/* ========================================
   页面专属 CSS — 支持中心 (faq)
   作用域：.page-faq
   移动端优先 + 桌面增强
   ======================================== */

/* --- 作用域变量 --- */
.page-faq {
  --faq-bg-section: #1e1e1e;
  --faq-bg-item: #262626;
  --faq-bg-item-hover: #2e2e2e;
  --faq-border: rgba(255, 255, 255, 0.07);
  --faq-border-active: rgba(255, 107, 53, 0.35);
  --faq-dot-size: 8px;
  --faq-nav-width: 220px;
  --faq-section-gap: 2.5rem;
  color: var(--color-light-gray);
  background: var(--color-content-bg);
}

/* --- 面包屑 --- */
.page-faq .breadcrumb {
  padding: 1rem 1.25rem 0;
  font-size: var(--size-xs);
  line-height: 1.6;
}
.page-faq .breadcrumb ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4em 0.6em;
}
.page-faq .breadcrumb li {
  display: inline;
  color: var(--color-metallic-silver);
}
.page-faq .breadcrumb li + li::before {
  content: "∕";
  margin-right: 0.6em;
  color: var(--color-border-medium);
}
.page-faq .breadcrumb a {
  color: var(--color-vibrant-orange);
  text-decoration: none;
  transition: opacity var(--transition-fast);
}
.page-faq .breadcrumb a:hover {
  opacity: 0.75;
}
.page-faq .breadcrumb [aria-current="page"] {
  color: var(--color-white);
  font-weight: 500;
}

/* --- 顶部 Hero --- */
.page-faq .faq-hero {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.25rem 1.5rem;
  padding: 1.5rem 1.25rem 1rem;
  position: relative;
}
.page-faq .faq-hero-icon {
  flex: 0 0 auto;
  width: 72px;
  height: 72px;
  border-radius: 50%;
  overflow: hidden;
  border: 1px solid var(--faq-border);
  background: var(--faq-bg-item);
  display: flex;
  align-items: center;
  justify-content: center;
}
.page-faq .faq-hero-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  opacity: 0.85;
}
.page-faq .faq-hero-content {
  flex: 1 1 200px;
}
.page-faq .faq-hero-title {
  font-family: var(--font-headings);
  font-size: var(--size-h2);
  font-weight: 700;
  color: var(--color-white);
  margin: 0 0 0.15em;
  line-height: 1.2;
  letter-spacing: -0.01em;
}
.page-faq .faq-hero-desc {
  margin: 0;
  font-size: var(--size-small);
  color: var(--color-metallic-silver);
  line-height: 1.5;
}
.page-faq .faq-search-wrap {
  flex: 1 1 100%;
  position: relative;
  max-width: 480px;
}
.page-faq .faq-search-input {
  display: block;
  width: 100%;
  padding: 0.7rem 1rem 0.7rem 2.6rem;
  font-family: var(--font-body);
  font-size: var(--size-small);
  color: var(--color-white);
  background: var(--faq-bg-item);
  border: 1px solid var(--faq-border);
  border-radius: var(--radius-md);
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  box-sizing: border-box;
}
.page-faq .faq-search-input::placeholder {
  color: var(--color-metallic-silver);
  opacity: 0.7;
}
.page-faq .faq-search-input:focus {
  border-color: var(--color-vibrant-orange);
  box-shadow: 0 0 0 2px rgba(255, 107, 53, 0.15);
}
.page-faq .faq-search-icon {
  position: absolute;
  left: 0.85rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-metallic-silver);
  pointer-events: none;
  display: flex;
  align-items: center;
}

/* --- 主布局：导航 + 内容 --- */
.page-faq .faq-layout {
  display: flex;
  flex-direction: column;
  gap: 0;
  padding: 0 1.25rem 2.5rem;
}

/* --- 左侧导航 (移动端：水平标签) --- */
.page-faq .faq-nav {
  flex: 0 0 auto;
  margin-bottom: 1.5rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--faq-border) transparent;
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--color-content-bg);
  padding: 0.25rem 0 0.5rem;
}
.page-faq .faq-nav::-webkit-scrollbar {
  height: 3px;
}
.page-faq .faq-nav::-webkit-scrollbar-thumb {
  background: var(--faq-border);
  border-radius: 4px;
}
.page-faq .faq-nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: nowrap;
  gap: 0.25rem;
  min-width: max-content;
}
.page-faq .faq-nav-item {
  flex: 0 0 auto;
}
.page-faq .faq-nav-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem 0.5rem 0.75rem;
  font-size: var(--size-xs);
  font-weight: 500;
  color: var(--color-metallic-silver);
  text-decoration: none;
  border: 1px solid var(--faq-border);
  border-radius: var(--radius-sm);
  background: transparent;
  transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
  white-space: nowrap;
}
.page-faq .faq-nav-link:hover,
.page-faq .faq-nav-link:focus-visible {
  color: var(--color-white);
  background: var(--faq-bg-item);
  border-color: var(--color-vibrant-orange);
}
.page-faq .faq-nav-dot {
  display: inline-block;
  width: var(--faq-dot-size);
  height: var(--faq-dot-size);
  border-radius: 50%;
  background: var(--color-vibrant-orange);
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}
.page-faq .faq-nav-link:hover .faq-nav-dot {
  transform: scale(1.3);
}

/* --- 右侧内容 --- */
.page-faq .faq-content {
  flex: 1 1 auto;
  min-width: 0;
}

/* --- 每个问题区块 --- */
.page-faq .faq-section {
  margin-bottom: var(--faq-section-gap);
  position: relative;
}
.page-faq .faq-section-title {
  font-family: var(--font-headings);
  font-size: var(--size-h3);
  font-weight: 700;
  color: var(--color-white);
  margin: 0 0 0.15em;
  line-height: 1.3;
  letter-spacing: -0.01em;
}
.page-faq .faq-section-intro {
  font-size: var(--size-small);
  color: var(--color-metallic-silver);
  margin: 0 0 1.25rem;
  line-height: 1.5;
}

/* --- 斜切分隔线 --- */
.page-faq .faq-section-divider {
  height: 1px;
  margin-top: var(--faq-section-gap);
  background: linear-gradient(135deg, var(--color-neon-blue), var(--color-neon-green), transparent 70%);
  clip-path: polygon(0 0, 100% 0, 98% 100%, 0% 100%);
  opacity: 0.5;
}

/* --- 手风琴单项 --- */
.page-faq .faq-item {
  display: block;
  margin-bottom: 0.5rem;
  border: 1px solid var(--faq-border);
  border-radius: var(--radius-sm);
  background: var(--faq-bg-item);
  transition: background var(--transition-fast), border-color var(--transition-fast);
  overflow: hidden;
}
.page-faq .faq-item:hover {
  background: var(--faq-bg-item-hover);
}
.page-faq .faq-item[open] {
  border-color: var(--faq-border-active);
  background: var(--faq-bg-item-hover);
}

/* --- 问题标题 (summary) --- */
.page-faq .faq-question {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 1rem;
  cursor: pointer;
  list-style: none;
  user-select: none;
  transition: background var(--transition-fast);
}
.page-faq .faq-question::-webkit-details-marker {
  display: none;
}
.page-faq .faq-question:focus-visible {
  outline: 2px solid var(--color-vibrant-orange);
  outline-offset: -2px;
  border-radius: var(--radius-sm);
}
.page-faq .faq-dot {
  display: inline-block;
  width: var(--faq-dot-size);
  height: var(--faq-dot-size);
  border-radius: 50%;
  background: var(--color-neon-blue);
  flex-shrink: 0;
  transition: background var(--transition-fast), transform var(--transition-fast);
}
.page-faq .faq-item[open] .faq-dot {
  background: var(--color-neon-green);
  transform: scale(1.2);
}
.page-faq .faq-question-text {
  flex: 1 1 auto;
  font-family: var(--font-body);
  font-size: var(--size-small);
  font-weight: 600;
  color: var(--color-white);
  line-height: 1.4;
}
.page-faq .faq-indicator {
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  position: relative;
  transition: transform var(--transition-base);
}
.page-faq .faq-indicator::before,
.page-faq .faq-indicator::after {
  content: "";
  position: absolute;
  background: var(--color-metallic-silver);
  border-radius: 1px;
  transition: transform var(--transition-base), background var(--transition-fast);
}
.page-faq .faq-indicator::before {
  width: 2px;
  height: 12px;
  top: 3px;
  left: 8px;
}
.page-faq .faq-indicator::after {
  width: 12px;
  height: 2px;
  top: 8px;
  left: 3px;
}
.page-faq .faq-item[open] .faq-indicator::before {
  transform: rotate(90deg);
  background: var(--color-vibrant-orange);
}
.page-faq .faq-item[open] .faq-indicator::after {
  background: var(--color-vibrant-orange);
}

/* --- 答案面板 --- */
.page-faq .faq-answer {
  padding: 0 1rem 1rem 2.2rem;
  font-size: var(--size-small);
  line-height: 1.7;
  color: var(--color-light-gray);
}
.page-faq .faq-answer p {
  margin: 0 0 0.6em;
}
.page-faq .faq-answer p:last-child {
  margin-bottom: 0;
}
.page-faq .faq-answer strong {
  color: var(--color-white);
  font-weight: 600;
}
.page-faq .faq-answer a {
  color: var(--color-vibrant-orange);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-fast);
}
.page-faq .faq-answer a:hover {
  border-color: var(--color-vibrant-orange);
}
.page-faq .faq-answer-meta {
  margin-top: 0.75rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--faq-border);
  font-size: var(--size-xs);
  color: var(--color-metallic-silver);
}
.page-faq .faq-contact-list {
  list-style: none;
  margin: 0.5rem 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.page-faq .faq-contact-list li {
  font-size: var(--size-small);
  line-height: 1.6;
  color: var(--color-light-gray);
}
.page-faq .faq-contact-list a {
  color: var(--color-neon-blue);
  text-decoration: none;
}
.page-faq .faq-contact-list a:hover {
  text-decoration: underline;
}
.page-faq .faq-answer-note {
  font-size: var(--size-xs);
  color: var(--color-metallic-silver);
  font-style: italic;
  margin-top: 0.25rem;
}
.page-faq .faq-step-img {
  margin: 0.75rem 0 0.25rem;
  max-width: 280px;
  border: 1px solid var(--faq-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.page-faq .faq-step-img img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: contain;
}

/* --- data-reveal 支持 (渐进增强) --- */
.page-faq [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.45s ease, transform 0.45s ease;
}
.page-faq [data-reveal-visible] {
  opacity: 1;
  transform: translateY(0);
}

/* ========================================
   桌面 ≥ 768px
   ======================================== */
@media (min-width: 768px) {
  .page-faq .breadcrumb {
    padding: 1.25rem 2rem 0;
  }
  .page-faq .faq-hero {
    flex-wrap: nowrap;
    padding: 2rem 2rem 1.25rem;
  }
  .page-faq .faq-hero-icon {
    width: 88px;
    height: 88px;
  }
  .page-faq .faq-hero-title {
    font-size: var(--size-h1);
  }
  .page-faq .faq-hero-desc {
    font-size: var(--size-body);
  }
  .page-faq .faq-search-wrap {
    flex: 0 0 320px;
    max-width: 360px;
    margin-left: auto;
  }
  .page-faq .faq-layout {
    flex-direction: row;
    padding: 0 2rem 3.5rem;
    gap: 2rem;
  }
  /* 左侧导航：垂直固定 */
  .page-faq .faq-nav {
    flex: 0 0 var(--faq-nav-width);
    max-width: var(--faq-nav-width);
    margin-bottom: 0;
    position: sticky;
    top: 1.25rem;
    align-self: flex-start;
    overflow: visible;
    background: transparent;
    padding: 0.25rem 0;
    max-height: calc(100vh - 3rem);
    overflow-y: auto;
  }
  .page-faq .faq-nav-list {
    flex-direction: column;
    gap: 0.15rem;
    min-width: 0;
  }
  .page-faq .faq-nav-link {
    white-space: normal;
    padding: 0.55rem 0.85rem 0.55rem 0.7rem;
    font-size: var(--size-xs);
    border: 1px solid transparent;
    background: transparent;
  }
  .page-faq .faq-nav-link:hover {
    border-color: var(--faq-border);
  }
  .page-faq .faq-content {
    flex: 1 1 0;
    min-width: 0;
  }
  .page-faq .faq-section-title {
    font-size: var(--size-h2);
  }
  .page-faq .faq-question {
    padding: 0.9rem 1.15rem;
  }
  .page-faq .faq-question-text {
    font-size: var(--size-body);
  }
  .page-faq .faq-answer {
    padding: 0 1.15rem 1.15rem 2.6rem;
    font-size: var(--size-body);
  }
  .page-faq .faq-step-img {
    max-width: 320px;
  }
}

/* ========================================
   大桌面 ≥ 1024px
   ======================================== */
@media (min-width: 1024px) {
  .page-faq .faq-hero {
    padding: 2.5rem 3rem 1.5rem;
  }
  .page-faq .faq-layout {
    padding: 0 3rem 4rem;
    gap: 2.5rem;
  }
  .page-faq .faq-nav {
    flex-basis: 240px;
    max-width: 240px;
  }
  .page-faq .faq-nav-link {
    font-size: var(--size-small);
    padding: 0.6rem 1rem 0.6rem 0.8rem;
  }
  .page-faq .faq-section {
    margin-bottom: 3rem;
  }
  .page-faq .faq-section-divider {
    margin-top: 3rem;
  }
  .page-faq .faq-answer {
    padding-right: 2rem;
  }
}

/* ========================================
   极窄屏安全 (≤ 374px)
   ======================================== */
@media (max-width: 374px) {
  .page-faq .faq-hero {
    flex-direction: column;
    align-items: flex-start;
  }
  .page-faq .faq-hero-icon {
    width: 56px;
    height: 56px;
  }
  .page-faq .faq-search-wrap {
    max-width: 100%;
  }
  .page-faq .faq-nav-link {
    font-size: 0.7rem;
    padding: 0.4rem 0.6rem;
  }
  .page-faq .faq-question {
    padding: 0.7rem 0.75rem;
  }
  .page-faq .faq-answer {
    padding: 0 0.75rem 0.75rem 1.6rem;
  }
}