.page-faq {
  --faq-gap: clamp(28px, 4vw, 56px);
  --faq-radius: 20px 6px 20px 6px;
  --faq-line: var(--smoke);
  background: var(--coal);
  color: var(--bone);
  font-family: var(--font-sans);
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-faq .faq-shell {
  max-width: var(--content-max);
  margin-inline: auto;
  padding: clamp(24px, 4vw, 48px) var(--gutter) 0;
}

.page-faq a {
  color: inherit;
  text-decoration: none;
}

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

.page-faq .mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

/* 面包屑 */
.page-faq .crumb {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--muted);
  margin-bottom: clamp(18px, 3vw, 28px);
}

.page-faq .crumb a:hover {
  color: var(--lava);
}

.page-faq .crumb .crumb__sep {
  color: var(--smoke);
}

.page-faq .crumb [aria-current="page"] {
  color: var(--bone);
}

/* 首屏 */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  border-radius: 28px 8px 28px 8px;
  background:
    radial-gradient(90% 120% at 0% 0%, var(--glow), transparent 62%),
    var(--graphite);
  border: 1px solid var(--smoke);
  padding: clamp(24px, 4vw, 52px);
  display: grid;
  gap: clamp(22px, 3vw, 36px);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: auto -20% -60% -20%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--lava), var(--ember), transparent);
  transform: rotate(-3deg);
  opacity: 0.7;
}

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

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  font-size: clamp(30px, 5.6vw, 62px);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -0.02em;
  transform: skewX(-4deg);
  transform-origin: left bottom;
  color: var(--bone);
  max-width: 20ch;
}

.page-faq .faq-hero__lead {
  margin: 20px 0 0;
  max-width: 54ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.7;
  color: #cfcbc4;
}

.page-faq .faq-hero__meta {
  margin: 26px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 30px;
}

.page-faq .faq-hero__meta dt {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--muted);
  text-transform: uppercase;
}

.page-faq .faq-hero__meta dd {
  margin: 4px 0 0;
  font-size: 18px;
  color: var(--lava);
  letter-spacing: 0.02em;
}

.page-faq .faq-hero__media {
  position: relative;
  border-radius: var(--faq-radius);
  overflow: hidden;
}

.page-faq .media {
  position: relative;
  display: block;
  margin: 0;
  background: linear-gradient(120deg, var(--graphite), var(--coal));
}

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

.page-faq .media--ratio-21x9,
.page-faq .media--ratio-4x3 {
  aspect-ratio: 16 / 10;
}

.page-faq .media__plate {
  position: absolute;
  right: 0;
  bottom: 0;
  max-width: 78%;
  padding: 8px 12px;
  font-size: 12px;
  line-height: 1.5;
  color: var(--bone);
  background: rgba(42, 42, 42, 0.86);
  border-left: 2px solid var(--lava);
}

.page-faq .media__plate-label {
  display: inline-block;
  margin-right: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--signal);
}

/* 双栏骨架 */
.page-faq .faq-layout {
  margin-top: var(--faq-gap);
  display: grid;
  gap: clamp(26px, 4vw, 52px);
}

.page-faq .faq-rail {
  border-top: 1px solid var(--faq-line);
  padding-top: 18px;
}

.page-faq .faq-rail__title {
  margin: 0 0 14px;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .faq-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
  padding-bottom: 6px;
}

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

.page-faq .faq-rail__list a {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 14px;
  white-space: nowrap;
  font-size: 13px;
  color: #cfcbc4;
  background: var(--graphite);
  border: 1px solid var(--smoke);
  border-radius: 12px 4px 12px 4px;
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease), transform 0.16s var(--ease);
}

.page-faq .faq-rail__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--violet);
}

.page-faq .faq-rail__list a:hover,
.page-faq .faq-rail__list a:focus-visible {
  color: var(--bone);
  border-color: var(--signal);
  transform: translateY(-2px);
}

.page-faq .faq-rail__list a:hover .faq-rail__num,
.page-faq .faq-rail__list a:focus-visible .faq-rail__num {
  color: var(--signal);
}

.page-faq .faq-rail__note {
  display: none;
  margin: 18px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

/* 分组 */
.page-faq .faq-group {
  padding-block: clamp(24px, 3.4vw, 40px);
  border-top: 1px solid var(--faq-line);
}

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

.page-faq .section-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.page-faq .section-num {
  font-family: var(--font-mono);
  font-size: clamp(40px, 7vw, 82px);
  font-weight: 200;
  line-height: 0.9;
  color: var(--violet);
  letter-spacing: -0.02em;
}

.page-faq .section-title {
  margin: 0;
  font-size: clamp(22px, 3.4vw, 32px);
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--bone);
}

.page-faq .section-title::before {
  content: "";
  display: inline-block;
  width: 24px;
  height: 2px;
  margin-right: 12px;
  vertical-align: middle;
  background: var(--lava);
}

.page-faq .faq-group__intro {
  margin: 0 0 20px;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

/* 折叠问答 */
.page-faq .qa {
  background: var(--graphite);
  border: 1px solid var(--smoke);
  border-radius: var(--faq-radius);
  margin-bottom: 10px;
  overflow: hidden;
  transition: border-color 0.18s var(--ease), box-shadow 0.18s var(--ease);
}

.page-faq .qa summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.55;
  color: var(--bone);
}

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

.page-faq .qa summary::after {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1.1;
  color: var(--lava);
  transition: transform 0.18s var(--ease);
}

.page-faq .qa[open] {
  border-color: rgba(255, 77, 26, 0.5);
  box-shadow: 0 0 0 1px var(--glow), 0 18px 36px -28px var(--lava);
}

.page-faq .qa[open] summary::after {
  transform: rotate(45deg);
}

.page-faq .qa__body {
  margin: 0 18px 18px;
  padding-left: 14px;
  border-left: 3px solid var(--lava);
}

.page-faq .qa__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: #cfcbc4;
}

/* 排错流程 */
.page-faq .trouble {
  display: grid;
  gap: 22px;
  align-items: start;
}

.page-faq .trouble__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
  counter-reset: none;
}

.page-faq .trouble__step {
  position: relative;
  padding: 16px 18px 16px 20px;
  background: linear-gradient(100deg, rgba(110, 75, 224, 0.12), transparent 70%), var(--graphite);
  border-left: 2px solid var(--violet);
  border-radius: 4px 16px 4px 16px;
}

.page-faq .trouble__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 200;
  line-height: 1;
  color: var(--signal);
}

.page-faq .trouble__step h3 {
  margin: 8px 0 6px;
  font-size: 17px;
  font-weight: 700;
  color: var(--bone);
}

.page-faq .trouble__step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: #b9b5ae;
}

.page-faq .trouble__media {
  border-radius: var(--faq-radius);
  overflow: hidden;
}

/* 术语卡片 */
.page-faq .glossary {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .glossary__item {
  position: relative;
  padding: 20px 18px 18px;
  background: var(--coal);
  border: 1px solid var(--smoke);
  border-radius: 16px 4px 16px 4px;
  transition: transform 0.2s var(--ease), border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.page-faq .glossary__item:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 229, 199, 0.45);
  box-shadow: 0 22px 40px -32px var(--signal);
}

.page-faq .glossary__tag {
  display: inline-block;
  padding: 3px 8px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--signal);
  border: 1px solid rgba(0, 229, 199, 0.4);
  border-radius: 3px;
}

.page-faq .glossary__item h3 {
  margin: 12px 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--bone);
}

.page-faq .glossary__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: #b9b5ae;
}

/* 联系收口 */
.page-faq .faq-group--contact {
  border-top: 1px solid var(--smoke);
}

.page-faq .resolve {
  display: grid;
  gap: 18px;
  padding: clamp(20px, 3vw, 32px);
  background:
    radial-gradient(120% 140% at 100% 0%, var(--glow), transparent 60%),
    linear-gradient(160deg, var(--graphite), var(--coal));
  border-radius: 24px 8px 24px 8px;
  border: 1px solid var(--smoke);
}

.page-faq .resolve__text > p {
  margin: 0 0 18px;
  max-width: 48ch;
  font-size: 15px;
  line-height: 1.8;
  color: #cfcbc4;
}

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

.page-faq .resolve__channels li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--smoke);
  font-family: var(--font-mono);
  font-size: 14px;
}

.page-faq .resolve__key {
  font-family: var(--font-sans);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.page-faq .resolve__channels a {
  color: var(--bone);
}

.page-faq .resolve__channels a:hover {
  color: var(--lava);
}

.page-faq .resolve .btn--lava {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  font-size: 15px;
  font-weight: 700;
  color: var(--coal);
  background: linear-gradient(100deg, var(--lava), var(--ember));
  border-radius: 999px;
}

.page-faq .resolve .btn--lava:hover {
  filter: brightness(1.08);
}

.page-faq .resolve__more {
  display: grid;
  gap: 10px;
  align-content: start;
  padding-top: 6px;
  border-top: 1px solid var(--smoke);
}

.page-faq .resolve__more-title {
  margin: 8px 0 2px;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .resolve__more a {
  display: block;
  padding: 11px 14px;
  font-size: 14px;
  color: #cfcbc4;
  background: rgba(20, 20, 20, 0.6);
  border-left: 2px solid var(--smoke);
  border-radius: 2px 12px 12px 2px;
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease), transform 0.16s var(--ease);
}

.page-faq .resolve__more a:hover {
  color: var(--bone);
  border-left-color: var(--lava);
  transform: translateX(3px);
}

/* 断点 */
@media (min-width: 620px) {
  .page-faq .media--ratio-21x9 {
    aspect-ratio: 21 / 9;
  }

  .page-faq .media--ratio-4x3 {
    aspect-ratio: 4 / 3;
  }

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

  .page-faq .resolve {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    gap: 28px;
  }

  .page-faq .resolve__more {
    border-top: 0;
    border-left: 1px solid var(--smoke);
    padding-top: 0;
    padding-left: 22px;
  }

  .page-faq .qa summary {
    padding: 18px 22px;
    font-size: 16px;
  }

  .page-faq .qa__body {
    margin: 0 22px 20px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: end;
  }

  .page-faq .faq-layout {
    grid-template-columns: 208px minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 24px;
    border-top: 0;
    border-left: 1px solid var(--smoke);
    padding: 0 0 0 18px;
  }

  .page-faq .faq-rail__list {
    flex-direction: column;
    overflow: visible;
    gap: 6px;
    padding-bottom: 0;
  }

  .page-faq .faq-rail__list a {
    border: 0;
    background: transparent;
    padding: 8px 0 8px 10px;
    border-left: 2px solid transparent;
    border-radius: 0;
    white-space: normal;
  }

  .page-faq .faq-rail__list a:hover,
  .page-faq .faq-rail__list a:focus-visible {
    transform: translateX(2px);
    border-left-color: var(--signal);
    background: rgba(0, 229, 199, 0.06);
  }

  .page-faq .faq-rail__note {
    display: block;
  }

  .page-faq .trouble {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
  }

  .page-faq .glossary {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-rail__list a,
  .page-faq .qa,
  .page-faq .qa summary::after,
  .page-faq .glossary__item,
  .page-faq .resolve__more a {
    transition: none;
    transform: none;
  }
}
<<<END>>>