/* ===== 帮助中心 / page-faq ===== */

.page-faq{
  --faq-gap:clamp(18px,3vw,32px);
  --faq-block-gap:clamp(34px,6vw,62px);
  background:var(--deep);
}

/* --- 面包屑 --- */
.page-faq .breadcrumbs{
  padding-top:clamp(14px,2.4vw,22px);
  font-size:13px;
}
.page-faq .breadcrumbs ol{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:6px 10px;
  margin:0;
  padding:0;
  list-style:none;
}
.page-faq .breadcrumbs li{
  display:flex;
  align-items:center;
  color:var(--silver);
}
.page-faq .breadcrumbs li + li::before{
  content:"/";
  margin-right:10px;
  color:rgba(192,199,209,.45);
}
.page-faq .breadcrumbs a{
  color:var(--silver);
  text-decoration:none;
}
.page-faq .breadcrumbs a:hover{
  color:var(--cyan);
}
.page-faq .breadcrumbs a:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:2px;
}

/* --- 首屏 --- */
.page-faq .faq-hero{
  position:relative;
  overflow:hidden;
  padding:clamp(26px,4.5vw,54px) 0 clamp(30px,5.5vw,68px);
  background:
    linear-gradient(150deg, rgba(0,229,255,.10), rgba(11,27,58,0) 52%),
    var(--deep);
  border-bottom:2px solid var(--line-soft);
}
.page-faq .faq-hero::before{
  content:"";
  position:absolute;
  bottom:-45%;
  left:-12%;
  width:min(520px,66vw);
  height:130%;
  background:repeating-linear-gradient(90deg, rgba(192,199,209,.10) 0 1px, transparent 1px 46px);
  transform:rotate(-12deg);
  pointer-events:none;
}
.page-faq .faq-hero::after{
  content:"";
  position:absolute;
  top:-35%;
  right:-14%;
  width:min(600px,68vw);
  height:170%;
  background:linear-gradient(160deg, rgba(0,229,255,.18), rgba(255,107,53,.12) 58%, transparent 86%);
  transform:rotate(12deg);
  pointer-events:none;
}
.page-faq .faq-hero__grid{
  position:relative;
  z-index:1;
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:var(--faq-gap);
}
.page-faq .faq-hero__lead .kicker{
  margin:0 0 4px;
}
.page-faq .faq-hero h1{
  margin:6px 0 0;
  font-size:clamp(38px,8vw,74px);
  line-height:.98;
  letter-spacing:-.03em;
  font-weight:800;
  color:var(--white);
}
.page-faq .faq-hero .lede{
  max-width:62ch;
  margin:16px 0 0;
  color:var(--silver);
  font-size:clamp(15.5px,2vw,17px);
  line-height:1.72;
}
.page-faq .faq-hero__stats{
  display:flex;
  flex-wrap:wrap;
  gap:14px clamp(20px,4vw,44px);
  margin-top:26px;
  padding-top:18px;
  border-top:1px solid var(--line-soft);
}
.page-faq .faq-stat{
  display:flex;
  flex-direction:column;
  gap:3px;
  min-width:96px;
}
.page-faq .faq-stat__num{
  font-size:clamp(21px,3vw,30px);
  font-weight:800;
  letter-spacing:-.02em;
  color:var(--cyan);
}
.page-faq .faq-stat__label{
  font-size:13px;
  color:var(--silver);
}

/* 首屏入口卡 */
.page-faq .faq-hero__aside{
  align-self:end;
  padding:clamp(18px,3vw,26px);
  border:2px solid var(--cyan-line);
  background:linear-gradient(180deg, rgba(6,13,26,.72), rgba(18,36,74,.72));
  box-shadow:var(--shadow-cyan);
}
.page-faq .faq-hero__aside-title{
  margin:0 0 12px;
  font-size:12px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--cyan);
}
.page-faq .faq-hero__routes{
  display:grid;
  margin:0 0 14px;
  padding:0;
  list-style:none;
}
.page-faq .faq-hero__routes li{
  display:flex;
  align-items:baseline;
  gap:12px;
  padding:11px 0;
  border-bottom:1px dashed var(--line-soft);
  color:var(--white);
  font-size:15px;
  line-height:1.5;
}
.page-faq .faq-hero__routes li:last-child{
  border-bottom:0;
}
.page-faq .faq-hero__routes .mono{
  flex:none;
  font-size:12px;
  color:var(--orange);
}
.page-faq .faq-hero__aside-note{
  margin:0;
  font-size:13.5px;
  line-height:1.68;
  color:var(--silver);
}

/* --- 主体骨架 --- */
.page-faq .faq-browse{
  padding:clamp(30px,5vw,66px) 0;
}
.page-faq .faq-shell{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:var(--faq-gap);
}

/* --- 分类侧栏 --- */
.page-faq .faq-rail{
  padding:16px;
  border:2px solid var(--line-soft);
  border-top:3px solid var(--cyan);
  background:rgba(18,36,74,.5);
}
.page-faq .faq-rail__title{
  margin:0 0 10px;
  font-size:12px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--orange);
}
.page-faq .faq-rail__list{
  display:grid;
  margin:0;
  padding:0;
  list-style:none;
}
.page-faq .faq-rail__list a{
  display:block;
  padding:9px 10px;
  border-left:2px solid transparent;
  color:var(--silver);
  font-size:15px;
  text-decoration:none;
  transition:color .18s ease, border-color .18s ease, background-color .18s ease;
}
.page-faq .faq-rail__list a:hover{
  color:var(--white);
  border-left-color:var(--cyan);
  background:var(--cyan-soft);
}
.page-faq .faq-rail__list a:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:2px;
}
.page-faq .faq-rail__note{
  margin:12px 0 0;
  padding-top:10px;
  border-top:1px dashed var(--line-soft);
  font-size:12.5px;
  color:var(--silver);
}

/* --- 问答区块 --- */
.page-faq .faq-block{
  margin:0 0 var(--faq-block-gap);
  scroll-margin-top:calc(var(--header-h) + 26px);
}
.page-faq .faq-block:last-child{
  margin-bottom:0;
}
.page-faq .faq-block__head{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:8px 16px;
  margin-bottom:18px;
  padding-bottom:12px;
  border-bottom:2px solid var(--line-soft);
}
.page-faq .faq-block__num{
  font-size:12px;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--orange);
}
.page-faq .faq-block h2{
  margin:0;
  font-size:clamp(20px,3.4vw,29px);
  line-height:1.24;
  letter-spacing:-.02em;
  color:var(--white);
}
.page-faq .faq-block .measure{
  margin:0 0 18px;
  max-width:64ch;
  color:var(--silver);
  font-size:15.5px;
  line-height:1.75;
}

/* --- 关键词跳转 --- */
.page-faq .faq-tags{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin:0 0 24px;
}
.page-faq a.tag{
  padding:7px 12px;
  border:1px solid var(--line-soft);
  background:rgba(18,36,74,.65);
  color:var(--silver);
  font-size:13px;
  text-decoration:none;
  transition:color .18s ease, border-color .18s ease, background-color .18s ease;
}
.page-faq a.tag:hover{
  color:var(--cyan);
  border-color:var(--cyan);
  background:var(--cyan-soft);
}
.page-faq a.tag:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:2px;
}

/* --- 配图 --- */
.page-faq .faq-figure{
  margin:0;
}
.page-faq .faq-figure--wide{
  margin:4px 0 26px;
}
.page-faq .faq-figure img{
  display:block;
  width:100%;
  max-width:100%;
  height:auto;
  border:2px solid var(--line-soft);
  background:var(--deep-2);
  object-fit:cover;
}
.page-faq .faq-figure figcaption{
  margin-top:10px;
  color:var(--silver);
  font-size:13px;
  line-height:1.62;
}

/* --- 手风琴问答 --- */
.page-faq .faq-item{
  margin-bottom:10px;
  border:2px solid var(--line-soft);
  background:var(--deep-2);
  transition:border-color .2s ease, background-color .2s ease, box-shadow .2s ease, transform .2s ease;
}
.page-faq .faq-item:last-child{
  margin-bottom:0;
}
.page-faq .faq-item summary{
  display:flex;
  align-items:flex-start;
  gap:14px;
  padding:16px 18px;
  color:var(--white);
  font-size:15.5px;
  font-weight:600;
  line-height:1.55;
  cursor:pointer;
  list-style:none;
}
.page-faq .faq-item summary::-webkit-details-marker{
  display:none;
}
.page-faq .faq-item summary::after{
  content:"+";
  flex:none;
  margin-left:auto;
  color:var(--cyan);
  font-family:var(--font-mono);
  font-size:20px;
  line-height:1;
}
.page-faq .faq-item[open] summary{
  padding-bottom:10px;
  color:var(--cyan);
}
.page-faq .faq-item[open] summary::after{
  content:"–";
  color:var(--orange);
}
.page-faq .faq-item:hover{
  border-color:var(--cyan-line);
}
.page-faq .faq-item[open]{
  border-color:var(--cyan-line);
  background:
    linear-gradient(180deg, rgba(0,229,255,.10), rgba(11,27,58,0) 62%),
    var(--deep-2);
  box-shadow:var(--shadow-cyan);
}
.page-faq .faq-item summary:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:-4px;
}
.page-faq .faq-item__no{
  flex:none;
  padding-top:3px;
  color:var(--silver);
  font-size:12px;
}
.page-faq .faq-item[open] .faq-item__no{
  color:var(--orange);
}
.page-faq .faq-item__body{
  padding:0 18px 18px calc(18px + 14px + 26px);
  color:var(--silver);
  font-size:15px;
  line-height:1.78;
}
.page-faq .faq-item__body p{
  margin:0 0 10px;
}
.page-faq .faq-item__body p:last-child{
  margin-bottom:0;
}

/* --- 收束区块 --- */
.page-faq .faq-help{
  padding:clamp(22px,4vw,40px);
  border:2px solid var(--orange);
  background:
    linear-gradient(135deg, rgba(255,107,53,.14), rgba(11,27,58,0) 64%),
    var(--deep-2);
  box-shadow:var(--shadow-orange);
}
.page-faq .faq-help .kicker{
  margin:0 0 4px;
}
.page-faq .faq-help h2{
  margin:6px 0 14px;
  font-size:clamp(22px,3.6vw,32px);
  letter-spacing:-.02em;
  line-height:1.24;
  color:var(--white);
}
.page-faq .faq-help .measure{
  margin:0 0 14px;
  max-width:66ch;
  color:var(--silver);
  font-size:15.5px;
  line-height:1.78;
}
.page-faq .btn-row{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  margin:22px 0 18px;
}
.page-faq .faq-help__links{
  display:grid;
  gap:10px;
  margin:0;
  padding:16px 0 0;
  border-top:1px dashed var(--line-soft);
  list-style:none;
}
.page-faq .faq-help__links a{
  color:var(--cyan);
  font-size:14.5px;
  text-decoration:none;
  border-bottom:1px solid transparent;
}
.page-faq .faq-help__links a:hover{
  border-bottom-color:var(--cyan);
}
.page-faq .faq-help__links a:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:2px;
}

/* --- 平板及以上 --- */
@media (min-width:760px){
  .page-faq .faq-hero__stats{
    gap:16px clamp(28px,5vw,52px);
  }
  .page-faq .faq-tags{
    gap:10px;
  }
  .page-faq .faq-item__body{
    padding-right:clamp(24px,6vw,64px);
  }
}

/* --- 桌面：左锚点 + 右手风琴 --- */
@media (min-width:1000px){
  .page-faq .faq-hero__grid{
    grid-template-columns:minmax(0,1.4fr) minmax(0,.9fr);
    align-items:end;
  }
  .page-faq .faq-shell{
    grid-template-columns:236px minmax(0,1fr);
    gap:clamp(28px,4.5vw,62px);
  }
  .page-faq .faq-rail{
    position:sticky;
    top:calc(var(--header-h) + 20px);
    align-self:start;
  }
  .page-faq .faq-block__head{
    gap:8px 20px;
  }
}

/* --- 降低动态偏好 --- */
@media (prefers-reduced-motion: reduce){
  .page-faq .faq-item,
  .page-faq a.tag,
  .page-faq .faq-rail__list a{
    transition:none;
  }
  .page-faq .faq-hero::after{
    background:linear-gradient(160deg, rgba(0,229,255,.14), rgba(255,107,53,.10) 58%, transparent 86%);
  }
}