/* ==========================================================================
   VTI SENSOR DESIGN SYSTEM — COMPONENTS (components.css)
   Thành phần giao diện B2B cao cấp (Heimdall & Dewesoft Grade)
   ========================================================================== */

/* --- 1. RESET & NỀN TẢNG THÀNH PHẦN --- */
*, *::before, *::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--vti-font-sans);
  color: var(--vti-text-ink);
  background-color: var(--vti-bg-page);
  line-height: var(--vti-leading-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.vti-container {
  width: 100%;
  max-width: var(--vti-container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--vti-container-padding);
  padding-right: var(--vti-container-padding);
}

/* Nền sáng / Nền tối xen kẽ */
.vti-theme-dark {
  background-color: var(--vti-navy-dark);
  color: var(--vti-text-on-dark);
}

.vti-theme-dark .vti-lead {
  color: var(--vti-text-on-dark-muted);
}

/* --- 2. ANNOUNCEMENT BAR (THANH THÔNG BÁO MỎNG) --- */
.vti-announcement-bar {
  background: #091a2e;
  color: #d1e2f4;
  font-size: var(--vti-text-xs);
  padding: 8px var(--vti-container-padding);
  border-bottom: 1px solid var(--vti-border-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: var(--vti-z-header);
}

.vti-announcement-link {
  color: inherit;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 500;
  transition: color var(--vti-transition-fast);
}

.vti-announcement-link:hover {
  color: var(--vti-amber-warm);
}

.vti-announcement-badge {
  background: var(--vti-amber-warm);
  color: var(--vti-navy-dark);
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: var(--vti-radius-full);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.vti-announcement-close {
  position: absolute;
  right: var(--vti-container-padding);
  background: transparent;
  border: none;
  color: #94a3b8;
  cursor: pointer;
  padding: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color var(--vti-transition-fast);
}

.vti-announcement-close:hover {
  color: #fff;
}

/* --- 3. HEADER & MEGA-MENU (KIỂU DEWESOFT) --- */
.vti-header {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--vti-z-header);
  background: rgba(7, 21, 36, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--vti-border-dark);
  transition: background var(--vti-transition-base), border-color var(--vti-transition-base);
}

.vti-header-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.vti-header-logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.vti-logo-badge {
  background: #ffffff;
  padding: 5px 12px;
  border-radius: var(--vti-radius-sm);
  display: inline-flex;
  align-items: center;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.vti-header-logo img,
.vti-header-logo svg {
  height: 28px;
  width: auto;
  display: block;
}

.vti-nav-menu {
  display: flex;
  align-items: center;
  gap: 6px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.vti-nav-item {
  position: relative;
}

.vti-nav-link {
  background: transparent;
  border: none;
  outline: none;
  font-family: inherit;
  color: #e2e8f0;
  text-decoration: none;
  font-size: var(--vti-text-sm);
  font-weight: 500;
  padding: 10px 14px;
  border-radius: var(--vti-radius-sm);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color var(--vti-transition-fast), background-color var(--vti-transition-fast);
  cursor: pointer;
}

.vti-nav-link:hover,
.vti-nav-item.open > .vti-nav-link {
  color: #ffffff;
  background-color: rgba(255, 255, 255, 0.08);
}

.vti-header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.vti-lang-switch {
  color: #94a3b8;
  text-decoration: none;
  font-size: var(--vti-text-xs);
  font-weight: 600;
  padding: 6px 10px;
  border: 1px solid var(--vti-border-dark);
  border-radius: var(--vti-radius-sm);
  transition: all var(--vti-transition-fast);
}

.vti-lang-switch:hover {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.3);
}

/* Mega-Menu Panel kiểu Dewesoft */
.vti-mega-panel {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  background: var(--vti-navy-surface);
  border: 1px solid var(--vti-border-dark);
  border-radius: var(--vti-radius-md);
  box-shadow: var(--vti-shadow-dark);
  padding: 24px;
  min-width: 680px;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--vti-transition-base), transform var(--vti-transition-base), visibility var(--vti-transition-base);
  z-index: var(--vti-z-dropdown);
}

.vti-nav-item:hover .vti-mega-panel,
.vti-nav-item.open .vti-mega-panel {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.vti-mega-grid-products {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.vti-mega-card {
  display: flex;
  flex-direction: column;
  padding: 14px;
  border-radius: var(--vti-radius-sm);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  text-decoration: none;
  color: var(--vti-text-on-dark);
  transition: all var(--vti-transition-fast);
}

.vti-mega-card:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--vti-amber-warm);
  transform: translateY(-2px);
}

.vti-mega-card img {
  height: 64px;
  width: auto;
  object-fit: contain;
  margin-bottom: 8px;
}

.vti-mega-card h4 {
  margin: 0 0 4px;
  font-size: var(--vti-text-sm);
  font-weight: 600;
  color: #fff;
}

.vti-mega-card p {
  margin: 0;
  font-size: var(--vti-text-xs);
  color: var(--vti-text-on-dark-muted);
  line-height: 1.4;
}

.vti-mega-cols-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.vti-mega-col-title {
  font-size: var(--vti-text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--vti-amber-warm);
  margin-bottom: 12px;
  font-weight: 700;
}

.vti-mega-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.vti-mega-list a {
  color: #cbd5e1;
  text-decoration: none;
  font-size: var(--vti-text-sm);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px;
  border-radius: var(--vti-radius-xs);
  transition: all var(--vti-transition-fast);
}

.vti-mega-list a:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.06);
}

/* Mobile Toggle */
.vti-mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: #fff;
  padding: 8px;
  cursor: pointer;
}

/* --- 4. BUTTONS (HỆ THỐNG NÚT BẤM) --- */
.vti-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-family: inherit;
  font-size: var(--vti-text-sm);
  font-weight: 600;
  line-height: 1;
  padding: 14px 24px;
  min-height: 46px;
  border-radius: var(--vti-radius-sm);
  border: 1px solid transparent;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--vti-transition-base);
  user-select: none;
  white-space: nowrap;
}

.vti-btn:focus-visible {
  outline: 2px solid var(--vti-cyan-cool);
  outline-offset: 2px;
}

/* Nút chính (Primary) - Hổ phách nhiệt */
.vti-btn-primary {
  background-color: var(--vti-amber-warm);
  color: #071524;
  border-color: var(--vti-amber-warm);
  box-shadow: 0 2px 10px rgba(229, 147, 36, 0.25);
}

.vti-btn-primary:hover {
  background-color: var(--vti-amber-hover);
  border-color: var(--vti-amber-hover);
  box-shadow: 0 4px 18px rgba(229, 147, 36, 0.4);
  transform: translateY(-1px);
}

/* Nút phụ (Secondary) - Xanh than hoặc viền sáng */
.vti-btn-secondary {
  background-color: transparent;
  color: var(--vti-text-on-dark);
  border-color: var(--vti-border-dark);
  background-color: rgba(255, 255, 255, 0.06);
}

.vti-btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.3);
  color: #fff;
  transform: translateY(-1px);
}

/* Nút nền sáng */
.vti-theme-light .vti-btn-secondary,
.vti-btn-secondary-light {
  background-color: #ffffff;
  color: var(--vti-navy-brand);
  border-color: var(--vti-border);
}

.vti-btn-secondary-light:hover {
  background-color: var(--vti-bg-alt);
  border-color: var(--vti-navy-brand);
}

/* Nút Ghost */
.vti-btn-ghost {
  background-color: transparent;
  color: inherit;
  border-color: transparent;
  padding: 10px 16px;
  min-height: auto;
}

.vti-btn-ghost:hover {
  background-color: rgba(255, 255, 255, 0.08);
  color: var(--vti-amber-warm);
}

/* --- 5. CHIP / PILL (NHÃN & BADGE TIÊU CHUẨN) --- */
.vti-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: var(--vti-text-xs);
  font-weight: 600;
  padding: 6px 14px;
  border-radius: var(--vti-radius-full);
  background: rgba(255, 255, 255, 0.06);
  color: var(--vti-text-on-dark-muted);
  border: 1px solid var(--vti-border-dark);
  line-height: 1;
  text-decoration: none;
  transition: all var(--vti-transition-fast);
}

.vti-chip:hover {
  border-color: var(--vti-amber-warm);
  color: #fff;
}

.vti-chip.active {
  background: var(--vti-amber-warm);
  color: var(--vti-navy-dark);
  border-color: var(--vti-amber-warm);
}

.vti-chip-light {
  background: var(--vti-bg-alt);
  color: var(--vti-text-muted);
  border-color: var(--vti-border);
}

.vti-chip-light:hover {
  background: #fff;
  border-color: var(--vti-navy-brand);
  color: var(--vti-navy-brand);
}

/* --- 6. STAT (SỐ LỚN ĐO LƯỜNG - HEIMDALL STYLE) --- */
.vti-stat-card {
  display: flex;
  flex-direction: column;
  padding: var(--vti-space-6);
  border-radius: var(--vti-radius-md);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--vti-border-dark);
  position: relative;
  overflow: hidden;
}

.vti-stat-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--vti-gradient-thermal);
  opacity: 0.8;
}

.vti-stat-number {
  font-size: var(--vti-stat-num);
  font-weight: 800;
  line-height: 1.1;
  color: #ffffff;
  font-variant-numeric: tabular-nums;
  margin-bottom: var(--vti-space-2);
}

.vti-stat-label {
  font-size: var(--vti-text-sm);
  color: var(--vti-text-on-dark-muted);
  line-height: 1.4;
  margin: 0;
}

/* --- 7. CARDS (HỆ THỐNG THẺ CHUYÊN BIỆT) --- */
.vti-card {
  background: var(--vti-bg-surface);
  border: 1px solid var(--vti-border);
  border-radius: var(--vti-radius-md);
  padding: var(--vti-space-6);
  transition: transform var(--vti-transition-base), box-shadow var(--vti-transition-base), border-color var(--vti-transition-base);
}

.vti-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--vti-shadow-lg);
  border-color: #cbd5e1;
}

/* Card Case Study (16:9 + Metric lớn) */
.vti-card-case {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  padding: 0;
}

.vti-card-case-thumb {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background-color: var(--vti-navy-dark);
}

.vti-card-case-body {
  padding: var(--vti-space-6);
  display: flex;
  flex-direction: column;
  flex: 1;
}

.vti-card-case-metric {
  font-size: var(--vti-text-3xl);
  font-weight: 800;
  color: var(--vti-navy-brand);
  margin: 10px 0 4px;
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
}

.vti-card-case-metric-label {
  font-size: var(--vti-text-xs);
  color: var(--vti-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
  margin-bottom: 12px;
}

/* Card Sản phẩm lớn (Panel 2 cột) - Dewesoft & Heimdall Grade */
.vti-products-section {
  background-color: var(--vti-navy-dark) !important;
  color: var(--vti-text-on-dark) !important;
  padding: clamp(60px, 8vw, 100px) 0;
  position: relative;
  border-top: 1px solid var(--vti-border-dark);
}

.vti-products-section .vti-h2 {
  color: #ffffff !important;
}

.vti-products-section .vti-lead {
  color: var(--vti-text-on-dark-muted) !important;
}

.vti-product-panel {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--vti-space-10);
  align-items: center;
  background: var(--vti-navy-surface);
  border: 1px solid var(--vti-border-dark);
  border-radius: var(--vti-radius-lg);
  padding: clamp(24px, 4vw, 48px);
  margin-bottom: var(--vti-space-12);
  color: var(--vti-text-on-dark);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.35);
}

@media (max-width: 991px) {
  .vti-product-panel {
    grid-template-columns: 1fr;
    gap: var(--vti-space-8);
  }
}

.vti-product-panel.reverse {
  grid-template-columns: 1fr 1fr;
}

@media (min-width: 992px) {
  .vti-product-panel.reverse .vti-product-info-col {
    order: 1;
  }
  .vti-product-panel.reverse .vti-product-media-col {
    order: 2;
  }
}

/* --- 8. SPEC STRIP (DẢI ICON + THÔNG SỐ) --- */
.vti-spec-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 12px;
  margin: var(--vti-space-6) 0;
}

.vti-spec-box {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--vti-border-dark);
  border-radius: var(--vti-radius-sm);
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  transition: all var(--vti-transition-fast);
}

.vti-spec-box:hover {
  background: rgba(255, 255, 255, 0.07);
  border-color: rgba(56, 189, 248, 0.4);
}

.vti-spec-icon {
  width: 20px;
  height: 20px;
  stroke: var(--vti-cyan-cool);
}

.vti-spec-value {
  font-size: var(--vti-text-base);
  font-weight: 700;
  color: var(--vti-cyan-cool);
  letter-spacing: -0.01em;
}

.vti-spec-label {
  font-size: 11px;
  color: var(--vti-text-on-dark-muted);
}

/* --- 9. TABS & ACCORDION --- */
.vti-tabs-nav {
  display: flex;
  gap: 8px;
  border-bottom: 1px solid var(--vti-border-dark);
  padding-bottom: 8px;
  overflow-x: auto;
  scrollbar-width: none;
}

.vti-tab-btn {
  background: transparent;
  border: none;
  color: var(--vti-text-on-dark-muted);
  font-family: inherit;
  font-size: var(--vti-text-sm);
  font-weight: 600;
  padding: 10px 18px;
  border-radius: var(--vti-radius-sm);
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--vti-transition-fast);
}

.vti-tab-btn:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.06);
}

.vti-tab-btn.active {
  color: var(--vti-navy-dark);
  background: var(--vti-amber-warm);
}

.vti-tab-pane {
  display: none;
  padding-top: var(--vti-space-6);
}

.vti-tab-pane.active {
  display: block;
}

/* ==================== GIAI ĐOẠN 3 COMPONENTS ==================== */

/* --- DẢI LẮP NHANH TRONG ĐỢT CẮT ĐIỆN KẾ HOẠCH --- */
.vti-quick-install-band {
  background: var(--vti-navy-surface);
  border-top: 1px solid var(--vti-border-dark);
  border-bottom: 1px solid var(--vti-border-dark);
  padding: clamp(32px, 5vw, 48px) 0;
  position: relative;
  overflow: hidden;
}

.vti-quick-install-grid {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: clamp(24px, 4vw, 48px);
  align-items: center;
}

@media (max-width: 900px) {
  .vti-quick-install-grid {
    grid-template-columns: 1fr;
  }
}

.vti-quick-install-media {
  position: relative;
  border-radius: var(--vti-radius-md);
  overflow: hidden;
  border: 1px solid var(--vti-border-dark);
  background: rgba(0, 0, 0, 0.3);
  aspect-ratio: 16 / 10;
  display: flex;
  align-items: center;
  justify-content: center;
}

.vti-quick-install-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--vti-transition-base);
}

.vti-quick-install-media:hover img {
  transform: scale(1.03);
}

.vti-quick-install-tag {
  position: absolute;
  top: 12px;
  left: 12px;
  background: rgba(7, 21, 36, 0.85);
  backdrop-filter: blur(8px);
  color: var(--vti-amber-warm);
  font-size: 11px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--vti-radius-full);
  border: 1px solid rgba(229, 147, 36, 0.3);
  display: flex;
  align-items: center;
  gap: 6px;
}

.vti-quick-install-content h3 {
  font-size: var(--vti-text-xl);
  font-weight: 800;
  color: #ffffff;
  margin: 0 0 10px;
  line-height: var(--vti-leading-heading);
}

.vti-quick-install-content p {
  color: var(--vti-text-on-dark-muted);
  font-size: var(--vti-text-base);
  line-height: 1.6;
  margin: 0 0 16px;
}

/* --- CÁCH HOẠT ĐỘNG (HEIMDALL-STYLE SCROLL-STORYTELLING) --- */
.vti-story-section {
  background-color: var(--vti-navy-dark) !important;
  color: var(--vti-text-on-dark) !important;
  padding: clamp(60px, 8vw, 100px) 0;
  position: relative;
}

.vti-story-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(32px, 5vw, 64px);
  align-items: start;
  margin-top: clamp(32px, 5vw, 56px);
}

@media (max-width: 900px) {
  .vti-story-layout {
    grid-template-columns: 1fr;
  }
}

/* Khung hình minh họa dính (Sticky Stage) */
.vti-story-sticky {
  position: sticky;
  top: 100px;
  background: var(--vti-navy-surface);
  border: 1px solid var(--vti-border-dark);
  border-radius: var(--vti-radius-lg);
  aspect-ratio: 4 / 3;
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
}

@media (max-width: 900px) {
  .vti-story-sticky {
    display: none; /* Mobile stacks visuals inside steps */
  }
}

.vti-story-scene {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  visibility: hidden;
  transform: scale(0.96);
  transition: opacity 0.45s ease, transform 0.45s ease, visibility 0.45s;
}

.vti-story-scene.active {
  opacity: 1;
  visibility: visible;
  transform: scale(1);
}

/* Danh sách 4 bước kể chuyện */
.vti-story-steps {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: clamp(32px, 5vw, 64px);
}

.vti-story-step {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--vti-border-dark);
  border-radius: var(--vti-radius-md);
  padding: clamp(24px, 4vw, 36px);
  transition: all var(--vti-transition-base);
  position: relative;
}

.vti-story-step.active,
.vti-story-step:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(56, 189, 248, 0.5);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.3);
}

.vti-step-num {
  font-size: var(--vti-text-2xl);
  font-weight: 800;
  color: var(--vti-cyan-cool);
  font-family: inherit;
  line-height: 1;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.vti-step-badge {
  font-size: 11px;
  font-weight: 700;
  color: var(--vti-amber-warm);
  background: rgba(229, 147, 36, 0.15);
  padding: 4px 10px;
  border-radius: var(--vti-radius-full);
}

.vti-story-step h3 {
  font-size: var(--vti-text-xl);
  font-weight: 700;
  color: #ffffff;
  margin: 0 0 12px;
}

.vti-story-step p {
  font-size: var(--vti-text-base);
  color: var(--vti-text-on-dark-muted);
  line-height: 1.6;
  margin: 0;
}

/* Mobile visual frame inside each step */
.vti-step-mobile-visual {
  display: none;
  margin-top: 18px;
  border-radius: var(--vti-radius-sm);
  overflow: hidden;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--vti-border-dark);
  aspect-ratio: 16 / 10;
}

@media (max-width: 900px) {
  .vti-step-mobile-visual {
    display: flex;
    align-items: center;
    justify-content: center;
  }
}

/* 3 Thẻ nền tảng cuối khối Cách hoạt động */
.vti-platform-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--vti-space-6);
  margin-top: clamp(48px, 6vw, 72px);
}

@media (max-width: 900px) {
  .vti-platform-cards {
    grid-template-columns: 1fr;
  }
}

.vti-platform-card {
  background: var(--vti-navy-surface);
  border: 1px solid var(--vti-border-dark);
  border-radius: var(--vti-radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--vti-transition-fast);
}

.vti-platform-card:hover {
  border-color: var(--vti-cyan-cool);
  transform: translateY(-2px);
}

.vti-platform-card h4 {
  font-size: var(--vti-text-lg);
  font-weight: 700;
  color: #ffffff;
  margin: 0 0 10px;
}

.vti-platform-card p {
  font-size: var(--vti-text-sm);
  color: var(--vti-text-on-dark-muted);
  line-height: 1.55;
  margin: 0 0 16px;
  flex: 1;
}

.vti-platform-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: var(--vti-text-sm);
  font-weight: 700;
  color: var(--vti-amber-warm);
  text-decoration: none;
  transition: gap var(--vti-transition-fast);
}

.vti-platform-link:hover {
  gap: 10px;
  color: #ffffff;
}

/* Dải chip Tích hợp & Giao thức */
.vti-proto-strip {
  margin-top: clamp(32px, 4vw, 48px);
  padding: 20px 24px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--vti-border-dark);
  border-radius: var(--vti-radius-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.vti-proto-chips {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.vti-proto-note {
  font-size: 12px;
  color: var(--vti-text-on-dark-muted);
  margin: 0;
}

/* --- KHỐI GIẢI PHÁP (6 TABS HEIMDALL STYLE + 6 NGÀNH) --- */
.vti-solutions-section {
  background-color: var(--vti-navy-dark) !important;
  color: var(--vti-text-on-dark) !important;
  padding: clamp(60px, 8vw, 100px) 0;
  border-top: 1px solid var(--vti-border-dark);
  position: relative;
}

.vti-solution-panel {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(32px, 5vw, 56px);
  align-items: center;
  background: var(--vti-navy-surface);
  border: 1px solid var(--vti-border-dark);
  border-radius: var(--vti-radius-lg);
  padding: clamp(24px, 4vw, 48px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.35);
}

@media (max-width: 900px) {
  .vti-solution-panel {
    grid-template-columns: 1fr;
  }
}

.vti-solution-media {
  border-radius: var(--vti-radius-md);
  overflow: hidden;
  border: 1px solid var(--vti-border-dark);
  aspect-ratio: 16 / 10;
  background: rgba(0, 0, 0, 0.2);
}

.vti-solution-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--vti-transition-base);
}

.vti-solution-panel:hover .vti-solution-media img {
  transform: scale(1.02);
}

.vti-solution-info h3 {
  font-size: var(--vti-text-2xl);
  font-weight: 800;
  color: #ffffff;
  margin: 8px 0 14px;
}

.vti-solution-info p {
  font-size: var(--vti-text-base);
  color: var(--vti-text-on-dark-muted);
  line-height: 1.6;
  margin: 0 0 20px;
}

/* Hàng chip 6 ngành công nghiệp */
.vti-industry-strip {
  margin-top: clamp(40px, 6vw, 64px);
  text-align: center;
}

.vti-industry-strip-title {
  font-size: var(--vti-text-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--vti-text-on-dark-muted);
  font-weight: 700;
  margin-bottom: 16px;
}

.vti-industry-chips-grid {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
}

.vti-industry-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--vti-border-dark);
  padding: 8px 16px;
  border-radius: var(--vti-radius-full);
  color: #e2e8f0;
  font-size: var(--vti-text-sm);
  font-weight: 600;
  transition: all var(--vti-transition-fast);
}

.vti-industry-pill:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--vti-amber-warm);
  color: #ffffff;
}

/* Accordion */
.vti-accordion-item {
  border: 1px solid var(--vti-border);
  border-radius: var(--vti-radius-sm);
  margin-bottom: 12px;
  overflow: hidden;
  background: var(--vti-bg-surface);
}

.vti-accordion-header {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  background: none;
  border: none;
  text-align: left;
  font-family: inherit;
  font-size: var(--vti-text-base);
  font-weight: 600;
  color: var(--vti-text-ink);
  cursor: pointer;
}

.vti-accordion-icon {
  width: 20px;
  height: 20px;
  transition: transform var(--vti-transition-fast);
}

.vti-accordion-item.open .vti-accordion-icon {
  transform: rotate(180deg);
}

.vti-accordion-content {
  display: none;
  padding: 0 24px 20px;
  color: var(--vti-text-muted);
  font-size: var(--vti-text-sm);
  line-height: var(--vti-leading-body);
}

.vti-accordion-item.open .vti-accordion-content {
  display: block;
}

/* --- 10. LOGO STRIP (DẢI ĐỐI TÁC XÁM ĐỒNG NHẤT) --- */
.vti-logo-strip-wrap {
  padding: var(--vti-space-8) 0;
  border-top: 1px solid var(--vti-border-dark);
  border-bottom: 1px solid var(--vti-border-dark);
  overflow: hidden;
}

.vti-logo-strip-title {
  text-align: center;
  font-size: var(--vti-text-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--vti-text-on-dark-muted);
  margin-bottom: var(--vti-space-6);
  font-weight: 600;
}

.vti-logo-strip {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(24px, 4vw, 48px);
  flex-wrap: wrap;
}

.vti-partner-logo {
  height: 36px;
  width: auto;
  max-width: 140px;
  object-fit: contain;
  filter: grayscale(100%) opacity(0.55);
  transition: all var(--vti-transition-base);
}

.vti-partner-logo:hover {
  filter: grayscale(0%) opacity(1);
  transform: scale(1.05);
}

/* --- 11. FORM FIELDS (TRƯỜNG NHẬP LIỆU B2B) --- */
.vti-form-group {
  margin-bottom: var(--vti-space-5);
}

.vti-label {
  display: block;
  font-size: var(--vti-text-sm);
  font-weight: 600;
  margin-bottom: 8px;
  color: inherit;
}

.vti-input,
.vti-textarea,
.vti-select {
  width: 100%;
  padding: 12px 16px;
  font-family: inherit;
  font-size: var(--vti-text-sm);
  border-radius: var(--vti-radius-sm);
  border: 1px solid var(--vti-border-dark);
  background: rgba(255, 255, 255, 0.05);
  color: #fff;
  transition: all var(--vti-transition-fast);
}

.vti-input:focus,
.vti-textarea:focus {
  outline: none;
  border-color: var(--vti-amber-warm);
  box-shadow: 0 0 0 3px rgba(229, 147, 36, 0.2);
}

/* --- 12. SECTION HEADERS --- */
.vti-section-header {
  margin-bottom: clamp(40px, 6vw, 64px);
}

.vti-section-header.text-center {
  text-align: center;
}

.vti-eyebrow {
  display: inline-block;
  font-size: var(--vti-text-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 700;
  color: var(--vti-amber-warm);
  margin-bottom: 8px;
}

.vti-h2 {
  font-size: var(--vti-text-3xl);
  font-weight: 800;
  line-height: var(--vti-leading-title);
  margin: 0 0 16px;
  color: inherit;
}

.vti-lead {
  font-size: var(--vti-text-lg);
  line-height: var(--vti-leading-heading);
  max-width: 680px;
  margin: 0;
  color: var(--vti-text-muted);
}

.vti-section-header.text-center .vti-lead {
  margin-left: auto;
  margin-right: auto;
}

/* --- 13. MEDIA VIEWER & 3D CONTAINER --- */
.vti-viewer-wrap {
  width: 100%;
  aspect-ratio: 4 / 3;
  position: relative;
  border-radius: var(--vti-radius-md);
  background: radial-gradient(circle at 50% 50%, rgba(255, 255, 255, 0.05) 0%, rgba(0, 0, 0, 0.2) 100%);
  border: 1px solid var(--vti-border-dark);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.vti-viewer-canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.vti-viewer-poster {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 32px;
  pointer-events: none;
}

.vti-viewer-badge {
  position: absolute;
  top: 14px;
  left: 14px;
  background: rgba(7, 21, 36, 0.75);
  backdrop-filter: blur(8px);
  color: var(--vti-text-on-dark-muted);
  font-size: 11px;
  padding: 4px 10px;
  border-radius: var(--vti-radius-full);
  border: 1px solid var(--vti-border-dark);
  display: flex;
  align-items: center;
  gap: 6px;
}

.vti-viewer-hint {
  position: absolute;
  bottom: 14px;
  right: 14px;
  background: rgba(7, 21, 36, 0.75);
  backdrop-filter: blur(8px);
  color: var(--vti-text-on-dark-muted);
  font-size: 11px;
  padding: 4px 10px;
  border-radius: var(--vti-radius-full);
  border: 1px solid var(--vti-border-dark);
  pointer-events: none;
}

/* Hotspot Pin trên 3D */
.vti-hotspots-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 15;
}

.vti-hotspot {
  position: absolute;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--vti-amber-warm);
  border: 2px solid #ffffff;
  cursor: pointer;
  box-shadow: 0 0 16px rgba(229, 147, 36, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 20;
  pointer-events: auto;
  transition: transform var(--vti-transition-fast), box-shadow var(--vti-transition-fast);
  padding: 0;
}

.vti-hotspot:hover,
.vti-hotspot.active {
  transform: translate(-50%, -50%) scale(1.18) !important;
  box-shadow: 0 0 20px rgba(229, 147, 36, 0.95);
  border-color: #ffffff;
}

.vti-hotspot::after {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #071524;
  transition: background-color var(--vti-transition-fast);
}

.vti-hotspot:hover::after,
.vti-hotspot.active::after {
  background: #ffffff;
}

/* Tooltip Popover của Hotspot */
.vti-hotspot-popover {
  position: absolute;
  bottom: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%);
  width: max-content;
  max-width: 240px;
  background: rgba(7, 21, 36, 0.96);
  backdrop-filter: blur(12px);
  border: 1px solid var(--vti-border-dark);
  border-radius: var(--vti-radius-md);
  padding: 10px 14px;
  color: #ffffff;
  text-align: left;
  pointer-events: auto;
  opacity: 0;
  visibility: hidden;
  transition: all var(--vti-transition-fast);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.6);
  z-index: 30;
}

.vti-hotspot-popover::after {
  content: "";
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border-width: 6px;
  border-style: solid;
  border-color: rgba(7, 21, 36, 0.96) transparent transparent transparent;
}

.vti-hotspot.active .vti-hotspot-popover,
.vti-hotspot:hover .vti-hotspot-popover {
  opacity: 1;
  visibility: visible;
  bottom: calc(100% + 14px);
}

.vti-hotspot-title {
  font-size: var(--vti-text-xs);
  font-weight: 700;
  color: var(--vti-amber-warm);
  margin-bottom: 4px;
}

.vti-hotspot-detail {
  font-size: 11px;
  line-height: 1.45;
  color: var(--vti-text-on-dark-muted);
  margin: 0;
}

/* Tiến trình nạp 3D */
.vti-viewer-progress {
  position: absolute;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: var(--vti-gradient-heat);
  z-index: 25;
  transition: width 0.3s ease;
}

/* Nút nạp 3D trên mobile / Save-Data */
.vti-viewer-load-btn {
  position: absolute;
  z-index: 20;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(7, 21, 36, 0.85);
  backdrop-filter: blur(10px);
  color: #ffffff;
  border: 1px solid var(--vti-amber-warm);
  padding: 10px 18px;
  border-radius: var(--vti-radius-full);
  font-size: var(--vti-text-sm);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--vti-transition-fast);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

.vti-viewer-load-btn:hover {
  background: var(--vti-amber-warm);
  color: var(--vti-navy-dark);
}

/* Nút chuyển chế độ 3D / Ảnh thực tế */
.vti-viewer-mode-toggle {
  position: absolute;
  bottom: 12px;
  left: 12px;
  background: rgba(7, 21, 36, 0.75);
  backdrop-filter: blur(8px);
  color: var(--vti-text-on-dark-muted);
  font-size: 11px;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: var(--vti-radius-full);
  border: 1px solid var(--vti-border-dark);
  cursor: pointer;
  z-index: 20;
  transition: all var(--vti-transition-fast);
}

.vti-viewer-mode-toggle:hover {
  background: rgba(255, 255, 255, 0.12);
  color: #ffffff;
  border-color: var(--vti-amber-warm);
}

/* Carousel ảnh nhỏ dưới Viewer */
.vti-product-gallery {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 14px;
  overflow-x: auto;
  padding-bottom: 4px;
  scrollbar-width: none;
}

.vti-gallery-thumb {
  width: 60px;
  height: 60px;
  border-radius: var(--vti-radius-sm);
  border: 1px solid var(--vti-border-dark);
  background: rgba(255, 255, 255, 0.03);
  padding: 4px;
  cursor: pointer;
  transition: all var(--vti-transition-fast);
  object-fit: contain;
  flex-shrink: 0;
}

.vti-gallery-thumb:hover,
.vti-gallery-thumb.active {
  border-color: var(--vti-amber-warm);
  background: rgba(255, 255, 255, 0.08);
  transform: translateY(-2px);
}

/* Khối so sánh TS-22 và TS-26 (Dewesoft Style Side-by-Side) */
.vti-comp-section {
  margin-top: var(--vti-space-12);
  text-align: center;
}

.vti-comp-toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--vti-border-dark);
  color: #ffffff;
  font-family: inherit;
  font-size: var(--vti-text-base);
  font-weight: 600;
  padding: 14px 28px;
  border-radius: var(--vti-radius-full);
  cursor: pointer;
  transition: all var(--vti-transition-fast);
}

.vti-comp-toggle-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--vti-amber-warm);
  color: var(--vti-amber-warm);
}

.vti-comp-collapse {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.45s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s ease;
  opacity: 0;
  margin-top: 0;
}

.vti-comp-collapse.open {
  max-height: 1200px;
  opacity: 1;
  margin-top: var(--vti-space-8);
}

.vti-comp-card {
  background: var(--vti-navy-surface);
  border: 1px solid var(--vti-border-dark);
  border-radius: var(--vti-radius-lg);
  padding: clamp(20px, 3vw, 36px);
  text-align: left;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.4);
}

.vti-comp-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--vti-text-sm);
  background: transparent !important;
}

.vti-comp-table tr,
.vti-comp-table tbody tr,
.vti-comp-table tbody tr:nth-child(even),
.vti-comp-table tbody tr:nth-child(odd) {
  background: transparent !important;
}

.vti-comp-table th,
.vti-comp-table td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--vti-border-dark) !important;
  color: #cbd5e1 !important;
  background: transparent !important;
}

.vti-comp-table thead th {
  font-size: var(--vti-text-base);
  font-weight: 700;
  color: #ffffff !important;
  background: rgba(255, 255, 255, 0.04) !important;
  text-align: left;
}

.vti-comp-table thead th:first-child {
  width: 32%;
}

.vti-comp-table tbody tr:hover {
  background: rgba(255, 255, 255, 0.04) !important;
}

.vti-comp-table tbody tr.vti-diff-row,
.vti-comp-table tbody tr.vti-diff-row td {
  background: rgba(229, 147, 36, 0.08) !important;
}

.vti-comp-table tbody tr.vti-diff-row td:first-child {
  font-weight: 700;
  color: var(--vti-amber-warm) !important;
}

.vti-diff-badge {
  display: inline-block;
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  background: rgba(229, 147, 36, 0.25);
  color: var(--vti-amber-warm);
  padding: 3px 8px;
  border-radius: var(--vti-radius-full);
  margin-left: 6px;
  vertical-align: middle;
}

/* --- 14. FOOTER --- */
.vti-footer {
  background: #050e18;
  color: #94a3b8;
  padding: var(--vti-space-20) 0 var(--vti-space-8);
  border-top: 1px solid var(--vti-border-dark);
  position: relative;
  overflow: hidden;
}

.vti-footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--vti-space-8);
  margin-bottom: var(--vti-space-16);
  position: relative;
  z-index: 2;
}

.vti-footer-title {
  color: #fff;
  font-size: var(--vti-text-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 16px;
}

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

.vti-footer-list a {
  color: #94a3b8;
  text-decoration: none;
  font-size: var(--vti-text-sm);
  transition: color var(--vti-transition-fast);
}

.vti-footer-list a:hover {
  color: #fff;
}

.vti-footer-bottom {
  border-top: 1px solid var(--vti-border-dark);
  padding-top: var(--vti-space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: var(--vti-text-xs);
  flex-wrap: wrap;
  gap: 16px;
  position: relative;
  z-index: 2;
}

/* Chữ VTI khổng lồ mờ chìm nghệ thuật cuối footer (Heimdall Style) */
.vti-footer-watermark {
  position: absolute;
  bottom: -40px;
  right: -20px;
  font-size: clamp(140px, 22vw, 280px);
  font-weight: 900;
  color: rgba(255, 255, 255, 0.02);
  line-height: 1;
  pointer-events: none;
  user-select: none;
  letter-spacing: -0.05em;
  z-index: 1;
}

/* --- 15. RESPONSIVE BREAKPOINTS --- */
@media (max-width: 992px) {
  .vti-product-panel,
  .vti-product-panel.reverse {
    grid-template-columns: 1fr;
  }
  .vti-footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .vti-nav-menu,
  .vti-header-actions .vti-btn {
    display: none;
  }
  .vti-mobile-toggle {
    display: block;
  }
  .vti-footer-grid {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   PHASE 1 SPECIFIC STYLES: HERO, CANVAS SCENE, STATS, MARQUEE & DRAWER
   ========================================================================== */

/* --- 16. HERO KIỂU HEIMDALL (100svh) --- */
.vti-hero-heimdall {
  position: relative;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background-color: var(--vti-navy-dark);
  color: var(--vti-text-on-dark);
  overflow: hidden;
  padding-top: 72px; /* Dành chỗ cho sticky header */
}

.vti-hero-canvas-wrap {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

#vti-thermal-canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.vti-hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(7, 21, 36, 0.45) 0%, rgba(7, 21, 36, 0.82) 75%, var(--vti-navy-dark) 100%),
              radial-gradient(circle at 75% 35%, rgba(229, 147, 36, 0.12) 0%, transparent 60%);
  z-index: 2;
  pointer-events: none;
}

.vti-hero-body {
  position: relative;
  z-index: 3;
  padding: clamp(48px, 9vh, 110px) 0 clamp(32px, 5vh, 60px);
  max-width: 880px;
}

.vti-hero-h1 {
  font-size: var(--vti-text-4xl);
  font-weight: 800;
  line-height: var(--vti-leading-title);
  color: #ffffff;
  margin: 16px 0 20px;
  letter-spacing: -0.02em;
  overflow-wrap: break-word;
  word-break: normal;
}

@media (max-width: 480px) {
  .vti-hero-h1 {
    font-size: clamp(1.6rem, 7.5vw, 1.95rem);
    line-height: 1.25;
  }
}

.vti-hero-lead {
  font-size: clamp(1.05rem, 1.2vw + 0.6rem, 1.25rem);
  line-height: var(--vti-leading-heading);
  color: #cbd5e1;
  margin-bottom: 34px;
  max-width: 740px;
}

.vti-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
}

/* Nút điều khiển cảnh nhiệt Play / Pause */
.vti-canvas-control {
  position: absolute;
  bottom: 58px;
  right: var(--vti-container-padding);
  z-index: 4;
  background: rgba(7, 21, 36, 0.8);
  backdrop-filter: blur(8px);
  border: 1px solid var(--vti-border-dark);
  color: #94a3b8;
  padding: 6px 14px;
  border-radius: var(--vti-radius-full);
  font-size: var(--vti-text-xs);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  transition: all var(--vti-transition-fast);
}

.vti-canvas-control:hover {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.35);
}

/* Hero Bottom Ticker (Dòng chữ lớn chạy ngang) */
.vti-hero-ticker {
  position: relative;
  z-index: 3;
  width: 100%;
  overflow: hidden;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(7, 21, 36, 0.7);
  backdrop-filter: blur(6px);
  padding: 12px 0;
  white-space: nowrap;
}

.vti-ticker-track {
  display: inline-flex;
  gap: 48px;
  font-size: clamp(0.75rem, 1vw, 0.9rem);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: rgba(255, 255, 255, 0.45);
  animation: vti-ticker-scroll 30s linear infinite;
}

@keyframes vti-ticker-scroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* --- 17. STATS ROW (4 SỐ LỚN NGAY DƯỚI HERO) --- */
.vti-stats-section {
  background-color: var(--vti-navy-dark);
  padding: clamp(48px, 6vw, 72px) 0 clamp(40px, 5vw, 60px);
  border-bottom: 1px solid var(--vti-border-dark);
  position: relative;
  z-index: 5;
}

.vti-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

@media (max-width: 992px) {
  .vti-stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 560px) {
  .vti-stats-grid {
    grid-template-columns: 1fr;
  }
}

/* --- 18. DẢI ĐỐI TÁC MONOCHROME MARQUEE --- */
.vti-partners-band {
  background-color: var(--vti-navy-dark);
  padding: 44px 0 52px;
  border-bottom: 1px solid var(--vti-border-dark);
  overflow: hidden;
  position: relative;
  z-index: 5;
}

.vti-partners-band-title {
  text-align: center;
  font-size: var(--vti-text-xs);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: #94a3b8;
  font-weight: 700;
  margin-bottom: 28px;
}

.vti-marquee-wrap {
  width: 100%;
  overflow: hidden;
  position: relative;
  mask-image: linear-gradient(90deg, transparent 0%, black 12%, black 88%, transparent 100%);
  -webkit-mask-image: linear-gradient(90deg, transparent 0%, black 12%, black 88%, transparent 100%);
}

.vti-marquee-track {
  display: flex;
  align-items: center;
  gap: clamp(40px, 6vw, 72px);
  width: max-content;
  animation: vti-marquee-scroll 35s linear infinite;
}

.vti-marquee-track:hover {
  animation-play-state: paused;
}

.vti-marquee-item {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.vti-marquee-item img {
  height: 36px;
  width: auto;
  max-width: 140px;
  object-fit: contain;
  filter: grayscale(100%) opacity(0.52);
  transition: all var(--vti-transition-base);
}

.vti-marquee-item:hover img {
  filter: grayscale(0%) opacity(1);
  transform: scale(1.08);
}

@keyframes vti-marquee-scroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

@media (prefers-reduced-motion: reduce) {
  .vti-marquee-track {
    animation: none !important;
    overflow-x: auto;
  }
}

/* --- 19. MOBILE DRAWER NAVIGATION --- */
.vti-mobile-drawer {
  position: fixed;
  inset: 0;
  background: var(--vti-navy-dark);
  z-index: var(--vti-z-modal);
  padding: 24px;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  transform: translateX(100%);
  transition: transform var(--vti-transition-slow);
}

.vti-mobile-drawer.open {
  transform: translateX(0);
}

.vti-drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--vti-border-dark);
}

.vti-drawer-close {
  background: transparent;
  border: 1px solid var(--vti-border-dark);
  color: #fff;
  border-radius: var(--vti-radius-sm);
  padding: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.vti-drawer-menu {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.vti-drawer-acc-item {
  border-bottom: 1px solid var(--vti-border-dark);
  padding: 14px 0;
}

.vti-drawer-acc-btn {
  width: 100%;
  background: none;
  border: none;
  color: #fff;
  font-family: inherit;
  font-size: var(--vti-text-base);
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  padding: 0;
}

.vti-drawer-acc-panel {
  display: none;
  padding: 14px 0 4px 12px;
  flex-direction: column;
  gap: 12px;
}

.vti-drawer-acc-item.open .vti-drawer-acc-panel {
  display: flex;
}

.vti-drawer-acc-panel a {
  color: #cbd5e1;
  text-decoration: none;
  font-size: var(--vti-text-sm);
  padding: 4px 0;
}

.vti-drawer-link-direct {
  color: #fff;
  text-decoration: none;
  font-size: var(--vti-text-base);
  font-weight: 600;
  display: block;
  padding: 14px 0;
  border-bottom: 1px solid var(--vti-border-dark);
}

.vti-drawer-actions {
  margin-top: 32px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

@media (prefers-reduced-motion: reduce) {
  .vti-ticker-track,
  .vti-marquee-track {
    animation: none;
  }
}

/* ==========================================================================
   PHASE 4: CASES, STANDARDS, WHY VTI, ARTICLES, CONTACT & FOOTER
   ========================================================================== */

/* --- 1. KẾT QUẢ THỰC TẾ & DỰ ÁN TIÊU BIỂU (#cases) --- */
.vti-cases-section {
  background-color: var(--vti-navy-surface) !important;
  color: var(--vti-text-on-dark) !important;
  padding: clamp(64px, 8vw, 100px) 0;
  position: relative;
}

.vti-cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--vti-space-6);
  margin-top: clamp(32px, 4vw, 48px);
}

@media (max-width: 960px) {
  .vti-cases-grid {
    grid-template-columns: 1fr;
  }
}

.vti-case-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--vti-border-dark);
  border-radius: var(--vti-radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform var(--vti-transition-base), border-color var(--vti-transition-base), box-shadow var(--vti-transition-base);
}

.vti-case-card:hover {
  transform: translateY(-4px);
  border-color: var(--vti-cyan-cool);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.4);
}

.vti-case-media {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: #061524;
}

.vti-case-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--vti-transition-base);
}

.vti-case-card:hover .vti-case-media img {
  transform: scale(1.04);
}

.vti-case-tag {
  position: absolute;
  top: 14px;
  left: 14px;
  background: rgba(7, 21, 36, 0.9);
  backdrop-filter: blur(8px);
  border: 1px solid var(--vti-border-dark);
  color: var(--vti-cyan-cool);
  font-size: 11px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--vti-radius-full);
  text-transform: uppercase;
}

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

.vti-case-metric-box {
  background: rgba(229, 147, 36, 0.08);
  border: 1px solid rgba(229, 147, 36, 0.25);
  border-radius: var(--vti-radius-md);
  padding: 12px 16px;
  margin-bottom: 18px;
}

.vti-case-metric-val {
  font-size: clamp(1.75rem, 2.5vw, 2.25rem);
  font-weight: 800;
  color: var(--vti-amber-warm);
  line-height: 1.1;
  display: block;
}

.vti-case-metric-label {
  font-size: 11px;
  color: var(--vti-text-on-dark-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-top: 4px;
  display: block;
}

.vti-case-title {
  font-size: var(--vti-text-lg);
  font-weight: 700;
  color: #ffffff;
  margin: 0 0 12px;
  line-height: 1.4;
}

.vti-case-desc {
  font-size: var(--vti-text-sm);
  color: var(--vti-text-on-dark-muted);
  line-height: 1.6;
  margin: 0 0 18px;
  flex-grow: 1;
}

.vti-case-link {
  font-size: var(--vti-text-sm);
  font-weight: 700;
  color: var(--vti-cyan-cool);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap var(--vti-transition-fast);
}

.vti-case-link:hover {
  gap: 10px;
  color: #ffffff;
}

/* Dải dự án gọn bên dưới Case Studies */
.vti-projects-strip {
  margin-top: clamp(48px, 6vw, 72px);
  padding: clamp(24px, 4vw, 36px);
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--vti-border-dark);
  border-radius: var(--vti-radius-lg);
}

.vti-projects-strip-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 24px;
}

.vti-projects-strip-title {
  font-size: var(--vti-text-xl);
  font-weight: 700;
  color: #ffffff;
  margin: 0;
}

.vti-projects-mini-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

@media (max-width: 1024px) {
  .vti-projects-mini-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .vti-projects-mini-grid {
    grid-template-columns: 1fr;
  }
}

.vti-project-mini-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--vti-border-dark);
  border-radius: var(--vti-radius-md);
  padding: 16px;
  display: flex;
  flex-direction: column;
  transition: all var(--vti-transition-fast);
}

.vti-project-mini-card:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: var(--vti-cyan-cool);
}

.vti-project-mini-badge {
  font-size: 11px;
  font-weight: 700;
  color: var(--vti-amber-warm);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.vti-project-mini-card h4 {
  font-size: var(--vti-text-sm);
  font-weight: 700;
  color: #ffffff;
  margin: 0 0 8px;
  line-height: 1.4;
}

.vti-project-mini-card p {
  font-size: 12px;
  color: var(--vti-text-on-dark-muted);
  line-height: 1.5;
  margin: 0;
}

/* --- 2. DẢI TIÊU CHUẨN MỎNG (STANDARDS STRIP) --- */
.vti-standards-band {
  background: #061626;
  border-top: 1px solid var(--vti-border-dark);
  border-bottom: 1px solid var(--vti-border-dark);
  padding: 24px 0;
}

.vti-standards-layout {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.vti-standards-chips {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.vti-std-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(56, 189, 248, 0.3);
  padding: 8px 16px;
  border-radius: var(--vti-radius-full);
  color: #ffffff;
  font-size: var(--vti-text-sm);
  font-weight: 600;
  text-decoration: none;
  transition: all var(--vti-transition-fast);
}

.vti-std-chip:hover {
  background: rgba(56, 189, 248, 0.15);
  border-color: var(--vti-cyan-cool);
  color: var(--vti-cyan-cool);
}

.vti-std-legal-note {
  font-size: 12px;
  color: var(--vti-text-on-dark-muted);
  margin: 0;
  max-width: 440px;
  line-height: 1.45;
}

/* --- 3. VÌ SAO CHỌN VTI (#why-vti) --- */
.vti-why-section {
  background-color: var(--vti-navy-dark) !important;
  color: var(--vti-text-on-dark) !important;
  padding: clamp(64px, 8vw, 100px) 0;
  position: relative;
}

.vti-why-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--vti-space-6);
  margin-top: clamp(32px, 4vw, 48px);
}

@media (max-width: 1024px) {
  .vti-why-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .vti-why-grid {
    grid-template-columns: 1fr;
  }
}

.vti-why-card {
  background: var(--vti-navy-surface);
  border: 1px solid var(--vti-border-dark);
  border-radius: var(--vti-radius-lg);
  padding: clamp(24px, 3vw, 32px);
  display: flex;
  flex-direction: column;
  transition: all var(--vti-transition-base);
}

.vti-why-card:hover {
  border-color: var(--vti-amber-warm);
  transform: translateY(-3px);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.4);
}

.vti-why-icon-wrap {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(229, 147, 36, 0.12);
  border: 1px solid rgba(229, 147, 36, 0.3);
  color: var(--vti-amber-warm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.vti-why-card h3 {
  font-size: var(--vti-text-lg);
  font-weight: 700;
  color: #ffffff;
  margin: 0 0 12px;
  line-height: 1.35;
}

.vti-why-card p {
  font-size: var(--vti-text-sm);
  color: var(--vti-text-on-dark-muted);
  line-height: 1.6;
  margin: 0;
}

/* --- 4. BÀI VIẾT & TRI THỨC CHUYÊN SÂU (#resources) --- */
.vti-articles-section {
  background-color: var(--vti-navy-surface) !important;
  color: var(--vti-text-on-dark) !important;
  padding: clamp(64px, 8vw, 100px) 0;
  position: relative;
}

.vti-articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--vti-space-6);
  margin-top: clamp(32px, 4vw, 48px);
}

@media (max-width: 960px) {
  .vti-articles-grid {
    grid-template-columns: 1fr;
  }
}

.vti-article-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--vti-border-dark);
  border-radius: var(--vti-radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all var(--vti-transition-base);
}

.vti-article-card:hover {
  transform: translateY(-4px);
  border-color: var(--vti-cyan-cool);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.4);
}

.vti-article-media {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: #061524;
}

.vti-article-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--vti-transition-base);
}

.vti-article-card:hover .vti-article-media img {
  transform: scale(1.05);
}

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

.vti-article-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--vti-cyan-cool);
  margin-bottom: 10px;
}

.vti-article-title {
  font-size: var(--vti-text-base);
  font-weight: 700;
  color: #ffffff;
  margin: 0 0 12px;
  line-height: 1.45;
}

.vti-article-desc {
  font-size: var(--vti-text-sm);
  color: var(--vti-text-on-dark-muted);
  line-height: 1.6;
  margin: 0 0 20px;
  flex-grow: 1;
}

.vti-article-meta {
  font-size: 12px;
  color: #64748b;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--vti-border-dark);
  padding-top: 14px;
}

/* --- 5. LIÊN HỆ & FORM BÁO GIÁ (#contact) --- */
.vti-contact-section {
  background: var(--vti-navy-dark) !important;
  color: var(--vti-text-on-dark) !important;
  padding: clamp(64px, 8vw, 100px) 0;
  border-top: 1px solid var(--vti-border-dark);
  position: relative;
}

.vti-contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: clamp(36px, 6vw, 72px);
  align-items: start;
}

@media (max-width: 960px) {
  .vti-contact-layout {
    grid-template-columns: 1fr;
  }
}

.vti-contact-info h2 {
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  font-weight: 800;
  color: #ffffff;
  line-height: 1.2;
  margin: 0 0 18px;
}

.vti-contact-info p {
  font-size: var(--vti-text-base);
  color: var(--vti-text-on-dark-muted);
  line-height: 1.65;
  margin: 0 0 32px;
}

.vti-direct-channels {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin-bottom: 36px;
}

.vti-channel-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.vti-channel-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.25);
  color: var(--vti-cyan-cool);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.vti-channel-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--vti-text-on-dark-muted);
  display: block;
  margin-bottom: 4px;
}

.vti-channel-val {
  font-size: var(--vti-text-base);
  font-weight: 700;
  color: #ffffff;
  text-decoration: none;
}

.vti-channel-val:hover {
  color: var(--vti-amber-warm);
}

/* 3 Cam kết dịch vụ */
.vti-commitments {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--vti-border-dark);
  border-radius: var(--vti-radius-md);
  padding: 20px 24px;
}

.vti-commitments-title {
  font-size: var(--vti-text-xs);
  font-weight: 700;
  text-transform: uppercase;
  color: var(--vti-amber-warm);
  letter-spacing: 0.05em;
  margin-bottom: 12px;
}

.vti-commitments-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: var(--vti-text-sm);
  color: #cbd5e1;
}

.vti-commitments-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  line-height: 1.5;
}

.vti-commitments-list svg {
  color: var(--vti-cyan-cool);
  flex-shrink: 0;
  margin-top: 3px;
}

/* Form Card */
.vti-form-card {
  background: var(--vti-navy-surface);
  border: 1px solid var(--vti-border-dark);
  border-radius: var(--vti-radius-lg);
  padding: clamp(28px, 4vw, 44px);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
}

.vti-form-card-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(229, 147, 36, 0.15);
  border: 1px solid rgba(229, 147, 36, 0.35);
  padding: 4px 12px;
  border-radius: var(--vti-radius-full);
  font-size: 11px;
  font-weight: 700;
  color: var(--vti-amber-warm);
  margin-bottom: 20px;
}

.vti-form-title {
  font-size: var(--vti-text-2xl);
  font-weight: 800;
  color: #ffffff;
  margin: 0 0 8px;
}

.vti-form-subtitle {
  font-size: var(--vti-text-sm);
  color: var(--vti-text-on-dark-muted);
  margin: 0 0 24px;
}

.vti-form-row-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

@media (max-width: 600px) {
  .vti-form-row-2 {
    grid-template-columns: 1fr;
  }
}

.vti-form-field {
  margin-bottom: 18px;
}

.vti-form-label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: #e2e8f0;
  margin-bottom: 6px;
}

.vti-form-input,
.vti-form-textarea {
  width: 100%;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--vti-border-dark);
  border-radius: var(--vti-radius-sm);
  padding: 12px 16px;
  color: #ffffff;
  font-family: inherit;
  font-size: var(--vti-text-sm);
  transition: all var(--vti-transition-fast);
  outline: none;
}

.vti-form-input:focus,
.vti-form-textarea:focus {
  border-color: var(--vti-cyan-cool);
  background: rgba(255, 255, 255, 0.08);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.2);
}

.vti-form-submit-btn {
  width: 100%;
  background: var(--vti-amber-warm);
  color: var(--vti-navy-dark);
  font-family: inherit;
  font-size: var(--vti-text-base);
  font-weight: 700;
  padding: 14px 24px;
  border: none;
  border-radius: var(--vti-radius-md);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: all var(--vti-transition-fast);
  margin-top: 8px;
}

.vti-form-submit-btn:hover {
  background: #f59e0b;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(229, 147, 36, 0.4);
}

.vti-form-status {
  margin-top: 14px;
  padding: 12px 16px;
  border-radius: var(--vti-radius-sm);
  font-size: 13px;
  display: none;
}

.vti-form-status.success {
  display: block;
  background: rgba(34, 197, 94, 0.15);
  border: 1px solid rgba(34, 197, 94, 0.4);
  color: #4ade80;
}

.vti-form-status.error {
  display: block;
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.4);
  color: #f87171;
}

/* --- 6. FOOTER (4-CỘT SITEMAP + WATERMARK "VTI") --- */
.vti-footer-modern {
  background: #040e1a !important;
  color: #94a3b8 !important;
  border-top: 1px solid var(--vti-border-dark);
  padding: clamp(64px, 8vw, 96px) 0 32px;
  position: relative;
  overflow: hidden;
}

.vti-footer-watermark {
  position: absolute;
  bottom: 10px;
  right: 4%;
  font-size: clamp(100px, 18vw, 220px);
  font-weight: 900;
  color: #ffffff;
  opacity: 0.02;
  line-height: 0.8;
  user-select: none;
  pointer-events: none;
  letter-spacing: -0.05em;
}

.vti-footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: clamp(32px, 5vw, 56px);
  margin-bottom: 56px;
  position: relative;
  z-index: 2;
}

@media (max-width: 960px) {
  .vti-footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 600px) {
  .vti-footer-grid {
    grid-template-columns: 1fr;
  }
}

.vti-foot-col h4 {
  font-size: var(--vti-text-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #ffffff;
  margin: 0 0 20px;
}

.vti-foot-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.vti-foot-links a {
  color: #94a3b8;
  text-decoration: none;
  font-size: var(--vti-text-sm);
  transition: color var(--vti-transition-fast);
}

.vti-foot-links a:hover {
  color: var(--vti-amber-warm);
}

.vti-footer-about p {
  font-size: var(--vti-text-sm);
  line-height: 1.65;
  color: #94a3b8;
  margin-top: 16px;
}

.vti-footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 12px;
  color: #64748b;
  position: relative;
  z-index: 2;
}

.vti-footer-bottom-links {
  display: flex;
  gap: 20px;
}

.vti-footer-bottom-links a {
  color: #64748b;
  text-decoration: none;
}

.vti-footer-bottom-links a:hover {
  color: #ffffff;
}

/* ==========================================================================
   SUBPAGES DESIGN SYSTEM (GIAI ĐOẠN 5: TRANG CON CHUYÊN SÂU)
   Chuẩn mực Dewesoft: Sub-nav dính, Spec grid, Highlights, Accordions
   ========================================================================== */

/* 1. Breadcrumb */
.vti-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: #64748b;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.vti-breadcrumb a {
  color: #94a3b8;
  text-decoration: none;
  transition: color var(--vti-transition-fast);
}

.vti-breadcrumb a:hover {
  color: var(--vti-amber-warm);
}

.vti-breadcrumb-sep {
  color: #475569;
  font-size: 11px;
}

.vti-breadcrumb-curr {
  color: #cbd5e1;
  font-weight: 600;
}

/* 2. Dewesoft Sticky Sub-Navigation */
.vti-subnav-sticky {
  position: sticky;
  top: 72px;
  z-index: 90;
  background: rgba(7, 21, 36, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--vti-border-dark);
  padding: 0;
  transition: top var(--vti-transition-fast);
}

.vti-subnav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  overflow-x: auto;
  scrollbar-width: none;
}

.vti-subnav-wrap::-webkit-scrollbar {
  display: none;
}

.vti-subnav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
  padding: 0;
  margin: 0;
  white-space: nowrap;
}

.vti-subnav-links a {
  display: inline-block;
  padding: 14px 16px;
  font-size: 13px;
  font-weight: 600;
  color: #94a3b8;
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: all var(--vti-transition-fast);
}

.vti-subnav-links a:hover,
.vti-subnav-links a.active {
  color: #ffffff;
  border-bottom-color: var(--vti-amber-warm);
}

.vti-subnav-cta {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

/* 3. Subpage Hero */
.vti-subpage-hero {
  background-color: var(--vti-navy-dark);
  background-image: radial-gradient(circle at 85% 25%, rgba(229, 147, 36, 0.14) 0%, rgba(14, 165, 233, 0.08) 40%, transparent 70%);
  color: var(--vti-text-on-dark);
  padding: clamp(48px, 6vw, 80px) 0 clamp(40px, 5vw, 64px);
  border-bottom: 1px solid var(--vti-border-dark);
  position: relative;
}

.vti-subpage-hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: clamp(32px, 5vw, 64px);
  align-items: center;
}

@media (max-width: 960px) {
  .vti-subpage-hero-grid {
    grid-template-columns: 1fr;
  }
}

.vti-subpage-hero h1 {
  font-size: clamp(1.65rem, 3.8vw, 3rem);
  font-weight: 800;
  color: #ffffff;
  line-height: 1.2;
  margin: 0 0 16px;
  letter-spacing: -0.02em;
  overflow-wrap: break-word;
  word-break: normal;
}

@media (max-width: 480px) {
  .vti-subpage-hero h1 {
    font-size: clamp(1.45rem, 7vw, 1.85rem);
    line-height: 1.24;
  }
}

.vti-subpage-hero-lead {
  font-size: clamp(1rem, 1.4vw, 1.15rem);
  color: var(--vti-text-on-dark-muted);
  line-height: 1.65;
  margin: 0 0 28px;
}

.vti-subpage-hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

.vti-subpage-hero-media {
  background: var(--vti-navy-surface);
  border: 1px solid var(--vti-border-dark);
  border-radius: var(--vti-radius-lg);
  padding: 24px;
  text-align: center;
  position: relative;
  box-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.5);
}

.vti-subpage-hero-media img {
  width: 100%;
  max-height: 380px;
  object-fit: contain;
  border-radius: var(--vti-radius-md);
  margin: 0 auto;
}

.vti-subpage-hero-media p {
  font-size: 12px;
  color: #94a3b8;
  margin-top: 12px;
  margin-bottom: 0;
}

/* 4. Highlights Grid (Dewesoft Key Features) */
.vti-highlights-section {
  padding: clamp(64px, 7vw, 96px) 0;
  background: var(--vti-bg-page);
  border-bottom: 1px solid var(--vti-border);
}

.vti-highlights-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 40px;
}

@media (max-width: 960px) {
  .vti-highlights-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .vti-highlights-grid {
    grid-template-columns: 1fr;
  }
}

.vti-highlight-card {
  background: #ffffff;
  border: 1px solid var(--vti-border);
  border-radius: var(--vti-radius-md);
  padding: 28px;
  display: flex;
  flex-direction: column;
  transition: transform var(--vti-transition-fast), box-shadow var(--vti-transition-fast);
}

.vti-highlight-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 28px -10px rgba(0, 40, 64, 0.1);
  border-color: rgba(229, 147, 36, 0.35);
}

.vti-highlight-metric {
  font-size: clamp(1.5rem, 2.2vw, 1.85rem);
  font-weight: 800;
  color: var(--vti-amber-warm);
  line-height: 1.1;
  margin-bottom: 10px;
  font-family: var(--vti-font-sans);
}

.vti-highlight-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--vti-text-ink);
  margin: 0 0 10px;
  line-height: 1.35;
}

.vti-highlight-card p {
  font-size: var(--vti-text-sm);
  color: var(--vti-text-muted);
  line-height: 1.6;
  margin: 0;
}

/* 5. Alternating Overview Sections */
.vti-overview-section {
  padding: clamp(64px, 7vw, 96px) 0;
  background: #ffffff;
  border-bottom: 1px solid var(--vti-border);
}

.vti-overview-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(36px, 5vw, 64px);
  align-items: center;
  margin-bottom: clamp(48px, 6vw, 80px);
}

.vti-overview-row:last-child {
  margin-bottom: 0;
}

.vti-overview-row.reverse {
  direction: rtl;
}

.vti-overview-row.reverse > * {
  direction: ltr;
}

@media (max-width: 900px) {
  .vti-overview-row,
  .vti-overview-row.reverse {
    grid-template-columns: 1fr;
    direction: ltr;
  }
}

.vti-overview-text h2 {
  font-size: clamp(1.6rem, 2.5vw, 2.25rem);
  font-weight: 800;
  color: var(--vti-text-ink);
  line-height: 1.25;
  margin: 0 0 16px;
}

.vti-overview-text p {
  font-size: var(--vti-text-base);
  color: var(--vti-text-muted);
  line-height: 1.65;
  margin: 0 0 20px;
}

.vti-overview-img-wrap {
  border-radius: var(--vti-radius-lg);
  overflow: hidden;
  border: 1px solid var(--vti-border);
  box-shadow: 0 16px 36px -12px rgba(0, 40, 64, 0.08);
  background: var(--vti-bg-alt);
}

.vti-overview-img-wrap img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

/* 6. Detailed Specs Table */
.vti-specs-section {
  padding: clamp(64px, 7vw, 96px) 0;
  background: var(--vti-bg-page);
  border-bottom: 1px solid var(--vti-border);
}

.vti-specs-table-wrap {
  background: #ffffff;
  border: 1px solid var(--vti-border);
  border-radius: var(--vti-radius-lg);
  overflow: hidden;
  box-shadow: 0 10px 30px -10px rgba(0, 40, 64, 0.05);
  margin-top: 36px;
}

.vti-specs-table-modern {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--vti-text-sm);
  text-align: left;
}

.vti-specs-table-modern thead th {
  background: var(--vti-navy-dark);
  color: #ffffff;
  font-weight: 700;
  padding: 16px 20px;
  letter-spacing: 0.02em;
}

.vti-specs-table-modern tbody td {
  padding: 14px 20px;
  border-bottom: 1px solid var(--vti-border-subtle);
  color: var(--vti-text-muted);
  vertical-align: top;
  line-height: 1.55;
}

.vti-specs-table-modern tbody tr:nth-child(even) td {
  background: #fafcff;
}

.vti-specs-table-modern tbody tr:last-child td {
  border-bottom: none;
}

.vti-specs-table-modern .spec-key {
  font-weight: 700;
  color: var(--vti-text-ink);
  width: 32%;
  white-space: nowrap;
}

@media (max-width: 600px) {
  .vti-specs-table-wrap {
    overflow-x: auto;
  }
  .vti-specs-table-modern .spec-key {
    white-space: normal;
  }
}

/* 7. FAQ Accordion */
.vti-faq-section {
  padding: clamp(64px, 7vw, 96px) 0;
  background: #ffffff;
  border-bottom: 1px solid var(--vti-border);
}

.vti-faq-list {
  max-width: 860px;
  margin: 36px auto 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.vti-faq-item {
  border: 1px solid var(--vti-border);
  border-radius: var(--vti-radius-md);
  background: #ffffff;
  overflow: hidden;
  transition: border-color var(--vti-transition-fast), box-shadow var(--vti-transition-fast);
}

.vti-faq-item[open] {
  border-color: rgba(229, 147, 36, 0.4);
  box-shadow: 0 10px 24px -8px rgba(0, 40, 64, 0.06);
}

.vti-faq-summary {
  padding: 18px 24px;
  font-weight: 700;
  font-size: 1.02rem;
  color: var(--vti-text-ink);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  user-select: none;
  list-style: none;
}

.vti-faq-summary::-webkit-details-marker {
  display: none;
}

.vti-faq-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  color: var(--vti-amber-warm);
  transition: transform var(--vti-transition-fast);
}

.vti-faq-item[open] .vti-faq-icon {
  transform: rotate(180deg);
}

.vti-faq-content {
  padding: 0 24px 20px;
  color: var(--vti-text-muted);
  font-size: var(--vti-text-sm);
  line-height: 1.65;
  border-top: 1px solid var(--vti-border-subtle);
  padding-top: 16px;
}

.vti-faq-content p:last-child {
  margin-bottom: 0;
}

/* 8. Related Products Grid */
.vti-related-section {
  padding: clamp(64px, 7vw, 96px) 0;
  background: var(--vti-bg-page);
  border-bottom: 1px solid var(--vti-border);
}

.vti-related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-top: 36px;
}

@media (max-width: 900px) {
  .vti-related-grid {
    grid-template-columns: 1fr;
  }
}

.vti-related-card {
  background: #ffffff;
  border: 1px solid var(--vti-border);
  border-radius: var(--vti-radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform var(--vti-transition-fast), box-shadow var(--vti-transition-fast);
  text-decoration: none;
  color: inherit;
}

.vti-related-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 36px -10px rgba(0, 40, 64, 0.1);
  border-color: rgba(229, 147, 36, 0.4);
}

.vti-related-thumb {
  height: 180px;
  background: var(--vti-bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.vti-related-thumb img {
  max-height: 150px;
  max-width: 85%;
  object-fit: contain;
  transition: transform var(--vti-transition-normal);
}

.vti-related-card:hover .vti-related-thumb img {
  transform: scale(1.05);
}

.vti-related-body {
  padding: 22px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.vti-related-tag {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--vti-amber-warm);
  margin-bottom: 6px;
}

.vti-related-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--vti-text-ink);
  margin: 0 0 8px;
}

.vti-related-desc {
  font-size: var(--vti-text-sm);
  color: var(--vti-text-muted);
  line-height: 1.55;
  margin: 0 0 16px;
  flex-grow: 1;
}

.vti-related-link {
  font-size: 13px;
  font-weight: 700;
  color: var(--vti-navy-brand);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* 9. Catalog Grid (/san-pham/) */
.vti-catalog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-top: 44px;
}

@media (max-width: 960px) {
  .vti-catalog-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .vti-catalog-grid {
    grid-template-columns: 1fr;
  }
}

.vti-catalog-card {
  background: #ffffff;
  border: 1px solid var(--vti-border);
  border-radius: var(--vti-radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all var(--vti-transition-fast);
  text-decoration: none;
  color: inherit;
}

.vti-catalog-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 40px -12px rgba(0, 40, 64, 0.12);
  border-color: rgba(229, 147, 36, 0.4);
}

.vti-catalog-thumb {
  height: 200px;
  background: #f8fafc;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  border-bottom: 1px solid var(--vti-border-subtle);
}

.vti-catalog-thumb img {
  max-height: 170px;
  max-width: 90%;
  object-fit: contain;
}

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

/* 10. Platform Architecture Cards (/nen-tang/) */
.vti-arch-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-top: 40px;
}

@media (max-width: 960px) {
  .vti-arch-grid {
    grid-template-columns: 1fr;
  }
}

.vti-arch-card {
  background: #ffffff;
  border: 1px solid var(--vti-border);
  border-radius: var(--vti-radius-lg);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  box-shadow: 0 10px 25px -10px rgba(0, 40, 64, 0.05);
}

.vti-arch-badge {
  display: inline-block;
  align-self: flex-start;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--vti-cyan-cool);
  background: rgba(14, 165, 233, 0.1);
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: 16px;
}

.vti-proto-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 36px;
}

@media (max-width: 960px) {
  .vti-proto-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .vti-proto-grid {
    grid-template-columns: 1fr;
  }
}

.vti-proto-card {
  background: #ffffff;
  border: 1px solid var(--vti-border);
  border-radius: var(--vti-radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
}

.vti-proto-tag {
  font-size: 11px;
  font-weight: 700;
  color: var(--vti-amber-warm);
  margin-bottom: 8px;
  text-transform: uppercase;
}

/* ========================================================
   ENHANCED 3D PRODUCT VIEWERS & DIGITAL TWIN SIMULATION
   ======================================================== */

/* Product Card Badges */
.vti-badge-hot {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: linear-gradient(135deg, #ef4444 0%, #f59e0b 100%);
  color: #ffffff;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 6px;
  box-shadow: 0 2px 10px rgba(239, 68, 68, 0.4);
}

.vti-badge-new {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: linear-gradient(135deg, #0284c7 0%, #06b6d4 100%);
  color: #ffffff;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 6px;
  box-shadow: 0 2px 10px rgba(2, 132, 199, 0.4);
}

/* Price & Status Tag */
.vti-product-price-tag {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 700;
  color: #38bdf8;
  margin: 14px 0 18px;
  padding: 8px 14px;
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.22);
  border-radius: 8px;
  width: fit-content;
}

/* 3D Canvas Toolbar Controls */
.vti-viewer-toolbar {
  position: absolute;
  top: 14px;
  right: 14px;
  display: flex;
  align-items: center;
  gap: 6px;
  z-index: 25;
  background: rgba(6, 21, 31, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  padding: 4px;
  backdrop-filter: blur(10px);
}

.vti-tb-btn {
  background: transparent;
  border: none;
  color: #cbd5e1;
  width: 28px;
  height: 28px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 13px;
  transition: all 0.2s ease;
}

.vti-tb-btn:hover {
  background: rgba(255, 255, 255, 0.15);
  color: #ffffff;
}

.vti-tb-btn.active {
  background: rgba(2, 132, 199, 0.45);
  color: #38bdf8;
}

/* 3D Simulation Digital Twin Studio Section */
.vti-sim-section {
  padding: 90px 0;
  background: linear-gradient(180deg, #04101a 0%, #061622 50%, #030d15 100%);
  border-top: 1px solid rgba(0, 229, 255, 0.15);
  border-bottom: 1px solid rgba(0, 229, 255, 0.15);
  position: relative;
  overflow: hidden;
}

.vti-sim-section::before {
  content: "";
  position: absolute;
  top: -150px;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 400px;
  background: radial-gradient(circle, rgba(0, 229, 255, 0.08) 0%, rgba(0, 0, 0, 0) 70%);
  pointer-events: none;
}

.vti-sim-container {
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 20px;
}

.vti-sim-frame {
  background: rgba(8, 26, 39, 0.88);
  border: 1px solid rgba(0, 229, 255, 0.28);
  border-radius: 16px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.65), 0 0 30px rgba(0, 229, 255, 0.12);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.vti-sim-topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 20px;
  background: rgba(4, 15, 23, 0.95);
  border-bottom: 1px solid rgba(0, 229, 255, 0.18);
  flex-wrap: wrap;
  gap: 12px;
}

.vti-sim-scene-selector {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 4px 0;
  scrollbar-width: none;
}

.vti-sim-scene-selector::-webkit-scrollbar {
  display: none;
}

.vti-sim-scene-btn {
  padding: 8px 14px;
  background: rgba(14, 40, 58, 0.65);
  border: 1px solid rgba(0, 229, 255, 0.2);
  border-radius: 8px;
  color: #94a3b8;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s ease;
}

.vti-sim-scene-btn:hover {
  color: #ffffff;
  border-color: #00e5ff;
  background: rgba(0, 64, 96, 0.5);
}

.vti-sim-scene-btn.active {
  background: #004060;
  border-color: #00e5ff;
  color: #ffffff;
  box-shadow: 0 0 12px rgba(0, 229, 255, 0.35);
}

.vti-sim-viewport-wrap {
  width: 100%;
  height: 640px;
  position: relative;
  background: #030e16;
}

.vti-sim-iframe {
  width: 100%;
  height: 100%;
  border: none;
  display: block;
}

.vti-sim-bottombar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 24px;
  background: rgba(4, 15, 23, 0.95);
  border-top: 1px solid rgba(0, 229, 255, 0.18);
  flex-wrap: wrap;
  gap: 12px;
}

.vti-sim-features {
  display: flex;
  gap: 20px;
  align-items: center;
  flex-wrap: wrap;
  font-size: 13px;
  color: #94a3b8;
}

.vti-sim-feat-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.vti-sim-feat-item span.highlight {
  color: #00e5ff;
  font-weight: 600;
}




/* ==========================================================================
   ENHANCED STYLES: TBR-22, 3 DISTINCT PRODUCTS, OTHER PRODUCTS, & CONTACT CHANNELS
   ========================================================================== */

/* TBR-22 Badge & Theme */
.vti-badge-compact {
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.25) 0%, rgba(6, 182, 212, 0.25) 100%);
  border: 1px solid #06b6d4;
  color: #67e8f9;
  box-shadow: 0 0 12px rgba(6, 182, 212, 0.3);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 4px 12px;
  border-radius: 999px;
}

/* Quick Jump Product Nav Pills */
.vti-prod-nav-bar {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin: 0 auto 36px;
  max-width: 960px;
  padding: 0 16px;
}

.vti-prod-nav-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  background: rgba(13, 34, 56, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 999px;
  color: #cbd5e1;
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.25s ease;
}

.vti-prod-nav-pill:hover,
.vti-prod-nav-pill.active {
  background: #0284c7;
  border-color: #38bdf8;
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(2, 132, 199, 0.4);
  transform: translateY(-2px);
}

/* Sub-values in contact channels (Phone & Email lists) */
.vti-channel-subvals {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 6px;
}

.vti-channel-subitem {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: rgba(255, 255, 255, 0.03);
  padding: 6px 12px;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.vti-subitem-badge {
  font-size: 11px;
  color: #94a3b8;
  background: rgba(255, 255, 255, 0.08);
  padding: 2px 8px;
  border-radius: 4px;
  white-space: nowrap;
  font-weight: 500;
}

/* Dedicated VTICorp Link Card */
.vti-corp-link-box {
  background: linear-gradient(135deg, rgba(2, 132, 199, 0.15) 0%, rgba(15, 23, 42, 0.9) 100%);
  border: 1px solid rgba(56, 189, 248, 0.35);
  border-radius: 12px;
  padding: 20px 22px;
  margin-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
  position: relative;
  overflow: hidden;
}

.vti-corp-link-box::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: #38bdf8;
}

.vti-corp-link-title {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #38bdf8;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
}

.vti-corp-link-desc {
  font-size: 13px;
  color: #cbd5e1;
  line-height: 1.5;
  margin: 0;
}

.vti-corp-link-url {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: #00e5ff;
  font-weight: 700;
  font-size: 14px;
  text-decoration: none;
  transition: all 0.2s ease;
  margin-top: 4px;
  word-break: break-all;
}

.vti-corp-link-url:hover {
  color: #38bdf8;
  text-decoration: underline;
  transform: translateX(4px);
}

/* Tech Icon Box for Other Products (replacing partner company logos) */
.vti-other-tech-icon-box {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.2) 0%, rgba(3, 105, 161, 0.3) 100%);
  border: 1px solid rgba(56, 189, 248, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #38bdf8;
  box-shadow: 0 4px 12px rgba(14, 165, 233, 0.2);
}

/* ==========================================================================
   VTI 3D INTERACTIVE STUDIO COMPONENT
   ========================================================================== */
.vti-3d-studio-section {
  background: #030c18;
  padding: 5rem 0;
  border-top: 1px solid rgba(56, 189, 248, 0.15);
  border-bottom: 1px solid rgba(56, 189, 248, 0.15);
  position: relative;
  overflow: hidden;
}

.vti-3d-studio-card {
  background: #071322;
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 24px 48px -12px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(56, 189, 248, 0.1);
  margin-top: 2rem;
}

.vti-3d-aspect-wrap {
  position: relative;
  width: 100%;
  height: 680px;
  background: #050d18;
}

@media (max-width: 768px) {
  .vti-3d-aspect-wrap {
    height: 540px;
  }
}

.vti-3d-aspect-wrap iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
}

.vti-3d-toolbar-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding: 12px 20px;
  background: #0a1829;
  border-top: 1px solid rgba(56, 189, 248, 0.15);
}

.vti-3d-pills {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 4px;
}

.btn-3d-pill {
  font-size: 12px;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 6px;
  border: 1px solid rgba(148, 163, 184, 0.25);
  background: transparent;
  color: #94a3b8;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.2s ease;
}

.btn-3d-pill:hover,
.btn-3d-pill.active {
  border-color: #38bdf8;
  background: rgba(56, 189, 248, 0.15);
  color: #38bdf8;
}

.btn-3d-external {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  color: #38bdf8;
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.3);
  border-radius: 8px;
  padding: 8px 16px;
  text-decoration: none;
  transition: all 0.2s ease;
}

.btn-3d-external:hover {
  background: rgba(56, 189, 248, 0.2);
  border-color: #38bdf8;
  color: #fff;
}