:root {
  --fu-nav-h: 68px;
  --fu-blue: #2563eb;
  --fu-blue-soft: #eff6ff;
  --fu-ink: #0f172a;
  --fu-muted: #64748b;
  --fu-line: #e2e8f0;
  --fu-page: #f5f8fc;
  --fu-radius: 0;
  --fu-hero-title: #0f172a;
  --fu-hero-sub: #475569;
  --fu-hero-title-size: 40px;
  --fu-hero-sub-size: 15px;
  --fu-hero-btn-radius: 6px;
  --fu-hero-overlay: 0.12;
}

body.fu-site {
  background: #fff;
  color: var(--fu-ink);
  font-family: "PingFang SC", "HarmonyOS Sans", "Segoe UI", "Microsoft YaHei", sans-serif;
}

.fu-site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--fu-nav-bg, #fff);
  box-shadow: 0 1px 0 var(--fu-line);
}
.fu-site-header.fu-nav-noborder { box-shadow: none; border-bottom: 0; }
.fu-site-header.fu-nav-shadow { box-shadow: 0 8px 24px rgba(15, 23, 42, .06); }
.fu-site-header.fu-nav-blur {
  background: var(--fu-nav-bg, rgba(255, 255, 255, .72)) !important;
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
}
.fu-site-header.fu-nav-transparent:not(.fu-nav-blur) {
  background: transparent !important;
  box-shadow: none;
}
.fu-announce {
  display: none;
  text-align: center;
  font-size: 13px;
  line-height: 1.4;
  padding: 8px 16px;
  background: #eff6ff;
  color: #2563eb;
}
.fu-announce.is-on { display: block; }
.fu-announce a { color: inherit; text-decoration: none; font-weight: 600; }
.fu-announce a:hover { text-decoration: underline; }
.fu-topbar-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
  min-height: var(--fu-nav-h);
  display: flex;
  align-items: center;
  gap: 18px;
  box-sizing: border-box;
}

/* 购物车页：顶栏左右贴边（覆盖后台 maxWidth 内联） */
@media (min-width: 992px) {
  body.fu-hide-site-footer .fu-topbar-inner,
  body:has(.fu-cart-page) .fu-topbar-inner,
  body:has(.fu-viewcart-page) .fu-topbar-inner {
    max-width: none !important;
    width: 100% !important;
    margin: 0 !important;
    padding-left: 16px !important;
    padding-right: 16px !important;
  }
  body.fu-hide-site-footer .fu-top-actions,
  body:has(.fu-cart-page) .fu-top-actions,
  body:has(.fu-viewcart-page) .fu-top-actions {
    margin-left: auto;
  }
}
.fu-logo {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  height: var(--fu-nav-h);
}
.fu-logo img {
  height: 36px;
  width: auto;
  max-width: 160px;
  object-fit: contain;
}
.fu-nav { flex: 1 1 auto; min-width: 0; }
.fu-menu {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 2px;
}
.fu-menu-item { position: relative; }
.fu-menu-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 8px 12px;
  color: var(--fu-ink);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  border-radius: 8px;
  position: relative;
  white-space: nowrap;
}
.fu-menu-link:hover { color: var(--fu-blue); background: var(--fu-blue-soft); }
.fu-caret {
  width: 0; height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid currentColor;
  opacity: .55;
  margin-left: 2px;
}
.fu-menu-badge {
  position: absolute;
  top: -2px;
  right: 2px;
  font-size: 10px;
  line-height: 1;
  padding: 2px 5px;
  border-radius: 6px 6px 6px 2px;
  color: #fff;
  background: #ef4444;
  font-weight: 700;
  transform: scale(.92);
}
.fu-dropdown {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 200px;
  max-width: 360px;
  background: #fff;
  border: 1px solid var(--fu-line);
  border-radius: 10px;
  box-shadow: 0 12px 32px rgba(15, 23, 42, .08);
  padding: 8px;
  z-index: 20;
}
.fu-menu-item:hover > .fu-dropdown { display: block; }
.fu-dropdown a {
  display: block;
  padding: 8px 12px;
  color: #334155;
  text-decoration: none;
  border-radius: 6px;
  font-size: 13px;
}
.fu-dropdown a:hover { background: var(--fu-blue-soft); color: var(--fu-blue); }
.fu-dropdown-group { padding: 4px 0 8px; }
.fu-dropdown-title {
  font-size: 12px;
  color: var(--fu-muted);
  padding: 6px 12px 4px;
  font-weight: 600;
}
.fu-top-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
}
.fu-search {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 36px;
  padding: 0 12px;
  border: 1px solid var(--fu-line);
  border-radius: 999px;
  background: #f8fafc;
  min-width: 160px;
}
.fu-search i { color: #94a3b8; font-size: 13px; }
.fu-search input {
  border: 0;
  outline: 0;
  background: transparent;
  width: 110px;
  font-size: 13px;
  color: var(--fu-ink);
}
.fu-search-wrap {
  position: relative;
  display: none;
}
.fu-hot-searches {
  display: none;
  position: absolute;
  left: 0;
  top: calc(100% + 6px);
  z-index: 30;
  gap: 6px;
  flex-wrap: wrap;
  max-width: 280px;
  padding: 8px;
  background: #fff;
  border: 1px solid #eef2f7;
  border-radius: 10px;
  box-shadow: 0 10px 24px rgba(15, 23, 42, .08);
}
.fu-search-wrap:focus-within .fu-hot-searches,
.fu-search-wrap:hover .fu-hot-searches {
  display: flex;
}
.fu-hot-searches a {
  font-size: 12px;
  color: #64748b;
  text-decoration: none;
  padding: 2px 8px;
  border-radius: 999px;
  background: #f1f5f9;
}
.fu-hot-searches a:hover { color: #2563eb; background: #eff6ff; }
.fu-drop-badge {
  display: inline-block;
  margin-left: 6px;
  font-style: normal;
  font-size: 10px;
  color: #ef4444;
  background: #fef2f2;
  border-radius: 4px;
  padding: 0 4px;
  vertical-align: middle;
}
.fu-link {
  color: #334155;
  text-decoration: none;
  font-size: 14px;
  white-space: nowrap;
}
.fu-link:hover { color: var(--fu-blue); }
.fu-btn-register {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 36px;
  padding: 0 14px;
  background: var(--fu-blue);
  color: #fff !important;
  border-radius: 0;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
}
.fu-btn-register:hover { filter: brightness(1.05); color: #fff !important; }
.fu-btn-register.is-outline {
  background: transparent !important;
  border: 1px solid var(--fu-blue);
  color: var(--fu-blue) !important;
}
.fu-btn-register.is-outline:hover { background: var(--fu-blue-soft) !important; }
.fu-btn-register.is-pill { border-radius: 999px !important; }
.fu-extra-links {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}
.fu-icon-link {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #475569;
  text-decoration: none;
}
.fu-icon-link:hover {
  background: var(--fu-blue-soft);
  color: var(--fu-blue);
}
.fu-nav-toggle {
  display: none;
  position: relative;
  width: 36px; height: 36px;
  border: 0; background: transparent;
  padding: 0;
  cursor: pointer;
  flex-shrink: 0;
  align-items: center;
  justify-content: center;
}
.fu-nav-toggle-bars {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 20px;
}
.fu-nav-toggle-bars i {
  display: block; height: 2px; width: 20px; background: #0f172a; border-radius: 2px;
}
.fu-nav-toggle-close {
  display: none;
  font-size: 28px;
  line-height: 1;
  color: #0f172a;
  font-weight: 300;
}
body.fu-mnav-open .fu-nav-toggle-bars { display: none; }
body.fu-mnav-open .fu-nav-toggle-close { display: block; }

.fu-user-btn {
  display: none;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  align-items: center;
  justify-content: center;
  background: var(--fu-blue, #2563eb);
  color: #fff !important;
  text-decoration: none;
  flex-shrink: 0;
  box-shadow: 0 2px 8px rgba(37, 99, 235, .28);
}
.fu-user-btn i { font-size: 14px; line-height: 1; }
.fu-user-btn .fu-user-avatar-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
  display: block;
}
.fu-user-btn:hover,
.fu-user-btn:active {
  filter: brightness(1.06);
  color: #fff !important;
}

.fu-user-btn.has-avatar,
a.fu-user-btn:has(.fu-user-avatar-img) {
  display: inline-flex;
  overflow: hidden;
  padding: 0;
  background: #e2e8f0;
  box-shadow: 0 1px 4px rgba(15, 23, 42, .12);
}
@media (min-width: 992px){
  a.fu-user-btn:has(.fu-user-avatar-img) {
    width: 36px;
    height: 36px;
  }
}
.fu-mobile-panel-actions { display: none; }

.fu-hero {
  position: relative;
  background: linear-gradient(180deg, #eef5ff 0%, #f8fafc 55%, #fff 100%);
  overflow: hidden;
}
.fu-hero-slide {
  display: none;
  position: relative;
  min-height: 420px;
  background-color: #eef5ff;
  background-size: cover;
  background-position: center right;
  background-repeat: no-repeat;
  align-items: center;
}
.fu-hero-slide.active { display: flex; }
.fu-hero-slide.has-image .fu-hero-mask {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(255,255,255,.92) 0%, rgba(255,255,255,.72) 42%, rgba(255,255,255,.15) 78%, transparent 100%);
  opacity: calc(0.55 + var(--fu-hero-overlay));
  pointer-events: none;
}
.fu-hero-slide:not(.has-image) .fu-hero-mask { display: none; }
.fu-hero-inner {
  position: relative;
  z-index: 1;
  max-width: 1280px;
  margin: 0 auto;
  padding: 56px 20px 64px;
  width: 100%;
}
.fu-hero-copy { max-width: 560px; }
.fu-hero-tag {
  display: inline-block;
  font-size: 13px;
  color: #1d4ed8;
  background: rgba(37, 99, 235, .08);
  border: 1px solid rgba(37, 99, 235, .14);
  border-radius: 999px;
  padding: 6px 12px;
  margin-bottom: 16px;
}
.fu-hero-slide.has-image .fu-hero-tag {
  background: rgba(255,255,255,.85);
}
.fu-hero-title {
  margin: 0 0 14px;
  font-size: var(--fu-hero-title-size);
  line-height: 1.25;
  font-weight: 800;
  color: var(--fu-hero-title);
  letter-spacing: -.02em;
}
.fu-hero-sub {
  margin: 0 0 26px;
  font-size: var(--fu-hero-sub-size);
  line-height: 1.75;
  color: var(--fu-hero-sub);
  max-width: 48ch;
  white-space: pre-line;
}
.fu-hero-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 128px;
  height: 44px;
  padding: 0 22px;
  background: var(--fu-blue);
  color: #fff !important;
  border-radius: var(--fu-hero-btn-radius);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
}
.fu-hero-cta:hover { filter: brightness(1.06); color: #fff !important; }

.fu-hero-prev,
.fu-hero-next {
  position: absolute;
  top: 50%;
  z-index: 3;
  transform: translateY(-50%);
  width: 44px;
  height: 44px;
  border: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, .88);
  color: #1e293b;
  box-shadow: 0 2px 12px rgba(15, 23, 42, .12);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s ease, background .2s ease, transform .2s ease;
}
.fu-hero.has-nav .fu-hero-prev,
.fu-hero.has-nav .fu-hero-next {
  opacity: 1;
  pointer-events: auto;
}
.fu-hero-prev { left: 18px; }
.fu-hero-next { right: 18px; }
.fu-hero-prev:hover,
.fu-hero-next:hover {
  background: #fff;
  color: var(--fu-blue);
}
.fu-hero-prev:active,
.fu-hero-next:active {
  transform: translateY(-50%) scale(.96);
}
@media (max-width: 768px){
  .fu-hero-prev,
  .fu-hero-next { display: none !important; }
}
.fu-hero-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
  padding: 0 0 22px;
  position: relative;
  z-index: 2;
  margin-top: -28px;
}
.fu-hero-dots span {
  width: 28px; height: 3px;
  border-radius: 2px;
  background: #cbd5e1;
  cursor: pointer;
}
.fu-hero-dots span.on { background: var(--fu-blue); }

.fu-features {
  background: var(--fu-page);
  padding: 18px 0 10px;
  margin-top: -4px;
}
.fu-features-grid {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}
.fu-feature-card {
  display: flex;
  align-items: center;
  gap: 14px;
  background: #fff;
  border: 1px solid #eef2f7;
  border-radius: 0;
  padding: 18px 16px;
  text-decoration: none;
  color: inherit;
  box-shadow: 0 4px 16px rgba(15, 23, 42, .04);
  transition: transform .2s ease, box-shadow .2s ease;
}
.fu-feature-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(37, 99, 235, .1);
  color: inherit;
}
.fu-feature-icon,
.fu-icon-box {
  width: 44px; height: 44px;
  border-radius: 0;
  background: var(--fu-blue-soft);
  color: var(--fu-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
  overflow: hidden;
}
.fu-icon-box img {
  width: 28px;
  height: 28px;
  object-fit: contain;
}
.fu-icon-box svg {
  width: 22px;
  height: 22px;
  fill: currentColor;
}
.fu-feature-title { font-size: 15px; font-weight: 700; margin: 0 0 4px; }
.fu-feature-desc { font-size: 12px; color: var(--fu-muted); margin: 0; line-height: 1.5; }

.fu-block {
  max-width: 1280px;
  margin: 0 auto;
  padding: 56px 20px 20px;
}
.fu-block-head { text-align: center; margin-bottom: 28px; }
.fu-block-title {
  margin: 0 0 10px;
  font-size: 28px;
  font-weight: 800;
  color: var(--fu-ink);
}
.fu-block-sub {
  margin: 0;
  color: var(--fu-muted);
  font-size: 15px;
  line-height: 1.7;
}
.fu-block-sub a {
  color: var(--fu-blue);
  text-decoration: none;
  font-weight: 600;
  margin-left: 6px;
}

.fu-prod-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin-bottom: 22px;
}
.fu-prod-tab {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--fu-line);
  background: #fff;
  color: #334155;
  border-radius: 999px;
  padding: 8px 16px;
  font-size: 13px;
  cursor: pointer;
}
.fu-prod-tab.has-icon { padding-left: 12px; }
.fu-prod-tab-icon {
  width: 20px;
  height: 20px;
  object-fit: cover;
  border-radius: 3px;
  flex-shrink: 0;
  box-shadow: 0 0 0 1px rgba(15, 23, 42, .08);
  background: #fff;
}
.fu-prod-tab-text { line-height: 1.2; }
.fu-prod-tab.on, .fu-prod-tab:hover {
  background: var(--fu-blue);
  border-color: var(--fu-blue);
  color: #fff;
}
.fu-prod-tab.on .fu-prod-tab-icon,
.fu-prod-tab:hover .fu-prod-tab-icon {
  box-shadow: 0 0 0 1px rgba(255, 255, 255, .35);
}
.fu-prod-panel { display: none; }
.fu-prod-panel.on { display: block; }
.fu-prod-panel-desc {
  text-align: center;
  color: var(--fu-muted);
  margin: 0 0 18px;
  font-size: 14px;
}
.fu-prod-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.fu-prod-card {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 14px;
  background: #fff;
  border: 1px solid #eef2f7;
  border-radius: 0;
  padding: 20px 18px 18px;
  text-decoration: none;
  color: inherit;
  transition: box-shadow .2s ease, transform .2s ease;
  min-height: 140px;
}
.fu-prod-card:hover {
  box-shadow: 0 12px 28px rgba(37, 99, 235, .1);
  transform: translateY(-2px);
  color: inherit;
}
.fu-prod-media {
  flex: 0 0 72px;
  width: 72px;
  height: 72px;
  border-radius: 10px;
  overflow: hidden;
  background: #f1f5f9;
  border: 1px solid #e8eef5;
}
.fu-prod-media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.fu-prod-body {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}
.fu-prod-tag {
  position: absolute;
  top: 12px;
  right: 12px;
  font-size: 11px;
  background: #fff1f2;
  color: #e11d48;
  border-radius: 6px;
  padding: 2px 8px;
  font-weight: 700;
  z-index: 1;
}
.fu-prod-card h4 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
  padding-right: 48px;
  line-height: 1.35;
}
.fu-prod-card p {
  margin: 0 0 14px;
  font-size: 13px;
  color: var(--fu-muted);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.fu-prod-more {
  margin-top: auto;
  font-size: 13px;
  color: var(--fu-blue);
  font-weight: 600;
}

.fu-sol-grid, .fu-why-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}
.fu-sol-card, .fu-why-card {
  background: #fff;
  border: 1px solid #eef2f7;
  border-radius: 0;
  padding: 22px 18px;
  text-decoration: none;
  color: inherit;
  box-shadow: 0 4px 14px rgba(15, 23, 42, .03);
}
.fu-sol-card:hover {
  box-shadow: 0 12px 28px rgba(37, 99, 235, .1);
  color: inherit;
}
.fu-sol-icon, .fu-why-icon, .fu-sol-card .fu-icon-box, .fu-why-card .fu-icon-box {
  width: 42px; height: 42px;
  border-radius: 0;
  background: var(--fu-blue-soft);
  color: var(--fu-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 12px;
}
.fu-sol-card h4, .fu-why-card h4 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
}
.fu-sol-card p, .fu-why-card p {
  margin: 0;
  font-size: 13px;
  color: var(--fu-muted);
  line-height: 1.6;
}

.fu-why {
  background: linear-gradient(180deg, #fff 0%, #f5f8fc 100%);
  padding-bottom: 40px;
}

.fu-popup-mask {
  position: fixed;
  inset: 0;
  z-index: 10050;
  background: rgba(15, 23, 42, .48);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
  backdrop-filter: blur(2px);
}
.fu-popup {
  position: relative;
  width: 100%;
  max-width: 520px;
  background: #fff;
  border-radius: 16px;
  padding: 28px 28px 22px;
  box-shadow: 0 24px 64px rgba(15, 23, 42, .28);
  animation: fuPopIn .28s ease;
}
@keyframes fuPopIn {
  from { opacity: 0; transform: translateY(12px) scale(.98); }
  to { opacity: 1; transform: none; }
}
.fu-popup-x {
  position: absolute;
  top: 12px; right: 14px;
  border: 0; background: transparent;
  font-size: 22px; line-height: 1;
  color: #94a3b8; cursor: pointer;
}
.fu-popup-title {
  margin: 0 0 14px;
  font-size: 20px;
  font-weight: 800;
  color: #0f172a;
  padding-right: 24px;
}
.fu-popup-image { margin-bottom: 14px; }
.fu-popup-image img {
  width: 100%;
  max-height: 220px;
  object-fit: cover;
  border-radius: 10px;
}
.fu-popup-body {
  font-size: 14px;
  line-height: 1.75;
  color: #475569;
  max-height: 42vh;
  overflow: auto;
  margin-bottom: 20px;
  white-space: normal;
}
.fu-popup-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  justify-content: flex-end;
}
.fu-popup-link {
  margin-right: auto;
  color: var(--fu-blue);
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
}
.fu-popup-btn {
  border: 1px solid #e2e8f0;
  background: #fff;
  color: #334155;
  border-radius: 8px;
  padding: 8px 16px;
  font-size: 13px;
  cursor: pointer;
}
.fu-popup-btn.primary {
  background: var(--fu-blue);
  border-color: var(--fu-blue);
  color: #fff;
}
.fu-popup-btn.ghost:hover { background: #f8fafc; }

.fu-popup-mask.is-side {
  align-items: flex-end;
  justify-content: flex-end;
  padding: 24px;
  background: transparent;
  pointer-events: none;
}
.fu-popup-mask.is-side .fu-popup {
  pointer-events: auto;
  box-shadow: 0 18px 50px rgba(15, 23, 42, .18);
  animation: fuSideIn .28s ease;
}
@keyframes fuSideIn {
  from { transform: translateX(24px); opacity: 0; }
  to { transform: none; opacity: 1; }
}

.fu-partners-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
}
.fu-partner-item {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 72px;
  padding: 12px 16px;
  background: #fff;
  border: 1px solid #eef2f7;
  border-radius: 0;
  color: #64748b;
  text-decoration: none;
  transition: border-color .2s, box-shadow .2s;
}
.fu-partner-item:hover {
  border-color: #cbd5e1;
  box-shadow: 0 8px 20px rgba(15, 23, 42, .06);
}
.fu-partner-item img {
  max-width: 100%;
  max-height: 40px;
  object-fit: contain;
}

.fu-faq-list {
  max-width: 880px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.fu-faq-item {
  background: #fff;
  border: 1px solid #eef2f7;
  border-radius: 0;
  padding: 0 18px;
}
.fu-faq-item summary {
  cursor: pointer;
  list-style: none;
  padding: 16px 0;
  font-weight: 600;
  color: #0f172a;
}
.fu-faq-item summary::-webkit-details-marker { display: none; }
.fu-faq-item summary::after {
  content: '+';
  float: right;
  color: #94a3b8;
  font-weight: 400;
}
.fu-faq-item[open] summary::after { content: '−'; }
.fu-faq-a {
  padding: 0 0 16px;
  color: #64748b;
  line-height: 1.7;
  font-size: 14px;
}

.fu-side-service {
  position: fixed;
  right: 18px;
  bottom: 120px;
  z-index: 10030;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.fu-side-service.is-left {
  right: auto;
  left: 18px;
}
.fu-side-btn {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: #fff;
  border: 1px solid #e2e8f0;
  color: #2563eb;
  display: grid;
  place-items: center;
  text-decoration: none;
  box-shadow: 0 8px 20px rgba(15, 23, 42, .08);
  position: relative;
  cursor: pointer;
}
.fu-side-btn:hover { background: #eff6ff; }
.fu-side-pop {
  display: none;
  position: absolute;
  right: calc(100% + 10px);
  top: 50%;
  transform: translateY(-50%);
  background: #fff;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  padding: 10px;
  box-shadow: 0 12px 28px rgba(15, 23, 42, .12);
  text-align: center;
  width: 120px;
}
.fu-side-service.is-left .fu-side-pop {
  right: auto;
  left: calc(100% + 10px);
}
.fu-side-pop img { width: 100px; height: 100px; display: block; margin-bottom: 6px; }
.fu-side-pop span { font-size: 12px; color: #64748b; }
.fu-side-btn.has-pop:hover .fu-side-pop { display: block; }
.fu-side-hours {
  width: 44px;
  padding: 8px 0;
  border-radius: 12px;
  background: #0f172a;
  color: #fff;
  font-size: 10px;
  text-align: center;
  line-height: 1.2;
  box-shadow: 0 8px 20px rgba(15, 23, 42, .18);
}
.fu-side-hours i { display: block; margin-bottom: 4px; font-size: 12px; }
.fu-side-hours span { display: block; padding: 0 4px; word-break: break-all; }

/* 购物车页：全端隐藏站点页脚 */
body.fu-hide-site-footer #fuFooterCustom,
body.fu-hide-site-footer #fuFooterLegacy,
body.fu-hide-site-footer #fuCta,
body.fu-hide-site-footer .fu-footer,
body.fu-hide-site-footer .fu-footer-legacy,
body.fu-hide-site-footer .fu-cta,
body.fu-hide-site-footer .footer,
body.fu-hide-site-footer .foot,
body.fu-hide-site-footer .beianNumber {
  display: none !important;
}

@media (max-width: 768px) {
  body.fu-hide-mobile-footer #fuFooterCustom,
  body.fu-hide-mobile-footer #fuFooterLegacy,
  body.fu-hide-mobile-footer #fuCta,
  body.fu-hide-mobile-footer .fu-footer,
  body.fu-hide-mobile-footer .fu-footer-legacy,
  body.fu-hide-mobile-footer .fu-cta,
  body.fu-hide-mobile-footer .footer,
  body.fu-hide-mobile-footer .foot,
  body.fu-hide-mobile-footer .beianNumber {
    display: none !important;
  }
}

.fu-cta {
  background: linear-gradient(120deg, #1d4ed8 0%, #2563eb 45%, #0ea5e9 100%);
  color: #fff;
}
.fu-cta-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 36px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}
.fu-cta-inner h3 { margin: 0 0 8px; font-size: 24px; font-weight: 800; }
.fu-cta-inner p { margin: 0; opacity: .92; font-size: 14px; }
.fu-cta-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 120px;
  height: 42px;
  padding: 0 22px;
  border-radius: 8px;
  background: #fff;
  color: #1d4ed8 !important;
  font-weight: 700;
  text-decoration: none;
  box-shadow: 0 8px 24px rgba(15, 23, 42, .15);
}
.fu-cta-btn:hover { filter: brightness(1.03); color: #1d4ed8 !important; }

.fu-footer {
  --fu-ft-link: #e2e8f0;
  --fu-ft-link-hover: #60a5fa;
  background: #0b1220;
  color: #94a3b8;
}
.fu-ft-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
}
.fu-ft-grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(4, 1fr);
  gap: 28px 20px;
  padding-bottom: 28px;
  border-bottom: 1px solid rgba(148, 163, 184, .18);
}
.fu-ft-logo {
  height: 36px;
  width: auto;
  max-width: 160px;
  margin-bottom: 14px;
  display: block;
  opacity: .95;
}
.fu-ft-brand-title {
  font-size: 16px;
  font-weight: 700;
  color: #f8fafc;
  margin-bottom: 10px;
}
.fu-ft-brand-desc {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  max-width: 280px;
}
.fu-ft-col h4 {
  margin: 0 0 14px;
  font-size: 14px;
  font-weight: 700;
  color: #f1f5f9;
}
.fu-ft-col ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
.fu-ft-col li { margin-bottom: 8px; }
.fu-ft-col a, .fu-ft-contact a {
  color: var(--fu-ft-link);
  text-decoration: none;
  font-size: 13px;
}
.fu-ft-col a:hover, .fu-ft-contact a:hover { color: var(--fu-ft-link-hover); }
.fu-ft-contact {
  font-size: 13px;
  line-height: 1.7;
  margin-bottom: 8px;
}
.fu-ft-qr-list {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
.fu-ft-qr-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  font-size: 12px;
}
.fu-ft-qr-item img {
  border-radius: 8px;
  background: #fff;
  padding: 4px;
  object-fit: contain;
}
.fu-ft-friends {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  align-items: center;
  padding: 16px 0;
  font-size: 13px;
  border-bottom: 1px solid rgba(148, 163, 184, .12);
}
.fu-ft-friends span { color: #cbd5e1; font-weight: 600; margin-right: 4px; }
.fu-ft-friends a { color: var(--fu-ft-link); text-decoration: none; }
.fu-ft-friends a:hover { color: var(--fu-ft-link-hover); }
.fu-ft-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  padding: 18px 0 4px;
  font-size: 12px;
}
.fu-ft-bottom-links {
  display: flex;
  align-items: center;
  gap: 10px;
}
.fu-ft-bottom-links a { color: var(--fu-ft-link); text-decoration: none; }
.fu-ft-bottom-links i {
  width: 1px; height: 10px;
  background: rgba(148,163,184,.35);
  display: inline-block;
}
.fu-ft-extra { padding-bottom: 8px; font-size: 12px; opacity: .85; }

.fu-mnav {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 10020;
  pointer-events: none;
}
.fu-mnav.is-open { pointer-events: auto; }
.fu-mnav-mask {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, .28);
  opacity: 0;
  transition: opacity .25s ease;
}
.fu-mnav.is-open .fu-mnav-mask { opacity: 1; }
.fu-mnav-panel {
  position: absolute;
  left: 0; right: 0;
  top: var(--fu-nav-h, 56px);
  bottom: 0;
  background: #f4f6f9;
  transform: translateY(-8px);
  opacity: 0;
  transition: transform .28s ease, opacity .28s ease;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.fu-mnav.is-open .fu-mnav-panel {
  transform: translateY(0);
  opacity: 1;
}
.fu-mnav-cols {
  flex: 1;
  min-height: 0;
  display: flex;
  align-items: stretch;
}
.fu-mnav-left {
  width: 38%;
  max-width: 168px;
  background: linear-gradient(180deg, #f1f4f8 0%, #eef2f7 100%);
  border-right: 1px solid #e2e8f0;
  display: flex;
  flex-direction: column;
  min-height: 0;
}
.fu-mnav-left-scroll {
  flex: 1;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: 8px 0 12px;
}
.fu-mnav-cat {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 6px;
  width: 100%;
  border: 0;
  background: transparent;
  text-align: left;
  padding: 14px 12px 14px 16px;
  font-size: 14px;
  font-weight: 500;
  color: #334155;
  cursor: pointer;
  line-height: 1.35;
}
.fu-mnav-cat::before {
  content: '';
  position: absolute;
  left: 0; top: 10px; bottom: 10px;
  width: 3px;
  border-radius: 0 3px 3px 0;
  background: transparent;
}
.fu-mnav-cat.is-active {
  color: var(--fu-blue, #2563eb);
  font-weight: 700;
  background: rgba(37, 99, 235, .06);
}
.fu-mnav-cat.is-active::before { background: var(--fu-blue, #2563eb); }
.fu-mnav-cat .fu-mnav-caret {
  font-size: 10px;
  color: #94a3b8;
  flex-shrink: 0;
  transition: transform .2s ease;
}
.fu-mnav-cat.has-child .fu-mnav-caret { transform: rotate(0deg); }
.fu-mnav-cat.is-active.has-child .fu-mnav-caret {
  color: var(--fu-blue, #2563eb);
  transform: rotate(180deg);
}
.fu-mnav-home {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin: 10px 10px calc(12px + env(safe-area-inset-bottom, 0));
  height: 40px;
  border: 1.5px solid var(--fu-blue, #2563eb);
  border-radius: 10px;
  color: var(--fu-blue, #2563eb) !important;
  text-decoration: none;
  font-size: 13px;
  font-weight: 600;
  background: #fff;
  flex-shrink: 0;
  box-shadow: 0 2px 8px rgba(37, 99, 235, .08);
}
.fu-mnav-home:active { background: #eff6ff; }
.fu-mnav-right {
  flex: 1;
  min-width: 0;
  background: #fff;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.fu-mnav-right-head {
  padding: 16px 18px 10px;
  font-size: 15px;
  font-weight: 700;
  color: #0f172a;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.fu-mnav-right-head a {
  color: inherit;
  text-decoration: none;
}
.fu-mnav-right-head a:after {
  content: ' ›';
  color: #94a3b8;
  font-weight: 400;
}
.fu-mnav-right-head .fu-menu-badge,
.fu-mnav-right-head .fu-mnav-badge {
  display: inline-block;
  font-size: 10px;
  font-weight: 700;
  color: #fff;
  background: #ef4444;
  border-radius: 4px;
  padding: 1px 6px;
  line-height: 1.4;
}
.fu-mnav-right-body {
  flex: 1;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: 4px 10px 24px;
}
.fu-mnav-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 13px 10px;
  border-radius: 10px;
  color: #334155;
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
}
.fu-mnav-link:active,
.fu-mnav-link:hover {
  background: #f8fafc;
  color: var(--fu-blue, #2563eb);
}
.fu-mnav-link .fu-drop-badge,
.fu-mnav-link .fu-mnav-badge {
  font-style: normal;
  font-size: 10px;
  color: #fff;
  background: #ef4444;
  border-radius: 4px;
  padding: 1px 5px;
}
.fu-mnav-group-title {
  margin: 10px 10px 4px;
  font-size: 12px;
  font-weight: 700;
  color: #94a3b8;
  letter-spacing: .02em;
}
.fu-mnav-empty {
  padding: 28px 16px;
  color: #94a3b8;
  font-size: 13px;
  text-align: center;
}
body.fu-mnav-open { overflow: hidden; }
body.fu-mnav-open .fu-site-header {
  z-index: 10030;
}
body.fu-has-tabbar .fu-mnav-panel {
  bottom: calc(56px + env(safe-area-inset-bottom, 0));
}

@media (max-width: 1100px){
  .fu-site-header { position: sticky; }
  .fu-topbar-inner {
    justify-content: space-between;
    gap: 12px;
    min-height: 56px;
  }
  .fu-logo { flex: 0 1 auto; min-width: 0; }
  .fu-logo img { max-width: min(160px, 46vw); }
  .fu-top-actions {
    margin-left: auto;
    gap: 10px;
    flex-shrink: 0;
  }
  .fu-desktop-only,
  .fu-search-wrap,
  .fu-search,
  .fu-extra-links,
  .fu-hot-searches { display: none !important; }
  .fu-user-btn { display: inline-flex; }
  .fu-nav-toggle { display: inline-flex; }
  .fu-nav { display: none !important; }
  .fu-mnav { display: block; }

  .fu-features-grid, .fu-sol-grid, .fu-why-grid { grid-template-columns: repeat(2, 1fr); }
  .fu-partners-grid { grid-template-columns: repeat(3, 1fr); }
  .fu-prod-grid { grid-template-columns: repeat(2, 1fr); }
  .fu-prod-card {
    gap: 12px;
    padding: 16px 14px 14px;
    min-height: 0;
  }
  .fu-prod-media {
    flex-basis: 56px;
    width: 56px;
    height: 56px;
    border-radius: 8px;
  }
  .fu-prod-card h4 { font-size: 15px; }
  .fu-prod-card p {
    -webkit-line-clamp: 2;
    margin-bottom: 10px;
  }

  
  .fu-footer {
    padding-top: 22px !important;
    padding-bottom: 14px !important;
  }
  .fu-ft-inner {
    padding: 0 14px !important;
  }
  .fu-ft-grid {
    grid-template-columns: 1fr 1fr !important;
    gap: 14px 12px !important;
    padding-bottom: 14px !important;
  }
  .fu-ft-brand {
    grid-column: 1 / -1;
  }
  .fu-ft-logo {
    height: 28px !important;
    margin-bottom: 8px !important;
  }
  .fu-ft-brand-title {
    font-size: 14px !important;
    margin-bottom: 6px !important;
  }
  .fu-ft-brand-desc {
    max-width: none !important;
    font-size: 12px !important;
    line-height: 1.55 !important;
  }
  .fu-ft-col h4 {
    margin: 0 0 8px !important;
    font-size: 13px !important;
  }
  .fu-ft-col li { margin-bottom: 6px !important; }
  .fu-ft-col a,
  .fu-ft-contact a,
  .fu-ft-contact {
    font-size: 12px !important;
  }
  .fu-ft-qr-list {
    gap: 10px !important;
  }
  .fu-ft-qr-item img {
    width: 72px !important;
    height: 72px !important;
    max-width: 100%;
  }
  .fu-ft-friends {
    padding: 10px 0 !important;
    gap: 8px 12px !important;
    font-size: 12px !important;
  }
  .fu-ft-bottom {
    flex-direction: column !important;
    align-items: flex-start !important;
    gap: 6px !important;
    padding: 10px 0 4px !important;
    font-size: 11px !important;
  }
  .fu-cta-inner {
    padding: 22px 14px !important;
    gap: 12px !important;
  }
  .fu-cta-inner h3 { font-size: 18px !important; }
}
@media (max-width: 640px){
  .fu-features-grid, .fu-sol-grid, .fu-why-grid, .fu-prod-grid { grid-template-columns: 1fr; }
  .fu-partners-grid { grid-template-columns: repeat(2, 1fr); }
  .fu-side-service { display: none; }
  .fu-prod-card {
    align-items: center;
    gap: 12px;
    padding: 14px 12px;
  }
  .fu-prod-media {
    flex-basis: 52px;
    width: 52px;
    height: 52px;
  }
  .fu-prod-card h4 {
    font-size: 15px;
    padding-right: 44px;
    margin-bottom: 6px;
  }
  .fu-prod-card p {
    font-size: 12px;
    -webkit-line-clamp: 2;
    margin-bottom: 8px;
  }
  .fu-prod-more { font-size: 12px; }
  .fu-hero-title { font-size: 28px !important; }
  .fu-hero-slide,
  .fu-hero-slide.has-image {
    background-position: center center !important;
  }
  .fu-hero-slide.has-image .fu-hero-mask {
    background: linear-gradient(180deg, rgba(255,255,255,.92) 0%, rgba(255,255,255,.78) 100%);
  }
  
  .fu-ft-grid {
    grid-template-columns: 1fr 1fr !important;
  }
  .fu-ft-qr-item img {
    width: 64px !important;
    height: 64px !important;
  }
  .fu-popup { padding: 22px 18px 16px; }
}

.fu-tabbar {
  display: none;
  position: fixed;
  left: 0; right: 0; bottom: 0;
  z-index: 10040;
  height: 56px;
  padding-bottom: env(safe-area-inset-bottom, 0);
  background: var(--tb-bg, #161616);
  border-top: 1px solid var(--tb-border, rgba(255,255,255,.08));
  align-items: stretch;
  justify-content: space-around;
  color: var(--tb-color, #9ca3af);
  box-shadow: 0 -4px 16px rgba(15, 23, 42, .06);
}
.fu-tabbar.theme-light {
  box-shadow: 0 -4px 18px rgba(15, 23, 42, .08);
}
@media (max-width: 768px){
  .fu-tabbar { display: flex; }
  body.fu-has-tabbar { padding-bottom: calc(56px + env(safe-area-inset-bottom, 0)); }
  body.fu-has-tabbar .pls-back2top { display: none !important; }
  body.fu-has-tabbar .fu-popup-mask { padding-bottom: 56px; }
  .fu-prod-tabs {
    justify-content: flex-start;
    overflow-x: auto;
    flex-wrap: nowrap;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 4px;
  }
  .fu-prod-tab {
    border-radius: 0;
    border: 0;
    background: transparent;
    color: #64748b;
    padding: 10px 14px;
    white-space: nowrap;
    border-bottom: 3px solid transparent;
  }
  .fu-prod-tab.on, .fu-prod-tab:hover {
    background: transparent;
    color: var(--fu-blue);
    border-bottom-color: var(--fu-blue);
  }
  .fu-block-title { font-size: 22px; }
}
.fu-tabbar-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  text-decoration: none !important;
  color: var(--tb-color, #9ca3af) !important;
  font-size: 11px;
  min-width: 0;
}
.fu-tabbar-item i,
.fu-tabbar-item svg,
.fu-tabbar-item .fu-tabbar-svg {
  color: inherit !important;
  fill: none !important;
  stroke: currentColor;
}
.fu-tabbar-icon {
  width: 22px; height: 22px;
  display: grid; place-items: center;
  font-size: 18px;
  color: inherit !important;
}
.fu-tabbar-img {
  width: 22px; height: 22px;
  object-fit: contain;
}
.fu-tabbar-text {
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  padding: 0 4px;
  color: inherit !important;
}
.fu-tabbar-item.on {
  color: var(--tb-active, #3b82f6) !important;
}

.fu-tabbar-svg{width:20px;height:20px;display:block}