.page-faq {
  counter-reset: grp;
  background: var(--ink);
  color: var(--paper);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-intro {
  padding-block: clamp(26px, 5vw, 54px) clamp(24px, 4vw, 42px);
}

.page-faq .crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--index);
}

.page-faq .crumb a {
  color: var(--index);
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}

.page-faq .crumb a:hover,
.page-faq .crumb a:focus-visible {
  color: var(--pulse);
}

.page-faq .crumb-sep {
  color: var(--clay);
}

.page-faq .eyebrow {
  margin: 22px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--gold);
}

.page-faq .faq-intro h1 {
  margin: 14px 0 18px;
  max-width: 22ch;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 5.4vw, 60px);
  line-height: 1.06;
  letter-spacing: -0.005em;
}

.page-faq .lede {
  margin: 0;
  max-width: 38ch;
  color: var(--board);
  font-size: clamp(15px, 1.6vw, 16.5px);
  line-height: 1.75;
}

/* ---------- 两步路径 ---------- */
.page-faq .faq-quick {
  position: relative;
  padding-block: clamp(34px, 5vw, 68px);
  border-block: 1px solid var(--line);
  background: var(--layer);
  overflow: hidden;
}

.page-faq .faq-quick::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    115deg,
    transparent 0 24px,
    rgba(168, 188, 176, 0.06) 24px 25px
  );
  pointer-events: none;
}

.page-faq .faq-quick-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
}

.page-faq .quick-title {
  margin: 12px 0 0;
  max-width: 18ch;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(22px, 3.4vw, 34px);
  line-height: 1.18;
}

.page-faq .step-list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
}

.page-faq .step-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px 16px;
  padding: 16px 0;
  border-top: 1px solid var(--line);
}

.page-faq .step-item:last-child {
  border-bottom: 1px solid var(--line);
}

.page-faq .step-num {
  padding-top: 2px;
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--pulse);
}

.page-faq .step-title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 18px;
  line-height: 1.3;
}

.page-faq .step-desc {
  margin: 0;
  max-width: 46ch;
  color: var(--board);
  font-size: 14.5px;
  line-height: 1.72;
}

.page-faq .path-svg {
  display: block;
  width: 100%;
  max-width: 320px;
  height: auto;
  margin-top: 26px;
}

.page-faq .path-line {
  stroke: var(--line);
  stroke-width: 1;
  stroke-dasharray: 4 6;
}

.page-faq .path-node {
  fill: none;
  stroke: var(--pulse);
  stroke-width: 1.5;
}

.page-faq .path-node--end {
  stroke: var(--gold);
}

.page-faq .path-arrow {
  fill: var(--gold);
}

.page-faq .path-text {
  fill: var(--board);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
}

.page-faq .quick-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
  margin-top: 24px;
}

.page-faq .quick-jump a {
  display: inline-block;
  padding: 7px 12px;
  border: 1px solid var(--line);
  border-radius: 2px;
  color: var(--board);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-decoration: none;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease),
    background var(--dur) var(--ease);
}

.page-faq .quick-jump a:hover,
.page-faq .quick-jump a:focus-visible {
  border-color: var(--pulse);
  background: rgba(255, 106, 31, 0.08);
  color: var(--flash);
}

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

.page-faq .media-frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line);
  background: var(--ink);
}

.page-faq .faq-quick-media {
  align-self: start;
}

.page-faq .faq-quick-media img {
  aspect-ratio: 3 / 2;
}

.page-faq .media-cap {
  margin-top: 10px;
  color: var(--index);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.65;
  letter-spacing: 0.04em;
}

/* ---------- 问答组 ---------- */
.page-faq .qa-group {
  counter-increment: grp;
  counter-reset: qa;
  padding-block: clamp(36px, 5.4vw, 74px);
}

.page-faq .qa-group + .qa-group {
  border-top: 1px solid var(--line);
}

.page-faq .qa-group-head {
  display: grid;
  gap: 8px;
  margin-bottom: 20px;
}

.page-faq .qa-group-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(21px, 3.1vw, 32px);
  line-height: 1.2;
}

.page-faq .qa-group-title::before {
  content: counter(grp, decimal-leading-zero);
  margin-right: 0.7em;
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 0.68em;
  font-weight: 400;
  letter-spacing: 0.14em;
  vertical-align: 0.14em;
}

.page-faq .qa-group-note {
  margin: 0;
  max-width: 40ch;
  color: var(--index);
  font-size: 14px;
  line-height: 1.7;
}

.page-faq .qa-group-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 46px);
}

/* ---------- 折叠条目 ---------- */
.page-faq .faq-list {
  min-width: 0;
}

.page-faq .fold {
  position: relative;
  display: block;
  counter-increment: qa;
  border-top: 1px solid var(--line);
  transition: background var(--dur) var(--ease);
}

.page-faq .faq-list .fold:last-child {
  border-bottom: 1px solid var(--line);
}

.page-faq .fold::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 0;
  bottom: 0;
  width: 3px;
  background: transparent;
  transition: background var(--dur) var(--ease);
}

.page-faq .fold[open] {
  background: linear-gradient(90deg, rgba(255, 106, 31, 0.09), transparent 68%);
}

.page-faq .fold[open]::before {
  background: var(--pulse);
}

.page-faq .fold-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 14px;
  align-items: start;
  padding: 16px 14px 16px 0;
  list-style: none;
  cursor: pointer;
  color: var(--paper);
  transition: padding var(--dur) var(--ease);
}

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

.page-faq .fold-head::marker {
  content: "";
}

.page-faq .fold-head::before {
  content: "Q" counter(qa, decimal-leading-zero);
  padding-top: 4px;
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  transition: color var(--dur) var(--ease);
}

.page-faq .fold-head::after {
  content: "";
  width: 9px;
  height: 9px;
  margin-top: 8px;
  justify-self: end;
  border-right: 1.5px solid var(--board);
  border-bottom: 1.5px solid var(--board);
  transform: rotate(45deg);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .fold[open] .fold-head {
  padding-left: 14px;
}

.page-faq .fold[open] .fold-head::before {
  color: var(--pulse);
}

.page-faq .fold[open] .fold-head::after {
  transform: rotate(-135deg);
  border-color: var(--pulse);
}

.page-faq .fold-head:hover::after,
.page-faq .fold-head:focus-visible::after {
  border-color: var(--pulse);
}

.page-faq .fold-head:focus-visible {
  outline: 2px solid var(--pulse);
  outline-offset: 3px;
}

.page-faq .qa-q {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(16px, 2.1vw, 19px);
  line-height: 1.45;
}

.page-faq .fold-body {
  padding: 0 14px 22px 0;
  transition: padding var(--dur) var(--ease);
}

.page-faq .fold[open] .fold-body {
  padding-left: 14px;
}

.page-faq .qa-points {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 9px;
  max-width: 62ch;
}

.page-faq .qa-points li {
  position: relative;
  padding-left: 20px;
  color: var(--board);
  font-size: 14.5px;
  line-height: 1.72;
}

.page-faq .qa-points li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.76em;
  width: 9px;
  height: 1px;
  background: var(--clay);
}

/* ---------- 兜底帮助 ---------- */
.page-faq .qa-help {
  padding-block: clamp(38px, 5.6vw, 78px);
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(20, 41, 30, 0.92), rgba(12, 26, 19, 0.35));
}

.page-faq .help-card {
  display: grid;
  gap: 20px;
  padding: clamp(20px, 3.2vw, 34px);
  border: 1px solid var(--line);
  border-left: 3px solid var(--pulse);
  background: var(--layer);
}

.page-faq .help-title {
  margin: 10px 0 10px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(21px, 3vw, 30px);
  line-height: 1.22;
}

.page-faq .help-lede {
  margin: 0;
  max-width: 42ch;
  color: var(--board);
  font-size: 15px;
  line-height: 1.75;
}

.page-faq .help-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
  border-top: 1px solid var(--line);
  padding-top: 18px;
}

.page-faq .help-list li {
  position: relative;
  padding-left: 20px;
  color: var(--board);
  font-size: 14.5px;
  line-height: 1.72;
  max-width: 62ch;
}

.page-faq .help-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.76em;
  width: 9px;
  height: 1px;
  background: var(--gold);
}

.page-faq .help-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.page-faq .help-actions .copy-btn {
  border: 1px solid var(--line);
  border-radius: 2px;
  background: transparent;
  color: var(--board);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  padding: 10px 14px;
  cursor: pointer;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease),
    background var(--dur) var(--ease);
}

.page-faq .help-actions .copy-btn:hover,
.page-faq .help-actions .copy-btn:focus-visible {
  border-color: var(--pulse);
  color: var(--flash);
}

.page-faq .help-actions .copy-btn[data-copied="true"] {
  border-color: var(--gold);
  color: var(--gold);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-quick-media img {
    aspect-ratio: 3 / 2;
  }

  .page-faq .qa-points {
    gap: 10px;
  }
}

@media (min-width: 940px) {
  .page-faq .faq-quick-grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
    align-items: start;
  }

  .page-faq .faq-quick-media {
    transform: translateY(-14px);
  }

  .page-faq .qa-group-body {
    grid-template-columns: minmax(0, 1.32fr) minmax(0, 0.68fr);
    align-items: start;
  }

  .page-faq .faq-nav-media {
    position: sticky;
    top: 120px;
  }

  .page-faq .faq-nav-media img {
    aspect-ratio: 3 / 4;
  }

  .page-faq .help-card {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
    column-gap: clamp(28px, 4vw, 56px);
  }

  .page-faq .help-card > .help-lede {
    grid-column: 1;
  }

  .page-faq .help-actions {
    grid-column: 1 / -1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .fold,
  .page-faq .fold::before,
  .page-faq .fold-head,
  .page-faq .fold-head::before,
  .page-faq .fold-head::after,
  .page-faq .fold-body,
  .page-faq .quick-jump a,
  .page-faq .help-actions .copy-btn {
    transition-duration: 1ms;
  }

  .page-faq .fold-head::after {
    transition: none;
  }
}