:root {
  --primary: #FF5A1F;
  --primary-deep: #D93800;
  --primary-light: #FFF2EB;
  --primary-glow: rgba(255, 90, 31, 0.12);
  --accent: #E02E00;
  --text-main: #1D2129;
  --text-muted: #4E5969;
  --text-soft: #86909C;
  --bg-page: #FAF9F6;
  --bg-card: #FFFFFF;
  --border: #F0E6DE;
  --border-focus: #FF8F5E;
  --shadow-sm: 0 4px 12px rgba(255, 90, 31, 0.05);
  --shadow-md: 0 10px 25px rgba(255, 90, 31, 0.08);
  --shadow-hover: 0 16px 36px rgba(217, 56, 0, 0.14);
  --radius: 12px;
  --container-max: 1200px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  background-color: var(--bg-page);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
}

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

img {
  max-width: 100%;
  height: auto;
  display: block;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

/* Header */
header.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

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

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

.brand-box .ai-page-logo {
  height: 40px;
  width: auto;
}

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

.nav-links li a {
  display: block;
  padding: 8px 14px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-main);
  border-radius: 6px;
}

.nav-links li a:hover,
.nav-links li a.active {
  color: var(--primary);
  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 22px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 8px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.25s ease;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, #FF6F37 0%, var(--primary-deep) 100%);
  color: #FFFFFF !important;
  box-shadow: 0 4px 14px rgba(255, 90, 31, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(255, 90, 31, 0.4);
}

.btn-outline {
  border-color: var(--primary);
  color: var(--primary);
  background: #FFFFFF;
}

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

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}

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

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

.section-head {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 50px;
}

.tag-badge {
  display: inline-block;
  padding: 4px 14px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary);
  background: var(--primary-light);
  border: 1px solid rgba(255, 90, 31, 0.2);
  border-radius: 30px;
  margin-bottom: 14px;
}

.section-title {
  font-size: 2.1rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.35;
  margin-bottom: 12px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
}

/* Hero Section (No Images as instructed) */
.hero-section {
  padding: 85px 0 65px;
  background: radial-gradient(circle at 80% 20%, #FFE9DE 0%, rgba(255, 255, 255, 0) 65%),
              linear-gradient(180deg, #FFFFFF 0%, #FAF6F2 100%);
  border-bottom: 1px solid var(--border);
}

.hero-wrap {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: center;
}

.hero-content h1 {
  font-size: 2.6rem;
  line-height: 1.25;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 18px;
}

.hero-content h1 span {
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-content p {
  font-size: 1.12rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 28px;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 35px;
}

.hero-stats-panel {
  background: #FFFFFF;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 30px;
  box-shadow: var(--shadow-md);
  position: relative;
}

.hero-stats-panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--primary-deep));
  border-radius: var(--radius) var(--radius) 0 0;
}

.stat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.stat-item {
  padding: 16px;
  background: var(--bg-page);
  border-radius: 8px;
  border: 1px solid #F2E8E0;
}

.stat-num {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 4px;
}

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

.tags-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 24px;
}

.tag-pill {
  font-size: 0.82rem;
  background: #FFFFFF;
  border: 1px solid var(--border);
  padding: 4px 10px;
  border-radius: 20px;
  color: var(--text-muted);
}

/* Service 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;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: all 0.25s ease;
  position: relative;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--border-focus);
}

.card-icon {
  width: 44px;
  height: 44px;
  background: var(--primary-light);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  color: var(--primary);
  font-weight: 700;
  font-size: 1.1rem;
}

.card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-main);
}

.card p {
  font-size: 0.94rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Review / Comparison */
.review-highlight {
  background: linear-gradient(135deg, #FFF6F0 0%, #FFFFFF 100%);
  border: 2px solid var(--primary-light);
  border-radius: var(--radius);
  padding: 30px;
  margin-bottom: 30px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}

.review-score-box {
  display: flex;
  align-items: center;
  gap: 18px;
}

.score-huge {
  font-size: 3.2rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
}

.score-details h4 {
  font-size: 1.2rem;
  color: var(--text-main);
  margin-bottom: 4px;
}

.score-stars {
  color: #FF9800;
  font-size: 1.1rem;
  letter-spacing: 2px;
}

.table-responsive {
  width: 100%;
  overflow-x: auto;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: #FFFFFF;
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.95rem;
}

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

.comparison-table th {
  background: #FDF9F6;
  font-weight: 700;
  color: var(--text-main);
}

.comparison-table tr:hover {
  background: #FFFDFC;
}

.highlight-col {
  background: #FFF8F4;
  font-weight: 600;
  color: var(--primary-deep);
}

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

.step-card {
  background: #FFFFFF;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  position: relative;
}

.step-badge {
  font-size: 1.5rem;
  font-weight: 800;
  color: #FFD4C2;
  margin-bottom: 10px;
}

/* Testimonials */
.testimonial-card {
  background: #FFFFFF;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.testimonial-body {
  font-size: 0.94rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 18px;
}

.testimonial-user {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px solid #F5EFEB;
  padding-top: 14px;
}

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

.user-info h5 {
  font-size: 0.95rem;
  color: var(--text-main);
  margin-bottom: 2px;
}

.user-info span {
  font-size: 0.8rem;
  color: var(--text-soft);
}

/* Media Showcase */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.gallery-item {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  background: #FFFFFF;
  box-shadow: var(--shadow-sm);
}

.gallery-item .ai-page-image,
.gallery-item img {
  width: 100%;
  height: auto;
  object-fit: cover;
}

.gallery-caption {
  padding: 16px 20px;
}

.gallery-caption h4 {
  font-size: 1.05rem;
  color: var(--text-main);
  margin-bottom: 4px;
}

.gallery-caption p {
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* FAQ Accordion */
.faq-list {
  max-width: 860px;
  margin: 0 auto;
}

.faq-item {
  background: #FFFFFF;
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 12px;
  overflow: hidden;
  transition: all 0.25s;
}

.faq-question {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 18px 22px;
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--text-main);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

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

.faq-icon {
  font-size: 1.2rem;
  transition: transform 0.25s;
  color: var(--primary);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out;
  padding: 0 22px;
  background: #FFFDFB;
  color: var(--text-muted);
  font-size: 0.94rem;
  line-height: 1.7;
}

.faq-answer p {
  padding-bottom: 18px;
}

.faq-item.active .faq-answer {
  max-height: 240px;
}

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

/* Form and Contact */
.contact-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 30px;
}

.form-box {
  background: #FFFFFF;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow-sm);
}

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

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text-main);
}

.form-control {
  width: 100%;
  padding: 11px 14px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.95rem;
  color: var(--text-main);
  background: #FAFAFA;
  transition: border-color 0.25s;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
  background: #FFFFFF;
}

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

.contact-info-box {
  background: #FFFFFF;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.contact-detail-item {
  margin-bottom: 16px;
}

.contact-detail-item strong {
  display: block;
  font-size: 0.88rem;
  color: var(--text-soft);
  margin-bottom: 2px;
}

.contact-detail-item span,
.contact-detail-item a {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-main);
}

.qr-code-wrapper {
  background: var(--bg-page);
  padding: 16px;
  border-radius: 8px;
  border: 1px solid var(--border);
  display: inline-block;
  text-align: center;
  margin-top: 14px;
}

.qr-code-wrapper img {
  width: 130px;
  height: 130px;
  margin: 0 auto 8px;
}

/* Articles */
.article-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
  background: #FFFFFF;
}

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

.article-item a {
  color: var(--text-main);
  font-weight: 500;
}

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

/* Footer */
footer.site-footer {
  background: #191B1F;
  color: #B5B9C2;
  padding: 50px 0 25px;
  border-top: 3px solid var(--primary);
}

.footer-main {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 30px;
  margin-bottom: 35px;
}

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

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

.footer-links li {
  margin-bottom: 8px;
}

.footer-links a {
  color: #9AA0AB;
  font-size: 0.9rem;
}

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

.friendly-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 15px;
}

.friendly-links a {
  color: #9AA0AB;
  font-size: 0.88rem;
  border: 1px solid #31353E;
  padding: 4px 10px;
  border-radius: 4px;
}

.friendly-links a:hover {
  color: #FFFFFF;
  border-color: var(--primary);
}

.footer-bottom {
  text-align: center;
  border-top: 1px solid #282C34;
  padding-top: 22px;
  font-size: 0.85rem;
  color: #717784;
}

/* Floating Tools */
.floating-assistant {
  position: fixed;
  right: 20px;
  bottom: 30px;
  z-index: 999;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.float-btn {
  width: 46px;
  height: 46px;
  background: #FFFFFF;
  border-radius: 50%;
  box-shadow: 0 4px 15px rgba(0,0,0,0.15);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 1.1rem;
  cursor: pointer;
  transition: 0.25s;
}

.float-btn:hover {
  background: var(--primary);
  color: #FFFFFF;
}

/* Responsive */
@media (max-width: 992px) {
  .hero-wrap {
    grid-template-columns: 1fr;
  }
  .grid-3 {
    grid-template-columns: 1fr 1fr;
  }
  .grid-4 {
    grid-template-columns: 1fr 1fr;
  }
  .steps-container {
    grid-template-columns: 1fr 1fr;
  }
  .contact-grid {
    grid-template-columns: 1fr;
  }
  .gallery-grid {
    grid-template-columns: 1fr;
  }
  .footer-main {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .menu-toggle {
    display: flex;
  }
  .nav-links {
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: #FFFFFF;
    flex-direction: column;
    padding: 20px;
    border-bottom: 1px solid var(--border);
    display: none;
    box-shadow: 0 10px 20px rgba(0,0,0,0.08);
  }
  .nav-links.active {
    display: flex;
  }
  .hero-content h1 {
    font-size: 1.95rem;
  }
  .grid-3, .grid-4, .steps-container {
    grid-template-columns: 1fr;
  }
  .footer-main {
    grid-template-columns: 1fr;
  }
}