.page-faq {
  --faq-soft: rgba(53, 225, 255, 0.12);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-intro {
  position: relative;
  overflow: hidden;
  padding: clamp(22px, 4vw, 40px) 0 clamp(30px, 5vw, 60px);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-intro::after {
  content: "";
  position: absolute;
  top: -90px;
  right: -110px;
  width: 340px;
  height: 340px;
  background: radial-gradient(circle at 35% 40%, var(--faq-soft), transparent 68%);
  pointer-events: none;
}

.page-faq .faq-intro .breadcrumb {
  position: relative;
  z-index: 1;
  margin-bottom: 22px;
}

.page-faq .faq-intro__eyebrow {
  position: relative;
  z-index: 1;
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.24em;
  color: var(--blue);
}

.page-faq .faq-intro__title {
  position: relative;
  z-index: 1;
  margin: 0 0 18px;
  max-width: 24ch;
  font-size: clamp(2.05rem, 5.4vw, 3.6rem);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-faq .faq-intro__desc {
  position: relative;
  z-index: 1;
  margin: 0;
  max-width: 68ch;
  font-size: 1rem;
  line-height: 1.68;
  color: var(--muted);
}

/* ---------- 区块骨架 ---------- */
.page-faq .faq-section {
  padding: clamp(34px, 5.5vw, 66px) 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 22px;
  margin-bottom: clamp(20px, 3vw, 30px);
}

.page-faq .faq-section__num {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 3.4vw, 2.4rem);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--blue);
}

.page-faq .faq-section__text {
  flex: 1 1 320px;
  min-width: 0;
}

.page-faq .faq-section__title {
  margin: 0 0 8px;
  font-size: clamp(1.3rem, 2.6vw, 1.85rem);
  font-weight: 800;
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-faq .faq-section__desc {
  margin: 0;
  max-width: 62ch;
  font-size: 0.95rem;
  line-height: 1.66;
  color: var(--muted);
}

/* ---------- 主题速览 ---------- */
.page-faq .faq-topics {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .topic-card {
  display: block;
  padding: 20px 18px 18px;
  background: var(--panel);
  border-top: 2px solid transparent;
  color: var(--ink);
  text-decoration: none;
  transition: background 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-faq .topic-card:hover,
.page-faq .topic-card:focus-visible {
  background: var(--panel-deep);
  border-top-color: var(--blue);
}

.page-faq .topic-card:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: -2px;
}

.page-faq .topic-card__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.45rem;
  font-weight: 600;
  line-height: 1;
  color: var(--blue);
}

.page-faq .topic-card__title {
  margin: 14px 0 7px;
  font-size: 1.04rem;
  font-weight: 700;
  line-height: 1.35;
  color: var(--ink);
}

.page-faq .topic-card__desc {
  margin: 0 0 14px;
  font-size: 0.88rem;
  line-height: 1.62;
  color: var(--muted);
}

.page-faq .topic-card__meta {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--amber);
}

/* ---------- 分栏 ---------- */
.page-faq .faq-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3.5vw, 44px);
}

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

.page-faq .faq-figure .media-frame__img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 步骤条 ---------- */
.page-faq .step-chain {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  margin: 0 0 clamp(22px, 3vw, 32px);
  padding: 0;
  list-style: none;
}

.page-faq .step-chain__item {
  padding: 14px 16px;
  background: var(--panel);
  border: 1px solid var(--line);
}

.page-faq .step-chain__num {
  display: block;
  margin-bottom: 7px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--blue);
}

.page-faq .step-chain__label {
  display: block;
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--ink);
}

/* ---------- 数据条 ---------- */
.page-faq .mini-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0 0 clamp(22px, 3vw, 34px);
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .mini-stats__item {
  padding: 16px 14px;
  background: var(--panel);
}

.page-faq .mini-stats__value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.2rem, 2.6vw, 1.7rem);
  font-weight: 600;
  line-height: 1.12;
  color: var(--blue);
}

.page-faq .mini-stats__label {
  display: block;
  margin-top: 7px;
  font-size: 0.8rem;
  line-height: 1.45;
  color: var(--muted);
}

/* ---------- 问答折叠 ---------- */
.page-faq .faq-list {
  border-top: 1px solid var(--line);
}

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

.page-faq .faq-item > summary {
  display: flex;
  align-items: flex-start;
  gap: 13px;
  padding: 17px 2px;
  font-size: 0.99rem;
  font-weight: 600;
  line-height: 1.52;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
  transition: color 0.18s var(--ease);
}

.page-faq .faq-item > summary::-webkit-details-marker {
  display: none;
}

.page-faq .faq-item > summary:hover,
.page-faq .faq-item[open] > summary {
  color: var(--blue);
}

.page-faq .faq-item > summary:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
}

.page-faq .faq-item__marker {
  position: relative;
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  margin-top: 3px;
  border: 1px solid var(--line);
  transition: border-color 0.18s var(--ease);
}

.page-faq .faq-item__marker::before,
.page-faq .faq-item__marker::after {
  content: "";
  position: absolute;
  background: var(--blue);
  transition: transform 0.18s var(--ease), opacity 0.18s var(--ease);
}

.page-faq .faq-item__marker::before {
  left: 3px;
  right: 3px;
  top: 7.5px;
  height: 1px;
}

.page-faq .faq-item__marker::after {
  top: 3px;
  bottom: 3px;
  left: 7.5px;
  width: 1px;
}

.page-faq .faq-item[open] .faq-item__marker {
  border-color: var(--blue);
}

.page-faq .faq-item[open] .faq-item__marker::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .faq-item__body {
  padding: 0 2px 20px 33px;
  font-size: 0.93rem;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-item__body p {
  margin: 0 0 0.85em;
}

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

.page-faq .faq-item__body .link-arrow {
  color: var(--blue);
}

.page-faq .faq-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: faqstep;
}

.page-faq .faq-steps li {
  position: relative;
  padding-left: 36px;
  margin-bottom: 11px;
  counter-increment: faqstep;
}

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

.page-faq .faq-steps li::before {
  content: counter(faqstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 1px;
  padding: 1px 4px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  line-height: 1.35;
  color: var(--blue);
  border: 1px solid var(--line);
}

/* ---------- 联系区块 ---------- */
.page-faq .faq-help {
  padding: clamp(40px, 6vw, 84px) 0 clamp(44px, 7vw, 92px);
  background: linear-gradient(180deg, var(--panel-deep) 0%, var(--bg) 100%);
}

.page-faq .faq-help__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 46px);
  align-items: center;
}

.page-faq .faq-help__lead {
  margin: 0 0 22px;
  max-width: 60ch;
  font-size: 0.96rem;
  line-height: 1.72;
  color: var(--muted);
}

.page-faq .help-contact {
  margin: 0 0 26px;
  border-top: 1px solid var(--line);
}

.page-faq .help-contact__row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 18px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .help-contact__label {
  flex: 0 0 92px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.page-faq .help-contact__value {
  font-family: var(--font-mono);
  font-size: 0.94rem;
  font-weight: 500;
  color: var(--ink);
  word-break: break-all;
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 22px;
}

.page-faq .faq-help__actions .link-arrow {
  color: var(--blue);
}

/* ---------- 响应式 ---------- */
@media (min-width: 600px) {
  .page-faq .faq-topics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-faq .step-chain {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0;
  }

  .page-faq .step-chain__item {
    border-right: 0;
  }

  .page-faq .step-chain__item:last-child {
    border-right: 1px solid var(--line);
  }

  .page-faq .mini-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .page-faq .faq-topics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

  .page-faq .faq-help__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }
}

@media (min-width: 1120px) {
  .page-faq .faq-intro__title {
    max-width: 26ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .topic-card,
  .page-faq .faq-item__marker,
  .page-faq .faq-item__marker::before,
  .page-faq .faq-item__marker::after {
    transition: none;
  }
}