/* ==========================================================================
   VMSTECH PRO - ENGINEERING SAAS DESIGN SYSTEM
   Inspired by VinaCAD Enterprise Engineering Interface
   ========================================================================== */

:root {
  /* Brand Engineering Palette */
  --color-green-primary: #00875A;   /* VinaCAD Signature Green */
  --color-green-dark: #006644;
  --color-green-light: #10B981;
  --color-green-mint: #ECFDF5;
  --color-green-surface: #F0FDF4;

  --color-blue-primary: #2563EB;    /* GIS & Engineering Blue */
  --color-blue-dark: #1D4ED8;
  --color-blue-light: #3B82F6;
  --color-blue-surface: #EFF6FF;

  /* Neutrals */
  --bg-white: #FFFFFF;
  --bg-slate-50: #F8FAFC;
  --bg-slate-100: #F1F5F9;
  --border-slate: #E2E8F0;
  --border-divider: #CBD5E1;

  --text-dark: #0F172A;
  --text-title: #0F172A;
  --text-body: #334155;
  --text-muted: #64748B;
  --text-green: #00875A;

  /* Typography */
  --font-main: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.06), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
  --shadow-float: 0 8px 24px rgba(0, 0, 0, 0.12);

  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 12px;
  --radius-full: 9999px;
  --transition: all 0.2s ease-in-out;
  --container-width: 1240px;
}

/* Reset & Defaults */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-white);
  color: var(--text-body);
  font-family: var(--font-main);
  font-size: 15px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ==========================================================================
   TOP BAR (Utility Bar)
   ========================================================================== */
.site-topbar {
  background-color: #FFFFFF;
  border-bottom: 1px solid #E5E7EB;
  font-size: 13px;
  height: 38px;
  display: flex;
  align-items: center;
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.lang-switcher {
  display: flex;
  align-items: center;
  gap: 6px;
  color: #374151;
  font-weight: 500;
  cursor: pointer;
}

.flag-icon {
  font-size: 16px;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 16px;
  color: #4B5563;
}

.topbar-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: #374151;
  font-weight: 500;
}

.topbar-link:hover {
  color: var(--color-green-primary);
}

.topbar-label {
  color: #6B7280;
}

.topbar-divider {
  color: #D1D5DB;
}

/* ==========================================================================
   MAIN HEADER & NAV
   ========================================================================== */
.site-header {
  background-color: #FFFFFF;
  border-bottom: 1px solid #E5E7EB;
  position: sticky;
  top: 0;
  z-index: 1000;
  height: 76px;
  display: flex;
  align-items: center;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-logo .logo-link {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-brand-wrap {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.brand-vms {
  color: #0F172A;
}

.brand-cad {
  color: var(--color-green-primary);
}

.brand-sub {
  font-size: 8px;
  font-weight: 700;
  color: #64748B;
  letter-spacing: 1.5px;
  font-family: var(--font-mono);
}

.site-header .container {
  max-width: 1380px;
}

.site-navigation {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1 1 auto;
}

.nav-links {
  display: flex;
  align-items: center;
  justify-content: center;
  list-style: none;
  gap: 8px;
  flex-wrap: nowrap;
  margin: 0;
  padding: 0;
}

.nav-links li {
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
  flex-shrink: 0;
}

.nav-links li a {
  color: #1F2937;
  font-weight: 600;
  font-size: 14.5px;
  padding: 6px 5px;
  display: inline-flex;
  align-items: center;
  gap: 3px;
  white-space: nowrap;
  transition: color 0.15s ease;
  text-decoration: none;
}

.nav-links li a:hover {
  color: var(--color-green-primary);
}

.nav-separator {
  color: #D1D5DB;
  font-size: 12px;
  margin: 0 2px;
  user-select: none;
}

.header-cta {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.btn-outline-download {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 16px;
  border: 1.5px solid var(--color-green-primary);
  color: var(--color-green-primary);
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 14px;
  background-color: #FFFFFF;
  white-space: nowrap;
  flex-shrink: 0;
  transition: all 0.2s ease;
  text-decoration: none;
}

.btn-outline-download:hover {
  background-color: var(--color-green-surface);
  color: var(--color-green-dark);
  border-color: var(--color-green-dark);
}

.btn-primary-green {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 9px 18px;
  background: linear-gradient(135deg, #00875A 0%, #006B46 100%);
  color: #FFFFFF !important;
  border-radius: var(--radius-md);
  font-weight: 700;
  font-size: 14px;
  border: 1.5px solid #00875A;
  box-shadow: 0 2px 8px rgba(0, 135, 90, 0.25);
  white-space: nowrap;
  flex-shrink: 0;
  transition: all 0.2s ease;
  text-decoration: none;
}

.btn-primary-green:hover {
  background: linear-gradient(135deg, #009E69 0%, #007A50 100%);
  border-color: #007A50;
  box-shadow: 0 4px 14px rgba(0, 135, 90, 0.4);
  transform: translateY(-1px);
  color: #FFFFFF !important;
}

.mobile-nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-dark);
  font-size: 24px;
  cursor: pointer;
}

/* ==========================================================================
   HERO SECTION (Image 1 Reference)
   ========================================================================== */
.hero-cad-section {
  position: relative;
  padding: 70px 0 80px;
  background: linear-gradient(135deg, #F8FAFC 0%, #FFFFFF 50%, #F0FDF4 100%);
  overflow: hidden;
  border-bottom: 1px solid #E5E7EB;
}

/* Flowing red ribbon accent in background */
.hero-flag-accent {
  position: absolute;
  top: 0;
  right: 0;
  width: 55%;
  height: 100%;
  pointer-events: none;
  opacity: 0.15;
  background: radial-gradient(circle at 80% 30%, #EF4444 0%, transparent 60%);
  z-index: 1;
}

.hero-layout {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 40px;
  align-items: center;
  position: relative;
  z-index: 2;
}

.hero-left {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.hero-brand-emblem {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 20px;
}

.hero-cube-logo {
  display: flex;
  align-items: center;
  gap: 8px;
}

.cube-title {
  font-size: 19px;
  font-weight: 800;
  color: #0F172A;
}

.make-in-vietnam-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(90deg, #DC2626 0%, #B91C1C 100%);
  color: #FFFFFF;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  box-shadow: 0 2px 6px rgba(220, 38, 38, 0.3);
  border: 1px solid #FCA5A5;
}

.hero-main-title {
  font-size: 44px;
  font-weight: 800;
  line-height: 1.2;
  color: #0F172A;
  margin-bottom: 18px;
}

.hero-workflow-arrow {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-green-primary);
  margin-bottom: 18px;
  line-height: 1.5;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.hero-workflow-arrow span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.workflow-sep {
  color: #10B981;
}

.hero-subtitle {
  font-size: 16.5px;
  color: #4B5563;
  line-height: 1.65;
  margin-bottom: 32px;
  max-width: 580px;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 16px;
}

.btn-hero-solid {
  padding: 13px 26px;
  background-color: var(--color-green-primary);
  color: #FFFFFF;
  border-radius: var(--radius-md);
  font-weight: 700;
  font-size: 15px;
  box-shadow: 0 4px 12px rgba(0, 135, 90, 0.25);
}

.btn-hero-solid:hover {
  background-color: var(--color-green-dark);
  color: #FFFFFF;
  transform: translateY(-2px);
}

.btn-hero-outline {
  padding: 13px 24px;
  background-color: #FFFFFF;
  border: 1.5px solid var(--color-green-primary);
  color: var(--color-green-primary);
  border-radius: var(--radius-md);
  font-weight: 700;
  font-size: 15px;
}

.btn-hero-outline:hover {
  background-color: var(--color-green-surface);
  transform: translateY(-2px);
}

/* Hero Right Showcase Mockup */
.hero-right-showcase {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.cad-tablet-mockup {
  width: 100%;
  max-width: 520px;
  background: #0F172A;
  border: 8px solid #1E293B;
  border-radius: 20px;
  box-shadow: var(--shadow-float);
  overflow: hidden;
  position: relative;
}

.tablet-camera-notch {
  width: 8px;
  height: 8px;
  background: #334155;
  border-radius: 50%;
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
}

.tablet-viewport {
  height: 320px;
  background: radial-gradient(circle at 50% 50%, #1E293B 0%, #090E17 100%);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.cad-3d-wireframe {
  position: absolute;
  width: 100%;
  height: 100%;
}

.tablet-hud-info {
  position: absolute;
  bottom: 12px;
  left: 14px;
  right: 14px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 11px;
  font-family: var(--font-mono);
  color: #94A3B8;
  background: rgba(15, 23, 42, 0.7);
  padding: 6px 12px;
  border-radius: 6px;
  backdrop-filter: blur(4px);
}

/* Layered panels behind tablet */
.showcase-panels-wrap {
  position: absolute;
  right: -20px;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  gap: 12px;
  z-index: -1;
  opacity: 0.85;
}

.panel-slice {
  width: 70px;
  height: 360px;
  background: linear-gradient(180deg, #1E3A8A 0%, #064E3B 100%);
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: var(--shadow-md);
  opacity: 0.75;
}

/* ==========================================================================
   STATS & TRUST SECTION (Image 2 Reference - Chamfered Cards)
   ========================================================================== */
.trust-stats-section {
  padding: 80px 0;
  background-color: #FFFFFF;
  text-align: center;
}

.trust-section-title {
  font-size: 32px;
  font-weight: 800;
  color: var(--color-green-primary);
  margin-bottom: 14px;
}

.trust-section-desc {
  font-size: 16px;
  color: #4B5563;
  max-width: 760px;
  margin: 0 auto 50px;
  line-height: 1.6;
}

.chamfered-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

/* Chamfered Box with Two-tone Gradient Border */
.chamfered-card {
  position: relative;
  background: #FFFFFF;
  padding: 34px 24px;
  text-align: left;
  border-radius: 16px;
  /* Diagonal cut at top-right and bottom-left */
  border-top-right-radius: 36px;
  border-bottom-left-radius: 36px;
  border: 2px solid transparent;
  background-image: linear-gradient(#FFFFFF, #FFFFFF), linear-gradient(135deg, #10B981 0%, #2563EB 100%);
  background-origin: border-box;
  background-clip: padding-box, border-box;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
  transition: var(--transition);
}

.chamfered-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 24px rgba(16, 185, 129, 0.12);
}

.chamfered-num {
  font-size: 38px;
  font-weight: 800;
  color: var(--color-green-primary);
  line-height: 1.1;
  margin-bottom: 8px;
  font-family: var(--font-main);
}

.chamfered-label {
  font-size: 15px;
  color: #374151;
  font-weight: 600;
  line-height: 1.4;
}

/* ==========================================================================
   BANNER STRIP (Mint Green Accent)
   ========================================================================== */
.mint-accent-banner {
  background-color: var(--color-green-surface);
  border-top: 1px solid #D1FAE5;
  border-bottom: 1px solid #D1FAE5;
  padding: 44px 0;
  text-align: center;
}

.mint-banner-text {
  font-size: 26px;
  font-weight: 800;
  color: var(--color-green-primary);
  line-height: 1.4;
  max-width: 900px;
  margin: 0 auto;
}

/* ==========================================================================
   FEATURE BREAKDOWN (Image 3 Reference)
   ========================================================================== */
.features-deepdive-section {
  padding: 90px 0;
  background-color: #FFFFFF;
}

.features-main-heading {
  text-align: center;
  font-size: 34px;
  font-weight: 800;
  color: var(--color-green-primary);
  margin-bottom: 60px;
}

.feature-dual-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  margin-bottom: 80px;
}

.feature-dual-row:last-child {
  margin-bottom: 0;
}

.feature-dual-row.reverse {
  direction: rtl;
}

.feature-dual-row.reverse > * {
  direction: ltr;
}

/* Mockup Display Box */
.monitor-screen-frame {
  background: #0F172A;
  border-radius: 12px;
  border: 1px solid #334155;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.monitor-top-toolbar {
  background: #1E293B;
  padding: 8px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid #334155;
}

.toolbar-dots {
  display: flex;
  gap: 6px;
}

.t-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
}

.t-dot.red { background: #EF4444; }
.t-dot.yellow { background: #F59E0B; }
.t-dot.green { background: #10B981; }

.toolbar-title {
  color: #94A3B8;
  font-size: 11.5px;
  font-family: var(--font-mono);
}

.monitor-canvas-area {
  height: 280px;
  background: #020617;
  position: relative;
  overflow: hidden;
}

.feature-content-side h3 {
  font-size: 28px;
  font-weight: 800;
  color: #0F172A;
  margin-bottom: 16px;
}

.feature-icon-badge {
  width: 44px;
  height: 44px;
  border-radius: 8px;
  background: var(--color-green-surface);
  color: var(--color-green-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 16px;
}

.feature-lead-text {
  font-size: 15.5px;
  color: #4B5563;
  line-height: 1.7;
  margin-bottom: 18px;
}

.feature-specs-checklist {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.feature-specs-checklist li {
  position: relative;
  padding-left: 20px;
  font-size: 14.5px;
  color: #1F2937;
  font-weight: 600;
}

.feature-specs-checklist li::before {
  content: '•';
  position: absolute;
  left: 4px;
  color: var(--color-green-primary);
  font-size: 18px;
  line-height: 1;
}

/* ==========================================================================
   PRODUCTS CATALOG GRID
   ========================================================================== */
.commercial-products-section {
  padding: 80px 0;
  background-color: var(--bg-slate-50);
  border-top: 1px solid #E5E7EB;
}

.product-cad-card {
  background: #FFFFFF;
  border: 1px solid #E5E7EB;
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.product-cad-card:hover {
  border-color: var(--color-green-primary);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.product-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.product-cad-title {
  font-size: 20px;
  font-weight: 700;
  color: #0F172A;
  margin-bottom: 8px;
}

.product-cad-sub {
  font-size: 13.5px;
  color: #64748B;
  margin-bottom: 16px;
  line-height: 1.4;
}

.product-cad-footer {
  margin-top: auto;
  padding-top: 18px;
  border-top: 1px solid #F1F5F9;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* ==========================================================================
   PAGE HEADER & BREADCRUMBS (Inner Pages)
   ========================================================================== */
.page-header {
  background: linear-gradient(135deg, #F8FAFC 0%, #FFFFFF 60%, #F0FDF4 100%);
  border-bottom: 1px solid #E5E7EB;
  padding: 56px 0 44px;
  text-align: center;
  position: relative;
}

.page-header.align-left {
  text-align: left;
}

.breadcrumbs {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  color: #64748B;
  margin-bottom: 16px;
  background: #FFFFFF;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  border: 1px solid #E2E8F0;
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}

.breadcrumbs a {
  color: #0F172A;
  font-weight: 500;
  text-decoration: none;
  transition: color 0.15s;
}

.breadcrumbs a:hover {
  color: var(--color-green-primary);
}

.breadcrumbs span {
  color: var(--color-green-primary);
  font-weight: 600;
}

.page-title {
  font-size: 38px;
  font-weight: 800;
  color: #0F172A;
  line-height: 1.25;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.page-desc {
  color: #475569;
  font-size: 16.5px;
  line-height: 1.65;
  max-width: 680px;
  margin: 0 auto;
}

/* ==========================================================================
   COMMON COMPONENTS (Badges, Buttons, Tabs)
   ========================================================================== */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  background-color: #ECFDF5;
  color: #047857;
  border: 1px solid #A7F3D0;
}

.badge.demo {
  background-color: #FFFBEB;
  color: #B45309;
  border-color: #FDE68A;
}

.badge.blue {
  background-color: #EFF6FF;
  color: #1D4ED8;
  border-color: #BFDBFE;
}

.badge.gray {
  background-color: #F1F5F9;
  color: #475569;
  border-color: #CBD5E1;
}

/* Generic Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  font-size: 14.5px;
  font-weight: 600;
  border-radius: var(--radius-md);
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
  border: 1.5px solid transparent;
}

.btn-primary {
  background: linear-gradient(135deg, #00875A 0%, #006B46 100%);
  color: #FFFFFF !important;
  border-color: #00875A;
  box-shadow: 0 2px 6px rgba(0, 135, 90, 0.2);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #009E69 0%, #007A50 100%);
  border-color: #007A50;
  box-shadow: 0 4px 12px rgba(0, 135, 90, 0.35);
  transform: translateY(-1px);
}

.btn-outline {
  background-color: #FFFFFF;
  color: #0F172A;
  border-color: #D1D5DB;
}

.btn-outline:hover {
  border-color: var(--color-green-primary);
  color: var(--color-green-primary);
  background-color: #F0FDF4;
}

.btn-sm {
  padding: 6px 14px;
  font-size: 13px;
}

.btn-block {
  width: 100%;
}

/* Filter Tabs */
.filter-tabs {
  display: flex;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 28px;
}

.filter-btn {
  padding: 7px 16px;
  font-size: 13.5px;
  font-weight: 600;
  border-radius: var(--radius-full);
  background: #FFFFFF;
  border: 1px solid #D1D5DB;
  color: #4B5563;
  cursor: pointer;
  transition: all 0.2s ease;
}

.filter-btn:hover {
  border-color: var(--color-green-primary);
  color: var(--color-green-primary);
  background: #F0FDF4;
}

.filter-btn.active {
  background: var(--color-green-primary);
  border-color: var(--color-green-primary);
  color: #FFFFFF;
  box-shadow: 0 2px 6px rgba(0, 135, 90, 0.25);
}

/* ==========================================================================
   PRODUCTS CATALOG & CARDS (page-san-pham.php)
   ========================================================================== */
.products-section {
  padding: 60px 0 90px;
  background-color: #F8FAFC;
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.product-card {
  background: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
  display: flex;
  flex-direction: column;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 24px -6px rgba(15, 23, 42, 0.08), 0 4px 8px -2px rgba(15, 23, 42, 0.04);
  border-color: #CBD5E1;
}

.product-thumb {
  background: linear-gradient(135deg, #F1F5F9 0%, #E2E8F0 100%);
  height: 160px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid #E2E8F0;
}

.product-thumb-icon {
  font-size: 52px;
  filter: drop-shadow(0 4px 6px rgba(0,0,0,0.08));
}

.product-badges {
  position: absolute;
  top: 12px;
  right: 12px;
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.product-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.product-cat-tag {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-green-primary);
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}

.product-title {
  font-size: 19px;
  font-weight: 700;
  color: #0F172A;
  line-height: 1.35;
  margin-bottom: 6px;
}

.product-title a {
  color: inherit;
  text-decoration: none;
}

.product-title a:hover {
  color: var(--color-green-primary);
}

.product-subtitle {
  font-size: 13.5px;
  color: #64748B;
  margin-bottom: 14px;
  line-height: 1.45;
}

.product-excerpt {
  font-size: 14px;
  color: #475569;
  line-height: 1.65;
  margin-bottom: 16px;
  flex-grow: 1;
}

.product-features-preview {
  background: #F8FAFC;
  border: 1px solid #F1F5F9;
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  font-size: 12.5px;
  color: #475569;
  line-height: 1.5;
  margin-bottom: 20px;
}

.product-footer {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid #F1F5F9;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.product-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13.5px;
  font-weight: 700;
  color: var(--color-green-primary);
  text-decoration: none;
  transition: gap 0.15s;
}

.product-link:hover {
  gap: 9px;
  color: var(--color-green-dark);
}

/* ==========================================================================
   SOLUTIONS LAYOUT (page-giai-phap.php)
   ========================================================================== */
.solutions-list {
  display: flex;
  flex-direction: column;
  gap: 36px;
}

.solution-card-row {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 40px;
  background: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: var(--radius-lg);
  padding: 40px;
  align-items: center;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
  transition: all 0.25s ease;
}

.solution-card-row.reverse {
  grid-template-columns: 1fr 1.2fr;
}

.solution-card-row:hover {
  box-shadow: 0 10px 25px -5px rgba(0,0,0,0.08);
  border-color: #CBD5E1;
}

.solution-title {
  font-size: 25px;
  font-weight: 800;
  color: #0F172A;
  margin-bottom: 14px;
  line-height: 1.3;
}

.solution-desc {
  font-size: 15.5px;
  color: #475569;
  line-height: 1.75;
  margin-bottom: 20px;
}

.solution-benefits {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 0;
  margin: 0;
}

.solution-benefits li {
  position: relative;
  padding-left: 26px;
  font-size: 14.5px;
  color: #334155;
  line-height: 1.55;
}

.solution-benefits li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--color-green-primary);
  font-weight: 800;
  font-size: 15px;
}

.solution-feature-box {
  background: linear-gradient(135deg, #F8FAFC 0%, #F1F5F9 100%);
  border: 1px solid #E2E8F0;
  border-radius: var(--radius-md);
  padding: 36px 24px;
  text-align: center;
}

.solution-box-icon {
  font-size: 50px;
  margin-bottom: 14px;
}

.solution-box-title {
  font-size: 18px;
  font-weight: 700;
  color: #0F172A;
  margin-bottom: 8px;
}

.solution-box-meta {
  font-size: 13.5px;
  color: #64748B;
  font-family: var(--font-mono);
}

/* ==========================================================================
   ABOUT PAGE (page-gioi-thieu.php)
   ========================================================================== */
.about-intro-grid {
  display: grid;
  grid-template-columns: 1.25fr 1fr;
  gap: 48px;
  align-items: center;
  margin-bottom: 70px;
}

.about-values-card {
  background: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05);
}

.pillars-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 50px;
}

.pillar-card {
  background: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: var(--radius-lg);
  padding: 30px 24px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
  transition: all 0.2s ease;
}

.pillar-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 20px -5px rgba(0,0,0,0.08);
  border-color: #CBD5E1;
}

.pillar-icon {
  font-size: 40px;
  margin-bottom: 14px;
}

.pillar-title {
  font-size: 18px;
  font-weight: 700;
  color: #0F172A;
  margin-bottom: 10px;
}

.pillar-desc {
  font-size: 14px;
  color: #64748B;
  line-height: 1.6;
}

/* ==========================================================================
   CONTACT PAGE (page-lien-he.php)
   ========================================================================== */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.25fr;
  gap: 44px;
  align-items: flex-start;
}

.contact-info-card {
  background: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.contact-methods {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 30px;
}

.contact-method-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.contact-method-icon {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: #ECFDF5;
  color: var(--color-green-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
  border: 1px solid #A7F3D0;
}

.contact-form-wrapper {
  background: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: var(--radius-lg);
  padding: 38px;
  box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin-bottom: 18px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 7px;
  margin-bottom: 18px;
}

.form-group label {
  font-size: 13.5px;
  font-weight: 600;
  color: #1E293B;
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: 11px 14px;
  border: 1.5px solid #CBD5E1;
  border-radius: var(--radius-sm);
  font-size: 14.5px;
  font-family: inherit;
  color: #0F172A;
  background: #FFFFFF;
  transition: all 0.2s ease;
  width: 100%;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-green-primary);
  box-shadow: 0 0 0 3px rgba(0, 135, 90, 0.12);
}

.form-group textarea {
  min-height: 110px;
  resize: vertical;
}

.form-status {
  margin-top: 16px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  display: none;
}

.form-status.success {
  background-color: #ECFDF5;
  color: #065F46;
  border: 1px solid #A7F3D0;
  display: block;
}

.form-status.error {
  background-color: #FEF2F2;
  color: #991B1B;
  border: 1px solid #FECACA;
  display: block;
}

/* ==========================================================================
   SINGLE PRODUCT (single-vmstech_product.php)
   ========================================================================== */
.single-product-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 36px;
  align-items: flex-start;
}

.single-product-main {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.single-block-card {
  background: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: var(--radius-lg);
  padding: 34px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.single-block-title {
  font-size: 21px;
  font-weight: 700;
  color: #0F172A;
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.single-product-sidebar {
  background: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: var(--radius-lg);
  padding: 30px;
  position: sticky;
  top: 96px;
  box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05);
}

/* ==========================================================================
   FLOATING ACTION DOCK (VinaCAD Style on Right Side)
   ========================================================================== */
.floating-action-dock {
  position: fixed;
  right: 24px;
  bottom: 30px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  z-index: 999;
}

.dock-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
}

.dock-btn:hover {
  transform: scale(1.08);
}

.dock-feedback {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background-color: #334155;
  color: #FFFFFF;
}

.dock-download {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background-color: var(--color-green-primary);
  color: #FFFFFF;
}

.dock-totop {
  width: 44px;
  height: 44px;
  border-radius: 8px;
  background-color: #10B981;
  color: #FFFFFF;
}

/* ==========================================================================
   FOOTER (VinaCAD Clean Slate)
   ========================================================================== */
.site-footer {
  background-color: #0F172A;
  color: #94A3B8;
  padding: 70px 0 30px;
  border-top: 1px solid #1E293B;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  margin-bottom: 50px;
}

.footer-col h4 {
  color: #FFFFFF;
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 18px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  color: #94A3B8;
  font-size: 14px;
}

.footer-links a:hover {
  color: #10B981;
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid #1E293B;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
}

@media (max-width: 1280px) {
  .site-header .container {
    padding: 0 16px;
  }
  .nav-links {
    gap: 4px;
  }
  .nav-links li a {
    font-size: 13.5px;
    padding: 5px 3px;
  }
  .btn-outline-download,
  .btn-primary-green {
    padding: 8px 12px;
    font-size: 13px;
  }
}

@media (max-width: 1140px) {
  .site-logo .brand-name {
    font-size: 20px;
  }
  .nav-links {
    gap: 2px;
  }
  .nav-links li a {
    font-size: 12.5px;
    padding: 4px 2px;
  }
  .btn-outline-download {
    padding: 7px 10px;
    font-size: 12px;
  }
  .btn-primary-green {
    padding: 7px 12px;
    font-size: 12px;
  }
}

@media (max-width: 1024px) {
  .site-topbar { display: none; }
  .nav-links {
    display: none;
    position: fixed;
    top: 76px;
    left: 0;
    width: 100%;
    background: #FFFFFF;
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    border-bottom: 1px solid #E5E7EB;
    box-shadow: var(--shadow-lg);
    z-index: 1000;
  }
  .nav-links.active {
    display: flex;
  }
  .nav-links .nav-separator {
    display: none;
  }
  .mobile-nav-toggle { display: block; }
  .header-cta .btn-outline-download { display: none; }
  .hero-layout { grid-template-columns: 1fr; }
  .chamfered-stats-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-dual-row { grid-template-columns: 1fr; gap: 36px; }
  .feature-dual-row.reverse { direction: ltr; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }

  /* Subpages Responsive */
  .products-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
  .solution-card-row,
  .solution-card-row.reverse {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 28px;
  }
  .about-intro-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .pillars-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
  }
  .contact-layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .single-product-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .single-product-sidebar {
    position: static;
  }
}

@media (max-width: 768px) {
  .chamfered-stats-grid { grid-template-columns: 1fr; }
  .hero-main-title { font-size: 30px; }
  .floating-action-dock { right: 14px; bottom: 20px; }

  /* Subpages Mobile */
  .page-header {
    padding: 36px 0 28px;
  }
  .page-title {
    font-size: 26px;
  }
  .page-desc {
    font-size: 14.5px;
  }
  .products-grid {
    grid-template-columns: 1fr;
  }
  .pillars-grid {
    grid-template-columns: 1fr;
  }
  .form-row {
    grid-template-columns: 1fr;
    gap: 0;
  }
  .solution-card-row {
    padding: 20px;
  }
  .contact-form-wrapper,
  .contact-info-card,
  .single-block-card,
  .about-values-card {
    padding: 20px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }
}