.page-faq {
  --faq-gutter: clamp(1.25rem, 3vw, 2.5rem);
  --faq-line: rgba(201, 162, 39, .28);
  --faq-line-soft: rgba(154, 168, 163, .22);
  --faq-panel: rgba(6, 26, 23, .55);
}

/* ---------- 面包屑 ---------- */
.page-faq .faq-crumb {
  padding-top: 1.5rem;
  padding-bottom: .5rem;
}

.page-faq .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .06em;
  color: var(--muted);
}

.page-faq .breadcrumb a {
  color: var(--gold-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .18s var(--ease), color .18s var(--ease);
}

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

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(1.25rem, 3vw, 2rem) 0 clamp(2.5rem, 6vw, 4.5rem);
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(2rem, 5vw, 3.5rem);
  align-items: center;
}

.page-faq .faq-hero__text {
  max-width: 40rem;
}

.page-faq .faq-hero__text h1 {
  margin: .85rem 0 0;
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(2.1rem, 6.2vw, 4.2rem);
  line-height: 1.1;
  letter-spacing: -.015em;
  color: var(--paper);
}

.page-faq .faq-hero__lead {
  margin: 1.35rem 0 0;
  max-width: 62ch;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-hero__jump {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin: 1.75rem 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero__jump a {
  display: inline-block;
  padding: .42rem .85rem;
  border: 1px solid var(--faq-line);
  font-size: .8rem;
  letter-spacing: .04em;
  color: var(--gold-soft);
  text-decoration: none;
  background: rgba(6, 26, 23, .5);
  transition: border-color .18s var(--ease), color .18s var(--ease), transform .18s var(--ease);
}

.page-faq .faq-hero__jump a:hover,
.page-faq .faq-hero__jump a:focus-visible {
  border-color: var(--gold);
  color: var(--gold);
  transform: translateY(-2px);
}

.page-faq .faq-hero__visual {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: .5rem;
  padding: .5rem;
}

.page-faq .faq-hero__cell {
  display: grid;
  place-items: center;
  aspect-ratio: 1 / 1;
  border: 1px solid var(--faq-line);
  background: linear-gradient(155deg, rgba(6, 26, 23, .85), rgba(11, 43, 38, .5));
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .1em;
  color: var(--gold-soft);
  box-shadow: 0 6px 18px rgba(0, 0, 0, .35);
}

.page-faq .faq-hero__cell:nth-child(3n) {
  color: var(--cyan);
  border-color: rgba(57, 217, 199, .38);
}

.page-faq .faq-hero__cell:nth-child(5n) {
  background: linear-gradient(155deg, rgba(201, 162, 39, .14), rgba(6, 26, 23, .8));
}

/* ---------- 通用小节 ---------- */
.page-faq .faq-sub {
  margin: 1rem 0 0;
  max-width: 64ch;
  font-size: .95rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .section--paper .faq-sub {
  color: #4a5652;
}

/* ---------- 指南总目录 ---------- */
.page-faq .faq-catalog {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.75rem, 4vw, 3rem);
  margin-top: clamp(1.75rem, 4vw, 2.75rem);
}

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

.page-faq .faq-chapter {
  display: grid;
  grid-template-columns: 2.6rem minmax(0, 1fr) auto;
  align-items: baseline;
  gap: .85rem;
  padding: .8rem .25rem;
  border-bottom: 1px solid var(--faq-line-soft);
  transition: background-color .18s var(--ease), padding-left .18s var(--ease);
}

.page-faq .faq-chapter:hover {
  background: rgba(201, 162, 39, .06);
  padding-left: .6rem;
}

.page-faq .faq-chapter__idx {
  font-family: var(--font-mono);
  font-size: .8rem;
  letter-spacing: .08em;
  color: var(--gold);
}

.page-faq .faq-chapter__name {
  font-size: .95rem;
  line-height: 1.5;
  color: var(--paper);
}

.page-faq .faq-chapter__count {
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .04em;
  color: var(--muted);
  white-space: nowrap;
}

.page-faq .faq-catalog__fig {
  margin: 0;
  border: 1px solid var(--faq-line);
  box-shadow: var(--shadow-lg);
}

/* ---------- 筛选条 ---------- */
.page-faq .faq-filter {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin-top: clamp(1.5rem, 3.5vw, 2.25rem);
  padding: .75rem 0;
  border-top: 1px solid var(--faq-line);
  border-bottom: 1px solid var(--faq-line);
}

/* ---------- 左目录 + 右问答 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.75rem, 4vw, 3rem);
  margin-top: clamp(1.5rem, 3.5vw, 2.5rem);
}

.page-faq .faq-rail {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.page-faq .faq-toc {
  display: flex;
  flex-direction: column;
  gap: .1rem;
  padding-left: .85rem;
  border-left: 2px solid var(--faq-line-soft);
}

.page-faq .faq-toc__title {
  margin: 0 0 .6rem;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .16em;
  color: var(--muted);
}

.page-faq .faq-toc a {
  display: block;
  padding: .45rem 0 .45rem .1rem;
  font-size: .88rem;
  color: var(--muted);
  text-decoration: none;
  transition: color .18s var(--ease), padding-left .18s var(--ease);
}

.page-faq .faq-toc a:hover,
.page-faq .faq-toc a:focus-visible {
  color: var(--gold-soft);
  padding-left: .35rem;
}

.page-faq .faq-toc a.is-active {
  color: var(--gold);
  padding-left: .35rem;
  font-weight: 600;
}

.page-faq .faq-rail__note {
  padding: .9rem 1rem;
  border: 1px solid var(--faq-line-soft);
  background: var(--faq-panel);
}

.page-faq .faq-rail__notetitle {
  margin: 0 0 .5rem;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .14em;
  color: var(--gold);
}

.page-faq .faq-rail__note p:last-child {
  margin: 0;
  font-size: .82rem;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 问答 ---------- */
.page-faq .faq-qa {
  display: flex;
  flex-direction: column;
  gap: clamp(1.5rem, 3.5vw, 2.25rem);
  min-width: 0;
}

.page-faq .faq-group__title {
  display: flex;
  align-items: baseline;
  gap: .7rem;
  margin: 0 0 .9rem;
  padding-bottom: .6rem;
  border-bottom: 1px solid var(--faq-line);
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(1.15rem, 2.4vw, 1.5rem);
  color: var(--paper);
}

.page-faq .faq-group__idx {
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .1em;
  color: var(--gold);
}

.page-faq .faq-qa__item {
  margin-bottom: .55rem;
  border: 1px solid var(--faq-line-soft);
  border-left: 3px solid transparent;
  background: var(--faq-panel);
  transition: border-color .18s var(--ease), box-shadow .18s var(--ease);
}

.page-faq .faq-qa__item[open] {
  border-left-color: var(--gold);
  box-shadow: var(--shadow-lg);
}

.page-faq .faq-qa__q {
  display: flex;
  align-items: baseline;
  gap: .7rem;
  padding: 1rem 1.15rem;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--paper);
}

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

.page-faq .faq-qa__q::before {
  content: "+";
  flex: none;
  font-family: var(--font-mono);
  font-size: .95rem;
  color: var(--gold);
}

.page-faq .faq-qa__item[open] .faq-qa__q::before {
  content: "−";
}

.page-faq .faq-qa__q:hover {
  color: var(--gold-soft);
}

.page-faq .faq-qa__a {
  padding: 0 1.15rem 1.15rem 2.65rem;
  font-size: .93rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-qa__a p {
  margin: 0 0 .75rem;
}

.page-faq .faq-qa__a strong {
  color: var(--gold-soft);
  font-weight: 600;
}

.page-faq .faq-mini {
  margin: 0 0 .75rem;
  padding-left: 1.1rem;
  display: flex;
  flex-direction: column;
  gap: .35rem;
}

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

.page-faq .faq-qa__a .faq-tip {
  margin: 0;
  padding: .55rem .8rem;
  border-left: 2px solid var(--amber);
  background: rgba(232, 134, 58, .09);
  font-size: .86rem;
  color: #d9c8b4;
}

/* ---------- 步骤演示 ---------- */
.page-faq .faq-steps__fig {
  margin: 0 0 clamp(1.75rem, 4vw, 2.75rem);
  border: 1px solid var(--faq-line);
  box-shadow: var(--shadow-lg);
}

.page-faq .faq-steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 3.5vw, 2.25rem);
}

.page-faq .faq-step {
  padding: clamp(1.25rem, 3vw, 1.85rem);
  border: 2px solid var(--faq-line);
  background: linear-gradient(168deg, rgba(6, 26, 23, .8), rgba(11, 43, 38, .55));
  box-shadow: var(--shadow-lg);
  transition: transform .18s var(--ease), box-shadow .18s var(--ease);
}

.page-faq .faq-step:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.page-faq .faq-step__head {
  padding-bottom: .9rem;
  border-bottom: 1px solid var(--faq-line-soft);
}

.page-faq .faq-step__num {
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .16em;
  color: var(--cyan);
}

.page-faq .faq-step__title {
  margin: .5rem 0 .35rem;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.3rem;
  color: var(--paper);
}

.page-faq .faq-step__meta {
  margin: 0;
  font-size: .82rem;
  color: var(--muted);
}

.page-faq .faq-step__list {
  margin: 1.15rem 0 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: .9rem;
}

.page-faq .faq-step__list li {
  display: grid;
  grid-template-columns: 1.9rem minmax(0, 1fr);
  gap: .85rem;
  align-items: start;
}

.page-faq .faq-step__idx {
  display: grid;
  place-items: center;
  width: 1.9rem;
  height: 1.9rem;
  border: 1px solid var(--faq-line);
  background: rgba(201, 162, 39, .1);
  font-family: var(--font-mono);
  font-size: .82rem;
  color: var(--gold);
}

.page-faq .faq-step__list strong {
  display: block;
  font-size: .95rem;
  font-weight: 600;
  color: var(--paper);
}

.page-faq .faq-step__list p {
  margin: .25rem 0 0;
  font-size: .88rem;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-step__trap {
  margin: 1.15rem 0 0;
  padding: .6rem .85rem;
  border-left: 2px solid var(--amber);
  background: rgba(232, 134, 58, .09);
  font-size: .84rem;
  line-height: 1.7;
  color: #d9c8b4;
}

/* ---------- 术语对照 ---------- */
.page-faq .faq-term-wrap {
  margin-top: clamp(1.5rem, 3.5vw, 2.25rem);
  border: 2px solid rgba(20, 26, 24, .22);
  box-shadow: 0 12px 28px rgba(0, 0, 0, .22);
}

.page-faq .faq-term-cap {
  caption-side: top;
  padding: 0 0 .85rem;
  text-align: left;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .12em;
  color: #5c6a64;
}

.page-faq .faq-term-table {
  width: 100%;
  border-collapse: collapse;
}

.page-faq .faq-term-table th,
.page-faq .faq-term-table td {
  padding: .78rem 1rem;
  text-align: left;
  font-size: .92rem;
  line-height: 1.6;
}

.page-faq .faq-term-table thead th {
  background: #0B2B26;
  color: var(--gold-soft);
  font-family: var(--font-mono);
  font-size: .76rem;
  font-weight: 500;
  letter-spacing: .12em;
}

.page-faq .faq-term-table tbody tr:nth-child(odd) td {
  background: rgba(244, 240, 230, .72);
}

.page-faq .faq-term-table tbody tr:nth-child(even) td {
  background: #F4F0E6;
}

.page-faq .faq-term-key {
  font-family: var(--font-mono);
  font-weight: 600;
  color: #0B2B26;
  white-space: nowrap;
}

.page-faq .faq-term-table tbody td:last-child {
  color: #3c463f;
}

.page-faq .faq-term-note {
  margin: 1.1rem 0 0;
  font-size: .86rem;
  line-height: 1.75;
  color: #4a5652;
}

/* ---------- 求助路径 ---------- */
.page-faq .faq-help {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.75rem, 4vw, 3rem);
  align-items: start;
}

.page-faq .faq-help__body p {
  max-width: 62ch;
  font-size: .95rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-help__contact {
  margin: 1.6rem 0 1.2rem;
}

.page-faq .faq-help__note {
  margin: 0 0 .75rem;
  font-size: .86rem;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-help__side {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.page-faq .faq-help__card {
  padding: 1.1rem 1.2rem;
  border: 1px solid var(--faq-line);
  background: var(--faq-panel);
}

.page-faq .faq-help__cardtitle {
  margin: 0 0 .7rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .14em;
  color: var(--gold);
}

.page-faq .faq-help__code {
  margin: 0 0 .8rem;
  padding: .55rem .7rem;
  border: 1px dashed rgba(201, 162, 39, .4);
  font-size: .88rem;
  color: var(--gold-soft);
  background: rgba(201, 162, 39, .07);
}

.page-faq .faq-help__list {
  margin: 0;
  padding-left: 1.05rem;
  font-size: .86rem;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-help__list li + li {
  margin-top: .3rem;
}

/* ---------- 相关内容 ---------- */
.page-faq .faq-related {
  margin-top: clamp(2rem, 5vw, 3.25rem);
  padding-top: 1.5rem;
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-related__title {
  margin: 0 0 .9rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .16em;
  color: var(--muted);
}

.page-faq .faq-related__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: .55rem;
}

.page-faq .faq-related__list a {
  display: block;
  padding: .75rem .95rem;
  border: 1px solid var(--faq-line-soft);
  font-size: .9rem;
  color: var(--gold-soft);
  text-decoration: none;
  transition: border-color .18s var(--ease), transform .18s var(--ease), color .18s var(--ease);
}

.page-faq .faq-related__list a:hover,
.page-faq .faq-related__list a:focus-visible {
  border-color: var(--gold);
  color: var(--gold);
  transform: translateY(-3px);
}

/* ---------- 媒体 ---------- */
.page-faq .media-frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  background: #061A17;
}

.page-faq .media-frame__caption {
  font-size: .8rem;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-hero__visual {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

@media (min-width: 900px) {
  .page-faq .faq-catalog {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
    align-items: start;
  }

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

  .page-faq .faq-steps > .faq-step:first-child {
    grid-column: 1 / -1;
  }

  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  }

  .page-faq .faq-hero__visual {
    border-left: 1px solid var(--faq-line);
    padding-left: clamp(1.5rem, 3vw, 2.75rem);
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-layout {
    grid-template-columns: 15.5rem minmax(0, 1fr);
    gap: clamp(2rem, 4vw, 3.5rem);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 8.5rem;
  }

  .page-faq .faq-help {
    grid-template-columns: minmax(0, 1fr) minmax(0, .9fr);
  }

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

  .page-faq .faq-steps > .faq-step:first-child {
    grid-column: auto;
  }

  .page-faq .faq-step:nth-child(2) {
    margin-top: 1.75rem;
  }

  .page-faq .faq-step:nth-child(3) {
    margin-top: .75rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-hero__jump a,
  .page-faq .faq-chapter,
  .page-faq .faq-toc a,
  .page-faq .faq-qa__item,
  .page-faq .faq-step,
  .page-faq .faq-related__list a {
    transition: none;
  }

  .page-faq .faq-step:hover,
  .page-faq .faq-related__list a:hover,
  .page-faq .faq-hero__jump a:hover {
    transform: none;
  }
}