.page-faq {
  --faq-side-w: 246px;
  --faq-tint: rgba(232, 237, 245, 0.04);
  display: block;
  background: var(--ink-0);
  color: var(--text);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: 30px 0 40px;
  border-bottom: var(--edge);
  background:
    radial-gradient(660px 300px at 8% -30%, rgba(0, 229, 255, 0.16), transparent 68%),
    radial-gradient(540px 280px at 98% -12%, rgba(177, 75, 255, 0.16), transparent 70%),
    var(--ink-0);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--faq-tint) 1px, transparent 1px),
    linear-gradient(90deg, var(--faq-tint) 1px, transparent 1px);
  background-size: 72px 72px;
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: -10%;
  top: -60px;
  width: 130%;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(228, 0, 43, 0.75), transparent);
  transform: rotate(-6deg);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 26px;
}

.page-faq .faq-hero__eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--cyan);
  margin: 0;
}

.page-faq .faq-hero__title {
  margin: 10px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(32px, 7.2vw, 70px);
  line-height: 1.03;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

.page-faq .faq-hero__lede {
  margin: 16px 0 0;
  max-width: 52ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
}

.page-faq .faq-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.page-faq .faq-hero__stat {
  border: var(--edge);
  background: var(--ink-1);
  box-shadow: var(--shadow-hard-sm);
  padding: 12px 12px 14px;
}

.page-faq .faq-hero__stat b {
  display: block;
  font-family: var(--font-mono);
  font-size: 21px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--cyan);
}

.page-faq .faq-hero__stat:nth-child(2n) b {
  color: var(--violet);
}

.page-faq .faq-hero__stat span {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  line-height: 1.5;
  color: var(--muted);
}

/* ---------- 筛选条 ---------- */
.page-faq .faq-toolbar {
  padding: 18px 0 20px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(18, 22, 31, 0.92), rgba(11, 14, 19, 0.5));
}

.page-faq .faq-toolbar__row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 20px;
  align-items: center;
  justify-content: space-between;
}

.page-faq .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .filter-btn {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  padding: 8px 12px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.page-faq .filter-btn:hover,
.page-faq .filter-btn:focus-visible {
  color: var(--text);
  border-color: var(--cyan);
}

.page-faq .filter-btn[aria-pressed="true"] {
  color: var(--text);
  border-color: var(--red);
  background: rgba(228, 0, 43, 0.16);
  box-shadow: var(--shadow-hard-sm);
}

.page-faq .faq-toolbar__count {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.page-faq .filter-count {
  color: var(--red);
}

/* ---------- 主体 ---------- */
.page-faq .faq-shell {
  padding: 30px 0 64px;
}

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

.page-faq .faq-side {
  border: var(--edge);
  background: var(--ink-1);
  box-shadow: var(--shadow-hard-sm);
  padding: 16px 0 14px;
}

.page-faq .faq-side__title {
  margin: 0;
  padding: 0 16px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .faq-index {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-index__link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
  padding: 11px 16px;
  border-left: 3px solid transparent;
  color: var(--text);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.5;
  transition: border-color 0.2s ease, background 0.2s ease;
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  border-left-color: var(--red);
  background: rgba(228, 0, 43, 0.1);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan);
  letter-spacing: 0.04em;
}

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

.page-faq .faq-side__foot {
  margin: 14px 16px 0;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted);
}

.page-faq .faq-side__foot a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 255, 0.4);
}

.page-faq .faq-content {
  min-width: 0;
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: 100px;
}

.page-faq .faq-group + .faq-group {
  margin-top: 46px;
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: 6px 12px;
  padding-bottom: 12px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group__num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--red);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(22px, 4.2vw, 34px);
  letter-spacing: -0.01em;
  line-height: 1.15;
}

.page-faq .faq-group__note {
  grid-column: 2 / -1;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-faq .faq-figure {
  margin: 0 0 20px;
}

.page-faq .media-frame__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: var(--edge);
}

.page-faq .media-frame__caption {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

/* ---------- 折叠问答 ---------- */
.page-faq .accordion__item {
  border: 2px solid var(--line);
  border-radius: var(--radius);
  background: var(--ink-1);
  margin-bottom: 14px;
  transition: box-shadow 0.25s ease, border-color 0.25s ease, transform 0.25s ease;
}

.page-faq .accordion__item:hover {
  border-color: var(--line-strong);
  box-shadow: var(--shadow-hard-sm);
}

.page-faq .accordion__item[data-open] {
  border-color: var(--red);
  box-shadow: var(--shadow-hard);
  transform: translate(-2px, -2px);
}

.page-faq .accordion__trigger {
  width: 100%;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 12px;
  align-items: start;
  padding: 15px 16px;
  border: 0;
  background: transparent;
  color: var(--text);
  text-align: left;
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
}

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

.page-faq .faq-qmark {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--red);
  padding-top: 3px;
}

.page-faq .accordion__label {
  display: block;
  min-width: 0;
}

.page-faq .faq-caret {
  font-family: var(--font-mono);
  font-size: 17px;
  line-height: 1;
  color: var(--cyan);
  padding-top: 2px;
}

.page-faq .accordion__item[data-open] .faq-caret {
  color: var(--red);
}

.page-faq .accordion__panel {
  display: none;
}

.page-faq .accordion__item[data-open] .accordion__panel {
  display: block;
}

.page-faq .accordion__inner {
  padding: 2px 16px 18px 41px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text);
}

.page-faq .accordion__inner > p {
  margin: 0;
  max-width: 62ch;
}

/* ---------- 步骤卡 ---------- */
.page-faq .faq-steps {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .faq-step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--cyan);
  background: rgba(0, 229, 255, 0.05);
}

.page-faq .faq-step__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--cyan);
  padding-top: 2px;
}

.page-faq .faq-step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
}

.page-faq .faq-actions {
  margin-top: 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.page-faq .copy-btn {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  padding: 7px 12px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: transparent;
  color: var(--cyan);
  cursor: pointer;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, color 0.2s ease;
}

.page-faq .copy-btn:hover,
.page-faq .copy-btn:focus-visible {
  border-color: var(--cyan);
  box-shadow: var(--shadow-hard-sm);
}

.page-faq .copy-btn[data-copied] {
  color: var(--amber);
  border-color: var(--amber);
}

/* ---------- 数据条 ---------- */
.page-faq .faq-datastrip {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 30px;
  align-items: center;
  margin: 26px 0 6px;
  padding: 12px 16px;
  background: var(--wine);
  border: 1px solid var(--line-strong);
  border-left: 3px solid var(--red);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.page-faq .faq-datastrip__item b {
  font-weight: 600;
  color: var(--cyan);
}

/* ---------- 收尾 ---------- */
.page-faq .faq-cta {
  margin-top: 48px;
  padding: 26px 20px;
  border: var(--edge);
  box-shadow: var(--shadow-hard);
  background:
    linear-gradient(135deg, rgba(36, 26, 77, 0.92) 0%, rgba(18, 22, 31, 0.96) 62%),
    var(--ink-1);
  display: grid;
  gap: 18px;
}

.page-faq .faq-cta__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(22px, 4vw, 32px);
  letter-spacing: -0.01em;
}

.page-faq .faq-cta__body {
  margin: 10px 0 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text);
}

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

/* ---------- 平板与桌面 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-group__head {
    grid-template-columns: 60px minmax(0, 1fr) auto;
    gap: 14px;
  }

  .page-faq .faq-group__note {
    grid-column: auto;
    text-align: right;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero {
    padding: 56px 0 60px;
  }

  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.5fr) minmax(300px, 0.72fr);
    gap: 48px;
    align-items: end;
  }

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

  .page-faq .faq-shell {
    padding: 44px 0 80px;
  }

  .page-faq .faq-grid {
    grid-template-columns: var(--faq-side-w) minmax(0, 1fr);
    gap: 52px;
    align-items: start;
  }

  .page-faq .faq-side {
    position: sticky;
    top: 96px;
  }

  .page-faq .accordion__inner {
    padding: 4px 22px 22px 44px;
  }

  .page-faq .faq-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    padding: 32px 30px;
  }

  .page-faq .faq-cta__actions {
    flex-direction: column;
    align-items: stretch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .accordion__item,
  .page-faq .filter-btn,
  .page-faq .faq-index__link,
  .page-faq .copy-btn {
    transition: none;
  }

  .page-faq .accordion__item[data-open] {
    transform: none;
  }
}