.page-faq {
  --faq-panel: rgba(29, 36, 80, .5);
  --faq-accent: var(--cyan);
  color: var(--bone);
}

.page-faq .faq-inner {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  padding-block: clamp(24px, 5vw, 44px) clamp(28px, 5vw, 48px);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(120% 130% at 90% -20%, rgba(34, 242, 210, .16), transparent 62%),
    radial-gradient(100% 120% at 0% 120%, rgba(139, 108, 255, .16), transparent 62%);
}

.page-faq .faq-hero__kicker {
  margin: 20px 0 10px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-hero__title {
  margin: 0 0 18px;
  font-size: clamp(34px, 7vw, 68px);
  line-height: 1.05;
  letter-spacing: -.02em;
  font-weight: 800;
}

.page-faq .faq-hero__lede {
  margin: 0 0 22px;
  max-width: 62ch;
  font-size: clamp(15px, 1.8vw, 18px);
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .faq-status {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  padding: 10px 18px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  background: var(--glass);
  font-size: 14px;
  line-height: 1.5;
  color: var(--bone);
}

.page-faq .faq-status .num {
  color: var(--cyan);
  font-weight: 700;
}

/* ---------- 快速索引 ---------- */

.page-faq .faq-index {
  padding-block: clamp(28px, 5vw, 48px);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-index__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 16px;
  margin-bottom: 22px;
}

.page-faq .faq-index__title {
  margin: 0;
  font-size: clamp(20px, 3vw, 26px);
  letter-spacing: -.01em;
}

.page-faq .faq-index__note {
  margin: 0;
  font-size: 14px;
  color: var(--mist);
}

.page-faq .faq-index__layout {
  display: grid;
  gap: var(--gap-m);
}

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

.page-faq .faq-index__card {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--ink-800);
  color: var(--bone);
  text-decoration: none;
  transition: border-color .18s ease, background .18s ease, transform .18s ease;
}

.page-faq .faq-index__card:hover,
.page-faq .faq-index__card:focus-visible {
  border-color: var(--line-strong);
  background: var(--ink-700);
  transform: translateY(-2px);
}

.page-faq .faq-index__num {
  flex: 0 0 auto;
  padding-top: 2px;
  font-family: var(--mono);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  color: var(--cyan);
}

.page-faq .faq-index__text {
  display: block;
  min-width: 0;
}

.page-faq .faq-index__label {
  display: block;
  margin-bottom: 4px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -.01em;
}

.page-faq .faq-index__desc {
  display: block;
  font-size: 13px;
  line-height: 1.55;
  color: var(--mist);
}

.page-faq .faq-index__figure {
  margin: 0;
}

.page-faq .faq-index__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  object-fit: cover;
}

/* ---------- 分类区块 ---------- */

.page-faq .faq-cat {
  padding-block: clamp(34px, 6vw, 62px);
  border-bottom: 1px solid var(--line);
  scroll-margin-top: 132px;
}

.page-faq .faq-cat--time { --faq-accent: var(--blue); }
.page-faq .faq-cat--search { --faq-accent: var(--cyan); }
.page-faq .faq-cat--saved { --faq-accent: var(--violet); }
.page-faq .faq-cat--version { --faq-accent: var(--orange); }
.page-faq .faq-cat--service { --faq-accent: var(--green); }
.page-faq .faq-cat--resolve { --faq-accent: var(--mist); }

.page-faq .faq-cat__head {
  display: grid;
  gap: 14px;
  margin-bottom: 26px;
}

.page-faq .faq-cat__kicker {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--faq-accent);
}

.page-faq .faq-cat__kicker::before {
  content: "";
  display: inline-block;
  width: 20px;
  height: 2px;
  margin-right: 9px;
  vertical-align: middle;
  background: var(--faq-accent);
}

.page-faq .faq-cat__title {
  margin: 0;
  font-size: clamp(23px, 3.6vw, 36px);
  line-height: 1.15;
  letter-spacing: -.02em;
}

.page-faq .faq-cat__lead {
  margin: 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 折叠问答 ---------- */

.page-faq .qa-list {
  display: grid;
  gap: 12px;
  max-width: 920px;
}

.page-faq .qa {
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--ink-800);
  overflow: hidden;
  transition: border-color .18s ease;
}

.page-faq .qa[open] {
  border-color: var(--line-strong);
}

.page-faq .qa__q {
  position: relative;
  display: block;
  padding: 16px 52px 16px 18px;
  background: var(--glass);
  color: var(--bone);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  letter-spacing: -.01em;
  cursor: pointer;
  list-style: none;
}

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

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

.page-faq .qa__q::after {
  content: "+";
  position: absolute;
  top: 50%;
  right: 18px;
  transform: translateY(-50%);
  font-family: var(--mono);
  font-size: 20px;
  line-height: 1;
  color: var(--faq-accent);
}

.page-faq .qa[open] .qa__q::after {
  content: "–";
}

.page-faq .qa__q:hover {
  color: #ffffff;
}

.page-faq .qa__a {
  padding: 16px 18px 20px;
  border-top: 1px solid var(--line);
  background: var(--ink-800);
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

.page-faq .qa__a p {
  margin: 0 0 10px;
  max-width: 64ch;
}

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

.page-faq .qa__a .num {
  color: var(--cyan);
  font-weight: 700;
}

/* ---------- 配图 ---------- */

.page-faq .faq-figure {
  margin: 26px 0 0;
  max-width: 760px;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  object-fit: cover;
}

.page-faq .syncviz {
  margin: 26px 0 0;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--ink-800);
}

.page-faq .syncviz svg {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
}

.page-faq .syncviz figcaption {
  margin-top: 14px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--mist);
}

/* ---------- 反馈清单 ---------- */

.page-faq .faq-resolve {
  display: grid;
  gap: var(--gap-m);
}

.page-faq .checklist {
  display: grid;
  gap: 10px;
  margin: 0 0 20px;
  padding: 0;
  list-style: none;
}

.page-faq .checklist li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: var(--faq-panel);
  font-size: 15px;
  line-height: 1.6;
  color: var(--bone);
}

.page-faq .checklist input[type="checkbox"] {
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  margin: 3px 0 0;
  accent-color: var(--cyan);
}

.page-faq .checklist label {
  cursor: pointer;
}

.page-faq .faq-copybtn {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 13px 16px;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-sm);
  background: rgba(34, 242, 210, .07);
  color: var(--bone);
  font-family: var(--sans);
  font-size: 14px;
  line-height: 1.4;
  text-align: left;
  cursor: pointer;
  transition: background .18s ease, border-color .18s ease;
}

.page-faq .faq-copybtn:hover,
.page-faq .faq-copybtn:focus-visible {
  background: rgba(34, 242, 210, .15);
}

.page-faq .faq-copybtn[data-copied] {
  border-color: var(--green);
  background: rgba(53, 224, 138, .13);
}

.page-faq .faq-copybtn__icon {
  flex: 0 0 auto;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--cyan);
}

.page-faq .faq-copybtn__text {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .faq-copybtn__state {
  flex: 0 0 auto;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--mist);
}

.page-faq .faq-route {
  display: grid;
  gap: 14px;
  align-content: start;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(180deg, var(--ink-700), var(--ink-800));
}

.page-faq .faq-route__title {
  margin: 0;
  font-size: 18px;
  letter-spacing: -.01em;
}

.page-faq .faq-route__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .faq-route .btn {
  justify-self: start;
}

/* ---------- 响应式 ---------- */

@media (min-width: 600px) {
  .page-faq .faq-index__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-faq .faq-cat__head {
    grid-template-columns: minmax(0, .95fr) minmax(0, 1.25fr);
    align-items: end;
    gap: var(--gap-l);
  }

  .page-faq .faq-route {
    padding: 26px;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-index__layout {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, .85fr);
    align-items: start;
  }

  .page-faq .faq-resolve {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, .85fr);
    align-items: start;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-cat {
    scroll-margin-top: 116px;
  }
}

@media (max-width: 420px) {
  .page-faq .faq-status {
    display: flex;
    width: 100%;
    border-radius: var(--r-md);
  }

  .page-faq .faq-copybtn {
    flex-wrap: wrap;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__card,
  .page-faq .qa,
  .page-faq .faq-copybtn {
    transition: none;
  }

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