.page-faq {
  --faq-rule: #C9D6CF;
  --faq-body: #2B3A34;
  --faq-muted: #5A6A63;
  background: var(--paper);
  color: var(--carbon);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  background: var(--base);
  color: var(--paper);
  padding: clamp(28px, 5vw, 56px) 0 clamp(48px, 8vw, 104px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(200, 255, 61, 0.07) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(200, 255, 61, 0.07) 1px, transparent 1px);
  background-size: 88px 88px;
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
}

.page-faq .faq-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--steel);
}

.page-faq .faq-crumb a {
  color: var(--steel-lt);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

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

.page-faq .faq-crumb__sep {
  color: var(--lime);
}

.page-faq .faq-hero__kicker {
  margin: clamp(28px, 5vw, 56px) 0 0;
  color: var(--lime);
}

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  color: var(--paper);
  font-size: clamp(42px, 8vw, 108px);
  line-height: 0.94;
  letter-spacing: -0.03em;
  text-wrap: balance;
}

.page-faq .faq-hero__lead {
  margin: clamp(20px, 3vw, 32px) 0 0;
  max-width: 36em;
  font-size: clamp(16px, 1.7vw, 18px);
  line-height: 1.75;
  color: var(--steel-lt);
}

.page-faq .faq-index {
  margin-top: clamp(36px, 5vw, 64px);
  max-width: 900px;
}

.page-faq .faq-index__label {
  margin: 0 0 14px;
  color: var(--steel);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid rgba(242, 246, 241, 0.16);
}

.page-faq .faq-index__link {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  min-height: 44px;
  padding: 15px 10px 15px 0;
  color: var(--paper);
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.5;
  text-decoration: none;
  border-bottom: 1px solid rgba(242, 246, 241, 0.16);
  transition: background-color 0.2s var(--ease), padding-left 0.2s var(--ease), color 0.2s var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  background: var(--base-2);
  padding-left: 12px;
  color: var(--lime);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-weight: 200;
  font-size: 15px;
  letter-spacing: 0.06em;
  color: var(--lime);
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-groups {
  padding-top: clamp(48px, 7vw, 96px);
  padding-bottom: clamp(24px, 4vw, 48px);
}

.page-faq .faq-groups__head {
  max-width: 44em;
}

.page-faq .faq-groups__title {
  margin: 12px 0 0;
  color: var(--carbon);
}

.page-faq .faq-groups__intro {
  margin: 16px 0 0;
  max-width: 36em;
  font-size: 16px;
  line-height: 1.75;
  color: var(--faq-body);
}

.page-faq .faq-block {
  margin-top: clamp(36px, 5vw, 64px);
}

.page-faq .faq-block__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: 4px 16px;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--carbon);
}

.page-faq .faq-block__num {
  font-family: var(--font-mono);
  font-weight: 200;
  font-size: clamp(28px, 3.4vw, 44px);
  line-height: 1;
  color: var(--steel);
  letter-spacing: 0.02em;
}

.page-faq .faq-block__title {
  margin: 0;
  color: var(--carbon);
}

.page-faq .faq-block__note {
  grid-column: 1 / -1;
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--faq-muted);
}

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

.page-faq .faq-item {
  position: relative;
  border-bottom: 1px solid var(--faq-rule);
  transition: background-color 0.22s var(--ease), padding-left 0.22s var(--ease);
}

.page-faq .faq-item summary {
  display: grid;
  grid-template-columns: 14px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  min-height: 44px;
  padding: 18px 4px 18px 0;
  cursor: pointer;
  list-style: none;
}

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

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

.page-faq .faq-item summary:focus-visible {
  outline: 2px solid var(--lime-deep);
  outline-offset: 2px;
}

.page-faq .faq-item__mark {
  width: 12px;
  height: 12px;
  margin-top: 7px;
  background: var(--paper);
  border: 2px solid var(--lime-deep);
  transition: background-color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-faq .faq-item__q {
  font-size: clamp(16px, 1.75vw, 19px);
  font-weight: 600;
  line-height: 1.55;
  color: var(--carbon);
  transition: color 0.2s var(--ease);
}

.page-faq .faq-item summary:hover .faq-item__q {
  color: var(--lime-deep);
}

.page-faq .faq-item[open] {
  padding-left: 16px;
  background: linear-gradient(90deg, rgba(200, 255, 61, 0.2), rgba(200, 255, 61, 0) 60%);
}

.page-faq .faq-item[open]::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--lime-deep);
}

.page-faq .faq-item[open] .faq-item__mark {
  background: var(--lime);
  border-color: var(--ink);
}

.page-faq .faq-item__body {
  padding: 0 4px 20px 28px;
}

.page-faq .faq-item__body p {
  margin: 0 0 10px;
  max-width: 38em;
  font-size: 16px;
  line-height: 1.75;
  color: var(--faq-body);
}

.page-faq .faq-item__body p:last-child {
  margin-bottom: 0;
}

.page-faq .faq-inline-link {
  color: var(--lime-deep);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 2px solid var(--lime-deep);
  padding-bottom: 1px;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

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

/* ---------- 条文层级路径 ---------- */
.page-faq .faq-path {
  position: relative;
  overflow: hidden;
  background: var(--base);
  color: var(--paper);
  padding: clamp(52px, 8vw, 104px) 0;
}

.page-faq .faq-path::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(200, 255, 61, 0.06) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(200, 255, 61, 0.06) 1px, transparent 1px);
  background-size: 64px 64px;
  pointer-events: none;
}

.page-faq .faq-path__grid {
  position: relative;
  z-index: 1;
}

.page-faq .faq-path__intro {
  max-width: 40em;
}

.page-faq .faq-path .label {
  color: var(--lime);
}

.page-faq .faq-path__title {
  margin: 12px 0 0;
  color: var(--paper);
}

.page-faq .faq-path__lead {
  margin: 16px 0 0;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.75;
  color: var(--steel-lt);
}

.page-faq .faq-tree {
  list-style: none;
  margin: clamp(32px, 5vw, 56px) 0 0;
  padding: 0;
}

.page-faq .faq-tree__node {
  position: relative;
  margin-left: 8px;
  padding: 0 0 32px 40px;
  border-left: 2px solid rgba(200, 255, 61, 0.3);
}

.page-faq .faq-tree__node:last-child {
  border-left-color: transparent;
  padding-bottom: 0;
}

.page-faq .faq-tree__node::before {
  content: "";
  position: absolute;
  left: -9px;
  top: 4px;
  width: 14px;
  height: 14px;
  background: var(--base);
  border: 2px solid var(--lime);
}

.page-faq .faq-tree__node::after {
  content: "";
  position: absolute;
  left: 9px;
  top: 10px;
  width: 22px;
  height: 2px;
  background: rgba(200, 255, 61, 0.45);
}

.page-faq .faq-tree__step {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--steel);
}

.page-faq .faq-tree__name {
  margin: 0 0 8px;
  font-size: clamp(19px, 2vw, 24px);
  font-weight: 700;
  line-height: 1.3;
  color: var(--paper);
}

.page-faq .faq-tree__desc {
  margin: 0;
  max-width: 32em;
  font-size: 15px;
  line-height: 1.75;
  color: var(--steel-lt);
}

.page-faq .faq-figure {
  margin: clamp(32px, 5vw, 48px) 0 0;
}

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

.page-faq .faq-figure__cap {
  display: block;
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  line-height: 1.6;
  color: var(--steel);
}

/* ---------- 术语词典 ---------- */
.page-faq .faq-terms-section {
  background: var(--base-2);
  color: var(--paper);
  padding: clamp(52px, 8vw, 104px) 0;
}

.page-faq .faq-terms__head {
  max-width: 38em;
}

.page-faq .faq-terms-section .label {
  color: var(--orange);
}

.page-faq .faq-terms__title {
  margin: 12px 0 0;
  color: var(--paper);
}

.page-faq .faq-terms__intro {
  margin: 16px 0 0;
  max-width: 32em;
  font-size: 16px;
  line-height: 1.75;
  color: var(--steel-lt);
}

.page-faq .faq-terms {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  margin: clamp(28px, 4vw, 40px) 0 0;
}

.page-faq .faq-term {
  border-top: 1px solid rgba(242, 246, 241, 0.2);
  padding: 16px 0 18px;
}

.page-faq .faq-term dt {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: 0.04em;
  color: var(--lime);
}

.page-faq .faq-term dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--steel-lt);
}

.page-faq .faq-figure--terms .faq-figure__cap {
  color: var(--steel);
}

/* ---------- 未解决时的联络 ---------- */
.page-faq .faq-help {
  padding: clamp(52px, 8vw, 104px) 0 clamp(64px, 9vw, 120px);
}

.page-faq .faq-help__body {
  min-width: 0;
}

.page-faq .faq-help__title {
  margin: 12px 0 0;
  color: var(--carbon);
}

.page-faq .faq-help__lead {
  margin: 18px 0 0;
  color: var(--faq-body);
}

.page-faq .faq-help__list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  max-width: 38em;
}

.page-faq .faq-help__list li {
  position: relative;
  padding: 12px 0 12px 26px;
  border-bottom: 1px solid var(--faq-rule);
  font-size: 16px;
  line-height: 1.7;
  color: var(--faq-body);
}

.page-faq .faq-help__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 21px;
  width: 10px;
  height: 10px;
  background: var(--lime);
  border: 2px solid var(--ink);
}

.page-faq .faq-help__more {
  margin: 22px 0 0;
  max-width: 38em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--faq-body);
}

.page-faq .faq-help__btn {
  margin-top: 26px;
  display: inline-block;
}

.page-faq .faq-help__card {
  margin-top: 32px;
  padding: 24px;
  background: var(--base);
  color: var(--paper);
  border: var(--border-hard);
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-help__card-label {
  margin: 0 0 14px;
  color: var(--lime);
}

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

.page-faq .faq-help__row {
  padding: 14px 0;
  border-top: 1px solid rgba(242, 246, 241, 0.18);
}

.page-faq .faq-help__row:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-faq .faq-help__row dt {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--steel);
}

.page-faq .faq-help__row dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--paper);
  overflow-wrap: anywhere;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-terms {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 32px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-index__link {
    grid-template-columns: 56px minmax(0, 1fr);
    padding: 17px 12px 17px 0;
  }

  .page-faq .faq-block__head {
    grid-template-columns: auto minmax(0, 1fr);
    column-gap: 24px;
  }

  .page-faq .faq-block__note {
    grid-column: 2;
    margin-top: 2px;
  }

  .page-faq .faq-item summary {
    padding: 20px 8px 20px 0;
  }

  .page-faq .faq-item__body {
    padding: 0 8px 24px 28px;
  }

  .page-faq .faq-path__grid {
    display: grid;
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 40px 56px;
    align-items: start;
  }

  .page-faq .faq-path__intro {
    grid-column: 1 / -1;
  }

  .page-faq .faq-tree {
    margin-top: 8px;
  }

  .page-faq .faq-figure {
    margin-top: 8px;
  }

  .page-faq .faq-terms-wrap {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.62fr);
    gap: 56px;
    align-items: start;
  }

  .page-faq .faq-figure--terms {
    margin-top: 8px;
  }

  .page-faq .faq-help__grid {
    display: grid;
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 56px;
    align-items: start;
  }

  .page-faq .faq-help__card {
    margin-top: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__link,
  .page-faq .faq-item,
  .page-faq .faq-item summary,
  .page-faq .faq-item__mark,
  .page-faq .faq-item__q,
  .page-faq .faq-inline-link,
  .page-faq .faq-crumb a {
    transition: none;
  }
}