:root {
  --laser-bg: #f8fafc;
  --text-main: #0f172a;
  --text-muted: #475569;
  --laser-cyan: #06b6d4;
  --laser-purple: #8b5cf6;
  --laser-pink: #ec4899;
  --laser-grad: linear-gradient(135deg, #06b6d4 0%, #8b5cf6 50%, #ec4899 100%);
  --laser-grad-soft: linear-gradient(135deg, rgba(6,182,212,0.1) 0%, rgba(139,92,246,0.1) 50%, rgba(236,72,153,0.1) 100%);
  --laser-border: linear-gradient(135deg, rgba(6,182,212,0.4), rgba(139,92,246,0.4), rgba(236,72,153,0.4));
  --card-bg: rgba(255, 255, 255, 0.85);
  --card-shadow: 0 10px 25px -5px rgba(139, 92, 246, 0.08), 0 8px 10px -6px rgba(6, 182, 212, 0.05);
  --border-color: #e2e8f0;
  --radius-lg: 16px;
  --radius-md: 10px;
}

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

html {
  scroll-behavior: smooth;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background-color: var(--laser-bg);
  color: var(--text-main);
  line-height: 1.6;
}

body {
  background: radial-gradient(circle at 10% 20%, rgba(6,182,212,0.06) 0%, transparent 40%),
              radial-gradient(circle at 90% 80%, rgba(236,72,153,0.06) 0%, transparent 40%),
              radial-gradient(circle at 50% 50%, rgba(139,92,246,0.04) 0%, transparent 60%),
              #f8fafc;
  min-height: 100vh;
  overflow-x: hidden;
}

.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header & Nav */
.header-wrapper {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
}

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

.brand-box {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.logo-wrap {
  height: 40px;
  display: flex;
  align-items: center;
}

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

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

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

.nav-item a {
  display: block;
  padding: 8px 12px;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-item a:hover {
  color: var(--laser-purple);
}

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

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 22px;
  background: var(--laser-grad);
  color: #ffffff;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  border-radius: 9999px;
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(139, 92, 246, 0.3);
  transition: transform 0.2s, box-shadow 0.2s;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(139, 92, 246, 0.45);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 22px;
  background: #ffffff;
  color: var(--text-main);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  border-radius: 9999px;
  border: 1px solid var(--border-color);
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s;
}

.btn-secondary:hover {
  background: #f1f5f9;
  border-color: #cbd5e1;
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.mobile-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-main);
  margin: 5px 0;
  transition: 0.3s;
}

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

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 56px;
}

.section-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  background: var(--laser-grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 8px;
}

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

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

/* Hero Section (No Images Allowed) */
.hero-section {
  padding: 90px 0 70px;
  text-align: center;
  position: relative;
}

.laser-glow {
  position: absolute;
  top: 10%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 280px;
  background: linear-gradient(135deg, rgba(6,182,212,0.18), rgba(139,92,246,0.18), rgba(236,72,153,0.18));
  filter: blur(80px);
  border-radius: 50%;
  z-index: -1;
  pointer-events: none;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: #ffffff;
  border: 1px solid rgba(139, 92, 246, 0.3);
  border-radius: 9999px;
  font-size: 13px;
  font-weight: 600;
  color: var(--laser-purple);
  margin-bottom: 24px;
  box-shadow: 0 2px 8px rgba(139, 92, 246, 0.1);
}

.hero-title {
  font-size: 46px;
  font-weight: 900;
  line-height: 1.25;
  color: var(--text-main);
  max-width: 880px;
  margin: 0 auto 20px;
  letter-spacing: -1px;
}

.hero-subtitle {
  font-size: 18px;
  color: var(--text-muted);
  max-width: 720px;
  margin: 0 auto 36px;
  line-height: 1.6;
}

.hero-cta {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 48px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 960px;
  margin: 0 auto;
}

.stat-card {
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(8px);
  padding: 24px;
  border-radius: var(--radius-lg);
  box-shadow: var(--card-shadow);
  text-align: center;
  transition: transform 0.2s;
}

.stat-card:hover {
  transform: translateY(-4px);
}

.stat-value {
  font-size: 32px;
  font-weight: 800;
  color: var(--laser-purple);
  margin-bottom: 4px;
}

.stat-label {
  font-size: 14px;
  color: var(--text-muted);
}

/* Platform Intro */
.intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.intro-content h3 {
  font-size: 26px;
  font-weight: 700;
  margin-bottom: 20px;
  line-height: 1.4;
}

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

.intro-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 24px;
}

.feature-pill {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
}

.pill-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--laser-grad);
}

.intro-media-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--card-shadow);
}

.intro-media-card img {
  border-radius: 12px;
  width: 100%;
  height: auto;
  display: block;
}

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

.service-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--card-shadow);
  transition: transform 0.2s, box-shadow 0.2s;
  display: flex;
  flex-direction: column;
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 30px -8px rgba(139, 92, 246, 0.15);
}

.service-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--laser-grad-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 22px;
}

.service-card h3 {
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 12px;
}

.service-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
  flex-grow: 1;
}

/* Workflow Steps */
.flow-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.flow-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  position: relative;
}

.flow-step-num {
  font-size: 24px;
  font-weight: 900;
  color: var(--laser-cyan);
  margin-bottom: 12px;
}

.flow-card h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
}

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

/* Model Matrix */
.matrix-wrap {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--card-shadow);
}

.tags-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

.tag-item {
  padding: 8px 16px;
  background: #f1f5f9;
  border: 1px solid #e2e8f0;
  border-radius: 9999px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  transition: all 0.2s;
}

.tag-item:hover {
  background: var(--laser-grad-soft);
  color: var(--laser-purple);
  border-color: rgba(139, 92, 246, 0.4);
}

/* Comparison Section */
.compare-container {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--card-shadow);
}

.rating-header {
  padding: 28px 32px;
  background: var(--laser-grad-soft);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}

.rating-summary {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.rating-score {
  font-size: 40px;
  font-weight: 900;
  color: var(--laser-purple);
}

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

.rating-stars {
  font-size: 20px;
  color: #f59e0b;
}

.rating-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
}

.table-responsive {
  width: 100%;
  overflow-x: auto;
}

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

.compare-table th, .compare-table td {
  padding: 16px 24px;
  font-size: 14px;
  border-bottom: 1px solid var(--border-color);
}

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

.compare-table td:first-child {
  font-weight: 600;
}

.highlight-col {
  background: rgba(139, 92, 246, 0.03);
  font-weight: 600;
  color: var(--laser-purple);
}

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

.gallery-item {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--card-shadow);
}

.gallery-thumb-box {
  width: 100%;
  background: #f1f5f9;
  position: relative;
  overflow: hidden;
}

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

.gallery-thumb-box:hover img {
  transform: scale(1.03);
}

.gallery-info {
  padding: 20px;
}

.gallery-info h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
}

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

/* 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-lg);
  padding: 24px;
  box-shadow: var(--card-shadow);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.review-text {
  font-size: 14px;
  color: var(--text-main);
  margin-bottom: 20px;
  line-height: 1.6;
}

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

.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--laser-grad);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 15px;
}

.author-meta h3 {
  font-size: 15px;
  font-weight: 700;
}

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

/* FAQ Accordion */
.faq-wrap {
  max-width: 880px;
  margin: 0 auto;
}

.faq-item {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-header {
  padding: 18px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  background: #ffffff;
  transition: background 0.2s;
}

.faq-header:hover {
  background: #f8fafc;
}

.faq-header h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
}

.faq-icon {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-muted);
  transition: transform 0.3s;
}

.faq-body {
  padding: 0 24px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
}

.faq-item.active .faq-body {
  padding: 0 24px 20px 24px;
  max-height: 300px;
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
  color: var(--laser-purple);
}

/* Articles & Form */
.grid-2col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
  align-items: start;
}

.contact-card, .articles-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--card-shadow);
}

.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 6px;
}

.form-control {
  width: 100%;
  padding: 12px 14px;
  font-size: 14px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  outline: none;
  background: #f8fafc;
  transition: border-color 0.2s, background 0.2s;
}

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

textarea.form-control {
  resize: vertical;
  min-height: 100px;
}

.article-list {
  list-style: none;
}

.article-item {
  padding: 14px 0;
  border-bottom: 1px solid var(--border-color);
}

.article-item:last-child {
  border-bottom: none;
}

.article-item a {
  text-decoration: none;
  color: var(--text-main);
  font-size: 14px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: color 0.2s;
}

.article-item a:hover {
  color: var(--laser-purple);
}

/* Footer */
.footer-wrap {
  background: #ffffff;
  border-top: 1px solid var(--border-color);
  padding: 60px 0 30px;
}

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

.footer-brand p {
  color: var(--text-muted);
  font-size: 14px;
  margin-top: 12px;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-main);
}

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

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

.footer-links a {
  text-decoration: none;
  color: var(--text-muted);
  font-size: 13px;
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--laser-purple);
}

.qr-box {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
}

.qr-box img {
  width: 100px;
  height: 100px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
}

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

.friend-links-box {
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.friend-links-box a {
  color: var(--text-muted);
  text-decoration: none;
}

.friend-links-box a:hover {
  color: var(--laser-purple);
}

.footer-bottom {
  text-align: center;
  font-size: 13px;
  color: var(--text-muted);
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
}

/* Float Service */
.float-kefu {
  position: fixed;
  bottom: 30px;
  right: 30px;
  z-index: 999;
  background: var(--laser-grad);
  width: 52px;
  height: 52px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  cursor: pointer;
  box-shadow: 0 8px 20px rgba(139, 92, 246, 0.4);
  transition: transform 0.2s;
}

.float-kefu:hover {
  transform: scale(1.08);
}

.float-qr-modal {
  position: absolute;
  bottom: 65px;
  right: 0;
  background: #ffffff;
  padding: 16px;
  border-radius: var(--radius-md);
  box-shadow: 0 10px 25px rgba(0,0,0,0.15);
  display: none;
  width: 160px;
  text-align: center;
  border: 1px solid var(--border-color);
}

.float-qr-modal img {
  width: 128px;
  height: 128px;
  margin-bottom: 8px;
}

.float-qr-modal p {
  font-size: 12px;
  color: var(--text-main);
  font-weight: 600;
}

.float-kefu:hover .float-qr-modal {
  display: block;
}

/* Responsive */
@media (max-width: 1024px) {
  .services-grid, .gallery-grid, .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .flow-grid, .hero-stats {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .header-container {
    height: 64px;
  }
  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    width: 100%;
    background: #ffffff;
    flex-direction: column;
    padding: 16px 24px;
    box-shadow: 0 10px 15px rgba(0,0,0,0.05);
    border-bottom: 1px solid var(--border-color);
  }
  .nav-links.active {
    display: flex;
  }
  .nav-item {
    width: 100%;
  }
  .nav-item a {
    padding: 12px 0;
    border-bottom: 1px solid #f1f5f9;
  }
  .mobile-toggle {
    display: block;
  }
  .hero-title {
    font-size: 32px;
  }
  .hero-stats {
    grid-template-columns: 1fr 1fr;
  }
  .intro-grid, .grid-2col {
    grid-template-columns: 1fr;
  }
  .services-grid, .gallery-grid, .reviews-grid, .flow-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
}