.page-faq {
  --faq-line: rgba(199, 211, 222, 0.14);
  --faq-line-soft: rgba(199, 211, 222, 0.08);
  --faq-paper-line: rgba(90, 112, 134, 0.22);
  --faq-answer-text: #16324a;
  background: var(--ink-900);
  color: var(--mist-100);
  padding-bottom: clamp(48px, 7vw, 96px);
  overflow-x: clip;
}

.page-faq .breadcrumb {
  padding-top: clamp(16px, 3vw, 26px);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--mist-300);
}

.page-faq .breadcrumb a {
  color: var(--mist-300);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus-visible {
  color: var(--cyan-400);
  border-bottom-color: var(--cyan-400);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  padding: clamp(28px, 5vw, 56px) 0 clamp(32px, 5vw, 64px);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--faq-line-soft) 1px, transparent 1px),
    linear-gradient(to bottom, var(--faq-line-soft) 1px, transparent 1px);
  background-size: 96px 96px;
  -webkit-mask-image: linear-gradient(to bottom, #000 0%, transparent 88%);
  mask-image: linear-gradient(to bottom, #000 0%, transparent 88%);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  top: -140px;
  right: -100px;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(47, 230, 214, 0.16), transparent 68%);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  display: grid;
  gap: 28px;
}

.page-faq .faq-hero__title {
  margin: 10px 0 0;
  font-size: clamp(2.6rem, 8.5vw, 5.4rem);
  font-weight: 300;
  line-height: 1.02;
  letter-spacing: -0.03em;
  color: var(--paper-050);
}

.page-faq .faq-hero__title::after {
  content: "";
  display: inline-block;
  width: 0.16em;
  height: 0.16em;
  margin-left: 0.14em;
  border-radius: 50%;
  background: var(--cyan-400);
  vertical-align: 0.28em;
  animation: faq-pulse 2.4s ease-in-out infinite;
}

.page-faq .faq-hero__lede {
  margin: 20px 0 0;
  max-width: 54ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--mist-300);
}

.page-faq .faq-hero__aside {
  padding: 20px 22px;
  border: 1px solid var(--faq-line);
  border-radius: 56px 10px 42px 8px;
  background: var(--ink-800);
}

.page-faq .faq-signal {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--cyan-400);
}

.page-faq .faq-hero__note {
  margin: 12px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--mist-300);
}

@keyframes faq-pulse {
  0%, 100% { opacity: 0.4; transform: scale(0.86); }
  50% { opacity: 1; transform: scale(1); }
}

/* ---------- 主体布局 ---------- */

.page-faq .faq-body {
  padding-top: clamp(8px, 2vw, 16px);
}

.page-faq .faq-layout {
  display: grid;
  gap: 26px;
}

.page-faq .faq-toc .index-label {
  margin: 0;
  color: var(--mist-300);
}

.page-faq .faq-toc__list {
  display: flex;
  gap: 8px;
  margin: 12px 0 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-toc__link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  font-size: 13.5px;
  color: var(--mist-300);
  text-decoration: none;
  white-space: nowrap;
  border: 1px solid var(--faq-line);
  border-radius: 20px 6px 20px 6px;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-faq .faq-toc__link:hover,
.page-faq .faq-toc__link:focus-visible {
  color: var(--paper-050);
  border-color: var(--cyan-400);
  background: rgba(47, 230, 214, 0.08);
}

.page-faq .faq-toc__num {
  font-size: 10.5px;
  letter-spacing: 0.06em;
  color: var(--cyan-400);
}

/* ---------- 分组 ---------- */

.page-faq .faq-group + .faq-group {
  margin-top: clamp(44px, 6vw, 76px);
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 6px 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--faq-line);
  margin-bottom: 20px;
  scroll-margin-top: 90px;
}

.page-faq .faq-group__num {
  display: inline-grid;
  place-items: center;
  min-width: 34px;
  height: 26px;
  padding: 0 8px;
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--ink-950);
  background: var(--cyan-400);
  border-radius: 9px 3px 9px 3px;
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(1.4rem, 4vw, 1.9rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--paper-050);
}

.page-faq .faq-group__sub {
  grid-column: 1 / -1;
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist-300);
}

.page-faq .faq-group {
  scroll-margin-top: 88px;
}

/* ---------- 折叠条目 ---------- */

.page-faq .faq-list {
  display: grid;
  gap: 10px;
}

.page-faq .faq-item {
  border: 1px solid var(--faq-line);
  border-radius: 18px 4px 18px 4px;
  background: var(--ink-800);
  overflow: hidden;
  transition: background 0.24s var(--ease), border-color 0.24s var(--ease), border-radius 0.24s var(--ease);
}

.page-faq .faq-item[open] {
  background: var(--paper-050);
  border-color: var(--paper-050);
  border-radius: 26px 6px 26px 6px;
}

.page-faq .faq-q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 16px 16px 14px;
  list-style: none;
  cursor: pointer;
  font-size: 15px;
  line-height: 1.6;
  color: var(--mist-100);
  transition: color 0.2s var(--ease);
}

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

.page-faq .faq-q:hover,
.page-faq .faq-q:focus-visible {
  color: var(--paper-050);
}

.page-faq .faq-q:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: -2px;
}

.page-faq .faq-item[open] .faq-q {
  color: var(--ink-950);
  font-weight: 700;
}

.page-faq .faq-q__num {
  flex: none;
  padding-top: 3px;
  font-size: 10.5px;
  letter-spacing: 0.06em;
  color: var(--cyan-400);
}

.page-faq .faq-item[open] .faq-q__num {
  color: var(--cyan-700);
}

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

.page-faq .faq-q__mark {
  flex: none;
  width: 8px;
  height: 8px;
  margin-top: 7px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(-45deg);
  transition: transform 0.24s var(--ease);
}

.page-faq .faq-item[open] .faq-q__mark {
  transform: rotate(45deg);
}

/* ---------- 答案区 ---------- */

.page-faq .faq-a {
  padding: 0 16px 20px 40px;
  color: var(--faq-answer-text);
  font-size: 14.5px;
  line-height: 1.75;
}

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

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

.page-faq .faq-a a {
  color: var(--cyan-700);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan-700);
}

.page-faq .faq-a a:hover,
.page-faq .faq-a a:focus-visible {
  color: var(--ink-950);
  border-bottom-color: var(--ink-950);
}

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

.page-faq .faq-step {
  display: grid;
  grid-template-columns: 20px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
}

.page-faq .faq-step__num {
  display: inline-grid;
  place-items: center;
  width: 20px;
  height: 20px;
  margin-top: 3px;
  font-size: 10.5px;
  letter-spacing: 0;
  color: var(--ink-950);
  background: var(--cyan-400);
  border-radius: 5px 2px 5px 2px;
}

.page-faq .faq-step p {
  margin: 0;
}

.page-faq .faq-fields {
  display: grid;
  gap: 8px;
  margin: 0 0 12px;
  padding: 0;
  list-style: none;
}

.page-faq .faq-fields li {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2px;
  padding: 8px 0 8px 12px;
  border-left: 2px solid var(--faq-paper-line);
}

.page-faq .faq-fields .mono {
  font-size: 10.5px;
  letter-spacing: 0.06em;
  color: var(--cyan-700);
}

.page-faq .faq-fields--contact {
  margin-bottom: 0;
}

/* ---------- 图片 ---------- */

.page-faq .faq-figure {
  margin: 18px 0 0;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--faq-line);
  border-radius: 26px 6px 26px 6px;
  background: var(--ink-950);
  object-fit: cover;
}

.page-faq .faq-figure figcaption {
  margin-top: 8px;
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--mist-300);
}

/* ---------- 结尾引导 ---------- */

.page-faq .faq-outro {
  margin-top: clamp(48px, 7vw, 88px);
  padding: clamp(26px, 4vw, 40px) 0;
  border-top: 1px solid var(--faq-line);
  background: var(--ink-950);
}

.page-faq .faq-outro__inner {
  display: grid;
  gap: 22px;
}

.page-faq .faq-outro__text .index-label {
  margin: 0;
  color: var(--signal-500);
}

.page-faq .faq-outro__line {
  margin: 10px 0 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist-300);
}

.page-faq .faq-outro__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-faq .faq-outro__actions .btn {
  font-size: 13.5px;
}

/* ---------- 断点 ---------- */

@media (min-width: 720px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1fr) 268px;
    align-items: end;
    gap: 44px;
  }

  .page-faq .faq-a {
    padding: 0 22px 24px 46px;
  }

  .page-faq .faq-q {
    padding: 18px 20px;
    font-size: 15.5px;
  }

  .page-faq .faq-outro__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    gap: 32px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: 216px minmax(0, 1fr);
    gap: clamp(40px, 5vw, 72px);
    align-items: start;
  }

  .page-faq .faq-toc {
    position: sticky;
    top: 96px;
    padding-right: 8px;
  }

  .page-faq .faq-toc__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
    margin-top: 14px;
  }

  .page-faq .faq-toc__link {
    padding: 11px 0 11px 14px;
    border: 0;
    border-left: 1px solid var(--faq-line);
    border-radius: 0;
    background: none;
    white-space: normal;
    font-size: 14px;
    transition: color 0.2s var(--ease), border-color 0.2s var(--ease), padding-left 0.2s var(--ease);
  }

  .page-faq .faq-toc__link:hover,
  .page-faq .faq-toc__link:focus-visible {
    background: none;
    border-left-color: var(--cyan-400);
    border-left-width: 2px;
    padding-left: 17px;
  }

  .page-faq .faq-toc__num {
    font-size: 11px;
  }

  .page-faq .faq-figure {
    margin-left: auto;
    max-width: 78%;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1fr) 310px;
    gap: 64px;
  }

  .page-faq .faq-a {
    padding: 0 26px 26px 52px;
    font-size: 15px;
  }

  .page-faq .faq-q__text {
    font-size: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-hero__title::after {
    animation: none;
  }

  .page-faq .faq-q__mark,
  .page-faq .faq-item,
  .page-faq .faq-q,
  .page-faq .faq-toc__link {
    transition-duration: 0.01ms;
  }
}
<<<END>>>