.page-faq {
  --faq-side-w: 288px;
  --faq-line: 1px solid var(--grid);
  padding: 18px 16px 60px;
  color: var(--text);
  background: var(--base);
}

.page-faq .faq-shell {
  max-width: var(--maxw);
  margin: 0 auto;
}

.page-faq .breadcrumb {
  margin-bottom: 16px;
  font-size: 12px;
  color: var(--muted);
}

.page-faq .breadcrumb a {
  color: var(--muted);
  text-decoration: none;
}

.page-faq .breadcrumb a:hover {
  color: var(--cyan);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  padding: 26px 18px 22px;
  border: var(--faq-line);
  background:
    linear-gradient(160deg, var(--section) 0%, var(--base) 62%),
    var(--base);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    repeating-linear-gradient(90deg, var(--grid) 0 1px, transparent 1px 24px),
    repeating-linear-gradient(0deg, var(--grid) 0 1px, transparent 1px 24px);
  opacity: 0.16;
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 46%;
  height: 100%;
  background: linear-gradient(120deg, transparent 40%, rgba(76, 243, 225, 0.09) 100%);
  clip-path: polygon(22% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-faq .faq-hero__frame {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 20px;
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--grid);
}

.page-faq .faq-hero__corner {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--muted);
  text-transform: uppercase;
}

.page-faq .faq-hero__corner--end {
  color: var(--cyan);
}

.page-faq .faq-hero__kicker {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-faq .faq-hero__kicker::before {
  content: "";
  display: inline-block;
  width: 3px;
  height: 12px;
  margin-right: 8px;
  vertical-align: -1px;
  background: var(--cyan);
}

.page-faq .faq-hero h1 {
  margin: 0 0 14px;
  max-width: 22ch;
  font-family: var(--font-display);
  font-size: clamp(26px, 7vw, 52px);
  line-height: 1.16;
  font-weight: 800;
  letter-spacing: -0.015em;
  overflow-wrap: break-word;
}

.page-faq .faq-hero__lead {
  margin: 0 0 22px;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

/* 搜索 */

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

.page-faq .faq-search__label {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.page-faq .faq-search__field {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 14px;
  border: 1px solid var(--grid);
  background: rgba(19, 30, 51, 0.86);
  transition: border-color 200ms var(--ease), box-shadow 200ms var(--ease);
}

.page-faq .faq-search__field:focus-within {
  border-color: var(--cyan);
  box-shadow: 0 0 0 1px rgba(76, 243, 225, 0.3);
}

.page-faq .faq-search__glyph {
  font-size: 16px;
  color: var(--cyan);
}

.page-faq .faq-search__input {
  flex: 1 1 auto;
  min-width: 0;
  padding: 14px 0;
  border: 0;
  background: transparent;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 14px;
}

.page-faq .faq-search__input::placeholder {
  color: #6d7f9c;
}

.page-faq .faq-search__input:focus {
  outline: none;
}

.page-faq .faq-search__note {
  margin: 10px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 通用章节头 ---------- */

.page-faq .section-head {
  display: grid;
  grid-template-columns: auto 1fr;
  column-gap: 12px;
  row-gap: 6px;
  align-items: baseline;
  padding-bottom: 14px;
  margin-bottom: 20px;
  border-bottom: var(--faq-line);
}

.page-faq .section-head__index {
  font-size: 12px;
  color: var(--cyan);
  padding-left: 8px;
  border-left: 2px solid var(--cyan);
  line-height: 1.2;
}

.page-faq .section-head__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(19px, 4.4vw, 28px);
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.3;
  overflow-wrap: break-word;
}

.page-faq .section-head__note {
  grid-column: 2;
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 分类索引 ---------- */

.page-faq .faq-index {
  margin-top: 40px;
}

.page-faq .faq-index__layout {
  display: grid;
  gap: 20px;
}

.page-faq .faq-index__wall {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-index__item {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr auto;
  grid-template-areas:
    "num name count"
    "num desc desc";
  column-gap: 12px;
  align-items: center;
  padding: 14px 14px 14px 16px;
  border: var(--faq-line);
  background: var(--panel);
  color: var(--text);
  text-decoration: none;
  transition: border-color 200ms var(--ease), background 200ms var(--ease), transform 200ms var(--ease);
}

.page-faq .faq-index__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 3px;
  height: 100%;
  background: var(--grid);
  transition: background 200ms var(--ease);
}

.page-faq .faq-index__item:hover,
.page-faq .faq-index__item:focus-visible {
  border-color: var(--cyan);
  background: #16233a;
  transform: translateX(2px);
}

.page-faq .faq-index__item:hover::before,
.page-faq .faq-index__item:focus-visible::before {
  background: var(--cyan);
}

.page-faq .faq-index__num {
  grid-area: num;
  align-self: start;
  font-size: 20px;
  font-weight: 600;
  color: var(--grid);
  letter-spacing: 0.04em;
}

.page-faq .faq-index__name {
  grid-area: name;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.page-faq .faq-index__desc {
  grid-area: desc;
  margin-top: 6px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted);
}

.page-faq .faq-index__count {
  grid-area: count;
  font-size: 12px;
  color: var(--gold);
  white-space: nowrap;
}

.page-faq .faq-index__art {
  margin: 0;
  border: var(--faq-line);
  background: var(--section);
}

.page-faq .faq-index__art img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  opacity: 0.86;
}

.page-faq .faq-index__art figcaption {
  padding: 12px 14px;
  border-top: var(--faq-line);
  font-size: 12px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 主体两栏 ---------- */

.page-faq .faq-body {
  display: grid;
  gap: 32px;
  margin-top: 44px;
}

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

/* ---------- 问答列表 ---------- */

.page-faq .faq-group + .faq-group {
  margin-top: 26px;
}

.page-faq .faq-group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 12px;
  margin: 0 0 8px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--text);
}

.page-faq .faq-group__head .mono {
  font-size: 12px;
  color: var(--violet);
  letter-spacing: 0.06em;
}

.page-faq .faq-group__count {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  color: var(--muted);
}

.page-faq .faq-item {
  border-bottom: var(--faq-line);
  background: linear-gradient(90deg, rgba(19, 30, 51, 0.5), transparent 60%);
}

.page-faq .faq-item:first-of-type {
  border-top: var(--faq-line);
}

.page-faq .faq-item__q {
  position: relative;
  display: block;
  padding: 15px 40px 15px 16px;
  font-size: 15px;
  font-weight: 500;
  line-height: 1.6;
  color: var(--text);
  cursor: pointer;
  list-style: none;
  transition: color 200ms var(--ease);
}

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

.page-faq .faq-item__q::after {
  content: "+";
  position: absolute;
  right: 14px;
  top: 14px;
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--muted);
  transition: color 200ms var(--ease);
}

.page-faq .faq-item__q::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 8px;
  width: 3px;
  background: transparent;
  transition: background 200ms var(--ease);
}

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

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

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

.page-faq .faq-item[open] .faq-item__q::before {
  background: var(--cyan);
}

.page-faq .faq-item__a {
  padding: 2px 18px 18px 16px;
  animation: faq-reveal 240ms var(--ease);
}

.page-faq .faq-item__a p {
  margin: 0 0 10px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

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

.page-faq .code-badge {
  display: inline-block;
  padding: 1px 6px;
  border: 1px solid var(--grid);
  border-radius: 4px;
  background: rgba(76, 243, 225, 0.08);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--cyan);
}

@keyframes faq-reveal {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- 适配要点 ---------- */

.page-faq .faq-adapt {
  margin-top: 46px;
  padding-top: 6px;
}

.page-faq .faq-adapt__figure {
  margin: 0 0 20px;
  border: var(--faq-line);
  background: var(--section);
}

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

.page-faq .faq-adapt__figure figcaption {
  padding: 12px 14px;
  border-top: var(--faq-line);
  font-size: 12px;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-adapt__points {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-adapt__point {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 12px;
  align-items: start;
  padding: 14px;
  border: 1px solid var(--grid);
  border-left: 3px solid var(--violet);
  background: var(--panel);
}

.page-faq .faq-adapt__key {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--violet);
  padding-top: 2px;
}

.page-faq .faq-adapt__point p {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-adapt__more {
  margin: 18px 0 0;
  padding-left: 12px;
  border-left: 2px solid var(--gold);
  font-size: 13px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-adapt__more a,
.page-faq .faq-side__text a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(76, 243, 225, 0.4);
}

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

/* ---------- 侧栏 ---------- */

.page-faq .faq-side {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-faq .faq-side__card {
  padding: 18px 16px;
  border: var(--faq-line);
  border-top: 2px solid var(--cyan);
  background: var(--panel);
}

.page-faq .faq-side__card--quiet {
  border-top: 1px solid var(--grid);
  background: var(--section);
}

.page-faq .faq-side__kicker {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-faq .faq-side__card--quiet .faq-side__kicker {
  color: var(--muted);
}

.page-faq .faq-side__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: -0.005em;
}

.page-faq .faq-side__list {
  margin: 0 0 14px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.page-faq .faq-side__list li {
  display: grid;
  grid-template-columns: 26px 1fr;
  gap: 8px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

.page-faq .faq-side__list .mono {
  color: var(--gold);
  font-size: 11px;
  padding-top: 2px;
}

.page-faq .faq-side__mail {
  margin: 0 0 8px;
  padding: 10px 12px;
  border: 1px dashed var(--grid);
  background: rgba(6, 11, 24, 0.6);
  font-size: 12px;
  color: var(--text);
  overflow-wrap: anywhere;
}

.page-faq .faq-side__time {
  margin: 0 0 14px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-side__text {
  margin: 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 页尾小节 ---------- */

.page-faq .faq-tail {
  margin-top: 52px;
  padding-top: 24px;
  border-top: 1px solid var(--grid);
}

.page-faq .faq-tail__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-faq .faq-tail__cell {
  padding: 16px;
  border: 1px solid var(--grid);
  background:
    linear-gradient(180deg, rgba(19, 30, 51, 0.9), rgba(12, 20, 36, 0.9));
}

.page-faq .faq-tail__cell h3 {
  margin: 0 0 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}

.page-faq .faq-tail__cell h3::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-right: 8px;
  vertical-align: 2px;
  background: var(--gold);
  transform: rotate(45deg);
}

.page-faq .faq-tail__cell p {
  margin: 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 断点 ---------- */

@media (min-width: 620px) {
  .page-faq {
    padding: 24px 24px 72px;
  }

  .page-faq .faq-hero {
    padding: 32px 28px 28px;
  }

  .page-faq .faq-index__wall {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-adapt__points {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-tail__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .page-faq {
    padding: 30px 32px 88px;
  }

  .page-faq .faq-hero {
    padding: 44px 44px 36px;
  }

  .page-faq .faq-hero h1 {
    max-width: 26ch;
  }

  .page-faq .faq-search__field {
    max-width: 620px;
  }

  .page-faq .faq-index__layout {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 24px;
    align-items: start;
  }

  .page-faq .faq-index__wall {
    grid-template-columns: 1fr;
  }

  .page-faq .faq-body {
    grid-template-columns: minmax(0, 1fr) var(--faq-side-w);
    gap: 36px;
    align-items: start;
  }

  .page-faq .faq-side {
    position: sticky;
    top: calc(var(--bar-h-compact) + 20px);
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__a {
    animation: none;
  }

  .page-faq .faq-index__item,
  .page-faq .faq-search__field {
    transition: none;
  }

  .page-faq .faq-index__item:hover {
    transform: none;
  }
}
<<<END>>>