.page-faq {
  --faq-rail: 258px;
  --faq-gap: clamp(18px, 3.4vw, 44px);
  --faq-cyan-soft: rgba(39, 245, 211, 0.10);
  --faq-violet-soft: rgba(139, 92, 246, 0.16);
  color: var(--paper);
  background:
    radial-gradient(85% 46% at 100% 0%, var(--faq-violet-soft), transparent 62%),
    var(--void);
  padding-bottom: clamp(52px, 8vw, 104px);
}

.page-faq .page-faq__bar {
  padding-top: clamp(14px, 2.4vw, 22px);
}

/* 面包屑 */
.page-faq .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--steel);
}

.page-faq .breadcrumb__link {
  color: var(--steel);
  text-decoration: none;
  transition: color 160ms var(--ease);
}

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

.page-faq .breadcrumb__sep {
  color: var(--hair);
}

.page-faq .breadcrumb__current {
  color: var(--cyan);
}

/* 首屏 */
.page-faq .faq-hero {
  position: relative;
  padding-block: clamp(20px, 3.6vw, 42px) clamp(28px, 4.6vw, 54px);
}

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

.page-faq h1.display {
  margin: 10px 0 0;
  max-width: 16ch;
  line-height: 1.02;
}

.page-faq .faq-hero__mark {
  position: relative;
  display: inline-block;
  color: var(--cyan);
  font-style: normal;
  white-space: nowrap;
}

.page-faq .faq-hero__mark::after {
  content: "";
  position: absolute;
  inset: auto 0 -0.08em 0;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan), var(--violet));
  opacity: 0.7;
}

.page-faq .faq-hero__lede {
  margin: clamp(16px, 2.2vw, 22px) 0 0;
  max-width: 60ch;
  font-family: var(--font-body);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.78;
  color: var(--steel);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 30px);
}

.page-faq .faq-hero__figure {
  position: relative;
  margin: 0;
  padding: 8px;
  border: 1px solid var(--hair);
  background: var(--booth);
  box-shadow: 0 18px 40px -28px rgba(0, 0, 0, 0.9);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 40px), calc(100% - 40px) 100%, 0 100%);
}

.page-faq .faq-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-faq .faq-hero__figure figcaption {
  padding: 9px 4px 3px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--steel);
}

/* 三条短路径 */
.page-faq .faq-paths {
  padding-bottom: clamp(38px, 6vw, 74px);
}

.page-faq .faq-paths__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 24px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--hair);
}

.page-faq .faq-paths__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2.2vw, 1.6rem);
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-faq .faq-paths__note {
  margin: 0;
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1.6;
  color: var(--steel);
}

.page-faq .pathmap {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: clamp(18px, 3vw, 28px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--hair);
  border: 1px solid var(--hair);
}

.page-faq .pathmap__node {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(20px, 3vw, 30px) clamp(18px, 2.4vw, 26px);
  background: var(--booth);
  transition: background-color 180ms var(--ease);
}

.page-faq .pathmap__node::after {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), rgba(39, 245, 211, 0) 78%);
  opacity: 0;
  transition: opacity 180ms var(--ease);
}

.page-faq .pathmap__node:hover,
.page-faq .pathmap__node:focus-within {
  background: #121821;
}

.page-faq .pathmap__node:hover::after,
.page-faq .pathmap__node:focus-within::after {
  opacity: 1;
}

.page-faq .pathmap__index {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--violet);
}

.page-faq .pathmap__name {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 1.8vw, 1.35rem);
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-faq .pathmap__text {
  flex: 1;
  margin: 0;
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.74;
  color: var(--steel);
}

.page-faq .pathmap__go {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 4px;
  padding-top: 12px;
  border-top: 1px solid var(--hair);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--cyan);
  text-decoration: none;
  transition: color 160ms var(--ease), gap 160ms var(--ease);
}

.page-faq .pathmap__go:hover,
.page-faq .pathmap__go:focus-visible {
  color: var(--mint);
  gap: 14px;
}

/* 问答面板 */
.page-faq .faq-board {
  padding-block: clamp(34px, 5.4vw, 68px) 0;
  border-top: 1px solid var(--hair);
  background: linear-gradient(180deg, rgba(15, 20, 28, 0.72), rgba(7, 10, 15, 0) 46%);
}

.page-faq .faq-board__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 4vw, 44px);
  align-items: start;
}

.page-faq .faq-index {
  padding: clamp(18px, 2.6vw, 24px);
  border: 1px solid var(--hair);
  background: var(--booth);
}

.page-faq .faq-index__title {
  margin: 8px 0 16px;
  font-family: var(--font-display);
  font-size: 1.12rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-faq .faq-index__list {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--hair);
  border-block: 1px solid var(--hair);
}

.page-faq .faq-index__link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 10px;
  background: var(--booth);
  color: var(--paper);
  text-decoration: none;
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.5;
  transition: background-color 160ms var(--ease), color 160ms var(--ease), padding-left 160ms var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  background: var(--faq-cyan-soft);
  color: var(--cyan);
  padding-left: 16px;
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--violet);
}

.page-faq .faq-index__tip {
  margin: 14px 0 0;
  font-family: var(--font-body);
  font-size: 12px;
  line-height: 1.66;
  color: var(--steel);
}

.page-faq .faq-body {
  display: grid;
  gap: clamp(30px, 4.6vw, 54px);
}

.page-faq .faq-group {
  scroll-margin-top: 132px;
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--hair);
}

.page-faq .faq-group__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--orange);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 2.6vw, 1.85rem);
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-faq .faq-list {
  display: grid;
  gap: 1px;
  margin-top: 1px;
  background: var(--hair);
}

.page-faq .faq-item {
  background: var(--booth);
  border-left: 2px solid transparent;
  transition: background-color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-faq .faq-item:hover {
  background: #121821;
}

.page-faq .faq-item:has(.faq-item__trigger[aria-expanded="true"]) {
  border-left-color: rgba(255, 122, 26, 0.85);
}

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

.page-faq .faq-item__trigger {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  width: 100%;
  padding: 17px clamp(14px, 2.2vw, 22px);
  border: 0;
  background: none;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}

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

.page-faq .faq-item__q {
  flex: 1;
  font-family: var(--font-body);
  font-size: clamp(15px, 1.6vw, 16px);
  font-weight: 500;
  line-height: 1.62;
  color: var(--paper);
}

.page-faq .faq-item__icon {
  position: relative;
  flex: none;
  width: 16px;
  height: 16px;
  margin-top: 4px;
}

.page-faq .faq-item__icon::before,
.page-faq .faq-item__icon::after {
  content: "";
  position: absolute;
  inset: 50% 0 auto 0;
  height: 1px;
  background: var(--cyan);
  transition: transform 180ms var(--ease), opacity 180ms var(--ease);
}

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

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

.page-faq .faq-item__panel {
  padding: 0 clamp(14px, 2.2vw, 22px) 20px;
}

.page-faq .faq-item__panel p {
  margin: 0;
  max-width: 70ch;
  font-family: var(--font-body);
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--steel);
}

.page-faq .faq-inline-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  transition: color 160ms var(--ease);
}

.page-faq .faq-inline-link:hover,
.page-faq .faq-inline-link:focus-visible {
  color: var(--mint);
}

/* 章节配图 */
.page-faq .faq-figure {
  margin: clamp(20px, 3vw, 26px) 0 0;
  padding: 8px;
  border: 1px solid var(--hair);
  background: var(--booth);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.page-faq .faq-figure figcaption {
  padding: 9px 4px 3px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--steel);
}

/* 联系方式板 */
.page-faq .faq-contact {
  display: grid;
  gap: 14px;
  margin-top: clamp(20px, 3vw, 28px);
  padding: clamp(20px, 3vw, 28px);
  border: 1px solid var(--hair);
  background:
    linear-gradient(135deg, rgba(39, 245, 211, 0.09), rgba(139, 92, 246, 0.06) 46%, rgba(15, 20, 28, 0) 72%),
    var(--booth);
}

.page-faq .faq-contact__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--hair);
}

.page-faq .faq-contact__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-faq .faq-contact__value {
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.62;
  color: var(--paper);
  word-break: break-word;
}

.page-faq .faq-contact__note {
  margin: 0;
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1.72;
  color: var(--steel);
}

.page-faq .faq-contact .btn {
  justify-self: start;
}

/* 平板与桌面 */
@media (min-width: 620px) {
  .page-faq .faq-contact__row {
    grid-template-columns: 108px minmax(0, 1fr);
    gap: 16px;
    align-items: baseline;
  }
}

@media (min-width: 780px) {
  .page-faq .pathmap {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 920px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: end;
  }

  .page-faq .faq-board__inner {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
  }

  .page-faq .faq-index {
    position: sticky;
    top: 124px;
  }
}

/* 窄屏：索引改为横向滑动轨道 */
@media (max-width: 919px) {
  .page-faq .faq-index__list {
    display: flex;
    overflow-x: auto;
    gap: 1px;
    scrollbar-width: thin;
    -webkit-overflow-scrolling: touch;
  }

  .page-faq .faq-index__link {
    flex: 0 0 auto;
    min-width: 158px;
  }
}

@media (max-width: 560px) {
  .page-faq .faq-hero__mark {
    white-space: normal;
  }

  .page-faq .faq-hero__figure {
    clip-path: none;
  }

  .page-faq .faq-hero__actions .btn {
    flex: 1 1 100%;
    justify-content: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .pathmap__node,
  .page-faq .pathmap__node::after,
  .page-faq .pathmap__go,
  .page-faq .faq-index__link,
  .page-faq .faq-item,
  .page-faq .faq-item__icon::before,
  .page-faq .faq-item__icon::after {
    transition: none;
  }
}