:root {
  --primary: #0d9488;
  --primary-dark: #0f766e;
  --secondary: #1e3a5f;
  --accent: #22c55e;
  --gradient: linear-gradient(135deg, #0d4f6e 0%, #0d9488 50%, #1e3a5f 100%);
  --text: #333;
  --text-light: #666;
  --white: #fff;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', sans-serif; color: var(--text); line-height: 1.6; }
a { text-decoration: none; color: inherit; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header { background: var(--gradient); color: var(--white); position: sticky; top: 0; z-index: 100; }
.header-inner { display: flex; align-items: center; justify-content: space-between; padding: 16px 0; }
.logo { font-size: 22px; font-weight: 700; }
.nav { display: flex; gap: 28px; align-items: center; }
.nav a { opacity: .9; transition: .2s; font-size: 15px; }
.nav a:hover { opacity: 1; }
.header-btns { display: flex; gap: 12px; }
.btn { display: inline-block; padding: 10px 24px; border-radius: 6px; font-size: 14px; font-weight: 500; cursor: pointer; border: none; transition: .2s; }
.btn-white { background: var(--white); color: var(--primary-dark); }
.btn-white:hover { background: #f0fdfa; }
.btn-green { background: var(--accent); color: var(--white); }
.btn-green:hover { background: #16a34a; }
.btn-outline-white { background: transparent; border: 1px solid rgba(255,255,255,.6); color: var(--white); }
.btn-outline-white:hover { background: rgba(255,255,255,.1); }

/* Hero */
.hero { background: var(--gradient); color: var(--white); padding: 80px 0 100px; }
.hero-inner { display: grid; grid-template-columns: 1fr 380px; gap: 60px; align-items: center; }
.hero h1 { font-size: 42px; line-height: 1.3; margin-bottom: 20px; }
.hero p { font-size: 16px; opacity: .9; margin-bottom: 30px; }
.hero-features { list-style: none; }
.hero-features li { padding: 8px 0; opacity: .85; }
.hero-features li::before { content: '✓ '; color: var(--accent); }
.hero-card { background: var(--white); border-radius: 12px; padding: 32px; color: var(--text); box-shadow: 0 20px 60px rgba(0,0,0,.2); }
.hero-card h3 { text-align: center; color: var(--primary); margin-bottom: 20px; font-size: 20px; }
.hero-card input { width: 100%; padding: 12px; border: 1px solid #e5e7eb; border-radius: 6px; margin-bottom: 14px; font-size: 14px; }
.hero-card .btn-green { width: 100%; text-align: center; padding: 14px; }

/* Stats */
.stats { padding: 60px 0; text-align: center; background: #f8fafc; }
.stats h2 { font-size: 28px; margin-bottom: 30px; color: var(--secondary); }
.stats .number { color: var(--primary); font-weight: 700; }
.app-icons { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; margin-top: 30px; max-width: 900px; margin-left: auto; margin-right: auto; }
.app-icon { width: 48px; height: 48px; border-radius: 12px; background: linear-gradient(135deg, #667eea, #764ba2); }

/* Features */
.features { padding: 80px 0; }
.section-title { text-align: center; font-size: 32px; margin-bottom: 50px; color: var(--secondary); }
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; }
.feature-item { text-align: center; padding: 30px 20px; border-radius: 12px; transition: .3s; }
.feature-item:hover { box-shadow: 0 8px 30px rgba(0,0,0,.08); transform: translateY(-4px); }
.feature-icon { width: 64px; height: 64px; margin: 0 auto 16px; background: linear-gradient(135deg, var(--primary), var(--accent)); border-radius: 16px; display: flex; align-items: center; justify-content: center; font-size: 28px; color: #fff; }
.feature-item h3 { font-size: 16px; margin-bottom: 8px; }

/* CTA Banner */
.cta-banner { background: linear-gradient(90deg, var(--primary), var(--accent)); color: var(--white); padding: 20px 0; text-align: center; }
.cta-banner p { font-size: 16px; }

/* Showcase */
.showcase { padding: 80px 0; background: #f8fafc; }
.showcase-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; }
.showcase-img { border-radius: 12px; box-shadow: 0 8px 30px rgba(0,0,0,.12); width: 100%; background: #e5e7eb; min-height: 280px; object-fit: cover; }

/* Comparison */
.comparison { padding: 80px 0; }
.compare-table { width: 100%; border-collapse: collapse; margin-top: 30px; }
.compare-table th, .compare-table td { padding: 14px 20px; text-align: center; border: 1px solid #e5e7eb; }
.compare-table th { background: var(--secondary); color: var(--white); }
.compare-table td:first-child { text-align: left; font-weight: 500; }
.check { color: var(--accent); font-size: 18px; }

/* FAQ */
.faq { padding: 80px 0; background: #f8fafc; }
.faq-item { background: var(--white); border-radius: 8px; margin-bottom: 12px; overflow: hidden; box-shadow: 0 2px 8px rgba(0,0,0,.04); }
.faq-q { padding: 18px 24px; cursor: pointer; font-weight: 600; display: flex; justify-content: space-between; }
.faq-q::after { content: '+'; font-size: 20px; color: var(--primary); }
.faq-item.open .faq-q::after { content: '−'; }
.faq-a { padding: 0 24px; max-height: 0; overflow: hidden; transition: .3s; color: var(--text-light); }
.faq-item.open .faq-a { padding: 0 24px 18px; max-height: 200px; }

/* Testimonials */
.testimonials { padding: 80px 0; }
.testimonial-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.testimonial-card { background: var(--white); padding: 28px; border-radius: 12px; box-shadow: 0 4px 16px rgba(0,0,0,.06); }
.stars { color: #f59e0b; margin-bottom: 12px; }
.testimonial-card p { font-size: 14px; color: var(--text-light); }

/* Footer */
.site-footer { background: var(--secondary); color: rgba(255,255,255,.8); padding: 60px 0 30px; }
.footer-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 40px; margin-bottom: 40px; }
.footer-grid h4 { color: var(--white); margin-bottom: 16px; font-size: 16px; }
.footer-grid ul { list-style: none; }
.footer-grid li { padding: 4px 0; font-size: 14px; }
.footer-grid a:hover { color: var(--white); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.1); padding-top: 20px; text-align: center; font-size: 13px; }

/* Page */
.page-hero { background: var(--gradient); color: var(--white); padding: 60px 0; text-align: center; }
.page-hero h1 { font-size: 32px; }
.page-content { padding: 60px 0; }
.form-card { max-width: 600px; margin: 0 auto; background: var(--white); padding: 40px; border-radius: 12px; box-shadow: 0 4px 20px rgba(0,0,0,.08); }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; margin-bottom: 6px; font-weight: 500; }
.form-group input, .form-group textarea { width: 100%; padding: 12px; border: 1px solid #e5e7eb; border-radius: 6px; font-size: 14px; }
.form-group textarea { min-height: 120px; resize: vertical; }
.alert { padding: 12px 16px; border-radius: 6px; margin-bottom: 16px; }
.alert-success { background: #f0fdf4; color: #15803d; }
.alert-danger { background: #fef2f2; color: #b91c1c; }
.contact-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; margin-top: 40px; }
.contact-card { text-align: center; padding: 30px; background: #f8fafc; border-radius: 12px; }
.contact-card h3 { margin-bottom: 12px; color: var(--primary); }

@media (max-width: 768px) {
  .hero-inner { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .showcase-grid, .testimonial-grid, .footer-grid, .contact-grid { grid-template-columns: 1fr; }
  .nav { display: none; }
  .hero h1 { font-size: 28px; }
}