/* =========================================================================
   LingQi Landing — B2B light tech theme, blue accent
   Aligned to Figma node 1:2 (https://figma.com/design/2bsI5jCN2Q6cBPf6ijXnfi)
   ========================================================================= */
:root {
  /* primary */
  --blue:        #155dfc;
  --blue-deep:   #1447e6;
  --blue-soft:   #2b7fff;
  --blue-pale:   #eff6ff;
  --blue-border: #bedbff;

  /* greys (Figma slate scale) */
  --bg:          #f8fafc;
  --bg-alt:      #f1f5f9;
  --card:        #ffffff;
  --bd:          #e2e8f0;
  --bd-strong:   #cad5e2;

  --text:        #0f172b;
  --text-mid:    #314158;
  --text-body:   #45556c;
  --text-mute:   #62748e;
  --text-faint:  #90a1b9;

  /* footer */
  --footer-bg:   #0f172b;
  --footer-bd:   #1d293d;

  /* status */
  --green:       #008236;
  --green-soft:  #b9f8cf;
  --green-pale:  #f0fdf4;
  --red:         #e11d48;
  --red-soft:    rgba(225, 29, 72, 0.45);

  /* scan demo */
  --scan-bg:     #0a1428;
  --scan-grid:   rgba(99, 153, 255, 0.10);
  --scan-line:   #00e5ff;

  --shadow-sm:   0 1px 2px rgba(15, 23, 43, 0.04);
  --shadow-md:   0 4px 16px rgba(15, 23, 43, 0.06);
  --shadow-lg:   0 12px 40px rgba(15, 23, 43, 0.10);
  --shadow-blue: 0 8px 24px rgba(21, 93, 252, 0.18);

  --font-body:   'Inter', 'Noto Sans SC', system-ui, sans-serif;
  --font-mono:   'JetBrains Mono', 'Consolas', monospace;
  --font-serif:  'Georgia', serif;

  --radius:      12px;
  --radius-sm:   8px;
  --radius-lg:   18px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: var(--blue); text-decoration: none; transition: color .2s; }
a:hover { color: var(--blue-deep); }

h1, h2, h3, h4 { color: var(--text); font-weight: 700; letter-spacing: -0.015em; margin: 0; line-height: 1.2; }
.mono { font-family: var(--font-mono); }

/* =========================================================================
   LAYOUT
   ========================================================================= */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 clamp(20px, 4vw, 40px);
}

.section { padding: clamp(56px, 7vw, 96px) 0; }
.section-eyebrow {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1.4px;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 12px;
  text-align: center;
}
.section-title {
  font-size: clamp(26px, 3.4vw, 36px);
  text-align: center;
  margin-bottom: 14px;
}
.section-lead {
  color: var(--text-body);
  font-size: 16px;
  line-height: 1.7;
  max-width: 680px;
  margin: 0 auto 36px;
  text-align: center;
}

/* =========================================================================
   NAV
   ========================================================================= */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: saturate(140%) blur(12px);
  border-bottom: 1px solid var(--bd);
}
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 14px clamp(20px, 4vw, 40px);
  display: flex; align-items: center; gap: 24px;
}
.brand { display: flex; align-items: center; gap: 10px; flex: 0 0 auto; text-decoration: none; }
.brand-logo {
  width: 36px; height: 36px;
  object-fit: contain;
}
.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-zh { font-size: 16px; color: var(--text); font-weight: 700; letter-spacing: -0.5px; }
.brand-en { font-size: 10px; color: var(--text-mute); font-family: var(--font-mono); }

.nav-links {
  display: flex; gap: clamp(14px, 2vw, 28px);
  margin-left: auto;
  font-size: 14px;
}
.nav-links a {
  color: var(--text-body);
  font-weight: 500;
}
.nav-links a:hover { color: var(--blue); }

.nav-actions { display: flex; align-items: center; gap: 12px; margin-left: 16px; }

.lang-toggle {
  display: flex; gap: 0;
  background: var(--bg-alt);
  border: 1px solid var(--bd);
  border-radius: 999px; padding: 3px;
  cursor: pointer;
}
.lang-pill {
  padding: 4px 12px; border-radius: 999px;
  font-size: 12px; font-family: var(--font-mono);
  color: var(--text-mute); transition: all .2s;
}
.lang-pill.active {
  background: var(--blue);
  color: #fff;
  font-weight: 700;
}

/* =========================================================================
   BUTTONS
   ========================================================================= */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 6px;
  padding: 11px 22px;
  border-radius: 8px;
  font-family: var(--font-body); font-weight: 600; font-size: 14px;
  cursor: pointer; border: none;
  transition: all .2s ease;
  text-decoration: none;
}
.btn-primary {
  background: var(--blue);
  color: #fff;
  box-shadow: var(--shadow-blue);
}
.btn-primary:hover {
  background: var(--blue-deep);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 12px 28px rgba(21, 93, 252, 0.28);
}
.btn-ghost {
  background: transparent;
  color: var(--text-mid);
  border: 1px solid var(--bd-strong);
}
.btn-ghost:hover { border-color: var(--blue); color: var(--blue); }

/* =========================================================================
   HERO
   ========================================================================= */
.hero {
  padding: clamp(50px, 7vw, 90px) 0 clamp(40px, 5vw, 70px);
  position: relative;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(30px, 5vw, 64px);
  align-items: start;
}
/* keep some breathing room above the hero-pill so it lines up with the scan window titlebar */
.hero-left { padding-top: 8px; }
@media (max-width: 900px) { .hero-grid { grid-template-columns: 1fr; } }

.hero-pill {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px;
  background: var(--blue-pale);
  border: 1px solid var(--blue-border);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  color: var(--blue-deep);
}
.hero-pill .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--blue);
  box-shadow: 0 0 6px rgba(21, 93, 252, 0.6);
}

.hero-title {
  margin: 22px 0 18px;
  font-size: clamp(34px, 5vw, 60px);
  font-weight: 700;
  letter-spacing: -1.5px;
  line-height: 1.08;
}
.hero-title .accent { color: var(--blue); display: inline-block; }

.hero-lead {
  font-size: 17px;
  line-height: 1.65;
  color: var(--text-body);
  margin: 0 0 28px;
  max-width: 540px;
}

.hero-ctas { display: flex; gap: 12px; flex-wrap: wrap; }

/* Tech-spec strip below CTAs — visually anchors hero-left to the dark scan widget on the right */
.hero-spec {
  list-style: none;
  margin: 28px 0 0;
  padding: 14px 16px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: 18px;
  row-gap: 8px;
  background: linear-gradient(180deg, rgba(21, 93, 252, 0.04), rgba(21, 93, 252, 0.01));
  border: 1px solid var(--bd);
  border-left: 3px solid var(--blue);
  border-radius: 0 8px 8px 0;
  font-size: 12.5px;
  color: var(--text-mid);
  letter-spacing: 0.2px;
}
.hero-spec li {
  display: flex; align-items: center; gap: 8px;
}
.hero-spec-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--blue);
  flex-shrink: 0;
  box-shadow: 0 0 6px rgba(21, 93, 252, 0.55);
  animation: spec-pulse 2.4s ease-in-out infinite;
}
.hero-spec li:nth-child(2) .hero-spec-dot { animation-delay: 0.6s; }
.hero-spec li:nth-child(3) .hero-spec-dot { animation-delay: 1.2s; }
.hero-spec li:nth-child(4) .hero-spec-dot { animation-delay: 1.8s; }
@keyframes spec-pulse {
  0%, 100% { opacity: 0.4; transform: scale(0.85); }
  50%      { opacity: 1;   transform: scale(1.0);  }
}
@media (max-width: 600px) {
  .hero-spec { grid-template-columns: 1fr; }
}

/* ----- Stats row under hero ----- */
.hero-stats {
  margin-top: clamp(40px, 5vw, 64px);
  padding-top: clamp(24px, 3vw, 40px);
  border-top: 1px solid var(--bd);
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(16px, 2vw, 32px);
}
@media (max-width: 700px) { .hero-stats { grid-template-columns: repeat(2, 1fr); } }

.stat-card { text-align: center; }
.stat-num {
  font-size: clamp(26px, 3vw, 32px);
  font-weight: 700;
  color: var(--text);
  letter-spacing: -1px;
  line-height: 1;
}
.stat-num .unit {
  font-size: 0.65em;
  font-weight: 600;
  color: var(--text-mute);
  margin-left: 2px;
}
.stat-label {
  font-size: 13px;
  color: var(--text-mute);
  margin-top: 8px;
}

/* =========================================================================
   AI SCAN DEMO WIDGET (LQ-Vision System) — replaces hero photo
   ========================================================================= */
.scan-window {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--scan-bg);
  box-shadow: var(--shadow-lg);
  border: 1px solid #1c2941;
  font-family: var(--font-mono);
  user-select: none;
  position: relative;
}
.scan-titlebar {
  display: flex; align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: #0d1729;
  border-bottom: 1px solid #1c2941;
}
.scan-traffic { display: flex; gap: 7px; }
.scan-traffic span {
  width: 11px; height: 11px; border-radius: 50%;
}
.scan-traffic span:nth-child(1) { background: #ff5f57; }
.scan-traffic span:nth-child(2) { background: #febc2e; }
.scan-traffic span:nth-child(3) { background: #28c840; }
.scan-titlebar-title {
  margin-left: auto;
  font-size: 12px;
  color: #8b95a8;
  letter-spacing: 1px;
}
.scan-stage {
  position: relative;
  aspect-ratio: 16 / 10;
  background: #050a14;
  overflow: hidden;
}
.scan-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  /* faint dark overlay so red/green annotations pop */
  filter: brightness(0.95) saturate(0.92);
}
.scan-stage::after {
  /* subtle scan-grid overlay so it still feels like a vision system */
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.05) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  mix-blend-mode: overlay;
  opacity: 0.7;
}
.scan-frame-border {
  position: absolute;
  inset: 22px;
  border: 1.5px dashed rgba(199, 210, 254, 0.25);
  border-radius: 8px;
  pointer-events: none;
}
.scan-label {
  position: absolute;
  top: 12px; left: 16px;
  display: inline-flex; align-items: center; gap: 6px;
  padding: 5px 12px;
  background: rgba(5, 10, 21, 0.78);
  border: 1px solid rgba(0, 229, 255, 0.4);
  border-radius: 4px;
  font-size: 12px;
  color: #cbd5e1;
  font-weight: 600;
  font-family: var(--font-mono);
  letter-spacing: 1px;
  z-index: 5;
  backdrop-filter: blur(4px);
}
.scan-label::before {
  content: ""; display: inline-block;
  width: 8px; height: 8px;
  background: var(--scan-line);
  border-radius: 50%;
  box-shadow: 0 0 6px var(--scan-line);
}

.scan-line {
  position: absolute;
  left: 22px; right: 22px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--scan-line) 20%, var(--scan-line) 80%, transparent);
  box-shadow:
    0 0 14px var(--scan-line),
    0 0 28px rgba(0, 229, 255, 0.5);
  top: 22px;
  opacity: 0;
  z-index: 4;
}
.scan-stage.scanning .scan-line {
  opacity: 1;
  animation: scan-move 2.4s ease-in-out forwards;
}
@keyframes scan-move {
  0%   { top: 22px; }
  100% { top: calc(100% - 24px); }
}

/* annotation boxes */
.scan-box {
  position: absolute;
  border-width: 2px;
  border-style: solid;
  border-radius: 4px;
  opacity: 0;
  transform: scale(0.96);
  transition: opacity .35s ease, transform .35s ease;
  z-index: 3;
  overflow: hidden;
}

/* SVG content showing what was scanned inside the bbox */
.scan-box-art {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  opacity: 0;
  transition: opacity .5s ease .15s;
}
.scan-box.shown .scan-box-art { opacity: 1; }
.scan-box.shown { opacity: 1; transform: scale(1); }
.scan-box.defect {
  border-color: #ef4444;
  background: rgba(239, 68, 68, 0.18);
  box-shadow: 0 0 18px rgba(239, 68, 68, 0.35);
}
.scan-box.pass {
  border-color: #22c55e;
  background: rgba(34, 197, 94, 0.18);
  box-shadow: 0 0 18px rgba(34, 197, 94, 0.35);
}
.scan-box-tag {
  position: absolute;
  top: -2px; left: -2px;
  padding: 4px 8px;
  border-radius: 3px 3px 0 0;
  font-size: 11px;
  font-weight: 600;
  font-family: var(--font-mono);
  white-space: nowrap;
  transform: translateY(-100%);
}
.scan-box.defect .scan-box-tag { background: #ef4444; color: #fff; }
.scan-box.pass   .scan-box-tag { background: #22c55e; color: #052e16; }

/* HUD bottom strip */
.scan-hud {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  display: flex; justify-content: space-between;
  padding: 10px 16px;
  background: linear-gradient(180deg, transparent, rgba(5, 10, 21, 0.85));
  font-size: 11px;
  color: #94a3b8;
  letter-spacing: 1px;
  z-index: 6;
}
.scan-hud .live-dot {
  display: inline-block; width: 6px; height: 6px; border-radius: 50%;
  background: #22c55e; box-shadow: 0 0 6px #22c55e;
  margin-right: 6px;
  animation: pulse 1.5s ease-in-out infinite;
}
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.4; } }

/* control bar below window */
.scan-controls {
  display: flex; gap: 10px; margin-top: 14px;
  align-items: center;
}
.scan-btn {
  background: var(--blue);
  color: #fff;
  border: none;
  padding: 9px 16px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all .2s;
  box-shadow: var(--shadow-blue);
}
.scan-btn:hover { background: var(--blue-deep); transform: translateY(-1px); }
.scan-btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }
.scan-btn-ghost {
  background: transparent;
  color: var(--text-mid);
  border: 1px solid var(--bd-strong);
  box-shadow: none;
}
.scan-btn-ghost:hover { background: var(--bg-alt); transform: none; }

.scan-status {
  margin-left: auto;
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--text-mute);
}

/* =========================================================================
   REPORT PANEL (slides in after scan)
   ========================================================================= */
.scan-report {
  margin-top: 12px;
  background: var(--card);
  border: 1px solid var(--bd);
  border-radius: var(--radius);
  padding: 14px 16px;
  box-shadow: var(--shadow-md);
  opacity: 0;
  transform: translateY(8px);
  transition: opacity .4s, transform .4s;
  pointer-events: none;
}
.scan-report.shown { opacity: 1; transform: translateY(0); pointer-events: auto; }
.scan-report-head {
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 12px;
}
.scan-report-head h4 { font-size: 15px; }
.scan-report-status {
  margin-left: auto;
  padding: 4px 10px; border-radius: 6px;
  font-size: 11px; font-weight: 700; font-family: var(--font-mono);
  background: var(--green-pale);
  color: var(--green);
  border: 1px solid var(--green-soft);
}
.scan-report-status.fail {
  background: #fef2f2;
  color: var(--red);
  border-color: rgba(225, 29, 72, 0.3);
}
.scan-report-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 14px;
}
.scan-report-cell {
  background: var(--bg-alt);
  border-radius: 6px;
  padding: 8px 10px;
}
.scan-report-cell .lbl {
  font-size: 10px;
  color: var(--text-mute);
  text-transform: uppercase;
  letter-spacing: 1px;
}
.scan-report-cell .val {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  font-family: var(--font-mono);
  margin-top: 2px;
}
.scan-report-list {
  display: flex; flex-direction: column; gap: 6px;
  font-size: 13px;
  color: var(--text-body);
  font-family: var(--font-mono);
}
.scan-report-list .row {
  display: flex; justify-content: space-between; gap: 12px;
  padding: 5px 8px;
  border-radius: 5px;
  background: var(--bg-alt);
}
.scan-report-list .row .ty.defect { color: var(--red); font-weight: 600; }
.scan-report-list .row .ty.pass   { color: var(--green); font-weight: 600; }

/* =========================================================================
   UNIVERSITY HERITAGE BAND
   ========================================================================= */
.heritage {
  padding: clamp(40px, 6vw, 80px) 0 0;
  margin-top: clamp(20px, 3vw, 40px);
}
.heritage-caption {
  text-align: center;
  font-size: 13px;
  color: var(--text-mute);
  margin-bottom: 24px;
}
.heritage-row {
  display: flex; align-items: center; justify-content: space-around;
  flex-wrap: wrap;
  gap: clamp(20px, 4vw, 50px);
}
.heritage-item {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 4px 8px;
  text-decoration: none;
  filter: grayscale(100%);
  opacity: 0.55;
  transition: filter .25s, opacity .25s, transform .25s;
}
.heritage-item:hover {
  filter: none;
  opacity: 1;
  transform: translateY(-2px);
}
.heritage-item img {
  height: clamp(36px, 4vw, 48px);
  max-width: 110px;
  width: auto;
  object-fit: contain;
}
.heritage-name {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(13px, 1.4vw, 15px);
  color: var(--text-mid);
  letter-spacing: 0.3px;
}

/* =========================================================================
   CAPABILITIES (4 cards in 2x2 / 4-col responsive)
   ========================================================================= */
.cap-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
}
.cap-card {
  background: var(--card);
  border: 1px solid var(--bd);
  border-radius: var(--radius);
  padding: 24px;
  transition: border-color .25s, transform .25s, box-shadow .25s;
}
.cap-card:hover {
  border-color: var(--blue-border);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.cap-icon {
  width: 44px; height: 44px;
  border-radius: 10px;
  background: var(--blue-pale);
  color: var(--blue);
  display: flex; align-items: center; justify-content: center;
  font-size: 22px;
  margin-bottom: 14px;
}
.cap-card h3 { font-size: 17px; margin-bottom: 8px; }
.cap-card p {
  font-size: 14px;
  color: var(--text-body);
  margin: 0;
  line-height: 1.6;
}

/* =========================================================================
   SOLUTIONS (4 image cards)
   ========================================================================= */
.sol-head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 18px; flex-wrap: wrap; gap: 10px; }
.sol-link {
  font-size: 14px; font-weight: 600; color: var(--blue);
}
.sol-link:hover { color: var(--blue-deep); }

.sol-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 18px;
}
.sol-card {
  background: var(--card);
  border: 1px solid var(--bd);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color .25s, transform .25s, box-shadow .25s;
  display: flex; flex-direction: column;
}
.sol-card:hover {
  border-color: var(--blue-border);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.sol-img {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--bg-alt);
}
.sol-img img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform .4s;
}
.sol-card:hover .sol-img img { transform: scale(1.04); }
.sol-body { padding: 18px; flex: 1; }
.sol-body h3 {
  font-size: 16px; margin-bottom: 6px;
  display: flex; align-items: center; justify-content: space-between;
  gap: 8px;
}
.sol-body h3::after {
  content: "→";
  color: var(--blue);
  font-size: 16px;
  font-weight: 400;
  transition: transform .25s;
}
.sol-card:hover .sol-body h3::after { transform: translateX(3px); }
.sol-body p {
  font-size: 13.5px;
  color: var(--text-body);
  margin: 0;
  line-height: 1.55;
}

/* =========================================================================
   TECH STACK MARQUEE
   ========================================================================= */
.section-stack { padding: clamp(50px, 6vw, 80px) 0; }
.marquee {
  margin-top: 28px;
  overflow: hidden;
  position: relative;
  -webkit-mask-image: linear-gradient(90deg, transparent, black 6%, black 94%, transparent);
          mask-image: linear-gradient(90deg, transparent, black 6%, black 94%, transparent);
}
.marquee-track {
  display: flex; gap: 14px;
  animation: marquee 50s linear infinite;
  width: max-content;
  padding: 14px 0;
}
.marquee:hover .marquee-track { animation-play-state: paused; }

@keyframes marquee {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

.tech-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  background: var(--card);
  border: 1px solid var(--bd);
  border-radius: 999px;
  white-space: nowrap;
  font-size: 14px;
  color: var(--text-mid);
  box-shadow: var(--shadow-sm);
  transition: border-color .25s, transform .25s, box-shadow .25s, color .25s;
  flex-shrink: 0;
}
.tech-pill:hover {
  border-color: var(--blue-border);
  color: var(--blue-deep);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.tech-pill img {
  width: 22px;
  height: 22px;
  object-fit: contain;
}
.tech-pill b { font-weight: 600; letter-spacing: -0.2px; }
.tech-pill.accent {
  background: var(--blue-pale);
  border-color: var(--blue-border);
  color: var(--blue-deep);
}
.tech-pill.accent:hover {
  background: #dbeafe;
}

/* Letter-monogram badge for tech without an SVG icon */
.tech-mono {
  width: 22px; height: 22px;
  border-radius: 5px;
  display: inline-flex; align-items: center; justify-content: center;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: #fff;
  background: var(--text-mid);
  flex-shrink: 0;
  letter-spacing: -0.5px;
}
.tech-mono[data-color="orange"]  { background: linear-gradient(135deg, #ff7a3c, #ee4d2c); }
.tech-mono[data-color="amber"]   { background: linear-gradient(135deg, #fbbf24, #f59e0b); color: #422006; }
.tech-mono[data-color="rose"]    { background: linear-gradient(135deg, #fb7185, #e11d48); }
.tech-mono[data-color="navy"]    { background: linear-gradient(135deg, #2b7fff, #155dfc); }
.tech-mono[data-color="purple"]  { background: linear-gradient(135deg, #a78bfa, #7c3aed); }
.tech-mono[data-color="indigo"]  { background: linear-gradient(135deg, #818cf8, #4f46e5); }
.tech-mono[data-color="teal"]    { background: linear-gradient(135deg, #2dd4bf, #0d9488); }
.tech-mono[data-color="violet"]  { background: linear-gradient(135deg, #c084fc, #9333ea); }
.tech-mono[data-color="blue"]    { background: linear-gradient(135deg, #60a5fa, #2563eb); }
.tech-mono[data-color="green"]   { background: linear-gradient(135deg, #4ade80, #16a34a); }

/* =========================================================================
   CASE STUDY (light B2B variant)
   ========================================================================= */
/* Category tabs above the case-frame */
.case-tabs {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
  margin: 8px 0 28px;
}
.case-tab {
  padding: 8px 18px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  background: var(--card);
  color: var(--text-mid);
  border: 1px solid var(--bd);
  cursor: pointer;
  transition: all .2s;
  font-family: var(--font-body);
}
.case-tab:hover { border-color: var(--blue-border); color: var(--blue-deep); }
.case-tab.active {
  background: var(--blue);
  color: #fff;
  border-color: var(--blue);
  box-shadow: var(--shadow-blue);
}

/* Click-through overlay on case image */
.case-image {
  text-decoration: none;
  cursor: pointer;
  display: block;
}
.case-image-overlay {
  position: absolute;
  top: 14px; right: 14px;
  z-index: 3;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--blue-deep);
  font-size: 12px;
  font-weight: 600;
  font-family: var(--font-body);
  letter-spacing: 0.2px;
  backdrop-filter: blur(6px);
  border: 1px solid rgba(21, 93, 252, 0.2);
  opacity: 0;
  transform: translateY(-4px);
  transition: opacity .2s, transform .2s;
  pointer-events: none;
}
.case-image:hover .case-image-overlay {
  opacity: 1;
  transform: translateY(0);
}
.case-image:hover { box-shadow: 0 12px 32px rgba(15, 23, 43, 0.16); }
.case-image:hover img,
.case-image:hover .case-svg-holder { transform: scale(1.015); }
.case-image img,
.case-image .case-svg-holder {
  transition: transform .35s ease;
}

/* SVG holder for cases without a real photo */
.case-svg-holder {
  width: 100%;
  height: 100%;
  display: block;
}
.case-svg-holder svg {
  width: 100%;
  height: 100%;
  display: block;
}

.case-more {
  display: flex;
  justify-content: center;
  margin-top: 30px;
}
.case-more-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 999px;
  background: var(--blue-pale);
  border: 1px solid var(--blue-border);
  color: var(--blue-deep);
  font-size: 13px;
  font-weight: 600;
  transition: background .2s, transform .2s;
}
.case-more-link:hover { background: #dbeafe; transform: translateX(2px); color: var(--blue-deep); }
.case-more-link svg { transition: transform .2s; }
.case-more-link:hover svg { transform: translateX(3px); }

.case-frame {
  display: grid;
  grid-template-columns: 1.65fr 1fr;
  gap: 24px;
  align-items: stretch;
}
@media (max-width: 900px) { .case-frame { grid-template-columns: 1fr; } }

.case-image {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--bd);
  background: #0a1428;
  box-shadow: var(--shadow-md);
  min-height: 320px;
}
.case-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #0a1428;
  display: block;
}
.case-badge {
  position: absolute;
  top: 14px; left: 14px;
  padding: 5px 12px;
  border-radius: 6px;
  background: var(--blue);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  font-family: var(--font-mono);
  letter-spacing: 1.5px;
  z-index: 2;
  box-shadow: var(--shadow-blue);
}
.case-stripe {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 12px 16px;
  background: linear-gradient(180deg, transparent, rgba(5, 10, 21, 0.92));
  color: #cbd5e1;
  font-size: 12px;
  font-style: italic;
  font-family: var(--font-mono);
}

.case-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.case-stat {
  background: var(--card);
  border: 1px solid var(--bd);
  border-radius: var(--radius);
  padding: 18px 16px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  transition: border-color .25s, transform .25s, box-shadow .25s;
}
.case-stat:hover {
  border-color: var(--blue-border);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.case-stat-num {
  font-size: clamp(22px, 2.4vw, 28px);
  font-weight: 700;
  color: var(--blue);
  letter-spacing: -0.5px;
  line-height: 1;
  font-family: var(--font-mono);
}
.case-stat-num .case-unit {
  font-size: 0.6em;
  color: var(--text-mute);
  margin-left: 2px;
}
.case-stat-label {
  margin-top: 8px;
  font-size: 12px;
  color: var(--text-mute);
  letter-spacing: 0.5px;
}

/* =========================================================================
   CONTACT
   ========================================================================= */
.section-contact {
  background: linear-gradient(180deg, var(--bg-alt), var(--bg));
}
.contact-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 24px;
}
@media (max-width: 800px) { .contact-grid { grid-template-columns: 1fr; } }

.contact-card {
  background: var(--card);
  border: 1px solid var(--bd);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}
.contact-row {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--bd);
  font-size: 14px;
  align-items: center;
}
.contact-row:last-child { border-bottom: none; }
.contact-row .lbl { color: var(--text-mute); font-size: 11px; letter-spacing: 1.5px; text-transform: uppercase; font-family: var(--font-mono); }
.contact-row .val { color: var(--text); font-family: var(--font-mono); }
.contact-row .val.link { color: var(--blue); }

/* Inquiry form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.form-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
@media (max-width: 540px) { .form-grid-2 { grid-template-columns: 1fr; } }

.form-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.form-lbl {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-mid);
  letter-spacing: 0;
}
.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--bd);
  border-radius: 8px;
  padding: 10px 14px;
  outline: none;
  transition: border-color .15s, box-shadow .15s;
}
.contact-form textarea {
  resize: vertical;
  min-height: 96px;
  line-height: 1.55;
}
.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(21, 93, 252, 0.12);
}
.contact-form input::placeholder,
.contact-form textarea::placeholder {
  color: var(--text-faint);
}

.form-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 4px;
}
.form-hint {
  font-size: 12px;
  color: var(--text-mute);
  letter-spacing: 0.1px;
}
.form-status {
  margin-top: 4px;
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 13px;
}
.form-status.ok {
  background: var(--green-pale);
  color: var(--green);
  border: 1px solid var(--green-soft);
}
.form-status.err {
  background: #fef2f2;
  color: var(--red);
  border: 1px solid rgba(225, 29, 72, 0.3);
}

.contact-cta {
  background:
    radial-gradient(ellipse 80% 50% at 30% 0%, rgba(255,255,255,0.12), transparent 70%),
    linear-gradient(135deg, var(--blue), var(--blue-deep));
  color: #fff;
  border: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
  position: relative;
  overflow: hidden;
}
.contact-cta::before {
  content: "";
  position: absolute;
  top: -40px; right: -40px;
  width: 180px; height: 180px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255,255,255,0.10), transparent 70%);
  pointer-events: none;
}
.cta-eyebrow {
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: rgba(255,255,255,0.65);
  font-weight: 600;
}
.contact-cta h3 {
  color: #fff;
  font-size: 22px;
  letter-spacing: -0.5px;
  line-height: 1.25;
}
.contact-cta p {
  color: rgba(255,255,255,0.82);
  font-size: 14px;
  line-height: 1.6;
  margin: 0;
}
.cta-list {
  list-style: none;
  margin: 6px 0 4px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.cta-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  color: rgba(255,255,255,0.92);
}
.cta-ico {
  width: 18px; height: 18px;
  flex-shrink: 0;
  color: #fff;
  opacity: 0.85;
}
.contact-cta .btn-light,
.contact-cta .cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #fff;
  color: var(--blue-deep);
  align-self: flex-start;
  padding: 11px 22px;
  border-radius: 8px;
  font-weight: 600; font-size: 14px;
  border: none;
  cursor: pointer;
  transition: transform .2s, box-shadow .2s;
  margin-top: auto;
}
.contact-cta .btn-light:hover,
.contact-cta .cta-btn:hover {
  background: #fff;
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.18);
}

/* =========================================================================
   FOOTER (dark)
   ========================================================================= */
.footer {
  background: var(--footer-bg);
  color: #cbd5e1;
  padding: 56px 0 24px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 36px;
}
@media (max-width: 800px) { .footer-grid { grid-template-columns: 1fr 1fr; } }

.footer-brand { display: flex; flex-direction: column; gap: 14px; max-width: 320px; }
.footer-brand .brand { color: #fff; }
.footer-brand .brand-zh { color: #fff; }
.footer-brand p { font-size: 13px; color: #94a3b8; line-height: 1.6; margin: 0; }

.footer-col h5 {
  color: #fff;
  font-size: 14px;
  margin-bottom: 14px;
  font-weight: 600;
}
.footer-col ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 8px; }
.footer-col li { font-size: 13px; color: #94a3b8; line-height: 1.55; }
.footer-col a { color: #94a3b8; font-size: 13px; }
.footer-col a:hover { color: #fff; }

/* Footer address link with location pin */
.footer-addr {
  display: inline-flex;
  align-items: flex-start;
  gap: 6px;
  text-decoration: none;
}
.footer-addr svg {
  flex-shrink: 0;
  margin-top: 3px;
  color: var(--blue-soft);
  opacity: 0.85;
}
.footer-addr:hover svg { color: var(--blue); opacity: 1; }

.footer-bottom {
  border-top: 1px solid var(--footer-bd);
  padding-top: 20px;
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 10px;
  font-size: 12px;
  color: #64748b;
}
.footer-bottom-links { display: flex; gap: 18px; }

/* =========================================================================
   CHATBOT — adapted to light theme
   ========================================================================= */
.chat-fab {
  position: fixed; bottom: 24px; right: 24px;
  width: 58px; height: 58px;
  border-radius: 50%;
  background: var(--blue);
  border: none; cursor: pointer;
  box-shadow: var(--shadow-blue);
  z-index: 100;
  display: flex; align-items: center; justify-content: center;
  transition: transform .25s, box-shadow .25s, bottom .3s ease;
}
/* lifted when footer-bottom strip is visible — keeps the FAB from covering 隐私政策/服务条款 */
.chat-fab.lifted   { bottom: 96px; }
.chat-panel.lifted { bottom: 168px; }
.chat-fab:hover { transform: scale(1.06); box-shadow: 0 14px 36px rgba(21, 93, 252, 0.32); }
.chat-fab-icon { font-size: 24px; }
.chat-fab-pulse {
  position: absolute; inset: -4px;
  border-radius: 50%;
  border: 2px solid var(--blue);
  animation: pulse-ring 2s ease-out infinite;
  pointer-events: none;
  opacity: 0.5;
}
@keyframes pulse-ring {
  0%   { transform: scale(0.95); opacity: 0.7; }
  100% { transform: scale(1.5);  opacity: 0;   }
}

.chat-panel {
  position: fixed;
  bottom: 96px; right: 24px;
  width: min(380px, calc(100vw - 48px));
  height: min(560px, calc(100vh - 140px));
  background: var(--card);
  border: 1px solid var(--bd);
  border-radius: 16px;
  box-shadow: var(--shadow-lg);
  z-index: 99;
  display: none;
  flex-direction: column;
  overflow: hidden;
  opacity: 0;
  transform: translateY(20px) scale(0.96);
  transition: opacity .25s, transform .25s;
}
.chat-panel.open { display: flex; opacity: 1; transform: translateY(0) scale(1); }

.chat-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 16px;
  border-bottom: 1px solid var(--bd);
  background: var(--blue-pale);
}
.chat-head-l { display: flex; gap: 12px; align-items: center; }
.chat-avatar {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: #fff;
  border: 1px solid var(--blue-border);
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
  flex-shrink: 0;
}
.chat-avatar img {
  width: 26px; height: 26px;
  object-fit: contain;
}
.chat-title { font-weight: 600; font-size: 14px; color: var(--text); }
.chat-sub { font-size: 11px; color: var(--text-mute); display: flex; align-items: center; gap: 6px; margin-top: 2px; font-family: var(--font-mono); }
.online-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--green); box-shadow: 0 0 4px var(--green);
}
.chat-close {
  width: 28px; height: 28px;
  background: transparent; border: none;
  color: var(--text-mute); font-size: 22px; cursor: pointer;
  border-radius: 6px; line-height: 1;
}
.chat-close:hover { background: rgba(0,0,0,0.05); color: var(--text); }

.chat-body {
  flex: 1; overflow-y: auto;
  padding: 16px;
  display: flex; flex-direction: column; gap: 10px;
  background: var(--bg);
}
.chat-body::-webkit-scrollbar { width: 6px; }
.chat-body::-webkit-scrollbar-thumb { background: var(--bd-strong); border-radius: 3px; }

.msg {
  max-width: 85%;
  padding: 10px 14px;
  border-radius: 14px;
  font-size: 14px;
  line-height: 1.5;
  word-wrap: break-word;
  white-space: pre-wrap;
}
.msg.bot {
  align-self: flex-start;
  background: var(--card);
  border: 1px solid var(--bd);
  color: var(--text);
  border-bottom-left-radius: 4px;
}
.msg.user {
  align-self: flex-end;
  background: var(--blue);
  color: #fff;
  border-bottom-right-radius: 4px;
}
.msg.typing {
  display: inline-flex; gap: 4px; padding: 14px 18px;
}
.msg.typing span {
  width: 6px; height: 6px; border-radius: 50%; background: var(--text-mute);
  animation: typing 1.2s infinite ease-in-out;
}
.msg.typing span:nth-child(2) { animation-delay: 0.2s; }
.msg.typing span:nth-child(3) { animation-delay: 0.4s; }
@keyframes typing {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
  30%           { transform: translateY(-4px); opacity: 1; }
}

.chat-input {
  display: flex; gap: 8px;
  padding: 12px;
  border-top: 1px solid var(--bd);
  background: var(--card);
}
.chat-input input {
  flex: 1;
  padding: 10px 14px;
  border-radius: 999px;
  border: 1px solid var(--bd);
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body); font-size: 14px;
  outline: none;
  transition: border-color .2s;
}
.chat-input input:focus { border-color: var(--blue); }
.chat-input input::placeholder { color: var(--text-faint); }

.chat-send {
  padding: 0 18px;
  border-radius: 999px;
  border: none;
  background: var(--blue);
  color: #fff;
  font-weight: 600; font-size: 13px;
  cursor: pointer;
  transition: all .2s;
}
.chat-send:hover { background: var(--blue-deep); }
.chat-send:disabled { opacity: 0.5; cursor: not-allowed; }

.chat-quick {
  display: flex; gap: 6px; flex-wrap: wrap; margin-top: 4px;
}
.chat-quick button {
  background: var(--blue-pale);
  border: 1px solid var(--blue-border);
  color: var(--blue-deep);
  font-size: 12px;
  padding: 5px 12px;
  border-radius: 999px;
  cursor: pointer;
}
.chat-quick button:hover { background: #dbeafe; }

/* =========================================================================
   YOLOX PCB DETECTION ANIMATION
   ========================================================================= */
.yolox-detect {
  margin: 28px 0 56px;
  border: 1px solid var(--border);
  border-radius: 18px;
  background:
    linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
  padding: 22px 24px 18px;
  box-shadow: 0 6px 22px -16px rgba(15, 23, 42, .18);
}
.yolox-head {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px; flex-wrap: wrap;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--border);
}
.yolox-tag {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 11px; font-weight: 600; letter-spacing: .12em;
  color: var(--blue-deep);
  padding: 5px 10px;
  background: var(--blue-pale);
  border: 1px solid var(--blue-border);
  border-radius: 6px;
}
.yolox-tag::before {
  content: ""; width: 7px; height: 7px; border-radius: 50%;
  background: var(--blue);
  box-shadow: 0 0 0 3px rgba(21, 93, 252, .15);
  animation: yolox-pulse 1.6s ease-in-out infinite;
}
.yolox-meta { font-size: 11px; color: var(--text-mute); letter-spacing: .04em; }

.yolox-stage {
  display: grid;
  grid-template-columns: 1fr 1.1fr 1fr;
  gap: 14px;
  align-items: stretch;
}

/* Panels (input + output) */
.yolox-panel {
  display: flex; flex-direction: column;
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  background: #fff;
}
.yolox-panel-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 9px 12px;
  background: #f1f5f9;
  border-bottom: 1px solid var(--border);
}
.yolox-panel-label {
  font-size: 11px; font-weight: 700; letter-spacing: .14em;
  color: var(--text);
  font-family: 'JetBrains Mono', ui-monospace, monospace;
}
.yolox-output .yolox-panel-label { color: var(--blue-deep); }
.yolox-panel-meta { font-size: 10.5px; color: var(--text-mute); }
.yolox-panel-img {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: #0f172a;
}
.yolox-panel-img img {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
}

/* INPUT — scan line + grid overlay */
.yolox-input .yolox-panel-img::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(21,93,252,0) 0%, rgba(21,93,252,.08) 50%, rgba(21,93,252,0) 100%);
  pointer-events: none;
}
.yolox-scanline {
  position: absolute; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg,
    transparent 0%,
    rgba(21, 93, 252, .9) 30%,
    rgba(56, 189, 248, 1) 50%,
    rgba(21, 93, 252, .9) 70%,
    transparent 100%);
  box-shadow: 0 0 16px rgba(21, 93, 252, .8);
  top: 0;
  animation: yolox-scan 4s ease-in-out infinite;
  z-index: 2;
}
.yolox-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(56, 189, 248, .14) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56, 189, 248, .14) 1px, transparent 1px);
  background-size: 12.5% 20%;
  opacity: 0;
  pointer-events: none;
  animation: yolox-grid-flash 4s ease-in-out infinite;
  z-index: 1;
}

@keyframes yolox-scan {
  0%, 100% { top: 0; opacity: 0; }
  4%       { opacity: 1; }
  35%      { top: calc(100% - 3px); opacity: 1; }
  45%      { top: calc(100% - 3px); opacity: 0; }
}
@keyframes yolox-grid-flash {
  0%, 100% { opacity: 0; }
  10%, 35% { opacity: 1; }
  50%      { opacity: 0; }
}

/* PIPELINE column */
.yolox-pipeline {
  display: grid;
  grid-template-columns: 22px 1fr 22px;
  gap: 8px;
  align-items: center;
  padding: 14px 6px;
}
.yolox-arrow {
  color: var(--blue);
  opacity: .55;
  display: flex; align-items: center; justify-content: center;
}
.yolox-arrow-l svg, .yolox-arrow-r svg { width: 22px; height: 22px; }
.yolox-arrow-l { animation: yolox-arrow-pulse 2s ease-in-out infinite; }
.yolox-arrow-r { animation: yolox-arrow-pulse 2s ease-in-out infinite .6s; }

@keyframes yolox-arrow-pulse {
  0%, 100% { transform: translateX(0); opacity: .35; }
  50%      { transform: translateX(3px); opacity: 1; }
}

.yolox-stages {
  list-style: none; margin: 0; padding: 0;
  display: flex; flex-direction: column; gap: 9px;
}
.yolox-st {
  position: relative;
  display: grid;
  grid-template-columns: 14px 1fr auto;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #fff;
  font-size: 12.5px;
  overflow: hidden;
  animation: yolox-st-active 4s ease-in-out infinite;
  animation-delay: var(--d);
}
.yolox-st-dot {
  width: 9px; height: 9px; border-radius: 50%;
  background: #cbd5e1;
  transition: background .25s ease;
  animation: yolox-dot-active 4s ease-in-out infinite;
  animation-delay: var(--d);
}
.yolox-st-name { color: var(--text); font-weight: 600; }
.yolox-st-sub { color: var(--text-mute); font-size: 10.5px; letter-spacing: .03em; }
.yolox-st-bar {
  position: absolute; left: 0; bottom: 0; height: 2px;
  width: 0%;
  background: linear-gradient(90deg, var(--blue) 0%, #38bdf8 100%);
  animation: yolox-bar-fill 4s ease-in-out infinite;
  animation-delay: var(--d);
}

@keyframes yolox-st-active {
  0%, 5%, 70%, 100%   { border-color: var(--border); background: #fff; box-shadow: none; }
  15%, 55%            { border-color: var(--blue-border); background: var(--blue-pale); box-shadow: 0 0 0 1px rgba(21,93,252,.08) inset; }
}
@keyframes yolox-dot-active {
  0%, 5%, 70%, 100%   { background: #cbd5e1; box-shadow: none; }
  15%, 55%            { background: var(--blue); box-shadow: 0 0 0 4px rgba(21,93,252,.18); }
}
@keyframes yolox-bar-fill {
  0%, 5%   { width: 0%; }
  35%      { width: 100%; }
  60%      { width: 100%; opacity: .9; }
  70%, 100% { width: 100%; opacity: 0; }
}

/* OUTPUT — same image as input, with dynamically-drawn yellow missing_hole boxes */
.yolox-out-img {
  filter: brightness(.65) saturate(.7);
  animation: yolox-out-reveal 4s ease-in-out infinite;
}
.yolox-out-mask {
  position: absolute; inset: 0;
  background: linear-gradient(90deg,
    transparent 0%, transparent 35%,
    rgba(56, 189, 248, .55) 48%, rgba(21, 93, 252, .7) 50%, rgba(56, 189, 248, .55) 52%,
    transparent 65%, transparent 100%);
  background-size: 220% 100%;
  background-position: -120% 0;
  mix-blend-mode: screen;
  pointer-events: none;
  animation: yolox-out-sweep 4s ease-in-out infinite;
  z-index: 1;
}
@keyframes yolox-out-reveal {
  0%, 45%       { filter: brightness(.65) saturate(.7); }
  55%           { filter: brightness(.85) saturate(.9); }
  65%, 100%     { filter: brightness(1)   saturate(1); }
}
@keyframes yolox-out-sweep {
  0%, 42%       { background-position: -120% 0; opacity: 0; }
  46%           { opacity: 1; }
  62%           { background-position: 120% 0; opacity: 1; }
  66%, 100%     { background-position: 120% 0; opacity: 0; }
}

/* Yellow missing_hole bounding boxes — appear sequentially after the sweep */
.yolox-box {
  position: absolute;
  border: 2px solid #facc15;
  border-radius: 1px;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, .35), 0 0 12px rgba(250, 204, 21, .65);
  opacity: 0;
  animation: yolox-box-show 4s ease-in-out infinite;
  z-index: 3;
}
.yolox-b1 { animation-delay: .15s; }
.yolox-b2 { animation-delay: .35s; }
.yolox-b3 { animation-delay: .55s; }
.yolox-box-tag {
  position: absolute;
  left: -2px;
  top: -16px;
  background: #facc15;
  color: #1f2937;
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 10px; font-weight: 700;
  padding: 1px 5px;
  border-radius: 2px 2px 2px 0;
  white-space: nowrap;
  letter-spacing: .01em;
  line-height: 1.3;
}
.yolox-box.right-anchor .yolox-box-tag {
  left: auto;
  right: -2px;
  border-radius: 2px 2px 0 2px;
}
@keyframes yolox-box-show {
  0%, 64%      { opacity: 0; transform: scale(.85); }
  68%          { opacity: 1; transform: scale(1.18); }
  72%, 96%     { opacity: 1; transform: scale(1); }
  100%         { opacity: 0; transform: scale(1); }
}

/* 6-class chip strip */
.yolox-classes {
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dashed var(--border);
  font-size: 11px;
}
.yolox-classes-lbl {
  color: var(--text-mute); font-weight: 600; letter-spacing: .12em;
  margin-right: 4px;
}
.yolox-cls {
  display: inline-block;
  padding: 3px 9px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--text-mute);
  background: #fff;
  letter-spacing: .02em;
}
.yolox-cls.active {
  border-color: #facc15;
  background: #fefce8;
  color: #854d0e;
  font-weight: 600;
}

@keyframes yolox-pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 3px rgba(21, 93, 252, .15); }
  50%      { opacity: .55; box-shadow: 0 0 0 5px rgba(21, 93, 252, .08); }
}

@media (max-width: 960px) {
  .yolox-stage {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .yolox-pipeline {
    grid-template-columns: 22px 1fr 22px;
    padding: 8px 4px;
  }
  .yolox-stages { flex-direction: row; flex-wrap: wrap; }
  .yolox-st { flex: 1 1 calc(50% - 5px); min-width: 130px; }
  .yolox-arrow-l svg, .yolox-arrow-r svg { transform: rotate(90deg); }
}

/* =========================================================================
   RESPONSIVE TWEAKS
   ========================================================================= */
@media (max-width: 720px) {
  .nav-links { display: none; }
  .nav-inner { gap: 12px; }
}