.page-faq {
  --faq-line: rgba(195, 202, 206, 0.14);
  --faq-panel: rgba(42, 40, 37, 0.55);
  --faq-focus: var(--ember-500);
}

/* 面包屑 */
.page-faq .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  align-items: center;
  padding-block: 1.25rem 0.25rem;
  font-size: 0.8125rem;
  color: var(--steel-500);
}

.page-faq .breadcrumb__item {
  color: var(--frost-400);
  text-decoration: none;
}

.page-faq .breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin-right: 0.4rem;
  color: var(--char-600);
}

.page-faq .breadcrumb a.breadcrumb__item:hover {
  color: var(--ember-300);
}

/* 首屏：错位色块 + 斜切图片 */
.page-faq .faq-hero {
  position: relative;
  display: grid;
  gap: 1.5rem;
  padding-block: clamp(1.75rem, 5vw, 3.5rem) clamp(1.75rem, 5vw, 3rem);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: -22% -26% auto -26%;
  height: 72%;
  background: linear-gradient(118deg, rgba(228, 88, 30, 0.2), rgba(63, 126, 168, 0.13) 58%, rgba(16, 16, 16, 0) 92%);
  clip-path: polygon(0 0, 100% 0, 64% 100%, 0 74%);
  pointer-events: none;
}

.page-faq .faq-hero__body {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 0.9rem;
  align-content: start;
  min-width: 0;
}

.page-faq .faq-hero__eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ember-300);
}

.page-faq .faq-hero h1 {
  margin: 0;
}

.page-faq .faq-hero .lede {
  margin: 0;
  max-width: 32em;
}

.page-faq .faq-facts {
  margin: 0.5rem 0 0;
  padding-top: 1rem;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem 1.25rem;
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-facts dt {
  font-size: 0.8125rem;
  color: var(--steel-500);
}

.page-faq .faq-facts dd {
  margin: 0.25rem 0 0;
  font-size: 1.25rem;
}

.page-faq .faq-hero__media {
  position: relative;
  z-index: 1;
  margin: 0;
}

.page-faq .faq-hero__media img {
  clip-path: polygon(0 5%, 100% 0, 100% 95%, 5% 100%);
}

/* 主体两栏 */
.page-faq .faq-layout {
  display: grid;
  gap: 2rem;
  padding-block: clamp(1.5rem, 4vw, 2.5rem) 4rem;
}

.page-faq .faq-main {
  display: grid;
  gap: 2.75rem;
  min-width: 0;
}

/* 左侧问题索引 */
.page-faq .faq-index {
  display: grid;
  gap: 0.9rem;
  align-content: start;
  min-width: 0;
}

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

.page-faq .faq-index .caption {
  margin: 0;
  max-width: 30em;
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 0.4rem;
  overflow-x: auto;
  padding-bottom: 0.35rem;
  scrollbar-width: thin;
}

.page-faq .faq-index__list li {
  flex: 0 0 auto;
}

.page-faq .faq-index__list a {
  display: flex;
  gap: 0.6rem;
  align-items: baseline;
  padding: 0.5rem 0.7rem;
  border-bottom: 3px solid var(--char-600);
  color: var(--frost-400);
  font-size: 0.9375rem;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 0.18s var(--ease), background-color 0.18s var(--ease), color 0.18s var(--ease);
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  border-bottom-color: var(--ember-500);
  background: rgba(228, 88, 30, 0.1);
  color: var(--frost-100);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.8125rem;
  color: var(--ember-300);
}

.page-faq .faq-index__note {
  display: grid;
  gap: 0.5rem;
  padding-top: 0.9rem;
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-index__note .caption {
  margin: 0;
}

.page-faq .faq-index__links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.3rem;
}

.page-faq .faq-index__links a {
  color: var(--frost-400);
  font-size: 0.875rem;
  text-decoration: none;
  border-bottom: 1px solid var(--char-600);
  padding-bottom: 1px;
}

.page-faq .faq-index__links a:hover,
.page-faq .faq-index__links a:focus-visible {
  color: var(--ember-300);
  border-bottom-color: var(--ember-500);
}

/* 分类章节 */
.page-faq .faq-cat {
  display: grid;
  gap: 1.1rem;
  scroll-margin-top: calc(var(--sticky-top) + 1rem);
}

.page-faq .faq-cat__head {
  display: grid;
  gap: 0.35rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-cat__head .section__index {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.16em;
  color: var(--ember-500);
}

.page-faq .faq-cat__head h2 {
  margin: 0;
}

.page-faq .faq-cat__head .caption {
  margin: 0;
  max-width: 42em;
}

/* 问答折叠组件 */
.page-faq .qa-list {
  display: grid;
  border-top: 1px solid var(--faq-line);
}

.page-faq .qa {
  border-bottom: 1px solid var(--faq-line);
  scroll-margin-top: calc(var(--sticky-top) + 1rem);
  transition: margin 0.26s var(--ease), background-color 0.26s var(--ease), box-shadow 0.26s var(--ease);
}

.page-faq .qa[open] {
  margin-block: 0.45rem;
  background: var(--faq-panel);
  border-bottom-color: transparent;
  border-radius: var(--radius-s);
  box-shadow: inset 3px 0 0 var(--ember-500);
}

.page-faq .qa__q {
  display: flex;
  gap: 0.8rem;
  align-items: baseline;
  padding: 1.05rem 1rem;
  cursor: pointer;
  list-style: none;
  font-size: 1.0625rem;
  font-weight: 600;
  line-height: 1.55;
  color: var(--frost-100);
}

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

.page-faq .qa__q:focus-visible {
  outline: 2px solid var(--faq-focus);
  outline-offset: 2px;
  border-radius: var(--radius-s);
}

.page-faq .qa__num {
  flex: none;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.8125rem;
  color: var(--ember-300);
}

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

.page-faq .qa__sign {
  position: relative;
  flex: none;
  margin-left: auto;
  width: 1.25rem;
  height: 1.25rem;
  border: 1px solid var(--char-600);
  border-radius: 50%;
  transition: border-color 0.18s var(--ease);
}

.page-faq .qa__q:hover .qa__sign {
  border-color: var(--ember-500);
}

.page-faq .qa__sign::before,
.page-faq .qa__sign::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--ember-500);
  transform: translate(-50%, -50%);
}

.page-faq .qa__sign::before {
  width: 9px;
  height: 1.5px;
}

.page-faq .qa__sign::after {
  width: 1.5px;
  height: 9px;
  transition: transform 0.2s var(--ease), opacity 0.2s var(--ease);
}

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

.page-faq .qa__a {
  display: grid;
  gap: 0.7rem;
  padding: 0 1rem 1.2rem;
  animation: faq-reveal 0.32s var(--ease) both;
}

.page-faq .qa__a p {
  margin: 0;
  max-width: 34em;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--frost-400);
}

.page-faq .qa__a a {
  color: var(--frost-100);
  text-decoration: none;
  border-bottom: 1px solid var(--ember-500);
}

.page-faq .qa__a a:hover,
.page-faq .qa__a a:focus-visible {
  color: var(--ember-300);
}

.page-faq .caliber-pill {
  display: inline-flex;
  align-items: center;
  padding: 0.1em 0.55em;
  border: 1px solid rgba(247, 183, 51, 0.42);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.8125rem;
  color: var(--amber-400);
  white-space: nowrap;
}

/* 信息图与提示块 */
.page-faq .faq-diagram {
  margin: 0.75rem 0 0;
}

.page-faq .faq-tip {
  display: grid;
  gap: 0.4rem;
  padding: 0.9rem 1.1rem;
  border-left: 3px solid var(--data-blue);
  border-radius: 0 var(--radius-s) var(--radius-s) 0;
  background: rgba(63, 126, 168, 0.1);
}

.page-faq .faq-tip .caption {
  margin: 0;
  color: var(--data-blue);
  letter-spacing: 0.1em;
}

.page-faq .faq-tip p {
  margin: 0;
  max-width: 34em;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--frost-400);
}

/* 联系渠道块 */
.page-faq .faq-contact {
  display: grid;
  gap: 1rem;
  margin-top: 0.5rem;
  padding: clamp(1.1rem, 3vw, 1.6rem);
  background: var(--char-800);
  border: 1px solid var(--char-600);
  border-radius: var(--radius-l);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.03);
}

.page-faq .faq-contact__head {
  display: grid;
  gap: 0.35rem;
}

.page-faq .faq-contact__head .caption {
  margin: 0;
  letter-spacing: 0.1em;
  color: var(--steel-500);
}

.page-faq .faq-contact__lede {
  margin: 0;
  max-width: 34em;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--frost-400);
}

.page-faq .faq-contact .contact-list__value {
  word-break: break-word;
}

.page-faq .faq-contact__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  align-items: center;
}

.page-faq .faq-contact .contact-note {
  margin: 0;
}

/* 回到顶部 */
.page-faq .faq-top {
  position: fixed;
  right: clamp(0.75rem, 3vw, 1.5rem);
  bottom: clamp(0.75rem, 3vw, 1.5rem);
  z-index: 30;
  padding: 0.5rem 0.85rem;
  font-size: 0.8125rem;
  color: var(--frost-400);
  background: rgba(26, 25, 23, 0.92);
  border: 1px solid var(--char-600);
  border-radius: 999px;
  text-decoration: none;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-faq .faq-top:hover,
.page-faq .faq-top:focus-visible {
  color: var(--ember-300);
  border-color: var(--ember-500);
}

@keyframes faq-reveal {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 平板及以上 */
@media (min-width: 640px) {
  .page-faq .faq-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .qa__a {
    padding-left: calc(1rem + 2.6rem);
  }
}

/* 桌面两栏 */
@media (min-width: 900px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: end;
    gap: 2.5rem;
  }

  .page-faq .faq-layout {
    grid-template-columns: 280px minmax(0, 1fr);
    gap: 3rem;
  }

  .page-faq .faq-index {
    position: sticky;
    top: var(--sticky-top);
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
    gap: 0.2rem;
  }

  .page-faq .faq-index__list a {
    border-bottom: 0;
    border-left: 3px solid var(--char-600);
  }

  .page-faq .faq-index__list a:hover,
  .page-faq .faq-index__list a:focus-visible {
    border-left-color: var(--ember-500);
    border-bottom-color: transparent;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-layout {
    grid-template-columns: 320px minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .qa__sign::after,
  .page-faq .faq-index__list a,
  .page-faq .faq-top {
    transition: none;
  }

  .page-faq .qa__a {
    animation: none;
  }
}