:root {
  --primary: #4361ee;
  --primary-light: #4cc9f0;
  --accent-pink: #f72585;
  --accent-purple: #7209b7;
  --accent-orange: #f8961e;
  --accent-green: #4ade80;
  --rainbow-gradient: linear-gradient(135deg, #f72585 0%, #7209b7 25%, #4361ee 50%, #4cc9f0 75%, #4ade80 100%);
  --rainbow-subtle: linear-gradient(135deg, rgba(247,37,133,0.06) 0%, rgba(114,9,183,0.06) 25%, rgba(67,97,238,0.06) 50%, rgba(76,201,240,0.06) 75%, rgba(74,222,128,0.06) 100%);
  --bg-page: #f8fafc;
  --bg-card: #ffffff;
  --text-main: #1e293b;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  --border-color: #e2e8f0;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 10px 25px -5px rgba(67, 97, 238, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 20px 30px -10px rgba(114, 9, 183, 0.12);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background-color: var(--bg-page);
  color: var(--text-main);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

.site-container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header & Nav */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

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

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

.brand-logo-wrap {
  height: 38px;
  display: flex;
  align-items: center;
}

.ai-page-logo {
  max-height: 38px;
  width: auto;
  object-fit: contain;
}

.brand-title {
  font-size: 1.25rem;
  font-weight: 800;
  background: var(--rainbow-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.5px;
}

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

.nav-links li a {
  padding: 8px 14px;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-main);
  border-radius: var(--radius-sm);
}

.nav-links li a:hover,
.nav-links li a.active {
  color: var(--primary);
  background: rgba(67, 97, 238, 0.08);
}

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

.btn-rainbow-main {
  background: var(--rainbow-gradient);
  color: #ffffff !important;
  font-weight: 600;
  padding: 10px 22px;
  border-radius: 30px;
  box-shadow: 0 4px 15px rgba(247, 37, 133, 0.3);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: none;
  cursor: pointer;
  font-size: 0.95rem;
}

.btn-rainbow-main:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(67, 97, 238, 0.4);
}

.btn-outline {
  border: 1.5px solid var(--primary);
  color: var(--primary);
  font-weight: 600;
  padding: 8px 18px;
  border-radius: 30px;
  background: transparent;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
}

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

.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-main);
  cursor: pointer;
}

/* Sections Common */
section {
  padding: 70px 0;
  position: relative;
}

.section-head {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 48px;
}

.section-tag {
  display: inline-block;
  padding: 5px 16px;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--primary);
  background: rgba(67, 97, 238, 0.1);
  border-radius: 20px;
  margin-bottom: 12px;
  letter-spacing: 1px;
}

.section-title {
  font-size: 2.1rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 14px;
  line-height: 1.3;
}

.section-desc {
  font-size: 1rem;
  color: var(--text-muted);
}

/* Hero Section (No Images Allowed) */
.hero-section {
  padding: 80px 0 70px;
  background: radial-gradient(circle at 80% 20%, rgba(247, 37, 133, 0.08) 0%, transparent 40%),
              radial-gradient(circle at 10% 60%, rgba(76, 201, 240, 0.1) 0%, transparent 45%),
              var(--rainbow-subtle);
  border-bottom: 1px solid var(--border-color);
  overflow: hidden;
  position: relative;
}

.hero-content {
  text-align: center;
  max-width: 920px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #ffffff;
  padding: 6px 18px;
  border-radius: 30px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--accent-purple);
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(114, 9, 183, 0.15);
  margin-bottom: 24px;
}

.hero-title {
  font-size: 2.6rem;
  font-weight: 900;
  line-height: 1.25;
  color: var(--text-main);
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}

.hero-highlight {
  background: var(--rainbow-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 780px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

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

.btn-hero-major {
  font-size: 1.1rem;
  padding: 14px 34px;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  background: #ffffff;
  padding: 24px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-color);
}

.metric-item {
  text-align: center;
  padding: 10px;
}

.metric-num {
  font-size: 1.9rem;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 4px;
  font-feature-settings: "tnum";
}

.metric-label {
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* Models Grid Cloud */
.models-ticker-wrap {
  padding: 30px 0;
  background: #ffffff;
  border-bottom: 1px solid var(--border-color);
}

.models-title {
  text-align: center;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-muted);
  margin-bottom: 18px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.models-cloud {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
}

.model-tag {
  background: var(--bg-page);
  border: 1px solid var(--border-color);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-main);
  transition: var(--transition);
}

.model-tag:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(67, 97, 238, 0.05);
  transform: translateY(-2px);
}

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

.service-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 28px;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  position: relative;
  display: flex;
  flex-direction: column;
}

.service-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: rgba(67, 97, 238, 0.3);
}

.card-icon-box {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
  color: #ffffff;
}

.icon-c1 { background: linear-gradient(135deg, #f72585, #b5179e); }
.icon-c2 { background: linear-gradient(135deg, #7209b7, #560bad); }
.icon-c3 { background: linear-gradient(135deg, #4361ee, #3a0ca3); }
.icon-c4 { background: linear-gradient(135deg, #4cc9f0, #4895ef); }
.icon-c5 { background: linear-gradient(135deg, #f8961e, #f3722c); }
.icon-c6 { background: linear-gradient(135deg, #4ade80, #10b981); }

.card-title {
  font-size: 1.22rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-main);
}

.card-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 18px;
  flex-grow: 1;
}

.card-features-list {
  list-style: none;
  font-size: 0.85rem;
  color: var(--text-main);
  border-top: 1px dashed var(--border-color);
  padding-top: 14px;
}

.card-features-list li {
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.card-features-list li::before {
  content: "•";
  color: var(--primary);
  font-weight: bold;
}

/* Media Showcase Section */
.media-showcase-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  align-items: center;
}

.media-item {
  background: #ffffff;
  border-radius: var(--radius-md);
  padding: 16px;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.media-img-wrap {
  width: 100%;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: #f1f5f9;
}

.ai-page-image {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  transition: var(--transition);
}

.media-item:hover .ai-page-image {
  transform: scale(1.02);
}

.media-caption {
  margin-top: 12px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-main);
  text-align: center;
}

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

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

.step-num {
  width: 40px;
  height: 40px;
  line-height: 40px;
  border-radius: 50%;
  background: var(--rainbow-gradient);
  color: #ffffff;
  font-weight: 800;
  font-size: 1.1rem;
  margin: 0 auto 16px;
}

.step-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.step-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* Evaluation & Comparison Table */
.rating-highlight-box {
  background: var(--rainbow-subtle);
  border: 2px solid rgba(67, 97, 238, 0.2);
  border-radius: var(--radius-lg);
  padding: 30px;
  margin-bottom: 36px;
  display: flex;
  align-items: center;
  justify-content: space-around;
  flex-wrap: wrap;
  gap: 20px;
}

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

.rating-huge-score {
  font-size: 3.2rem;
  font-weight: 900;
  color: var(--accent-pink);
  line-height: 1;
}

.rating-stars {
  color: #f59e0b;
  font-size: 1.3rem;
  margin-bottom: 4px;
}

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

.eval-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.92rem;
}

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

.eval-table th {
  background: #f8fafc;
  font-weight: 700;
  color: var(--text-main);
}

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

.highlight-row {
  background: rgba(67, 97, 238, 0.03);
  font-weight: 600;
}

.tag-badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 12px;
  font-size: 0.78rem;
  font-weight: 700;
}

.badge-green { background: #dcfce7; color: #15803d; }
.badge-blue { background: #dbeafe; color: #1d4ed8; }
.badge-gray { background: #f1f5f9; color: #64748b; }

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

.review-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;
}

.review-text {
  font-size: 0.92rem;
  color: var(--text-main);
  line-height: 1.65;
  margin-bottom: 18px;
  font-style: italic;
}

.reviewer-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px solid var(--border-color);
  padding-top: 14px;
}

.reviewer-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--rainbow-gradient);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1rem;
}

.reviewer-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
}

.reviewer-role {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* FAQ Accordion */
.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

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

.faq-question {
  padding: 18px 24px;
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--text-main);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}

.faq-toggle-icon {
  font-size: 1.2rem;
  transition: var(--transition);
  color: var(--primary);
}

.faq-answer {
  padding: 0 24px 20px;
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.65;
  display: none;
}

.faq-item.active {
  border-color: var(--primary);
  box-shadow: var(--shadow-sm);
}

.faq-item.active .faq-toggle-icon {
  transform: rotate(45deg);
}

.faq-item.active .faq-answer {
  display: block;
}

/* Matching Form & Contact */
.form-contact-wrap {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 36px;
  align-items: flex-start;
}

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

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

.form-label {
  display: block;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
}

.form-control {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  color: var(--text-main);
  background: var(--bg-page);
  outline: none;
  transition: var(--transition);
}

.form-control:focus {
  border-color: var(--primary);
  background: #ffffff;
  box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.15);
}

textarea.form-control {
  resize: vertical;
  min-height: 110px;
}

.contact-info-card {
  background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
  color: #ffffff;
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-md);
}

.contact-info-title {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 20px;
  color: #ffffff;
}

.contact-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
  font-size: 0.92rem;
  margin-bottom: 24px;
}

.contact-list li {
  display: flex;
  align-items: center;
  gap: 10px;
}

.qr-code-box {
  background: #ffffff;
  padding: 14px;
  border-radius: var(--radius-md);
  text-align: center;
  display: inline-block;
}

.qr-code-box img {
  max-width: 140px;
  height: auto;
  border-radius: 4px;
  display: block;
}

.qr-label {
  font-size: 0.8rem;
  color: var(--text-main);
  margin-top: 8px;
  font-weight: 600;
}

/* Articles Area */
.articles-section {
  background: #ffffff;
  border-top: 1px solid var(--border-color);
}

.articles-list-box {
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-width: 860px;
  margin: 0 auto;
}

.article-item {
  padding: 18px 24px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: var(--bg-page);
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: var(--transition);
}

.article-item:hover {
  background: #ffffff;
  border-color: var(--primary);
  transform: translateX(4px);
}

.article-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-main);
}

.article-arrow {
  color: var(--primary);
  font-weight: bold;
}

/* Footer & Friend Links */
.site-footer {
  background: #0f172a;
  color: #94a3b8;
  padding: 60px 0 30px;
  font-size: 0.9rem;
  border-top: 1px solid #334155;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 36px;
  margin-bottom: 40px;
}

.footer-col h4 {
  color: #ffffff;
  font-size: 1.05rem;
  margin-bottom: 18px;
  font-weight: 700;
}

.footer-links-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links-list a {
  color: #94a3b8;
}

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

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

.friend-links-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
  font-size: 0.85rem;
}

.friend-links-wrap a {
  color: #cbd5e1;
  background: rgba(255, 255, 255, 0.05);
  padding: 4px 10px;
  border-radius: 4px;
}

.friend-links-wrap a:hover {
  color: #4cc9f0;
  background: rgba(255, 255, 255, 0.1);
}

.footer-bottom {
  text-align: center;
  border-top: 1px solid #1e293b;
  padding-top: 24px;
  font-size: 0.82rem;
  color: #64748b;
}

/* Floating Tools */
.floating-kefu-btn {
  position: fixed;
  right: 24px;
  bottom: 30px;
  z-index: 99;
  background: var(--rainbow-gradient);
  color: #ffffff;
  padding: 12px 20px;
  border-radius: 30px;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 0.92rem;
  cursor: pointer;
  transition: var(--transition);
}

.floating-kefu-btn:hover {
  transform: scale(1.05);
}

/* Responsive Media Queries */
@media (max-width: 992px) {
  .cards-grid-3,
  .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .process-grid,
  .hero-metrics {
    grid-template-columns: repeat(2, 1fr);
  }
  .form-contact-wrap {
    grid-template-columns: 1fr;
  }
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
  .media-showcase-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: #ffffff;
    flex-direction: column;
    padding: 16px 20px;
    box-shadow: var(--shadow-md);
    border-bottom: 1px solid var(--border-color);
  }
  .nav-links.show {
    display: flex;
  }
  .nav-links li {
    width: 100%;
  }
  .nav-links li a {
    display: block;
    padding: 10px 0;
  }
  .menu-toggle {
    display: block;
  }
  .cards-grid-3,
  .reviews-grid,
  .process-grid,
  .hero-metrics {
    grid-template-columns: 1fr;
  }
  .footer-top {
    grid-template-columns: 1fr;
  }
  .hero-title {
    font-size: 1.9rem;
  }
  .section-title {
    font-size: 1.6rem;
  }
}