/* 
  优德医 (Youdeyi) - 官网样式表 v2.0
  采用现代医疗深蓝与水汽蓝双色调，配合精致微动画与完美响应式布局。
*/

:root {
  --primary-color: #0f3560; /* 医疗深蓝 - 稳重专业 */
  --primary-hover: #1e4a7d;
  --secondary-color: #0ea5e9; /* 天空蓝 - 亲切现代 */
  --accent-color: #f59e0b; /* 琥珀金 - 醒目警示 */
  --bg-color: #f8fafc;
  --card-bg: #ffffff;
  --text-main: #1e293b;
  --text-muted: #64748b;
  --border-color: #e2e8f0;
  --success-color: #10b981;
  
  --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.05), 0 1px 2px rgba(0,0,0,0.02);
  --shadow-md: 0 4px 6px -1px rgba(15, 53, 96, 0.05), 0 2px 4px -1px rgba(15, 53, 96, 0.03);
  --shadow-lg: 0 10px 15px -3px rgba(15, 53, 96, 0.08), 0 4px 6px -2px rgba(15, 53, 96, 0.04);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --border-radius: 12px;
}

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

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

/* Header & Navigation */
header {
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-text {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
  letter-spacing: -0.5px;
}

.logo-badge {
  background-color: var(--secondary-color);
  color: #fff;
  font-size: 0.75rem;
  padding: 0.15rem 0.5rem;
  border-radius: 20px;
  font-weight: 600;
}

nav ul {
  display: flex;
  list-style: none;
  gap: 1.5rem;
  align-items: center;
}

nav a {
  text-decoration: none;
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.95rem;
  transition: var(--transition);
  padding: 0.5rem 0.75rem;
  border-radius: 6px;
}

nav a:hover, nav li.active a {
  color: var(--primary-color);
  background-color: rgba(15, 53, 96, 0.05);
}

.cta-btn {
  background-color: var(--primary-color);
  color: #fff;
  border: none;
  padding: 0.6rem 1.2rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: var(--shadow-md);
  text-decoration: none;
  display: inline-block;
}

.cta-btn:hover {
  background-color: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  color: #fff;
}

/* Hero Section */
.hero-section {
  background: radial-gradient(circle at 100% 0%, rgba(14, 165, 233, 0.1) 0%, rgba(255, 255, 255, 0) 50%),
              linear-gradient(135deg, rgba(15, 53, 96, 0.05) 0%, rgba(255, 255, 255, 0) 100%);
  padding: 4rem 2rem;
  text-align: center;
  border-bottom: 1px solid var(--border-color);
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
}

.hero-subtitle {
  color: var(--secondary-color);
  font-size: 1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 1rem;
}

h1 {
  font-family: var(--font-heading);
  font-size: 2.75rem;
  font-weight: 700;
  color: var(--primary-color);
  line-height: 1.25;
  margin-bottom: 1.5rem;
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
}

/* Main Container */
main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 3rem 2rem;
}

/* Card Grids */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

.card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 2rem;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(14, 165, 233, 0.3);
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background-color: var(--secondary-color);
  opacity: 0;
  transition: var(--transition);
}

.card:hover::before {
  opacity: 1;
}

.card h3 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  color: var(--primary-color);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.card p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Stats Area */
.stats-banner {
  background-color: var(--primary-color);
  color: #fff;
  border-radius: var(--border-radius);
  padding: 3rem 2rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  text-align: center;
  margin-bottom: 4rem;
  box-shadow: var(--shadow-lg);
}

.stat-item h2 {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  color: var(--secondary-color);
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.stat-item p {
  font-size: 0.9rem;
  opacity: 0.85;
  font-weight: 500;
  text-transform: uppercase;
}

/* Page content styling */
.content-wrapper {
  max-width: 900px;
  margin: 0 auto;
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 3rem;
  box-shadow: var(--shadow-md);
}

.content-wrapper h2 {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  color: var(--primary-color);
  margin-top: 2rem;
  margin-bottom: 1rem;
  border-bottom: 2px solid var(--border-color);
  padding-bottom: 0.5rem;
}

.content-wrapper p {
  margin-bottom: 1.25rem;
  color: var(--text-main);
  font-size: 1.05rem;
}

.content-wrapper ul, .content-wrapper ol {
  margin-bottom: 1.5rem;
  padding-left: 1.5rem;
}

.content-wrapper li {
  margin-bottom: 0.5rem;
  color: var(--text-main);
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  font-size: 0.95rem;
}

th, td {
  padding: 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

th {
  background-color: rgba(15, 53, 96, 0.03);
  color: var(--primary-color);
  font-weight: 600;
  font-family: var(--font-heading);
}

tr:hover {
  background-color: rgba(14, 165, 233, 0.02);
}

/* Accents and Alerts */
.badge-hot {
  background-color: rgba(245, 158, 11, 0.1);
  color: var(--accent-color);
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  font-weight: 600;
  font-size: 0.8rem;
}

.alert-info {
  background-color: rgba(14, 165, 233, 0.05);
  border-left: 4px solid var(--secondary-color);
  padding: 1rem;
  border-radius: 0 var(--border-radius) var(--border-radius) 0;
  margin: 1.5rem 0;
}

.alert-danger {
  background-color: rgba(239, 68, 68, 0.05);
  border-left: 4px solid #ef4444;
  padding: 1.2rem;
  border-radius: 0 var(--border-radius) var(--border-radius) 0;
  margin: 1.5rem 0;
}

/* FAQ Accordion or Block */
.faq-block {
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1.5rem;
}

.faq-block h3 {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  color: var(--primary-color);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
}

.faq-block h3::before {
  content: "Q";
  background-color: var(--secondary-color);
  color: #fff;
  font-size: 0.8rem;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
}

.faq-block p {
  color: var(--text-muted);
  font-size: 0.95rem;
  padding-left: 28px;
}

/* Contact card banner */
.contact-banner {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-hover) 100%);
  color: #fff;
  border-radius: var(--border-radius);
  padding: 3rem;
  text-align: center;
  margin-top: 4rem;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.contact-banner h2 {
  font-family: var(--font-heading);
  font-size: 2rem;
  margin-bottom: 1rem;
}

.contact-banner p {
  margin-bottom: 2rem;
  opacity: 0.9;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.contact-info-grid {
  display: flex;
  justify-content: center;
  gap: 3rem;
  flex-wrap: wrap;
}

.contact-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.contact-label {
  font-size: 0.8rem;
  opacity: 0.7;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.contact-value {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--secondary-color);
}

/* Footer */
footer {
  background-color: #0b1e36;
  color: rgba(255,255,255,0.6);
  padding: 3rem 2rem 1.5rem;
  border-top: 1px solid rgba(255,255,255,0.05);
  font-size: 0.9rem;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-brand {
  max-width: 300px;
}

.footer-brand h3 {
  color: #fff;
  margin-bottom: 1rem;
  font-family: var(--font-heading);
}

.footer-links {
  display: flex;
  gap: 4rem;
}

.footer-link-group h4 {
  color: #fff;
  margin-bottom: 1rem;
  font-size: 0.95rem;
}

.footer-link-group ul {
  list-style: none;
}

.footer-link-group li {
  margin-bottom: 0.5rem;
}

.footer-link-group a {
  color: rgba(255,255,255,0.6);
  text-decoration: none;
  transition: var(--transition);
}

.footer-link-group a:hover {
  color: #fff;
}

.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  border-top: 1px solid rgba(255,255,255,0.05);
  padding-top: 1.5rem;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

/* Responsive */
@media (max-width: 768px) {
  header {
    position: relative; /* 移动端不吸顶，避免占用过多垂直空间 */
  }
  h1 {
    font-size: 2rem;
  }
  .nav-container {
    flex-direction: column;
    gap: 1rem;
  }
  nav ul {
    flex-wrap: wrap;
    justify-content: center;
  }
  .content-wrapper {
    padding: 1.5rem;
  }
  .footer-container {
    flex-direction: column;
  }
  .footer-links {
    flex-direction: column;
    gap: 2rem;
    width: 100%;
  }
}