.page-faq {
  --faq-ink: #0B1230;
  --faq-ink-soft: #4A5478;
  --faq-line-paper: rgba(11, 18, 48, 0.16);
  --faq-line-paper-soft: rgba(11, 18, 48, 0.08);
  --faq-no-w: clamp(44px, 4.4vw, 64px);
  --faq-gap: clamp(12px, 1.8vw, 22px);
  display: block;
  background: var(--c-void);
  color: var(--c-snow);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(20px, 3.4vw, 44px) 0 0;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  left: -14%;
  top: -34%;
  width: 68%;
  height: 130%;
  background: linear-gradient(115deg, rgba(123, 77, 255, 0.26), rgba(255, 122, 47, 0.07) 52%, transparent 74%);
  transform: skewX(-11deg);
  pointer-events: none;
  z-index: -1;
}

.page-faq .faq-hero-deco {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(123, 77, 255, 0.14) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(233, 242, 255, 0.05) 1px, transparent 1px);
  background-size: 88px 88px;
  -webkit-mask-image: radial-gradient(120% 92% at 16% 0%, #000 0%, transparent 72%);
  mask-image: radial-gradient(120% 92% at 16% 0%, #000 0%, transparent 72%);
  pointer-events: none;
  z-index: -1;
}

.page-faq .faq-hero-inner {
  display: grid;
  gap: clamp(14px, 2.2vw, 24px);
  max-width: 940px;
}

.page-faq .faq-hero h1 {
  margin: 0;
  font-size: clamp(36px, 6.2vw, 82px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  font-weight: 900;
  color: var(--c-snow);
  text-wrap: balance;
}

.page-faq .faq-em {
  color: var(--c-signal);
}

.page-faq .faq-lede {
  margin: 0;
  max-width: 64ch;
  font-size: clamp(15.5px, 1.35vw, 18px);
  line-height: 1.9;
  color: rgba(233, 242, 255, 0.78);
}

.page-faq .faq-quick {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(10px, 1.8vw, 22px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .faq-quick li {
  display: grid;
  gap: 7px;
  align-content: start;
  padding: clamp(14px, 1.8vw, 22px);
  background: rgba(20, 28, 66, 0.78);
}

.page-faq .faq-quick-k {
  font-family: var(--font-mono);
  font-size: clamp(18px, 2.1vw, 26px);
  letter-spacing: 0.02em;
  line-height: 1.1;
  color: var(--c-snow);
}

.page-faq .faq-quick-v {
  font-size: 13px;
  line-height: 1.65;
  color: var(--c-fog);
}

.page-faq .faq-hero-media {
  margin: clamp(30px, 4.6vw, 62px) 0 0;
  position: relative;
}

.page-faq .faq-hero-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1440 / 560;
  object-fit: cover;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 86%);
}

/* ---------- 浅色问答主体 ---------- */

.page-faq .faq-band {
  position: relative;
  background: var(--c-paper);
  color: var(--faq-ink);
  padding: clamp(44px, 6.6vw, 94px) 0 clamp(52px, 7.6vw, 108px);
}

.page-faq .faq-band::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(11, 18, 48, 0.045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(11, 18, 48, 0.045) 1px, transparent 1px);
  background-size: 74px 74px;
  pointer-events: none;
}

.page-faq .faq-layout {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(190px, 236px) minmax(0, 1fr);
  gap: clamp(28px, 5vw, 78px);
  align-items: start;
}

/* 左侧索引 */

.page-faq .faq-index {
  position: sticky;
  top: clamp(84px, 13vh, 130px);
  align-self: start;
}

.page-faq .faq-index-title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--faq-ink-soft);
}

.page-faq .faq-index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 2px solid var(--faq-ink);
}

.page-faq .faq-index-link {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 8px;
  align-items: baseline;
  padding: 12px 4px;
  border-bottom: 1px solid var(--faq-line-paper-soft);
  color: var(--faq-ink);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.5;
  transition: color 0.24s var(--ease), background-color 0.24s var(--ease), padding-left 0.24s var(--ease);
}

.page-faq .faq-index-link:hover {
  color: var(--c-violet);
  background: rgba(123, 77, 255, 0.06);
  padding-left: 10px;
}

.page-faq .faq-index-link:focus-visible {
  outline: 2px solid var(--c-violet);
  outline-offset: -2px;
  background: rgba(123, 77, 255, 0.08);
}

.page-faq .faq-index-no {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--c-violet);
}

.page-faq .faq-index-note {
  margin: 22px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--faq-line-paper);
  font-size: 13px;
  line-height: 1.8;
  color: var(--faq-ink-soft);
}

.page-faq .faq-index-note a {
  color: var(--c-violet);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* 右侧分组 */

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

.page-faq .faq-group {
  scroll-margin-top: clamp(96px, 14vh, 140px);
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(48px, 6vw, 88px);
}

.page-faq .faq-group-head {
  display: grid;
  gap: 10px;
  padding-bottom: clamp(14px, 2vw, 22px);
  border-bottom: 2px solid var(--faq-ink);
  margin-bottom: clamp(4px, 1vw, 10px);
}

.page-faq .faq-group-no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--c-violet);
}

.page-faq .faq-group-title {
  margin: 0;
  font-size: clamp(22px, 2.8vw, 34px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  font-weight: 900;
  color: var(--faq-ink);
}

.page-faq .faq-group-lede {
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.82;
  color: var(--faq-ink-soft);
}

.page-faq .faq-list {
  margin: 0;
}

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

.page-faq .faq-q {
  display: grid;
  grid-template-columns: var(--faq-no-w) minmax(0, 1fr) 20px;
  gap: var(--faq-gap);
  align-items: start;
  padding: clamp(16px, 2.2vw, 24px) 4px;
  cursor: pointer;
  list-style: none;
  transition: background-color 0.26s var(--ease), padding-left 0.26s var(--ease);
}

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

.page-faq .faq-q:hover {
  background: rgba(123, 77, 255, 0.055);
  padding-left: 12px;
}

.page-faq .faq-q:focus-visible {
  outline: 2px solid var(--c-violet);
  outline-offset: -3px;
}

.page-faq .faq-no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  line-height: 1.9;
  color: var(--c-signal);
}

.page-faq .faq-text {
  font-size: clamp(15px, 1.45vw, 17.5px);
  line-height: 1.62;
  font-weight: 600;
  color: var(--faq-ink);
  transition: color 0.24s var(--ease);
}

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

.page-faq .faq-mark {
  position: relative;
  width: 16px;
  height: 16px;
  margin-top: 5px;
  justify-self: end;
}

.page-faq .faq-mark::before,
.page-faq .faq-mark::after {
  content: "";
  position: absolute;
  background: var(--faq-ink-soft);
  transition: transform 0.3s var(--ease), background-color 0.26s var(--ease);
}

.page-faq .faq-mark::before {
  left: 0;
  top: 7px;
  width: 16px;
  height: 1.5px;
}

.page-faq .faq-mark::after {
  left: 7.25px;
  top: 0;
  width: 1.5px;
  height: 16px;
}

.page-faq .faq-q:hover .faq-mark::before,
.page-faq .faq-q:hover .faq-mark::after {
  background: var(--c-violet);
}

.page-faq .faq-item[open] .faq-mark::before {
  background: var(--c-violet);
}

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

.page-faq .faq-a {
  padding: 0 4px clamp(20px, 2.6vw, 28px) calc(var(--faq-no-w) + var(--faq-gap) + 4px);
}

.page-faq .faq-a p {
  margin: 0;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.92;
  color: var(--faq-ink-soft);
}

.page-faq .faq-a a {
  color: var(--c-violet);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-item[open] .faq-a {
  animation: faq-open-in 0.32s var(--ease);
}

@keyframes faq-open-in {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 座位视角图 */

.page-faq .faq-figure {
  margin: clamp(20px, 3vw, 32px) 0 clamp(8px, 1.4vw, 16px);
  display: grid;
  gap: 10px;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1000 / 620;
  object-fit: cover;
  border: 1px solid var(--faq-line-paper);
}

.page-faq .faq-figure figcaption {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.02em;
  line-height: 1.7;
  color: var(--faq-ink-soft);
}

/* ---------- 收束条 ---------- */

.page-faq .faq-foot {
  background: var(--c-hull);
  border-top: 1px solid var(--line);
  padding: clamp(40px, 6vw, 72px) 0;
}

.page-faq .faq-foot-inner {
  display: grid;
  gap: clamp(22px, 3.4vw, 44px);
  align-items: center;
}

.page-faq .faq-foot-copy {
  display: grid;
  gap: 8px;
}

.page-faq .faq-foot-eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-signal);
}

.page-faq .faq-foot-text {
  margin: 0;
  max-width: 46ch;
  font-size: clamp(16px, 1.6vw, 20px);
  line-height: 1.7;
  color: var(--c-snow);
}

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

@media (min-width: 780px) {
  .page-faq .faq-foot-inner {
    grid-template-columns: minmax(0, 1fr) auto;
  }
}

/* ---------- 响应式 ---------- */

@media (max-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: clamp(22px, 4vw, 34px);
  }

  .page-faq .faq-index {
    position: static;
  }

  .page-faq .faq-index-list {
    display: flex;
    flex-wrap: nowrap;
    gap: 8px;
    overflow-x: auto;
    border-top: 0;
    padding-bottom: 8px;
    -webkit-overflow-scrolling: touch;
  }

  .page-faq .faq-index-list li {
    flex: 0 0 auto;
  }

  .page-faq .faq-index-link {
    grid-template-columns: auto auto;
    gap: 6px;
    align-items: center;
    padding: 8px 12px;
    border: 1px solid var(--faq-line-paper);
    white-space: nowrap;
    font-size: 13px;
  }

  .page-faq .faq-index-link:hover {
    padding-left: 12px;
  }

  .page-faq .faq-index-note {
    margin-top: 14px;
    padding-top: 0;
    border-top: 0;
  }
}

@media (max-width: 620px) {
  .page-faq {
    --faq-no-w: 40px;
    --faq-gap: 12px;
  }

  .page-faq .faq-quick {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-faq .faq-a {
    padding-left: 4px;
  }

  .page-faq .faq-hero-media img {
    clip-path: none;
  }

  .page-faq .faq-q:hover {
    padding-left: 4px;
  }

  .page-faq .faq-foot-actions .btn {
    flex: 1 1 auto;
    text-align: center;
  }
}

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

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