.page-faq {
  --faq-rail-w: 292px;
  --faq-line: rgba(199, 210, 229, 0.22);
  --faq-line-soft: rgba(199, 210, 229, 0.12);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-intro {
  position: relative;
  padding-top: clamp(18px, 3.4vw, 32px);
}

.page-faq .faq-intro::before {
  content: "";
  position: absolute;
  inset: -14% 26% 44% -12%;
  background: radial-gradient(closest-side, rgba(109, 74, 255, 0.34), rgba(109, 74, 255, 0) 72%);
  pointer-events: none;
  z-index: 0;
}

.page-faq .faq-intro > .shell {
  position: relative;
  z-index: 1;
}

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

.page-faq .faq-intro__top {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 42px);
  align-items: center;
}

.page-faq .faq-intro__copy {
  min-width: 0;
}

.page-faq .faq-intro h1 {
  margin: 0.45rem 0 0;
  font-size: clamp(2rem, 5.4vw, 3.35rem);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.022em;
  color: var(--white);
  text-shadow: 0 0 32px rgba(109, 74, 255, 0.4);
}

.page-faq .faq-intro__lead {
  margin: 1.05rem 0 0;
  max-width: 48ch;
  font-size: clamp(1rem, 1.5vw, 1.075rem);
  line-height: 1.8;
  color: var(--silver);
}

.page-faq .faq-intro__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 1.6rem;
}

.page-faq .faq-intro__media {
  margin: 0;
  min-width: 0;
}

.page-faq .faq-intro__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

/* ---------- 高频问题 ---------- */
.page-faq .faq-hot {
  margin-top: clamp(32px, 5vw, 56px);
}

.page-faq .faq-hot__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 6px 18px;
  padding-top: 16px;
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-hot__head h2 {
  margin: 0;
  font-size: clamp(1.05rem, 1.9vw, 1.3rem);
  font-weight: 800;
  letter-spacing: -0.012em;
  color: var(--white);
}

.page-faq .faq-hot__head p {
  margin: 0;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--silver);
}

.page-faq .faq-hot__grid {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-faq .faq-hot__grid > li {
  display: flex;
  min-width: 0;
}

.page-faq .faq-hot__card {
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: 10px;
  padding: 15px 15px 17px;
  min-width: 0;
  border: 2px solid var(--faq-line);
  border-radius: 4px;
  background: var(--space-ink);
  color: var(--white);
  text-decoration: none;
  transition: transform 0.18s var(--ease), border-color 0.18s var(--ease), box-shadow 0.18s var(--ease);
}

.page-faq .faq-hot__card:hover,
.page-faq .faq-hot__card:focus-visible {
  transform: translateY(-2px);
  border-color: var(--cyan);
  box-shadow: var(--shadow-hard-sm);
}

.page-faq .faq-hot__card:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-faq .faq-hot__card--focus {
  background: var(--paper);
  border-color: var(--paper);
  color: var(--space-void);
}

.page-faq .faq-hot__card--focus:hover,
.page-faq .faq-hot__card--focus:focus-visible {
  border-color: var(--cyan);
}

.page-faq .faq-hot__card--focus .tag {
  background: var(--space-ink);
  border-color: var(--space-ink);
  color: var(--cyan);
}

.page-faq .faq-hot__q {
  font-size: 0.98rem;
  font-weight: 700;
  line-height: 1.55;
  letter-spacing: -0.005em;
}

/* ---------- 问答控制台 ---------- */
.page-faq .qa-console__head {
  max-width: 64ch;
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-faq .qa-console__head h2 {
  margin: 0.35rem 0 0.65rem;
  font-size: clamp(1.6rem, 3.4vw, 2.35rem);
  font-weight: 900;
  letter-spacing: -0.022em;
  color: var(--white);
}

.page-faq .qa-console__sub {
  margin: 0;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--silver);
}

.page-faq .qa-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3.5vw, 40px);
  align-items: start;
}

/* 左栏 */
.page-faq .qa-rail {
  padding: 18px 16px;
  border: 2px solid var(--faq-line);
  border-radius: 6px;
  background: var(--space-ink);
  box-shadow: var(--shadow-hard-sm);
}

.page-faq .qa-rail__label {
  display: block;
  margin-bottom: 8px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--silver);
}

.page-faq .qa-rail__search input {
  box-sizing: border-box;
  width: 100%;
  padding: 11px 12px;
  font: inherit;
  font-size: 15px;
  color: var(--white);
  background: var(--space-void);
  border: 2px solid var(--faq-line);
  border-radius: 3px;
  outline: none;
  transition: border-color 0.18s var(--ease);
}

.page-faq .qa-rail__search input::placeholder {
  color: rgba(199, 210, 229, 0.55);
}

.page-faq .qa-rail__search input:focus-visible {
  border-color: var(--cyan);
}

.page-faq .qa-rail__nav {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--faq-line-soft);
}

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

.page-faq .qa-rail__nav a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 8px 8px;
  font-size: 15px;
  color: var(--silver);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease), background 0.16s var(--ease);
}

.page-faq .qa-rail__nav a:hover,
.page-faq .qa-rail__nav a:focus-visible {
  color: var(--white);
  border-left-color: var(--cyan);
  background: rgba(57, 214, 196, 0.08);
}

.page-faq .qa-rail__nav a:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 1px;
}

.page-faq .qa-rail__idx {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--nebula);
}

.page-faq .qa-rail__note {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--faq-line-soft);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--silver);
}

.page-faq .qa-rail__note a {
  color: var(--cyan);
  text-decoration: none;
}

.page-faq .qa-rail__note a:hover,
.page-faq .qa-rail__note a:focus-visible {
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* 右栏 */
.page-faq .qa-stream {
  min-width: 0;
}

.page-faq .filter-empty {
  margin: 0 0 18px;
  padding: 12px 14px;
  border: 2px dashed var(--faq-line);
  border-radius: 4px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--silver);
}

.page-faq .qa-group {
  scroll-margin-top: calc(var(--header-h) + 26px);
}

.page-faq .qa-group + .qa-group {
  margin-top: clamp(30px, 4.5vw, 48px);
  padding-top: clamp(22px, 3.6vw, 34px);
  border-top: 1px solid var(--faq-line-soft);
}

.page-faq .qa-group__title {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 0 0 16px;
  font-size: clamp(1.12rem, 2.1vw, 1.42rem);
  font-weight: 900;
  letter-spacing: -0.012em;
  color: var(--white);
}

.page-faq .qa-group__idx {
  flex: none;
  padding: 2px 7px;
  font-family: var(--mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--space-void);
  background: var(--cyan);
  border-radius: 2px;
}

.page-faq .qa-group__media {
  margin: 0 0 18px;
}

.page-faq .qa-group__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

.page-faq .qa-group__items {
  display: grid;
  gap: 10px;
  padding-left: 14px;
  border-left: 1px dashed var(--faq-line);
}

/* 问答条目 */
.page-faq .qa-item {
  position: relative;
  min-width: 0;
  border: 2px solid var(--faq-line-soft);
  border-radius: 4px;
  background: rgba(14, 19, 40, 0.72);
  transition: border-color 0.18s var(--ease), background 0.18s var(--ease);
}

.page-faq .qa-item::before {
  content: "";
  position: absolute;
  left: -20px;
  top: 22px;
  box-sizing: content-box;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--space-void);
  border: 2px solid var(--silver);
}

.page-faq .qa-item:hover {
  border-color: var(--faq-line);
}

.page-faq .qa-item[open] {
  border-color: var(--nebula);
  background: var(--space-ink);
}

.page-faq .qa-item[open]::before {
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-faq .qa-item summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  padding: 13px 15px;
  list-style: none;
  cursor: pointer;
  font-size: 0.98rem;
  font-weight: 700;
  line-height: 1.6;
  color: var(--white);
  border-radius: 2px;
}

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

.page-faq .qa-item summary::marker {
  content: "";
}

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

.page-faq .qa-item summary::after {
  content: "";
  flex: none;
  width: 9px;
  height: 9px;
  margin-top: 8px;
  border-right: 2px solid var(--cyan);
  border-bottom: 2px solid var(--cyan);
  transform: rotate(45deg);
  transition: transform 0.2s var(--ease);
}

.page-faq .qa-item[open] summary::after {
  transform: rotate(-135deg);
  margin-top: 11px;
}

.page-faq .qa-item__body {
  padding: 14px 15px 18px;
  border-top: 1px solid var(--faq-line-soft);
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--silver);
}

.page-faq .qa-item__body p {
  margin: 0 0 12px;
}

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

.page-faq .qa-item__body a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .step-list {
  list-style: none;
  margin: 0 0 14px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .step-list li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
}

.page-faq .step-list__n {
  display: block;
  padding: 0 2px;
  font-family: var(--mono);
  font-size: 11.5px;
  line-height: 20px;
  text-align: center;
  color: var(--cyan);
  border: 1px solid var(--faq-line);
  border-radius: 2px;
}

.page-faq .check-list {
  list-style: none;
  margin: 0 0 14px;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .check-list li {
  position: relative;
  padding-left: 20px;
}

.page-faq .check-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 8px;
  width: 8px;
  height: 8px;
  border: 1.5px solid var(--cyan);
  border-radius: 1px;
}

.page-faq .qa-item__copy {
  margin-top: 4px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
}

/* ---------- 渠道面板 ---------- */
.page-faq .faq-support__panel {
  padding: clamp(20px, 3.4vw, 34px);
}

.page-faq .faq-support__head {
  max-width: 60ch;
}

.page-faq .faq-support__head h2 {
  margin: 0.35rem 0 0.6rem;
  font-size: clamp(1.4rem, 2.8vw, 2rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-faq .faq-support__head p:last-child {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--silver);
}

.page-faq .faq-support__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: 22px;
}

.page-faq .faq-support__cell {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
  padding: 16px;
  border: 2px solid var(--faq-line);
  border-radius: 4px;
  background: var(--space-void);
}

.page-faq .faq-support__k {
  margin: 0;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-support__v {
  margin: 0;
  font-family: var(--mono);
  font-size: clamp(0.92rem, 1.7vw, 1.08rem);
  line-height: 1.4;
  color: var(--white);
  word-break: break-word;
}

.page-faq .faq-support__d {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--silver);
}

.page-faq .faq-support__copy {
  align-self: flex-start;
  margin-top: 2px;
  font-size: 13px;
}

.page-faq .faq-support__order {
  margin: 20px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--faq-line-soft);
  font-size: 14px;
  line-height: 1.78;
  color: var(--silver);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-hot__grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }

  .page-faq .faq-hot__grid > li:nth-child(1) {
    grid-column: span 7;
  }

  .page-faq .faq-hot__grid > li:nth-child(2) {
    grid-column: span 5;
  }

  .page-faq .faq-hot__grid > li:nth-child(n + 3) {
    grid-column: span 3;
  }

  .page-faq .faq-support__grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }

  .page-faq .faq-support__cell:nth-child(1) {
    grid-column: span 5;
  }

  .page-faq .faq-support__cell:nth-child(2) {
    grid-column: span 4;
  }

  .page-faq .faq-support__cell:nth-child(3) {
    grid-column: span 3;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-intro__top {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }
}

@media (min-width: 960px) {
  .page-faq .qa-body {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: clamp(28px, 3.6vw, 48px);
  }

  .page-faq .qa-rail {
    position: sticky;
    top: calc(var(--header-h) + 22px);
  }

  .page-faq .qa-group__media {
    max-width: 460px;
  }
}

@media (min-width: 1200px) {
  .page-faq {
    --faq-rail-w: 312px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }

  .page-faq .faq-hot__card:hover,
  .page-faq .faq-hot__card:focus-visible {
    transform: none;
  }
}