/* Re Hong Technology — lightweight responsive layout */

:root {
  --bg: #f8fafc;
  --surface: #ffffff;
  --text: #0f172a;
  --muted: #475569;
  --accent: #0c4a6e;
  --accent-soft: #e0f2fe;
  --border: #e2e8f0;
  --shadow: 0 10px 40px -12px rgba(15, 23, 42, 0.12);
  --radius: 12px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --max: 72rem;
  --header-h: 4.25rem;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .reveal {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

a:hover {
  text-decoration-thickness: 2px;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  z-index: 100;
  padding: 0.75rem 1rem;
  background: var(--accent);
  color: #fff;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(248, 250, 252, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0.65rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: var(--header-h);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: inherit;
  text-decoration: none;
  font-weight: 650;
  letter-spacing: -0.02em;
}

.brand img {
  flex-shrink: 0;
}

.brand-text {
  font-size: 0.95rem;
  line-height: 1.25;
}

.brand-text small {
  display: block;
  font-weight: 500;
  font-size: 0.75rem;
  color: var(--muted);
}

.nav-toggle {
  display: none;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.5rem 0.65rem;
  cursor: pointer;
  font: inherit;
  color: var(--text);
}

.nav-toggle-icon {
  display: block;
  width: 1.35rem;
  height: 2px;
  background: currentColor;
  box-shadow: 0 6px 0 currentColor, 0 -6px 0 currentColor;
}

.site-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.25rem;
  align-items: center;
}

.site-nav a {
  color: var(--text);
  text-decoration: none;
  font-size: 0.9375rem;
  font-weight: 500;
}

.site-nav a:hover {
  color: var(--accent);
}

@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease;
  }

  .site-nav.is-open {
    max-height: 22rem;
  }

  .site-nav ul {
    flex-direction: column;
    align-items: stretch;
    padding: 1rem 1.25rem 1.25rem;
    gap: 0;
  }

  .site-nav li {
    border-bottom: 1px solid var(--border);
  }

  .site-nav li:last-child {
    border-bottom: 0;
  }

  .site-nav a {
    display: block;
    padding: 0.65rem 0;
  }
}

main {
  overflow-x: hidden;
}

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.25rem;
}

.hero {
  padding: clamp(2.5rem, 6vw, 4.5rem) 0 clamp(2rem, 4vw, 3rem);
  background: linear-gradient(165deg, var(--accent-soft) 0%, var(--bg) 55%);
}

.hero-grid {
  display: grid;
  gap: 2rem;
  align-items: center;
}

@media (min-width: 900px) {
  .hero-grid {
    grid-template-columns: 1.15fr 1fr;
  }
}

.hero h1 {
  margin: 0 0 1rem;
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  line-height: 1.2;
  letter-spacing: -0.03em;
}

.lead {
  margin: 0 0 1.5rem;
  font-size: 1.125rem;
  color: var(--muted);
  max-width: 38ch;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.badge {
  display: inline-block;
  padding: 0.35rem 0.75rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--accent);
}

.hero-aside {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

.hero-aside h2 {
  margin: 0 0 0.75rem;
  font-size: 1rem;
  color: var(--muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.hero-aside ul {
  margin: 0;
  padding-left: 1.2rem;
  color: var(--text);
}

.hero-aside li {
  margin-bottom: 0.5rem;
}

.section {
  padding: clamp(2.5rem, 5vw, 4rem) 0;
}

.section.alt {
  background: var(--surface);
  border-block: 1px solid var(--border);
}

.section h2 {
  margin: 0 0 0.5rem;
  font-size: clamp(1.35rem, 2.5vw, 1.75rem);
  letter-spacing: -0.02em;
}

.section-intro {
  margin: 0 0 2rem;
  max-width: 62ch;
  color: var(--muted);
}

.grid-3 {
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 640px) {
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

.card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.35rem 1.5rem;
  height: 100%;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.section.alt .card {
  background: var(--surface);
}

.card:hover {
  border-color: #bae6fd;
  box-shadow: var(--shadow);
}

.card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.0625rem;
}

.card p {
  margin: 0;
  font-size: 0.98rem;
  color: var(--muted);
}

.grid-products {
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 640px) {
  .grid-products {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1100px) {
  .grid-products {
    grid-template-columns: repeat(4, 1fr);
  }
}

.product-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.product-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}

.product-card figure {
  margin: 0;
  aspect-ratio: 3 / 2;
  overflow: hidden;
  background: #e2e8f0;
}

.product-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-card figcaption {
  padding: 1rem 1.1rem 1.2rem;
}

.product-card h3 {
  margin: 0 0 0.35rem;
  font-size: 1rem;
}

.product-card p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--muted);
}

.split {
  display: grid;
  gap: 2rem;
  align-items: start;
}

@media (min-width: 800px) {
  .split {
    grid-template-columns: 1fr 1fr;
  }
}

.cta-strip {
  margin-top: 2.5rem;
  padding: 1.5rem 1.75rem;
  background: var(--accent);
  color: #fff;
  border-radius: var(--radius);
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
}

.cta-strip p {
  margin: 0;
  font-weight: 600;
}

.cta-strip a {
  color: #fff;
  font-weight: 600;
  text-decoration: none;
  padding: 0.6rem 1.1rem;
  border: 2px solid rgba(255, 255, 255, 0.85);
  border-radius: 8px;
  transition: background 0.2s ease;
}

.cta-strip a:hover {
  background: rgba(255, 255, 255, 0.12);
}

.contact-section {
  padding-bottom: 3rem;
}

.contact-grid {
  display: grid;
  gap: 2rem;
  align-items: start;
}

@media (min-width: 768px) {
  .contact-grid {
    grid-template-columns: minmax(0, 1fr) auto;
  }
}

.contact-actions {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.contact-actions a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1rem;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.9375rem;
}

.contact-actions a.secondary {
  background: var(--surface);
  color: var(--accent);
  border: 1px solid var(--border);
}

.contact-actions a:hover {
  filter: brightness(1.05);
}

.contact-verbatim {
  margin: 0;
  padding: 1.25rem 1.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 0.9375rem;
  line-height: 1.65;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  color: var(--text);
}

.site-footer-meta {
  padding: 2rem 0;
  border-top: 1px solid var(--border);
  font-size: 0.875rem;
  color: var(--muted);
}

.site-footer-meta .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  justify-content: space-between;
  align-items: center;
}

.site-footer-meta a {
  color: var(--muted);
}

.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.page-hero {
  padding: clamp(2rem, 4vw, 3rem) 0 1rem;
}

.page-hero h1 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.6rem, 3vw, 2rem);
}

.page-content {
  padding-bottom: 3rem;
}

.page-content .prose {
  max-width: 52ch;
}

.page-content h2 {
  margin: 2rem 0 0.75rem;
  font-size: 1.2rem;
}

.page-content p {
  margin: 0 0 1rem;
  color: var(--muted);
}