.page-faq {
  --faq-sticky: 96px;
  display: block;
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumb {
  padding-top: 20px;
  font-family: var(--ff-label);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--steel);
}
.page-faq .breadcrumb a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus-visible {
  color: var(--amber);
  border-bottom-color: var(--amber);
}
.page-faq .breadcrumb__sep {
  margin: 0 8px;
  color: var(--steel);
}

/* ---------- 框景首屏 ---------- */
.page-faq .faq-hero {
  padding: 16px 0 8px;
}
.page-faq .faq-hero__frame {
  position: relative;
  padding: 32px 20px 26px;
  background: var(--ink-2);
  border: var(--line);
  box-shadow: var(--shadow);
}
.page-faq .faq-hero__frame::before {
  content: "";
  position: absolute;
  top: -2px;
  left: 22px;
  width: 84px;
  height: 4px;
  background: var(--amber);
}
.page-faq .faq-hero__frame .eyebrow {
  font-family: var(--ff-label);
  font-size: 13px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--amber);
  margin: 0;
}
.page-faq .faq-hero__frame h1 {
  font-family: var(--ff-display);
  font-weight: 700;
  font-size: 30px;
  line-height: 1.28;
  letter-spacing: -0.02em;
  color: var(--paper);
  margin: 14px 0 0;
}
.page-faq .faq-hero__frame .lede {
  margin: 16px 0 0;
  max-width: 46em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--mist);
}
.page-faq .faq-hero__facts {
  list-style: none;
  margin: 26px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--steel);
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  font-family: var(--ff-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--mist);
}
.page-faq .faq-hero__facts strong {
  color: var(--amber);
  font-weight: 600;
}

/* ---------- 主体栅格 ---------- */
.page-faq .faq-layout {
  padding: 34px 0 0;
}

/* ---------- 分组目录（移动端横向标签） ---------- */
.page-faq .faq-index {
  margin-bottom: 30px;
}
.page-faq .faq-index__title {
  margin: 0 0 10px;
  font-family: var(--ff-label);
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--steel);
}
.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}
.page-faq .faq-index__list::-webkit-scrollbar {
  height: 4px;
}
.page-faq .faq-index__list::-webkit-scrollbar-thumb {
  background: var(--ink-2);
}
.page-faq .faq-index__link {
  display: block;
  white-space: nowrap;
  padding: 11px 14px;
  min-height: 44px;
  background: var(--ink-2);
  border: 2px solid var(--edge);
  color: var(--mist);
  font-family: var(--ff-label);
  font-size: 14px;
  letter-spacing: 0.08em;
  text-decoration: none;
  transition: color 200ms ease, border-color 200ms ease;
}
.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--paper);
  border-color: var(--amber);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: var(--faq-sticky);
}
.page-faq .faq-group + .faq-group {
  margin-top: 52px;
}
.page-faq .faq-group__head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--ink-2);
  margin-bottom: 18px;
}
.page-faq .faq-group__dot {
  flex: none;
  width: 9px;
  height: 9px;
  background: var(--ember);
  opacity: 0;
  transition: opacity 200ms ease;
}
.page-faq .faq-group:target .faq-group__dot {
  opacity: 1;
}
.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--ff-display);
  font-weight: 700;
  font-size: 23px;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--paper);
}
.page-faq .faq-group__lede {
  margin: 0 0 20px;
  color: var(--mist);
  font-size: 16px;
  line-height: 1.85;
}

/* ---------- 问答折叠 ---------- */
.page-faq .qa {
  background: var(--ink-2);
  border: 2px solid var(--edge);
  border-left: 3px solid var(--steel);
  box-shadow: 4px 4px 0 var(--edge);
  margin: 0 0 14px;
  transition: border-left-color 200ms ease;
}
.page-faq .qa[open] {
  border-left-color: var(--ember);
}
.page-faq .qa__q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 16px 16px 18px;
  min-height: 44px;
  cursor: pointer;
  list-style: none;
  color: var(--paper);
  font-size: 16px;
  line-height: 1.55;
}
.page-faq .qa__q::-webkit-details-marker {
  display: none;
}
.page-faq .qa__q:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: -2px;
}
.page-faq .qa__num {
  flex: none;
  padding-top: 3px;
  font-family: var(--ff-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--steel);
  transition: color 200ms ease;
}
.page-faq .qa[open] .qa__num {
  color: var(--amber);
}
.page-faq .qa__text {
  flex: 1 1 auto;
}
.page-faq .qa__sign {
  position: relative;
  flex: none;
  width: 16px;
  height: 16px;
  margin-top: 5px;
}
.page-faq .qa__sign::before,
.page-faq .qa__sign::after {
  content: "";
  position: absolute;
  background: var(--amber);
}
.page-faq .qa__sign::before {
  left: 0;
  top: 7px;
  width: 16px;
  height: 2px;
}
.page-faq .qa__sign::after {
  left: 7px;
  top: 0;
  width: 2px;
  height: 16px;
  transition: transform 200ms ease;
}
.page-faq .qa[open] .qa__sign::after {
  transform: scaleY(0);
}
.page-faq .qa__a {
  padding: 0 18px 18px;
  border-top: 1px solid var(--edge);
  padding-top: 14px;
}
.page-faq .qa__a p {
  margin: 0;
  color: var(--mist);
  font-size: 16px;
  line-height: 1.85;
}

/* ---------- 步骤链 ---------- */
.page-faq .steps {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-faq .step {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 14px;
  padding: 20px 0;
  border-bottom: 1px dashed var(--steel);
}
.page-faq .step:first-child {
  border-top: 1px dashed var(--steel);
}
.page-faq .step__num {
  font-family: var(--ff-display);
  font-weight: 700;
  font-size: 32px;
  line-height: 1;
  color: var(--amber);
  font-variant-numeric: tabular-nums;
}
.page-faq .step__title {
  margin: 2px 0 8px;
  font-family: var(--ff-body);
  font-size: 17px;
  font-weight: 600;
  color: var(--paper);
}
.page-faq .step__text {
  margin: 0;
  color: var(--mist);
  font-size: 16px;
  line-height: 1.85;
}
.page-faq .step__done {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--jade);
}

/* ---------- 提示带 ---------- */
.page-faq .faq-tip {
  margin: 34px 0;
  padding: 18px 20px;
  background: var(--ink-2);
  border-left: 4px solid var(--amber);
  color: var(--paper);
  font-size: 16px;
  line-height: 1.8;
}
.page-faq .faq-tip--stack {
  margin-bottom: 0;
}
.page-faq .faq-tip p {
  margin: 0;
}
.page-faq .faq-tip__flow {
  display: block;
  margin-bottom: 6px;
  font-family: var(--ff-mono);
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--amber);
}
.page-faq .faq-tip a {
  color: var(--amber);
  text-decoration: none;
  border-bottom: 1px solid var(--amber);
}
.page-faq .faq-tip a:hover,
.page-faq .faq-tip a:focus-visible {
  color: var(--paper);
  border-bottom-color: var(--paper);
}

/* ---------- 图片 ---------- */
.page-faq .faq-figure {
  margin: 22px 0 30px;
}
.page-faq .faq-figure .media__caption {
  font-size: 13px;
  color: var(--steel);
}
.page-faq .media img {
  max-width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

/* ---------- 奶油纸求助面板 ---------- */
.page-faq .faq-help {
  padding: 26px 20px 24px;
  background: var(--cream);
  color: var(--brown);
  border: 2px solid var(--edge);
  box-shadow: var(--shadow);
}
.page-faq .faq-help h3 {
  margin: 0 0 10px;
  font-family: var(--ff-display);
  font-weight: 700;
  font-size: 21px;
  line-height: 1.35;
  color: var(--brown);
}
.page-faq .faq-help__lede {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.8;
}
.page-faq .faq-help__list {
  margin: 0 0 18px;
  padding-left: 20px;
}
.page-faq .faq-help__list li {
  font-size: 15px;
  line-height: 1.85;
}
.page-faq .faq-help__note {
  margin: 0 0 20px;
  padding-top: 14px;
  border-top: 1px solid var(--brown);
  font-size: 14px;
  line-height: 1.8;
}
.page-faq .faq-help__actions {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 中等宽度 ---------- */
@media (min-width: 620px) {
  .page-faq .faq-hero__frame {
    padding: 40px 32px 32px;
  }
  .page-faq .faq-hero__frame h1 {
    font-size: 36px;
  }
  .page-faq .qa__q {
    padding: 18px 20px 18px 22px;
    font-size: 17px;
  }
  .page-faq .qa__a {
    padding: 16px 22px 20px 62px;
  }
  .page-faq .faq-help {
    padding: 32px 30px 30px;
  }
}

/* ---------- 桌面端：侧栏目录 + 内容 ---------- */
@media (min-width: 1024px) {
  .page-faq .faq-layout {
    display: grid;
    grid-template-columns: 236px minmax(0, 1fr);
    gap: 56px;
    padding-top: 46px;
  }
  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--bar-h) + 28px);
    align-self: start;
    margin-bottom: 0;
  }
  .page-faq .faq-index__list {
    display: block;
    overflow: visible;
    padding-bottom: 0;
    border-left: 1px solid var(--ink-2);
  }
  .page-faq .faq-index__list li + li {
    margin-top: 2px;
  }
  .page-faq .faq-index__link {
    display: flex;
    align-items: center;
    gap: 12px;
    min-height: 44px;
    padding: 12px 12px 12px 14px;
    background: transparent;
    border: 0;
    border-left: 2px solid transparent;
    white-space: normal;
    color: var(--steel);
    letter-spacing: 0.06em;
  }
  .page-faq .faq-index__link::before {
    content: "";
    flex: none;
    width: 12px;
    height: 2px;
    background: var(--steel);
    transition: width 200ms ease, background 200ms ease;
  }
  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    color: var(--paper);
    border-left-color: var(--amber);
  }
  .page-faq .faq-index__link:hover::before,
  .page-faq .faq-index__link:focus-visible::before {
    width: 22px;
    background: var(--amber);
  }
  .page-faq .faq-group__title {
    font-size: 27px;
  }
  .page-faq .faq-group + .faq-group {
    margin-top: 64px;
  }
  .page-faq .faq-help {
    padding: 38px 40px 34px;
  }
  .page-faq .faq-help h3 {
    font-size: 24px;
  }
  .page-faq .faq-hero__frame h1 {
    font-size: 40px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .qa__num,
  .page-faq .qa__sign::after,
  .page-faq .faq-group__dot,
  .page-faq .faq-index__link,
  .page-faq .faq-index__link::before {
    transition: none;
  }
}
</main>