@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600&family=Noto+Sans+SC:wght@400;500;700&display=swap');

:root {
  --primary: #003d82;
  --primary-dark: #001e41;
  --accent: #ff6b35;
  --tech: #00d9ff;
  --structure: #718096;
  --surface: #041126;
  --surface-soft: #081d3e;
  --surface-card: rgba(3, 20, 44, 0.8);
  --line: rgba(0, 217, 255, 0.4);
  --text: #d6e3ff;
  --muted: #9fb2d7;
  --success: #10b981;
  --transition: 260ms cubic-bezier(0.22, 1, 0.36, 1);
  --radius-sm: 10px;
  --radius-md: 18px;
  --radius-lg: 32px;
  --container: min(1200px, 92vw);
  color-scheme: dark;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Noto Sans SC', 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: radial-gradient(circle at top right, rgba(0, 217, 255, 0.08), transparent 40%),
              repeating-linear-gradient(90deg, rgba(0, 217, 255, 0.04), rgba(0, 217, 255, 0.04) 1px, transparent 1px, transparent 120px),
              repeating-linear-gradient(0deg, rgba(0, 217, 255, 0.04), rgba(0, 217, 255, 0.04) 1px, transparent 1px, transparent 120px),
              linear-gradient(135deg, #010916, #031a36 60%, #021126);
  color: var(--text);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-md);
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

.container {
  width: var(--container);
  margin: 0 auto;
}

section {
  padding: clamp(3rem, 6vw, 5.5rem) 0;
}

h1, h2, h3, h4 {
  font-family: 'Space Grotesk', 'Noto Sans SC', sans-serif;
  color: #f5f8ff;
  letter-spacing: 0.02em;
}

h1 { font-size: clamp(2.6rem, 4.5vw, 4.2rem); line-height: 1.1; }
h2 { font-size: clamp(2rem, 3.5vw, 3.4rem); }
h3 { font-size: clamp(1.4rem, 2.2vw, 2.1rem); }

p { color: var(--muted); }

header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(18px);
  background: rgba(1, 9, 22, 0.92);
  border-bottom: 1px solid rgba(0, 217, 255, 0.2);
}

nav {
  width: var(--container);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1rem 0;
  color: var(--text);
}

.logo {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
  letter-spacing: 0.2em;
  font-size: 1.15rem;
}

.logo span:last-child {
  font-size: 0.72rem;
  opacity: 0.8;
}

.nav-menu {
  display: flex;
  gap: 1.3rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-size: 0.82rem;
}

.nav-menu a {
  color: rgba(214, 227, 255, 0.8);
  padding-bottom: 0.35rem;
  position: relative;
}

.nav-menu a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--tech), transparent);
  transform-origin: center;
  transform: scaleX(0);
  transition: var(--transition);
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
  transform: scaleX(1);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 0.3rem;
  border: none;
  background: none;
}

.menu-toggle span {
  width: 26px;
  height: 2px;
  background: var(--text);
}

.hero {
  min-height: 90vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 80% 20%, rgba(0, 217, 255, 0.18), transparent 45%);
  pointer-events: none;
}

.hero-grid {
  position: relative;
  z-index: 2;
  display: grid;
  gap: 2.8rem;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.hero-visual {
  position: relative;
  padding: 2rem;
  border-radius: var(--radius-lg);
  background: var(--surface-soft);
  border: 1px solid rgba(0, 217, 255, 0.25);
  box-shadow: 0 35px 70px rgba(0, 12, 36, 0.6);
}

.hero-visual img {
  height: 360px;
  object-fit: cover;
  border-radius: var(--radius-md);
}

.hero-visual .floating-card {
  position: absolute;
  left: 10%;
  bottom: -12%;
  width: min(320px, 80%);
  background: var(--surface-card);
  border: 1px solid rgba(0, 217, 255, 0.3);
  padding: 1.4rem;
  border-radius: var(--radius-md);
  backdrop-filter: blur(18px);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
  border: 1px solid rgba(0, 217, 255, 0.4);
  font-size: 0.72rem;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--tech);
}

.tag.light {
  color: var(--text);
  border-color: rgba(255, 255, 255, 0.35);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.8rem;
  border-radius: 999px;
  font-weight: 600;
  letter-spacing: 0.05em;
  border: none;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
}

.btn-primary {
  background: linear-gradient(120deg, var(--primary), var(--accent));
  color: #fff;
  box-shadow: 0 20px 45px rgba(0, 61, 130, 0.4);
}

.btn-outline {
  border: 1px solid rgba(0, 217, 255, 0.4);
  color: var(--tech);
  background: transparent;
}

.btn-ghost {
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
}

.btn:hover { transform: translateY(-3px); }

.grid { display: grid; gap: 1.5rem; }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }

.section-title {
  max-width: 760px;
  margin-bottom: 2.5rem;
}

.section-title p { color: var(--muted); }

.card,
.blueprint-card {
  background: var(--surface-card);
  border-radius: var(--radius-md);
  border: 1px solid rgba(0, 217, 255, 0.2);
  padding: 1.8rem;
  box-shadow: 0 25px 45px rgba(1, 11, 29, 0.55);
  position: relative;
  overflow: hidden;
}

.card::after,
.blueprint-card::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  border: 1px solid rgba(255, 255, 255, 0.04);
  pointer-events: none;
}

.card:hover,
.blueprint-card:hover {
  transform: translateY(-6px);
  border-color: rgba(0, 217, 255, 0.5);
}

.section-muted {
  background: rgba(255, 255, 255, 0.015);
  border-top: 1px solid rgba(0, 217, 255, 0.08);
  border-bottom: 1px solid rgba(0, 217, 255, 0.08);
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1rem;
}

.stat {
  padding: 1rem 1.3rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(0, 217, 255, 0.2);
  background: rgba(0, 33, 74, 0.5);
}

.stat strong {
  font-size: 2.3rem;
  color: #fff;
  display: block;
}

.process-track {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1.5rem;
}

.process-step {
  flex: 1;
  min-width: 160px;
  padding: 1rem 1.2rem;
  border-radius: var(--radius-sm);
  border: 1px dashed rgba(0, 217, 255, 0.3);
  background: rgba(3, 22, 52, 0.8);
}

.process-step strong {
  color: var(--tech);
  letter-spacing: 0.2em;
  font-size: 0.85rem;
}

.case-filter,
.filter-group,
.tab-nav {
  display: flex;
  gap: 0.8rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}

.case-filter button,
.filter-group button,
.tab-nav button {
  border-radius: 999px;
  border: 1px solid rgba(0, 217, 255, 0.3);
  background: rgba(4, 25, 57, 0.7);
  color: var(--muted);
  padding: 0.6rem 1.4rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  cursor: pointer;
}

.case-filter button.active,
.filter-group button.active,
.tab-nav button.active {
  background: var(--accent);
  border-color: transparent;
  color: #fff;
}

.tab-content { display: none; }
.tab-content.active { display: block; }

.case-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.case-card {
  background: var(--surface-card);
  border-radius: var(--radius-md);
  border: 1px solid rgba(0, 217, 255, 0.12);
  padding: 1.2rem;
  display: grid;
  gap: 0.8rem;
  box-shadow: 0 20px 40px rgba(1, 8, 24, 0.6);
}

.case-card img {
  height: 220px;
  object-fit: cover;
  border-radius: var(--radius-md);
}

.case-card .meta {
  font-size: 0.85rem;
  letter-spacing: 0.2em;
  color: var(--accent);
}

.case-card .stacked-info {
  display: flex;
  justify-content: space-between;
  font-size: 0.9rem;
  border-top: 1px dashed rgba(255, 255, 255, 0.1);
  padding-top: 0.8rem;
}

.bim-viewer {
  background: linear-gradient(120deg, rgba(0, 61, 130, 0.7), rgba(2, 22, 48, 0.9));
  border-radius: var(--radius-lg);
  padding: clamp(2rem, 4vw, 3rem);
  border: 1px solid rgba(0, 217, 255, 0.25);
  box-shadow: 0 30px 55px rgba(0, 6, 20, 0.75);
}

.bim-viewport {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid rgba(0, 217, 255, 0.3);
}

.bim-viewport img {
  height: 320px;
  object-fit: cover;
}

.highlight-card {
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-md);
  padding: 1.2rem 1.5rem;
  border: 1px solid rgba(0, 217, 255, 0.2);
}

.timeline {
  border-left: 2px solid rgba(0, 217, 255, 0.3);
  padding-left: 1.8rem;
  display: grid;
  gap: 1.2rem;
}

.timeline-item {
  position: relative;
}

.timeline-item::before {
  content: '';
  position: absolute;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  left: -1.95rem;
  top: 0.3rem;
  background: var(--accent);
  border: 2px solid var(--surface);
  box-shadow: 0 0 0 6px rgba(255, 107, 53, 0.2);
}

.cert-wall {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1rem;
}

.cert-card {
  background: rgba(4, 24, 55, 0.9);
  border-radius: var(--radius-md);
  border: 1px dashed rgba(0, 217, 255, 0.25);
  text-align: center;
  padding: 1rem;
}

.cert-card img {
  height: 80px;
  object-fit: contain;
}

.partner-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1rem;
}

.partner-card {
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.12);
  padding: 1.2rem;
  text-align: center;
  background: rgba(255, 255, 255, 0.02);
}

.partner-card img {
  height: 50px;
  object-fit: contain;
  margin: 0 auto 0.8rem;
}

.news-track {
  display: grid;
  gap: 1rem;
}

.news-card {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 1.3rem;
  background: rgba(3, 19, 41, 0.9);
  border-radius: var(--radius-md);
  border: 1px solid rgba(0, 217, 255, 0.18);
  padding: 1.2rem;
}

.news-card img {
  height: 140px;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

.metric-board {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
}

.metric-card {
  border-radius: var(--radius-md);
  border: 1px solid rgba(0, 217, 255, 0.2);
  padding: 1.4rem;
  background: rgba(2, 19, 40, 0.85);
  box-shadow: inset 0 0 40px rgba(0, 61, 130, 0.25);
}

.metric-card strong {
  font-size: 2.4rem;
  color: var(--tech);
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.form {
  display: grid;
  gap: 1rem;
}

.form input,
.form textarea,
.form select {
  width: 100%;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(0, 217, 255, 0.35);
  background: rgba(2, 15, 36, 0.85);
  color: #fff;
  padding: 0.85rem 1rem;
}

.form textarea { min-height: 150px; resize: vertical; }

.page-shell { min-height: 100vh; padding-bottom: 4rem; }

.page-hero {
  position: relative;
  padding: clamp(4rem, 8vw, 6rem) 0;
  background-size: cover;
  background-position: center;
  color: #fff;
}

.page-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(0, 8, 22, 0.85), rgba(0, 61, 130, 0.65));
}

.page-hero .container {
  position: relative;
  z-index: 2;
}

.breadcrumb {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  font-size: 0.9rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(214, 227, 255, 0.6);
}

.responsive-table {
  width: 100%;
  border-collapse: collapse;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid rgba(0, 217, 255, 0.2);
}

.responsive-table th,
.responsive-table td {
  padding: 1rem 1.2rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.responsive-table th {
  background: rgba(0, 33, 74, 0.8);
  color: #fff;
  font-weight: 600;
}

.download-card {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--radius-md);
  padding: 1.2rem 1.4rem;
  border: 1px solid rgba(0, 217, 255, 0.2);
}

.article {
  max-width: 920px;
  margin: 0 auto;
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--radius-lg);
  padding: clamp(1.5rem, 4vw, 3rem);
  border: 1px solid rgba(0, 217, 255, 0.2);
  display: grid;
  gap: 1rem;
}

footer {
  background: #010916;
  border-top: 1px solid rgba(0, 217, 255, 0.2);
  margin-top: 4rem;
}

.footer-grid {
  width: var(--container);
  margin: 0 auto;
  padding: clamp(2rem, 6vw, 3.5rem) 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
}

.footer-bottom {
  text-align: center;
  padding: 1rem 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  color: rgba(214, 227, 255, 0.7);
}

.fade-target {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-target.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 980px) {
  .nav-menu {
    position: fixed;
    top: 70px;
    right: 1.2rem;
    flex-direction: column;
    padding: 1.3rem;
    border-radius: var(--radius-md);
    background: rgba(1, 9, 22, 0.96);
    border: 1px solid rgba(0, 217, 255, 0.2);
    transform: translateY(-10px);
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
  }

  .nav-menu.active {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  .menu-toggle { display: flex; }
  .news-card { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  nav { flex-wrap: wrap; }
  .download-card { flex-direction: column; align-items: flex-start; gap: 0.6rem; }
  .hero-visual img { height: 280px; }
}