:root {
  --primary: #1e90ff;
  --accent: #ffc107;
  --bg: #f7f9fb;
  --text: #222;
  --card: #fff;
  --border: #e0e0e0;
  --shadow: 0 2px 16px rgba(0,0,0,0.05);
  --radius: 16px;
}
body {
  font-family: 'Inter', Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  margin: 0;
  padding: 0;
}
header {
  background: var(--card);
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 1000;
}
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.2rem 2rem;
  max-width: 1200px;
  margin: auto;
}
.logo {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  font-weight: bold;
  font-size: 1.25rem;
}
.big-logo {
  width: 62px;
  height: auto;
  margin-right: 0.5rem;
}
nav ul {
  list-style: none;
  display: flex;
  gap: 2rem;
  margin: 0;
  padding: 0;
}
nav ul li {
  display: inline;
}
nav ul .btn {
  background: var(--primary);
  color: #fff;
  padding: 0.4rem 1.2rem;
  border-radius: 50px;
  text-decoration: none;
  font-weight: bold;
  transition: background 0.2s;
}
nav ul .ghost {
  background: transparent;
  color: var(--primary);
  border: 1px solid var(--primary);
}
nav ul .btn:hover {
  background: var(--accent);
  color: var(--text);
}
.lang-select select {
  border-radius: 8px;
  padding: 0.3rem 0.8rem;
  border: 1px solid var(--border);
  font-size: 1rem;
}

.hero {
  background: linear-gradient(110deg, #eaf6ff 60%, #fff);
  padding: 3rem 0 2.5rem 0;
}
.hero-content {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: auto;
  gap: 2rem;
}
.hero-text {
  flex: 1 1 400px;
  min-width: 300px;
}
.hero-content h1 {
  font-size: 2.7rem;
  margin-bottom: 0.7rem;
  color: var(--primary);
}
.hero-content .subtitle {
  font-size: 1.25rem;
  margin-bottom: 1.4rem;
}
.hero-content .cta {
  background: var(--primary);
  color: #fff;
  font-weight: bold;
  border: none;
  border-radius: 60px;
  padding: 0.8rem 2rem;
  font-size: 1.2rem;
  cursor: pointer;
  margin-bottom: 1.5rem;
  transition: background 0.2s;
}
.hero-content .cta:hover {
  background: var(--accent);
  color: var(--text);
}
.hero-graphic img {
  width: 370px;
  max-width: 100%;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.social-bar {
  margin: 2rem auto 0 auto;
  text-align: center;
  font-size: 2rem;
}
.social-bar a {
  margin: 0 0.5rem;
  color: #222;
  transition: color 0.15s;
}
.social-bar a:hover {
  color: var(--primary);
}

.features {
  padding: 3rem 2rem;
  background: var(--bg);
  max-width: 1200px;
  margin: auto;
}
.features h2 {
  text-align: center;
  margin-bottom: 2rem;
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px,1fr));
  gap: 2rem;
}
.feature-card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 2rem;
  text-align: center;
  border: 1px solid var(--border);
  position: relative;
}
.feature-card img {
  width: 54px;
  margin-bottom: 1rem;
}
.feature-card h3 {
  color: var(--primary);
  margin-bottom: 1rem;
}
.feature-card ul {
  list-style: none;
  padding: 0;
  margin: 0;
  text-align: left;
}
.feature-card li {
  margin-bottom: 0.7rem;
  font-size: 1rem;
}
.live-img {
  display: block;
  width: 100%;
  max-width: 230px;
  margin: 1.2rem auto 0 auto;
  border-radius: 10px;
  box-shadow: 0 1px 8px rgba(30,144,255,0.07);
}

.why-choose {
  background: #fff;
  padding: 3rem 2rem;
  max-width: 1200px;
  margin: auto;
}
.why-choose h2 {
  text-align: center;
  margin-bottom: 1.8rem;
}
.why-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px,1fr));
  gap: 2rem;
}
.why-item {
  text-align: center;
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.5rem;
  border: 1px solid var(--border);
}
.why-item img {
  width: 44px;
  margin-bottom: 1rem;
}
.why-item h4 {
  color: var(--primary);
  margin-bottom: 0.6rem;
}
.why-item p {
  font-size: 1rem;
  color: #555;
}

.testimonials {
  background: var(--bg);
  padding: 3rem 2rem;
  max-width: 900px;
  margin: auto;
}
.testimonials h2 {
  text-align: center;
  margin-bottom: 2rem;
}
.testimonial-list {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  justify-content: center;
}
.testimonial {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.2rem 1.7rem;
  max-width: 280px;
  text-align: center;
  border: 1px solid var(--border);
}
.testimonial img {
  width: 40px;
  border-radius: 50%;
  margin-bottom: 0.7rem;
}
.testimonial blockquote {
  font-style: italic;
  color: #444;
  margin-bottom: 0.7rem;
}
.testimonial .user {
  font-size: 0.95rem;
  color: #888;
}

.cta-final {
  text-align: center;
  padding: 2.5rem 1rem;
  background: linear-gradient(90deg, #eaf6ff 70%, #fff);
}
.cta-final h2 {
  font-size: 2rem;
  margin-bottom: 1.2rem;
  color: var(--primary);
}
.cta-final .cta.large {
  font-size: 1.25rem;
  padding: 1rem 2.3rem;
  background: var(--primary);
  color: #fff;
  border-radius: 60px;
  border: none;
  cursor: pointer;
  font-weight: bold;
  margin-bottom: 1.2rem;
}
.cta-final .note {
  color: #888;
  margin-top: 0.8rem;
  font-size: 1rem;
}

footer {
  background: var(--card);
  border-top: 1px solid var(--border);
  padding: 1.2rem 0;
  text-align: center;
  color: #888;
  font-size: 0.95rem;
}
.footer-content {
  max-width: 1200px;
  margin: auto;
}
.footer-logo {
  margin-bottom: 0.7rem;
}
.footer-app-icon {
  width: 38px;
  border-radius: 8px;
}
footer a {
  color: var(--primary);
  text-decoration: none;
  font-weight: bold;
}
.footer-social a {
  margin: 0 0.25rem;
  font-size: 1.6rem;
  color: #222;
  transition: color 0.15s;
}
.footer-social a:hover {
  color: var(--primary);
}

/* Responsive */
@media (max-width: 800px) {
  .navbar, .hero-content, .features, .why-choose, .testimonials {
    flex-direction: column;
    padding: 1.2rem;
  }
  .features-grid, .why-grid, .testimonial-list {
    grid-template-columns: 1fr;
    gap: 1.2rem;
  }
  .hero-content {
    gap: 1.5rem;
  }
}