:root {
  --primary: #0A3D90;
  --primary-dark: #003F8F;
  --primary-deep: #06286a;
  --secondary: #1F6EAF;
  --light-blue: #8ABAD5;
  --light-blue-soft: #AFCBE5;
  --bg-white: #FFFFFF;
  --bg-gray: #F5F7FA;
  --text: #141E33;
  --text-dim: rgba(20, 30, 51, 0.65);
  --accent-red: #C30123;
  --primary-fade: rgba(10, 61, 144, 0.92);
  --primary-overlay: rgba(6, 40, 106, 0.78);
  --panel-left-w: clamp(220px, 24vw, 380px);
  --panel-right-w: 180px;
  --top-h: 60px;
}

* { box-sizing: border-box; }
html, body {
  margin: 0; padding: 0;
  height: 100%; width: 100%;
  background: #000;
  color: var(--text);
  font-family: 'MiSans', 'MiSans VF', 'HarmonyOS Sans SC', 'PingFang SC',
               'Microsoft YaHei', '微软雅黑', system-ui, -apple-system,
               BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  overflow: hidden;
}

#app {
  position: relative;
  width: 100vw; height: 100vh;
  overflow: hidden;
}

.top-bar {
  position: absolute; top: 0; left: 0; right: 0;
  height: var(--top-h);
  background: #fff;
  display: flex; align-items: center;
  padding: 0 24px;
  z-index: 9500;
  border-bottom: 1px solid #e1e6ee;
}
.top-bar .site-brand {
  display: flex; align-items: center; gap: 12px;
  color: var(--text); font-weight: 600; font-size: 16px;
  letter-spacing: 0.5px;
}
.top-bar .site-brand img { height: 36px; max-width: 220px; object-fit: contain; }
.top-bar .site-brand #brandName { color: var(--text); font-weight: 600; font-size: 16px; }
.top-bar .lang-switch {
  margin-left: auto;
  display: flex;
  border: 1px solid #d0d6e0;
  border-radius: 3px;
  overflow: hidden;
}
.top-bar .lang-switch a {
  padding: 7px 16px;
  font-size: 13px;
  color: var(--text-dim);
  background: #fff;
  text-decoration: none;
  border-right: 1px solid #d0d6e0;
  transition: background 0.15s, color 0.15s;
}
.top-bar .lang-switch a:last-child { border-right: none; }
.top-bar .lang-switch a:hover { color: var(--primary); }
.top-bar .lang-switch a.active {
  background: var(--primary); color: #fff;
}

.vr-stage {
  position: absolute;
  top: var(--top-h); left: 0; right: 0; bottom: 0;
  background: #000;
  overflow: hidden;
}
.vr-stage canvas { display: block; }
#vrContainer.scene-empty {
  background: linear-gradient(180deg, #1a2540 0%, #0b1426 100%);
}
#vrContainer.scene-empty::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 30% 30%, rgba(138, 186, 213, 0.06) 0%, transparent 50%),
    radial-gradient(circle at 70% 70%, rgba(31, 110, 175, 0.08) 0%, transparent 50%);
  pointer-events: none;
}

.left-panel {
  position: absolute;
  top: var(--top-h); left: 0; bottom: 0;
  width: var(--panel-left-w);
  background: linear-gradient(180deg,
              rgba(10, 61, 144, 0.40) 0%,
              rgba(6, 40, 106, 0.58) 100%);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
  display: flex; flex-direction: column;
  z-index: 20;
  transition: transform 0.3s ease;
}
.left-panel .logo-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(16px, 2vw, 30px) clamp(16px, 2vw, 30px) 0;
  flex-shrink: 0;
}
.left-panel .logo-wrap img {
  max-width: 100%;
  max-height: clamp(38px, 4vw, 62px);
  width: auto;
  object-fit: contain;
}
.left-panel .logo-wrap .brand-fallback {
  color: #fff;
  font-size: 16px;
  font-weight: 400;
  letter-spacing: 1.2px;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
}
.left-panel .category-list {
  flex: 1;
  overflow-y: auto;
  padding: clamp(20px, 2.7vw, 41px) 0 40px;
}
.cat-item {
  display: block;
  cursor: pointer;
  position: relative;
  margin: 0 clamp(16px, 2.5vw, 38px);
  transition: background 0.18s;
}
.cat-item::after {
  content: '';
  position: absolute;
  bottom: 0; left: 8px; right: 8px;
  height: 1px;
  background: rgba(255, 255, 255, 0.18);
}
.cat-item:last-child::after {
  display: none;
}
.cat-item .cat-label {
  display: block;
  padding: clamp(16px, 1.8vw, 26px) clamp(14px, 1.8vw, 28px);
  text-align: left;
  color: rgba(255, 255, 255, 0.92);
  font-size: clamp(13px, 1.15vw, 17px);
  font-weight: 400;
  letter-spacing: 0.2px;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.45);
}
.cat-item:hover {
  background: rgba(100, 165, 220, 0.26);
}
.cat-item.active,
.cat-item.active:hover {
  background: rgba(45, 50, 65, 0.62);
}

.right-panel {
  position: absolute;
  top: 50%; right: 18px;
  transform: translateY(-50%);
  width: var(--panel-right-w);
  max-height: 480px;
  background: linear-gradient(180deg,
              rgba(60, 70, 85, 0.38) 0%,
              rgba(35, 45, 60, 0.60) 100%);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 20;
  transition: right 0.3s ease, opacity 0.3s ease;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 14px 0;
  border-radius: 4px;
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.35);
  scrollbar-width: thin;
  scrollbar-color: rgba(255, 255, 255, 0.25) transparent;
}
.right-panel::-webkit-scrollbar { width: 6px; }
.right-panel::-webkit-scrollbar-track { background: transparent; }
.right-panel::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.25);
  border-radius: 3px;
}
.right-panel .thumb-item {
  display: block;
  width: 140px;
  margin: 0 auto 14px;
  cursor: pointer;
  border-radius: 3px;
  overflow: hidden;
  position: relative;
  border: 2px solid transparent;
  transition: border-color 0.15s, transform 0.15s;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.35);
}
.right-panel .thumb-item:hover {
  border-color: rgba(255, 255, 255, 0.7);
  transform: translateY(-1px);
}
.right-panel .thumb-item.active {
  border-color: #fff;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(255, 255, 255, 0.4);
}
.right-panel .thumb-item.active .thumb-title {
  color: #f5d24a;
  font-weight: 600;
}
.right-panel .thumb-img {
  width: 100%;
  height: 80px;
  background-color: rgba(0, 0, 0, 0.4);
  background-size: cover;
  background-position: center;
  display: block;
}
.right-panel .thumb-title {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: 4px 8px;
  font-size: 11px;
  color: #fff;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0) 0%, rgba(0, 0, 0, 0.78) 100%);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  letter-spacing: 0.3px;
}
.right-panel.empty { display: none; }

body.left-collapsed .left-panel { transform: translateX(-100%); }
body.right-collapsed .right-panel {
  right: calc(-1 * var(--panel-right-w) - 24px);
  opacity: 0;
  pointer-events: none;
}

.panel-toggle {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px; height: 48px;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.78);
  color: #fff;
  border: none;
  cursor: pointer;
  z-index: 22;
  font-size: 24px;
  font-family: inherit;
  line-height: 1;
  display: flex; align-items: center; justify-content: center;
  transition: left 0.3s ease, right 0.3s ease, background 0.15s;
  padding: 0;
  box-shadow: 0 3px 12px rgba(0, 0, 0, 0.5);
}
.panel-toggle:hover { background: rgba(0, 0, 0, 0.92); }

.left-toggle {
  left: calc(var(--panel-left-w) - 24px);
}
body.left-collapsed .left-toggle {
  left: 16px;
}

.right-toggle {
  right: calc(var(--panel-right-w) + 24px);
}
body.right-collapsed .right-toggle {
  right: 16px;
}
body.right-empty .right-panel { display: none; }
body.right-empty .right-toggle {
  right: 16px;
}

.vr-title-bar {
  position: absolute; top: 28px; left: 50%; transform: translateX(-50%);
  z-index: 6;
  display: flex;
  align-items: center;
  gap: 80px;
  pointer-events: auto;
}
.vr-title-bar .title-text {
  background: rgba(10, 61, 144, 0.45);
  color: #fff;
  padding: 16px 80px;
  min-width: 320px;
  text-align: center;
  border-radius: 4px;
  font-size: 17px;
  font-weight: 400;
  letter-spacing: 0.3px;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
}
.vr-title-bar .title-nav {
  width: 36px; height: 36px;
  border: 1.5px solid rgba(255, 255, 255, 0.85);
  border-radius: 4px;
  background: rgba(0, 0, 0, 0.18);
  color: rgba(255, 255, 255, 0.95);
  font-size: 14px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
  transition: background 0.15s;
  font-family: inherit;
  padding: 0;
}
.vr-title-bar .title-nav:hover {
  background: rgba(0, 0, 0, 0.4);
}

.vr-menu {
  position: absolute;
  top: 28px; right: 24px;
  z-index: 7;
}
.vr-menu-btn {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.78);
  color: #2a2f3a;
  border: none;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  padding: 0;
  transition: background 0.15s, transform 0.15s;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.22);
}
.vr-menu-btn:hover { background: rgba(255, 255, 255, 0.95); }
.vr-menu.expanded .vr-menu-btn { display: none; }

.vr-tools-col {
  display: none;
  flex-direction: column;
  gap: 16px;
  align-items: flex-end;
}
.vr-menu.expanded .vr-tools-col { display: flex; }

.vr-tool-btn {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.78);
  color: #2a2f3a;
  border: none;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  padding: 0;
  transition: background 0.15s;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.22);
}
.vr-tool-btn:hover { background: rgba(255, 255, 255, 0.95); }
.vr-tool-icon { display: block; }

.play-overlay { display: none !important; }

.vr-play-anchor {
  position: absolute;
  left: 0; top: 0;
  background: none; border: none;
  cursor: pointer;
  z-index: 5;
  padding: 0;
  pointer-events: auto;
}
.vr-play-circle {
  display: flex; align-items: center; justify-content: center;
  width: 88px; height: 88px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 0 0 6px rgba(138, 186, 213, 0.32),
              0 0 0 14px rgba(138, 186, 213, 0.14);
  position: relative;
  transition: transform 0.2s, box-shadow 0.2s;
}
.vr-play-anchor:hover .vr-play-circle { transform: scale(1.08); }
.vr-icon {
  position: absolute;
  display: block;
}
.vr-icon-play { color: var(--primary); margin-left: 4px; }
.vr-icon-stop { color: var(--accent-red); display: none; }
.vr-play-anchor.playing .vr-icon-play { display: none; }
.vr-play-anchor.playing .vr-icon-stop { display: block; }
.vr-play-anchor.playing .vr-play-circle {
  box-shadow: 0 0 0 6px rgba(195, 1, 35, 0.32),
              0 0 0 14px rgba(195, 1, 35, 0.14);
}

.scene-description {
  position: absolute; left: 50%; bottom: 48px;
  transform: translateX(-50%);
  background: rgba(255, 255, 255, 0.92);
  color: var(--text);
  padding: 32px 80px;
  max-width: 60%;
  min-width: 480px;
  font-size: 17px; line-height: 1.75;
  text-align: center;
  border: none;
  border-radius: 3px;
  z-index: 6;
  font-weight: 500;
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.18);
}
.scene-description .close {
  position: absolute; top: 12px; right: 16px;
  cursor: pointer; color: #999;
  font-size: 22px;
  background: rgba(0, 0, 0, 0.06);
  border: none;
  width: 26px; height: 26px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  padding: 0; line-height: 1;
}
.scene-description .close:hover { background: rgba(0, 0, 0, 0.12); color: #555; }

.vr-hotspot-layer {
  position: absolute; inset: 0;
  pointer-events: none;
  z-index: 5;
}
.vr-hotspot {
  position: absolute;
  left: 0; top: 0;
  pointer-events: auto;
  background: none; border: none;
  cursor: pointer;
  color: #fff;
  display: flex; flex-direction: column; align-items: center;
  padding: 0;
}
.vr-hotspot-dot {
  width: calc(36px * var(--hs-size, 1)); height: calc(36px * var(--hs-size, 1));
  border-radius: 50%;
  background: var(--primary);
  box-shadow:
    0 0 0 4px rgba(255, 255, 255, 0.85),
    0 0 0 10px rgba(195, 1, 35, 0.28);
  position: relative;
  animation: hotspotPulse 2.2s infinite;
}
.vr-hotspot-dot::after {
  content: 'i';
  position: absolute; inset: 0;
  font-family: 'Times New Roman', serif;
  font-style: italic; font-weight: bold;
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: calc(20px * var(--hs-size, 1));
}
.vr-hotspot-dot.video {
  background: rgba(0, 0, 0, 0.6);
  width: calc(56px * var(--hs-size, 1)); height: calc(56px * var(--hs-size, 1));
  animation: hotspotPulse 2.2s infinite;
}
.vr-hotspot-dot.video::after {
  content: '▶';
  font-family: 'Segoe UI Symbol', 'Apple Color Emoji', sans-serif;
  font-style: normal;
  font-weight: normal;
  font-size: 22px;
  margin-left: 3px;
}
.vr-hotspot-nav-dot {
  background: rgba(31, 110, 175, 0.92);
  font-family: 'Segoe UI', sans-serif;
  font-style: normal;
  font-weight: bold;
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px;
}
.vr-hotspot-nav-dot::after { content: none !important; }
.vr-hotspot-label {
  margin-top: 8px;
  background: rgba(10, 61, 144, 0.85);
  color: #fff;
  font-size: 12px;
  padding: 3px 10px;
  border-radius: 2px;
  max-width: 180px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  letter-spacing: 0.5px;
}
@keyframes hotspotPulse {
  0%   { box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.85), 0 0 0 10px rgba(195, 1, 35, 0.28); }
  50%  { box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.85), 0 0 0 20px rgba(195, 1, 35, 0.08); }
  100% { box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.85), 0 0 0 10px rgba(195, 1, 35, 0.28); }
}

.popup-mask {
  position: fixed; inset: 0;
  background: rgba(6, 40, 106, 0.6);
  display: none;
  align-items: center; justify-content: center;
  z-index: 100;
  padding: 20px;
}
.popup-mask.show { display: flex; }
.popup-card {
  background: #fff;
  color: var(--text);
  width: 100%; max-width: calc(580px * var(--popup-size, 1));
  max-height: 86vh;
  border-radius: 4px;
  overflow: hidden;
  display: flex; flex-direction: column;
  box-shadow: 0 12px 40px rgba(6, 40, 106, 0.5);
  border-top: 3px solid var(--primary);
}
.popup-card .popup-head {
  padding: 16px 22px;
  background: var(--bg-gray);
  color: var(--text);
  font-weight: 600; font-size: 16px;
  display: flex; align-items: center;
  border-bottom: 1px solid #e1e6ee;
}
.popup-card .popup-head .popup-close {
  margin-left: auto;
  background: none; border: none;
  color: var(--text-dim); font-size: 22px; cursor: pointer;
  line-height: 1;
}
.popup-card .popup-head .popup-close:hover { color: var(--accent-red); }
.popup-card .popup-body {
  padding: 20px 22px;
  overflow: auto;
  font-size: 14px; line-height: 1.75;
  color: var(--text);
}
.popup-card .popup-body img,
.popup-card .popup-body video {
  width: 100%; height: auto; border-radius: 2px; margin: 8px 0;
}
.popup-card .popup-body a {
  display: inline-block;
  margin-top: 12px;
  color: #fff;
  background: var(--primary);
  text-decoration: none;
  padding: 7px 18px;
  border-radius: 2px;
  font-size: 13px;
  letter-spacing: 0.5px;
  transition: background 0.15s;
}
.popup-card .popup-body a:hover { background: var(--secondary); }

.inline-video {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: min(720px, 70vw);
  z-index: 90;
  background: #000;
  border-radius: 4px;
  overflow: hidden;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.65);
}
.inline-video[hidden] { display: none !important; }
.inline-video video {
  width: 100%;
  display: block;
  background: #000;
}
.inline-video-close {
  position: absolute;
  top: 8px; right: 8px;
  width: 34px; height: 34px;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.65);
  color: #fff;
  border: none;
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
  z-index: 2;
  display: flex; align-items: center; justify-content: center;
  transition: background 0.15s;
}
.inline-video-close:hover { background: rgba(195, 1, 35, 0.85); }

.mobile-menu-toggle {
  display: none;
  position: absolute;
  top: calc(var(--top-h) + 10px);
  left: 10px;
  width: 36px; height: 36px;
  background: rgba(10, 61, 144, 0.85);
  color: #fff;
  border: none; border-radius: 3px;
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
  z-index: 25;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

@media (max-width: 1024px) and (min-width: 769px) {
  :root {
    --panel-left-w: 280px;
    --top-h: 56px;
  }
  .left-panel .logo-wrap img { max-height: 60px; }
  .cat-item .cat-label { font-size: 16px; padding: 22px 20px; }
  .vr-title-bar .title-text { font-size: 15px; padding: 12px 50px; min-width: 220px; }
  .scene-description { font-size: 14px; padding: 18px 40px; max-width: 70%; }
}

@media (max-width: 768px) {
  :root {
    --panel-left-w: 78%;
    --panel-right-w: 64%;
    --top-h: 50px;
  }

  .top-bar { padding: 0 12px; }
  .top-bar .site-brand img { height: 26px; max-width: 130px; object-fit: contain; }
  .top-bar .lang-switch a {
    padding: 4px 10px;
    font-size: 12px;
  }

  .left-panel {
    max-width: 280px;
    transform: translateX(-100%);
    box-shadow: 0 0 24px rgba(0, 0, 0, 0.4);
  }
  body:not(.left-collapsed) .left-panel { transform: translateX(0); }
  body.left-collapsed .left-panel { transform: translateX(-100%); }

  .left-panel .logo-wrap {
    padding: 18px 16px 0;
  }
  .left-panel .logo-wrap img {
    max-height: 48px;
  }
  .left-panel .category-list {
    padding: 12px 0 24px;
  }
  .cat-item {
    margin: 0 14px;
  }
  .cat-item .cat-label {
    padding: 14px 14px;
    font-size: 14px;
    letter-spacing: 0.2px;
  }

  .right-panel { display: none; }
  .left-toggle, .right-toggle { display: none; }
  .mobile-menu-toggle {
    display: block;
    top: calc(var(--top-h) + 8px);
    left: 8px;
  }

  .vr-title-bar {
    top: 10px;
    gap: 14px;
  }
  .vr-title-bar .title-text {
    font-size: 13px;
    padding: 8px 18px;
    min-width: 0;
    max-width: 60vw;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  .vr-title-bar .title-nav {
    width: 28px; height: 28px;
    font-size: 13px;
  }

  .vr-menu {
    top: 12px;
    right: 10px;
  }
  .vr-menu-btn, .vr-tool-btn {
    width: 34px; height: 34px;
  }
  .vr-tools-col {
    gap: 10px;
  }

  .scene-description {
    max-width: 92%;
    min-width: 0;
    font-size: 12px;
    padding: 10px 32px 10px 14px;
    bottom: 14px;
    line-height: 1.5;
  }
  .scene-description .desc-close {
    width: 22px; height: 22px;
    top: 6px; right: 6px;
  }

  .play-overlay .play-circle {
    width: 64px; height: 64px;
  }
  .play-overlay .play-circle::after {
    border-left-width: 16px;
    border-top-width: 10px;
    border-bottom-width: 10px;
  }

  .vr-hotspot-dot { width: 28px; height: 28px; }
  .vr-hotspot-dot::after { font-size: 15px; }
  .vr-hotspot-label {
    font-size: 11px;
    padding: 2px 8px;
    max-width: 140px;
  }
  .vr-play-anchor .vr-play-circle,
  .vr-hotspot-video .vr-play-circle {
    width: 56px; height: 56px;
  }
  .vr-play-anchor .vr-icon,
  .vr-hotspot-video .vr-icon {
    width: 26px;
    height: 26px;
  }

  .popup-body {
    width: 92vw;
    max-width: none;
    padding: 18px;
  }
  .popup-body img {
    max-height: 50vh;
  }
}

@media (max-width: 480px) {
  :root {
    --top-h: 46px;
  }
  .top-bar .site-brand img { height: 22px; max-width: 100px; }
  .top-bar .lang-switch a { padding: 3px 8px; font-size: 11px; }

  .left-panel { max-width: 240px; }
  .left-panel .logo-wrap img { max-height: 42px; }
  .cat-item .cat-label { font-size: 13px; padding: 12px 12px; }

  .vr-title-bar .title-text {
    font-size: 12px;
    padding: 6px 14px;
    max-width: 55vw;
  }
  .vr-title-bar .title-nav { width: 24px; height: 24px; }
  .vr-title-bar { gap: 8px; top: 8px; }

  .scene-description { font-size: 11px; padding: 8px 28px 8px 12px; }
}

.intro-overlay {
  position: fixed;
  top: var(--top-h, 60px);
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 9000;
  background: #000;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.intro-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  background: #000;
  display: block;
}
.intro-skip {
  position: absolute;
  right: 28px;
  bottom: 28px;
  padding: 10px 28px;
  font-size: 15px;
  color: #fff;
  background: rgba(0, 0, 0, 0.45);
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: 24px;
  cursor: pointer;
  transition: background 0.18s, transform 0.18s;
  z-index: 1;
}
.intro-skip:hover {
  background: rgba(0, 0, 0, 0.7);
  transform: scale(1.04);
}