.page-faq {
  --faq-line: var(--grid);
  --faq-ink-soft: rgba(246, 242, 233, 0.76);
  --faq-ink-line: rgba(220, 214, 200, 0.16);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  border-bottom: 1px solid var(--grid);
  background: var(--paper);
  padding: clamp(30px, 7vw, 88px) 0 clamp(28px, 5vw, 62px);
}

.page-faq .faq-hero__shape {
  display: none;
}

.page-faq .faq-hero__grid {
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(to right, rgba(13, 27, 42, 0.05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(13, 27, 42, 0.05) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: linear-gradient(to bottom, #000 0%, transparent 78%);
  -webkit-mask-image: linear-gradient(to bottom, #000 0%, transparent 78%);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  max-width: 44rem;
}

.page-faq .faq-hero__inner .display {
  margin: 0.35em 0 0.5em;
  color: var(--ink-900);
  font-size: clamp(28px, 6.4vw, 52px);
  line-height: 1.14;
  letter-spacing: -0.01em;
}

.page-faq .faq-hero__inner .lede {
  max-width: 40rem;
  color: var(--text);
}

.page-faq .faq-hero__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(20px, 3vw, 30px);
}

/* ---------- 通用区块头部 ---------- */
.page-faq .sec-head {
  max-width: 46rem;
  margin-bottom: clamp(24px, 3.6vw, 44px);
}

.page-faq .sec-head .serif-title {
  margin: 0.3em 0 0.5em;
  color: var(--ink-900);
  font-size: clamp(23px, 3.6vw, 36px);
  line-height: 1.22;
}

.page-faq .sec-head .lede {
  color: var(--text);
}

.page-faq .faq-link {
  color: var(--copper);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid var(--copper);
  padding-bottom: 1px;
  transition: color var(--ease), border-color var(--ease);
}

.page-faq .faq-link:hover,
.page-faq .faq-link:focus-visible {
  color: var(--ink-900);
  border-color: var(--ink-900);
}

.page-faq .faq-figure {
  margin: clamp(26px, 4vw, 48px) 0 0;
}

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

.page-faq .faq-figure .media__caption {
  margin-top: 10px;
  color: var(--mist);
  font-size: 14px;
  line-height: 1.7;
}

/* ---------- 三步上手 ---------- */
.page-faq .faq-steps-sec {
  background: var(--paper);
}

.page-faq .faq-steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(16px, 2vw, 24px);
}

.page-faq .faq-step {
  position: relative;
  background: var(--white);
  border: 1px solid var(--faq-line);
  border-top: 3px solid var(--copper);
  padding: clamp(20px, 2.6vw, 30px) clamp(18px, 2.2vw, 26px);
  transition: transform var(--ease), box-shadow var(--ease);
}

.page-faq .faq-step:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 26px rgba(13, 27, 42, 0.08);
}

.page-faq .faq-step__no {
  display: inline-block;
  color: var(--copper);
  font-size: 30px;
  line-height: 1;
  letter-spacing: -0.04em;
}

.page-faq .faq-step__title {
  margin: 14px 0 10px;
  color: var(--ink-900);
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  line-height: 1.35;
}

.page-faq .faq-step__body {
  margin: 0;
  color: var(--text);
  font-size: 15.5px;
  line-height: 1.8;
}

/* ---------- 版本对照（深色区） ---------- */
.page-faq .section--ink {
  background: var(--ink-900);
  background-image:
    linear-gradient(to right, rgba(220, 214, 200, 0.055) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(220, 214, 200, 0.055) 1px, transparent 1px);
  background-size: 52px 52px;
  color: var(--paper);
}

.page-faq .sec-head--ink .serif-title {
  color: var(--paper);
}

.page-faq .sec-head--ink .lede {
  color: var(--faq-ink-soft);
}

.page-faq .eyebrow--copper {
  color: var(--copper-light);
}

.page-faq .diff {
  border-top: 1px solid var(--faq-ink-line);
}

.page-faq .diff__head {
  display: none;
}

.page-faq .diff__group {
  padding: clamp(22px, 3vw, 34px) 0;
  border-bottom: 1px solid var(--faq-ink-line);
}

.page-faq .diff__group-title {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 0 0 16px;
  color: var(--paper);
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
}

.page-faq .diff__group-title .mono {
  color: var(--copper-light);
  font-size: 14px;
  letter-spacing: 0.06em;
}

.page-faq .diff__rows {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .diff__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border-top: 1px dashed var(--faq-ink-line);
  padding: 14px 0;
}

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

.page-faq .diff__cell {
  position: relative;
  padding: 4px 0;
}

.page-faq .diff__side {
  display: block;
  margin-bottom: 6px;
  font-size: 11.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.page-faq .diff__cell--old .diff__side {
  color: var(--mist);
}

.page-faq .diff__cell--new .diff__side {
  color: var(--copper-light);
}

.page-faq .diff__cell p {
  margin: 0;
  font-size: 15px;
  line-height: 1.82;
}

.page-faq .diff__cell--old p {
  color: rgba(246, 242, 233, 0.62);
}

.page-faq .diff__cell--new p {
  color: var(--paper);
}

.page-faq .diff__dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-top: 10px;
  background: var(--signal);
  vertical-align: middle;
}

.page-faq .faq-figure--diff {
  margin-top: clamp(28px, 4vw, 46px);
}

.page-faq .faq-figure--diff .media__caption {
  color: rgba(246, 242, 233, 0.55);
}

/* ---------- 小屏入口 ---------- */
.page-faq .faq-mobile-sec {
  background: var(--paper);
}

.page-faq .faq-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 36px);
}

.page-faq .faq-split__main .serif-title {
  margin: 0.3em 0 0.6em;
  color: var(--ink-900);
  font-size: clamp(23px, 3.6vw, 34px);
  line-height: 1.22;
}

.page-faq .faq-split__main .lede,
.page-faq .faq-split__main p {
  color: var(--text);
}

.page-faq .faq-split__main p {
  margin: 0 0 1em;
}

.page-faq .faq-split__aside {
  background: var(--white);
  border: 1px solid var(--faq-line);
  border-left: 3px solid var(--celadon);
  padding: clamp(20px, 2.6vw, 30px);
}

.page-faq .faq-aside__title {
  margin: 0 0 14px;
  color: var(--ink-900);
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
}

.page-faq .faq-ticklist {
  list-style: none;
  margin: 0 0 14px;
  padding: 0;
}

.page-faq .faq-ticklist li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  padding: 9px 0;
  border-top: 1px solid var(--grid);
  color: var(--text);
  font-size: 15px;
  line-height: 1.7;
}

.page-faq .faq-ticklist li:first-child {
  border-top: 0;
}

.page-faq .faq-tick {
  flex: 0 0 auto;
  color: var(--celadon);
  font-weight: 700;
  line-height: 1.7;
}

.page-faq .faq-split__aside .note {
  margin: 0;
  padding-left: 12px;
  border-left: 2px solid var(--copper);
  color: var(--mist);
  font-size: 13.5px;
  line-height: 1.75;
}

/* ---------- 收藏与直达 ---------- */
.page-faq .faq-collect-sec {
  background: var(--paper);
}

.page-faq .faq-collect .faq-collect__card {
  display: flex;
  flex-direction: column;
}

.page-faq .faq-collect .card__title {
  margin: 8px 0 10px;
  color: var(--ink-900);
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
}

.page-faq .faq-collect .card__body {
  flex: 1 1 auto;
  margin: 0 0 14px;
  color: var(--text);
  font-size: 15px;
  line-height: 1.78;
}

.page-faq .faq-collect .card__meta {
  color: var(--copper);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.page-faq .faq-collect__tip {
  margin: clamp(20px, 3vw, 32px) 0 0;
  padding: 16px 18px;
  border-left: 3px solid var(--copper);
  background: rgba(184, 122, 60, 0.07);
  color: var(--text);
  font-size: 14.5px;
  line-height: 1.8;
}

/* ---------- 常见问答 ---------- */
.page-faq .faq-faq-sec {
  background: var(--white);
  border-top: 1px solid var(--grid);
  border-bottom: 1px solid var(--grid);
}

.page-faq .faq-list {
  border-top: 1px solid var(--grid);
}

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

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: clamp(16px, 2.2vw, 22px) 0;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-item__no {
  flex: 0 0 auto;
  min-width: 34px;
  padding-top: 2px;
  color: var(--copper);
  font-size: 12.5px;
  letter-spacing: 0.06em;
}

.page-faq .faq-item__text {
  flex: 1 1 auto;
  color: var(--ink-900);
  font-family: var(--font-display);
  font-size: 16.5px;
  font-weight: 600;
  line-height: 1.6;
}

.page-faq .faq-item__sign {
  flex: 0 0 auto;
  position: relative;
  width: 14px;
  height: 14px;
  margin-top: 7px;
}

.page-faq .faq-item__sign::before,
.page-faq .faq-item__sign::after {
  content: "";
  position: absolute;
  background: var(--ink-500);
  transition: transform var(--ease), opacity var(--ease);
}

.page-faq .faq-item__sign::before {
  top: 6px;
  left: 0;
  width: 14px;
  height: 1.5px;
}

.page-faq .faq-item__sign::after {
  left: 6px;
  top: 0;
  width: 1.5px;
  height: 14px;
}

.page-faq .faq-item[open] .faq-item__sign::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .faq-item[open] .faq-item__text {
  color: var(--copper);
}

.page-faq .faq-item__a {
  padding: 0 0 clamp(18px, 2.4vw, 24px) 46px;
}

.page-faq .faq-item__a p {
  margin: 0;
  max-width: 54rem;
  color: var(--text);
  font-size: 15px;
  line-height: 1.85;
}

/* ---------- 人工协助 ---------- */
.page-faq .faq-help-sec {
  background: var(--paper);
}

.page-faq .faq-help {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 40px);
  align-items: start;
}

.page-faq .faq-help__main .serif-title {
  margin: 0.3em 0 0.6em;
  color: var(--ink-900);
  font-size: clamp(23px, 3.6vw, 34px);
  line-height: 1.22;
}

.page-faq .faq-help__main p {
  margin: 0 0 1em;
  color: var(--text);
}

.page-faq .faq-help__main .btn {
  margin-top: 8px;
}

.page-faq .faq-contact {
  list-style: none;
  margin: 0;
  padding: clamp(20px, 2.6vw, 28px);
  background: var(--ink-900);
  border-left: 3px solid var(--copper);
}

.page-faq .faq-contact__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--faq-ink-line);
}

.page-faq .faq-contact__label {
  flex: 0 0 auto;
  min-width: 42px;
  color: var(--copper-light);
  font-size: 11.5px;
  letter-spacing: 0.14em;
}

.page-faq .faq-contact__val {
  flex: 1 1 12rem;
  color: var(--paper);
  font-size: 15px;
  word-break: break-all;
}

.page-faq .faq-contact .copy-btn {
  flex: 0 0 auto;
  background: transparent;
  color: var(--copper-light);
  border: 1px solid var(--copper);
  padding: 6px 12px;
  font-size: 12px;
  cursor: pointer;
  transition: background var(--ease), color var(--ease);
}

.page-faq .faq-contact .copy-btn:hover,
.page-faq .faq-contact .copy-btn:focus-visible {
  background: var(--copper);
  color: var(--ink-900);
}

.page-faq .faq-contact .copy-btn.is-done {
  background: var(--celadon);
  border-color: var(--celadon);
  color: var(--white);
}

.page-faq .faq-contact__note {
  padding: 14px 0 0;
  color: var(--faq-ink-soft);
  font-size: 13.5px;
  line-height: 1.8;
}

/* ---------- 窄屏适配 ---------- */
@media (max-width: 519px) {
  .page-faq .faq-hero__acts .btn {
    flex: 1 1 100%;
    text-align: center;
  }

  .page-faq .faq-item__a {
    padding-left: 0;
  }

  .page-faq .faq-contact__row {
    align-items: flex-start;
  }
}

/* ---------- 平板 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-steps {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-faq .faq-step + .faq-step::before {
    content: "";
    position: absolute;
    top: 50%;
    left: calc(-1 * var(--gap) + 2px);
    width: calc(var(--gap) - 8px);
    height: 1px;
    background: var(--copper);
  }

  .page-faq .faq-steps .faq-step {
    position: relative;
  }

  .page-faq .diff__head {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    padding: 14px 0;
    border-bottom: 1px solid var(--faq-ink-line);
  }

  .page-faq .diff__head-cell {
    color: var(--mist);
    font-size: 11.5px;
    letter-spacing: 0.16em;
    text-transform: uppercase;
  }

  .page-faq .diff__head-cell:last-child {
    color: var(--copper-light);
    padding-left: clamp(16px, 2.4vw, 32px);
  }

  .page-faq .diff__row {
    grid-template-columns: 1fr 1fr;
    gap: 0 clamp(16px, 2.4vw, 32px);
    padding: 16px 0;
    border-top: 1px solid var(--faq-ink-line);
  }

  .page-faq .diff__side {
    display: none;
  }

  .page-faq .diff__cell--old {
    padding-right: clamp(16px, 2.4vw, 32px);
    border-right: 1px solid var(--faq-ink-line);
  }

  .page-faq .diff__cell--new {
    padding-left: clamp(16px, 2.4vw, 32px);
  }

  .page-faq .faq-split {
    grid-template-columns: 1.55fr 1fr;
    align-items: start;
  }

  .page-faq .faq-help {
    grid-template-columns: 1.15fr 1fr;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 1024px) {
  .page-faq .faq-hero__shape {
    display: block;
    position: absolute;
    top: -12%;
    right: 0;
    width: 38%;
    height: 124%;
    background-color: var(--ink-900);
    background-image:
      linear-gradient(to right, rgba(220, 214, 200, 0.08) 1px, transparent 1px),
      linear-gradient(to bottom, rgba(220, 214, 200, 0.08) 1px, transparent 1px);
    background-size: 40px 40px;
    clip-path: polygon(28% 0, 100% 0, 100% 100%, 0 100%);
    pointer-events: none;
  }

  .page-faq .faq-hero__inner {
    max-width: 40rem;
  }

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

  .page-faq .faq-collect .span-3 {
    grid-column: span 1;
  }
}

@media (min-width: 1240px) {
  .page-faq .diff__group {
    padding: clamp(26px, 3vw, 40px) 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-step,
  .page-faq .faq-link,
  .page-faq .faq-contact .copy-btn,
  .page-faq .faq-item__sign::before,
  .page-faq .faq-item__sign::after {
    transition: none;
  }

  .page-faq .faq-step:hover {
    transform: none;
  }
}
<<<END>>>