.page-faq {
  background: var(--space-blue);
  color: var(--mist);
  font-family: var(--font-body);
  overflow-x: clip;
}

.page-faq h1,
.page-faq h2,
.page-faq h3 {
  font-family: var(--font-display);
  color: var(--mist);
  margin: 0;
  line-height: 1.14;
}

.page-faq p {
  margin: 0 0 .9rem;
  line-height: 1.8;
  color: var(--silver);
}

.page-faq a {
  transition: color .18s ease;
}

/* 首屏 */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(1.4rem, 4vw, 2.5rem) 0 0;
  background:
    radial-gradient(120% 100% at 8% 0%, rgba(18, 57, 92, .88) 0%, rgba(7, 20, 38, 0) 64%),
    linear-gradient(180deg, var(--night-blue) 0%, var(--space-blue) 84%);
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 3px;
  background: linear-gradient(90deg, var(--lime) 0%, var(--lime) 30%, var(--ember) 70%, var(--ember) 100%);
  opacity: .5;
}

.page-faq .crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .05em;
  color: var(--silver);
  margin-bottom: clamp(1rem, 3vw, 1.75rem);
}

.page-faq .crumbs a {
  color: var(--aqua);
  text-decoration: none;
}

.page-faq .crumbs a:hover,
.page-faq .crumbs a:focus-visible {
  color: var(--lime);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: 1.35rem;
}

.page-faq .eyebrow {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--ember);
  margin: 0 0 .7rem;
}

.page-faq h1 {
  font-size: clamp(2.05rem, 7vw, 3.9rem);
  font-weight: 800;
  letter-spacing: -.03em;
  margin: 0 0 1rem;
}

.page-faq h1 em {
  font-style: normal;
  color: var(--lime);
  background: linear-gradient(100deg, rgba(201, 255, 59, .16), rgba(201, 255, 59, 0) 72%);
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
}

.page-faq .faq-hero__lede {
  max-width: 46ch;
  font-size: clamp(.98rem, 1.6vw, 1.1rem);
  line-height: 1.85;
  color: var(--silver);
  margin: 0;
}

.page-faq .faq-hero__note {
  padding: 1.15rem 1.25rem;
  border: 1px solid var(--line);
  background: var(--glass);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  clip-path: polygon(0 0, calc(100% - var(--cut-lg)) 0, 100% var(--cut-lg), 100% 100%, 0 100%);
}

.page-faq .faq-hero__note-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: .95rem;
  color: var(--lime);
  margin-bottom: .55rem;
}

.page-faq .faq-hero__note p {
  font-size: .86rem;
  line-height: 1.7;
  margin-bottom: .5rem;
}

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

.page-faq .faq-hero__mail {
  font-family: var(--font-mono);
  color: var(--aqua);
  word-break: break-all;
}

.page-faq .scene-tabs {
  display: flex;
  gap: .5rem;
  overflow-x: auto;
  list-style: none;
  margin: 0;
  padding: 1.5rem 0 1.6rem;
  scrollbar-width: thin;
  scrollbar-color: var(--tactical) transparent;
}

.page-faq .scene-tabs li {
  flex: 0 0 auto;
}

.page-faq .scene-tabs a {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  padding: .5rem .95rem;
  border: 1px solid var(--line);
  color: var(--silver);
  text-decoration: none;
  font-size: .84rem;
  white-space: nowrap;
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 0 100%);
  transition: color .18s ease, border-color .18s ease, background .18s ease;
}

.page-faq .scene-tabs a span {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .06em;
  color: var(--lime);
}

.page-faq .scene-tabs a:hover,
.page-faq .scene-tabs a:focus-visible {
  color: var(--mist);
  border-color: var(--line-live);
  background: rgba(201, 255, 59, .07);
}

/* 主体两栏 */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.75rem;
  padding-top: clamp(1.75rem, 4vw, 3rem);
  padding-bottom: clamp(2.5rem, 6vw, 4.5rem);
}

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

.page-faq .tree-rail {
  display: none;
}

.page-faq .tree-rail__title {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--ember);
  margin: 0;
}

.page-faq .tree-rail__list {
  position: relative;
  list-style: none;
  margin: 1rem 0 0;
  padding: 0 0 0 1.4rem;
}

.page-faq .tree-rail__list::before {
  content: "";
  position: absolute;
  left: 5px;
  top: .7rem;
  bottom: .7rem;
  border-left: 1px dashed var(--line-live);
}

.page-faq .tree-rail__list li {
  position: relative;
  padding: .5rem 0;
}

.page-faq .tree-rail__list li::before {
  content: "";
  position: absolute;
  left: -1.4rem;
  top: 1rem;
  width: 9px;
  height: 9px;
  background: var(--space-blue);
  border: 1.5px solid var(--lime);
  transform: rotate(45deg);
}

.page-faq .tree-rail__list a {
  display: block;
  color: var(--silver);
  text-decoration: none;
  font-size: .87rem;
  line-height: 1.5;
}

.page-faq .tree-rail__list a:hover,
.page-faq .tree-rail__list a:focus-visible {
  color: var(--lime);
}

/* 章节 */
.page-faq .faq-chapter {
  scroll-margin-top: 5.5rem;
}

.page-faq .faq-chapter + .faq-chapter {
  margin-top: clamp(2.25rem, 5vw, 3.5rem);
  padding-top: clamp(2rem, 5vw, 3rem);
  border-top: 1px solid var(--line-soft);
}

.page-faq .chapter-head {
  display: flex;
  align-items: baseline;
  gap: .8rem;
  margin-bottom: 1rem;
}

.page-faq .chapter-head__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .14em;
  color: var(--lime);
}

.page-faq h2 {
  font-size: clamp(1.45rem, 3.6vw, 2.1rem);
  font-weight: 800;
  letter-spacing: -.015em;
}

.page-faq .faq-chapter__intro {
  max-width: 56ch;
  color: var(--silver);
  margin-bottom: 1.4rem;
}

.page-faq .faq-chapter__intro a {
  color: var(--aqua);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-chapter__intro a:hover {
  color: var(--lime);
}

/* 步骤列表 */
.page-faq .step-list {
  list-style: none;
  margin: 1.4rem 0 0;
  padding: 0;
}

.page-faq .step-list li {
  position: relative;
  padding: 0 0 1.5rem 2.9rem;
}

.page-faq .step-list li:last-child {
  padding-bottom: 0;
}

.page-faq .step-list li:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 13px;
  top: 2.2rem;
  bottom: .2rem;
  width: 1px;
  background: linear-gradient(180deg, rgba(201, 255, 59, .55), rgba(201, 255, 59, .06));
}

.page-faq .step-list__num {
  position: absolute;
  left: 0;
  top: 0;
  width: 27px;
  height: 27px;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: .72rem;
  font-weight: 700;
  color: var(--space-blue);
  background: var(--lime);
  clip-path: polygon(0 0, 100% 0, 100% 68%, 68% 100%, 0 100%);
}

.page-faq .step-list h3 {
  font-size: 1.02rem;
  margin: 0 0 .35rem;
  padding-top: .12rem;
}

.page-faq .step-list p {
  margin: 0;
  font-size: .93rem;
  line-height: 1.75;
  color: var(--silver);
}

/* 视图对比表 */
.page-faq .view-table__wrap {
  margin: 1.25rem 0 0;
  overflow-x: auto;
  border: 1px solid var(--line);
  background: rgba(12, 32, 56, .6);
  scrollbar-width: thin;
  scrollbar-color: var(--tactical) transparent;
}

.page-faq .view-table {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
  font-size: .9rem;
  text-align: left;
}

.page-faq .view-table thead th {
  padding: .75rem 1rem;
  font-family: var(--font-mono);
  font-size: .7rem;
  font-weight: 600;
  letter-spacing: .12em;
  color: var(--aqua);
  background: rgba(18, 57, 92, .66);
  white-space: nowrap;
}

.page-faq .view-table tbody th {
  padding: .95rem 1rem;
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--mist);
  white-space: nowrap;
  border-top: 1px solid var(--line-soft);
}

.page-faq .view-table td {
  padding: .95rem 1rem;
  line-height: 1.6;
  color: var(--silver);
  border-top: 1px solid var(--line-soft);
}

.page-faq .view-table tbody tr:hover td,
.page-faq .view-table tbody tr:hover th {
  background: rgba(201, 255, 59, .05);
}

/* 图片 */
.page-faq .faq-figure {
  margin: 1.5rem 0 0;
  border: 1px solid var(--line);
  background: var(--night-blue);
  overflow: hidden;
}

.page-faq .media--view {
  aspect-ratio: 3 / 2;
}

.page-faq .media--phone {
  aspect-ratio: 3 / 4;
}

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

/* 手风琴 */
.page-faq .acc {
  display: grid;
  gap: .6rem;
  margin-top: 1.35rem;
}

.page-faq .acc details {
  border: 1px solid var(--line);
  background: rgba(7, 20, 38, .74);
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 0 100%);
  transition: border-color .18s ease;
}

.page-faq .acc details:hover,
.page-faq .acc details[open] {
  border-color: var(--line-live);
}

.page-faq .acc summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: .9rem 1.1rem;
  list-style: none;
  cursor: pointer;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: .95rem;
  line-height: 1.5;
  color: var(--mist);
}

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

.page-faq .acc summary:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: -2px;
}

.page-faq .acc__icon {
  position: relative;
  flex: none;
  width: 14px;
  height: 14px;
}

.page-faq .acc__icon::before,
.page-faq .acc__icon::after {
  content: "";
  position: absolute;
  background: var(--lime);
}

.page-faq .acc__icon::before {
  left: 0;
  right: 0;
  top: 6px;
  height: 2px;
}

.page-faq .acc__icon::after {
  top: 0;
  bottom: 0;
  left: 6px;
  width: 2px;
  transition: transform .2s ease;
}

.page-faq .acc details[open] .acc__icon::after {
  transform: scaleY(0);
}

.page-faq .acc__body {
  padding: 0 1.1rem 1.05rem;
  font-size: .92rem;
  line-height: 1.8;
  color: var(--silver);
}

.page-faq .acc__body p {
  margin: 0 0 .6rem;
  font-size: .92rem;
  line-height: 1.8;
}

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

.page-faq .acc__body a {
  color: var(--aqua);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .acc__body a:hover {
  color: var(--lime);
}

/* 指标标签 */
.page-faq .metric-lead {
  margin: 1.5rem 0 0;
  font-size: .88rem;
  color: var(--silver);
}

.page-faq .metric-chips {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  list-style: none;
  margin: .8rem 0 0;
  padding: 0;
}

.page-faq .metric-chips li {
  padding: .38rem .75rem;
  border: 1px solid var(--line);
  background: rgba(127, 231, 212, .05);
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .04em;
  color: var(--aqua);
}

/* 同步设置卡片 */
.page-faq .sync-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: .85rem;
  margin-top: 1.25rem;
}

.page-faq .sync-card {
  padding: 1.15rem 1.2rem;
  border: 1px solid var(--line);
  background: linear-gradient(160deg, rgba(18, 57, 92, .55), rgba(7, 20, 38, .88));
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 0 100%);
  transition: border-color .18s ease, background .18s ease;
}

.page-faq .sync-card:hover {
  border-color: var(--line-live);
  background: linear-gradient(160deg, rgba(18, 57, 92, .72), rgba(7, 20, 38, .9));
}

.page-faq .sync-card h3 {
  font-size: .98rem;
  margin: 0 0 .5rem;
}

.page-faq .sync-card h3::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: .55rem;
  background: var(--ember);
  transform: rotate(45deg);
  vertical-align: middle;
}

.page-faq .sync-card p {
  margin: 0;
  font-size: .9rem;
  line-height: 1.75;
  color: var(--silver);
}

/* 图文分栏 */
.page-faq .faq-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.5rem;
  margin-top: 1.25rem;
}

.page-faq .faq-split p {
  font-size: .94rem;
}

/* 底部帮助条 */
.page-faq .faq-help {
  display: grid;
  gap: 1rem;
  margin-top: clamp(2.25rem, 5vw, 3.25rem);
  padding: 1.5rem 1.4rem;
  border: 1px solid var(--line-live);
  background: linear-gradient(120deg, rgba(201, 255, 59, .08), rgba(255, 90, 54, .09));
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 0 100%);
}

.page-faq .faq-help p {
  margin: 0;
  max-width: 54ch;
  font-size: .95rem;
  color: var(--mist);
}

.page-faq .faq-help__links {
  display: flex;
  flex-wrap: wrap;
  gap: .65rem;
}

@media (min-width: 640px) {
  .page-faq .sync-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
  }
}

@media (min-width: 820px) {
  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 300px);
    gap: clamp(1.5rem, 4vw, 3rem);
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, .85fr);
    align-items: end;
    gap: 2.5rem;
  }

  .page-faq .faq-hero__note {
    margin-bottom: .4rem;
  }
}

@media (min-width: 1020px) {
  .page-faq .faq-body {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: clamp(2rem, 4vw, 4rem);
    align-items: start;
  }

  .page-faq .tree-rail {
    display: block;
    position: sticky;
    top: 6rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq * {
    transition: none !important;
  }
}