.page-faq {
  --faq-wrap: 1080px;
  --faq-gutter: 20px;
  --faq-hair: rgba(110, 133, 128, .26);
  --faq-hair-strong: rgba(110, 133, 128, .5);
  --acc: var(--cyan);

  position: relative;
  overflow-x: hidden;
  background: var(--ink);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
}

.page-faq .faq-wrap {
  width: 100%;
  max-width: var(--faq-wrap);
  margin-inline: auto;
  padding-inline: var(--faq-gutter);
}

/* ---------- 通用排版件 ---------- */

.page-faq .faq-kicker,
.page-faq .faq-overline {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--cyan-soft);
}

.page-faq .faq-h2 {
  margin: 0 0 12px;
  font-family: var(--font-serif);
  font-size: clamp(23px, 5vw, 32px);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -.01em;
  color: var(--text);
}

.page-faq .faq-h2--sm {
  font-size: clamp(20px, 4.4vw, 26px);
}

.page-faq .faq-lead {
  margin: 0 0 28px;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--text-dim);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  padding: 24px 0 40px;
  background: linear-gradient(180deg, #102019 0%, var(--ink) 100%);
  border-bottom: 1px solid var(--faq-hair);
}

.page-faq .crumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 26px;
  padding: 0;
  list-style: none;
  font-size: 13px;
  color: var(--text-dim);
}

.page-faq .crumbs li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--rule);
}

.page-faq .crumbs a {
  color: var(--text-dim);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

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

.page-faq .faq-hero__title {
  margin: 0 0 18px;
  max-width: 22ch;
  font-family: var(--font-serif);
  font-size: clamp(28px, 7.2vw, 48px);
  font-weight: 700;
  line-height: 1.22;
  letter-spacing: -.02em;
  color: var(--text);
}

.page-faq .faq-hero__lede {
  margin: 0 0 32px;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-dim);
}

.page-faq .faq-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  background: var(--faq-hair);
  border: 1px solid var(--faq-hair);
}

.page-faq .faq-hero__facts > div {
  padding: 14px 16px;
  background: var(--pitch);
}

.page-faq .faq-hero__facts dt {
  margin-bottom: 6px;
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--rule);
}

.page-faq .faq-hero__facts dd {
  margin: 0;
  font-size: 15px;
  color: var(--cyan);
}

/* ---------- 通栏视觉 ---------- */

.page-faq .faq-bandfigure {
  position: relative;
  margin: 0;
  overflow: hidden;
  background: var(--pitch);
  border-bottom: 1px solid var(--faq-hair);
}

.page-faq .faq-bandfigure img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 360px;
  object-fit: cover;
  object-position: center 45%;
  filter: grayscale(.3) saturate(.55) contrast(1.08) brightness(.78);
}

.page-faq .faq-bandfigure::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(180deg,
      rgba(11, 21, 18, .38) 0 1px,
      rgba(11, 21, 18, 0) 1px 4px);
}

/* ---------- 症状入口 ---------- */

.page-faq .faq-symptoms {
  padding: 52px 0 44px;
}

.page-faq .faq-symptoms__list {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 1px;
  list-style: none;
  background: var(--faq-hair);
}

.page-faq .faq-sym {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 14px;
  padding: 16px 16px 16px 0;
  background: var(--ink);
  color: var(--text);
  text-decoration: none;
  transition: background var(--dur) var(--ease);
}

.page-faq .faq-sym__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  margin-left: 0;
  background: var(--moss);
  color: var(--cyan);
  font-size: 14px;
  letter-spacing: .04em;
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-sym__txt {
  font-size: 15.5px;
  line-height: 1.6;
}

.page-faq .faq-sym__arrow {
  padding-right: 4px;
  color: var(--rule);
  font-size: 16px;
  transition: color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-faq .faq-sym:hover,
.page-faq .faq-sym:focus-visible {
  background: var(--pitch);
  outline: none;
}

.page-faq .faq-sym:hover .faq-sym__num,
.page-faq .faq-sym:focus-visible .faq-sym__num {
  transform: translateX(3px);
  background: var(--cyan);
  color: var(--ink);
}

.page-faq .faq-sym:hover .faq-sym__arrow,
.page-faq .faq-sym:focus-visible .faq-sym__arrow {
  color: var(--cyan);
  transform: translateX(3px);
}

/* ---------- 口径对照 ---------- */

.page-faq .faq-quick {
  padding: 44px 0;
  background: var(--pitch);
  border-block: 1px solid var(--faq-hair);
}

.page-faq .faq-quick__grid {
  display: grid;
  gap: 28px;
}

.page-faq .faq-quick__figure {
  position: relative;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--faq-hair-strong);
}

.page-faq .faq-quick__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: grayscale(.35) saturate(.6) contrast(1.06) brightness(.8);
}

.page-faq .faq-quick__figure::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(180deg,
      rgba(11, 21, 18, .34) 0 1px,
      rgba(11, 21, 18, 0) 1px 5px);
}

.page-faq .faq-quick__list {
  margin: 0;
  border-top: 1px solid var(--faq-hair);
}

.page-faq .faq-quick__item {
  display: grid;
  gap: 6px;
  padding: 16px 0;
  border-bottom: 1px solid var(--faq-hair);
}

.page-faq .faq-quick__item dt {
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--cyan);
}

.page-faq .faq-quick__item dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-dim);
}

/* ---------- 分组 ---------- */

.page-faq .faq-group {
  padding: 48px 0;
  border-bottom: 1px solid var(--faq-hair);
}

.page-faq .faq-group--orange { --acc: var(--orange); background: var(--ink); }
.page-faq .faq-group--rose   { --acc: var(--rose);   background: var(--pitch); }
.page-faq .faq-group--cyan   { --acc: var(--cyan);   background: var(--ink); }

.page-faq .faq-group__head {
  margin-bottom: 26px;
}

.page-faq .faq-group__num {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--acc);
}

.page-faq .faq-group__title {
  margin: 0 0 12px;
  font-family: var(--font-serif);
  font-size: clamp(22px, 4.8vw, 30px);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -.012em;
  color: var(--text);
}

.page-faq .faq-group__note {
  margin: 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-dim);
}

/* ---------- 折叠条目 ---------- */

.page-faq .faq-group__items {
  position: relative;
  padding-left: 18px;
}

.page-faq .faq-group__items::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: linear-gradient(180deg, var(--acc) 0%, rgba(110, 133, 128, .16) 100%);
}

.page-faq .faq-q {
  position: relative;
  border-bottom: 1px solid var(--faq-hair);
}

.page-faq .faq-q:first-child {
  border-top: 1px solid var(--faq-hair);
}

.page-faq .faq-q__sum {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: start;
  gap: 12px;
  padding: 16px 2px;
  cursor: pointer;
  list-style: none;
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-q__sum::-webkit-details-marker { display: none; }
.page-faq .faq-q__sum::marker { content: ""; }

.page-faq .faq-q__idx {
  padding-top: 3px;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--acc);
}

.page-faq .faq-q__q {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.65;
  color: var(--text);
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-q__sign {
  position: relative;
  flex: 0 0 auto;
  width: 14px;
  height: 14px;
  margin-top: 6px;
}

.page-faq .faq-q__sign::before,
.page-faq .faq-q__sign::after {
  content: "";
  position: absolute;
  background: var(--acc);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.page-faq .faq-q__sign::before { left: 0; top: 6px; width: 14px; height: 2px; }
.page-faq .faq-q__sign::after  { left: 6px; top: 0; width: 2px; height: 14px; }

.page-faq .faq-q[open] .faq-q__sign::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .faq-q__sum:hover .faq-q__q,
.page-faq .faq-q__sum:focus-visible .faq-q__q {
  color: var(--cyan);
}

.page-faq .faq-q__sum:focus-visible {
  outline: 1px dashed var(--cyan);
  outline-offset: 3px;
}

.page-faq .faq-q__a {
  padding: 0 2px 18px;
}

.page-faq .faq-q__a p {
  margin: 0 0 10px;
  max-width: 68ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--text-dim);
}

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

.page-faq .faq-q__a a {
  color: var(--cyan-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(71, 240, 208, .34);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

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

/* ---------- 奶油纸色插页 ---------- */

.page-faq .faq-group--paper {
  --acc: var(--seal);
  background: var(--paper);
  color: var(--paper-text);
}

.page-faq .faq-group--paper .faq-group__title {
  color: var(--paper-text);
}

.page-faq .faq-group--paper .faq-group__note {
  color: var(--paper-dim);
}

.page-faq .faq-group--paper .faq-group__items::before {
  background: linear-gradient(180deg, var(--seal) 0%, rgba(70, 89, 79, .18) 100%);
}

.page-faq .faq-group--paper .faq-q,
.page-faq .faq-group--paper .faq-q:first-child {
  border-color: rgba(70, 89, 79, .22);
}

.page-faq .faq-group--paper .faq-q__q {
  color: var(--paper-text);
}

.page-faq .faq-group--paper .faq-q__a p {
  color: var(--paper-dim);
}

.page-faq .faq-group--paper .faq-q__a a {
  color: var(--seal);
  border-bottom-color: rgba(198, 64, 47, .38);
}

.page-faq .faq-group--paper .faq-q__sum:hover .faq-q__q,
.page-faq .faq-group--paper .faq-q__sum:focus-visible .faq-q__q {
  color: var(--seal);
}

.page-faq .faq-group--paper .faq-q__sum:focus-visible {
  outline-color: var(--seal);
}

/* ---------- 反馈路径 ---------- */

.page-faq .faq-feedback {
  padding: 52px 0 60px;
  background: var(--moss);
  border-top: 1px solid var(--faq-hair-strong);
}

.page-faq .faq-feedback__grid {
  display: grid;
  gap: 1px;
  margin: 0 0 26px;
  background: rgba(168, 245, 230, .18);
  border: 1px solid rgba(168, 245, 230, .18);
}

.page-faq .faq-feedback__cell {
  padding: 16px 18px;
  background: #16302A;
}

.page-faq .faq-feedback__k {
  margin: 0 0 8px;
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--cyan-soft);
}

.page-faq .faq-feedback__v {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.55;
  color: var(--cyan);
  word-break: break-word;
}

.page-faq .faq-feedback__note {
  padding: 20px 18px;
  background: var(--ink);
  border-left: 3px solid var(--cyan);
}

.page-faq .faq-feedback__note-title {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--cyan-soft);
}

.page-faq .faq-feedback__list {
  margin: 0 0 14px;
  padding: 0;
  list-style: none;
  counter-reset: faq-step;
}

.page-faq .faq-feedback__list li {
  position: relative;
  padding: 6px 0 6px 34px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
  counter-increment: faq-step;
}

.page-faq .faq-feedback__list li::before {
  content: "0" counter(faq-step);
  position: absolute;
  left: 0;
  top: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--cyan);
}

.page-faq .faq-feedback__tail {
  margin: 0;
  max-width: 66ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--text-dim);
}

.page-faq .faq-feedback__tail a {
  color: var(--cyan-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(71, 240, 208, .34);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

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

/* ---------- 响应式 ---------- */

@media (min-width: 600px) {
  .page-faq .faq-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (min-width: 768px) {
  .page-faq {
    --faq-gutter: 32px;
  }

  .page-faq .faq-symptoms,
  .page-faq .faq-quick,
  .page-faq .faq-group {
    padding-block: 60px;
  }

  .page-faq .faq-hero {
    padding: 30px 0 52px;
  }

  .page-faq .faq-bandfigure img {
    max-height: 420px;
  }

  .page-faq .faq-quick__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    gap: 36px;
    align-items: start;
  }

  .page-faq .faq-group__items {
    padding-left: 26px;
  }

  .page-faq .faq-q__sum {
    gap: 18px;
    padding: 18px 2px;
  }

  .page-faq .faq-q__a {
    padding-left: 60px;
  }

  .page-faq .faq-feedback {
    padding: 62px 0 72px;
  }
}

@media (min-width: 1024px) {
  .page-faq {
    --faq-gutter: 44px;
  }

  .page-faq .faq-group__head {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 0 40px;
    align-items: start;
    border-top: 1px solid var(--faq-hair);
    padding-top: 22px;
  }

  .page-faq .faq-group--paper .faq-group__head {
    border-top-color: rgba(70, 89, 79, .24);
  }

  .page-faq .faq-group__num {
    grid-column: 1 / -1;
  }

  .page-faq .faq-group__title {
    grid-column: 1;
    margin-bottom: 0;
  }

  .page-faq .faq-group__note {
    grid-column: 2;
    padding-top: 4px;
  }
}