.page-faq {
  --faq-index-w: 216px;
  --faq-gap: clamp(20px, 3vw, 48px);
  --faq-card-bg: linear-gradient(180deg, rgba(16, 36, 58, .78), rgba(11, 10, 31, .88));
  display: block;
  padding-bottom: 72px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(26px, 4.6vw, 58px) 0 clamp(20px, 3vw, 34px);
  border-bottom: var(--border-print);
}

.page-faq .faq-hero .tt-crumbs {
  margin-bottom: clamp(18px, 2.6vw, 30px);
}

.page-faq .faq-eyebrow {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--amber);
}

.page-faq .faq-h1 {
  margin: 0 0 18px;
  max-width: 20ch;
  font-family: var(--font-head);
  font-size: clamp(30px, 5.4vw, 58px);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -.02em;
  color: var(--stardust);
}

.page-faq .faq-lede {
  margin: 0 0 26px;
  max-width: 46ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.78;
  color: rgba(245, 243, 255, .78);
}

.page-faq .faq-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-meta__item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border: var(--border-print);
  border-radius: 999px;
  background: rgba(16, 36, 58, .55);
  font-size: 13px;
  color: var(--mist);
}

.page-faq .faq-meta__num {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--orange);
}

/* ---------- 布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
  margin-top: clamp(28px, 4vw, 52px);
}

/* ---------- 章节 ---------- */
.page-faq .faq-chapter {
  padding-top: clamp(36px, 5.4vw, 64px);
  scroll-margin-top: 92px;
}

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

.page-faq .faq-chapter__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(12px, 2vw, 26px);
  align-items: start;
  margin-bottom: 22px;
}

.page-faq .faq-chapter__num {
  font-family: var(--font-mono);
  font-size: clamp(48px, 11vw, 96px);
  font-weight: 700;
  line-height: .86;
  letter-spacing: -.04em;
  background: var(--grad-brand);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.page-faq .faq-chapter__titles h2 {
  margin: 4px 0 8px;
  font-family: var(--font-head);
  font-size: clamp(21px, 2.9vw, 31px);
  font-weight: 800;
  line-height: 1.24;
  letter-spacing: -.01em;
  color: var(--stardust);
}

.page-faq .faq-chapter__titles p {
  margin: 0;
  max-width: 44ch;
  font-size: 15px;
  line-height: 1.72;
  color: var(--mist);
}

.page-faq .faq-chapter__figure {
  margin: 0 0 24px;
}

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

.page-faq .faq-item {
  position: relative;
  border: var(--border-print);
  border-radius: var(--radius);
  background: var(--faq-card-bg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: border-color .3s ease, box-shadow .3s ease, transform .3s ease;
}

.page-faq .faq-item::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 24px;
  height: 24px;
  background: linear-gradient(225deg, rgba(255, 209, 102, .22), rgba(255, 209, 102, 0) 62%);
  clip-path: polygon(100% 0, 0 0, 100% 100%);
  pointer-events: none;
}

.page-faq .faq-item:hover {
  transform: translateY(-3px);
  border-color: rgba(47, 182, 255, .45);
}

.page-faq .faq-item[open] {
  border-color: rgba(47, 182, 255, .7);
  box-shadow: 0 24px 52px -32px rgba(47, 182, 255, .55), var(--shadow-card);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 17px 20px;
  cursor: pointer;
  list-style: none;
  font-size: clamp(15.5px, 1.6vw, 17.5px);
  font-weight: 600;
  line-height: 1.55;
  color: var(--stardust);
  transition: color .25s ease;
}

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

.page-faq .faq-item__q::marker {
  content: "";
}

.page-faq .faq-item__q:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: -3px;
  border-radius: var(--radius);
}

.page-faq .faq-item[open] .faq-item__q {
  color: #ffffff;
}

.page-faq .faq-item__q-text {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .faq-item__mark {
  position: relative;
  flex: none;
  width: 22px;
  height: 22px;
  margin-top: 2px;
  border: 1px solid var(--mist);
  border-radius: 50%;
  transition: border-color .28s ease, background .28s ease, transform .28s ease;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 10px;
  height: 1.5px;
  border-radius: 2px;
  background: var(--blue);
  translate: -50% -50%;
  transition: transform .28s ease, background .28s ease;
}

.page-faq .faq-item__mark::after {
  transform: rotate(90deg);
}

.page-faq .faq-item[open] .faq-item__mark {
  border-color: var(--green);
  background: rgba(77, 255, 166, .12);
  transform: rotate(180deg);
}

.page-faq .faq-item[open] .faq-item__mark::before,
.page-faq .faq-item[open] .faq-item__mark::after {
  background: var(--green);
}

.page-faq .faq-item[open] .faq-item__mark::after {
  transform: rotate(90deg) scaleX(0);
}

.page-faq .faq-item__a {
  padding: 0 20px 20px 56px;
  font-size: 15.5px;
  line-height: 1.78;
  color: rgba(245, 243, 255, .82);
  animation: faq-open .28s ease both;
}

.page-faq .faq-item__a p {
  margin: 0 0 10px;
  max-width: 58ch;
}

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

.page-faq .faq-item__a a {
  color: var(--blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

@keyframes faq-open {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 步骤列表 ---------- */
.page-faq .faq-steps {
  position: relative;
  display: grid;
  gap: 10px;
  margin: 12px 0 0;
  padding: 0 0 0 22px;
  list-style: none;
}

.page-faq .faq-steps::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 8px;
  bottom: 8px;
  width: 1.5px;
  border-radius: 2px;
  background: var(--grad-brand);
}

.page-faq .faq-steps li {
  position: relative;
  font-size: 15px;
  line-height: 1.72;
  color: rgba(245, 243, 255, .8);
}

.page-faq .faq-steps li::before {
  content: "";
  position: absolute;
  left: -22px;
  top: .62em;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 3px rgba(77, 255, 166, .16);
  transform: translate(0, -50%);
}

.page-faq .faq-steps--plain {
  margin: 12px 0 16px;
}

/* ---------- 客服章节 ---------- */
.page-faq .faq-contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 36px);
  align-items: start;
  padding: clamp(20px, 2.6vw, 32px);
  border: var(--border-print);
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, rgba(58, 15, 42, .72), rgba(11, 10, 31, .9) 62%);
}

.page-faq .faq-contact__body p {
  margin: 0 0 14px;
  max-width: 50ch;
  font-size: 15.5px;
  line-height: 1.78;
  color: rgba(245, 243, 255, .84);
}

.page-faq .faq-contact__body a {
  color: var(--blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-contact__figure {
  margin: 0;
  max-width: 320px;
}

/* ---------- 侧边索引 ---------- */
.page-faq .faq-index {
  display: none;
}

/* ---------- 底部客服提示条 ---------- */
.page-faq .faq-helpbar {
  position: sticky;
  bottom: 10px;
  z-index: 5;
  margin-top: clamp(36px, 5vw, 60px);
}

.page-faq .faq-helpbar__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 18px;
  padding: 12px 16px 12px 20px;
  border: 1px solid rgba(123, 63, 242, .55);
  border-radius: var(--radius-lg);
  background: rgba(11, 10, 31, .92);
  box-shadow: 0 22px 48px -30px rgba(0, 0, 0, .98);
  backdrop-filter: blur(12px);
}

.page-faq .faq-helpbar__text {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--mist);
}

.page-faq .faq-helpbar__cta {
  flex: none;
  white-space: nowrap;
}

/* ---------- 渐显 ---------- */
.page-faq [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .6s ease, transform .6s ease;
}

.page-faq [data-reveal][data-reveal-visible] {
  opacity: 1;
  transform: none;
}

/* ---------- 中等屏 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-contact {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }

  .page-faq .faq-chapter__head {
    grid-template-columns: 128px minmax(0, 1fr);
  }

  .page-faq .faq-chapter__num {
    text-align: left;
  }
}

/* ---------- 桌面端：右侧索引栏 ---------- */
@media (min-width: 1040px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(0, 1fr) var(--faq-index-w);
    align-items: start;
  }

  .page-faq .faq-index {
    display: block;
    position: sticky;
    top: 96px;
    padding-left: 20px;
    border-left: var(--border-print);
  }

  .page-faq .faq-index__title {
    margin: 0 0 12px;
    font-family: var(--font-mono);
    font-size: 11.5px;
    letter-spacing: .18em;
    text-transform: uppercase;
    color: var(--amber);
  }

  .page-faq .faq-index__list {
    display: grid;
    gap: 2px;
    margin: 0;
    padding: 0;
    list-style: none;
  }

  .page-faq .faq-index__item {
    display: flex;
    gap: 10px;
    padding: 9px 0;
    font-size: 13.5px;
    line-height: 1.5;
    color: var(--mist);
    text-decoration: none;
    border-bottom: 1px dashed rgba(167, 159, 201, .2);
    transition: color .25s ease, padding-left .25s ease;
  }

  .page-faq .faq-index__item:hover,
  .page-faq .faq-index__item:focus-visible {
    color: var(--stardust);
    padding-left: 5px;
  }

  .page-faq .faq-index__num {
    font-family: var(--font-mono);
    font-size: 11.5px;
    color: var(--orange);
    padding-top: 2px;
  }

  .page-faq .faq-item__q {
    padding: 19px 24px;
  }

  .page-faq .faq-item__a {
    padding: 0 24px 22px 60px;
  }
}

/* ---------- 减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }

  .page-faq [data-reveal] {
    opacity: 1;
    transform: none;
  }
}

```