hero-intro{font-size:16px}.hero-actions{gap:23px;flex-wrap:wrap;margin-top:25px}.hero-note{min-height:0;padding:26px}.note-question{font-size:28px;margin-top:25px}.note-steps{grid-template-columns:1fr;gap:18px}.subject-band span{font-size:13px;padding:18px 3px}.subject-band b{display:block;margin:0 0 5px}.site-footer{flex-direction:column}.site-footer small{text-align:left}.hero-actions .button{padding-inline:20px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition:none!important}}
.section{padding-block:96px}.section-index{font-family:var(--sans);font-size:12px;font-weight:600;letter-spacing:.12em;color:var(--accent);margin-bottom:19px}h2{font-family:var(--serif);font-size:clamp(30px,3vw,40px);font-weight:500;line-height:1.55;letter-spacing:.02em}.section-heading{margin-bottom:43px}.section-heading>p:last-child:not(.section-index){color:var(--muted);font-size:16px;margin-top:20px;max-width:760px}.fit-grid{display:grid;grid-template-columns:1.15fr 1fr;gap:32px}.fit-panel{border-top:2px solid var(--accent);padding:27px 30px;background:var(--wash);border-radius:0 0 4px 4px}.fit-panel h3{font-size:18px;font-weight:600}.fit-consider{background:white;border-top-color:var(--line);padding-inline:23px}.clean-list{margin:23px 0 0;padding:0;list-style:none;display:grid;gap:17px;color:var(--text)}.clean-list li{padding-left:23px;position:relative;line-height:1.9}.clean-list li:before{content:'—';position:absolute;left:0;color:var(--accent)}.fit-consider li:before{color:var(--muted)}.about-section{background:var(--wash);padding-block:88px}.about-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:88px;align-items:center}.portrait-placeholder{aspect-ratio:4/5;min-width:0;background:#e5ebee;display:flex;flex-direction:column;align-items:center;justify-content:center;border:1px solid #d9e3e7;position:relative;border-radius:3px}.portrait-wordmark{font-family:var(--serif);font-size:110px;font-weight:400;color:#879ca8;letter-spacing:-6px}.portrait-caption{font-size:13px;color:#516875;letter-spacing:.12em;position:absolute;bottom:25px}.portrait-photo{width:100%;height:auto;aspect-ratio:4/5;object-fit:cover;object-position:center 42%;border-radius:3px}.about-copy>p:not(.section-index){margin-top:22px;color:var(--text);font-size:16px;line-height:1.9}.background-list{list-style:none;padding:22px 0 0;margin:27px 0 0;border-top:1px solid #cdd8dd;display:grid;grid-template-columns:1fr 1fr;gap:12px 20px;font-size:14px}.background-list li:before{content:'·';margin-right:9px;color:var(--accent)}.method-flow{list-style:none;padding:0;display:grid;grid-template-columns:repeat(5,1fr);margin:0 0 45px;border-block:1px solid var(--line)}.method-flow li{padding:23px 0 26px 24px;position:relative}.method-flow li:first-child{padding-left:0}.method-flow li+li{border-left:1px solid var(--line)}.method-flow li+li:before{content:'→';position:absolute;left:-9px;top:54px;background:white;color:var(--muted);font-size:16px}.method-flow span,.method-flow small{display:block;color:var(--muted);font-size:13px}.method-flow span{font-family:monospace;font-size:12px;color:var(--accent)}.method-flow strong{display:block;font-family:var(--serif);font-weight:400;font-size:25px;margin:6px 0 2px}.method-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:40px}.method-number{font:12px monospace;color:var(--accent);display:block;margin-bottom:16px}.method-grid h3{font-size:20px;font-weight:600}.method-english{font-size:13px;color:var(--accent);margin:7px 0 16px;line-height:1.7;min-height:23px}.method-grid article>p:last-child{font-size:15px;color:var(--text);line-height:1.9}.visual-example{margin:48px 0 0;padding:36px;background:var(--wash);border:1px solid var(--line);display:grid;grid-template-columns:.8fr 1.2fr;gap:50px;align-items:center;border-radius:4px}.visual-example h3{font-family:var(--serif);font-weight:400;font-size:25px;line-height:1.5}.visual-example p:not(.section-index){font-size:15px;color:var(--text);margin-top:15px}.visual-example figcaption{font-size:12px;color:var(--muted);margin-top:14px}.demo-section{background:var(--wash)}.demo-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.demo-card{background:white;border:1px solid var(--line);border-radius:5px;overflow:hidden}.demo-media{aspect-ratio:16/11;position:relative;background:#eaf0f2}.demo-poster{height:100%;position:relative;padding:20px 20px 14px;display:flex;flex-direction:column;justify-content:space-between}.poster-label{font-size:12px;letter-spacing:.06em;color:#49626e}.demo-poster svg{width:100%;flex:1;min-height:0}.poster-status{font-size:12px;align-self:flex-start;background:#fff9;padding:2px 10px;border:1px solid #d2dee1;border-radius:3px;z-index:1}.demo-body{padding:23px 23px 22px}.subject-label{font:12px var(--sans);letter-spacing:.07em;color:var(--accent);font-weight:600}.demo-body h3{font-family:var(--serif);font-size:23px;font-weight:400;margin:9px 0 13px;line-height:1.4}.demo-body>p{font-size:15px;color:var(--text)}.demo-body .demo-availability{font-size:12px;margin-top:21px;color:var(--muted);padding-top:14px;border-top:1px solid var(--line)}.demo-play{position:absolute;z-index:2;left:50%;top:50%;transform:translate(-50%,-50%);white-space:nowrap;background:var(--ink);border:1px solid var(--ink);border-radius:4px;color:white;padding:14px;font-size:14px;cursor:pointer}.demo-play:hover{background:var(--accent)}.video-poster-image{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:1}.demo-media iframe,.demo-media video{width:100%;height:100%;border:0;background:var(--ink);display:block}.subject-rows article{display:grid;grid-template-columns:48px .85fr 1.35fr;align-items:start;gap:25px;border-top:1px solid var(--line);padding:31px 0}.subject-rows article:last-child{border-bottom:1px solid var(--line)}.row-number{font:13px/2.5 monospace;color:var(--accent)}.subject-rows h3{font-family:var(--serif);font-size:28px;font-weight:400;line-height:1.5}.subject-rows p{font-size:16px;color:var(--text);line-height:1.9}.diagnostic-section{background:var(--ink);color:white}.diagnostic-grid{display:grid;grid-template-columns:1fr 1fr;gap:100px;align-items:center}.diagnostic-section .section-index{color:#a6ccc2}.diagnostic-section h2{font-size:38px}.diagnostic-lead{font-family:var(--serif);font-size:29px;line-height:1.5;margin-top:30px;color:#c4e3d9}.diagnostic-lead strong{font-size:22px;font-family:var(--sans);font-weight:500}.diagnostic-lead+p{color:#cad7dc;margin-top:20px;font-size:15px}.diagnostic-note{font-size:13px;color:#b2c5cd;margin-top:10px}.button-light{background:white;color:var(--ink);border-color:white;margin-top:27px}.button-light:hover{color:white}.start-steps{list-style:none;margin:0;padding:0;display:grid;gap:30px}.start-steps li{display:flex;gap:23px;padding-top:25px;border-top:1px solid #49606c}.start-steps li>span{font:13px/2 monospace;color:#a6ccc2}.start-steps h3{font-size:19px;font-weight:500}.start-steps p{margin-top:11px;color:#c2d1d8;font-size:15px}.faq-section{display:grid;grid-template-columns:.8fr 1.2fr;gap:65px}.faq-list{border-top:1px solid var(--line)}.faq-list details{border-bottom:1px solid var(--line)}.faq-list summary{display:flex;justify-content:space-between;gap:20px;padding:24px 0;cursor:pointer;list-style:none;font-size:16px;font-weight:500}.faq-list summary::-webkit-details-marker{display:none}.faq-list summary>span{color:var(--accent);font-size:22px;font-weight:300;line-height:1.3;flex:none}.faq-list details[open] summary>span{transform:rotate(45deg)}.faq-list details>p{margin:0 30px 25px 0;font-size:15px;color:var(--text);line-height:1.9}.final-section{padding:35px 0 90px;text-align:center}.final-section h2{font-size:36px}.final-section>p:not(.section-index){color:var(--muted);margin:20px 0 27px}.final-section .button{min-width:208px}
@media(max-width:1050px){.about-grid{gap:45px}.method-grid{gap:25px}.method-flow strong{font-size:22px}.visual-example{gap:25px;padding:27px}.demo-grid{gap:16px}.demo-body{padding:20px 17px}.demo-body h3{font-size:21px}.diagnostic-grid{gap:50px}.faq-section{gap:40px}.background-list{grid-template-columns:1fr}.subject-rows article{grid-template-columns:25px .8fr 1.2fr}}
@media(max-width:760px){.section{padding-block:58px}.section-index{font-size:12px;margin-bottom:16px}h2{font-size:30px;line-height:1.55}.section-heading{margin-bottom:29px}.section-heading>p:last-child:not(.section-index){font-size:15px}.fit-grid{grid-template-columns:1fr;gap:25px}.fit-panel{padding:24px 22px}.fit-consider{padding-inline:0}.clean-list{font-size:15px;gap:15px}.about-section{padding-block:54px}.about-grid{grid-template-columns:1fr;gap:32px}.portrait-placeholder,.portrait-photo{width:min(100%,340px);justify-self:center;aspect-ratio:4/4.5}.about-copy>p:not(.section-index){font-size:16px}.background-list{font-size:15px;grid-template-columns:1fr}.method-flow{grid-template-columns:1fr;margin-bottom:33px}.method-flow li,.method-flow li:first-child{display:grid;grid-template-columns:28px 1fr 80px;gap:10px;align-items:center;padding:14px 0}.method-flow li+li{border-left:0;border-top:1px solid var(--line)}.method-flow li+li:before{display:none}.method-flow strong{font-size:24px;margin:0}.method-flow small{text-align:right}.method-grid{grid-template-columns:1fr;gap:30px}.method-grid article{border-bottom:1px solid var(--line);padding-bottom:25px}.method-number{margin-bottom:9px}.method-grid article>p:last-child{font-size:16px}.method-english{margin-bottom:12px}.visual-example{grid-template-columns:1fr;margin-top:30px;gap:20px;padding:23px 19px}.visual-example svg{width:100%;height:auto}.visual-example h3 br{display:none}.visual-example h3{font-size:24px}.demo-grid{grid-template-columns:1fr;gap:24px}.demo-media{aspect-ratio:16/10}.demo-poster{padding:18px 22px}.demo-body{padding:24px}.demo-body h3{font-size:25px}.demo-body>p{font-size:16px}.subject-rows article{grid-template-columns:27px 1fr;gap:10px;padding-block:25px}.subject-rows h3{font-size:27px}.subject-rows p{grid-column:2}.diagnostic-grid{grid-template-columns:1fr;gap:40px}.diagnostic-section h2{font-size:32px}.start-steps p,.diagnostic-lead+p{font-size:16px}.start-steps{gap:25px}.faq-section{grid-template-columns:1fr;gap:30px}.faq-list summary{padding-block:21px}.faq-list details>p{margin-right:10px;font-size:16px}.final-section{padding-block:15px 58px}.final-section h2{font-size:30px}.final-section>p:not(.section-index){font-size:15px}.site-footer{padding-block:35px}.portrait-wordmark{font-size:100px}}
@media(max-width:360px){.container{width:calc(100% - 32px)}.wordmark-caption,.wordmark-line{display:none}.hero-actions{gap:13px}.hero-actions .button{padding-inline:15px}.text-link{font-size:14px}.eyebrow{font-size:12px}.subject-band span{font-size:12px}.demo-body{padding:19px}.method-flow li{grid-template-columns:22px 1fr 70px}.method-flow strong{font-size:22px}}

/* Reading text stays comfortable across desktop and mobile. */
.clean-list,.method-grid article>p:last-child,.visual-example p:not(.section-index),.demo-body>p,.start-steps p,.diagnostic-lead+p,.faq-list details>p{font-size:16px}

/* Portrait framing preserves the face, hands, and book in the supplied photograph. */
.portrait-photo{aspect-ratio:3/5;object-position:center 50%;max-width:420px;justify-self:center}
@media(max-width:760px){.portrait-photo{aspect-ratio:3/5;max-width:340px}}
