.page-faq {
  --faq-gap: clamp(1rem, 2.4vw, 2rem);
  --faq-radius: 0;
  padding-bottom: clamp(3rem, 7vw, 6rem);
}

.page-faq [id] {
  scroll-margin-top: calc(var(--bar-h) + 1.5rem);
}

.page-faq .crumbs {
  padding: clamp(1.25rem, 3vw, 2rem) 0 0;
  font-size: 0.8125rem;
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
  color: var(--mute);
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.page-faq .crumbs a {
  color: var(--cyan);
  text-decoration: none;
}

.page-faq .crumbs a:hover,
.page-faq .crumbs a:focus-visible {
  color: var(--gold-lit);
  text-decoration: underline;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-mast {
  padding: clamp(1.5rem, 4vw, 3rem) 0 clamp(2rem, 5vw, 4rem);
  position: relative;
}

.page-faq .faq-mast::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 68%;
  background:
    radial-gradient(120% 90% at 12% 0%, rgba(27, 111, 99, 0.55), transparent 62%),
    linear-gradient(160deg, rgba(9, 38, 32, 0.9), rgba(7, 26, 22, 0) 78%);
  pointer-events: none;
  z-index: 0;
}

.page-faq .faq-mast__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: var(--faq-gap);
  grid-template-columns: minmax(0, 1fr);
}

.page-faq .faq-mast__lead h1 {
  font-family: var(--font-title);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.08;
  font-size: clamp(2rem, 8.4vw, 4.4rem);
  margin: 0.5rem 0 1rem;
  color: var(--paper);
  max-width: 18ch;
}

.page-faq .faq-mast__lead .lede {
  max-width: 46ch;
  color: #d9d5c7;
  font-size: clamp(0.95rem, 1.6vw, 1.0625rem);
  line-height: 1.8;
}

.page-faq .faq-mast__lead .eyebrow {
  color: var(--gold);
}

.page-faq .faq-mast__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.page-faq .faq-mast__card {
  background: rgba(11, 43, 36, 0.86);
  border: var(--bd) solid var(--line);
  box-shadow: var(--shadow-hard);
  padding: clamp(1.15rem, 3vw, 1.75rem);
  backdrop-filter: blur(6px);
  align-self: start;
}

.page-faq .faq-mast__cardtitle {
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
  margin: 0 0 1rem;
}

.page-faq .faq-stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem 0.75rem;
}

.page-faq .faq-stats li {
  border-left: 3px solid var(--teal);
  padding-left: 0.65rem;
  min-width: 0;
}

.page-faq .faq-stats__n {
  display: block;
  font-size: clamp(1.5rem, 5vw, 2rem);
  font-weight: 700;
  color: var(--gold-lit);
  line-height: 1.1;
}

.page-faq .faq-stats__l {
  display: block;
  font-size: 0.78rem;
  color: var(--mute);
  margin-top: 0.2rem;
  line-height: 1.5;
}

.page-faq .faq-mast__note {
  margin: 1.35rem 0 0;
  padding-top: 1rem;
  border-top: 1px dashed var(--line);
  font-size: 0.78rem;
  line-height: 1.9;
  color: var(--cyan);
  word-break: break-all;
}

/* ---------- 通用区块 ---------- */
.page-faq .faq-sec {
  padding: clamp(2rem, 5vw, 3.5rem) 0;
}

.page-faq .faq-sec__head {
  margin-bottom: clamp(1.25rem, 3vw, 2rem);
  border-left: 4px solid var(--gold);
  padding-left: 0.9rem;
}

.page-faq .faq-sec__head h2,
.page-faq .faq-qa__head h2 {
  font-family: var(--font-title);
  font-weight: 800;
  letter-spacing: -0.01em;
  font-size: clamp(1.5rem, 4.4vw, 2.4rem);
  margin: 0 0 0.5rem;
  color: var(--paper);
}

.page-faq .faq-sec__head .mute,
.page-faq .faq-qa__head .mute,
.page-faq .faq-tree__intro {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--mute);
  max-width: 58ch;
}

/* ---------- 分类索引 ---------- */
.page-faq .faq-index__track {
  display: flex;
  gap: 0.9rem;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding: 0.25rem 0.25rem 1rem;
  margin: 0 -0.25rem;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-index__track::-webkit-scrollbar {
  height: 6px;
}

.page-faq .faq-index__track::-webkit-scrollbar-thumb {
  background: var(--line);
}

.page-faq .faq-cat {
  scroll-snap-align: start;
  flex: 0 0 78%;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  padding: 1.1rem 1rem 1.25rem;
  background: var(--panel);
  border: var(--bd) solid var(--line);
  box-shadow: 5px 5px 0 rgba(18, 61, 51, 0.7);
  text-decoration: none;
  color: var(--paper);
  transition: transform 0.18s var(--ease), border-color 0.18s var(--ease), box-shadow 0.18s var(--ease);
}

.page-faq .faq-cat:hover,
.page-faq .faq-cat:focus-visible {
  transform: translate(-3px, -3px);
  border-color: var(--cyan);
  box-shadow: 8px 8px 0 rgba(53, 224, 208, 0.28);
}

.page-faq .faq-cat__num {
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-faq .faq-cat h3 {
  margin: 0;
  font-family: var(--font-title);
  font-weight: 800;
  font-size: clamp(1.05rem, 3.4vw, 1.25rem);
  color: var(--paper);
}

.page-faq .faq-cat p {
  margin: 0;
  font-size: 0.83rem;
  line-height: 1.7;
  color: var(--mute);
  flex: 1 1 auto;
}

.page-faq .faq-cat__count {
  align-self: flex-start;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--ink);
  background: var(--gold);
  padding: 0.2rem 0.5rem;
  border: 1px solid var(--gold-lit);
}

.page-faq .faq-index__fig {
  margin: clamp(1.25rem, 3vw, 2rem) 0 0;
  border: var(--bd) solid var(--line);
  box-shadow: var(--shadow-hard);
  background:
    linear-gradient(145deg, rgba(27, 111, 99, 0.5), rgba(7, 26, 22, 0.95));
  overflow: hidden;
}

.page-faq .faq-index__fig img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.85) contrast(1.05);
}

.page-faq .media__cap {
  display: block;
  padding: 0.6rem 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--mute);
  border-top: 2px solid var(--line);
  background: rgba(7, 26, 22, 0.9);
}

/* ---------- 问答 + 分支树 ---------- */
.page-faq .faq-qa__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.75rem, 4vw, 3rem);
}

.page-faq .faq-qa__head {
  margin-bottom: 1.5rem;
}

.page-faq .faq-group {
  margin-bottom: clamp(1.5rem, 3.5vw, 2.25rem);
}

.page-faq .faq-group__title {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  font-family: var(--font-title);
  font-weight: 800;
  font-size: clamp(1rem, 2.8vw, 1.15rem);
  color: var(--gold-lit);
  margin: 0 0 0.85rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--line);
}

.page-faq .faq-group__title .mono {
  font-size: 0.78rem;
  color: var(--cyan);
  letter-spacing: 0.12em;
}

.page-faq .faq-item {
  border: var(--bd) solid var(--line);
  background: var(--panel);
  margin-bottom: 0.6rem;
  transition: border-color 0.18s var(--ease);
}

.page-faq .faq-item[open] {
  border-color: var(--teal);
  box-shadow: 5px 5px 0 rgba(18, 61, 51, 0.75);
}

.page-faq .faq-item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.85rem;
  padding: 0.9rem 1rem;
  font-weight: 700;
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--paper);
}

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

.page-faq .faq-item summary::after {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 1.15rem;
  line-height: 1.2;
  color: var(--cyan);
}

.page-faq .faq-item[open] summary::after {
  content: "−";
  color: var(--gold-lit);
}

.page-faq .faq-item summary:hover,
.page-faq .faq-item summary:focus-visible {
  color: var(--gold-lit);
}

.page-faq .faq-item__body {
  padding: 0 1rem 1rem;
  border-top: 1px dashed var(--line);
  font-size: 0.9rem;
  line-height: 1.8;
  color: #d5d2c5;
}

.page-faq .faq-item__body ol {
  margin: 0.85rem 0 0.7rem;
  padding-left: 1.15rem;
  display: grid;
  gap: 0.4rem;
}

.page-faq .faq-item__body li::marker {
  font-family: var(--font-mono);
  color: var(--gold);
}

.page-faq .faq-item__body p {
  margin: 0;
  color: var(--mute);
  font-size: 0.86rem;
  border-left: 3px solid var(--copper);
  padding-left: 0.7rem;
}

/* ---------- 分支树 ---------- */
.page-faq .faq-tree {
  background:
    linear-gradient(180deg, rgba(27, 111, 99, 0.35), rgba(11, 43, 36, 0.95));
  border: var(--bd) solid var(--line);
  box-shadow: var(--shadow-hard);
  padding: clamp(1.15rem, 3vw, 1.75rem);
  align-self: start;
  min-width: 0;
}

.page-faq .faq-tree h2 {
  font-family: var(--font-title);
  font-weight: 800;
  font-size: clamp(1.3rem, 3.8vw, 1.6rem);
  margin: 0 0 0.5rem;
  color: var(--paper);
}

.page-faq .faq-tree__intro {
  margin-bottom: 1.1rem;
}

.page-faq .faq-tree__fig {
  margin: 0 0 1.25rem;
  border: 2px solid var(--line);
  background: rgba(7, 26, 22, 0.85);
  overflow: hidden;
}

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

.page-faq .faq-branch {
  position: relative;
  display: grid;
  gap: 0.55rem;
  padding-left: 0.9rem;
  border-left: 2px solid var(--teal);
}

.page-faq .faq-branch__item {
  position: relative;
  background: rgba(7, 26, 22, 0.7);
  border: 2px solid var(--line);
}

.page-faq .faq-branch__item::before {
  content: "";
  position: absolute;
  left: -0.9rem;
  top: 1.05rem;
  width: 0.9rem;
  height: 2px;
  background: var(--teal);
}

.page-faq .faq-branch__item[open] {
  border-color: var(--cyan);
}

.page-faq .faq-branch__item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.7rem 0.85rem;
  font-family: var(--font-title);
  font-weight: 800;
  font-size: 0.9rem;
  color: var(--paper);
}

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

.page-faq .faq-branch__dot {
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  background: var(--gold);
  border: 2px solid var(--gold-lit);
  transform: rotate(45deg);
}

.page-faq .faq-branch__item[open] .faq-branch__dot {
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-faq .faq-branch__item summary:hover,
.page-faq .faq-branch__item summary:focus-visible {
  color: var(--gold-lit);
}

.page-faq .faq-branch__steps {
  margin: 0;
  padding: 0 0.85rem 0 1.9rem;
  font-size: 0.82rem;
  line-height: 1.75;
  color: #d5d2c5;
  display: grid;
  gap: 0.3rem;
}

.page-faq .faq-branch__steps li::marker {
  font-family: var(--font-mono);
  color: var(--cyan);
}

.page-faq .faq-branch__tip {
  margin: 0.6rem 0.85rem 0.8rem;
  padding: 0.5rem 0.65rem;
  font-size: 0.76rem;
  line-height: 1.7;
  color: var(--copper);
  background: rgba(217, 142, 95, 0.12);
  border-left: 3px solid var(--copper);
}

/* ---------- 联系前准备 ---------- */
.page-faq .faq-prep {
  background:
    linear-gradient(150deg, rgba(11, 43, 36, 0.95), rgba(7, 26, 22, 0.6));
  border-top: var(--bd) solid var(--line);
  border-bottom: var(--bd) solid var(--line);
}

.page-faq .faq-prep__grid {
  display: grid;
  gap: clamp(1.25rem, 3.5vw, 2.5rem);
  grid-template-columns: minmax(0, 1fr);
}

.page-faq .faq-prep__lead h2 {
  font-family: var(--font-title);
  font-weight: 900;
  letter-spacing: -0.015em;
  font-size: clamp(1.5rem, 4.6vw, 2.3rem);
  margin: 0 0 0.75rem;
  color: var(--paper);
}

.page-faq .faq-prep__lead p {
  margin: 0;
  color: var(--mute);
  font-size: 0.9rem;
  line-height: 1.85;
  max-width: 46ch;
}

.page-faq .faq-prep__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.25rem;
}

.page-faq .faq-prep__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.7rem;
  grid-template-columns: minmax(0, 1fr);
}

.page-faq .faq-prep__steps li {
  background: var(--panel);
  border: var(--bd) solid var(--line);
  padding: 0.9rem 1rem;
  min-width: 0;
  transition: border-color 0.18s var(--ease), transform 0.18s var(--ease);
}

.page-faq .faq-prep__steps li:hover {
  border-color: var(--gold);
  transform: translateX(3px);
}

.page-faq .faq-prep__idx {
  display: inline-block;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--ink);
  background: var(--gold);
  padding: 0.1rem 0.4rem;
  margin-bottom: 0.45rem;
}

.page-faq .faq-prep__steps h3 {
  margin: 0 0 0.3rem;
  font-family: var(--font-title);
  font-weight: 800;
  font-size: 0.98rem;
  color: var(--paper);
}

.page-faq .faq-prep__steps p {
  margin: 0;
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--mute);
}

.page-faq .faq-prep__strip {
  margin-top: clamp(1.5rem, 4vw, 2.25rem);
  padding-top: 1.1rem;
  border-top: 2px solid var(--line);
  display: grid;
  gap: 0.7rem;
  grid-template-columns: minmax(0, 1fr);
}

.page-faq .faq-prep__stripitem {
  margin: 0;
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--paper);
  word-break: break-word;
}

.page-faq .faq-prep__stripitem .mono {
  display: block;
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--cyan);
  margin-bottom: 0.15rem;
}

.page-faq .faq-prep__stripitem a {
  color: var(--gold-lit);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-prep__stripitem a:hover,
.page-faq .faq-prep__stripitem a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-faq .faq-cat {
    flex: 0 0 46%;
  }

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

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

@media (min-width: 900px) {
  .page-faq .faq-mast__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-mast__card {
    margin-top: clamp(1.5rem, 5vw, 4rem);
    margin-left: clamp(-2.5rem, -2vw, 0rem);
  }

  .page-faq .faq-index__track {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    overflow-x: visible;
    padding: 0.25rem 0 0.5rem;
    margin: 0;
    gap: 1rem;
  }

  .page-faq .faq-cat {
    flex: 1 1 auto;
  }

  .page-faq .faq-qa__grid {
    grid-template-columns: minmax(0, 1.65fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-tree {
    position: sticky;
    top: calc(var(--bar-h) + 1.5rem);
  }

  .page-faq .faq-prep__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr);
    align-items: start;
  }

  .page-faq .faq-prep__strip {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1.1rem;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-mast__lead h1 {
    max-width: 16ch;
  }

  .page-faq .faq-index__track {
    gap: 1.25rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-cat,
  .page-faq .faq-item,
  .page-faq .faq-prep__steps li,
  .page-faq .faq-branch__item {
    transition: none;
  }

  .page-faq .faq-cat:hover,
  .page-faq .faq-cat:focus-visible,
  .page-faq .faq-prep__steps li:hover {
    transform: none;
  }
}