.page-faq {
  --faq-cut: 16px;
  --faq-gap: clamp(16px, 2.4vw, 28px);
  --faq-ink-on-paper: #0A1E3C;
  --faq-accent-on-paper: #B23A12;
  padding-block: clamp(20px, 3vw, 40px) clamp(64px, 9vw, 112px);
}

.page-faq .container {
  max-width: var(--shell-max);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  padding-block-start: clamp(18px, 3vw, 34px);
}

.page-faq .faq-hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 4vw, 40px);
}

.page-faq .faq-hero__eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-hero__title {
  margin: 0 0 18px;
  font-size: clamp(32px, 7.4vw, 62px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--text);
}

.page-faq .faq-hero__lead {
  margin: 0;
  max-width: 34em;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-search {
  align-self: end;
  display: grid;
  gap: 14px;
  padding: clamp(20px, 2.6vw, 28px);
  background: rgba(20, 44, 78, 0.66);
  border: 1px solid var(--line-strong);
  backdrop-filter: blur(14px);
  clip-path: polygon(
    var(--faq-cut) 0,
    100% 0,
    100% calc(100% - var(--faq-cut)),
    calc(100% - var(--faq-cut)) 100%,
    0 100%,
    0 var(--faq-cut)
  );
}

.page-faq .faq-search__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.page-faq .faq-search__jumps {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-jump {
  display: inline-flex;
  align-items: center;
  padding: 7px 13px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  font-size: 13px;
  line-height: 1.4;
  color: var(--text);
  text-decoration: none;
  transition: border-color 0.22s ease, color 0.22s ease, background-color 0.22s ease;
}

.page-faq .faq-jump:hover,
.page-faq .faq-jump:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(0, 229, 255, 0.08);
}

.page-faq .faq-search__hint {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 区块通用间距 ---------- */

.page-faq .faq-quick,
.page-faq .faq-steps,
.page-faq .faq-groups,
.page-faq .faq-reply,
.page-faq .faq-help {
  margin-block-start: clamp(52px, 7vw, 100px);
}

.page-faq .section-head {
  margin-bottom: clamp(20px, 3vw, 34px);
}

/* ---------- 高频问题 ---------- */

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

.page-faq .faq-quick__link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(20, 44, 78, 0.55);
  text-decoration: none;
  color: var(--text);
  transition: transform 0.24s ease, border-color 0.24s ease, box-shadow 0.24s ease;
}

.page-faq .faq-quick__link:hover,
.page-faq .faq-quick__link:focus-visible {
  transform: translateY(-4px);
  border-color: var(--cyan);
  box-shadow: var(--lift);
}

.page-faq .faq-quick__no {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--cyan);
  padding-top: 2px;
}

.page-faq .faq-quick__body {
  display: grid;
  gap: 6px;
  min-width: 0;
}

.page-faq .faq-quick__q {
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
}

.page-faq .faq-quick__a {
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 三步续看 ---------- */

.page-faq .faq-steps__track {
  position: relative;
  display: grid;
  gap: var(--faq-gap);
}

.page-faq .faq-step {
  display: grid;
  gap: 10px;
  padding: 22px 20px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(20, 44, 78, 0.66);
}

.page-faq .faq-step__no {
  font-family: var(--font-mono);
  font-size: 28px;
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--cyan);
}

.page-faq .faq-step__title {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
}

.page-faq .faq-step__body {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-step__check {
  margin: 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line-strong);
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-step__check strong {
  color: var(--ok);
  font-weight: 700;
}

.page-faq .faq-steps__figure {
  margin: clamp(24px, 3.4vw, 40px) 0 0;
}

/* ---------- 分组索引 + 问答 ---------- */

.page-faq .faq-groups__layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 3.4vw, 44px);
}

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

.page-faq .faq-index__link {
  display: grid;
  grid-template-columns: 3.2em minmax(0, 1fr);
  gap: 8px;
  align-items: baseline;
  padding: 12px 2px;
  border-bottom: 1px solid var(--line);
  color: var(--text);
  font-size: 15px;
  text-decoration: none;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--cyan);
  padding-left: 8px;
}

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

.page-faq .faq-index__link:hover .faq-index__no,
.page-faq .faq-index__link:focus-visible .faq-index__no {
  color: var(--cyan);
}

.page-faq .faq-index__figure {
  margin: clamp(22px, 3vw, 30px) 0 0;
}

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

.page-faq .faq-group {
  margin-bottom: clamp(30px, 4vw, 46px);
}

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

.page-faq .faq-group__title {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 0 0 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-strong);
  font-size: clamp(18px, 2.4vw, 23px);
  font-weight: 700;
  color: var(--text);
}

.page-faq .faq-group__no {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-faq .faq-item {
  margin-bottom: 10px;
  border: 1px solid var(--line);
  border-left: 3px solid transparent;
  border-radius: var(--radius-sm);
  background: rgba(20, 44, 78, 0.5);
  transition: border-color 0.24s ease, background-color 0.24s ease;
}

.page-faq .faq-item[open] {
  border-left-color: var(--cyan);
  background: rgba(20, 44, 78, 0.9);
}

.page-faq .faq-item__q {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 14px;
  align-items: center;
  padding: 16px 18px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--text);
  cursor: pointer;
  list-style: none;
}

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

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

.page-faq .faq-item__icon {
  position: relative;
  width: 18px;
  height: 18px;
  flex: none;
}

.page-faq .faq-item__icon::before,
.page-faq .faq-item__icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--cyan);
  transform: translateY(-50%);
}

.page-faq .faq-item__icon::after {
  transition: transform 0.28s ease, opacity 0.28s ease;
}

.page-faq .faq-item[open] .faq-item__icon::after {
  transform: translateY(-50%) rotate(90deg);
  opacity: 0;
}

.page-faq .faq-item__a {
  padding: 0 18px 18px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}

.page-faq .faq-item__a p {
  margin: 0 0 12px;
}

.page-faq .faq-item__a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 255, 0.4);
}

.page-faq .faq-item__a a:hover {
  border-bottom-color: var(--cyan);
}

@keyframes faq-drop-in {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.page-faq .faq-item[open] .faq-item__a {
  animation: faq-drop-in 0.3s ease both;
}

.page-faq .faq-item__anchor {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px dashed var(--line-strong);
}

.page-faq .faq-item__anchor:hover,
.page-faq .faq-item__anchor:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

/* ---------- 反馈说明（暖纸白阅读面板） ---------- */

.page-faq .faq-reply__panel {
  padding: clamp(26px, 4vw, 52px);
  border-radius: var(--radius);
  background: var(--paper);
  color: var(--faq-ink-on-paper);
}

.page-faq .faq-reply__eyebrow {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--faq-accent-on-paper);
}

.page-faq .faq-reply__title {
  margin: 0 0 16px;
  font-size: clamp(24px, 3.6vw, 36px);
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--faq-ink-on-paper);
}

.page-faq .faq-reply__lead {
  margin: 0 0 clamp(22px, 3vw, 32px);
  max-width: 40em;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(10, 30, 60, 0.75);
}

.page-faq .faq-reply__list {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid rgba(10, 30, 60, 0.14);
}

.page-faq .faq-reply__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 16px 0;
  border-bottom: 1px solid rgba(10, 30, 60, 0.14);
}

.page-faq .faq-reply__key {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--faq-accent-on-paper);
}

.page-faq .faq-reply__val {
  font-size: 15px;
  line-height: 1.75;
  color: var(--faq-ink-on-paper);
}

/* ---------- 转人工 ---------- */

.page-faq .faq-help__panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3.4vw, 40px);
  padding: clamp(24px, 3.6vw, 44px);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: linear-gradient(150deg, rgba(20, 44, 78, 0.94), rgba(7, 20, 41, 0.94));
}

.page-faq .faq-help__eyebrow {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--orange);
}

.page-faq .faq-help__title {
  margin: 0 0 14px;
  font-size: clamp(23px, 3.4vw, 34px);
  line-height: 1.22;
  font-weight: 800;
  color: var(--text);
}

.page-faq .faq-help__text {
  margin: 0 0 22px;
  max-width: 36em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-help__channels {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  align-content: start;
}

.page-faq .faq-help__channel {
  display: grid;
  gap: 6px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

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

.page-faq .faq-help__val {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  word-break: break-word;
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-faq .faq-quick__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-quick__list > li:first-child {
    grid-column: 1 / -1;
  }

  .page-faq .faq-reply__row {
    grid-template-columns: minmax(0, 200px) minmax(0, 1fr);
    gap: 20px;
    align-items: baseline;
  }
}

@media (min-width: 880px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
    column-gap: clamp(28px, 4vw, 64px);
  }

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

  .page-faq .faq-steps__track::before {
    content: "";
    position: absolute;
    top: 44px;
    left: 4%;
    right: 4%;
    height: 1px;
    background: linear-gradient(90deg, var(--cyan), rgba(0, 229, 255, 0.08));
    pointer-events: none;
  }

  .page-faq .faq-help__panel {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-groups__layout {
    grid-template-columns: minmax(210px, 268px) minmax(0, 1fr);
  }

  .page-faq .faq-index {
    position: sticky;
    top: 32px;
    align-self: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-quick__link,
  .page-faq .faq-jump,
  .page-faq .faq-index__link,
  .page-faq .faq-item,
  .page-faq .faq-item__icon::after {
    transition: none;
  }

  .page-faq .faq-item[open] .faq-item__a {
    animation: none;
  }

  .page-faq .faq-quick__link:hover {
    transform: none;
  }
}