:root {
  /* Color system */
  --color-primary: #3B82F6;
  --color-primary-light: #60A5FA;
  --color-primary-dark: #2563EB;
  
  --color-secondary: #64748B;
  --color-secondary-light: #94A3B8;
  --color-secondary-dark: #475569;
  
  --color-accent: #10B981;
  --color-accent-light: #34D399;
  --color-accent-dark: #059669;
  
  --color-success: #10B981;
  --color-warning: #F59E0B;
  --color-error: #EF4444;
  
  --color-bg: #F9FAFB;
  --color-white: #FFFFFF;
  --color-black: #111827;
  --color-gray-50: #F9FAFB;
  --color-gray-100: #F3F4F6;
  --color-gray-200: #E5E7EB;
  --color-gray-300: #D1D5DB;
  --color-gray-400: #9CA3AF;
  --color-gray-500: #6B7280;
  --color-gray-600: #4B5563;
  --color-gray-700: #374151;
  --color-gray-800: #1F2937;
  --color-gray-900: #111827;
  
  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
  
  /* Spacing system (based on 8px) */
  --space-1: 0.25rem;  /* 4px */
  --space-2: 0.5rem;   /* 8px */
  --space-3: 0.75rem;  /* 12px */
  --space-4: 1rem;     /* 16px */
  --space-5: 1.25rem;  /* 20px */
  --space-6: 1.5rem;   /* 24px */
  --space-8: 2rem;     /* 32px */
  --space-10: 2.5rem;  /* 40px */
  --space-12: 3rem;    /* 48px */
  --space-16: 4rem;    /* 64px */
  --space-20: 5rem;    /* 80px */
  --space-24: 6rem;    /* 96px */
  
  /* Border radius */
  --radius-sm: 0.125rem;
  --radius-md: 0.25rem;
  --radius-lg: 0.5rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

/* Reset and base styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  line-height: 1.5;
  color: var(--color-gray-800);
  background-color: var(--color-bg);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  line-height: 1.2;
  margin-bottom: var(--space-4);
  color: var(--color-gray-900);
  font-weight: 700;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  line-height: 1.1;
}

h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  margin-bottom: var(--space-6);
}

h3 {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  margin-bottom: var(--space-3);
}

h4 {
  font-size: 1.25rem;
  margin-bottom: var(--space-2);
}

p {
  margin-bottom: var(--space-4);
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-12);
}

.section-header p {
  font-size: 1.25rem;
  color: var(--color-gray-600);
  max-width: 600px;
  margin: 0 auto;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: 1rem;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s ease;
  border: none;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-white);
  box-shadow: var(--shadow-md);
}

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

.btn-primary:disabled {
  background-color: var(--color-gray-400);
  cursor: not-allowed;
  transform: none;
  box-shadow: var(--shadow-sm);
}

.btn-primary.loading {
  background-color: var(--color-gray-400);
  cursor: wait;
}

.btn-primary.loading i {
  animation: spin 1s linear infinite;
}

.btn-secondary {
  background-color: var(--color-white);
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}

.btn-secondary:hover {
  background-color: var(--color-gray-50);
  color: var(--color-primary-dark);
  transform: translateY(-2px);
}

/* Header & Navigation */
header {
  background-color: var(--color-white);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 100;
  padding: var(--space-4) 0;
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--color-primary);
}

.logo i {
  margin-right: var(--space-2);
}

.nav-links {
  display: flex;
  gap: var(--space-6);
}

.nav-links a {
  color: var(--color-gray-700);
  font-weight: 500;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: width 0.3s ease;
}

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

.nav-links a:hover::after {
  width: 100%;
}

.nav-links.active {
  display: flex;
  flex-direction: column;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background-color: var(--color-white);
  padding: var(--space-6);
  box-shadow: var(--shadow-md);
  z-index: 50;
}

.mobile-menu {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--color-gray-700);
  cursor: pointer;
}

/* Hero Section */
.hero {
  padding: var(--space-20) 0;
  background-color: var(--color-white);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.05) 0%, rgba(16, 185, 129, 0.05) 100%);
  z-index: 0;
}

.hero .container {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
}

.hero-content {
  flex: 1;
}

.hero h1 {
  margin-bottom: var(--space-4);
  color: var(--color-gray-900);
}

.subtitle {
  font-size: clamp(1.125rem, 2vw, 1.5rem);
  color: var(--color-gray-600);
  margin-bottom: var(--space-8);
}

.hero-actions {
  display: flex;
  gap: var(--space-4);
}

.hero-image {
  flex: 1;
}

.hero-image img {
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
}

/* Concern Section */
.concern {
  padding: var(--space-16) 0;
  background-color: var(--color-gray-50);
}

.cards {
  display: flex;
  justify-content: center;
  gap: var(--space-6);
  flex-wrap: wrap;
}

.card {
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  box-shadow: var(--shadow-md);
  max-width: 350px;
  flex: 1;
  min-width: 280px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.card-icon {
  background-color: var(--color-primary-light);
  color: var(--color-white);
  width: 60px;
  height: 60px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: var(--space-4);
}

.card h3 {
  font-size: 1.25rem;
  margin-bottom: var(--space-2);
}

.card p {
  color: var(--color-gray-600);
  margin-bottom: var(--space-4);
}

/* Services Section */
.services {
  padding: var(--space-16) 0;
  background-color: var(--color-white);
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-6);
}

.service-item {
  padding: var(--space-6);
  border-radius: var(--radius-lg);
  background-color: var(--color-gray-50);
  transition: transform 0.3s ease;
}

.service-item:hover {
  transform: translateY(-5px);
}

.service-item i {
  font-size: 2rem;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

.service-item h3 {
  margin-bottom: var(--space-2);
}

.service-item p {
  color: var(--color-gray-600);
  margin-bottom: 0;
}

/* About Section */
.about {
  padding: var(--space-16) 0;
  background-color: var(--color-gray-50);
}

.about .container {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.about-content {
  flex: 1;
}

.team-images {
  flex: 1;
}

.team-images img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

/* Contact Section */
.contact {
  padding: var(--space-16) 0;
  background-color: var(--color-white);
}

.contact-container-centered {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 60vh;
}

.main-contact-card {
  background-color: var(--color-gray-50);
  border-radius: var(--radius-xl);
  padding: var(--space-12);
  box-shadow: var(--shadow-xl);
  max-width: 600px;
  width: 100%;
  text-align: center;
  border: 3px solid #25D366;
  position: relative;
  overflow: hidden;
}

.main-contact-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, #25D366, #128C7E);
}

.contact-header {
  margin-bottom: var(--space-8);
}

.contact-main-icon {
  font-size: 4rem;
  color: #25D366;
  margin-bottom: var(--space-4);
  display: block;
}

.contact-header h3 {
  font-size: 2rem;
  color: var(--color-gray-900);
  margin-bottom: var(--space-3);
}

.contact-header p {
  font-size: 1.25rem;
  color: var(--color-gray-600);
  margin-bottom: 0;
}

.contact-features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-6);
  margin-bottom: var(--space-10);
  text-align: left;
}

.feature-item {
  display: flex;
  align-items: flex-start;
  padding: var(--space-4);
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

.feature-item i {
  font-size: 1.5rem;
  color: var(--color-primary);
  margin-right: var(--space-4);
  margin-top: var(--space-1);
  flex-shrink: 0;
}

.feature-item h4 {
  font-size: 1.125rem;
  color: var(--color-gray-900);
  margin-bottom: var(--space-1);
  font-weight: 600;
}

.feature-item p {
  color: var(--color-gray-600);
  margin-bottom: 0;
  font-size: 0.95rem;
}

.contact-action {
  text-align: center;
}

.btn-whatsapp-main {
  background: linear-gradient(135deg, #25D366, #128C7E);
  color: var(--color-white);
  padding: var(--space-4) var(--space-8);
  font-size: 1.25rem;
  font-weight: 700;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
  text-decoration: none;
  min-width: 280px;
  justify-content: center;
}

.btn-whatsapp-main:hover {
  background: linear-gradient(135deg, #128C7E, #25D366);
  color: var(--color-white);
  transform: translateY(-3px);
  box-shadow: var(--shadow-xl);
}

.btn-whatsapp-main:disabled {
  background: var(--color-gray-400);
  cursor: not-allowed;
  transform: none;
  box-shadow: var(--shadow-sm);
}

.btn-whatsapp-main i {
  font-size: 1.5rem;
}

.btn-whatsapp-main.loading {
  background: var(--color-gray-400);
  cursor: wait;
}

.btn-whatsapp-main.loading i {
  animation: spin 1s linear infinite;
}

.contact-note {
  font-size: 0.9rem;
  color: var(--color-gray-600);
  margin-top: var(--space-4);
  margin-bottom: 0;
  font-style: italic;
}

/* Footer */
footer {
  background-color: var(--color-gray-900);
  color: var(--color-gray-200);
  padding: var(--space-12) 0 var(--space-6);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  margin-bottom: var(--space-12);
}

.footer-logo {
  display: flex;
  align-items: center;
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--color-white);
}

.footer-logo i {
  margin-right: var(--space-2);
}

.footer-links {
  display: flex;
  gap: var(--space-12);
}

.link-group h4 {
  color: var(--color-white);
  margin-bottom: var(--space-4);
}

.link-group a {
  display: block;
  color: var(--color-gray-400);
  margin-bottom: var(--space-2);
  transition: color 0.2s ease;
}

.link-group a:hover {
  color: var(--color-primary-light);
}

.footer-bottom {
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-gray-800);
  text-align: center;
  font-size: 0.875rem;
  color: var(--color-gray-500);
}

/* Media Queries */
@media (max-width: 968px) {
  .hero .container {
    flex-direction: column;
  }
  
  .hero-content {
    text-align: center;
  }
  
  .hero-actions {
    justify-content: center;
  }
  
  .about .container {
    flex-direction: column;
  }
  
  .about-content {
    text-align: center;
  }
  
  .contact-container-centered {
    min-height: auto;
    padding: var(--space-4);
  }
  
  .footer-content {
    flex-direction: column;
    gap: var(--space-8);
  }
  
  .footer-logo {
    margin-bottom: var(--space-6);
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  
  .mobile-menu {
    display: block;
  }
  
  .nav-links.active {
    gap: var(--space-4);
  }
  
  .nav-links.active a {
    padding: var(--space-2) 0;
  }
  
  .cards {
    flex-direction: column;
    align-items: center;
  }
  
  .card {
    width: 100%;
  }
  
  .service-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-links {
    flex-direction: column;
    gap: var(--space-6);
  }
  
  /* Mobile optimization for new contact layout */
  .main-contact-card {
    padding: var(--space-8);
    margin: var(--space-4);
  }
  
  .contact-header h3 {
    font-size: 1.75rem;
  }
  
  .contact-features {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }
  
  .btn-whatsapp-main {
    width: 100%;
    font-size: 1.1rem;
    padding: var(--space-4);
  }
  
  .contact-main-icon {
    font-size: 3rem;
  }
}

.important-notice {
  display: flex;
  align-items: flex-start;
  background-color: rgba(255, 193, 7, 0.1);
  padding: var(--space-4);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-6);
  border-left: 4px solid #ffc107;
}

.important-notice i {
  color: #ffc107;
  margin-right: var(--space-3);
  font-size: 1.25rem;
}

.important-notice p {
  font-size: 0.95rem;
  color: var(--color-gray-800);
  margin-bottom: 0;
}

.video-container {
  position: relative;
  width: 100%;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.video-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.3);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1;
  transition: background-color 0.3s ease;
}

.video-overlay:hover {
  background-color: rgba(0, 0, 0, 0.2);
}

.play-button {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background-color: var(--color-primary);
  border: none;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  transition: transform 0.3s ease, background-color 0.3s ease;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.play-button:hover {
  transform: scale(1.1);
  background-color: var(--color-primary-dark);
}

.play-button i {
  color: white;
  font-size: 1.5rem;
  margin-left: 5px;
}

#heroVideo {
  width: 100%;
  display: block;
  border-radius: var(--radius-lg);
}
/* 视频播放按钮样式 */
.hero-image {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.video-play-button {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 80px;
  height: 80px;
  background-color: rgba(59, 130, 246, 0.8);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s ease;
  z-index: 5;
}

.video-play-button i {
  color: white;
  font-size: 2rem;
}

.video-play-button:hover {
  background-color: var(--color-primary);
  transform: translate(-50%, -50%) scale(1.1);
}

/* 视频模态框样式 */
.video-modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.9);
}

.video-modal-content {
  position: relative;
  margin: auto;
  width: 80%;
  max-width: 900px;
  top: 50%;
  transform: translateY(-50%);
}

.close-modal {
  position: absolute;
  top: -40px;
  right: 0;
  color: white;
  font-size: 2rem;
  font-weight: bold;
  cursor: pointer;
}

#modalVideo {
  width: 100%;
  border-radius: var(--radius-lg);
}
/* Fraud Stats Section */
.fraud-stats {
  padding: var(--space-16) 0;
  background-color: var(--color-gray-50);
  background-image: linear-gradient(135deg, rgba(59, 130, 246, 0.05) 0%, rgba(16, 185, 129, 0.05) 100%);
}

.stats-dashboard {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-6);
  margin-bottom: var(--space-8);
}

.stats-card {
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: flex-start;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  overflow: hidden;
  position: relative;
}

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

.stats-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.stats-icon {
  background-color: rgba(59, 130, 246, 0.1);
  color: var(--color-primary);
  width: 50px;
  height: 50px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-right: var(--space-4);
  flex-shrink: 0;
}

.stats-content {
  flex: 1;
}

.stats-number {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: var(--space-2);
  display: flex;
  align-items: baseline;
}

.stats-number span {
  font-size: 1rem;
  margin-left: var(--space-1);
  color: var(--color-gray-600);
}

.stats-label {
  font-size: 1rem;
  color: var(--color-gray-700);
  margin-bottom: var(--space-2);
  font-weight: 500;
}

.stats-change {
  font-size: 0.875rem;
  display: flex;
  align-items: center;
}

.stats-change i {
  margin-right: var(--space-1);
}

.stats-change.increase {
  color: var(--color-accent);
}

.stats-change.decrease {
  color: var(--color-error);
}

.stats-source {
  text-align: center;
  font-size: 0.875rem;
  color: var(--color-gray-600);
  font-style: italic;
}

@media (max-width: 768px) {
  .stats-dashboard {
    grid-template-columns: 1fr;
  }
}