/* Giao diện riêng cho trang giới thiệu; tách file để cập nhật độc lập cache chung. */
.intro-page-body::before {
  height: 520px;
  background:
    radial-gradient(circle at 12% 5%, rgba(185, 28, 28, 0.18), transparent 36%),
    radial-gradient(circle at 90% 14%, rgba(21, 128, 61, 0.09), transparent 30%);
}

.intro-page { gap: 12px; padding: 12px 10px 24px; }
.intro-page .back-btn { width: fit-content; margin-bottom: 0; }

.intro-hero,
.intro-video-section,
.intro-value-section,
.intro-next-step {
  border: 1px solid var(--border-color);
  border-radius: 22px;
  background: var(--container-bg);
  box-shadow: var(--shadow-sm);
}

.intro-hero {
  position: relative;
  overflow: hidden;
  padding: 20px 18px 22px;
  background: linear-gradient(145deg, rgba(185, 28, 28, 0.11), transparent 58%), var(--container-bg);
}

.intro-hero::after {
  content: "";
  position: absolute;
  width: 150px;
  height: 150px;
  right: -68px;
  top: -72px;
  border: 28px solid rgba(185, 28, 28, 0.07);
  border-radius: 50%;
  pointer-events: none;
}

.intro-brand-row { display: flex; align-items: center; gap: 11px; margin-bottom: 20px; }
.intro-page-logo { width: 52px; height: 52px; border-radius: 14px; object-fit: cover; box-shadow: var(--shadow-sm); }
.intro-brand-copy { display: flex; flex-direction: column; min-width: 0; }
.intro-brand-copy strong { color: var(--text-primary); font-size: 0.76rem; line-height: 1.35; }
.intro-brand-copy span { color: var(--text-muted); font-size: 0.64rem; margin-top: 2px; }

.intro-page-eyebrow,
.intro-section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--accent-color);
  font-size: 0.67rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.055em;
}

.intro-page-title {
  max-width: 470px;
  color: var(--text-primary);
  font-size: clamp(1.65rem, 7vw, 2.35rem);
  line-height: 1.12;
  letter-spacing: -0.045em;
  margin: 8px 0 11px;
}

.intro-page-lead { max-width: 490px; color: var(--text-secondary); font-size: 0.82rem; line-height: 1.7; margin: 0; }
.intro-video-section,
.intro-value-section,
.intro-next-step { padding: 17px 14px; }

.intro-section-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; margin: 0 2px 13px; }
.intro-section-heading h2,
.intro-value-section h2,
.intro-next-step h2 { color: var(--text-primary); font-size: 1.02rem; line-height: 1.35; margin: 3px 0 0; }

.intro-video-badge {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  flex-shrink: 0;
  color: var(--accent-color);
  background: var(--accent-soft);
  border-radius: 999px;
  padding: 6px 8px;
  font-size: 0.61rem;
  font-weight: 800;
}

.intro-video-frame {
  width: min(100%, 560px);
  margin: 0 auto;
  aspect-ratio: 16 / 9;
  border-radius: 18px;
  overflow: hidden;
  background: #050505;
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.22);
}

.intro-video { display: block; width: 100%; height: 100%; object-fit: contain; }
.intro-video-caption { display: flex; align-items: center; justify-content: center; gap: 5px; color: var(--text-muted); font-size: 0.68rem; line-height: 1.5; text-align: center; margin: 11px 0 0; }
.intro-value-section h2,
.intro-next-step h2 { margin-bottom: 12px; }
.intro-value-list { display: grid; gap: 8px; }

.intro-value-item {
  display: flex;
  align-items: flex-start;
  gap: 11px;
  padding: 12px;
  border: 1px solid var(--border-color);
  border-radius: 15px;
  background: rgba(128, 128, 128, 0.045);
}

.intro-value-icon { display: flex; align-items: center; justify-content: center; flex-shrink: 0; width: 37px; height: 37px; border-radius: 11px; color: var(--accent-color); background: var(--accent-soft); font-size: 1rem; }
.intro-value-item div:last-child { display: flex; flex-direction: column; }
.intro-value-item strong { color: var(--text-primary); font-size: 0.77rem; }
.intro-value-item span { color: var(--text-secondary); font-size: 0.69rem; line-height: 1.55; margin-top: 3px; }

.intro-next-step { background: linear-gradient(145deg, rgba(185, 28, 28, 0.1), transparent 64%), var(--container-bg); }
.intro-next-step > p { color: var(--text-secondary); font-size: 0.72rem; line-height: 1.55; margin: -6px 0 13px; }
.intro-page-actions { display: grid; gap: 9px; }

.intro-page-action {
  display: grid;
  grid-template-columns: 24px 1fr 18px;
  align-items: center;
  gap: 8px;
  min-height: 58px;
  padding: 11px 13px;
  border-radius: 14px;
  text-align: left;
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.intro-page-action:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.intro-page-action > i:first-child { font-size: 1.05rem; }
.intro-page-action > i:last-child { justify-self: end; }
.intro-page-action span { display: flex; flex-direction: column; }
.intro-page-action strong { font-size: 0.75rem; line-height: 1.4; }
.intro-page-action small { font-size: 0.63rem; line-height: 1.4; margin-top: 2px; opacity: 0.8; }
.intro-page-action-primary { background: #b91c1c; color: #fff; }
.intro-page-action-secondary { background: var(--input-bg); border: 1px solid var(--border-color); color: var(--text-primary); }

@media (min-width: 560px) {
  .intro-page { padding-top: 18px; }
  .intro-hero { padding: 26px 25px 28px; }
  .intro-video-section,
  .intro-value-section,
  .intro-next-step { padding: 20px; }
  .intro-page-actions { grid-template-columns: 1fr 1fr; }
}