.page-faq {
  --faq-index-w: 264px;
  display: block;
}

/* ---------- 面包屑 ---------- */
.page-faq .faq-crumb {
  padding-top: clamp(18px, 3.5vw, 34px);
}

.page-faq .faq-crumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
}

.page-faq .faq-crumb__link {
  color: var(--line);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
  transition: color var(--ease), border-color var(--ease);
}

.page-faq .faq-crumb__link:hover,
.page-faq .faq-crumb__link:focus-visible {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.page-faq .faq-crumb__link[aria-current="page"] {
  color: var(--text-strong);
  border-bottom-color: var(--line-soft);
}

.page-faq .faq-crumb__sep {
  color: var(--line-faint);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-intro {
  padding-top: clamp(30px, 5vw, 58px);
  padding-bottom: clamp(32px, 5vw, 64px);
}

.page-faq .faq-intro__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 48px);
  align-items: center;
}

.page-faq .faq-intro__title {
  margin: 14px 0 0;
  font-size: clamp(32px, 6.6vw, 58px);
  line-height: 1.08;
  letter-spacing: -.025em;
  font-weight: 800;
  color: var(--text-strong);
  max-width: 16ch;
}

.page-faq .faq-intro__lede {
  margin-top: 18px;
  max-width: 46ch;
}

.page-faq .faq-intro__figure {
  margin: 0;
  position: relative;
}

.page-faq .media-frame.faq-intro__frame {
  position: relative;
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
}

.page-faq .faq-intro__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(.7) contrast(1.06) brightness(.94);
}

.page-faq .faq-intro__frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    repeating-linear-gradient(0deg, rgba(67, 96, 124, .18) 0 1px, transparent 1px 36px),
    repeating-linear-gradient(90deg, rgba(67, 96, 124, .12) 0 1px, transparent 1px 36px),
    linear-gradient(140deg, rgba(77, 240, 140, .14), rgba(7, 12, 24, .55) 62%);
}

.page-faq .media-frame__label {
  position: absolute;
  left: 0;
  bottom: 0;
  z-index: 2;
  padding: 6px 14px;
  background: rgba(7, 12, 24, .84);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
}

.page-faq .faq-intro__figure .media-frame__caption,
.page-faq .faq-trouble__figure .media-frame__caption {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--line);
}

/* ---------- 双栏主体 ---------- */
.page-faq .faq-body {
  padding-top: clamp(8px, 2vw, 20px);
  padding-bottom: clamp(56px, 8vw, 96px);
}

.page-faq .faq-shell {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 44px);
}

/* 左侧问题索引 */
.page-faq .faq-index {
  border-top: 2px solid var(--accent);
  padding-top: 16px;
}

.page-faq .faq-index__list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-index__link {
  display: grid;
  grid-template-columns: 2.6em minmax(0, 1fr);
  gap: 8px;
  align-items: baseline;
  padding: 11px 8px 11px 12px;
  color: var(--text);
  font-size: 14.5px;
  line-height: 1.4;
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color var(--ease), border-color var(--ease), background var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--text-strong);
  border-left-color: var(--accent);
  background: var(--accent-soft);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--line);
  transition: color var(--ease);
}

.page-faq .faq-index__link:hover .faq-index__num,
.page-faq .faq-index__link:focus-visible .faq-index__num {
  color: var(--accent);
}

/* 右侧答案区 */
.page-faq .faq-answers {
  display: grid;
  gap: clamp(34px, 5vw, 56px);
  min-width: 0;
}

.page-faq .faq-group {
  min-width: 0;
  scroll-margin-top: 96px;
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 2px 14px;
  align-items: baseline;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-group__num {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--accent);
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(21px, 3vw, 29px);
  line-height: 1.25;
  letter-spacing: -.01em;
  color: var(--text-strong);
}

.page-faq .faq-group__note {
  grid-column: 2;
  margin: 7px 0 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--line);
}

/* 折叠问答 */
.page-faq .faq-item {
  border-bottom: 1px solid var(--line-faint);
  border-left: 2px solid transparent;
  padding-left: clamp(12px, 2vw, 18px);
  transition: border-color var(--ease), background var(--ease);
}

.page-faq .faq-item[open] {
  border-left-color: var(--accent);
  background: linear-gradient(90deg, var(--accent-soft) 0%, rgba(77, 240, 140, 0) 55%);
}

.page-faq .faq-item__q {
  position: relative;
  display: block;
  padding: 18px 42px 18px 0;
  cursor: pointer;
  font-size: clamp(15.5px, 2vw, 18px);
  font-weight: 600;
  line-height: 1.55;
  color: var(--text-strong);
  list-style: none;
  transition: color var(--ease);
}

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

.page-faq .faq-item__q::marker {
  content: "";
}

.page-faq .faq-item__q:hover {
  color: var(--accent);
}

.page-faq .faq-item__q::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: 50%;
  width: 24px;
  transform: translateY(-50%);
  text-align: center;
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  line-height: 1;
  color: var(--line);
  transition: color var(--ease);
}

.page-faq .faq-item[open] .faq-item__q::after {
  content: "–";
  color: var(--accent);
}

.page-faq .faq-item__q:hover::after {
  color: var(--accent);
}

.page-faq .faq-item__a {
  padding: 0 10px 22px 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--text);
}

.page-faq .faq-item__a p {
  margin: 0;
  max-width: 62ch;
}

.page-faq .faq-item__a a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid var(--accent-soft);
  transition: border-color var(--ease);
}

.page-faq .faq-item__a a:hover,
.page-faq .faq-item__a a:focus-visible {
  border-bottom-color: var(--accent);
}

/* ---------- 排查步骤 ---------- */
.page-faq .faq-trouble {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 40px);
  margin-top: 22px;
}

.page-faq .faq-steps {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-steps__item {
  position: relative;
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 14px;
  padding-bottom: 22px;
}

.page-faq .faq-steps__item::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 34px;
  bottom: 2px;
  width: 1px;
  background: linear-gradient(180deg, var(--accent), rgba(77, 240, 140, 0) 88%);
}

.page-faq .faq-steps__item:last-child {
  padding-bottom: 0;
}

.page-faq .faq-steps__item:last-child::before {
  display: none;
}

.page-faq .faq-steps__num {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  justify-self: start;
  width: 30px;
  height: 30px;
  border: 1px solid var(--line-soft);
  background: var(--panel);
  color: var(--pulse);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .04em;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 7px), calc(100% - 7px) 100%, 0 100%);
}

.page-faq .faq-steps__title {
  margin: 4px 0 6px;
  font-size: 15.5px;
  font-weight: 600;
  color: var(--text-strong);
}

.page-faq .faq-steps__text {
  margin: 0;
  max-width: 58ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--text);
}

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

.page-faq .media-frame.faq-trouble__frame {
  position: relative;
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 18px 100%, 0 calc(100% - 18px));
}

.page-faq .faq-trouble__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 5 / 6;
  object-fit: cover;
  filter: saturate(.68) contrast(1.08) brightness(.92);
}

.page-faq .faq-trouble__frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    repeating-linear-gradient(0deg, rgba(67, 96, 124, .18) 0 1px, transparent 1px 30px),
    linear-gradient(200deg, rgba(255, 156, 66, .12), rgba(7, 12, 24, .5) 70%);
}

/* ---------- 联系方式 ---------- */
.page-faq .faq-help {
  margin-top: 22px;
  padding: 4px 0 4px clamp(14px, 2.4vw, 22px);
  border-left: 2px solid var(--pulse);
}

.page-faq .faq-help__meta {
  display: grid;
  gap: 0;
  margin: 0;
}

.page-faq .faq-help__row {
  display: grid;
  grid-template-columns: 5.5em minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding: 10px 0;
  border-bottom: 1px solid var(--line-faint);
}

.page-faq .faq-help__key {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--line);
}

.page-faq .faq-help__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--text-strong);
  word-break: break-all;
}

.page-faq .faq-help__text {
  margin: 18px 0 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text);
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

/* ---------- 焦点反馈 ---------- */
.page-faq .faq-crumb__link:focus-visible,
.page-faq .faq-index__link:focus-visible,
.page-faq .faq-item__q:focus-visible,
.page-faq .faq-help__actions .btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ---------- 响应式 ---------- */
@media (max-width: 899px) {
  .page-faq .faq-index__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-index__link {
    grid-template-columns: 2.2em minmax(0, 1fr);
    font-size: 13.5px;
    padding: 9px 6px 9px 10px;
  }
}

@media (min-width: 720px) {
  .page-faq .faq-trouble {
    grid-template-columns: minmax(0, 1fr) minmax(190px, 250px);
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-shell {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    align-items: start;
    gap: clamp(28px, 4vw, 56px);
  }

  .page-faq .faq-index {
    position: sticky;
    top: 96px;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-intro__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
    gap: clamp(36px, 4vw, 60px);
  }

  .page-faq .faq-intro__title {
    max-width: 15ch;
  }
}