.page-faq {
  --faq-gap: clamp(1.5rem, 3vw, 2.75rem);
  --faq-line: rgba(44, 74, 110, .6);
  display: block;
  overflow-x: hidden;
  background: var(--ink-900);
  color: var(--paper);
  font-family: var(--font-body);
  padding-bottom: clamp(2.5rem, 6vw, 5rem);
}

.page-faq [id] {
  scroll-margin-top: 5.5rem;
}

.page-faq .breadcrumbs {
  padding: clamp(.9rem, 2vw, 1.25rem) 0 0;
}

.page-faq .breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .06em;
  color: var(--mist);
}

.page-faq .breadcrumbs__link {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

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

.page-faq .breadcrumbs__sep {
  color: var(--ink-600);
}

.page-faq .breadcrumbs__current {
  color: var(--paper);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  margin-top: clamp(.75rem, 2vw, 1.25rem);
  padding: clamp(1.75rem, 5vw, 3.25rem) 0 clamp(2rem, 6vw, 3.5rem);
  border-top: 2px solid var(--ink-700);
  border-bottom: 2px solid var(--ink-700);
  background:
    repeating-linear-gradient(90deg, rgba(18, 58, 94, .5) 0 1px, transparent 1px 104px),
    radial-gradient(120% 150% at 88% -25%, rgba(255, 106, 42, .22), transparent 58%),
    linear-gradient(165deg, var(--ink-800), var(--ink-900) 72%);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--orange), var(--teal) 55%, transparent 92%);
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__kicker {
  margin: 0 0 clamp(.9rem, 2vw, 1.4rem);
  font-size: .75rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--teal);
}

.page-faq .faq-hero__title {
  margin: 0;
  max-width: 20ch;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(2.1rem, 6.2vw, 4.1rem);
  line-height: 1.06;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-faq .faq-hero__lead {
  margin: clamp(1rem, 2.4vw, 1.5rem) 0 0;
  max-width: 62ch;
  font-size: clamp(.9375rem, 1.6vw, 1.0625rem);
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .faq-search {
  margin-top: clamp(1.5rem, 3.5vw, 2.25rem);
  max-width: 720px;
}

.page-faq .faq-search__label {
  display: block;
  margin-bottom: .6rem;
  font-size: .8125rem;
  letter-spacing: .04em;
  color: var(--orange-soft);
}

.page-faq .faq-search__field {
  display: flex;
  align-items: center;
  padding: .25rem .25rem .25rem 1rem;
  border: 2px solid var(--ink-700);
  border-radius: var(--radius);
  background: rgba(7, 21, 40, .88);
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-search__field:focus-within {
  border-color: var(--link);
  box-shadow: var(--shadow-hard), 0 0 0 3px rgba(76, 155, 232, .3);
}

.page-faq .faq-search__input {
  flex: 1 1 auto;
  min-width: 0;
  border: 0;
  background: transparent;
  padding: .7rem 0;
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--paper);
}

.page-faq .faq-search__input::placeholder {
  color: var(--mist);
  opacity: .85;
}

.page-faq .faq-search__input:focus {
  outline: none;
}

.page-faq .faq-search__hot {
  margin: .9rem 0 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
  font-size: .8125rem;
  color: var(--mist);
}

.page-faq .faq-hot {
  display: inline-block;
  padding: .2rem .6rem;
  border: 1px solid var(--ink-700);
  border-radius: 999px;
  color: var(--paper);
  font-size: .8125rem;
  text-decoration: none;
  transition: border-color .18s var(--ease), color .18s var(--ease), background .18s var(--ease);
}

.page-faq .faq-hot:hover,
.page-faq .faq-hot:focus-visible {
  border-color: var(--teal);
  color: var(--ink-900);
  background: var(--teal);
}

.page-faq .faq-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(1.75rem, 4vw, 2.75rem) 0 0;
  padding: 0;
  list-style: none;
  border: 2px solid var(--ink-700);
  background: var(--ink-600);
}

.page-faq .faq-stat {
  display: grid;
  gap: .25rem;
  padding: 1rem 1.05rem;
  background: var(--ink-900);
}

.page-faq .faq-stat__num {
  font-size: clamp(1.5rem, 3.4vw, 1.9rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--teal);
}

.page-faq .faq-stat__label {
  font-size: .8125rem;
  color: var(--mist);
}

/* ---------- 主体轨道 ---------- */

.page-faq .page-faq__body {
  padding-top: clamp(1.75rem, 4vw, 3rem);
}

.page-faq .layout-rail {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
  align-items: start;
}

.page-faq .faq-rail {
  padding: 1.15rem;
  border: 2px solid var(--ink-700);
  border-radius: var(--radius);
  background: var(--ink-800);
}

.page-faq .faq-rail .doc-rail__title {
  margin: 0;
  font-size: .75rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--orange-soft);
}

.page-faq .faq-rail .doc-rail__list {
  display: grid;
  gap: .15rem;
  margin: .8rem 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-rail .doc-rail__link {
  display: block;
  padding: .55rem .6rem;
  border-left: 2px solid transparent;
  color: var(--mist);
  font-size: .9375rem;
  line-height: 1.5;
  text-decoration: none;
  transition: color .18s var(--ease), border-color .18s var(--ease), background .18s var(--ease);
}

.page-faq .faq-rail .doc-rail__link:hover,
.page-faq .faq-rail .doc-rail__link:focus-visible {
  color: var(--paper);
  border-left-color: var(--orange);
  background: rgba(18, 58, 94, .8);
}

.page-faq .faq-rail__note {
  margin: 1rem 0;
  padding-top: .9rem;
  border-top: 1px solid var(--ink-600);
  font-size: .8125rem;
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .faq-canvas {
  display: grid;
  gap: clamp(2rem, 5vw, 3.5rem);
  min-width: 0;
}

.page-faq .faq-canvas .section + .section {
  padding-top: clamp(2rem, 5vw, 3rem);
  border-top: 1px solid var(--ink-700);
}

.page-faq .faq-canvas .section__label {
  margin: 0 0 .6rem;
  font-size: .75rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--teal);
}

.page-faq .faq-canvas .section__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.4rem, 3vw, 2.1rem);
  line-height: 1.2;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-faq .faq-canvas .section__lead {
  margin: .85rem 0 0;
  max-width: 66ch;
  font-size: .9375rem;
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .media-frame {
  margin-top: clamp(1.25rem, 3vw, 1.75rem);
}

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

/* ---------- 分类 ---------- */

.page-faq .faq-cats {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
  margin: clamp(1.25rem, 3vw, 1.75rem) 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-cat {
  position: relative;
  display: grid;
  gap: .4rem;
  align-content: start;
  overflow: hidden;
  padding: 1.3rem 1.2rem 1.2rem;
  border: 2px solid var(--ink-700);
  background: var(--ink-800);
  box-shadow: 6px 6px 0 rgba(3, 12, 24, .55);
}

.page-faq .faq-cat::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 26px;
  height: 26px;
  background: var(--orange);
  clip-path: polygon(0 0, 100% 0, 100% 100%);
}

.page-faq .faq-cat__num {
  font-size: .75rem;
  letter-spacing: .12em;
  color: var(--teal);
}

.page-faq .faq-cat__name {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--paper);
}

.page-faq .faq-cat__desc {
  margin: 0;
  font-size: .875rem;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 步骤 ---------- */

.page-faq .faq-steps {
  display: grid;
  gap: 1rem;
  margin: clamp(1.25rem, 3vw, 1.75rem) 0 0;
  padding: 0;
  list-style: none;
  counter-reset: faq-step;
}

.page-faq .faq-step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 1rem;
  padding: 1.15rem 1.2rem;
  border-left: 4px solid var(--orange);
  border-top: 1px solid var(--ink-600);
  background: linear-gradient(100deg, rgba(18, 58, 94, .85), rgba(11, 30, 58, .92));
}

.page-faq .faq-step__no {
  font-size: 1.3rem;
  font-weight: 700;
  line-height: 1;
  padding-top: .15rem;
  color: var(--teal);
}

.page-faq .faq-step__title {
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--paper);
}

.page-faq .faq-step__text {
  margin: .45rem 0 0;
  font-size: .9375rem;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .faq-step__copy {
  margin: 1.1rem 0 0;
}

/* ---------- 订阅与更新 ---------- */

.page-faq .faq-points {
  display: grid;
  gap: .85rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-points li {
  position: relative;
  padding-left: 1.35rem;
  font-size: .9375rem;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .faq-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--teal);
}

.page-faq .faq-points strong {
  color: var(--paper);
}

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

/* ---------- 人群对比 ---------- */

.page-faq .faq-crowd {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
  margin-top: clamp(1.25rem, 3vw, 1.75rem);
}

.page-faq .faq-crowd__item {
  display: grid;
  gap: .6rem;
  align-content: start;
  justify-items: start;
  padding: 1.1rem 1.15rem;
  border: 2px solid var(--ink-700);
  background: var(--ink-800);
}

.page-faq .faq-crowd__text {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .faq-crowd__more {
  margin: 1.1rem 0 0;
  font-size: .9375rem;
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .faq-crowd__more a {
  color: var(--link);
  text-decoration: none;
  border-bottom: 1px solid rgba(76, 155, 232, .5);
}

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

/* ---------- 折叠问答 ---------- */

.page-faq .faq-qa {
  display: grid;
  gap: .7rem;
  margin-top: clamp(1.25rem, 3vw, 1.75rem);
}

.page-faq .faq-q {
  border: 2px solid var(--ink-700);
  border-radius: var(--radius);
  background: var(--ink-800);
  transition: border-color .18s var(--ease);
}

.page-faq .faq-q[open] {
  border-color: var(--teal-deep);
}

.page-faq .faq-q .disclosure__summary {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: .6rem;
  padding: 1rem 2.75rem 1rem 1.1rem;
  font-size: .9688rem;
  font-weight: 600;
  line-height: 1.6;
  color: var(--paper);
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-q .disclosure__summary::before {
  content: "";
  flex: none;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--teal);
}

.page-faq .faq-q .disclosure__summary::after {
  content: "+";
  position: absolute;
  right: 1.05rem;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 1.2rem;
  line-height: 1;
  color: var(--orange);
}

.page-faq .faq-q[open] .disclosure__summary::after {
  content: "–";
}

.page-faq .faq-q .disclosure__summary:hover {
  background: rgba(18, 58, 94, .55);
}

.page-faq .faq-q .disclosure__body {
  padding: 0 1.1rem 1.15rem;
  font-size: .9375rem;
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .faq-q .disclosure__body ol {
  display: grid;
  gap: .45rem;
  margin: .4rem 0 .7rem;
  padding-left: 1.15rem;
}

.page-faq .faq-q .disclosure__summary:focus-visible {
  outline: 2px solid var(--link);
  outline-offset: -2px;
}

/* ---------- 联系收束 ---------- */

.page-faq .faq-help {
  padding: clamp(1.4rem, 4vw, 2.25rem);
  border: 2px solid var(--ink-700);
  background:
    radial-gradient(120% 170% at 100% 0%, rgba(34, 211, 182, .16), transparent 62%),
    var(--ink-800);
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-help .section__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.35rem, 3vw, 1.9rem);
  line-height: 1.25;
  color: var(--paper);
}

.page-faq .faq-help__lead {
  margin: .9rem 0 0;
  max-width: 62ch;
  font-size: .9375rem;
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-top: 1.3rem;
}

.page-faq .faq-contact-line {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem .75rem;
  margin: 1.2rem 0 0;
  padding-top: 1rem;
  border-top: 1px solid var(--ink-600);
  font-family: var(--font-mono);
  font-size: .8125rem;
  color: var(--mist);
  word-break: break-all;
}

/* ---------- 断点 ---------- */

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

  .page-faq .faq-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-faq .faq-crowd {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .page-faq .layout-rail {
    grid-template-columns: minmax(196px, 3fr) minmax(0, 9fr);
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 1.25rem;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-hot,
  .page-faq .faq-rail .doc-rail__link,
  .page-faq .faq-q {
    transition: none;
  }
}