/* ===========================================================
   常见问题 页面专属样式  (作用域 .page-faq)
   =========================================================== */

.page-faq {
  --faq-indent: 18px;
  --faq-index-w: 248px;
  --faq-panel: rgba(20, 44, 78, 0.42);
  position: relative;
  background:
    radial-gradient(115% 72% at 84% -8%, rgba(20, 44, 78, 0.92) 0%, rgba(11, 27, 51, 0) 64%),
    linear-gradient(180deg, #0B1B33 0%, #0B1B33 62%, #102341 100%);
  color: var(--snow);
  font-family: var(--f-body);
  font-size: var(--fs-16);
  line-height: 1.75;
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  padding: 26px 0 12px;
}

.page-faq .faq-hero__inner {
  position: relative;
}

.page-faq .faq-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin: 0 0 26px;
  padding: 0;
  list-style: none;
  font-family: var(--f-mono);
  font-size: var(--fs-13);
  letter-spacing: 0.06em;
  color: var(--rock);
}

.page-faq .faq-crumb li + li::before {
  content: "/";
  margin-right: 6px;
  color: var(--line-strong);
}

.page-faq .faq-crumb a {
  color: var(--rock);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--t-fast), border-color var(--t-fast);
}

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

.page-faq .faq-crumb [aria-current="page"] {
  color: var(--snow);
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
  align-items: end;
}

.page-faq .faq-hero__lede {
  position: relative;
  padding-left: var(--faq-indent);
}

.page-faq .faq-hero__lede::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  width: 3px;
  height: calc(100% - 8px);
  background: linear-gradient(180deg, var(--gold) 0%, rgba(227, 169, 60, 0.08) 100%);
}

.page-faq .faq-hero h1 {
  margin: 14px 0 18px;
  font-family: var(--f-display);
  font-weight: 800;
  font-size: clamp(var(--fs-32), 5vw, var(--fs-56));
  line-height: 1.2;
  letter-spacing: 0.03em;
  color: var(--snow);
}

.page-faq .faq-hero__intro {
  margin: 0;
  max-width: 46ch;
  color: rgba(242, 245, 248, 0.82);
}

.page-faq .faq-hero__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.page-faq .faq-hero__media {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--deep);
}

.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.94);
}

/* ---------- 状态标签 ---------- */

.page-faq .faq-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  flex: 0 0 auto;
  padding: 3px 10px;
  border: 1px solid currentColor;
  border-radius: 999px;
  font-family: var(--f-mono);
  font-size: var(--fs-13);
  letter-spacing: 0.06em;
  line-height: 1.5;
  white-space: nowrap;
}

.page-faq .faq-tag__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

.page-faq .faq-tag--common {
  color: var(--gold);
}

.page-faq .faq-tag--notice {
  color: var(--orange);
}

/* ---------- 主体：索引 + 答案 ---------- */

.page-faq .faq-board {
  padding: 44px 0 88px;
}

.page-faq .faq-board__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 36px;
}

.page-faq .faq-index {
  padding: 20px 18px;
  border: 1px solid var(--line);
  background: rgba(242, 245, 248, 0.04);
}

.page-faq .faq-index__title {
  margin: 0 0 16px;
  font-family: var(--f-mono);
  font-size: var(--fs-13);
  font-weight: 400;
  letter-spacing: 0.14em;
  color: var(--rock);
  text-transform: uppercase;
}

.page-faq .faq-index__list {
  display: grid;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-index__list a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  min-height: 44px;
  padding: 11px 12px;
  border-left: 2px solid transparent;
  color: var(--rock);
  font-size: var(--fs-14);
  text-decoration: none;
  transition: color var(--t-fast), background-color var(--t-fast), border-color var(--t-fast);
}

.page-faq .faq-index__list a .mono {
  color: var(--clay);
  transition: color var(--t-fast);
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  color: var(--snow);
  background: var(--glass-hover);
  border-left-color: var(--orange);
}

.page-faq .faq-index__list a:hover .mono,
.page-faq .faq-index__list a:focus-visible .mono {
  color: var(--gold);
}

.page-faq .faq-index__foot {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-size: var(--fs-13);
  color: var(--rock);
}

/* ---------- 分组 ---------- */

.page-faq .faq-groups {
  display: grid;
  gap: 56px;
  min-width: 0;
}

.page-faq .faq-group {
  scroll-margin-top: calc(var(--header-h-sm) + 24px);
  min-width: 0;
}

.page-faq .faq-group__head {
  position: relative;
  padding: 0 0 18px 16px;
  border-bottom: 1px solid var(--line-strong);
  border-left: 2px solid var(--gold);
}

.page-faq .faq-group:target .faq-group__head {
  animation: faq-flash 1800ms ease forwards;
}

@keyframes faq-flash {
  0% { background-color: rgba(227, 169, 60, 0.16); }
  100% { background-color: transparent; }
}

.page-faq .faq-group__num {
  display: block;
  color: var(--clay);
  margin-bottom: 8px;
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--f-display);
  font-weight: 700;
  font-size: clamp(var(--fs-24), 3.2vw, var(--fs-32));
  line-height: 1.35;
  letter-spacing: 0.02em;
  color: var(--snow);
}

.page-faq .faq-group__note {
  margin: 10px 0 0;
  max-width: 52ch;
  color: var(--rock);
  font-size: var(--fs-14);
}

/* ---------- 问答条目 ---------- */

.page-faq .faq-list {
  display: grid;
}

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

.page-faq .faq-item > summary {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  min-height: 44px;
  padding: 20px 4px;
  cursor: pointer;
  list-style: none;
  transition: color var(--t-fast);
}

.page-faq .faq-item > summary::-webkit-details-marker {
  display: none;
}

.page-faq .faq-item > summary::after {
  content: "";
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  margin-left: auto;
  margin-top: 8px;
  border-right: 2px solid var(--gold);
  border-bottom: 2px solid var(--gold);
  transform: rotate(45deg);
  transition: transform var(--t-fast), border-color var(--t-fast);
}

.page-faq .faq-item > summary:hover,
.page-faq .faq-item > summary:focus-visible {
  color: var(--gold);
}

.page-faq .faq-item > summary:hover::after {
  border-color: var(--orange);
}

.page-faq .faq-item > summary:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 2px;
}

.page-faq .faq-item[open] > summary {
  color: var(--snow);
}

.page-faq .faq-item[open] > summary::after {
  transform: rotate(-135deg);
  border-color: var(--orange);
}

.page-faq .faq-item__q {
  font-family: var(--f-display);
  font-weight: 700;
  font-size: var(--fs-18);
  line-height: 1.55;
  letter-spacing: 0.01em;
  color: inherit;
}

.page-faq .faq-item > summary .faq-tag {
  margin-top: 3px;
}

.page-faq .faq-item__body {
  padding: 2px 4px 24px;
  animation: faq-open var(--t-fast) ease;
}

@keyframes faq-open {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

.page-faq .faq-item__body p {
  margin: 0;
  max-width: 62ch;
  color: rgba(242, 245, 248, 0.8);
}

/* ---------- 自助排查步骤 ---------- */

.page-faq .faq-steps {
  display: grid;
  gap: 26px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-steps__item {
  position: relative;
  padding: 20px 18px 22px;
  border: 1px solid var(--line);
  background: rgba(242, 245, 248, 0.04);
  transition: transform var(--t-fast), background-color var(--t-fast), border-color var(--t-fast);
}

.page-faq .faq-steps__item::after {
  content: "";
  position: absolute;
  left: 30px;
  bottom: -17px;
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--gold);
  border-bottom: 2px solid var(--gold);
  transform: rotate(45deg);
}

.page-faq .faq-steps__item:last-child::after {
  display: none;
}

.page-faq .faq-steps__item:hover {
  transform: translateY(-4px);
  background: var(--glass-hover);
  border-color: var(--line-strong);
}

.page-faq .faq-steps__idx {
  display: block;
  color: var(--gold);
  margin-bottom: 10px;
}

.page-faq .faq-steps__title {
  margin: 0 0 8px;
  font-family: var(--f-display);
  font-weight: 700;
  font-size: var(--fs-18);
  letter-spacing: 0.02em;
  color: var(--snow);
}

.page-faq .faq-steps__item p {
  margin: 0;
  font-size: var(--fs-14);
  color: rgba(242, 245, 248, 0.76);
}

.page-faq .faq-group__media {
  margin: 34px 0 0;
  border: 1px solid var(--line);
  background: var(--deep);
}

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

/* ---------- 仍然没解决 ---------- */

.page-faq .faq-help {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  margin-top: 28px;
  border: 1px solid var(--line);
  background: var(--faq-panel);
}

.page-faq .faq-help__channels {
  display: grid;
  gap: 0;
  padding: 24px 22px;
  border-bottom: 1px solid var(--line);
  background: rgba(11, 27, 51, 0.42);
}

.page-faq .faq-help__channel + .faq-help__channel {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px dashed var(--line);
}

.page-faq .faq-help__label {
  display: block;
  color: var(--rock);
  margin-bottom: 6px;
}

.page-faq .faq-help__value {
  font-family: var(--f-mono);
  font-size: var(--fs-18);
  letter-spacing: 0.04em;
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--t-fast), border-color var(--t-fast);
  word-break: break-all;
}

.page-faq .faq-help__value:hover,
.page-faq .faq-help__value:focus-visible {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

.page-faq .faq-help__body {
  padding: 24px 22px 28px;
}

.page-faq .faq-help__subtitle {
  margin: 0 0 16px;
  font-family: var(--f-display);
  font-weight: 700;
  font-size: var(--fs-18);
  letter-spacing: 0.02em;
  color: var(--snow);
}

.page-faq .faq-help__list {
  display: grid;
  gap: 12px;
  margin: 0 0 20px;
  padding: 0;
  list-style: none;
}

.page-faq .faq-help__list li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  font-size: var(--fs-14);
  color: rgba(242, 245, 248, 0.78);
}

.page-faq .faq-help__list .mono {
  flex: 0 0 auto;
  width: 22px;
  height: 22px;
  margin-top: 3px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--clay);
  color: var(--clay);
  font-size: var(--fs-13);
  line-height: 1;
}

.page-faq .faq-help__tip {
  margin: 0 0 22px;
  padding: 12px 14px;
  border-left: 2px solid var(--moss);
  background: rgba(79, 122, 99, 0.12);
  font-size: var(--fs-14);
  color: rgba(242, 245, 248, 0.82);
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-faq .faq-help__more {
  margin: 26px 0 0;
  font-size: var(--fs-14);
  color: var(--rock);
}

.page-faq .faq-help__more a {
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(227, 169, 60, 0.4);
  transition: color var(--t-fast), border-color var(--t-fast);
}

.page-faq .faq-help__more a:hover,
.page-faq .faq-help__more a:focus-visible {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

/* ---------- 中屏 ---------- */

@media (min-width: 700px) {
  .page-faq .faq-hero {
    padding: 36px 0 16px;
  }

  .page-faq .faq-index {
    padding: 24px 20px;
  }

  .page-faq .faq-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px 22px;
  }

  .page-faq .faq-steps__item::after {
    left: auto;
    right: -16px;
    bottom: auto;
    top: 42px;
    transform: rotate(-45deg);
  }

  .page-faq .faq-steps__item:nth-child(2n)::after {
    display: none;
  }

  .page-faq .faq-steps__item:nth-child(2n + 1) {
    transform: translateY(-12px);
  }

  .page-faq .faq-steps__item:nth-child(2n + 1):hover {
    transform: translateY(-16px);
  }

  .page-faq .faq-help {
    grid-template-columns: minmax(0, 5fr) minmax(0, 8fr);
  }

  .page-faq .faq-help__channels {
    border-bottom: 0;
    border-right: 1px solid var(--line);
    padding: 28px 24px;
  }

  .page-faq .faq-help__body {
    padding: 28px 26px 32px;
  }
}

/* ---------- 桌面：左侧索引列 ---------- */

@media (min-width: 1024px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 48px;
  }

  .page-faq .faq-board {
    padding: 56px 0 112px;
  }

  .page-faq .faq-board__grid {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    gap: 56px;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h-sm) + 28px);
    align-self: start;
    background: rgba(242, 245, 248, 0.05);
    backdrop-filter: blur(6px);
  }

  .page-faq .faq-groups {
    gap: 72px;
  }

  .page-faq .faq-steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 22px;
  }

  .page-faq .faq-steps__item:nth-child(2n)::after {
    display: block;
  }

  .page-faq .faq-steps__item:last-child::after {
    display: none;
  }

  .page-faq .faq-steps__item:nth-child(2n + 1) {
    transform: translateY(-14px);
  }

  .page-faq .faq-steps__item:nth-child(2n) {
    transform: translateY(10px);
  }

  .page-faq .faq-steps__item:nth-child(2n + 1):hover {
    transform: translateY(-18px);
  }

  .page-faq .faq-steps__item:nth-child(2n):hover {
    transform: translateY(6px);
  }

  .page-faq .faq-steps__idx {
    font-size: var(--fs-13);
  }
}

@media (min-width: 1280px) {
  .page-faq .faq-item__body {
    padding-left: 0;
  }
}

/* ---------- 动效降级 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__body {
    animation: none;
  }

  .page-faq .faq-group:target .faq-group__head {
    animation: none;
    background-color: rgba(227, 169, 60, 0.16);
  }

  .page-faq .faq-steps__item,
  .page-faq .faq-steps__item:hover,
  .page-faq .faq-steps__item:nth-child(2n + 1),
  .page-faq .faq-steps__item:nth-child(2n + 1):hover,
  .page-faq .faq-steps__item:nth-child(2n),
  .page-faq .faq-steps__item:nth-child(2n):hover {
    transform: none;
    transition: background-color var(--t-fast), border-color var(--t-fast);
  }

  .page-faq .faq-item > summary::after {
    transition: none;
  }
}