/* ===== 页面：FAQ 支持中心 ===== */
.page-faq{
  --faq-gold-grad: linear-gradient(90deg, var(--milano-gold), rgba(255, 215, 0, 0));
  --faq-red-soft: rgba(213, 0, 0, 0.12);
  --faq-line-dim: rgba(255, 215, 0, 0.16);
  background: var(--night-black);
  color: var(--soft-white);
  overflow-x: hidden;
}

/* ---------- 页头区域 ---------- */
.page-faq .faq-hero{
  position: relative;
  padding: 40px 16px 56px;
  border-bottom: 1px solid var(--faq-line-dim);
  background:
    radial-gradient(1200px 420px at 85% -10%, rgba(139, 0, 0, 0.55), transparent 60%),
    linear-gradient(160deg, #1a1414 0%, var(--night-black) 70%);
  overflow: hidden;
}

.page-faq .faq-hero::before{
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 215, 0, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 215, 0, 0.05) 1px, transparent 1px);
  background-size: 28px 28px;
  pointer-events: none;
}

.page-faq .faq-hero::after{
  content: "";
  position: absolute;
  right: -70px;
  bottom: -60px;
  width: 260px;
  height: 260px;
  background: linear-gradient(135deg, rgba(213, 0, 0, 0.32), transparent 70%);
  transform: rotate(22deg);
  clip-path: polygon(0 100%, 100% 0, 100% 100%);
  pointer-events: none;
}

.page-faq .faq-hero-inner{
  position: relative;
  z-index: 1;
  max-width: var(--container-width);
  margin: 0 auto;
}

.page-faq .breadcrumb{
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: rgba(240, 240, 240, 0.58);
  margin-bottom: 28px;
}

.page-faq .breadcrumb a{
  color: var(--line-gold);
  text-decoration: none;
  transition: color 0.2s ease;
}

.page-faq .breadcrumb a:hover{
  color: var(--milano-gold);
}

.page-faq .faq-kicker{
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.3em;
  color: var(--milano-gold);
  border: 1px solid rgba(255, 215, 0, 0.45);
  padding: 6px 14px;
  margin-bottom: 18px;
}

.page-faq .faq-hero-title{
  font-family: var(--font-heading);
  font-weight: 900;
  font-style: italic;
  font-size: clamp(2.2rem, 5vw, 4rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--pure-white);
  margin: 0 0 16px;
}

.page-faq .faq-hero-desc{
  font-size: 15px;
  line-height: 1.75;
  color: rgba(240, 240, 240, 0.78);
  max-width: 64ch;
}

.page-faq .faq-hero-meta{
  display: flex;
  flex-wrap: wrap;
  gap: 14px 22px;
  margin-top: 24px;
  font-family: var(--font-heading);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: rgba(255, 255, 255, 0.45);
}

.page-faq .faq-hero-meta span::before{
  content: "— ";
  color: var(--milano-gold);
}

/* ---------- 主体布局 ---------- */
.page-faq .faq-layout{
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 36px;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 16px 64px;
}

/* ---------- 侧边栏 ---------- */
.page-faq .faq-sidebar{
  display: flex;
  flex-direction: column;
  gap: 20px;
  min-width: 0;
}

.page-faq .faq-toc-card{
  position: relative;
  background: var(--card-gray);
  border: 1px solid var(--faq-line-dim);
  padding: 22px 20px;
  box-shadow: 4px 4px 0 rgba(255, 215, 0, 0.06);
}

.page-faq .faq-toc-card::before{
  content: "";
  position: absolute;
  left: -1px;
  top: 22px;
  bottom: 22px;
  width: 3px;
  background: linear-gradient(180deg, var(--milano-gold), var(--brand-red));
}

.page-faq .faq-toc-head{
  font-family: var(--font-heading);
  font-weight: 900;
  font-style: italic;
  font-size: 20px;
  color: var(--pure-white);
  margin: 0 0 2px;
}

.page-faq .faq-toc-sub{
  display: block;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: rgba(240, 240, 240, 0.52);
  text-transform: uppercase;
  margin-bottom: 18px;
}

.page-faq .faq-toc{
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-faq .toc-link{
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 12px;
  font-size: 14px;
  color: var(--soft-white);
  text-decoration: none;
  border-left: 2px solid rgba(255, 255, 255, 0.2);
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.page-faq .toc-num{
  font-family: var(--font-heading);
  font-weight: 900;
  font-style: italic;
  font-size: 18px;
  color: var(--brand-red);
  transition: color 0.2s ease;
}

.page-faq .toc-link:hover,
.page-faq .toc-link.is-active{
  background: var(--faq-red-soft);
  border-left-color: var(--milano-gold);
  color: var(--pure-white);
}

.page-faq .toc-link:hover .toc-num,
.page-faq .toc-link.is-active .toc-num{
  color: var(--milano-gold);
}

.page-faq .faq-side-img{
  background: var(--card-gray);
  border: 1px solid var(--faq-line-dim);
  padding: 6px;
}

.page-faq .faq-side-img img{
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1/1;
  object-fit: cover;
}

.page-faq .faq-quick{
  background: linear-gradient(135deg, rgba(139, 0, 0, 0.4), rgba(18, 18, 18, 0.85));
  border: 1px solid rgba(213, 0, 0, 0.42);
  padding: 18px 16px;
}

.page-faq .faq-quick-label{
  display: block;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--milano-gold);
  margin-bottom: 10px;
}

.page-faq .faq-quick a{
  display: block;
  padding: 7px 0;
  color: var(--soft-white);
  text-decoration: none;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.16);
  font-size: 14px;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.page-faq .faq-quick a:last-child{
  border-bottom: none;
}

.page-faq .faq-quick a:hover{
  color: var(--milano-gold);
  padding-left: 6px;
}

/* ---------- 内容区与章节 ---------- */
.page-faq .faq-content{
  display: flex;
  flex-direction: column;
  gap: 56px;
  min-width: 0;
}

.page-faq .faq-section{
  scroll-margin-top: 140px;
}

.page-faq .faq-section-head{
  display: flex;
  align-items: flex-start;
  gap: 16px;
  border-bottom: 1px solid var(--faq-line-dim);
  padding-bottom: 16px;
  margin-bottom: 22px;
}

.page-faq .faq-section-num{
  font-family: var(--font-heading);
  font-weight: 900;
  font-style: italic;
  font-size: 52px;
  line-height: 0.85;
  color: rgba(213, 0, 0, 0.55);
  min-width: 64px;
}

.page-faq .faq-section-title{
  font-family: var(--font-heading);
  font-weight: 900;
  font-style: italic;
  font-size: 28px;
  color: var(--pure-white);
  margin: 0 0 4px;
}

.page-faq .faq-section-sub{
  font-size: 14px;
  color: rgba(240, 240, 240, 0.62);
  margin: 0;
}

/* ---------- 手风琴面板 ---------- */
.page-faq .faq-accordion{
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.page-faq .faq-panel{
  position: relative;
  background: var(--card-gray);
  border: 1px solid var(--faq-line-dim);
  border-left: 3px solid var(--brand-red);
  box-shadow: 3px 3px 0 rgba(255, 215, 0, 0.05);
  transition: border-color 0.25s ease, background 0.25s ease;
}

.page-faq .faq-panel[open]{
  background: linear-gradient(135deg, #201b1a, var(--card-gray));
  border-color: rgba(255, 215, 0, 0.38);
  border-left-color: var(--milano-gold);
}

.page-faq .faq-panel::before{
  content: "S·01";
  position: absolute;
  top: -1px;
  right: 26px;
  z-index: 2;
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 11px;
  letter-spacing: 0.16em;
  padding: 4px 12px 4px 18px;
  color: var(--night-black);
  background: linear-gradient(90deg, var(--milano-gold), var(--line-gold));
  clip-path: polygon(12px 0, 100% 0, calc(100% - 6px) 100%, 0 100%);
}

.page-faq .sect-nav .faq-panel::before{ content: "S·02"; }
.page-faq .sect-data .faq-panel::before{ content: "S·03"; }
.page-faq .sect-device .faq-panel::before{ content: "S·04"; }

.page-faq .faq-question{
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 52px 18px 18px;
  cursor: pointer;
  list-style: none;
  user-select: none;
  transition: color 0.2s ease;
}

.page-faq .faq-question::-webkit-details-marker{
  display: none;
}

.page-faq .faq-question:focus-visible{
  outline: 2px solid var(--milano-gold);
  outline-offset: -2px;
}

.page-faq .faq-mark{
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-weight: 900;
  font-style: italic;
  font-size: 16px;
}

.page-faq .q-mark{
  color: var(--brand-red);
  background: var(--faq-red-soft);
  border: 1px solid rgba(213, 0, 0, 0.32);
}

.page-faq .a-mark{
  color: var(--milano-gold);
  background: rgba(255, 215, 0, 0.1);
  border: 1px solid rgba(255, 215, 0, 0.3);
  font-size: 13px;
  margin-top: 2px;
}

.page-faq .faq-question-text{
  flex: 1;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 16px;
  line-height: 1.4;
  color: var(--pure-white);
  transition: color 0.2s ease;
}

.page-faq .faq-panel:hover .faq-question-text{
  color: var(--milano-gold);
}

.page-faq .faq-toggle{
  flex-shrink: 0;
  position: absolute;
  right: 20px;
  top: 50%;
  width: 18px;
  height: 18px;
  margin-top: -9px;
}

.page-faq .faq-toggle::before,
.page-faq .faq-toggle::after{
  content: "";
  position: absolute;
  background: var(--milano-gold);
  transition: transform 0.25s ease, opacity 0.2s ease;
}

.page-faq .faq-toggle::before{
  top: 8px;
  left: 0;
  width: 18px;
  height: 2px;
}

.page-faq .faq-toggle::after{
  top: 0;
  left: 8px;
  width: 2px;
  height: 18px;
}

.page-faq .faq-panel[open] .faq-toggle::after{
  transform: rotate(90deg);
  opacity: 0;
}

.page-faq .faq-answer{
  display: flex;
  gap: 14px;
  border-top: 1px solid rgba(255, 215, 0, 0.12);
  padding: 16px 18px 20px;
}

.page-faq .faq-answer p{
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(240, 240, 240, 0.82);
}

.page-faq .faq-answer a{
  color: var(--milano-gold);
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* ---------- 底部 CTA ---------- */
.page-faq .faq-bottom-cta{
  position: relative;
  background:
    radial-gradient(900px 300px at 90% 0%, rgba(139, 0, 0, 0.5), transparent 65%),
    var(--card-gray);
  border-top: 1px solid var(--faq-line-dim);
  padding: 48px 16px 56px;
}

.page-faq .faq-bottom-cta::before{
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 8px;
  background: linear-gradient(90deg, var(--brand-red), var(--milano-gold) 40%, transparent 100%);
  clip-path: polygon(0 0, 100% 0, calc(100% - 80px) 100%, 0 100%);
}

.page-faq .faq-cta-grid{
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  align-items: center;
  max-width: var(--container-width);
  margin: 0 auto;
}

.page-faq .faq-cta-img img{
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2/1;
  object-fit: cover;
  border: 1px solid rgba(255, 215, 0, 0.2);
}

.page-faq .faq-cta-kicker{
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--milano-gold);
  border: 1px solid rgba(255, 215, 0, 0.4);
  padding: 4px 12px;
  margin-bottom: 14px;
}

.page-faq .faq-cta-copy h2{
  font-family: var(--font-heading);
  font-weight: 900;
  font-style: italic;
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  color: var(--pure-white);
  margin: 0 0 12px;
}

.page-faq .faq-cta-copy p{
  font-size: 14px;
  line-height: 1.8;
  color: rgba(240, 240, 240, 0.78);
  margin: 0 0 20px;
  max-width: 52ch;
}

.page-faq .faq-cta-copy a{
  color: var(--milano-gold);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.page-faq .faq-cta-copy .btn-gold{
  margin-top: 4px;
}

/* ---------- 媒体查询：平板及以上 ---------- */
@media (min-width: 760px){
  .page-faq .faq-hero{
    padding: 52px 24px 64px;
  }

  .page-faq .faq-layout{
    padding: 56px 24px 72px;
  }

  .page-faq .faq-cta-grid{
    grid-template-columns: 300px minmax(0, 1fr);
    gap: 44px;
  }
}

/* ---------- 媒体查询：桌面 ---------- */
@media (min-width: 960px){
  .page-faq .faq-layout{
    grid-template-columns: 300px minmax(0, 1fr);
    gap: 52px;
    padding: 64px 24px 88px;
  }

  .page-faq .faq-sidebar{
    position: sticky;
    top: calc(var(--header-height) + 28px);
    align-self: start;
  }

  .page-faq .faq-section-head{
    margin-bottom: 28px;
  }

  .page-faq .faq-section-num{
    font-size: 60px;
  }

  .page-faq .faq-bottom-cta{
    padding: 56px 24px 64px;
  }
}