.page-faq {
  --faq-rule: 1px solid var(--line-500);
  position: relative;
  padding-bottom: clamp(56px, 9vw, 108px);
}

.page-faq .faq-shell {
  padding-top: clamp(18px, 3.6vw, 34px);
}

/* ---------- 面包屑 ---------- */
.page-faq .wd-crumbs {
  margin-bottom: clamp(18px, 3vw, 30px);
}

/* ---------- 首屏：对角错位色块 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(22px, 4.6vw, 48px) 0 clamp(26px, 4vw, 44px);
  border-bottom: var(--faq-rule);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -28%;
  right: -8%;
  width: min(52vw, 480px);
  height: min(52vw, 480px);
  background: linear-gradient(140deg, rgba(37, 225, 212, 0.16), rgba(37, 225, 212, 0) 64%);
  clip-path: polygon(100% 0, 6% 0, 100% 100%);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: clamp(64px, 12vw, 148px);
  height: 4px;
  background: var(--cyan);
}

.page-faq .faq-hero__title {
  position: relative;
  margin: 0 0 clamp(14px, 2.4vw, 20px);
  font-family: var(--font-display);
  font-size: clamp(2rem, 6.4vw, 4.1rem);
  font-weight: 300;
  line-height: 1.08;
  letter-spacing: -0.01em;
  color: var(--text);
  max-width: 20ch;
}

.page-faq .faq-hero__title span {
  display: block;
}

.page-faq .faq-hero__title strong {
  display: block;
  font-weight: 700;
  color: var(--cyan);
}

.page-faq .faq-hero__lead {
  position: relative;
  max-width: 64ch;
  margin: 0 0 clamp(20px, 3vw, 30px);
  font-size: clamp(1rem, 1.5vw, 1.08rem);
  line-height: 1.85;
  color: var(--text-dim);
}

/* ---------- 分组跳转 ---------- */
.page-faq .faq-jump {
  position: relative;
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding: 4px 2px 10px;
  scrollbar-width: none;
}

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

.page-faq .faq-jump__item {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 16px;
  border: 1px solid var(--line-600);
  border-radius: var(--pill);
  background: var(--ink-700);
  color: var(--text-dim);
  font-size: 0.9rem;
  text-decoration: none;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
}

.page-faq .faq-jump__item .wd-mono {
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-faq .faq-jump__item:hover,
.page-faq .faq-jump__item:focus-visible {
  color: var(--ink-900);
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-faq .faq-jump__item:hover .wd-mono,
.page-faq .faq-jump__item:focus-visible .wd-mono {
  color: var(--ink-900);
}

/* ---------- 首屏统计 ---------- */
.page-faq .faq-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(18px, 3vw, 30px) 0 0;
  padding: 0;
  background: var(--line-500);
  border: var(--faq-rule);
}

.page-faq .faq-stats__cell {
  background: var(--ink-800);
  padding: clamp(12px, 2vw, 16px) clamp(12px, 2vw, 18px);
}

.page-faq .faq-stats__cell dt {
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  color: var(--text-dim);
}

.page-faq .faq-stats__cell dd {
  margin: 6px 0 0;
  font-size: 0.92rem;
  color: var(--text);
}

.page-faq .faq-stats__cell dd .wd-mono {
  font-size: clamp(1.2rem, 3.4vw, 1.5rem);
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: 0.04em;
  margin-right: 4px;
}

/* ---------- 分组色带 ---------- */
.page-faq .faq-group {
  padding-top: clamp(34px, 6vw, 66px);
}

.page-faq .faq-band {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 18px);
  padding: 14px clamp(14px, 2vw, 20px);
  border-left: 4px solid var(--cyan);
  border-bottom: var(--faq-rule);
  background: linear-gradient(90deg, rgba(37, 225, 212, 0.12), rgba(10, 15, 44, 0) 72%);
}

.page-faq .faq-band__no {
  flex: 0 0 auto;
  font-size: clamp(1.2rem, 3.2vw, 1.75rem);
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--cyan);
  align-self: flex-start;
}

.page-faq .faq-band__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.28rem, 3.6vw, 1.9rem);
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--text);
}

.page-faq .faq-band__note {
  margin: 5px 0 0;
  font-size: 0.84rem;
  color: var(--text-dim);
}

/* ---------- 问答折叠 ---------- */
.page-faq .faq-list .wd-fold {
  border-bottom: var(--faq-rule);
}

.page-faq .faq-list .wd-fold:last-child {
  border-bottom: 0;
}

.page-faq .faq-list .wd-fold__btn {
  width: 100%;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  min-height: 44px;
  padding: 18px 4px;
  text-align: left;
  background: transparent;
  border: 0;
  cursor: pointer;
}

.page-faq .faq-q {
  font-family: var(--font-display);
  font-size: clamp(1.02rem, 2.2vw, 1.2rem);
  font-weight: 700;
  line-height: 1.45;
  letter-spacing: 0.01em;
  color: var(--text);
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-list .wd-fold__btn:hover .faq-q,
.page-faq .faq-list .wd-fold__btn:focus-visible .faq-q,
.page-faq .faq-list .wd-fold__btn[aria-expanded="true"] .faq-q {
  color: var(--cyan);
}

.page-faq .faq-list .wd-fold__btn:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

.page-faq .faq-list .wd-fold__panel {
  padding: 0 0 20px 20px;
  margin-left: 4px;
  border-left: 2px solid var(--cyan);
  max-width: 76ch;
}

.page-faq .faq-a {
  margin: 0;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--text-dim);
}

.page-faq .faq-code {
  font-family: var(--font-mono);
  font-size: 0.92em;
  letter-spacing: 0.06em;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(37, 225, 212, 0.45);
  padding-bottom: 1px;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-code:hover,
.page-faq .faq-code:focus-visible {
  color: var(--amber);
  border-color: var(--amber);
}

/* ---------- 编号速查 ---------- */
.page-faq .faq-codex {
  display: grid;
  gap: clamp(20px, 3.4vw, 30px);
  margin: clamp(22px, 4vw, 36px) 0 clamp(10px, 1.6vw, 16px);
}

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

.page-faq .faq-codex__body {
  align-self: center;
}

.page-faq .faq-codex__code {
  margin: 6px 0 18px;
  font-size: clamp(1.6rem, 5vw, 2.4rem);
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-faq .faq-codex__parts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-500);
  border: var(--faq-rule);
}

.page-faq .faq-codex__parts li {
  display: grid;
  grid-template-columns: minmax(64px, auto) 1fr;
  gap: 14px;
  align-items: baseline;
  padding: 12px 14px;
  background: var(--ink-800);
  font-size: 0.95rem;
  color: var(--text-dim);
  line-height: 1.7;
}

.page-faq .faq-codex__parts .wd-mono {
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.08em;
}

.page-faq .faq-codex__foot {
  margin: 14px 0 0;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--text-dim);
}

.page-faq .faq-codex__foot .wd-mono {
  color: var(--amber);
  font-weight: 700;
  letter-spacing: 0.06em;
}

/* ---------- 四步顺序 ---------- */
.page-faq .faq-map {
  margin: clamp(22px, 4vw, 36px) 0 0;
}

.page-faq .faq-steps {
  list-style: none;
  margin: clamp(22px, 4vw, 34px) 0 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-faq .faq-step {
  position: relative;
  padding-left: 18px;
  border-left: 2px solid var(--line-600);
}

.page-faq .faq-step__no {
  display: inline-block;
  margin-bottom: 10px;
  padding: 2px 9px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--cyan);
  border: 1px solid rgba(37, 225, 212, 0.45);
  border-radius: var(--pill);
}

.page-faq .faq-step__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
}

.page-faq .faq-step__text {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.78;
  color: var(--text-dim);
}

/* ---------- 人工通道 ---------- */
.page-faq .faq-support {
  margin-top: clamp(42px, 7vw, 80px);
  padding-top: clamp(34px, 6vw, 64px);
  border-top: 4px solid var(--cyan);
}

.page-faq .faq-support__head {
  max-width: 58ch;
  margin-bottom: clamp(24px, 4vw, 38px);
}

.page-faq .faq-support__title {
  margin: 10px 0 12px;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 4.4vw, 2.6rem);
  font-weight: 300;
  line-height: 1.2;
  color: var(--text);
}

.page-faq .faq-support__lead {
  margin: 0;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--text-dim);
}

.page-faq .faq-support__grid {
  display: grid;
  gap: 16px;
}

.page-faq .faq-channel__title {
  margin: 10px 0 14px;
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--text);
}

.page-faq .faq-channel__value {
  margin: 0 0 12px;
  font-size: clamp(1rem, 2.6vw, 1.2rem);
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--cyan);
  word-break: break-all;
}

.page-faq .faq-channel__note {
  margin: 0 0 18px;
  font-size: 0.94rem;
  line-height: 1.78;
  color: var(--text-dim);
}

.page-faq .faq-channel__copy {
  min-height: 44px;
}

.page-faq .faq-support__hint {
  margin: clamp(20px, 3.4vw, 30px) 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--amber);
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--text-dim);
  max-width: 68ch;
}

/* ---------- 相关入口 ---------- */
.page-faq .faq-next {
  margin-top: clamp(28px, 4.6vw, 46px);
  padding-top: clamp(20px, 3vw, 28px);
  border-top: var(--faq-rule);
}

.page-faq .faq-next__list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-500);
  border: var(--faq-rule);
}

.page-faq .faq-next__link {
  display: block;
  min-height: 44px;
  padding: 14px 16px;
  background: var(--ink-800);
  color: var(--text);
  font-size: 0.96rem;
  text-decoration: none;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .faq-next__link:hover,
.page-faq .faq-next__link:focus-visible {
  background: var(--wash);
  color: var(--cyan);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-support__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }

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

@media (min-width: 860px) {
  .page-faq .faq-codex {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    align-items: center;
    gap: clamp(28px, 4vw, 54px);
  }

  .page-faq .faq-codex__figure {
    order: 2;
  }

  .page-faq .faq-codex__body {
    order: 1;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0;
  }

  .page-faq .faq-step {
    padding: 0 20px;
    border-left: 1px solid var(--line-500);
  }

  .page-faq .faq-step:first-child {
    padding-left: 0;
    border-left: 0;
  }

  .page-faq .faq-step::before {
    content: "";
    position: absolute;
    top: 12px;
    left: -11px;
    width: 22px;
    height: 1px;
    background: var(--cyan);
    transform: rotate(-30deg);
    transform-origin: left center;
  }

  .page-faq .faq-step:first-child::before {
    display: none;
  }
}

@media (min-width: 1100px) {
  .page-faq .faq-list .wd-fold__btn {
    padding: 20px 6px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-jump__item,
  .page-faq .faq-q,
  .page-faq .faq-code,
  .page-faq .faq-next__link {
    transition: none;
  }
}