@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@300;400;500;600;700;800&family=DM+Sans:wght@300;400;500&family=Noto+Sans+TC:wght@300;400;500;700&family=JetBrains+Mono:wght@400;600&display=swap');

/* ── Light Theme Variables ── */
:root {
  --bg:          #FFFFFF;
  --surface:     #F4F7FF;
  --card:        #FFFFFF;

  --blue:        #4472C4;
  --blue-mid:    #3562B8;
  --blue-light:  #6B9AE8;
  --blue-pale:   #EBF1FB;
  --blue-dim:    rgba(68, 114, 196, 0.10);
  --blue-glow:   rgba(68, 114, 196, 0.22);
  --blue-border: rgba(68, 114, 196, 0.20);

  --text:        #1A2540;
  --text-mid:    #3A4A6A;
  --muted:       #7A8FAD;
  --divider:     rgba(68, 114, 196, 0.14);

  --red:         #E03535;
  --green:       #2DBD7A;

  --shadow-sm:   0 1px 4px rgba(68,114,196,0.08), 0 4px 16px rgba(68,114,196,0.06);
  --shadow-md:   0 4px 24px rgba(68,114,196,0.12);

  --font-display: 'Montserrat', 'Noto Sans TC', sans-serif;
  --font-body:    'DM Sans', 'Noto Sans TC', sans-serif;
  --font-mono:    'JetBrains Mono', monospace;
  --radius: 6px;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.7;
  overflow-x: hidden;
}

/* ── Nav ── */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 4rem;
  height: 68px;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--divider);
  box-shadow: 0 1px 12px rgba(68,114,196,0.07);
}

.nav-logo { display: flex; align-items: center; text-decoration: none; }
.nav-logo-img { height: 56px; width: auto; object-fit: contain; }

.nav-links { display: flex; gap: 2.2rem; list-style: none; align-items: center; }
.nav-links a {
  color: var(--text-mid);
  text-decoration: none;
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  font-weight: 500;
  transition: color var(--transition);
}
.nav-links a:hover { color: var(--blue); }

.nav-cta {
  padding: 0.5rem 1.4rem !important;
  background: var(--blue) !important;
  color: #fff !important;
  border-radius: var(--radius);
  transition: background var(--transition), box-shadow var(--transition) !important;
}
.nav-cta:hover {
  background: var(--blue-mid) !important;
  box-shadow: 0 4px 16px var(--blue-glow) !important;
}

/* ── Section ── */
section { position: relative; padding: 7rem 4rem; overflow: hidden; }

.section-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--blue);
  letter-spacing: 0.3em;
  text-transform: uppercase;
  margin-bottom: 0.9rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.section-label::before {
  content: '';
  width: 24px; height: 2px;
  background: var(--blue);
  flex-shrink: 0;
}

h2.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 3.6vw, 2.9rem);
  font-weight: 700;
  color: var(--text);
  line-height: 1.18;
  margin-bottom: 0.4rem;
  letter-spacing: -0.02em;
}
h2.section-title .cn {
  display: block;
  font-size: 0.48em;
  color: var(--muted);
  letter-spacing: 0.18em;
  font-weight: 400;
  margin-top: 0.5rem;
  font-family: 'Noto Sans TC', sans-serif;
}

.section-divider {
  width: 40px; height: 3px;
  background: var(--blue);
  margin: 1.8rem 0 3rem;
  border-radius: 2px;
}

/* ── Reveal ── */
.reveal {
  opacity: 0; transform: translateY(24px);
  transition: opacity 0.7s cubic-bezier(0.16,1,0.3,1), transform 0.7s cubic-bezier(0.16,1,0.3,1);
}
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ── Hero ── */
#hero {
  height: 100vh;
  min-height: 680px;
  display: flex;
  align-items: center;
  padding: 0 4rem;
  background: linear-gradient(135deg, #F4F7FF 0%, #FFFFFF 55%, #EBF1FB 100%);
}

#hero-canvas {
  position: absolute;
  inset: 0; width: 100%; height: 100%;
  opacity: 0.6;
}

.hero-content { position: relative; z-index: 2; max-width: 740px; }

.hero-brand {
  display: flex; align-items: center; gap: 1.2rem; margin-bottom: 2.5rem;
}
.hero-brand-logo { height: 72px; width: auto; object-fit: contain; }
.hero-brand-sep { width: 1px; height: 36px; background: var(--divider); }
.hero-brand-sub {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--muted);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  line-height: 1.6;
}

h1.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 5.5vw, 4.8rem);
  font-weight: 800;
  line-height: 1.06;
  color: var(--text);
  letter-spacing: -0.03em;
  margin-bottom: 1.4rem;
}
h1.hero-title .accent { color: var(--blue); }
h1.hero-title .cn-sub {
  display: block;
  font-size: 0.38em;
  font-weight: 400;
  color: var(--muted);
  letter-spacing: 0.2em;
  margin-top: 0.8rem;
  font-family: 'Noto Sans TC', sans-serif;
}

.hero-tagline { font-size: clamp(1rem,2vw,1.25rem); color: var(--text-mid); font-weight: 400; margin-bottom: 0.4rem; }
.hero-tagline strong { color: var(--blue); font-weight: 700; }
.hero-tagline-en {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--muted);
  letter-spacing: 0.26em;
  text-transform: uppercase;
  margin-bottom: 3rem;
}

.hero-cta {
  display: inline-flex; align-items: center; gap: 0.75rem;
  padding: 0.95rem 2.4rem;
  background: var(--blue); color: #fff;
  font-family: var(--font-display); font-size: 0.85rem; font-weight: 700;
  letter-spacing: 0.1em; text-transform: uppercase; text-decoration: none;
  border-radius: var(--radius);
  transition: background var(--transition), box-shadow var(--transition), transform var(--transition);
  box-shadow: 0 4px 20px var(--blue-glow);
}
.hero-cta:hover {
  background: var(--blue-mid);
  box-shadow: 0 8px 32px var(--blue-glow);
  transform: translateY(-2px);
}

.scroll-indicator {
  position: absolute; bottom: 2.5rem; left: 50%;
  transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 0.5rem; z-index: 2;
}
.scroll-indicator span { font-family: var(--font-mono); font-size: 0.6rem; color: var(--muted); letter-spacing: 0.25em; }
.scroll-line {
  width: 1px; height: 44px;
  background: linear-gradient(to bottom, var(--blue), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}
@keyframes scrollPulse { 0%,100%{opacity:0.4} 50%{opacity:1} }

/* ── About ── */
#about {
  padding: 4.5rem 4rem;
  background: var(--surface);
  border-top: 1px solid var(--divider);
  border-bottom: 1px solid var(--divider);
}
.about-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 4rem; align-items: center; }
.about-main p { font-size: 0.97rem; color: var(--text-mid); line-height: 1.9; }
.about-main p + p { margin-top: 1rem; }
.about-photo img {
  width: 100%; border-radius: var(--radius);
  box-shadow: var(--shadow-md); border: 1px solid var(--blue-border);
}

/* ── Products ── */
#products { background: var(--bg); }
.products-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; margin-top: 0.5rem; }
.product-card {
  background: var(--card);
  border: 1px solid var(--blue-border);
  border-radius: var(--radius);
  padding: 3rem;
  position: relative; overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
}
.product-card::after {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: var(--blue); transform: scaleX(0); transform-origin: left;
  transition: transform 0.4s cubic-bezier(0.4,0,0.2,1);
}
.product-card:hover::after { transform: scaleX(1); }
.product-card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
.product-card::before {
  content: attr(data-num);
  position: absolute; right: 2rem; bottom: 1rem;
  font-family: var(--font-display); font-size: 7rem; font-weight: 800;
  color: rgba(68,114,196,0.04); line-height: 1; pointer-events: none;
}
.product-card.variant::after { background: var(--blue-light); }
.product-icon { width: 52px; height: 52px; margin-bottom: 1.8rem; }
.product-num { font-family: var(--font-mono); font-size: 0.63rem; color: var(--blue); letter-spacing: 0.3em; margin-bottom: 0.9rem; }
.product-name { font-family: var(--font-display); font-size: 1.65rem; font-weight: 700; color: var(--text); margin-bottom: 0.15rem; letter-spacing: -0.01em; }
.product-name-en { font-size: 0.7rem; color: var(--muted); letter-spacing: 0.18em; text-transform: uppercase; margin-bottom: 1.5rem; font-family: var(--font-mono); }
.product-desc { font-size: 0.9rem; color: var(--text-mid); line-height: 1.85; margin-bottom: 1.8rem; }
.product-features { list-style: none; display: flex; flex-direction: column; gap: 0.55rem; }
.product-features li { font-size: 0.82rem; color: var(--muted); display: flex; align-items: center; gap: 0.7rem; }
.product-features li::before { content:''; display:block; width:5px; height:5px; background:var(--blue); border-radius:50%; flex-shrink:0; }
.product-card.variant .product-features li::before { background: var(--blue-light); }

/* ── How It Works ── */
#how-it-works { background: var(--surface); }
.hiw-layout { display: grid; grid-template-columns: 1fr 460px; gap: 6rem; align-items: center; }
.hiw-steps { display: flex; flex-direction: column; gap: 2.5rem; }
.hiw-step { display: grid; grid-template-columns: 52px 1fr; gap: 1.3rem; align-items: start; }
.step-num { font-family: var(--font-mono); font-size: 0.62rem; color: var(--blue); letter-spacing: 0.2em; padding-top: 0.25rem; }
.step-title { font-family: var(--font-display); font-size: 1.05rem; font-weight: 600; color: var(--text); margin-bottom: 0.4rem; }
.step-desc { font-size: 0.87rem; color: var(--text-mid); line-height: 1.8; }
#cross-section-svg { width: 100%; height: auto; filter: drop-shadow(0 4px 20px rgba(68,114,196,0.10)); }

/* ── Waveform ── */
#waveform { background: var(--bg); }
.waveform-canvases { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; margin-top: 0.5rem; }
.wave-panel {
  background: var(--surface);
  border: 1px solid var(--blue-border);
  border-radius: var(--radius);
  padding: 1.8rem;
  position: relative;
  box-shadow: var(--shadow-sm);
}
.wave-panel-label { font-family: var(--font-mono); font-size: 0.67rem; letter-spacing: 0.2em; text-transform: uppercase; margin-bottom: 1rem; }
.wave-panel-label.danger { color: var(--red); }
.wave-panel-label.safe   { color: var(--blue); }
.wave-panel canvas { display: block; width: 100%; height: 120px; }
.reduction-badge {
  position: absolute; top: 1.4rem; right: 1.4rem;
  font-family: var(--font-mono); font-size: 0.68rem;
  padding: 0.28rem 0.8rem; border-radius: 4px; letter-spacing: 0.08em;
}
.reduction-badge.safe { background: var(--blue-pale); color: var(--blue); border: 1px solid var(--blue-border); }
.reduction-badge.danger-badge { background: #FFF0F0; color: var(--red); border: 1px solid rgba(224,53,53,0.2); }

/* ── Simulator ── */
#simulator { background: var(--surface); }
.sim-layout { display: grid; grid-template-columns: 270px 1fr; gap: 4rem; }
.sim-controls { display: flex; flex-direction: column; gap: 2rem; }
.sim-control-group label { display: block; font-family: var(--font-mono); font-size: 0.65rem; color: var(--muted); letter-spacing: 0.2em; text-transform: uppercase; margin-bottom: 0.75rem; }
.magnitude-display { font-family: var(--font-display); font-size: 3.4rem; font-weight: 800; color: var(--blue); line-height: 1; margin-bottom: 0.25rem; letter-spacing: -0.02em; }
.magnitude-display .unit { font-size: 1rem; color: var(--muted); font-weight: 400; }
.magnitude-scale { font-size: 0.72rem; color: var(--muted); margin-bottom: 1rem; }

input[type="range"] {
  width: 100%; -webkit-appearance: none;
  height: 4px; background: var(--blue-pale);
  outline: none; cursor: pointer; border-radius: 2px; margin-bottom: 0.4rem;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; width: 20px; height: 20px;
  border-radius: 50%; background: var(--blue);
  border: 3px solid #fff;
  box-shadow: 0 2px 8px var(--blue-glow);
  cursor: pointer; transition: box-shadow var(--transition);
}
input[type="range"]::-webkit-slider-thumb:hover { box-shadow: 0 2px 14px var(--blue-glow); }

.sim-machines { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
.sim-machine {
  background: var(--card);
  border: 1px solid var(--blue-border);
  border-radius: var(--radius);
  padding: 2rem; text-align: center;
  box-shadow: var(--shadow-sm);
}
.sim-machine-label { font-family: var(--font-mono); font-size: 0.63rem; letter-spacing: 0.2em; text-transform: uppercase; margin-bottom: 1.4rem; }
.sim-machine-label.protected   { color: var(--blue); }
.sim-machine-label.unprotected { color: var(--red); }
#sim-canvas-protected, #sim-canvas-unprotected { display: block; width: 100%; height: 180px; margin-bottom: 1.4rem; }
.particle-counter { border-top: 1px solid var(--divider); padding-top: 1.1rem; }
.particle-count { font-family: var(--font-display); font-size: 2.8rem; font-weight: 800; line-height: 1; letter-spacing: -0.02em; transition: color 0.4s; }
.particle-count.safe   { color: var(--blue); }
.particle-count.danger { color: var(--red); }
.particle-label { font-size: 0.68rem; color: var(--muted); letter-spacing: 0.18em; text-transform: uppercase; margin-top: 0.3rem; }
.sim-description { font-size: 0.8rem; color: var(--text-mid); line-height: 1.65; margin-top: 0.55rem; }

/* ── Contact ── */
#contact { background: var(--surface); border-top: 1px solid var(--divider); }
.contact-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 6rem; }
.contact-intro { font-size: 0.93rem; color: var(--text-mid); line-height: 1.88; margin-bottom: 2.5rem; }
.contact-items { display: flex; flex-direction: column; gap: 1.3rem; }
.contact-item { display: flex; gap: 1.1rem; align-items: flex-start; }
.contact-item-icon { width: 36px; height: 36px; border: 1px solid var(--blue-border); border-radius: var(--radius); display: flex; align-items: center; justify-content: center; flex-shrink: 0; color: var(--blue); background: var(--blue-pale); }
.contact-item-label { font-family: var(--font-mono); font-size: 0.6rem; color: var(--muted); letter-spacing: 0.2em; text-transform: uppercase; margin-bottom: 0.2rem; }
.contact-item-value { font-size: 0.88rem; color: var(--text); }
.contact-form { display: flex; flex-direction: column; gap: 1.1rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1.1rem; }
.form-group { display: flex; flex-direction: column; gap: 0.4rem; }
.form-group label { font-family: var(--font-mono); font-size: 0.6rem; color: var(--muted); letter-spacing: 0.2em; text-transform: uppercase; }
.form-group input, .form-group textarea, .form-group select {
  background: var(--bg); border: 1px solid var(--blue-border);
  color: var(--text); font-family: var(--font-body); font-size: 0.88rem;
  padding: 0.75rem 1rem; outline: none; border-radius: var(--radius);
  transition: border-color var(--transition), box-shadow var(--transition);
  resize: none; appearance: none;
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px var(--blue-dim);
}
.form-group textarea { height: 108px; }
.form-submit {
  display: inline-flex; align-items: center; gap: 0.75rem;
  padding: 0.9rem 2.2rem;
  background: var(--blue); color: #fff; border: none;
  font-family: var(--font-display); font-size: 0.82rem; font-weight: 700;
  letter-spacing: 0.12em; text-transform: uppercase; cursor: pointer;
  border-radius: var(--radius); align-self: flex-start;
  box-shadow: 0 4px 16px var(--blue-glow);
  transition: background var(--transition), box-shadow var(--transition), transform var(--transition);
}
.form-submit:hover { background: var(--blue-mid); box-shadow: 0 6px 24px var(--blue-glow); transform: translateY(-1px); }

/* ── Footer ── */
footer {
  background: var(--text);
  padding: 2rem 4rem;
  display: flex; justify-content: space-between; align-items: center;
}
footer p { font-family: var(--font-mono); font-size: 0.63rem; color: rgba(255,255,255,0.5); letter-spacing: 0.14em; }
footer strong { color: #fff; }

/* ── Dot grid ── */
.dot-bg {
  position: absolute; inset: 0; pointer-events: none;
  background-image: radial-gradient(rgba(68,114,196,0.15) 1px, transparent 1px);
  background-size: 28px 28px;
}

/* ── SVG cross-section (dark lines on light) ── */
#cross-section-svg text { fill: var(--text-mid); }

/* ── Services ── */
#services { background: var(--bg); }
.services-intro { font-size: 0.96rem; color: var(--text-mid); max-width: 700px; line-height: 1.85; margin-bottom: 3rem; }
.services-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.2rem; }
.service-card {
  background: var(--card); border: 1px solid var(--blue-border);
  border-radius: var(--radius); padding: 2.2rem 1.8rem;
  position: relative; overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
}
.service-card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
.service-accent-bar {
  position: absolute; top: 0; left: 0; right: 0; height: 3px;
}
.service-icon-wrap {
  width: 52px; height: 52px; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 1.4rem;
}
.service-name { font-family: var(--font-display); font-size: 1.22rem; font-weight: 700; color: var(--text); margin-bottom: 1rem; }
.service-desc { font-size: 0.87rem; color: var(--text-mid); line-height: 1.82; margin-bottom: 1.4rem; }
.service-features { list-style: none; display: flex; flex-direction: column; gap: 0.45rem; }
.service-features li { font-size: 0.8rem; color: var(--muted); display: flex; align-items: center; gap: 0.65rem; }
.service-features li::before { content:''; display:block; width:5px; height:5px; background: currentColor; border-radius:50%; flex-shrink:0; opacity: 0.6; }

/* ── Challenges ── */
#challenges { background: var(--surface); }
.challenges-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: auto auto;
  gap: 1.2rem;
}
.challenge-card {
  background: var(--card); border: 1px solid var(--blue-border);
  border-radius: var(--radius); padding: 1.8rem;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
}
.challenge-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.challenge-wide { grid-column: span 2; }
.challenge-icon {
  width: 48px; height: 48px; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 1rem;
}
.challenge-title { font-family: var(--font-display); font-size: 1.08rem; font-weight: 700; color: var(--text); margin-bottom: 0.5rem; }
.challenge-desc { font-size: 0.85rem; color: var(--text-mid); line-height: 1.8; }

/* ── Process ── */
#process { background: var(--bg); }
.process-steps {
  display: flex; gap: 0; align-items: stretch;
  background: var(--surface); border: 1px solid var(--divider);
  border-radius: var(--radius); overflow: hidden; margin-bottom: 3rem;
}
.process-step {
  flex: 1; padding: 2rem 1.5rem; position: relative;
  display: flex; flex-direction: column; align-items: center; text-align: center;
  border-right: 1px solid var(--divider);
}
.process-step.last { border-right: none; }
.process-step-num {
  width: 28px; height: 28px; border-radius: 50%;
  color: #fff; font-family: var(--font-mono); font-size: 0.7rem; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 0.9rem;
}
.process-step-icon { margin-bottom: 0.75rem; }
.process-step-name { font-family: var(--font-display); font-size: 1rem; font-weight: 700; color: var(--text); margin-bottom: 0.5rem; }
.process-step-desc { font-size: 0.75rem; color: var(--muted); line-height: 1.65; }
.process-arrow {
  position: absolute; right: -0.85rem; top: 50%;
  transform: translateY(-50%);
  font-size: 1.1rem; color: var(--muted); z-index: 2;
  background: var(--surface); padding: 0 0.2rem;
}

.value-props { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.2rem; margin-bottom: 2.5rem; }
.value-prop {
  background: var(--card); border: 1px solid var(--blue-border);
  border-radius: var(--radius); padding: 2rem; box-shadow: var(--shadow-sm);
}
.value-prop-icon {
  width: 44px; height: 44px; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 1rem;
}
.value-prop-title { font-family: var(--font-display); font-size: 1rem; font-weight: 700; color: var(--text); margin-bottom: 0.5rem; }
.value-prop-desc { font-size: 0.86rem; color: var(--text-mid); line-height: 1.8; }

.process-banner {
  background: var(--blue-pale); border: 1px solid var(--blue-border);
  border-radius: var(--radius); padding: 1.4rem 2rem;
  font-family: var(--font-display); font-size: 1.02rem; color: var(--text-mid); text-align: center;
  letter-spacing: 0.02em;
}
.process-banner strong { color: var(--blue); font-weight: 700; }

/* ── Team ── */
#team { background: var(--surface); }
.team-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; margin-bottom: 3rem; }
.team-card {
  background: var(--card); border: 1px solid var(--blue-border);
  border-radius: var(--radius); padding: 2rem;
  display: flex; gap: 1.4rem; align-items: flex-start;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
}
.team-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.team-avatar {
  width: 58px; height: 58px; border-radius: 50%; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display); font-size: 1.5rem; font-weight: 800; color: #fff;
  box-shadow: 0 4px 16px rgba(0,0,0,0.12);
}
.team-name { font-family: var(--font-display); font-size: 1.12rem; font-weight: 700; color: var(--text); margin-bottom: 0.15rem; }
.team-title-en { font-family: var(--font-mono); font-size: 0.6rem; color: var(--muted); letter-spacing: 0.14em; text-transform: uppercase; margin-bottom: 0.9rem; }
.team-bio { list-style: none; display: flex; flex-direction: column; gap: 0.4rem; }
.team-bio li { font-size: 0.82rem; color: var(--text-mid); line-height: 1.6; display: flex; gap: 0.55rem; }
.team-bio li::before { content: '·'; color: var(--blue); flex-shrink: 0; font-weight: 700; }

.team-stats { display: flex; gap: 3rem; align-items: center; margin-bottom: 2.5rem; padding: 2rem 2.5rem; background: var(--blue-pale); border: 1px solid var(--blue-border); border-radius: var(--radius); }
.team-stat { text-align: center; }
.team-stat-num { font-family: var(--font-display); font-size: 2.6rem; font-weight: 800; color: var(--blue); line-height: 1; }
.team-stat-num span { font-size: 1.2rem; }
.team-stat-label { font-family: var(--font-mono); font-size: 0.62rem; color: var(--muted); letter-spacing: 0.18em; text-transform: uppercase; margin-top: 0.3rem; }

.university-row { border-top: 1px solid var(--divider); padding-top: 2rem; }
.university-label { font-family: var(--font-mono); font-size: 0.62rem; color: var(--muted); letter-spacing: 0.22em; text-transform: uppercase; margin-bottom: 1.1rem; }
.university-list { display: flex; gap: 0.7rem; flex-wrap: wrap; }
.university-tag {
  font-family: var(--font-display); font-size: 0.8rem; font-weight: 600;
  color: var(--text-mid); background: var(--card); border: 1px solid var(--blue-border);
  border-radius: var(--radius); padding: 0.45rem 1rem;
}

/* ── Team photo (real photo instead of avatar) ── */
.team-photo {
  width: 80px; height: 100px;
  object-fit: cover; object-position: top center;
  border-radius: 6px; flex-shrink: 0;
  border: 2px solid rgba(124,58,237,0.25);
  box-shadow: 0 4px 16px rgba(0,0,0,0.12);
}

/* ── University logos ── */
.university-logo-item {
  display: flex; flex-direction: column; align-items: center; gap: 0.5rem;
  padding: 0.8rem 1rem;
  background: var(--card); border: 1px solid var(--blue-border);
  border-radius: var(--radius);
  transition: box-shadow var(--transition), transform var(--transition);
}
.university-logo-item:hover { box-shadow: var(--shadow-sm); transform: translateY(-2px); }
.university-logo-item img { width: 48px; height: 48px; object-fit: contain; }
.university-logo-item span { font-size: 0.72rem; color: var(--text-mid); font-weight: 600; font-family: var(--font-display); white-space: nowrap; }
.university-list { display: flex; gap: 0.8rem; flex-wrap: wrap; }

/* ── How It Works concept image ── */
.hiw-concept { margin-bottom: 3rem; display: inline-block; }
.hiw-concept-img {
  width: 100%; max-width: 680px; height: auto;
  border-radius: var(--radius); border: 1px solid var(--divider);
  box-shadow: var(--shadow-sm); display: block;
}
.hiw-concept-note {
  font-family: var(--font-mono); font-size: 0.6rem; color: var(--muted);
  letter-spacing: 0.18em; margin-top: 0.5rem; text-align: center;
}

/* ── Gallery ── */
#gallery { background: var(--surface); }
.gallery-photos {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 1.2rem; margin-bottom: 3.5rem;
}
.gallery-photo-item {
  background: var(--card); border: 1px solid var(--blue-border);
  border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
}
.gallery-photo-item:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
.gallery-photo-item img {
  width: 100%; height: 180px; object-fit: cover; display: block;
}
.gallery-caption {
  padding: 0.7rem 0.9rem;
  font-family: var(--font-mono); font-size: 0.62rem;
  color: var(--muted); letter-spacing: 0.1em; line-height: 1.5;
}

.slide-gallery-label {
  font-family: var(--font-mono); font-size: 0.62rem; color: var(--muted);
  letter-spacing: 0.22em; text-transform: uppercase; margin-bottom: 1.2rem;
  padding-bottom: 0.8rem; border-bottom: 1px solid var(--divider);
}
.gallery-slides-row {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.2rem;
}
.slide-item {
  background: var(--card); border: 1px solid var(--blue-border);
  border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
  cursor: pointer;
}
.slide-item:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
.slide-item img { width: 100%; height: auto; display: block; }

/* ── Tech Articles (Gallery by slide title) ── */
#gallery { background: var(--surface); }

.tech-article {
  background: var(--card);
  border: 1px solid var(--blue-border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-sm);
}

.tech-article-header {
  display: flex; align-items: center; gap: 1.4rem;
  padding: 1.6rem 2rem;
  border-bottom: 1px solid var(--divider);
  background: var(--surface);
}
.tech-article-num {
  font-family: var(--font-display); font-size: 2.2rem; font-weight: 800;
  color: var(--blue); line-height: 1; flex-shrink: 0;
  opacity: 0.25; letter-spacing: -0.04em;
}
.tech-article-title {
  font-family: var(--font-display); font-size: 1.35rem; font-weight: 700;
  color: var(--text); margin: 0 0 0.2rem;
}
.tech-article-sub {
  font-family: var(--font-mono); font-size: 0.62rem; color: var(--muted);
  letter-spacing: 0.18em; text-transform: uppercase; margin: 0;
}

.tech-article-body {
  display: grid; grid-template-columns: 1fr 380px;
  gap: 0; align-items: start;
}
.tech-article-body-video {
  grid-template-columns: 1fr 480px;
}
.tech-article-body-full {
  display: block;
}
.tech-article-body-full .tech-article-text { border-right: none; }
.tech-article-body-full .tech-article-media { padding-top: 0; }

.tech-article-text {
  padding: 2rem; border-right: 1px solid var(--divider);
}
.tech-intro {
  font-size: 0.95rem; color: var(--text-mid); line-height: 1.85;
  margin-bottom: 1.6rem;
}
.tech-label {
  font-family: var(--font-mono); font-size: 0.62rem; color: var(--blue);
  letter-spacing: 0.22em; text-transform: uppercase; margin-bottom: 0.9rem;
  display: flex; align-items: center; gap: 0.6rem;
}
.tech-label::before { content:''; width:18px; height:2px; background:var(--blue); flex-shrink:0; }

.tech-feat-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.9rem; margin-bottom: 1.6rem; }
.tech-feat {
  background: var(--surface); border-radius: var(--radius);
  padding: 1rem 1.1rem; border: 1px solid var(--divider);
}
.tech-feat-title { font-family: var(--font-display); font-size: 0.88rem; font-weight: 700; color: var(--text); margin-bottom: 0.35rem; }
.tech-feat p { font-size: 0.8rem; color: var(--muted); line-height: 1.7; margin: 0; }

.tech-badge-row { display: flex; align-items: center; gap: 0.6rem; flex-wrap: wrap; margin-bottom: 0.5rem; }
.tech-badge {
  font-family: var(--font-display); font-size: 0.82rem; font-weight: 700;
  color: var(--blue); background: var(--blue-pale); border: 1px solid var(--blue-border);
  border-radius: var(--radius); padding: 0.35rem 0.85rem;
}
.tech-badge-sep { font-weight: 700; color: var(--muted); }
.tech-badge-patent {
  font-family: var(--font-mono); font-size: 0.6rem; color: var(--muted);
  background: var(--surface); border: 1px solid var(--divider);
  border-radius: var(--radius); padding: 0.3rem 0.7rem; letter-spacing: 0.12em;
}

.tech-config-row { display: grid; grid-template-columns: 1fr 1fr; gap: 0.9rem; margin-bottom: 1.2rem; }
.tech-config {
  background: var(--surface); border-radius: var(--radius);
  padding: 1rem 1.1rem; border: 1px solid var(--divider);
}
.tech-config-title { font-family: var(--font-display); font-size: 0.88rem; font-weight: 700; color: var(--text); margin-bottom: 0.4rem; }
.tech-config p { font-size: 0.8rem; color: var(--muted); line-height: 1.7; margin: 0; }

.tech-stats-row { display: flex; gap: 1.5rem; margin-bottom: 0.5rem; }
.tech-stat { text-align: center; background: var(--blue-pale); border: 1px solid var(--blue-border); border-radius: var(--radius); padding: 1.2rem 1.8rem; flex: 1; }
.tech-stat-num { font-family: var(--font-display); font-size: 2.6rem; font-weight: 800; color: var(--blue); line-height: 1; }
.tech-stat-num span { font-size: 1.4rem; }
.tech-stat-desc { font-size: 0.75rem; color: var(--muted); margin-top: 0.4rem; line-height: 1.55; }

.tech-control-points { display: flex; flex-direction: column; gap: 0.7rem; margin-bottom: 0.5rem; }
.tech-cp { display: flex; gap: 0.9rem; align-items: flex-start; padding: 0.8rem; background: var(--surface); border-radius: var(--radius); border: 1px solid var(--divider); }
.tech-cp-num { width: 26px; height: 26px; border-radius: 50%; background: var(--blue); color: #fff; font-family: var(--font-display); font-size: 0.78rem; font-weight: 700; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 2px; }
.tech-cp strong { font-size: 0.88rem; color: var(--text); display: block; margin-bottom: 0.2rem; }
.tech-cp p { font-size: 0.8rem; color: var(--muted); line-height: 1.65; margin: 0; }

.tech-list { list-style: none; display: flex; flex-direction: column; gap: 0.5rem; margin-bottom: 0.5rem; }
.tech-list li { font-size: 0.86rem; color: var(--text-mid); display: flex; gap: 0.65rem; align-items: flex-start; }
.tech-list li::before { content:'·'; color: var(--blue); font-weight: 700; flex-shrink: 0; }
.tech-list-num { list-style: none; display: flex; flex-direction: column; gap: 0.5rem; counter-reset: step; margin-bottom: 0.5rem; }
.tech-list-num li { font-size: 0.86rem; color: var(--text-mid); display: flex; gap: 0.65rem; align-items: flex-start; counter-increment: step; }
.tech-list-num li::before { content: counter(step); width: 20px; height: 20px; border-radius: 50%; background: var(--blue-dim); color: var(--blue); font-family: var(--font-mono); font-size: 0.65rem; font-weight: 700; display: flex; align-items: center; justify-content: center; flex-shrink: 0; border: 1px solid var(--blue-border); }

.tech-conclusion {
  margin-top: 1.4rem; padding: 1rem 1.2rem;
  background: var(--blue-pale); border-left: 3px solid var(--blue);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 0.86rem; color: var(--text-mid); line-height: 1.75;
}
.tech-conclusion strong { color: var(--blue); }

.tech-article-media { padding: 1.5rem; display: flex; flex-direction: column; gap: 1rem; }
.tech-media-caption {
  font-family: var(--font-mono); font-size: 0.6rem; color: var(--muted);
  letter-spacing: 0.12em; text-transform: uppercase; margin-bottom: -0.4rem;
}
.tech-photo-row { display: grid; grid-template-columns: 1fr 1fr; gap: 0.6rem; }
.tech-photo-row img { width: 100%; height: 140px; object-fit: cover; border-radius: var(--radius); display: block; }
.tech-photo-row-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 0.5rem; }
.tech-photo-row-3 img { width: 100%; height: 90px; object-fit: cover; border-radius: var(--radius); display: block; }

/* ── Enlarged showcase grids (used by full-width tech articles) ── */
.tech-showcase { display: grid; gap: 1.2rem; margin-top: 1.5rem; }
.tech-showcase.cols-2 { grid-template-columns: 1fr 1fr; }
.tech-showcase.cols-3 { grid-template-columns: 1fr 1fr 1fr; }
.tech-showcase.cols-4 { grid-template-columns: repeat(4, 1fr); }
.tech-showcase-item { display: flex; flex-direction: column; gap: 0.6rem; }
.tech-showcase-item img {
  width: 100%; height: 300px; object-fit: contain;
  background: var(--surface); border: 1px solid var(--blue-border);
  border-radius: var(--radius); padding: 0.7rem; display: block;
}
.tech-showcase-item.photo img { object-fit: cover; padding: 0; }
.tech-showcase.cols-4 .tech-showcase-item img { height: 220px; }
.tech-showcase-caption {
  font-family: var(--font-mono); font-size: 0.62rem; color: var(--muted);
  letter-spacing: 0.1em; text-transform: uppercase; text-align: center;
}
.tech-photo-single { width: 100%; height: auto; border-radius: var(--radius); display: block; }
.tech-photo-full { width: 100%; height: 180px; object-fit: cover; border-radius: var(--radius); display: block; margin-top: 1rem; }
.tech-video { width: 100%; height: auto; display: block; border-radius: var(--radius); background: #000; }
.tech-video-main { width: 100%; height: auto; display: block; border-radius: 0; background: #000; align-self: stretch; min-height: 260px; }

/* ── Video Showcase ── */
.video-showcase {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 1.2rem;
  margin-bottom: 3.5rem;
  align-items: start;
}
.video-main {
  background: #000;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}
.video-side {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}
.video-side-item {
  background: #000;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.video-player {
  width: 100%;
  height: auto;
  display: block;
  max-height: 480px;
  background: #000;
}
.video-caption {
  background: var(--card);
  border-top: 1px solid var(--divider);
  padding: 0.9rem 1.1rem;
}
.video-caption-title {
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.25rem;
}
.video-caption p {
  font-size: 0.78rem;
  color: var(--muted);
  line-height: 1.6;
}

/* ── Responsive ── */
@media (max-width: 1100px) {
  nav { padding: 0 2rem; }
  section { padding: 5rem 2rem; }
  #hero { padding: 0 2rem; }
  .about-grid, .hiw-layout { grid-template-columns: 1fr; gap: 3rem; }
  .products-grid { grid-template-columns: 1fr; }
  .services-grid { grid-template-columns: 1fr 1fr; }
  .challenges-grid { grid-template-columns: 1fr 1fr; }
  .challenge-wide { grid-column: span 2; }
  .process-steps { flex-direction: column; }
  .process-arrow { display: none; }
  .process-step { border-right: none; border-bottom: 1px solid var(--divider); }
  .process-step.last { border-bottom: none; }
  .value-props { grid-template-columns: 1fr; }
  .team-grid { grid-template-columns: 1fr; }
  .team-stats { flex-direction: column; gap: 1.5rem; text-align: center; }
  .contact-layout { grid-template-columns: 1fr; gap: 3rem; }
  .sim-layout { grid-template-columns: 1fr; }
  .waveform-canvases { grid-template-columns: 1fr; }
  .gallery-photos { grid-template-columns: 1fr 1fr; }
  .gallery-slides-row { grid-template-columns: 1fr 1fr; }
  .video-showcase { grid-template-columns: 1fr; }
  .tech-article-body, .tech-article-body-video { grid-template-columns: 1fr; }
  .tech-article-text { border-right: none; border-bottom: 1px solid var(--divider); }
  .tech-feat-grid { grid-template-columns: 1fr; }
  .tech-config-row { grid-template-columns: 1fr; }
  .tech-photo-row-3 { grid-template-columns: 1fr 1fr; }
  .tech-showcase.cols-3, .tech-showcase.cols-4 { grid-template-columns: 1fr 1fr; }
  .tech-stats-row { flex-wrap: wrap; }
  .tech-video-main { min-height: auto; }
  footer { flex-direction: column; gap: 0.5rem; text-align: center; }
}
@media (max-width: 640px) {
  .nav-links { display: none; }
  h1.hero-title { font-size: 2.2rem; }
  .services-grid { grid-template-columns: 1fr; }
  .challenges-grid { grid-template-columns: 1fr; }
  .challenge-wide { grid-column: span 1; }
  .sim-machines { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .gallery-photos, .gallery-slides-row { grid-template-columns: 1fr; }
  .tech-showcase.cols-2, .tech-showcase.cols-3, .tech-showcase.cols-4 { grid-template-columns: 1fr; }
}