.page-faq {
  --faq-side-w: 300px;
  --faq-sticky-top: calc(var(--status-h) + 22px);
  background: var(--ink-800);
  color: var(--snow);
  padding-block: 22px 84px;
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumb {
  margin-bottom: 22px;
}

.page-faq .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  color: var(--mist);
}

.page-faq .breadcrumb-list a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .breadcrumb-list a:hover,
.page-faq .breadcrumb-list a:focus-visible {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

.page-faq .breadcrumb-list li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--ink-line);
}

.page-faq .breadcrumb-list li[aria-current="page"] {
  color: var(--snow);
}

/* ---------- 页头 ---------- */
.page-faq .faq-head {
  position: relative;
  padding: 10px 0 38px;
}

.page-faq .faq-head::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--lime), var(--cyan) 38%, transparent 88%);
}

.page-faq h1 {
  margin: 14px 0 18px;
  max-width: 19ch;
  font-family: var(--font-sans);
  font-size: clamp(29px, 6.2vw, 52px);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.012em;
  text-align: left;
  color: var(--snow);
}

.page-faq .lede {
  max-width: 66ch;
  margin: 0;
  font-size: 16px;
  line-height: 1.82;
  color: var(--mist);
}

.page-faq .faq-head-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-head-stats li {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 14px;
  font-size: 13px;
  color: var(--mist);
  background: var(--ink-700);
  border: 1px solid var(--ink-line);
  box-shadow: 3px 3px 0 rgba(6, 10, 18, 0.85);
}

.page-faq .faq-head-stats .num {
  font-family: var(--font-mono);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--lime);
}

/* ---------- 快速定位 ---------- */
.page-faq .faq-locate {
  padding-block: 46px 12px;
}

.page-faq .locate-wrap {
  display: grid;
  gap: 30px;
}

.page-faq .locate-main .section-title {
  margin: 0 0 10px;
}

.page-faq .section-note {
  margin: 0;
  max-width: 52ch;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .locate-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(146px, 1fr));
  gap: 10px;
  margin-top: 22px;
}

.page-faq .locate-cell {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 15px 16px 17px;
  text-decoration: none;
  color: var(--snow);
  background: var(--ink-700);
  border: 1px solid var(--ink-line);
  border-left: 3px solid var(--ink-line);
  box-shadow: 3px 3px 0 rgba(6, 10, 18, 0.8);
  transition: background var(--dur) var(--ease), transform var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .locate-cell:nth-child(1) { border-left-color: var(--lime); }
.page-faq .locate-cell:nth-child(2) { border-left-color: var(--cyan); }
.page-faq .locate-cell:nth-child(3) { border-left-color: var(--amber); }
.page-faq .locate-cell:nth-child(4) { border-left-color: var(--lime); }
.page-faq .locate-cell:nth-child(5) { border-left-color: var(--flame); }
.page-faq .locate-cell:nth-child(6) { border-left-color: var(--cyan); }

.page-faq .locate-cell:hover,
.page-faq .locate-cell:focus-visible {
  background: var(--ink-800);
  transform: translate(-2px, -2px);
  box-shadow: 5px 5px 0 rgba(6, 10, 18, 0.92);
  outline: none;
}

.page-faq .locate-cell:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 2px;
}

.page-faq .lc-idx {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-faq .lc-name {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.01em;
  line-height: 1.4;
}

.page-faq .locate-media {
  position: relative;
  margin: 0;
  overflow: hidden;
  background: var(--ink-900);
  border: 1px solid var(--ink-line);
  box-shadow: var(--stamp-shadow);
}

.page-faq .locate-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-faq .locate-media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(118% 92% at 72% 28%, transparent 38%, rgba(6, 10, 18, 0.78) 100%);
}

/* ---------- 问答主体 ---------- */
.page-faq .faq-body {
  padding-top: 40px;
  border-top: 1px solid var(--ink-line);
  margin-top: 42px;
}

.page-faq .faq-columns {
  display: grid;
  gap: 32px;
}

.page-faq .qa-list {
  min-width: 0;
}

.page-faq .qa-item {
  padding-left: 16px;
  padding-right: 8px;
  border-bottom: 1px solid var(--ink-line);
  border-left: 1px solid transparent;
  scroll-margin-top: var(--faq-sticky-top);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .qa-list > .qa-item:first-child {
  border-top: 1px solid var(--ink-line);
}

.page-faq .qa-item[open] {
  background: rgba(21, 32, 57, 0.5);
}

.page-faq .qa-item--flag {
  border-left-color: var(--flame);
  background: linear-gradient(100deg, rgba(255, 95, 46, 0.1), rgba(255, 95, 46, 0) 62%);
}

.page-faq .qa-item--flag .qa-idx {
  color: var(--flame);
}

.page-faq .qa-item > summary {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 22px;
  grid-template-areas:
    "head arrow"
    "q arrow";
  gap: 9px 16px;
  align-items: start;
  padding: 22px 6px 20px 0;
  cursor: pointer;
  list-style: none;
}

.page-faq .qa-item > summary::-webkit-details-marker {
  display: none;
}

.page-faq .qa-item > summary:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 3px;
}

.page-faq .qa-head {
  grid-area: head;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.page-faq .qa-idx {
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--lime);
  line-height: 1.4;
}

.page-faq .qa-cat {
  padding: 2px 8px;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--mist);
  background: rgba(34, 51, 79, 0.75);
  border: 1px solid var(--ink-line);
}

.page-faq .qa-q {
  grid-area: q;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.6;
  letter-spacing: 0.01em;
  color: var(--snow);
}

.page-faq .qa-arrow {
  grid-area: arrow;
  width: 11px;
  height: 11px;
  margin-top: 7px;
  border-right: 2px solid var(--mist);
  border-bottom: 2px solid var(--mist);
  transform: rotate(45deg);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .qa-item[open] .qa-arrow {
  transform: rotate(-135deg);
  border-color: var(--lime);
}

.page-faq .qa-a {
  margin: 0 0 26px;
  padding-left: 18px;
  border-left: 1px solid var(--ink-line);
  max-width: 68ch;
}

.page-faq .qa-a p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--mist);
}

.page-faq .qa-a p + p {
  margin-top: 10px;
}

.page-faq .qa-figure {
  margin: 18px 0 0;
  overflow: hidden;
  background: var(--ink-900);
  border: 1px solid var(--ink-line);
  box-shadow: 3px 3px 0 rgba(6, 10, 18, 0.8);
}

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

/* 三步排查内联图 */
.page-faq .triage {
  display: block;
  width: 100%;
  max-width: 380px;
  height: auto;
  margin: 20px 0 4px;
}

.page-faq .triage circle {
  fill: none;
  stroke: var(--cyan);
  stroke-width: 1.5;
}

.page-faq .triage line {
  stroke: var(--ink-line);
  stroke-width: 1.5;
  stroke-dasharray: 4 4;
}

.page-faq .triage text {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.02em;
  fill: var(--lime);
  text-anchor: middle;
}

.page-faq .triage .lbl {
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.08em;
  fill: var(--mist);
}

/* ---------- 侧栏 ---------- */
.page-faq .faq-side {
  display: grid;
  gap: 14px;
  min-width: 0;
}

.page-faq .side-card {
  padding: 22px 20px 24px;
  background: var(--ink-700);
  border: 1px solid var(--ink-line);
  border-top: 3px solid var(--lime);
  box-shadow: var(--stamp-shadow);
}

.page-faq .side-title {
  margin: 10px 0 12px;
  font-size: 19px;
  font-weight: 700;
  line-height: 1.48;
  color: var(--snow);
}

.page-faq .side-card > p {
  margin: 0 0 16px;
  font-size: 14px;
  line-height: 1.78;
  color: var(--mist);
}

.page-faq .side-mail {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin: 0 0 8px;
}

.page-faq .side-mail-label {
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

.page-faq .side-mail .mono {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.02em;
  color: var(--cyan);
  word-break: break-all;
}

.page-faq .side-hint {
  margin: 0 0 18px;
  font-size: 12.5px;
  color: var(--mist);
}

.page-faq .side-btn {
  display: inline-block;
  text-decoration: none;
}

.page-faq .side-links {
  display: grid;
  gap: 1px;
  background: var(--ink-line);
  border: 1px solid var(--ink-line);
}

.page-faq .side-links a {
  display: block;
  padding: 12px 14px;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--mist);
  text-decoration: none;
  background: var(--ink-800);
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .side-links a:hover,
.page-faq .side-links a:focus-visible {
  color: var(--lime);
  background: var(--ink-700);
  outline: none;
}

.page-faq .side-links a:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: -2px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-faq .locate-wrap {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: start;
    gap: 40px;
  }

  .page-faq .locate-media {
    margin-top: 6px;
  }

  .page-faq .qa-item {
    padding-left: 20px;
    padding-right: 14px;
  }

  .page-faq .qa-q {
    font-size: 18px;
  }
}

@media (min-width: 980px) {
  .page-faq {
    padding-block: 30px 104px;
  }

  .page-faq .faq-columns {
    grid-template-columns: minmax(0, 1fr) var(--faq-side-w);
    gap: 48px;
    align-items: start;
  }

  .page-faq .faq-side {
    position: sticky;
    top: var(--faq-sticky-top);
  }

  .page-faq h1 {
    max-width: 21ch;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-head {
    padding-bottom: 46px;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-faq .locate-cell,
  .page-faq .qa-arrow,
  .page-faq .qa-item,
  .page-faq .side-links a {
    transition: none;
  }
}