.page-faq {
  --faq-index-w: 280px;
  --faq-gap: 48px;
  background: var(--bw-bg-soft);
  overflow-x: hidden;
}

/* ===== Hero ===== */
.page-faq .faq-hero {
  position: relative;
  background: var(--bw-primary-dark);
  color: var(--bw-white);
  padding: 48px 0 64px;
  min-height: 420px;
  border-bottom: 3px solid var(--bw-accent);
  overflow: hidden;
  isolation: isolate;
}

.page-faq .faq-hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}

.page-faq .faq-hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center right;
  opacity: 0.32;
  transform: scale(1.03);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(90deg, rgba(6, 18, 43, 0.96) 0%, rgba(10, 31, 68, 0.84) 45%, rgba(6, 18, 43, 0.56) 100%);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  right: 9%;
  top: -24%;
  width: 2px;
  height: 150%;
  z-index: 2;
  background: linear-gradient(180deg, transparent, var(--bw-accent) 35%, var(--bw-accent) 65%, transparent);
  opacity: 0.6;
}

.page-faq .faq-hero-inner {
  position: relative;
  z-index: 3;
  padding-top: 16px;
}

.page-faq .faq-hero .breadcrumb-item a {
  color: rgba(255, 255, 255, 0.72);
}

.page-faq .faq-hero .breadcrumb-item + .breadcrumb-item::before {
  color: rgba(255, 255, 255, 0.4);
}

.page-faq .faq-hero .breadcrumb-current {
  color: var(--bw-accent);
}

.page-faq .faq-hero .index-label {
  background: rgba(255, 107, 53, 0.14);
  color: var(--bw-accent);
  border: 1px solid rgba(255, 107, 53, 0.35);
}

.page-faq .faq-hero-head {
  max-width: 760px;
  margin-top: 32px;
}

.page-faq .faq-hero-title {
  font-family: var(--bw-font-display);
  font-size: clamp(44px, 7vw, 76px);
  line-height: 1;
  font-weight: 900;
  letter-spacing: 0.01em;
  margin: 16px 0 20px;
  text-transform: uppercase;
}

.page-faq .faq-hero-title-sub {
  display: block;
  font-size: clamp(20px, 3vw, 34px);
  line-height: 1.15;
  color: var(--bw-accent);
  letter-spacing: 0.03em;
  text-transform: none;
}

.page-faq .faq-hero-desc {
  max-width: 620px;
  margin: 0;
  font-size: 16px;
  line-height: 1.75;
  color: rgba(231, 236, 243, 0.85);
}

/* ===== Toolbar / 快速检索 ===== */
.page-faq .faq-toolbar {
  position: relative;
  z-index: 5;
  background: var(--bw-white);
  border-bottom: 1px solid var(--bw-line);
  padding: 22px 0;
}

.page-faq .faq-toolbar-inner {
  display: grid;
  gap: 10px;
}

.page-faq .faq-search-box {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px 14px;
  border: 1px solid var(--bw-line);
  background: var(--bw-bg-soft);
  padding: 14px 18px;
  border-radius: var(--bw-radius);
}

.page-faq .faq-search-icon {
  flex-shrink: 0;
  color: var(--bw-primary);
}

.page-faq .faq-search-label {
  font-family: var(--bw-font-mono);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--bw-primary);
  font-weight: 700;
}

.page-faq .faq-search-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .faq-search-tag {
  display: inline-block;
  padding: 6px 14px;
  border: 1px solid var(--bw-line);
  border-radius: 999px;
  background: var(--bw-white);
  color: var(--bw-primary);
  font-size: 13px;
  text-decoration: none;
  transition: background 0.2s var(--bw-ease), color 0.2s var(--bw-ease), border-color 0.2s var(--bw-ease);
}

.page-faq .faq-search-tag:hover {
  background: var(--bw-accent);
  border-color: var(--bw-accent);
  color: var(--bw-white);
}

.page-faq .faq-toolbar-tip {
  margin: 0;
  font-size: 13px;
  color: #5b6b8a;
  font-family: var(--bw-font-mono);
}

.page-faq .faq-toolbar-tip a {
  color: var(--bw-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ===== 主体非对称布局 ===== */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
  gap: var(--faq-gap);
  align-items: start;
  padding-top: 48px;
  padding-bottom: 48px;
}

/* 左侧分类索引 */
.page-faq .faq-index {
  position: sticky;
  top: 100px;
  background: var(--bw-primary);
  color: var(--bw-white);
  border-radius: var(--bw-radius);
  box-shadow: var(--bw-shadow-soft);
  overflow: hidden;
}

.page-faq .faq-index-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 22px 20px 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}

.page-faq .faq-index-code {
  font-family: var(--bw-font-mono);
  font-size: 24px;
  font-weight: 700;
  color: var(--bw-accent);
}

.page-faq .faq-index-label-text {
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--bw-silver);
}

.page-faq .faq-index-nav {
  display: grid;
}

.page-faq .faq-index-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 15px 20px;
  border-top: 1px solid rgba(192, 192, 192, 0.14);
  color: #e7ecf3;
  text-decoration: none;
  font-size: 15px;
  transition: background 0.2s var(--bw-ease), padding-left 0.2s var(--bw-ease);
}

.page-faq .faq-index-link:hover {
  background: var(--bw-primary-light);
  padding-left: 24px;
}

.page-faq .faq-index-link.is-active {
  background: rgba(255, 107, 53, 0.12);
  border-left: 3px solid var(--bw-accent);
  padding-left: 17px;
  color: var(--bw-accent);
}

.page-faq .faq-index-num {
  font-family: var(--bw-font-mono);
  font-size: 13px;
  color: var(--bw-accent);
}

.page-faq .faq-index-arrow {
  margin-left: auto;
  color: var(--bw-silver);
  font-family: var(--bw-font-mono);
  transition: transform 0.2s var(--bw-ease);
}

.page-faq .faq-index-link:hover .faq-index-arrow {
  transform: translateX(4px);
}

.page-faq .faq-index-meta {
  padding: 18px 20px;
  background: rgba(255, 255, 255, 0.05);
  border-top: 1px solid rgba(192, 192, 192, 0.18);
}

.page-faq .faq-index-meta-line {
  display: block;
  width: 32px;
  height: 3px;
  background: var(--bw-accent);
  margin-bottom: 12px;
}

.page-faq .faq-index-meta-text {
  margin: 0;
  font-size: 12px;
  line-height: 1.8;
  color: var(--bw-silver);
  font-family: var(--bw-font-mono);
}

/* 右侧 FAQ 内容 */
.page-faq .faq-main {
  min-width: 0;
  position: relative;
}

.page-faq .faq-group {
  scroll-margin-top: 120px;
  margin-bottom: 40px;
  padding-bottom: 40px;
  border-bottom: 1px dashed var(--bw-line);
}

.page-faq .faq-group:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.page-faq .faq-group-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.page-faq .faq-group-num {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bw-accent);
  color: var(--bw-white);
  font-family: var(--bw-font-mono);
  font-size: 14px;
  font-weight: 700;
  box-shadow: 0 0 0 4px rgba(255, 107, 53, 0.15);
  flex-shrink: 0;
}

.page-faq .faq-group-title {
  margin: 0;
  font-family: var(--bw-font-display);
  font-size: 30px;
  line-height: 1.1;
  color: var(--bw-primary);
  letter-spacing: 0.01em;
}

/* FAQ 折叠项 */
.page-faq .faq-list {
  display: grid;
  gap: 12px;
}

.page-faq .faq-item {
  background: var(--bw-white);
  border: 1px solid var(--bw-line);
  border-left: 3px solid var(--bw-primary);
  border-radius: var(--bw-radius);
  transition: box-shadow 0.25s var(--bw-ease), border-color 0.25s var(--bw-ease);
  overflow: hidden;
}

.page-faq .faq-item[open] {
  box-shadow: var(--bw-shadow-soft);
  border-left-color: var(--bw-accent);
}

.page-faq .faq-question {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 16px;
  cursor: pointer;
  user-select: none;
  font-weight: 600;
  color: var(--bw-primary);
}

.page-faq .faq-question::-webkit-details-marker {
  display: none;
}

.page-faq .faq-q-icon {
  flex-shrink: 0;
  font-family: var(--bw-font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--bw-accent);
  border: 1px solid rgba(255, 107, 53, 0.4);
  border-radius: 3px;
  padding: 3px 6px;
}

.page-faq .faq-q-text {
  flex: 1;
  font-size: 16px;
  line-height: 1.4;
}

.page-faq .faq-toggle {
  flex-shrink: 0;
  position: relative;
  width: 20px;
  height: 20px;
  border: 1px solid var(--bw-silver);
  border-radius: 50%;
  transition: background 0.25s var(--bw-ease), border-color 0.25s var(--bw-ease);
}

.page-faq .faq-toggle::before,
.page-faq .faq-toggle::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 9px;
  height: 1.5px;
  background: var(--bw-primary);
  transform: translate(-50%, -50%);
  transition: transform 0.25s var(--bw-ease);
}

.page-faq .faq-toggle::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.page-faq .faq-item[open] .faq-toggle {
  border-color: var(--bw-accent);
  background: var(--bw-accent);
}

.page-faq .faq-item[open] .faq-toggle::before,
.page-faq .faq-item[open] .faq-toggle::after {
  background: var(--bw-white);
}

.page-faq .faq-item[open] .faq-toggle::after {
  transform: translate(-50%, -50%) rotate(0deg);
}

.page-faq .faq-answer {
  padding: 0 18px 20px 42px;
  color: var(--bw-text);
  font-size: 15px;
  line-height: 1.75;
}

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

.page-faq .faq-item[open] .faq-answer {
  animation: faqAnswerIn 0.3s var(--bw-ease);
}

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

/* 下载区域配图 */
.page-faq .faq-download-wrap {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: 20px;
  align-items: start;
}

.page-faq .faq-download-figure {
  margin: 0;
  border: 1px solid var(--bw-line);
  background: var(--bw-white);
  padding: 6px;
  border-radius: var(--bw-radius);
  box-shadow: var(--bw-shadow-soft);
}

.page-faq .faq-download-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: 2px;
}

.page-faq .faq-download-figure figcaption {
  font-size: 12px;
  color: #5b6b8a;
  text-align: center;
  padding: 8px 0 4px;
  font-family: var(--bw-font-mono);
}

/* 底部联系 CTA */
.page-faq .faq-contact {
  background: var(--bw-primary-dark);
  color: var(--bw-white);
  border-top: 3px solid var(--bw-accent);
  padding: 56px 0 64px;
  position: relative;
  overflow: hidden;
}

.page-faq .faq-contact::before {
  content: "";
  position: absolute;
  right: -80px;
  top: -40px;
  width: 300px;
  height: 300px;
  border: 1px solid rgba(255, 107, 53, 0.25);
  border-radius: 50%;
}

.page-faq .faq-contact::after {
  content: "FAQ";
  position: absolute;
  right: 30px;
  bottom: -30px;
  font-family: var(--bw-font-display);
  font-size: 160px;
  line-height: 1;
  color: rgba(255, 255, 255, 0.04);
  pointer-events: none;
}

.page-faq .faq-contact-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 32px;
  align-items: center;
}

.page-faq .faq-contact .index-label {
  background: rgba(255, 107, 53, 0.15);
  color: var(--bw-accent);
  border: 1px solid rgba(255, 107, 53, 0.4);
}

.page-faq .faq-contact-title {
  margin: 12px 0 12px;
  font-family: var(--bw-font-display);
  font-size: 38px;
  line-height: 1.08;
  letter-spacing: 0.01em;
}

.page-faq .faq-contact-desc {
  max-width: 560px;
  margin: 0;
  color: rgba(231, 236, 243, 0.8);
  line-height: 1.7;
}

.page-faq .faq-contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ===== 响应式 ===== */
@media (max-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: 1fr;
    gap: 28px;
    padding-top: 28px;
  }

  .page-faq .faq-index {
    position: static;
  }

  .page-faq .faq-index-nav {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-faq .faq-download-wrap {
    grid-template-columns: 1fr;
  }

  .page-faq .faq-contact-inner {
    grid-template-columns: 1fr;
  }

  .page-faq .faq-contact::after {
    font-size: 120px;
  }
}

@media (max-width: 640px) {
  .page-faq .faq-hero {
    padding: 32px 0 40px;
    min-height: 360px;
  }

  .page-faq .faq-hero-head {
    margin-top: 20px;
  }

  .page-faq .faq-index-nav {
    grid-template-columns: 1fr;
  }

  .page-faq .faq-group-title {
    font-size: 24px;
  }

  .page-faq .faq-question {
    padding: 16px 12px;
  }

  .page-faq .faq-answer {
    padding: 0 14px 18px 30px;
  }

  .page-faq .faq-search-box {
    align-items: flex-start;
    flex-direction: column;
  }

  .page-faq .faq-download-figure img {
    max-height: 220px;
    object-fit: cover;
  }

  .page-faq .faq-contact {
    padding: 44px 0 48px;
  }

  .page-faq .faq-contact-title {
    font-size: 30px;
  }
}

/* ===== 减少动效 ===== */
@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    animation: none !important;
    transition: none !important;
  }

  .page-faq .faq-hero-bg img {
    transform: none;
  }
}