.page-faq {
  display: block;
  --faq-rail: 104px;
}

/* ---------- 首屏框景 ---------- */
.page-faq .faq-head {
  padding-top: 26px;
  padding-bottom: 0;
}

.page-faq .faq-head__frame {
  position: relative;
  padding: 24px 20px 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background:
    radial-gradient(90% 130% at 92% 0%, rgba(46, 125, 255, 0.22), transparent 62%),
    radial-gradient(85% 120% at 2% 100%, rgba(255, 122, 69, 0.14), transparent 58%),
    var(--ink-800);
}

.page-faq .faq-head__frame::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg, var(--orange), var(--blue) 42%, var(--cyan) 78%, transparent);
}

.page-faq .faq-head__frame::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 6px;
  opacity: 0.7;
  background-image: repeating-linear-gradient(90deg, var(--line-strong) 0 1px, transparent 1px 16px);
}

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

.page-faq .faq-head__lede {
  margin: 16px 0 0;
  max-width: var(--prose);
  color: var(--text);
  line-height: 1.75;
}

.page-faq .faq-head__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

/* ---------- 章节跳转 ---------- */
.page-faq .faq-jump {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--line);
}

.page-faq .faq-jump li {
  margin: 0;
}

.page-faq .faq-jump a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 13px 16px;
  background: var(--ink-800);
  color: var(--text);
  text-decoration: none;
  font-size: 0.94rem;
  line-height: 1.5;
  transition: background 200ms var(--ease), color 200ms var(--ease);
}

.page-faq .faq-jump a:hover,
.page-faq .faq-jump a:focus-visible {
  background: var(--ink-700);
  color: var(--text-strong);
}

.page-faq .faq-jump__num {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

/* ---------- 步骤轴 ---------- */
.page-faq .axis {
  margin-top: 28px;
  border-top: 1px solid var(--line);
}

.page-faq .axis-step {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  padding: 30px 0 36px;
  border-bottom: 1px solid var(--line);
  scroll-margin-top: 92px;
}

.page-faq .axis-step__rail {
  display: flex;
  align-items: center;
  gap: 12px;
}

.page-faq .axis-step__num {
  font-family: var(--font-mono);
  font-size: clamp(2rem, 8vw, 2.6rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--blue);
}

.page-faq .axis-step__tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--cyan);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-pill);
  padding: 3px 10px;
  white-space: nowrap;
}

.page-faq .axis-step__body {
  min-width: 0;
}

.page-faq .axis-step__title {
  margin: 0;
  font-size: 1.32rem;
  line-height: 1.4;
  color: var(--text-strong);
}

.page-faq .axis-step__lede {
  margin: 12px 0 0;
  max-width: var(--prose);
  color: var(--text);
  line-height: 1.75;
  font-size: 0.97rem;
}

/* ---------- 操作步骤列表 ---------- */
.page-faq .steplist {
  list-style: none;
  counter-reset: sl;
  margin: 20px 0 0;
  padding: 0;
}

.page-faq .steplist > li {
  position: relative;
  counter-increment: sl;
  padding-left: 38px;
  margin-bottom: 14px;
  color: var(--text);
  line-height: 1.75;
  font-size: 0.97rem;
}

.page-faq .steplist > li:last-child {
  margin-bottom: 0;
}

.page-faq .steplist > li::before {
  content: counter(sl, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0.28em;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  color: var(--blue-soft);
}

.page-faq .steplist > li::after {
  content: "";
  position: absolute;
  left: 10px;
  top: 1.9em;
  bottom: -1.1em;
  width: 1px;
  background: var(--line);
}

.page-faq .steplist > li:last-child::after {
  display: none;
}

.page-faq .steplist a {
  color: var(--blue-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

/* ---------- 提示条 ---------- */
.page-faq .hint {
  margin: 20px 0 0;
  padding: 14px 16px;
  border-left: 2px solid var(--amber);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: rgba(255, 176, 32, 0.07);
  color: var(--text);
  font-size: 0.93rem;
  line-height: 1.72;
  max-width: 46em;
}

/* ---------- 图示 ---------- */
.page-faq .axis-step__body .img-frame {
  margin: 24px 0 0;
}

.page-faq .axis-step__body .img-frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 常见卡点 ---------- */
.page-faq .chip-row {
  margin-top: 22px;
}

.page-faq .trouble {
  margin-top: 24px;
  border-top: 1px solid var(--line);
}

.page-faq .trouble__item {
  border-bottom: 1px solid var(--line);
}

.page-faq .trouble__item[hidden] {
  display: none;
}

.page-faq .trouble__item summary {
  position: relative;
  cursor: pointer;
  list-style: none;
  padding: 16px 38px 16px 0;
  color: var(--text-strong);
  font-weight: 600;
  font-size: 1rem;
  line-height: 1.6;
}

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

.page-faq .trouble__item summary::after {
  content: "+";
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 1.2rem;
  line-height: 1;
  color: var(--blue-soft);
}

.page-faq .trouble__item[open] summary::after {
  content: "\2013";
  color: var(--cyan);
}

.page-faq .trouble__item p {
  margin: 0 0 20px;
  max-width: 46em;
  color: var(--text);
  font-size: 0.95rem;
  line-height: 1.78;
}

/* ---------- 收尾引导 ---------- */
.page-faq .faq-cta {
  position: relative;
  display: grid;
  gap: 22px;
  padding: 26px 20px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  overflow: hidden;
  background:
    radial-gradient(80% 140% at 100% 0%, rgba(46, 125, 255, 0.18), transparent 60%),
    var(--ink-800);
}

.page-faq .faq-cta::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: linear-gradient(180deg, var(--orange), var(--blue));
}

.page-faq .faq-cta h2 {
  margin: 8px 0 0;
  font-size: 1.38rem;
  line-height: 1.42;
  color: var(--text-strong);
}

.page-faq .faq-cta p {
  margin: 12px 0 0;
  max-width: var(--prose);
  color: var(--text);
  line-height: 1.75;
  font-size: 0.96rem;
}

.page-faq .faq-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-head {
    padding-top: 34px;
  }

  .page-faq .faq-head__frame {
    padding: 32px 34px 38px;
  }

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

  .page-faq .faq-cta {
    padding: 32px 36px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-jump {
    grid-template-columns: repeat(5, 1fr);
  }

  .page-faq .faq-jump a {
    flex-direction: column;
    gap: 6px;
    padding: 15px 16px 17px;
  }

  .page-faq .axis-step {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: 40px;
    padding: 42px 0 48px;
  }

  .page-faq .axis-step__rail {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
    position: sticky;
    top: calc(var(--topbar-h-lg) + 26px);
    align-self: start;
  }

  .page-faq .axis-step__rail::after {
    content: "";
    display: block;
    width: 1px;
    height: 58px;
    margin-top: 4px;
    background: linear-gradient(180deg, var(--blue), transparent);
  }

  .page-faq .axis-step__title {
    font-size: 1.55rem;
  }

  .page-faq .faq-cta {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    align-items: center;
    gap: 36px;
  }

  .page-faq .faq-cta__links {
    flex-direction: column;
    align-items: stretch;
  }

  .page-faq .faq-cta__links .btn {
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-jump a {
    transition: none;
  }
}