.page-faq {
  --faq-line-std: rgba(37, 227, 212, 0.38);
  --faq-line-beta: rgba(255, 122, 26, 0.62);
  padding-bottom: clamp(48px, 8vw, 96px);
  background: var(--c-void);
  color: var(--c-text);
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumbs {
  padding: 20px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  display: grid;
  gap: 28px;
  padding: 26px 0 40px;
  border-bottom: 1px solid var(--c-line);
}

.page-faq .faq-hero__title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(46px, 12vw, 104px);
  line-height: 0.9;
  letter-spacing: -0.02em;
  color: var(--c-text);
}

.page-faq .faq-hero__sub {
  margin: 14px 0 0;
  max-width: 22ch;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(19px, 4.4vw, 28px);
  line-height: 1.32;
  letter-spacing: -0.01em;
  color: var(--c-std);
}

.page-faq .faq-hero__lead {
  margin: 16px 0 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--c-sub);
}

.page-faq .faq-hero__side {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 12px;
  padding: 22px 20px;
  border: 1px solid var(--c-line);
  border-radius: var(--r-panel) var(--r-panel) var(--r-panel) 6px;
  background:
    radial-gradient(130% 120% at 100% 0%, rgba(37, 227, 212, 0.14), transparent 58%),
    linear-gradient(180deg, rgba(20, 42, 74, 0.82), rgba(12, 23, 48, 0.95));
}

.page-faq .faq-hero__side .btn + .btn {
  margin-top: 0;
}

.page-faq .faq-hero__facts {
  list-style: none;
  margin: 8px 0 0;
  padding: 14px 0 0;
  border-top: 1px solid var(--c-line);
  display: grid;
  gap: 10px;
}

.page-faq .faq-hero__facts li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.65;
  color: var(--c-sub);
}

.page-faq .faq-hero__facts li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--c-ok);
}

/* ---------- 时间轴 ---------- */
.page-faq .faq-timeline {
  position: relative;
  display: grid;
  gap: 12px;
  margin-top: 40px;
}

.page-faq .faq-item {
  scroll-margin-top: 96px;
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  border-left: 3px solid var(--faq-line-std);
  border-radius: 6px var(--r-card) var(--r-card) 6px;
  transition: border-color var(--t-fast) ease, background-color var(--t-fast) ease;
}

.page-faq .faq-item:hover {
  background: var(--c-lift);
}

.page-faq .faq-item[open] {
  border-left-color: var(--faq-line-beta);
  background: var(--c-lift);
}

.page-faq .faq-item:target {
  box-shadow: 0 0 0 1px var(--c-focus);
}

/* ---------- 折叠项标题 ---------- */
.page-faq .faq-item__sum {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  outline-offset: 2px;
}

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

.page-faq .faq-item__sum::marker {
  content: "";
}

.page-faq .faq-item__sum:focus-visible {
  outline: 2px solid var(--c-focus);
  outline-offset: 2px;
  border-radius: 6px;
}

.page-faq .faq-item__no {
  flex: 0 0 auto;
  padding: 3px 7px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--c-std);
  border: 1px solid var(--faq-line-std);
  border-radius: var(--r-sm);
  transition: color var(--t-fast) ease, border-color var(--t-fast) ease, background-color var(--t-fast) ease;
}

.page-faq .faq-item[open] .faq-item__no {
  color: var(--c-beta);
  border-color: var(--faq-line-beta);
  background: rgba(255, 122, 26, 0.12);
}

.page-faq .faq-item__title {
  flex: 1 1 auto;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.45;
  color: var(--c-text);
}

.page-faq .faq-item__mark {
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  margin-bottom: 4px;
  border-right: 2px solid var(--c-muted);
  border-bottom: 2px solid var(--c-muted);
  transform: rotate(45deg);
  transition: transform var(--t-fast) ease, border-color var(--t-fast) ease;
}

.page-faq .faq-item[open] .faq-item__mark {
  transform: rotate(-135deg);
  border-color: var(--c-beta);
}

/* ---------- 折叠项内容 ---------- */
.page-faq .faq-item__body {
  padding: 18px 18px 22px;
  border-top: 1px solid var(--c-line);
}

.page-faq .faq-item__body > p {
  margin: 0 0 12px;
  max-width: 68ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--c-sub);
}

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

.page-faq .faq-note {
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-muted);
}

.page-faq .faq-inline-link {
  color: var(--c-std);
  text-decoration: none;
  border-bottom: 1px solid rgba(37, 227, 212, 0.4);
  margin-left: 4px;
}

.page-faq .faq-inline-link:hover {
  color: var(--c-focus);
  border-bottom-color: var(--c-focus);
}

.page-faq .faq-inline-link:focus-visible {
  outline: 2px solid var(--c-focus);
  outline-offset: 2px;
}

/* ---------- 三步上手 ---------- */
.page-faq .faq-steps {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
  counter-reset: none;
}

.page-faq .faq-steps__item {
  position: relative;
  padding: 18px 16px 16px;
  background: rgba(5, 11, 24, 0.6);
  border: 1px solid var(--c-line);
  border-radius: var(--r-card);
  transition: border-color var(--t-fast) ease, background-color var(--t-fast) ease;
}

.page-faq .faq-steps__item:hover {
  border-color: var(--c-focus);
  background: rgba(20, 42, 74, 0.6);
}

.page-faq .faq-steps__item::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 16px;
  width: 44px;
  height: 2px;
  background: var(--c-std);
}

.page-faq .faq-steps__item:nth-child(2)::before {
  background: var(--c-focus);
}

.page-faq .faq-steps__item:nth-child(3)::before {
  background: var(--c-beta);
}

.page-faq .faq-steps__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--c-muted);
  margin-bottom: 8px;
}

.page-faq .faq-steps__item h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--c-text);
}

.page-faq .faq-steps__item p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.72;
  color: var(--c-sub);
}

/* ---------- 图片 ---------- */
.page-faq .faq-shot {
  margin: 20px 0 0;
  border: 1px solid var(--c-line);
  border-radius: var(--r-card);
  overflow: hidden;
  background: var(--c-void);
}

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

.page-faq .faq-shot--wide img {
  aspect-ratio: 12 / 7;
}

.page-faq .faq-shot__cap {
  padding: 10px 14px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--c-muted);
  border-top: 1px solid var(--c-line);
}

/* ---------- 字段清单 ---------- */
.page-faq .faq-fields {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--c-line);
  border: 1px solid var(--c-line);
  border-radius: var(--r-card);
  overflow: hidden;
}

.page-faq .faq-fields li {
  padding: 14px 16px;
  background: var(--c-void);
}

.page-faq .faq-fields__name {
  display: block;
  margin-bottom: 5px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--c-std);
}

.page-faq .faq-fields__desc {
  display: block;
  font-size: 15px;
  line-height: 1.68;
  color: var(--c-sub);
}

/* ---------- 常见异常 ---------- */
.page-faq .faq-fixes {
  list-style: none;
  margin: 4px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .faq-fixes li {
  padding: 14px 16px;
  background: rgba(5, 11, 24, 0.62);
  border-left: 2px solid var(--c-line);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
}

.page-faq .faq-fixes strong {
  display: block;
  margin-bottom: 5px;
  font-size: 15px;
  font-weight: 650;
  color: var(--c-text);
}

.page-faq .faq-fixes p {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--c-sub);
}

/* ---------- 联系方式 ---------- */
.page-faq .faq-contact {
  display: grid;
  gap: 12px;
  margin-top: 16px;
}

.page-faq .faq-contact__card {
  padding: 16px;
  background: var(--c-void);
  border: 1px solid var(--c-line);
  border-radius: var(--r-card);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 7px;
}

.page-faq .faq-contact__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--c-muted);
}

.page-faq .faq-contact__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 15px;
  font-variant-numeric: tabular-nums;
  color: var(--c-std);
  word-break: break-all;
}

.page-faq .faq-contact__hint {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-sub);
}

.page-faq .faq-contact__card .btn {
  margin-top: 6px;
}

/* ---------- 底部入口卡 ---------- */
.page-faq .faq-cta {
  margin-top: 44px;
  padding: 26px 22px;
  display: grid;
  gap: 20px;
  border: 1px solid var(--c-line);
  border-radius: var(--r-panel) var(--r-panel) var(--r-panel) 6px;
  background:
    radial-gradient(120% 130% at 100% 0%, rgba(255, 122, 26, 0.2), transparent 56%),
    linear-gradient(160deg, var(--c-panel), var(--c-void));
}

.page-faq .faq-cta h2 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: clamp(24px, 5vw, 34px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--c-text);
}

.page-faq .faq-cta p {
  margin: 0;
  max-width: 56ch;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--c-sub);
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-item__sum {
    padding: 18px 24px;
    gap: 16px;
  }

  .page-faq .faq-item__body {
    padding: 20px 24px 26px;
  }

  .page-faq .faq-contact {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }

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

  .page-faq .faq-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
    gap: 56px;
    padding: 40px 0 60px;
  }

  .page-faq .faq-hero__side {
    padding: 26px 24px;
    position: sticky;
    top: 96px;
  }

  .page-faq .faq-timeline {
    gap: 14px;
    margin-top: 56px;
  }

  .page-faq .faq-item {
    border-radius: 6px var(--r-panel) var(--r-panel) 6px;
  }

  .page-faq .faq-item__title {
    font-size: 17px;
  }

  .page-faq .faq-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 32px;
    margin-top: 56px;
    padding: 34px 40px;
  }

  .page-faq .faq-cta__actions {
    flex-wrap: nowrap;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-item__no,
  .page-faq .faq-item__mark,
  .page-faq .faq-steps__item {
    transition: none;
  }
}