.page-faq {
  --faq-answer: #16264A;
  --faq-accent: var(--ob-mint);
  display: block;
  background: var(--ob-deep);
}

.page-faq .figure {
  margin: 0;
}

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

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 4vw, 46px) 0 clamp(40px, 6vw, 78px);
  background:
    radial-gradient(110% 80% at 86% 0%, rgba(23, 242, 196, .16), transparent 62%),
    radial-gradient(90% 70% at 8% 100%, rgba(255, 139, 61, .12), transparent 60%),
    linear-gradient(158deg, #1B3C7A 0%, #0F1B38 48%, #070E22 100%);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--ob-mint), rgba(23, 242, 196, .1) 55%, var(--ob-orange));
  opacity: .5;
}

.page-faq .faq-hero .breadcrumb {
  margin-bottom: clamp(20px, 4vw, 42px);
}

.page-faq .faq-hero__inner {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  align-items: center;
}

.page-faq .faq-hero h1 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.85rem, 5.4vw, 3.5rem);
  line-height: 1.1;
  letter-spacing: -.01em;
  color: var(--ob-fog);
}

.page-faq .faq-hero__lead {
  margin: 20px 0 0;
  max-width: 34em;
  font-size: 1.02rem;
  line-height: 1.9;
  color: var(--ob-silver);
}

.page-faq .faq-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 34px;
  margin: 28px 0 0;
  padding: 22px 0 0;
  list-style: none;
  border-top: 1px solid var(--ob-line);
}

.page-faq .faq-fact {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.page-faq .faq-fact__num {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--ob-mint);
}

.page-faq .faq-fact__label {
  font-size: .78rem;
  line-height: 1.5;
  color: var(--ob-silver);
}

.page-faq .faq-hero__figure .figure__media {
  aspect-ratio: 16 / 9;
  min-height: 190px;
}

/* ---------- 分类索引条 ---------- */
.page-faq .faq-index {
  background: rgba(15, 27, 56, .78);
  border-bottom: 1px solid var(--ob-line);
}

.page-faq .faq-index__inner {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-top: 14px;
  padding-bottom: 14px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-index__label {
  flex: 0 0 auto;
  padding-right: 12px;
  margin-right: 4px;
  border-right: 1px solid var(--ob-line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--ob-silver);
  text-transform: uppercase;
}

.page-faq .faq-index__link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 15px;
  border: 1px solid var(--ob-line);
  border-radius: 999px;
  background: rgba(7, 14, 34, .7);
  color: var(--ob-silver);
  font-size: .82rem;
  line-height: 1;
  white-space: nowrap;
  text-decoration: none;
  transition: border-color .2s var(--ob-ease), color .2s var(--ob-ease), background .2s var(--ob-ease);
}

.page-faq .faq-index__link .num {
  font-family: var(--font-mono);
  font-size: .72rem;
  color: var(--ob-mint);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  border-color: var(--ob-mint);
  color: var(--ob-fog);
  background: rgba(23, 242, 196, .1);
}

/* ---------- 章节骨架 ---------- */
.page-faq .faq-block {
  scroll-margin-top: 96px;
  padding: clamp(42px, 6vw, 86px) 0;
  border-bottom: 1px solid var(--ob-line);
}

.page-faq .faq-block:last-child {
  border-bottom: 0;
  padding-bottom: clamp(52px, 7vw, 100px);
}

.page-faq .faq-block--orange {
  --faq-accent: var(--ob-orange);
}

.page-faq .faq-block__inner {
  display: grid;
  gap: clamp(22px, 3vw, 40px);
}

.page-faq .faq-block__head .section-no {
  display: block;
  margin-bottom: 14px;
  font-family: var(--font-display);
  font-weight: 200;
  line-height: .82;
}

.page-faq .faq-block__head .section-title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.4rem, 2.6vw, 1.95rem);
  line-height: 1.24;
  color: var(--ob-fog);
}

.page-faq .faq-block__note {
  margin: 14px 0 0;
  max-width: 26em;
  font-size: .88rem;
  line-height: 1.8;
  color: var(--ob-silver);
}

.page-faq .faq-block__list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* ---------- 问答条目 ---------- */
.page-faq .faq-item {
  border: 2px solid var(--ob-line);
  border-radius: var(--ob-radius);
  background: var(--ob-panel);
  overflow: hidden;
  transition: border-color .22s var(--ob-ease), box-shadow .22s var(--ob-ease);
}

.page-faq .faq-item[open] {
  border-color: var(--faq-accent);
  box-shadow: var(--ob-shadow);
}

@media (hover: hover) {
  .page-faq .faq-item:hover:not([open]) {
    border-color: rgba(154, 169, 194, .55);
  }
}

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 17px 18px;
  list-style: none;
  cursor: pointer;
  color: var(--ob-fog);
  font-size: .97rem;
  font-weight: 500;
  line-height: 1.6;
}

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

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

.page-faq .faq-item__no {
  flex: 0 0 auto;
  padding-top: .3em;
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .1em;
  color: var(--ob-silver);
  transition: color .2s var(--ob-ease);
}

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

.page-faq .faq-item__mark {
  position: relative;
  flex: 0 0 22px;
  width: 22px;
  height: 22px;
  margin-top: 1px;
  border: 1px solid var(--ob-line);
  border-radius: 6px;
  transition: border-color .2s var(--ob-ease);
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--faq-accent);
  transform: translate(-50%, -50%);
}

.page-faq .faq-item__mark::before {
  width: 10px;
  height: 2px;
}

.page-faq .faq-item__mark::after {
  width: 2px;
  height: 10px;
  transition: transform .22s var(--ob-ease), opacity .22s var(--ob-ease);
}

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

.page-faq .faq-item[open] .faq-item__mark {
  border-color: var(--faq-accent);
}

.page-faq .faq-item[open] .faq-item__mark::after {
  transform: translate(-50%, -50%) scaleY(0);
  opacity: 0;
}

.page-faq .faq-item__body {
  padding: 20px 18px 26px;
  background: var(--faq-answer);
  border-top: 1px solid var(--ob-line);
}

.page-faq .faq-item__p {
  margin: 0;
  max-width: 40em;
  font-size: .93rem;
  line-height: 1.95;
  color: var(--ob-silver);
}

.page-faq .faq-item__p + .faq-item__p {
  margin-top: 12px;
}

.page-faq .faq-item__p a {
  color: var(--ob-mint);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 末章联系区 ---------- */
.page-faq .faq-help__grid {
  display: grid;
  gap: clamp(22px, 3vw, 38px);
}

.page-faq .faq-help__channels {
  display: grid;
  gap: 12px;
  margin-top: 22px;
}

.page-faq .faq-channel {
  padding: 16px 18px;
  border: 2px solid var(--ob-line);
  border-radius: var(--ob-radius-sm);
  background: var(--ob-panel);
}

.page-faq .faq-channel__label {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--ob-amber);
}

.page-faq .faq-channel__value {
  display: block;
  font-family: var(--font-mono);
  font-size: .98rem;
  letter-spacing: .01em;
  color: var(--ob-fog);
  word-break: break-all;
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-faq .faq-help__figure .figure__media {
  aspect-ratio: 16 / 9;
  min-height: 200px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-faq .faq-hero__facts {
    gap: 18px 44px;
  }

  .page-faq .faq-help__channels {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-item__q {
    padding: 19px 22px;
    font-size: 1rem;
  }

  .page-faq .faq-item__body {
    padding: 22px 22px 28px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  }

  .page-faq .faq-hero__figure .figure__media {
    aspect-ratio: 14 / 5;
  }

  .page-faq .faq-help__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, .82fr);
    align-items: start;
  }
}

@media (min-width: 940px) {
  .page-faq .faq-block__inner {
    grid-template-columns: minmax(170px, 220px) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 60px);
  }

  .page-faq .faq-block__head {
    position: sticky;
    top: 104px;
    align-self: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-item__mark,
  .page-faq .faq-item__mark::after,
  .page-faq .faq-item__no,
  .page-faq .faq-index__link {
    transition: none;
  }
}