:root {
  --primary-cyan: #0fa49c;
  --primary-dark: #096b66;
  --primary-light: #e6f7f6;
  --accent-cyan: #14b8a6;
  --accent-gradient: linear-gradient(135deg, #0fa49c 0%, #0284c7 100%);
  --bg-main: #f8fafc;
  --bg-card: #ffffff;
  --text-main: #1e293b;
  --text-muted: #64748b;
  --border-color: #e2e8f0;
  --border-focus: #0fa49c;
  --shadow-sm: 0 2px 4px rgba(0,0,0,0.03);
  --shadow-md: 0 6px 16px rgba(15, 164, 156, 0.08);
  --shadow-lg: 0 12px 28px rgba(15, 164, 156, 0.12);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
}

* {
  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-main);
  line-height: 1.6;
}

body {
  width: 100%;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.25s ease;
}

.ai-container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header & Nav */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
}

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

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

.brand-box img {
  height: 38px;
  width: auto;
  display: block;
}

.brand-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary-dark);
  letter-spacing: -0.5px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0;
  list-style: none;
}

.nav-links li a {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-main);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  display: block;
}

.nav-links li a:hover {
  color: var(--primary-cyan);
  background: var(--primary-light);
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.25s ease;
}

.btn-primary {
  background: var(--accent-gradient);
  color: #ffffff !important;
  box-shadow: 0 4px 12px rgba(15, 164, 156, 0.25);
}

.btn-primary:hover {
  opacity: 0.95;
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(15, 164, 156, 0.35);
}

.btn-outline {
  border-color: var(--primary-cyan);
  color: var(--primary-cyan) !important;
  background: transparent;
}

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

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-main);
  margin: 5px 0;
  transition: 0.3s;
}

/* Hero Section (No Images as required) */
.hero-section {
  padding: 80px 0 60px;
  background: linear-gradient(180deg, #e6f7f6 0%, #f8fafc 100%);
  position: relative;
  overflow: hidden;
}

.hero-glow-1 {
  position: absolute;
  top: -100px;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 300px;
  background: radial-gradient(circle, rgba(20, 184, 166, 0.2) 0%, rgba(255,255,255,0) 70%);
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 860px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: #ffffff;
  border: 1px solid rgba(15, 164, 156, 0.3);
  border-radius: 20px;
  font-size: 13px;
  color: var(--primary-dark);
  font-weight: 600;
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
}

.hero-title {
  font-size: 42px;
  line-height: 1.25;
  font-weight: 800;
  color: #0f172a;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}

.hero-subtitle {
  font-size: 18px;
  color: var(--text-muted);
  margin-bottom: 36px;
  line-height: 1.6;
}

.hero-btn-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.hero-btn-group .btn-lg {
  padding: 14px 32px;
  font-size: 16px;
}

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

.stat-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  padding: 20px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  text-align: center;
}

.stat-num {
  font-size: 28px;
  font-weight: 800;
  color: var(--primary-cyan);
  margin-bottom: 4px;
  display: block;
}

.stat-label {
  font-size: 13px;
  color: var(--text-muted);
}

/* Sections Global */
.section {
  padding: 80px 0;
  position: relative;
}

.section-alt {
  background: #ffffff;
}

.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 50px;
}

.section-tag {
  color: var(--primary-cyan);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 8px;
  display: block;
}

.section-title {
  font-size: 32px;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 12px;
}

.section-desc {
  font-size: 15px;
  color: var(--text-muted);
}

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

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(15, 164, 156, 0.4);
}

.feature-icon-box {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: var(--primary-light);
  color: var(--primary-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 20px;
  margin-bottom: 18px;
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
  color: #0f172a;
}

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

/* Model Ecosystem Cloud */
.models-wrapper {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-sm);
}

.model-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.model-chip {
  background: var(--bg-main);
  border: 1px solid var(--border-color);
  padding: 8px 18px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-main);
  transition: all 0.2s;
}

.model-chip:hover {
  background: var(--primary-cyan);
  color: #ffffff;
  border-color: var(--primary-cyan);
  transform: scale(1.05);
}

/* Split Workflow / Media Showcase */
.showcase-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  margin-bottom: 60px;
}

.showcase-row.reverse {
  direction: rtl;
}

.showcase-row.reverse .showcase-text {
  direction: ltr;
}

.showcase-img-box {
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  background: #fff;
  border: 1px solid var(--border-color);
}

.showcase-img-box img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.3s ease;
}

.showcase-img-box:hover img {
  transform: scale(1.02);
}

.showcase-text h3 {
  font-size: 26px;
  font-weight: 700;
  margin-bottom: 16px;
  color: #0f172a;
}

.showcase-text p {
  font-size: 15px;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.showcase-list {
  list-style: none;
  margin-bottom: 24px;
}

.showcase-list li {
  font-size: 14px;
  color: var(--text-main);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.showcase-list li::before {
  content: "✓";
  color: var(--primary-cyan);
  font-weight: 800;
}

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

.process-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  position: relative;
  text-align: center;
}

.process-step {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent-gradient);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  padding: 2px 10px;
  border-radius: 10px;
}

.process-card h4 {
  font-size: 16px;
  font-weight: 700;
  margin: 12px 0 8px;
}

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

/* Evaluation & Comparison Table */
.eval-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-md);
  margin-bottom: 30px;
}

.eval-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 24px;
  margin-bottom: 24px;
}

.eval-score-box {
  display: flex;
  align-items: center;
  gap: 16px;
}

.score-badge {
  background: var(--accent-gradient);
  color: #fff;
  font-size: 32px;
  font-weight: 800;
  padding: 8px 18px;
  border-radius: var(--radius-md);
}

.eval-table-container {
  overflow-x: auto;
}

.eval-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 14px;
}

.eval-table th, .eval-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border-color);
}

.eval-table th {
  background: var(--primary-light);
  color: var(--primary-dark);
  font-weight: 700;
}

.eval-table td:first-child {
  font-weight: 600;
  color: var(--text-main);
}

.highlight-td {
  background: rgba(15, 164, 156, 0.05);
  font-weight: 600;
  color: var(--primary-dark);
}

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

.testimonial-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.testimonial-content {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 16px;
  font-style: italic;
}

.testimonial-user {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px solid var(--border-color);
  padding-top: 12px;
}

.user-avatar-init {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
}

.user-meta h5 {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-main);
}

.user-meta span {
  font-size: 12px;
  color: var(--text-muted);
}

/* FAQ Accordion */
.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.faq-item {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  text-align: left;
  padding: 16px 20px;
  background: none;
  border: none;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-question::after {
  content: "+";
  font-size: 18px;
  color: var(--primary-cyan);
  transition: transform 0.2s;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  background: #fafafa;
}

.faq-answer-inner {
  padding: 0 20px 16px;
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Articles & Dynamic Links */
.article-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.article-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  transition: all 0.2s;
}

.article-card:hover {
  border-color: var(--primary-cyan);
  box-shadow: var(--shadow-sm);
}

.article-card h4 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-main);
}

.article-card p {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.article-link {
  font-size: 13px;
  font-weight: 600;
  color: var(--primary-cyan);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.article-link:hover {
  text-decoration: underline;
}

/* Contact & Form */
.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-md);
}

.contact-info-list {
  list-style: none;
  margin-top: 24px;
}

.contact-info-list li {
  margin-bottom: 18px;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 14px;
}

.qr-box {
  margin-top: 24px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.qr-img {
  width: 100px;
  height: 100px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 4px;
  background: #fff;
}

.qr-img img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.form-group {
  margin-bottom: 16px;
}

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text-main);
}

.form-control {
  width: 100%;
  padding: 10px 14px;
  font-size: 14px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: #fdfdfd;
  color: var(--text-main);
  outline: none;
  transition: border-color 0.2s;
}

.form-control:focus {
  border-color: var(--border-focus);
  background: #ffffff;
}

textarea.form-control {
  resize: vertical;
  min-height: 90px;
}

/* Footer Safe Styling */
.site-footer {
  background: #0f172a;
  color: #94a3b8;
  padding: 60px 0 30px;
  border-top: 1px solid #1e293b;
}

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

.footer-brand h4 {
  color: #f8fafc;
  font-size: 18px;
  margin-bottom: 12px;
}

.footer-brand p {
  font-size: 13px;
  line-height: 1.6;
}

.footer-col h5 {
  color: #f8fafc;
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 16px;
}

.footer-links {
  list-style: none;
}

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

.footer-links a {
  color: #94a3b8;
  font-size: 13px;
}

.footer-links a:hover {
  color: #ffffff;
}

.friend-links-box {
  border-top: 1px solid #1e293b;
  padding-top: 24px;
  margin-bottom: 24px;
}

.friend-links-box h6 {
  color: #f8fafc;
  font-size: 13px;
  margin-bottom: 12px;
}

.friend-links-list {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.friend-links-list a {
  color: #94a3b8;
  font-size: 12px;
}

.friend-links-list a:hover {
  color: #14b8a6;
}

.footer-bottom {
  border-top: 1px solid #1e293b;
  padding-top: 24px;
  text-align: center;
  font-size: 12px;
  color: #64748b;
}

/* Float Widget */
.float-contact {
  position: fixed;
  bottom: 30px;
  right: 24px;
  z-index: 999;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.float-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--accent-gradient);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  cursor: pointer;
  border: none;
  font-size: 18px;
}

/* Responsive */
@media (max-width: 992px) {
  .feature-grid, .article-grid, .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .hero-stats-grid, .process-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .showcase-row, .contact-wrapper, .faq-grid {
    grid-template-columns: 1fr;
  }
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: #ffffff;
    flex-direction: column;
    padding: 16px 24px;
    box-shadow: var(--shadow-md);
    border-bottom: 1px solid var(--border-color);
  }
  .nav-links.active {
    display: flex;
  }
  .nav-toggle {
    display: block;
  }
  .hero-title {
    font-size: 28px;
  }
  .feature-grid, .article-grid, .testimonials-grid, .hero-stats-grid, .process-grid {
    grid-template-columns: 1fr;
  }
  .footer-top {
    grid-template-columns: 1fr;
  }
}