.page-faq {
  --faq-accent: var(--ice);
  --faq-nav-w: 252px;
  --faq-pad: 20px;
  display: block;
  padding-bottom: 80px;
}

/* ---------- 面包屑 ---------- */
.page-faq .crumb {
  padding-top: 20px;
}

/* ---------- 页头 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: 28px 0 0;
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -80px;
  right: -14%;
  width: min(760px, 82vw);
  height: 440px;
  background:
    linear-gradient(135deg, rgba(79, 195, 247, 0.24), rgba(124, 255, 203, 0.11) 52%, rgba(11, 30, 51, 0) 76%);
  clip-path: polygon(14% 0, 100% 0, 86% 100%, 0 78%);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  max-width: 22ch;
  font-size: clamp(30px, 6.4vw, 62px);
  line-height: 1.16;
}

.page-faq .faq-hero__lead {
  margin: 18px 0 0;
  max-width: 60ch;
  font-size: 16.5px;
  line-height: 1.88;
  color: rgba(244, 250, 255, 0.8);
}

.page-faq .faq-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero__facts li {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 14px;
  font-size: 13px;
  color: rgba(244, 250, 255, 0.86);
  background: rgba(6, 18, 31, 0.6);
  border: 1px solid rgba(227, 242, 253, 0.16);
  border-radius: 999px;
}

.page-faq .faq-hero__facts .mono {
  font-size: 13px;
  color: var(--aurora);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 26px 0 0;
}

.page-faq .faq-hero__media {
  position: relative;
  z-index: 1;
  margin: 32px 0 0;
}

.page-faq .faq-hero__media .media {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid rgba(227, 242, 253, 0.14);
}

.page-faq .faq-hero__media .media--16x9 {
  aspect-ratio: 8 / 3;
}

/* ---------- 窄栏 + 宽栏 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  margin-top: 44px;
}

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

.page-faq .faq-nav__label {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-faq .faq-nav__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 2px 8px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-nav__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 14px;
  font-size: 14px;
  white-space: nowrap;
  text-decoration: none;
  color: rgba(244, 250, 255, 0.82);
  border: 1px solid rgba(227, 242, 253, 0.18);
  border-radius: 999px;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease), background-color 0.25s var(--ease);
}

.page-faq .faq-nav__link .mono {
  font-size: 11px;
  color: var(--mist);
}

.page-faq .faq-nav__link:hover,
.page-faq .faq-nav__link:focus-visible {
  color: var(--snow);
  border-color: rgba(79, 195, 247, 0.7);
  background: rgba(79, 195, 247, 0.12);
}

.page-faq .faq-nav__note {
  margin-top: 16px;
  padding: 16px;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(244, 250, 255, 0.72);
  background: rgba(6, 18, 31, 0.62);
  border: 1px solid rgba(227, 242, 253, 0.12);
  border-radius: var(--radius);
}

.page-faq .faq-nav__line {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin: 12px 0 0;
}

.page-faq .faq-nav__line .mono {
  color: var(--ice);
  font-size: 15px;
}

/* ---------- 问题分组 ---------- */
.page-faq .faq-flow {
  min-width: 0;
}

.page-faq .faq-group {
  scroll-margin-top: calc(var(--topbar-h) + 24px);
}

.page-faq .faq-group + .faq-group {
  margin-top: 52px;
  padding-top: 40px;
  border-top: 1px solid rgba(227, 242, 253, 0.1);
}

.page-faq .faq-group--ice { --faq-accent: var(--ice); }
.page-faq .faq-group--aurora { --faq-accent: var(--aurora); }
.page-faq .faq-group--neon { --faq-accent: var(--neon); }
.page-faq .faq-group--ember { --faq-accent: var(--ember); }

.page-faq .faq-group__head {
  max-width: 62ch;
}

.page-faq .faq-group__head .eyebrow {
  color: var(--faq-accent);
}

.page-faq .faq-group__title {
  margin: 10px 0 0;
  font-size: clamp(23px, 4.4vw, 36px);
  font-weight: 800;
  line-height: 1.26;
  letter-spacing: -0.02em;
  color: var(--snow);
}

.page-faq .faq-group__lead {
  margin: 12px 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(244, 250, 255, 0.72);
}

.page-faq .faq-group__list {
  display: grid;
  gap: 12px;
  margin-top: 22px;
}

/* ---------- 配图 ---------- */
.page-faq .faq-figure {
  margin: 24px 0 0;
  max-width: 420px;
}

.page-faq .faq-figure .media {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid rgba(227, 242, 253, 0.14);
}

.page-faq .faq-figure .media__caption {
  margin-top: 10px;
  font-size: 13px;
  color: var(--mist);
}

/* ---------- 问答折叠 ---------- */
.page-faq .qa {
  position: relative;
  background: linear-gradient(180deg, rgba(15, 42, 68, 0.94), rgba(11, 30, 51, 0.94));
  border-left: 3px solid rgba(227, 242, 253, 0.16);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
  transition: border-color 0.3s var(--ease);
}

.page-faq .qa[open] {
  border-left-color: var(--faq-accent);
}

.page-faq .qa__head {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .qa__no {
  flex: 0 0 auto;
  padding-top: 5px;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-faq .qa[open] .qa__no {
  color: var(--faq-accent);
}

.page-faq .qa__q {
  flex: 1 1 auto;
  margin: 0;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.62;
  color: var(--snow);
}

.page-faq .qa__mark {
  position: relative;
  flex: 0 0 16px;
  width: 16px;
  height: 16px;
  margin-top: 6px;
}

.page-faq .qa__mark::before,
.page-faq .qa__mark::after {
  content: "";
  position: absolute;
  background: var(--ice);
  border-radius: 2px;
  transition: transform 0.28s var(--ease), background-color 0.28s var(--ease);
}

.page-faq .qa__mark::before {
  left: 0;
  top: 7px;
  width: 16px;
  height: 2px;
}

.page-faq .qa__mark::after {
  left: 7px;
  top: 0;
  width: 2px;
  height: 16px;
}

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

.page-faq .qa[open] .qa__mark::before {
  background: var(--faq-accent);
}

.page-faq .qa__body {
  padding: 0 18px 20px;
  font-size: 15.5px;
  line-height: 1.86;
  color: rgba(244, 250, 255, 0.8);
}

.page-faq .qa__body p {
  margin: 0 0 10px;
}

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

/* ---------- 联系块 ---------- */
.page-faq .faq-help {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
  margin-top: 24px;
  padding: 22px;
  background: linear-gradient(140deg, rgba(18, 58, 92, 0.9), rgba(6, 18, 31, 0.92));
  border: 1px solid rgba(124, 255, 203, 0.22);
  border-radius: var(--radius);
}

.page-faq .faq-help__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-faq .faq-help__list li {
  display: flex;
  gap: 12px;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(244, 250, 255, 0.84);
}

.page-faq .faq-help__list .mono {
  flex: 0 0 auto;
  padding-top: 4px;
  font-size: 11px;
  color: var(--aurora);
}

.page-faq .faq-help__card {
  padding: 18px;
  background: rgba(6, 18, 31, 0.6);
  border: 1px solid rgba(227, 242, 253, 0.14);
  border-radius: var(--radius);
}

.page-faq .faq-help__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  margin: 14px 0 0;
}

.page-faq .faq-help__key {
  flex: 0 0 72px;
  font-size: 13px;
  color: var(--mist);
}

.page-faq .faq-help__val {
  font-size: 14px;
  color: var(--snow);
  word-break: break-all;
}

.page-faq .faq-help__note {
  margin: 16px 0 0;
  padding-top: 14px;
  font-size: 13.5px;
  line-height: 1.8;
  color: rgba(244, 250, 255, 0.66);
  border-top: 1px solid rgba(227, 242, 253, 0.12);
}

/* ---------- 相关入口 ---------- */
.page-faq .faq-links {
  margin-top: 40px;
  padding-top: 28px;
  border-top: 1px solid rgba(227, 242, 253, 0.1);
}

.page-faq .faq-links__list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-links__list a {
  display: block;
  padding: 14px 16px;
  font-size: 14.5px;
  line-height: 1.6;
  text-decoration: none;
  color: rgba(244, 250, 255, 0.84);
  background: rgba(15, 42, 68, 0.7);
  border: 1px solid rgba(227, 242, 253, 0.12);
  border-radius: 12px;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease), background-color 0.25s var(--ease);
}

.page-faq .faq-links__list a:hover,
.page-faq .faq-links__list a:focus-visible {
  color: var(--snow);
  border-color: rgba(79, 195, 247, 0.6);
  background: rgba(18, 58, 92, 0.9);
}

/* ---------- 平板 ---------- */
@media (min-width: 768px) {
  .page-faq {
    --faq-pad: 32px;
  }

  .page-faq .qa__head {
    gap: 16px;
    padding: 18px 24px;
  }

  .page-faq .qa__q {
    font-size: 17px;
  }

  .page-faq .qa__body {
    padding: 0 24px 22px 58px;
  }

  .page-faq .faq-help {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    gap: 28px;
    padding: 26px;
  }

  .page-faq .faq-links__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 桌面：窄栏常驻 ---------- */
@media (min-width: 1024px) {
  .page-faq {
    padding-bottom: 110px;
  }

  .page-faq .faq-layout {
    grid-template-columns: var(--faq-nav-w) minmax(0, 1fr);
    gap: 56px;
    align-items: start;
    margin-top: 56px;
  }

  .page-faq .faq-nav {
    position: sticky;
    top: calc(var(--topbar-h) + 28px);
    padding: 20px 18px;
    background: rgba(6, 18, 31, 0.76);
    border: 1px solid rgba(227, 242, 253, 0.12);
    border-radius: var(--radius);
    backdrop-filter: blur(12px);
  }

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

  .page-faq .faq-nav__link {
    padding: 9px 10px;
    white-space: normal;
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0;
  }

  .page-faq .faq-nav__link:hover,
  .page-faq .faq-nav__link:focus-visible {
    background: rgba(79, 195, 247, 0.08);
    border-left-color: var(--ice);
  }

  .page-faq .faq-nav__note {
    margin-top: 20px;
    background: rgba(11, 30, 51, 0.6);
  }

  .page-faq .faq-group__lead {
    font-size: 16.5px;
  }

  .page-faq .faq-links__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .qa__mark::before,
  .page-faq .qa__mark::after,
  .page-faq .faq-nav__link,
  .page-faq .faq-links__list a {
    transition: none;
  }

  .page-faq .faq-hero::before {
    display: none;
  }
}