/* ===== 页面 FAQ 专属样式 ===== */
.page-faq {
  --faq-gold: #F5C518;
  --faq-flame: #E63946;
  --faq-deep: #0B1F3A;
  --faq-dark: #0A0E18;
  --faq-light: #F0F0F0;
  --faq-card-bg: rgba(255, 255, 255, 0.05);
  --faq-transition: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --faq-radius: 8px;
  --faq-gap: 1.25rem;
  display: block;
  background-color: var(--faq-dark);
  color: var(--faq-light);
  padding: 2rem 0 4rem;
  min-height: 80vh;
}

.page-faq .container {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* ===== 标题区 ===== */
.page-faq .faq-header {
  text-align: center;
  margin-bottom: 3rem;
  padding-bottom: 2rem;
  border-bottom: 2px solid var(--faq-card-bg);
}

.page-faq .faq-header__title {
  font-family: var(--font-heading, 'Inter', sans-serif);
  font-weight: 800;
  font-size: clamp(2.2rem, 6vw, 3.6rem);
  color: var(--faq-gold);
  text-transform: uppercase;
  letter-spacing: 0.02em;
  margin: 0 0 0.5rem;
  line-height: 1.1;
}

.page-faq .faq-header__subtitle {
  font-family: var(--font-body, 'Open Sans', sans-serif);
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  color: rgba(240, 240, 240, 0.75);
  margin: 0 0 1.5rem;
  font-weight: 400;
}

/* ===== 搜索框 ===== */
.page-faq .faq-search {
  position: relative;
  max-width: 480px;
  margin: 0 auto;
}

.page-faq .faq-search__icon {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--faq-gold);
  opacity: 0.7;
  pointer-events: none;
  display: flex;
  align-items: center;
  justify-content: center;
}

.page-faq .faq-search__input {
  display: block;
  width: 100%;
  padding: 0.85rem 1rem 0.85rem 3rem;
  font-family: var(--font-body, 'Open Sans', sans-serif);
  font-size: 1rem;
  color: var(--faq-light);
  background-color: var(--faq-card-bg);
  border: 2px solid rgba(245, 197, 24, 0.25);
  border-radius: 50px;
  outline: none;
  transition: border-color var(--faq-transition), box-shadow var(--faq-transition);
  box-sizing: border-box;
}

.page-faq .faq-search__input::placeholder {
  color: rgba(240, 240, 240, 0.4);
}

.page-faq .faq-search__input:focus {
  border-color: var(--faq-gold);
  box-shadow: 0 0 0 3px rgba(245, 197, 24, 0.15);
}

/* ===== 分类区块 ===== */
.page-faq .faq-category {
  margin-bottom: 2.5rem;
  background: linear-gradient(135deg, rgba(11, 31, 58, 0.85) 0%, rgba(10, 14, 24, 0.95) 100%);
  border-radius: var(--faq-radius);
  padding: 1.5rem 1.25rem;
  border-left: 4px solid var(--faq-gold);
  transition: border-color var(--faq-transition);
}

.page-faq .faq-category:hover {
  border-left-color: var(--faq-flame);
}

.page-faq .faq-category__header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid rgba(245, 197, 24, 0.15);
}

.page-faq .faq-category__icon {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
  background-color: rgba(245, 197, 24, 0.1);
  padding: 4px;
  box-sizing: border-box;
}

.page-faq .faq-category__title {
  font-family: var(--font-heading, 'Inter', sans-serif);
  font-weight: 800;
  font-size: clamp(1.3rem, 3.5vw, 1.8rem);
  color: var(--faq-light);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin: 0;
}

/* ===== 手风琴卡片 ===== */
.page-faq .faq-category__items {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.page-faq .faq-item {
  background-color: var(--faq-card-bg);
  border-radius: 6px;
  overflow: hidden;
  transition: background-color var(--faq-transition);
}

.page-faq .faq-item:hover {
  background-color: rgba(255, 255, 255, 0.08);
}

.page-faq .faq-item__question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 1rem 1.25rem;
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font-body, 'Open Sans', sans-serif);
  font-size: 1rem;
  font-weight: 600;
  color: var(--faq-gold);
  text-align: left;
  gap: 0.75rem;
  transition: color var(--faq-transition);
  -webkit-tap-highlight-color: transparent;
}

.page-faq .faq-item__question:focus-visible {
  outline: 2px solid var(--faq-gold);
  outline-offset: -2px;
  border-radius: 6px;
}

.page-faq .faq-item__q-text {
  flex: 1;
  line-height: 1.4;
}

.page-faq .faq-item__arrow {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  color: var(--faq-flame);
  transition: transform var(--faq-transition);
}

.page-faq .faq-item__question[aria-expanded="true"] .faq-item__arrow {
  transform: rotate(90deg);
}

.page-faq .faq-item__answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.45s cubic-bezier(0.25, 0.46, 0.45, 0.94),
              padding 0.35s ease, opacity 0.35s ease;
  opacity: 0;
  padding: 0 1.25rem;
}

.page-faq .faq-item__answer[role="region"]:not([hidden]) {
  max-height: 600px;
  opacity: 1;
  padding: 0 1.25rem 1.25rem;
}

.page-faq .faq-item__answer p {
  margin: 0;
  font-family: var(--font-body, 'Open Sans', sans-serif);
  font-size: 0.95rem;
  line-height: 1.7;
  color: rgba(240, 240, 240, 0.85);
}

.page-faq .faq-item__answer a {
  color: var(--faq-gold);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--faq-transition);
}

.page-faq .faq-item__answer a:hover {
  color: var(--faq-flame);
}

.page-faq .faq-item__diagram {
  display: block;
  width: 100%;
  max-width: 400px;
  height: auto;
  margin-top: 1rem;
  border-radius: 6px;
  border: 1px solid rgba(245, 197, 24, 0.2);
  object-fit: cover;
}

/* ===== 未找到答案 ===== */
.page-faq .faq-no-answer {
  text-align: center;
  margin-top: 3rem;
  padding: 2rem;
  background: var(--faq-card-bg);
  border-radius: var(--faq-radius);
  border: 1px dashed rgba(245, 197, 24, 0.25);
}

.page-faq .faq-no-answer__text {
  font-family: var(--font-body, 'Open Sans', sans-serif);
  font-size: 1.1rem;
  color: rgba(240, 240, 240, 0.7);
  margin: 0 0 1rem;
}

.page-faq .btn--primary {
  display: inline-block;
  padding: 0.75rem 2rem;
  font-family: var(--font-heading, 'Inter', sans-serif);
  font-weight: 700;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--faq-light);
  background-color: var(--faq-flame);
  border: none;
  border-radius: 50px;
  cursor: pointer;
  text-decoration: none;
  transition: background-color var(--faq-transition), transform 0.2s ease;
}

.page-faq .btn--primary:hover {
  background-color: #c92e3a;
  transform: translateY(-2px);
}

.page-faq .btn--primary:focus-visible {
  outline: 2px solid var(--faq-gold);
  outline-offset: 3px;
}

/* ===== 搜索过滤 ===== */
.page-faq .faq-category[data-hidden] {
  display: none;
}

/* ===== 移动端优先 + 响应式 ===== */
@media (max-width: 480px) {
  .page-faq {
    padding: 1.5rem 0 3rem;
  }

  .page-faq .faq-header {
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
  }

  .page-faq .faq-header__title {
    font-size: clamp(1.6rem, 8vw, 2.2rem);
  }

  .page-faq .faq-header__subtitle {
    font-size: 0.95rem;
  }

  .page-faq .faq-search__input {
    padding: 0.7rem 1rem 0.7rem 2.6rem;
    font-size: 0.9rem;
  }

  .page-faq .faq-category {
    padding: 1rem 0.85rem;
    margin-bottom: 1.5rem;
    border-left-width: 3px;
  }

  .page-faq .faq-category__header {
    gap: 0.75rem;
  }

  .page-faq .faq-category__icon {
    width: 44px;
    height: 44px;
  }

  .page-faq .faq-category__title {
    font-size: clamp(1.1rem, 5vw, 1.4rem);
  }

  .page-faq .faq-item__question {
    padding: 0.85rem 1rem;
    font-size: 0.9rem;
  }

  .page-faq .faq-item__answer[role="region"]:not([hidden]) {
    padding: 0 1rem 1rem;
  }

  .page-faq .faq-item__answer p {
    font-size: 0.88rem;
  }

  .page-faq .faq-item__diagram {
    max-width: 100%;
  }

  .page-faq .faq-no-answer {
    margin-top: 2rem;
    padding: 1.5rem 1rem;
  }

  .page-faq .btn--primary {
    padding: 0.65rem 1.6rem;
    font-size: 0.9rem;
  }
}

@media (min-width: 481px) and (max-width: 768px) {
  .page-faq .container {
    padding: 0 1.5rem;
  }

  .page-faq .faq-category {
    padding: 1.25rem 1rem;
  }

  .page-faq .faq-category__icon {
    width: 52px;
    height: 52px;
  }

  .page-faq .faq-item__question {
    font-size: 0.95rem;
  }
}

@media (min-width: 769px) {
  .page-faq .container {
    padding: 0 2rem;
  }

  .page-faq .faq-category {
    padding: 1.75rem 1.75rem;
  }

  .page-faq .faq-item__question {
    font-size: 1.05rem;
  }

  .page-faq .faq-item__answer p {
    font-size: 1rem;
  }

  .page-faq .faq-item__diagram {
    max-width: 360px;
  }
}

/* ===== 动画与过渡增强 ===== */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__answer {
    transition: none;
  }

  .page-faq .faq-item__arrow {
    transition: none;
  }

  .page-faq .faq-item__question {
    transition: none;
  }

  .page-faq .btn--primary {
    transition: none;
  }
}