/* ============================================================
   SINA Enterprise — Dark Tech Healthcare Design System
   ============================================================ */

/* --- RESET & BASE --- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg:        #06080f;
  --bg2:       #090c16;
  --bg3:       #0c1020;
  --cyan:      #00e5ff;
  --cyan-dim:  rgba(0,229,255,0.12);
  --blue:      #0055ff;
  --white:     #ffffff;
  --gray:      #7a8599;
  --gray-lt:   #aab4c4;
  --border:    rgba(0,229,255,0.14);
  --border-w:  rgba(255,255,255,0.06);
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--white);
  font-family: 'Space Grotesk', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

::-webkit-scrollbar { width: 3px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--cyan); }

/* --- TYPOGRAPHY --- */
h1 {
  font-size: clamp(2.4rem, 5.5vw, 5rem);
  font-weight: 700;
  line-height: 1.04;
  letter-spacing: -0.025em;
}
h2 {
  font-size: clamp(1.9rem, 3.8vw, 3.4rem);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.02em;
}
h3 { font-size: 1.25rem; font-weight: 600; line-height: 1.3; }
h4 { font-size: 1rem; font-weight: 600; }

.label {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--cyan);
  text-transform: uppercase;
  margin-bottom: 1.25rem;
}
.label::before {
  content: '';
  width: 2.5rem;
  height: 1px;
  background: var(--cyan);
  flex-shrink: 0;
}

/* --- BUTTONS --- */
.btn-primary {
  display: inline-block;
  padding: 0.7rem 1.6rem;
  background: var(--cyan);
  color: #000;
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: background 0.18s, transform 0.18s;
  white-space: nowrap;
}
.btn-primary:hover { background: #fff; transform: translateY(-1px); }

.btn-outline {
  display: inline-block;
  padding: 0.7rem 1.6rem;
  background: transparent;
  color: var(--white);
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  border: 1.5px solid rgba(255,255,255,0.25);
  transition: border-color 0.18s, color 0.18s;
}
.btn-outline:hover { border-color: var(--cyan); color: var(--cyan); }

/* ============================================================
   NAVIGATION
   ============================================================ */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 0 5%;
  height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(6,8,15,0.75);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--border);
  transition: background 0.3s;
}
nav.scrolled { background: rgba(6,8,15,0.97); }

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
  color: var(--white);
}
.logo-mark {
  width: 40px; height: 40px;
  border: 1.5px solid var(--cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: 0.05em;
  flex-shrink: 0;
  transition: background 0.2s;
}
.logo-mark.small { width: 34px; height: 34px; font-size: 0.72rem; }
.nav-logo:hover .logo-mark { background: var(--cyan-dim); }

.logo-text { display: flex; flex-direction: column; line-height: 1; }
.logo-name { font-size: 0.95rem; font-weight: 700; letter-spacing: 0.06em; }
.logo-sub  { font-size: 0.5rem; letter-spacing: 0.2em; color: var(--gray); text-transform: uppercase; margin-top: 2px; }

.nav-links {
  display: flex;
  gap: 2.4rem;
  list-style: none;
}
.nav-links a {
  color: var(--gray);
  text-decoration: none;
  font-size: 0.83rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  transition: color 0.2s;
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -3px; left: 0;
  width: 0; height: 1px;
  background: var(--cyan);
  transition: width 0.25s;
}
.nav-links a:hover,
.nav-links a.active { color: var(--white); }
.nav-links a:hover::after,
.nav-links a.active::after { width: 100%; }

.nav-cta { font-size: 0.78rem; padding: 0.55rem 1.2rem; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 22px; height: 1.5px;
  background: var(--white);
  transition: all 0.25s;
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background-image: url('https://images.unsplash.com/photo-1538108149393-fbbd81895907?auto=format&fit=crop&w=1920&q=80');
  background-size: cover;
  background-position: center right;
}

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

.hero-grid-overlay {
  position: absolute; inset: 0; z-index: 1;
  background-image:
    linear-gradient(rgba(0,229,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,229,255,0.025) 1px, transparent 1px);
  background-size: 70px 70px;
  pointer-events: none;
}

.hero-gradient {
  position: absolute; inset: 0; z-index: 2;
  background: linear-gradient(
    100deg,
    rgba(6,8,15,0.95) 0%,
    rgba(6,8,15,0.75) 45%,
    rgba(6,8,15,0.15) 100%
  );
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 3;
  padding: 0 5%;
  padding-top: 70px;
  max-width: 680px;
}
.hero-content .label { margin-bottom: 1.5rem; }
.hero-content h1 { margin-bottom: 1.5rem; }
.hero-content p {
  color: var(--gray-lt);
  font-size: 1.05rem;
  line-height: 1.75;
  margin-bottom: 2.5rem;
  max-width: 520px;
}
.hero-buttons { display: flex; gap: 1rem; flex-wrap: wrap; }

.hero-scroll-hint {
  position: absolute;
  bottom: 2.5rem;
  left: 5%;
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}
.scroll-line {
  width: 1px; height: 50px;
  background: linear-gradient(to bottom, var(--cyan), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}
@keyframes scrollPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}
.hero-scroll-hint span {
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--cyan);
  writing-mode: vertical-rl;
}

/* ============================================================
   TICKER
   ============================================================ */
.ticker {
  background: var(--cyan);
  overflow: hidden;
  padding: 0.7rem 0;
  white-space: nowrap;
}
.ticker-track {
  display: inline-flex;
  align-items: center;
  gap: 1.5rem;
  animation: tickerRoll 25s linear infinite;
}
.t-item {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #000;
}
.t-sep { font-size: 0.4rem; color: rgba(0,0,0,0.5); }

@keyframes tickerRoll {
  0%   { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* ============================================================
   ABOUT
   ============================================================ */
.about {
  padding: 8rem 5%;
  background: var(--bg2);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: center;
}

.about-3d {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 480px;
}

.canvas-glow-ring {
  position: absolute;
  width: 340px; height: 340px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0,229,255,0.06) 0%, transparent 70%);
  pointer-events: none;
}

#logo-canvas {
  width: 100%; height: 100%;
  display: block;
}

.logo-label-3d {
  position: absolute;
  bottom: 1.5rem;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.25em;
  color: var(--cyan);
  text-transform: uppercase;
  opacity: 0.7;
}

.about-text h2 { margin-bottom: 1.25rem; }
.about-text > p {
  color: var(--gray-lt);
  font-size: 1rem;
  line-height: 1.75;
  margin-bottom: 2.5rem;
}

.principles { display: flex; flex-direction: column; gap: 1px; background: var(--border); }

.principle {
  padding: 1.5rem 1.75rem;
  background: var(--bg2);
  border-left: 2px solid transparent;
  transition: border-color 0.25s, background 0.25s, transform 0.25s;
  cursor: default;
}
.principle:hover {
  border-left-color: var(--cyan);
  background: rgba(0,229,255,0.03);
  transform: translateX(3px);
}
.principle-num {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--cyan);
  margin-bottom: 0.4rem;
}
.principle h4 { margin-bottom: 0.35rem; }
.principle p  { color: var(--gray); font-size: 0.875rem; line-height: 1.65; }

/* ============================================================
   SERVICES
   ============================================================ */
.services {
  padding: 8rem 5%;
  background: var(--bg);
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 4rem;
}
.section-link {
  color: var(--cyan);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  transition: letter-spacing 0.2s;
}
.section-link:hover { letter-spacing: 0.2em; }

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border-w);
}

/* Service card photo strip */
.svc-photo {
  position: relative;
  height: 180px;
  margin: -2.75rem -2.25rem 2rem -2.25rem;
  overflow: hidden;
  flex-shrink: 0;
}
.svc-photo img {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.6s ease;
  filter: saturate(0.7) brightness(0.75);
}
.svc-photo-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(to bottom, transparent 30%, var(--bg) 100%);
}
.service-card:hover .svc-photo img {
  transform: scale(1.05);
  filter: saturate(0.9) brightness(0.85);
}

.service-card {
  padding: 2.75rem 2.25rem;
  background: var(--bg);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  transition: background 0.25s;
}
.service-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}
.service-card:hover { background: rgba(0,229,255,0.025); }
.service-card:hover::before { transform: scaleX(1); }

.service-num {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--cyan);
  margin-bottom: 1.25rem;
}
.svc-icon-wrap {
  margin-bottom: 1.5rem;
  width: 80px; height: 80px;
}
.service-card h3 { margin-bottom: 0.85rem; }
.service-card p  { color: var(--gray); font-size: 0.88rem; line-height: 1.7; flex: 1; }
.service-link {
  display: inline-block;
  margin-top: 2rem;
  color: var(--cyan);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-decoration: none;
  transition: letter-spacing 0.2s;
}
.service-link:hover { letter-spacing: 0.2em; }

/* ============================================================
   PROCESS
   ============================================================ */
.process {
  padding: 8rem 5%;
  background: var(--bg2);
}

.process .section-header { margin-bottom: 5rem; }

.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2.5rem;
  position: relative;
}
.process-steps::before {
  content: '';
  position: absolute;
  top: 23px;
  left: calc(12.5% + 12px);
  right: calc(12.5% + 12px);
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan) 20%, var(--cyan) 80%, transparent);
  opacity: 0.2;
}

.step { position: relative; }
.step-num {
  width: 46px; height: 46px;
  border: 1.5px solid var(--cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--cyan);
  background: var(--bg2);
  margin-bottom: 1.5rem;
  position: relative;
  z-index: 1;
  transition: background 0.25s;
}
.step:hover .step-num { background: var(--cyan-dim); }
.step h4 { margin-bottom: 0.5rem; font-size: 0.95rem; }
.step p   { color: var(--gray); font-size: 0.85rem; line-height: 1.65; }

/* ============================================================
   MARKETS
   ============================================================ */
.markets {
  padding: 8rem 5%;
  background: var(--bg);
  position: relative;
  min-height: 700px;
  overflow: hidden;
}

#dna-canvas {
  position: absolute;
  right: 0; top: 0; bottom: 0;
  width: 48%; height: 100%;
  z-index: 0;
  pointer-events: none;
}

.markets::after {
  content: '';
  position: absolute;
  right: 0; top: 0; bottom: 0;
  width: 48%;
  background: linear-gradient(90deg, var(--bg) 0%, transparent 30%);
  z-index: 1;
  pointer-events: none;
}

.markets-content {
  position: relative;
  z-index: 2;
  max-width: 580px;
}
.markets-content h2 { margin-bottom: 1rem; }
.markets-desc {
  color: var(--gray-lt);
  font-size: 0.95rem;
  line-height: 1.75;
  margin-bottom: 3rem;
}

.markets-cards { display: flex; flex-direction: column; gap: 1px; background: var(--border-w); }

.market-card {
  padding: 2rem 1.75rem;
  background: var(--bg);
  background-size: cover;
  background-position: center;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: start;
  gap: 1.5rem;
  position: relative;
  overflow: hidden;
  transition: transform 0.25s;
}
.market-card-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(90deg, rgba(6,8,15,0.92) 0%, rgba(6,8,15,0.75) 60%, rgba(6,8,15,0.5) 100%);
  transition: background 0.3s;
  z-index: 0;
}
.market-info, .market-arrow { position: relative; z-index: 1; }
.market-card:hover .market-card-overlay {
  background: linear-gradient(90deg, rgba(6,8,15,0.88) 0%, rgba(6,8,15,0.65) 60%, rgba(6,8,15,0.4) 100%);
}

.market-tag {
  font-size: 0.63rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--cyan);
  text-transform: uppercase;
  margin-bottom: 0.4rem;
}
.market-card h3 { font-size: 1.05rem; margin-bottom: 0.4rem; }
.market-card p  { color: var(--gray); font-size: 0.85rem; line-height: 1.65; }
.market-arrow {
  color: var(--cyan);
  font-size: 1.1rem;
  opacity: 0.4;
  margin-top: 2rem;
  transition: opacity 0.2s, transform 0.2s;
}
.market-card:hover .market-arrow { opacity: 1; transform: translateX(4px); }

/* ============================================================
   STATS
   ============================================================ */
.stats {
  padding: 5.5rem 5%;
  background: var(--cyan);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
}
.stat-item { }
.stat-num {
  font-size: clamp(2.2rem, 4vw, 3.8rem);
  font-weight: 700;
  color: #000;
  line-height: 1;
  margin-bottom: 0.45rem;
}
.stat-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: rgba(0,0,0,0.55);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* ============================================================
   CONTACT
   ============================================================ */
.contact {
  padding: 8rem 5%;
  background: var(--bg2);
  background-image: url('https://images.unsplash.com/photo-1576091160399-112ba8d25d1d?auto=format&fit=crop&w=1800&q=80');
  background-size: cover;
  background-position: center left;
  position: relative;
  overflow: hidden;
}
.contact::after {
  content: '';
  position: absolute; inset: 0;
  background: rgba(9,12,22,0.88);
  z-index: 0;
  pointer-events: none;
}
.contact-inner { position: relative; z-index: 1; }

.contact::before {
  content: '';
  position: absolute;
  top: -200px; right: -200px;
  width: 600px; height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0,229,255,0.04) 0%, transparent 60%);
  pointer-events: none;
}

.contact-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6rem;
  align-items: start;
  position: relative;
  z-index: 1;
}

.contact-text h2 { margin-bottom: 1rem; }
.contact-text > p {
  color: var(--gray-lt);
  font-size: 1rem;
  line-height: 1.75;
  margin-bottom: 2.5rem;
}

.contact-details { display: flex; flex-direction: column; gap: 1rem; }
.contact-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  color: var(--gray-lt);
  font-size: 0.9rem;
}
.contact-icon {
  width: 38px; height: 38px;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  flex-shrink: 0;
}

.contact-form { display: flex; flex-direction: column; gap: 1.1rem; }

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.form-group { display: flex; flex-direction: column; gap: 0.4rem; }
.form-group label {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--gray);
  text-transform: uppercase;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.85rem 1rem;
  background: rgba(255,255,255,0.035);
  border: 1px solid var(--border);
  color: var(--white);
  font-family: inherit;
  font-size: 0.9rem;
  outline: none;
  transition: border-color 0.2s, background 0.2s;
  appearance: none;
  -webkit-appearance: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--cyan);
  background: rgba(0,229,255,0.04);
}
.form-group select { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%2300e5ff' d='M6 8L0 0h12z'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 1rem center; padding-right: 2.5rem; }
.form-group select option { background: #090c16; color: #fff; }
.form-group textarea { min-height: 110px; resize: vertical; }
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--gray); }

.btn-submit {
  padding: 1rem 2rem;
  background: var(--cyan);
  color: #000;
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: none;
  cursor: pointer;
  transition: background 0.18s, transform 0.18s;
  align-self: flex-start;
}
.btn-submit:hover { background: #fff; transform: translateY(-1px); }

.form-success {
  font-size: 0.85rem;
  color: #00e5a0;
  display: none;
  margin-top: 0.25rem;
}
.form-success.visible { display: block; }

/* ============================================================
   FOOTER
   ============================================================ */
footer {
  padding: 3.5rem 5%;
  background: var(--bg);
  border-top: 1px solid var(--border);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 2rem;
}

.footer-brand { }
.footer-logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  margin-bottom: 0.75rem;
}
.footer-brand p {
  color: var(--gray);
  font-size: 0.82rem;
  line-height: 1.6;
}

.footer-nav {
  display: flex;
  gap: 2rem;
}
.footer-nav a {
  color: var(--gray);
  font-size: 0.8rem;
  text-decoration: none;
  transition: color 0.2s;
}
.footer-nav a:hover { color: var(--cyan); }

.footer-copy {
  text-align: right;
}
.footer-copy p {
  color: var(--gray);
  font-size: 0.78rem;
  line-height: 1.7;
}
.footer-pk {
  color: var(--cyan) !important;
  font-weight: 600;
  font-size: 0.7rem !important;
  letter-spacing: 0.1em;
}

/* ============================================================
   WHATSAPP BUTTON
   ============================================================ */
.whatsapp-btn {
  position: fixed;
  bottom: 2rem; right: 2rem;
  z-index: 999;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 1.2rem;
  background: #25D366;
  color: #fff;
  text-decoration: none;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  box-shadow: 0 4px 24px rgba(37,211,102,0.35);
  transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
}
.whatsapp-btn:hover {
  background: #128c7e;
  transform: translateY(-2px);
  box-shadow: 0 6px 30px rgba(37,211,102,0.45);
}

/* ============================================================
   SCROLL REVEAL
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* stagger children automatically */
.principle:nth-child(1) { transition-delay: 0.05s; }
.principle:nth-child(2) { transition-delay: 0.15s; }
.principle:nth-child(3) { transition-delay: 0.25s; }
.service-card:nth-child(1) { transition-delay: 0.05s; }
.service-card:nth-child(2) { transition-delay: 0.15s; }
.service-card:nth-child(3) { transition-delay: 0.25s; }
.step:nth-child(1) { transition-delay: 0.05s; }
.step:nth-child(2) { transition-delay: 0.15s; }
.step:nth-child(3) { transition-delay: 0.25s; }
.step:nth-child(4) { transition-delay: 0.35s; }
.market-card:nth-child(1) { transition-delay: 0.05s; }
.market-card:nth-child(2) { transition-delay: 0.15s; }
.market-card:nth-child(3) { transition-delay: 0.25s; }
.stat-item:nth-child(1) { transition-delay: 0.05s; }
.stat-item:nth-child(2) { transition-delay: 0.12s; }
.stat-item:nth-child(3) { transition-delay: 0.19s; }
.stat-item:nth-child(4) { transition-delay: 0.26s; }

/* apply reveal to common elements */
.principle,
.service-card,
.step,
.market-card,
.stat-item,
.about-text,
.section-header,
.markets-content > *,
.contact-text,
.contact-form,
.process-steps,
.services-grid {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}
.principle.visible,
.service-card.visible,
.step.visible,
.market-card.visible,
.stat-item.visible,
.about-text.visible,
.section-header.visible,
.markets-content > .visible,
.contact-text.visible,
.contact-form.visible,
.process-steps.visible,
.services-grid.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1100px) {
  .about { grid-template-columns: 1fr; }
  .about-3d { height: 340px; }
  .services-grid { grid-template-columns: 1fr; }
  .contact-inner { grid-template-columns: 1fr; gap: 3.5rem; }
  footer { grid-template-columns: 1fr; gap: 2.5rem; }
  .footer-copy { text-align: left; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 2.5rem; }
}

@media (max-width: 860px) {
  .process-steps { grid-template-columns: 1fr 1fr; }
  .process-steps::before { display: none; }
  #dna-canvas { display: none; }
  .markets::after { display: none; }
  .markets-content { max-width: 100%; }
  .section-header { flex-direction: column; align-items: flex-start; gap: 1rem; }
}

@media (max-width: 700px) {
  .nav-links, .nav-cta { display: none; }
  .nav-toggle { display: flex; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 70px; left: 0; right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 1.5rem 5%;
    gap: 1.5rem;
  }
  .hero-content p { max-width: 100%; }
  .process-steps { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .form-row { grid-template-columns: 1fr; }
  .footer-nav { flex-wrap: wrap; gap: 1rem; }
}

@media (max-width: 480px) {
  h1 { font-size: 2.2rem; }
  h2 { font-size: 1.75rem; }
  .hero-buttons { flex-direction: column; align-items: flex-start; }
}