.page-faq {
  --faq-index-w: 252px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  background: var(--ink);
  color: #fff;
  padding: calc(var(--header-offset) + 16px) 0 clamp(44px, 7vw, 88px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -20%;
  left: -14%;
  width: 48%;
  height: 96%;
  background: radial-gradient(circle at 32% 32%, rgba(20, 210, 194, .22), transparent 68%);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -16%;
  bottom: -58%;
  width: 62%;
  height: 112%;
  background: var(--grad-warm);
  opacity: .18;
  transform: rotate(-16deg);
  border-radius: 48px;
  pointer-events: none;
}

.page-faq .faq-hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 32px;
}

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

.page-faq .faq-hero .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 18px;
  font-size: 13px;
  color: rgba(255, 255, 255, .6);
}

.page-faq .faq-hero .breadcrumb a {
  color: rgba(255, 255, 255, .84);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 255, 255, .28);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

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

.page-faq .faq-hero .eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .14em;
  color: var(--cyan);
}

.page-faq .faq-hero h1 {
  margin: 0 0 20px;
  font-size: clamp(29px, 4.4vw, 54px);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -.01em;
  color: #fff;
}

.page-faq .faq-hero .lede {
  max-width: 46ch;
  margin: 0 0 28px;
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.75;
  color: rgba(255, 255, 255, .76);
}

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

.page-faq .faq-hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 34px;
  margin: 32px 0 0;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, .14);
}

.page-faq .faq-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin: 0;
}

.page-faq .faq-stat dt {
  margin: 0;
  font-size: 12px;
  letter-spacing: .04em;
  color: rgba(255, 255, 255, .55);
}

.page-faq .faq-stat dd {
  margin: 0;
  font-size: 15px;
  font-weight: 600;
  color: #fff;
}

.page-faq .faq-stat .mono {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  color: var(--cyan);
}

.page-faq .faq-hero-media {
  margin: 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, .16);
  background: var(--ink-2);
  box-shadow: var(--shadow-2);
}

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

/* ---------- 主体骨架 ---------- */
.page-faq .faq-body {
  padding: clamp(36px, 6vw, 72px) 0 clamp(48px, 7vw, 96px);
}

.page-faq .faq-layout {
  display: grid;
  gap: 28px;
}

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

/* ---------- 左侧索引 ---------- */
.page-faq .faq-index {
  min-width: 0;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--paper);
  box-shadow: var(--shadow-1);
}

.page-faq .faq-index-title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .14em;
  color: var(--gray);
}

.page-faq .faq-index-list {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 4px;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.page-faq .faq-index-list::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-index-link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex: none;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  font-size: 13.5px;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .faq-index-link:hover {
  border-color: var(--flame);
  color: var(--flame);
}

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

.page-faq .faq-index-num {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .08em;
  color: var(--flame);
}

.page-faq .faq-index-save {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-index-save p {
  margin: 0 0 12px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--gray);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  margin: 0 0 clamp(36px, 5vw, 56px);
  scroll-margin-top: calc(var(--header-offset) + 20px);
}

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

.page-faq .faq-group-head {
  position: relative;
  padding-top: 20px;
  margin-bottom: 18px;
}

.page-faq .faq-group-head::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 72px;
  height: 2px;
  border-radius: 2px;
  background: var(--grad-warm);
}

.page-faq .faq-group-title {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 0 0 8px;
  font-size: clamp(20px, 2.6vw, 27px);
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--ink);
}

.page-faq .faq-group-title .mono {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .14em;
  color: var(--gray);
}

.page-faq .faq-group-sub {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--gray);
}

/* ---------- 折叠条目 ---------- */
.page-faq .faq-item {
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--paper);
  box-shadow: var(--shadow-1);
  transition: box-shadow var(--dur) var(--ease);
}

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

.page-faq .faq-item[open] {
  box-shadow: var(--shadow-2);
}

.page-faq .faq-q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px;
  cursor: pointer;
  list-style: none;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--ink);
  transition: color var(--dur) var(--ease);
}

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

.page-faq .faq-q:hover {
  color: var(--flame);
}

.page-faq .faq-q:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
  border-radius: var(--r-md);
}

.page-faq .faq-q-num {
  flex: none;
  padding-top: 4px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: .08em;
  color: var(--flame);
}

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

.page-faq .faq-q-icon {
  position: relative;
  flex: none;
  width: 16px;
  height: 16px;
  margin-top: 4px;
}

.page-faq .faq-q-icon::before,
.page-faq .faq-q-icon::after {
  content: "";
  position: absolute;
  background: var(--gray);
  border-radius: 2px;
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-q-icon::before {
  top: 7px;
  left: 0;
  width: 16px;
  height: 2px;
}

.page-faq .faq-q-icon::after {
  top: 0;
  left: 7px;
  width: 2px;
  height: 16px;
}

.page-faq .faq-item[open] .faq-q-icon::before {
  background: var(--flame);
}

.page-faq .faq-item[open] .faq-q-icon::after {
  transform: scaleY(0);
}

.page-faq .faq-a {
  padding: 0 14px 16px;
}

.page-faq .faq-a p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-2);
}

.page-faq .faq-item[open] .faq-a {
  animation: faqPanelIn var(--dur) var(--ease) both;
}

@keyframes faqPanelIn {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 图中插图 ---------- */
.page-faq .faq-figure {
  margin: 18px 0 20px;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-1);
}

.page-faq .faq-figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--gray);
}

/* ---------- 每组出口 ---------- */
.page-faq .faq-next {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 20px;
  margin-top: 18px;
  padding: 14px 18px;
  border: 1px dashed var(--line);
  border-radius: var(--r-md);
  background: var(--mist);
}

.page-faq .faq-next p {
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--gray);
}

.page-faq .faq-next .link-arrow {
  flex: none;
  font-size: 14px;
  font-weight: 700;
  color: var(--flame);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-next .link-arrow:hover,
.page-faq .faq-next .link-arrow:focus-visible {
  color: var(--ink);
}

.page-faq .faq-next .link-arrow:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: var(--r-xs);
}

/* ---------- 尾部 ---------- */
.page-faq .faq-outro {
  position: relative;
  overflow: hidden;
  background: var(--ink);
  color: #fff;
  padding: clamp(40px, 6vw, 72px) 0;
}

.page-faq .faq-outro::after {
  content: "";
  position: absolute;
  right: -10%;
  top: -50%;
  width: 38%;
  height: 200%;
  background: var(--grad-track);
  opacity: .13;
  transform: rotate(18deg);
  pointer-events: none;
}

.page-faq .faq-outro-inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 24px;
}

.page-faq .faq-outro h2 {
  margin: 0 0 12px;
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 800;
  line-height: 1.25;
  color: #fff;
}

.page-faq .faq-outro p {
  max-width: 58ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(255, 255, 255, .74);
}

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

/* ---------- 桌面端布局 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-q {
    padding: 16px 18px;
    gap: 14px;
  }

  .page-faq .faq-a {
    padding: 0 18px 18px 58px;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-hero-inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: center;
    gap: 56px;
  }

  .page-faq .faq-layout {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    align-items: start;
    gap: 56px;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-offset) + 16px);
    padding: 20px;
  }

  .page-faq .faq-index-list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-index-link {
    padding: 9px 12px;
    border-color: transparent;
    border-radius: var(--r-sm);
    line-height: 1.4;
    white-space: normal;
  }

  .page-faq .faq-index-link:hover {
    background: var(--mist);
    border-color: var(--line);
  }

  .page-faq .faq-outro-inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 40px;
  }
}

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

  .page-faq .faq-item,
  .page-faq .faq-q,
  .page-faq .faq-index-link,
  .page-faq .faq-q-icon::before,
  .page-faq .faq-q-icon::after {
    transition: none;
  }
}