/* ===== 帮助中心 page-faq ===== */
.page-faq {
  --faq-col: 780px;
  --faq-line: var(--frost);
}

.page-faq .faq-col {
  max-width: var(--faq-col);
  margin-inline: auto;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: 32px 0 8px;
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  top: -24px;
  right: -40px;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: repeating-linear-gradient(-38deg, rgba(24, 118, 224, 0.14) 0 5px, transparent 5px 15px);
  pointer-events: none;
  z-index: 0;
}

.page-faq .faq-hero > * {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__title {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(2rem, 7vw, 3.4rem);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--space);
  margin: 14px 0 18px;
  max-width: 16ch;
}

.page-faq .faq-hero__title em {
  font-style: normal;
  color: var(--sky);
}

.page-faq .faq-hero .lede {
  max-width: 36rem;
  color: var(--track);
}

.page-faq .faq-hero__facts {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
  margin: 22px 0 0;
  padding: 0;
}

.page-faq .faq-hero__facts li {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--sky-deep);
  background: var(--ice);
  border-radius: 999px;
  padding: 6px 13px;
}

/* ---------- 高频问题卡片 ---------- */
.page-faq .faq-hot-block {
  margin-top: 44px;
}

.page-faq .faq-hot__title {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(1.4rem, 4.6vw, 1.9rem);
  line-height: 1.2;
  color: var(--space);
  margin: 0 0 8px;
}

.page-faq .faq-hot__sub {
  margin: 0;
  font-size: 15px;
  color: var(--track);
}

.page-faq .faq-hot {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin-top: 20px;
}

.page-faq .faq-hot__item {
  display: grid;
  justify-items: start;
  gap: 7px;
  padding: 16px 18px;
  border-radius: var(--r-md);
  background: var(--paper);
  border: 1px solid var(--faq-line);
  text-decoration: none;
  color: inherit;
  transition: transform 0.24s var(--ease), box-shadow 0.24s var(--ease), border-color 0.24s var(--ease);
}

.page-faq .faq-hot__item:hover {
  transform: translateY(-2px);
  box-shadow: var(--sh-2);
  border-color: var(--sky);
}

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

.page-faq .faq-hot__q {
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--space);
}

.page-faq .faq-hot__a {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--track);
}

/* ---------- 分组导航 ---------- */
.page-faq .faq-jump {
  position: sticky;
  top: calc(var(--topbar-h) + 6px);
  z-index: 6;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 10px 2px;
  margin: 34px 0 4px;
  background: linear-gradient(180deg, var(--cloud) 62%, rgba(247, 249, 252, 0.72) 100%);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  scrollbar-width: none;
}

.page-faq .faq-jump::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-jump a {
  flex: none;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--space);
  text-decoration: none;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--frost);
  background: var(--paper);
  white-space: nowrap;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-faq .faq-jump a:hover {
  color: var(--sky);
  border-color: var(--sky);
  background: var(--ice);
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-group {
  margin-top: 34px;
  padding-top: 34px;
  border-top: 1px solid var(--faq-line);
  scroll-margin-top: calc(var(--topbar-h) + 76px);
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 2px 14px;
  align-items: start;
  margin-bottom: 18px;
}

.page-faq .faq-group__num {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: 38px;
  line-height: 0.92;
  letter-spacing: -0.03em;
  color: var(--sky);
}

.page-faq .faq-group__title {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(1.45rem, 4.6vw, 2rem);
  line-height: 1.2;
  color: var(--space);
  margin: 0 0 6px;
}

.page-faq .faq-group__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--track);
  max-width: 42ch;
}

.page-faq .faq-shot {
  margin: 0 0 20px;
  border-radius: var(--r-md);
  overflow: hidden;
  border: 1px solid var(--faq-line);
}

.page-faq .faq-shot img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 折叠问答 ---------- */
.page-faq .qa {
  border-top: 1px solid var(--faq-line);
}

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

.page-faq .qa__q {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 0;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.55;
  color: var(--space);
  transition: color 0.2s var(--ease);
}

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

.page-faq .qa__q:hover {
  color: var(--sky);
}

.page-faq .qa__q:focus-visible {
  outline: 2px solid var(--sky);
  outline-offset: 3px;
  border-radius: var(--r-sm);
}

.page-faq .qa__sign {
  position: relative;
  flex: none;
  width: 18px;
  height: 18px;
  margin-top: 3px;
}

.page-faq .qa__sign::before,
.page-faq .qa__sign::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 2px;
  border-radius: 2px;
  background: var(--sky);
  transform: translateY(-50%);
  transition: transform 0.28s var(--ease), opacity 0.28s var(--ease);
}

.page-faq .qa__sign::after {
  transform: translateY(-50%) rotate(90deg);
}

.page-faq .qa[open] .qa__sign::after {
  transform: translateY(-50%) rotate(0deg);
}

.page-faq .qa__a {
  padding: 0 0 18px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--track);
  max-width: 42rem;
}

.page-faq .qa[open] .qa__a {
  animation: faq-slide-in 0.28s var(--ease) both;
}

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

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

.page-faq .qa__a a {
  color: var(--sky);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

/* ---------- 深色分组：专栏与提醒 ---------- */
.page-faq .faq-group--night {
  background: var(--space);
  color: var(--cloud);
  border-top: 0;
  border-radius: var(--r-lg);
  padding: 30px 20px 22px;
}

.page-faq .faq-group--night .faq-group__num {
  color: var(--orange);
}

.page-faq .faq-group--night .faq-group__title {
  color: var(--paper);
}

.page-faq .faq-group--night .faq-group__desc {
  color: rgba(214, 231, 250, 0.76);
}

.page-faq .faq-group--night .qa {
  border-top-color: rgba(247, 249, 252, 0.16);
}

.page-faq .faq-group--night .qa:last-child {
  border-bottom-color: rgba(247, 249, 252, 0.16);
}

.page-faq .faq-group--night .qa__q {
  color: var(--cloud);
}

.page-faq .faq-group--night .qa__q:hover {
  color: var(--gold);
}

.page-faq .faq-group--night .qa__a {
  color: rgba(214, 231, 250, 0.82);
}

.page-faq .faq-group--night .qa__a a {
  color: var(--gold);
}

.page-faq .faq-group--night .qa__sign::before,
.page-faq .faq-group--night .qa__sign::after {
  background: var(--gold);
}

/* ---------- 联系客服 ---------- */
.page-faq .faq-help {
  margin: 52px 0 24px;
  padding: 30px 22px 26px;
  border-radius: var(--r-lg);
  background: linear-gradient(135deg, var(--night) 0%, var(--space) 78%);
  color: var(--cloud);
}

.page-faq .faq-help__title {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(1.4rem, 4.6vw, 1.9rem);
  line-height: 1.25;
  color: var(--paper);
  margin: 0 0 10px;
}

.page-faq .faq-help__lede {
  margin: 0 0 22px;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(214, 231, 250, 0.8);
  max-width: 40rem;
}

.page-faq .faq-help__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-faq .faq-help__item {
  display: grid;
  justify-items: start;
  gap: 6px;
  padding: 14px 16px;
  border-radius: var(--r-md);
  background: rgba(247, 249, 252, 0.07);
  border: 1px solid rgba(247, 249, 252, 0.14);
}

.page-faq .faq-help__label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--gold);
}

.page-faq .faq-help__value {
  font-size: 16px;
  font-weight: 700;
  color: var(--paper);
  word-break: break-all;
}

.page-faq .faq-help__value--text {
  font-weight: 500;
  font-size: 15px;
  line-height: 1.6;
  color: rgba(214, 231, 250, 0.9);
  word-break: normal;
}

.page-faq .faq-help .copy-btn {
  margin-top: 2px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--cloud);
  background: rgba(247, 249, 252, 0.1);
  border: 1px solid rgba(247, 249, 252, 0.24);
  border-radius: 999px;
  padding: 5px 12px;
  cursor: pointer;
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-faq .faq-help .copy-btn:hover {
  background: rgba(247, 249, 252, 0.2);
  border-color: var(--gold);
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

/* ---------- 平板与桌面 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-hot {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (min-width: 1024px) {
  .page-faq .faq-hero {
    padding-top: 48px;
  }

  .page-faq .faq-hero::after {
    width: 220px;
    height: 220px;
    right: -30px;
  }

  .page-faq .faq-group {
    margin-top: 46px;
    padding-top: 46px;
  }

  .page-faq .faq-group__num {
    font-size: 52px;
  }

  .page-faq .faq-group--night {
    padding: 42px 40px 30px;
  }

  .page-faq .faq-help {
    padding: 44px 42px 38px;
    margin-top: 64px;
  }

  .page-faq .qa__q {
    font-size: 17px;
    padding: 18px 0;
  }
}

/* ---------- 降低动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .qa[open] .qa__a {
    animation: none;
  }

  .page-faq .faq-hot__item:hover {
    transform: none;
  }

  .page-faq .qa__sign::before,
  .page-faq .qa__sign::after {
    transition: none;
  }
}