.page-faq {
  --faq-side: 236px;
  --faq-wash: rgba(34, 224, 214, .07);
  --faq-wash-soft: rgba(34, 224, 214, .05);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding: clamp(26px, 5vw, 54px) 0 clamp(20px, 3vw, 34px);
}
.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  margin-top: 26px;
  align-items: start;
}
.page-faq .faq-hero__kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
  padding: 5px 16px 5px 6px;
  border: 1px solid var(--c-line);
  border-radius: var(--r-pill);
  background: var(--c-surface);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--c-muted);
}
.page-faq .faq-hero__kicker-num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0;
  color: var(--c-data);
  background: rgba(255, 185, 60, .12);
  border-radius: var(--r-pill);
  padding: 2px 11px;
}
.page-faq .faq-hero__title {
  margin: 0 0 20px;
  max-width: 21ch;
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -.02em;
  font-size: clamp(31px, 5.2vw, 58px);
  line-height: 1.12;
}
.page-faq .faq-hero__lead {
  margin: 0 0 24px;
  max-width: 42em;
  font-size: clamp(15px, 1.35vw, 17px);
  line-height: 1.85;
  color: var(--c-muted);
}
.page-faq .faq-hero__tags {
  margin: 0;
}
.page-faq .faq-hero__vnote {
  display: none;
}
.page-faq .faq-hero__figure {
  margin: 32px 0 0;
  border: 1px solid var(--c-line);
  border-radius: var(--r-card);
  overflow: hidden;
  background: var(--c-surface);
}
.page-faq .faq-hero__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

@media (min-width: 980px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 44px;
  }
  .page-faq .faq-hero__vnote {
    display: block;
    margin: 4px 0 0;
    padding-left: 14px;
    border-left: 1px solid var(--c-line);
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: .3em;
    color: var(--c-muted);
    writing-mode: vertical-rl;
    text-orientation: mixed;
  }
}

/* ---------- 手册区 ---------- */
.page-faq .faq-manual {
  padding: clamp(34px, 5vw, 62px) 0;
  border-top: 1px solid var(--c-line);
}
.page-faq .faq-manual__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  margin-top: 32px;
}

/* 侧栏目录 */
.page-faq .faq-toc {
  padding: 16px 14px;
  border: 1px solid var(--c-line);
  border-radius: var(--r-card);
  background: var(--c-surface);
}
.page-faq .faq-toc__label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--c-muted);
}
.page-faq .faq-toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 4px;
  scrollbar-width: thin;
}
.page-faq .faq-toc__list > li {
  flex: none;
}
.page-faq .faq-toc__link {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 8px 14px;
  border: 1px solid transparent;
  border-radius: var(--r-pill);
  color: var(--c-text);
  font-size: 14px;
  white-space: nowrap;
  transition: border-color var(--t-fast), background var(--t-fast), color var(--t-fast);
}
.page-faq .faq-toc__idx {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-data);
}
.page-faq .faq-toc__link:hover,
.page-faq .faq-toc__link:focus-visible {
  border-color: var(--c-accent);
  background: var(--faq-wash);
  color: var(--c-accent-soft);
}

@media (min-width: 1000px) {
  .page-faq .faq-manual__grid {
    grid-template-columns: var(--faq-side) minmax(0, 1fr);
    gap: 52px;
    align-items: start;
  }
  .page-faq .faq-toc {
    position: sticky;
    top: calc(var(--bar-h) + 22px);
  }
  .page-faq .faq-toc__list {
    display: grid;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }
  .page-faq .faq-toc__link {
    border-radius: var(--r-soft);
  }
}

/* 分组 */
.page-faq .faq-group {
  scroll-margin-top: calc(var(--bar-h) + 26px);
}
.page-faq .faq-group + .faq-group {
  margin-top: 54px;
}
.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 14px;
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--c-line);
}
.page-faq .faq-group__idx {
  grid-row: 1 / span 2;
  padding-top: 7px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--c-accent);
}
.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(22px, 2.6vw, 30px);
  font-weight: 900;
  letter-spacing: -.01em;
}
.page-faq .faq-group__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-muted);
}

/* 折叠问答 */
.page-faq .faq-item {
  border: 1px solid var(--c-line);
  border-radius: var(--r-soft);
  background: var(--c-surface);
  transition: border-color var(--t-fast), transform var(--t-fast);
}
.page-faq .faq-item + .faq-item {
  margin-top: 12px;
}
.page-faq .faq-item:hover {
  transform: translateY(-2px);
}
.page-faq .faq-item[open] {
  border-color: var(--c-accent);
}
.page-faq .faq-item > summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 17px 20px;
}
.page-faq .faq-item > summary::-webkit-details-marker {
  display: none;
}
.page-faq .faq-item > summary:focus-visible {
  outline: 2px solid var(--c-accent);
  outline-offset: -2px;
  border-radius: var(--r-soft);
}
.page-faq .faq-item__q {
  flex: 1;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--c-text);
}
.page-faq .faq-item__mark {
  position: relative;
  flex: none;
  width: 18px;
  height: 18px;
  margin-top: 5px;
}
.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  background: var(--c-accent);
  border-radius: 2px;
}
.page-faq .faq-item__mark::before {
  left: 0;
  top: 8px;
  width: 18px;
  height: 2px;
}
.page-faq .faq-item__mark::after {
  left: 8px;
  top: 0;
  width: 2px;
  height: 18px;
  transition: transform var(--t-fast);
}
.page-faq .faq-item[open] .faq-item__mark::after {
  transform: scaleY(0);
}
.page-faq .faq-item__body {
  padding: 2px 20px 22px;
  border-top: 1px solid var(--c-line);
}
.page-faq .faq-item__body > .faq-item__p:first-child {
  margin-top: 16px;
}
.page-faq .faq-item__p {
  margin: 16px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--c-text);
}
.page-faq .faq-item__link {
  color: var(--c-accent-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

/* 步骤 */
.page-faq .steps {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}
.page-faq .steps__item {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
}
.page-faq .steps__n {
  width: 26px;
  height: 26px;
  margin-top: 2px;
  display: grid;
  place-items: center;
  border: 1px solid var(--c-line);
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-accent);
}
.page-faq .steps__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--c-text);
}

/* 维度 / 档位 列表 */
.page-faq .faq-pick {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}
.page-faq .faq-pick__item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 12px 14px;
  border: 1px solid var(--c-line);
  border-radius: var(--r-soft);
  background: rgba(6, 11, 26, .55);
}
.page-faq .faq-pick__k {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--c-data);
}
.page-faq .faq-pick__v {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-muted);
}

@media (min-width: 560px) {
  .page-faq .faq-pick__item {
    grid-template-columns: 108px minmax(0, 1fr);
    gap: 16px;
    align-items: baseline;
  }
}

/* 档位表微调 */
.page-faq .ledger {
  margin: 16px 0 0;
}

/* ---------- 底部示意 ---------- */
.page-faq .faq-map {
  padding: clamp(36px, 5vw, 62px) 0 clamp(44px, 6vw, 84px);
  border-top: 1px solid var(--c-line);
}
.page-faq .faq-map__head {
  max-width: 44em;
  margin-bottom: 28px;
}
.page-faq .faq-map__idx {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--c-alert);
}
.page-faq .faq-map__head h2 {
  margin: 10px 0 10px;
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 900;
  letter-spacing: -.01em;
}
.page-faq .faq-map__head p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-muted);
}

.page-faq .flowmap {
  position: relative;
}
.page-faq .flowmap__in {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}
.page-faq .flowmap__stage {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}
.page-faq .flowmap__node {
  display: block;
  cursor: pointer;
  padding: 20px;
  border: 1px solid var(--c-line);
  border-radius: var(--r-card);
  background: var(--c-surface);
  transition: border-color var(--t-fast), background var(--t-fast), transform var(--t-fast);
}
.page-faq .flowmap__node:hover {
  transform: translateY(-2px);
}
.page-faq .flowmap__num {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--c-muted);
  transition: color var(--t-fast);
}
.page-faq .flowmap__node strong {
  display: block;
  margin-bottom: 6px;
  font-size: 17px;
  font-weight: 900;
  letter-spacing: -.01em;
}
.page-faq .flowmap__hint {
  font-size: 13px;
  color: var(--c-muted);
}

@media (min-width: 760px) {
  .page-faq .flowmap__stage {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }
}

.page-faq #fq-step-1:checked ~ .flowmap__stage .flowmap__node--1,
.page-faq #fq-step-2:checked ~ .flowmap__stage .flowmap__node--2,
.page-faq #fq-step-3:checked ~ .flowmap__stage .flowmap__node--3 {
  border-color: var(--c-accent);
  background: var(--faq-wash);
}
.page-faq #fq-step-1:checked ~ .flowmap__stage .flowmap__node--1 .flowmap__num,
.page-faq #fq-step-2:checked ~ .flowmap__stage .flowmap__node--2 .flowmap__num,
.page-faq #fq-step-3:checked ~ .flowmap__stage .flowmap__node--3 .flowmap__num {
  color: var(--c-accent);
}

.page-faq .flowmap__panes {
  margin-top: 18px;
}
.page-faq .flowmap__pane {
  display: none;
  margin: 0;
  padding: 16px 20px;
  border-left: 2px solid var(--c-accent);
  border-radius: 0 var(--r-soft) var(--r-soft) 0;
  background: var(--faq-wash-soft);
  font-size: 15px;
  line-height: 1.85;
  color: var(--c-text);
}
.page-faq #fq-step-1:checked ~ .flowmap__panes .flowmap__pane--1,
.page-faq #fq-step-2:checked ~ .flowmap__panes .flowmap__pane--2,
.page-faq #fq-step-3:checked ~ .flowmap__panes .flowmap__pane--3 {
  display: block;
}

.page-faq .faq-map__figure {
  margin: 30px 0 0;
  border: 1px solid var(--c-line);
  border-radius: var(--r-card);
  overflow: hidden;
  background: var(--c-surface);
}
.page-faq .faq-map__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 12 / 7;
  object-fit: cover;
}

.page-faq .faq-next {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px 24px;
  margin-top: 30px;
  padding-top: 24px;
  border-top: 1px dashed var(--c-line);
}
.page-faq .faq-next__alt {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-muted);
}
.page-faq .faq-next__alt a {
  color: var(--c-accent-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .flowmap__node,
  .page-faq .faq-toc__link,
  .page-faq .faq-item__mark::after {
    transition: none;
  }
  .page-faq .faq-item:hover,
  .page-faq .flowmap__node:hover {
    transform: none;
  }
}