.page-faq {
  --faq-paper-link: #3d2ba8;
  position: relative;
  padding: 1.25rem 0 3.5rem;
  color: var(--star);
  background:
    radial-gradient(760px 380px at 84% -10%, rgba(138, 107, 255, .22), transparent 64%),
    radial-gradient(620px 340px at 4% 2%, rgba(53, 224, 210, .13), transparent 68%);
  background-repeat: no-repeat;
}

.page-faq .crumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .45rem;
  margin: 0 0 1.25rem;
  padding: 0;
  list-style: none;
  font-size: .75rem;
  letter-spacing: .12em;
  color: var(--mist);
}

.page-faq .crumbs li {
  display: flex;
  align-items: center;
  gap: .45rem;
}

.page-faq .crumbs li + li::before {
  content: "/";
  color: var(--line);
}

.page-faq .crumbs a {
  color: var(--mist);
  text-decoration: none;
  transition: color var(--t-fast);
}

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

/* 首屏框景 */
.page-faq .faq-hero {
  position: relative;
  display: grid;
  gap: 1.25rem;
  padding: 1.5rem 1.15rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-l);
  background: linear-gradient(158deg, rgba(18, 26, 51, .94) 0%, rgba(11, 16, 32, .97) 58%, rgba(6, 9, 20, .98) 100%);
}

.page-faq .faq-hero__main .eyebrow {
  margin: 0;
  font-size: .72rem;
  letter-spacing: .2em;
  color: var(--violet-soft);
}

.page-faq .faq-hero h1 {
  margin: .55rem 0 0;
  font-family: var(--ff-display);
  font-size: clamp(1.6rem, 5.4vw, 2.9rem);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -.015em;
  color: var(--star);
}

.page-faq .faq-hero__lede {
  margin: .85rem 0 0;
  max-width: 54ch;
  font-size: .96rem;
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .faq-hero__quick {
  align-self: start;
  padding: .9rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background: rgba(6, 9, 20, .6);
}

.page-faq .faq-hero__quick-title {
  margin: 0 0 .55rem;
  font-family: var(--ff-mono);
  font-size: .7rem;
  letter-spacing: .16em;
  color: var(--violet-soft);
}

.page-faq .faq-hero__quick ol {
  display: grid;
  gap: .35rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero__quick a {
  display: flex;
  align-items: baseline;
  gap: .6rem;
  padding: .5rem .6rem;
  border: 1px solid transparent;
  border-radius: var(--radius-s);
  color: var(--star);
  font-size: .9rem;
  line-height: 1.5;
  text-decoration: none;
  transition: border-color var(--t-fast), background-color var(--t-fast), color var(--t-fast);
}

.page-faq .faq-hero__quick a:hover,
.page-faq .faq-hero__quick a:focus-visible {
  border-color: rgba(53, 224, 210, .6);
  background: rgba(53, 224, 210, .07);
  color: var(--cyan-soft);
  outline: none;
}

.page-faq .faq-hero__quick .num {
  color: var(--cyan);
  font-size: .76rem;
}

/* 索引 + 问答双栏 */
.page-faq .faq-body {
  display: grid;
  gap: 2rem;
  margin-top: 2.25rem;
}

.page-faq .faq-rail {
  padding: .25rem 0 .75rem;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-rail__title {
  margin: 0 0 .55rem;
  font-family: var(--ff-mono);
  font-size: .7rem;
  letter-spacing: .18em;
  color: var(--mist);
}

.page-faq .faq-rail__list {
  display: flex;
  gap: .45rem;
  margin: 0;
  padding: 0 0 .35rem;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

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

.page-faq .faq-rail__list a {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .4rem .7rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--mist);
  font-size: .78rem;
  letter-spacing: .04em;
  white-space: nowrap;
  text-decoration: none;
  transition: border-color var(--t-fast), color var(--t-fast), background-color var(--t-fast);
}

.page-faq .faq-rail__list a:hover,
.page-faq .faq-rail__list a:focus-visible {
  border-color: var(--cyan);
  color: var(--star);
  background: rgba(53, 224, 210, .08);
  outline: none;
}

.page-faq .faq-rail__count {
  display: none;
}

/* 分组 */
.page-faq .faq-groups {
  display: grid;
  gap: 2.5rem;
}

.page-faq .faq-group {
  position: relative;
  scroll-margin-top: 5.5rem;
}

.page-faq .faq-group__head {
  padding-bottom: .8rem;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group__head h2 {
  margin: 0;
  font-family: var(--ff-display);
  font-size: clamp(1.25rem, 4vw, 1.75rem);
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--star);
}

.page-faq .faq-group__no {
  margin-right: .55rem;
  font-size: .74rem;
  letter-spacing: .12em;
  color: var(--cyan);
  vertical-align: .22em;
}

.page-faq .faq-group__scene {
  margin: .5rem 0 0;
  font-size: .9rem;
  line-height: 1.75;
  color: var(--mist);
}

/* 配图 */
.page-faq .faq-figure {
  margin: 1.1rem 0 .25rem;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background: var(--panel);
}

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

.page-faq .faq-figure figcaption {
  padding: .55rem .85rem;
  border-top: 1px solid var(--line);
  font-size: .76rem;
  line-height: 1.6;
  letter-spacing: .04em;
  color: var(--mist);
}

/* 折叠问答 */
.page-faq .faq-list {
  display: grid;
  gap: .5rem;
  margin-top: 1rem;
}

.page-faq .faq-item {
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background: rgba(11, 16, 32, .7);
  transition: border-color var(--t-fast), background-color var(--t-fast);
}

.page-faq .faq-item:hover {
  border-color: rgba(53, 224, 210, .35);
}

.page-faq .faq-item[open] {
  border-color: rgba(53, 224, 210, .5);
  background: rgba(18, 26, 51, .88);
}

.page-faq .faq-item summary {
  display: flex;
  align-items: flex-start;
  gap: .65rem;
  padding: .8rem .95rem;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-item summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-faq .faq-item__no {
  flex: 0 0 auto;
  padding-top: .2rem;
  font-size: .7rem;
  letter-spacing: .1em;
  color: var(--cyan);
}

.page-faq .faq-item__q {
  flex: 1;
  font-size: .96rem;
  font-weight: 600;
  line-height: 1.55;
  color: var(--star);
}

.page-faq .faq-item summary::after {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--ff-mono);
  font-size: 1.05rem;
  line-height: 1.3;
  color: var(--mist);
  transition: color var(--t-fast);
}

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

.page-faq .faq-item__a {
  padding: 0 .95rem .9rem 2.35rem;
  font-size: .92rem;
  line-height: 1.8;
  color: var(--mist);
}

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

.page-faq .faq-item__a a {
  color: var(--cyan-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 224, 210, .45);
  transition: color var(--t-fast), border-color var(--t-fast);
}

.page-faq .faq-item__a a:hover,
.page-faq .faq-item__a a:focus-visible {
  color: var(--star);
  border-color: var(--star);
}

/* 暖纸清单 */
.page-faq .faq-checklist {
  margin-top: 1.15rem;
  padding: 1.1rem 1rem 1.15rem;
  border-radius: var(--radius-l);
}

.page-faq .faq-checklist .eyebrow {
  margin: 0 0 .7rem;
  font-size: .7rem;
  letter-spacing: .16em;
  color: rgba(11, 16, 32, .62);
}

.page-faq .faq-checklist ul {
  display: grid;
  gap: .5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-checklist label {
  display: flex;
  align-items: flex-start;
  gap: .55rem;
  font-size: .9rem;
  line-height: 1.65;
  color: var(--ink-paper);
  cursor: pointer;
}

.page-faq .faq-checklist input {
  flex: 0 0 auto;
  width: 15px;
  height: 15px;
  margin-top: .3rem;
  accent-color: var(--violet);
}

.page-faq .faq-checklist__note {
  margin: .85rem 0 0;
  font-size: .8rem;
  line-height: 1.7;
  color: rgba(11, 16, 32, .72);
}

.page-faq .faq-checklist__note a {
  color: var(--faq-paper-link);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

.page-faq .faq-checklist__note a:hover,
.page-faq .faq-checklist__note a:focus-visible {
  color: var(--ink-paper);
}

@media (min-width: 640px) {
  .page-faq {
    padding-top: 1.75rem;
  }

  .page-faq .faq-hero {
    padding: 2rem 1.75rem;
  }

  .page-faq .faq-checklist {
    padding: 1.35rem 1.4rem 1.4rem;
  }
}

@media (min-width: 800px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: center;
    gap: 1.75rem;
  }

  .page-faq .faq-list {
    gap: .6rem;
  }

  .page-faq .faq-item__q {
    font-size: 1rem;
  }
}

@media (min-width: 960px) {
  .page-faq {
    padding-bottom: 4.5rem;
  }

  .page-faq .faq-body {
    grid-template-columns: 210px minmax(0, 1fr);
    gap: 3rem;
    margin-top: 3rem;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 6.5rem;
    align-self: start;
    padding: 0;
    border-bottom: 0;
  }

  .page-faq .faq-rail__list {
    position: relative;
    flex-direction: column;
    gap: .1rem;
    padding: .25rem 0 .25rem 1.15rem;
    overflow: visible;
  }

  .page-faq .faq-rail__list::before {
    content: "";
    position: absolute;
    left: 2px;
    top: .45rem;
    bottom: .45rem;
    width: 1px;
    background: linear-gradient(180deg, rgba(138, 107, 255, .8), rgba(53, 224, 210, .55), rgba(42, 53, 84, .15));
  }

  .page-faq .faq-rail__list li {
    position: relative;
    flex: none;
  }

  .page-faq .faq-rail__list li::before {
    content: "";
    position: absolute;
    left: -1.15rem;
    top: .62rem;
    width: 6px;
    height: 6px;
    border: 1px solid var(--cyan);
    background: var(--void);
    transform: rotate(45deg);
    transition: background-color var(--t-fast), border-color var(--t-fast);
  }

  .page-faq .faq-rail__list li:hover::before {
    background: var(--cyan);
    border-color: var(--cyan);
  }

  .page-faq .faq-rail__list a {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: .5rem;
    padding: .28rem 0;
    border: 0;
    border-radius: 0;
    background: none;
    font-size: .84rem;
    white-space: normal;
  }

  .page-faq .faq-rail__list a:hover,
  .page-faq .faq-rail__list a:focus-visible {
    background: none;
    color: var(--cyan-soft);
  }

  .page-faq .faq-rail__count {
    display: inline;
    font-size: .7rem;
    color: var(--cyan);
    opacity: .65;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    transition: none !important;
    animation: none !important;
  }
}