.page-faq {
  --faq-rule: rgba(234, 246, 245, 0.12);
}

.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding-block: clamp(1.5rem, 4vw, 2.5rem) clamp(3rem, 7vw, 5rem);
  background:
    radial-gradient(120% 90% at 78% 8%, rgba(47, 243, 208, 0.10), transparent 58%),
    radial-gradient(90% 80% at 4% 96%, rgba(59, 42, 107, 0.42), transparent 62%),
    var(--deep-sea);
}

.page-faq .faq-hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.26;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.95), rgba(0, 0, 0, 0.25) 68%, transparent 100%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.95), rgba(0, 0, 0, 0.25) 68%, transparent 100%);
}

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

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.6rem, 4vw, 3rem);
  margin-top: clamp(1.4rem, 3.5vw, 2.4rem);
  align-items: center;
}

.page-faq .faq-hero__copy h1 {
  margin: 0.4rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 5vw, 3.3rem);
  line-height: 1.14;
  letter-spacing: -0.02em;
  font-weight: 900;
  color: var(--mist);
}

.page-faq .faq-hero__copy .lede {
  margin-top: 1rem;
  max-width: 46ch;
  color: var(--mist-64);
  line-height: 1.85;
  font-size: clamp(0.94rem, 1.6vw, 1.02rem);
}

.page-faq .faq-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(1rem, 3vw, 2.2rem);
  margin: clamp(1.4rem, 3vw, 2rem) 0 0;
}

.page-faq .faq-hero__stats div {
  padding-left: 0.85rem;
  border-left: 2px solid var(--sand);
}

.page-faq .faq-hero__stats dt {
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--slate);
}

.page-faq .faq-hero__stats dd {
  margin: 0.25rem 0 0;
  font-size: 0.82rem;
  color: var(--mist-86);
}

.page-faq .faq-hero__num {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--cyan);
  margin-right: 0.2rem;
}

.page-faq .faq-hero__visual {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--mist-16);
  box-shadow: var(--shadow-lift);
  background: var(--ink);
}

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

.page-faq .faq-hero__wave {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  height: 56px;
  z-index: 1;
  color: var(--cyan);
  opacity: 0.35;
  pointer-events: none;
}

/* 索引条 */
.page-faq .faq-index {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(4, 24, 31, 0.94);
  border-block: 1px solid var(--mist-10);
  backdrop-filter: blur(10px);
}

.page-faq .faq-index__inner {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.7rem var(--pad-x);
  overflow-x: auto;
  scrollbar-width: none;
}

.page-faq .faq-index__inner::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-index__label {
  flex: 0 0 auto;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--slate);
  padding-right: 0.6rem;
  border-right: 1px solid var(--mist-16);
}

.page-faq .faq-index__list {
  display: flex;
  gap: 0.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.42rem 0.9rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--mist-16);
  color: var(--mist-86);
  font-size: 0.84rem;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 0.25s var(--ease), color 0.25s var(--ease), background 0.25s var(--ease);
}

.page-faq .faq-chip:hover,
.page-faq .faq-chip:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
  background: var(--cyan-16);
}

.page-faq .faq-chip__no {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--sand);
}

/* 正文章节 */
.page-faq .faq-body {
  padding-block: clamp(2rem, 5vw, 3.5rem) clamp(3rem, 7vw, 5.5rem);
  background:
    radial-gradient(80% 60% at 100% 0%, rgba(47, 243, 208, 0.06), transparent 60%),
    var(--deep-sea);
}

.page-faq .qa-chapter {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.2rem, 3vw, 2.2rem);
  padding-block: clamp(2.2rem, 5vw, 3.4rem);
  border-top: 1px solid var(--faq-rule);
  scroll-margin-top: 120px;
}

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

.page-faq .qa-chapter__no {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(2.2rem, 6vw, 3.4rem);
  line-height: 1;
  font-weight: 700;
  color: var(--sand);
  opacity: 0.45;
}

.page-faq .qa-chapter__title {
  margin: 0.4rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.45rem, 3.4vw, 2.1rem);
  line-height: 1.2;
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--mist);
}

.page-faq .qa-chapter__lede {
  margin: 0.75rem 0 0;
  max-width: 44ch;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--mist-64);
}

.page-faq .qa-chapter__body > * + * {
  margin-top: 0.75rem;
}

.page-faq .qa-item {
  border-radius: var(--radius-md);
  border: 1px solid var(--mist-10);
  background: var(--mist-06);
  overflow: hidden;
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.page-faq .qa-item[open] {
  border-color: var(--cyan-30);
  box-shadow: inset 3px 0 0 0 var(--cyan);
}

.page-faq .qa-item summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.15rem;
  cursor: pointer;
  list-style: none;
  background: var(--ink);
  color: var(--mist);
  font-size: 0.97rem;
  font-weight: 700;
  line-height: 1.55;
  transition: color 0.25s var(--ease);
}

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

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

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

.page-faq .qa-item summary::after {
  content: "";
  flex: 0 0 auto;
  width: 10px;
  height: 10px;
  margin-top: 0.4rem;
  border-right: 2px solid var(--cyan);
  border-bottom: 2px solid var(--cyan);
  transform: rotate(45deg);
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease);
}

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

.page-faq .qa-item__answer {
  padding: 0.9rem 1.15rem 1.15rem;
  background: linear-gradient(180deg, rgba(234, 246, 245, 0.03), rgba(234, 246, 245, 0.08));
  color: var(--mist-86);
  font-size: 0.92rem;
  line-height: 1.8;
}

.page-faq .qa-item__answer p {
  margin: 0;
}

.page-faq .qa-item__answer a {
  color: var(--aqua);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .qa-item__answer a:hover {
  color: var(--cyan);
}

/* 会员档位 */
.page-faq .tier-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
}

.page-faq .tier-card {
  padding: 1.1rem 1.15rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--mist-10);
  background: var(--mist-06);
}

.page-faq .tier-card--flag {
  border-color: var(--sand-40);
  background: linear-gradient(165deg, rgba(217, 179, 108, 0.16), rgba(217, 179, 108, 0.04));
}

.page-faq .tier-card__name {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 900;
  color: var(--mist);
}

.page-faq .tier-card__tag {
  margin: 0.2rem 0 0;
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  color: var(--sand);
}

.page-faq .tier-card ul {
  list-style: none;
  margin: 0.8rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.45rem;
}

.page-faq .tier-card li {
  position: relative;
  padding-left: 0.95rem;
  font-size: 0.85rem;
  line-height: 1.65;
  color: var(--mist-64);
}

.page-faq .tier-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--cyan);
}

/* 联系支持 */
.page-faq .support-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
}

.page-faq .support-card {
  padding: 1.1rem 1.2rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--mist-10);
  background: var(--mist-06);
}

.page-faq .support-card__label {
  margin: 0;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--slate);
}

.page-faq .support-card__value {
  display: block;
  margin-top: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.98rem;
  color: var(--cyan);
  word-break: break-all;
}

.page-faq .support-card__address {
  margin: 0.4rem 0 0;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--mist-86);
  word-break: break-word;
}

.page-faq .support-card__hint {
  margin: 0.5rem 0 0;
  font-size: 0.8rem;
  line-height: 1.7;
  color: var(--mist-64);
}

.page-faq .support-note {
  margin: 1.1rem 0 0;
  padding: 0.8rem 1rem;
  border-left: 2px solid var(--coral);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: rgba(255, 107, 74, 0.08);
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--mist-86);
}

.page-faq .support-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.4rem;
}

@media (min-width: 700px) {
  .page-faq .tier-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-faq .qa-chapter__body > * + * {
    margin-top: 0.85rem;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.8fr);
  }

  .page-faq .qa-chapter {
    grid-template-columns: minmax(0, 0.4fr) minmax(0, 0.6fr);
    gap: clamp(2rem, 5vw, 4rem);
  }

  .page-faq .qa-chapter__head {
    position: sticky;
    top: 110px;
    align-self: start;
  }

  .page-faq .qa-chapter--wide {
    grid-template-columns: 1fr;
  }

  .page-faq .qa-chapter--wide .qa-chapter__head {
    position: static;
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    column-gap: 1.4rem;
    align-items: baseline;
  }

  .page-faq .qa-chapter--wide .qa-chapter__no {
    grid-row: span 2;
  }

  .page-faq .qa-chapter--wide .qa-chapter__body {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.85rem;
    align-items: start;
  }

  .page-faq .qa-chapter--wide .qa-chapter__body > * + * {
    margin-top: 0;
  }
}

@media (max-width: 520px) {
  .page-faq .faq-index__label {
    display: none;
  }

  .page-faq .support-card__value {
    font-size: 0.9rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa-item,
  .page-faq .qa-item summary::after,
  .page-faq .faq-chip {
    transition: none;
  }
}
<<<END>>>