.page-faq {
  background: var(--night);
  color: var(--ink);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  padding: clamp(40px, 8vw, 104px) 0 clamp(30px, 5vw, 60px);
  background:
    radial-gradient(110% 82% at 90% 0%, rgba(57, 210, 192, .16), transparent 62%),
    radial-gradient(82% 62% at 2% 16%, rgba(245, 197, 66, .13), transparent 58%),
    linear-gradient(180deg, var(--deep), var(--night) 72%);
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: calc(var(--gutter) * -0.4);
  bottom: -34px;
  width: min(320px, 44vw);
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--gold));
  transform: rotate(var(--cut));
  transform-origin: right bottom;
}

.page-faq .faq-hero h1 {
  font-size: var(--fs-xxl);
  line-height: 1.02;
  letter-spacing: -0.02em;
  font-weight: 800;
  margin: 0.32em 0 0.36em;
  max-width: 15ch;
}

.page-faq .faq-hero .lede {
  max-width: 64ch;
  color: var(--ink-dim);
  font-size: var(--fs-base);
  line-height: 1.8;
}

.page-faq .hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
}

/* ---------- 分组快速跳转 ---------- */

.page-faq .group-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 32px;
  padding: 16px 0;
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
}

.page-faq .group-nav-link {
  font-family: var(--font-mono);
  font-size: var(--fs-s);
  letter-spacing: 0.06em;
  color: var(--ink-dim);
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 2px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.page-faq .group-nav-link:hover,
.page-faq .group-nav-link:focus-visible {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

/* ---------- 通用区块节奏 ---------- */

.page-faq .section {
  padding: clamp(42px, 7vw, 88px) 0;
}

.page-faq .section-title {
  font-size: var(--fs-xl);
  line-height: 1.12;
  letter-spacing: -0.015em;
  margin: 0.2em 0 0.5em;
  max-width: 20ch;
}

.page-faq .prose {
  color: var(--ink-dim);
  font-size: var(--fs-base);
  line-height: 1.8;
  max-width: 62ch;
}

.page-faq .prose a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(57, 210, 192, .45);
}

.page-faq .prose a:hover,
.page-faq .prose a:focus-visible {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

/* ---------- 三分钟指引 ---------- */

.page-faq .start-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(30px, 5vw, 56px);
}

.page-faq .start-list {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  counter-reset: none;
}

.page-faq .start-step {
  display: grid;
  grid-template-columns: 2.4rem 1fr;
  gap: 14px;
  padding: 20px 0;
  border-bottom: 1px solid var(--hairline-soft);
}

.page-faq .start-step:first-child {
  border-top: 1px solid var(--hairline-soft);
}

.page-faq .start-num {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-variant-numeric: tabular-nums;
  color: var(--gold);
  padding-top: 0.28em;
  letter-spacing: 0.06em;
}

.page-faq .start-text h3 {
  font-size: var(--fs-m);
  margin: 0 0 0.42em;
  letter-spacing: -0.01em;
}

.page-faq .start-text p {
  margin: 0;
  color: var(--ink-dim);
  font-size: var(--fs-base);
  line-height: 1.78;
}

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

.page-faq .start-figure .figure-frame {
  border: 1px solid var(--hairline);
  background: var(--panel-soft);
  border-radius: var(--radius);
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
}

.page-faq .figure-frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq .figure-caption {
  margin-top: 12px;
  font-size: var(--fs-xs);
  letter-spacing: 0.04em;
  color: var(--ink-quiet);
  line-height: 1.7;
}

/* ---------- 问答分组 ---------- */

.page-faq .qa-group {
  padding: clamp(34px, 5vw, 62px) 0;
}

.page-faq .qa-group-head {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 8px;
}

.page-faq .qa-group-num {
  font-family: var(--font-mono);
  font-size: clamp(1.7rem, 4vw, 2.6rem);
  font-variant-numeric: tabular-nums;
  line-height: 1;
  color: var(--gold);
  letter-spacing: -0.02em;
}

.page-faq .qa-group-title {
  font-size: var(--fs-l);
  letter-spacing: -0.01em;
  margin: 0;
  white-space: nowrap;
}

.page-faq .qa-group-rule {
  flex: 1;
  height: 1px;
  min-width: 24px;
  background: linear-gradient(90deg, var(--hairline), transparent);
}

.page-faq .qa-list {
  margin-top: 14px;
}

.page-faq .qa-item {
  position: relative;
  padding-left: 18px;
  border-bottom: 1px solid var(--hairline-soft);
}

.page-faq .qa-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 26px;
  width: 3px;
  height: 0;
  background: var(--gold);
  transition: height 0.16s ease;
}

.page-faq .qa-item[open]::before {
  height: 22px;
}

.page-faq .qa-item summary {
  position: relative;
  list-style: none;
  cursor: pointer;
  padding: 22px 42px 22px 0;
  transition: color 0.18s ease;
}

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

.page-faq .qa-item summary::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 1.15rem;
  line-height: 1;
  color: var(--mist);
  transition: color 0.18s ease;
}

.page-faq .qa-item[open] summary::after {
  content: "\2212";
  color: var(--gold);
}

.page-faq .qa-item summary:hover .qa-q,
.page-faq .qa-item summary:focus-visible .qa-q {
  color: var(--gold);
}

.page-faq .qa-q {
  display: block;
  margin: 0;
  font-size: var(--fs-m);
  font-weight: 600;
  line-height: 1.5;
  letter-spacing: -0.005em;
  color: var(--ink);
  transition: color 0.18s ease;
}

.page-faq .qa-answer {
  padding: 0 4px 24px 0;
  animation: faq-unfold 0.16s ease-out;
}

.page-faq .qa-answer p {
  margin: 0;
  color: var(--ink-dim);
  font-size: var(--fs-base);
  line-height: 1.8;
}

.page-faq .qa-answer a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(57, 210, 192, .45);
}

.page-faq .qa-answer a:hover,
.page-faq .qa-answer a:focus-visible {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

@keyframes faq-unfold {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- 四步核对 ---------- */

.page-faq .faq-check {
  background: linear-gradient(180deg, var(--deep), var(--night) 30%);
  border-top: 1px solid var(--hairline-soft);
}

.page-faq .check-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(30px, 5vw, 56px);
}

.page-faq .check-figure {
  margin: 0;
  order: 2;
}

.page-faq .check-figure .figure-frame {
  border: 1px solid var(--hairline);
  background: var(--panel-soft);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-faq .check-main {
  order: 1;
}

.page-faq .check-list {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  counter-reset: none;
}

.page-faq .check-step {
  display: grid;
  grid-template-columns: 2.6rem 1fr;
  gap: 14px;
  padding: 18px 0;
  border-top: 1px solid var(--hairline-soft);
}

.page-faq .check-step:last-child {
  border-bottom: 1px solid var(--hairline-soft);
}

.page-faq .check-num {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  color: var(--cyan);
  letter-spacing: -0.02em;
  padding-top: 0.1em;
  transition: color 0.18s ease;
}

.page-faq .check-step:last-child .check-num {
  color: var(--orange);
}

.page-faq .check-body h3 {
  font-size: var(--fs-base);
  font-weight: 600;
  margin: 0 0 0.45em;
  letter-spacing: -0.005em;
}

.page-faq .check-body p {
  margin: 0;
  color: var(--ink-dim);
  font-size: var(--fs-s);
  line-height: 1.8;
}

/* ---------- 兜底引导 ---------- */

.page-faq .faq-fallback {
  padding: clamp(44px, 7vw, 92px) 0 clamp(52px, 8vw, 108px);
}

.page-faq .fallback-card {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--hairline);
  border-left: 3px solid var(--gold);
  border-radius: var(--radius);
  padding: clamp(26px, 4.5vw, 48px);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-faq .fallback-card::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 22px;
  height: 22px;
  background: var(--gold);
  opacity: 0.5;
}

.page-faq .fallback-title {
  font-size: var(--fs-l);
  line-height: 1.2;
  letter-spacing: -0.015em;
  margin: 0.2em 0 0.9em;
  max-width: 22ch;
}

.page-faq .fallback-list {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .fallback-list li {
  display: grid;
  grid-template-columns: 2.2rem 1fr;
  gap: 10px;
  align-items: baseline;
  font-size: var(--fs-s);
  line-height: 1.7;
  color: var(--ink-dim);
  padding-bottom: 10px;
  border-bottom: 1px solid var(--hairline-soft);
}

.page-faq .fallback-key {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--fs-xs);
  letter-spacing: 0.08em;
  color: var(--gold);
}

.page-faq .fallback-note {
  margin: 0 0 24px;
  font-size: var(--fs-s);
  line-height: 1.8;
  color: var(--ink-quiet);
}

.page-faq .fallback-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-faq .fallback-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px 24px;
  }
}

@media (min-width: 900px) {
  .page-faq .start-grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.78fr);
    align-items: start;
  }

  .page-faq .check-grid {
    grid-template-columns: minmax(0, 0.86fr) minmax(0, 1.14fr);
    align-items: start;
  }

  .page-faq .check-figure {
    order: 1;
    position: sticky;
    top: calc(var(--header-h) + 32px);
  }

  .page-faq .check-main {
    order: 2;
  }

  .page-faq .qa-item {
    padding-left: 26px;
  }

  .page-faq .qa-item::before {
    top: 28px;
  }

  .page-faq .qa-item[open]::before {
    height: 26px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa-item::before,
  .page-faq .qa-q,
  .page-faq .group-nav-link,
  .page-faq .check-num,
  .page-faq .qa-item summary::after {
    transition: none;
  }

  .page-faq .qa-answer {
    animation: none;
  }
}