.page-faq {
  --faq-line-paper: rgba(14, 20, 24, 0.14);
  --faq-ink-soft: rgba(14, 20, 24, 0.76);
  background: var(--ink);
  color: var(--smoke);
  font-family: var(--font-body);
  padding-bottom: clamp(48px, 7vw, 96px);
}

.page-faq .breadcrumb {
  padding-top: clamp(14px, 2.4vw, 26px);
}

.page-faq .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
}

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

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

.page-faq .breadcrumb__link {
  color: var(--smoke);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s var(--ease), color 0.25s var(--ease);
}

.page-faq .breadcrumb__link:hover,
.page-faq .breadcrumb__link:focus-visible {
  color: var(--teal);
  border-bottom-color: var(--teal);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-intro {
  display: grid;
  gap: clamp(24px, 4vw, 46px);
  padding-block: clamp(22px, 3.4vw, 40px) clamp(30px, 4.4vw, 56px);
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  color: var(--teal);
  padding-top: 10px;
  border-top: 1px solid var(--line-strong);
  display: inline-block;
}

.page-faq .faq-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.3rem, 8vw, 4.4rem);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-faq .faq-lead {
  margin: clamp(14px, 2vw, 20px) 0 0;
  max-width: 52ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--smoke);
}

.page-faq .faq-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  list-style: none;
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--smoke);
}

.page-faq .faq-facts li {
  display: flex;
  align-items: center;
  gap: 7px;
}

.page-faq .faq-facts li::before {
  content: "";
  width: 5px;
  height: 5px;
  flex: none;
  background: var(--coral);
  transform: rotate(45deg);
}

.page-faq .faq-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(20px, 3vw, 28px);
}

.page-faq .faq-figure {
  margin: 0;
  border: 1px solid var(--line-strong);
  background: var(--graphite);
  overflow: hidden;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 4 / 3;
}

/* ---------- 索引 + 内容主体 ---------- */
.page-faq .faq-shell {
  margin-top: clamp(26px, 4vw, 44px);
}

.page-faq .faq-index {
  border-top: 1px solid var(--line-strong);
  padding-top: 12px;
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-faq .faq-index__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.2em;
  color: var(--bronze);
}

.page-faq .faq-index__list {
  display: flex;
  gap: 6px;
  list-style: none;
  margin: 12px 0 0;
  padding: 0 0 4px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-faq .faq-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  white-space: nowrap;
  padding: 8px 12px;
  border: 1px solid var(--line);
  color: var(--smoke);
  font-size: 13px;
  text-decoration: none;
  transition: border-color 0.22s var(--ease), color 0.22s var(--ease), background-color 0.22s var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  border-color: var(--teal);
  color: var(--paper);
  background: rgba(43, 179, 163, 0.08);
  outline: none;
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  color: var(--teal);
}

/* ---------- 章节通用 ---------- */
.page-faq .faq-section {
  padding-block: clamp(26px, 3.8vw, 46px);
  border-top: 1px solid var(--line-soft);
  scroll-margin-top: calc(var(--header-pad) + 84px);
}

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

.page-faq .faq-sec__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 14px;
  margin-bottom: 14px;
}

.page-faq .faq-sec__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--teal);
  border: 1px solid var(--line-strong);
  padding: 2px 8px;
  flex: none;
}

.page-faq .faq-sec__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.45rem, 3.6vw, 2.1rem);
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-sec__lead {
  margin: 0;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.82;
  color: var(--smoke);
}

.page-faq .faq-note {
  margin: clamp(16px, 2.4vw, 22px) 0 0;
  padding-left: 12px;
  border-left: 2px solid var(--bronze);
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .faq-note a {
  color: var(--teal);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 179, 163, 0.42);
  transition: border-color 0.22s var(--ease);
}

.page-faq .faq-note a:hover,
.page-faq .faq-note a:focus-visible {
  border-bottom-color: var(--coral);
}

/* ---------- 版本卡片 ---------- */
.page-faq .guide-cards {
  display: grid;
  gap: 1px;
  margin-top: clamp(18px, 2.6vw, 26px);
  background: var(--line);
  border: 1px solid var(--line-strong);
}

.page-faq .guide-card {
  background: var(--graphite);
  padding: clamp(16px, 2.4vw, 22px);
  transition: background-color 0.24s var(--ease);
}

.page-faq .guide-card:hover {
  background: #222d34;
}

.page-faq .guide-card__k {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  color: var(--bronze);
}

.page-faq .guide-card__v {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.7rem, 4vw, 2.1rem);
  line-height: 1.1;
  color: var(--paper);
}

.page-faq .guide-card__d {
  margin: 8px 0 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--smoke);
}

/* ---------- 纸银阅读区与三步 ---------- */
.page-faq .faq-section--paper {
  margin-block: clamp(24px, 3.6vw, 40px);
  padding: clamp(20px, 3.2vw, 36px);
  background: var(--paper);
  color: var(--ink);
  border: 1px solid var(--faq-line-paper);
}

.page-faq .faq-section--paper .faq-sec__num {
  color: var(--deep-teal);
  border-color: rgba(15, 94, 90, 0.42);
}

.page-faq .faq-section--paper .faq-sec__title {
  color: var(--ink);
}

.page-faq .faq-section--paper .faq-sec__lead {
  color: var(--faq-ink-soft);
}

.page-faq .steps-wrap {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
  margin-top: clamp(18px, 2.6vw, 26px);
}

.page-faq .steps {
  position: relative;
  display: grid;
  gap: 0;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .steps::before {
  content: "";
  position: absolute;
  left: 19px;
  top: 20px;
  bottom: 26px;
  width: 1px;
  background: rgba(15, 94, 90, 0.36);
}

.page-faq .step {
  position: relative;
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 2px 14px;
  padding: 14px 0;
  border-top: 1px solid var(--faq-line-paper);
}

.page-faq .step:first-child {
  border-top: 0;
  padding-top: 4px;
}

.page-faq .step__num {
  grid-row: span 2;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--deep-teal);
  background: var(--paper);
  padding-top: 3px;
}

.page-faq .step__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--ink);
}

.page-faq .step__text {
  margin: 4px 0 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--faq-ink-soft);
}

.page-faq .steps-figure {
  margin: 0;
  border: 1px solid rgba(15, 94, 90, 0.28);
  background: #dde3e5;
  overflow: hidden;
}

.page-faq .steps-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 9 / 7;
}

.page-faq .steps-figure__cap {
  padding: 9px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--deep-teal);
  border-top: 1px solid rgba(15, 94, 90, 0.22);
  background: rgba(247, 244, 239, 0.7);
}

/* ---------- 两栏说明 ---------- */
.page-faq .two-col {
  display: grid;
  gap: 18px;
  margin-top: clamp(18px, 2.6vw, 26px);
}

.page-faq .col-block {
  border-top: 1px solid var(--line-strong);
  padding-top: 14px;
}

.page-faq .col-block h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--paper);
}

.page-faq .col-block ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .col-block li {
  position: relative;
  padding-left: 17px;
  font-size: 14px;
  line-height: 1.78;
  color: var(--smoke);
}

.page-faq .col-block li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.66em;
  width: 6px;
  height: 6px;
  border: 1px solid var(--teal);
  transform: rotate(45deg);
}

.page-faq .col-block strong {
  color: var(--paper);
  font-weight: 700;
}

/* ---------- 三维度对照 ---------- */
.page-faq .dim-grid {
  display: grid;
  gap: 12px;
  margin-top: clamp(18px, 2.6vw, 26px);
}

.page-faq .dim {
  position: relative;
  padding: 18px 18px 20px;
  background: var(--graphite);
  border: 1px solid var(--line);
  transition: border-color 0.24s var(--ease), transform 0.24s var(--ease);
}

.page-faq .dim::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  width: 12px;
  height: 12px;
  border-top: 2px solid var(--teal);
  border-left: 2px solid var(--teal);
}

.page-faq .dim:hover {
  border-color: var(--teal);
  transform: translateY(-2px);
}

.page-faq .dim__k {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  color: var(--bronze);
}

.page-faq .dim__title {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--paper);
}

.page-faq .dim__text {
  margin: 8px 0 0;
  font-size: 13.8px;
  line-height: 1.76;
  color: var(--smoke);
}

.page-faq .faq-read {
  margin: clamp(18px, 2.6vw, 24px) 0 0;
  max-width: 68ch;
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--smoke);
  padding-left: 14px;
  border-left: 1px solid var(--line-strong);
}

/* ---------- 手风琴问答 ---------- */
.page-faq .qa-list {
  display: grid;
  gap: 10px;
  margin-top: clamp(18px, 2.6vw, 26px);
}

.page-faq .qa {
  position: relative;
  background: var(--graphite);
  border: 1px solid var(--line);
  border-left: 2px solid var(--bronze);
  transition: border-color 0.24s var(--ease), background-color 0.24s var(--ease);
}

.page-faq .qa[open] {
  border-left-color: var(--teal);
  background: #212b32;
}

.page-faq .qa__q {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 10px;
  padding: 14px 44px 14px 16px;
  cursor: pointer;
  list-style: none;
  font-size: 15px;
  line-height: 1.6;
  color: var(--paper);
}

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

.page-faq .qa__q::after {
  content: "+";
  position: absolute;
  right: 15px;
  top: 13px;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--coral);
}

.page-faq .qa[open] .qa__q::after {
  content: "−";
}

.page-faq .qa__q:hover .qa__text,
.page-faq .qa__q:focus-visible .qa__text {
  color: var(--teal);
}

.page-faq .qa__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--teal);
}

.page-faq .qa__text {
  flex: 1 1 12ch;
  min-width: 0;
  transition: color 0.22s var(--ease);
}

.page-faq .qa__tag {
  flex: none;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.06em;
  border: 1px solid rgba(43, 179, 163, 0.42);
  color: var(--teal);
  padding: 1px 7px;
}

.page-faq .qa__a {
  padding: 0 18px 16px 16px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--smoke);
}

.page-faq .qa__a p {
  margin: 0;
  max-width: 66ch;
}

/* ---------- 版本时间线 ---------- */
.page-faq .timeline {
  list-style: none;
  margin: clamp(18px, 2.6vw, 26px) 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-faq .tl-item {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 4px 16px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
}

.page-faq .tl-item:first-child {
  border-top: 1px solid var(--line-strong);
}

.page-faq .tl-item__ver {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--teal);
  padding-top: 2px;
}

.page-faq .tl-item__body h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  color: var(--paper);
}

.page-faq .tl-item__body p {
  margin: 5px 0 0;
  font-size: 14px;
  line-height: 1.76;
  color: var(--smoke);
}

/* ---------- 支持卡 ---------- */
.page-faq .support {
  display: grid;
  gap: 1px;
  margin-top: clamp(20px, 3vw, 30px);
  background: var(--line);
  border: 1px solid var(--line-strong);
}

.page-faq .support__col {
  background: var(--graphite);
  padding: clamp(18px, 2.8vw, 26px);
}

.page-faq .support__col--alt {
  background: #162026;
}

.page-faq .support__k {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  color: var(--bronze);
}

.page-faq .support__d {
  margin: 8px 0 0;
  font-size: 13.8px;
  line-height: 1.76;
  color: var(--smoke);
}

.page-faq .support__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--line-soft);
}

.page-faq .support__label {
  flex: none;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

.page-faq .support__value {
  flex: 1 1 14ch;
  min-width: 0;
  overflow-wrap: anywhere;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--paper);
}

.page-faq .copy-btn {
  flex: none;
  padding: 5px 12px;
  background: transparent;
  border: 1px solid var(--line-strong);
  color: var(--bronze);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: border-color 0.22s var(--ease), color 0.22s var(--ease), background-color 0.22s var(--ease);
}

.page-faq .copy-btn:hover,
.page-faq .copy-btn:focus-visible {
  border-color: var(--teal);
  color: var(--teal);
  background: rgba(43, 179, 163, 0.1);
  outline: none;
}

.page-faq .support__col--alt .btn {
  margin-top: 14px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-faq .guide-cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .two-col {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 26px;
  }

  .page-faq .dim-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
  }

  .page-faq .support {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-intro {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
    align-items: center;
  }

  .page-faq .steps-wrap {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
  }

  .page-faq .qa__q {
    flex-wrap: nowrap;
    align-items: baseline;
    font-size: 15.5px;
  }

  .page-faq .qa__tag {
    margin-left: auto;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-shell {
    display: grid;
    grid-template-columns: 208px minmax(0, 1fr);
    gap: clamp(28px, 4vw, 60px);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-pad) + 96px);
    margin-bottom: 0;
    border-top: 1px solid var(--line-strong);
    padding-top: 14px;
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    margin-top: 14px;
  }

  .page-faq .faq-index__link {
    display: flex;
    white-space: normal;
    border: 0;
    border-left: 2px solid var(--line);
    padding: 7px 0 7px 12px;
    font-size: 13px;
    line-height: 1.5;
  }

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    border-left-color: var(--teal);
    background: linear-gradient(90deg, rgba(43, 179, 163, 0.12), transparent 70%);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .dim:hover {
    transform: none;
  }

  .page-faq .faq-index__link,
  .page-faq .dim,
  .page-faq .guide-card,
  .page-faq .qa,
  .page-faq .qa__text,
  .page-faq .copy-btn,
  .page-faq .breadcrumb__link,
  .page-faq .faq-note a {
    transition: none;
  }
}
<<<END>>>