:root {
  --color-primary: #1f4e79;
  --color-secondary: #f0a500;
  --color-accent: #1089ff;
  --color-bg: #f5f7fa;
  --color-dark: #1a1a1a;
  --color-muted: #6b7280;
  --font-heading: "Urbanist", "Segoe UI", sans-serif;
  --font-body: "Prompt", "Noto Sans Thai", sans-serif;
  --max-width: 1200px;
  --radius-lg: 18px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --shadow-soft: 0 18px 50px rgba(19, 74, 126, 0.12);
  --shadow-card: 0 12px 24px rgba(13, 35, 58, 0.12);
}

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

html,
body {
  margin: 0;
  padding: 0;
  font-family: var(--font-body);
  color: var(--color-dark);
  background-color: var(--color-bg);
  scroll-behavior: smooth;
}

body {
  line-height: 1.6;
}

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

a {
  color: inherit;
  text-decoration: none;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 999;
  background-color: rgba(255, 255, 255, 0.95);
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.05);
  backdrop-filter: blur(8px);
}

.top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 16px 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand img {
  width: 64px;
  height: auto;
}

.brand-name {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.tagline {
  margin: 0;
  font-size: 0.85rem;
  color: var(--color-muted);
}

.lang-switch {
  display: flex;
  gap: 8px;
}

.lang-btn {
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  background-color: transparent;
  color: var(--color-dark);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease-in;
}

.lang-btn.active,
.lang-btn:hover {
  background-color: var(--color-primary);
  color: #fff;
}

.main-nav {
  display: flex;
  gap: 24px;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px 16px;
}

.main-nav a {
  font-weight: 600;
  color: var(--color-muted);
  letter-spacing: 0.02em;
  padding-bottom: 8px;
  border-bottom: 2px solid transparent;
  transition: color 0.2s ease-in, border-color 0.2s ease-in;
}

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

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 24px;
}

.hero {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  padding: 56px clamp(24px, 6vw, 64px);
  margin-top: 32px;
  background: radial-gradient(circle at top right, rgba(16, 137, 255, 0.18), transparent 45%),
    linear-gradient(135deg, rgba(31, 78, 121, 0.95), rgba(20, 52, 82, 0.85));
  color: #f9fafb;
  display: flex;
  flex-direction: column;
  gap: 32px;
  box-shadow: var(--shadow-soft);
}

.hero-content h1 {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: 16px;
}

.hero-subtitle {
  font-size: 1.05rem;
  max-width: 520px;
  margin-bottom: 24px;
  color: rgba(255, 255, 255, 0.85);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: transform 0.2s ease-in, box-shadow 0.2s ease-in;
}

.btn.primary {
  background-color: #fff;
  color: var(--color-primary);
  box-shadow: 0 8px 22px rgba(255, 255, 255, 0.2);
}

.btn.secondary {
  background-color: rgba(255, 255, 255, 0.14);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.12);
}

.section {
  margin-top: 72px;
}

.section.soft {
  background: linear-gradient(135deg, rgba(31, 78, 121, 0.06), rgba(16, 137, 255, 0.06));
  padding: 64px clamp(24px, 6vw, 48px);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
}

.section-header h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  margin-bottom: 12px;
}

.section-header p {
  max-width: 640px;
  color: var(--color-muted);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
  margin-top: 32px;
}

.service-card {
  background-color: #fff;
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-card);
  border: 1px solid rgba(31, 78, 121, 0.08);
}

.service-card h3 {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  margin-bottom: 12px;
}

.service-card p {
  color: var(--color-muted);
  margin: 0;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
  margin-top: 40px;
}

.timeline-step {
  background-color: #fff;
  padding: 32px 24px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  border-left: 4px solid var(--color-primary);
}

.step-number {
  font-family: var(--font-heading);
  font-size: 1rem;
  color: var(--color-secondary);
  letter-spacing: 0.12em;
}

.timeline-step h3 {
  margin: 12px 0;
  font-size: 1.2rem;
}

.timeline-step p {
  color: var(--color-muted);
  margin: 0;
}

.contact {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 36px;
  align-items: start;
  margin-bottom: 96px;
}

.contact-info h2 {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  margin-bottom: 12px;
}

.contact-info p {
  margin: 6px 0;
  color: var(--color-muted);
}

.info-block {
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid rgba(31, 78, 121, 0.12);
}

.info-block h3 {
  margin-bottom: 8px;
  font-family: var(--font-heading);
}

.contact-form {
  background-color: #fff;
  padding: 32px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  display: grid;
  gap: 18px;
}

.contact-form h3 {
  margin: 0;
  font-size: 1.4rem;
}

.contact-form label {
  display: grid;
  gap: 6px;
  font-size: 0.95rem;
  color: var(--color-muted);
}

.form-feedback {
  display: none;
  margin: 0;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-primary);
}

.form-feedback.visible {
  display: block;
  margin-top: 4px;
}

.contact-form input,
.contact-form textarea {
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(31, 78, 121, 0.2);
  font-family: inherit;
  font-size: 1rem;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(31, 78, 121, 0.15);
}

.site-footer {
  text-align: center;
  padding: 32px 24px;
  color: var(--color-muted);
  font-size: 0.9rem;
}

@media (max-width: 960px) {
  .main-nav {
    display: none;
  }

  .hero {
    margin-top: 16px;
  }
}

@media (max-width: 768px) {
  .top-bar {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }

  .brand {
    flex-direction: column;
  }

  .hero {
    padding: 44px 28px;
  }

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

@media (max-width: 520px) {
  main {
    padding: 16px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .card-grid,
  .timeline {
    grid-template-columns: 1fr;
  }

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