.page-faq {
  --faq-sidebar-w: 280px;
  background: var(--space-blue);
  color: var(--silver-white);
}

.page-faq .container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: clamp(16px, 3vw, 24px);
}

/* ===== Hero 框景首屏 ===== */
.page-faq .faq-hero {
  position: relative;
  margin-top: 32px;
  margin-bottom: 40px;
  padding: 32px clamp(16px, 4vw, 48px);
  background-color: var(--ink-blue);
  background-image:
    linear-gradient(rgba(232, 238, 247, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(232, 238, 247, 0.04) 1px, transparent 1px),
    radial-gradient(circle at 82% 18%, rgba(0, 255, 136, 0.1), transparent 42%),
    radial-gradient(circle at 8% 80%, rgba(255, 107, 53, 0.08), transparent 38%);
  background-size: 44px 44px, 44px 44px, 100% 100%, 100% 100%;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  box-shadow: 0 24px 60px rgba(5, 11, 26, 0.6);
  overflow: hidden;
}

.page-faq .faq-hero::before,
.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  width: 28px;
  height: 28px;
  pointer-events: none;
}

.page-faq .faq-hero::before {
  top: 10px;
  left: 10px;
  border-top: 2px solid var(--neon-green);
  border-left: 2px solid var(--neon-green);
  border-top-left-radius: 8px;
}

.page-faq .faq-hero::after {
  right: 10px;
  bottom: 10px;
  border-right: 2px solid var(--vital-orange);
  border-bottom: 2px solid var(--vital-orange);
  border-bottom-right-radius: 8px;
}

.page-faq .faq-hero__grid {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 28px;
}

.page-faq .faq-hero__text {
  max-width: 640px;
}

.page-faq .faq-hero__kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--neon-green);
  text-transform: uppercase;
}

.page-faq .faq-hero__kicker::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--neon-green);
  box-shadow: 0 0 12px var(--glow-green);
}

.page-faq .faq-hero h1 {
  margin: 14px 0 12px;
  font-family: var(--font-display);
  font-size: clamp(48px, 7vw, 76px);
  line-height: 0.95;
  letter-spacing: 0.01em;
  color: var(--silver-white);
  text-transform: uppercase;
}

.page-faq .faq-hero__lead {
  margin: 0;
  max-width: 480px;
  font-size: var(--text-lg);
  line-height: 1.7;
  color: var(--text-muted);
}

.page-faq .faq-hero__search {
  flex: 1 1 340px;
  max-width: 460px;
}

.page-faq .faq-hero__search-input {
  width: 100%;
  padding: 15px 22px;
  font-family: var(--font-body);
  font-size: var(--text-md);
  color: var(--silver-white);
  background: rgba(5, 11, 26, 0.82);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-pill);
  outline: none;
  transition: border-color var(--dur) var(--ease-out), box-shadow var(--dur) var(--ease-out);
}

.page-faq .faq-hero__search-input::placeholder {
  color: var(--text-faint);
}

.page-faq .faq-hero__search-input:focus {
  border-color: var(--neon-green);
  box-shadow: 0 0 0 3px rgba(0, 255, 136, 0.15), 0 0 26px rgba(0, 255, 136, 0.18);
}

.page-faq .faq-hero__hint {
  display: block;
  margin-top: 10px;
  padding-left: 22px;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-faint);
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 30px;
  padding-top: 22px;
  border-top: 1px dashed rgba(232, 238, 247, 0.18);
}

/* ===== 面包屑 ===== */
.page-faq .breadcrumb {
  margin-bottom: 28px;
}

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

.page-faq .breadcrumb__link {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--dur) var(--ease-out);
}

.page-faq .breadcrumb__link:hover,
.page-faq .breadcrumb__link:focus-visible {
  color: var(--neon-green);
}

.page-faq .breadcrumb__link[aria-current="page"] {
  color: var(--silver-white);
  cursor: default;
}

.page-faq .breadcrumb__sep {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-faint);
}

/* ===== 两栏布局 ===== */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: var(--faq-sidebar-w) minmax(0, 1fr);
  gap: 28px;
  align-items: start;
  padding-bottom: 72px;
}

/* ===== 左侧暖纸侧栏 ===== */
.page-faq .faq-sidebar {
  position: sticky;
  top: calc(var(--header-h) + 24px);
  background: var(--paper-warm);
  color: var(--ink-blue);
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  box-shadow: 0 24px 48px rgba(5, 11, 26, 0.45);
}

.page-faq .faq-sidebar__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(11, 27, 61, 0.12);
}

.page-faq .faq-sidebar__title {
  font-family: var(--font-display);
  font-size: 24px;
  line-height: 1;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.page-faq .faq-sidebar__count {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--vital-orange);
}

.page-faq .faq-sidebar__list {
  display: grid;
  gap: 6px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-sidebar__link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: var(--text-md);
  font-weight: 600;
  color: var(--ink-blue);
  text-decoration: none;
  transition: background var(--dur) var(--ease-out), opacity var(--dur) var(--ease-out);
}

.page-faq .faq-sidebar__link:hover,
.page-faq .faq-sidebar__link:focus-visible {
  outline: none;
  background: rgba(11, 27, 61, 0.08);
}

.page-faq .faq-sidebar__num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--vital-orange);
  letter-spacing: 0.06em;
}

.page-faq .faq-sidebar__note {
  margin-top: 22px;
  padding: 16px;
  background: var(--ink-blue);
  border-radius: var(--radius-md);
  color: var(--silver-white);
}

.page-faq .faq-sidebar__note p {
  margin: 0 0 6px;
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--text-muted);
}

.page-faq .faq-sidebar__note p:first-child {
  font-family: var(--font-display);
  font-size: 18px;
  letter-spacing: 0.03em;
  color: var(--silver-white);
  text-transform: uppercase;
}

.page-faq .faq-sidebar__note .btn {
  margin-top: 12px;
  font-size: var(--text-sm);
}

.page-faq .faq-sidebar__legend {
  display: grid;
  gap: 8px;
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid rgba(11, 27, 61, 0.12);
}

.page-faq .faq-sidebar__legend .legend__item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: rgba(11, 27, 61, 0.72);
}

/* ===== 右侧问题区 ===== */
.page-faq .faq-content {
  min-width: 0;
}

.page-faq .faq-section {
  margin-bottom: 56px;
  scroll-margin-top: calc(var(--header-h) + 16px);
}

.page-faq .faq-section .section__head {
  margin-bottom: 22px;
}

.page-faq .faq-section .section__title {
  margin-top: 8px;
}

.page-faq .faq-section .section__intro {
  margin-top: 10px;
}

/* ===== 手风琴列表 ===== */
.page-faq .faq-list {
  display: grid;
  gap: 12px;
}

.page-faq .faq-item {
  position: relative;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  transition: border-color var(--dur) var(--ease-out), background var(--dur) var(--ease-out);
}

.page-faq .faq-item:hover,
.page-faq .faq-item:has(.faq-item__toggle:checked) {
  border-color: var(--border-strong);
  background: rgba(255, 255, 255, 0.05);
}

.page-faq .faq-item__toggle {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-faq .faq-item__head {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 20px;
  cursor: pointer;
  user-select: none;
}

.page-faq .faq-item__num {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  line-height: 1;
  color: var(--neon-green);
  min-width: 30px;
  letter-spacing: 0.02em;
}

.page-faq .faq-item__question {
  font-size: var(--text-md);
  font-weight: 600;
  line-height: 1.5;
  color: var(--silver-white);
}

.page-faq .faq-item__icon {
  flex: 0 0 auto;
  width: 28px;
  height: 28px;
  margin-left: auto;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--space-blue);
  color: var(--neon-green);
  transition: transform var(--dur) var(--ease-out), background var(--dur) var(--ease-out), color var(--dur) var(--ease-out);
}

.page-faq .faq-item__icon::before {
  content: "+";
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 700;
  line-height: 1;
}

.page-faq .faq-item__toggle:checked ~ .faq-item__head .faq-item__icon {
  transform: rotate(45deg);
  background: var(--neon-green);
  color: var(--ink-blue);
}

.page-faq .faq-item__toggle:focus-visible ~ .faq-item__head {
  outline: 2px solid var(--neon-green);
  outline-offset: -2px;
  border-radius: var(--radius-md);
}

.page-faq .faq-item__body {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows calc(var(--dur) * 1.6) var(--ease-out);
}

.page-faq .faq-item__toggle:checked ~ .faq-item__body {
  grid-template-rows: 1fr;
}

.page-faq .faq-item__inner {
  min-height: 0;
  overflow: hidden;
}

.page-faq .faq-item__answer {
  padding: 2px 20px 20px 64px;
  border-top: 1px dashed rgba(232, 238, 247, 0.1);
}

.page-faq .faq-item__answer p {
  margin: 12px 0 0;
  font-size: var(--text-md);
  line-height: 1.75;
  color: var(--text-muted);
}

.page-faq .faq-item__answer p:first-child {
  margin-top: 12px;
}

.page-faq .faq-item__answer a {
  color: var(--neon-green);
  text-decoration: underline;
  text-underline-offset: 2px;
  word-break: break-all;
}

.page-faq .faq-item__list {
  margin: 12px 0 0;
  padding-left: 20px;
  display: grid;
  gap: 6px;
}

.page-faq .faq-item__list li {
  font-size: var(--text-md);
  line-height: 1.6;
  color: var(--text-muted);
}

.page-faq .faq-item__list li::marker {
  color: var(--neon-green);
}

/* ===== 附图卡片 ===== */
.page-faq .faq-figure {
  margin: 20px 0 0;
  padding: 8px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
}

.page-faq .faq-figure--inside {
  margin: 16px 0 4px;
}

.page-faq .faq-figure__media {
  border-radius: calc(var(--radius-md) - 4px);
  overflow: hidden;
  background: var(--ink-blue);
}

.page-faq .faq-figure__media img {
  display: block;
  width: 100%;
  height: auto;
}

.page-faq .faq-figure figcaption {
  padding: 12px 14px 8px;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  line-height: 1.6;
  color: var(--text-muted);
}

/* ===== 联系支持卡片 ===== */
.page-faq .faq-support {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  padding: 32px;
  background: var(--ink-blue);
  border: 1px solid var(--border-strong);
  border-left: 4px solid var(--vital-orange);
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 48px rgba(5, 11, 26, 0.5);
}

.page-faq .faq-support::before {
  content: "";
  position: absolute;
  top: -1px;
  right: 32px;
  width: 72px;
  height: 2px;
  background: var(--vital-orange);
  box-shadow: 0 0 18px var(--glow-orange);
}

.page-faq .faq-support__main {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
}

.page-faq .faq-support__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 34px;
  line-height: 1.1;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--silver-white);
}

.page-faq .faq-support__desc {
  margin: 14px 0 20px;
  font-size: var(--text-md);
  line-height: 1.75;
  color: var(--text-muted);
}

.page-faq .faq-support__info {
  display: grid;
  gap: 18px;
  margin: 0;
  padding: 0;
}

.page-faq .faq-support__item {
  margin: 0;
}

.page-faq .faq-support__item dt {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-faint);
}

.page-faq .faq-support__item dd {
  margin: 6px 0 0;
  font-size: var(--text-md);
  font-weight: 600;
  line-height: 1.55;
  color: var(--silver-white);
}

.page-faq .faq-support__item dd a {
  color: var(--neon-green);
  text-decoration: none;
  word-break: break-all;
}

.page-faq .faq-support__item dd a:hover,
.page-faq .faq-support__item dd a:focus-visible {
  outline: none;
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* ===== 响应式 ===== */
@media (max-width: 1023px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 36px;
  }

  .page-faq .faq-sidebar {
    position: static;
    padding: 20px;
  }

  .page-faq .faq-sidebar__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px;
  }

  .page-faq .faq-sidebar__link {
    padding: 10px 14px;
    background: rgba(11, 27, 61, 0.06);
    border-radius: var(--radius-pill);
    justify-content: center;
  }

  .page-faq .faq-sidebar__link:hover,
  .page-faq .faq-sidebar__link:focus-visible {
    background: rgba(11, 27, 61, 0.12);
  }

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

  .page-faq .faq-sidebar__legend {
    grid-template-columns: repeat(2, max-content);
    justify-content: start;
    gap: 12px;
  }

  .page-faq .faq-support {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }
}

@media (max-width: 640px) {
  .page-faq .faq-hero {
    padding: 24px 16px;
    border-radius: var(--radius-md);
  }

  .page-faq .faq-hero__grid {
    display: grid;
    gap: 20px;
  }

  .page-faq .faq-hero h1 {
    font-size: 42px;
  }

  .page-faq .faq-hero__lead {
    font-size: var(--text-md);
  }

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

  .page-faq .faq-item__head {
    gap: 10px;
    padding: 14px 14px;
  }

  .page-faq .faq-item__num {
    font-size: 16px;
    min-width: 24px;
  }

  .page-faq .faq-item__question {
    font-size: 14px;
  }

  .page-faq .faq-item__answer {
    padding: 2px 14px 16px;
  }

  .page-faq .faq-item__answer p,
  .page-faq .faq-item__list li {
    font-size: 14px;
  }

  .page-faq .faq-item__icon {
    width: 24px;
    height: 24px;
  }

  .page-faq .faq-item__icon::before {
    font-size: 14px;
  }

  .page-faq .faq-support {
    padding: 24px 16px;
  }

  .page-faq .faq-support__title {
    font-size: 28px;
  }
}

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