.page-faq {
  --faq-line: rgba(169, 199, 194, .26);
  --faq-line-strong: rgba(169, 199, 194, .52);
  --faq-pad: clamp(16px, 4vw, 40px);
  background: var(--bone);
  color: var(--night);
  font-family: var(--font-body);
  overflow-x: hidden;
}

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

.page-faq a {
  color: inherit;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  background: var(--night);
  color: var(--bone);
  padding-top: calc(var(--header-h) + clamp(28px, 6vw, 56px));
  padding-bottom: clamp(20px, 4vw, 36px);
}

.page-faq .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  list-style: none;
  margin: 0 0 clamp(20px, 3vw, 32px);
  padding: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--on-dark-dim);
}

.page-faq .breadcrumb li {
  display: flex;
  align-items: center;
  gap: 6px;
}

.page-faq .breadcrumb li + li::before {
  content: "/";
  color: var(--faq-line-strong);
}

.page-faq .breadcrumb a {
  color: var(--mist);
  text-decoration: none;
}

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

.page-faq .eyebrow {
  color: var(--amber);
  margin: 0 0 14px;
}

.page-faq .faq-title {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(33px, 7vw, 76px);
  line-height: 1.05;
  letter-spacing: -.02em;
  color: var(--cold);
  margin: 0 0 clamp(16px, 2.5vw, 24px);
  max-width: 16em;
}

.page-faq .faq-lede {
  font-size: 16px;
  line-height: 1.9;
  color: var(--on-dark);
  max-width: 36em;
  margin: 0;
}

.page-faq .faq-shot {
  margin: clamp(26px, 4vw, 46px) 0 0;
  border: 1px solid var(--faq-line-strong);
}

/* ---------- 三步自检 ---------- */

.page-faq .faq-steps {
  background: var(--night);
  color: var(--bone);
  padding: clamp(26px, 5vw, 44px) 0 clamp(40px, 6vw, 68px);
  border-top: 1px solid var(--faq-line);
  scroll-margin-top: calc(var(--header-h) + 16px);
}

.page-faq .steps-heading {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(24px, 3.6vw, 38px);
  line-height: 1.2;
  letter-spacing: -.01em;
  color: var(--cold);
  margin: 0 0 clamp(20px, 3vw, 30px);
  max-width: 20em;
}

.page-faq .steps-line {
  display: block;
  width: 100%;
  height: 4px;
  margin-bottom: clamp(18px, 3vw, 26px);
}

.page-faq .steps-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 28px);
}

.page-faq .step {
  position: relative;
  padding-left: 22px;
}

.page-faq .step-dot {
  position: absolute;
  left: 0;
  top: 18px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(46, 230, 200, .14);
}

.page-faq .step-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--amber);
  margin-bottom: 8px;
}

.page-faq .step-title {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.45;
  color: var(--cold);
}

.page-faq .step-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--on-dark);
}

/* ---------- 主体骨架 ---------- */

.page-faq .faq-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 4vw, 36px);
  padding-top: clamp(30px, 5vw, 56px);
  padding-bottom: clamp(48px, 7vw, 84px);
}

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

/* ---------- 症状索引 ---------- */

.page-faq .faq-toc {
  border-bottom: 1px solid var(--faq-line-strong);
  padding-bottom: 12px;
}

.page-faq .toc-title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--clay);
}

.page-faq .toc-list {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  list-style: none;
  margin: 0;
  padding: 0 0 4px;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-faq .toc-list li {
  flex: 0 0 auto;
}

.page-faq .toc-list a {
  display: block;
  padding: 7px 12px;
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--stone);
  text-decoration: none;
  border: 1px solid var(--faq-line-strong);
  border-radius: 999px;
  white-space: nowrap;
}

.page-faq .toc-list a:hover,
.page-faq .toc-list a:focus-visible {
  color: var(--night);
  border-color: var(--cyan);
  background: rgba(46, 230, 200, .08);
}

/* ---------- 症状区块 ---------- */

.page-faq .sym-sec {
  padding-top: clamp(26px, 4vw, 40px);
  margin-top: clamp(26px, 4vw, 40px);
  border-top: 1px solid var(--faq-line-strong);
  scroll-margin-top: calc(var(--header-h) + 16px);
}

.page-faq .sym-sec:first-child {
  padding-top: 0;
  margin-top: 0;
  border-top: 0;
}

.page-faq .sym-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 10px;
}

.page-faq .sym-head .index-num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--clay);
}

.page-faq .sym-title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(23px, 3.4vw, 34px);
  line-height: 1.15;
  letter-spacing: -.01em;
  color: var(--night);
  margin: 0;
}

.page-faq .sec-intro {
  margin: 0 0 clamp(16px, 2.5vw, 22px);
  font-size: 14px;
  line-height: 1.9;
  color: var(--stone);
  max-width: 42em;
}

.page-faq .sym-figure {
  margin: 0 0 clamp(16px, 2.5vw, 22px);
  max-width: 460px;
  border: 1px solid var(--faq-line-strong);
}

/* ---------- 折叠条目 ---------- */

.page-faq .sym {
  border-bottom: 1px solid var(--faq-line-strong);
}

.page-faq .sym-sum {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 15px 0;
}

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

.page-faq .sym-sum::marker {
  content: "";
}

.page-faq .sym-tag {
  flex: none;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .12em;
  color: var(--clay);
  border: 1px solid currentColor;
  border-radius: 999px;
  padding: 4px 10px;
  white-space: nowrap;
  transition: background-color .24s var(--ease), color .24s var(--ease), border-color .24s var(--ease);
}

.page-faq .sym[open] .sym-tag {
  background: var(--clay);
  border-color: var(--clay);
  color: var(--cold);
}

.page-faq .sym-q {
  flex: 1 1 auto;
  min-width: 0;
  font-size: 15px;
  font-weight: 500;
  line-height: 1.55;
  color: var(--night);
}

.page-faq .sym-chev {
  flex: none;
  width: 9px;
  height: 9px;
  margin-right: 3px;
  border-right: 1px solid var(--stone);
  border-bottom: 1px solid var(--stone);
  transform: rotate(45deg);
  transition: transform .28s var(--ease);
}

.page-faq .sym[open] .sym-chev {
  transform: rotate(-135deg);
}

.page-faq .sym-sum:hover .sym-q {
  color: var(--clay);
}

.page-faq .sym-a {
  padding: 0 0 18px;
  font-size: 14px;
  line-height: 1.9;
  color: var(--stone);
  max-width: 44em;
}

.page-faq .sym-a p {
  margin: 0 0 .8em;
}

.page-faq .sym-a p:last-child {
  margin-bottom: 0;
}

.page-faq .sym-a ul {
  margin: 0;
  padding-left: 18px;
}

.page-faq .sym-a li {
  margin-bottom: 6px;
}

.page-faq .sym-a a {
  color: var(--clay);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .sym-a a:hover,
.page-faq .sym-a a:focus-visible {
  color: var(--night);
}

/* ---------- 人工协助 ---------- */

.page-faq .sym-sec--support {
  border-top: 0;
  padding-top: 0;
}

.page-faq .support-panel {
  background: var(--night);
  color: var(--bone);
  padding: clamp(22px, 4vw, 44px);
  border: 1px solid var(--line-mid, rgba(169, 199, 194, .38));
}

.page-faq .sym-title--onDark {
  color: var(--cold);
}

.page-faq .support-panel .index-num {
  color: var(--amber);
}

.page-faq .support-lede {
  margin: 0 0 clamp(18px, 3vw, 26px);
  font-size: 15px;
  line-height: 1.9;
  color: var(--on-dark);
  max-width: 40em;
}

.page-faq .support-contact {
  margin: 0 0 clamp(20px, 3vw, 28px);
  padding: 0;
  border-top: 1px solid var(--faq-line);
}

.page-faq .support-contact .contact-row {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 18px;
  padding: 12px 0;
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .support-contact .contact-key {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--cyan);
  padding-top: 3px;
}

.page-faq .support-contact .contact-val {
  flex: 1 1 16em;
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--cold);
  word-break: break-word;
}

.page-faq .support-sub {
  margin: 0 0 12px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--cold);
}

.page-faq .support-list {
  margin: 0 0 clamp(18px, 3vw, 26px);
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.9;
  color: var(--on-dark);
}

.page-faq .support-list li {
  margin-bottom: 6px;
}

.page-faq .info-code-label {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--amber);
}

.page-faq .info-code {
  margin: 0 0 clamp(20px, 3vw, 28px);
  padding: 12px 14px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--cyan);
  background: rgba(169, 199, 194, .1);
  border: 1px dashed var(--faq-line-strong);
  overflow-x: auto;
  white-space: nowrap;
}

.page-faq .support-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: clamp(18px, 3vw, 24px);
}

.page-faq .support-note {
  margin: 0;
  font-size: 13px;
  line-height: 1.85;
  color: var(--on-dark-dim);
}

.page-faq .support-note a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-faq .faq-lede {
    font-size: 17px;
  }

  .page-faq .support-contact .contact-row {
    flex-wrap: nowrap;
    align-items: baseline;
  }
}

@media (min-width: 780px) {
  .page-faq .steps-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(24px, 4vw, 48px);
  }

  .page-faq .faq-shot {
    max-width: 100%;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-shell {
    grid-template-columns: minmax(0, 1fr) 196px;
    gap: clamp(32px, 5vw, 64px);
  }

  .page-faq .faq-content {
    grid-column: 1;
    grid-row: 1;
  }

  .page-faq .faq-toc {
    grid-column: 2;
    grid-row: 1;
    align-self: start;
    position: sticky;
    top: calc(var(--header-h) + 28px);
    border-bottom: 0;
    border-left: 1px solid var(--faq-line-strong);
    padding: 0 0 0 18px;
  }

  .page-faq .toc-list {
    flex-direction: column;
    overflow: visible;
    gap: 0;
    padding: 0;
  }

  .page-faq .toc-list a {
    padding: 9px 0;
    border: 0;
    border-bottom: 1px solid var(--faq-line);
    border-radius: 0;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: .1em;
    color: var(--stone);
  }

  .page-faq .toc-list li:last-child a {
    border-bottom: 0;
  }

  .page-faq .toc-list a:hover,
  .page-faq .toc-list a:focus-visible {
    background: transparent;
    color: var(--night);
    border-bottom-color: var(--cyan);
  }

  .page-faq .sym-sum {
    padding: 17px 0;
  }

  .page-faq .sym-figure {
    max-width: 520px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .sym-tag,
  .page-faq .sym-chev,
  .page-faq .step-dot {
    transition: none;
  }
}
<<<END>>>