.rb-logo-loop {
  --logo-loop-gap: 48px;
  --logo-loop-height: 54px;
  position: relative;
  width: 100%;
  overflow: hidden;
  padding: 30px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  color: #fff;
}

.rb-logo-loop::before,
.rb-logo-loop::after {
  content: "";
  position: absolute;
  z-index: 2;
  top: 0;
  bottom: 0;
  width: clamp(36px, 10vw, 150px);
  pointer-events: none;
}

.rb-logo-loop::before {
  left: 0;
  background: linear-gradient(90deg, #222 0%, rgba(34, 34, 34, 0) 100%);
}

.rb-logo-loop::after {
  right: 0;
  background: linear-gradient(270deg, #222 0%, rgba(34, 34, 34, 0) 100%);
}

.rb-logo-loop__track {
  display: flex;
  width: max-content;
  will-change: transform;
  user-select: none;
}

.rb-logo-loop__sequence {
  display: flex;
  flex: 0 0 auto;
  align-items: center;
  gap: var(--logo-loop-gap);
  padding-right: var(--logo-loop-gap);
  margin: 0;
  list-style: none;
}

.rb-logo-loop__item {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  min-width: 72px;
  height: var(--logo-loop-height);
  opacity: 0.84;
  filter: grayscale(0.35) brightness(1.15);
  transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1), opacity 0.25s ease, filter 0.25s ease;
}

.rb-logo-loop__item:hover {
  z-index: 1;
  opacity: 1;
  filter: none;
  transform: scale(1.12);
}

.rb-logo-loop__item img {
  display: block;
  width: auto;
  max-width: 230px;
  height: 100%;
  object-fit: contain;
  pointer-events: none;
  -webkit-user-drag: none;
}

.rb-logo-loop__item--social img {
  width: var(--logo-loop-height);
  max-width: none;
}

@media (max-width: 760px) {
  .rb-logo-loop {
    --logo-loop-gap: 34px;
    --logo-loop-height: 40px;
    padding: 24px 0;
  }

  .rb-logo-loop__item img {
    max-width: 160px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .rb-logo-loop__track {
    transform: translate3d(0, 0, 0) !important;
  }

  .rb-logo-loop__item {
    transition: none;
  }
}

.footer-box .footer-ft__icon {
  width: clamp(126px, 15vw, 190px);
  height: auto;
  object-fit: contain;
}

@media (max-width: 760px) {
  .footer-box .footer-ft__icon {
    width: 150px;
    max-width: 48vw;
  }
}

/* Light footer and soft white LogoLoop fade. */
.footer-box {
  background: #fff !important;
  color: #52606d !important;
}

.footer-box .footer-wrap {
  background: transparent !important;
}

.footer-box .footer-ft,
.footer-box .rb-logo-loop {
  border-color: #e5e7eb !important;
}

.footer-box .footer-ft__nav,
.footer-box .footer-ft__nav a,
.footer-box .footer-ft__nav p,
.footer-box .footer-ft__nav span {
  color: #52606d !important;
}

.footer-box .rb-logo-loop {
  color: #172033;
  background: linear-gradient(90deg, #fff 0%, #f7fbff 18%, #f2f8ff 50%, #f7fbff 82%, #fff 100%) !important;
}

.footer-box .rb-logo-loop::before,
.footer-box .rb-logo-loop::after {
  width: clamp(56px, 12vw, 180px);
}

.footer-box .rb-logo-loop::before {
  background: linear-gradient(90deg, #fff 0%, rgba(255, 255, 255, 0.88) 36%, rgba(255, 255, 255, 0) 100%);
}

.footer-box .rb-logo-loop::after {
  background: linear-gradient(270deg, #fff 0%, rgba(255, 255, 255, 0.88) 36%, rgba(255, 255, 255, 0) 100%);
}

.footer-box .rb-logo-loop__item {
  opacity: 1;
  filter: none;
}

/*
样式模块：首屏资源加载遮罩。
作用：页面未完成加载前覆盖现有界面；body 进入离场状态后淡出；加载完成后不再生成伪元素。
控制区域：整个视口，不影响正文布局及资源下载。
修改位置：淡出时长、配色、加载文字和进度条尺寸均在此处调整。
注意事项：使用伪元素而非额外 DOM，确保 CSS 解析完成时即可显示，减少首屏闪现。
*/
body:not(.site-loaded)::before,
body:not(.site-loaded)::after {
  position: fixed;
  z-index: 2147483646;
  pointer-events: none;
  opacity: 1;
  transition: opacity .48s ease, visibility .48s ease;
}

body:not(.site-loaded)::before {
  content: "";
  inset: 0;
  background:
    linear-gradient(135deg, #fff 0%, #f7fbff 52%, #f2fbfa 100%);
}

body:not(.site-loaded)::after {
  content: "uu6.me\A\A正在加载";
  inset: 0;
  display: grid;
  place-content: center;
  white-space: pre;
  text-align: center;
  color: #0c2945;
  font: 600 22px/1.25 Georgia, "Times New Roman", serif;
  letter-spacing: .11em;
  text-shadow: 0 1px 0 #fff, 0 2px 6px rgba(15, 47, 79, .18);
}

body.site-loader-leaving::before,
body.site-loader-leaving::after {
  opacity: 0;
  visibility: hidden;
}

/* 参考加载演示的品牌文字、进度条与百分比区域，由脚本在首屏解析后创建。 */
body.site-loader-enhanced:not(.site-loaded)::after {
  content: none;
}

#site-loader-content {
  position: fixed;
  inset: 0;
  z-index: 2147483647;
  display: grid;
  place-items: center;
  pointer-events: none;
  color: #fff;
  opacity: 1;
  transition: opacity .72s cubic-bezier(.22,.61,.36,1), visibility .72s;
}

body.site-loader-leaving #site-loader-content {
  opacity: 0;
  visibility: hidden;
}

.site-loader-box {
  width: min(420px, 78vw);
  text-align: center;
  transform: translateY(-10px);
}

.site-loader-brand {
  margin-right: -.22em;
  font: 800 clamp(32px, 6vw, 58px)/1 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: .22em;
  color: #102b46;
  opacity: 0;
  animation: site-loader-brand-in .9s .15s forwards cubic-bezier(.16,1,.3,1);
}

.site-loader-subtitle {
  margin-top: 12px;
  color: rgba(12, 41, 69, .52);
  font: 11px/1.3 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: .36em;
  opacity: 0;
  animation: site-loader-fade-up .8s .45s forwards ease;
}

.site-loader-track {
  position: relative;
  width: 100%;
  height: 2px;
  margin-top: 42px;
  overflow: hidden;
  background: rgba(12, 41, 69, .14);
}

.site-loader-bar {
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, #117cf2, #37d8a6, #117cf2);
  box-shadow: 0 0 16px rgba(17, 124, 242, .45);
  transition: width .18s ease;
}

.site-loader-meta {
  display: flex;
  justify-content: space-between;
  margin-top: 14px;
  color: rgba(12, 41, 69, .58);
  font: 10px/1.2 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: .18em;
}

.site-loader-pulse {
  display: inline-block;
  width: 5px;
  height: 5px;
  margin-right: 7px;
  border-radius: 50%;
  background: #117cf2;
  animation: site-loader-pulse 1s infinite ease-in-out;
}

@keyframes site-loader-brand-in {
  from { opacity: 0; transform: translateY(24px) scale(.94); filter: blur(8px); }
  to { opacity: 1; transform: none; filter: blur(0); }
}

@keyframes site-loader-fade-up {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: none; }
}

@keyframes site-loader-pulse {
  0%, 100% { opacity: .25; transform: scale(.8); }
  50% { opacity: 1; transform: scale(1.15); }
}

@media (prefers-reduced-motion: reduce) {
  body:not(.site-loaded)::before,
  body:not(.site-loaded)::after {
    transition-duration: .16s;
  }

  .site-loader-brand,
  .site-loader-subtitle,
  .site-loader-pulse {
    animation: none;
    opacity: 1;
  }
}