.page-faq {
  --faq-panel-bg: linear-gradient(180deg, rgba(12, 20, 29, .78), rgba(7, 12, 19, .78));
  --faq-rule-dash: rgba(140, 166, 190, .28);
  padding-top: 20px;
  padding-bottom: 12px;
}

.page-faq .breadcrumb {
  margin-bottom: 6px;
}

/* ---------- 首屏 ---------- */
.faq-hero {
  display: grid;
  gap: 28px;
  align-items: center;
  padding: 20px 0 34px;
}

.faq-hero__title,
.page-faq h1 {
  margin: 12px 0 0;
  font-size: clamp(30px, 5.4vw, 58px);
  line-height: 1.06;
  letter-spacing: -.01em;
  color: var(--silver-100);
  font-weight: 800;
}

.faq-hero .lede {
  margin-top: 16px;
  max-width: 56ch;
  color: var(--silver-300);
  font-size: 15px;
  line-height: 1.85;
}

.faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.faq-hero__media {
  margin: 0;
}

.page-faq .media {
  border: 1px solid var(--line);
  border-radius: var(--radius-sharp);
  overflow: hidden;
  background: var(--ink-800);
}

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

.page-faq .media__caption {
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--muted);
}

/* ---------- 数据带 ---------- */
.faq-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-bottom: 4px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sharp);
  background: var(--line);
  overflow: hidden;
}

.faq-stats__cell {
  padding: 16px 16px 18px;
  background: linear-gradient(180deg, var(--ink-900), var(--ink-950));
}

.faq-stats__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 600;
  color: var(--cyan);
  letter-spacing: .02em;
}

.faq-stats__label {
  margin: 6px 0 0;
  font-size: 12px;
  color: var(--muted);
}

/* ---------- 索引条 ---------- */
.faq-index {
  display: flex;
  gap: 8px;
  margin-top: 22px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.faq-index__link {
  flex: 0 0 auto;
  padding: 8px 14px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sharp);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--silver-300);
  text-decoration: none;
  white-space: nowrap;
  transition: color .2s ease, background-color .2s ease, border-color .2s ease;
}

.faq-index__link:hover,
.faq-index__link:focus-visible {
  color: var(--ink-950);
  background: var(--cyan);
  border-color: var(--cyan);
}

/* ---------- 分组 ---------- */
.faq-body {
  padding-bottom: 8px;
}

.faq-cat {
  display: grid;
  gap: 20px;
  padding: 34px 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: calc(var(--header-offset) + 12px);
}

.faq-cat:first-child {
  border-top: 0;
}

.faq-cat__num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--cyan);
}

.faq-cat__title {
  margin: 10px 0 8px;
  font-size: 19px;
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--silver-100);
}

.faq-cat__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 折叠问答 ---------- */
.page-faq .accordion__item {
  margin-bottom: 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sharp);
  background: var(--faq-panel-bg);
  transition: border-color .2s ease;
}

.page-faq .accordion__item:hover {
  border-color: var(--line-strong);
}

.page-faq .accordion__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 15px 16px;
  border: 0;
  background: transparent;
  color: var(--silver-100);
  font: inherit;
  font-size: 15px;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  transition: color .2s ease;
}

.page-faq .accordion__trigger:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

.page-faq .accordion__trigger[aria-expanded="true"] {
  color: var(--cyan);
}

.page-faq .accordion__icon {
  position: relative;
  flex: 0 0 auto;
  width: 14px;
  height: 14px;
  color: currentColor;
}

.page-faq .accordion__icon::before,
.page-faq .accordion__icon::after {
  content: "";
  position: absolute;
  background: currentColor;
}

.page-faq .accordion__icon::before {
  top: 6px;
  left: 0;
  width: 14px;
  height: 2px;
}

.page-faq .accordion__icon::after {
  top: 0;
  left: 6px;
  width: 2px;
  height: 14px;
  transition: transform .2s ease;
}

.page-faq .accordion__trigger[aria-expanded="true"] .accordion__icon::after {
  transform: scaleY(0);
}

.page-faq .accordion__panel {
  padding: 0 16px 16px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--silver-300);
}

.page-faq .accordion__panel p {
  margin: 0 0 10px;
}

.page-faq .accordion__panel p:last-child {
  margin-bottom: 0;
}

.page-faq .accordion__panel a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .accordion__panel a:hover {
  color: var(--silver-100);
}

.faq-figure {
  margin: 20px 0 0;
}

/* ---------- 联系 ---------- */
.faq-contact {
  margin-top: 8px;
  margin-bottom: 56px;
}

.faq-contact__inner {
  position: relative;
  display: grid;
  gap: 22px;
  padding: 26px 20px 28px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sharp);
  background: linear-gradient(135deg, var(--blue-900), var(--ink-900) 58%);
  overflow: hidden;
}

.faq-contact__inner::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 120px;
  height: 4px;
  background: linear-gradient(90deg, var(--cyan), var(--flame));
}

.faq-contact__lead .faq-cat__title {
  margin-top: 8px;
}

.faq-contact__list {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.faq-contact__item {
  display: grid;
  gap: 6px;
  padding: 14px 0;
  border-top: 1px dashed var(--faq-rule-dash);
}

.faq-contact__key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--cyan);
}

.faq-contact__val {
  font-size: 15px;
  color: var(--silver-100);
  word-break: break-word;
}

.faq-contact__val a {
  color: var(--silver-100);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
}

.faq-contact__val a:hover {
  color: var(--cyan);
  border-color: var(--cyan-line);
}

.faq-contact__action {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 桌面 ---------- */
@media (min-width: 760px) {
  .faq-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .faq-stats__cell {
    padding: 18px 20px 20px;
  }

  .faq-contact__inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 40px;
    padding: 34px 34px 36px;
  }

  .faq-contact__action {
    grid-column: 1 / -1;
  }
}

@media (min-width: 960px) {
  .page-faq {
    padding-top: 28px;
  }

  .faq-hero {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
    gap: 56px;
    padding: 34px 0 52px;
  }

  .faq-cat {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: 52px;
    padding: 48px 0;
  }

  .faq-cat__head {
    position: sticky;
    top: calc(var(--header-offset) + 24px);
    align-self: start;
  }

  .faq-cat__title {
    font-size: 21px;
  }

  .page-faq .accordion__trigger {
    padding: 17px 20px;
    font-size: 15.5px;
  }

  .page-faq .accordion__panel {
    padding: 0 20px 18px;
    max-width: 68ch;
  }

  .faq-contact {
    margin-bottom: 88px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .faq-index__link,
  .page-faq .accordion__item,
  .page-faq .accordion__trigger,
  .page-faq .accordion__icon::after {
    transition: none;
  }
}