.page-faq {
  --faq-ink-soft: rgba(242, 247, 244, .8);
  --faq-accent: var(--c-cyan);
  padding-bottom: clamp(56px, 7vw, 96px);
}

@media (prefers-reduced-motion: no-preference) {
  .page-faq {
    scroll-behavior: smooth;
  }
}

.page-faq .crumbs {
  padding-top: clamp(20px, 2.6vw, 34px);
}

/* ---------- 顶部 ---------- */

.page-faq .faq-hero {
  padding-top: clamp(22px, 3vw, 40px);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(22px, 3vw, 34px);
}

.page-faq .faq-hero__title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2rem, 4.8vw, 3.4rem);
  line-height: 1.08;
  letter-spacing: -.01em;
  color: var(--c-white);
}

.page-faq .faq-hero__lede {
  margin: 0 0 18px;
  max-width: 46ch;
  font-size: 1.02rem;
  line-height: 1.75;
  color: var(--faq-ink-soft);
}

.page-faq .faq-hero__jump {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-size: .9rem;
  color: var(--c-muted);
}

.page-faq .faq-hero__jump a {
  color: var(--faq-accent);
  text-decoration: none;
}

.page-faq .faq-hero__figure {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--c-slate);
  aspect-ratio: 16 / 9;
}

.page-faq .faq-hero__figure img,
.page-faq .faq-start__figure img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

@media (min-width: 1024px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: center;
    gap: clamp(32px, 4.4vw, 68px);
  }

  .page-faq .faq-hero__figure {
    aspect-ratio: 16 / 7;
  }
}

/* ---------- 三步上手 ---------- */

.page-faq .faq-start {
  padding-top: clamp(44px, 6vw, 76px);
}

.page-faq .faq-start__head {
  max-width: 62ch;
  margin-bottom: clamp(26px, 3.4vw, 42px);
}

.page-faq .faq-start__title {
  margin: 0 0 10px;
  font-size: clamp(1.4rem, 2.8vw, 2.1rem);
  line-height: 1.25;
  color: var(--c-white);
}

.page-faq .faq-start__note {
  margin: 0;
  font-size: .9rem;
  color: var(--c-muted);
}

.page-faq .start-steps {
  list-style: none;
  margin: 0 0 clamp(28px, 3.6vw, 46px);
  padding: 0;
  display: grid;
  gap: 18px;
  counter-reset: step;
}

.page-faq .start-steps__item {
  position: relative;
  padding: 22px 22px 24px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(180deg, rgba(28, 43, 39, .72) 0%, rgba(16, 19, 20, .72) 100%);
}

.page-faq .start-steps__num {
  display: block;
  margin-bottom: 12px;
  font-size: .82rem;
  letter-spacing: .12em;
  color: var(--faq-accent);
}

.page-faq .start-steps__name {
  margin: 0 0 8px;
  font-size: 1.08rem;
  color: var(--c-white);
}

.page-faq .start-steps__text {
  margin: 0;
  font-size: .95rem;
  line-height: 1.75;
  color: var(--faq-ink-soft);
}

@media (min-width: 768px) {
  .page-faq .start-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0;
  }

  .page-faq .start-steps__item {
    border: none;
    border-radius: 0;
    background: none;
    padding: 0 clamp(16px, 2vw, 32px) 0 0;
  }

  .page-faq .start-steps__item + .start-steps__item {
    padding-left: clamp(18px, 2.2vw, 34px);
  }

  .page-faq .start-steps__item + .start-steps__item::before {
    content: "";
    position: absolute;
    left: 0;
    top: 4px;
    bottom: 6px;
    width: 1px;
    background: var(--line);
  }

  .page-faq .start-steps__item::after {
    content: "";
    position: absolute;
    left: 0;
    right: clamp(16px, 2vw, 32px);
    bottom: -6px;
    height: 2px;
    background: linear-gradient(90deg, var(--faq-accent) 0%, rgba(43, 227, 176, 0) 100%);
  }

  .page-faq .start-steps__item + .start-steps__item::after {
    left: clamp(18px, 2.2vw, 34px);
  }
}

.page-faq .faq-start__figure {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--c-slate);
  aspect-ratio: 12 / 5;
}

/* ---------- 问答主体 ---------- */

.page-faq .faq-body {
  padding-top: clamp(48px, 6vw, 82px);
}

.page-faq .faq-body__grid {
  display: grid;
  gap: clamp(26px, 3.4vw, 44px);
}

/* 索引 */

.page-faq .faq-index__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--c-muted);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-index__link {
  display: block;
  white-space: nowrap;
  padding: 8px 15px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  font-size: .86rem;
  color: var(--c-muted);
  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:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--c-white);
  border-color: var(--faq-accent);
  background: rgba(43, 227, 176, .08);
}

@media (min-width: 1024px) {
  .page-faq .faq-body__grid {
    grid-template-columns: 232px minmax(0, 1fr);
    gap: clamp(40px, 5.4vw, 88px);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 96px;
  }

  .page-faq .faq-index__title {
    margin-bottom: 18px;
  }

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

  .page-faq .faq-index__link {
    position: relative;
    padding: 10px 0 10px 16px;
    border: none;
    border-radius: 0;
    background: none;
    font-size: .95rem;
  }

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    background: none;
    color: var(--c-white);
  }

  .page-faq .faq-index__link::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    width: 2px;
    height: 17px;
    border-radius: 2px;
    background: var(--faq-accent);
    transform: translateY(-50%) scaleY(0);
    transform-origin: center;
    transition: transform var(--dur) var(--ease);
  }

  .page-faq .faq-index__link:hover::before,
  .page-faq .faq-index__link:focus-visible::before {
    transform: translateY(-50%) scaleY(1);
  }
}

/* 分组 */

.page-faq .faq-group,
.page-faq .faq-item {
  scroll-margin-top: 104px;
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(44px, 5.6vw, 78px);
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 14px;
  margin-bottom: 6px;
  border-bottom: 1px solid var(--line-strong);
}

.page-faq .faq-group__no {
  font-size: .76rem;
  letter-spacing: .12em;
  color: var(--faq-accent);
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(1.16rem, 2.3vw, 1.55rem);
  line-height: 1.3;
  color: var(--c-white);
}

/* 折叠条目 */

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

.page-faq .faq-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 16px;
  bottom: 16px;
  width: 3px;
  border-radius: 3px;
  background: var(--faq-accent);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--dur) var(--ease);
}

.page-faq .faq-item[open] {
  padding-left: 18px;
}

.page-faq .faq-item[open]::before {
  transform: scaleY(1);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 0;
  cursor: pointer;
  list-style: none;
  font-size: 1.02rem;
  line-height: 1.6;
  color: var(--c-white);
  transition: color var(--dur) var(--ease);
}

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

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

.page-faq .faq-item__q:focus-visible {
  outline: 2px solid var(--faq-accent);
  outline-offset: 4px;
  border-radius: var(--r-md);
}

.page-faq .faq-item__mark {
  position: relative;
  flex: none;
  width: 22px;
  height: 22px;
  margin-top: 3px;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  transition: border-color var(--dur) var(--ease);
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  left: 5px;
  right: 5px;
  top: 50%;
  height: 1.5px;
  margin-top: -.75px;
  background: var(--c-muted);
  transition: background-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-faq .faq-item__mark::after {
  transform: rotate(90deg);
}

.page-faq .faq-item__q:hover .faq-item__mark {
  border-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::before,
.page-faq .faq-item[open] .faq-item__mark::after {
  background: var(--faq-accent);
}

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

.page-faq .faq-item__a {
  padding: 0 34px 22px 0;
  font-size: .96rem;
  line-height: 1.8;
  color: var(--faq-ink-soft);
}

.page-faq .faq-item__a p {
  margin: 0 0 10px;
}

.page-faq .faq-item__a p:last-child {
  margin-bottom: 0;
}

.page-faq .faq-item__a a {
  color: var(--faq-accent);
  text-decoration: none;
}

/* ---------- 收尾 ---------- */

.page-faq .faq-help {
  padding-top: clamp(52px, 6.6vw, 92px);
}

.page-faq .faq-help__panel {
  display: grid;
  gap: clamp(26px, 3.4vw, 44px);
  padding: clamp(26px, 3.6vw, 46px);
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  background:
    radial-gradient(120% 140% at 0% 0%, rgba(22, 69, 58, .55) 0%, rgba(16, 19, 20, .9) 62%),
    var(--c-carbon);
}

.page-faq .faq-help__title {
  margin: 0 0 12px;
  font-size: clamp(1.4rem, 2.8vw, 2rem);
  line-height: 1.25;
  color: var(--c-white);
}

.page-faq .faq-help__text {
  margin: 0 0 22px;
  max-width: 48ch;
  font-size: .96rem;
  line-height: 1.8;
  color: var(--faq-ink-soft);
}

.page-faq .faq-help__scope {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  align-content: start;
}

.page-faq .faq-help__scope-item {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 13px 0;
  border-bottom: 1px dashed var(--line);
  font-size: .93rem;
  line-height: 1.65;
  color: var(--faq-ink-soft);
}

.page-faq .faq-help__scope-item:first-child {
  border-top: 1px dashed var(--line);
}

.page-faq .faq-help__scope-no {
  flex: none;
  font-size: .74rem;
  letter-spacing: .12em;
  color: var(--c-amber);
}

@media (min-width: 900px) {
  .page-faq .faq-help__panel {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: clamp(36px, 5vw, 72px);
    align-items: center;
  }
}
</main>