:root {
  --zst-navy: #011423;
  --zst-yellow: #ffce02;
  --zst-white: #ffffff;
  --zst-gray: #f5f7fa;
  --zst-blue: #0d3b66;
  --zst-electric: #006dff;
  --zst-text: #17324d;
  --zst-muted: #5d7288;
  --zst-line: rgba(1, 20, 35, 0.08);
  --zst-radius: 20px;
  --zst-shadow: 0 18px 48px rgba(1, 20, 35, 0.08);
}

.zst-page {
  background:
    radial-gradient(circle at top left, rgba(0, 109, 255, 0.08), transparent 22%),
    linear-gradient(180deg, #f8fbff 0%, #ffffff 32%, #f5f7fa 100%);
  color: var(--zst-text);
}

.zst-hero,
.zst-section {
  padding: 48px 0;
}

.zst-hero {
  background:
    linear-gradient(180deg, rgba(2, 15, 30, 0.82) 0%, rgba(2, 15, 30, 0.78) 100%),
    radial-gradient(circle at 14% 16%, rgba(255, 206, 2, 0.18), transparent 22%),
    radial-gradient(circle at 86% 18%, rgba(0, 109, 255, 0.16), transparent 22%),
    url("https://images.unsplash.com/photo-1522071820081-009f0129c71c?auto=format&fit=crop&w=1600&q=80") center/cover no-repeat;
  padding: 74px 0 28px;
}

.zst-hero-shell {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  align-items: center;
  justify-items: center;
  text-align: center;
}

.zst-hero-copy,
.zst-hero-image,
.zst-benefit-card,
.zst-model-card,
.zst-area-card,
.zst-step,
.zst-diff-shell,
.zst-final-shell {
  border: 1px solid var(--zst-line);
  border-radius: 24px;
  box-shadow: var(--zst-shadow);
}

.zst-hero-copy {
  padding: 18px 0 6px;
  background: transparent;
  border: 0;
  box-shadow: none;
  color: var(--zst-white);
  max-width: 1180px;
}

.zst-brand-pill {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.zst-brand-pill span,
.zst-brand-pill strong,
.zst-eyebrow {
  font-family: var(--font-display);
}

.zst-brand-pill span {
  color: rgba(255, 255, 255, 0.74);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
}

.zst-brand-pill strong {
  color: var(--zst-white);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
}

.zst-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 22px;
  color: var(--zst-yellow);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  justify-content: center;
}

.zst-eyebrow::before {
  content: "";
  width: 34px;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--zst-yellow), var(--zst-electric));
}

.zst-hero-copy h1,
.zst-section-head h2,
.zst-diff-shell h2,
.zst-final-shell h2 {
  font-family: var(--font-display);
  letter-spacing: -0.06em;
}

.zst-hero-copy h1 {
  margin: 18px 0 0;
  font-size: clamp(2.6rem, 4.7vw, 4.6rem);
  line-height: 1;
  text-shadow: 0 10px 28px rgba(0, 0, 0, 0.24);
}

.zst-hero-subtitle {
  margin: 14px 0 0;
  color: rgba(255, 206, 2, 0.96);
  font-family: var(--font-display);
  font-size: clamp(0.95rem, 1.4vw, 1.15rem);
  font-weight: 700;
  letter-spacing: 0.04em;
}

.zst-hero-copy p {
  margin: 18px auto 0;
  color: rgba(255, 255, 255, 0.88);
  font-size: 1.05rem;
  line-height: 1.64;
  max-width: 84ch;
  text-shadow: 0 8px 24px rgba(0, 0, 0, 0.22);
}

.zst-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 26px;
  justify-content: center;
}

.zst-hero-visual {
  position: relative;
  min-height: 580px;
}

.zst-hero-image {
  position: relative;
  height: 100%;
  min-height: 580px;
  overflow: hidden;
}

.zst-hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.zst-hero-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(1, 20, 35, 0.08), rgba(1, 20, 35, 0.58)),
    radial-gradient(circle at top right, rgba(13, 59, 102, 0.26), transparent 24%);
}

.zst-hero-caption,
.zst-floating-card {
  position: absolute;
  padding: 14px 16px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.18);
  backdrop-filter: blur(12px);
  color: var(--zst-white);
}

.zst-hero-caption {
  left: 24px;
  right: 24px;
  bottom: 24px;
}

.zst-floating-card strong,
.zst-hero-caption strong {
  display: block;
}

.zst-floating-card span,
.zst-hero-caption span {
  display: block;
  margin-top: 4px;
  color: rgba(255, 255, 255, 0.84);
  font-size: 0.92rem;
}

.zst-fc-a { right: -12px; top: 42px; }
.zst-fc-b { left: -18px; top: 178px; }

.zst-section-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 0.82fr);
  gap: 24px;
  align-items: end;
  margin-bottom: 24px;
}

.zst-section-head h2 {
  margin: 14px 0 0;
  font-size: clamp(2rem, 3vw, 3.15rem);
  line-height: 1.03;
}

.zst-section-head p {
  margin: 0;
  color: var(--zst-muted);
  line-height: 1.66;
}

.zst-benefits {
  background: linear-gradient(180deg, #ffffff 0%, #f7fbff 100%);
}

.zst-benefit-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.zst-benefit-card,
.zst-area-card,
.zst-step {
  padding: 24px 20px;
  background: rgba(255, 255, 255, 0.96);
  text-align: center;
  transition: transform 220ms ease, box-shadow 220ms ease, border-color 220ms ease;
}

.zst-benefit-card:hover,
.zst-model-card:hover,
.zst-area-card:hover,
.zst-step:hover {
  transform: translateY(-6px);
  box-shadow: 0 26px 58px rgba(1, 20, 35, 0.12);
  border-color: rgba(0, 109, 255, 0.14);
}

.zst-icon-box {
  width: 72px;
  height: 72px;
  display: grid;
  place-items: center;
  margin: 0 auto;
  border-radius: 18px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 1), rgba(241, 247, 252, 0.96)),
    linear-gradient(135deg, rgba(0, 109, 255, 0.16), rgba(13, 59, 102, 0.1));
  color: var(--zst-electric);
  box-shadow: 0 0 0 1px rgba(0, 109, 255, 0.08), 0 14px 28px rgba(0, 109, 255, 0.08);
}

.zst-icon-box svg {
  width: 34px;
  height: 34px;
}

.zst-icon-box.small {
  width: 58px;
  height: 58px;
  margin: 0;
}

.zst-benefit-card h3,
.zst-model-copy h3,
.zst-step h3 {
  margin: 18px 0 0;
  font-family: var(--font-display);
  font-size: 1.14rem;
  line-height: 1.14;
}

.zst-benefit-card p,
.zst-model-copy p,
.zst-step p,
.zst-diff-shell p,
.zst-final-shell p {
  margin: 10px 0 0;
  color: var(--zst-muted);
  line-height: 1.58;
}

.zst-models {
  background: linear-gradient(180deg, #edf5ff 0%, #f9fbff 100%);
}

.zst-model-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.zst-model-card {
  overflow: hidden;
  background: rgba(255, 255, 255, 0.98);
}

.zst-model-image {
  height: 220px;
}

.zst-model-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.zst-model-copy {
  padding: 22px;
}

.zst-areas {
  background: linear-gradient(180deg, #ffffff 0%, #f5f8fc 100%);
}

.zst-area-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.zst-area-card {
  display: grid;
  gap: 14px;
  justify-items: center;
}

.zst-area-card span {
  font-family: var(--font-display);
  line-height: 1.34;
}

.zst-tech {
  background: linear-gradient(180deg, #f8fbff 0%, #ffffff 100%);
}

.zst-tech-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.zst-tech-grid span {
  display: grid;
  place-items: center;
  min-height: 82px;
  padding: 18px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.98);
  border: 1px solid rgba(1, 20, 35, 0.08);
  box-shadow: var(--zst-shadow);
  font-family: var(--font-display);
  color: var(--zst-blue);
}

.zst-process {
  background: linear-gradient(180deg, #f5f7fa 0%, #eef4fb 100%);
}

.zst-timeline {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 16px;
}

.zst-step {
  position: relative;
  overflow: hidden;
}

.zst-step::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 4px;
  background: linear-gradient(180deg, var(--zst-yellow), var(--zst-electric));
}

.zst-step-icon {
  width: 82px;
  height: 82px;
  display: grid;
  place-items: center;
  margin: 0 auto;
  border-radius: 50%;
  background:
    radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 1), rgba(235, 243, 252, 0.96)),
    linear-gradient(135deg, rgba(0, 109, 255, 0.16), rgba(13, 59, 102, 0.1));
  color: var(--zst-electric);
  box-shadow: 0 14px 34px rgba(0, 109, 255, 0.08);
}

.zst-step-icon svg {
  width: 36px;
  height: 36px;
}

.zst-diff {
  background: linear-gradient(180deg, #011423 0%, #0d3b66 100%);
}

.zst-diff-shell {
  padding: 30px;
  background: rgba(255, 255, 255, 0.03);
  border-color: rgba(255, 255, 255, 0.08);
  color: var(--zst-white);
}

.zst-diff-shell h2 {
  margin: 14px 0 0;
  font-size: clamp(2.2rem, 3.6vw, 3.7rem);
  line-height: 0.98;
}

.zst-eyebrow.gold {
  color: var(--zst-yellow);
}

.zst-eyebrow.gold::before {
  background: linear-gradient(90deg, #ffce02, #ffd95a);
}

.zst-diff-shell p {
  color: rgba(255, 255, 255, 0.76);
}

.zst-diff-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 24px;
}

.zst-diff-grid article {
  padding: 20px 18px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 206, 2, 0.14);
}

.zst-diff-grid strong {
  color: var(--zst-yellow);
  font-family: var(--font-display);
  font-size: 1.04rem;
}

.zst-final-cta {
  padding: 36px 0 56px;
}

.zst-final-shell {
  padding: 30px 32px;
  background:
    radial-gradient(circle at top right, rgba(255, 206, 2, 0.14), transparent 22%),
    linear-gradient(135deg, rgba(1, 20, 35, 0.98), rgba(13, 59, 102, 0.98));
  color: var(--zst-white);
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: center;
}

.zst-final-shell h2 {
  margin: 14px 0 0;
  font-size: clamp(2rem, 3.2vw, 3.2rem);
  line-height: 1;
}

.zst-final-shell p {
  color: rgba(255, 255, 255, 0.78);
  max-width: 56ch;
}

@media (max-width: 1180px) {
  .zst-hero-shell,
  .zst-section-head,
  .zst-final-shell {
    grid-template-columns: 1fr;
  }

  .zst-benefit-grid,
  .zst-model-grid,
  .zst-area-grid,
  .zst-tech-grid,
  .zst-timeline,
  .zst-diff-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 840px) {
  .zst-hero,
  .zst-section {
    padding: 34px 0;
  }

  .zst-hero-visual,
  .zst-hero-image {
    min-height: 440px;
  }

  .zst-fc-a,
  .zst-fc-b {
    position: static;
    margin-top: 14px;
  }

  .zst-hero-visual {
    display: grid;
    gap: 14px;
  }

  .zst-benefit-grid,
  .zst-model-grid,
  .zst-area-grid,
  .zst-tech-grid,
  .zst-timeline,
  .zst-diff-grid {
    grid-template-columns: 1fr;
  }

  .zst-final-shell {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 680px) {
  .zst-hero {
    padding: 54px 0 20px;
  }

  .zst-hero-copy h1 {
    font-size: clamp(2.2rem, 10vw, 3.2rem);
  }
}