.page-faq {
  --faq-navy: #0A1128;
  --faq-navy-soft: #0D1530;
  --faq-cyan: #00E5FF;
  --faq-orange: #FF5A00;
  --faq-amber: #FFB800;
  --faq-green: #00C48C;
  --faq-ink: #1A2B4C;
  --faq-muted: #5A6B8C;
  --faq-border: #E2E8F0;
  --faq-bg: #F5F7FA;
  background: var(--faq-bg);
  color: var(--faq-ink);
  font-family: var(--font-body);
  line-height: 1.75;
  overflow-x: hidden;
}
.page-faq .container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}
.page-faq a {
  color: inherit;
  text-decoration: none;
}

/* 首屏：专题封面 */
.page-faq .faq-hero {
  background:
    radial-gradient(circle at 85% 18%, rgba(0, 229, 255, 0.16) 0%, rgba(0, 229, 255, 0) 30%),
    radial-gradient(circle at 12% 88%, rgba(255, 90, 0, 0.12) 0%, rgba(255, 90, 0, 0) 32%),
    linear-gradient(135deg, var(--faq-navy) 0%, var(--faq-navy-soft) 56%, var(--faq-navy) 100%);
  color: #FFFFFF;
  padding: 72px 0 44px;
  position: relative;
  border-bottom: 2px solid rgba(0, 229, 255, 0.5);
}
.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 44px 44px;
}
.page-faq .faq-hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}
.page-faq .faq-hero__eyebrow {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--faq-cyan);
  margin: 0 0 12px;
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.page-faq .faq-hero__eyebrow::before {
  content: "";
  display: block;
  width: 32px;
  height: 2px;
  background: var(--faq-orange);
}
.page-faq .faq-hero__title {
  font-family: var(--font-heading);
  font-size: clamp(34px, 6vw, 54px);
  line-height: 1.1;
  letter-spacing: 0.02em;
  margin: 0 0 16px;
  max-width: 820px;
}
.page-faq .faq-hero__lead {
  font-size: 16px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.82);
  max-width: 680px;
  margin: 0 0 20px;
}
.page-faq .faq-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 0 0 8px;
}
.page-faq .faq-hero__stat {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--faq-cyan);
  background: rgba(0, 229, 255, 0.08);
  border: 1px solid rgba(0, 229, 255, 0.3);
  border-radius: 999px;
  padding: 5px 14px;
}
.page-faq .faq-hero__search {
  position: relative;
  max-width: 720px;
  margin-top: 10px;
}
.page-faq .faq-search__label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 10px;
  color: rgba(255, 255, 255, 0.92);
}
.page-faq .faq-search__field {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 10px;
  padding: 0 14px;
  transition: border-color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}
.page-faq .faq-search__field:focus-within {
  border-color: var(--faq-cyan);
  background: rgba(255, 255, 255, 0.12);
  box-shadow: 0 0 0 4px rgba(0, 229, 255, 0.16);
}
.page-faq .faq-search__icon {
  color: var(--faq-cyan);
  flex: 0 0 auto;
}
.page-faq .faq-search__input {
  width: 100%;
  background: transparent;
  border: 0;
  outline: none;
  color: #FFFFFF;
  font-family: var(--font-body);
  font-size: 16px;
  padding: 14px 0;
}
.page-faq .faq-search__input::placeholder {
  color: rgba(255, 255, 255, 0.52);
}
.page-faq .faq-hero__search-hint {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.58);
  margin: 10px 0 0;
}

/* 首屏内快速锚点导航 */
.page-faq .faq-rail {
  position: relative;
  display: flex;
  flex-wrap: nowrap;
  gap: 10px;
  overflow-x: auto;
  padding: 24px 2px 8px;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.page-faq .faq-rail::-webkit-scrollbar {
  display: none;
}
.page-faq .faq-rail__link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.84);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 999px;
  padding: 8px 18px;
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}
.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  border-color: var(--faq-cyan);
  color: var(--faq-cyan);
  transform: translateY(-2px);
}
.page-faq .faq-rail__num {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--faq-orange);
}

/* FAQ 主区域 */
.page-faq .faq-board {
  padding: 52px 0 72px;
}
.page-faq .faq-board__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: start;
}

/* 左侧面板 */
.page-faq .faq-aside {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}
.page-faq .faq-aside__card {
  background: rgba(10, 17, 40, 0.45);
  border: 1px solid rgba(10, 17, 40, 0.08);
  border-radius: 16px;
  padding: 22px 20px;
  box-shadow: 0 2px 12px rgba(10, 17, 40, 0.06);
}
.page-faq .faq-aside__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--faq-ink);
  opacity: 0.7;
  margin: 0 0 14px;
  text-transform: uppercase;
}
.page-faq .faq-aside__item {
  display: block;
  font-size: 15px;
  font-weight: 600;
  color: var(--faq-ink);
  padding: 9px 0;
  border-bottom: 1px dashed var(--faq-border);
  transition: color 0.18s ease, padding-left 0.18s ease;
}
.page-faq .faq-aside__item:last-child {
  border-bottom: 0;
}
.page-faq .faq-aside__item:hover,
.page-faq .faq-aside__item:focus-visible {
  color: var(--faq-cyan);
  padding-left: 6px;
}
.page-faq .faq-aside__figure {
  margin: 0;
  border-radius: 16px;
  overflow: hidden;
  background: #FFFFFF;
  border: 1px solid var(--faq-border);
  box-shadow: 0 2px 12px rgba(10, 17, 40, 0.06);
}
.page-faq .faq-aside__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}
.page-faq .faq-aside__figure figcaption {
  font-size: 13px;
  color: var(--faq-muted);
  padding: 12px 14px;
  border-top: 1px solid var(--faq-border);
  line-height: 1.6;
}

/* 问答分组 */
.page-faq .faq-accordion-wrap {
  min-width: 0;
}
.page-faq .faq-group {
  counter-increment: faq-group;
}
.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin: 0 0 18px;
  padding-top: 34px;
  position: relative;
}
.page-faq .faq-group__head:first-child {
  padding-top: 0;
}
.page-faq .faq-group__head::before {
  content: "";
  position: absolute;
  left: 0;
  top: 100%;
  width: 36px;
  height: 3px;
  background: linear-gradient(90deg, var(--faq-cyan), transparent);
  border-radius: 2px;
}
.page-faq .faq-group__index {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 800;
  color: var(--faq-orange);
  line-height: 1;
}
.page-faq .faq-group__title {
  font-family: var(--font-heading);
  font-size: 24px;
  letter-spacing: 0.02em;
  color: var(--faq-navy);
  margin: 0;
  line-height: 1.2;
}

/* 手风琴 */
.page-faq .faq-accordion {
  display: grid;
  gap: 16px;
}
.page-faq .faq-item {
  background: #FFFFFF;
  border: 1px solid var(--faq-border);
  border-radius: 16px;
  box-shadow: 0 2px 12px rgba(10, 17, 40, 0.05);
  position: relative;
  overflow: hidden;
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}
.page-faq .faq-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: transparent;
  transition: background 0.25s ease;
}
.page-faq .faq-item[open] {
  border-color: rgba(0, 229, 255, 0.45);
  box-shadow: 0 8px 28px rgba(10, 17, 40, 0.1);
}
.page-faq .faq-item[open]::before {
  background: linear-gradient(180deg, var(--faq-cyan), var(--faq-green));
}
.page-faq .faq-item__summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 20px 18px;
  position: relative;
  user-select: none;
}
.page-faq .faq-item__summary::-webkit-details-marker {
  display: none;
}
.page-faq .faq-item__summary:hover .faq-item__question {
  color: var(--faq-cyan);
}
.page-faq .faq-item__q,
.page-faq .faq-item__a {
  font-family: var(--font-mono);
  font-weight: 800;
  color: var(--faq-cyan);
  background: rgba(0, 229, 255, 0.12);
  border-radius: 8px;
  min-width: 30px;
  height: 30px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  flex: 0 0 30px;
  line-height: 1;
}
.page-faq .faq-item__question {
  flex: 1;
  font-family: var(--font-heading);
  font-size: 17px;
  line-height: 1.45;
  color: var(--faq-ink);
  letter-spacing: 0.01em;
  transition: color 0.2s ease;
}
.page-faq .faq-item__toggle {
  position: relative;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 1px solid var(--faq-border);
  flex: 0 0 20px;
  margin-top: 2px;
  transition: transform 0.25s ease, border-color 0.2s ease, background 0.2s ease;
}
.page-faq .faq-item__toggle::before,
.page-faq .faq-item__toggle::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 9px;
  height: 2px;
  background: var(--faq-ink);
  transform: translate(-50%, -50%);
  border-radius: 2px;
  transition: background 0.2s ease;
}
.page-faq .faq-item__toggle::after {
  transform: translate(-50%, -50%) rotate(90deg);
}
.page-faq .faq-item[open] .faq-item__toggle {
  border-color: var(--faq-cyan);
  background: var(--faq-cyan);
  transform: rotate(180deg);
}
.page-faq .faq-item[open] .faq-item__toggle::before,
.page-faq .faq-item[open] .faq-item__toggle::after {
  background: var(--faq-navy);
}
.page-faq .faq-item__toggle::marker {
  content: "";
}

/* 答案 */
.page-faq .faq-item__answer {
  display: grid;
  grid-template-columns: 30px 1fr;
  gap: 14px;
  align-items: start;
  margin: 0 18px 22px 18px;
  padding: 16px 18px;
  background: rgba(245, 247, 250, 0.72);
  border: 1px dashed var(--faq-border);
  border-left: 3px solid var(--faq-cyan);
  border-radius: 12px;
  animation: faq-fade-up 0.3s ease both;
}
.page-faq .faq-item__a {
  color: var(--faq-orange);
  background: rgba(255, 90, 0, 0.12);
}
.page-faq .faq-item__body {
  min-width: 0;
}
.page-faq .faq-item__body p {
  margin: 0 0 10px;
  font-size: 15px;
  color: var(--faq-ink);
}
.page-faq .faq-item__body p:last-child {
  margin-bottom: 0;
}
.page-faq .faq-item__remark {
  font-size: 14px;
  color: var(--faq-muted);
  padding-left: 12px;
  border-left: 2px solid var(--faq-border);
}
.page-faq .faq-item__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
  color: var(--faq-cyan);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}
.page-faq .faq-item__link:hover {
  border-bottom-color: var(--faq-cyan);
}

/* 延伸了解面板 */
.page-faq .faq-morepanel {
  margin-top: 32px;
  background:
    radial-gradient(circle at 90% 20%, rgba(0, 229, 255, 0.12) 0%, rgba(0, 229, 255, 0) 34%),
    linear-gradient(135deg, var(--faq-navy) 0%, var(--faq-navy-soft) 100%);
  border-radius: 18px;
  padding: 28px 24px;
  color: #FFFFFF;
  border: 1px solid rgba(0, 229, 255, 0.22);
}
.page-faq .faq-morepanel__title {
  font-family: var(--font-heading);
  font-size: 22px;
  margin: 0 0 6px;
}
.page-faq .faq-morepanel__desc {
  margin: 0 0 18px;
  color: rgba(255, 255, 255, 0.74);
  font-size: 15px;
}
.page-faq .faq-morepanel__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 16px;
}
.page-faq .btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--faq-orange);
  color: #FFFFFF;
  font-weight: 700;
  font-size: 15px;
  font-family: var(--font-body);
  border: 0;
  border-radius: 10px;
  padding: 12px 26px;
  cursor: pointer;
  transition: transform 0.18s ease, background 0.18s ease, box-shadow 0.18s ease;
  box-shadow: 0 4px 16px rgba(255, 90, 0, 0.3);
}
.page-faq .btn-primary:hover {
  background: #e85100;
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(255, 90, 0, 0.36);
}
.page-faq .btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  color: var(--faq-cyan);
  font-weight: 700;
  font-size: 15px;
  font-family: var(--font-body);
  border: 1px solid var(--faq-cyan);
  border-radius: 10px;
  padding: 11px 26px;
  cursor: pointer;
  transition: background 0.18s ease, transform 0.18s ease;
}
.page-faq .btn-ghost:hover {
  background: rgba(0, 229, 255, 0.12);
  transform: translateY(-2px);
}
.page-faq .faq-morepanel__meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  color: rgba(255, 255, 255, 0.52);
  letter-spacing: 0.02em;
}

/* 动画 */
@keyframes faq-fade-up {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 无 JS 渐进增强：details 默认展开动画 */
@supports (interpolate-size: allow-keywords) {
  .page-faq .faq-item,
  .page-faq .faq-item details {
    interpolate-size: allow-keywords;
  }
  .page-faq .faq-item .faq-item__answer {
    animation: none;
  }
}

/* 桌面端 */
@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding: 96px 0 60px;
  }
  .page-faq .faq-hero__grid {
    grid-template-columns: 1.25fr 0.75fr;
    gap: 48px;
    align-items: center;
  }
  .page-faq .faq-hero__search {
    margin-top: 0;
  }
  .page-faq .faq-board {
    padding: 72px 0 96px;
  }
  .page-faq .faq-board__inner {
    grid-template-columns: 340px 1fr;
    gap: 56px;
  }
  .page-faq .faq-aside {
    position: sticky;
    top: 96px;
  }
  .page-faq .faq-aside__figure {
    display: none;
  }
  .page-faq .faq-group__head {
    padding-top: 48px;
    margin-bottom: 24px;
  }
  .page-faq .faq-group__head:first-child {
    padding-top: 0;
  }
  .page-faq .faq-group__index {
    font-size: 26px;
  }
  .page-faq .faq-group__title {
    font-size: 30px;
  }
  .page-faq .faq-item__summary {
    padding: 24px 28px;
    gap: 18px;
  }
  .page-faq .faq-item__question {
    font-size: 18px;
  }
  .page-faq .faq-item__answer {
    grid-template-columns: 34px 1fr;
    gap: 18px;
    margin: 0 28px 28px 28px;
    padding: 20px 24px;
  }
  .page-faq .faq-item__q,
  .page-faq .faq-item__a {
    min-width: 34px;
    height: 34px;
    flex-basis: 34px;
    font-size: 17px;
  }
  .page-faq .faq-item__body p {
    font-size: 15.5px;
  }
  .page-faq .faq-morepanel {
    padding: 36px 36px;
  }
  .page-faq .faq-morepanel__title {
    font-size: 26px;
  }
}
@media (min-width: 1240px) {
  .page-faq .faq-board__inner {
    grid-template-columns: 380px 1fr;
    gap: 72px;
  }
  .page-faq .faq-aside__figure {
    display: block;
  }
}

/* 窄屏安全区 */
@media (max-width: 640px) {
  .page-faq .faq-item__answer {
    grid-template-columns: 1fr;
    gap: 4px;
  }
  .page-faq .faq-item__a {
    min-width: 26px;
    height: 26px;
    flex-basis: 26px;
    font-size: 14px;
  }
  .page-faq .faq-morepanel__actions .btn-primary,
  .page-faq .faq-morepanel__actions .btn-ghost {
    width: 100%;
  }
}
@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}