.page-faq {
  --faq-gap: clamp(28px, 5vw, 62px);
  background: var(--night);
  color: var(--snow);
  overflow-x: clip;
}

.page-faq img {
  max-width: 100%;
  height: auto;
}

/* ---------- 页头氛围 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  border-bottom: var(--edge);
  background: var(--ink);
}

.page-faq .faq-hero__media {
  position: absolute;
  inset: 0;
}

.page-faq .faq-hero__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 62%;
  opacity: .46;
  filter: saturate(.72);
}

.page-faq .faq-hero__scrim {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(5, 11, 22, .52) 0%, rgba(11, 27, 51, .88) 56%, var(--night) 100%),
    repeating-linear-gradient(90deg, rgba(46, 125, 209, .10) 0 1px, transparent 1px 104px);
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  gap: 18px;
  max-width: 820px;
  padding-block: clamp(62px, 13vw, 138px) clamp(30px, 5vw, 56px);
}

.page-faq .faq-hero .breadcrumb {
  margin: 0;
}

.page-faq .faq-hero h1 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(28px, 5.2vw, 54px);
  line-height: 1.14;
  letter-spacing: -.02em;
  color: var(--snow);
  text-wrap: balance;
}

.page-faq .faq-hero .lede {
  margin: 0;
  max-width: 66ch;
  color: var(--dust);
  font-size: 16.5px;
  line-height: 1.8;
}

.page-faq .faq-hero__chips {
  list-style: none;
  margin: 6px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* ---------- 主体骨架 ---------- */
.page-faq .faq-shell {
  display: grid;
  gap: var(--faq-gap);
  padding-block: clamp(38px, 7vw, 82px) clamp(56px, 9vw, 112px);
}

/* ---------- 分类索引 ---------- */
.page-faq .faq-index {
  border-top: 2px solid var(--line);
  padding-top: 18px;
}

.page-faq .faq-index__title {
  margin: 0 0 14px;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--dust);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px 8px;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 10px;
  border-left: 2px solid var(--line);
  color: var(--dust);
  font-size: 14.5px;
  line-height: 1.4;
  text-decoration: none;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-faq .faq-index__link .mono {
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--blue);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--snow);
  border-left-color: var(--blue);
  background: rgba(46, 125, 209, .10);
}

.page-faq .faq-index__link[data-active] {
  color: var(--snow);
  border-left-color: var(--yellow);
  background: rgba(46, 125, 209, .14);
}

.page-faq .faq-index__fig {
  margin: 22px 0 0;
  border: var(--edge);
  background: var(--night-2);
  box-shadow: var(--hard);
  overflow: hidden;
}

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

/* ---------- 问答组 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: clamp(38px, 6vw, 72px);
  min-width: 0;
}

.page-faq .faq-group {
  --accent: var(--blue);
  position: relative;
  border-top: 2px solid var(--line);
  padding-top: clamp(20px, 3vw, 30px);
  scroll-margin-top: 96px;
  min-width: 0;
}

.page-faq .faq-group::after {
  content: "";
  position: absolute;
  top: -2px;
  left: 0;
  width: 76px;
  height: 2px;
  background: var(--accent);
}

.page-faq .faq-body > .faq-group:nth-child(2) { --accent: var(--red); }
.page-faq .faq-body > .faq-group:nth-child(3) { --accent: var(--green); }
.page-faq .faq-body > .faq-group:nth-child(4) { --accent: var(--yellow); }
.page-faq .faq-body > .faq-group:nth-child(5) { --accent: var(--blue); }

.page-faq .faq-group__head {
  display: grid;
  gap: 8px;
  margin-bottom: clamp(14px, 2.4vw, 24px);
}

.page-faq .faq-group__num {
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--accent);
}

.page-faq .faq-group h2 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(20px, 2.6vw, 28px);
  line-height: 1.28;
  letter-spacing: -.015em;
  color: var(--snow);
}

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

/* ---------- 折叠问答 ---------- */
.page-faq .faq-list {
  border-top: 1px solid var(--line);
}

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

.page-faq .faq-item__q {
  position: relative;
  display: block;
  list-style: none;
  cursor: pointer;
  padding: 16px 46px 16px 2px;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 16.5px;
  line-height: 1.55;
  color: var(--snow);
  transition: color var(--dur) var(--ease);
}

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

.page-faq .faq-item__q::after {
  content: "";
  position: absolute;
  right: 18px;
  top: 50%;
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--dust);
  border-bottom: 2px solid var(--dust);
  transform: translateY(-72%) rotate(45deg);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-item__q:hover,
.page-faq .faq-item__q:focus-visible {
  color: var(--blue);
}

.page-faq .faq-item[open] .faq-item__q::after {
  transform: translateY(-28%) rotate(225deg);
  border-color: var(--accent);
}

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

.page-faq .faq-item__a {
  padding: 0 46px 20px 2px;
  color: var(--dust);
  font-size: 15.5px;
  line-height: 1.8;
}

.page-faq .faq-item__a p {
  margin: 0;
  max-width: 72ch;
}

.page-faq .faq-item__a p + p {
  margin-top: 10px;
}

.page-faq .faq-item__a a {
  color: var(--blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-item[open] .faq-item__a {
  animation: faq-panel-in .24s var(--ease);
}

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

/* ---------- 联系收尾块 ---------- */
.page-faq .faq-group--contact {
  --accent: var(--red);
  border: var(--edge);
  border-top: var(--edge);
  background: var(--night-2);
  padding: clamp(20px, 3vw, 34px) clamp(18px, 3vw, 34px) clamp(10px, 1.6vw, 18px);
  box-shadow: var(--hard);
}

.page-faq .faq-group--contact::after {
  top: -2px;
  left: -2px;
  width: 92px;
}

.page-faq .faq-contact-line {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 24px;
  margin: 18px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 13.5px;
  letter-spacing: .04em;
  color: var(--snow);
}

/* ---------- 平板与桌面 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-item__q {
    font-size: 17px;
    padding: 18px 52px 18px 2px;
  }

  .page-faq .faq-item__a {
    padding: 0 52px 22px 2px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-shell {
    grid-template-columns: minmax(180px, 22%) minmax(0, 1fr);
    align-items: start;
    gap: clamp(40px, 5vw, 76px);
  }

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

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

  .page-faq .faq-body {
    gap: clamp(46px, 5vw, 78px);
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-hero__inner {
    padding-block: 150px 62px;
  }
}

/* ---------- 窄屏收口 ---------- */
@media (max-width: 480px) {
  .page-faq .faq-index__list {
    grid-template-columns: 1fr;
  }

  .page-faq .faq-item__q {
    padding-right: 34px;
  }

  .page-faq .faq-item__a {
    padding-right: 10px;
  }

  .page-faq .faq-item__q::after {
    right: 10px;
  }

  .page-faq .faq-group--contact {
    padding-inline: 16px;
  }

  .page-faq .faq-contact-line {
    gap: 4px 16px;
    font-size: 12.5px;
  }
}

/* ---------- 动效收敛 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item[open] .faq-item__a {
    animation: none;
  }

  .page-faq .faq-item__q::after,
  .page-faq .faq-index__link {
    transition: none;
  }
}