.page-faq {
  --faq-rail: 264px;
  --faq-gap: clamp(32px, 5vw, 64px);
  overflow-wrap: break-word;
}

/* ---------- 首屏 ---------- */
.page-faq .tut-hero {
  position: relative;
  padding: clamp(32px, 5vw, 68px) 0 clamp(26px, 4vw, 46px);
  background:
    radial-gradient(120% 92% at 88% 0%, rgba(34, 211, 238, .14), transparent 58%),
    radial-gradient(90% 80% at 4% 14%, rgba(57, 255, 158, .10), transparent 60%);
}

.page-faq .tut-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line), var(--cyan), var(--line), transparent);
  opacity: .7;
}

.page-faq .crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 20px;
  font-size: 12px;
  color: var(--muted);
}

.page-faq .crumbs a {
  color: var(--muted);
  text-decoration: none;
  min-height: 24px;
  display: inline-flex;
  align-items: center;
  transition: color var(--t-fast) var(--ease);
}

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

.page-faq .crumbs__sep {
  color: var(--line);
}

.page-faq .tut-hero__title {
  margin: 10px 0 20px;
  max-width: 22ch;
  font-family: var(--f-display);
  font-weight: 800;
  font-size: clamp(29px, 5.6vw, 56px);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-faq .tut-hero__title em {
  font-style: normal;
  color: var(--accent);
  text-shadow: 0 0 26px rgba(57, 255, 158, .35);
}

.page-faq .tut-hero__lede {
  max-width: 62ch;
  margin: 0 0 30px;
  font-family: var(--f-serif);
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .tut-hero__facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 32px;
}

.page-faq .tut-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 13px;
  color: var(--muted);
}

.page-faq .tut-hero__facts .mono {
  font-size: 20px;
  font-weight: 700;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}

/* ---------- 双栏骨架 ---------- */
.page-faq .tut-layout {
  display: grid;
  gap: var(--faq-gap);
  padding: clamp(34px, 5.5vw, 68px) 0 clamp(52px, 8vw, 92px);
}

.page-faq .tut-rail,
.page-faq .tut-body {
  min-width: 0;
}

/* ---------- 侧栏目录 ---------- */
.page-faq .tut-rail__label {
  margin: 0 0 12px;
}

.page-faq .tut-rail__nav {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 8px;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

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

.page-faq .tut-rail__link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 15px;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-pill);
  background: var(--panel);
  color: var(--ink);
  font-size: 13px;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color var(--t-fast) var(--ease), background var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}

.page-faq .tut-rail__link .mono {
  font-size: 11px;
  color: var(--accent);
  letter-spacing: .06em;
}

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

.page-faq .tut-rail__link:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.page-faq .tut-rail__note {
  margin-top: 22px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: linear-gradient(165deg, var(--panel-soft), var(--panel));
  box-shadow: inset 0 0 24px rgba(57, 255, 158, .06);
}

.page-faq .tut-rail__note p {
  margin: 10px 0 12px;
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .tut-rail__top {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-size: 12.5px;
  color: var(--cyan);
  text-decoration: none;
  transition: color var(--t-fast) var(--ease);
}

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

/* ---------- 正文区块 ---------- */
.page-faq .tut-block + .tut-block {
  margin-top: clamp(48px, 8vw, 92px);
}

.page-faq .tut-block__head {
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-faq .tut-block__title {
  margin: 8px 0 14px;
  padding-left: 16px;
  border-left: 3px solid var(--accent);
  font-family: var(--f-display);
  font-weight: 800;
  font-size: clamp(22px, 3.3vw, 35px);
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-faq .tut-block__intro {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .tut-copy {
  margin: 0 0 14px;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .tut-copy a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 211, 238, .4);
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.page-faq .tut-copy a:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.page-faq .tut-copy--tail {
  margin-top: 26px;
  padding-top: 20px;
  border-top: 1px solid var(--line-soft);
}

/* ---------- 三步流程 ---------- */
.page-faq .tut-steps {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .tut-step {
  position: relative;
  padding: 0 0 30px 46px;
}

.page-faq .tut-step:last-child {
  padding-bottom: 0;
}

.page-faq .tut-step::before {
  content: "";
  position: absolute;
  left: 13px;
  top: 30px;
  bottom: 2px;
  width: 1px;
  background: linear-gradient(180deg, var(--line), var(--line-soft));
}

.page-faq .tut-step:last-child::before {
  display: none;
}

.page-faq .tut-step__num {
  position: absolute;
  left: 0;
  top: 0;
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border: 1px solid var(--accent);
  border-radius: 50%;
  background: var(--bg);
  color: var(--accent);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0;
}

.page-faq .tut-step__title {
  margin: 2px 0 8px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--ink);
}

.page-faq .tut-step p {
  margin: 0;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 收藏栏去处 ---------- */
.page-faq .tut-dest {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-faq .tut-dest__item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: linear-gradient(160deg, var(--panel-soft), var(--panel));
  box-shadow: inset 0 0 22px rgba(57, 255, 158, .05);
  transition: border-color var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
}

.page-faq .tut-dest__item:hover {
  border-color: var(--cyan);
  transform: translateY(-2px);
}

.page-faq .tut-dest__tag {
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--accent);
}

.page-faq .tut-dest__item h3 {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.page-faq .tut-dest__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .tut-dest__link {
  margin-top: auto;
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 44px;
  font-size: 13px;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.page-faq .tut-dest__link::after {
  content: "→";
  font-family: var(--f-mono);
}

.page-faq .tut-dest__link:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.page-faq .tut-dest__link:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* ---------- 图片 ---------- */
.page-faq .tut-figure {
  margin: 0 0 24px;
}

.page-faq .tut-shot {
  aspect-ratio: 3 / 2;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--panel);
  box-shadow: inset 0 0 30px rgba(34, 211, 238, .06);
}

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

.page-faq .tut-figure__cap {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 版本卡 ---------- */
.page-faq .tut-version {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 22px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--alert);
  border-radius: var(--r-md);
  background: var(--panel);
}

.page-faq .tut-version p {
  margin: 0;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 图文并排 ---------- */
.page-faq .tut-split {
  display: grid;
  gap: 24px;
}

.page-faq .tut-split .tut-figure {
  margin-bottom: 0;
}

.page-faq .tut-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-faq .tut-list li {
  position: relative;
  padding-left: 20px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .tut-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--accent);
  transform: rotate(45deg);
}

.page-faq .tut-list strong {
  color: var(--ink);
  font-weight: 600;
}

/* ---------- 问答手风琴 ---------- */
.page-faq .tut-qa {
  border-top: 1px solid var(--line-soft);
}

.page-faq .tut-qa__item {
  border-bottom: 1px solid var(--line-soft);
  border-left: 2px solid transparent;
  transition: background var(--t-base) var(--ease), border-color var(--t-base) var(--ease);
}

.page-faq .tut-qa__item[open] {
  border-left-color: var(--accent);
  background: linear-gradient(90deg, rgba(57, 255, 158, .08), rgba(57, 255, 158, 0) 72%);
}

.page-faq .tut-qa__q {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  min-height: 44px;
  padding: 18px 16px;
  cursor: pointer;
  list-style: none;
  transition: background var(--t-fast) var(--ease);
}

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

.page-faq .tut-qa__q:hover {
  background: rgba(34, 211, 238, .07);
}

.page-faq .tut-qa__q:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}

.page-faq .tut-qa__num {
  flex: 0 0 auto;
  padding-top: 3px;
  font-size: 13px;
  font-weight: 700;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  transition: color var(--t-fast) var(--ease);
}

.page-faq .tut-qa__item[open] .tut-qa__num {
  color: var(--accent);
}

.page-faq .tut-qa__text {
  flex: 1 1 auto;
  min-width: 0;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.65;
  color: var(--ink);
}

.page-faq .tut-qa__chev {
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  margin: 8px 2px 0 auto;
  border-right: 1.5px solid var(--cyan);
  border-bottom: 1.5px solid var(--cyan);
  transform: rotate(45deg);
  transition: transform var(--t-base) var(--ease);
}

.page-faq .tut-qa__item[open] .tut-qa__chev {
  transform: rotate(-135deg);
}

.page-faq .tut-qa__a {
  max-width: 66ch;
  padding: 0 16px 22px 53px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--muted);
}

/* ---------- 中屏 ---------- */
@media (min-width: 720px) {
  .page-faq .tut-dest {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

  .page-faq .tut-version {
    flex-direction: row;
    align-items: center;
    gap: 18px;
  }

  .page-faq .tut-version .pill {
    flex: 0 0 auto;
  }

  .page-faq .tut-qa__q {
    padding: 20px 20px;
  }

  .page-faq .tut-qa__a {
    padding: 0 20px 24px 57px;
  }
}

/* ---------- 大屏：左窄右宽常驻双栏 ---------- */
@media (min-width: 1000px) {
  .page-faq .tut-layout {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: var(--faq-gap);
    align-items: start;
  }

  .page-faq .tut-rail {
    position: sticky;
    top: 104px;
  }

  .page-faq .tut-rail__label {
    margin-bottom: 14px;
  }

  .page-faq .tut-rail__nav {
    display: block;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .tut-rail__link {
    display: flex;
    align-items: center;
    width: 100%;
    min-height: 44px;
    padding: 10px 0 10px 16px;
    border: 0;
    border-left: 2px solid var(--line-soft);
    border-radius: 0;
    background: transparent;
    white-space: normal;
    line-height: 1.45;
  }

  .page-faq .tut-rail__link + .tut-rail__link {
    margin-top: 2px;
  }

  .page-faq .tut-rail__link:hover {
    background: transparent;
    border-left-color: var(--cyan);
    color: var(--cyan);
  }

  .page-faq .tut-block__title {
    padding-left: 20px;
  }

  .page-faq .tut-split {
    grid-template-columns: minmax(0, 1fr) minmax(0, .92fr);
    gap: 36px;
    align-items: start;
  }

  .page-faq .tut-figure {
    margin-bottom: 28px;
  }
}

/* ---------- 动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    transition-duration: 1ms !important;
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
  }
}