.page-faq {
  --faq-radius-lg: 28px;
  --faq-radius-md: 20px;
  position: relative;
  background:
    radial-gradient(1100px 420px at 88% -2%, rgba(181, 55, 242, 0.16), transparent 62%),
    radial-gradient(820px 360px at 4% 10%, rgba(0, 255, 159, 0.08), transparent 55%),
    linear-gradient(180deg, rgba(11, 27, 63, 0.5) 0%, rgba(11, 19, 43, 0) 320px);
}

.page-faq details[hidden] {
  display: none !important;
}

.support-hero {
  padding: clamp(18px, 3vw, 36px) 0 0;
}

.terminal.support-hero__frame {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 24px;
  padding: 24px 20px 0;
}

.support-hero__topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px 16px;
  flex-wrap: wrap;
}

.support-hero__inner {
  display: grid;
  gap: 28px;
  padding: 18px 0 6px;
}

.support-hero__copy .page-title {
  margin: 10px 0 14px;
}

.support-hero__meta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.support-hero__stat {
  flex: 1 1 120px;
  padding: 16px 18px;
  border-radius: var(--faq-radius-md);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(0, 212, 255, 0.16);
  transition: border-color 0.3s ease, transform 0.3s ease;
}

.support-hero__stat:hover {
  border-color: rgba(0, 255, 159, 0.4);
  transform: translateY(-2px);
}

.support-hero__num {
  display: block;
  font-family: var(--font-head);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--c-green);
  text-shadow: 0 0 12px rgba(0, 255, 159, 0.5);
}

.support-hero__unit {
  display: inline-block;
  margin-top: 4px;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: var(--c-text-dim);
}

.media-frame.support-hero__visual {
  margin: 0;
  aspect-ratio: 4 / 1;
  border-radius: 0 0 var(--faq-radius-lg) var(--faq-radius-lg);
  overflow: hidden;
}

.support-hero__visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.support-hot {
  padding: clamp(56px, 8vw, 96px) 0 clamp(40px, 6vw, 72px);
}

.support-section-head {
  display: grid;
  gap: 8px;
  margin-bottom: 28px;
}

.support-section-head__inner {
  display: grid;
  gap: 8px;
}

.support-section-title {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  letter-spacing: 0.02em;
  color: var(--c-text);
  text-shadow: 0 0 18px rgba(0, 255, 159, 0.25);
}

.support-section-lead {
  margin: 0;
  max-width: 62ch;
  color: var(--c-text-dim);
  line-height: 1.8;
}

.support-hot__board {
  display: grid;
  gap: 20px;
  align-items: start;
}

.support-hot__rail {
  display: flex;
  gap: 10px;
  flex-wrap: nowrap;
  overflow-x: auto;
  padding-bottom: 6px;
  scrollbar-width: thin;
}

.support-hot__rail .btn-filter {
  white-space: nowrap;
}

.support-hot__list {
  display: grid;
  gap: 18px;
  min-width: 0;
}

.faq-card {
  position: relative;
  background: rgba(255, 255, 255, 0.06);
  border-radius: var(--faq-radius-lg);
  transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

.faq-card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, rgba(0, 255, 159, 0.45), rgba(0, 212, 255, 0.12) 34%, rgba(181, 55, 242, 0.5));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask-composite: exclude;
  pointer-events: none;
}

.faq-card[open] {
  background: rgba(255, 255, 255, 0.09);
  box-shadow: 0 18px 44px rgba(4, 10, 28, 0.5), 0 0 0 1px rgba(0, 255, 159, 0.06);
}

.faq-card__summary {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 20px;
  cursor: pointer;
  list-style: none;
}

.faq-card__summary::-webkit-details-marker {
  display: none;
}

.faq-card__tag {
  flex: 0 0 auto;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  padding: 5px 10px;
  border-radius: 999px;
  border: 1px solid;
  background: rgba(255, 255, 255, 0.04);
}

.faq-card[data-filter-group="订阅"] .faq-card__tag {
  color: var(--c-green);
  border-color: rgba(0, 255, 159, 0.4);
}

.faq-card[data-filter-group="收藏"] .faq-card__tag {
  color: var(--c-cyan);
  border-color: rgba(0, 212, 255, 0.4);
}

.faq-card[data-filter-group="反馈"] .faq-card__tag {
  color: var(--c-purple);
  border-color: rgba(181, 55, 242, 0.45);
}

.faq-card[data-filter-group="技术"] .faq-card__tag {
  color: var(--c-text-dim);
  border-color: rgba(168, 178, 209, 0.35);
}

.faq-card__question {
  flex: 1 1 auto;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.5;
  color: var(--c-text);
}

.faq-card__more {
  position: relative;
  flex: 0 0 auto;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 1px solid rgba(0, 255, 159, 0.4);
  background: rgba(0, 255, 159, 0.08);
  transition: transform 0.3s var(--ease), background-color 0.3s ease, border-color 0.3s ease;
}

.faq-card__more::before,
.faq-card__more::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  background: var(--c-green);
  border-radius: 2px;
  transform: translate(-50%, -50%);
}

.faq-card__more::before {
  width: 10px;
  height: 2px;
}

.faq-card__more::after {
  width: 2px;
  height: 10px;
}

.faq-card[open] .faq-card__more {
  transform: rotate(135deg);
  border-color: rgba(181, 55, 242, 0.6);
  background: rgba(181, 55, 242, 0.14);
}

.faq-card[open] .faq-card__more::after {
  background: var(--c-purple);
}

.faq-card__answer {
  padding: 0 20px 22px;
}

.faq-card__answer p {
  margin: 0;
  padding-top: 16px;
  border-top: 1px dashed rgba(168, 178, 209, 0.22);
  color: var(--c-text-dim);
  line-height: 1.8;
  font-size: 0.95rem;
}

.support-index {
  padding: clamp(40px, 6vw, 72px) 0 clamp(56px, 8vw, 96px);
}

.support-index__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  margin-top: 28px;
}

.index-panel {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 26px 24px;
  border-radius: var(--faq-radius-lg);
  border: 1px solid rgba(0, 212, 255, 0.14);
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.09), rgba(255, 255, 255, 0.04));
  overflow: hidden;
  transition: transform 0.35s var(--ease), border-color 0.3s ease, box-shadow 0.35s ease;
}

.index-panel:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 255, 159, 0.28);
  box-shadow: 0 20px 46px rgba(4, 10, 28, 0.48);
}

.index-panel::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--c-green), rgba(0, 212, 255, 0.2), var(--c-purple));
  opacity: 0.7;
}

.index-panel__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.index-panel__count {
  flex: 0 0 auto;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--c-text-faint);
  border: 1px solid rgba(168, 178, 209, 0.25);
  border-radius: 999px;
  padding: 4px 10px;
}

.index-panel__title {
  margin: 0;
  font-family: var(--font-head);
  font-size: 1.3rem;
  letter-spacing: 0.03em;
  color: var(--c-text);
}

.index-panel__text {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--c-text-dim);
}

.index-panel__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  margin-top: 6px;
}

.index-panel__link {
  font-size: 0.9rem;
  color: var(--c-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 212, 255, 0.35);
  padding-bottom: 2px;
  transition: color 0.25s ease, border-color 0.25s ease;
}

.index-panel__link:hover {
  color: var(--c-text);
  border-color: rgba(0, 212, 255, 0.7);
}

.index-panel__link--major {
  color: var(--c-green);
  border-bottom-color: rgba(0, 255, 159, 0.4);
  font-weight: 600;
}

.index-panel__link--major:hover {
  color: var(--c-green);
  border-bottom-color: rgba(0, 255, 159, 0.8);
}

.support-contact {
  padding: clamp(40px, 6vw, 72px) 0 clamp(64px, 9vw, 110px);
}

.terminal.support-contact__frame {
  padding: 0;
  overflow: hidden;
}

.support-contact__grid {
  display: grid;
  gap: 26px;
  padding: 28px 20px;
  align-items: center;
}

.support-contact__title {
  margin: 10px 0 12px;
  font-family: var(--font-head);
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  color: var(--c-text);
  text-shadow: 0 0 18px rgba(181, 55, 242, 0.3);
}

.support-contact__lead {
  margin: 0 0 18px;
  max-width: 56ch;
  color: var(--c-text-dim);
  line-height: 1.8;
}

.support-contact__list {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  display: grid;
}

.support-contact__row {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  gap: 14px;
  padding: 13px 0;
  border-bottom: 1px dashed rgba(168, 178, 209, 0.22);
}

.support-contact__label {
  color: var(--c-text-faint);
  font-size: 0.85rem;
  letter-spacing: 0.06em;
}

.support-contact__value {
  color: var(--c-text);
  font-size: 0.95rem;
  word-break: break-word;
}

.support-contact__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.media-frame.support-contact__visual {
  margin: 0;
  aspect-ratio: 2 / 1;
  border-radius: var(--faq-radius-lg);
  overflow: hidden;
  border: 1px solid rgba(0, 212, 255, 0.16);
}

.support-contact__visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

@media (min-width: 860px) {
  .terminal.support-hero__frame {
    padding: 34px 34px 0;
  }

  .support-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
    gap: 40px;
    padding: 26px 0 28px;
  }

  .support-hero__meta {
    justify-content: flex-end;
  }

  .support-hero__stat {
    flex: 0 1 150px;
  }

  .support-section-head {
    margin-bottom: 32px;
  }

  .support-section-head--split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: end;
    gap: 40px;
  }

  .support-hot__board {
    grid-template-columns: 210px minmax(0, 1fr);
    gap: 28px;
  }

  .support-hot__rail {
    flex-direction: column;
    gap: 12px;
    position: sticky;
    top: calc(var(--topbar-h) + 88px);
  }

  .support-hot__rail .btn-filter {
    width: 100%;
    display: flex;
    justify-content: flex-start;
    align-items: center;
  }

  .support-hot__list {
    gap: 22px;
  }

  .faq-card__summary {
    padding: 24px 26px;
  }

  .faq-card__question {
    font-size: 1.05rem;
  }

  .faq-card__answer {
    padding: 0 26px 26px;
  }

  .support-index__grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }

  .index-panel--a {
    grid-column: span 5;
  }

  .index-panel--b {
    grid-column: span 7;
  }

  .index-panel--c {
    grid-column: span 4;
  }

  .index-panel--d {
    grid-column: span 8;
  }

  .index-panel {
    padding: 30px 28px;
  }

  .support-contact__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 40px;
    padding: 40px 42px;
  }

  .support-contact__visual {
    order: 2;
  }
}