/* BIAA / 标奥 — site styles. Brand tokens match the VI system. */
:root{
  --navy:#0C2848; --navy-deep:#081C34; --orange:#F28C1C; --orange-dk:#D9760C;
  --teal:#0D6C7C; --slate:#5A6369; --mist:#F3F5F7; --cloud:#E4E8EC;
  --ink:#121E2E; --paper:#fff;
  --maxw:1200px; --r:18px;
  --sans:"Montserrat",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;
  --cjk:"Noto Sans SC","Noto Sans TC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font:var(--sans);
}
html[lang^="zh"]{--font:var(--cjk),var(--sans);}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--ink);background:var(--paper);line-height:1.65;-webkit-font-smoothing:antialiased}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
a{color:inherit;text-decoration:none}
h1,h2,h3{font-family:var(--sans);line-height:1.18;color:var(--navy);letter-spacing:-.01em}
html[lang^="zh"] h1,html[lang^="zh"] h2,html[lang^="zh"] h3{font-family:var(--cjk),var(--sans)}
section{padding:84px 0}
.eyebrow{font-family:var(--sans);font-weight:600;letter-spacing:.16em;text-transform:uppercase;
  font-size:13px;color:var(--orange)}
.lead{font-size:19px;color:var(--slate)}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:.5em;font-weight:700;font-family:var(--font);
  border-radius:999px;padding:14px 26px;font-size:16px;transition:.18s;cursor:pointer;border:2px solid transparent}
.btn-primary{background:var(--orange);color:#fff}
.btn-primary:hover{background:var(--orange-dk)}
.btn-ghost{border-color:rgba(255,255,255,.4);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.1)}
.btn-dark{background:var(--navy);color:#fff}
.btn-dark:hover{background:var(--navy-deep)}

/* header / nav */
header.site{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);
  backdrop-filter:saturate(160%) blur(10px);border-bottom:1px solid var(--cloud)}
.nav{display:flex;align-items:center;justify-content:space-between;height:74px}
.brand{display:flex;align-items:center;gap:12px}
.badge{width:46px;height:46px;border-radius:11px;background:var(--navy);display:grid;place-items:center;
  color:#fff;font-family:var(--sans);font-weight:800;font-size:17px;letter-spacing:-.02em}
.brand b{font-family:var(--cjk),var(--sans);font-weight:700;font-size:20px;color:var(--navy);display:block;line-height:1.1}
.brand span{font-family:var(--sans);font-weight:600;font-size:11px;letter-spacing:.12em;color:#9aa2a9}
.nav nav{display:flex;align-items:center;gap:26px}
.nav nav a{font-weight:500;font-size:15px;color:var(--ink)}
.nav nav a:hover{color:var(--orange)}
.langs{display:flex;gap:8px;font-size:13px;color:#9aa2a9;font-family:var(--sans)}
.langs a{padding:2px 6px;border-radius:6px}
.langs a[aria-current]{background:var(--navy);color:#fff}
.menu-toggle{display:none}

/* hero */
.hero{background:var(--navy);color:#fff;overflow:hidden}
.hero .wrap{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}
.hero h1{color:#fff;font-size:clamp(34px,5vw,60px);font-weight:800;margin:18px 0}
.hero h1 .accent{color:var(--orange)}
.hero .lead{color:#bccadb;font-size:20px;max-width:36em}
.hero .cta{display:flex;gap:14px;flex-wrap:wrap;margin-top:30px}
.hero .sub{color:#93aacb;font-family:var(--sans);font-weight:500;margin-top:10px;letter-spacing:.02em}
.hero-card{background:#fff;color:var(--ink);border-radius:24px;padding:30px;box-shadow:0 30px 60px rgba(0,0,0,.3)}
.hero-card h3{font-size:18px}
.hero-card .sub{color:#9aa2a9;font-size:13px;font-family:var(--sans)}
.bars{display:flex;align-items:flex-end;gap:14px;height:120px;margin-top:24px}
.bars i{display:block;width:42px;border-radius:10px;background:var(--navy)}
.bars i:nth-child(1){height:30%}.bars i:nth-child(2){height:52%}
.bars i:nth-child(3){height:74%}.bars i:nth-child(4){height:100%;background:var(--orange)}
.bars small{position:relative}
.barlabels{display:flex;gap:14px;margin-top:8px;color:#9aa2a9;font-size:11px;font-family:var(--sans)}
.barlabels span{width:42px;text-align:center}

/* stats */
.stats{background:var(--mist)}
.stats .grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;text-align:center}
.stats .num{font-family:var(--sans);font-weight:800;font-size:clamp(30px,4vw,48px);color:var(--orange)}
.stats .lbl{color:var(--slate);font-weight:500;margin-top:4px}
.stats .grid>div{padding:14px;border-left:1px solid var(--cloud)}
.stats .grid>div:first-child{border-left:none}

/* generic section head */
.shead{display:flex;align-items:baseline;gap:14px;margin-bottom:10px}
.shead h2{font-size:clamp(26px,3.4vw,40px);font-weight:800}
.shead .en{color:#aab2b9;font-family:var(--sans);font-weight:500;font-size:18px}
.subhead{color:var(--slate);max-width:46em;margin-bottom:36px}

/* program cards */
.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.card{background:var(--mist);border:1px solid var(--cloud);border-radius:22px;padding:28px;transition:.18s}
.card:hover{transform:translateY(-4px);box-shadow:0 18px 36px rgba(12,40,72,.1)}
.card .ic{width:62px;height:62px;border-radius:15px;display:grid;place-items:center;color:#fff;font-size:28px;margin-bottom:18px}
.card h3{font-size:21px;margin-bottom:2px}
.card .en{color:#aab2b9;font-family:var(--sans);font-weight:500;font-size:13px;margin-bottom:12px}
.card p{color:var(--slate);font-size:15px}
.card .more{display:inline-block;margin-top:16px;color:var(--orange);font-weight:600;font-size:14px}

/* navy band */
.band{background:var(--navy);color:#fff}
.band h2{color:#fff}
.band .points{display:grid;grid-template-columns:repeat(3,1fr);gap:34px;margin-top:14px}
.band .points h3{color:#fff;font-size:21px;display:flex;align-items:center;gap:12px}
.band .points h3::before{content:"";width:14px;height:14px;border-radius:50%;background:var(--orange);flex:none}
.band .points p{color:#bccadb;margin-top:10px}

/* method steps */
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;counter-reset:s}
.step{background:#fff;border:1px solid var(--cloud);border-radius:16px;padding:22px;position:relative}
.step::before{counter-increment:s;content:counter(s);font-family:var(--sans);font-weight:800;color:var(--orange);font-size:26px}
.step h3{font-size:17px;margin:6px 0 4px}
.step p{color:var(--slate);font-size:14px}

/* chips */
.chips{display:flex;flex-wrap:wrap;gap:14px}
.chip{border:1px solid var(--cloud);background:var(--mist);border-radius:999px;padding:12px 22px;font-weight:500;color:var(--ink)}

/* testimonials */
.quotes{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.quote{background:#fff;border:1px solid var(--cloud);border-radius:18px;padding:26px}
.quote p{font-size:16px}
.quote .by{margin-top:16px;color:var(--slate);font-size:14px;font-weight:600}

/* faq */
.faq details{border-bottom:1px solid var(--cloud);padding:18px 0}
.faq summary{font-weight:700;font-size:18px;cursor:pointer;list-style:none;display:flex;justify-content:space-between;color:var(--navy)}
.faq summary::after{content:"+";color:var(--orange);font-weight:800;font-size:24px}
.faq details[open] summary::after{content:"–"}
.faq p{color:var(--slate);margin-top:12px;max-width:60em}

/* cta */
.ctaband{background:var(--navy-deep);color:#fff;text-align:left}
.ctaband h2{color:#fff;font-size:clamp(26px,3.4vw,38px)}
.ctaband p{color:#bccadb;margin:12px 0 26px}

/* footer */
footer.site{background:#091e38;color:#bccadb;padding:60px 0 30px;font-size:14px}
footer .top{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:30px}
footer .badge{margin-bottom:14px}
footer h4{color:#fff;font-size:15px;margin-bottom:14px;font-family:var(--sans)}
footer a{display:block;color:#bccadb;margin-bottom:9px}
footer a:hover{color:var(--orange)}
footer .brand b{color:#fff}
footer .bottom{border-top:1px solid #1c3250;margin-top:40px;padding-top:22px;display:flex;
  justify-content:space-between;flex-wrap:wrap;gap:12px;color:#7e92ad}
.disclaimer{color:#7e92ad;font-size:12px;margin-top:8px}

/* responsive */
@media(max-width:900px){
  .hero .wrap{grid-template-columns:1fr}
  .cards,.stats .grid{grid-template-columns:repeat(2,1fr)}
  .band .points,.quotes{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr 1fr}
  footer .top{grid-template-columns:1fr 1fr}
  .nav nav{display:none}
}
@media(max-width:560px){
  .cards,.stats .grid,.steps,footer .top{grid-template-columns:1fr}
  section{padding:56px 0}
}

/* ---- inner pages (generated) ---- */
.breadcrumb{font-size:13px;color:#9aa2a9;padding:16px 0;font-family:var(--sans)}
.breadcrumb a{color:#9aa2a9}.breadcrumb a:hover{color:var(--orange)}
.breadcrumb span{color:var(--navy)}
.page-hero{background:var(--navy);color:#fff;padding:54px 0 60px}
.page-hero .eyebrow{color:var(--orange)}
.page-hero h1{color:#fff;font-size:clamp(28px,4vw,46px);margin:10px 0 14px}
.page-hero p{color:#bccadb;max-width:50em;font-size:18px}
.prose{max-width:760px;margin:0 auto}
.prose h2{font-size:26px;margin:38px 0 12px}
.prose h3{font-size:20px;margin:26px 0 8px}
.prose p,.prose li{color:#2c3a4a;font-size:17px;line-height:1.75}
.prose ul,.prose ol{margin:12px 0 12px 22px}.prose li{margin:6px 0}
.prose a{color:var(--orange-dk);text-decoration:underline;text-underline-offset:2px}
.prose .lede{font-size:19px;color:var(--slate)}
.prose blockquote{border-left:4px solid var(--orange);margin:22px 0;padding:6px 18px;color:var(--slate)}
.callout{background:var(--mist);border:1px solid var(--cloud);border-radius:16px;padding:22px 26px;margin:26px 0}
.callout strong{color:var(--navy)}
.related{border-top:1px solid var(--cloud);margin-top:48px;padding-top:28px}
.related h3{font-size:16px;color:#9aa2a9;font-family:var(--sans);text-transform:uppercase;letter-spacing:.08em}
.related a{display:inline-block;margin:6px 14px 6px 0;color:var(--navy);font-weight:600}
.postgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.postcard{display:block;background:#fff;border:1px solid var(--cloud);border-radius:18px;padding:24px;transition:.18s}
.postcard:hover{transform:translateY(-3px);box-shadow:0 16px 32px rgba(12,40,72,.1)}
.postcard .tag{font-family:var(--sans);font-size:12px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--orange)}
.postcard h3{font-size:19px;margin:8px 0}.postcard p{color:var(--slate);font-size:14px}
.postcard time{color:#9aa2a9;font-size:12px;font-family:var(--sans)}
.tcols{display:grid;grid-template-columns:1fr 1fr;gap:30px}
@media(max-width:900px){.postgrid{grid-template-columns:1fr 1fr}.tcols{grid-template-columns:1fr}}
@media(max-width:560px){.postgrid{grid-template-columns:1fr}}