.page-faq {
  --fq-ink: #141C33;
  --fq-idx-w: 216px;
  color: var(--paper);
  background: var(--void);
  font-family: var(--f-body);
  font-size: 16px;
  line-height: 1.75;
  padding: calc(var(--bar-h) + 26px) 18px 88px;
}

.page-faq * ,
.page-faq *::before,
.page-faq *::after {
  box-sizing: border-box;
}

.page-faq .fq-top,
.page-faq .fq-main {
  max-width: 1180px;
  margin-left: auto;
  margin-right: auto;
}

/* ---------- 首屏 ---------- */
.page-faq .fq-hero {
  display: grid;
  gap: 24px;
  margin-top: 26px;
}

.page-faq .fq-hero__title {
  margin: 14px 0 0;
  font-family: var(--f-display);
  font-weight: 700;
  font-stretch: 92%;
  letter-spacing: -0.02em;
  font-size: clamp(29px, 6.2vw, 52px);
  line-height: 1.14;
  color: var(--paper-bright);
}

.page-faq .fq-hero__lede {
  margin: 16px 0 0;
  max-width: 34em;
  font-family: var(--f-serif);
  font-size: clamp(16px, 2.3vw, 21px);
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .fq-hero__side {
  border: 1px solid var(--line);
  background: var(--panel);
  padding: 18px 20px 20px;
  clip-path: polygon(var(--cut) 0, 100% 0, 100% 100%, 0 100%, 0 var(--cut));
}

.page-faq .fq-hero__side-label {
  margin: 0 0 12px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.page-faq .fq-stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .fq-stats li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding-bottom: 9px;
  border-bottom: 1px dashed var(--line);
}

.page-faq .fq-stats li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-faq .fq-stats__num {
  font-family: var(--f-mono);
  font-variant-numeric: tabular-nums;
  font-size: 22px;
  font-weight: 700;
  color: var(--cyan);
  min-width: 76px;
}

.page-faq .fq-stats__lbl {
  font-size: 13.5px;
  color: var(--muted);
}

.page-faq .fq-hero__side-note {
  margin: 14px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 分隔线 ---------- */
.page-faq .fq-rule {
  position: relative;
  height: 1px;
  margin: 48px 0 0;
  background: linear-gradient(90deg, var(--cyan) 0 72px, var(--line) 72px 100%);
}

.page-faq .fq-rule::after {
  content: "";
  position: absolute;
  right: 0;
  top: -3px;
  width: 7px;
  height: 7px;
  background: var(--cyan);
  transform: rotate(45deg);
}

/* ---------- 分类入口 ---------- */
.page-faq .fq-cats {
  margin-top: 44px;
}

.page-faq .fq-cats__title {
  margin: 12px 0 0;
  font-family: var(--f-display);
  font-weight: 700;
  font-stretch: 94%;
  letter-spacing: -0.015em;
  font-size: clamp(21px, 3.6vw, 30px);
  line-height: 1.25;
  color: var(--paper-bright);
}

.page-faq .fq-cats__lede {
  margin: 10px 0 0;
  font-size: 15px;
  color: var(--muted);
}

.page-faq .fq-cats__grid {
  margin-top: 22px;
  display: grid;
  gap: 24px;
}

.page-faq .fq-cats__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .fq-cat {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 14px;
  padding: 15px 18px;
  text-decoration: none;
  color: var(--paper);
  background: var(--panel);
  border: 1px solid var(--line);
  clip-path: polygon(var(--cut) 0, 100% 0, 100% 100%, 0 100%, 0 var(--cut));
  transition: border-color 160ms var(--ease), transform 160ms var(--ease),
    background-color 160ms var(--ease);
}

.page-faq .fq-cat:hover,
.page-faq .fq-cat:focus-visible {
  border-color: var(--cyan);
  background: #111c3a;
  transform: translateY(-2px);
}

.page-faq .fq-cat:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-faq .fq-cat__idx {
  font-family: var(--f-mono);
  font-variant-numeric: tabular-nums;
  font-size: 15px;
  font-weight: 700;
  color: var(--violet);
  flex: none;
}

.page-faq .fq-cat__txt {
  flex: 1 1 170px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.page-faq .fq-cat__name {
  font-family: var(--f-display);
  font-weight: 700;
  font-size: 16.5px;
  line-height: 1.4;
  color: var(--paper-bright);
}

.page-faq .fq-cat__desc {
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

.page-faq .fq-cat__freq {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  flex: none;
}

.page-faq .fq-freq {
  display: inline-flex;
  gap: 3px;
}

.page-faq .fq-freq i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--line);
}

.page-faq .fq-freq--3 i {
  background: var(--cyan);
}

.page-faq .fq-freq--2 i:nth-child(-n + 2) {
  background: var(--cyan);
}

.page-faq .fq-freq--1 i:nth-child(1) {
  background: var(--cyan);
}

.page-faq .fq-cat__freqtxt {
  font-family: var(--f-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-faq .fq-cats__fig {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--panel);
  clip-path: polygon(0 0, 100% 0, 100% 100%, var(--cut) 100%, 0 calc(100% - var(--cut)));
  overflow: hidden;
}

.page-faq .fq-cats__fig img,
.page-faq .fq-fig img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-faq .fq-cats__cap {
  padding: 11px 16px 14px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 主体：索引 + 折叠流 ---------- */
.page-faq .fq-main {
  margin-top: 56px;
  display: grid;
  gap: 26px;
}

.page-faq .fq-index {
  position: sticky;
  top: var(--bar-h);
  z-index: 6;
  background: var(--void);
  padding: 8px 0 10px;
  border-bottom: 1px solid var(--line);
}

.page-faq .fq-index__cap {
  display: none;
  margin: 0 0 10px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.page-faq .fq-index__list {
  list-style: none;
  margin: 0;
  padding: 0 0 2px;
  display: flex;
  gap: 6px;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-faq .fq-index__list::-webkit-scrollbar {
  display: none;
}

.page-faq .fq-index__list li {
  flex: none;
}

.page-faq .fq-index__list a {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 7px 12px;
  border: 1px solid var(--line);
  color: var(--muted);
  text-decoration: none;
  font-size: 13.5px;
  white-space: nowrap;
  transition: color 160ms var(--ease), border-color 160ms var(--ease),
    background-color 160ms var(--ease);
}

.page-faq .fq-index__list a span {
  font-family: var(--f-mono);
  font-variant-numeric: tabular-nums;
  font-size: 11.5px;
  color: var(--violet);
}

.page-faq .fq-index__list a:hover,
.page-faq .fq-index__list a:focus-visible {
  color: var(--paper-bright);
  border-color: var(--cyan);
  background: var(--panel);
}

.page-faq .fq-index__list a:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-faq .fq-flow {
  min-width: 0;
}

/* ---------- 分组 ---------- */
.page-faq .fq-group {
  scroll-margin-top: calc(var(--bar-h) + 76px);
}

.page-faq .fq-group + .fq-group {
  margin-top: 58px;
  padding-top: 44px;
  border-top: 1px solid var(--line);
}

.page-faq .fq-group__head {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px 14px;
  align-items: baseline;
  margin-bottom: 20px;
}

.page-faq .fq-group__num {
  font-family: var(--f-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(34px, 8vw, 52px);
  font-weight: 700;
  line-height: 0.9;
  color: var(--violet);
}

.page-faq .fq-group__title {
  margin: 0;
  font-family: var(--f-display);
  font-weight: 700;
  font-stretch: 94%;
  letter-spacing: -0.012em;
  font-size: clamp(19px, 3.4vw, 26px);
  line-height: 1.3;
  color: var(--paper-bright);
}

.page-faq .fq-group__lede {
  grid-column: 1 / -1;
  margin: 6px 0 0;
  font-family: var(--f-serif);
  font-size: 15.5px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 折叠问答 ---------- */
.page-faq .fq-qa {
  display: grid;
  gap: 10px;
}

.page-faq .fq-item {
  border: 1px solid var(--line);
  background: #0b1329;
  clip-path: polygon(var(--cut) 0, 100% 0, 100% 100%, 0 100%, 0 var(--cut));
  transition: border-color 160ms var(--ease);
}

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

.page-faq .fq-item__q {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 15px 18px;
  cursor: pointer;
  list-style: none;
  color: var(--paper);
  transition: color 160ms var(--ease);
}

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

.page-faq .fq-item__q:hover,
.page-faq .fq-item__q:focus-visible {
  color: var(--paper-bright);
}

.page-faq .fq-item__q:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -3px;
}

.page-faq .fq-item__no {
  flex: none;
  font-family: var(--f-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12.5px;
  color: var(--violet);
}

.page-faq .fq-item__text {
  flex: 1 1 auto;
  min-width: 0;
  font-family: var(--f-display);
  font-weight: 700;
  font-size: 16px;
  line-height: 1.55;
}

.page-faq .fq-item__mark {
  position: relative;
  flex: none;
  align-self: center;
  width: 13px;
  height: 13px;
  margin-left: auto;
}

.page-faq .fq-item__mark::before,
.page-faq .fq-item__mark::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  transition: opacity 160ms var(--ease), transform 160ms var(--ease);
}

.page-faq .fq-item__mark::before {
  left: 0;
  right: 0;
  top: 50%;
  height: 2px;
  margin-top: -1px;
}

.page-faq .fq-item__mark::after {
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  margin-left: -1px;
}

.page-faq .fq-item[open] .fq-item__mark::after {
  opacity: 0;
  transform: rotate(90deg);
}

/* ---------- 答案：暖纸白块 ---------- */
.page-faq .fq-item__body {
  background: var(--paper);
  color: var(--fq-ink);
  padding: 17px 18px 20px;
  font-size: 15px;
  line-height: 1.8;
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
}

.page-faq .fq-item__body p {
  margin: 0;
}

.page-faq .fq-item__body p + p {
  margin-top: 10px;
}

.page-faq .fq-item__body a {
  color: #9a3700;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .fq-item__body a:hover,
.page-faq .fq-item__body a:focus-visible {
  color: #6d2700;
}

.page-faq .fq-item__body a:focus-visible {
  outline: 2px solid #6d2700;
  outline-offset: 2px;
}

.page-faq .fq-steps {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .fq-steps li {
  display: grid;
  grid-template-columns: 24px 1fr;
  gap: 10px;
  font-size: 14.5px;
  line-height: 1.7;
}

.page-faq .fq-steps li > span {
  font-family: var(--f-mono);
  font-variant-numeric: tabular-nums;
  font-size: 11.5px;
  line-height: 2.1;
  color: #4b3bc4;
}

/* ---------- 章节内图片 ---------- */
.page-faq .fq-fig {
  margin: 20px 0 0;
  max-width: 440px;
  border: 1px solid var(--line);
  background: var(--panel);
  clip-path: polygon(var(--cut) 0, 100% 0, 100% 100%, 0 100%, 0 var(--cut));
  overflow: hidden;
}

.page-faq .fq-fig__cap {
  padding: 10px 15px 13px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 反馈区 ---------- */
.page-faq .fq-help {
  display: grid;
  gap: 12px;
}

.page-faq .fq-help__card {
  border: 1px solid var(--line);
  background: var(--panel);
  padding: 18px 20px 20px;
  clip-path: polygon(var(--cut) 0, 100% 0, 100% 100%, 0 100%, 0 var(--cut));
}

.page-faq .fq-help__card--accent {
  background: linear-gradient(135deg, #1a1246 0%, #0e1730 62%);
  border-color: #2c2a72;
}

.page-faq .fq-help__label {
  margin: 0 0 10px;
  font-family: var(--f-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-faq .fq-help__mail {
  margin: 0;
  font-family: var(--f-mono);
  font-size: clamp(15px, 3.4vw, 19px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--paper-bright);
  word-break: break-all;
}

.page-faq .fq-help__note {
  margin: 12px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .fq-help__note a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .fq-help__note a:hover,
.page-faq .fq-help__note a:focus-visible {
  color: var(--paper-bright);
}

.page-faq .fq-help__note a:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-faq .fq-help .fq-steps {
  margin-top: 0;
}

.page-faq .fq-help .fq-steps li {
  color: var(--paper);
}

.page-faq .fq-help .fq-steps li > span {
  color: var(--violet);
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-faq .fq-cats__list {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 960px) {
  .page-faq {
    padding: calc(var(--bar-h) + 44px) 40px 110px calc(var(--rail-w) + 36px);
  }

  .page-faq .fq-hero {
    grid-template-columns: minmax(0, 1fr) 288px;
    gap: 40px;
    align-items: end;
    margin-top: 30px;
  }

  .page-faq .fq-cats__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 32px;
    align-items: start;
  }

  .page-faq .fq-cats__list {
    grid-template-columns: 1fr;
  }

  .page-faq .fq-main {
    grid-template-columns: var(--fq-idx-w) minmax(0, 1fr);
    gap: 48px;
    margin-top: 72px;
  }

  .page-faq .fq-index {
    position: sticky;
    top: calc(var(--bar-h) + 28px);
    align-self: start;
    z-index: 1;
    padding: 0;
    border-bottom: 0;
    border-left: 1px solid var(--line);
  }

  .page-faq .fq-index__cap {
    display: block;
    padding-left: 12px;
  }

  .page-faq .fq-index__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .fq-index__list li {
    flex: 1 1 auto;
  }

  .page-faq .fq-index__list a {
    display: flex;
    width: 100%;
    border: 0;
    border-left: 2px solid transparent;
    margin-left: -1px;
    padding: 9px 12px;
    font-size: 14px;
    white-space: normal;
  }

  .page-faq .fq-index__list a:hover,
  .page-faq .fq-index__list a:focus-visible {
    border-left-color: var(--cyan);
    border-top-color: transparent;
    border-right-color: transparent;
    border-bottom-color: transparent;
    background: transparent;
  }

  .page-faq .fq-help {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 16px;
    align-items: start;
  }

  .page-faq .fq-item__q {
    padding: 17px 22px;
  }

  .page-faq .fq-item__body {
    padding: 20px 22px 22px;
    font-size: 15.5px;
  }
}

@media (min-width: 1200px) {
  .page-faq .fq-group__lede {
    font-size: 16.5px;
  }
}
</