/* ===== 答疑中心 · 页面专属样式 ===== */
.page-faq {
  --faq-card: #12211C;
  --faq-card-hi: rgba(198, 255, 61, .07);
  --faq-line-lime: rgba(198, 255, 61, .38);
  --faq-pad: clamp(16px, 2.4vw, 22px);
}

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

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(28px, 5vw, 56px) 0 clamp(30px, 5vw, 52px);
  border-bottom: 1px solid var(--line-strong);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: 0;
  top: 22%;
  width: min(300px, 34%);
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--lime));
  opacity: .45;
  pointer-events: none;
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(26px, 4vw, 46px);
  margin-top: 18px;
}

.page-faq .faq-hero h1 {
  margin: 0 0 18px;
  font-family: var(--font-head);
  font-size: clamp(30px, 6.4vw, 54px);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -.02em;
  color: var(--white);
  max-width: 17em;
}

.page-faq .faq-hero__lead .lede {
  margin: 0;
  max-width: 56ch;
}

.page-faq .faq-hero__stats {
  display: grid;
  gap: 1px;
  margin: 0;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .faq-stat {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 13px 16px;
  background: var(--panel);
}

.page-faq .faq-stat__label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--mist);
}

.page-faq .faq-stat__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 17px;
  letter-spacing: -.01em;
  color: var(--lime);
  white-space: nowrap;
}

/* ---------- 高频问题速览 ---------- */
.page-faq .faq-hot__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
}

.page-faq .faq-hot__list > li {
  display: flex;
  background: var(--panel);
}

.page-faq .hot-card {
  flex: 1;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 12px;
  align-items: start;
  padding: 18px 18px 20px;
  text-decoration: none;
  color: var(--text);
  border-left: 2px solid transparent;
  transition: background .18s ease, border-color .18s ease;
}

.page-faq .hot-card:hover,
.page-faq .hot-card:focus-visible {
  background: #16281f;
  border-left-color: var(--lime);
}

.page-faq .hot-card__idx {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  color: var(--orange);
  letter-spacing: .04em;
}

.page-faq .hot-card__q {
  font-size: 15px;
  line-height: 1.65;
  color: var(--white);
}

.page-faq .hot-card__go {
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.6;
  color: var(--lime);
  transition: transform .18s ease;
}

.page-faq .hot-card:hover .hot-card__go {
  transform: translateX(4px);
}

.page-faq .faq-hot__figure {
  margin: clamp(30px, 5vw, 52px) 0 0;
  border: 1px solid var(--line);
  background: var(--panel);
}

.page-faq .faq-hot__figure .figure__media {
  aspect-ratio: 10 / 7;
}

/* ---------- 分类解答 ---------- */
.page-faq .faq-body {
  position: relative;
  background: radial-gradient(circle at 84% 4%, rgba(198, 255, 61, .06), transparent 44%);
}

.page-faq .faq-layout {
  display: grid;
  gap: clamp(30px, 4vw, 46px);
}

.page-faq .faq-index {
  border: 1px solid var(--line);
  background: var(--panel);
  padding-top: 16px;
}

.page-faq .faq-index__caption {
  margin: 0 16px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--mist);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-index__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line-soft);
  text-decoration: none;
  color: var(--text);
  transition: background .16s ease, color .16s ease;
}

.page-faq .faq-index__item:hover,
.page-faq .faq-index__item:focus-visible {
  background: var(--faq-card-hi);
  color: var(--white);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--silver);
}

.page-faq .faq-index__item:hover .faq-index__num {
  color: var(--lime);
}

.page-faq .faq-index__label {
  font-size: 14px;
  line-height: 1.5;
}

.page-faq .faq-index__count {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--mist);
  white-space: nowrap;
}

.page-faq .faq-index__note {
  margin: 0;
  padding: 14px 16px 16px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .faq-stream {
  display: grid;
  gap: clamp(38px, 6vw, 62px);
  min-width: 0;
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line-strong);
}

.page-faq .faq-group__num {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.9;
  color: var(--orange);
  letter-spacing: .06em;
}

.page-faq .faq-group__head h3 {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(20px, 3vw, 26px);
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--white);
}

.page-faq .faq-group__head p {
  grid-column: 2;
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--mist);
}

/* ---------- 折叠问答 ---------- */
.page-faq .qa {
  border-left: 2px solid transparent;
  border-bottom: 1px solid var(--line-soft);
  background: transparent;
  transition: background .2s ease, border-color .2s ease;
}

.page-faq .qa:hover {
  background: rgba(18, 33, 28, .6);
}

.page-faq .qa[open] {
  background: rgba(18, 33, 28, .88);
  border-left-color: var(--lime);
}

.page-faq .qa__q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 12px 14px;
  align-items: start;
  padding: 18px 16px 18px 16px;
  cursor: pointer;
  list-style: none;
}

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

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

.page-faq .qa__num {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.9;
  color: var(--silver);
  letter-spacing: .04em;
  transition: color .2s ease;
}

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

.page-faq .qa__title {
  font-family: var(--font-head);
  font-size: clamp(15px, 2.1vw, 17px);
  font-weight: 600;
  line-height: 1.62;
  color: var(--white);
}

.page-faq .qa__sign {
  position: relative;
  width: 16px;
  height: 16px;
  margin-top: 5px;
}

.page-faq .qa__sign::before,
.page-faq .qa__sign::after {
  content: "";
  position: absolute;
  background: var(--silver);
  transition: transform .2s ease, background .2s ease;
}

.page-faq .qa__sign::before {
  left: 0;
  top: 7px;
  width: 16px;
  height: 1.5px;
}

.page-faq .qa__sign::after {
  left: 7px;
  top: 0;
  width: 1.5px;
  height: 16px;
}

.page-faq .qa[open] .qa__sign::before {
  background: var(--lime);
}

.page-faq .qa[open] .qa__sign::after {
  transform: scaleY(0);
  background: var(--lime);
}

.page-faq .qa__a {
  display: grid;
  gap: 12px;
  padding: 2px 16px 22px 16px;
  animation: faq-answer-in .3s ease both;
}

@keyframes faq-answer-in {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: none; }
}

.page-faq .qa__a p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--text);
  max-width: 74ch;
}

.page-faq .qa__steps {
  counter-reset: qastep;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
  max-width: 74ch;
}

.page-faq .qa__steps li {
  counter-increment: qastep;
  position: relative;
  padding-left: 38px;
  font-size: 15px;
  line-height: 1.72;
  color: var(--text);
}

.page-faq .qa__steps li::before {
  content: counter(qastep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  min-width: 24px;
  padding: 0 3px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 18px;
  color: var(--lime);
  border: 1px solid var(--faq-line-lime);
  border-radius: 2px;
}

.page-faq .qa__links {
  margin: 2px 0 0;
}

.page-faq .qa__links a {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid var(--faq-line-lime);
  padding-bottom: 2px;
  transition: color .18s ease, border-color .18s ease;
}

.page-faq .qa__links a:hover,
.page-faq .qa__links a:focus-visible {
  color: var(--glow);
  border-color: var(--glow);
}

/* ---------- 联系支持 ---------- */
.page-faq .faq-support__figure {
  margin: 0 0 clamp(28px, 4vw, 44px);
  border: 1px solid var(--line);
  background: var(--panel);
}

.page-faq .faq-support__figure .figure__media {
  aspect-ratio: 10 / 6;
}

.page-faq .faq-support__grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
}

.page-faq .faq-support__lead .lede {
  margin: 0 0 24px;
  max-width: 54ch;
}

.page-faq .faq-support__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-strong);
  min-width: 0;
}

.page-faq .faq-support__list > li {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 6px 16px;
  align-items: center;
  padding: 15px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-support__k {
  grid-column: 1 / -1;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--mist);
}

.page-faq .faq-support__v {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--white);
  overflow-wrap: anywhere;
  min-width: 0;
}

.page-faq .faq-copy {
  justify-self: end;
  padding: 6px 12px;
  background: transparent;
  border: 1px solid var(--faq-line-lime);
  border-radius: 2px;
  color: var(--lime);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.4;
  white-space: nowrap;
  cursor: pointer;
  transition: background .16s ease, color .16s ease, border-color .16s ease;
}

.page-faq .faq-copy:hover,
.page-faq .faq-copy:focus-visible {
  background: var(--lime);
  border-color: var(--lime);
  color: var(--ink);
}

.page-faq .faq-copy.is-done {
  background: var(--orange);
  border-color: var(--orange);
  color: var(--white);
}

/* ---------- 焦点与动效 ---------- */
.page-faq a:focus-visible,
.page-faq summary:focus-visible,
.page-faq button:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa__a { animation: none; }
  .page-faq .hot-card,
  .page-faq .hot-card__go,
  .page-faq .faq-index__item,
  .page-faq .qa__sign::before,
  .page-faq .qa__sign::after { transition: none; }
  .page-faq .hot-card:hover .hot-card__go { transform: none; }
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-hot__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
  }

  .page-faq .faq-support__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: 212px minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 24px;
  }
}

@media (min-width: 1100px) {
  .page-faq .faq-hot__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .qa__q {
    padding-right: 22px;
  }

  .page-faq .qa__a {
    padding-left: 48px;
    padding-right: 22px;
  }
}