html {
  scroll-behavior: smooth;
}

body {
  font-family: "Noto Sans SC", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #f3f4f6;
  color: #1f2933;
}

.site-shell {
  background:
    linear-gradient(180deg, rgba(17, 24, 39, 0.02), rgba(17, 24, 39, 0.06)),
    #f5f6f8;
}

.nav-link {
  color: #e5e7eb;
  transition: color .2s ease, background .2s ease;
}

.nav-link:hover {
  color: #ff9900;
  background: rgba(255, 255, 255, .08);
}

.sale-frame {
  border: 1px solid #cfd4dc;
  box-shadow: 0 14px 34px rgba(15, 23, 42, .08);
}

.dark-panel {
  background: #262a31;
  color: #f9fafb;
  border: 1px solid #3b4049;
}

.orange-cta {
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, #ffb13b, #ff9900 45%, #e97800);
  color: #111827;
  box-shadow: 0 12px 22px rgba(255, 153, 0, .32), inset 0 1px 0 rgba(255, 255, 255, .55);
}

.orange-cta::after {
  content: "";
  position: absolute;
  inset: -60% auto -60% -30%;
  width: 44%;
  transform: rotate(18deg);
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, .75), transparent);
  animation: cta-shine 2.8s linear infinite;
}

.orange-cta > span {
  position: relative;
  z-index: 1;
}

@keyframes cta-shine {
  0% { left: -45%; }
  55%, 100% { left: 125%; }
}

.hero-bg {
  background-image:
    linear-gradient(90deg, rgba(0, 0, 0, .82), rgba(0, 0, 0, .52), rgba(0, 0, 0, .18)),
    var(--hero-image);
  background-size: cover;
  background-position: center;
}

.feature-card,
.review-card,
.guide-card,
.download-card {
  transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease;
}

.feature-card:hover,
.review-card:hover,
.guide-card:hover,
.download-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 32px rgba(15, 23, 42, .12);
  border-color: #ff9900;
}

.gallery-image {
  transition: transform .25s ease, filter .25s ease;
}

.gallery-button:hover .gallery-image {
  transform: scale(1.04);
  filter: saturate(1.08) contrast(1.05);
}

.accordion-body {
  display: none;
}

.accordion-item.is-open .accordion-body {
  display: block;
}

.accordion-item.is-open .accordion-icon::before {
  content: "-";
}

.accordion-icon::before {
  content: "+";
}

.lightbox,
.modal {
  opacity: 0;
  pointer-events: none;
  transition: opacity .18s ease;
}

.lightbox.is-open,
.modal.is-open {
  opacity: 1;
  pointer-events: auto;
}

.lightbox img {
  max-width: min(92vw, 1180px);
  max-height: 82vh;
}

.timeline-line {
  background: linear-gradient(180deg, #dc2626, #ff9900);
}

.tab-button[aria-selected="true"] {
  background: #111827;
  color: #ff9900;
  border-color: #ff9900;
}

@media (max-width: 767px) {
  .mobile-menu {
    display: none;
  }

  .mobile-menu.is-open {
    display: grid;
  }
}