.page-faq{
  --faq-radius: 22px;
  --faq-card-pad: clamp(1.25rem, 3vw, 2.5rem);
  --faq-shadow: 0 18px 50px rgba(4, 12, 28, 0.45);
  background: var(--c-ink);
}

/* ========== 首屏头部 ========== */
.page-faq .faq-hero{
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(ellipse at 85% 15%, rgba(198, 255, 0, 0.08), transparent 42%),
    linear-gradient(135deg, var(--c-ink) 0%, var(--c-night) 100%);
  border-bottom: 1px solid var(--glass-brd);
  padding: clamp(3.5rem, 8vw, 6.5rem) 0 clamp(2.5rem, 6vw, 4.5rem);
}

.page-faq .faq-hero::before{
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.3;
  background-image:
    linear-gradient(rgba(198, 255, 0, 0.09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(198, 255, 0, 0.07) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
}

.page-faq .faq-hero__inner{
  position: relative;
  display: grid;
  gap: 2rem;
  align-items: center;
}

.page-faq .faq-hero__copy{
  z-index: 1;
}

.page-faq .faq-hero__eyebrow{
  font-family: var(--font-num);
  font-size: 0.8rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--c-gold);
  margin: 0 0 0.75rem;
}

.page-faq .faq-hero h1{
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(2.2rem, 6vw, 4.6rem);
  line-height: 1.05;
  margin: 0 0 1.2rem;
  color: var(--c-white);
}

.page-faq .faq-h1-main{
  display: block;
  color: var(--c-lime);
  text-shadow: 0 2px 0 rgba(0, 0, 0, 0.25);
}

.page-faq .faq-h1-sub{
  display: block;
  font-size: 0.44em;
  font-weight: 700;
  color: var(--c-paper);
  margin-top: 0.6rem;
  letter-spacing: 0.02em;
}

.page-faq .faq-hero__copy .lead{
  max-width: 64ch;
  color: var(--c-steel);
  margin: 0;
}

.page-faq .faq-quicknav{
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1.8rem;
}

.page-faq .faq-quicknav .tag{
  text-decoration: none;
  padding: 0.5rem 0.95rem;
  border-radius: var(--radius-pill);
  background: rgba(11, 30, 58, 0.78);
  border: 1px solid rgba(176, 196, 222, 0.3);
  color: var(--c-steel);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 0.85rem;
  transition: background-color var(--transition), border-color var(--transition), color var(--transition), transform var(--transition);
}

.page-faq .faq-quicknav .tag:hover,
.page-faq .faq-quicknav .tag:focus-visible{
  background: var(--c-lime);
  border-color: var(--c-lime);
  color: var(--c-ink);
  transform: translateY(-2px);
}

.page-faq .faq-quicknav .tag--gold{
  background: rgba(245, 197, 24, 0.16);
  border-color: rgba(245, 197, 24, 0.65);
  color: var(--c-gold);
}

.page-faq .faq-hero__visual{
  position: relative;
  min-height: 220px;
  display: none;
}

.page-faq .faq-hero__grid{
  position: absolute;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.page-faq .faq-hero__stamp{
  position: absolute;
  right: 4%;
  top: 8%;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(4rem, 12vw, 8rem);
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px rgba(198, 255, 0, 0.35);
  opacity: 0.8;
  user-select: none;
}

/* ========== 主体双栏布局 ========== */
.page-faq .faq-wrap{
  display: grid;
  gap: 3rem;
  align-items: start;
  padding-top: clamp(2.5rem, 6vw, 4.5rem);
  padding-bottom: clamp(3rem, 7vw, 5rem);
  background: linear-gradient(180deg, rgba(13, 43, 82, 0.35) 0%, rgba(11, 30, 58, 0) 22%);
}

.page-faq .faq-side{
  display: none;
}

.page-faq .faq-side__inner{
  position: sticky;
  top: calc(var(--header-total) + 28px);
  padding: 1.5rem 1.4rem;
  border-radius: var(--radius-lg);
  background: var(--glass-bg);
  border: 1px solid var(--glass-brd);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--faq-shadow);
}

.page-faq .faq-side__title{
  font-family: var(--font-head);
  color: var(--c-paper);
  font-size: 0.95rem;
  margin: 0 0 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.page-faq .faq-side__title::before{
  content: "";
  width: 10px;
  height: 10px;
  background: var(--c-lime);
  border-radius: 3px;
  flex: none;
}

.page-faq .faq-side__list{
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.35rem;
}

.page-faq .faq-side__list li{
  border-bottom: 1px dashed rgba(176, 196, 222, 0.15);
}

.page-faq .faq-side__list a{
  display: flex;
  gap: 0.75rem;
  align-items: center;
  padding: 0.6rem 0.35rem;
  text-decoration: none;
  color: var(--c-steel);
  font-family: var(--font-head);
  font-size: 0.87rem;
  transition: color var(--transition), padding-left var(--transition);
}

.page-faq .faq-side__list a:hover,
.page-faq .faq-side__list a:focus-visible{
  color: var(--c-lime);
  padding-left: 0.7rem;
}

.page-faq .faq-side__list a span{
  font-family: var(--font-num);
  color: var(--c-gold);
  font-size: 0.8rem;
}

.page-faq .faq-side__note{
  margin-top: 1.5rem;
  padding-top: 1.2rem;
  border-top: 1px solid rgba(176, 196, 222, 0.18);
  display: grid;
  gap: 0.75rem;
}

.page-faq .faq-side__note p{
  margin: 0;
  color: var(--c-steel);
  font-size: 0.85rem;
  font-family: var(--font-body);
}

.page-faq .faq-side__note .btn{
  justify-content: center;
  text-decoration: none;
}

/* ========== 问答分区 ========== */
.page-faq .faq-sections{
  counter-reset: faq;
  display: grid;
  gap: clamp(1.6rem, 4vw, 3.2rem);
}

.page-faq .faq-section{
  position: relative;
  padding: var(--faq-card-pad);
  background: linear-gradient(145deg, rgba(13, 43, 82, 0.55), rgba(11, 30, 58, 0.35));
  border: 1px solid var(--glass-brd);
  border-radius: var(--faq-radius);
  overflow: hidden;
  box-shadow: var(--faq-shadow), 0 0 0 1px rgba(198, 255, 0, 0.04) inset;
}

.page-faq .faq-section::before{
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 100%;
  height: 100%;
  background-image:
    linear-gradient(rgba(198, 255, 0, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(198, 255, 0, 0.04) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
  opacity: 0.5;
}

.page-faq .faq-section__head{
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.4rem 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid rgba(176, 196, 222, 0.2);
  margin-bottom: 1.4rem;
}

.page-faq .faq-section__title{
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  color: var(--c-lime);
  margin: 0;
  letter-spacing: -0.01em;
  counter-increment: faq;
}

.page-faq .faq-section__title::before{
  content: counter(faq, decimal-leading-zero) "  ";
  color: var(--c-gold);
  font-family: var(--font-num);
  font-size: 0.6em;
  vertical-align: baseline;
}

.page-faq .faq-section__anno{
  font-family: var(--font-num);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--c-gold);
  background: rgba(245, 197, 24, 0.14);
  border: 1px solid rgba(245, 197, 24, 0.3);
  padding: 0.3rem 0.75rem;
  border-radius: 999px;
}

.page-faq .faq-section__body{
  position: relative;
  display: grid;
  gap: 2rem;
}

/* ========== 手风琴折叠项 ========== */
.page-faq .faq-accordion{
  display: grid;
  gap: 0.9rem;
}

.page-faq .faq-item{
  background: rgba(11, 30, 58, 0.6);
  border: 1px solid rgba(176, 196, 222, 0.18);
  border-radius: 16px;
  padding: 0.2rem 0.25rem;
  transition: border-color var(--transition), background-color var(--transition);
}

.page-faq .faq-item[open]{
  background: rgba(11, 30, 58, 0.85);
  border-color: rgba(198, 255, 0, 0.35);
}

.page-faq .faq-item__q{
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.9rem;
  padding: 1rem 1.1rem;
  border-radius: 16px;
  font-family: var(--font-head);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--c-white);
  margin: 0;
}

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

.page-faq .faq-item__q:hover,
.page-faq .faq-item__q:focus-visible{
  color: var(--c-lime);
}

.page-faq .faq-item__text{
  flex: 1;
}

.page-faq .faq-item__icon{
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: rgba(198, 255, 0, 0.12);
  color: var(--c-lime);
  flex: none;
}

.page-faq .faq-item__icon svg{
  width: 18px;
  height: 18px;
}

.page-faq .faq-item__toggle{
  position: relative;
  width: 18px;
  height: 18px;
  flex: none;
}

.page-faq .faq-item__toggle::before,
.page-faq .faq-item__toggle::after{
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 14px;
  height: 2px;
  background: var(--c-gold);
  border-radius: 2px;
  transition: transform var(--transition), background-color var(--transition);
}

.page-faq .faq-item__toggle::after{
  transform: translate(-50%, -50%) rotate(90deg);
}

.page-faq .faq-item[open] .faq-item__toggle::after{
  transform: translate(-50%, -50%) rotate(0);
}

.page-faq .faq-item__a{
  margin: 0.4rem 1rem 1rem calc(38px + 1.8rem);
  padding: 1.1rem 1.25rem;
  background: var(--c-paper);
  color: var(--c-charcoal);
  border-radius: 14px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  line-height: 1.8;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.22);
}

.page-faq .faq-item__a p{
  margin: 0 0 0.6rem;
}

.page-faq .faq-item__a p:last-child{
  margin-bottom: 0;
}

.page-faq .faq-item__a .link-arrow{
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--c-ink);
  font-family: var(--font-head);
  font-size: 0.82rem;
  font-weight: 700;
  text-decoration: none;
  border-bottom: 1px solid rgba(18, 18, 18, 0.35);
  padding-bottom: 0.1rem;
  transition: color var(--transition), border-color var(--transition);
}

.page-faq .faq-item__a .link-arrow::after{
  content: "→";
  transition: transform var(--transition);
}

.page-faq .faq-item__a .link-arrow:hover,
.page-faq .faq-item__a .link-arrow:focus-visible{
  color: var(--c-night);
  border-color: var(--c-night);
}

.page-faq .faq-item__a .link-arrow:hover::after{
  transform: translateX(2px);
}

.page-faq .faq-item[open] .faq-item__a{
  animation: pageFaqReveal 0.35s cubic-bezier(0.22, 1, 0.36, 1) both;
}

@keyframes pageFaqReveal{
  from{
    opacity: 0;
    transform: translateY(-6px);
  }
  to{
    opacity: 1;
    transform: translateY(0);
  }
}

/* ========== 配图与说明 ========== */
.page-faq .faq-figure{
  margin: 0;
  align-self: center;
}

.page-faq .faq-figure img{
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: var(--faq-shadow);
}

.page-faq .faq-figure figcaption{
  margin-top: 0.7rem;
  font-family: var(--font-num);
  font-size: 0.74rem;
  letter-spacing: 0.02em;
  color: var(--c-steel);
  text-align: center;
}

.page-faq .faq-figure--sync{
  max-width: 420px;
  margin-left: auto;
  margin-right: auto;
}

/* ========== 桌面端增强 ========== */
@media (min-width: 900px){
  .page-faq .faq-hero__inner{
    grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.9fr);
  }

  .page-faq .faq-hero__visual{
    display: block;
  }

  .page-faq .faq-wrap{
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 3rem;
  }

  .page-faq .faq-side{
    display: block;
  }

  .page-faq .faq-section__body--split{
    grid-template-columns: minmax(0, 1fr) minmax(260px, 42%);
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce){
  .page-faq .faq-item[open] .faq-item__a{
    animation: none;
  }

  .page-faq .faq-quicknav .tag,
  .page-faq .faq-side__list a,
  .page-faq .faq-item__q,
  .page-faq .faq-item__toggle::before,
  .page-faq .faq-item__toggle::after,
  .page-faq .faq-item__a .link-arrow::after{
    transition: none;
  }
}