.page-faq {
  --faq-answer-width: 62ch;
  background: var(--gx-void);
  color: var(--gx-silver);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  padding: 40px 0 36px;
  border-bottom: 1px solid var(--gx-line);
  overflow: hidden;
}

.page-faq .faq-hero__grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(118deg, rgba(91, 75, 255, 0.22) 0%, rgba(5, 6, 13, 0) 58%),
    radial-gradient(circle at 82% 18%, rgba(160, 108, 255, 0.18), rgba(5, 6, 13, 0) 62%),
    repeating-linear-gradient(90deg, rgba(35, 42, 82, 0.55) 0 1px, rgba(5, 6, 13, 0) 1px 96px);
}

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

.page-faq .faq-hero__title {
  margin: 16px 0 0;
  font-family: var(--gx-font-display);
  font-size: clamp(34px, 8vw, 66px);
  font-weight: 300;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--gx-paper);
  max-width: 18ch;
}

.page-faq .faq-hero__lead {
  margin: 20px 0 0;
  max-width: 52ch;
  color: var(--gx-silver);
}

.page-faq .faq-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 40px;
  margin: 30px 0 0;
  padding: 20px 0 0;
  list-style: none;
  border-top: 1px solid var(--gx-line);
}

.page-faq .faq-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-faq .faq-stat__num {
  font-family: var(--gx-font-mono);
  font-size: 30px;
  line-height: 1;
  color: var(--gx-gold);
  letter-spacing: -0.01em;
}

.page-faq .faq-stat__label {
  font-family: var(--gx-font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--gx-mute);
}

/* ---------- 问题组索引 ---------- */

.page-faq .faq-index {
  position: relative;
  padding: 42px 0 48px;
  border-bottom: 1px solid var(--gx-line);
  overflow: hidden;
}

.page-faq .faq-index__backdrop {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.page-faq .faq-index__backdrop img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.26;
}

.page-faq .faq-index__backdrop::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, var(--gx-void) 0%, rgba(5, 6, 13, 0.72) 46%, var(--gx-void) 100%);
}

.page-faq .faq-index__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 26px;
}

.page-faq .faq-index__head {
  max-width: 40ch;
}

.page-faq .faq-index__title {
  margin: 12px 0 0;
  font-size: clamp(22px, 4vw, 30px);
  font-weight: 400;
  letter-spacing: -0.01em;
  line-height: 1.25;
  color: var(--gx-paper);
}

.page-faq .faq-index__desc {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--gx-mute);
}

.page-faq .faq-index__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

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

.page-faq .faq-index__item:last-child {
  border-bottom: 1px solid var(--gx-line);
}

.page-faq .faq-index__link {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  padding: 15px 6px;
  text-decoration: none;
  color: var(--gx-silver);
  transition: color 0.25s var(--gx-ease), background-color 0.25s var(--gx-ease), padding-left 0.25s var(--gx-ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--gx-paper);
  background-color: rgba(91, 75, 255, 0.14);
  padding-left: 16px;
  outline: none;
}

.page-faq .faq-index__num {
  font-family: var(--gx-font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--gx-gold);
}

.page-faq .faq-index__name {
  font-size: 16px;
  line-height: 1.5;
}

.page-faq .faq-index__count {
  font-family: var(--gx-font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--gx-mute);
  white-space: nowrap;
}

/* ---------- 问题分组 ---------- */

.page-faq .faq-group {
  padding: 48px 0 18px;
  border-bottom: 1px solid var(--gx-line);
}

.page-faq .faq-group__grid {
  display: grid;
  gap: 24px;
}

.page-faq .faq-group__num {
  margin: 0 0 10px;
  font-family: var(--gx-font-mono);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--gx-gold);
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(21px, 4vw, 29px);
  font-weight: 400;
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--gx-paper);
}

.page-faq .faq-group__note {
  margin: 10px 0 0;
  font-family: var(--gx-font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--gx-mute);
}

.page-faq .faq-group__list {
  max-width: 760px;
}

/* ---------- 可展开条目 ---------- */

.page-faq .faq-item {
  margin-bottom: 10px;
  border: 1px solid var(--gx-line);
  background: var(--gx-night);
  transition: border-color 0.3s var(--gx-ease), background-color 0.3s var(--gx-ease);
}

.page-faq .faq-item[data-open]:not([data-open="false"]) {
  border-color: rgba(91, 75, 255, 0.72);
  background: var(--gx-nebula);
}

.page-faq .faq-item__q {
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
}

.page-faq .faq-item__trigger {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  width: 100%;
  margin: 0;
  padding: 16px 14px;
  border: 0;
  background: none;
  color: var(--gx-silver);
  font-family: var(--gx-font-body);
  font-size: 16px;
  line-height: 1.6;
  text-align: left;
  cursor: pointer;
  transition: color 0.25s var(--gx-ease);
}

.page-faq .faq-item__trigger:hover {
  color: var(--gx-paper);
}

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

.page-faq .faq-item__dot {
  flex: none;
  width: 7px;
  height: 7px;
  margin-top: 10px;
  border-radius: 50%;
  background: var(--gx-line);
  transition: background-color 0.3s var(--gx-ease), box-shadow 0.3s var(--gx-ease);
}

.page-faq .faq-item[data-open]:not([data-open="false"]) .faq-item__dot {
  background: var(--gx-gold);
  box-shadow: 0 0 0 4px rgba(242, 178, 60, 0.16);
}

.page-faq .faq-item__code {
  flex: none;
  padding-top: 3px;
  font-family: var(--gx-font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gx-mute);
  transition: color 0.3s var(--gx-ease);
}

.page-faq .faq-item[data-open]:not([data-open="false"]) .faq-item__code {
  color: var(--gx-gold);
}

.page-faq .faq-item__text {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .faq-item__sign {
  position: relative;
  flex: none;
  width: 14px;
  height: 14px;
  margin-top: 7px;
  margin-left: 6px;
}

.page-faq .faq-item__sign::before,
.page-faq .faq-item__sign::after {
  content: "";
  position: absolute;
  background: var(--gx-signal);
  transition: transform 0.3s var(--gx-ease), background-color 0.3s var(--gx-ease);
}

.page-faq .faq-item__sign::before {
  top: 6px;
  left: 0;
  width: 14px;
  height: 2px;
}

.page-faq .faq-item__sign::after {
  top: 0;
  left: 6px;
  width: 2px;
  height: 14px;
}

.page-faq .faq-item[data-open]:not([data-open="false"]) .faq-item__sign::before {
  background: var(--gx-gold);
}

.page-faq .faq-item[data-open]:not([data-open="false"]) .faq-item__sign::after {
  transform: scaleY(0);
  background: var(--gx-gold);
}

.page-faq .faq-item__body {
  padding: 0 14px 18px 45px;
}

.page-faq .faq-item__body[hidden] {
  display: none;
}

.page-faq .faq-item__body p {
  max-width: var(--faq-answer-width);
  margin: 0 0 12px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--gx-silver);
}

.page-faq .faq-item__body p:last-child {
  margin-bottom: 0;
}

.page-faq .faq-link {
  color: var(--gx-signal);
  text-decoration: none;
  border-bottom: 1px solid rgba(138, 125, 255, 0.45);
  transition: border-color 0.2s var(--gx-ease), color 0.2s var(--gx-ease);
}

.page-faq .faq-link:hover,
.page-faq .faq-link:focus-visible {
  color: var(--gx-paper);
  border-bottom-color: var(--gx-gold);
}

/* ---------- 兜底入口 ---------- */

.page-faq .faq-help {
  padding: 54px 0 72px;
}

.page-faq .faq-help__inner {
  display: grid;
  gap: 34px;
}

.page-faq .faq-help__title {
  margin: 14px 0 0;
  font-size: clamp(24px, 5vw, 38px);
  font-weight: 300;
  line-height: 1.2;
  letter-spacing: -0.015em;
  color: var(--gx-paper);
  max-width: 20ch;
}

.page-faq .faq-help__desc {
  margin: 16px 0 0;
  max-width: 46ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--gx-silver);
}

.page-faq .faq-help__prep {
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--gx-line);
}

.page-faq .faq-help__prep li {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  align-items: baseline;
  padding: 12px 0;
  border-bottom: 1px solid var(--gx-line);
  font-size: 15px;
  line-height: 1.7;
  color: var(--gx-silver);
}

.page-faq .faq-help__k {
  flex: none;
  min-width: 84px;
  font-family: var(--gx-font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--gx-gold);
}

.page-faq .faq-help__cta {
  margin-top: 28px;
}

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

.page-faq .faq-help__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border: 1px solid var(--gx-line);
  background: var(--gx-night);
}

.page-faq .faq-help__figure figcaption {
  margin-top: 12px;
  font-family: var(--gx-font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  line-height: 1.8;
  color: var(--gx-mute);
}

/* ---------- 桌面布局 ---------- */

@media (min-width: 720px) {
  .page-faq .faq-hero {
    padding: 56px 0 48px;
  }

  .page-faq .faq-index {
    padding: 56px 0 64px;
  }

  .page-faq .faq-item__trigger {
    padding: 18px 20px;
    gap: 16px;
  }

  .page-faq .faq-item__body {
    padding: 0 24px 22px 60px;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-index__inner {
    grid-template-columns: 320px minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }

  .page-faq .faq-group {
    padding: 64px 0 22px;
  }

  .page-faq .faq-group__grid {
    grid-template-columns: 216px minmax(0, 1fr);
    gap: 52px;
  }

  .page-faq .faq-group__aside {
    position: sticky;
    top: calc(var(--gx-header-h) + 26px);
    align-self: start;
    padding-left: 18px;
    border-left: 1px solid var(--gx-line);
  }

  .page-faq .faq-help__inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.92fr);
    align-items: center;
    gap: 60px;
  }
}