.page-faq {
  --faq-rail: 224px;
  --faq-gap: 56px;
  --faq-line: rgba(90, 100, 114, .2);
  --faq-line-strong: rgba(90, 100, 114, .42);
  --faq-dash: rgba(200, 16, 46, .38);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  background: var(--ink);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(201, 206, 214, .07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(201, 206, 214, .07) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: radial-gradient(130% 110% at 82% -10%, #000 0%, transparent 68%);
  mask-image: radial-gradient(130% 110% at 82% -10%, #000 0%, transparent 68%);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--red) 0%, var(--red-deep) 46%, var(--green) 100%);
}

.page-faq .faq-hero .shell {
  position: relative;
  z-index: 2;
}

.page-faq .faq-hero__deco {
  position: absolute;
  right: -.06em;
  bottom: -.34em;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(180px, 34vw, 400px);
  line-height: 1;
  color: rgba(200, 16, 46, .14);
  pointer-events: none;
  user-select: none;
  z-index: 1;
}

.page-faq .faq-hero .crumbs {
  color: rgba(201, 206, 214, .7);
  margin-bottom: 26px;
}

.page-faq .faq-hero .crumbs a {
  color: rgba(247, 248, 250, .92);
  text-decoration: none;
}

.page-faq .faq-hero .crumbs a:hover {
  color: var(--white);
  text-decoration: underline;
}

.page-faq .faq-hero__grid {
  max-width: 52rem;
}

.page-faq .faq-hero__kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .16em;
  color: var(--mint);
}

.page-faq .faq-hero__kicker::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
}

.page-faq .faq-hero .pagehead__title {
  color: var(--white);
  font-size: clamp(34px, 6.2vw, 74px);
  line-height: 1.08;
  letter-spacing: -.02em;
  margin: 0 0 20px;
  max-width: 22em;
}

.page-faq .faq-hero .pagehead__lede {
  color: rgba(201, 206, 214, .84);
  font-size: 16.5px;
  line-height: 1.85;
  max-width: 40em;
  margin: 0 0 28px;
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 0;
}

/* ---------- 主体 ---------- */
.page-faq .faq-body {
  position: relative;
}

.page-faq .faq-body__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
}

.page-faq .faq-index__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--muted);
}

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

.page-faq .faq-index__item {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 14px;
  border: 1px solid var(--faq-line-strong);
  border-radius: var(--radius);
  background: rgba(247, 248, 250, .7);
  color: var(--graphite);
  font-size: 14px;
  text-decoration: none;
  white-space: nowrap;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

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

.page-faq .faq-index__item:hover {
  color: var(--red);
  border-color: var(--red);
}

.page-faq .faq-index__item:focus-visible {
  outline: 2px solid var(--red);
  outline-offset: 2px;
}

.page-faq .faq-index__help {
  display: inline-block;
  margin-top: 14px;
  font-size: 13.5px;
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px dashed var(--faq-line-strong);
}

.page-faq .faq-index__help:hover {
  color: var(--red);
  border-bottom-color: var(--faq-dash);
}

.page-faq:has(#g-1:target) .faq-index__item[data-idx="1"],
.page-faq:has(#g-2:target) .faq-index__item[data-idx="2"],
.page-faq:has(#g-3:target) .faq-index__item[data-idx="3"],
.page-faq:has(#g-4:target) .faq-index__item[data-idx="4"],
.page-faq:has(#g-5:target) .faq-index__item[data-idx="5"] {
  color: var(--red);
  border-color: var(--red);
  background: rgba(200, 16, 46, .07);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: calc(var(--bar-h) + 28px);
}

.page-faq .faq-group + .faq-group {
  position: relative;
  margin-top: 56px;
  padding-top: 56px;
}

.page-faq .faq-group + .faq-group::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--red) 0 44px, var(--faq-line) 44px 100%);
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 16px;
  align-items: baseline;
  margin-bottom: 22px;
}

.page-faq .faq-group__no {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--red);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-group__no::before {
  content: "";
  display: block;
  width: 20px;
  height: 3px;
  background: var(--red);
  margin-bottom: 10px;
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(22px, 3.1vw, 34px);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -.01em;
  color: var(--graphite);
}

.page-faq .faq-group__note {
  grid-column: 2;
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-group__body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

.page-faq .faq-group__col {
  min-width: 0;
}

/* ---------- 单条问答 ---------- */
.page-faq .qa {
  padding: 24px 0;
  border-top: 1px solid var(--faq-line);
}

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

.page-faq .qa:last-child {
  padding-bottom: 0;
}

.page-faq .qa--lead {
  border-left: 3px solid var(--red);
  padding-left: 16px;
}

.page-faq .qa__q {
  margin: 0 0 10px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.55;
  color: var(--graphite);
}

.page-faq .qa--lead .qa__q {
  font-size: clamp(21px, 2.7vw, 29px);
  font-weight: 800;
  line-height: 1.32;
  letter-spacing: -.01em;
  color: var(--ink);
}

.page-faq .qa__a {
  margin: 0;
  max-width: 44em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .qa__a a {
  color: var(--red);
  text-decoration: none;
  border-bottom: 1px solid var(--faq-dash);
}

.page-faq .qa__a a:hover {
  color: var(--red-deep);
  border-bottom-color: var(--red-deep);
}

/* ---------- 三步登记 ---------- */
.page-faq .faq-steps {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
}

.page-faq .faq-steps__item {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 14px;
  padding: 12px 0;
  border-top: 1px dashed var(--faq-line-strong);
  font-size: 15px;
  line-height: 1.75;
  color: var(--graphite);
}

.page-faq .faq-steps__item:last-child {
  border-bottom: 1px dashed var(--faq-line-strong);
}

.page-faq .faq-steps__no {
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--red);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-steps a {
  color: var(--red);
  text-decoration: none;
  border-bottom: 1px solid var(--faq-dash);
}

.page-faq .faq-steps a:hover {
  color: var(--red-deep);
  border-bottom-color: var(--red-deep);
}

/* ---------- 折叠补充 ---------- */
.page-faq .fold {
  margin-top: 14px;
}

.page-faq .fold__btn {
  display: none;
  align-items: center;
  gap: 6px;
  padding: 0 0 2px;
  border: 0;
  border-bottom: 1px dashed var(--faq-dash);
  background: none;
  font: inherit;
  font-size: 14px;
  color: var(--red);
  cursor: pointer;
}

.js .page-faq .fold__btn {
  display: inline-flex;
}

.page-faq .fold__btn::after {
  content: "＋";
  font-size: 12px;
}

.page-faq .fold__btn[aria-expanded="true"]::after {
  content: "－";
}

.page-faq .fold__btn:focus-visible {
  outline: 2px solid var(--red);
  outline-offset: 3px;
}

.page-faq .fold__panel {
  display: block;
}

.js .page-faq .fold__panel {
  display: none;
}

.js .page-faq .fold__panel[data-open] {
  display: block;
}

.page-faq .fold__inner {
  padding-top: 12px;
  max-width: 42em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

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

/* ---------- 配图 ---------- */
.page-faq .faq-fig {
  margin: 0;
}

.page-faq .faq-fig--tall .figure__media {
  aspect-ratio: 1000 / 760;
}

.page-faq .faq-fig--wide .figure__media {
  aspect-ratio: 1000 / 620;
}

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

/* ---------- 收尾求助 ---------- */
.page-faq .faq-help {
  position: relative;
  background: var(--ink);
}

.page-faq .faq-help__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
  align-items: start;
}

.page-faq .faq-help__kicker {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .16em;
  color: var(--mint);
}

.page-faq .faq-help__title {
  margin: 0 0 16px;
  font-size: clamp(24px, 3.4vw, 38px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -.01em;
  color: var(--white);
}

.page-faq .faq-help__text {
  margin: 0 0 14px;
  max-width: 40em;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(201, 206, 214, .84);
}

.page-faq .faq-help__actions {
  margin: 24px 0 0;
}

.page-faq .faq-help__card {
  padding: 8px 24px 20px;
}

.page-faq .faq-help__row {
  padding: 16px 0;
  border-top: 1px solid rgba(201, 206, 214, .18);
}

.page-faq .faq-help__row:first-child {
  border-top: 0;
  padding-top: 18px;
}

.page-faq .faq-help__label {
  margin: 0 0 6px;
  font-size: 12.5px;
  letter-spacing: .1em;
  color: var(--silver);
}

.page-faq .faq-help__val {
  margin: 0;
  font-size: 16.5px;
  line-height: 1.6;
  color: var(--white);
  word-break: break-all;
}

.page-faq .faq-help__val--mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: .02em;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-group__body {
    gap: 32px;
  }

  .page-faq .faq-group--split .faq-group__body {
    grid-template-columns: minmax(0, 1fr) minmax(0, 300px);
  }
}

@media (min-width: 960px) {
  .page-faq .faq-body__grid {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: var(--faq-gap);
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--bar-h) + 28px);
    align-self: start;
  }

  .page-faq .faq-index__list {
    display: block;
    overflow: visible;
    padding-bottom: 0;
    border-left: 1px solid var(--faq-line);
  }

  .page-faq .faq-index__list > li + li {
    margin-top: 2px;
  }

  .page-faq .faq-index__item {
    position: relative;
    width: 100%;
    padding: 10px 8px 10px 18px;
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0;
    background: none;
    color: var(--muted);
    white-space: normal;
    margin-left: -1px;
  }

  .page-faq .faq-index__item::before {
    content: "";
    position: absolute;
    left: -6px;
    top: 50%;
    width: 9px;
    height: 1px;
    background: var(--silver);
    transform: translateY(-50%);
  }

  .page-faq .faq-index__item:hover::before {
    background: var(--red);
  }

  .page-faq:has(#g-1:target) .faq-index__item[data-idx="1"],
  .page-faq:has(#g-2:target) .faq-index__item[data-idx="2"],
  .page-faq:has(#g-3:target) .faq-index__item[data-idx="3"],
  .page-faq:has(#g-4:target) .faq-index__item[data-idx="4"],
  .page-faq:has(#g-5:target) .faq-index__item[data-idx="5"] {
    background: none;
    border-left-color: var(--red);
    color: var(--red);
  }

  .page-faq .faq-help__grid {
    grid-template-columns: minmax(0, 1fr) 360px;
    gap: 56px;
  }
}

@media (min-width: 1080px) {
  .page-faq .faq-group--split .faq-group__body {
    grid-template-columns: minmax(0, 1fr) minmax(0, 340px);
    gap: 48px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__item {
    transition: none;
  }
}