.page-faq {
  --faq-gap: clamp(20px, 2.6vw, 34px);
  --faq-line: #1D3A52;
  background: var(--yb-night);
  color: var(--yb-cream);
  padding-bottom: clamp(48px, 6vw, 88px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(22px, 3.4vw, 40px) 0 clamp(28px, 4vw, 52px);
  background:
    radial-gradient(900px 420px at 82% -8%, rgba(34, 224, 207, .12), transparent 64%),
    radial-gradient(700px 380px at -6% 104%, rgba(255, 107, 44, .10), transparent 66%),
    linear-gradient(180deg, #050C15 0%, #0A1626 100%);
  border-bottom: 1px solid var(--yb-gridline);
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(29, 58, 82, .40) 1px, transparent 1px),
    linear-gradient(90deg, rgba(29, 58, 82, .40) 1px, transparent 1px);
  background-size: 48px 48px;
  -webkit-mask-image: radial-gradient(circle at 72% 26%, #000 0%, transparent 72%);
  mask-image: radial-gradient(circle at 72% 26%, #000 0%, transparent 72%);
  pointer-events: none;
  z-index: 0;
}

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

.page-faq .faq-hero__grid {
  display: grid;
  gap: var(--faq-gap);
  margin-top: clamp(18px, 2.6vw, 30px);
}

.page-faq .faq-hero__lead .yb-eyebrow {
  margin: 0 0 12px;
  font-family: var(--yb-mono);
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--yb-cyan);
}

.page-faq .faq-hero h1 {
  margin: 0 0 16px;
  font-family: var(--yb-display);
  font-weight: 700;
  font-size: clamp(1.95rem, 4.6vw, 3.3rem);
  line-height: 1.14;
  letter-spacing: -0.01em;
  color: var(--yb-cream);
}

.page-faq .faq-hero__intro {
  margin: 0 0 22px;
  max-width: 56ch;
  font-size: clamp(15px, 1.35vw, 16.5px);
  line-height: 1.68;
  color: var(--yb-rock);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 26px;
}

.page-faq .faq-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 26px;
  margin: 0;
  padding-top: 18px;
  border-top: 1px dashed var(--yb-gridline);
}

.page-faq .faq-hero__stats > div {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.page-faq .faq-hero__stats dt {
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--yb-rock);
}

.page-faq .faq-hero__stats dd {
  margin: 0;
  font-size: 17px;
  color: var(--yb-cyan);
}

.page-faq .faq-hero__figure {
  margin: 0;
  min-width: 0;
}

.page-faq .faq-hero__figure .yb-figure__media {
  overflow: hidden;
}

.page-faq .faq-hero__figure .yb-figure__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

/* ---------- 筛选条 ---------- */
.page-faq .faq-filter {
  padding: clamp(20px, 3vw, 32px) 0 0;
}

.page-faq .faq-filter__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--yb-gridline);
}

.page-faq .faq-filter__label {
  font-family: var(--yb-head);
  font-size: 13px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--yb-rock);
}

.page-faq .faq-filter__row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* ---------- 主体布局 ---------- */
.page-faq .faq-body {
  padding-top: clamp(26px, 3.6vw, 44px);
}

.page-faq .faq-body .yb-grid {
  gap: var(--faq-gap);
}

/* ---------- 左侧目录 ---------- */
.page-faq .faq-rail {
  align-self: start;
  min-width: 0;
  padding: 18px 16px;
  background: var(--yb-panel);
  border: 2px solid var(--yb-gridline);
  box-shadow: var(--yb-shadow);
}

.page-faq .faq-rail .yb-rail__title {
  margin: 0 0 12px;
  font-family: var(--yb-head);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .05em;
  color: var(--yb-cream);
}

.page-faq .faq-rail .yb-rail__list {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .yb-rail__link {
  position: relative;
  display: block;
  padding: 9px 12px 9px 14px;
  font-size: 14.5px;
  line-height: 1.4;
  color: var(--yb-rock);
  text-decoration: none;
  border-left: 3px solid transparent;
  transition: color var(--yb-t), border-color var(--yb-t), background var(--yb-t);
}

.page-faq .yb-rail__link:hover,
.page-faq .yb-rail__link:focus-visible {
  color: var(--yb-cream);
  background: rgba(242, 237, 227, .04);
}

.page-faq .yb-rail__link.is-active {
  color: var(--yb-cream);
  border-left-color: var(--yb-orange);
  background: rgba(255, 107, 44, .11);
}

.page-faq .yb-rail__meta {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--yb-gridline);
  font-size: 13px;
  line-height: 1.6;
  color: var(--yb-rock);
}

@media (min-width: 960px) {
  .page-faq .faq-rail {
    position: sticky;
    top: 92px;
  }
}

/* ---------- 答案区 ---------- */
.page-faq .faq-answers {
  display: flex;
  flex-direction: column;
  gap: var(--faq-gap);
  min-width: 0;
}

.page-faq .faq-group {
  min-width: 0;
  padding: clamp(18px, 2.4vw, 28px);
  background: var(--yb-panel);
  border: 2px solid var(--yb-gridline);
  box-shadow: var(--yb-shadow);
  scroll-margin-top: 96px;
}

.page-faq .faq-answers > .faq-group:nth-child(1) { border-top-color: var(--yb-cyan); }
.page-faq .faq-answers > .faq-group:nth-child(2) { border-top-color: var(--yb-orange); }
.page-faq .faq-answers > .faq-group:nth-child(3) { border-top-color: var(--yb-moss); }
.page-faq .faq-answers > .faq-group:nth-child(4) { border-top-color: var(--yb-clay); }
.page-faq .faq-answers > .faq-group:nth-child(5) { border-top-color: var(--yb-cyan); }
.page-faq .faq-answers > .faq-group:nth-child(6) { border-top-color: var(--yb-orange); }

.page-faq .faq-group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 12px;
  padding-bottom: 14px;
  margin-bottom: 4px;
  border-bottom: 1px dashed var(--yb-gridline);
}

.page-faq .faq-group__no {
  font-size: 22px;
  font-weight: 700;
  line-height: 1;
  color: var(--yb-cyan);
}

.page-faq .faq-answers > .faq-group:nth-child(2) .faq-group__no { color: var(--yb-orange); }
.page-faq .faq-answers > .faq-group:nth-child(3) .faq-group__no { color: var(--yb-moss); }
.page-faq .faq-answers > .faq-group:nth-child(4) .faq-group__no { color: var(--yb-clay); }
.page-faq .faq-answers > .faq-group:nth-child(5) .faq-group__no { color: var(--yb-cyan); }
.page-faq .faq-answers > .faq-group:nth-child(6) .faq-group__no { color: var(--yb-orange); }

.page-faq .faq-group__title {
  flex: 1 1 auto;
  margin: 0;
  font-family: var(--yb-head);
  font-size: clamp(1.15rem, 1.9vw, 1.5rem);
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--yb-cream);
}

/* ---------- 单条问答 ---------- */
.page-faq .faq-item {
  border-bottom: 1px solid rgba(29, 58, 82, .72);
}

.page-faq .faq-item:last-child {
  border-bottom: 0;
}

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  padding: 16px 0 10px;
  font-family: var(--yb-head);
  font-size: clamp(1rem, 1.45vw, 1.14rem);
  font-weight: 600;
  line-height: 1.4;
  color: var(--yb-cream);
  cursor: pointer;
  list-style: none;
  transition: color var(--yb-t);
}

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

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

.page-faq .faq-item__mark {
  position: relative;
  flex: 0 0 auto;
  width: 16px;
  height: 16px;
  margin-top: 4px;
  border: 1.5px solid var(--yb-cyan);
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--yb-cyan);
  transform: translate(-50%, -50%);
}

.page-faq .faq-item__mark::before {
  width: 7px;
  height: 1.5px;
}

.page-faq .faq-item__mark::after {
  width: 1.5px;
  height: 7px;
  transition: opacity 180ms ease;
}

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

.page-faq .faq-item__a {
  padding: 0 0 16px;
  font-size: 15px;
  line-height: 1.72;
  color: var(--yb-rock);
}

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

/* ---------- 带配图的分组 ---------- */
.page-faq .faq-group__split {
  display: grid;
  gap: clamp(16px, 2.2vw, 26px);
  min-width: 0;
}

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

.page-faq .faq-group__figure {
  margin: 0;
  min-width: 0;
}

.page-faq .faq-group__figure .yb-figure__media {
  overflow: hidden;
}

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

@media (min-width: 1100px) {
  .page-faq .faq-group__split {
    grid-template-columns: minmax(0, 1.32fr) minmax(0, .88fr);
    align-items: start;
  }
}

/* ---------- 人工支持 ---------- */
.page-faq .faq-group--help {
  background:
    linear-gradient(140deg, rgba(34, 224, 207, .07), rgba(255, 107, 44, .06) 72%),
    var(--yb-panel);
  border-color: var(--yb-cyan);
}

.page-faq .faq-help__text {
  margin: 16px 0 18px;
  font-size: 15px;
  line-height: 1.72;
  color: var(--yb-rock);
}

.page-faq .faq-help__rows {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 18px;
}

.page-faq .faq-help__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  padding: 12px 14px;
  background: rgba(5, 12, 21, .52);
  border: 1px solid var(--yb-gridline);
}

.page-faq .faq-help__k {
  min-width: 70px;
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--yb-rock);
}

.page-faq .faq-help__v {
  font-size: 15px;
  color: var(--yb-cream);
  word-break: break-all;
}

.page-faq .faq-help__row .yb-version__hint {
  font-size: 12.5px;
  color: var(--yb-moss-soft);
}

.page-faq .faq-help__note {
  margin: 0 0 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--yb-rock);
}

/* ---------- 桌面端两栏首屏 ---------- */
@media (min-width: 960px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, .98fr);
    align-items: center;
    gap: clamp(28px, 4vw, 56px);
  }
}

/* ---------- 窄屏收紧 ---------- */
@media (max-width: 640px) {
  .page-faq .faq-hero__stats {
    gap: 12px 20px;
  }

  .page-faq .faq-group__head {
    align-items: center;
  }

  .page-faq .faq-help__row {
    align-items: flex-start;
  }

  .page-faq .faq-help__k {
    min-width: 100%;
  }
}

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