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.product-icon{display:block;width:56px;height:56px;flex-shrink:0;object-fit:contain;border-radius:13px;box-shadow:0 3px 10px #17233612}

/* Career-first narrative and visible app case studies. */
header nav{gap:26px}
.timeline article>span{display:block;line-height:1.85;max-width:430px}
.app-story{margin-top:22px;border-top:1px solid var(--line)}
.story-row{padding:21px 0;border-bottom:1px solid #edf0f4}
.story-row:last-child{border-bottom:0;padding-bottom:6px}
.story-row>span{font-size:9px;letter-spacing:1px;color:#7192c2}
.story-row h4{font-size:14px;line-height:1.6;font-weight:550;margin:8px 0}
.story-row p{font-size:12px;line-height:1.95;color:#7b8797;margin:0}
.story-row small{display:block;font-size:10px;line-height:1.8;color:#98a3b2;margin-top:9px}
.work .product-visual{height:275px}
@media(max-width:1000px){header nav{gap:17px}.timeline article{margin-bottom:25px}}
@media(max-width:700px){.story-row{padding:19px 0}.story-row h4{font-size:14px}.work .product-visual{height:255px}}

/* Personal identity and reversible product cards. */
.hero .hello{font-size:19px;margin:30px 0 10px;color:#75859b}
.hero h1.person-name{font-size:clamp(72px,7.5vw,112px);line-height:1.14;letter-spacing:3px;font-weight:650;margin:0 0 24px}
.hero-statement{font-size:clamp(26px,2.55vw,38px);font-weight:550;line-height:1.55;letter-spacing:-.8px;margin:0}
.flip-card{perspective:1600px;overflow:visible;background:transparent;border:0;border-radius:0}
.card-rotor{display:grid;position:relative;transform-style:preserve-3d;transition:transform 500ms var(--ease-in-out,cubic-bezier(.77,0,.175,1))}
.card-face{border:1px solid #e1e7f0;border-radius:18px;background:white;overflow:hidden}
.card-front{display:flex;flex-direction:column;position:relative}
.card-front .product-visual{flex:1;min-height:275px}
.card-back{padding:25px 28px}
.flip-cue{margin:0 28px 24px;padding-top:17px;border-top:1px solid #edf0f4;display:flex;justify-content:space-between;color:#5682bd;font-size:11px}
.flip-cue span{font-size:18px;line-height:1}
.flip-open{position:absolute;inset:0;width:100%;height:100%;border:0;background:transparent;cursor:pointer;border-radius:18px;z-index:2;display:none}
.flip-open:focus-visible{outline-offset:4px}
.back-heading{display:flex;justify-content:space-between;align-items:center;gap:12px}
.back-heading>div>span{font-size:8px;letter-spacing:1.8px;color:#8ca1bc}
.back-heading h3{font-size:21px;font-weight:550;margin:8px 0 0;letter-spacing:-.3px}
.flip-close{border:1px solid #e1e8f3;background:#f7faff;border-radius:7px;padding:10px 12px;font-size:10px;color:#5b7fae;white-space:nowrap;display:none}
.flip-ready .card-face{grid-area:1/1;backface-visibility:hidden;-webkit-backface-visibility:hidden}
.flip-ready .card-back{transform:rotateY(180deg)}
.flip-ready.is-flipped .card-rotor{transform:rotateY(180deg)}
.flip-ready .flip-open,.flip-ready .flip-close{display:block}
.flip-ready .card-face[inert]{pointer-events:none}
.card-back .app-story{margin-top:20px}
.card-back .story-row{padding:14px 0}
.card-back .story-row h4{margin:5px 0;font-size:13px}
.card-back .story-row p{font-size:11px;line-height:1.85}
.card-back .story-row small{font-size:9px;margin-top:6px}
.card-rotor.no-motion{transition:none}
@media(hover:hover) and (pointer:fine){.flip-open:hover{box-shadow:inset 0 0 0 2px #82a9ed50}.flip-close:hover{background:#eaf2ff}}
@media(max-width:700px){.hero .hello{font-size:16px;margin-top:25px}.hero h1.person-name{font-size:72px;letter-spacing:1px;margin-bottom:18px}.hero-statement{font-size:26px}.card-back{padding:22px}.back-heading h3{font-size:19px}.flip-close{padding:9px;font-size:9px}.card-back .story-row{padding:13px 0}.flip-cue{margin-inline:23px;font-size:10px}.card-front .product-visual{min-height:255px}}
@media(prefers-reduced-motion:reduce){.card-rotor{transition:none}.flip-ready.is-flipped .card-rotor,.flip-ready .card-back{transform:none}.flip-ready .card-face[inert]{visibility:hidden}}
@media print{.flip-ready .card-face{grid-area:auto;transform:none!important;backface-visibility:visible}.flip-ready.is-flipped .card-rotor{transform:none}.flip-ready .card-face[inert]{visibility:visible}.flip-open,.flip-close,.flip-cue{display:none!important}}
/* Align navigation with the shared content grid; shift the map west visually. */
header{padding-inline:max(8vw,calc((100vw - 1180px)/2))}
.hero-bottom,footer{left:max(8vw,calc((100vw - 1180px)/2))}
.hero .map{transform:translateX(-14%) scale(1.3);transform-origin:center}
@media(max-width:1000px){header{padding-inline:7%}.hero-bottom,footer{left:7%}}
@media(max-width:700px){header{padding-inline:7%}.hero .map{transform:translateX(-12%) scale(1.26)}}

.app-website-row{position:relative;z-index:3;margin:0 28px 17px;align-self:flex-start}.app-website{display:inline-flex;gap:20px;align-items:center;color:#2875ed;font-size:12px;font-weight:500;padding:8px 0}.app-website span{font-size:16px}.back-website-row{margin-top:12px;border-top:1px solid #e7edf6;padding-top:7px}.app-website:hover{text-decoration:underline;text-underline-offset:4px}@media(max-width:700px){.app-website-row{margin-left:23px}}
/* Both products share the tallest card's height, including stacked layouts. */
.product-grid{grid-auto-rows:1fr;align-items:stretch}
.flip-card{height:100%;min-width:0}
.flip-card .card-rotor{height:100%}
/* Geographic framing: Baoan → Nanshan → Futian behind the portrait. */
.hero .map{inset:88px 0 0 25%;background-image:url('assets/shenzhen-west-map.webp');background-position:center;background-size:100% auto;background-repeat:no-repeat;transform:none;opacity:.35}
@media(max-width:700px){.hero .map{inset:40% 0 0 0;background-size:100% auto;background-position:center;transform:none;opacity:.38}}

/* Full resume responsibilities and project evidence. */
.resume-points{list-style:none;padding:0;margin:20px 0 0}
.resume-points li{margin:0 0 17px}
.resume-points li:last-child{margin-bottom:0}
.resume-points strong{font-size:12px;font-weight:550;color:#5a7496;display:block;margin-bottom:5px}
.resume-points li p{font-size:12px;line-height:1.95;color:#7b899d;margin:0}
.timeline article{margin-bottom:40px;padding-bottom:30px;border-bottom:1px solid #e8edf4}
.timeline article:last-child{border-bottom:0;padding-bottom:0}
.timeline .resume-points{margin-top:20px}
.project-list-note{font-size:10px;color:#92a2b8;letter-spacing:.6px;margin:0 0 8px}
.project-group{font-size:10px;color:#8ba0bb;letter-spacing:1.5px;margin:36px 0 5px}
.case-body .resume-points{margin:18px 0 24px}
.case-body .resume-points li p{margin:0}
.project-results{display:flex;gap:38px;margin:22px 0 4px}
.project-results strong{display:block;font-size:27px;color:#2c76ed;font-weight:450}
.project-results span{display:block;font-size:10px;color:#93a3ba;margin-top:4px}
@media(min-width:1001px){#experience,#enterprise{overflow:visible}#experience .about-copy,#enterprise .enterprise-statement{position:sticky;top:120px;align-self:start}}
@media(max-width:700px){.resume-points li p{font-size:12px}.timeline article{padding-left:23px;margin-bottom:32px}.project-results{gap:28px}.project-results strong{font-size:25px}}

/* Keep the supplied posters complete at their original shared aspect ratio. */
.work .card-front .product-visual.product-banner{flex:0 0 auto;height:auto;min-height:0;aspect-ratio:40/21;background:none}
.product-banner img{display:block;width:100%;height:100%;object-fit:contain}
.card-front .product-info{flex:1}

/* Compact fronts; details scroll within the same-height reverse face. */
.flip-ready .card-back{position:absolute;inset:0;overflow-y:auto;overscroll-behavior:contain;scrollbar-width:thin;scrollbar-color:#c5d3e7 transparent}
.card-front .product-info{flex:0 0 auto;padding:22px 26px 24px}
.product-info>p{margin:15px 0 17px}
.product-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.product-meta .app-website{font-size:11px;padding:3px 0;gap:9px}
.product-banner .flip-open{inset:auto 14px 14px auto;width:auto;height:auto;max-width:calc(100% - 28px);padding:10px 14px;border:1px solid #ffffffb3;border-radius:999px;background:#ffffffdf;backdrop-filter:blur(12px);color:#3d5e89;box-shadow:0 3px 14px #182e4c13;display:none;align-items:center;gap:10px;font-size:10px;line-height:1.4;transition:transform 160ms var(--ease-out),background-color 160ms ease}
.flip-ready .product-banner .flip-open{display:inline-flex}
.product-banner .flip-open>span:last-child{font-size:17px;line-height:1}
.product-banner .flip-open:active{transform:scale(.97)}
.product-banner .flip-open:focus-visible{outline-offset:-4px}
@media(hover:hover) and (pointer:fine){.product-banner .flip-open:hover{background:#fff;box-shadow:0 3px 16px #182e4c20}}
@media(max-width:700px){.card-front .product-info{padding:20px}.product-banner .flip-open{right:10px;bottom:10px;padding:8px 11px;font-size:9px;gap:7px}.product-meta{gap:10px}.product-info>p{margin:14px 0}.product-meta .app-website{font-size:10px}}
@media(prefers-reduced-motion:reduce){.product-banner .flip-open{transition:none}.product-banner .flip-open:active{transform:none}}
@media print{.flip-ready .card-back{position:static;overflow:visible}.product-banner .flip-open{display:none!important}}

/* Hover/focus reveals the existing section links as a compact directory. */
.section-nav{isolation:isolate}
.section-nav::before{content:"";position:absolute;inset:-45px -12px -14px -160px;border:1px solid #e3eaf4;border-radius:16px;background:#ffffffed;backdrop-filter:blur(16px);box-shadow:0 12px 40px #233c6812;z-index:-1;opacity:0;visibility:hidden;transform:translateX(6px);transition:opacity 180ms var(--ease-out),transform 180ms var(--ease-out),visibility 180ms;pointer-events:none}
.section-nav a{position:relative}
.nav-directory-title,.nav-directory-label{position:absolute;right:24px;width:134px;opacity:0;visibility:hidden;transform:translateX(6px);transition:opacity 180ms var(--ease-out),transform 180ms var(--ease-out),visibility 180ms;pointer-events:none}
.nav-directory-title{top:-28px;padding-left:9px;font-size:9px;letter-spacing:1.6px;color:#9aa8bb}
.nav-directory-label{top:-5px;display:flex;align-items:center;gap:12px;height:30px;padding:0 9px;border-radius:7px;color:#6e7f96;font-size:12px;white-space:nowrap}
.nav-directory-label small{font-size:9px;color:#9cabc0;letter-spacing:.8px}
.section-nav a.active .nav-directory-label{background:#edf4ff;color:#2671e8}
.section-nav a.active .nav-directory-label small{color:#6995d7}
.section-nav:has(a:focus-visible)::before,.section-nav:has(a:focus-visible) .nav-directory-label,.section-nav:has(a:focus-visible) .nav-directory-title{opacity:1;visibility:visible;transform:none;pointer-events:auto}
@media(hover:hover) and (pointer:fine){.section-nav:hover::before,.section-nav:hover .nav-directory-label,.section-nav:hover .nav-directory-title{opacity:1;visibility:visible;transform:none;pointer-events:auto}.section-nav a:hover .nav-directory-label{background:#f0f5fc;color:#2671e8}}
@media(prefers-reduced-motion:reduce){.section-nav::before,.nav-directory-label,.nav-directory-title{transform:none;transition:opacity 120ms ease,visibility 120ms}}

/* Shared columns keep company and project experience aligned. */
@media(min-width:701px){
  .about-grid,.enterprise-layout{grid-template-columns:minmax(0,.85fr) minmax(0,1.6fr);column-gap:80px}
  .timeline{margin-left:0}
  .about-grid>*,.enterprise-layout>*{min-width:0}
}
@media(min-width:701px) and (max-width:1000px){
  .about-grid,.enterprise-layout{column-gap:45px}
}

/* Each project starts with a short introduction and an explicit disclosure. */
.project-case{padding:25px 0;border-bottom:1px solid #dfe6f0}
.case-heading{display:flex;align-items:flex-start;gap:20px}
.case-heading strong{font-size:18px;font-weight:500;display:block}
.case-heading small{display:block;font-size:10px;color:#99a6b6;margin-top:10px}
.case-preview{padding-left:34px;color:#7f8ea2;font-size:12px;line-height:1.95}
.case-preview p{margin:16px 0 8px}
.cases .case-expand{border:0}
.cases .case-expand>summary{display:flex;width:fit-content;gap:8px;padding:6px 0;margin-left:34px;color:#2874ed;font-size:12px;cursor:pointer}
.case-expand .read-less,.case-expand[open] .read-more{display:none}
.case-expand[open] .read-less{display:inline}
.case-expand[open] .expand-mark{transform:rotate(45deg)}
.cases .case-expand .case-body{padding-top:4px;padding-bottom:0}
@media(max-width:700px){.case-heading{gap:15px}.case-heading strong{font-size:16px}.case-preview{padding-left:27px}.cases .case-expand>summary{margin-left:27px}}

/* Put the native disclosure control after the expanded project content. */
.cases .case-expand[open]{position:relative;padding-bottom:38px}
.cases .case-expand[open]>summary{position:absolute;bottom:0;left:34px;margin-left:0}
@media(max-width:700px){.cases .case-expand[open]>summary{left:27px}}

/* Company responsibilities use the same preview/disclosure pattern. */
.company-expand>summary{display:flex;width:fit-content;align-items:center;gap:8px;padding:6px 0;margin-top:10px;color:#2874ed;font-size:12px;list-style:none;cursor:pointer}
.company-expand .read-less,.company-expand[open] .read-more{display:none}
.company-expand[open] .read-less{display:inline}
.company-expand[open] .expand-mark{transform:rotate(45deg)}
.company-expand[open]{position:relative;padding-bottom:38px}
.company-expand[open]>summary{position:absolute;bottom:0;left:0;margin-top:0}
.timeline .company-expand .resume-points{margin-top:17px}

.email-row{display:flex;justify-content:center;align-items:center;gap:14px;margin:10px 0 26px;flex-wrap:wrap}
.email-row .email{margin:0}
.copy-email-inline{font:inherit;font-size:11px;color:#52749e;border:1px solid #dce5f1;background:#ffffffb3;border-radius:999px;padding:7px 12px;cursor:pointer}
#wechat-dialog{width:min(390px,calc(100vw - 40px));border:1px solid #e2e9f3;border-radius:24px;padding:34px 28px 28px;text-align:center;color:#182537;background:#fff;box-shadow:0 24px 90px #172d5130}
#wechat-dialog::backdrop{background:#13243d60;backdrop-filter:blur(5px)}
#wechat-dialog .eyebrow{display:block;margin:8px 0 16px;font-size:9px}
#wechat-title{font-size:26px;margin:0 0 12px;letter-spacing:-.6px}
.wechat-intro{font-size:12px;color:#7f8ea2;margin:0}
.wechat-close{position:absolute;right:14px;top:12px;width:32px;height:32px;border:0;border-radius:50%;background:#f2f5f9;color:#63748d;font-size:22px;cursor:pointer}
.wechat-qr{display:block;width:min(280px,100%);height:auto;margin:18px auto 8px}
.wechat-save{font-size:12px;color:#2874ed;display:inline-block;padding:10px}
@media(max-width:700px){.email-row{gap:9px}.email-row .email{font-size:18px}.copy-email-inline{font-size:10px;padding:6px 9px}}

/* Small utility action beside the email address. */
.copy-email-inline{font-size:10px;padding:4px 9px;line-height:1.4}
.email-row{gap:10px}
@media(max-width:700px){.copy-email-inline{font-size:9px;padding:4px 8px}}

.contact-actions{flex-wrap:wrap}
.contact-phone{white-space:nowrap;font-variant-numeric:tabular-nums}

#phone-dialog{width:min(390px,calc(100vw - 40px));border:1px solid #e2e9f3;border-radius:24px;padding:38px 28px 32px;text-align:center;color:#182537;background:#fff;box-shadow:0 24px 90px #172d5130}
#phone-dialog::backdrop{background:#13243d60;backdrop-filter:blur(5px)}
#phone-dialog .eyebrow{display:block;margin:8px 0 16px;font-size:9px}
#phone-title{font-size:26px;margin:0;letter-spacing:-.6px}
.phone-number{font-size:26px;color:#4f6687;font-variant-numeric:tabular-nums;white-space:nowrap;margin:26px 0}

.nav-avatar{display:block;width:36px;height:36px;object-fit:cover;border-radius:50%;border:2px solid #fff;box-shadow:0 2px 8px #7892b522;margin-right:5px}
@media(max-width:700px){.nav-avatar{width:30px;height:30px;margin-right:2px}}

img,.product-banner,.portrait,.contact-avatar,.map{-webkit-user-drag:none;-webkit-touch-callout:none;user-select:none}

.contact-actions .button{gap:9px}
.contact-action-icon{display:block;width:18px;height:18px;flex-shrink:0}
@media(max-width:700px){.contact-action-icon{width:16px;height:16px}}

.hero-actions .button,.hero-actions .text-link{display:inline-flex;align-items:center;gap:9px}

/* Shared responsibility headings for company and project experience. */
#experience .resume-points strong,#enterprise .resume-points strong{position:relative;padding-left:11px;font-size:14px;line-height:1.5;font-weight:600;color:#243b59;margin-bottom:6px}
#experience .resume-points strong::before,#enterprise .resume-points strong::before{content:"";position:absolute;left:0;top:.25em;width:3px;height:1em;border-radius:2px;background:#2c76ed}
#experience .resume-points li,#enterprise .resume-points li{margin-bottom:24px}
#experience .resume-points li:last-child,#enterprise .resume-points li:last-child{margin-bottom:0}
.timeline .company-expand .resume-points{margin-top:24px}

/* Three contact methods, followed by a dedicated resume action. */
.contact{padding-top:110px;padding-bottom:125px}
.contact .contact-avatar{margin:22px auto 24px}
.contact h2{line-height:1.3}
.contact-inner>p:not(.eyebrow){margin:20px 0 28px;line-height:1.8}
.contact-actions{gap:12px}
.contact-actions .button{min-width:132px;justify-content:center;padding:14px 20px}
.resume-action{display:flex;justify-content:center;margin-top:20px}
.resume-action .button{gap:9px;padding:14px 24px}
#email-dialog{width:min(410px,calc(100vw - 40px));border:1px solid #e2e9f3;border-radius:24px;padding:38px 24px 22px;text-align:center;color:#182537;background:#fff;box-shadow:0 24px 90px #172d5130}
#email-dialog::backdrop{background:#13243d60;backdrop-filter:blur(5px)}
#email-dialog .eyebrow{display:block;margin:8px 0 16px;font-size:9px}
#email-title{font-size:26px;margin:0;letter-spacing:-.6px}
#email-dialog .email-row{margin:26px 0 0}
#email-dialog .email{font-size:20px}
#email-dialog .copy-status{margin-top:12px}
@media(max-width:700px){
 .contact{padding:95px 0 120px}
 .contact .contact-avatar{margin:18px auto 20px}
 .contact-inner>p:not(.eyebrow){margin:18px 0 24px}
 .contact-actions{gap:8px;flex-wrap:nowrap}
 .contact-actions .button{min-width:0;gap:6px;padding:12px 10px;font-size:11px}
 .resume-action{margin-top:18px}
 #email-dialog .email{font-size:18px}
}

/* Matching email and phone dialog actions. */
#email-dialog,#phone-dialog{width:min(410px,calc(100vw - 40px));padding:38px 24px 32px}
#email-dialog .email-row,.phone-number{margin:26px 0}
#email-dialog .email,.phone-number{font-size:22px;color:#4f6687;line-height:1.5}
.dialog-action{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-width:148px;padding:14px 24px;font-size:14px}
#email-dialog .copy-status:empty{display:none}
@media(max-width:700px){#email-dialog .email,.phone-number{font-size:18px}}

/* Contact: a spacious editorial closing section. */
.contact{min-height:100svh;padding:150px 0 160px;text-align:left}
.contact-inner{display:grid;grid-template-columns:1.35fr 1fr;gap:clamp(48px,7vw,112px);align-items:center}
.contact .eyebrow{justify-content:flex-start;margin:0 0 32px}
.contact .contact-avatar{width:76px;height:76px;margin:0 0 28px}
.contact h2{font-size:clamp(38px,3.8vw,60px);line-height:1.35;letter-spacing:-1.7px;white-space:nowrap}
.contact-description{font-size:15px;line-height:1.9;color:#8292aa;margin:24px 0 0}
.contact-options{padding:30px 0 30px 40px;border-left:1px solid #dce5f2}
.contact-options-label{font-size:13px;letter-spacing:2px;color:#8292aa;margin:0 0 22px}
.contact-actions{display:grid;grid-template-columns:1fr;gap:12px}
.contact-actions .button{width:100%;min-width:0;justify-content:flex-start;padding:19px 24px;gap:14px;font-size:15px;border-radius:12px}
.contact-actions .button::after{content:'↗';margin-left:auto;color:#93a7c3;font-size:17px}
.resume-action{justify-content:stretch;margin-top:24px;padding-top:24px;border-top:1px solid #dce5f2}
.resume-action .button{width:100%;justify-content:center;padding:18px 24px;gap:12px;font-size:14px;border-radius:12px}
.contact-glow{left:30%;width:1000px;opacity:.8}
.contact footer{left:50%;transform:translateX(-50%)}
@media(max-width:1000px) and (min-width:701px){.contact-inner{gap:36px;grid-template-columns:1.2fr 1fr}.contact-options{padding-left:28px}.contact h2{font-size:36px}}
@media(max-width:700px){
 .contact{padding:110px 0 130px}
 .contact-inner{grid-template-columns:1fr;gap:36px;max-width:450px;text-align:center}
 .contact .eyebrow{justify-content:center;margin-bottom:24px}
 .contact .contact-avatar{margin:0 auto 22px;width:64px;height:64px}
 .contact h2{font-size:clamp(30px,8vw,42px);letter-spacing:-1px}
 .contact-description{font-size:12px;margin-top:18px}
 .contact-description br{display:none}
 .contact-options{border-left:0;padding:0}
 .contact-options-label{display:none}
 .contact-actions{grid-template-columns:repeat(3,1fr);gap:8px}
 .contact-actions .button{flex-direction:column;padding:16px 6px;font-size:11px;gap:10px}
 .contact-actions .button::after{display:none}
 .resume-action{margin-top:18px;padding-top:18px}
 .resume-action .button{padding:15px 20px;font-size:13px}
}