body.support-nav-light .site-header {
  --support-nav-text: #111827;
}

.support-detail-page {
  background: #fff;
}

.support-course-page {
  padding-top: calc(var(--xtu-header-height, 74px) + 52px);
  background: #f5f6f8;
}

.support-detail-page .support-container {
  width: min(1220px, calc(100% - 32px));
  margin: 0 auto;
}

/* Common fixed black sub navigation strip under the white site header.
 * Reuses the same visual language as download center / cooperation pages,
 * while keeping legacy page-specific class names for compatibility.
 */
.xtu-subnav-page {
  padding-top: calc(var(--xtu-header-height, 74px) + 52px);
}

.xtu-subnav-strip {
  position: fixed;
  left: 0;
  right: 0;
  top: calc(var(--xtu-header-height, 74px) - 1px);
  z-index: 1029;
  background: #090b0f;
  color: #fff;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.12);
}

.xtu-subnav-strip-title {
  display: flex;
  align-items: center;
  min-height: 56px;
  color: #fff;
  font-size: 18px;
  line-height: 1.2;
  font-weight: 600;
  letter-spacing: .02em;
  white-space: nowrap;
}

.support-detail-hero {
  padding-top: 82px;
  background: linear-gradient(180deg, #f5f5f7 0%, #f6f6f8 100%);
  overflow: hidden;
}

.support-detail-page:not(.support-course-page) .support-detail-hero-inner {
  min-height: 180px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 196px;
  align-items: center;
  gap: 20px;
  padding: 30px 0;
}

.support-course-page .support-detail-hero-inner {
  min-height: 88px;
  display: flex;
  align-items: center;
  padding: 18px 0 16px;
}

.support-course-subnav-strip {
  top: calc(var(--xtu-header-height, 74px) - 1px);
}

.support-detail-page:not(.support-course-page) .support-detail-hero-copy h1 {
  margin: 0;
  color: #111827;
  font-size: 28px;
  line-height: 36px;
  letter-spacing: -0.03em;
  font-weight: 600;
}

.support-detail-page:not(.support-course-page) .support-detail-hero-copy p {
  margin: 2px 0 0;
  color: #4b5563;
  font-size: 28px;
  line-height: 36px;
  letter-spacing: -0.03em;
  font-weight: 400;
}

.support-detail-hero-tip {
  display: inline-block;
  margin-top: 8px;
  color: #9ca3af;
  font-size: 13px;
  line-height: 20px;
}

.support-detail-page:not(.support-course-page) .support-detail-hero-media {
  display: flex;
  align-items: flex-end;
  justify-content: flex-end;
  min-height: 100%;
}

.support-detail-page:not(.support-course-page) .support-detail-hero-media img {
  display: block;
  max-width: 100%;
  width: min(176px, 100%);
  max-height: 128px;
  height: auto;
  object-fit: contain;
  margin-left: auto;
}

.support-detail-breadcrumbs {
  display: flex;
  align-items: center;
  flex-wrap: nowrap;
  gap: 8px;
  min-width: 0;
  max-width: 100%;
  overflow-x: auto;
  overflow-y: hidden;
  white-space: nowrap;
  scrollbar-width: none;
  -ms-overflow-style: none;
  color: #8b919a;
  font-size: 15px;
  line-height: 24px;
}

.support-detail-breadcrumbs::-webkit-scrollbar {
  display: none;
}

.support-detail-breadcrumbs > * {
  flex: 0 0 auto;
}

.support-detail-breadcrumbs a,
.support-detail-breadcrumbs span {
  white-space: nowrap;
}

.support-detail-breadcrumbs a {
  color: #8b919a;
  text-decoration: none;
}

.support-detail-breadcrumbs a:hover {
  color: #111827;
}

.support-detail-main {
  padding-top: 56px;
  padding-bottom: 20px;
}

.support-detail-tabs {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 44px;
  border-bottom: 1px solid #e5e7eb;
  margin-bottom: 28px;
}

.support-detail-tab {
  position: relative;
  padding: 0 0 18px;
  border: 0;
  background: transparent;
  color: #8b919a;
  font-size: 16px;
  line-height: 24px;
  font-weight: 500;
  transition: color .2s ease;
}

.support-detail-tab::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  border-radius: 999px;
  background: transparent;
  transition: background .2s ease;
}

.support-detail-tab:hover {
  color: #111827;
}

.support-detail-tab.is-active {
  color: #111827;
}

.support-detail-tab.is-active::after {
  background: #111827;
}

.support-detail-panel {
  display: none;
}

.support-detail-panel.is-active {
  display: block;
}

.support-detail-subtabs {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 32px;
}

.support-detail-subtab {
  height: 40px;
  padding: 0 24px;
  border: 1px solid #111827;
  border-radius: 999px;
  background: #fff;
  color: #4b5563;
  font-size: 15px;
  line-height: 38px;
  font-weight: 500;
  transition: all .2s ease;
}

.support-detail-subtab:hover {
  color: #111827;
}

.support-detail-subtab.is-active {
  background: #111827;
  color: #fff;
}

.support-detail-subpanel {
  display: none;
}

.support-detail-subpanel.is-active {
  display: block;
}

.support-video-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.support-video-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border-radius: 18px;
  background: #f7f8fa;
  text-decoration: none;
  color: #111827;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}

.support-video-card:hover {
  transform: translateY(-2px);
  background: #fafbfc;
  box-shadow: 0 12px 24px rgba(15,23,42,.05);
}

.support-video-card-media {
  position: relative;
  display: block;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: #eef1f4;
}

.support-video-card-media img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.support-video-card-title {
  display: block;
  padding: 18px 20px 22px;
  color: #111827;
  font-size: 18px;
  line-height: 1.5;
  font-weight: 500;
}

.support-article-list {
  display: grid;
  gap: 12px;
}

.support-article-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 56px;
  padding: 0 16px;
  border-radius: 12px;
  background: #f7f8fa;
  color: #1f2937;
  text-decoration: none;
  font-size: 14px;
  line-height: 1.5;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}

.support-article-item:hover {
  transform: translateY(-1px);
  background: #fafbfc;
  box-shadow: 0 10px 20px rgba(15,23,42,.04);
}

.support-article-item i {
  color: #9aa1ab;
  font-size: 13px;
  flex: 0 0 auto;
}

.support-empty-state {
  padding: 20px 16px;
  text-align: center;
  color: #9aa1ab;
  font-size: 14px;
  line-height: 22px;
}

.support-more-wrap {
  display: flex;
  justify-content: center;
  margin-top: 22px;
}

.support-more-btn {
  height: 38px;
  padding: 0 22px;
  border: 1px solid #e7eaee;
  border-radius: 999px;
  background: #fff;
  color: #4b5563;
  font-size: 14px;
  line-height: 36px;
  font-weight: 500;
  transition: all .2s ease;
}

.support-more-btn:hover {
  color: #111827;
  border-color: #d8dde3;
  background: #fafbfc;
}

.support-collapsed-item {
  display: none !important;
}

.support-detail-contact {
  padding-bottom: 88px;
}

.support-detail-contact .support-contact-heading h2 {
  margin-top: 72px;
}

.support-course-page .support-course-tabs {
  justify-content: flex-start;
  gap: 0;
}

.support-course-page .support-course-article {
  max-width: 920px;
  margin: 0 auto;
  padding: 40px 44px;
  border-radius: 0;
  background: #fff;
  box-shadow: 0 18px 48px rgba(15, 23, 42, 0.06);
  border: 1px solid #eef1f4;
}

.support-course-page .support-course-header {
  margin-bottom: 28px;
  padding-bottom: 22px;
  border-bottom: 1px solid #e5e7eb;
  text-align: center;
}

.support-course-page .support-course-header h2 {
  margin: 0;
  color: #111827;
  font-size: 30px;
  line-height: 1.35;
  font-weight: 600;
  letter-spacing: -0.03em;
}

.support-course-page .support-course-content {
  color: #374151;
  font-size: 16px;
  line-height: 1.9;
}

.support-course-page .support-course-content > :first-child {
  margin-top: 0;
}

.support-course-page .support-course-content > :last-child {
  margin-bottom: 0;
}

.support-course-page .support-course-content h1,
.support-course-page .support-course-content h2,
.support-course-page .support-course-content h3,
.support-course-page .support-course-content h4,
.support-course-page .support-course-content h5,
.support-course-page .support-course-content h6 {
  color: #111827;
  margin: 1.8em 0 0.7em;
  line-height: 1.4;
  font-weight: 600;
}

.support-course-page .support-course-content p,
.support-course-page .support-course-content ul,
.support-course-page .support-course-content ol,
.support-course-page .support-course-content blockquote,
.support-course-page .support-course-content table {
  margin: 0 0 1.15em;
}

.support-course-page .support-course-content ul,
.support-course-page .support-course-content ol {
  padding-left: 1.4em;
}

.support-course-page .support-course-content a {
  color: var(--brand-blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.support-course-page .support-course-content img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 1.5em auto;
  border-radius: 18px;
}

.support-course-page .support-course-content table {
  width: 100%;
  overflow: hidden;
  border-collapse: collapse;
  border-radius: 16px;
  box-shadow: inset 0 0 0 1px #e5e7eb;
}

.support-course-page .support-course-content th,
.support-course-page .support-course-content td {
  padding: 12px 14px;
  border: 1px solid #e5e7eb;
  text-align: left;
  vertical-align: top;
}

.support-course-page .support-course-content blockquote {
  padding: 16px 20px;
  border-left: 4px solid var(--brand-blue);
  background: #f7f8fa;
  color: #4b5563;
  border-radius: 0 14px 14px 0;
}

@media (max-width: 767.98px) {
  .support-course-page .support-course-article {
    padding: 28px 20px;
    border-radius: 0;
  }

  .support-course-page .support-course-header {
    margin-bottom: 22px;
    padding-bottom: 18px;
  }

  .support-course-page .support-course-header h2 {
    font-size: 24px;
  }

  .support-course-page .support-course-content {
    font-size: 15px;
    line-height: 1.8;
  }
}

@media (max-width: 1199.98px) {
  .support-detail-page:not(.support-course-page) .support-detail-hero-inner {
    grid-template-columns: minmax(0, 1fr) 168px;
    min-height: 164px;
    gap: 18px;
    padding: 26px 0;
  }

  .support-detail-page:not(.support-course-page) .support-detail-hero-media img {
    width: min(150px, 100%);
    max-height: 112px;
  }

  .support-video-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 575.98px) {
  .support-course-page,
  .xtu-subnav-page {
    padding-top: calc(var(--xtu-header-height, 62px) + 48px);
  }

  .support-course-subnav-strip,
  .xtu-subnav-strip {
    top: calc(var(--xtu-header-height, 62px) - 1px);
  }

  .support-detail-hero {
    padding-top: 76px;
  }

  .support-detail-page:not(.support-course-page) .support-detail-hero-inner {
    grid-template-columns: 1fr 140px;
    min-height: 152px;
    padding: 22px 0;
    gap: 14px;
  }

  .support-detail-page:not(.support-course-page) .support-detail-hero-media {
    justify-content: flex-end;
  }

  .support-detail-page:not(.support-course-page) .support-detail-hero-media img {
    width: min(122px, 100%);
    max-height: 92px;
  }

  .support-detail-tabs {
    gap: 28px;
    flex-wrap: wrap;
    justify-content: flex-start;
  }

  .support-video-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 767.98px) {
  .support-detail-page .support-container {
    width: min(100% - 20px, 1220px);
  }

  .support-detail-hero {
    padding-top: 74px;
  }

  .support-detail-page:not(.support-course-page) .support-detail-hero-inner {
    grid-template-columns: 1fr 108px;
    min-height: 138px;
    gap: 10px;
    padding: 18px 0;
  }

  .support-detail-page:not(.support-course-page) .support-detail-hero-media {
    justify-content: flex-end;
    align-self: end;
  }

  .support-detail-page:not(.support-course-page) .support-detail-hero-media img {
    width: min(96px, 100%);
    max-height: 76px;
  }

  .support-detail-hero-copy h1 {
    font-size: 24px;
    line-height: 32px;
    font-weight: 600;
  }

  .support-detail-hero-copy p {
    font-size: 24px;
    line-height: 32px;
    font-weight: 400;
  }

  .support-detail-main {
    padding-top: 36px;
  }

  .support-detail-tabs {
    flex-wrap: nowrap;
    justify-content: flex-start;
    gap: 28px;
    margin: 0 -10px 22px;
    padding: 0 10px;
    overflow-x: auto;
    scrollbar-width: none;
  }

  .support-detail-tabs::-webkit-scrollbar {
    display: none;
  }

  .support-detail-tab {
    flex: 0 0 auto;
    padding-bottom: 14px;
    font-size: 15px;
  }

  .support-detail-subtabs {
    justify-content: flex-start;
    flex-wrap: nowrap;
    gap: 12px;
    margin: 0 -10px 22px;
    padding: 0 10px;
    overflow-x: auto;
    scrollbar-width: none;
  }

  .support-detail-subtabs::-webkit-scrollbar {
    display: none;
  }

  .support-detail-subtab {
    flex: 0 0 auto;
    height: 36px;
    padding: 0 18px;
    font-size: 14px;
    line-height: 34px;
  }

  .support-video-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .support-video-card {
    border-radius: 16px;
  }

  .support-video-card-title {
    padding: 14px 16px 18px;
    font-size: 16px;
  }

  .support-article-list {
    gap: 14px;
  }

  .support-article-item {
    min-height: 52px;
    padding: 0 14px;
    border-radius: 12px;
    font-size: 14px;
  }

  .support-detail-contact {
    padding-bottom: 56px;
  }
}