.page-faq {
  --faq-rail: 288px;
  --faq-card: #FFFCF5;
  --faq-ink-soft: #4A4036;
  --faq-rule: rgba(25, 20, 16, 0.16);
  --faq-shadow: 4px 4px 0 rgba(25, 20, 16, 0.14);
  --faq-shadow-ember: 4px 4px 0 rgba(225, 74, 43, 0.22);
  display: block;
  background: var(--ice-deep);
}

/* ============ 首屏 ============ */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(28px, 5vw, 56px) 0 clamp(30px, 5vw, 56px);
  background:
    radial-gradient(120% 90% at 84% -12%, rgba(99, 210, 214, 0.18), transparent 58%),
    radial-gradient(90% 80% at 4% 106%, rgba(225, 74, 43, 0.22), transparent 62%),
    linear-gradient(180deg, var(--ice-deep) 0%, var(--ice-night) 100%);
  color: var(--text-on-dark);
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 14px;
  max-width: 900px;
}

.page-faq .faq-hero .breadcrumb {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.page-faq .faq-hero .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-hero .breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: rgba(159, 178, 198, 0.55);
}

.page-faq .faq-hero .breadcrumb a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid rgba(159, 178, 198, 0.42);
}

.page-faq .faq-hero .breadcrumb a:hover,
.page-faq .faq-hero .breadcrumb a:focus-visible {
  color: var(--crystal);
  border-bottom-color: var(--crystal);
}

.page-faq .faq-hero__title {
  margin: 2px 0 0;
  font-family: var(--font-ui);
  font-weight: 200;
  font-size: clamp(46px, 11vw, 118px);
  line-height: 0.95;
  letter-spacing: -0.03em;
  color: var(--paper);
}

.page-faq .faq-hero__lead {
  margin: 6px 0 0;
  max-width: 62ch;
  font-size: 17px;
  line-height: 1.85;
  color: var(--text-on-dark);
}

.page-faq .faq-hero__facts {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px 34px;
  margin: 16px 0 0;
  padding: 18px 0 0;
  list-style: none;
  border-top: 1px solid rgba(99, 210, 214, 0.26);
}

.page-faq .faq-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: 9px;
}

.page-faq .faq-hero__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 24px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--gold);
}

.page-faq .faq-hero__cap {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-faq .faq-hero__figure {
  position: relative;
  z-index: 1;
  margin-top: clamp(24px, 4vw, 44px);
}

.page-faq .faq-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 2px solid var(--line-dark);
  box-shadow: 8px 8px 0 rgba(99, 210, 214, 0.12);
}

/* ============ 主体 ============ */
.page-faq .faq-main {
  padding: clamp(36px, 6vw, 80px) 0 clamp(46px, 8vw, 96px);
  background: var(--paper);
  color: var(--ink);
}

.page-faq .faq-shell {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
}

/* ---------- 侧栏 ---------- */
.page-faq .faq-rail {
  display: grid;
  gap: 18px;
  align-content: start;
}

.page-faq .faq-index {
  border: 2px solid var(--ink);
  background: var(--paper-old);
  padding: 16px 14px 18px;
  box-shadow: var(--faq-shadow);
}

.page-faq .faq-index__list {
  display: flex;
  gap: 6px;
  margin: 12px 0 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

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

.page-faq .faq-index__list a {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 10px;
  font-size: 14px;
  line-height: 1.4;
  white-space: nowrap;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 3px solid transparent;
  transition: color 180ms ease, border-color 180ms ease, background-color 180ms ease;
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  color: var(--ember);
  border-bottom-color: var(--ember);
  background: rgba(225, 74, 43, 0.07);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--ember-soft);
}

.page-faq .faq-rail__filter {
  border: 2px solid var(--ink);
  background: var(--faq-card);
  padding: 16px 14px 18px;
}

.page-faq .faq-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.page-faq .faq-filter .chip {
  font-family: var(--font-ui);
  font-size: 12px;
  letter-spacing: 0.08em;
  padding: 6px 12px;
  border: 1.5px solid var(--ink);
  border-radius: var(--radius);
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  transition: background-color 180ms ease, color 180ms ease, border-color 180ms ease;
}

.page-faq .faq-filter .chip:hover {
  background: var(--paper-old);
}

.page-faq .faq-filter .chip[aria-pressed="true"] {
  background: var(--ember);
  border-color: var(--ember);
  color: var(--paper);
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-body {
  min-width: 0;
}

.page-faq .faq-group {
  scroll-margin-top: 96px;
  margin-bottom: clamp(38px, 6vw, 66px);
}

.page-faq .faq-group:last-child {
  margin-bottom: 0;
}

.page-faq .faq-group__head {
  border-top: 3px solid var(--ink);
  padding-top: 14px;
  margin-bottom: 20px;
}

.page-faq .faq-group__title {
  margin: 8px 0 10px;
  font-family: var(--font-ui);
  font-size: clamp(26px, 4.4vw, 40px);
  font-weight: 300;
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-faq .faq-group__lead {
  margin: 0;
  max-width: 58ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--faq-ink-soft);
}

.page-faq .faq-group__list {
  display: grid;
  gap: 12px;
}

/* ---------- 折叠条目 ---------- */
.page-faq .faq-item {
  border: 2px solid var(--ink);
  border-radius: var(--radius);
  background: var(--faq-card);
  box-shadow: var(--faq-shadow);
  transition: box-shadow 220ms ease;
}

.page-faq .faq-item[open] {
  box-shadow: var(--faq-shadow-ember);
}

.page-faq .faq-item:hover {
  box-shadow: 6px 6px 0 rgba(225, 74, 43, 0.2);
}

.page-faq .faq-item > summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-ui);
}

.page-faq .faq-item > summary::-webkit-details-marker {
  display: none;
}

.page-faq .faq-item > summary:focus-visible {
  outline: 2px solid var(--ember);
  outline-offset: 2px;
}

.page-faq .faq-num {
  flex: 0 0 auto;
  margin-top: 4px;
  padding: 3px 7px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 11px;
  line-height: 1;
  letter-spacing: 0.08em;
  color: var(--ember);
  border: 1.5px solid currentColor;
  border-radius: 999px;
}

.page-faq .faq-q {
  flex: 1 1 auto;
  font-size: 16px;
  font-weight: 500;
  line-height: 1.6;
  color: var(--ink);
}

.page-faq .faq-item > summary::after {
  content: "+";
  flex: 0 0 auto;
  margin-top: 1px;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1.2;
  color: var(--ember);
  transition: color 200ms ease;
}

.page-faq .faq-item[open] > summary::after {
  content: "−";
  color: var(--ember-soft);
}

.page-faq .faq-a {
  display: grid;
  gap: 10px;
  padding: 0 18px 18px 18px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--faq-ink-soft);
}

.page-faq .faq-a p {
  margin: 0;
  max-width: 66ch;
}

.page-faq .faq-a strong {
  color: var(--ink);
  font-weight: 600;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.01em;
}

.page-faq .faq-a a {
  color: var(--ember);
  text-decoration: none;
  border-bottom: 1px solid rgba(225, 74, 43, 0.42);
  transition: color 160ms ease, border-color 160ms ease;
}

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

/* ---------- 伤病时间轴示意图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 20px;
  padding: 10px;
  border: 2px solid var(--ink);
  background: var(--paper-old);
  box-shadow: var(--faq-shadow);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--faq-rule);
}

.page-faq .faq-figure figcaption {
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--faq-ink-soft);
}

/* ---------- 结尾联络卡 ---------- */
.page-faq .faq-group--support .faq-support-note {
  margin-top: 22px;
  padding: 20px 18px 22px;
  border: 2px solid var(--ink);
  background: var(--paper-old);
  box-shadow: var(--faq-shadow);
}

.page-faq .faq-contact {
  display: grid;
  gap: 12px;
  margin: 14px 0 0;
}

.page-faq .faq-contact div {
  display: grid;
  gap: 3px;
}

.page-faq .faq-contact dt {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--ember);
}

.page-faq .faq-contact dd {
  margin: 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 15px;
  line-height: 1.65;
  color: var(--ink);
  word-break: break-word;
}

.page-faq .faq-support-note__act {
  margin: 18px 0 0;
}

/* ============ 断点 ============ */
@media (min-width: 768px) {
  .page-faq .faq-a {
    padding: 0 22px 20px 62px;
  }

  .page-faq .faq-q {
    font-size: 17px;
  }

  .page-faq .faq-contact {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px 28px;
  }

  .page-faq .faq-contact div:last-child {
    grid-column: 1 / -1;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-shell {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 104px;
    align-self: start;
  }

  .page-faq .faq-index__list {
    display: grid;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-index__list a {
    border-bottom: 0;
    border-left: 3px solid transparent;
    white-space: normal;
  }

  .page-faq .faq-index__list a:hover,
  .page-faq .faq-index__list a:focus-visible {
    border-left-color: var(--ember);
    border-bottom-color: transparent;
  }
}

@media (min-width: 1280px) {
  .page-faq .faq-group__list {
    gap: 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-item > summary::after,
  .page-faq .faq-index__list a,
  .page-faq .faq-filter .chip,
  .page-faq .faq-a a {
    transition: none;
  }
}