.page-faq {
  background: var(--c-paper);
  color: var(--c-ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
}

/* ---------- 首屏 ---------- */
.page-faq .tut-hero {
  background: var(--c-ink);
  color: var(--c-paper);
  border-bottom: 1px solid var(--line-dark);
}

.page-faq .tut-hero .breadcrumb,
.page-faq .tut-hero .breadcrumb a {
  color: var(--c-lake-soft);
}

.page-faq .tut-hero-inner {
  display: grid;
  gap: 32px;
  padding: 32px 0 40px;
}

.page-faq .tut-hero-kicker {
  margin: 0 0 16px;
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-mustard);
}

.page-faq .tut-title {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.1rem, 7.4vw, 3.6rem);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--c-paper);
}

.page-faq .tut-lead {
  margin: 0;
  max-width: 46em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--c-lake-soft);
}

.page-faq .tut-hero-side {
  border-top: 1px solid var(--line-dark);
  padding-top: 18px;
}

.page-faq .tut-side-label {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--c-stone);
}

.page-faq .tut-hero-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.page-faq .tut-hero-list li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  border-bottom: 1px solid var(--line-dark-soft);
  padding-bottom: 8px;
}

.page-faq .tut-hero-list .mono {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--c-mustard);
  min-width: 4.5em;
}

.page-faq .tut-hero-list em {
  font-style: normal;
  font-size: 14px;
  color: var(--c-lake-soft);
}

/* ---------- 外壳 ---------- */
.page-faq .tut-shell {
  display: grid;
  gap: 40px;
  padding: 40px 0 72px;
}

/* ---------- 左侧主题树 ---------- */
.page-faq .tut-tree {
  font-size: 15px;
}

.page-faq .tut-tree-head {
  margin: 0 0 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-strong);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--c-ink);
}

.page-faq .tut-tree-head .mono {
  color: var(--c-lake);
  margin-right: 8px;
}

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

.page-faq .tut-node > summary {
  list-style: none;
  cursor: pointer;
  padding: 12px 0 12px 14px;
  border-left: 3px solid var(--c-moss);
  font-weight: 500;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .tut-node > summary::-webkit-details-marker {
  display: none;
}

.page-faq .tut-node > summary:hover {
  color: var(--c-link);
}

.page-faq .tut-node[open] > summary {
  border-left-color: var(--c-mustard);
}

.page-faq .tut-node > summary .mono {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-lake);
  margin-right: 10px;
}

.page-faq .tut-node-list {
  margin: 0;
  padding: 0 0 12px 14px;
  list-style: none;
}

.page-faq .tut-node-list li + li {
  margin-top: 6px;
}

.page-faq .tut-node-link {
  display: block;
  padding: 4px 0;
  font-size: 14px;
  color: var(--c-ink);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.page-faq .tut-node-link:hover,
.page-faq .tut-node-link:focus-visible {
  color: var(--c-link);
  border-bottom-color: var(--c-signal);
}

.page-faq .tut-tree-foot {
  margin: 18px 0 0;
  font-size: 12px;
  color: var(--c-stone);
}

/* ---------- 章节 ---------- */
.page-faq .tut-section {
  padding: 0 0 48px;
  border-bottom: 1px solid var(--line-soft);
  margin-bottom: 48px;
}

.page-faq .tut-section:last-child {
  border-bottom: 0;
  margin-bottom: 0;
  padding-bottom: 8px;
}

.page-faq .tut-section-head {
  margin-bottom: 26px;
}

.page-faq .tut-section-code {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--c-lake);
  border: 1px solid var(--c-lake);
  padding: 2px 8px;
  margin-bottom: 12px;
}

.page-faq .tut-section-title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.6rem, 4.4vw, 2.4rem);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--c-ink);
}

.page-faq .tut-section-lede {
  margin: 0;
  max-width: 42em;
  font-size: 16px;
  color: var(--c-ink);
  opacity: 0.86;
}

.page-faq .tut-sub-title {
  margin: 34px 0 12px;
  font-size: 19px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--c-ink);
  border-left: 3px solid var(--c-lake);
  padding-left: 12px;
}

/* ---------- 步骤列表 ---------- */
.page-faq .tut-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: tutstep;
}

.page-faq .tut-step {
  position: relative;
  counter-increment: tutstep;
  padding: 22px 34px 22px 56px;
  border-top: 1px solid var(--line-soft);
}

.page-faq .tut-step:first-child {
  border-top: 0;
  padding-top: 12px;
}

.page-faq .tut-step::before {
  content: counter(tutstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 20px;
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
  color: var(--c-lake);
}

.page-faq .tut-step:first-child::before {
  top: 10px;
}

.page-faq .tut-step::after {
  content: counter(tutstep, decimal-leading-zero);
  position: absolute;
  right: 4px;
  top: 26px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--c-stone);
}

.page-faq .tut-step::after,
.page-faq .tut-step::before {
  pointer-events: none;
}

.page-faq .tut-step-title {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--c-ink);
}

.page-faq .tut-step p {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--c-ink);
  opacity: 0.88;
}

.page-faq .tut-steps-tight .tut-step {
  padding-left: 46px;
}

.page-faq .tut-steps-tight .tut-step::before {
  font-size: 22px;
}

/* ---------- 注意事项 ---------- */
.page-faq .tut-note {
  margin: 26px 0 0;
  padding: 16px 18px;
  border: 1px solid var(--line-strong);
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-ink);
}

.page-faq .tut-note p {
  margin: 0;
}

.page-faq .tut-note strong {
  color: var(--c-link);
  font-weight: 600;
}

/* ---------- 图片 ---------- */
.page-faq .tut-figure {
  margin: 30px 0 0;
}

.page-faq .tut-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line-soft);
  object-fit: cover;
}

.page-faq .tut-figure figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  color: var(--c-stone);
}

/* ---------- 自查清单 ---------- */
.page-faq .tut-check {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
}

.page-faq .tut-check li {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line-soft);
  font-size: 16px;
  line-height: 1.75;
}

.page-faq .tut-check li:first-child {
  border-top: 1px solid var(--line-soft);
}

.page-faq .tut-check .mono {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-mustard);
  padding-top: 4px;
}

/* ---------- 九大主题索引 ---------- */
.page-faq .tut-qa {
  margin-top: 20px;
  border-top: 1px solid var(--line-soft);
}

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

.page-faq .tut-qa .qa > summary {
  cursor: pointer;
  padding: 15px 0 15px 14px;
  border-left: 3px solid var(--c-moss);
  font-size: 16px;
  font-weight: 500;
  color: var(--c-ink);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .tut-qa .qa > summary:hover {
  color: var(--c-link);
}

.page-faq .tut-qa .qa[open] > summary {
  border-left-color: var(--c-signal);
}

.page-faq .tut-qa .qa-body {
  padding: 0 0 16px 14px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-ink);
  opacity: 0.85;
}

.page-faq .tut-qa .qa-body p {
  margin: 0;
}

/* ---------- 求助区块 ---------- */
.page-faq .tut-grid {
  display: grid;
  gap: 28px;
  margin-top: 6px;
}

.page-faq .tut-prep {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .tut-prep li {
  position: relative;
  padding: 10px 0 10px 20px;
  border-bottom: 1px solid var(--line-soft);
  font-size: 16px;
  line-height: 1.75;
}

.page-faq .tut-prep li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 20px;
  width: 10px;
  height: 1px;
  background: var(--c-lake);
}

.page-faq .tut-prep a {
  color: var(--c-link);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

.page-faq .tut-prep a:hover {
  color: var(--c-signal);
}

.page-faq .tut-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--line-soft);
}

/* ---------- 响应式 ---------- */
@media (min-width: 768px) {
  .page-faq .tut-hero-inner {
    padding: 48px 0 52px;
  }

  .page-faq .tut-lead {
    font-size: 17px;
  }

  .page-faq .tut-step {
    padding-right: 44px;
  }

  .page-faq .tut-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 40px;
  }
}

@media (min-width: 1040px) {
  .page-faq .tut-hero-inner {
    grid-template-columns: minmax(0, 1fr) 300px;
    align-items: end;
    gap: 56px;
    padding: 72px 0 64px;
  }

  .page-faq .tut-hero-side {
    border-top: 0;
    padding-top: 0;
    padding-left: 24px;
    border-left: 1px solid var(--line-dark);
  }

  .page-faq .tut-shell {
    grid-template-columns: 264px minmax(0, 1fr);
    gap: 56px;
    padding: 56px 0 88px;
  }

  .page-faq .tut-tree {
    position: sticky;
    top: calc(var(--header-h, 56px) + 24px);
    align-self: start;
    max-height: calc(100vh - var(--header-h, 56px) - 48px);
    overflow-y: auto;
  }

  .page-faq .tut-section {
    padding-bottom: 56px;
    margin-bottom: 56px;
  }

  .page-faq .tut-step {
    padding-left: 72px;
    padding-right: 52px;
  }

  .page-faq .tut-step::before {
    font-size: 36px;
  }

  .page-faq .tut-step::after {
    right: 8px;
  }
}

@media (min-width: 1320px) {
  .page-faq .tut-section-lede,
  .page-faq .tut-step p,
  .page-faq .tut-qa .qa-body {
    max-width: 720px;
  }
}