/* ============================================================
   帮助中心 · page-faq
   ============================================================ */

.page-faq {
  --faq-rule: rgba(242, 246, 241, 0.13);
  --faq-rule-soft: rgba(242, 246, 241, 0.07);
  --faq-tint: rgba(216, 255, 62, 0.045);
  background-color: var(--ink);
  color: var(--paper);
}

/* ---------- 面包屑 ---------- */

.page-faq .faq-crumb {
  padding-top: clamp(18px, 3vw, 30px);
}

.page-faq .faq-crumb .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-faq .faq-crumb a.breadcrumb__item {
  color: var(--mist);
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-faq .faq-crumb a.breadcrumb__item:hover,
.page-faq .faq-crumb a.breadcrumb__item:focus-visible {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

.page-faq .faq-crumb span.breadcrumb__item {
  color: var(--paper);
}

.page-faq .faq-crumb .breadcrumb__sep {
  color: var(--mist);
  opacity: 0.6;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(22px, 3.6vw, 40px) 0 clamp(44px, 6vw, 78px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  top: -20%;
  right: -8%;
  width: 60%;
  height: 140%;
  background-color: var(--indigo);
  opacity: 0.62;
  clip-path: polygon(28% 0, 100% 0, 100% 100%, 0 100%);
}

.page-faq .faq-hero__inner {
  display: grid;
  gap: 30px;
  align-items: center;
}

.page-faq .faq-hero__kicker {
  margin: 0 0 14px;
  font-size: 11.5px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--lime);
}

.page-faq .faq-hero__title {
  margin: 0;
  font-size: clamp(34px, 7vw, 72px);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-faq .faq-hero__lead {
  margin: 20px 0 0;
  max-width: 42ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: rgba(242, 246, 241, 0.78);
}

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

.page-faq .faq-hero__chips li {
  padding: 6px 13px;
  border: 1px solid var(--line-strong);
  border-radius: var(--cap);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-faq .faq-hero__media {
  margin: 0;
  border: 2px solid var(--line-strong);
  box-shadow: var(--shadow-hard);
  background-color: var(--night);
  overflow: hidden;
}

.page-faq .faq-hero__media .media__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

/* ---------- 快捷入口 ---------- */

.page-faq .faq-shortcuts {
  position: relative;
  background-color: var(--indigo);
  color: var(--paper);
  padding: clamp(56px, 7.5vw, 96px) 0 clamp(46px, 6vw, 78px);
  clip-path: polygon(0 clamp(14px, 2.4vw, 32px), 100% 0, 100% 100%, 0 100%);
}

.page-faq .faq-shortcuts__inner {
  display: grid;
  gap: 28px;
  align-items: center;
}

.page-faq .faq-shortcuts__media {
  margin: 0;
  border: 2px solid rgba(242, 246, 241, 0.34);
  background-color: rgba(6, 19, 28, 0.46);
  overflow: hidden;
}

.page-faq .faq-shortcuts__media .media__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.page-faq .faq-shortcuts__title {
  margin: 0;
  font-size: clamp(24px, 3.6vw, 36px);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.page-faq .faq-shortcuts__lead {
  margin: 12px 0 0;
  max-width: 40ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(242, 246, 241, 0.72);
}

.page-faq .faq-shortcuts__list {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 11px;
}

.page-faq .faq-shortcut {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  grid-template-rows: auto auto;
  column-gap: 14px;
  row-gap: 3px;
  padding: 15px 18px;
  border: 2px solid rgba(242, 246, 241, 0.24);
  background-color: rgba(6, 19, 28, 0.38);
  color: var(--paper);
  text-decoration: none;
  transition: transform 0.2s var(--ease), border-color 0.2s var(--ease),
    box-shadow 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-faq .faq-shortcut:hover {
  transform: translateY(-4px);
  border-color: var(--lime);
  box-shadow: var(--shadow-soft);
  background-color: rgba(6, 19, 28, 0.64);
}

.page-faq .faq-shortcut:focus-visible {
  outline: 3px solid var(--lime);
  outline-offset: 3px;
}

.page-faq .faq-shortcut__num {
  grid-row: 1 / 3;
  align-self: center;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 15px;
  letter-spacing: 0.06em;
  color: var(--lime);
}

.page-faq .faq-shortcut__label {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.4;
}

.page-faq .faq-shortcut__hint {
  font-size: 13px;
  line-height: 1.65;
  color: rgba(242, 246, 241, 0.66);
}

/* ---------- 问答主体 ---------- */

.page-faq .faq-body {
  padding: clamp(44px, 6vw, 86px) 0 clamp(48px, 6.5vw, 92px);
}

.page-faq .faq-body__inner {
  display: grid;
  gap: 26px;
}

.page-faq .faq-index {
  border-top: 2px solid var(--lime);
  padding-top: 15px;
}

.page-faq .faq-index__title {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0 0 4px;
  display: flex;
  gap: 4px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-index__link {
  display: block;
  flex: 0 0 auto;
  padding: 9px 12px;
  border-bottom: 2px solid transparent;
  color: var(--mist);
  font-size: 14px;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease),
    background-color 0.2s var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--lime);
  border-bottom-color: var(--lime);
  background-color: rgba(216, 255, 62, 0.05);
}

.page-faq .faq-index__link:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 2px;
}

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

.page-faq .faq-group {
  padding-bottom: clamp(28px, 4vw, 46px);
  scroll-margin-top: calc(var(--rail-top) + 26px);
}

.page-faq .faq-group:last-child {
  padding-bottom: 0;
}

.page-faq .faq-group + .faq-group {
  border-top: 1px solid var(--faq-rule-soft);
  padding-top: clamp(28px, 4vw, 46px);
}

.page-faq .faq-group__header {
  margin-bottom: 14px;
}

.page-faq .faq-group__kicker {
  display: inline-block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--lime);
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(23px, 3.2vw, 34px);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.page-faq .faq-group__intro {
  margin: 10px 0 0;
  max-width: 46ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(242, 246, 241, 0.66);
}

/* ---------- 折叠问答 ---------- */

.page-faq .faq-item {
  border-top: 1px solid var(--faq-rule);
  border-left: 3px solid transparent;
  transition: border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-faq .faq-item:last-child {
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .faq-item[open] {
  border-left-color: var(--lime);
  background-color: var(--faq-tint);
}

.page-faq .faq-item__q {
  position: relative;
  cursor: pointer;
  list-style: none;
  padding: 17px 44px 17px 18px;
  font-size: clamp(15px, 1.3vw, 16.5px);
  font-weight: 700;
  line-height: 1.6;
  color: var(--paper);
  transition: color 0.2s var(--ease), background-color 0.2s var(--ease);
}

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

.page-faq .faq-item__q::marker {
  content: "";
}

.page-faq .faq-item__q::after {
  content: "+";
  position: absolute;
  top: 50%;
  right: 16px;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--lime);
}

.page-faq .faq-item[open] .faq-item__q {
  color: var(--lime);
}

.page-faq .faq-item[open] .faq-item__q::after {
  content: "−";
}

.page-faq .faq-item__q:hover {
  background-color: rgba(242, 246, 241, 0.045);
}

.page-faq .faq-item__q:focus-visible {
  outline: 3px solid var(--lime);
  outline-offset: -3px;
}

.page-faq .faq-item__a {
  padding: 0 44px 18px 18px;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(242, 246, 241, 0.8);
}

.page-faq .faq-item__a p {
  margin: 0 0 8px;
}

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

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

.page-faq .faq-item__a a:hover,
.page-faq .faq-item__a a:focus-visible {
  color: var(--paper);
}

/* ---------- 反馈与联系 ---------- */

.page-faq .faq-feedback {
  background-color: var(--indigo);
  color: var(--paper);
  padding: clamp(44px, 6vw, 80px) 0 clamp(52px, 7vw, 92px);
  clip-path: polygon(0 0, 100% clamp(16px, 2.4vw, 32px), 100% 100%, 0 100%);
  scroll-margin-top: calc(var(--rail-top) + 26px);
}

.page-faq .faq-feedback__inner {
  display: grid;
  gap: 30px;
}

.page-faq .faq-feedback__kicker {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--lime);
}

.page-faq .faq-feedback__title {
  margin: 10px 0 0;
  font-size: clamp(24px, 3.6vw, 36px);
  font-weight: 900;
  line-height: 1.24;
  letter-spacing: -0.02em;
}

.page-faq .faq-feedback__lead {
  margin: 14px 0 0;
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(242, 246, 241, 0.78);
}

.page-faq .faq-feedback__list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-feedback__list li {
  position: relative;
  padding-left: 26px;
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(242, 246, 241, 0.82);
}

.page-faq .faq-feedback__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.68em;
  width: 12px;
  height: 2px;
  background-color: var(--lime);
}

.page-faq .faq-feedback__panel {
  align-self: start;
  padding: clamp(20px, 3vw, 30px);
  border: 2px solid rgba(242, 246, 241, 0.3);
  background-color: rgba(6, 19, 28, 0.44);
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-feedback__panel-title {
  margin: 0 0 16px;
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--lime);
}

.page-faq .faq-feedback__contact {
  display: grid;
  gap: 13px;
}

.page-faq .faq-feedback__row {
  display: grid;
  gap: 3px;
}

.page-faq .faq-feedback__key {
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-faq .faq-feedback__val {
  font-size: 15px;
  line-height: 1.6;
  color: var(--paper);
  word-break: break-word;
}

.page-faq .faq-feedback__note {
  margin: 18px 0 20px;
  font-size: 13px;
  line-height: 1.75;
  color: rgba(242, 246, 241, 0.68);
}

/* ---------- 平板与桌面栅格 ---------- */

@media (min-width: 860px) {
  .page-faq .faq-shortcuts__inner {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: clamp(30px, 4.5vw, 64px);
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
    gap: clamp(30px, 4.5vw, 68px);
  }

  .page-faq .faq-feedback__inner {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    gap: clamp(32px, 5vw, 72px);
  }
}

@media (min-width: 960px) {
  .page-faq .faq-body__inner {
    grid-template-columns: 214px minmax(0, 1fr);
    column-gap: clamp(32px, 5vw, 80px);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--rail-top) + 20px);
  }

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

  .page-faq .faq-index__link {
    border-bottom: 0;
    border-left: 2px solid transparent;
    white-space: normal;
  }

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    border-left-color: var(--lime);
    border-bottom-color: transparent;
  }
}

/* ---------- 窄屏收敛 ---------- */

@media (max-width: 520px) {
  .page-faq .faq-hero::before {
    width: 100%;
    right: -22%;
    opacity: 0.48;
  }

  .page-faq .faq-hero__media .media__img {
    aspect-ratio: 5 / 4;
  }

  .page-faq .faq-item__q {
    padding: 15px 40px 15px 14px;
  }

  .page-faq .faq-item__a {
    padding: 0 20px 16px 14px;
  }

  .page-faq .faq-shortcut {
    grid-template-columns: 38px minmax(0, 1fr);
    column-gap: 11px;
    padding: 13px 15px;
  }
}

/* ---------- 动效降级 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-shortcut,
  .page-faq .faq-item,
  .page-faq .faq-item__q,
  .page-faq .faq-index__link,
  .page-faq .faq-crumb a.breadcrumb__item {
    transition: none;
  }

  .page-faq .faq-shortcut:hover {
    transform: none;
  }
}
<<<END>>>