.page-faq {
  --faq-accent: var(--c-neon);
  --faq-gold: var(--c-gold);
  --faq-card: var(--c-card);
  --faq-line: var(--c-line);
  background-color: var(--c-deep);
  color: var(--c-text);
}

.page-faq img {
  max-width: 100%;
}

/* ===== Hero 区域 ===== */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: 40px 0 0;
  background-color: var(--c-deep);
  background-image:
    radial-gradient(circle at 88% 12%, rgba(57, 255, 20, 0.12), transparent 32%),
    linear-gradient(145deg, var(--c-card) 0%, var(--c-deep) 58%);
}

.page-faq .faq-hero-inner {
  position: relative;
  z-index: 1;
  max-width: 820px;
}

.page-faq .faq-hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border: 1px solid rgba(255, 215, 0, 0.4);
  border-radius: var(--radius-pill);
  color: var(--c-gold);
  background: rgba(11, 30, 58, 0.65);
  font-family: var(--f-data);
  font-size: 13px;
  letter-spacing: 0.08em;
  margin-bottom: 18px;
}

.page-faq .faq-hero h1 {
  font-family: var(--f-heading);
  font-size: 34px;
  line-height: 1.25;
  margin: 0 0 16px;
  letter-spacing: 0.01em;
}

.page-faq .faq-hero-desc {
  margin: 0;
  color: var(--c-text2);
  font-size: 16px;
  line-height: 1.7;
  max-width: 680px;
}

.page-faq .faq-hero-img {
  display: block;
  width: 100%;
  height: clamp(180px, 28vw, 300px);
  object-fit: cover;
  border-radius: var(--radius) var(--radius) 0 0;
  margin-top: 32px;
  background: var(--c-card);
}

/* ===== 章节预览 ===== */
.page-faq .faq-chapters {
  padding: 32px 0 8px;
}

.page-faq .faq-chapter-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.page-faq .faq-chapter-chip {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 16px;
  background: var(--c-card);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-pill);
  color: var(--c-text);
  text-decoration: none;
  font-family: var(--f-body);
  font-size: 14px;
  font-weight: 600;
  transition:
    border-color var(--speed) var(--ease),
    transform var(--speed) var(--ease),
    box-shadow var(--speed) var(--ease);
}

.page-faq .faq-chapter-chip:hover,
.page-faq .faq-chapter-chip:focus-visible {
  border-color: var(--c-neon);
  transform: translateY(-3px);
  box-shadow: 0 10px 24px rgba(57, 255, 20, 0.14);
  outline: none;
}

.page-faq .faq-chapter-num {
  font-family: var(--f-data);
  font-size: 13px;
  color: var(--c-gold);
  font-weight: 400;
}

.page-faq .faq-chapter-label {
  white-space: nowrap;
}

/* ===== 主内容 ===== */
.page-faq .faq-main {
  padding: 40px 0 72px;
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

/* --- 索引侧栏 --- */
.page-faq .faq-index {
  display: none;
}

.page-faq .faq-index-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 24px 18px;
  background: var(--c-card);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
}

.page-faq .faq-index-caption {
  font-family: var(--f-data);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--c-neon);
  text-transform: uppercase;
  margin: 0 0 4px;
}

.page-faq .faq-index-heading {
  font-family: var(--f-heading);
  font-size: 18px;
  margin: 0 0 12px;
}

.page-faq .faq-index-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  color: var(--c-text2);
  text-decoration: none;
  font-size: 14px;
  transition:
    background var(--speed) var(--ease),
    color var(--speed) var(--ease),
    transform var(--speed) var(--ease);
}

.page-faq .faq-index-link:hover {
  background: rgba(57, 255, 20, 0.08);
  color: var(--c-text);
  transform: translateX(4px);
}

.page-faq .faq-index-num {
  font-family: var(--f-data);
  font-size: 13px;
  color: var(--c-gold);
}

.page-faq .faq-index-cta {
  margin-top: 16px;
  text-align: center;
}

/* --- 手风琴面板 --- */
.page-faq .faq-panels {
  display: flex;
  flex-direction: column;
  gap: 48px;
}

.page-faq .faq-section {
  scroll-margin-top: calc(var(--header-h) + 20px);
}

.page-faq .faq-section-head {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 18px;
}

.page-faq .faq-section-num {
  font-family: var(--f-data);
  font-size: 18px;
  color: var(--c-neon);
  padding: 4px 10px;
  border: 1px solid currentColor;
  border-radius: var(--radius-sm);
  line-height: 1;
}

.page-faq .faq-section-head h2 {
  font-family: var(--f-heading);
  font-size: 26px;
  margin: 0;
  letter-spacing: 0.01em;
}

.page-faq .faq-section-tag {
  font-family: var(--f-data);
  font-size: 12px;
  color: var(--c-silver);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-pill);
  padding: 4px 10px;
  margin-left: auto;
}

.page-faq .faq-card {
  background: var(--c-card);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  overflow: hidden;
}

/* --- details 手风琴 --- */
.page-faq .faq-item {
  border-bottom: 1px solid var(--c-line);
}

.page-faq .faq-item:last-child {
  border-bottom: 0;
}

.page-faq .faq-item summary {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 20px;
  cursor: pointer;
  transition: background var(--speed) var(--ease);
}

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

.page-faq .faq-item summary:hover,
.page-faq .faq-item[open] summary {
  background: rgba(57, 255, 20, 0.06);
}

.page-faq .faq-item[open] summary {
  border-bottom: 1px solid var(--c-line);
}

.page-faq .faq-q-mark {
  width: 24px;
  height: 24px;
  flex: none;
  color: var(--c-neon);
}

.page-faq .faq-q-text {
  flex: 1;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
}

.page-faq .faq-q-toggle {
  position: relative;
  width: 18px;
  height: 18px;
  flex: none;
}

.page-faq .faq-q-toggle::before,
.page-faq .faq-q-toggle::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  border-radius: 3px;
  background: var(--c-silver);
  transition:
    transform var(--speed) var(--ease),
    background var(--speed) var(--ease);
}

.page-faq .faq-q-toggle::before {
  width: 14px;
  height: 2px;
}

.page-faq .faq-q-toggle::after {
  width: 2px;
  height: 14px;
}

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

.page-faq .faq-item[open] .faq-q-toggle::before {
  background: var(--c-neon);
}

.page-faq .faq-answer {
  padding: 14px 24px 20px 54px;
  color: var(--c-text2);
  font-size: 15px;
  line-height: 1.8;
  background: rgba(255, 255, 255, 0.025);
}

.page-faq .faq-answer p {
  margin: 0 0 12px;
}

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

.page-faq .faq-inline-link {
  color: var(--c-neon);
  text-decoration: underline;
  text-underline-offset: 4px;
  transition: color var(--speed) var(--ease);
}

.page-faq .faq-inline-link:hover {
  color: var(--c-gold);
}

.page-faq .faq-more-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  color: var(--c-neon);
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
}

.page-faq .faq-more-link::after {
  content: "→";
  transition: transform var(--speed) var(--ease);
}

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

/* ===== 反馈与联系 ===== */
.page-faq .faq-feedback {
  padding: 56px 0 80px;
  background-color: var(--c-deep);
}

.page-faq .faq-feedback-head {
  margin-bottom: 28px;
  max-width: 680px;
}

.page-faq .faq-feedback-head .faq-section-num {
  display: inline-block;
  margin-bottom: 12px;
}

.page-faq .faq-feedback-head h2 {
  font-family: var(--f-heading);
  font-size: 28px;
  margin: 0 0 12px;
}

.page-faq .faq-feedback-head p {
  color: var(--c-text2);
  margin: 0;
  line-height: 1.7;
}

.page-faq .faq-feedback-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: center;
}

.page-faq .faq-feedback-card {
  background: var(--c-card);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  padding: 28px 24px;
}

.page-faq .faq-feedback-label {
  font-family: var(--f-data);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-gold);
  margin: 0 0 8px;
}

.page-faq .faq-feedback-card h3 {
  font-family: var(--f-heading);
  font-size: 22px;
  margin: 0 0 14px;
}

.page-faq .faq-feedback-card p {
  color: var(--c-text2);
  line-height: 1.75;
  margin: 0 0 16px;
}

.page-faq .faq-contact-list {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-faq .faq-contact-list li {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 12px;
  font-size: 14px;
  color: var(--c-text);
  align-items: baseline;
}

.page-faq .faq-contact-list .data-label {
  min-width: 52px;
  color: var(--c-silver);
  font-family: var(--f-data);
  font-size: 12px;
}

.page-faq .faq-contact-note {
  font-size: 13px;
  color: var(--c-text2);
  border-top: 1px solid var(--c-line);
  padding-top: 14px;
}

.page-faq .faq-feedback-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 6px;
}

.page-faq .faq-feedback-img {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  object-fit: cover;
  border: 1px solid var(--c-line);
}

/* ===== 桌面断点 ===== */
@media (min-width: 1024px) {
  .page-faq .faq-hero {
    padding: 56px 0 0;
  }

  .page-faq .faq-hero h1 {
    font-size: 48px;
    line-height: 1.2;
  }

  .page-faq .faq-hero-desc {
    font-size: 17px;
  }

  .page-faq .faq-hero-img {
    margin-top: 40px;
    height: 300px;
  }

  .page-faq .faq-chapter-list {
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
  }

  .page-faq .faq-chapter-chip {
    padding: 16px 20px;
    font-size: 15px;
  }

  .page-faq .faq-main {
    padding: 56px 0 88px;
  }

  .page-faq .faq-layout {
    grid-template-columns: 280px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

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

  .page-faq .faq-index-card {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }

  .page-faq .faq-panels {
    gap: 64px;
  }

  .page-faq .faq-section-head h2 {
    font-size: 30px;
  }

  .page-faq .faq-feedback {
    padding: 72px 0 96px;
  }

  .page-faq .faq-feedback-grid {
    grid-template-columns: minmax(0, 1fr) 0.9fr;
    gap: 40px;
  }

  .page-faq .faq-feedback-card {
    padding: 36px 32px;
  }
}