/* TwinC AI — upgraded marketing site */
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:#fff;color:var(--fg-1);
  font-family:var(--font-sans);
  font-size:var(--fs-body);line-height:var(--lh-normal);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}

.tc-app{background:#fff;color:var(--fg-1)}
.tc-app main{overflow-x:hidden}

/* ============================================================
   Header — sticky, white, slim
   ============================================================ */
.tc-header{
  position:sticky;top:0;z-index:50;
  display:flex;align-items:center;gap:32px;
  padding:14px 48px;background:rgba(255,255,255,.92);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--border-1);
}
.tc-brand{display:flex;align-items:center;gap:12px;cursor:pointer}
.tc-brand img{width:42px;height:42px;object-fit:contain}
.tc-brand-zh{font:700 16px/1.1 var(--font-zh);color:var(--fg-1)}
.tc-brand-en{font:600 10px var(--font-display);letter-spacing:.16em;color:var(--brand-leaf-green-d);text-transform:uppercase;margin-top:2px}
.tc-links{display:flex;gap:30px;margin-left:auto}
.tc-links a{font:500 14px var(--font-zh);color:var(--fg-2);cursor:pointer;padding:8px 0;position:relative;transition:color .24s var(--ease-out)}
.tc-links a:hover{color:var(--fg-1)}
.tc-links a.active{color:var(--brand-leaf-green-d)}
.tc-links a.active::after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;background:var(--brand-leaf-green);border-radius:2px}

.tc-btn{
  display:inline-flex;align-items:center;gap:6px;
  padding:10px 22px;border-radius:var(--r-pill);
  font:600 13px var(--font-sans);cursor:pointer;border:none;
  transition:all .24s var(--ease-out);
}
.tc-btn-lg{padding:14px 28px;font-size:14px}
.tc-btn-primary{background:var(--brand-leaf-green);color:#fff;box-shadow:var(--shadow-glow-green)}
.tc-btn-primary:hover{background:var(--brand-leaf-green-d);transform:translateY(-1px)}
.tc-btn-ghost{background:transparent;color:var(--fg-1);border:1.5px solid var(--border-2)}
.tc-btn-ghost:hover{border-color:var(--brand-leaf-green);color:var(--brand-leaf-green-d)}

/* ============================================================
   HERO — 3D-Magic style, two avatars flanking centered title,
   gentle floating + breathing animation
   ============================================================ */
.tc-hero{
  position:relative;min-height:680px;
  padding:40px 0 60px;overflow:hidden;background:#fff;
  isolation:isolate;
}
.tc-hero::before{
  content:"";position:absolute;inset:0;z-index:0;
  background:
    radial-gradient(60% 50% at 50% 35%, rgba(79,195,220,.10), transparent 70%),
    radial-gradient(50% 40% at 50% 95%, rgba(94,185,71,.10), transparent 70%);
}
/* soft blob behind each avatar */
.tc-hero-blob{
  position:absolute;top:50%;width:560px;height:560px;border-radius:50%;
  filter:blur(60px);z-index:0;pointer-events:none;
  transform:translateY(-50%);
}
.tc-hero-blob-l{left:-140px;background:radial-gradient(circle, rgba(79,195,220,.32), transparent 65%)}
.tc-hero-blob-r{right:-140px;background:radial-gradient(circle, rgba(94,185,71,.30), transparent 65%)}

.tc-hero-stage{
  position:relative;z-index:1;
  max-width:1480px;margin:0 auto;height:620px;
  display:grid;grid-template-columns:1fr minmax(540px, 620px) 1fr;
  align-items:center;
}

.tc-hero-char{
  position:relative;height:100%;display:flex;align-items:flex-end;justify-content:center;
}
.tc-hero-char-img{
  height:580px;width:auto;object-fit:contain;object-position:bottom center;
  filter:drop-shadow(0 30px 50px rgba(15,44,74,.15));
}
.tc-hero-char-l .tc-hero-char-img{animation:float-l 7s ease-in-out infinite}
.tc-hero-char-r .tc-hero-char-img{animation:float-r 8s ease-in-out infinite}

/* Head-turn / look-around — applied to inner wrapper so floats compose */
.tc-hero-char-l .tc-hero-char-img{transform-origin:50% 90%}
.tc-hero-char-r .tc-hero-char-img{transform-origin:50% 90%}

/* Female cutout: subtle head-turn left-right (mimics looking around) */
.tc-hero-char-img-female{
  animation:look-around-r 9s ease-in-out infinite !important;
}

@keyframes look-around-r{
  0%   {transform:translateY(0)    rotate(.5deg)}
  20%  {transform:translateY(-6px) rotate(-1.5deg)}    /* glance left */
  40%  {transform:translateY(-12px) rotate(.6deg)}
  55%  {transform:translateY(-8px) rotate(2.2deg)}     /* glance right */
  75%  {transform:translateY(-4px) rotate(-.4deg)}
  100% {transform:translateY(0)    rotate(.5deg)}
}

@keyframes float-l{
  0%,100%{transform:translateY(0) rotate(-.4deg)}
  50%{transform:translateY(-14px) rotate(.6deg)}
}
@keyframes float-r{
  0%,100%{transform:translateY(0) rotate(.5deg)}
  50%{transform:translateY(-12px) rotate(-.5deg)}
}

/* circular masked photo for the female (anchor shot has busy bg) */
.tc-hero-portrait{
  width:380px;height:520px;
  border-radius:190px 190px 60px 60px / 240px 240px 60px 60px;
  overflow:hidden;position:relative;
  box-shadow:
    0 30px 60px rgba(15,44,74,.18),
    inset 0 0 0 6px rgba(255,255,255,.9);
  animation:float-r 8s ease-in-out infinite;
}
.tc-hero-portrait::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg, transparent 60%, rgba(255,255,255,.06) 100%);
  pointer-events:none;
}
.tc-hero-portrait img{width:100%;height:100%;object-fit:cover;object-position:center top}

/* ambient cloud chips floating in the hero */
.tc-hero-chip{
  position:absolute;display:flex;align-items:center;gap:8px;
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(8px);
  border:1px solid var(--border-1);
  border-radius:var(--r-pill);
  padding:8px 14px 8px 8px;
  font:500 12px var(--font-zh);color:var(--fg-1);
  box-shadow:var(--shadow-md);
}
.tc-hero-chip .dot{
  width:24px;height:24px;border-radius:50%;display:grid;place-items:center;
  font-size:13px;color:#fff;
}
.tc-hero-chip-1{top:18%;left:14%;animation:bob 6s ease-in-out infinite}
.tc-hero-chip-2{top:62%;left:6%;animation:bob 7s ease-in-out -2s infinite}
.tc-hero-chip-3{top:14%;right:13%;animation:bob 7s ease-in-out -1s infinite}
.tc-hero-chip-4{top:60%;right:5%;animation:bob 6s ease-in-out -3s infinite}
@keyframes bob{
  0%,100%{transform:translateY(0)}
  50%{transform:translateY(-10px)}
}
.tc-hero-chip .dot.green{background:var(--brand-leaf-green)}
.tc-hero-chip .dot.blue{background:var(--brand-cloud-blue)}
.tc-hero-chip .dot.amber{background:var(--brand-amber)}
.tc-hero-chip .dot.navy{background:var(--brand-navy)}

/* center copy block */
.tc-hero-center{
  position:relative;z-index:2;text-align:center;padding:0 24px;
  display:flex;flex-direction:column;align-items:center;gap:24px;
}
.tc-hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px 6px 6px;border-radius:var(--r-pill);
  background:rgba(255,255,255,.92);
  border:1px solid var(--border-1);
  font:600 11px var(--font-sans);letter-spacing:.16em;text-transform:uppercase;
  color:var(--brand-leaf-green-d);
  box-shadow:var(--shadow-sm);
}
.tc-hero-eyebrow .pulse{
  width:18px;height:18px;border-radius:50%;
  background:var(--brand-leaf-green);
  display:grid;place-items:center;color:#fff;font-size:9px;
  position:relative;
}
.tc-hero-eyebrow .pulse::before{
  content:"";position:absolute;inset:-3px;border-radius:50%;
  border:2px solid var(--brand-leaf-green);
  animation:pulse-ring 2s ease-out infinite;
}
@keyframes pulse-ring{
  0%{transform:scale(.8);opacity:1}
  100%{transform:scale(1.6);opacity:0}
}

.tc-hero-title{
  font:400 60px/1.1 var(--font-display);
  letter-spacing:-.012em;margin:0;color:var(--fg-1);
}
.tc-hero-line-1{display:block;font-family:var(--font-zh);font-weight:400;color:var(--n-700);font-size:.78em}
.tc-hero-line-2{display:block;font-family:var(--font-zh);font-weight:700;margin-top:8px}
.tc-grad-text{
  background:var(--grad-twin);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.tc-hero-plus{font-size:.45em;color:var(--brand-leaf-green);margin-left:4px;vertical-align:super;font-weight:700}

.tc-hero-sub{
  font:400 16px/1.75 var(--font-zh);color:var(--fg-2);
  margin:0;max-width:480px;
}
.tc-hero-sub-en{
  font:400 13px/1.5 var(--font-display);color:var(--fg-3);
  margin-top:4px;letter-spacing:.01em;
}

.tc-hero-cta-row{display:flex;align-items:center;gap:14px;margin-top:6px}
.tc-hero-cta{
  display:inline-flex;align-items:center;gap:10px;
  padding:10px 26px 10px 10px;
  background:#fff;border:1.5px solid var(--border-2);
  border-radius:var(--r-pill);
  font:600 14px var(--font-zh);color:var(--fg-1);
  cursor:pointer;
  transition:all .24s var(--ease-out);
  box-shadow:var(--shadow-sm);
}
.tc-hero-cta:hover{border-color:var(--brand-leaf-green);transform:translateY(-1px);box-shadow:var(--shadow-md)}
.tc-hero-cta-icon{
  width:30px;height:30px;border-radius:50%;
  background:var(--grad-twin);color:#fff;
  display:grid;place-items:center;font-size:11px;padding-left:2px;
}
.tc-hero-cta-ghost{
  display:inline-flex;align-items:center;gap:6px;
  padding:12px 22px;background:transparent;border:none;
  font:500 14px var(--font-zh);color:var(--fg-2);cursor:pointer;
}
.tc-hero-cta-ghost:hover{color:var(--brand-leaf-green-d)}

/* speech bubble decorations near each avatar */
.tc-bubble{
  position:absolute;background:#fff;border:1px solid var(--border-1);
  border-radius:14px 14px 14px 4px;padding:8px 12px;
  font:500 12px var(--font-zh);color:var(--fg-1);
  box-shadow:var(--shadow-md);white-space:nowrap;
  display:flex;align-items:center;gap:6px;
}
.tc-bubble.right{border-radius:14px 14px 4px 14px}
.tc-bubble .typing{display:inline-flex;gap:3px;margin-left:4px}
.tc-bubble .typing span{
  width:5px;height:5px;border-radius:50%;background:var(--brand-leaf-green);
  animation:typing 1.4s ease-in-out infinite;
}
.tc-bubble .typing span:nth-child(2){animation-delay:.2s;background:var(--brand-cloud-blue)}
.tc-bubble .typing span:nth-child(3){animation-delay:.4s;background:var(--brand-amber)}
@keyframes typing{
  0%,60%,100%{transform:translateY(0);opacity:.4}
  30%{transform:translateY(-3px);opacity:1}
}
.tc-bubble-l{top:20%;right:-8px;animation:bob 6s -1s ease-in-out infinite}
.tc-bubble-r{top:24%;left:-8px;animation:bob 7s -2s ease-in-out infinite}

/* center floating cloud-mark */
.tc-hero-cloud{
  position:absolute;top:8%;left:50%;transform:translateX(-50%);
  width:88px;height:auto;z-index:3;
  filter:drop-shadow(0 14px 30px rgba(94,185,71,.35));
  animation:float-cloud 6s ease-in-out infinite;
}
@keyframes float-cloud{
  0%,100%{transform:translateX(-50%) translateY(0) rotate(-2deg)}
  50%{transform:translateX(-50%) translateY(-10px) rotate(2deg)}
}

/* ============================================================
   Section primitives
   ============================================================ */
.tc-section{padding:96px 48px;max-width:1280px;margin:0 auto}
.tc-section-alt{background:var(--bg-2);max-width:none;padding:96px 48px}
.tc-section-alt > .tc-section-inner{max-width:1280px;margin:0 auto}
.tc-section-navy{background:var(--grad-navy-deep);max-width:none;padding:96px 48px;color:#fff}
.tc-section-navy > .tc-section-inner{max-width:1280px;margin:0 auto}

.tc-section-head{text-align:center;max-width:760px;margin:0 auto 56px}
.tc-section-head h2{font:700 44px/1.15 var(--font-display);letter-spacing:-.012em;margin:14px 0 16px}
.tc-on-dark h2{color:#fff}
.tc-eyebrow{
  font:600 11px var(--font-sans);letter-spacing:.16em;text-transform:uppercase;
  color:var(--brand-leaf-green-d);
}
.tc-on-dark .tc-eyebrow{color:var(--brand-amber-l)}
.tc-lead{font:400 17px/1.7 var(--font-zh);color:var(--fg-2)}
.tc-on-dark .tc-lead{color:rgba(255,255,255,.72)}

/* ============================================================
   Pillars (3 core advantages)
   ============================================================ */
.tc-pillar-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.tc-pillar-card{
  position:relative;background:#fff;border:1px solid var(--border-1);
  border-radius:var(--r-cloud);padding:36px 30px;text-align:center;
  transition:all .24s var(--ease-out);box-shadow:var(--shadow-sm);
}
.tc-pillar-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:var(--brand-leaf-green-l)}
.tc-pillar-icon-wrap{
  width:96px;height:96px;margin:0 auto 22px;border-radius:50%;
  overflow:hidden;box-shadow:var(--shadow-glow-green);
  position:relative;
}
.tc-pillar-icon-wrap img{width:100%;height:100%;object-fit:cover}
.tc-pillar-en{font:600 11px var(--font-sans);letter-spacing:.16em;text-transform:uppercase;color:var(--brand-leaf-green-d);margin-bottom:6px}
.tc-pillar-card h3{font:700 22px/1.3 var(--font-zh);margin:0 0 12px;color:var(--fg-1)}
.tc-pillar-card p{font:400 14px/1.75 var(--font-zh);color:var(--fg-2);margin:0}
.tc-pillar-num{
  position:absolute;top:18px;right:22px;
  font:700 14px var(--font-display);color:var(--n-300);
}

/* ============================================================
   Services (4 cards, list-card layout)
   ============================================================ */
.tc-service-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.tc-service-card{
  display:grid;grid-template-columns:200px 1fr;gap:0;
  background:#fff;border:1px solid var(--border-1);
  border-radius:var(--r-lg);overflow:hidden;
  transition:all .24s var(--ease-out);
}
.tc-service-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-2px);border-color:var(--brand-leaf-green-l)}
.tc-service-img{background:var(--bg-3);position:relative}
.tc-service-img img{width:100%;height:100%;object-fit:cover}
.tc-service-body{padding:22px 24px;display:flex;flex-direction:column;justify-content:center;gap:6px}
.tc-service-eyebrow{font:600 11px var(--font-zh);color:var(--brand-amber-d);letter-spacing:.04em}
.tc-service-body h4{font:700 19px/1.3 var(--font-zh);margin:0;color:var(--fg-1)}
.tc-service-body p{font:400 13px/1.65 var(--font-zh);color:var(--fg-2);margin:0}
.tc-service-link{font:600 12px var(--font-sans);color:var(--brand-leaf-green-d);cursor:pointer;margin-top:4px}
.tc-service-link:hover{text-decoration:underline}

/* ============================================================
   Features on navy (3 column)
   ============================================================ */
.tc-feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.tc-feature-card{
  background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.10);
  border-radius:var(--r-lg);padding:28px 24px;color:#fff;backdrop-filter:blur(8px);
  transition:all .24s var(--ease-out);
}
.tc-feature-card:hover{background:rgba(255,255,255,.08);transform:translateY(-2px)}
.tc-feature-img{aspect-ratio:1/1;margin-bottom:18px;background:rgba(255,255,255,.04);border-radius:var(--r-md);overflow:hidden;display:flex;align-items:center;justify-content:center}
.tc-feature-img img{width:100%;height:100%;object-fit:cover}
.tc-feature-card h4{font:700 20px/1.3 var(--font-zh);margin:0 0 8px;color:#fff}
.tc-feature-card p{font:400 13px/1.65 var(--font-zh);color:rgba(255,255,255,.72);margin:0}

/* ============================================================
   Use cases (3 cards: cultural / huhu / retail)
   ============================================================ */
.tc-usecase-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.tc-usecase-card{
  display:flex;flex-direction:column;gap:14px;
  cursor:pointer;text-decoration:none;color:inherit;
  transition:transform .24s var(--ease-out);
}
.tc-usecase-card:hover{transform:translateY(-4px)}
.tc-usecase-img{
  aspect-ratio:1/1;border-radius:var(--r-cloud);overflow:hidden;
  background:var(--bg-3);position:relative;
}
.tc-usecase-img img{width:100%;height:100%;object-fit:cover;transition:transform .48s var(--ease-out)}
.tc-usecase-card:hover .tc-usecase-img img{transform:scale(1.05)}
.tc-usecase-en{font:600 11px var(--font-sans);letter-spacing:.16em;text-transform:uppercase;color:var(--brand-leaf-green-d);display:flex;align-items:center;gap:8px}
.tc-usecase-card h3{font:700 22px/1.3 var(--font-zh);margin:0;color:var(--fg-1);display:flex;align-items:center;gap:8px}
.tc-usecase-card p{font:400 14px/1.75 var(--font-zh);color:var(--fg-2);margin:0}

/* HUHU badge layered on top of the card image */
.tc-huhu-badge{
  position:absolute;left:18px;top:18px;z-index:2;
  display:flex;align-items:center;gap:10px;
  padding:8px 14px 8px 8px;
  background:rgba(255,255,255,.95);
  backdrop-filter:blur(8px);
  border-radius:var(--r-pill);
  box-shadow:var(--shadow-md);
}
.tc-huhu-badge img{width:34px;height:34px;border-radius:8px;object-fit:cover}
.tc-huhu-badge-text{display:flex;flex-direction:column;line-height:1.1}
.tc-huhu-badge-text b{font:700 13px var(--font-display);color:var(--fg-1);letter-spacing:.02em}
.tc-huhu-badge-text span{font:500 9px var(--font-sans);letter-spacing:.14em;text-transform:uppercase;color:var(--brand-leaf-green-d);margin-top:1px}

.tc-huhu-link-arrow{
  margin-left:auto;display:inline-flex;align-items:center;gap:4px;
  font:600 11px var(--font-sans);letter-spacing:.06em;color:var(--brand-leaf-green-d);
  background:var(--brand-leaf-green-l);padding:3px 8px 3px 9px;border-radius:var(--r-pill);
}

/* ============================================================
   Retail mockup card (extra detail panel)
   ============================================================ */
.tc-mockup-row{
  display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center;
  margin-top:80px;
  background:linear-gradient(135deg, #FFFFFF 0%, #F4FAFF 60%, #EAF7E5 100%);
  border:1px solid var(--border-1);border-radius:var(--r-cloud);padding:48px;
}
.tc-mockup-row .copy h3{font:700 32px/1.2 var(--font-zh);margin:8px 0 14px}
.tc-mockup-row .copy p{font:400 15px/1.75 var(--font-zh);color:var(--fg-2);margin:0 0 20px;max-width:480px}
.tc-mockup-stats{display:grid;grid-template-columns:repeat(3,auto);gap:24px}
.tc-mockup-stats .stat b{display:block;font:700 28px/1 var(--font-display);color:var(--brand-leaf-green-d)}
.tc-mockup-stats .stat span{font:500 12px var(--font-zh);color:var(--fg-2);margin-top:4px;display:block}
.tc-mockup-img{
  border-radius:var(--r-lg);overflow:hidden;background:#fff;
  box-shadow:var(--shadow-lg);
}

/* ============================================================
   HUHU promo strip
   ============================================================ */
.tc-huhu-strip{
  background:
    linear-gradient(120deg, rgba(79,195,220,.10), rgba(94,185,71,.10)),
    #fff;
  border:1px solid var(--border-1);
  border-radius:var(--r-cloud);
  padding:36px 40px;
  display:grid;grid-template-columns:auto 1fr auto;gap:32px;align-items:center;
  margin-top:64px;
}
.tc-huhu-strip-logo{
  width:88px;height:88px;border-radius:22px;overflow:hidden;
  box-shadow:var(--shadow-md);
}
.tc-huhu-strip-logo img{width:100%;height:100%;object-fit:cover}
.tc-huhu-strip h3{font:700 26px/1.25 var(--font-zh);margin:0 0 6px;display:flex;align-items:center;gap:10px}
.tc-huhu-strip h3 .plus{
  font:700 14px var(--font-display);color:#fff;
  background:var(--brand-leaf-green);padding:2px 8px;border-radius:var(--r-sm);
  letter-spacing:.04em;
}
.tc-huhu-strip p{font:400 14px/1.6 var(--font-zh);color:var(--fg-2);margin:0;max-width:540px}
.tc-huhu-strip .url{
  display:inline-flex;align-items:center;gap:4px;
  font:600 12px var(--font-mono);color:var(--brand-leaf-green-d);
  margin-top:6px;
}

/* ============================================================
   Contact
   ============================================================ */
.tc-contact{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:start}
.tc-contact-copy h2{font:700 40px/1.2 var(--font-display);margin:12px 0 16px}
.tc-contact-meta{margin-top:32px;display:grid;grid-template-columns:1fr 1fr;gap:18px 24px}
.tc-contact-meta div{font:400 14px/1.55 var(--font-zh);color:var(--fg-2)}
.tc-contact-meta b{display:block;font:600 11px var(--font-sans);letter-spacing:.14em;text-transform:uppercase;color:var(--brand-leaf-green-d);margin-bottom:4px}
.tc-contact-form{background:var(--bg-2);border-radius:var(--r-cloud);padding:36px;display:flex;flex-direction:column;gap:18px;border:1px solid var(--border-1)}
.tc-field{display:flex;flex-direction:column;gap:6px}
.tc-field label{font:500 12px var(--font-sans);color:var(--fg-2)}
.tc-field input, .tc-field textarea{
  font:400 14px/1.5 var(--font-sans);padding:12px 14px;
  border:1.5px solid var(--border-1);border-radius:var(--r-sm);
  background:#fff;outline:none;color:var(--fg-1);
  transition:border-color .24s;resize:none;
}
.tc-field input:focus, .tc-field textarea:focus{
  border-color:var(--brand-leaf-green);box-shadow:0 0 0 3px rgba(94,185,71,.15);
}
.tc-field-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.tc-check{display:flex;align-items:flex-start;gap:8px;font:400 13px/1.5 var(--font-zh);color:var(--fg-2)}
.tc-check input{margin-top:3px}

/* ============================================================
   Footer
   ============================================================ */
.tc-footer{background:var(--brand-navy);color:rgba(255,255,255,.72);padding:64px 48px 24px}
.tc-footer-inner{max-width:1280px;margin:0 auto;display:grid;grid-template-columns:1fr 2fr;gap:48px;padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,.1)}
.tc-footer-brand{display:flex;align-items:center;gap:14px}
.tc-footer-brand img{width:52px;height:52px;filter:brightness(1.1)}
.tc-footer-tagline{font:400 13px/1.6 var(--font-zh);color:rgba(255,255,255,.5);margin-top:14px;max-width:280px}
.tc-footer-cols{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.tc-footer-cols b{display:block;font:600 13px var(--font-sans);color:#fff;margin-bottom:14px}
.tc-footer-cols a, .tc-footer-cols span{display:block;font:400 13px/1.9 var(--font-zh);color:rgba(255,255,255,.60);cursor:pointer;text-decoration:none}
.tc-footer-cols a:hover{color:var(--brand-leaf-green-l)}
.tc-footer-base{max-width:1280px;margin:0 auto;padding-top:24px;display:flex;justify-content:space-between;font:400 12px var(--font-zh);color:rgba(255,255,255,.4);gap:24px;flex-wrap:wrap}

/* ============================================================
   Stats banner between sections
   ============================================================ */
.tc-stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:0;
  background:#fff;border-top:1px solid var(--border-1);border-bottom:1px solid var(--border-1);
}
.tc-stat{
  padding:36px 24px;text-align:center;
  border-right:1px solid var(--border-1);
}
.tc-stat:last-child{border-right:none}
.tc-stat b{display:block;font:700 36px/1 var(--font-display);color:var(--fg-1);letter-spacing:-.01em}
.tc-stat b .grad{background:var(--grad-twin);-webkit-background-clip:text;background-clip:text;color:transparent}
.tc-stat span{display:block;margin-top:8px;font:500 13px var(--font-zh);color:var(--fg-2)}
.tc-stat em{display:block;margin-top:2px;font:500 10px var(--font-sans);letter-spacing:.16em;text-transform:uppercase;color:var(--brand-leaf-green-d);font-style:normal}

/* ============================================================
   Research / R&D section
   ============================================================ */
.tc-research-row{display:grid;grid-template-columns:1fr;gap:32px;margin-bottom:64px}
.tc-paper-card{
  display:grid;grid-template-columns:380px 1fr;gap:0;
  background:#fff;border:1px solid var(--border-1);
  border-radius:var(--r-cloud);overflow:hidden;
  transition:all .24s var(--ease-out);box-shadow:var(--shadow-sm);
}
.tc-paper-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-2px)}
.tc-paper-img{
  position:relative;background:#FBE9EE;
  display:flex;align-items:center;justify-content:center;padding:24px;
}
.tc-paper-img img{width:100%;height:auto;border-radius:var(--r-sm);box-shadow:var(--shadow-md)}
.tc-paper-badge{
  position:absolute;top:14px;left:14px;
  font:600 9px var(--font-sans);letter-spacing:.16em;text-transform:uppercase;
  color:#0F2C4A;background:rgba(255,255,255,.92);
  padding:5px 9px;border-radius:var(--r-pill);
  box-shadow:var(--shadow-sm);
}
.tc-paper-body{padding:32px 36px;display:flex;flex-direction:column;gap:14px;justify-content:center}
.tc-paper-body h3{font:700 24px/1.3 var(--font-display);margin:4px 0;color:var(--fg-1)}
.tc-paper-meta{display:grid;grid-template-columns:1fr;gap:6px}
.tc-paper-meta div{font:400 13px/1.55 var(--font-zh);color:var(--fg-2)}
.tc-paper-meta b{display:inline-block;width:46px;font:600 10px var(--font-sans);letter-spacing:.14em;text-transform:uppercase;color:var(--brand-leaf-green-d);margin-right:6px}
.tc-paper-tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:4px}
.tc-tag{
  font:500 11px var(--font-sans);letter-spacing:.04em;
  padding:4px 10px;border-radius:var(--r-pill);
  background:var(--bg-3);color:var(--fg-2);
}
.tc-paper-link{
  margin-top:8px;font:600 13px var(--font-sans);
  color:var(--brand-leaf-green-d);text-decoration:none;
}
.tc-paper-link:hover{text-decoration:underline}

.tc-partner-row{
  background:#fff;border:1px solid var(--border-1);
  border-radius:var(--r-cloud);padding:36px 40px;
  display:grid;grid-template-columns:280px 1fr;gap:40px;align-items:center;
}
.tc-partner-head h4{font:700 22px/1.3 var(--font-zh);margin:8px 0 0;color:var(--fg-1)}
.tc-partner-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.tc-partner-chip{
  background:var(--bg-2);border:1px solid var(--border-1);
  border-radius:var(--r-md);padding:14px 16px;
  display:flex;flex-direction:column;gap:2px;
  transition:all .24s var(--ease-out);
}
.tc-partner-chip:hover{border-color:var(--brand-leaf-green-l);background:#fff;transform:translateY(-2px)}
.tc-partner-chip b{font:700 14px var(--font-zh);color:var(--fg-1)}
.tc-partner-chip span{font:500 11px var(--font-sans);letter-spacing:.04em;color:var(--fg-3);text-transform:uppercase}

@media (max-width:1100px){
  .tc-hero-stage{grid-template-columns:1fr;height:auto}
  .tc-hero-char{height:380px;opacity:.6}
}