.page-faq {
  --faq-accent: var(--neon-green);
  --faq-copper: var(--copper);
  --faq-grid-line: rgba(255,255,255,.025);
  position: relative;
  background-color: var(--ink-deep);
  background-image:
    linear-gradient(var(--faq-grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--faq-grid-line) 1px, transparent 1px);
  background-size: 36px 36px;
  min-height: 100vh;
  padding-bottom: 72px;
  overflow-x: clip;
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  padding-top: 20px;
  align-items: start;
}

.page-faq [id] {
  scroll-margin-top: 140px;
}

/* ===== 左侧目录索引 ===== */
.page-faq .faq-index {
  display: grid;
  gap: 16px;
  min-width: 0;
}

.page-faq .faq-index-card {
  position: relative;
  background: var(--ink-panel);
  border: 1px solid var(--border-grid);
  border-radius: 6px;
  box-shadow:
    4px 6px 0 var(--ink-base),
    8px 12px 0 rgba(17, 43, 92, .45);
  overflow: hidden;
}

.page-faq .faq-index-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: repeating-linear-gradient(90deg, var(--faq-copper) 0 6px, transparent 6px 12px);
  opacity: .55;
  z-index: 2;
  pointer-events: none;
}

.page-faq .faq-index-media {
  position: relative;
  border-bottom: 1px solid var(--border-grid);
  background: var(--ink-base);
}

.page-faq .faq-index-img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.page-faq .faq-index-media-code {
  position: absolute;
  bottom: 10px;
  left: 10px;
  font-family: var(--font-data);
  font-size: .7rem;
  letter-spacing: .1em;
  color: var(--neon-green);
  background: rgba(10, 31, 68, .82);
  border: 1px solid rgba(57, 255, 20, .3);
  padding: 4px 8px;
}

.page-faq .faq-index-body {
  padding: 18px 14px 14px;
}

.page-faq .faq-toc {
  display: grid;
  gap: 6px;
  margin-top: 12px;
}

.page-faq .faq-toc-link {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-primary);
  background: rgba(10, 31, 68, .5);
  border-left: 2px solid var(--border-grid);
  padding: 10px 12px;
  transition: border-color .2s var(--ease), background .2s var(--ease);
}

.page-faq .faq-toc-link:hover,
.page-faq .faq-toc-link:focus-visible {
  border-left-color: var(--neon-green);
  background: rgba(57, 255, 20, .06);
  outline: none;
}

.page-faq .faq-toc-num {
  font-family: var(--font-data);
  font-size: .74rem;
  color: var(--faq-copper);
}

.page-faq .faq-toc-text {
  font-size: .92rem;
  letter-spacing: .02em;
}

.page-faq .faq-toc-arrow {
  margin-left: auto;
  font-family: var(--font-data);
  font-size: .78rem;
  color: var(--text-secondary);
  transition: transform .2s var(--ease);
}

.page-faq .faq-toc-link:hover .faq-toc-arrow,
.page-faq .faq-toc-link:focus-visible .faq-toc-arrow {
  transform: translate(2px, -2px);
}

.page-faq .faq-index-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  border-top: 1px solid var(--border-grid);
  padding: 10px 14px;
  font-family: var(--font-data);
  font-size: .66rem;
  letter-spacing: .06em;
  color: var(--text-secondary);
}

.page-faq .faq-index-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--neon-green);
  margin-right: 6px;
  vertical-align: middle;
}

.page-faq .faq-quick-card {
  background: var(--ink-panel);
  border: 1px solid var(--border-grid);
  border-radius: 6px;
  padding: 16px;
}

.page-faq .faq-quick-text {
  margin: 12px 0 14px;
  font-size: .85rem;
  line-height: 1.7;
  color: var(--text-secondary);
}

.page-faq .faq-quick-btn {
  width: 100%;
  justify-content: center;
  text-align: center;
}

.page-faq .faq-mini-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .faq-mini-nav a {
  font-family: var(--font-data);
  font-size: .72rem;
  color: var(--text-secondary);
  text-decoration: none;
  border: 1px solid var(--border-grid);
  background: var(--ink-base);
  padding: 6px 10px;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-faq .faq-mini-nav a:hover,
.page-faq .faq-mini-nav a:focus-visible {
  color: var(--neon-green);
  border-color: rgba(57, 255, 20, .4);
  outline: none;
}

/* ===== 右侧主内容 ===== */
.page-faq .faq-main {
  min-width: 0;
}

.page-faq .faq-hero {
  position: relative;
  background: linear-gradient(135deg, var(--ink-base), var(--ink-panel));
  border: 1px solid var(--border-grid);
  border-top: 2px solid var(--neon-green);
  border-radius: 6px 6px 0 0;
  padding: 28px 20px 24px;
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: 10px;
  right: 10px;
  width: 54px;
  height: 3px;
  background: repeating-linear-gradient(90deg, var(--faq-copper) 0 4px, transparent 4px 8px);
  opacity: .6;
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -50px;
  top: -50px;
  width: 150px;
  height: 150px;
  border: 1px solid rgba(57, 255, 20, .14);
  border-radius: 50%;
  background: radial-gradient(circle, rgba(57, 255, 20, .05), transparent 65%);
  pointer-events: none;
}

.page-faq .faq-hero-top {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.page-faq .faq-hero-code {
  font-family: var(--font-data);
  font-size: .72rem;
  letter-spacing: .14em;
  color: var(--text-secondary);
}

.page-faq .faq-hero h1 {
  position: relative;
  z-index: 1;
  margin: 18px 0 12px;
  font-family: var(--font-headline);
  font-size: clamp(1.7rem, 4.4vw, 2.6rem);
  line-height: 1.22;
  letter-spacing: .02em;
  color: var(--text-primary);
}

.page-faq .faq-hero-desc {
  position: relative;
  z-index: 1;
  margin: 0;
  font-size: .95rem;
  line-height: 1.8;
  color: var(--text-secondary);
}

.page-faq .faq-search {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--ink-deep);
  border: 1px solid var(--border-grid);
  border-radius: 4px;
  padding: 8px 12px;
  margin-top: 20px;
  transition: border-color .2s var(--ease);
}

.page-faq .faq-search:focus-within {
  border-color: rgba(57, 255, 20, .5);
}

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

.page-faq .faq-search-input {
  flex: 1;
  min-width: 0;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: .92rem;
}

.page-faq .faq-search-input::placeholder {
  color: var(--text-secondary);
  opacity: .7;
}

.page-faq .faq-search-hint {
  flex-shrink: 0;
  font-family: var(--font-data);
  font-size: .66rem;
  letter-spacing: .08em;
  color: var(--text-secondary);
  border: 1px solid var(--border-grid);
  background: var(--ink-base);
  padding: 3px 8px;
  white-space: nowrap;
}

.page-faq .faq-hero-meta {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin-top: 18px;
}

.page-faq .faq-hero-meta span {
  font-family: var(--font-data);
  font-size: .72rem;
  line-height: 1.5;
  color: var(--text-secondary);
  border-left: 2px solid var(--faq-copper);
  padding-left: 10px;
}

/* ===== 章节标题条 ===== */
.page-faq .faq-section {
  margin-top: 34px;
}

.page-faq .faq-section-bar {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 16px;
}

.page-faq .faq-section-code {
  flex-shrink: 0;
  font-family: var(--font-data);
  font-size: .9rem;
  line-height: 1;
  color: var(--faq-copper);
  border: 1px solid var(--border-grid);
  background: var(--ink-base);
  padding: 8px 10px;
}

.page-faq .faq-section-title h2 {
  display: inline-block;
  margin: 0;
  font-family: var(--font-headline);
  font-size: 1.6rem;
  line-height: 1.2;
  color: var(--text-primary);
}

.page-faq .faq-section-title h2::after {
  content: "";
  display: inline-block;
  width: 34px;
  height: 2px;
  margin-left: 12px;
  background: linear-gradient(90deg, var(--faq-copper), transparent);
  vertical-align: middle;
  opacity: .85;
}

.page-faq .faq-section-desc {
  margin: 6px 0 0;
  font-size: .9rem;
  line-height: 1.7;
  color: var(--text-secondary);
}

/* ===== 手风琴 ===== */
.page-faq .faq-accordion {
  display: grid;
  gap: 10px;
}

.page-faq .faq-item {
  background: rgba(14, 37, 72, .55);
  border: 1px solid var(--border-grid);
  border-radius: 6px;
  overflow: hidden;
  transition: border-color .25s var(--ease), box-shadow .25s var(--ease);
}

.page-faq .faq-item[open] {
  border-color: rgba(57, 255, 20, .42);
  box-shadow: 4px 4px 0 rgba(57, 255, 20, .04);
}

.page-faq .faq-item summary {
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  list-style: none;
  padding: 16px;
  font-family: var(--font-headline);
  font-size: 1.02rem;
  line-height: 1.4;
  letter-spacing: .02em;
  color: var(--text-primary);
  border-bottom: 1px solid transparent;
  transition: background .2s var(--ease);
}

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

.page-faq .faq-item summary:hover {
  background: rgba(57, 255, 20, .03);
}

.page-faq .faq-item summary:focus-visible {
  outline: 2px solid var(--neon-green);
  outline-offset: -2px;
}

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

.page-faq .faq-item-index {
  flex-shrink: 0;
  min-width: 34px;
  text-align: center;
  font-family: var(--font-data);
  font-size: .74rem;
  line-height: 1;
  color: var(--faq-copper);
  border: 1px solid var(--border-grid);
  background: var(--ink-deep);
  padding: 6px 5px;
}

.page-faq .faq-item-title {
  flex: 1;
}

.page-faq .faq-item-marker {
  flex-shrink: 0;
  position: relative;
  width: 16px;
  height: 16px;
}

.page-faq .faq-item-marker::before,
.page-faq .faq-item-marker::after {
  content: "";
  position: absolute;
  background: var(--faq-copper);
  transition: transform .3s var(--ease);
}

.page-faq .faq-item-marker::before {
  left: 0;
  right: 0;
  top: 7px;
  height: 2px;
}

.page-faq .faq-item-marker::after {
  top: 0;
  bottom: 0;
  left: 7px;
  width: 2px;
}

.page-faq .faq-item[open] .faq-item-marker::after {
  transform: scaleY(0);
}

.page-faq .faq-answer {
  padding: 16px;
}

.page-faq .faq-answer p {
  margin: 0;
  font-size: .92rem;
  line-height: 1.8;
  color: var(--text-secondary);
}

.page-faq .faq-answer p + p {
  margin-top: 10px;
}

.page-faq .faq-answer a {
  color: var(--neon-green);
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

.page-faq .faq-answer-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.page-faq .faq-answer-cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 16px;
}

.page-faq .faq-answer-col {
  border: 1px solid var(--border-grid);
  background: var(--ink-deep);
  padding: 14px;
  text-align: center;
}

.page-faq .faq-answer-col-num {
  display: block;
  font-family: var(--font-data);
  font-size: 1.5rem;
  line-height: 1.2;
  color: var(--neon-green);
}

.page-faq .faq-answer-col-label {
  display: block;
  margin-top: 4px;
  font-size: .74rem;
  color: var(--text-secondary);
}

.page-faq .faq-steps {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  counter-reset: none;
}

.page-faq .faq-steps li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 0;
  font-size: .88rem;
  line-height: 1.5;
  color: var(--text-secondary);
  border-bottom: 1px dashed var(--border-grid);
}

.page-faq .faq-steps li:last-child {
  border-bottom: none;
}

.page-faq .faq-steps li span {
  flex-shrink: 0;
  min-width: 30px;
  text-align: center;
  font-family: var(--font-data);
  font-size: .7rem;
  color: var(--neon-green);
  border: 1px solid rgba(57, 255, 20, .3);
  padding: 3px 5px;
}

.page-faq .faq-answer-ref {
  display: block;
  margin-top: 14px;
  text-align: right;
  font-family: var(--font-data);
  font-size: .64rem;
  letter-spacing: .1em;
  color: var(--text-secondary);
  border-top: 1px dashed var(--border-grid);
  padding-top: 8px;
}

/* ===== 流程图 ===== */
.page-faq .faq-flow-image {
  position: relative;
  margin: 16px 0 20px;
  padding: 10px;
  background: var(--ink-panel);
  border: 1px solid var(--border-grid);
  border-radius: 6px;
}

.page-faq .faq-flow-image::before {
  content: "";
  position: absolute;
  top: 10px;
  right: 10px;
  width: 42px;
  height: 3px;
  background: repeating-linear-gradient(90deg, var(--neon-green) 0 4px, transparent 4px 8px);
  opacity: .45;
  pointer-events: none;
}

.page-faq .faq-flow-img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--border-grid);
}

.page-faq .faq-flow-image figcaption {
  margin-top: 10px;
  padding-right: 4px;
  color: var(--text-secondary);
}

/* ===== 通联面板 ===== */
.page-faq .faq-contact-panel {
  position: relative;
  margin-top: 20px;
  padding: 20px;
  background: var(--ink-base);
  border: 1px solid var(--border-grid);
  border-radius: 6px;
}

.page-faq .faq-contact-panel::before {
  content: "";
  position: absolute;
  top: -1px;
  right: 16px;
  width: 54px;
  height: 2px;
  background: var(--highlight-gradient);
}

.page-faq .faq-contact-panel-code {
  font-family: var(--font-data);
  font-size: .72rem;
  letter-spacing: .12em;
  color: var(--faq-copper);
}

.page-faq .faq-contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: 16px;
}

.page-faq .faq-contact-item {
  border-top: 1px solid var(--border-grid);
  padding-top: 10px;
}

.page-faq .faq-contact-label {
  display: block;
  font-size: .72rem;
  letter-spacing: .08em;
  color: var(--text-secondary);
}

.page-faq .faq-contact-value {
  display: block;
  margin-top: 4px;
  font-family: var(--font-data);
  font-size: .9rem;
  line-height: 1.4;
  color: var(--text-primary);
  word-break: break-all;
}

.page-faq .faq-contact-note {
  margin: 16px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--border-grid);
  font-size: .8rem;
  line-height: 1.75;
  color: var(--text-secondary);
}

/* ===== 响应式增强 ===== */
@media (min-width: 600px) {
  .page-faq .faq-hero-meta {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-contact-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: 320px minmax(0, 1fr);
    gap: 44px;
    padding-top: 40px;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 120px;
  }

  .page-faq .faq-section {
    margin-top: 48px;
  }

  .page-faq .faq-hero {
    padding: 34px 28px 28px;
  }

  .page-faq .faq-item summary {
    padding: 18px 20px;
  }

  .page-faq .faq-answer {
    padding: 18px 20px 20px;
  }
}