.back-to-top {
  position: fixed;
  right: 4rem;
  bottom: 3rem;
  z-index: 999;
  width: 3.25rem;
  height: 3.25rem;
  padding: 0;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
  border-radius: 50%;
  background-color: #379ff7;
  color: #fff;
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  line-height: 1;
  text-decoration: none;
  -webkit-box-shadow: 0 0.375rem 1.125rem #379ff773;
  box-shadow: 0 0.375rem 1.125rem #379ff773;
  opacity: 0;
  visibility: hidden;
  -webkit-transform: translateY(0.75rem);
  -ms-transform: translateY(0.75rem);
  transform: translateY(0.75rem);
  -webkit-transition: opacity 0.25s ease, visibility 0.25s ease, -webkit-transform 0.25s ease;
  transition: opacity 0.25s ease, visibility 0.25s ease, transform 0.25s ease;
}
.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  -webkit-transform: translateY(0);
  -ms-transform: translateY(0);
  transform: translateY(0);
}
.back-to-top:hover {
  background-color: #5cb0f8;
}
@media (max-width: 47.9375rem) {
  .back-to-top {
    right: 2.25rem;
    bottom: 8.125rem;
    width: 3rem;
    height: 3rem;
    font-size: 0.75rem;
  }
}
.back-to-news {
  position: fixed;
  right: 4rem;
  bottom: 7.25rem;
  z-index: 999;
  width: 3.25rem;
  height: 3.25rem;
  padding: 0;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
  border-radius: 50%;
  background-color: #379ff7;
  color: #fff;
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  line-height: 1;
  text-decoration: none;
  -webkit-box-shadow: 0 0.375rem 1.125rem #379ff773;
  box-shadow: 0 0.375rem 1.125rem #379ff773;
  opacity: 0;
  visibility: hidden;
  -webkit-transform: translateY(0.75rem);
  -ms-transform: translateY(0.75rem);
  transform: translateY(0.75rem);
  -webkit-transition: opacity 0.25s ease, visibility 0.25s ease, -webkit-transform 0.25s ease;
  transition: opacity 0.25s ease, visibility 0.25s ease, transform 0.25s ease;
}
.back-to-news.is-visible {
  opacity: 1;
  visibility: visible;
  -webkit-transform: translateY(0);
  -ms-transform: translateY(0);
  transform: translateY(0);
}
.back-to-news:hover {
  background-color: #5cb0f8;
}
@media (max-width: 47.9375rem) {
  .back-to-news {
    right: 2.25rem;
    bottom: 11.875rem;
    width: 3rem;
    height: 3rem;
    font-size: 0.75rem;
  }
}
.faq-item .faq-q {
  width: 100%;
  text-align: left;
  background: transparent;
  cursor: pointer;
  -webkit-transition: background-color 0.2s ease;
  transition: background-color 0.2s ease;
}
.faq-item .faq-q:hover,
.faq-item .faq-q:focus { background-color: #f4f8fd; outline: none; }
.faq-item .faq-q[aria-expanded="true"] { background-color: #f4f8fd; }
.faq-toggle {
  display: inline-block;
  -webkit-transition: -webkit-transform 0.2s ease;
  transition: transform 0.2s ease;
}
.faq-item .faq-q[aria-expanded="true"] .faq-toggle { -webkit-transform: rotate(180deg); -ms-transform: rotate(180deg); transform: rotate(180deg); }
.faq-a { -webkit-animation: faqFadeIn 0.25s ease; animation: faqFadeIn 0.25s ease; }
@-webkit-keyframes faqFadeIn {
  from { opacity: 0; -webkit-transform: translateY(-0.25rem); transform: translateY(-0.25rem); }
  to   { opacity: 1; -webkit-transform: translateY(0); transform: translateY(0); }
}
@keyframes faqFadeIn {
  from { opacity: 0; transform: translateY(-0.25rem); }
  to   { opacity: 1; transform: translateY(0); }
}
.product-item .product-q {
  width: 100%;
  text-align: left;
  background: transparent;
  cursor: pointer;
  -webkit-transition: background-color 0.2s ease;
  transition: background-color 0.2s ease;
}
.product-item .product-q:hover,
.product-item .product-q:focus { background-color: #f4f8fd; outline: none; }
.product-item .product-q[aria-expanded="true"] { background-color: #f4f8fd; }
.product-toggle {
  display: inline-block;
  -webkit-transition: -webkit-transform 0.2s ease;
  transition: transform 0.2s ease;
}
.product-item .product-q[aria-expanded="true"] .product-toggle { -webkit-transform: rotate(180deg); -ms-transform: rotate(180deg); transform: rotate(180deg); }
.product-a { -webkit-animation: faqFadeIn 0.25s ease; animation: faqFadeIn 0.25s ease; }
@media (min-width: 48rem) and (max-width: 74.9375rem) {
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
  .card-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (min-width: 48rem) {
  .footer-bottom p {
    font-size: 0.8125rem;
    line-height: 1.7;
    white-space: normal;
    overflow: visible;
    text-overflow: clip;
    overflow-wrap: break-word;
  }
}
@media (max-width: 47.9375rem) {
  body {
    font-size: 0.9375rem;
    background-color: #f2f4f7;
  }
  .section {
    padding: 2.5rem 0;
  }
  .sec-title {
    font-size: 1.5rem;
  }
  .container { padding: 0 1.25rem; }
  .pb-4 {
    padding-bottom: 1rem;
  }
  .text-block p, .text-block li,
  .faq-item .faq-a, .faq-item .faq-a p,
  .qual-card li,
  .contact-block p { font-size: 0.9375rem; }
  .nav-inner {
    -webkit-box-orient: horizontal; -webkit-box-direction: normal;
    -ms-flex-direction: row; flex-direction: row;
    -ms-flex-wrap: wrap; flex-wrap: wrap;
    -webkit-box-align: center; -ms-flex-align: center; align-items: center;
    min-height: 3.75rem;
  }
  .nav-brand {
    -webkit-box-flex: 1; -ms-flex: 1 1 auto; flex: 1 1 auto;
    display: -webkit-box; display: -ms-flexbox; display: flex;
    -webkit-box-align: center; -ms-flex-align: center; align-items: center;
    padding: 0.5rem 0;
    min-width: 0;
    gap: 0.625rem;
  }
  .nav-brand-logo { height: 2rem; width: auto; -ms-flex-negative: 0; flex-shrink: 0; }
  .nav-brand-text {
    -webkit-box-flex: 1; -ms-flex: 1 1 auto; flex: 1 1 auto;
    min-width: 0;
    overflow: hidden;
  }
  .nav-brand-text strong { font-size: 1rem; }
  .nav-brand-text span { display: none; }
  .nav-hamburger { -ms-flex-negative: 0; flex-shrink: 0; }
  .nav-wechat { margin-left: 0.5rem; }
  .nav-qr-btn { width: 2.75rem; height: 2.75rem; padding: 0; }
  .nav-wecom-icon { width: 1.375rem; height: 1.375rem; }
  .nav-qr-pop { top: calc(100% + 0.375rem); width: 10.5rem; padding: 0.5rem 0; }
  .nav-pop-qr { width: 8rem; height: 8rem; padding-left: .1rem; }
  .nav-links {
    -ms-flex-preferred-size: 100%; flex-basis: 100%;
    -webkit-box-ordinal-group: 4; -ms-flex-order: 3; order: 3;
    width: 100%;
    display: none;
  }
  .peer:checked ~ .nav-links {
    display: -ms-grid;
    display: grid;
    -ms-grid-columns: 1fr 1fr 1fr; grid-template-columns: repeat(3, 1fr);
    -webkit-column-gap: 0; column-gap: 0;
    row-gap: 0;
    padding: 0.5rem 0;
    -webkit-animation: navMenuIn 0.3s ease-out both;
    animation: navMenuIn 0.3s ease-out both;
  }
  .peer:checked ~ .nav-links a {
    display: block;
    text-align: center;
    padding: 0.875rem 0.125rem;
    font-size: 0.875rem;
    -webkit-box-sizing: border-box; box-sizing: border-box;
  }
  .hero {
    padding: 3rem 0;
  }
  .hero-title { font-size: 1.375rem; }
  .hero-desc { font-size: 0.9375rem; }
  .hero-img-placeholder { min-height: 11.25rem; }
  .stat-band { grid-template-columns: 1fr; gap: 1.125rem; }
  .stat-band .num { font-size: 1.9375rem; }
  .stat-grid { grid-template-columns: 1fr; gap: 0.875rem; }
  .stat-card .num { font-size: 1.9375rem; }
  .card-grid { grid-template-columns: 1fr; gap: 1rem; }
  .steps { grid-template-columns: 1fr; gap: 1rem; }
  .card-media { padding: 0.75rem 0.75rem 0; }
  .card .card-body { padding: 1.125rem; }
  .text-block, .contact-block, .qual-card { padding: 1.125rem; }
  .step { padding: 1.125rem; }
  .step img { height: 16rem; }
  .data-table { display: block; overflow-x: auto; -webkit-overflow-scrolling: touch; white-space: nowrap; }
  .data-table td { white-space: normal; overflow-wrap: break-word; }
  .contact-item strong { display: block; margin-bottom: 0.25rem; }
  .contact-item { font-size: 0.8125rem; }
  .map-container iframe { height: 14.0625rem; }
  .news-item { padding: 1.125rem; }
  .news-item .news-date { width: 4rem; height: 4rem; }
  .site-footer { padding: 1.5rem 0; }
  .footer-grid { grid-template-columns: 1fr; gap: 1.5rem; margin-bottom: 1.25rem; }
  .footer-facts span { font-size: 0.75rem; padding: 0.375rem 0.75rem; }
  .wechat-qr { width: 7rem; height: 7rem; border-radius: .75rem; padding-left: .2rem; }
  .wechat-qr.contact-qr { padding-left: .2rem; }
  .footer-bottom p {
    white-space: normal;
    overflow: visible;
    text-overflow: clip;
    line-height: 1.7;
    font-size: 0.75rem;
    overflow-wrap: break-word;
  }
  .partners-switcher {
    height: 100%;
    margin: 0.5rem auto 0;
    -webkit-mask-image: none;
            mask-image: none;
  }
  .partners-track {
    width: 600%;
    gap: 1rem;
    grid-template-rows: repeat(3, auto);
    justify-content: space-between;
  }
  .partner-card {
    height: auto;
    padding: 0.5rem 0.375rem;
    min-width: 0;
  }
  .partner-card img { max-height: 4rem; max-width: 100%; min-width: 0; }
  .partner-more span { font-size: 0.625rem; line-height: 1.3; }
  .partner-card { gap: 0.1rem; }
  .partner-card img { max-height: 2.75rem; }
  .partner-card .partner-name { font-size: 0.625rem; }
}
@media print {
  .site-header, .site-footer { display: none; }
}
  @-webkit-keyframes navMenuIn {
    from { opacity: 0; -webkit-transform: translateY(-0.625rem); transform: translateY(-0.625rem); }
    to   { opacity: 1; -webkit-transform: translateY(0); transform: translateY(0); }
  }
  @keyframes navMenuIn {
    from { opacity: 0; transform: translateY(-0.625rem); }
    to   { opacity: 1; transform: translateY(0); }
  }