:root {
  --primary-red: #ff4757;
  --primary-orange: #ff7f50;
  --primary-yellow: #ffa502;
  --primary-green: #2ed573;
  --primary-cyan: #1e90ff;
  --primary-blue: #3742fa;
  --primary-purple: #9b59b6;
  --rainbow-gradient: linear-gradient(135deg, #ff4757 0%, #ff7f50 15%, #ffa502 30%, #2ed573 50%, #1e90ff 70%, #9b59b6 100%);
  --rainbow-subtle: linear-gradient(135deg, rgba(255,71,87,0.08) 0%, rgba(255,127,80,0.08) 20%, rgba(46,213,115,0.08) 50%, rgba(30,144,255,0.08) 80%, rgba(155,89,182,0.08) 100%);
  --rainbow-border: linear-gradient(90deg, #ff4757, #ffa502, #2ed573, #1e90ff, #9b59b6);
  --text-main: #1e293b;
  --text-muted: #64748b;
  --bg-page: #f8fafc;
  --bg-card: #ffffff;
  --border-light: #e2e8f0;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
  --shadow-md: 0 8px 24px rgba(0,0,0,0.06);
  --shadow-lg: 0 16px 36px rgba(0,0,0,0.08);
}
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--text-main);
  background-color: var(--bg-page);
  line-height: 1.6;
  overflow-x: hidden;
  background-image: radial-gradient(at 0% 0%, rgba(255, 71, 87, 0.03) 0px, transparent 50%),
                    radial-gradient(at 100% 0%, rgba(30, 144, 255, 0.03) 0px, transparent 50%),
                    radial-gradient(at 50% 100%, rgba(46, 213, 115, 0.03) 0px, transparent 50%);
  background-attachment: fixed;
}
a {
  text-decoration: none;
  color: inherit;
  transition: all 0.25s ease;
}
ul, ol {
  list-style: none;
}
.main-container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 20px;
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  box-shadow: 0 2px 10px rgba(0,0,0,0.02);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.brand-group {
  display: flex;
  align-items: center;
  gap: 12px;
}
.brand-logo-wrap {
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.brand-title-wrap h2 {
  font-size: 1.25rem;
  font-weight: 800;
  color: #0f172a;
  letter-spacing: -0.5px;
}
.brand-title-wrap p {
  font-size: 0.75rem;
  color: var(--text-muted);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 0;
}
.nav-links a {
  font-size: 0.95rem;
  font-weight: 600;
  color: #334155;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
}
.nav-links a:hover {
  color: var(--primary-blue);
  background: rgba(30, 144, 255, 0.08);
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}
.btn-primary {
  background: var(--rainbow-gradient);
  color: #ffffff !important;
  font-weight: 700;
  padding: 10px 22px;
  border-radius: 30px;
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 14px rgba(255, 71, 87, 0.25);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(255, 71, 87, 0.35);
}
.btn-secondary {
  background: #ffffff;
  color: #1e293b;
  border: 1px solid var(--border-light);
  font-weight: 600;
  padding: 10px 20px;
  border-radius: 30px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.btn-secondary:hover {
  background: #f1f5f9;
  border-color: #cbd5e1;
}
.mobile-nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: #1e293b;
  padding: 4px;
}
.section-wrapper {
  padding: 70px 0;
  position: relative;
}
.section-wrapper.alt-bg {
  background-color: #ffffff;
  border-top: 1px solid #edf2f7;
  border-bottom: 1px solid #edf2f7;
}
.section-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 50px auto;
}
.section-badge {
  display: inline-block;
  padding: 4px 14px;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  color: #ffffff;
  background: var(--rainbow-gradient);
  border-radius: 20px;
  margin-bottom: 12px;
}
.section-title {
  font-size: 2.1rem;
  font-weight: 800;
  color: #0f172a;
  margin-bottom: 14px;
  line-height: 1.3;
}
.section-desc {
  font-size: 1rem;
  color: var(--text-muted);
}
.hero-section {
  padding: 80px 0 60px 0;
  background: var(--rainbow-subtle);
  border-bottom: 1px solid var(--border-light);
  text-align: center;
}
.hero-content {
  max-width: 900px;
  margin: 0 auto;
}
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.9);
  padding: 6px 18px;
  border-radius: 30px;
  border: 1px solid rgba(226, 232, 240, 0.8);
  font-size: 0.85rem;
  font-weight: 600;
  color: #475569;
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
}
.hero-tag span {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--primary-green);
}
.hero-title {
  font-size: 2.6rem;
  font-weight: 900;
  line-height: 1.25;
  color: #0f172a;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}
.hero-subtitle {
  font-size: 1.15rem;
  color: #475569;
  margin-bottom: 36px;
  line-height: 1.7;
}
.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 50px;
}
.hero-actions .btn-primary {
  font-size: 1.05rem;
  padding: 14px 34px;
}
.hero-metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 20px;
}
.metric-card {
  background: #ffffff;
  padding: 24px 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.metric-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.metric-value {
  font-size: 2rem;
  font-weight: 800;
  background: var(--rainbow-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 6px;
}
.metric-label {
  font-size: 0.9rem;
  font-weight: 600;
  color: #334155;
  margin-bottom: 4px;
}
.metric-sub {
  font-size: 0.78rem;
  color: #94a3b8;
}
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
}
.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.service-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 28px;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  transition: all 0.25s ease;
  display: flex;
  flex-direction: column;
}
.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: #cbd5e1;
}
.service-icon-bar {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  font-weight: 800;
  font-size: 1.2rem;
  color: #ffffff;
  background: var(--rainbow-gradient);
}
.service-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 12px;
}
.service-card p {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.65;
  flex-grow: 1;
}
.service-tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 16px;
}
.service-tag {
  font-size: 0.75rem;
  background: #f1f5f9;
  color: #475569;
  padding: 3px 8px;
  border-radius: 4px;
  font-weight: 600;
}
.tag-cloud-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  padding: 24px;
  background: #ffffff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
}
.model-pill {
  padding: 8px 16px;
  font-size: 0.85rem;
  font-weight: 700;
  border-radius: 20px;
  background: #f8fafc;
  color: #334155;
  border: 1px solid #e2e8f0;
  transition: all 0.2s ease;
}
.model-pill:hover {
  background: var(--primary-blue);
  color: #ffffff;
  border-color: var(--primary-blue);
  transform: translateY(-2px);
}
.steps-container {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  position: relative;
}
.step-item {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 26px 20px;
  text-align: center;
  position: relative;
}
.step-number {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--rainbow-gradient);
  color: #ffffff;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px auto;
  font-size: 0.95rem;
}
.step-item h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 8px;
}
.step-item p {
  font-size: 0.85rem;
  color: var(--text-muted);
}
.table-responsive {
  width: 100%;
  overflow-x: auto;
  background: #ffffff;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
}
.compare-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}
.compare-table th, .compare-table td {
  padding: 18px 22px;
  border-bottom: 1px solid #edf2f7;
  font-size: 0.92rem;
}
.compare-table th {
  background: #f8fafc;
  font-weight: 700;
  color: #1e293b;
}
.compare-table td:first-child {
  font-weight: 700;
  color: #0f172a;
}
.badge-highlight {
  display: inline-block;
  padding: 4px 10px;
  font-size: 0.8rem;
  font-weight: 700;
  color: #ffffff;
  background: #2ed573;
  border-radius: 4px;
}
.badge-muted {
  display: inline-block;
  padding: 4px 10px;
  font-size: 0.8rem;
  font-weight: 600;
  color: #64748b;
  background: #f1f5f9;
  border-radius: 4px;
}
.score-banner {
  background: var(--rainbow-subtle);
  border: 2px solid rgba(255, 71, 87, 0.2);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}
.score-box {
  display: flex;
  align-items: center;
  gap: 14px;
}
.score-val {
  font-size: 2.6rem;
  font-weight: 900;
  color: #ff4757;
  line-height: 1;
}
.score-stars {
  font-size: 1.25rem;
  color: #ffa502;
  margin-bottom: 2px;
}
.score-text {
  font-size: 0.95rem;
  font-weight: 700;
  color: #0f172a;
}
.img-media-box {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  background: #ffffff;
}
.img-media-box img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.3s ease;
}
.img-media-box:hover img {
  transform: scale(1.02);
}
.media-caption {
  padding: 12px 16px;
  font-size: 0.85rem;
  font-weight: 600;
  color: #475569;
  background: #ffffff;
  border-top: 1px solid #edf2f7;
}
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.review-card {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.review-rating {
  color: #ffa502;
  font-size: 0.9rem;
  margin-bottom: 12px;
}
.review-text {
  font-size: 0.92rem;
  color: #334155;
  line-height: 1.6;
  margin-bottom: 18px;
}
.review-author {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px solid #f1f5f9;
  padding-top: 14px;
}
.author-avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--rainbow-gradient);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
}
.author-info h5 {
  font-size: 0.9rem;
  font-weight: 700;
  color: #0f172a;
}
.author-info p {
  font-size: 0.78rem;
  color: var(--text-muted);
}
.faq-accordion {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.faq-item {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: all 0.25s ease;
}
.faq-item.active {
  border-color: var(--primary-cyan);
  box-shadow: var(--shadow-sm);
}
.faq-question {
  padding: 18px 24px;
  font-size: 1rem;
  font-weight: 700;
  color: #0f172a;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
}
.faq-icon {
  font-size: 1.2rem;
  font-weight: 400;
  color: #94a3b8;
  transition: transform 0.25s ease;
}
.faq-item.active .faq-icon {
  transform: rotate(45deg);
  color: var(--primary-cyan);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  background: #fafafa;
}
.faq-answer-inner {
  padding: 0 24px 18px 24px;
  font-size: 0.92rem;
  color: #475569;
  line-height: 1.65;
}
.contact-container {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 36px;
  align-items: start;
}
.contact-info-card {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 30px;
  box-shadow: var(--shadow-sm);
}
.contact-meta-item {
  margin-bottom: 20px;
}
.contact-meta-item strong {
  display: block;
  font-size: 0.85rem;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 4px;
}
.contact-meta-item span {
  font-size: 1rem;
  font-weight: 600;
  color: #0f172a;
}
.qrcode-wrap {
  margin-top: 24px;
  padding: 16px;
  background: #f8fafc;
  border-radius: var(--radius-sm);
  display: inline-block;
  text-align: center;
}
.qrcode-wrap img {
  width: 140px;
  height: 140px;
  display: block;
  margin: 0 auto 8px auto;
  border-radius: 4px;
}
.form-card {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 36px;
  box-shadow: var(--shadow-sm);
}
.form-group {
  margin-bottom: 18px;
}
.form-label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: #1e293b;
  margin-bottom: 6px;
}
.form-control {
  width: 100%;
  padding: 12px 16px;
  font-size: 0.95rem;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  background: #f8fafc;
  color: #0f172a;
  outline: none;
  transition: border-color 0.2s ease;
}
.form-control:focus {
  border-color: var(--primary-cyan);
  background: #ffffff;
}
textarea.form-control {
  resize: vertical;
  min-height: 100px;
}
.article-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.article-item {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 18px 22px;
  transition: transform 0.2s ease;
}
.article-item:hover {
  transform: translateX(4px);
  border-color: var(--primary-cyan);
}
.article-item a {
  font-weight: 700;
  font-size: 0.98rem;
  color: #0f172a;
  display: block;
  margin-bottom: 6px;
}
.article-item a:hover {
  color: var(--primary-blue);
}
.article-item p {
  font-size: 0.85rem;
  color: var(--text-muted);
}
.site-footer {
  background: #ffffff;
  border-top: 1px solid var(--border-light);
  padding: 60px 0 30px 0;
  color: #475569;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-col h4 {
  font-size: 1rem;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 18px;
}
.footer-links li {
  margin-bottom: 10px;
}
.footer-links a {
  font-size: 0.9rem;
  color: #64748b;
}
.footer-links a:hover {
  color: var(--primary-blue);
}
.friend-links-box {
  border-top: 1px solid #edf2f7;
  padding: 20px 0;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 0.88rem;
}
.friend-links-box a {
  color: #64748b;
}
.friend-links-box a:hover {
  color: var(--primary-blue);
}
.footer-bottom {
  border-top: 1px solid #edf2f7;
  padding-top: 24px;
  text-align: center;
  font-size: 0.85rem;
  color: #94a3b8;
}
.float-toolbar {
  position: fixed;
  right: 20px;
  bottom: 30px;
  z-index: 999;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.float-btn {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: #ffffff;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-weight: 700;
  color: #1e293b;
  transition: all 0.2s ease;
}
.float-btn:hover {
  background: var(--rainbow-gradient);
  color: #ffffff;
  transform: scale(1.08);
}
@media (max-width: 1024px) {
  .hero-metrics-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-3, .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .steps-container {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 768px) {
  .mobile-nav-toggle {
    display: block;
  }
  .nav-links {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: #ffffff;
    flex-direction: column;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-light);
    box-shadow: var(--shadow-md);
  }
  .nav-links.active {
    display: flex;
  }
  .hero-title {
    font-size: 2rem;
  }
  .grid-3, .grid-2, .reviews-grid, .steps-container, .article-list, .contact-container {
    grid-template-columns: 1fr;
  }
  .hero-metrics-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .header-actions {
    display: none;
  }
}