.page-faq {
  --faq-rule: rgba(42, 33, 28, 0.18);
  --faq-rule-soft: rgba(42, 33, 28, 0.08);
  padding-bottom: 4.5rem;
}

/* ---------- 面包屑与首屏框景 ---------- */

.page-faq .crumbs {
  padding-top: 1.25rem;
}

.page-faq .faq-hero {
  padding-top: 0.75rem;
}

.page-faq .faq-hero__frame {
  position: relative;
  background: var(--paper-lift);
  border: 1px solid var(--ink-soft);
  box-shadow: 8px 8px 0 var(--faq-rule-soft);
  padding: 1.75rem 1.1rem 1.6rem;
}

.page-faq .faq-hero__frame::before,
.page-faq .faq-hero__frame::after {
  content: "";
  position: absolute;
  height: 7px;
  width: 64px;
  background-image: repeating-linear-gradient(
    to right,
    var(--ash) 0 1px,
    transparent 1px 8px
  );
  pointer-events: none;
}

.page-faq .faq-hero__frame::before {
  top: 0;
  left: 22px;
}

.page-faq .faq-hero__frame::after {
  bottom: 0;
  right: 22px;
}

.page-faq .faq-hero__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.7rem, 7vw, 2.55rem);
  line-height: 1.22;
  letter-spacing: -0.015em;
  color: var(--ink);
  margin: 0.55rem 0 0.85rem;
  max-width: 20em;
}

.page-faq .faq-hero__lede {
  max-width: 44em;
  color: var(--ink-soft);
}

.page-faq .faq-hero__toc {
  margin-top: 1.7rem;
}

.page-faq .faq-hero__index {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--faq-rule);
  border: 1px solid var(--faq-rule);
}

.page-faq .faq-hero__index li {
  background: var(--paper);
  min-width: 0;
}

.page-faq .faq-hero__index a {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  padding: 0.7rem 0.9rem;
  color: var(--ink);
  text-decoration: none;
  font-size: 0.94rem;
  line-height: 1.5;
  border-left: 2px solid transparent;
  transition: border-color 180ms ease, background-color 180ms ease;
}

.page-faq .faq-hero__index a:hover,
.page-faq .faq-hero__index a:focus-visible {
  border-left-color: var(--red);
  background: var(--paper-lift);
}

.page-faq .faq-hero__index .num {
  flex: none;
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  color: var(--ash);
}

@media (min-width: 640px) {
  .page-faq .faq-hero__frame {
    padding: 2.25rem 2rem 2rem;
  }

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

@media (min-width: 1024px) {
  .page-faq .faq-hero__index {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 章节面板 ---------- */

.page-faq .faq-block {
  margin-top: 3rem;
  scroll-margin-top: 1.5rem;
}

.page-faq .faq-block:first-of-type {
  margin-top: 2.5rem;
}

.page-faq .faq-block__panel {
  padding: 1.4rem 1.05rem 1.6rem;
}

.page-faq .faq-block__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.45rem 0.85rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--faq-rule);
  margin-bottom: 1.35rem;
}

.page-faq .faq-block__no {
  flex: none;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--red);
}

.page-faq .faq-block__title {
  flex: 1 1 auto;
  min-width: 0;
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.15rem, 4.4vw, 1.5rem);
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-faq .faq-block__note {
  flex: none;
  font-family: var(--font-label);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ash);
}

@media (min-width: 720px) {
  .page-faq .faq-block__panel {
    padding: 2rem 1.9rem 2.2rem;
  }

  .page-faq .faq-block {
    margin-top: 3.75rem;
  }
}

/* ---------- 通用双栏 ---------- */

.page-faq .faq-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.6rem;
}

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

@media (min-width: 900px) {
  .page-faq .faq-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 2.6rem;
    align-items: start;
  }

  .page-faq .faq-grid--flip {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }
}

/* ---------- 编号步骤 ---------- */

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

.page-faq .faq-step {
  position: relative;
  padding-left: 1.75rem;
  padding-bottom: 1.35rem;
}

.page-faq .faq-step::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.5rem;
  width: 7px;
  height: 7px;
  background: var(--paper-lift);
  border: 2px solid var(--red);
  transform: rotate(45deg);
}

.page-faq .faq-step::after {
  content: "";
  position: absolute;
  left: 4px;
  top: 1.6rem;
  bottom: 0;
  width: 1px;
  background-image: repeating-linear-gradient(
    to bottom,
    var(--faq-rule) 0 3px,
    transparent 3px 8px
  );
}

.page-faq .faq-step:last-child {
  padding-bottom: 0;
}

.page-faq .faq-step:last-child::after {
  display: none;
}

.page-faq .faq-step__title {
  margin: 0 0 0.25rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.02rem;
  line-height: 1.45;
  color: var(--ink);
}

.page-faq .faq-step__text {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-faq .faq-steplist--tight .faq-step {
  padding-bottom: 1rem;
}

/* ---------- 图 ---------- */

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

.page-faq .faq-figure .figure-frame {
  border: 1px solid var(--ink-soft);
  background: var(--night);
}

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

.page-faq .faq-figure .figure-frame__cap {
  display: block;
  margin-top: 0.6rem;
  font-size: 0.78rem;
  line-height: 1.65;
  color: var(--ash);
}

/* ---------- 边注卡 ---------- */

.page-faq .faq-aside {
  position: relative;
  background: var(--paper);
  border: 1px solid var(--faq-rule);
  padding: 1rem 1rem 1.1rem;
}

.page-faq .faq-aside::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  width: 28px;
  height: 3px;
  background: var(--red);
}

.page-faq .faq-aside__title {
  margin: 0 0 0.7rem;
  font-family: var(--font-label);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ash);
}

.page-faq .faq-aside__text {
  margin: 0.85rem 0 0;
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-faq .faq-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.page-faq .faq-chip {
  font-family: var(--font-label);
  font-size: 0.76rem;
  letter-spacing: 0.07em;
  padding: 0.34rem 0.72rem;
  border: 1px solid var(--faq-rule);
  background: var(--paper-lift);
  color: var(--ink-soft);
}

.page-faq .faq-chip--on {
  border-color: var(--red);
  background: var(--red);
  color: var(--paper-lift);
}

.page-faq .faq-chip--cold {
  border-color: var(--indigo);
  color: var(--indigo);
}

/* ---------- 字段说明 ---------- */

.page-faq .faq-legend {
  list-style: none;
  margin: 1.1rem 0 1.6rem;
  padding: 0;
  border-top: 1px solid var(--faq-rule);
}

.page-faq .faq-legend li {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.2rem;
  padding: 0.8rem 0;
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .faq-legend strong {
  font-family: var(--font-label);
  font-size: 0.92rem;
  letter-spacing: 0.07em;
  color: var(--ink);
}

.page-faq .faq-legend span {
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--ink-soft);
}

@media (min-width: 620px) {
  .page-faq .faq-legend li {
    grid-template-columns: 6.5rem minmax(0, 1fr);
    gap: 1.2rem;
    align-items: baseline;
  }
}

.page-faq .faq-subhead {
  margin: 1.6rem 0 0.9rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.05rem;
  line-height: 1.4;
  color: var(--ink);
  padding-left: 0.7rem;
  border-left: 3px solid var(--orange);
}

.page-faq .faq-tail {
  margin: 1.5rem 0 0;
  padding-top: 0.9rem;
  border-top: 1px dashed var(--faq-rule);
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--ash);
}

/* ---------- 注记释义 ---------- */

.page-faq .faq-notes {
  margin: 1.2rem 0 0;
  padding: 0;
  border-top: 1px solid var(--faq-rule);
}

.page-faq .faq-notes__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.25rem;
  padding: 0.85rem 0 0.95rem;
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .faq-notes__row dt {
  font-family: var(--font-label);
  font-size: 0.86rem;
  letter-spacing: 0.08em;
  color: var(--orange);
}

.page-faq .faq-notes__row dd {
  margin: 0;
  font-size: 0.91rem;
  line-height: 1.75;
  color: var(--ink-soft);
}

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

.page-faq .faq-bounds li {
  position: relative;
  padding-left: 1.15rem;
  margin-bottom: 0.65rem;
  font-size: 0.91rem;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-faq .faq-bounds li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65rem;
  width: 9px;
  height: 1px;
  background: var(--ash);
}

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

/* ---------- 问答折叠 ---------- */

.page-faq .faq-qa {
  border: 1px solid var(--faq-rule);
  background: var(--paper-lift);
  margin-bottom: 0.7rem;
}

.page-faq .faq-qa:last-of-type {
  margin-bottom: 0;
}

.page-faq .faq-qa > summary {
  position: relative;
  cursor: pointer;
  list-style: none;
  padding: 0.85rem 2.6rem 0.85rem 2.35rem;
  font-size: 0.96rem;
  font-weight: 600;
  line-height: 1.6;
  color: var(--ink);
}

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

.page-faq .faq-qa > summary::marker {
  content: "";
}

.page-faq .faq-qa > summary::before {
  content: "+";
  position: absolute;
  left: 0.85rem;
  top: 0.82rem;
  font-family: var(--font-num);
  font-size: 1.05rem;
  line-height: 1.1;
  color: var(--red);
}

.page-faq .faq-qa[open] > summary::before {
  content: "—";
}

.page-faq .faq-qa > summary::after {
  content: "";
  position: absolute;
  right: 0.9rem;
  top: 1.35rem;
  width: 10px;
  height: 1px;
  background: var(--ash);
}

.page-faq .faq-qa[open] > summary {
  background: var(--paper);
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .faq-qa__body {
  padding: 0.9rem 1rem 1.05rem 2.35rem;
  font-size: 0.92rem;
  line-height: 1.78;
  color: var(--ink-soft);
}

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

/* ---------- 术语对照 ---------- */

.page-faq .faq-dict {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--faq-rule);
  border: 1px solid var(--faq-rule);
  margin: 1.2rem 0 0;
}

.page-faq .faq-dict__item {
  background: var(--paper-lift);
  padding: 0.85rem 1rem 0.95rem;
  min-width: 0;
}

.page-faq .faq-dict__term {
  display: block;
  margin-bottom: 0.3rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  line-height: 1.4;
  color: var(--ink);
}

.page-faq .faq-dict__desc {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-faq .faq-dict__val {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: 0.92rem;
  color: var(--red);
  white-space: nowrap;
}

@media (min-width: 700px) {
  .page-faq .faq-dict {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-dict__item {
    padding: 1rem 1.1rem 1.1rem;
  }
}

/* ---------- 延伸阅读 ---------- */

.page-faq .faq-exit {
  margin-top: 3rem;
}

.page-faq .faq-exit__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.1rem;
  align-items: center;
  background: var(--night);
  color: var(--paper);
  padding: 1.4rem 1.15rem 1.5rem;
  border: 1px solid var(--ink);
  position: relative;
}

.page-faq .faq-exit__inner::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 46px;
  height: 3px;
  background: var(--orange);
}

.page-faq .faq-exit__text p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.75;
  color: rgba(244, 239, 230, 0.82);
}

.page-faq .faq-exit__text .eyebrow {
  margin-bottom: 0.45rem;
  color: var(--orange);
}

.page-faq .faq-exit__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

@media (min-width: 760px) {
  .page-faq .faq-exit__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    padding: 1.7rem 1.8rem;
    gap: 2rem;
  }

  .page-faq .faq-exit__acts {
    justify-content: flex-end;
  }
}

/* ---------- 窄屏保护 ---------- */

@media (max-width: 380px) {
  .page-faq .faq-hero__frame {
    padding: 1.35rem 0.85rem 1.3rem;
  }

  .page-faq .faq-block__panel {
    padding: 1.1rem 0.8rem 1.3rem;
  }

  .page-faq .faq-qa > summary {
    padding-left: 2rem;
    padding-right: 1.6rem;
  }

  .page-faq .faq-qa__body {
    padding-left: 2rem;
    padding-right: 0.85rem;
  }
}

.page-faq .faq-hero__index a:focus-visible,
.page-faq .faq-qa > summary:focus-visible {
  outline: 2px solid var(--red);
  outline-offset: 2px;
}