.page-faq {
  --surface: var(--ink);
  --faq-rail: 300px;
  background: var(--ink);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding: clamp(2rem, 5vw, 4rem) 0 clamp(2.5rem, 6vw, 5rem);
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(36, 96, 92, .45) 0%, rgba(11, 20, 24, 0) 62%),
    linear-gradient(180deg, var(--ink-green) 0%, var(--ink) 84%);
  border-bottom: 1px solid var(--line-strong);
}

.page-faq .faq-hero__kicker {
  margin: 1.75rem 0 .85rem;
  font-size: .72rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--orange);
}

.page-faq .faq-hero__title {
  margin: 0 0 1.1rem;
  font-weight: 900;
  font-stretch: 87.5%;
  font-size: clamp(2rem, 7.4vw, 4.35rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--paper);
  max-width: 17ch;
}

.page-faq .faq-hero__lead {
  margin: 0;
  max-width: 48ch;
  font-size: clamp(.95rem, 1.5vw, 1.075rem);
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .faq-hero__lead b {
  color: var(--white);
  font-weight: 600;
  box-shadow: inset 0 -0.55em 0 rgba(200, 242, 38, .16);
}

.page-faq .faq-hero__art {
  margin: clamp(1.75rem, 5vw, 2.75rem) 0 0;
}

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

/* ---------- 三件事 ---------- */
.page-faq .faq-triage {
  padding: clamp(2.5rem, 6vw, 4.5rem) 0;
}

.page-faq .faq-triage__list {
  list-style: none;
  margin: clamp(1.5rem, 4vw, 2.5rem) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-strong);
  border: 1px solid var(--line-strong);
}

.page-faq .faq-triage__item {
  background: var(--surface);
  padding: clamp(1.25rem, 3vw, 2rem);
  display: flex;
  flex-direction: column;
  gap: .65rem;
}

.page-faq .faq-triage__num {
  font-size: .68rem;
  letter-spacing: .16em;
  color: var(--orange);
}

.page-faq .faq-triage__label {
  margin: 0;
  font-size: clamp(1.05rem, 1.6vw, 1.2rem);
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: -.01em;
  color: var(--white);
}

.page-faq .faq-triage__text {
  margin: 0;
  font-size: .9rem;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 主排查区 ---------- */
.page-faq .faq-main {
  padding: clamp(2.5rem, 6vw, 4.5rem) 0 clamp(3rem, 7vw, 5.5rem);
}

.page-faq .faq-main__grid {
  margin-top: clamp(1.5rem, 4vw, 2.75rem);
}

/* 左侧症状索引 */
.page-faq .faq-index {
  align-self: start;
}

.page-faq .faq-index__title {
  margin: 0 0 .9rem;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--mono-gray);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

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

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: .85rem;
  padding: .85rem 0;
  text-decoration: none;
  color: var(--mist);
  font-size: .925rem;
  line-height: 1.5;
  transition: color .22s var(--ease), padding-left .22s var(--ease);
}

.page-faq .faq-index__link .mono {
  flex: none;
  font-size: .7rem;
  letter-spacing: .1em;
  color: var(--orange);
  transition: color .22s var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--white);
  padding-left: .5rem;
}

.page-faq .faq-index__link:hover .mono,
.page-faq .faq-index__link:focus-visible .mono {
  color: var(--lime);
}

.page-faq .faq-index__hint {
  margin: 1.1rem 0 0;
  font-size: .8rem;
  line-height: 1.7;
  color: var(--mono-gray);
}

/* 右侧手风琴 */
.page-faq .faq-qa {
  border-top: 1px solid var(--line-strong);
}

.page-faq .qa {
  border-bottom: 1px solid var(--line-strong);
  scroll-margin-top: calc(var(--head-h) + 4rem);
}

.page-faq .qa[open] {
  background: linear-gradient(90deg, rgba(159, 196, 192, .07) 0%, rgba(159, 196, 192, 0) 70%);
}

.page-faq .qa__summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: clamp(.85rem, 2.4vw, 1.5rem);
  padding: clamp(1.1rem, 2.6vw, 1.6rem) clamp(.25rem, 1.4vw, .9rem);
  cursor: pointer;
  list-style: none;
  transition: background .24s var(--ease);
}

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

.page-faq .qa__summary:hover {
  background: rgba(159, 196, 192, .06);
}

.page-faq .qa__summary:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: -2px;
}

.page-faq .qa__num {
  padding-left: .6rem;
  border-left: 2px solid var(--orange);
  font-size: .7rem;
  line-height: 1.15;
  letter-spacing: .12em;
  color: var(--orange);
  transition: color .24s var(--ease), border-color .24s var(--ease);
}

.page-faq .qa[open] .qa__num {
  border-left-color: var(--lime);
  color: var(--lime);
}

.page-faq .qa__q {
  font-size: clamp(1.02rem, 2.4vw, 1.32rem);
  font-weight: 700;
  line-height: 1.38;
  letter-spacing: -.01em;
  color: var(--white);
}

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

.page-faq .qa__chev {
  flex: none;
  width: 11px;
  height: 11px;
  margin-top: -5px;
  border-right: 1.5px solid var(--mist);
  border-bottom: 1.5px solid var(--mist);
  transform: rotate(45deg);
  transition: transform .26s var(--ease), border-color .26s var(--ease);
}

.page-faq .qa[open] .qa__chev {
  transform: rotate(-135deg);
  border-color: var(--lime);
}

.page-faq .qa__body {
  padding: 0 clamp(.25rem, 1.4vw, .9rem) clamp(1.4rem, 3.2vw, 2.1rem) clamp(1.2rem, 3.6vw, 2.6rem);
  color: var(--mist);
  font-size: .925rem;
  line-height: 1.78;
  animation: faq-panel-in .3s var(--ease) both;
}

.page-faq .qa__body p {
  margin: 0 0 1rem;
  max-width: 62ch;
}

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

.page-faq .qa__body strong {
  color: var(--white);
  font-weight: 600;
}

.page-faq .qa__body a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(46, 123, 255, .5);
  transition: color .22s var(--ease), border-color .22s var(--ease);
}

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

.page-faq .qa__steps {
  list-style: none;
  counter-reset: faq-step;
  margin: 1.1rem 0 1.25rem;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-faq .qa__steps li {
  counter-increment: faq-step;
  position: relative;
  padding: .8rem 0 .8rem 3.1rem;
  border-bottom: 1px solid var(--line);
  color: var(--paper);
  max-width: 60ch;
}

.page-faq .qa__steps li::before {
  content: counter(faq-step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: .88rem;
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .06em;
  color: var(--orange);
}

.page-faq .qa__note {
  font-size: .86rem;
  line-height: 1.8;
  color: var(--mono-gray);
}

.page-faq .qa__more a {
  font-size: .88rem;
}

.page-faq .qa__split {
  display: grid;
  gap: 1.5rem;
}

.page-faq .qa__figure {
  margin: 0;
  max-width: 320px;
}

@keyframes faq-panel-in {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: none; }
}

/* ---------- 人工协助 ---------- */
.page-faq .faq-help {
  padding: clamp(2.5rem, 6vw, 4.5rem) 0 clamp(3rem, 7vw, 5rem);
}

.page-faq .faq-help .sec-head__title {
  color: var(--ink);
}

.page-faq .faq-help .sec-head__index {
  color: var(--orange-deep);
}

.page-faq .faq-help .sec-head__lead {
  color: var(--ink-green);
}

.page-faq .faq-help__grid {
  display: grid;
  gap: 1px;
  margin-top: clamp(1.5rem, 4vw, 2.5rem);
  background: rgba(11, 20, 24, .28);
  border: 1px solid rgba(11, 20, 24, .28);
}

.page-faq .faq-help__cell {
  background: var(--paper);
  padding: clamp(1.25rem, 3vw, 2rem);
  display: flex;
  flex-direction: column;
  gap: .5rem;
}

.page-faq .faq-help__label {
  margin: 0;
  font-size: .68rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--teal);
}

.page-faq .faq-help__value {
  margin: 0;
  font-size: clamp(1rem, 1.5vw, 1.1rem);
  font-weight: 700;
  line-height: 1.45;
  color: var(--ink);
  overflow-wrap: anywhere;
}

.page-faq .faq-help__desc {
  margin: 0;
  font-size: .875rem;
  line-height: 1.75;
  color: var(--ink-green);
}

.page-faq .faq-help__prep {
  margin-top: clamp(1.5rem, 4vw, 2.5rem);
  padding-top: clamp(1.25rem, 3vw, 1.75rem);
  border-top: 1px solid rgba(11, 20, 24, .28);
}

.page-faq .faq-help__prep-title {
  margin: 0;
  font-size: .95rem;
  font-weight: 600;
  color: var(--ink);
}

.page-faq .faq-help__list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
  margin: .9rem 0 0;
  padding: 0;
}

.page-faq .faq-help__list li {
  padding: .42rem .85rem;
  font-size: .84rem;
  line-height: 1.4;
  color: var(--ink);
  background: rgba(255, 255, 255, .5);
  border: 1px solid rgba(11, 20, 24, .3);
  border-radius: 2px;
}

.page-faq .faq-help__link {
  margin: 1.25rem 0 0;
}

.page-faq .faq-help__link a {
  color: var(--ink);
  font-size: .9rem;
  font-weight: 600;
  text-decoration: none;
  border-bottom: 2px solid var(--orange);
  padding-bottom: 2px;
  transition: color .22s var(--ease), border-color .22s var(--ease);
}

.page-faq .faq-help__link a:hover,
.page-faq .faq-help__link a:focus-visible {
  color: var(--orange-deep);
  border-bottom-color: var(--orange-deep);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-triage__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 768px) {
  .page-faq .faq-help__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-faq .faq-help__cell:last-child {
    grid-column: 1 / -1;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--head-h) + 2.5rem);
  }
  .page-faq .qa__split {
    grid-template-columns: minmax(0, 1.4fr) minmax(210px, .8fr);
    gap: clamp(1.5rem, 3vw, 2.5rem);
    align-items: start;
  }
  .page-faq .faq-help__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-faq .faq-help__cell:last-child {
    grid-column: auto;
  }
  .page-faq .faq-help__value {
    font-size: 1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa__body {
    animation: none;
  }
  .page-faq .qa__chev,
  .page-faq .qa__num,
  .page-faq .faq-index__link {
    transition: none;
  }
}