.page-faq {
  --faq-side-w: 272px;
  --faq-dot: var(--muted);
  background: var(--ink);
  color: var(--body-text);
}

.page-faq .breadcrumb {
  padding: 16px 0 0;
  font-size: 12px;
}

/* ---------- 页首 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 5vw, 56px) 0 clamp(32px, 6vw, 76px);
  background:
    radial-gradient(58% 68% at 84% 8%, rgba(107, 79, 168, .32), transparent 62%),
    radial-gradient(52% 62% at 4% 0%, rgba(200, 255, 61, .15), transparent 60%),
    var(--ink);
  border-bottom: 1px solid var(--hairline);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(0deg, rgba(242, 245, 240, .035) 0 1px, transparent 1px 4px);
  opacity: .7;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  grid-template-columns: 1fr;
}

.page-faq .faq-hero__copy {
  min-width: 0;
}

.page-faq .faq-hero h1 {
  margin: 12px 0 0;
  max-width: 17ch;
  font-family: var(--font-display);
  font-size: clamp(32px, 6.4vw, 66px);
  line-height: 1.04;
  font-weight: 800;
  letter-spacing: -.005em;
  color: var(--paper);
}

.page-faq .faq-hero .lede {
  margin: 18px 0 0;
  max-width: 54ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.75;
  color: var(--body-text);
}

.page-faq .faq-hero__facts {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .faq-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-left: 12px;
  border-left: 2px solid var(--lime-line);
  font-size: 13px;
  line-height: 1.55;
  color: var(--muted);
}

.page-faq .faq-hero__facts .mono {
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--lime);
}

.page-faq .faq-hero__visual {
  min-width: 0;
}

.page-faq .media-frame {
  display: block;
  overflow: hidden;
  background:
    linear-gradient(140deg, rgba(200, 255, 61, .1), rgba(107, 79, 168, .22) 55%, rgba(5, 18, 14, .9));
}

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

.page-faq .faq-hero__visual .media-frame {
  border: 1px solid var(--hairline-strong);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
}

/* ---------- 问答工作台 ---------- */
.page-faq .faq-desk {
  padding: clamp(36px, 6vw, 68px) 0;
  background: var(--ink);
}

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

.page-faq .faq-side {
  position: relative;
  padding: 20px;
  background: var(--ink-soft);
  border: 1px solid var(--hairline);
}

.page-faq .faq-side::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg, var(--lime), rgba(200, 255, 61, 0) 72%);
}

.page-faq .faq-side__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 24px;
  letter-spacing: .04em;
  color: var(--paper);
}

.page-faq .faq-side__hint {
  margin: 0 0 16px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

.page-faq .faq-side__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 20px;
}

.page-faq .faq-side__foot {
  display: grid;
  gap: 12px;
  padding-top: 16px;
  border-top: 1px solid var(--hairline);
}

.page-faq .faq-side__foot p {
  margin: 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--muted);
}

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

/* ---------- 问答条目 ---------- */
.page-faq .faq-list {
  min-width: 0;
  display: grid;
  gap: 12px;
}

.page-faq .faq-q {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--hairline);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
  transition: border-color .28s var(--ease), background .28s var(--ease);
}

.page-faq .faq-q:hover {
  border-color: var(--hairline-strong);
}

.page-faq .faq-q[data-open] {
  background: var(--ink-soft);
  border-color: var(--lime-line);
}

.page-faq .faq-q__btn {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  width: 100%;
  padding: 18px 20px;
  text-align: left;
  color: var(--paper);
}

.page-faq .faq-q__dot {
  width: 9px;
  height: 9px;
  flex: none;
  margin-top: 8px;
  border-radius: 50%;
  background: var(--muted);
  box-shadow: 0 0 0 1px rgba(155, 176, 166, .4);
  transition: background .22s var(--ease), box-shadow .22s var(--ease);
}

.page-faq .faq-q[data-open] .faq-q__dot {
  background: var(--lime);
  box-shadow: 0 0 0 4px rgba(200, 255, 61, .18);
}

.page-faq .faq-q__body {
  display: block;
  min-width: 0;
}

.page-faq .faq-q__tag {
  display: inline-block;
  margin-bottom: 8px;
  padding: 1px 8px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .12em;
  color: var(--sand);
  border: 1px solid var(--sand-line);
}

.page-faq .faq-q__title {
  display: block;
  font-size: clamp(15px, 1.9vw, 17px);
  line-height: 1.5;
  font-weight: 600;
  color: var(--paper);
}

.page-faq .faq-q[data-open] .faq-q__title {
  color: var(--lime-soft);
}

.page-faq .faq-q .expand-panel-inner {
  padding: 0 20px 20px 41px;
}

.page-faq .faq-q__answer {
  margin: 0 0 14px;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--body-text);
}

.page-faq .faq-q__steps {
  list-style: none;
  counter-reset: faqstep;
  margin: 0;
  padding: 0 0 0 18px;
  display: grid;
  gap: 10px;
  border-left: 1px solid var(--hairline-strong);
}

.page-faq .faq-q__steps li {
  position: relative;
  counter-increment: faqstep;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--muted);
}

.page-faq .faq-q__steps li::before {
  content: "";
  position: absolute;
  left: -22px;
  top: 7px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--lime-soft);
}

.page-faq .faq-q__steps a {
  color: var(--lime);
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* ---------- 三步自查 ---------- */
.page-faq .faq-troubleshoot {
  padding: clamp(40px, 7vw, 80px) 0;
  background: linear-gradient(180deg, var(--ink) 0%, var(--ink-soft) 100%);
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
}

.page-faq .faq-troubleshoot__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 48px);
  align-items: center;
}

.page-faq .faq-troubleshoot__copy {
  min-width: 0;
}

.page-faq .section-title {
  margin: 10px 0 0;
  max-width: 22ch;
  font-family: var(--font-display);
  font-size: clamp(26px, 3.6vw, 40px);
  line-height: 1.1;
  font-weight: 800;
  letter-spacing: .01em;
  color: var(--paper);
}

.page-faq .faq-troubleshoot .lede,
.page-faq .faq-contact .lede {
  margin: 14px 0 0;
  max-width: 52ch;
  font-size: clamp(14px, 1.5vw, 16px);
  line-height: 1.75;
  color: var(--body-text);
}

.page-faq .faq-steps {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
}

.page-faq .faq-steps > li {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 14px;
  padding: 18px 0;
  border-top: 1px solid var(--hairline);
}

.page-faq .faq-steps > li:last-child {
  border-bottom: 1px solid var(--hairline);
}

.page-faq .faq-steps__no {
  font-family: var(--font-mono);
  font-size: 24px;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--lime);
}

.page-faq .faq-steps h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 20px;
  letter-spacing: .03em;
  color: var(--paper);
}

.page-faq .faq-steps p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
}

.page-faq .faq-steps p a {
  color: var(--lime);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.page-faq .faq-troubleshoot__visual {
  min-width: 0;
}

.page-faq .faq-troubleshoot__visual .media-frame {
  border: 1px solid var(--hairline-strong);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
}

/* ---------- 术语速查 ---------- */
.page-faq .faq-glossary {
  padding: clamp(40px, 7vw, 80px) 0;
  background: var(--ink);
}

.page-faq .faq-terms {
  width: 100%;
  border-collapse: collapse;
  margin-top: 24px;
  font-size: 14px;
}

.page-faq .faq-terms caption {
  caption-side: top;
  text-align: left;
  padding-bottom: 10px;
  font-size: 12px;
  color: var(--muted);
}

.page-faq .faq-terms th,
.page-faq .faq-terms td {
  padding: 14px 16px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--hairline);
}

.page-faq .faq-terms thead th {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--sand);
  background: var(--ink-soft);
  border-bottom: 1px solid var(--sand-line);
}

.page-faq .faq-terms tbody th {
  width: 30%;
  font-family: var(--font-display);
  font-size: 17px;
  letter-spacing: .04em;
  color: var(--lime-soft);
  white-space: nowrap;
}

.page-faq .faq-terms tbody td {
  line-height: 1.72;
  color: var(--body-text);
}

.page-faq .faq-terms tbody tr:hover {
  background: rgba(18, 49, 40, .55);
}

/* ---------- 联系 ---------- */
.page-faq .faq-contact {
  padding: clamp(40px, 7vw, 80px) 0;
  background:
    radial-gradient(70% 90% at 92% 0%, rgba(200, 255, 61, .12), transparent 62%),
    var(--ink-soft);
  border-top: 1px solid var(--hairline);
}

.page-faq .faq-contact__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}

.page-faq .faq-contact__copy {
  min-width: 0;
}

.page-faq .faq-contact__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: stretch;
  margin-top: 24px;
}

.page-faq .faq-mail {
  display: inline-flex;
  flex-direction: column;
  gap: 5px;
  align-items: flex-start;
  max-width: 100%;
  padding: 13px 18px;
  text-align: left;
  font: inherit;
  color: var(--paper);
  background: var(--panel);
  border: 1px solid var(--lime-line);
  cursor: pointer;
  transition: border-color .2s var(--ease), background .2s var(--ease);
}

.page-faq .faq-mail:hover {
  border-color: var(--lime);
}

.page-faq .faq-mail__label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .14em;
  color: var(--muted);
}

.page-faq .faq-mail__value {
  font-family: var(--font-mono);
  font-size: 13.5px;
  letter-spacing: -.01em;
  color: var(--lime-soft);
  word-break: break-all;
}

.page-faq .faq-mail[data-copied="true"] {
  background: rgba(200, 255, 61, .1);
  border-color: var(--lime);
}

.page-faq .faq-mail[data-copied="true"] .faq-mail__label {
  color: var(--lime);
}

.page-faq .faq-contact__panel {
  min-width: 0;
}

.page-faq .faq-contact__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
}

.page-faq .faq-contact__list li {
  display: grid;
  gap: 3px;
  padding: 12px 0;
  border-bottom: 1px solid var(--hairline);
}

.page-faq .faq-contact__list li:last-child {
  border-bottom: 0;
}

.page-faq .faq-contact__k {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .14em;
  color: var(--muted);
}

.page-faq .faq-contact__v {
  font-size: 14px;
  line-height: 1.6;
  color: var(--paper);
}

.page-faq .faq-contact__note {
  margin: 14px 0 0;
  padding-left: 10px;
  border-left: 2px solid var(--sand-line);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 断点 ---------- */
@media (min-width: 620px) {
  .page-faq .faq-hero__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.24fr) minmax(0, .76fr);
    align-items: end;
  }

  .page-faq .faq-troubleshoot__inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  }

  .page-faq .faq-contact__inner {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
  }
}

@media (min-width: 960px) {
  .page-faq .faq-desk__inner {
    grid-template-columns: var(--faq-side-w) minmax(0, 1fr);
  }

  .page-faq .faq-side {
    position: sticky;
    top: 96px;
  }

  .page-faq .faq-side__chips {
    flex-direction: column;
    flex-wrap: nowrap;
    align-items: stretch;
  }

  .page-faq .faq-side__chips .chip {
    width: 100%;
    justify-content: flex-start;
    text-align: left;
  }
}

@media (max-width: 640px) {
  .page-faq .faq-q__btn {
    padding: 16px 16px;
    gap: 10px;
  }

  .page-faq .faq-q .expand-panel-inner {
    padding: 0 16px 18px 37px;
  }

  .page-faq .faq-q__dot {
    margin-top: 7px;
  }

  .page-faq .faq-steps > li {
    grid-template-columns: 40px minmax(0, 1fr);
    gap: 12px;
  }

  .page-faq .faq-steps__no {
    font-size: 20px;
  }

  .page-faq .faq-terms th,
  .page-faq .faq-terms td {
    padding: 12px 10px;
    font-size: 13px;
  }

  .page-faq .faq-terms tbody th {
    width: 38%;
    white-space: normal;
    font-size: 15px;
  }

  .page-faq .faq-mail {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-q,
  .page-faq .faq-q__dot,
  .page-faq .faq-mail {
    transition: none;
  }
}
<<<END>>>