.page-faq {
  --faq-line: rgba(31, 138, 122, 0.34);
  --faq-muted: #4A4356;
  display: block;
  background: var(--paper);
  color: var(--ink);
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-faq a:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(18px, 3.5vw, 32px) 0 clamp(28px, 5vw, 48px);
  isolation: isolate;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: -36px 0 auto 0;
  height: 280px;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(52% 100% at 16% 0%, rgba(122, 63, 242, 0.20), transparent 68%),
    radial-gradient(46% 100% at 84% 8%, rgba(31, 138, 122, 0.20), transparent 70%);
}

.page-faq .faq-hero h1 {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 5vw, 3.2rem);
  line-height: 1.18;
  letter-spacing: 0.01em;
  margin: 12px 0 16px;
  max-width: 19em;
}

.page-faq .faq-hero__lead {
  max-width: 40em;
  margin: 0 0 clamp(20px, 3vw, 30px);
  font-size: clamp(0.95rem, 2.2vw, 1.06rem);
  line-height: 1.85;
  color: var(--faq-muted);
}

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

.page-faq .faq-hero__jump a {
  display: inline-block;
  padding: 9px 16px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  color: var(--night);
  text-decoration: none;
  background: rgba(217, 164, 65, 0.16);
  border: 1px solid rgba(217, 164, 65, 0.52);
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
  transition: background 0.25s var(--ease), color 0.25s var(--ease);
}

.page-faq .faq-hero__jump a:hover {
  background: var(--gold);
  color: var(--night);
}

/* ---------- 整体两栏 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 40px);
  padding-top: clamp(24px, 4vw, 44px);
}

.page-faq .faq-index {
  border-top: 3px solid var(--faq-line);
  padding-top: 14px;
}

.page-faq .faq-index__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  color: var(--turquoise-deep);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scroll-snap-type: x proximity;
}

.page-faq .faq-index__list li {
  flex: 0 0 auto;
}

.page-faq .faq-index__link {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 132px;
  padding: 10px 12px;
  font-size: 0.9rem;
  color: var(--ink);
  text-decoration: none;
  border-left: 3px solid var(--hair-dark);
  scroll-snap-align: start;
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-faq .faq-index__link:hover {
  border-left-color: var(--vermilion);
  background: rgba(201, 58, 43, 0.07);
}

.page-faq .faq-index__count {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--sand);
}

.page-faq .faq-groups {
  display: grid;
  gap: clamp(30px, 5vw, 58px);
  min-width: 0;
}

/* ---------- 分组 ---------- */
.page-faq .faq-group__head {
  border-top: 3px solid var(--vermilion);
  padding-top: 16px;
}

.page-faq .faq-group__num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.22em;
  color: var(--gold);
}

.page-faq .faq-group h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.3rem, 3.6vw, 2rem);
  line-height: 1.28;
  margin: 6px 0 10px;
}

.page-faq .faq-group__intro {
  max-width: 36em;
  margin: 0 0 20px;
  line-height: 1.85;
  color: var(--faq-muted);
}

.page-faq .faq-group__intro a {
  color: var(--turquoise-deep);
}

/* ---------- 快速三问 ---------- */
.page-faq .faq-quick {
  padding: 14px 16px;
  margin-bottom: 22px;
  border-left: 3px solid var(--turquoise);
  background: linear-gradient(90deg, rgba(31, 138, 122, 0.12), rgba(31, 138, 122, 0));
}

.page-faq .faq-quick__label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--turquoise-deep);
}

.page-faq .faq-quick__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 9px;
  grid-template-columns: minmax(0, 1fr);
}

.page-faq .faq-quick__list a {
  font-size: 0.93rem;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid rgba(31, 138, 122, 0.45);
  padding-bottom: 2px;
}

.page-faq .faq-quick__list a:hover {
  color: var(--vermilion);
  border-bottom-color: var(--vermilion);
}

/* ---------- 问答条目 ---------- */
.page-faq .faq-list {
  margin-top: clamp(18px, 3vw, 28px);
}

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

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

.page-faq .qa summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 2px;
  cursor: pointer;
  list-style: none;
  font-size: clamp(0.98rem, 2.4vw, 1.06rem);
  font-weight: 600;
  line-height: 1.6;
}

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

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

.page-faq .qa__q {
  transition: color 0.2s var(--ease);
}

.page-faq .qa__mark {
  position: relative;
  flex: 0 0 auto;
  width: 22px;
  height: 22px;
  margin-top: 3px;
  border: 1px solid var(--turquoise);
  background: rgba(31, 138, 122, 0.08);
  clip-path: polygon(6px 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%, 0 6px);
}

.page-faq .qa__mark::before,
.page-faq .qa__mark::after {
  content: "";
  position: absolute;
  background: var(--turquoise);
  transition: transform 0.25s var(--ease), opacity 0.25s var(--ease);
}

.page-faq .qa__mark::before {
  left: 5px;
  right: 5px;
  top: 50%;
  height: 1.5px;
  transform: translateY(-50%);
}

.page-faq .qa__mark::after {
  top: 5px;
  bottom: 5px;
  left: 50%;
  width: 1.5px;
  transform: translateX(-50%);
}

.page-faq .qa[open] .qa__mark::after {
  transform: translateX(-50%) scaleY(0);
  opacity: 0;
}

.page-faq .qa[open] summary {
  color: var(--vermilion-deep);
}

.page-faq .qa__a {
  padding: 0 2px 22px;
}

.page-faq .qa__a p {
  margin: 0 0 12px;
}

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

.page-faq .qa__a a {
  color: var(--turquoise-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 深色分组 ---------- */
.page-faq .faq-group--dark {
  --faq-line: rgba(41, 224, 214, 0.22);
  --faq-muted: rgba(247, 243, 234, 0.76);
  color: var(--paper);
  padding: clamp(22px, 4vw, 40px);
  background:
    radial-gradient(120% 100% at 0% 0%, rgba(122, 63, 242, 0.30), transparent 62%),
    radial-gradient(90% 90% at 100% 100%, rgba(31, 138, 122, 0.24), transparent 62%),
    var(--night);
  clip-path: polygon(var(--cut) 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%, 0 var(--cut));
}

.page-faq .faq-group--dark .faq-group__head {
  border-top-color: var(--cyan);
}

.page-faq .faq-group--dark .faq-group__num {
  color: var(--cyan);
}

.page-faq .faq-group--dark .faq-group__intro a {
  color: var(--cyan);
}

.page-faq .faq-group--dark .faq-quick {
  border-left-color: var(--gold);
  background: linear-gradient(90deg, rgba(217, 164, 65, 0.18), rgba(217, 164, 65, 0));
}

.page-faq .faq-group--dark .faq-quick__label {
  color: var(--gold);
}

.page-faq .faq-group--dark .faq-quick__list a {
  color: var(--paper);
  border-bottom-color: rgba(41, 224, 214, 0.45);
}

.page-faq .faq-group--dark .faq-quick__list a:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-faq .faq-group--dark .qa summary:hover .qa__q,
.page-faq .faq-group--dark .qa[open] summary {
  color: var(--cyan);
}

.page-faq .faq-group--dark .qa__a {
  color: rgba(247, 243, 234, 0.88);
}

.page-faq .faq-group--dark .qa__a a {
  color: var(--cyan);
}

/* ---------- 浅色底纹分组 ---------- */
.page-faq .faq-group--tint {
  padding: clamp(20px, 3.5vw, 34px);
  background: linear-gradient(180deg, rgba(31, 138, 122, 0.10), rgba(31, 138, 122, 0));
  border-left: 4px solid var(--turquoise);
}

/* ---------- 联系渠道 ---------- */
.page-faq .faq-channels {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin: 0 0 6px;
}

.page-faq .faq-channel {
  padding: 18px;
  border: 1px solid var(--hair-dark);
  background: var(--paper);
  clip-path: polygon(var(--cut) 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%, 0 var(--cut));
}

.page-faq .faq-channel--line {
  background: linear-gradient(140deg, rgba(122, 63, 242, 0.10), rgba(41, 224, 214, 0.10));
}

.page-faq .faq-channel__kind {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--turquoise-deep);
}

.page-faq .faq-channel__value {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: clamp(0.98rem, 2.6vw, 1.1rem);
  letter-spacing: 0.02em;
  color: var(--ink);
  word-break: break-all;
}

.page-faq .faq-channel__use {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--faq-muted);
}

.page-faq .faq-cta {
  margin: clamp(20px, 3vw, 28px) 0 0;
}

/* ---------- 桌面端 ---------- */
@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: 228px minmax(0, 1fr);
    gap: clamp(34px, 4vw, 56px);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 28px;
    border-top: 0;
    border-left: 3px solid var(--faq-line);
    padding-top: 0;
    padding-left: 18px;
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    gap: 2px;
    overflow-x: visible;
  }

  .page-faq .faq-index__list li {
    flex: 1 1 auto;
  }

  .page-faq .faq-index__link {
    flex-direction: row;
    align-items: baseline;
    justify-content: space-between;
    gap: 12px;
    min-width: 0;
    padding: 9px 10px;
    border-left: 0;
    border-bottom: 1px dashed var(--hair-dark);
  }

  .page-faq .faq-index__link:hover {
    background: rgba(201, 58, 43, 0.07);
  }

  .page-faq .faq-quick__list {
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 10px 26px;
  }

  .page-faq .faq-channels {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }

  .page-faq .faq-group--tint {
    border-left-width: 6px;
  }
}

@media (min-width: 1400px) {
  .page-faq .faq-hero h1 {
    max-width: 17em;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa__mark::before,
  .page-faq .qa__mark::after,
  .page-faq .qa__q,
  .page-faq .faq-hero__jump a,
  .page-faq .faq-index__link {
    transition: none;
  }
}
<<<END>>>