/* ===== FAQ 页面专属样式 ===== */
.page-faq {
  --faq-sidebar-width: 240px;
  --faq-gap: 1.5rem;
  --faq-border-color: rgba(138, 43, 226, 0.35);
  --faq-active-bg: rgba(138, 43, 226, 0.12);
  --faq-hover-shadow: 0 6px 20px rgba(0, 255, 135, 0.08);
  --faq-transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);

  display: block;
  max-width: 1440px;
  margin: 0 auto;
  padding: 1rem 1rem 2.5rem;
  color: var(--clr-light-gray);
  font-family: var(--font-sans);
}

/* 面包屑 */
.page-faq .breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  color: var(--clr-mid-gray);
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}
.page-faq .breadcrumb a {
  color: var(--clr-bright-orange);
  text-decoration: none;
  transition: opacity var(--faq-transition);
}
.page-faq .breadcrumb a:hover {
  opacity: 0.8;
  text-decoration: underline;
}
.page-faq .breadcrumb-sep {
  color: var(--clr-mid-gray);
  user-select: none;
}

/* 左右分屏容器 */
.page-faq .faq-layout {
  display: flex;
  gap: var(--faq-gap);
  align-items: flex-start;
  position: relative;
}

/* ===== 左侧导航 ===== */
.page-faq .faq-sidebar {
  flex: 0 0 var(--faq-sidebar-width);
  position: sticky;
  top: 80px;
  z-index: 5;
}
.page-faq .faq-sidebar-inner {
  background: rgba(13, 13, 13, 0.75);
  backdrop-filter: blur(8px);
  border: 1px solid var(--faq-border-color);
  border-radius: var(--border-radius);
  padding: 1.25rem 1rem;
}
.page-faq .faq-sidebar-heading {
  font-size: 1rem;
  font-weight: 600;
  color: var(--clr-white);
  margin: 0 0 1rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--faq-border-color);
  letter-spacing: 0.02em;
  font-family: var(--font-head);
}
.page-faq .faq-nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
.page-faq .faq-nav-link {
  display: block;
  padding: 0.6rem 0.8rem;
  font-size: 0.9rem;
  color: var(--clr-light-gray);
  text-decoration: none;
  border-radius: 4px;
  transition: background var(--faq-transition), color var(--faq-transition), padding-left var(--faq-transition);
  border-left: 3px solid transparent;
}
.page-faq .faq-nav-link:hover,
.page-faq .faq-nav-link:focus-visible {
  background: var(--faq-active-bg);
  color: var(--clr-white);
  padding-left: 1.1rem;
  border-left-color: var(--clr-electric-purple);
}
.page-faq .faq-nav-link:focus-visible {
  outline: 2px solid var(--clr-cyber-green);
  outline-offset: 2px;
}

/* ===== 右侧主内容 ===== */
.page-faq .faq-main {
  flex: 1;
  min-width: 0;
}

/* Hero 区域 */
.page-faq .faq-hero {
  display: flex;
  gap: 1.5rem;
  align-items: center;
  background: linear-gradient(135deg, rgba(10, 31, 61, 0.85), rgba(138, 43, 226, 0.18));
  border: 1px solid var(--faq-border-color);
  border-radius: calc(var(--border-radius) * 1.5);
  padding: 1.5rem 1.8rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}
.page-faq .faq-hero-text {
  flex: 1;
  min-width: 220px;
}
.page-faq .faq-hero-title {
  font-size: 1.8rem;
  font-weight: 700;
  font-family: var(--font-head);
  color: var(--clr-white);
  margin: 0 0 0.4rem;
  line-height: 1.2;
  letter-spacing: -0.01em;
}
.page-faq .faq-hero-desc {
  font-size: 0.95rem;
  color: var(--clr-mid-gray);
  margin: 0 0 1.2rem;
  max-width: 460px;
  line-height: 1.5;
}
.page-faq .faq-hero-visual {
  flex: 0 0 auto;
  max-width: 320px;
}
.page-faq .faq-hero-img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--border-radius);
  object-fit: cover;
  border: 1px solid rgba(255, 122, 0, 0.25);
}

/* 搜索框 */
.page-faq .faq-search-box {
  position: relative;
  max-width: 420px;
}
.page-faq .faq-search-input {
  width: 100%;
  padding: 0.7rem 1rem 0.7rem 2.6rem;
  font-size: 0.95rem;
  font-family: var(--font-sans);
  color: var(--clr-white);
  background: rgba(13, 13, 13, 0.7);
  border: 1px solid var(--faq-border-color);
  border-radius: 50px;
  outline: none;
  transition: border-color var(--faq-transition), box-shadow var(--faq-transition);
}
.page-faq .faq-search-input::placeholder {
  color: var(--clr-mid-gray);
  opacity: 0.7;
}
.page-faq .faq-search-input:focus {
  border-color: var(--clr-cyber-green);
  box-shadow: 0 0 0 3px rgba(0, 255, 135, 0.15);
}
.page-faq .faq-search-icon {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.2rem;
  color: var(--clr-mid-gray);
  pointer-events: none;
  line-height: 1;
}

/* ===== 分类内容 ===== */
.page-faq .faq-sections {
  display: flex;
  flex-direction: column;
  gap: 2.2rem;
}
.page-faq .faq-section {
  scroll-margin-top: 90px;
}
.page-faq .faq-section-title {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.35rem;
  font-weight: 600;
  font-family: var(--font-head);
  color: var(--clr-white);
  margin: 0 0 1rem;
  padding-bottom: 0.6rem;
  border-bottom: 2px solid var(--clr-bright-orange);
  letter-spacing: 0.01em;
}
.page-faq .faq-section-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
  border: 1px solid rgba(138, 43, 226, 0.3);
  background: rgba(13, 13, 13, 0.5);
}

/* 手风琴列表 */
.page-faq .faq-list {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

/* details/summary 手风琴 */
.page-faq .faq-item {
  background: rgba(13, 13, 13, 0.55);
  border: 1px solid var(--faq-border-color);
  border-radius: var(--border-radius);
  transition: border-color var(--faq-transition), box-shadow var(--faq-transition);
  overflow: hidden;
}
.page-faq .faq-item[open] {
  border-color: rgba(255, 122, 0, 0.4);
  box-shadow: var(--faq-hover-shadow);
}
.page-faq .faq-item:hover {
  border-color: rgba(138, 43, 226, 0.55);
}

.page-faq .faq-question {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.9rem 1.1rem;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--clr-light-gray);
  cursor: pointer;
  list-style: none;
  transition: background var(--faq-transition), color var(--faq-transition);
  user-select: none;
  position: relative;
}
.page-faq .faq-question::-webkit-details-marker {
  display: none;
}
.page-faq .faq-question::marker {
  display: none;
  content: '';
}
.page-faq .faq-question::after {
  content: '+';
  margin-left: auto;
  font-size: 1.3rem;
  font-weight: 300;
  color: var(--clr-bright-orange);
  transition: transform var(--faq-transition);
  flex-shrink: 0;
  line-height: 1;
}
.page-faq .faq-item[open] > .faq-question::after {
  content: '−';
  transform: rotate(180deg);
}
.page-faq .faq-question:hover,
.page-faq .faq-item[open] > .faq-question {
  background: var(--faq-active-bg);
  color: var(--clr-white);
}
.page-faq .faq-question:focus-visible {
  outline: 2px solid var(--clr-cyber-green);
  outline-offset: -2px;
}

.page-faq .faq-answer {
  padding: 0 1.1rem 1rem;
  font-size: 0.9rem;
  color: var(--clr-mid-gray);
  line-height: 1.6;
  border-top: 1px solid rgba(138, 43, 226, 0.15);
  margin-top: 0;
  animation: faqFadeIn 0.3s ease;
}
.page-faq .faq-answer p {
  margin: 0.6rem 0 0;
}
.page-faq .faq-answer a {
  color: var(--clr-bright-orange);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: opacity var(--faq-transition);
}
.page-faq .faq-answer a:hover {
  opacity: 0.8;
}
.page-faq .faq-answer strong {
  color: var(--clr-light-gray);
  font-weight: 600;
}

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

/* 反馈按钮 */
.page-faq .faq-feedback {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-top: 0.8rem;
  padding-top: 0.6rem;
  border-top: 1px solid rgba(136, 136, 136, 0.2);
  flex-wrap: wrap;
}
.page-faq .faq-feedback-label {
  font-size: 0.8rem;
  color: var(--clr-mid-gray);
  margin-right: 0.2rem;
}
.page-faq .faq-feedback-btn {
  padding: 0.3rem 0.9rem;
  font-size: 0.8rem;
  font-family: var(--font-sans);
  color: var(--clr-light-gray);
  background: rgba(13, 13, 13, 0.6);
  border: 1px solid var(--faq-border-color);
  border-radius: 20px;
  cursor: pointer;
  transition: background var(--faq-transition), border-color var(--faq-transition), transform 0.15s;
}
.page-faq .faq-feedback-btn:hover {
  background: var(--clr-electric-purple);
  border-color: var(--clr-electric-purple);
  color: var(--clr-white);
  transform: scale(1.03);
}
.page-faq .faq-feedback-btn:focus-visible {
  outline: 2px solid var(--clr-cyber-green);
  outline-offset: 2px;
}

/* 底部引导 */
.page-faq .faq-cta {
  margin-top: 2.5rem;
  padding: 1.2rem 1.5rem;
  background: rgba(13, 13, 13, 0.5);
  border: 1px solid var(--faq-border-color);
  border-radius: var(--border-radius);
  text-align: center;
}
.page-faq .faq-cta p {
  margin: 0.3rem 0;
  font-size: 0.9rem;
  color: var(--clr-mid-gray);
}
.page-faq .faq-cta-link {
  color: var(--clr-bright-orange);
  font-weight: 500;
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: opacity var(--faq-transition);
}
.page-faq .faq-cta-link:hover {
  opacity: 0.8;
}

/* ===== 移动端优先：窄屏适配 ===== */
@media (max-width: 767px) {
  .page-faq {
    padding: 0.75rem 0.75rem 2rem;
  }
  .page-faq .breadcrumb {
    font-size: 0.8rem;
    margin-bottom: 1rem;
  }
  /* 左侧导航转水平标签 */
  .page-faq .faq-sidebar {
    position: relative;
    top: auto;
    flex: none;
    width: 100%;
    margin-bottom: 1rem;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }
  .page-faq .faq-sidebar::-webkit-scrollbar {
    display: none;
  }
  .page-faq .faq-sidebar-inner {
    padding: 0.6rem 0.8rem;
    display: flex;
    flex-wrap: nowrap;
    align-items: center;
    gap: 0.5rem;
  }
  .page-faq .faq-sidebar-heading {
    font-size: 0.85rem;
    margin: 0 0.4rem 0 0;
    padding: 0;
    border: none;
    white-space: nowrap;
    flex-shrink: 0;
  }
  .page-faq .faq-nav-list {
    flex-direction: row;
    gap: 0.3rem;
    flex-wrap: nowrap;
  }
  .page-faq .faq-nav-link {
    padding: 0.4rem 0.8rem;
    font-size: 0.8rem;
    white-space: nowrap;
    border-left: none;
    border-bottom: 2px solid transparent;
    border-radius: 4px;
  }
  .page-faq .faq-nav-link:hover,
  .page-faq .faq-nav-link:focus-visible {
    padding-left: 0.8rem;
    border-bottom-color: var(--clr-electric-purple);
    border-left-color: transparent;
  }

  /* 主内容区 */
  .page-faq .faq-main {
    width: 100%;
  }

  /* Hero 紧凑 */
  .page-faq .faq-hero {
    padding: 1rem;
    flex-direction: column;
    align-items: stretch;
    gap: 1rem;
  }
  .page-faq .faq-hero-title {
    font-size: 1.4rem;
  }
  .page-faq .faq-hero-desc {
    font-size: 0.85rem;
  }
  .page-faq .faq-hero-visual {
    max-width: 100%;
  }
  .page-faq .faq-hero-img {
    width: 100%;
    height: auto;
    max-height: 180px;
    object-fit: cover;
  }

  /* 搜索框 */
  .page-faq .faq-search-box {
    max-width: 100%;
  }
  .page-faq .faq-search-input {
    padding: 0.6rem 1rem 0.6rem 2.4rem;
    font-size: 0.9rem;
  }

  /* 分类标题 */
  .page-faq .faq-section-title {
    font-size: 1.15rem;
  }
  .page-faq .faq-section-icon {
    width: 32px;
    height: 32px;
  }

  /* 手风琴 */
  .page-faq .faq-question {
    padding: 0.75rem 0.9rem;
    font-size: 0.88rem;
  }
  .page-faq .faq-answer {
    padding: 0 0.9rem 0.8rem;
    font-size: 0.85rem;
  }

  /* 反馈 */
  .page-faq .faq-feedback {
    gap: 0.4rem;
  }
  .page-faq .faq-feedback-btn {
    padding: 0.25rem 0.7rem;
    font-size: 0.75rem;
  }

  /* CTA */
  .page-faq .faq-cta {
    padding: 0.9rem 1rem;
    margin-top: 1.8rem;
  }
  .page-faq .faq-cta p {
    font-size: 0.85rem;
  }
}

/* ===== 桌面增强 ===== */
@media (min-width: 768px) {
  .page-faq {
    padding: 1.5rem 2rem 3rem;
  }
  .page-faq .faq-layout {
    gap: 2rem;
  }
  .page-faq .faq-sidebar {
    flex: 0 0 var(--faq-sidebar-width);
  }
  .page-faq .faq-hero {
    padding: 1.8rem 2.2rem;
  }
  .page-faq .faq-hero-title {
    font-size: 2rem;
  }
  .page-faq .faq-section-title {
    font-size: 1.5rem;
  }
}

/* 宽屏微调 */
@media (min-width: 1200px) {
  .page-faq .faq-sidebar {
    flex-basis: 260px;
  }
  .page-faq .faq-hero {
    padding: 2rem 2.5rem;
  }
  .page-faq .faq-hero-title {
    font-size: 2.2rem;
  }
}