.page-faq {
  --faq-grid-line: rgba(34, 48, 74, .42);
  --faq-qa-bg: rgba(26, 36, 54, .34);
  position: relative;
  isolation: isolate;
  background:
    radial-gradient(1100px 520px at 84% -8%, rgba(138, 107, 255, .10), transparent 62%),
    radial-gradient(880px 460px at -12% 22%, rgba(53, 231, 210, .07), transparent 62%);
  padding-bottom: 12px;
}

.page-faq::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(to right, var(--faq-grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--faq-grid-line) 1px, transparent 1px);
  background-size: 76px 76px;
  opacity: .34;
}

.page-faq .faq-crumbs {
  padding-top: 26px;
}

.page-faq .faq-head {
  padding: 20px 0 30px;
}

.page-faq .faq-head h1 {
  margin: 14px 0 18px;
  max-width: 22ch;
  font-size: clamp(27px, 4.6vw, 46px);
  font-weight: 700;
  line-height: 1.24;
  letter-spacing: -.01em;
  color: var(--white);
}

.page-faq .faq-head__lede {
  max-width: 64ch;
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--muted);
}

/* ---------- 三条短答面板 ---------- */

.page-faq .faq-quick {
  padding: 6px 0 52px;
}

.page-faq .faq-quick__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-faq .faq-quick__panel {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 22px 20px;
  text-decoration: none;
  color: inherit;
  transition: transform .28s var(--ease), border-color .28s var(--ease), box-shadow .28s var(--ease);
}

.page-faq .faq-quick__panel:hover,
.page-faq .faq-quick__panel:focus-visible {
  transform: translateY(-4px);
  border-color: rgba(53, 231, 210, .48);
  box-shadow: 0 14px 32px rgba(0, 0, 0, .5);
}

.page-faq .faq-quick__no {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--purple);
}

.page-faq .faq-quick__title {
  font-size: 19px;
  font-weight: 600;
  line-height: 1.42;
  color: var(--white);
}

.page-faq .faq-quick__text {
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--muted);
}

.page-faq .faq-quick__go {
  margin-top: auto;
  padding-top: 14px;
  font-size: 14px;
  font-weight: 600;
  color: var(--cyan);
}

.page-faq .faq-quick__go::after {
  content: " →";
  transition: transform .28s var(--ease);
  display: inline-block;
}

.page-faq .faq-quick__panel:hover .faq-quick__go::after,
.page-faq .faq-quick__panel:focus-visible .faq-quick__go::after {
  transform: translateX(4px);
}

/* ---------- 问题分组 ---------- */

.page-faq .faq-groups {
  padding: 0 0 34px;
}

.page-faq .faq-groups--lower {
  padding-top: 6px;
}

.page-faq .faq-group {
  border-top: 1px solid var(--line);
}

.page-faq .faq-group:last-child {
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group__summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  padding: 20px 4px;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-group__summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

.page-faq .faq-group__no {
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: .1em;
  color: var(--purple);
  transition: color .24s var(--ease);
}

.page-faq .faq-group:hover .faq-group__no,
.page-faq .faq-group[open] .faq-group__no {
  color: var(--cyan);
}

.page-faq .faq-group__title {
  font-size: clamp(18px, 2.2vw, 22px);
  font-weight: 600;
  line-height: 1.4;
  color: var(--white);
}

.page-faq .faq-group__caret {
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 999px;
}

.page-faq .faq-group__caret::before {
  content: "";
  width: 8px;
  height: 8px;
  margin-top: -3px;
  border-right: 1.5px solid var(--muted);
  border-bottom: 1.5px solid var(--muted);
  transform: rotate(45deg);
  transition: transform .3s var(--ease), border-color .3s var(--ease);
}

.page-faq .faq-group[open] .faq-group__caret {
  border-color: rgba(53, 231, 210, .5);
}

.page-faq .faq-group[open] .faq-group__caret::before {
  margin-top: 3px;
  transform: rotate(-135deg);
  border-color: var(--cyan);
}

.page-faq .faq-group__body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  margin-left: 3px;
  padding: 0 4px 30px 15px;
  border-left: 1px solid transparent;
  transition: border-color .3s var(--ease);
}

.page-faq .faq-group[open] .faq-group__body {
  border-left-color: var(--cyan);
}

.page-faq .faq-qas {
  display: grid;
  gap: 10px;
}

.page-faq .faq-qa {
  padding: 15px 17px;
  border-radius: var(--radius-sm);
  background: var(--faq-qa-bg);
}

.page-faq .faq-qa h3 {
  margin: 0 0 7px;
  font-size: 16.5px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--white);
}

.page-faq .faq-qa p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .faq-group__actions {
  margin: 20px 0 0;
}

.page-faq .faq-group__aside {
  margin: 0;
}

.page-faq .faq-group__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

.page-faq .faq-group__caption {
  margin: 12px 0 0;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .06em;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 延迟对照 ---------- */

.page-faq .faq-latency {
  padding: 46px 0 50px;
  background: linear-gradient(180deg, rgba(11, 18, 32, 0), rgba(11, 18, 32, .9) 26%, rgba(11, 18, 32, .9) 74%, rgba(11, 18, 32, 0));
}

.page-faq .faq-latency__head {
  max-width: 62ch;
}

.page-faq .faq-latency__head h2 {
  margin: 12px 0 10px;
  font-size: clamp(22px, 3.4vw, 32px);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -.01em;
  color: var(--white);
}

.page-faq .faq-latency__note {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-latency__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  margin-top: 28px;
}

.page-faq .faq-latency__bars {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-faq .latency-row {
  display: grid;
  grid-template-columns: 74px minmax(0, 1fr) 62px;
  align-items: center;
  gap: 12px;
  padding: 9px 0;
}

.page-faq .latency-row__label {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--muted);
}

.page-faq .latency-row__track {
  display: block;
  height: 12px;
  border-radius: 999px;
  background: rgba(34, 48, 74, .7);
  overflow: hidden;
}

.page-faq .latency-row__fill {
  display: block;
  height: 100%;
  border-radius: 999px;
}

.page-faq .latency-row__fill--pc {
  width: 66.7%;
  background: linear-gradient(90deg, rgba(53, 231, 210, .32), var(--cyan));
  box-shadow: 0 0 14px rgba(53, 231, 210, .35);
}

.page-faq .latency-row__fill--screen {
  width: 100%;
  background: linear-gradient(90deg, rgba(138, 107, 255, .3), var(--purple));
}

.page-faq .latency-row__value {
  font-family: var(--cond);
  font-size: 20px;
  font-weight: 700;
  line-height: 1;
  text-align: right;
}

.page-faq .latency-row__value--pc {
  color: var(--cyan);
  text-shadow: 0 0 16px rgba(53, 231, 210, .4);
}

.page-faq .latency-row__value--screen {
  color: var(--purple);
}

.page-faq .faq-latency__hint {
  margin: 16px 0 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--muted);
}

.page-faq .faq-latency__media {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
}

.page-faq .faq-latency__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 文末 ---------- */

.page-faq .faq-outro {
  padding: 10px 0 68px;
}

.page-faq .faq-outro__panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  padding: 28px 24px;
}

.page-faq .faq-outro__title {
  margin: 12px 0 10px;
  font-size: clamp(21px, 3vw, 28px);
  font-weight: 700;
  line-height: 1.34;
  color: var(--white);
}

.page-faq .faq-outro__text {
  margin: 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.82;
  color: var(--muted);
}

.page-faq .faq-outro__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 760px) {
  .page-faq .faq-quick__grid {
    grid-template-columns: 1.2fr 1fr .8fr;
    align-items: stretch;
  }

  .page-faq .faq-latency__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    align-items: center;
    gap: 34px;
  }

  .page-faq .faq-outro__panel {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 30px;
    padding: 32px 30px;
  }

  .page-faq .faq-outro__actions {
    flex-direction: column;
    align-items: stretch;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-group__body--split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 330px);
    align-items: start;
    gap: 30px;
  }

  .page-faq .faq-group__summary {
    padding: 24px 4px;
  }

  .page-faq .faq-qa {
    padding: 17px 20px;
  }
}

@media (max-width: 560px) {
  .page-faq .faq-group__body {
    padding-left: 12px;
  }

  .page-faq .latency-row {
    grid-template-columns: 64px minmax(0, 1fr) 56px;
    gap: 10px;
  }

  .page-faq .latency-row__value {
    font-size: 17px;
  }

  .page-faq .faq-quick__panel {
    padding: 19px 18px 17px;
  }

  .page-faq .faq-outro__panel {
    padding: 22px 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-quick__panel,
  .page-faq .faq-group__caret::before,
  .page-faq .faq-group__no,
  .page-faq .faq-group__body {
    transition: none;
  }

  .page-faq .faq-quick__panel:hover,
  .page-faq .faq-quick__panel:focus-visible {
    transform: none;
  }
}