.page-faq {
  --faq-rail-w: 340px;
  background-color: var(--c-ink);
  color: var(--c-fog);
  font-family: var(--font-body);
  line-height: 1.7;
}

.page-faq *,
.page-faq *::before,
.page-faq *::after {
  box-sizing: border-box;
}

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

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(22px, 3.6vw, 40px) 0 clamp(40px, 6vw, 82px);
  border-bottom: 1px solid var(--c-line);
  background:
    radial-gradient(115% 85% at 92% -10%, rgba(200, 255, 61, 0.16), transparent 60%),
    linear-gradient(164deg, var(--c-ink) 0%, var(--c-ink-2) 56%, var(--c-teal) 165%);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.7;
  background-image:
    repeating-linear-gradient(90deg, rgba(111, 133, 123, 0.16) 0 1px, transparent 1px 72px),
    repeating-linear-gradient(0deg, rgba(111, 133, 123, 0.12) 0 1px, transparent 1px 72px);
}

.page-faq .faq-hero > .container {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(28px, 4vw, 44px);
  margin-top: clamp(22px, 3vw, 34px);
}

.page-faq .faq-hero__kicker {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--c-lime);
}

.page-faq .faq-hero__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: clamp(42px, 9vw, 74px);
  font-weight: 800;
  line-height: 0.95;
  letter-spacing: -0.02em;
  color: var(--c-fog);
}

.page-faq .faq-hero__sub {
  margin: 0 0 18px;
  padding-left: 12px;
  border-left: 3px solid var(--c-orange);
  font-family: var(--font-display);
  font-size: clamp(17px, 2.3vw, 23px);
  font-weight: 700;
  line-height: 1.4;
  color: var(--c-fog);
}

.page-faq .faq-hero__lead {
  margin: 0 0 26px;
  max-width: 46ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.78;
  color: var(--c-fog-dim);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-faq .faq-hero__aside {
  position: relative;
  padding: clamp(16px, 2.4vw, 24px);
  border: 1px solid var(--c-line);
  background-color: rgba(20, 53, 43, 0.62);
}

.page-faq .faq-hero__aside::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  width: 76px;
  height: 3px;
  background-color: var(--c-lime);
}

.page-faq .faq-hero__aside-label {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--c-grid);
}

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

.page-faq .faq-index__item {
  border-top: 1px solid var(--c-line);
}

.page-faq .faq-index__item:last-child {
  border-bottom: 1px solid var(--c-line);
}

.page-faq .faq-index__link {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding: 13px 6px;
  color: var(--c-fog);
  text-decoration: none;
  transition: background-color 0.25s var(--ease), transform 0.25s var(--ease), color 0.25s var(--ease);
}

.page-faq .faq-index__link:hover {
  background-color: var(--c-teal);
  color: var(--c-lime);
  transform: translateX(4px);
}

.page-faq .faq-index__link:focus-visible {
  outline: 2px solid var(--c-lime);
  outline-offset: 2px;
  background-color: var(--c-teal);
  color: var(--c-lime);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-lime);
}

.page-faq .faq-index__body {
  display: grid;
  gap: 2px;
}

.page-faq .faq-index__title {
  font-size: 16px;
  font-weight: 700;
}

.page-faq .faq-index__desc {
  font-size: 13px;
  line-height: 1.5;
  color: var(--c-fog-dim);
}

/* ---------- 章节骨架 ---------- */

.page-faq .faq-section {
  padding: clamp(44px, 7vw, 88px) 0;
  border-top: 1px solid var(--c-line);
}

.page-faq .faq-section--alt {
  background-color: var(--c-ink-2);
}

.page-faq .section-head {
  display: grid;
  gap: 10px;
  padding-bottom: clamp(20px, 3vw, 30px);
  margin-bottom: clamp(24px, 4vw, 44px);
  border-bottom: 1px solid var(--c-line);
}

.page-faq .section-head__index {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--c-lime);
}

.page-faq .section-head__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(25px, 4vw, 38px);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--c-fog);
}

.page-faq .section-head__lead {
  margin: 0;
  max-width: 64ch;
  font-size: clamp(14px, 1.5vw, 16px);
  line-height: 1.75;
  color: var(--c-fog-dim);
}

/* ---------- 预约步骤 ---------- */

.page-faq .faq-rail {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}

.page-faq .faq-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-faq .faq-steps::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 8px;
  bottom: 26px;
  width: 1px;
  background: linear-gradient(180deg, var(--c-lime) 0%, rgba(200, 255, 61, 0.12) 100%);
}

.page-faq .faq-steps__item {
  position: relative;
  padding: 0 0 26px 48px;
}

.page-faq .faq-steps__item:last-child {
  padding-bottom: 0;
}

.page-faq .faq-steps__num {
  position: absolute;
  left: 0;
  top: 0;
  width: 31px;
  height: 31px;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--c-lime);
  background-color: var(--c-ink);
  border: 1px solid var(--c-lime);
}

.page-faq .faq-steps__title {
  margin: 2px 0 6px;
  font-size: 17px;
  font-weight: 700;
  color: var(--c-fog);
}

.page-faq .faq-steps__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-fog-dim);
}

/* ---------- 折叠问答 ---------- */

.page-faq .faq-folds {
  display: grid;
  gap: 10px;
}

.page-faq .fold {
  border: 1px solid var(--c-line);
  background-color: var(--c-panel-2);
}

.page-faq .fold__head {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  width: 100%;
  padding: 16px 18px;
  border: 0;
  background: none;
  color: var(--c-fog);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.6;
  text-align: left;
  cursor: pointer;
  transition: background-color 0.22s var(--ease), color 0.22s var(--ease);
}

.page-faq .fold__head:hover {
  background-color: var(--c-teal);
  color: var(--c-lime);
}

.page-faq .fold__head:focus-visible {
  outline: 2px solid var(--c-lime);
  outline-offset: -2px;
  background-color: var(--c-teal);
  color: var(--c-lime);
}

.page-faq .fold__icon {
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  margin-top: 7px;
  border-right: 2px solid var(--c-lime);
  border-bottom: 2px solid var(--c-lime);
  transform: rotate(45deg);
  transition: transform 0.25s var(--ease);
}

.page-faq .fold__head[aria-expanded="true"] .fold__icon {
  transform: rotate(225deg);
}

.page-faq .fold__panel {
  padding: 0 18px 18px 39px;
  font-size: 14px;
  line-height: 1.78;
  color: var(--c-fog-dim);
}

.page-faq .fold__panel p {
  margin: 0;
}

/* ---------- 字段说明 ---------- */

.page-faq .faq-fields {
  display: grid;
  gap: clamp(22px, 3vw, 36px);
}

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

.page-faq .faq-figure .media-frame {
  border: 1px solid var(--c-line);
}

.page-faq .faq-figure__cap {
  display: block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-grid);
}

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

.page-faq .faq-field {
  padding: 14px 0;
  border-bottom: 1px solid var(--c-line);
}

.page-faq .faq-field:first-child {
  border-top: 1px solid var(--c-line);
}

.page-faq .faq-field__name {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 4px;
  font-size: 15px;
  font-weight: 700;
  color: var(--c-fog);
}

.page-faq .faq-field__dot {
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
}

.page-faq .faq-field__dot--lime {
  background-color: var(--c-lime);
}

.page-faq .faq-field__dot--red {
  background-color: var(--c-red);
}

.page-faq .faq-field__dot--yellow {
  background-color: var(--c-yellow);
}

.page-faq .faq-field__dot--orange {
  background-color: var(--c-orange);
}

.page-faq .faq-field__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-fog-dim);
}

/* ---------- 使用指南 ---------- */

.page-faq .faq-guide {
  display: grid;
  gap: clamp(24px, 3.4vw, 44px);
}

.page-faq .faq-guide__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  border: 1px solid var(--c-line);
  background-color: var(--c-line);
}

.page-faq .faq-guide__stat {
  display: grid;
  gap: 2px;
  padding: 14px 16px;
  background-color: var(--c-panel);
}

.page-faq .faq-guide__stat-num {
  font-family: var(--font-mono);
  font-size: 30px;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--c-lime);
}

.page-faq .faq-guide__stat-label {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--c-grid);
}

.page-faq .faq-guide__text {
  margin: 20px 0 14px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-fog-dim);
}

.page-faq .faq-guide__points {
  list-style: none;
  margin: 0 0 26px;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .faq-guide__points li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--c-fog-dim);
}

.page-faq .faq-guide__points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 9px;
  height: 1px;
  background-color: var(--c-lime);
}

/* ---------- 收藏与切换 ---------- */

.page-faq .faq-duo {
  display: grid;
  gap: clamp(16px, 2.4vw, 24px);
}

.page-faq .faq-card {
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-faq .faq-card .panel__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(19px, 2.4vw, 23px);
  font-weight: 800;
  line-height: 1.3;
  color: var(--c-fog);
}

.page-faq .faq-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--c-fog-dim);
}

/* ---------- 联系支持 ---------- */

.page-faq .faq-support {
  display: grid;
  gap: 0;
  padding: clamp(20px, 3.2vw, 36px);
  border: 1px solid var(--c-line);
  background: linear-gradient(150deg, var(--c-panel) 0%, var(--c-ink-2) 82%);
}

.page-faq .faq-support__row {
  display: grid;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid rgba(111, 133, 123, 0.28);
}

.page-faq .faq-support__row:first-child {
  padding-top: 0;
}

.page-faq .faq-support__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--c-grid);
}

.page-faq .faq-support__value {
  font-family: var(--font-mono);
  font-size: clamp(15px, 2vw, 18px);
  letter-spacing: 0.02em;
  color: var(--c-fog);
  word-break: break-word;
}

.page-faq .faq-support__row:first-child .faq-support__value {
  color: var(--c-lime);
}

.page-faq .faq-support__note {
  margin: 18px 0 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--c-fog-dim);
}

.page-faq .faq-support__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 760px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: start;
  }

  .page-faq .faq-guide__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-faq .faq-support__row {
    grid-template-columns: 132px minmax(0, 1fr);
    align-items: baseline;
    gap: 16px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-rail {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-rail__col {
    position: sticky;
    top: 88px;
  }

  .page-faq .faq-fields {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
    align-items: start;
  }

  .page-faq .faq-guide {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }
}

@media (max-width: 480px) {
  .page-faq .faq-guide__stat-num {
    font-size: 24px;
  }

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

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

  .page-faq .fold__panel {
    padding: 0 14px 16px 35px;
  }
}