* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  font-family: 'Inter', sans-serif;
  background: #f8fafc;
  color: #0f172a;
  line-height: 1.5;
}
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}
/* header */
.main-header {
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid #e2e8f0;
}
.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 24px;
}
.logo {
  font-size: 1.8rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.logo i {
  color: #3b82f6;
}
.logo-accent { color: #3b82f6; }
.nav-list {
  display: flex;
  gap: 2rem;
  list-style: none;
}
.nav-list a {
  text-decoration: none;
  font-weight: 500;
  color: #1e293b;
  transition: 0.2s;
}
.nav-list a:hover, .nav-list a.active {
  color: #3b82f6;
}
.mobile-toggle {
  display: none;
  font-size: 1.5rem;
  cursor: pointer;
}
/* hero */
.hero {
  padding: 4rem 0 3rem;
  background: linear-gradient(135deg, #f1f5f9 0%, #ffffff 100%);
}
.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}
.hero-badge {
  background: #e0f2fe;
  color: #0284c7;
  padding: 0.3rem 0.8rem;
  border-radius: 40px;
  font-size: 0.8rem;
  font-weight: 600;
  display: inline-block;
  margin-bottom: 1rem;
}
.gradient-text {
  background: linear-gradient(135deg, #3b82f6, #8b5cf6);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
h1 {
  font-size: 3.3rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1.2rem;
}
.hero-stats {
  display: flex;
  gap: 2rem;
  margin-top: 2rem;
}
.hero-stats div {
  display: flex;
  flex-direction: column;
  font-weight: 600;
}
.hero-stats span:first-child {
  font-size: 1.6rem;
  color: #0f172a;
}
.hero-image img {
  width: 100%;
  border-radius: 32px;
  box-shadow: 0 20px 35px -12px rgba(0,0,0,0.1);
}
/* buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.8rem;
  border-radius: 40px;
  font-weight: 600;
  text-decoration: none;
  transition: 0.2s;
}
.btn-primary {
  background: #3b82f6;
  color: white;
  border: none;
}
.btn-primary:hover {
  background: #2563eb;
  transform: translateY(-2px);
}
.btn-outline {
  border: 1px solid #cbd5e1;
  background: transparent;
  color: #1e293b;
}
.btn-outline:hover {
  border-color: #3b82f6;
  color: #3b82f6;
}
.hero-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}
/* main rich text (2000+ chars) */
.main-text-rich {
  padding: 4rem 0;
}
.rich-content {
  max-width: 900px;
  margin: 0 auto;
}
.rich-content h2, .rich-content h3 {
  margin: 1.8rem 0 1rem;
}
.rich-content p {
  margin-bottom: 1.2rem;
  font-size: 1.05rem;
  color: #1e293b;
}
.inline-img {
  width: 100%;
  border-radius: 24px;
  margin: 2rem 0;
}
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px,1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}
.feature-item {
  background: white;
  padding: 1.5rem;
  border-radius: 24px;
  box-shadow: 0 4px 6px -2px #e2e8f0;
  text-align: center;
}
blockquote {
  background: #eef2ff;
  padding: 1.5rem;
  border-left: 5px solid #3b82f6;
  border-radius: 20px;
  font-style: italic;
  margin: 2rem 0;
}
.char-notice {
  text-align: center;
  background: #e2e8f0;
  padding: 0.8rem;
  border-radius: 40px;
  width: fit-content;
  margin: 2rem auto 0;
}
/* steps */
.steps-preview {
  background: white;
  padding: 4rem 0;
}
.step-cards {
  display: flex;
  gap: 2rem;
  margin-top: 2rem;
  flex-wrap: wrap;
  justify-content: center;
}
.step-card {
  background: #f8fafc;
  padding: 2rem;
  border-radius: 32px;
  text-align: center;
  flex: 1;
  min-width: 200px;
}
.step-card i {
  font-size: 2.5rem;
  color: #3b82f6;
  margin-bottom: 1rem;
}
.cta-section {
  background: #0f172a;
  color: white;
  text-align: center;
  padding: 4rem 2rem;
  border-radius: 48px;
  margin: 2rem auto;
}
.cta-section .btn-primary {
  background: #f59e0b;
  margin-top: 1rem;
}
/* footer */
.main-footer {
  background: #0f172a;
  color: #cbd5e1;
  padding: 3rem 0 1rem;
  margin-top: 3rem;
}
.footer-container {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 2rem;
}
.footer-links {
  display: flex;
  gap: 3rem;
}
.footer-links ul {
  list-style: none;
}
.footer-links a {
  color: #94a3b8;
  text-decoration: none;
}
.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  font-size: 0.8rem;
}
/* about page */
.page-hero {
  background: #eef2ff;
  text-align: center;
  padding: 3rem 1rem;
}
.about-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 2.5rem;
  padding: 3rem 0;
}
.value-card {
  background: white;
  border-radius: 24px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}
/* platform page */
.platform-showcase {
  margin: 2rem 0;
}
.platform-features {
  display: grid;
  grid-template-columns: repeat(auto-fit,minmax(250px,1fr));
  gap: 2rem;
  margin: 2rem 0;
}
.plat-card {
  background: white;
  padding: 2rem;
  border-radius: 28px;
  box-shadow: 0 8px 20px rgba(0,0,0,0.02);
}
.tech-specs {
  background: #f1f5f9;
  padding: 2rem;
  border-radius: 32px;
}
/* contact */
.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 3rem;
  padding: 3rem 0;
}
.contact-form form {
  background: white;
  padding: 2rem;
  border-radius: 32px;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.contact-form input, .contact-form textarea {
  padding: 0.8rem;
  border: 1px solid #cbd5e1;
  border-radius: 24px;
  font-family: inherit;
}
.form-note {
  font-size: 0.8rem;
  color: #475569;
}
@media (max-width: 768px) {
  .hero-grid, .about-grid, .contact-wrapper {
    grid-template-columns: 1fr;
  }
  .nav-list {
    display: none;
  }
  .mobile-toggle {
    display: block;
  }
  h1 {
    font-size: 2.2rem;
  }
}