.page-faq {
  --faq-gap: 1.5rem;
  --faq-radius: 0.75rem;
  --faq-max-width: 840px;
  --faq-bg-card: color-mix(in srgb, var(--color-deep-indigo) 70%, transparent);
  --faq-border-dim: color-mix(in srgb, var(--color-silver) 25%, transparent);
  --faq-highlight-bar: var(--color-neon-green);
  --faq-gold-line: var(--color-dark-gold);

  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  max-width: var(--faq-max-width);
  margin: 0 auto;
  padding: 2rem 1rem 3rem;
  color: var(--color-white);
  font-family: var(--font-body);
  font-size: var(--font-size-body);
  line-height: 1.6;
}

/* 面包屑 */
.faq-breadcrumb {
  align-self: flex-start;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 1.5rem;
  font-size: 0.85rem;
  color: var(--color-silver);
}
.faq-breadcrumb a {
  color: var(--color-silver);
  text-decoration: none;
  transition: color var(--transition-default);
}
.faq-breadcrumb a:hover,
.faq-breadcrumb a:focus-visible {
  color: var(--color-neon-green);
}
.faq-breadcrumb-sep {
  opacity: 0.5;
  user-select: none;
}
.faq-breadcrumb [aria-current="page"] {
  color: var(--color-white);
  font-weight: 500;
}

/* 首屏标题区 */
.faq-hero {
  position: relative;
  width: 100%;
  text-align: center;
  padding: 1.5rem 0 2rem;
  overflow: hidden;
}
.faq-hero::before {
  content: "?";
  position: absolute;
  right: -2rem;
  top: -3rem;
  font-family: var(--font-heading);
  font-size: clamp(8rem, 25vw, 18rem);
  font-weight: 900;
  line-height: 1;
  color: color-mix(in srgb, var(--color-violet) 45%, transparent);
  pointer-events: none;
  user-select: none;
  transform: rotate(12deg);
  z-index: 0;
}
.faq-hero h1 {
  margin: 0 0 0.5rem;
  font-family: var(--font-heading);
  font-size: var(--font-size-heading);
  font-weight: 800;
  font-style: italic;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--color-white) 40%, var(--color-neon-green) 90%);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  position: relative;
  z-index: 1;
}
.faq-hero-desc {
  margin: 0 auto 1.25rem;
  max-width: 640px;
  color: var(--color-silver);
  font-size: 1rem;
  line-height: 1.5;
  position: relative;
  z-index: 1;
}

/* 搜索框 */
.faq-search-wrap {
  position: relative;
  width: 100%;
  max-width: 480px;
  margin: 0 auto;
  z-index: 1;
}
.faq-search-icon {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-silver);
  pointer-events: none;
  display: flex;
  align-items: center;
  justify-content: center;
}
.faq-search-input {
  display: block;
  width: 100%;
  padding: 0.8rem 1rem 0.8rem 3rem;
  background: color-mix(in srgb, var(--color-dark-blue) 80%, transparent);
  border: 1.5px solid var(--faq-border-dim);
  border-radius: var(--faq-radius);
  color: var(--color-white);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: border-color var(--transition-default), box-shadow var(--transition-default);
  outline: none;
  -webkit-appearance: none;
  appearance: none;
}
.faq-search-input::placeholder {
  color: var(--color-silver);
  opacity: 0.7;
}
.faq-search-input:focus {
  border-color: var(--color-neon-green);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-neon-green) 25%, transparent);
}

/* 分类标签 */
.faq-tabs {
  display: flex;
  gap: 0.6rem;
  width: 100%;
  overflow-x: auto;
  padding: 0.25rem 0 1.5rem;
  scrollbar-width: thin;
  scrollbar-color: var(--color-violet) transparent;
  -webkit-overflow-scrolling: touch;
}
.faq-tabs::-webkit-scrollbar {
  height: 4px;
}
.faq-tabs::-webkit-scrollbar-track {
  background: transparent;
}
.faq-tabs::-webkit-scrollbar-thumb {
  background: var(--color-violet);
  border-radius: 4px;
}
.faq-tab {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1.2rem;
  border-radius: 2rem;
  background: linear-gradient(135deg, var(--color-violet), color-mix(in srgb, var(--color-violet) 70%, var(--color-dark-blue)));
  color: var(--color-white);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
  border: 1px solid transparent;
  transition: background var(--transition-default), border-color var(--transition-default), transform var(--transition-default);
  cursor: pointer;
}
.faq-tab:hover,
.faq-tab:focus-visible {
  border-color: var(--color-neon-green);
  transform: translateY(-2px);
}
.faq-tab:active {
  transform: translateY(0);
}

/* 问答内容容器 */
.faq-content {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

/* 每个分类 */
.faq-category {
  background: var(--faq-bg-card);
  border-radius: var(--faq-radius);
  padding: 1.5rem 1.25rem;
  border: 1px solid var(--faq-border-dim);
  transition: border-color var(--transition-default);
}
.faq-category:target {
  border-color: var(--color-neon-green);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-neon-green) 15%, transparent);
}
.faq-category-title {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin: 0 0 0.75rem;
  font-family: var(--font-heading);
  font-size: clamp(1.35rem, 3vw, 1.75rem);
  font-weight: 700;
  font-style: italic;
  color: var(--color-white);
  letter-spacing: -0.01em;
}
.faq-category-icon {
  width: 64px;
  height: 64px;
  border-radius: 0.5rem;
  object-fit: cover;
  flex-shrink: 0;
}

/* 快速跳转索引 */
.faq-index {
  list-style: none;
  margin: 0 0 1rem;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.8rem;
}
.faq-index li {
  margin: 0;
}
.faq-index a {
  color: var(--color-silver);
  font-size: 0.85rem;
  text-decoration: none;
  border-bottom: 1px dotted var(--faq-border-dim);
  transition: color var(--transition-default), border-color var(--transition-default);
}
.faq-index a:hover,
.faq-index a:focus-visible {
  color: var(--color-neon-green);
  border-bottom-color: var(--color-neon-green);
}

/* 手风琴列表 */
.faq-items {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}
.faq-items--with-image {
  gap: 1.25rem;
}

/* 单个问答项 */
.faq-item {
  background: color-mix(in srgb, var(--color-dark-blue) 60%, transparent);
  border-radius: 0.5rem;
  border-left: 3px solid var(--faq-border-dim);
  transition: border-color var(--transition-default), background var(--transition-default);
  overflow: hidden;
}
.faq-item[open] {
  border-left-color: var(--faq-highlight-bar);
  background: color-mix(in srgb, var(--color-dark-blue) 75%, transparent);
}
.faq-item[open] .faq-question {
  color: var(--color-neon-green);
}

/* 问题行 */
.faq-question {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  padding: 1rem 1.25rem;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-white);
  cursor: pointer;
  list-style: none;
  transition: color var(--transition-default);
  user-select: none;
}
.faq-question::-webkit-details-marker {
  display: none;
}
.faq-question::marker {
  display: none;
  content: "";
}
.faq-question .faq-q-marker {
  flex-shrink: 0;
  font-family: var(--font-heading);
  font-weight: 800;
  font-style: italic;
  color: var(--color-gold);
  font-size: 1.1em;
  line-height: 1;
}
.faq-question::after {
  content: "";
  margin-left: auto;
  flex-shrink: 0;
  width: 1.25rem;
  height: 1.25rem;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23B0BEC5' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E") no-repeat center/contain;
  transition: transform var(--transition-default);
}
.faq-item[open] .faq-question::after {
  transform: rotate(180deg);
}

/* 答案区 */
.faq-answer {
  display: flex;
  gap: 0.5rem;
  padding: 0 1.25rem 1rem;
  font-size: 0.95rem;
  color: var(--color-silver);
  line-height: 1.6;
}
.faq-answer .faq-a-marker {
  flex-shrink: 0;
  font-family: var(--font-heading);
  font-weight: 800;
  font-style: italic;
  color: var(--color-neon-green);
  font-size: 1.1em;
  line-height: 1.4;
  opacity: 0.85;
}
.faq-answer p {
  margin: 0;
}
.faq-answer a {
  color: var(--color-neon-green);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--transition-default);
}
.faq-answer a:hover,
.faq-answer a:focus-visible {
  color: var(--color-gold);
}

/* 分类内的图片 */
.faq-category-img {
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: 0.5rem;
  object-fit: cover;
  border: 1px solid var(--faq-border-dim);
  margin-top: 0.5rem;
}

/* 页脚注 */
.faq-footnote {
  margin: 2rem 0 0;
  font-size: 0.85rem;
  color: var(--color-silver);
  text-align: center;
  border-top: 1px solid var(--faq-border-dim);
  padding-top: 1.5rem;
  width: 100%;
}
.faq-footnote a {
  color: var(--color-neon-green);
  text-decoration: underline;
  text-underline-offset: 2px;
}
.faq-footnote a:hover {
  color: var(--color-gold);
}

/* ========== 响应式 ========== */
@media (min-width: 768px) {
  .page-faq {
    padding: 2.5rem 2rem 4rem;
  }
  .faq-category {
    padding: 2rem 2rem 1.75rem;
  }
  .faq-question {
    padding: 1.125rem 1.5rem;
    font-size: 1.05rem;
  }
  .faq-answer {
    padding: 0 1.5rem 1.125rem;
    font-size: 1rem;
  }
  .faq-tabs {
    gap: 0.8rem;
    padding-bottom: 2rem;
  }
  .faq-tab {
    padding: 0.6rem 1.6rem;
    font-size: 1rem;
  }
  .faq-items--with-image {
    display: grid;
    grid-template-columns: 1fr 360px;
    gap: 1.5rem;
    align-items: start;
  }
  .faq-items--with-image .faq-item {
    grid-column: 1;
  }
  .faq-items--with-image .faq-category-img {
    grid-column: 2;
    grid-row: 1 / span 3;
    margin-top: 0;
    width: 100%;
    max-width: 100%;
    height: auto;
  }
  .faq-category-title {
    font-size: clamp(1.5rem, 3vw, 2rem);
  }
  .faq-hero {
    padding: 2.5rem 0 3rem;
  }
}

@media (min-width: 1024px) {
  .page-faq {
    padding: 3rem 2rem 5rem;
  }
  .faq-items--with-image {
    grid-template-columns: 1fr 400px;
  }
  .faq-hero::before {
    right: 0;
    top: -4rem;
  }
}
</style>
</main>