.page-faq {
  --faq-index-w: 252px;
  --faq-body-w: 720px;
  --faq-sc: 58, 61, 66;
}

/* ---------------- 首屏 ---------------- */
.page-faq .faq-hero {
  position: relative;
  background-color: var(--cream);
  background-image:
    linear-gradient(180deg, rgba(244, 241, 234, 0) 58%, var(--paper) 100%),
    repeating-linear-gradient(90deg, rgba(58, 61, 66, .07) 0 1px, transparent 1px 42px);
  border-bottom: 1px solid var(--rule);
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 3px;
  background: linear-gradient(90deg, var(--blue) 0 30%, var(--orange) 30% 38%, var(--steel) 38% 100%);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
  padding-block: clamp(1.75rem, 4.5vw, 3.25rem) clamp(2.25rem, 5.5vw, 4.25rem);
}

.page-faq .faq-hero__title {
  margin: .55rem 0 0;
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(2.4rem, 7vw, 5.25rem);
  line-height: 1.02;
  letter-spacing: -.02em;
  color: var(--ink);
  max-width: 12ch;
}

.page-faq .faq-hero__side {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.page-faq .faq-hero__intro {
  margin: 0;
  padding-left: 1rem;
  border-left: 3px solid var(--brass);
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--graphite);
  max-width: 48ch;
}

.page-faq .faq-hero__facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 0;
  border-top: 1px solid var(--rule);
}

.page-faq .faq-fact {
  padding: .85rem .7rem .2rem 0;
  border-right: 1px solid var(--rule);
}

.page-faq .faq-fact:last-child {
  border-right: 0;
  padding-right: 0;
}

.page-faq .faq-fact dt {
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 600;
  line-height: 1.15;
  color: var(--blue);
}

.page-faq .faq-fact dd {
  margin: .35rem 0 0;
  font-size: .75rem;
  letter-spacing: .1em;
  color: var(--graphite);
}

/* ---------------- 主体两栏 ---------------- */
.page-faq .faq-body {
  background: var(--paper);
  padding-block: clamp(2.25rem, 5vw, 3.75rem);
}

.page-faq .faq-body__grid {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
}

/* 左栏索引 */
.page-faq .faq-index {
  background: var(--cream);
  border: 1px solid var(--rule);
  border-radius: var(--r-lg);
  padding: 1.15rem 1.1rem 1.25rem;
}

.page-faq .faq-index__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: .75rem;
  padding-bottom: .75rem;
  border-bottom: 1px solid var(--rule);
}

.page-faq .faq-index__head .eyebrow {
  margin: 0;
}

.page-faq .faq-index__hint {
  margin: 0;
  font-size: .6875rem;
  letter-spacing: .12em;
  color: var(--graphite);
  opacity: .75;
}

.page-faq .faq-index__list {
  list-style: none;
  margin: .75rem 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: .15rem;
}

.page-faq .index-list__item {
  margin: 0;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: .7rem;
  padding: .6rem .6rem;
  border-radius: var(--r-md);
  color: var(--graphite);
  text-decoration: none;
  font-size: .9375rem;
  line-height: 1.4;
  transition: background-color 160ms var(--ease), color 160ms var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  background: rgba(31, 78, 121, .1);
  color: var(--blue-deep);
}

.page-faq .faq-index__link.is-active {
  background: var(--blue);
  color: var(--paper);
}

.page-faq .faq-index__link.is-active .index-list__num {
  color: var(--orange);
}

.page-faq .index-list__num {
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .08em;
  color: var(--brass);
  flex: none;
  padding-top: .1rem;
}

.page-faq .index-list__label {
  display: block;
}

.page-faq .faq-index__foot {
  margin: 1rem 0 0;
  padding-top: .85rem;
  border-top: 1px dashed var(--rule);
  font-size: .6875rem;
  letter-spacing: .1em;
  color: var(--graphite);
  opacity: .8;
}

/* 右栏问答 */
.page-faq .faq-flow {
  max-width: var(--faq-body-w);
  min-width: 0;
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(2.5rem, 6vw, 4rem);
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: .85rem;
  padding-bottom: .7rem;
  border-bottom: 2px solid var(--ink);
}

.page-faq .faq-group__num {
  font-size: .8125rem;
  letter-spacing: .1em;
  color: var(--orange);
  flex: none;
}

.page-faq .faq-group__head .h-sec {
  margin: 0;
  font-weight: 900;
  letter-spacing: -.01em;
  color: var(--ink);
}

.page-faq .faq-group__lede {
  margin: .9rem 0 0;
  font-size: .9375rem;
  line-height: 1.75;
  color: var(--graphite);
  max-width: 62ch;
}

.page-faq .faq-group__list {
  margin-top: 1.35rem;
}

/* 手风琴条目 */
.page-faq .faq-item {
  border-bottom: 1px solid var(--rule);
}

.page-faq .faq-item__q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: start;
  gap: .8rem;
  padding: 1.05rem .2rem;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-item__q:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
  border-radius: var(--r-md);
}

.page-faq .faq-item__num {
  font-size: .75rem;
  letter-spacing: .08em;
  color: var(--brass);
  padding-top: .28rem;
  flex: none;
}

.page-faq .faq-item__text {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1rem, 1.6vw, 1.125rem);
  line-height: 1.5;
  color: var(--ink);
  letter-spacing: -.005em;
}

.page-faq .faq-item[open] .faq-item__text {
  color: var(--blue-deep);
}

.page-faq .faq-item__mark {
  position: relative;
  width: .85rem;
  height: .85rem;
  margin-top: .42rem;
  flex: none;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  background: var(--blue);
  border-radius: 2px;
  transition: transform 180ms var(--ease), opacity 180ms var(--ease);
}

.page-faq .faq-item__mark::before {
  left: 0;
  top: 50%;
  width: 100%;
  height: 2px;
  transform: translateY(-50%);
}

.page-faq .faq-item__mark::after {
  top: 0;
  left: 50%;
  width: 2px;
  height: 100%;
  transform: translateX(-50%);
}

.page-faq .faq-item[open] .faq-item__mark::after {
  transform: translateX(-50%) scaleY(0);
  opacity: 0;
}

.page-faq .faq-item[open] .faq-item__mark::before {
  background: var(--orange);
}

.page-faq .faq-item__body {
  padding: 0 .2rem 1.35rem 2.15rem;
  max-width: 660px;
  animation: faq-open 180ms var(--ease);
}

@keyframes faq-open {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.page-faq .faq-item__body p {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.8;
  color: var(--graphite);
}

.page-faq .faq-item__foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
  margin-top: 1rem !important;
  padding-top: .85rem;
  border-top: 1px dashed var(--rule);
  font-size: .75rem;
  letter-spacing: .02em;
  color: var(--graphite);
}

.page-faq .faq-item__link {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(31, 78, 121, .35);
  padding-bottom: 1px;
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}

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

/* ---------------- 媒体 ---------------- */
.page-faq .faq-media {
  margin: 1.5rem 0 0;
}

.page-faq .faq-media--tight {
  margin-top: 1.35rem;
}

.page-faq .faq-media .media__frame {
  overflow: hidden;
  border-radius: var(--r-lg);
  border: 1px solid var(--rule);
  background: var(--cream);
}

.page-faq .faq-media .media__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-faq .faq-media--tight .media__img {
  aspect-ratio: 12 / 7;
}

.page-faq .faq-media .media__caption {
  margin-top: .6rem;
  font-size: .75rem;
  letter-spacing: .04em;
  color: var(--graphite);
  opacity: .85;
}

/* ---------------- 状态横向带 ---------------- */
.page-faq .faq-band {
  margin-top: 1.5rem;
  background: var(--cream);
  border: 1px solid var(--rule);
  border-radius: var(--r-xl);
  padding: clamp(1rem, 2.6vw, 1.6rem);
}

.page-faq .faq-band__track {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(180px, 1fr);
  gap: .9rem;
  overflow-x: auto;
  padding-bottom: .55rem;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-band__item {
  scroll-snap-align: start;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: .6rem;
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: var(--r-lg);
  padding: 1rem .95rem 1.1rem;
  min-width: 0;
}

.page-faq .faq-band__code {
  margin: 0;
  font-size: .6875rem;
  letter-spacing: .14em;
  color: var(--brass);
}

.page-faq .faq-band__desc {
  margin: 0;
  font-size: .8125rem;
  line-height: 1.7;
  color: var(--graphite);
}

.page-faq .faq-state {
  --sc: var(--faq-sc);
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  padding: .3rem .75rem;
  border-radius: var(--r-pill);
  border: 1.5px solid rgba(var(--sc), .55);
  background: rgba(var(--sc), .1);
  color: rgb(var(--sc));
  font-size: .8125rem;
  font-weight: 700;
  letter-spacing: .02em;
  white-space: nowrap;
}

.page-faq .faq-state::before {
  content: "";
  width: .42rem;
  height: .42rem;
  border-radius: 50%;
  background: currentColor;
  flex: none;
}

.page-faq .faq-state--s2,
.page-faq .faq-state--s3 {
  --sc: 31, 78, 121;
}

.page-faq .faq-state--s4 {
  --sc: 226, 113, 29;
}

.page-faq .faq-state--s5 {
  --sc: 196, 69, 31;
}

.page-faq .faq-state--s6 {
  --sc: 47, 107, 79;
}

/* ---------------- 尾部延伸 ---------------- */
.page-faq .faq-tail {
  background: var(--cream);
  border-top: 1px solid var(--rule);
  padding-block: clamp(2rem, 5vw, 3.25rem);
}

.page-faq .faq-tail__inner {
  display: grid;
  gap: clamp(1.5rem, 3.5vw, 2.5rem);
}

.page-faq .faq-tail__lead .eyebrow {
  margin: 0 0 .5rem;
}

.page-faq .faq-tail__lead .h-sec {
  margin: 0;
  font-weight: 900;
  color: var(--ink);
  max-width: 22ch;
}

.page-faq .faq-tail__links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .75rem;
}

.page-faq .faq-tail__link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: .3rem .9rem;
  padding: .95rem 1.05rem;
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: var(--r-lg);
  text-decoration: none;
  color: var(--ink);
  transition: border-color 160ms var(--ease), transform 160ms var(--ease), box-shadow 160ms var(--ease);
}

.page-faq .faq-tail__link:hover,
.page-faq .faq-tail__link:focus-visible {
  border-color: var(--blue);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(30, 26, 23, .07);
}

.page-faq .faq-tail__num {
  grid-row: 1 / span 2;
  font-size: .6875rem;
  letter-spacing: .1em;
  color: var(--brass);
  padding-top: .2rem;
  min-width: 5.5rem;
}

.page-faq .faq-tail__label {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.0625rem;
  line-height: 1.4;
}

.page-faq .faq-tail__desc {
  font-size: .8125rem;
  line-height: 1.65;
  color: var(--graphite);
}

/* ---------------- 响应式 ---------------- */
@media (min-width: 720px) {
  .page-faq .faq-tail__inner {
    grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr);
    align-items: start;
  }

  .page-faq .faq-tail__links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.22fr) minmax(0, .88fr);
    align-items: end;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-body__grid {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 1.25rem);
  }
}

@media (max-width: 999px) {
  .page-faq .faq-index__list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: .3rem;
  }
}

@media (max-width: 560px) {
  .page-faq .faq-hero__title {
    max-width: none;
  }

  .page-faq .faq-hero__facts {
    grid-template-columns: 1fr;
    border-top: 0;
  }

  .page-faq .faq-fact {
    border-right: 0;
    border-top: 1px solid var(--rule);
    padding: .7rem 0 .7rem;
  }

  .page-faq .faq-item__q {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: .55rem .7rem;
  }

  .page-faq .faq-item__num {
    grid-column: 1;
    grid-row: 1;
  }

  .page-faq .faq-item__text {
    grid-column: 1;
    grid-row: 2;
  }

  .page-faq .faq-item__mark {
    grid-column: 2;
    grid-row: 1 / span 2;
    margin-top: .55rem;
  }

  .page-faq .faq-item__body {
    padding-left: .2rem;
  }

  .page-faq .faq-tail__link {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-faq .faq-tail__num {
    grid-row: auto;
    min-width: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__body {
    animation: none;
  }

  .page-faq .faq-item__mark::before,
  .page-faq .faq-item__mark::after,
  .page-faq .faq-index__link,
  .page-faq .faq-tail__link {
    transition: none;
  }

  .page-faq .faq-tail__link:hover,
  .page-faq .faq-tail__link:focus-visible {
    transform: none;
  }
}