/* =============================================================
   DATATREE Inc. — Home Page Styles
   ============================================================= */

/* ---------- Hero ---------- */
.hero{
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--gradient-dark);
  overflow: hidden;
  padding-top: var(--header-h);
}
.hero::before{
  content: '';
  position: absolute; inset: 0;
  background:
    radial-gradient(circle at 20% 25%, rgba(67,135,240,.4), transparent 42%),
    radial-gradient(circle at 82% 70%, rgba(52,214,196,.28), transparent 46%);
  animation: heroGlow 10s ease-in-out infinite alternate;
}
@keyframes heroGlow{
  0%{ opacity: .75; }
  100%{ opacity: 1; }
}
.hero-grid{
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(circle at 60% 40%, #000 10%, transparent 70%);
}
.hero .container{
  position: relative;
  z-index: 3;
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  align-items: center;
  gap: 56px;
  padding-top: 40px;
  padding-bottom: 60px;
}
.hero-copy .eng-tag{
  font-family: 'Manrope', sans-serif;
  color: var(--brand-cyan);
  letter-spacing: .22em;
  font-weight: 700;
  font-size: .92rem;
  margin-bottom: 22px;
  display: inline-block;
}
.hero-copy h1{
  color: #fff;
  font-size: clamp(2.6rem, 5.4vw, 4.4rem);
  font-weight: 800;
  line-height: 1.12;
  margin-bottom: 22px;
}
.hero-copy h1 span{
  background: linear-gradient(120deg, #4387f0, #34d6c4);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-copy p{
  color: rgba(255,255,255,.72);
  font-size: 1.12rem;
  max-width: 520px;
  margin-bottom: 38px;
}
.hero-actions{ display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 56px; }

.hero-stats{ display: flex; gap: 44px; flex-wrap: wrap; }
.hero-stats .stat-num{
  font-family: 'Manrope', sans-serif;
  font-size: 2.1rem;
  font-weight: 800;
  color: #fff;
}
.hero-stats .stat-num span{ color: var(--brand-cyan); }
.hero-stats .stat-label{ font-size: .82rem; color: rgba(255,255,255,.55); margin-top: 4px; letter-spacing: .04em; }

/* Hero visual: fixed-ratio frame keeps the illustration from ever
   stretching tall/narrow — image is contained (object-fit) inside it. */
.hero-visual{
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  max-width: 520px;
  aspect-ratio: 4 / 3;
  margin: 0 auto;
}
.hero-visual::before{
  content: '';
  position: absolute;
  width: 78%; height: 78%;
  background: radial-gradient(circle, rgba(67,135,240,.45), rgba(52,214,196,.2) 55%, transparent 75%);
  filter: blur(20px);
  z-index: 0;
  animation: pulseGlow 5s ease-in-out infinite;
}
@keyframes pulseGlow{
  0%,100%{ opacity: .7; transform: scale(1); }
  50%{ opacity: 1; transform: scale(1.06); }
}
.hero-visual img{
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter: drop-shadow(0 25px 45px rgba(0,0,0,.35));
  animation: floatY 6s ease-in-out infinite;
}
@keyframes floatY{
  0%,100%{ transform: translateY(0); }
  50%{ transform: translateY(-14px); }
}
.hero-scroll{
  position: absolute;
  bottom: 26px; left: 50%; transform: translateX(-50%);
  z-index: 3;
  color: rgba(255,255,255,.6);
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  font-family: 'Manrope',sans-serif; font-size: .74rem; letter-spacing: .18em;
}
.hero-scroll .mouse{
  width: 24px; height: 38px;
  border: 2px solid rgba(255,255,255,.4);
  border-radius: 14px;
  position: relative;
}
.hero-scroll .mouse::before{
  content: '';
  position: absolute; top: 6px; left: 50%; transform: translateX(-50%);
  width: 4px; height: 8px; border-radius: 2px;
  background: var(--brand-cyan);
  animation: scrollDot 1.8s ease-in-out infinite;
}
@keyframes scrollDot{
  0%{ opacity: 1; top: 6px; }
  100%{ opacity: 0; top: 18px; }
}

@media (max-width: 960px){
  .hero .container{ grid-template-columns: 1fr; text-align: center; padding-top: 20px; }
  .hero-copy p{ margin-left: auto; margin-right: auto; }
  .hero-actions{ justify-content: center; }
  .hero-stats{ justify-content: center; }
  .hero-visual{ order: -1; margin-bottom: 20px; max-width: 380px; }
}

@media (max-width: 520px){
  .hero-visual{ max-width: 300px; }
}

/* ---------- Business cards ---------- */
.biz-section{ background: var(--bg-light); }
.biz-grid{
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 26px;
}
.biz-card{
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 40px 30px;
  box-shadow: var(--shadow-card);
  transition: transform .4s var(--ease), box-shadow .4s var(--ease);
  position: relative;
  overflow: hidden;
}
.biz-card::after{
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 4px;
  background: var(--gradient-brand);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .4s var(--ease);
}
.biz-card:hover{ transform: translateY(-10px); box-shadow: var(--shadow-hover); }
.biz-card:hover::after{ transform: scaleX(1); }
.biz-icon{
  width: 62px; height: 62px;
  border-radius: 18px;
  background: var(--bg-soft);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 24px;
}
.biz-icon img{ width: 32px; height: 32px; }
.biz-card h3{ font-size: 1.2rem; font-weight: 800; margin-bottom: 14px; }
.biz-card ul{ display: flex; flex-direction: column; gap: 8px; margin-bottom: 20px; }
.biz-card li{ font-size: .9rem; color: var(--text-muted); position: relative; padding-left: 14px; }
.biz-card li::before{ content: ''; position: absolute; left: 0; top: 9px; width: 5px; height: 5px; border-radius: 50%; background: var(--brand-blue); }
.biz-more{ display: inline-flex; align-items: center; gap: 6px; font-weight: 700; font-size: .85rem; color: var(--brand-blue); }
.biz-more i{ transition: transform .3s var(--ease); }
.biz-card:hover .biz-more i{ transform: translateX(5px); }

@media (max-width: 1080px){ .biz-grid{ grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px){ .biz-grid{ grid-template-columns: 1fr; } }

/* ---------- Process ---------- */
.process-section{ background: #fff; }
.process-grid{
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  position: relative;
}
.process-step{
  text-align: center;
  padding: 0 20px;
  position: relative;
}
.process-step:not(:last-child)::after{
  content: '';
  position: absolute;
  top: 38px; right: -10%;
  width: 20%; height: 2px;
  background: repeating-linear-gradient(90deg, var(--brand-blue) 0 6px, transparent 6px 12px);
  opacity: .5;
}
.process-num{
  width: 76px; height: 76px;
  border-radius: 50%;
  background: var(--gradient-brand);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-family: 'Manrope',sans-serif;
  font-weight: 800;
  font-size: 1.5rem;
  margin: 0 auto 24px;
  box-shadow: 0 15px 30px rgba(67,135,240,.3);
}
.process-step h4{ font-size: 1.1rem; margin-bottom: 10px; font-weight: 800; }
.process-step p{ font-size: .88rem; color: var(--text-muted); }

@media (max-width: 860px){
  .process-grid{ grid-template-columns: 1fr 1fr; row-gap: 50px; }
  .process-step:nth-child(2)::after{ display: none; }
  .process-step:not(:last-child)::after{ display: none; }
}

/* ---------- Partners marquee section ---------- */
.partners-section{ background: var(--bg-light); }

/* ---------- Portfolio ---------- */
.portfolio-section{ background: #fff; }
.portfolio-grid{
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.portfolio-card{
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--bg-light);
  box-shadow: var(--shadow-soft);
  transition: transform .4s var(--ease), box-shadow .4s var(--ease);
  display: block;
}
.portfolio-card:hover{ transform: translateY(-8px); box-shadow: var(--shadow-hover); }
.portfolio-thumb{
  aspect-ratio: 4/3;
  overflow: hidden;
  background: #fff;
  display: flex; align-items: center; justify-content: center;
  padding: 26px;
}
.portfolio-thumb img{ width: 100%; height: 100%; object-fit: contain; transition: transform .5s var(--ease); }
.portfolio-card:hover .portfolio-thumb img{ transform: scale(1.06); }
.portfolio-info{ padding: 18px 20px 22px; }
.portfolio-info span{ font-size: .92rem; font-weight: 700; color: var(--text-dark); line-height: 1.5; }

@media (max-width: 1080px){ .portfolio-grid{ grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px){ .portfolio-grid{ grid-template-columns: 1fr; } }

.section-cta{ text-align: center; margin-top: 50px; }

/* ---------- CTA banner ---------- */
.cta-banner{
  background: var(--gradient-brand);
  border-radius: var(--radius-lg);
  padding: 70px 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  flex-wrap: wrap;
  position: relative;
  overflow: hidden;
}
.cta-banner::before{
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(circle at 85% 20%, rgba(255,255,255,.25), transparent 55%);
}
.cta-banner h3{ color: #fff; font-size: clamp(1.5rem, 3vw, 2.1rem); font-weight: 800; position: relative; z-index: 2; }
.cta-banner p{ color: rgba(255,255,255,.85); margin-top: 10px; position: relative; z-index: 2; }
.cta-banner .btn{ position: relative; z-index: 2; background: #fff; color: var(--brand-blue-dark); }
.cta-banner .btn:hover{ transform: translateY(-3px); box-shadow: 0 16px 30px rgba(0,0,0,.2); }