/* ===================================
   ROOT VARIABLES & RESET
   ================================= */
:root {
  /* Color Palette */
  --primary-color: #2563eb;
  --secondary-color: #10b981;
  --accent-color: #f59e0b;
  --neutral-light: #f8fafc;
  --neutral-dark: #1e293b;
  --white: #ffffff;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;

  /* Typography */
  --font-primary: "Roboto", sans-serif;
  --font-secondary: "Open Sans", sans-serif;

  /* Spacing */
  --section-padding: 5rem 0;
  --container-padding: 1rem;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1),
    0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1),
    0 8px 10px -6px rgb(0 0 0 / 0.1);

  /* Number of client logos in .clients-section */
  --number-of-client-logos: 24;
}
.hero-section {
  margin-top: 80px; /* tạo khoảng cách với header */
  background: linear-gradient(to bottom right, #eaf4ff, #ffffff);
}

.hero-title {
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1.3;
  color: #004aad;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: #1a8b3a;
  font-weight: 500;
}

.hero-description {
  font-size: 1rem;
  color: #333;
  max-width: 90%;
}

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

body {
  font-family: var(--font-primary);
  line-height: 1.6;
  color: var(--neutral-dark);
  overflow-x: hidden;
}

/* ===================================
     TYPOGRAPHY
     ================================= */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
}

h2 {
  font-size: clamp(2rem, 4vw, 2.5rem);
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
}

h4 {
  font-size: 1.5rem;
}

h5 {
  font-size: 1.25rem;
}

h6 {
  font-size: 1.125rem;
}

p {
  margin-bottom: 1rem;
  font-size: 1rem;
  text-align: justify;
}

.nowrap {
  white-space: nowrap;
}

.section-title {
  color: var(--primary-color);
  margin-bottom: 2rem;
  position: relative;
}

.section-title::after {
  content: "";
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
  border-radius: 2px;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--gray-600);
  margin-bottom: 2rem;
}

/* ===================================
     BUTTONS & INTERACTIVE ELEMENTS
     ================================= */
.btn {
  font-weight: 600;
  border-radius: 8px;
  padding: 0.75rem 1.5rem;
  transition: all var(--transition-normal);
  border: none;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.btn-primary {
  background: var(--primary-color);
  color: var(--white);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  background: #1d4ed8;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  color: var(--white);
}

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

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

.btn-cta {
  background: var(--accent-color);
  color: var(--white);
  font-weight: 600;
  padding: 0.75rem 1.5rem;
  border-radius: 6px;
  border: none;
  transition: all var(--transition-normal);
}

.btn-cta:hover {
  background: #d97706;
  transform: translateY(-2px);
  color: var(--white);
}

.btn-lg {
  padding: 1rem 2rem;
  font-size: 1.125rem;
}

/* ===================================
     HEADER & NAVIGATION
     ================================= */
.navbar {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  transition: all var(--transition-normal);
  padding: 1rem 0;
  box-shadow: var(--shadow-sm);
}

.navbar.scrolled {
  background: var(--white);
  box-shadow: var(--shadow-md);
  padding: 0.5rem 0;
}

.navbar-brand .logo {
  height: 70px;
  width: 100px;
  transition: all var(--transition-normal);
  border-radius: 18px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.navbar-nav .nav-link {
  color: var(--neutral-dark);
  font-weight: 500;
  margin: 0 0.5rem;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  transition: all var(--transition-normal);
  position: relative;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
  color: var(--primary-color);
  background: rgba(37, 99, 235, 0.1);
}

.navbar-nav .nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 30px;
  height: 2px;
  background: var(--accent-color);
  border-radius: 1px;
}

.navbar-toggler {
  border: none;
  padding: 0.25rem 0.5rem;
}

.navbar-toggler:focus {
  box-shadow: none;
}

@media (max-width: 991.98px) {
  .navbar-toggler {
    display: block !important;
    z-index: 1001;
  }
  .navbar-collapse {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #fff;
    width: 100vw;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
    padding: 1rem 0.5rem;
    z-index: 1000;
  }
  .navbar-nav {
    flex-direction: column !important;
    align-items: flex-start !important;
    width: 100%;
  }
  .navbar .container {
    position: relative;
  }
}
/* img chuyen gia tu van */
.consultant-photo {
  width: 120px;      /* chỉnh kích thước mong muốn */
  height: 120px;     /* phải bằng width để thành vuông */
  object-fit: cover; /* cắt ảnh để không méo */
  border-radius: 50%; /* bo tròn tuyệt đối */
}

/* ===================================
     HERO SECTION
     ================================= */
.hero-section {
  margin-top: 82px;
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, #e0f2fe 0%, #bfdbfe 100%);
  overflow: hidden;
}

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: radial-gradient(
      circle at 20% 80%,
      rgba(37, 99, 235, 0.1) 0%,
      transparent 50%
    ),
    radial-gradient(
      circle at 80% 20%,
      rgba(16, 185, 129, 0.1) 0%,
      transparent 50%
    );
}

.hero-background::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: polygon(
    74.1% 44.1%,
    100% 61.6%,
    97.5% 26.9%,
    85.5% 0.1%,
    80.7% 2%,
    72.5% 32.5%,
    60.2% 62.4%,
    52.4% 68.1%,
    47.5% 58.3%,
    45.2% 34.5%,
    27.5% 76.7%,
    0.1% 64.9%,
    17.9% 100%,
    27.6% 76.8%,
    76.1% 97.7%,
    74.1% 44.1%
  );
  opacity: 0.05;
}

.hero-container {
  padding: 3rem;
}

.hero-title {
  color: var(--primary-color);
  margin-bottom: 1rem;
  font-weight: 700;
}

.hero-subtitle {
  color: var(--secondary-color);
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
}

.hero-description {
  font-size: 1.125rem;
  color: var(--gray-600);
  margin-bottom: 2rem;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero-visual {
  position: relative;
  text-align: center;
}

.hero-image {
  max-width: 100%;
  height: auto;
  border-radius: 16px;
  box-shadow: var(--shadow-xl);
  animation: heroImageFloat 3s ease-in-out infinite;
}

@keyframes heroImageFloat {
  0%,
  100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-10px);
  }
}

/* ===================================
     ABOUT SECTION
     ================================= */
.about-section {
  padding: var(--section-padding);
  background: var(--white);
  position: relative;
}

.about-section::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23f1f5f9' fill-opacity='0.4'%3E%3Ccircle cx='30' cy='30' r='2'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.5;
}

.highlight-box {
  background: linear-gradient(
    135deg,
    var(--primary-color),
    var(--secondary-color)
  );
  color: var(--white);
  padding: 2rem;
  border-radius: 12px;
  margin-bottom: 1rem;
  box-shadow: var(--shadow-lg);
}

.highlight-text {
  font-size: 1.125rem;
  font-weight: 400;
  margin: 0;
}

.key-features {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.feature-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  background: var(--gray-100);
  border-radius: 8px;
  transition: all var(--transition-normal);
}

.feature-item:hover {
  background: var(--white);
  box-shadow: var(--shadow-md);
  transform: translateX(5px);
}

.feature-icon {
  font-size: 1.5rem;
  min-width: 2rem;
}

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

.stat-card {
  background: linear-gradient(135deg, #ffffff 0%, #f0f9ff 100%);
  padding: 1.5rem 1rem;
  border-radius: 16px;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(37, 99, 235, 0.1);
}

.stat-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
  opacity: 0;
  transition: opacity 0.3s ease;
}

.stat-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 30px rgba(37, 99, 235, 0.15);
  border-color: rgba(37, 99, 235, 0.2);
}

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

.stat-number {
  font-size: 2.5rem;
  font-weight: 700;
  background: linear-gradient(
    135deg,
    var(--primary-color),
    var(--accent-color)
  );
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 0.5rem;
  display: inline-block;
  position: relative;
}

.stat-number::after {
  content: "+";
  font-size: 1.5rem;
  position: absolute;
  top: 0;
  right: -1rem;
  background: inherit;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat-label {
  color: var(--gray-600);
  font-weight: 500;
  margin: 0;
}

/* ===================================
     MODEL SECTION
     ================================= */
.model-section {
  padding: var(--section-padding);
  background: linear-gradient(135deg, #e0f2fe 0%, #ffffff 100%);
  position: relative;
}

.model-controls {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.model-btn {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.5rem;
  background: var(--white);
  border: 2px solid var(--gray-200);
  border-radius: 12px;
  text-align: left;
  transition: all var(--transition-normal);
  cursor: pointer;
  font-weight: 500;
  color: var(--neutral-dark);
}

.model-btn:hover {
  border-color: var(--primary-color);
  transform: translateX(5px);
  box-shadow: var(--shadow-md);
}

.model-btn.active {
  border-color: var(--accent-color);
  background: linear-gradient(135deg, var(--accent-color), #fbbf24);
  color: var(--white);
  box-shadow: var(--shadow-lg);
}

.model-btn.active::after {
  content: "→";
  margin-left: auto;
  font-size: 1.25rem;
}

.model-icon {
  font-size: 1.5rem;
  min-width: 2rem;
}

.model-display {
  position: relative;
  min-height: 500px;
  background: var(--white);
  border-radius: 16px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.model-content {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition-normal);
  padding: 2rem;
}

.model-content.active {
  opacity: 1;
}

.model-content img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
}

/* ===================================
     FEATURES SECTION
     ================================= */
.features-section {
  padding: var(--section-padding);
  background: var(--gray-100);
}

.mobile-mockup,
.dashboard-mockup {
  text-align: center;
  position: relative;
}

.mobile-mockup img {
  max-width: 100%;
  height: auto;
  border-radius: 4px;
  box-shadow: var(--shadow-xl);
  animation: mockupFloat 4s ease-in-out infinite;
}

@keyframes mockupFloat {
  0%,
  100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-15px);
  }
}

.features-group {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.feature-card {
  display: flex;
  align-items: flex-start;
  gap: 1.5rem;
  padding: 1.5rem;
  background: var(--white);
  border-radius: 12px;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
}

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

.feature-icon-lg {
  width: 3.5rem;
  height: 3.5rem;
  background: #e0f2fe;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: white;
  flex-shrink: 0;
}

.feature-content {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.feature-card h4 {
  color: var(--neutral-dark);
  margin: 0;
  font-size: 1.25rem;
  font-weight: 600;
}

.feature-card p {
  color: var(--gray-600);
  margin: 0;
  line-height: 1.5;
}

/* Dashboard Charts */
.dashboard-charts {
  background: #fff;
  border-radius: 15px;
  padding: 20px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.chart-container {
  position: relative;
  height: 350px;
  width: 100%;
}

/* ===================================
     BENEFITS SECTION
     ================================= */
.benefits-section {
  padding: var(--section-padding);
  background: var(--white);
}

.benefit-card {
  text-align: center;
  padding: 2rem 1.8rem;
  background: var(--gray-100);
  border-radius: 16px;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  height: 100%;
  border: 2px solid transparent;
}

.benefit-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-color);
}

.benefit-icon {
  font-size: 3rem;
  margin-bottom: 1.5rem;
  display: block;
}

.benefit-card h4 {
  color: var(--primary-color);
  margin-bottom: 1.5rem;
}

.benefit-list {
  list-style: none;
  padding: 0;
  text-align: left;
}

.benefit-list li {
  padding: 0.5rem 0;
  color: var(--gray-800);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* ===================================
    SECURITY/SUPPORT SECTION
     ================================= */

.security-support-section {
  padding: var(--section-padding);
  background: linear-gradient(135deg, var(--neutral-dark) 0%, #0f172a 100%);
  position: relative;
  overflow: hidden;
}

.security-support-section::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: radial-gradient(
      circle at 25% 25%,
      rgba(37, 99, 235, 0.1) 0%,
      transparent 50%
    ),
    radial-gradient(
      circle at 75% 75%,
      rgba(16, 185, 129, 0.1) 0%,
      transparent 50%
    );
  z-index: 0;
}

.security-support-section .section-title {
  color: var(--white);
}

.custom-tab-buttons {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.custom-tab-button {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(5px);
  border-radius: 12px;
  color: var(--gray-300);
  padding: 1rem 2rem;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-normal);
}

.custom-tab-button:hover {
  color: var(--white);
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-3px);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.custom-tab-button.active {
  background: linear-gradient(
    135deg,
    var(--primary-color),
    var(--secondary-color)
  );
  color: var(--white);
  border-color: transparent;
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4);
}

.custom-tab-button i {
  margin-right: 0.5rem;
}

.custom-tab-content {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(5px);
  border-radius: 15px;
  padding: 2.5rem;
  margin-top: 1rem;
}

.custom-tab-pane {
  display: none;
  animation: fadeIn 0.5s ease;
}

.custom-tab-pane.active {
  display: block;
}

/* Re-using styles from the original dark section, but adapting them for light background */
.security-support-section .security-item,
.security-support-section .support-item {
  text-align: center;
  padding: 2rem 1rem;
}

.security-support-section .security-item i,
.security-support-section .support-item i {
  font-size: 3rem;
  color: var(--accent-color);
  margin-bottom: 1rem;
  display: block;
}

.security-support-section .security-item h5,
.security-support-section .support-item h5 {
  color: var(--white);
  margin-bottom: 1rem;
}

.security-support-section .security-item p,
.security-support-section .support-item p {
  color: var(--gray-300);
  opacity: 0.9;
  margin: 0;
  text-align: center;
}

/* ===================================
     TRUST SECTION
     ================================= */
.trust-section {
  padding: var(--section-padding);
  background: var(--white);
}

.trust-card {
  text-align: center;
  padding: 2.5rem 2rem;
  background: rgba(37, 99, 235, 0.1);
  border-radius: 16px;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  height: 100%;
  border: 2px solid transparent;
}

.trust-card:hover {
  transform: translateY(-10px) scale(1.05);
  box-shadow: var(--shadow-xl);
  border-color: var(--accent-color);
}

.trust-icon {
  font-size: 3rem;
  margin-bottom: 1.5rem;
  display: block;
  animation: iconBounce 2s ease-in-out infinite;
}

.trust-card p {
  text-align: center;
}

@keyframes iconBounce {
  0%,
  100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-5px);
  }
}

.trust-card h4 {
  color: var(--secondary-color);
  margin-bottom: 1rem;
}

.trust-card p {
  color: var(--gray-600);
  margin: 0;
}

.achievements-section {
  margin-top: 4rem;
  padding-top: 4rem;
  border-top: 2px solid var(--gray-200);
}

.achievement-card {
  text-align: center;
  padding: 1rem;
  background: rgba(245, 158, 11, 0.1);
  border-radius: 12px;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
}

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

.achievement-card img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  margin-bottom: 1rem;
}

.achievement-card h5 {
  color: var(--gray-800);
  font-size: 1rem;
  margin: 0;
}

/* ACHIEVEMENT CARD HIGHLIGHT (ƯU TIÊN MUA SẮM) */
.achievement-card-highlight {
  background: var(--accent-color);
  color: var(--white);
  border-radius: 18px;
  box-shadow: 0 4px 24px rgba(245, 158, 11, 0.15);
  border: none;
  min-height: 90px;
  position: relative;
  overflow: hidden;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  width: 100%;
}

.achievement-icon-check {
  background: rgba(255, 255, 255, 0.18);
  border-radius: 50%;
  width: 56px;
  height: 56px;
  font-size: 2.2rem;
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
}

.achievement-title {
  font-size: 1.15rem;
  color: var(--white);
}

.achievement-desc {
  font-size: 1rem;
  color: var(--white);
  opacity: 0.8;
}

.btn-detail-link {
  background: rgba(255, 255, 255, 0.25);
  color: var(--white);
  font-weight: 600;
  border-radius: 8px;
  padding: 0.6rem 1.2rem;
  border: none;
  transition: background 0.2s, color 0.2s, box-shadow 0.2s;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.08);
  font-size: 1rem;
  text-decoration: none;
}

.btn-detail-link:hover,
.btn-detail-link:focus {
  background: var(--white);
  color: var(--accent-color);
  text-decoration: none;
}

/* ===================================
   NEWS SECTION
   ================================= */
.news-section {
  padding: var(--section-padding);
  background: var(--gray-100);
}

.news-video-wrapper {
  background: var(--white);
  border-radius: 18px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  transition: box-shadow 0.3s;
}
.news-video-wrapper:hover {
  box-shadow: 0 12px 32px rgba(37, 99, 235, 0.18);
}

.news-list {
  gap: 2rem;
}

.news-item {
  background: var(--white);
  border-radius: 14px;
  box-shadow: var(--shadow-md);
  transition: box-shadow 0.3s, transform 0.3s, background 0.3s;
  color: var(--neutral-dark);
  text-decoration: none;
  align-items: center;
}
.news-item:hover {
  background: linear-gradient(
    90deg,
    var(--secondary-color) 10%,
    var(--accent-color) 90%
  );
  color: var(--white);
  box-shadow: var(--shadow-xl);
  transform: translateY(-4px) scale(1.03);
}
.news-item:hover .fa-newspaper {
  color: var(--white) !important;
}
.news-item .fa-newspaper {
  color: var(--secondary-color);
  transition: color 0.3s;
}
.news-item span {
  transition: color 0.3s;
}

/* ===================================
     CLIENTS SECTION
     ================================= */
.clients-section {
  background-color: var(--white);
  overflow: hidden;
  padding: 4rem 0;
}

.clients-carousel {
  position: relative;
  width: 100%;
  overflow: hidden;
  padding: 2rem 0;

  /* Mask gradient: Tạo hiệu ứng fade in/out ở 2 bên */
  mask-image: linear-gradient(
    to right,
    transparent 0%,
    rgba(0, 0, 0, 1) 10%,
    rgba(0, 0, 0, 1) 90%,
    transparent 100%
  );
  -webkit-mask-image: linear-gradient(
    to right,
    transparent 0%,
    rgba(0, 0, 0, 1) 10%,
    rgba(0, 0, 0, 1) 90%,
    transparent 100%
  );
}

.clients-track {
  display: flex;
  animation: scroll 40s linear infinite;
  width: calc(
    200px * var(--number-of-client-logos)
  ); /* Adjust based on number of logos * 2 */
}

.clients-track:hover {
  animation-play-state: paused;
}

.client-logo {
  flex: 0 0 200px;
  padding: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.3s ease;
}

.client-logo:hover {
  transform: scale(1.2);
}

.client-logo img {
  max-width: 100%;
  height: auto;
  filter: grayscale(25%);
  opacity: 0.7;
  transition: all 0.3s ease;
}

.client-logo:hover img {
  filter: grayscale(0%);
  opacity: 1;
}

@keyframes scroll {
  0% {
    transform: translateX(0);
  }
  100% {
    transform: translateX(
      calc(-200px * (var(--number-of-client-logos) / 2))
    ); /* Half of total width */
  }
}

/* ===================================
     FOOTER
     ================================= */
.footer {
  background: var(--neutral-dark);
  color: var(--white);
  position: relative;
}

.footer-logo {
  display: block;
}

.footer-logo {
  padding: 8px;
  background-color: rgba(255, 255, 255, 0.9);
  border-radius: 20px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.footer-heading {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--accent-color);
  font-weight: 600;
  margin-bottom: 1.5rem;
  font-size: 1.2rem;
}

.footer-heading i {
  color: var(--accent-color);
}

.footer-contact-info {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.contact-item i {
  color: var(--primary-color);
  font-size: 1.1rem;
  margin-top: 0.25rem;
}
/* Avatar */
.consultant-avatar {
  width: 150px;
  height: 150px;
  object-fit: cover;
  border-radius: 50%;
  border: 3px solid #fff;
  box-shadow: 0 2px 6px rgba(0,0,0,0.15);
}

/* Info căn giữa theo chiều dọc */
.consultant-info {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

/* QR Code */
.qr-img {
  width: 100px;
  height: 120px;
  object-fit: contain;
}

.qr-label {
  font-size: 0.9rem;
  margin-top: 5px;
  color: #555;
}

/* Card */
.consultant-card {
  background: #f9fcff;
  border-radius: 10px;
  border: 1px solid #e6eef5;
}


.contact-item p {
  margin: 0;
  line-height: 1.5;
}

.contact-item a {
  color: var(--light-text);
  text-decoration: none;
  transition: color 0.3s ease;
}

.contact-item a:hover {
  color: var(--primary-color);
}

.social-links {
  display: flex;
  flex-direction: row;
  gap: 1rem;
  justify-content: flex-start;
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 60px;
  height: 60px;
  color: var(--light-text);
  text-decoration: none;
  transition: all 0.3s ease;
  padding: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.05);
}

.social-link:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--secondary-color);
  transform: translateY(-3px);
}

.social-link img {
  width: 32px;
  height: 32px;
  object-fit: contain;
}

.footer-stats {
  background: rgba(255, 255, 255, 0.05);
  padding: 1rem;
  border-radius: 8px;
}

.stat-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
}

.stat-item:last-child {
  margin-bottom: 0;
}

.stat-item i {
  color: var(--primary-color);
  font-size: 1rem;
}

.stat-item strong {
  color: var(--white);
}

/* ===================================
   MODAL LIÊN HỆ TƯ VẤN
   ================================= */

/* Modal Styles */
.modal-content {
  border-radius: 16px;
  border: none;
  box-shadow: var(--shadow-xl);
}

.modal-header {
  border-bottom: 2px solid var(--gray-200);
  padding: 2rem 2rem 1rem;
}

.modal-title {
  color: var(--primary-color);
  font-weight: 700;
  font-size: 1.5rem;
}

.modal-body {
  padding: 1rem;
}

.modal-footer {
  border-top: 2px solid var(--gray-200);
  padding: 1rem 2rem 2rem;
}

.contact-modal {
  border-radius: 18px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.18);
  background: #fff;
}
.contact-modal-lg {
  max-width: 800px;
  width: 95vw;
}

.consultant-card {
  background: #f4f8fb;
  border-radius: 10px;
  padding: 1.1rem 1rem 0.9rem 1rem;
  margin-bottom: 1.2rem;
  border: 1px solid #e3e8ee;
  box-shadow: 0 2px 8px rgba(36, 99, 235, 0.03);
}
.consultant-avatar img {
  width: 100px;
  height: 100px;
  object-fit: cover;
  border-radius: 50%;
  border: 2px solid #e3e8ee;
  background: #fff;
}
.consultant-info {
  padding-left: 0.5rem;
  padding-right: 0.5rem;
}
.consultant-name {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: 0.15rem;
}
.consultant-title {
  color: var(--gray-600);
  font-size: 1rem;
  margin-bottom: 0.5rem;
  font-weight: 500;
}
.consultant-contacts {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}
.contact-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--gray-700);
  text-decoration: none;
  padding: 0.18rem 0.5rem;
  border-radius: 6px;
  transition: background 0.2s, color 0.2s;
}
.contact-link:hover {
  color: var(--secondary-color);
}
.contact-link i {
  font-size: 1.1rem;
  width: 18px;
  text-align: center;
}
.consultant-qr {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
  margin-top: 0.2rem;
}
.qr-img {
  width: 125px;
  height: 125px;
  border-radius: 6px;
  background: var(--white);
  border: 1px solid #e3e8ee;
  object-fit: contain;
}
.qr-label {
  font-size: 1rem;
  color: var(--gray-600);
  margin-top: 0.1rem;
}

/* ===================================
     SCROLL TO TOP BUTTON
     ================================= */
.scroll-to-top {
  position: fixed;
  right: 2rem;
  bottom: 2rem;
  z-index: 999;
  width: 48px;
  height: 48px;
  border: none;
  border-radius: 50%;
  background: linear-gradient(
    135deg,
    var(--primary-color) 60%,
    var(--secondary-color) 100%
  );
  color: #fff;
  font-size: 1.5rem;
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s, transform 0.3s;
}
.scroll-to-top.show {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}
.scroll-to-top:hover {
  background: linear-gradient(135deg, #1e40af 60%, #0ea5e9 100%);
  transform: translateY(-4px) scale(1.08);
}

/* ===================================
     RESPONSIVE DESIGN
     ================================= */
@media (max-width: 1200px) {
  .footer .col-xl-5 {
    text-align: center;
  }

  .footer .footer-brand {
    display: flex;
    flex-direction: column;
    align-items: center;
  }

  .footer .footer-contact-info {
    align-items: center;
  }

  .footer .contact-item {
    justify-content: center;
  }
}

@media (max-width: 992px) {
  .hero-buttons {
    justify-content: center;
  }

  .hero-buttons .btn {
    flex: 1;
    min-width: 200px;
  }

  .model-controls {
    margin-bottom: 2rem;
  }

  .model-btn {
    padding: 1rem;
  }

  .features-group {
    margin-top: 2rem;
  }

  .news-section .row.align-items-center {
    flex-direction: column;
  }
  .news-video-wrapper {
    margin-bottom: 2rem;
  }
}

@media (max-width: 768px) {
  :root {
    --section-padding: 3rem 0;
  }

  .hero-section {
    text-align: center;
    padding-top: 100px;
  }

  .hero-container {
    padding: 1rem;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .hero-buttons .btn {
    width: 100%;
    max-width: 300px;
  }

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

  .model-controls {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.5rem;
  }

  .model-btn {
    padding: 1rem;
    font-size: 0.875rem;
  }

  .feature-card {
    padding: 1.25rem;
    gap: 1rem;
  }

  .feature-icon-lg {
    width: 3rem;
    height: 3rem;
    font-size: 1.25rem;
  }

  .chart-container {
    height: 300px;
  }

  .achievement-card {
    padding: 1rem 4rem;
  }
  .achievement-card-highlight {
    flex-direction: column !important;
    align-items: flex-start !important;
    padding: 1.2rem 1rem;
  }
  .btn-detail-link {
    width: 100%;
    justify-content: center;
    margin-top: 1rem;
  }
  .achievement-title {
    font-size: 1rem;
  }
  .achievement-desc {
    font-size: 0.95rem;
  }

  .client-logo {
    flex: 0 0 150px;
  }

  .clients-track {
    width: calc(150px * var(--number-of-client-logos));
  }

  .consultant-info {
    flex-direction: column;
    text-align: center;
  }

  .consultant-contact {
    align-items: center;
  }

  .consultant-contact a {
    width: 100%;
    justify-content: center;
  }

  .consultant-qr {
    padding-left: 0;
    padding-top: 1.5rem;
    border-left: none;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
  }

  .modal-header,
  .modal-body,
  .modal-footer {
    padding-left: 1rem;
    padding-right: 1rem;
  }
  .contact-modal-lg {
    max-width: 98vw;
    width: 98vw;
  }
  .consultant-card {
    padding: 0.9rem 0.7rem 0.7rem 0.7rem;
  }
  .consultant-avatar img {
    width: 100px;
    height: 100px;
  }
  .qr-img {
    width: 120px;
    height: 120px;
  }
  .consultant-qr {
    margin-top: 0.7rem;
    margin-bottom: 0.2rem;
    justify-content: center;
  }
  .row > .consultant-qr {
    order: 3;
  }
}

@media (max-width: 576px) {
  .consultant-card .row {
    flex-direction: column !important;
    align-items: center !important;
    text-align: center !important;
    gap: 0.5rem;
  }
  .consultant-avatar,
  .consultant-info,
  .consultant-qr {
    width: 100% !important;
    max-width: 100% !important;
    margin-bottom: 0.5rem !important;
    padding: 0 !important;
  }
  .consultant-avatar img,
  .qr-img {
    width: 70px !important;
    height: 70px !important;
    margin: 0 auto !important;
  }
  .consultant-name {
    font-size: 1rem !important;
  }
  .consultant-title {
    font-size: 0.95rem !important;
  }
  .consultant-contacts {
    gap: 0.1rem !important;
  }
  .contact-link {
    font-size: 0.95rem !important;
    padding: 0.2rem 0.5rem !important;
    width: 100%;
    justify-content: center;
  }
  .qr-label {
    font-size: 0.85rem !important;
  }
  .modal-content.contact-modal {
    padding: 0.5rem !important;
  }
}

/* =========================
   BỔ SUNG RESPONSIVE CHO MOBILE & TABLET
   ========================= */

/* Điều chỉnh padding cho section trên mobile */
@media (max-width: 480px) {
  .hero-section,
  .about-section,
  .model-section,
  .features-section,
  .benefits-section,
  .trust-section,
  .news-section,
  .clients-section,
  .security-support-section {
    padding: 1.2rem 0 !important;
  }
  .section-title {
    font-size: 1.1rem !important;
    margin-bottom: 1rem !important;
  }
  .hero-title {
    font-size: 1.3rem !important;
  }
  .hero-subtitle {
    font-size: 1rem !important;
  }
  .hero-description {
    font-size: 0.95rem !important;
    max-width: 100%;
  }
  .stat-number {
    font-size: 1.5rem !important;
  }
  .stat-label {
    font-size: 0.95rem !important;
  }
  .feature-card,
  .benefit-card,
  .trust-card {
    padding: 1rem 0.5rem !important;
    font-size: 0.98rem;
  }
  .feature-icon-lg,
  .trust-icon,
  .benefit-icon {
    font-size: 2rem !important;
  }
  .achievement-card img,
  .achievement-card {
    max-width: 100%;
    height: auto !important;
    padding: 0.5rem !important;
  }
  .achievement-card-highlight {
    flex-direction: column !important;
    padding: 0.7rem 0.3rem !important;
    font-size: 0.95rem;
  }
  .clients-carousel {
    padding: 0.5rem 0 !important;
  }
  .client-logo {
    flex: 0 0 90px !important;
    padding: 0.3rem !important;
  }
  .clients-track {
    width: calc(90px * var(--number-of-client-logos)) !important;
    min-width: unset !important;
  }
  .modal-content {
    padding: 0.5rem !important;
  }
  .consultant-avatar img,
  .qr-img {
    width: 70px !important;
    height: 70px !important;
  }
  .consultant-name {
    font-size: 1rem !important;
  }
  .consultant-title {
    font-size: 0.95rem !important;
  }
  .contact-link {
    font-size: 0.98rem !important;
  }
  .footer {
    padding: 1rem 0 !important;
  }
  .footer-heading {
    font-size: 1rem !important;
  }
  .footer-stats,
  .footer-contact-info,
  .stat-item,
  .contact-item,
  .footer .copyright {
    font-size: 12px !important;
  }
  .footer .footer-brand p {
    font-size: 14px !important;
    text-align: center !important;
    white-space: normal !important;
    word-break: break-word !important;
    line-height: 1.3 !important;
    padding-left: 4px;
    padding-right: 4px;
  }
  .footer .footer-brand img {
    width: 120px !important;
    height: auto !important;
    border-radius: 18px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
  }
  .footer .social-link img {
    width: 24px !important;
    height: 24px !important;
  }
}

/* Điều chỉnh layout cho tablet */
@media (max-width: 768px) {
  .hero-section {
    min-height: unset;
    padding-top: 90px;
  }
  .hero-container {
    flex-direction: column;
    padding: 0.5rem !important;
  }
  .hero-image {
    width: 100% !important;
    height: auto !important;
    max-width: 350px;
    margin: 0 auto;
  }
  .model-display {
    min-height: 260px !important;
    padding: 0.5rem !important;
  }
  .model-content {
    padding: 0.5rem !important;
  }
  .dashboard-charts {
    padding: 10px !important;
  }
  .chart-container {
    height: 180px !important;
  }
  .news-video-wrapper iframe {
    min-height: 180px !important;
    height: 180px !important;
  }
  .achievement-card img {
    height: 120px !important;
    width: 100% !important;
    object-fit: contain;
  }
}

/* Điều chỉnh cho laptop nhỏ */
@media (max-width: 1024px) {
  .hero-title {
    font-size: 2rem;
  }
  .section-title {
    font-size: 1.5rem;
  }
  .feature-card,
  .benefit-card,
  .trust-card {
    font-size: 1rem;
  }
  .clients-track {
    width: calc(120px * var(--number-of-client-logos));
  }
  .client-logo {
    flex: 0 0 120px;
  }
}

/* Ẩn một số hình ảnh lớn trên mobile nếu cần */
@media (max-width: 480px) {
  .about-section img,
  .model-content img {
    display: none !important;
  }
}

/* Đảm bảo các hàng không bị tràn chiều ngang */
.row {
  flex-wrap: wrap;
}

/* Đảm bảo các bảng, biểu đồ không bị tràn */
.dashboard-charts,
.chart-container,
.news-video-wrapper {
  max-width: 100vw !important;
  overflow-x: auto;
}

/* ===================================
     ANIMATIONS & UTILITIES
     ================================= */
.fade-in {
  opacity: 0;
  animation: fadeIn 0.6s ease forwards;
}

@keyframes fadeIn {
  to {
    opacity: 1;
  }
}

.slide-up {
  transform: translateY(30px);
  opacity: 0;
  animation: slideUp 0.6s ease forwards;
}

@keyframes slideUp {
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.scale-in {
  transform: scale(0.9);
  opacity: 0;
  animation: scaleIn 0.6s ease forwards;
}

@keyframes scaleIn {
  to {
    transform: scale(1);
    opacity: 1;
  }
}

/* Smooth scrolling */
html {
  scroll-behavior: smooth;
}

/* Custom scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--gray-100);
}

::-webkit-scrollbar-thumb {
  background: var(--primary-color);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: #1d4ed8;
}

/* Focus styles for accessibility */
.btn:focus,
.nav-link:focus,
.model-btn:focus {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
}

/* Print styles */
@media print {
  .navbar,
  .modal {
    display: none !important;
  }

  .hero-section {
    min-height: auto;
    padding: 2rem 0;
  }

  * {
    box-shadow: none !important;
  }
}

html,
body {
  max-width: 100vw;
  overflow-x: hidden;
}

.footer,
.clients-section,
.clients-carousel,
.clients-track,
.row {
  max-width: 100vw !important;
  overflow-x: hidden !important;
  margin-right: 0 !important;
}

@media (max-width: 480px) {
  .clients-track {
    width: calc(90px * var(--number-of-client-logos)) !important;
    min-width: unset !important;
  }
  .client-logo {
    min-width: 0 !important;
    max-width: 100vw !important;
  }
  .footer {
    padding-left: 0 !important;
    padding-right: 0 !important;
  }
  .row {
    margin-left: 0 !important;
    margin-right: 0 !important;
  }
}

/* Responsive images: luôn co giãn đúng tỉ lệ, không bị méo, rõ nét */
img,
.img-fluid {
  max-width: 100%;
  height: auto;
  object-fit: contain;
  image-rendering: auto;
  display: block;
}

/* Đảm bảo hình ảnh trong các card, carousel, modal, ... không bị tràn hoặc méo */
.achievement-card img,
.model-content img,
.feature-card img,
.benefit-card img,
.trust-card img,
.client-logo img,
.consultant-avatar img,
.qr-img {
  max-width: 100%;
  height: auto;
  object-fit: contain;
  border-radius: 8px;
  display: block;
}

/* Đảm bảo hình ảnh lớn ở hero section co giãn hợp lý trên mobile */
@media (max-width: 768px) {
  .hero-image {
    width: 100% !important;
    max-width: 350px !important;
    height: auto !important;
    margin: 0 auto;
    object-fit: contain;
  }
}

/* Đảm bảo hình ảnh không bị ẩn hoàn toàn trên mobile nếu cần hiển thị */
@media (max-width: 480px) {
  .about-section img,
  .model-content img {
    display: block !important;
    max-width: 100% !important;
    height: auto !important;
    object-fit: contain !important;
  }
}

/* Footer layout 6-3-3, căn giữa trên mobile */
@media (max-width: 991.98px) {
  .footer .row.align-items-start {
    flex-direction: column !important;
    align-items: center !important;
    text-align: center !important;
    gap: 2rem;
  }
  .footer .footer-brand,
  .footer .footer-contact-info,
  .footer .footer-stats,
  .footer .footer-heading {
    align-items: center !important;
    text-align: center !important;
    justify-content: center !important;
    margin-left: auto !important;
    margin-right: auto !important;
  }
  .footer .footer-stats {
    min-width: unset !important;
  }
  .footer .footer-logo {
    margin-left: auto;
    margin-right: auto;
  }
}