.page-faq {
  --faq-rail: 232px;
  --faq-measure: 720px;
  --faq-hair: rgba(154, 166, 196, 0.20);
  --faq-hair-cyan: rgba(53, 224, 208, 0.42);
  --faq-hair-galaxy: rgba(123, 77, 255, 0.42);
  padding-bottom: 88px;
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 18px 0 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: var(--fs-8);
  letter-spacing: 0.04em;
  color: var(--muted);
}

.page-faq .breadcrumb a {
  color: var(--muted);
  text-decoration: none;
  transition: color 0.2s var(--ease);
}

.page-faq .breadcrumb a:hover {
  color: var(--cyan);
}

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

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

/* ---------- 首屏 ---------- */
.page-faq .guide-hero {
  position: relative;
  margin-top: 10px;
  padding: 46px 0 38px;
  border-bottom: 1px solid var(--faq-hair);
  background:
    radial-gradient(120% 150% at 6% 0%, rgba(123, 77, 255, 0.24), transparent 58%),
    radial-gradient(90% 130% at 94% 6%, rgba(53, 224, 208, 0.14), transparent 62%);
}

.page-faq .guide-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(rgba(154, 166, 196, 0.06) 1px, transparent 1px);
  background-size: 100% 52px;
  opacity: 0.8;
}

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

.page-faq h1 {
  margin: 16px 0 0;
  max-width: 22ch;
  font-size: var(--fs-1);
  line-height: 1.12;
  letter-spacing: -0.015em;
  color: var(--ink);
}

.page-faq .guide-hero-lead {
  max-width: 64ch;
  margin: 22px 0 0;
  font-size: var(--fs-6);
  line-height: 1.8;
  color: var(--ink);
}

.page-faq .guide-stats {
  display: flex;
  flex-wrap: wrap;
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--faq-hair);
}

.page-faq .guide-stats li {
  flex: 1 1 168px;
  min-width: 0;
  padding: 16px 20px 14px 0;
  border-right: 1px solid var(--faq-hair);
}

.page-faq .guide-stats li:first-child {
  padding-left: 0;
}

.page-faq .guide-stats li:last-child {
  border-right: 0;
}

.page-faq .guide-stats .mono {
  display: block;
  font-size: var(--fs-5);
  line-height: 1.1;
  letter-spacing: 0.02em;
  color: var(--gold);
}

.page-faq .guide-stats em {
  display: block;
  margin-top: 6px;
  font-style: normal;
  font-size: var(--fs-8);
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 主栅格 ---------- */
.page-faq .guide-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 36px;
  padding-top: 46px;
}

.page-faq .guide-main {
  min-width: 0;
}

/* ---------- 目录轨道 ---------- */
.page-faq .guide-rail {
  align-self: start;
}

.page-faq .guide-rail .chapter-rail-title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: var(--fs-8);
  letter-spacing: 0.16em;
  color: var(--muted);
}

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

.page-faq .rail-list li {
  border-bottom: 1px solid var(--faq-hair);
}

.page-faq .rail-link {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 13px 0 13px 10px;
  border-left: 2px solid transparent;
  color: var(--muted);
  font-size: var(--fs-7);
  text-decoration: none;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-faq .rail-link .mono {
  font-size: var(--fs-8);
  letter-spacing: 0.08em;
  color: var(--line-mid);
  transition: color 0.2s var(--ease);
}

.page-faq .rail-link:hover {
  color: var(--ink);
  border-left-color: var(--galaxy);
  background: rgba(123, 77, 255, 0.10);
}

.page-faq .rail-link:hover .mono {
  color: var(--cyan);
}

.page-faq .rail-link[aria-current="true"] {
  color: var(--ink);
  border-left-color: var(--gold);
  background: rgba(242, 192, 99, 0.08);
}

.page-faq .rail-link[aria-current="true"] .mono {
  color: var(--gold);
}

/* ---------- 章节 ---------- */
.page-faq .guide-section {
  padding: 0 0 66px;
}

.page-faq .guide-section + .guide-section {
  padding-top: 60px;
  border-top: 1px solid var(--faq-hair);
}

.page-faq .guide-section .section-title {
  margin: 12px 0 0;
  font-size: var(--fs-3);
  line-height: 1.25;
  color: var(--ink);
}

.page-faq .guide-section .section-note {
  max-width: 62ch;
  margin: 16px 0 0;
  font-size: var(--fs-6);
  line-height: 1.8;
  color: var(--ink);
}

.page-faq .media-frame {
  margin: 28px 0 0;
  border: 1px solid var(--faq-hair);
  background: var(--nebula);
}

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

.page-faq .media-caption {
  padding: 12px 16px;
  border-top: 1px solid var(--faq-hair);
  font-family: var(--font-mono);
  font-size: var(--fs-8);
  line-height: 1.6;
  letter-spacing: 0.03em;
  color: var(--muted);
}

/* ---------- 步骤清单 ---------- */
.page-faq .step-list {
  margin-top: 30px;
  border-top: 1px solid var(--faq-hair);
}

.page-faq .guide-step {
  border-bottom: 1px solid var(--faq-hair);
  border-left: 2px solid transparent;
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-faq .guide-step[open] {
  border-left-color: var(--cyan);
  background: linear-gradient(90deg, rgba(53, 224, 208, 0.06), transparent 62%);
}

.page-faq .guide-step > summary {
  display: flex;
  align-items: baseline;
  gap: 18px;
  padding: 20px 6px 20px 14px;
  cursor: pointer;
  list-style: none;
}

.page-faq .guide-step > summary::-webkit-details-marker {
  display: none;
}

.page-faq .guide-step > summary::after {
  content: "＋";
  margin-left: auto;
  padding-left: 12px;
  font-family: var(--font-mono);
  font-size: var(--fs-7);
  color: var(--galaxy);
}

.page-faq .guide-step[open] > summary::after {
  content: "－";
  color: var(--cyan);
}

.page-faq .step-no {
  flex: none;
  font-size: clamp(26px, 4.4vw, 40px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cyan);
}

.page-faq .step-name {
  font-size: var(--fs-5);
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink);
}

.page-faq .step-body {
  padding: 0 6px 22px 14px;
}

.page-faq .step-body p {
  max-width: 60ch;
  margin: 0;
  font-size: var(--fs-7);
  line-height: 1.85;
  color: var(--ink);
}

.page-faq .step-body p + p {
  margin-top: 10px;
}

.page-faq .step-tip {
  padding-left: 14px;
  border-left: 1px solid var(--faq-hair-cyan);
  color: var(--muted) !important;
}

.page-faq .step-foot {
  margin-top: 22px;
}

/* ---------- 收藏卡片 ---------- */
.page-faq .fav-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: 28px;
}

.page-faq .fav-card {
  position: relative;
  padding: 24px 22px 26px;
  background: var(--nebula);
  border: 1px solid var(--faq-hair);
  transition: border-color 0.22s var(--ease), background 0.22s var(--ease), transform 0.22s var(--ease);
}

.page-faq .fav-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 34px;
  height: 2px;
  background: var(--galaxy);
  transition: background 0.22s var(--ease), width 0.22s var(--ease);
}

.page-faq .fav-card:hover {
  border-color: var(--faq-hair-cyan);
  background: #121A3A;
  transform: translateY(-2px);
}

.page-faq .fav-card:hover::before {
  width: 72px;
  background: var(--cyan);
}

.page-faq .fav-card .card-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--fs-8);
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-faq .fav-card h3 {
  margin: 12px 0 0;
  font-size: var(--fs-5);
  line-height: 1.35;
  color: var(--ink);
}

.page-faq .fav-card p {
  margin: 12px 0 0;
  font-size: var(--fs-7);
  line-height: 1.8;
  color: var(--ink);
}

.page-faq .fav-note {
  margin: 24px 0 0;
  padding: 16px 18px;
  border-left: 2px solid var(--gold);
  background: rgba(242, 192, 99, 0.07);
  font-size: var(--fs-7);
  line-height: 1.8;
  color: var(--ink);
}

/* ---------- 编号定位 ---------- */
.page-faq .coord-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  margin-top: 26px;
}

.page-faq .coord-text p {
  margin: 0;
  max-width: 60ch;
  font-size: var(--fs-7);
  line-height: 1.85;
  color: var(--ink);
}

.page-faq .coord-text p + p {
  margin-top: 14px;
}

.page-faq .coord-chips-wrap {
  margin-top: 24px;
  padding: 20px 18px 22px;
  border: 1px solid var(--faq-hair);
  background-color: var(--nebula);
  background-image:
    linear-gradient(rgba(154, 166, 196, 0.10) 1px, transparent 1px),
    linear-gradient(90deg, rgba(154, 166, 196, 0.10) 1px, transparent 1px);
  background-size: 28px 28px;
}

.page-faq .coord-chips-title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: var(--fs-8);
  letter-spacing: 0.14em;
  color: var(--muted);
}

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

.page-faq .coord-chip {
  font-family: var(--font-mono);
  font-size: var(--fs-8);
  letter-spacing: 0.06em;
  padding: 8px 12px;
  color: var(--cyan);
  background: rgba(53, 224, 208, 0.08);
  border: 1px solid var(--faq-hair-cyan);
  cursor: pointer;
  transition: color 0.2s var(--ease), background 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-faq .coord-chip:hover {
  color: var(--void);
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-faq .coord-chip[data-copied] {
  color: var(--void);
  background: var(--gold);
  border-color: var(--gold);
}

.page-faq .coord-split .media-frame {
  margin: 0;
}

/* ---------- 排查四象限 ---------- */
.page-faq .quad-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  background: var(--faq-hair);
  border: 1px solid var(--faq-hair);
}

.page-faq .quad {
  padding: 24px 22px 26px;
  background: var(--nebula);
}

.page-faq .quad--indigo {
  background: linear-gradient(155deg, rgba(75, 46, 158, 0.55), var(--nebula) 72%);
}

.page-faq .quad--teal {
  background: linear-gradient(155deg, rgba(11, 59, 60, 0.80), var(--nebula) 72%);
}

.page-faq .quad--wine {
  background: linear-gradient(155deg, rgba(140, 43, 74, 0.42), var(--nebula) 72%);
}

.page-faq .quad-no {
  display: inline-block;
  font-size: var(--fs-8);
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-faq .quad h3 {
  margin: 12px 0 0;
  font-size: var(--fs-5);
  line-height: 1.35;
  color: var(--ink);
}

.page-faq .quad p {
  margin: 12px 0 0;
  font-size: var(--fs-7);
  line-height: 1.8;
  color: var(--ink);
}

.page-faq .quad-note {
  margin: 22px 0 0;
  font-size: var(--fs-7);
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 帮助分类 ---------- */
.page-faq .cat-list {
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--faq-hair);
}

.page-faq .cat-row {
  position: relative;
  padding: 22px 0 22px 46px;
  border-bottom: 1px solid var(--faq-hair);
  transition: background 0.2s var(--ease);
}

.page-faq .cat-row:hover {
  background: rgba(123, 77, 255, 0.08);
}

.page-faq .cat-letter {
  position: absolute;
  left: 0;
  top: 24px;
  font-size: var(--fs-6);
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-faq .cat-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 16px;
}

.page-faq .cat-name {
  margin: 0;
  font-size: var(--fs-5);
  line-height: 1.35;
  color: var(--ink);
}

.page-faq .cat-count {
  font-size: var(--fs-8);
  letter-spacing: 0.1em;
  color: var(--gold);
}

.page-faq .cat-desc {
  max-width: 62ch;
  margin: 10px 0 0;
  font-size: var(--fs-7);
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .cat-note {
  margin: 22px 0 0;
  padding: 16px 18px;
  border: 1px solid var(--faq-hair);
  border-left: 2px solid var(--galaxy);
  font-size: var(--fs-7);
  line-height: 1.8;
  color: var(--ink);
}

/* ---------- 结尾引导 ---------- */
.page-faq .guide-cta {
  margin-top: 10px;
  padding: 34px 26px;
  border: 1px solid var(--faq-hair-galaxy);
  background: linear-gradient(120deg, rgba(75, 46, 158, 0.50), rgba(7, 11, 27, 0.15) 66%);
}

.page-faq .guide-cta h2 {
  margin: 0;
  font-size: var(--fs-4);
  line-height: 1.3;
  color: var(--ink);
}

.page-faq .guide-cta p {
  max-width: 58ch;
  margin: 14px 0 0;
  font-size: var(--fs-7);
  line-height: 1.8;
  color: var(--ink);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .fav-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-faq .coord-split {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
    gap: 32px;
  }

  .page-faq .guide-hero {
    padding: 58px 0 44px;
  }

  .page-faq .guide-cta {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 32px;
    padding: 38px 34px;
  }

  .page-faq .guide-cta-actions {
    margin-top: 0;
    flex: none;
  }
}

@media (min-width: 1024px) {
  .page-faq .guide-layout {
    grid-template-columns: minmax(0, 1fr) var(--faq-rail);
    gap: 56px;
    padding-top: 56px;
  }

  .page-faq .guide-main {
    grid-column: 1;
    grid-row: 1;
    max-width: var(--faq-measure);
  }

  .page-faq .guide-rail {
    grid-column: 2;
    grid-row: 1;
    position: sticky;
    top: 104px;
    padding-left: 22px;
    border-left: 1px solid var(--faq-hair);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .fav-card,
  .page-faq .rail-link,
  .page-faq .coord-chip,
  .page-faq .guide-step {
    transition: none;
  }

  .page-faq .fav-card:hover {
    transform: none;
  }
}