.page-faq {
  --faq-band: clamp(40px, 6vw, 78px);
  --faq-radius: clamp(18px, 2.4vw, 30px);
  background: var(--ink-900);
  color: var(--paper-bright);
  overflow-x: clip;
}

.page-faq .faq-crumbs {
  padding-top: clamp(16px, 2.6vw, 28px);
}

/* —— 首屏：分屏叙事 + 纯 CSS 分类视觉 —— */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(26px, 5vw, 64px) 0 clamp(38px, 6vw, 78px);
  background:
    radial-gradient(120% 90% at 88% -10%, rgba(84, 214, 255, 0.16), transparent 58%),
    radial-gradient(80% 70% at 4% 110%, rgba(184, 255, 61, 0.10), transparent 62%),
    var(--ink-900);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 54px);
  align-items: center;
}

.page-faq .faq-hero h1 {
  margin: 14px 0 18px;
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -0.02em;
  font-size: clamp(2.1rem, 6.4vw, 3.7rem);
  line-height: 1.08;
}

.page-faq .faq-hero .lead {
  max-width: 46ch;
  color: var(--mist);
  font-size: clamp(1rem, 1.3vw, 1.12rem);
  line-height: 1.78;
}

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

.page-faq .faq-hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin: 30px 0 0;
  padding: 18px 0 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-faq .faq-hero-stats li {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.page-faq .faq-stat-num {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--amber);
  letter-spacing: -0.03em;
}

.page-faq .faq-stat-label {
  font-size: 0.82rem;
  color: var(--mist);
}

.page-faq .faq-orbit {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 22px;
  padding: clamp(22px, 4vw, 34px);
  border-radius: var(--r-xl);
  border: 1px solid var(--line);
  background:
    radial-gradient(circle at 50% 40%, rgba(84, 214, 255, 0.16), transparent 58%),
    var(--ink-800);
  overflow: hidden;
}

.page-faq .faq-orbit::before {
  content: "";
  position: absolute;
  inset: -30%;
  background: repeating-radial-gradient(circle at 50% 40%, rgba(141, 162, 189, 0.18) 0 1px, transparent 1px 54px);
  opacity: 0.65;
  pointer-events: none;
}

.page-faq .orbit-core {
  position: relative;
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 8px;
  color: var(--lime);
}

.page-faq .orbit-core-num {
  font-size: clamp(3rem, 8vw, 4.4rem);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.05em;
}

.page-faq .orbit-core-label {
  font-size: 0.86rem;
  color: var(--paper-bright);
}

.page-faq .orbit-tags {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .orbit-tags li {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 13px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line);
  background: rgba(7, 17, 31, 0.62);
  font-size: 0.83rem;
  color: var(--paper-bright);
}

.page-faq .orbit-tags .mono {
  color: var(--amber);
  font-size: 0.72rem;
}

/* —— 暖纸画册停顿：分类索引 —— */
.page-faq .faq-index {
  padding: var(--faq-band) 0;
  background: var(--paper);
  color: var(--ink-900);
}

.page-faq .index-top {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3.5vw, 40px);
  margin-bottom: clamp(22px, 3.5vw, 38px);
  align-items: end;
}

.page-faq .index-intro h2 {
  margin: 12px 0 12px;
  color: var(--ink-900);
}

.page-faq .index-intro p {
  max-width: 52ch;
  color: rgba(15, 27, 45, 0.72);
  line-height: 1.8;
}

.page-faq .index-intro .eyebrow {
  color: rgba(15, 27, 45, 0.62);
}

.page-faq .index-figure {
  margin: 0;
  border-radius: var(--faq-radius);
  overflow: hidden;
  border: 1px solid rgba(15, 27, 45, 0.14);
}

.page-faq .index-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-faq .index-card {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas:
    "num name"
    "num desc"
    "num count";
  gap: 4px 14px;
  padding: 18px 20px;
  border-radius: var(--r-md);
  border: 1px solid rgba(15, 27, 45, 0.16);
  background: rgba(255, 248, 234, 0.55);
  color: var(--ink-900);
  text-decoration: none;
  transition: transform var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}

.page-faq .index-card:hover,
.page-faq .index-card:focus-visible {
  transform: translateY(-3px);
  border-color: rgba(15, 27, 45, 0.55);
  background: var(--paper-bright);
}

.page-faq .index-num {
  grid-area: num;
  align-self: start;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 34px;
  height: 24px;
  padding: 0 6px;
  border-radius: var(--r-pill);
  background: var(--ink-900);
  color: var(--lime);
  font-size: 0.72rem;
}

.page-faq .index-name {
  grid-area: name;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.02rem;
}

.page-faq .index-desc {
  grid-area: desc;
  font-size: 0.86rem;
  color: rgba(15, 27, 45, 0.66);
  line-height: 1.6;
}

.page-faq .index-count {
  grid-area: count;
  font-size: 0.72rem;
  color: rgba(15, 27, 45, 0.46);
}

/* —— 问答主体：左固定索引 + 右手风琴 —— */
.page-faq .faq-body {
  padding: var(--faq-band) 0;
  background:
    radial-gradient(90% 60% at 100% 0%, rgba(84, 214, 255, 0.08), transparent 60%),
    var(--ink-900);
}

.page-faq .faq-body-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3.5vw, 46px);
  align-items: start;
}

.page-faq .faq-rail {
  padding: 16px;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: var(--ink-800);
}

.page-faq .rail-title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-faq .rail-nav {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 4px;
  scrollbar-width: thin;
}

.page-faq .rail-nav a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
  padding: 9px 14px;
  border-radius: var(--r-pill);
  border: 1px solid transparent;
  color: var(--paper-bright);
  text-decoration: none;
  font-size: 0.88rem;
  white-space: nowrap;
  transition: background var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}

.page-faq .rail-nav a .mono {
  color: var(--cyan);
  font-size: 0.74rem;
}

.page-faq .rail-nav a:hover,
.page-faq .rail-nav a:focus-visible {
  background: rgba(184, 255, 61, 0.10);
  border-color: rgba(184, 255, 61, 0.42);
}

.page-faq .rail-note {
  display: none;
  margin: 14px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
  font-size: 0.78rem;
  line-height: 1.7;
  color: var(--mist);
}

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

.page-faq .faq-group {
  scroll-margin-top: 96px;
  padding-bottom: 8px;
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(28px, 4vw, 44px);
}

.page-faq .group-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 6px 14px;
  align-items: baseline;
  padding: 20px 0 12px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-group:first-child .group-head {
  border-top: 0;
  padding-top: 0;
}

.page-faq .group-num {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.04em;
  color: var(--lime);
}

.page-faq .group-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.28rem, 2.4vw, 1.72rem);
  letter-spacing: -0.01em;
  color: var(--paper-bright);
}

.page-faq .group-note {
  grid-column: 1 / -1;
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .faq-figure {
  margin: 16px 0 22px;
  border-radius: var(--faq-radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--ink-800);
}

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

.page-faq .faq-figure figcaption {
  padding: 10px 16px 12px;
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--mist);
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-list {
  border-top: 1px solid var(--line-soft);
}

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

.page-faq .qa summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 17px 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(0.98rem, 1.4vw, 1.06rem);
  line-height: 1.55;
  color: var(--paper-bright);
  transition: color var(--t-fast) var(--ease);
}

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

.page-faq .qa summary:hover {
  color: var(--lime);
}

.page-faq .qa-mark {
  flex: 0 0 auto;
  width: 7px;
  height: 7px;
  margin-top: 0.62em;
  border-radius: 50%;
  background: var(--mist);
  transition: background var(--t-fast) var(--ease), box-shadow var(--t-fast) var(--ease);
}

.page-faq .qa summary::after {
  content: "";
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  margin-left: auto;
  margin-top: 0.5em;
  border-right: 2px solid var(--mist);
  border-bottom: 2px solid var(--mist);
  transform: rotate(45deg);
  transition: transform var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.page-faq .qa[open] summary::after {
  transform: rotate(-135deg);
  border-color: var(--lime);
}

.page-faq .qa[open] .qa-mark {
  background: var(--lime);
  box-shadow: 0 0 0 4px rgba(184, 255, 61, 0.16);
}

.page-faq .qa-a {
  padding: 0 0 20px 19px;
  font-size: 0.96rem;
  line-height: 1.78;
  color: var(--mist);
}

.page-faq .qa-a p {
  margin: 0;
  max-width: 62ch;
}

.page-faq .qa-link {
  display: inline-block;
  margin-top: 10px;
  font-size: 0.86rem;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(84, 214, 255, 0.4);
  padding-bottom: 2px;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.page-faq .qa-link:hover,
.page-faq .qa-link:focus-visible {
  color: var(--lime);
  border-color: rgba(184, 255, 61, 0.6);
}

/* —— 联系：暖纸卡片落在暗场 —— */
.page-faq .faq-help {
  padding: 0 0 var(--faq-band);
  background: var(--ink-900);
}

.page-faq .help-card {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3.5vw, 42px);
  padding: clamp(24px, 4vw, 46px);
  border-radius: var(--faq-radius);
  background:
    radial-gradient(80% 100% at 100% 0%, rgba(255, 184, 77, 0.22), transparent 62%),
    var(--paper);
  color: var(--ink-900);
}

.page-faq .help-copy h2 {
  margin: 12px 0 14px;
  color: var(--ink-900);
  font-size: clamp(1.4rem, 3vw, 2rem);
}

.page-faq .help-copy p {
  max-width: 48ch;
  color: rgba(15, 27, 45, 0.74);
  line-height: 1.8;
}

.page-faq .help-copy .eyebrow {
  color: rgba(15, 27, 45, 0.6);
}

.page-faq .help-copy .btn {
  margin-top: 20px;
}

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

.page-faq .help-lines li {
  display: grid;
  gap: 3px;
  padding: 14px 16px;
  border-radius: var(--r-md);
  background: rgba(7, 17, 31, 0.06);
  border: 1px solid rgba(15, 27, 45, 0.14);
}

.page-faq .help-label {
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(15, 27, 45, 0.56);
}

.page-faq .help-value {
  font-size: clamp(0.98rem, 1.6vw, 1.16rem);
  font-weight: 700;
  color: var(--ink-900);
  word-break: break-word;
}

.page-faq .help-hint {
  font-size: 0.8rem;
  line-height: 1.6;
  color: rgba(15, 27, 45, 0.62);
}

/* —— 交叉链接 —— */
.page-faq .faq-next {
  padding: 0 0 clamp(46px, 7vw, 86px);
  background: var(--ink-800);
  border-top: 1px solid var(--line);
}

.page-faq .faq-next .eyebrow {
  display: block;
  padding-top: clamp(28px, 4vw, 46px);
  margin-bottom: 16px;
}

.page-faq .next-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-faq .next-card {
  display: grid;
  gap: 6px;
  padding: 20px 22px;
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  background: var(--ink-900);
  color: var(--paper-bright);
  text-decoration: none;
  transition: transform var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease), box-shadow var(--t-mid) var(--ease);
}

.page-faq .next-card:hover,
.page-faq .next-card:focus-visible {
  transform: translateY(-3px);
  border-color: rgba(255, 184, 77, 0.55);
  box-shadow: 0 14px 28px -18px rgba(255, 184, 77, 0.6);
}

.page-faq .next-kicker {
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--amber);
}

.page-faq .next-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.02rem;
}

.page-faq .next-desc {
  font-size: 0.86rem;
  line-height: 1.65;
  color: var(--mist);
}

@media (min-width: 620px) {
  .page-faq .index-grid,
  .page-faq .next-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-faq .orbit-tags {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-faq .next-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-faq .help-card {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero-inner {
    grid-template-columns: 1.12fr 0.88fr;
  }
  .page-faq .index-top {
    grid-template-columns: minmax(0, 1fr) 360px;
  }
  .page-faq .index-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .page-faq .faq-body-grid {
    grid-template-columns: 262px minmax(0, 1fr);
  }
  .page-faq .faq-rail {
    position: sticky;
    top: 96px;
  }
  .page-faq .rail-nav {
    display: grid;
    grid-template-columns: 1fr;
    gap: 4px;
    overflow: visible;
    padding-bottom: 0;
  }
  .page-faq .rail-nav a {
    white-space: normal;
  }
  .page-faq .rail-note {
    display: block;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .index-card,
  .page-faq .next-card,
  .page-faq .qa summary::after,
  .page-faq .qa-mark {
    transition: none;
  }
  .page-faq .index-card:hover,
  .page-faq .next-card:hover {
    transform: none;
  }
}
<<<END>>>