.page-faq {
  --faq-gap: clamp(28px, 4vw, 56px);
  position: relative;
  color: var(--by-text);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(24px, 4vw, 48px) 0 clamp(36px, 6vw, 80px);
  border-bottom: 1px solid var(--by-line);
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  top: 8%;
  right: -90px;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle at center, rgba(255, 46, 139, 0.2), transparent 68%);
  pointer-events: none;
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  margin-top: clamp(20px, 3vw, 36px);
}

.page-faq .faq-hero__kicker {
  margin: 0;
  font-family: var(--by-font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--by-cyan);
}

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  font-size: clamp(40px, 7vw, 88px);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--by-text);
}

.page-faq .faq-hero__title em {
  display: block;
  font-style: normal;
  color: var(--by-ice);
  text-shadow: 0 0 28px rgba(127, 212, 255, 0.28);
}

.page-faq .faq-hero__lede {
  margin: 20px 0 0;
  max-width: 56ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.75;
  color: var(--by-muted);
}

.page-faq .faq-hero__jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero__jump a {
  display: inline-block;
  padding: 7px 12px;
  border: 1px solid var(--by-line);
  background: rgba(30, 44, 72, 0.5);
  color: var(--by-text);
  font-size: 13px;
  text-decoration: none;
  transition: border-color 0.25s var(--by-ease), color 0.25s var(--by-ease), transform 0.25s var(--by-ease);
}

.page-faq .faq-hero__jump a:hover {
  border-color: var(--by-cyan);
  color: var(--by-cyan);
  transform: translateY(-2px);
}

.page-faq .faq-hero__figure {
  position: relative;
  margin: 0;
  border: var(--by-border);
  background: var(--by-surface);
  box-shadow: var(--by-shadow-hard);
}

.page-faq .faq-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 12 / 7;
  object-fit: cover;
}

.page-faq .faq-hero__figure figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--by-line);
  font-family: var(--by-font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--by-muted);
}

/* ---------- 主体双栏 ---------- */
.page-faq .faq-body {
  padding: clamp(40px, 6vw, 88px) 0 clamp(48px, 7vw, 104px);
}

.page-faq .faq-body__grid {
  display: grid;
  gap: var(--faq-gap);
}

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

.page-faq .faq-side {
  order: -1;
  min-width: 0;
}

/* ---------- 分组题头 ---------- */
.page-faq .faq-group {
  --g: var(--by-ice);
  margin-bottom: clamp(36px, 5vw, 60px);
  scroll-margin-top: 88px;
}

.page-faq .faq-group--export { --g: var(--by-cyan); }
.page-faq .faq-group--sort { --g: var(--by-ice); }
.page-faq .faq-group--rule { --g: var(--by-violet); }
.page-faq .faq-group--feedback { --g: var(--by-hot); }
.page-faq .faq-group--venue { --g: var(--by-amber); }
.page-faq .faq-group--more { --g: var(--by-cyan); }

.page-faq .faq-group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  padding: 0 0 12px 14px;
  margin-bottom: 18px;
  border-left: 4px solid var(--g);
  border-bottom: 1px solid var(--by-line);
}

.page-faq .faq-group__num {
  font-family: var(--by-font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--g);
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(20px, 2.6vw, 30px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--by-text);
}

.page-faq .faq-group__tag {
  margin-left: auto;
  padding: 3px 8px;
  border: 1px solid var(--g);
  color: var(--g);
  font-family: var(--by-font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  white-space: nowrap;
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-item {
  border: 3px solid var(--by-line);
  border-left-width: 5px;
  background: var(--by-surface);
  transition: border-color 0.28s var(--by-ease), transform 0.28s var(--by-ease);
}

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

.page-faq .faq-item[open] {
  border-left-color: var(--by-cyan);
  transform: translateY(-2px);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 14px 16px;
  margin: 0;
  cursor: pointer;
  list-style: none;
  font-size: clamp(15px, 1.5vw, 17px);
  font-weight: 700;
  line-height: 1.5;
  color: var(--by-text);
}

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

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

.page-faq .faq-item__idx {
  flex: 0 0 auto;
  min-width: 2.6em;
  padding-top: 3px;
  font-family: var(--by-font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.06em;
  color: var(--by-ice);
}

.page-faq .faq-item:hover .faq-item__idx { color: var(--by-cyan); }

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

.page-faq .faq-item__mark {
  position: relative;
  flex: 0 0 auto;
  width: 14px;
  height: 14px;
  margin: 5px 0 0 auto;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  background: var(--by-cyan);
  transition: transform 0.3s var(--by-ease);
}

.page-faq .faq-item__mark::before { left: 0; top: 6px; width: 14px; height: 2px; }
.page-faq .faq-item__mark::after { left: 6px; top: 0; width: 2px; height: 14px; }
.page-faq .faq-item[open] .faq-item__mark::after { transform: scaleY(0); }

.page-faq .faq-item__a {
  padding: 0 18px 16px;
  border-top: 1px solid var(--by-line);
}

.page-faq .faq-item__a p {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--by-muted);
  overflow-wrap: break-word;
}

.page-faq .faq-item__a a {
  color: var(--by-ice);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-item__a a:hover { color: var(--by-cyan); }

/* ---------- 反馈分组配图 ---------- */
.page-faq .faq-group__media {
  position: relative;
  margin: 0 0 18px;
  border: var(--by-border);
  background: var(--by-surface);
  overflow: hidden;
}

.page-faq .faq-group__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-faq .faq-group__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(127, 212, 255, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(127, 212, 255, 0.07) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}

/* ---------- 还没找到答案 ---------- */
.page-faq .faq-more {
  padding: clamp(20px, 3vw, 32px);
  border: 3px solid var(--by-line);
  border-left: 5px solid var(--by-cyan);
  background: linear-gradient(135deg, rgba(14, 24, 48, 0.95), rgba(6, 10, 18, 0.95));
  box-shadow: var(--by-shadow-hard);
  overflow-wrap: break-word;
}

.page-faq .faq-more__text {
  margin: 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--by-text);
}

.page-faq .faq-more__list {
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-more__list li {
  position: relative;
  margin-top: 10px;
  padding-left: 20px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--by-muted);
}

.page-faq .faq-more__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.68em;
  width: 10px;
  height: 2px;
  background: var(--by-cyan);
}

.page-faq .faq-more__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

/* ---------- 右侧问题索引 ---------- */
.page-faq .faq-index {
  padding: 14px 12px;
  border: 1px solid var(--by-line);
  background: rgba(14, 24, 48, 0.72);
}

.page-faq .faq-index__title {
  margin: 0;
  font-family: var(--by-font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--by-muted);
}

.page-faq .faq-index__list {
  display: flex;
  gap: 6px;
  margin: 10px 0 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

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

.page-faq .faq-index__link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 8px;
  border-left: 2px solid transparent;
  color: var(--by-muted);
  font-size: 13px;
  line-height: 1.3;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.25s var(--by-ease), border-color 0.25s var(--by-ease), background 0.25s var(--by-ease);
}

.page-faq .faq-index__link:hover {
  color: var(--by-text);
  border-left-color: var(--by-ice);
  background: rgba(127, 212, 255, 0.06);
}

.page-faq .faq-index__link.is-visible {
  color: var(--by-cyan);
  border-left-color: var(--by-cyan);
  background: rgba(0, 240, 224, 0.08);
}

.page-faq .faq-index__n {
  flex: 0 0 auto;
  font-family: var(--by-font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--by-ice);
}

/* ---------- 桌面端 ---------- */
@media (min-width: 1000px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-hero::after {
    width: 520px;
    height: 520px;
    right: -140px;
  }

  .page-faq .faq-body__grid {
    grid-template-columns: minmax(0, 1fr) 250px;
    align-items: start;
  }

  .page-faq .faq-side {
    order: 0;
    position: sticky;
    top: 92px;
  }

  .page-faq .faq-index__list {
    display: block;
    overflow: visible;
    padding: 0;
  }

  .page-faq .faq-index__list li + li {
    margin-top: 2px;
  }

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

/* ---------- 减弱动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-item__mark::before,
  .page-faq .faq-item__mark::after,
  .page-faq .faq-hero__jump a,
  .page-faq .faq-index__link {
    transition: none;
  }

  .page-faq .faq-item[open] {
    transform: none;
  }
}