.page-faq {
  --faq-accent: var(--green);
  color: var(--white);
  overflow-x: clip;
}

.page-faq .mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  padding: 40px 0 54px;
  background:
    radial-gradient(880px 440px at 84% -12%, rgba(61, 255, 158, 0.14), transparent 72%),
    radial-gradient(700px 400px at 4% 112%, rgba(255, 122, 47, 0.13), transparent 72%),
    var(--ink-900);
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--green), var(--orange), transparent);
  opacity: 0.55;
}

.page-faq .faq-hero__inner {
  display: grid;
  gap: 34px;
  align-items: end;
}

.page-faq .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 22px;
  font-size: 13px;
  color: var(--mist);
}

.page-faq .breadcrumb a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus-visible {
  color: var(--green);
  border-color: var(--green);
}

.page-faq .faq-hero__title {
  margin: 0 0 20px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(30px, 6.2vw, 60px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  max-width: 20ch;
  overflow-wrap: anywhere;
  background: linear-gradient(102deg, var(--white) 58%, var(--green) 96%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.page-faq .faq-hero__lead {
  margin: 0;
  max-width: 64ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--mist);
}

.page-faq .faq-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-facts__item {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 16px;
  border: 1px solid var(--edge);
  border-radius: var(--radius-pill);
  background: rgba(12, 27, 58, 0.72);
  font-size: 13px;
  line-height: 1.5;
  color: var(--mist);
}

.page-faq .faq-facts__num {
  font-size: 14px;
  font-weight: 700;
  color: var(--green);
  white-space: nowrap;
}

.page-faq .faq-hero__art {
  margin: 0;
  border: 1px solid var(--edge);
  border-radius: var(--radius-lg);
  background: var(--ink-800);
  overflow: hidden;
}

.page-faq .faq-hero__art img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  opacity: 0.92;
}

/* ---------- 主题胶囊 ---------- */

.page-faq .faq-topicbar {
  padding: 16px 0;
  border-bottom: 1px solid var(--edge-soft);
  background: rgba(5, 11, 31, 0.96);
}

.page-faq .faq-topicbar__inner {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-topicbar__inner::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-pill {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  padding: 9px 18px;
  border: 1px solid var(--edge);
  border-radius: var(--radius-pill);
  background: rgba(12, 27, 58, 0.7);
  color: var(--white);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.4;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
}

.page-faq .faq-pill:hover,
.page-faq .faq-pill:focus-visible {
  border-color: var(--green);
  color: var(--green);
  background: rgba(61, 255, 158, 0.08);
}

/* ---------- 主体布局 ---------- */

.page-faq .faq-body {
  display: grid;
  gap: 44px;
  padding-top: 56px;
  padding-bottom: 76px;
}

.page-faq .faq-main {
  min-width: 0;
}

.page-faq .faq-side {
  display: grid;
  gap: 18px;
  align-content: start;
}

/* ---------- 分组 ---------- */

.page-faq .faq-group {
  --faq-accent: var(--green);
  scroll-margin-top: 100px;
}

.page-faq .faq-group--1 { --faq-accent: var(--green); }
.page-faq .faq-group--2 { --faq-accent: var(--orange); }
.page-faq .faq-group--3 { --faq-accent: var(--amber); }
.page-faq .faq-group--4 { --faq-accent: var(--green); }

.page-faq .faq-group + .faq-group {
  margin-top: 52px;
  padding-top: 44px;
  border-top: 1px solid var(--edge-soft);
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin-bottom: 26px;
}

.page-faq .faq-group__no {
  margin: 0;
  font-size: 34px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--faq-accent);
}

.page-faq .faq-group__title {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(21px, 3.4vw, 30px);
  line-height: 1.24;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-faq .faq-group__intro {
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

.page-faq .faq-group__art {
  margin: 0;
  border: 1px solid var(--edge);
  border-radius: var(--radius-md);
  background: var(--ink-800);
  overflow: hidden;
}

.page-faq .faq-group__art img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

/* 反馈分组：深蓝绿色块 */

.page-faq .faq-group--4 {
  scroll-margin-top: 100px;
  padding: 28px 22px 30px;
  border: 1px solid rgba(61, 255, 158, 0.18);
  border-radius: var(--radius-lg);
  background: linear-gradient(158deg, rgba(6, 48, 44, 0.9), rgba(5, 11, 31, 0.72) 78%);
}

.page-faq .faq-group--4 + .faq-group {
  border-top: 0;
}

/* ---------- 手风琴 ---------- */

.page-faq .faq-qa {
  display: grid;
  gap: 12px;
}

.page-faq .faq-item {
  scroll-margin-top: 110px;
  border: 1px solid var(--edge);
  border-radius: var(--radius-md);
  background: rgba(12, 27, 58, 0.6);
  overflow: hidden;
  transition: border-color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}

.page-faq .faq-item:hover {
  border-color: rgba(138, 163, 200, 0.34);
}

.page-faq .faq-item[open] {
  border-color: var(--faq-accent);
  background: rgba(12, 27, 58, 0.94);
  box-shadow: inset 3px 0 0 var(--faq-accent);
}

.page-faq .faq-item:target {
  border-color: var(--faq-accent);
}

.page-faq .faq-item__summary {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 20px;
  cursor: pointer;
  list-style: none;
  color: var(--white);
}

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

.page-faq .faq-item__summary::after {
  content: "";
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  margin-left: 4px;
  border-right: 2px solid var(--faq-accent);
  border-bottom: 2px solid var(--faq-accent);
  transform: rotate(45deg) translate(-2px, -2px);
  transition: transform 0.2s ease;
}

.page-faq .faq-item[open] .faq-item__summary::after {
  transform: rotate(-135deg) translate(-2px, -2px);
}

.page-faq .faq-item__summary:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: -3px;
}

.page-faq .faq-item__no {
  flex: 0 0 auto;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--faq-accent);
}

.page-faq .faq-item__q {
  flex: 1 1 auto;
  min-width: 0;
  font-family: var(--font-head);
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.55;
}

.page-faq .faq-item__body {
  padding: 0 20px 22px;
  font-size: 15px;
  line-height: 1.82;
  color: var(--mist);
}

.page-faq .faq-item__body p {
  margin: 0 0 12px;
  max-width: 68ch;
}

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

.page-faq .faq-item__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

/* ---------- 侧栏 ---------- */

.page-faq .faq-side__card {
  padding: 22px 20px;
  border: 1px solid var(--edge);
  border-radius: var(--radius-md);
  background: rgba(12, 27, 58, 0.66);
}

.page-faq .faq-side__card--ask {
  background: linear-gradient(155deg, rgba(27, 18, 64, 0.9), rgba(12, 27, 58, 0.7));
}

.page-faq .faq-side__kicker {
  margin: 0 0 14px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--orange);
}

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

.page-faq .faq-side__list li {
  min-width: 0;
}

.page-faq .faq-side__note {
  margin: 0 0 16px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 底部帮助区 ---------- */

.page-faq .faq-help {
  position: relative;
  padding: 52px 0 66px;
  border-top: 1px solid var(--edge-soft);
  background:
    linear-gradient(142deg, rgba(27, 18, 64, 0.95), rgba(5, 11, 31, 0.98) 72%);
  overflow: hidden;
}

.page-faq .faq-help::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--orange), transparent);
  opacity: 0.6;
}

.page-faq .faq-help__inner {
  display: grid;
  gap: 26px;
}

.page-faq .faq-help__title {
  margin: 0 0 12px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(23px, 4vw, 38px);
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-faq .faq-help__text {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .faq-help__mail {
  color: var(--green);
  font-weight: 700;
  white-space: nowrap;
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-content: start;
}

/* ---------- 响应式 ---------- */

@media (min-width: 700px) {
  .page-faq .faq-group__head {
    grid-template-columns: auto minmax(0, 1fr);
    gap: 20px;
    align-items: start;
  }

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

  .page-faq .faq-item__summary {
    padding: 20px 24px;
  }

  .page-faq .faq-item__body {
    padding: 0 24px 24px;
  }

  .page-faq .faq-item__q {
    font-size: 16.5px;
  }

  .page-faq .faq-group--4 {
    padding: 34px 32px 34px;
  }

  .page-faq .faq-group__head--split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 320px);
    gap: 34px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding: 52px 0 66px;
  }

  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 52px;
  }

  .page-faq .faq-help__inner {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: center;
    gap: 48px;
  }

  .page-faq .faq-help__actions {
    justify-content: flex-end;
  }
}

@media (min-width: 1060px) {
  .page-faq .faq-body {
    grid-template-columns: minmax(0, 8fr) minmax(0, 3.4fr);
    gap: 60px;
    align-items: start;
  }

  .page-faq .faq-side {
    position: sticky;
    top: 96px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__summary::after,
  .page-faq .faq-pill,
  .page-faq .breadcrumb a,
  .page-faq .faq-item {
    transition: none;
  }
}