/* Ivy Hu — Clear Horizon design system (see DESIGN.md) */
:root{
  --paper:#F7F3E8; --paper-2:#EEE8DA; --line:#DDD5C4;
  --ink:#142631; --ink-soft:#4F4A42;
  --cobalt:#315CFF; --cobalt-deep:#2A4BDB;
  --sky:#50B9E2; --sky-deep:#1A6E92; --sky-tint:#DDF1FA;
  --vermilion:#F05A47; --vermilion-deep:#C9362A; --yellow:#F2C94C;
  --on-cobalt:#F7F3E8;
  --band:#315CFF; --on-band:#F7F3E8; /* brand band: same in light & dark */
  --serif:"Newsreader","Noto Serif TC",Georgia,serif;
  --sans:"Source Sans 3","Noto Sans TC",system-ui,-apple-system,sans-serif;
  --note:"LXGW WenKai TC","Noto Serif TC",serif;
  --max:1200px; --read:660px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:18px;line-height:1.85;letter-spacing:.02em;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:var(--cobalt-deep);text-decoration:none}
a:hover{text-decoration:underline;text-underline-offset:4px}
.wrap{max-width:var(--max);margin:0 auto;padding:0 40px}
@media (max-width:720px){.wrap{padding:0 20px}body{font-size:17px}.display{font-size:32px}}

/* nav */
.nav{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--paper) 92%,transparent);backdrop-filter:blur(6px);border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:60px;gap:16px}
.brand{font-family:var(--serif);font-size:20px;color:var(--ink);font-weight:500;letter-spacing:.01em}
.brand b{color:var(--cobalt);font-weight:500}
.nav ul{display:flex;gap:24px;list-style:none;font-size:15px}
.nav ul a{color:var(--ink-soft)}
.nav ul a[aria-current]{color:var(--ink);font-weight:600}
@media (max-width:560px){.nav ul{gap:14px;font-size:14px}}

/* type */
.label{font-size:12.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-soft);font-weight:500}
h1,h2,.serif{font-family:var(--serif);font-weight:500;letter-spacing:.01em}
.display{text-wrap:balance;font-family:var(--serif);font-size:clamp(32px,6.2vw,72px);line-height:1.18;font-weight:500;color:var(--cobalt)}
h2{font-size:clamp(26px,3.4vw,36px);line-height:1.35;margin:18px 0 28px}
h3{font-size:20px;line-height:1.5;font-weight:600}
p+p{margin-top:20px}
.lead{font-size:20px;color:var(--ink-soft);max-width:var(--read)}
.read{max-width:var(--read)}
.hl{background:linear-gradient(transparent 42%,var(--yellow) 42%);padding:0 2px;color:#142631}
.spark{color:var(--vermilion-deep)}
.arrow{color:var(--cobalt-deep);font-weight:500;white-space:nowrap}
.arrow::after{content:" →";display:inline-block;transition:transform .3s ease}
.arrow:hover::after{transform:translateX(4px)}
.muted{color:var(--ink-soft)}
.small{font-size:15px;line-height:1.7}

/* sections */
section{padding:120px 0;border-top:1px solid var(--line)}
section.first{border-top:0;padding-top:96px}
@media (max-width:720px){section{padding:80px 0}section.first{padding-top:56px}}
.offset{margin-left:8.33%}
@media (max-width:900px){.offset{margin-left:0}}

/* blocks */
.band-cobalt{background:var(--band);color:var(--on-band)}
.band-cobalt .label{color:var(--on-band)}
.band-cobalt h2,.band-cobalt .display,.band-cobalt .stat b,.band-cobalt .stat > span{color:var(--on-band)}
.system{background:var(--sky-tint);padding:32px;border-radius:2px}
.note{background:var(--paper-2);padding:24px 28px;border-radius:2px;font-size:16px;line-height:1.8}
.quote{font-family:var(--serif);font-size:clamp(24px,3vw,32px);line-height:1.45;border-left:2px solid var(--cobalt);padding-left:24px}
.grid{display:grid;gap:40px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
@media (max-width:900px){.g3{grid-template-columns:1fr 1fr}}
@media (max-width:720px){.g2,.g3{grid-template-columns:1fr}}
.stat b{display:block;font-family:var(--serif);font-size:44px;line-height:1.1;color:var(--cobalt);font-weight:500}
.stat > span{font-size:15px;color:var(--ink-soft);line-height:1.6;display:block;margin-top:8px}
.card-line{border-top:1px solid var(--line);padding-top:20px}
.num{font-size:13px;letter-spacing:.14em;color:var(--sky-deep);font-weight:600}
.tag{display:inline-block;font-size:13px;color:var(--ink-soft);border:1px solid var(--line);border-radius:2px;padding:1px 8px;margin:0 6px 6px 0;line-height:1.6}
table{width:100%;border-collapse:collapse;font-size:16px;line-height:1.7}
th,td{text-align:left;padding:14px 12px 14px 0;border-bottom:1px solid var(--line);vertical-align:top}
th{font-size:12.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-soft);font-weight:500}
td.yr{font-family:var(--serif);color:var(--cobalt);white-space:nowrap;font-size:18px}
.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}
.btn{display:inline-block;background:var(--ink);color:var(--paper);padding:12px 22px;border-radius:2px;font-weight:500;font-size:16px}
.btn:hover{text-decoration:none;opacity:.9}
footer{border-top:1px solid var(--line);padding:48px 0 64px;font-size:14px;color:var(--ink-soft)}

/* motion */
.reveal{opacity:0;transform:translateY(8px);transition:opacity .5s ease-out,transform .5s ease-out}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}html{scroll-behavior:auto}}


.lang-toggle{font-size:14px;color:var(--ink-soft);border:1px solid var(--line);border-radius:2px;padding:2px 10px;line-height:1.6;letter-spacing:.04em}
.lang-toggle:hover{color:var(--ink);text-decoration:none;border-color:var(--ink-soft)}

/* works page */
.filters{display:flex;flex-wrap:wrap;gap:8px;margin:40px 0 48px}
.filters button{font:inherit;font-size:15px;background:transparent;color:var(--ink-soft);border:1px solid var(--line);border-radius:2px;padding:6px 14px;cursor:pointer}
.filters button[aria-pressed="true"]{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.works{display:grid;grid-template-columns:repeat(3,1fr);gap:48px 32px}
@media (max-width:900px){.works{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.works{grid-template-columns:1fr}}
.work{display:block;align-self:start;cursor:pointer;background:none;border:0;text-align:left;font:inherit;color:inherit;padding:0}
.work .thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--paper-2);border:1px solid var(--line)}
.work .thumb img{width:100%;height:100%;object-fit:cover;object-position:top;transition:transform .5s ease-out}
.work:hover .thumb img,.work:focus-visible .thumb img{transform:scale(1.02)}
.work .badge{position:absolute;left:10px;bottom:10px;background:var(--paper);color:var(--ink);font-size:12px;padding:2px 8px;border-radius:2px;letter-spacing:.06em}
.work .meta{font-size:13px;letter-spacing:.08em;color:var(--sky-deep);font-weight:600;margin-top:16px}
.work h3{font-weight:600;font-size:19px;line-height:1.45;margin-top:4px}
.work p{font-size:15px;line-height:1.7;color:var(--ink-soft);margin-top:6px}
.placeholder{display:flex;align-items:center;justify-content:center;height:100%;background:var(--sky-tint);color:var(--sky-deep);font-size:15px;text-align:center;padding:16px}
/* viewer */
.viewer{position:fixed;inset:0;z-index:50;background:#0B141A;display:none;flex-direction:column}
.viewer.open{display:flex}
.vbar{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 20px;color:#EEE9DD}
.vbar h4{font-family:var(--serif);font-weight:500;font-size:18px;line-height:1.4}
.vbar .sub{font-size:13px;color:#A8A296}
.vbtn{white-space:nowrap;flex-shrink:0;font:inherit;background:transparent;color:#EEE9DD;border:1px solid #3A4A54;border-radius:2px;padding:6px 12px;cursor:pointer;font-size:15px}
.vbtn:hover{border-color:#EEE9DD}
.vstage{flex:1;display:flex;align-items:center;justify-content:center;padding:8px 20px;min-height:0;position:relative}
.vstage img{max-width:100%;max-height:100%;object-fit:contain;background:#fff}
.vstage.tall{overflow:auto;align-items:flex-start}
.vstage.tall img{max-height:none;width:min(820px,100%)}
.vstage iframe{width:min(1100px,100%);aspect-ratio:16/9;border:0;background:#000}
.vstage iframe.short{width:auto;height:min(100%,780px);aspect-ratio:9/16}
.vnav{display:flex;align-items:center;justify-content:center;gap:16px;padding:12px 20px 18px;color:#EEE9DD;font-size:14px}
.vside{position:absolute;top:50%;transform:translateY(-50%);font-size:28px;line-height:1;padding:14px 12px}
.vside.prev{left:8px}.vside.next{right:8px}
.vdesc{max-width:820px;margin:0 auto;color:#C9C3B6;font-size:14px;line-height:1.7;padding:0 20px 8px;text-align:center}
@media (max-width:560px){.vside{display:none}}
html[lang="en"] body{line-height:1.65;letter-spacing:0}
html[lang="en"] .lead{line-height:1.7}

/* strengths domains */
.domains{display:grid;grid-template-columns:repeat(2,minmax(0,360px));gap:16px;margin-top:32px}
@media (max-width:560px){.domains{grid-template-columns:1fr}}
.domain{border:1px solid var(--line);padding:18px 18px 16px;border-radius:2px}
.domain.on{background:var(--sky-tint);border-color:var(--sky)}
.domain .cnt{font-family:var(--serif);font-size:32px;line-height:1;color:var(--cobalt)}
.domain:not(.on) .cnt{color:var(--ink-soft);opacity:.6}
.domain h4{font-size:16px;font-weight:600;margin:10px 0 4px}
.domain p{font-size:14px;line-height:1.6;color:var(--ink-soft)}
.dtag{display:inline-block;font-size:12px;color:var(--sky-deep);border:1px solid var(--sky);border-radius:2px;padding:0 6px;margin-top:4px;letter-spacing:.04em}

/* event journey */
.journey ol{list-style:none;display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:12px;counter-reset:j}
@media (max-width:900px){.journey ol{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.journey ol{grid-template-columns:1fr}}
.journey li{border-top:2px solid var(--cobalt);padding-top:12px;display:flex;flex-direction:column;gap:6px;counter-increment:j}
.journey li b::before{content:counter(j) ". ";color:var(--cobalt)}
.journey li span{font-size:15px;line-height:1.6;color:var(--ink-soft)}
.journey li .arrow{font-size:15px;margin-top:auto}

/* career timeline */
.tl{margin-top:64px}
.tl ol{list-style:none;display:grid;grid-template-columns:repeat(6,1fr);gap:16px;margin-top:16px}
@media (max-width:1000px){.tl ol{grid-template-columns:repeat(3,1fr)}}
@media (max-width:560px){.tl ol{grid-template-columns:1fr}}
.tl li{border-top:2px solid var(--cobalt);padding-top:12px;display:flex;flex-direction:column;gap:6px}
.tl li b{font-family:var(--serif);color:var(--cobalt);font-size:20px;font-weight:400}
.tl li span{font-size:15px;line-height:1.6;color:var(--ink-soft)}
table.lines{min-width:760px}

/* testimonials */
.voices{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:40px}
@media (max-width:900px){.voices{grid-template-columns:1fr}}
.voice{margin:0;border-left:2px solid var(--cobalt);padding:4px 0 4px 20px;display:flex;flex-direction:column;gap:14px}
.voice blockquote{margin:0;font-family:var(--serif);font-size:19px;line-height:1.6;color:var(--ink)}
.voice blockquote[lang=en]{font-size:17px}
.voice figcaption{font-size:13px;letter-spacing:.04em;color:var(--ink-soft)}
.voices-sm{margin-top:8px;padding-top:24px;border-top:1px solid var(--line)}
.voices-sm .voice blockquote{font-size:16px}

/* works page: anchors, capabilities, cases, system */
.anchors{display:flex;flex-wrap:wrap;gap:8px;margin-top:32px}
.anchors a{font-size:14px;padding:6px 14px;border:1px solid var(--line);border-radius:999px;color:var(--ink-soft);text-decoration:none}
.anchors a:hover{border-color:var(--cobalt);color:var(--cobalt)}
section.tint{background:var(--paper-2)}
.roles{display:grid;grid-template-columns:1fr 1fr 1.15fr;gap:24px;margin-top:40px;align-items:start}
@media (max-width:980px){.roles{grid-template-columns:1fr}}
.role{--rc:var(--cobalt);border:1px solid var(--rc);background:var(--paper)}
.role.r2{--rc:var(--vermilion-deep)}.role.r3{--rc:var(--sky-deep)}
.role-h{background:var(--rc);color:#fff;padding:24px 24px 22px}
.role-sub{font-size:13px;letter-spacing:.08em;opacity:.85;margin:0}
.role-h h2{color:#fff;font-size:clamp(28px,3vw,36px);margin:6px 0 10px;line-height:1.25}
.role-st{font-size:15.5px;line-height:1.6;margin:0;opacity:.95}
.role-b{padding:8px 16px 12px}
.cap{border-bottom:1px solid var(--line)}
.cap:last-child{border-bottom:0}
.cap summary{list-style:none;cursor:pointer;display:flex;gap:14px;align-items:flex-start;padding:14px 4px}
.cap summary::-webkit-details-marker{display:none}
.cap .cn{flex:none;width:30px;height:30px;border-radius:50%;background:var(--rc);color:#fff;font-weight:600;font-size:15px;display:flex;align-items:center;justify-content:center;margin-top:2px}
.cap .ct{display:flex;flex-direction:column;flex:1}
.cap .ct b{font-size:17px;font-weight:600;line-height:1.5}
.cap .ct i{font-style:normal;font-size:14.5px;color:var(--ink-soft);line-height:1.6}
.cap summary::after{content:"+";flex:none;color:var(--rc);font-size:22px;line-height:1.3}
.cap[open] summary::after{content:"−"}
.cap .cd{padding:0 4px 16px 44px}
.cap .cd p{font-size:15px;line-height:1.75;color:var(--ink-soft);margin:0}
.cap .cd .arrow{display:inline-block;margin-top:10px;font-size:14px}
.cap:target{background:color-mix(in srgb,var(--rc) 8%,transparent)}
.loop{list-style:none;display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:32px;padding:0}
@media (max-width:900px){.loop{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.loop{grid-template-columns:1fr}}
.loop li{background:var(--paper);border-top:3px solid var(--cobalt);padding:18px 18px 16px;display:flex;flex-direction:column;gap:8px;position:relative}
.loop li b{font-family:var(--serif);font-size:32px;color:var(--cobalt);font-weight:500;line-height:1}
.loop li span{font-size:15px;line-height:1.6;color:var(--ink-soft)}
.loop li .arrow{font-size:14px;margin-top:auto}
.case{background:var(--paper);padding:32px;margin-top:32px;scroll-margin-top:80px}
@media (max-width:560px){.case{padding:22px}}
.case h3{font-family:var(--serif);font-size:clamp(22px,2.4vw,28px);font-weight:500;line-height:1.4;margin:8px 0 14px}
.case>p{max-width:var(--read);font-size:16px;line-height:1.8;color:var(--ink-soft)}
.case-lead{color:var(--ink)!important;font-weight:500;border-left:2px solid var(--cobalt);padding-left:14px}
.case-end{font-family:var(--serif);font-size:20px;color:var(--ink)!important;margin-top:24px}
.utl{margin-top:24px}
.utl-band{display:flex;flex-wrap:wrap;gap:6px 18px;background:var(--sky-tint);color:var(--sky-deep);font-size:13px;padding:8px 14px;letter-spacing:.02em}
.utl-band span:first-child{font-weight:600}
.utl ol{list-style:none;display:grid;grid-template-columns:repeat(7,1fr);gap:12px;padding:0;margin-top:16px}
@media (max-width:1100px){.utl ol{grid-template-columns:repeat(4,1fr)}}
@media (max-width:720px){.utl ol{grid-template-columns:1fr 1fr}}
@media (max-width:480px){.utl ol{grid-template-columns:1fr}}
.utl li{border-top:2px solid var(--cobalt);padding-top:10px;display:flex;flex-direction:column;gap:4px}
.utl li b{font-family:var(--serif);color:var(--cobalt);font-weight:500;font-size:17px}
.utl li i{font-style:normal;font-weight:600;font-size:15px}
.utl li span{font-size:14px;line-height:1.6;color:var(--ink-soft)}
.utl li .arrow{font-size:13px;margin-top:auto}
.cols2{display:grid;grid-template-columns:1fr 1fr;gap:32px;margin-top:20px}
@media (max-width:720px){.cols2{grid-template-columns:1fr}}
ul.tick{list-style:none;padding:0;margin:10px 0 0;display:flex;flex-direction:column;gap:8px}
ul.tick li{position:relative;padding-left:18px;font-size:15px;line-height:1.7;color:var(--ink-soft)}
ul.tick li::before{content:"";position:absolute;left:0;top:.75em;width:8px;height:2px;background:var(--cobalt)}
ul.tick li b{color:var(--ink);margin-right:8px}
.chain{list-style:none;padding:0;margin:24px 0 0;display:flex;flex-direction:column;gap:6px;max-width:520px}
.chain li{background:var(--sky-tint);color:var(--ink);padding:10px 16px;font-size:15px;position:relative}
.chain li small{display:block;color:var(--ink-soft);font-size:13px;margin-top:2px}
.chain li:not(:last-child)::after{content:"↓";position:absolute;right:14px;top:50%;transform:translateY(-50%);color:var(--cobalt)}
.chain.row{flex-direction:row;flex-wrap:wrap;max-width:none}
.chain.row li:not(:last-child)::after{content:"→";right:-12px;z-index:1}
.chain.row li{margin-right:10px}
.qa{margin-top:24px;display:flex;flex-direction:column;gap:12px;max-width:var(--read)}
.qa>p{font-size:16px;line-height:1.8;color:var(--ink-soft)}
.qa>p>b{display:inline-block;min-width:4.5em;color:var(--cobalt)}
.stats-mini{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:24px}
@media (max-width:720px){.stats-mini{grid-template-columns:1fr 1fr}}
.stats-mini b{display:block;font-family:var(--serif);font-size:30px;color:var(--cobalt);font-weight:500}
.stats-mini span{font-size:14px;line-height:1.6;color:var(--ink-soft)}
.sys{margin-top:40px}
.sys-top{background:var(--ink);color:var(--paper);padding:14px 20px;display:flex;flex-wrap:wrap;gap:12px;align-items:baseline}
.sys-top b{font-size:17px}
.sys-top span{font-size:15px;opacity:.85}
.sys ol{list-style:none;padding:0;margin:12px 0 0;display:grid;grid-template-columns:repeat(3,1fr);gap:12px;counter-reset:s}
@media (max-width:900px){.sys ol{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.sys ol{grid-template-columns:1fr}}
.sys li{border:1px solid var(--line);padding:16px 18px;display:flex;flex-direction:column;gap:4px;counter-increment:s}
.sys li b::before{content:counter(s) ". ";color:var(--cobalt)}
.sys li b{font-size:17px}
.sys li i{font-style:normal;font-size:14px;color:var(--cobalt)}
.sys li span{font-size:15px;line-height:1.6;color:var(--ink-soft)}
.sys-next{margin-top:12px;border:1px dashed var(--cobalt);padding:12px 18px;font-size:15px;color:var(--ink-soft)}
.sys-next b{color:var(--cobalt);margin-right:12px}


/* AI skill map */
.sm-legend{display:flex;flex-wrap:wrap;gap:8px 24px;margin-top:24px;font-size:14px;color:var(--ink-soft)}
.sm-legend span{display:inline-flex;align-items:center;gap:8px}
.lg{display:inline-block;width:28px;height:0;border-top:2px solid var(--cobalt)}
.lg.dash{border-top-style:dashed}
.lg.box{width:18px;height:12px;border:1px solid var(--ink);background:var(--paper)}
.sm-wrap{display:flex;flex-direction:column;gap:12px;margin-top:20px}
.sm-scroll{background:var(--paper);border:1px solid var(--line);overflow-x:auto;-webkit-overflow-scrolling:touch}
.sm-svg{display:block;width:100%;min-width:900px;height:auto;font-family:inherit}
.sm-panel{background:var(--paper);border:1px solid var(--line);border-left:3px solid var(--cobalt);padding:16px 20px;min-height:120px}
.sm-panel h3{font-size:20px;font-weight:600;margin:6px 0 8px}
.sm-panel p{font-size:15px;line-height:1.7;margin-top:6px}
.sm-panel .arrow{display:inline-block;margin-top:10px;font-size:14px}
.sm-mob{display:none;margin-top:8px}
@media (max-width:900px){.sm-mob{display:block}}
.sm-svg .r1{--rc:var(--cobalt)}.sm-svg .r2{--rc:var(--vermilion-deep)}.sm-svg .r3{--rc:var(--sky-deep)}
.sm-tree path,.sm-tree line{fill:none;stroke:var(--line);stroke-width:1.5}
.sm-tree line.spine{stroke-dasharray:2 4}
.sm-edge{fill:none;stroke:var(--rc,var(--cobalt));stroke-width:1.8;opacity:0;pointer-events:none;transition:opacity .2s}
.sm-edge.dash{stroke-dasharray:5 4}
.sm-arrowhead{fill:var(--ink-soft)}
.sm-edge.on{opacity:.95}
.sm-node{cursor:pointer;outline:none}
.sm-node rect{fill:var(--paper);stroke:var(--rc);stroke-width:1;transition:all .2s}
.sm-node text{font-size:13.5px;fill:var(--ink);pointer-events:none}
.sm-node.en text{font-size:12.5px}
.sm-node.hub rect{fill:var(--rc);stroke:var(--rc)}
.sm-node.hub text{fill:#fff;font-weight:600;font-size:17px}
.sm-node.capn rect{fill:color-mix(in srgb,var(--rc) 12%,var(--paper));stroke:var(--rc);stroke-width:1.5}
.sm-node.capn text{font-weight:600;fill:var(--ink)}
.sm-node.gap rect{fill:transparent;stroke-dasharray:4 3}
.sm-node.gap text{fill:var(--ink-soft)}
.sm-node:hover rect,.sm-node:focus-visible rect{stroke-width:2.5}
.sm-svg.focus .sm-node:not(.lit){opacity:.3}
.sm-node.cur rect{stroke-width:3}