/* ========================================
   page-faq — 问题解答
   ======================================== */

.page-faq {
  --faq-line: rgba(30, 92, 74, .55);
  --faq-tint: rgba(18, 51, 43, .55);
  --faq-panel: rgba(11, 15, 18, .62);
  display: block;
  color: var(--white);
  padding-bottom: 2rem;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  width: var(--shell);
  margin-inline: auto;
  padding: 2.5rem 0 2.25rem;
  display: grid;
  gap: 2rem;
  isolation: isolate;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: -1rem -1rem 0 -1rem;
  z-index: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, rgba(30, 92, 74, .26) 0 1px, transparent 1px 76px),
    radial-gradient(58% 76% at 8% 0%, rgba(25, 227, 194, .11), transparent 70%),
    radial-gradient(46% 66% at 97% 14%, rgba(255, 122, 26, .09), transparent 72%);
}

.page-faq .faq-hero__inner,
.page-faq .faq-hero__visual {
  position: relative;
  z-index: 1;
  min-width: 0;
}

.page-faq .faq-hero__inner .breadcrumb {
  margin-bottom: 1.5rem;
}

.page-faq .faq-hero h1 {
  font-family: var(--font-cond);
  font-weight: 800;
  font-size: clamp(2.1rem, 7vw, 3.9rem);
  line-height: 1.04;
  letter-spacing: -.01em;
  margin: .6rem 0 1rem;
  max-width: 22ch;
}

.page-faq .faq-hero .lede {
  max-width: 46ch;
  margin: 0 0 1.5rem;
  color: var(--muted);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
}

.page-faq .faq-hero__plate {
  margin: 0;
  transform: rotate(-1deg);
}

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

.page-faq .faq-rhythm-plate {
  margin: 0 0 1.25rem;
}

@media (min-width: 960px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
    align-items: center;
    gap: 3.5rem;
    padding: 3.5rem 0 3rem;
  }
}

/* ---------- 主体：索引 + 问答流 ---------- */

.page-faq .faq-body {
  width: var(--shell);
  margin-inline: auto;
  padding: 1.5rem 0 4rem;
  display: grid;
  gap: 2rem;
}

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

@media (min-width: 1000px) {
  .page-faq .faq-body {
    grid-template-columns: 238px minmax(0, 1fr);
    gap: 3.5rem;
    align-items: start;
    padding-top: 2.5rem;
  }
}

/* ---------- 索引侧栏 ---------- */

.page-faq .faq-index {
  border: 1px solid var(--faq-line);
  border-radius: var(--radius);
  background: var(--faq-tint);
  padding: 1rem 1rem 1.1rem;
  min-width: 0;
}

.page-faq .faq-index__title {
  margin: 0 0 .7rem;
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--muted);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .1rem;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: .55rem;
  padding: .45rem .5rem .45rem .7rem;
  border-left: 2px solid transparent;
  color: var(--white);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.35;
  transition: border-color .2s var(--ease), background-color .2s var(--ease), color .2s var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  border-left-color: var(--cyan);
  background: rgba(25, 227, 194, .08);
}

.page-faq .faq-index__num {
  font-size: 11px;
  color: var(--cyan);
  letter-spacing: .06em;
}

.page-faq .faq-index__note {
  margin: .85rem 0 0;
  padding-top: .75rem;
  border-top: 1px solid var(--faq-line);
  font-size: 12px;
  line-height: 1.65;
  color: var(--muted);
}

@media (min-width: 1000px) {
  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 1.5rem);
  }
}

@media (max-width: 999px) {
  .page-faq .faq-index__list {
    display: flex;
    gap: .4rem;
    overflow-x: auto;
    padding-bottom: .3rem;
    scrollbar-width: none;
  }

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

  .page-faq .faq-index__item {
    flex: 0 0 auto;
  }

  .page-faq .faq-index__link {
    border-left: 0;
    border-bottom: 2px solid transparent;
    padding: .4rem .65rem;
    white-space: nowrap;
  }

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    border-bottom-color: var(--cyan);
    border-left-color: transparent;
  }
}

/* ---------- 问答分区 ---------- */

.page-faq .faq-block {
  scroll-margin-top: calc(var(--header-h) + 1.5rem);
}

.page-faq .faq-block + .faq-block {
  margin-top: 3rem;
}

.page-faq .faq-block__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: .2rem .9rem;
  padding-bottom: .8rem;
  margin-bottom: 1.1rem;
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-block__num {
  grid-column: 1;
  grid-row: 1;
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--signal);
}

.page-faq .faq-block__title {
  grid-column: 2;
  grid-row: 1;
  margin: 0;
  font-family: var(--font-cond);
  font-weight: 700;
  font-size: clamp(1.35rem, 3.6vw, 1.9rem);
  line-height: 1.2;
}

.page-faq .faq-block__hint {
  grid-column: 2;
  grid-row: 2;
  margin: .25rem 0 0;
  font-size: 13px;
  line-height: 1.5;
  color: var(--muted);
}

/* ---------- 手风琴条目 ---------- */

.page-faq .faq-item {
  border: 1px solid var(--faq-line);
  border-radius: var(--radius);
  background: var(--faq-panel);
  margin-bottom: .6rem;
  overflow: hidden;
  transition: border-color .25s var(--ease), background-color .25s var(--ease);
}

.page-faq .faq-item:hover {
  border-color: rgba(25, 227, 194, .35);
}

.page-faq .faq-item[open] {
  border-color: rgba(25, 227, 194, .5);
  background: var(--faq-tint);
}

.page-faq .faq-item__q {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .45rem .75rem;
  padding: .9rem 1rem;
  cursor: pointer;
  list-style: none;
  user-select: none;
}

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

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

.page-faq .faq-item__idx {
  flex: 0 0 auto;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--cyan);
}

.page-faq .faq-item__text {
  flex: 1 1 12rem;
  min-width: 0;
  font-size: 15.5px;
  line-height: 1.5;
  color: var(--white);
}

.page-faq .faq-item__icon {
  position: relative;
  flex: 0 0 14px;
  width: 14px;
  height: 14px;
}

.page-faq .faq-item__icon::before,
.page-faq .faq-item__icon::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 2px;
  background: var(--muted);
  transform: translateY(-50%);
  transition: transform .25s var(--ease), background-color .25s var(--ease);
}

.page-faq .faq-item__icon::after {
  transform: translateY(-50%) rotate(90deg);
}

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

.page-faq .faq-item[open] .faq-item__icon::after {
  transform: translateY(-50%) rotate(0deg);
  background: var(--signal);
}

.page-faq .faq-item[open] .faq-item__q {
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-item__a {
  padding: .95rem 1rem 1.1rem 1rem;
}

.page-faq .faq-item[open] .faq-item__a {
  animation: faq-item-in .3s var(--ease) both;
}

.page-faq .faq-item__a p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(234, 246, 240, .84);
}

.page-faq .faq-item__a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(25, 227, 194, .4);
}

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

@keyframes faq-item-in {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 动效兼容 ---------- */

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

  .page-faq .faq-item[open] .faq-item__a {
    animation: none;
  }

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

/* ---------- 窄屏收尾 ---------- */

@media (max-width: 599px) {
  .page-faq .faq-hero {
    padding-top: 1.75rem;
  }

  .page-faq .faq-hero__actions .btn {
    flex: 1 1 auto;
    text-align: center;
  }

  .page-faq .faq-item__q {
    padding: .8rem .8rem;
  }

  .page-faq .faq-item__a {
    padding: .85rem .8rem 1rem .8rem;
  }

  .page-faq .faq-item__a p {
    font-size: 14px;
  }
}
<<<END>>>