.page-faq {
  --faq-line: rgba(43, 61, 92, 0.55);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  background: var(--ink);
  color: var(--paper);
  padding: calc(var(--header-h) + 44px) 0 40px;
  border-bottom: 4px solid var(--green);
}
.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(90deg, var(--faq-line) 0 1px, transparent 1px 48px),
    repeating-linear-gradient(0deg, var(--faq-line) 0 1px, transparent 1px 48px);
  opacity: 0.55;
  pointer-events: none;
}
.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 46%;
  height: 100%;
  background: linear-gradient(205deg, rgba(23, 117, 76, 0.5), transparent 64%);
  pointer-events: none;
}
.page-faq .faq-hero .wrap {
  position: relative;
  z-index: 1;
}
.page-faq .faq-hero .crumbs {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--stone);
  margin-bottom: 20px;
}
.page-faq .faq-hero .crumbs a {
  color: var(--green-lt);
  text-decoration: none;
}
.page-faq .faq-hero .crumbs a:hover {
  text-decoration: underline;
}
.page-faq .faq-hero__kicker {
  display: inline-block;
  color: var(--green-lt);
  border-left: 4px solid var(--orange);
  padding-left: 10px;
  margin: 0;
}
.page-faq .faq-hero__title {
  font-size: clamp(36px, 9.5vw, 84px);
  font-weight: 900;
  line-height: 0.96;
  letter-spacing: -0.03em;
  margin: 14px 0 20px;
  max-width: 13em;
}
.page-faq .faq-hero__title-mark {
  color: var(--orange);
}
.page-faq .faq-hero__lead {
  max-width: 52ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--data);
  margin: 0;
}
.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 26px;
  margin-top: 28px;
  padding-top: 16px;
  border-top: 1px solid var(--blueprint);
}
.page-faq .faq-hero__meta-item {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--stone);
  font-variant-numeric: tabular-nums;
}
.page-faq .faq-hero__meta-item b {
  color: var(--orange);
  font-size: 18px;
  margin-right: 6px;
}

/* ---------- 通用章节头 ---------- */
.page-faq .section {
  padding: 44px 0;
}
.page-faq .faq-head {
  border-bottom: 3px solid var(--ink);
  padding-bottom: 14px;
  margin-bottom: 26px;
}
.page-faq .faq-head .coord {
  display: inline-block;
  background: var(--ink);
  color: var(--green-lt);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  padding: 3px 8px;
}
.page-faq .faq-head .section-title {
  font-size: clamp(24px, 5.4vw, 40px);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -0.01em;
  margin: 12px 0 8px;
}
.page-faq .faq-head__sub {
  max-width: 62ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-2);
}

/* ---------- 症状入口 ---------- */
.page-faq .symptom-chips {
  list-style: none;
  margin: 0 0 28px;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}
.page-faq .symptom-chip {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) 18px;
  align-items: center;
  gap: 12px;
  padding: 14px;
  background: #ffffff;
  border: 3px solid var(--ink);
  box-shadow: var(--shadow-hard-sm);
  color: var(--ink);
  text-decoration: none;
  transition: transform 0.18s var(--ease), box-shadow 0.18s var(--ease);
}
.page-faq .symptom-chip:hover,
.page-faq .symptom-chip:focus-visible {
  transform: translate(3px, 3px);
  box-shadow: 1px 1px 0 var(--ink);
}
.page-faq .symptom-chip__icon {
  display: block;
  color: var(--green);
}
.page-faq .symptom-chip__text {
  display: block;
  min-width: 0;
}
.page-faq .symptom-chip__name {
  display: block;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.4;
}
.page-faq .symptom-chip__hint {
  display: block;
  margin-top: 2px;
  font-size: 12px;
  line-height: 1.55;
  color: var(--ink-2);
}
.page-faq .symptom-chip__go {
  justify-self: end;
  color: var(--orange);
  font-size: 18px;
  line-height: 1;
}

/* ---------- 三步流程 + 信息图 ---------- */
.page-faq .faq-locate__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}
.page-faq .flow {
  background: var(--ink-2);
  color: var(--paper);
  padding: 22px 20px;
  border-left: 6px solid var(--green);
}
.page-faq .flow-step + .flow-step {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--blueprint);
}
.page-faq .flow-step__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 600;
  line-height: 1;
  color: var(--orange);
}
.page-faq .flow-step__title {
  margin: 8px 0 4px;
  font-size: 16px;
  font-weight: 700;
}
.page-faq .flow-step__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--stone);
}
.page-faq .faq-fig {
  margin: 0;
  background: var(--data);
  border: 3px solid var(--ink);
  box-shadow: var(--shadow-hard-sm);
}
.page-faq .faq-fig img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
.page-faq .faq-fig figcaption {
  padding: 10px 12px;
  border-top: 1px solid var(--stone);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--ink-2);
}

/* ---------- 诊断台布局 ---------- */
.page-faq .faq-answers-section {
  background: var(--paper);
  border-top: 3px solid var(--ink);
}
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}
.page-faq .faq-rail {
  background: var(--ink);
  color: var(--paper);
  padding: 18px 16px;
  border-top: 6px solid var(--orange);
}
.page-faq .faq-rail .label {
  display: block;
  color: var(--green-lt);
  margin: 0 0 12px;
}
.page-faq .faq-rail__list {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
}
.page-faq .faq-rail__link {
  display: flex;
  gap: 10px;
  align-items: baseline;
  padding: 10px 8px 10px 12px;
  border-left: 4px solid var(--blueprint);
  color: var(--data);
  font-size: 14px;
  line-height: 1.45;
  text-decoration: none;
  transition: border-color 0.18s var(--ease), background 0.18s var(--ease), color 0.18s var(--ease);
}
.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  border-left-color: var(--orange);
  background: var(--ink-2);
  color: #ffffff;
}
.page-faq .faq-rail__link .mono {
  color: var(--green-lt);
  font-size: 11px;
  letter-spacing: 0.06em;
}
.page-faq .faq-rail__note {
  margin: 0;
  padding-top: 12px;
  border-top: 1px solid var(--blueprint);
  font-size: 12px;
  line-height: 1.75;
  color: var(--stone);
}
.page-faq .faq-rail__note a {
  color: var(--green-lt);
}

/* ---------- 筛选图例 ---------- */
.page-faq .faq-panel .legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}
.page-faq .legend-btn {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.02em;
  padding: 7px 12px;
  border: 2px solid var(--ink);
  background: var(--data);
  color: var(--ink);
  cursor: pointer;
  transition: background 0.18s var(--ease), color 0.18s var(--ease), border-color 0.18s var(--ease);
}
.page-faq .legend-btn:not([aria-pressed="true"]):hover {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}
.page-faq .legend-btn[aria-pressed="true"] {
  background: var(--green);
  border-color: var(--green);
  color: #ffffff;
}

/* ---------- 答案组 ---------- */
.page-faq .faq-group {
  margin-bottom: 30px;
  scroll-margin-top: calc(var(--header-h) + 20px);
}
.page-faq .faq-group + .faq-group {
  border-top: 3px solid var(--ink);
  padding-top: 26px;
}
.page-faq .faq-group:target {
  box-shadow: -6px 0 0 var(--orange);
  padding-left: 14px;
}
.page-faq .faq-group__head {
  margin-bottom: 16px;
}
.page-faq .faq-group__head .coord {
  display: inline-block;
  background: var(--green);
  color: #ffffff;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  padding: 2px 7px;
}
.page-faq .faq-group__title {
  margin: 10px 0 8px;
  font-size: clamp(22px, 4.4vw, 32px);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -0.01em;
}
.page-faq .faq-group__lead {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-2);
}
.page-faq .faq-group__body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-item {
  background: #ffffff;
  border: 3px solid var(--ink);
  box-shadow: var(--shadow-hard-sm);
  margin-bottom: 12px;
  scroll-margin-top: calc(var(--header-h) + 16px);
}
.page-faq .faq-item:last-child {
  margin-bottom: 0;
}
.page-faq .faq-item summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  cursor: pointer;
  list-style: none;
}
.page-faq .faq-item summary::-webkit-details-marker {
  display: none;
}
.page-faq .faq-item summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--orange);
}
.page-faq .faq-item[open] summary {
  background: var(--data);
  border-bottom: 3px solid var(--ink);
}
.page-faq .faq-item[open] summary::after {
  content: "–";
}
.page-faq .faq-answer {
  padding: 16px;
}
.page-faq .faq-answer > * + * {
  margin-top: 12px;
}
.page-faq .faq-answer p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-2);
}
.page-faq .answer-lead {
  border-left: 4px solid var(--green);
  padding-left: 12px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.55;
  color: var(--ink);
}
.page-faq .faq-answer ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-faq .faq-answer li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-2);
}
.page-faq .faq-answer li + li {
  margin-top: 8px;
}
.page-faq .faq-answer li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 8px;
  height: 8px;
  background: var(--green);
}

/* ---------- 人工处理区 ---------- */
.page-faq .faq-help {
  position: relative;
  overflow: hidden;
  background: var(--ink);
  color: var(--paper);
  padding: 48px 0;
  border-top: 4px solid var(--orange);
}
.page-faq .faq-help::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(90deg, var(--faq-line) 0 1px, transparent 1px 48px),
    repeating-linear-gradient(0deg, var(--faq-line) 0 1px, transparent 1px 48px);
  opacity: 0.4;
  pointer-events: none;
}
.page-faq .faq-help .wrap {
  position: relative;
  z-index: 1;
}
.page-faq .faq-help__kicker {
  display: inline-block;
  color: var(--green-lt);
  border-left: 4px solid var(--orange);
  padding-left: 10px;
  margin: 0;
}
.page-faq .faq-help__title {
  margin: 14px 0 12px;
  font-size: clamp(26px, 5.6vw, 46px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.02em;
}
.page-faq .faq-help__lead {
  margin: 0 0 26px;
  max-width: 56ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--data);
}
.page-faq .faq-help__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}
.page-faq .faq-help__item {
  background: var(--ink-2);
  border: 1px solid var(--blueprint);
  border-left: 4px solid var(--green);
  padding: 16px;
}
.page-faq .faq-help__item h3 {
  margin: 0 0 8px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--green-lt);
}
.page-faq .faq-help__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--stone);
}
.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}
.page-faq .faq-help__actions .btn--ghost {
  border-color: var(--green-lt);
  color: var(--green-lt);
}

/* ---------- 延伸阅读 ---------- */
.page-faq .faq-more {
  padding: 44px 0 56px;
  background: var(--paper);
}
.page-faq .faq-more__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 3px solid var(--ink);
}
.page-faq .faq-more__list li {
  border-bottom: 1px solid var(--stone);
}
.page-faq .faq-more__link {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 6px;
  color: var(--ink);
  text-decoration: none;
  transition: background 0.18s var(--ease), padding-left 0.18s var(--ease);
}
.page-faq .faq-more__link:hover,
.page-faq .faq-more__link:focus-visible {
  background: var(--data);
  padding-left: 14px;
}
.page-faq .faq-more__body {
  display: block;
  min-width: 0;
}
.page-faq .faq-more__name {
  display: block;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
}
.page-faq .faq-more__desc {
  display: block;
  margin-top: 3px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-2);
}
.page-faq .faq-more__go {
  margin-left: auto;
  color: var(--orange);
  font-size: 18px;
  line-height: 1;
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-faq .symptom-chips {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-faq .faq-help__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding: calc(var(--header-h) + 64px) 0 56px;
  }
  .page-faq .section {
    padding: 58px 0;
  }
  .page-faq .symptom-chips {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-faq .faq-locate__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
    gap: 24px;
  }
  .page-faq .answer-lead {
    font-size: 20px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: 250px minmax(0, 1fr);
    align-items: start;
    gap: 34px;
  }
  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--header-h) + 18px);
  }
}

@media (min-width: 1120px) {
  .page-faq .faq-group__body--with-fig {
    grid-template-columns: minmax(0, 1fr) 320px;
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .symptom-chip,
  .page-faq .legend-btn,
  .page-faq .faq-rail__link,
  .page-faq .faq-more__link {
    transition-duration: 0.12s;
  }
  .page-faq .symptom-chip:hover,
  .page-faq .symptom-chip:focus-visible {
    transform: none;
  }
}