/* ===== page-faq: 帮助中心 专属样式 ===== */
.page-faq {
  --faq-gap: 24px;
  --faq-radius: 8px;
  --faq-border-color: var(--border-subtle);
  --faq-bg-item: var(--card-dark);
  --faq-text-question: var(--electric-blue);
  --faq-text-answer: var(--text-primary);
  --faq-indicator-size: 16px;
  --faq-search-height: 48px;
  --faq-category-icon-size: 48px;
  display: block;
  width: 100%;
  min-height: 100%;
  background: var(--bg-dark);
  color: var(--text-primary);
  font-family: 'Inter', 'Noto Sans SC', sans-serif;
  padding: 32px 16px 48px;
  box-sizing: border-box;
}

.page-faq .container {
  max-width: 860px;
  margin: 0 auto;
  width: 100%;
  box-sizing: border-box;
}

/* ===== 首屏 ===== */
.page-faq .faq-hero {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 28px;
  padding: 24px 0 16px;
  border-bottom: 1px solid var(--faq-border-color);
}

.page-faq .faq-hero-icon {
  width: 80px;
  height: 80px;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--surface-dark);
  object-fit: cover;
  border: 2px solid var(--neon-green);
  box-shadow: 0 0 20px var(--hover-glow);
}

.page-faq .faq-hero-text {
  flex: 1;
  min-width: 0;
}

.page-faq .faq-title {
  font-family: Montserrat, 'Noto Sans SC', sans-serif;
  font-weight: 900;
  font-size: 2rem;
  letter-spacing: 0.08em;
  color: var(--text-primary);
  margin: 0 0 4px;
  background: linear-gradient(135deg, var(--neon-green), var(--electric-blue));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.page-faq .faq-subtitle {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin: 0;
  letter-spacing: 0.02em;
}

/* ===== 搜索框 ===== */
.page-faq .faq-search-wrap {
  position: relative;
  margin-bottom: 32px;
  width: 100%;
}

.page-faq .faq-search-input {
  width: 100%;
  height: var(--faq-search-height);
  padding: 0 16px 0 48px;
  background: var(--surface-dark);
  border: 1px solid var(--faq-border-color);
  border-radius: var(--faq-radius);
  color: var(--text-primary);
  font-size: 1rem;
  font-family: inherit;
  outline: none;
  transition: border-color 0.25s, box-shadow 0.25s;
  box-sizing: border-box;
}

.page-faq .faq-search-input::placeholder {
  color: var(--text-secondary);
  opacity: 0.7;
}

.page-faq .faq-search-input:focus {
  border-color: var(--neon-green);
  box-shadow: 0 0 12px var(--hover-glow);
}

.page-faq .faq-search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  pointer-events: none;
}

/* ===== 分类区块 ===== */
.page-faq .faq-category {
  margin-bottom: 36px;
  background: var(--surface-dark);
  border-radius: var(--faq-radius);
  padding: 20px 16px 8px;
  border: 1px solid var(--faq-border-color);
  transition: border-color 0.3s;
}

.page-faq .faq-category:hover {
  border-color: rgba(57, 255, 20, 0.2);
}

.page-faq .faq-category-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(42, 47, 69, 0.5);
}

.page-faq .faq-category-icon {
  width: var(--faq-category-icon-size);
  height: var(--faq-category-icon-size);
  flex-shrink: 0;
  border-radius: 6px;
  object-fit: cover;
  background: var(--bg-dark);
  border: 1px solid var(--faq-border-color);
}

.page-faq .faq-category-title {
  font-family: Montserrat, 'Noto Sans SC', sans-serif;
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: 0.06em;
  color: var(--text-primary);
  margin: 0;
  line-height: 1.3;
}

/* ===== 条目列表 ===== */
.page-faq .faq-list {
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-faq .faq-item {
  background: var(--bg-dark);
  border-radius: 6px;
  border: 1px solid transparent;
  transition: background 0.25s, border-color 0.25s;
  overflow: hidden;
}

.page-faq .faq-item:hover {
  background: rgba(19, 23, 36, 0.8);
  border-color: rgba(0, 212, 255, 0.15);
}

/* ===== 问题（可点击） ===== */
.page-faq .faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  cursor: pointer;
  user-select: none;
  font-weight: 600;
  font-size: 1rem;
  color: var(--faq-text-question);
  letter-spacing: 0.02em;
  transition: color 0.2s, background 0.2s;
  margin: 0;
  outline: none;
}

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

.page-faq .faq-q-text {
  flex: 1;
  min-width: 0;
  line-height: 1.4;
}

.page-faq .faq-q-indicator {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  color: var(--text-secondary);
  transition: transform 0.3s ease, color 0.3s;
}

.page-faq .faq-item[data-open] .faq-q-indicator {
  transform: rotate(180deg);
  color: var(--neon-green);
}

.page-faq .faq-item[data-open] .faq-question {
  color: var(--neon-green);
  background: rgba(57, 255, 20, 0.04);
}

/* ===== 答案 ===== */
.page-faq .faq-answer {
  max-height: 0;
  overflow-y: auto;
  padding: 0 16px;
  margin: 0;
  color: var(--faq-text-answer);
  font-size: 0.95rem;
  line-height: 1.6;
  transition: max-height 0.4s ease, padding 0.3s ease, opacity 0.3s;
  opacity: 0;
  scrollbar-width: thin;
  scrollbar-color: var(--neon-green) var(--surface-dark);
}

.page-faq .faq-answer::-webkit-scrollbar {
  width: 4px;
}

.page-faq .faq-answer::-webkit-scrollbar-track {
  background: var(--surface-dark);
}

.page-faq .faq-answer::-webkit-scrollbar-thumb {
  background: var(--neon-green);
  border-radius: 4px;
}

.page-faq .faq-item[data-open] .faq-answer {
  max-height: 400px;
  padding: 0 16px 16px;
  opacity: 1;
}

.page-faq .faq-answer p {
  margin: 0 0 8px;
}

.page-faq .faq-answer p:last-child {
  margin-bottom: 0;
}

.page-faq .faq-internal-link {
  display: inline-block;
  color: var(--metal-gold);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9rem;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s, color 0.2s;
  margin-top: 4px;
}

.page-faq .faq-internal-link:hover {
  border-bottom-color: var(--metal-gold);
  color: var(--text-primary);
}

.page-faq .faq-internal-link::after {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  border-top: 2px solid currentColor;
  border-right: 2px solid currentColor;
  transform: rotate(45deg);
  margin-left: 4px;
  vertical-align: middle;
}

/* ===== 脚注 ===== */
.page-faq .faq-footnote {
  margin-top: 40px;
  padding: 20px 16px;
  background: var(--surface-dark);
  border-radius: var(--faq-radius);
  border: 1px solid var(--faq-border-color);
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.page-faq .faq-footnote a {
  color: var(--electric-blue);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s;
}

.page-faq .faq-footnote a:hover {
  border-bottom-color: var(--electric-blue);
}

.page-faq .trust-statement {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--faq-border-color);
  font-size: 0.85rem;
  color: var(--text-secondary);
  opacity: 0.8;
}

/* ===== 窄屏适配（移动端优先基准） ===== */
@media (max-width: 480px) {
  .page-faq {
    padding: 20px 12px 36px;
  }

  .page-faq .faq-hero {
    flex-direction: column;
    text-align: center;
    gap: 12px;
    padding: 16px 0 12px;
  }

  .page-faq .faq-hero-icon {
    width: 64px;
    height: 64px;
  }

  .page-faq .faq-title {
    font-size: 1.6rem;
  }

  .page-faq .faq-subtitle {
    font-size: 0.85rem;
  }

  .page-faq .faq-category {
    padding: 16px 12px 6px;
    margin-bottom: 24px;
  }

  .page-faq .faq-category-head {
    gap: 10px;
  }

  .page-faq .faq-category-icon {
    width: 40px;
    height: 40px;
  }

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

  .page-faq .faq-question {
    padding: 12px 12px;
    font-size: 0.95rem;
  }

  .page-faq .faq-answer {
    font-size: 0.9rem;
  }

  .page-faq .faq-search-input {
    height: 44px;
    font-size: 0.95rem;
    padding-left: 42px;
  }

  .page-faq .faq-search-wrap {
    margin-bottom: 24px;
  }

  .page-faq .faq-footnote {
    padding: 16px 12px;
    font-size: 0.85rem;
  }
}

/* ===== 桌面端增强 ===== */
@media (min-width: 768px) {
  .page-faq {
    padding: 48px 32px 64px;
  }

  .page-faq .faq-hero {
    gap: 28px;
    padding: 32px 0 20px;
  }

  .page-faq .faq-hero-icon {
    width: 100px;
    height: 100px;
  }

  .page-faq .faq-title {
    font-size: 2.5rem;
  }

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

  .page-faq .faq-category {
    padding: 28px 24px 12px;
    margin-bottom: 40px;
  }

  .page-faq .faq-category-title {
    font-size: 1.4rem;
  }

  .page-faq .faq-question {
    padding: 16px 20px;
    font-size: 1.05rem;
  }

  .page-faq .faq-answer {
    padding: 0 20px;
    font-size: 1rem;
  }

  .page-faq .faq-item[data-open] .faq-answer {
    padding: 0 20px 20px;
  }

  .page-faq .faq-search-input {
    height: 52px;
    font-size: 1.05rem;
    padding-left: 52px;
  }

  .page-faq .faq-search-icon {
    left: 16px;
  }

  .page-faq .faq-footnote {
    padding: 24px;
    font-size: 0.95rem;
  }
}

/* ===== 大屏宽版 ===== */
@media (min-width: 1200px) {
  .page-faq .container {
    max-width: 960px;
  }

  .page-faq .faq-hero-icon {
    width: 120px;
    height: 120px;
  }
}