/* ===== FAQ 页面专属样式 ===== */
.page-faq {
  --faq-brand: #FF6B35;
  --faq-dark: #0D0D0D;
  --faq-dark-blue: #1A1A2E;
  --faq-light: #FFFFFF;
  --faq-green: #00FF87;
  --faq-gray: rgba(255, 255, 255, 0.55);
  --faq-card-bg: rgba(26, 26, 46, 0.85);
  --faq-shadow: 0 8px 32px rgba(255, 107, 53, 0.2);
  --faq-border: 2px solid rgba(255, 107, 53, 0.3);
  --faq-radius: 4px;
  --faq-transition: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);

  background: var(--faq-dark);
  color: var(--faq-light);
  font-family: 'Inter', sans-serif;
  line-height: 1.6;
  overflow-x: hidden;
}

/* ---- Hero 区 ---- */
.faq-hero {
  position: relative;
  width: 100%;
  height: 300px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.faq-hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.faq-hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.faq-hero-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(
    135deg,
    rgba(13, 13, 13, 0.88) 0%,
    rgba(13, 13, 13, 0.40) 50%,
    rgba(255, 107, 53, 0.15) 100%
  );
  pointer-events: none;
}

.faq-hero-content {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 1200px;
  padding: 0 24px;
  text-align: center;
}

.faq-breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 14px;
  color: var(--faq-gray);
  margin-bottom: 16px;
  font-family: 'Inter', sans-serif;
  letter-spacing: 0.02em;
}

.faq-breadcrumb a {
  color: var(--faq-gray);
  text-decoration: none;
  transition: color var(--faq-transition);
  position: relative;
}

.faq-breadcrumb a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 1px;
  background: var(--faq-brand);
  transition: width var(--faq-transition);
}

.faq-breadcrumb a:hover { color: var(--faq-brand); }
.faq-breadcrumb a:hover::after { width: 100%; }

.faq-breadcrumb-sep {
  font-size: 10px;
  color: var(--faq-brand);
  opacity: 0.7;
}

.faq-breadcrumb span[aria-current="page"] {
  color: var(--faq-light);
  font-weight: 500;
}

.faq-title {
  font-family: 'Montserrat', sans-serif;
  font-weight: 900;
  font-size: 48px;
  letter-spacing: -0.02em;
  margin: 0 0 12px 0;
  text-transform: uppercase;
  color: var(--faq-light);
  text-shadow: 0 2px 20px rgba(255, 107, 53, 0.3);
  position: relative;
  display: inline-block;
}

.faq-title::after {
  content: '';
  display: block;
  width: 80px;
  height: 4px;
  background: var(--faq-brand);
  margin: 12px auto 0;
  clip-path: polygon(0 0, 100% 0, 90% 100%, 0 100%);
}

.faq-subtitle {
  font-size: 18px;
  color: var(--faq-gray);
  max-width: 600px;
  margin: 16px auto 0;
  font-weight: 400;
  letter-spacing: 0.01em;
}

/* ---- 手风琴列表区 ---- */
.faq-listing {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}

.faq-listing-inner {
  display: flex;
  flex-direction: column;
  gap: 48px;
}

/* ---- 手风琴组 ---- */
.faq-group {
  background: transparent;
  padding: 0;
  position: relative;
}

.faq-group::before {
  content: '';
  position: absolute;
  top: -24px;
  left: 0;
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--faq-brand), transparent);
  clip-path: polygon(0 0, 100% 0, 80% 100%, 0 100%);
}

.faq-group-heading {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: 'Montserrat', sans-serif;
  font-weight: 900;
  font-size: 28px;
  letter-spacing: -0.01em;
  color: var(--faq-light);
  margin: 0 0 20px 0;
  padding-bottom: 12px;
  border-bottom: 2px solid rgba(255, 107, 53, 0.2);
  position: relative;
}

.faq-group-icon {
  font-size: 20px;
  color: var(--faq-brand);
  line-height: 1;
  transform: skewX(-10deg);
  display: inline-block;
}

.faq-group-deco {
  width: 40px;
  height: 40px;
  object-fit: contain;
  border-radius: 50%;
  box-shadow: 0 0 20px rgba(0, 255, 135, 0.25);
  flex-shrink: 0;
  transition: transform var(--faq-transition), box-shadow var(--faq-transition);
}

.faq-group-deco:hover {
  transform: scale(1.08);
  box-shadow: 0 0 32px rgba(0, 255, 135, 0.45);
}

/* ---- 手风琴项 ---- */
.faq-item {
  display: block;
  margin-bottom: 12px;
  background: var(--faq-card-bg);
  border: var(--faq-border);
  border-left: 4px solid var(--faq-brand);
  border-radius: var(--faq-radius);
  overflow: hidden;
  transition: border-color var(--faq-transition), box-shadow var(--faq-transition);
  backdrop-filter: blur(4px);
}

.faq-item[open] {
  border-color: var(--faq-brand);
  box-shadow: var(--faq-shadow);
}

.faq-item:hover {
  border-left-color: var(--faq-green);
}

.faq-question {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 18px 20px;
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  font-size: 17px;
  color: var(--faq-light);
  cursor: pointer;
  list-style: none;
  user-select: none;
  position: relative;
  transition: background var(--faq-transition);
}

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

.faq-question::marker {
  display: none;
  content: '';
}

.faq-question:hover {
  background: rgba(255, 107, 53, 0.06);
}

.faq-q-marker {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background: var(--faq-brand);
  color: var(--faq-dark);
  font-family: 'Montserrat', sans-serif;
  font-weight: 900;
  font-size: 13px;
  border-radius: 2px;
  flex-shrink: 0;
  transform: skewX(-6deg);
  line-height: 1;
}

.faq-arrow {
  margin-left: auto;
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  position: relative;
  transition: transform var(--faq-transition);
}

.faq-arrow::before,
.faq-arrow::after {
  content: '';
  position: absolute;
  background: var(--faq-brand);
  border-radius: 1px;
  transition: transform var(--faq-transition), background var(--faq-transition);
}

.faq-arrow::before {
  width: 2px;
  height: 14px;
  top: 3px;
  left: 9px;
}

.faq-arrow::after {
  width: 14px;
  height: 2px;
  top: 9px;
  left: 3px;
}

.faq-item[open] .faq-arrow {
  transform: rotate(45deg);
}

.faq-item[open] .faq-arrow::before,
.faq-item[open] .faq-arrow::after {
  background: var(--faq-green);
}

.faq-answer {
  padding: 0 20px 20px 60px;
  font-size: 16px;
  color: rgba(255, 255, 255, 0.85);
  line-height: 1.7;
  border-top: 1px solid rgba(255, 107, 53, 0.12);
}

.faq-answer p {
  margin: 16px 0 0;
}

.faq-answer a {
  color: var(--faq-brand);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--faq-transition), color var(--faq-transition);
  font-weight: 500;
}

.faq-answer a:hover {
  color: var(--faq-green);
  border-bottom-color: var(--faq-green);
}

.faq-highlight {
  color: var(--faq-green);
  font-weight: 500;
  letter-spacing: 0.01em;
}

/* ---- 组之间的装饰分隔（伪元素实现） ---- */
.faq-group + .faq-group {
  position: relative;
  padding-top: 12px;
}

.faq-group + .faq-group::after {
  content: '';
  position: absolute;
  top: -24px;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255, 107, 53, 0.25) 20%,
    rgba(0, 255, 135, 0.15) 50%,
    rgba(255, 107, 53, 0.25) 80%,
    transparent 100%
  );
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
  .faq-hero {
    height: 220px;
  }

  .faq-title {
    font-size: 32px;
  }

  .faq-title::after {
    width: 60px;
    height: 3px;
  }

  .faq-subtitle {
    font-size: 15px;
    padding: 0 12px;
  }

  .faq-breadcrumb {
    font-size: 12px;
    gap: 6px;
  }

  .faq-listing {
    padding: 32px 16px 60px;
  }

  .faq-listing-inner {
    gap: 36px;
  }

  .faq-group-heading {
    font-size: 22px;
    flex-wrap: wrap;
    gap: 8px;
  }

  .faq-group-deco {
    width: 32px;
    height: 32px;
  }

  .faq-question {
    font-size: 15px;
    padding: 14px 16px;
    gap: 10px;
  }

  .faq-answer {
    padding: 0 16px 16px 52px;
    font-size: 14px;
  }

  .faq-q-marker {
    width: 24px;
    height: 24px;
    font-size: 11px;
  }

  .faq-arrow {
    width: 16px;
    height: 16px;
  }

  .faq-arrow::before {
    width: 2px;
    height: 10px;
    top: 3px;
    left: 7px;
  }

  .faq-arrow::after {
    width: 10px;
    height: 2px;
    top: 7px;
    left: 3px;
  }

  .faq-group::before {
    top: -18px;
    width: 40px;
    height: 2px;
  }

  .faq-group + .faq-group::after {
    top: -18px;
  }
}

@media (max-width: 480px) {
  .faq-hero {
    height: 180px;
  }

  .faq-title {
    font-size: 26px;
  }

  .faq-subtitle {
    font-size: 14px;
  }

  .faq-listing {
    padding: 24px 12px 48px;
  }

  .faq-group-heading {
    font-size: 19px;
  }

  .faq-question {
    font-size: 14px;
    padding: 12px 14px;
  }

  .faq-answer {
    padding: 0 14px 14px 44px;
    font-size: 13px;
  }

  .faq-q-marker {
    width: 20px;
    height: 20px;
    font-size: 10px;
  }

  .faq-group-deco {
    width: 28px;
    height: 28px;
  }
}

/* ===== 打印优化 ===== */
@media print {
  .page-faq {
    background: #fff;
    color: #111;
  }

  .faq-hero {
    height: auto;
    padding: 20px 0;
  }

  .faq-hero-bg,
  .faq-hero-overlay {
    display: none;
  }

  .faq-item {
    break-inside: avoid;
    border-color: #ccc;
    background: #f9f9f9;
  }

  .faq-answer a {
    color: #004E7C;
  }
}