.page-faq {
  --faq-panel: var(--ink-2);
  --faq-nav-w: 224px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: 30px 0 30px;
  background:
    radial-gradient(120% 100% at 88% -20%, rgba(53, 240, 192, .18), transparent 62%),
    radial-gradient(90% 80% at 4% 110%, rgba(245, 185, 66, .10), transparent 60%),
    linear-gradient(180deg, var(--ink-3), var(--ink));
  border-bottom: 1px solid var(--line-soft);
  overflow: hidden;
}

.page-faq .faq-hero .breadcrumb {
  margin-bottom: 26px;
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: 26px;
  align-items: end;
}

.page-faq .faq-hero__lead .h1 {
  margin: 12px 0 16px;
}

.page-faq .faq-hero__lead .lede {
  max-width: 46ch;
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-faq .faq-hero__panel {
  border: 1px solid var(--line-mint);
  border-radius: var(--r-xl);
  background: linear-gradient(180deg, rgba(53, 240, 192, .09), rgba(18, 34, 54, .92));
  padding: 22px 22px 20px;
  box-shadow: var(--shadow);
}

.page-faq .faq-hero__panel-k {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--mint);
  font-family: var(--mono);
  text-transform: uppercase;
}

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

.page-faq .faq-hero__list li {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  align-items: baseline;
  gap: 10px;
  font-size: 14px;
  color: var(--chalk);
  line-height: 1.55;
}

.page-faq .faq-hero__num {
  font-size: 20px;
  color: var(--mint);
  letter-spacing: .02em;
}

.page-faq .faq-hero__panel-note {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
  font-size: 13px;
  color: var(--slate);
  line-height: 1.65;
}

/* ---------- 四步上手 ---------- */
.page-faq .faq-steps__figure {
  margin: 0 0 30px;
}

.page-faq .faq-steps__figure img {
  width: 100%;
  height: auto;
  object-fit: cover;
}

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

.page-faq .faq-step {
  position: relative;
  padding: 22px 20px 20px;
  background: var(--faq-panel);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  transition: border-color var(--t) var(--ease), transform var(--t) var(--ease);
}

.page-faq .faq-step::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg, var(--mint), rgba(53, 240, 192, .04));
}

.page-faq .faq-step:hover {
  border-color: var(--line-mint);
  transform: translateY(-3px);
}

.page-faq .faq-step__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  margin: 0 0 16px;
  border-radius: 50%;
  border: 1px solid var(--line-mint);
  color: var(--mint);
  font-size: 14px;
  background: rgba(53, 240, 192, .06);
}

.page-faq .faq-step__title {
  margin: 0 0 8px;
  font-size: 19px;
  line-height: 1.4;
  color: var(--chalk);
}

.page-faq .faq-step__time {
  margin: 0 0 12px;
  font-size: 12.5px;
  letter-spacing: .08em;
  color: var(--amber);
}

.page-faq .faq-step__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--slate);
}

.page-faq .faq-step__done {
  position: relative;
  margin: 16px 0 0;
  padding-left: 18px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--chalk);
  border-top: 1px solid var(--line-soft);
  padding-top: 14px;
}

.page-faq .faq-step__done::before {
  content: "";
  position: absolute;
  left: 0;
  top: 21px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--mint);
  box-shadow: 0 0 0 4px rgba(53, 240, 192, .14);
}

/* ---------- 章节导读 ---------- */
.page-faq .faq-chapters__grid {
  display: grid;
  gap: 14px;
}

.page-faq .faq-chapter {
  display: flex;
  flex-direction: column;
  padding: 20px;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-lg);
  background: var(--faq-panel);
  transition: border-color var(--t) var(--ease), background var(--t) var(--ease);
}

.page-faq .faq-chapter:hover {
  border-color: var(--line-mint);
  background: linear-gradient(180deg, rgba(53, 240, 192, .05), var(--faq-panel));
}

.page-faq .faq-chapter--deep:hover {
  border-color: var(--line-amber);
  background: linear-gradient(180deg, rgba(245, 185, 66, .06), var(--faq-panel));
}

.page-faq .faq-chapter__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.page-faq .faq-chapter__num {
  font-size: 22px;
  color: var(--mint);
  letter-spacing: .04em;
}

.page-faq .faq-chapter__tag {
  display: inline-block;
  padding: 4px 10px;
  border-radius: var(--pill);
  border: 1px solid var(--line-mint);
  background: rgba(53, 240, 192, .08);
  color: var(--mint);
  font-size: 11px;
  letter-spacing: .08em;
  white-space: nowrap;
}

.page-faq .faq-chapter__tag--deep {
  border-color: var(--line-amber);
  background: rgba(245, 185, 66, .1);
  color: var(--amber);
}

.page-faq .faq-chapter__title {
  margin: 0 0 8px;
  font-size: 17px;
  color: var(--chalk);
  line-height: 1.45;
}

.page-faq .faq-chapter__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--slate);
}

/* ---------- 问题分册布局 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: 28px;
}

.page-faq .faq-tocnav {
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--faq-panel);
  padding: 18px 16px 14px;
}

.page-faq .faq-tocnav__title {
  margin: 0 0 10px;
  padding: 0 12px;
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--slate);
  font-family: var(--mono);
  text-transform: uppercase;
}

.page-faq .faq-tocnav__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-tocnav__list a {
  display: block;
  padding: 10px 12px;
  border-radius: var(--r-sm);
  border-left: 2px solid transparent;
  color: var(--slate);
  font-size: 14px;
  text-decoration: none;
  transition: color var(--t) var(--ease), background var(--t) var(--ease), border-color var(--t) var(--ease);
}

.page-faq .faq-tocnav__list a:hover,
.page-faq .faq-tocnav__list a:focus-visible {
  color: var(--chalk);
  background: rgba(53, 240, 192, .07);
  border-left-color: var(--mint);
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: 96px;
}

.page-faq .faq-group + .faq-group {
  margin-top: 46px;
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 12px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group__num {
  font-size: 13px;
  letter-spacing: .16em;
  color: var(--mint);
}

.page-faq .faq-group__head .h3 {
  margin: 0;
  font-size: 21px;
  color: var(--chalk);
}

.page-faq .faq-group__intro {
  margin: -6px 0 18px;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--slate);
  max-width: 60ch;
}

.page-faq .accordion {
  display: grid;
  gap: 10px;
}

.page-faq .accordion__item {
  border: 1px solid var(--line-soft);
  border-radius: var(--r-lg);
  background: var(--faq-panel);
  overflow: hidden;
  transition: border-color var(--t) var(--ease), background var(--t) var(--ease);
}

.page-faq .accordion__item:hover {
  border-color: var(--line);
}

.page-faq .accordion__item[data-open],
.page-faq .accordion__item:has([aria-expanded="true"]) {
  border-color: var(--line-mint);
  background: linear-gradient(180deg, rgba(53, 240, 192, .05), var(--faq-panel));
}

.page-faq .accordion__trigger {
  width: 100%;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  padding: 18px 20px;
  background: transparent;
  border: 0;
  color: var(--chalk);
  font-family: var(--head);
  font-size: 16px;
  line-height: 1.5;
  text-align: left;
  cursor: pointer;
  transition: color var(--t) var(--ease);
}

.page-faq .accordion__trigger:hover {
  color: var(--mint);
}

.page-faq .accordion__icon {
  position: relative;
  flex: 0 0 auto;
  width: 20px;
  height: 20px;
  margin-top: 3px;
}

.page-faq .accordion__icon::before,
.page-faq .accordion__icon::after {
  content: "";
  position: absolute;
  background: var(--mint);
  border-radius: 2px;
  transition: transform var(--t) var(--ease), opacity var(--t) var(--ease);
}

.page-faq .accordion__icon::before {
  left: 0;
  top: 9px;
  width: 20px;
  height: 2px;
}

.page-faq .accordion__icon::after {
  left: 9px;
  top: 0;
  width: 2px;
  height: 20px;
}

.page-faq .accordion__item[data-open] .accordion__icon::after,
.page-faq .accordion__item:has([aria-expanded="true"]) .accordion__icon::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .accordion__panel {
  overflow: hidden;
}

.page-faq .accordion__inner {
  padding: 0 20px 20px;
  border-top: 1px solid var(--line-soft);
  margin-top: 2px;
  padding-top: 14px;
}

.page-faq .accordion__inner p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--slate);
  max-width: 62ch;
}

/* ---------- 筛选对照 ---------- */
.page-faq .faq-example {
  display: grid;
  gap: 10px;
  margin-top: 18px;
  padding: 16px 18px;
  border: 1px dashed var(--line-mint);
  border-radius: var(--r-md);
  background: rgba(53, 240, 192, .04);
}

.page-faq .faq-example__row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  align-items: baseline;
  justify-content: space-between;
}

.page-faq .faq-example__cond {
  font-size: 12.5px;
  color: var(--chalk);
  line-height: 1.6;
  word-break: break-word;
}

.page-faq .faq-example__hit {
  font-size: 12.5px;
  color: var(--amber);
  white-space: nowrap;
}

.page-faq .faq-example__hit--zero {
  color: var(--clay);
}

/* ---------- 术语 ---------- */
.page-faq .faq-glossary__figure {
  margin: 0 0 22px;
}

.page-faq .faq-glossary__figure img {
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq .faq-glossary {
  display: grid;
  gap: 10px;
}

.page-faq .faq-term {
  display: grid;
  gap: 6px;
  padding: 16px 18px;
  background: var(--faq-panel);
  border: 1px solid var(--line-soft);
  border-left: 2px solid var(--mint);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  transition: background var(--t) var(--ease), border-color var(--t) var(--ease);
}

.page-faq .faq-term:hover {
  background: rgba(53, 240, 192, .05);
  border-left-color: var(--amber);
}

.page-faq .faq-term__key {
  margin: 0;
  font-family: var(--mono);
  font-size: 14px;
  letter-spacing: .05em;
  color: var(--mint);
}

.page-faq .faq-term__val {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--slate);
}

/* ---------- 收尾 ---------- */
.page-faq .faq-closing__panel {
  position: relative;
  padding: 34px 26px 30px;
  border-radius: var(--r-xl);
  border: 1px solid var(--line-mint);
  background:
    radial-gradient(120% 140% at 100% 0%, rgba(53, 240, 192, .16), transparent 58%),
    radial-gradient(90% 120% at 0% 100%, rgba(245, 185, 66, .12), transparent 60%),
    linear-gradient(180deg, var(--ink-2), var(--ink-3));
  overflow: hidden;
}

.page-faq .faq-closing__panel .h2 {
  margin: 10px 0 14px;
}

.page-faq .faq-closing__text {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--slate);
}

.page-faq .faq-closing__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

/* ---------- 中等屏幕 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-term {
    grid-template-columns: 168px minmax(0, 1fr);
    gap: 22px;
    align-items: baseline;
  }
}

@media (min-width: 760px) {
  .page-faq .faq-hero {
    padding: 40px 0 46px;
  }

  .page-faq .faq-steps__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

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

  .page-faq .faq-closing__panel {
    padding: 46px 40px 40px;
  }
}

/* ---------- 桌面端 ---------- */
@media (min-width: 1000px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, .9fr);
    gap: 48px;
  }

  .page-faq .faq-steps__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-faq .faq-body {
    grid-template-columns: var(--faq-nav-w) minmax(0, 1fr);
    gap: 46px;
    align-items: start;
  }

  .page-faq .faq-tocnav {
    position: sticky;
    top: 88px;
  }

  .page-faq .faq-glossary {
    gap: 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-step,
  .page-faq .faq-chapter,
  .page-faq .faq-term,
  .page-faq .accordion__item,
  .page-faq .accordion__icon::before,
  .page-faq .accordion__icon::after,
  .page-faq .faq-tocnav__list a {
    transition: none;
  }

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