.page-faq {
  --faq-stream: 780px;
  --faq-rule: rgba(154, 174, 194, 0.22);
  display: block;
  padding-bottom: clamp(56px, 9vw, 104px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding: clamp(28px, 6vw, 60px) 0 clamp(20px, 4vw, 36px);
}

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

.page-faq .faq-hero__lead h1 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(34px, 8.5vw, 68px);
  line-height: 1.04;
  letter-spacing: -0.015em;
  color: var(--paper-100);
}

.page-faq .faq-hero__lead .lede {
  margin-top: 18px;
  max-width: 46ch;
  color: var(--text-body);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-faq .faq-hero__side {
  align-self: start;
  padding: 20px 22px;
  border-left: 3px solid var(--orange-500);
  border-radius: var(--radius-md);
  background: var(--ink-700);
}

.page-faq .faq-hero__side-label {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--slate-300);
}

.page-faq .faq-hero__side-value {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-size: var(--step-2);
  line-height: 1.2;
  color: var(--cyan-400);
}

.page-faq .faq-hero__side-note {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-body);
}

/* ---------- 章节通用 ---------- */
.page-faq .faq-block {
  padding-top: clamp(44px, 7vw, 84px);
}

.page-faq .faq-block .section-head {
  max-width: var(--faq-stream);
}

.page-faq .faq-block .coord {
  color: var(--amber-400);
}

/* ---------- 图示 ---------- */
.page-faq .faq-figure {
  margin: 30px 0 4px;
  max-width: 100%;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border-radius: var(--radius-md);
  object-fit: cover;
}

.page-faq .faq-figure .media-frame__hint {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--slate-300);
}

/* ---------- 三步路径 ---------- */
.page-faq .step-list {
  position: relative;
  margin: 34px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .step-list::before {
  content: "";
  position: absolute;
  left: 19px;
  top: 10px;
  bottom: 34px;
  width: 2px;
  background: repeating-linear-gradient(
    to bottom,
    var(--cyan-400) 0 8px,
    transparent 8px 16px
  );
  opacity: 0.45;
}

.page-faq .step-item {
  position: relative;
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 16px;
  padding-bottom: 28px;
}

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

.page-faq .step-item__no {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border: 2px solid var(--cyan-400);
  border-radius: var(--radius-pill);
  background: var(--ink-900);
  color: var(--cyan-400);
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.04em;
}

.page-faq .step-item__title {
  margin: 6px 0 8px;
  font-family: var(--font-body);
  font-size: var(--step-1);
  font-weight: 700;
  line-height: 1.4;
  color: var(--paper-100);
}

.page-faq .step-item__body p {
  margin: 0;
  font-size: var(--step-0);
  line-height: 1.85;
  color: var(--text-body);
}

.page-faq .step-item__body a {
  color: var(--cyan-400);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 问答流 ---------- */
.page-faq .faq-stream {
  max-width: var(--faq-stream);
  margin-top: 26px;
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .faq-item:first-of-type {
  border-top: 1px solid var(--faq-rule);
}

.page-faq .faq-item__q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: start;
  gap: 14px;
  padding: 20px 4px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-body);
  font-size: var(--step-1);
  font-weight: 600;
  line-height: 1.55;
  color: var(--text-body);
  transition: color 0.2s ease;
}

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

.page-faq .faq-item__q:hover,
.page-faq .faq-item[open] .faq-item__q {
  color: var(--paper-100);
}

.page-faq .faq-item__q:focus-visible {
  outline: 2px solid var(--orange-500);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

.page-faq .faq-item__no {
  padding-top: 6px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 0.06em;
  color: var(--slate-300);
  white-space: nowrap;
}

.page-faq .faq-item[open] .faq-item__no {
  color: var(--cyan-400);
}

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

.page-faq .faq-item__mark {
  width: 9px;
  height: 9px;
  margin-top: 11px;
  border-right: 2px solid var(--orange-500);
  border-bottom: 2px solid var(--orange-500);
  transform: rotate(45deg);
  transition: transform 0.28s ease, border-color 0.2s ease;
}

.page-faq .faq-item[open] .faq-item__mark {
  transform: rotate(-135deg);
  border-color: var(--cyan-400);
}

.page-faq .faq-item__answer {
  margin: 0 0 20px;
  padding: 18px 20px 20px;
  border-left: 3px solid var(--cyan-400);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  background: var(--paper-100);
  color: var(--ink-900);
  animation: faq-answer-in 0.28s ease;
}

.page-faq .faq-item__answer p {
  margin: 0;
  font-size: var(--step-0);
  line-height: 1.85;
}

.page-faq .faq-item__answer a {
  color: var(--teal-700);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 3px;
}

@keyframes faq-answer-in {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- 联系区块 ---------- */
.page-faq .ask-grid {
  display: grid;
  gap: 28px;
  margin-top: 30px;
}

.page-faq .ask-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--faq-rule);
}

.page-faq .ask-item {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 14px;
  padding: 16px 4px;
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .ask-item__no {
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.05em;
  color: var(--mint-300);
}

.page-faq .ask-item__text {
  margin: 0;
  font-size: var(--step-0);
  line-height: 1.8;
  color: var(--text-body);
}

.page-faq .ask-card {
  padding: 22px 22px 24px;
  border: 1px solid rgba(63, 224, 207, 0.28);
  border-radius: var(--radius-lg);
  background: var(--ink-700);
}

.page-faq .ask-card__label {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--amber-400);
}

.page-faq .ask-card__line {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 12px;
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-body);
}

.page-faq .ask-card__key {
  min-width: 62px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--slate-300);
}

.page-faq .ask-card__line a {
  color: var(--cyan-400);
  text-decoration: none;
  word-break: break-all;
}

.page-faq .ask-card__line a:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .ask-card__note {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px dashed rgba(154, 174, 194, 0.3);
  font-size: 13px;
  line-height: 1.75;
  color: var(--slate-300);
}

.page-faq .ask-card__note a {
  color: var(--mint-300);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 桌面端 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.72fr);
    align-items: end;
    gap: 48px;
  }

  .page-faq .faq-hero__side {
    margin-bottom: 6px;
  }

  .page-faq .step-item {
    grid-template-columns: 52px minmax(0, 1fr);
    gap: 24px;
    padding-bottom: 34px;
  }

  .page-faq .step-item__no {
    width: 44px;
    height: 44px;
  }

  .page-faq .step-list::before {
    left: 21px;
  }

  .page-faq .faq-item__q {
    padding: 24px 6px;
    gap: 20px;
  }

  .page-faq .faq-item__answer {
    margin: 0 0 24px 46px;
    padding: 22px 28px 24px;
  }

  .page-faq .ask-grid {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 0.8fr);
    align-items: start;
    gap: 44px;
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__answer {
    animation: none;
  }

  .page-faq .faq-item__mark,
  .page-faq .faq-item__q {
    transition: none;
  }
}