/* ==========================================================================
   THẾ GIỚI SẮT MỸ THUẬT - LUXURY DESIGN SYSTEM & STYLESHEET
   Chuẩn SEO / GEO / AIO / AEO - Tinh hoa nghệ thuật kim khí hoàng gia
   ========================================================================== */

:root {
  /* OFFICIAL BRAND IDENTITY PALETTE - THẾ GIỚI SẮT MỸ THUẬT */
  --color-gold-primary: #A67C35;   /* Vàng đồng chủ đạo: Chữ "SẮT MỸ THUẬT", họa tiết cổng, điểm nhấn */
  --color-charcoal: #262626;       /* Đen than: Khung cổng, chữ "THẾ GIỚI", tiêu đề */
  --color-gold-light: #C5A261;     /* Vàng đồng sáng: Chi tiết nhấn sáng, viền trang trí */
  --color-bronze-dark: #795822;    /* Đồng đậm: Chi tiết tối của họa tiết vàng */
  --color-white: #FFFFFF;          /* Trắng: Nền logo, nền website */
  --color-ivory: #F7F4EE;          /* Trắng ngà: Nền phụ trên ấn phẩm và website */

  /* UI Tokens */
  --bg-dark: #262626;
  --bg-darker: #1a1a1a;
  --bg-surface: #FFFFFF;
  --bg-card: #FFFFFF;
  --bg-card-hover: #F7F4EE;
  --bg-light: #F7F4EE;
  --bg-white: #FFFFFF;
  --bg-ivory: #F7F4EE;
  
  --primary-gold: #A67C35;
  --primary-gold-light: #C5A261;
  --primary-gold-dark: #795822;
  --primary-orange: #E65100;
  --primary-orange-hover: #BF360C;
  --gold-gradient: linear-gradient(135deg, #C5A261 0%, #A67C35 50%, #795822 100%);
  --gold-gradient-shine: linear-gradient(90deg, #A67C35 0%, #C5A261 50%, #A67C35 100%);
  --royal-glass: rgba(247, 244, 238, 0.94);
  
  --text-main: #262626;
  --text-muted: #595959;
  --text-dark: #262626;
  --text-gold: #A67C35;
  
  --border-gold: rgba(166, 124, 53, 0.4);
  --border-gold-subtle: rgba(166, 124, 53, 0.2);
  --border-subtle: rgba(38, 38, 38, 0.1);
  --border-light: #EAE6DF;
  
  --shadow-gold: 0 8px 24px rgba(166, 124, 53, 0.18);
  --shadow-card: 0 8px 24px rgba(38, 38, 38, 0.08);
  --shadow-glow: 0 0 25px rgba(197, 162, 97, 0.35);
  
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 8px;
  --radius-full: 8px;
  
  /* Font Roboto toàn trang */
  --font-sans: 'Roboto', sans-serif;
  --font-serif: 'Roboto', sans-serif;
  
  --transition: all 0.28s cubic-bezier(0.165, 0.84, 0.44, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  font-family: 'Roboto', sans-serif;
}

body {
  font-family: 'Roboto', sans-serif;
  background-color: var(--color-white);
  color: var(--color-charcoal);
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Roboto', sans-serif;
  font-weight: 700;
  color: var(--color-charcoal);
}

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

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

button, input, select, textarea {
  font-family: inherit;
  font-size: 1rem;
}

.container {
  width: 100%;
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Typography Utilities */
.gold-text {
  background: var(--gold-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.title-serif {
  font-family: var(--font-serif);
  letter-spacing: 0.5px;
}

.section-header {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 50px;
}

.section-subtitle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--primary-gold);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2.5px;
  margin-bottom: 12px;
  background: rgba(166, 124, 53, 0.08);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-gold);
}

.section-title {
  font-size: 2.35rem;
  font-weight: 700;
  color: var(--color-charcoal);
  line-height: 1.3;
  margin-bottom: 16px;
}

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

/* ==========================================================================
   TOP BAR & HEADER
   ========================================================================== */
/* ==========================================================================
   TOP BAR & HEADER
   ========================================================================== */
.topbar {
  background-color: var(--color-charcoal);
  border-bottom: 1px solid rgba(166, 124, 53, 0.25);
  padding: 8px 0;
  font-size: 0.85rem;
  color: #e5e5e5;
}

.topbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 15px;
}

.topbar-info, .topbar-contact {
  display: flex;
  align-items: center;
  gap: 20px;
}

.topbar-item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.topbar-item svg {
  width: 15px;
  height: 15px;
  color: var(--color-gold-light);
}

.topbar-item a:hover {
  color: var(--color-gold-light);
}

.topbar-badge {
  background: var(--gold-gradient);
  color: #FFFFFF;
  font-weight: 800;
  padding: 3px 10px;
  border-radius: 4px;
  font-size: 0.75rem;
  letter-spacing: 0.5px;
}

/* Main Navigation */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(166, 124, 53, 0.25);
  box-shadow: 0 4px 20px rgba(38, 38, 38, 0.05);
  transition: var(--transition);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px;
  max-width: 1400px;
  margin: 0 auto;
}

.brand-logo {
  display: flex;
  align-items: center;
}

.brand-logo img {
  height: 52px;
  width: auto;
  object-fit: contain;
}

.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 24px;
}

.nav-link {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--color-charcoal);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  position: relative;
  padding: 6px 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--gold-gradient);
  transition: var(--transition);
}

.nav-link:hover, .nav-link.active {
  color: var(--color-gold-primary);
}

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

/* DROPDOWN MENU LUXURY STYLING */
.has-dropdown {
  position: relative;
}

.has-dropdown > .nav-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.has-dropdown > .nav-link .dropdown-arrow {
  width: 14px;
  height: 14px;
  transition: transform 0.25s ease;
}

.has-dropdown:hover > .nav-link .dropdown-arrow {
  transform: rotate(180deg);
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 270px;
  background: #181b22;
  border: 1px solid var(--color-gold-primary);
  border-radius: 8px;
  padding: 8px 0;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.45);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: all 0.25s cubic-bezier(0.165, 0.84, 0.44, 1);
  z-index: 1000;
  list-style: none;
}

.has-dropdown:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-item a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 18px;
  color: #e2e8f0;
  font-size: 0.88rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s ease;
  border-left: 3px solid transparent;
}

.dropdown-item a:hover {
  background: rgba(212, 175, 55, 0.14);
  color: #FFE57F;
  border-left-color: var(--color-gold-primary);
  padding-left: 22px;
}

.dropdown-item .item-badge {
  margin-left: auto;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 4px;
  background: rgba(212, 175, 55, 0.2);
  color: #FFE57F;
}

@media (max-width: 991px) {
  .dropdown-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(212, 175, 55, 0.25);
    margin: 6px 0 10px 12px;
    box-shadow: none;
    border-radius: 6px;
  }
  .dropdown-item a {
    padding: 9px 14px;
    font-size: 0.88rem;
  }
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.btn-search-toggle {
  background: none;
  border: none;
  color: var(--color-charcoal);
  cursor: pointer;
  padding: 8px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.btn-search-toggle:hover {
  color: var(--color-gold-primary);
  background: rgba(166, 124, 53, 0.08);
}

.btn-quote-cart {
  position: relative;
  background: rgba(166, 124, 53, 0.08);
  border: 1px solid var(--color-gold-primary);
  color: var(--color-charcoal);
  padding: 8px 14px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
}

.btn-quote-cart:hover {
  background: var(--color-gold-primary);
  color: #FFFFFF;
  box-shadow: var(--shadow-gold);
}

.quote-count {
  background: #e53e3e;
  color: #fff;
  font-size: 0.75rem;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
}

.btn-hotline-header {
  background: var(--gold-gradient);
  color: #FFFFFF;
  font-weight: 800;
  padding: 10px 22px;
  border-radius: var(--radius-full);
  font-size: 0.95rem;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  box-shadow: var(--shadow-gold);
  transition: var(--transition);
}

.btn-hotline-header:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
  color: #FFFFFF;
}

.mobile-toggle {
  display: none;
  background: rgba(166, 124, 53, 0.08);
  border: 1px solid var(--border-gold);
  color: var(--color-charcoal);
  cursor: pointer;
  padding: 8px;
  border-radius: var(--radius-sm);
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.mobile-toggle:hover, .mobile-toggle.active {
  background: rgba(166, 124, 53, 0.18);
  color: var(--color-gold-primary);
  border-color: var(--color-gold-primary);
}

/* ==========================================================================
   HERO SECTION - ROYAL LUXURY ARCHITECTURE
   ========================================================================== */
.hero-section {
  position: relative;
  min-height: 88vh;
  display: flex;
  align-items: center;
  background: linear-gradient(180deg, #FBF9F5 0%, #FFFFFF 65%, #FAF7F2 100%);
  padding: 65px 0 50px;
  overflow: hidden;
  border-bottom: 1px solid var(--border-gold-subtle);
}

/* Background Wrought Iron Artwork Watermark */
.hero-bg-art {
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/hero-bg.svg');
  background-position: center top;
  background-size: cover;
  background-repeat: no-repeat;
  opacity: 0.05;
  pointer-events: none;
  z-index: 1;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: 
    radial-gradient(circle at 75% 35%, rgba(197, 162, 97, 0.14) 0%, transparent 60%),
    radial-gradient(circle at 15% 70%, rgba(166, 124, 53, 0.08) 0%, transparent 50%);
  pointer-events: none;
  z-index: 1;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 45px;
  align-items: center;
  position: relative;
  z-index: 2;
}

/* Hero Badge */
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(166, 124, 53, 0.08);
  border: 1px solid var(--color-gold-primary);
  padding: 8px 18px;
  border-radius: var(--radius-full);
  margin-bottom: 20px;
  box-shadow: 0 2px 10px rgba(166, 124, 53, 0.08);
}

.hero-badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #16a34a;
  box-shadow: 0 0 0 3px rgba(22, 163, 74, 0.25);
  display: inline-block;
  animation: pulseGreen 2s infinite;
}

@keyframes pulseGreen {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(22, 163, 74, 0.5); }
  70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(22, 163, 74, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(22, 163, 74, 0); }
}

.hero-badge-text {
  color: var(--color-gold-primary);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 1.2px;
  text-transform: uppercase;
}

/* Hero Typography */
.hero-title {
  font-size: clamp(2rem, 3.2vw, 2.85rem);
  line-height: 1.24;
  font-weight: 900;
  color: #1A1A1A;
  margin-bottom: 18px;
  letter-spacing: -0.5px;
  text-wrap: balance;
  word-break: keep-all;
}

.gold-gradient-text {
  background: linear-gradient(135deg, #B48435 0%, #D4AF37 45%, #8C6226 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
  font-weight: 900;
}

.hero-desc {
  font-size: 1.12rem;
  color: #4A5568;
  margin-bottom: 26px;
  max-width: 620px;
  line-height: 1.7;
}

.hero-desc strong {
  color: #1A1A1A;
}

/* Royal Value & Trust Bar */
.royal-value-bar {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  border: 1.5px solid rgba(166, 124, 53, 0.35);
  border-radius: 8px;
  padding: 16px 20px;
  margin-bottom: 28px;
  box-shadow: 0 10px 28px rgba(166, 124, 53, 0.1), 0 2px 6px rgba(0, 0, 0, 0.03);
}

.royal-value-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px dashed rgba(166, 124, 53, 0.25);
  margin-bottom: 12px;
}

.royal-price-tag {
  display: flex;
  align-items: baseline;
  gap: 8px;
  flex-wrap: wrap;
}

.price-prefix {
  font-size: 0.88rem;
  color: #555555;
  font-weight: 500;
}

.price-val {
  font-size: 1.18rem;
  font-weight: 900;
  color: #A67C35;
  letter-spacing: -0.2px;
}

.price-note {
  font-size: 0.82rem;
  color: #718096;
}

.royal-rating-pill {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  background: #FDFBF7;
  border: 1px solid rgba(166, 124, 53, 0.25);
  padding: 4px 10px;
  border-radius: var(--radius-full);
}

.rating-badge {
  background: #16a34a;
  color: #FFFFFF;
  font-size: 0.78rem;
  font-weight: 800;
  padding: 2px 6px;
  border-radius: 4px;
}

.rating-stars {
  color: #F59E0B;
  font-size: 1.05rem;
  letter-spacing: 1px;
}

.rating-text {
  font-size: 0.82rem;
  color: #4A5568;
  font-weight: 600;
}

/* Category Chips */
.royal-category-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.royal-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #F9F8F5;
  border: 1px solid rgba(166, 124, 53, 0.2);
  color: #2D3748;
  padding: 6px 13px;
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 600;
  transition: var(--transition);
}

.royal-chip svg {
  color: #A67C35;
}

.royal-chip:hover {
  background: #FFFFFF;
  border-color: #A67C35;
  color: #A67C35;
  transform: translateY(-2px);
  box-shadow: 0 4px 10px rgba(166, 124, 53, 0.15);
}

.royal-chip.highlight {
  background: rgba(166, 124, 53, 0.1);
  border-color: #A67C35;
  color: #8C6226;
  font-weight: 700;
}

/* CTA Buttons - Balanced & Synchronous Height */
.hero-cta-group {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 28px;
}

.btn-royal-primary,
.btn-royal-call {
  height: 52px;
  min-height: 52px;
  padding: 0 28px;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-size: 0.98rem;
  font-weight: 700;
  box-sizing: border-box;
  text-decoration: none;
  white-space: nowrap;
  transition: var(--transition);
  cursor: pointer;
}

.btn-royal-primary {
  position: relative;
  background: linear-gradient(135deg, #C5A261 0%, #A67C35 45%, #795822 100%);
  color: #FFFFFF !important;
  border: none;
  box-shadow: 0 10px 24px rgba(166, 124, 53, 0.35);
  overflow: hidden;
}

.btn-royal-primary::after {
  content: '';
  position: absolute;
  top: 0;
  left: -120%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  transition: 0.6s ease;
}

.btn-royal-primary:hover::after {
  left: 120%;
}

.btn-royal-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 30px rgba(166, 124, 53, 0.45);
  color: #FFFFFF !important;
}

.btn-royal-call {
  background: #FFFFFF;
  color: #262626;
  border: 1.5px solid #262626;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.05);
}

.btn-royal-call svg {
  color: #16a34a;
  flex-shrink: 0;
}

.btn-royal-call:hover {
  border-color: #A67C35;
  background: #FAF8F5;
  color: #A67C35;
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(166, 124, 53, 0.18);
}

/* Global Button Utilities */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  background: linear-gradient(135deg, #C5A261 0%, #A67C35 45%, #795822 100%);
  color: #FFFFFF !important;
  font-family: inherit;
  font-weight: 700;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  box-shadow: 0 8px 20px rgba(166, 124, 53, 0.35);
  transition: var(--transition);
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(166, 124, 53, 0.48);
  filter: brightness(1.06);
  color: #FFFFFF !important;
}

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

.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  background: transparent;
  color: var(--color-gold-primary) !important;
  border: 1.5px solid var(--color-gold-primary);
  font-family: inherit;
  font-weight: 600;
  border-radius: 8px;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}

.btn-zalo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  background: #0068FF;
  color: #FFFFFF !important;
  font-family: inherit;
  font-weight: 700;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  box-shadow: 0 8px 20px rgba(0, 104, 255, 0.28);
  transition: var(--transition);
  text-decoration: none;
}

.btn-zalo:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(0, 104, 255, 0.4);
  background: #0056d6;
  color: #FFFFFF !important;
}

.btn-outline:hover {
  background: rgba(166, 124, 53, 0.12);
  border-color: var(--color-gold-light);
  color: var(--color-gold-light) !important;
  transform: translateY(-2px);
}

/* ==========================================================================
   RIGHT COLUMN: HERO MASTERPIECE SHOWCASE
   ========================================================================== */
.hero-visual-wrapper {
  position: relative;
  z-index: 2;
}

.hero-masterpiece-card {
  position: relative;
  border-radius: 8px;
  overflow: hidden;
  border: 2px solid rgba(166, 124, 53, 0.45);
  box-shadow: 0 20px 45px rgba(166, 124, 53, 0.18), 0 4px 15px rgba(0, 0, 0, 0.06);
  background: #1A1A1A;
  transition: transform 0.4s ease, box-shadow 0.4s ease;
}

.hero-masterpiece-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 25px 55px rgba(166, 124, 53, 0.25), 0 8px 20px rgba(0, 0, 0, 0.08);
}

/* Floating Glass Badges */
.floating-badge {
  position: absolute;
  z-index: 10;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(22, 24, 29, 0.88);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(212, 175, 55, 0.5);
  padding: 8px 14px;
  border-radius: var(--radius-full);
  color: #FFFFFF;
  font-size: 0.8rem;
  font-weight: 700;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.35);
  animation: floatSubtle 4s ease-in-out infinite;
}

.badge-top-left {
  top: 18px;
  left: 18px;
}

.badge-top-right {
  top: 18px;
  right: 18px;
  animation-delay: 1.5s;
}

.badge-bottom-right {
  bottom: 110px;
  right: 18px;
  background: rgba(166, 124, 53, 0.9);
  border-color: #FFE57F;
  color: #FFFFFF;
  animation-delay: 2.5s;
}

@keyframes floatSubtle {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-5px); }
}

.hero-image-container {
  width: 100%;
  aspect-ratio: 4/3;
  overflow: hidden;
  background: #14161a;
  position: relative;
}

.hero-showcase-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: opacity 0.35s ease, transform 0.6s cubic-bezier(0.165, 0.84, 0.44, 1);
}

.hero-masterpiece-card:hover .hero-showcase-img {
  transform: scale(1.03);
}

.hero-card-meta {
  padding: 18px 22px;
  background: linear-gradient(180deg, #1A1D24 0%, #121418 100%);
  border-top: 1px solid rgba(166, 124, 53, 0.3);
  color: #FFFFFF;
}

.meta-headline {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 6px;
  flex-wrap: wrap;
}

.meta-tag {
  background: rgba(166, 124, 53, 0.25);
  border: 1px solid rgba(212, 175, 55, 0.6);
  color: #FFE57F;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 1px;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  text-transform: uppercase;
}

.hero-card-meta h4 {
  font-size: 1.15rem;
  color: #FFFFFF;
  margin: 0;
  font-weight: 800;
}

.hero-card-meta p {
  color: #D1D5DB;
  font-size: 0.88rem;
  line-height: 1.5;
  margin: 0;
}

/* Category Switcher Tabs */
.hero-switcher-tabs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin-top: 14px;
}

.hero-tab-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  background: #FFFFFF;
  border: 1.5px solid rgba(166, 124, 53, 0.25);
  padding: 9px 6px;
  border-radius: 8px;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.hero-tab-btn .tab-icon {
  font-size: 1.2rem;
  line-height: 1;
}

.hero-tab-btn .tab-label {
  font-size: 0.75rem;
  font-weight: 700;
  color: #4A5568;
  white-space: nowrap;
}

.hero-tab-btn:hover {
  border-color: #A67C35;
  background: #FAF8F5;
  transform: translateY(-2px);
}

.hero-tab-btn.active {
  background: linear-gradient(135deg, #C5A261 0%, #A67C35 100%);
  border-color: #A67C35;
  box-shadow: 0 4px 12px rgba(166, 124, 53, 0.3);
  transform: translateY(-2px);
}

.hero-tab-btn.active .tab-label {
  color: #FFFFFF;
  font-weight: 800;
}

/* ==========================================================================
   HERO STATS BAR (4 CHỈ SỐ VÀNG)
   ========================================================================== */
.hero-stats-bar {
  display: flex;
  align-items: center;
  justify-content: space-around;
  background: #FFFFFF;
  border: 1.5px solid rgba(166, 124, 53, 0.25);
  border-radius: 8px;
  padding: 22px 30px;
  margin-top: 45px;
  box-shadow: 0 10px 30px rgba(166, 124, 53, 0.08), 0 2px 8px rgba(0, 0, 0, 0.02);
  position: relative;
  z-index: 2;
}

.hero-stat-card {
  text-align: center;
  flex: 1;
}

.stat-number {
  font-size: 2.35rem;
  font-weight: 900;
  color: #A67C35;
  line-height: 1;
  margin-bottom: 6px;
  font-family: var(--font-sans);
}

.stat-unit {
  font-size: 1.4rem;
  font-weight: 800;
  color: #B48435;
  margin-left: 2px;
}

.stat-label {
  font-size: 0.88rem;
  font-weight: 700;
  color: #4B5563;
  text-transform: uppercase;
  letter-spacing: 0.6px;
}

.hero-stat-divider {
  width: 1px;
  height: 48px;
  background: linear-gradient(180deg, transparent, rgba(166, 124, 53, 0.35), transparent);
}

/* ==========================================================================
   CATEGORIES GRID SECTION
   ========================================================================== */
.categories-section {
  padding: 90px 0;
  background-color: var(--bg-dark);
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 25px;
}

.cat-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 30px 24px;
  text-align: center;
  position: relative;
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.cat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--gold-gradient);
  transform: scaleX(0);
  transition: var(--transition);
}

.cat-card:hover {
  transform: translateY(-8px);
  border-color: var(--border-gold);
  box-shadow: var(--shadow-gold);
  background: var(--bg-card);
}

.cat-card:hover::before {
  transform: scaleX(1);
}

.cat-icon {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: rgba(212, 175, 55, 0.1);
  border: 1px solid var(--border-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--primary-gold);
  transition: var(--transition);
}

.cat-card:hover .cat-icon {
  background: var(--primary-gold);
  color: #121316;
  transform: rotate(5deg) scale(1.08);
}

.cat-icon svg {
  width: 36px;
  height: 36px;
}

.cat-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 10px;
}

.cat-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 18px;
  flex-grow: 1;
}

.cat-link {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--primary-gold);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.cat-link:hover {
  gap: 10px;
  color: var(--primary-gold-light);
}

/* ==========================================================================
   PRODUCT CATALOG & FILTERS (FULL-WIDTH SECTION HOÀNG GIA)
   ========================================================================== */
.catalog-section {
  padding: 75px 0 85px;
  background: #FAF8F5;
  border-top: 1px solid rgba(166, 124, 53, 0.25);
  border-bottom: 1px solid rgba(166, 124, 53, 0.25);
  position: relative;
}

.catalog-controls {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 40px;
}

.filter-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  background: #FFFFFF;
  border: 1.5px solid rgba(166, 124, 53, 0.25);
  border-radius: 8px;
  padding: 16px 20px;
  box-shadow: 0 4px 16px rgba(166, 124, 53, 0.06);
}

.filter-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.filter-tab {
  background: #FDFBF7;
  border: 1px solid rgba(166, 124, 53, 0.25);
  color: #2D3748;
  padding: 8px 18px;
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
}

.filter-tab:hover, .filter-tab.active {
  background: linear-gradient(135deg, #C5A261 0%, #A67C35 100%);
  color: #FFFFFF;
  border-color: #A67C35;
  box-shadow: 0 4px 14px rgba(166, 124, 53, 0.3);
  transform: translateY(-2px);
}

.catalog-search-box {
  position: relative;
  min-width: 280px;
}

.catalog-search-input {
  width: 100%;
  background: #FDFBF7;
  border: 1.5px solid rgba(166, 124, 53, 0.3);
  color: #1A1A1A;
  padding: 10px 18px 10px 42px;
  border-radius: var(--radius-full);
  outline: none;
  font-size: 0.9rem;
  transition: var(--transition);
}

.catalog-search-input:focus {
  border-color: #A67C35;
  background: #FFFFFF;
  box-shadow: 0 0 14px rgba(166, 124, 53, 0.25);
}

.catalog-search-icon {
  position: absolute;
  left: 15px;
  top: 50%;
  transform: translateY(-50%);
  color: #A67C35;
  width: 18px;
  height: 18px;
}

/* Products Grid - Full Width Luxury 3-Column Layout */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 32px;
}

.product-card {
  position: relative;
  background: #FFFFFF;
  border: 1.5px solid rgba(166, 124, 53, 0.22);
  border-radius: 8px;
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.05);
}

.product-card:hover {
  transform: translateY(-6px);
  border-color: #A67C35;
  box-shadow: 0 16px 36px rgba(166, 124, 53, 0.18), 0 2px 6px rgba(0, 0, 0, 0.04);
}

.product-thumb {
  position: relative;
  aspect-ratio: 4/3;
  overflow: hidden;
  background: #1A1D24;
}

.product-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.product-tag {
  position: absolute;
  top: 14px;
  left: 14px;
  background: linear-gradient(135deg, #C5A261, #A67C35);
  color: #FFFFFF;
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  padding: 5px 12px;
  border-radius: var(--radius-full);
  letter-spacing: 0.5px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
}

.product-code {
  position: absolute;
  top: 14px;
  right: 14px;
  background: rgba(18, 20, 24, 0.88);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(212, 175, 55, 0.6);
  color: #FFE57F;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--radius-full);
}

.product-overlay-actions {
  position: absolute;
  inset: 0;
  background: rgba(18, 20, 24, 0.65);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  opacity: 0;
  transition: var(--transition);
}

.product-card:hover .product-overlay-actions {
  opacity: 1;
}

.btn-action-view {
  background: linear-gradient(135deg, #C5A261, #A67C35);
  color: #FFFFFF;
  border: none;
  font-weight: 800;
  font-size: 0.88rem;
  padding: 12px 22px;
  border-radius: var(--radius-full);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.35);
  transition: var(--transition);
}

.btn-action-view:hover {
  transform: scale(1.05);
  box-shadow: 0 8px 24px rgba(166, 124, 53, 0.5);
}

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

.product-cat-name {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  color: #A67C35;
  font-weight: 800;
  margin-bottom: 6px;
}

.product-name {
  font-size: 1.25rem;
  font-weight: 800;
  color: #1A1A1A;
  margin-bottom: 8px;
  line-height: 1.35;
}

.product-desc {
  font-size: 0.9rem;
  color: #4A5568;
  margin-bottom: 16px;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.product-specs-snippet {
  list-style: none;
  font-size: 0.84rem;
  color: #374151;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(166, 124, 53, 0.18);
}

.product-specs-snippet li {
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.product-specs-snippet li::before {
  content: '✓';
  color: #16a34a;
  font-weight: 900;
  font-size: 0.9rem;
}

.product-footer {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.product-price {
  font-size: 1.15rem;
  font-weight: 900;
  color: #A67C35;
  letter-spacing: -0.2px;
}

.btn-add-quote {
  background: rgba(166, 124, 53, 0.1);
  border: 1.5px solid #A67C35;
  color: #8C6226;
  font-size: 0.85rem;
  font-weight: 800;
  padding: 9px 18px;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.btn-add-quote:hover {
  background: #A67C35;
  color: #FFFFFF;
  transform: translateY(-2px);
  box-shadow: 0 4px 14px rgba(166, 124, 53, 0.25);
}

.btn-add-quote.selected {
  background: #16a34a;
  border-color: #16a34a;
  color: #FFFFFF;
}

/* ==========================================================================
   ONLINE COST ESTIMATOR SECTION (DỰ TOÁN CHI PHÍ TRỰC TUYẾN)
   ========================================================================== */
.estimator-section {
  padding: 90px 0;
  background: radial-gradient(circle at center, #1b2029 0%, #0e1014 100%);
  border-top: 1px solid var(--border-gold);
  border-bottom: 1px solid var(--border-gold);
}

.estimator-card {
  background: var(--bg-surface);
  border: 2px solid var(--border-gold);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-card), var(--shadow-gold);
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
}

.estimator-form h3 {
  font-size: 1.5rem;
  color: #fff;
  margin-bottom: 25px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.estimator-group {
  margin-bottom: 22px;
}

.estimator-label {
  display: block;
  font-size: 0.9rem;
  font-weight: 700;
  color: #e2e8f0;
  margin-bottom: 8px;
}

.estimator-select, .estimator-input {
  width: 100%;
  background: var(--bg-dark);
  border: 1px solid var(--border-subtle);
  color: #fff;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  outline: none;
  transition: var(--transition);
}

.estimator-select:focus, .estimator-input:focus {
  border-color: var(--primary-gold);
  box-shadow: 0 0 10px rgba(212, 175, 55, 0.3);
}

.estimator-slider-wrapper {
  display: flex;
  align-items: center;
  gap: 15px;
}

.estimator-slider {
  flex-grow: 1;
  accent-color: var(--primary-gold);
  cursor: pointer;
}

.estimator-slider-val {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--primary-gold-light);
  min-width: 70px;
  text-align: right;
}

.estimator-result-box {
  background: var(--bg-dark);
  border: 1px solid var(--border-gold);
  border-radius: var(--radius-md);
  padding: 30px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  text-align: center;
}

.result-title {
  font-size: 1.1rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 8px;
}

.result-price {
  font-size: 2.5rem;
  font-weight: 900;
  color: #FFE57F;
  margin-bottom: 12px;
  text-shadow: 0 0 20px rgba(212, 175, 55, 0.4);
}

.result-note {
  font-size: 0.85rem;
  color: #94a3b8;
  line-height: 1.5;
  margin-bottom: 25px;
}

.result-specs-summary {
  text-align: left;
  background: rgba(255, 255, 255, 0.03);
  padding: 15px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  margin-bottom: 25px;
}

.result-specs-summary div {
  margin-bottom: 6px;
  display: flex;
  justify-content: space-between;
}

.btn-send-estimate {
  width: 100%;
  background: var(--gold-gradient);
  color: #121316;
  font-weight: 800;
  font-size: 1rem;
  padding: 14px 20px;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  box-shadow: var(--shadow-gold);
  transition: var(--transition);
}

.btn-send-estimate:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

/* ==========================================================================
   WHY CHOOSE US / WORKFLOW PROCESS (6 BƯỚC THI CÔNG)
   ========================================================================== */
.process-section {
  padding: 90px 0;
  background: var(--bg-dark);
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 20px;
}

.process-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 25px 18px;
  text-align: center;
  position: relative;
  transition: var(--transition);
}

.process-card:hover {
  border-color: var(--border-gold);
  transform: translateY(-5px);
}

.process-step {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--gold-gradient);
  color: #121316;
  font-weight: 900;
  font-size: 1.1rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 15px;
}

.process-card h4 {
  font-size: 1.05rem;
  color: #fff;
  margin-bottom: 8px;
}

.process-card p {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.4;
}

/* ==========================================================================
   AEO & AIO KNOWLEDGE HUB / FAQ ACCORDION
   Tối ưu hóa câu trả lời trực diện cho Google SGE & AI Search Engines
   ========================================================================== */
.faq-section {
  padding: 90px 0;
  background: var(--color-ivory);
  border-top: 1px solid var(--border-gold-subtle);
}

.faq-list {
  max-width: 920px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: #FFFFFF;
  border: 1px solid var(--border-gold-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
  box-shadow: 0 4px 15px rgba(38, 38, 38, 0.04);
}

.faq-item.active {
  border-color: var(--color-gold-primary);
  box-shadow: 0 6px 24px rgba(166, 124, 53, 0.15);
}

.faq-question {
  padding: 20px 24px;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-charcoal);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 15px;
  user-select: none;
}

.faq-item:hover .faq-question {
  color: var(--color-gold-primary);
}

.faq-icon {
  width: 24px;
  height: 24px;
  color: var(--color-gold-primary);
  transition: transform 0.3s ease;
  flex-shrink: 0;
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
  padding: 0 24px;
  color: #4a4a4a;
  font-size: 0.95rem;
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 600px;
  padding: 0 24px 24px;
}

/* AI Direct Answer Callout Box for AEO */
.ai-summary-badge {
  display: inline-block;
  background: rgba(212, 175, 55, 0.15);
  color: var(--text-gold);
  font-size: 0.78rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ==========================================================================
   CONTACT & QUOTE REQUEST SECTION (INTEGRATED SMTP)
   ========================================================================== */
.contact-section {
  padding: 90px 0;
  background: var(--bg-dark);
  border-top: 1px solid var(--border-gold);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 50px;
  align-items: start;
}

.contact-info-panel {
  background: var(--bg-surface);
  border: 1px solid var(--border-gold);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-card);
}

.contact-info-panel h3 {
  font-size: 1.7rem;
  color: #fff;
  margin-bottom: 12px;
}

.contact-info-panel p {
  color: var(--text-muted);
  margin-bottom: 30px;
  font-size: 0.95rem;
}

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

.contact-item-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(212, 175, 55, 0.1);
  border: 1px solid var(--border-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-gold);
  flex-shrink: 0;
}

.contact-item-text h5 {
  font-size: 0.9rem;
  color: var(--primary-gold);
  text-transform: uppercase;
  margin-bottom: 4px;
}

.contact-item-text p, .contact-item-text a {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-charcoal);
}

.contact-form-panel {
  background: #FFFFFF;
  border: 2px solid var(--color-gold-primary);
  border-radius: var(--radius-lg);
  padding: 42px 40px;
  box-shadow: 0 10px 35px rgba(38, 38, 38, 0.08), var(--shadow-gold);
}

.contact-form-panel h3 {
  color: var(--color-charcoal);
  font-size: 1.75rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.contact-form-panel p.form-subtitle {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 28px;
  line-height: 1.6;
}

.form-pill-selector {
  margin-bottom: 24px;
}

.form-pill-label {
  display: block;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-charcoal);
  margin-bottom: 10px;
}

.form-pills-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.form-pill-btn {
  background: var(--color-ivory);
  border: 1.5px solid rgba(166, 124, 53, 0.3);
  color: var(--color-charcoal);
  font-size: 0.88rem;
  font-weight: 600;
  padding: 8px 16px;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  user-select: none;
}

.form-pill-btn:hover {
  border-color: var(--color-gold-primary);
  background: #FAF8F5;
  transform: translateY(-1px);
}

.form-pill-btn.active {
  background: var(--gold-gradient);
  border-color: var(--color-gold-primary);
  color: #FFFFFF;
  font-weight: 700;
  box-shadow: 0 4px 14px rgba(166, 124, 53, 0.25);
}

.form-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 20px;
}

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

.form-label {
  display: block;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-charcoal);
  margin-bottom: 8px;
}

.form-control {
  width: 100%;
  background: #FFFFFF;
  border: 1.5px solid #D1D5DB;
  color: var(--color-charcoal);
  padding: 13px 16px;
  border-radius: 8px;
  outline: none;
  font-size: 0.95rem;
  font-family: inherit;
  transition: var(--transition);
}

.form-control::placeholder {
  color: #9CA3AF;
}

.form-control:focus {
  border-color: var(--color-gold-primary);
  box-shadow: 0 0 0 4px rgba(166, 124, 53, 0.15);
  background: #FFFFFF;
}

textarea.form-control {
  resize: vertical;
  min-height: 100px;
}

.form-trust-banner {
  background: var(--color-ivory);
  border: 1px solid var(--border-gold-subtle);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-around;
  gap: 12px;
  margin-bottom: 24px;
}

.form-trust-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--color-charcoal);
}

.form-trust-item svg {
  color: #16a34a;
  flex-shrink: 0;
}

.btn-submit-form {
  width: 100%;
  background: var(--gold-gradient);
  color: #FFFFFF;
  font-weight: 800;
  font-size: 1.05rem;
  padding: 16px 24px;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  box-shadow: var(--shadow-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: var(--transition);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.btn-submit-form:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
  color: #FFFFFF;
}

.btn-submit-form:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* ==========================================================================
   FOOTER SECTION (ROYAL CHARCOAL & GOLD THEME)
   ========================================================================== */
.footer {
  background: #1e1e1e;
  border-top: 3px solid var(--color-gold-primary);
  padding: 70px 0 25px;
  color: #d1d5db;
  font-size: 0.9rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 50px;
}

.footer-brand a {
  display: inline-block;
  text-decoration: none;
}

.footer-brand img {
  height: 60px;
  width: auto;
  margin-bottom: 18px;
  display: block;
}

.footer-brand p {
  line-height: 1.65;
  margin-bottom: 18px;
  color: #a3aab5;
}

.footer-tagline {
  color: var(--color-gold-light);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.5px;
}

.footer-col {
  min-width: 0;
}

.footer-title {
  font-size: 1.08rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 8px;
  letter-spacing: 0.5px;
}

.footer-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 36px;
  height: 2px;
  background: var(--gold-gradient);
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-links li {
  margin-bottom: 11px;
}

.footer-links a {
  color: #a3aab5;
  transition: var(--transition);
  text-decoration: none;
  font-size: 0.9rem;
  display: inline-block;
}

.footer-links a:hover {
  color: var(--color-gold-light);
  transform: translateX(4px);
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 15px;
}

.footer-contact-item svg {
  color: var(--color-gold-light);
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  margin-top: 3px;
}

.footer-contact-label {
  font-size: 0.78rem;
  color: #8f96a3;
  margin-bottom: 2px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.footer-hotline {
  font-size: 1.35rem;
  font-weight: 900;
  color: var(--color-gold-light);
  text-decoration: none;
  display: inline-block;
  transition: var(--transition);
}

.footer-hotline:hover {
  color: #ffe57f;
  transform: translateX(3px);
}

.footer-email {
  color: #e5e7eb;
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition);
}

.footer-email:hover {
  color: var(--color-gold-light);
}

.footer-address {
  font-size: 0.88rem;
  color: #a3aab5;
  line-height: 1.55;
}

.footer-bottom {
  border-top: 1px solid rgba(166, 124, 53, 0.25);
  padding-top: 25px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 15px;
  font-size: 0.85rem;
  color: #8f96a3;
}

.footer-bottom a {
  color: var(--color-gold-light);
  text-decoration: none;
  font-weight: 700;
}

/* ==========================================================================
   FLOATING ACTION BUTTONS (HOTLINE & SPEED DIAL)
   ========================================================================== */
.floating-widget {
  position: fixed;
  bottom: 25px;
  right: 25px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  z-index: 999;
}

.floating-btn,
.float-btn {
  width: 54px;
  height: 54px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.4);
  transition: var(--transition);
  position: relative;
  text-decoration: none;
}

.floating-btn svg,
.float-btn svg {
  width: 24px;
  height: 24px;
  fill: currentColor;
  flex-shrink: 0;
}

.floating-btn img,
.float-btn img {
  width: 32px;
  height: 32px;
  object-fit: contain;
  border-radius: 6px;
}

.floating-btn:hover,
.float-btn:hover {
  transform: scale(1.12);
}

.floating-btn-phone,
.float-phone {
  background: #25d366;
  animation: phonePulse 1.8s infinite;
}

.floating-btn-zalo,
.float-zalo {
  background: #0068FF;
}

.float-tooltip {
  display: none;
  position: absolute;
  right: 64px;
  background: rgba(18, 19, 22, 0.95);
  color: #fff;
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 700;
  white-space: nowrap;
  pointer-events: none;
  box-shadow: 0 4px 12px rgba(0,0,0,0.4);
  border: 1px solid rgba(212, 175, 55, 0.4);
}

.float-btn:hover .float-tooltip,
.floating-btn:hover .float-tooltip {
  display: block;
}

.floating-btn-top {
  background: var(--bg-card);
  border: 1px solid var(--border-gold);
  color: var(--primary-gold);
  opacity: 0;
  visibility: hidden;
}

.floating-btn-top.visible {
  opacity: 1;
  visibility: visible;
}

@keyframes phonePulse {
  0% { box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.7); }
  70% { box-shadow: 0 0 0 16px rgba(37, 211, 102, 0); }
  100% { box-shadow: 0 0 0 0 rgba(37, 211, 102, 0); }
}

/* ==========================================================================
   QUOTATION DRAWER & QUICK VIEW MODAL
   ========================================================================== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(8, 12, 18, 0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 9999;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal-card,
.modal-container {
  background: linear-gradient(150deg, #182230 0%, #0e1520 100%);
  border: 1.5px solid rgba(197, 162, 97, 0.5);
  border-radius: 16px;
  max-width: 680px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  box-shadow: 0 25px 60px -10px rgba(0, 0, 0, 0.85), 0 0 35px rgba(166, 124, 53, 0.25);
  transform: scale(0.94) translateY(12px);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  color: #ffffff;
  display: flex;
  flex-direction: column;
}

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

.modal-card::-webkit-scrollbar,
.modal-container::-webkit-scrollbar {
  width: 6px;
}
.modal-card::-webkit-scrollbar-track,
.modal-container::-webkit-scrollbar-track {
  background: rgba(0, 0, 0, 0.25);
}
.modal-card::-webkit-scrollbar-thumb,
.modal-container::-webkit-scrollbar-thumb {
  background: rgba(197, 162, 97, 0.35);
  border-radius: 4px;
}
.modal-card::-webkit-scrollbar-thumb:hover,
.modal-container::-webkit-scrollbar-thumb:hover {
  background: var(--color-gold-primary);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  border-bottom: 1px solid rgba(197, 162, 97, 0.25);
  background: rgba(14, 21, 32, 0.96);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-top-left-radius: 15px;
  border-top-right-radius: 15px;
}

.modal-header h3 {
  color: #ffffff !important;
  font-size: 1.15rem;
  font-weight: 700;
  margin: 0;
  letter-spacing: 0.3px;
}

.modal-header p {
  color: #94a3b8 !important;
  margin: 3px 0 0 0;
  font-size: 0.85rem;
}

.modal-close {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(197, 162, 97, 0.35);
  color: #ffffff;
  width: 38px;
  height: 38px;
  min-width: 38px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  line-height: 1;
  transition: var(--transition);
  flex-shrink: 0;
}

.modal-close:hover {
  background: var(--color-gold-primary);
  border-color: var(--color-gold-light);
  color: #ffffff;
  transform: rotate(90deg);
  box-shadow: 0 0 12px rgba(197, 162, 97, 0.5);
}

.modal-card > .modal-close,
.modal-container > .modal-close {
  position: absolute;
  top: 18px;
  right: 18px;
  z-index: 20;
}

.modal-body {
  padding: 24px;
}

/* Modal Form Styles */
.modal-card .form-label,
.modal-container .form-label {
  color: #e2e8f0 !important;
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 6px;
  display: block;
}

.modal-card .form-control,
.modal-container .form-control {
  width: 100%;
  background: #0b1119 !important;
  border: 1.5px solid rgba(255, 255, 255, 0.14) !important;
  color: #ffffff !important;
  border-radius: 8px;
  padding: 12px 14px;
  font-size: 0.95rem;
  font-family: inherit;
  outline: none;
  transition: var(--transition);
  box-sizing: border-box;
}

.modal-card .form-control::placeholder,
.modal-container .form-control::placeholder {
  color: #64748b !important;
}

.modal-card .form-control:focus,
.modal-container .form-control:focus {
  background: #0f1824 !important;
  border-color: var(--color-gold-primary) !important;
  box-shadow: 0 0 0 3px rgba(166, 124, 53, 0.3) !important;
  color: #ffffff !important;
}

.modal-card textarea.form-control,
.modal-container textarea.form-control {
  resize: vertical;
  min-height: 80px;
}

#quote-modal-items {
  margin-bottom: 15px;
}

@media (max-width: 640px) {
  .modal-overlay {
    padding: 12px;
  }
  .modal-card,
  .modal-container {
    max-height: 94vh;
    border-radius: 12px;
  }
  .modal-header {
    padding: 16px 18px;
  }
  .modal-body {
    padding: 18px 16px 20px;
  }
  .modal-card .form-grid,
  .modal-container .form-grid {
    grid-template-columns: 1fr !important;
    gap: 12px !important;
  }
  #quick-view-content > div {
    grid-template-columns: 1fr !important;
    padding: 22px 16px !important;
    gap: 20px !important;
  }
}

/* Toast Notifications */
.toast-notification {
  position: fixed;
  top: 25px;
  right: 25px;
  background: linear-gradient(145deg, #1e2837 0%, #0f1722 100%);
  border: 1.5px solid rgba(197, 162, 97, 0.6);
  border-radius: 12px;
  padding: 14px 20px;
  box-shadow: 0 12px 35px rgba(0, 0, 0, 0.5), 0 0 20px rgba(166, 124, 53, 0.25);
  display: flex;
  align-items: center;
  gap: 12px;
  color: #ffffff !important;
  z-index: 99999;
  transform: translateX(130%);
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s ease;
  max-width: 420px;
}

.toast-notification.active {
  transform: translateX(0);
}

.toast-icon {
  width: 28px;
  height: 28px;
  min-width: 28px;
  border-radius: 50%;
  background: linear-gradient(135deg, #C5A261 0%, #A67C35 100%);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
  box-shadow: 0 2px 8px rgba(166, 124, 53, 0.4);
}

.toast-message {
  color: #ffffff !important;
  font-size: 0.93rem;
  font-weight: 500;
  line-height: 1.45;
}

@media (max-width: 640px) {
  .toast-notification {
    top: 15px;
    right: 15px;
    left: 15px;
    max-width: none;
    transform: translateY(-130%);
  }
  .toast-notification.active {
    transform: translateY(0);
  }
}

/* ==========================================================================
   RESPONSIVE BREAKPOINTS
   ========================================================================== */
@media (max-width: 1024px) {
  /* Navigation Drawer for Tablet & Mobile */
  .mobile-toggle {
    display: flex;
  }
  .nav-menu {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(10, 13, 20, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: stretch;
    padding: 24px 20px 100px;
    gap: 10px;
    overflow-y: auto;
    transform: translateY(-110%);
    opacity: 0;
    visibility: hidden;
    transition: all 0.35s cubic-bezier(0.165, 0.84, 0.44, 1);
    border-bottom: 2px solid var(--border-gold);
    z-index: 999;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.8);
  }
  .nav-menu.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  .nav-menu li {
    width: 100%;
  }
  .nav-menu .nav-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    font-size: 1rem;
    font-weight: 700;
    color: #f1f5f9;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    transition: var(--transition);
  }
  .nav-menu .nav-link:hover,
  .nav-menu .nav-link.active {
    background: rgba(212, 175, 55, 0.15);
    border-color: var(--border-gold);
    color: #FFE57F;
    padding-left: 20px;
  }

  /* Two-column layout collapses to single column */
  .page-layout {
    grid-template-columns: 1fr;
    gap: 36px;
    padding: 24px 0 60px;
  }
  .sidebar-vertical-banner {
    position: static;
    max-width: 580px;
    margin: 0 auto;
    width: 100%;
  }

  .calc-layout-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .hero-desc {
    margin: 0 auto 35px;
  }
  .hero-cta-group {
    justify-content: center;
  }
  .hero-stats {
    justify-content: center;
  }
  .estimator-card {
    grid-template-columns: 1fr;
  }
  .contact-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

/* Body lock when mobile menu is open */
body.menu-locked {
  overflow: hidden;
}

/* ==========================================================================
   TWO-COLUMN PAGE LAYOUT & STICKY SIDEBAR (BOCGHESOFA.INFO ARCHITECTURE)
   ========================================================================== */
.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 2.5fr) minmax(0, 1fr);
  gap: 40px;
  align-items: start;
  padding: 40px 0 80px;
}

.main-column {
  min-width: 0;
}

.sidebar-vertical-banner {
  position: sticky;
  top: 90px;
  background: #FFFFFF;
  border: 2px solid var(--color-gold-primary);
  border-radius: var(--radius-md);
  padding: 26px;
  box-shadow: 0 10px 30px rgba(38, 38, 38, 0.08), var(--shadow-gold);
  color: var(--color-charcoal);
  z-index: 90;
}

.sidebar-header {
  text-align: center;
  margin-bottom: 22px;
  padding-bottom: 18px;
  border-bottom: 1px solid rgba(166, 124, 53, 0.2);
}

.sidebar-header .badge-hot {
  background: var(--gold-gradient);
  color: #FFFFFF;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  display: inline-block;
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.sidebar-header h3 {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-charcoal);
  margin-bottom: 6px;
}

.sidebar-header p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.sidebar-form .form-group {
  margin-bottom: 15px;
}

.sidebar-form .form-control {
  background: #FFFFFF;
  border: 1px solid rgba(38, 38, 38, 0.2);
  padding: 11px 14px;
  font-size: 0.9rem;
  color: var(--color-charcoal);
  border-radius: 6px;
  width: 100%;
}

.sidebar-form .form-control:focus {
  border-color: var(--color-gold-primary);
  outline: none;
}

.sidebar-btn-submit {
  width: 100%;
  background: var(--gold-gradient);
  color: #FFFFFF;
  font-weight: 800;
  padding: 14px;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  font-size: 1rem;
  transition: var(--transition);
  box-shadow: var(--shadow-gold);
  margin-top: 5px;
}

.sidebar-btn-submit:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
  color: #FFFFFF;
}

.sidebar-hotline-box {
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid rgba(38, 38, 38, 0.12);
  text-align: center;
}

.sidebar-hotline-box span {
  display: block;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.sidebar-hotline-link {
  font-size: 1.4rem;
  font-weight: 900;
  color: #16a34a;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.sidebar-zalo-box {
  margin-top: 12px;
}

.sidebar-zalo-link {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: #0068ff;
  color: #ffffff;
  font-weight: 700;
  padding: 12px;
  border-radius: 8px;
  text-decoration: none;
  font-size: 0.92rem;
  transition: var(--transition);
  box-shadow: 0 4px 12px rgba(0, 104, 255, 0.2);
}

.sidebar-zalo-link:hover {
  background: #0056d6;
  transform: translateY(-2px);
  color: #ffffff;
  box-shadow: 0 6px 16px rgba(0, 104, 255, 0.35);
}

.sidebar-trust-list,
.sidebar-perks {
  list-style: none !important;
  list-style-type: none !important;
  padding-left: 0 !important;
  margin-left: 0 !important;
  margin-top: 20px;
  font-size: 0.88rem;
  color: var(--color-charcoal);
  font-weight: 600;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.sidebar-trust-list li,
.sidebar-perks li {
  display: flex !important;
  align-items: center !important;
  gap: 10px !important;
  list-style: none !important;
  list-style-type: none !important;
  color: var(--color-charcoal) !important;
}

.sidebar-trust-list li span,
.sidebar-perks li span {
  color: var(--color-charcoal);
  font-weight: 600;
}

.sidebar-trust-list li svg,
.sidebar-perks li svg {
  color: #16a34a;
  flex-shrink: 0;
}

/* ==========================================================================
   INTERACTIVE 4-STEP IRON COST CALCULATOR (PHONG CÁCH BOCGHESOFA.INFO)
   ========================================================================== */
.iron-calc-section {
  background: var(--color-ivory);
  border: 2px solid var(--color-gold-primary);
  border-radius: var(--radius-lg);
  padding: 35px 30px;
  margin-bottom: 45px;
  box-shadow: var(--shadow-card);
}

.calc-header {
  text-align: center;
  margin-bottom: 30px;
}

.calc-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(166, 124, 53, 0.12);
  border: 1px solid var(--color-gold-primary);
  color: var(--color-gold-primary);
  font-size: 0.82rem;
  font-weight: 800;
  padding: 5px 16px;
  border-radius: var(--radius-full);
  margin-bottom: 12px;
  text-transform: uppercase;
}

.calc-title {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--color-charcoal);
  margin-bottom: 10px;
}

.calc-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
  max-width: 680px;
  margin: 0 auto;
}

.calc-layout-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 35px;
  align-items: start;
}

.calc-step {
  margin-bottom: 24px;
}

.calc-step-label {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--color-charcoal);
  margin-bottom: 12px;
}

.calc-step-num {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--gold-gradient);
  color: #FFFFFF;
  font-size: 0.8rem;
  font-weight: 900;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* Step 1: Type Grid */
.calc-type-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.calc-type-btn {
  background: #FFFFFF;
  border: 1px solid rgba(38, 38, 38, 0.15);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  text-align: left;
  cursor: pointer;
  transition: var(--transition);
  color: var(--color-charcoal);
}

.calc-type-btn:hover {
  border-color: var(--color-gold-primary);
  background: #FAF8F5;
}

.calc-type-btn.active {
  border-color: var(--color-gold-primary);
  background: rgba(166, 124, 53, 0.1);
  box-shadow: 0 0 14px rgba(166, 124, 53, 0.2);
}

.calc-type-name {
  display: block;
  font-weight: 700;
  font-size: 0.92rem;
  margin-bottom: 3px;
  color: var(--color-charcoal);
}

.calc-type-sub {
  display: block;
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* Step 2: Slider */
.calc-slider-wrapper {
  background: #FFFFFF;
  border: 1px solid rgba(38, 38, 38, 0.15);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
}

.calc-slider-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.calc-slider-label {
  font-size: 0.9rem;
  color: var(--color-charcoal);
  font-weight: 600;
}

.calc-slider-val {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--color-gold-primary);
}

.calc-range-input {
  width: 100%;
  accent-color: var(--color-gold-primary);
  cursor: pointer;
}

/* Step 3: Material Grid */
.calc-material-grid {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.calc-material-btn {
  background: #FFFFFF;
  border: 1px solid rgba(38, 38, 38, 0.15);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  transition: var(--transition);
  text-align: left;
  color: var(--color-charcoal);
}

.calc-material-btn:hover {
  border-color: var(--color-gold-primary);
  background: #FAF8F5;
}

.calc-material-btn.active {
  border-color: var(--color-gold-primary);
  background: rgba(166, 124, 53, 0.1);
  box-shadow: 0 0 14px rgba(166, 124, 53, 0.2);
}

.calc-mat-name {
  display: block;
  font-size: 0.92rem;
  font-weight: 700;
  margin-bottom: 2px;
  color: var(--color-charcoal);
}

.calc-mat-desc {
  display: block;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.calc-mat-tag {
  font-size: 0.72rem;
  font-weight: 800;
  padding: 3px 8px;
  border-radius: 4px;
  white-space: nowrap;
}

.calc-mat-tag.economy {
  background: #EAE6DF;
  color: var(--color-charcoal);
}

.calc-mat-tag.best-seller {
  background: var(--gold-gradient);
  color: #FFFFFF;
}

.calc-mat-tag.luxury {
  background: #ef4444;
  color: #fff;
}

/* Step 4: Addons Grid */
.calc-addon-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.calc-addon-btn {
  background: #FFFFFF;
  border: 1px solid rgba(38, 38, 38, 0.15);
  border-radius: var(--radius-sm);
  padding: 10px 8px;
  text-align: center;
  cursor: pointer;
  color: var(--color-charcoal);
  font-size: 0.85rem;
  font-weight: 600;
  transition: var(--transition);
}

.calc-addon-btn:hover {
  border-color: var(--color-gold-primary);
  background: #FAF8F5;
}

.calc-addon-btn.active {
  border-color: var(--color-gold-primary);
  background: rgba(166, 124, 53, 0.15);
  color: var(--color-gold-primary);
  font-weight: 700;
}

/* Right Result Box */
.calc-result-container {
  background: #FFFFFF;
  border: 2px solid var(--color-gold-primary);
  border-radius: var(--radius-md);
  padding: 26px 22px;
  box-shadow: var(--shadow-card);
}

.calc-result-header {
  text-align: center;
  padding-bottom: 18px;
  border-bottom: 1px solid rgba(38, 38, 38, 0.1);
  margin-bottom: 20px;
}

.calc-result-tag {
  font-size: 0.8rem;
  font-weight: 800;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.calc-price-main {
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--color-gold-primary);
  margin: 6px 0;
}

.calc-price-note {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.calc-specs-list {
  list-style: none;
  font-size: 0.88rem;
  margin-bottom: 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.calc-spec-item {
  display: flex;
  justify-content: space-between;
  border-bottom: 1px dashed rgba(38, 38, 38, 0.12);
  padding-bottom: 6px;
}

.calc-spec-item span:first-child {
  color: var(--text-muted);
}

.calc-spec-item span:last-child {
  font-weight: 700;
  color: var(--color-charcoal);
  text-align: right;
}

.calc-highlights {
  background: var(--color-ivory);
  border: 1px solid var(--border-gold-subtle);
  border-radius: var(--radius-sm);
  padding: 14px;
  margin-bottom: 22px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 0.84rem;
  color: var(--color-charcoal);
}

.calc-hl-row {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--color-charcoal);
}

.calc-hl-row span {
  color: var(--color-charcoal);
  font-weight: 500;
}

.calc-hl-row svg {
  color: #16a34a;
  flex-shrink: 0;
}

.calc-cta-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.calc-btn-zalo {
  background: #FFFFFF;
  color: #0284c7;
  border: 2px solid #0284c7;
  font-weight: 800;
  padding: 13px 20px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  text-align: center;
  font-size: 0.95rem;
  transition: var(--transition);
  cursor: pointer;
}

.calc-btn-zalo:hover {
  background: #0284c7;
  color: #FFFFFF;
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(2, 132, 199, 0.25);
}

.calc-btn-quote {
  background: var(--gold-gradient);
  color: #FFFFFF;
  font-weight: 800;
  padding: 14px 20px;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-size: 0.98rem;
  transition: var(--transition);
  box-shadow: var(--shadow-gold);
}

.calc-btn-quote:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
  color: #FFFFFF;
}

/* 1. SERP Preview & Suggestion Chips */
.serp-preview-box {
  background: #FFFFFF;
  border: 1.5px solid var(--border-gold);
  border-radius: var(--radius-md);
  padding: 18px 22px;
  margin-bottom: 28px;
  box-shadow: var(--shadow-card);
  max-width: 620px;
}

.serp-price-line {
  font-size: 0.95rem;
  color: var(--color-charcoal);
  margin-bottom: 6px;
  line-height: 1.5;
}

.serp-price-line strong {
  color: var(--color-gold-primary);
  font-size: 1.05rem;
}

.serp-rating-line {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.95rem;
  margin-bottom: 14px;
}

.serp-score {
  font-weight: 800;
  color: #fff;
  background: #22c55e;
  padding: 2px 7px;
  border-radius: 4px;
  font-size: 0.8rem;
}

.serp-stars {
  color: #fbbf24;
  font-size: 1.1rem;
  letter-spacing: 1px;
}

.serp-count {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.serp-suggestion-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.serp-chip {
  background: var(--color-ivory);
  border: 1px solid var(--border-gold-subtle);
  color: var(--color-charcoal);
  padding: 5px 12px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  transition: var(--transition);
}

.serp-chip:hover {
  background: var(--color-gold-primary);
  color: #FFFFFF;
  border-color: var(--color-gold-primary);
}

/* 2. Brand 4 Pillars Section */
.brand-pillars-section {
  padding: 50px 0;
  background: #11141a;
  border-bottom: 1px solid var(--border-subtle);
}

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

.pillar-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 22px 18px;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: var(--transition);
}

.pillar-card:hover {
  border-color: var(--border-gold);
  transform: translateY(-4px);
  box-shadow: var(--shadow-gold);
}

.pillar-icon-box {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  background: rgba(212, 175, 55, 0.12);
  border: 1px solid var(--border-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-gold);
  flex-shrink: 0;
}

.pillar-info h4 {
  font-size: 0.95rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 4px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.pillar-info p {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.4;
}

/* 3. Space Use-Case Grid */
.space-usecase-section {
  padding: 85px 0;
  background: #0f1217;
  border-top: 1px solid var(--border-subtle);
}

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

.space-usecase-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 26px 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: var(--transition);
}

.space-usecase-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-gold);
  box-shadow: var(--shadow-gold);
  background: var(--bg-card);
}

.space-icon-badge {
  width: 50px;
  height: 50px;
  border-radius: var(--radius-sm);
  background: rgba(212, 175, 55, 0.12);
  border: 1px solid var(--border-gold);
  color: var(--primary-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
}

.space-card-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: #fff;
}

.space-card-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* 4. Executive Case Study Box & Metrics */
.case-study-section {
  padding: 85px 0;
  background: #0d0f13;
}

.case-study-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-gold);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  margin-bottom: 35px;
  box-shadow: var(--shadow-card);
}

.case-study-header .badge-tag {
  display: inline-block;
  background: rgba(212, 175, 55, 0.15);
  color: var(--text-gold);
  font-size: 0.78rem;
  font-weight: 800;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-gold);
  margin-bottom: 12px;
  text-transform: uppercase;
}

.case-study-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin: 24px 0;
}

.metric-item {
  background: #FFFFFF;
  border: 1px solid var(--border-gold-subtle);
  border-radius: var(--radius-sm);
  padding: 16px;
  text-align: center;
  box-shadow: 0 2px 10px rgba(38, 38, 38, 0.04);
}

.metric-num {
  font-size: 1.7rem;
  font-weight: 900;
  color: var(--color-gold-primary);
  display: block;
  margin-bottom: 4px;
}

.metric-label {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.client-quote {
  background: #FAF8F5;
  border-left: 4px solid var(--color-gold-primary);
  padding: 18px 22px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-style: italic;
  color: var(--color-charcoal);
  font-size: 0.95rem;
  line-height: 1.6;
}

.client-author {
  display: block;
  font-style: normal;
  font-weight: 700;
  color: var(--color-gold-primary);
  font-size: 0.88rem;
  margin-top: 10px;
  text-align: right;
}

/* 5. Comprehensive Price Matrix Table */
.pricing-table-section {
  padding: 85px 0;
  background: var(--color-ivory);
  border-top: 1px solid var(--border-gold-subtle);
}

.table-responsive {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-gold);
  box-shadow: var(--shadow-card);
}

.pricing-table {
  width: 100%;
  border-collapse: collapse;
  background: #FFFFFF;
  text-align: left;
  font-size: 0.92rem;
}

.pricing-table th {
  background: var(--color-charcoal);
  color: var(--color-gold-light);
  padding: 16px 20px;
  font-weight: 800;
  border-bottom: 2px solid var(--color-gold-primary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.pricing-table td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-light);
  color: var(--color-charcoal);
  font-weight: 500;
}

.pricing-table tr:nth-child(even) td {
  background: #FAF8F5;
}

.pricing-table tr:hover td {
  background: rgba(166, 124, 53, 0.08);
}

.pricing-table .price-val {
  font-weight: 800;
  color: var(--color-gold-primary);
  font-size: 1.05rem;
}

.pricing-table .badge-popular {
  background: #ef4444;
  color: #fff;
  font-size: 0.7rem;
  padding: 2px 6px;
  border-radius: 3px;
  margin-left: 6px;
  font-weight: bold;
}

.pricing-trust-banner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 24px;
}

.pricing-trust-col {
  background: #FFFFFF;
  border: 1px solid rgba(166, 124, 53, 0.25);
  border-radius: var(--radius-md);
  padding: 14px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.88rem;
  color: #334155;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
}

.pricing-trust-col svg {
  color: var(--color-gold-primary);
  flex-shrink: 0;
}

@media (max-width: 768px) {
  .pricing-trust-banner {
    grid-template-columns: 1fr;
  }
}

/* 6. Author & KTS Profile Section (E-E-A-T Chuẩn Hoá Hoàng Gia) */
.author-profile-box {
  background: #FFFFFF;
  border: 1.5px solid #EAD8B1;
  border-radius: 8px;
  padding: 35px 32px;
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 28px;
  align-items: center;
  margin: 40px 0;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.author-avatar-holder {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  border: 3px solid #B45309;
  padding: 4px;
  background: #1E2229;
  box-shadow: 0 6px 16px rgba(180, 83, 9, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  margin: 0 auto;
}

.author-avatar-holder img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  object-position: top center;
  display: block;
}

.author-avatar-holder svg {
  width: 95px;
  height: 95px;
  color: #D97706;
}

.author-info h3 {
  font-size: 1.5rem;
  color: #1E2229;
  font-weight: 800;
  margin-bottom: 4px;
  letter-spacing: -0.3px;
}

.author-title {
  color: #B45309;
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.author-bio {
  color: #374151;
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 18px;
}

.author-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.author-badge-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #FEF3C7;
  color: #92400E;
  border: 1px solid #FCD34D;
  font-size: 0.85rem;
  font-weight: 700;
  padding: 6px 14px;
  border-radius: 9999px;
}

/* 7. Sticky Bottom Conversion Bar for Mobile */
.mobile-sticky-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background: rgba(14, 16, 20, 0.98);
  border-top: 2px solid var(--border-gold);
  padding: 10px 16px;
  z-index: 998;
  backdrop-filter: blur(12px);
  box-shadow: 0 -4px 20px rgba(0,0,0,0.5);
}

.mobile-sticky-bar .bar-inner {
  display: flex;
  gap: 12px;
  align-items: center;
}

.mobile-sticky-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 0;
  border-radius: var(--radius-full);
  font-weight: 800;
  font-size: 0.95rem;
  text-align: center;
}

.mobile-btn-phone {
  background: #22c55e;
  color: #fff;
}

.mobile-btn-quote {
  background: var(--gold-gradient);
  color: #121316;
}

@media (max-width: 1024px) {
  .pillars-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .space-usecase-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .author-profile-box {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .author-avatar-holder {
    margin: 0 auto;
  }
  .author-title, .author-badges {
    justify-content: center;
  }
}

@media (max-width: 768px) {
  .topbar-info .topbar-item:first-child {
    display: none;
  }
  .nav-container {
    padding: 10px 16px;
  }
  .brand-logo img {
    height: 44px;
  }
  .btn-hotline-header span {
    display: none;
  }
  .btn-hotline-header {
    padding: 10px;
    border-radius: var(--radius-sm);
  }
  .btn-quote-cart span:not(.quote-count) {
    display: none;
  }
  .btn-quote-cart {
    padding: 8px 10px;
  }
  .hero-title {
    font-size: 2.1rem;
    line-height: 1.25;
  }
  .hero-section {
    padding: 40px 0 35px;
    min-height: auto;
  }
  .royal-value-bar {
    padding: 14px 16px;
  }
  .royal-price-tag {
    flex-direction: column;
    gap: 4px;
  }
  .royal-value-header {
    flex-direction: column;
    align-items: flex-start;
  }
  .hero-switcher-tabs {
    grid-template-columns: repeat(2, 1fr);
  }
  .hero-stats-bar {
    flex-wrap: wrap;
    gap: 20px;
    padding: 18px 16px;
    margin-top: 30px;
  }
  .hero-stat-card {
    flex: 0 0 calc(50% - 15px);
  }
  .hero-stat-divider {
    display: none;
  }
  .stat-number {
    font-size: 1.85rem;
  }
  .floating-badge {
    font-size: 0.72rem;
    padding: 5px 10px;
  }
  .badge-top-left {
    top: 10px;
    left: 10px;
  }
  .badge-top-right {
    top: 10px;
    right: 10px;
  }
  .badge-bottom-right {
    bottom: 95px;
    right: 10px;
  }
  .subpage-hero {
    padding: 36px 0;
  }
  .sidebar-perks {
    list-style: none !important;
    padding-left: 0 !important;
  }
  .subpage-title {
    font-size: 1.8rem;
  }
  /* Raise floating buttons above mobile sticky conversion bar */
  .floating-widget, .floating-cta {
    bottom: 75px !important;
  }
  .pillars-grid {
    grid-template-columns: 1fr;
  }
  .space-usecase-grid {
    grid-template-columns: 1fr;
  }
  .case-study-metrics {
    grid-template-columns: 1fr;
  }
  .mobile-sticky-bar {
    display: block;
    z-index: 1001;
  }
  body {
    padding-bottom: 70px;
  }
  .container {
    padding: 0 16px;
  }
  .table-responsive {
    margin: 15px -16px;
    padding: 0 16px;
    width: calc(100% + 32px);
  }
}

@media (max-width: 480px) {
  .brand-logo img {
    height: 38px;
  }
  .topbar {
    display: none;
  }
  .hero-title {
    font-size: 1.75rem;
  }
  .hero-desc {
    font-size: 0.98rem;
  }
  .btn-royal-primary, .btn-royal-call, .btn-primary, .btn-submit-form {
    width: 100%;
    text-align: center;
    justify-content: center;
  }
  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }
  .hero-stat-card {
    flex: 0 0 100%;
  }
  .subpage-title {
    font-size: 1.55rem;
  }
}

/* ==========================================================================
   MODERN ROYAL - SUBPAGE & ARTICLE DEDICATED STYLES
   ========================================================================== */

/* Subpage Hero Section */
.subpage-hero {
  position: relative;
  padding: 50px 0;
  background: linear-gradient(180deg, var(--color-ivory) 0%, #FFFFFF 100%);
  border-bottom: 1px solid var(--border-gold-subtle);
  overflow: hidden;
}

.subpage-hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    radial-gradient(circle at 20% 40%, rgba(197, 162, 97, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 80% 60%, rgba(166, 124, 53, 0.05) 0%, transparent 50%);
  pointer-events: none;
}

.subpage-hero .hero-inner,
.subpage-hero .subpage-hero-inner {
  position: relative;
  z-index: 2;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
}

.subpage-hero-inner > *:first-child,
.subpage-hero .hero-inner > *:first-child {
  margin-top: 0 !important;
}

.subpage-hero-inner > *:last-child,
.subpage-hero .hero-inner > *:last-child {
  margin-bottom: 0 !important;
}

/* Breadcrumb Navigation */
.breadcrumb-nav,
.breadcrumb,
ul.breadcrumb,
ol.breadcrumb {
  display: flex !important;
  align-items: center !important;
  flex-wrap: wrap !important;
  gap: 8px !important;
  margin-bottom: 20px !important;
  font-size: 0.9rem !important;
  list-style: none !important;
  list-style-type: none !important;
  padding: 0 !important;
  margin-left: 0 !important;
}

.breadcrumb-nav li,
.breadcrumb li,
ul.breadcrumb li,
ol.breadcrumb li {
  display: inline-flex !important;
  align-items: center !important;
  gap: 8px !important;
  list-style: none !important;
  list-style-type: none !important;
  color: var(--text-muted) !important;
  margin: 0 !important;
  padding: 0 !important;
}

.breadcrumb-nav a,
.breadcrumb a {
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition);
}

.breadcrumb-nav a:hover,
.breadcrumb a:hover {
  color: var(--color-gold-primary);
}

.breadcrumb-nav .separator,
.breadcrumb .separator {
  color: rgba(166, 124, 53, 0.5);
  font-size: 0.8rem;
}

.breadcrumb-nav .current,
.breadcrumb .current,
.breadcrumb span {
  color: var(--color-gold-primary);
  font-weight: 700;
}

/* Subpage Header Content */
.subpage-title {
  font-size: 2.5rem;
  line-height: 1.25;
  margin-bottom: 16px;
  color: var(--color-charcoal);
  font-weight: 800;
}

.subpage-subtitle,
.subpage-lead {
  font-size: 1.12rem;
  color: var(--text-muted);
  max-width: 820px;
  line-height: 1.7;
  margin-bottom: 28px;
}

.subpage-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 30px;
}

.subpage-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(20, 27, 41, 0.8);
  border: 1px solid var(--border-gold-subtle);
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  color: #f1f5f9;
  backdrop-filter: blur(8px);
}

.subpage-badge svg {
  color: var(--primary-gold);
}

/* Subpage Main Content & Layout */
.subpage-content-wrapper {
  max-width: 1280px;
  margin: 0 auto;
  padding: 50px 20px 80px;
}

/* Technical Specification Table */
.spec-table-box {
  background: #FFFFFF;
  border: 1px solid var(--border-gold-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  margin-bottom: 45px;
}

.spec-table-header {
  background: linear-gradient(135deg, #1E2229 0%, #121316 100%);
  padding: 18px 24px;
  border-bottom: 1px solid var(--border-gold-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.spec-table-header h3 {
  font-size: 1.15rem;
  color: #FFE57F;
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.spec-table th {
  background: #F8F6F0;
  color: #1E2229;
  font-weight: 700;
  padding: 15px 20px;
  font-size: 0.92rem;
  border-bottom: 2px solid #C5A261;
}

.spec-table td {
  padding: 15px 20px;
  color: #374151;
  font-size: 0.92rem;
  line-height: 1.6;
  border-bottom: 1px solid #E5E7EB;
}

.spec-table td strong {
  color: #111827;
  font-weight: 700;
}

.spec-table td:last-child {
  color: #B45309;
  font-weight: 700;
}

.spec-table tr:nth-child(even) td {
  background: #FCFBF9;
}

.spec-table tr:hover td {
  background: #FFFDF5;
}

/* Gallery Showcase Grid */
.royal-gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 50px;
}

.royal-gallery-card {
  background: #FFFFFF;
  border: 1px solid #E5E7EB;
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  box-shadow: 0 4px 15px rgba(0,0,0,0.04);
}

.royal-gallery-card:hover {
  transform: translateY(-5px);
  border-color: var(--color-gold-primary);
  box-shadow: 0 10px 25px rgba(166, 124, 53, 0.15);
}

.royal-gallery-img {
  position: relative;
  aspect-ratio: 16/10;
  overflow: hidden;
  background: #F3F4F6;
}

.royal-gallery-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.royal-gallery-card:hover .royal-gallery-img img {
  transform: scale(1.05);
}

.royal-gallery-body {
  padding: 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.royal-gallery-cat {
  font-size: 0.8rem;
  color: var(--color-gold-primary);
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.5px;
  margin-bottom: 6px;
}

.royal-gallery-title {
  font-size: 1.15rem;
  color: var(--color-charcoal);
  font-weight: 700;
  margin-bottom: 10px;
  line-height: 1.4;
}

.royal-gallery-desc {
  font-size: 0.88rem;
  color: #64748B;
  line-height: 1.6;
  margin-bottom: 16px;
  flex: 1;
}

.royal-gallery-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid #F3F4F6;
}

.royal-gallery-price {
  font-size: 1.05rem;
  font-weight: 800;
  color: #B45309;
}

/* Article Layout & Typography */
.article-wrapper {
  max-width: 1280px;
  margin: 0 auto;
  padding: 40px 20px 80px;
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 40px;
  align-items: start;
}

.article-main {
  background: var(--bg-card);
  border: 1px solid var(--border-gold-subtle);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-card);
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  padding-bottom: 24px;
  margin-bottom: 28px;
  border-bottom: 1px solid #e2e8f0;
  font-size: 0.9rem;
  color: #64748b;
}

.article-meta span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: #64748b;
}

.article-meta .author-name {
  color: #996515;
  font-weight: 700;
}

/* Sticky Table of Contents Sidebar */
.article-toc-box {
  background: #FAF8F5;
  border: 1px solid var(--border-gold-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-bottom: 35px;
}

.article-toc-title {
  font-size: 1.15rem;
  color: #996515;
  font-weight: 700;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.article-toc-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.article-toc-list li {
  margin-bottom: 10px;
  position: relative;
  padding-left: 18px;
  font-size: 0.92rem;
}

.article-toc-list li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--primary-gold);
}

.article-toc-list a {
  color: #475569;
  text-decoration: none;
  transition: var(--transition);
}

.article-toc-list a:hover {
  color: var(--primary-gold);
  padding-left: 4px;
}

/* Article Content Elements */
.article-body {
  font-size: 1.05rem;
  line-height: 1.85;
  color: #334155;
}

.article-body h2 {
  font-size: 1.65rem;
  color: #1a202c;
  margin: 36px 0 16px;
  position: relative;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--border-gold-subtle);
}

.article-body h3 {
  font-size: 1.3rem;
  color: #1e293b;
  margin: 28px 0 12px;
}

.article-body h4 {
  font-size: 1.15rem;
  color: #1e293b;
  margin: 24px 0 10px;
}

.article-body p {
  color: #334155;
  margin-bottom: 20px;
  line-height: 1.85;
}

.article-body ul, .article-body ol {
  margin: 0 0 24px 24px;
  color: #334155;
}

.article-body li {
  margin-bottom: 8px;
  color: #334155;
}

.royal-callout {
  background: #FFFDF9;
  border: 1px solid #EAD8B1;
  border-left: 5px solid #AA771C;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 22px 26px;
  margin: 28px 0;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.04);
}

.royal-callout-title {
  color: #996515;
  font-weight: 800;
  font-size: 1.1rem;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.royal-callout p {
  color: #374151 !important;
  font-size: 0.95rem;
  line-height: 1.65;
  margin-bottom: 12px;
}

.royal-callout a {
  color: #996515 !important;
  font-weight: 700;
  text-decoration: underline;
  display: inline-block;
  transition: var(--transition);
}

.royal-callout a:hover {
  color: #D4AF37 !important;
}

.article-img-frame {
  margin: 32px 0;
  border: 1px solid var(--border-gold-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  background: #090c12;
}

.article-img-caption {
  padding: 12px 18px;
  background: #101520;
  font-size: 0.88rem;
  color: #94a3b8;
  text-align: center;
  font-style: italic;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

/* Author Bio Card */
.author-bio-card {
  margin-top: 45px;
  padding: 24px;
  background: linear-gradient(135deg, #0f172a, #1e293b);
  border: 1px solid rgba(212, 160, 23, 0.4);
  border-radius: var(--radius-md);
  display: flex;
  gap: 20px;
  align-items: center;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.25);
}

.author-bio-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  border: 2px solid #F8BE1A !important;
  overflow: hidden;
  flex-shrink: 0;
}

.author-bio-text h4 {
  color: #FFE57F !important;
  font-size: 1.2rem;
  font-weight: 800;
  margin-bottom: 6px;
  letter-spacing: 0.5px;
}

.author-bio-text p {
  color: #e2e8f0 !important;
  font-size: 0.92rem;
  line-height: 1.65;
  margin-bottom: 0;
}

.author-bio-text strong {
  color: #F8BE1A !important;
  font-weight: 700;
}

/* Sticky Sidebar in Article & Subpages */
.article-sidebar {
  position: sticky;
  top: 100px;
}

@media (max-width: 1024px) {
  .royal-gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .article-wrapper {
    grid-template-columns: 1fr;
  }
  .article-sidebar {
    position: static;
  }
}

@media (max-width: 640px) {
  .subpage-title {
    font-size: 1.9rem;
  }
  .royal-gallery-grid {
    grid-template-columns: 1fr;
  }
  .article-main {
    padding: 24px 16px;
  }
  .author-bio-card {
    flex-direction: column;
    text-align: center;
  }
}

/* CTA Banner Section (Bocghesofa.info Architecture) */
.cta-banner-section {
  padding: 60px 0;
  background: var(--color-ivory);
  border-top: 1px solid var(--border-gold-subtle);
}

.cta-banner-luxury-card {
  background: linear-gradient(135deg, var(--color-charcoal) 0%, #1c1c1c 100%);
  border: 2px solid var(--color-gold-primary);
  border-radius: var(--radius-lg);
  padding: 48px 44px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  box-shadow: var(--shadow-card), var(--shadow-gold);
  position: relative;
  overflow: hidden;
}

.cta-banner-luxury-card::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(212, 175, 55, 0.12) 0%, transparent 70%);
  pointer-events: none;
}

.cta-luxury-left {
  max-width: 650px;
}

.cta-top-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(212, 175, 55, 0.15);
  color: var(--primary-gold-light);
  font-size: 0.8rem;
  font-weight: 800;
  padding: 5px 14px;
  border-radius: var(--radius-full);
  margin-bottom: 16px;
  border: 1px solid var(--border-gold-subtle);
  letter-spacing: 0.5px;
}

.cta-luxury-left h2 {
  font-size: 2.2rem;
  color: #fff;
  line-height: 1.3;
  margin-bottom: 14px;
}

.cta-luxury-left p {
  font-size: 1rem;
  color: #cbd5e1;
  line-height: 1.65;
  margin-bottom: 20px;
}

.cta-trust-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.cta-trust-chips span {
  display: inline-flex;
  align-items: center;
  padding: 6px 14px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  color: #e2e8f0;
}

.cta-luxury-right {
  text-align: center;
  min-width: 280px;
}

.cta-phone-box {
  background: rgba(8, 10, 14, 0.8);
  border: 1px solid var(--border-gold-subtle);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin-bottom: 16px;
}

.phone-label {
  display: block;
  font-size: 0.78rem;
  font-weight: 800;
  color: var(--primary-gold);
  letter-spacing: 1px;
  margin-bottom: 4px;
}

.phone-link {
  font-size: 1.8rem;
  font-weight: 900;
  color: #FFE57F;
  text-decoration: none;
  display: block;
  transition: var(--transition);
}

.phone-link:hover {
  color: #fff;
}

.phone-note {
  display: block;
  font-size: 0.8rem;
  color: #94a3b8;
  margin-top: 4px;
}

@media (max-width: 900px) {
  .cta-banner-luxury-card {
    flex-direction: column;
    padding: 32px 24px;
    text-align: center;
  }
  .cta-luxury-left {
    max-width: 100%;
  }
  .cta-trust-chips {
    justify-content: center;
  }
}

/* ==========================================================================
   TIN TỨC & KIẾN THỨC CHIA SẺ SECTION
   ========================================================================== */
.news-section {
  padding: 65px 0 75px;
  background: #f8fafc;
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}

.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-top: 36px;
  margin-bottom: 40px;
}

.news-card {
  background: #ffffff;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(166, 124, 53, 0.22);
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
  display: flex;
  flex-direction: column;
  transition: transform 0.35s ease, box-shadow 0.35s ease, border-color 0.35s ease;
}

.news-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 14px 30px rgba(166, 124, 53, 0.16);
  border-color: var(--color-gold-primary);
}

.news-thumb-wrapper {
  position: relative;
  height: 220px;
  overflow: hidden;
  background: #11141a;
}

.news-thumb {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.news-card:hover .news-thumb {
  transform: scale(1.08);
}

.news-tag {
  position: absolute;
  top: 14px;
  left: 14px;
  background: rgba(18, 22, 28, 0.88);
  backdrop-filter: blur(6px);
  color: #FFE57F;
  border: 1px solid rgba(212, 163, 89, 0.5);
  font-size: 0.72rem;
  font-weight: 800;
  padding: 4px 10px;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

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

.news-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.82rem;
  color: #64748b;
  margin-bottom: 12px;
}

.news-meta span {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.news-title {
  font-size: 1.15rem;
  font-weight: 800;
  line-height: 1.45;
  color: var(--color-charcoal);
  margin-bottom: 12px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-title a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}

.news-title a:hover {
  color: var(--color-gold-primary);
}

.news-excerpt {
  font-size: 0.9rem;
  color: #475569;
  line-height: 1.65;
  margin-bottom: 18px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex-grow: 1;
}

.news-footer {
  border-top: 1px solid #f1f5f9;
  padding-top: 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.news-readmore {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.88rem;
  font-weight: 800;
  color: var(--color-gold-primary);
  text-decoration: none;
  transition: gap 0.2s ease, color 0.2s ease;
}

.news-readmore:hover {
  color: #8c6320;
  gap: 10px;
}

.news-author-badge {
  font-size: 0.8rem;
  color: #64748b;
  font-weight: 600;
}

.news-action-center {
  text-align: center;
  margin-top: 10px;
}

.btn-news-all {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 30px;
  background: #ffffff;
  color: var(--color-charcoal);
  border: 2px solid var(--color-gold-primary);
  border-radius: var(--radius-md);
  font-weight: 800;
  font-size: 0.95rem;
  text-decoration: none;
  transition: all 0.3s ease;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.btn-news-all:hover {
  background: var(--gold-gradient);
  color: #ffffff;
  border-color: transparent;
  box-shadow: 0 6px 20px rgba(166, 124, 53, 0.35);
  transform: translateY(-2px);
}

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

@media (max-width: 640px) {
  .news-grid {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   CÔNG TRÌNH THỰC TẾ TIÊU BIỂU (STANDALONE LUXURY SHOWCASE)
   ========================================================================== */
.case-study-section {
  padding: 75px 0 85px;
  background: #0d1117;
  position: relative;
  overflow: hidden;
  border-top: 1px solid rgba(212, 175, 55, 0.3);
  border-bottom: 1px solid rgba(212, 175, 55, 0.3);
}

.case-study-section .section-header-center {
  text-align: center;
  max-width: 820px;
  margin: 0 auto 48px;
}

.case-study-section .section-subtitle {
  color: #FFE57F;
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 10px;
  display: inline-block;
}

.case-study-section .section-title {
  color: #ffffff;
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 14px;
}

.case-study-section .section-desc {
  color: #94a3b8;
  font-size: 1rem;
  line-height: 1.6;
}

.case-study-featured-card {
  background: #161b24;
  border: 1px solid rgba(212, 175, 55, 0.35);
  border-radius: var(--radius-lg);
  padding: 32px;
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 36px;
  margin-bottom: 35px;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.4);
}

.case-featured-media {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.case-featured-main-img {
  position: relative;
  height: 330px;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.case-featured-main-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.case-status-badge {
  position: absolute;
  top: 14px;
  left: 14px;
  background: rgba(10, 14, 20, 0.88);
  backdrop-filter: blur(8px);
  color: #FFE57F;
  border: 1px solid rgba(212, 175, 55, 0.5);
  font-size: 0.75rem;
  font-weight: 800;
  padding: 5px 12px;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  letter-spacing: 0.5px;
}

.status-dot {
  width: 7px;
  height: 7px;
  background: #22c55e;
  border-radius: 50%;
  display: inline-block;
  box-shadow: 0 0 8px #22c55e;
}

.case-featured-gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.case-thumb-item {
  position: relative;
  height: 80px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.case-thumb-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.case-thumb-item span {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(0, 0, 0, 0.75);
  color: #e2e8f0;
  font-size: 0.7rem;
  text-align: center;
  padding: 2px 4px;
  font-weight: 600;
}

.case-featured-info {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.case-project-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.case-project-meta .badge-tag {
  background: rgba(212, 175, 55, 0.15);
  color: #FFE57F;
  font-size: 0.78rem;
  font-weight: 800;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(212, 175, 55, 0.4);
}

.case-project-meta .project-year {
  color: #94a3b8;
  font-size: 0.82rem;
}

.case-featured-title {
  font-size: 1.5rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 12px;
  line-height: 1.35;
}

.case-featured-text {
  font-size: 0.92rem;
  color: #cbd5e1;
  line-height: 1.65;
  margin-bottom: 16px;
}

.case-study-section .case-study-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 0 0 18px;
}

.case-study-section .metric-item {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(212, 175, 55, 0.2);
  border-radius: var(--radius-md);
  padding: 12px 8px;
  text-align: center;
}

.case-study-section .metric-num {
  font-size: 1.35rem;
  font-weight: 900;
  color: #FFE57F;
  display: block;
  margin-bottom: 2px;
}

.case-study-section .metric-label {
  font-size: 0.75rem;
  color: #94a3b8;
  line-height: 1.3;
}

.case-study-section .client-quote {
  background: rgba(212, 175, 55, 0.06);
  border-left: 3px solid var(--color-gold-primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 14px 18px;
  font-style: italic;
  color: #e2e8f0;
  font-size: 0.88rem;
  line-height: 1.6;
}

.case-study-section .client-author {
  display: block;
  font-style: normal;
  font-weight: 700;
  color: #FFE57F;
  font-size: 0.82rem;
  margin-top: 8px;
  text-align: right;
}

.case-satellite-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  margin-bottom: 35px;
}

.case-satellite-card {
  background: #161b24;
  border: 1px solid rgba(212, 175, 55, 0.22);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.case-satellite-card:hover {
  transform: translateY(-5px);
  border-color: var(--color-gold-primary);
}

.case-sat-thumb {
  height: 180px;
  position: relative;
  overflow: hidden;
}

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

.case-satellite-card:hover .case-sat-thumb img {
  transform: scale(1.06);
}

.sat-tag {
  position: absolute;
  top: 10px;
  left: 10px;
  background: rgba(10, 14, 20, 0.85);
  backdrop-filter: blur(4px);
  color: #FFE57F;
  font-size: 0.7rem;
  font-weight: 800;
  padding: 3px 8px;
  border-radius: 4px;
  border: 1px solid rgba(212, 175, 55, 0.3);
}

.case-sat-body {
  padding: 18px;
}

.case-sat-body h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 8px;
}

.sat-specs {
  font-size: 0.84rem;
  color: #94a3b8;
  line-height: 1.5;
  margin-bottom: 14px;
}

.sat-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 10px;
  font-size: 0.78rem;
  color: #64748b;
}

.sat-status {
  color: #22c55e;
  font-weight: 700;
}

.case-action-center {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

@media (max-width: 1024px) {
  .case-study-featured-card {
    grid-template-columns: 1fr;
  }
  .case-satellite-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .case-satellite-grid {
    grid-template-columns: 1fr;
  }
  .case-featured-main-img {
    height: 230px;
  }
}

/* ==========================================================================
   HỒ SƠ CHUYÊN GIA & QUY TRÌNH 6 BƯỚC (STANDALONE SECTION)
   ========================================================================== */
.expert-process-section {
  padding: 75px 0 85px;
  background: #f8fafc;
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}

.expert-process-section .section-header-center {
  text-align: center;
  max-width: 820px;
  margin: 0 auto 40px;
}

.expert-process-section .author-profile-box {
  margin: 0 0 50px;
  border: 1.5px solid rgba(166, 124, 53, 0.3);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.05);
}

.process-box {
  background: #ffffff;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(166, 124, 53, 0.25);
  padding: 36px 30px 40px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.04);
}

.process-box-header {
  text-align: center;
  margin-bottom: 30px;
}

.process-box-title {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--color-charcoal);
  margin-bottom: 6px;
}

.process-box-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
}

.process-box .process-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
}

.process-box .process-card {
  background: #FAF8F5;
  border: 1px solid rgba(166, 124, 53, 0.18);
  border-radius: var(--radius-md);
  padding: 22px 14px;
  text-align: center;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.process-box .process-card:hover {
  transform: translateY(-5px);
  border-color: var(--color-gold-primary);
  box-shadow: 0 8px 20px rgba(166, 124, 53, 0.15);
}

.process-box .process-card h4 {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--color-charcoal);
  margin-bottom: 8px;
}

.process-box .process-card p {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.5;
}

@media (max-width: 1100px) {
  .process-box .process-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }
}

@media (max-width: 640px) {
  .process-box .process-grid {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   STANDALONE CALCULATOR SECTION (BẢNG DỰ TOÁN CHI PHÍ TỰ ĐỘNG)
   ========================================================================== */
.calculator-standalone-section {
  padding: 85px 0 95px;
  background: linear-gradient(180deg, #FAF8F5 0%, #F5EFEB 50%, #FAF8F5 100%);
  position: relative;
  border-top: 1px solid var(--border-gold-subtle);
  border-bottom: 1px solid var(--border-gold-subtle);
}

.calculator-standalone-section .iron-calc-card {
  background: #FFFFFF;
  border: 2px solid var(--color-gold-primary);
  border-radius: 8px;
  padding: 45px 38px;
  box-shadow: 0 16px 45px rgba(0, 0, 0, 0.08);
  position: relative;
  overflow: hidden;
}

.calculator-standalone-section .iron-calc-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 5px;
  background: linear-gradient(90deg, #A67C35, #E5C07B, #A67C35);
}

/* ==========================================================================
   PRICING NOTE BANNER & CTA BUTTONS (8PX BORDER-RADIUS)
   ========================================================================== */
.pricing-note-banner {
  background: #FFFFFF;
  border: 1px solid var(--border-gold-subtle);
  border-radius: 8px;
  padding: 22px 26px;
  margin-top: 24px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
}

.pricing-note-banner p {
  color: var(--text-dark);
  font-size: 0.92rem;
  line-height: 1.6;
  margin-bottom: 18px;
}

.pricing-cta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
}

/* Global Strict 8px Button Radius Rule */
.btn-royal-primary,
.btn-royal-call,
.btn-primary,
.btn-secondary,
.btn-outline,
.calc-btn-zalo,
.calc-btn-quote,
.calc-type-btn,
.calc-material-btn,
.calc-addon-btn,
.filter-tab,
.hero-tab-btn,
.sidebar-btn-submit,
.btn-submit-form,
.btn-quote-cart,
.mobile-sticky-btn {
  border-radius: 8px !important;
}

@media (max-width: 768px) {
  .calculator-standalone-section {
    padding: 55px 0 65px;
  }
  .calculator-standalone-section .iron-calc-card {
    padding: 28px 18px;
    border-radius: 8px;
  }
}

/* ==========================================================================
   COMPREHENSIVE RESPONSIVE MOBILE OPTIMIZATIONS (GLOBAL SITE-WIDE)
   ========================================================================== */

/* Tablet & Mobile Breakpoint (<= 1024px) */
@media (max-width: 1024px) {
  .page-layout,
  .container > .page-layout {
    display: flex !important;
    flex-direction: column !important;
    gap: 32px !important;
    padding: 24px 0 60px !important;
  }

  .main-column,
  main.main-column {
    width: 100% !important;
    max-width: 100% !important;
    min-width: 0 !important;
  }

  .sidebar,
  aside.sidebar,
  .sidebar-vertical-banner,
  .article-sidebar {
    width: 100% !important;
    max-width: 100% !important;
    position: static !important;
    top: auto !important;
    margin-top: 10px !important;
  }

  .sidebar-widget {
    width: 100% !important;
    max-width: 100% !important;
  }
}

/* Mobile Devices (<= 768px) */
@media (max-width: 768px) {
  /* Header & Navigation */
  .nav-container {
    padding: 10px 16px !important;
  }
  .brand-logo img {
    height: 40px !important;
    max-width: 210px !important;
    width: auto !important;
  }

  /* Subpage Hero */
  .subpage-hero {
    padding: 35px 0 !important;
  }
  .subpage-title {
    font-size: 1.65rem !important;
    line-height: 1.3 !important;
  }
  .subpage-lead {
    font-size: 0.95rem !important;
  }
  .subpage-badges {
    gap: 8px !important;
  }
  .subpage-badge {
    font-size: 0.78rem !important;
    padding: 6px 12px !important;
  }

  /* Hide Desktop Floating Action Buttons on mobile (Sticky bar handles it) */
  .floating-cta,
  .floating-widget,
  .float-btn {
    display: none !important;
  }

  /* Ensure Mobile Sticky Bar is clean and above content */
  .mobile-sticky-bar {
    display: block !important;
    z-index: 10000 !important;
    box-shadow: 0 -4px 15px rgba(0, 0, 0, 0.25) !important;
  }

  /* Article and Card grids */
  .royal-gallery-grid,
  .product-grid,
  .space-usecase-grid,
  .features-grid,
  .pillars-grid,
  .process-box .process-grid {
    grid-template-columns: 1fr !important;
    gap: 20px !important;
  }

  .royal-gallery-img {
    height: 220px !important;
  }

  /* Tables horizontal scrolling */
  .table-responsive {
    overflow-x: auto !important;
    -webkit-overflow-scrolling: touch !important;
    margin: 15px -12px !important;
    padding: 0 12px !important;
    width: calc(100% + 24px) !important;
  }

  .pricing-table {
    min-width: 580px !important;
  }

  /* Form and Input Elements */
  .form-grid {
    grid-template-columns: 1fr !important;
    gap: 12px !important;
  }

  .btn-submit-form,
  .btn-royal-primary,
  .btn-royal-call {
    width: 100% !important;
    text-align: center !important;
    justify-content: center !important;
    padding: 14px 18px !important;
  }

  /* CTA Banner on mobile */
  .cta-banner-luxury-card {
    flex-direction: column !important;
    padding: 28px 18px !important;
    text-align: center !important;
    gap: 24px !important;
  }

  .cta-luxury-right {
    width: 100% !important;
    min-width: 0 !important;
  }

  .cta-phone-box {
    padding: 16px !important;
  }

  .phone-link {
    font-size: 1.5rem !important;
  }

  /* Footer on mobile */
  .footer-grid {
    grid-template-columns: 1fr !important;
    gap: 32px !important;
  }
}

/* Small Screens (<= 480px) */
@media (max-width: 480px) {
  .subpage-title {
    font-size: 1.45rem !important;
  }
  .brand-logo img {
    height: 36px !important;
    max-width: 185px !important;
  }
}