.page-faq {
  --faq-rule: rgba(244, 247, 245, .12);
  --faq-rule-soft: rgba(244, 247, 245, .07);
  --faq-ink: rgba(5, 16, 11, .55);
  background: var(--ak-deep);
  color: var(--ak-white);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(30px, 6vw, 76px) 0 clamp(34px, 5vw, 68px);
  border-bottom: 1px solid var(--faq-rule);
  background:
    linear-gradient(112deg,
      var(--ak-ink) 0%,
      var(--ak-ink) 48%,
      rgba(11, 31, 23, .96) 48.15%,
      var(--ak-deep) 100%);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    repeating-linear-gradient(90deg, rgba(244, 247, 245, .045) 0 1px, transparent 1px 96px),
    repeating-linear-gradient(0deg, rgba(244, 247, 245, .035) 0 1px, transparent 1px 96px);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 48px);
  align-items: center;
}

.page-faq .faq-hero__copy .ak-breadcrumb {
  margin-bottom: clamp(14px, 2vw, 22px);
}

.page-faq .ak-breadcrumb__link {
  color: var(--ak-text-dim);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .18s ease, border-color .18s ease;
}

.page-faq .ak-breadcrumb__link:hover {
  color: var(--ak-cyan);
  border-bottom-color: var(--ak-cyan);
}

.page-faq .faq-hero__copy .ak-h1 {
  margin: 0 0 clamp(14px, 2vw, 20px);
  max-width: 20ch;
}

.page-faq .faq-hero__copy .ak-lede {
  max-width: 56ch;
  color: var(--ak-text-soft);
}

.page-faq .faq-hero__media {
  position: relative;
  margin: 0;
  border: 1px solid var(--ak-line-strong);
  background: var(--ak-char);
  overflow: hidden;
}

.page-faq .faq-hero__media::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 3px;
  background: linear-gradient(90deg, var(--ak-cyan), var(--ak-yellow) 58%, var(--ak-red));
}

.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  height: auto;
}

/* 首屏数据条 */
.page-faq .faq-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(22px, 3vw, 34px);
  border: 1px solid var(--faq-rule);
  background: var(--faq-rule-soft);
}

.page-faq .faq-facts__cell {
  background: var(--ak-ink);
  padding: 12px 13px 14px;
  border-top: 2px solid transparent;
}

.page-faq .faq-facts__cell:nth-child(1) { border-top-color: var(--ak-cyan); }
.page-faq .faq-facts__cell:nth-child(2) { border-top-color: var(--ak-yellow); }
.page-faq .faq-facts__cell:nth-child(3) { border-top-color: var(--ak-red); }

.page-faq .faq-facts__num {
  display: block;
  font-family: var(--ak-font-data);
  font-size: clamp(.95rem, 1.6vw, 1.15rem);
  font-weight: 600;
  letter-spacing: .01em;
  color: var(--ak-white);
}

.page-faq .faq-facts__label {
  display: block;
  margin-top: 4px;
  font-size: .8125rem;
  line-height: 1.5;
  color: var(--ak-text-dim);
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  padding: clamp(38px, 6vw, 78px) 0 clamp(48px, 7vw, 96px);
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 52px);
  align-items: start;
}

/* 左侧索引 */
.page-faq .faq-index {
  padding: 16px 16px 18px;
  border: 1px solid var(--ak-line);
  background: var(--ak-glass);
  backdrop-filter: blur(6px);
}

.page-faq .faq-index__title {
  margin: 0 0 12px;
  font-family: var(--ak-font-data);
  font-size: .75rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--ak-grey);
}

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

.page-faq .faq-index .ak-index__link {
  display: flex;
  gap: 10px;
  align-items: baseline;
  padding: 9px 8px;
  border-left: 2px solid transparent;
  color: var(--ak-text-soft);
  font-size: .9375rem;
  text-decoration: none;
  transition: color .18s ease, background-color .18s ease, border-color .18s ease;
}

.page-faq .faq-index .ak-index__link:hover,
.page-faq .faq-index .ak-index__link:focus-visible {
  color: var(--ak-white);
  border-left-color: var(--ak-cyan);
  background: rgba(24, 224, 200, .07);
}

.page-faq .faq-index__num {
  flex: none;
  font-size: .75rem;
  color: var(--ak-grey);
}

.page-faq .faq-index .ak-index__link:hover .faq-index__num {
  color: var(--ak-cyan);
}

.page-faq .faq-index__note {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--faq-rule-soft);
  font-size: .8125rem;
  line-height: 1.7;
  color: var(--ak-text-dim);
}

/* ---------- 问题组 ---------- */
.page-faq .faq-groups {
  min-width: 0;
}

.page-faq .faq-group {
  padding-top: clamp(28px, 4vw, 46px);
  margin-top: clamp(32px, 5vw, 58px);
  border-top: 1px solid var(--faq-rule);
  scroll-margin-top: calc(var(--ak-head-h) + 80px);
}

.page-faq .faq-group:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}

.page-faq .faq-group__head {
  display: flex;
  gap: 14px;
  align-items: baseline;
  flex-wrap: wrap;
}

.page-faq .faq-group__num {
  flex: none;
  padding: 2px 8px;
  border: 1px solid rgba(244, 197, 66, .42);
  border-radius: var(--ak-radius);
  font-size: .8125rem;
  letter-spacing: .08em;
  color: var(--ak-yellow);
}

.page-faq .faq-group__head .ak-h2 {
  margin: 0;
  flex: 1 1 12ch;
  min-width: 0;
}

.page-faq .faq-group__lead {
  margin: clamp(12px, 1.6vw, 18px) 0 clamp(16px, 2vw, 24px);
  max-width: 68ch;
  font-size: .9375rem;
  line-height: 1.85;
  color: var(--ak-text-soft);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-list {
  border-top: 1px solid var(--faq-rule);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .faq-item__q {
  position: relative;
  display: flex;
  gap: 12px;
  align-items: baseline;
  padding: 15px 36px 15px 10px;
  cursor: pointer;
  list-style: none;
  font-family: var(--ak-font-body);
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.7;
  color: var(--ak-white);
  border-left: 2px solid transparent;
  transition: color .18s ease, background-color .18s ease, border-color .18s ease;
}

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

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

.page-faq .faq-item__q:hover {
  color: var(--ak-cyan);
  background: rgba(24, 224, 200, .05);
  border-left-color: var(--ak-cyan);
}

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

.page-faq .faq-item__q::after {
  content: "+";
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--ak-font-data);
  font-size: 1.05rem;
  line-height: 1;
  color: var(--ak-grey);
  transition: color .18s ease, transform .2s ease;
}

.page-faq .faq-item[open] .faq-item__q {
  color: var(--ak-white);
}

.page-faq .faq-item[open] .faq-item__q::after {
  content: "–";
  color: var(--ak-cyan);
}

.page-faq .faq-item__idx {
  flex: none;
  padding-top: .18em;
  font-size: .8125rem;
  color: var(--ak-grey);
  transition: color .18s ease;
}

.page-faq .faq-item[open] .faq-item__idx {
  color: var(--ak-cyan);
}

.page-faq .faq-item__a {
  padding: 2px 36px 20px 10px;
  margin-left: 2px;
  border-left: 1px solid var(--faq-rule-soft);
  font-size: .9375rem;
  line-height: 1.9;
  color: var(--ak-text-soft);
}

.page-faq .faq-item__a p {
  margin: 0 0 .7em;
  max-width: 68ch;
}

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

.page-faq .faq-item__a .ak-data {
  color: var(--ak-yellow);
}

/* ---------- 配图 ---------- */
.page-faq .faq-figure {
  margin: clamp(20px, 2.6vw, 30px) 0 0;
  border: 1px solid var(--ak-line);
  background: var(--ak-char);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq .faq-figure figcaption {
  padding: 11px 14px;
  border-top: 1px solid var(--faq-rule-soft);
  font-family: var(--ak-font-data);
  font-size: .75rem;
  line-height: 1.7;
  letter-spacing: .02em;
  color: var(--ak-text-dim);
}

/* ---------- 联系支持面板 ---------- */
.page-faq .faq-support {
  margin-top: clamp(20px, 2.6vw, 30px);
  padding: clamp(18px, 2.4vw, 26px);
  border: 1px solid var(--ak-line);
  border-top: 2px solid var(--ak-cyan);
  background: linear-gradient(150deg, var(--ak-char) 0%, var(--ak-ink) 100%);
}

.page-faq .faq-support__row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  align-items: baseline;
  padding: 9px 0;
  border-bottom: 1px solid var(--faq-rule-soft);
}

.page-faq .faq-support__row:last-of-type {
  border-bottom: 0;
}

.page-faq .faq-support__label {
  flex: none;
  min-width: 6.5em;
  font-size: .75rem;
  letter-spacing: .12em;
  color: var(--ak-grey);
}

.page-faq .faq-support__val {
  font-size: .875rem;
  color: var(--ak-white);
  word-break: break-word;
}

.page-faq .faq-support__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(16px, 2vw, 22px);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
  }
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: 260px minmax(0, 1fr);
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--ak-head-h) + 22px);
  }
}

@media (max-width: 560px) {
  .page-faq .faq-facts {
    grid-template-columns: 1fr;
  }

  .page-faq .faq-item__q {
    padding-right: 30px;
    font-size: .9375rem;
  }

  .page-faq .faq-item__a {
    padding-right: 14px;
  }

  .page-faq .faq-support__label {
    min-width: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__q,
  .page-faq .faq-item__q::after,
  .page-faq .faq-item__idx,
  .page-faq .faq-index .ak-index__link {
    transition: none;
  }
}