/* =============================================
   Page: FAQ – 帮助中心
   作用域：.page-faq
   移动端优先 + 桌面媒体查询(≥768px / ≥1024px)
   ============================================= */
.page-faq {
  display: block;
  width: 100%;
  padding: var(--gap-lg) 0 var(--gap-xl);
  background-color: var(--color-primary, #0B3D91);
  color: var(--color-white, #FFFFFF);
  font-family: var(--font-body, 'Inter', system-ui, sans-serif);
}

/* ---- 容器 ---- */
.page-faq .container {
  max-width: var(--content-max, 1200px);
  margin: 0 auto;
  padding: 0 var(--gap-sm, 16px);
}

/* ---- 面包屑 ---- */
.page-faq .breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--gap-xs, 8px);
  font-size: 0.875rem;
  color: var(--color-muted, #E0E6ED);
  margin-bottom: var(--gap-md, 24px);
  opacity: 0.8;
}
.page-faq .breadcrumb__link {
  color: var(--color-accent, #FF6B35);
  text-decoration: none;
  transition: color var(--transition, 0.25s ease);
}
.page-faq .breadcrumb__link:hover,
.page-faq .breadcrumb__link:focus-visible {
  color: var(--color-neon, #39FF14);
  outline: 2px solid var(--color-neon, #39FF14);
  outline-offset: 2px;
}
.page-faq .breadcrumb__sep {
  user-select: none;
  color: var(--color-muted, #E0E6ED);
}
.page-faq .breadcrumb__current {
  font-weight: 600;
  color: var(--color-white, #FFFFFF);
}

/* ---- 页面标题区 ---- */
.page-faq .faq-header {
  margin-bottom: var(--gap-xl, 80px);
  padding-bottom: var(--gap-lg, 48px);
  border-bottom: 1px solid rgba(224, 230, 237, 0.15);
}
.page-faq .faq-header__title {
  font-family: var(--font-heading, 'Poppins', system-ui, sans-serif);
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1.15;
  margin: 0 0 var(--gap-sm, 16px);
  letter-spacing: -0.02em;
  color: var(--color-white, #FFFFFF);
}
.page-faq .faq-header__desc {
  font-size: 1.125rem;
  line-height: 1.6;
  color: rgba(224, 230, 237, 0.85);
  max-width: 640px;
  margin: 0 0 var(--gap-md, 24px);
}
.page-faq .faq-search {
  position: relative;
  max-width: 480px;
}
.page-faq .faq-search__input {
  width: 100%;
  padding: 0.75rem 1rem 0.75rem 2.75rem;
  font-family: var(--font-body, 'Inter', system-ui, sans-serif);
  font-size: 1rem;
  line-height: 1.5;
  color: var(--color-white, #FFFFFF);
  background-color: rgba(26, 91, 191, 0.35);
  border: 1px solid rgba(224, 230, 237, 0.25);
  border-radius: var(--radius-sm, 4px);
  transition: border-color var(--transition, 0.25s ease), box-shadow var(--transition, 0.25s ease);
  box-sizing: border-box;
  -webkit-appearance: none;
  appearance: none;
}
.page-faq .faq-search__input::placeholder {
  color: rgba(224, 230, 237, 0.5);
  opacity: 1;
}
.page-faq .faq-search__input:focus {
  outline: none;
  border-color: var(--color-accent, #FF6B35);
  box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.25);
}
.page-faq .faq-search__input:focus-visible {
  outline: 2px solid var(--color-neon, #39FF14);
  outline-offset: 2px;
}
.page-faq .faq-search__icon {
  position: absolute;
  left: 0.875rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.25rem;
  color: var(--color-muted, #E0E6ED);
  pointer-events: none;
  line-height: 1;
}

/* ---- 问答区整体 ---- */
.page-faq .faq-sections {
  display: flex;
  flex-direction: column;
  gap: var(--gap-xl, 80px);
}

/* ---- 每个 section ---- */
.page-faq .faq-section {
  scroll-margin-top: 100px;
}
.page-faq .faq-section__title {
  font-family: var(--font-heading, 'Poppins', system-ui, sans-serif);
  font-size: 1.75rem;
  font-weight: 800;
  line-height: 1.2;
  margin: 0 0 var(--gap-md, 24px);
  color: var(--color-white, #FFFFFF);
  letter-spacing: -0.01em;
  padding-left: var(--gap-sm, 16px);
  border-left: 4px solid var(--color-accent, #FF6B35);
}
.page-faq .faq-section__items {
  display: flex;
  flex-direction: column;
  gap: var(--gap-xs, 8px);
}

/* ---- 单个问答项 (details) ---- */
.page-faq .faq-item {
  background-color: rgba(26, 91, 191, 0.2);
  border: 1px solid rgba(224, 230, 237, 0.12);
  border-radius: var(--radius-sm, 4px);
  overflow: hidden;
  transition: border-color var(--transition, 0.25s ease), box-shadow var(--transition, 0.25s ease);
}
.page-faq .faq-item:hover {
  border-color: rgba(255, 107, 53, 0.4);
}
.page-faq .faq-item[open] {
  border-color: rgba(255, 107, 53, 0.5);
  box-shadow: 0 4px 20px rgba(10, 31, 61, 0.4);
}

/* ---- 问题 (summary) ---- */
.page-faq .faq-item__question {
  display: flex;
  align-items: center;
  gap: var(--gap-sm, 16px);
  padding: 1rem 1.25rem;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-heading, 'Poppins', system-ui, sans-serif);
  font-weight: 600;
  font-size: 1.05rem;
  line-height: 1.4;
  color: var(--color-white, #FFFFFF);
  transition: background-color var(--transition, 0.25s ease);
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}
.page-faq .faq-item__question::-webkit-details-marker {
  display: none;
}
.page-faq .faq-item__question::marker {
  display: none;
  content: "";
}
.page-faq .faq-item__question:hover {
  background-color: rgba(26, 91, 191, 0.25);
}
.page-faq .faq-item__question:focus-visible {
  outline: 2px solid var(--color-neon, #39FF14);
  outline-offset: -2px;
  background-color: rgba(26, 91, 191, 0.3);
}

/* 左侧问号标记 */
.page-faq .faq-item__q-marker {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background-color: var(--color-accent, #FF6B35);
  color: var(--color-white, #FFFFFF);
  font-family: var(--font-data, 'Playfair Display', Georgia, serif);
  font-size: 1rem;
  font-weight: 700;
  line-height: 1;
  transition: background-color var(--transition, 0.25s ease), transform var(--transition, 0.25s ease);
}
.page-faq .faq-item__question:hover .faq-item__q-marker {
  background-color: var(--color-neon, #39FF14);
  color: var(--color-dark, #0A1F3D);
  transform: scale(1.05);
}

/* 问题文字 */
.page-faq .faq-item__q-text {
  flex: 1;
  min-width: 0;
}

/* 右侧箭头 */
.page-faq .faq-item__q-arrow {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  transition: transform var(--transition, 0.35s ease);
}
.page-faq .faq-item__q-arrow::before {
  content: "";
  display: block;
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--color-muted, #E0E6ED);
  border-bottom: 2px solid var(--color-muted, #E0E6ED);
  transform: rotate(-45deg) translateY(-2px);
  transition: border-color var(--transition, 0.25s ease);
}
.page-faq .faq-item__question:hover .faq-item__q-arrow::before {
  border-color: var(--color-accent, #FF6B35);
}
.page-faq .faq-item[open] .faq-item__q-arrow {
  transform: rotate(180deg);
}

/* ---- 答案区 ---- */
.page-faq .faq-item__answer {
  padding: 0 1.25rem 1.25rem calc(1.25rem + 28px + var(--gap-sm, 16px));
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--color-muted, #E0E6ED);
  background-color: rgba(10, 31, 61, 0.3);
  border-top: 1px solid rgba(224, 230, 237, 0.06);
}
.page-faq .faq-item__answer p {
  margin: 0 0 0.75rem;
}
.page-faq .faq-item__answer p:last-child {
  margin-bottom: 0;
}

/* 答案中的链接 */
.page-faq .faq-link {
  color: var(--color-accent, #FF6B35);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--transition, 0.25s ease);
}
.page-faq .faq-link:hover,
.page-faq .faq-link:focus-visible {
  color: var(--color-neon, #39FF14);
  outline: 2px solid var(--color-neon, #39FF14);
  outline-offset: 2px;
}

/* 答案内的图片 */
.page-faq .faq-item__img-wrap {
  margin-top: var(--gap-sm, 16px);
  border-radius: var(--radius-sm, 4px);
  overflow: hidden;
  background-color: rgba(10, 31, 61, 0.5);
}
.page-faq .faq-item__img {
  display: block;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-sm, 4px);
}

/* ---- 客服联系区 ---- */
.page-faq .faq-contact {
  scroll-margin-top: 100px;
  background-color: var(--color-dark, #0A1F3D);
  border-radius: var(--radius-md, 8px);
  border: 1px solid rgba(255, 107, 53, 0.2);
  overflow: hidden;
  margin-top: var(--gap-lg, 48px);
}
.page-faq .faq-contact__inner {
  padding: var(--gap-lg, 48px) var(--gap-md, 24px);
}
.page-faq .faq-contact__info {
  max-width: 640px;
  margin: 0 auto;
  text-align: center;
}
.page-faq .faq-contact__title {
  font-family: var(--font-heading, 'Poppins', system-ui, sans-serif);
  font-size: 1.75rem;
  font-weight: 800;
  line-height: 1.2;
  margin: 0 0 var(--gap-sm, 16px);
  color: var(--color-white, #FFFFFF);
}
.page-faq .faq-contact__desc {
  font-size: 1rem;
  line-height: 1.6;
  color: rgba(224, 230, 237, 0.8);
  margin: 0 0 var(--gap-md, 24px);
}

/* 联系方式弹出 (details) */
.page-faq .faq-contact__popup {
  display: inline-block;
  text-align: left;
  width: 100%;
  max-width: 480px;
  margin: 0 auto;
  border-radius: var(--radius-sm, 4px);
  overflow: hidden;
}
.page-faq .faq-contact__popup[open] {
  background-color: rgba(26, 91, 191, 0.15);
  border: 1px solid rgba(255, 107, 53, 0.3);
}

/* 按钮样式 (summary) */
.page-faq .faq-contact__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--gap-xs, 8px);
  width: 100%;
  padding: 0.875rem 1.5rem;
  font-family: var(--font-heading, 'Poppins', system-ui, sans-serif);
  font-size: 1.125rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--color-white, #FFFFFF);
  background-color: var(--color-accent, #FF6B35);
  border: none;
  border-radius: var(--radius-sm, 4px);
  cursor: pointer;
  list-style: none;
  transition: background-color var(--transition, 0.25s ease), box-shadow var(--transition, 0.25s ease);
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}
.page-faq .faq-contact__btn::-webkit-details-marker {
  display: none;
}
.page-faq .faq-contact__btn::marker {
  display: none;
  content: "";
}
.page-faq .faq-contact__btn:hover {
  background-color: #e55a2b;
  box-shadow: 0 4px 16px rgba(255, 107, 53, 0.35);
}
.page-faq .faq-contact__btn:focus-visible {
  outline: 2px solid var(--color-neon, #39FF14);
  outline-offset: 2px;
  background-color: #e55a2b;
}
.page-faq .faq-contact__btn-text {
  flex: 0 1 auto;
}
.page-faq .faq-contact__btn-arrow {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  transition: transform var(--transition, 0.35s ease);
}
.page-faq .faq-contact__btn-arrow::before {
  content: "";
  display: block;
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--color-white, #FFFFFF);
  border-bottom: 2px solid var(--color-white, #FFFFFF);
  transform: rotate(45deg) translateY(-3px);
}
.page-faq .faq-contact__popup[open] .faq-contact__btn-arrow {
  transform: rotate(180deg);
}

/* 联系方式详细内容 */
.page-faq .faq-contact__details {
  padding: var(--gap-md, 24px);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--gap-md, 24px);
}
.page-faq .faq-contact__avatar {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  overflow: hidden;
  border: 2px solid var(--color-accent, #FF6B35);
  flex-shrink: 0;
  background-color: var(--color-secondary, #1A5BBF);
}
.page-faq .faq-contact__img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
}
.page-faq .faq-contact__list {
  list-style: none;
  margin: 0;
  padding: 0;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: var(--gap-sm, 16px);
}
.page-faq .faq-contact__item {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding-bottom: var(--gap-xs, 8px);
  border-bottom: 1px solid rgba(224, 230, 237, 0.1);
}
.page-faq .faq-contact__item:last-child {
  border-bottom: none;
}
.page-faq .faq-contact__label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-gold, #FFD700);
}
.page-faq .faq-contact__value {
  font-size: 1rem;
  line-height: 1.5;
  color: var(--color-white, #FFFFFF);
  word-break: break-word;
}
.page-faq .faq-contact__value a {
  color: var(--color-accent, #FF6B35);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--transition, 0.25s ease);
}
.page-faq .faq-contact__value a:hover,
.page-faq .faq-contact__value a:focus-visible {
  color: var(--color-neon, #39FF14);
  outline: 2px solid var(--color-neon, #39FF14);
  outline-offset: 2px;
}
.page-faq .faq-contact__note {
  font-size: 0.85rem;
  line-height: 1.5;
  color: rgba(224, 230, 237, 0.6);
  text-align: center;
  margin: 0;
}

/* =============================================
   桌面适配 (≥768px)
   ============================================= */
@media (min-width: 768px) {
  .page-faq .container {
    padding: 0 var(--gap-lg, 48px);
  }
  .page-faq .faq-header__title {
    font-size: 3rem;
  }
  .page-faq .faq-header__desc {
    font-size: 1.25rem;
  }
  .page-faq .faq-search {
    max-width: 560px;
  }
  .page-faq .faq-section__title {
    font-size: 2rem;
  }
  .page-faq .faq-item__question {
    font-size: 1.1rem;
    padding: 1.125rem 1.5rem;
  }
  .page-faq .faq-item__answer {
    padding: 0 1.5rem 1.5rem calc(1.5rem + 28px + var(--gap-sm, 16px));
    font-size: 1rem;
  }
  .page-faq .faq-contact__inner {
    padding: var(--gap-xl, 80px) var(--gap-lg, 48px);
  }
  .page-faq .faq-contact__title {
    font-size: 2rem;
  }
  .page-faq .faq-contact__avatar {
    width: 120px;
    height: 120px;
  }
  .page-faq .faq-contact__details {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
  }
  .page-faq .faq-contact__list {
    max-width: 400px;
  }
}

/* =============================================
   桌面适配 (≥1024px)
   ============================================= */
@media (min-width: 1024px) {
  .page-faq {
    padding: var(--gap-xl, 80px) 0 120px;
  }
  .page-faq .faq-header__title {
    font-size: 3.5rem;
  }
  .page-faq .faq-header__desc {
    font-size: 1.375rem;
    max-width: 720px;
  }
  .page-faq .faq-search {
    max-width: 600px;
  }
  .page-faq .faq-section__title {
    font-size: 2.25rem;
    padding-left: var(--gap-md, 24px);
  }
  .page-faq .faq-item__question {
    font-size: 1.15rem;
    padding: 1.25rem 1.75rem;
  }
  .page-faq .faq-item__answer {
    padding: 0 1.75rem 1.5rem calc(1.75rem + 28px + var(--gap-sm, 16px));
  }
  .page-faq .faq-contact__inner {
    padding: var(--gap-xl, 80px) var(--gap-xl, 80px);
  }
  .page-faq .faq-contact__details {
    gap: var(--gap-lg, 48px);
  }
  .page-faq .faq-contact__avatar {
    width: 140px;
    height: 140px;
  }
  .page-faq .faq-contact__list {
    max-width: 480px;
  }
}

/* =============================================
   辅助类
   ============================================= */
.page-faq .sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}