.page-faq {
  --faq-rule: 1px solid var(--line-ink);
  --faq-rule-soft: 1px solid var(--line-ink-soft);
  background: var(--paper);
  color: var(--ink);
}

.page-faq .breadcrumb {
  padding: 18px 0 0;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: 18px 0 40px;
  background: var(--paper);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: linear-gradient(
    90deg,
    var(--cinnabar) 0 26%,
    var(--gold) 26% 30%,
    var(--line-ink-soft) 30% 100%
  );
}

.page-faq .faq-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  align-items: end;
}

.page-faq .faq-h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 7vw, 52px);
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--ink);
  max-width: 17ch;
}

.page-faq .faq-hero-lead {
  margin: 18px 0 0;
  max-width: 46ch;
  font-size: 17px;
  line-height: 1.85;
  color: var(--ink);
}

.page-faq .faq-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-faq .faq-aside-title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--stone);
}

.page-faq .faq-jump {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: var(--faq-rule);
}

.page-faq .faq-jump li {
  border-bottom: var(--faq-rule-soft);
}

.page-faq .faq-jump a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 11px 2px;
  color: var(--ink);
  text-decoration: none;
  font-size: 15px;
  line-height: 1.5;
  transition: color 160ms var(--ease), padding-left 160ms var(--ease);
}

.page-faq .faq-jump a:hover,
.page-faq .faq-jump a:focus-visible {
  color: var(--cinnabar);
  padding-left: 6px;
}

.page-faq .faq-jump .mono-num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--gold);
}

/* ---------- 通用章节 ---------- */
.page-faq .faq-section {
  padding: 46px 0;
}

.page-faq .faq-section--tint {
  background: var(--paper-card);
  border-top: var(--faq-rule-soft);
  border-bottom: var(--faq-rule-soft);
}

.page-faq .faq-h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(25px, 4.4vw, 38px);
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-faq .faq-intro {
  margin: 14px 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--stone);
}

.page-faq .faq-intro a,
.page-faq .section-lead a {
  color: var(--cinnabar);
  text-decoration: none;
  border-bottom: 1px solid var(--line-gold);
}

.page-faq .faq-intro a:hover,
.page-faq .section-lead a:hover {
  border-bottom-color: var(--cinnabar);
}

/* ---------- 三步定位 ---------- */
.page-faq .faq-locate {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
}

.page-faq .locate-track {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  position: relative;
}

.page-faq .locate-track::before {
  content: "";
  position: absolute;
  left: 17px;
  top: 10px;
  bottom: 14px;
  width: 1px;
  background: var(--line-gold);
}

.page-faq .locate-step {
  position: relative;
  padding: 0 0 26px 56px;
}

.page-faq .locate-step:last-child {
  padding-bottom: 0;
}

.page-faq .locate-num {
  position: absolute;
  left: 0;
  top: 0;
  display: grid;
  place-items: center;
  width: 35px;
  height: 35px;
  background: var(--paper);
  border: 1px solid var(--line-gold);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--cinnabar);
}

.page-faq .faq-section--tint .locate-num {
  background: var(--paper-card);
}

.page-faq .locate-step h3 {
  margin: 0 0 6px;
  color: var(--ink);
}

.page-faq .locate-step p {
  margin: 0 0 8px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

.page-faq .locate-step p a {
  color: var(--cinnabar);
  text-decoration: none;
  border-bottom: 1px solid var(--line-gold);
}

.page-faq .locate-crit {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px;
  padding: 8px 10px;
  background: rgba(63, 133, 116, 0.08);
  border-left: 2px solid var(--celadon);
  color: var(--stone) !important;
  font-size: 14px !important;
}

.page-faq .locate-crit-key {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--celadon);
}

.page-faq .faq-figure {
  margin: 0;
  border: 1px solid var(--line-gold);
  background: var(--paper-card);
  overflow: hidden;
}

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

.page-faq .faq-figure .media-caption {
  display: block;
  padding: 10px 12px;
  border-top: 1px solid var(--line-gold-soft);
  font-size: 12px;
  color: var(--stone);
}

/* ---------- 九类现象 ---------- */
.page-faq .symptom-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0 34px;
  margin-top: 26px;
}

.page-faq .symptom {
  border-bottom: var(--faq-rule);
}

.page-faq .symptom-head {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr) 20px;
  gap: 12px;
  align-items: center;
  padding: 13px 0;
  list-style: none;
  cursor: pointer;
}

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

.page-faq .symptom-head:hover .symptom-title {
  color: var(--cinnabar);
}

.page-faq .symptom-num {
  display: grid;
  place-items: center;
  width: 44px;
  height: 32px;
  background: var(--paper-card);
  border: 1px solid var(--line-gold);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--cinnabar);
  transition: background 180ms var(--ease), color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-faq .symptom[open] .symptom-num {
  background: var(--celadon);
  border-color: var(--celadon);
  color: var(--paper-card);
}

.page-faq .symptom-title {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 16px;
  line-height: 1.5;
  color: var(--ink);
  transition: color 160ms var(--ease);
}

.page-faq .symptom-mark {
  justify-self: end;
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1;
  color: var(--gold);
}

.page-faq .symptom-mark::before {
  content: "+";
}

.page-faq .symptom[open] .symptom-mark::before {
  content: "\2212";
  color: var(--celadon);
}

.page-faq .symptom-steps {
  list-style: none;
  margin: 0 0 18px 20px;
  padding: 0 0 0 22px;
  border-left: 1px solid var(--line-gold-soft);
}

.page-faq .step-check {
  display: grid;
  grid-template-columns: 16px 24px minmax(0, 1fr);
  gap: 8px;
  align-items: start;
  padding: 7px 0;
  cursor: pointer;
}

.page-faq .step-box {
  width: 16px;
  height: 16px;
  margin: 5px 0 0;
  accent-color: var(--celadon);
  cursor: pointer;
}

.page-faq .step-box:focus-visible {
  outline: 2px solid var(--cinnabar);
  outline-offset: 2px;
}

.page-faq .step-idx {
  padding-top: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--gold);
}

.page-faq .step-text {
  font-size: 15px;
  line-height: 1.72;
  color: var(--ink);
  transition: color 160ms var(--ease);
}

.page-faq .step-box:checked ~ .step-idx {
  color: var(--stone);
}

.page-faq .step-box:checked ~ .step-text {
  color: var(--stone);
  text-decoration: line-through;
  text-decoration-color: rgba(107, 122, 126, 0.6);
}

/* ---------- 显示适配（深色停顿） ---------- */
.page-faq .faq-display {
  position: relative;
  padding: 46px 0;
  background: var(--ink);
  color: var(--on-dark);
}

.page-faq .faq-display::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: var(--gold);
}

.page-faq .faq-display-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
  align-items: start;
}

.page-faq .faq-h2-display {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 4.2vw, 36px);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-display-lead {
  margin: 14px 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--on-dark);
  max-width: 44ch;
}

.page-faq .faq-display-sub {
  margin: 24px 0 8px;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--gold-light);
}

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

.page-faq .display-list li {
  position: relative;
  padding: 9px 0 9px 20px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--on-dark);
  border-bottom: 1px solid var(--line-gold-soft);
}

.page-faq .display-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 17px;
  width: 7px;
  height: 7px;
}

.page-faq .display-list--ok li::before {
  background: var(--celadon-soft);
}

.page-faq .display-list--alert li::before {
  background: var(--lantern);
}

.page-faq .faq-display-note {
  margin: 22px 0 20px;
  padding-left: 14px;
  border-left: 2px solid var(--gold);
  font-size: 15px;
  line-height: 1.8;
  color: var(--on-dark);
}

.page-faq .faq-figure--dark {
  border-color: var(--line-gold-soft);
  background: var(--indigo);
}

.page-faq .faq-figure--dark .media-caption {
  border-top-color: var(--line-gold-soft);
  color: var(--on-dark-dim);
}

/* ---------- 问答索引 ---------- */
.page-faq .qa-filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 12px;
  padding: 14px 0;
  border-top: var(--faq-rule);
  border-bottom: var(--faq-rule);
}

.page-faq .qa-filter-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--stone);
}

.page-faq .qa-filter-btns {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .qa-filter-btn {
  font-family: inherit;
  font-size: 14px;
  line-height: 1;
  padding: 8px 15px;
  border: 1px solid var(--line-ink);
  border-radius: 2px;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  transition: background 160ms var(--ease), color 160ms var(--ease), border-color 160ms var(--ease);
}

.page-faq .qa-filter-btn:hover {
  border-color: var(--cinnabar);
  color: var(--cinnabar);
}

.page-faq .qa-filter-btn[aria-pressed="true"] {
  background: var(--cinnabar);
  border-color: var(--cinnabar);
  color: var(--paper-card);
}

.page-faq .qa-count {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--stone);
}

.page-faq .qa-columns {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  margin-top: 28px;
}

.page-faq .qa-col {
  border-top: 3px solid var(--gold);
  padding-top: 12px;
  min-width: 0;
}

.page-faq .qa-col:nth-child(1) { border-top-color: var(--cinnabar); }
.page-faq .qa-col:nth-child(2) { border-top-color: var(--ink); }
.page-faq .qa-col:nth-child(3) { border-top-color: var(--celadon); }
.page-faq .qa-col:nth-child(4) { border-top-color: var(--lantern); }

.page-faq .qa-col-head {
  margin: 0 0 4px;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 16px;
  color: var(--ink);
}

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

.page-faq .qa-item {
  padding: 12px 0;
  border-bottom: var(--faq-rule-soft);
}

.page-faq .qa-q {
  margin: 0 0 4px;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.55;
  color: var(--ink);
}

.page-faq .qa-a {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--stone);
}

.page-faq .qa-empty {
  margin: 22px 0 0;
  padding: 14px 16px;
  border-left: 2px solid var(--lantern);
  background: rgba(210, 118, 74, 0.08);
  font-size: 15px;
  color: var(--stone);
}

/* ---------- 提交清单 ---------- */
.page-faq .escalate {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
}

.page-faq .escalate-left .btn {
  margin-top: 20px;
}

.page-faq .escalate-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: var(--faq-rule);
}

.page-faq .escalate-list li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  padding: 12px 0;
  border-bottom: var(--faq-rule-soft);
}

.page-faq .escalate-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--gold);
  padding-top: 4px;
}

.page-faq .escalate-text {
  font-size: 15px;
  line-height: 1.72;
  color: var(--ink);
}

.page-faq .escalate-text b {
  font-weight: 700;
}

.page-faq .escalate-contact {
  margin-top: 24px;
  padding: 18px 20px;
  background: var(--paper);
  border-left: 3px solid var(--gold);
}

.page-faq .escalate-contact-lead {
  margin: 0 0 12px;
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}

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

.page-faq .escalate-channels li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  padding: 7px 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--stone);
}

.page-faq .escalate-channels a {
  color: var(--cinnabar);
  text-decoration: none;
  border-bottom: 1px solid var(--line-gold);
}

.page-faq .channel-key {
  flex: 0 0 auto;
  min-width: 62px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--ink);
  padding: 2px 6px;
  border: 1px solid var(--line-ink);
}

/* ---------- 平板 ---------- */
@media (min-width: 680px) {
  .page-faq .faq-hero {
    padding: 24px 0 48px;
  }

  .page-faq .faq-section {
    padding: 56px 0;
  }

  .page-faq .faq-display {
    padding: 56px 0;
  }

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

  .page-faq .qa-columns {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 32px 28px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding: 28px 0 56px;
  }

  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 56px;
  }

  .page-faq .faq-section {
    padding: 72px 0;
  }

  .page-faq .faq-display {
    padding: 76px 0;
  }

  .page-faq .faq-locate {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 52px;
    align-items: start;
  }

  .page-faq .locate-track {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 26px;
    margin-top: 32px;
  }

  .page-faq .locate-track::before {
    left: 0;
    right: 0;
    top: 17px;
    bottom: auto;
    width: auto;
    height: 1px;
  }

  .page-faq .locate-step {
    padding: 0;
  }

  .page-faq .locate-num {
    position: static;
    margin-bottom: 14px;
  }

  .page-faq .faq-display-grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: 52px;
    align-items: center;
  }

  .page-faq .escalate {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 52px;
    align-items: start;
  }
}

@media (min-width: 1060px) {
  .page-faq .qa-columns {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .symptom-grid {
    gap: 0 48px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-jump a,
  .page-faq .symptom-num,
  .page-faq .symptom-title,
  .page-faq .qa-filter-btn,
  .page-faq .step-text {
    transition-duration: 1ms;
  }
}
<<<END>>>