.page-faq {
  --faq-gap: clamp(20px, 3vw, 32px);
  --faq-line: #2A3A34;
  background: var(--ink);
  color: var(--paper);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(36px, 8vw, 88px) clamp(32px, 7vw, 72px);
  border-bottom: 1px solid var(--edge);
  background: linear-gradient(180deg, rgba(19, 52, 42, 0.65) 0%, rgba(10, 26, 21, 0) 72%);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  z-index: 0;
  right: -26%;
  top: -30%;
  width: 86%;
  height: 168%;
  background: linear-gradient(158deg, var(--panel) 0%, rgba(19, 52, 42, 0) 74%);
  clip-path: polygon(40% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  z-index: 0;
  right: 6%;
  bottom: 0;
  width: 168px;
  height: 4px;
  background: var(--lime);
  clip-path: polygon(0 0, 100% 0, 90% 100%, 0 100%);
  pointer-events: none;
}

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

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
  margin-top: 24px;
}

.page-faq .faq-hero__title {
  margin: 10px 0 0;
  max-width: 16em;
}

.page-faq .faq-hero__lede {
  margin: 16px 0 0;
  max-width: 46ch;
  color: var(--mist);
}

.page-faq .faq-hero__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  background: var(--edge);
  border: 1px solid var(--edge);
  align-self: start;
}

.page-faq .faq-stat {
  background: var(--ink);
  padding: 14px 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-faq .faq-stat__key {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.page-faq .faq-stat__val {
  margin: 0;
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-size: 1.7rem;
  font-weight: 700;
  line-height: 1;
  color: var(--lime);
}

.page-faq .faq-stat__val--sm {
  font-size: 0.86rem;
  letter-spacing: 0.02em;
  color: var(--paper);
  padding-top: 4px;
}

/* ---------- 横幅图 ---------- */

.page-faq .faq-banner {
  position: relative;
  margin: 0 0 clamp(28px, 5vw, 56px);
  border: 1px solid var(--edge);
}

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

/* ---------- 布局 ---------- */

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
}

.page-faq .faq-index {
  border: 1px solid var(--faq-line);
  background: rgba(19, 52, 42, 0.4);
  padding: 14px;
}

.page-faq .faq-index__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--edge);
}

.page-faq .faq-index__sum {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 10px 0 0;
  padding: 0;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-index__item {
  flex: 0 0 auto;
}

.page-faq .faq-index__link {
  display: grid;
  grid-template-columns: auto auto auto;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  border: 1px solid var(--faq-line);
  color: var(--mist);
  font-size: 13px;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color var(--t) var(--ease), color var(--t) var(--ease), background var(--t) var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  border-color: var(--edge);
  color: var(--paper);
}

.page-faq .faq-index__link.is-active {
  border-color: var(--lime);
  background: rgba(216, 255, 62, 0.08);
  color: var(--lime);
}

.page-faq .faq-index__num {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-size: 11px;
  letter-spacing: 0.08em;
  opacity: 0.75;
}

.page-faq .faq-index__size {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-size: 11px;
  padding-left: 6px;
  border-left: 1px solid var(--faq-line);
  opacity: 0.8;
}

.page-faq .faq-index__note {
  margin: 12px 0 0;
  font-size: 12px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 问答组 ---------- */

.page-faq .faq-groups {
  display: grid;
  gap: clamp(32px, 5vw, 56px);
}

.page-faq .faq-group {
  scroll-margin-top: 96px;
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: baseline;
  gap: 6px 12px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--edge);
  margin-bottom: 4px;
}

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

.page-faq .faq-group__size {
  grid-column: 2;
  grid-row: 1;
  justify-self: end;
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

.page-faq .faq-group__title {
  grid-column: 1 / -1;
  grid-row: 2;
  margin: 4px 0 0;
}

.page-faq .faq-group__intro {
  grid-column: 1 / -1;
  grid-row: 3;
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
  max-width: 58ch;
}

.page-faq .faq-inline-link {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(216, 255, 62, 0.4);
}

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

/* ---------- 可展开条目 ---------- */

.page-faq .expand {
  border-left: 2px solid transparent;
  padding-left: 0;
  transition: border-color var(--t) var(--ease), padding var(--t) var(--ease);
}

.page-faq .expand + .expand {
  border-top: 1px solid var(--faq-line);
}

.page-faq .expand[data-open="true"] {
  border-left-color: var(--lime);
  padding-left: 12px;
}

.page-faq .expand__toggle {
  display: grid;
  grid-template-columns: 18px 3.4em minmax(0, 1fr);
  align-items: start;
  gap: 12px;
  width: 100%;
  padding: 16px 6px 16px 12px;
  background: none;
  border: 0;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: background var(--t) var(--ease);
}

.page-faq .expand__toggle:hover {
  background: rgba(30, 90, 70, 0.22);
}

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

.page-faq .expand__mark {
  position: relative;
  display: block;
  width: 14px;
  height: 14px;
  margin-top: 4px;
  border: 1px solid var(--edge);
  transition: border-color var(--t) var(--ease);
}

.page-faq .expand__mark::before,
.page-faq .expand__mark::after {
  content: "";
  position: absolute;
  background: var(--mist);
  transition: transform var(--t) var(--ease), background var(--t) var(--ease);
}

.page-faq .expand__mark::before {
  left: 50%;
  top: 3px;
  width: 1px;
  height: 8px;
  transform: translateX(-50%) scaleY(1);
}

.page-faq .expand__mark::after {
  top: 50%;
  left: 3px;
  width: 8px;
  height: 1px;
  transform: translateY(-50%);
}

.page-faq .expand[data-open="true"] .expand__mark {
  border-color: var(--lime);
}

.page-faq .expand[data-open="true"] .expand__mark::before {
  background: var(--lime);
  transform: translateX(-50%) scaleY(0);
}

.page-faq .expand[data-open="true"] .expand__mark::after {
  background: var(--lime);
}

.page-faq .faq-q__num {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
  padding-top: 4px;
}

.page-faq .expand[data-open="true"] .faq-q__num {
  color: var(--lime);
}

.page-faq .faq-q__text {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--paper);
}

.page-faq .expand__panel {
  padding: 0 6px 18px 42px;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.75;
}

.page-faq .expand__panel p {
  margin: 0 0 8px;
}

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

/* ---------- 排障路径 ---------- */

.page-faq .faq-triage {
  border-top: 1px solid var(--edge);
  background: linear-gradient(180deg, rgba(19, 52, 42, 0.55) 0%, rgba(10, 26, 21, 0) 100%);
}

.page-faq .faq-triage__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
}

.page-faq .faq-triage__lede {
  margin: 14px 0 22px;
  max-width: 52ch;
}

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

.page-faq .triage-step {
  display: grid;
  grid-template-columns: 2.6em minmax(0, 1fr);
  gap: 4px 16px;
  padding: 20px 0;
  border-top: 1px solid var(--faq-line);
}

.page-faq .triage-step:last-child {
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .triage-step__num {
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--lime);
}

.page-faq .triage-step__body h3 {
  margin: 0 0 6px;
}

.page-faq .triage-step__body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
  max-width: 52ch;
}

.page-faq .faq-triage__media {
  margin: 0;
  border: 1px solid var(--edge);
  align-self: start;
}

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

/* ---------- 联系入口 ---------- */

.page-faq .faq-cta__inner {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  padding: clamp(22px, 4vw, 40px);
  border: 1px solid var(--edge);
  background: linear-gradient(118deg, rgba(19, 52, 42, 0.95) 0%, rgba(19, 52, 42, 0.3) 78%);
}

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

.page-faq .faq-cta__note {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
  max-width: 56ch;
}

.page-faq .faq-cta__actions {
  display: grid;
  gap: 10px;
  align-self: end;
}

/* ---------- 断点 ---------- */

@media (min-width: 720px) {
  .page-faq .faq-layout {
    grid-template-columns: 232px minmax(0, 1fr);
    gap: 40px;
    align-items: start;
  }

  .page-faq .faq-index__list {
    display: block;
    overflow: visible;
  }

  .page-faq .faq-index__item + .faq-index__item {
    margin-top: 5px;
  }

  .page-faq .faq-index__link {
    grid-template-columns: auto 1fr auto;
    width: 100%;
  }

  .page-faq .expand__toggle {
    grid-template-columns: 20px 3.6em minmax(0, 1fr);
    padding: 18px 8px 18px 14px;
  }

  .page-faq .expand__panel {
    padding: 0 8px 20px 52px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 2.4fr) minmax(0, 1fr);
    align-items: end;
  }

  .page-faq .faq-triage__grid {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-faq .faq-cta__inner {
    grid-template-columns: minmax(0, 1fr) 220px;
    align-items: end;
  }
}

@media (min-width: 1100px) {
  .page-faq .faq-layout {
    grid-template-columns: 252px minmax(0, 1fr);
    gap: 56px;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 88px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .expand,
  .page-faq .expand__toggle,
  .page-faq .expand__mark,
  .page-faq .expand__mark::before,
  .page-faq .expand__mark::after,
  .page-faq .faq-index__link {
    transition: none;
  }
}