.page-faq {
  --faq-paper-line: rgba(36, 27, 22, .14);
  --faq-gap: clamp(20px, 3.2vw, 40px);
  position: relative;
}

/* ---------- 面包屑 ---------- */
.page-faq .faq-crumbs {
  padding-top: clamp(20px, 4vw, 44px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(30px, 5.6vw, 68px) 0 clamp(44px, 7vw, 88px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -26%;
  right: -12%;
  width: min(720px, 78vw);
  aspect-ratio: 1 / 1;
  background: radial-gradient(circle at 35% 35%, rgba(232, 85, 45, .30), rgba(232, 85, 45, 0) 62%);
  pointer-events: none;
  z-index: 0;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  top: 14%;
  left: -8%;
  width: min(400px, 50vw);
  aspect-ratio: 1 / 1;
  background: radial-gradient(circle at 60% 60%, rgba(79, 195, 247, .18), rgba(79, 195, 247, 0) 66%);
  pointer-events: none;
  z-index: 0;
}

.page-faq .faq-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 5vw, 56px);
  align-items: end;
}

.page-faq .faq-hero-copy {
  min-width: 0;
}

.page-faq .faq-hero .section-kicker {
  margin: 0;
  color: var(--ember-hi);
  font-size: 12px;
  letter-spacing: .2em;
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(31px, 5.2vw, 60px);
  line-height: 1.12;
  letter-spacing: -.02em;
  color: var(--mist);
  max-width: 17em;
}

.page-faq .faq-hero .lede {
  margin: clamp(16px, 2.4vw, 26px) 0 0;
  max-width: 44em;
  font-size: clamp(16px, 1.5vw, 18px);
  line-height: 1.85;
  color: rgba(245, 247, 250, .78);
}

.page-faq .faq-hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-faq .faq-hero-figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(176, 122, 60, .38);
  box-shadow: var(--shadow);
  background: linear-gradient(150deg, var(--ice-deep), var(--ink-2) 72%);
}

.page-faq .faq-hero-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

@media (min-width: 900px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }
}

/* ---------- 主体布局 ---------- */
.page-faq .faq-body {
  padding: clamp(34px, 5.6vw, 72px) 0 clamp(56px, 9vw, 120px);
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
  align-items: start;
}

@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(0, 256px) minmax(0, 1fr);
    gap: clamp(28px, 3.4vw, 54px);
  }
}

/* ---------- 左侧索引 ---------- */
.page-faq .faq-rail {
  min-width: 0;
}

@media (min-width: 1000px) {
  .page-faq .faq-rail {
    position: sticky;
    top: 112px;
  }
}

.page-faq .faq-rail-panel {
  padding: clamp(16px, 2.2vw, 24px);
  border-radius: var(--radius);
}

.page-faq .faq-rail-label {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--ice);
  opacity: .92;
}

.page-faq .faq-rail .index-rail {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-faq .faq-rail .index-link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 12px;
  border-left: 2px solid rgba(176, 122, 60, .28);
  color: rgba(245, 247, 250, .74);
  text-decoration: none;
  font-size: 15px;
  line-height: 1.5;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-rail .index-link:hover,
.page-faq .faq-rail .index-link:focus-visible {
  color: var(--mist);
  background: rgba(79, 195, 247, .10);
  border-left-color: var(--ice);
  outline: none;
}

.page-faq .faq-rail .index-link.is-active {
  color: var(--mist);
  background: rgba(232, 85, 45, .16);
  border-left-color: var(--ember);
}

.page-faq .faq-index-num {
  flex: 0 0 auto;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--ember-hi);
}

.page-faq .faq-index-name {
  min-width: 0;
}

/* ---------- 问答流 ---------- */
.page-faq .faq-stream {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: clamp(20px, 3vw, 34px);
}

.page-faq .faq-group {
  padding: clamp(20px, 3.2vw, 40px);
  border-radius: var(--radius-lg);
  scroll-margin-top: 130px;
}

.page-faq .faq-group-head {
  display: flex;
  align-items: flex-start;
  gap: clamp(14px, 2vw, 26px);
  margin-bottom: clamp(16px, 2.4vw, 26px);
}

.page-faq .faq-chapter {
  flex: 0 0 auto;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(40px, 6.6vw, 72px);
  line-height: .86;
  letter-spacing: -.03em;
  color: rgba(232, 85, 45, .16);
  -webkit-text-stroke: 1.4px rgba(232, 85, 45, .58);
}

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

.page-faq .faq-group .section-kicker {
  margin: 0;
  color: var(--ember);
  font-size: 12px;
  letter-spacing: .18em;
}

.page-faq .faq-group .section-title {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(21px, 2.6vw, 30px);
  line-height: 1.26;
  color: var(--sepia);
}

/* ---------- 快速定位 ---------- */
.page-faq .faq-guide-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 2.6vw, 32px);
}

.page-faq .faq-guide-text {
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(36, 27, 22, .84);
}

.page-faq .faq-guide-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-faq .faq-guide-list li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 10px 14px;
  border-radius: 12px;
  background: rgba(176, 122, 60, .08);
  border-left: 2px solid rgba(176, 122, 60, .45);
  font-size: 15px;
  line-height: 1.65;
  color: rgba(36, 27, 22, .82);
}

.page-faq .faq-guide-list .mono {
  flex: 0 0 auto;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--copper);
}

@media (min-width: 760px) {
  .page-faq .faq-guide-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }
}

/* ---------- 折叠问答条目 ---------- */
.page-faq .faq-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--faq-paper-line);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--faq-paper-line);
}

.page-faq .faq-item summary {
  list-style: none;
  cursor: pointer;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: clamp(12px, 1.8vw, 20px);
  align-items: start;
  padding: clamp(15px, 2.1vw, 22px) 0;
  color: var(--sepia);
}

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

.page-faq .faq-item summary::marker {
  content: "";
}

.page-faq .faq-item summary:focus-visible {
  outline: 2px solid var(--ember);
  outline-offset: 4px;
  border-radius: 6px;
}

.page-faq .faq-q-idx {
  padding-top: 3px;
  font-size: 13px;
  line-height: 1.7;
  letter-spacing: .06em;
  color: var(--copper);
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-q-text {
  min-width: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(16px, 1.5vw, 18px);
  line-height: 1.6;
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-item summary:hover .faq-q-text {
  color: var(--ember);
}

.page-faq .faq-item summary:hover .faq-q-idx {
  color: var(--ember-hi);
}

.page-faq .faq-item[open] .faq-q-text {
  color: var(--ember);
}

.page-faq .faq-mark {
  position: relative;
  flex: 0 0 auto;
  width: 22px;
  height: 22px;
  margin-top: 3px;
  border-radius: 50%;
  border: 1px solid rgba(176, 122, 60, .55);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-mark::before,
.page-faq .faq-mark::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 10px;
  height: 1.6px;
  background: var(--copper);
  transform: translate(-50%, -50%);
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-mark::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.page-faq .faq-item[open] .faq-mark {
  background: var(--ember);
  border-color: var(--ember);
}

.page-faq .faq-item[open] .faq-mark::before,
.page-faq .faq-item[open] .faq-mark::after {
  background: var(--paper);
}

.page-faq .faq-item[open] .faq-mark::after {
  transform: translate(-50%, -50%) rotate(90deg) scaleX(0);
}

.page-faq .faq-a {
  padding: 0 clamp(8px, 2vw, 40px) clamp(18px, 2.4vw, 26px) clamp(28px, 4vw, 52px);
  font-size: 16px;
  line-height: 1.85;
  color: rgba(36, 27, 22, .84);
  animation: faq-panel-in 260ms var(--ease) both;
}

.page-faq .faq-a p {
  margin: 0;
}

.page-faq .faq-a p + p {
  margin-top: 10px;
}

.page-faq .faq-a a {
  color: var(--ember);
  text-decoration: none;
  border-bottom: 1px solid rgba(232, 85, 45, .42);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

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

@keyframes faq-panel-in {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- 档案横带 ---------- */
.page-faq .faq-band {
  position: relative;
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(176, 122, 60, .34);
  background: linear-gradient(120deg, rgba(30, 92, 122, .38), rgba(14, 16, 19, .92));
}

.page-faq .faq-band img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
  opacity: .92;
}

.page-faq .faq-band-cap {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 14px clamp(16px, 2.4vw, 24px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: rgba(245, 247, 250, .84);
  background: linear-gradient(to top, rgba(14, 16, 19, .92), rgba(14, 16, 19, 0));
}

/* ---------- 窄屏与偏好设置 ---------- */
@media (max-width: 560px) {
  .page-faq .faq-group-head {
    flex-direction: column;
    gap: 10px;
  }

  .page-faq .faq-chapter {
    font-size: 36px;
    line-height: 1;
  }

  .page-faq .faq-a {
    padding-left: 0;
    padding-right: 0;
  }

  .page-faq .faq-q-idx {
    padding-top: 2px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-a {
    animation: none;
  }

  .page-faq .faq-mark,
  .page-faq .faq-mark::before,
  .page-faq .faq-mark::after,
  .page-faq .faq-q-text,
  .page-faq .faq-q-idx,
  .page-faq .faq-rail .index-link {
    transition: none;
  }
}