/* ==========================================================================
   SONGMA INVEST - RENEWABLE ENERGY & ELECTRICAL INFRASTRUCTURE
   Design System & Master Stylesheet
   ========================================================================== */

:root {
  /* Brand Colors from Logo */
  --primary: #005A9E;           /* SongMa Industrial Blue */
  --primary-light: #0284C7;     /* Sky Blue Accent */
  --primary-dark: #0A2540;      /* Deep Engineering Navy */
  --primary-gradient: linear-gradient(135deg, #0A2540 0%, #005A9E 60%, #0284C7 100%);
  
  --accent: #F05A28;            /* SongMa Solar Energy Orange */
  --accent-hover: #D84A1A;
  --accent-light: #FFF1EB;
  --accent-yellow: #F59E0B;     /* Sun Flare Gold */
  
  /* Neutral & Surfaces */
  --bg-body: #F8FAFC;
  --bg-surface: #FFFFFF;
  --bg-subtle: #F1F5F9;
  --bg-blue-tint: #F0F6FF;
  
  --text-main: #1E293B;         /* Slate 800 */
  --text-muted: #64748B;        /* Slate 500 */
  --text-light: #94A3B8;
  --text-white: #FFFFFF;
  
  --border-color: #E2E8F0;
  --border-highlight: #BAE6FD;
  
  /* Typography */
  --font-heading: 'Montserrat', sans-serif;
  --font-body: 'Inter', sans-serif;
  
  /* Elevation & Radius */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --shadow-sm: 0 2px 4px rgba(10, 37, 64, 0.05);
  --shadow-md: 0 8px 24px rgba(10, 37, 64, 0.08);
  --shadow-lg: 0 16px 36px rgba(10, 37, 64, 0.12);
  --shadow-hover: 0 20px 40px rgba(0, 90, 158, 0.15);
  
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: var(--font-body);
  color: var(--text-main);
  background-color: var(--bg-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--primary-dark);
  font-weight: 700;
  line-height: 1.25;
}

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

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

.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ==========================================================================
   Utility Classes & Buttons
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: var(--radius-full);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  border: 2px solid transparent;
  transition: var(--transition);
}

.btn-primary {
  background: var(--primary);
  color: var(--text-white);
  box-shadow: 0 4px 12px rgba(0, 90, 158, 0.25);
}
.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(0, 90, 158, 0.35);
}

.btn-accent {
  background: var(--accent);
  color: var(--text-white);
  box-shadow: 0 4px 14px rgba(240, 90, 40, 0.3);
}
.btn-accent:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(240, 90, 40, 0.4);
}

.btn-outline {
  background: transparent;
  border-color: var(--primary);
  color: var(--primary);
}
.btn-outline:hover {
  background: var(--primary);
  color: var(--text-white);
}

.btn-outline-white {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.6);
  color: var(--text-white);
}
.btn-outline-white:hover {
  background: var(--text-white);
  color: var(--primary-dark);
  border-color: var(--text-white);
}

.btn-lg {
  padding: 14px 28px;
  font-size: 16px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}
.badge-primary {
  background: rgba(0, 90, 158, 0.1);
  color: var(--primary);
}
.badge-accent {
  background: var(--accent-light);
  color: var(--accent);
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 50px;
}
.section-header .badge {
  margin-bottom: 12px;
}
.section-title {
  font-size: 32px;
  margin-bottom: 14px;
}
.section-subtitle {
  color: var(--text-muted);
  font-size: 16px;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.topbar {
  background: var(--primary-dark);
  color: #FFFFFF;
  font-size: 11.5px;
  line-height: 1.4;
  padding: 6px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  white-space: nowrap;
  overflow: hidden;
}
.topbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: nowrap;
}
.topbar-info {
  display: flex;
  gap: 16px;
  align-items: center;
  flex-shrink: 1;
  min-width: 0;
  overflow: hidden;
}
.topbar-info a,
.topbar-info span {
  color: #FFFFFF;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
  transition: color 0.2s ease, opacity 0.2s ease;
}
.topbar-info a:hover {
  color: var(--accent);
}
.topbar-info i,
.topbar-links i {
  flex-shrink: 0;
}
.topbar-links {
  display: flex;
  gap: 14px;
  align-items: center;
  flex-shrink: 0;
  font-size: 11.5px;
}
.topbar-links a {
  color: #FFFFFF;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  white-space: nowrap;
  transition: color 0.2s ease, opacity 0.2s ease;
  opacity: 0.95;
}
.topbar-links a:hover {
  color: var(--accent);
  opacity: 1;
}

.header {
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 1000;
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}
.header-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}
.logo-box img {
  height: 46px;
  width: auto;
  object-fit: contain;
}

.nav-menu {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-left: auto;
}
.nav-item {
  position: relative;
  flex-shrink: 0;
}
.nav-link {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 13.5px;
  color: var(--primary-dark);
  padding: 8px 14px;
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  white-space: nowrap; /* Đảm bảo mỗi mục menu luôn trên 1 dòng */
  letter-spacing: -0.1px;
  transition: var(--transition);
}
.nav-link:hover {
  background: rgba(0, 90, 158, 0.06);
  color: var(--primary);
}
.nav-link.active {
  background: rgba(0, 90, 158, 0.1);
  color: var(--primary);
  font-weight: 700;
}

/* Dropdown */
.dropdown-menu {
  position: absolute;
  top: 100%;
  left: -20px;
  width: 280px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 12px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: var(--transition);
  z-index: 100;
}
.nav-item:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.dropdown-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.dropdown-item:hover {
  background: var(--bg-blue-tint);
}
.dropdown-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: rgba(0, 90, 158, 0.1);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.dropdown-item:hover .dropdown-icon {
  background: var(--primary);
  color: var(--text-white);
}
.dropdown-title {
  font-weight: 600;
  font-size: 14px;
  color: var(--primary-dark);
  margin-bottom: 2px;
}
.dropdown-desc {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.4;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 24px;
  color: var(--primary-dark);
  cursor: pointer;
}

/* ==========================================================================
   Hero Section with Minimalist Clean Solar Animation
   ========================================================================== */
.hero {
  position: relative;
  background: linear-gradient(180deg, #0A1E38 0%, #0F325E 60%, #16467F 100%);
  color: var(--text-white);
  padding: 80px 0 100px;
  overflow: hidden;
}

.hero-pattern {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    radial-gradient(rgba(255, 255, 255, 0.08) 1px, transparent 1px),
    radial-gradient(rgba(2, 132, 199, 0.15) 1px, transparent 1px);
  background-size: 32px 32px;
  background-position: 0 0, 16px 16px;
  opacity: 0.6;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 2;
}

.hero-content .badge {
  background: rgba(240, 90, 40, 0.2);
  color: #FFA785;
  border: 1px solid rgba(240, 90, 40, 0.4);
  margin-bottom: 20px;
}
.hero-title {
  font-size: 44px;
  color: var(--text-white);
  margin-bottom: 20px;
  line-height: 1.2;
}
.hero-title .highlight {
  background: linear-gradient(90deg, #38BDF8 0%, #F59E0B 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-desc {
  font-size: 17px;
  color: #CBD5E1;
  margin-bottom: 36px;
  line-height: 1.6;
  max-width: 580px;
}
.hero-actions {
  display: flex;
  gap: 16px;
  margin-bottom: 40px;
}
.hero-trust-list {
  display: flex;
  gap: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-top: 24px;
}
.trust-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  color: #CBD5E1;
}
.trust-item i {
  color: var(--accent-yellow);
  width: 16px;
  height: 16px;
}

/* ==========================================================================
   Hero Visual Showcase: Real Project + Glassmorphism Tech HUD
   ========================================================================== */
.hero-visual-wrapper {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
}

.hero-image-card {
  position: relative;
  width: 100%;
  max-width: 520px;
  height: 380px;
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(255, 255, 255, 0.15);
}

.hero-main-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.hero-image-card:hover .hero-main-img {
  transform: scale(1.04);
}

.hero-image-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10, 30, 56, 0.1) 0%, rgba(10, 30, 56, 0.7) 100%);
  pointer-events: none;
}

/* Floating HUD Glassmorphism Badges */
.floating-hud {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 18px;
  background: rgba(10, 37, 64, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 14px;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.35);
  z-index: 5;
  transition: transform 0.3s ease;
}

.floating-hud:hover {
  transform: translateY(-4px);
  border-color: rgba(56, 189, 248, 0.4);
}

.hud-top-right {
  top: 24px;
  right: -15px;
  animation: floatSlow 5s ease-in-out infinite;
}

.hud-bottom-left {
  bottom: 28px;
  left: -15px;
  animation: floatSlow 5s ease-in-out infinite 2.5s;
}

@keyframes floatSlow {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-8px);
  }
}

.hud-icon {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  position: relative;
}

.pulse-glow {
  box-shadow: 0 0 15px rgba(245, 158, 11, 0.3);
}

.live-dot {
  position: absolute;
  top: 6px;
  right: 6px;
  width: 7px;
  height: 7px;
  background: #10B981;
  border-radius: 50%;
  animation: livePing 1.8s infinite;
}

@keyframes livePing {
  0% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.6); opacity: 0.4; }
  100% { transform: scale(1); opacity: 1; }
}

.hud-info {
  display: flex;
  flex-direction: column;
}

.hud-label {
  font-size: 11px;
  color: #94A3B8;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 600;
}

.hud-value {
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: 700;
  color: #F8FAFC;
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.hud-value small {
  font-size: 11px;
  color: #38BDF8;
  font-weight: 500;
}

/* Mini Project Tag on Card */
.hero-project-tag {
  position: absolute;
  bottom: 14px;
  right: 16px;
  background: rgba(15, 23, 42, 0.7);
  backdrop-filter: blur(8px);
  padding: 5px 12px;
  border-radius: 20px;
  font-size: 12px;
  color: #E2E8F0;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

@media (max-width: 992px) {
  .hud-top-right {
    right: 10px;
    top: 10px;
  }
  .hud-bottom-left {
    left: 10px;
    bottom: 10px;
  }
  .hero-image-card {
    height: 320px;
  }
}

/* ==========================================================================
   SOLAR CALCULATOR (Bộ Tính Nhanh - Lead Magnet B2C)
   ========================================================================== */
.calculator-section {
  position: relative;
  margin-top: -50px;
  z-index: 10;
  margin-bottom: 60px;
}
.calculator-box {
  background: var(--bg-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-color);
  padding: 36px 40px;
}
.calc-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  align-items: center;
}
.calc-intro h3 {
  font-size: 22px;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.calc-intro p {
  color: var(--text-muted);
  font-size: 14px;
  margin-bottom: 24px;
}
.calc-slider-group {
  margin-bottom: 24px;
}
.slider-labels {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}
.bill-display {
  font-size: 24px;
  font-weight: 700;
  color: var(--primary);
  background: var(--bg-blue-tint);
  padding: 4px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-highlight);
}
.range-slider {
  width: 100%;
  height: 8px;
  border-radius: 4px;
  background: #E2E8F0;
  outline: none;
  -webkit-appearance: none;
}
.range-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(240, 90, 40, 0.4);
}

.mini-tabs-group {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 24px;
}

.mini-tab-btn {
  background: #ffffff;
  border: 1.5px solid var(--border-color, #E2E8F0);
  border-radius: 12px;
  padding: 12px 14px;
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  text-align: left;
  position: relative;
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.mini-tab-btn:hover {
  border-color: var(--primary-light, #38BDF8);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 90, 158, 0.08);
}

.mini-tab-btn.active {
  border-color: var(--primary, #005A9E);
  background: linear-gradient(145deg, #ffffff 0%, #F0F7FF 100%);
  box-shadow: 0 4px 14px rgba(0, 90, 158, 0.15);
}

.mini-tab-btn.active::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary, #005A9E), var(--accent, #F05A28));
  border-radius: 12px 12px 0 0;
}

.mini-tab-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: #F1F5F9;
  color: #64748B;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all 0.25s ease;
}

.mini-tab-icon svg,
.mini-tab-icon i {
  width: 18px;
  height: 18px;
}

.mini-tab-btn:hover .mini-tab-icon {
  background: #E0F2FE;
  color: var(--primary, #005A9E);
}

.mini-tab-btn.active .mini-tab-icon {
  background: var(--primary, #005A9E);
  color: #ffffff;
  box-shadow: 0 3px 8px rgba(0, 90, 158, 0.3);
}

.mini-tab-content {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.mini-tab-title {
  font-family: var(--font-heading, inherit);
  font-size: 13.5px;
  font-weight: 700;
  color: var(--text-main, #1E293B);
  line-height: 1.3;
  margin-bottom: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: color 0.2s ease;
}

.mini-tab-btn.active .mini-tab-title {
  color: var(--primary-dark, #004070);
}

.mini-tab-sub {
  font-size: 11px;
  color: var(--text-muted, #64748B);
  line-height: 1.2;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.mini-tab-btn.active .mini-tab-sub {
  color: var(--primary, #005A9E);
  font-weight: 500;
}

@media (max-width: 768px) {
  .mini-tabs-group {
    grid-template-columns: 1fr;
    gap: 8px;
  }
  .mini-tab-btn {
    padding: 10px 12px;
  }
}

/* Calculator Result Panel */
.calc-result-panel {
  background: linear-gradient(135deg, #F0F6FF 0%, #E6F0FC 100%);
  border: 1px solid var(--border-highlight);
  border-radius: var(--radius-md);
  padding: 24px;
}
.result-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 20px;
}
.result-item {
  background: var(--bg-surface);
  padding: 14px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(0, 90, 158, 0.1);
}
.res-label {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 4px;
}
.res-val {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary-dark);
}
.res-note {
  font-size: 11px;
  color: var(--accent);
  font-weight: 500;
}

/* ==========================================================================
   4 Core Solutions Section (B2C & B2B Dual Target)
   ========================================================================== */
.solutions {
  padding: 70px 0;
  background: var(--bg-body);
}
.solutions-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.solution-card {
  background: var(--bg-surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  padding: 30px 24px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}
.solution-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-hover);
  border-color: var(--primary-light);
}
.solution-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--border-color);
  transition: var(--transition);
}
.solution-card:hover::before {
  background: var(--primary);
}
.card-popular::before {
  background: var(--accent);
}
.solution-icon-box {
  width: 54px;
  height: 54px;
  border-radius: var(--radius-md);
  background: var(--bg-blue-tint);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 20px;
}
.card-popular .solution-icon-box {
  background: var(--accent-light);
  color: var(--accent);
}
.solution-title {
  font-size: 19px;
  margin-bottom: 12px;
}
.solution-desc {
  color: var(--text-muted);
  font-size: 14px;
  margin-bottom: 20px;
  flex-grow: 1;
}
.solution-features {
  list-style: none;
  margin-bottom: 24px;
  border-top: 1px solid var(--border-color);
  padding-top: 16px;
}
.solution-features li {
  font-size: 13px;
  color: var(--text-main);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.solution-features li i {
  color: var(--primary);
  font-size: 14px;
}
.solution-link {
  font-family: var(--font-heading);
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.solution-link:hover {
  color: var(--accent);
  gap: 10px;
}

/* ==========================================================================
   Engineering & Equipment Capacity (Tier 1 Partners)
   ========================================================================== */
.capacity {
  padding: 80px 0;
  background: var(--bg-surface);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}
.capacity-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: center;
}
.capacity-content h2 {
  font-size: 32px;
  margin-bottom: 18px;
}
.capacity-content p {
  color: var(--text-muted);
  margin-bottom: 24px;
  font-size: 15px;
}
.capacity-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 30px;
}
.cap-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}
.cap-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: var(--bg-blue-tint);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.cap-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary-dark);
}
.cap-desc {
  font-size: 12px;
  color: var(--text-muted);
}

.partners-card {
  background: var(--bg-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
}
.partners-card h4 {
  font-size: 16px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 20px;
  color: var(--text-muted);
  text-align: center;
}
.partners-logo-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.partner-logo-item {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 16px 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--primary-dark);
  font-size: 14px;
  text-align: center;
  box-shadow: var(--shadow-sm);
}

/* ==========================================================================
   Policies & Knowledge (Chính sách & Cẩm nang)
   ========================================================================== */
.knowledge-section {
  padding: 80px 0;
  background: var(--bg-body);
}
.knowledge-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}
.column-box {
  background: var(--bg-surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  padding: 32px;
}
.column-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 16px;
}
.column-title {
  font-size: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.article-item {
  display: flex;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--border-color);
}
.article-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}
.article-tag {
  font-size: 11px;
  background: var(--bg-blue-tint);
  color: var(--primary);
  padding: 3px 8px;
  border-radius: 4px;
  font-weight: 600;
  display: inline-block;
  margin-bottom: 6px;
}
.article-tag.tag-legal {
  background: #FEF3C7;
  color: #B45309;
}
.article-heading {
  font-size: 15px;
  font-weight: 600;
  color: var(--primary-dark);
  margin-bottom: 6px;
  line-height: 1.4;
}
.article-heading a:hover {
  color: var(--primary);
}
.article-meta {
  font-size: 12px;
  color: var(--text-light);
  display: flex;
  align-items: center;
  gap: 12px;
}

/* ==========================================================================
   Featured Projects (Dự án tiêu biểu)
   ========================================================================== */
.projects {
  padding: 80px 0;
  background: var(--bg-surface);
}
.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.project-card {
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}
.project-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}
.project-thumb {
  height: 200px;
  background-size: cover;
  background-position: center;
  position: relative;
}
.project-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  background: rgba(10, 37, 64, 0.85);
  color: var(--text-white);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-size: 11px;
  font-weight: 600;
  backdrop-filter: blur(4px);
}
.project-body {
  padding: 20px;
}
.project-title {
  font-size: 17px;
  margin-bottom: 8px;
}
.project-meta {
  font-size: 13px;
  color: var(--text-muted);
  display: flex;
  gap: 16px;
  margin-bottom: 12px;
}
.project-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ==========================================================================
   CTA Banner
   ========================================================================== */
.cta-banner {
  background: var(--primary-gradient);
  color: var(--text-white);
  padding: 70px 0;
  position: relative;
  overflow: hidden;
}
.cta-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}
.cta-text h2 {
  color: var(--text-white);
  font-size: 32px;
  margin-bottom: 12px;
}
.cta-text p {
  color: #E2E8F0;
  font-size: 16px;
  max-width: 600px;
}
.cta-btns {
  display: flex;
  gap: 16px;
  flex-shrink: 0;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
  background: var(--primary-dark);
  color: #94A3B8;
  padding: 70px 0 30px;
  font-size: 14px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 50px;
}
.footer-brand img {
  height: 48px;
  margin-bottom: 20px;
  background: #FFFFFF;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
}
.footer-desc {
  line-height: 1.6;
  margin-bottom: 20px;
}
.footer-col h4 {
  color: var(--text-white);
  font-size: 16px;
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 10px;
}
.footer-col h4::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 32px;
  height: 2px;
  background: var(--accent);
}
.footer-links {
  list-style: none;
}
.footer-links li {
  margin-bottom: 10px;
}
.footer-links a {
  color: #CBD5E1;
}
.footer-links a:hover {
  color: var(--accent);
  padding-left: 4px;
}
.footer-contact li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 14px;
  color: #CBD5E1;
}
.footer-contact i {
  color: var(--accent);
  flex-shrink: 0;
  margin-top: 4px;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 25px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
}

/* ==========================================================================
   Subpages Specific Styles (Breadcrumbs, Filters, Sidebars, Forms)
   ========================================================================== */
.page-header {
  background: var(--primary-gradient);
  color: var(--text-white);
  padding: 50px 0;
}
.page-header h1 {
  color: var(--text-white);
  font-size: 36px;
  margin-bottom: 10px;
}
.breadcrumbs {
  display: flex;
  gap: 8px;
  font-size: 13px;
  color: #CBD5E1;
}
.breadcrumbs a {
  color: #38BDF8;
}

.page-content {
  padding: 60px 0;
}

/* Subpage Utilities */
.contact-hero {
  background: var(--primary-gradient);
  color: var(--text-white);
  padding: 50px 0 60px;
}
.contact-hero h1 {
  color: var(--text-white);
  font-size: 36px;
  margin-bottom: 8px;
}
.contact-hero p {
  color: #CBD5E1;
  font-size: 16px;
}

.subpage-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}
.subpage-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--border-highlight);
}

.form-control-v2 {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 14px;
  background-color: #FAFAFA;
  transition: var(--transition);
}
.form-control-v2:focus {
  outline: none;
  border-color: var(--primary-light);
  background-color: #FFFFFF;
  box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.15);
}

/* ==========================================================================
   Product Archive & Single Product V2 Styles
   ========================================================================== */
.product-archive-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 32px;
  align-items: start;
}

.product-sidebar-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 90px;
}

.product-sidebar-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--primary-dark);
  padding-bottom: 12px;
  margin-bottom: 14px;
  border-bottom: 2px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 8px;
}

.product-category-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.product-category-item {
  margin-bottom: 4px;
}

.product-category-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  font-size: 13.5px;
  color: var(--text-main);
  font-weight: 500;
  transition: var(--transition);
}
.product-category-link:hover {
  background: var(--bg-blue-tint);
  color: var(--primary);
}
.product-category-link.active {
  background: var(--primary-gradient);
  color: var(--text-white);
  font-weight: 600;
  box-shadow: 0 2px 8px rgba(0, 90, 158, 0.25);
}

.product-category-sub {
  list-style: none;
  padding-left: 14px;
  margin: 4px 0 6px;
  border-left: 2px solid var(--border-color);
}
.product-category-sub li a {
  display: block;
  padding: 6px 10px;
  font-size: 12.5px;
  color: var(--text-muted);
  border-radius: 4px;
  transition: var(--transition);
}
.product-category-sub li a:hover {
  color: var(--primary);
  background: var(--bg-blue-tint);
}
.product-category-sub li a.active {
  color: var(--primary);
  font-weight: 600;
  background: var(--bg-blue-tint);
}

.product-topbar-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 24px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 12px 18px;
}

.product-search-box {
  position: relative;
  flex: 1;
  max-width: 400px;
}
.product-search-box input {
  width: 100%;
  padding: 9px 14px 9px 38px;
  font-size: 13.5px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: var(--bg-subtle);
  transition: var(--transition);
}
.product-search-box input:focus {
  outline: none;
  border-color: var(--primary);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(0, 90, 158, 0.12);
}
.product-search-box i {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
}

.product-count-badge {
  font-size: 13px;
  color: var(--text-muted);
  white-space: nowrap;
}

.product-v2-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.product-card-v2 {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  position: relative;
}
.product-card-v2:hover {
  transform: translateY(-5px);
  border-color: var(--border-highlight);
  box-shadow: var(--shadow-lg);
}

.product-card-v2 .product-thumb-wrap {
  position: relative;
  width: 100%;
  height: 220px;
  background: var(--bg-subtle);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}
.product-card-v2 .product-thumb-wrap a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
}
.product-card-v2 .product-thumb-wrap img {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
  transition: transform 0.4s ease;
}
.product-card-v2:hover .product-thumb-wrap img {
  transform: scale(1.06);
}

/* Refined, modern featured indicator */
.product-card-v2 .product-featured-indicator {
  position: absolute;
  top: 10px;
  right: 10px;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  padding: 4px 9px 4px 7px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(226, 232, 240, 0.8);
  font-size: 11px;
  font-weight: 600;
  color: var(--primary-dark);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.04);
  transition: var(--transition);
}
.product-card-v2:hover .product-featured-indicator {
  border-color: rgba(0, 90, 158, 0.25);
  box-shadow: 0 4px 12px rgba(0, 90, 158, 0.12);
}
.product-featured-indicator .indicator-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 6px rgba(240, 90, 40, 0.6);
}

/* Brand Partners Bar & Logo Items */
.brand-partner-card {
  display: flex;
  align-items: center;
  justify-content: center;
  background: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: var(--radius-md);
  padding: 12px 20px;
  height: 64px;
  transition: var(--transition);
}
.brand-partner-card:hover {
  border-color: var(--primary);
  box-shadow: 0 6px 16px rgba(0, 90, 158, 0.12);
  transform: translateY(-2px);
}
.brand-partner-card img {
  height: 38px;
  width: auto;
  max-width: 150px;
  object-fit: contain;
  filter: grayscale(0%);
  transition: var(--transition);
}
.brand-partner-card:hover img {
  transform: scale(1.05);
}


.product-card-v2 .product-body {
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.product-card-v2 .product-sku {
  font-size: 11.5px;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 6px;
}

.product-card-v2 .product-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.4;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 44px;
}
.product-card-v2 .product-title a {
  color: inherit;
  transition: color 0.2s;
}
.product-card-v2:hover .product-title a {
  color: var(--primary);
}

.product-card-v2 .product-summary {
  font-size: 12.5px;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 16px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
}

.product-card-v2 .product-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 12px;
  border-top: 1px solid var(--border-color);
  margin-top: auto;
}

.product-card-v2 .product-price {
  font-size: 15px;
  font-weight: 700;
  color: var(--accent);
}

/* Single Product Detail V2 Styles */
.product-detail-layout {
  display: grid;
  grid-template-columns: 480px 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.product-gallery-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  box-shadow: var(--shadow-sm);
}

.product-main-view {
  width: 100%;
  aspect-ratio: 1;
  background: var(--bg-subtle);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  margin-bottom: 14px;
  cursor: zoom-in;
}
.product-main-view img {
  max-width: 90%;
  max-height: 90%;
  object-fit: contain;
  transition: transform 0.3s ease;
}
.product-main-view:hover img {
  transform: scale(1.05);
}

.product-thumbs-strip {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding-bottom: 4px;
}
.product-thumb-btn {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-sm);
  border: 2px solid transparent;
  background: var(--bg-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  overflow: hidden;
  padding: 4px;
  transition: var(--transition);
  opacity: 0.6;
}
.product-thumb-btn.active,
.product-thumb-btn:hover {
  border-color: var(--primary);
  opacity: 1;
}
.product-thumb-btn img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.product-info-col h1 {
  font-size: 28px;
  font-weight: 800;
  color: var(--primary-dark);
  line-height: 1.3;
  margin-bottom: 12px;
}

.product-meta-row {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 16px;
  font-size: 13px;
  color: var(--text-muted);
}

.product-price-box {
  background: var(--bg-blue-tint);
  border: 1px solid rgba(0, 90, 158, 0.15);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}
.product-price-box .price-label {
  font-size: 14px;
  color: var(--text-muted);
}
.product-price-box .price-val {
  font-size: 24px;
  font-weight: 800;
  color: var(--accent);
}

.product-trust-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 28px;
  padding: 16px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
}
.product-trust-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--text-main);
  font-weight: 500;
}
.product-trust-item i {
  color: #10B981;
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.product-actions-bar {
  display: flex;
  gap: 14px;
  margin-bottom: 32px;
}

.product-tab-nav {
  display: flex;
  border-bottom: 2px solid var(--border-color);
  margin-bottom: 24px;
  gap: 8px;
}
.product-tab-btn {
  padding: 12px 24px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-muted);
  background: none;
  border: none;
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
  cursor: pointer;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.product-tab-btn:hover {
  color: var(--primary);
}
.product-tab-btn.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

.product-tab-pane {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--text-main);
}
.product-tab-pane table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
}
.product-tab-pane table th,
.product-tab-pane table td {
  padding: 10px 14px;
  border: 1px solid var(--border-color);
  font-size: 13.5px;
}
.product-tab-pane table th {
  background: var(--bg-subtle);
  font-weight: 600;
  text-align: left;
}

/* Modal Quote V2 */
.quote-modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(10, 37, 64, 0.7);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.quote-modal-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 520px;
  box-shadow: var(--shadow-lg);
  position: relative;
  animation: modalScaleUp 0.25s ease-out;
}
@keyframes modalScaleUp {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

/* Responsive Product */
@media (max-width: 1024px) {
  .product-archive-layout {
    grid-template-columns: 1fr;
  }
  .product-v2-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .product-detail-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .product-v2-grid {
    grid-template-columns: 1fr;
  }
  .product-trust-list {
    grid-template-columns: 1fr;
  }
  .product-actions-bar {
    flex-direction: column;
  }
}

/* ==========================================================================
   About Us Page (Giới thiệu) V2 Styles
   ========================================================================== */
.about-overview-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
  margin-bottom: 60px;
}
.about-visual-wrap {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-color);
  background: var(--bg-surface);
}
.about-main-img {
  width: 100%;
  height: 420px;
  object-fit: cover;
  display: block;
  transition: transform 0.6s ease;
}
.about-visual-wrap:hover .about-main-img {
  transform: scale(1.03);
}

/* Company Specs Grid */
.company-specs-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  padding: 32px;
  margin-bottom: 60px;
}
.company-specs-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.specs-table {
  width: 100%;
  border-collapse: collapse;
}
.specs-table tr {
  border-bottom: 1px solid var(--border-color);
}
.specs-table tr:last-child {
  border-bottom: none;
}
.specs-table td {
  padding: 14px 16px;
  font-size: 14px;
}
.specs-table td.label-cell {
  width: 240px;
  color: var(--text-muted);
  font-weight: 600;
  background: var(--bg-subtle);
  border-right: 1px solid var(--border-color);
}
.specs-table td.val-cell {
  color: var(--text-main);
  font-weight: 500;
}

/* Core Values 4-Grid */
.core-values-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 60px;
}
.core-value-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  height: 100%;
}
.core-value-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-highlight);
  box-shadow: var(--shadow-lg);
}
.core-value-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: var(--bg-blue-tint);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}
.core-value-card:nth-child(2) .core-value-icon {
  background: rgba(234, 88, 12, 0.1);
  color: var(--accent);
}
.core-value-card:nth-child(3) .core-value-icon {
  background: rgba(16, 185, 129, 0.1);
  color: #10B981;
}
.core-value-card:nth-child(4) .core-value-icon {
  background: rgba(14, 165, 233, 0.1);
  color: #0EA5E9;
}
.core-value-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: 10px;
}
.core-value-desc {
  font-size: 13.5px;
  color: var(--text-muted);
  line-height: 1.65;
  margin: 0;
}

/* Capabilities Pillar Grid */
.capabilities-pillar-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-bottom: 60px;
}
.pillar-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}
.pillar-card:hover {
  border-color: var(--border-highlight);
  box-shadow: var(--shadow-md);
}
.pillar-card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  display: block;
}
.pillar-card-body {
  padding: 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.pillar-card-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--primary-dark);
  margin: 12px 0 10px;
}
.pillar-card-desc {
  font-size: 13.5px;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 16px;
  flex: 1;
}
.pillar-features {
  list-style: none;
  padding: 0;
  margin: 0 0 20px;
}
.pillar-features li {
  font-size: 13px;
  color: var(--text-main);
  padding: 6px 0;
  display: flex;
  align-items: center;
  gap: 8px;
  border-top: 1px dashed var(--border-color);
}
.pillar-features li i {
  color: var(--primary);
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

/* Executive Message Box */
.executive-card {
  background: linear-gradient(135deg, var(--primary-dark) 0%, #0F2847 100%);
  color: var(--text-white);
  border-radius: var(--radius-lg);
  padding: 40px;
  margin-bottom: 60px;
  position: relative;
  overflow: hidden;
}
.executive-card::before {
  content: "";
  position: absolute;
  top: -50px;
  right: -50px;
  width: 250px;
  height: 250px;
  background: radial-gradient(circle, rgba(2, 132, 199, 0.25) 0%, transparent 70%);
  border-radius: 50%;
}
.executive-grid {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 32px;
  align-items: center;
  position: relative;
  z-index: 1;
}
.executive-avatar-box {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  border: 4px solid rgba(255, 255, 255, 0.15);
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-white);
  font-size: 38px;
  font-weight: 800;
  font-family: var(--font-heading);
  letter-spacing: 2px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.25);
}
.executive-quote {
  font-size: 16px;
  line-height: 1.7;
  color: #E2E8F0;
  font-style: italic;
  margin-bottom: 16px;
}
.executive-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 4px;
}
.executive-role {
  font-size: 13px;
  color: #38BDF8;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 600;
}

/* Strategic Partners Grid */
.partners-grid-v2 {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
  margin-bottom: 60px;
}
.partner-logo-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 80px;
  transition: var(--transition);
}
.partner-logo-card:hover {
  border-color: var(--primary-light);
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
}
.partner-logo-card img {
  max-height: 36px;
  max-width: 100%;
  object-fit: contain;
  filter: grayscale(80%);
  opacity: 0.85;
  transition: var(--transition);
}
.partner-logo-card:hover img {
  filter: grayscale(0%);
  opacity: 1;
}

/* ==========================================================================
   Contact Page (Liên hệ) V2 Styles
   ========================================================================== */
.contact-channels-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}
.contact-channel-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.contact-channel-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-highlight);
}
.contact-card-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 18px;
}
.contact-card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--bg-blue-tint);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.contact-card-tag {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 700;
  color: var(--primary);
}
.contact-card-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--primary-dark);
  margin-top: 2px;
}
.contact-card-content {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 16px;
  flex: 1;
}
.contact-card-action {
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px solid var(--border-color);
}
.contact-card-action a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  transition: var(--transition);
}
.contact-card-action a:hover {
  color: var(--primary-light);
  gap: 9px;
}

/* Contact Main 2-Col Layout */
.contact-main-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
  align-items: start;
}
.contact-map-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}
.contact-map-iframe {
  width: 100%;
  height: 380px;
  border: 0;
  display: block;
}
.contact-map-footer {
  padding: 16px 20px;
  background: var(--bg-subtle);
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
}

/* Contact Form Card */
.contact-form-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}
.contact-form-header {
  background: var(--primary-gradient);
  padding: 24px 28px;
  color: var(--text-white);
  display: flex;
  align-items: center;
  gap: 16px;
}
.contact-form-header-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-white);
  flex-shrink: 0;
}
.contact-form-body {
  padding: 28px;
}
.form-group-v2 {
  margin-bottom: 16px;
}
.form-group-v2 label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 6px;
}
.form-group-v2 label span.req {
  color: #EF4444;
}
.form-row-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

/* Captcha Bar */
.captcha-box-v2 {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 16px;
  background: var(--bg-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
}
.captcha-math {
  font-size: 14px;
  color: var(--text-main);
  font-weight: 600;
  white-space: nowrap;
}
.captcha-input {
  width: 100px;
  text-align: center;
  font-weight: 700;
  letter-spacing: 2px;
}

/* Success Message Box */
.contact-success-card {
  text-align: center;
  padding: 48px 24px;
}
.success-icon-wrap {
  width: 68px;
  height: 68px;
  border-radius: 50%;
  background: rgba(16, 185, 129, 0.12);
  color: #10B981;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
}

/* Emergency Notice Card */
.emergency-notice-card {
  margin-top: 24px;
  background: rgba(234, 88, 12, 0.06);
  border: 1px solid rgba(234, 88, 12, 0.25);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  display: flex;
  align-items: center;
  gap: 16px;
}
.emergency-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--accent);
  color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

/* Responsive Media Queries */
@media (max-width: 1260px) {
  .nav-menu { gap: 12px; }
  .nav-link { font-size: 12px; }
  .header-actions .btn { padding: 8px 15px; font-size: 13px; }
  .logo-box img { height: 42px; }
}

@media (max-width: 1200px) {
  .topbar { font-size: 11px; }
  .topbar-info { gap: 12px; }
  .topbar-links { gap: 10px; font-size: 11px; }
}

@media (max-width: 1024px) {
  .topbar-info span:nth-child(3) { display: none; } /* Ẩn giờ làm việc trên tablet để giữ 1 dòng thoáng */
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .calc-grid { grid-template-columns: 1fr; }
  .solutions-grid { grid-template-columns: repeat(2, 1fr); }
  .capacity-grid { grid-template-columns: 1fr; }
  .knowledge-grid { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .cta-wrapper { flex-direction: column; text-align: center; }
  .nav-menu { display: none; }
  .mobile-toggle { display: block; }

  /* About & Contact Tablet */
  .about-overview-grid { grid-template-columns: 1fr; gap: 32px; }
  .about-main-img { height: 320px; }
  .core-values-grid { grid-template-columns: repeat(2, 1fr); }
  .capabilities-pillar-grid { grid-template-columns: 1fr; }
  .executive-grid { grid-template-columns: 1fr; text-align: center; justify-items: center; }
  .partners-grid-v2 { grid-template-columns: repeat(3, 1fr); }
  .contact-channels-grid { grid-template-columns: 1fr; }
  .contact-details-grid { grid-template-columns: repeat(2, 1fr) !important; }
  .contact-main-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .hero-title { font-size: 32px; }
  .hero-actions { flex-direction: column; }
  .solutions-grid { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .topbar { display: none; }
  .footer-bottom { flex-direction: column; gap: 10px; text-align: center; }

  /* About & Contact Mobile */
  .contact-about-hero { padding: 24px 20px !important; }
  .contact-details-grid { grid-template-columns: 1fr !important; }
  .core-values-grid { grid-template-columns: 1fr; }
  .partners-grid-v2 { grid-template-columns: repeat(2, 1fr); }
  .form-row-2 { grid-template-columns: 1fr; }
  .company-specs-box { padding: 20px 16px; }
  .specs-table td.label-cell { width: 130px; font-size: 12.5px; padding: 10px; }
  .specs-table td.val-cell { font-size: 13px; padding: 10px; }
  .contact-form-body { padding: 20px 16px; }
}