/* ==========================================================
   FAQ / 帮助中心 页面专属样式
   作用域：.page-faq
   ========================================================== */
.page-faq{
  /* 页面内局部变量 */
  --faq-card-bg:#FFFFFF;
  --faq-hero-muted:rgba(245,247,250,0.82);
  --faq-line:rgba(141,155,181,0.22);
  --faq-cyan-soft:rgba(0,194,209,0.1);
  --faq-orange-soft:rgba(255,107,0,0.12);
}

/* ---------- Hero 区 ---------- */
.page-faq__hero{
  position:relative;
  background:var(--bg-primary);
  color:var(--text-light);
  padding:56px 0 56px;
  overflow:hidden;
}
.page-faq__hero::before{
  content:"";
  position:absolute;
  inset:0;
  background:repeating-linear-gradient(135deg,rgba(255,255,255,0.03) 0 2px,transparent 2px 12px);
  pointer-events:none;
}
.page-faq__hero::after{
  content:"";
  position:absolute;
  top:0;right:0;
  width:240px;height:100%;
  background:linear-gradient(135deg,transparent 0%,rgba(255,107,0,0.08) 45%,rgba(255,107,0,0.24) 100%);
  pointer-events:none;
}
.page-faq__hero .container{
  position:relative;
  z-index:1;
}
.page-faq__hero .breadcrumb{
  margin-bottom:32px;
}
.page-faq__hero-grid{
  display:grid;
  gap:36px;
  align-items:center;
}
.page-faq__kicker{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:0.14em;
  text-transform:uppercase;
  color:var(--accent-cyan);
  margin:0 0 12px;
}
.page-faq__hero h1{
  font-family:var(--font-body);
  font-weight:900;
  font-size:clamp(28px,4.4vw,48px);
  line-height:1.25;
  margin:0 0 18px;
  color:var(--text-light);
  max-width:880px;
}
.page-faq__hero-accent{
  color:var(--accent-orange);
}
.page-faq__hero-desc{
  font-size:15px;
  line-height:1.85;
  color:var(--faq-hero-muted);
  max-width:640px;
  margin:0 0 28px;
}
.page-faq__search{
  position:relative;
  max-width:560px;
}
.page-faq__search-icon{
  position:absolute;
  right:18px;
  top:50%;
  transform:translateY(-50%);
  width:20px;
  height:20px;
  color:var(--accent-cyan);
  pointer-events:none;
}
.page-faq__search input{
  width:100%;
  box-sizing:border-box;
  background:var(--bg-secondary);
  border:1px solid var(--border-light);
  border-radius:var(--radius-pill);
  padding:15px 48px 15px 22px;
  color:var(--text-light);
  font-family:var(--font-body);
  font-size:15px;
  outline:none;
  transition:border-color var(--transition-base),box-shadow var(--transition-base);
}
.page-faq__search input::placeholder{
  color:rgba(245,247,250,0.5);
}
.page-faq__search input:focus{
  border-color:var(--accent-cyan);
  box-shadow:0 0 0 3px rgba(0,194,209,0.18);
}
.page-faq__hero-side{
  background:var(--bg-secondary);
  border-left:3px solid var(--accent-orange);
  border-radius:4px;
  padding:20px;
  box-shadow:0 12px 30px rgba(0,0,0,0.22);
}
.page-faq__hero-side-brand{
  font-family:var(--font-mono);
  font-size:13px;
  line-height:1.6;
  color:var(--accent-cyan);
  margin:0 0 18px;
  padding-bottom:12px;
  border-bottom:1px dashed var(--faq-line);
}
.page-faq__hero-side-label{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:0.12em;
  text-transform:uppercase;
  color:var(--text-gray);
  margin:0 0 6px;
}
.page-faq__hero-side-badge{
  font-family:var(--font-mono);
  font-size:28px;
  color:var(--accent-orange);
  margin:0 0 18px;
}
.page-faq__hero-side-badge em{
  font-style:normal;
  font-size:13px;
  color:var(--text-light);
  margin-left:10px;
}
.page-faq__hero-data{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:12px;
  margin:0;
}
.page-faq__hero-data div{
  border-top:1px solid var(--faq-line);
  padding-top:10px;
}
.page-faq__hero-data dt{
  font-size:11px;
  color:var(--text-gray);
}
.page-faq__hero-data dd{
  font-family:var(--font-mono);
  font-size:20px;
  line-height:1.2;
  color:var(--accent-cyan);
  margin:4px 0 0;
}

/* ---------- 主体背景 / 内容区 ---------- */
.page-faq__body{
  background:
    linear-gradient(rgba(141,155,181,0.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(141,155,181,0.05) 1px,transparent 1px),
    var(--bg-light);
  background-size:32px 32px;
  padding:48px 0 72px;
}
.page-faq__layout{
  display:grid;
  gap:40px;
  align-items:start;
}

/* ---------- 侧栏：分类锚点 ---------- */
.page-faq__aside{
  min-width:0;
}
.page-faq__aside-card{
  background:var(--bg-secondary);
  border-radius:var(--radius-card);
  padding:20px;
  color:var(--text-light);
}
.page-faq__aside-label{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:0.14em;
  text-transform:uppercase;
  color:var(--accent-cyan);
  margin:0 0 14px;
}
.page-faq__nav{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
}
.page-faq__nav-link{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:9px 14px;
  border-radius:var(--radius-pill);
  background:var(--bg-primary);
  border:1px solid var(--border-light);
  color:var(--text-light);
  font-size:13px;
  font-weight:500;
  text-decoration:none;
  transition:border-color var(--transition-base),background-color var(--transition-base),color var(--transition-base);
  white-space:nowrap;
}
.page-faq__nav-link svg{
  width:15px;
  height:15px;
  color:var(--accent-cyan);
  flex-shrink:0;
}
.page-faq__nav-link:hover,
.page-faq__nav-link:focus-visible{
  border-color:var(--accent-orange);
  color:var(--text-light);
  background:var(--bg-secondary);
}
.page-faq__nav-text{
  line-height:1.2;
}
.page-faq__nav-no{
  font-style:normal;
  font-family:var(--font-mono);
  font-size:11px;
  color:var(--accent-orange);
  margin-left:2px;
}
.page-faq__aside-foot{
  font-size:12px;
  line-height:1.7;
  color:rgba(245,247,250,0.65);
  margin:16px 0 0;
  padding-top:14px;
  border-top:1px dashed var(--faq-line);
}

/* ---------- 主内容 ---------- */
.page-faq__main{
  min-width:0;
}
.page-faq__section{
  margin-bottom:48px;
}
.page-faq__section-head{
  display:flex;
  align-items:baseline;
  gap:16px;
  padding-bottom:16px;
  margin-bottom:22px;
  border-bottom:1px solid var(--border-light);
}
.page-faq__section-no{
  font-family:var(--font-mono);
  font-size:42px;
  line-height:1;
  font-weight:700;
  color:var(--accent-orange);
  display:block;
  flex-shrink:0;
}
.page-faq__section-intro .section-title{
  font-family:var(--font-display);
  font-size:clamp(24px,3vw,34px);
  font-weight:600;
  line-height:1.2;
  color:var(--text-dark);
  margin:0 0 4px;
}
.page-faq__section-intro p{
  font-size:14px;
  line-height:1.7;
  color:var(--text-gray);
  margin:0;
}

/* ---------- FAQ 手风琴项 ---------- */
.page-faq__list{
  display:block;
}
.page-faq__item{
  background:var(--faq-card-bg);
  border:1px solid var(--border-light);
  border-radius:var(--radius-card);
  margin-bottom:12px;
  overflow:hidden;
  transition:border-color var(--transition-base),box-shadow var(--transition-base);
}
.page-faq__item[open]{
  border-color:var(--accent-cyan);
  box-shadow:0 6px 24px rgba(0,194,209,0.1);
}
.page-faq__item-summary{
  display:flex;
  align-items:center;
  gap:14px;
  padding:18px 18px;
  cursor:pointer;
  list-style:none;
  user-select:none;
  transition:background-color var(--transition-base);
}
.page-faq__item-summary::-webkit-details-marker{
  display:none;
}
.page-faq__item-summary:focus-visible{
  outline:2px solid var(--accent-cyan);
  outline-offset:-2px;
}
.page-faq__item[open] .page-faq__item-summary{
  background:var(--faq-cyan-soft);
}
.page-faq__item-no{
  font-family:var(--font-mono);
  font-size:13px;
  line-height:1;
  min-width:42px;
  text-align:center;
  background:var(--faq-cyan-soft);
  color:var(--accent-cyan);
  border-radius:6px;
  padding:7px 6px;
}
.page-faq__item[open] .page-faq__item-no{
  background:rgba(255,107,0,0.12);
  color:var(--accent-orange);
}
.page-faq__item-q{
  flex:1;
  font-size:15px;
  font-weight:600;
  line-height:1.55;
  color:var(--text-dark);
}
.page-faq__item-arrow{
  width:18px;
  height:18px;
  flex-shrink:0;
  color:var(--text-gray);
  transition:transform 0.25s ease,color 0.2s ease;
}
.page-faq__item[open] .page-faq__item-arrow{
  transform:rotate(180deg);
  color:var(--accent-orange);
}
.page-faq__item-body{
  border-top:1px dashed var(--faq-line);
  padding:14px 18px 20px;
  font-size:14px;
  line-height:1.85;
  color:var(--text-dark);
}
.page-faq__item-body p{
  margin:0 0 10px;
}
.page-faq__item-body p:last-child{
  margin-bottom:0;
}
.page-faq__item-toolbar{
  display:flex;
  justify-content:flex-end;
  margin-bottom:6px;
}
.page-faq__copy-btn{
  width:32px;
  height:32px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  background:transparent;
  border:1px solid var(--border-light);
  border-radius:8px;
  cursor:pointer;
  transition:border-color var(--transition-base),background-color var(--transition-base);
}
.page-faq__copy-btn:hover{
  border-color:var(--accent-cyan);
  background:var(--faq-cyan-soft);
}
.page-faq__copy-btn svg{
  width:14px;
  height:14px;
  color:var(--text-gray);
}
.page-faq__item-links{
  margin-top:12px;
}
.page-faq__item-links a{
  color:var(--accent-orange);
  font-weight:600;
  text-decoration:none;
  font-size:13px;
  border-bottom:1px solid rgba(255,107,0,0.3);
  transition:border-color var(--transition-base);
}
.page-faq__item-links a:hover{
  border-bottom-color:var(--accent-orange);
}
.page-faq__contact-list{
  margin:12px 0;
  padding-left:0;
  list-style:none;
}
.page-faq__contact-list li{
  padding:6px 0 6px 22px;
  position:relative;
  font-family:var(--font-mono);
  font-size:13px;
  line-height:1.6;
}
.page-faq__contact-list li::before{
  content:"";
  position:absolute;
  left:0;
  top:50%;
  transform:translateY(-50%);
  width:8px;
  height:8px;
  background:var(--accent-cyan);
  clip-path:polygon(0 0,100% 0,100% 35%,35% 100%,0 100%);
}

/* ---------- 图形插图 ---------- */
.page-faq__figure{
  margin:36px 0;
  background:var(--bg-primary);
  border-radius:4px;
  clip-path:polygon(0 0,calc(100% - 22px) 0,100% 22px,100% 100%,22px 100%,0 calc(100% - 22px));
}
.page-faq__figure img{
  display:block;
  width:100%;
  max-width:100%;
  height:auto;
  object-fit:cover;
}
.page-faq__figcaption{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:0.06em;
  color:var(--accent-cyan);
  padding:10px 18px 14px;
  background:var(--bg-primary);
}

/* ---------- 时效声明 ---------- */
.page-faq__service{
  margin:48px 0 0;
  background:var(--warning);
  border-radius:var(--radius-card);
  padding:20px 24px;
  color:var(--text-dark);
  position:relative;
  overflow:hidden;
}
.page-faq__service::after{
  content:"";
  position:absolute;
  right:-30px;
  bottom:-30px;
  width:120px;
  height:120px;
  background:rgba(255,107,0,0.12);
  transform:rotate(12deg);
}
.page-faq__service-tag{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:0.12em;
  text-transform:uppercase;
  color:var(--accent-orange);
  margin:0 0 8px;
  font-weight:700;
}
.page-faq__service p{
  margin:0;
  font-size:14px;
  line-height:1.85;
  max-width:760px;
  position:relative;
  z-index:1;
}

/* ---------- CTA ---------- */
.page-faq__cta{
  background:var(--bg-primary);
  color:var(--text-light);
  padding:56px 0;
  position:relative;
  overflow:hidden;
}
.page-faq__cta::before{
  content:"";
  position:absolute;
  top:0;left:0;
  width:100%;
  height:3px;
  background:linear-gradient(90deg,var(--accent-orange) 0%,var(--accent-cyan) 100%);
}
.page-faq__cta::after{
  content:"";
  position:absolute;
  right:-90px;
  bottom:-110px;
  width:260px;
  height:260px;
  background:radial-gradient(circle,rgba(255,107,0,0.28),transparent 70%);
  pointer-events:none;
}
.page-faq__cta-inner{
  display:flex;
  flex-wrap:wrap;
  gap:28px;
  justify-content:space-between;
  align-items:center;
}
.page-faq__cta-copy{
  flex:1;
  min-width:260px;
}
.page-faq__cta h2{
  font-family:var(--font-display);
  font-size:clamp(26px,3.6vw,40px);
  line-height:1.2;
  margin:0 0 8px;
}
.page-faq__cta-copy p{
  color:rgba(245,247,250,0.72);
  font-size:14px;
  line-height:1.7;
  margin:0;
}
.page-faq__cta-actions{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  position:relative;
  z-index:1;
}
.page-faq__cta .btn--primary{
  background:var(--accent-orange);
  border-color:var(--accent-orange);
  color:#FFFFFF;
}
.page-faq__cta .btn--primary:hover{
  background:var(--accent-orange-light);
  border-color:var(--accent-orange-light);
}
.page-faq__cta .btn{
  border:1px solid rgba(245,247,250,0.45);
  color:var(--text-light);
}
.page-faq__cta .btn:hover{
  border-color:var(--accent-cyan);
}

/* ---------- 响应式断点 ---------- */
@media (min-width: 640px){
  .page-faq__hero-grid{
    grid-template-columns:minmax(0,1.6fr) minmax(240px,0.7fr);
    gap:40px;
    align-items:end;
  }
  .page-faq__hero-side{
    padding:22px;
  }
}

@media (min-width: 1024px){
  .page-faq__hero{
    padding:64px 0 72px;
  }
  .page-faq__hero h1{
    font-size:clamp(38px,4.6vw,52px);
    line-height:1.18;
  }
  .page-faq__body{
    padding:64px 0 88px;
  }
  .page-faq__layout{
    grid-template-columns:280px minmax(0,1fr);
    gap:56px;
  }
  .page-faq__aside{
    position:sticky;
    top:calc(var(--header-height) + 24px);
  }
  .page-faq__aside-card{
    background:var(--bg-secondary);
    padding:20px 18px;
  }
  .page-faq__nav{
    flex-direction:column;
    align-items:stretch;
    gap:4px;
  }
  .page-faq__nav-link{
    justify-content:flex-start;
    border-radius:0;
    border:1px solid transparent;
    border-left:3px solid transparent;
    background:transparent;
    padding:12px 10px;
    white-space:normal;
  }
  .page-faq__nav-link:hover,
  .page-faq__nav-link:focus-visible{
    background:var(--bg-primary);
    border-left-color:var(--accent-orange);
    border-color:var(--border-light);
  }
  .page-faq__nav-no{
    margin-left:auto;
  }
  .page-faq__section{
    margin-bottom:64px;
  }
  .page-faq__section-head{
    gap:24px;
    margin-bottom:28px;
  }
  .page-faq__section-no{
    font-size:52px;
  }
  .page-faq__item-summary{
    padding:20px 22px;
  }
  .page-faq__item-body{
    padding:16px 22px 24px;
  }
  .page-faq__figure{
    margin:44px 0;
  }
}