/* ===== 页面专属样式：FAQ ===== */
.page-faq {
  --faq-bg-card: rgba(26, 26, 26, 0.85);
  --faq-border-color: rgba(192, 192, 192, 0.2);
  --faq-gap-y: 28px;
  --faq-radius: 12px;
  --faq-padding: 20px;
  --faq-transition: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);

  display: block;
  width: 100%;
  background-color: var(--bg-dark, #121212);
  color: var(--text-primary, #FFFFFF);
  padding: 40px 0 60px;
  font-family: var(--font-body, 'Segoe UI', Roboto, sans-serif);
  line-height: 1.6;
}

/* ---- 面包屑 ---- */
.page-faq .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 10px;
  font-size: 0.85rem;
  color: var(--text-secondary, #B0B0B0);
  margin-bottom: 24px;
  letter-spacing: 0.3px;
}
.page-faq .breadcrumb a {
  color: var(--accent-silver, #C0C0C0);
  text-decoration: none;
  transition: color 0.2s;
  position: relative;
}
.page-faq .breadcrumb a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 2px;
  background: var(--primary-red, #E53935);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s;
}
.page-faq .breadcrumb a:hover::after {
  transform: scaleX(1);
}
.page-faq .breadcrumb a:hover {
  color: var(--text-primary, #FFFFFF);
}
.page-faq .breadcrumb [aria-current="page"] {
  color: var(--primary-red, #E53935);
  font-weight: 600;
}

/* ---- 英雄区 ---- */
.page-faq__hero {
  position: relative;
  margin-bottom: 40px;
  padding-bottom: 20px;
  border-bottom: 3px solid var(--primary-red, #E53935);
}
.page-faq__title {
  font-family: var(--font-heading, 'Arial Black', Impact, sans-serif);
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 3px;
  font-size: clamp(2.4rem, 7vw, 4.2rem);
  margin: 0 0 12px;
  color: var(--text-primary, #FFFFFF);
  line-height: 1.1;
  position: relative;
  display: inline-block;
}
.page-faq__title::before {
  content: '?';
  position: absolute;
  right: calc(100% + 16px);
  top: -12px;
  font-size: 3.6rem;
  color: var(--primary-red, #E53935);
  opacity: 0.3;
  font-family: var(--font-heading, 'Arial Black', Impact, sans-serif);
  pointer-events: none;
}
.page-faq__subtitle {
  font-size: clamp(0.95rem, 1.8vw, 1.15rem);
  color: var(--text-secondary, #B0B0B0);
  max-width: 680px;
  margin: 0 0 18px;
  line-height: 1.7;
}
.page-faq__hero-deco {
  position: absolute;
  right: 0;
  top: 0;
  width: 120px;
  height: 100%;
  background: repeating-linear-gradient(
    -45deg,
    transparent,
    transparent 8px,
    rgba(229, 57, 53, 0.08) 8px,
    rgba(229, 57, 53, 0.08) 16px
  );
  pointer-events: none;
  border-radius: 4px;
}

/* ---- 快速索引 ---- */
.page-faq__index {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 48px;
  padding: 16px 0;
  border-top: 1px solid var(--faq-border-color);
  border-bottom: 1px solid var(--faq-border-color);
}
.page-faq__index-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  background: var(--faq-bg-card);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  border: 1px solid var(--faq-border-color);
  border-radius: 50px;
  text-decoration: none;
  color: var(--text-primary, #FFFFFF);
  font-family: var(--font-label, 'Courier New', monospace);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  transition: all 0.3s;
}
.page-faq__index-item:hover {
  border-color: var(--primary-red, #E53935);
  background: rgba(229, 57, 53, 0.12);
  transform: translateY(-2px);
}
.page-faq__index-num {
  color: var(--primary-red, #E53935);
  font-size: 0.75rem;
}
.page-faq__index-label {
  text-transform: uppercase;
}

/* ---- 板块通用 ---- */
.page-faq__section {
  margin-bottom: var(--faq-gap-y, 28px);
  padding: var(--faq-padding);
  background: var(--faq-bg-card);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--faq-border-color);
  border-radius: var(--faq-radius);
  transition: border-color 0.3s;
}
.page-faq__section:hover {
  border-color: rgba(229, 57, 53, 0.3);
}
.page-faq__section-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 12px;
}
.page-faq__section-icon {
  width: 48px;
  height: 48px;
  object-fit: contain;
  flex-shrink: 0;
  border-radius: 8px;
  background: var(--emphasis-red-bg, rgba(229,57,53,0.15));
  padding: 6px;
}
.page-faq__section-title {
  font-family: var(--font-heading, 'Arial Black', Impact, sans-serif);
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  font-size: clamp(1.3rem, 3vw, 1.8rem);
  margin: 0;
  color: var(--text-primary, #FFFFFF);
  position: relative;
  display: inline-block;
}
.page-faq__section-title::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 60%;
  height: 3px;
  background: var(--primary-red, #E53935);
  border-radius: 2px;
}
.page-faq__section-desc {
  color: var(--text-secondary, #B0B0B0);
  font-size: 0.92rem;
  margin: 8px 0 24px;
  padding-left: 62px;
}

/* ---- 手风琴列表 ---- */
.page-faq__list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

/* ---- 单个问题项 (details) ---- */
.page-faq__item {
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid rgba(192, 192, 192, 0.1);
  border-radius: 10px;
  overflow: hidden;
  transition: border-color 0.3s, box-shadow 0.3s;
}
.page-faq__item[open] {
  border-color: rgba(229, 57, 53, 0.4);
  box-shadow: 0 4px 20px rgba(229, 57, 53, 0.06);
}

/* ---- 问题标题 ---- */
.page-faq__question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 20px;
  font-family: var(--font-body, 'Segoe UI', Roboto, sans-serif);
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.4;
  color: var(--text-primary, #FFFFFF);
  cursor: pointer;
  list-style: none;
  user-select: none;
  transition: background 0.25s, color 0.25s;
  position: relative;
}
.page-faq__question::-webkit-details-marker {
  display: none;
}
.page-faq__question::marker {
  display: none;
  content: '';
}
.page-faq__question::after {
  content: '+';
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  font-size: 1.3rem;
  font-weight: 400;
  color: var(--primary-red, #E53935);
  border: 2px solid var(--primary-red, #E53935);
  border-radius: 50%;
  transition: transform 0.35s, background 0.3s, color 0.3s;
  line-height: 1;
}
.page-faq__question:hover {
  background: rgba(229, 57, 53, 0.06);
}
.page-faq__question:hover::after {
  background: var(--primary-red, #E53935);
  color: #fff;
}
.page-faq__item[open] > .page-faq__question::after {
  transform: rotate(45deg);
  background: var(--primary-red, #E53935);
  color: #fff;
}

/* ---- 答案区域 ---- */
.page-faq__answer {
  padding: 0 20px 18px;
  color: var(--text-secondary, #B0B0B0);
  font-size: 0.95rem;
  line-height: 1.7;
  animation: faq-fade-in 0.35s ease-out;
}
.page-faq__answer p {
  margin: 0 0 8px;
}
.page-faq__answer p:last-child {
  margin-bottom: 0;
}
@keyframes faq-fade-in {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---- 联系详情列表 ---- */
.page-faq__contact-detail {
  list-style: none;
  padding: 0;
  margin: 12px 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.page-faq__contact-detail li {
  padding: 4px 0;
  border-bottom: 1px solid rgba(192, 192, 192, 0.08);
}
.page-faq__contact-detail li strong {
  color: var(--text-primary, #FFFFFF);
  font-weight: 600;
  min-width: 56px;
  display: inline-block;
}

/* ---- 联系卡片 ---- */
.page-faq__contact-card {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin-top: 24px;
  padding: 18px;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(192, 192, 192, 0.12);
  border-radius: 12px;
  align-items: center;
}
.page-faq__contact-img {
  width: 100%;
  max-width: 340px;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  border-radius: 8px;
  background: var(--emphasis-red-bg, rgba(229,57,53,0.15));
  flex-shrink: 0;
}
.page-faq__contact-info {
  flex: 1;
  min-width: 200px;
}
.page-faq__contact-heading {
  font-family: var(--font-heading, 'Arial Black', Impact, sans-serif);
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-size: 1.1rem;
  margin: 0 0 10px;
  color: var(--primary-red, #E53935);
}
.page-faq__contact-info p {
  margin: 4px 0;
  font-size: 0.92rem;
  color: var(--text-secondary, #B0B0B0);
}
.page-faq__contact-info p strong {
  color: var(--text-primary, #FFFFFF);
  font-weight: 600;
}
.page-faq__contact-note {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid rgba(192, 192, 192, 0.1);
  font-style: italic;
  font-size: 0.88rem;
  color: var(--accent-silver, #C0C0C0);
}

/* ---- 信任声明 ---- */
.page-faq__trust {
  margin-top: 40px;
  padding: 16px 20px;
  border-left: 4px solid var(--primary-red, #E53935);
  background: rgba(229, 57, 53, 0.06);
  border-radius: 4px;
}
.page-faq__trust .trust-statement {
  margin: 0;
  font-size: 0.92rem;
  color: var(--text-secondary, #B0B0B0);
  line-height: 1.6;
}

/* ===== 响应式 ===== */
@media (max-width: 599px) {
  .page-faq {
    padding: 24px 0 40px;
  }
  .page-faq .container {
    padding-left: 16px;
    padding-right: 16px;
  }
  .page-faq__title::before {
    display: none;
  }
  .page-faq__section {
    padding: 16px;
  }
  .page-faq__section-desc {
    padding-left: 0;
  }
  .page-faq__question {
    padding: 14px 16px;
    font-size: 0.92rem;
  }
  .page-faq__answer {
    padding: 0 16px 16px;
    font-size: 0.88rem;
  }
  .page-faq__contact-card {
    flex-direction: column;
    padding: 14px;
  }
  .page-faq__contact-img {
    max-width: 100%;
  }
  .page-faq__index-item {
    font-size: 0.78rem;
    padding: 8px 14px;
  }
  .page-faq__hero-deco {
    width: 60px;
  }
  .page-faq__section-icon {
    width: 40px;
    height: 40px;
  }
}

@media (min-width: 600px) and (max-width: 1023px) {
  .page-faq {
    padding: 32px 0 50px;
  }
  .page-faq .container {
    padding-left: 28px;
    padding-right: 28px;
  }
  .page-faq__section {
    padding: 18px 22px;
  }
  .page-faq__contact-img {
    max-width: 280px;
  }
  .page-faq__section-icon {
    width: 44px;
    height: 44px;
  }
}

@media (min-width: 1024px) {
  .page-faq {
    padding: 48px 0 72px;
  }
  .page-faq .container {
    padding-left: 40px;
    padding-right: 40px;
  }
  .page-faq__hero {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
  }
  .page-faq__subtitle {
    max-width: 720px;
  }
  .page-faq__index {
    gap: 16px;
  }
  .page-faq__section {
    padding: 24px 28px;
    margin-bottom: 32px;
  }
  .page-faq__question {
    padding: 18px 24px;
    font-size: 1.05rem;
  }
  .page-faq__answer {
    padding: 0 24px 20px;
  }
  .page-faq__contact-card {
    flex-wrap: nowrap;
    padding: 20px 24px;
  }
  .page-faq__section-icon {
    width: 52px;
    height: 52px;
  }
  .page-faq__trust {
    margin-top: 48px;
    padding: 18px 24px;
  }
}