/* 视频课程目录 — 课程网格。只在 video_course_list 引入。 */

html.page--video_course_list,
html.page--video_course_list body,
html.page--video_course_list #panel,
html.page--video_course_list #panel .main,
html.page--video_course_list #panel .section {
  background: #f5f5f5 !important;
}

html.page--video_course_list #panel .main {
  padding-top: 72px !important;
  padding-bottom: 48px !important;
}

html.page--video_course_list #panel .section {
  box-shadow: none !important;
  border: 0 !important;
}

.theme--dark.page--video_course_list,
.theme--dark.page--video_course_list body,
.theme--dark.page--video_course_list #panel,
.theme--dark.page--video_course_list #panel .main,
.theme--dark.page--video_course_list #panel .section {
  background: #0d1117 !important;
}

.vc-catalog {
  --vc-card: #ffffff;
  --vc-line: #ececec;
  --vc-line-strong: #e0e0e0;
  --vc-accent: #3370ff;
  --vc-accent-hover: #295fe0;
  --vc-accent-line: rgba(51, 112, 255, 0.28);
  --vc-text: #262626;
  --vc-text-2: #595959;
  --vc-text-3: #8c8c8c;
  --vc-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
  --vc-shadow-hover: 0 10px 28px rgba(15, 23, 42, 0.08);
  --vc-input: #fafafa;
  color: var(--vc-text);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  background:
    radial-gradient(920px 320px at 70% -80px, rgba(51, 112, 255, 0.08), transparent 70%),
    transparent;
}

.theme--dark .vc-catalog {
  --vc-card: #323334;
  --vc-line: #30363d;
  --vc-line-strong: #30363d;
  --vc-accent: #58a6ff;
  --vc-accent-hover: #79b8ff;
  --vc-accent-line: rgba(88, 166, 255, 0.28);
  --vc-text: #c9d1d9;
  --vc-text-2: #8b949e;
  --vc-text-3: #8b949e;
  --vc-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
  --vc-shadow-hover: 0 10px 28px rgba(0, 0, 0, 0.35);
  --vc-input: #0d1117;
}

.vc-catalog *,
.vc-catalog *::before,
.vc-catalog *::after {
  box-sizing: border-box;
}

.vc-catalog__wrap {
  max-width: 1120px;
  margin: 0 auto;
  padding: 20px 8px 24px;
}

.vc-catalog__head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 22px;
}

.vc-catalog__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 10px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--vc-accent);
}

.vc-catalog__eyebrow-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--vc-accent);
  box-shadow: 0 0 0 4px rgba(51, 112, 255, 0.12);
}

.vc-catalog h1 {
  margin: 0;
  font-size: 32px;
  line-height: 1.2;
  font-weight: 600;
  letter-spacing: -0.03em;
  color: var(--vc-text);
}

.vc-catalog__lede {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--vc-text-2);
}

.vc-catalog__copy {
  position: relative;
  padding-right: 44px;
}

.vc-catalog__setting {
  position: absolute;
  top: 0;
  right: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  padding: 0;
  border: 1px solid var(--vc-line-strong);
  border-radius: 8px;
  background: var(--vc-card);
  color: var(--vc-text-3);
  cursor: pointer;
  box-shadow: none;
}

.vc-catalog__setting:hover {
  color: var(--vc-accent);
  border-color: var(--vc-accent-line);
  text-decoration: none;
}

.vc-catalog__counts {
  display: flex;
  gap: 28px;
  margin: 0;
  padding: 0;
  list-style: none;
  flex-shrink: 0;
}

.vc-catalog__counts b {
  display: block;
  font-size: 22px;
  line-height: 1.1;
  font-weight: 700;
  letter-spacing: -0.04em;
  font-variant-numeric: tabular-nums;
  color: var(--vc-text);
}

.vc-catalog__counts span {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  color: var(--vc-text-3);
}

.vc-create {
  display: flex;
  align-items: flex-end;
  gap: 12px;
  margin-bottom: 16px;
  padding: 16px 18px;
  background: var(--vc-card);
  border: 1px dashed var(--vc-accent-line);
  border-radius: 16px;
}

.vc-create__lead { flex: 0 0 196px; }
.vc-create__lead strong { display: block; font-size: 15px; color: var(--vc-text); }
.vc-create__lead span { display: block; margin-top: 4px; font-size: 12px; line-height: 1.5; color: var(--vc-text-3); }

.vc-create label {
  flex: 1 1 180px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin: 0;
  font-size: 12px;
  color: var(--vc-text-3);
}

.vc-create input {
  height: 36px;
  margin: 0;
  padding: 0 12px;
  border: 1px solid var(--vc-line-strong);
  border-radius: 9px;
  background: var(--vc-input);
  color: var(--vc-text);
  font: inherit;
  font-size: 14px;
  box-shadow: none;
}

.vc-create input:focus {
  outline: none;
  border-color: var(--vc-accent);
  background: var(--vc-card);
  box-shadow: 0 0 0 3px rgba(51, 112, 255, 0.12);
}

.vc-create__msg {
  flex: 1 0 100%;
  min-height: 0;
  font-size: 13px;
  color: var(--vc-text-2);
}

.vc-create__msg:empty { display: none; }

.vc-catalog__empty {
  margin: 28px 0 0;
  font-size: 15px;
  color: var(--vc-text-2);
}

.vc-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  align-items: stretch;
}

.vc-card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 100%;
  background: var(--vc-card);
  border: 1px solid var(--vc-line);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--vc-shadow);
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.vc-card::after {
  content: "";
  position: absolute;
  left: 18px;
  right: 18px;
  top: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--vc-accent), transparent);
  opacity: 0;
  transition: opacity 0.25s ease;
}

.vc-card:hover {
  border-color: var(--vc-accent-line);
  box-shadow: var(--vc-shadow-hover);
}

.vc-card:hover::after { opacity: 1; }

.vc-card--muted { opacity: 0.78; }
.vc-card--muted:hover {
  border-color: var(--vc-line);
  box-shadow: var(--vc-shadow);
}
.vc-card--muted:hover::after { opacity: 0; }
.vc-card--draft { border-style: dashed; }

.vc-card__order {
  display: flex;
  gap: 6px;
  margin-top: 12px;
}
.vc-card__order button {
  height: 28px;
  padding: 0 10px;
  border: 1px solid var(--vc-line);
  border-radius: 8px;
  background: #fff;
  color: var(--vc-text-2, #3f3f46);
  font-size: 12px;
  line-height: 26px;
  cursor: pointer;
}
.vc-card__order button:hover:not(:disabled) {
  border-color: #2563eb;
  color: #2563eb;
}
.vc-card__order button:disabled {
  opacity: 0.4;
  cursor: default;
}

.vc-card__cover {
  position: relative;
  height: 156px;
  flex-shrink: 0;
  overflow: hidden;
  color: #fff;
  background:
    radial-gradient(120px 80px at 100% 0%, rgba(255, 255, 255, 0.38), transparent 62%),
    linear-gradient(155deg, var(--a), var(--b));
}

.vc-card__cover::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.16) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.16) 1px, transparent 1px);
  background-size: 20px 20px;
  mask-image: linear-gradient(160deg, #000 10%, transparent 72%);
}

.vc-card__cover img {
  position: absolute;
  inset: 0;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.vc-card__char {
  position: absolute;
  right: -6px;
  bottom: -22px;
  font-size: 108px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.05em;
  color: rgba(255, 255, 255, 0.22);
  user-select: none;
}

.vc-card__cover img ~ .vc-card__char { opacity: 0; }

.vc-card__cover:has(img)::before,
.vc-card__cover:has(img) .vc-card__foot-label {
  display: none;
}

.vc-card__foot-label {
  position: absolute;
  z-index: 2;
  left: 14px;
  bottom: 12px;
  font-size: 13px;
  font-weight: 600;
}

.vc-card__cover--a { --a: #3370ff; --b: #1182eb; }
.vc-card__cover--b { --a: #0f9f90; --b: #147d86; }
.vc-card__cover--c { --a: #6d5efc; --b: #7c3aed; }
.vc-card__cover--d { --a: #3b82f6; --b: #1d4ed8; }
.vc-card__cover--old { --a: #a3a3a3; --b: #737373; }
.vc-card__cover--draft { --a: #8c8c8c; --b: #595959; }

.vc-card__body {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: 16px 18px 18px;
  min-width: 0;
}

.vc-card h2 {
  margin: 0;
  font-size: 17px;
  line-height: 1.4;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--vc-text);
}

.vc-card__teacher {
  margin: 6px 0 0;
  font-size: 13px;
  color: var(--vc-text-3);
}

.vc-card__desc {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--vc-text-2);
}

.vc-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 12px;
}

.vc-tag {
  display: inline-flex;
  align-items: center;
  height: 22px;
  padding: 0 8px;
  border-radius: 6px;
  border: 1px solid #eee;
  background: #f7f7f7;
  color: var(--vc-text-3);
  font-size: 12px;
  font-weight: 500;
  line-height: 1;
  white-space: nowrap;
}

.theme--dark .vc-tag {
  background: #2a2b2c;
  border-color: #30363d;
}

.vc-tag--live { background: #f6ffed; color: #2d8a47; border-color: #b7eb8f; }
.vc-tag--need { background: #fff7e6; color: #d46b08; border-color: #ffd591; }
.vc-tag--soon { background: #f0f5ff; color: #3370ff; border-color: #d6e4ff; }
.vc-tag--ended { background: #fff1f0; color: #ff4d4f; border-color: #ffccc7; }
.vc-tag--draft { background: #fafafa; color: #8c8c8c; border-color: #e5e5e5; }

.theme--dark .vc-tag--live { background: rgba(45, 138, 71, 0.16); color: #3fb950; border-color: rgba(63, 185, 80, 0.35); }
.theme--dark .vc-tag--need { background: rgba(250, 140, 22, 0.15); color: #fa8c16; border-color: rgba(255, 213, 145, 0.35); }
.theme--dark .vc-tag--soon { background: rgba(88, 166, 255, 0.12); color: #58a6ff; border-color: rgba(88, 166, 255, 0.28); }
.theme--dark .vc-tag--ended { background: rgba(255, 77, 79, 0.15); color: #ff4d4f; border-color: rgba(255, 204, 199, 0.35); }

.vc-card__meta {
  margin-top: auto;
  padding-top: 16px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px 12px;
  align-items: center;
}

.vc-card__stat {
  font-size: 13px;
  color: var(--vc-text-3);
  font-variant-numeric: tabular-nums;
}

.vc-card__more,
.vc-card__more:link,
.vc-card__more:visited,
.vc-card__more:hover,
.vc-card__more:active {
  font-size: 13px;
  font-weight: 600;
  color: var(--vc-accent);
  text-decoration: none;
}

.vc-card__meta .vc-btn { grid-column: 1 / -1; width: 100%; }

.vc-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 36px;
  padding: 0 14px;
  border-radius: 9px;
  border: 1px solid transparent;
  font: inherit;
  font-size: 14px;
  font-weight: 600;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  box-shadow: none;
}

a.vc-btn--primary,
button.vc-btn--primary {
  background: var(--vc-accent);
  color: #fff !important;
  box-shadow: 0 4px 14px rgba(51, 112, 255, 0.28);
}

a.vc-btn--primary:hover,
button.vc-btn--primary:hover {
  background: var(--vc-accent-hover);
  color: #fff !important;
  text-decoration: none;
}

a.vc-btn--ghost,
button.vc-btn--ghost {
  background: var(--vc-card);
  color: var(--vc-text-2);
  border-color: var(--vc-line-strong);
}

a.vc-btn:hover,
button.vc-btn:hover,
a.vc-btn:focus,
button.vc-btn:focus {
  text-decoration: none;
}

a.vc-btn--ghost:hover,
button.vc-btn--ghost:hover {
  color: var(--vc-accent);
  border-color: var(--vc-accent-line);
  text-decoration: none;
}

.vc-btn[aria-disabled="true"] {
  background: #f6f6f6;
  color: #a3a3a3;
  border-color: #efefef;
  box-shadow: none;
  pointer-events: none;
}

.theme--dark .vc-btn[aria-disabled="true"] {
  background: #2a2b2c;
  color: #8b949e;
  border-color: #30363d;
}

.vc-create .vc-btn { flex: 0 0 auto; }

@media (max-width: 980px) {
  .vc-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 680px) {
  html.page--video_course_list,
  html.page--video_course_list body {
    overflow-x: hidden;
  }

  html.page--video_course_list #panel .main {
    padding-top: 64px !important;
    padding-left: 0 !important;
    padding-right: 0 !important;
  }

  html.page--video_course_list .row {
    margin-left: 0 !important;
    margin-right: 0 !important;
    max-width: 100% !important;
    width: 100% !important;
  }

  html.page--video_course_list .columns,
  html.page--video_course_list .section {
    float: none !important;
    width: 100% !important;
    max-width: 100% !important;
    padding-left: 0 !important;
    padding-right: 0 !important;
  }

  .vc-catalog,
  .vc-catalog__wrap,
  .vc-grid,
  .vc-card {
    min-width: 0;
    max-width: 100%;
  }

  .vc-catalog__wrap {
    padding: 8px 16px 40px;
  }

  .vc-catalog h1 {
    font-size: 26px;
  }

  .vc-catalog__head {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }

  .vc-catalog__counts {
    gap: 20px;
  }

  .vc-grid { grid-template-columns: 1fr; }

  .vc-card {
    overflow: hidden;
  }

  .vc-card__cover {
    position: relative;
    width: 100%;
    height: auto;
    aspect-ratio: 16 / 9;
    overflow: hidden;
  }

  .vc-card__cover img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    max-width: none;
    object-fit: cover;
  }

  .vc-card__body {
    position: relative;
    z-index: 1;
    margin: 0;
    background: var(--vc-card);
  }

  .vc-card__meta {
    grid-template-columns: 1fr;
  }

  .vc-create { flex-wrap: wrap; }
  .vc-create__lead { flex-basis: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  .vc-card { transition: none; }
}

.vc-catalog-modal {
  position: fixed;
  inset: 0;
  z-index: 10040;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(15, 23, 42, 0.45);
}

.vc-catalog-modal[hidden] { display: none; }

.vc-catalog-modal__card {
  width: min(440px, 100%);
  padding: 22px 22px 18px;
  border-radius: 16px;
  background: var(--vc-card);
  color: var(--vc-text);
  box-shadow: 0 18px 50px rgba(15, 23, 42, 0.18);
}

.vc-catalog-modal__card h2 {
  margin: 0 0 16px;
  font-size: 18px;
  line-height: 1.3;
  font-weight: 650;
}

.vc-catalog-modal__card label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin: 0 0 12px;
  font-size: 12px;
  color: var(--vc-text-3);
}

.vc-catalog-modal__card input {
  height: 36px;
  margin: 0;
  padding: 0 12px;
  border: 1px solid var(--vc-line-strong);
  border-radius: 9px;
  background: var(--vc-input);
  color: var(--vc-text);
  font: inherit;
  font-size: 14px;
  box-shadow: none;
}

.vc-catalog-modal__card input:focus {
  outline: none;
  border-color: var(--vc-accent);
}

.vc-catalog-modal__hint {
  margin: 0 0 14px;
  font-size: 12px;
  line-height: 1.5;
  color: var(--vc-text-3);
}

.vc-catalog-modal__actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}