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

:root {
  --primary: #0a2540;
  --primary-light: #1a3a5c;
  --accent: #1a73e8;
  --accent-hover: #1557b0;
  --white: #ffffff;
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 40px rgba(0,0,0,0.12);
  --radius: 12px;
  --transition: 0.3s ease;
}

html {
  scroll-behavior: smooth;
  height: 100%;
  width: 100%;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--gray-700);
  line-height: 1.7;
  overflow-x: hidden;
  background: var(--white);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

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

ul {
  list-style: none;
}

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

h1, h2, h3, h4 {
  color: var(--primary);
  line-height: 1.2;
}

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: all var(--transition);
}

.navbar.scrolled {
  border-bottom-color: var(--gray-200);
  box-shadow: var(--shadow-sm);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary);
}

.logo span {
  color: var(--accent);
}

.nav-links {
  display: flex;
  gap: 32px;
}

.nav-links a {
  font-size: 0.925rem;
  font-weight: 500;
  color: var(--gray-600);
  position: relative;
  padding: 4px 0;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.dropdown {
  position: relative;
}

.dropdown-toggle {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.dropdown-arrow {
  transition: transform var(--transition);
  margin-top: 1px;
}

.dropdown:hover .dropdown-arrow,
.dropdown.open .dropdown-arrow {
  transform: rotate(180deg);
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + 12px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  min-width: 220px;
  padding: 8px 0;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition);
  z-index: 100;
  flex-direction: column;
  gap: 0;
}

.dropdown-menu::before {
  content: '';
  position: absolute;
  top: -8px;
  left: 50%;
  transform: translateX(-50%);
  border-left: 8px solid transparent;
  border-right: 8px solid transparent;
  border-bottom: 8px solid var(--white);
}

.dropdown-menu::after {
  content: '';
  position: absolute;
  top: -20px;
  left: 0;
  right: 0;
  height: 20px;
}

.dropdown:hover .dropdown-menu,
.dropdown.open .dropdown-menu {
  opacity: 1;
  visibility: visible;
}

.dropdown-menu li {
  width: 100%;
}

.dropdown-menu a {
  display: block;
  padding: 10px 20px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--gray-600);
  transition: all var(--transition);
  white-space: nowrap;
}

.dropdown-menu a::after {
  display: none;
}

.dropdown-menu a:hover {
  background: var(--gray-50);
  color: var(--accent);
  padding-left: 24px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--primary);
  transition: all var(--transition);
  border-radius: 2px;
}

.btn {
  display: inline-block;
  padding: 14px 32px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: all var(--transition);
  border: none;
  font-family: inherit;
}

.btn-primary {
  background: var(--accent);
  color: var(--white);
  box-shadow: 0 4px 14px rgba(26,115,232,0.4);
}

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(26,115,232,0.5);
}

.btn-full {
  width: 100%;
  text-align: center;
}

.hero {
  padding: 160px 0 100px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 50%, #0f3460 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(26,115,232,0.15) 0%, transparent 70%);
  border-radius: 50%;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(26,115,232,0.1) 0%, transparent 70%);
  border-radius: 50%;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 800;
  color: var(--white);
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: rgba(255,255,255,0.8);
  margin-bottom: 40px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 48px;
  margin-top: 64px;
  padding-top: 40px;
  border-top: 1px solid rgba(255,255,255,0.15);
}

.stat strong {
  display: block;
  font-size: 2rem;
  font-weight: 800;
  color: var(--white);
}

.stat span {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.6);
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-header.left {
  text-align: left;
}

.section-header h2 {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.section-header p {
  font-size: 1.1rem;
  color: var(--gray-500);
  max-width: 500px;
  margin: 0 auto;
}

.section-header.left p {
  margin: 0;
}

.services {
  padding: 100px 0;
  background: var(--gray-50);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.service-card {
  background: var(--white);
  padding: 40px 32px;
  border-radius: var(--radius);
  border: 1px solid var(--gray-200);
  transition: all var(--transition);
}

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

.service-icon {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, var(--accent), #4dabf7);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  margin-bottom: 24px;
}

.service-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.service-card p {
  color: var(--gray-500);
  font-size: 0.95rem;
  line-height: 1.7;
}

.btn-link {
  display: inline-block;
  margin-top: 16px;
  font-size: 0.925rem;
  font-weight: 600;
  color: var(--accent);
  transition: all var(--transition);
}

.btn-link:hover {
  color: var(--accent-hover);
  letter-spacing: 0.5px;
}

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

.about {
  padding: 100px 0;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.about-text {
  color: var(--gray-600);
  margin-bottom: 16px;
  font-size: 1rem;
}

.about-features {
  margin-top: 32px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.about-feature {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--primary);
  font-weight: 500;
  font-size: 0.95rem;
}

.about-feature svg {
  color: var(--accent);
  flex-shrink: 0;
}

.about-visual {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.about-card {
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  transition: all var(--transition);
}

.about-card:hover {
  background: var(--primary);
  border-color: var(--primary);
}

.about-card:hover strong,
.about-card:hover span {
  color: var(--white);
}

.about-card strong {
  display: block;
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--accent);
  margin-bottom: 4px;
  transition: color var(--transition);
}

.about-card span {
  font-size: 0.875rem;
  color: var(--gray-500);
  transition: color var(--transition);
}

.portfolio {
  padding: 100px 0;
  background: var(--gray-50);
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.portfolio-card {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--gray-200);
  transition: all var(--transition);
}

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

.portfolio-image {
  height: 200px;
  display: flex;
  align-items: flex-end;
  padding: 24px;
  position: relative;
}

.portfolio-overlay h3 {
  color: var(--white);
  font-size: 1.25rem;
  margin-bottom: 4px;
}

.portfolio-overlay span {
  color: rgba(255,255,255,0.75);
  font-size: 0.875rem;
}

.portfolio-info {
  padding: 24px;
}

.portfolio-result {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 8px;
}

.portfolio-info p:last-child {
  color: var(--gray-500);
  font-size: 0.925rem;
}

.contact {
  padding: 100px 0;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.contact-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.contact-item svg {
  color: var(--accent);
  flex-shrink: 0;
  margin-top: 2px;
}

.contact-item h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.contact-item p {
  color: var(--gray-500);
  font-size: 0.925rem;
}

.social-links {
  display: flex;
  gap: 12px;
  margin-top: 8px;
}

.social-link {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--gray-100);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gray-600);
  transition: all var(--transition);
}

.social-link:hover {
  background: var(--accent);
  color: var(--white);
}

.contact-form {
  background: var(--gray-50);
  padding: 40px;
  border-radius: var(--radius);
  border: 1px solid var(--gray-200);
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--gray-300);
  border-radius: 8px;
  font-size: 0.95rem;
  font-family: inherit;
  transition: all var(--transition);
  background: var(--white);
  color: var(--gray-700);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(26,115,232,0.15);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--gray-300);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-success {
  display: none;
  text-align: center;
  padding: 40px;
}

.form-success.show {
  display: block;
}

.form-success h3 {
  color: var(--accent);
  margin-bottom: 8px;
}

.footer {
  background: var(--primary);
  padding: 64px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-brand .logo {
  color: var(--white);
  display: inline-block;
  margin-bottom: 16px;
}

.footer-brand p {
  color: rgba(255,255,255,0.5);
  font-size: 0.925rem;
  line-height: 1.7;
  max-width: 300px;
}

.footer-links h4,
.footer-contact h4 {
  color: var(--white);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 20px;
}

.footer-links ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links a {
  color: rgba(255,255,255,0.5);
  font-size: 0.9rem;
  transition: color var(--transition);
}

.footer-links a:hover {
  color: var(--white);
}

.footer-contact p {
  color: rgba(255,255,255,0.5);
  font-size: 0.9rem;
  margin-bottom: 8px;
}

.footer-bottom {
  padding: 24px 0;
  text-align: center;
}

.footer-bottom p {
  color: rgba(255,255,255,0.4);
  font-size: 0.85rem;
}

.animate-fade-up {
  opacity: 0;
  transform: translateY(30px);
  animation: fadeUp 0.8s ease forwards;
}

.delay-1 { animation-delay: 0.15s; }
.delay-2 { animation-delay: 0.3s; }
.delay-3 { animation-delay: 0.45s; }

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

.scroll-animate {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s ease;
}

.scroll-animate.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1024px) {
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--white);
    flex-direction: column;
    padding: 24px;
    gap: 0;
    border-bottom: 1px solid var(--gray-200);
    box-shadow: var(--shadow-md);
    transform: translateY(-120%);
    transition: transform var(--transition);
  }

  .nav-links.open {
    transform: translateY(0);
  }

  .nav-links li a {
    display: block;
    padding: 12px 0;
  }

  .dropdown-menu {
    position: static;
    transform: none;
    box-shadow: none;
    border: none;
    border-radius: 0;
    min-width: 0;
    padding: 0;
    max-height: 0;
    overflow: hidden;
    opacity: 1;
    visibility: visible;
    transition: max-height 0.35s ease;
    background: var(--gray-50);
    border-radius: 8px;
    margin-top: 4px;
  }

  .dropdown-menu::before,
  .dropdown-menu::after {
    display: none;
  }

  .dropdown:hover .dropdown-menu {
    max-height: 0;
    opacity: 1;
    visibility: visible;
  }

  .dropdown.open .dropdown-menu {
    max-height: 300px;
    padding: 4px 0;
  }

  .dropdown-menu a {
    padding: 8px 20px;
    font-size: 0.85rem;
  }

  .dropdown-menu a:hover {
    padding-left: 24px;
  }

  .hero {
    padding: 130px 0 80px;
  }

  .hero h1 {
    font-size: 2.25rem;
  }

  .hero-subtitle {
    font-size: 1.05rem;
  }

  .hero-stats {
    flex-direction: column;
    gap: 24px;
    align-items: center;
  }

  .section-header h2 {
    font-size: 2rem;
  }

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

  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .about-features {
    grid-template-columns: 1fr;
  }

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

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .contact-form {
    padding: 24px;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 1.85rem;
  }

  .hero-subtitle {
    font-size: 0.95rem;
  }

  .btn {
    padding: 12px 24px;
    font-size: 0.925rem;
  }

  .section-header h2 {
    font-size: 1.75rem;
  }

  .service-card {
    padding: 28px 24px;
  }
}

.page-hero {
  padding: 130px 0 60px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 50%, #0f3460 100%);
  position: relative;
  overflow: hidden;
  text-align: center;
}

.page-hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(26,115,232,0.15) 0%, transparent 70%);
  border-radius: 50%;
}

.page-hero h1 {
  font-size: 2.75rem;
  font-weight: 800;
  color: var(--white);
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.page-hero p {
  font-size: 1.15rem;
  color: rgba(255,255,255,0.75);
  max-width: 600px;
  margin: 0 auto;
}

.service-detail {
  padding: 80px 0 100px;
}

.detail-grid {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 48px;
  align-items: start;
}

.detail-content h2 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 20px;
  margin-top: 48px;
}

.detail-content h2:first-child {
  margin-top: 0;
}

.detail-content > p {
  color: var(--gray-600);
  font-size: 1rem;
  line-height: 1.8;
  margin-bottom: 16px;
}

.detail-features {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.detail-feature-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.detail-feature-item svg {
  color: var(--accent);
  flex-shrink: 0;
  margin-top: 4px;
}

.detail-feature-item strong {
  display: block;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 6px;
}

.detail-feature-item p {
  color: var(--gray-500);
  font-size: 0.925rem;
  line-height: 1.7;
}

.process-steps {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.process-step {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.step-number {
  width: 44px;
  height: 44px;
  min-width: 44px;
  background: linear-gradient(135deg, var(--accent), #4dabf7);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: 1.1rem;
  font-weight: 700;
}

.process-step strong {
  display: block;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 6px;
}

.process-step p {
  color: var(--gray-500);
  font-size: 0.925rem;
  line-height: 1.7;
}

.detail-sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
  position: sticky;
  top: 96px;
}

.sidebar-card {
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 32px 28px;
}

.sidebar-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 20px;
}

.sidebar-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 24px;
}

.sidebar-list li {
  position: relative;
  padding-left: 20px;
  font-size: 0.925rem;
  color: var(--gray-600);
  line-height: 1.6;
}

.sidebar-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
}

.sidebar-links li::before {
  display: none;
}

.sidebar-links li {
  padding-left: 0;
}

.sidebar-links a {
  color: var(--accent);
  font-weight: 500;
  transition: color var(--transition);
}

.sidebar-links a:hover {
  color: var(--accent-hover);
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}

.team-card {
  background: var(--white);
  padding: 32px 24px;
  border-radius: var(--radius);
  border: 1px solid var(--gray-200);
  text-align: center;
  transition: all var(--transition);
}

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

.team-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  color: var(--white);
  font-size: 1.25rem;
  font-weight: 700;
}

.team-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.team-role {
  color: var(--accent);
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.team-bio {
  color: var(--gray-500);
  font-size: 0.9rem;
  line-height: 1.6;
}

@media (max-width: 1024px) {
  .team-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .team-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 1024px) {
  .detail-grid {
    grid-template-columns: 1fr 320px;
    gap: 36px;
  }
}

@media (max-width: 768px) {
  .page-hero {
    padding: 110px 0 48px;
  }

  .page-hero h1 {
    font-size: 2rem;
  }

  .page-hero p {
    font-size: 1rem;
  }

  .service-detail {
    padding: 48px 0 64px;
  }

  .detail-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .detail-sidebar {
    position: static;
  }

  .detail-content h2 {
    font-size: 1.5rem;
    margin-top: 36px;
  }
}