/* ===== page-faq 专属样式 ===== */
.page-faq {
  --faq-glow: var(--color-accent, #00FF84);
  --faq-gold: var(--color-accent-alt, #F5B041);
  --faq-card-bg: rgba(15, 43, 92, 0.5);
  --faq-card-border: rgba(0, 255, 132, 0.15);
  --faq-radius: 8px;
  --faq-transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);

  display: block;
  max-width: var(--content-max-width, 1200px);
  margin: 0 auto;
  padding: 1.5rem var(--content-padding, 1.5rem) 3rem;
  color: var(--color-text-primary, #f0f4f8);
}

/* ---- 面包屑 ---- */
.faq-breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-body, 'Source Sans Pro', sans-serif);
  font-size: 0.875rem;
  margin-bottom: 1.5rem;
  color: var(--color-text-secondary, #b0c4de);
}
.faq-breadcrumb-link {
  color: var(--faq-glow);
  text-decoration: none;
  transition: opacity var(--faq-transition);
}
.faq-breadcrumb-link:hover,
.faq-breadcrumb-link:focus {
  opacity: 0.75;
  text-decoration: underline;
}
.faq-breadcrumb-sep {
  color: var(--color-text-secondary, #b0c4de);
  font-size: 0.75rem;
}
.faq-breadcrumb-current {
  color: var(--color-white, #ffffff);
  font-weight: 600;
}

/* ---- 顶部英雄区 ---- */
.faq-hero {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  margin-bottom: 2.5rem;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--faq-card-border);
}
.faq-hero-icon-wrap {
  flex-shrink: 0;
  width: 70px;
  height: 70px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, rgba(0,255,132,0.2), transparent 70%);
  border: 1px solid var(--faq-card-border);
}
.faq-hero-icon {
  display: block;
  width: 100%;
  height: auto;
  max-width: 70px;
  border-radius: 50%;
  object-fit: contain;
}
.faq-hero-content {
  flex: 1;
  min-width: 0;
}
.faq-hero-title {
  font-family: var(--font-heading, 'Inter', sans-serif);
  font-size: clamp(1.5rem, 5vw, 2.25rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 0.375rem;
  color: var(--color-white, #ffffff);
  text-shadow: 0 2px 8px rgba(0,0,0,0.3);
}
.faq-hero-desc {
  font-family: var(--font-body, 'Source Sans Pro', sans-serif);
  font-size: 1rem;
  line-height: 1.6;
  margin: 0;
  color: var(--color-text-secondary, #b0c4de);
  max-width: 600px;
}

/* ---- 布局容器 ---- */
.faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

/* ---- 主列表区 ---- */
.faq-main {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

/* ---- 章节 ---- */
.faq-section {
  padding: 1.5rem 0;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.faq-section:last-child {
  border-bottom: none;
}
.faq-section-title {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-family: var(--font-heading, 'Inter', sans-serif);
  font-size: clamp(1.25rem, 3.5vw, 1.625rem);
  font-weight: 700;
  color: var(--faq-gold);
  margin: 0 0 0.5rem;
  letter-spacing: 0.01em;
}
.faq-section-title-icon {
  font-size: 1.1em;
  color: var(--faq-glow);
  filter: drop-shadow(0 0 4px var(--faq-glow));
}
.faq-section-intro {
  font-family: var(--font-body, 'Source Sans Pro', sans-serif);
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--color-text-secondary, #b0c4de);
  margin: 0 0 1.25rem;
}

/* ---- 新版功能区域配图 ---- */
.faq-feature-visual {
  margin-bottom: 1.25rem;
  border-radius: var(--faq-radius);
  overflow: hidden;
  border: 1px solid var(--faq-card-border);
  background: var(--faq-card-bg);
  max-width: 100%;
  width: fit-content;
}
.faq-feature-img {
  display: block;
  width: 100%;
  max-width: 300px;
  height: auto;
  object-fit: cover;
  aspect-ratio: 300 / 200;
}

/* ---- 手风琴项 ---- */
.faq-item {
  display: block;
  margin-bottom: 0.75rem;
  border-radius: var(--faq-radius);
  background: var(--faq-card-bg);
  border: 1px solid transparent;
  transition: border-color var(--faq-transition), background var(--faq-transition);
}
.faq-item[open] {
  border-color: var(--faq-card-border);
  background: rgba(15, 43, 92, 0.7);
}
.faq-item:last-child {
  margin-bottom: 0;
}

/* ---- 问题（summary） ---- */
.faq-question {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  font-family: var(--font-heading, 'Inter', sans-serif);
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--color-white, #ffffff);
  cursor: pointer;
  list-style: none;
  user-select: none;
  transition: color var(--faq-transition);
}
.faq-question::-webkit-details-marker {
  display: none;
}
.faq-question::before {
  content: "+";
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.5rem;
  height: 1.5rem;
  flex-shrink: 0;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--faq-glow);
  border: 1px solid var(--faq-glow);
  border-radius: 4px;
  line-height: 1;
  transition: transform var(--faq-transition), background var(--faq-transition), color var(--faq-transition);
}
.faq-item[open] .faq-question::before {
  content: "–";
  background: var(--faq-glow);
  color: var(--color-deep-space, #0B1A34);
  transform: rotate(90deg);
}
.faq-question:hover,
.faq-question:focus {
  color: var(--faq-glow);
}
.faq-question:focus-visible {
  outline: 2px solid var(--faq-glow);
  outline-offset: -2px;
  border-radius: var(--faq-radius);
}

/* ---- 答案 ---- */
.faq-answer {
  padding: 0 1.25rem 1.25rem 3.25rem;
  font-family: var(--font-body, 'Source Sans Pro', sans-serif);
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--color-text-secondary, #b0c4de);
  animation: faqFadeIn 0.3s ease-out;
}
@keyframes faqFadeIn {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
.faq-answer p {
  margin: 0 0 0.5rem;
}
.faq-answer p:last-child {
  margin-bottom: 0;
}
.faq-inline-link {
  color: var(--faq-glow);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: opacity var(--faq-transition);
}
.faq-inline-link:hover,
.faq-inline-link:focus {
  opacity: 0.75;
}

/* ---- 侧边栏 ---- */
.faq-sidebar {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}
.faq-sidebar-card {
  padding: 1.5rem;
  border-radius: var(--faq-radius);
  background: var(--faq-card-bg);
  border: 1px solid var(--faq-card-border);
  backdrop-filter: blur(4px);
}
.faq-sidebar-card-title {
  font-family: var(--font-heading, 'Inter', sans-serif);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--faq-gold);
  margin: 0 0 1rem;
  letter-spacing: 0.02em;
}
.faq-sidebar-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.faq-sidebar-link {
  display: block;
  padding: 0.4rem 0;
  font-family: var(--font-body, 'Source Sans Pro', sans-serif);
  font-size: 0.95rem;
  color: var(--color-text-secondary, #b0c4de);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--faq-transition), border-color var(--faq-transition);
}
.faq-sidebar-link:hover,
.faq-sidebar-link:focus {
  color: var(--faq-glow);
  border-bottom-color: var(--faq-glow);
}
.faq-contact-info {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}
.faq-contact-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0;
  font-family: var(--font-body, 'Source Sans Pro', sans-serif);
  font-size: 0.9rem;
  color: var(--color-text-primary, #f0f4f8);
}
.faq-contact-label {
  flex-shrink: 0;
  width: 1.4rem;
  text-align: center;
  color: var(--faq-glow);
  filter: drop-shadow(0 0 2px var(--faq-glow));
}
.faq-contact-link {
  color: var(--faq-glow);
  text-decoration: underline;
  text-underline-offset: 2px;
  word-break: break-all;
}
.faq-contact-link:hover,
.faq-contact-link:focus {
  opacity: 0.8;
}
.faq-contact-value {
  color: var(--color-text-primary, #f0f4f8);
}
.faq-contact-note {
  margin: 0.5rem 0 0;
  font-size: 0.8rem;
  color: var(--color-text-secondary, #b0c4de);
  font-style: italic;
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: 0.5rem;
}

/* ---- 桌面端布局（≥ 768px） ---- */
@media (min-width: 768px) {
  .page-faq {
    padding-top: 2rem;
    padding-bottom: 4rem;
  }
  .faq-breadcrumb {
    font-size: 0.9rem;
    margin-bottom: 2rem;
  }
  .faq-hero {
    gap: 2rem;
    padding: 2rem 0;
    margin-bottom: 3rem;
  }
  .faq-hero-icon-wrap {
    width: 90px;
    height: 90px;
  }
  .faq-hero-icon {
    max-width: 90px;
  }
  .faq-hero-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
  }
  .faq-hero-desc {
    font-size: 1.1rem;
  }
  .faq-layout {
    grid-template-columns: 1fr 280px;
    gap: 2.5rem;
  }
  .faq-sidebar {
    position: sticky;
    top: calc(var(--header-height, 60px) + 1.5rem);
    align-self: start;
  }
  .faq-section-title {
    font-size: clamp(1.35rem, 2.5vw, 1.75rem);
  }
  .faq-question {
    padding: 1.125rem 1.5rem;
    font-size: 1.05rem;
  }
  .faq-answer {
    padding-left: 3.75rem;
    padding-right: 1.5rem;
    padding-bottom: 1.25rem;
    font-size: 0.975rem;
  }
  .faq-feature-img {
    max-width: 100%;
  }
}

/* ---- 宽屏（≥ 1024px） ---- */
@media (min-width: 1024px) {
  .faq-layout {
    grid-template-columns: 1fr 320px;
    gap: 3rem;
  }
  .faq-sidebar-card {
    padding: 1.75rem;
  }
  .faq-question {
    font-size: 1.1rem;
  }
}

/* ---- 确保无溢出 ---- */
@media (max-width: 400px) {
  .page-faq {
    padding-left: 1rem;
    padding-right: 1rem;
  }
  .faq-hero {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }
  .faq-hero-icon-wrap {
    width: 56px;
    height: 56px;
  }
  .faq-hero-icon {
    max-width: 56px;
  }
  .faq-answer {
    padding-left: 1.25rem;
    padding-right: 1rem;
  }
}