.page-faq {
  --faq-cyan-soft: rgba(53, 227, 198, .30);
  --faq-cyan-faint: rgba(53, 227, 198, .07);
  --faq-orange-faint: rgba(255, 106, 43, .12);
  display: block;
  color: var(--c-bone);
  padding-bottom: clamp(40px, 7vw, 88px);
}

.page-faq .page-faq__crumb {
  max-width: var(--wrap);
  margin-inline: auto;
  padding: 16px var(--edge) 0;
}

/* ---------- 首屏框景 ---------- */
.page-faq .faq-hero {
  padding: clamp(18px, 3vw, 34px) 0 clamp(8px, 2vw, 18px);
}

.page-faq .faq-hero__frame {
  position: relative;
  padding: clamp(26px, 4.5vw, 54px) clamp(18px, 3.5vw, 46px) clamp(30px, 4vw, 48px);
  border-radius: var(--r-lg);
  background:
    radial-gradient(140% 120% at 92% -10%, rgba(53, 227, 198, .10) 0%, transparent 58%),
    linear-gradient(168deg, rgba(20, 28, 49, .92) 0%, rgba(10, 16, 32, .96) 72%);
  border: 1px solid var(--line);
  overflow: hidden;
}

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  max-width: 17ch;
}

.page-faq .faq-hero__lede {
  margin-top: 20px;
  max-width: 60ch;
}

.page-faq .faq-hero__facts {
  list-style: none;
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  border-top: 1px solid var(--line-soft);
  padding-top: 22px;
}

.page-faq .faq-hero__facts .stat__value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(24px, 4.6vw, 34px);
  line-height: 1;
  color: var(--c-cyan);
  letter-spacing: -0.01em;
}

.page-faq .faq-hero__facts .stat__value small {
  font-size: .42em;
  color: var(--c-mist);
  letter-spacing: .06em;
  margin-left: 4px;
}

.page-faq .faq-hero__facts .stat__label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--c-mist);
}

/* ---------- 目录跳转 ---------- */
.page-faq .faq-jump {
  max-width: var(--wrap);
  margin: clamp(20px, 3vw, 32px) auto clamp(24px, 4vw, 44px);
  padding-inline: var(--edge);
}

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

.page-faq .faq-jump__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--glass);
  color: var(--c-bone);
  font-size: 14px;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color .3s ease, background .3s ease, color .3s ease, transform .3s ease;
}

.page-faq .faq-jump__link .num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  color: var(--c-cyan);
}

.page-faq .faq-jump__link:hover {
  border-color: var(--faq-cyan-soft);
  background: var(--glass-strong);
  transform: translateY(-2px);
}

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

/* ---------- 教程条目 ---------- */
.page-faq .faq-flow {
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--edge);
}

.page-faq .tut {
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--glass);
  backdrop-filter: blur(10px);
  transition: border-color .3s ease, background-color .3s ease, box-shadow .3s ease;
}

.page-faq .tut + .tut {
  margin-top: 14px;
}

.page-faq .tut:hover {
  border-color: var(--faq-cyan-soft);
  background: var(--glass-strong);
}

.page-faq .tut[open] {
  background: var(--glass-strong);
  border-color: var(--faq-cyan-soft);
  box-shadow: var(--shadow);
}

.page-faq .tut__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  border-radius: var(--r-lg);
}

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

.page-faq .tut__head:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: -2px;
  box-shadow: 0 0 0 4px rgba(53, 227, 198, .22);
}

.page-faq .tut__no {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 15px;
  letter-spacing: .04em;
  color: var(--c-mist);
  padding: 4px 8px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  transition: color .3s ease, border-color .3s ease;
}

.page-faq .tut[open] .tut__no {
  color: var(--c-cyan);
  border-color: var(--faq-cyan-soft);
}

.page-faq .tut__label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.page-faq .tut__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(17px, 2.4vw, 21px);
  letter-spacing: -0.01em;
  color: var(--c-bone);
}

.page-faq .tut__sub {
  font-size: 13px;
  line-height: 1.6;
  color: var(--c-mist);
  letter-spacing: .02em;
}

.page-faq .tut__chev {
  width: 12px;
  height: 12px;
  border-right: 2px solid var(--c-mist);
  border-bottom: 2px solid var(--c-mist);
  transform: rotate(45deg) translate(-3px, -3px);
  transition: transform .3s ease, border-color .3s ease;
}

.page-faq .tut[open] .tut__chev {
  transform: rotate(-135deg) translate(-3px, -3px);
  border-color: var(--c-cyan);
}

.page-faq .tut__body {
  display: grid;
  gap: 22px;
  padding: 18px 18px 22px;
  border-top: 1px solid var(--line-soft);
}

.page-faq .tut[open] .tut__body {
  animation: faq-unfold .34s ease both;
}

@keyframes faq-unfold {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: none; }
}

.page-faq .tut__lead {
  margin: 0 0 18px;
  padding-left: 14px;
  border-left: 2px solid var(--c-orange);
  font-size: 16px;
  line-height: 1.75;
  color: var(--c-bone);
}

.page-faq .tut__tail {
  margin: 20px 0 14px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-mist);
}

.page-faq .tut__view {
  padding: 12px;
  border-radius: var(--r-md);
  border: 1px solid var(--line-soft);
  background: linear-gradient(158deg, rgba(34, 48, 73, .72) 0%, rgba(10, 16, 32, .9) 80%);
}

.page-faq .tut__view--graph {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 14px;
  padding: 20px 16px;
}

.page-faq .pulse {
  width: 100%;
  height: auto;
  color: var(--c-cyan);
  opacity: .92;
}

.page-faq .tut__note {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-mist);
}

/* ---------- 步骤列表 ---------- */
.page-faq .steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-faq .steps__item {
  position: relative;
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 14px;
}

.page-faq .steps__item:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 16px;
  top: 40px;
  bottom: -18px;
  width: 1px;
  background: linear-gradient(180deg, var(--line), transparent);
}

.page-faq .steps__no {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 14px;
  color: var(--c-cyan);
  border: 1px solid var(--faq-cyan-soft);
  background: var(--faq-cyan-faint);
}

.page-faq .steps__title {
  margin: 6px 0 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: -0.005em;
  color: var(--c-bone);
}

.page-faq .steps__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-mist);
  max-width: 62ch;
}

/* ---------- 版本三卡 ---------- */
.page-faq .ver-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 6px;
}

.page-faq .ver-card {
  padding: 20px 18px;
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  background: rgba(34, 48, 73, .48);
}

.page-faq .ver-card--accent {
  border-color: var(--faq-cyan-soft);
  background: linear-gradient(160deg, var(--faq-cyan-faint), rgba(34, 48, 73, .55));
}

.page-faq .ver-card__name {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 20px;
  letter-spacing: -0.015em;
  color: var(--c-bone);
}

.page-faq .ver-card__for {
  margin: 8px 0 12px;
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--c-bone);
  background: var(--faq-orange-faint);
  border: 1px solid rgba(255, 106, 43, .34);
}

.page-faq .ver-card__body {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--c-mist);
}

/* ---------- 图片 ---------- */
.page-faq .media {
  margin: 0;
}

.page-faq .media__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--r-md);
  border: 1px solid var(--line-soft);
  background: var(--c-night);
}

.page-faq .media__caption {
  display: block;
  margin-top: 10px;
  color: var(--c-mist);
}

/* ---------- 收束与回顶 ---------- */
.page-faq .faq-end {
  margin-top: clamp(38px, 6vw, 72px);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
  background:
    linear-gradient(180deg, rgba(5, 8, 15, .84) 0%, rgba(10, 16, 32, .9) 100%);
}

.page-faq .faq-end__inner {
  padding-block: clamp(32px, 5vw, 58px);
}

.page-faq .faq-end__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 4vw, 34px);
  letter-spacing: -0.02em;
  color: var(--c-bone);
}

.page-faq .faq-end__text {
  margin: 16px 0 26px;
  max-width: 58ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--c-mist);
}

.page-faq .faq-end__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-faq .faq-back {
  max-width: var(--wrap);
  margin-inline: auto;
  padding: 24px var(--edge) 0;
}

.page-faq .faq-back__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--c-mist);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  padding-bottom: 3px;
  transition: color .3s ease, border-color .3s ease;
}

.page-faq .faq-back__link::before {
  content: "↑";
  color: var(--c-cyan);
}

.page-faq .faq-back__link:hover {
  color: var(--c-bone);
  border-color: var(--faq-cyan-soft);
}

.page-faq .faq-back__link:focus-visible,
.page-faq .btn:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: 3px;
  box-shadow: 0 0 0 4px rgba(53, 227, 198, .22);
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-hero__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }

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

  .page-faq .tut__head {
    padding: 20px 24px;
  }

  .page-faq .tut__body {
    padding: 22px 24px 28px;
  }
}

@media (min-width: 900px) {
  .page-faq .tut__body {
    grid-template-columns: minmax(0, 1fr) minmax(0, 380px);
    gap: 34px;
    padding: 26px 30px 32px;
  }

  .page-faq .tut__body--wide {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-faq .ver-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .tut__view {
    padding: 16px;
  }
}

@media (min-width: 1080px) {
  .page-faq .faq-hero__title {
    font-size: clamp(40px, 4.6vw, 60px);
  }

  .page-faq .tut__body {
    grid-template-columns: minmax(0, 1fr) minmax(0, 420px);
  }
}

@media (max-width: 420px) {
  .page-faq .tut__head {
    grid-template-columns: auto minmax(0, 1fr);
    row-gap: 10px;
  }

  .page-faq .tut__chev {
    grid-column: 2;
    justify-self: end;
  }

  .page-faq .steps__desc,
  .page-faq .ver-card__body {
    font-size: 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .tut,
  .page-faq .tut__chev,
  .page-faq .faq-jump__link,
  .page-faq .faq-back__link {
    transition: none;
  }

  .page-faq .tut[open] .tut__body {
    animation: none;
  }

  .page-faq .faq-jump__link:hover {
    transform: none;
  }
}