/* ===== 使用指南 / 页面专属样式（作用域 .page-faq） ===== */

.page-faq {
  --faq-index-w: 248px;
  --faq-anchor-gap: 118px;
  padding-bottom: 0;
  background:
    radial-gradient(90% 55% at 8% 0%, rgba(16, 32, 58, 0.85) 0%, rgba(5, 11, 20, 0) 62%),
    var(--ink-950);
}

.page-faq .faq-hero__lead .display,
.page-faq .h2,
.page-faq .h3,
.page-faq .faq-changes__name,
.page-faq .faq-item__title,
.page-faq .faq-path__name {
  color: var(--paper-050);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: 32px 0 64px;
  border-bottom: 1px solid var(--line-500);
  background: linear-gradient(180deg, rgba(16, 32, 58, 0.7) 0%, rgba(5, 11, 20, 0) 100%);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--grid-overlay) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-overlay) 1px, transparent 1px);
  background-size: 64px 64px;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), rgba(0, 0, 0, 0));
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), rgba(0, 0, 0, 0));
}

.page-faq .faq-hero > .shell {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 36px;
  margin-top: 32px;
}

.page-faq .faq-hero__inner .display {
  margin: 16px 0 18px;
  letter-spacing: -0.02em;
}

.page-faq .faq-hero__lead .lede {
  max-width: 44ch;
  color: var(--muted-450);
}

.page-faq .faq-hero__panel {
  border: 1px solid var(--line-500);
  background: linear-gradient(180deg, rgba(16, 32, 58, 0.92) 0%, rgba(10, 21, 36, 0.92) 100%);
}

.page-faq .faq-hero__status {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 0;
  padding: 12px 18px;
  border-bottom: 1px solid var(--line-500);
  font-size: 13px;
  line-height: 1.5;
  color: var(--cyan-200);
}

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

.page-faq .faq-hero__cell {
  padding: 18px;
  border-bottom: 1px solid var(--line-500);
  border-right: 1px solid var(--line-500);
}

.page-faq .faq-hero__cell:nth-child(2n) {
  border-right: 0;
}

.page-faq .faq-hero__cell:nth-last-child(-n + 2) {
  border-bottom: 0;
}

.page-faq .faq-hero__value {
  display: block;
  font-size: 26px;
  line-height: 1.15;
  color: var(--paper-050);
}

.page-faq .faq-hero__value--cyan {
  color: var(--cyan-400);
}

.page-faq .faq-hero__label {
  display: block;
  margin-top: 5px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--muted-450);
}

/* ---------- 版本变更 ---------- */
.page-faq .faq-changes__head {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-bottom: 34px;
}

.page-faq .faq-changes__note {
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted-450);
}

.page-faq .faq-changes__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-500);
}

.page-faq .faq-changes__row {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 6px 14px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line-500);
  transition: background-color 160ms var(--ease), border-color 160ms var(--ease);
}

.page-faq .faq-changes__row:hover {
  background: rgba(47, 230, 208, 0.05);
  border-color: var(--cyan-400);
}

.page-faq .faq-changes__n {
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--orange-500);
  padding-top: 4px;
}

.page-faq .faq-changes__name {
  margin: 0;
  font-size: 19px;
  font-weight: 700;
  line-height: 1.4;
}

.page-faq .faq-changes__scope {
  grid-column: 2;
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted-450);
}

.page-faq .faq-changes__where {
  grid-column: 2;
  justify-self: start;
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan-400);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 160ms var(--ease);
}

.page-faq .faq-changes__where:hover,
.page-faq .faq-changes__where:focus-visible {
  border-bottom-color: var(--cyan-400);
}

/* ---------- 问答区 ---------- */
.page-faq .faq-qa__head {
  max-width: 62ch;
  margin-bottom: 30px;
}

.page-faq .faq-qa__sub {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted-450);
}

.page-faq .faq-dirs {
  margin-bottom: 40px;
}

.page-faq .faq-qa__layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
}

.page-faq .faq-index {
  border: 1px solid var(--line-500);
  background: var(--ink-850);
  padding: 18px 16px;
}

.page-faq .faq-index__head {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.3em;
  color: var(--cyan-200);
}

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

.page-faq .faq-index__link {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 8px;
  padding: 9px 10px;
  font-size: 15px;
  line-height: 1.5;
  color: var(--muted-450);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color 160ms var(--ease), border-color 160ms var(--ease), background-color 160ms var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--paper-050);
  border-left-color: var(--cyan-400);
  background: rgba(47, 230, 208, 0.07);
}

.page-faq .faq-index__n {
  font-size: 12px;
  color: var(--orange-500);
  padding-top: 2px;
}

.page-faq .faq-index__foot {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line-500);
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted-450);
}

.page-faq .faq-index__foot a,
.page-faq .faq-steps a,
.page-faq .faq-path__desc a,
.page-faq .note a {
  color: var(--cyan-400);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 230, 208, 0.4);
}

.page-faq .faq-index__foot a:hover,
.page-faq .faq-steps a:hover,
.page-faq .faq-path__desc a:hover,
.page-faq .note a:hover {
  border-bottom-color: var(--cyan-400);
}

.page-faq .faq-list {
  display: grid;
  gap: 12px;
}

.page-faq .faq-item {
  border: 1px solid var(--line-500);
  background: var(--ink-850);
  scroll-margin-top: var(--faq-anchor-gap);
  transition: border-color 160ms var(--ease), background-color 160ms var(--ease);
}

.page-faq .faq-item[open] {
  border-color: var(--cyan-400);
  background: var(--ink-750);
}

.page-faq .faq-item__summary {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr) 20px;
  align-items: center;
  gap: 12px;
  padding: 17px 18px;
  cursor: pointer;
  list-style: none;
  transition: background-color 160ms var(--ease);
}

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

.page-faq .faq-item__summary:hover {
  background: rgba(47, 230, 208, 0.05);
}

.page-faq .faq-item__n {
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--orange-500);
}

.page-faq .faq-item__title {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
}

.page-faq .faq-item__mark {
  position: relative;
  justify-self: end;
  width: 14px;
  height: 14px;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--orange-500);
  transform: translate(-50%, -50%);
  transition: opacity 160ms var(--ease), background-color 160ms var(--ease);
}

.page-faq .faq-item__mark::before {
  width: 14px;
  height: 2px;
}

.page-faq .faq-item__mark::after {
  width: 2px;
  height: 14px;
}

.page-faq .faq-item[open] .faq-item__mark::before {
  background: var(--cyan-400);
}

.page-faq .faq-item[open] .faq-item__mark::after {
  opacity: 0;
}

.page-faq .faq-item__body {
  padding: 18px 18px 24px;
  border-top: 1px solid var(--line-500);
}

.page-faq .faq-verdict {
  margin: 0 0 14px;
  padding: 12px 14px;
  border-left: 3px solid var(--cyan-400);
  background: rgba(47, 230, 208, 0.09);
  font-size: 15px;
  line-height: 1.75;
  color: var(--paper-050);
}

.page-faq .copy-btn {
  margin: 0 0 18px;
  padding: 7px 14px;
  border: 1px solid var(--line-500);
  background: transparent;
  color: var(--muted-450);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: border-color 160ms var(--ease), color 160ms var(--ease);
}

.page-faq .copy-btn:hover,
.page-faq .copy-btn:focus-visible {
  border-color: var(--cyan-400);
  color: var(--cyan-400);
}

.page-faq .faq-steps,
.page-faq .faq-record__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-steps li,
.page-faq .faq-record__list li {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  font-size: 15px;
  line-height: 1.75;
  color: var(--paper-050);
}

.page-faq .faq-steps li .num,
.page-faq .faq-record__list li .num {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cyan-400);
  padding-top: 3px;
}

/* ---------- 排查路径 ---------- */
.page-faq .faq-path__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 36px;
}

.page-faq .faq-path__lede {
  margin: 14px 0 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted-450);
}

.page-faq .faq-path__track {
  margin: 30px 0 22px;
  padding: 10px 0;
  border-top: 1px solid var(--line-500);
  border-bottom: 1px solid var(--line-500);
  background-image: linear-gradient(var(--grid-overlay) 1px, transparent 1px);
  background-size: 100% 18px;
}

.page-faq .faq-path__track svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-faq .faq-path__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
}

.page-faq .faq-path__step {
  border-top: 2px solid var(--line-500);
  padding-top: 14px;
  transition: border-color 160ms var(--ease);
}

.page-faq .faq-path__step:hover {
  border-top-color: var(--cyan-400);
}

.page-faq .faq-path__node {
  display: block;
  margin-bottom: 6px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--orange-500);
}

.page-faq .faq-path__name {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
}

.page-faq .faq-path__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted-450);
}

.page-faq .faq-path__figure {
  margin: 0;
  max-width: 420px;
  background: var(--ink-750);
}

.page-faq .faq-path__figure .figure__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 使用记录 ---------- */
.page-faq .faq-record__head {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-bottom: 30px;
}

.page-faq .faq-record__note {
  margin: 14px 0 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted-450);
}

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

.page-faq .faq-record__card {
  border: 1px solid var(--line-500);
  background: linear-gradient(180deg, var(--ink-750) 0%, var(--ink-850) 100%);
  padding: 22px 20px;
  transition: border-color 160ms var(--ease), transform 160ms var(--ease);
}

.page-faq .faq-record__card:hover {
  border-color: var(--cyan-400);
  transform: translateY(-2px);
}

.page-faq .faq-record__tag {
  display: inline-block;
  margin: 0 0 14px;
  padding: 4px 9px;
  border: 1px solid var(--line-500);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--cyan-200);
}

.page-faq .faq-record__card .h3 {
  margin: 0 0 8px;
}

.page-faq .faq-record__desc {
  margin: 0 0 16px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted-450);
}

.page-faq .faq-record__foot {
  margin: 24px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--line-500);
}

/* ---------- 人工协助 ---------- */
.page-faq .faq-help {
  margin-top: 96px;
  padding: 64px 0 96px;
  border-top: 1px solid var(--line-500);
  background: linear-gradient(180deg, rgba(16, 32, 58, 0.55) 0%, rgba(5, 11, 20, 0) 100%);
}

.page-faq .faq-help__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
}

.page-faq .faq-help__text {
  margin: 14px 0 22px;
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted-450);
}

.page-faq .faq-help__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-500);
}

.page-faq .faq-help__list li {
  display: grid;
  grid-template-columns: 18px minmax(0, 1fr);
  gap: 14px;
  padding: 15px 0;
  border-bottom: 1px solid var(--line-500);
  font-size: 15px;
  line-height: 1.75;
  color: var(--paper-050);
}

.page-faq .faq-help__list li::before {
  content: "";
  width: 8px;
  height: 8px;
  margin-top: 9px;
  background: var(--cyan-400);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-hero__cell {
    padding: 20px 22px;
  }

  .page-faq .faq-hero__value {
    font-size: 30px;
  }

  .page-faq .faq-item__summary {
    grid-template-columns: 44px minmax(0, 1fr) 20px;
    padding: 18px 22px;
  }

  .page-faq .faq-item__body {
    padding: 20px 22px 26px 78px;
  }

  .page-faq .faq-record__card {
    padding: 26px 24px;
  }
}

@media (min-width: 820px) {
  .page-faq .faq-changes__head,
  .page-faq .faq-record__head {
    grid-template-columns: 92px minmax(0, 1fr);
    gap: 32px;
    align-items: start;
  }

  .page-faq .faq-changes__row {
    grid-template-columns: 56px minmax(0, 190px) minmax(0, 1fr) 104px;
    gap: 0 26px;
    align-items: baseline;
    padding: 22px 0;
  }

  .page-faq .faq-changes__n {
    padding-top: 0;
  }

  .page-faq .faq-changes__scope,
  .page-faq .faq-changes__where {
    grid-column: 3;
  }

  .page-faq .faq-changes__where {
    grid-column: 4;
    grid-row: 1;
    justify-self: end;
    margin-top: 0;
  }

  .page-faq .faq-path__steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 26px 30px;
  }

  .page-faq .faq-record__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 26px;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-hero {
    padding: 40px 0 78px;
  }

  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 58px;
    align-items: end;
    margin-top: 46px;
  }

  .page-faq .faq-hero__inner .display {
    margin: 18px 0 22px;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-qa__layout {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    gap: 44px;
    align-items: start;
  }

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

  .page-faq .faq-path__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 56px;
    align-items: start;
  }

  .page-faq .faq-help__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 64px;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-path__steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0 24px;
  }

  .page-faq .faq-path__step:nth-child(2) {
    padding-top: 34px;
  }

  .page-faq .faq-path__step:nth-child(3) {
    padding-top: 16px;
  }

  .page-faq .faq-path__step:nth-child(4) {
    padding-top: 50px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-changes__row,
  .page-faq .faq-index__link,
  .page-faq .faq-item,
  .page-faq .faq-item__summary,
  .page-faq .faq-item__mark::before,
  .page-faq .faq-item__mark::after,
  .page-faq .faq-record__card,
  .page-faq .faq-path__step,
  .page-faq .copy-btn {
    transition: none;
  }

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