.page-faq {
  display: block;
  background: var(--paper);
  color: var(--ink);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding-block: clamp(1.75rem, 5vw, 3.5rem) clamp(2rem, 5vw, 3.5rem);
  background: var(--paper);
  border-bottom: 4px solid var(--ink);
}
.page-faq .faq-hero__inner {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
  align-items: start;
}
.page-faq .faq-crumb-sep {
  color: var(--gold);
  margin: 0 .4em;
}
.page-faq .faq-hero__title {
  margin: .5rem 0 1rem;
  font-family: var(--serif);
  font-weight: 900;
  font-size: clamp(2.3rem, 9vw, 4.6rem);
  line-height: 1.04;
  letter-spacing: -.02em;
}
.page-faq .faq-hero__title em {
  font-style: normal;
  display: inline-block;
  background: var(--red);
  color: var(--paper);
  padding: 0 .14em;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
}
.page-faq .faq-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2.25rem;
  margin: 1.75rem 0 0;
  padding: 1.1rem 0 0;
  list-style: none;
  border-top: 3px solid var(--ink);
}
.page-faq .faq-fact {
  display: flex;
  flex-direction: column;
  gap: .3rem;
}
.page-faq .faq-fact__num {
  font-family: var(--mono);
  font-size: 2.1rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--ink);
  background: var(--gold-soft);
  padding: 0 .3rem;
  align-self: flex-start;
}
.page-faq .faq-fact__label {
  font-size: .86rem;
  color: var(--charcoal);
  letter-spacing: .01em;
}
.page-faq .faq-hero__visual {
  padding: clamp(.75rem, 2vw, 1.25rem);
  background: var(--aged);
  border: 3px solid var(--ink);
  box-shadow: 10px 10px 0 var(--red);
}
.page-faq .faq-hero__visual svg {
  display: block;
  width: 100%;
  height: auto;
}

/* ---------- 分类索引 ---------- */
.page-faq .faq-index {
  padding-block: clamp(2.25rem, 6vw, 4.5rem);
  background: var(--ink);
  color: var(--paper);
  border-bottom: 4px solid var(--gold);
}
.page-faq .faq-index__head {
  max-width: 46em;
  margin-bottom: clamp(1.25rem, 3vw, 2rem);
}
.page-faq .faq-index__title {
  margin: 0 0 .6rem;
  font-family: var(--serif);
  font-weight: 900;
  font-size: clamp(1.8rem, 5vw, 2.75rem);
  letter-spacing: -.01em;
  color: var(--paper);
}
.page-faq .faq-index__lead {
  margin: 0;
  color: var(--on-dark-dim);
  font-size: 1rem;
  line-height: 1.8;
}
.page-faq .faq-index__grid {
  display: grid;
  gap: .9rem;
}
.page-faq .faq-idx {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: .35rem;
  padding: 1.1rem 1.2rem 1.2rem;
  text-decoration: none;
  color: var(--paper);
  background: rgba(245, 240, 230, .05);
  border: 2px solid var(--gold-line);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.page-faq .faq-idx:hover,
.page-faq .faq-idx:focus-visible {
  background: var(--red);
  border-color: var(--gold-soft);
  transform: translateY(-2px);
}
.page-faq .faq-idx:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}
.page-faq .faq-idx__no {
  font-family: var(--mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--gold);
  line-height: 1;
}
.page-faq .faq-idx:hover .faq-idx__no {
  color: var(--gold-soft);
}
.page-faq .faq-idx__name {
  font-family: var(--serif);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: .01em;
}
.page-faq .faq-idx__desc {
  font-size: .84rem;
  line-height: 1.7;
  color: var(--on-dark-dim);
}
.page-faq .faq-idx__go {
  position: absolute;
  top: 1rem;
  right: 1rem;
  font-size: 1rem;
  color: var(--gold);
}
.page-faq .faq-index__figure {
  margin: clamp(1.5rem, 4vw, 2.5rem) 0 0;
  border: 2px solid var(--gold-line);
}
.page-faq .faq-index__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-faq .faq-index__figure figcaption {
  padding: .75rem 1rem;
  font-size: .84rem;
  line-height: 1.7;
  color: var(--on-dark-dim);
  border-top: 2px solid var(--gold-line);
}

/* ---------- 问答主体 ---------- */
.page-faq .faq-body {
  padding-block: clamp(2.25rem, 6vw, 4.5rem);
  background: var(--paper);
}
.page-faq .faq-layout {
  display: grid;
  gap: clamp(1.5rem, 4vw, 3rem);
}
.page-faq .faq-rail {
  padding-left: 1rem;
  border-left: 4px solid var(--ink);
}
.page-faq .faq-rail__label {
  margin: 0 0 .5rem;
  font-family: var(--mono);
  font-size: .74rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--charcoal);
}
.page-faq .faq-rail__list {
  display: flex;
  gap: .5rem;
  margin: 0;
  padding: 0 0 .25rem;
  list-style: none;
  overflow-x: auto;
}
.page-faq .faq-rail__item {
  flex: none;
}
.page-faq .faq-rail__link {
  display: flex;
  align-items: baseline;
  gap: .5rem;
  padding: .5rem .75rem;
  font-size: .92rem;
  font-weight: 600;
  color: var(--indigo);
  text-decoration: none;
  background: var(--aged);
  border: 2px solid var(--ink);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.page-faq .faq-rail__link:hover {
  background: var(--gold-soft);
  color: var(--red-deep);
}
.page-faq .faq-rail__link:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}
.page-faq .faq-rail__no {
  font-family: var(--mono);
  font-size: .8rem;
  color: var(--red);
}
.page-faq .faq-rail__line {
  display: none;
}

.page-faq .faq-stream {
  min-width: 0;
}
.page-faq .faq-group + .faq-group {
  margin-top: clamp(2.25rem, 6vw, 3.75rem);
  padding-top: clamp(2rem, 5vw, 3rem);
  border-top: 3px solid var(--ink);
}
.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-areas:
    "no title"
    "no lead";
  gap: .35rem 1rem;
  align-items: baseline;
}
.page-faq .faq-group__no {
  grid-area: no;
  margin: 0;
  font-family: var(--mono);
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 700;
  line-height: 1;
  color: var(--red);
}
.page-faq .faq-group__title {
  grid-area: title;
  margin: 0;
  font-family: var(--serif);
  font-weight: 900;
  font-size: clamp(1.6rem, 4.5vw, 2.35rem);
  letter-spacing: -.01em;
}
.page-faq .faq-group__lead {
  grid-area: lead;
  margin: .25rem 0 0;
  font-size: .96rem;
  line-height: 1.75;
  color: var(--charcoal);
}
.page-faq .faq-group__bar {
  display: block;
  height: 4px;
  margin: 1.1rem 0 1.4rem;
  background: linear-gradient(90deg, var(--gold) 0%, var(--gold) 42%, rgba(201, 162, 39, 0) 100%);
}
.page-faq .faq-group__bar[data-reveal] {
  opacity: .42;
  transition: opacity 240ms var(--ease);
}
.page-faq .faq-group__bar[data-reveal="on"] {
  opacity: 1;
}

.page-faq .faq-flow {
  margin: 0 0 1.5rem;
  background: var(--aged);
  border: 3px solid var(--ink);
  box-shadow: 7px 7px 0 var(--gold-soft);
}
.page-faq .faq-flow img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-faq .faq-flow figcaption {
  padding: .7rem .95rem;
  font-size: .84rem;
  color: var(--charcoal);
  border-top: 2px solid var(--ink);
}

.page-faq .faq-list {
  display: grid;
  gap: .9rem;
}
.page-faq .faq-item {
  background: var(--paper);
  border: 3px solid var(--ink);
  box-shadow: 6px 6px 0 var(--aged);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.page-faq .faq-item:hover {
  border-color: var(--red);
}
.page-faq .faq-item[open] {
  border-color: var(--red);
  box-shadow: 8px 8px 0 var(--gold-soft);
}
.page-faq .faq-item__q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) 18px;
  gap: .7rem;
  align-items: baseline;
  padding: 1rem 1.05rem;
  cursor: pointer;
  list-style: none;
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(1.02rem, 2.6vw, 1.22rem);
  line-height: 1.5;
  color: var(--ink);
}
.page-faq .faq-item__q::-webkit-details-marker {
  display: none;
}
.page-faq .faq-item__q:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}
.page-faq .faq-item__no {
  font-family: var(--mono);
  font-size: .8rem;
  font-weight: 700;
  color: var(--red);
  letter-spacing: .04em;
}
.page-faq .faq-item__text {
  min-width: 0;
}
.page-faq .faq-item__mark {
  position: relative;
  width: 18px;
  height: 18px;
  align-self: center;
}
.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  background: var(--gold);
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease);
}
.page-faq .faq-item__mark::before {
  left: 0;
  right: 0;
  top: 7px;
  height: 3px;
}
.page-faq .faq-item__mark::after {
  top: 0;
  bottom: 0;
  left: 7px;
  width: 3px;
}
.page-faq .faq-item[open] .faq-item__mark::after {
  transform: scaleY(0);
}
.page-faq .faq-item[open] .faq-item__mark::before {
  background: var(--red);
}
.page-faq .faq-item__a {
  padding: 0 1.05rem 1.15rem;
  border-top: 1px dashed var(--hairline);
  margin-inline: 1.05rem;
  padding-inline: 0;
  padding-top: .95rem;
  font-size: .98rem;
  line-height: 1.85;
  color: var(--charcoal);
}
.page-faq .faq-item__a p {
  margin: 0;
}

.page-faq .faq-more {
  display: flex;
  align-items: center;
  gap: .9rem;
  flex-wrap: wrap;
  margin-top: 1.4rem;
  padding: 1rem 1.15rem;
  text-decoration: none;
  background: var(--ink);
  color: var(--paper);
  border: 3px solid var(--ink);
  box-shadow: 6px 6px 0 var(--aged);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.page-faq .faq-more:hover {
  background: var(--red);
  border-color: var(--red-deep);
  box-shadow: 8px 8px 0 var(--gold-soft);
}
.page-faq .faq-more:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}
.page-faq .faq-more__label {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.08rem;
}
.page-faq .faq-more__hint {
  display: none;
  font-size: .84rem;
  color: var(--on-dark-dim);
}
.page-faq .faq-more__arrow {
  margin-left: auto;
  color: var(--gold);
  font-size: 1.15rem;
}

/* ---------- 口径基准 ---------- */
.page-faq .faq-basis {
  padding-block: clamp(2rem, 5vw, 3.5rem);
  background: var(--aged);
  border-top: 3px solid var(--ink);
  border-bottom: 3px solid var(--ink);
}
.page-faq .faq-basis__inner {
  display: grid;
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: start;
}
.page-faq .faq-basis__stamp {
  width: 168px;
  height: 168px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: .3rem;
  color: var(--red);
  background: rgba(200, 16, 46, .06);
  border: 6px double var(--red);
  transform: rotate(-4deg);
}
.page-faq .faq-basis__stamp-year {
  font-family: var(--serif);
  font-weight: 900;
  font-size: 2.5rem;
  line-height: 1;
  letter-spacing: .02em;
}
.page-faq .faq-basis__stamp-label {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: .3em;
  text-indent: .3em;
}
.page-faq .faq-basis__title {
  margin: 0 0 .8rem;
  font-family: var(--serif);
  font-weight: 900;
  font-size: clamp(1.5rem, 4vw, 2.1rem);
  letter-spacing: -.01em;
}
.page-faq .faq-basis__body p {
  margin: 0 0 1rem;
  max-width: 40em;
  font-size: .98rem;
  line-height: 1.85;
  color: var(--charcoal);
}
.page-faq .faq-basis__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: .7rem;
}
.page-faq .faq-basis__list li {
  position: relative;
  padding-left: 1.35rem;
  max-width: 42em;
  font-size: .94rem;
  line-height: 1.8;
  color: var(--charcoal);
}
.page-faq .faq-basis__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 14px;
  height: 3px;
  background: var(--gold);
}

/* ---------- 页尾延伸 ---------- */
.page-faq .faq-tail {
  padding-block: clamp(2.25rem, 6vw, 4rem);
  background: var(--ink);
  color: var(--paper);
}
.page-faq .faq-tail__inner {
  display: grid;
  gap: .9rem;
  max-width: 44em;
}
.page-faq .faq-tail__title {
  margin: 0;
  font-family: var(--serif);
  font-weight: 900;
  font-size: clamp(1.6rem, 4.5vw, 2.25rem);
  letter-spacing: -.01em;
}
.page-faq .faq-tail__text {
  margin: 0;
  color: var(--on-dark-dim);
  font-size: .98rem;
  line-height: 1.85;
}
.page-faq .faq-tail__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem 1.5rem;
  margin-top: .5rem;
}
.page-faq .faq-tail__link {
  color: var(--gold-soft);
  font-size: .94rem;
  text-decoration: underline;
  text-underline-offset: 4px;
}
.page-faq .faq-tail__link:hover {
  color: var(--gold);
}
.page-faq .faq-tail__link:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}
.page-faq .faq-tail__note {
  margin: 0;
  padding-top: 1rem;
  border-top: 1px solid var(--on-dark-line);
  font-size: .84rem;
  color: var(--on-dark-dim);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-index__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-faq .faq-item__a {
    padding-left: 1.05rem;
    padding-right: 1.05rem;
    margin-inline: 0;
  }
  .page-faq .faq-more__hint {
    display: inline;
    margin-left: auto;
  }
  .page-faq .faq-more__arrow {
    margin-left: 0;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }
  .page-faq .faq-layout {
    grid-template-columns: 216px minmax(0, 1fr);
    align-items: start;
  }
  .page-faq .faq-rail {
    position: sticky;
    top: 1.5rem;
  }
  .page-faq .faq-rail__list {
    display: block;
    overflow: visible;
    padding: 0;
  }
  .page-faq .faq-rail__item + .page-faq .faq-rail__item {
    margin-top: .45rem;
  }
  .page-faq .faq-rail__link {
    width: 100%;
    background: transparent;
    border: 0;
    border-bottom: 1px solid var(--hairline);
    padding: .55rem .25rem;
  }
  .page-faq .faq-rail__link:hover {
    background: var(--gold-soft);
    padding-left: .6rem;
  }
  .page-faq .faq-rail__line {
    display: block;
    height: 3px;
    margin-top: 1.25rem;
    background: linear-gradient(90deg, var(--gold) 0%, rgba(201, 162, 39, 0) 100%);
  }
  .page-faq .faq-rail__line[data-reveal] {
    opacity: .4;
    transition: opacity 240ms var(--ease);
  }
  .page-faq .faq-rail__line[data-reveal="on"] {
    opacity: 1;
  }
  .page-faq .faq-basis__inner {
    grid-template-columns: 208px minmax(0, 1fr);
  }
}

@media (min-width: 1040px) {
  .page-faq .faq-index__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}