.page-faq {
  --faq-line: rgba(31, 78, 112, 0.55);
  --faq-line-strong: rgba(31, 78, 112, 0.95);
  --faq-surface: rgba(8, 34, 56, 0.72);
  --faq-surface-hover: rgba(14, 58, 92, 0.66);
  min-width: 0;
  overflow-wrap: break-word;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: calc(var(--header-h) + clamp(2.5rem, 7vw, 4.5rem)) 0 clamp(2.5rem, 6vw, 4rem);
  background:
    radial-gradient(110% 90% at 88% 6%, rgba(34, 227, 211, 0.14), transparent 62%),
    radial-gradient(70% 70% at 6% 92%, rgba(255, 122, 47, 0.09), transparent 70%),
    linear-gradient(180deg, var(--abyss-900) 0%, var(--abyss-800) 100%);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(to right, var(--faq-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--faq-line) 1px, transparent 1px);
  background-size: 68px 68px;
  opacity: 0.4;
  -webkit-mask-image: radial-gradient(85% 75% at 24% 34%, #000 8%, transparent 78%);
  mask-image: radial-gradient(85% 75% at 24% 34%, #000 8%, transparent 78%);
}

.page-faq .faq-hero .breadcrumb {
  margin-bottom: clamp(1.5rem, 4vw, 2.5rem);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
}

@media (min-width: 960px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    align-items: center;
  }
}

.page-faq .faq-hero__title {
  margin: 0.75rem 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.85rem, 4.6vw, 3.4rem);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--ice);
  max-width: 22ch;
}

.page-faq .faq-hero__lede {
  margin: 1.1rem 0 0;
  max-width: 48ch;
  color: var(--sonar-soft);
  font-size: clamp(0.95rem, 1.5vw, 1.0625rem);
  line-height: 1.8;
}

.page-faq .faq-hero__figure {
  margin: 0;
}

.page-faq .faq-hero__figure .media-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--faq-line-strong);
  border-radius: var(--radius-lg);
  background: var(--tide-700);
  box-shadow: 0 28px 64px -34px rgba(34, 227, 211, 0.55);
}

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

.page-faq .faq-hero__figure .media-frame__caption {
  display: block;
  padding: 0.7rem 1rem 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--steel);
}

.page-faq .faq-hero__stats {
  list-style: none;
  margin: clamp(2rem, 5vw, 3rem) 0 0;
  padding: 1.25rem 0 0;
  border-top: 1px solid var(--faq-line);
  display: flex;
  flex-wrap: wrap;
  gap: clamp(1.25rem, 4vw, 3.25rem);
}

.page-faq .faq-hero__stats .stat {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.35rem;
}

.page-faq .faq-hero__stats .stat__value {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--ice);
}

.page-faq .faq-hero__stats .stat__unit {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--pulse);
}

.page-faq .faq-hero__stats .stat__label {
  flex-basis: 100%;
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  color: var(--steel);
}

/* ---------- 分类抽屉 ---------- */

.page-faq .faq-drawer {
  background: linear-gradient(180deg, var(--abyss-900) 0%, var(--abyss-800) 100%);
}

.page-faq .faq-drawer__head {
  max-width: 58ch;
  margin-bottom: clamp(1.75rem, 4vw, 2.75rem);
}

.page-faq .faq-drawer__intro {
  margin: 0.75rem 0 0;
  color: var(--steel);
  line-height: 1.8;
}

.page-faq .faq-drawer__grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.75rem);
}

@media (min-width: 960px) {
  .page-faq .faq-drawer__grid {
    grid-template-columns: 240px minmax(0, 1fr);
    align-items: start;
  }
}

.page-faq .faq-tabs {
  border: 1px solid var(--faq-line);
  border-radius: var(--radius-lg);
  padding: 1.1rem 1rem;
  background: linear-gradient(165deg, rgba(14, 58, 92, 0.72), rgba(4, 18, 31, 0.5));
}

@media (min-width: 960px) {
  .page-faq .faq-tabs {
    position: sticky;
    top: calc(var(--header-h) + 1.25rem);
  }
}

.page-faq .faq-tabs__label {
  margin: 0 0 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--steel);
}

.page-faq .faq-tabs__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

@media (min-width: 960px) {
  .page-faq .faq-tabs__list {
    flex-direction: column;
    flex-wrap: nowrap;
  }
}

.page-faq .faq-tabs__link {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.55rem 0.9rem;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  background: rgba(4, 18, 31, 0.42);
  color: var(--ice);
  font-size: 0.9375rem;
  text-decoration: none;
  transition: background 0.25s var(--ease), border-color 0.25s var(--ease), color 0.25s var(--ease);
}

.page-faq .faq-tabs__link:hover,
.page-faq .faq-tabs__link:focus-visible {
  border-color: rgba(34, 227, 211, 0.5);
  background: rgba(34, 227, 211, 0.12);
  color: var(--sonar-soft);
}

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

.page-faq .faq-tabs__num {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  color: var(--pulse);
}

/* ---------- 问题分组 ---------- */

.page-faq .faq-group {
  scroll-margin-top: calc(var(--header-h) + 1.5rem);
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(2.25rem, 5vw, 3.5rem);
}

.page-faq .faq-group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 1rem;
  padding-bottom: 0.8rem;
  margin-bottom: 1.1rem;
  border-bottom: 1px solid var(--faq-line-strong);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-editorial);
  font-weight: 600;
  font-size: clamp(1.2rem, 2.2vw, 1.6rem);
  letter-spacing: 0.01em;
  color: var(--ice);
}

.page-faq .faq-group__meta {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--steel);
}

/* ---------- 可展开条目 ---------- */

.page-faq .accordion {
  display: grid;
  gap: 0.55rem;
}

.page-faq .accordion__item {
  position: relative;
  border: 1px solid var(--faq-line);
  border-left: 3px solid var(--blueprint);
  border-radius: var(--radius-md);
  background: var(--faq-surface);
  transition: border-color 0.28s var(--ease), background 0.28s var(--ease);
}

.page-faq .accordion__item:hover {
  border-left-color: var(--sonar-soft);
  background: var(--faq-surface-hover);
}

.page-faq .accordion__item:has([aria-expanded="true"]),
.page-faq .accordion__item:has([aria-expanded="true"]):hover {
  border-left-color: var(--sonar);
  background: linear-gradient(100deg, rgba(34, 227, 211, 0.1), rgba(8, 34, 56, 0.82) 46%);
}

.page-faq .accordion__title {
  margin: 0;
  font: inherit;
}

.page-faq .accordion__trigger {
  width: 100%;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: start;
  gap: 0.85rem;
  padding: 0.95rem 1.05rem;
  background: none;
  border: 0;
  border-radius: var(--radius-md);
  color: var(--ice);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.55;
  text-align: left;
  cursor: pointer;
}

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

.page-faq .accordion__index {
  padding-top: 0.18em;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--steel);
  transition: color 0.28s var(--ease);
}

.page-faq .accordion__item:has([aria-expanded="true"]) .accordion__index {
  color: var(--sonar);
}

.page-faq .accordion__icon {
  position: relative;
  width: 14px;
  height: 14px;
  margin-top: 0.32em;
  flex: none;
}

.page-faq .accordion__icon::before,
.page-faq .accordion__icon::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 1.5px;
  margin-top: -0.75px;
  border-radius: 2px;
  background: var(--sonar-soft);
  transition: transform 0.3s var(--ease), opacity 0.3s var(--ease);
}

.page-faq .accordion__icon::after {
  transform: rotate(90deg);
}

.page-faq .accordion__item:has([aria-expanded="true"]) .accordion__icon::after {
  transform: rotate(0deg);
  opacity: 0;
}

.page-faq .accordion__panel-inner {
  padding: 0 clamp(1.05rem, 3vw, 1.5rem) 1.15rem clamp(2.75rem, 4vw, 3.1rem);
  color: var(--steel);
  font-size: 0.9375rem;
  line-height: 1.8;
}

.page-faq .accordion__panel-inner p {
  margin: 0;
}

.page-faq .accordion__panel-inner a {
  color: var(--sonar);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 记录迁移 ---------- */

.page-faq .faq-migration__inner {
  position: relative;
  overflow: hidden;
  padding: clamp(1.5rem, 4vw, 3rem);
  border: 1px solid var(--faq-line-strong);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(90% 120% at 100% 0%, rgba(34, 227, 211, 0.16), transparent 60%),
    linear-gradient(140deg, var(--tide-700) 0%, var(--abyss-800) 62%, var(--abyss-900) 100%);
}

.page-faq .faq-migration__inner::before {
  content: "";
  position: absolute;
  top: -30%;
  right: -6%;
  width: 34%;
  height: 160%;
  transform: rotate(6deg);
  background: linear-gradient(180deg, rgba(34, 227, 211, 0.14), rgba(34, 227, 211, 0));
  pointer-events: none;
}

.page-faq .faq-migration__grid {
  position: relative;
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.5rem);
}

@media (min-width: 960px) {
  .page-faq .faq-migration__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    align-items: center;
  }
}

.page-faq .faq-migration__text {
  margin: 0.9rem 0 0;
  max-width: 52ch;
  color: var(--sonar-soft);
  line-height: 1.8;
}

.page-faq .faq-migration__text a {
  color: var(--sonar);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-path {
  list-style: none;
  margin: 1.5rem 0 1.75rem;
  padding: 0;
  display: grid;
  gap: 0.6rem;
}

.page-faq .faq-path__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 0.75rem;
  font-size: 0.9375rem;
  color: var(--ice);
}

.page-faq .faq-path__num {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  color: var(--abyss-900);
  background: var(--sonar);
  border-radius: var(--radius-pill);
  padding: 0.2rem 0.55rem;
}

.page-faq .faq-migration__figure {
  margin: 0;
}

.page-faq .faq-migration__figure .media-frame {
  overflow: hidden;
  border: 1px solid var(--faq-line-strong);
  border-radius: var(--radius-md);
  background: var(--abyss-900);
}

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

.page-faq .faq-migration__figure .media-frame__caption {
  display: block;
  padding: 0.7rem 1rem 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--steel);
}

/* ---------- 人工通道 ---------- */

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

.page-faq .faq-contact__head {
  max-width: 58ch;
}

.page-faq .faq-contact__text {
  margin: 0.75rem 0 0;
  color: var(--steel);
  line-height: 1.8;
}

.page-faq .faq-contact__grid {
  display: grid;
  gap: 1rem;
  margin-top: clamp(1.5rem, 4vw, 2rem);
}

@media (min-width: 720px) {
  .page-faq .faq-contact__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-faq .faq-contact__card {
  padding: 1.25rem 1.35rem;
  border: 1px solid var(--faq-line);
  border-radius: var(--radius-md);
  background: var(--faq-surface);
}

.page-faq .faq-contact__key {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--steel);
}

.page-faq .faq-contact__value {
  margin: 0.5rem 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  letter-spacing: -0.01em;
  color: var(--ice);
}

.page-faq .faq-contact__value a {
  color: var(--sonar);
  text-decoration: none;
}

.page-faq .faq-contact__value a:hover,
.page-faq .faq-contact__value a:focus-visible {
  text-decoration: underline;
  text-underline-offset: 4px;
}

.page-faq .faq-contact__note {
  margin: 0.65rem 0 0;
  font-size: 0.875rem;
  line-height: 1.75;
  color: var(--steel);
}

.page-faq .faq-contact__more {
  margin: 1.25rem 0 0;
  font-size: 0.9375rem;
  color: var(--steel);
}

.page-faq .faq-contact__more a {
  color: var(--sonar);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 窄屏与动效收敛 ---------- */

@media (max-width: 600px) {
  .page-faq .faq-hero__title {
    max-width: none;
  }

  .page-faq .accordion__panel-inner {
    padding-inline-start: 2.6rem;
  }

  .page-faq .faq-group__meta {
    margin-left: 0;
    flex-basis: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .accordion__item,
  .page-faq .accordion__index,
  .page-faq .accordion__icon::before,
  .page-faq .accordion__icon::after,
  .page-faq .faq-tabs__link {
    transition: none;
  }
}