.page-faq {
  --faq-rule: rgba(26, 20, 16, .14);
  --faq-rule-sea: rgba(168, 237, 244, .22);
  --faq-card: #FFFCF5;
  --faq-card-hi: #FFFFFF;
  position: relative;
  display: block;
  background: var(--paper-100);
  color: var(--ink-900);
  overflow-x: hidden;
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumbs {
  margin: 18px 0 4px;
  font-size: var(--fs-14);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(160deg, var(--sea-900) 0%, var(--sea-700) 100%);
  color: var(--paper-100);
  border-bottom: 1px solid var(--faq-rule-sea);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(168, 237, 244, .07) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(168, 237, 244, .07) 1px, transparent 1px);
  background-size: 64px 64px;
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -80px;
  top: -70px;
  width: 340px;
  height: 340px;
  background: radial-gradient(circle at 50% 50%, rgba(22, 194, 213, .24), transparent 68%);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  padding-top: clamp(28px, 5vw, 64px);
  padding-bottom: clamp(34px, 6vw, 76px);
}

.page-faq .faq-hero__coord {
  margin: 0 0 14px;
  color: var(--cyan-500);
  font-size: var(--fs-12);
  letter-spacing: .18em;
}

.page-faq .faq-hero__title {
  margin: 0;
  max-width: 17em;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.75rem, 5.2vw, 3.125rem);
  line-height: 1.14;
  letter-spacing: -.01em;
  color: var(--paper-100);
}

.page-faq .faq-hero__intro {
  margin: 18px 0 0;
  max-width: 34em;
  font-size: var(--fs-16);
  line-height: 1.8;
  color: rgba(247, 241, 228, .82);
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 30px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  font-size: var(--fs-14);
  color: var(--cyan-200);
}

.page-faq .faq-hero__meta li {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding-left: 12px;
  border-left: 2px solid rgba(22, 194, 213, .5);
}

.page-faq .faq-hero__meta .u-coord {
  color: rgba(168, 237, 244, .6);
  font-size: var(--fs-12);
  letter-spacing: .12em;
}

.page-faq .faq-hero__media {
  margin: 0;
  border: 1px solid var(--faq-rule-sea);
  background: rgba(6, 35, 58, .5);
}

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

/* ---------- 主体布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: clamp(28px, 4vw, 44px);
  padding-top: clamp(32px, 5vw, 64px);
  padding-bottom: clamp(48px, 7vw, 96px);
}

/* ---------- 分组目录 ---------- */
.page-faq .faq-toc__title {
  margin: 0 0 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--faq-rule);
  color: var(--sea-700);
  font-size: var(--fs-12);
  letter-spacing: .2em;
}

.page-faq .faq-toc__list {
  display: grid;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-toc__list a {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  align-items: baseline;
  gap: 8px;
  padding: 9px 10px 9px 12px;
  border-left: 2px solid transparent;
  color: var(--ink-900);
  font-size: var(--fs-14);
  text-decoration: none;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-toc__list a:hover,
.page-faq .faq-toc__list a:focus-visible {
  border-left-color: var(--cyan-500);
  background: rgba(22, 194, 213, .07);
  color: var(--sea-700);
}

.page-faq .faq-toc__coord {
  color: var(--teal-600);
  font-size: var(--fs-12);
  letter-spacing: .08em;
}

.page-faq .faq-toc__note {
  margin: 18px 0 0;
  padding: 10px 12px;
  border: 1px solid var(--faq-rule);
  background: var(--paper-200);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  line-height: 1.6;
  color: var(--sea-700);
  word-break: break-all;
}

/* ---------- 分组 ---------- */
.page-faq .faq-sections {
  min-width: 0;
}

.page-faq .faq-group {
  padding-bottom: clamp(30px, 4vw, 48px);
  scroll-margin-top: 96px;
}

.page-faq .faq-group + .faq-group {
  padding-top: clamp(30px, 4vw, 48px);
  border-top: 1px dashed var(--faq-rule);
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--sea-900);
}

.page-faq .faq-group__head .section-head__coord {
  color: var(--teal-600);
  font-size: var(--fs-14);
  letter-spacing: .1em;
}

.page-faq .faq-group__head .section-head__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  letter-spacing: -.005em;
  color: var(--ink-900);
}

.page-faq .faq-group__intro {
  margin: 16px 0 20px;
  max-width: 40em;
  font-size: var(--fs-16);
  line-height: 1.8;
  color: rgba(26, 20, 16, .72);
}

.page-faq .faq-group__media {
  margin: 20px 0 22px;
  border: 1px solid var(--faq-rule);
  background: var(--paper-200);
}

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

/* ---------- 折叠问答 ---------- */
.page-faq .faq-list {
  display: grid;
  gap: 10px;
}

.page-faq .faq-item {
  border: 1px solid var(--faq-rule);
  background: var(--faq-card);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-item[open] {
  border-color: rgba(201, 162, 39, .55);
  background: var(--faq-card-hi);
  box-shadow: 0 18px 34px -30px rgba(6, 35, 58, .85);
}

.page-faq .faq-item__q {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) 16px;
  align-items: start;
  gap: 12px;
  padding: 15px 16px;
  font-size: var(--fs-16);
  font-weight: 600;
  line-height: 1.6;
  color: var(--ink-900);
  cursor: pointer;
  list-style: none;
  transition: color var(--dur) var(--ease);
}

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

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

.page-faq .faq-item__q:hover {
  color: var(--sea-700);
}

.page-faq .faq-item__q:focus-visible {
  outline: 2px solid var(--cyan-500);
  outline-offset: -2px;
}

.page-faq .faq-item__idx {
  padding-top: 4px;
  color: var(--gold-700);
  font-size: var(--fs-12);
  letter-spacing: .08em;
}

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

.page-faq .faq-item__sign {
  position: relative;
  align-self: center;
  justify-self: end;
  width: 15px;
  height: 15px;
}

.page-faq .faq-item__sign::before,
.page-faq .faq-item__sign::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--teal-600);
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-item__sign::before {
  width: 15px;
  height: 2px;
  transform: translate(-50%, -50%);
}

.page-faq .faq-item__sign::after {
  width: 2px;
  height: 15px;
  transform: translate(-50%, -50%);
}

.page-faq .faq-item[open] .faq-item__sign::after {
  transform: translate(-50%, -50%) scaleY(0);
}

.page-faq .faq-item[open] .faq-item__sign::before {
  background: var(--gold-500);
}

.page-faq .faq-item__a {
  margin: 0 16px 16px;
  padding: 13px 0 0 46px;
  border-top: 1px solid var(--gold-500);
  font-size: var(--fs-16);
  line-height: 1.78;
  color: rgba(26, 20, 16, .82);
}

.page-faq .faq-item__a p {
  margin: 0;
}

.page-faq .faq-item__action {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
  padding-bottom: 2px;
  border-bottom: 1px solid rgba(22, 194, 213, .5);
  color: var(--sea-700);
  font-size: var(--fs-14);
  font-weight: 600;
  text-decoration: none;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-item__action:hover,
.page-faq .faq-item__action:focus-visible {
  color: var(--orange-500);
  border-bottom-color: var(--orange-500);
}

.page-faq .faq-item__arrow {
  font-family: var(--font-mono);
}

/* ---------- 收尾 ---------- */
.page-faq .faq-group--end {
  padding-bottom: 0;
}

.page-faq .faq-endcard {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 4vw, 46px);
  background: linear-gradient(150deg, var(--sea-900) 0%, var(--sea-700) 100%);
  border-left: 4px solid var(--orange-500);
  color: var(--paper-100);
}

.page-faq .faq-endcard::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(168, 237, 244, .06) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(168, 237, 244, .06) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
}

.page-faq .faq-endcard > * {
  position: relative;
}

.page-faq .faq-endcard__coord {
  margin: 0 0 12px;
  color: var(--cyan-500);
  font-size: var(--fs-12);
  letter-spacing: .18em;
}

.page-faq .faq-endcard__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.35rem, 3.4vw, 2rem);
  line-height: 1.26;
  letter-spacing: -.01em;
  color: var(--paper-100);
}

.page-faq .faq-endcard__text {
  margin: 14px 0 0;
  max-width: 40em;
  font-size: var(--fs-16);
  line-height: 1.8;
  color: rgba(247, 241, 228, .82);
}

.page-faq .faq-endcard__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 22px;
  margin-top: 24px;
}

.page-faq .faq-endcard__link {
  padding-bottom: 2px;
  border-bottom: 1px solid rgba(168, 237, 244, .45);
  color: var(--cyan-200);
  font-size: var(--fs-14);
  text-decoration: none;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-endcard__link:hover,
.page-faq .faq-endcard__link:focus-visible {
  color: var(--paper-100);
  border-bottom-color: var(--paper-100);
}

.page-faq .faq-endcard__mail {
  margin: 22px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--faq-rule-sea);
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  color: var(--cyan-200);
  word-break: break-all;
}

/* ---------- 响应式 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: center;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: 218px minmax(0, 1fr);
    column-gap: clamp(36px, 5vw, 72px);
  }

  .page-faq .faq-toc {
    position: sticky;
    top: 96px;
    align-self: start;
  }
}

@media (max-width: 599px) {
  .page-faq .faq-hero__meta {
    gap: 12px 20px;
  }

  .page-faq .faq-item__q {
    grid-template-columns: 26px minmax(0, 1fr) 14px;
    gap: 9px;
    padding: 14px 12px;
  }

  .page-faq .faq-item__a {
    margin: 0 12px 14px;
    padding: 12px 0 0;
  }

  .page-faq .faq-toc__list a {
    grid-template-columns: 38px minmax(0, 1fr);
    padding-left: 10px;
  }
}