.page-faq {
  --faq-hair: 1px solid var(--ink-700);
  --faq-gap: clamp(18px, 2.6vw, 32px);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  padding-block: clamp(24px, 3.6vw, 44px) clamp(40px, 6vw, 80px);
  border-bottom: var(--faq-hair);
  background:
    radial-gradient(120% 100% at 92% -12%, rgba(200, 240, 42, 0.10), transparent 58%),
    radial-gradient(90% 80% at -6% 112%, rgba(255, 75, 43, 0.08), transparent 62%),
    var(--ink-950);
}

.page-faq .breadcrumb {
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-faq .faq-hero__eyebrow {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--lime);
  overflow-wrap: anywhere;
}

.page-faq .faq-hero__title {
  margin: clamp(14px, 2.2vw, 24px) 0 0;
  max-width: 14em;
  font-size: clamp(32px, 6.4vw, 82px);
  font-weight: 800;
  line-height: 0.98;
  letter-spacing: -0.04em;
  color: var(--paper-100);
  overflow-wrap: break-word;
}

.page-faq .faq-hero__lead {
  margin: clamp(18px, 2.4vw, 28px) 0 0;
  max-width: 42em;
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.9;
  color: var(--paper-300);
}

.page-faq .faq-hero__quick {
  display: grid;
  gap: 12px;
  margin-top: clamp(28px, 4vw, 48px);
}

.page-faq .faq-quick {
  display: flex;
  flex-direction: column;
  gap: 7px;
  padding: 18px 20px 20px;
  border: var(--faq-hair);
  border-radius: var(--radius);
  background: var(--ink-800);
  box-shadow: var(--shadow-soft);
  text-decoration: none;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

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

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

.page-faq .faq-quick__k {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--lime);
}

.page-faq .faq-quick__t {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--paper-100);
}

.page-faq .faq-quick__d {
  font-size: 13px;
  line-height: 1.7;
  color: var(--ash);
}

/* ---------- 分组筛选 ---------- */

.page-faq .filter-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 14px;
  margin-bottom: clamp(28px, 4vw, 52px);
  border-bottom: var(--faq-hair);
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.page-faq .filter-bar::-webkit-scrollbar {
  display: none;
}

.page-faq .filter-btn {
  flex: none;
  appearance: none;
  padding: 8px 16px;
  border: 1px solid var(--ink-700);
  border-radius: 999px;
  background: var(--ink-800);
  color: var(--paper-300);
  font-family: var(--font-sans);
  font-size: 13px;
  line-height: 1.2;
  white-space: nowrap;
  cursor: pointer;
  transition: color 0.18s ease, background-color 0.18s ease, border-color 0.18s ease;
}

.page-faq .filter-btn:hover {
  border-color: var(--lime);
  color: var(--paper-100);
}

.page-faq .filter-btn:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 2px;
}

.page-faq .filter-btn[aria-pressed="true"] {
  background: var(--lime);
  border-color: var(--lime);
  color: var(--ink-950);
  font-weight: 600;
}

.page-faq .filter-count {
  flex: none;
  margin-left: auto;
  padding-left: 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ash);
  white-space: nowrap;
}

/* ---------- 问答分组 ---------- */

.page-faq .faq-groups {
  display: grid;
  gap: clamp(38px, 5.5vw, 76px);
}

.page-faq .faq-group {
  position: relative;
  display: grid;
  gap: var(--faq-gap);
  padding-top: clamp(22px, 3vw, 34px);
  border-top: var(--faq-hair);
}

.page-faq .faq-group::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 72px;
  height: 3px;
  background: var(--band);
}

.page-faq .faq-group__head {
  display: grid;
  gap: 8px;
}

.page-faq .faq-group__no {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--lime);
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(23px, 3vw, 34px);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--paper-100);
}

.page-faq .faq-group__note {
  margin: 0;
  max-width: 52em;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ash);
}

.page-faq .faq-group__figure {
  margin: 0;
}

.page-faq .faq-group__figure--square .figure__frame {
  aspect-ratio: 1 / 1;
}

.page-faq .faq-group__figure--tall .figure__frame {
  aspect-ratio: 2 / 3;
}

/* ---------- 折叠问答 ---------- */

.page-faq .qa {
  border-bottom: var(--faq-hair);
}

.page-faq .qa > summary {
  position: relative;
  display: block;
  list-style: none;
  padding: 16px 38px 16px 14px;
  border-left: 2px solid transparent;
  color: var(--paper-100);
  font-size: clamp(15px, 1.5vw, 17px);
  font-weight: 600;
  line-height: 1.6;
  cursor: pointer;
  transition: border-color 0.2s ease, color 0.2s ease, background-color 0.2s ease;
}

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

.page-faq .qa > summary::after {
  content: "+";
  position: absolute;
  top: 15px;
  right: 12px;
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1;
  color: var(--ash);
  transition: color 0.2s ease;
}

.page-faq .qa > summary:hover {
  background: var(--ink-800);
}

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

.page-faq .qa[open] > summary {
  border-left-color: var(--lime);
  color: var(--lime);
}

.page-faq .qa[open] > summary::after {
  content: "–";
  color: var(--lime);
}

.page-faq .qa__a {
  padding: 2px 30px 20px 16px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--paper-300);
}

.page-faq .qa[open] .qa__a {
  animation: faq-reveal 0.26s ease-out both;
}

.page-faq .qa__a p {
  margin: 0 0 8px;
  max-width: 46em;
}

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

.page-faq .qa__a a {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(200, 240, 42, 0.42);
}

.page-faq .qa__a a:hover {
  border-bottom-color: var(--lime);
}

@keyframes faq-reveal {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: none; }
}

/* ---------- 值班状态 ---------- */

.page-faq .faq-status {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 16px;
  padding: 12px 16px;
  border: var(--faq-hair);
  border-radius: var(--radius);
  background: var(--ink-800);
  font-size: 13px;
  line-height: 1.6;
  color: var(--paper-300);
}

.page-faq .faq-status__dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
}

.page-faq .faq-status__dot--live {
  background: var(--lime);
  box-shadow: 0 0 0 4px rgba(200, 240, 42, 0.14);
}

.page-faq .faq-status__dot--idle {
  background: var(--amber);
  box-shadow: 0 0 0 4px rgba(255, 179, 32, 0.14);
}

/* ---------- 收束 ---------- */

.page-faq .faq-tail {
  border-top: var(--faq-hair);
}

.page-faq .faq-tail__inner {
  display: grid;
  gap: 14px;
  justify-items: start;
}

.page-faq .faq-tail__k {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--lime);
}

.page-faq .faq-tail__t {
  margin: 0;
  max-width: 24em;
  font-size: clamp(20px, 2.6vw, 28px);
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: -0.02em;
  color: var(--paper-100);
}

.page-faq .faq-tail__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 6px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 680px) {
  .page-faq .faq-hero__quick {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
  }

  .page-faq .faq-group__head {
    grid-template-columns: auto 1fr;
    align-items: baseline;
    gap: 4px 14px;
  }

  .page-faq .faq-group__no {
    grid-row: 1;
  }

  .page-faq .faq-group__title {
    grid-row: 1;
  }

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

  .page-faq .qa__a {
    padding-right: 60px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-group--media-left,
  .page-faq .faq-group--media-right {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    column-gap: clamp(24px, 3.5vw, 52px);
  }

  .page-faq .faq-group--media-left .faq-group__head,
  .page-faq .faq-group--media-right .faq-group__head {
    grid-column: 1 / -1;
  }

  .page-faq .faq-group--media-left .faq-group__figure {
    grid-column: 1 / span 4;
    align-self: start;
  }

  .page-faq .faq-group--media-left .faq-group__body {
    grid-column: 5 / -1;
  }

  .page-faq .faq-group--media-right .faq-group__body {
    grid-column: 1 / span 7;
  }

  .page-faq .faq-group--media-right .faq-group__figure {
    grid-column: 9 / -1;
    align-self: start;
  }

  .page-faq .faq-group__body {
    max-width: 880px;
  }

  .page-faq .faq-tail__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    column-gap: clamp(28px, 5vw, 72px);
  }

  .page-faq .faq-tail__k,
  .page-faq .faq-tail__t {
    grid-column: 1;
  }

  .page-faq .faq-tail__actions {
    grid-column: 2;
    grid-row: 1 / span 2;
    margin-top: 0;
    align-self: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa[open] .qa__a {
    animation: none;
  }

  .page-faq .faq-quick {
    transition: none;
  }

  .page-faq .faq-quick:hover {
    transform: none;
  }
}