.page-faq {
  --faq-cat-w: 178px;
  --faq-scale-w: 30px;
}

.page-faq .breadcrumb {
  margin: 26px 0 18px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding-bottom: 28px;
}

.page-faq .faq-hero__copy .eyebrow {
  color: var(--lime);
  letter-spacing: .18em;
}

.page-faq .faq-hero h1 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(29px, 6.2vw, 52px);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.005em;
  color: var(--ivory);
}

.page-faq .faq-hero__lede {
  margin: 16px 0 0;
  max-width: 40em;
  font-size: 17px;
  line-height: 1.78;
  color: rgba(255, 247, 232, .8);
}

.page-faq .faq-hero__media {
  margin: 6px 0 0;
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 24px), calc(100% - 24px) 100%, 0 100%);
  background: var(--deep);
}

.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 5;
  object-fit: cover;
}

/* ---------- 问题面板 ---------- */
.page-faq .faq-board {
  margin-top: 34px;
  padding-top: 26px;
  border-top: 2px solid var(--blue);
}

.page-faq .faq-radio {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.page-faq .faq-board__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
}

/* ---------- 分类标签 ---------- */
.page-faq .faq-cats {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 6px;
  scrollbar-width: none;
}

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

.page-faq .faq-cat {
  flex: 0 0 auto;
  padding: 9px 15px;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.2;
  color: var(--grey);
  background: rgba(6, 18, 14, .74);
  border: 1px solid var(--line);
  cursor: pointer;
  user-select: none;
  clip-path: polygon(9px 0, 100% 0, 100% calc(100% - 9px), calc(100% - 9px) 100%, 0 100%, 0 9px);
  transition: color .2s var(--ease), background .2s var(--ease), border-color .2s var(--ease);
}

.page-faq .faq-cat:hover {
  color: var(--ivory);
  border-color: var(--line-strong);
}

.page-faq .faq-radio:focus-visible ~ .faq-board__inner .faq-cat[for="faq-cat-all"],
.page-faq .faq-radio:focus-visible ~ .faq-board__inner .faq-cat[for="faq-cat-fee"],
.page-faq .faq-radio:focus-visible ~ .faq-board__inner .faq-cat[for="faq-cat-data"],
.page-faq .faq-radio:focus-visible ~ .faq-board__inner .faq-cat[for="faq-cat-sub"],
.page-faq .faq-radio:focus-visible ~ .faq-board__inner .faq-cat[for="faq-cat-device"],
.page-faq .faq-radio:focus-visible ~ .faq-board__inner .faq-cat[for="faq-cat-help"] {
  outline: 2px solid var(--lime);
  outline-offset: 2px;
}

.page-faq #faq-cat-all:checked ~ .faq-board__inner .faq-cat[for="faq-cat-all"],
.page-faq #faq-cat-fee:checked ~ .faq-board__inner .faq-cat[for="faq-cat-fee"],
.page-faq #faq-cat-data:checked ~ .faq-board__inner .faq-cat[for="faq-cat-data"],
.page-faq #faq-cat-sub:checked ~ .faq-board__inner .faq-cat[for="faq-cat-sub"],
.page-faq #faq-cat-device:checked ~ .faq-board__inner .faq-cat[for="faq-cat-device"],
.page-faq #faq-cat-help:checked ~ .faq-board__inner .faq-cat[for="faq-cat-help"] {
  color: var(--brown);
  background: var(--lime);
  border-color: var(--lime);
  box-shadow: var(--glow-lime);
}

/* ---------- 分组显示 ---------- */
.page-faq .faq-group {
  display: none;
}

.page-faq .faq-group + .faq-group {
  margin-top: 32px;
}

.page-faq #faq-cat-all:checked ~ .faq-board__inner .faq-group,
.page-faq #faq-cat-fee:checked ~ .faq-board__inner .faq-group[data-cat="fee"],
.page-faq #faq-cat-data:checked ~ .faq-board__inner .faq-group[data-cat="data"],
.page-faq #faq-cat-sub:checked ~ .faq-board__inner .faq-group[data-cat="sub"],
.page-faq #faq-cat-device:checked ~ .faq-board__inner .faq-group[data-cat="device"],
.page-faq #faq-cat-help:checked ~ .faq-board__inner .faq-group[data-cat="help"] {
  display: block;
}

.page-faq .faq-group__title {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .16em;
  color: var(--orange);
}

.page-faq .faq-group__title::after {
  content: "";
  flex: 1 1 auto;
  height: 1px;
  background: linear-gradient(to right, var(--line-strong), transparent);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-item {
  border-bottom: 1px solid var(--line);
  background: transparent;
}

.page-faq .faq-item:first-of-type {
  border-top: 1px solid var(--line);
}

.page-faq .faq-item summary {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 2px;
  cursor: pointer;
  list-style: none;
  transition: color .2s var(--ease);
}

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

.page-faq .faq-item summary::marker {
  content: "";
}

.page-faq .faq-item summary:hover .faq-q {
  color: var(--lime);
}

.page-faq .faq-q {
  flex: 1 1 auto;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--ivory);
  transition: color .2s var(--ease);
}

.page-faq .faq-mark {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--orange);
  transition: transform .22s var(--ease), color .22s var(--ease);
}

.page-faq .faq-item[open] .faq-mark {
  color: var(--lime);
  transform: rotate(45deg);
}

.page-faq .faq-item__body {
  padding: 0 2px 20px;
  border-left: 3px solid var(--orange);
  padding-left: 16px;
  margin-bottom: 18px;
}

.page-faq .faq-item__conclusion {
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.74;
  color: var(--ivory);
}

.page-faq .faq-steps {
  counter-reset: faqstep;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-steps li {
  counter-increment: faqstep;
  position: relative;
  padding-left: 34px;
  margin-bottom: 9px;
  font-size: 15.5px;
  line-height: 1.72;
  color: rgba(255, 247, 232, .78);
}

.page-faq .faq-steps li:last-child {
  margin-bottom: 0;
}

.page-faq .faq-steps li::before {
  content: counter(faqstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 3px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .02em;
  color: var(--blue);
}

.page-faq .faq-device-figure {
  margin: 18px 0 0;
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
  background: var(--deep);
}

.page-faq .faq-device-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.page-faq .faq-device-figure .media__caption {
  padding: 10px 12px 12px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--grey);
}

/* ---------- 右侧刻度 ---------- */
.page-faq .faq-scale {
  display: none;
}

/* ---------- 人工支持面板 ---------- */
.page-faq .faq-support {
  margin-top: 50px;
  padding: 48px 0 54px;
  background: var(--cream);
  color: var(--brown);
}

.page-faq .faq-cut {
  clip-path: polygon(0 30px, 30px 0, 100% 0, 100% 100%, 0 100%);
}

.page-faq .faq-support__kicker {
  color: var(--blue-ink);
  letter-spacing: .18em;
}

.page-faq .faq-support__title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(24px, 4.4vw, 38px);
  font-weight: 600;
  line-height: 1.16;
  color: var(--brown);
}

.page-faq .faq-support__lede {
  margin: 16px 0 0;
  max-width: 46em;
  font-size: 16.5px;
  line-height: 1.78;
  color: rgba(26, 19, 16, .82);
}

.page-faq .faq-support a {
  color: var(--blue-ink);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
  transition: color .2s var(--ease);
}

.page-faq .faq-support a:hover {
  color: var(--orange);
}

.page-faq .faq-contact {
  margin: 26px 0 0;
  display: grid;
  gap: 14px;
}

.page-faq .faq-contact__item {
  display: grid;
  gap: 4px;
  padding: 14px 16px;
  background: rgba(255, 255, 255, .58);
  border-left: 3px solid var(--orange);
}

.page-faq .faq-contact__item dt {
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: .16em;
  color: rgba(26, 19, 16, .58);
}

.page-faq .faq-contact__item dd {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.page-faq .faq-contact__val {
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.5;
  word-break: break-word;
  color: var(--brown);
}

.page-faq .faq-contact .copy-btn {
  padding: 6px 12px;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  color: var(--brown);
  background: transparent;
  border: 1px solid rgba(26, 19, 16, .32);
  cursor: pointer;
  clip-path: polygon(7px 0, 100% 0, 100% calc(100% - 7px), calc(100% - 7px) 100%, 0 100%, 0 7px);
  transition: color .2s var(--ease), border-color .2s var(--ease), background .2s var(--ease);
}

.page-faq .faq-contact .copy-btn:hover {
  color: var(--ivory);
  background: var(--orange);
  border-color: var(--orange);
}

.page-faq .faq-contact .copy-btn__hint {
  margin-left: 8px;
  font-size: 12px;
  color: var(--blue-ink);
  opacity: 0;
  transition: opacity .2s var(--ease);
}

.page-faq .faq-contact .copy-btn.is-ok .copy-btn__hint {
  opacity: 1;
}

.page-faq .faq-support__note {
  margin: 24px 0 0;
  font-size: 15px;
  line-height: 1.7;
  color: rgba(26, 19, 16, .72);
}

/* ---------- 桌面布局 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-hero {
    flex-direction: row;
    align-items: flex-end;
    gap: 34px;
    padding-bottom: 34px;
  }

  .page-faq .faq-hero__copy {
    flex: 1 1 56%;
    min-width: 0;
  }

  .page-faq .faq-hero__media {
    flex: 1 1 44%;
    margin: 0 0 4px;
  }

  .page-faq .faq-board__inner {
    grid-template-columns: var(--faq-cat-w) minmax(0, 1fr) var(--faq-scale-w);
    gap: 34px;
    align-items: start;
  }

  .page-faq .faq-cats {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
    position: sticky;
    top: 28px;
  }

  .page-faq .faq-cat {
    width: 100%;
    text-align: left;
    padding: 11px 14px;
  }

  .page-faq .faq-scale {
    display: block;
    position: relative;
    align-self: stretch;
    min-height: 320px;
    border-left: 1px dashed var(--line-strong);
    margin-left: 10px;
  }

  .page-faq .faq-scale span {
    position: absolute;
    left: -4px;
    width: 8px;
    height: 1px;
    background: var(--grey);
    opacity: .7;
  }

  .page-faq .faq-scale span:nth-child(1) { top: 6%; }
  .page-faq .faq-scale span:nth-child(2) { top: 22%; }
  .page-faq .faq-scale span:nth-child(3) { top: 38%; }
  .page-faq .faq-scale span:nth-child(4) { top: 55%; }
  .page-faq .faq-scale span:nth-child(5) { top: 73%; }
  .page-faq .faq-scale span:nth-child(6) { top: 90%; }

  .page-faq .faq-q {
    font-size: 18px;
  }

  .page-faq .faq-contact {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-item__body {
    padding-right: 40px;
  }
}