/* ===== 知识中心 · 页面专属样式（作用域 .page-faq） ===== */

.page-faq {
  --faq-rule: rgba(14, 27, 42, .12);
  --faq-answer: rgba(14, 27, 42, .84);
  --faq-ink-soft: rgba(244, 239, 230, .8);
  background: var(--paper);
  font-family: var(--font-body);
}

/* ---------- 首屏框景 ---------- */
.page-faq .faq-hero {
  padding-top: clamp(24px, 4vw, 52px);
}

.page-faq .faq-frame {
  position: relative;
  display: grid;
  background: var(--paper-lite);
  border: 1px solid var(--line);
}

.page-faq .faq-frame::before,
.page-faq .faq-frame::after {
  content: "";
  position: absolute;
  width: 16px;
  height: 16px;
  border: 2px solid var(--gold);
  pointer-events: none;
}

.page-faq .faq-frame::before {
  top: -2px;
  left: -2px;
  border-right: 0;
  border-bottom: 0;
}

.page-faq .faq-frame::after {
  right: -2px;
  bottom: -2px;
  border-left: 0;
  border-top: 0;
}

.page-faq .faq-frame__inner {
  padding: clamp(20px, 4vw, 46px);
}

.page-faq .faq-kicker {
  margin: 18px 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--red);
  display: flex;
  align-items: center;
  gap: 10px;
}

.page-faq .faq-kicker::before {
  content: "";
  width: 28px;
  height: 2px;
  background: var(--red);
}

.page-faq .faq-hero__lead {
  margin: 16px 0 0;
  max-width: 56ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--faq-answer);
}

.page-faq .faq-hero__facts {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 32px;
}

.page-faq .faq-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding-left: 14px;
  border-left: 2px solid var(--line);
}

.page-faq .faq-hero__num {
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--ink);
}

.page-faq .faq-hero__label {
  font-size: 13px;
  color: rgba(14, 27, 42, .62);
}

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

.page-faq .faq-hero__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 问答主板：坐标索引 + 问题组 ---------- */
.page-faq .faq-board {
  background: var(--paper);
}

.page-faq .faq-board__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}

.page-faq .faq-index {
  border-bottom: 1px solid var(--line);
  padding-bottom: 18px;
}

.page-faq .faq-index__title {
  margin: 0 0 14px;
  font-family: var(--font-head);
  font-size: 15px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--ink);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 8px;
}

.page-faq .faq-index__list a {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 7px 12px;
  border: 1px solid var(--line);
  background: var(--paper-lite);
  color: var(--ink);
  font-size: 13.5px;
  text-decoration: none;
  transition: border-color .25s var(--ease), color .25s var(--ease), background-color .25s var(--ease);
}

.page-faq .faq-index__list a .mono {
  font-size: 11px;
  color: var(--gold);
  letter-spacing: .08em;
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  border-color: var(--cyan);
  color: var(--red);
  background: #fff;
}

.page-faq .faq-index__note {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.7;
}

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

.page-faq .faq-group + .faq-group {
  margin-top: clamp(36px, 5vw, 60px);
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: 12px;
  row-gap: 4px;
  align-items: baseline;
  border-top: 3px solid var(--ink);
  padding-top: 14px;
  margin-bottom: 10px;
}

.page-faq .faq-group__code {
  font-size: 13px;
  font-weight: 700;
  color: var(--red);
  letter-spacing: .1em;
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1.15;
  color: var(--ink);
}

.page-faq .faq-group__note {
  grid-column: 2;
  margin: 0;
  font-size: 13px;
  color: rgba(14, 27, 42, .56);
}

/* ---------- 单条问答 ---------- */
.page-faq .faq-item {
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .faq-item__q {
  appearance: none;
  width: 100%;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 10px;
  align-items: baseline;
  margin: 0;
  padding: 18px 10px;
  background: transparent;
  border: 0;
  border-radius: 0;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16.5px;
  line-height: 1.6;
  text-align: left;
  cursor: pointer;
  transition: background-color .25s var(--ease), color .25s var(--ease);
}

.page-faq .faq-item__q:hover,
.page-faq .faq-item__q:focus-visible {
  background: var(--paper-lite);
}

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

.page-faq .faq-item__q:hover .faq-item__text,
.page-faq .faq-item__q[aria-expanded="true"] .faq-item__text {
  color: var(--red);
}

.page-faq .faq-item__no {
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--gold);
  padding-top: 4px;
}

.page-faq .faq-item__sign {
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--gold);
  transition: transform .3s var(--ease), color .25s var(--ease);
}

.page-faq .faq-item__q[aria-expanded="true"] .faq-item__sign {
  transform: rotate(45deg);
  color: var(--red);
}

.page-faq .faq-item__a {
  display: none;
  padding: 0 10px 20px 44px;
}

.page-faq .faq-item__a[data-open] {
  display: block;
}

.page-faq .faq-item__a p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--faq-answer);
}

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

.page-faq .faq-item__a a:hover {
  color: var(--red);
}

/* ---------- 状态对照面板 ---------- */
.page-faq .faq-status__panel {
  display: grid;
  gap: clamp(20px, 3vw, 36px);
  padding: clamp(20px, 3.5vw, 40px);
}

.page-faq .faq-status__media {
  margin: 0;
}

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

.page-faq .faq-status__kicker {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-status__body h2 {
  margin: 0;
  color: var(--paper-lite);
  font-family: var(--font-head);
  font-size: clamp(24px, 3.2vw, 34px);
  line-height: 1.15;
}

.page-faq .faq-status__legend {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-faq .faq-status__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding-top: 14px;
  border-top: 1px solid var(--line-invert);
}

.page-faq .faq-status__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--faq-ink-soft);
}

.page-faq .faq-status__body .btn {
  margin-top: 26px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-faq .faq-item__a {
    padding-left: 52px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-frame {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
    align-items: stretch;
  }

  .page-faq .faq-hero__media {
    border-top: 0;
    border-left: 1px solid var(--line);
    min-height: 100%;
  }

  .page-faq .faq-status__panel {
    grid-template-columns: minmax(0, 300px) minmax(0, 1fr);
    align-items: center;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-board__grid {
    grid-template-columns: 216px minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--top-h) + 22px);
    border-bottom: 0;
    border-left: 2px solid var(--ink);
    padding: 0 0 0 16px;
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 2px;
  }

  .page-faq .faq-index__list a {
    width: 100%;
    border-color: transparent;
    background: transparent;
    padding: 8px 10px;
  }

  .page-faq .faq-index__list a:hover,
  .page-faq .faq-index__list a:focus-visible {
    background: var(--paper-lite);
    border-color: var(--line);
  }
}

@media (max-width: 560px) {
  .page-faq .faq-item__q {
    font-size: 15.5px;
    padding: 16px 4px;
    gap: 8px;
  }

  .page-faq .faq-item__a {
    padding: 0 4px 18px 4px;
  }

  .page-faq .faq-hero__facts {
    gap: 12px 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__q,
  .page-faq .faq-item__sign,
  .page-faq .faq-index__list a {
    transition: none;
  }
}