.page-faq {
  --faq-sticky-top: 104px;
  --faq-block-gap: clamp(40px, 6vw, 76px);
  background: var(--bg);
  color: var(--silver);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 4vw, 44px) 0 clamp(40px, 6vw, 72px);
  border-bottom: 1px solid var(--line-soft);
  background:
    radial-gradient(120% 100% at 8% -10%, rgba(51, 230, 208, .10), transparent 58%),
    linear-gradient(180deg, #070B14 0%, #0A1120 100%);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: clamp(8px, 1.6vw, 20px);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  pointer-events: none;
  z-index: 1;
}

.page-faq .faq-hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-faq .faq-hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .30;
  filter: saturate(.65) contrast(1.05);
}

.page-faq .faq-hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(90% 80% at 20% 10%, rgba(51, 230, 208, .13), transparent 62%),
    linear-gradient(180deg, rgba(7, 11, 20, .45) 0%, rgba(7, 11, 20, .82) 62%, var(--bg) 100%);
}

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

.page-faq .faq-hero__title {
  margin: 16px 0 0;
  max-width: 22ch;
  font-family: var(--f-head);
  font-weight: 900;
  font-size: clamp(29px, 4.6vw, 54px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-faq .faq-hero__lede {
  margin: 18px 0 0;
  max-width: 62ch;
  font-size: clamp(15px, 1.15vw, 17px);
  line-height: 1.75;
  color: var(--silver);
}

.page-faq .faq-hero__stats {
  margin-top: clamp(26px, 3.4vw, 40px);
}

/* ---------- 主体骨架 ---------- */
.page-faq .faq-body {
  padding-top: clamp(36px, 5vw, 64px);
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 56px);
  align-items: start;
}

/* ---------- 左侧分类索引 ---------- */
.page-faq .faq-side__sticky {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(180deg, var(--raised) 0%, var(--panel) 100%);
  box-shadow: var(--shadow);
}

.page-faq .faq-side__title {
  margin: 0;
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--steel);
}

.page-faq .faq-cat {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 6px;
}

.page-faq .faq-cat__link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border: 1px solid transparent;
  border-radius: var(--r-sm);
  font-size: 14px;
  color: var(--silver);
  text-decoration: none;
  transition: background .22s var(--ease), border-color .22s var(--ease), color .22s var(--ease), transform .22s var(--ease);
}

.page-faq .faq-cat__link:hover,
.page-faq .faq-cat__link:focus-visible {
  background: var(--cyan-soft);
  border-color: rgba(51, 230, 208, .35);
  color: var(--white);
  transform: translateX(2px);
  outline: none;
}

.page-faq .faq-cat__num {
  font-size: 12px;
  color: var(--steel);
}

.page-faq .faq-cat__name {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.page-faq .faq-cat__count {
  font-size: 12px;
  color: var(--cyan);
}

.page-faq .faq-side__note {
  margin: 18px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line-soft);
  font-size: 13px;
  line-height: 1.7;
  color: var(--steel);
}

.page-faq .faq-side__note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(51, 230, 208, .35);
}

.page-faq .faq-side__note a:hover {
  border-bottom-color: var(--cyan);
}

/* ---------- 条目区 ---------- */
.page-faq .faq-main {
  display: grid;
  gap: var(--faq-block-gap);
  min-width: 0;
}

.page-faq .faq-block {
  scroll-margin-top: var(--faq-sticky-top);
  min-width: 0;
}

.page-faq .faq-block__title {
  margin: 10px 0 0;
  font-family: var(--f-head);
  font-weight: 800;
  font-size: clamp(21px, 2.5vw, 30px);
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-faq .faq-block__intro {
  margin: 14px 0 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--silver);
}

.page-faq .faq-list {
  margin-top: clamp(20px, 2.4vw, 28px);
  display: grid;
  gap: 10px;
}

.page-faq .faq-item {
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--panel);
  transition: border-color .24s var(--ease), box-shadow .24s var(--ease);
}

.page-faq .faq-item:hover {
  border-color: rgba(77, 127, 184, .55);
}

.page-faq .faq-item[open] {
  border-color: rgba(51, 230, 208, .40);
  background:
    linear-gradient(180deg, rgba(51, 230, 208, .055) 0%, transparent 42%),
    var(--panel);
  box-shadow: 0 14px 40px -30px rgba(51, 230, 208, .9);
}

.page-faq .faq-item__q {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: start;
  gap: 4px 16px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-item__q:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
  border-radius: var(--r-md);
}

.page-faq .faq-item__q-text {
  grid-column: 1;
  grid-row: 1;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--white);
}

.page-faq .faq-item__q-hint {
  grid-column: 1 / -1;
  grid-row: 2;
  font-family: var(--f-mono);
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--steel);
}

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

.page-faq .faq-item__arrow {
  grid-column: 2;
  grid-row: 1;
  position: relative;
  width: 22px;
  height: 22px;
  margin-top: 2px;
  border: 1px solid var(--line);
  border-radius: 50%;
  transition: transform .26s var(--ease), border-color .26s var(--ease), background .26s var(--ease);
}

.page-faq .faq-item__arrow::before,
.page-faq .faq-item__arrow::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--steel);
  transform: translate(-50%, -50%);
  transition: background .26s var(--ease), opacity .26s var(--ease);
}

.page-faq .faq-item__arrow::before {
  width: 10px;
  height: 1.5px;
}

.page-faq .faq-item__arrow::after {
  width: 1.5px;
  height: 10px;
}

.page-faq .faq-item[open] .faq-item__arrow {
  transform: rotate(90deg);
  border-color: var(--cyan);
  background: var(--cyan-soft);
}

.page-faq .faq-item[open] .faq-item__arrow::before {
  background: var(--cyan);
}

.page-faq .faq-item[open] .faq-item__arrow::after {
  opacity: 0;
}

.page-faq .faq-item__a {
  margin: 0 18px 18px;
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
  font-size: 15px;
  line-height: 1.78;
  color: var(--silver);
}

.page-faq .faq-item__a p {
  margin: 0 0 10px;
}

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

.page-faq .faq-item__a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(51, 230, 208, .35);
}

.page-faq .faq-item__a a:hover {
  border-bottom-color: var(--cyan);
}

.page-faq .faq-steps {
  margin: 0 0 10px;
  padding: 0;
  list-style: none;
  counter-reset: faq-step;
  display: grid;
  gap: 9px;
}

.page-faq .faq-steps li {
  position: relative;
  padding-left: 34px;
}

.page-faq .faq-steps li::before {
  counter-increment: faq-step;
  content: counter(faq-step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 3px;
  font-family: var(--f-mono);
  font-size: 12px;
  color: var(--cyan);
  letter-spacing: .04em;
}

/* ---------- 速查表与配图 ---------- */
.page-faq .faq-figure {
  margin: clamp(22px, 3vw, 32px) 0 0;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq .faq-table-wrap {
  margin-top: clamp(18px, 2.4vw, 26px);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  background: var(--panel);
}

.page-faq .faq-table {
  width: 100%;
  min-width: 540px;
  border-collapse: collapse;
}

.page-faq .faq-table__caption {
  padding: 14px 18px 0;
  text-align: left;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--steel);
}

.page-faq .faq-table thead th {
  padding: 14px 18px;
  text-align: left;
  background: var(--raised);
  border-bottom: 1px solid var(--line);
  font-family: var(--f-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--white);
}

.page-faq .faq-table tbody td {
  padding: 15px 18px;
  border-top: 1px solid var(--line-soft);
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--silver);
  vertical-align: top;
}

.page-faq .faq-table tbody tr:nth-child(odd) {
  background: rgba(20, 31, 53, .55);
}

.page-faq .faq-table tbody tr:nth-child(even) {
  background: transparent;
}

.page-faq .faq-table tbody td:first-child {
  width: 34%;
  font-family: var(--f-mono);
  font-size: 13.5px;
  color: var(--white);
}

.page-faq .faq-table tbody tr:hover {
  background: rgba(44, 74, 124, .28);
}

/* ---------- 收尾引导 ---------- */
.page-faq .faq-cta {
  margin-top: clamp(24px, 3vw, 36px);
  padding: clamp(24px, 3.4vw, 40px);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background:
    linear-gradient(140deg, rgba(51, 230, 208, .09) 0%, rgba(44, 74, 124, .22) 46%, transparent 82%),
    var(--panel);
}

.page-faq .faq-cta__title {
  margin: 0;
  font-family: var(--f-head);
  font-weight: 800;
  font-size: clamp(19px, 2.1vw, 24px);
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-faq .faq-cta__text {
  margin: 12px 0 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--silver);
}

.page-faq .faq-cta__actions {
  margin-top: 22px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 901px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(200px, 268px) minmax(0, 1fr);
  }

  .page-faq .faq-side {
    position: sticky;
    top: var(--faq-sticky-top);
  }
}

@media (max-width: 900px) {
  .page-faq .faq-side__sticky {
    position: static;
    padding: 16px;
  }

  .page-faq .faq-cat {
    grid-template-columns: repeat(auto-fit, minmax(148px, 1fr));
    gap: 8px;
  }

  .page-faq .faq-cat__link {
    padding: 9px 10px;
    font-size: 13.5px;
  }

  .page-faq .faq-side__note {
    margin-top: 14px;
    padding-top: 14px;
  }
}

@media (max-width: 640px) {
  .page-faq .faq-hero {
    padding-top: 22px;
  }

  .page-faq .faq-hero::before {
    inset: 8px;
  }

  .page-faq .faq-hero__title {
    max-width: 100%;
    font-size: clamp(26px, 7.4vw, 34px);
  }

  .page-faq .faq-item__q {
    padding: 14px 14px 12px;
    gap: 4px 12px;
  }

  .page-faq .faq-item__q-text {
    font-size: 15px;
  }

  .page-faq .faq-item__a {
    margin: 0 14px 16px;
    font-size: 14.5px;
  }

  .page-faq .faq-steps li {
    padding-left: 28px;
  }

  .page-faq .faq-table thead th,
  .page-faq .faq-table tbody td {
    padding: 12px 14px;
  }

  .page-faq .faq-cta__actions .btn {
    flex: 1 1 auto;
    justify-content: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-cat__link,
  .page-faq .faq-item,
  .page-faq .faq-item__arrow,
  .page-faq .faq-item__arrow::before,
  .page-faq .faq-item__arrow::after {
    transition: none;
  }

  .page-faq .faq-cat__link:hover,
  .page-faq .faq-cat__link:focus-visible {
    transform: none;
  }
}