.page-faq {
  --faq-cut: 22px;
  --faq-gap: clamp(1.75rem, 4vw, 3.25rem);
  padding-bottom: clamp(3rem, 8vw, 6rem);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding-block: clamp(1.5rem, 4vw, 2.75rem) clamp(2rem, 5vw, 3.5rem);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(120% 80% at 92% 4%, rgba(124, 77, 255, 0.18), transparent 62%),
    linear-gradient(112deg, transparent 0 62%, var(--violet-12) 62% 63.4%, transparent 63.4%);
}

.page-faq .crumbs {
  position: relative;
  margin-bottom: clamp(1rem, 3vw, 1.75rem);
}

.page-faq .crumbs ul {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: var(--step-1);
}

.page-faq .crumbs li {
  display: inline-flex;
  align-items: center;
}

.page-faq .crumbs li + li::before {
  content: "/";
  margin: 0 0.5rem;
  color: var(--line-strong);
  font-family: var(--font-mono);
}

.page-faq .crumbs a {
  color: var(--c-grey);
  text-decoration: none;
  transition: color 0.25s var(--ease);
}

.page-faq .crumbs a:hover,
.page-faq .crumbs a:focus-visible {
  color: var(--c-white);
}

.page-faq .crumbs [aria-current="page"] {
  color: var(--c-white);
}

.page-faq .faq-hero__grid {
  position: relative;
  display: grid;
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: center;
}

.page-faq .faq-hero__copy h1 {
  margin: 0.35rem 0 1rem;
  font-family: var(--font-display);
  font-size: var(--step-6);
  font-weight: 900;
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--c-white);
}

.page-faq .faq-hero__copy .lede {
  max-width: 56ch;
  margin: 0 0 1.35rem;
  color: var(--text-soft);
  font-size: var(--step-3);
  line-height: 1.75;
}

.page-faq .faq-hero__meta {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--step-1);
  color: var(--c-grey);
}

.page-faq .faq-hero__media {
  position: relative;
  margin: 0;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--c-surface);
  clip-path: polygon(0 0, calc(100% - 30px) 0, 100% 30px, 100% 100%, 30px 100%, 0 calc(100% - 30px));
}

.page-faq .faq-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(200deg, rgba(124, 77, 255, 0.22), transparent 55%);
}

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

/* ---------- 分组直达条 ---------- */
.page-faq .faq-index {
  border-block: 1px solid var(--line);
  background: rgba(20, 26, 63, 0.7);
  padding-block: 0.7rem;
}

.page-faq .faq-index__track {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-index__track::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-index__link {
  flex: none;
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.55rem 0.95rem;
  border: 1px solid var(--line);
  background: rgba(11, 16, 48, 0.6);
  color: var(--text-soft);
  font-size: var(--step-1);
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 0.25s var(--ease), color 0.25s var(--ease), background-color 0.25s var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  border-color: var(--violet-55);
  background: var(--violet-12);
  color: var(--c-white);
}

.page-faq .faq-index__code {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--c-violet);
}

/* ---------- 分组面板 ---------- */
.page-faq .faq-group {
  position: relative;
  margin-top: var(--faq-gap);
  padding: clamp(1.15rem, 3vw, 2.25rem);
  background: var(--c-surface);
  scroll-margin-top: calc(var(--topbar-h) + 76px);
  clip-path: polygon(0 0, calc(100% - 28px) 0, 100% 28px, 100% 100%, 28px 100%, 0 calc(100% - 28px));
}

.page-faq .faq-group::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 84px;
  height: 3px;
  background: var(--c-violet);
}

.page-faq .faq-group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem 0.9rem;
  margin-bottom: 1.4rem;
}

.page-faq .faq-group__num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  color: var(--c-violet);
  padding: 0.2rem 0.5rem;
  border: 1px solid var(--violet-30);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--step-4);
  font-weight: 800;
  line-height: 1.25;
  color: var(--c-white);
}

.page-faq .faq-group__note {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--c-grey);
  transform: rotate(-12deg);
  transform-origin: left center;
}

.page-faq .faq-group__figure {
  margin: 0 0 1.4rem;
  background: var(--c-bg);
  overflow: hidden;
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 0 100%);
}

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

/* ---------- 问答条目 ---------- */
.page-faq .qa-list {
  display: block;
}

.page-faq .qa {
  background: rgba(11, 16, 48, 0.36);
  border-left: 2px solid rgba(140, 147, 174, 0.2);
  transition: border-color 0.25s var(--ease), background-color 0.25s var(--ease);
}

.page-faq .qa + .qa {
  margin-top: 0.4rem;
}

.page-faq .qa:hover {
  border-left-color: var(--violet-55);
}

.page-faq .qa[open] {
  background: var(--c-bg);
  border-left-color: var(--c-amber);
}

.page-faq .qa__q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.75rem;
  padding: 0.9rem 1rem;
  cursor: pointer;
  list-style: none;
  font-size: var(--step-3);
  font-weight: 500;
  line-height: 1.55;
  color: var(--c-white);
  transition: color 0.25s var(--ease);
}

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

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

.page-faq .qa__q:focus-visible {
  outline: 2px solid var(--c-amber);
  outline-offset: -2px;
}

.page-faq .qa__num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--c-violet);
  transition: color 0.25s var(--ease);
}

.page-faq .qa[open] .qa__num {
  color: var(--c-amber);
}

.page-faq .qa__text {
  min-width: 0;
  overflow-wrap: break-word;
}

.page-faq .qa__arrow {
  position: relative;
  width: 22px;
  height: 22px;
  flex: none;
}

.page-faq .qa__arrow::before {
  content: "";
  position: absolute;
  top: 4px;
  left: 6px;
  width: 8px;
  height: 8px;
  border-right: 1.6px solid var(--c-grey);
  border-bottom: 1.6px solid var(--c-grey);
  transform: rotate(45deg);
  transition: transform 0.3s var(--ease), border-color 0.25s var(--ease);
}

.page-faq .qa[open] .qa__arrow::before {
  transform: rotate(-135deg);
  border-color: var(--c-amber);
}

.page-faq .qa__body {
  padding: 0 1rem 1.15rem;
}

.page-faq .qa__body-inner {
  border-left: 2px solid var(--violet-30);
  padding-left: 1rem;
  color: var(--text-soft);
  font-size: var(--step-2);
  line-height: 1.8;
}

.page-faq .qa__body-inner p {
  margin: 0 0 0.7rem;
}

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

.page-faq .qa__body-inner ul {
  margin: 0 0 0.7rem;
  padding-left: 1.15rem;
  list-style: none;
}

.page-faq .qa__body-inner li {
  position: relative;
  margin-bottom: 0.4rem;
}

.page-faq .qa__body-inner li::before {
  content: "";
  position: absolute;
  top: 0.72em;
  left: -1.05rem;
  width: 8px;
  height: 1.5px;
  background: var(--c-violet);
}

.page-faq .qa__body-inner strong {
  color: var(--c-white);
  font-weight: 600;
}

.page-faq .qa__body-inner a {
  color: var(--c-cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan-12);
  transition: border-color 0.25s var(--ease);
}

.page-faq .qa__body-inner a:hover,
.page-faq .qa__body-inner a:focus-visible {
  border-bottom-color: var(--c-cyan);
}

/* ---------- 底部指引 ---------- */
.page-faq .faq-next {
  margin-top: calc(var(--faq-gap) * 1.15);
}

.page-faq .faq-next__grid {
  display: grid;
  gap: 1rem;
  margin-top: 1.4rem;
}

.page-faq .faq-next__card {
  display: block;
  padding: 1.3rem;
  background: linear-gradient(180deg, var(--c-surface), rgba(11, 16, 48, 0.92));
  color: inherit;
  text-decoration: none;
  box-shadow: inset 0 0 0 1px var(--line);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 18px 100%, 0 calc(100% - 18px));
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.page-faq .faq-next__card:hover,
.page-faq .faq-next__card:focus-visible {
  transform: translateY(-3px);
  box-shadow: inset 0 0 0 1px var(--violet-55);
}

.page-faq .faq-next__k {
  display: block;
  margin-bottom: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  color: var(--c-violet);
}

.page-faq .faq-next__t {
  display: block;
  margin-bottom: 1rem;
  font-family: var(--font-display);
  font-size: var(--step-3);
  font-weight: 800;
  line-height: 1.4;
  color: var(--c-white);
}

.page-faq .faq-next__go {
  display: inline-block;
  font-size: var(--step-1);
  color: var(--c-amber);
  border-bottom: 1px solid var(--amber-14);
}

/* ---------- 响应式 ---------- */
@media (min-width: 860px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
  }

  .page-faq .faq-group--split .faq-group__lead {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 320px);
    gap: 1.75rem;
    align-items: start;
  }

  .page-faq .faq-group--split .faq-group__figure {
    margin-bottom: 1.4rem;
  }

  .page-faq .faq-group__figure {
    max-width: 680px;
  }

  .page-faq .faq-next__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .page-faq .faq-group {
    clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 20px 100%, 0 calc(100% - 20px));
  }

  .page-faq .qa__q {
    font-size: var(--step-2);
    gap: 0.6rem;
    padding: 0.8rem 0.85rem;
  }

  .page-faq .qa__body {
    padding: 0 0.85rem 1rem;
  }

  .page-faq .qa__body-inner {
    padding-left: 0.8rem;
  }

  .page-faq .faq-group__note {
    transform: none;
  }
}