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

:root {
  --blue: #2481cc;
  --blue-dark: #1a6aaa;
  --blue-light: #60adf5;
  --text: #111827;
  --text-muted: #6b7280;
  --bg: #ffffff;
  --bg-soft: #f9fafb;
  --border: #e5e7eb;
  --radius: 12px;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-weight: 600; font-family: inherit;
  border-radius: 10px; border: none;
  cursor: pointer; text-decoration: none;
  transition: all 0.2s; white-space: nowrap;
}
.btn-primary { background: var(--blue); color: #fff; }
.btn-primary:hover { background: var(--blue-dark); }
.btn-ghost { background: rgba(255,255,255,0.12); color: #fff; border: 1.5px solid rgba(255,255,255,0.3); }
.btn-ghost:hover { background: rgba(255,255,255,0.22); }
.btn-outline { background: transparent; color: var(--blue); border: 1.5px solid var(--blue); }
.btn-outline:hover { background: var(--blue); color: #fff; }
.btn-sm  { font-size: 14px; padding: 8px 18px; }
.btn-lg  { font-size: 16px; padding: 14px 32px; border-radius: 12px; }
.btn-full { width: 100%; justify-content: center; font-size: 15px; padding: 13px; }

/* Header */
.header {
  position: sticky; top: 0;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  z-index: 100; padding: 10px 0;
}
.header-inner { display: flex; align-items: center; gap: 20px; }

/* Logo */
.logo { display: flex; align-items: center; text-decoration: none; flex-shrink: 0; }
.logo-img { height: 38px; width: auto; display: block; }

.nav { display: flex; align-items: center; gap: 2px; flex: 1; }
.nav-link {
  font-size: 14px; font-weight: 500; color: var(--text-muted);
  text-decoration: none; padding: 6px 12px; border-radius: 8px;
  transition: all 0.15s; white-space: nowrap;
}
.nav-link:hover { color: var(--text); background: var(--bg-soft); }
.nav-link.active { color: var(--blue); font-weight: 600; }
.header-actions { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.lang-btn {
  background: none; border: 1px solid var(--border);
  border-radius: 8px; padding: 6px 12px;
  font-size: 13px; font-weight: 600; font-family: inherit;
  cursor: pointer; color: var(--text-muted);
  transition: all 0.15s;
}
.lang-btn:hover { border-color: var(--blue); color: var(--blue); }
.hamburger {
  display: none; background: none; border: none;
  font-size: 22px; cursor: pointer; color: var(--text); padding: 2px 6px;
}
.mobile-nav {
  display: none;
  position: absolute; top: 100%; left: 0; right: 0;
  background: var(--bg); border-bottom: 1px solid var(--border);
  box-shadow: 0 4px 16px rgba(0,0,0,0.08);
  z-index: 99;
}
.mobile-nav a {
  display: block; padding: 13px 24px;
  font-size: 15px; font-weight: 500;
  color: var(--text); text-decoration: none;
  border-bottom: 1px solid var(--border);
}
.mobile-nav a:last-child { border-bottom: none; }
.mobile-nav a:hover { background: var(--bg-soft); }
.mobile-nav a.active { color: var(--blue); }
.mobile-nav.open { display: block; }

/* Toast */
.toast {
  position: fixed; bottom: 24px; left: 50%;
  transform: translateX(-50%) translateY(16px);
  background: #1f2937; color: #fff;
  font-size: 14px; font-weight: 500; font-family: inherit;
  padding: 12px 20px; border-radius: 10px;
  opacity: 0; transition: all 0.3s;
  z-index: 9999; white-space: nowrap;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* Section header */
.section-header { text-align: center; margin-bottom: 52px; }
.section-header h2 { font-size: clamp(26px, 4vw, 38px); font-weight: 800; letter-spacing: -0.5px; margin-bottom: 10px; }
.section-header p { font-size: 17px; color: var(--text-muted); }

/* Hero (dark) */
.hero {
  background: linear-gradient(135deg, #0f1c2e 0%, #1a3a5c 50%, #0d2b4a 100%);
  color: #fff; padding: 100px 0 88px; text-align: center;
}
.hero-badge {
  display: inline-block;
  background: rgba(255,255,255,0.12); border: 1px solid rgba(255,255,255,0.2);
  padding: 6px 16px; border-radius: 20px;
  font-size: 13px; font-weight: 500; margin-bottom: 24px;
}
.hero-title { font-size: clamp(36px, 6vw, 64px); font-weight: 800; line-height: 1.1; margin-bottom: 20px; letter-spacing: -1.5px; }
.text-blue { color: var(--blue-light); }
.hero-desc { font-size: clamp(16px, 2vw, 19px); color: rgba(255,255,255,0.75); max-width: 560px; margin: 0 auto 36px; line-height: 1.65; }
.hero-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-bottom: 16px; }
.hero-note { font-size: 13px; color: rgba(255,255,255,0.45); }

/* Page hero (light) */
.page-hero {
  background: var(--bg-soft); border-bottom: 1px solid var(--border);
  padding: 64px 0; text-align: center;
}
.page-hero h1 { font-size: clamp(28px, 4vw, 44px); font-weight: 800; letter-spacing: -1px; margin-bottom: 12px; }
.page-hero p { font-size: 18px; color: var(--text-muted); max-width: 500px; margin: 0 auto; }

/* Features */
.features { padding: 88px 0; }
.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; }
.feature-card { padding: 28px; border-radius: var(--radius); border: 1px solid var(--border); transition: box-shadow 0.2s; }
.feature-card:hover { box-shadow: 0 4px 24px rgba(0,0,0,0.07); }
.feature-icon { font-size: 30px; margin-bottom: 14px; }
.feature-card h3 { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.feature-card p { color: var(--text-muted); font-size: 14px; line-height: 1.65; }

/* Steps */
.steps { padding: 88px 0; background: var(--bg-soft); }
.steps-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 24px; }
.step-card { background: var(--bg); border-radius: var(--radius); padding: 32px; border: 1px solid var(--border); }
.step-num {
  width: 44px; height: 44px; background: var(--blue); color: #fff;
  border-radius: 12px; display: flex; align-items: center; justify-content: center;
  font-size: 20px; font-weight: 800; margin-bottom: 16px;
}
.step-card h3 { font-size: 17px; font-weight: 700; margin-bottom: 8px; }
.step-card p { color: var(--text-muted); font-size: 15px; line-height: 1.6; }
.steps-cta { text-align: center; margin-top: 44px; }

/* Trial */
.trial-section { padding: 88px 0; background: var(--bg-soft); }
.trial-card {
  background: linear-gradient(135deg, #0f1c2e, #1a3a5c);
  color: #fff; border-radius: 20px; padding: 52px 40px;
  text-align: center; max-width: 620px; margin: 0 auto;
}
.trial-badge {
  display: inline-block;
  background: rgba(255,255,255,0.15); border: 1px solid rgba(255,255,255,0.25);
  padding: 6px 16px; border-radius: 20px;
  font-size: 13px; font-weight: 600; margin-bottom: 20px;
}
.trial-card h2 { font-size: 38px; font-weight: 800; margin-bottom: 12px; letter-spacing: -0.5px; }
.trial-card > p { color: rgba(255,255,255,0.7); font-size: 16px; margin-bottom: 28px; line-height: 1.6; }
.trial-perks { display: flex; justify-content: center; gap: 20px; flex-wrap: wrap; margin-bottom: 32px; }
.trial-perk { font-size: 14px; color: rgba(255,255,255,0.85); display: flex; align-items: center; gap: 6px; }

/* Pricing */
.pricing { padding: 88px 0; }
.pricing-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px; max-width: 860px; margin: 0 auto 20px;
}
.pricing-card { background: var(--bg); border: 1.5px solid var(--border); border-radius: 16px; padding: 32px; position: relative; }
.pricing-card-featured { border-color: var(--blue); box-shadow: 0 0 0 4px rgba(36,129,204,0.1); }
.plan-badge {
  position: absolute; top: -13px; left: 50%; transform: translateX(-50%);
  background: var(--blue); color: #fff;
  font-size: 12px; font-weight: 700; padding: 4px 14px; border-radius: 20px;
  white-space: nowrap; letter-spacing: 0.3px;
}
.plan-name { font-size: 13px; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.8px; margin-bottom: 8px; }
.plan-price { font-size: 40px; font-weight: 800; margin-bottom: 24px; letter-spacing: -1px; }
.plan-price span { font-size: 16px; font-weight: 500; color: var(--text-muted); }
.plan-features { list-style: none; margin-bottom: 28px; display: flex; flex-direction: column; gap: 10px; }
.plan-features li { font-size: 14px; }
.plan-features li.dim { color: var(--text-muted); }
.pricing-note { text-align: center; font-size: 13px; color: var(--text-muted); margin-top: 16px; }

/* Guide page */
.guide-section { padding: 72px 0; }
.guide-toggle { display: flex; justify-content: center; margin-bottom: 52px; }
.guide-tab {
  padding: 11px 32px; font-size: 15px; font-weight: 600;
  font-family: inherit; cursor: pointer;
  border: 1.5px solid var(--border); background: var(--bg); color: var(--text-muted);
  transition: all 0.2s;
}
.guide-tab:first-child { border-radius: 10px 0 0 10px; }
.guide-tab:last-child  { border-radius: 0 10px 10px 0; margin-left: -1.5px; }
.guide-tab.active { background: var(--blue); color: #fff; border-color: var(--blue); z-index: 1; position: relative; }
.guide-panel { display: none; }
.guide-panel.active { display: block; }

.text-steps { max-width: 700px; margin: 0 auto; }
.text-step { display: flex; gap: 28px; padding: 32px 0; border-bottom: 1px solid var(--border); }
.text-step:last-child { border-bottom: none; }
.text-step-num { font-size: 30px; font-weight: 800; color: var(--blue); opacity: 0.22; min-width: 48px; line-height: 1; padding-top: 3px; }
.text-step-body h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.text-step-body p { color: var(--text-muted); font-size: 15px; line-height: 1.65; margin-bottom: 16px; }
.screenshot-placeholder {
  width: 100%; aspect-ratio: 16/9;
  background: var(--bg-soft); border: 2px dashed var(--border);
  border-radius: 12px; display: flex; align-items: center; justify-content: center;
  color: var(--text-muted); font-size: 14px;
}
.video-wrap { max-width: 720px; margin: 0 auto; }
.video-placeholder {
  aspect-ratio: 16/9; background: var(--bg-soft);
  border: 2px dashed var(--border); border-radius: 16px;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 14px; color: var(--text-muted); margin-bottom: 20px;
}
.video-play-icon {
  width: 64px; height: 64px; background: var(--blue); color: #fff;
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
  font-size: 22px; padding-left: 4px; opacity: 0.45;
}
.video-note { text-align: center; font-size: 15px; color: var(--text-muted); }

/* About */
.about-section { padding: 88px 0; }
.about-desc { max-width: 680px; margin: 0 auto 72px; text-align: center; font-size: 17px; line-height: 1.75; color: var(--text-muted); }
.contact-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 20px; max-width: 820px; margin: 0 auto; }
.contact-card {
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 28px; text-align: center;
  text-decoration: none; color: var(--text);
  transition: box-shadow 0.2s; display: block;
}
.contact-card:hover { box-shadow: 0 4px 24px rgba(0,0,0,0.08); }
.contact-card.muted { opacity: 0.55; cursor: default; }
.contact-card.muted:hover { box-shadow: none; }
.contact-icon { font-size: 30px; margin-bottom: 12px; }
.contact-card h3 { font-size: 15px; font-weight: 700; margin-bottom: 6px; }
.contact-card p { font-size: 14px; color: var(--text-muted); }

/* CTA */
.cta { background: linear-gradient(135deg, #0f1c2e, #1a3a5c); color: #fff; text-align: center; padding: 88px 0; }
.cta h2 { font-size: clamp(26px, 4vw, 38px); font-weight: 800; margin-bottom: 14px; letter-spacing: -0.5px; }
.cta p { font-size: 17px; color: rgba(255,255,255,0.65); margin-bottom: 36px; }

/* Footer */
.footer { background: #0a1628; color: rgba(255,255,255,0.55); padding: 36px 0; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 16px; }
.footer-logo { font-weight: 700; font-size: 16px; color: #fff; }
.footer-links { display: flex; gap: 20px; flex-wrap: wrap; }
.footer-links a { color: rgba(255,255,255,0.55); text-decoration: none; font-size: 14px; transition: color 0.2s; }
.footer-links a:hover { color: #fff; }
.footer-copy { font-size: 13px; width: 100%; margin-top: 4px; }

/* Responsive */
@media (max-width: 768px) {
  .nav { display: none; }
  .hamburger { display: block; }
  .header { position: relative; }
}
@media (max-width: 640px) {
  .hero { padding: 64px 0 56px; }
  .hero-actions { flex-direction: column; align-items: center; }
  .features, .steps, .pricing, .cta, .about-section, .guide-section { padding: 56px 0; }
  .trial-card { padding: 36px 24px; }
  .trial-perks { flex-direction: column; align-items: center; gap: 12px; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
  .text-step { gap: 16px; }
  .text-step-num { font-size: 24px; min-width: 40px; }
  .guide-tab { padding: 10px 20px; font-size: 14px; }
  .logo-img { height: 32px; }
}