/* ============================================================
   SIQUANAO.VN — DESIGN SYSTEM
   "The Authoritative Curator"
   ============================================================ */

/* ---- GOOGLE FONTS IMPORT ---- */
@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:ital,wght@0,400;0,500;0,600;0,700;0,800;1,400;1,700&family=Inter:wght@400;500;600&display=swap');

/* ---- DESIGN TOKENS ---- */
:root {
  /* Colors */
  --primary:                  #001E40;
  --primary-container:        #003366;
  --primary-hover:            #002850;
  --secondary:                #AD2C00;
  --secondary-hover:          #8F2500;
  --secondary-fixed:          #FFDDD0;
  --on-secondary-fixed:       #3A0D00;
  --on-secondary-fixed-var:   #6D1A00;

  --background:               #F8F9FF;
  --surface:                  #F0F4FF;
  --surface-bright:           #FFFFFF;
  --surface-container-lowest: #FFFFFF;
  --surface-container-low:    #EFF4FF;
  --surface-container:        #E5EEFF;
  --surface-container-high:   #D8E4FF;
  --surface-tint:             rgba(0, 51, 102, 0.08);
  --outline-variant:          rgba(0, 30, 64, 0.15);
  --on-surface:               #0B1C30;
  --on-surface-variant:       #4A5875;
  --surface-glass:            rgba(0, 30, 64, 0.80);

  /* Typography */
  --font-editorial:   'Plus Jakarta Sans', system-ui, sans-serif;
  --font-utility:     'Inter', system-ui, sans-serif;

  /* Spacing */
  --space-xs:   4px;
  --space-sm:   8px;
  --space-md:   16px;
  --space-lg:   24px;
  --space-xl:   32px;
  --space-2xl:  48px;
  --space-3xl:  64px;
  --space-4xl:  96px;

  /* Border Radius */
  --radius-sm:  4px;
  --radius-md:  6px;
  --radius-lg:  12px;
  --radius-xl:  20px;
  --radius-full: 999px;

  /* Elevation / Shadows */
  --shadow-ambient: 0 12px 32px rgba(11, 28, 48, 0.06);
  --shadow-card:    0 4px 20px rgba(11, 28, 48, 0.08);
  --shadow-float:   0 20px 60px rgba(11, 28, 48, 0.12);

  /* Transitions */
  --ease-out:  cubic-bezier(0.0, 0.0, 0.2, 1);
  --ease-in:   cubic-bezier(0.4, 0.0, 1, 1);
  --ease-std:  cubic-bezier(0.2, 0.0, 0, 1.2);

  /* Nav */
  --nav-height: 64px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-utility);
  background-color: var(--background);
  color: var(--on-surface);
  line-height: 1.6;
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
}

/* ============================================================
   LAYOUT
   ============================================================ */
.container {
  max-width: 1160px;
  margin-inline: auto;
  padding-inline: var(--space-xl);
}

/* ============================================================
   TYPOGRAPHY SCALE
   ============================================================ */
.section-title {
  font-family: var(--font-editorial);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--on-surface);
  letter-spacing: -0.02em;
}

.section-overline {
  font-family: var(--font-utility);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--primary-container);
  text-transform: uppercase;
  margin-bottom: var(--space-sm);
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-family: var(--font-utility);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  transition: all 0.22s var(--ease-out);
  cursor: pointer;
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--secondary) 0%, var(--secondary-hover) 100%);
  color: #FFFFFF;
  box-shadow: 0 2px 0 var(--on-secondary-fixed-var);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--secondary-hover) 0%, #721E00 100%);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(173, 44, 0, 0.35);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 1px 0 var(--on-secondary-fixed-var);
}

.btn-secondary {
  background: var(--primary);
  color: #FFFFFF;
  padding: 10px 16px;
  font-size: 0.8125rem;
}

.btn-secondary:hover {
  background: var(--primary-container);
  transform: translateY(-1px);
  box-shadow: var(--shadow-card);
}

.btn-sm {
  padding: 8px 14px;
  font-size: 0.8125rem;
  border-radius: var(--radius-md);
}

.btn-full {
  width: 100%;
  justify-content: center;
  padding: 14px 24px;
  font-size: 0.9375rem;
  letter-spacing: 0.06em;
  border-radius: var(--radius-md);
}

.link-tertiary {
  font-family: var(--font-utility);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--primary-container);
  text-decoration: none;
  position: relative;
  transition: color 0.2s;
}

.link-tertiary::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--primary-container);
  transition: width 0.2s var(--ease-out);
}

.link-tertiary:hover::after { width: 100%; }

/* ============================================================
   NAVIGATION
   ============================================================ */
.nav-wrapper {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  background: var(--surface-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  transition: background 0.3s, box-shadow 0.3s;
}

.nav-wrapper.scrolled {
  background: rgba(0, 30, 64, 0.96);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.06);
}

.nav-inner {
  display: flex;
  align-items: center;
  height: 100%;
  gap: var(--space-xl);
}

.nav-logo {
  font-family: var(--font-editorial);
  font-size: 1.1875rem;
  font-weight: 800;
  color: #FFFFFF;
  letter-spacing: -0.01em;
  flex-shrink: 0;
  transition: opacity 0.2s;
}

.nav-logo:hover { opacity: 0.85; }

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
  margin-inline-start: auto;
}

.nav-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.78);
  transition: color 0.2s;
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--secondary);
  border-radius: 99px;
  transition: width 0.22s var(--ease-out);
}

.nav-link:hover { color: #FFFFFF; }
.nav-link:hover::after { width: 100%; }
.nav-link.active { color: #FFFFFF; }
.nav-link.active::after { width: 100%; }

.nav-cta { margin-inline-start: var(--space-md); }

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  margin-inline-start: auto;
  padding: 6px;
}

.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: #ffffff;
  border-radius: 2px;
  transition: all 0.25s;
}

/* ============================================================
   HERO SECTION
   ============================================================ */
.hero-section {
  padding-top: calc(var(--nav-height) + var(--space-2xl));
  padding-bottom: var(--space-4xl);
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-container) 100%);
  position: relative;
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 600px 400px at 60% 120%, rgba(173, 44, 0, 0.12) 0%, transparent 70%),
    radial-gradient(ellipse 400px 300px at 0% -10%, rgba(0, 80, 160, 0.3) 0%, transparent 60%);
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
  position: relative;
}

.hero-image-col {
  position: relative;
}

.hero-img-wrap {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-float);
}

.hero-img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  display: block;
  transition: transform 6s ease;
}

.hero-img-wrap:hover .hero-img {
  transform: scale(1.03);
}

.hero-img-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    transparent 40%,
    rgba(0, 10, 30, 0.35) 100%
  );
}

.hero-content-col {
  color: #FFFFFF;
}

.hero-eyebrow {
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: rgba(255, 255, 255, 0.55);
  text-transform: uppercase;
  margin-bottom: var(--space-md);
}

.hero-headline {
  font-family: var(--font-editorial);
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-xl);
  color: #FFFFFF;
}

.hero-quote {
  color: rgba(255,255,255,0.90);
}

.hero-highlight {
  font-style: italic;
  color: #FF8F6B;
}

.hero-benefit-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.hero-benefit-item {
  display: flex;
  gap: var(--space-md);
  align-items: flex-start;
  padding: var(--space-md) var(--space-lg);
  background: rgba(255, 255, 255, 0.07);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.10);
  backdrop-filter: blur(8px);
  transition: background 0.2s, transform 0.2s;
}

.hero-benefit-item:hover {
  background: rgba(255, 255, 255, 0.12);
  transform: translateX(4px);
}

.benefit-icon {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(173, 44, 0, 0.25);
  border-radius: var(--radius-md);
  color: #FF8F6B;
}

.benefit-title {
  display: block;
  font-family: var(--font-editorial);
  font-size: 0.9375rem;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 3px;
}

.benefit-desc {
  font-size: 0.8125rem;
  line-height: 1.5;
  color: rgba(255, 255, 255, 0.65);
}

.hero-scroll-cue {
  display: flex;
  justify-content: center;
  margin-top: var(--space-3xl);
}

.scroll-dot {
  width: 28px;
  height: 44px;
  border: 2px solid rgba(255, 255, 255, 0.30);
  border-radius: 14px;
  position: relative;
}

.scroll-dot::after {
  content: '';
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 8px;
  background: rgba(255,255,255,0.6);
  border-radius: 2px;
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { transform: translateX(-50%) translateY(0); opacity: 1; }
  50%       { transform: translateX(-50%) translateY(10px); opacity: 0.2; }
}

/* ============================================================
   ECOSYSTEM SECTION
   ============================================================ */
.ecosystem-section {
  background: var(--background);
  padding-block: var(--space-4xl);
  text-align: center;
}

.ecosystem-headline {
  font-family: var(--font-editorial);
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--on-surface);
  margin-bottom: var(--space-md);
  line-height: 1.1;
}

.headline-accent {
  color: var(--secondary);
  font-size: 1.25em;
}

.ecosystem-body {
  max-width: 580px;
  margin-inline: auto;
  margin-bottom: var(--space-3xl);
  color: var(--on-surface-variant);
  font-size: 1rem;
  line-height: 1.7;
}

.solution-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
  text-align: left;
}

.solution-card {
  background: var(--surface-container-lowest);
  border-radius: var(--radius-xl);
  padding: var(--space-xl) var(--space-xl) var(--space-2xl);
  position: relative;
  overflow: hidden;
  transition: transform 0.28s var(--ease-out), box-shadow 0.28s;
  box-shadow: var(--shadow-ambient);
}

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

.solution-card--featured {
  background: var(--surface-container-lowest);
  box-shadow: var(--shadow-card);
  transform: translateY(-8px);
}

.solution-card--featured:hover {
  transform: translateY(-14px);
}

.solution-card-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-lg);
}

.solution-icon-1 {
  background: var(--surface-container-low);
  color: var(--primary-container);
}

.solution-icon-2 {
  background: var(--secondary);
  color: #FFFFFF;
}

.solution-icon-3 {
  background: var(--surface-container-low);
  color: var(--primary-container);
}

.solution-card-title {
  font-family: var(--font-editorial);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--on-surface);
  margin-bottom: var(--space-sm);
  letter-spacing: -0.01em;
}

.solution-card-desc {
  font-size: 0.875rem;
  color: var(--on-surface-variant);
  line-height: 1.65;
}

.solution-card-accent {
  position: absolute;
  bottom: 0;
  left: var(--space-xl);
  width: 32px;
  height: 3px;
  border-radius: 2px;
  background: var(--outline-variant);
  transition: background 0.3s, width 0.3s;
}

.solution-card--featured .solution-card-accent {
  background: var(--secondary);
}

.solution-card:hover .solution-card-accent {
  background: var(--secondary);
  width: 48px;
}

/* ============================================================
   PRODUCTS SECTION
   ============================================================ */
.products-section {
  background: var(--surface-container-low);
  padding-block: var(--space-4xl);
}

.products-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: var(--space-2xl);
}

.section-title::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 1em;
  background: var(--secondary);
  border-radius: 2px;
  margin-right: var(--space-sm);
  vertical-align: middle;
  position: relative;
  top: -1px;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
}

.product-card {
  background: var(--surface-container-lowest);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-ambient);
  transition: transform 0.28s var(--ease-out), box-shadow 0.28s;
}

.product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-float);
}

.product-img-wrap {
  position: relative;
  overflow: hidden;
  aspect-ratio: 3/4;
}

.product-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s var(--ease-out);
}

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

.product-badge {
  position: absolute;
  top: var(--space-sm);
  left: var(--space-sm);
  z-index: 2;
  background: var(--secondary);
  color: #FFFFFF;
  font-family: var(--font-utility);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  box-shadow: 0 2px 8px rgba(173,44,0,0.4);
}

.product-info {
  padding: var(--space-md) var(--space-md) var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.product-name {
  font-family: var(--font-editorial);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--on-surface);
}

/* ============================================================
   VALUES SECTION
   ============================================================ */
.values-section {
  background: var(--background);
  padding-block: var(--space-4xl);
}

.values-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: var(--space-4xl);
  align-items: center;
}

.values-eyebrow {
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--secondary);
  text-transform: uppercase;
  margin-bottom: var(--space-md);
}

.values-headline {
  font-family: var(--font-editorial);
  font-size: clamp(1.5rem, 3vw, 2.125rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  color: var(--on-surface);
  margin-bottom: var(--space-xl);
}

.values-stat {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.values-number {
  font-family: var(--font-editorial);
  font-size: clamp(3rem, 6vw, 4.5rem);
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.04em;
  line-height: 1;
}

.values-plus {
  color: var(--secondary);
}

.values-stat-desc {
  font-size: 0.9375rem;
  color: var(--on-surface-variant);
  line-height: 1.4;
}

.values-body {
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--on-surface-variant);
  max-width: 400px;
}

/* Benefit Float Cards */
.values-cards-col {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.benefit-float-card {
  display: flex;
  gap: var(--space-md);
  align-items: flex-start;
  padding: var(--space-lg) var(--space-xl);
  background: var(--surface-container-low);
  border-radius: var(--radius-xl);
  transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
  position: relative;
  overflow: hidden;
}

.benefit-float-card::before {
  content: '';
  position: absolute;
  right: -20px;
  bottom: -20px;
  width: 80px;
  height: 80px;
  background: var(--surface-tint);
  border-radius: 50%;
  pointer-events: none;
}

.benefit-float-card:hover {
  background: var(--surface-container);
  transform: translateX(4px);
  box-shadow: var(--shadow-card);
}

.benefit-float-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface-tint);
  border-radius: var(--radius-lg);
  color: var(--primary-container);
  position: relative;
  z-index: 1;
}

.benefit-float-title {
  display: block;
  font-family: var(--font-editorial);
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--on-surface);
  margin-bottom: 4px;
}

.benefit-float-desc {
  font-size: 0.8125rem;
  color: var(--on-surface-variant);
  line-height: 1.55;
}

/* ============================================================
   FEEDBACK SECTION (redesigned)
   ============================================================ */
.feedback-section {
  background: var(--surface-container-low);
  padding-block: var(--space-4xl);
}

/* --- Header --- */
.feedback-header {
  text-align: center;
  max-width: 640px;
  margin-inline: auto;
  margin-bottom: var(--space-3xl);
}

.feedback-eyebrow {
  font-family: var(--font-utility);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--secondary);
  text-transform: uppercase;
  margin-bottom: var(--space-sm);
}

.feedback-headline {
  font-family: var(--font-editorial);
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--on-surface);
  line-height: 1.15;
  margin-bottom: var(--space-md);
}

.feedback-accent {
  color: var(--secondary);
}

.feedback-subtext {
  font-size: 1rem;
  color: var(--on-surface-variant);
  line-height: 1.65;
}

/* --- Quote Card --- */
.feedback-quote-wrap {
  max-width: 760px;
  margin-inline: auto;
  margin-bottom: var(--space-3xl);
}

.feedback-quote-card {
  background: var(--primary);
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-container) 100%);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl) var(--space-2xl) var(--space-xl);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-float);
}

.feedback-quote-card::before {
  content: '';
  position: absolute;
  top: -40px;
  right: -40px;
  width: 180px;
  height: 180px;
  background: rgba(255, 255, 255, 0.04);
  border-radius: 50%;
  pointer-events: none;
}

.feedback-quote-icon {
  color: rgba(255, 255, 255, 0.25);
  margin-bottom: var(--space-sm);
}

.feedback-quote-text {
  font-family: var(--font-editorial);
  font-size: clamp(1rem, 1.8vw, 1.125rem);
  font-style: italic;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.92);
  margin-bottom: var(--space-xl);
  position: relative;
  z-index: 1;
}

.feedback-quote-author {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.feedback-author-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
  border: 2px solid rgba(255, 255, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.7);
  flex-shrink: 0;
}

.feedback-author-name {
  display: block;
  font-family: var(--font-editorial);
  font-size: 0.9375rem;
  font-weight: 700;
  color: #FFFFFF;
  font-style: normal;
}

.feedback-author-role {
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.60);
}

.feedback-stars {
  margin-inline-start: auto;
  font-size: 1.25rem;
  color: #FFC947;
  letter-spacing: 2px;
}

/* --- Photo Gallery (3 images mosaic) --- */
.feedback-gallery {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  grid-template-rows: auto;
  gap: var(--space-sm);
  margin-bottom: var(--space-3xl);
  border-radius: var(--radius-xl);
  overflow: hidden;
}

.feedback-gallery-item {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
}

.feedback-gallery-item--large {
  grid-row: 1 / 2;
}

.feedback-img-wrap {
  position: relative;
  overflow: hidden;
  width: 100%;
  height: 100%;
  min-height: 300px;
}

.feedback-gallery-item--large .feedback-img-wrap {
  min-height: 380px;
}

.feedback-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.5s var(--ease-out);
}

.feedback-gallery-item:hover .feedback-img {
  transform: scale(1.06);
}

.feedback-img-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0, 20, 50, 0.75) 0%, transparent 50%);
  display: flex;
  align-items: flex-end;
  padding: var(--space-md) var(--space-lg);
  opacity: 0;
  transition: opacity 0.3s var(--ease-out);
}

.feedback-gallery-item:hover .feedback-img-overlay {
  opacity: 1;
}

.feedback-img-label {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  color: #FFFFFF;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

/* --- Stats Bar --- */
.feedback-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  background: var(--surface-container-lowest);
  border-radius: var(--radius-xl);
  padding: var(--space-xl) var(--space-2xl);
  box-shadow: var(--shadow-ambient);
  margin-bottom: var(--space-3xl);
  flex-wrap: wrap;
}

.feedback-stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
  flex: 1;
  min-width: 120px;
  padding: var(--space-sm) var(--space-lg);
  text-align: center;
}

.feedback-stat-number {
  font-family: var(--font-editorial);
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.04em;
  line-height: 1;
}

.feedback-stat-plus {
  color: var(--secondary);
}

.feedback-stat-label {
  font-size: 0.8125rem;
  color: var(--on-surface-variant);
  font-weight: 500;
  line-height: 1.3;
}

.feedback-stat-divider {
  width: 1px;
  height: 48px;
  background: var(--outline-variant);
  flex-shrink: 0;
}

/* --- Bottom Row: Contact + Form --- */
.feedback-bottom-row {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--space-3xl);
  align-items: start;
}

/* Contact Block */
.feedback-contact-block {
  padding: var(--space-xl) 0;
}

.feedback-contact-title {
  font-family: var(--font-editorial);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--on-surface);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-xl);
}

.feedback-contact-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.feedback-contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
}

.feedback-contact-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-lg);
  background: var(--secondary-fixed);
  color: var(--secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.feedback-contact-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--on-surface-variant);
  margin-bottom: 2px;
}

.feedback-contact-value {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--on-surface);
  line-height: 1.4;
  transition: color 0.2s;
}

a.feedback-contact-value:hover {
  color: var(--secondary);
}

/* ---- REGISTRATION FORM ---- */
.registration-card {
  background: var(--primary);
  background: linear-gradient(160deg, var(--primary) 0%, var(--primary-container) 100%);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  box-shadow: var(--shadow-float);
  position: sticky;
  top: calc(var(--nav-height) + var(--space-lg));
}

.registration-header {
  margin-bottom: var(--space-xl);
}

.registration-title {
  font-family: var(--font-editorial);
  font-size: 1.5rem;
  font-weight: 800;
  color: #FFFFFF;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-sm);
}

.registration-subtitle {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.65);
  line-height: 1.6;
}

.registration-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-label {
  font-size: 0.8125rem;
  font-weight: 500;
  color: rgba(255,255,255,0.70);
  letter-spacing: 0.01em;
}

.form-input {
  background: rgba(255,255,255,0.08);
  border: none;
  border-bottom: 1px solid rgba(255,255,255,0.20);
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  padding: 12px var(--space-sm);
  color: #FFFFFF;
  font-family: var(--font-utility);
  font-size: 0.9375rem;
  outline: none;
  transition: background 0.2s, border-color 0.2s;
  width: 100%;
  appearance: none;
  -webkit-appearance: none;
}

.form-input::placeholder { color: rgba(255,255,255,0.30); }

.form-input:focus {
  background: rgba(255,255,255,0.13);
  border-bottom-color: var(--secondary);
}

.form-input option {
  background: var(--primary);
  color: #FFFFFF;
}

.select-wrap {
  position: relative;
}

.select-arrow {
  position: absolute;
  right: var(--space-sm);
  top: 50%;
  transform: translateY(-50%);
  color: rgba(255,255,255,0.45);
  pointer-events: none;
}

.form-error {
  font-size: 0.75rem;
  color: #FF8F6B;
  min-height: 1em;
  display: block;
}

.form-disclaimer {
  font-size: 0.75rem;
  color: rgba(255,255,255,0.40);
  text-align: center;
  line-height: 1.5;
}

/* Success state */
.form-success {
  text-align: center;
  padding: var(--space-xl) 0;
}

.success-icon {
  width: 72px;
  height: 72px;
  margin-inline: auto;
  margin-bottom: var(--space-lg);
  background: rgba(255,255,255,0.10);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #6DFFB5;
}

.success-title {
  font-family: var(--font-editorial);
  font-size: 1.5rem;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: var(--space-sm);
}

.success-body {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.65);
  line-height: 1.65;
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  background: var(--primary);
  padding-top: var(--space-3xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  padding-bottom: var(--space-3xl);
}

.footer-heading {
  font-family: var(--font-editorial);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.45);
  margin-bottom: var(--space-lg);
}

.footer-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.footer-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  font-size: 0.875rem;
  color: rgba(255,255,255,0.70);
  line-height: 1.5;
}

.footer-item svg {
  flex-shrink: 0;
  margin-top: 2px;
  opacity: 0.6;
}

.social-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 10px var(--space-md);
  background: rgba(255,255,255,0.10);
  border-radius: var(--radius-md);
  color: rgba(255,255,255,0.85);
  font-size: 0.875rem;
  font-weight: 600;
  transition: background 0.2s, color 0.2s;
}

.social-btn:hover {
  background: rgba(255,255,255,0.18);
  color: #FFFFFF;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-block: var(--space-lg);
}

.footer-copy {
  font-size: 0.8125rem;
  color: rgba(255,255,255,0.30);
}

/* ============================================================
   BACK TO TOP
   ============================================================ */
.back-to-top {
  position: fixed;
  bottom: var(--space-xl);
  right: var(--space-xl);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--secondary);
  color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(173,44,0,0.35);
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.3s, transform 0.3s;
  z-index: 50;
}

.back-to-top:not([hidden]) {
  opacity: 1;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--secondary-hover);
  box-shadow: 0 6px 20px rgba(173,44,0,0.45);
}

/* ============================================================
   ZALO FLOATING WIDGET
   ============================================================ */
.zalo-float {
  position: fixed;
  bottom: 100px; /* Above back-to-top */
  right: var(--space-xl);
  z-index: 50;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.zalo-float-btn {
  position: relative;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 20px rgba(0, 104, 255, 0.3);
  transition: transform 0.3s var(--ease-out);
  cursor: pointer;
  text-decoration: none;
}

.zalo-float-btn:hover {
  transform: scale(1.08);
}

.zalo-float-pulse {
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 2px solid #0068FF;
  opacity: 0.5;
  animation: zaloPulse 2s cubic-bezier(0.2, 0, 0, 1) infinite;
  pointer-events: none;
}

@keyframes zaloPulse {
  0% { transform: scale(1); opacity: 0.8; }
  100% { transform: scale(1.6); opacity: 0; }
}

.zalo-float-label {
  font-family: var(--font-utility);
  font-size: 0.75rem;
  font-weight: 700;
  color: currentColor;
  background: #FFFFFF;
  color: #0068FF;
  padding: 4px 12px;
  border-radius: 20px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.zalo-float-tooltip {
  position: absolute;
  right: 70px;
  top: 50%;
  transform: translateY(-50%) translateX(10px);
  background: #FFFFFF;
  padding: 12px 16px;
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.15);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s, transform 0.3s;
  width: max-content;
}

.zalo-float-tooltip::after {
  content: '';
  position: absolute;
  right: -6px;
  top: 50%;
  transform: translateY(-50%);
  border-width: 6px 0 6px 6px;
  border-style: solid;
  border-color: transparent transparent transparent #FFFFFF;
}

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

.zalo-tooltip-title {
  font-weight: 700;
  font-size: 0.9375rem;
  color: #0068FF;
  margin-bottom: 2px;
}

.zalo-tooltip-sub {
  font-size: 0.75rem;
  color: var(--on-surface-variant);
}

/* ============================================================
   POPUP MODAL FORM
   ============================================================ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 30, 64, 0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-md);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

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

.modal-container {
  background: var(--surface-container-lowest);
  width: 100%;
  max-width: 900px;
  border-radius: var(--radius-xl);
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  overflow: hidden;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.3);
  transform: translateY(20px) scale(0.98);
  transition: transform 0.4s cubic-bezier(0.2, 0, 0.2, 1);
}

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

.modal-close {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(0,0,0,0.05);
  color: var(--on-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  transition: background 0.2s, transform 0.2s;
  cursor: pointer;
}

.modal-close:hover {
  background: rgba(0,0,0,0.1);
  transform: rotate(90deg);
}

/* Modal Branding (Left Col) */
.modal-branding {
  background: linear-gradient(145deg, var(--primary) 0%, var(--primary-container) 100%);
  color: #FFFFFF;
  padding: var(--space-2xl);
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.modal-blob {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.05);
  pointer-events: none;
}

.modal-blob-1 {
  width: 300px;
  height: 300px;
  top: -100px;
  right: -100px;
}

.modal-blob-2 {
  width: 200px;
  height: 200px;
  bottom: -50px;
  left: -50px;
}

.modal-brand-logo {
  font-family: var(--font-editorial);
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: var(--space-xl);
  color: #FFFFFF;
}

.modal-brand-tagline {
  font-family: var(--font-editorial);
  font-size: 1.75rem;
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: var(--space-2xl);
}

.modal-brand-stats {
  display: flex;
  gap: var(--space-lg);
  margin-bottom: var(--space-2xl);
}

.modal-stat-num {
  display: block;
  font-family: var(--font-editorial);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--secondary-fixed);
}

.modal-stat-num span {
  color: #FF8F6B;
}

.modal-stat-lbl {
  font-size: 0.75rem;
  color: rgba(255,255,255,0.7);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.modal-brand-badges {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.modal-badge {
  background: rgba(255,255,255,0.1);
  padding: 8px 12px;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

/* Modal Form (Right Col) */
.modal-form-col {
  padding: var(--space-2xl);
  background: var(--surface-container-lowest);
  position: relative;
}

.modal-form-header {
  margin-bottom: var(--space-xl);
}

.modal-eyebrow {
  font-size: 0.6875rem;
  font-weight: 700;
  color: var(--secondary);
  letter-spacing: 0.15em;
  margin-bottom: var(--space-xs);
}

.modal-title {
  font-family: var(--font-editorial);
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--on-surface);
  line-height: 1.2;
  margin-bottom: var(--space-sm);
}

.modal-title-accent {
  color: var(--primary);
}

.modal-subtitle {
  font-size: 0.9375rem;
  color: var(--on-surface-variant);
  line-height: 1.5;
}

.modal-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.modal-form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.modal-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--on-surface);
}

.modal-label svg {
  color: var(--primary);
}

.modal-required {
  color: var(--secondary);
}

.modal-input {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius-md);
  background: var(--background);
  color: var(--on-surface);
  font-family: var(--font-utility);
  font-size: 0.9375rem;
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
}

.modal-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--surface-tint);
}

.modal-select-wrap {
  position: relative;
}

.modal-select {
  appearance: none;
  cursor: pointer;
}

.modal-select-arrow {
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
  color: var(--on-surface-variant);
}

.modal-checkboxes {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.modal-checkbox-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--on-surface-variant);
  cursor: pointer;
}

.modal-checkbox {
  width: 16px;
  height: 16px;
  accent-color: var(--primary);
  cursor: pointer;
}

.modal-error {
  font-size: 0.75rem;
  color: var(--secondary);
  min-height: 14px;
}

.modal-submit-btn {
  background: linear-gradient(135deg, var(--secondary) 0%, var(--secondary-hover) 100%);
  color: #FFFFFF;
  border: none;
  border-radius: var(--radius-md);
  padding: 14px;
  font-family: var(--font-utility);
  font-size: 0.9375rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  margin-top: var(--space-sm);
  box-shadow: 0 4px 12px rgba(173, 44, 0, 0.25);
}

.modal-submit-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(173, 44, 0, 0.35);
}

.modal-disclaimer {
  text-align: center;
  font-size: 0.75rem;
  color: var(--on-surface-variant);
  margin-top: 4px;
}

.modal-success {
  text-align: center;
  padding: var(--space-3xl) var(--space-md);
}

.modal-success-icon {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: rgba(34, 197, 94, 0.1);
  color: #22c55e;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-lg);
}

.modal-success-title {
  font-family: var(--font-editorial);
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--on-surface);
  margin-bottom: var(--space-sm);
}

.modal-success-body {
  font-size: 1rem;
  color: var(--on-surface-variant);
  line-height: 1.6;
  margin-bottom: var(--space-xl);
}

.modal-zalo-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #0068FF;
  color: #FFFFFF;
  padding: 12px 24px;
  border-radius: 99px;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.2s;
}

.modal-zalo-cta:hover {
  background: #0056cc;
}

/* ============================================================
   SCROLL REVEAL ANIMATIONS
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.65s var(--ease-out), transform 0.65s var(--ease-out);
}

.reveal.in-view {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }

/* ============================================================
   RESPONSIVE — TABLET
   ============================================================ */
@media (max-width: 1024px) {
  .container { padding-inline: var(--space-xl); }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }

  .hero-image-col { order: -1; }

  .solution-cards {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .solution-card--featured { transform: none; }
  .solution-card--featured:hover { transform: translateY(-6px); }

  .product-grid { grid-template-columns: repeat(2, 1fr); }

  .values-grid {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }

  /* Feedback section tablet */
  .feedback-gallery {
    grid-template-columns: 1fr 1fr;
  }

  .feedback-gallery-item--large {
    grid-column: 1 / -1;
  }

  .feedback-gallery-item--large .feedback-img-wrap {
    min-height: 280px;
  }

  .feedback-bottom-row {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }

  .registration-card { position: static; }

  .footer-grid { grid-template-columns: 1fr; gap: var(--space-2xl); }

  /* Modal tablet */
  .modal-container {
    grid-template-columns: 1fr;
    max-height: 90vh;
    overflow-y: auto;
  }

  .modal-branding {
    padding: var(--space-xl);
  }

  .modal-form-col {
    padding: var(--space-xl);
  }
}

/* ============================================================
   RESPONSIVE — MOBILE
   ============================================================ */
@media (max-width: 640px) {
  :root { --nav-height: 60px; }

  .container { padding-inline: var(--space-md); }

  .nav-links {
    display: none;
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: rgba(0, 20, 50, 0.97);
    backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: var(--space-md) 0 var(--space-xl);
  }

  .nav-links.open { display: flex; }

  .nav-links li { width: 100%; }

  .nav-link {
    display: block;
    padding: 14px var(--space-xl);
    font-size: 1rem;
    border-bottom: 1px solid rgba(255,255,255,0.05);
  }

  .nav-link::after { display: none; }

  .nav-cta {
    display: none;
  }

  .nav-hamburger {
    display: flex;
  }

  .nav-hamburger.open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  .nav-hamburger.open span:nth-child(2) {
    opacity: 0;
  }
  .nav-hamburger.open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .hero-section {
    padding-top: calc(var(--nav-height) + var(--space-xl));
    padding-bottom: var(--space-3xl);
  }

  .hero-headline { font-size: 1.6rem; }

  .ecosystem-section { padding-block: var(--space-3xl); }
  .ecosystem-headline { font-size: 2rem; }
  .headline-accent { font-size: 1.2em; }

  .products-section { padding-block: var(--space-3xl); }
  .products-header { flex-direction: column; gap: var(--space-sm); }
  .product-grid { grid-template-columns: 1fr 1fr; gap: var(--space-sm); }

  .values-section { padding-block: var(--space-3xl); }
  .values-number { font-size: 3.5rem; }

  /* Feedback section mobile */
  .feedback-section { padding-block: var(--space-3xl); }

  .feedback-gallery {
    grid-template-columns: 1fr;
    gap: var(--space-sm);
  }

  .feedback-gallery-item--large {
    grid-column: 1;
    grid-row: auto;
  }

  .feedback-gallery-item--large .feedback-img-wrap,
  .feedback-img-wrap {
    min-height: 220px;
  }

  .feedback-stats {
    padding: var(--space-md);
  }

  .feedback-stat-divider { display: none; }

  .feedback-stat-item {
    min-width: 80px;
    padding: var(--space-sm);
  }

  .feedback-bottom-row {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }

  .registration-card { padding: var(--space-xl) var(--space-lg); }

  .back-to-top { bottom: var(--space-md); right: var(--space-md); }

  /* Zalo widget mobile */
  .zalo-float {
    bottom: 80px;
    right: var(--space-md);
  }
  
  .zalo-float-btn {
    width: 48px;
    height: 48px;
  }
  
  .zalo-float-tooltip {
    display: none; /* Hide tooltip on mobile to avoid screen overflow */
  }

  /* Modal mobile */
  .modal-container {
    max-height: 95vh;
  }
  
  .modal-branding {
    padding: var(--space-lg);
  }
  
  .modal-brand-logo { font-size: 1.25rem; margin-bottom: var(--space-md); }
  .modal-brand-tagline { font-size: 1.25rem; margin-bottom: var(--space-lg); }
  
  .modal-brand-stats {
    flex-direction: column;
    gap: var(--space-sm);
  }
  
  .modal-form-col {
    padding: var(--space-lg);
  }
  
  .modal-checkboxes {
    grid-template-columns: 1fr;
  }
}