.page-faq {
  --faq-index-width: 260px;
  --faq-sticky-top: 96px;
  background: var(--ink-900);
  color: var(--text);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding-top: 20px;
  background: linear-gradient(180deg, var(--ink-850) 0%, var(--ink-900) 100%);
  border-bottom: 1px solid var(--border-dark);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    90deg,
    rgba(199, 210, 220, 0.055) 0 1px,
    transparent 1px 72px
  );
  pointer-events: none;
}

.page-faq .faq-hero > .shell {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero .breadcrumb {
  margin-bottom: 24px;
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: 28px;
  padding-bottom: 32px;
}

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

.page-faq .faq-hero .eyebrow {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan);
  text-transform: uppercase;
  margin: 0;
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: clamp(30px, 6vw, 56px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--white);
  max-width: 16em;
}

.page-faq .faq-hero__lead {
  margin: 18px 0 0;
  max-width: 46ch;
  font-family: var(--font-serif);
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--text-dim);
}

.page-faq .faq-hero__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  padding: 18px 16px;
  border: 1px solid var(--border-dark);
  background: linear-gradient(155deg, rgba(27, 58, 82, 0.9) 0%, rgba(15, 42, 61, 0.6) 100%);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}

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

.page-faq .faq-stat__num {
  display: block;
  font-size: clamp(20px, 4.5vw, 28px);
  line-height: 1;
  color: var(--cyan);
  letter-spacing: -0.02em;
}

.page-faq .faq-stat__label {
  display: block;
  margin-top: 8px;
  font-size: 11.5px;
  line-height: 1.5;
  letter-spacing: 0.05em;
  color: var(--grey);
}

.page-faq .faq-hero__banner {
  position: relative;
  z-index: 1;
  max-width: var(--shell);
  margin: 0 auto;
}

.page-faq .faq-hero__banner img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 1;
  object-fit: cover;
  border-top: 1px solid var(--border-cyan);
}

/* ---------- 主体 ---------- */
.page-faq .faq-body {
  padding: 40px 0 64px;
}

.page-faq .faq-search {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  padding: 16px 18px;
  margin-bottom: 36px;
  border: 1px solid var(--border-dark);
  border-left: 3px solid var(--cyan);
  background: var(--ink-800);
}

.page-faq .faq-search label {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--white);
  flex: 0 0 auto;
}

.page-faq .faq-search input {
  flex: 1 1 200px;
  min-width: 0;
  padding: 8px 2px;
  background: transparent;
  border: 0;
  border-bottom: 1px dashed rgba(199, 210, 220, 0.34);
  color: var(--white);
  font-family: var(--font-mono);
  font-size: 14px;
  outline: none;
  transition: border-color var(--dur) var(--ease);
}

.page-faq .faq-search input::placeholder {
  color: rgba(104, 128, 143, 0.9);
}

.page-faq .faq-search input:focus {
  border-bottom-color: var(--cyan);
}

.page-faq .faq-search__hint {
  flex: 0 0 auto;
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--grey);
}

.page-faq .faq-layout {
  display: grid;
  gap: 32px;
  align-items: start;
}

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

/* ---------- 主题索引 ---------- */
.page-faq .faq-index {
  min-width: 0;
  padding-bottom: 8px;
}

.page-faq .faq-index__title {
  margin: 0 0 12px;
  font-size: 11.5px;
  letter-spacing: 0.18em;
  color: var(--grey);
  text-transform: uppercase;
}

.page-faq .faq-index__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

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

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 10px 12px;
  border: 1px solid var(--border-dark);
  color: var(--text-dim);
  font-family: var(--font-sans);
  font-size: 13.5px;
  line-height: 1.4;
  white-space: nowrap;
  text-decoration: none;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-faq .faq-index__link .mono {
  font-size: 11px;
  color: var(--cyan);
  opacity: 0.8;
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--white);
  border-color: var(--border-cyan);
  background: var(--cyan-soft);
}

.page-faq .faq-index__foot {
  margin: 16px 0 0;
  font-family: var(--font-serif);
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--grey);
}

.page-faq .faq-index__foot a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 255, 0.35);
  transition: border-color var(--dur) var(--ease);
}

.page-faq .faq-index__foot a:hover,
.page-faq .faq-index__foot a:focus-visible {
  border-bottom-color: var(--cyan);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  margin-bottom: 52px;
  scroll-margin-top: var(--faq-sticky-top);
}

.page-faq .faq-group:last-of-type {
  margin-bottom: 40px;
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border-dark);
}

.page-faq .faq-group__num {
  flex: 0 0 auto;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-faq .faq-group h2 {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: clamp(19px, 3.4vw, 26px);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-faq .faq-group__lead {
  margin: 16px 0 6px;
  max-width: 62ch;
  font-family: var(--font-serif);
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--text-dim);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-item {
  border-bottom: 1px solid var(--border-dark);
}

.page-faq .faq-item summary {
  position: relative;
  display: block;
  padding: 17px 36px 17px 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.9);
  transition: color var(--dur) var(--ease);
}

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

.page-faq .faq-item summary::marker {
  content: "";
}

.page-faq .faq-item summary::after {
  content: "+";
  position: absolute;
  right: 2px;
  top: 15px;
  font-family: var(--font-mono);
  font-size: 17px;
  line-height: 1;
  color: var(--cyan);
  transition: transform var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .faq-item[open] summary {
  color: var(--cyan);
}

.page-faq .faq-item[open] summary::after {
  content: "−";
}

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

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

.page-faq .faq-item__body {
  padding: 0 34px 20px 0;
  font-family: var(--font-serif);
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--text-dim);
  animation: faq-reveal 200ms var(--ease);
}

.page-faq .faq-item__body p {
  margin: 0 0 8px;
}

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

.page-faq .faq-item__body a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 255, 0.35);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .faq-item__body a:hover,
.page-faq .faq-item__body a:focus-visible {
  border-bottom-color: var(--cyan);
  color: var(--white);
}

@keyframes faq-reveal {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- 步骤图 ---------- */
.page-faq .faq-figure {
  margin: 22px 0 10px;
  padding: 10px;
  border: 1px solid var(--border-dark);
  background: var(--ink-800);
}

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

.page-faq .faq-figure__cap {
  margin-top: 10px;
  font-size: 11.5px;
  letter-spacing: 0.06em;
  line-height: 1.7;
  color: var(--grey);
}

/* ---------- 底部求助条 ---------- */
.page-faq .faq-help {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 26px 22px;
  border: 1px solid var(--border-cyan);
  background:
    linear-gradient(120deg, rgba(0, 229, 255, 0.08) 0%, rgba(11, 27, 43, 0.4) 55%),
    var(--ink-800);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-faq .faq-help__text {
  flex: 1 1 260px;
  min-width: 0;
}

.page-faq .faq-help h2 {
  margin: 0 0 8px;
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: clamp(18px, 3vw, 22px);
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-faq .faq-help p {
  margin: 0;
  max-width: 56ch;
  font-family: var(--font-serif);
  font-size: 14px;
  line-height: 1.85;
  color: var(--text-dim);
}

.page-faq .faq-help .btn {
  flex: 0 0 auto;
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-hero {
    padding-top: 28px;
  }

  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
    align-items: end;
    gap: 44px;
    padding-bottom: 40px;
  }

  .page-faq .faq-body {
    padding: 56px 0 84px;
  }

  .page-faq .faq-item summary {
    font-size: 15.5px;
    padding-right: 40px;
  }

  .page-faq .faq-item__body {
    font-size: 15px;
    padding-right: 60px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-index-width) minmax(0, 1fr);
    gap: 56px;
  }

  .page-faq .faq-index {
    position: sticky;
    top: var(--faq-sticky-top);
  }

  .page-faq .faq-index__list {
    display: block;
    overflow: visible;
    padding-bottom: 0;
    border-left: 1px solid var(--border-dark);
  }

  .page-faq .faq-index__list li {
    flex: none;
  }

  .page-faq .faq-index__link {
    border: 0;
    border-left: 2px solid transparent;
    padding: 11px 10px 11px 14px;
    margin-left: -1px;
    font-size: 14px;
  }

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    border-left-color: var(--cyan);
  }
}

@media (min-width: 1100px) {
  .page-faq .faq-search {
    padding: 18px 24px;
    margin-bottom: 48px;
  }

  .page-faq .faq-group {
    margin-bottom: 64px;
  }
}
<<<END>>>