@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;600;800&family=Noto+Sans+SC:wght@300;400;700&display=swap');

:root {
  --primary-color: #007bff;
  --secondary-color: #0056b3;
  --accent-color: #4da3ff;
  --bg-color: #e6f2ff; /* Light blue background */
  --card-bg: rgba(255, 255, 255, 0.85); /* Glassmorphism */
  --text-dark: #1a202c;
  --text-light: #4a5568;
  --white: #ffffff;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Inter', 'Noto Sans SC', sans-serif;
  background-color: var(--bg-color);
  color: var(--text-dark);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  background-image: radial-gradient(circle at top left, #ffffff 0%, #e6f2ff 50%, #d4ebff 100%);
  min-height: 100vh;
}

/* Dynamic Bouncing Background Elements */
.bg-elements {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  z-index: -1;
  pointer-events: none;
}

.shape {
  position: absolute;
  filter: blur(40px);
  opacity: 0.6;
  border-radius: 50%;
  animation: bounceFloat 10s infinite ease-in-out alternate;
}

.shape-1 {
  width: 300px;
  height: 300px;
  background: #a3d1ff;
  top: 10%;
  left: 5%;
  animation-duration: 12s;
}

.shape-2 {
  width: 400px;
  height: 400px;
  background: #80bfff;
  top: 60%;
  right: 10%;
  animation-duration: 15s;
  animation-direction: alternate-reverse;
}

.shape-3 {
  width: 250px;
  height: 250px;
  background: #cce6ff;
  bottom: 5%;
  left: 20%;
  animation-duration: 18s;
}

@keyframes bounceFloat {
  0% {
    transform: translate(0, 0) scale(1);
  }
  50% {
    transform: translate(30px, -50px) scale(1.1);
  }
  100% {
    transform: translate(-20px, 30px) scale(0.9);
  }
}

/* Header & Hero Section */
header {
  text-align: center;
  padding: 80px 20px 40px;
  position: relative;
}

h1 {
  font-size: 3.5rem;
  font-weight: 800;
  color: var(--secondary-color);
  margin-bottom: 20px;
  letter-spacing: -1px;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-light);
  max-width: 800px;
  margin: 0 auto 40px;
}

.cta-button {
  display: inline-block;
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  color: var(--white);
  padding: 18px 40px;
  font-size: 1.2rem;
  font-weight: 600;
  border-radius: 50px;
  text-decoration: none;
  box-shadow: 0 10px 20px rgba(0, 123, 255, 0.3);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.cta-button:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 15px 25px rgba(0, 123, 255, 0.4);
  color: var(--white);
}

.cta-button::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  transition: 0.5s;
}

.cta-button:hover::after {
  left: 100%;
}

/* Features/Keywords Section */
.features {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 15px;
  margin: 40px auto;
  max-width: 900px;
  padding: 0 20px;
}

.feature-tag {
  background: var(--white);
  color: var(--primary-color);
  padding: 8px 16px;
  border-radius: 30px;
  font-size: 0.9rem;
  font-weight: 600;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
  border: 1px solid rgba(0, 123, 255, 0.1);
  transition: transform 0.3s;
}

.feature-tag:hover {
  transform: translateY(-2px);
  background: var(--primary-color);
  color: var(--white);
}

/* Pricing Section */
.pricing-section {
  padding: 60px 20px;
  max-width: 1200px;
  margin: 0 auto;
}

.section-title {
  text-align: center;
  font-size: 2.5rem;
  color: var(--secondary-color);
  margin-bottom: 40px;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
}

.pricing-card {
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  border-radius: 20px;
  padding: 40px;
  text-align: center;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.5);
  transition: transform 0.3s, box-shadow 0.3s;
  position: relative;
}

.pricing-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 20px 40px rgba(0, 123, 255, 0.15);
}

.pricing-card.popular {
  border: 2px solid var(--primary-color);
  transform: scale(1.05);
}

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

.popular-badge {
  position: absolute;
  top: -15px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary-color);
  color: var(--white);
  padding: 5px 15px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 1px;
}

.plan-name {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 15px;
}

.plan-price {
  font-size: 3rem;
  font-weight: 800;
  color: var(--primary-color);
  margin-bottom: 20px;
}

.plan-price span {
  font-size: 1rem;
  color: var(--text-light);
  font-weight: 400;
}

.plan-features {
  list-style: none;
  margin-bottom: 30px;
  text-align: left;
}

.plan-features li {
  margin-bottom: 12px;
  color: var(--text-light);
  display: flex;
  align-items: center;
}

.plan-features li::before {
  content: '\2713';
  color: var(--primary-color);
  font-weight: bold;
  margin-right: 10px;
}

.plan-btn {
  display: block;
  width: 100%;
  padding: 15px;
  background: var(--primary-color);
  color: var(--white);
  border: none;
  border-radius: 10px;
  font-size: 1.1rem;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.3s;
  cursor: pointer;
}

.plan-btn:hover {
  background: var(--secondary-color);
  color: var(--white);
}

/* User Reviews Section */
.reviews-section {
  padding: 60px 20px;
  background: rgba(255, 255, 255, 0.4);
}

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  max-width: 1200px;
  margin: 0 auto;
}

.review-card {
  background: var(--white);
  padding: 30px;
  border-radius: 15px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.review-stars {
  color: #fbbf24;
  margin-bottom: 10px;
  font-size: 1.2rem;
}

.review-text {
  font-style: italic;
  color: var(--text-light);
  margin-bottom: 15px;
}

.review-author {
  font-weight: 700;
  color: var(--secondary-color);
}

/* FAQ Section */
.faq-section {
  padding: 80px 20px;
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--white);
  margin-bottom: 15px;
  border-radius: 10px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.02);
  overflow: hidden;
}

.faq-question {
  padding: 20px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
  color: var(--text-dark);
}

.faq-question::after {
  content: '+';
  font-size: 1.5rem;
  color: var(--primary-color);
  transition: transform 0.3s;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out, padding 0.3s ease;
  background: #f8fbff;
  color: var(--text-light);
  padding: 0 20px;
}

.faq-item.active .faq-answer {
  max-height: 200px;
  padding: 0 20px 20px;
}

/* SEO Articles Section in Footer */
.seo-articles {
  padding: 40px 20px;
  background: var(--secondary-color);
  color: var(--white);
  text-align: center;
}

.seo-articles h3 {
  margin-bottom: 20px;
  font-size: 1.5rem;
}

.article-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 15px;
  max-width: 1000px;
  margin: 0 auto;
}

.article-links a {
  color: #cce6ff;
  text-decoration: none;
  font-size: 0.95rem;
  transition: color 0.3s;
}

.article-links a:hover {
  color: var(--white);
  text-decoration: underline;
}

/* Footer */
footer {
  text-align: center;
  padding: 20px;
  background: #004085;
  color: #a3d1ff;
  font-size: 0.9rem;
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-up {
  animation: fadeIn 0.8s ease-out forwards;
}

@media (max-width: 768px) {
  h1 {
    font-size: 2.5rem;
  }
  .pricing-card.popular {
    transform: scale(1);
  }
  .pricing-card.popular:hover {
    transform: scale(1) translateY(-5px);
  }
}

/* Knowledge Base Grid */
.kb-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}

.kb-card {
  display: flex;
  align-items: center;
  padding: 25px 20px;
  background: var(--card-bg);
  border-radius: 10px;
  text-decoration: none;
  color: var(--text-dark);
  font-weight: 600;
  font-size: 1rem;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
  transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
  border: 1px solid rgba(0, 123, 255, 0.1);
  line-height: 1.5;
}

.kb-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 25px rgba(0, 123, 255, 0.15);
  border-color: var(--primary-color);
  color: var(--primary-color);
}

.kb-card.highlight {
  color: #00bfff; /* Cyan/blue highlight to match image */
  border-color: #00bfff;
}