/* ============ 使用答疑 / page-faq ============ */
.page-faq {
  --faq-rule: rgba(46, 211, 206, .30);
  --faq-tint: rgba(46, 211, 206, .055);
  --faq-tint-strong: rgba(46, 211, 206, .10);
  --faq-index-w: 250px;
}

.page-faq .breadcrumbs {
  margin-top: clamp(1.25rem, 3vw, 2rem);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding-block: clamp(1.75rem, 4.5vw, 3.25rem) clamp(1.5rem, 4vw, 2.5rem);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: min(340px, 58%);
  height: 2px;
  background: linear-gradient(90deg, var(--orange), var(--cyan));
}

.page-faq .faq-hero .eyebrow {
  margin-bottom: .9rem;
}

.page-faq .faq-hero h1 {
  margin: 0;
  max-width: 20ch;
  font-size: clamp(2rem, 5.6vw, 3.6rem);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -.02em;
  color: var(--mist);
}

.page-faq .faq-hero .lede {
  margin: clamp(1rem, 2.5vw, 1.5rem) 0 0;
  max-width: 62ch;
}

/* ---------- 分组跳转标签 ---------- */
.page-faq .faq-jump {
  display: flex;
  flex-wrap: wrap;
  gap: .45rem;
  margin-top: clamp(1.5rem, 4vw, 2.25rem);
}

.page-faq .faq-jump a {
  display: inline-block;
  padding: .5rem .8rem;
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .06em;
  color: var(--silver);
  text-decoration: none;
  border: 1px solid var(--line);
  background: var(--graphite);
  clip-path: polygon(0 0, calc(100% - 9px) 0, 100% 9px, 100% 100%, 9px 100%, 0 calc(100% - 9px));
  transition: color .18s var(--ease), border-color .18s var(--ease), background-color .18s var(--ease);
}

.page-faq .faq-jump a:hover,
.page-faq .faq-jump a:focus-visible {
  color: var(--cyan);
  border-color: var(--faq-rule);
  background: var(--cyan-deep);
}

/* ---------- 两段式布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 4vw, 3.25rem);
  padding-block: clamp(2rem, 5vw, 3.5rem);
}

.page-faq .faq-index {
  display: none;
}

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

  .page-faq .faq-index {
    display: block;
    position: sticky;
    top: 6.5rem;
    align-self: start;
    max-height: calc(100vh - 8.5rem);
    overflow-y: auto;
    padding-right: .5rem;
    border-right: 1px solid var(--line);
  }
}

.page-faq .faq-index__title {
  margin: 0;
  font-size: .68rem;
  letter-spacing: .16em;
  color: var(--gray);
  text-transform: uppercase;
  padding-left: .25rem;
}

.page-faq .faq-index__list {
  list-style: none;
  margin: .85rem 0 0;
  padding: 0 0 .5rem;
}

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

.page-faq .faq-index__list li:first-child {
  border-top: 0;
}

.page-faq .faq-index__list a {
  display: flex;
  gap: .55rem;
  padding: .45rem .25rem;
  font-size: .82rem;
  line-height: 1.5;
  color: var(--gray);
  text-decoration: none;
  transition: color .16s var(--ease), padding-left .16s var(--ease);
}

.page-faq .faq-index__list a .mono {
  flex: none;
  font-size: .7rem;
  padding-top: .16rem;
  color: var(--gray);
  transition: color .16s var(--ease);
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  color: var(--silver);
  padding-left: .65rem;
}

.page-faq .faq-index__list a:hover .mono,
.page-faq .faq-index__list a:focus-visible .mono {
  color: var(--cyan);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: 7rem;
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(2.25rem, 5vw, 3.5rem);
  padding-top: clamp(1.5rem, 3.5vw, 2.25rem);
  border-top: 1px solid var(--faq-rule);
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: .85rem;
  margin-bottom: 1.1rem;
}

.page-faq .faq-group__num {
  font-size: .78rem;
  letter-spacing: .1em;
  color: var(--cyan);
  flex: none;
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(1.15rem, 2.4vw, 1.55rem);
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--mist);
}

.page-faq .faq-group__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

@media (min-width: 780px) {
  .page-faq .faq-group__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 300px);
    align-items: start;
    gap: 2rem;
  }
}

/* ---------- 问答条目 ---------- */
.page-faq .faq-list {
  border-top: 1px solid var(--line);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--line);
  scroll-margin-top: 7rem;
  transition: background-color .2s var(--ease);
}

.page-faq .faq-item[open] {
  background: var(--faq-tint);
}

.page-faq .faq-item > summary {
  display: flex;
  align-items: flex-start;
  gap: .7rem;
  padding: .9rem .5rem;
  cursor: pointer;
  list-style: none;
  font-size: .98rem;
  font-weight: 500;
  line-height: 1.55;
  color: var(--silver);
  transition: color .18s var(--ease), background-color .18s var(--ease);
}

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

.page-faq .faq-item > summary::after {
  content: "+";
  margin-left: auto;
  padding-left: 1rem;
  flex: none;
  font-family: var(--mono);
  font-size: 1rem;
  line-height: 1.4;
  color: var(--cyan);
  transition: transform .2s var(--ease), color .2s var(--ease);
}

.page-faq .faq-item[open] > summary::after {
  transform: rotate(45deg);
  color: var(--orange);
}

.page-faq .faq-item > summary:hover {
  color: var(--mist);
  background: var(--faq-tint-strong);
}

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

.page-faq .faq-item__num {
  flex: none;
  min-width: 2.2rem;
  padding-top: .22rem;
  font-size: .7rem;
  letter-spacing: .06em;
  color: var(--gray);
  transition: color .18s var(--ease);
}

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

.page-faq .faq-item__ans {
  padding: .1rem 1rem 1.1rem 2.9rem;
  font-size: .93rem;
  line-height: 1.85;
  color: var(--silver);
}

.page-faq .faq-item__ans p {
  margin: 0;
}

@media (min-width: 640px) {
  .page-faq .faq-item__ans {
    padding: .15rem 2rem 1.25rem 3.35rem;
  }
}

.page-faq .hl-cyan {
  font-family: var(--mono);
  font-size: .95em;
  color: var(--cyan);
}

.page-faq .hl-orange {
  font-family: var(--mono);
  font-size: .95em;
  color: var(--orange);
}

.page-faq .faq-inline-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--faq-rule);
  transition: color .16s var(--ease), border-color .16s var(--ease);
}

.page-faq .faq-inline-link:hover {
  color: var(--mist);
  border-color: var(--mist);
}

/* ---------- 图片块 ---------- */
.page-faq .faq-media {
  margin: 0 0 1.25rem;
  background: var(--graphite);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 18px 100%, 0 calc(100% - 18px));
  overflow: hidden;
}

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

.page-faq .faq-media__cap {
  display: block;
  padding: .6rem .9rem;
  border-top: 1px solid var(--line);
  font-size: .72rem;
  line-height: 1.5;
  color: var(--gray);
}

.page-faq .faq-media__cap .mono {
  margin-right: .5rem;
  color: var(--cyan);
  letter-spacing: .08em;
}

.page-faq .faq-media--square {
  margin-bottom: 0;
}

@media (min-width: 780px) {
  .page-faq .faq-media--wide {
    margin-bottom: 1.75rem;
  }
}

/* ---------- 指南章节索引 ---------- */
.page-faq .guide-chapters {
  list-style: none;
  margin: 0 0 1.75rem;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  scroll-margin-top: 7rem;
}

@media (min-width: 700px) {
  .page-faq .guide-chapters {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1100px) {
  .page-faq .guide-chapters {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }
}

.page-faq .guide-chapters li {
  display: flex;
  flex-direction: column;
  gap: .35rem;
  padding: .85rem .9rem;
  background: var(--ink);
  font-size: .84rem;
  line-height: 1.4;
  color: var(--silver);
}

.page-faq .guide-chapters li .mono {
  font-size: .68rem;
  letter-spacing: .1em;
  color: var(--cyan);
}

/* ---------- 人工帮助 ---------- */
.page-faq .faq-help {
  margin-top: clamp(2.5rem, 6vw, 4rem);
  padding: clamp(1.5rem, 4vw, 2.75rem);
  background: var(--graphite);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, calc(100% - 26px) 0, 100% 26px, 100% 100%, 26px 100%, 0 calc(100% - 26px));
  scroll-margin-top: 7rem;
}

.page-faq .faq-help .eyebrow {
  margin-bottom: .8rem;
}

.page-faq .faq-help__title {
  margin: 0;
  font-size: clamp(1.35rem, 3vw, 2rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -.01em;
  color: var(--mist);
}

.page-faq .faq-help__text {
  margin: 1rem 0 0;
  max-width: 62ch;
  font-size: .95rem;
  line-height: 1.85;
  color: var(--silver);
}

.page-faq .faq-help__channels {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 1.75rem 0 0;
  background: var(--line);
  border: 1px solid var(--line);
}

@media (min-width: 640px) {
  .page-faq .faq-help__channels {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-faq .faq-help__channels > div {
  padding: .95rem 1.1rem;
  background: var(--ink);
}

.page-faq .faq-help__channels dt {
  margin: 0 0 .35rem;
  font-size: .68rem;
  letter-spacing: .14em;
  color: var(--gray);
}

.page-faq .faq-help__channels dd {
  margin: 0;
  font-family: var(--mono);
  font-size: .88rem;
  line-height: 1.5;
  color: var(--cyan);
  word-break: break-all;
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .65rem;
  margin-top: 1.75rem;
}

.page-faq .faq-help__note {
  margin: 1.25rem 0 0;
  font-size: .82rem;
  line-height: 1.8;
  color: var(--gray);
}