.page-faq {
  --faq-gap: clamp(32px, 5vw, 64px);
  --faq-aside-w: 232px;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  overflow-x: clip;
}

.page-faq .faq-crumb {
  padding-top: clamp(20px, 3vw, 36px);
}

/* 首屏框景 */
.page-faq .faq-hero {
  padding: 0 var(--pad) clamp(36px, 6vw, 72px);
}

.page-faq .faq-hero__inner {
  position: relative;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(26px, 4vw, 48px) clamp(18px, 3vw, 44px) clamp(30px, 4vw, 52px);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
  background-image: linear-gradient(180deg, rgba(12, 46, 39, 0.55), rgba(7, 31, 26, 0));
}

.page-faq .faq-hero__inner::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 9px;
  background-image: repeating-linear-gradient(90deg, var(--line) 0 1px, transparent 1px 22px);
  pointer-events: none;
}

.page-faq .faq-hero__inner::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 48px;
  height: 48px;
  border-bottom: 1px solid var(--line);
  border-right: 1px solid var(--line);
  clip-path: polygon(100% 0, 100% 100%, 0 100%);
  background: var(--ink-2);
  opacity: 0.5;
}

.page-faq .faq-hero__title {
  margin: 18px 0 0;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(32px, 5.6vw, 64px);
  line-height: 1.12;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-faq .faq-hero__lead {
  margin-top: 20px;
  max-width: 34em;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.85;
}

/* 斜切现象标签 */
.page-faq .faq-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-chip {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 28px 10px 14px;
  background: var(--ink-2);
  border: 1px solid var(--line);
  color: var(--paper);
  font-size: 14px;
  line-height: 1.2;
  text-decoration: none;
  clip-path: polygon(0 0, 100% 0, calc(100% - 16px) 100%, 0 100%);
  transition: transform 180ms var(--ease), background-color 180ms var(--ease);
}

.page-faq .faq-chip:hover {
  transform: translateX(4px);
  background: var(--panel);
}

.page-faq .faq-chip:focus-visible {
  outline: none;
  background: var(--panel);
  box-shadow: inset 0 0 0 2px var(--cyan);
}

.page-faq .faq-chip__no {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  color: var(--cyan);
}

/* 主体两栏 */
.page-faq .faq-body {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--pad) clamp(64px, 9vw, 120px);
  display: grid;
  gap: var(--faq-gap);
  grid-template-columns: minmax(0, 1fr);
}

.page-faq .faq-flow {
  min-width: 0;
}

.page-faq .faq-aside {
  display: none;
}

.page-faq .faq-aside__title {
  margin: 0 0 12px;
  font-family: var(--font-cond);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .faq-aside .se-index-list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 0;
  border-left: 1px solid var(--line-soft);
}

.page-faq .faq-aside .se-index-list__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-left: -1px;
  padding: 9px 0 9px 12px;
  border-left: 1px solid transparent;
  font-size: 13px;
  color: var(--muted);
  text-decoration: none;
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-faq .faq-aside .se-index-list__link:hover {
  color: var(--paper);
}

.page-faq .faq-aside .se-index-list__link[aria-current="true"] {
  color: var(--cyan);
  border-left-color: var(--cyan);
}

.page-faq .faq-aside .se-index-list__no {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 11px;
  color: var(--cyan-deep);
}

/* 章节 */
.page-faq .faq-sec {
  padding-top: clamp(26px, 4vw, 40px);
  scroll-margin-top: 84px;
}

.page-faq .faq-sec + .faq-sec {
  margin-top: clamp(40px, 6vw, 76px);
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-sec__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(24px, 3.6vw, 38px);
  line-height: 1.24;
  letter-spacing: 0.015em;
  color: var(--paper);
}

.page-faq .faq-sec__lead {
  margin: 16px 0 0;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .se-note {
  margin: 20px 0 0;
  max-width: 34em;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--muted);
  padding-left: 14px;
  border-left: 1px solid var(--line);
}

/* 现象列表 */
.page-faq .faq-signs {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-faq .faq-sign {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 0 14px;
  align-items: start;
  padding: 16px 18px;
  background: var(--ink);
}

.page-faq .faq-sign__no {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  line-height: 1.6;
  color: var(--cyan);
  letter-spacing: 0.04em;
}

.page-faq .faq-sign__body {
  min-width: 0;
}

.page-faq .faq-sign__label {
  margin: 0;
  font-size: 16px;
  font-weight: 500;
  line-height: 1.5;
  color: var(--paper);
}

.page-faq .faq-sign__desc {
  margin: 6px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--muted);
}

/* 配图 */
.page-faq .faq-figure {
  margin: 26px 0 0;
  border: 1px solid var(--line-soft);
  background: var(--ink-2);
}

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

.page-faq .faq-figure figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--line-soft);
  font-family: var(--font-cond);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

/* 折叠指引 */
.page-faq .faq-folds {
  margin-top: 24px;
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-fold {
  border-bottom: 1px solid var(--line-soft);
  border-left: 1px solid transparent;
  padding-left: 14px;
  transition: border-color 200ms var(--ease), background-color 200ms var(--ease);
}

.page-faq .faq-fold[open] {
  border-left-color: var(--cyan);
  background-image: linear-gradient(90deg, rgba(56, 242, 200, 0.05), rgba(56, 242, 200, 0));
}

.page-faq .faq-fold__sum {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) 16px;
  gap: 12px;
  align-items: center;
  padding: 18px 0;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-fold__sum:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-faq .faq-fold__no {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  color: var(--muted);
  transition: color 200ms var(--ease);
}

.page-faq .faq-fold[open] .faq-fold__no {
  color: var(--cyan);
}

.page-faq .faq-fold__title {
  font-size: 16px;
  font-weight: 500;
  line-height: 1.6;
  color: var(--paper);
}

.page-faq .faq-fold__cue {
  justify-self: end;
  width: 9px;
  height: 9px;
  border-right: 1px solid var(--cyan-deep);
  border-bottom: 1px solid var(--cyan-deep);
  transform: rotate(45deg);
  transition: transform 220ms var(--ease), border-color 220ms var(--ease);
}

.page-faq .faq-fold[open] .faq-fold__cue {
  transform: rotate(225deg);
  border-color: var(--cyan);
}

.page-faq .faq-fold__body {
  padding: 0 0 20px 46px;
}

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

.page-faq .faq-steps__item {
  position: relative;
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 0 12px;
  padding-bottom: 16px;
}

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

.page-faq .faq-steps__item::before {
  content: "";
  position: absolute;
  left: 14px;
  top: 28px;
  bottom: 0;
  width: 1px;
  background: var(--line);
}

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

.page-faq .faq-steps__no {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border: 1px solid var(--line);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  color: var(--cyan);
}

.page-faq .faq-steps__text {
  margin: 0;
  padding-top: 3px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 32em;
}

/* 按钮行 */
.page-faq .faq-act {
  margin: 26px 0 0;
}

.page-faq .faq-act .se-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

/* 路径图 */
.page-faq .faq-pathwrap {
  margin-top: 30px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-path {
  display: block;
  width: 100%;
  height: auto;
  max-width: 600px;
}

.page-faq .faq-path__line {
  fill: none;
  stroke: var(--cyan-deep);
  stroke-width: 1.5;
  stroke-dasharray: 5 4;
}

.page-faq .faq-path__dot {
  fill: var(--ink);
  stroke: var(--cyan);
  stroke-width: 1.5;
}

.page-faq .faq-pathsteps {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-faq .faq-pathsteps__item {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 0 12px;
  align-items: baseline;
}

.page-faq .faq-pathsteps__no {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  color: var(--cyan);
}

.page-faq .faq-pathsteps__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

/* 相关入口 */
.page-faq .faq-refs {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 30px;
  margin-top: clamp(40px, 6vw, 64px);
  padding-top: 22px;
  border-top: 1px solid var(--line-soft);
  font-size: 14px;
}

.page-faq .faq-refs a {
  color: var(--cyan);
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 1px solid var(--line);
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-faq .faq-refs a:hover {
  color: var(--paper);
  border-color: var(--paper);
}

.page-faq a:focus-visible,
.page-faq summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

@media (min-width: 960px) {
  .page-faq .faq-body {
    grid-template-columns: minmax(0, 1fr) var(--faq-aside-w);
    align-items: start;
  }

  .page-faq .faq-aside {
    display: block;
    position: sticky;
    top: 96px;
  }

  .page-faq .faq-pathsteps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .page-faq .faq-sign {
    padding: 18px 22px;
  }

  .page-faq .faq-fold__body {
    padding-left: 46px;
    padding-right: clamp(0px, 4vw, 48px);
  }
}

@media (max-width: 560px) {
  .page-faq .faq-hero__inner {
    padding-left: 16px;
    padding-right: 16px;
  }

  .page-faq .faq-chip {
    padding: 9px 22px 9px 12px;
    font-size: 13px;
  }

  .page-faq .faq-fold__body {
    padding-left: 0;
  }

  .page-faq .faq-sign {
    grid-template-columns: 26px minmax(0, 1fr);
    padding: 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-chip,
  .page-faq .faq-fold,
  .page-faq .faq-fold__cue,
  .page-faq .faq-refs a {
    transition: none;
  }

  .page-faq .faq-chip:hover {
    transform: none;
  }
}