/* CSS Custom Variables & Design Tokens - VIBRANT SOCIAL & E-COMMERCE THEME */
:root {
  --font-sans: 'Be Vietnam Pro', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  
  /* Light Theme - Clean White with Vibrant Shopee Orange & TikTok Rose accents */
  --bg-main: #fafafa;
  --bg-card: #ffffff;
  --bg-card-subtle: #f4f5f8;
  --bg-header: rgba(255, 255, 255, 0.92);
  --border-color: #ebeef5;
  --border-focus: #fe2c55;
  
  --text-main: #111827;
  --text-muted: #4b5563;
  --text-light: #9ca3af;
  
  /* Brand Vibrant Palette (Shopee Flame -> TikTok Rose -> Meta Violet) */
  --primary: #fe2c55;
  --primary-hover: #e02447;
  --primary-light: rgba(254, 44, 85, 0.08);
  --primary-gradient: linear-gradient(135deg, #ff5722 0%, #fe2c55 55%, #8b5cf6 100%);
  --primary-gradient-hover: linear-gradient(135deg, #f4511e 0%, #e02447 55%, #7c3aed 100%);
  --accent-orange: #ff5722;
  --accent-pink: #fe2c55;
  --accent-purple: #8b5cf6;
  
  --shopee: #ee4d2d;
  --tiktok: #000000;
  --facebook: #1877f2;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 6px 16px -2px rgba(254, 44, 85, 0.08), 0 3px 6px -2px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 12px 28px -4px rgba(254, 44, 85, 0.12), 0 6px 12px -4px rgba(0, 0, 0, 0.06);
  --shadow-xl: 0 24px 38px -6px rgba(254, 44, 85, 0.18), 0 10px 16px -6px rgba(0, 0, 0, 0.08);
  --glow-btn: 0 6px 20px rgba(254, 44, 85, 0.38);
}

[data-theme="dark"] {
  --bg-main: #0b0c10;
  --bg-card: #14161f;
  --bg-card-subtle: #1c1f2e;
  --bg-header: rgba(11, 12, 16, 0.92);
  --border-color: #262a3d;
  --border-focus: #fe2c55;
  
  --text-main: #ffffff;
  --text-muted: #a3a8be;
  --text-light: #6e7492;
  
  --primary: #fe2c55;
  --primary-hover: #ff4d6d;
  --primary-light: rgba(254, 44, 85, 0.15);
  --primary-gradient: linear-gradient(135deg, #ff5722 0%, #fe2c55 55%, #a855f7 100%);
  --primary-gradient-hover: linear-gradient(135deg, #ff7043 0%, #ff4d6d 55%, #c084fc 100%);
  --accent-orange: #ff7043;
  --accent-pink: #ff4d6d;
  --accent-purple: #c084fc;
  
  --shopee: #ff5722;
  --tiktok: #ffffff;
  --facebook: #2d88ff;
  --success: #34d399;
  --warning: #fbbf24;
  --danger: #f87171;
  
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.6);
  --shadow-md: 0 6px 20px rgba(0, 0, 0, 0.6);
  --shadow-lg: 0 14px 30px rgba(0, 0, 0, 0.7), 0 0 15px rgba(254, 44, 85, 0.15);
  --shadow-xl: 0 25px 45px rgba(0, 0, 0, 0.8), 0 0 25px rgba(254, 44, 85, 0.22);
  --glow-btn: 0 6px 22px rgba(254, 44, 85, 0.5);
}

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

html {
  font-family: var(--font-sans);
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.6;
  transition: background-color 0.3s ease, color 0.3s ease;
  overflow-x: hidden;
}

/* Layout Container */
.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header & Navigation */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--bg-header);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  transition: all 0.3s ease;
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  text-decoration: none;
  font-weight: 900;
  font-size: 1.4rem;
  letter-spacing: -0.5px;
  color: var(--text-main);
}

.logo-badge {
  background: var(--primary-gradient);
  color: #ffffff;
  padding: 0.35rem 0.75rem;
  border-radius: 10px;
  font-size: 1.05rem;
  font-weight: 900;
  box-shadow: 0 4px 14px rgba(254, 44, 85, 0.4);
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.logo-sub {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--text-muted);
  display: block;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 1.5rem;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  text-decoration: none;
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.5rem 0;
  transition: all 0.2s ease;
}

.nav-link:hover,
.nav-item:hover > .nav-link {
  color: var(--primary);
}

.nav-link svg {
  transition: transform 0.2s ease;
}

.nav-item:hover > .nav-link svg {
  transform: rotate(180deg);
}

/* Mega / Dropdown Menus */
.dropdown-menu {
  position: absolute;
  top: 100%;
  left: -20px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  box-shadow: var(--shadow-xl);
  min-width: 270px;
  padding: 0.85rem;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: none;
  z-index: 100;
}

.nav-item:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  pointer-events: auto;
}

.dropdown-link {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.75rem 0.85rem;
  text-decoration: none;
  border-radius: 12px;
  color: var(--text-main);
  font-size: 0.9rem;
  font-weight: 600;
  transition: all 0.15s ease;
}

.dropdown-link:hover {
  background: var(--primary-light);
  color: var(--primary);
  transform: translateX(3px);
}

.dropdown-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--primary-light);
  color: var(--primary);
  flex-shrink: 0;
  font-size: 1.1rem;
}

.badge-hot {
  font-size: 0.7rem;
  font-weight: 800;
  padding: 2px 7px;
  border-radius: 9999px;
  background: linear-gradient(135deg, #ff5722, #fe2c55);
  color: #ffffff;
  margin-left: auto;
  box-shadow: 0 2px 6px rgba(254, 44, 85, 0.4);
}

.badge-new {
  font-size: 0.7rem;
  font-weight: 800;
  padding: 2px 7px;
  border-radius: 9999px;
  background: linear-gradient(135deg, #8b5cf6, #ec4899);
  color: #ffffff;
  margin-left: auto;
  box-shadow: 0 2px 6px rgba(139, 92, 246, 0.4);
}

/* Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.theme-toggle-btn {
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  width: 42px;
  height: 42px;
  border-radius: 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.theme-toggle-btn:hover {
  background: var(--primary-light);
  color: var(--primary);
  border-color: var(--primary);
  transform: rotate(15deg);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background: var(--primary-gradient);
  color: #ffffff !important;
  font-weight: 700;
  font-size: 0.95rem;
  padding: 0.75rem 1.5rem;
  border-radius: 12px;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.25s ease;
  box-shadow: var(--glow-btn);
}

.btn-primary:hover {
  background: var(--primary-gradient-hover);
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(254, 44, 85, 0.5);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background: var(--bg-card);
  color: var(--text-main);
  font-weight: 700;
  font-size: 0.95rem;
  padding: 0.75rem 1.5rem;
  border-radius: 12px;
  border: 1.5px solid var(--border-color);
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s ease;
}

.btn-secondary:hover {
  background: var(--bg-card-subtle);
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
}

/* Mobile Hamburger */
.mobile-toggle-btn {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-main);
  cursor: pointer;
  padding: 0.5rem;
}

/* Hero Section */
.hero-section {
  padding: 135px 0 65px;
  position: relative;
  overflow: hidden;
}

.hero-glow {
  position: absolute;
  top: -15%;
  left: 50%;
  transform: translateX(-50%);
  width: 750px;
  height: 500px;
  background: radial-gradient(circle, rgba(254, 44, 85, 0.2) 0%, rgba(255, 87, 34, 0.12) 40%, rgba(139, 92, 246, 0.05) 70%, transparent 90%);
  pointer-events: none;
  z-index: 0;
  filter: blur(40px);
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 1.1rem;
  background: var(--primary-light);
  border: 1px solid rgba(254, 44, 85, 0.35);
  border-radius: 9999px;
  color: var(--primary);
  font-size: 0.85rem;
  font-weight: 800;
  margin-bottom: 1.75rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  box-shadow: 0 2px 10px rgba(254, 44, 85, 0.15);
}

.hero-title {
  font-size: clamp(2.3rem, 4.8vw, 3.85rem);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -1px;
  margin-bottom: 1.35rem;
}

.gradient-text {
  background: linear-gradient(135deg, #ff5722 0%, #fe2c55 45%, #a855f7 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: clamp(1.05rem, 1.5vw, 1.25rem);
  color: var(--text-muted);
  max-width: 740px;
  margin: 0 auto 2.25rem;
  line-height: 1.65;
  font-weight: 500;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.15rem;
  flex-wrap: wrap;
  margin-bottom: 4rem;
}

/* Stats Matrix */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 2.25rem 1.5rem;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}

.stats-grid::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--primary-gradient);
}

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

.stat-item:not(:last-child)::after {
  content: '';
  position: absolute;
  right: -0.625rem;
  top: 15%;
  height: 70%;
  width: 1px;
  background: var(--border-color);
}

.stat-number {
  font-size: clamp(2rem, 2.6vw, 2.8rem);
  font-weight: 900;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.2;
  margin-bottom: 0.35rem;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: 600;
}

/* Brand Partners Bar */
.partners-section {
  padding: 3rem 0;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-card-subtle);
}

.partners-title {
  text-align: center;
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1.2px;
  margin-bottom: 1.75rem;
}

.partners-logos {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2.5rem;
  flex-wrap: wrap;
}

.partner-badge {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.75rem 1.35rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  font-weight: 800;
  font-size: 0.95rem;
  color: var(--text-main);
  box-shadow: var(--shadow-sm);
  transition: all 0.25s ease;
}

.partner-badge:hover {
  transform: translateY(-3px);
  border-color: var(--primary);
  box-shadow: 0 8px 20px rgba(254, 44, 85, 0.15);
}

/* Section Headings */
.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 3.5rem;
}

.section-tag {
  color: var(--primary);
  font-weight: 800;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 0.65rem;
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: var(--primary-light);
  border-radius: 9999px;
}

.section-title {
  font-size: clamp(1.9rem, 3.2vw, 2.6rem);
  font-weight: 900;
  letter-spacing: -0.5px;
  margin-bottom: 0.85rem;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* Services Grid */
.services-section {
  padding: 5.5rem 0;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 2.25rem;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  display: flex;
  flex-direction: column;
}

.service-card:hover {
  transform: translateY(-6px);
  border-color: rgba(254, 44, 85, 0.4);
  box-shadow: var(--shadow-xl);
}

.service-icon-box {
  width: 58px;
  height: 58px;
  border-radius: 16px;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  box-shadow: 0 4px 12px rgba(254, 44, 85, 0.15);
}

.service-title {
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 0.85rem;
}

.service-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  flex-grow: 1;
  line-height: 1.6;
}

.service-features {
  list-style: none;
  margin-bottom: 1.75rem;
}

.service-features li {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 0.9rem;
  color: var(--text-main);
  margin-bottom: 0.65rem;
  font-weight: 500;
}

.service-features li svg {
  color: var(--success);
  flex-shrink: 0;
}

.service-link {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  color: var(--primary);
  font-weight: 700;
  font-size: 0.95rem;
  text-decoration: none;
  transition: all 0.2s ease;
}

.service-link:hover {
  gap: 0.75rem;
  color: #ff5722;
}

/* TOOL TÍNH PHÍ SÀN (LEAD MAGNET FEATURE) */
.tool-section {
  padding: 5.5rem 0;
  background: var(--bg-card-subtle);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.calc-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  box-shadow: var(--shadow-xl);
  overflow: hidden;
}

.calc-nav-tabs {
  display: flex;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-card-subtle);
}

.calc-tab-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  padding: 1.35rem;
  background: transparent;
  border: none;
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.25s ease;
  border-bottom: 3.5px solid transparent;
}

.calc-tab-btn.active {
  background: var(--bg-card);
  color: var(--primary);
  border-bottom-color: var(--primary);
}

.calc-body {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  padding: 2.75rem;
  gap: 2.75rem;
}

.calc-inputs {
  display: flex;
  flex-direction: column;
  gap: 1.35rem;
}

.input-row-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.15rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.form-label {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-main);
  display: flex;
  justify-content: space-between;
}

.form-label span.note {
  font-weight: 500;
  color: var(--text-muted);
  font-size: 0.8rem;
}

.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.form-control {
  width: 100%;
  padding: 0.85rem 1.15rem;
  border: 1.5px solid var(--border-color);
  border-radius: 12px;
  background: var(--bg-card-subtle);
  color: var(--text-main);
  font-size: 0.95rem;
  font-family: inherit;
  font-weight: 600;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(254, 44, 85, 0.2);
}

.input-suffix {
  position: absolute;
  right: 1.15rem;
  color: var(--text-muted);
  font-size: 0.9rem;
  pointer-events: none;
  font-weight: 700;
}

.calc-presets {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  flex-wrap: wrap;
  margin-top: 0.65rem;
}

.preset-chip {
  padding: 0.45rem 0.95rem;
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-color);
  border-radius: 9999px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.2s ease;
}

.preset-chip:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-light);
  transform: translateY(-1px);
}

/* Result Panel */
.calc-result-panel {
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.result-title {
  font-size: 1.15rem;
  font-weight: 800;
  margin-bottom: 1.35rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.result-rows {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  margin-bottom: 1.75rem;
}

.result-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.92rem;
  color: var(--text-muted);
}

.result-row strong {
  color: var(--text-main);
  font-weight: 800;
}

.result-row.sub-row {
  font-size: 0.82rem;
  padding-left: 0.75rem;
  color: var(--text-light);
}

.divider {
  height: 1px;
  background: var(--border-color);
  margin: 0.5rem 0;
}

.profit-highlight-card {
  background: var(--bg-card);
  border: 2px solid var(--success);
  border-radius: 16px;
  padding: 1.35rem;
  text-align: center;
  margin-bottom: 1.35rem;
  box-shadow: 0 4px 15px rgba(16, 185, 129, 0.15);
}

.profit-title {
  font-size: 0.85rem;
  font-weight: 800;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.5px;
  margin-bottom: 0.25rem;
}

.profit-value {
  font-size: 2rem;
  font-weight: 900;
  color: var(--success);
  line-height: 1.2;
}

.profit-margin-pill {
  display: inline-block;
  margin-top: 0.5rem;
  padding: 0.35rem 0.85rem;
  border-radius: 9999px;
  font-size: 0.85rem;
  font-weight: 800;
  background: rgba(16, 185, 129, 0.15);
  color: var(--success);
}

.profit-margin-pill.warning {
  background: rgba(245, 158, 11, 0.15);
  color: var(--warning);
}

.profit-margin-pill.danger {
  background: rgba(239, 68, 68, 0.15);
  color: var(--danger);
}

/* Why Choose Us */
.why-section {
  padding: 5.5rem 0;
}

.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.compare-card {
  border-radius: 20px;
  padding: 2.5rem;
  border: 1px solid var(--border-color);
}

.compare-card.bad {
  background: var(--bg-card);
  border-left: 5px solid var(--danger);
}

.compare-card.good {
  background: var(--bg-card);
  border-left: 5px solid var(--primary);
  box-shadow: var(--shadow-lg);
  position: relative;
}

.compare-title {
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 1.35rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.compare-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.15rem;
}

.compare-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  font-size: 0.95rem;
  font-weight: 500;
}

.compare-list li svg {
  flex-shrink: 0;
  margin-top: 3px;
}

/* Testimonials / Case Studies */
.cases-section {
  padding: 5.5rem 0;
  background: var(--bg-card-subtle);
  border-top: 1px solid var(--border-color);
}

.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

.case-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 2.25rem;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
  transition: all 0.25s ease;
}

.case-card:hover {
  transform: translateY(-4px);
  border-color: rgba(254, 44, 85, 0.4);
  box-shadow: var(--shadow-xl);
}

.case-badge {
  align-self: flex-start;
  padding: 0.35rem 0.75rem;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 8px;
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  margin-bottom: 1.15rem;
}

.case-quote {
  font-size: 0.95rem;
  color: var(--text-main);
  line-height: 1.65;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.case-metrics {
  display: flex;
  gap: 1rem;
  padding: 1rem;
  background: var(--bg-card-subtle);
  border-radius: 12px;
  margin-bottom: 1.35rem;
}

.metric-item {
  flex: 1;
}

.metric-item .val {
  font-size: 1.25rem;
  font-weight: 900;
  color: var(--success);
}

.metric-item .lbl {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 600;
}

.case-author {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.author-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--primary-gradient);
  color: #fff;
  font-weight: 900;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.05rem;
  box-shadow: 0 4px 10px rgba(254, 44, 85, 0.3);
}

.author-info h4 {
  font-size: 1rem;
  font-weight: 800;
}

.author-info p {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* FAQ Accordion */
.faq-section {
  padding: 5.5rem 0;
}

.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.15rem;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  overflow: hidden;
  transition: all 0.25s ease;
}

.faq-item:hover {
  border-color: rgba(254, 44, 85, 0.3);
}

.faq-question {
  width: 100%;
  padding: 1.35rem 1.65rem;
  background: transparent;
  border: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-align: left;
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--text-main);
  cursor: pointer;
}

.faq-icon {
  transition: transform 0.2s ease;
  flex-shrink: 0;
  color: var(--text-muted);
}

.faq-item.active {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s cubic-bezier(0, 1, 0, 1), padding 0.3s ease;
  padding: 0 1.65rem;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.65;
}

.faq-item.active .faq-answer {
  max-height: 400px;
  padding: 0 1.65rem 1.35rem;
}

/* Lead Generation / Consultation Form */
.cta-section {
  padding: 5.5rem 0;
  background: linear-gradient(135deg, rgba(255, 87, 34, 0.08) 0%, rgba(254, 44, 85, 0.08) 50%, rgba(139, 92, 246, 0.08) 100%);
  border-top: 1px solid var(--border-color);
}

.cta-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  box-shadow: var(--shadow-xl);
  padding: 3.75rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3.75rem;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.cta-box::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--primary-gradient);
}

.cta-info h2 {
  font-size: 2.35rem;
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 1.15rem;
}

.cta-info p {
  font-size: 1.05rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
  line-height: 1.65;
}

.cta-perks {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.95rem;
}

.cta-perks li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.95rem;
  font-weight: 700;
}

.cta-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

/* Footer */
.footer {
  background: var(--bg-card);
  border-top: 1px solid var(--border-color);
  padding: 4.75rem 0 2.25rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3.75rem;
}

.footer-col h4 {
  font-size: 1.05rem;
  font-weight: 800;
  margin-bottom: 1.35rem;
  color: var(--text-main);
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.footer-links a {
  text-decoration: none;
  color: var(--text-muted);
  font-size: 0.92rem;
  font-weight: 500;
  transition: all 0.2s ease;
}

.footer-links a:hover {
  color: var(--primary);
  transform: translateX(3px);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 2.25rem;
  border-top: 1px solid var(--border-color);
  font-size: 0.88rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* Floating Action Contact Widgets */
.floating-actions {
  position: fixed;
  bottom: 24px;
  right: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  z-index: 999;
}

.fab-btn {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  text-decoration: none;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.25);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  position: relative;
}

.fab-btn:hover {
  transform: scale(1.12);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.35);
}

.fab-btn.zalo {
  background: #0068ff;
  box-shadow: 0 6px 18px rgba(0, 104, 255, 0.4);
}

.fab-btn.phone {
  background: linear-gradient(135deg, #ff5722 0%, #fe2c55 100%);
  box-shadow: 0 6px 18px rgba(254, 44, 85, 0.45);
}

.fab-btn.scroll-top {
  background: var(--bg-card);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  display: none;
}

/* Toast Message */
.toast-msg {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  color: #ffffff;
  padding: 0.95rem 1.85rem;
  border-radius: 50px;
  font-weight: 700;
  font-size: 0.95rem;
  box-shadow: 0 10px 25px rgba(16, 185, 129, 0.4);
  opacity: 0;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 9999;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.toast-msg.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* Responsive Breakpoints */
@media (max-width: 1024px) {
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .cases-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .calc-body {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .cta-box {
    grid-template-columns: 1fr;
    padding: 2.75rem;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }
  .mobile-toggle-btn {
    display: block;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem 1rem;
  }
  .stat-item:nth-child(2)::after {
    display: none;
  }
  .services-grid {
    grid-template-columns: 1fr;
  }
  .compare-grid {
    grid-template-columns: 1fr;
  }
  .cases-grid {
    grid-template-columns: 1fr;
  }
  .input-row-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}