.page-faq {
  --faq-gap: clamp(24px, 3.4vw, 48px);
  --faq-num-col: 3.2rem;
  --faq-hair: rgba(47, 224, 208, 0.2);
  padding-bottom: var(--space-lg);
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumbs {
  padding-top: var(--space-sm);
}

/* ---------- 首屏框景 ---------- */
.page-faq .faq-hero {
  padding-top: var(--space-sm);
}

.page-faq .faq-hero__frame {
  position: relative;
  border: 1px solid var(--line);
  background:
    radial-gradient(120% 90% at 10% 0%, rgba(47, 224, 208, 0.1), transparent 62%),
    linear-gradient(165deg, var(--panel), var(--ink) 72%);
  padding: clamp(22px, 3.4vw, 44px);
}

.page-faq .faq-hero__frame::before {
  content: "";
  position: absolute;
  inset: -5px;
  pointer-events: none;
  opacity: 0.75;
  background:
    linear-gradient(var(--cyan), var(--cyan)) left top / 18px 2px no-repeat,
    linear-gradient(var(--cyan), var(--cyan)) left top / 2px 18px no-repeat,
    linear-gradient(var(--cyan), var(--cyan)) right top / 18px 2px no-repeat,
    linear-gradient(var(--cyan), var(--cyan)) right top / 2px 18px no-repeat,
    linear-gradient(var(--cyan), var(--cyan)) left bottom / 18px 2px no-repeat,
    linear-gradient(var(--cyan), var(--cyan)) left bottom / 2px 18px no-repeat,
    linear-gradient(var(--cyan), var(--cyan)) right bottom / 18px 2px no-repeat,
    linear-gradient(var(--cyan), var(--cyan)) right bottom / 2px 18px no-repeat;
}

.page-faq .faq-hero__top {
  display: grid;
  gap: var(--faq-gap);
}

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

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-size: clamp(2.1rem, 5.4vw, 4.1rem);
  font-weight: 200;
  line-height: 1.06;
  letter-spacing: -0.03em;
  color: var(--paper);
}

.page-faq .faq-hero__lead {
  margin: 20px 0 0;
  max-width: 64ch;
  color: var(--paper);
  opacity: 0.82;
}

.page-faq .faq-hero__stats {
  list-style: none;
  margin: 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

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

.page-faq .faq-hero__media {
  margin: var(--faq-gap) 0 0;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), 0 100%);
}

.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

/* ---------- 移动端分类跳转带 ---------- */
.page-faq .faq-jump {
  display: flex;
  flex-wrap: nowrap;
  gap: 8px;
  margin-top: var(--space-sm);
  padding-bottom: 6px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-jump::-webkit-scrollbar {
  height: 3px;
}

.page-faq .faq-jump::-webkit-scrollbar-thumb {
  background: var(--line);
}

.page-faq .faq-jump a {
  flex: 0 0 auto;
  padding: 9px 14px;
  border: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.2s var(--ease), background-color 0.2s var(--ease), border-color 0.2s var(--ease);
}

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

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: var(--faq-gap);
  padding-top: var(--space-lg);
}

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

.page-faq .faq-rail {
  display: none;
}

.page-faq .faq-rail__label {
  margin: 0 0 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  color: var(--muted);
}

.page-faq .faq-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-rail__link {
  display: flex;
  gap: 12px;
  align-items: baseline;
  padding: 10px 12px;
  border-left: 2px solid transparent;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.92rem;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  color: var(--paper);
  border-left-color: var(--orange);
}

.page-faq .faq-rail__num {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: 132px;
}

.page-faq .faq-group + .faq-group {
  margin-top: var(--space-md);
}

.page-faq .faq-group__bar {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 18px;
  padding: 16px 0 14px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-group__bar::before {
  content: "";
  position: absolute;
  left: 0;
  top: -1px;
  width: clamp(48px, 12vw, 96px);
  height: 2px;
  background: linear-gradient(90deg, var(--orange), rgba(255, 122, 26, 0));
}

.page-faq .faq-group__num {
  font-family: var(--font-mono);
  font-size: clamp(1.3rem, 2.6vw, 1.9rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cyan);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 2.6vw, 2.1rem);
  font-weight: 300;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-faq .faq-group__meta {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  color: var(--muted);
}

.page-faq .faq-group__intro {
  margin: 0 0 18px;
  max-width: 68ch;
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-group__figure {
  margin: 0 0 22px;
  padding: 10px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--cyan);
  background: linear-gradient(150deg, rgba(18, 32, 58, 0.9), rgba(10, 20, 36, 0.5));
}

.page-faq .faq-group__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.page-faq .faq-group__figure figcaption {
  padding: 10px 2px 2px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  color: var(--muted);
}

/* ---------- 问答说明牌 ---------- */
.page-faq .qa-list {
  border-top: 1px solid transparent;
}

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

.page-faq .qa > summary {
  display: grid;
  grid-template-columns: var(--faq-num-col) minmax(0, 1fr) 24px;
  gap: 18px;
  align-items: start;
  padding: 18px 0;
  list-style: none;
  cursor: pointer;
}

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

.page-faq .qa > summary::marker {
  content: "";
}

.page-faq .qa > summary:focus-visible {
  outline: var(--ring);
  outline-offset: 4px;
}

.page-faq .qa__num {
  padding-top: 0.4em;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--muted);
  transition: color 0.2s var(--ease);
}

.page-faq .qa__text {
  font-size: clamp(0.98rem, 1.4vw, 1.12rem);
  font-weight: 500;
  line-height: 1.55;
  color: var(--paper);
  transition: color 0.2s var(--ease);
}

.page-faq .qa > summary:hover .qa__text {
  color: var(--cyan);
}

.page-faq .qa[open] .qa__num {
  color: var(--orange);
}

.page-faq .qa__icon {
  position: relative;
  justify-self: end;
  width: 22px;
  height: 22px;
  margin-top: 2px;
  border: 1px solid var(--line);
  transition: border-color 0.2s var(--ease);
}

.page-faq .qa__icon::before,
.page-faq .qa__icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  background: var(--cyan);
  transform: translate(-50%, -50%);
  transition: opacity 0.2s var(--ease);
}

.page-faq .qa__icon::before {
  width: 9px;
  height: 1px;
}

.page-faq .qa__icon::after {
  width: 1px;
  height: 9px;
}

.page-faq .qa[open] .qa__icon {
  border-color: var(--cyan);
}

.page-faq .qa[open] .qa__icon::after {
  opacity: 0;
}

.page-faq .qa__a {
  display: grid;
  grid-template-columns: var(--faq-num-col) minmax(0, 1fr);
  gap: 0 18px;
  padding-bottom: 26px;
  animation: faq-open 0.3s var(--ease);
}

.page-faq .qa__a > * {
  grid-column: 2;
  min-width: 0;
}

.page-faq .qa__a p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.78;
  color: var(--muted);
}

.page-faq .qa__a p + p,
.page-faq .qa__a p + .steps,
.page-faq .qa__a .steps + p {
  margin-top: 12px;
}

.page-faq .qa__note {
  border-left: 2px solid var(--orange);
  padding-left: 14px;
  color: var(--cyan-soft);
}

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

/* ---------- 步骤列表 ---------- */
.page-faq .steps {
  list-style: none;
  counter-reset: faqstep;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .steps > li {
  counter-increment: faqstep;
  position: relative;
  padding-left: 30px;
  font-size: 0.93rem;
  line-height: 1.72;
  color: var(--muted);
}

.page-faq .steps > li::before {
  content: counter(faqstep);
  position: absolute;
  left: 0;
  top: 0.22em;
  width: 18px;
  height: 18px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid var(--cyan);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 0.6rem;
  line-height: 1;
}

/* ---------- 联系块 ---------- */
.page-faq .faq-contact {
  margin-top: 20px;
  padding: clamp(20px, 3vw, 32px);
  border: 1px solid var(--line);
  border-left: 2px solid var(--orange);
  background: linear-gradient(150deg, rgba(18, 32, 58, 0.92), rgba(10, 20, 36, 0.45));
}

.page-faq .faq-contact__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-faq .faq-contact__list li {
  display: grid;
  gap: 4px;
}

.page-faq .faq-contact__k {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  color: var(--muted);
}

.page-faq .faq-contact__val {
  font-family: var(--font-mono);
  font-size: clamp(1rem, 1.6vw, 1.15rem);
  color: var(--cyan-soft);
  word-break: break-all;
}

.page-faq .faq-contact__hint {
  margin: 18px 0 22px;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 桌面端 ---------- */
@media (min-width: 1000px) {
  .page-faq .faq-hero__top {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
  }

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

  .page-faq .faq-rail {
    display: block;
    position: sticky;
    top: 132px;
    align-self: start;
  }

  .page-faq .faq-body {
    grid-template-columns: minmax(0, 3fr) minmax(0, 9fr);
    align-items: start;
  }
}

/* ---------- 窄屏 ---------- */
@media (max-width: 620px) {
  .page-faq {
    --faq-num-col: 2.2rem;
  }

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

  .page-faq .qa > summary {
    grid-template-columns: var(--faq-num-col) minmax(0, 1fr) 20px;
    gap: 12px;
    padding: 16px 0;
  }

  .page-faq .qa__a {
    grid-template-columns: var(--faq-num-col) minmax(0, 1fr);
    gap: 0 12px;
  }

  .page-faq .faq-group__meta {
    margin-left: 0;
    width: 100%;
  }
}

/* ---------- 减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .qa__a {
    animation: none;
  }

  .page-faq .qa__icon::before,
  .page-faq .qa__icon::after {
    transition: none;
  }
}