.page-faq {
  --faq-rail: 232px;
  --faq-line: rgba(46, 74, 125, 0.75);
}

.page-faq .breadcrumb ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  font-size: 13px;
}

.page-faq .breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--line);
}

.page-faq .breadcrumb a {
  color: var(--muted);
  text-decoration: none;
}

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

.page-faq .breadcrumb [aria-current="page"] {
  color: var(--ink);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  display: grid;
  gap: 26px;
  margin-top: 18px;
  padding: 26px 0 40px;
  background:
    radial-gradient(120% 130% at 92% 0%, rgba(0, 229, 255, 0.13), transparent 58%),
    radial-gradient(90% 120% at 2% 100%, rgba(255, 45, 120, 0.1), transparent 62%);
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(32px, 7.4vw, 58px);
  line-height: 1.08;
  letter-spacing: 0.01em;
  margin: 14px 0 0;
  max-width: 15em;
}

.page-faq .faq-hero .lede {
  margin: 18px 0 0;
  max-width: 34em;
  color: var(--muted);
}

.page-faq .faq-hero .kicker {
  color: var(--cyan);
}

.page-faq .faq-hero__media {
  position: relative;
  margin: 0;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

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

.page-faq .faq-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0, 229, 255, 0.16), rgba(255, 45, 120, 0.12) 58%, transparent);
  pointer-events: none;
}

/* ---------- 搜索行 ---------- */
.page-faq .faq-search {
  position: relative;
  margin-top: 28px;
  max-width: 460px;
}

.page-faq .faq-search::before {
  content: "";
  position: absolute;
  left: 17px;
  top: 50%;
  width: 11px;
  height: 11px;
  margin-top: -7px;
  border: 1.5px solid var(--cyan);
  border-radius: 50%;
}

.page-faq .faq-search::after {
  content: "";
  position: absolute;
  left: 28px;
  top: 50%;
  width: 7px;
  height: 1.5px;
  background: var(--cyan);
  transform: rotate(45deg);
  transform-origin: left center;
}

.page-faq .faq-search input {
  width: 100%;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--ink);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 0;
  padding: 13px 16px 13px 44px;
  -webkit-appearance: none;
  appearance: none;
}

.page-faq .faq-search input::placeholder {
  color: var(--muted);
  letter-spacing: 0.03em;
}

.page-faq .faq-search input:focus {
  outline: none;
  border-color: var(--cyan);
  box-shadow: inset 0 0 0 1px var(--cyan);
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: 34px;
  padding-top: 34px;
}

/* ---------- 分组轨道 ---------- */
.page-faq .faq-rail__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--muted);
  text-transform: uppercase;
}

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

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

.page-faq .faq-rail__link {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 9px 12px;
  white-space: nowrap;
  font-size: 14px;
  color: var(--muted);
  text-decoration: none;
  border-left: 2px solid transparent;
  background: rgba(20, 41, 79, 0.4);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  color: var(--ink);
  border-left-color: var(--cyan);
  background: rgba(0, 229, 255, 0.08);
}

.page-faq .faq-rail__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan);
}

/* ---------- 分组面板 ---------- */
.page-faq .faq-group {
  scroll-margin-top: 24px;
}

.page-faq .faq-group + .faq-group {
  margin-top: 48px;
  padding-top: 40px;
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-group__head {
  display: flex;
  align-items: center;
  gap: 14px;
}

.page-faq .faq-group__head::after {
  content: "";
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--line), transparent);
}

.page-faq .faq-group__num {
  font-family: var(--font-mono);
  font-size: 32px;
  line-height: 1;
  color: var(--gold);
  letter-spacing: -0.03em;
}

.page-faq .faq-group__head h2 {
  font-family: var(--font-display);
  font-size: clamp(23px, 4.4vw, 32px);
  letter-spacing: 0.05em;
  margin: 0;
}

.page-faq .faq-group__note {
  margin: 12px 0 20px;
  font-size: 14px;
  color: var(--muted);
  max-width: 42em;
}

/* ---------- 问题折叠面板 ---------- */
.page-faq .qa {
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .qa summary {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 18px 0;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
}

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

.page-faq .qa summary:hover {
  color: var(--cyan);
}

.page-faq .qa summary:focus-visible {
  outline: none;
  box-shadow: inset 3px 0 0 var(--cyan);
  padding-left: 10px;
}

.page-faq .qa__idx {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  color: var(--cyan);
  flex: none;
}

.page-faq .qa summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 19px;
  line-height: 1;
  color: var(--magenta);
  transition: transform 240ms ease, color 240ms ease;
}

.page-faq .qa[open] summary::after {
  transform: rotate(135deg);
  color: var(--cyan);
}

.page-faq .qa__body {
  max-width: 40em;
  padding: 0 0 20px;
  border-top: 1px solid transparent;
  transition: border-color 240ms ease, padding-top 240ms ease;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .qa[open] .qa__body {
  border-top-color: var(--cyan);
  padding-top: 14px;
}

.page-faq .qa__body p {
  margin: 0;
}

.page-faq .qa__body strong {
  color: var(--gold);
  font-weight: 600;
}

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

.page-faq .qa__body a:hover,
.page-faq .qa__body a:focus-visible {
  color: var(--magenta);
}

/* ---------- 内嵌图 ---------- */
.page-faq .faq-figure {
  margin: 26px 0;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-left: 3px solid var(--cyan);
}

.page-faq .faq-figure .media__cap {
  display: block;
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
  max-width: 40em;
}

/* ---------- 桌面端 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.6fr);
    align-items: end;
    gap: 46px;
    padding: 36px 0 56px;
  }

  .page-faq .faq-hero__text {
    padding-bottom: 6px;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-body {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: 56px;
    padding-top: 46px;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 32px;
    align-self: start;
    border-left: 1px solid var(--faq-line);
    padding-left: 2px;
  }

  .page-faq .faq-rail__title {
    padding-left: 14px;
  }

  .page-faq .faq-rail__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-rail__link {
    background: none;
    padding: 10px 14px;
  }

  .page-faq .qa summary {
    font-size: 16.5px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa summary::after,
  .page-faq .qa__body {
    transition: none;
  }
}