.page-faq {
  --faq-line-dark: 1px solid var(--ink-700);
  --faq-line-paper: 1px solid rgba(20, 18, 14, 0.18);
  background: var(--ink-900);
  color: var(--paper);
  font-family: var(--font-body);
  line-height: 1.8;
  overflow-x: hidden;
  padding-bottom: clamp(40px, 7vw, 88px);
}

.page-faq .num {
  font-family: var(--font-mono);
  letter-spacing: 0;
  color: var(--cyan);
  font-weight: 600;
}

.page-faq a {
  color: var(--cyan);
  text-underline-offset: 3px;
}

.page-faq .btn {
  text-decoration: none;
}

/* ---------- 横幅 ---------- */
.page-faq .faq-banner {
  position: relative;
  border-bottom: var(--faq-line-dark);
  background:
    radial-gradient(130% 100% at 88% -10%, rgba(59, 224, 192, 0.16), transparent 58%),
    linear-gradient(180deg, var(--ink-800) 0%, var(--ink-900) 100%);
  padding: clamp(22px, 4vw, 44px) 0 0;
}

.page-faq .faq-banner::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(59, 224, 192, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59, 224, 192, 0.06) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), transparent 78%);
}

.page-faq .faq-banner .wrap {
  position: relative;
  z-index: 1;
}

.page-faq .crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--stone);
  margin: 0 0 clamp(14px, 2.5vw, 22px);
}

.page-faq .crumbs a {
  color: var(--cyan);
  text-decoration: none;
}

.page-faq .crumbs a:hover,
.page-faq .crumbs a:focus-visible {
  text-decoration: underline;
}

.page-faq h1 {
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -0.02em;
  font-size: clamp(28px, 6vw, 54px);
  line-height: 1.16;
  margin: 0 0 clamp(14px, 2vw, 20px);
  max-width: 22ch;
  color: var(--paper);
}

.page-faq .faq-lede {
  max-width: var(--reading);
  font-size: clamp(15px, 1.6vw, 17px);
  color: rgba(243, 236, 221, 0.82);
  margin: 0 0 clamp(20px, 3.5vw, 32px);
}

.page-faq .faq-figures {
  list-style: none;
  margin: 0 0 clamp(22px, 3.5vw, 34px);
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--ink-700);
  border: var(--faq-line-dark);
}

.page-faq .faq-figures li {
  background: var(--ink-800);
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-faq .faq-figures__n {
  font-family: var(--font-mono);
  font-size: clamp(20px, 3vw, 28px);
  line-height: 1.1;
  color: var(--cyan);
}

.page-faq .faq-figures__k {
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--stone);
}

.page-faq .faq-banner__media {
  padding-bottom: clamp(20px, 3.5vw, 34px);
}

.page-faq .faq-banner__media img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 300px;
  object-fit: cover;
  border: var(--faq-line-dark);
  box-shadow: var(--shadow-panel);
  background: var(--ink-800);
}

/* ---------- 分组索引 ---------- */
.page-faq .faq-toc {
  margin: clamp(20px, 3.5vw, 34px) 0 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--ink-700);
  border: var(--faq-line-dark);
}

.page-faq .faq-toc__link {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 8px;
  padding: 11px 13px;
  background: var(--ink-800);
  color: var(--paper);
  text-decoration: none;
  font-size: 14px;
  transition: background 160ms ease, color 160ms ease;
}

.page-faq .faq-toc__idx {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--cyan);
}

.page-faq .faq-toc__name {
  font-weight: 600;
  min-width: 0;
}

.page-faq .faq-toc__n {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--stone);
}

.page-faq .faq-toc__link:hover,
.page-faq .faq-toc__link:focus-visible {
  background: var(--ink-700);
  color: var(--cyan-soft);
  outline: 2px solid var(--orange);
  outline-offset: -2px;
}

/* ---------- 分组外壳 ---------- */
.page-faq .faq-group {
  scroll-margin-top: calc(var(--cmdbar-h) + 18px);
  padding: clamp(30px, 5vw, 56px) 0;
}

.page-faq .faq-group--dark {
  background: var(--ink-900);
  border-top: var(--faq-line-dark);
}

.page-faq .faq-group--paper {
  background: var(--paper);
  color: var(--text-ink);
  border-top: 1px solid rgba(20, 18, 14, 0.2);
  border-bottom: 1px solid rgba(20, 18, 14, 0.2);
}

.page-faq .faq-group--paper a {
  color: var(--orange-ink);
}

.page-faq .faq-group--paper .num {
  color: var(--orange-ink);
}

.page-faq .faq-group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 16px;
  padding-bottom: 14px;
  margin-bottom: clamp(16px, 2.5vw, 24px);
  border-bottom: var(--faq-line-dark);
}

.page-faq .faq-group--paper .faq-group__head {
  border-bottom: var(--faq-line-paper);
}

.page-faq .faq-group__title {
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -0.02em;
  font-size: clamp(20px, 3.4vw, 32px);
  line-height: 1.24;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
}

.page-faq .faq-group__idx {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--orange);
}

.page-faq .faq-group__count {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--stone);
}

.page-faq .faq-group--paper .faq-group__count {
  color: rgba(20, 18, 14, 0.55);
}

.page-faq .faq-group__lede {
  max-width: var(--reading);
  margin: 0 0 clamp(18px, 2.5vw, 26px);
  font-size: 15px;
}

/* ---------- 折叠条目 ---------- */
.page-faq .faq-list {
  border-top: var(--faq-line-dark);
}

.page-faq .faq-group--paper .faq-list {
  border-top: var(--faq-line-paper);
}

.page-faq .faq-item {
  border-bottom: var(--faq-line-dark);
  border-left: 1px solid transparent;
  transition: border-color 180ms ease, background 180ms ease;
}

.page-faq .faq-group--paper .faq-item {
  border-bottom: var(--faq-line-paper);
}

.page-faq .faq-item[open] {
  border-left-color: var(--orange);
  background: rgba(255, 90, 31, 0.05);
}

.page-faq .faq-group--paper .faq-item[open] {
  background: rgba(255, 90, 31, 0.07);
}

.page-faq .faq-item > summary {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  font-size: clamp(15px, 1.7vw, 17px);
  font-weight: 600;
  line-height: 1.6;
  transition: color 160ms ease;
}

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

.page-faq .faq-item > summary:hover {
  color: var(--cyan);
}

.page-faq .faq-group--paper .faq-item > summary:hover {
  color: var(--orange-ink);
}

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

.page-faq .faq-item__q {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .faq-item__dot {
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  margin-top: 9px;
  border-radius: 50%;
  border: 1px solid var(--stone);
  background: transparent;
  transition: background 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
}

.page-faq .faq-item[open] .faq-item__dot {
  background: var(--orange);
  border-color: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 90, 31, 0.18);
}

.page-faq .faq-item__body {
  padding: 0 16px 20px 16px;
  max-width: var(--reading);
  font-size: 15px;
  color: rgba(243, 236, 221, 0.86);
}

.page-faq .faq-group--paper .faq-item__body {
  color: rgba(20, 18, 14, 0.86);
}

.page-faq .faq-item__body > p {
  margin: 0 0 12px;
}

.page-faq .faq-item__body > p:last-child {
  margin-bottom: 0;
}

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

.page-faq .faq-steps li {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 10px;
  align-items: start;
}

.page-faq .faq-step__num {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.9;
  padding: 1px 0;
  color: var(--orange);
  border-top: 2px solid var(--orange);
}

.page-faq .faq-group--paper .faq-step__num {
  color: var(--orange-ink);
  border-top-color: var(--orange-ink);
}

.page-faq .faq-steps--lead li {
  grid-template-columns: 38px 1fr;
  font-size: 15px;
}

/* ---------- 表格 ---------- */
.page-faq .faq-scroll {
  overflow-x: auto;
  margin: 4px 0 14px;
  border: var(--faq-line-dark);
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-group--paper .faq-scroll {
  border: var(--faq-line-paper);
}

.page-faq .faq-table {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  font-size: 13px;
  line-height: 1.6;
}

.page-faq .faq-table caption {
  text-align: left;
  padding: 9px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--stone);
  background: var(--ink-800);
  border-bottom: var(--faq-line-dark);
}

.page-faq .faq-group--paper .faq-table caption {
  color: rgba(20, 18, 14, 0.6);
  background: var(--paper-2);
  border-bottom: var(--faq-line-paper);
}

.page-faq .faq-table th,
.page-faq .faq-table td {
  padding: 8px 12px;
  text-align: left;
  vertical-align: top;
}

.page-faq .faq-table thead th {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  font-weight: 400;
  color: var(--cyan);
  background: rgba(26, 74, 59, 0.5);
  border-bottom: var(--faq-line-dark);
}

.page-faq .faq-group--paper .faq-table thead th {
  color: var(--orange-ink);
  background: var(--paper-2);
  border-bottom: var(--faq-line-paper);
}

.page-faq .faq-table tbody th {
  font-family: var(--font-mono);
  font-weight: 400;
  color: var(--cyan);
  white-space: nowrap;
}

.page-faq .faq-group--paper .faq-table tbody th {
  color: var(--orange-ink);
}

.page-faq .faq-table tbody tr:nth-child(even) {
  background: rgba(26, 74, 59, 0.22);
}

.page-faq .faq-group--paper .faq-table tbody tr:nth-child(even) {
  background: var(--paper-2);
}

.page-faq .faq-table tbody tr:hover,
.page-faq .faq-table tbody tr:focus-within {
  background: rgba(59, 224, 192, 0.12);
}

.page-faq .faq-group--paper .faq-table tbody tr:hover,
.page-faq .faq-group--paper .faq-table tbody tr:focus-within {
  background: rgba(255, 90, 31, 0.1);
}

/* ---------- 插图 ---------- */
.page-faq .faq-figure {
  margin: clamp(22px, 3vw, 34px) 0 0;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: var(--faq-line-dark);
  box-shadow: var(--shadow-panel);
  background: var(--ink-800);
}

.page-faq .faq-figure figcaption {
  margin-top: 8px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--stone);
}

/* ---------- 兜底区 ---------- */
.page-faq .faq-group--fallback {
  background:
    radial-gradient(120% 120% at 12% 0%, rgba(255, 90, 31, 0.14), transparent 62%),
    var(--ink-800);
  border-top: var(--faq-line-dark);
}

.page-faq .faq-group--fallback .faq-group__head {
  border-bottom-color: var(--orange);
}

.page-faq .faq-steps--lead {
  margin-bottom: clamp(20px, 3vw, 28px);
}

.page-faq .faq-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-faq .faq-cta .btn {
  min-width: 148px;
  text-align: center;
}

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

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

  .page-faq .faq-item > summary {
    padding: 17px 20px;
  }

  .page-faq .faq-item__body {
    padding: 0 20px 22px 44px;
  }
}

@media (min-width: 1080px) {
  .page-faq .faq-toc {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-faq .faq-banner__media img {
    max-height: 340px;
  }

  .page-faq .faq-group__head {
    align-items: flex-end;
  }
}