.page-faq {
  --faq-accent: #00E5FF;
  --faq-orange: #FF7A00;
  --faq-deep: #0E274A;
  --faq-carbon: #1A1A1A;
  --faq-text: #F2F7FC;
  --faq-muted: #B8C7D9;
  --faq-border: rgba(0, 229, 255, 0.16);
  --faq-grid-line: rgba(0, 229, 255, 0.08);
}

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

.page-faq .container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 16px;
}

.page-faq .mono-label {
  font-family: "JetBrains Mono", "SFMono-Regular", "Consolas", monospace;
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--faq-muted);
  margin: 0 0 8px;
}

/* 面包屑 */
.page-faq .breadcrumb {
  margin-bottom: 40px;
}

.page-faq .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .breadcrumb li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: "JetBrains Mono", "SFMono-Regular", "Consolas", monospace;
  font-size: 14px;
  color: var(--faq-muted);
}

.page-faq .breadcrumb li + li::before {
  content: "/";
  color: rgba(184, 199, 217, 0.5);
}

.page-faq .breadcrumb a {
  color: var(--faq-accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}

.page-faq .breadcrumb a:hover {
  border-bottom-color: var(--faq-accent);
}

/* Hero */
.page-faq .faq-hero {
  padding: 64px 0 48px;
  border-bottom: 1px solid var(--faq-border);
  position: relative;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__index {
  color: var(--faq-accent);
}

.page-faq .faq-hero h1 {
  font-family: "Archivo Black", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 34px;
  line-height: 1.18;
  letter-spacing: -0.01em;
  margin: 0 0 16px;
  max-width: 720px;
}

.page-faq .faq-hero__lead {
  font-size: 16px;
  line-height: 1.7;
  color: var(--faq-muted);
  margin: 0 0 40px;
  max-width: 640px;
}

.page-faq .faq-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  border-top: 1px solid var(--faq-border);
  padding-top: 24px;
}

.page-faq .faq-stat {
  padding-right: 24px;
}

.page-faq .faq-stat + .faq-stat {
  border-left: 1px solid var(--faq-border);
  padding-left: 24px;
}

.page-faq .faq-stat__num {
  display: block;
  font-family: "Archivo Black", sans-serif;
  font-size: 26px;
  color: var(--faq-accent);
  line-height: 1;
  margin-bottom: 4px;
}

.page-faq .faq-stat__label {
  font-size: 13px;
  color: var(--faq-muted);
}

/* 目录索引条 */
.page-faq .faq-index-wrap {
  border-bottom: 1px solid var(--faq-border);
  background: rgba(14, 39, 74, 0.4);
  position: sticky;
  top: 56px;
  z-index: 20;
  backdrop-filter: blur(8px);
}

.page-faq .faq-index {
  display: flex;
  align-items: center;
  gap: 24px;
  padding-top: 16px;
  padding-bottom: 16px;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-faq .faq-index::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-index .mono-label {
  margin: 0;
  white-space: nowrap;
  color: var(--faq-accent);
}

.page-faq .faq-index ul {
  display: flex;
  gap: 0;
  list-style: none;
  margin: 0;
  padding: 0;
  flex-wrap: nowrap;
}

.page-faq .faq-index li {
  white-space: nowrap;
}

.page-faq .faq-index a {
  display: inline-block;
  padding: 6px 16px;
  font-family: "JetBrains Mono", "SFMono-Regular", "Consolas", monospace;
  font-size: 14px;
  color: var(--faq-muted);
  text-decoration: none;
  border-left: 1px solid var(--faq-border);
  transition: color 0.2s ease, background 0.2s ease;
}

.page-faq .faq-index a:hover {
  color: var(--faq-text);
  background: rgba(0, 229, 255, 0.08);
}

/* 搜索区 */
.page-faq .faq-search-section {
  padding: 48px 16px 0;
  max-width: 820px;
  margin-left: auto;
  margin-right: auto;
}

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

.page-faq .faq-search input {
  width: 100%;
  height: 56px;
  background: var(--faq-deep);
  border: 1px solid var(--faq-border);
  border-radius: 0;
  padding: 0 20px;
  color: var(--faq-text);
  font-family: "Inter", "Helvetica Neue", sans-serif;
  font-size: 16px;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  margin-top: 8px;
}

.page-faq .faq-search input::placeholder {
  color: rgba(184, 199, 217, 0.6);
}

.page-faq .faq-search input:focus {
  border-color: var(--faq-accent);
  box-shadow: 0 0 0 1px var(--faq-accent);
}

.page-faq .faq-search__tip {
  font-size: 13px;
  color: var(--faq-muted);
  margin: 10px 0 0;
}

/* 章节 */
.page-faq .faq-section {
  padding: 64px 16px 0;
}

.page-faq .faq-section__head {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  margin-bottom: 36px;
  border-bottom: 1px solid var(--faq-border);
  padding-bottom: 24px;
}

.page-faq .faq-section__num {
  font-family: "Archivo Black", sans-serif;
  font-size: 20px;
  color: var(--faq-accent);
  line-height: 1;
  padding-top: 2px;
  white-space: nowrap;
}

.page-faq .faq-section__head h2 {
  font-family: "Archivo Black", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 26px;
  margin: 0 0 8px;
  letter-spacing: -0.01em;
}

.page-faq .faq-section__head p {
  margin: 0;
  font-size: 15px;
  color: var(--faq-muted);
  line-height: 1.6;
}

/* 问答列表 */
.page-faq .faq-list {
  border-top: 1px solid var(--faq-border);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--faq-border);
  background: transparent;
  transition: background 0.2s ease;
}

.page-faq .faq-item:hover {
  background: rgba(0, 229, 255, 0.03);
}

.page-faq .faq-item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 24px 16px;
  user-select: none;
  position: relative;
}

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

.page-faq .faq-item__no {
  font-family: "JetBrains Mono", "SFMono-Regular", "Consolas", monospace;
  font-size: 13px;
  color: var(--faq-accent);
  letter-spacing: 0.06em;
  white-space: nowrap;
  min-width: 64px;
}

.page-faq .faq-item__q {
  font-size: 16px;
  font-weight: 600;
  color: var(--faq-text);
  line-height: 1.4;
  flex: 1;
}

.page-faq .faq-item__icon {
  position: relative;
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  border: 1px solid var(--faq-border);
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.page-faq .faq-item__icon::before,
.page-faq .faq-item__icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--faq-accent);
}

.page-faq .faq-item__icon::before {
  width: 10px;
  height: 1px;
}

.page-faq .faq-item__icon::after {
  width: 1px;
  height: 10px;
  transition: opacity 0.2s ease;
}

.page-faq .faq-item[open] summary .faq-item__icon {
  border-color: var(--faq-accent);
}

.page-faq .faq-item[open] summary .faq-item__icon::after {
  opacity: 0;
}

.page-faq .faq-item__a {
  padding: 0 24px 28px 96px;
}

.page-faq .faq-item__a p {
  font-size: 15px;
  line-height: 1.75;
  color: var(--faq-muted);
  margin: 0 0 14px;
}

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

.page-faq .faq-item__a ol,
.page-faq .faq-item__a ul {
  margin: 0 0 14px;
  padding-left: 20px;
}

.page-faq .faq-item__a li {
  font-size: 15px;
  line-height: 1.75;
  color: var(--faq-muted);
}

.page-faq .faq-item__a code {
  font-family: "JetBrains Mono", "SFMono-Regular", "Consolas", monospace;
  font-size: 13px;
  color: var(--faq-accent);
  background: rgba(0, 229, 255, 0.08);
  padding: 2px 6px;
  border: 1px solid var(--faq-border);
}

.page-faq .faq-item[open] {
  background: rgba(14, 39, 74, 0.35);
}

/* 深色变体章节 */
.page-faq .faq-section--deeper {
  border-left: 2px solid var(--faq-accent);
  padding-left: 20px;
  padding-right: 20px;
  margin-left: 16px;
  margin-right: 16px;
  background: var(--faq-deep);
  padding: 64px 24px 56px;
}

.page-faq .faq-section--deeper .faq-item[open] {
  background: rgba(0, 0, 0, 0.2);
}

/* 收藏同步流程图区 */
.page-faq .faq-visual-band {
  padding: 56px 0;
  background: var(--faq-carbon);
  border-top: 1px solid var(--faq-border);
  border-bottom: 1px solid var(--faq-border);
}

.page-faq .faq-visual-band__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: center;
}

.page-faq .faq-visual-band__copy h2 {
  font-family: "Archivo Black", sans-serif;
  font-size: 24px;
  margin: 0 0 12px;
}

.page-faq .faq-visual-band__copy p:not(.mono-label) {
  font-size: 15px;
  line-height: 1.7;
  color: var(--faq-muted);
  margin: 0;
}

.page-faq .faq-visual-band__figure {
  margin: 0;
  background: var(--faq-deep);
  border: 1px solid var(--faq-border);
  position: relative;
}

.page-faq .faq-visual-band__figure::before {
  content: "SYNC FLOW";
  position: absolute;
  top: -10px;
  left: 16px;
  background: var(--faq-carbon);
  padding: 0 8px;
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--faq-accent);
  z-index: 1;
}

.page-faq .faq-visual-band__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 3 / 2;
}

/* 更多帮助 */
.page-faq .faq-more {
  padding: 56px 16px 80px;
}

.page-faq .faq-more__panel {
  background: var(--faq-deep);
  border: 1px solid var(--faq-border);
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  gap: 24px;
  align-items: flex-start;
}

.page-faq .faq-more__panel h2 {
  font-family: "Archivo Black", sans-serif;
  font-size: 22px;
  margin: 0 0 8px;
}

.page-faq .faq-more__panel p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--faq-muted);
  margin: 0;
}

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

/* 按钮 */
.page-faq .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  padding: 0 24px;
  font-family: "Inter", sans-serif;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 12px 100%, 0 calc(100% - 12px));
  transition: filter 0.2s ease, transform 0.2s ease, background 0.2s ease;
}

.page-faq .btn:hover {
  transform: translateY(-1px);
  filter: brightness(1.1);
}

.page-faq .btn--cyan {
  background: var(--faq-accent);
  color: var(--faq-carbon);
  border-color: var(--faq-accent);
}

.page-faq .btn--outline {
  background: transparent;
  color: var(--faq-text);
  border-color: var(--faq-border);
}

.page-faq .btn--outline:hover {
  border-color: var(--faq-accent);
  color: var(--faq-accent);
}

/* 背景图 */
.page-faq .faq-background-img {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  pointer-events: none;
  opacity: 0.12;
  overflow: hidden;
}

.page-faq .faq-background-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  max-width: 100%;
}

/* 确保内容在背景之上 */
.page-faq .faq-hero,
.page-faq .faq-index-wrap,
.page-faq .faq-search-section,
.page-faq .faq-section,
.page-faq .faq-visual-band,
.page-faq .faq-more {
  position: relative;
  z-index: 1;
}

.page-faq .faq-visual-band {
  position: relative;
  z-index: 1;
}

/* 移动端优先已完成，以下为桌面增强 */
@media (min-width: 640px) {
  .page-faq .faq-hero h1 {
    font-size: 44px;
  }

  .page-faq .faq-hero__stats {
    gap: 0;
  }

  .page-faq .faq-stat {
    padding: 0 40px 0 0;
  }

  .page-faq .faq-stat + .faq-stat {
    padding-left: 40px;
  }

  .page-faq .faq-visual-band__grid {
    grid-template-columns: 1fr 1fr;
    gap: 48px;
  }
}

@media (min-width: 992px) {
  .page-faq .container {
    padding: 0 24px;
  }

  .page-faq .faq-hero {
    padding: 96px 0 64px;
  }

  .page-faq .faq-hero h1 {
    font-size: 52px;
    max-width: 760px;
  }

  .page-faq .faq-hero__lead {
    font-size: 18px;
    max-width: 640px;
  }

  .page-faq .faq-section {
    padding: 80px 24px 0;
  }

  .page-faq .faq-section__head {
    gap: 32px;
  }

  .page-faq .faq-item summary {
    padding: 28px 24px;
  }

  .page-faq .faq-item__a {
    padding-left: 96px;
    padding-right: 64px;
  }

  .page-faq .faq-section--deeper {
    margin-left: 24px;
    margin-right: 24px;
  }

  .page-faq .faq-more {
    padding: 64px 24px 96px;
  }

  .page-faq .faq-more__panel {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    padding: 40px 48px;
  }
}