/* ===== 使用教程页 ===== */
.page-faq {
  --tut-col: 44px;
  --tut-axis: 22px;
  --tut-ink: rgba(242, 245, 243, 0.78);
  --tut-ink-soft: rgba(242, 245, 243, 0.62);
  background: var(--carbon);
  color: var(--chalk);
  padding-bottom: clamp(56px, 10vw, 110px);
}

.page-faq .tut-hero {
  display: grid;
  gap: 18px;
  padding-bottom: clamp(30px, 6vw, 64px);
}

.page-faq .tut-kicker {
  margin: 0;
  font-family: var(--font-data);
  font-size: 11.5px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--turf);
}

.page-faq h1 {
  position: relative;
  margin: 0;
  padding-top: clamp(16px, 3vw, 26px);
  max-width: 20ch;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(36px, 8vw, 88px);
  line-height: 0.99;
  letter-spacing: -0.012em;
  color: var(--chalk);
}

.page-faq h1::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: clamp(56px, 12vw, 130px);
  height: 4px;
  background: var(--turf);
}

.page-faq .tut-lede {
  margin: 0;
  max-width: 68ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--tut-ink);
}

.page-faq .tut-hero-points {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-faq .tut-hero-points li {
  display: grid;
  gap: 6px;
  padding: 14px 16px;
  border: 1px solid var(--seam);
  border-left: 2px solid var(--turf);
  background: linear-gradient(180deg, rgba(37, 229, 166, 0.07), transparent 72%), var(--pitch);
}

.page-faq .tut-hero-points strong {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--chalk);
}

.page-faq .tut-hero-points span {
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--mist);
}

/* ---------- 步骤轨道 ---------- */
.page-faq .tut-track {
  position: relative;
  display: grid;
  gap: clamp(40px, 7vw, 84px);
  padding-top: clamp(10px, 2vw, 22px);
}

.page-faq .tut-track::before {
  content: "";
  position: absolute;
  left: var(--tut-axis);
  transform: translateX(-50%);
  top: 20px;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--turf) 0%, var(--seam) 14%, var(--seam) 86%, transparent 100%);
}

.page-faq .tut-step {
  position: relative;
  display: grid;
  grid-template-columns: var(--tut-col) minmax(0, 1fr);
  column-gap: clamp(12px, 3vw, 30px);
  scroll-margin-top: calc(var(--head-h) + 28px);
}

.page-faq .tut-node {
  grid-column: 1;
  justify-self: center;
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border: var(--edge) solid var(--seam);
  border-radius: 999px;
  background: var(--pitch-deep);
  text-decoration: none;
  color: var(--mist);
  font-family: var(--font-data);
  font-size: 12.5px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  position: relative;
  z-index: 1;
  transition: color 0.3s var(--ease), border-color 0.3s var(--ease),
    background 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.page-faq .tut-node:hover,
.page-faq .tut-node:focus-visible {
  border-color: var(--turf);
  color: var(--turf);
  background: var(--pitch);
  box-shadow: 0 0 0 4px var(--turf-soft);
  outline: none;
}

.page-faq .tut-step[data-section-active] .tut-node {
  border-color: var(--turf);
  color: var(--turf);
  background: var(--pitch);
}

.page-faq .tut-body {
  grid-column: 2;
  min-width: 0;
  display: grid;
  gap: 14px;
}

.page-faq .tut-step-kicker {
  margin: 8px 0 0;
  font-family: var(--font-data);
  font-size: 11.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-faq .tut-step-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(24px, 4.6vw, 44px);
  line-height: 1.1;
  letter-spacing: -0.006em;
  color: var(--chalk);
}

.page-faq .tut-body > p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--tut-ink);
}

.page-faq .tut-body a {
  color: var(--turf);
  text-decoration: none;
  border-bottom: 1px solid rgba(37, 229, 166, 0.45);
  transition: border-color 0.25s var(--ease);
}

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

.page-faq .tut-takeaway {
  margin: 2px 0 0;
  padding: 12px 14px;
  border-left: 2px solid var(--turf);
  background: rgba(37, 229, 166, 0.06);
  font-size: 14px;
  line-height: 1.72;
  color: #d8e6df;
}

.page-faq .tut-warn {
  margin: 0;
  padding: 12px 14px;
  border-left: 2px solid var(--ember);
  background: rgba(255, 138, 61, 0.07);
  font-size: 14px;
  line-height: 1.72;
  color: #f0d8c7;
}

/* ---------- 双列区块 ---------- */
.page-faq .tut-cols {
  display: grid;
  gap: 20px;
}

.page-faq .tut-col {
  display: grid;
  gap: 12px;
  min-width: 0;
}

.page-faq .tut-col p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--tut-ink);
}

/* ---------- 步骤 1 迷你列表 ---------- */
.page-faq .tut-mini {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .tut-mini li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 13px 15px;
  border: 1px solid var(--seam);
  background: var(--pitch);
}

.page-faq .tut-mini-num {
  font-family: var(--font-data);
  font-size: 12.5px;
  font-weight: 700;
  color: var(--turf);
  padding-top: 2px;
}

.page-faq .tut-mini-text {
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--tut-ink);
}

.page-faq .tut-mini-text strong {
  color: var(--chalk);
  font-weight: 600;
}

/* ---------- 图片 ---------- */
.page-faq .tut-figure {
  margin: 4px 0 0;
  display: grid;
  gap: 10px;
}

.page-faq .tut-figure--narrow {
  max-width: 620px;
}

.page-faq .tut-figure .media {
  border: var(--edge) solid var(--seam);
  background: var(--pitch-deep);
}

/* ---------- 主客场对照卡 ---------- */
.page-faq .tut-compare {
  display: grid;
  gap: 0;
  padding: clamp(14px, 3vw, 22px);
  border: var(--edge) solid var(--seam);
  background: var(--pitch-deep);
  box-shadow: var(--shadow-hard);
  min-width: 0;
}

.page-faq .tut-compare-head,
.page-faq .tut-compare-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: baseline;
  gap: 12px;
}

.page-faq .tut-compare-head {
  padding-bottom: 12px;
  border-bottom: 1px solid var(--seam);
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-faq .tut-compare-head span:first-child {
  text-align: right;
}

.page-faq .tut-compare-head span:last-child {
  text-align: left;
}

.page-faq .tut-compare-head span:nth-child(2) {
  text-align: center;
}

.page-faq .tut-compare-row {
  padding: 12px 0;
  border-bottom: 1px solid rgba(34, 53, 46, 0.7);
}

.page-faq .tut-compare-row:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-faq .tut-compare-val {
  font-family: var(--font-data);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  font-size: clamp(19px, 3.2vw, 28px);
  line-height: 1.1;
  color: var(--chalk);
}

.page-faq .tut-compare-val--warm {
  color: var(--ember);
}

.page-faq .tut-compare-val--cold {
  color: var(--cold);
}

.page-faq .tut-compare-val:first-child {
  text-align: right;
}

.page-faq .tut-compare-val:last-child {
  text-align: left;
}

.page-faq .tut-compare-key {
  font-family: var(--font-data);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--mist);
  white-space: nowrap;
  text-align: center;
}

/* ---------- 出场时间区间条 ---------- */
.page-faq .tut-range {
  display: grid;
  gap: 14px;
  padding: clamp(14px, 3vw, 22px);
  border: 1px solid var(--seam);
  background: var(--pitch);
}

.page-faq .tut-range-cap {
  margin: 0;
  font-family: var(--font-data);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

.page-faq .tut-range-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .tut-range-list li {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 64px;
  grid-template-areas:
    "key num"
    "track track";
  gap: 6px 12px;
  align-items: center;
}

.page-faq .tut-range-key {
  grid-area: key;
  font-size: 13.5px;
  color: var(--tut-ink);
}

.page-faq .tut-range-num {
  grid-area: num;
  text-align: right;
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 14px;
  font-variant-numeric: tabular-nums;
  color: var(--cold);
}

.page-faq .tut-range-track {
  grid-area: track;
  display: block;
  height: 8px;
  background: rgba(34, 53, 46, 0.85);
  overflow: hidden;
}

.page-faq .tut-range-fill {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--cold), var(--turf));
}

.page-faq .tut-range-fill--a {
  width: 100%;
}

.page-faq .tut-range-fill--b {
  width: 92%;
}

.page-faq .tut-range-fill--c {
  width: 78%;
}

/* ---------- 导出说明 ---------- */
.page-faq .tut-export {
  display: grid;
  gap: 14px;
}

.page-faq .tut-export-item {
  display: grid;
  gap: 8px;
  padding: 16px 18px;
  border: var(--edge) solid var(--seam);
  background: var(--pitch);
  box-shadow: var(--shadow-hard);
}

.page-faq .tut-export-tag {
  margin: 0;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ember);
}

.page-faq .tut-export-item p:last-child {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--tut-ink);
}

/* ---------- 订阅选择器 ---------- */
.page-faq .tut-picker {
  display: grid;
  gap: 16px;
  padding: clamp(14px, 3vw, 22px);
  border: 1px solid var(--seam);
  background: var(--pitch-deep);
}

.page-faq .tut-picker-row {
  display: grid;
  gap: 8px;
}

.page-faq .tut-picker-label {
  margin: 0;
  font-family: var(--font-data);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mist);
}

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

.page-faq .tut-picker-list .chip {
  opacity: 0.4;
  transition: opacity 0.25s var(--ease);
}

.page-faq .tut-picker-list .chip.is-on {
  opacity: 1;
}

.page-faq .tut-picker-list .chip.is-on::before {
  content: "✓";
  margin-right: 6px;
  font-family: var(--font-data);
  font-size: 11px;
}

/* ---------- 纠错流程 ---------- */
.page-faq .tut-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
  counter-reset: tut-flow;
}

.page-faq .tut-flow li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 13px 15px;
  border-left: 2px solid var(--seam);
  background: linear-gradient(90deg, rgba(255, 75, 43, 0.08), transparent 60%), var(--pitch);
}

.page-faq .tut-flow-num {
  font-family: var(--font-data);
  font-size: 12.5px;
  font-weight: 700;
  color: var(--penalty);
  padding-top: 2px;
}

.page-faq .tut-flow-text {
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--tut-ink);
}

/* ---------- 常见问题 ---------- */
.page-faq .tut-faq {
  display: grid;
  border-top: 1px solid var(--seam);
}

.page-faq .tut-faq-item {
  border-bottom: 1px solid var(--seam);
}

.page-faq .tut-faq-item summary {
  position: relative;
  list-style: none;
  cursor: pointer;
  padding: 17px 42px 17px 0;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--chalk);
  transition: color 0.25s var(--ease);
}

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

.page-faq .tut-faq-item summary::after {
  content: "+";
  position: absolute;
  right: 2px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-data);
  font-size: 20px;
  line-height: 1;
  color: var(--turf);
  transition: transform 0.3s var(--ease);
}

.page-faq .tut-faq-item[open] summary::after {
  transform: translateY(-50%) rotate(45deg);
}

.page-faq .tut-faq-item summary:hover {
  color: var(--turf);
}

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

.page-faq .tut-faq-body {
  margin: 0;
  padding: 0 0 18px;
  max-width: 68ch;
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--tut-ink-soft);
}

/* ---------- 下一步 ---------- */
.page-faq .tut-next {
  margin-top: clamp(48px, 8vw, 96px);
  padding-top: clamp(26px, 5vw, 44px);
  border-top: 2px solid var(--seam);
  display: grid;
  gap: 16px;
}

.page-faq .tut-next h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(26px, 5vw, 46px);
  line-height: 1.08;
  color: var(--chalk);
}

.page-faq .tut-next > p {
  margin: 0;
  max-width: 66ch;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--tut-ink);
}

.page-faq .tut-next-list {
  list-style: none;
  margin: 6px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-faq .tut-next-list a {
  display: grid;
  gap: 6px;
  padding: 16px 18px;
  border: var(--edge) solid var(--seam);
  background: var(--pitch);
  text-decoration: none;
  transition: border-color 0.28s var(--ease), background 0.28s var(--ease),
    transform 0.28s var(--ease);
}

.page-faq .tut-next-list a:hover,
.page-faq .tut-next-list a:focus-visible {
  border-color: var(--turf);
  background: var(--pitch-deep);
  transform: translate(-2px, -2px);
  outline: none;
}

.page-faq .tut-next-key {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  color: var(--turf);
}

.page-faq .tut-next-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-faq .tut-hero-points {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

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

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

@media (min-width: 960px) {
  .page-faq .tut-cols {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 1fr);
    gap: 32px;
    align-items: start;
  }

  .page-faq .tut-range-list li {
    grid-template-columns: 140px minmax(0, 1fr) 72px;
    grid-template-areas: "key track num";
    gap: 6px 16px;
  }

  .page-faq .tut-range-key {
    font-family: var(--font-data);
    font-size: 12.5px;
    color: var(--mist);
  }
}

@media (max-width: 480px) {
  .page-faq {
    --tut-col: 38px;
    --tut-axis: 19px;
  }

  .page-faq .tut-node {
    width: 34px;
    height: 34px;
    font-size: 11.5px;
  }

  .page-faq .tut-compare-key {
    font-size: 10.5px;
    letter-spacing: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .tut-node,
  .page-faq .tut-next-list a,
  .page-faq .tut-faq-item summary,
  .page-faq .tut-faq-item summary::after,
  .page-faq .tut-picker-list .chip {
    transition: none;
  }
}