.page-faq {
  --faq-index-w: 236px;
  --faq-note-w: 88px;
  --faq-glow: rgba(56, 242, 232, 0.16);
  background: var(--ink);
  color: var(--mist);
  padding: clamp(18px, 3vw, 34px) 0 clamp(56px, 8vw, 100px);
  overflow-x: clip;
}

.page-faq .breadcrumbs {
  margin-bottom: clamp(18px, 2.6vw, 28px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 4vw, 56px) clamp(20px, 3.4vw, 48px);
  border: 1px solid var(--hair-strong);
  background:
    linear-gradient(135deg, var(--archive) 0%, #120a22 44%, var(--graphite) 100%);
  box-shadow: var(--hard-shadow);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(0deg, rgba(232, 237, 242, 0.05) 0 1px, transparent 1px 34px),
    repeating-linear-gradient(90deg, rgba(232, 237, 242, 0.04) 0 1px, transparent 1px 34px);
  opacity: 0.55;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -14%;
  bottom: -58%;
  width: min(520px, 78%);
  aspect-ratio: 1;
  background: radial-gradient(circle at 34% 32%, var(--faq-glow), transparent 64%);
  clip-path: polygon(18% 0, 100% 12%, 82% 100%, 0 86%);
  pointer-events: none;
}

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

.page-faq .faq-hero .eyebrow {
  margin: 0 0 14px;
  color: var(--cyan);
  letter-spacing: 0.12em;
}

.page-faq .faq-hero h1 {
  margin: 0;
  max-width: 20ch;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2rem, 5.6vw, 3.6rem);
  line-height: 1.08;
  letter-spacing: 0.01em;
  color: var(--mist);
}

.page-faq .faq-hero .lede {
  margin: clamp(14px, 2vw, 22px) 0 0;
  max-width: 62ch;
  font-size: clamp(0.94rem, 1.15vw, 1.05rem);
  line-height: 1.85;
  color: var(--mist-70);
}

.page-faq .faq-hero-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 20px;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 20px 0 0;
  list-style: none;
  border-top: 1px solid var(--hair);
}

.page-faq .faq-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-faq .faq-stat-num {
  font-size: clamp(1.3rem, 2.4vw, 1.75rem);
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: 0.02em;
  line-height: 1;
}

.page-faq .faq-stat-label {
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--mist-55);
  letter-spacing: 0.02em;
}

/* ---------- 主网格 ---------- */
.page-faq .faq-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3vw, 36px);
  margin-top: clamp(24px, 3.4vw, 44px);
}

/* ---------- 左侧分类索引 ---------- */
.page-faq .faq-index {
  border: 1px solid var(--hair);
  background: linear-gradient(180deg, var(--graphite), #0c1119);
  padding: 16px;
}

.page-faq .faq-index-title {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--lavender);
}

.page-faq .faq-index-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.page-faq .faq-index-link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 10px;
  border: 1px solid var(--hair);
  background: rgba(91, 113, 134, 0.07);
  color: var(--mist);
  text-decoration: none;
  font-size: 13px;
  line-height: 1.3;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-faq .faq-index-link:hover,
.page-faq .faq-index-link:focus-visible {
  border-color: var(--cyan);
  background: rgba(56, 242, 232, 0.08);
  transform: translate(-2px, -2px);
  outline: none;
}

.page-faq .faq-icon {
  flex: 0 0 auto;
  color: var(--panel-blue);
}

.page-faq .faq-index-link:hover .faq-icon,
.page-faq .faq-index-link:focus-visible .faq-icon {
  color: var(--cyan);
}

.page-faq .faq-index-num {
  font-size: 11px;
  color: var(--gold);
  letter-spacing: 0.06em;
}

.page-faq .faq-index-label {
  flex: 1 1 auto;
  min-width: 0;
  word-break: break-word;
}

.page-faq .faq-index-media {
  margin: 18px 0 0;
  border: 1px solid var(--hair);
}

.page-faq .faq-index-actions {
  margin-top: 14px;
  flex-wrap: wrap;
}

/* ---------- 问答通用 ---------- */
.page-faq .faq-main {
  min-width: 0;
}

.page-faq .faq-cat {
  padding: 0 0 clamp(28px, 4vw, 46px);
  scroll-margin-top: calc(var(--sticky-top) + 16px);
}

.page-faq .faq-cat + .faq-cat {
  border-top: 1px solid var(--hair);
  padding-top: clamp(28px, 4vw, 46px);
}

.page-faq .faq-cat .section-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  column-gap: 14px;
  row-gap: 6px;
  margin-bottom: 18px;
}

.page-faq .faq-cat .section-num {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 4.6vw, 3.2rem);
  font-weight: 700;
  line-height: 0.9;
  color: transparent;
  -webkit-text-stroke: 1px var(--panel-blue);
  letter-spacing: 0.02em;
}

.page-faq .faq-cat .section-label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--lavender);
}

.page-faq .faq-cat .section-title {
  grid-column: 1 / -1;
  margin: 4px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.35rem, 2.6vw, 2rem);
  line-height: 1.2;
  letter-spacing: 0.015em;
  color: var(--mist);
}

.page-faq .faq-cat .section-rule {
  grid-column: 1 / -1;
  display: block;
  height: 1px;
  margin-top: 10px;
  background: linear-gradient(90deg, var(--hair-strong), transparent 78%);
}

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

.page-faq .qa {
  border: 1px solid var(--hair);
  background: var(--graphite);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-faq .qa:hover {
  border-color: var(--hair-strong);
}

.page-faq .qa[open] {
  border-color: var(--cyan);
  box-shadow: 5px 5px 0 var(--faq-glow);
}

.page-faq .qa-q {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  font-size: clamp(0.94rem, 1.15vw, 1.02rem);
  line-height: 1.6;
  font-weight: 600;
  color: var(--mist);
}

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

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

.page-faq .qa-q-text {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .qa-q-mark {
  position: relative;
  flex: 0 0 auto;
  width: 14px;
  height: 14px;
  margin-top: 5px;
}

.page-faq .qa-q-mark::before,
.page-faq .qa-q-mark::after {
  content: "";
  position: absolute;
  background: var(--lavender);
  transition: transform var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-faq .qa-q-mark::before {
  left: 0;
  right: 0;
  top: 6px;
  height: 2px;
}

.page-faq .qa-q-mark::after {
  top: 0;
  bottom: 0;
  left: 6px;
  width: 2px;
}

.page-faq .qa[open] .qa-q-mark::before,
.page-faq .qa[open] .qa-q-mark::after {
  background: var(--cyan);
}

.page-faq .qa[open] .qa-q-mark::after {
  transform: scaleY(0);
}

.page-faq .qa-a {
  padding: 0 16px 18px;
  border-top: 1px solid var(--hair);
  margin-top: 2px;
  padding-top: 14px;
  color: var(--mist-70);
  font-size: 0.94rem;
  line-height: 1.85;
}

.page-faq .qa-a p {
  margin: 0 0 10px;
}

.page-faq .qa-a p:last-child {
  margin-bottom: 0;
}

.page-faq .qa-steps {
  margin: 0 0 10px;
  padding-left: 20px;
  display: grid;
  gap: 6px;
}

.page-faq .qa-steps li {
  line-height: 1.75;
}

.page-faq .qa-inline-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(56, 242, 232, 0.4);
  transition: border-color var(--dur) var(--ease);
}

.page-faq .qa-inline-link:hover,
.page-faq .qa-inline-link:focus-visible {
  border-bottom-color: var(--cyan);
}

.page-faq .qa-mono {
  color: var(--cyan);
  font-size: 0.9em;
  word-break: break-all;
}

/* ---------- 中段图 ---------- */
.page-faq .faq-mid-media {
  margin: clamp(24px, 3.4vw, 40px) 0;
  border: 1px solid var(--hair-strong);
}

/* ---------- 提示条 ---------- */
.page-faq .faq-tipbar {
  display: grid;
  gap: 12px;
  margin: clamp(24px, 3.4vw, 40px) 0;
  padding: 18px 18px 20px;
  border: 1px solid var(--gold);
  background:
    linear-gradient(120deg, rgba(201, 162, 39, 0.1), transparent 62%),
    var(--archive);
  box-shadow: var(--hard-shadow);
}

.page-faq .faq-tipbar-tag {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--gold);
}

.page-faq .faq-tipbar-text {
  margin: 0;
  color: var(--mist-70);
  font-size: 0.94rem;
  line-height: 1.8;
  max-width: 56ch;
}

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

/* ---------- 下一步 ---------- */
.page-faq .faq-next {
  margin-top: clamp(24px, 3.4vw, 40px);
  padding-top: clamp(24px, 3.4vw, 40px);
  border-top: 1px solid var(--hair-strong);
}

.page-faq .faq-next-title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.25rem, 2.2vw, 1.7rem);
  letter-spacing: 0.015em;
  color: var(--mist);
}

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

.page-faq .faq-next-card {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-areas:
    "num name"
    "num desc";
  column-gap: 14px;
  row-gap: 4px;
  padding: 16px;
  border: 1px solid var(--hair);
  background: var(--graphite);
  text-decoration: none;
  color: var(--mist);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-faq .faq-next-card:hover,
.page-faq .faq-next-card:focus-visible {
  border-color: var(--cyan);
  transform: translate(-2px, -2px);
  box-shadow: 5px 5px 0 var(--faq-glow);
  outline: none;
}

.page-faq .faq-next-num {
  grid-area: num;
  align-self: start;
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border: 1px solid var(--hair-strong);
  color: var(--cyan);
  font-size: 12px;
}

.page-faq .faq-next-name {
  grid-area: name;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.03em;
}

.page-faq .faq-next-desc {
  grid-area: desc;
  font-size: 0.88rem;
  line-height: 1.65;
  color: var(--mist-55);
}

/* ---------- 右侧窄注释 ---------- */
.page-faq .faq-note {
  display: none;
}

.page-faq .faq-note-tag {
  margin: 0 0 8px;
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--lavender);
}

.page-faq .faq-note-text {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.9;
  color: var(--mist-55);
}

.page-faq .faq-note-link {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.page-faq .faq-note-link a {
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(201, 162, 39, 0.45);
}

.page-faq .faq-note-link a:hover,
.page-faq .faq-note-link a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

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

/* ---------- 中屏 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-index-list {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-faq .faq-index-link {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
    padding: 12px 10px;
    min-height: 100%;
  }

  .page-faq .faq-index-label {
    font-size: 12.5px;
  }

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

  .page-faq .faq-next-card {
    grid-template-columns: minmax(0, 1fr);
    grid-template-areas:
      "num"
      "name"
      "desc";
    row-gap: 8px;
  }
}

/* ---------- 大屏：固定索引 + 主栏 + 窄注释 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-grid {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--sticky-top) + 16px);
  }

  .page-faq .faq-index-list {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
  }

  .page-faq .faq-index-link {
    flex-direction: row;
    align-items: center;
    gap: 8px;
    padding: 9px 10px;
  }

  .page-faq .faq-cat .section-head {
    grid-template-columns: auto minmax(0, 1fr);
    column-gap: 18px;
  }

  .page-faq .faq-cat .section-title {
    grid-column: 2;
    margin-top: 0;
  }

  .page-faq .faq-cat .section-rule {
    grid-column: 1 / -1;
  }

  .page-faq .faq-tipbar {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    column-gap: 22px;
  }

  .page-faq .faq-tipbar-tag {
    grid-column: 1 / -1;
  }

  .page-faq .faq-tipbar .btn {
    justify-self: end;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-grid {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr) var(--faq-note-w);
    column-gap: clamp(22px, 2.6vw, 34px);
  }

  .page-faq .faq-note {
    display: block;
    position: sticky;
    top: calc(var(--sticky-top) + 16px);
    padding-left: 12px;
    border-left: 1px solid var(--hair);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index-link,
  .page-faq .qa,
  .page-faq .qa-q-mark::before,
  .page-faq .qa-q-mark::after,
  .page-faq .faq-next-card {
    transition: none;
  }

  .page-faq .faq-index-link:hover,
  .page-faq .faq-index-link:focus-visible,
  .page-faq .faq-next-card:hover,
  .page-faq .faq-next-card:focus-visible {
    transform: none;
  }
}