:root {
  --primary-color: #ffcc00;
  --primary-hover: #e6b800;
  --primary-light: #fffbea;
  --dark-color: #111827;
  --text-main: #1f2937;
  --text-muted: #4b5563;
  --bg-light: #f9fafb;
  --bg-white: #ffffff;
  --border-color: #e5e7eb;
  --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 10px 25px rgba(0,0,0,0.12);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --transition: all 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--text-main);
  background-color: var(--bg-light);
  line-height: 1.6;
}

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

ul {
  list-style: none;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header & Nav */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

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

.ai-page-logo {
  height: 40px;
  width: auto;
  display: block;
}

.brand-title {
  font-size: 20px;
  font-weight: 800;
  color: var(--dark-color);
  letter-spacing: -0.5px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0;
}

.nav-links li a {
  padding: 8px 14px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
  border-radius: var(--radius-sm);
}

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

.header-cta {
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 22px;
  font-size: 15px;
  font-weight: 700;
  border-radius: 50px;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--primary-color);
  color: var(--dark-color);
  box-shadow: 0 4px 14px rgba(255, 204, 0, 0.4);
}

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

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

.btn-outline:hover {
  background-color: var(--dark-color);
  color: #ffffff;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 24px;
  cursor: pointer;
  color: var(--dark-color);
}

/* Hero Section - STRICTLY NO IMAGES */
.hero-section {
  background: linear-gradient(135deg, #ffffff 0%, #fffbe6 50%, #fff0b3 100%);
  padding: 80px 0 60px;
  border-bottom: 1px solid rgba(255, 204, 0, 0.3);
  position: relative;
  overflow: hidden;
}

.hero-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background-color: #ffffff;
  border: 1px solid var(--primary-color);
  border-radius: 50px;
  font-size: 14px;
  font-weight: 700;
  color: var(--dark-color);
  margin-bottom: 20px;
  box-shadow: var(--shadow-sm);
}

.hero-title {
  font-size: 38px;
  line-height: 1.25;
  font-weight: 900;
  color: var(--dark-color);
  margin-bottom: 20px;
}

.hero-title span {
  background: linear-gradient(120deg, #d99b00, #b37b00);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: 17px;
  color: var(--text-muted);
  margin-bottom: 30px;
  line-height: 1.7;
}

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

.hero-card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.hero-card {
  background: #ffffff;
  padding: 24px;
  border-radius: var(--radius-md);
  border: 2px solid var(--primary-color);
  box-shadow: var(--shadow-md);
  transition: var(--transition);
}

.hero-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.hero-card-num {
  font-size: 32px;
  font-weight: 900;
  color: var(--dark-color);
  line-height: 1;
  margin-bottom: 8px;
}

.hero-card-label {
  font-size: 14px;
  color: var(--text-muted);
  font-weight: 600;
}

/* Section Commons */
.section {
  padding: 80px 0;
}

.section-white {
  background-color: var(--bg-white);
}

.section-header {
  text-align: center;
  max-width: 750px;
  margin: 0 auto 50px;
}

.section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: #b37b00;
  background-color: var(--primary-light);
  padding: 4px 12px;
  border-radius: 4px;
  margin-bottom: 12px;
}

.section-title {
  font-size: 32px;
  font-weight: 800;
  color: var(--dark-color);
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 16px;
  color: var(--text-muted);
}

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

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

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
}

.feature-card {
  background: var(--bg-white);
  padding: 30px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  position: relative;
  top: 0;
}

.feature-card:hover {
  top: -6px;
  border-color: var(--primary-color);
  box-shadow: var(--shadow-md);
}

.feature-icon {
  width: 52px;
  height: 52px;
  background-color: var(--primary-color);
  color: var(--dark-color);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  font-weight: bold;
  margin-bottom: 20px;
}

.feature-title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--dark-color);
}

.feature-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Platform Intro & Showcase */
.platform-intro-box {
  background: linear-gradient(135deg, #111827 0%, #1f2937 100%);
  color: #ffffff;
  padding: 40px;
  border-radius: var(--radius-lg);
  margin-bottom: 50px;
}

.platform-intro-box h3 {
  font-size: 26px;
  color: var(--primary-color);
  margin-bottom: 16px;
}

.platform-intro-box p {
  color: #d1d5db;
  font-size: 16px;
  line-height: 1.8;
  margin-bottom: 20px;
}

.model-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.model-tag {
  background: rgba(255, 204, 0, 0.15);
  color: var(--primary-color);
  border: 1px solid rgba(255, 204, 0, 0.3);
  padding: 6px 14px;
  border-radius: 50px;
  font-size: 13px;
  font-weight: 600;
}

/* Visual Media Container */
.media-container {
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  background: #ffffff;
  padding: 12px;
  border: 1px solid var(--border-color);
}

.media-container img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-sm);
  object-fit: cover;
}

/* Workflow Step */
.step-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  position: relative;
}

.step-card {
  background: var(--bg-white);
  padding: 24px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  position: relative;
}

.step-num {
  font-size: 36px;
  font-weight: 900;
  color: var(--primary-color);
  line-height: 1;
  margin-bottom: 12px;
}

.step-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}

/* Comparison Table */
.rating-banner {
  background-color: var(--primary-color);
  color: var(--dark-color);
  padding: 24px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 30px;
}

.rating-score {
  font-size: 42px;
  font-weight: 900;
  line-height: 1;
}

.rating-stars {
  font-size: 24px;
  color: #000000;
}

.table-wrapper {
  overflow-x: auto;
  background: #ffffff;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.compare-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.compare-table th,
.compare-table td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
}

.compare-table th {
  background-color: #f9fafb;
  font-weight: 700;
  color: var(--dark-color);
}

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

.highlight-row {
  background-color: var(--primary-light);
  font-weight: 700;
}

/* Token Pricing Component */
.pricing-card {
  background: var(--bg-white);
  border-radius: var(--radius-md);
  padding: 30px;
  border: 2px solid var(--border-color);
  transition: var(--transition);
}

.pricing-card.featured {
  border-color: var(--primary-color);
  box-shadow: var(--shadow-lg);
  transform: scale(1.02);
}

.pricing-header {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 20px;
  margin-bottom: 20px;
}

.pricing-title {
  font-size: 22px;
  font-weight: 800;
}

.pricing-price {
  font-size: 36px;
  font-weight: 900;
  color: var(--dark-color);
  margin: 10px 0;
}

/* FAQ Accordion */
.faq-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.faq-item {
  background: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  cursor: pointer;
  transition: var(--transition);
}

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

.faq-question {
  font-size: 16px;
  font-weight: 700;
  color: var(--dark-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-answer {
  margin-top: 12px;
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* User Reviews */
.review-card {
  background: var(--bg-white);
  padding: 24px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.review-author {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 16px;
}

.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-color: var(--primary-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: var(--dark-color);
}

.author-info h4 {
  font-size: 15px;
  font-weight: 700;
}

.author-info p {
  font-size: 13px;
  color: var(--text-muted);
}

/* Articles & Links */
.article-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.article-item {
  background: var(--bg-white);
  padding: 16px 20px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.article-item a {
  font-weight: 600;
  color: var(--dark-color);
}

.article-item a:hover {
  color: #b37b00;
}

/* Form Styles */
.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.contact-form {
  background: var(--bg-white);
  padding: 36px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
}

.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 8px;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 15px;
  background-color: #f9fafb;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--dark-color);
  background-color: #ffffff;
}

.qr-box {
  background: var(--bg-white);
  padding: 24px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  text-align: center;
}

.qr-box img {
  max-width: 180px;
  height: auto;
  margin-bottom: 12px;
}

/* Footer */
.footer {
  background-color: var(--dark-color);
  color: #9ca3af;
  padding: 60px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand h3 {
  color: #ffffff;
  font-size: 20px;
  margin-bottom: 16px;
}

.footer-links h4 {
  color: #ffffff;
  font-size: 16px;
  margin-bottom: 16px;
}

.footer-links ul li {
  margin-bottom: 10px;
}

.footer-links ul li a:hover {
  color: var(--primary-color);
}

.friend-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 10px;
}

.friend-links a {
  color: #9ca3af;
  font-size: 14px;
}

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

.footer-bottom {
  border-top: 1px solid #374151;
  padding-top: 24px;
  text-align: center;
  font-size: 14px;
}

/* Floating Contact Widget */
.floating-widget {
  position: fixed;
  bottom: 30px;
  right: 30px;
  z-index: 999;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.float-btn {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background-color: var(--primary-color);
  color: var(--dark-color);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  font-size: 20px;
  font-weight: bold;
  cursor: pointer;
  border: none;
}

.float-btn:hover {
  transform: scale(1.1);
}

/* Responsive */
@media (max-width: 992px) {
  .hero-wrapper,
  .contact-wrapper,
  .footer-grid,
  .grid-3,
  .grid-4,
  .grid-2 {
    grid-template-columns: 1fr;
  }
  .step-grid, .faq-grid {
    grid-template-columns: 1fr;
  }
  .pricing-card.featured {
    transform: none;
  }
  .nav-links {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background-color: #ffffff;
    flex-direction: column;
    padding: 20px;
    box-shadow: var(--shadow-md);
  }
  .nav-links.show {
    display: flex;
  }
  .nav-toggle {
    display: block;
  }
  .hero-title {
    font-size: 28px;
  }
}