/* ========================================
   启迪港云课堂 - 公共样式
   WisPort CloudLearn - Common Styles
   ======================================== */

/* CSS Variables */
:root {
  /* Colors */
  --primary: #2467ec;
  --primary-dark: #1a5ad1;
  --secondary: #ffb700;
  --tertiary: #ff2f2f;
  --black: #222222;
  --white: #ffffff;
  --gray-1: #f8f8f8;
  --gray-2: #e6e6e6;
  --gray-3: #999999;
  --gray-4: #606060;
  
  /* Easing Functions */
  --ease-expo-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-expo-in: cubic-bezier(0.7, 0, 0.84, 0);
  --ease-elastic: cubic-bezier(0.68, -0.55, 0.265, 1.55);
  --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-dramatic: cubic-bezier(0.87, 0, 0.13, 1);
  --ease-spring: cubic-bezier(0.175, 0.885, 0.32, 1.275);
  --ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
  
  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  
  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.12);
  --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.15);
  --shadow-primary: 0 4px 20px rgba(36, 103, 236, 0.3);
  --shadow-primary-lg: 0 10px 40px rgba(36, 103, 236, 0.4);
  
  /* Transitions */
  --transition-fast: 200ms;
  --transition-normal: 300ms;
  --transition-slow: 500ms;
}

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

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

body {
  font-family: var(--font-family);
  font-size: 14px;
  line-height: 1.6;
  color: var(--black);
  background-color: var(--white);
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
  transition: color var(--transition-fast) var(--ease-smooth);
}

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

ul, ol {
  list-style: none;
}

button {
  border: none;
  background: none;
  cursor: pointer;
  font-family: inherit;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.3;
}

h1 { font-size: 38px; line-height: 44px; }
h2 { font-size: 32px; line-height: 36px; }
h3 { font-size: 24px; line-height: 30px; }
h4 { font-size: 18px; line-height: 24px; }
h5 { font-size: 14px; line-height: 20px; }
h6 { font-size: 12px; line-height: 18px; }

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.container-fluid {
  width: 100%;
  padding: 0 20px;
}

/* Section Base */
.section {
  padding: 100px 0;
  position: relative;
}

.section-title {
  font-size: 32px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 16px;
  color: var(--black);
}

.section-subtitle {
  font-size: 16px;
  color: var(--gray-4);
  text-align: center;
  margin-bottom: 48px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-size: 14px;
  font-weight: 600;
  border-radius: 8px;
  transition: all var(--transition-fast) var(--ease-smooth);
  cursor: pointer;
}

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

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

.btn-secondary {
  background: var(--secondary);
  color: var(--black);
}

.btn-secondary:hover {
  background: #e6a600;
  transform: translateY(-2px);
}

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

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

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

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

.btn-lg {
  padding: 16px 40px;
  font-size: 16px;
}

/* Cards */
.card {
  background: var(--white);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal) var(--ease-expo-out);
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

/* Grid System */
.grid {
  display: grid;
  gap: 24px;
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-5 { grid-template-columns: repeat(5, 1fr); }

/* Flex Utilities */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.flex-wrap { flex-wrap: wrap; }
.gap-4 { gap: 4px; }
.gap-8 { gap: 8px; }
.gap-12 { gap: 12px; }
.gap-16 { gap: 16px; }
.gap-24 { gap: 24px; }
.gap-32 { gap: 32px; }

/* Spacing */
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mt-48 { margin-top: 48px; }

.mb-8 { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.mb-32 { margin-bottom: 32px; }
.mb-48 { margin-bottom: 48px; }

/* Text Utilities */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-primary { color: var(--primary); }
.text-secondary { color: var(--secondary); }
.text-gray { color: var(--gray-3); }
.text-dark { color: var(--gray-4); }

.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

/* Backgrounds */
.bg-white { background-color: var(--white); }
.bg-gray { background-color: var(--gray-1); }
.bg-primary { background-color: var(--primary); }
.bg-dark { background-color: var(--black); }

/* Badge */
.badge {
  display: inline-block;
  padding: 4px 12px;
  font-size: 12px;
  font-weight: 600;
  border-radius: 20px;
  background: var(--primary);
  color: var(--white);
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 70px;
  z-index: 1000;
  transition: all var(--transition-normal) var(--ease-smooth);
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
}

.navbar.transparent {
  background: transparent;
  backdrop-filter: none;
  box-shadow: none;
}

.navbar.transparent .nav-link {
  color: var(--white);
}

.navbar.transparent .nav-link:hover {
  color: var(--secondary);
}

.navbar.transparent .nav-link::after {
  background: var(--secondary);
}

.navbar.transparent .nav-dropdown-toggle {
  color: var(--white);
}

.navbar.transparent .nav-dropdown-toggle:hover {
  color: var(--secondary);
}

.navbar.transparent .mobile-menu-btn span {
  background: var(--white);
}

.navbar .container {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  display: flex;
  align-items: center;
}

.nav-logo {
  height: 40px;
  transition: transform var(--transition-fast) var(--ease-smooth);
  filter: drop-shadow(0 2px 4px rgba(0,0,0,0.1));
}

.navbar.transparent .nav-logo {
  filter: drop-shadow(0 2px 6px rgba(0,0,0,0.2));
}

.nav-logo:hover {
  transform: scale(1.02);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--black);
  position: relative;
  transition: color var(--transition-fast);
  white-space: nowrap;
  line-height: 1;
  padding: 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: all var(--transition-fast) var(--ease-expo-out);
  transform: translateX(-50%);
}

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

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Nav Buttons */
.nav-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 20px;
  font-size: 13px;
  font-weight: 600;
  border-radius: 6px;
  transition: all var(--transition-fast) var(--ease-smooth);
  cursor: pointer;
  white-space: nowrap;
}

.nav-btn-primary {
  background: var(--primary);
  color: var(--white);
  border: none;
}

.nav-btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-primary);
}

.nav-btn-outline {
  background: transparent;
  color: var(--black);
  border: 1px solid var(--gray-2);
}

.nav-btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.navbar.transparent .nav-btn-outline {
  color: var(--white);
  border-color: rgba(255,255,255,0.5);
}

.navbar.transparent .nav-btn-outline:hover {
  background: rgba(255,255,255,0.1);
  border-color: var(--white);
}

/* Dropdown Menu */
.nav-dropdown {
  position: relative;
}

.nav-dropdown-toggle {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 13px;
  font-weight: 500;
  color: var(--black);
  cursor: pointer;
  padding: 0;
  line-height: 1;
}

.navbar.transparent .nav-dropdown-toggle {
  color: var(--white);
}

.nav-dropdown-toggle i {
  font-size: 10px;
  transition: transform var(--transition-fast);
}

.nav-dropdown:hover .nav-dropdown-toggle i {
  transform: rotate(180deg);
}

.nav-dropdown-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  background: var(--white);
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
  padding: 12px 0;
  min-width: 160px;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
  z-index: 1001;
}

.nav-dropdown:hover .nav-dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.nav-dropdown-item {
  display: block;
  padding: 10px 20px;
  font-size: 13px;
  color: var(--gray-4);
  transition: all var(--transition-fast);
}

.nav-dropdown-item:hover {
  background: var(--gray-1);
  color: var(--primary);
}

/* Mobile Menu */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}

.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  transition: all var(--transition-fast);
}

.navbar.scrolled .mobile-menu-btn span {
  background: var(--black);
}

/* Footer */
.footer {
  background: var(--black);
  color: var(--white);
  padding: 80px 0 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.5fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand .logo {
  height: 40px;
  margin-bottom: 16px;
}

.footer-brand p {
  color: var(--gray-3);
  font-size: 14px;
  line-height: 1.8;
}

.footer-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 20px;
  color: var(--white);
}

.footer-links li {
  margin-bottom: 12px;
}

.footer-links a {
  color: var(--gray-3);
  font-size: 14px;
  transition: all var(--transition-fast);
  display: inline-block;
}

.footer-links a:hover {
  color: var(--white);
  transform: translateX(5px);
}

.footer-contact li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 16px;
  color: var(--gray-3);
  font-size: 14px;
}

.footer-contact i {
  color: var(--primary);
  margin-top: 3px;
}

.footer-bottom {
  border-top: 1px solid #333;
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-copyright {
  color: var(--gray-3);
  font-size: 14px;
}

.footer-social {
  display: flex;
  gap: 12px;
}

.footer-social a {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: #333;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  transition: all var(--transition-fast) var(--ease-spring);
}

.footer-social a:hover {
  background: var(--primary);
  transform: translateY(-5px) scale(1.1);
}

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

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

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.8);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes slideInUp {
  from {
    transform: translateY(100%);
  }
  to {
    transform: translateY(0);
  }
}

@keyframes gentleFloat {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-15px) rotate(2deg); }
}

@keyframes pulseGlow {
  0%, 100% { box-shadow: 0 0 20px rgba(36, 103, 236, 0.3); }
  50% { box-shadow: 0 0 40px rgba(36, 103, 236, 0.6); }
}

@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

@keyframes countUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Animation Classes */
.animate-fadeIn { animation: fadeIn 0.6s var(--ease-expo-out) forwards; }
.animate-fadeInUp { animation: fadeInUp 0.6s var(--ease-expo-out) forwards; }
.animate-fadeInDown { animation: fadeInDown 0.6s var(--ease-expo-out) forwards; }
.animate-fadeInLeft { animation: fadeInLeft 0.6s var(--ease-expo-out) forwards; }
.animate-fadeInRight { animation: fadeInRight 0.6s var(--ease-expo-out) forwards; }
.animate-scaleIn { animation: scaleIn 0.5s var(--ease-spring) forwards; }

/* Stagger Animation Delays */
.stagger-1 { animation-delay: 0.1s; }
.stagger-2 { animation-delay: 0.2s; }
.stagger-3 { animation-delay: 0.3s; }
.stagger-4 { animation-delay: 0.4s; }
.stagger-5 { animation-delay: 0.5s; }
.stagger-6 { animation-delay: 0.6s; }

/* Scroll Reveal */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: all 0.6s var(--ease-expo-out);
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

/* Particle Canvas */
.particles-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

/* Gradient Background */
.gradient-bg {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 50%, var(--primary) 100%);
  background-size: 200% 200%;
  animation: gradientShift 8s ease infinite;
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: 80px;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 600px;
}

.hero-title {
  font-size: 48px;
  line-height: 1.2;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 20px;
}

.hero-title .highlight {
  color: var(--secondary);
}

.hero-desc {
  font-size: 18px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 32px;
}

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

.hero-search {
  display: flex;
  max-width: 480px;
  margin-bottom: 24px;
}

.hero-search input {
  flex: 1;
  padding: 16px 20px;
  border: none;
  border-radius: 8px 0 0 8px;
  font-size: 14px;
  outline: none;
}

.hero-search button {
  padding: 16px 24px;
  background: var(--secondary);
  color: var(--black);
  border: none;
  border-radius: 0 8px 8px 0;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition-fast);
}

.hero-search button:hover {
  background: #e6a600;
}

/* Stats Section */
.stats {
  background: var(--white);
  padding: 80px 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
}

.stats-item {
  text-align: center;
  padding: 24px;
  position: relative;
}

.stats-item:not(:last-child)::after {
  content: '';
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 1px;
  height: 60px;
  background: var(--gray-2);
}

.stats-number {
  font-size: 42px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 8px;
  font-family: 'Inter', monospace;
}

.stats-label {
  font-size: 14px;
  color: var(--gray-4);
}

/* Feature Cards */
.feature-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--white);
  border-radius: 16px;
  padding: 32px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal) var(--ease-expo-out);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-normal) var(--ease-expo-out);
}

.feature-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
}

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

.feature-icon {
  width: 64px;
  height: 64px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--white);
  font-size: 28px;
}

.feature-title {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--black);
}

.feature-desc {
  font-size: 14px;
  color: var(--gray-4);
  line-height: 1.7;
}

/* Course Cards */
.course-card {
  background: var(--white);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal) var(--ease-expo-out);
}

.course-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
}

.course-image {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4/3;
}

.course-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow) var(--ease-expo-out);
}

.course-card:hover .course-image img {
  transform: scale(1.1);
}

.course-category {
  position: absolute;
  top: 12px;
  left: 12px;
  padding: 6px 14px;
  background: var(--primary);
  color: var(--white);
  font-size: 12px;
  font-weight: 600;
  border-radius: 20px;
}

.course-content {
  padding: 20px;
}

.course-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--black);
  line-height: 1.5;
}

.course-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.course-instructor {
  font-size: 13px;
  color: var(--gray-4);
}

.course-rating {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 13px;
  color: var(--secondary);
}

.course-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 12px;
  border-top: 1px solid var(--gray-2);
}

.course-price {
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
}

.course-students {
  font-size: 13px;
  color: var(--gray-3);
}

/* Tabs */
.tabs {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.tab-btn {
  padding: 12px 24px;
  font-size: 14px;
  font-weight: 500;
  color: var(--gray-3);
  background: transparent;
  border-radius: 8px;
  transition: all var(--transition-fast);
  position: relative;
}

.tab-btn:hover {
  color: var(--primary);
}

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

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
  animation: fadeIn 0.4s var(--ease-expo-out);
}

/* Testimonials */
.testimonial-slider {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.testimonial-item {
  text-align: center;
  padding: 40px;
}

.testimonial-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  overflow: hidden;
  margin: 0 auto 24px;
  border: 4px solid var(--primary);
}

.testimonial-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.testimonial-text {
  font-size: 18px;
  line-height: 1.8;
  color: var(--gray-4);
  margin-bottom: 24px;
  font-style: italic;
}

.testimonial-author {
  font-size: 16px;
  font-weight: 600;
  color: var(--black);
}

.testimonial-role {
  font-size: 14px;
  color: var(--gray-3);
  margin-top: 4px;
}

/* Blog Cards */
.blog-card {
  background: var(--white);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal) var(--ease-expo-out);
}

.blog-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.blog-image {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4/3;
}

.blog-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow) var(--ease-expo-out);
}

.blog-card:hover .blog-image img {
  transform: scale(1.15);
}

.blog-category {
  position: absolute;
  top: 12px;
  left: 12px;
  padding: 6px 14px;
  background: var(--primary);
  color: var(--white);
  font-size: 12px;
  font-weight: 600;
  border-radius: 20px;
}

.blog-content {
  padding: 20px;
}

.blog-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--black);
  line-height: 1.5;
}

.blog-excerpt {
  font-size: 14px;
  color: var(--gray-4);
  line-height: 1.7;
  margin-bottom: 16px;
}

.blog-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: var(--gray-3);
}

/* CTA Section */
.cta-section {
  padding: 120px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-content {
  position: relative;
  z-index: 2;
}

.cta-title {
  font-size: 38px;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 16px;
}

.cta-desc {
  font-size: 18px;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 32px;
}

.cta-btn {
  padding: 16px 40px;
  background: var(--white);
  color: var(--primary);
  font-size: 16px;
  font-weight: 600;
  border-radius: 8px;
  transition: all var(--transition-fast) var(--ease-spring);
  animation: pulseGlow 3s ease infinite;
}

.cta-btn:hover {
  background: var(--secondary);
  color: var(--white);
  transform: translateY(-4px) scale(1.05);
}

/* Page Header */
.page-header {
  padding: 160px 0 80px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  text-align: center;
  color: var(--white);
}

.page-title {
  font-size: 42px;
  font-weight: 700;
  margin-bottom: 16px;
}

.page-desc {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.9);
  max-width: 600px;
  margin: 0 auto;
}

/* Breadcrumb */
.breadcrumb {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 24px;
  font-size: 14px;
}

.breadcrumb a {
  color: rgba(255, 255, 255, 0.8);
}

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

.breadcrumb-separator {
  color: rgba(255, 255, 255, 0.5);
}

.breadcrumb-current {
  color: var(--white);
}

/* Solution Cards */
.solution-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  margin-bottom: 80px;
}

.solution-card.reverse {
  direction: rtl;
}

.solution-card.reverse > * {
  direction: ltr;
}

.solution-image {
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.solution-image img {
  width: 100%;
  height: auto;
}

.solution-content {
  padding: 24px;
}

.solution-tag {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(36, 103, 236, 0.1);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  border-radius: 20px;
  margin-bottom: 16px;
}

.solution-title {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--black);
}

.solution-desc {
  font-size: 15px;
  color: var(--gray-4);
  line-height: 1.8;
  margin-bottom: 24px;
}

.solution-features {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.solution-feature {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  color: var(--gray-4);
}

.solution-feature i {
  color: var(--primary);
}

/* Pricing Cards */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.pricing-card {
  background: var(--white);
  border-radius: 16px;
  padding: 32px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal) var(--ease-expo-out);
  position: relative;
  border: 2px solid transparent;
}

.pricing-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
}

.pricing-card.featured {
  border-color: var(--primary);
  transform: scale(1.05);
}

.pricing-card.featured:hover {
  transform: scale(1.05) translateY(-10px);
}

.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  padding: 6px 16px;
  background: var(--primary);
  color: var(--white);
  font-size: 12px;
  font-weight: 600;
  border-radius: 20px;
}

.pricing-name {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 8px;
  text-align: center;
}

.pricing-price {
  font-size: 42px;
  font-weight: 700;
  color: var(--primary);
  text-align: center;
  margin-bottom: 8px;
}

.pricing-price span {
  font-size: 14px;
  font-weight: 400;
  color: var(--gray-3);
}

.pricing-desc {
  font-size: 13px;
  color: var(--gray-3);
  text-align: center;
  margin-bottom: 24px;
}

.pricing-features {
  margin-bottom: 24px;
}

.pricing-feature {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 0;
  font-size: 14px;
  color: var(--gray-4);
  border-bottom: 1px solid var(--gray-2);
}

.pricing-feature i {
  color: var(--primary);
  font-size: 12px;
}

.pricing-feature.disabled {
  color: var(--gray-3);
}

.pricing-feature.disabled i {
  color: var(--gray-3);
}

.pricing-btn {
  width: 100%;
  padding: 14px;
  text-align: center;
}

/* Partner Cards */
.partner-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.partner-card {
  background: var(--white);
  border-radius: 16px;
  padding: 32px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal) var(--ease-expo-out);
  text-align: center;
}

.partner-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.partner-icon {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  color: var(--white);
  font-size: 32px;
}

.partner-title {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
}

.partner-desc {
  font-size: 14px;
  color: var(--gray-4);
  line-height: 1.7;
  margin-bottom: 20px;
}

.partner-benefits {
  text-align: left;
}

.partner-benefit {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 0;
  font-size: 13px;
  color: var(--gray-4);
}

.partner-benefit i {
  color: var(--secondary);
}

/* Help Center */
.help-categories {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.help-card {
  background: var(--white);
  border-radius: 12px;
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal) var(--ease-expo-out);
  cursor: pointer;
}

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

.help-icon {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  background: rgba(36, 103, 236, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  color: var(--primary);
  font-size: 20px;
}

.help-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

.help-desc {
  font-size: 13px;
  color: var(--gray-3);
  line-height: 1.6;
}

/* FAQ */
.faq-item {
  background: var(--white);
  border-radius: 12px;
  margin-bottom: 12px;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
  cursor: pointer;
  transition: background var(--transition-fast);
}

.faq-question:hover {
  background: var(--gray-1);
}

.faq-question h4 {
  font-size: 15px;
  font-weight: 600;
}

.faq-question i {
  color: var(--gray-3);
  transition: transform var(--transition-fast);
}

.faq-item.active .faq-question i {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal) var(--ease-expo-out);
}

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

.faq-answer p {
  padding: 0 24px 20px;
  font-size: 14px;
  color: var(--gray-4);
  line-height: 1.7;
}

/* Case Studies */
.case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.case-card {
  background: var(--white);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal) var(--ease-expo-out);
}

.case-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.case-image {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16/10;
}

.case-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow) var(--ease-expo-out);
}

.case-card:hover .case-image img {
  transform: scale(1.1);
}

.case-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.7), transparent);
  display: flex;
  align-items: flex-end;
  padding: 20px;
}

.case-logo {
  height: 40px;
  filter: brightness(0) invert(1);
}

.case-content {
  padding: 24px;
}

.case-tag {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(36, 103, 236, 0.1);
  color: var(--primary);
  font-size: 12px;
  font-weight: 600;
  border-radius: 20px;
  margin-bottom: 12px;
}

.case-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--black);
}

.case-result {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--gray-4);
}

.case-result i {
  color: var(--secondary);
}

/* Tool Cards */
.tool-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.tool-card {
  background: var(--white);
  border-radius: 12px;
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal) var(--ease-expo-out);
  text-align: center;
}

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

.tool-icon {
  width: 56px;
  height: 56px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  color: var(--white);
  font-size: 24px;
}

.tool-name {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 8px;
}

.tool-desc {
  font-size: 13px;
  color: var(--gray-3);
  line-height: 1.5;
}

/* Plugin Cards */
.plugin-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}

.plugin-card {
  background: var(--white);
  border-radius: 10px;
  padding: 20px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal) var(--ease-expo-out);
  text-align: center;
}

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

.plugin-icon {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  background: var(--gray-1);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 12px;
  color: var(--primary);
  font-size: 20px;
}

.plugin-name {
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 4px;
}

.plugin-status {
  font-size: 11px;
  color: var(--gray-3);
}

/* Live Stream */
.live-features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.live-card {
  background: var(--white);
  border-radius: 16px;
  padding: 32px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal) var(--ease-expo-out);
}

.live-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.live-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--tertiary), #ff1a1a);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--white);
  font-size: 28px;
}

.live-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
}

.live-desc {
  font-size: 14px;
  color: var(--gray-4);
  line-height: 1.7;
}

/* Marketing Features */
.marketing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.marketing-card {
  background: var(--white);
  border-radius: 16px;
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal) var(--ease-expo-out);
}

.marketing-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.marketing-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

.marketing-icon {
  width: 56px;
  height: 56px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--secondary), #e6a600);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: 24px;
}

.marketing-title {
  font-size: 18px;
  font-weight: 600;
}

.marketing-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.marketing-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--gray-4);
}

.marketing-item i {
  color: var(--secondary);
  font-size: 12px;
}

/* Responsive Design */
@media (max-width: 991px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-5 { grid-template-columns: repeat(3, 1fr); }
  .pricing-grid { grid-template-columns: repeat(2, 1fr); }
  .help-categories { grid-template-columns: repeat(2, 1fr); }
  .tool-grid { grid-template-columns: repeat(2, 1fr); }
  .plugin-grid { grid-template-columns: repeat(3, 1fr); }
  
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .solution-card {
    grid-template-columns: 1fr;
  }
  
  .solution-card.reverse {
    direction: ltr;
  }
  
  .nav-menu {
    display: none;
  }
  
  .mobile-menu-btn {
    display: flex;
  }
}

@media (max-width: 767px) {
  .section {
    padding: 60px 0;
  }
  
  .section-title {
    font-size: 28px;
  }
  
  .hero-title {
    font-size: 32px;
  }
  
  .grid-2,
  .grid-3,
  .grid-4,
  .feature-cards,
  .partner-grid,
  .case-grid,
  .live-features,
  .marketing-grid {
    grid-template-columns: 1fr;
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .stats-item:not(:last-child)::after {
    display: none;
  }
  
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  
  .pricing-card.featured {
    transform: none;
  }
  
  .help-categories,
  .tool-grid {
    grid-template-columns: 1fr;
  }
  
  .plugin-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }
  
  .page-title {
    font-size: 32px;
  }
}

@media (max-width: 479px) {
  .hero-actions {
    flex-direction: column;
  }
  
  .hero-search {
    flex-direction: column;
  }
  
  .hero-search input,
  .hero-search button {
    border-radius: 8px;
    width: 100%;
  }
  
  .tabs {
    flex-direction: column;
    align-items: center;
  }
  
  .tab-btn {
    width: 100%;
    text-align: center;
  }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ========================================
   AI Assistant Widget
   ======================================== */
.ai-widget {
  position: fixed;
  bottom: 30px;
  right: 30px;
  z-index: 9999;
}

.ai-widget-button {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(36, 103, 236, 0.4);
  transition: all var(--transition-normal) var(--ease-spring);
  position: relative;
}

.ai-widget-button:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 30px rgba(36, 103, 236, 0.5);
}

.ai-widget-button i {
  font-size: 24px;
  color: var(--white);
}

.ai-widget-pulse {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: var(--primary);
  animation: aiPulse 2s infinite;
  z-index: -1;
}

@keyframes aiPulse {
  0% {
    transform: scale(1);
    opacity: 0.5;
  }
  100% {
    transform: scale(1.5);
    opacity: 0;
  }
}

.ai-widget-tooltip {
  position: absolute;
  bottom: 70px;
  right: 0;
  background: var(--white);
  padding: 12px 16px;
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
  font-size: 13px;
  color: var(--gray-4);
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-fast);
}

.ai-widget:hover .ai-widget-tooltip {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.ai-chat-window {
  position: absolute;
  bottom: 80px;
  right: 0;
  width: 360px;
  height: 480px;
  background: var(--white);
  border-radius: 20px;
  box-shadow: 0 10px 50px rgba(0, 0, 0, 0.2);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px) scale(0.95);
  transition: all var(--transition-normal) var(--ease-expo-out);
}

.ai-chat-window.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

.ai-chat-header {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.ai-chat-title {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--white);
}

.ai-chat-title i {
  font-size: 20px;
}

.ai-chat-title span {
  font-size: 15px;
  font-weight: 600;
}

.ai-chat-close {
  background: none;
  border: none;
  color: var(--white);
  font-size: 18px;
  cursor: pointer;
  opacity: 0.8;
  transition: opacity var(--transition-fast);
}

.ai-chat-close:hover {
  opacity: 1;
}

.ai-chat-body {
  flex: 1;
  padding: 20px;
  overflow-y: auto;
  background: var(--gray-1);
}

.ai-chat-message {
  display: flex;
  gap: 10px;
  margin-bottom: 16px;
}

.ai-chat-message.user {
  flex-direction: row-reverse;
}

.ai-chat-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: 14px;
  flex-shrink: 0;
}

.ai-chat-message.user .ai-chat-avatar {
  background: var(--gray-3);
}

.ai-chat-bubble {
  max-width: 240px;
  padding: 12px 16px;
  border-radius: 16px;
  font-size: 13px;
  line-height: 1.6;
}

.ai-chat-message.ai .ai-chat-bubble {
  background: var(--white);
  color: var(--gray-4);
  border-bottom-left-radius: 4px;
}

.ai-chat-message.user .ai-chat-bubble {
  background: var(--primary);
  color: var(--white);
  border-bottom-right-radius: 4px;
}

.ai-chat-footer {
  padding: 16px 20px;
  background: var(--white);
  border-top: 1px solid var(--gray-2);
}

.ai-chat-input-wrapper {
  display: flex;
  gap: 10px;
}

.ai-chat-input {
  flex: 1;
  padding: 12px 16px;
  border: 1px solid var(--gray-2);
  border-radius: 24px;
  font-size: 13px;
  outline: none;
  transition: border-color var(--transition-fast);
}

.ai-chat-input:focus {
  border-color: var(--primary);
}

.ai-chat-send {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--primary);
  border: none;
  color: var(--white);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.ai-chat-send:hover {
  background: var(--primary-dark);
  transform: scale(1.05);
}

.ai-chat-suggestions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.ai-chat-suggestion {
  padding: 6px 12px;
  background: var(--gray-1);
  border-radius: 16px;
  font-size: 12px;
  color: var(--gray-4);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.ai-chat-suggestion:hover {
  background: rgba(36, 103, 236, 0.1);
  color: var(--primary);
}

@media (max-width: 480px) {
  .ai-widget {
    bottom: 20px;
    right: 20px;
  }
  
  .ai-chat-window {
    width: calc(100vw - 40px);
    height: 400px;
    right: -10px;
  }
}