.page-faq {
  --faq-bg: var(--color-dark-card, #2C2C3A);
  --faq-border: var(--color-border, rgba(255,255,255,0.08));
  --faq-number-color: var(--color-primary, #E63946);
  --faq-accent: var(--color-accent, #00FF88);
  --faq-text: var(--color-white, #FFFFFF);
  --faq-text-muted: var(--color-medium-gray, #888888);
  --faq-radius: var(--radius-md, 8px);
  --faq-shadow: var(--shadow-card, 0 2px 8px rgba(0,0,0,0.08));
  --faq-shadow-hover: var(--shadow-hover, 0 8px 24px rgba(0,0,0,0.12));
  --faq-transition: var(--transition-smooth, 0.35s cubic-bezier(0.25,0.46,0.45,0.94));
  --faq-font-heading: var(--font-heading, Inter, sans-serif);
  --faq-font-mono: var(--font-mono, "JetBrains Mono", monospace);
}

/* 面包屑 */
.page-faq .breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--faq-font-mono);
  font-size: 0.875rem;
  color: var(--faq-text-muted);
  margin-bottom: 1.5rem;
  padding-top: 1rem;
}
.page-faq .breadcrumb a {
  color: var(--faq-text-muted);
  text-decoration: none;
  transition: color var(--faq-transition);
  position: relative;
}
.page-faq .breadcrumb a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 1px;
  background: var(--faq-accent);
  transition: width var(--faq-transition);
}
.page-faq .breadcrumb a:hover {
  color: var(--faq-accent);
}
.page-faq .breadcrumb a:hover::after {
  width: 100%;
}
.page-faq .breadcrumb__sep {
  color: var(--faq-number-color);
  font-weight: 700;
}
.page-faq .breadcrumb__current {
  color: var(--faq-text);
  font-weight: 500;
}

/* 页面标题区 */
.page-faq .section-title {
  margin-bottom: 1rem;
}
.page-faq .section__number {
  font-family: var(--faq-font-heading);
  font-size: 3rem;
  font-weight: 800;
  color: var(--faq-number-color);
  line-height: 1;
  display: block;
  letter-spacing: -0.02em;
}
.page-faq .section__heading {
  font-family: var(--faq-font-heading);
  font-size: 2rem;
  font-weight: 800;
  color: var(--faq-text);
  line-height: 1.15;
  margin: 0.25rem 0 0 0;
  letter-spacing: -0.01em;
}

/* 介绍文字 */
.page-faq .faq-intro {
  font-family: var(--faq-font-mono);
  font-size: 1rem;
  color: var(--faq-text-muted);
  line-height: 1.6;
  margin-bottom: 2rem;
  max-width: 640px;
  border-left: 3px solid var(--faq-accent);
  padding-left: 1rem;
}

/* FAQ网格 — 移动端优先（堆叠） */
.page-faq .faq-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin-bottom: 3rem;
}

/* 卡片基础样式 */
.page-faq .faq-card {
  background: var(--faq-bg);
  border: 1px solid var(--faq-border);
  border-radius: var(--faq-radius);
  box-shadow: var(--faq-shadow);
  transition: box-shadow var(--faq-transition), transform var(--faq-transition);
  position: relative;
  overflow: hidden;
}
.page-faq .faq-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--faq-number-color);
  opacity: 0.4;
  transition: opacity var(--faq-transition);
}
.page-faq .faq-card:hover {
  box-shadow: var(--faq-shadow-hover);
  transform: translateY(-2px);
}
.page-faq .faq-card:hover::before {
  opacity: 1;
}

/* 卡片内部 */
.page-faq .faq-card__inner {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

/* 卡片头部 */
.page-faq .faq-card__header {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
}
.page-faq .faq-card__number {
  font-family: var(--faq-font-heading);
  font-size: 2rem;
  font-weight: 800;
  color: var(--faq-number-color);
  line-height: 1;
  flex-shrink: 0;
  letter-spacing: -0.02em;
}
.page-faq .faq-card__title {
  font-family: var(--faq-font-heading);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--faq-text);
  margin: 0;
  line-height: 1.3;
}

/* 卡片体 */
.page-faq .faq-card__body {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

/* 图片包装 */
.page-faq .faq-card__image-wrapper {
  width: 100%;
  max-width: 200px;
  border-radius: var(--faq-radius);
  overflow: hidden;
  border: 1px solid var(--faq-border);
  background: var(--color-dark, #1D1D2A);
  flex-shrink: 0;
}
.page-faq .faq-card__image-wrapper img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 1 / 1;
}

/* details / summary */
.page-faq .faq-card__details {
  font-family: var(--faq-font-mono);
  font-size: 0.9375rem;
  color: var(--faq-text);
  line-height: 1.6;
  width: 100%;
}

/* summary — 荧光绿展开按钮 */
.page-faq .faq-card__summary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  list-style: none;
  font-family: var(--faq-font-heading);
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--faq-accent);
  background: transparent;
  border: 1px solid var(--faq-accent);
  border-radius: 4px;
  padding: 0.5rem 1rem;
  transition: background var(--faq-transition), color var(--faq-transition);
  user-select: none;
  margin-top: 0.25rem;
}
.page-faq .faq-card__summary::-webkit-details-marker {
  display: none;
}
.page-faq .faq-card__summary:hover {
  background: var(--faq-accent);
  color: var(--color-dark, #1D1D2A);
}
.page-faq .faq-card__summary:focus-visible {
  outline: 2px solid var(--faq-accent);
  outline-offset: 2px;
}

/* 展开图标旋转 */
.page-faq .faq-card__summary-icon {
  display: inline-block;
  font-size: 1.25rem;
  line-height: 1;
  font-weight: 700;
  transition: transform var(--faq-transition);
}
.page-faq details[open] .faq-card__summary-icon {
  transform: rotate(45deg);
}

/* 答案内容 */
.page-faq .faq-card__answer {
  padding: 1rem 0 0.25rem 0;
  border-top: 1px solid var(--faq-border);
  margin-top: 0.75rem;
  animation: faqFadeIn 0.3s ease-out;
}
.page-faq .faq-card__answer p {
  margin: 0 0 0.75rem 0;
  font-size: 0.9375rem;
  color: var(--faq-text);
  font-family: var(--faq-font-mono);
  line-height: 1.7;
}
.page-faq .faq-card__answer p:last-child {
  margin-bottom: 0;
}
.page-faq .faq-card__answer a {
  color: var(--faq-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
  transition: color var(--faq-transition);
}
.page-faq .faq-card__answer a:hover {
  color: var(--faq-number-color);
}

@keyframes faqFadeIn {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 帮助区域 */
.page-faq .faq-help {
  text-align: center;
  padding: 2.5rem 1.5rem;
  border-top: 1px solid var(--faq-border);
  margin-top: 0.5rem;
}
.page-faq .faq-help__text {
  font-family: var(--faq-font-mono);
  font-size: 1rem;
  color: var(--faq-text-muted);
  margin: 0 0 1rem 0;
}
.page-faq .faq-help .btn--primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--faq-font-heading);
  font-weight: 700;
  font-size: 0.9375rem;
  color: var(--color-white, #FFFFFF);
  background: var(--color-primary, #E63946);
  border: none;
  border-radius: 4px;
  padding: 0.75rem 1.75rem;
  text-decoration: none;
  transition: background var(--faq-transition), transform var(--faq-transition);
  cursor: pointer;
}
.page-faq .faq-help .btn--primary:hover {
  background: var(--color-primary-light, #FF6B6B);
  transform: translateY(-1px);
}
.page-faq .faq-help .btn--primary:focus-visible {
  outline: 2px solid var(--faq-accent);
  outline-offset: 2px;
}

/* ===== 桌面端（≥768px） ===== */
@media (min-width: 768px) {
  .page-faq .page-container {
    max-width: var(--max-width, 1200px);
    margin: 0 auto;
    padding: 0 2rem;
  }
  .page-faq .breadcrumb {
    font-size: 0.9375rem;
    margin-bottom: 2rem;
    padding-top: 1.5rem;
  }
  .page-faq .section__number {
    font-size: 4rem;
  }
  .page-faq .section__heading {
    font-size: 2.5rem;
  }
  .page-faq .faq-intro {
    font-size: 1.0625rem;
    margin-bottom: 2.5rem;
  }

  /* 非对称Bento网格 */
  .page-faq .faq-grid {
    grid-template-columns: 1fr 1fr 1fr;
    grid-template-rows: auto auto;
    grid-template-areas:
      "q1 q1 q2"
      "q3 q4 q4";
    gap: 1.5rem;
  }

  /* Q1 大卡片 */
  .page-faq .faq-card--q1 .faq-card__inner {
    padding: 1.5rem;
  }
  .page-faq .faq-card--q1 .faq-card__body {
    flex-direction: row;
    align-items: flex-start;
    gap: 1.25rem;
  }
  .page-faq .faq-card--q1 .faq-card__image-wrapper {
    max-width: 160px;
    flex-shrink: 0;
  }
  .page-faq .faq-card--q1 .faq-card__details {
    flex: 1;
  }
  .page-faq .faq-card--q1 .faq-card__title {
    font-size: 1.25rem;
  }

  /* Q2 中等卡片 */
  .page-faq .faq-card--q2 .faq-card__inner {
    padding: 1.5rem;
  }
  .page-faq .faq-card--q2 .faq-card__image-wrapper {
    max-width: 140px;
  }
  .page-faq .faq-card--q2 .faq-card__title {
    font-size: 1.125rem;
  }

  /* Q3 中等卡片 */
  .page-faq .faq-card--q3 .faq-card__inner {
    padding: 1.5rem;
  }
  .page-faq .faq-card--q3 .faq-card__title {
    font-size: 1.125rem;
  }

  /* Q4 大卡片 */
  .page-faq .faq-card--q4 .faq-card__inner {
    padding: 1.5rem;
  }
  .page-faq .faq-card--q4 .faq-card__body {
    flex-direction: row;
    align-items: flex-start;
    gap: 1.25rem;
  }
  .page-faq .faq-card--q4 .faq-card__details {
    flex: 1;
  }
  .page-faq .faq-card--q4 .faq-card__title {
    font-size: 1.25rem;
  }

  .page-faq .faq-card__number {
    font-size: 2.5rem;
  }
  .page-faq .faq-card__summary {
    font-size: 0.9375rem;
    padding: 0.5rem 1.25rem;
  }
  .page-faq .faq-card__answer p {
    font-size: 1rem;
  }
  .page-faq .faq-help {
    padding: 3rem 2rem;
  }
}

/* ===== 大桌面端（≥1024px） ===== */
@media (min-width: 1024px) {
  .page-faq .faq-grid {
    gap: 1.75rem;
  }
  .page-faq .faq-card--q1 .faq-card__inner,
  .page-faq .faq-card--q4 .faq-card__inner {
    padding: 2rem;
  }
  .page-faq .faq-card--q2 .faq-card__inner,
  .page-faq .faq-card--q3 .faq-card__inner {
    padding: 1.75rem;
  }
  .page-faq .faq-card--q1 .faq-card__image-wrapper {
    max-width: 180px;
  }
  .page-faq .faq-card--q2 .faq-card__image-wrapper {
    max-width: 160px;
  }
  .page-faq .faq-card__number {
    font-size: 3rem;
  }
  .page-faq .faq-card__title {
    font-size: 1.25rem;
  }
  .page-faq .section__number {
    font-size: 5rem;
  }
  .page-faq .section__heading {
    font-size: 3rem;
  }
}

/* ===== 确保不横向溢出 ===== */
@media (max-width: 767px) {
  .page-faq .page-container {
    padding: 0 1rem;
  }
  .page-faq .faq-card__image-wrapper {
    max-width: 100%;
  }
  .page-faq .faq-card__image-wrapper img {
    width: 100%;
    height: auto;
    aspect-ratio: 1 / 1;
  }
  .page-faq .faq-card__title {
    font-size: 1rem;
  }
  .page-faq .faq-card__number {
    font-size: 1.75rem;
  }
}
/* 极端窄屏保护 */
@media (max-width: 360px) {
  .page-faq .faq-card__header {
    flex-wrap: wrap;
    gap: 0.5rem;
  }
  .page-faq .faq-card__summary {
    font-size: 0.8125rem;
    padding: 0.4rem 0.75rem;
  }
  .page-faq .faq-card__answer p {
    font-size: 0.875rem;
  }
}