.page-faq {
  --faq-radius: 4px;
  --faq-index-w: 236px;
  --faq-top: calc(var(--header-h, 72px) + 28px);
  background: var(--black);
  color: var(--bone);
  padding-bottom: 72px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  background: var(--black);
  border-bottom: 1px solid var(--line);
  padding: calc(var(--header-h, 76px) + 44px) 0 44px;
}
.page-faq .faq-hero > .shell {
  position: relative;
  z-index: 1;
}
.page-faq .faq-hero__ghost {
  position: absolute;
  right: -1vw;
  top: 12%;
  z-index: 0;
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(140px, 30vw, 340px);
  line-height: 0.78;
  letter-spacing: -0.05em;
  color: rgba(251, 9, 11, 0.12);
  pointer-events: none;
  user-select: none;
}
.page-faq .faq-hero__kicker {
  margin: 20px 0 0;
  color: var(--fluoro);
}
.page-faq .faq-hero__title {
  margin: 16px 0 0;
  max-width: 15ch;
  font-size: clamp(32px, 7.6vw, 74px);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.022em;
}
.page-faq .faq-hero__lede {
  margin: 20px 0 0;
  max-width: 36ch;
  color: var(--mist);
  font-size: 16px;
  line-height: 1.75;
}
.page-faq .faq-hero__jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}
.page-faq .faq-hero__jumplink {
  display: inline-flex;
  align-items: center;
  padding: 9px 14px;
  border: 1px solid var(--line);
  border-radius: var(--faq-radius);
  background: var(--glass);
  color: var(--bone);
  font-size: 13px;
  line-height: 1.2;
  text-decoration: none;
  transition: background-color 140ms var(--ease), color 140ms var(--ease), border-color 140ms var(--ease);
}
.page-faq .faq-hero__jumplink:hover {
  background: var(--bone);
  border-color: var(--bone);
  color: var(--black);
}

/* ---------- 主体布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
  padding-top: 28px;
}

/* ---------- 左侧索引 ---------- */
.page-faq .faq-index__title {
  margin: 0 0 10px;
  color: var(--mist);
}
.page-faq .faq-index__list {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding: 2px 0 8px;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}
.page-faq .faq-index__list::-webkit-scrollbar {
  display: none;
}
.page-faq .faq-index__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
  padding: 9px 12px;
  border: 1px solid var(--line);
  border-left: 3px solid transparent;
  border-radius: var(--faq-radius);
  color: var(--mist);
  font-size: 13.5px;
  line-height: 1.3;
  white-space: nowrap;
  text-decoration: none;
  transition: color 140ms var(--ease), border-color 140ms var(--ease), background-color 140ms var(--ease);
}
.page-faq .faq-index__link:hover {
  color: var(--bone);
  border-color: var(--line);
  background: var(--carbon);
}
.page-faq .faq-index__link[aria-current="true"] {
  color: var(--bone);
  background: var(--carbon);
  border-left-color: var(--red);
}
.page-faq .faq-index__no {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--fluoro);
}

/* ---------- 分组 ---------- */
.page-faq .faq-body {
  min-width: 0;
}
.page-faq .faq-group {
  padding: 34px 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: var(--faq-top);
}
.page-faq .faq-group:first-child {
  border-top: 0;
  padding-top: 0;
}
.page-faq .faq-group__head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 22px;
}
.page-faq .faq-group__no {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: var(--faq-radius);
  background: var(--red);
  color: var(--bone);
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
}
.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(22px, 3.6vw, 30px);
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: -0.012em;
}
.page-faq .faq-group__lede {
  margin: 8px 0 0;
  max-width: 44ch;
  color: var(--mist);
  font-size: 14.5px;
  line-height: 1.7;
}

/* ---------- 三步走卡片 ---------- */
.page-faq .step-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-faq .step {
  background: var(--carbon);
  border: 1px solid var(--line);
  border-radius: var(--faq-radius);
  padding: var(--pad-card);
}
.page-faq .step__no {
  display: block;
  width: max-content;
  min-width: 42px;
  padding-bottom: 7px;
  border-bottom: 2px solid var(--fluoro);
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--bone);
}
.page-faq .step__title {
  margin: 14px 0 0;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
}
.page-faq .step__text {
  margin: 8px 0 0;
  color: var(--mist);
  font-size: 14.5px;
  line-height: 1.7;
}

/* ---------- 图片 ---------- */
.page-faq .faq-figure {
  margin: 20px 0 0;
}
.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--faq-radius);
  object-fit: cover;
}

/* ---------- 折叠问答卡 ---------- */
.page-faq .faq-cards {
  display: grid;
  gap: 10px;
}
.page-faq .faq-card {
  background: var(--carbon);
  border: 1px solid var(--line);
  border-radius: var(--faq-radius);
  overflow: hidden;
}
.page-faq .faq-card__q {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 18px;
  border-left: 3px solid transparent;
  list-style: none;
  cursor: pointer;
  color: var(--bone);
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.5;
  transition: background-color 140ms var(--ease), border-color 140ms var(--ease), color 140ms var(--ease);
}
.page-faq .faq-card__q::-webkit-details-marker {
  display: none;
}
.page-faq .faq-card__q:hover {
  background: var(--graphite);
}
.page-faq .faq-card[open] .faq-card__q {
  border-left-color: var(--red);
  color: var(--fluoro);
}
.page-faq .faq-card__qtext {
  flex: 1 1 auto;
  min-width: 0;
}
.page-faq .faq-card__chev {
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  margin-top: -4px;
  border-right: 2px solid var(--mist);
  border-bottom: 2px solid var(--mist);
  transform: rotate(45deg);
  transition: transform 180ms var(--ease), border-color 180ms var(--ease);
}
.page-faq .faq-card[open] .faq-card__chev {
  margin-top: 2px;
  border-color: var(--fluoro);
  transform: rotate(-135deg);
}
.page-faq .faq-card__a {
  padding: 0 18px 18px 18px;
  border-left: 3px solid var(--red);
  color: var(--mist);
  font-size: 14.5px;
  line-height: 1.75;
}
.page-faq .faq-card__a p {
  margin: 0 0 10px;
}
.page-faq .faq-card__a p:last-child {
  margin-bottom: 0;
}
.page-faq .faq-card__a a {
  color: var(--fluoro);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 纠错清单 ---------- */
.page-faq .check-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-faq .check-list__item {
  display: flex;
  gap: 12px;
  padding: 16px 18px;
  background: var(--graphite);
  border: 1px solid var(--line);
  border-radius: var(--faq-radius);
}
.page-faq .check-list__box {
  position: relative;
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  margin-top: 3px;
  border-radius: 3px;
  background: var(--fluoro);
}
.page-faq .check-list__box::after {
  content: "";
  position: absolute;
  left: 6px;
  top: 3px;
  width: 4px;
  height: 9px;
  border-right: 2px solid var(--black);
  border-bottom: 2px solid var(--black);
  transform: rotate(40deg);
}
.page-faq .check-list__title {
  margin: 0;
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.45;
}
.page-faq .check-list__text {
  margin: 6px 0 0;
  color: var(--mist);
  font-size: 14px;
  line-height: 1.7;
}
.page-faq .faq-inline-cta {
  margin: 20px 0 0;
}

/* ---------- 联系面板 ---------- */
.page-faq .faq-group--contact {
  padding-bottom: 0;
}
.page-faq .contact-panel {
  padding: var(--pad-card);
  background: var(--carbon);
  border: 1px solid var(--line);
  border-left: 4px solid var(--red);
  border-radius: var(--faq-radius);
}
.page-faq .contact-panel__list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-faq .contact-panel__item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.page-faq .contact-panel__label {
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mist);
}
.page-faq .contact-panel__value {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--bone);
  word-break: break-word;
}
.page-faq .contact-panel__note {
  margin: 18px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  max-width: 42ch;
  color: var(--mist);
  font-size: 14px;
  line-height: 1.75;
}
.page-faq .contact-panel__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 20px 0 0;
}

/* ---------- 平板宽度 ---------- */
@media (min-width: 700px) {
  .page-faq .step-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-faq .check-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-faq .contact-panel__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-faq .faq-hero {
    padding-bottom: 56px;
  }
}

/* ---------- 桌面端 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    gap: 60px;
    padding-top: 44px;
  }
  .page-faq .faq-index__inner {
    position: sticky;
    top: var(--faq-top);
  }
  .page-faq .faq-index__list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    overflow: visible;
    padding: 0;
  }
  .page-faq .faq-index__link {
    flex: 1 1 auto;
    padding: 11px 12px;
    border: 0;
    border-left: 3px solid transparent;
    border-radius: 0 var(--faq-radius) var(--faq-radius) 0;
    white-space: normal;
  }
  .page-faq .faq-index__link:hover {
    border-left-color: var(--line);
  }
  .page-faq .faq-index__link[aria-current="true"] {
    border-left-color: var(--red);
    background: var(--carbon);
  }
  .page-faq .faq-card__a {
    padding: 0 22px 20px 22px;
  }
  .page-faq .faq-card__q {
    padding: 17px 22px;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-hero__lede {
    font-size: 17px;
  }
  .page-faq .faq-group {
    padding: 44px 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-hero__jumplink,
  .page-faq .faq-index__link,
  .page-faq .faq-card__q,
  .page-faq .faq-card__chev {
    transition: none;
  }
}