backup-drawing-toggle {
  position: absolute;
  top: var(--backup-drawing-top, 0px);
  right: 4%;
  z-index: 100;
  /* z-index: var(--z-index-fixed, 1020); */
  display: block;
  width: 140px;
  height: 230px;
  --spider-y: 86px;
  --spider-silk-length: 110px;
  --spider-silk-drop-length: 244px;
  --spider-drop-distance: 220px;
  pointer-events: none;
  transition: top 180ms ease;
}

backup-drawing-toggle.is-fixed {
  position: fixed;
  top: 0;
  right: auto;
}

backup-drawing-toggle[hidden] { display: none; }

backup-drawing-toggle.is-hidden-by-tab-boundary {
  visibility: hidden;
  opacity: 0;
  pointer-events: none;
}

.backup-drawing__sway {
  position: relative;
  display: block;
  width: 100%;
  height: 100%;
  transform-origin: 50% 0;
  /* animation: backup-drawing-sway 4.6s ease-in-out infinite; */
}

.backup-drawing__button {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  padding: 0;
  color: #372722;
  cursor: pointer;
  background: transparent;
  border: 0;
  pointer-events: auto;
  -webkit-tap-highlight-color: transparent;
}

.backup-drawing__button:hover { filter: brightness(1.12); }
.backup-drawing__button:focus-visible { outline: 2px solid #372722; outline-offset: 4px; }

.backup-drawing__silk {
  position: absolute;
  z-index: 1;
  top: 0;
  left: 50%;
  width: max(1px, calc(1.15px * var(--spider-scale, 1)));
  height: var(--spider-silk-length, 110px);
  transform: translateX(-50%);
  transform-origin: 50% 0;
  background: #fff;
  border-radius: 999px;
  transition: height 720ms cubic-bezier(.42, 0, .28, 1);
  pointer-events: none;
}

html[data-resource-image-mode="backup"] .backup-drawing__silk {
  background: #fff;
}

.backup-drawing__spider {
  position: absolute;
  z-index: 2;
  top: 0;
  left: 50%;
  width: calc(52px * var(--spider-scale, 1));
  height: calc(72px * var(--spider-scale, 1));
  display: block;
  transform-origin: 50% 20%;
  transform: translate(-50%, var(--spider-y, 86px));
  transition: transform 760ms cubic-bezier(.42, 0, .28, 1);
  pointer-events: none;
  will-change: transform;
}

.backup-drawing__spider svg {
  display: block;
  position: relative;
  width: 100%;
  height: 100%;
  overflow: visible;
  filter: drop-shadow(0 .7px .8px rgba(0, 0, 0, .22));
  will-change: transform;
}

.backup-drawing__spider svg > line { visibility: hidden; }

.backup-drawing__sway.is-crawling .backup-drawing__spider svg {
  animation: backup-drawing-crawl 1.05s cubic-bezier(.45,.05,.35,1) infinite;
}

.backup-drawing__spider svg .st1 { fill: #372722; }
.backup-drawing__spider svg .st0 { stroke: #8a7d6c; }

.backup-drawing__spider svg .backup-drawing__leg-group {
  transform-box: fill-box;
  will-change: transform;
}

.backup-drawing__spider svg .gait-1 { transform-origin: 18.9% 80%; }
.backup-drawing__spider svg .gait-2 { transform-origin: 5.7% 82%; }
.backup-drawing__spider svg .gait-3 { transform-origin: 90.5% 5.6%; }
.backup-drawing__spider svg .gait-4 { transform-origin: 65% 8.5%; }
.backup-drawing__spider svg .gait-5 { transform-origin: 90.7% 89.7%; }
.backup-drawing__spider svg .gait-6 { transform-origin: 80% 92.6%; }
.backup-drawing__spider svg .gait-7 { transform-origin: 6% .4%; }
.backup-drawing__spider svg .gait-8 { transform-origin: 29.7% 2.5%; }

.backup-drawing__sway.is-pulling {
  animation: none !important;
  transform: rotate(0deg);
}

.backup-drawing__sway.is-pulling .backup-drawing__spider {
  animation: backup-drawing-drop 225ms cubic-bezier(.12,.72,.18,1) both,
    backup-drawing-retract 560ms cubic-bezier(.33,1,.68,1) 235ms both;
}

.backup-drawing__sway.is-pulling .backup-drawing__silk {
  animation: backup-drawing-silk-drop 225ms cubic-bezier(.12,.72,.18,1) both,
    backup-drawing-silk-retract 560ms cubic-bezier(.33,1,.68,1) 235ms both;
}

@keyframes backup-drawing-sway {
  0%, 100% { transform: rotate(-1deg); }
  45% { transform: rotate(1.2deg); }
}

@keyframes backup-drawing-crawl {
  0% { transform: translate(0, 1px) rotate(-0.9deg); }
  20% { transform: translate(.4px, .4px) rotate(-.3deg); }
  45% { transform: translate(.8px, -.5px) rotate(0deg); }
  70% { transform: translate(.4px, -1.1px) rotate(.5deg); }
  100% { transform: translate(0, -1.6px) rotate(.9deg); }
}

@keyframes backup-drawing-drop {
  from { transform: translate(-50%, var(--spider-y, 86px)); }
  to { transform: translate(-50%, var(--spider-drop-distance)); }
}

@keyframes backup-drawing-retract {
  from { transform: translate(-50%, var(--spider-drop-distance)); }
  to { transform: translate(-50%, var(--spider-y, 86px)); }
}

@keyframes backup-drawing-silk-drop {
  from { height: var(--spider-silk-length, 110px); }
  to { height: var(--spider-silk-drop-length, 244px); }
}

@keyframes backup-drawing-silk-retract {
  from { height: var(--spider-silk-drop-length, 244px); }
  to { height: var(--spider-silk-length, 110px); }
}

.backup-drawing__spider svg .backup-drawing__leg-group {
  animation: none !important;
}

.backup-drawing__guide {
  position: absolute;
  z-index: 3;
  top: calc(194px * var(--spider-scale, 1));
  left: 50%;
  width: calc(140px * var(--spider-scale, 1));
  transform: translateX(-50%);
  pointer-events: none;
  white-space: normal;
  text-align: center;
  font-size: calc(13px * var(--spider-scale, 1));
  line-height: 1;
  font-weight: 400;
  letter-spacing: .01em;
  color: #fff;
  text-shadow: 0 1px 2px rgba(0, 0, 0, .28);
  opacity: 1;
  transition: opacity 120ms ease-out;
}

.backup-drawing__guide-title,
.backup-drawing__guide-subtitle {
  display: block;
  font-size: 12px;
  padding-bottom: 10px;
}

/* .backup-drawing__guide-title {
  font-size: calc(12px * var(--spider-scale, 1));
}

.backup-drawing__guide:not(.is-backup) .backup-drawing__guide-title,
.backup-drawing__guide:not(.is-backup) .backup-drawing__guide-subtitle {
  font-size: calc(8px * var(--spider-scale, 1));
} */

.backup-drawing__guide.is-backup .backup-drawing__guide-subtitle {
  display: none;
}

.backup-drawing__guide.is-hidden { opacity: 0; }
.backup-drawing__guide.is-showing { transition: opacity 150ms ease-in-out; }

.backup-drawing__text {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

[data-resource-image-pair] { position: relative; }

[data-resource-image-pair] [data-resource-image-role="primary"],
[data-resource-image-pair] [data-resource-image-role="backup"] {
  display: block !important;
  transition: opacity 550ms ease;
}

[data-resource-image-pair] [data-resource-image-role="backup"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  pointer-events: none;
}

html[data-resource-image-mode="backup"] [data-resource-image-has-backup="true"] [data-resource-image-role="primary"] {
  opacity: 0;
  pointer-events: none;
}

html[data-resource-image-mode="backup"] [data-resource-image-has-backup="true"] [data-resource-image-role="backup"] {
  opacity: 1;
  pointer-events: auto;
}

@media (max-width: 959px) {
  backup-drawing-toggle {
    right: 0;
  }
}

/* 桌面端始终把蜘蛛挂在 1800px 站点内容容器的右边缘。 */
@media (min-width: 960px) {
  backup-drawing-toggle {
    right: max(45px, calc((100vw - 1800px) / 2)) !important;
  }
}

@media (min-width: 1920px) {
  backup-drawing-toggle {
    right: max(0px, calc((100vw - 1800px) / 2)) !important;
  }
}

@media (max-width: 767px) {
  backup-drawing-toggle {
    transition: none;
  }

  .backup-drawing__silk {
    background: #fff;
  }

  html[data-resource-image-mode="backup"] .backup-drawing__silk {
    background: #fff;
  }
}

@media (prefers-reduced-motion: reduce) {
  .backup-drawing__sway,
  .backup-drawing__silk,
  .backup-drawing__spider,
  .backup-drawing__spider svg,
  [data-resource-image-pair] [data-resource-image-role="primary"],
  [data-resource-image-pair] [data-resource-image-role="backup"] {
    animation: none !important;
    transition: none !important;
  }
}