/* ============================================================
   Canada28 棰勬祴骞冲彴 - 涓绘牱寮忚〃
   ============================================================ */

/* ---- CSS Custom Properties ---- */
:root {
  --primary: #4f46e5;
  --primary-dark: #4338ca;
  --primary-light: #6366f1;
  --secondary: #2563eb;
  --secondary-dark: #1d4ed8;
  --accent: #06b6d4;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  --white: #ffffff;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  --radius-sm: 0.375rem;
  --radius: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;
  --transition: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---- Base ---- */
html {
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC',
    'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial,
    sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* ---- Selection ---- */
::selection {
  background-color: var(--primary);
  color: var(--white);
}

/* ---- Scrollbar ---- */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--gray-100);
}

::-webkit-scrollbar-thumb {
  background: var(--gray-400);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--gray-500);
}

/* ---- Navbar ---- */
.navbar {
  transition: all var(--transition);
}

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

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  border-radius: var(--radius-full);
  transition: width var(--transition);
}

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

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

.nav-link.active {
  color: var(--primary);
}

.nav-link.active::after {
  width: 100%;
}

/* ---- Mobile Menu ---- */
.mobile-menu {
  display: none;
  animation: slideDown 0.3s ease-out;
}

.mobile-menu.open {
  display: block;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---- Hamburger ---- */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 2.5rem;
  height: 2.5rem;
  cursor: pointer;
  background: transparent;
  border: none;
  padding: 0;
  z-index: 50;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--gray-800);
  border-radius: var(--radius-full);
  transition: all var(--transition);
  transform-origin: center;
}

.hamburger span:nth-child(2) {
  margin: 6px 0;
}

.hamburger.open span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.hamburger.open span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.hamburger.open span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }

  .desktop-nav {
    display: none;
  }
}

/* ---- Hero ---- */
.hero-gradient {
  background: linear-gradient(135deg, #eef2ff 0%, #ffffff 50%, #eff6ff 100%);
  position: relative;
  overflow: hidden;
}

.hero-gradient::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 70%;
  height: 200%;
  background: radial-gradient(ellipse at center,
    rgba(79, 70, 229, 0.06) 0%,
    transparent 70%);
  pointer-events: none;
}

.hero-gradient::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 60%;
  height: 160%;
  background: radial-gradient(ellipse at center,
    rgba(37, 99, 235, 0.05) 0%,
    transparent 70%);
  pointer-events: none;
}

/* ---- Card Hover ---- */
.card-hover {
  transition: transform var(--transition), box-shadow var(--transition),
    border-color var(--transition);
}

.card-hover:hover {
  transform: translateY(-0.5rem);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-light);
}

/* ---- Feature Icon Container ---- */
.feature-icon-wrapper {
  width: 4rem;
  height: 4rem;
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #eef2ff, #e0e7ff);
  font-size: 1.5rem;
  color: var(--primary);
  transition: all var(--transition);
}

.card-hover:hover .feature-icon-wrapper {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: var(--white);
  transform: scale(1.1);
}

/* ---- Stats ---- */
.stat-number {
  font-variant-numeric: tabular-nums;
  transition: color var(--transition);
}

/* ---- Testimonials ---- */
.testimonial-card {
  position: relative;
  overflow: hidden;
}

.testimonial-card::before {
  content: '\201C';
  position: absolute;
  top: 0.5rem;
  right: 1.5rem;
  font-size: 5rem;
  line-height: 1;
  color: var(--primary);
  opacity: 0.08;
  font-family: Georgia, serif;
  pointer-events: none;
}

/* ---- FAQ Accordion ---- */
.accordion-item {
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-xl);
  overflow: hidden;
  margin-bottom: 0.75rem;
  background: var(--white);
  transition: all var(--transition);
}

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

.accordion-header {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  background: transparent;
  border: none;
  cursor: pointer;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--gray-800);
  text-align: left;
  transition: color var(--transition);
}

.accordion-header:hover {
  color: var(--primary);
}

.accordion-header i {
  transition: transform var(--transition-slow);
  font-size: 0.9rem;
  color: var(--gray-400);
  flex-shrink: 0;
  margin-left: 1rem;
}

.accordion-item.active .accordion-header i {
  transform: rotate(180deg);
  color: var(--primary);
}

.accordion-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow), padding var(--transition-slow);
}

.accordion-item.active .accordion-body {
  max-height: 500px;
}

.accordion-content {
  padding: 0 1.5rem 1.25rem;
  color: var(--gray-600);
  line-height: 1.7;
}

/* ---- CTA Section ---- */
.cta-section {
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg,
    rgba(79, 70, 229, 0.95) 0%,
    rgba(67, 56, 202, 0.98) 50%,
    rgba(37, 99, 235, 0.95) 100%);
  z-index: 0;
}

.cta-section .cta-content {
  position: relative;
  z-index: 1;
}

.cta-pattern {
  position: absolute;
  inset: 0;
  opacity: 0.06;
  background-image: radial-gradient(circle at 1px 1px, white 1px, transparent 1px);
  background-size: 24px 24px;
  z-index: 0;
}

/* ---- Footer ---- */
.footer-link {
  color: var(--gray-400);
  transition: color var(--transition);
}

.footer-link:hover {
  color: var(--white);
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  border-radius: var(--radius-full);
  padding: 0.75rem 2rem;
  transition: all var(--transition);
  cursor: pointer;
  text-decoration: none;
  border: 2px solid transparent;
  white-space: nowrap;
}

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

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

.btn-secondary {
  background: transparent;
  color: var(--primary);
  border-color: var(--primary);
}

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

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

.btn-white:hover {
  background: var(--gray-100);
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
}

.btn-lg {
  padding: 1rem 2.5rem;
  font-size: 1.1rem;
}

/* ---- Form Elements ---- */
.form-input {
  width: 100%;
  padding: 0.875rem 1.25rem;
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-xl);
  font-size: 1rem;
  color: var(--gray-800);
  background: var(--white);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}

.form-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.1);
}

.form-input::placeholder {
  color: var(--gray-400);
}

.form-label {
  display: block;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 0.5rem;
  font-size: 0.95rem;
}

textarea.form-input {
  resize: vertical;
  min-height: 120px;
}

/* ---- Animations ---- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes countUp {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse-dot {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.4;
  }
}

@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

.animate-fade-in-up {
  animation: fadeInUp 0.6s ease-out forwards;
}

.animate-fade-in {
  animation: fadeIn 0.6s ease-out forwards;
}

.animate-delay-100 { animation-delay: 0.1s; }
.animate-delay-200 { animation-delay: 0.2s; }
.animate-delay-300 { animation-delay: 0.3s; }
.animate-delay-400 { animation-delay: 0.4s; }
.animate-delay-500 { animation-delay: 0.5s; }

/* ---- Back to Top ---- */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 3rem;
  height: 3rem;
  border-radius: var(--radius-full);
  background: var(--primary);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border: none;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition);
  z-index: 40;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--primary-dark);
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

/* ---- Team Cards (About Page) ---- */
.team-card .team-avatar {
  transition: transform var(--transition);
}

.team-card:hover .team-avatar {
  transform: scale(1.05);
}

/* ---- Contact Info Cards ---- */
.contact-info-card:hover .contact-icon {
  background: var(--primary);
  color: var(--white);
}

.contact-icon {
  transition: all var(--transition);
}

/* ---- Success Toast ---- */
.toast {
  position: fixed;
  top: 2rem;
  right: 2rem;
  background: var(--success);
  color: var(--white);
  padding: 1rem 1.5rem;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  z-index: 100;
  font-weight: 600;
  transform: translateX(120%);
  transition: transform var(--transition-slow);
}

.toast.show {
  transform: translateX(0);
}

/* ---- Gradient Text ---- */
.gradient-text {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ---- Divider ---- */
.section-divider {
  width: 5rem;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  border-radius: var(--radius-full);
  margin: 0 auto;
}

/* ---- Badge ---- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.875rem;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.025em;
}

.badge-primary {
  background: rgba(79, 70, 229, 0.1);
  color: var(--primary);
}

.badge-success {
  background: rgba(16, 185, 129, 0.1);
  color: var(--success);
}

/* ---- Page Hero (inner pages) ---- */
.page-hero {
  padding-top: 6rem;
  padding-bottom: 4rem;
}

/* ---- Responsive ---- */
@media (max-width: 768px) {
  .btn {
    padding: 0.625rem 1.5rem;
    font-size: 0.95rem;
  }

  .btn-lg {
    padding: 0.875rem 2rem;
    font-size: 1rem;
  }

  .hero-gradient {
    min-height: auto;
    padding-top: 6rem;
    padding-bottom: 3rem;
  }

  .back-to-top {
    bottom: 1rem;
    right: 1rem;
    width: 2.5rem;
    height: 2.5rem;
  }

  .accordion-header {
    padding: 1rem 1.25rem;
    font-size: 0.95rem;
  }
}
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