/* ==========================================================================
   CƠ KHÍ MẠNH NGHĨA ĐÀ NẴNG
   Design System: "Industrial Technology – Premium"
   Palette: Pure White (#FFFFFF) + Soft Light Blue (#F5F9FF) + Tech Blue (#0866E8) + Deep Navy (#0B2340)
   ========================================================================== */

:root {
  /* ==========================================
     COLOR TOKENS (Theo chỉ định kiến trúc chính thức)
     ========================================== */
  --bg-primary: #FFFFFF;        /* Background chính */
  --bg-secondary: #F5F9FF;      /* Section phụ xen kẽ */
  --bg-tertiary: #EEF4FA;       /* Input & subtle fill */
  --bg-card: #FFFFFF;           /* Card background */
  --bg-card-hover: #FFFFFF;
  --bg-elevated: #F5F9FF;
  --bg-glass: rgba(255, 255, 255, 0.94);
  --bg-header: #FFFFFF;
  --bg-topbar: #0B2340;         /* Topbar xanh navy thanh lịch */
  --bg-footer: #0B2340;         /* Footer xanh đậm công nghệ */

  /* Borders: Architectural Crisp Soft Blue */
  --border-subtle: #E8F0FA;
  --border-medium: #DCE8F7;
  --border-dark: #C5DCF5;
  --border-blue: rgba(8, 102, 232, 0.35);

  /* Primary Brand Blue (Điểm nhấn công nghệ & CTA chính) */
  --color-brand-blue: #0866E8;
  --color-brand-blue-hover: #0652BF;
  --color-brand-blue-light: #38BDF8;
  --color-brand-blue-subtle: #F0F6FF;
  --color-brand-blue-glow: rgba(8, 102, 232, 0.28);

  /* Dark Navy (Tiêu đề, Heading & Khung cao cấp) */
  --color-navy: #0B2340;
  --color-navy-light: #16375E;

  /* Typography: High-Contrast Crisp Slate & Navy (WCAG AAA) */
  --text-primary: #102A43;      /* Chữ chính */
  --text-secondary: #526579;    /* Chữ phụ */
  --text-muted: #627D98;        /* Chữ nhạt / ghi chú */
  --text-dim: #829AB1;
  --text-white: #FFFFFF;

  /* Shadows: Architectural Clean Soft Blue Shadows */
  --shadow-sm: 0 2px 8px rgba(11, 35, 64, 0.05);
  --shadow-md: 0 8px 24px rgba(11, 35, 64, 0.07);
  --shadow-lg: 0 16px 40px rgba(11, 35, 64, 0.1);
  --shadow-card: 0 4px 18px rgba(8, 102, 232, 0.06);
  --shadow-card-hover: 0 12px 32px rgba(8, 102, 232, 0.14);
  --shadow-blue: 0 6px 22px rgba(8, 102, 232, 0.32);

  /* Typography Fonts */
  --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  /* Layout Tokens - Chuẩn 1440px căn đều toàn bộ Header, Content & Footer */
  --container-max-width: 1440px;
  --header-height: 70px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-pill: 9999px;
  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Base Resets */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  color-scheme: light;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-secondary);
  font-family: var(--font-body);
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

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

button, input, select, textarea {
  font-family: inherit;
  color: inherit;
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* Typography Utility */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--color-navy);
  font-weight: 700;
  line-height: 1.25;
}

.text-tech-blue, .text-blue {
  color: var(--color-brand-blue) !important;
}

.text-navy {
  color: var(--color-navy) !important;
}

.text-white {
  color: #FFFFFF !important;
}

/* Section Header Typography */
.section-title-wrap {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 52px auto;
}

.section-title {
  font-size: 2.35rem;
  letter-spacing: -0.5px;
  margin-top: 14px;
  margin-bottom: 14px;
  color: var(--color-navy);
}

.section-subtitle {
  color: var(--text-secondary);
  font-size: 1.05rem;
}

/* Badges System (Industrial Technology) */
.badge-tech, .badge-blue {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  background: var(--color-brand-blue-subtle);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-pill);
  color: var(--color-brand-blue);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  box-shadow: 0 2px 8px rgba(8, 102, 232, 0.08);
}

.badge-tech.badge-sm {
  padding: 4px 12px;
  font-size: 0.75rem;
}

.badge-dot-blue {
  width: 8px;
  height: 8px;
  background-color: var(--color-brand-blue);
  border-radius: 50%;
  box-shadow: 0 0 8px rgba(8, 102, 232, 0.6);
  animation: pulse-dot-blue 2s infinite ease-in-out;
}

@keyframes pulse-dot-blue {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.35; transform: scale(0.8); }
}

/* ==========================================
   BUTTON STYLES (Tech Blue #0866E8 & Crisp Secondary)
   ========================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 26px;
  font-weight: 700;
  font-size: 0.95rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition-fast);
  white-space: nowrap;
}

/* Primary CTA Button: Xanh #0866E8 làm điểm nhấn chính */
.btn-cta, .btn-primary {
  background: var(--color-brand-blue);
  color: #FFFFFF !important;
  box-shadow: var(--shadow-blue);
  position: relative;
  overflow: hidden;
  border: 1px solid var(--color-brand-blue);
}

.btn-cta:hover, .btn-primary:hover {
  background: var(--color-brand-blue-hover);
  border-color: var(--color-brand-blue-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 26px rgba(8, 102, 232, 0.42);
  color: #FFFFFF !important;
}

.btn-cta::after, .btn-primary::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -70%;
  width: 35%;
  height: 200%;
  background: linear-gradient(
    60deg,
    rgba(255, 255, 255, 0) 0%,
    rgba(255, 255, 255, 0.35) 50%,
    rgba(255, 255, 255, 0) 100%
  );
  transform: rotate(25deg);
  animation: shimmer-sweep 4s infinite ease-in-out;
}

@keyframes shimmer-sweep {
  0% { left: -70%; }
  35%, 100% { left: 150%; }
}

/* Secondary Buttons: Refined White Background, Tech Blue Outline & Navy Text */
.btn-secondary,
.btn-secondary-outline,
.btn-zalo-outline,
.btn-blue {
  background: #FFFFFF;
  border: 1.5px solid rgba(8, 102, 232, 0.4);
  color: var(--color-navy) !important;
  box-shadow: 0 2px 8px rgba(11, 35, 64, 0.05);
  font-weight: 600;
}

.btn-secondary svg,
.btn-secondary-outline svg {
  color: var(--color-brand-blue);
}

.btn-zalo-outline svg {
  color: #0068FF;
}

.btn-secondary:hover,
.btn-secondary-outline:hover,
.btn-zalo-outline:hover,
.btn-blue:hover {
  background: #F0F6FF;
  border-color: var(--color-brand-blue);
  color: var(--color-brand-blue) !important;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(8, 102, 232, 0.16);
}

/* Zalo Button (Default style) */
.btn-zalo {
  background: #FFFFFF;
  border: 1.5px solid rgba(8, 102, 232, 0.45);
  color: var(--color-navy) !important;
  box-shadow: 0 2px 8px rgba(11, 35, 64, 0.05);
}

.btn-zalo svg {
  color: #0068FF;
}

.btn-zalo:hover {
  background: #F0F6FF;
  border-color: #0068FF;
  color: #0068FF !important;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0, 104, 255, 0.2);
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.85rem;
}

/* ==========================================
   TOP BAR & HEADER (Chuẩn Mockup: Header Trắng Tinh Tế)
   ========================================== */
.top-bar {
  display: none !important;
}

.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: #FFFFFF;
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  height: 68px;
  display: flex;
  align-items: center;
  transition: var(--transition-normal);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.03);
}

.header.scrolled {
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 4px 16px rgba(11, 35, 64, 0.06);
}

.header .container.nav-container,
.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  max-width: 1440px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  letter-spacing: -0.5px;
  flex-shrink: 0;
  white-space: nowrap;
}

.logo-img {
  width: 44px;
  height: 44px;
  object-fit: cover;
  border-radius: 50%;
  border: 1px solid #E2E8F0;
  box-shadow: 0 2px 6px rgba(11, 35, 64, 0.08);
  flex-shrink: 0;
}

.logo-title {
  color: var(--color-navy);
  font-size: 1.25rem;
  font-weight: 900;
  letter-spacing: 0.5px;
  line-height: 1.1;
  display: block;
}

.logo-text-sub {
  display: block;
  font-size: 0.72rem;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  color: var(--color-brand-blue);
  font-weight: 700;
  line-height: 1.2;
  margin-top: 2px;
  white-space: nowrap;
}

.main-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1;
  min-width: 0;
}

.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  gap: clamp(10px, 1.4vw, 22px);
  margin: 0;
  padding: 0;
}

.nav-link {
  font-weight: 600;
  font-size: 0.885rem;
  color: #1E293B;
  position: relative;
  padding: 8px 2px;
  white-space: nowrap;
  transition: var(--transition-fast);
  display: inline-block;
}

.nav-link:hover, .nav-link.active {
  color: var(--color-brand-blue);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0px;
  left: 0;
  width: 0;
  height: 2.5px;
  background-color: var(--color-brand-blue);
  border-radius: 2px;
  transition: var(--transition-fast);
}

.nav-link:hover::after, .nav-link.active::after {
  width: 100%;
}

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

/* Hotline dạng viên thuốc trắng viền mỏng chuẩn mockup */
.nav-hotline-compact {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  font-weight: 700;
  color: #0F172A;
  padding: 7px 16px;
  border-radius: var(--radius-pill);
  background: #FFFFFF;
  border: 1px solid #CBD5E1;
  transition: var(--transition-fast);
  white-space: nowrap;
  flex-shrink: 0;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.02);
}

.nav-hotline-compact svg {
  color: var(--color-brand-blue);
  flex-shrink: 0;
}

.nav-hotline-compact:hover {
  background: #FFFFFF;
  border-color: var(--color-brand-blue);
  color: var(--color-brand-blue);
  box-shadow: 0 2px 10px rgba(8, 102, 232, 0.15);
}

.mobile-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--color-navy);
  cursor: pointer;
  padding: 8px;
}

/* ==========================================
   HERO SECTION (Industrial Technology – Chuẩn Mockup)
   Nền trắng chuyển tiếp mượt mà + Ảnh biệt thự sang trọng
   ========================================== */
.hero {
  position: relative;
  min-height: calc(100vh - 68px);
  display: flex;
  align-items: center;
  padding: 28px 0 24px 0;
  overflow: hidden;
  background-color: #FFFFFF;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 1;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center right;
  opacity: 1;
}

/* Gradient trắng 100% bên trái mờ dần sang 0% bên phải */
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    #FFFFFF 0%,
    #FFFFFF 36%,
    rgba(255, 255, 255, 0.96) 46%,
    rgba(255, 255, 255, 0.72) 58%,
    rgba(255, 255, 255, 0.22) 72%,
    rgba(255, 255, 255, 0) 84%
  );
  z-index: 2;
}

.hero-sparks-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 3;
}

.hero-container {
  position: relative;
  z-index: 4;
}

.hero-content {
  max-width: 680px;
}

.hero-badge {
  margin-bottom: 14px;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.6px;
  padding: 5px 14px;
  background: #EFF6FF;
  border: 1px solid #BFDBFE;
  color: var(--color-brand-blue);
  border-radius: var(--radius-pill);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.hero-badge .badge-star {
  font-size: 0.85rem;
  color: var(--color-brand-blue);
  line-height: 1;
}

.hero-title {
  font-size: clamp(2.1rem, 3.4vw, 2.95rem);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -0.6px;
  margin: 0 0 16px 0;
  text-transform: uppercase;
}

.hero-title .title-dark {
  color: #0B2340;
  display: block;
}

.hero-title .title-blue {
  color: #0066CC;
  background: linear-gradient(135deg, #0066CC 0%, #004C99 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: block;
}

.hero-title .title-word {
  display: inline;
}

.hero-desc {
  font-size: 0.96rem;
  line-height: 1.68;
  color: #334155;
  margin-bottom: 26px;
  max-width: 620px;
  background: transparent;
  border: none;
  padding: 0;
  box-shadow: none;
}

.hero-desc strong {
  color: #0F172A;
  font-weight: 700;
}

.hero-buttons {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 30px;
}

.hero-buttons .btn {
  padding: 12px 26px;
  font-size: 0.94rem;
  border-radius: 9px;
  font-weight: 750;
  letter-spacing: 0.2px;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-arrow {
  font-size: 1.15rem;
  line-height: 1;
  margin-left: 2px;
  transition: transform 0.2s ease;
}

.btn-cta {
  background: linear-gradient(135deg, #0066CC 0%, #004C99 100%);
  color: #FFFFFF !important;
  box-shadow: 0 6px 20px -2px rgba(0, 102, 204, 0.45);
  border: 1px solid rgba(255, 255, 255, 0.15);
  position: relative;
  overflow: hidden;
}

.btn-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 26px -2px rgba(0, 102, 204, 0.58);
  background: linear-gradient(135deg, #0073E6 0%, #0052A3 100%);
}

.btn-cta:hover .btn-arrow {
  transform: translateX(4px);
}

.btn-zalo-outline {
  background: #FFFFFF;
  border: 1.5px solid #0068FF;
  color: #0068FF !important;
  box-shadow: 0 2px 10px rgba(0, 104, 255, 0.08);
}

.btn-zalo-outline svg {
  color: #0068FF;
}

.btn-zalo-outline:hover {
  background: #F0F7FF;
  border-color: #0050D8;
  color: #0050D8 !important;
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(0, 104, 255, 0.2);
}

/* Hero Trust Highlights Bar (4 thẻ ngang đều sang trọng) */
.hero-trust-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  max-width: 1140px;
  margin-top: 6px;
  padding-top: 0;
  border-top: none;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 11px;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(219, 234, 254, 0.85);
  padding: 10px 14px;
  border-radius: 10px;
  box-shadow: 0 3px 12px rgba(11, 35, 64, 0.04);
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  min-width: 0;
}

.trust-item:hover {
  background: #FFFFFF;
  border-color: #93C5FD;
  transform: translateY(-3px);
  box-shadow: 0 10px 24px -4px rgba(8, 102, 232, 0.15);
}

.trust-icon-box {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: linear-gradient(135deg, #EFF6FF 0%, #DBEAFE 100%);
  border: 1px solid #BFDBFE;
  color: var(--color-brand-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all 0.25s ease;
}

.trust-item:hover .trust-icon-box {
  background: linear-gradient(135deg, #0066CC 0%, #004C99 100%);
  color: #FFFFFF;
  border-color: #0066CC;
  transform: scale(1.06);
}

.trust-text {
  display: flex;
  flex-direction: column;
  min-width: 0;
  overflow: hidden;
}

.trust-title {
  display: block;
  font-size: 0.8125rem;
  font-weight: 750;
  color: #0F172A;
  line-height: 1.25;
  margin-bottom: 2px;
  white-space: nowrap;
  letter-spacing: -0.2px;
}

.trust-desc {
  display: block;
  font-size: 0.70rem;
  color: #64748B;
  line-height: 1.25;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-weight: 500;
}

.trust-chevron {
  display: none;
  align-items: center;
  color: #94A3B8;
  margin-left: auto;
  flex-shrink: 0;
}

/* ==========================================
   METRICS SECTION (Trắng #FFFFFF)
   ========================================== */
.metrics-section {
  background-color: var(--bg-primary);
  border-top: 1px solid var(--border-medium);
  border-bottom: 1px solid var(--border-medium);
  padding: 44px 0;
  position: relative;
  z-index: 5;
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
}

.metric-item {
  text-align: center;
  position: relative;
}

.metric-item:not(:last-child)::after {
  content: '';
  position: absolute;
  right: 0;
  top: 15%;
  height: 70%;
  width: 1px;
  background: var(--border-medium);
}

.metric-number {
  font-family: var(--font-heading);
  font-size: 3.2rem;
  font-weight: 800;
  line-height: 1;
  margin-bottom: 8px;
  color: var(--color-brand-blue);
}

.metric-label {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 600;
}

/* ==========================================
   ABOUT SECTION (Section phụ: #F5F9FF)
   ========================================== */
.about-section {
  padding: 100px 0;
  background: var(--bg-secondary);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.about-image-wrapper {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-medium);
  background: #FFFFFF;
}

.about-image-wrapper img {
  width: 100%;
  height: 480px;
  object-fit: contain;
  transition: transform 0.6s ease;
  padding: 10px;
}

.about-image-wrapper:hover img {
  transform: scale(1.03);
}

.about-floating-badge {
  position: absolute;
  bottom: 24px;
  left: 24px;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-medium);
  padding: 16px 22px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  gap: 16px;
  box-shadow: var(--shadow-md);
}

.about-floating-badge strong {
  color: var(--color-navy) !important;
}

.about-floating-badge .icon {
  color: var(--color-brand-blue);
  display: flex;
  align-items: center;
  justify-content: center;
}

.about-pill-center {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
  padding: 5px 16px;
  background: #EFF6FF;
  border: 1px solid #BFDBFE;
  border-radius: 9999px;
  color: var(--color-brand-blue);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.4px;
}

.about-main-title {
  font-size: 2.2rem;
  font-weight: 800;
  margin: 12px 0 16px 0;
  color: var(--color-navy);
  line-height: 1.3;
}

.about-pill-sub {
  margin-top: 4px;
  margin-bottom: 18px;
}

.about-content h2 {
  font-size: 2.3rem;
  margin: 16px 0 20px 0;
  color: var(--color-navy);
}

.about-features-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin: 32px 0;
}

.about-feature {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.about-feature-icon {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--color-brand-blue-subtle);
  color: var(--color-brand-blue);
  border: 1px solid var(--border-medium);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
  font-weight: 700;
}

.about-feature-text {
  flex: 1;
}

.about-feature h4 {
  color: var(--color-navy);
  font-size: 1.05rem;
  margin-bottom: 4px;
}

.about-feature p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.5;
}

.about-cta-wrap {
  margin-top: 28px;
}

.btn-about-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: #0066CC;
  color: #FFFFFF !important;
  font-weight: 700;
  font-size: 0.98rem;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  padding: 14px 28px;
  border-radius: 8px;
  border: none;
  box-shadow: 0 4px 16px rgba(0, 102, 204, 0.35);
  transition: all 0.25s ease;
  text-decoration: none;
}

.btn-about-cta:hover {
  background: #0052A3;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 102, 204, 0.45);
}

.mobile-bottom-dock {
  display: none;
}

/* ==========================================
   SERVICES SECTION (Section chính: Trắng #FFFFFF)
   ========================================== */
.services-section {
  padding: 100px 0;
  background-color: var(--bg-primary);
  border-top: 1px solid var(--border-medium);
}

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

.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition-normal);
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
}

.service-card:hover {
  transform: translateY(-6px);
  border-color: var(--color-brand-blue);
  box-shadow: var(--shadow-card-hover);
}

.service-thumb {
  height: 220px;
  overflow: hidden;
  position: relative;
}

.service-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.service-card:hover .service-thumb img {
  transform: scale(1.06);
}

.service-category-tag {
  position: absolute;
  top: 14px;
  left: 14px;
  background: var(--color-navy);
  color: #FFFFFF;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

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

.service-body h3 {
  font-size: 1.25rem;
  margin-bottom: 12px;
  color: var(--color-navy);
}

.service-body p {
  color: var(--text-secondary);
  font-size: 0.925rem;
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}

.service-specs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.spec-pill {
  font-size: 0.75rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-medium);
  padding: 3px 9px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-weight: 500;
}

.service-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--color-brand-blue);
  font-weight: 700;
  font-size: 0.9rem;
}

.service-link:hover {
  color: var(--color-brand-blue-hover);
  gap: 12px;
}

/* ==========================================
   PRODUCTS & GALLERY SECTION (Section phụ: #F5F9FF)
   ========================================== */
.gallery-section {
  padding: 100px 0;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-medium);
}

.filter-tabs {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 44px;
  flex-wrap: wrap;
}

.filter-btn {
  background: #FFFFFF;
  border: 1px solid var(--border-medium);
  color: var(--text-secondary);
  padding: 9px 22px;
  border-radius: var(--radius-pill);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
  box-shadow: var(--shadow-sm);
}

.filter-btn:hover {
  background: var(--color-brand-blue-subtle);
  border-color: var(--color-brand-blue);
  color: var(--color-brand-blue);
}

.filter-btn.active {
  background: var(--color-brand-blue);
  color: #FFFFFF;
  border-color: var(--color-brand-blue);
  box-shadow: 0 4px 16px rgba(8, 102, 232, 0.35);
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.product-item {
  background: #FFFFFF;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition-normal);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  cursor: pointer;
  position: relative;
}

.product-item.is-hidden {
  display: none !important;
}

.product-item:hover {
  border-color: var(--color-brand-blue);
  transform: translateY(-5px);
  box-shadow: var(--shadow-card-hover);
}

.product-image {
  position: relative;
  height: 210px;
  overflow: hidden;
  background: var(--bg-tertiary);
}

.product-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.45s cubic-bezier(0.16, 1, 0.3, 1);
}

.product-item:hover .product-image img {
  transform: scale(1.08);
}

.product-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  background: rgba(11, 35, 64, 0.88);
  backdrop-filter: blur(6px);
  color: #FFFFFF;
  font-size: 0.725rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  letter-spacing: 0.3px;
  z-index: 2;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.product-overlay {
  position: absolute;
  inset: 0;
  background: rgba(11, 35, 64, 0.65);
  backdrop-filter: blur(3px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  opacity: 0;
  transition: opacity var(--transition-fast);
  z-index: 3;
}

.product-item:hover .product-overlay {
  opacity: 1;
}

.btn-zoom {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: #FFFFFF;
  color: var(--color-brand-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.25);
  transform: scale(0.85);
  transition: transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.product-item:hover .btn-zoom {
  transform: scale(1);
}

.zoom-text {
  color: #FFFFFF;
  font-size: 0.825rem;
  font-weight: 600;
  letter-spacing: 0.3px;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.4);
}

.product-info {
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.product-info h4 {
  font-size: 1.05rem;
  margin-bottom: 8px;
  color: var(--color-navy);
  line-height: 1.4;
  font-weight: 700;
}

.product-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.55;
  margin-bottom: 14px;
  flex-grow: 1;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.product-meta {
  font-size: 0.8rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding-top: 10px;
  border-top: 1px solid var(--border-subtle);
}

.product-spec {
  font-size: 0.75rem;
  color: var(--color-navy);
  font-weight: 600;
  background: var(--bg-secondary);
  border: 1px solid var(--border-medium);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 65%;
}

.product-loc {
  font-size: 0.775rem;
  font-weight: 700;
  white-space: nowrap;
}

.filter-count {
  font-size: 0.82em;
  opacity: 0.85;
  font-weight: 600;
}

/* ==========================================
   GALLERY LOAD MORE & PROGRESS BAR
   ========================================== */
.gallery-load-more-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-top: 48px;
  width: 100%;
}

.gallery-load-more-wrap.is-hidden {
  display: none !important;
}

.btn-load-more {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 13px 32px;
  background: #FFFFFF;
  color: var(--color-navy);
  border: 1.5px solid rgba(8, 102, 232, 0.4);
  border-radius: var(--radius-pill);
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(8, 102, 232, 0.1);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
  user-select: none;
}

.btn-load-more:hover {
  background: var(--color-brand-blue);
  color: #FFFFFF !important;
  border-color: var(--color-brand-blue);
  box-shadow: 0 8px 28px rgba(8, 102, 232, 0.36);
  transform: translateY(-2px);
}

.btn-load-more:active {
  transform: translateY(0);
}

.btn-load-more-text {
  font-weight: 700;
  letter-spacing: 0.2px;
}

.btn-load-more-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: #EFF6FF;
  color: var(--color-brand-blue);
  font-size: 0.8rem;
  font-weight: 800;
  padding: 2px 10px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(8, 102, 232, 0.25);
  transition: all var(--transition-fast);
}

.btn-load-more:hover .btn-load-more-count {
  background: rgba(255, 255, 255, 0.25);
  color: #FFFFFF;
  border-color: rgba(255, 255, 255, 0.5);
}

.btn-load-more-icon-arrow {
  color: var(--color-brand-blue);
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1), color var(--transition-fast);
}

.btn-load-more:hover .btn-load-more-icon-arrow {
  color: #FFFFFF;
}

/* Trạng thái thu gọn */
.btn-load-more.is-collapsed-state {
  background: #F1F5F9;
  border-color: #CBD5E1;
  color: var(--text-secondary);
}

.btn-load-more.is-collapsed-state:hover {
  background: var(--color-navy);
  color: #FFFFFF !important;
  border-color: var(--color-navy);
  box-shadow: 0 8px 24px rgba(11, 35, 64, 0.25);
}

.btn-load-more.is-collapsed-state .btn-load-more-icon-arrow {
  color: var(--text-secondary);
}

.btn-load-more.is-collapsed-state:hover .btn-load-more-icon-arrow {
  color: #FFFFFF;
}

/* Tiến độ hiển thị */
.gallery-progress-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.gallery-counter-status {
  font-size: 0.86rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 5px;
}

.gallery-counter-status strong {
  color: var(--color-brand-blue);
  font-weight: 700;
}

.gallery-progress-bar {
  width: 190px;
  height: 6px;
  background: #E2E8F0;
  border-radius: var(--radius-pill);
  overflow: hidden;
  position: relative;
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.06);
}

.gallery-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-brand-blue), #38BDF8);
  border-radius: var(--radius-pill);
  transition: width 0.45s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ==========================================
   PRODUCTION PROCESS (Section chính: Trắng #FFFFFF)
   ========================================== */
.process-section {
  padding: 100px 0;
  background-color: var(--bg-primary);
  border-top: 1px solid var(--border-medium);
}

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

.process-step {
  background: var(--bg-secondary);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  position: relative;
  transition: var(--transition-normal);
  box-shadow: var(--shadow-sm);
}

.process-step:hover {
  border-color: var(--color-brand-blue);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
}

.step-number {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--color-brand-blue);
  margin-bottom: 14px;
}

.process-step h3 {
  font-size: 1.2rem;
  margin-bottom: 12px;
  color: var(--color-navy);
}

.process-step p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* ==========================================
   QUOTE CALCULATOR (Section phụ: #F5F9FF)
   ========================================== */
.calculator-section {
  padding: 100px 0;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-medium);
}

.calc-card {
  background: #FFFFFF;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: var(--shadow-lg);
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
}

.calc-form-group {
  margin-bottom: 24px;
}

.calc-form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-navy);
  margin-bottom: 8px;
}

.calc-select, .calc-input {
  width: 100%;
  background: #F8FAFD;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  color: var(--text-primary);
  font-size: 0.95rem;
  outline: none;
  transition: var(--transition-fast);
}

.calc-select:focus, .calc-input:focus {
  border-color: var(--color-brand-blue);
  background: #FFFFFF;
  box-shadow: 0 0 0 3px rgba(8, 102, 232, 0.15);
}

.calc-summary-box {
  background: linear-gradient(135deg, #0B2340 0%, #102A43 100%);
  border: 1px solid #16375E;
  border-radius: var(--radius-md);
  padding: 32px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  color: #FFFFFF;
  box-shadow: 0 10px 30px rgba(11, 35, 64, 0.2);
}

.calc-summary-box h3 {
  color: #FFFFFF;
}

.calc-summary-box p {
  color: #C5DCF5 !important;
}

.calc-price-display {
  text-align: center;
  margin: 24px 0;
  padding: 20px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-sm);
}

.calc-price-label {
  font-size: 0.85rem;
  color: #A0B3CC;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 600;
  margin-bottom: 4px;
}

.calc-price-val {
  font-size: 2.3rem;
  font-weight: 800;
  color: #38BDF8;
  font-family: var(--font-heading);
}

/* ==========================================
   CONTACT SECTION (Section chính: Trắng #FFFFFF)
   ========================================== */
.contact-section {
  padding: 100px 0;
  background-color: var(--bg-primary);
  border-top: 1px solid var(--border-medium);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
}

.contact-info-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  padding: 36px;
  height: 100%;
  box-shadow: var(--shadow-sm);
}

.contact-info-card h2 {
  color: var(--color-navy);
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 24px;
}

.contact-item strong {
  color: var(--color-navy);
}

.contact-item span {
  color: var(--text-secondary);
}

.contact-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: #FFFFFF;
  border: 1px solid var(--border-medium);
  color: var(--color-brand-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: var(--shadow-sm);
}

.contact-form {
  background: #FFFFFF;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  padding: 36px;
  box-shadow: var(--shadow-md);
}

.contact-form h3 {
  color: var(--color-navy);
}

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

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.form-control {
  width: 100%;
  background: #F8FAFD;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  color: var(--text-primary);
  outline: none;
  transition: var(--transition-fast);
}

.form-control:focus {
  border-color: var(--color-brand-blue);
  background: #FFFFFF;
  box-shadow: 0 0 0 3px rgba(8, 102, 232, 0.15);
}

/* ==========================================
   FOOTER (Xanh đậm #0B2340 theo đúng chỉ định)
   ========================================== */
.footer {
  background: var(--bg-footer);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 80px 0 30px 0;
  color: #A0B3CC;
  font-size: 0.9rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.3fr;
  gap: 44px;
  margin-bottom: 56px;
}

.footer-col .badge-tech {
  background: rgba(255, 255, 255, 0.08) !important;
  border: 1px solid rgba(255, 255, 255, 0.16) !important;
  color: #F1F5F9 !important;
  box-shadow: none !important;
  font-size: 0.74rem !important;
  padding: 6px 14px !important;
  letter-spacing: 0.4px !important;
  transition: all 0.2s ease !important;
}

.footer-col .badge-tech:hover {
  background: rgba(8, 102, 232, 0.35) !important;
  border-color: #38BDF8 !important;
  color: #38BDF8 !important;
}

.footer-col h4,
.footer-col-header {
  font-size: 1.1rem;
  color: #FFFFFF;
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 10px;
  background: transparent;
  border: none;
  font-family: inherit;
  font-weight: 700;
  text-align: left;
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-col h4::after,
.footer-col-header::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 32px;
  height: 2px;
  background-color: var(--color-brand-blue);
}

.footer-chevron {
  display: none;
}

.footer-col-body {
  display: block;
}

.footer-hotlines-list {
  display: none;
}

.footer-col .logo {
  color: #FFFFFF;
}

.footer-col .logo-title {
  color: #FFFFFF;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 12px;
}

.footer-links a {
  color: #A0B3CC;
}

.footer-links a:hover {
  color: #38BDF8;
  padding-left: 6px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 30px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.85rem;
  color: #6E88A6;
}

.footer-bottom a {
  color: #6E88A6;
}

.footer-bottom a:hover {
  color: #38BDF8;
}

/* ==========================================
   ANIMATIONS, PROGRESS BAR & DIVIDERS
   ========================================== */
.scroll-progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, #0866E8, #38BDF8, #0B2340);
  width: 0%;
  z-index: 9999;
  box-shadow: 0 0 10px rgba(8, 102, 232, 0.6);
  transition: width 0.08s ease-out;
}

.laser-divider {
  position: relative;
  height: 1px;
  background: var(--border-medium);
  overflow: hidden;
  width: 100%;
}

.laser-divider::after {
  content: '';
  position: absolute;
  top: 0;
  left: -25%;
  width: 25%;
  height: 100%;
  background: linear-gradient(90deg, transparent, #0866E8, #38BDF8, #0866E8, transparent);
  box-shadow: 0 0 8px rgba(8, 102, 232, 0.4);
  animation: laser-scan 4s infinite linear;
}

@keyframes laser-scan {
  0% { left: -25%; }
  100% { left: 125%; }
}

/* Reveal Transitions */
.reveal {
  opacity: 0;
  transform: translateY(35px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

.reveal-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity 0.85s cubic-bezier(0.16, 1, 0.3, 1), transform 0.85s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

.reveal-left.active {
  opacity: 1;
  transform: translateX(0);
}

.reveal-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.85s cubic-bezier(0.16, 1, 0.3, 1), transform 0.85s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

.reveal-right.active {
  opacity: 1;
  transform: translateX(0);
}

.reveal-scale {
  opacity: 0;
  transform: scale(0.92);
  transition: opacity 0.85s cubic-bezier(0.16, 1, 0.3, 1), transform 0.85s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

.reveal-scale.active {
  opacity: 1;
  transform: scale(1);
}

.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }
.delay-5 { transition-delay: 0.5s; }
.delay-6 { transition-delay: 0.6s; }



/* Additional Layout & Utility Classes */
.main-nav {
  display: flex;
  align-items: center;
}

.trust-text {
  display: flex;
  flex-direction: column;
}

.calc-inputs {
  display: flex;
  flex-direction: column;
}

/* ==========================================
   FAQ SECTION (CÂU HỎI THƯỜNG GẶP)
   ========================================== */
.faq-section {
  padding: 100px 0;
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-medium);
}

.faq-list {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: #FFFFFF;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
}

.faq-item:hover {
  border-color: var(--border-blue);
  box-shadow: var(--shadow-card);
}

.faq-item.active {
  border-color: var(--color-brand-blue);
  box-shadow: 0 6px 20px rgba(8, 102, 232, 0.08);
}

.faq-header {
  width: 100%;
  padding: 20px 24px;
  background: transparent;
  border: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  text-align: left;
  cursor: pointer;
  user-select: none;
  transition: background var(--transition-fast);
}

.faq-header:hover {
  background: var(--color-brand-blue-subtle);
}

.faq-question {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-navy);
  line-height: 1.45;
  transition: color var(--transition-fast);
}

.faq-item.active .faq-question {
  color: var(--color-brand-blue);
}

.faq-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--bg-secondary);
  border: 1px solid var(--border-medium);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-brand-blue);
  flex-shrink: 0;
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1), background var(--transition-fast);
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
  background: var(--color-brand-blue);
  color: #FFFFFF;
  border-color: var(--color-brand-blue);
}

.faq-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s ease;
  opacity: 0;
}

.faq-item.active .faq-body {
  max-height: 600px;
  opacity: 1;
}

.faq-answer {
  padding: 0 24px 24px 24px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
  border-top: 1px solid var(--border-subtle);
  padding-top: 18px;
}

.faq-answer strong {
  color: var(--color-navy);
}

/* ==========================================
   PROJECT IMAGE LIGHTBOX MODAL (Premium Glassmorphism)
   ========================================== */
.lightbox-modal {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.lightbox-modal.active {
  opacity: 1;
  pointer-events: auto;
}

.lightbox-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(11, 35, 64, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  cursor: pointer;
}

.lightbox-container {
  position: relative;
  z-index: 10;
  width: 100%;
  max-width: 1060px;
  max-height: 90vh;
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.45);
  border: 1px solid rgba(255, 255, 255, 0.3);
  overflow: hidden;
  transform: scale(0.92) translateY(15px);
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
}

.lightbox-modal.active .lightbox-container {
  transform: scale(1) translateY(0);
}

.lightbox-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(11, 35, 64, 0.65);
  backdrop-filter: blur(6px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #FFFFFF;
  font-size: 26px;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 20;
  transition: all var(--transition-fast);
}

.lightbox-close:hover {
  background: #E53E3E;
  border-color: #E53E3E;
  transform: rotate(90deg) scale(1.05);
}

.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.25);
  border: 1px solid var(--border-medium);
  color: var(--color-navy);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 15;
  transition: all var(--transition-fast);
}

.lightbox-nav:hover {
  background: var(--color-brand-blue);
  color: #FFFFFF;
  border-color: var(--color-brand-blue);
  transform: translateY(-50%) scale(1.1);
  box-shadow: 0 6px 20px rgba(8, 102, 232, 0.4);
}

.lightbox-prev {
  left: 20px;
}

.lightbox-next {
  right: 20px;
}

.lightbox-content {
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  max-height: 90vh;
  overflow: hidden;
}

.lightbox-image-wrap {
  position: relative;
  background: #061528;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 420px;
  max-height: 80vh;
  overflow: hidden;
}

#lightbox-img {
  width: 100%;
  height: 100%;
  max-height: 80vh;
  object-fit: contain;
  transition: opacity 0.25s ease;
}

.lightbox-info {
  padding: 36px 32px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow-y: auto;
  background: #FFFFFF;
}

.lightbox-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.lightbox-badge {
  background: var(--color-brand-blue-subtle);
  color: var(--color-brand-blue);
  border: 1px solid var(--border-blue);
  font-size: 0.775rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.lightbox-counter {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-muted);
}

.lightbox-title {
  font-size: 1.45rem;
  font-family: var(--font-heading);
  color: var(--color-navy);
  margin-bottom: 14px;
  line-height: 1.35;
}

.lightbox-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.65;
  margin-bottom: 24px;
}

.lightbox-meta {
  background: var(--bg-secondary);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  padding: 18px;
  margin-bottom: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.lightbox-meta-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.meta-label {
  font-size: 0.775rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 600;
}

.meta-val {
  font-size: 0.95rem;
  color: var(--text-primary);
  font-weight: 600;
}

.lightbox-action {
  margin-top: auto;
  padding-top: 16px;
}

/* ==========================================
   POLICY INFO MODALS (Bảo hành & Thanh toán)
   ========================================== */
.policy-modal {
  position: fixed;
  inset: 0;
  z-index: 9998;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.policy-modal.active {
  opacity: 1;
  pointer-events: auto;
}

.policy-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(11, 35, 64, 0.85);
  backdrop-filter: blur(8px);
  cursor: pointer;
}

.policy-dialog {
  position: relative;
  z-index: 10;
  width: 100%;
  max-width: 680px;
  max-height: 85vh;
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border-medium);
  overflow-y: auto;
  padding: 36px 32px;
  transform: translateY(20px);
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.policy-modal.active .policy-dialog {
  transform: translateY(0);
}

.policy-close {
  position: absolute;
  top: 18px;
  right: 18px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--bg-secondary);
  border: 1px solid var(--border-medium);
  color: var(--color-navy);
  font-size: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.policy-close:hover {
  background: #E53E3E;
  color: #FFFFFF;
  border-color: #E53E3E;
}

.policy-dialog h3 {
  font-family: var(--font-heading);
  font-size: 1.45rem;
  color: var(--color-navy);
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-brand-blue);
}

.policy-body {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.75;
}

.policy-body ul {
  margin: 12px 0 16px 20px;
}

.policy-body li {
  margin-bottom: 8px;
}

/* Responsive Media Queries */
@media (max-width: 1200px) {
  .nav-menu { gap: 10px; }
  .nav-link { font-size: 0.84rem; padding: 6px 2px; }
  .nav-hotline-compact { padding: 6px 10px; font-size: 0.8rem; }
}

@media (max-width: 1040px) {
  .nav-menu {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: #FFFFFF;
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    border-bottom: 1px solid var(--border-medium);
    box-shadow: var(--shadow-lg);
    transform: translateY(-130%);
    transition: transform var(--transition-normal);
    max-height: calc(100vh - var(--header-height));
    overflow-y: auto;
    z-index: 999;
  }
  .nav-menu.open { transform: translateY(0); }
  .mobile-toggle { display: block; }
  .nav-link { font-size: 1rem; padding: 8px 12px; width: 100%; }

  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .metrics-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .metric-item:nth-child(2)::after { display: none; }
  .calc-card { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero-trust-bar { grid-template-columns: repeat(2, 1fr); }
  .lightbox-content { grid-template-columns: 1.2fr 1fr; }
  .lightbox-info { padding: 24px; }
}

@media (max-width: 768px) {
  /* 1. Base Font Scaling & Typography */
  html {
    font-size: 14.5px;
  }

  /* 2. Hidden elements on mobile (Những thứ không cần thiết) */
  .top-bar,
  .scroll-progress-bar,
  #hero-sparks-canvas,
  .btn-back-to-top,
  .laser-divider,
  .nav-hotline-compact {
    display: none !important;
  }

  /* 3. Section Spacing */
  section,
  .about-section,
  .services-section,
  .gallery-section,
  .process-section,
  .calculator-section,
  .faq-section,
  .contact-section {
    padding: 44px 0 !important;
  }

  .container {
    padding-left: 16px !important;
    padding-right: 16px !important;
  }

  /* 4. Section Titles & Subtitles */
  .section-title-wrap {
    margin-bottom: 26px !important;
  }
  .section-title {
    font-size: 1.48rem !important;
    line-height: 1.25 !important;
    margin-top: 8px !important;
    margin-bottom: 8px !important;
    letter-spacing: -0.3px !important;
  }
  .section-subtitle {
    font-size: 0.85rem !important;
    line-height: 1.55 !important;
  }

  .badge-tech, .badge-blue {
    padding: 4px 12px !important;
    font-size: 0.72rem !important;
    letter-spacing: 0.4px !important;
  }

  /* 5. Hero Section */
  .hero {
    padding: 20px 0 28px 0 !important;
    min-height: auto !important;
    background: #FFFFFF !important;
    position: relative !important;
    overflow: hidden !important;
  }
  .hero-bg img {
    object-position: right top !important;
    height: 100% !important;
  }
  .hero-overlay {
    background: linear-gradient(
      to right,
      #FFFFFF 0%,
      #FFFFFF 36%,
      rgba(255, 255, 255, 0.96) 54%,
      rgba(255, 255, 255, 0.6) 72%,
      rgba(255, 255, 255, 0.12) 88%,
      rgba(255, 255, 255, 0) 100%
    ),
    linear-gradient(
      to bottom,
      rgba(255, 255, 255, 0) 0%,
      rgba(255, 255, 255, 0) 180px,
      rgba(255, 255, 255, 0.95) 240px,
      #FFFFFF 280px,
      #FFFFFF 100%
    ) !important;
  }
  .hero-badge {
    margin-bottom: 12px !important;
    font-size: 0.68rem !important;
    font-weight: 700 !important;
    padding: 4px 12px !important;
    background: #EFF6FF !important;
    border: 1px solid #BFDBFE !important;
    color: var(--color-brand-blue) !important;
    border-radius: 9999px !important;
    display: inline-flex !important;
    align-items: center !important;
    gap: 6px !important;
  }
  .hero-title {
    font-size: 1.62rem !important;
    line-height: 1.15 !important;
    letter-spacing: -0.5px !important;
    margin-bottom: 14px !important;
  }
  .hero-title .title-word {
    display: block !important;
  }
  .hero-title .title-dark {
    color: #0B2340 !important;
  }
  .hero-title .title-blue {
    color: var(--color-brand-blue) !important;
  }
  .hero-desc {
    font-size: 0.84rem !important;
    line-height: 1.55 !important;
    color: #334155 !important;
    margin-bottom: 20px !important;
  }
  .hero-buttons {
    display: flex !important;
    flex-direction: row !important;
    align-items: stretch !important;
    gap: 10px !important;
    margin-bottom: 22px !important;
    width: 100% !important;
  }
  .hero-buttons .btn {
    flex: 1 1 0% !important;
    width: auto !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    gap: 8px !important;
    padding: 12px 10px !important;
    font-size: 0.88rem !important;
    font-weight: 700 !important;
    border-radius: 10px !important;
    white-space: nowrap !important;
  }
  .hero-buttons .btn-cta {
    background: var(--color-brand-blue) !important;
    color: #FFFFFF !important;
    border: 1px solid var(--color-brand-blue) !important;
    box-shadow: 0 4px 14px rgba(8, 102, 232, 0.35) !important;
  }
  .hero-buttons .btn-zalo-outline {
    background: #FFFFFF !important;
    color: var(--color-brand-blue) !important;
    border: 1.5px solid var(--color-brand-blue) !important;
    box-shadow: 0 2px 8px rgba(11, 35, 64, 0.04) !important;
  }

  /* Compact Hero Trust Bar (2x2 Grid chuẩn mockup) */
  .hero-trust-bar {
    display: grid !important;
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 10px !important;
    padding: 0 !important;
    background: transparent !important;
    border: none !important;
  }
  .trust-item {
    display: flex !important;
    align-items: center !important;
    gap: 8px !important;
    background: #FFFFFF !important;
    border: 1px solid #E2E8F0 !important;
    border-radius: 12px !important;
    padding: 11px 9px !important;
    box-shadow: 0 2px 8px rgba(11, 35, 64, 0.04) !important;
  }
  .trust-icon-box {
    width: 32px !important;
    height: 32px !important;
    border-radius: 8px !important;
    background: #EFF6FF !important;
    border: 1px solid #DBEAFE !important;
    color: var(--color-brand-blue) !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    flex-shrink: 0 !important;
  }
  .trust-icon-box svg {
    width: 15px !important;
    height: 15px !important;
  }
  .trust-text {
    flex: 1 !important;
    min-width: 0 !important;
  }
  .trust-title {
    font-size: 0.74rem !important;
    font-weight: 700 !important;
    color: #0F172A !important;
    line-height: 1.25 !important;
    white-space: normal !important;
  }
  .trust-desc {
    font-size: 0.63rem !important;
    color: #64748B !important;
    line-height: 1.25 !important;
    white-space: normal !important;
    margin-top: 2px !important;
  }
  .trust-chevron {
    display: flex !important;
    align-items: center !important;
    color: #94A3B8 !important;
    flex-shrink: 0 !important;
  }
  .trust-chevron svg {
    width: 14px !important;
    height: 14px !important;
  }

  /* 6. Metrics Grid */
  .metrics-grid {
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 16px !important;
  }
  .metric-item::after { display: none !important; }
  .metric-number {
    font-size: 1.85rem !important;
  }
  .metric-label {
    font-size: 0.78rem !important;
  }

  /* 7. About Section on Mobile (Chuẩn Mockup 1) */
  .about-grid {
    display: flex !important;
    flex-direction: column !important;
    gap: 0 !important;
  }
  .about-image-wrapper {
    display: none !important;
  }
  .about-content {
    text-align: center !important;
    width: 100% !important;
    padding: 0 !important;
  }
  .about-pill-center {
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    margin: 0 auto 12px auto !important;
    padding: 5px 16px !important;
    background: #EFF6FF !important;
    border: 1px solid #BFDBFE !important;
    border-radius: 9999px !important;
    color: #0066CC !important;
    font-size: 0.72rem !important;
    font-weight: 700 !important;
    letter-spacing: 0.4px !important;
    text-transform: uppercase !important;
  }
  .about-main-title {
    font-size: 1.42rem !important;
    font-weight: 800 !important;
    color: #0F172A !important;
    text-transform: uppercase !important;
    text-align: center !important;
    line-height: 1.35 !important;
    letter-spacing: -0.2px !important;
    margin: 0 auto 12px auto !important;
    max-width: 100% !important;
  }
  .about-pill-sub {
    margin-top: 2px !important;
    margin-bottom: 16px !important;
  }
  .about-lead {
    font-size: 0.88rem !important;
    line-height: 1.6 !important;
    color: #334155 !important;
    text-align: justify !important;
    margin-bottom: 12px !important;
  }
  .about-p {
    font-size: 0.82rem !important;
    line-height: 1.55 !important;
    color: #475569 !important;
    text-align: justify !important;
    margin-bottom: 20px !important;
  }
  .about-features-list {
    display: flex !important;
    flex-direction: column !important;
    gap: 14px !important;
    margin: 20px 0 !important;
    width: 100% !important;
  }
  .about-feature {
    display: flex !important;
    align-items: flex-start !important;
    gap: 12px !important;
    text-align: left !important;
  }
  .about-feature-icon {
    width: 22px !important;
    height: 22px !important;
    min-width: 22px !important;
    border-radius: 50% !important;
    background: #E0F2FE !important;
    color: #0284C7 !important;
    border: none !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    font-size: 13px !important;
    font-weight: 800 !important;
    margin-top: 2px !important;
    flex-shrink: 0 !important;
  }
  .about-feature-text {
    flex: 1 !important;
    min-width: 0 !important;
  }
  .about-feature-text h4 {
    font-size: 0.92rem !important;
    font-weight: 700 !important;
    color: #0F172A !important;
    margin: 0 0 2px 0 !important;
    line-height: 1.35 !important;
  }
  .about-feature-text p {
    font-size: 0.82rem !important;
    line-height: 1.45 !important;
    color: #64748B !important;
    margin: 0 !important;
  }
  .about-cta-wrap {
    margin-top: 24px !important;
    margin-bottom: 8px !important;
    display: flex !important;
    justify-content: center !important;
    width: 100% !important;
  }
  .btn-about-cta {
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    width: 100% !important;
    max-width: 380px !important;
    padding: 14px 20px !important;
    background: #0066CC !important;
    color: #FFFFFF !important;
    font-size: 0.94rem !important;
    font-weight: 700 !important;
    text-transform: uppercase !important;
    letter-spacing: 0.5px !important;
    border-radius: 8px !important;
    border: none !important;
    box-shadow: 0 4px 16px rgba(0, 102, 204, 0.35) !important;
    text-decoration: none !important;
    transition: all 0.2s ease !important;
  }
  .btn-about-cta:active {
    transform: scale(0.98) !important;
    background: #0052A3 !important;
  }

  /* 8. Services Section (2-Column Grid on Mobile - Chuẩn Mockup 2) */
  .services-grid {
    display: grid !important;
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 12px !important;
  }
  .service-card {
    display: flex !important;
    flex-direction: column !important;
    padding: 0 !important;
    border-radius: 12px !important;
    overflow: hidden !important;
    background: #FFFFFF !important;
    border: 1px solid #E2E8F0 !important;
    box-shadow: 0 2px 8px rgba(11, 35, 64, 0.04) !important;
  }
  .service-thumb {
    position: relative !important;
    width: 100% !important;
    height: 120px !important;
    overflow: hidden !important;
  }
  .service-thumb img {
    width: 100% !important;
    height: 100% !important;
    object-fit: cover !important;
  }
  .service-category-tag {
    position: absolute !important;
    top: 8px !important;
    left: 8px !important;
    background: rgba(15, 23, 42, 0.78) !important;
    backdrop-filter: blur(4px) !important;
    color: #FFFFFF !important;
    font-size: 0.62rem !important;
    font-weight: 700 !important;
    padding: 2px 7px !important;
    border-radius: 4px !important;
    letter-spacing: 0.2px !important;
  }
  .service-body {
    padding: 10px 10px 12px 10px !important;
    display: flex !important;
    flex-direction: column !important;
    flex: 1 !important;
  }
  .service-body h3 {
    font-size: 0.86rem !important;
    line-height: 1.25 !important;
    font-weight: 700 !important;
    color: #0F172A !important;
    margin: 0 0 4px 0 !important;
    display: -webkit-box !important;
    -webkit-line-clamp: 2 !important;
    -webkit-box-orient: vertical !important;
    overflow: hidden !important;
  }
  .service-body p {
    font-size: 0.72rem !important;
    line-height: 1.4 !important;
    color: #64748B !important;
    display: -webkit-box !important;
    -webkit-line-clamp: 2 !important;
    -webkit-box-orient: vertical !important;
    overflow: hidden !important;
    margin-bottom: 8px !important;
  }
  .service-specs {
    display: flex !important;
    flex-wrap: wrap !important;
    gap: 4px !important;
    margin-top: auto !important;
    margin-bottom: 8px !important;
  }
  .service-specs .spec-pill {
    font-size: 0.62rem !important;
    padding: 2px 6px !important;
    background: #F1F5F9 !important;
    color: #475569 !important;
    border-radius: 4px !important;
    white-space: nowrap !important;
  }
  .service-link {
    font-size: 0.74rem !important;
    font-weight: 600 !important;
    color: #0066CC !important;
    display: flex !important;
    align-items: center !important;
    gap: 4px !important;
    text-decoration: none !important;
  }

  /* 9. Filter Tabs (Giữ nguyên 8 danh mục - Cuộn ngang mượt mà trên Mobile) */
  .filter-tabs {
    flex-wrap: nowrap !important;
    overflow-x: auto !important;
    justify-content: flex-start !important;
    padding: 2px 2px 10px 2px !important;
    margin-bottom: 20px !important;
    gap: 8px !important;
    -webkit-overflow-scrolling: touch !important;
    scrollbar-width: none !important;
  }
  .filter-tabs::-webkit-scrollbar { display: none !important; }
  .filter-btn {
    white-space: nowrap !important;
    padding: 7px 14px !important;
    font-size: 0.8rem !important;
    font-weight: 600 !important;
    flex-shrink: 0 !important;
    border-radius: 8px !important;
  }
  .filter-btn.active {
    background: #0066CC !important;
    color: #FFFFFF !important;
    border-color: #0066CC !important;
    box-shadow: 0 2px 8px rgba(0, 102, 204, 0.3) !important;
  }

  /* 10. Product Grid (2-Column Grid on Mobile - Chuẩn Mockup 2) */
  .product-grid {
    display: grid !important;
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 12px !important;
  }
  .product-item {
    display: flex;
    flex-direction: column;
    border-radius: 12px;
    overflow: hidden;
    background: #FFFFFF;
    border: 1px solid #E2E8F0;
    box-shadow: 0 2px 8px rgba(11, 35, 64, 0.04);
  }
  .product-item.is-hidden {
    display: none !important;
  }
  .product-image {
    position: relative !important;
    width: 100% !important;
    height: 120px !important;
    overflow: hidden !important;
  }
  .product-image img {
    width: 100% !important;
    height: 100% !important;
    object-fit: cover !important;
  }
  .product-badge {
    position: absolute !important;
    top: 8px !important;
    left: 8px !important;
    background: rgba(15, 23, 42, 0.78) !important;
    backdrop-filter: blur(4px) !important;
    color: #FFFFFF !important;
    font-size: 0.62rem !important;
    font-weight: 700 !important;
    padding: 2px 7px !important;
    border-radius: 4px !important;
    z-index: 2 !important;
  }
  .product-info {
    padding: 10px 10px 12px 10px !important;
    display: flex !important;
    flex-direction: column !important;
    flex: 1 !important;
  }
  .product-info h4 {
    font-size: 0.84rem !important;
    line-height: 1.25 !important;
    font-weight: 700 !important;
    color: #0F172A !important;
    margin: 0 0 4px 0 !important;
    display: -webkit-box !important;
    -webkit-line-clamp: 2 !important;
    -webkit-box-orient: vertical !important;
    overflow: hidden !important;
  }
  .product-desc {
    font-size: 0.72rem !important;
    line-height: 1.35 !important;
    color: #64748B !important;
    display: -webkit-box !important;
    -webkit-line-clamp: 2 !important;
    -webkit-box-orient: vertical !important;
    overflow: hidden !important;
    margin-bottom: 6px !important;
  }
  .product-meta {
    margin-top: auto !important;
    display: flex !important;
    justify-content: space-between !important;
    align-items: center !important;
    gap: 4px !important;
  }
  .product-spec {
    font-size: 0.64rem !important;
    color: #64748B !important;
    white-space: nowrap !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
    max-width: 65% !important;
  }
  .product-loc {
    font-size: 0.64rem !important;
    font-weight: 700 !important;
    color: #0066CC !important;
    white-space: nowrap !important;
  }

  /* Load More & Progress Bar */
  .gallery-load-more-wrap {
    margin-top: 24px !important;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    width: 100%;
  }
  .gallery-load-more-wrap.is-hidden {
    display: none !important;
  }
  .btn-load-more {
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    gap: 8px !important;
    background: #0066CC !important;
    color: #FFFFFF !important;
    font-size: 0.9rem !important;
    font-weight: 700 !important;
    padding: 12px 28px !important;
    border-radius: 8px !important;
    border: none !important;
    box-shadow: 0 4px 14px rgba(0, 102, 204, 0.3) !important;
    width: auto !important;
    min-width: 200px !important;
    cursor: pointer !important;
    transition: all 0.2s ease !important;
  }
  .btn-load-more:active {
    transform: scale(0.98) !important;
  }
  .gallery-progress-wrap {
    width: 100% !important;
    max-width: 320px !important;
    text-align: center !important;
  }
  .gallery-counter-status {
    font-size: 0.78rem !important;
    color: #64748B !important;
    margin-bottom: 6px !important;
  }
  .gallery-progress-bar {
    width: 100% !important;
    height: 5px !important;
    background: #E2E8F0 !important;
    border-radius: 9999px !important;
    overflow: hidden !important;
  }
  .gallery-progress-fill {
    height: 100% !important;
    background: #0066CC !important;
    border-radius: 9999px !important;
    transition: width 0.3s ease !important;
  }

  /* 9. Process Section (Chuẩn Phone 1 Mockup: 2 Cột Đối Xứng) */
  .process-section {
    padding: 38px 0 !important;
  }
  .process-grid {
    display: grid !important;
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 10px !important;
  }
  .process-step {
    background: #FFFFFF !important;
    border: 1px solid #E2E8F0 !important;
    border-radius: 12px !important;
    padding: 14px 10px !important;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.03) !important;
    display: flex !important;
    flex-direction: column !important;
    justify-content: flex-start !important;
    text-align: left !important;
    transition: transform 0.2s ease, border-color 0.2s ease !important;
  }
  .process-step:active {
    border-color: #93C5FD !important;
    transform: translateY(-2px) !important;
  }
  .step-number {
    font-size: 1.6rem !important;
    font-weight: 800 !important;
    color: #0066CC !important;
    font-family: 'Outfit', sans-serif !important;
    line-height: 1 !important;
    margin-bottom: 6px !important;
  }
  .process-step h3 {
    font-size: 0.86rem !important;
    font-weight: 700 !important;
    color: #0F172A !important;
    margin-bottom: 5px !important;
    line-height: 1.3 !important;
  }
  .process-step p {
    font-size: 0.72rem !important;
    color: #64748B !important;
    line-height: 1.4 !important;
    margin: 0 !important;
  }

  /* 10. Calculator Section (Chuẩn Phone 2 Mockup: Thẻ Trắng Gọn Gàng) */
  .calculator-section {
    padding: 38px 0 !important;
  }
  .calc-card {
    grid-template-columns: 1fr !important;
    padding: 18px 14px !important;
    gap: 16px !important;
    background: #FFFFFF !important;
    border: 1px solid #E2E8F0 !important;
    border-radius: 14px !important;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.04) !important;
  }
  .calc-form-group {
    margin-bottom: 12px !important;
  }
  .calc-form-group label {
    font-size: 0.82rem !important;
    font-weight: 600 !important;
    color: #334155 !important;
    margin-bottom: 5px !important;
    display: block !important;
  }
  .calc-select, .calc-input {
    width: 100% !important;
    font-size: 0.84rem !important;
    padding: 10px 12px !important;
    border-radius: 10px !important;
    border: 1px solid #CBD5E1 !important;
    background: #F8FAFC !important;
    color: #0F172A !important;
  }
  .calc-select:focus, .calc-input:focus {
    border-color: #0066CC !important;
    background: #FFFFFF !important;
    outline: none !important;
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.12) !important;
  }
  .calc-summary-box {
    background: #F0F7FF !important;
    border: 1px solid #BFDBFE !important;
    border-radius: 12px !important;
    padding: 16px 14px !important;
  }
  .calc-price-display {
    background: #FFFFFF !important;
    border: 1px solid #DBEAFE !important;
    border-radius: 10px !important;
    padding: 12px 14px !important;
    margin: 12px 0 !important;
    text-align: center !important;
  }
  .calc-price-label {
    font-size: 0.72rem !important;
    font-weight: 700 !important;
    color: #0066CC !important;
    text-transform: uppercase !important;
    letter-spacing: 0.5px !important;
  }
  .calc-price-val {
    font-size: 1.65rem !important;
    font-weight: 900 !important;
    color: #0052A3 !important;
    font-family: 'Outfit', sans-serif !important;
  }

  /* 11. FAQ Section (Chuẩn Phone 2 Mockup: Thẻ Accordion Tròn Từng Mục) */
  .faq-section {
    padding: 38px 0 !important;
  }
  .faq-list {
    display: flex !important;
    flex-direction: column !important;
    gap: 8px !important;
  }
  .faq-item {
    background: #FFFFFF !important;
    border: 1px solid #E2E8F0 !important;
    border-radius: 10px !important;
    margin-bottom: 0 !important;
    overflow: hidden !important;
    transition: border-color 0.25s ease, box-shadow 0.25s ease !important;
  }
  .faq-item.active {
    border-color: #93C5FD !important;
    box-shadow: 0 3px 10px rgba(0, 102, 204, 0.08) !important;
  }
  .faq-header {
    width: 100% !important;
    display: flex !important;
    align-items: center !important;
    justify-content: space-between !important;
    padding: 12px 14px !important;
    background: transparent !important;
    border: none !important;
    text-align: left !important;
    cursor: pointer !important;
  }
  .faq-question {
    font-size: 0.84rem !important;
    font-weight: 600 !important;
    color: #1E293B !important;
    line-height: 1.4 !important;
    padding-right: 8px !important;
  }
  .faq-icon {
    width: 24px !important;
    height: 24px !important;
    border-radius: 50% !important;
    background: #F1F5F9 !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    color: #0066CC !important;
    flex-shrink: 0 !important;
    transition: transform 0.25s ease, background 0.25s ease !important;
  }
  .faq-item.active .faq-icon {
    transform: rotate(180deg) !important;
    background: #EFF6FF !important;
  }
  .faq-body {
    display: none !important;
  }
  .faq-item.active .faq-body {
    display: block !important;
  }
  .faq-answer {
    padding: 0 14px 14px 14px !important;
    font-size: 0.78rem !important;
    color: #475569 !important;
    line-height: 1.5 !important;
  }

  /* 12. Contact Form & Hotline (Chuẩn Phone 3 Mockup) */
  .contact-section {
    padding: 38px 0 !important;
  }
  .contact-grid {
    display: flex !important;
    flex-direction: column !important;
    gap: 18px !important;
  }
  .contact-form {
    order: 1 !important;
    background: #FFFFFF !important;
    border: 1px solid #E2E8F0 !important;
    border-radius: 14px !important;
    padding: 18px 14px !important;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.03) !important;
  }
  .contact-form h3 {
    font-size: 1.25rem !important;
    margin-bottom: 16px !important;
  }
  .form-row {
    grid-template-columns: 1fr !important;
    gap: 12px !important;
  }
  .form-group {
    margin-bottom: 12px !important;
  }
  .form-group label {
    font-size: 0.8rem !important;
    font-weight: 600 !important;
    color: #334155 !important;
    margin-bottom: 5px !important;
    display: block !important;
  }
  .form-control {
    width: 100% !important;
    font-size: 0.84rem !important;
    padding: 10px 12px !important;
    border-radius: 10px !important;
    border: 1px solid #CBD5E1 !important;
    background: #F8FAFC !important;
    color: #0F172A !important;
  }
  .form-control:focus {
    border-color: #0066CC !important;
    background: #FFFFFF !important;
    outline: none !important;
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.12) !important;
  }
  .contact-info-card {
    order: 2 !important;
    background: #F8FAFC !important;
    border: 1px solid #E2E8F0 !important;
    border-radius: 14px !important;
    padding: 18px 14px !important;
  }
  .contact-item {
    margin-bottom: 14px !important;
  }
  .contact-item .contact-icon {
    width: 38px !important;
    height: 38px !important;
    border-radius: 10px !important;
    background: rgba(239, 68, 68, 0.08) !important;
    border-color: rgba(239, 68, 68, 0.2) !important;
    color: #EF4444 !important;
  }

  /* 13. Footer Accordion (Chuẩn Phone 3 Mockup) */
  .footer {
    background: #0B192C !important;
    color: #E2E8F0 !important;
    padding: 32px 0 20px 0 !important;
  }
  .footer-grid {
    display: flex !important;
    flex-direction: column !important;
    gap: 0 !important;
    margin-bottom: 20px !important;
  }
  .footer-col {
    border-bottom: 1px solid rgba(255, 255, 255, 0.08) !important;
    padding: 0 !important;
  }
  .footer-col-header {
    width: 100% !important;
    display: flex !important;
    align-items: center !important;
    justify-content: space-between !important;
    padding: 13px 0 !important;
    background: transparent !important;
    border: none !important;
    color: #FFFFFF !important;
    font-size: 0.92rem !important;
    font-weight: 700 !important;
    cursor: pointer !important;
    text-align: left !important;
    margin-bottom: 0 !important;
  }
  .footer-col-header::after {
    display: none !important;
  }
  .footer-chevron {
    color: #93C5FD !important;
    display: flex !important;
    transition: transform 0.25s ease !important;
  }
  .footer-col.active .footer-chevron {
    transform: rotate(180deg) !important;
  }
  .footer-col-body {
    display: none !important;
    padding-bottom: 14px !important;
  }
  .footer-col.active .footer-col-body {
    display: block !important;
  }
  .footer-links li {
    margin-bottom: 8px !important;
  }
  .footer-links a {
    font-size: 0.8rem !important;
    color: #94A3B8 !important;
  }
  .footer-hotlines-list {
    display: flex !important;
    flex-direction: column !important;
    gap: 10px !important;
    margin-top: 14px !important;
    padding-top: 14px !important;
    border-top: 1px solid rgba(255, 255, 255, 0.08) !important;
  }
  .footer-hotline-row {
    display: flex !important;
    align-items: center !important;
    gap: 10px !important;
    color: #93C5FD !important;
    text-decoration: none !important;
    font-size: 0.84rem !important;
  }
  .footer-hotline-row strong {
    color: #FFFFFF !important;
  }
  .footer-bottom {
    margin-top: 20px !important;
    padding-top: 14px !important;
    font-size: 0.72rem !important;
    border-top: 1px solid rgba(255, 255, 255, 0.08) !important;
  }

  /* Floating Phone Widget - Hidden on Mobile (Replaced by Mobile Bottom Dock) */
  .floating-contact-corner {
    display: none !important;
  }

  /* Lightbox Mobile Layout */
  .lightbox-modal { padding: 8px !important; }
  .lightbox-container { max-height: 94vh !important; }
  .lightbox-content {
    grid-template-columns: 1fr !important;
    max-height: 94vh !important;
    overflow-y: auto !important;
  }
  .lightbox-image-wrap {
    min-height: 220px !important;
    max-height: 280px !important;
  }
  #lightbox-img {
    max-height: 280px !important;
  }
  .lightbox-info {
    padding: 16px 14px !important;
  }
  .lightbox-title { font-size: 1.05rem !important; }
  .lightbox-desc { font-size: 0.8rem !important; }
}

@media (max-width: 480px) {
  html {
    font-size: 13.8px;
  }
  .header {
    height: 60px !important;
  }
  .logo-title {
    font-size: 1.05rem !important;
  }
  .logo-text-sub {
    font-size: 0.62rem !important;
  }
  .logo-img {
    width: 36px !important;
    height: 36px !important;
  }
  .hero-title {
    font-size: 1.55rem !important;
    line-height: 1.15 !important;
  }
  .hero-title .title-word {
    display: block !important;
  }
  .hero-desc {
    font-size: 0.82rem !important;
  }
  .hero-buttons {
    display: flex !important;
    flex-direction: row !important;
    gap: 8px !important;
  }
  .hero-buttons .btn {
    flex: 1 1 0% !important;
    padding: 11px 6px !important;
    font-size: 0.82rem !important;
  }
  .section-title {
    font-size: 1.25rem !important;
  }
  .hero-trust-bar {
    grid-template-columns: 1fr 1fr !important;
    gap: 8px !important;
    padding: 0 !important;
  }
  .trust-item {
    padding: 10px 8px !important;
    gap: 6px !important;
  }
  .trust-icon-box {
    width: 28px !important;
    height: 28px !important;
  }
  .trust-icon-box svg {
    width: 14px !important;
    height: 14px !important;
  }
  .trust-title {
    font-size: 0.72rem !important;
  }
  .trust-desc {
    font-size: 0.6rem !important;
  }
  .metrics-grid {
    grid-template-columns: 1fr 1fr !important;
    gap: 12px !important;
  }
  .metric-number {
    font-size: 1.65rem !important;
  }
  .metric-label {
    font-size: 0.74rem !important;
  }
  .floating-contact-corner {
    display: none !important;
  }
}

/* ==========================================
   FLOATING ACTION BUTTONS (Desktop Floating Corner & Back To Top)
   ========================================== */
.mobile-bottom-dock,
.floating-mobile-actions {
  display: none;
}

/* Desktop Floating Contact Corner - STRICTLY DOCKED TO BOTTOM RIGHT */
.floating-contact-corner {
  position: fixed !important;
  right: 26px !important;
  bottom: 26px !important;
  left: auto !important;
  top: auto !important;
  width: auto !important;
  max-width: max-content !important;
  display: flex !important;
  flex-direction: column !important;
  align-items: flex-end !important;
  gap: 14px !important;
  z-index: 998 !important;
  pointer-events: none !important;
}

.floating-contact-corner > a {
  pointer-events: auto !important;
}

.btn-float-zalo,
.btn-float-phone {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.25s ease;
}

/* Zalo Floating Button */
.btn-float-zalo {
  background: linear-gradient(135deg, #0088FF 0%, #0060E6 100%);
  box-shadow: 0 6px 20px rgba(0, 104, 255, 0.42), 0 2px 6px rgba(0, 0, 0, 0.08);
}

.btn-float-zalo:hover {
  transform: translateY(-2px) scale(1.08);
  box-shadow: 0 10px 28px rgba(0, 104, 255, 0.6);
}

/* Hotline Phone Floating Button */
.btn-float-phone {
  background: linear-gradient(135deg, #0066CC 0%, #004C99 100%);
  color: #FFFFFF;
  box-shadow: 0 6px 20px rgba(0, 102, 204, 0.42), 0 2px 6px rgba(0, 0, 0, 0.08);
}

.btn-float-phone:hover {
  transform: translateY(-2px) scale(1.08);
  box-shadow: 0 10px 28px rgba(0, 102, 204, 0.6);
  color: #FFFFFF;
}

/* Tooltip hiển thị khi hover trên Desktop */
.float-tooltip {
  position: absolute;
  right: calc(100% + 12px);
  top: 50%;
  transform: translateY(-50%) translateX(6px);
  background: rgba(11, 35, 64, 0.94);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: #FFFFFF;
  font-size: 0.8rem;
  font-weight: 700;
  white-space: nowrap;
  padding: 6px 12px;
  border-radius: 8px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.22);
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
  transition: all 0.22s cubic-bezier(0.16, 1, 0.3, 1);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.float-tooltip::after {
  content: '';
  position: absolute;
  left: 100%;
  top: 50%;
  transform: translateY(-50%);
  border-width: 5px;
  border-style: solid;
  border-color: transparent transparent transparent rgba(11, 35, 64, 0.94);
}

.btn-float-zalo:hover .float-tooltip,
.btn-float-phone:hover .float-tooltip {
  opacity: 1;
  visibility: visible;
  transform: translateY(-50%) translateX(0);
}

/* Ripple Pulse Rings for Phone */
.phone-pulse-ring {
  position: absolute;
  inset: -6px;
  border: 2px solid rgba(0, 102, 204, 0.65);
  border-radius: 50%;
  animation: pulse-ring-call 2.2s cubic-bezier(0.215, 0.61, 0.355, 1) infinite;
  pointer-events: none;
}

.phone-pulse-ring.delay {
  animation-delay: 1.1s;
}

@keyframes pulse-ring-call {
  0% {
    transform: scale(0.85);
    opacity: 0.9;
  }
  100% {
    transform: scale(1.48);
    opacity: 0;
  }
}

/* Back To Top Button - Nằm phía trên widget nổi, không bị đè */
.btn-back-to-top {
  position: fixed !important;
  bottom: 156px !important;
  right: 26px !important;
  left: auto !important;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(8px);
  color: var(--color-navy);
  border: 1px solid var(--border-medium);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 14px rgba(11, 35, 64, 0.08);
  cursor: pointer;
  z-index: 997;
  opacity: 0;
  pointer-events: none;
  transition: all 0.25s ease;
}

.btn-back-to-top.visible {
  opacity: 1;
  pointer-events: auto;
}

.btn-back-to-top:hover {
  background: var(--color-brand-blue);
  color: #FFFFFF;
  border-color: var(--color-brand-blue);
  transform: translateY(-3px);
  box-shadow: 0 6px 18px rgba(8, 102, 232, 0.3);
}

@media (max-width: 768px) {
  body {
    padding-bottom: 74px !important;
  }

  .floating-contact-corner {
    display: none !important;
  }

  .btn-back-to-top {
    bottom: 78px !important;
    right: 70px !important;
  }

  /* Floating Mobile Actions (Zalo & CALL - Chuẩn Góc Dưới Điện Thoại) */
  .floating-mobile-actions {
    display: flex !important;
    position: fixed !important;
    bottom: 74px !important;
    right: 14px !important;
    flex-direction: column !important;
    gap: 9px !important;
    z-index: 998 !important;
    align-items: center !important;
  }

  .btn-floating-action {
    width: 48px !important;
    height: 48px !important;
    border-radius: 50% !important;
    display: flex !important;
    flex-direction: column !important;
    align-items: center !important;
    justify-content: center !important;
    text-decoration: none !important;
    transition: transform 0.18s ease, box-shadow 0.18s ease !important;
  }

  .btn-floating-action:active {
    transform: scale(0.92) !important;
  }

  /* Nút Zalo Nổi */
  .btn-floating-zalo {
    background: linear-gradient(135deg, #0088FF 0%, #0060E6 100%) !important;
    box-shadow: 0 4px 14px rgba(0, 104, 255, 0.45) !important;
  }

  /* Nút CALL Nổi */
  .btn-floating-call {
    background: linear-gradient(135deg, #0066CC 0%, #004C99 100%) !important;
    color: #FFFFFF !important;
    box-shadow: 0 4px 14px rgba(0, 102, 204, 0.45) !important;
  }

  .action-badge-text {
    font-size: 8.5px !important;
    font-weight: 800 !important;
    letter-spacing: 0.4px !important;
    margin-top: 1px !important;
    line-height: 1 !important;
    color: #FFFFFF !important;
    font-family: 'Outfit', sans-serif !important;
  }

  .footer-zalo-row {
    color: #60A5FA !important;
  }

  /* Mobile Bottom Dock (Phone 1 & 2 Mockup: [ Tổng Chi Phí ] [ Gửi Yêu Cầu 📞 ]) */
  .mobile-bottom-dock {
    display: flex !important;
    align-items: center !important;
    justify-content: space-between !important;
    position: fixed !important;
    bottom: 0 !important;
    left: 0 !important;
    right: 0 !important;
    height: 60px !important;
    background: rgba(255, 255, 255, 0.98) !important;
    backdrop-filter: blur(14px) !important;
    -webkit-backdrop-filter: blur(14px) !important;
    border-top: 1px solid #E2E8F0 !important;
    padding: 0 16px !important;
    gap: 12px !important;
    z-index: 999 !important;
    box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.06) !important;
  }

  .dock-action-btn {
    flex: 1 !important;
    height: 42px !important;
    border-radius: 9999px !important;
    font-size: 0.88rem !important;
    font-weight: 700 !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    gap: 6px !important;
    text-decoration: none !important;
    transition: all 0.2s ease !important;
    cursor: pointer !important;
  }

  .dock-btn-calc {
    background: #EFF6FF !important;
    border: 1.5px solid #93C5FD !important;
    color: #0066CC !important;
  }

  .dock-btn-calc:active {
    background: #DBEAFE !important;
    transform: scale(0.97) !important;
  }

  .dock-btn-quote {
    background: linear-gradient(135deg, #0066CC 0%, #004C99 100%) !important;
    border: none !important;
    color: #FFFFFF !important;
    box-shadow: 0 3px 10px rgba(0, 102, 204, 0.35) !important;
  }

  .dock-btn-quote:active {
    transform: scale(0.97) !important;
    box-shadow: 0 1px 4px rgba(0, 102, 204, 0.2) !important;
  }
}