.page-faq {
  position: relative;
  background: var(--bg-deep);
  color: var(--text-main);
  padding: 2rem 0 4rem;
  overflow: hidden;
}
.page-faq::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(42, 59, 92, 0.22) 1px, transparent 1px),
    linear-gradient(90deg, rgba(42, 59, 92, 0.22) 1px, transparent 1px);
  background-size: 56px 56px;
  pointer-events: none;
}
.page-faq .container {
  position: relative;
  z-index: 1;
}

/* 面包屑 */
.page-faq .breadcrumbs {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--grid-line);
  margin-bottom: 2.25rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-sub);
}
.page-faq .breadcrumbs a {
  color: var(--text-sub);
  text-decoration: none;
  transition: color 0.2s;
}
.page-faq .breadcrumbs a:hover,
.page-faq .breadcrumbs a:focus {
  color: var(--neon-green);
  outline: none;
}
.page-faq .breadcrumbs-sep {
  color: var(--grid-line);
}
.page-faq .breadcrumbs [aria-current="page"] {
  color: var(--neon-green);
  font-weight: 700;
}

/* Hero */
.page-faq .faq-hero {
  position: relative;
  margin-bottom: 2.75rem;
  padding-left: 1.25rem;
  border-left: 3px solid var(--neon-green);
}
.page-faq .faq-hero .tag-alert {
  display: inline-block;
  margin-bottom: 1rem;
  background: var(--electric-orange);
  color: var(--bg-deep);
  border: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  padding: 0.3rem 0.75rem;
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 0 100%);
}
.page-faq .faq-hero h1 {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.65rem, 4vw, 2.75rem);
  line-height: 1.25;
  letter-spacing: -0.01em;
}
.page-faq .faq-hero .text-sub {
  max-width: 660px;
  margin: 0;
  color: var(--text-sub);
  font-family: var(--font-mono);
  font-size: 0.88rem;
  line-height: 1.9;
}

/* 主布局 */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

/* 侧边栏 */
.page-faq .faq-sidebar-inner {
  position: relative;
  background-color: var(--bg-panel);
  background-image: linear-gradient(rgba(42, 59, 92, 0.3) 1px, transparent 1px);
  background-size: 100% 32px;
  border: 1px solid var(--grid-line);
  padding: 1.25rem 1.25rem 1.5rem;
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
}
.page-faq .faq-sidebar .panel-label {
  display: inline-block;
  margin-bottom: 0.75rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--neon-green);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--neon-green);
}
.page-faq .faq-anchor-nav {
  display: flex;
  flex-direction: column;
}
.page-faq .faq-anchor-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem 0;
  border-bottom: 1px dashed var(--grid-line);
  color: var(--text-main);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  transition: color 0.2s, padding-left 0.2s;
}
.page-faq .faq-anchor-link span {
  padding: 0.15rem 0.4rem;
  background: rgba(0, 255, 135, 0.08);
  color: var(--neon-green);
  font-size: 0.72rem;
  clip-path: polygon(0 0, calc(100% - 5px) 0, 100% 5px, 100% 100%, 0 100%);
}
.page-faq .faq-anchor-link:hover,
.page-faq .faq-anchor-link:focus {
  padding-left: 0.4rem;
  color: var(--neon-green);
  outline: none;
}
.page-faq .faq-sidebar-note {
  margin-top: 1.25rem;
  padding-top: 1.1rem;
  border-top: 1px solid var(--grid-line);
}
.page-faq .faq-sidebar-note p {
  margin: 0 0 0.5rem;
  font-size: 0.8rem;
  line-height: 1.7;
}
.page-faq .faq-sidebar-note .text-mono {
  color: var(--electric-orange);
  font-weight: 700;
}
.page-faq .faq-sidebar-note a {
  color: var(--text-main);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.page-faq .faq-sidebar-note a:hover {
  color: var(--neon-green);
}

/* 章节 */
.page-faq .faq-section {
  scroll-margin-top: calc(var(--header-h) + 1rem);
  margin-bottom: 3.5rem;
}
.page-faq .faq-section:target .faq-section-head {
  background: rgba(0, 255, 135, 0.06);
}
.page-faq .faq-section:target .faq-section-head h2 {
  color: var(--neon-green);
}
.page-faq .faq-section-head {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.5rem;
  padding: 0.35rem;
  transition: background 0.3s;
}
.page-faq .faq-section-head .section-index {
  flex-shrink: 0;
  padding: 0.5rem 0.7rem;
  background: rgba(0, 255, 135, 0.08);
  color: var(--neon-green);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 2.2rem;
  line-height: 1;
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 0 100%);
}
.page-faq .faq-section-head h2 {
  margin: 0.1rem 0 0.3rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.5rem;
  line-height: 1.3;
  transition: color 0.3s;
}
.page-faq .faq-section-head p {
  margin: 0;
  color: var(--text-sub);
  font-family: var(--font-mono);
  font-size: 0.78rem;
}

/* 图片 */
.page-faq .faq-figure {
  max-width: 420px;
  margin: 0 0 1.5rem;
  padding: 0.75rem;
  background: var(--bg-panel);
  border: 1px solid var(--grid-line);
  border-left: 3px solid var(--neon-green);
}
.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(1.15) contrast(1.05);
}
.page-faq .faq-figure figcaption {
  padding-top: 0.6rem;
  color: var(--text-sub);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
}

/* 折叠列表 */
.page-faq .faq-list {
  border-top: 1px solid var(--grid-line);
}
.page-faq .faq-item {
  position: relative;
  background: var(--bg-panel);
  border: 1px solid var(--grid-line);
  border-top: 0;
  border-left-width: 3px;
  border-left-color: transparent;
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.15);
  transition: border-color 0.25s;
}
.page-faq .faq-item[open] {
  border-left-color: var(--neon-green);
}
.page-faq .faq-item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 0.9rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
  line-height: 1.5;
  user-select: none;
  transition: background 0.2s;
}
.page-faq .faq-item summary::-webkit-details-marker {
  display: none;
}
.page-faq .faq-item summary:focus-visible {
  outline: 2px solid var(--neon-green);
  outline-offset: -2px;
}
.page-faq .faq-item summary:hover {
  background: rgba(0, 255, 135, 0.04);
}
.page-faq .faq-item[open] summary {
  border-bottom: 1px solid var(--grid-line);
  background: linear-gradient(90deg, rgba(0, 255, 135, 0.06), transparent 60%);
}
.page-faq .faq-q-q {
  flex-shrink: 0;
  padding: 0.28rem 0.5rem;
  background: var(--neon-green);
  color: var(--bg-deep);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  clip-path: polygon(0 0, calc(100% - 5px) 0, 100% 5px, 100% 100%, 0 100%);
}
.page-faq .faq-q-title {
  flex: 1;
  min-width: 0;
}
.page-faq .faq-icon {
  position: relative;
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  margin-left: auto;
}
.page-faq .faq-icon::before,
.page-faq .faq-icon::after {
  content: "";
  position: absolute;
  display: block;
  background: var(--neon-green);
  transition: transform 0.3s var(--ease-out), opacity 0.3s;
}
.page-faq .faq-icon::before {
  top: 8px;
  left: 2px;
  width: 14px;
  height: 2px;
}
.page-faq .faq-icon::after {
  top: 2px;
  left: 8px;
  width: 2px;
  height: 14px;
}
.page-faq .faq-item[open] .faq-icon::after {
  transform: scaleY(0);
  opacity: 0;
}

/* 答案 */
.page-faq .faq-answer {
  display: flex;
  gap: 0.9rem;
  padding: 1.15rem 0.9rem;
  background: rgba(11, 16, 38, 0.45);
}
.page-faq .faq-a-a {
  flex-shrink: 0;
  height: fit-content;
  padding: 0.22rem 0.45rem;
  border: 1px solid var(--neon-green);
  color: var(--neon-green);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  line-height: 1.6;
  clip-path: polygon(0 0, calc(100% - 5px) 0, 100% 5px, 100% 100%, 0 100%);
}
.page-faq .faq-answer-body {
  flex: 1;
  min-width: 0;
}
.page-faq .faq-answer-body p {
  margin: 0 0 0.75rem;
  color: var(--text-sub);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.9;
}
.page-faq .faq-answer-body p:last-child {
  margin-bottom: 0;
}
.page-faq .faq-answer-body .tag {
  display: inline-block;
  padding: 0 0.35rem;
  background: transparent;
  border: 1px solid var(--electric-orange);
  color: var(--electric-orange);
  font-family: var(--font-mono);
  font-size: 0.7rem;
}
.page-faq .faq-answer-body .text-mono {
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px dashed var(--grid-line);
  color: var(--grid-line);
  font-size: 0.72rem;
}
.page-faq .faq-answer-body a {
  color: var(--neon-green);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.page-faq .faq-answer-body a:hover {
  color: var(--electric-orange);
}

/* 底部帮助 */
.page-faq .faq-more {
  position: relative;
  margin-top: 1rem;
  padding: 2rem 1.5rem;
  background: var(--indigo);
  border: 1px solid var(--grid-line);
  text-align: center;
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 0 100%);
}
.page-faq .faq-more p {
  margin: 0 0 0.75rem;
}
.page-faq .faq-more .text-heavy {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.35rem;
}
.page-faq .faq-more .text-sub {
  color: var(--text-sub);
  font-size: 0.82rem;
  line-height: 1.8;
}
.page-faq .faq-more .text-sub a {
  color: var(--neon-green);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.page-faq .faq-more .btn {
  display: inline-block;
  margin: 1rem 0.3rem 0;
}

/* 移动端侧边栏横向索引 */
@media (max-width: 991px) {
  .page-faq .faq-anchor-nav {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 0.25rem 1.25rem;
  }
  .page-faq .faq-anchor-link {
    padding: 0.4rem 0;
    border-bottom: 0;
  }
  .page-faq .faq-sidebar-inner {
    padding-bottom: 1.1rem;
  }
}

/* 桌面双列 */
@media (min-width: 992px) {
  .page-faq {
    padding: 2.5rem 0 5rem;
  }
  .page-faq .faq-layout {
    grid-template-columns: 240px minmax(0, 1fr);
    gap: 3rem;
  }
  .page-faq .faq-sidebar-inner {
    position: sticky;
    top: calc(var(--header-h) + 2rem);
  }
  .page-faq .faq-content {
    min-width: 0;
  }
  .page-faq .faq-item summary {
    padding: 1.15rem 1.25rem;
    font-size: 1rem;
  }
  .page-faq .faq-q-q,
  .page-faq .faq-a-a {
    font-size: 0.72rem;
  }
  .page-faq .faq-answer {
    padding: 1.35rem 1.25rem;
  }
  .page-faq .faq-answer-body p {
    font-size: 0.82rem;
  }
  .page-faq .faq-figure {
    max-width: 400px;
  }
}

/* 极小屏按钮堆叠 */
@media (max-width: 480px) {
  .page-faq .faq-more .btn {
    display: block;
    max-width: 220px;
    margin: 0.75rem auto 0;
  }
}