.page-faq {
  --faq-ink: #D5E1EC;
  --faq-line: rgba(0, 224, 184, .18);
  --faq-card-top: rgba(14, 42, 71, .94);
  --faq-card-bottom: rgba(7, 26, 43, .96);
  background: var(--deep);
  color: var(--cream);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 4.5vw, 46px) 0 clamp(34px, 5.5vw, 68px);
  background:
    radial-gradient(115% 95% at 86% 0%, rgba(0, 224, 184, .22) 0%, transparent 58%),
    radial-gradient(85% 75% at 4% 100%, rgba(255, 107, 74, .16) 0%, transparent 62%),
    linear-gradient(158deg, var(--deep) 0%, var(--night) 58%, var(--deep) 100%);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(118deg, rgba(246, 240, 230, .055) 0 1px, transparent 1px 24px);
  pointer-events: none;
}

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

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

.page-faq .faq-hero__title {
  margin: 0;
  max-width: 15em;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(29px, 5.6vw, 60px);
  line-height: 1.1;
  letter-spacing: -.012em;
  color: var(--cream);
}

.page-faq .faq-hero__lede {
  margin: 20px 0 0;
  max-width: 58ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.9;
  color: var(--mist);
}

/* ---------- 主体骨架 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 52px);
  padding-top: clamp(34px, 5vw, 60px);
  padding-bottom: var(--section-y);
}

/* ---------- 左侧分类索引 ---------- */
.page-faq .faq-rail {
  align-self: start;
}

.page-faq .faq-rail__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .24em;
  color: var(--muted);
}

.page-faq .faq-rail__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 8px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-rail__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  white-space: nowrap;
  padding: 9px 15px;
  border: 1px solid var(--faq-line);
  border-radius: 999px;
  font-size: 14px;
  color: var(--mist);
  text-decoration: none;
  transition: color .25s var(--ease), border-color .25s var(--ease), background .25s var(--ease), transform .25s var(--ease);
}

.page-faq .faq-rail__num {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--cyan);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  color: var(--cyan);
  border-color: rgba(0, 224, 184, .55);
  background: rgba(0, 224, 184, .08);
}

/* ---------- 问答区块 ---------- */
.page-faq .faq-block {
  scroll-margin-top: 108px;
}

.page-faq .faq-block + .faq-block {
  margin-top: clamp(46px, 6vw, 84px);
}

.page-faq .faq-block__head {
  position: relative;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 14px;
  padding-bottom: 14px;
  margin-bottom: 22px;
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-block__head::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 72px;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--yellow), var(--coral));
}

.page-faq .faq-block__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 800;
  letter-spacing: -.004em;
  color: var(--cream);
}

.page-faq .faq-block__meta {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--yellow);
}

/* ---------- 配图 ---------- */
.page-faq .faq-shot {
  position: relative;
  margin: 0 0 24px;
  overflow: hidden;
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(0, 224, 184, .16), rgba(14, 42, 71, .92));
  box-shadow: var(--shadow-lift);
}

.page-faq .faq-shot img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(.94) contrast(1.05);
}

.page-faq .faq-shot__cap {
  position: absolute;
  left: 14px;
  bottom: 12px;
  padding: 5px 10px;
  border: 1px solid var(--faq-line);
  border-radius: 3px;
  background: rgba(7, 26, 43, .8);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--cyan);
}

/* ---------- 问答折叠 ---------- */
.page-faq .qa {
  position: relative;
  margin-bottom: 10px;
  border: 1px solid rgba(143, 166, 189, .16);
  border-radius: var(--radius);
  background: linear-gradient(180deg, var(--faq-card-top), var(--faq-card-bottom));
  overflow: hidden;
  transition: border-color .28s var(--ease), box-shadow .28s var(--ease);
}

.page-faq .qa::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: linear-gradient(180deg, var(--cyan), var(--yellow));
  opacity: 0;
  transition: opacity .28s var(--ease);
}

.page-faq .qa:hover,
.page-faq .qa[open] {
  border-color: rgba(0, 224, 184, .42);
  box-shadow: 0 18px 42px -30px rgba(0, 224, 184, .7);
}

.page-faq .qa:hover::before,
.page-faq .qa[open]::before {
  opacity: 1;
}

.page-faq .qa__q {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  font-size: clamp(15px, 1.5vw, 17px);
  font-weight: 600;
  line-height: 1.55;
  color: var(--cream);
  transition: color .25s var(--ease);
}

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

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

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

.page-faq .qa__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--cyan);
}

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

.page-faq .qa__mark {
  position: relative;
  flex: none;
  width: 16px;
  height: 16px;
}

.page-faq .qa__mark::before,
.page-faq .qa__mark::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 2px;
  background: var(--cyan);
  transform: translateY(-50%);
  transition: transform .3s var(--ease), opacity .3s var(--ease);
}

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

.page-faq .qa[open] .qa__mark::after {
  transform: translateY(-50%) rotate(0deg);
  opacity: 0;
}

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

.page-faq .qa__a {
  padding: 0 18px 20px;
}

.page-faq .qa__a p {
  margin: 0;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.9;
  color: var(--faq-ink);
}

.page-faq .qa__a a {
  color: var(--yellow);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 209, 102, .45);
  transition: color .25s var(--ease), border-color .25s var(--ease);
}

.page-faq .qa__a a:hover {
  color: var(--coral);
  border-color: var(--coral);
}

.page-faq .qa--lead {
  border-color: rgba(0, 224, 184, .3);
  background: linear-gradient(180deg, rgba(0, 224, 184, .1), var(--faq-card-bottom));
}

.page-faq .qa--lead .qa__q {
  padding: 22px 20px;
  font-size: clamp(17px, 2.1vw, 22px);
  line-height: 1.45;
}

.page-faq .qa--lead .qa__a {
  padding: 0 20px 24px;
}

/* ---------- 联系面板 ---------- */
.page-faq .faq-contact {
  margin-top: 30px;
  padding: clamp(22px, 3.2vw, 34px);
  border: 1px solid rgba(0, 224, 184, .26);
  border-radius: var(--radius);
  background:
    radial-gradient(110% 130% at 100% 0%, rgba(255, 107, 74, .2) 0%, transparent 58%),
    linear-gradient(140deg, rgba(0, 224, 184, .14), rgba(14, 42, 71, .96));
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, var(--cut) 100%, 0 calc(100% - var(--cut)));
}

.page-faq .faq-contact__eyebrow {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .24em;
  color: var(--cyan);
}

.page-faq .faq-contact__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(20px, 2.6vw, 27px);
  font-weight: 800;
  color: var(--cream);
}

.page-faq .faq-contact__text {
  margin: 0 0 18px;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--faq-ink);
}

.page-faq .faq-contact__list {
  margin: 0 0 22px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-faq .faq-contact__list li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 15px;
  color: var(--faq-ink);
}

.page-faq .faq-contact__key {
  flex: none;
  min-width: 42px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--yellow);
}

.page-faq .faq-contact__list a {
  color: var(--cream);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 224, 184, .4);
  transition: color .25s var(--ease), border-color .25s var(--ease);
}

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

.page-faq .faq-contact__btn {
  align-self: flex-start;
}

/* ---------- 平板 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-shot {
    margin-bottom: 26px;
  }

  .page-faq .qa__q {
    padding: 18px 22px;
  }

  .page-faq .qa__a {
    padding: 0 22px 22px;
  }

  .page-faq .qa--lead .qa__q {
    padding: 24px 24px;
  }

  .page-faq .qa--lead .qa__a {
    padding: 0 24px 26px;
  }
}

/* ---------- 桌面：左侧索引固定跟随 ---------- */
@media (min-width: 1024px) {
  .page-faq .faq-body {
    grid-template-columns: 236px minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 104px;
    padding-right: 6px;
  }

  .page-faq .faq-rail__list {
    flex-direction: column;
    gap: 3px;
    padding-bottom: 0;
    overflow: visible;
  }

  .page-faq .faq-rail__link {
    padding: 10px 12px;
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0;
    white-space: normal;
  }

  .page-faq .faq-rail__link:hover,
  .page-faq .faq-rail__link:focus-visible {
    background: rgba(0, 224, 184, .08);
    border-left-color: var(--cyan);
    transform: translateX(4px);
  }

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

/* ---------- 动效收敛 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .qa__q,
  .page-faq .qa__mark::before,
  .page-faq .qa__mark::after,
  .page-faq .faq-rail__link {
    transition: none;
  }
}
</final>