/* ═══════════════════════════════════════════════════════════
   SEAHOME – LANDING PAGE CSS
   Design: Minimalist Luxury · Dark Ocean Theme
   ═══════════════════════════════════════════════════════════ */

/* ── DESIGN TOKENS ─────────────────────────────────────── */
:root {
  /* Palette */
  --ink:          #0a0e14;
  --ink-soft:     #141b25;
  --surface:      #ffffff;
  --surface-2:    #f4f6f9;
  --surface-3:    #e8ecf2;
  --ocean-deep:   #041c2c;
  --ocean-mid:    #073b5a;
  --ocean-bright: #0e6ea6;
  --ocean-light:  #1a9fd4;
  --accent:       #c8a96e;
  --accent-light: #e2c98a;
  --text-primary: #0a0e14;
  --text-secondary: #4a5568;
  --text-muted:   #8a9ab0;
  --text-invert:  #ffffff;
  --border:       #dde3ec;
  --border-dark:  #1e2d3d;

  /* Typography */
  --font-serif:   'Cormorant Garamond', Georgia, serif;
  --font-sans:    'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Spacing */
  --space-xs:  0.5rem;
  --space-sm:  1rem;
  --space-md:  1.5rem;
  --space-lg:  2.5rem;
  --space-xl:  4rem;
  --space-2xl: 6rem;
  --space-3xl: 8rem;

  /* Layout */
  --max-w:     1200px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;

  /* Transitions */
  --ease:      cubic-bezier(0.4, 0, 0.2, 1);
  --dur-fast:  180ms;
  --dur-med:   320ms;
  --dur-slow:  500ms;

  /* Shadows */
  --shadow-sm:  0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md:  0 4px 16px rgba(0,0,0,.10), 0 2px 6px rgba(0,0,0,.08);
  --shadow-lg:  0 16px 48px rgba(0,0,0,.14), 0 6px 16px rgba(0,0,0,.10);
  --shadow-xl:  0 32px 80px rgba(0,0,0,.20);
}

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

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

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text-primary);
  background: var(--surface);
  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; }
input, select, textarea { font-family: inherit; }

/* ── TYPOGRAPHY ─────────────────────────────────────────── */
h1, h2, h3, h4, h5 {
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.section-label {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--ocean-bright);
  margin-bottom: var(--space-sm);
}

.section-heading {
  font-size: clamp(2rem, 4vw, 3rem);
  color: var(--ink);
  margin-bottom: var(--space-md);
}

.section-heading em {
  font-style: italic;
  color: var(--ocean-bright);
}

.lead-text {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
}

/* ── LAYOUT ─────────────────────────────────────────────── */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.section {
  padding: var(--space-3xl) 0;
}

.section-intro {
  max-width: 640px;
  margin-bottom: var(--space-xl);
}

.section-intro.centered {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

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

/* ── BUTTONS ─────────────────────────────────────────────── */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  background: var(--ocean-bright);
  color: #fff;
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  border-radius: var(--radius-sm);
  transition: background var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease);
}

.btn-primary:hover {
  background: var(--ocean-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(14, 110, 166, 0.35);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  border: 1.5px solid rgba(255,255,255,0.4);
  color: #fff;
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  border-radius: var(--radius-sm);
  backdrop-filter: blur(4px);
  transition: border-color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
}

.btn-ghost:hover {
  border-color: rgba(255,255,255,0.8);
  background: rgba(255,255,255,0.1);
}

.btn-outline-dark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 0.875rem 2rem;
  border: 1.5px solid var(--border);
  color: var(--text-primary);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  border-radius: var(--radius-sm);
  transition: border-color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
}

.btn-outline-dark:hover {
  border-color: var(--ocean-bright);
  color: var(--ocean-bright);
  background: rgba(14, 110, 166, 0.04);
}

.btn-full { width: 100%; justify-content: center; }

/* ── HEADER / NAV ────────────────────────────────────────── */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  transition: background var(--dur-med) var(--ease), box-shadow var(--dur-med) var(--ease);
}

.site-header.scrolled {
  background: rgba(4, 28, 44, 0.97);
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 rgba(255,255,255,0.06);
}

.nav-container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--space-lg);
  height: 72px;
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  flex-shrink: 0;
}

.brand-icon {
  font-size: 1.5rem;
  color: var(--accent);
  line-height: 1;
}

.brand-name {
  font-family: var(--font-serif);
  font-size: 1.375rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.05em;
}

.brand-name em {
  font-style: normal;
  color: var(--accent);
}

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

.nav-item {
  font-size: 0.875rem;
  font-weight: 500;
  color: rgba(255,255,255,0.75);
  letter-spacing: 0.02em;
  transition: color var(--dur-fast) var(--ease);
  position: relative;
}

.nav-item::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0; right: 0;
  height: 1.5px;
  background: var(--accent);
  transform: scaleX(0);
  transition: transform var(--dur-fast) var(--ease);
}

.nav-item:hover { color: #fff; }
.nav-item:hover::after { transform: scaleX(1); }

.nav-cta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1.25rem;
  background: var(--accent);
  color: var(--ink);
  font-size: 0.875rem;
  font-weight: 700;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  transition: background var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
}

.nav-cta:hover {
  background: var(--accent-light);
  transform: translateY(-1px);
}

.cta-dot {
  width: 7px; height: 7px;
  background: var(--ink);
  border-radius: 50%;
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(1.3); }
}

.nav-burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
  margin-left: auto;
}

.nav-burger span {
  display: block;
  width: 24px; height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: transform var(--dur-fast) var(--ease), opacity var(--dur-fast) var(--ease);
}

/* ── HERO ────────────────────────────────────────────────── */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow: hidden;
}

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

.hero-img {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: center;
  filter: saturate(0.7);
}

.hero-veil {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(4, 28, 44, 0.88) 0%,
    rgba(7, 59, 90, 0.72) 50%,
    rgba(4, 28, 44, 0.85) 100%
  );
}

.hero-body {
  position: relative;
  z-index: 1;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 120px var(--space-lg) var(--space-xl);
  width: 100%;
}

.hero-eyebrow {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
}

.eyebrow-line {
  display: block;
  width: 40px; height: 1px;
  background: var(--accent);
  opacity: 0.6;
}

.hero-headline {
  font-size: clamp(3rem, 7vw, 5.5rem);
  font-weight: 300;
  color: #fff;
  line-height: 1.08;
  margin-bottom: var(--space-md);
  max-width: 700px;
}

.hero-headline em {
  font-style: italic;
  color: var(--accent);
  font-weight: 400;
}

.hero-sub {
  font-size: 1.05rem;
  color: rgba(255,255,255,0.75);
  max-width: 560px;
  margin-bottom: var(--space-lg);
  line-height: 1.8;
}

.hero-sub strong { color: var(--accent); }

.hero-actions {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
  margin-bottom: var(--space-xl);
}

.hero-metrics {
  position: relative;
  z-index: 1;
  background: rgba(255,255,255,0.06);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-lg);
  max-width: var(--max-w);
  margin: 0 auto;
  width: calc(100% - var(--space-lg) * 2);
}

.hero-metrics .hero-stats-inner,
.hero-metrics {
  display: flex;
  align-items: center;
  justify-content: space-around;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.metric {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.metric-val {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
}

.metric-unit {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.6);
  margin-left: 2px;
}

.metric-label {
  font-size: 0.75rem;
  color: rgba(255,255,255,0.55);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-top: 4px;
}

.metric-divider {
  width: 1px;
  height: 40px;
  background: rgba(255,255,255,0.15);
}

.hero-scroll {
  position: absolute;
  bottom: var(--space-lg);
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,0.5);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  animation: scroll-bounce 2.5s ease-in-out infinite;
}

.scroll-line {
  display: block;
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, rgba(255,255,255,0.5), transparent);
}

@keyframes scroll-bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* ── ABOUT ───────────────────────────────────────────────── */
.about { background: var(--surface); }

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

.about-visual {
  position: relative;
}

.img-frame {
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.img-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--dur-slow) var(--ease);
}

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

.img-frame--main {
  aspect-ratio: 4/3;
}

.img-frame--accent {
  position: absolute;
  bottom: -var(--space-lg);
  right: -var(--space-md);
  width: 55%;
  aspect-ratio: 4/3;
  border: 4px solid var(--surface);
  box-shadow: var(--shadow-xl);
  bottom: -2rem;
  right: -1.5rem;
}

.about-badge-float {
  position: absolute;
  top: var(--space-md);
  left: -var(--space-md);
  left: -1.5rem;
  background: var(--ocean-deep);
  color: #fff;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  text-align: center;
  box-shadow: var(--shadow-md);
}

.badge-num {
  display: block;
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
}

.badge-stars {
  display: block;
  color: var(--accent);
  font-size: 0.85rem;
  margin: 2px 0;
}

.badge-label {
  font-size: 0.7rem;
  color: rgba(255,255,255,0.6);
  letter-spacing: 0.05em;
}

.about-copy { padding-left: var(--space-md); }

.about-pillars {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin: var(--space-lg) 0;
}

.pillar {
  display: flex;
  gap: var(--space-sm);
  align-items: flex-start;
}

.pillar-icon {
  font-size: 1.1rem;
  color: var(--ocean-bright);
  flex-shrink: 0;
  margin-top: 2px;
}

.pillar strong {
  display: block;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 2px;
}

.pillar span {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* ── SERVICES ────────────────────────────────────────────── */
.services { background: var(--surface-2); }

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.service-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform var(--dur-med) var(--ease), box-shadow var(--dur-med) var(--ease);
}

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

.service-card--dark {
  background: var(--ocean-deep);
  color: #fff;
  grid-column: span 1;
}

.service-img-wrap {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
}

.service-img-wrap img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform var(--dur-slow) var(--ease);
}

.service-card:hover .service-img-wrap img { transform: scale(1.05); }

.service-tag {
  position: absolute;
  top: var(--space-sm);
  left: var(--space-sm);
  background: var(--accent);
  color: var(--ink);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 2px;
}

.service-content {
  padding: var(--space-md) var(--space-lg);
}

.service-content--centered {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  height: 100%;
  padding: var(--space-xl) var(--space-lg);
}

.service-num {
  display: block;
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-weight: 300;
  color: var(--ocean-bright);
  opacity: 0.4;
  line-height: 1;
  margin-bottom: var(--space-xs);
}

.service-card--dark .service-num { color: var(--accent); opacity: 0.5; }

.service-content h3 {
  font-size: 1.2rem;
  margin-bottom: var(--space-xs);
  color: var(--ink);
}

.service-card--dark .service-content h3 { color: #fff; }

.service-content p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-sm);
  line-height: 1.65;
}

.service-card--dark .service-content p { color: rgba(255,255,255,0.7); }

.spec-list {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: var(--space-sm);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.spec-list li::before {
  content: '— ';
  color: var(--ocean-bright);
}

.service-cta {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--ocean-bright);
  transition: gap var(--dur-fast) var(--ease);
}

.service-cta:hover { text-decoration: underline; }

.service-features {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: var(--space-md) 0 var(--space-lg);
  flex: 1;
}

.service-features span {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.8);
}

//* ── TECHNICAL – TEAL / XANH NGỌC NỔI BẬT ───────────────── */
.technical {
  background: linear-gradient(160deg, #022b3a 0%, #04404f 40%, #025e6e 75%, #017a8a 100%);
  position: relative;
  overflow: hidden;
}
.technical::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 40% at 15% 30%, rgba(0,210,200,0.12) 0%, transparent 70%),
    radial-gradient(ellipse 50% 35% at 85% 70%, rgba(0,180,220,0.10) 0%, transparent 70%);
  pointer-events: none;
}
.technical .section-label {
  background: rgba(0,220,210,0.15);
  color: #00dcd2;
  border: 1px solid rgba(0,220,210,0.35);
}
.technical .section-heading {
  color: #ffffff;
}
.technical .section-heading em {
  color: #00dcd2;
}
.technical .section-intro p {
  color: rgba(255,255,255,0.75);
}

.tech-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  position: relative;
  z-index: 1;
}

.tech-block {
  background: rgba(255,255,255,0.06);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  border: 1px solid rgba(0,220,210,0.2);
  backdrop-filter: blur(6px);
  transition: border-color 0.3s, background 0.3s;
}
.tech-block:hover {
  border-color: rgba(0,220,210,0.5);
  background: rgba(255,255,255,0.09);
}

.tech-block--wide {
  grid-column: span 2;
}

.tech-block-title {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: 1.1rem;
  font-family: var(--font-sans);
  font-weight: 700;
  color: #ffffff;
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid rgba(0,220,210,0.25);
}

.tech-icon {
  color: #00dcd2;
  font-size: 1.1rem;
}

.tech-diagram {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: var(--space-md);
  aspect-ratio: 16/9;
}

.tech-diagram img {
  width: 100%; height: 100%;
  object-fit: cover;
}

.diagram-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.diagram-label {
  position: absolute;
  background: rgba(4, 28, 44, 0.85);
  color: var(--accent);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 2px;
  border-left: 2px solid var(--accent);
}

.tech-specs-table {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.spec-row {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: var(--space-sm);
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.875rem;
}

.spec-row:last-child { border-bottom: none; }

.spec-key {
  font-weight: 600;
  color: var(--ink);
}

.spec-val {
  color: var(--text-secondary);
}

/* Water Parameters Grid */
.params-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-sm);
}

.param-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: var(--space-md) var(--space-sm);
  background: var(--surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  text-align: center;
}

.param-gauge {
  position: relative;
  width: 72px; height: 72px;
  border-radius: 50%;
  background: conic-gradient(
    var(--ocean-bright) 0% var(--pct),
    var(--surface-3) var(--pct) 100%
  );
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.param-gauge::before {
  content: '';
  position: absolute;
  inset: 8px;
  background: var(--surface);
  border-radius: 50%;
}

.param-val {
  position: relative;
  z-index: 1;
  font-family: var(--font-serif);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--ink);
  line-height: 1;
}

.param-unit {
  position: relative;
  z-index: 1;
  font-size: 0.6rem;
  color: var(--text-muted);
}

.param-name {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-align: center;
}

/* Materials Grid */
.materials-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: var(--space-lg);
  align-items: start;
}

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

.material-img {
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 4/3;
}

.material-img img {
  width: 100%; height: 100%;
  object-fit: cover;
}

.material-info h4 {
  font-size: 1rem;
  margin-bottom: var(--space-sm);
  color: var(--ink);
}

.material-info--full { width: 100%; }

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}

.data-table th {
  background: var(--ocean-deep);
  color: rgba(255,255,255,0.85);
  font-weight: 600;
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  padding: 10px 12px;
  text-align: left;
}

.data-table td {
  padding: 9px 12px;
  border-bottom: 1px solid var(--border);
  color: var(--text-secondary);
}

.data-table tr:hover td { background: var(--surface-2); }

.tech-note {
  margin-top: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: rgba(14, 110, 166, 0.06);
  border-left: 3px solid var(--ocean-bright);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ── MATERIALS SECTION (10 Premium Materials) ─────────────── */

.materials-pioneer-banner {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  background: linear-gradient(135deg, rgba(14,110,166,0.08) 0%, rgba(0,168,150,0.06) 100%);
  border: 1px solid rgba(14,110,166,0.15);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-lg);
  margin-bottom: var(--space-lg);
}
.pioneer-badge {
  flex-shrink: 0;
  background: var(--accent);
  color: #1a1a2e;
  font-size: 0.65rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  padding: 4px 10px;
  border-radius: 3px;
  margin-top: 2px;
  text-transform: uppercase;
}
.pioneer-text {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--text-secondary);
  margin: 0;
}
.ras-flow-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: var(--space-xl);
}
.ras-flow-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  background: rgba(14,110,166,0.06);
  border: 1px solid rgba(14,110,166,0.15);
  border-radius: var(--radius-sm);
  padding: 10px 18px;
  min-width: 100px;
  transition: all 0.2s;
}
.ras-flow-step.active {
  background: rgba(14,110,166,0.12);
  border-color: var(--ocean-bright);
}
.ras-flow-num {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--ocean-bright);
  line-height: 1;
}
.ras-flow-label {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-align: center;
  letter-spacing: 0.02em;
}
.ras-flow-arrow {
  font-size: 1.2rem;
  color: var(--accent);
  font-weight: 700;
  padding: 0 4px;
  opacity: 0.7;
}
.mat-gallery {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}
.mat-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}
.mat-group-label {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--ink);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid rgba(14,110,166,0.12);
}
.mat-layer-badge {
  background: var(--ocean-deep);
  color: var(--accent);
  font-size: 0.65rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  padding: 3px 9px;
  border-radius: 3px;
  text-transform: uppercase;
  flex-shrink: 0;
}
.mat-layer-badge--bio { background: #0a5c3a; color: #4ade80; }
.mat-layer-badge--chem { background: #5c3a0a; color: #fbbf24; }
.mat-cards-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}
.mat-cards-row--3col { grid-template-columns: 1fr 1fr 1fr; }
.mat-card {
  background: #fff;
  border: 1px solid rgba(14,110,166,0.1);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: transform 0.25s, box-shadow 0.25s;
  display: flex;
  flex-direction: column;
}
.mat-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(14,110,166,0.12);
}
.mat-card-img {
  aspect-ratio: 4/3;
  overflow: hidden;
  background: #f0f4f8;
}
.mat-card-img img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.4s;
}
.mat-card:hover .mat-card-img img { transform: scale(1.04); }
.mat-card-body {
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  flex: 1;
}
.mat-card-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--ocean-deep);
  margin: 0;
  line-height: 1.4;
}
.mat-card-desc {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin: 0;
  flex: 1;
}
.mat-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-top: var(--space-xs);
}
.mat-tag {
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 3px 8px;
  border-radius: 3px;
  background: rgba(14,110,166,0.07);
  color: var(--ocean-deep);
  border: 1px solid rgba(14,110,166,0.12);
  text-transform: uppercase;
}
.materials-stats-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-lg);
  margin-top: var(--space-xl);
  background: linear-gradient(135deg, var(--ocean-deep) 0%, #0a3d5c 100%);
  border-radius: var(--radius-md);
  padding: var(--space-lg) var(--space-xl);
}
.mat-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  text-align: center;
}
.mat-stat-num {
  font-size: 2rem;
  font-weight: 900;
  color: var(--accent);
  line-height: 1;
  letter-spacing: -0.02em;
}
.mat-stat-label {
  font-size: 0.72rem;
  font-weight: 600;
  color: rgba(255,255,255,0.65);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.mat-stat-divider {
  width: 1px;
  height: 40px;
  background: rgba(255,255,255,0.12);
  flex-shrink: 0;
}

/* Dark theme overrides for materials inside .technical section */
.technical .mat-card {
  background: rgba(255,255,255,0.04);
  border-color: rgba(255,255,255,0.08);
}
.technical .mat-card-title { color: rgba(255,255,255,0.9); }
.technical .mat-card-desc { color: rgba(255,255,255,0.6); }
.technical .mat-tag {
  background: rgba(255,255,255,0.06);
  color: rgba(255,255,255,0.75);
  border-color: rgba(255,255,255,0.1);
}
.technical .mat-group-label { color: rgba(255,255,255,0.85); }
.technical .mat-group {
  border-bottom: 1px solid rgba(255,255,255,0.05);
  padding-bottom: var(--space-lg);
}
.technical .mat-group:last-child { border-bottom: none; }
.technical .ras-flow-step {
  background: rgba(255,255,255,0.04);
  border-color: rgba(255,255,255,0.1);
}
.technical .ras-flow-step.active {
  background: rgba(14,110,166,0.25);
  border-color: var(--ocean-bright);
}
.technical .ras-flow-label { color: rgba(255,255,255,0.6); }
.technical .materials-pioneer-banner {
  background: rgba(255,255,255,0.04);
  border-color: rgba(255,255,255,0.1);
}
.technical .pioneer-text { color: rgba(255,255,255,0.65); }

/* Responsive for materials */
@media (max-width: 768px) {
  .mat-cards-row,
  .mat-cards-row--3col { grid-template-columns: 1fr; }
  .ras-flow-step { min-width: 80px; padding: 8px 12px; }
  .ras-flow-arrow { display: none; }
  .materials-pioneer-banner { flex-direction: column; gap: var(--space-sm); }
  .materials-stats-bar { gap: var(--space-md); padding: var(--space-md); }
  .mat-stat-num { font-size: 1.5rem; }
  .mat-stat-divider { display: none; }
}

/* ── PROCESS ─────────────────────────────────────────────── */
.process { background: var(--ocean-deep); }

.process .section-label { color: var(--accent); }
.process .section-heading { color: #fff; }
.process .section-heading em { color: var(--accent); }
.process .section-intro p { color: rgba(255,255,255,0.6); }

.process-timeline {
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: 800px;
  margin: 0 auto;
}

.process-step {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: var(--space-md);
  position: relative;
}

.step-marker {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
}

.step-num {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px; height: 48px;
  border-radius: 50%;
  border: 1.5px solid var(--accent);
  color: var(--accent);
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 700;
  flex-shrink: 0;
  background: rgba(200, 169, 110, 0.08);
}

.step-line {
  flex: 1;
  width: 1px;
  background: rgba(200, 169, 110, 0.2);
  margin: 8px 0;
  min-height: 40px;
}

.step-body {
  padding-bottom: var(--space-xl);
}

.step-body h3 {
  font-size: 1.15rem;
  color: #fff;
  margin-bottom: var(--space-xs);
  padding-top: 10px;
}

.step-body p {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.6);
  line-height: 1.7;
  margin-bottom: var(--space-xs);
}

.step-duration {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent);
  background: rgba(200, 169, 110, 0.12);
  padding: 3px 10px;
  border-radius: 2px;
  letter-spacing: 0.04em;
}

/* ── PROJECTS GALLERY ────────────────────────────────────── */
.projects { background: var(--surface-2); }

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: auto auto;
  gap: var(--space-sm);
}

.gallery-item {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 4/3;
  cursor: pointer;
}

.gallery-item--lg {
  grid-column: span 2;
  grid-row: span 2;
  aspect-ratio: auto;
}

.gallery-item img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform var(--dur-slow) var(--ease), filter var(--dur-slow) var(--ease);
}

.gallery-item:hover img {
  transform: scale(1.06);
  filter: brightness(0.7);
}

.gallery-caption {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: var(--space-md);
  background: linear-gradient(to top, rgba(4,28,44,0.95) 0%, transparent 100%);
  transform: translateY(60%);
  transition: transform var(--dur-med) var(--ease);
}

.gallery-item:hover .gallery-caption { transform: translateY(0); }

.gallery-tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 6px;
}

.gallery-caption h3 {
  font-size: 1rem;
  color: #fff;
  margin-bottom: 4px;
}

.gallery-caption p {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.65);
}

/* ── PRICING ─────────────────────────────────────────────── */
.pricing { background: var(--surface); }

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
  align-items: start;
}

.pricing-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  position: relative;
  transition: box-shadow var(--dur-med) var(--ease), transform var(--dur-med) var(--ease);
}

.pricing-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.pricing-card--featured {
  border-color: var(--ocean-bright);
  box-shadow: 0 0 0 1px var(--ocean-bright), var(--shadow-md);
  transform: translateY(-8px);
}

.pricing-card--featured:hover { transform: translateY(-12px); }

.pricing-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--ocean-bright);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 5px 16px;
  border-radius: 20px;
  white-space: nowrap;
}

.pricing-header { margin-bottom: var(--space-lg); }

.pricing-tier {
  display: block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ocean-bright);
  margin-bottom: var(--space-sm);
}

.pricing-price {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin-bottom: var(--space-xs);
}

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

.price-val {
  font-family: var(--font-serif);
  font-size: 3rem;
  font-weight: 700;
  color: var(--ink);
  line-height: 1;
}

.price-unit {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.pricing-header p {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.pricing-features {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: var(--space-lg);
  font-size: 0.875rem;
}

.pricing-features li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  color: var(--text-secondary);
}

.feat-check { color: var(--ocean-bright); font-weight: 700; flex-shrink: 0; }
.feat-na { opacity: 0.4; }
.feat-na span { color: var(--text-muted); }

/* ── FAQ ─────────────────────────────────────────────────── */
.faq { background: var(--surface-2); }

.faq-grid {
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: 900px;
  margin: 0 auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.faq-item {
  border-bottom: 1px solid var(--border);
}

.faq-item:last-child { border-bottom: none; }

.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-md);
  width: 100%;
  padding: var(--space-md) var(--space-lg);
  background: var(--surface);
  text-align: left;
  transition: background var(--dur-fast) var(--ease);
}

.faq-question:hover { background: var(--surface-2); }

.faq-question[aria-expanded="true"] { background: var(--surface-2); }

.faq-question span:first-child {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.5;
}

.faq-icon {
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--ocean-bright);
  flex-shrink: 0;
  transition: transform var(--dur-fast) var(--ease);
  line-height: 1;
}

.faq-question[aria-expanded="true"] .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  display: none;
  padding: 0 var(--space-lg) var(--space-md);
  background: var(--surface-2);
}

.faq-answer.open { display: block; }

.faq-answer [itemprop="text"] {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

.faq-answer [itemprop="text"] p { margin-bottom: var(--space-sm); }

.faq-answer [itemprop="text"] ul,
.faq-answer [itemprop="text"] ol {
  padding-left: var(--space-md);
  margin-bottom: var(--space-sm);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.faq-answer [itemprop="text"] ul li { list-style: disc; }
.faq-answer [itemprop="text"] ol li { list-style: decimal; }

.faq-answer [itemprop="text"] strong { color: var(--ink); }

.faq-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  margin: var(--space-sm) 0;
}

.faq-table th {
  background: var(--ocean-deep);
  color: rgba(255,255,255,0.85);
  padding: 8px 12px;
  text-align: left;
  font-size: 0.8rem;
}

.faq-table td {
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  color: var(--text-secondary);
}

/* ── TESTIMONIALS ────────────────────────────────────────── */
.testimonials { background: var(--surface); }

.testimonials-track {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.testimonial-card {
  padding: var(--space-lg);
  background: var(--surface-2);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  position: relative;
  transition: box-shadow var(--dur-med) var(--ease);
}

.testimonial-card:hover { box-shadow: var(--shadow-md); }

.review-stars {
  color: var(--accent);
  font-size: 0.9rem;
  margin-bottom: var(--space-sm);
  letter-spacing: 2px;
}

.testimonial-card blockquote {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-style: italic;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-md);
  position: relative;
}

.testimonial-card blockquote::before {
  content: '"';
  font-size: 4rem;
  color: var(--ocean-bright);
  opacity: 0.15;
  position: absolute;
  top: -20px; left: -10px;
  font-family: var(--font-serif);
  line-height: 1;
}

.reviewer {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.reviewer-avatar {
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--ocean-mid);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.875rem;
  flex-shrink: 0;
}

.reviewer strong {
  display: block;
  font-size: 0.9rem;
  color: var(--ink);
}

.reviewer span {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ── CONTACT ─────────────────────────────────────────────── */
.contact { background: var(--surface-2); }

.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--space-xl);
  align-items: start;
}

.contact-info .section-heading { margin-bottom: var(--space-md); }

.contact-info > p {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
}

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

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

.contact-item--link { transition: opacity var(--dur-fast) var(--ease); }
.contact-item--link:hover { opacity: 0.75; }

.ci-icon {
  font-size: 1.1rem;
  color: var(--ocean-bright);
  flex-shrink: 0;
  margin-top: 2px;
}

.contact-item strong {
  display: block;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 2px;
}

.contact-item span, .contact-item a {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.contact-form-wrap {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-md);
}

.contact-form-wrap h3 {
  font-size: 1.4rem;
  margin-bottom: var(--space-lg);
  color: var(--ink);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-sm);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: var(--space-sm);
}

.form-group label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: 0.03em;
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: 0.75rem 1rem;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  color: var(--ink);
  background: var(--surface);
  transition: border-color var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease);
  outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--ocean-bright);
  box-shadow: 0 0 0 3px rgba(14, 110, 166, 0.12);
}

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

.form-note {
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: var(--space-sm);
}

/* ── FOOTER ──────────────────────────────────────────────── */
.site-footer {
  background: var(--ocean-deep);
  color: rgba(255,255,255,0.7);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: var(--space-xl);
  padding: var(--space-3xl) var(--space-lg);
}

.footer-brand .brand { margin-bottom: var(--space-md); }

.footer-brand p {
  font-size: 0.875rem;
  line-height: 1.7;
  margin-bottom: var(--space-md);
}

.footer-social {
  display: flex;
  gap: var(--space-xs);
}

.footer-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px; height: 36px;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: var(--radius-sm);
  font-size: 0.7rem;
  font-weight: 700;
  color: rgba(255,255,255,0.6);
  transition: border-color var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}

.footer-social a:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.footer-col h4 {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.9);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-xs);
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col ul li a,
.footer-col ul li span {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.55);
  transition: color var(--dur-fast) var(--ease);
}

.footer-col ul li a:hover { color: var(--accent); }

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

.footer-bottom-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.footer-bottom p {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.35);
}

.footer-bottom strong { color: rgba(255,255,255,0.6); }

/* ── FLOATING CTA ────────────────────────────────────────── */
.floating-cta {
  position: fixed;
  right: 20px;
  bottom: 24px;
  z-index: 900;
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: flex-end;
}

.float-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 700;
  box-shadow: var(--shadow-lg);
  transition: transform var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease);
  white-space: nowrap;
}

.float-item:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-xl);
}

.float-zalo {
  background: #0068FF;
  color: #fff;
  width: 48px; height: 48px;
  padding: 0;
  justify-content: center;
  border-radius: 50%;
}

.float-quote {
  background: var(--accent);
  color: var(--ink);
}

.float-phone {
  background: var(--ocean-bright);
  color: #fff;
}

/* ── ANIMATIONS ──────────────────────────────────────────── */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--dur-slow) var(--ease), transform var(--dur-slow) var(--ease);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── RESPONSIVE ──────────────────────────────────────────── */
@media (max-width: 1024px) {
  .about-layout,
  .tech-layout,
  .contact-layout { grid-template-columns: 1fr; }

  .tech-block--wide { grid-column: span 1; }
  .materials-grid { grid-template-columns: 1fr; }
  .about-copy { padding-left: 0; }
  .img-frame--accent { display: none; }
  .about-badge-float { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--space-lg); }
}

@media (max-width: 768px) {
  :root {
    --space-xl: 3rem;
    --space-2xl: 4rem;
    --space-3xl: 5rem;
  }

  .nav-links { display: none; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    inset: 72px 0 0;
    background: rgba(4, 28, 44, 0.98);
    backdrop-filter: blur(16px);
    padding: var(--space-xl) var(--space-lg);
    gap: var(--space-md);
    z-index: 999;
  }

  .nav-links.open .nav-item { font-size: 1.2rem; color: #fff; }
  .nav-burger { display: flex; }
  .nav-cta { display: none; }

  .hero-headline { font-size: clamp(2.5rem, 8vw, 4rem); }
  .hero-metrics { flex-wrap: wrap; gap: var(--space-md); }
  .metric-divider { display: none; }

  .services-grid { grid-template-columns: 1fr; }
  .gallery-grid { grid-template-columns: 1fr 1fr; }
  .gallery-item--lg { grid-column: span 2; }
  .pricing-grid { grid-template-columns: 1fr; }
  .pricing-card--featured { transform: none; }
  .testimonials-track { grid-template-columns: 1fr; }
  .params-grid { grid-template-columns: repeat(2, 1fr); }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom-inner { flex-direction: column; text-align: center; }

  .floating-cta { right: 12px; bottom: 16px; }
  .float-quote span, .float-phone span { display: none; }
  .float-quote, .float-phone {
    width: 48px; height: 48px;
    padding: 0;
    justify-content: center;
    border-radius: 50%;
  }
}

@media (max-width: 480px) {
  .container { padding: 0 var(--space-sm); }
  .gallery-grid { grid-template-columns: 1fr; }
  .gallery-item--lg { grid-column: span 1; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn-primary,
  .hero-actions .btn-ghost { width: 100%; justify-content: center; }
}

/* ── PRINT ───────────────────────────────────────────────── */
@media print {
  .site-header, .floating-cta, .hero-scroll { display: none; }
  .hero { min-height: auto; padding: 2rem 0; }
  .hero-media { display: none; }
  .hero-body { color: #000; }
}

/* ═══════════════════════════════════════════════════════════
   TRUNG TÂM TƯ VẤN SEAHOME – ACCORDION SECTION
   ═══════════════════════════════════════════════════════════ */

/* ── ADVISORY SECTION ────────────────────────────────────── */
.advisory {
  background: linear-gradient(180deg, var(--surface) 0%, var(--surface-2) 100%);
  border-top: 1px solid var(--border);
}

/* ── ADVISORY HEADER ─────────────────────────────────────── */
.advisory-header {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--space-xl);
  align-items: start;
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid var(--border);
}

.advisory-title {
  font-size: clamp(2rem, 4vw, 2.8rem);
  margin-bottom: var(--space-sm);
}

.advisory-desc {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.75;
  max-width: 580px;
  margin-bottom: var(--space-md);
}

.advisory-badges {
  display: flex;
  gap: var(--space-xs);
  flex-wrap: wrap;
}

.adv-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 14px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  border: 1.5px solid;
}

.adv-badge--tech {
  background: rgba(14, 110, 166, 0.06);
  border-color: rgba(14, 110, 166, 0.25);
  color: var(--ocean-bright);
}

.adv-badge--profit {
  background: rgba(200, 169, 110, 0.08);
  border-color: rgba(200, 169, 110, 0.3);
  color: #9a7a3a;
}

.adv-badge--service {
  background: rgba(34, 197, 94, 0.06);
  border-color: rgba(34, 197, 94, 0.25);
  color: #16a34a;
}

.advisory-header-right {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  min-width: 200px;
}

.advisory-stat-card {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.asc-num {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 700;
  color: var(--ocean-bright);
  line-height: 1;
  min-width: 56px;
  text-align: center;
}

.asc-label {
  font-size: 0.78rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

.advisory-cta-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-sm) var(--space-md);
  background: var(--ocean-deep);
  border-radius: var(--radius-md);
  color: #fff;
  transition: background var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
}

.advisory-cta-card:hover {
  background: var(--ocean-mid);
  transform: translateY(-2px);
}

.advisory-cta-card span:first-child {
  font-size: 0.85rem;
  line-height: 1.5;
}

.advisory-cta-card strong { color: var(--accent); }

.adv-arrow {
  font-size: 1.25rem;
  color: var(--accent);
  transition: transform var(--dur-fast) var(--ease);
}

.advisory-cta-card:hover .adv-arrow { transform: translateX(4px); }

/* ── ACCORDION GROUP LABEL ───────────────────────────────── */
.accordion-group {
  margin-bottom: var(--space-lg);
}

.accordion-group-label {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) 0 var(--space-sm);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  border-bottom: 2px solid var(--border);
  margin-bottom: var(--space-xs);
}

.agl-icon {
  font-size: 1rem;
  color: var(--ocean-bright);
}

/* ── ACCORDION ITEM ──────────────────────────────────────── */
.accordion-item {
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  transition: background var(--dur-fast) var(--ease);
}

.accordion-item:first-of-type {
  border-top: 1px solid var(--border);
}

.accordion-item.is-open {
  background: #fafcff;
}

/* ── ACCORDION TRIGGER ───────────────────────────────────── */
.accordion-trigger {
  display: grid;
  grid-template-columns: 40px 1fr 32px;
  align-items: center;
  gap: var(--space-sm);
  width: 100%;
  padding: var(--space-md) var(--space-lg);
  background: transparent;
  text-align: left;
  cursor: pointer;
  transition: background var(--dur-fast) var(--ease);
  border: none;
  outline: none;
}

.accordion-trigger:hover {
  background: var(--surface-2);
}

.accordion-trigger:focus-visible {
  outline: 2px solid var(--ocean-bright);
  outline-offset: -2px;
}

.accordion-trigger[aria-expanded="true"] {
  background: rgba(14, 110, 166, 0.04);
}

.acc-q-num {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 300;
  color: var(--ocean-bright);
  opacity: 0.5;
  line-height: 1;
  flex-shrink: 0;
}

.accordion-trigger[aria-expanded="true"] .acc-q-num {
  opacity: 1;
  font-weight: 600;
}

.acc-q-text {
  font-size: 0.975rem;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.5;
  transition: color var(--dur-fast) var(--ease);
}

.accordion-trigger[aria-expanded="true"] .acc-q-text {
  color: var(--ocean-deep);
}

.acc-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1.5px solid var(--border);
  flex-shrink: 0;
  transition: border-color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
  color: var(--ocean-bright);
}

.accordion-trigger:hover .acc-icon {
  border-color: var(--ocean-bright);
  background: rgba(14, 110, 166, 0.06);
}

.accordion-trigger[aria-expanded="true"] .acc-icon {
  border-color: var(--ocean-bright);
  background: var(--ocean-bright);
  color: #fff;
}

.acc-icon svg { width: 16px; height: 16px; }

/* Show/hide plus vs minus */
.acc-plus  { display: block; }
.acc-minus { display: none; }

.accordion-trigger[aria-expanded="true"] .acc-plus  { display: none; }
.accordion-trigger[aria-expanded="true"] .acc-minus { display: block; }

/* ── ACCORDION BODY ──────────────────────────────────────── */
.accordion-body {
  overflow: hidden;
  max-height: 0;
  transition: max-height var(--dur-slow) var(--ease);
}

.accordion-body:not([hidden]) {
  max-height: 2000px;
}

.accordion-body[hidden] {
  display: block !important; /* override HTML hidden for animation */
  max-height: 0;
  visibility: hidden;
}

.accordion-body.acc-animating {
  visibility: visible;
}

.accordion-content {
  padding: var(--space-sm) var(--space-lg) var(--space-lg);
  padding-left: calc(var(--space-lg) + 40px + var(--space-sm));
  border-top: 1px solid var(--border);
}

/* ── ACCORDION CONTENT COMPONENTS ───────────────────────── */

/* Tech Grid (FAQ 1) */
.acc-tech-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-sm);
  margin: var(--space-md) 0;
}

.acc-tech-item {
  display: flex;
  gap: var(--space-sm);
  align-items: flex-start;
  padding: var(--space-sm);
  background: var(--surface-2);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
}

.acc-tech-num {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--ocean-bright);
  opacity: 0.4;
  line-height: 1;
  flex-shrink: 0;
  min-width: 28px;
}

.acc-tech-item strong {
  display: block;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 3px;
}

.acc-tech-item span {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* Highlight Box */
.acc-highlight {
  display: flex;
  gap: var(--space-sm);
  align-items: flex-start;
  padding: var(--space-sm) var(--space-md);
  background: rgba(14, 110, 166, 0.05);
  border-left: 3px solid var(--ocean-bright);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-top: var(--space-md);
}

.acc-highlight--success {
  background: rgba(34, 197, 94, 0.05);
  border-left-color: #16a34a;
}

.acc-highlight--warning {
  background: rgba(245, 158, 11, 0.05);
  border-left-color: #d97706;
}

.acc-hl-icon {
  font-size: 1rem;
  flex-shrink: 0;
  margin-top: 2px;
  color: var(--ocean-bright);
}

.acc-highlight--success .acc-hl-icon { color: #16a34a; }
.acc-highlight--warning .acc-hl-icon { color: #d97706; }

.acc-highlight p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin: 0;
}

/* Table (FAQ 2, 4) */
.acc-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  margin: var(--space-md) 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.acc-table th {
  background: var(--ocean-deep);
  color: rgba(255,255,255,0.9);
  font-weight: 600;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  padding: 10px 14px;
  text-align: left;
}

.acc-table td {
  padding: 9px 14px;
  border-bottom: 1px solid var(--border);
  color: var(--text-secondary);
  background: var(--surface);
}

.acc-table tr:last-child td { border-bottom: none; }
.acc-table tr:hover td { background: var(--surface-2); }

/* Spec Row (FAQ 3) */
.acc-spec-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  margin: var(--space-md) 0;
}

.acc-spec-block {
  padding: var(--space-md);
  background: var(--surface-2);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
}

.acc-spec-block h4 {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: var(--space-sm);
  padding-bottom: var(--space-xs);
  border-bottom: 1px solid var(--border);
}

.acc-spec-block ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.acc-spec-block ul li {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.5;
  padding-left: var(--space-sm);
  border-left: 2px solid var(--ocean-bright);
  opacity: 0.9;
}

.acc-spec-block ul li strong {
  color: var(--ink);
  font-weight: 600;
}

/* Param List (FAQ 5) */
.acc-param-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin: var(--space-md) 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.acc-param {
  display: grid;
  grid-template-columns: 180px 120px 1fr;
  gap: var(--space-sm);
  align-items: center;
  padding: 10px var(--space-md);
  border-bottom: 1px solid var(--border);
  font-size: 0.85rem;
  background: var(--surface);
  transition: background var(--dur-fast) var(--ease);
}

.acc-param:last-child { border-bottom: none; }
.acc-param:hover { background: var(--surface-2); }

.acc-param-name {
  font-weight: 600;
  color: var(--ink);
}

.acc-param-val {
  font-family: var(--font-serif);
  font-weight: 700;
  color: var(--ocean-bright);
  font-size: 0.9rem;
}

.acc-param-ctrl {
  color: var(--text-muted);
  font-size: 0.8rem;
}

/* Pricing Cards (FAQ 6) */
.acc-pricing-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-sm);
  margin: var(--space-md) 0;
}

.acc-price-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: var(--space-md);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  position: relative;
}

.acc-price-card--featured {
  background: var(--ocean-deep);
  border-color: var(--ocean-bright);
  box-shadow: 0 0 0 1px var(--ocean-bright);
}

.acc-price-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  color: var(--ink);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 3px 12px;
  border-radius: 20px;
  white-space: nowrap;
}

.acc-price-tier {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ocean-bright);
  margin-top: 8px;
}

.acc-price-card--featured .acc-price-tier { color: var(--accent); }

.acc-price-val {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--ink);
}

.acc-price-card--featured .acc-price-val { color: #fff; }

.acc-price-card ul {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.acc-price-card ul li {
  font-size: 0.8rem;
  color: var(--text-secondary);
  padding-left: 14px;
  position: relative;
}

.acc-price-card ul li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--ocean-bright);
  font-weight: 700;
}

.acc-price-card--featured ul li { color: rgba(255,255,255,0.75); }
.acc-price-card--featured ul li::before { color: var(--accent); }

/* Timeline (FAQ 7) */
.acc-timeline {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin: var(--space-md) 0;
  position: relative;
  padding-left: 100px;
}

.acc-timeline::before {
  content: '';
  position: absolute;
  left: 72px;
  top: 16px;
  bottom: 16px;
  width: 2px;
  background: linear-gradient(to bottom, var(--ocean-bright), transparent);
}

.acc-tl-item {
  display: flex;
  gap: var(--space-md);
  align-items: flex-start;
  padding: var(--space-sm) 0;
  position: relative;
}

.acc-tl-item::before {
  content: '';
  position: absolute;
  left: -28px;
  top: 18px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--ocean-bright);
  border: 2px solid var(--surface);
  box-shadow: 0 0 0 2px var(--ocean-bright);
}

.acc-tl-day {
  position: absolute;
  left: -100px;
  top: 14px;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--ocean-bright);
  white-space: nowrap;
  letter-spacing: 0.02em;
}

.acc-tl-item strong {
  display: block;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 3px;
}

.acc-tl-item span {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* Warranty Grid (FAQ 8) */
.acc-warranty-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-sm);
  margin: var(--space-md) 0;
}

.acc-warranty-item {
  display: flex;
  gap: var(--space-sm);
  align-items: flex-start;
  padding: var(--space-md);
  background: var(--surface-2);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
}

.acc-w-icon {
  font-size: 1.25rem;
  flex-shrink: 0;
  margin-top: 2px;
}

.acc-warranty-item strong {
  display: block;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 2px;
}

.acc-w-duration {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--ocean-bright);
  background: rgba(14, 110, 166, 0.08);
  padding: 2px 8px;
  border-radius: 3px;
  margin-bottom: 6px;
}

.acc-warranty-item p {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin: 0;
}

/* 3D Steps (FAQ 9) */
.acc-3d-steps {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin: var(--space-md) 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.acc-3d-step {
  display: flex;
  gap: var(--space-md);
  align-items: flex-start;
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  transition: background var(--dur-fast) var(--ease);
}

.acc-3d-step:last-child { border-bottom: none; }
.acc-3d-step:hover { background: var(--surface-2); }

.acc-3d-num {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--ocean-bright);
  color: #fff;
  font-size: 0.78rem;
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 2px;
}

.acc-3d-step strong {
  display: block;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 2px;
}

.acc-3d-step span {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* Emergency Grid (FAQ 10) */
.acc-emergency-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-sm);
  margin: var(--space-md) 0;
}

.acc-emergency-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: var(--space-md);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
}

.acc-emergency-item--fast {
  background: rgba(34, 197, 94, 0.05);
  border-color: rgba(34, 197, 94, 0.25);
}

.acc-emergency-item--medium {
  background: rgba(14, 110, 166, 0.05);
  border-color: rgba(14, 110, 166, 0.2);
}

.acc-emergency-item--outer {
  background: rgba(245, 158, 11, 0.05);
  border-color: rgba(245, 158, 11, 0.2);
}

.acc-em-time {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ocean-bright);
}

.acc-emergency-item--fast .acc-em-time { color: #16a34a; }
.acc-emergency-item--outer .acc-em-time { color: #d97706; }

.acc-emergency-item strong {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--ink);
}

.acc-emergency-item p {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin: 0;
}

/* ── ADVISORY FOOTER ─────────────────────────────────────── */
.advisory-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
  flex-wrap: wrap;
  margin-top: var(--space-xl);
  padding: var(--space-lg) var(--space-xl);
  background: var(--ocean-deep);
  border-radius: var(--radius-lg);
}

.advisory-footer p {
  font-size: 1rem;
  color: rgba(255,255,255,0.75);
  font-family: var(--font-serif);
  font-style: italic;
}

.advisory-footer-actions {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.btn-ghost-dark {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 0.875rem 1.5rem;
  border: 1.5px solid rgba(255,255,255,0.25);
  color: rgba(255,255,255,0.85);
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: border-color var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}

.btn-ghost-dark:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ── RESPONSIVE – ADVISORY ───────────────────────────────── */
@media (max-width: 1024px) {
  .advisory-header {
    grid-template-columns: 1fr;
  }

  .advisory-header-right {
    flex-direction: row;
    flex-wrap: wrap;
    min-width: auto;
  }

  .advisory-stat-card { flex: 1; min-width: 140px; }
  .advisory-cta-card { flex: 1; min-width: 200px; }

  .acc-tech-grid { grid-template-columns: 1fr; }
  .acc-spec-row { grid-template-columns: 1fr; }
  .acc-pricing-cards { grid-template-columns: 1fr; }
  .acc-warranty-grid { grid-template-columns: 1fr; }
  .acc-emergency-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .accordion-trigger {
    grid-template-columns: 32px 1fr 28px;
    padding: var(--space-sm) var(--space-md);
    gap: var(--space-xs);
  }

  .accordion-content {
    padding: var(--space-sm) var(--space-md) var(--space-md);
    padding-left: calc(var(--space-md) + 32px + var(--space-xs));
  }

  .acc-q-num { font-size: 0.9rem; }
  .acc-q-text { font-size: 0.9rem; }

  .acc-param {
    grid-template-columns: 1fr 1fr;
  }

  .acc-param-ctrl { display: none; }

  .acc-timeline {
    padding-left: 80px;
  }

  .advisory-footer {
    flex-direction: column;
    text-align: center;
    padding: var(--space-lg);
  }

  .advisory-footer-actions {
    width: 100%;
    flex-direction: column;
  }

  .advisory-footer-actions .btn-primary,
  .advisory-footer-actions .btn-ghost-dark {
    width: 100%;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .advisory-badges { flex-direction: column; }
  .acc-tech-grid { grid-template-columns: 1fr; }
  .acc-table { font-size: 0.78rem; }
  .acc-table th, .acc-table td { padding: 7px 10px; }
}

/* ═══════════════════════════════════════════════════════════
   RAS 5-TẦNG FLOW DIAGRAM
   ═══════════════════════════════════════════════════════════ */
.ras-flow {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin: 1.5rem 0;
}

.ras-arrow {
  text-align: center;
  color: var(--ocean-bright, #00d4ff);
  font-size: 1.4rem;
  line-height: 1;
  margin: 0.1rem 0;
  opacity: 0.7;
}

.ras-step {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-left: 3px solid rgba(0,212,255,0.4);
  border-radius: 8px;
  padding: 1rem 1.2rem;
  transition: background 0.25s, border-color 0.25s;
}

.ras-step:hover {
  background: rgba(0,212,255,0.06);
  border-left-color: var(--ocean-bright, #00d4ff);
}

.ras-step--highlight {
  border-left-color: var(--gold, #c9a84c);
  background: rgba(201,168,76,0.06);
}

.ras-step--highlight:hover {
  background: rgba(201,168,76,0.1);
}

.ras-step-num {
  flex-shrink: 0;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: var(--ocean-bright, #00d4ff);
  color: var(--deep-ocean, #041c2c);
  font-size: 0.7rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  letter-spacing: 0.03em;
}

.ras-step--highlight .ras-step-num {
  background: var(--gold, #c9a84c);
}

.ras-step-body {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.ras-step-body strong {
  font-size: 0.9rem;
  color: #e8f4f8;
  letter-spacing: 0.02em;
}

.ras-step-body span {
  font-size: 0.82rem;
  color: rgba(232,244,248,0.7);
  line-height: 1.55;
}

/* ═══════════════════════════════════════════════════════════
   TECHNOLOGY COMPARISON TABLE
   ═══════════════════════════════════════════════════════════ */
.tech-block--full {
  grid-column: 1 / -1;
  width: 100%;
}

.tech-sub {
  font-size: 0.9rem;
  color: rgba(232,244,248,0.6);
  margin: -0.5rem 0 1.5rem;
  font-style: italic;
}

.comp-table-wrap {
  width: 100%;
  overflow-x: auto;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.1);
  -webkit-overflow-scrolling: touch;
}

.comp-table {
  width: 100%;
  min-width: 700px;
  border-collapse: collapse;
  font-size: 0.85rem;
}

.comp-table thead tr {
  background: rgba(0,0,0,0.4);
}

.comp-th-criteria {
  padding: 1rem 1.2rem;
  text-align: left;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(232,244,248,0.6);
  width: 22%;
  border-bottom: 2px solid rgba(255,255,255,0.1);
}

.comp-th-old {
  padding: 1rem 1.2rem;
  text-align: left;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #f87171;
  width: 39%;
  border-bottom: 2px solid rgba(248,113,113,0.3);
  background: rgba(248,113,113,0.05);
}

.comp-th-new {
  padding: 1rem 1.2rem;
  text-align: left;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #4ade80;
  width: 39%;
  border-bottom: 2px solid rgba(74,222,128,0.3);
  background: rgba(74,222,128,0.05);
}

.comp-table tbody tr {
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: background 0.2s;
}

.comp-table tbody tr:last-child {
  border-bottom: none;
}

.comp-table tbody tr:hover {
  background: rgba(255,255,255,0.03);
}

.comp-criteria {
  padding: 1rem 1.2rem;
  font-weight: 600;
  font-size: 0.82rem;
  color: #e8f4f8;
  vertical-align: top;
  line-height: 1.5;
}

.comp-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.4rem;
  height: 1.4rem;
  border-radius: 50%;
  background: rgba(0,212,255,0.15);
  color: var(--ocean-bright, #00d4ff);
  font-size: 0.65rem;
  font-weight: 700;
  margin-right: 0.5rem;
  flex-shrink: 0;
  vertical-align: middle;
}

.comp-old {
  padding: 1rem 1.2rem;
  color: rgba(248,113,113,0.85);
  font-size: 0.82rem;
  line-height: 1.6;
  vertical-align: top;
  background: rgba(248,113,113,0.03);
  border-left: 2px solid rgba(248,113,113,0.15);
}

.comp-new {
  padding: 1rem 1.2rem;
  color: rgba(232,244,248,0.9);
  font-size: 0.82rem;
  line-height: 1.6;
  vertical-align: top;
  background: rgba(74,222,128,0.04);
  border-left: 2px solid rgba(74,222,128,0.2);
}

.comp-new strong {
  color: #4ade80;
}

.comp-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  margin-top: 1.5rem;
  padding: 1.2rem 1.5rem;
  background: rgba(0,212,255,0.06);
  border: 1px solid rgba(0,212,255,0.2);
  border-radius: 10px;
  flex-wrap: wrap;
}

.comp-cta-text {
  font-size: 0.9rem;
  color: rgba(232,244,248,0.8);
  flex: 1;
  min-width: 200px;
}

/* ═══════════════════════════════════════════════════════════
   FAQ – STAR ITEMS (Tầng 04 & 05 nổi bật)
   ═══════════════════════════════════════════════════════════ */
.acc-tech-item--star {
  border-left: 2px solid var(--gold, #c9a84c) !important;
  background: rgba(201,168,76,0.06) !important;
}

.acc-tech-item--star .acc-tech-num {
  background: var(--gold, #c9a84c) !important;
  color: #041c2c !important;
}

/* Compare link inside accordion */
.acc-compare-link {
  margin-top: 1rem;
  text-align: right;
}

.acc-link-btn {
  display: inline-block;
  font-size: 0.82rem;
  color: var(--ocean-bright, #00d4ff);
  text-decoration: none;
  border-bottom: 1px solid rgba(0,212,255,0.3);
  padding-bottom: 2px;
  transition: border-color 0.2s, color 0.2s;
}

.acc-link-btn:hover {
  color: #fff;
  border-color: #fff;
}

/* ═══════════════════════════════════════════════════════════
   ALSO UPDATE: About section – "Lọc Sinh Học 3 Tầng" badge
   ═══════════════════════════════════════════════════════════ */
/* No CSS change needed – text is in HTML */

/* ═══════════════════════════════════════════════════════════
   RESPONSIVE – Comparison table on mobile
   ═══════════════════════════════════════════════════════════ */
@media (max-width: 768px) {
  .comp-table {
    min-width: 560px;
  }

  .comp-th-criteria,
  .comp-criteria {
    width: 28%;
  }

  .comp-th-old,
  .comp-old,
  .comp-th-new,
  .comp-new {
    width: 36%;
  }

  .comp-cta {
    flex-direction: column;
    align-items: flex-start;
  }

  .ras-step {
    padding: 0.85rem 1rem;
  }
}

/* ═══════════════════════════════════════════════════════════
   PROJECT FEATURED — GIA VIÊN RESTAURANT
   ═══════════════════════════════════════════════════════════ */
.project-featured {
  position: relative;
  background: var(--ocean-deep);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  margin-bottom: 3rem;
  overflow: hidden;
}

.project-featured::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 70% 50%, rgba(0,180,220,0.08) 0%, transparent 65%);
  pointer-events: none;
}

.project-featured-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--accent, #c8a96e);
  color: #041c2c;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.35rem 0.9rem;
  border-radius: 100px;
  margin-bottom: 1.5rem;
}

.project-featured-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: start;
}

/* ── Gallery side ── */
.project-featured-gallery {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.project-main-img {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 4/3;
}

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

.project-main-img:hover img {
  transform: scale(1.03);
}

.project-sub-imgs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
}

.project-sub-img {
  position: relative;
  border-radius: var(--radius-sm);
  overflow: hidden;
  aspect-ratio: 1/1;
  cursor: pointer;
}

.project-sub-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.4s var(--ease), filter 0.3s;
  filter: brightness(0.85);
}

.project-sub-img:hover img {
  transform: scale(1.08);
  filter: brightness(1);
}

.project-img-label {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(to top, rgba(4,28,44,0.9) 0%, transparent 100%);
  color: rgba(255,255,255,0.9);
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0.6rem 0.5rem 0.4rem;
  text-align: center;
}

/* ── Info side ── */
.project-featured-info {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
  color: var(--text-invert);
}

.project-client-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(0,212,255,0.1);
  border: 1px solid rgba(0,212,255,0.25);
  color: #00d4ff;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 0.4rem 0.9rem;
  border-radius: 100px;
  width: fit-content;
}

.pcb-icon {
  font-size: 0.9rem;
  color: var(--accent, #c8a96e);
}

.project-featured-title {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 600;
  line-height: 1.2;
  color: #fff;
  margin: 0;
}

.project-featured-title em {
  color: var(--accent, #c8a96e);
  font-style: italic;
}

.project-featured-desc {
  font-size: 0.9rem;
  color: rgba(232,244,248,0.75);
  line-height: 1.7;
  margin: 0;
}

.project-specs-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
}

.project-spec {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-md);
  padding: 0.9rem 0.5rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.ps-val {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-weight: 700;
  color: #00d4ff;
  line-height: 1;
}

.ps-val small {
  font-size: 0.9rem;
}

.ps-label {
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: rgba(232,244,248,0.55);
}

.project-highlights {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.project-highlights li {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  font-size: 0.85rem;
  color: rgba(232,244,248,0.85);
  line-height: 1.5;
}

.ph-icon {
  color: #4ade80;
  font-size: 0.75rem;
  flex-shrink: 0;
  margin-top: 0.2rem;
}

.project-cta {
  align-self: flex-start;
  margin-top: 0.5rem;
}

/* Secondary gallery below featured */
.gallery-grid--secondary {
  grid-template-columns: repeat(4, 1fr);
  margin-top: 0;
}

/* ═══════════════════════════════════════════════════════════
   RESPONSIVE — Project Featured
   ═══════════════════════════════════════════════════════════ */
@media (max-width: 1024px) {
  .project-featured-inner {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .project-specs-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (max-width: 768px) {
  .project-featured {
    padding: 1.5rem;
  }

  .project-featured-title {
    font-size: 1.6rem;
  }

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

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

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

@media (max-width: 480px) {
  .project-specs-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .gallery-grid--secondary {
    grid-template-columns: 1fr;
  }
}

/* ═══════════════════════════════════════════════════════════
   PROJECT FEATURED ALT — BÃI CHÁY (layout đảo chiều)
   ═══════════════════════════════════════════════════════════ */
.project-featured--alt {
  background: linear-gradient(135deg, rgba(0,30,60,0.95) 0%, rgba(0,60,100,0.9) 100%);
  border-color: rgba(0,180,255,0.2);
  margin-top: 2rem;
}

.project-featured-badge--blue {
  background: #0099cc;
  color: #fff;
}

/* Đảo chiều: info bên trái, gallery bên phải */
.project-featured-inner--reverse {
  direction: ltr;
}

/* 5 ảnh nhỏ dàn đều */
.project-sub-imgs--5 {
  grid-template-columns: repeat(5, 1fr);
}

@media (max-width: 768px) {
  .project-sub-imgs--5 {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 480px) {
  .project-sub-imgs--5 {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Gallery 4 cột cho Bãi Cháy (8 ảnh) */
.project-sub-imgs--4 {
  grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 900px) {
  .project-sub-imgs--4 {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 600px) {
  .project-sub-imgs--4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ═══════════════════════════════════════════════════════════
   PROJECT FEATURED PHÚ TÂM — badge vàng gold, layout chuẩn
   ═══════════════════════════════════════════════════════════ */
.project-featured--phutam {
  background: linear-gradient(135deg, rgba(20,15,5,0.97) 0%, rgba(50,35,5,0.93) 100%);
  border-color: rgba(212,175,55,0.25);
  margin-top: 2rem;
}

.project-featured-badge--gold {
  background: linear-gradient(90deg, #d4af37, #f5d060, #d4af37);
  color: #1a1200;
  font-weight: 700;
}

/* ============================================================
   DU AN GIA VIEN HAI PHONG - Card layout dao chieu (info trai, media phai)
   ============================================================ */
.project-featured--giavien-hp {
  flex-direction: row;
  background: linear-gradient(135deg, #0a0f1a 0%, #0d1520 60%, #0a1028 100%);
  border: 1px solid rgba(180, 30, 30, 0.25);
  position: relative;
  overflow: hidden;
}
.project-featured--giavien-hp::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, #b91c1c, #dc2626, #ef4444, #dc2626, #b91c1c);
}
.project-featured--giavien-hp .project-featured-media { order: 2; }
.project-featured--giavien-hp .project-featured-info  { order: 1; }

.project-badge--premium {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 1rem;
  border-radius: 2rem;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: linear-gradient(135deg, #7f1d1d, #b91c1c, #dc2626);
  color: #fff;
  border: 1px solid rgba(239,68,68,0.4);
  box-shadow: 0 0 16px rgba(185,28,28,0.35);
  margin-bottom: 0.75rem;
}

.project-sub-imgs--7col {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  margin-top: 6px;
}
.project-sub-imgs--7col figure {
  position: relative;
  overflow: hidden;
  border-radius: 4px;
  aspect-ratio: 4/3;
  cursor: pointer;
}
.project-sub-imgs--7col figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.project-sub-imgs--7col figure:hover img { transform: scale(1.07); }
.project-sub-imgs--7col figcaption {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 0.3rem 0.5rem;
  font-size: 0.6rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: #fff;
  background: linear-gradient(transparent, rgba(0,0,0,0.75));
  text-align: center;
}

@media (max-width: 900px) {
  .project-featured--giavien-hp { flex-direction: column; }
  .project-featured--giavien-hp .project-featured-media { order: 1; }
  .project-featured--giavien-hp .project-featured-info  { order: 2; }
  .project-sub-imgs--7col { grid-template-columns: repeat(3, 1fr); }
}

/* ============================================================
   DU AN TAY BAC WINE CELLAR BMT - Card layout thuan chieu
   ============================================================ */
.project-featured--taybac {
  flex-direction: row;
  background: linear-gradient(135deg, #0a0e14 0%, #0d1520 60%, #0a0e14 100%);
  border: 1px solid rgba(200, 169, 110, 0.2);
  position: relative;
  overflow: hidden;
}
.project-featured--taybac::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, #7c5c1e, #c8a96e, #e2c98a, #c8a96e, #7c5c1e);
}

.project-badge--luxury {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 1rem;
  border-radius: 2rem;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: linear-gradient(135deg, #7c5c1e, #c8a96e, #e2c98a);
  color: #0a0e14;
  border: 1px solid rgba(200,169,110,0.5);
  box-shadow: 0 0 16px rgba(200,169,110,0.3);
  margin-bottom: 0.75rem;
}

/* Grid 10 anh phu cho Tay Bac - 5 cot x 2 hang */
.project-sub-imgs--taybac {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 5px;
  margin-top: 6px;
}
.project-sub-imgs--taybac figure {
  position: relative;
  overflow: hidden;
  border-radius: 4px;
  aspect-ratio: 4/3;
  cursor: pointer;
}
.project-sub-imgs--taybac figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.project-sub-imgs--taybac figure:hover img { transform: scale(1.07); }
.project-sub-imgs--taybac figcaption {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 0.25rem 0.4rem;
  font-size: 0.55rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: #fff;
  background: linear-gradient(transparent, rgba(0,0,0,0.75));
  text-align: center;
}

@media (max-width: 900px) {
  .project-featured--taybac { flex-direction: column; }
  .project-sub-imgs--taybac { grid-template-columns: repeat(3, 1fr); }
}

/* ============================================================
   TECHNICAL SECTION – TEAL OVERRIDE (text/table màu sáng)
   ============================================================ */
.technical .spec-row {
  border-bottom-color: rgba(0,220,210,0.15);
}
.technical .spec-key {
  color: #ffffff;
  font-weight: 600;
}
.technical .spec-val {
  color: rgba(220,245,245,0.85);
}
.technical .spec-row:last-child { border-bottom: none; }

.technical .param-card {
  background: rgba(255,255,255,0.07);
  border-color: rgba(0,220,210,0.2);
}
.technical .param-gauge {
  background: conic-gradient(#00dcd2 0% var(--pct), rgba(255,255,255,0.1) var(--pct) 100%);
}
.technical .param-gauge::before {
  background: #02404f;
}
.technical .param-val { color: #ffffff; }
.technical .param-unit { color: rgba(255,255,255,0.55); }
.technical .param-name { color: rgba(220,245,245,0.8); }

.technical .material-info h4 { color: #ffffff; }

.technical .data-table th {
  background: rgba(0,100,120,0.6);
  color: #ffffff;
}
.technical .data-table td {
  color: rgba(220,245,245,0.85);
  border-bottom-color: rgba(0,220,210,0.12);
}
.technical .data-table tr:hover td {
  background: rgba(0,220,210,0.06);
}

.technical .tech-note {
  background: rgba(0,220,210,0.08);
  border-left-color: #00dcd2;
  color: rgba(220,245,245,0.85);
}

.technical .diagram-label {
  background: rgba(2,40,50,0.88);
  color: #00dcd2;
  border-left-color: #00dcd2;
}

/* Bảng so sánh công nghệ trong technical */
.technical .comp-table-wrap {
  border-color: rgba(0,220,210,0.2);
}
.technical .comp-table thead tr {
  background: rgba(0,100,120,0.5);
}
.technical .comp-table thead th {
  color: #ffffff;
  border-color: rgba(0,220,210,0.2);
}
.technical .comp-table tbody tr {
  border-color: rgba(0,220,210,0.1);
}
.technical .comp-table tbody tr:hover {
  background: rgba(0,220,210,0.06);
}
.technical .comp-table td {
  color: rgba(220,245,245,0.85);
  border-color: rgba(0,220,210,0.1);
}
.technical .comp-old {
  background: rgba(180,30,30,0.12);
  color: rgba(255,180,180,0.9);
}
.technical .comp-new {
  background: rgba(0,180,160,0.12);
  color: rgba(180,255,240,0.9);
}
.technical .comp-new strong { color: #00dcd2; }

/* RAS steps trên nền teal */
.technical .ras-step {
  background: rgba(255,255,255,0.05);
  border-color: rgba(0,220,210,0.15);
  border-left-color: rgba(0,220,210,0.5);
}
.technical .ras-step:hover {
  background: rgba(0,220,210,0.08);
  border-left-color: #00dcd2;
}
.technical .ras-step-num {
  background: #00dcd2;
  color: #022b3a;
}
.technical .ras-step-body strong { color: #ffffff; }
.technical .ras-step-body span { color: rgba(220,245,245,0.75); }
.technical .ras-arrow { color: #00dcd2; opacity: 0.8; }

.technical .tech-sub { color: rgba(220,245,245,0.65); }

/* ============================================================
   PRICING – BẢNG SO SÁNH RẺ/ĐỦ/BỀN + PRICING NOTE + GOLD BADGE
   ============================================================ */
.pricing-compare-wrap {
  margin-bottom: 3rem;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(200,169,110,0.2);
  border-radius: 16px;
  padding: 2rem;
}
.pricing-compare-title {
  font-family: var(--font-sans);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 1.25rem;
  letter-spacing: 0.02em;
}
.pricing-compare-table-wrap {
  width: 100%;
  overflow-x: auto;
  border-radius: 10px;
  border: 1px solid var(--border);
}
.pricing-compare-table {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
  font-size: 0.875rem;
}
.pricing-compare-table thead tr {
  background: var(--ocean-deep);
}
.pricing-compare-table thead th {
  padding: 12px 16px;
  font-weight: 700;
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: #fff;
  text-align: left;
  border-right: 1px solid rgba(255,255,255,0.08);
}
.pricing-compare-table thead th:first-child { width: 22%; }
.pricing-compare-table thead th.col-bad  { background: rgba(180,30,30,0.35); }
.pricing-compare-table thead th.col-mid  { background: rgba(180,140,0,0.35); }
.pricing-compare-table thead th.col-good { background: rgba(0,140,80,0.35); }

.pricing-compare-table tbody tr {
  border-bottom: 1px solid var(--border);
  transition: background 0.2s;
}
.pricing-compare-table tbody tr:last-child { border-bottom: none; }
.pricing-compare-table tbody tr:hover { background: var(--surface-2); }
.pricing-compare-table td {
  padding: 10px 16px;
  color: var(--text-secondary);
  border-right: 1px solid var(--border);
  vertical-align: top;
  line-height: 1.5;
}
.pricing-compare-table td:first-child { color: var(--text-primary); }
.pricing-compare-table td:nth-child(2) { background: rgba(220,30,30,0.04); }
.pricing-compare-table td:nth-child(3) { background: rgba(200,140,0,0.04); }
.pricing-compare-table td:nth-child(4) { background: rgba(0,140,80,0.05); }
.pricing-compare-table td strong { color: var(--text-primary); }

/* Pricing note – lock icon */
.pricing-note {
  font-size: 0.75rem;
  color: var(--text-muted);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.5rem 0.75rem;
  margin: 0.75rem 0;
  line-height: 1.5;
}
.pricing-card--featured .pricing-note {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.2);
  color: rgba(255,255,255,0.75);
}

/* Gold badge cho gói Cao Cấp */
.pricing-badge--gold {
  background: linear-gradient(135deg, #7c5c1e, #c8a96e, #e2c98a) !important;
  color: #0a0e14 !important;
  box-shadow: 0 0 12px rgba(200,169,110,0.4);
}

@media (max-width: 640px) {
  .pricing-compare-wrap { padding: 1rem; }
  .pricing-compare-table { min-width: 500px; }
}

/* ============================================================
   CONTRAST FIX – SẮC NÉT TOÀN TRANG (override cuối cùng)
   Mục tiêu: Tất cả text đều tương phản cao, dễ đọc
   ============================================================ */

/* ── 1. RAS STEPS (nền teal tối) ─────────────────────────── */
.technical .ras-step,
.ras-step {
  background: rgba(0, 0, 0, 0.35) !important;
  border: 1px solid rgba(0,220,210,0.3) !important;
  border-left: 3px solid #00dcd2 !important;
}
.technical .ras-step:hover,
.ras-step:hover {
  background: rgba(0,220,210,0.15) !important;
  border-left-color: #00ffee !important;
}
.technical .ras-step-body strong,
.ras-step-body strong {
  color: #ffffff !important;
  font-size: 0.95rem !important;
  font-weight: 700 !important;
  text-shadow: 0 1px 3px rgba(0,0,0,0.5);
}
.technical .ras-step-body span,
.ras-step-body span {
  color: #d4f0f0 !important;
  font-size: 0.85rem !important;
  line-height: 1.6 !important;
}
.technical .ras-arrow,
.ras-arrow {
  color: #00dcd2 !important;
  opacity: 1 !important;
  font-size: 1.6rem !important;
}
.technical .ras-step-num,
.ras-step-num {
  background: #00dcd2 !important;
  color: #011820 !important;
  font-weight: 800 !important;
  font-size: 0.75rem !important;
  width: 2.2rem !important;
  height: 2.2rem !important;
}

/* ── 2. BẢNG KỸ THUẬT (data-table, spec-row) ─────────────── */
.technical .spec-key,
.technical .data-table td,
.technical .spec-val {
  color: #ffffff !important;
}
.technical .spec-key {
  font-weight: 700 !important;
  color: #ffffff !important;
}
.technical .spec-val {
  color: #c8eef0 !important;
}
.technical .spec-row {
  border-bottom: 1px solid rgba(0,220,210,0.2) !important;
}
.technical .data-table th {
  background: rgba(0, 80, 100, 0.8) !important;
  color: #ffffff !important;
  font-weight: 700 !important;
}
.technical .data-table td {
  color: #d0eef0 !important;
  border-bottom: 1px solid rgba(0,220,210,0.15) !important;
}
.technical .data-table tr:hover td {
  background: rgba(0,220,210,0.1) !important;
}
.technical .tech-note {
  background: rgba(0,0,0,0.3) !important;
  border-left: 3px solid #00dcd2 !important;
  color: #d4f0f0 !important;
  font-size: 0.9rem !important;
}

/* ── 3. PARAM CARDS (Water Parameters) ───────────────────── */
.technical .param-card {
  background: rgba(0,0,0,0.3) !important;
  border: 1px solid rgba(0,220,210,0.3) !important;
}
.technical .param-val {
  color: #ffffff !important;
  font-size: 1rem !important;
  font-weight: 800 !important;
}
.technical .param-unit {
  color: rgba(200,240,240,0.8) !important;
}
.technical .param-name {
  color: #c8eef0 !important;
  font-weight: 600 !important;
}

/* ── 4. BẢNG SO SÁNH CÔNG NGHỆ CŨ/MỚI (comp-table) ──────── */
.technical .comp-table-wrap,
.comp-table-wrap {
  border: 1px solid rgba(0,220,210,0.3) !important;
}
.technical .comp-table thead tr,
.comp-table thead tr {
  background: rgba(0,50,70,0.9) !important;
}
.technical .comp-th-criteria,
.comp-th-criteria {
  color: #c8eef0 !important;
  font-weight: 700 !important;
}
.technical .comp-th-old,
.comp-th-old {
  color: #ff8080 !important;
  background: rgba(200,50,50,0.2) !important;
  font-weight: 700 !important;
}
.technical .comp-th-new,
.comp-th-new {
  color: #80ffcc !important;
  background: rgba(0,150,100,0.2) !important;
  font-weight: 700 !important;
}
.technical .comp-criteria,
.comp-criteria {
  color: #ffffff !important;
  font-weight: 700 !important;
  background: rgba(0,0,0,0.2) !important;
}
.technical .comp-old,
.comp-old {
  color: #ffaaaa !important;
  background: rgba(180,30,30,0.2) !important;
  border-left: 2px solid rgba(255,100,100,0.5) !important;
}
.technical .comp-new,
.comp-new {
  color: #e0fff5 !important;
  background: rgba(0,120,80,0.2) !important;
  border-left: 2px solid rgba(0,220,150,0.5) !important;
}
.technical .comp-new strong,
.comp-new strong {
  color: #00ffcc !important;
  font-weight: 700 !important;
}
.technical .comp-table tbody tr,
.comp-table tbody tr {
  border-bottom: 1px solid rgba(0,220,210,0.15) !important;
}
.technical .comp-table tbody tr:hover,
.comp-table tbody tr:hover {
  background: rgba(0,220,210,0.08) !important;
}
.technical .comp-num,
.comp-num {
  background: rgba(0,220,210,0.2) !important;
  color: #00dcd2 !important;
}

/* ── 5. BẢNG SO SÁNH RẺ/ĐỦ/BỀN (pricing-compare-table) ──── */
.pricing-compare-title {
  color: #0a0e14 !important;
  font-weight: 800 !important;
  font-size: 1.15rem !important;
}
.pricing-compare-table thead th {
  color: #ffffff !important;
  font-weight: 700 !important;
  font-size: 0.85rem !important;
}
.pricing-compare-table thead th.col-bad  { background: #b91c1c !important; }
.pricing-compare-table thead th.col-mid  { background: #b45309 !important; }
.pricing-compare-table thead th.col-good { background: #15803d !important; }
.pricing-compare-table thead th:first-child { background: #1e3a5f !important; }

.pricing-compare-table td {
  color: #1a1a2e !important;
  font-size: 0.875rem !important;
  line-height: 1.55 !important;
}
.pricing-compare-table td:first-child {
  color: #0a0e14 !important;
  font-weight: 700 !important;
  background: #f0f4f8 !important;
}
.pricing-compare-table td:nth-child(2) {
  background: #fff0f0 !important;
  color: #7f1d1d !important;
}
.pricing-compare-table td:nth-child(3) {
  background: #fffbeb !important;
  color: #78350f !important;
}
.pricing-compare-table td:nth-child(4) {
  background: #f0fdf4 !important;
  color: #14532d !important;
}
.pricing-compare-table td strong {
  color: #14532d !important;
  font-weight: 700 !important;
}
.pricing-compare-table tbody tr:hover td:first-child { background: #e2e8f0 !important; }
.pricing-compare-table tbody tr:hover td:nth-child(2) { background: #ffe4e6 !important; }
.pricing-compare-table tbody tr:hover td:nth-child(3) { background: #fef3c7 !important; }
.pricing-compare-table tbody tr:hover td:nth-child(4) { background: #dcfce7 !important; }

/* ── 6. TECH-BLOCK TITLE (nền teal) ──────────────────────── */
.technical .tech-block-title {
  color: #ffffff !important;
  font-size: 1.15rem !important;
  font-weight: 800 !important;
  border-bottom: 1px solid rgba(0,220,210,0.4) !important;
}
.technical .tech-sub {
  color: #a0d8e0 !important;
  font-style: italic;
}

/* ── 7. MATERIAL INFO (nền teal) ─────────────────────────── */
.technical .material-info h4 {
  color: #ffffff !important;
  font-weight: 700 !important;
}

/* ── 8. SECTION HEADING/LABEL (nền teal) ─────────────────── */
.technical .section-label {
  background: rgba(0,220,210,0.2) !important;
  color: #00dcd2 !important;
  border: 1px solid rgba(0,220,210,0.5) !important;
  font-weight: 700 !important;
}
.technical .section-heading {
  color: #ffffff !important;
  text-shadow: 0 2px 8px rgba(0,0,0,0.4);
}
.technical .section-heading em {
  color: #00dcd2 !important;
}
.technical .section-intro p {
  color: #c8eef0 !important;
  font-size: 1rem !important;
}

/* ── 9. GLOBAL: Đảm bảo text trên nền trắng luôn đậm ──────── */
.spec-key { color: #0a0e14 !important; font-weight: 700 !important; }
.spec-val { color: #2d3748 !important; }
.data-table td { color: #2d3748 !important; }
.tech-note { color: #2d3748 !important; }
.param-val { color: #0a0e14 !important; font-weight: 800 !important; }
.param-name { color: #2d3748 !important; font-weight: 600 !important; }
.glossary { background: linear-gradient(160deg, #0a0e1a 0%, #0d1b2a 50%, #0a1628 100%); padding: 5rem 0; } .glossary .section-heading { color: #ffffff; } .glossary .section-heading em { color: #00dcd2; } .glossary .section-sub { color: rgba(255,255,255,0.65); max-width: 640px; margin: 0 auto; } .glossary-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1.25rem; margin-top: 3rem; } .glossary-card { background: rgba(255,255,255,0.05); border: 1px solid rgba(0,220,210,0.15); border-radius: 12px; padding: 1.5rem; transition: border-color 0.3s, transform 0.3s; } .glossary-card:hover { border-color: rgba(0,220,210,0.5); transform: translateY(-3px); } .glossary-term { font-size: 0.95rem; font-weight: 700; color: #00dcd2; margin-bottom: 0.75rem; } .glossary-def { font-size: 0.85rem; color: rgba(255,255,255,0.82); line-height: 1.7; margin-bottom: 1rem; } .glossary-tag { display: inline-block; font-size: 0.68rem; font-weight: 600; text-transform: uppercase; color: #00dcd2; background: rgba(0,220,210,0.12); border: 1px solid rgba(0,220,210,0.25); border-radius: 20px; padding: 0.2rem 0.7rem; }


/* ═══════════════════════════════════════════
   BLUEPRINTS SECTION
═══════════════════════════════════════════ */
.blueprints { background: var(--bg-secondary); }

.bp-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
  justify-content: center;
}
.bp-tab {
  padding: 0.75rem 1.5rem;
  border: 2px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  border-radius: 2rem;
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 500;
  transition: all 0.3s;
}
.bp-tab.active, .bp-tab:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.bp-panel { display: none; }
.bp-panel.active { display: block; }

.bp-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}
.bp-grid--wide {
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}
.bp-card {
  background: var(--bg-primary);
  border-radius: 1rem;
  overflow: hidden;
  box-shadow: 0 2px 12px rgba(0,0,0,0.08);
  transition: transform 0.3s, box-shadow 0.3s;
}
.bp-card:hover { transform: translateY(-4px); box-shadow: 0 8px 32px rgba(0,0,0,0.15); }
.bp-card--large { grid-column: span 2; }

.bp-img-wrap {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16/9;
}
.bp-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s;
}
.bp-card:hover .bp-img-wrap img { transform: scale(1.05); }
.bp-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,120,180,0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s;
}
.bp-card:hover .bp-overlay { opacity: 1; }
.bp-overlay span {
  color: #fff;
  font-weight: 700;
  font-size: 1rem;
  border: 2px solid #fff;
  padding: 0.5rem 1.5rem;
  border-radius: 2rem;
}
.bp-info { padding: 1rem 1.25rem 1.25rem; }
.bp-info h4 { font-size: 1rem; font-weight: 700; margin-bottom: 0.4rem; color: var(--text-primary); }
.bp-info p { font-size: 0.85rem; color: var(--text-secondary); margin-bottom: 0.75rem; }
.bp-specs { display: flex; gap: 0.4rem; flex-wrap: wrap; }
.bp-specs span {
  font-size: 0.75rem;
  background: rgba(0,120,180,0.1);
  color: var(--accent);
  padding: 0.2rem 0.6rem;
  border-radius: 1rem;
  font-weight: 600;
}

/* Visit cards */
.visit-intro {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 2rem;
  color: var(--text-secondary);
}
.visit-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}
.visit-card {
  background: var(--bg-primary);
  border-radius: 1rem;
  padding: 1.5rem;
  box-shadow: 0 2px 12px rgba(0,0,0,0.08);
  position: relative;
  border-top: 3px solid var(--accent);
}
.visit-badge {
  display: inline-block;
  background: #10b981;
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.2rem 0.8rem;
  border-radius: 1rem;
  margin-bottom: 0.75rem;
}
.visit-card h4 { font-size: 1.1rem; font-weight: 700; margin-bottom: 0.25rem; }
.visit-type { font-size: 0.85rem; color: var(--accent); font-weight: 600; margin-bottom: 1rem; }
.visit-detail { margin-bottom: 1rem; }
.visit-row { display: flex; gap: 0.5rem; align-items: flex-start; margin-bottom: 0.4rem; font-size: 0.85rem; }
.visit-icon { font-size: 1rem; flex-shrink: 0; }
.visit-btn {
  display: inline-block;
  padding: 0.6rem 1.25rem;
  background: var(--accent);
  color: #fff;
  border-radius: 2rem;
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.3s;
}
.visit-btn:hover { background: var(--accent-dark, #0066aa); }
.visit-btn--primary { background: var(--accent); font-size: 1rem; padding: 0.75rem 2rem; }
.visit-card--cta {
  background: linear-gradient(135deg, var(--accent) 0%, #0066aa 100%);
  color: #fff;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  justify-content: center;
}
.visit-card--cta h4, .visit-card--cta p { color: #fff; }
.visit-cta-icon { font-size: 3rem; margin-bottom: 1rem; }
.visit-card--cta .visit-btn { background: #fff; color: var(--accent); }

/* ═══════════════════════════════════════════
   FAQ KỸ THUẬT
═══════════════════════════════════════════ */
.faq-tech { background: var(--bg-primary); }
.faq-grid { display: flex; flex-direction: column; gap: 1rem; max-width: 900px; margin: 0 auto 3rem; }
.faq-item {
  background: var(--bg-secondary);
  border-radius: 0.75rem;
  overflow: hidden;
  border: 1px solid var(--border);
  cursor: pointer;
  transition: box-shadow 0.3s;
}
.faq-item:hover { box-shadow: 0 4px 20px rgba(0,0,0,0.1); }
.faq-q {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1.25rem 1.5rem;
}
.faq-icon { font-size: 1.25rem; flex-shrink: 0; }
.faq-q h4 { flex: 1; font-size: 1rem; font-weight: 600; margin: 0; }
.faq-arrow { font-size: 0.75rem; color: var(--text-secondary); transition: transform 0.3s; flex-shrink: 0; }
.faq-item.open .faq-arrow { transform: rotate(180deg); }
.faq-a {
  display: none;
  padding: 0 1.5rem 1.5rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}
.faq-item.open .faq-a { display: block; }

.faq-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-bottom: 1rem; }
.faq-stat { padding: 1rem; border-radius: 0.5rem; text-align: center; }
.faq-stat--bad { background: rgba(239,68,68,0.1); border: 1px solid rgba(239,68,68,0.3); }
.faq-stat--good { background: rgba(16,185,129,0.1); border: 1px solid rgba(16,185,129,0.3); }
.faq-stat-label { font-size: 0.8rem; font-weight: 600; margin-bottom: 0.5rem; }
.faq-stat--bad .faq-stat-label { color: #ef4444; }
.faq-stat--good .faq-stat-label { color: #10b981; }
.faq-stat-value { font-size: 2rem; font-weight: 800; margin-bottom: 0.5rem; }
.faq-stat--bad .faq-stat-value { color: #ef4444; }
.faq-stat--good .faq-stat-value { color: #10b981; }
.faq-stat-desc { font-size: 0.8rem; color: var(--text-secondary); }

.faq-compare-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-bottom: 1rem; }
.faq-compare-col { padding: 1rem; border-radius: 0.5rem; }
.faq-compare-col--bad { background: rgba(239,68,68,0.08); }
.faq-compare-col--good { background: rgba(16,185,129,0.08); }
.faq-compare-col ul { padding-left: 1.2rem; margin-top: 0.5rem; }
.faq-compare-col li { margin-bottom: 0.3rem; font-size: 0.85rem; }

.faq-table { width: 100%; border-collapse: collapse; margin: 0.75rem 0; font-size: 0.85rem; }
.faq-table th { background: var(--accent); color: #fff; padding: 0.6rem 0.75rem; text-align: left; }
.faq-table td { padding: 0.5rem 0.75rem; border-bottom: 1px solid var(--border); }
.faq-table tr:nth-child(even) td { background: rgba(0,0,0,0.03); }

.faq-sla-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin-bottom: 1rem; }
.faq-sla-item { text-align: center; padding: 1rem; background: rgba(0,120,180,0.08); border-radius: 0.5rem; }
.faq-sla-time { font-size: 1.75rem; font-weight: 800; color: var(--accent); }
.faq-sla-label { font-size: 0.85rem; font-weight: 700; margin: 0.25rem 0; }
.faq-sla-desc { font-size: 0.78rem; color: var(--text-secondary); }

.faq-cta { text-align: center; padding: 2rem; background: var(--bg-secondary); border-radius: 1rem; }
.faq-cta p { margin-bottom: 1.25rem; font-size: 1rem; }
.faq-cta .btn { margin: 0.4rem; }

@media (max-width: 768px) {
  .bp-card--large { grid-column: span 1; }
  .faq-stats { grid-template-columns: 1fr; }
  .faq-compare-row { grid-template-columns: 1fr; }
  .faq-sla-grid { grid-template-columns: 1fr; }
  .visit-grid { grid-template-columns: 1fr; }
  .bp-grid { grid-template-columns: 1fr; }
}