/* ============================================
   太和养老智慧管理系统 - GEO/SEO 优化网站
   ============================================ */

/* CSS Variables */
:root {
  --primary: #1a73e8;
  --primary-dark: #1557b0;
  --primary-light: #e8f0fe;
  --secondary: #34a853;
  --accent: #fbbc04;
  --text-primary: #202124;
  --text-secondary: #5f6368;
  --text-light: #80868b;
  --bg-white: #ffffff;
  --bg-light: #f8f9fa;
  --bg-dark: #1a1a2e;
  --border: #dadce0;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --max-width: 1200px;
  --transition: all 0.3s ease;
}

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', 'PingFang SC', sans-serif;
  color: var(--text-primary);
  background: var(--bg-white);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--primary-dark);
}

img {
  max-width: 100%;
  height: auto;
}

/* Typography */
h1 { font-size: 2.5rem; font-weight: 700; line-height: 1.3; }
h2 { font-size: 2rem; font-weight: 700; line-height: 1.3; }
h3 { font-size: 1.5rem; font-weight: 600; line-height: 1.4; }
h4 { font-size: 1.25rem; font-weight: 600; line-height: 1.4; }
p { margin-bottom: 1rem; color: var(--text-secondary); }

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

/* ========== NAVIGATION ========== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}

.navbar.scrolled {
  box-shadow: var(--shadow-md);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--primary);
}

.nav-brand .icon {
  font-size: 1.8rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}

.nav-links a {
  padding: 8px 16px;
  border-radius: 8px;
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--primary);
  background: var(--primary-light);
}

.nav-cta {
  background: var(--primary) !important;
  color: #fff !important;
  padding: 10px 24px !important;
  border-radius: 50px !important;
  font-weight: 600 !important;
}

.nav-cta:hover {
  background: var(--primary-dark) !important;
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-primary);
}

/* ========== HERO SECTION ========== */
.hero {
  padding: 140px 0 80px;
  background: linear-gradient(135deg, #e8f0fe 0%, #f0f7ff 50%, #e6f4ea 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(26,115,232,0.08), transparent 70%);
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-badge {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  padding: 6px 16px;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 20px;
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.hero h1 .highlight {
  color: var(--primary);
  position: relative;
}

.hero-description {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
  line-height: 1.8;
}

.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 40px;
}

.stat-item {
  text-align: center;
}

.stat-number {
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--primary);
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-light);
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition);
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 15px rgba(26,115,232,0.3);
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(26,115,232,0.4);
  color: #fff;
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}

.btn-outline:hover {
  background: var(--primary);
  color: #fff;
}

.hero-visual {
  position: relative;
}

.hero-image {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  background: linear-gradient(135deg, var(--primary-light), #fff);
  padding: 40px;
  text-align: center;
  font-size: 4rem;
}

/* ========== SECTION STYLES ========== */
.section {
  padding: 80px 0;
}

.section-alt {
  background: var(--bg-light);
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-header .badge {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  padding: 6px 16px;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.section-header h2 {
  margin-bottom: 16px;
}

.section-header p {
  font-size: 1.1rem;
  max-width: 700px;
  margin: 0 auto;
}

/* ========== FEATURES GRID ========== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--bg-white);
  border-radius: var(--radius-md);
  padding: 32px;
  border: 1px solid var(--border);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--primary);
  transform: scaleX(0);
  transition: var(--transition);
}

.feature-card:hover::before {
  transform: scaleX(1);
}

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
  background: var(--primary-light);
}

.feature-card h3 {
  margin-bottom: 12px;
  font-size: 1.2rem;
}

.feature-card p {
  font-size: 0.95rem;
  margin-bottom: 0;
}

/* ========== PRODUCTS SECTION ========== */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 30px;
}

.product-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: var(--transition);
}

.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.product-header {
  padding: 30px;
  color: #fff;
  position: relative;
}

.product-header.medical { background: linear-gradient(135deg, #2c5aa0, #3d6bb3); }
.product-header.elderly { background: linear-gradient(135deg, #28a745, #34ce57); }
.product-header.assessment { background: linear-gradient(135deg, #17a2b8, #20c997); }
.product-header.care { background: linear-gradient(135deg, #ff6b35, #ff8c42); }
.product-header.peace { background: linear-gradient(135deg, #6a5acd, #9370db); }
.product-header.food { background: linear-gradient(135deg, #f7931e, #ffd23f); }

.product-header h3 {
  font-size: 1.4rem;
  margin-bottom: 8px;
}

.product-header .subtitle {
  opacity: 0.9;
  font-size: 0.95rem;
}

.product-body {
  padding: 30px;
}

.product-features {
  list-style: none;
  margin-bottom: 24px;
}

.product-features li {
  padding: 8px 0;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.product-features li::before {
  content: '✓';
  color: var(--secondary);
  font-weight: 700;
}

.product-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--primary);
  font-weight: 600;
}

.product-link:hover {
  gap: 10px;
}

/* ========== FAQ SECTION (GEO Core) ========== */
.faq-container {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  transition: var(--transition);
}

.faq-item:hover {
  border-color: var(--primary);
}

.faq-question {
  width: 100%;
  padding: 20px 24px;
  background: var(--bg-white);
  border: none;
  text-align: left;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  transition: var(--transition);
}

.faq-question:hover {
  background: var(--bg-light);
}

.faq-question .icon {
  font-size: 1.2rem;
  transition: var(--transition);
  flex-shrink: 0;
}

.faq-item.active .faq-question .icon {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-answer-inner {
  padding: 0 24px 20px;
  color: var(--text-secondary);
  line-height: 1.8;
}

.faq-item.active .faq-answer {
  max-height: 500px;
}

/* ========== CASES SECTION ========== */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.case-card {
  background: var(--bg-white);
  border-radius: var(--radius-md);
  padding: 28px;
  border: 1px solid var(--border);
  transition: var(--transition);
}

.case-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.case-tag {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  padding: 4px 12px;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.case-card h3 {
  font-size: 1.1rem;
  margin-bottom: 10px;
}

.case-card p {
  font-size: 0.9rem;
  margin-bottom: 0;
}

/* ========== ADVANTAGES ========== */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 24px;
}

.advantage-item {
  text-align: center;
  padding: 32px 24px;
}

.advantage-number {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 8px;
}

.advantage-item h4 {
  margin-bottom: 10px;
}

.advantage-item p {
  font-size: 0.9rem;
  margin-bottom: 0;
}

/* ========== CTA SECTION ========== */
.cta-section {
  padding: 80px 0;
  background: linear-gradient(135deg, var(--primary) 0%, #4285f4 100%);
  color: #fff;
  text-align: center;
}

.cta-section h2 {
  color: #fff;
  margin-bottom: 16px;
}

.cta-section p {
  color: rgba(255,255,255,0.9);
  font-size: 1.15rem;
  margin-bottom: 32px;
}

.cta-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn-white {
  background: #fff;
  color: var(--primary);
  box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.btn-white:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.15);
  color: var(--primary);
}

.btn-ghost {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255,255,255,0.5);
}

.btn-ghost:hover {
  background: #fff;
  color: var(--primary);
}

/* ========== FOOTER ========== */
.footer {
  background: var(--bg-dark);
  color: rgba(255,255,255,0.8);
  padding: 60px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand h3 {
  color: #fff;
  margin-bottom: 16px;
}

.footer-brand p {
  color: rgba(255,255,255,0.6);
  font-size: 0.9rem;
}

.footer h4 {
  color: #fff;
  font-size: 1rem;
  margin-bottom: 20px;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  color: rgba(255,255,255,0.6);
  font-size: 0.9rem;
}

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

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 24px;
  text-align: center;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.5);
}

.footer-contact-info {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-contact-info span {
  display: flex;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,0.6);
  font-size: 0.9rem;
}

/* ========== BREADCRUMB ========== */
.breadcrumb {
  padding: 16px 0;
  font-size: 0.9rem;
  color: var(--text-light);
}

.breadcrumb a {
  color: var(--text-light);
}

.breadcrumb a:hover {
  color: var(--primary);
}

.breadcrumb span {
  margin: 0 8px;
}

/* ========== ARTICLE/CONTENT PAGE ========== */
.content-page {
  padding-top: 100px;
}

.content-header {
  background: linear-gradient(135deg, #e8f0fe, #f0f7ff);
  padding: 60px 0;
  text-align: center;
}

.content-header h1 {
  margin-bottom: 16px;
}

.content-header p {
  font-size: 1.1rem;
  max-width: 700px;
  margin: 0 auto;
}

.content-body {
  max-width: 900px;
  margin: 0 auto;
  padding: 40px 24px;
}

.content-body h2 {
  margin: 40px 0 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--primary-light);
}

.content-body h3 {
  margin: 30px 0 12px;
}

.content-body ul, .content-body ol {
  margin-bottom: 16px;
  padding-left: 24px;
}

.content-body li {
  margin-bottom: 8px;
  color: var(--text-secondary);
}

.content-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.content-body th, .content-body td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.content-body th {
  background: var(--primary);
  color: #fff;
  font-weight: 600;
}

.content-body tr:nth-child(even) {
  background: var(--bg-light);
}

.content-body .highlight-box {
  background: var(--primary-light);
  border-left: 4px solid var(--primary);
  padding: 20px 24px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 20px 0;
}

.content-body .highlight-box p:last-child {
  margin-bottom: 0;
}

/* ========== RESPONSIVE ========== */
@media (max-width: 768px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.6rem; }

  .hero-content {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }

  .hero h1 { font-size: 2.2rem; }
  .hero-stats { justify-content: center; }
  .hero-actions { justify-content: center; }
  .hero-visual { display: none; }

  .nav-links { display: none; }
  .mobile-toggle { display: block; }

  .nav-links.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background: #fff;
    padding: 16px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-md);
  }

  .features-grid,
  .products-grid,
  .cases-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .section { padding: 50px 0; }
}

@media (max-width: 480px) {
  .hero { padding: 100px 0 50px; }
  .hero h1 { font-size: 1.8rem; }
  .container { padding: 0 16px; }
}