/* ==========================================================================
   HISURA 9 - Máy điện phân ion kiềm (Aqualiva Việt Nam)
   Complete Design System & Stylesheet
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@400;500;600;700;800&family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&display=swap');

:root {
  /* Water Industry Pure Hydro Sapphire Design System */
  --primary: #0284c7;           /* Pure Water Hydro Sky Blue */
  --primary-dark: #0369a1;      /* Deep Ocean Sapphire Blue */
  --primary-deep: #0c4a6e;      /* Pure Abyssal Sapphire */
  --hydro-cyan: #38bdf8;        /* Ionized Hydro Cyan Glow */
  --hydro-aqua: #00bae8;        /* Pure Spring Aqua */
  --navy-dark: #0a192f;         /* Luxury Midnight Navy */
  --accent-gold: #eab308;       /* Radiant Gold CTA Accent */
  --accent-gold-hover: #ca8a04; /* Deep Gold Hover */
  --accent-green: #10b981;      /* Pure Mineral Emerald Green */
  --text-main: #0f172a;         /* Deep Slate Dark Text */
  --text-muted: #475569;        /* Cool Slate Muted Text */
  --bg-light: #f8fafc;
  --bg-blue-light: #f0f9ff;     /* Fresh Spring Water Tint */
  --border-light: #e2e8f0;
  --border-blue: #bae6fd;       /* Aqua Water Border Tint */

  --font-heading: 'Montserrat', sans-serif;
  --font-body: 'Plus Jakarta Sans', sans-serif;

  --shadow-sm: 0 4px 12px rgba(2, 132, 199, 0.08);
  --shadow-md: 0 10px 28px rgba(2, 132, 199, 0.15);
  --shadow-lg: 0 20px 45px rgba(10, 25, 47, 0.2);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-pill: 999px;

  --transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-body);
  color: var(--text-main);
  background-color: #ffffff;
  line-height: 1.6;
  overflow-x: hidden;
}

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

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

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  line-height: 1.25;
  font-weight: 700;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.8rem;
  font-weight: 700;
  font-size: 0.95rem;
  border-radius: var(--radius-pill);
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #ffffff;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-gold {
  background: linear-gradient(135deg, #e6c65c 0%, var(--accent-gold) 100%);
  color: var(--navy-dark);
}

.btn-gold:hover {
  background: var(--accent-gold-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background: transparent;
  border: 2px solid #ffffff;
  color: #ffffff;
}

.btn-outline:hover {
  background: #ffffff;
  color: var(--navy-dark);
}

/* Top Announcement Bar */
.top-bar {
  background: var(--navy-dark);
  color: #ffffff;
  padding: 0.55rem 0;
  font-size: 0.85rem;
  text-align: center;
  font-weight: 500;
}

.top-bar strong {
  color: var(--accent-gold);
}

/* Main Navigation */
.main-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: #ffffff;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.logo-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.logo-brand .brand-title {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.5px;
}

.logo-brand .brand-sub {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-weight: 600;
  display: block;
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--navy-dark);
}

.nav-links a:hover {
  color: var(--primary);
}

/* Hero Panoramic Slider Section (AlkaViva Style) */
.hero-slider-container {
  position: relative;
  width: 100%;
  height: 560px;
  overflow: hidden;
  background-color: var(--navy-dark);
}

.hero-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.8s ease-in-out, visibility 0.8s ease-in-out;
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
}

.hero-slide.active {
  opacity: 1;
  visibility: visible;
  z-index: 10;
}

.hero-slide-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(7, 23, 56, 0.85) 0%, rgba(10, 25, 47, 0.6) 55%, rgba(10, 25, 47, 0.2) 100%);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  color: #ffffff;
  max-width: 680px;
  padding-top: 1rem;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(212, 175, 55, 0.2);
  border: 1px solid var(--accent-gold);
  color: var(--accent-gold);
  padding: 0.4rem 1rem;
  border-radius: var(--radius-pill);
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 1.2rem;
  backdrop-filter: blur(4px);
}

.hero-title {
  font-size: 3.2rem;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 1rem;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.hero-title span {
  color: #38bdf8;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: #e2e8f0;
  margin-bottom: 2rem;
  line-height: 1.6;
  text-shadow: 0 1px 6px rgba(0, 0, 0, 0.3);
}

.hero-cta-group {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 2.2rem;
}

.hero-trust-badges {
  display: flex;
  align-items: center;
  gap: 1.8rem;
  font-size: 0.85rem;
  color: #cbd5e1;
}

.hero-trust-badges i {
  color: var(--accent-gold);
}

/* Slider Controls & Wave SVG */
.slider-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 20;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.4);
  color: #ffffff;
  font-size: 1.6rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  backdrop-filter: blur(8px);
  transition: var(--transition);
}

.slider-arrow:hover {
  background: rgba(255, 255, 255, 0.9);
  color: var(--navy-dark);
}

.slider-prev { left: 1.5rem; }
.slider-next { right: 1.5rem; }

.slider-dots {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.slider-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
  cursor: pointer;
  transition: var(--transition);
}

.slider-dot.active {
  width: 32px;
  border-radius: var(--radius-pill);
  background: var(--accent-gold);
}

.slider-pause-btn {
  position: absolute;
  bottom: 2rem;
  right: 2.5rem;
  z-index: 20;
  color: #ffffff;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 1px;
  background: rgba(0, 0, 0, 0.4);
  padding: 0.4rem 0.9rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(255, 255, 255, 0.3);
  backdrop-filter: blur(4px);
  cursor: pointer;
}

.hero-bottom-wave {
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 100%;
  z-index: 15;
  line-height: 0;
  pointer-events: none;
}

.hero-bottom-wave svg {
  width: 100%;
  height: 48px;
  fill: var(--bg-blue-light);
}

/* 4 Value Pillars */
.pillars-section {
  padding: 5rem 0;
  background: var(--bg-blue-light);
}

.pillars-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-top: 3rem;
}

.pillar-card {
  background: #ffffff;
  border-radius: var(--radius-md);
  padding: 1.8rem;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-light);
  transition: var(--transition);
}

.pillar-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}

/* Family Showcase Card */
.family-showcase-card {
  margin-top: 3.5rem;
  background: #ffffff;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  align-items: center;
}

.family-showcase-content {
  padding: 3rem;
}

.family-showcase-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  min-height: 360px;
}

/* Tech Infographics Grid */
.tech-infographics-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.tech-card {
  background: #ffffff;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-light);
}

.tech-card-body {
  padding: 1.8rem;
}

.tech-card-img {
  width: 100%;
  height: 260px;
  object-fit: cover;
}

.pillar-num {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--bg-blue-light);
  color: var(--primary);
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.2rem;
  font-size: 1.1rem;
}

.pillar-title {
  font-size: 1.15rem;
  color: var(--navy-dark);
  margin-bottom: 0.8rem;
}

.pillar-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* Ownership Options Section */
.pricing-section {
  padding: 5rem 0;
  background: #ffffff;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-top: 3rem;
}

.pricing-card {
  background: #ffffff;
  border: 2px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 2.2rem;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition);
}

.pricing-card.featured {
  border-color: var(--primary);
  box-shadow: var(--shadow-lg);
}

.featured-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 0.3rem 1rem;
  border-radius: var(--radius-pill);
  text-transform: uppercase;
}

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

.plan-title {
  font-size: 1.3rem;
  color: var(--navy-dark);
  margin-bottom: 0.4rem;
}

.plan-price {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--navy-dark);
  margin: 1rem 0 1.5rem;
}

.plan-price span {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: 400;
}

.plan-features {
  list-style: none;
  margin-bottom: 2rem;
  flex-grow: 1;
}

.plan-features li {
  font-size: 0.9rem;
  color: var(--text-main);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.plan-features i {
  color: var(--accent-green);
}

/* Specs Table */
.specs-section {
  padding: 5rem 0;
  background: var(--bg-light);
}

.specs-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 2rem;
  background: #ffffff;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.specs-table td {
  padding: 1.1rem 1.5rem;
  border-bottom: 1px solid var(--border-light);
  font-size: 0.95rem;
}

.specs-table tr td:first-child {
  font-weight: 700;
  color: var(--navy-dark);
  width: 35%;
  background: #f8fafc;
}

/* Footer */
.site-footer {
  background: var(--navy-dark);
  color: #cbd5e1;
  padding: 4rem 0 2rem;
  font-size: 0.9rem;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.8fr repeat(3, 1fr);
  gap: 2.5rem;
  margin-bottom: 3rem;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  font-size: 0.82rem;
}

/* JTBD (Jobs To Be Done) Redesigned Section */
.jtbd-section {
  padding: 5.5rem 0;
  background: linear-gradient(180deg, #ffffff 0%, var(--bg-blue-light) 100%);
}

.jtbd-tabs {
  display: flex;
  justify-content: center;
  gap: 1.2rem;
  margin: 2.2rem 0 3rem;
  flex-wrap: wrap;
}

.jtbd-tab-btn {
  padding: 1rem 2rem;
  border-radius: var(--radius-pill);
  border: 2px solid var(--border-blue);
  background: #ffffff;
  color: var(--navy-dark);
  font-weight: 700;
  font-size: 0.98rem;
  cursor: pointer;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  box-shadow: var(--shadow-sm);
}

.jtbd-tab-btn i {
  color: var(--primary);
  font-size: 1.1rem;
}

.jtbd-tab-btn:hover, .jtbd-tab-btn.active {
  border-color: var(--primary);
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #ffffff;
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.jtbd-tab-btn:hover i, .jtbd-tab-btn.active i {
  color: var(--accent-gold);
}

.jtbd-content-panel {
  display: none;
  border-radius: var(--radius-lg);
  min-height: 520px;
  box-shadow: 0 25px 50px rgba(0, 102, 153, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.2);
  position: relative;
  overflow: hidden;
  background-size: cover;
  background-position: center right;
  background-repeat: no-repeat;
  transition: all 0.4s ease;
}

.jtbd-content-panel.active {
  display: block;
}

#job-tc {
  background-image: url('assets/jtbd-family-block.jpg');
}

#job-sk {
  background-image: url('assets/jtbd-health-block.jpg');
}

#job-wl {
  background-image: url('assets/jtbd-wellness-block.jpg');
}

.jtbd-panel-overlay {
  width: 100%;
  height: 100%;
  min-height: 520px;
  background: linear-gradient(90deg, rgba(3, 35, 75, 0.95) 0%, rgba(2, 60, 115, 0.90) 45%, rgba(2, 80, 145, 0.45) 75%, transparent 100%);
  padding: 3.2rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.jtbd-panel-content {
  max-width: 580px;
  color: #ffffff;
}

.jtbd-problem-box {
  background: rgba(3, 105, 161, 0.25);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-left: 4px solid var(--hydro-cyan);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 1.4rem 1.6rem;
  margin-bottom: 1.2rem;
  border-top: 1px solid rgba(56, 189, 248, 0.25);
  border-right: 1px solid rgba(56, 189, 248, 0.25);
  border-bottom: 1px solid rgba(56, 189, 248, 0.25);
}

.jtbd-solution-box {
  background: rgba(16, 185, 129, 0.22);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-left: 4px solid var(--accent-green);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 1.4rem 1.6rem;
  margin-bottom: 1.8rem;
  border-top: 1px solid rgba(52, 211, 153, 0.25);
  border-right: 1px solid rgba(52, 211, 153, 0.25);
  border-bottom: 1px solid rgba(52, 211, 153, 0.25);
}

.jtbd-floating-tag {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  background: rgba(3, 35, 75, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: #ffffff;
  padding: 0.6rem 1.4rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--hydro-cyan);
  box-shadow: 0 10px 30px rgba(2, 132, 199, 0.3);
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  font-size: 0.82rem;
  font-weight: 700;
  z-index: 3;
}

/* Forces of Progress Unified Master Visual Block */
.forces-master-block {
  margin-top: 5rem;
  background-image: url('assets/forces-bg.jpg');
  background-size: cover;
  background-position: center;
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  box-shadow: 0 25px 60px rgba(0, 102, 153, 0.3);
  border: 1px solid rgba(56, 189, 248, 0.3);
}

.forces-master-overlay {
  background: linear-gradient(180deg, rgba(3, 35, 75, 0.92) 0%, rgba(2, 70, 130, 0.96) 100%);
  padding: 4rem 2.8rem;
  color: #ffffff;
}

.forces-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.6rem;
  margin-top: 2.8rem;
}

.force-card {
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-radius: var(--radius-md);
  padding: 2rem 1.5rem;
  border: 1px solid rgba(255, 255, 255, 0.18);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  text-align: left;
}

.force-card:hover {
  transform: translateY(-8px);
  background: rgba(255, 255, 255, 0.15);
  border-color: var(--accent-gold);
  box-shadow: 0 20px 40px rgba(212, 175, 55, 0.3);
}

.force-num {
  font-size: 0.8rem;
  font-weight: 800;
  color: var(--accent-gold);
  letter-spacing: 1px;
  margin-bottom: 0.4rem;
  text-transform: uppercase;
}

/* High-Tech Specs Master Visual Section */
.specs-master-section {
  padding: 5.5rem 0;
  background: linear-gradient(180deg, #0a192f 0%, #0d2544 100%);
  color: #ffffff;
  position: relative;
  overflow: hidden;
}

.specs-master-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: stretch;
  margin-top: 3rem;
}

.specs-gallery-wrapper {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.specs-image-wrapper {
  flex: 1;
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 25px 60px rgba(0, 102, 153, 0.4);
  border: 1.5px solid rgba(255, 255, 255, 0.25);
  background: #ffffff;
  min-height: 480px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.specs-image-wrapper img {
  width: 100%;
  height: 100%;
  max-height: 500px;
  object-fit: contain;
  padding: 1rem;
  display: block;
  transition: opacity 0.3s ease;
}

.specs-thumb-nav {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.8rem;
  margin-top: 1rem;
}

.specs-thumb-btn {
  border-radius: var(--radius-md);
  border: 2px solid rgba(255, 255, 255, 0.2);
  background: #ffffff;
  padding: 0.3rem;
  height: 75px;
  cursor: pointer;
  transition: all 0.3s ease;
  overflow: hidden;
}

.specs-thumb-btn img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.specs-thumb-btn:hover, .specs-thumb-btn.active {
  border-color: var(--accent-gold);
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(234, 179, 8, 0.3);
}

.specs-tag-pill {
  position: absolute;
  background: rgba(10, 25, 47, 0.85);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: #ffffff;
  padding: 0.6rem 1.2rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(255, 255, 255, 0.3);
  font-size: 0.8rem;
  font-weight: 800;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  z-index: 5;
}

.specs-tag-pill.tag-top {
  top: 1.2rem;
  left: 1.2rem;
}

.specs-tag-pill.tag-bottom {
  bottom: 1.2rem;
  right: 1.2rem;
}

.spec-cards-list {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}

.spec-item-card {
  background: rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-md);
  padding: 1.2rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1.3rem;
  transition: all 0.3s ease;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
}

.spec-item-card:hover {
  transform: translateX(6px);
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--accent-gold);
  box-shadow: 0 10px 30px rgba(212, 175, 55, 0.2);
}

.spec-item-icon {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(0, 102, 153, 0.4) 0%, rgba(0, 102, 153, 0.1) 100%);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--accent-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.spec-item-label {
  font-size: 0.82rem;
  font-weight: 800;
  color: var(--accent-gold);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 0.2rem;
}

.spec-item-val {
  font-size: 0.95rem;
  color: #ffffff;
  font-weight: 600;
  line-height: 1.4;
}

/* Official Product Gallery Showcase Section */
.official-gallery-section {
  padding: 5rem 0;
  background: var(--bg-light);
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1.2rem;
  margin-top: 2.5rem;
}

.gallery-card {
  background: #ffffff;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-blue);
  transition: var(--transition);
  position: relative;
}

.gallery-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
}

.gallery-card img {
  width: 100%;
  height: 240px;
  object-fit: contain;
  background: #ffffff;
  padding: 1rem;
  display: block;
}

.gallery-caption {
  padding: 0.8rem 1rem;
  text-align: center;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--navy-dark);
  border-top: 1px solid var(--border-light);
  background: #f8fafc;
}

@media (max-width: 992px) {
  .gallery-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .hero-slider-container {
    height: 480px;
  }

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

  .jtbd-content-panel {
    min-height: auto;
  }

  .jtbd-panel-overlay {
    padding: 2.2rem 1.5rem;
    background: linear-gradient(180deg, rgba(3, 35, 75, 0.96) 0%, rgba(2, 60, 115, 0.92) 80%, rgba(3, 35, 75, 0.88) 100%);
  }

  .jtbd-panel-content {
    max-width: 100%;
  }

  .jtbd-floating-tag {
    position: static;
    margin-bottom: 1.2rem;
    display: inline-flex;
  }

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

  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 520px;
    margin-left: auto;
    margin-right: auto;
  }

  .specs-master-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .specs-image-wrapper {
    min-height: 340px;
  }
}

@media (max-width: 992px) {
  .gallery-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .hero-slider-container {
    height: 480px;
  }

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

  .jtbd-content-panel {
    min-height: auto;
  }

  .jtbd-panel-overlay {
    padding: 2.2rem 1.5rem;
    background: linear-gradient(180deg, rgba(3, 35, 75, 0.96) 0%, rgba(2, 60, 115, 0.92) 80%, rgba(3, 35, 75, 0.88) 100%);
  }

  .jtbd-panel-content {
    max-width: 100%;
  }

  .jtbd-floating-tag {
    position: static;
    margin-bottom: 1.2rem;
    display: inline-flex;
  }

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

  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 520px;
    margin-left: auto;
    margin-right: auto;
  }

  .specs-master-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .specs-image-wrapper {
    min-height: 340px;
  }
}

/* ==========================================================================
   Ultra-Polished Mobile Responsive System (Friendly & Easy Criteria)
   ========================================================================== */

@media (max-width: 768px) {
  /* 1. Header & Navigation Bar */
  .top-bar {
    display: none !important;
  }

  .main-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
  }

  .header-inner {
    height: 64px;
    padding: 0 1rem;
  }

  .logo-brand .brand-title {
    font-size: 1.35rem;
    font-weight: 900;
  }

  .logo-brand .brand-sub {
    font-size: 0.65rem;
  }

  .header-inner .btn-primary {
    display: none !important;
  }

  .header-hotline-pill {
    padding: 0.45rem 0.85rem;
    font-size: 0.82rem;
    font-weight: 800;
    gap: 0.4rem;
  }

  .nav-toggle-btn {
    display: flex !important;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    font-size: 1.3rem;
    color: var(--primary);
    background: rgba(2, 132, 199, 0.08);
    border: 1px solid var(--border-blue);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
  }

  .nav-toggle-btn:active {
    transform: scale(0.95);
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: #ffffff;
    flex-direction: column;
    padding: 1.4rem 1.2rem;
    gap: 1rem;
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.16);
    border-top: 1px solid var(--border-light);
    z-index: 1000;
  }

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

  .nav-links a {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--navy-dark);
    padding: 0.5rem 0;
    border-bottom: 1px dashed var(--border-light);
  }

  .nav-links a:last-child {
    border-bottom: none;
  }

  /* 2. Hero Banner Slider */
  .hero-slider-container {
    height: 380px;
  }

  .slider-arrow, .slider-pause-btn {
    display: none !important;
  }

  .hero-content {
    padding-top: 0.4rem;
    max-width: 100%;
  }

  .hero-tag {
    font-size: 0.76rem;
    font-weight: 800;
    padding: 0.35rem 0.85rem;
    margin-bottom: 0.8rem;
  }

  .hero-title {
    font-size: 1.45rem !important;
    line-height: 1.28 !important;
    margin-bottom: 0.6rem !important;
    font-weight: 800 !important;
  }

  .hero-subtitle {
    font-size: 0.86rem !important;
    line-height: 1.5 !important;
    margin-bottom: 1.1rem !important;
    color: rgba(255, 255, 255, 0.92) !important;
  }

  .hero-cta-group {
    flex-direction: column;
    width: 100%;
    gap: 0.6rem;
    margin-bottom: 1.2rem;
  }

  .hero-cta-group .btn {
    width: 100%;
    min-height: 48px;
    padding: 0.8rem 1.2rem;
    font-size: 0.92rem;
    font-weight: 800;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-pill);
    box-shadow: 0 8px 22px rgba(0, 102, 153, 0.35);
  }

  .hero-cta-group .btn-outline {
    display: none;
  }

  .hero-trust-badges {
    flex-wrap: wrap;
    gap: 0.6rem !important;
    font-size: 0.74rem !important;
    justify-content: center;
  }

  /* 3. Section Titles & General Spacing */
  section {
    padding: 3rem 0;
  }

  section h2 {
    font-size: 1.55rem !important;
    line-height: 1.3 !important;
    margin-bottom: 0.6rem !important;
  }

  section p {
    font-size: 0.88rem !important;
    line-height: 1.55 !important;
  }

  /* 4. 4 Value Pillars Section */
  .pillars-grid {
    grid-template-columns: 1fr;
    gap: 1.4rem;
    margin-top: 1.8rem;
  }

  .pillar-card {
    display: flex;
    flex-direction: column;
    text-align: left;
    padding: 1.25rem !important;
    border-radius: var(--radius-md);
  }

  .pillar-card img {
    width: 100%;
    height: 160px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    margin-bottom: 1rem;
  }

  .pillar-title {
    font-size: 1.25rem !important;
    line-height: 1.35 !important;
    margin-bottom: 0.5rem !important;
  }

  .pillar-desc {
    font-size: 0.9rem !important;
    line-height: 1.6 !important;
    color: #4b5563 !important;
  }

  .family-showcase-card {
    grid-template-columns: 1fr !important;
    margin-top: 2rem !important;
    border-radius: var(--radius-md) !important;
  }

  .family-showcase-content {
    padding: 1.5rem 1.2rem !important;
  }

  .family-showcase-content h3 {
    font-size: 1.35rem !important;
    line-height: 1.35 !important;
    margin: 0.4rem 0 0.8rem !important;
  }

  .family-showcase-img {
    min-height: 220px !important;
    height: 220px !important;
  }

  .tech-infographics-grid {
    grid-template-columns: 1fr !important;
    gap: 1.4rem !important;
  }

  .tech-card {
    border-radius: var(--radius-md) !important;
  }

  .tech-card-img {
    height: 200px !important;
  }

  .tech-card-body {
    padding: 1.25rem !important;
  }

  .tech-card-body h3 {
    font-size: 1.22rem !important;
    line-height: 1.35 !important;
    margin: 0.4rem 0 0.6rem !important;
  }

  /* 5. Need Tabs & Solutions Section */
  .jtbd-tabs {
    flex-direction: column;
    gap: 0.6rem;
    margin: 1.4rem 0 1.8rem;
  }

  .jtbd-tab-btn {
    width: 100%;
    min-height: 46px;
    text-align: center;
    justify-content: center;
    padding: 0.85rem 1.2rem;
    font-size: 0.92rem;
    font-weight: 700;
    border-radius: var(--radius-pill);
  }

  .jtbd-tab-btn.active {
    box-shadow: 0 6px 18px rgba(2, 132, 199, 0.28);
  }

  .jtbd-content-panel {
    min-height: auto;
    border-radius: var(--radius-md);
  }

  .jtbd-panel-overlay {
    padding: 1.6rem 1.2rem;
    min-height: auto;
    background: linear-gradient(180deg, #03234b 0%, #024888 100%);
  }

  .jtbd-panel-content h3 {
    font-size: 1.35rem !important;
    line-height: 1.35 !important;
  }

  .jtbd-problem-box, .jtbd-solution-box {
    padding: 1rem 1.2rem;
    font-size: 0.88rem;
    line-height: 1.55;
    border-radius: var(--radius-sm);
  }

  /* 6. 4 Forces Master Block */
  .forces-master-block {
    margin-top: 2.8rem;
    border-radius: var(--radius-md);
  }

  .forces-master-overlay {
    padding: 2rem 1.2rem;
  }

  .forces-master-overlay h3 {
    font-size: 1.45rem !important;
    line-height: 1.3 !important;
  }

  .forces-grid {
    grid-template-columns: 1fr;
    gap: 1.2rem;
    margin-top: 1.6rem;
  }

  .force-card {
    padding: 1.15rem !important;
    border-radius: var(--radius-md) !important;
  }

  .force-card img {
    height: 160px;
    border-radius: var(--radius-sm);
  }

  /* 7. Pricing 3 Gói Sở Hữu */
  .pricing-grid {
    grid-template-columns: 1fr;
    gap: 1.6rem;
    max-width: 100%;
    margin-top: 2rem;
  }

  .pricing-card {
    padding: 1.3rem !important;
    border-radius: var(--radius-md) !important;
  }

  .pricing-card .btn {
    width: 100%;
    min-height: 48px;
    font-size: 0.92rem;
    font-weight: 800;
    border-radius: var(--radius-pill);
  }

  /* 8. Tech Specs & Official Gallery */
  .specs-master-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .specs-image-wrapper {
    min-height: 250px;
  }

  .specs-image-wrapper img {
    max-height: 280px;
  }

  .specs-thumb-btn {
    height: 52px;
  }

  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.8rem;
  }

  .gallery-card img {
    height: 160px;
    padding: 0.6rem;
  }

  /* 9. Floating Hotline Phone Widget */
  .floating-phone-btn {
    bottom: 1rem;
    right: 1rem;
    padding: 0.75rem 1.2rem;
    min-height: 48px;
    font-size: 0.88rem;
    font-weight: 800;
    box-shadow: 0 10px 25px rgba(16, 185, 129, 0.45);
  }

  /* 10. Footer Mobile Redesign (Spacious 1-Column Stack) */
  .site-footer {
    padding: 3rem 0 2rem !important;
  }

  .footer-inner {
    grid-template-columns: 1fr !important;
    gap: 2.2rem !important;
    margin-bottom: 2.2rem !important;
    text-align: left;
  }

  .footer-inner h3 {
    font-size: 1.45rem !important;
    margin-bottom: 0.6rem !important;
    color: #ffffff !important;
  }

  .footer-inner h4 {
    font-size: 1.1rem !important;
    margin-bottom: 0.8rem !important;
    color: #ffffff !important;
    border-bottom: 1px solid rgba(255, 255, 255, 0.15);
    padding-bottom: 0.5rem;
  }

  .footer-inner p {
    font-size: 0.88rem !important;
    line-height: 1.6 !important;
    color: #cbd5e1 !important;
  }

  .footer-inner ul li {
    margin-bottom: 0.65rem !important;
  }

  .footer-inner ul li a {
    font-size: 0.92rem !important;
    color: #94a3b8 !important;
  }

  .footer-bottom {
    flex-direction: column !important;
    text-align: center !important;
    gap: 0.8rem !important;
    padding-top: 1.5rem !important;
    border-top: 1px solid rgba(255, 255, 255, 0.15) !important;
    font-size: 0.8rem !important;
    line-height: 1.55 !important;
    color: #94a3b8 !important;
  }
}

@media (max-width: 480px) {
  .hero-slider-container {
    height: 360px;
  }

  .hero-title {
    font-size: 1.32rem !important;
  }

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