/* ============================================================
   帮助中心 — /help-center/
   作用域：.page-faq
   ============================================================ */

.page-faq {
  --faq-rule: rgba(46, 76, 112, .55);
}

/* ---------- 页首 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(84px, 11vw, 130px) 0 clamp(30px, 4.5vw, 48px);
  overflow: hidden;
  background:
    radial-gradient(92% 74% at 94% -6%, rgba(37, 224, 200, .14), transparent 58%),
    radial-gradient(70% 60% at -6% 100%, rgba(255, 106, 43, .10), transparent 62%),
    var(--ink-900);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line) 22%, var(--line) 78%, transparent);
}

.page-faq .faq-hero .breadcrumb {
  position: relative;
  z-index: 1;
  margin-bottom: 26px;
}

.page-faq .faq-hero .eyebrow {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__title {
  position: relative;
  z-index: 1;
  margin: 14px 0 0;
  max-width: 24ch;
  font-size: clamp(29px, 5vw, 52px);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -.012em;
  color: var(--fg);
}

.page-faq .faq-hero__title em {
  font-style: normal;
  color: var(--cyan);
}

.page-faq .faq-hero__lede {
  position: relative;
  z-index: 1;
  margin: 20px 0 0;
  max-width: 62ch;
  color: var(--muted);
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.78;
}

.page-faq .faq-hero__visual {
  position: relative;
  z-index: 1;
  margin-top: clamp(30px, 4.2vw, 48px);
}

/* ---------- 主体布局 ---------- */
.page-faq .faq-main {
  padding: clamp(40px, 6vw, 72px) 0 clamp(56px, 8vw, 96px);
  background: var(--ink-900);
}

.page-faq .faq-layout {
  display: grid;
  gap: 28px;
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(0, 1fr) 196px;
    gap: 56px;
    align-items: start;
  }
}

/* ---------- 场景索引 ---------- */
.page-faq .faq-toc {
  order: -1;
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding: 2px 0 12px;
  scrollbar-width: none;
}

.page-faq .faq-toc::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-toc__caption {
  display: none;
}

.page-faq .faq-toc__list {
  display: flex;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-toc__link {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.4;
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-toc__link:hover,
.page-faq .faq-toc__link:focus-visible {
  color: var(--fg);
  border-color: var(--cyan);
}

.page-faq .faq-toc__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--cyan);
}

@media (min-width: 960px) {
  .page-faq .faq-toc {
    order: 0;
    position: sticky;
    top: calc(var(--bar-h) + 30px);
    display: block;
    overflow: visible;
    padding: 0;
  }

  .page-faq .faq-toc__caption {
    display: block;
    margin: 0 0 14px;
    font-size: 11px;
    letter-spacing: .16em;
    text-transform: uppercase;
    color: var(--muted);
  }

  .page-faq .faq-toc__list {
    flex-direction: column;
    gap: 0;
    border-left: 1px solid var(--line);
  }

  .page-faq .faq-toc__link {
    position: relative;
    border: 0;
    border-radius: 0;
    padding: 9px 0 9px 14px;
    min-height: 0;
    font-size: 13.5px;
  }

  .page-faq .faq-toc__link::before {
    content: "";
    position: absolute;
    left: -1px;
    top: 50%;
    width: 2px;
    height: 0;
    background: var(--cyan);
    transform: translateY(-50%);
    transition: height var(--dur) var(--ease);
  }

  .page-faq .faq-toc__link:hover::before,
  .page-faq .faq-toc__link:focus-visible::before {
    height: 62%;
  }
}

/* ---------- 场景分组 ---------- */
.page-faq .faq-scene {
  scroll-margin-top: calc(var(--bar-h) + 28px);
}

.page-faq .faq-scene + .faq-scene {
  margin-top: clamp(36px, 5vw, 56px);
}

.page-faq .faq-scene__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px 18px;
  align-items: start;
  margin-bottom: 18px;
}

.page-faq .faq-scene__num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.2vw, 34px);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: .02em;
  color: var(--cyan);
  opacity: .9;
}

.page-faq .faq-scene__title {
  margin: 0;
  font-size: clamp(19px, 2.2vw, 24px);
  font-weight: 800;
  letter-spacing: -.006em;
  color: var(--fg);
}

.page-faq .faq-scene__desc {
  margin: 8px 0 0;
  max-width: 58ch;
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.72;
}

/* ---------- 问答折叠 ---------- */
.page-faq .accordion {
  border-top: 1px solid var(--faq-rule);
}

.page-faq .accordion__item {
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .accordion__trigger {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  width: 100%;
  min-height: 44px;
  padding: 17px 0;
  background: transparent;
  border: 0;
  color: var(--fg);
  font-family: inherit;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.55;
  text-align: left;
  cursor: pointer;
  transition: color var(--dur) var(--ease);
}

.page-faq .accordion__trigger:hover,
.page-faq .accordion__trigger:focus-visible {
  color: var(--cyan);
}

.page-faq .faq-q__text {
  display: block;
}

.page-faq .faq-q__mark {
  flex: 0 0 auto;
  width: 13px;
  height: 13px;
  margin-top: 5px;
  background:
    linear-gradient(var(--cyan), var(--cyan)) 50% 50% / 13px 1.5px no-repeat,
    linear-gradient(var(--cyan), var(--cyan)) 50% 50% / 1.5px 13px no-repeat;
  transition: transform var(--dur) var(--ease);
}

.page-faq .accordion__trigger[aria-expanded="true"] .faq-q__mark {
  transform: rotate(45deg);
}

.page-faq .faq-a {
  margin: 0 0 20px 2px;
  padding: 2px 0 4px 16px;
  border-left: 3px solid var(--mint);
}

.page-faq .faq-a p {
  margin: 0;
  max-width: 68ch;
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.8;
}

.page-faq .faq-a p + p {
  margin-top: 10px;
}

/* ---------- 移动端资源配图 ---------- */
.page-faq .faq-figure {
  display: grid;
  gap: 16px;
  margin-top: clamp(24px, 3.4vw, 36px);
}

@media (min-width: 720px) {
  .page-faq .faq-figure {
    grid-template-columns: minmax(0, 220px) minmax(0, 1fr);
    align-items: center;
    gap: 26px;
  }
}

.page-faq .faq-figure__caption {
  margin: 0;
  max-width: 52ch;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.75;
}

/* ---------- 收尾引导 ---------- */
.page-faq .faq-help {
  display: grid;
  gap: 18px;
  margin-top: clamp(36px, 5vw, 56px);
  padding: 26px 24px;
  background: var(--ink-800);
  border: 1px solid var(--line);
  border-left: 3px solid var(--orange);
}

@media (min-width: 720px) {
  .page-faq .faq-help {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 32px;
  }
}

.page-faq .faq-help__title {
  margin: 0;
  font-size: 17px;
  font-weight: 800;
  color: var(--fg);
}

.page-faq .faq-help__text {
  margin: 8px 0 0;
  max-width: 58ch;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.75;
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 窄屏兜底 ---------- */
@media (max-width: 480px) {
  .page-faq .faq-hero {
    padding-top: 76px;
  }

  .page-faq .faq-hero__title {
    font-size: 26px;
    max-width: none;
  }

  .page-faq .accordion__trigger {
    font-size: 15px;
    gap: 12px;
  }

  .page-faq .faq-help {
    padding: 20px 18px;
  }

  .page-faq .faq-help__actions .btn {
    flex: 1 1 auto;
    justify-content: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-q__mark,
  .page-faq .faq-toc__link,
  .page-faq .accordion__trigger,
  .page-faq .faq-toc__link::before {
    transition: none;
  }
}