.page-faq {
  --faq-line: rgba(58, 65, 82, .85);
  --faq-panel: rgba(11, 16, 38, .82);
  position: relative;
  overflow-x: clip;
  color: var(--ink);
  background:
    radial-gradient(120% 74% at 88% -12%, rgba(56, 242, 192, .10), transparent 62%),
    radial-gradient(90% 60% at 6% 108%, rgba(194, 112, 78, .12), transparent 60%),
    linear-gradient(180deg, var(--indigo) 0%, var(--night) 100%);
}

/* ---------- 面包屑 ---------- */
.page-faq .faq-crumb {
  padding-top: 22px;
}

.page-faq .faq-crumb .crumb {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--muted);
}

.page-faq .faq-crumb .crumb a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 2px solid var(--edge);
  padding-bottom: 1px;
}

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

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  display: grid;
  gap: 28px;
  padding-block: 30px 42px;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: -14px -24px 6px;
  background-image:
    repeating-linear-gradient(90deg, rgba(244, 241, 232, .032) 0 2px, transparent 2px 68px),
    repeating-linear-gradient(0deg, rgba(56, 242, 192, .022) 0 1px, transparent 1px 44px);
  pointer-events: none;
  z-index: 0;
}

.page-faq .faq-hero-main,
.page-faq .faq-hero-side {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero .eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--cyan);
  border-bottom: 2px solid var(--cyan);
  display: inline-block;
  padding-bottom: 6px;
  margin: 0;
}

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(28px, 6.2vw, 48px);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -.015em;
  margin: 14px 0 16px;
  max-width: 20ch;
}

.page-faq .faq-lede {
  max-width: 60ch;
  margin: 0;
  font-size: 16.5px;
  line-height: 1.85;
  color: rgba(244, 241, 232, .84);
}

.page-faq .faq-hero-side {
  display: grid;
  gap: 10px;
  align-content: start;
}

.page-faq .faq-fact {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 12px 14px;
  border: 2px solid var(--edge);
  background: var(--faq-panel);
  box-shadow: var(--shadow-sm);
  transition: border-color .18s ease, transform .18s ease;
}

.page-faq .faq-fact:hover {
  border-color: rgba(56, 242, 192, .6);
  transform: translate(-2px, -2px);
}

.page-faq .faq-fact-num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -.02em;
  color: var(--cyan);
  line-height: 1;
}

.page-faq .faq-fact-label {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 主体双栏 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: 30px;
  padding-bottom: 56px;
}

/* 左栏索引 */
.page-faq .faq-rail-inner {
  display: grid;
  gap: 16px;
}

.page-faq .faq-rail-media {
  width: 100%;
  max-width: 300px;
}

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

.page-faq .faq-rail-title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--muted);
  border-bottom: 2px solid var(--edge);
  padding-bottom: 8px;
}

.page-faq .faq-rail-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-rail-link {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 11px 12px;
  border-left: 4px solid var(--edge-soft);
  color: rgba(244, 241, 232, .82);
  text-decoration: none;
  font-size: 15px;
  line-height: 1.45;
  background: rgba(11, 16, 38, .5);
  transition: color .18s ease, border-color .18s ease, background-color .18s ease, transform .18s ease;
}

.page-faq .faq-rail-link:hover,
.page-faq .faq-rail-link:focus-visible {
  color: var(--paper);
  border-left-color: var(--muted);
  transform: translateX(3px);
}

.page-faq .faq-rail-link.is-active,
.page-faq .faq-rail-link[aria-current="true"] {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background: rgba(56, 242, 192, .1);
}

.page-faq .faq-rail-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--muted);
}

.page-faq .faq-rail-link.is-active .faq-rail-num,
.page-faq .faq-rail-link[aria-current="true"] .faq-rail-num {
  color: var(--cyan);
}

.page-faq .faq-rail-foot {
  margin: 6px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
  border-top: 2px solid var(--edge);
  padding-top: 12px;
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-panels {
  min-width: 0;
}

.page-faq .faq-group {
  margin-bottom: 42px;
  scroll-margin-top: 92px;
}

.page-faq .faq-group-head {
  display: grid;
  gap: 8px;
  border-bottom: 2px solid var(--edge);
  padding-bottom: 14px;
  margin-bottom: 18px;
}

.page-faq .faq-group-title {
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
}

.page-faq .faq-group-title .index-tag {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--amber);
  border-bottom: 2px solid var(--amber);
  padding-bottom: 2px;
}

.page-faq .faq-group-title h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(21px, 3.6vw, 28px);
  font-weight: 800;
  letter-spacing: -.01em;
  line-height: 1.2;
}

.page-faq .faq-group-note {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
  max-width: 62ch;
}

.page-faq .faq-list {
  display: grid;
  gap: 10px;
}

/* ---------- 折叠问答 ---------- */
.page-faq .qa {
  border: 2px solid var(--edge);
  background: linear-gradient(180deg, rgba(19, 26, 58, .92), rgba(11, 16, 38, .92));
  box-shadow: var(--shadow-sm);
  transition: border-color .18s ease, box-shadow .18s ease;
}

.page-faq .qa:hover {
  border-color: rgba(56, 242, 192, .5);
}

.page-faq .qa[open] {
  border-color: var(--cyan);
  box-shadow: var(--shadow-cyan);
}

.page-faq .qa-q {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  line-height: 1.6;
  color: var(--paper);
  transition: color .18s ease, background-color .18s ease;
}

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

.page-faq .qa-q:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -4px;
}

.page-faq .qa[open] .qa-q {
  color: var(--cyan);
  background: rgba(56, 242, 192, .07);
}

.page-faq .qa-index {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--muted);
}

.page-faq .qa[open] .qa-index {
  color: var(--cyan);
}

.page-faq .qa-text {
  flex: 1 1 auto;
  font-weight: 600;
}

.page-faq .qa-q::after {
  content: "+";
  flex: 0 0 auto;
  margin-left: 8px;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--muted);
}

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

.page-faq .qa-a {
  padding: 0 16px 16px;
}

.page-faq .qa-a::before {
  content: "";
  display: block;
  border-top: 1px solid var(--edge-soft);
  margin-bottom: 12px;
}

.page-faq .qa-a p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(244, 241, 232, .84);
}

@keyframes faq-answer-in {
  from {
    opacity: 0;
    transform: translateY(-5px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.page-faq .qa[open] .qa-a {
  animation: faq-answer-in .22s ease-out;
}

/* ---------- 中部图像 ---------- */
.page-faq .faq-figure {
  margin: 0 0 44px;
}

.page-faq .faq-figure .media-frame {
  width: 100%;
}

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

.page-faq .faq-figure .media-caption {
  display: block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--muted);
}

/* ---------- 收尾 ---------- */
.page-faq .faq-next {
  display: grid;
  gap: 18px;
  padding: 24px 22px;
  border: 2px solid var(--edge);
  background: linear-gradient(115deg, rgba(92, 122, 92, .34), rgba(19, 26, 58, .94) 58%);
  box-shadow: var(--shadow-md);
}

.page-faq .faq-next h2 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -.01em;
}

.page-faq .faq-next p {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(244, 241, 232, .84);
}

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

/* ---------- 中等屏幕 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-hero-side {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
  }

  .page-faq .faq-fact {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .page-faq .qa-q {
    padding: 17px 20px;
    font-size: 16.5px;
  }

  .page-faq .qa-a {
    padding: 0 20px 18px 54px;
  }

  .page-faq .faq-next {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    padding: 28px 30px;
  }
}

/* ---------- 桌面：不对称双栏 ---------- */
@media (min-width: 980px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.28fr) minmax(0, .72fr);
    gap: 48px;
    align-items: end;
    padding-block: 44px 56px;
  }

  .page-faq .faq-body {
    grid-template-columns: 296px minmax(0, 1fr);
    gap: 46px;
    padding-bottom: 72px;
  }

  .page-faq .faq-rail-inner {
    position: sticky;
    top: 90px;
    align-content: start;
  }

  .page-faq .faq-figure {
    margin-left: -30px;
    margin-bottom: 52px;
  }

  .page-faq .faq-group {
    margin-bottom: 52px;
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .qa[open] .qa-a {
    animation: none;
  }

  .page-faq .qa,
  .page-faq .qa-q,
  .page-faq .faq-rail-link,
  .page-faq .faq-fact {
    transition: none;
  }

  .page-faq .faq-fact:hover,
  .page-faq .faq-rail-link:hover,
  .page-faq .faq-rail-link:focus-visible {
    transform: none;
  }
}