.page-faq{
  background-color: var(--color-beige);
}

/* ========== 帮助中心页头 ========== */
.page-faq .faq-hero{
  position: relative;
  background-color: var(--color-navy);
  background-image:
    linear-gradient(rgba(201,169,97,.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(201,169,97,.08) 1px, transparent 1px);
  background-size: 26px 26px;
  padding: 56px 0 48px;
  border-bottom: 3px solid var(--color-gold);
}
.page-faq .faq-hero::after{
  content: "FAQ / QUESTION / 4.8";
  position: absolute;
  right: 20px;
  bottom: 16px;
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .18em;
  color: rgba(201,169,97,.5);
}
.page-faq .faq-eyebrow{
  font-family: var(--font-mono);
  font-size: .8125rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--color-gold);
}
.page-faq .faq-hero h1{
  font-family: var(--font-head);
  font-size: clamp(2.4rem, 5vw, 4rem);
  line-height: 1.1;
  color: var(--color-beige);
  margin: 10px 0 18px;
}
.page-faq .faq-hero-desc{
  max-width: 660px;
  color: rgba(245,241,232,.86);
  font-size: 1rem;
}
.page-faq .faq-hero-desc a{
  color: var(--color-gold);
  text-underline-offset: 4px;
}

/* ========== 速查索引 ========== */
.page-faq .faq-index-nav{
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 36px;
  padding-top: 24px;
  border-top: 1px solid rgba(201,169,97,.3);
}
.page-faq .faq-index-label{
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--color-gold);
}
.page-faq .faq-index-list{
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-faq .faq-index-link{
  display: inline-block;
  font-family: var(--font-head);
  font-weight: 500;
  font-size: .875rem;
  color: var(--color-beige);
  text-decoration: none;
  border: 1px solid rgba(201,169,97,.45);
  padding: 6px 12px;
  transition: background-color .2s ease, color .2s ease, border-color .2s ease;
}
.page-faq .faq-index-link:hover,
.page-faq .faq-index-link:focus-visible{
  background-color: var(--color-gold);
  border-color: var(--color-gold);
  color: var(--color-navy);
}

/* ========== 区块标题 ========== */
.page-faq .faq-sec-headline{
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 8px;
}
.page-faq .section-index{
  font-family: var(--font-mono);
  font-size: .8125rem;
  letter-spacing: .12em;
  color: var(--color-gold);
}

/* ========== 手风琴基础 ========== */
.page-faq .faq-featured-list{
  margin-top: 28px;
}
.page-faq .faq-details{
  border: 1px solid var(--color-mist);
  border-left: 3px solid var(--color-line);
  background-color: rgba(255,255,255,.62);
  margin-bottom: var(--sp-3);
  transition: border-color .2s ease;
}
.page-faq .faq-details[open]{
  border-left-color: var(--color-gold);
}
.page-faq .faq-summary{
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-3) var(--sp-4);
  cursor: pointer;
  list-style: none;
}
.page-faq .faq-summary::-webkit-details-marker{
  display: none;
}
.page-faq .faq-qnum{
  flex: none;
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: .8125rem;
  letter-spacing: .04em;
  color: var(--color-line);
  border: 1px solid var(--color-line);
  transition: transform .2s ease, background-color .2s ease, color .2s ease;
}
.page-faq .faq-summary:hover .faq-qnum{
  transform: translateX(-4px);
}
.page-faq .faq-details[open] .faq-qnum{
  color: var(--color-navy);
  background-color: var(--color-gold);
  border-color: var(--color-gold);
}
.page-faq .faq-qtitle{
  flex: 1;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 1rem;
  line-height: 1.5;
  color: var(--color-ink);
}
.page-faq .faq-icon{
  flex: none;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-line);
  color: var(--color-gold);
  font-family: var(--font-mono);
  font-size: 1rem;
  line-height: 1;
  transition: transform .25s ease;
}
.page-faq .faq-details[open] .faq-icon{
  transform: rotate(45deg);
}
.page-faq .faq-answer{
  margin: 0 var(--sp-4) var(--sp-4);
  padding: var(--sp-3) var(--sp-3) 0;
  border-top: 1px dashed var(--color-mist);
  border-left: 2px solid var(--color-line);
  color: var(--color-ink);
  font-size: .9375rem;
}
.page-faq .faq-answer p{
  margin: 0 0 var(--sp-2);
}
.page-faq .faq-answer p:last-child{
  margin-bottom: 0;
}
.page-faq .faq-answer a{
  color: var(--color-link);
  text-underline-offset: 3px;
}

/* ========== 按主题浏览 ========== */
.page-faq .faq-topic-layout{
  margin-top: 28px;
}
.page-faq .faq-topic-rail{
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
}
.page-faq .faq-rail-note{
  width: 100%;
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--color-moss);
}
.page-faq .faq-topic-link{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-head);
  font-weight: 500;
  font-size: .875rem;
  color: var(--color-ink);
  text-decoration: none;
  border: 1px solid var(--color-line);
  background-color: rgba(255,255,255,.55);
  padding: 10px 14px;
  transition: border-color .2s ease, background-color .2s ease;
}
.page-faq .faq-topic-link:hover,
.page-faq .faq-topic-link:focus-visible{
  border-color: var(--color-gold);
  background-color: rgba(201,169,97,.12);
}
.page-faq .faq-topic-num{
  font-family: var(--font-mono);
  font-size: .75rem;
  color: var(--color-gold);
}
.page-faq .faq-topic-block{
  margin-bottom: var(--sp-5);
}
.page-faq .faq-topic-title{
  font-family: var(--font-head);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-navy);
  padding-bottom: 10px;
  margin-bottom: var(--sp-3);
  border-bottom: 2px double var(--color-line);
}

/* ========== 装机排障信息图 ========== */
.page-faq .faq-diag-grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-4);
  margin: var(--sp-5) 0;
  padding: var(--sp-4);
  border: 1px solid var(--color-line);
  background-color: rgba(255,255,255,.55);
}
.page-faq .faq-diag-title{
  font-family: var(--font-head);
  font-size: 1rem;
  color: var(--color-navy);
  margin: 0 0 var(--sp-3);
}
.page-faq .faq-diag-steps{
  margin: 0;
  padding: 0 0 0 var(--sp-4);
  display: grid;
  gap: var(--sp-2);
  color: var(--color-ink);
}
.page-faq .faq-diag-figure{
  margin: 0;
}
.page-faq .faq-diag-figure img{
  display: block;
  max-width: 100%;
  height: auto;
}
.page-faq .faq-diag-figure figcaption{
  font-family: var(--font-mono);
  font-size: .75rem;
  color: var(--color-moss);
  margin-top: var(--sp-2);
}

/* ========== 帮助文档下载 ========== */
.page-faq .faq-download-grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-5);
  margin-top: 28px;
}
.page-faq .faq-download-desc{
  color: var(--color-ink);
}
.page-faq .faq-download-desc a{
  color: var(--color-link);
  text-underline-offset: 3px;
}
.page-faq .faq-filelist{
  list-style: none;
  margin: var(--sp-4) 0;
  padding: 0;
  border-top: 1px solid var(--color-line);
}
.page-faq .faq-file-item{
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  padding: var(--sp-3) 0;
  border-bottom: 1px solid var(--color-line);
}
.page-faq .faq-file-type{
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .1em;
  color: var(--color-gold);
  background-color: var(--color-navy);
  padding: 2px 6px;
}
.page-faq .faq-file-link{
  font-family: var(--font-mono);
  font-size: .875rem;
  line-height: 1.5;
  color: var(--color-link);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  overflow-wrap: anywhere;
  transition: color .2s ease, border-color .2s ease;
}
.page-faq .faq-file-link:hover{
  color: var(--color-navy);
  border-bottom-color: var(--color-gold);
}
.page-faq .faq-file-meta{
  font-family: var(--font-head);
  font-size: .8125rem;
  color: var(--color-moss);
}
.page-faq .faq-backup-tip{
  border-left: 3px solid var(--color-gold);
  background-color: rgba(201,169,97,.1);
  padding: var(--sp-3) var(--sp-4);
  color: var(--color-ink);
  font-size: .9375rem;
}
.page-faq .faq-backup-tip strong{
  font-family: var(--font-head);
  color: var(--color-navy);
}
.page-faq .faq-doc-figure{
  margin: 0;
  background-color: var(--color-navy);
  background-image:
    linear-gradient(rgba(201,169,97,.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(201,169,97,.06) 1px, transparent 1px);
  background-size: 20px 20px;
  padding: var(--sp-4);
  border-top: 3px solid var(--color-gold);
}
.page-faq .faq-doc-figure img{
  display: block;
  max-width: 100%;
  height: auto;
}
.page-faq .faq-doc-figure figcaption{
  font-family: var(--font-mono);
  font-size: .8125rem;
  color: var(--color-gold);
  margin-top: var(--sp-2);
}

/* ========== 桌面端布局 ========== */
@media (min-width: 900px){
  .page-faq .faq-topic-rail{
    flex-direction: column;
    position: sticky;
    top: 24px;
    align-self: start;
  }
  .page-faq .faq-topic-link{
    justify-content: space-between;
  }
  .page-faq .faq-answer{
    margin: 0 var(--sp-4) var(--sp-4) calc(var(--sp-4) + 42px);
    padding-left: var(--sp-4);
  }
  .page-faq .faq-diag-grid{
    grid-template-columns: minmax(0, 1fr) 260px;
    align-items: start;
  }
}

@media (min-width: 960px){
  .page-faq .faq-download-grid{
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: start;
  }
}