.page-faq {
  background: var(--ink-night);
  color: var(--paper);
}

.page-faq .breadcrumb {
  padding-top: clamp(16px, 3vw, 28px);
}

/* ===== 首屏 ===== */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(26px, 5vw, 64px) 0 clamp(30px, 6vw, 76px);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
  isolation: isolate;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse at 82% 12%, rgba(255, 90, 42, 0.20), transparent 55%),
    radial-gradient(ellipse at 6% 94%, rgba(43, 227, 242, 0.12), transparent 58%),
    linear-gradient(180deg, var(--night-blue), var(--ink-night));
  pointer-events: none;
}

.page-faq .faq-hero__kicker {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0 0 20px;
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mist-cyan);
}

.page-faq .faq-hero__kicker .mono {
  color: var(--electric-cyan);
  border: 1px solid rgba(43, 227, 242, 0.42);
  padding: 3px 9px;
  border-radius: var(--radius);
  letter-spacing: 0.1em;
}

.page-faq .faq-hero__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--lime-signal);
  box-shadow: 0 0 10px var(--lime-signal);
}

.page-faq .faq-hero__title {
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(2.5rem, 8.4vw, 5.6rem);
  line-height: 0.96;
  letter-spacing: -0.022em;
  margin: 0 0 20px;
  color: var(--paper);
  text-wrap: balance;
}

.page-faq .faq-hero__lede {
  max-width: 48ch;
  margin: 0 0 26px;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.82;
  color: var(--mist-cyan);
}

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

.page-faq .faq-hero__tags li {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.05em;
  color: var(--paper);
  border: 1px solid var(--line-strong);
  background: rgba(18, 54, 44, 0.55);
  padding: 6px 11px;
  border-radius: var(--radius);
}

/* ===== 版本号拆解 ===== */
.page-faq .faq-version {
  position: relative;
  padding: clamp(38px, 7vw, 86px) 0;
  background: linear-gradient(180deg, var(--ink-night), var(--night-blue));
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-version__head {
  max-width: 64ch;
  margin-bottom: clamp(24px, 4vw, 42px);
}

.page-faq .faq-version__head h2 {
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(1.85rem, 4.4vw, 3rem);
  line-height: 1.1;
  letter-spacing: -0.015em;
  margin: 10px 0 14px;
}

.page-faq .faq-version__head p {
  margin: 0;
  color: var(--mist-cyan);
  line-height: 1.82;
}

.page-faq .faq-version__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 3vw, 32px);
}

.page-faq .faq-version__media,
.page-faq .faq-block__figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--moss-panel);
  overflow: hidden;
}

.page-faq .faq-version__media .media__frame {
  aspect-ratio: 12 / 7;
}

.page-faq .faq-block__figure .media__frame {
  aspect-ratio: 10 / 7;
}

.page-faq .media__frame {
  display: block;
  margin: 0;
  overflow: hidden;
}

.page-faq .media__frame img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

.page-faq .media__caption {
  margin: 0;
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  background: rgba(6, 21, 18, 0.55);
  color: var(--mist-cyan);
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  line-height: 1.6;
}

.page-faq .faq-version__segments {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-faq .faq-version__segment {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(18, 54, 44, 0.88), rgba(7, 26, 43, 0.72));
  transition: transform 0.24s var(--ease), border-color 0.24s var(--ease);
}

.page-faq .faq-version__segment:hover {
  transform: translateY(-2px);
  border-color: var(--line-strong);
}

.page-faq .faq-version__segment .seg-num {
  font-size: clamp(1.7rem, 4.4vw, 2.3rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
  min-width: 1.4em;
  color: var(--electric-cyan);
}

.page-faq .faq-version__segment--master .seg-num {
  color: var(--signal-orange);
}

.page-faq .faq-version__segment--feature .seg-num {
  color: var(--electric-cyan);
}

.page-faq .faq-version__segment--revise .seg-num {
  color: var(--lime-signal);
}

.page-faq .seg-content h3 {
  margin: 0 0 6px;
  font-size: 1.02rem;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-faq .seg-content p {
  margin: 0 0 10px;
  font-size: 14.5px;
  line-height: 1.74;
  color: var(--mist-cyan);
}

.page-faq .seg-content .tag {
  font-size: 11px;
}

/* ===== 问答主体 ===== */
.page-faq .faq-body {
  padding: clamp(32px, 6vw, 76px) 0;
  background:
    radial-gradient(ellipse at 96% 4%, rgba(43, 227, 242, 0.07), transparent 52%),
    linear-gradient(180deg, var(--night-blue), var(--ink-night) 55%);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-body__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 40px);
}

.page-faq .faq-rail__kicker {
  margin: 0 0 6px;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--electric-cyan);
}

.page-faq .faq-rail__title {
  font-family: var(--display);
  font-weight: 800;
  font-size: 1.45rem;
  letter-spacing: -0.01em;
  margin: 0 0 12px;
}

.page-faq .faq-rail__nav {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 0 0 8px;
  margin: 0;
  scrollbar-width: thin;
}

.page-faq .faq-rail__nav a {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  padding: 8px 13px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(18, 54, 44, 0.72);
  color: var(--mist-cyan);
  text-decoration: none;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  white-space: nowrap;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

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

.page-faq .faq-stream {
  display: grid;
  gap: clamp(30px, 5vw, 58px);
  min-width: 0;
}

.page-faq .faq-block {
  min-width: 0;
  scroll-margin-top: 96px;
}

.page-faq .faq-block__head {
  margin-bottom: 18px;
}

.page-faq .faq-block__head h2 {
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(1.5rem, 3.8vw, 2.2rem);
  line-height: 1.14;
  letter-spacing: -0.012em;
  margin: 8px 0 12px;
}

.page-faq .faq-block__intro {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist-cyan);
}

/* 终端切换 */
.page-faq .faq-tabs {
  display: grid;
  gap: 12px;
}

.page-faq .faq-tabs__list {
  display: flex;
  gap: 4px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-tabs__tab {
  appearance: none;
  border: 1px solid var(--line);
  border-bottom: 2px solid transparent;
  border-radius: var(--radius) var(--radius) 0 0;
  background: transparent;
  color: var(--mist-cyan);
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  padding: 10px 18px;
  cursor: pointer;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-faq .faq-tabs__tab:hover,
.page-faq .faq-tabs__tab:focus-visible {
  color: var(--electric-cyan);
  outline: none;
}

.page-faq .faq-tabs__tab[aria-selected="true"] {
  color: var(--paper);
  border-bottom-color: var(--signal-orange);
  background: rgba(18, 54, 44, 0.66);
}

.page-faq .faq-tabs__panel {
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-left: 2px solid rgba(43, 227, 242, 0.42);
  border-radius: var(--radius);
  background: rgba(18, 54, 44, 0.52);
}

.page-faq .faq-tabs__panel:focus-visible {
  outline: 1px solid var(--electric-cyan);
  outline-offset: 3px;
}

.page-faq .faq-tabs__label {
  margin: 0 0 12px;
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--electric-cyan);
}

/* 检查清单 */
.page-faq .check-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 11px;
}

.page-faq .check-list li {
  display: grid;
  grid-template-columns: 18px minmax(0, 1fr);
  gap: 10px;
  font-size: 14.5px;
  line-height: 1.76;
  color: var(--mist-cyan);
}

.page-faq .check-list li::before {
  content: "";
  width: 8px;
  height: 8px;
  margin-top: 0.62em;
  border: 1px solid var(--electric-cyan);
  border-radius: 50%;
  background: rgba(43, 227, 242, 0.2);
}

.page-faq .check-list--ordered li {
  grid-template-columns: 48px minmax(0, 1fr);
  align-items: start;
  padding: 12px 0;
  border-bottom: 1px dashed var(--line);
}

.page-faq .check-list--ordered li::before {
  display: none;
}

.page-faq .check-list__tag {
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--signal-orange);
  padding-top: 3px;
}

/* 折叠问答 */
.page-faq .faq-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(7, 26, 43, 0.6);
  transition: border-color 0.24s var(--ease), background 0.24s var(--ease);
}

.page-faq .faq-item + .faq-item {
  margin-top: 10px;
}

.page-faq .faq-item[open] {
  border-color: rgba(43, 227, 242, 0.44);
  background: rgba(18, 54, 44, 0.7);
}

.page-faq .faq-item__summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) 16px;
  align-items: center;
  gap: 14px;
  padding: 15px 18px;
  cursor: pointer;
  list-style: none;
  font-size: 15px;
  line-height: 1.5;
  color: var(--paper);
}

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

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

.page-faq .faq-item__summary:focus-visible {
  outline: 1px solid var(--electric-cyan);
  outline-offset: -3px;
}

.page-faq .faq-item__num {
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--electric-cyan);
}

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

.page-faq .faq-item__toggle {
  width: 9px;
  height: 9px;
  border-right: 1px solid var(--signal-orange);
  border-bottom: 1px solid var(--signal-orange);
  transform: rotate(45deg);
  transition: transform 0.22s var(--ease);
}

.page-faq .faq-item[open] .faq-item__toggle {
  transform: rotate(-135deg);
}

.page-faq .faq-item__body {
  padding: 0 18px 18px 58px;
  color: var(--mist-cyan);
  font-size: 14.5px;
  line-height: 1.82;
}

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

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

.page-faq .faq-item__body ul {
  margin: 4px 0 0;
  padding-left: 1.15em;
  display: grid;
  gap: 8px;
}

.page-faq .faq-item__body strong {
  color: var(--paper);
  font-weight: 600;
}

.page-faq .faq-item__body a {
  color: var(--electric-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 227, 242, 0.4);
}

.page-faq .faq-item__body a:hover {
  border-bottom-color: var(--signal-orange);
}

/* ===== 仍需帮助 ===== */
.page-faq .faq-help {
  padding: clamp(38px, 6vw, 80px) 0 clamp(46px, 7vw, 96px);
  background: var(--ink-night);
}

.page-faq .faq-help__panel {
  display: grid;
  gap: 26px;
  padding: clamp(24px, 4vw, 46px);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background:
    linear-gradient(120deg, rgba(255, 90, 42, 0.16), transparent 56%),
    linear-gradient(180deg, var(--moss-panel), var(--night-blue));
  overflow: hidden;
}

.page-faq .faq-help__title {
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(1.6rem, 3.9vw, 2.4rem);
  line-height: 1.12;
  letter-spacing: -0.012em;
  margin: 10px 0 12px;
}

.page-faq .faq-help__lede {
  margin: 0;
  max-width: 46ch;
  color: var(--mist-cyan);
  line-height: 1.8;
  font-size: 15px;
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.page-faq .faq-help__contact {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  align-content: start;
}

.page-faq .faq-help__contact li {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--line);
  font-size: 14px;
  line-height: 1.66;
  color: var(--paper);
  word-break: break-word;
}

.page-faq .faq-help__contact li:last-child {
  border-bottom: none;
}

.page-faq .faq-help__contact .mono {
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--electric-cyan);
  padding-top: 4px;
}

/* ===== 响应式 ===== */
@media (min-width: 720px) {
  .page-faq .faq-body__grid {
    gap: 32px;
  }
  .page-faq .faq-help__panel {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-version__grid {
    grid-template-columns: minmax(0, 1.28fr) minmax(0, 1fr);
    align-items: start;
  }
  .page-faq .faq-tabs__panel {
    padding: 22px 24px;
  }
  .page-faq .faq-item__body {
    padding-left: 64px;
    max-width: 68ch;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-body__grid {
    grid-template-columns: 208px minmax(0, 1fr);
    align-items: start;
  }
  .page-faq .faq-rail {
    position: sticky;
    top: 96px;
    padding: 20px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: rgba(7, 26, 43, 0.62);
    backdrop-filter: blur(8px);
  }
  .page-faq .faq-rail__nav {
    display: block;
    overflow: visible;
    padding: 0;
    margin: 14px 0 0;
  }
  .page-faq .faq-rail__nav a {
    display: block;
    padding: 10px 0;
    border: none;
    border-bottom: 1px dashed var(--line);
    border-radius: 0;
    background: none;
    font-size: 12.5px;
  }
  .page-faq .faq-rail__nav a:last-child {
    border-bottom: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-version__segment,
  .page-faq .faq-item,
  .page-faq .faq-item__toggle,
  .page-faq .faq-rail__nav a {
    transition: none;
  }
  .page-faq .faq-version__segment:hover {
    transform: none;
  }
}