/* ==========================================================================
   NẤM LINH CHI THÀNH ĐỒNG - HIGH-CONVERTING LANDING PAGE STYLES
   Design System: Forest Emerald & Royal Gold with Warm Reishi Burgundy Accents
   ========================================================================== */

/* --- ROOT VARIABLES & DESIGN TOKENS --- */
:root {
  /* Brand Primary Colors */
  --primary-dark: #0a2e24;
  --primary: #124838;
  --primary-light: #1b634e;
  --primary-subtle: #e8f4f0;

  /* Accent Colors (Royal Gold & Burgundy) */
  --gold-dark: #996515;
  --gold: #c59b27;
  --gold-light: #dfb743;
  --gold-subtle: #fbf7ec;
  --gold-gradient: linear-gradient(135deg, #dfb743 0%, #c59b27 50%, #996515 100%);

  --danger: #b91c1c;
  --danger-light: #dc2626;
  --danger-subtle: #fef2f2;
  --danger-gradient: linear-gradient(135deg, #dc2626 0%, #b91c1c 100%);

  --success: #15803d;
  --success-subtle: #f0fdf4;

  /* Neutral Surface & Background Colors */
  --bg-page: #fcfbf8;
  --bg-surface: #ffffff;
  --bg-card: #ffffff;
  --bg-subtle: #f7f5ee;
  --bg-dark: #071f18;

  /* Typography Colors */
  --text-main: #1f2937;
  --text-muted: #4b5563;
  --text-light: #6b7280;
  --text-white: #ffffff;

  /* Borders & Shadows */
  --border-color: #e5e0d3;
  --border-subtle: #f0eee6;
  --border-gold: #e2c87b;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  --shadow-sm: 0 2px 4px rgba(10, 46, 36, 0.05);
  --shadow-md: 0 4px 14px rgba(10, 46, 36, 0.08);
  --shadow-lg: 0 10px 30px rgba(10, 46, 36, 0.12);
  --shadow-xl: 0 20px 40px rgba(10, 46, 36, 0.18);
  --shadow-gold: 0 6px 20px rgba(197, 155, 39, 0.35);
  --shadow-glow: 0 0 25px rgba(220, 38, 38, 0.35);

  /* Typography */
  --font-main: 'Be Vietnam Pro', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-serif: 'Playfair Display', Georgia, serif;
  
  /* Layout */
  --container-max: 1200px;
  --header-height: 76px;
  --promo-height: 40px;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- RESET & GLOBAL STYLES --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-main);
  background-color: var(--bg-page);
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  overflow-x: hidden;
  position: relative;
}

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

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

ul {
  list-style: none;
}

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

button {
  cursor: pointer;
  border: none;
  background: none;
}

/* --- CONTAINER --- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

/* --- SECTION PADDING & HEADERS --- */
.section-padding {
  padding-top: 80px;
  padding-bottom: 80px;
}

.text-center {
  text-align: center;
}

.section-header {
  max-width: 760px;
  margin: 0 auto 50px auto;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  margin-bottom: 16px;
}

.section-tag-primary {
  background: var(--primary-subtle);
  color: var(--primary);
  border: 1px solid rgba(18, 72, 56, 0.2);
}

.section-tag-danger {
  background: var(--danger-subtle);
  color: var(--danger);
  border: 1px solid rgba(220, 38, 38, 0.2);
}

.section-tag-gold {
  background: var(--gold-subtle);
  color: var(--gold-dark);
  border: 1px solid rgba(197, 155, 39, 0.3);
}

.section-title {
  font-size: 2.35rem;
  font-weight: 800;
  line-height: 1.25;
  color: var(--primary-dark);
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1.1rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* --- TEXT HELPERS --- */
.text-primary {
  color: var(--primary);
}

.text-danger {
  color: var(--danger);
}

.text-success {
  color: var(--success);
}

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

/* --- BUTTONS --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-weight: 700;
  border-radius: var(--radius-md);
  padding: 12px 24px;
  transition: all var(--transition-normal);
  text-align: center;
  white-space: nowrap;
}

.btn-primary {
  background: var(--danger-gradient);
  color: var(--text-white);
  box-shadow: 0 4px 15px rgba(220, 38, 38, 0.35);
  border: 1px solid #ef4444;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(220, 38, 38, 0.5);
  filter: brightness(1.05);
}

.btn-gold {
  background: var(--gold-gradient);
  color: #2a1b00;
  font-weight: 800;
  box-shadow: var(--shadow-gold);
  border: 1px solid #f6d87e;
}

.btn-gold:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(197, 155, 39, 0.55);
}

.btn-outline {
  background: transparent;
  color: var(--primary-dark);
  border: 2px solid var(--primary);
}

.btn-outline:hover {
  background: var(--primary);
  color: var(--text-white);
  transform: translateY(-2px);
}

.btn-warning {
  background: #f59e0b;
  color: #1f2937;
  font-weight: 700;
}

.btn-warning:hover {
  background: #d97706;
  color: #ffffff;
}

.btn-block {
  width: 100%;
}

.btn-xl {
  padding: 16px 32px;
  font-size: 1.15rem;
  border-radius: var(--radius-lg);
  flex-direction: column;
  gap: 4px;
}

.btn-xl span {
  font-size: 1.15rem;
  letter-spacing: 0.5px;
}

.btn-xl small {
  font-size: 0.8rem;
  font-weight: 500;
  opacity: 0.9;
}

.btn-glow {
  position: relative;
  overflow: hidden;
}

.btn-glow::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -60%;
  width: 20%;
  height: 200%;
  background: rgba(255, 255, 255, 0.35);
  transform: rotate(30deg);
  animation: shineGlow 3.5s infinite;
}

@keyframes shineGlow {
  0% { left: -60%; }
  25% { left: 140%; }
  100% { left: 140%; }
}

.btn-pulse {
  animation: pulseButton 2.2s infinite;
}

@keyframes pulseButton {
  0%, 100% {
    transform: scale(1);
    box-shadow: 0 4px 15px rgba(220, 38, 38, 0.35);
  }
  50% {
    transform: scale(1.02);
    box-shadow: 0 8px 30px rgba(220, 38, 38, 0.6);
  }
}

/* --- BADGES --- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: var(--radius-full);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.badge-gold {
  background: #fff8e6;
  color: var(--gold-dark);
  border: 1px solid #ebd08c;
}

.badge-green {
  background: #e8f5e9;
  color: var(--primary);
  border: 1px solid #a5d6a7;
}

.badge-gold-solid {
  background: var(--gold-gradient);
  color: #2b1800;
  box-shadow: var(--shadow-sm);
}

/* ==========================================================================
   TOP PROMO BAR & HEADER
   ========================================================================== */
.top-promo-bar {
  background: #111827;
  color: #f3f4f6;
  font-size: 0.84rem;
  padding: 8px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  position: relative;
  z-index: 101;
}

.top-promo-content {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  text-align: center;
  flex-wrap: wrap;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background-color: #ef4444;
  border-radius: 50%;
  box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.7);
  animation: pulseDot 1.5s infinite;
}

@keyframes pulseDot {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.7); }
  70% { transform: scale(1.1); box-shadow: 0 0 0 6px rgba(239, 68, 68, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(239, 68, 68, 0); }
}

.promo-link {
  color: var(--gold-light);
  font-weight: 700;
  text-decoration: underline;
  margin-left: 6px;
}

.promo-link:hover {
  color: #ffffff;
}

/* SITE HEADER */
.site-header {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-subtle);
  z-index: 100;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
}

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

.logo-img {
  height: 48px;
  width: auto;
  object-fit: contain;
}

.nav-menu {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 22px;
}

.nav-link {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-main);
  padding: 6px 2px;
  position: relative;
}

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

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

.nav-link.highlight {
  color: var(--danger);
  font-weight: 700;
}

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

.header-phone {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--primary);
}

.header-phone i {
  font-size: 1.4rem;
  color: var(--gold-dark);
}

.phone-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.phone-label {
  font-size: 0.72rem;
  color: var(--text-light);
  text-transform: uppercase;
}

.phone-text strong {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--primary-dark);
}

.btn-header {
  padding: 10px 20px;
  font-size: 0.9rem;
}

.mobile-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background: var(--bg-subtle);
  padding: 8px;
}

.mobile-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--primary-dark);
  transition: all var(--transition-fast);
}

/* ==========================================================================
   HERO / INTRO SECTION
   ========================================================================== */
.hero-section {
  position: relative;
  padding: 60px 0 80px 0;
  background: radial-gradient(circle at top right, rgba(18, 72, 56, 0.05), transparent 70%),
              linear-gradient(180deg, #fdfcf9 0%, #f6f3eb 100%);
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 40px;
  align-items: center;
}

.trust-badge-group {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.hero-title {
  font-size: 3rem;
  font-weight: 900;
  line-height: 1.15;
  color: var(--primary-dark);
  margin-bottom: 18px;
  letter-spacing: -0.5px;
}

.hero-subtitle {
  font-size: 1.2rem;
  line-height: 1.6;
  color: var(--text-muted);
  margin-bottom: 26px;
}

.hero-subtitle strong {
  color: var(--primary-dark);
}

.hero-highlights {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 30px;
}

.highlight-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.hi-icon {
  color: var(--success);
  font-size: 1.15rem;
  margin-top: 2px;
  flex-shrink: 0;
}

.hi-text {
  font-size: 0.98rem;
  color: var(--text-main);
  line-height: 1.5;
}

.hi-text strong {
  color: var(--primary-dark);
}

/* Hero CTA & Price */
.hero-cta-box {
  background: #ffffff;
  padding: 24px;
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-gold);
  box-shadow: var(--shadow-lg);
  margin-bottom: 30px;
}

.hero-price-wrap {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 16px;
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--border-subtle);
}

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

.price-val {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.current-price {
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--danger);
  line-height: 1;
}

.unit {
  font-size: 1rem;
  color: var(--text-light);
  font-weight: 600;
}

.old-price {
  font-size: 1.15rem;
  color: var(--text-light);
  text-decoration: line-through;
}

.save-tag {
  background: var(--danger-subtle);
  color: var(--danger);
  font-weight: 800;
  font-size: 0.8rem;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(220, 38, 38, 0.2);
}

.price-note {
  width: 100%;
  font-size: 0.82rem;
  color: var(--primary);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 6px;
}

.hero-btn-group {
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  gap: 14px;
}

/* Hero Trust Metrics */
.hero-trust-metrics {
  display: flex;
  align-items: center;
  gap: 20px;
  padding-top: 10px;
}

.metric {
  display: flex;
  flex-direction: column;
}

.metric strong {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--primary-dark);
}

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

.metric-divider {
  width: 1px;
  height: 32px;
  background: var(--border-color);
}

/* Hero Visual Card */
.visual-card {
  position: relative;
  background: #ffffff;
  border-radius: var(--radius-xl);
  padding: 16px;
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--border-subtle);
}

.visual-image-wrapper {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #ffffff;
  aspect-ratio: 1 / 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8px;
  border: 1px solid var(--border-subtle);
}

.main-hero-img {
  width: 100%;
  height: 100%;
  aspect-ratio: 1 / 1;
  object-fit: contain;
  transition: transform 0.6s ease;
  display: block;
}

.visual-card:hover .main-hero-img {
  transform: scale(1.03);
}

.visual-badge-overlay {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  padding: 10px 16px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-gold);
  z-index: 2;
}

.badge-floating-top {
  top: 16px;
  left: 16px;
  animation: floatBadge 4s ease-in-out infinite;
}

.badge-floating-bottom {
  bottom: 16px;
  right: 16px;
  animation: floatBadge 4s ease-in-out infinite 2s;
}

@keyframes floatBadge {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

.badge-icon {
  font-size: 1.6rem;
}

.badge-text strong {
  display: block;
  font-size: 0.88rem;
  font-weight: 800;
  color: var(--primary-dark);
}

.badge-text small {
  font-size: 0.72rem;
  color: var(--text-light);
}

.visual-footer-bar {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--border-subtle);
}

.vfb-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--primary);
}

.vfb-item i {
  color: var(--gold);
  font-size: 1.1rem;
}

/* ==========================================================================
   SECTION 2: VẤN ĐỀ - PAIN POINTS
   ========================================================================== */
.problems-section {
  background: #ffffff;
}

.pain-cards-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 45px;
}

.pain-card {
  position: relative;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 28px 22px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  overflow: hidden;
}

.pain-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--danger-light);
  opacity: 0.7;
  transition: opacity var(--transition-fast);
}

.pain-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(220, 38, 38, 0.3);
}

.pain-card:hover::before {
  opacity: 1;
}

.pain-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: var(--danger-subtle);
  color: var(--danger);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
}

.pain-number {
  position: absolute;
  top: 20px;
  right: 20px;
  font-size: 1.8rem;
  font-weight: 900;
  color: #f1f2f4;
  line-height: 1;
}

.pain-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: 12px;
}

.pain-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.55;
}

/* Market Warning Box */
.market-warning-box {
  background: linear-gradient(135deg, #fffbeb 0%, #fef3c7 100%);
  border: 2px solid #f59e0b;
  border-radius: var(--radius-xl);
  padding: 30px;
  box-shadow: var(--shadow-md);
}

.warning-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
}

.warning-header i {
  font-size: 1.8rem;
  color: #d97706;
}

.warning-header h3 {
  font-size: 1.25rem;
  font-weight: 800;
  color: #92400e;
}

.warning-body {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 30px;
  align-items: center;
}

.warning-text p {
  font-size: 0.98rem;
  color: #78350f;
  margin-bottom: 10px;
  line-height: 1.6;
}

.warning-text p:last-child {
  margin-bottom: 0;
}

.warning-action .btn {
  padding: 14px 24px;
  white-space: nowrap;
}

/* ==========================================================================
   SECTION 3: GIẢI PHÁP - SOLUTION
   ========================================================================== */
.solution-section {
  background: var(--bg-subtle);
}

.solution-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  margin-bottom: 50px;
}

.solution-card {
  background: #ffffff;
  border-radius: var(--radius-lg);
  padding: 30px 22px;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  position: relative;
}

.solution-card.featured {
  background: linear-gradient(180deg, #ffffff 0%, #f5faf8 100%);
  border: 2px solid var(--primary);
  box-shadow: var(--shadow-md);
}

.solution-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}

.sol-badge {
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.5px;
  color: var(--text-light);
  margin-bottom: 14px;
}

.sol-badge.badge-hot {
  color: var(--danger);
}

.sol-icon {
  width: 58px;
  height: 58px;
  border-radius: var(--radius-md);
  background: var(--primary-subtle);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 18px;
}

.solution-card.featured .sol-icon {
  background: var(--primary);
  color: #ffffff;
}

.solution-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: 12px;
}

.solution-card p {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.55;
}

/* Comparison Table Block */
.comparison-block {
  background: #ffffff;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-color);
  overflow: hidden;
}

.comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
}

.comp-col {
  padding: 40px;
}

.comp-market {
  background: #fafafa;
  border-right: 1px solid var(--border-subtle);
}

.comp-thanhdong {
  background: linear-gradient(180deg, #f4faf7 0%, #ffffff 100%);
  border-left: 2px solid var(--primary);
}

.comp-header {
  margin-bottom: 24px;
}

.comp-market .comp-header i {
  color: var(--danger);
  font-size: 2rem;
  margin-bottom: 8px;
}

.comp-thanhdong .comp-header i {
  color: var(--success);
  font-size: 2rem;
  margin-bottom: 8px;
}

.comp-header h3 {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--primary-dark);
  margin-bottom: 4px;
}

.comp-sub {
  font-size: 0.88rem;
  color: var(--text-light);
}

.comp-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.comp-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.95rem;
  line-height: 1.5;
}

.comp-market .comp-list li i {
  color: var(--danger);
  font-size: 1.1rem;
  margin-top: 3px;
  flex-shrink: 0;
}

.comp-thanhdong .comp-list li i {
  color: var(--success);
  font-size: 1.1rem;
  margin-top: 3px;
  flex-shrink: 0;
}

/* ==========================================================================
   SECTION 4: LỢI ÍCH - BENEFITS
   ========================================================================== */
.benefits-section {
  background: #ffffff;
}

.benefits-layout {
  display: flex;
  flex-direction: column;
  gap: 50px;
  margin-bottom: 60px;
}

.benefit-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.benefit-row.reverse {
  direction: rtl;
}

.benefit-row.reverse .benefit-text,
.benefit-row.reverse .benefit-image {
  direction: ltr;
}

.benefit-text {
  position: relative;
  padding: 10px 0;
}

.benefit-index {
  font-size: 2.8rem;
  font-weight: 900;
  color: var(--gold-light);
  line-height: 1;
  margin-bottom: 10px;
}

.benefit-name {
  font-size: 1.7rem;
  font-weight: 800;
  color: var(--primary-dark);
  margin-bottom: 16px;
  line-height: 1.3;
}

.benefit-paragraph {
  font-size: 1.05rem;
  color: var(--text-muted);
  margin-bottom: 20px;
  line-height: 1.6;
}

.benefit-checklist {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 22px;
}

.benefit-checklist div {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-main);
}

.benefit-checklist i {
  color: var(--success);
  font-size: 1.1rem;
}

.benefit-timing {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--gold-subtle);
  border: 1px solid var(--border-gold);
  padding: 10px 18px;
  border-radius: var(--radius-md);
  font-size: 0.88rem;
  color: var(--gold-dark);
  font-weight: 600;
}

.benefit-image {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: 0 10px 28px rgba(18, 72, 56, 0.08);
  border: 1.5px solid var(--border-gold);
  background: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px;
  aspect-ratio: 1 / 1;
  width: 100%;
  max-width: 480px;
  margin: 0 auto;
}

.benefit-img {
  width: 100%;
  height: 100%;
  aspect-ratio: 1 / 1;
  object-fit: contain;
  border-radius: var(--radius-lg);
  transition: transform 0.4s ease;
  display: block;
  background: #ffffff;
}

.benefit-image:hover .benefit-img {
  transform: scale(1.02);
}

/* Compact Cards for Benefits 4 & 5 */
.benefit-compact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 25px;
}

.compact-card {
  background: var(--bg-subtle);
  border-radius: var(--radius-lg);
  padding: 30px;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

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

.cc-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: var(--gold-subtle);
  color: var(--gold-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 18px;
}

.compact-card h3 {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--primary-dark);
  margin-bottom: 10px;
}

.compact-card p {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Inpage CTA Banner */
.inpage-cta-banner {
  background: radial-gradient(circle at top right, rgba(223, 183, 67, 0.25), transparent 70%),
              linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
  color: #ffffff;
  border-radius: var(--radius-xl);
  padding: 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  box-shadow: var(--shadow-xl);
  border: 1px solid rgba(223, 183, 67, 0.4);
}

.cta-banner-content h3 {
  font-size: 1.6rem;
  font-weight: 800;
  margin-bottom: 8px;
  color: #ffffff;
}

.cta-banner-content p {
  font-size: 1.05rem;
  color: rgba(255, 255, 255, 0.85);
}

.cta-banner-btn .btn {
  white-space: nowrap;
}

/* ==========================================================================
   SECTION 5: KHOA HỌC DƯỢC TÍNH & BẰNG CHỨNG KIỂM NGHIỆM
   ========================================================================== */
.evidence-section {
  background: var(--bg-subtle);
}

.evidence-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 25px;
}

.evidence-card {
  background: #ffffff;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  transition: all var(--transition-normal);
}

.evidence-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.ev-img-wrap {
  width: 100%;
  aspect-ratio: 1 / 1;
  max-height: 360px;
  overflow: hidden;
  background: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px;
  border-bottom: 1px solid var(--border-subtle);
}

.ev-img {
  width: 100%;
  height: 100%;
  aspect-ratio: 1 / 1;
  object-fit: contain;
  transition: transform 0.6s ease;
  display: block;
}

.evidence-card:hover .ev-img {
  transform: scale(1.03);
}

.ev-content {
  padding: 24px;
}

.ev-badge {
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.5px;
  color: var(--primary);
  margin-bottom: 8px;
  text-transform: uppercase;
}

.ev-content h3 {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--primary-dark);
  margin-bottom: 10px;
}

.ev-content p {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.55;
}

/* ==========================================================================
   SECTION 6: BẰNG CHỨNG XÃ HỘI (SOCIAL PROOF & REVIEWS)
   ========================================================================== */
.reviews-section {
  background: #ffffff;
}

.certifications-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  background: var(--gold-subtle);
  border: 1px solid var(--border-gold);
  border-radius: var(--radius-xl);
  padding: 30px;
  margin-bottom: 50px;
  text-align: center;
}

.cert-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.cert-icon {
  font-size: 1.6rem;
  color: var(--gold);
  margin-bottom: 4px;
}

.cert-item strong {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--primary-dark);
}

.cert-item span {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* Testimonials */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 25px;
}

.testimonial-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 30px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-normal);
}

.testimonial-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-gold);
}

.testi-stars {
  color: #f59e0b;
  font-size: 1rem;
  margin-bottom: 16px;
  display: flex;
  gap: 4px;
}

.testi-quote {
  font-size: 0.95rem;
  color: var(--text-main);
  line-height: 1.65;
  font-style: italic;
  margin-bottom: 24px;
}

.testi-author {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 16px;
  border-top: 1px solid var(--border-subtle);
}

.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary-subtle);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

.author-info strong {
  display: block;
  font-size: 0.92rem;
  color: var(--primary-dark);
}

.author-info span {
  font-size: 0.78rem;
  color: var(--text-light);
}

/* ==========================================================================
   SECTION 7: BẢNG GIÁ COMBO & FLASH SALE
   ========================================================================== */
.pricing-section {
  background: radial-gradient(circle at center top, rgba(220, 38, 38, 0.04), transparent 60%),
              var(--bg-subtle);
}

.countdown-box {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  background: #ffffff;
  border: 2px solid var(--danger-light);
  border-radius: var(--radius-full);
  padding: 10px 24px;
  box-shadow: var(--shadow-glow);
  margin-top: 20px;
}

.cd-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--danger);
  display: flex;
  align-items: center;
  gap: 8px;
}

.cd-timer {
  display: flex;
  align-items: center;
  gap: 6px;
}

.cd-unit {
  background: var(--danger-gradient);
  color: #ffffff;
  border-radius: var(--radius-sm);
  padding: 4px 10px;
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 42px;
}

.cd-val {
  font-size: 1.25rem;
  font-weight: 900;
  line-height: 1;
}

.cd-lbl {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.cd-colon {
  font-weight: 900;
  color: var(--danger);
  font-size: 1.2rem;
}

/* Pricing Grid */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  align-items: stretch;
  margin-top: 50px;
}

.pricing-card {
  position: relative;
  background: #ffffff;
  border-radius: var(--radius-xl);
  padding: 32px 22px;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-normal);
}

.pricing-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
}

.pricing-card.featured {
  border: 2px solid var(--primary);
  box-shadow: var(--shadow-lg);
  transform: scale(1.03);
  z-index: 2;
}

.pricing-card.featured:hover {
  transform: scale(1.05) translateY(-6px);
}

.featured-ribbon {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.5px;
  padding: 5px 18px;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 10px rgba(18, 72, 56, 0.35);
  white-space: nowrap;
}

.featured-ribbon.ribbon-gold {
  background: var(--gold-gradient);
  color: #2e1e00;
  box-shadow: var(--shadow-gold);
}

.plan-header {
  margin-bottom: 20px;
  text-align: center;
}

.plan-tag {
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  color: var(--text-light);
  letter-spacing: 0.5px;
}

.plan-tag.tag-primary { color: var(--primary); }
.plan-tag.tag-gold { color: var(--gold-dark); }
.plan-tag.tag-danger { color: var(--danger); }

.plan-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--primary-dark);
  margin: 6px 0;
  line-height: 1.3;
}

.plan-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  min-height: 38px;
}

.plan-price {
  text-align: center;
  padding: 16px 0;
  border-top: 1px dashed var(--border-subtle);
  border-bottom: 1px dashed var(--border-subtle);
  margin-bottom: 22px;
}

.plan-price .currency {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--danger);
  vertical-align: super;
}

.plan-price .amount {
  font-size: 2.3rem;
  font-weight: 900;
  color: var(--danger);
  line-height: 1;
}

.plan-price .old {
  display: block;
  font-size: 0.95rem;
  color: var(--text-light);
  margin-top: 4px;
}

.discount-badge {
  display: inline-block;
  background: var(--danger-subtle);
  color: var(--danger);
  font-weight: 800;
  font-size: 0.78rem;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  margin-top: 6px;
}

.plan-features {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 28px;
}

.plan-features li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.88rem;
  line-height: 1.45;
  color: var(--text-main);
}

.plan-features li i {
  color: var(--success);
  font-size: 1rem;
  margin-top: 2px;
  flex-shrink: 0;
}

.plan-features li.disabled {
  color: var(--text-light);
}

.plan-features li.disabled i {
  color: var(--text-light);
}

.plan-features li.gift-highlight {
  background: #fefce8;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid #fde047;
}

.plan-features li.gift-highlight i {
  color: #ca8a04;
}

/* ==========================================================================
   SECTION 8: FORM ĐẶT HÀNG - ORDER SECTION
   ========================================================================== */
.order-section {
  background: #ffffff;
  scroll-margin-top: 80px;
}

.order-box-wrapper {
  background: linear-gradient(180deg, #fcfaf6 0%, #ffffff 100%);
  border-radius: var(--radius-xl);
  border: 2px solid var(--border-gold);
  padding: 45px;
  box-shadow: var(--shadow-xl);
}

.order-header {
  max-width: 650px;
  margin: 0 auto 35px auto;
}

.order-title {
  font-size: 2.1rem;
  font-weight: 800;
  color: var(--primary-dark);
  margin: 12px 0 8px 0;
}

.order-desc {
  font-size: 1rem;
  color: var(--text-muted);
}

.form-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 40px;
}

.form-section-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--primary-dark);
  margin-bottom: 18px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--primary-subtle);
}

/* Combo Radios */
.combo-radio-group {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 24px;
}

.combo-radio-card {
  position: relative;
  display: flex;
  align-items: center;
  background: #ffffff;
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.combo-radio-card:hover {
  border-color: var(--gold);
  background: #fffdfa;
}

.combo-radio-card.active {
  border-color: var(--primary);
  background: var(--primary-subtle);
  box-shadow: 0 4px 12px rgba(18, 72, 56, 0.12);
}

.combo-radio-card input[type="radio"] {
  accent-color: var(--primary);
  width: 18px;
  height: 18px;
  margin-right: 14px;
}

.crc-content {
  flex: 1;
}

.crc-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 4px;
}

.crc-title {
  font-size: 1rem;
  font-weight: 800;
  color: var(--primary-dark);
}

.crc-badge {
  background: var(--danger-gradient);
  color: #ffffff;
  font-size: 0.72rem;
  font-weight: 800;
  padding: 2px 8px;
  border-radius: var(--radius-full);
}

.crc-badge.badge-gold-sm {
  background: var(--gold-gradient);
  color: #2b1800;
}

.crc-badge.badge-red-sm {
  background: var(--danger);
  color: #ffffff;
}

.crc-badge.badge-gray-sm {
  background: #e5e7eb;
  color: #4b5563;
}

.crc-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.crc-price {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--danger);
}

.crc-old {
  font-size: 0.85rem;
  color: var(--text-light);
}

.crc-gift {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--success);
}

.crc-note {
  font-size: 0.8rem;
  color: var(--text-light);
}

/* Preparation Option */
.prep-option-group {
  margin-bottom: 20px;
}

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

.radio-pill-group {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.radio-pill {
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 10px 12px;
  cursor: pointer;
  font-size: 0.84rem;
  font-weight: 600;
  text-align: center;
  background: #ffffff;
  transition: all var(--transition-fast);
}

.radio-pill input {
  display: none;
}

.radio-pill.active {
  border-color: var(--primary);
  background: var(--primary-subtle);
  color: var(--primary-dark);
  font-weight: 700;
}

/* Quantity Control */
.quantity-control-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.quantity-input-box {
  display: flex;
  align-items: center;
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  background: #ffffff;
  overflow: hidden;
}

.qty-btn {
  width: 40px;
  height: 40px;
  background: var(--bg-subtle);
  color: var(--primary-dark);
  font-size: 1.2rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-fast);
}

.qty-btn:hover {
  background: var(--border-color);
}

.quantity-input-box input {
  width: 50px;
  height: 40px;
  border: none;
  text-align: center;
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--primary-dark);
}

/* Order Summary Box */
.order-summary-box {
  background: var(--gold-subtle);
  border: 1.5px dashed var(--border-gold);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

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

.summary-line strong {
  color: var(--primary-dark);
}

.summary-total {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 12px;
  border-top: 1px solid var(--border-gold);
  font-size: 1rem;
  font-weight: 800;
  color: var(--primary-dark);
}

.total-amount {
  font-size: 1.6rem;
  font-weight: 900;
  color: var(--danger);
}

/* Customer Info Fields */
.form-group {
  margin-bottom: 18px;
}

.form-label {
  display: block;
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 6px;
}

.required {
  color: var(--danger);
}

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

.input-with-icon i {
  position: absolute;
  left: 14px;
  color: var(--text-light);
  font-size: 1rem;
  pointer-events: none;
}

.form-control {
  width: 100%;
  padding: 13px 14px 13px 42px;
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  color: var(--text-main);
  background: #ffffff;
  transition: all var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(18, 72, 56, 0.15);
}

textarea.form-control {
  padding-left: 42px;
  resize: vertical;
}

.form-error {
  display: none;
  font-size: 0.8rem;
  color: var(--danger);
  margin-top: 4px;
  font-weight: 600;
}

.form-group.has-error .form-control {
  border-color: var(--danger);
  background: var(--danger-subtle);
}

.form-group.has-error .form-error {
  display: block;
}

/* Trust Commit List */
.trust-commit-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 20px 0;
  padding: 14px;
  background: var(--bg-subtle);
  border-radius: var(--radius-md);
}

.tc-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--primary);
}

.tc-item i {
  color: var(--success);
}

.btn-submit-order {
  padding: 18px 24px;
}

.btn-main-text {
  font-size: 1.25rem;
  font-weight: 900;
  letter-spacing: 0.5px;
}

.btn-sub-text {
  font-size: 0.85rem;
  font-weight: 500;
  opacity: 0.95;
}

/* ==========================================================================
   SECTION 9: HƯỚNG DẪN SỬ DỤNG
   ========================================================================== */
.usage-section {
  background: var(--bg-subtle);
}

.usage-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 25px;
  margin-bottom: 40px;
}

.usage-card {
  background: #ffffff;
  border-radius: var(--radius-xl);
  padding: 35px 25px;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
}

.usage-card.featured {
  border: 2px solid var(--primary);
  box-shadow: var(--shadow-md);
}

.usage-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.usage-step {
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.5px;
  color: var(--text-light);
  margin-bottom: 12px;
}

.usage-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: var(--primary-subtle);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 20px;
}

.usage-card h3 {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--primary-dark);
  margin-bottom: 12px;
}

.usage-card p {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 20px;
  flex: 1;
}

.usage-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-muted);
  background: var(--bg-subtle);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
}

.usage-tag.tag-primary {
  background: var(--primary-subtle);
  color: var(--primary);
}

/* Medical Notice Box */
.medical-notice-box {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  background: #ffffff;
  border: 1.5px solid var(--border-color);
  border-left: 5px solid var(--primary);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}

.mn-icon {
  font-size: 2rem;
  color: var(--primary);
  flex-shrink: 0;
}

.mn-content h4 {
  font-size: 1rem;
  font-weight: 800;
  color: var(--primary-dark);
  margin-bottom: 8px;
}

.mn-content ul {
  list-style: disc;
  padding-left: 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.mn-content li {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ==========================================================================
   SECTION 10: FAQ ACCORDION
   ========================================================================== */
.faq-section {
  background: #ffffff;
}

.faq-accordion-wrapper {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  border: 1.5px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-fast);
}

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

.faq-question {
  width: 100%;
  padding: 20px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #ffffff;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--primary-dark);
  text-align: left;
  transition: background var(--transition-fast);
}

.faq-question:hover {
  background: var(--bg-subtle);
}

.faq-item.active .faq-question {
  background: var(--primary-subtle);
}

.faq-question i {
  font-size: 1rem;
  color: var(--primary);
  transition: transform var(--transition-fast);
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  background: #ffffff;
  padding: 0 24px;
}

.faq-item.active .faq-answer {
  max-height: 400px;
  padding: 20px 24px;
}

.faq-answer p {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.site-footer {
  background: #061e17;
  color: #e2e8f0;
  padding-top: 60px;
  padding-bottom: 40px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1.2fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-logo {
  height: 46px;
  width: auto;
  margin-bottom: 16px;
}

.footer-company-name {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--gold-light);
  margin-bottom: 10px;
  letter-spacing: 0.5px;
}

.footer-slogan {
  font-size: 0.88rem;
  color: #94a3b8;
  line-height: 1.6;
  margin-bottom: 20px;
}

.footer-badges {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.f-badge {
  font-size: 0.72rem;
  font-weight: 800;
  background: rgba(255, 255, 255, 0.1);
  color: #ffffff;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.footer-heading {
  font-size: 1rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 10px;
}

.footer-heading::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 2px;
  background: var(--gold);
}

.footer-contact-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.footer-contact-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.88rem;
  color: #cbd5e1;
  line-height: 1.5;
}

.footer-contact-list li i {
  color: var(--gold-light);
  margin-top: 4px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links li a {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: #cbd5e1;
  transition: color var(--transition-fast);
}

.footer-links li a:hover {
  color: var(--gold-light);
}

.footer-bottom {
  padding-top: 25px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
  font-size: 0.82rem;
  color: #64748b;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-disclaimer {
  font-size: 0.78rem;
  font-style: italic;
  color: #475569;
}

/* ==========================================================================
   MOBILE STICKY BOTTOM BAR (CONVERSION BOOSTER)
   ========================================================================== */
.mobile-sticky-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: 10px 16px;
  box-shadow: 0 -4px 15px rgba(0, 0, 0, 0.12);
  border-top: 1px solid var(--border-color);
  z-index: 99;
  align-items: center;
  justify-content: space-between;
}

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

.msb-label {
  font-size: 0.72rem;
  color: var(--text-light);
  text-transform: uppercase;
  font-weight: 600;
}

.msb-price {
  font-size: 1.15rem;
  font-weight: 900;
  color: var(--danger);
}

.msb-price small {
  font-size: 0.8rem;
  background: var(--danger-subtle);
  padding: 2px 4px;
  border-radius: var(--radius-sm);
}

.btn-msb {
  padding: 12px 24px;
  font-size: 0.95rem;
  font-weight: 800;
  border-radius: var(--radius-md);
}

/* ==========================================================================
   FLOATING QUICK CONTACTS & WIDGETS
   ========================================================================== */
.floating-contact-group {
  position: fixed;
  bottom: 85px;
  right: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  z-index: 98;
}

.float-btn {
  position: relative;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  color: #ffffff;
  box-shadow: var(--shadow-lg);
  transition: all var(--transition-fast);
}

.float-btn:hover {
  transform: scale(1.1);
}

.float-zalo {
  background: #0068ff;
}

.float-phone {
  background: var(--danger-light);
  animation: phoneVibrate 2.5s infinite;
}

@keyframes phoneVibrate {
  0%, 100% { transform: scale(1); }
  10%, 30% { transform: scale(1.1) rotate(5deg); }
  20%, 40% { transform: scale(1.1) rotate(-5deg); }
  50% { transform: scale(1); }
}

.float-back-top {
  background: var(--primary-dark);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-fast), visibility var(--transition-fast);
}

.float-back-top.show {
  opacity: 1;
  visibility: visible;
}

.float-tooltip {
  position: absolute;
  right: 58px;
  background: #1f2937;
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 600;
  white-space: nowrap;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
  opacity: 0;
  pointer-events: none;
  transform: translateX(10px);
  transition: all var(--transition-fast);
}

.float-btn:hover .float-tooltip {
  opacity: 1;
  transform: translateX(0);
}

/* ==========================================================================
   PURCHASE TOAST (FOMO NOTIFICATION)
   ========================================================================== */
.purchase-toast {
  position: fixed;
  bottom: 24px;
  left: 20px;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border-gold);
  border-radius: var(--radius-lg);
  padding: 12px 18px 12px 14px;
  box-shadow: var(--shadow-xl);
  display: flex;
  align-items: center;
  gap: 12px;
  z-index: 97;
  max-width: 340px;
  transform: translateY(120%);
  opacity: 0;
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.purchase-toast.show {
  transform: translateY(0);
  opacity: 1;
}

.toast-avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--primary-subtle);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.toast-content {
  flex: 1;
}

.toast-user {
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--primary-dark);
  line-height: 1.2;
}

.toast-action {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.3;
}

.toast-time {
  display: block;
  font-size: 0.7rem;
  color: var(--success);
  font-weight: 600;
  margin-top: 2px;
}

.toast-close {
  color: var(--text-light);
  font-size: 1.2rem;
  padding: 0 4px;
}

/* ==========================================================================
   ORDER SUCCESS MODAL
   ========================================================================== */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
}

.modal-backdrop.show {
  opacity: 1;
  visibility: visible;
}

.modal-dialog {
  background: #ffffff;
  border-radius: var(--radius-xl);
  max-width: 500px;
  width: 100%;
  padding: 35px 30px;
  text-align: center;
  box-shadow: var(--shadow-xl);
  transform: scale(0.9);
  transition: transform var(--transition-normal);
}

.modal-backdrop.show .modal-dialog {
  transform: scale(1);
}

.modal-success-icon {
  font-size: 3.5rem;
  color: var(--success);
  margin-bottom: 16px;
}

.modal-title {
  font-size: 1.6rem;
  font-weight: 900;
  color: var(--primary-dark);
  margin-bottom: 8px;
}

.modal-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.modal-order-summary {
  background: var(--bg-subtle);
  border-radius: var(--radius-md);
  padding: 18px;
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 20px;
  font-size: 0.9rem;
}

.mos-line {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-note-box {
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
  border-radius: var(--radius-sm);
  padding: 12px;
  font-size: 0.82rem;
  color: #166534;
  margin-bottom: 24px;
  line-height: 1.5;
  text-align: left;
}

/* ==========================================================================
   RESPONSIVE DESIGN & MOBILE OPTIMIZATION
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-title {
    font-size: 2.5rem;
  }

  .pain-cards-grid,
  .solution-grid,
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .pricing-card.featured {
    transform: none;
  }

  .pricing-card.featured:hover {
    transform: translateY(-6px);
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 64px;
  }

  body {
    padding-bottom: 60px; /* Space for sticky mobile bar */
  }

  .section-padding {
    padding-top: 50px;
    padding-bottom: 50px;
  }

  .section-title {
    font-size: 1.85rem;
  }

  /* Nav Menu on Mobile */
  .mobile-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    background: #fdfbf7;
    border: 1.5px solid var(--border-gold);
    border-radius: var(--radius-sm);
    cursor: pointer;
    gap: 4px;
    padding: 0;
    transition: all 0.2s ease;
  }

  .mobile-toggle span {
    display: block;
    width: 20px;
    height: 2.5px;
    background: var(--primary);
    border-radius: 2px;
    transition: transform 0.3s ease, opacity 0.3s ease;
  }

  .mobile-toggle.active span:nth-child(1) {
    transform: translateY(6.5px) rotate(45deg);
  }

  .mobile-toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .mobile-toggle.active span:nth-child(3) {
    transform: translateY(-6.5px) rotate(-45deg);
  }

  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    width: 100%;
    background: #ffffff;
    border-top: 1px solid var(--border-gold);
    border-bottom: 3px solid var(--primary);
    box-shadow: 0 16px 36px rgba(0, 0, 0, 0.16);
    padding: 0;
    max-height: none;
    overflow: visible;
    z-index: 999;
  }

  .nav-menu.open {
    display: block;
    padding: 16px 20px 24px 20px;
    animation: mobileNavDown 0.25s ease-out forwards;
  }

  @keyframes mobileNavDown {
    from {
      opacity: 0;
      transform: translateY(-8px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
  }

  .nav-link {
    display: block;
    padding: 11px 16px;
    font-size: 0.98rem;
    font-weight: 600;
    color: var(--text-main);
    border-radius: var(--radius-sm);
    background: #fbf9f5;
    transition: background 0.2s ease, color 0.2s ease;
  }

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

  .header-phone,
  .btn-header {
    display: none;
  }

  /* Hero Section Mobile */
  .hero-section {
    padding: 24px 0 45px 0;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 25px;
  }

  .hero-title {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1.02rem;
  }

  .hero-btn-group {
    grid-template-columns: 1fr;
  }

  .hero-trust-metrics {
    justify-content: space-around;
  }

  .visual-badge-overlay {
    padding: 6px 12px;
    gap: 8px;
    border-radius: var(--radius-sm);
  }

  .badge-icon {
    font-size: 1.25rem;
  }

  .badge-text strong {
    font-size: 0.8rem;
  }

  .badge-text span {
    font-size: 0.7rem;
  }

  .badge-floating-top {
    top: 8px;
    left: 8px;
  }

  .badge-floating-bottom {
    bottom: 8px;
    right: 8px;
  }

  /* Pain Cards & Solutions */
  .pain-cards-grid,
  .solution-grid {
    grid-template-columns: 1fr;
  }

  .warning-body {
    grid-template-columns: 1fr;
  }

  .comparison-grid {
    grid-template-columns: 1fr;
  }

  .comp-market {
    border-right: none;
    border-bottom: 1px solid var(--border-subtle);
  }

  .comp-thanhdong {
    border-left: none;
    border-top: 2px solid var(--primary);
  }

  /* Benefits Mobile */
  .benefit-row {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .benefit-row.reverse {
    direction: ltr;
  }

  .benefit-image {
    order: -1;
    width: 100%;
    max-width: 100%;
    aspect-ratio: 1 / 1;
    padding: 10px;
    margin: 0 auto 12px auto;
  }

  .benefit-img {
    width: 100%;
    height: 100%;
    max-height: none;
    object-fit: contain;
    display: block;
  }

  .benefit-compact-grid {
    grid-template-columns: 1fr;
  }

  .inpage-cta-banner {
    flex-direction: column;
    text-align: center;
    padding: 30px 20px;
  }

  .inpage-cta-banner .btn {
    width: 100%;
  }

  /* Evidence & Reviews Mobile */
  .evidence-grid,
  .testimonials-grid,
  .usage-grid {
    grid-template-columns: 1fr;
  }

  .ev-img-wrap {
    aspect-ratio: 1 / 1;
    max-height: 320px;
    padding: 10px;
  }

  .ev-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
  }

  .certifications-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    padding: 20px;
  }

  /* Pricing Grid Mobile */
  .pricing-grid {
    grid-template-columns: 1fr;
  }

  .countdown-box {
    flex-direction: column;
    border-radius: var(--radius-lg);
    gap: 10px;
  }

  /* Order Form Mobile */
  .order-box-wrapper {
    padding: 25px 16px;
  }

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

  .radio-pill-group {
    grid-template-columns: 1fr;
  }

  /* Footer Mobile */
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  /* Mobile Sticky Bar Active */
  .mobile-sticky-bar {
    display: flex;
  }

  .floating-contact-group {
    bottom: 80px;
    right: 14px;
  }

  .float-btn {
    width: 44px;
    height: 44px;
    font-size: 1.15rem;
  }

  .purchase-toast {
    left: 12px;
    right: 12px;
    bottom: 75px;
    max-width: none;
  }
}