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@media(min-width:1600px){.hero-layout{min-height:490px}.hero-art{height:420px}.app-panel{min-height:695px}}
@media(max-width:1100px){.wrap{width:calc(100% - 64px)}.header{padding:0 32px}.header nav{gap:22px}.hero-layout{gap:20px}.hero h1{font-size:9vw}.hero-art{height:340px}.voice-cue{left:0;font-size:11px;padding:12px}.hero-zh{font-size:22px}.hero-bottom{gap:45px}.section-heading{gap:50px}.app-panel{grid-template-columns:220px 1fr;gap:26px;padding:28px 23px;min-height:550px}.phone-gallery{gap:12px}.phone-button{border-width:3px;border-radius:14px}.app-copy h3{font-size:24px}.flow-panel{padding:25px}.flow-node{padding:15px 10px;min-height:170px}.feedback-cell{padding:19px 16px}.recovery-explorer{grid-template-columns:280px 1fr}.reflection-layout{gap:60px}}
@media(max-width:1100px){.hero-layout{grid-template-columns:1fr 1.1fr}.hero h1{font-size:10vw}.hero-intro{font-size:14px}.hero-art{height:300px}.hero-bottom{grid-template-columns:1.4fr 1fr;gap:30px}.hero-bottom strong{font-size:11px}.touchpoints{gap:15px}.touchpoints>div+div{padding-left:16px}.touchpoints strong{display:block}.app-panel{grid-template-columns:1fr;padding:30px;gap:27px}.app-copy{display:grid;grid-template-columns:1fr 1.1fr;gap:0 36px;padding:0}.app-copy>.mini-label{grid-column:1}.app-copy>h3{grid-column:1;margin:15px 0}.app-copy>p:not(.mini-label){grid-column:1}.app-points{grid-column:2;grid-row:1/4;margin:0}.app-points li:first-child{border-top:0;padding-top:0}.phone-gallery{max-width:650px;gap:23px}.phone-gallery.two{max-width:520px}.phone-gallery.one{grid-template-columns:minmax(0,230px)}.section-heading{grid-template-columns:1fr;gap:24px}.section-heading>p{max-width:600px}.section-heading h2{font-size:38px}.flow-top>p{max-width:270px}.flow-steps{grid-template-columns:repeat(5,minmax(0,1fr));gap:15px}.flow-step:not(:last-child):after{right:-12px;font-size:12px}.flow-node h4{font-size:12px}.flow-node p{font-size:10px}.flow-node{min-height:170px}.node-top{font-size:8px;gap:3px;flex-wrap:wrap;margin-bottom:12px}.flow-example{font-size:9px}.feedback-cell p{font-size:12px}.source-row{align-items:start}.recovery-explorer{grid-template-columns:240px 1fr}.recovery-controls{padding:25px 20px}.recovery-result{padding:29px 24px}.design-decisions{gap:24px}.reflection-layout{grid-template-columns:1fr;gap:30px}.reflection-layout h2{font-size:38px}.reflection-copy{max-width:650px}}
@media(max-width:760px){.wrap{width:calc(100% - 40px)}.header{height:66px;padding:0 20px;gap:16px}.header-project,.brand small{display:none}.brand{font-size:10px;gap:9px}.brand-mark{width:29px;height:29px}.header nav{gap:17px;font-size:11px}.header nav a:first-child,.header nav a:last-child{display:none}.hero-inner{padding-top:34px;padding-bottom:27px}.eyebrow{font-size:8px;gap:9px;letter-spacing:.1em}.eyebrow-line{width:18px}.hero-layout{display:flex;flex-direction:column;align-items:stretch;padding:36px 0 29px;gap:0}.hero h1{font-size:clamp(66px,16vw,94px);line-height:.9}.hero h1 span{display:inline;margin:0}.hero-zh{font-size:21px;margin-top:17px}.hero-intro{font-size:13px;line-height:1.7;margin-top:15px}.hero-intro br:first-child{display:none}.hero-intro br:last-child{display:none}.text-link{margin-top:8px;font-size:11px;padding:9px 0}.hero-art{height:230px;margin-top:29px}.eagle-image{width:100%;transform:rotate(-7deg)}.voice-cue{left:auto;right:4px;bottom:0;font-size:10px;padding:10px 12px}.art-index{font-size:8px;top:0}.art-caption{bottom:-21px;font-size:8px}.hero-bottom{grid-template-columns:1fr;gap:20px;padding-top:21px}.hero-bottom>p{font-size:11px}.hero-bottom>div{justify-self:start}.hero-bottom>div span{display:inline;margin-right:15px}.touchpoints{gap:0;padding:24px 0}.touchpoints>div{display:block;padding-right:10px}.touchpoints>div+div{padding-left:12px}.touchpoints>div>span{font-size:9px;display:block;margin-bottom:8px}.touchpoints strong{font-size:13px;display:block;margin-right:0}.touchpoints p{font-size:10px}.touchpoints small{display:none}.section{padding:65px 0;scroll-margin-top:12px}.section-id>span:last-child{display:none}.section-id{font-size:9px;letter-spacing:.1em}.section-heading{margin:32px 0 29px;gap:21px}.section-heading h2{font-size:30px}.section-heading>p{font-size:13px}.tabs{gap:3px;padding-bottom:12px}.tabs button{padding:10px 16px;font-size:12px}.app-panel{padding:26px 18px;gap:27px;min-height:0}.app-copy{display:block}.app-copy h3{font-size:24px;margin:15px 0 13px}.app-copy>p:not(.mini-label){font-size:12px}.app-points{display:grid;grid-template-columns:1fr 1fr;gap:15px;margin-top:21px}.app-points li{padding:12px 0}.app-points li:first-child{border-top:1px solid var(--line);padding-top:12px}.app-points h4{font-size:12px}.app-points p{font-size:11px}.app-points span{display:none}.phone-gallery{gap:14px;grid-template-columns:repeat(2,minmax(0,1fr));max-width:380px;justify-content:center}.phone-gallery .phone-figure:last-child:nth-child(3){grid-column:1/-1;width:calc((100% - 14px)/2);justify-self:center}.phone-gallery.two{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.phone-gallery.one{grid-template-columns:minmax(0,210px)}.phone-figure figcaption{font-size:10px;gap:7px;margin-top:11px}.phone-figure figcaption>span{font-size:8px}.source-row{display:block;margin-top:17px}.source-row p{font-size:10px}.source-link{font-size:10px;margin-top:6px}.flow-panel{padding:24px 17px}.flow-top{display:block;margin-bottom:23px}.flow-top h3{font-size:21px}.flow-top>p{max-width:none;margin-top:14px;font-size:11px}.flow-steps{grid-template-columns:1fr;gap:16px}.flow-step:not(:last-child):after{content:"↓";left:19px;right:auto;top:auto;bottom:-14px;font-size:13px}.flow-node{min-height:0;padding:14px 15px;display:grid;grid-template-columns:32px 1fr;gap:5px 10px}.node-top{grid-column:1;grid-row:1/3;display:flex;flex-direction:column;align-items:start;justify-content:start;font-size:9px;gap:7px;margin:0}.node-top>span:last-child{writing-mode:vertical-rl;letter-spacing:.07em;font-size:8px}.flow-node h4{grid-column:2;font-size:13px;margin:0}.flow-node p{grid-column:2;font-size:11px}.flow-example{margin:6px 0 0 57px;font-size:10px}.scenario-strip{display:block;padding:22px 0 17px;margin-top:22px}.scenario-options{margin-top:12px;gap:7px}.scenario-options button{font-size:10px;padding:7px 11px}.feedback-board{grid-template-columns:1fr}.feedback-cell{min-height:0;padding:18px}.feedback-cell+.feedback-cell{border-left:0;border-top:1px solid #2c425d}.feedback-cell>span{font-size:9px;margin-bottom:9px}.feedback-cell p{font-size:12px}.flow-original{display:block;padding-top:17px;margin-top:23px}.flow-original p{font-size:10px;margin-bottom:14px}.flow-original img{width:100px;height:36px}.flow-original button{font-size:10px}.design-decisions{grid-template-columns:1fr;gap:25px;margin-top:32px}.design-decisions h3{font-size:19px;margin-top:12px}.recovery-explorer{grid-template-columns:1fr}.recovery-controls{border-right:0;border-bottom:1px solid #38516a;padding:23px}.recovery-controls fieldset{margin:19px 0}.control-note{margin-top:17px;font-size:10px}.control-note br{display:none}.recovery-result{padding:25px 22px;min-height:340px}.recovery-result h3{font-size:22px}.recovery-result>p{font-size:12px}.recovery-message{padding:19px}.recovery-message strong{font-size:13px}.result-footer{font-size:10px;display:block}.result-footer span{display:block;margin-bottom:7px}.matrix-heading{display:block;margin-top:34px}.matrix-heading h3{font-size:20px}.matrix-heading p{margin-top:7px;font-size:10px}th,td{padding:14px 18px}.spec-links{gap:9px}.spec-links button{padding:13px 12px;gap:15px;font-size:10px;flex:1;justify-content:space-between}.reflection-layout{margin:35px 0;gap:28px}.reflection-layout h2{font-size:30px}.reflection-copy>p{font-size:13px}.next-thinking{display:block;padding:22px 0}.next-thinking p{font-size:11px;margin-top:11px}.references{gap:16px;font-size:10px}.references>span{width:100%}.references p{font-size:9px}.footer{padding:45px 0 100px}.footer strong{font-size:27px}.footer span{font-size:8px}.footer a{font-size:9px}.dialog-bar{padding:12px 14px;font-size:10px}.dialog-tools{padding:9px 14px;gap:10px}.dialog-tools>span{display:none}}
@media(prefers-reduced-motion:reduce){:root{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important}}

/* ===== Unified spec (tasks/unify.md): shared type scale, Inter + Noto Sans TC, mono labels,
   #dcdcdc greys on dark, auto-hiding sticky header, 90px / 1400px desktop column. ===== */
:root{font-family:var(--font-sans);--muted:#dcdcdc}
.eyebrow,.section-id,.mini-label,.art-index,.art-caption,.brand small,.header-project,.design-decisions span,.result-status,.touchpoints small,.footer span,.footer a,.app-points span,.deliverables span{font-family:"JetBrains Mono",ui-monospace,"SF Mono",Menlo,monospace;font-weight:500}
/* labels / tags */
.eyebrow,.section-id,.section-id>span:last-child,.mini-label,.art-index,.art-caption,.header-project,.design-decisions span,.result-status,.touchpoints small,.touchpoints>div>span,.footer span,.footer a,.app-points span,.deliverables span,.references p,.control-note{font-size:var(--t-tag-size);line-height:var(--t-tag-line)}
.header nav{font-size:var(--t-small-size);line-height:var(--t-small-line)}
/* hero */
.hero h1{font-size:var(--t-display-xl-size);line-height:var(--t-display-xl-line);font-weight:700;letter-spacing:-.05em}
.hero-zh{font-size:var(--t-h4-size);line-height:var(--t-h4-line)}
.hero-intro{font-size:var(--t-body-size);line-height:var(--t-body-line)}
/* section titles 中標題 */
.section-heading h2,.reflection-layout h2{font-size:var(--t-h2-size);line-height:var(--t-h2-line);font-weight:700;letter-spacing:-.02em}
/* 超小標題 2 */
.app-copy h3,.recovery-result h3,.matrix-heading h3,.flow-top h3,.footer strong{font-size:var(--t-h5-size);line-height:var(--t-h5-line);font-weight:700}
/* 超小標題 3 */
.design-decisions h3,.touchpoints strong,.app-points h4,.recovery-message strong{font-size:var(--t-h6-size);line-height:var(--t-h6-line);font-weight:700}
/* 一般描述 */
.section-heading>p,.reflection-copy>p{font-size:var(--t-body-size);line-height:var(--t-body-line)}
/* 小描述 / tab */
.hero-bottom>p,.touchpoints p,.app-copy>p:not(.mini-label),.app-points p,.flow-top>p,.design-decisions p,.recovery-result>p,.next-thinking p,.source-row p,.matrix-heading p,.tabs button,.segmented span{font-size:var(--t-small-size);line-height:var(--t-small-line)}
/* buttons */
.text-link{font-size:var(--t-btn-m-size);line-height:var(--t-btn-m-line);font-weight:var(--t-btn-m-weight)}
.source-link,.spec-links button,.scenario-options button{font-size:var(--t-btn-s-size);line-height:var(--t-btn-s-line);font-weight:var(--t-btn-s-weight)}

/* Header: sticky, slides away while scrolling down, returns on scroll up. */
.header{position:sticky;top:0;z-index:50;transition:transform .35s cubic-bezier(.2,.7,.2,1)}
.header.is-hidden{transform:translateY(-100%)}
@media (prefers-reduced-motion:reduce){.header{transition:none}}
/* Desktop gutters: 90px sides, 1400px column; header aligned to it. */
@media(min-width:0px){.wrap{width:min(1400px,calc(100% - 2 * var(--gutter)))}.header{padding:0 max(var(--gutter),calc((100% - 1400px)/2))}}

/* Let the original spec follow the concise flow summary at full panel width. */
.flow-spec{display:block;width:100%;padding:0;margin-top:52px;border:1px solid #40516d;background:#fff;cursor:zoom-in}
.flow-spec img{display:block;width:100%;height:auto}
.flow-spec:hover{border-color:var(--blue)}
.flow-spec:focus-visible{outline:2px solid var(--cyan);outline-offset:5px}
@media(max-width:760px){.flow-spec{margin-top:30px}}

/* Compact flow summaries while keeping their text and connector arrows aligned. */
@media(min-width:761px){
  .flow-node{min-height:130px;height:100%;padding:14px}
  .node-top{margin-bottom:12px}
  .flow-node h4{margin-bottom:7px}
  .flow-step:not(:last-child):after{top:50%;transform:translateY(-50%)}
}

/* KV: keep visible artwork and copy centered in independent responsive columns. */
.hero-grid{display:none}
.hero-inner{padding:clamp(40px,4vw,64px) 0}
.hero-layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);align-items:center;gap:clamp(40px,5vw,80px);min-height:clamp(500px,42vw,700px);padding:40px 0}
.hero-copy{min-width:0}
.hero h1{font-size:75px;line-height:1.05;letter-spacing:-.04em}
.hero h1 span{display:block;white-space:nowrap;margin-top:12px}
.hero-zh{margin-top:32px}
.hero-intro{max-width:36em;margin-top:24px}
.hero .text-link{margin-top:38px}
.hero-art{position:relative;display:block;width:100%;height:auto;aspect-ratio:961/428;margin:0;overflow:hidden;filter:drop-shadow(0 24px 16px #0006)}
.hero-art .eagle-image{position:absolute;width:129.864724%;height:auto;max-width:none;left:-14.984391%;top:-99.299065%;transform:none;filter:none}
@media(min-width:761px) and (max-width:1100px){.hero-layout{grid-template-columns:minmax(465px,1.15fr) minmax(0,1fr);gap:32px}}
@media(max-width:760px){
 .hero-layout{grid-template-columns:minmax(0,1fr);gap:48px;min-height:0;padding:36px 0 20px}
 .hero h1{font-size:min(75px,11vw)}
 .hero h1 span{display:block;margin-top:10px}
 .hero-zh{margin-top:24px}
 .hero-intro{margin-top:20px}
 .hero .text-link{margin-top:22px}
 .hero-art{width:78%;max-width:400px;justify-self:center;margin:0}
}

/* 01 / HOW IT WORKS — input (video) → glasses response → App, one scenario at a time. */
.how-section{background:var(--dark);padding-top:70px}
.how-stage{display:grid;grid-template-columns:minmax(0,1.55fr) 28px minmax(0,1fr) 28px minmax(0,.62fr);align-items:stretch;gap:14px;margin-top:28px}
.how-col{margin:0;display:flex;flex-direction:column;min-width:0}
.how-step{display:flex;align-items:center;gap:10px;margin:0 0 14px;font-family:"JetBrains Mono",ui-monospace,monospace;font-weight:500;font-size:var(--t-tag-size);line-height:var(--t-tag-line);letter-spacing:.12em;color:#dcdcdc}
.how-step span{color:var(--blue)}
.how-col figcaption{margin-top:14px;font-size:var(--t-small-size);line-height:var(--t-small-line);color:#dcdcdc}
.how-video{position:relative;border-radius:14px;overflow:hidden;background:#000;aspect-ratio:16/9;border:1px solid var(--line)}
.how-video video{display:block;width:100%;height:100%;object-fit:cover}
.how-trigger{position:absolute;left:16px;bottom:16px;padding:9px 16px;border-radius:999px;background:#080c12cc;border:1px solid #6fd4ff66;color:#fff;font-weight:700;font-size:var(--t-small-size);line-height:var(--t-small-line);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}
.how-trigger:before{content:"";display:inline-block;width:8px;height:8px;margin-right:10px;border-radius:50%;background:var(--cyan);box-shadow:0 0 0 0 #6fd4ff99;animation:how-pulse 1.6s infinite;vertical-align:1px}
@keyframes how-pulse{70%{box-shadow:0 0 0 9px #6fd4ff00}100%{box-shadow:0 0 0 0 #6fd4ff00}}
.how-arrow{align-self:center;justify-self:center;color:var(--blue);font-size:22px;margin-top:28px}
.how-chat{flex:1;display:flex;flex-direction:column;justify-content:center;gap:12px;padding:22px;border-radius:14px;background:var(--panel);border:1px solid var(--line);min-height:240px}
.how-line{margin:0;padding:12px 16px;border-radius:12px;font-size:var(--t-small-size);line-height:var(--t-small-line);opacity:0;transform:translateY(8px);transition:opacity .45s ease,transform .45s ease}
.how-line.is-in{opacity:1;transform:none}
.how-line span{display:block;margin-bottom:4px;font-family:"JetBrains Mono",ui-monospace,monospace;font-size:var(--t-tag-size);line-height:var(--t-tag-line);letter-spacing:.08em;color:#dcdcdc}
.how-line.is-you{align-self:flex-end;max-width:88%;background:#1d2b3c;color:#fff}
.how-line.is-glasses{align-self:flex-start;max-width:88%;background:#6fd4ff1f;border:1px solid #6fd4ff55;color:#fff}
.how-line.is-glasses span{color:var(--blue)}
.how-line.is-signal{align-self:center;padding:6px 14px;border-radius:999px;border:1px dashed #6fd4ff66;color:var(--blue);font-family:"JetBrains Mono",ui-monospace,monospace;font-size:var(--t-tag-size);line-height:var(--t-tag-line)}
.how-line.is-signal span{display:none}
.how-phone{display:block;padding:0;border:4px solid #283549;border-radius:19px;background:#101c29;overflow:hidden;box-shadow:0 16px 30px #0005;cursor:zoom-in;width:100%;max-width:220px}
.how-phone img{display:block;width:100%;aspect-ratio:720/1600;object-fit:cover;object-position:top}
.how-foot{margin:26px 0 0;font-size:var(--t-tag-size);line-height:1.6;color:#8a9bb0}
@media(max-width:1100px){
  .how-stage{grid-template-columns:minmax(0,1fr) minmax(0,.62fr);gap:20px}
  .how-input{grid-column:1/-1}
  .how-arrow{display:none}
}
@media(max-width:760px){
  .how-stage{grid-template-columns:minmax(0,1fr)}
  .how-phone{max-width:200px;margin:0 auto}
  .how-app figcaption{text-align:center}
}
/* Same height for the three boxes so the scenario reads as one row within a screen. */
.how-section{--how-h:clamp(300px,26vw,380px)}
.how-stage{grid-template-columns:minmax(0,1.25fr) 28px minmax(0,.85fr) 28px auto;align-items:start}
.how-video{aspect-ratio:auto;height:var(--how-h)}
.how-chat{flex:none;height:var(--how-h);min-height:0}
.how-phone{width:calc(var(--how-h) * 720 / 1600);max-width:none;height:var(--how-h)}
.how-phone img{height:100%;aspect-ratio:auto}
.how-app figcaption{max-width:calc(var(--how-h) * 720 / 1600 + 40px)}
.how-arrow{margin-top:calc(28px + var(--how-h) / 2 - 14px);align-self:start}
@media(max-width:1100px){.how-stage{grid-template-columns:minmax(0,1fr) auto}}
@media(max-width:760px){.how-section{--how-h:320px}.how-stage{grid-template-columns:minmax(0,1fr)}.how-video{height:auto;aspect-ratio:16/9}.how-chat{height:auto;min-height:220px}.how-phone{margin:0 auto}.how-app figcaption{margin-inline:auto}}
/* Desktop: the video keeps its full 16:9 frame (no crop); its height sets the row, and the phone
   and response box are sized to that same height, so all three line up. */
@media(min-width:1101px){
  .how-section{--how-col:calc(100vw - 112px);--how-h:clamp(240px,calc((var(--how-col) - 440px) / 2.23),390px)}
  .how-stage{grid-template-columns:calc(var(--how-h) * 16 / 9) 28px minmax(0,1fr) 28px calc(var(--how-h) * 720 / 1600)}
  .how-video{aspect-ratio:16/9;height:var(--how-h)}
  .how-video video{object-fit:contain}
}
@media(min-width:0px){.how-section{--how-col:min(100vw - 2 * var(--gutter),1400px)}}
/* Video cropped to 4:3 (sides trimmed) so the response box sits nearer the middle of the row. */
@media(min-width:1101px){
  .how-section{--how-h:clamp(240px,calc((var(--how-col) - 440px) / 1.78),390px)}
  .how-stage{grid-template-columns:calc(var(--how-h) * 4 / 3) 28px minmax(0,1fr) 28px calc(var(--how-h) * 720 / 1600)}
  .how-video{aspect-ratio:4/3}
  .how-video video{object-fit:cover}
}
/* Section order: how → interaction → recovery → app; keep alternating backgrounds. */
.app-section{background:#080f18}

/* 03 App UX docs / 04 error handling: show the original documents, large and zoomable. */
.app-section{background:#0e1620}
.recovery-section{background:#080f18}
.doc-panel{margin-top:28px}
.doc-image{position:relative;display:block;width:100%;padding:0;border:1px solid var(--line);border-radius:14px;background:#fff;overflow:hidden;cursor:zoom-in}
.doc-image img{display:block;width:100%;height:auto}
.doc-zoom{position:absolute;right:14px;top:14px;padding:6px 12px;border-radius:999px;background:#080c12cc;color:#fff;font-size:var(--t-tag-size);line-height:var(--t-tag-line);opacity:0;transition:opacity .2s}
.doc-image:hover .doc-zoom,.doc-image:focus-visible .doc-zoom{opacity:1}
.doc-note{margin:14px 0 0;font-size:var(--t-small-size);line-height:var(--t-small-line);color:#dcdcdc}
.doc-wide{margin-top:28px}
.doc-pair{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:20px}
.doc-pair figure{margin:0}
.doc-pair figcaption{margin-top:12px;font-size:var(--t-small-size);line-height:var(--t-small-line);color:#dcdcdc}
@media(max-width:760px){.doc-pair{grid-template-columns:1fr}}
@media(hover:none){.doc-zoom{opacity:1}}
/* Error docs differ in shape: fit each inside one fixed frame so switching tabs does not jump. */
.doc-fit{aspect-ratio:16/9;max-height:76vh}
.doc-fit img{width:100%;height:100%;object-fit:contain}
/* Plain one-line section titles. */
.section-heading{align-items:start}
/* Unify pass 2: the KV picture is a crop window, keep it (centred on the text by case-kv). */
@media(min-width:761px){
  section#top[data-kv] .hero-art[data-kv-art]{display:block!important;height:auto!important;aspect-ratio:961/428}
  section#top[data-kv] .hero-art[data-kv-art] .eagle-image{max-width:none!important;max-height:none!important;width:129.864724%!important;height:auto!important}
}

/* Unify pass 2: section spacing 88 / compact 56 (phone 56 / 40) and section titles on the h2 role. */
main section#how,main section#interaction,main section#app,main section#recovery{padding-top:88px!important;padding-bottom:88px!important}
@media(max-width:760px){main section#how,main section#interaction,main section#app,main section#recovery{padding-top:56px!important;padding-bottom:56px!important}}

/* Tablet KV: keep the eyebrow on one line (shorter rule, tighter tracking). */
@media(min-width:761px) and (max-width:1100px){section#top[data-kv] .eyebrow[data-kv-eyebrow]{white-space:nowrap;letter-spacing:.06em!important;gap:8px;font-size:min(12px,1.18vw)!important}.hero .eyebrow-line{width:18px;flex:0 0 18px}}

/* Phone: the three how-it-works steps become a swipe row, one card per screen with the next one peeking. */
@media(max-width:760px){
 .how-stage{display:flex;gap:12px;overflow-x:auto;scroll-snap-type:x mandatory;margin-inline:-20px;padding:0 20px 6px;scrollbar-width:none}
 .how-stage::-webkit-scrollbar{display:none}
 .how-col{flex:0 0 84%;scroll-snap-align:start;scroll-margin-left:20px}
 .how-video,.how-chat{height:300px!important;min-height:0!important;aspect-ratio:auto!important}
 .how-video video{object-fit:cover}
 .how-chat{overflow:hidden;justify-content:flex-start}
 .how-app{align-items:center}
 .how-phone{width:auto!important;height:300px!important;aspect-ratio:720/1600;margin:0}
 .how-phone img{height:100%;width:100%}
 .how-app figcaption{text-align:center}
}
/* Phone: interaction steps as a compact timeline instead of stacked boxes. */
@media(max-width:760px){
 .flow-steps{position:relative;gap:0;padding-left:22px}
 .flow-steps:before{content:"";position:absolute;left:5px;top:8px;bottom:20px;width:1px;background:#3b5573}
 .flow-step{padding-bottom:18px}
 .flow-step:before{content:"";position:absolute;left:-22px;top:4px;width:11px;height:11px;border-radius:50%;background:#0b1424;border:2px solid #729bd0;box-sizing:border-box}
 .flow-step.decision:before{border-color:#6fd4ff;background:#6fd4ff}
 .flow-step:not(:last-child):after{content:none}
 .flow-node,.flow-step.decision .flow-node{display:block;min-height:0;height:auto;padding:0;border:0;background:none;border-radius:0}
 .node-top{display:flex;flex-direction:row;align-items:center;justify-content:flex-start;gap:6px;margin:0 0 4px;font-size:11px}
 .node-top>span:last-child{writing-mode:horizontal-tb;font-size:11px;letter-spacing:.08em}
 .node-top>span:first-child:after{content:" ·"}
 .flow-node h4{font-size:15px;margin:0 0 2px}
 .flow-step.decision .flow-node h4{color:#a8e5ff}
 .flow-node p{font-size:13px;line-height:1.55;margin:0}
}

/* UX image blocks share one frame: 14px radius, same border, always-available zoom hint. */
.flow-spec{position:relative;border-radius:14px;overflow:hidden;border-color:#293a4d}
.flow-spec:hover .doc-zoom,.flow-spec:focus-visible .doc-zoom{opacity:1}
/* Phone KV: eyebrow stays on one line. */
@media(max-width:760px){section#top[data-kv] .eyebrow[data-kv-eyebrow]{white-space:nowrap;letter-spacing:.06em!important;gap:8px;font-size:min(12px,2.7vw)!important}.hero .eyebrow-line{width:16px;flex:0 0 16px}}

/* Tablet: section titles stack above their intro so authored line breaks hold. */
@media(min-width:761px) and (max-width:1299px){main .section-heading{display:block}main .section-heading>p{max-width:none;margin-top:24px}}