.page-faq {
  --faq-rail-w: 236px;
  --faq-item-pad: 14px;
  --faq-no-w: 24px;
  --faq-no-gap: 12px;
  background: var(--qs-night);
  color: var(--qs-text);
  font-family: var(--qs-body);
  padding-bottom: clamp(56px, 9vw, 110px);
}

/* 首屏 */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 5vw, 44px) 0 clamp(30px, 5vw, 56px);
  background:
    radial-gradient(110% 120% at 92% -20%, rgba(39, 194, 176, 0.18), transparent 58%),
    linear-gradient(180deg, var(--qs-night) 0%, var(--qs-stand) 100%);
  border-bottom: 1px solid var(--qs-line);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -6%;
  bottom: -48%;
  width: min(560px, 78vw);
  height: 300px;
  background: repeating-linear-gradient(112deg, rgba(200, 244, 65, 0.16) 0 2px, transparent 2px 16px);
  transform: skewY(-8deg);
  opacity: 0.6;
  pointer-events: none;
}

.page-faq .faq-hero .qs-container {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__eyebrow {
  margin: 22px 0 0;
  color: var(--qs-lake);
}

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  font-family: var(--qs-display);
  font-weight: 800;
  font-size: clamp(34px, 8vw, 68px);
  line-height: 0.98;
  letter-spacing: -0.01em;
  color: var(--qs-white);
  text-wrap: balance;
}

.page-faq .faq-hero__title::after {
  content: "";
  display: block;
  width: 64px;
  height: 4px;
  margin-top: 18px;
  background: var(--qs-lime);
}

.page-faq .faq-hero__lede {
  margin: 20px 0 0;
  max-width: 48ch;
  font-size: 17px;
  line-height: 1.78;
  color: var(--qs-text);
}

/* 双栏骨架 */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 5vw, 40px);
  padding-top: clamp(28px, 5vw, 52px);
}

@media (min-width: 900px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    column-gap: clamp(36px, 5vw, 72px);
    row-gap: 0;
    align-items: start;
  }
}

/* 左侧分类刻度尺 */
.page-faq .faq-rail {
  position: relative;
  min-width: 0;
}

@media (min-width: 900px) {
  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--qs-header-h) + 28px);
  }
}

.page-faq .faq-rail__title {
  margin: 0;
  color: var(--qs-mist);
}

.page-faq .faq-rail__list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-faq .faq-rail__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  padding: 9px 13px;
  border: 1px solid var(--qs-line);
  color: var(--qs-mist);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.2;
  background: rgba(14, 37, 64, 0.5);
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
  transition: color 0.2s var(--qs-ease), border-color 0.2s var(--qs-ease);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  color: var(--qs-white);
  border-color: var(--qs-lake);
}

.page-faq .faq-rail__no {
  font-family: var(--qs-mono);
  font-size: 12px;
  color: var(--qs-lake);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-rail__note {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--qs-mist);
}

.page-faq .faq-rail__note a {
  color: var(--qs-lake);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-rail__note a:hover {
  color: var(--qs-lime);
}

@media (min-width: 900px) {
  .page-faq .faq-rail__list {
    display: grid;
    gap: 0;
    overflow: visible;
    padding: 0;
    border-left: 1px solid var(--qs-line);
  }

  .page-faq .faq-rail__link {
    display: grid;
    grid-template-columns: 30px minmax(0, 1fr);
    align-items: center;
    gap: 10px;
    white-space: normal;
    padding: 12px 8px 12px 14px;
    margin-left: -1px;
    border: 0;
    border-left: 2px solid transparent;
    background: none;
    clip-path: none;
    font-size: 15px;
    transition: color 0.2s var(--qs-ease), border-color 0.2s var(--qs-ease), background 0.2s var(--qs-ease);
  }

  .page-faq .faq-rail__link:hover,
  .page-faq .faq-rail__link:focus-visible {
    color: var(--qs-white);
    border-left-color: var(--qs-lime);
    background: rgba(200, 244, 65, 0.07);
  }
}

/* 问题分组 */
.page-faq .faq-body {
  min-width: 0;
}

.page-faq .faq-group {
  border-top: 1px solid var(--qs-line);
  padding-top: clamp(22px, 4vw, 34px);
  scroll-margin-top: calc(var(--qs-header-h) + 24px);
}

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

.page-faq .faq-group + .faq-group {
  margin-top: clamp(38px, 6vw, 68px);
}

.page-faq .faq-group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0 14px;
}

.page-faq .faq-group__no {
  font-family: var(--qs-mono);
  font-size: 13px;
  font-weight: 700;
  line-height: 1.2;
  padding: 4px 8px;
  color: var(--qs-night);
  background: var(--qs-lime);
  transition: background 0.24s var(--qs-ease);
}

.page-faq .faq-group:target .faq-group__no {
  background: var(--qs-orange);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--qs-display);
  font-weight: 800;
  font-size: clamp(24px, 4.4vw, 34px);
  line-height: 1.06;
  letter-spacing: -0.005em;
  color: var(--qs-white);
}

.page-faq .faq-group__desc {
  flex: 0 0 100%;
  margin: 12px 0 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--qs-mist);
}

/* 配图 */
.page-faq .faq-figure {
  margin: 22px 0 0;
  position: relative;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background: var(--qs-stand);
  clip-path: polygon(
    0 0,
    calc(100% - var(--qs-cut)) 0,
    100% var(--qs-cut),
    100% 100%,
    var(--qs-cut) 100%,
    0 calc(100% - var(--qs-cut))
  );
}

.page-faq .faq-figure__cap {
  margin: 10px 0 0;
  font-family: var(--qs-mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.01em;
  color: var(--qs-mist);
}

@media (min-width: 720px) {
  .page-faq .faq-figure--narrow {
    max-width: 62%;
    margin-left: auto;
  }
}

/* 问答条目 */
.page-faq .faq-list {
  margin-top: 22px;
  border-top: 1px solid var(--qs-line);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--qs-line);
  border-left: 3px solid transparent;
  background: transparent;
  transition: background 0.24s var(--qs-ease), border-left-color 0.24s var(--qs-ease);
}

.page-faq .faq-item[open] {
  background: rgba(14, 37, 64, 0.55);
  border-left-color: var(--qs-orange);
}

.page-faq .faq-item summary {
  display: flex;
  align-items: flex-start;
  gap: var(--faq-no-gap);
  padding: 17px 14px 17px var(--faq-item-pad);
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  line-height: 1.55;
  color: var(--qs-text);
  transition: color 0.2s var(--qs-ease);
}

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

.page-faq .faq-item summary:hover,
.page-faq .faq-item summary:focus-visible {
  color: var(--qs-white);
}

.page-faq .faq-item[open] summary {
  color: var(--qs-white);
}

.page-faq .faq-item__no {
  flex: none;
  width: var(--faq-no-w);
  font-family: var(--qs-mono);
  font-size: 12px;
  line-height: 24px;
  color: var(--qs-lake);
  font-variant-numeric: tabular-nums;
  transition: color 0.24s var(--qs-ease);
}

.page-faq .faq-item[open] .faq-item__no {
  color: var(--qs-orange);
}

.page-faq .faq-item__text {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .faq-item__sign {
  flex: none;
  position: relative;
  width: 22px;
  height: 22px;
  margin-left: auto;
  margin-top: 1px;
  border: 1px solid var(--qs-line);
  transition: border-color 0.24s var(--qs-ease);
}

.page-faq .faq-item[open] .faq-item__sign {
  border-color: var(--qs-orange);
}

.page-faq .faq-item__sign::before,
.page-faq .faq-item__sign::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--qs-lake);
  transform: translate(-50%, -50%);
  transition: transform 0.24s var(--qs-ease), opacity 0.24s var(--qs-ease), background 0.24s var(--qs-ease);
}

.page-faq .faq-item__sign::before {
  width: 10px;
  height: 2px;
}

.page-faq .faq-item__sign::after {
  width: 2px;
  height: 10px;
}

.page-faq .faq-item[open] .faq-item__sign::before {
  background: var(--qs-orange);
}

.page-faq .faq-item[open] .faq-item__sign::after {
  transform: translate(-50%, -50%) rotate(90deg);
  opacity: 0;
  background: var(--qs-orange);
}

/* 答案区 */
.page-faq .faq-item__a {
  padding: 0 14px 20px calc(var(--faq-item-pad) + 3px + var(--faq-no-w) + var(--faq-no-gap));
}

.page-faq .faq-item__a p {
  margin: 0 0 10px;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--qs-mist);
}

.page-faq .faq-item__a p:last-child {
  margin-bottom: 0;
}

.page-faq .faq-item__a ol {
  margin: 4px 0 12px;
  padding-left: 20px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--qs-text);
}

.page-faq .faq-item__a ol li {
  margin-bottom: 6px;
  padding-left: 2px;
}

.page-faq .faq-item__a ol li::marker {
  font-family: var(--qs-mono);
  color: var(--qs-orange);
}

/* 组尾下一步 */
.page-faq .faq-next {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 22px;
  padding-bottom: 3px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--qs-lake);
  text-decoration: none;
  border-bottom: 1px solid rgba(39, 194, 176, 0.42);
  transition: color 0.2s var(--qs-ease), border-color 0.2s var(--qs-ease);
}

.page-faq .faq-next::after {
  content: "→";
  font-family: var(--qs-mono);
}

.page-faq .faq-next:hover,
.page-faq .faq-next:focus-visible {
  color: var(--qs-lime);
  border-bottom-color: var(--qs-lime);
}

/* 窄屏细节修正 */
@media (max-width: 599px) {
  .page-faq .faq-item__a {
    padding-left: calc(var(--faq-item-pad) + 3px);
  }

  .page-faq .faq-item summary {
    font-size: 15px;
  }
}