.page-faq {
  --faq-line: rgba(36, 28, 22, .16);
  --faq-line-strong: rgba(36, 28, 22, .32);
  --faq-muted: rgba(36, 28, 22, .68);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  background: var(--ink);
  padding: calc(var(--header-h) + 64px) 0 56px;
  border-bottom: 1px solid rgba(255, 255, 255, .14);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(rgba(255, 255, 255, .13) 1px, transparent 1px),
    radial-gradient(rgba(47, 111, 208, .45) 1px, transparent 1px);
  background-size: 46px 46px, 46px 46px;
  background-position: 0 0, 23px 23px;
  opacity: .55;
  pointer-events: none;
}

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

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

.page-faq .faq-hero .breadcrumbs__link {
  color: var(--haze);
}

.page-faq .faq-hero .breadcrumbs__link:hover {
  color: var(--flag-white);
}

.page-faq .faq-hero .breadcrumbs__current {
  color: rgba(255, 255, 255, .55);
}

.page-faq .faq-hero .eyebrow {
  margin: 26px 0 16px;
  color: var(--haze);
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.page-faq .faq-hero h1 {
  margin: 0;
  max-width: 20ch;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.75rem, 5.4vw, 3.25rem);
  line-height: 1.16;
  letter-spacing: -.02em;
  color: var(--flag-white);
}

.page-faq .faq-hero__lead {
  margin: 22px 0 0;
  max-width: 60ch;
  font-size: 1.0625rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, .78);
}

.page-faq .faq-hero__jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 30px;
}

.page-faq .faq-hero__jump a {
  display: inline-block;
  padding: 7px 14px;
  border: 1px solid rgba(255, 255, 255, .28);
  color: var(--flag-white);
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .06em;
  text-decoration: none;
  transition: background .24s var(--ease), border-color .24s var(--ease);
}

.page-faq .faq-hero__jump a:hover,
.page-faq .faq-hero__jump a:focus-visible {
  background: rgba(255, 255, 255, .12);
  border-color: rgba(255, 255, 255, .62);
}

/* ---------- 正文底 ---------- */
.page-faq .faq-body {
  background: var(--cream);
  color: var(--brown);
  padding: 56px 0 88px;
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: start;
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  margin: 0 0 54px;
}

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

.page-faq .faq-group__head {
  border-left: 4px solid var(--faq-flag, var(--haze));
  padding-left: 16px;
  margin-bottom: 20px;
}

.page-faq .faq-group__head h2 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.3rem, 2.8vw, 1.85rem);
  line-height: 1.22;
  letter-spacing: -.02em;
  color: var(--brown);
}

.page-faq .faq-group__head p {
  margin: 0;
  max-width: 48ch;
  font-size: .9375rem;
  line-height: 1.7;
  color: var(--faq-muted);
}

.page-faq .faq-group--search { --faq-flag: var(--flag-blue); }
.page-faq .faq-group--ticket { --faq-flag: var(--flag-red); }
.page-faq .faq-group--update { --faq-flag: var(--flag-green); }
.page-faq .faq-group--errata { --faq-flag: var(--flag-yellow); }
.page-faq .faq-group--alert  { --faq-flag: var(--ink-2); }
.page-faq .faq-group--reach  { --faq-flag: var(--haze); }

/* ---------- 问答列表 ---------- */
.page-faq .faq-list {
  border-top: 1px solid var(--faq-line);
}

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

.page-faq .faq-item > summary {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 16px 2px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-body);
  font-size: 1.0313rem;
  line-height: 1.6;
  color: var(--brown);
  transition: background .2s var(--ease);
}

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

.page-faq .faq-item > summary:hover,
.page-faq .faq-item > summary:focus-visible {
  background: rgba(36, 28, 22, .045);
}

.page-faq .faq-item > summary::after {
  content: "+";
  flex: 0 0 auto;
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 1rem;
  line-height: 1;
  color: var(--haze);
}

.page-faq .faq-item[open] > summary::after {
  content: "\2212";
}

.page-faq .faq-num {
  flex: 0 0 auto;
  padding-top: .22em;
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .08em;
  color: var(--haze);
}

.page-faq .faq-q {
  min-width: 0;
}

.page-faq .faq-answer {
  margin: 0 0 18px;
  padding: 18px 20px 18px 20px;
  background: var(--paper);
  border-left: 4px solid var(--faq-flag, var(--haze));
  font-size: .9375rem;
  line-height: 1.82;
  color: var(--brown);
}

.page-faq .faq-answer p {
  margin: 0 0 10px;
  max-width: 40em;
}

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

.page-faq .faq-answer__more {
  margin-top: 12px;
}

.page-faq .faq-answer .link-more {
  color: var(--brown);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-thickness: 1px;
}

.page-faq .faq-answer .link-more:hover {
  color: var(--flag-blue);
}

/* ---------- 配图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 24px;
  background: var(--paper);
  border: 1px solid var(--faq-line);
}

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

.page-faq .faq-figure figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--faq-line);
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .06em;
  color: var(--haze);
}

/* ---------- 分组内两栏（桌面） ---------- */
.page-faq .faq-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  align-items: start;
}

.page-faq .faq-split .faq-figure {
  margin-bottom: 0;
}

/* ---------- 侧栏 ---------- */
.page-faq .faq-side__panel {
  background: var(--ink-2);
  padding: 22px 20px 20px;
}

.page-faq .faq-side__title {
  margin: 0 0 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--rule);
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--haze);
}

.page-faq .faq-filter {
  margin-bottom: 18px;
}

.page-faq .faq-filter label {
  display: block;
  margin-bottom: 7px;
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .06em;
  color: var(--haze);
}

.page-faq .faq-filter input {
  box-sizing: border-box;
  width: 100%;
  padding: 9px 11px;
  border: 1px solid var(--rule-strong);
  border-radius: 0;
  background: rgba(255, 255, 255, .06);
  color: var(--flag-white);
  font-family: var(--font-mono);
  font-size: .8125rem;
}

.page-faq .faq-filter input::placeholder {
  color: rgba(255, 255, 255, .42);
}

.page-faq .faq-filter input:focus-visible {
  outline: 2px solid var(--flag-blue);
  outline-offset: 1px;
}

.page-faq .faq-toc {
  margin: 0;
  padding: 0;
  list-style: none;
}

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

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

.page-faq .faq-toc__link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 2px;
  color: var(--haze);
  font-size: .875rem;
  line-height: 1.5;
  text-decoration: none;
  transition: color .22s var(--ease);
}

.page-faq .faq-toc__link:hover,
.page-faq .faq-toc__link:focus-visible,
.page-faq .faq-toc__link.is-active {
  color: var(--flag-white);
}

.page-faq .faq-toc__dot {
  width: 8px;
  height: 8px;
  flex: 0 0 8px;
  background: var(--faq-dot, var(--haze));
  opacity: .6;
}

.page-faq .faq-toc__link.is-active .faq-toc__dot {
  opacity: 1;
}

.page-faq .faq-toc__link--search { --faq-dot: var(--flag-blue); }
.page-faq .faq-toc__link--ticket { --faq-dot: var(--flag-red); }
.page-faq .faq-toc__link--update { --faq-dot: var(--flag-green); }
.page-faq .faq-toc__link--errata { --faq-dot: var(--flag-yellow); }
.page-faq .faq-toc__link--alert  { --faq-dot: var(--flag-white); }
.page-faq .faq-toc__link--reach  { --faq-dot: var(--haze); }

.page-faq .faq-side__note {
  margin: 18px 0 0;
  font-size: .8125rem;
  line-height: 1.7;
  color: var(--haze);
}

.page-faq .faq-side__more {
  margin-top: 10px;
}

.page-faq .faq-side .link-more {
  color: var(--flag-white);
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .05em;
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 255, 255, .4);
  padding-bottom: 2px;
}

.page-faq .faq-side .link-more:hover {
  border-bottom-color: var(--flag-yellow);
  color: var(--flag-yellow);
}

/* ---------- 断点 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-hero {
    padding: calc(var(--header-h) + 84px) 0 72px;
  }

  .page-faq .faq-body {
    padding: 72px 0 104px;
  }

  .page-faq .faq-group {
    margin-bottom: 64px;
  }

  .page-faq .faq-item > summary {
    padding: 18px 2px;
    font-size: 1.0625rem;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-hero__flags {
    position: absolute;
    right: 28px;
    bottom: 0;
    z-index: 1;
    display: flex;
    align-items: flex-end;
    gap: 6px;
    height: 104px;
  }

  .page-faq .faq-hero__flags i {
    display: block;
    width: 10px;
    background: var(--haze);
  }

  .page-faq .faq-hero__flags i:nth-child(1) { height: 38%; background: var(--flag-blue); }
  .page-faq .faq-hero__flags i:nth-child(2) { height: 60%; background: var(--flag-white); }
  .page-faq .faq-hero__flags i:nth-child(3) { height: 88%; background: var(--flag-red); }
  .page-faq .faq-hero__flags i:nth-child(4) { height: 52%; background: var(--flag-green); }
  .page-faq .faq-hero__flags i:nth-child(5) { height: 72%; background: var(--flag-yellow); }
}

@media (min-width: 1080px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(0, 1fr) 292px;
    gap: 56px;
  }

  .page-faq .faq-side {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 32px;
  }
}

@media (max-width: 520px) {
  .page-faq .faq-item > summary {
    gap: 10px;
    font-size: 1rem;
  }

  .page-faq .faq-answer {
    padding: 16px;
    border-left-width: 3px;
  }

  .page-faq .faq-hero__jump a {
    padding: 6px 11px;
    font-size: .6875rem;
  }
}