/**
 * 课程播放器 — 对齐 seo-frontend CoursePlayerChrome（自绘底栏）
 */
body.zk-shell .zk-player-wrap {
  position: relative;
  width: 850px;
  max-width: 100%;
  background: #000;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 12px 32px rgba(15, 23, 42, 0.18);
}
body.zk-shell .zk-player-wrap #player-con,
body.zk-shell .zk-player-wrap .prism-player {
  width: 100% !important;
  height: 548px !important;
  background: #000 !important;
  border-radius: 0 !important;
}
body.zk-shell .zk-player-wrap #player-con video {
  object-fit: contain !important;
  object-position: center center;
  width: 100% !important;
  height: 100% !important;
  background: #000;
}

body.zk-shell .zk-player-toast {
  position: absolute;
  left: 50%;
  bottom: 72px;
  z-index: 35;
  transform: translateX(-50%);
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.78);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.2s ease;
  white-space: nowrap;
}
body.zk-shell .zk-player-toast.is-on {
  opacity: 1;
}


/* 彻底隐藏 Aliplayer 内置控制条 */
body.zk-shell .zk-player-wrap .prism-controlbar,
body.zk-shell .zk-player-wrap .prism-progress,
body.zk-shell .zk-player-wrap .prism-time-display,
body.zk-shell .zk-player-wrap .prism-play-btn,
body.zk-shell .zk-player-wrap .prism-fullscreen-btn,
body.zk-shell .zk-player-wrap .prism-volume,
body.zk-shell .zk-player-wrap .prism-volume-btn,
body.zk-shell .zk-player-wrap .prism-snapshot-btn,
body.zk-shell .zk-player-wrap .prism-cc-btn,
body.zk-shell .zk-player-wrap .prism-setting-btn,
body.zk-shell .zk-player-wrap .prism-stream-selector,
body.zk-shell .zk-player-wrap .prism-speed-selector,
body.zk-shell .zk-player-wrap .prism-info-display,
body.zk-shell .zk-player-wrap .prism-tooltip,
body.zk-shell .zk-player-wrap .prism-thumbnail,
body.zk-shell .zk-player-wrap .prism-animation {
  display: none !important;
  visibility: hidden !important;
  pointer-events: none !important;
}
body.zk-shell .zk-player-wrap .prism-big-play-btn {
  z-index: 12;
}

/* —— YouTube 风自绘底栏（仅贴底，绝不盖住画面点击） —— */
body.zk-shell .zk-player-chrome {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 20;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.2s ease;
}
body.zk-shell .zk-player-chrome.is-pinned {
  opacity: 1;
}
body.zk-shell .zk-player-chrome__shade {
  background: linear-gradient(to top, rgba(0, 0, 0, 0.85), rgba(0, 0, 0, 0.45) 55%, transparent);
  padding: 40px 16px 12px;
  pointer-events: auto;
}
body.zk-shell .zk-player-chrome__progress {
  position: relative;
  height: 8px;
  margin-bottom: 10px;
  cursor: pointer;
  touch-action: none;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.25);
  transition: height 0.12s ease;
  /* 扩大可点热区 */
  box-shadow: 0 0 0 8px transparent;
}
body.zk-shell .zk-player-chrome__progress.is-fat,
body.zk-shell .zk-player-chrome__progress:hover {
  height: 12px;
}
body.zk-shell .zk-player-chrome__buf {
  position: absolute;
  inset: 0 auto 0 0;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.35);
}
body.zk-shell .zk-player-chrome__played {
  position: absolute;
  inset: 0 auto 0 0;
  z-index: 1;
  border-radius: 999px;
  background: #f0c14a;
}
body.zk-shell .zk-player-chrome__knob {
  position: absolute;
  top: 50%;
  z-index: 2;
  width: 14px;
  height: 14px;
  margin-left: -7px;
  border: 2px solid #f0c14a;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.35);
  transform: translateY(-50%);
  opacity: 0.85;
  transition: opacity 0.12s ease;
  pointer-events: none;
}
body.zk-shell .zk-player-chrome__progress.is-fat .zk-player-chrome__knob,
body.zk-shell .zk-player-chrome__progress:hover .zk-player-chrome__knob {
  opacity: 1;
}
body.zk-shell .zk-player-chrome__hover-tip {
  position: absolute;
  bottom: calc(100% + 10px);
  z-index: 3;
  padding: 4px 8px;
  border-radius: 6px;
  background: rgba(0, 0, 0, 0.9);
  color: #fff;
  font-size: 11px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-weight: 600;
  white-space: nowrap;
  transform: translateX(-50%);
  pointer-events: none;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.35);
  display: none;
}
body.zk-shell .zk-player-chrome__progress.is-fat .zk-player-chrome__hover-tip {
  display: block;
}

body.zk-shell .zk-player-chrome__row {
  display: flex;
  align-items: center;
  gap: 2px;
  color: #fff;
}
body.zk-shell .zk-player-chrome__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 36px;
  min-width: 36px;
  padding: 0 8px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: rgba(255, 255, 255, 0.95);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  line-height: 1;
}
body.zk-shell .zk-player-chrome__btn:hover {
  background: rgba(255, 255, 255, 0.15);
}
body.zk-shell .zk-player-chrome__btn:disabled {
  opacity: 0.35;
  cursor: default;
}
body.zk-shell .zk-player-chrome__btn svg {
  width: 20px;
  height: 20px;
  display: block;
  fill: currentColor;
  color: inherit;
}
body.zk-shell .zk-player-chrome__btn svg[fill="none"] {
  fill: none;
}
body.zk-shell .zk-player-chrome__btn.is-on {
  color: #f0c14a;
}
body.zk-shell .zk-player-chrome__time {
  margin-left: 4px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  color: rgba(255, 255, 255, 0.9);
  user-select: none;
  white-space: nowrap;
}
body.zk-shell .zk-player-chrome__time span {
  color: rgba(255, 255, 255, 0.45);
}
body.zk-shell .zk-player-chrome__right {
  position: relative;
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 2px;
}
body.zk-shell .zk-player-chrome__menu {
  position: absolute;
  bottom: calc(100% + 8px);
  right: 0;
  z-index: 30;
  min-width: 7.5rem;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.92);
  padding: 4px 0;
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(8px);
  display: none;
}
body.zk-shell .zk-player-chrome__menu.is-open {
  display: block;
}
body.zk-shell .zk-player-chrome__menu-title {
  padding: 6px 12px;
  font-size: 11px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.5);
}
body.zk-shell .zk-player-chrome__menu button {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  border: 0;
  background: transparent;
  color: rgba(255, 255, 255, 0.9);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  text-align: left;
}
body.zk-shell .zk-player-chrome__menu button:hover {
  background: rgba(255, 255, 255, 0.1);
}
body.zk-shell .zk-player-chrome__menu button.is-active {
  color: #f0c14a;
}
body.zk-shell .zk-player-chrome__vol-pop {
  position: absolute;
  bottom: calc(100% + 6px);
  left: 50%;
  z-index: 30;
  display: none;
  width: 40px;
  height: 120px;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.92);
  transform: translateX(-50%);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.45);
}
body.zk-shell .zk-player-chrome__vol-wrap.is-open .zk-player-chrome__vol-pop {
  display: flex;
}
body.zk-shell .zk-player-chrome__vol-pop input[type="range"] {
  width: 96px;
  height: 6px;
  transform: rotate(-90deg);
  cursor: pointer;
  accent-color: #f0c14a;
}
body.zk-shell .zk-player-chrome__buffering {
  position: absolute;
  inset: 0;
  z-index: 15;
  display: none;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}
body.zk-shell .zk-player-chrome__buffering.is-on {
  display: flex;
}
body.zk-shell .zk-player-chrome__buffering span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.55);
  color: rgba(255, 255, 255, 0.9);
  font-size: 12px;
  font-weight: 500;
  backdrop-filter: blur(4px);
}
body.zk-shell .zk-player-chrome__spin {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.25);
  border-top-color: #f0c14a;
  border-radius: 50%;
  animation: zk-player-spin 0.8s linear infinite;
}
@keyframes zk-player-spin {
  to { transform: rotate(360deg); }
}

/* YouTube 列表侧栏布局 */
body.zk-shell .kc_top .kc_jz .kc_sp {
  display: flex !important;
  align-items: stretch !important;
  gap: 0 !important;
  height: auto !important;
  min-height: 548px;
  background: #0f0f0f !important;
  border: 1px solid rgba(255, 255, 255, 0.08);
}
body.zk-shell .zk-catalog-side {
  position: relative !important;
  right: auto !important;
  flex: 0 0 350px;
  width: 350px;
  max-width: 350px;
  height: 548px;
  z-index: 40;
  overflow: hidden;
}
body.zk-shell .zk-catalog-side #catalog.kc_ml {
  width: 100% !important;
  height: 100% !important;
  max-height: 548px;
  overflow-y: auto !important;
  box-sizing: border-box;
}
body.zk-shell .zk-player-wrap {
  flex: 1 1 auto;
  width: auto !important;
  max-width: none;
  min-width: 0;
}
body.zk-shell #catalog.kc_ml li a[vid] button {
  pointer-events: none !important;
}
body.zk-shell .kc_top .kc_jz .kc_sp .kc_ml,
body.zk-shell #catalog.kc_ml {
  background: #0f0f0f !important;
  padding: 0 !important;
  color: #f1f1f1 !important;
  scrollbar-width: thin;
  scrollbar-color: #717171 transparent;
}
body.zk-shell #catalog.kc_ml::-webkit-scrollbar {
  width: 8px;
}
body.zk-shell #catalog.kc_ml::-webkit-scrollbar-thumb {
  background: #717171;
  border-radius: 8px;
}
body.zk-shell #catalog.kc_ml h2,
body.zk-shell #catalog.kc_ml h2.zhang001 {
  background: transparent !important;
  background-image: none !important;
  color: #aaa !important;
  border: 0 !important;
  border-radius: 0 !important;
  box-shadow: none !important;
  width: 100% !important;
  height: auto !important;
  min-height: 0 !important;
  margin: 0 !important;
  padding: 10px 14px 6px !important;
  line-height: 1.3 !important;
  display: flex !important;
  align-items: center;
  gap: 8px;
  font-size: 12px !important;
  font-weight: 600 !important;
  letter-spacing: 0.02em;
  text-transform: none;
  cursor: pointer;
}
body.zk-shell #catalog.kc_ml h2:hover,
body.zk-shell #catalog.kc_ml h2.zhang001:hover {
  background: rgba(255, 255, 255, 0.05) !important;
  color: #fff !important;
}
body.zk-shell #catalog.kc_ml h2.is-on,
body.zk-shell #catalog.kc_ml h2.zhang001.is-on {
  color: #fff !important;
  background: transparent !important;
  box-shadow: none !important;
}
body.zk-shell #catalog.kc_ml h2 img {
  display: none !important;
}
body.zk-shell #catalog.kc_ml h2::before {
  content: "";
  width: 0;
  height: 0;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 6px solid #aaa;
  margin-right: 2px;
  flex-shrink: 0;
  transform: none;
  border-bottom: 0;
  border-right-color: transparent;
}
body.zk-shell #catalog.kc_ml h2.is-collapsed::before {
  border-top: 5px solid transparent;
  border-bottom: 5px solid transparent;
  border-left: 6px solid #aaa;
  border-right: 0;
}
body.zk-shell #catalog.kc_ml h2 span {
  float: none !important;
  width: auto !important;
  flex: 1;
  min-width: 0;
  color: inherit !important;
  font-size: 12px !important;
  font-weight: 600 !important;
  line-height: 1.35 !important;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  display: block !important;
  -webkit-line-clamp: unset;
}
body.zk-shell #catalog.kc_ml h2 .gm {
  float: none !important;
  margin: 0 0 0 auto !important;
  height: 22px !important;
  line-height: 22px !important;
  padding: 0 8px !important;
  font-size: 11px !important;
}
body.zk-shell #catalog.kc_ml ul.jie001 {
  margin: 0 0 4px !important;
  padding: 0 !important;
  list-style: none !important;
}
body.zk-shell #catalog.kc_ml li {
  width: 100% !important;
  margin: 0 !important;
  padding: 0 !important;
  list-style: none !important;
  float: none !important;
  clear: both !important;
  height: auto !important;
}
body.zk-shell #catalog.kc_ml li a {
  display: flex !important;
  align-items: flex-start !important;
  gap: 12px !important;
  width: 100% !important;
  margin: 0 !important;
  padding: 10px 12px !important;
  border-radius: 0 !important;
  color: #f1f1f1 !important;
  text-decoration: none !important;
  box-sizing: border-box;
  transition: background 0.12s ease;
  float: none !important;
  height: auto !important;
  overflow: visible !important;
}
body.zk-shell #catalog.kc_ml li a:hover {
  background: rgba(255, 255, 255, 0.1) !important;
  color: #fff !important;
}
body.zk-shell #catalog.kc_ml li a.is-playing,
body.zk-shell #catalog.kc_ml li a:has(.zk-cata-dot.is-on) {
  background: rgba(255, 255, 255, 0.1) !important;
  color: #fff !important;
}
body.zk-shell #catalog.kc_ml li .zk-pl-idx,
body.zk-shell #catalog.kc_ml li a > span.zk-pl-idx {
  flex: 0 0 24px !important;
  width: 24px !important;
  height: auto !important;
  min-height: 0 !important;
  margin: 1px 0 0 !important;
  padding: 0 !important;
  background: transparent !important;
  border-radius: 0 !important;
  color: #aaa !important;
  font-size: 12px !important;
  font-weight: 500 !important;
  line-height: 1.4 !important;
  text-align: center !important;
  float: none !important;
  display: inline-flex !important;
  align-items: center;
  justify-content: center;
}
body.zk-shell #catalog.kc_ml li a.is-playing .zk-pl-idx,
body.zk-shell #catalog.kc_ml li a:has(.zk-cata-dot.is-on) .zk-pl-idx {
  color: #3ea6ff !important;
  font-size: 0 !important;
}
body.zk-shell #catalog.kc_ml li a.is-playing .zk-pl-idx::before,
body.zk-shell #catalog.kc_ml li a:has(.zk-cata-dot.is-on) .zk-pl-idx::before {
  content: "";
  display: block;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 5px 0 5px 8px;
  border-color: transparent transparent transparent #3ea6ff;
  background: none;
  clip-path: none;
}
body.zk-shell #catalog.kc_ml li .zk-pl-body {
  flex: 1 1 auto !important;
  min-width: 0 !important;
  display: flex !important;
  flex-direction: column !important;
  gap: 4px !important;
  float: none !important;
  width: auto !important;
  height: auto !important;
}
body.zk-shell #catalog.kc_ml li .zk-pl-title,
body.zk-shell #catalog.kc_ml li p.zk-pl-title {
  margin: 0 !important;
  padding: 0 !important;
  width: auto !important;
  max-width: 100% !important;
  height: auto !important;
  max-height: none !important;
  float: none !important;
  color: #f1f1f1 !important;
  font-size: 13px !important;
  font-weight: 500 !important;
  line-height: 1.35 !important;
  overflow: hidden !important;
  display: -webkit-box !important;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  white-space: normal !important;
  background: transparent !important;
}
body.zk-shell #catalog.kc_ml li a.is-playing .zk-pl-title,
body.zk-shell #catalog.kc_ml li a:has(.zk-cata-dot.is-on) .zk-pl-title {
  color: #3ea6ff !important;
}
body.zk-shell #catalog.kc_ml li .zk-pl-sub {
  display: flex !important;
  flex-direction: row !important;
  flex-wrap: nowrap !important;
  align-items: center !important;
  gap: 8px !important;
  float: none !important;
  width: auto !important;
  height: auto !important;
  margin: 0 !important;
  padding: 0 !important;
  color: #aaa !important;
  font-size: 12px !important;
  line-height: 1.2 !important;
  background: transparent !important;
}
body.zk-shell #catalog.kc_ml li .zk-pl-sub .zk-pl-dur,
body.zk-shell #catalog.kc_ml li .zk-pl-sub span {
  display: inline !important;
  float: none !important;
  width: auto !important;
  height: auto !important;
  margin: 0 !important;
  padding: 0 !important;
  background: transparent !important;
  border-radius: 0 !important;
  color: #aaa !important;
  font-size: 12px !important;
  line-height: 1.2 !important;
  text-align: left !important;
}
body.zk-shell #catalog.kc_ml li .zk-pl-sub label {
  display: inline !important;
  float: none !important;
  width: auto !important;
  height: auto !important;
  margin: 0 !important;
  padding: 0 !important;
  background: transparent !important;
  color: #3ea6ff !important;
  font-size: 12px !important;
  line-height: 1.2 !important;
}
body.zk-shell #catalog.kc_ml li .zk-pl-sub label:empty {
  display: none !important;
}
body.zk-shell #catalog.kc_ml li button.sk,
body.zk-shell #catalog.kc_ml li button.sk2,
body.zk-shell #catalog.kc_ml li button.sk-trial,
body.zk-shell #catalog.kc_ml li button.sk-paid {
  float: none !important;
  margin: 2px 0 0 auto !important;
  height: 18px !important;
  min-width: 0 !important;
  width: auto !important;
  padding: 0 6px !important;
  border-radius: 2px !important;
  font-size: 10px !important;
  line-height: 18px !important;
  opacity: 0.85;
  align-self: flex-start;
  flex-shrink: 0;
}
body.zk-shell #catalog.kc_ml li .zk-cata-dot {
  display: none !important;
}

@media (max-width: 900px) {
  body.zk-shell .zk-player-wrap {
    width: 100%;
    border-radius: 0;
  }
  body.zk-shell .zk-player-wrap #player-con,
  body.zk-shell .zk-player-wrap .prism-player {
    height: 56.25vw !important;
    max-height: 480px;
  }
}