/* ===== 帮助中心 · 页面专属样式 (page-faq) ===== */
.page-faq {
  /* 背景深灰 + 微网格纹理 */
  background-color: var(--color-bg-dark, #212121);
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 24px 24px;
  color: var(--color-text-primary, #ffffff);
  font-family: var(--font-body, 'Inter', system-ui, sans-serif);
  padding: 0 0 2.5rem 0;
  min-height: 70vh;
}

/* 面包屑 */
.page-faq .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  padding: 1.2rem 0 0.6rem 0;
  font-size: 0.85rem;
  color: var(--color-text-secondary, #b0bec5);
}
.page-faq .breadcrumbs__link {
  color: var(--color-blue, #1e88e5);
  text-decoration: none;
  transition: color var(--transition-speed, 0.3s);
}
.page-faq .breadcrumbs__link:hover {
  color: var(--color-red, #e53935);
  text-decoration: underline;
}
.page-faq .breadcrumbs__separator {
  color: var(--color-text-secondary, #b0bec5);
  user-select: none;
}
.page-faq .breadcrumbs__current {
  color: var(--color-text-primary, #ffffff);
  font-weight: 600;
}

/* 页面标题区 */
.page-faq .faq-header {
  padding: 1.2rem 0 2rem 0;
  border-bottom: 2px solid;
  border-image: var(--color-line-grad, linear-gradient(135deg, #e53935, #1e88e5)) 1;
  margin-bottom: 1.8rem;
}
.page-faq .faq-header__title {
  font-family: var(--font-heading, 'Impact', 'Montserrat Black', sans-serif);
  font-size: clamp(2.2rem, 6vw, 3.8rem);
  color: var(--color-red, #e53935);
  margin: 0 0 0.4rem 0;
  letter-spacing: 0.02em;
  line-height: 1.1;
  transform: skewX(-6deg);
  transform-origin: left center;
}
.page-faq .faq-header__desc {
  font-size: 1rem;
  line-height: 1.5;
  color: var(--color-text-secondary, #b0bec5);
  margin: 0;
  max-width: 600px;
}

/* ===== 对话式两栏布局 ===== */
.page-faq .faq-layout {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}
.page-faq .faq-main {
  flex: 1;
  min-width: 0;
}
.page-faq .faq-sidebar {
  flex: 0 0 auto;
  width: 100%;
}

/* ===== 问题区块 ===== */
.page-faq .faq-section {
  margin-bottom: 2.4rem;
}
.page-faq .faq-section:last-of-type {
  margin-bottom: 0;
}
.page-faq .faq-section__title {
  font-family: var(--font-heading, 'Impact', 'Montserrat Black', sans-serif);
  font-size: clamp(1.1rem, 2.5vw, 1.5rem);
  color: var(--color-yellow, #ffc107);
  margin: 0 0 1rem 0;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  letter-spacing: 0.03em;
}

/* ===== 折叠面板项 ===== */
.page-faq .faq-item {
  background-color: var(--color-bg-card, #2c2c2c);
  border-radius: 0;
  margin-bottom: 0.5rem;
  transition: background-color var(--transition-speed, 0.3s);
  border-left: 3px solid var(--color-blue, #1e88e5);
}
.page-faq .faq-item:hover {
  background-color: #3a3a3a;
}

/* 隐藏 checkbox */
.page-faq .faq-item__toggle {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* 问题标签（可点击区域） */
.page-faq .faq-item__question {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  cursor: pointer;
  user-select: none;
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-blue, #1e88e5);
  transition: color var(--transition-speed, 0.3s);
  line-height: 1.4;
  position: relative;
}
.page-faq .faq-item__question::after {
  content: "+";
  position: absolute;
  right: 1.25rem;
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-red, #e53935);
  transition: transform var(--transition-speed, 0.3s);
  line-height: 1;
}
.page-faq .faq-item__toggle:checked + .faq-item__question::after {
  content: "−";
  transform: rotate(0deg);
}
.page-faq .faq-item__question:hover {
  color: var(--color-red, #e53935);
}

/* 问号图标 */
.page-faq .faq-icon {
  flex-shrink: 0;
  display: block;
  width: 32px;
  height: 32px;
}

/* 答案区域（折叠动画） */
.page-faq .faq-item__answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94),
              padding 0.3s ease;
  padding: 0 1.25rem 0 4.2rem;
  color: var(--color-text-primary, #ffffff);
  font-size: 0.95rem;
  line-height: 1.6;
  background-color: rgba(0, 0, 0, 0.12);
}
.page-faq .faq-item__answer p {
  margin: 0.6rem 0;
}
.page-faq .faq-item__answer a {
  color: var(--color-yellow, #ffc107);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--transition-speed, 0.3s);
}
.page-faq .faq-item__answer a:hover {
  color: var(--color-red, #e53935);
}

/* 展开状态 */
.page-faq .faq-item__toggle:checked ~ .faq-item__answer {
  max-height: 500px;
  padding: 0.5rem 1.25rem 1rem 4.2rem;
}

/* ===== 侧边栏 · 联系卡 ===== */
.page-faq .contact-card {
  background-color: var(--color-bg-card, #2c2c2c);
  padding: 1.5rem;
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-top: 4px solid var(--color-red, #e53935);
}
.page-faq .contact-card__title {
  font-family: var(--font-heading, 'Impact', 'Montserrat Black', sans-serif);
  font-size: 1.3rem;
  color: var(--color-yellow, #ffc107);
  margin: 0 0 1rem 0;
  letter-spacing: 0.02em;
}
.page-faq .contact-card__img {
  display: block;
  width: 120px;
  height: auto;
  max-width: 100%;
  object-fit: contain;
  margin: 0 auto 1.2rem auto;
  opacity: 0.85;
}
.page-faq .contact-card__info {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}
.page-faq .contact-card__item {
  display: flex;
  flex-direction: column;
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.5;
}
.page-faq .contact-card__label {
  font-size: 0.8rem;
  color: var(--color-text-secondary, #b0bec5);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.15rem;
}
.page-faq .contact-card__link {
  color: var(--color-blue, #1e88e5);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-speed, 0.3s);
}
.page-faq .contact-card__link:hover {
  color: var(--color-red, #e53935);
  text-decoration: underline;
}
.page-faq .contact-card__note {
  margin: 0.6rem 0 0 0;
  font-size: 0.8rem;
  color: var(--color-text-secondary, #b0bec5);
  font-style: italic;
  padding-top: 0.6rem;
  border-top: 1px dashed rgba(255, 255, 255, 0.08);
}
.page-faq .contact-card__more {
  margin: 0.6rem 0 0 0;
}
.page-faq .contact-card__more-link {
  color: var(--color-yellow, #ffc107);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition-speed, 0.3s);
}
.page-faq .contact-card__more-link:hover {
  color: var(--color-red, #e53935);
  text-decoration: underline;
}

/* 侧边栏底部图片 */
.page-faq .faq-sidebar__img {
  display: block;
  width: 100%;
  max-width: 400px;
  height: auto;
  object-fit: contain;
  margin: 1.5rem auto 0 auto;
  opacity: 0.7;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

/* ===== 信任声明 ===== */
.page-faq .trust-statement {
  margin-top: 2.5rem;
  padding: 1rem 1.25rem;
  background-color: rgba(255, 255, 255, 0.03);
  border-left: 3px solid var(--color-blue, #1e88e5);
}
.page-faq .trust-statement p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--color-text-secondary, #b0bec5);
  line-height: 1.5;
}

/* ===== 桌面端 (≥768px) ===== */
@media (min-width: 768px) {
  .page-faq {
    padding: 0 0 3rem 0;
  }
  .page-faq .faq-layout {
    flex-direction: row;
    align-items: flex-start;
    gap: 2.5rem;
  }
  .page-faq .faq-main {
    flex: 2;
  }
  .page-faq .faq-sidebar {
    flex: 1;
    max-width: 360px;
    position: sticky;
    top: calc(var(--nav-height, 60px) + 1.5rem);
  }
  .page-faq .faq-header__title {
    font-size: 3.2rem;
  }
  .page-faq .faq-item__question {
    padding: 1rem 1.5rem;
    font-size: 1.05rem;
  }
  .page-faq .faq-item__answer {
    padding-left: 4.6rem;
  }
  .page-faq .faq-item__toggle:checked ~ .faq-item__answer {
    padding-left: 4.6rem;
    padding-right: 1.5rem;
  }
  .page-faq .contact-card {
    padding: 1.8rem;
  }
  .page-faq .contact-card__img {
    width: 140px;
  }
  .page-faq .faq-sidebar__img {
    max-width: 100%;
  }
  .page-faq .trust-statement {
    margin-top: 3rem;
    padding: 1.25rem 1.5rem;
  }
}

/* ===== 宽桌面 (≥1024px) ===== */
@media (min-width: 1024px) {
  .page-faq .faq-layout {
    gap: 3rem;
  }
  .page-faq .faq-main {
    flex: 3;
  }
  .page-faq .faq-sidebar {
    flex: 1.2;
    max-width: 400px;
  }
  .page-faq .faq-header__title {
    font-size: 3.8rem;
  }
}

/* ===== 减少动效 ===== */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__answer {
    transition: none;
  }
  .page-faq .faq-item__question::after {
    transition: none;
  }
  .page-faq .faq-item__question,
  .page-faq .faq-item__answer a,
  .page-faq .contact-card__link,
  .page-faq .contact-card__more-link {
    transition: none;
  }
  .page-faq .faq-item:hover {
    background-color: var(--color-bg-card, #2c2c2c);
  }
}

/* ===== 图片响应式 ===== */
.page-faq img {
  max-width: 100%;
  height: auto;
}