message: Support fixed sidebars
diff: -@import "common";
  +@import 'common';
  +#app {
  + z-index: 0;
  +}
  +.z-top-container,
  .international-header {
  position: sticky !important;
  top: 0 !important;
  + z-index: 1;
  }
  .van-popper-avatar,
  .van-popper-vip,
  overflow: auto;
  @include no-scrollbar();
  }
  -@import "../feeds-panel-shared";
  +@import '../feeds-panel-shared';
  .adaptive-scroll {
  min-height: unset !important;
  position: static !important;
  }
  }
  +.bili-dyn-home--member {
  + --center-width: 632px;
  + --gap: 8px;
  + --fixed-offset: calc(var(--center-width) + (100vw - var(--center-width)) / 2 + var(--gap));
  + section.sticky {
  + position: static !important;
  + }
  + aside {
  + position: fixed !important;
  + &.left {
  + right: var(--fixed-offset);
  + }
  + &.right {
  + left: var(--fixed-offset);
  + }
  + }
  + @media screen and (min-width: 1921px) {
  + --center-width: 32.92vw;
  + }
  + @media screen and (min-width: 2497px) {
  + --center-width: 822px;
  + }
  +}
  