/* Reference: existing Cike and App Lock case layouts, native CSS.
   DESIGN_VARIANCE: 6 / MOTION_INTENSITY: 3 / VISUAL_DENSITY: 4.
   Single light theme; product green is the only interface accent. */
:root{color-scheme:light;--paper:#edf0ec;--surface:#e0e7df;--ink:#202b25;--muted:#5e6a61;--accent:#096956;--line:#cdd5cc;--radius:16px;font-family:"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;font-synthesis:none}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scrollbar-gutter:stable}
body{margin:0;min-width:320px;background:var(--paper);color:var(--ink);-webkit-font-smoothing:antialiased}
img{display:block;width:100%;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;cursor:pointer;border:0;background:none;padding:0}
a,button{-webkit-tap-highlight-color:transparent}
a:focus-visible,button:focus-visible{outline:2px solid var(--accent);outline-offset:6px}
[hidden]{display:none!important}
h1,h2,p,figure,dl,dd{margin:0}
h1,h2{letter-spacing:-.06em;line-height:1.18;font-weight:650;text-wrap:balance}
h2{font-size:clamp(36px,3.4vw,54px)}
p{font-size:16px;line-height:1.9;color:var(--muted)}
em{font-style:normal;color:var(--accent)}
::selection{background:#cbdcd0;color:var(--ink)}
.skip-link{position:fixed;top:-80px;left:24px;z-index:30;padding:12px 18px;background:var(--paper)}
.skip-link:focus{top:12px}
.masthead{position:absolute;top:0;left:0;right:0;height:80px;padding-inline:3.4vw;display:flex;align-items:center;justify-content:space-between;z-index:10}
.brand{display:flex;gap:16px;align-items:center;min-height:44px}
.brand b{font-size:34px;line-height:1.2;font-weight:800;letter-spacing:-.12em}
.brand span{font-size:12px;font-weight:600;letter-spacing:.1em}
.back-link{font-size:14px;min-height:44px;display:flex;align-items:center;gap:20px;white-space:nowrap}
.back-link span{color:var(--accent)}
.chapters{position:fixed;top:50%;left:3.4vw;width:150px;transform:translateY(-50%);display:grid;gap:18px;z-index:11}
.chapters a{display:flex;gap:16px;align-items:center;min-height:32px;font-size:13px;color:var(--muted);white-space:nowrap}
.chapters a span{font-size:11px;font-variant-numeric:tabular-nums}
.chapters a b{font-weight:400}
.chapters a[aria-current]{color:var(--accent)}
.chapters a[aria-current] b{font-weight:700}
.chapters a:hover,.back-link:hover,.case-footer a:hover{color:var(--accent)}
main{margin-left:clamp(210px,16.5vw,310px);margin-right:3.4vw}
.screen{position:relative;max-width:1480px;margin-inline:auto;min-height:100dvh;padding:76px 0 60px;display:flex;flex-direction:column;justify-content:center;scroll-margin-top:0}
.screen+.screen{border-top:1px solid var(--line)}
.cover{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);gap:5%;align-items:center;padding-top:88px}
.cover-copy{position:relative;z-index:1;min-width:0}
.project-kind{font-size:13px;letter-spacing:.06em;margin-bottom:28px}
.cover h1{font-size:clamp(66px,6.4vw,108px);line-height:1.05;font-weight:750}
.cover h1 span{display:block}
.cover-lead{font-size:clamp(23px,2.1vw,32px);line-height:1.6;font-weight:600;letter-spacing:-.03em;color:var(--ink);margin-top:28px}
.start{display:inline-flex;align-items:center;justify-content:space-between;gap:56px;margin-top:32px;padding:8px 0 12px;font-size:14px;font-weight:650;border-bottom:1px solid var(--ink);white-space:nowrap}
.start span{color:var(--accent);transition:transform .2s}
.start:hover span{transform:translateY(3px)}








.needs-copy h2{font-size:clamp(36px,3.4vw,52px);margin-bottom:30px;line-height:1.32}
.needs-copy h2 em{display:block}
.needs-copy p{max-width:24em}
.needs-copy p+p{margin-top:20px}




.poster img{user-select:none}








.poster:focus-visible{outline-offset:-4px}
.section-heading{margin-bottom:30px}
.section-heading p{max-width:760px;margin-top:18px}
.workflow{padding-top:62px}
.board-tabs{display:flex;gap:36px;align-items:center;border-bottom:1px solid var(--line);margin-bottom:26px}
.board-tabs button{font-size:14px;min-height:44px;position:relative;color:var(--muted);white-space:nowrap}
.board-tabs [aria-selected=true]{color:var(--accent);font-weight:650}
.board-tabs [aria-selected=true]:after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:2px;background:var(--accent)}
.board-stage{position:relative;height:clamp(360px,calc(100svh - 350px),700px);width:100%}
.board-panel{height:100%;width:100%}
.board-image{display:flex;align-items:center;justify-content:center;height:100%;width:100%;cursor:zoom-in}
.board-image img{width:auto;height:auto;max-height:100%;max-width:100%;object-fit:contain;border-radius:var(--radius)}
.flow-strip{display:none}
.results .section-heading{margin-bottom:0}
.result-metrics{display:grid;grid-template-columns:1fr 1fr;gap:12%;max-width:970px;margin-top:60px}
.result-metrics dt{font-size:16px;color:var(--muted);margin-bottom:22px}
.result-metrics dd{display:flex;align-items:baseline;gap:18px;line-height:1.08;white-space:nowrap}
.result-metrics strong{font-size:clamp(100px,9.7vw,152px);font-weight:550;letter-spacing:-.08em;font-variant-numeric:tabular-nums}
.rating-result strong{color:var(--accent)}
.result-metrics dd span{font-size:18px;color:var(--muted)}
.count-result{border-left:1px solid var(--line);padding-left:18%}
.rating-evidence{position:relative;width:230px;aspect-ratio:264/121;overflow:hidden;margin-top:30px}
.rating-evidence img{position:absolute;width:129.545455%;max-width:none;left:0;top:0}
.case-footer{display:flex;justify-content:space-between;gap:24px;max-width:970px;margin-top:64px;padding-top:22px;border-top:1px solid var(--line);font-size:13px}
.case-footer a{display:flex;align-items:center;min-height:44px}
.image-dialog{padding:0;width:min(94vw,1460px);max-height:94svh;border:1px solid var(--line);border-radius:var(--radius);background:var(--paper);color:var(--ink);overflow:auto}
.image-dialog::backdrop{background:#10251dc4}
.dialog-surface{padding:22px}
.dialog-header{display:flex;justify-content:space-between;align-items:center;gap:24px;margin-bottom:16px}
.dialog-header h2{font-size:18px;line-height:1.5;letter-spacing:0}
.dialog-close{min-height:44px;padding-inline:14px;font-size:14px;background:var(--surface);border-radius:8px;white-space:nowrap}
.dialog-close:hover{background:var(--line)}
.dialog-scroll{overflow:auto;max-height:calc(94svh - 110px);overscroll-behavior:contain}
.dialog-image{width:auto;max-width:100%;max-height:none;height:auto;margin-inline:auto}
.dialog-scroll.is-board .dialog-image{width:100%;max-width:none}
body.has-dialog{overflow:hidden}
@media(min-width:901px) and (max-height:740px){.screen{padding-top:54px;padding-bottom:42px}.cover{padding-top:86px}.project-kind{margin-bottom:20px}.cover h1{font-size:76px}.cover-lead{font-size:24px;margin-top:20px}.start{margin-top:22px}.needs-copy h2{font-size:36px;margin-bottom:22px}.needs-copy p{font-size:14px}.board-stage{height:clamp(320px,calc(100svh - 280px),540px)}.section-heading{margin-bottom:20px}.section-heading p{margin-top:12px;font-size:14px}.board-tabs{margin-bottom:18px}.result-metrics{margin-top:36px}.result-metrics strong{font-size:112px}.case-footer{margin-top:38px}}
@media(min-width:901px) and (max-width:1200px){main{margin-left:195px;margin-right:30px}.chapters{left:30px;width:145px;font-size:12px}.cover{grid-template-columns:.8fr 1.2fr;gap:4%}.cover h1{font-size:70px}.cover-lead{font-size:24px}.needs-copy h2{font-size:36px}.needs-copy p{font-size:14px}.section-heading h2{font-size:38px}}
@media(max-width:900px){html{scroll-padding-bottom:75px}.masthead{padding-inline:28px;height:76px}.chapters{top:auto;bottom:0;left:0;width:100%;transform:none;display:flex;justify-content:space-around;gap:0;background:var(--paper);border-top:1px solid var(--line);padding:9px 10px calc(9px + env(safe-area-inset-bottom))}.chapters a{display:grid;justify-items:center;gap:2px;min-height:40px;font-size:12px}.chapters a span{font-size:10px}.chapters a b{font-weight:450}.chapters a[aria-current] b{font-weight:700}main{margin-inline:28px}.screen{min-height:0;padding:66px 0 64px}.cover{min-height:100dvh;padding-top:108px;padding-bottom:96px;grid-template-columns:.83fr 1.17fr;gap:5%}.cover h1{font-size:clamp(62px,8.5vw,80px)}.cover-lead{font-size:25px}.needs-copy h2{font-size:36px}.needs-copy p{font-size:14px}.section-heading{margin-bottom:24px}.section-heading h2{font-size:36px}.section-heading p{font-size:15px}.board-stage{height:490px}.result-metrics{margin-top:44px;gap:10%}.result-metrics strong{font-size:100px}.case-footer{margin-top:44px}.results{padding-bottom:100px}}
@media(max-width:600px){.masthead{height:72px;padding-inline:22px}.brand{gap:13px}.brand b{font-size:30px}.brand span{font-size:11px}.back-link{font-size:12px;gap:10px}main{margin-inline:22px}.screen{padding:54px 0}.cover{display:flex;align-items:stretch;min-height:0;padding-top:112px;padding-bottom:76px;gap:0}.project-kind{font-size:12px;margin-bottom:23px}.cover h1{font-size:clamp(50px,13.8vw,70px);line-height:1.14;letter-spacing:-.06em}.cover h1 span{display:inline}.cover-lead{font-size:22px;line-height:1.6;margin-top:20px}.cover-lead br{display:none}.start{font-size:13px;margin-top:25px;gap:45px}.needs-copy h2{font-size:34px;margin-bottom:22px}.needs-copy h2 em{display:inline}.needs-copy p{max-width:none;font-size:15px}.needs-copy p+p{margin-top:16px}.section-heading h2{font-size:34px;line-height:1.3}.section-heading p{font-size:15px;line-height:1.9}.board-tabs{gap:30px;margin-bottom:22px}.board-tabs button{font-size:13px}.board-stage{height:420px}.flow-desktop{display:none}.flow-strip{display:grid;grid-auto-flow:column;grid-auto-columns:86%;gap:18px;height:100%;align-items:center;overflow:auto;scroll-snap-type:x mandatory;scrollbar-width:thin;scrollbar-color:var(--line) transparent}.flow-slice{position:relative;aspect-ratio:320/400;width:100%;overflow:hidden;border-radius:12px;cursor:zoom-in;scroll-snap-align:start;background:#f8fbff}.flow-slice img{position:absolute;width:522.5%;max-width:none;top:-72.5%}.stage-1 img{left:0}.stage-2 img{left:-108.125%}.stage-3 img{left:-210.9375%}.stage-4 img{left:-315.9375%}.stage-5 img{left:-420%}.board-image img{border-radius:12px}.result-metrics{margin-top:36px;gap:22px}.result-metrics dt{font-size:14px;margin-bottom:18px}.result-metrics strong{font-size:clamp(72px,20vw,108px)}.result-metrics dd{gap:10px}.result-metrics dd span{font-size:14px}.count-result{padding-left:24px}.rating-evidence{width:206px;margin-top:22px}.case-footer{font-size:12px;margin-top:32px;gap:16px;padding-top:16px}.results{padding-bottom:100px}.dialog-surface{padding:14px}.dialog-header{margin-bottom:12px}.dialog-scroll{max-height:calc(94svh - 95px)}.dialog-scroll.is-board .dialog-image{min-width:960px}.image-dialog{border-radius:12px}}
@media(max-width:370px){main{margin-inline:18px}.masthead{padding-inline:18px}.brand span{font-size:10px}.cover h1{font-size:48px}.cover-lead{font-size:20px}.board-tabs{gap:24px}.board-stage{height:380px}.result-metrics strong{font-size:68px}.count-result{padding-left:17px}.result-metrics dd{gap:8px}.case-footer{font-size:11px}.chapters a{font-size:11px}.section-heading h2,.needs-copy h2{font-size:31px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}


/* Complete source posters: no masks, negative offsets, or tilted collage. */
.cover-art{position:relative;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));align-items:center;justify-items:center;gap:24px;height:auto;min-height:0;min-width:0}
.cover-art:before{content:"";position:absolute;inset:10% -2% 3%;background:var(--surface);border-radius:50%;z-index:-1}
.hero-device{position:relative;width:min(100%,260px,28svh);max-width:none}
.hero-camera{margin-top:48px}
.hero-ai{margin-bottom:48px}
.hero-poster{width:100%;box-shadow:0 22px 38px -24px #1535285e}
.hero-poster img{width:100%;height:auto;max-width:100%;margin:0;border-radius:12px;user-select:none}
.needs{display:flex;flex-direction:column;align-items:stretch;justify-content:center;gap:34px}
.needs-copy h2{margin-bottom:20px}
.needs-copy h2 em{display:inline}
.needs-copy p{max-width:850px}
.needs-copy p+p{margin-top:12px}
.product-gallery{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:20px;align-items:start;width:100%}
.poster{display:block;min-width:0;width:100%;cursor:zoom-in;box-shadow:0 12px 22px -17px #18352b66}
.poster img{width:100%;height:auto;max-width:100%;margin:0;border-radius:12px}
.poster:focus-visible{outline-offset:5px}
@media(min-width:901px) and (max-height:740px){.cover-art{gap:20px}.hero-device{width:min(100%,245px,27svh)}.hero-camera{margin-top:36px}.hero-ai{margin-bottom:36px}.needs{gap:26px}.product-gallery{gap:16px}}
@media(max-width:900px){.cover-art{gap:20px}.hero-device{width:min(100%,240px)}.hero-camera{margin-top:38px}.hero-ai{margin-bottom:38px}.needs{gap:30px}.needs-copy p{max-width:780px}.product-gallery{gap:14px}}
@media(max-width:600px){.cover-art{width:100%;max-width:440px;align-self:center;gap:18px;margin-top:34px}.hero-device{width:100%;max-width:190px}.hero-camera{margin-top:32px}.hero-ai{margin-bottom:32px}.hero-poster img{border-radius:10px}.needs{gap:28px}.needs-copy p{max-width:none}.product-gallery{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px 14px}.poster img{border-radius:10px}}