.page-faq {
  --faq-index-width: 260px;
  --faq-gap: 2rem;
  --faq-panel-radius: 6px;
  --faq-index-bg: var(--c-tech-blue);
  --faq-index-text: var(--c-off-white);
  --faq-index-coord: var(--c-gold);
  --faq-index-highlight: var(--c-gold-light);
  --faq-panel-bg: #ffffff;
  --faq-panel-border: var(--c-border);
  --faq-panel-accent: var(--c-primary);
  --faq-hero-bg: var(--c-off-white);
  box-sizing: border-box;
  font-family: var(--font-body);
  color: var(--c-charcoal);
  background-color: var(--c-off-white-dark);
}

.page-faq *,
.page-faq *::before,
.page-faq *::after {
  box-sizing: inherit;
}

/* ========== Hero 标题区 ========== */
.page-faq .faq-hero {
  background-color: var(--faq-hero-bg);
  padding: 2.5rem 1.25rem 2rem;
  border-bottom: 2px solid var(--c-border);
  position: relative;
}

.page-faq .faq-hero::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 10%;
  width: 80%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--c-gold), transparent);
}

.page-faq .faq-breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--c-charcoal);
  margin-bottom: 1rem;
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
}

.page-faq .faq-breadcrumb a {
  color: var(--c-tech-blue);
  text-decoration: none;
  transition: color 0.2s;
}

.page-faq .faq-breadcrumb a:hover {
  color: var(--c-primary);
  text-decoration: underline;
}

.page-faq .faq-breadcrumb__sep {
  color: var(--c-gold);
  font-weight: 700;
}

.page-faq .faq-hero__title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--c-tech-blue);
  margin: 0 0 0.5rem;
  line-height: 1.2;
}

.page-faq .faq-hero__subtitle {
  font-size: 1rem;
  color: var(--c-charcoal);
  margin: 0;
  opacity: 0.8;
  max-width: 680px;
}

/* ========== 主布局 ========== */
.page-faq .faq-layout {
  display: flex;
  flex-direction: column;
  gap: var(--faq-gap);
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--faq-gap) 1.25rem 3rem;
}

/* ========== 索引区（移动端：水平标签条） ========== */
.page-faq .faq-index {
  background-color: var(--faq-index-bg);
  border-radius: var(--faq-panel-radius);
  padding: 1rem 1.25rem;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-panel);
  border: 1px solid rgba(255,255,255,0.08);
}

.page-faq .faq-index__bg {
  display: none;
}

.page-faq .faq-index__header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.page-faq .faq-index__icon {
  color: var(--faq-index-coord);
  font-size: 0.9rem;
  line-height: 1;
}

.page-faq .faq-index__heading {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--faq-index-text);
  margin: 0;
  opacity: 0.9;
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: nowrap;
  gap: 0.5rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--c-gold) rgba(255,255,255,0.15);
  padding-bottom: 0.25rem;
}

.page-faq .faq-index__list::-webkit-scrollbar {
  height: 4px;
}

.page-faq .faq-index__list::-webkit-scrollbar-track {
  background: rgba(255,255,255,0.15);
  border-radius: 2px;
}

.page-faq .faq-index__list::-webkit-scrollbar-thumb {
  background: var(--c-gold);
  border-radius: 2px;
}

.page-faq .faq-index__item {
  flex-shrink: 0;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 0.9rem;
  background-color: rgba(255,255,255,0.06);
  border-radius: 4px;
  text-decoration: none;
  color: var(--faq-index-text);
  font-size: 0.85rem;
  font-family: var(--font-body);
  transition: background-color 0.25s, transform 0.2s;
  white-space: nowrap;
  border: 1px solid transparent;
}

.page-faq .faq-index__link:hover {
  background-color: rgba(255,255,255,0.14);
  transform: translateY(-1px);
  border-color: var(--c-gold);
}

.page-faq .faq-index__link:focus-visible {
  outline: 2px solid var(--c-gold);
  outline-offset: 2px;
}

.page-faq .faq-index__coord {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.8em;
  color: var(--faq-index-coord);
  letter-spacing: 0.02em;
  flex-shrink: 0;
}

.page-faq .faq-index__label {
  font-weight: 500;
  opacity: 0.92;
}

.page-faq .faq-index__legend {
  display: none;
}

/* ========== 答案面板区 ========== */
.page-faq .faq-answers {
  display: flex;
  flex-direction: column;
  gap: var(--faq-gap);
  flex: 1;
  min-width: 0;
}

.page-faq .faq-answer-panel {
  background-color: var(--faq-panel-bg);
  border-radius: var(--faq-panel-radius);
  box-shadow: var(--shadow-card);
  border: 1px solid var(--faq-panel-border);
  position: relative;
  transition: box-shadow 0.3s, border-color 0.3s;
  scroll-margin-top: calc(var(--header-height) + 1rem);
}

.page-faq .faq-answer-panel:target {
  border-color: var(--faq-panel-accent);
  box-shadow: 0 0 0 3px rgba(230,57,70,0.12), var(--shadow-card);
}

.page-faq .faq-answer-panel__inner {
  padding: 1.5rem 1.25rem;
}

.page-faq .faq-answer-panel__heading {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.15rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--c-tech-blue);
  margin: 0 0 1rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  line-height: 1.3;
}

.page-faq .faq-answer-panel__heading .index-tag {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.7rem;
  color: var(--c-gold);
  background-color: var(--c-tech-blue);
  padding: 0.2rem 0.5rem;
  border-radius: 3px;
  letter-spacing: 0.04em;
  flex-shrink: 0;
  line-height: 1.4;
}

.page-faq .faq-answer-panel__content {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--c-charcoal);
}

.page-faq .faq-answer-panel__content p {
  margin: 0 0 0.75rem;
}

.page-faq .faq-answer-panel__content p:last-child {
  margin-bottom: 0;
}

.page-faq .faq-answer-panel__content a {
  color: var(--c-tech-blue);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color 0.2s;
}

.page-faq .faq-answer-panel__content a:hover {
  color: var(--c-primary);
}

.page-faq .faq-answer-panel__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px dashed var(--c-border);
}

.page-faq .faq-answer-panel__actions .btn {
  font-size: 0.82rem;
  padding: 0.45rem 1rem;
  border-radius: 4px;
  font-weight: 600;
  font-family: var(--font-heading);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  transition: background-color 0.25s, color 0.25s, border-color 0.25s;
  border: 1.5px solid transparent;
  cursor: default;
}

.page-faq .faq-answer-panel__actions .btn--primary {
  background-color: var(--c-primary);
  color: #ffffff;
  border-color: var(--c-primary);
}

.page-faq .faq-answer-panel__actions .btn--primary:hover {
  background-color: var(--c-primary-hover);
  border-color: var(--c-primary-hover);
}

.page-faq .faq-answer-panel__actions .btn--ghost {
  background-color: transparent;
  color: var(--c-tech-blue);
  border-color: var(--c-tech-blue);
}

.page-faq .faq-answer-panel__actions .btn--ghost:hover {
  background-color: var(--c-tech-blue);
  color: #ffffff;
}

/* 底部纹理（仅最后一个面板） */
.page-faq .faq-answer-panel__texture {
  display: none;
}

.page-faq .faq-answer-panel:last-child .faq-answer-panel__texture {
  display: block;
  width: 100%;
  overflow: hidden;
  border-radius: 0 0 var(--faq-panel-radius) var(--faq-panel-radius);
  line-height: 0;
}

.page-faq .faq-answer-panel__texture-img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  opacity: 0.35;
}

/* ========== 面板间装饰分隔线 ========== */
.page-faq .faq-answers > .faq-answer-panel:not(:last-child)::after {
  content: '';
  position: absolute;
  bottom: calc(-1 * var(--faq-gap) / 2);
  left: 20%;
  width: 60%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--c-gold), transparent);
  opacity: 0.3;
}

/* ========== 桌面端 (>= 768px) ========== */
@media (min-width: 768px) {
  .page-faq .faq-hero {
    padding: 3rem 2rem 2.5rem;
  }

  .page-faq .faq-hero__title {
    font-size: 2.25rem;
  }

  .page-faq .faq-hero__subtitle {
    font-size: 1.1rem;
  }

  .page-faq .faq-layout {
    flex-direction: row;
    align-items: flex-start;
    padding: 2.5rem 2rem 4rem;
    gap: 2.5rem;
  }

  /* ===== 索引区：垂直固定 ===== */
  .page-faq .faq-index {
    width: var(--faq-index-width);
    flex-shrink: 0;
    position: sticky;
    top: calc(var(--header-height) + 1.5rem);
    align-self: flex-start;
    padding: 1.5rem 1.25rem;
    border-radius: var(--faq-panel-radius);
    background-color: var(--faq-index-bg);
    border: 1px solid rgba(255,255,255,0.08);
  }

  .page-faq .faq-index__bg {
    display: block;
    position: absolute;
    inset: 0;
    pointer-events: none;
    opacity: 0.15;
    overflow: hidden;
    border-radius: var(--faq-panel-radius);
  }

  .page-faq .faq-index__img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    max-width: 100%;
  }

  .page-faq .faq-index__header {
    margin-bottom: 1.25rem;
    position: relative;
    z-index: 1;
  }

  .page-faq .faq-index__heading {
    font-size: 0.8rem;
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    gap: 0.35rem;
    overflow-x: visible;
    padding-bottom: 0;
    position: relative;
    z-index: 1;
  }

  .page-faq .faq-index__link {
    padding: 0.6rem 0.9rem;
    white-space: normal;
    font-size: 0.88rem;
    border-radius: 4px;
    border: 1px solid transparent;
  }

  .page-faq .faq-index__link:hover {
    background-color: rgba(255,255,255,0.14);
    border-color: var(--c-gold);
    transform: translateX(2px);
  }

  .page-faq .faq-index__coord {
    font-size: 0.75rem;
    min-width: 2.4em;
  }

  .page-faq .faq-index__legend {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 1.25rem;
    opacity: 0.3;
    position: relative;
    z-index: 1;
  }

  .page-faq .faq-index__legend-line {
    display: block;
    width: 1.5rem;
    height: 1px;
    background-color: var(--c-gold);
  }

  .page-faq .faq-index__legend-dot {
    display: block;
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background-color: var(--c-gold);
  }

  /* ===== 答案面板 ===== */
  .page-faq .faq-answers {
    flex: 1;
    min-width: 0;
  }

  .page-faq .faq-answer-panel__inner {
    padding: 2rem 2rem 1.75rem;
  }

  .page-faq .faq-answer-panel__heading {
    font-size: 1.3rem;
  }

  .page-faq .faq-answer-panel__heading .index-tag {
    font-size: 0.75rem;
    padding: 0.25rem 0.6rem;
  }

  .page-faq .faq-answer-panel__content {
    font-size: 1rem;
  }

  .page-faq .faq-answer-panel__actions {
    margin-top: 1.5rem;
    padding-top: 1.25rem;
  }

  .page-faq .faq-answer-panel__actions .btn {
    font-size: 0.85rem;
    padding: 0.5rem 1.25rem;
  }

  /* 面板悬停微效 */
  .page-faq .faq-answer-panel:hover {
    border-color: var(--c-gold-light);
    box-shadow: 0 4px 24px rgba(0,0,0,0.06), var(--shadow-card);
  }

  /* 分隔线调整 */
  .page-faq .faq-answers > .faq-answer-panel:not(:last-child)::after {
    left: 30%;
    width: 40%;
  }
}

/* ========== 大屏微调 (>= 1024px) ========== */
@media (min-width: 1024px) {
  .page-faq .faq-layout {
    gap: 3rem;
  }

  .page-faq .faq-index {
    width: 280px;
    padding: 1.75rem 1.5rem;
  }

  .page-faq .faq-answer-panel__inner {
    padding: 2.25rem 2.5rem 2rem;
  }

  .page-faq .faq-answer-panel__heading {
    font-size: 1.4rem;
  }
}

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

/* ========== 打印优化 ========== */
@media print {
  .page-faq .faq-index {
    position: static;
    break-inside: avoid;
  }

  .page-faq .faq-layout {
    display: block;
  }

  .page-faq .faq-answer-panel {
    break-inside: avoid;
    box-shadow: none;
    border: 1px solid #ccc;
  }

  .page-faq .faq-answer-panel__actions .btn {
    border: 1px solid #333;
    color: #333;
    background: transparent;
  }
}