.page-faq {
  --faq-index-width: 300px;
  --faq-green-line: 4px solid var(--c-green);
  background: var(--c-paper);
}

/* ===== Hero 区域 ===== */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, var(--c-deep) 0%, var(--c-ocean) 62%, #0e4e6e 100%);
  color: var(--c-paper);
  padding: 32px 0 0;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 82% 12%, rgba(0, 194, 209, 0.28) 0%, transparent 42%);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  width: 130px;
  height: 220px;
  right: -28px;
  top: 18px;
  background: var(--c-orange);
  opacity: 0.16;
  transform: skewX(-14deg);
  pointer-events: none;
}

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

.page-faq .faq-hero__content {
  max-width: 820px;
  padding-top: 8px;
}

.page-faq .faq-hero__eyebrow {
  font-family: var(--f-mono);
  color: var(--c-green);
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin: 0 0 14px;
}

.page-faq .faq-hero__title {
  font-family: var(--f-head);
  font-size: clamp(42px, 7.4vw, 88px);
  line-height: 0.98;
  letter-spacing: 0.01em;
  margin: 0 0 20px;
  color: var(--c-paper);
  text-shadow: 5px 5px 0 rgba(0, 0, 0, 0.32);
}

.page-faq .faq-hero__lead {
  max-width: 680px;
  color: rgba(244, 249, 255, 0.9);
  font-size: 17px;
  line-height: 1.9;
  margin: 0;
}

.page-faq .faq-hero__keywords {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 0;
  margin: 24px 0 0;
}

.page-faq .faq-hero__keywords li {
  border: 1px solid var(--c-cyan);
  border-radius: var(--radius);
  background: rgba(0, 194, 209, 0.1);
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  padding: 7px 12px;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.page-faq .faq-hero__keywords li:hover {
  background: rgba(0, 194, 209, 0.22);
  border-color: var(--c-green);
}

.page-faq .faq-hero__keywords a {
  color: var(--c-cyan);
  text-decoration: none;
}

.page-faq .faq-hero__keywords a:hover {
  color: var(--c-green);
}

.page-faq .faq-hero__media {
  margin-top: 36px;
  border-top: 3px solid var(--c-orange);
  border-left: 3px solid var(--c-orange);
  background: var(--c-ink);
}

.page-faq .faq-hero__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq .faq-hero__caption {
  margin: 0;
  padding: 8px 14px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--c-green);
}

/* ===== 主体双栏布局 ===== */
.page-faq .faq-body {
  background: var(--c-paper);
  background-image: linear-gradient(rgba(11, 29, 58, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(11, 29, 58, 0.035) 1px, transparent 1px);
  background-size: 28px 28px;
  padding: 44px 0 64px;
}

.page-faq .faq-body__layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  align-items: start;
}

/* ===== 左栏索引 ===== */
.page-faq .faq-index__inner {
  background: var(--c-deep);
  border: 3px solid var(--c-deep);
  box-shadow: 7px 7px 0 var(--c-orange);
  padding: 22px 20px;
  color: var(--c-paper);
  position: relative;
  z-index: 2;
}

.page-faq .faq-index__kick {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--c-green);
  margin: 0 0 6px;
}

.page-faq .faq-index__title {
  font-family: var(--f-head);
  font-size: 28px;
  line-height: 1.05;
  margin: 0 0 6px;
  color: var(--c-paper);
}

.page-faq .faq-index__note {
  margin: 0 0 22px;
  font-size: 13px;
  color: rgba(244, 249, 255, 0.72);
}

.page-faq .faq-index__group {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: 20px 0 8px;
  padding-top: 12px;
  border-top: 2px solid rgba(0, 194, 209, 0.4);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--c-cyan);
}

.page-faq .faq-index__range {
  font-family: var(--f-mono);
  font-size: 11px;
  color: var(--c-muted);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 4px;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 7px 8px;
  border: 2px solid transparent;
  border-radius: var(--radius);
  text-decoration: none;
  color: rgba(244, 249, 255, 0.92);
  transition: background-color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  border-color: var(--c-green);
  background: rgba(57, 255, 136, 0.08);
  transform: translateX(4px);
  outline: none;
}

.page-faq .faq-index__num {
  font-family: var(--f-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--c-orange);
  min-width: 20px;
}

.page-faq .faq-index__label {
  font-size: 14px;
  line-height: 1.4;
}

.page-faq .faq-index__footer {
  margin-top: 24px;
  padding: 16px;
  background: var(--c-ink);
  border-left: 4px solid var(--c-green);
}

.page-faq .faq-index__footer-title {
  margin: 0 0 10px;
  font-size: 15px;
  font-weight: 700;
  color: var(--c-paper);
}

.page-faq .faq-index__btn.btn {
  width: 100%;
  justify-content: center;
}

.page-faq .faq-index__footer-note {
  margin: 10px 0 0;
  font-size: 12px;
  color: rgba(244, 249, 255, 0.7);
}

/* ===== 右侧答案区 ===== */
.page-faq .faq-answers {
  display: grid;
  gap: clamp(44px, 5vw, 72px);
  min-width: 0;
}

.page-faq .faq-group__head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 18px;
  padding-bottom: 8px;
  border-bottom: 3px solid var(--c-deep);
}

.page-faq .faq-group__letter {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  flex-shrink: 0;
  border: 3px solid var(--c-deep);
  border-radius: 50%;
  background: var(--c-orange);
  color: var(--c-paper);
  font-family: var(--f-head);
  font-size: 22px;
  box-shadow: 3px 3px 0 var(--c-deep);
}

.page-faq .faq-group__title {
  font-family: var(--f-head);
  font-size: clamp(28px, 3.6vw, 42px);
  line-height: 1;
  margin: 0;
  color: var(--c-deep);
}

.page-faq .faq-group__range {
  margin-left: auto;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-muted);
  white-space: nowrap;
}

.page-faq .faq-group__list {
  display: grid;
  gap: 18px;
}

/* ===== 单个 FAQ 卡片 ===== */
.page-faq .faq-card {
  background: #ffffff;
  border: var(--bd);
  box-shadow: var(--shadow);
  scroll-margin-top: calc(var(--ticker-h) + var(--header-h) + 20px);
  transition: box-shadow 0.2s ease, transform 0.2s ease, background-color 0.2s ease;
}

.page-faq .faq-card:hover {
  transform: translate(-1px, -1px);
  box-shadow: 8px 8px 0 var(--c-deep);
}

.page-faq .faq-card:target {
  outline: none;
  box-shadow: 6px 6px 0 var(--c-green), 0 0 0 4px rgba(57, 255, 136, 0.32);
}

.page-faq .faq-card:target .faq-card__summary {
  background: rgba(57, 255, 136, 0.08);
}

.page-faq .faq-card__summary {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 16px;
  cursor: pointer;
  transition: background-color 0.2s ease;
}

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

.page-faq .faq-card__summary:hover,
.page-faq .faq-card__summary:focus-visible {
  background: rgba(0, 194, 209, 0.06);
}

.page-faq .faq-card__summary:focus-visible {
  outline: 3px solid var(--c-cyan);
  outline-offset: -3px;
}

.page-faq .faq-card__num {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  border: 2px solid var(--c-deep);
  border-radius: 50%;
  background: var(--c-orange);
  color: var(--c-paper);
  font-family: var(--f-mono);
  font-size: 13px;
  font-weight: 700;
  box-shadow: 2px 2px 0 var(--c-deep);
}

.page-faq .faq-card__text {
  flex: 1;
  min-width: 0;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--c-content);
}

.page-faq .faq-card__icon {
  position: relative;
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.page-faq .faq-card__icon::before,
.page-faq .faq-card__icon::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--c-deep);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.page-faq .faq-card__icon::before {
  width: 14px;
  height: 2px;
  transform: translate(-50%, -50%);
}

.page-faq .faq-card__icon::after {
  width: 2px;
  height: 14px;
  transform: translate(-50%, -50%);
}

.page-faq .faq-card__detail[open] .faq-card__icon::before {
  transform: translate(-50%, -50%) rotate(180deg);
}

.page-faq .faq-card__detail[open] .faq-card__icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
  opacity: 0;
}

.page-faq .faq-card__answer {
  margin: 0 16px 0 16px;
  padding: 6px 0 18px 50px;
  border-top: 2px solid var(--c-green);
}

.page-faq .faq-card__answer p {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--c-content);
}

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

.page-faq .faq-card__answer li {
  font-size: 15px;
  line-height: 1.6;
  color: var(--c-content);
}

.page-faq .faq-card__answer a {
  color: var(--c-ocean);
  text-decoration: underline;
  text-decoration-color: var(--c-cyan);
  text-underline-offset: 3px;
}

.page-faq .faq-card__answer a:hover {
  color: var(--c-orange);
}

/* ===== 通勤模式展示卡片 ===== */
.page-faq .commute-showcase {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  padding: 14px;
  background: var(--c-deep);
  border: 3px solid var(--c-deep);
  box-shadow: 7px 7px 0 var(--c-green);
}

.page-faq .commute-showcase__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 2px solid var(--c-paper);
}

.page-faq .commute-showcase__tag {
  display: inline-block;
  margin: 0 0 10px;
  background: var(--c-orange);
  color: var(--c-paper);
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  padding: 5px 10px;
  border: 2px solid var(--c-paper);
  border-radius: var(--radius);
}

.page-faq .commute-showcase__title {
  margin: 0 0 10px;
  font-family: var(--f-head);
  font-size: 26px;
  line-height: 1.08;
  color: var(--c-paper);
}

.page-faq .commute-showcase__desc {
  margin: 0 0 18px;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(244, 249, 255, 0.88);
}

/* ===== 纯 CSS 通勤演示 ===== */
.page-faq .demo-switch__input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-faq .demo-switch__frame {
  border: 2px solid var(--c-paper);
  background: var(--c-ink);
}

.page-faq .demo-switch__label {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  cursor: pointer;
  user-select: none;
  border-bottom: 2px solid var(--c-paper);
  transition: background-color 0.2s ease;
}

.page-faq .demo-switch__label:hover {
  background: rgba(0, 194, 209, 0.12);
}

.page-faq .demo-switch__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--c-green);
  box-shadow: 0 0 0 3px rgba(57, 255, 136, 0.25);
  flex-shrink: 0;
}

.page-faq .demo-switch__label-text {
  flex: 1;
  font-size: 13px;
  font-weight: 700;
  color: var(--c-paper);
}

.page-faq .demo-switch__state {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--c-cyan);
}

.page-faq .demo-switch__state-full {
  display: inline;
}

.page-faq .demo-switch__state-compact {
  display: none;
}

.page-faq .demo-switch__input:checked ~ .demo-switch__frame .demo-switch__state-full {
  display: none;
}

.page-faq .demo-switch__input:checked ~ .demo-switch__frame .demo-switch__state-compact {
  display: inline;
}

.page-faq .demo-switch__view {
  padding: 16px;
}

.page-faq .demo-switch__view--compact {
  display: none;
}

.page-faq .demo-switch__input:checked ~ .demo-switch__frame .demo-switch__view--full {
  display: none;
}

.page-faq .demo-switch__input:checked ~ .demo-switch__frame .demo-switch__view--compact {
  display: block;
}

.page-faq .demo-switch__input:focus-visible ~ .demo-switch__frame .demo-switch__label {
  outline: 3px solid var(--c-orange);
  outline-offset: -3px;
}

.page-faq .demo-switch__appbar {
  display: flex;
  gap: 8px;
  padding-bottom: 10px;
  border-bottom: 2px solid rgba(0, 194, 209, 0.45);
}

.page-faq .demo-switch__appbar span {
  font-family: var(--f-mono);
  font-size: 11px;
  color: var(--c-cyan);
  border: 1px solid var(--c-cyan);
  padding: 4px 8px;
  border-radius: 2px;
}

.page-faq .demo-switch__appbar span:first-child {
  background: var(--c-orange);
  border-color: var(--c-orange);
  color: var(--c-paper);
}

.page-faq .demo-switch__appbar--compact {
  justify-content: space-between;
}

.page-faq .demo-switch__live {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--c-green) !important;
  border-color: var(--c-green) !important;
}

.page-faq .demo-switch__live-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--c-green);
}

.page-faq .demo-switch__rows {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .demo-switch__rows li {
  display: grid;
  grid-template-columns: 30px 1fr auto;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  background: var(--c-paper);
  border: 1px solid var(--c-paper);
}

.page-faq .demo-switch__pos {
  font-family: var(--f-mono);
  font-size: 12px;
  color: var(--c-muted);
}

.page-faq .demo-switch__team {
  font-size: 13px;
  font-weight: 700;
  color: var(--c-content);
}

.page-faq .demo-switch__rows b {
  font-family: var(--f-mono);
  font-size: 14px;
  color: var(--c-deep);
}

.page-faq .demo-switch__score {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 8px;
  margin-top: 14px;
  padding: 16px 8px;
  background: var(--c-paper);
  border: 2px solid var(--c-orange);
  border-radius: var(--radius);
}

.page-faq .demo-switch__score .demo-switch__team {
  text-align: center;
  font-size: 15px;
  color: var(--c-deep);
}

.page-faq .demo-switch__goal {
  font-family: var(--f-head);
  font-size: 26px;
  color: var(--c-orange);
  padding: 0 8px;
}

.page-faq .demo-switch__foot {
  margin: 12px 0 0;
  text-align: right;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--c-muted);
}

.page-faq .demo-switch__foot::before {
  content: "● ";
  color: var(--c-green);
}

/* ===== 桌面端增强 ===== */
@media (min-width: 640px) {
  .page-faq .faq-hero__media {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: stretch;
  }

  .page-faq .faq-hero__caption {
    writing-mode: vertical-rl;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 12px 10px;
  }

  .page-faq .faq-group__head {
    margin-bottom: 24px;
  }

  .page-faq .faq-card__summary {
    padding: 20px 22px;
  }

  .page-faq .faq-card__answer {
    margin: 0 20px 0 20px;
    padding-left: 56px;
  }

  .page-faq .commute-showcase {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
    align-items: center;
    padding: 18px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-body {
    padding: 64px 0 88px;
  }

  .page-faq .faq-body__layout {
    grid-template-columns: var(--faq-index-width) minmax(0, 1fr);
    gap: clamp(36px, 4.5vw, 64px);
  }

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

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

  .page-faq .commute-showcase {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  }
}

@media (prefers-reduced-motion: no-preference) {
  .page-faq .faq-card__detail[open] .faq-card__answer {
    animation: pageFaqFadeIn 0.32s ease;
  }

  @keyframes pageFaqFadeIn {
    from {
      opacity: 0;
      transform: translateY(-4px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
}