.page-faq {
  --faq-side-w: 248px;
  padding-bottom: clamp(56px, 8vw, 108px);
}

/* ---------- 面包屑 ---------- */
.page-faq .crumbs {
  padding-top: clamp(20px, 3vw, 34px);
}

/* ---------- 首屏框景 ---------- */
.page-faq .faq-hero {
  padding-top: clamp(18px, 2.6vw, 30px);
}

.page-faq .faq-hero__inner {
  position: relative;
  display: grid;
  gap: clamp(24px, 4vw, 46px);
  padding: clamp(22px, 3.6vw, 46px);
  border: 1px solid var(--line);
  border-radius: 26px;
  background:
    radial-gradient(115% 130% at 90% -12%, rgba(164, 92, 255, 0.22), transparent 58%),
    linear-gradient(158deg, rgba(21, 13, 43, 0.92), rgba(11, 7, 24, 0.4));
  overflow: hidden;
}

.page-faq .faq-hero__inner::before {
  content: "";
  position: absolute;
  inset: 11px;
  border: 1px dashed rgba(58, 46, 94, 0.55);
  border-radius: 15px;
  pointer-events: none;
}

.page-faq .faq-hero__copy {
  position: relative;
  z-index: 1;
  min-width: 0;
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  max-width: 14em;
  font-size: clamp(27px, 4.1vw, 52px);
  line-height: 1.18;
  letter-spacing: 0.015em;
  color: var(--ink);
  text-shadow: 3px 3px 0 rgba(164, 92, 255, 0.3);
}

.page-faq .faq-hero__lead {
  margin: 18px 0 0;
  max-width: 620px;
  color: var(--ink-2);
  font-size: 16px;
  line-height: 1.78;
}

.page-faq .faq-hero__quick {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink-2);
}

.page-faq .faq-hero__quick li {
  display: flex;
  align-items: baseline;
  gap: 7px;
}

.page-faq .faq-hero__quick b {
  font-size: 18px;
  font-weight: 600;
  color: var(--cyan);
}

.page-faq .faq-hero__visual {
  position: relative;
  z-index: 1;
  min-width: 0;
}

/* ---------- 图片容器 ---------- */
.page-faq .frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--bg-deep);
}

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

.page-faq .frame__cap {
  margin: 10px 2px 0;
  max-width: 60ch;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--ink-2);
}

/* ---------- 主体两栏骨架 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: clamp(30px, 5vw, 52px);
  padding-top: clamp(34px, 5vw, 66px);
}

/* ---------- 左侧分组导航 ---------- */
.page-faq .faq-side {
  min-width: 0;
}

.page-faq .faq-side__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--ink-2);
}

.page-faq .faq-side__list {
  display: flex;
  gap: 10px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

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

.page-faq .faq-side__list a {
  display: block;
  padding: 8px 15px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink-2);
  text-decoration: none;
  font-size: 13.5px;
  line-height: 1.5;
  white-space: nowrap;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-faq .faq-side__list a:hover,
.page-faq .faq-side__list a:focus-visible {
  color: var(--ink);
  border-color: var(--neon);
  background: rgba(164, 92, 255, 0.12);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: 96px;
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(46px, 6vw, 82px);
  padding-top: clamp(38px, 5vw, 62px);
  border-top: 1px solid var(--line);
}

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

.page-faq .faq-group__no {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--neon);
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(20px, 2.4vw, 30px);
  line-height: 1.32;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.page-faq .faq-group__intro {
  margin: 14px 0 0;
  max-width: 640px;
  color: var(--ink-2);
  font-size: 15.5px;
  line-height: 1.78;
}

/* ---------- 问答条目 ---------- */
.page-faq .faq-list {
  margin-top: clamp(18px, 2.4vw, 28px);
  border-top: 1px solid var(--line);
}

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

.page-faq .faq-item__q {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 17px 40px 17px 0;
  list-style: none;
  cursor: pointer;
  color: var(--ink);
  font-size: 16px;
  line-height: 1.62;
  transition: color 0.2s var(--ease);
}

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

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

.page-faq .faq-item__n {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--ink-2);
  transition: color 0.2s var(--ease);
}

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

.page-faq .faq-item__q:hover .faq-item__text,
.page-faq .faq-item__q:hover .faq-item__n,
.page-faq .faq-item[open] .faq-item__n {
  color: var(--cyan);
}

.page-faq .faq-item__mark {
  position: absolute;
  right: 0;
  top: 22px;
  width: 16px;
  height: 16px;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  background: var(--line);
  transition: transform 0.24s var(--ease), background-color 0.24s var(--ease), box-shadow 0.24s var(--ease);
}

.page-faq .faq-item__mark::before {
  left: 0;
  top: 7px;
  width: 16px;
  height: 2px;
}

.page-faq .faq-item__mark::after {
  left: 7px;
  top: 0;
  width: 2px;
  height: 16px;
}

.page-faq .faq-item__q:hover .faq-item__mark::before,
.page-faq .faq-item__q:hover .faq-item__mark::after {
  background: var(--cyan);
}

.page-faq .faq-item[open] .faq-item__mark::before {
  background: var(--neon);
  box-shadow: 0 0 10px rgba(164, 92, 255, 0.85);
}

.page-faq .faq-item[open] .faq-item__mark::after {
  transform: scaleY(0);
}

.page-faq .faq-item__a {
  max-width: 660px;
  padding: 0 0 22px;
  color: var(--ink-2);
  font-size: 15.5px;
  line-height: 1.82;
}

.page-faq .faq-item__a > * {
  margin: 0 0 12px;
}

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

.page-faq .faq-item__a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 224, 255, 0.4);
  transition: border-color 0.2s var(--ease);
}

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

/* ---------- 步骤列表 ---------- */
.page-faq .faq-steps {
  margin: 10px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: faqstep;
}

.page-faq .faq-steps li {
  position: relative;
  padding: 5px 0 5px 38px;
  font-size: 15.5px;
  line-height: 1.75;
}

.page-faq .faq-steps li::before {
  counter-increment: faqstep;
  content: counter(faqstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 7px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--neon);
}

/* ---------- 图组 ---------- */
.page-faq .faq-figure {
  margin: clamp(26px, 3.6vw, 40px) 0 0;
  max-width: 580px;
}

/* ---------- 底部联系 ---------- */
.page-faq .faq-cta {
  margin-top: clamp(52px, 7vw, 92px);
  padding: clamp(30px, 4vw, 50px) clamp(22px, 3.2vw, 46px);
  border-top: 1px solid var(--line);
  border-radius: 0 0 28px 28px;
  background: radial-gradient(90% 130% at 0% 0%, rgba(164, 92, 255, 0.16), transparent 62%);
  scroll-margin-top: 90px;
}

.page-faq .faq-cta__title {
  margin: 0;
  font-size: clamp(20px, 2.4vw, 30px);
  line-height: 1.34;
  color: var(--ink);
}

.page-faq .faq-cta__text {
  margin: 14px 0 0;
  max-width: 620px;
  color: var(--ink-2);
  font-size: 15.5px;
  line-height: 1.78;
}

.page-faq .faq-cta__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 16px;
  margin-top: 24px;
}

.page-faq .faq-cta__mail {
  font-family: var(--font-mono);
  font-size: 13.5px;
  letter-spacing: 0.02em;
  color: var(--ink-2);
  word-break: break-all;
}

.page-faq .faq-copy[data-copied] {
  border-color: var(--mint);
  color: var(--mint);
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 780px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
    align-items: center;
    gap: clamp(30px, 4.5vw, 62px);
  }
}

/* ---------- 桌面两栏 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-body {
    grid-template-columns: var(--faq-side-w) minmax(0, 1fr);
    gap: clamp(40px, 5.5vw, 82px);
    align-items: start;
  }

  .page-faq .faq-side {
    position: sticky;
    top: clamp(24px, 3vw, 44px);
  }

  .page-faq .faq-side__list {
    display: block;
    padding-bottom: 0;
    overflow: visible;
    border-top: 1px solid var(--line);
  }

  .page-faq .faq-side__list li {
    display: block;
  }

  .page-faq .faq-side__list a {
    display: flex;
    align-items: baseline;
    gap: 12px;
    padding: 12px 2px;
    border: 0;
    border-bottom: 1px solid var(--line);
    border-radius: 0;
    white-space: normal;
    font-size: 14px;
    transition: color 0.2s var(--ease), padding-left 0.2s var(--ease);
  }

  .page-faq .faq-side__list a::before {
    content: "";
    flex: 0 0 auto;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--line);
    transform: translateY(-2px);
    transition: background-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
  }

  .page-faq .faq-side__list a:hover,
  .page-faq .faq-side__list a:focus-visible {
    background: transparent;
    border-color: transparent transparent var(--line);
    padding-left: 6px;
  }

  .page-faq .faq-side__list a:hover::before,
  .page-faq .faq-side__list a:focus-visible::before {
    background: var(--neon);
    box-shadow: 0 0 10px rgba(164, 92, 255, 0.9);
  }
}

/* ---------- 降低动态偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-side__list a,
  .page-faq .faq-item__q,
  .page-faq .faq-item__n,
  .page-faq .faq-item__mark::before,
  .page-faq .faq-item__mark::after,
  .page-faq .faq-item__a a {
    transition: none;
  }
}