.page-faq {
  --faq-index-bg: rgba(11, 27, 58, 0.5);
  --faq-panel-bg: rgba(5, 13, 26, 0.7);
  background: var(--navy-900);
  color: var(--text-main);
  font-family: var(--font-sans);
  line-height: 1.6;
}

/* Hero 区 */
.page-faq .faq-hero {
  position: relative;
  min-height: 360px;
  display: flex;
  align-items: center;
  background: var(--navy-700);
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}
.page-faq .faq-hero__art {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.page-faq .faq-hero__art img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.22;
}
.page-faq .faq-hero__veil {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(11, 27, 58, 0.86) 0%, rgba(5, 13, 26, 0.92) 100%);
}
.page-faq .faq-hero__container {
  position: relative;
  z-index: 1;
  padding: 40px 24px;
}
.page-faq .faq-hero .breadcrumb {
  margin-bottom: 30px;
}
.page-faq .faq-hero .eyebrow {
  color: var(--accent);
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: 0.04em;
}
.page-faq .faq-hero h1 {
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(28px, 5vw, 56px);
  line-height: 1.12;
  margin: 14px 0 16px;
  max-width: 820px;
}
.page-faq .faq-hero .page-intro {
  font-size: 16px;
  color: var(--text-muted);
  max-width: 720px;
  margin: 0;
}

/* 终端帮助系统主区域 */
.page-faq .faq-terminal {
  padding: 48px 0 72px;
  background-image:
    linear-gradient(rgba(245, 247, 250, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(245, 247, 250, 0.03) 1px, transparent 1px);
  background-size: 36px 36px;
}
.page-faq .faq-terminal__frame {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--faq-panel-bg);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.3);
  overflow: hidden;
}
.page-faq .faq-terminal__bar {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
  background: var(--faq-index-bg);
}
.page-faq .faq-terminal__dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--red);
  flex-shrink: 0;
}
.page-faq .faq-terminal__dot--green {
  background: var(--accent);
}
.page-faq .faq-terminal__dot--blue {
  background: var(--data);
}
.page-faq .faq-terminal__title {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-faint);
  margin-left: 8px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* 左侧索引 */
.page-faq .faq-index {
  padding: 20px;
  border-bottom: 1px solid var(--line);
  background: var(--faq-index-bg);
}
.page-faq .faq-index__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}
.page-faq .faq-index__prompt {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--accent);
}
.page-faq .faq-index__label {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-faint);
  text-transform: uppercase;
}
.page-faq .faq-index__nav {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}
.page-faq .faq-index__row {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--text-main);
  text-decoration: none;
  background: rgba(5, 13, 26, 0.4);
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease);
}
.page-faq .faq-index__row:hover,
.page-faq .faq-index__row:focus-visible {
  border-color: var(--line-accent);
  background: var(--accent-soft);
  outline: none;
}
.page-faq .faq-index__code {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--accent);
}
.page-faq .faq-index__name {
  font-size: 15px;
  font-weight: 700;
}
.page-faq .faq-index__sub {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-faint);
  line-height: 1.3;
}
.page-faq .faq-index__count {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
}
.page-faq .faq-index__foot {
  display: none;
}

/* 标签页 */
.page-faq .faq-tabs {
  min-width: 0;
}
.page-faq .faq-tabs .tablist {
  display: flex;
  gap: 4px;
  padding: 12px 16px 0;
  border-bottom: 1px solid var(--line);
  background: rgba(11, 27, 58, 0.6);
  overflow-x: auto;
  scrollbar-width: none;
}
.page-faq .faq-tabs .tablist::-webkit-scrollbar {
  display: none;
}
.page-faq .faq-tabs .tab {
  flex: 1 1 0;
  min-width: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 10px 8px;
  border: 1px solid transparent;
  border-bottom: none;
  border-radius: 8px 8px 0 0;
  background: transparent;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: color 0.2s var(--ease), background 0.2s var(--ease);
}
.page-faq .faq-tabs .tab:hover {
  color: var(--text-main);
}
.page-faq .faq-tabs .tab[aria-selected="true"] {
  color: var(--accent);
  background: rgba(0, 230, 138, 0.1);
  border-color: var(--line);
  border-bottom-color: transparent;
}
.page-faq .faq-tabs .tab:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}
.page-faq .faq-tab__prompt {
  color: var(--accent);
  font-weight: 700;
}
.page-faq .faq-tabs .tabpanel {
  padding: 16px;
}
.page-faq .faq-tabs .tabpanel[hidden] {
  display: none;
}

/* 面板头 */
.page-faq .faq-panel__head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-faint);
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--line);
}
.page-faq .faq-panel__path::before {
  content: "$ ";
  color: var(--accent);
}
.page-faq .faq-panel__hint {
  display: none;
}

/* 折叠面板 */
.page-faq .faq-item {
  margin: 0 0 12px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--line-strong);
  border-radius: 8px;
  background: rgba(11, 27, 58, 0.35);
  overflow: hidden;
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease);
}
.page-faq .faq-item[open] {
  border-left-color: var(--accent);
  background: rgba(0, 230, 138, 0.04);
}
.page-faq .faq-item summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
  font-weight: 600;
  font-size: 15px;
  color: var(--text-main);
}
.page-faq .faq-item summary::-webkit-details-marker {
  display: none;
}
.page-faq .faq-item summary:hover {
  background: rgba(245, 247, 250, 0.03);
}
.page-faq .faq-item summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}
.page-faq .faq-item__idx {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 4px;
  padding: 3px 6px;
  white-space: nowrap;
}
.page-faq .faq-item__q {
  flex: 1;
  min-width: 0;
}
.page-faq .faq-item summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  font-weight: 700;
  color: var(--text-faint);
  transition: color 0.2s var(--ease);
}
.page-faq .faq-item[open] summary::after {
  content: "–";
  color: var(--accent);
}
.page-faq .faq-item__a {
  padding: 0 16px 14px 48px;
  font-size: 15px;
  color: var(--text-muted);
}
.page-faq .faq-item__a p {
  margin: 8px 0;
}
.page-faq .faq-item__tip {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent);
  background: var(--accent-soft);
  border-left: 2px solid var(--accent);
  padding: 8px 10px;
}

/* 右侧设备示意图 */
.page-faq .faq-device {
  display: none;
  padding: 16px;
  border-left: 1px solid var(--line);
  background: rgba(11, 27, 58, 0.35);
  align-self: start;
}
.page-faq .faq-device img {
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  display: block;
}
.page-faq .faq-device__label {
  display: block;
  margin-top: 10px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-faint);
}

/* 热门问答 */
.page-faq .faq-hot {
  padding: 56px 0 72px;
  background:
    radial-gradient(circle at 85% 10%, rgba(0, 230, 138, 0.08) 0%, transparent 42%),
    var(--navy-900);
}
.page-faq .faq-hot__head {
  margin-bottom: 24px;
}
.page-faq .faq-hot .eyebrow {
  font-family: var(--font-mono);
  color: var(--accent);
  font-weight: 700;
}
.page-faq .faq-hot h2 {
  font-size: clamp(24px, 4vw, 36px);
  font-weight: 900;
  margin: 8px 0 8px;
}
.page-faq .faq-hot__lead {
  color: var(--text-muted);
  margin: 0;
}
.page-faq .faq-hot__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 24px;
}
.page-faq .faq-hot__card {
  position: relative;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 22px;
  background: linear-gradient(135deg, rgba(11, 27, 58, 0.86) 0%, rgba(5, 13, 26, 0.9) 100%);
  transition: border-color 0.2s var(--ease), transform 0.2s var(--ease);
}
.page-faq .faq-hot__card:hover {
  border-color: var(--line-accent);
  transform: translateY(-2px);
}
.page-faq .faq-hot__top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}
.page-faq .faq-hot__num {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--accent);
}
.page-faq .faq-hot__card h3 {
  font-size: 18px;
  font-weight: 700;
  margin: 0 0 8px;
}
.page-faq .faq-hot__card p {
  margin: 0;
  font-size: 15px;
  color: var(--text-muted);
}

/* 底部联系支持 */
.page-faq .faq-support {
  padding: 8px 0 80px;
}
.page-faq .faq-support__box {
  display: flex;
  flex-direction: column;
  gap: 20px;
  align-items: stretch;
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent);
  border-radius: 12px;
  padding: 28px 24px;
  background: linear-gradient(135deg, rgba(11, 27, 58, 0.95), rgba(5, 13, 26, 0.92));
}
.page-faq .faq-support .eyebrow {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--accent);
}
.page-faq .faq-support h2 {
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 900;
  margin: 6px 0 8px;
}
.page-faq .faq-support p {
  color: var(--text-muted);
  font-size: 15px;
  margin: 0;
  max-width: 560px;
}
.page-faq .faq-support__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* 移动端小屏细节 */
@media (max-width: 479px) {
  .page-faq .faq-tabs .tab {
    font-size: 13px;
    padding: 9px 6px;
  }
}
@media (max-width: 767px) {
  .page-faq .faq-index__sub,
  .page-faq .faq-index__count {
    display: none;
  }
}

/* 平板及以上 */
@media (min-width: 768px) {
  .page-faq .faq-hero {
    min-height: 400px;
  }
  .page-faq .faq-panel__hint {
    display: inline;
  }
  .page-faq .faq-hot__grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .page-faq .faq-support__box {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    padding: 32px 36px;
  }
  .page-faq .faq-support__links {
    justify-content: flex-end;
  }
}

/* 桌面端：终端三栏布局 */
@media (min-width: 1024px) {
  .page-faq .faq-terminal__frame {
    grid-template-columns: 250px minmax(0, 1fr);
  }
  .page-faq .faq-index {
    grid-column: 1;
    grid-row: 2;
    border-right: 1px solid var(--line);
    border-bottom: none;
  }
  .page-faq .faq-tabs {
    grid-column: 2;
    grid-row: 2;
  }
  .page-faq .faq-index__nav {
    display: flex;
    flex-direction: column;
  }
  .page-faq .faq-index__row {
    flex-direction: row;
    align-items: center;
    gap: 12px;
  }
  .page-faq .faq-index__body {
    flex: 1;
    min-width: 0;
  }
  .page-faq .faq-index__count {
    display: inline;
    margin-top: 0;
    font-size: 12px;
  }
  .page-faq .faq-index__foot {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 8px;
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--text-faint);
    border-top: 1px solid var(--line);
    margin-top: 16px;
    padding-top: 12px;
  }
  .page-faq .faq-index__cmd::before {
    content: "$ ";
    color: var(--accent);
  }
}

/* 大屏：加入设备列 */
@media (min-width: 1200px) {
  .page-faq .faq-terminal__frame {
    grid-template-columns: 250px minmax(0, 1fr) 210px;
  }
  .page-faq .faq-device {
    display: block;
    grid-column: 3;
    grid-row: 2;
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }
}