/* ============ 使用指南 / page-faq ============ */
.page-faq {
  --faq-rail-w: 108px;
  color: var(--ky-chalk);
}

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

.page-faq .ky-breadcrumb {
  margin-top: 22px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  display: grid;
  gap: 20px;
  padding: 26px 0 34px;
  border-bottom: 1px solid var(--ky-line);
}

.page-faq .faq-hero__rail {
  display: flex;
  align-items: center;
  gap: 14px;
  font-family: var(--ky-font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--ky-mute);
}

.page-faq .faq-hero__rail::after {
  content: "";
  flex: 0 0 auto;
  width: 32px;
  height: 1px;
  background: var(--ky-amber);
}

.page-faq .faq-hero__title {
  margin: 10px 0 16px;
  font-size: clamp(29px, 6vw, 52px);
  line-height: 1.07;
  letter-spacing: -0.015em;
  max-width: 22ch;
}

.page-faq .faq-hero__lede {
  margin: 0 0 22px;
  max-width: 64ch;
}

.page-faq .faq-jump {
  list-style: none;
  margin: 0;
  padding: 14px 0 0;
  display: flex;
  flex-wrap: wrap;
  border-top: 1px solid var(--ky-line-soft);
}

.page-faq .faq-jump__item {
  display: flex;
  align-items: center;
  margin: 4px 0;
}

.page-faq .faq-jump__item + .faq-jump__item::before {
  content: "";
  width: 1px;
  height: 13px;
  background: var(--ky-line);
  margin: 0 14px;
}

.page-faq .faq-jump__link {
  font-family: var(--ky-font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--ky-mute);
  text-decoration: none;
  transition: color 200ms var(--ky-ease);
}

.page-faq .faq-jump__link:hover,
.page-faq .faq-jump__link:focus-visible {
  color: var(--ky-signal);
}

.page-faq .faq-jump__num {
  color: var(--ky-amber);
  margin-right: 8px;
}

@media (min-width: 960px) {
  .page-faq .faq-hero {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: 44px;
    padding: 54px 0 66px;
  }

  .page-faq .faq-hero__rail {
    flex-direction: column;
    align-items: flex-start;
    gap: 22px;
    padding-right: 22px;
    border-right: 1px solid var(--ky-line);
    align-self: stretch;
  }

  .page-faq .faq-hero__rail-text {
    writing-mode: vertical-rl;
    letter-spacing: 0.38em;
  }

  .page-faq .faq-hero__rail::after {
    width: 1px;
    height: 44px;
  }
}

/* ---------- 章节块 ---------- */
.page-faq .faq-block {
  padding: 38px 0;
  border-bottom: 1px solid var(--ky-line-soft);
}

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

.page-faq .faq-block__title {
  margin: 10px 0 12px;
  font-size: clamp(22px, 3.6vw, 34px);
  line-height: 1.18;
}

.page-faq .faq-block__lede {
  margin: 0;
  max-width: 66ch;
}

@media (min-width: 900px) {
  .page-faq .faq-block {
    padding: 56px 0;
  }

  .page-faq .faq-block__head {
    margin-bottom: 34px;
  }
}

/* ---------- 三档索引 ---------- */
.page-faq .faq-index__tabs {
  margin-top: 4px;
}

.page-faq .ky-tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--ky-line);
  margin-bottom: 0;
}

.page-faq .ky-tabs__tab {
  appearance: none;
  border: 1px solid var(--ky-line);
  background: transparent;
  color: var(--ky-mute);
  font-family: var(--ky-font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  padding: 9px 16px;
  border-radius: var(--ky-radius);
  cursor: pointer;
  transition: color 200ms var(--ky-ease), background 200ms var(--ky-ease), border-color 200ms var(--ky-ease);
}

.page-faq .ky-tabs__tab:hover {
  color: var(--ky-chalk);
  border-color: var(--ky-signal);
}

.page-faq .ky-tabs__tab:focus-visible {
  outline: 2px solid var(--ky-signal);
  outline-offset: 2px;
}

.page-faq .ky-tabs__tab.is-active,
.page-faq .ky-tabs__tab[aria-selected="true"] {
  color: var(--ky-field);
  background: var(--ky-signal);
  border-color: var(--ky-signal);
  font-weight: 700;
}

.page-faq .ky-tabs__panel {
  display: none;
}

.page-faq .ky-tabs__panel.is-active {
  display: block;
}

.page-faq .faq-index__tabs .ky-table__wrap {
  margin-top: 4px;
}

.page-faq .faq-entry-table {
  width: 100%;
  font-size: 13.5px;
}

.page-faq .faq-entry-table th[scope="row"] {
  text-align: left;
  font-weight: 600;
  color: var(--ky-chalk);
  white-space: nowrap;
}

.page-faq .faq-entry-table td {
  color: var(--ky-mute);
  vertical-align: top;
}

.page-faq .faq-entry-link {
  color: var(--ky-signal);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 200ms var(--ky-ease);
}

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

/* ---------- 字段读法 ---------- */
.page-faq .faq-fields__grid {
  display: grid;
  gap: 30px;
}

.page-faq .faq-field-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--ky-line);
}

.page-faq .faq-field {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 14px;
  padding: 16px 0;
  border-bottom: 1px solid var(--ky-line-soft);
}

.page-faq .faq-field__idx {
  font-family: var(--ky-font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ky-amber);
  padding-top: 3px;
}

.page-faq .faq-field__name {
  margin: 0 0 4px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--ky-chalk);
}

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

.page-faq .faq-fields__fig {
  margin: 0;
}

@media (min-width: 1000px) {
  .page-faq .faq-fields__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 52px;
    align-items: start;
  }

  .page-faq .faq-fields__fig {
    position: sticky;
    top: 96px;
  }
}

/* ---------- 查找路径 ---------- */
.page-faq .faq-path {
  display: grid;
  gap: 16px;
  padding: 22px 0;
  border-top: 1px solid var(--ky-line-soft);
}

.page-faq .faq-path:first-of-type {
  border-top-color: var(--ky-line);
}

.page-faq .faq-path__title {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ky-chalk);
}

.page-faq .faq-path__title span {
  display: block;
  margin-top: 7px;
  font-family: var(--ky-font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--ky-mute);
}

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

.page-faq .faq-path__step {
  position: relative;
  margin: 0;
  padding-left: 30px;
}

.page-faq .faq-path__step::after {
  content: "";
  position: absolute;
  left: 10px;
  top: 24px;
  bottom: -18px;
  width: 1px;
  background: var(--ky-line);
}

.page-faq .faq-path__step:last-child::after {
  display: none;
}

.page-faq .faq-path__node {
  position: absolute;
  left: 0;
  top: 0;
  width: 20px;
  height: 20px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--ky-signal);
  color: var(--ky-field);
  font-family: var(--ky-font-mono);
  font-size: 11px;
  font-weight: 700;
}

.page-faq .faq-path__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.68;
  color: var(--ky-mute);
}

.page-faq .faq-paths__fig {
  margin: 32px 0 0;
}

@media (min-width: 900px) {
  .page-faq .faq-path {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 40px;
    align-items: start;
    padding: 26px 0;
  }

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

  .page-faq .faq-path__step {
    padding-left: 0;
    padding-top: 30px;
  }

  .page-faq .faq-path__step::after {
    left: 26px;
    right: 0;
    top: 10px;
    bottom: auto;
    width: auto;
    height: 1px;
  }
}

/* ---------- 更新时间线 ---------- */
.page-faq .faq-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--ky-line);
}

.page-faq .faq-timeline__item {
  display: grid;
  gap: 8px;
  padding: 18px 0;
  border-bottom: 1px solid var(--ky-line-soft);
}

.page-faq .faq-timeline__time {
  font-family: var(--ky-font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--ky-amber);
}

.page-faq .faq-timeline__title {
  margin: 0 0 5px;
  font-size: 16px;
  font-weight: 700;
  color: var(--ky-chalk);
}

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

@media (min-width: 760px) {
  .page-faq .faq-timeline__item {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: 40px;
    align-items: baseline;
    padding: 20px 0;
  }
}

/* ---------- 折叠补充说明 ---------- */
.page-faq .faq-note {
  margin-top: 26px;
  border: 1px solid var(--ky-line);
  border-left: 3px solid var(--ky-amber);
  background: rgba(14, 51, 42, 0.55);
}

.page-faq .faq-note__summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 15px 18px;
  font-size: 15px;
  font-weight: 600;
  color: var(--ky-chalk);
}

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

.page-faq .faq-note__summary::after {
  content: "+";
  font-family: var(--ky-font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--ky-signal);
}

.page-faq .faq-note[open] .faq-note__summary::after {
  content: "−";
}

.page-faq .faq-note__summary:focus-visible {
  outline: 2px solid var(--ky-signal);
  outline-offset: 2px;
}

.page-faq .faq-note__body {
  padding: 0 18px 18px;
  font-size: 14px;
  line-height: 1.74;
  color: var(--ky-mute);
}

.page-faq .faq-note__body p {
  margin: 0;
  max-width: 68ch;
}

/* ---------- 术语表 ---------- */
.page-faq .faq-terms {
  margin: 0;
  display: grid;
  border-top: 1px solid var(--ky-line);
}

.page-faq .faq-term {
  display: grid;
  grid-template-columns: minmax(84px, 112px) minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  margin: 0;
  padding: 11px 0;
  border-bottom: 1px solid var(--ky-line-soft);
}

.page-faq .faq-term__key {
  margin: 0;
  font-family: var(--ky-font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--ky-chalk);
}

.page-faq .faq-term__val {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.66;
  color: var(--ky-mute);
}

@media (min-width: 1040px) {
  .page-faq .faq-terms {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 56px;
  }
}

/* ---------- 联系引导 ---------- */
.page-faq .faq-help {
  border-bottom: none;
  padding-bottom: 56px;
}

.page-faq .faq-help__panel {
  display: grid;
  gap: 20px;
  padding: 22px 20px;
  border-left: 3px solid var(--ky-signal);
  background: linear-gradient(90deg, var(--ky-signal-soft), transparent 66%);
}

.page-faq .faq-help__text {
  margin: 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ky-chalk);
}

.page-faq .faq-help__panel .ky-btn {
  justify-self: start;
}

@media (min-width: 880px) {
  .page-faq .faq-help__panel {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 48px;
    padding: 30px 34px;
  }
}

@media (max-width: 480px) {
  .page-faq .faq-jump__item + .faq-jump__item::before {
    margin: 0 10px;
  }

  .page-faq .faq-term {
    grid-template-columns: 1fr;
    gap: 4px;
  }
}

/* ---------- 减弱动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::after,
  .page-faq *::before {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}