/* ==========================================================================
   FieldDogWater - Official Support & Legal Portal Stylesheet
   Design Philosophy: Apple-inspired, Cozy Pet Aesthetic, Water Blue & Field Green
   ========================================================================== */

:root {
  /* Brand Color Palette */
  --primary: #2B8CEE;
  --primary-hover: #1E74CD;
  --primary-dark: #125499;
  --primary-light: #EBF5FF;
  --primary-subtle: #F4F9FF;
  
  --secondary: #27AE60;
  --secondary-hover: #219653;
  --secondary-light: #E8F8F0;
  --secondary-dark: #196F3D;
  
  --accent: #E67E22;
  --accent-hover: #D35400;
  --accent-light: #FEF5E7;
  
  --bg-page: #F8FAFC;
  --bg-card: #FFFFFF;
  --bg-card-subtle: #F1F5F9;
  --bg-card-hover: #FCFDFE;
  
  --text-main: #0F172A;
  --text-secondary: #334155;
  --text-muted: #64748B;
  --text-light: #94A3B8;
  
  --border: #E2E8F0;
  --border-light: #F1F5F9;
  --border-highlight: rgba(43, 140, 238, 0.35);
  
  --shadow-xs: 0 1px 3px rgba(15, 23, 42, 0.04);
  --shadow-sm: 0 4px 12px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 10px 25px rgba(43, 140, 238, 0.08);
  --shadow-lg: 0 18px 38px rgba(15, 23, 42, 0.09);
  
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;
  
  --container-max: 980px;
  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", "PingFang TC", "PingFang HK", "Helvetica Neue", "Segoe UI", Arial, sans-serif;
  color: var(--text-main);
  background-color: var(--bg-page);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-page);
  color: var(--text-secondary);
}

/* Bilingual Display Rules */
[lang="zh-Hant"] .lang-en,
[lang="zh-TW"] .lang-en,
[lang="zh-HK"] .lang-en,
[lang="zh"] .lang-en {
  display: none !important;
}

[lang="en"] .lang-zh {
  display: none !important;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-main);
  font-weight: 700;
  line-height: 1.28;
}

p {
  color: var(--text-secondary);
  line-height: 1.7;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition-fast), background-color var(--transition-fast), border-color var(--transition-fast);
}

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

/* Layout Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* Site Navigation Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: all var(--transition-fast);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
  gap: 16px;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  flex-shrink: 0;
}

.brand-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--primary) 0%, #00B4D8 100%);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFFFFF;
  font-size: 20px;
  box-shadow: 0 4px 10px rgba(43, 140, 238, 0.25);
  flex-shrink: 0;
}

.brand-title-group {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.01em;
  line-height: 1.2;
}

.brand-subtitle {
  font-size: 0.76rem;
  color: var(--text-muted);
  font-weight: 500;
}

.nav-right-wrapper {
  display: flex;
  align-items: center;
  gap: 16px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
  list-style: none;
}

.nav-links a {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

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

/* Language Switcher Component */
.lang-switcher {
  display: inline-flex;
  align-items: center;
  background-color: var(--bg-card-subtle);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  padding: 3px;
  gap: 2px;
  flex-shrink: 0;
}

.lang-btn {
  border: none;
  background: transparent;
  padding: 5px 12px;
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-family: inherit;
  white-space: nowrap;
}

.lang-btn:hover:not(.active) {
  color: var(--text-main);
}

.lang-btn.active {
  background-color: var(--bg-card);
  color: var(--primary-dark);
  box-shadow: var(--shadow-xs);
}

/* Hero Section */
.hero {
  padding: 56px 0 36px;
  text-align: center;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background-color: var(--primary-light);
  color: var(--primary-dark);
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  margin-bottom: 20px;
  border: 1px solid rgba(43, 140, 238, 0.2);
}

.hero-title {
  font-size: 2.6rem;
  letter-spacing: -0.025em;
  margin-bottom: 12px;
  color: var(--text-main);
  line-height: 1.2;
}

.hero-subtitle {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 16px;
}

.hero-desc {
  font-size: 1.06rem;
  max-width: 660px;
  margin: 0 auto 28px;
  color: var(--text-secondary);
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  font-family: inherit;
}

.btn-primary {
  background-color: var(--primary);
  color: #FFFFFF;
  box-shadow: 0 4px 14px rgba(43, 140, 238, 0.28);
}

.btn-primary:hover {
  background-color: var(--primary-hover);
  color: #FFFFFF;
  box-shadow: 0 6px 18px rgba(43, 140, 238, 0.38);
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: var(--bg-card);
  color: var(--text-secondary);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-xs);
}

.btn-secondary:hover {
  background-color: var(--primary-light);
  color: var(--primary);
  border-color: rgba(43, 140, 238, 0.3);
}

/* Section Shared Styles */
.section {
  padding: 44px 0;
}

.section-header {
  margin-bottom: 32px;
  text-align: center;
}

.section-title {
  font-size: 1.85rem;
  letter-spacing: -0.015em;
  margin-bottom: 8px;
  color: var(--text-main);
}

.section-desc {
  font-size: 0.98rem;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto;
}

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(215px, 1fr));
  gap: 20px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.feature-card:hover {
  transform: translateY(-2px);
  border-color: var(--border-highlight);
  box-shadow: var(--shadow-md);
  background: var(--bg-card-hover);
}

.feature-icon-wrapper {
  width: 46px;
  height: 46px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  background-color: var(--primary-light);
  color: var(--primary);
}

.feature-icon-wrapper.green {
  background-color: var(--secondary-light);
  color: var(--secondary);
}

.feature-icon-wrapper.amber {
  background-color: var(--accent-light);
  color: var(--accent);
}

.feature-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-main);
}

.feature-text {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.58;
}

/* FAQ Section */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 860px;
  margin: 0 auto;
}

.faq-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition-fast);
}

.faq-card:hover {
  border-color: var(--border-highlight);
}

.faq-question {
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 10px;
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.faq-badge {
  font-size: 0.82rem;
  font-weight: 800;
  color: var(--primary);
  background-color: var(--primary-light);
  padding: 2px 8px;
  border-radius: 6px;
  flex-shrink: 0;
}

.faq-answer {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.68;
  padding-left: 32px;
}

/* Support & Contact Card */
.support-card {
  background: linear-gradient(180deg, #FFFFFF 0%, var(--primary-subtle) 100%);
  border: 1px solid rgba(43, 140, 238, 0.25);
  border-radius: var(--radius-lg);
  padding: 38px 34px;
  box-shadow: var(--shadow-md);
  margin-bottom: 24px;
}

.support-title {
  font-size: 1.5rem;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-main);
}

.support-desc {
  font-size: 1.02rem;
  color: var(--text-secondary);
  margin-bottom: 22px;
}

.email-box {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background-color: #FFFFFF;
  border: 1px solid var(--border);
  padding: 12px 22px;
  border-radius: var(--radius-md);
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 24px;
  box-shadow: var(--shadow-xs);
  flex-wrap: wrap;
}

.email-box span {
  color: var(--text-main);
}

.email-box a {
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 4px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

.checklist-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-main);
}

.report-checklist {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 12px;
}

.report-checklist li {
  background-color: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  font-size: 0.92rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 10px;
}

.report-checklist li::before {
  content: "✓";
  font-weight: 800;
  color: var(--secondary);
  flex-shrink: 0;
}

/* Legal / Policy / Terms Article Pages */
.legal-page {
  padding: 44px 0 64px;
}

.legal-header {
  text-align: center;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 36px;
}

.legal-date {
  font-size: 0.92rem;
  color: var(--text-muted);
  margin-top: 10px;
}

.legal-content {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 44px;
  box-shadow: var(--shadow-sm);
}

.legal-section {
  margin-bottom: 34px;
}

.legal-section:last-child {
  margin-bottom: 0;
}

.legal-section h2 {
  font-size: 1.35rem;
  margin-bottom: 14px;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-light);
}

.legal-section p {
  font-size: 0.98rem;
  margin-bottom: 12px;
  color: var(--text-secondary);
  line-height: 1.72;
}

.legal-section ul {
  padding-left: 24px;
  margin-bottom: 14px;
}

.legal-section li {
  font-size: 0.96rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
  line-height: 1.65;
}

.legal-section strong {
  color: var(--text-main);
}

/* Callout Highlights */
.callout {
  background-color: var(--secondary-light);
  border-left: 4px solid var(--secondary);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  margin: 20px 0;
}

.callout.blue {
  background-color: var(--primary-light);
  border-left-color: var(--primary);
}

.callout.amber {
  background-color: var(--accent-light);
  border-left-color: var(--accent);
}

.callout p {
  color: var(--text-main);
  font-size: 0.95rem;
  font-weight: 500;
  margin: 0;
}

/* Legal Table */
.legal-table-wrapper {
  overflow-x: auto;
  margin: 20px 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.legal-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.92rem;
}

.legal-table th {
  background-color: var(--bg-card-subtle);
  color: var(--text-main);
  font-weight: 700;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}

.legal-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-light);
  color: var(--text-secondary);
}

.legal-table tr:last-child td {
  border-bottom: none;
}

/* Site Footer */
.site-footer {
  margin-top: auto;
  background-color: #FFFFFF;
  border-top: 1px solid var(--border);
  padding: 36px 0;
  text-align: center;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.footer-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  list-style: none;
  flex-wrap: wrap;
}

.footer-links a {
  font-size: 0.92rem;
  color: var(--text-muted);
}

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

.footer-copy {
  font-size: 0.86rem;
  color: var(--text-light);
}

/* Responsive Media Queries */
@media (max-width: 820px) {
  .nav-container {
    height: auto;
    padding-top: 14px;
    padding-bottom: 14px;
    flex-wrap: wrap;
    gap: 12px;
  }
  
  .nav-right-wrapper {
    width: 100%;
    justify-content: space-between;
  }
  
  .nav-links {
    gap: 4px;
    flex-wrap: wrap;
  }
  
  .nav-links a {
    padding: 6px 10px;
    font-size: 0.88rem;
  }
  
  .hero-title {
    font-size: 2.2rem;
  }
  
  .legal-content {
    padding: 28px 22px;
  }
  
  .support-card {
    padding: 28px 22px;
  }
}

@media (max-width: 540px) {
  .hero-title {
    font-size: 1.85rem;
  }
  
  .hero-subtitle {
    font-size: 1.1rem;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  .btn {
    width: 100%;
  }
  
  .faq-answer {
    padding-left: 0;
    margin-top: 8px;
  }
  
  .email-box {
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }
  
  .footer-links {
    gap: 12px;
  }
}