.page-faq {
  --faq-gap: clamp(16px, 2.6vw, 32px);
  --faq-pad: clamp(16px, 2.8vw, 28px);
  --faq-sec: clamp(38px, 6vw, 76px);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.85;
  padding-bottom: clamp(36px, 6vw, 80px);
  overflow-x: clip;
}

.page-faq *,
.page-faq *::before,
.page-faq *::after {
  box-sizing: border-box;
}

.page-faq h1,
.page-faq h2,
.page-faq h3 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: .01em;
  text-transform: uppercase;
  margin: 0;
}

.page-faq p {
  margin: 0;
  max-width: 36em;
}

.page-faq a {
  color: var(--cyan);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding-block: clamp(16px, 3vw, 30px) clamp(26px, 4.4vw, 48px);
  background:
    radial-gradient(circle at 88% -10%, rgba(47, 243, 214, .16), transparent 58%),
    linear-gradient(160deg, rgba(18, 48, 42, .55) 0%, transparent 62%);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: var(--faq-gap);
  margin-top: clamp(14px, 2.4vw, 26px);
}

.page-faq h1 {
  font-size: clamp(30px, 6.2vw, 60px);
  letter-spacing: -.012em;
  margin-top: 12px;
}

.page-faq .faq-hero__copy .lede {
  margin-top: clamp(12px, 2vw, 20px);
  color: var(--mute);
  font-size: 15px;
  max-width: 32em;
}

.page-faq .faq-hero__media {
  margin: 0;
  height: clamp(168px, 27vw, 300px);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--panel-2);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(.9) brightness(.82);
}

.page-faq .faq-jump {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 16px;
  margin-top: clamp(18px, 3vw, 30px);
}

.page-faq .faq-jump .chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .faq-jump .chip {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(11, 31, 26, .72);
  color: var(--ink);
  font-size: 13px;
  text-decoration: none;
  transition: border-color .18s var(--ease), color .18s var(--ease), background .18s var(--ease);
}

.page-faq .faq-jump .chip:hover,
.page-faq .faq-jump .chip:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(18, 48, 42, .9);
}

/* ---------- 通用章节 ---------- */
.page-faq .faq-section {
  padding-top: var(--faq-sec);
  scroll-margin-top: clamp(72px, 13vw, 104px);
}

.page-faq .section-head {
  display: grid;
  gap: 10px;
  margin-bottom: clamp(18px, 3vw, 30px);
  max-width: 62ch;
}

.page-faq .faq-h2 {
  font-size: clamp(24px, 4vw, 42px);
}

.page-faq .section-head .lede {
  color: var(--mute);
}

/* ---------- 三步上手 ---------- */
.page-faq .faq-steps__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(20px, 3vw, 36px);
}

.page-faq .faq-step {
  position: relative;
  display: grid;
  gap: 10px;
  align-content: start;
  padding: var(--faq-pad);
  border: 1px solid var(--line);
  background: linear-gradient(160deg, var(--panel) 0%, rgba(11, 31, 26, .55) 100%);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 0 100%);
}

.page-faq .faq-step__num {
  font-family: var(--font-mono);
  font-size: clamp(28px, 5vw, 44px);
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--cyan);
}

.page-faq .faq-step h3 {
  font-size: clamp(17px, 2.4vw, 22px);
  color: var(--ink);
}

.page-faq .faq-step p {
  font-size: 14px;
  color: var(--mute);
  max-width: 30em;
}

.page-faq .faq-step .faq-step__result {
  margin-top: 2px;
  padding-top: 10px;
  border-top: 1px dashed var(--line);
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--cyan-dim);
}

/* ---------- 高频问题 ---------- */
.page-faq .faq-answers__grid {
  display: grid;
  gap: var(--faq-gap);
}

.page-faq .faq-group {
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 2px solid var(--line);
  transition: border-color .18s var(--ease);
}

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

.page-faq .faq-group[open] {
  border-left-color: var(--cyan);
}

.page-faq .faq-group > summary {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 14px 16px;
  list-style: none;
  cursor: pointer;
  color: var(--ink);
}

.page-faq .faq-group > summary::-webkit-details-marker {
  display: none;
}

.page-faq .faq-group > summary:focus-visible {
  outline: 1px solid var(--cyan);
  outline-offset: -3px;
}

.page-faq .faq-group__idx {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--cyan);
}

.page-faq .faq-group__title {
  font-family: var(--font-display);
  font-size: clamp(17px, 2.6vw, 21px);
  letter-spacing: .03em;
  text-transform: uppercase;
}

.page-faq .faq-group > summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--cyan);
}

.page-faq .faq-group[open] > summary::after {
  content: "–";
}

.page-faq .faq-group__body {
  display: grid;
  gap: 12px;
  padding: 14px 16px 18px;
  border-top: 1px solid var(--line);
  background: rgba(6, 18, 15, .45);
}

.page-faq .faq-item h3 {
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.55;
  letter-spacing: 0;
  text-transform: none;
  color: var(--ink);
}

.page-faq .faq-item p {
  margin-top: 4px;
  font-size: 13.5px;
  color: var(--mute);
  max-width: 34em;
}

/* 字段速查栏 */
.page-faq .faq-fields {
  display: grid;
  gap: 8px;
  align-content: start;
  margin-top: clamp(20px, 3vw, 0px);
}

.page-faq .faq-field {
  display: grid;
  gap: 2px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--cyan-dim);
  background: rgba(11, 31, 26, .74);
  transition: background .18s var(--ease), border-color .18s var(--ease), box-shadow .18s var(--ease);
}

.page-faq .faq-field:hover {
  background: rgba(18, 48, 42, .92);
  border-left-color: var(--cyan);
  box-shadow: 0 0 0 1px rgba(47, 243, 214, .22);
}

.page-faq .faq-field__name {
  font-family: var(--font-display);
  font-size: 14px;
  letter-spacing: .07em;
  text-transform: uppercase;
  color: var(--ink);
}

.page-faq .faq-field__desc {
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--mute);
}

.page-faq .faq-field__sample {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan-dim);
  transition: color .18s var(--ease);
}

.page-faq .faq-field:hover .faq-field__sample {
  color: var(--cyan);
}

/* ---------- 读表 ---------- */
.page-faq .faq-reading__grid {
  display: grid;
  gap: var(--faq-gap);
}

.page-faq .faq-reading__diagram {
  padding: clamp(12px, 2vw, 20px);
  border: 1px solid var(--line);
  background: var(--panel);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 22px 100%, 0 calc(100% - 22px));
}

.page-faq .faq-diagram {
  display: block;
  width: 100%;
  height: auto;
}

.page-faq .faq-diagram__frame {
  fill: none;
  stroke: var(--line);
  stroke-dasharray: 4 6;
}

.page-faq .faq-diagram__block {
  fill: rgba(18, 48, 42, .85);
  stroke: var(--line);
}

.page-faq .faq-diagram__block--accent {
  fill: rgba(47, 243, 214, .1);
  stroke: var(--cyan-dim);
}

.page-faq .faq-diagram text {
  font-family: var(--font-mono);
  font-size: 13px;
  fill: var(--ink);
}

.page-faq .faq-diagram .faq-diagram__hint {
  font-size: 11px;
  fill: var(--mute);
}

.page-faq .faq-reading__media {
  margin: 12px 0 0;
}

.page-faq .faq-reading__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border: 1px solid var(--line);
  filter: saturate(.85);
}

.page-faq .faq-reading__media figcaption {
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--mute);
}

.page-faq .faq-reading__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-faq .faq-reading__list li {
  padding-left: 14px;
  border-left: 2px solid var(--line);
  transition: border-color .18s var(--ease);
}

.page-faq .faq-reading__list li:hover {
  border-left-color: var(--cyan);
}

.page-faq .faq-reading__list h3 {
  font-size: 15px;
  letter-spacing: .05em;
  text-transform: none;
  color: var(--cyan);
  margin-bottom: 4px;
}

.page-faq .faq-reading__list p {
  font-size: 13.5px;
  color: var(--mute);
  max-width: 32em;
}

/* ---------- 两版对照 ---------- */
.page-faq .faq-compare__cards {
  display: grid;
  gap: var(--faq-gap);
}

.page-faq .faq-compare__card {
  display: grid;
  gap: 4px;
  align-content: start;
  padding: var(--faq-pad);
  border: 1px solid var(--line);
  background: var(--panel);
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 0 100%);
}

.page-faq .faq-compare__card--alt {
  background: var(--panel-2);
  border-color: var(--cyan-dim);
}

.page-faq .faq-compare__card h3 {
  font-size: clamp(17px, 2.3vw, 21px);
  color: var(--ink);
  margin: 8px 0 4px;
}

.page-faq .faq-compare__line {
  display: grid;
  gap: 2px;
  padding: 10px 0;
  border-top: 1px dashed var(--line);
}

.page-faq .faq-compare__key {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--cyan-dim);
}

.page-faq .faq-compare__val {
  font-size: 14px;
  color: var(--ink);
  line-height: 1.75;
}

.page-faq .faq-compare__fit {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--orange);
}

.page-faq .faq-compare__more {
  margin-top: clamp(16px, 2.5vw, 24px);
  color: var(--mute);
  font-size: 14px;
}

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

/* ---------- 更新与纠错 ---------- */
.page-faq .faq-updates__grid {
  display: grid;
  gap: var(--faq-gap);
}

.page-faq .faq-updates__stat {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  margin: 14px 0 12px;
}

.page-faq .faq-updates__num {
  font-family: var(--font-mono);
  font-size: clamp(42px, 8vw, 78px);
  line-height: .95;
  letter-spacing: -.04em;
  color: var(--cyan);
}

.page-faq .faq-updates__unit {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .08em;
  color: var(--mute);
}

.page-faq .faq-updates__main > p {
  color: var(--mute);
  font-size: 14px;
}

.page-faq .faq-updates__list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .faq-updates__list li {
  position: relative;
  padding-left: 20px;
  font-size: 14px;
  color: var(--ink);
}

.page-faq .faq-updates__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 10px;
  height: 2px;
  background: var(--cyan-dim);
}

.page-faq .faq-updates__link {
  margin-top: 16px;
  font-size: 13.5px;
  color: var(--mute);
}

.page-faq .faq-correct {
  display: grid;
  gap: 12px;
  align-content: start;
  padding: var(--faq-pad);
  border: 1px solid var(--line);
  border-top: 2px solid var(--orange);
  background: var(--panel);
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 0 100%);
}

.page-faq .faq-correct h3 {
  font-size: clamp(17px, 2.3vw, 21px);
  color: var(--ink);
}

.page-faq .faq-correct__steps {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: faqfix;
  display: grid;
  gap: 8px;
}

.page-faq .faq-correct__steps li {
  counter-increment: faqfix;
  position: relative;
  padding-left: 32px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mute);
}

.page-faq .faq-correct__steps li::before {
  content: counter(faqfix, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--orange);
  letter-spacing: .06em;
}

.page-faq .faq-correct > p {
  font-size: 13px;
  color: var(--mute);
  max-width: 30em;
}

.page-faq .faq-correct .btn {
  justify-self: start;
}

/* ---------- 悬浮返回索引 ---------- */
.page-faq .faq-backtop {
  position: fixed;
  right: clamp(12px, 3vw, 28px);
  bottom: clamp(12px, 3vw, 28px);
  z-index: 20;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 13px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  text-decoration: none;
  color: var(--cyan);
  background: rgba(6, 18, 15, .92);
  border: 1px solid var(--cyan-dim);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 8px 100%, 0 calc(100% - 8px));
  transition: background .18s var(--ease), border-color .18s var(--ease);
}

.page-faq .faq-backtop:hover,
.page-faq .faq-backtop:focus-visible {
  background: rgba(18, 48, 42, .95);
  border-color: var(--cyan);
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
  }

  .page-faq .faq-reading__media img {
    aspect-ratio: 16 / 10;
  }
}

@media (min-width: 860px) {
  .page-faq .faq-steps__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-step:not(:last-child)::after {
    content: "";
    position: absolute;
    top: 34px;
    right: -34px;
    width: 26px;
    height: 2px;
    background: var(--cyan-dim);
    transform: rotate(-30deg);
    transform-origin: right center;
  }

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

  .page-faq .faq-updates__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
  }
}

@media (min-width: 900px) {
  .page-faq .faq-reading__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }
}

@media (min-width: 1040px) {
  .page-faq .faq-answers__grid {
    grid-template-columns: minmax(0, 1fr) 288px;
    align-items: start;
  }

  .page-faq .faq-fields {
    position: sticky;
    top: 24px;
    margin-top: 0;
  }
}

@media (max-width: 479px) {
  .page-faq .faq-group > summary {
    padding: 12px 14px;
    gap: 10px;
  }

  .page-faq .faq-group__body {
    padding: 12px 14px 16px;
  }

  .page-faq .faq-jump .chip {
    min-height: 32px;
    padding: 0 12px;
    font-size: 12.5px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
  }
}
<<<END>>>