*{box-sizing:border-box}
html{scroll-behavior:smooth}
html,body{background:var(--bg)}
body{margin:0;color:var(--sub);font-family:"Noto Sans TC","Microsoft JhengHei","PingFang TC",system-ui,-apple-system,sans-serif;font-size:17px;line-height:1.85;-webkit-font-smoothing:antialiased}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

/* single scrolling page: #anchor targets need breathing room so the sticky
   nav doesn't cover the section heading when jumped to */
#top,.sec{scroll-margin-top:84px}
@media(max-width:800px){#top,.sec{scroll-margin-top:130px}}

body{background-color:var(--bg)}

/* nav */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;min-height:64px;padding-top:10px;padding-bottom:10px;gap:12px 24px;max-width:1400px}
.nav-left{display:flex;align-items:center;gap:14px}
.brand{display:inline-flex;align-items:center;text-decoration:none}
.brand-logo{height:68px;width:auto;display:block;flex:none}
.brand span{color:var(--muted);font-weight:400;font-size:14px;margin-left:8px}
.navlinks{display:flex;flex-wrap:wrap;gap:10px 22px;align-items:center;justify-content:flex-end}
.navlinks a{color:var(--sub);text-decoration:none;font-size:15px;padding:6px 0;border-bottom:2px solid transparent;white-space:nowrap;transition:color .15s,border-color .15s}
.navlinks a:hover{color:var(--ink);border-bottom-color:var(--accent)}
.navcta{background:var(--accent);color:#fff !important;padding:9px 20px !important;border-radius:8px;font-weight:600;border-bottom:none !important;white-space:nowrap;box-shadow:0 4px 14px var(--accent-shadow)}
.navcta:hover{background:var(--accent-hover)}
.lang-toggle{background:transparent;border:1px solid var(--line);color:var(--sub);border-radius:999px;padding:6px 14px;font-size:13px;font-weight:600;letter-spacing:.04em;cursor:pointer;display:inline-flex;gap:6px;align-items:center;white-space:nowrap;transition:border-color .15s}
.lang-toggle:hover{border-color:var(--accent)}
.lang-toggle span{opacity:.55;transition:opacity .15s,color .15s}
.lang-toggle span.active{opacity:1;color:var(--accent)}

/* hamburger menu — hidden on desktop, where .nav-links-list participates
   directly in the .navlinks flex row via display:contents */
.nav-links-list{display:contents}
.nav-toggle{display:none;flex:none;width:38px;height:38px;border:1px solid var(--line);border-radius:6px;
  background:transparent;cursor:pointer;align-items:center;justify-content:center;flex-direction:column;gap:5px;padding:0;transition:border-color .15s}
.nav-toggle:hover,.nav-toggle:focus-visible{border-color:var(--accent)}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;transition:transform .2s,opacity .2s}
.nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* hero */
.hero{position:relative;overflow:hidden;background:var(--bg);color:var(--ink);padding:92px 0 100px;min-height:560px;display:flex;align-items:center}
.hero .wrap{position:relative;z-index:2;width:100%}
.hero-copy{max-width:600px}
.hero h1{font-size:clamp(38px,5.5vw,72px);line-height:1.04;margin:0 0 26px;font-weight:700;letter-spacing:-.02em;color:var(--ink)}
.hero p{font-size:clamp(16px,1.5vw,18.5px);color:var(--sub);margin:0 0 14px;max-width:520px}
.hero strong{font-weight:700;color:var(--accent)}
.herocta{margin-top:36px;display:flex;gap:14px;flex-wrap:wrap}
/* the hero illustration was composed as a full-bleed graphic (built-in empty
   space on its own left side, subject cluster on the right) — so it bleeds
   to the real browser edge and fills the hero's full height, rather than
   sitting boxed in a grid column where that same empty space just reads as
   dead whitespace on top of the column's own padding */
.hero-art{position:absolute;top:0;right:0;bottom:0;width:52%;max-width:920px;z-index:1;pointer-events:none;
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 12%);mask-image:linear-gradient(90deg,transparent,#000 12%)}
.hero-art img{width:100%;height:100%;display:block;object-fit:cover;object-position:right center}

.btn{display:inline-block;padding:14px 30px;border-radius:8px;text-decoration:none;font-weight:700;font-size:16px;transition:background .15s,border-color .15s,box-shadow .15s;border:none;cursor:pointer}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 4px 16px var(--accent-shadow)}
.btn-primary:hover{background:var(--accent-hover);box-shadow:0 6px 20px var(--accent-shadow)}
.btn-ghost{background:transparent;color:var(--ink);border:1px solid var(--line)}
.btn-ghost:hover{border-color:var(--accent)}

/* sections */
main{counter-reset:secnum}
.sec{padding:128px 0;position:relative;overflow:hidden;background:var(--bg);counter-increment:secnum}
.sec+.sec{border-top:1px solid var(--line)}
.sec-alt{background:var(--bg-alt)}
.sec>.wrap{position:relative;z-index:1}

/* service card */
.svc{background:var(--panel);border-radius:8px;padding:32px;margin:0 0 26px;position:relative;
  box-shadow:0 10px 30px rgba(16,35,63,.07);transition:box-shadow .2s,transform .2s}
.svc:hover{box-shadow:0 16px 40px rgba(16,35,63,.10);transform:translateY(-2px)}
.svc-head{display:flex;align-items:flex-start;gap:18px;margin-bottom:6px}
.svc-ico{flex:none;width:56px;height:56px;border-radius:10px;background:var(--panel-2);
  display:flex;align-items:center;justify-content:center;color:var(--accent);box-shadow:0 2px 8px rgba(16,35,63,.06)}
.svc-ico svg{width:30px;height:30px}
.svc h3{font-size:clamp(20px,2.1vw,25px);
  line-height:1.4;margin:4px 0 0;font-weight:700;color:var(--ink)}

/* case-study callouts */
.callout{background:var(--panel-2);border-left:2px solid var(--accent);border-radius:8px;
  padding:22px 28px;margin:18px 0;position:relative;box-shadow:0 2px 10px rgba(16,35,63,.05)}
.callout p{margin:8px 0;color:var(--sub)}
.callout p:first-child{margin-top:0;font-weight:600;color:var(--ink)}
.callout p:last-child{margin-bottom:0}

.pullquote{font-weight:700;font-size:clamp(19px,2.2vw,25px);
  line-height:1.5;color:var(--ink);border-left:1px solid var(--line);padding:4px 0 4px 24px;margin:30px 0}

/* evidence-style stat rows (echoes the reference site's "02 / Evidence" section) */
.evidence{margin:24px 0;display:grid;gap:16px}
.evidence-row{display:grid;grid-template-columns:120px 1fr;gap:24px;padding:28px;align-items:start;
  background:rgba(255,255,255,.04);border:1px solid var(--dark-line);border-radius:8px;
  box-shadow:0 8px 24px rgba(0,0,0,.18)}
.evidence-row:nth-child(1){border-left:3px solid var(--tag-purple)}
.evidence-row:nth-child(2){border-left:3px solid var(--tag-teal)}
.evidence-row:nth-child(3){border-left:3px solid var(--tag-green)}
.evidence-num{font-size:clamp(40px,5vw,64px);font-weight:800;line-height:1;color:var(--ink)}
.evidence-body{padding-top:6px}
.evidence-lead{margin:0 0 6px;font-weight:700;color:var(--ink);font-size:17px}
.evidence-sub{margin:0;color:var(--sub)}

/* "01" pairs a compact photo (left, flat/untilted — kept deliberately plain
   so it doesn't repeat "03"'s tilted-photo device) with a hairline-divided
   symptoms list (right), then a standalone dark reveal line below */
.why-row{display:grid;grid-template-columns:minmax(200px,280px) minmax(0,1fr);gap:40px;margin:28px 0}
.why-art{align-self:stretch}
.why-art .sec-image,.why-art .img-placeholder{width:100%;height:100%;margin:0;border-radius:10px}
.why-art .sec-image{object-fit:cover}
.why-symptoms{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}
.why-symptoms li{margin:0;padding:18px 2px;border-bottom:1px solid var(--line);color:var(--sub)}
.why-symptoms li:before{display:none}
.why-note{margin:0;background:var(--ink);color:var(--dark-ink);padding:28px 32px;
  font-weight:700;line-height:1.4;
  font-size:clamp(18px,2.2vw,26px);border-radius:8px}

/* "05" closing CTA: copy + button left, a small elevated commitment
   statement right — echoes the reference site's closing "text+button /
   reply-time" split, replacing the plain stacked text + mismatched photo */
.contact-row{display:grid;grid-template-columns:minmax(0,1fr) minmax(220px,300px);gap:48px;align-items:start;margin:28px 0 36px}
.contact-copy p{margin:0 0 24px}
.contact-promise{background:var(--panel-2);border:1px solid var(--line);border-left:2px solid var(--ink);border-radius:8px;padding:24px 28px}
.contact-promise p{margin:0;font-weight:600;font-size:clamp(17px,1.8vw,20px);line-height:1.5;color:var(--ink)}
.contact-info{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}
.contact-info li{display:flex;gap:16px;padding:16px 2px;margin:0;border-bottom:1px solid var(--line);color:var(--sub)}
.contact-info li:before{display:none}
.contact-info li span{flex:none;width:70px;color:var(--muted);font-size:13px;letter-spacing:.06em}
.contact-info li a{color:var(--sub)}

/* cost note + a small tilted photo alongside it, so the section doesn't read
   as one long text->picture->text column */
.cost-row{display:grid;grid-template-columns:1fr minmax(220px,340px);gap:36px;align-items:center;margin:40px 0}
.cost-note{background:rgba(255,255,255,.04);border:1px solid var(--dark-line);
  border-left:3px solid var(--accent);border-radius:8px;padding:24px 28px}
.cost-note p{margin:0}
.cost-art{justify-self:end}
.cost-art .sec-image,.cost-art .img-placeholder{width:100%;margin:0}

/* FAQ as a hairline-divided disclosure list, styled after the reference
   site's "Arguments" row list rather than stacked Q/A paragraphs */
.faq-list{margin:24px 0;border-top:1px solid var(--line)}
.faq-row{border-bottom:1px solid var(--line)}
.faq-q{display:flex;align-items:center;justify-content:space-between;gap:24px;width:100%;
  background:none;border:none;padding:28px 0;margin:0;text-align:left;cursor:pointer;
  font:inherit;color:inherit}
.faq-q span:first-child{font-weight:700;font-size:clamp(19px,2.2vw,24px);
  line-height:1.3;color:var(--ink)}
.faq-toggle{flex:none;position:relative;width:18px;height:18px}
.faq-toggle:before,.faq-toggle:after{content:"";position:absolute;top:50%;left:50%;background:var(--sub);
  transition:transform .2s ease,opacity .2s ease}
.faq-toggle:before{width:14px;height:1.5px;transform:translate(-50%,-50%)}
.faq-toggle:after{width:1.5px;height:14px;transform:translate(-50%,-50%)}
.faq-row.open .faq-toggle:after{transform:translate(-50%,-50%) rotate(90deg);opacity:0}
.faq-a{display:grid;grid-template-rows:0fr;transition:grid-template-rows .3s ease}
.faq-a>div{overflow:hidden}
.faq-a p{margin:0 0 28px;color:var(--sub);max-width:720px}
.faq-row.open .faq-a{grid-template-rows:1fr}

.eyebrow{font-family:"Noto Sans TC","Microsoft JhengHei","PingFang TC",sans-serif;font-size:13px;letter-spacing:.08em;text-transform:none;color:var(--sub);font-weight:500;margin:0 0 20px;display:flex;align-items:center;gap:12px}
.eyebrow:before{content:counter(secnum,decimal-leading-zero) " / ";display:block;flex:none}
h2{font-size:clamp(30px,4vw,56px);line-height:1.08;margin:0 0 30px;font-weight:800;color:var(--ink);max-width:820px;letter-spacing:-.015em}
h3{font-size:clamp(21px,2.3vw,28px);line-height:1.42;margin:38px 0 16px;font-weight:700;color:var(--ink);letter-spacing:-.01em}
p{margin:13px 0;color:var(--sub)}
strong{color:var(--ink);font-weight:700}
ul{margin:14px 0;padding-left:0;list-style:none;color:var(--sub)}
li{margin:11px 0;padding-left:28px;position:relative}
li:before{content:"";position:absolute;left:4px;top:12px;width:8px;height:8px;background:var(--ink);border-radius:50%}
ol{counter-reset:n;list-style:none;padding-left:0}
ol li{counter-increment:n;padding-left:44px;margin:16px 0}
ol li:before{content:counter(n);position:absolute;left:0;top:2px;display:inline-block;width:26px;height:26px;line-height:26px;text-align:center;background:var(--ink);color:var(--bg);border-radius:50%;font-size:14px;font-weight:700}
/* the AI-hub illustration sits beside the services table rather than as a
   generic banner above it — it's a visual of the thing the table's 3 rows
   describe (an AI hub orchestrating your workflows), not decoration */
/* "02" concept panel: intro copy + AI-hub illustration share one tinted,
   bordered container so they read as a single "pitch" moment (shared
   background/radius/padding), rather than two independent elements merely
   placed side-by-side in a bare grid. The services table is a separate,
   standalone card tier below — not part of this panel. */
.svc-panel{display:grid;grid-template-columns:minmax(220px,1fr) minmax(300px,520px);
  gap:40px;align-items:center;background:var(--panel-2);border-radius:8px;
  padding:40px 44px;margin:24px 0 48px;box-shadow:0 10px 30px rgba(16,35,63,.06)}
.svc-panel-copy p{margin:0;font-size:clamp(16px,1.6vw,18.5px)}
.svc-panel-art{display:flex;justify-content:center}
.svc-panel-art .sec-image{width:100%;max-width:520px;margin:0}
.svc-table-wrap{margin:0 0 24px}
.tablewrap{overflow-x:auto;margin:24px 0;-webkit-overflow-scrolling:touch;border-radius:8px;border:1px solid var(--line);box-shadow:0 10px 30px rgba(16,35,63,.06)}
table{border-collapse:collapse;width:100%;font-size:15px;background:var(--panel)}
th{background:var(--accent-dark);color:var(--dark-ink);text-align:left;padding:14px 16px;font-weight:700;letter-spacing:.01em}
td{padding:14px 16px;border-bottom:1px solid var(--line);color:var(--sub);vertical-align:top}
tbody tr:nth-child(even){background:var(--accent-soft)}
.badge{display:inline-flex;align-items:center;justify-content:center;min-width:28px;height:28px;padding:0 8px;border-radius:6px;background:var(--ink);color:#fff;font-weight:700;font-size:13px;white-space:nowrap}
hr{border:none;border-top:1px solid var(--line);margin:34px 0}
code{background:var(--panel-2);color:var(--sub);padding:2px 6px;font-size:14px;border-radius:2px}
a{color:var(--accent-hover)}

/* tabs */
#service-detail{margin-top:56px}
.tabs{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:26px}
.tab-btn{background:var(--panel);border:1px solid var(--line);border-bottom:3px solid var(--line);color:var(--sub);padding:12px 22px;border-radius:8px;
  font-family:inherit;font-weight:600;font-size:15px;cursor:pointer;white-space:nowrap;transition:color .15s,border-color .15s,background .15s,box-shadow .15s}
.tab-btn:nth-child(1){border-bottom-color:var(--tag-purple)}
.tab-btn:nth-child(2){border-bottom-color:var(--tag-teal)}
.tab-btn:nth-child(3){border-bottom-color:var(--tag-green)}
.tab-btn:hover{color:var(--ink);border-color:var(--ink)}
.tab-btn.active{background:var(--accent);color:#fff;border-color:var(--accent);box-shadow:0 6px 18px rgba(36,107,253,.22)}
.tab-panel[hidden]{display:none}

/* clickable table rows that jump to a tab/section below */
.svc-row{cursor:pointer;transition:background .15s}
.svc-row:hover td,.svc-row:focus-visible td{background:var(--accent-soft)}
.svc-row:focus-visible{outline:2px solid var(--accent);outline-offset:-2px}
.svc-row td:last-child{position:relative;padding-right:34px}
.svc-row td:last-child:after{content:"›";position:absolute;right:14px;top:50%;transform:translateY(-50%);
  color:var(--accent);font-size:20px;font-weight:700;opacity:0;transition:opacity .15s,transform .15s}
.svc-row:hover td:last-child:after,.svc-row:focus-visible td:last-child:after{opacity:1;transform:translate(4px,-50%)}

/* image placeholder */
.img-placeholder{aspect-ratio:var(--ar,16/9);background:var(--panel-2);border:1.5px dashed var(--line);border-radius:10px;
  display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;padding:22px;margin:28px 0;gap:8px}
.img-placeholder .ph-label{color:var(--sub);font-size:13px;letter-spacing:.08em;text-transform:none;font-weight:500}
.img-placeholder .ph-prompt{color:var(--sub);font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:13px;line-height:1.6;max-width:520px}
.sec-image{aspect-ratio:var(--ar,16/9);width:100%;object-fit:cover;border-radius:10px;margin:28px 0;display:block;box-shadow:0 10px 30px rgba(16,35,63,.08)}
/* full-color glossy PNG illustrations read better with a soft radius + faint
   ambient shadow than a hard-edged, shadow-free box */
.sec-image[src$=".png"]{border:none;border-radius:10px;box-shadow:0 8px 24px rgba(16,35,63,.05);object-fit:contain}

/* footer — deliberately kept dark navy for contrast against an otherwise all-white/light-blue site */
.foot{background:var(--foot-bg);color:var(--foot-sub);padding:54px 0 40px;font-size:15px}
.foot .wrap{display:flex;justify-content:space-between;gap:40px;flex-wrap:wrap}
.foot a{color:var(--foot-sub);text-decoration:none}
.foot a:hover{color:var(--foot-ink);text-decoration:underline}
.foot h4{color:var(--foot-ink);font-size:15px;margin:0 0 14px;letter-spacing:.05em}
.foot ul{padding:0;margin:0;list-style:none}
.foot li{padding:0;margin:7px 0}
.foot li:before{display:none}
.foot .legal{border-top:1px solid var(--foot-line);margin-top:38px;padding-top:22px;font-size:13.5px;color:var(--foot-sub);display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}

/* one section runs full-bleed dark ink for contrast rhythm, mirroring the
   reference site's single high-contrast break in an otherwise light page */
#how{background:var(--dark-bg)}
#how .eyebrow,#how .eyebrow:before,#how p,#how .evidence-sub{color:var(--dark-sub)}
#how h2,#how h3,#how strong,#how .evidence-num,#how .evidence-lead{color:var(--dark-ink)}
#how .img-placeholder{border-color:var(--dark-line);background:rgba(255,255,255,.04)}

@media(max-width:980px){
  .hero{flex-direction:column;align-items:stretch;min-height:0;padding-top:44px}
  .hero-art{position:static;order:-1;width:100%;max-width:none;height:auto;aspect-ratio:16/9;margin-bottom:32px;
    -webkit-mask-image:none;mask-image:none}
  .hero-copy{max-width:none}
  .hero p{max-width:none}
  .cost-row{grid-template-columns:1fr}
  .cost-art{justify-self:start;max-width:280px}
  .contact-row{grid-template-columns:1fr}
  .svc-panel{grid-template-columns:1fr;gap:24px;padding:28px 24px;margin:20px 0 32px}
  .svc-panel-art .sec-image{max-width:300px}
}
@media(max-width:1360px){
  /* Threshold (with .nav .wrap's 1400px max-width above) picked so the full
     nav (brand + all links) always fits on one row before links collapse
     into the hamburger menu — English labels need more width than Chinese,
     so this must switch well before either language would wrap.
     The hamburger sits in .nav-left next to the brand (left edge of the
     bar); .navlinks (lang toggle + CTA, and the dropdown when open) is
     pushed to its own full-width row so it can't crowd .nav-left. */
  .nav-toggle{display:inline-flex}
  .navlinks{flex:1 0 100%;justify-content:flex-end}
  .lang-toggle{order:1}
  .navcta{order:2}
  .nav-links-list{
    display:none;
    order:3;
    flex:1 0 100%;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    margin-top:10px;
    padding-top:6px;
    border-top:1px solid var(--line);
  }
  .nav-links-list.open{display:flex}
  .nav-links-list a{padding:12px 4px;border-bottom:1px solid var(--line);width:100%}
  .nav-links-list a:last-child{border-bottom:none}
}
@media(max-width:860px){
  .sec{padding:52px 0}
  .hero{padding:64px 0 70px}
  .foot .wrap{flex-direction:column;gap:28px}
}
@media(max-width:680px){
  /* Once stacked, the tagline can still overflow a narrow phone's own row
     (brand uses white-space:nowrap) — hide it well before that happens. */
  .brand span{display:none}
  .brand-logo{height:58px}
  .why-row{grid-template-columns:1fr}
  .why-art .sec-image{height:auto;aspect-ratio:16/9}
}
@media(max-width:520px){
  body{font-size:16px}
  .wrap{padding:0 18px}
  .hero h1{font-size:26px}
  .hero-art{aspect-ratio:4/3}
  .sec{padding:42px 0}
  table{font-size:13.5px}
  th,td{padding:10px 11px}
  .btn{padding:12px 22px;font-size:15px}
  .evidence-row{grid-template-columns:64px 1fr;gap:16px;padding:20px}
}