html{color-scheme:light only}
:root{
  --paper:#F5F7FA;
  --sheet:#FFFFFF;
  --ink:#152238;
  --ink-2:#4A5568;
  --line:#CBD3DF;
  --blue:#1F2D8E;
  --blue-soft:#E6F4FD;
  --gold:#E07A16;
  --gold-soft:#FDEEDC;
  --serif:"Noto Serif TC","Songti TC","PMingLiU",serif;
  --sans:"IBM Plex Sans","Noto Sans TC","PingFang TC","Microsoft JhengHei",sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:17px;line-height:1.7;-webkit-font-smoothing:antialiased}
img,svg{max-width:100%}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline;text-underline-offset:3px}
:focus-visible{outline:3px solid var(--gold);outline-offset:3px}
h1,h2,h3{font-family:var(--serif);font-weight:700;line-height:1.25;letter-spacing:.01em}
.wrap{max-width:1180px;margin:0 auto;padding:0 clamp(20px,4vw,48px)}
.en{color:var(--ink-2);font-family:var(--sans)}
section{padding:clamp(56px,8vw,104px) 0;border-top:1px solid var(--line)}
section h2{font-size:clamp(28px,3.4vw,40px);margin-bottom:8px}
section .sub{color:var(--ink-2);font-size:15px;margin-bottom:40px;font-style:italic}
.grid{display:grid;gap:24px}

/* nav */
header{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--paper) 88%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:68px;gap:24px}
.brand{display:flex;align-items:center;gap:12px;color:var(--ink);font-family:var(--serif);font-weight:700;font-size:19px;white-space:nowrap}
.brand small{display:block;font-family:var(--sans);font-weight:500;font-size:11px;color:var(--ink-2);letter-spacing:.06em}
.logo img{height:46px;width:auto}
.logo.foot img{height:34px}
@media (max-width:860px){.logo img{height:38px}}
.brand .mark{width:36px;height:36px;border:2px solid var(--ink);border-radius:50%;display:grid;place-items:center;font-family:var(--sans);font-size:11px;font-weight:600;letter-spacing:.04em}
.nav nav{display:flex;gap:28px;font-size:15px;font-weight:500}
.nav nav a{color:var(--ink);padding:6px 0;border-bottom:2px solid transparent}
.nav nav a:hover{text-decoration:none;border-bottom-color:var(--blue)}
.nav .lang{font-size:13px;color:var(--ink-2);border:1px solid var(--line);padding:5px 10px;border-radius:4px}
.menu-btn{display:none;background:none;border:1px solid var(--line);border-radius:6px;padding:6px 10px;color:var(--ink);font:inherit;font-size:14px}
@media (max-width:860px){
  .nav nav{display:none;position:absolute;left:0;right:0;top:68px;background:var(--paper);border-bottom:1px solid var(--line);flex-direction:column;gap:0;padding:8px 20px 16px}
  .nav nav a{padding:12px 0;border-bottom:1px solid var(--line)}
  .nav.open nav{display:flex}
  .menu-btn{display:block}
  .nav .lang{display:none}
}

/* hero */
.hero{padding:clamp(48px,7vw,96px) 0 clamp(40px,6vw,80px);border-top:0}
.hero .grid{grid-template-columns:1.05fr .95fr;align-items:center;gap:clamp(32px,5vw,72px)}
.hero h1{font-size:clamp(34px,5vw,60px);margin-bottom:20px}
.hero h1 span{display:block;font-family:var(--sans);font-weight:500;font-size:.4em;color:var(--ink-2);margin-top:14px;line-height:1.5;letter-spacing:0}
.hero p{font-size:18px;max-width:34em;color:var(--ink-2);margin-bottom:32px}
.cta{display:inline-flex;align-items:center;gap:10px;padding:13px 22px;border-radius:6px;font-weight:600;font-size:16px;border:2px solid var(--ink);color:var(--ink);transition:background .15s,color .15s}
.cta:hover{text-decoration:none;background:var(--ink);color:var(--paper)}
.cta.primary{background:var(--blue);border-color:var(--blue);color:#fff}
.cta.primary:hover{background:var(--ink);border-color:var(--ink)}
.cta-row{display:flex;gap:14px;flex-wrap:wrap}
.figure{background:var(--sheet);border:1px solid var(--line);padding:24px 24px 16px;border-radius:4px;position:relative}
.figure svg{width:100%;height:auto;color:var(--ink);display:block}
.figure .cap{display:flex;justify-content:space-between;font-size:12px;color:var(--ink-2);margin-top:12px;letter-spacing:.04em}
.legend{display:grid;grid-template-columns:1fr 1fr;gap:6px 20px;margin-top:14px;padding-top:14px;border-top:1px dashed var(--line);font-size:14px}
.legend a{color:var(--ink);display:flex;gap:10px;align-items:baseline}
.legend a b{font-family:var(--sans);font-weight:600;color:var(--blue);min-width:22px}
@media (max-width:900px){.hero .grid{grid-template-columns:1fr}.figure{order:-1}}

/* stats strip */
.strip{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--sheet)}
.strip .wrap{display:grid;grid-template-columns:repeat(4,1fr)}
.strip div{padding:22px 0;border-left:1px solid var(--line);padding-left:20px}
.strip div:first-child{border-left:0;padding-left:0}
.strip strong{font-family:var(--serif);font-size:30px;display:block;line-height:1.1}
.strip span{font-size:14px;color:var(--ink-2)}
@media (max-width:760px){.strip .wrap{grid-template-columns:1fr 1fr}.strip div:nth-child(3){border-left:0;padding-left:0}}

/* purpose */
.purpose .grid{grid-template-columns:1fr 1fr;gap:clamp(28px,5vw,64px)}
.purpose p{font-size:18px;line-height:1.9}
.purpose p.en{font-size:16px;line-height:1.75}
.purpose .since{font-family:var(--serif);font-size:15px;color:var(--gold);margin-bottom:16px}
@media (max-width:760px){.purpose .grid{grid-template-columns:1fr}}

/* conferences */
.conf{grid-template-columns:repeat(4,1fr)}
.conf a{display:block;background:var(--sheet);border:1px solid var(--line);border-top:3px solid var(--blue);padding:22px 22px 20px;color:var(--ink);min-height:100%}
.conf a:hover{text-decoration:none;border-color:var(--ink);border-top-color:var(--ink)}
.conf .code{font-weight:600;font-size:22px;letter-spacing:.02em}
.conf .name{font-size:14px;color:var(--ink-2);margin:6px 0 14px;min-height:3.2em}
.conf .site{font-size:13px;color:var(--blue)}
@media (max-width:960px){.conf{grid-template-columns:1fr 1fr}}
@media (max-width:520px){.conf{grid-template-columns:1fr}}

/* competitions */
.comp{grid-template-columns:1fr 1fr}
.card{background:var(--sheet);border:1px solid var(--line);padding:30px;border-radius:4px}
.card h3{font-size:24px;margin-bottom:6px}
.card .tag{display:inline-block;font-size:13px;font-weight:600;color:var(--gold);background:var(--gold-soft);padding:3px 10px;border-radius:3px;margin-bottom:14px}
.card p{color:var(--ink-2);font-size:16px;margin-bottom:18px}
.card dl{display:grid;grid-template-columns:auto 1fr;gap:6px 18px;font-size:15px;margin-bottom:18px}
.card dt{color:var(--ink-2)}
.card dd{font-weight:500}
@media (max-width:760px){.comp{grid-template-columns:1fr}}

/* journal */
.journal .grid{grid-template-columns:1.2fr .8fr;gap:clamp(28px,5vw,64px);align-items:start}
.journal h3{font-size:26px;margin-bottom:12px}
.journal ul{list-style:none;display:grid;gap:10px;margin:18px 0 26px}
.journal li{padding-left:18px;position:relative;color:var(--ink-2)}
.journal li::before{content:"";position:absolute;left:0;top:.8em;width:8px;height:1px;background:var(--blue)}
.cover{background:var(--sheet);border:1px solid var(--line);padding:28px;aspect-ratio:3/4;display:flex;flex-direction:column;justify-content:space-between;font-family:var(--serif)}
.cover .t{font-size:30px;line-height:1.2;font-weight:700}
.cover .b{font-family:var(--sans);font-size:13px;color:var(--ink-2)}
.cover .rule{height:2px;background:var(--blue);width:64px;margin:16px 0}
@media (max-width:760px){.journal .grid{grid-template-columns:1fr}.cover{aspect-ratio:auto;padding:22px}}

/* archive */
.archive table{width:100%;border-collapse:collapse;font-size:16px}
.archive th{text-align:left;font-weight:500;color:var(--ink-2);font-size:14px;padding:0 14px 12px;border-bottom:2px solid var(--ink)}
.archive td{padding:16px 14px;border-bottom:1px solid var(--line);vertical-align:top}
.archive td:first-child{font-family:var(--serif);font-weight:700;font-size:20px;width:90px}
.archive .scroll{overflow-x:auto}
.archive td a{white-space:nowrap}

/* youth */
.youth{background:var(--sheet)}
.youth .grid{grid-template-columns:.9fr 1.1fr;gap:clamp(28px,5vw,64px);align-items:center}
.youth p{color:var(--ink-2);font-size:17px;margin-bottom:14px}
.medal{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.medal div{border:1px solid var(--line);padding:18px;text-align:center}
.medal strong{font-family:var(--serif);display:block;font-size:22px;color:var(--gold)}
.medal span{font-size:13px;color:var(--ink-2)}
@media (max-width:760px){.youth .grid{grid-template-columns:1fr}}

/* news */
.news ol{list-style:none;border-top:1px solid var(--line)}
.news li{display:grid;grid-template-columns:120px 1fr;gap:20px;padding:18px 0;border-bottom:1px solid var(--line)}
.news time{font-size:14px;color:var(--ink-2);padding-top:3px}
.news a{color:var(--ink);font-weight:500;font-size:17px}
.news small{display:block;color:var(--ink-2);font-size:14px;margin-top:2px}
@media (max-width:520px){.news li{grid-template-columns:1fr;gap:4px}}

/* contact */
.contact .grid{grid-template-columns:1fr 1fr;gap:40px}
.contact dl{display:grid;grid-template-columns:auto 1fr;gap:10px 24px;font-size:17px}
.contact dt{color:var(--ink-2)}
.contact .box{background:var(--sheet);border:1px solid var(--line);padding:28px}
.contact .box h3{font-size:20px;margin-bottom:8px}
.contact .box p{color:var(--ink-2);font-size:15px;margin-bottom:16px}
@media (max-width:760px){.contact .grid{grid-template-columns:1fr}}

footer{border-top:1px solid var(--line);padding:32px 0;font-size:14px;color:var(--ink-2)}
footer .wrap{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
footer a{color:var(--ink-2)}

/* multi-page additions */
.logo{display:inline-block;line-height:0;border-radius:6px;padding:4px 6px}
.logo img{height:46px;width:auto}
.logo.foot img{height:34px}
@media (max-width:860px){.logo img{height:38px}}
.nav nav{gap:22px;align-items:center}
.nav nav>a,.nav nav .dd>a{display:inline-flex;align-items:center;line-height:1.3;padding:6px 0}
.nav nav .dd{display:flex}
.nav nav a.on{border-bottom-color:var(--blue);font-weight:700}
.nav nav .dd{position:relative}
.nav nav .dd>a::after{content:"";display:inline-block;width:6px;height:6px;border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;transform:rotate(45deg);margin:0 0 3px 8px}
.nav nav .dd ul{list-style:none;position:absolute;left:-14px;top:100%;background:var(--sheet);border:1px solid var(--line);min-width:200px;padding:6px 0;display:none;box-shadow:0 8px 24px rgba(21,34,56,.08)}
.nav nav .dd:hover ul,.nav nav .dd:focus-within ul{display:block}
.nav nav .dd ul a{display:block;padding:9px 16px;border:0;font-weight:400}
.nav nav .dd ul a:hover{background:var(--blue-soft)}
@media (max-width:860px){
  .nav nav .dd ul{position:static;display:block;border:0;box-shadow:none;background:none;padding:0 0 0 16px}
  .nav nav .dd>a::after{display:none}
  .nav nav .dd ul a{border-bottom:1px solid var(--line)}
}
.page-head{padding:clamp(40px,6vw,72px) 0 clamp(28px,4vw,44px);border-bottom:1px solid var(--line)}
.page-head h1{font-size:clamp(30px,4vw,46px)}
.page-head .en{font-size:16px;margin-top:6px;font-style:italic}
.crumb{font-size:13px;color:var(--ink-2);margin-bottom:14px}
.crumb a{color:var(--ink-2)}
main>section:first-of-type{border-top:0}
.prose{max-width:46em}
.prose p{margin-bottom:1em;font-size:17px;line-height:1.85}
.prose p.en{font-size:16px;line-height:1.75}
.aims{display:grid;grid-template-columns:1fr 1fr;gap:clamp(24px,4vw,56px)}
.aims ol{list-style:none;counter-reset:a}
.aims li{counter-increment:a;display:grid;grid-template-columns:44px 1fr;gap:12px;padding:16px 0;border-bottom:1px solid var(--line);font-size:17px;line-height:1.75}
.aims li::before{content:counter(a,cjk-ideographic);font-family:var(--serif);font-weight:700;color:var(--blue);font-size:20px}
.aims ol.en li::before{content:counter(a)}
.aims ol.en li{font-size:15.5px;color:var(--ink-2)}
@media (max-width:760px){.aims{grid-template-columns:1fr}}
.timeline{list-style:none;max-width:46em}
.timeline li{display:grid;grid-template-columns:92px 1fr;gap:20px;padding:18px 0;border-bottom:1px solid var(--line)}
.timeline b{font-family:var(--serif);font-size:22px;color:var(--blue)}
.timeline small{display:block;color:var(--ink-2);font-size:14px}
.roster h3{font-size:22px;margin:40px 0 12px;padding-bottom:8px;border-bottom:2px solid var(--ink)}
.roster h3:first-of-type{margin-top:0}
.roster table{width:100%;border-collapse:collapse}
.roster td{padding:14px 12px 14px 0;border-bottom:1px solid var(--line);vertical-align:top;font-size:16px}
.roster td:nth-child(1){width:150px;color:var(--ink-2);font-size:15px}
.roster td:nth-child(2){width:230px;font-weight:600}
.roster td span{display:block;font-weight:400;font-size:13.5px;color:var(--ink-2)}
@media (max-width:700px){
  .roster tr{display:grid;grid-template-columns:1fr;padding:12px 0;border-bottom:1px solid var(--line)}
  .roster td{border:0;padding:2px 0;width:auto!important}
}
.quick{grid-template-columns:repeat(3,1fr)}
.quick a{display:block;background:var(--sheet);border:1px solid var(--line);padding:26px;color:var(--ink);border-radius:4px}
.quick a:hover{text-decoration:none;border-color:var(--ink)}
.quick h3{font-size:22px;margin-bottom:8px}
.quick p{color:var(--ink-2);font-size:15px}
@media (max-width:760px){.quick{grid-template-columns:1fr}}
.more{margin-top:28px}
.detail{max-width:46em;font-size:16px;color:var(--ink-2)}
.detail p{margin-bottom:14px}
.clogo{height:56px;display:flex;align-items:center;margin-bottom:14px}
.clogo img{max-height:56px;width:auto;max-width:100%}
.clogo.tall{height:96px}.clogo.tall img{max-height:96px}
.conf .name{min-height:0}
.plogo{margin-bottom:22px}.plogo img{max-height:90px;width:auto}
.minilogos{display:flex;gap:16px;align-items:center;flex-wrap:wrap;margin-top:16px;padding-top:14px;border-top:1px solid var(--line)}
.minilogos img{height:26px;width:auto}
.line-btn{display:inline-flex;align-items:center;gap:8px;background:#06C755;color:#fff;padding:8px 16px;border-radius:6px;font-weight:600;font-size:15px}
.line-btn:hover{text-decoration:none;background:#05a949;transform:translateY(-2px)}
.line-btn{transition:background .15s,transform .15s}
.todo{border:1.5px dashed var(--gold);background:var(--gold-soft);padding:18px 22px;border-radius:4px;color:var(--ink);font-size:15px;margin:18px 0}
.todo b{display:block;margin-bottom:4px}
.gallery{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:20px}
.gallery div{aspect-ratio:4/3;background:var(--blue-soft);border:1px solid var(--line);display:grid;place-items:center;color:var(--ink-2);font-size:13px}
@media (max-width:700px){.gallery{grid-template-columns:1fr 1fr}}
.article{max-width:46em}
.article p{margin-bottom:1em;font-size:17px;line-height:1.85}
.article .meta{color:var(--ink-2);font-size:14px;margin-bottom:24px}
.article img.banner{width:100%;border:1px solid var(--line);margin-bottom:24px}
.files{list-style:none;margin-top:8px}
.files li{padding:12px 0;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
.files li span{color:var(--ink-2);font-size:14px}
.years{grid-template-columns:repeat(3,1fr)}
.years a{display:block;background:var(--sheet);border:1px solid var(--line);padding:22px 24px;color:var(--ink);border-radius:4px}
.years a:hover{text-decoration:none;border-color:var(--ink)}
.years b{font-family:var(--serif);font-size:30px;display:block}
.years span{color:var(--ink-2);font-size:14px}
@media (max-width:760px){.years{grid-template-columns:1fr 1fr}}

/* ---- motion ---- */
.gear{transform-box:view-box;transform-origin:0 0;animation:spin 48s linear infinite}
.gear-b{animation:spin 32s linear infinite reverse}
@keyframes spin{to{transform:rotate(360deg)}}
.glow{animation:glow 4s ease-in-out infinite}
.rays{animation:rays 4s ease-in-out infinite}
@keyframes glow{0%,100%{opacity:0}50%{opacity:.28}}
@keyframes rays{0%,100%{opacity:.35}50%{opacity:1}}
.hero h1,.hero p,.hero .cta-row,.hero .figure{animation:rise .8s cubic-bezier(.2,.7,.2,1) both}
.hero p{animation-delay:.12s}.hero .cta-row{animation-delay:.22s}.hero .figure{animation-delay:.3s}
@keyframes rise{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:none}}
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s ease,transform .7s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}
.reveal:nth-child(2){transition-delay:.08s}.reveal:nth-child(3){transition-delay:.16s}.reveal:nth-child(4){transition-delay:.24s}
.nav nav a{position:relative;border-bottom:0!important}
.nav nav a::before{content:"";position:absolute;left:0;bottom:0;height:2px;width:100%;background:var(--blue);transform:scaleX(0);transform-origin:left;transition:transform .25s ease}
.nav nav a:hover::before,.nav nav a.on::before{transform:scaleX(1)}
.nav nav .dd ul a::before{display:none}
.nav nav .dd ul{animation:drop .18s ease both}
@keyframes drop{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:none}}
.conf a,.quick a,.years a,.card{transition:transform .25s ease,box-shadow .25s ease,border-color .2s}
.conf a:hover,.quick a:hover,.years a:hover{transform:translateY(-4px);box-shadow:0 14px 30px rgba(21,34,56,.10)}
.cta{transition:background .15s,color .15s,transform .15s}
.cta:hover{transform:translateY(-2px)}
.cta:active{transform:none}
.legend a{transition:color .15s}
.legend a:hover{color:var(--blue);text-decoration:none}
.legend a:hover b{text-decoration:underline}
.figure:hover .gear{animation-duration:14s}
.figure:hover .gear-b{animation-duration:9.3s}
@media (prefers-reduced-motion:reduce){
  .gear,.gear-b,.glow,.rays,.hero h1,.hero p,.hero .cta-row,.hero .figure,.nav nav .dd ul{animation:none!important}
  .reveal{opacity:1;transform:none;transition:none}
  .conf a:hover,.quick a:hover,.years a:hover,.cta:hover{transform:none}
}