.page-faq{
  --faq-grid-line: rgba(255,255,255,0.14);
  position: relative;
  overflow-x: clip;
}

/* === 顶部氛围区 === */
.page-faq .faq-hero{
  position: relative;
  min-height: 240px;
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--line);
  background: var(--bg);
}
.page-faq .faq-hero-bg{
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.page-faq .faq-hero-veil{
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(10,10,20,0.94) 0%, rgba(19,18,38,0.80) 45%, rgba(59,45,110,0.42) 100%);
}
.page-faq .faq-hero-inner{
  position: relative;
  z-index: 2;
  padding-top: 36px;
  padding-bottom: 36px;
}
.page-faq .breadcrumb{
  margin-bottom: 20px;
}
.page-faq h1{
  font-size: 30px;
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: 0.02em;
  color: var(--silver);
  margin: 0 0 10px;
}
.page-faq .faq-hero-lead{
  max-width: 640px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--gray);
  margin: 0;
}

/* === 主布局：移动端纵向，桌面端两栏 === */
.page-faq .faq-layout{
  display: flex;
  flex-direction: column;
  gap: 36px;
  padding-top: 40px;
  padding-bottom: 88px;
}

/* === 左侧目录 === */
.page-faq .faq-index{
  position: relative;
  align-self: flex-start;
  width: 100%;
  padding: 22px 20px;
  border: 1px solid var(--line);
}
.page-faq .faq-index::before{
  content: "INDEX / 05";
  position: absolute;
  top: 16px;
  right: 18px;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--gray);
  opacity: 0.72;
}
.page-faq .faq-index-head{
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}
.page-faq .faq-index-label{
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--blue);
  margin: 0;
  text-transform: uppercase;
}
.page-faq .faq-index-coord{
  font-family: var(--font-data);
  font-size: 11px;
  color: var(--gray);
  opacity: 0.6;
}
.page-faq .faq-nav{
  display: flex;
  flex-direction: column;
}
.page-faq .faq-nav-link{
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 13px 0;
  border-bottom: 1px dashed var(--line);
  color: var(--silver);
  text-decoration: none;
  transition: color 0.2s ease-out, padding-left 0.2s ease-out, background 0.2s ease-out;
}
.page-faq .faq-nav-link:last-child{
  border-bottom: 0;
}
.page-faq .faq-nav-link:hover,
.page-faq .faq-nav-link:focus-visible{
  color: var(--blue);
  padding-left: 8px;
  outline: none;
}
.page-faq .faq-nav-num{
  font-family: var(--font-data);
  font-size: 12px;
  color: var(--gray);
  transition: color 0.2s ease-out;
}
.page-faq .faq-nav-link:hover .faq-nav-num,
.page-faq .faq-nav-link:focus-visible .faq-nav-num{
  color: var(--blue);
}
.page-faq .faq-nav-text{
  font-size: 15px;
  font-weight: 600;
}

/* === 右侧内容 === */
.page-faq .faq-content{
  min-width: 0;
}
.page-faq .faq-section{
  scroll-margin-top: 96px;
  margin-bottom: 56px;
}
.page-faq .faq-section:last-of-type{
  margin-bottom: 64px;
}

/* === 章节头 === */
.page-faq .faq-section-head{
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 16px;
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}
.page-faq .faq-section-head .index-code{
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--blue);
}
.page-faq .faq-section-head .section-title{
  font-size: 24px;
  font-weight: 800;
  line-height: 1.3;
  color: var(--silver);
  margin: 0;
}
.page-faq .faq-section-head .section-desc{
  width: 100%;
  font-size: 14px;
  line-height: 1.6;
  color: var(--gray);
  margin: 0;
}

/* === 数据流示意图 === */
.page-faq .faq-diagram{
  margin: 0 0 28px;
  padding: 12px;
  border: 1px solid var(--line);
  background: var(--bg-deep);
}
.page-faq .faq-diagram img{
  display: block;
  width: 100%;
  height: auto;
}
.page-faq .faq-diagram figcaption{
  margin-top: 10px;
  font-size: 13px;
}

/* === 手风琴项目 === */
.page-faq .faq-item{
  position: relative;
  margin: 0 0 22px 10px;
  padding-left: 20px;
  border-left: 2px solid var(--line);
  background: linear-gradient(90deg, rgba(255,255,255,0.03) 0%, rgba(255,255,255,0.01) 100%);
  transition: border-color 0.2s ease-out, background 0.2s ease-out;
}
.page-faq .faq-item::before{
  content: "";
  position: absolute;
  left: -7px;
  top: 26px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--gray);
  transition: background 0.2s ease-out, border-color 0.2s ease-out, box-shadow 0.2s ease-out;
}
.page-faq .faq-item[open]{
  border-left-color: var(--blue);
  background: linear-gradient(90deg, rgba(0,194,255,0.06) 0%, rgba(255,255,255,0.01) 100%);
}
.page-faq .faq-item[open]::before{
  background: var(--blue);
  border-color: var(--blue);
  box-shadow: 0 0 0 4px rgba(0,194,255,0.14);
}
.page-faq .faq-question{
  list-style: none;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 0 14px;
  cursor: pointer;
  user-select: none;
}
.page-faq .faq-question::-webkit-details-marker{
  display: none;
}
.page-faq .faq-q-num{
  flex: 0 0 auto;
  font-family: var(--font-data);
  font-size: 12px;
  line-height: 1.6;
  color: var(--gray);
  padding-top: 4px;
}
.page-faq .faq-q-text{
  flex: 1 1 auto;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--silver);
  margin: 0;
}
.page-faq .faq-q-toggle{
  flex: 0 0 20px;
  width: 20px;
  height: 24px;
  position: relative;
  margin-top: 2px;
}
.page-faq .faq-q-toggle::before{
  content: "";
  position: absolute;
  top: 11px;
  left: 4px;
  width: 12px;
  height: 2px;
  background: var(--gray);
  transition: background 0.2s ease-out, transform 0.2s ease-out;
}
.page-faq .faq-q-toggle::after{
  content: "";
  position: absolute;
  top: 6px;
  left: 9px;
  width: 2px;
  height: 12px;
  background: var(--gray);
  transition: background 0.2s ease-out, transform 0.2s ease-out;
}
.page-faq .faq-item[open] .faq-q-toggle::before{
  background: var(--blue);
  transform: rotate(45deg);
}
.page-faq .faq-item[open] .faq-q-toggle::after{
  background: var(--blue);
  transform: rotate(135deg);
}

/* === 答案区 === */
.page-faq .faq-answer{
  position: relative;
  margin: 0 0 18px;
  padding: 12px 16px 14px 18px;
  border-left: 1px solid var(--blue);
  background: rgba(255,255,255,0.035);
}
.page-faq .faq-answer-coord{
  position: absolute;
  top: 10px;
  right: 12px;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--gray);
  opacity: 0.55;
}
.page-faq .faq-answer p{
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--gray);
}
.page-faq .faq-answer p:last-child{
  margin-bottom: 0;
}
.page-faq .faq-answer ul{
  margin: 0 0 12px;
  padding-left: 18px;
  list-style: none;
}
.page-faq .faq-answer li{
  position: relative;
  font-size: 15px;
  line-height: 1.7;
  color: var(--gray);
  padding-left: 14px;
  margin-bottom: 6px;
}
.page-faq .faq-answer li::before{
  content: "";
  position: absolute;
  left: 0;
  top: 0.75em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--gray);
  opacity: 0.8;
}
.page-faq .faq-answer a{
  color: var(--blue);
  text-decoration: underline;
  text-decoration-color: rgba(0,194,255,0.4);
  text-underline-offset: 4px;
  transition: color 0.2s ease-out;
}
.page-faq .faq-answer a:hover{
  color: var(--silver);
  text-decoration-color: var(--blue);
}

/* === 底部引导区 === */
.page-faq .faq-more{
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
  padding: 24px 20px;
  border: 1px solid var(--line);
  background: linear-gradient(135deg, rgba(123,92,255,0.08) 0%, rgba(10,10,20,0.60) 60%);
}
.page-faq .faq-more-title{
  font-size: 20px;
  font-weight: 800;
  color: var(--silver);
  margin: 0;
}
.page-faq .faq-more-desc{
  font-size: 14px;
  line-height: 1.7;
  color: var(--gray);
  margin: 0;
  max-width: 680px;
}
.page-faq .faq-more-actions{
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 6px;
}

/* === 桌面端增强 === */
@media (min-width: 992px){
  .page-faq h1{
    font-size: 38px;
  }
  .page-faq .faq-hero{
    min-height: 300px;
  }
  .page-faq .faq-layout{
    display: grid;
    grid-template-columns: 300px minmax(0, 1fr);
    gap: 64px;
    padding-top: 56px;
    padding-bottom: 120px;
    align-items: start;
  }
  .page-faq .faq-index{
    position: sticky;
    top: 24px;
    width: auto;
  }
  .page-faq .faq-content{
    max-width: 820px;
  }
  .page-faq .faq-section-head .section-title{
    font-size: 28px;
  }
  .page-faq .faq-q-text{
    font-size: 17px;
  }
  .page-faq .faq-answer p,
  .page-faq .faq-answer li{
    font-size: 15px;
  }
}