.page-faq {
  --faq-measure: 66ch;
  --faq-indent: 0px;
  padding-block: clamp(16px, 2.6vw, 32px) clamp(64px, 9vw, 128px);
}

.page-faq .breadcrumbs {
  margin: 0 0 clamp(16px, 2.6vw, 28px);
}

/* ---------- 框景首屏 ---------- */
.page-faq .faq-frame {
  position: relative;
  border: 1px solid var(--rule);
  background:
    radial-gradient(120% 92% at 100% 0%, var(--blue-soft) 0%, rgba(220, 228, 255, 0) 54%),
    linear-gradient(168deg, var(--paper) 0%, var(--paper) 58%, var(--paper-2) 100%);
  padding: clamp(26px, 4.4vw, 60px) clamp(20px, 3.6vw, 52px);
  overflow: hidden;
}

.page-faq .faq-frame__corner {
  position: absolute;
  width: 16px;
  height: 16px;
  border: 0 solid var(--ink);
  pointer-events: none;
}

.page-faq .faq-frame__corner--tl { top: 9px; left: 9px; border-top-width: 2px; border-left-width: 2px; }
.page-faq .faq-frame__corner--tr { top: 9px; right: 9px; border-top-width: 2px; border-right-width: 2px; }
.page-faq .faq-frame__corner--bl { bottom: 9px; left: 9px; border-bottom-width: 2px; border-left-width: 2px; }
.page-faq .faq-frame__corner--br { bottom: 9px; right: 9px; border-bottom-width: 2px; border-right-width: 2px; }

.page-faq .faq-frame__ticks {
  position: absolute;
  left: 0;
  right: 0;
  height: 6px;
  opacity: .85;
  pointer-events: none;
  background-image: repeating-linear-gradient(
    90deg,
    var(--rule) 0,
    var(--rule) 1px,
    transparent 1px,
    transparent 16px
  );
}

.page-faq .faq-frame__ticks--top { top: 0; }
.page-faq .faq-frame__ticks--bottom { bottom: 0; }

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(26px, 4vw, 56px);
  align-items: end;
}

.page-faq .faq-hero__grid > * { min-width: 0; }

.page-faq .faq-hero__text {
  display: flex;
  flex-direction: column;
  gap: clamp(12px, 1.8vw, 18px);
}

.page-faq .faq-hero__text > * { margin: 0; }
.page-faq .faq-hero__text .lead { max-width: 48ch; }

.page-faq .faq-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(16px, 3vw, 40px);
  margin: clamp(4px, 1vw, 8px) 0 0;
  padding-top: clamp(14px, 2vw, 20px);
  border-top: 1px solid var(--rule);
}

.page-faq .faq-fact { margin: 0; }

.page-faq .faq-fact dt {
  margin-bottom: .35em;
  font-size: .75rem;
  font-weight: 500;
  letter-spacing: .08em;
  color: var(--gray);
}

.page-faq .faq-fact dd {
  margin: 0;
  font-size: .9375rem;
  font-weight: 600;
  color: var(--ink);
}

.page-faq .faq-fact dd .t-mono {
  margin-right: .28em;
  font-size: 1.25rem;
  color: var(--blue);
}

.page-faq .faq-hero__media { margin: 0; }

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

/* ---------- 分组索引 ---------- */
.page-faq .faq-index {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px clamp(12px, 1.8vw, 24px);
  margin-top: clamp(34px, 5vw, 64px);
  padding-bottom: 14px;
  border-bottom: 1px solid var(--rule);
}

.page-faq .faq-index__label { margin: 0; color: var(--gray); }

.page-faq .faq-index__list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px clamp(12px, 1.6vw, 22px);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: .45em;
  padding-bottom: 2px;
  font-size: .875rem;
  font-weight: 600;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--blue);
  border-bottom-color: var(--blue);
}

.page-faq .faq-index__link .t-mono {
  font-size: .75rem;
  color: var(--blue);
}

/* ---------- 筛选 ---------- */
.page-faq .faq-filter {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 16px;
  margin-top: clamp(20px, 3vw, 32px);
}

.page-faq .faq-filter__label {
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--gray);
}

.page-faq .faq-filter__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-group {
  margin-top: clamp(44px, 6.5vw, 88px);
  scroll-margin-top: 88px;
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas:
    "idx title"
    "meta meta";
  align-items: center;
  gap: 8px clamp(12px, 2vw, 20px);
  padding-bottom: clamp(12px, 1.8vw, 16px);
  border-bottom: 1px solid var(--ink);
}

.page-faq .faq-group__idx {
  grid-area: idx;
  align-self: stretch;
  display: flex;
  align-items: center;
  padding-right: clamp(12px, 2vw, 20px);
  border-right: 1px solid var(--rule);
  font-size: clamp(1.375rem, 3.4vw, 2rem);
  font-weight: 600;
  line-height: 1;
  color: var(--blue);
}

.page-faq .faq-group__title {
  grid-area: title;
  margin: 0;
  font-family: var(--sans);
  font-size: clamp(1.25rem, 2.6vw, 1.75rem);
  font-weight: 800;
  letter-spacing: -.015em;
  line-height: 1.2;
  color: var(--ink);
}

.page-faq .faq-group__meta {
  grid-area: meta;
  justify-self: start;
  font-size: .75rem;
  letter-spacing: .06em;
  color: var(--gray);
}

.page-faq .faq-group__lead {
  max-width: 62ch;
  margin: clamp(14px, 2vw, 20px) 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--blue);
  font-size: .875rem;
  line-height: 1.8;
  color: var(--gray);
}

/* ---------- 问答条目 ---------- */
.page-faq .faq-list { margin-top: clamp(6px, 1vw, 10px); }

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

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  gap: clamp(10px, 1.8vw, 18px);
  padding: clamp(16px, 2.4vw, 22px) 0;
  cursor: pointer;
  list-style: none;
  font-size: clamp(1rem, 1.6vw, 1.0625rem);
  font-weight: 700;
  line-height: 1.62;
  color: var(--ink);
  transition: color .18s var(--ease);
}

.page-faq .faq-item__q::-webkit-details-marker { display: none; }
.page-faq .faq-item__q::marker { content: ""; }

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

.page-faq .faq-item__q:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 4px;
}

.page-faq .faq-item__q::after {
  content: "+";
  flex: 0 0 auto;
  width: 1.1em;
  transform: translateY(.16em);
  font-family: var(--mono);
  font-size: 1.25rem;
  font-weight: 500;
  line-height: 1;
  text-align: center;
  color: var(--blue);
}

.page-faq .faq-item__num {
  flex: 0 0 auto;
  padding-top: .38em;
  font-size: .75rem;
  letter-spacing: .04em;
  color: var(--gray);
}

.page-faq .faq-item__text {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .faq-item[open] > .faq-item__q { color: var(--blue); }
.page-faq .faq-item[open] > .faq-item__q::after { content: "−"; }

.page-faq .faq-item__a {
  max-width: var(--faq-measure);
  padding: 0 0 clamp(18px, 2.6vw, 26px);
  font-size: .9688rem;
  line-height: 1.9;
  color: var(--ink-2);
  animation: faq-answer-in .2s var(--ease) both;
}

.page-faq .faq-item__a > p { margin: 0 0 .8em; }
.page-faq .faq-item__a > p:last-child { margin-bottom: 0; }

.page-faq .faq-item__a a {
  color: var(--blue);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.page-faq .faq-item__a a:hover { color: var(--ink); }

.page-faq .faq-key {
  display: inline-block;
  padding: .04em .4em;
  background: var(--blue-soft);
  border-radius: 2px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--ink);
}

.page-faq .faq-item__contact {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  margin-top: .9em;
  padding-top: .9em;
  border-top: 1px dashed var(--rule);
}

.page-faq .faq-mail {
  font-size: .875rem;
  overflow-wrap: anywhere;
  color: var(--ink);
}

.page-faq .faq-inline-media {
  max-width: 280px;
  margin: clamp(16px, 2.4vw, 26px) 0 0;
}

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

@keyframes faq-answer-in {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- 断点 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-group__head {
    grid-template-columns: auto 1fr auto;
    grid-template-areas: "idx title meta";
  }

  .page-faq .faq-group__meta { justify-self: end; }

  .page-faq .faq-item__a { padding-left: 54px; }

  .page-faq .faq-inline-media { max-width: 300px; }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
  }
}

@media (max-width: 420px) {
  .page-faq .faq-filter__label { flex-basis: 100%; }
  .page-faq .faq-item__q::after { font-size: 1.125rem; }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__link,
  .page-faq .faq-item__q { transition: none; }
  .page-faq .faq-item__a { animation: none; }
  .page-faq .faq-item__q::after { transform: none; }
}