.page-faq {
  --faq-index-w: 15rem;
  --faq-cut: 24px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding-block: clamp(1.5rem, 5vw, 3.25rem) clamp(1.5rem, 4vw, 2.5rem);
}

.page-faq .faq-hero h1 {
  margin: 0.6rem 0 1rem;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.85rem, 6.4vw, 3.35rem);
  line-height: 1.22;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-faq .faq-hero .lead {
  max-width: var(--measure);
  color: var(--charcoal);
  font-size: var(--fs-16);
  line-height: 1.85;
}

.page-faq .faq-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.75rem;
  margin: 1.75rem 0 0;
  padding: 0.9rem 0 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-faq .faq-facts li {
  display: flex;
  align-items: baseline;
  gap: 0.4rem;
  font-size: var(--fs-14);
  color: var(--muted);
}

.page-faq .faq-facts .mono {
  font-weight: 700;
  font-size: var(--fs-22);
  color: var(--cinnabar);
  letter-spacing: 0.02em;
}

/* ---------- 双栏骨架 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.75rem;
  align-items: start;
  padding-bottom: clamp(2rem, 5vw, 4rem);
}

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

@media (min-width: 900px) {
  .page-faq .faq-body {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    gap: 3.5rem;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 1.75rem;
  }
}

/* ---------- 分类索引 ---------- */
.page-faq .faq-index {
  border-top: 2px solid var(--ink);
  padding-top: 0.85rem;
}

.page-faq .faq-index__title {
  margin: 0 0 0.7rem;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.14em;
  color: var(--muted);
}

.page-faq .faq-index__list {
  display: flex;
  gap: 0.35rem;
  margin: 0;
  padding: 0 0 0.5rem;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-index__list li {
  flex: 0 0 auto;
}

.page-faq .faq-index__link {
  display: grid;
  grid-template-columns: 2.2ch 1fr auto;
  align-items: center;
  gap: 0.6rem;
  min-height: 2.6rem;
  padding: 0.5rem 0.7rem;
  font-size: var(--fs-14);
  color: var(--charcoal);
  text-decoration: none;
  white-space: nowrap;
  border-bottom: 3px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-faq .faq-index__link .mono {
  font-size: var(--fs-12);
  color: var(--cinnabar);
  letter-spacing: 0.04em;
}

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

@media (min-width: 900px) {
  .page-faq .faq-index__list {
    display: block;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-index__list li + li {
    margin-top: 0.15rem;
  }

  .page-faq .faq-index__link {
    border-bottom: 0;
    border-left: 3px solid transparent;
    white-space: normal;
    padding-left: 0.75rem;
  }
}

/* ---------- 分组标题 ---------- */
.page-faq .faq-group {
  padding-block: clamp(1.5rem, 3vw, 2.25rem);
  border-top: 1px solid var(--line);
}

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

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  margin-bottom: 1rem;
}

.page-faq .faq-group__num {
  font-size: var(--fs-14);
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--cinnabar);
}

.page-faq .faq-group__head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.25rem, 3.2vw, 1.6rem);
  color: var(--ink);
}

.page-faq .faq-group__count {
  margin-left: auto;
  font-size: var(--fs-12);
  color: var(--muted);
  letter-spacing: 0.04em;
}

/* ---------- 问答折叠 ---------- */
.page-faq .qa {
  border-top: 1px solid var(--line);
}

.page-faq .qa:last-of-type {
  border-bottom: 1px solid var(--line);
}

.page-faq .qa__q {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.9rem 0;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .qa__q:focus-visible {
  outline: 2px solid var(--cinnabar);
  outline-offset: 3px;
}

.page-faq .qa__num {
  flex: 0 0 auto;
  display: inline-grid;
  place-items: center;
  min-width: 2.4rem;
  height: 1.6rem;
  padding: 0 0.35rem;
  font-size: var(--fs-12);
  letter-spacing: 0.04em;
  color: var(--night-text);
  background: var(--ink);
  clip-path: polygon(6px 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%, 0 6px);
}

.page-faq .qa__title {
  flex: 1 1 auto;
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--fs-16);
  font-weight: 600;
  line-height: 1.6;
  color: var(--ink);
  transition: color 0.2s var(--ease);
}

.page-faq .qa[open] .qa__title {
  color: var(--cinnabar-deep);
}

.page-faq .qa__mark {
  position: relative;
  flex: 0 0 auto;
  width: 1rem;
  height: 1rem;
}

.page-faq .qa__mark::before,
.page-faq .qa__mark::after {
  content: "";
  position: absolute;
  background: var(--cinnabar);
  transition: transform 0.24s var(--ease), opacity 0.24s var(--ease);
}

.page-faq .qa__mark::before {
  left: 0;
  right: 0;
  top: calc(50% - 1px);
  height: 2px;
}

.page-faq .qa__mark::after {
  top: 0;
  bottom: 0;
  left: calc(50% - 1px);
  width: 2px;
}

.page-faq .qa[open] .qa__mark::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .qa__a {
  padding: 0 0 1.15rem 3.2rem;
  font-size: var(--fs-16);
  line-height: 1.85;
  color: var(--charcoal);
  animation: faq-answer-in 0.24s var(--ease) both;
}

.page-faq .qa__a p {
  margin: 0;
  max-width: var(--measure);
}

@keyframes faq-answer-in {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@media (max-width: 599px) {
  .page-faq .qa__a {
    padding-left: 0;
  }
}

/* 站内路径标注 */
.page-faq .path {
  padding: 0.05em 0.32em;
  background: var(--bamboo-pale);
  color: var(--bamboo);
  font-weight: 600;
}

/* ---------- 时间线 ---------- */
.page-faq .faq-shot {
  margin: 0 0 1.5rem;
}

.page-faq .faq-shot img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 11 / 6;
  object-fit: cover;
  background: var(--warm-bg);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 28px), calc(100% - 28px) 100%, 0 100%);
}

.page-faq .faq-shot figcaption {
  margin-top: 0.55rem;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.04em;
  color: var(--muted);
}

.page-faq .faq-timeline__title {
  margin: 0 0 0.9rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-18);
  color: var(--ink);
}

.page-faq .timeline {
  margin-bottom: 1.25rem;
  overflow-x: auto;
  padding: 0.35rem 0.25rem 1rem;
  scroll-snap-type: x proximity;
  scrollbar-width: thin;
}

.page-faq .timeline__track {
  display: flex;
  gap: 0.85rem;
  min-width: min-content;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .tl {
  flex: 0 0 clamp(11.5rem, 58vw, 15rem);
  scroll-snap-align: start;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  padding: 0.85rem 0.9rem 1rem;
  background: var(--paper);
  border: 1px solid var(--line);
  border-top: 3px solid var(--bamboo);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
}

.page-faq .tl--now {
  border-top-color: var(--gold);
  animation: faq-pulse 2.6s ease-in-out infinite;
}

.page-faq .tl--next {
  background: transparent;
  border-top-color: var(--line);
}

.page-faq .tl__ver {
  align-self: flex-start;
  padding: 0.1rem 0.4rem;
  font-size: var(--fs-12);
  letter-spacing: 0.06em;
  color: var(--bamboo);
  border: 1px solid var(--bamboo-pale);
}

.page-faq .tl--now .tl__ver {
  color: var(--cinnabar-deep);
  border-color: var(--gold);
}

.page-faq .tl--next .tl__ver {
  color: var(--muted);
  border-color: var(--line);
}

.page-faq .tl__name {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--fs-16);
  font-weight: 700;
  color: var(--ink);
}

.page-faq .tl__desc {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .tl__state {
  margin-top: auto;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.06em;
  color: var(--bamboo);
}

.page-faq .tl--now .tl__state {
  color: var(--cinnabar);
}

.page-faq .tl--next .tl__state {
  color: var(--muted);
}

@keyframes faq-pulse {
  0%, 100% {
    box-shadow: 0 0 0 0 rgba(184, 145, 47, 0.34);
  }
  50% {
    box-shadow: 0 0 0 7px rgba(184, 145, 47, 0);
  }
}

.page-faq .faq-note {
  max-width: var(--measure);
  margin: 0 0 1.5rem;
  padding: 0.85rem 0 0.85rem 1rem;
  font-size: var(--fs-14);
  line-height: 1.85;
  color: var(--muted);
  border-left: 2px solid var(--gold);
}

/* ---------- 自查路径 ---------- */
.page-faq .faq-selfcheck {
  padding-block: clamp(1.75rem, 4vw, 2.75rem);
  border-top: 1px solid var(--line);
}

.page-faq .faq-selfcheck h2 {
  margin: 0.5rem 0 0.4rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.35rem, 3.6vw, 1.9rem);
  color: var(--ink);
}

.page-faq .faq-selfcheck__lead {
  max-width: var(--measure);
  margin: 0;
  font-size: var(--fs-16);
  line-height: 1.85;
  color: var(--charcoal);
}

.page-faq .steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin: 1.4rem 0 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 720px) {
  .page-faq .steps {
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
  }
}

.page-faq .faq-step {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  padding: 1.15rem 1.15rem 1.25rem;
  background: var(--paper);
  border: 1px solid var(--line);
  clip-path: polygon(18px 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%, 0 18px);
}

.page-faq .faq-step__num {
  font-size: var(--fs-12);
  letter-spacing: 0.12em;
  color: var(--bamboo);
}

.page-faq .faq-step h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-18);
  color: var(--ink);
}

.page-faq .faq-step p {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--charcoal);
}

.page-faq .faq-step .btn {
  align-self: flex-start;
  margin-top: auto;
}

/* ---------- 人工支持 ---------- */
.page-faq .faq-support {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.75rem;
  padding-block: clamp(1.75rem, 4vw, 3rem) clamp(2rem, 5vw, 3.5rem);
  border-top: 1px solid var(--line);
}

@media (min-width: 860px) {
  .page-faq .faq-support {
    grid-template-columns: 1.08fr 0.92fr;
    align-items: center;
    gap: 2.75rem;
  }
}

.page-faq .faq-support h2 {
  margin: 0.5rem 0 0.6rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.35rem, 3.6vw, 1.9rem);
  color: var(--ink);
}

.page-faq .faq-support__lead {
  max-width: var(--measure);
  margin: 0;
  font-size: var(--fs-16);
  line-height: 1.85;
  color: var(--charcoal);
}

.page-faq .support-list {
  display: grid;
  gap: 0.75rem;
  margin: 1.35rem 0 1.5rem;
  padding: 0;
  list-style: none;
}

.page-faq .support-list li {
  display: grid;
  grid-template-columns: 5.5rem 1fr;
  gap: 0.35rem 0.85rem;
  padding-bottom: 0.75rem;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--charcoal);
  border-bottom: 1px dashed var(--line);
}

.page-faq .support-list .mono {
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
  color: var(--bamboo);
  padding-top: 0.2rem;
}

@media (max-width: 479px) {
  .page-faq .support-list li {
    grid-template-columns: 1fr;
  }

  .page-faq .support-list .mono {
    padding-top: 0;
  }
}

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

.page-faq .faq-support__fig img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  background: var(--warm-bg);
  border: 1px solid var(--line);
  clip-path: polygon(20px 0, 100% 0, 100% 100%, 0 100%, 0 20px);
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .qa__a {
    animation: none;
  }

  .page-faq .qa__mark::before,
  .page-faq .qa__mark::after,
  .page-faq .faq-index__link,
  .page-faq .qa__title {
    transition: none;
  }

  .page-faq .tl--now {
    animation: none;
    box-shadow: 0 0 0 2px rgba(184, 145, 47, 0.5);
  }
}