.page-faq {
  --faq-gap: clamp(24px, 3.6vw, 56px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding-top: clamp(26px, 5vw, 58px);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
  margin-top: clamp(20px, 3vw, 34px);
}

.page-faq .faq-hero__title {
  margin: 16px 0 0;
  font-size: clamp(29px, 5.6vw, 54px);
  line-height: 1.12;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-faq .faq-hero__title::after {
  content: "";
  display: block;
  width: 76px;
  height: 4px;
  margin-top: 22px;
  background: var(--amber);
}

.page-faq .faq-hero__lede {
  margin: 22px 0 0;
  max-width: 36em;
  font-size: 16px;
  line-height: 1.78;
  color: var(--muted);
}

.page-faq .faq-hero__stats {
  list-style: none;
  margin: 28px 0 0;
  padding: 20px 0 0;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
}

.page-faq .faq-hero__num {
  display: block;
  font-size: 26px;
  line-height: 1;
  font-weight: 700;
  color: var(--amber);
  letter-spacing: 0.04em;
}

.page-faq .faq-hero__lbl {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.55;
  color: var(--index);
}

.page-faq .faq-hero__figure {
  margin: 0;
}

.page-faq .faq-hero__frame {
  position: relative;
  padding: 10px;
  border: 1px solid var(--line);
  background: var(--panel);
}

.page-faq .faq-hero__frame::before,
.page-faq .faq-hero__frame::after {
  content: "";
  position: absolute;
  width: 14px;
  height: 14px;
  border: 1px solid var(--amber);
}

.page-faq .faq-hero__frame::before {
  top: -1px;
  left: -1px;
  border-right: 0;
  border-bottom: 0;
}

.page-faq .faq-hero__frame::after {
  right: -1px;
  bottom: -1px;
  border-top: 0;
  border-left: 0;
}

.page-faq .faq-hero__frame img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 10 / 7;
  filter: saturate(0.92) contrast(1.04);
}

.page-faq .faq-hero__cap {
  margin-top: 12px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--index);
}

@media (min-width: 960px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
    align-items: center;
  }
}

/* ---------- 现象索引刻度条 ---------- */
.page-faq .idxbar {
  position: sticky;
  top: var(--hdr);
  z-index: 5;
  background: var(--panel);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

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

.page-faq .idxbar__item {
  flex: 0 0 auto;
  border-right: 1px solid var(--line);
}

.page-faq .idxbar__item:first-child {
  border-left: 1px solid var(--line);
}

.page-faq .idxbar__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 14px 18px;
  font-size: 14px;
  line-height: 1.4;
  white-space: nowrap;
  text-decoration: none;
  color: var(--muted);
  transition: color 0.2s linear, background-color 0.2s linear;
}

.page-faq .idxbar__link:hover,
.page-faq .idxbar__link:focus-visible {
  color: var(--amber);
  background: var(--panel-2);
}

.page-faq .idxbar__no {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--amber);
}

/* ---------- 排查组 ---------- */
.page-faq .sec-head {
  margin-bottom: 4px;
}

.page-faq .case {
  display: grid;
  gap: 28px;
  margin-top: 26px;
}

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

.page-faq .case__tag {
  display: inline-block;
  margin: 0 0 14px;
  padding: 3px 9px;
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--amber);
  border: 1px solid var(--line);
}

.page-faq .case__sym {
  margin: 0 0 18px;
  font-size: 17px;
  line-height: 1.75;
  color: var(--paper);
}

.page-faq .case__points {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.page-faq .case__points li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.62;
  color: var(--index);
}

.page-faq .case__points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 9px;
  height: 1px;
  background: var(--blue);
}

.page-faq .case__more {
  margin-top: 20px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

.page-faq .case__more summary {
  cursor: pointer;
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--blue);
}

.page-faq .case__more[open] summary {
  color: var(--paper);
}

.page-faq .case__more p {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--index);
}

/* ---------- 编号检查步骤 ---------- */
.page-faq .steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 20px;
}

.page-faq .step {
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
}

.page-faq .step__no {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--amber);
  border: 1px solid var(--line);
  background: var(--panel);
}

.page-faq .step__title {
  margin: 7px 0 6px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--paper);
}

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

@media (min-width: 880px) {
  .page-faq .case {
    grid-template-columns: minmax(0, 0.86fr) minmax(0, 1.14fr);
    gap: 0;
  }

  .page-faq .case__symptom {
    padding-right: var(--faq-gap);
  }

  .page-faq .case__steps {
    position: relative;
    padding-left: var(--faq-gap);
    border-left: 1px solid var(--line);
  }

  .page-faq .case__steps::after {
    content: "";
    position: absolute;
    left: -1px;
    top: 0;
    width: 1px;
    height: 42px;
    background: var(--amber);
  }
}

/* ---------- 人工支持 ---------- */
.page-faq .help-grid {
  display: grid;
  gap: 28px;
  margin-top: 26px;
}

.page-faq .help-fig {
  margin: 0;
  padding: 10px;
  border: 1px solid var(--line);
  background: var(--board);
}

.page-faq .help-fig img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 3 / 2;
}

.page-faq .help-fig figcaption {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--index);
}

.page-faq .help-intro {
  margin: 0 0 20px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}

.page-faq .stampbox {
  position: relative;
  padding: clamp(18px, 3vw, 30px);
  border: 1px solid var(--line);
  background: var(--panel-2);
}

.page-faq .stampbox::after {
  content: "";
  position: absolute;
  inset: 6px;
  border: 1px solid rgba(255, 179, 0, 0.26);
  pointer-events: none;
}

.page-faq .stampbox__row {
  display: grid;
  grid-template-columns: 68px minmax(0, 1fr);
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px dashed var(--line);
}

.page-faq .stampbox__row:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

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

.page-faq .stampbox__k {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--index);
}

.page-faq .stampbox__v {
  font-size: 15px;
  line-height: 1.6;
  color: var(--paper);
  overflow-wrap: anywhere;
}

.page-faq .help-sub {
  margin: 26px 0 0;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--index);
}

.page-faq .prep {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.page-faq .prep li {
  position: relative;
  padding-left: 20px;
  font-size: 14px;
  line-height: 1.66;
  color: var(--muted);
}

.page-faq .prep li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 10px;
  height: 1px;
  background: var(--amber);
}

.page-faq .morelink {
  margin: 24px 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--index);
}

.page-faq .morelink a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(63, 160, 255, 0.34);
}

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

@media (min-width: 900px) {
  .page-faq .help-grid {
    grid-template-columns: minmax(0, 0.88fr) minmax(0, 1.12fr);
    gap: var(--faq-gap);
    align-items: start;
  }
}

/* ---------- 窄屏收尾 ---------- */
@media (max-width: 640px) {
  .page-faq .idxbar {
    position: static;
  }

  .page-faq .faq-hero__stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
  }

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

  .page-faq .step {
    grid-template-columns: 30px minmax(0, 1fr);
    gap: 12px;
  }

  .page-faq .step__no {
    width: 28px;
    height: 28px;
    font-size: 11px;
  }

  .page-faq .stampbox__row {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }
}