/* ========================================================== */
/* FAQ 页面专属样式（作用域 .page-faq）                           */
/* ========================================================== */

.page-faq {
  --faq-line: rgba(0, 168, 255, 0.22);
  --faq-line-strong: rgba(0, 168, 255, 0.45);
  --faq-muted: rgba(245, 247, 250, 0.64);
  --faq-live: #39FF14;
  --faq-orange: #FF7A00;
  position: relative;
  overflow-x: hidden;
}

/* ---------- 页面标题区 ---------- */
.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  padding: 2.25rem 0 2.5rem;
  border-bottom: 1px solid var(--faq-line-strong);
  background:
    radial-gradient(circle at 84% 18%, rgba(0, 168, 255, 0.16), transparent 42%),
    repeating-linear-gradient(90deg, rgba(0, 168, 255, 0.035) 0 1px, transparent 1px 48px),
    var(--bg-deep);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "FAQ";
  position: absolute;
  z-index: 0;
  right: -0.05em;
  bottom: -0.2em;
  font-family: var(--font-numeric);
  font-size: min(12vw, 11rem);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.04em;
  color: rgba(0, 168, 255, 0.05);
  pointer-events: none;
}

.page-faq .faq-hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 1.25rem;
}

.page-faq .breadcrumb {
  margin: 0 0 1.5rem;
}

.page-faq .faq-hero-copy {
  max-width: 68ch;
}

.page-faq .faq-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin: 0 0 0.9rem;
  padding: 0.22rem 0.6rem;
  font-family: var(--font-numeric);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--faq-live);
  border: 1px solid rgba(57, 255, 20, 0.35);
  background: rgba(57, 255, 20, 0.05);
  transform: skewX(-8deg);
}

.page-faq .faq-hero-title {
  margin: 0 0 1rem;
  font-family: var(--font-primary);
  font-size: clamp(1.85rem, 5.2vw, 2.9rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--text-silver);
}

.page-faq .faq-hero-sub {
  margin: 0;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--faq-muted);
  max-width: 56ch;
}

.page-faq .faq-hero-extra {
  display: none;
}

/* ---------- 筛选栏 ---------- */
.page-faq .faq-filterbar {
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--faq-line);
  background:
    linear-gradient(120deg, rgba(0, 168, 255, 0.07) 0%, transparent 42%, transparent 78%, rgba(0, 168, 255, 0.06) 100%),
    rgba(10, 14, 39, 0.82);
}

.page-faq .faq-filter-inner {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

.page-faq .faq-filter-label {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-numeric);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--primary-blue);
}

.page-faq .faq-filter-label::before {
  content: "//";
  color: var(--faq-live);
}

.page-faq .faq-filter-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.page-faq .exhibit-tag {
  font-family: var(--font-primary);
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.page-faq .exhibit-tag.is-active {
  background: var(--primary-blue);
  border-color: var(--primary-blue);
  color: #0A0E27;
}

/* ---------- 问答主体布局 ---------- */
.page-faq .faq-content {
  padding-bottom: 0.5rem;
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
}

.page-faq .faq-sections {
  display: grid;
  gap: 2rem;
  margin-top: 2rem;
}

/* ---------- 问题版块 ---------- */
.page-faq .faq-section {
  position: relative;
  padding: 1.15rem 1rem 0.8rem;
  border: 1px solid var(--faq-line-strong);
  background:
    linear-gradient(135deg, rgba(0, 168, 255, 0.05), transparent 46%),
    rgba(28, 31, 54, 0.56);
}

.page-faq .faq-section::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  width: 30px;
  height: 30px;
  background: var(--primary-blue);
  clip-path: polygon(0 0, 100% 0, 0 100%);
  opacity: 0.9;
}

.page-faq .faq-section-head {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.2rem;
  padding-bottom: 0.9rem;
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-section-num {
  font-family: var(--font-numeric);
  font-size: 2.6rem;
  font-weight: 800;
  line-height: 0.9;
  letter-spacing: -0.05em;
  color: transparent;
  -webkit-text-stroke: 1px var(--primary-blue);
  flex-shrink: 0;
}

.page-faq .faq-section-tag {
  margin: 0 0 0.3rem;
  font-family: var(--font-numeric);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--faq-live);
}

.page-faq .faq-section-title {
  margin: 0;
  font-family: var(--font-primary);
  font-size: 1.3rem;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--text-silver);
}

/* ---------- 折叠卡片 ---------- */
.page-faq .faq-card {
  margin: 0 0 0.8rem;
  border: 1px solid var(--faq-line);
  background: var(--bg-card);
  transition: border-color 0.25s ease, background 0.25s ease;
}

.page-faq .faq-card[open] {
  border-color: var(--faq-line-strong);
  background:
    linear-gradient(135deg, rgba(0, 168, 255, 0.08), transparent 58%),
    var(--bg-card);
}

.page-faq .faq-card summary {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 1rem 1.1rem;
  cursor: pointer;
  font-family: var(--font-primary);
  font-size: 1.02rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--text-silver);
}

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

.page-faq .faq-card summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-numeric);
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1;
  color: var(--primary-blue);
  transition: transform 0.25s ease;
  flex-shrink: 0;
}

.page-faq .faq-card[open] summary::after {
  transform: rotate(45deg);
}

.page-faq .faq-q-mark {
  display: inline-grid;
  place-items: center;
  width: 1.75rem;
  height: 1.75rem;
  flex-shrink: 0;
  font-family: var(--font-numeric);
  font-size: 0.78rem;
  font-weight: 800;
  color: var(--faq-live);
  border: 1px solid rgba(57, 255, 20, 0.4);
  background: rgba(57, 255, 20, 0.06);
  transform: skewX(-8deg);
}

.page-faq .faq-answer {
  padding: 0.1rem 1.1rem 1.1rem 3.75rem;
  border-top: 1px dashed var(--faq-line);
}

.page-faq .faq-answer p {
  margin: 0.85rem 0 0;
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--faq-muted);
}

/* ---------- 右侧辅助栏 ---------- */
.page-faq .faq-search-status {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 1rem;
  border: 1px solid var(--faq-line);
  background: rgba(28, 31, 54, 0.6);
  font-size: 0.88rem;
  line-height: 1.5;
  color: var(--faq-muted);
}

.page-faq .faq-search-dot {
  width: 0.55rem;
  height: 0.55rem;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--faq-live);
  box-shadow: 0 0 0 3px rgba(57, 255, 20, 0.16);
  animation: faq-pulse 1.8s ease-in-out infinite;
}

@keyframes faq-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.55; transform: scale(0.82); }
}

.page-faq .faq-aside {
  display: grid;
  gap: 1.25rem;
  margin-top: 2.25rem;
}

.page-faq .faq-aside-card {
  padding: 1.15rem 1rem;
  border: 1px solid var(--faq-line-strong);
  background: var(--bg-card);
}

.page-faq .faq-aside-label {
  margin: 0 0 0.35rem;
  font-family: var(--font-numeric);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--faq-live);
}

.page-faq .faq-aside-title {
  margin: 0 0 1rem;
  font-family: var(--font-primary);
  font-size: 1.15rem;
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-silver);
}

.page-faq .img-frame {
  border: 1px solid var(--faq-line);
  background: var(--bg-deep);
}

.page-faq .img-frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq .faq-aside-desc {
  margin: 0.8rem 0 0;
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--faq-muted);
}

/* ---------- 联系卡片 ---------- */
.page-faq .faq-contact-list {
  list-style: none;
  margin: 0 0 1rem;
  padding: 0;
}

.page-faq .faq-contact-list li {
  display: grid;
  grid-template-columns: 4.6rem minmax(0, 1fr);
  gap: 0.6rem;
  padding: 0.58rem 0;
  border-bottom: 1px dashed var(--faq-line);
  font-family: var(--font-numeric);
  font-size: 0.85rem;
  color: var(--text-silver);
}

.page-faq .faq-contact-list li:last-child {
  border-bottom: 0;
}

.page-faq .faq-contact-list li span:first-child {
  font-family: var(--font-primary);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--link-blue);
}

.page-faq .faq-cv {
  text-align: right;
  overflow-wrap: anywhere;
}

.page-faq .faq-contact-card .btn {
  width: 100%;
  margin-top: 0.6rem;
  display: flex;
  justify-content: center;
}

/* ---------- 底部引导 ---------- */
.page-faq .faq-bottom {
  margin-top: 2.5rem;
  padding: 2rem 0;
  border-top: 1px solid var(--faq-line-strong);
  background:
    linear-gradient(90deg, rgba(0, 168, 255, 0.09), transparent 55%, rgba(255, 122, 0, 0.05)),
    var(--bg-deep);
}

.page-faq .faq-bottom-inner {
  display: flex;
  flex-direction: column;
  gap: 1.4rem;
  align-items: flex-start;
}

.page-faq .faq-bottom .faq-kicker {
  margin-bottom: 0.6rem;
}

.page-faq .faq-bottom-title {
  margin: 0 0 0.5rem;
  font-family: var(--font-primary);
  font-size: 1.5rem;
  font-weight: 800;
  line-height: 1.2;
  text-transform: uppercase;
  color: var(--text-silver);
}

.page-faq .faq-bottom p {
  margin: 0;
  color: var(--faq-muted);
  line-height: 1.7;
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 600px) {
  .page-faq .faq-filter-inner {
    flex-direction: row;
    align-items: center;
  }

  .page-faq .faq-filter-label {
    flex-shrink: 0;
  }

  .page-faq .faq-section {
    padding: 1.4rem 1.4rem 1rem;
  }

  .page-faq .faq-aside-card {
    padding: 1.3rem 1.25rem;
  }
}

/* ---------- 桌面端 ---------- */
@media (min-width: 992px) {
  .page-faq .faq-hero {
    padding: 3rem 0 3.5rem;
  }

  .page-faq .faq-hero-inner {
    grid-template-columns: 1fr auto;
    align-items: end;
  }

  .page-faq .faq-hero-title {
    max-width: 20em;
  }

  .page-faq .faq-hero-extra {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 0.5rem;
    padding-bottom: 0.4rem;
  }

  .page-faq .faq-hero-bignum {
    font-family: var(--font-numeric);
    font-size: 6.8rem;
    font-weight: 800;
    line-height: 0.8;
    letter-spacing: -0.04em;
    color: transparent;
    -webkit-text-stroke: 2px var(--primary-blue);
  }

  .page-faq .faq-hero-line {
    width: 8rem;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-blue), transparent);
    transform: skewX(-20deg);
  }

  .page-faq .faq-hero-meta {
    font-family: var(--font-numeric);
    font-size: 0.8rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--faq-muted);
  }

  .page-faq .faq-filterbar {
    padding: 1.2rem 0;
  }

  .page-faq .faq-layout {
    grid-template-columns: minmax(0, 1fr) 350px;
    gap: 2.4rem;
    align-items: start;
  }

  .page-faq .faq-sections {
    margin-top: 2.5rem;
  }

  .page-faq .faq-aside {
    position: sticky;
    top: calc(var(--header-h) + 1.25rem);
    margin-top: 2.5rem;
  }

  .page-faq .faq-bottom {
    margin-top: 3.5rem;
    padding: 2.5rem 0;
  }

  .page-faq .faq-bottom-inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}