.page-faq {
  --faq-nav-w: 224px;
  --faq-pad: 14px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding-top: var(--sp-4);
  padding-bottom: var(--sp-4);
  border-bottom: 1px solid var(--c-line);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: var(--sp-3);
}

.page-faq .faq-hero h1 {
  font-family: var(--f-head);
  font-size: clamp(34px, 8vw, 68px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  margin: 12px 0 0;
  max-width: 16ch;
}

.page-faq .faq-hero__lede {
  margin: var(--sp-3) 0 0;
  font-size: 17px;
  line-height: 1.7;
  color: rgba(242, 239, 230, 0.78);
  max-width: 46ch;
}

.page-faq .faq-hero__meta {
  list-style: none;
  margin: var(--sp-3) 0 0;
  padding: var(--sp-3) 0 0;
  border-top: 1px solid var(--c-line-soft);
  display: flex;
  flex-wrap: wrap;
  gap: 10px var(--sp-3);
  font-size: 14px;
  color: var(--c-gray);
}

.page-faq .faq-hero__meta .mono {
  color: var(--c-cyan);
  font-size: 13px;
  margin-right: 6px;
}

.page-faq .faq-hero__aside {
  margin: 0;
  position: relative;
}

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

.page-faq .faq-hero__aside::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 62%;
  height: 2px;
  background: linear-gradient(90deg, var(--c-cyan), rgba(53, 224, 214, 0));
}

/* ---------- 骨架：分组导航 + 问答 ---------- */
.page-faq .faq-shell {
  display: grid;
  gap: var(--sp-4);
  padding-top: var(--sp-4);
  padding-bottom: var(--sp-6);
}

.page-faq .faq-nav__title {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-gray);
  margin: 0 0 10px;
}

.page-faq .faq-nav__list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-faq .faq-nav__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  padding: 9px 12px;
  border: 1px solid var(--c-line);
  background: var(--c-deep);
  color: var(--c-bone);
  font-size: 14px;
  text-decoration: none;
  transition: background-color 0.18s ease, border-color 0.18s ease, color 0.18s ease;
}

.page-faq .faq-nav__link .mono {
  font-size: 12px;
  color: var(--c-gray);
}

.page-faq .faq-nav__link:hover,
.page-faq .faq-nav__link:focus-visible {
  border-color: var(--c-cyan);
  color: var(--c-cyan);
  outline: none;
}

.page-faq .faq-nav__link:focus-visible {
  box-shadow: 0 0 0 2px var(--c-cyan);
}

.page-faq .faq-shell:has(#entry:target) .faq-nav__link[href="#entry"],
.page-faq .faq-shell:has(#refresh:target) .faq-nav__link[href="#refresh"],
.page-faq .faq-shell:has(#star:target) .faq-nav__link[href="#star"],
.page-faq .faq-shell:has(#mobile:target) .faq-nav__link[href="#mobile"],
.page-faq .faq-shell:has(#report:target) .faq-nav__link[href="#report"],
.page-faq .faq-shell:has(#tail:target) .faq-nav__link[href="#tail"] {
  background: var(--c-orange);
  border-color: var(--c-orange);
  color: var(--c-deep);
  font-weight: 700;
}

.page-faq .faq-shell:has(#entry:target) .faq-nav__link[href="#entry"] .mono,
.page-faq .faq-shell:has(#refresh:target) .faq-nav__link[href="#refresh"] .mono,
.page-faq .faq-shell:has(#star:target) .faq-nav__link[href="#star"] .mono,
.page-faq .faq-shell:has(#mobile:target) .faq-nav__link[href="#mobile"] .mono,
.page-faq .faq-shell:has(#report:target) .faq-nav__link[href="#report"] .mono,
.page-faq .faq-shell:has(#tail:target) .faq-nav__link[href="#tail"] .mono {
  color: var(--c-deep);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: calc(var(--top-h) + 24px);
}

.page-faq .faq-group__head {
  display: grid;
  gap: 8px;
  margin-bottom: var(--sp-3);
}

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

.page-faq .faq-group__head h2 {
  font-family: var(--f-head);
  font-size: clamp(24px, 5vw, 40px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 0;
}

.page-faq .faq-group__lead {
  margin: 0;
  font-size: 16px;
  line-height: 1.7;
  color: var(--c-gray);
  max-width: 58ch;
}

.page-faq .faq-group__foot {
  margin: var(--sp-3) 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-gray);
  border-left: 2px solid var(--c-moss);
  padding-left: 12px;
  max-width: 66ch;
}

.page-faq .faq-break {
  margin: var(--sp-4) 0;
  padding-top: 14px;
  border-top: 1px solid var(--c-line);
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-gray);
  max-width: 62ch;
}

.page-faq .faq-break::before {
  content: "";
  display: inline-block;
  width: 22px;
  height: 2px;
  background: var(--c-cyan);
  vertical-align: middle;
  margin-right: 10px;
}

/* ---------- 四步排查 ---------- */
.page-faq .faq-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--c-line);
}

.page-faq .faq-step {
  position: relative;
  border-bottom: 1px solid var(--c-line-soft);
  transition: opacity 0.2s ease, background-color 0.2s ease;
}

.page-faq .faq-step:hover {
  background: rgba(242, 239, 230, 0.03);
}

.page-faq .faq-step__input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-faq .faq-step__label {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: var(--sp-3) var(--faq-pad);
  cursor: pointer;
}

.page-faq .faq-step__box {
  flex: 0 0 20px;
  width: 20px;
  height: 20px;
  margin-top: 4px;
  border: 1px solid var(--c-cyan);
  position: relative;
  transition: background-color 0.18s ease;
}

.page-faq .faq-step__input:checked ~ .faq-step__box {
  background: var(--c-cyan);
}

.page-faq .faq-step__input:checked ~ .faq-step__box::after {
  content: "";
  position: absolute;
  left: 6px;
  top: 2px;
  width: 5px;
  height: 10px;
  border-right: 2px solid var(--c-deep);
  border-bottom: 2px solid var(--c-deep);
  transform: rotate(42deg);
}

.page-faq .faq-step__input:focus-visible ~ .faq-step__box {
  box-shadow: 0 0 0 2px var(--c-cyan);
}

.page-faq .faq-step:has(.faq-step__input:checked) {
  opacity: 0.42;
}

.page-faq .faq-step:has(.faq-step__input:checked) .faq-step__title {
  text-decoration: line-through;
  text-decoration-color: var(--c-gray);
}

.page-faq .faq-step__body {
  display: grid;
  gap: 6px;
}

.page-faq .faq-step__title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--f-head);
  font-size: 19px;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.page-faq .faq-step__arrow {
  flex: 0 0 auto;
  color: var(--c-orange);
}

.page-faq .faq-step__no {
  font-size: 13px;
  color: var(--c-gray);
}

.page-faq .faq-step__desc {
  font-size: 15px;
  line-height: 1.7;
  color: var(--c-gray);
  max-width: 62ch;
}

.page-faq .faq-step__judge {
  font-size: 14px;
  line-height: 1.6;
  color: var(--c-bone);
  border-left: 2px solid var(--c-cyan);
  padding-left: 10px;
  max-width: 60ch;
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-list {
  border-top: 1px solid var(--c-line);
}

.page-faq .faq-list--tight {
  margin-top: var(--sp-3);
}

.page-faq .faq-q {
  border-bottom: 1px solid var(--c-line-soft);
  border-left: 2px solid transparent;
  padding-left: var(--faq-pad);
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.page-faq .faq-q[open] {
  border-left-color: var(--c-cyan);
  background: rgba(53, 224, 214, 0.045);
}

.page-faq .faq-q__sum {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 18px var(--faq-pad) 18px 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--f-head);
  font-size: 18px;
  line-height: 1.4;
  letter-spacing: -0.01em;
}

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

.page-faq .faq-q__sum::marker {
  content: "";
}

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

.page-faq .faq-q__sum:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: -2px;
}

.page-faq .faq-q__no {
  flex: 0 0 auto;
  font-size: 12px;
  color: var(--c-gray);
}

.page-faq .faq-q__t {
  flex: 1 1 auto;
  transition: color 0.18s ease;
}

.page-faq .faq-q__mark {
  position: relative;
  flex: 0 0 14px;
  width: 14px;
  height: 14px;
  margin-top: 5px;
}

.page-faq .faq-q__mark::before,
.page-faq .faq-q__mark::after {
  content: "";
  position: absolute;
  background: var(--c-cyan);
}

.page-faq .faq-q__mark::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 1.5px;
}

.page-faq .faq-q__mark::after {
  left: 6px;
  top: 0;
  width: 1.5px;
  height: 14px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.page-faq .faq-q[open] .faq-q__mark::after {
  transform: rotate(90deg);
  opacity: 0;
}

.page-faq .faq-q__a {
  padding: 0 var(--faq-pad) 20px 0;
}

.page-faq .faq-q__a p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-gray);
  max-width: 64ch;
}

.page-faq .faq-q__a a {
  color: var(--c-cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 小屏章节的双栏 ---------- */
.page-faq .faq-split {
  display: grid;
  gap: var(--sp-3);
}

.page-faq .faq-split__fig {
  margin: 0;
  order: -1;
}

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

.page-faq .faq-split__fig .media-frame__cap {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  color: var(--c-gray);
}

/* ---------- 反馈清单与提示块 ---------- */
.page-faq .faq-keys {
  list-style: none;
  margin: 0 0 var(--sp-3);
  padding: 0;
  display: grid;
  gap: 1px;
  border: 1px solid var(--c-line);
  background: var(--c-line-soft);
}

.page-faq .faq-keys li {
  background: var(--c-deep);
  padding: 14px;
  font-size: 14px;
  line-height: 1.65;
  color: var(--c-bone);
}

.page-faq .faq-keys .mono {
  display: block;
  margin-bottom: 5px;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--c-cyan);
}

.page-faq .faq-note {
  margin: 0 0 12px;
  padding: 14px 16px;
  background: rgba(196, 100, 60, 0.16);
  border-left: 3px solid var(--c-clay);
  font-size: 15px;
  line-height: 1.7;
  color: var(--c-bone);
  max-width: 68ch;
}

.page-faq .faq-note--yellow {
  background: rgba(255, 210, 63, 0.1);
  border-left-color: var(--c-yellow);
}

/* ---------- 收尾 ---------- */
.page-faq .faq-tail {
  border: 1px solid var(--c-line);
  background: var(--c-deep);
  padding: var(--sp-4) var(--sp-3);
  display: grid;
  gap: var(--sp-3);
}

.page-faq .faq-tail__copy h2 {
  font-family: var(--f-head);
  font-size: clamp(22px, 4.5vw, 32px);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 8px 0 10px;
}

.page-faq .faq-tail__copy p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-gray);
  max-width: 56ch;
}

.page-faq .faq-tail__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-keys {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding-top: var(--sp-5);
    padding-bottom: var(--sp-5);
  }

  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: end;
    gap: var(--sp-5);
  }

  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 330px);
    align-items: start;
    gap: var(--sp-4);
  }

  .page-faq .faq-split__fig {
    order: 0;
    position: sticky;
    top: calc(var(--top-h) + 24px);
  }

  .page-faq .faq-toggle-rule,
  .page-faq .faq-tail {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    padding: var(--sp-4);
  }

  .page-faq .faq-step__label {
    padding: 26px var(--sp-3);
  }

  .page-faq .faq-q__sum {
    font-size: 19px;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-shell {
    grid-template-columns: var(--faq-nav-w) minmax(0, 1fr);
    gap: var(--sp-5);
    padding-top: var(--sp-5);
  }

  .page-faq .faq-nav {
    position: sticky;
    top: calc(var(--top-h) + 24px);
    align-self: start;
  }

  .page-faq .faq-nav__list {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
    gap: 2px;
  }

  .page-faq .faq-nav__link {
    width: 100%;
    white-space: normal;
    border: 0;
    border-left: 2px solid var(--c-line);
    background: transparent;
    padding: 10px 12px;
  }

  .page-faq .faq-nav__link:hover,
  .page-faq .faq-nav__link:focus-visible {
    border-left-color: var(--c-cyan);
  }

  .page-faq .faq-shell:has(#entry:target) .faq-nav__link[href="#entry"],
  .page-faq .faq-shell:has(#refresh:target) .faq-nav__link[href="#refresh"],
  .page-faq .faq-shell:has(#star:target) .faq-nav__link[href="#star"],
  .page-faq .faq-shell:has(#mobile:target) .faq-nav__link[href="#mobile"],
  .page-faq .faq-shell:has(#report:target) .faq-nav__link[href="#report"],
  .page-faq .faq-shell:has(#tail:target) .faq-nav__link[href="#tail"] {
    border-left-color: var(--c-orange);
    background: var(--c-orange);
  }

  .page-faq .faq-body {
    min-width: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-q__mark::after,
  .page-faq .faq-step,
  .page-faq .faq-step__box,
  .page-faq .faq-q,
  .page-faq .faq-q__t,
  .page-faq .faq-nav__link {
    transition: none;
  }
}