.page-faq {
  --faq-grid: rgba(60, 74, 68, 0.34);
  --faq-hair: rgba(201, 255, 51, 0.32);
  position: relative;
}

/* ---------- Hero ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(16px, 3vw, 34px) 0 clamp(26px, 5vw, 52px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -30%;
  right: -14%;
  width: min(840px, 98vw);
  height: min(640px, 80vw);
  background: linear-gradient(140deg, rgba(201, 255, 51, 0.18) 0%, rgba(201, 255, 51, 0.03) 48%, rgba(201, 255, 51, 0) 74%);
  clip-path: polygon(24% 0%, 100% 0%, 100% 72%, 0% 100%);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(90deg, var(--faq-grid) 0 1px, transparent 1px 58px);
  opacity: 0.45;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 72%);
  mask-image: linear-gradient(180deg, #000 0%, transparent 72%);
  pointer-events: none;
}

.page-faq .faq-hero > .shell {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 4vw, 44px);
  margin-top: clamp(18px, 3vw, 32px);
}

@media (min-width: 900px) {
  .page-faq .faq-hero-inner {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
    align-items: end;
  }
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  max-width: 17ch;
  font-family: var(--font-display);
  font-size: clamp(31px, 6.6vw, 62px);
  font-weight: 800;
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-faq .faq-lede {
  margin: 16px 0 0;
  max-width: 48ch;
  font-size: 16px;
  line-height: 1.72;
  color: var(--grey);
}

.page-faq .faq-hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(14px, 3vw, 34px);
  margin: clamp(22px, 4vw, 34px) 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero-stats li {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding-left: 14px;
  border-left: 2px solid var(--faq-hair);
}

.page-faq .faq-stat-num {
  display: flex;
  align-items: baseline;
  gap: 3px;
  font-family: var(--font-mono);
  font-size: clamp(23px, 4vw, 33px);
  font-weight: 700;
  line-height: 1;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-stat-unit {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--accent-soft);
}

.page-faq .faq-stat-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--grey);
}

.page-faq .faq-hero-figure {
  margin: 0;
}

.page-faq .faq-hero-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% 84%, 90% 100%, 0 100%);
}

/* ---------- 布局 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 4vw, 48px);
  padding-top: clamp(8px, 2vw, 22px);
}

@media (min-width: 960px) {
  .page-faq .faq-body {
    grid-template-columns: 230px minmax(0, 1fr);
    align-items: start;
    gap: clamp(30px, 5vw, 72px);
  }
}

/* ---------- 左侧分类导轨 ---------- */
.page-faq .faq-rail-inner {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

@media (min-width: 960px) {
  .page-faq .faq-rail-inner {
    position: sticky;
    top: 108px;
  }
}

.page-faq .faq-rail-title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--grey);
}

.page-faq .faq-rail-list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

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

@media (min-width: 960px) {
  .page-faq .faq-rail-list {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
  }
}

.page-faq .faq-rail-link {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 0 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--grey);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.22s var(--ease), background 0.22s var(--ease), border-color 0.22s var(--ease);
}

.page-faq .faq-rail-link::before {
  content: "";
  flex: none;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.6;
}

.page-faq .faq-rail-link:hover,
.page-faq .faq-rail-link:focus-visible {
  color: var(--ink);
  border-color: var(--faq-hair);
}

.page-faq .faq-rail-link[aria-current="true"] {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  position: relative;
  padding: clamp(20px, 3.4vw, 32px) 0 clamp(22px, 4vw, 38px);
  border-top: 1px solid var(--line);
  scroll-margin-top: 122px;
}

.page-faq .faq-group::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 46px;
  background-image: repeating-linear-gradient(90deg, var(--faq-grid) 0 1px, transparent 1px 46px);
  pointer-events: none;
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(10px, 2vw, 22px);
}

.page-faq .faq-group-head {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin: 0 0 16px;
}

.page-faq .faq-group-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(21px, 3vw, 28px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-faq .faq-group-head::after {
  content: "";
  flex: 1;
  height: 1px;
  align-self: center;
  background: linear-gradient(90deg, var(--line) 0%, transparent 100%);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-item {
  position: relative;
  padding-left: 16px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: linear-gradient(180deg, var(--accent) 0%, rgba(201, 255, 51, 0.05) 100%);
  opacity: 0.26;
  transition: opacity 0.24s var(--ease);
}

.page-faq .faq-item[open]::before {
  opacity: 1;
}

.page-faq .faq-q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  min-height: 44px;
  padding: 17px 4px;
  cursor: pointer;
  list-style: none;
  -webkit-tap-highlight-color: transparent;
}

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

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

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

.page-faq .faq-q-num {
  flex: none;
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  opacity: 0.85;
}

.page-faq .faq-q-text {
  flex: 1;
  min-width: 0;
  font-size: clamp(16px, 1.9vw, 19px);
  font-weight: 700;
  line-height: 1.5;
  color: var(--ink);
  transition: color 0.22s var(--ease);
}

.page-faq .faq-q:hover .faq-q-text {
  color: var(--accent-soft);
}

.page-faq .faq-q-mark {
  position: relative;
  flex: none;
  width: 20px;
  height: 20px;
  margin-top: 4px;
}

.page-faq .faq-q-mark::before,
.page-faq .faq-q-mark::after {
  content: "";
  position: absolute;
  background: var(--accent);
  transition: transform 0.24s var(--ease), opacity 0.24s var(--ease);
}

.page-faq .faq-q-mark::before {
  left: 1px;
  right: 1px;
  top: 50%;
  height: 2px;
  margin-top: -1px;
}

.page-faq .faq-q-mark::after {
  top: 1px;
  bottom: 1px;
  left: 50%;
  width: 2px;
  margin-left: -1px;
}

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

.page-faq .faq-a {
  padding: 0 4px 22px 34px;
  animation: faq-answer-in 0.26s var(--ease) both;
}

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

.page-faq .faq-a p {
  margin: 0 0 10px;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--grey);
}

.page-faq .faq-a p:last-of-type {
  margin-bottom: 0;
}

.page-faq .faq-t {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  padding: 0 1px;
}

/* ---------- 跳转按钮 ---------- */
.page-faq .faq-jump {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  margin-top: 12px;
  padding: 0 18px;
  border: 1px solid var(--faq-hair);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--accent);
  text-decoration: none;
  transition: background 0.24s var(--ease), color 0.24s var(--ease), border-color 0.24s var(--ease);
}

.page-faq .faq-jump:hover,
.page-faq .faq-jump:focus-visible {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
}

.page-faq .faq-jump-target {
  display: inline-block;
  max-width: 0;
  overflow: hidden;
  white-space: nowrap;
  opacity: 0;
  transition: max-width 0.32s var(--ease), opacity 0.32s var(--ease);
}

.page-faq .faq-jump:hover .faq-jump-target,
.page-faq .faq-jump:focus-visible .faq-jump-target {
  max-width: 220px;
  opacity: 0.85;
}

/* ---------- 移动端章节里的配图 ---------- */
.page-faq .faq-figure {
  margin: 20px 0 24px 34px;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 7% 100%, 0 86%);
}

/* ---------- 收尾联系区 ---------- */
.page-faq .faq-group--last {
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-help {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(18px, 3vw, 30px);
  padding: clamp(20px, 3.6vw, 32px);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  background: var(--panel);
}

@media (min-width: 760px) {
  .page-faq .faq-help {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.85fr);
    align-items: center;
  }
}

.page-faq .faq-help-copy p {
  margin: 0 0 12px;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--grey);
}

.page-faq .faq-help-copy .btn {
  margin-top: 6px;
}

.page-faq .faq-contact {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding-left: clamp(0px, 2vw, 22px);
}

@media (min-width: 760px) {
  .page-faq .faq-contact {
    border-left: 1px solid var(--line);
  }
}

.page-faq .faq-contact-line {
  display: flex;
  flex-direction: column;
  gap: 5px;
  margin: 0;
}

.page-faq .faq-contact-key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--grey);
  text-transform: uppercase;
}

.page-faq .faq-contact-val {
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink);
  word-break: break-word;
}

/* ---------- 动效退让 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-a {
    animation: none;
  }

  .page-faq .faq-item::before,
  .page-faq .faq-q-text,
  .page-faq .faq-q-mark::before,
  .page-faq .faq-q-mark::after,
  .page-faq .faq-jump,
  .page-faq .faq-jump-target,
  .page-faq .faq-rail-link {
    transition: none;
  }
}