/* Reset và Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary-color: #FF9F1C;
  --primary-dark: #E08A1A;
  --secondary-color: #1A1A1A;
  --tertiary-color: #007AFF;
  --tertiary-dark: #0056CC;
  --light-color: #FFF9F2;
  --dark-color: #1A1A1A;
  --gray-color: #666;
  --light-gray: #F5F5F5;
  --white: #FFFFFF;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  --shadow-hover: 0 15px 40px rgba(0, 0, 0, 0.15);
  --border-radius: 16px;
  --transition: all 0.3s ease;
}

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--light-color);
  color: var(--dark-color);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
}

.container {
  width: 100%;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Banner Section - Chiếm 50% màn hình desktop */
.banner-section {
  background: linear-gradient(135deg, #FF9F1C 0%, #FF6B35 100%);
  min-height: 50vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: 40px 20px;
  color: white;
  overflow: hidden;
}

.banner-overlay {
  max-width: 1200px;
  width: 100%;
  text-align: center;
  position: relative;
  z-index: 2;
}

/* Logo Container */
.logo-container {
  margin-bottom: 30px;
  animation: fadeInDown 0.8s ease-out;
}

.logo-icon {
  font-size: 80px;
  margin-bottom: 10px;
  filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.2));
}

.logo-text {
  font-size: 60px;
  font-weight: 900;
  letter-spacing: -1px;
}

/* Tagline Container */
.tagline-container {
  margin-bottom: 40px;
  animation: fadeInUp 0.8s ease-out 0.2s both;
}

.tagline {
  font-size: 42px;
  font-weight: 800;
  margin-bottom: 10px;
  letter-spacing: -0.5px;
}

.sub-tagline {
  font-size: 22px;
  font-weight: 500;
  opacity: 0.95;
}

/* Stats Container */
.stats-container {
  display: flex;
  justify-content: center;
  gap: 60px;
  margin-top: 40px;
  animation: fadeInUp 0.8s ease-out 0.4s both;
}

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

.stat-number {
  font-size: 42px;
  font-weight: 800;
  margin-bottom: 5px;
}

.stat-label {
  font-size: 16px;
  opacity: 0.9;
  font-weight: 500;
}

/* Content Section */
.content-section {
  flex: 1;
  padding: 60px 20px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.content-wrapper {
  max-width: 1200px;
  width: 100%;
}

.section-title {
  font-size: 42px;
  font-weight: 800;
  text-align: center;
  margin-bottom: 20px;
  color: var(--dark-color);
  position: relative;
}

.section-title::after {
  content: '';
  display: block;
  width: 80px;
  height: 4px;
  background: var(--primary-color);
  margin: 15px auto 30px;
  border-radius: 2px;
}

.section-description {
  font-size: 18px;
  text-align: center;
  max-width: 800px;
  margin: 0 auto 60px;
  color: var(--gray-color);
  line-height: 1.8;
}

/* Action Buttons - Xếp thẳng hàng */
.action-buttons {
  display: flex;
  justify-content: center;
  gap: 30px;
  margin-bottom: 80px;
  flex-wrap: wrap;
}

.action-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-decoration: none;
  background: var(--white);
  border-radius: var(--border-radius);
  padding: 30px;
  width: 280px;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border: 2px solid transparent;
  position: relative;
  overflow: hidden;
}

.action-btn:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-hover);
}

.action-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  border-radius: var(--border-radius) var(--border-radius) 0 0;
}

.btn-primary::before {
  background: var(--primary-color);
}

.btn-secondary::before {
  background: var(--secondary-color);
}

.btn-tertiary::before {
  background: var(--tertiary-color);
}

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

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

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

.btn-icon {
  font-size: 48px;
  margin-bottom: 20px;
  height: 80px;
  width: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: var(--transition);
}

.btn-primary .btn-icon {
  color: var(--primary-color);
  background-color: rgba(255, 159, 28, 0.1);
}

.btn-secondary .btn-icon {
  color: var(--secondary-color);
  background-color: rgba(26, 26, 26, 0.1);
}

.btn-tertiary .btn-icon {
  color: var(--tertiary-color);
  background-color: rgba(0, 122, 255, 0.1);
}

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

.btn-title {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--dark-color);
}

.btn-subtitle {
  font-size: 16px;
  color: var(--gray-color);
}

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
  margin-bottom: 80px;
}

.feature-card {
  background: var(--white);
  border-radius: var(--border-radius);
  padding: 40px 30px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border: 1px solid rgba(0, 0, 0, 0.05);
}

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

.feature-icon {
  font-size: 48px;
  color: var(--primary-color);
  margin-bottom: 25px;
  height: 80px;
  width: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(255, 159, 28, 0.1);
  border-radius: 50%;
  margin: 0 auto 25px;
}

.feature-title {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 15px;
  color: var(--dark-color);
}

.feature-description {
  font-size: 16px;
  color: var(--gray-color);
  line-height: 1.6;
}

/* Testimonials Section */
.testimonials-section {
  margin-bottom: 80px;
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  max-width: 900px;
  margin: 0 auto;
}

.testimonial-card {
  background: var(--white);
  border-radius: var(--border-radius);
  padding: 30px;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

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

.testimonial-text {
  font-size: 18px;
  font-style: italic;
  color: var(--dark-color);
  margin-bottom: 25px;
  line-height: 1.6;
  position: relative;
  padding-left: 20px;
}

.testimonial-text::before {
  content: '"';
  font-size: 60px;
  color: var(--primary-color);
  position: absolute;
  left: -10px;
  top: -20px;
  opacity: 0.3;
  font-family: Georgia, serif;
}

.testimonial-author {
  display: flex;
  align-items: center;
}

.author-avatar {
  width: 50px;
  height: 50px;
  background: var(--primary-color);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 18px;
  margin-right: 15px;
}

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

.author-name {
  font-weight: 700;
  font-size: 18px;
  color: var(--dark-color);
}

.author-role {
  font-size: 14px;
  color: var(--gray-color);
}

/* Footer */
.footer-section {
  background: var(--secondary-color);
  color: white;
  padding: 40px 20px;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
}

.footer-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 30px;
}

.footer-logo-icon {
  font-size: 36px;
  margin-right: 15px;
}

.footer-logo-text {
  font-size: 32px;
  font-weight: 800;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 30px;
  margin-bottom: 30px;
  flex-wrap: wrap;
}

.footer-link {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  font-size: 16px;
  transition: var(--transition);
}

.footer-link:hover {
  color: var(--primary-color);
}

.footer-copyright {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
}

/* Animations */
@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Responsive Styles */

/* Tablet */
@media (max-width: 1024px) {
  .logo-text {
    font-size: 50px;
  }
  
  .tagline {
    font-size: 36px;
  }
  
  .sub-tagline {
    font-size: 20px;
  }
  
  .action-buttons {
    gap: 20px;
  }
  
  .action-btn {
    width: 240px;
    padding: 25px;
  }
}

/* Tablet nhỏ và Mobile lớn */
@media (max-width: 768px) {
  .banner-section {
    min-height: 40vh;
    padding: 30px 20px;
  }
  
  .logo-icon {
    font-size: 60px;
  }
  
  .logo-text {
    font-size: 42px;
  }
  
  .tagline {
    font-size: 30px;
  }
  
  .sub-tagline {
    font-size: 18px;
  }
  
  .stats-container {
    gap: 40px;
    flex-wrap: wrap;
  }
  
  .stat-number {
    font-size: 36px;
  }
  
  .section-title {
    font-size: 36px;
  }
  
  .action-buttons {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
  }
  
  .action-btn {
    width: 100%;
    max-width: 300px;
    flex-direction: row;
    text-align: left;
    padding: 20px;
  }
  
  .btn-icon {
    margin-bottom: 0;
    margin-right: 20px;
    height: 60px;
    width: 60px;
    font-size: 32px;
  }
  
  .btn-content {
    text-align: left;
  }
  
  .features-grid {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  }
}

/* Mobile */
@media (max-width: 480px) {
  .banner-section {
    min-height: 35vh;
    padding: 20px 15px;
  }
  
  .logo-icon {
    font-size: 50px;
  }
  
  .logo-text {
    font-size: 36px;
  }
  
  .tagline {
    font-size: 26px;
  }
  
  .sub-tagline {
    font-size: 16px;
  }
  
  .stats-container {
    gap: 30px;
  }
  
  .stat-item {
    flex: 1;
    min-width: 100px;
  }
  
  .stat-number {
    font-size: 28px;
  }
  
  .stat-label {
    font-size: 14px;
  }
  
  .content-section {
    padding: 40px 15px;
  }
  
  .section-title {
    font-size: 30px;
  }
  
  .section-description {
    font-size: 16px;
    margin-bottom: 40px;
  }
  
  .action-buttons {
    gap: 15px;
    margin-bottom: 50px;
  }
  
  .action-btn {
    max-width: 100%;
    padding: 15px;
  }
  
  .btn-icon {
    height: 50px;
    width: 50px;
    font-size: 28px;
    margin-right: 15px;
  }
  
  .btn-title {
    font-size: 20px;
  }
  
  .btn-subtitle {
    font-size: 14px;
  }
  
  .feature-card {
    padding: 30px 20px;
  }
  
  .feature-icon {
    font-size: 36px;
    height: 70px;
    width: 70px;
  }
  
  .feature-title {
    font-size: 20px;
  }
  
  .feature-description {
    font-size: 15px;
  }
  
  .testimonial-card {
    padding: 20px;
  }
  
  .testimonial-text {
    font-size: 16px;
  }
  
  .footer-links {
    flex-direction: column;
    gap: 15px;
  }
  
  .footer-logo {
    flex-direction: column;
  }
  
  .footer-logo-icon {
    margin-right: 0;
    margin-bottom: 10px;
  }
}

.footer-copyright {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}