/* ===== 答疑中心 /answers/ ===== */

.page-faq {
  --faq-line: rgba(143, 163, 196, .26);
  --faq-line-strong: rgba(143, 163, 196, .45);
  --faq-glow: rgba(34, 211, 238, .28);
  --faq-lime-line: rgba(199, 245, 59, .48);
}

/* ---- 首屏 ---- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(36px, 8vw, 88px) 0 clamp(30px, 5vw, 58px);
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -14%;
  right: -22%;
  width: 72%;
  height: 138%;
  background: linear-gradient(158deg, rgba(34, 211, 238, .30), rgba(34, 211, 238, .05) 52%, transparent 74%);
  transform: rotate(-8deg);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 16% 100%);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(143, 163, 196, .07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(143, 163, 196, .07) 1px, transparent 1px);
  background-size: 52px 52px;
  -webkit-mask-image: linear-gradient(180deg, #000, transparent 86%);
  mask-image: linear-gradient(180deg, #000, transparent 86%);
  pointer-events: none;
}

.page-faq .faq-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 5vw, 44px);
  align-items: end;
}

.page-faq .faq-hero__text .breadcrumb {
  margin-bottom: clamp(20px, 4vw, 34px);
}

.page-faq .faq-hero__text .display {
  margin: 10px 0 18px;
}

.page-faq .faq-hero__text .lede {
  max-width: 34ch;
  color: var(--text-soft);
  margin-bottom: clamp(24px, 4vw, 36px);
}

.page-faq .faq-hero__media {
  position: relative;
  margin: 0;
  border: 1px solid var(--faq-line-strong);
  box-shadow: var(--print-shadow);
  background: var(--night-2);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%, 0 0);
}

.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(.9) contrast(1.05);
}

/* ---- 首屏数据条 ---- */
.page-faq .faq-hero__stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-faq .faq-stat {
  flex: 1 1 130px;
  min-width: 0;
  padding: 14px 16px;
  border: 1px solid var(--faq-line);
  border-left: 3px solid var(--cyan);
  background: rgba(20, 42, 82, .55);
}

.page-faq .faq-stat:nth-child(1) {
  border-left-color: var(--lime);
}

.page-faq .faq-stat__num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 34px;
  font-weight: 700;
  line-height: 1;
  color: var(--paper);
  letter-spacing: -.02em;
}

.page-faq .faq-stat:nth-child(1) .faq-stat__num {
  color: var(--lime);
}

.page-faq .faq-stat__unit {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--cyan);
  margin-left: 4px;
}

.page-faq .faq-stat__label {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--steel);
  letter-spacing: .02em;
}

/* ---- 分类索引条 ---- */
.page-faq .faq-index {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(11, 27, 58, .94);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 10px 0;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-faq .faq-index__list li {
  flex: none;
}

.page-faq .faq-index__list a {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--faq-lime-line);
  color: var(--paper);
  font-size: 13px;
  line-height: 1.3;
  text-decoration: none;
  white-space: nowrap;
  transition: background .25s var(--ease), border-color .25s var(--ease), color .25s var(--ease);
}

.page-faq .faq-index__list a .mono {
  font-size: 11px;
  color: var(--lime);
  letter-spacing: .06em;
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  background: rgba(199, 245, 59, .12);
  border-color: var(--lime);
}

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

/* ---- 分组 ---- */
.page-faq .faq-group {
  padding: clamp(34px, 6vw, 72px) 0;
  border-bottom: 1px solid var(--faq-line);
  scroll-margin-top: 84px;
}

.page-faq .faq-group:nth-of-type(even) {
  background: rgba(20, 42, 82, .34);
}

.page-faq .faq-group__grid {
  display: block;
}

.page-faq .faq-group__head {
  margin-bottom: clamp(22px, 4vw, 32px);
}

.page-faq .faq-group__num {
  display: inline-block;
  margin: 0 0 12px;
  padding: 2px 8px;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--ink);
  background: var(--lime);
}

.page-faq .faq-group__head .display {
  margin: 0 0 12px;
}

.page-faq .faq-group__note {
  margin: 0;
  max-width: 30ch;
  font-size: 13px;
  line-height: 1.8;
  color: var(--steel);
}

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

.page-faq .faq-item {
  position: relative;
  padding-left: 16px;
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  bottom: 10px;
  width: 3px;
  background: var(--faq-line-strong);
  transition: background .3s var(--ease);
}

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

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  padding: 16px 0;
  cursor: pointer;
  list-style: none;
  font-size: clamp(15px, 3.7vw, 17px);
  font-weight: 700;
  line-height: 1.55;
  color: var(--paper);
  transition: color .25s var(--ease);
}

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

.page-faq .faq-item__q:hover {
  color: var(--cyan);
}

.page-faq .faq-item__q:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-faq .faq-item__mark {
  position: relative;
  flex: none;
  width: 18px;
  height: 18px;
  margin-top: 4px;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  transition: transform .3s var(--ease), background .3s var(--ease);
}

.page-faq .faq-item__mark::before {
  left: 0;
  right: 0;
  top: 8px;
  height: 2px;
}

.page-faq .faq-item__mark::after {
  top: 0;
  bottom: 0;
  left: 8px;
  width: 2px;
}

.page-faq .faq-item[open] .faq-item__mark::after {
  transform: scaleY(0);
}

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

.page-faq .faq-item__a {
  padding: 0 0 20px;
  max-width: 60ch;
}

.page-faq .faq-item__a p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--text-soft);
}

.page-faq .faq-item__a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 211, 238, .45);
  transition: border-color .25s var(--ease), color .25s var(--ease);
}

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

/* ---- 配图 ---- */
.page-faq .faq-figure {
  margin: 0 0 clamp(22px, 4vw, 34px);
  border: 1px solid var(--faq-line-strong);
  box-shadow: var(--print-shadow);
  background: var(--night-2);
}

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

.page-faq .faq-figure figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--faq-line);
  font-size: 12px;
  line-height: 1.7;
  color: var(--steel);
  letter-spacing: .02em;
}

/* ---- 底部转人工 ---- */
.page-faq .faq-help {
  position: relative;
  overflow: hidden;
  margin-top: clamp(40px, 7vw, 80px);
  padding: clamp(40px, 8vw, 84px) 0;
  background: linear-gradient(150deg, var(--night) 0%, var(--night-2) 100%);
  border-top: 1px solid rgba(34, 211, 238, .4);
}

.page-faq .faq-help::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--lime) 55%, transparent);
}

.page-faq .faq-help__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 44px);
}

.page-faq .faq-help__text .display {
  margin: 10px 0 16px;
}

.page-faq .faq-help__text p {
  max-width: 44ch;
  margin: 0 0 26px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-soft);
}

.page-faq .faq-help__text a:not(.btn) {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 211, 238, .45);
}

.page-faq .faq-help__text a:not(.btn):hover {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

.page-faq .faq-help__list {
  padding: clamp(20px, 4vw, 30px);
  border: 1px solid var(--faq-line-strong);
  border-left: 3px solid var(--cyan);
  background: rgba(11, 27, 58, .72);
  box-shadow: var(--print-shadow);
}

.page-faq .faq-help__label {
  margin: 0 0 16px;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--lime);
}

.page-faq .faq-help__list ol {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-help__list li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--faq-line);
  font-size: 15px;
  line-height: 1.6;
  color: var(--paper);
}

.page-faq .faq-help__list li:last-child {
  border-bottom: 0;
}

.page-faq .faq-help__list li .mono {
  flex: none;
  font-size: 12px;
  color: var(--cyan);
  letter-spacing: .08em;
}

.page-faq .faq-help__note {
  margin: 18px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--steel);
}

/* ---- 减小动效 ---- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item::before,
  .page-faq .faq-item__mark::before,
  .page-faq .faq-item__mark::after,
  .page-faq .faq-index__list a,
  .page-faq .faq-item__q {
    transition-duration: .12s;
  }
}

/* ---- 平板及以上 ---- */
@media (min-width: 720px) {
  .page-faq .faq-hero__stats {
    gap: 16px;
  }

  .page-faq .faq-help__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    align-items: start;
    column-gap: clamp(32px, 5vw, 64px);
  }
}

/* ---- 桌面端 ---- */
@media (min-width: 960px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    column-gap: clamp(32px, 5vw, 72px);
  }

  .page-faq .faq-hero__media {
    clip-path: polygon(0 0, 100% 0, 100% 84%, 86% 100%, 0 100%);
  }

  .page-faq .faq-hero__stats {
    max-width: 620px;
  }

  .page-faq .faq-group__grid {
    display: grid;
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    column-gap: clamp(40px, 5vw, 88px);
    align-items: start;
  }

  .page-faq .faq-group__head {
    position: sticky;
    top: 92px;
    margin-bottom: 0;
  }

  .page-faq .faq-group__note {
    max-width: 26ch;
  }

  .page-faq .faq-group {
    scroll-margin-top: 96px;
  }

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

  .page-faq .faq-item__a {
    padding-bottom: 24px;
  }

  .page-faq .faq-item__a p {
    font-size: 15px;
  }
}

@media (min-width: 1220px) {
  .page-faq .faq-group__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
  }

  .page-faq .faq-hero__text .display {
    margin-bottom: 22px;
  }
}