/* ==========================================================
   page-faq — 问题解答
   作用域全部限定在 .page-faq 内
   ========================================================== */

.page-faq {
  --faq-measure: 900px;
  --faq-edge: var(--ky-gutter);
  position: relative;
  padding-top: calc(var(--ky-header-h) + 16px);
  background:
    radial-gradient(1200px 440px at 10% -6%, rgba(47, 243, 210, 0.075), transparent 68%),
    radial-gradient(900px 380px at 96% 12%, rgba(124, 92, 255, 0.06), transparent 70%),
    var(--ky-void);
  color: var(--ky-body);
  font-family: var(--ky-font-body);
  overflow-x: clip;
}

.page-faq *,
.page-faq *::before,
.page-faq *::after {
  box-sizing: border-box;
}

.page-faq [id] {
  scroll-margin-top: calc(var(--ky-header-h) + 72px);
}

.page-faq .ky-figure {
  margin: 0;
}

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

/* ---------- 面包屑 ---------- */

.faq-crumb {
  border-bottom: 1px solid var(--ky-grid);
  background: rgba(11, 20, 36, 0.5);
}

.faq-crumb__inner {
  max-width: var(--ky-max);
  margin-inline: auto;
  padding: 12px var(--faq-edge);
}

.faq-crumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--ky-font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.faq-crumb__item--sep {
  color: var(--ky-grid-hi);
}

.faq-crumb__link {
  color: var(--ky-body);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ky-ease), border-color 0.2s var(--ky-ease);
}

.faq-crumb__link:hover,
.faq-crumb__link:focus-visible {
  color: var(--ky-cyan);
  border-bottom-color: var(--ky-cyan);
}

.page-faq .faq-crumb__link[aria-current="page"] {
  color: var(--ky-white);
  border-bottom-color: var(--ky-grid-hi);
}

/* ---------- 首屏 ---------- */

.faq-hero {
  padding-block: clamp(28px, 5.5vw, 58px) clamp(26px, 5vw, 52px);
}

.faq-hero__inner {
  width: 100%;
  max-width: var(--faq-measure);
  margin-inline: auto;
  padding-inline: var(--faq-edge);
}

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

.faq-hero__title {
  margin: 14px 0 0;
  font-family: var(--ky-font-display);
  font-size: clamp(1.85rem, 7vw, 3.5rem);
  font-weight: 600;
  line-height: 1.08;
  letter-spacing: -0.005em;
  color: var(--ky-white);
  max-width: 20ch;
}

.faq-hero__lead {
  margin: 20px 0 0;
  font-size: clamp(0.95rem, 1.5vw, 1.06rem);
  line-height: 1.85;
  max-width: 62ch;
  color: var(--ky-body);
}

.faq-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  margin: 28px 0 0;
  padding: 2px;
  list-style: none;
  background: var(--ky-grid);
  border: 2px solid var(--ky-grid);
}

.faq-hero__stats li {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 14px 14px 15px;
  background: var(--ky-hull);
}

.faq-stat__num {
  font-size: 1.45rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--ky-cyan);
  letter-spacing: -0.02em;
}

.faq-stat__label {
  font-size: 12px;
  line-height: 1.5;
  color: var(--ky-body);
}

.faq-hero__media {
  max-width: 1120px;
  margin: clamp(26px, 4.5vw, 44px) auto 0;
  padding-inline: var(--faq-edge);
}

.faq-hero__media .ky-figure {
  border: 2px solid var(--ky-grid);
  background: var(--ky-hull);
}

.faq-hero__media .ky-figure__frame {
  overflow: hidden;
  background:
    repeating-linear-gradient(90deg, rgba(34, 49, 74, 0.55) 0 1px, transparent 1px 40px),
    var(--ky-hull-2, #111D32);
}

.faq-hero__media .ky-figure__caption {
  padding: 11px 14px;
  border-top: 1px solid var(--ky-grid);
  font-family: var(--ky-font-mono);
  font-size: 12px;
  line-height: 1.7;
  color: var(--ky-body);
}

/* ---------- 主题筛选条 ---------- */

.faq-filterbar {
  position: sticky;
  top: var(--ky-header-h);
  z-index: 4;
  background: var(--ky-void);
  border-block: 2px solid var(--ky-grid);
  box-shadow: 0 12px 24px -18px rgba(0, 0, 0, 0.9);
}

.faq-filterbar__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  max-width: var(--faq-measure);
  margin-inline: auto;
  padding: 12px var(--faq-edge);
}

.faq-filterbar__label {
  flex: none;
  margin: 0;
  font-size: 10.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ky-cyan);
}

.faq-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .faq-chips .ky-chip {
  font-size: 13px;
  letter-spacing: 0.02em;
  padding: 7px 13px;
}

/* ---------- 问答主体 ---------- */

.faq-groups {
  max-width: var(--faq-measure);
  margin-inline: auto;
  padding-inline: var(--faq-edge);
}

.faq-group {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  padding-block: clamp(26px, 4.6vw, 48px);
  border-bottom: 2px solid var(--ky-grid);
  transition: opacity 0.25s var(--ky-ease);
}

.faq-group__marker {
  display: block;
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--ky-cyan);
}

.faq-group__title {
  margin: 0;
  font-family: var(--ky-font-display);
  font-size: clamp(1.22rem, 3.6vw, 1.72rem);
  font-weight: 600;
  line-height: 1.28;
  letter-spacing: 0.005em;
  color: var(--ky-white);
}

.faq-group__note {
  margin: 9px 0 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--ky-body);
  max-width: 56ch;
}

.faq-group__body {
  min-width: 0;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 18px;
}

/* ---------- 单条问答 ---------- */

.faq-item {
  position: relative;
  background: var(--ky-hull);
  border: 2px solid var(--ky-grid);
  transition: border-color 0.22s var(--ky-ease);
}

.faq-item::before {
  content: "";
  position: absolute;
  top: -2px;
  bottom: -2px;
  left: -2px;
  width: 3px;
  background: var(--ky-cyan);
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform 0.26s var(--ky-ease);
}

.faq-item[open] {
  border-color: var(--ky-grid-hi);
}

.faq-item[open]::before {
  transform: scaleY(1);
}

.faq-item__q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
  font-size: 15px;
  font-weight: 500;
  line-height: 1.65;
  color: var(--ky-white);
  transition: color 0.2s var(--ky-ease);
}

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

.faq-item__q:hover,
.faq-item__q:focus-visible {
  color: var(--ky-cyan);
}

.faq-item__q:focus-visible {
  outline: 2px solid var(--ky-cyan);
  outline-offset: -2px;
}

.faq-item__num {
  flex: none;
  min-width: 20px;
  padding-top: 5px;
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--ky-cyan);
}

.faq-item__text {
  flex: 1 1 auto;
  min-width: 0;
}

.faq-item__q::after {
  content: "+";
  flex: none;
  font-family: var(--ky-font-mono);
  font-size: 17px;
  line-height: 1.4;
  color: var(--ky-cyan);
  margin-left: 4px;
}

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

.faq-item__a {
  border-top: 1px dashed var(--ky-grid);
  padding: 14px 16px 18px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ky-body);
}

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

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

.faq-item__a a {
  color: var(--ky-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 243, 210, 0.45);
  transition: border-color 0.2s var(--ky-ease);
}

.faq-item__a a:hover,
.faq-item__a a:focus-visible {
  border-bottom-color: var(--ky-cyan);
}

.faq-num {
  font-family: var(--ky-font-mono);
  font-size: 1.05em;
  font-weight: 700;
  color: var(--ky-cyan);
  letter-spacing: -0.01em;
}

/* ---------- 数据章节配图 ---------- */

.fs-figure {
  margin-top: 24px !important;
  border: 2px solid var(--ky-grid);
  background: var(--ky-hull);
}

.fs-figure .ky-figure__frame {
  overflow: hidden;
  background:
    repeating-linear-gradient(0deg, rgba(34, 49, 74, 0.55) 0 1px, transparent 1px 32px),
    var(--ky-hull-2, #111D32);
}

.fs-figure .ky-figure__caption {
  padding: 11px 14px;
  border-top: 1px solid var(--ky-grid);
  font-family: var(--ky-font-mono);
  font-size: 12px;
  line-height: 1.7;
  color: var(--ky-body);
}

.fs-figure__link {
  margin: 14px 0 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--ky-body);
}

.fs-figure__link a {
  color: var(--ky-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 243, 210, 0.45);
}

.fs-figure__link a:hover,
.fs-figure__link a:focus-visible {
  border-bottom-color: var(--ky-cyan);
}

/* ---------- 中段速查 ---------- */

.faq-quick {
  border-block: 2px solid var(--ky-grid);
  background:
    linear-gradient(180deg, rgba(47, 243, 210, 0.05), transparent 140px),
    var(--ky-hull-2, #111D32);
  padding-block: clamp(30px, 5vw, 52px);
}

.faq-quick__inner {
  max-width: var(--faq-measure);
  margin-inline: auto;
  padding-inline: var(--faq-edge);
}

.faq-quick__title {
  margin: 0;
  font-family: var(--ky-font-display);
  font-size: clamp(1.1rem, 3vw, 1.42rem);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: 0.01em;
  color: var(--ky-white);
}

.faq-quick__note {
  margin: 7px 0 20px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ky-body);
}

.faq-quick__list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 2px solid var(--ky-grid);
}

.faq-quick__list li {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 12px;
  align-items: baseline;
  padding: 11px 0 12px;
  border-bottom: 1px solid var(--ky-grid);
  font-size: 13.5px;
  line-height: 1.7;
}

.faq-quick__k {
  flex: 0 0 auto;
  color: var(--ky-white);
  font-weight: 500;
}

.faq-quick__v {
  flex: 1 1 auto;
  min-width: 0;
  color: var(--ky-body);
}

.faq-quick__v::before {
  content: "→";
  margin-right: 7px;
  font-family: var(--ky-font-mono);
  color: var(--ky-cyan);
}

/* ---------- 联系入口 ---------- */

.faq-help {
  padding-block: clamp(34px, 6vw, 68px);
}

.faq-help__inner {
  max-width: var(--faq-measure);
  margin-inline: auto;
  padding-inline: var(--faq-edge);
}

.faq-help__box {
  padding: clamp(20px, 3.4vw, 32px);
  background: var(--ky-hull);
  border: 2px solid var(--ky-grid);
  border-left: 4px solid var(--ky-orange);
  box-shadow: var(--ky-shadow-hard);
}

.faq-help__eyebrow {
  margin: 0;
  font-size: 10.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ky-orange);
}

.faq-help__title {
  margin: 10px 0 0;
  font-family: var(--ky-font-display);
  font-size: clamp(1.32rem, 3.8vw, 1.9rem);
  font-weight: 600;
  line-height: 1.22;
  color: var(--ky-white);
}

.faq-help__text {
  margin: 13px 0 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ky-body);
  max-width: 58ch;
}

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

.faq-help__meta {
  margin: 20px 0 0;
  padding-top: 14px;
  border-top: 1px dashed var(--ky-grid);
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--ky-body);
  word-break: break-word;
}

/* ---------- 筛选降级态 ---------- */

.page-faq .faq-group.is-league-dim {
  opacity: 0.26;
}

.page-faq .faq-group.is-league-hit {
  opacity: 1;
}

/* ---------- 平板及以上 ---------- */

@media (min-width: 700px) {
  .faq-quick__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 30px;
  }
}

@media (min-width: 860px) {
  .page-faq {
    --faq-measure: 940px;
  }

  .faq-group {
    grid-template-columns: 78px minmax(0, 1fr);
    gap: 28px;
  }

  .faq-group__marker {
    padding-top: 6px;
    padding-right: 16px;
    text-align: right;
    border-right: 2px solid var(--ky-grid);
    align-self: start;
  }

  .faq-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .faq-item__q {
    font-size: 15.5px;
    padding: 16px 18px;
  }

  .faq-item__a {
    padding: 16px 18px 20px 50px;
    font-size: 15px;
  }
}

/* ---------- 大屏 ---------- */

@media (min-width: 1180px) {
  .faq-hero__title {
    font-size: clamp(2.6rem, 4.6vw, 3.7rem);
  }
}

/* ---------- 减少动效 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    transition-duration: 0.001ms !important;
    animation-duration: 0.001ms !important;
  }
}