*,*::before,*::after{box-sizing:border-box}
:root{
  --signal:#E85D04;
  --deep:#0B2A22;
  --slate:#54687A;
  --cyan:#14E0C4;
  --ink:#0E1114;
  --paper:#F7F5EF;
  --sand:#FFE0C7;
  --blue:#245A7A;
  --line:#C9D2D9;
  --amber:#FFB020;
  --font-display:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-body:"Inter","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-data:"IBM Plex Mono","JetBrains Mono","SFMono-Regular",Consolas,monospace;
  --shell:1240px;
  --r-lg:34px;
  --r-md:24px;
  --r-sm:16px;
  --shadow-lift:0 22px 44px -28px rgba(11,42,34,.55);
}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;min-height:100vh;display:flex;flex-direction:column;
  background:var(--paper);color:var(--ink);
  font-family:var(--font-body);font-size:17px;line-height:1.75;font-weight:400;
  letter-spacing:.01em;text-rendering:optimizeLegibility;
}
main{flex:1 0 auto}
img,svg,video{max-width:100%;display:block}
a{color:inherit}
button{font:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:3px solid var(--blue);outline-offset:3px;border-radius:6px}
::selection{background:var(--sand);color:var(--ink)}

/* ---------- layout helpers ---------- */
.container{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:clamp(18px,4vw,32px)}
.section{padding-block:clamp(48px,7vw,96px)}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-data);font-size:12.5px;letter-spacing:.2em;
  text-transform:uppercase;color:var(--slate);font-weight:500;
}
.eyebrow::before{content:"";width:28px;height:2px;border-radius:2px;background:var(--signal)}
.prose{max-width:36em;font-size:17px;line-height:1.8;color:#26313a}
.prose p+p{margin-top:1em}
.prose h2,.prose h3{font-family:var(--font-display);font-weight:900;letter-spacing:-.01em;line-height:1.25;margin-top:1.6em}
.prose h2{font-size:clamp(24px,2.6vw,32px)}
.prose h3{font-size:clamp(20px,2vw,24px)}
.prose ul,.prose ol{list-style:disc;padding-left:1.25em;margin-top:.9em}
.prose li+li{margin-top:.4em}
.prose a{color:var(--blue);text-decoration:underline;text-underline-offset:3px}
.prose a:hover{color:var(--signal)}
.grid{display:grid;gap:clamp(16px,2.4vw,26px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--split{grid-template-columns:minmax(0,7fr) minmax(0,5fr);align-items:start}
.breadcrumb{font-family:var(--font-data);font-size:12.5px;letter-spacing:.06em;color:var(--slate)}
.breadcrumb__list{display:flex;flex-wrap:wrap;gap:8px}
.breadcrumb__list li{display:flex;align-items:center;gap:8px}
.breadcrumb__list li+li::before{content:"/";color:var(--line)}
.breadcrumb a{color:var(--slate);text-decoration:none}
.breadcrumb a:hover{color:var(--signal)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  min-height:48px;padding:0 26px;border-radius:999px;border:1.5px solid transparent;
  font-family:var(--font-body);font-size:15px;font-weight:700;letter-spacing:.02em;
  text-decoration:none;cursor:pointer;
  transition:transform .2s ease,background-color .2s ease,border-color .2s ease,color .2s ease;
}
.btn--signal{background:var(--signal);color:var(--ink);box-shadow:0 12px 26px -16px rgba(232,93,4,.95)}
.btn--signal:hover{background:#FF7A1F;transform:translateY(-2px)}
.btn--ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn--ghost:hover{border-color:var(--signal);color:var(--signal);transform:translateY(-2px)}
.btn--ghost--onDark{color:#fff;border-color:rgba(255,255,255,.45)}
.btn--ghost--onDark:hover{color:var(--cyan);border-color:var(--cyan)}

/* ---------- header ---------- */
.site-header{position:relative;z-index:60;background:var(--paper);border-bottom:1px solid var(--line)}
.skip-link{
  position:absolute;left:16px;top:-64px;z-index:200;
  background:var(--deep);color:#fff;padding:12px 20px;border-radius:0 0 16px 16px;
  font-size:14px;font-weight:700;text-decoration:none;transition:top .18s ease;
}
.skip-link:focus{top:0;color:var(--cyan)}
.scroll-meter{position:fixed;top:0;left:0;right:0;height:3px;z-index:150;pointer-events:none}
.scroll-meter__bar{display:block;height:100%;width:100%;transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--signal),var(--amber) 45%,var(--cyan));}

.rail{background:var(--deep);color:#fff}
.rail__inner{
  max-width:var(--shell);margin-inline:auto;display:flex;align-items:center;gap:16px;
  padding:9px clamp(18px,4vw,32px);overflow-x:auto;
  font-family:var(--font-data);font-size:12.5px;letter-spacing:.08em;scrollbar-width:none;
}
.rail__inner::-webkit-scrollbar{display:none}
.rail__dot{flex:none;width:8px;height:8px;border-radius:50%;background:var(--cyan);
  box-shadow:0 0 0 4px rgba(20,224,196,.18)}
.rail__label{flex:none;text-transform:uppercase;color:rgba(255,255,255,.55);letter-spacing:.18em}
.rail__list{display:flex;align-items:center;gap:16px;flex:none}
.rail__link{
  color:#fff;text-decoration:none;white-space:nowrap;padding-bottom:2px;
  border-bottom:1px solid transparent;transition:color .18s ease,border-color .18s ease;
}
.rail__link:hover,.rail__link:focus-visible{color:var(--cyan);border-bottom-color:var(--cyan)}
.rail__link--end{margin-left:auto;flex:none;padding-left:14px;color:rgba(255,255,255,.8)}

.masthead__inner{
  max-width:var(--shell);margin-inline:auto;
  padding:clamp(14px,2.2vw,24px) clamp(18px,4vw,32px) clamp(10px,1.6vw,16px);
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:18px;
}
.masthead__meta{
  font-family:var(--font-data);font-size:11.5px;line-height:1.7;letter-spacing:.16em;
  text-transform:uppercase;color:var(--slate);
}
.masthead__meta b{display:inline-block;margin-top:4px;font-weight:600;color:var(--ink);letter-spacing:.1em}
.brand{display:inline-flex;flex-direction:column;align-items:center;gap:6px;text-decoration:none;justify-self:center}
.brand__cn{
  font-family:var(--font-display);font-weight:900;font-style:italic;
  font-size:clamp(26px,3.4vw,42px);line-height:1;letter-spacing:-.03em;color:var(--ink);
}
.brand__cn::after{content:"";display:block;height:3px;margin-top:8px;border-radius:3px;
  background:linear-gradient(90deg,var(--signal),var(--amber) 60%,transparent)}
.brand__en{
  font-family:var(--font-data);font-size:10.5px;letter-spacing:.42em;
  text-transform:uppercase;color:var(--slate);text-indent:.42em;
}
.brand:hover .brand__cn{color:var(--signal)}
.masthead__actions{display:flex;align-items:center;justify-content:flex-end;gap:10px}
.masthead__cta{min-height:44px;padding:0 20px;font-size:14px;white-space:nowrap}

.nav-toggle{
  display:none;align-items:center;gap:9px;
  padding:10px 15px;border-radius:999px;border:1.5px solid var(--line);
  background:#fff;font-size:14px;font-weight:700;letter-spacing:.04em;color:var(--ink);cursor:pointer;
  transition:border-color .18s ease,color .18s ease;
}
.nav-toggle:hover{border-color:var(--signal);color:var(--signal)}
.nav-toggle__bars{display:inline-flex;flex-direction:column;gap:4px;width:16px}
.nav-toggle__bars span{display:block;height:2px;border-radius:2px;background:currentColor;
  transition:transform .2s ease,opacity .2s ease}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.nav-toggle__text{white-space:nowrap}

.site-nav{max-width:var(--shell);margin-inline:auto;padding:0 clamp(18px,4vw,32px)}
.site-nav__list{display:flex;justify-content:center;flex-wrap:wrap;gap:6px;padding:6px 0 16px}
.site-nav__item{display:block}
.site-nav__link{
  display:inline-block;padding:9px 18px;border-radius:999px;
  font-size:15px;font-weight:600;text-decoration:none;color:var(--ink);
  border:1px solid transparent;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease;
}
.site-nav__link:hover{background:var(--sand)}
.site-nav__link[aria-current="page"]{background:var(--deep);color:#fff;border-color:var(--deep)}
.site-nav__link[aria-current="page"]:hover{background:var(--deep);color:var(--cyan)}

/* ---------- footer ---------- */
.site-footer{
  position:relative;overflow:hidden;margin-top:clamp(56px,8vw,110px);
  padding:clamp(40px,6vw,72px) 0 26px;
  background:var(--deep);color:#fff;border-radius:40px 40px 0 0;
}
.site-footer::before{
  content:"";position:absolute;inset:0 0 auto;height:220px;pointer-events:none;
  background:linear-gradient(118deg,rgba(232,93,4,.36),rgba(20,224,196,.14) 55%,transparent 82%);
}
.site-footer > *{position:relative;z-index:1}
.footer__mark{
  position:absolute;right:-12px;bottom:-18px;z-index:0;pointer-events:none;
  font-family:var(--font-display);font-weight:900;font-size:clamp(60px,13vw,170px);
  line-height:.8;letter-spacing:-.05em;color:rgba(255,255,255,.05);white-space:nowrap;
}
.footer__top{display:grid;grid-template-columns:minmax(240px,1.05fr) 2fr;gap:clamp(28px,5vw,64px)}
.footer__title{
  font-family:var(--font-display);font-weight:900;font-style:italic;
  font-size:clamp(26px,3.2vw,38px);line-height:1.1;letter-spacing:-.02em;
}
.footer__line{margin-top:14px;max-width:22em;font-size:15.5px;line-height:1.75;color:rgba(255,255,255,.72)}
.footer__grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.footer__col{min-width:0}
.footer__heading{
  font-family:var(--font-data);font-size:11.5px;font-weight:600;letter-spacing:.2em;
  text-transform:uppercase;color:var(--cyan);margin-bottom:14px;
}
.footer__links{display:grid;gap:9px}
.footer__links a{
  font-size:15px;color:rgba(255,255,255,.82);text-decoration:none;
  border-bottom:1px solid transparent;transition:color .18s ease,border-color .18s ease;
}
.footer__links a:hover,.footer__links a:focus-visible{color:var(--cyan);border-bottom-color:var(--cyan)}
.footer__contact{
  display:flex;flex-wrap:wrap;gap:12px clamp(20px,4vw,44px);
  margin-top:clamp(30px,4vw,44px);padding-top:22px;
  border-top:1px solid rgba(255,255,255,.16);
}
.footer__contact-item{
  display:flex;align-items:baseline;gap:10px;font-family:var(--font-data);
  font-size:13.5px;letter-spacing:.02em;color:rgba(255,255,255,.9);
}
.footer__note{
  font-family:var(--font-data);font-size:11px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--amber);white-space:nowrap;
}
.footer__legal{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  margin-top:22px;padding-top:18px;border-top:1px solid rgba(255,255,255,.16);
  font-family:var(--font-data);font-size:12.5px;letter-spacing:.06em;color:rgba(255,255,255,.62);
}
.footer__legal-line{margin:0}
.footer__legal-links{display:flex;flex-wrap:wrap;gap:18px}
.footer__legal-links a{color:rgba(255,255,255,.82);text-decoration:none}
.footer__legal-links a:hover,.footer__legal-links a:focus-visible{color:var(--cyan)}
.site-footer :focus-visible{outline-color:var(--cyan)}

/* ---------- shared components ---------- */
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  padding:clamp(20px,2.4vw,28px);
  transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.card:hover{transform:translateY(-4px);border-color:var(--signal);box-shadow:var(--shadow-lift)}
.card__title{font-family:var(--font-display);font-weight:900;font-size:clamp(19px,2vw,23px);line-height:1.35;letter-spacing:-.01em}
.card__meta{margin-top:10px;font-size:14.5px;line-height:1.7;color:var(--slate)}
.tag{
  display:inline-flex;align-items:center;gap:6px;min-height:28px;padding:0 13px;border-radius:999px;
  font-family:var(--font-data);font-size:11.5px;letter-spacing:.12em;text-transform:uppercase;
  background:var(--sand);color:var(--ink);border:1px solid rgba(232,93,4,.28);
}
.tag--deep{background:var(--deep);color:var(--cyan);border-color:transparent}
.tag--blue{background:var(--blue);color:#fff;border-color:transparent}
.stat{display:flex;flex-direction:column;gap:4px}
.stat__value{font-family:var(--font-data);font-weight:600;font-size:clamp(24px,3vw,34px);
  line-height:1.1;letter-spacing:-.02em;font-variant-numeric:tabular-nums}
.stat__label{font-size:13.5px;letter-spacing:.04em;color:var(--slate)}
.runway{
  display:flex;gap:18px;overflow-x:auto;scroll-snap-type:x mandatory;
  padding:4px clamp(18px,4vw,32px) 18px;scrollbar-width:thin;
}
.runway__item{flex:0 0 min(320px,78vw);scroll-snap-align:start}

/* reusable image container */
.media{
  position:relative;overflow:hidden;isolation:isolate;border-radius:var(--r-lg);
  background:linear-gradient(148deg,var(--deep) 0%,#123c33 48%,var(--blue) 100%);
}
.media::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(120% 90% at 86% 0%,rgba(20,224,196,.26),transparent 62%),
    radial-gradient(95% 80% at 8% 100%,rgba(232,93,4,.34),transparent 64%);
}
.media--wide{aspect-ratio:16/9}
.media--tall{aspect-ratio:3/4}
.media--square{aspect-ratio:1/1}
.media__img{width:100%;height:100%;object-fit:cover;filter:saturate(.92) contrast(1.05)}
.media__scrim{
  position:absolute;inset:auto 0 0;z-index:2;padding:20px;
  background:linear-gradient(0deg,rgba(11,42,34,.86),rgba(11,42,34,0));
  color:#fff;
}
.media__caption{
  position:relative;z-index:2;margin:0;font-family:var(--font-data);
  font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:rgba(255,255,255,.86);
}

/* to-top (injected by JS) */
.to-top{
  position:fixed;right:clamp(14px,3vw,24px);bottom:clamp(14px,3vw,24px);z-index:90;
  width:50px;height:50px;border-radius:50%;border:1.5px solid rgba(255,255,255,.5);
  background:var(--deep);color:#fff;font-size:18px;line-height:1;cursor:pointer;
  display:grid;place-items:center;
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .2s ease,transform .2s ease,visibility .2s ease,background-color .2s ease,color .2s ease;
}
.to-top[data-visible]{opacity:1;visibility:visible;transform:none}
.to-top:hover,.to-top:focus-visible{background:var(--signal);color:var(--ink);border-color:var(--signal)}

/* reveal */
.has-js [data-reveal]{opacity:0;transform:translateY(18px);
  transition:opacity .24s ease,transform .24s ease}
.has-js [data-reveal].is-revealed{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--split{grid-template-columns:1fr}
  .footer__top{grid-template-columns:1fr}
}
@media (max-width:860px){
  body{font-size:16.5px}
  .masthead__inner{grid-template-columns:1fr auto;align-items:center;gap:12px}
  .masthead__meta{display:none}
  .brand{justify-self:start;align-items:flex-start}
  .brand__cn{font-size:clamp(24px,6vw,32px)}
  .brand__en{letter-spacing:.3em;font-size:9.5px}
  .nav-toggle{display:inline-flex}
  .masthead__cta{display:none}
  .site-nav{
    max-height:0;overflow:hidden;padding-inline:clamp(12px,3vw,20px);
    transition:max-height .28s ease;
  }
  .site-nav[data-open]{max-height:560px;padding-bottom:14px}
  .site-nav__list{flex-direction:column;align-items:stretch;gap:4px;padding:8px 0 4px;justify-content:flex-start}
  .site-nav__link{display:block;padding:14px 18px;border-radius:var(--r-sm);font-size:16px}
  .site-nav__link:hover{background:var(--sand)}
  .footer__grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer__legal{flex-direction:column;align-items:flex-start}
}
@media (max-width:640px){
  .grid--2,.grid--3{grid-template-columns:1fr}
  .footer__grid{grid-template-columns:1fr;gap:22px}
  .footer__contact{flex-direction:column;gap:10px}
  .footer__contact-item{flex-wrap:wrap}
  .footer__mark{font-size:clamp(48px,17vw,90px);opacity:.8}
  .media--wide{aspect-ratio:4/3}
  .runway{padding-bottom:14px}
  .btn{width:auto}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms!important;animation-iteration-count:1!important;
    transition-duration:.001ms!important;
  }
  .has-js [data-reveal]{opacity:1;transform:none;transition:none}
  .card:hover,.btn:hover{transform:none}
}