.page-faq {
  --faq-gap: 26px;
  --faq-radius: 16px;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  padding: 20px 16px 0;
  overflow-x: hidden;
}

.page-faq .breadcrumb {
  max-width: var(--shell-max);
  margin: 0 auto 16px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  max-width: var(--shell-max);
  margin: 0 auto 34px;
  padding: 34px 20px 32px;
  border-radius: var(--faq-radius);
  background: linear-gradient(158deg, var(--blue) 0%, #16406F 58%, var(--deep) 100%);
  color: var(--glaze);
  display: grid;
  gap: 24px;
  overflow: hidden;
}

.page-faq .faq-hero__scale {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 5px;
  background: repeating-linear-gradient(90deg, var(--brass) 0 12px, transparent 12px 26px);
  opacity: .6;
}

.page-faq .faq-hero__text {
  position: relative;
  z-index: 1;
  min-width: 0;
}

.page-faq .faq-hero .kicker {
  color: var(--brass-soft);
  margin: 0 0 6px;
}

.page-faq .faq-hero h1 {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(27px, 5.4vw, 44px);
  line-height: 1.22;
  letter-spacing: .01em;
  margin: 8px 0 14px;
  color: var(--glaze);
}

.page-faq .faq-hero__lede {
  margin: 0;
  font-size: 16px;
  line-height: 1.9;
  color: #D6E2F2;
  max-width: 54ch;
}

.page-faq .faq-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero__stat {
  border: 1px solid rgba(231, 211, 163, .45);
  border-radius: 999px;
  padding: 5px 13px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--brass-soft);
  white-space: nowrap;
}

.page-faq .faq-hero__art {
  margin: 0;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid rgba(231, 211, 163, .3);
  background: rgba(12, 31, 51, .4);
}

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

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  max-width: var(--shell-max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
  align-items: start;
}

/* 分类轨道 */
.page-faq .faq-rail {
  border-top: 2px solid var(--brass);
  padding-top: 12px;
  min-width: 0;
}

.page-faq .faq-rail__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--gray);
  text-transform: uppercase;
}

.page-faq .faq-rail__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-faq .faq-rail__item {
  flex: none;
}

.page-faq .faq-rail__link {
  display: flex;
  align-items: center;
  gap: 9px;
  white-space: nowrap;
  padding: 8px 14px;
  border: 1px solid var(--pale);
  border-radius: 999px;
  background: var(--glaze);
  color: var(--ink);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.4;
  transition: border-color .2s var(--ease), background-color .2s var(--ease), color .2s var(--ease);
}

.page-faq .faq-rail__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--brass);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  border-color: var(--brass);
  background: var(--brass-soft);
  color: var(--deep);
  outline: none;
}

/* ---------- 问题分组 ---------- */
.page-faq .faq-list {
  min-width: 0;
}

.page-faq .faq-group {
  scroll-margin-top: calc(var(--bar-h) + 20px);
  margin-bottom: 44px;
}

.page-faq .faq-group--last {
  margin-bottom: 8px;
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  border-bottom: 2px solid var(--blue);
  padding-bottom: 12px;
  margin-bottom: 0;
}

.page-faq .faq-group__num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--brass);
  flex: none;
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 21px;
  line-height: 1.35;
  letter-spacing: .01em;
  color: var(--deep);
}

.page-faq .faq-group__note {
  margin: 12px 0 16px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--gray);
}

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

.page-faq .faq-group__note a:hover {
  color: var(--neon);
}

/* 示意图 */
.page-faq .faq-figure {
  margin: 0 0 18px;
  border: 1px solid var(--pale);
  border-radius: 12px;
  overflow: hidden;
  background: var(--glaze);
}

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

.page-faq .faq-figure figcaption {
  padding: 11px 15px;
  border-top: 1px solid var(--pale);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .05em;
  line-height: 1.6;
  color: var(--gray);
}

/* ---------- 问答条目 ---------- */
.page-faq .qa {
  border-bottom: 1px solid var(--pale);
  background: transparent;
  border-left: 4px solid transparent;
  transition: background-color .2s var(--ease), border-color .2s var(--ease), box-shadow .2s var(--ease);
}

.page-faq .qa[open] {
  background: var(--glaze);
  border-left-color: var(--brass);
  border-radius: 0 12px 12px 0;
  box-shadow: 0 10px 26px rgba(12, 31, 51, .07);
}

.page-faq .qa__q {
  display: flex;
  align-items: flex-start;
  gap: 11px;
  padding: 17px 10px 17px 6px;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.62;
  color: var(--ink);
  transition: color .2s var(--ease);
}

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

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

.page-faq .qa__q:hover {
  color: var(--blue);
}

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

.page-faq .qa__q::after {
  content: "+";
  margin-left: auto;
  flex: none;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1.1;
  color: var(--brass);
}

.page-faq .qa[open] .qa__q::after {
  content: "−";
}

.page-faq .qa__idx {
  flex: none;
  margin-top: 3px;
  padding: 2px 7px;
  border-radius: 4px;
  background: var(--brass-soft);
  color: #6B4A12;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
}

.page-faq .qa__a {
  padding: 0 14px 20px 6px;
}

.page-faq .qa__a p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.9;
  color: #33414F;
}

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

.page-faq .qa__a a:hover {
  color: var(--neon);
}

/* ---------- 收束求助区 ---------- */
.page-faq .faq-help {
  margin-top: 22px;
  background: var(--deep);
  color: var(--glaze);
  border-top: 3px solid var(--brass);
  padding: 40px 16px 56px;
}

.page-faq .faq-help__inner {
  max-width: var(--shell-max);
  margin: 0 auto;
}

.page-faq .faq-help .kicker {
  color: var(--brass-soft);
  margin: 0 0 8px;
}

.page-faq .faq-help__title {
  margin: 0 0 12px;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(22px, 4.2vw, 32px);
  line-height: 1.3;
  color: var(--glaze);
}

.page-faq .faq-help__text {
  margin: 0 0 22px;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.9;
  color: #C6D4E6;
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 0;
}

/* ---------- 中等屏幕 ---------- */
@media (min-width: 720px) {
  .page-faq {
    padding: 26px 24px 0;
  }

  .page-faq .faq-hero {
    padding: 44px 34px 40px;
  }

  .page-faq .faq-group__title {
    font-size: 26px;
  }

  .page-faq .qa__a {
    padding-left: 48px;
    padding-right: 22px;
  }

  .page-faq .qa__q {
    padding-left: 10px;
  }

  .page-faq .faq-help {
    padding: 52px 24px 66px;
  }
}

/* ---------- 桌面端：左侧轨道 + 右侧长列表 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, .9fr);
    align-items: center;
    gap: 36px;
    padding: 52px 44px;
  }

  .page-faq .faq-body {
    grid-template-columns: 208px minmax(0, 1fr);
    gap: 46px;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--bar-h) + 20px);
    border-top: 2px solid var(--brass);
    padding-top: 14px;
  }

  .page-faq .faq-rail__list {
    display: block;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-rail__item + .faq-rail__item {
    border-top: 1px solid var(--pale);
  }

  .page-faq .faq-rail__link {
    border: 0;
    border-left: 3px solid transparent;
    border-radius: 0;
    background: transparent;
    padding: 12px 12px 12px 11px;
    width: 100%;
  }

  .page-faq .faq-rail__link:hover,
  .page-faq .faq-rail__link:focus-visible {
    border-left-color: var(--brass);
    background: rgba(29, 78, 137, .07);
    color: var(--deep);
  }
}