.page-faq {
  --faq-index-w: 268px;
  --faq-accent: var(--cyan-signal);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-masthead {
  position: relative;
  padding: clamp(22px, 4vw, 40px) 0 clamp(26px, 4.5vw, 52px);
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(140deg, rgba(34, 224, 200, 0.09), transparent 44%),
    radial-gradient(130% 110% at 100% 0%, rgba(124, 107, 255, 0.16), transparent 62%),
    var(--ink-900);
  overflow: hidden;
}

.page-faq .faq-masthead::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 1px;
  background: linear-gradient(90deg, var(--cyan-signal), transparent 62%);
  opacity: 0.5;
}

.page-faq .faq-masthead__inner {
  display: grid;
  gap: 28px;
  margin-top: 22px;
}

@media (min-width: 900px) {
  .page-faq .faq-masthead__inner {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    gap: clamp(32px, 5vw, 72px);
    align-items: end;
  }
}

.page-faq .faq-masthead__lead h1 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(28px, 5.2vw, 46px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--paper);
  max-width: 16em;
}

.page-faq .faq-masthead__note {
  margin: 16px 0 0;
  max-width: 44em;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--mist);
}

.page-faq .faq-masthead__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-faq .faq-masthead__aside {
  position: relative;
  padding: 18px 20px 20px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--cyan-signal);
  background: rgba(12, 26, 46, 0.72);
}

.page-faq .faq-masthead__aside-kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan-signal);
}

.page-faq .faq-masthead__aside-text {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--paper);
}

.page-faq .faq-masthead__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin: 18px 0 0;
  padding: 14px 0 0;
  border-top: 1px solid var(--line-soft);
  list-style: none;
  font-size: 13px;
  color: var(--mist);
}

.page-faq .faq-masthead__meta .mono {
  color: var(--cyan-signal);
  margin-right: 6px;
}

/* ---------- 主体布局 ---------- */
.page-faq .faq-body {
  padding: clamp(32px, 5vw, 64px) 0 clamp(48px, 6vw, 88px);
}

.page-faq .faq-layout {
  display: grid;
  gap: 28px;
}

@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    gap: clamp(36px, 5vw, 64px);
    align-items: start;
  }
}

/* ---------- 左栏索引 ---------- */
.page-faq .faq-index {
  border: 1px solid var(--line);
  background: var(--ink-800);
  padding: 16px 16px 18px;
}

@media (min-width: 1000px) {
  .page-faq .faq-index {
    position: sticky;
    top: 96px;
  }
}

.page-faq .faq-index__label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mist);
}

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

.page-faq .faq-index__link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  padding: 10px 10px 10px 8px;
  border-left: 2px solid transparent;
  text-decoration: none;
  color: var(--paper);
  font-size: 14px;
  line-height: 1.5;
  transition: border-color 0.2s ease, background-color 0.2s ease, transform 0.2s ease;
}

.page-faq .faq-index__num {
  font-size: 12px;
  color: var(--cyan-signal);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  border-left-color: var(--cyan-signal);
  background: var(--ink-700);
  transform: translateX(2px);
}

.page-faq .faq-index__foot {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .faq-index__foot a {
  color: var(--cyan-signal);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
}

/* ---------- 分组 ---------- */
.page-faq .faq-answers {
  display: grid;
  gap: clamp(36px, 5vw, 60px);
}

.page-faq .faq-group {
  --g: var(--cyan-signal);
  scroll-margin-top: 96px;
}

.page-faq .faq-group--scope { --g: var(--violet-link); }
.page-faq .faq-group--access { --g: var(--orange-signal); }
.page-faq .faq-group--feedback { --g: var(--mist); }

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: 3px minmax(0, 1fr);
  gap: 16px;
  align-items: stretch;
  margin-bottom: 18px;
}

.page-faq .faq-group__bar {
  display: block;
  background: var(--g);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(20px, 2.6vw, 27px);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-group__note {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 20px;
  border: 1px solid var(--line);
  background: var(--ink-800);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 12 / 7;
}

.page-faq .faq-figure--wide img {
  aspect-ratio: 16 / 9;
}

.page-faq .faq-figure figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--line-soft);
  font-size: 12px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 问答条目 ---------- */
.page-faq .faq-list {
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--line-soft);
  background: transparent;
  transition: background-color 0.22s ease;
}

.page-faq .faq-item[open] {
  background: var(--ink-800);
}

.page-faq .faq-item__q {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
  padding: 16px 4px 16px 14px;
  cursor: pointer;
  list-style: none;
  font-size: clamp(15px, 1.8vw, 16.5px);
  line-height: 1.6;
  color: var(--paper);
}

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

.page-faq .faq-item__q::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--g, var(--cyan-signal));
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform 0.22s ease;
}

.page-faq .faq-item:hover .faq-item__q::before,
.page-faq .faq-item[open] .faq-item__q::before {
  transform: scaleY(1);
}

.page-faq .faq-item__q::after {
  content: "";
  width: 7px;
  height: 7px;
  margin-right: 8px;
  border-right: 2px solid var(--mist);
  border-bottom: 2px solid var(--mist);
  transform: rotate(45deg);
  transition: transform 0.24s ease, border-color 0.24s ease;
}

.page-faq .faq-item[open] .faq-item__q::after {
  transform: rotate(-135deg);
  border-color: var(--g, var(--cyan-signal));
}

.page-faq .faq-item__q:hover {
  color: var(--cyan-signal);
}

.page-faq .faq-item__num {
  font-size: 12px;
  color: var(--g, var(--cyan-signal));
  letter-spacing: 0.04em;
}

.page-faq .faq-item__a {
  position: relative;
  padding: 2px 24px 20px 44px;
}

.page-faq .faq-item__a::before {
  content: "";
  position: absolute;
  left: 14px;
  top: 6px;
  bottom: 20px;
  width: 1px;
  background: var(--g, var(--cyan-signal));
  opacity: 0.45;
}

.page-faq .faq-item__a p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: #C6D2E2;
}

.page-faq .faq-item__a a {
  color: var(--cyan-signal);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
}

/* ---------- 显现动画 ---------- */
.page-faq [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.page-faq [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .page-faq [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .page-faq .faq-index__link,
  .page-faq .faq-item,
  .page-faq .faq-item__q,
  .page-faq .faq-item__q::before,
  .page-faq .faq-item__q::after {
    transition: none;
  }

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    transform: none;
  }
}

/* ---------- 桌面增强 ---------- */
@media (min-width: 1000px) {
  .page-faq .faq-group__head {
    grid-template-columns: 3px minmax(0, 1fr);
    gap: 20px;
  }

  .page-faq .faq-item__q {
    padding: 18px 4px 18px 18px;
  }

  .page-faq .faq-item__a {
    padding: 2px 56px 22px 52px;
  }

  .page-faq .faq-item__a::before {
    left: 18px;
  }
}

@media (max-width: 620px) {
  .page-faq .faq-masthead__meta {
    gap: 6px 14px;
    font-size: 12px;
  }

  .page-faq .faq-item__q {
    padding-left: 12px;
  }

  .page-faq .faq-item__a {
    padding-left: 30px;
  }

  .page-faq .faq-item__a::before {
    left: 10px;
  }

  .page-faq .faq-index {
    padding: 14px 12px 16px;
  }
}
<<<END>>>