.page-faq {
  --faq-line: rgba(20, 33, 61, 0.12);
  --faq-surface: #fffdf8;
  --faq-cyan-deep: #067f70;
  --faq-ink-soft: rgba(20, 33, 61, 0.72);
  background: var(--paper);
  color: var(--paper-ink);
  font-family: var(--font-sans);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 5vw, 42px) 0 clamp(44px, 7vw, 86px);
  background:
    radial-gradient(110% 84% at 86% 4%, rgba(0, 229, 201, 0.22), transparent 58%),
    radial-gradient(88% 70% at 4% 100%, rgba(255, 107, 53, 0.16), transparent 62%),
    linear-gradient(158deg, var(--night) 0%, var(--ink) 58%, var(--mid) 100%);
  color: var(--white);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(247, 250, 255, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(247, 250, 255, 0.055) 1px, transparent 1px);
  background-size: 74px 74px;
  -webkit-mask-image: radial-gradient(100% 84% at 78% 18%, #000 6%, transparent 74%);
  mask-image: radial-gradient(100% 84% at 78% 18%, #000 6%, transparent 74%);
  pointer-events: none;
}

.page-faq .faq-hero-inner {
  position: relative;
  z-index: 1;
}

.page-faq .breadcrumb {
  margin-bottom: clamp(20px, 4vw, 38px);
}

.page-faq .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--fog);
}

.page-faq .breadcrumb-list a {
  color: var(--cyan-mist);
  text-decoration: none;
  transition: color 0.16s var(--ease-out);
}

.page-faq .breadcrumb-list a:hover,
.page-faq .breadcrumb-list a:focus-visible {
  color: var(--cyan);
}

.page-faq .breadcrumb-current {
  color: var(--white);
}

.page-faq .faq-kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--cyan);
}

.page-faq .faq-kicker-mark {
  width: 34px;
  height: 3px;
  border-radius: var(--radius-pill);
  background: var(--orange);
}

.page-faq .faq-hero h1 {
  margin: 0;
  max-width: 19ch;
  font-size: clamp(34px, 6.2vw, 64px);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.page-faq .faq-lede {
  margin: clamp(18px, 3vw, 26px) 0 0;
  max-width: 64ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: rgba(247, 250, 255, 0.78);
}

.page-faq .faq-hero-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: clamp(24px, 4vw, 36px) 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero-facts li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 10px 18px;
  border: 1px solid rgba(168, 255, 240, 0.22);
  border-radius: var(--radius-pill);
  background: rgba(6, 18, 41, 0.4);
}

.page-faq .faq-fact-num {
  font-size: 18px;
  font-weight: 700;
  color: var(--cyan);
}

.page-faq .faq-fact-label {
  font-size: 13px;
  color: rgba(247, 250, 255, 0.74);
}

/* ---------- 主体布局 ---------- */
.page-faq .faq-body {
  padding: clamp(36px, 6vw, 72px) 0 clamp(56px, 9vw, 110px);
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

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

/* ---------- 目录 ---------- */
.page-faq .faq-toc {
  padding: 20px 18px;
  border: 1px solid var(--faq-line);
  border-radius: var(--radius-card);
  background: var(--faq-surface);
  box-shadow: 0 18px 40px rgba(6, 18, 41, 0.06);
}

.page-faq .faq-toc-title {
  margin: 0 0 14px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: rgba(20, 33, 61, 0.5);
}

.page-faq .faq-toc-list {
  display: grid;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-toc-list a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 9px 11px;
  border-radius: var(--radius-sm);
  font-size: 14.5px;
  color: var(--paper-ink);
  text-decoration: none;
  transition: background 0.16s var(--ease-out), transform 0.16s var(--ease-out);
}

.page-faq .faq-toc-list a .mono {
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--faq-cyan-deep);
}

.page-faq .faq-toc-list a:hover,
.page-faq .faq-toc-list a:focus-visible {
  background: rgba(0, 229, 201, 0.14);
  transform: translateX(3px);
}

.page-faq .faq-toc-list a:focus-visible {
  outline: 2px solid var(--faq-cyan-deep);
  outline-offset: 1px;
}

.page-faq .faq-toc-foot {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-toc-link {
  font-size: 13.5px;
  color: var(--paper-ink);
  text-decoration: none;
  border-bottom: 2px solid var(--cyan);
  padding-bottom: 2px;
}

.page-faq .faq-toc-link:hover {
  color: var(--faq-cyan-deep);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: 110px;
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(40px, 6vw, 72px);
}

.page-faq .faq-group + .faq-group::before {
  content: "";
  display: block;
  height: 2px;
  margin-bottom: clamp(30px, 5vw, 48px);
  border-radius: var(--radius-pill);
  background: linear-gradient(90deg, var(--cyan), rgba(0, 229, 201, 0) 68%);
}

.page-faq .faq-group-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 14px;
  margin-bottom: 18px;
}

.page-faq .faq-group-num {
  padding: 3px 10px;
  border: 1px solid rgba(6, 127, 112, 0.32);
  border-radius: var(--radius-pill);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--faq-cyan-deep);
}

.page-faq .faq-group-title {
  flex: 1 1 auto;
  margin: 0;
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.01em;
}

.page-faq .faq-group-note {
  flex: 1 1 100%;
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--faq-ink-soft);
}

.page-faq .faq-figure {
  margin: 0 0 20px;
  border: 1px solid var(--faq-line);
  border-radius: var(--radius-card);
  overflow: hidden;
  background: var(--night);
}

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

/* ---------- 问答条目 ---------- */
.page-faq .faq-list {
  display: grid;
  gap: 12px;
}

.page-faq .faq-item {
  border: 1px solid var(--faq-line);
  border-radius: var(--radius-sm);
  background: var(--faq-surface);
  transition: border-color 0.18s var(--ease-out), box-shadow 0.18s var(--ease-out), transform 0.18s var(--ease-out);
}

.page-faq .faq-item[open] {
  border-color: var(--cyan);
  box-shadow: 0 0 0 1px rgba(0, 229, 201, 0.34), 0 16px 34px rgba(6, 18, 41, 0.08);
  transform: translateY(-2px);
}

.page-faq .faq-q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 14px;
  align-items: center;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
}

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

.page-faq .faq-q:focus-visible {
  outline: 2px solid var(--faq-cyan-deep);
  outline-offset: -2px;
  border-radius: var(--radius-sm);
}

.page-faq .faq-q-num {
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--faq-cyan-deep);
}

.page-faq .faq-item[open] .faq-q-num {
  color: var(--orange);
}

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

.page-faq .faq-q-icon::before,
.page-faq .faq-q-icon::after {
  content: "";
  position: absolute;
  border-radius: 2px;
  background: var(--paper-ink);
  transition: transform 0.18s var(--ease-out), background 0.18s var(--ease-out);
}

.page-faq .faq-q-icon::before {
  top: 8px;
  left: 0;
  width: 18px;
  height: 2px;
}

.page-faq .faq-q-icon::after {
  top: 0;
  left: 8px;
  width: 2px;
  height: 18px;
}

.page-faq .faq-item[open] .faq-q-icon::before {
  background: var(--faq-cyan-deep);
}

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

.page-faq .faq-a {
  margin: 0 18px;
  padding: 14px 0 18px;
  border-top: 1px dashed rgba(0, 229, 201, 0.4);
}

.page-faq .faq-a p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: rgba(20, 33, 61, 0.82);
}

.page-faq .faq-a p + p {
  margin-top: 10px;
}

/* ---------- 结尾 ---------- */
.page-faq .faq-outro {
  margin-top: clamp(44px, 7vw, 78px);
  padding: clamp(26px, 4vw, 44px);
  border-radius: var(--radius-card);
  background:
    radial-gradient(120% 120% at 92% 0%, rgba(0, 229, 201, 0.2), transparent 60%),
    linear-gradient(150deg, var(--night) 0%, var(--ink) 70%, var(--mid) 100%);
  color: var(--white);
}

.page-faq .faq-outro-bar {
  display: block;
  width: 52px;
  height: 4px;
  margin-bottom: 18px;
  border-radius: var(--radius-pill);
  background: var(--orange);
}

.page-faq .faq-outro-title {
  margin: 0;
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.01em;
}

.page-faq .faq-outro-text {
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(247, 250, 255, 0.78);
}

.page-faq .faq-outro-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-faq .faq-outro-links .btn--primary {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--night);
}

.page-faq .faq-outro-links .btn--ghost {
  border-color: rgba(168, 255, 240, 0.42);
  color: var(--cyan-mist);
}

.page-faq .faq-outro-links .btn--ghost:hover,
.page-faq .faq-outro-links .btn--ghost:focus-visible {
  border-color: var(--cyan);
  color: var(--white);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-list {
    gap: 14px;
  }

  .page-faq .faq-a {
    margin: 0 22px;
    padding: 16px 0 20px;
  }

  .page-faq .faq-q {
    padding: 18px 22px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(0, 264px) minmax(0, 1fr);
    gap: clamp(40px, 5vw, 76px);
  }

  .page-faq .faq-toc {
    position: sticky;
    top: 104px;
  }

  .page-faq .faq-group-note {
    flex: 1 1 62%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-toc-list a,
  .page-faq .faq-q-icon::before,
  .page-faq .faq-q-icon::after {
    transition: none;
  }

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

  .page-faq .faq-toc-list a:hover,
  .page-faq .faq-toc-list a:focus-visible {
    transform: none;
  }
}