.page-faq {
  --faq-rail-w: 230px;
  --faq-body-gap: clamp(24px, 3.4vw, 48px);
  background: var(--bg);
  color: var(--cream);
  font-family: var(--font-body);
  padding-bottom: clamp(48px, 7vw, 96px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  border-bottom: 1px solid var(--line-soft);
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  top: -40%;
  right: -12%;
  width: 58%;
  height: 170%;
  background: linear-gradient(140deg, rgba(41, 224, 210, 0.13), rgba(41, 224, 210, 0) 62%);
  clip-path: polygon(34% 0, 100% 0, 66% 100%, 0 100%);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 2;
  display: grid;
  gap: clamp(26px, 4vw, 44px);
  padding: clamp(26px, 4.5vw, 52px) 0 clamp(26px, 4vw, 44px);
}

.page-faq .faq-hero__eyebrow {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--cyan);
  text-transform: uppercase;
}

.page-faq .faq-hero__title {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-size: clamp(40px, 8vw, 84px);
  font-weight: 900;
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--cream);
}

.page-faq .faq-hero__intro {
  margin: 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-hero__stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 0;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-faq .faq-hero__stat {
  background: var(--panel);
  padding: 16px 18px;
}

.page-faq .faq-hero__stat dt {
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--muted);
  margin-bottom: 6px;
}

.page-faq .faq-hero__stat dd {
  margin: 0;
  font-size: 15px;
  color: var(--cream);
}

.page-faq .faq-hero__stat .num {
  font-family: var(--font-num);
  font-size: 30px;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--gold);
  margin-right: 4px;
}

.page-faq .faq-hero__media {
  position: relative;
  margin: 0;
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  height: clamp(180px, 30vw, 330px);
  object-fit: cover;
  filter: saturate(0.68) contrast(1.06);
}

.page-faq .faq-hero__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 10px clamp(16px, 3vw, 32px);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--cream);
  background: linear-gradient(180deg, rgba(6, 26, 23, 0) 0%, rgba(6, 26, 23, 0.88) 78%);
}

/* ---------- 主体分栏 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: var(--faq-body-gap);
  padding-top: clamp(32px, 5vw, 64px);
}

.page-faq .faq-rail__label {
  margin: 0 0 12px;
  font-size: 11.5px;
  letter-spacing: 0.24em;
  color: var(--muted);
  text-transform: uppercase;
}

.page-faq .faq-rail__nav {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding-bottom: 8px;
  scrollbar-width: thin;
}

.page-faq .faq-rail__link {
  display: block;
  flex: 0 0 auto;
  padding: 9px 13px;
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--muted);
  text-decoration: none;
  border-left: 2px solid var(--line-soft);
  white-space: nowrap;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background: var(--glass);
}

/* ---------- 筛选条 ---------- */
.page-faq .faq-filter {
  margin-bottom: clamp(24px, 3vw, 36px);
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-group {
  margin-bottom: clamp(40px, 5.4vw, 68px);
  scroll-margin-top: 130px;
}

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

.page-faq .faq-group[hidden] {
  display: none;
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--line);
  margin-bottom: 6px;
}

.page-faq .faq-group__index {
  font-size: clamp(24px, 3vw, 32px);
  color: var(--gold);
  line-height: 1;
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(20px, 2.6vw, 28px);
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--cream);
}

/* ---------- 折叠条目 ---------- */
.page-faq .faq-item {
  border-bottom: 1px solid var(--line-soft);
  transition: background 0.24s var(--ease), box-shadow 0.24s var(--ease);
}

.page-faq .faq-item:hover {
  background: rgba(41, 224, 210, 0.03);
}

.page-faq .faq-item[open] {
  background: var(--glass);
  box-shadow: inset 2px 0 0 var(--cyan);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  padding: 18px 14px;
  cursor: pointer;
  list-style: none;
  font-size: 16.5px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--cream);
}

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

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

.page-faq .faq-item__mark {
  position: relative;
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  margin-top: 5px;
}

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

.page-faq .faq-item__mark::before {
  left: 0;
  top: 8px;
  width: 18px;
  height: 2px;
}

.page-faq .faq-item__mark::after {
  left: 8px;
  top: 0;
  width: 2px;
  height: 18px;
}

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

.page-faq .faq-item__a {
  padding: 0 14px 22px;
}

.page-faq .faq-item__a p {
  margin: 0 0 12px;
  max-width: 68ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--muted);
}

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

.page-faq .faq-item__a strong {
  color: var(--cream);
  font-weight: 600;
}

/* ---------- 图解 ---------- */
.page-faq .faq-diagram {
  display: block;
  width: min(100%, 380px);
  height: auto;
  margin: 18px 0 4px;
}

.page-faq .faq-figure {
  margin: 26px 0 0;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: var(--panel);
  overflow: hidden;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  filter: saturate(0.72) contrast(1.04);
}

.page-faq .faq-figure__cap {
  padding: 12px 16px;
  border-top: 1px solid var(--line-soft);
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 收束条 ---------- */
.page-faq .faq-outro {
  margin-top: clamp(44px, 6vw, 80px);
  padding-top: clamp(28px, 4vw, 48px);
  border-top: 2px solid var(--line);
}

.page-faq .faq-outro__inner {
  display: grid;
  gap: 24px;
}

.page-faq .faq-outro__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(24px, 3.2vw, 34px);
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--cream);
}

.page-faq .faq-outro__text p {
  margin: 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--muted);
}

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

/* ---------- 右下角常驻入口 ---------- */
.page-faq .faq-pin {
  position: fixed;
  right: clamp(14px, 2.5vw, 28px);
  bottom: clamp(14px, 2.5vw, 28px);
  z-index: 6;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: 999px;
  border: 1px solid var(--cyan-soft);
  background: rgba(12, 42, 36, 0.94);
  color: var(--cream);
  font-size: 13px;
  text-decoration: none;
  backdrop-filter: blur(8px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.42);
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

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

.page-faq .faq-pin__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--flame);
  flex: 0 0 auto;
}

/* ---------- 桌面布局 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-hero__stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-outro__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    gap: 32px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: end;
  }

  .page-faq .faq-body {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 118px;
  }

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

  .page-faq .faq-rail__link {
    white-space: normal;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-hero__intro {
    font-size: 17px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-item__mark::before,
  .page-faq .faq-item__mark::after,
  .page-faq .faq-rail__link,
  .page-faq .faq-pin {
    transition: none;
  }
}