/* ===== 页面专属：.page-faq ===== */
.page-faq {
  --faq-accent: #39ff14;
  --faq-accent-dim: rgba(57, 255, 20, 0.12);
  --faq-accent-glow: rgba(57, 255, 20, 0.25);
  --faq-orange: #ff6b35;
  --faq-card-bg: rgba(10, 31, 61, 0.82);
  --faq-border: rgba(57, 255, 20, 0.15);
  --faq-text: #e0e6ed;
  --faq-heading: #ffffff;
  --faq-radius: 10px;
  --faq-transition: 0.32s cubic-bezier(0.22, 0.61, 0.36, 1);
  --faq-sidebar-width: 240px;

  display: block;
  width: 100%;
  max-width: 100%;
  background-color: #0a1f3d;
  color: var(--faq-text);
  font-family: 'Inter', 'Segoe UI', Roboto, Arial, sans-serif;
  line-height: 1.6;
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* ===== 首屏横幅 ===== */
.page-faq__banner {
  position: relative;
  width: 100%;
  padding: 2.5rem 1.25rem 2rem;
  background: linear-gradient(135deg, #0a1f3d 40%, #0d2b52 80%, #0a1f3d 100%);
  overflow: hidden;
  border-bottom: 1px solid var(--faq-border);
}
.page-faq__banner-inner {
  max-width: var(--content-max-width, 1200px);
  margin: 0 auto;
  position: relative;
  z-index: 2;
}
.page-faq__breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  font-family: 'Source Code Pro', Consolas, monospace;
  color: var(--faq-text);
  opacity: 0.7;
  margin-bottom: 0.75rem;
}
.page-faq__breadcrumb-link {
  color: var(--faq-accent);
  text-decoration: none;
  transition: opacity 0.2s;
}
.page-faq__breadcrumb-link:hover {
  opacity: 0.8;
  text-decoration: underline;
}
.page-faq__breadcrumb-sep {
  color: var(--faq-text);
  opacity: 0.4;
}
.page-faq__breadcrumb-current {
  color: var(--faq-heading);
}
.page-faq__title {
  font-family: Impact, 'Helvetica Neue', Arial, sans-serif;
  font-size: 2.6rem;
  font-weight: 700;
  color: var(--faq-heading);
  line-height: 1.15;
  margin: 0 0 0.35rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}
.page-faq__subtitle {
  font-size: 1rem;
  color: var(--faq-text);
  opacity: 0.8;
  margin: 0;
  font-family: 'Source Code Pro', Consolas, monospace;
  letter-spacing: 0.04em;
}
.page-faq__banner-glow {
  position: absolute;
  top: -40%;
  right: -10%;
  width: 280px;
  height: 280px;
  background: radial-gradient(circle, rgba(57,255,20,0.08) 0%, transparent 70%);
  pointer-events: none;
  z-index: 1;
}

/* ===== 布局：侧边栏 + 主内容 ===== */
.page-faq__layout {
  display: flex;
  flex-wrap: wrap;
  max-width: var(--content-max-width, 1200px);
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
  gap: 1.5rem;
}

/* ===== 侧边栏 ===== */
.page-faq__sidebar {
  flex: 0 0 100%;
  max-width: 100%;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.page-faq__sidebar-card {
  background: var(--faq-card-bg);
  border: 1px solid var(--faq-border);
  border-radius: var(--faq-radius);
  padding: 1rem 1.1rem;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.page-faq__sidebar-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.7rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid rgba(57,255,20,0.12);
}
.page-faq__sidebar-icon {
  flex-shrink: 0;
}
.page-faq__sidebar-label {
  font-family: 'Source Code Pro', Consolas, monospace;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--faq-accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.page-faq__sidebar-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}
.page-faq__sidebar-link {
  display: block;
  padding: 0.4rem 0.5rem;
  font-size: 0.9rem;
  color: var(--faq-text);
  text-decoration: none;
  border-radius: 4px;
  transition: background 0.2s, color 0.2s, padding-left 0.2s;
  font-family: 'Inter', 'Segoe UI', Roboto, Arial, sans-serif;
}
.page-faq__sidebar-link:hover {
  background: var(--faq-accent-dim);
  color: var(--faq-accent);
  padding-left: 0.8rem;
}
.page-faq__sidebar-panel {
  background: var(--faq-card-bg);
  border: 1px solid var(--faq-border);
  border-radius: var(--faq-radius);
  padding: 1rem 1.1rem;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  border-left: 3px solid var(--faq-accent);
}
.page-faq__panel-label {
  font-size: 0.7rem;
  font-family: 'Source Code Pro', Consolas, monospace;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--faq-accent);
  opacity: 0.8;
}
.page-faq__panel-value {
  font-size: 1rem;
  font-weight: 600;
  color: var(--faq-heading);
}
.page-faq__panel-meta {
  font-size: 0.8rem;
  color: var(--faq-orange);
  font-family: 'Source Code Pro', Consolas, monospace;
}

/* ===== 主内容区 ===== */
.page-faq__content {
  flex: 1 1 0;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

/* ===== 分区标题 ===== */
.page-faq__section {
  scroll-margin-top: 2rem;
}
.page-faq__section-title {
  font-family: Impact, 'Helvetica Neue', Arial, sans-serif;
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--faq-heading);
  margin: 0 0 0.3rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  line-height: 1.2;
}
.page-faq__section-num {
  font-family: 'Source Code Pro', Consolas, monospace;
  font-size: 1rem;
  color: var(--faq-accent);
  opacity: 0.7;
  font-weight: 400;
}
.page-faq__section-desc {
  font-size: 0.95rem;
  color: var(--faq-text);
  opacity: 0.7;
  margin: 0 0 1.2rem;
  border-left: 2px solid var(--faq-accent);
  padding-left: 0.8rem;
}

/* ===== 手风琴 ===== */
.page-faq__accordion {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.page-faq__accordion-item {
  background: var(--faq-card-bg);
  border: 1px solid var(--faq-border);
  border-radius: var(--faq-radius);
  overflow: hidden;
  transition: border-color var(--faq-transition);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}
.page-faq__accordion-item:focus-within {
  border-color: var(--faq-accent);
  box-shadow: 0 0 0 2px var(--faq-accent-dim);
}
.page-faq__accordion-trigger {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  width: 100%;
  padding: 0.85rem 1rem;
  background: transparent;
  border: none;
  color: var(--faq-heading);
  font-size: 0.95rem;
  font-family: 'Inter', 'Segoe UI', Roboto, Arial, sans-serif;
  font-weight: 500;
  text-align: left;
  cursor: pointer;
  transition: background var(--faq-transition);
  position: relative;
  line-height: 1.4;
}
.page-faq__accordion-trigger:hover {
  background: var(--faq-accent-dim);
}
.page-faq__accordion-q {
  font-family: 'Source Code Pro', Consolas, monospace;
  color: var(--faq-accent);
  font-weight: 600;
  flex-shrink: 0;
  font-size: 0.85rem;
}
.page-faq__accordion-question {
  flex: 1;
  min-width: 0;
}
.page-faq__accordion-icon {
  flex-shrink: 0;
  width: 16px;
  height: 16px;
  color: var(--faq-accent);
  transition: transform var(--faq-transition);
}
.page-faq__accordion-trigger[aria-expanded="true"] .page-faq__accordion-icon {
  transform: rotate(180deg);
}
.page-faq__accordion-content {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--faq-transition);
}
.page-faq__accordion-content[aria-hidden="false"] {
  grid-template-rows: 1fr;
}
.page-faq__accordion-body {
  overflow: hidden;
  padding: 0 1rem 0 1rem;
  color: var(--faq-text);
  font-size: 0.92rem;
  line-height: 1.65;
}
.page-faq__accordion-trigger[aria-expanded="true"] + .page-faq__accordion-content .page-faq__accordion-body {
  padding-bottom: 1rem;
}
.page-faq__accordion-body p {
  margin: 0 0 0.5rem;
}
.page-faq__accordion-body p:last-child {
  margin-bottom: 0;
}

/* ===== 链接与按钮 ===== */
.page-faq__link {
  display: inline-block;
  color: var(--faq-accent);
  font-family: 'Source Code Pro', Consolas, monospace;
  font-size: 0.85rem;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s, opacity 0.2s;
  margin-top: 0.3rem;
}
.page-faq__link:hover {
  border-bottom-color: var(--faq-accent);
  opacity: 0.85;
}
.page-faq__btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.6rem 1.2rem;
  font-family: 'Inter', 'Segoe UI', Roboto, Arial, sans-serif;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: 6px;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.25s, transform 0.2s, box-shadow 0.25s;
}
.page-faq__btn--primary {
  background: var(--faq-accent);
  color: #0a1f3d;
}
.page-faq__btn--primary:hover {
  background: #2de010;
  box-shadow: 0 0 18px var(--faq-accent-glow);
  transform: translateY(-1px);
}

/* ===== 图片装饰 ===== */
.page-faq__img-wrap {
  margin-top: 0.6rem;
}
.page-faq__img-icon {
  display: block;
  max-width: 100%;
  height: auto;
  object-fit: contain;
  border-radius: 6px;
  border: 1px solid var(--faq-border);
  background: rgba(10,31,61,0.5);
}
.page-faq__panel-visual {
  margin-top: 1.2rem;
}
.page-faq__panel-img {
  display: block;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--faq-radius);
  border: 1px solid var(--faq-border);
  background: rgba(10,31,61,0.4);
}

/* ===== 联系卡片 ===== */
.page-faq__contact-card {
  background: var(--faq-card-bg);
  border: 1px solid var(--faq-border);
  border-radius: var(--faq-radius);
  padding: 1.25rem 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  border-left: 3px solid var(--faq-orange);
}
.page-faq__contact-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--faq-text);
}
.page-faq__contact-icon {
  flex-shrink: 0;
  opacity: 0.8;
}
.page-faq__contact-link {
  color: var(--faq-accent);
  text-decoration: none;
}
.page-faq__contact-link:hover {
  text-decoration: underline;
}
.page-faq__contact-note {
  font-size: 0.85rem;
  color: var(--faq-text);
  opacity: 0.65;
  margin: 0.2rem 0 0;
  padding-top: 0.4rem;
  border-top: 1px solid rgba(57,255,20,0.08);
}

/* ===== 桌面端（≥768px） ===== */
@media (min-width: 768px) {
  .page-faq__banner {
    padding: 3rem 2rem 2.5rem;
  }
  .page-faq__title {
    font-size: 3rem;
  }
  .page-faq__layout {
    padding: 2rem 2rem 4rem;
    flex-wrap: nowrap;
    gap: 2rem;
  }
  .page-faq__sidebar {
    flex: 0 0 var(--faq-sidebar-width);
    max-width: var(--faq-sidebar-width);
    position: sticky;
    top: 1.5rem;
    align-self: flex-start;
    max-height: calc(100vh - 3rem);
    overflow-y: auto;
  }
  .page-faq__content {
    flex: 1 1 0;
    min-width: 0;
  }
  .page-faq__section-title {
    font-size: 2rem;
  }
  .page-faq__accordion-trigger {
    padding: 0.9rem 1.2rem;
    font-size: 0.98rem;
  }
  .page-faq__accordion-body {
    padding: 0 1.2rem 0 1.2rem;
  }
  .page-faq__accordion-trigger[aria-expanded="true"] + .page-faq__accordion-content .page-faq__accordion-body {
    padding-bottom: 1.1rem;
  }
  .page-faq__contact-card {
    padding: 1.5rem 1.5rem;
  }
  .page-faq__panel-img {
    max-width: 400px;
  }
}

/* ===== 大桌面端（≥1024px） ===== */
@media (min-width: 1024px) {
  .page-faq__banner {
    padding: 3.5rem 2.5rem 2.8rem;
  }
  .page-faq__title {
    font-size: 3.4rem;
  }
  .page-faq__sidebar {
    flex-basis: 260px;
    max-width: 260px;
  }
}

/* ===== 安全溢出与可访问性 ===== */
.page-faq *,
.page-faq *::before,
.page-faq *::after {
  box-sizing: border-box;
}
.page-faq img {
  max-width: 100%;
  height: auto;
}
.page-faq:focus-visible {
  outline: 2px solid var(--faq-accent);
  outline-offset: 2px;
}
.page-faq__accordion-trigger:focus-visible {
  outline: 2px solid var(--faq-accent);
  outline-offset: -2px;
}

/* ===== 暗色滚动条（侧边栏） ===== */
.page-faq__sidebar::-webkit-scrollbar {
  width: 4px;
}
.page-faq__sidebar::-webkit-scrollbar-track {
  background: transparent;
}
.page-faq__sidebar::-webkit-scrollbar-thumb {
  background: var(--faq-border);
  border-radius: 4px;
}
.page-faq__sidebar {
  scrollbar-width: thin;
  scrollbar-color: var(--faq-border) transparent;
}