.page-faq {
  --faq-gap: clamp(28px, 5vw, 56px);
}

.page-faq .bx-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  padding: 18px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

.page-faq .bx-breadcrumb__item + .bx-breadcrumb__item::before {
  content: "/";
  margin-right: 8px;
  color: var(--ink-700);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding: clamp(26px, 5vw, 54px) 0 clamp(34px, 6vw, 64px);
  position: relative;
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: 34px;
}

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-title);
  font-weight: 800;
  font-size: clamp(30px, 7vw, 56px);
  line-height: 1.16;
  letter-spacing: 0.03em;
  color: var(--paper);
}

.page-faq .faq-hero__lede {
  margin-top: 18px;
  max-width: 36em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--paper);
  opacity: 0.9;
}

.page-faq .faq-search {
  margin-top: 28px;
  max-width: 620px;
}

.page-faq .faq-search__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-search__input {
  box-sizing: border-box;
  display: block;
  width: 100%;
  margin-top: 10px;
  padding: 14px 16px;
  background: var(--ink-800);
  color: var(--paper);
  border: 2px solid var(--ink-700);
  border-radius: 0;
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: 0.06em;
  box-shadow: var(--shadow-hard);
  -webkit-appearance: none;
  appearance: none;
  transition: border-color 0.24s var(--ease), box-shadow 0.24s var(--ease);
}

.page-faq .faq-search__input::placeholder {
  color: var(--mist);
  letter-spacing: 0.04em;
}

.page-faq .faq-search__input:focus {
  outline: none;
  border-color: var(--cyan);
  box-shadow: var(--shadow-hard-lift);
}

.page-faq .faq-search__note {
  margin-top: 12px;
  max-width: 42em;
}

.page-faq .faq-hero__aside {
  display: grid;
  gap: 14px;
}

.page-faq .faq-side {
  box-sizing: border-box;
  padding: 18px;
  background: var(--ink-800);
  border: 2px solid var(--ink-700);
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-side .bx-tag {
  display: inline-block;
  margin: 0 0 4px;
}

.page-faq .faq-side__row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 0;
  border-top: 1px solid var(--hairline);
  font-size: 13px;
  line-height: 1.6;
}

.page-faq .faq-side__key {
  color: var(--mist);
}

.page-faq .faq-side__val {
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
  color: var(--paper);
  white-space: nowrap;
}

/* ---------- 分类块 ---------- */
.page-faq .faq-cats-title {
  margin: 0 0 18px;
}

.page-faq .faq-cats {
  display: grid;
  gap: 14px;
}

.page-faq .faq-cat {
  box-sizing: border-box;
  display: block;
  padding: 18px 18px 22px;
  background: var(--ink-800);
  border: 2px solid var(--ink-700);
  box-shadow: var(--shadow-hard);
  color: var(--paper);
  text-decoration: none;
  transition: transform 0.24s var(--ease), box-shadow 0.24s var(--ease),
    border-color 0.24s var(--ease), background 0.24s var(--ease);
}

.page-faq .faq-cat:hover,
.page-faq .faq-cat:focus-visible {
  transform: translate(-3px, -3px);
  border-color: var(--cyan-deep);
  box-shadow: var(--shadow-hard-lift);
}

.page-faq .faq-cat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

.page-faq .faq-cat__title {
  display: block;
  margin-top: 8px;
  font-family: var(--font-title);
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.page-faq .faq-cat__desc {
  display: block;
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 区块通用头 ---------- */
.page-faq .faq-block__head {
  max-width: 100%;
}

.page-faq .faq-block__title {
  margin: 12px 0 0;
  font-family: var(--font-title);
  font-size: clamp(23px, 4.2vw, 34px);
  font-weight: 800;
  line-height: 1.32;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-faq .faq-block__lede {
  margin-top: 14px;
  max-width: 42em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--mist);
}

.page-faq .faq-block__lede a,
.page-faq .faq-inline-link a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--hairline);
}

.page-faq .faq-block__lede a:hover,
.page-faq .faq-inline-link a:hover {
  border-bottom-color: var(--cyan);
}

/* ---------- 时间轴 ---------- */
.page-faq .faq-timeline-wrap {
  display: grid;
  gap: 34px;
  margin-top: 30px;
}

.page-faq .faq-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 28px;
  position: relative;
}

.page-faq .faq-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan) 0%, var(--cyan-deep) 45%, var(--ink-700) 100%);
}

.page-faq .faq-timeline__item {
  position: relative;
  padding: 0 0 24px 10px;
}

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

.page-faq .faq-timeline__item::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 5px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--ink-900);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 0 4px rgba(31, 224, 192, 0.1);
}

.page-faq .faq-timeline__time {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-faq .faq-timeline__device {
  margin: 6px 0 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--paper);
}

.page-faq .faq-timeline__meta {
  margin: 5px 0 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .faq-timeline__side {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-faq .faq-inline-link {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 三步 ---------- */
.page-faq .faq-step-media {
  margin-top: 28px;
}

.page-faq .faq-steps {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-faq .faq-step {
  box-sizing: border-box;
  padding: 22px 20px 24px;
  background: var(--ink-800);
  border: 2px solid var(--ink-700);
  border-left: 4px solid var(--cyan-deep);
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-step__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 34px;
  line-height: 1;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-faq .faq-step__title {
  margin: 12px 0 0;
  font-family: var(--font-title);
  font-size: 19px;
  font-weight: 800;
  letter-spacing: 0.03em;
  color: var(--paper);
}

.page-faq .faq-step__body {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--paper);
  opacity: 0.86;
}

.page-faq .faq-step__trap {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--ink-700);
  font-size: 13px;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .faq-step__trap b {
  color: var(--orange-soft);
  font-weight: 700;
}

/* ---------- 问答 ---------- */
.page-faq .faq-groups {
  display: grid;
  gap: 34px;
  margin-top: 32px;
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--ink-700);
}

.page-faq .faq-group__idx {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-title);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--paper);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--hairline);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 0;
  list-style: none;
  cursor: pointer;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.65;
  color: var(--paper);
  transition: color 0.2s var(--ease);
}

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

.page-faq .faq-item__q::after {
  content: "+";
  margin-left: auto;
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1.3;
  color: var(--cyan);
}

.page-faq .faq-item[open] .faq-item__q::after {
  content: "\2212";
}

.page-faq .faq-item__q:hover,
.page-faq .faq-item__q:focus-visible {
  color: var(--cyan);
}

.page-faq .faq-item__a {
  padding: 0 0 18px;
  max-width: 42em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
  animation: faq-open 0.24s var(--ease) both;
}

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

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

.page-faq .faq-item__a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--hairline);
}

@keyframes faq-open {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 行动带 ---------- */
.page-faq .faq-cta {
  box-sizing: border-box;
  display: grid;
  gap: 20px;
  padding: clamp(22px, 4vw, 38px);
  background: var(--ink-800);
  border: 2px solid var(--ink-700);
  border-top: 4px solid var(--orange);
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-cta__title {
  margin: 0;
  font-family: var(--font-title);
  font-size: clamp(20px, 3.4vw, 28px);
  font-weight: 800;
  line-height: 1.35;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-faq .faq-cta__desc {
  margin: 12px 0 0;
  max-width: 44em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

.page-faq .faq-cta__btn {
  justify-self: start;
}

.page-faq .bx-media__img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-faq .faq-cats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-faq .faq-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }

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

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1fr) 300px;
    align-items: start;
    gap: 52px;
  }

  .page-faq .faq-timeline-wrap {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 48px;
    align-items: start;
  }

  .page-faq .faq-cats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 980px) {
  .page-faq .faq-groups {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 40px 44px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-cat,
  .page-faq .faq-search__input,
  .page-faq .faq-item__q {
    transition: none;
  }

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

  .page-faq .faq-item__a {
    animation: none;
  }
}
```