.page-faq {
  --faq-ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* 面包屑 */
.page-faq .faq-crumbs {
  padding-top: clamp(20px, 4vw, 36px);
}
.page-faq .faq-crumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--yb-font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--yb-muted);
}
.page-faq .faq-crumbs__item + .faq-crumbs__item::before {
  content: "/";
  margin-right: 10px;
  color: var(--yb-line);
}
.page-faq .faq-crumbs__item[aria-current="page"] {
  color: var(--yb-cyan);
}
.page-faq .faq-crumbs__link {
  color: var(--yb-muted);
  text-decoration: none;
  transition: color 0.25s var(--faq-ease);
}
.page-faq .faq-crumbs__link:hover,
.page-faq .faq-crumbs__link:focus-visible {
  color: var(--yb-cyan);
}

/* 首屏 */
.page-faq .faq-hero {
  padding-top: clamp(26px, 5vw, 54px);
}
.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(30px, 5vw, 52px);
}
.page-faq .faq-hero__title {
  margin: 18px 0 0;
  font-size: clamp(38px, 9vw, 84px);
  line-height: 1.02;
  letter-spacing: -0.01em;
}
.page-faq .faq-hero__lede {
  margin: 22px 0 0;
  max-width: 34em;
}
.page-faq .faq-hero__badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}
.page-faq .faq-frame {
  display: block;
  overflow: hidden;
}
.page-faq .faq-hero__visual img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: calc(var(--yb-radius) - 6px);
  border: 1px solid var(--yb-line);
  background: var(--yb-steel);
}

/* 主体双栏 */
.page-faq .faq-body {
  padding-top: clamp(44px, 7vw, 84px);
}
.page-faq .faq-shell {
  display: grid;
  gap: clamp(28px, 4vw, 44px);
}

/* 目录 */
.page-faq .faq-toc__label {
  margin: 0 0 14px;
}
.page-faq .faq-toc__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}
.page-faq .faq-toc__list::-webkit-scrollbar {
  display: none;
}
.page-faq .faq-toc__item {
  flex: 0 0 auto;
}
.page-faq .faq-toc__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border: 1px solid var(--yb-line);
  border-radius: var(--yb-pill);
  background: rgba(13, 21, 38, 0.75);
  color: var(--yb-body);
  font-size: 14px;
  line-height: 1;
  white-space: nowrap;
  text-decoration: none;
  transition: color 0.25s var(--faq-ease), border-color 0.25s var(--faq-ease),
    background 0.25s var(--faq-ease);
}
.page-faq .faq-toc__num {
  font-family: var(--yb-font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--yb-muted);
  transition: color 0.25s var(--faq-ease);
}
.page-faq .faq-toc__link:hover,
.page-faq .faq-toc__link:focus-visible {
  color: var(--yb-text);
  border-color: rgba(53, 240, 208, 0.5);
}

/* 章节 */
.page-faq .faq-flow {
  min-width: 0;
}
.page-faq .faq-block {
  padding-bottom: clamp(44px, 6vw, 76px);
  scroll-margin-top: calc(var(--yb-header-h) + 20px);
}
.page-faq .faq-block:last-child {
  padding-bottom: 0;
}
.page-faq .faq-block__head {
  margin-bottom: 22px;
}
.page-faq .faq-block__title {
  margin: 14px 0 0;
  font-size: clamp(26px, 4.6vw, 44px);
  line-height: 1.12;
}
.page-faq .faq-block__note {
  margin: 12px 0 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--yb-muted);
}

/* 问题卡片 */
.page-faq .faq-list {
  display: grid;
  gap: 12px;
}
.page-faq .faq-item {
  border: 1px solid var(--yb-line);
  border-radius: var(--yb-radius);
  background: linear-gradient(180deg, rgba(22, 33, 61, 0.55) 0%, rgba(13, 21, 38, 0.9) 100%);
  overflow: hidden;
  transition: border-color 0.3s var(--faq-ease), transform 0.3s var(--faq-ease);
}
.page-faq .faq-item:hover {
  border-color: rgba(53, 240, 208, 0.32);
  transform: translateY(-2px);
}
.page-faq .faq-item[open] {
  border-color: rgba(53, 240, 208, 0.48);
}
.page-faq .faq-item__head {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 20px;
  cursor: pointer;
  list-style: none;
}
.page-faq .faq-item__head::-webkit-details-marker {
  display: none;
}
.page-faq .faq-item__head:focus-visible {
  outline: 2px solid var(--yb-cyan);
  outline-offset: -3px;
}
.page-faq .faq-item__q {
  flex: 1 1 auto;
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 0;
  font-size: clamp(15px, 2.2vw, 17px);
  font-weight: 600;
  line-height: 1.55;
  color: var(--yb-text);
}
.page-faq .faq-item__num {
  flex: 0 0 auto;
  font-family: var(--yb-font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.1em;
  color: var(--yb-cyan);
}
.page-faq .faq-item__chev {
  flex: 0 0 auto;
  width: 10px;
  height: 10px;
  margin-top: -5px;
  border-right: 2px solid var(--yb-muted);
  border-bottom: 2px solid var(--yb-muted);
  transform: rotate(45deg);
  transition: transform 0.32s var(--faq-ease), border-color 0.32s var(--faq-ease);
}
.page-faq .faq-item[open] .faq-item__chev {
  margin-top: 4px;
  transform: rotate(-135deg);
  border-color: var(--yb-cyan);
}
.page-faq .faq-item__body {
  padding: 0 20px 22px 46px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--yb-body);
  animation: faq-answer-in 0.4s var(--faq-ease) both;
}
.page-faq .faq-item__body p {
  margin: 0;
  max-width: 40em;
}
@keyframes faq-answer-in {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
.page-faq .faq-key {
  font-family: var(--yb-font-mono);
  font-weight: 500;
  font-size: 0.95em;
  letter-spacing: 0.02em;
  color: var(--yb-cyan);
  background: rgba(53, 240, 208, 0.09);
  border-radius: 6px;
  padding: 1px 7px;
}
.page-faq .faq-inline-link {
  color: var(--yb-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 240, 208, 0.45);
  transition: border-color 0.25s var(--faq-ease);
}
.page-faq .faq-inline-link:hover,
.page-faq .faq-inline-link:focus-visible {
  border-color: var(--yb-cyan);
}

/* 会员权益插图 */
.page-faq .faq-figure {
  margin: 0 0 24px;
  max-width: 340px;
}
.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--yb-radius);
  border: 1px solid var(--yb-line);
  background: var(--yb-panel);
}
.page-faq .faq-figure figcaption {
  margin-top: 10px;
  font-family: var(--yb-font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--yb-muted);
}

/* 人工支持 */
.page-faq .faq-help {
  padding: clamp(24px, 4vw, 44px);
  border: 1px solid var(--yb-line);
  border-radius: var(--yb-radius-lg);
  background:
    radial-gradient(120% 140% at 0% 0%, rgba(122, 92, 255, 0.24) 0%, rgba(6, 10, 20, 0) 58%),
    var(--yb-panel);
}
.page-faq .faq-help__lede {
  margin: 0;
  max-width: 38em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--yb-body);
}
.page-faq .faq-help__channels {
  display: grid;
  gap: 12px;
  margin-top: 24px;
}
.page-faq .faq-help__channel {
  padding: 16px 18px;
  border: 1px solid rgba(43, 58, 99, 0.85);
  border-radius: var(--yb-radius-sm);
  background: rgba(6, 10, 20, 0.6);
}
.page-faq .faq-help__label {
  margin: 0 0 8px;
  font-family: var(--yb-font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--yb-muted);
}
.page-faq .faq-help__value {
  margin: 0;
  font-family: var(--yb-font-mono);
  font-size: 15px;
  line-height: 1.6;
  color: var(--yb-text);
  word-break: break-word;
}
.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

/* 平板与桌面 */
@media (min-width: 760px) {
  .page-faq .faq-help__channels {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-faq .faq-item__head {
    padding: 20px 26px;
  }
  .page-faq .faq-item__body {
    padding: 0 26px 24px 52px;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: end;
    gap: clamp(32px, 5vw, 72px);
  }
  .page-faq .faq-hero__visual img {
    aspect-ratio: 3 / 4;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-shell {
    grid-template-columns: 236px minmax(0, 1fr);
    align-items: start;
    gap: clamp(40px, 5vw, 76px);
  }
  .page-faq .faq-toc {
    position: sticky;
    top: calc(var(--yb-header-h) + 28px);
  }
  .page-faq .faq-toc__list {
    flex-direction: column;
    gap: 4px;
    overflow: visible;
    padding-bottom: 0;
  }
  .page-faq .faq-toc__item {
    flex: 1 1 auto;
  }
  .page-faq .faq-toc__link {
    display: flex;
    width: 100%;
    padding: 11px 0 11px 18px;
    border: none;
    border-radius: 10px;
    background: none;
    color: var(--yb-muted);
    white-space: normal;
  }
  .page-faq .faq-toc__link::before {
    content: "";
    position: absolute;
    left: 0;
    top: 9px;
    bottom: 9px;
    width: 2px;
    border-radius: 2px;
    background: var(--yb-line);
    transition: background 0.28s var(--faq-ease), box-shadow 0.28s var(--faq-ease);
  }
  .page-faq .faq-toc__item {
    position: relative;
  }
  .page-faq .faq-toc__link:hover,
  .page-faq .faq-toc__link:focus-visible {
    color: var(--yb-text);
    border-color: transparent;
  }
  .page-faq .faq-toc__link[aria-current="true"] {
    color: var(--yb-cyan);
  }
  .page-faq .faq-toc__link[aria-current="true"]::before {
    background: var(--yb-cyan);
    box-shadow: var(--yb-glow-cyan);
  }
  .page-faq .faq-toc__link[aria-current="true"] .faq-toc__num {
    color: var(--yb-cyan);
  }
}

@media (min-width: 1280px) {
  .page-faq .faq-figure {
    max-width: 380px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-item__chev,
  .page-faq .faq-toc__link,
  .page-faq .faq-toc__link::before,
  .page-faq .faq-inline-link {
    transition: none;
  }
  .page-faq .faq-item__body {
    animation: none;
  }
  .page-faq .faq-item:hover {
    transform: none;
  }
}