/* ============================================
   CM-TA (China Medical Tourism Association)
   医旅通 - 中国精品医疗联盟
   Primary: International patients & partners
   ============================================ */

/* Reset & Base */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --color-primary: #1B5E4B;
  --color-primary-light: #2E8B6F;
  --color-accent: #D4A017;
  --color-accent-light: #F0D68A;
  --color-bg: #FAFBF8;
  --color-surface: #FFFFFF;
  --color-text: #1A1A1A;
  --color-text-secondary: #555555;
  --color-text-muted: #888888;
  --color-border: #E8EAE4;
  --color-border-light: #F2F4EE;
  --color-success: #2E8B6F;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.10);
  --max-width: 1200px;
  --font-main: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-main);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--color-primary); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--color-primary-light); }
img { max-width: 100%; display: block; }

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

/* ========== Navigation ========== */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  padding: 0 24px;
}
.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.nav-logo {
  display: flex; align-items: center; gap: 10px;
  font-size: 1.25rem; font-weight: 700; color: var(--color-primary);
}
.nav-logo .logo-icon {
  width: 36px; height: 36px;
  background: var(--color-primary);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 1.1rem; font-weight: 700;
}
.nav-logo span.cn { font-size: 0.85rem; color: var(--color-text-muted); font-weight: 400; margin-left: 4px; }
.nav-links { display: flex; gap: 32px; list-style: none; align-items: center; }
.nav-links a { color: var(--color-text-secondary); font-weight: 500; font-size: 0.95rem; }
.nav-links a:hover, .nav-links a.active { color: var(--color-primary); }
.nav-cta {
  background: var(--color-primary); color: #fff !important;
  padding: 8px 20px; border-radius: 20px; font-weight: 600 !important;
  font-size: 0.9rem !important; transition: background 0.2s;
}
.nav-cta:hover { background: var(--color-primary-light); }
.nav-mobile-toggle { display: none; background: none; border: none; font-size: 1.5rem; cursor: pointer; color: var(--color-text); }

/* ========== Hero ========== */
.hero {
  padding: 80px 24px 60px;
  text-align: center;
  background: linear-gradient(180deg, var(--color-surface) 0%, var(--color-bg) 100%);
}
.hero-badge {
  display: inline-block;
  background: var(--color-accent-light);
  color: #7A5C10;
  font-size: 0.85rem; font-weight: 600;
  padding: 6px 16px; border-radius: 20px;
  margin-bottom: 24px;
}
.hero h1 { font-size: 2.8rem; font-weight: 800; line-height: 1.25; color: var(--color-text); max-width: 800px; margin: 0 auto 16px; }
.hero h1 .highlight { color: var(--color-primary); }
.hero p.subtitle {
  font-size: 1.2rem; color: var(--color-text-secondary);
  max-width: 640px; margin: 0 auto 36px;
}
.hero-ctas { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-block; padding: 14px 32px; border-radius: 30px;
  font-weight: 600; font-size: 1rem; text-align: center;
  cursor: pointer; border: none; transition: all 0.2s;
}
.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover { background: var(--color-primary-light); color: #fff; }
.btn-outline { background: transparent; color: var(--color-primary); border: 2px solid var(--color-primary); }
.btn-outline:hover { background: var(--color-primary); color: #fff; }
.btn-accent { background: var(--color-accent); color: #fff; }
.btn-accent:hover { background: #C49012; color: #fff; }

/* ========== Section Common ========== */
.section { padding: 80px 24px; }
.section-label {
  display: inline-block;
  font-size: 0.8rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: 1.5px; color: var(--color-primary);
  margin-bottom: 12px;
}
.section h2 { font-size: 2rem; font-weight: 700; margin-bottom: 12px; }
.section h3 { font-size: 1.3rem; font-weight: 600; margin-bottom: 8px; }
.section .section-desc {
  color: var(--color-text-secondary); font-size: 1.05rem;
  max-width: 600px; margin-bottom: 48px;
}
.section-alt { background: var(--color-surface); }

/* ========== Three-Party Model ========== */
.model-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 24px;
  margin-top: 32px;
}
.model-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  border: 1px solid var(--color-border);
  text-align: center;
  transition: box-shadow 0.2s;
  position: relative;
}
.model-card:hover { box-shadow: var(--shadow-md); }
.model-card .model-icon {
  width: 56px; height: 56px; border-radius: 50%;
  margin: 0 auto 20px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem;
}
.model-card.left .model-icon { background: #E8F5E9; color: var(--color-primary); }
.model-card.center .model-icon { background: #EDE7F6; color: #5E35B1; }
.model-card.right .model-icon { background: #FCE4EC; color: #C62828; }
.model-card .model-badge {
  display: inline-block; font-size: 0.7rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 1px;
  padding: 4px 12px; border-radius: 12px; margin-bottom: 12px;
}
.model-card .model-title { font-size: 1.15rem; font-weight: 700; margin-bottom: 8px; }
.model-card .model-desc { font-size: 0.92rem; color: var(--color-text-secondary); line-height: 1.5; }
.model-card .model-items { margin-top: 16px; text-align: left; }
.model-card .model-items li {
  font-size: 0.88rem; color: var(--color-text-secondary);
  padding: 6px 0; border-bottom: 1px solid var(--color-border-light);
  list-style: none; display: flex; align-items: center; gap: 8px;
}
.model-card .model-items li::before { content: "✓"; color: var(--color-success); font-weight: 700; }
.model-arrow {
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem; color: var(--color-text-muted);
}
.model-center-tag {
  position: absolute; top: -14px; left: 50%; transform: translateX(-50%);
  background: var(--color-primary); color: #fff;
  font-size: 0.7rem; font-weight: 700; padding: 4px 16px;
  border-radius: 12px; white-space: nowrap;
}

/* ========== Value Proposition ========== */
.value-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 24px;
}
.value-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  transition: box-shadow 0.2s;
}
.value-card:hover { box-shadow: var(--shadow-md); }
.value-card .value-num {
  font-size: 2.2rem; font-weight: 800; color: var(--color-primary);
  opacity: 0.15; line-height: 1;
}
.value-card h3 { margin-top: -8px; }
.value-card p { font-size: 0.92rem; color: var(--color-text-secondary); line-height: 1.6; }

/* ========== Lifecycle ========== */
.lifecycle-flow {
  display: flex; align-items: flex-start; justify-content: space-between;
  gap: 16px; margin-top: 32px; flex-wrap: wrap;
}
.lifecycle-step {
  flex: 1; min-width: 200px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  text-align: center;
  position: relative;
}
.lifecycle-step .step-num {
  width: 40px; height: 40px; border-radius: 50%;
  margin: 0 auto 12px;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 1.1rem; color: #fff;
}
.lifecycle-step:nth-child(1) .step-num { background: var(--color-primary); }
.lifecycle-step:nth-child(2) .step-num { background: #5E35B1; }
.lifecycle-step:nth-child(3) .step-num { background: #C62828; }
.lifecycle-step:nth-child(4) .step-num { background: var(--color-accent); }
.lifecycle-step .step-title { font-weight: 700; font-size: 1rem; margin-bottom: 6px; }
.lifecycle-step .step-desc { font-size: 0.85rem; color: var(--color-text-secondary); line-height: 1.5; }
.lifecycle-arrow {
  display: flex; align-items: center; justify-content: center;
  color: var(--color-text-muted); font-size: 1.3rem; padding-top: 28px;
  flex-shrink: 0;
}

/* ========== Packages ========== */
.package-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 24px;
}
.package-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  transition: all 0.2s;
}
.package-card:hover { box-shadow: var(--shadow-md); border-color: var(--color-primary-light); }
.package-card.featured { border-color: var(--color-accent); border-width: 2px; position: relative; }
.package-card .pkg-badge {
  position: absolute; top: -12px; right: 20px;
  background: var(--color-accent); color: #fff;
  font-size: 0.7rem; font-weight: 700; padding: 4px 12px; border-radius: 12px;
}
.package-card .pkg-icon { font-size: 2rem; margin-bottom: 12px; }
.package-card .pkg-title { font-weight: 700; font-size: 1.1rem; margin-bottom: 4px; }
.package-card .pkg-subtitle { font-size: 0.85rem; color: var(--color-text-muted); margin-bottom: 16px; }
.package-card .pkg-features { margin-bottom: 20px; }
.package-card .pkg-features li {
  font-size: 0.88rem; color: var(--color-text-secondary);
  padding: 5px 0; list-style: none;
  display: flex; align-items: center; gap: 8px;
}
.package-card .pkg-features li::before { content: "✓"; color: var(--color-success); font-weight: 700; }
.package-card .pkg-price { font-size: 1.5rem; font-weight: 800; color: var(--color-primary); margin-bottom: 4px; }
.package-card .pkg-price-note { font-size: 0.8rem; color: var(--color-text-muted); margin-bottom: 16px; }

/* ========== Partners / Hospitals ========== */
.partner-logos {
  display: flex; flex-wrap: wrap; gap: 32px; justify-content: center;
  align-items: center; margin-top: 24px;
}
.partner-logo-placeholder {
  width: 160px; height: 80px;
  background: var(--color-surface);
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  color: var(--color-text-muted); font-size: 0.85rem; text-align: center;
  transition: all 0.2s;
}
.partner-logo-placeholder:hover { border-color: var(--color-primary); color: var(--color-primary); }

/* ========== CTA ========== */
.cta-section {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: #fff; text-align: center; padding: 64px 24px;
  border-radius: var(--radius-lg); margin: 0 24px 80px;
}
.cta-section h2 { font-size: 2rem; font-weight: 700; margin-bottom: 12px; }
.cta-section p { font-size: 1.05rem; opacity: 0.9; max-width: 500px; margin: 0 auto 28px; }
.cta-section .btn { background: #fff; color: var(--color-primary); }
.cta-section .btn:hover { background: var(--color-accent-light); }

/* ========== Footer ========== */
.footer {
  background: #1A1D1A; color: #ccc; padding: 48px 24px 24px;
}
.footer-grid {
  max-width: var(--max-width); margin: 0 auto;
  display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px;
}
.footer-brand { font-size: 1.2rem; font-weight: 700; color: #fff; margin-bottom: 8px; }
.footer-brand .cn { font-size: 0.9rem; color: #999; font-weight: 400; }
.footer-col h4 { color: #fff; font-size: 0.9rem; margin-bottom: 16px; text-transform: uppercase; letter-spacing: 1px; }
.footer-col a { display: block; color: #999; font-size: 0.9rem; margin-bottom: 8px; }
.footer-col a:hover { color: var(--color-accent-light); }
.footer-bottom {
  max-width: var(--max-width); margin: 32px auto 0; padding-top: 20px;
  border-top: 1px solid #333; text-align: center;
  font-size: 0.82rem; color: #777;
}

/* ========== Responsive ========== */
@media (max-width: 900px) {
  .model-grid, .package-grid, .value-grid { grid-template-columns: 1fr; }
  .lifecycle-flow { flex-direction: column; }
  .lifecycle-arrow { transform: rotate(90deg); padding: 0; }
  .hero h1 { font-size: 2rem; }
  .section h2 { font-size: 1.6rem; }
  .footer-grid { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  .nav-mobile-toggle { display: block; }
}