.page-faq {
  --faq-line: rgba(217, 210, 197, 0.15);
  --faq-line-soft: rgba(217, 210, 197, 0.08);
  --faq-cyan-a: rgba(61, 242, 208, 0.14);
  --faq-orange-a: rgba(255, 106, 43, 0.14);
  background: var(--ink-900);
  color: var(--paper);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 4vw, 46px) var(--gutter) clamp(30px, 4.5vw, 54px);
  background:
    radial-gradient(120% 120% at 92% -20%, var(--faq-cyan-a), rgba(61, 242, 208, 0) 55%),
    radial-gradient(80% 90% at 0% 115%, var(--faq-orange-a), rgba(255, 106, 43, 0) 62%),
    linear-gradient(180deg, var(--ink-950) 0%, var(--ink-900) 68%);
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  top: -16%;
  right: -10%;
  width: 44%;
  height: 132%;
  background: linear-gradient(180deg, rgba(61, 242, 208, 0.1), rgba(61, 242, 208, 0));
  transform: skewX(-8deg);
  pointer-events: none;
}

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

.page-faq .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.05em;
  color: var(--steel);
  text-transform: uppercase;
}

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

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

.page-faq .eyebrow {
  margin: 18px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-hero h1 {
  margin: 10px 0 16px;
  max-width: 18ch;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(32px, 7.4vw, 74px);
  line-height: 1.03;
  letter-spacing: -0.012em;
  color: var(--paper);
}

.page-faq .faq-hero h1 em {
  font-style: normal;
  color: var(--cyan);
}

.page-faq .lede {
  max-width: 64ch;
  margin: 0;
  font-size: clamp(15px, 2.4vw, 17px);
  line-height: 1.8;
  color: rgba(244, 239, 230, 0.82);
}

/* 四组快捷入口 */
.page-faq .faq-quick {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin: 28px 0 0;
  padding: 0;
}

.page-faq .faq-quick__item a {
  display: grid;
  gap: 3px;
  padding: 13px 16px;
  text-decoration: none;
  background: rgba(244, 239, 230, 0.04);
  border-left: 2px solid var(--cyan);
  transition: background 0.22s var(--ease), transform 0.22s var(--ease);
}

.page-faq .faq-quick__item:nth-child(2) a { border-left-color: var(--cyan-soft); }
.page-faq .faq-quick__item:nth-child(3) a { border-left-color: var(--steel); }
.page-faq .faq-quick__item:nth-child(4) a { border-left-color: var(--orange); }

.page-faq .faq-quick__item a:hover,
.page-faq .faq-quick__item a:focus-visible {
  background: rgba(244, 239, 230, 0.08);
  transform: translateX(3px);
  outline: none;
}

.page-faq .faq-quick__no {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--steel);
}

.page-faq .faq-quick__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-faq .faq-quick__desc {
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--steel);
}

/* 指标条 */
.page-faq .faq-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 26px 0 0;
  background: var(--faq-line);
  border: 1px solid var(--faq-line);
}

.page-faq .faq-metrics__item {
  padding: 12px 14px;
  background: var(--ink-950);
}

.page-faq .faq-metrics__item dt {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 600;
  line-height: 1.1;
  color: var(--cyan);
}

.page-faq .faq-metrics__item dd {
  margin: 4px 0 0;
  font-size: 12.5px;
  letter-spacing: 0.02em;
  color: var(--steel);
}

/* ---------- 主体骨架 ---------- */
.page-faq .faq-shell {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: clamp(28px, 5vw, 62px) var(--gutter) clamp(48px, 7vw, 92px);
}

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

/* ---------- 左侧索引（移动端为顶部吸附条） ---------- */
.page-faq .faq-rail {
  position: sticky;
  top: 0;
  z-index: 6;
  margin: 0 calc(var(--gutter) * -1);
  padding: 9px var(--gutter);
  background: rgba(5, 13, 23, 0.94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-rail .rail-title {
  display: none;
}

.page-faq .rail-list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 2px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-faq .rail-link {
  display: block;
  white-space: nowrap;
  padding: 7px 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.03em;
  color: var(--steel);
  text-decoration: none;
  border: 1px solid var(--faq-line);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-faq .rail-link:hover,
.page-faq .rail-link:focus-visible {
  color: var(--ink-950);
  background: var(--cyan);
  border-color: var(--cyan);
  outline: none;
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  padding: clamp(26px, 4vw, 42px) 0;
  border-top: 1px solid var(--faq-line);
  scroll-margin-top: 76px;
}

.page-faq .faq-body > .faq-group:first-child {
  padding-top: 4px;
  border-top: 0;
}

.page-faq .faq-group__head {
  position: relative;
  padding-left: 16px;
  margin-bottom: 18px;
  border-left: 3px solid var(--cyan);
}

.page-faq .faq-group--tag .faq-group__head { border-left-color: var(--cyan-soft); }
.page-faq .faq-group--data .faq-group__head { border-left-color: var(--steel); }
.page-faq .faq-group--contact .faq-group__head { border-left-color: var(--orange); }

.page-faq .faq-group__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--steel);
}

.page-faq .faq-group__head .section-title {
  margin: 6px 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(23px, 4.4vw, 34px);
  line-height: 1.15;
  letter-spacing: -0.005em;
  color: var(--paper);
}

.page-faq .faq-group__lede {
  margin: 0;
  max-width: 60ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(244, 239, 230, 0.74);
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-item {
  border-bottom: 1px solid var(--faq-line-soft);
}

.page-faq .faq-item:first-of-type {
  border-top: 1px solid var(--faq-line-soft);
}

.page-faq .faq-item__q {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr) 16px;
  gap: 10px;
  align-items: start;
  padding: 15px 0;
  cursor: pointer;
  list-style: none;
  transition: color 0.2s var(--ease);
}

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

.page-faq .faq-item__q:hover .faq-item__title,
.page-faq .faq-item__q:focus-visible .faq-item__title {
  color: var(--cyan);
}

.page-faq .faq-item__q:focus-visible {
  outline: 1px solid var(--cyan);
  outline-offset: 3px;
}

.page-faq .faq-item__no {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-faq .faq-item__title {
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--paper);
  transition: color 0.2s var(--ease);
}

.page-faq .faq-item__icon {
  position: relative;
  width: 13px;
  height: 13px;
  margin-top: 5px;
  justify-self: end;
}

.page-faq .faq-item__icon::before,
.page-faq .faq-item__icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 0;
  width: 13px;
  height: 1.5px;
  background: var(--steel);
  transition: transform 0.22s var(--ease), background 0.22s var(--ease);
}

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

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

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

.page-faq .faq-item__a {
  padding: 0 0 18px 56px;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(244, 239, 230, 0.8);
}

.page-faq .faq-item__a p {
  margin: 0 0 10px;
}

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

.page-faq .faq-item__a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(61, 242, 208, 0.4);
}

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

/* ---------- 图 ---------- */
.page-faq .faq-figure {
  margin: 20px 0 6px;
  border: 1px solid var(--faq-line);
  background: var(--ink-800);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  filter: saturate(0.92) contrast(1.06);
}

.page-faq .faq-figure figcaption {
  padding: 10px 14px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--steel);
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-split {
  display: grid;
  gap: 18px;
  margin-top: 6px;
}

.page-faq .faq-split .faq-item:first-of-type {
  border-top: 1px solid var(--faq-line-soft);
}

.page-faq .faq-figure--square {
  margin: 0;
}

/* ---------- 数据表 ---------- */
.page-faq .faq-tablewrap {
  margin: 14px 0 0;
  overflow-x: auto;
  border: 1px solid var(--faq-line);
}

.page-faq .faq-table {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  font-size: 13.5px;
}

.page-faq .faq-table th,
.page-faq .faq-table td {
  padding: 10px 12px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--faq-line-soft);
}

.page-faq .faq-table thead th {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--steel);
  background: var(--ink-800);
  border-bottom: 1px solid var(--faq-line);
  white-space: nowrap;
}

.page-faq .faq-table tbody th {
  font-weight: 600;
  color: var(--cyan);
  white-space: nowrap;
}

.page-faq .faq-table tbody td {
  color: rgba(244, 239, 230, 0.8);
  line-height: 1.7;
}

.page-faq .faq-table tbody tr:last-child th,
.page-faq .faq-table tbody tr:last-child td {
  border-bottom: 0;
}

/* ---------- 面板 ---------- */
.page-faq .panel {
  background: var(--ink-800);
  border: 1px solid var(--faq-line);
}

.page-faq .faq-prep {
  margin: 0 0 10px;
  padding: 16px 18px;
  border-left: 3px solid var(--orange);
}

.page-faq .faq-prep__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--orange);
}

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

.page-faq .faq-prep__list li {
  position: relative;
  padding-left: 18px;
  font-size: 13.5px;
  line-height: 1.75;
  color: rgba(244, 239, 230, 0.78);
}

.page-faq .faq-prep__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 7px;
  height: 1.5px;
  background: var(--orange);
}

.page-faq .faq-prep__list strong {
  color: var(--paper);
  font-weight: 600;
}

/* ---------- 联系信息 ---------- */
.page-faq .faq-contact {
  margin-top: 22px;
  padding: 18px;
  border-top: 2px solid var(--cyan);
}

.page-faq .faq-contact__label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--steel);
}

.page-faq .faq-contact .contact-list {
  display: grid;
  gap: 1px;
  background: var(--faq-line);
  border: 1px solid var(--faq-line);
}

.page-faq .faq-contact .contact-row {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr);
  gap: 10px;
  padding: 10px 12px;
  background: var(--ink-900);
}

.page-faq .faq-contact .contact-row__key {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--steel);
}

.page-faq .faq-contact .contact-row__val {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--paper);
  word-break: break-word;
}

.page-faq .faq-contact__note {
  margin: 12px 0 0;
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--steel);
}

/* ---------- 断点 ---------- */
@media (min-width: 560px) {
  .page-faq .faq-metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (min-width: 760px) {
  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1fr) 300px;
    align-items: start;
  }

  .page-faq .faq-item__a {
    padding-left: 56px;
    max-width: 72ch;
  }
}

@media (min-width: 980px) {
  .page-faq .page-grid {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: clamp(28px, 4vw, 56px);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 24px;
    z-index: 2;
    margin: 0;
    padding: 4px 0 4px 14px;
    background: transparent;
    backdrop-filter: none;
    border-bottom: 0;
    border-left: 1px solid var(--faq-line);
  }

  .page-faq .faq-rail .rail-title {
    display: block;
    margin: 0 0 10px;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--steel);
  }

  .page-faq .rail-list {
    display: grid;
    gap: 2px;
    overflow: visible;
  }

  .page-faq .rail-link {
    padding: 8px 8px 8px 10px;
    font-size: 12.5px;
    border: 0;
    border-left: 2px solid transparent;
    margin-left: -16px;
    padding-left: 16px;
  }

  .page-faq .rail-link:hover,
  .page-faq .rail-link:focus-visible {
    color: var(--cyan);
    background: transparent;
    border-left-color: var(--cyan);
  }

  .page-faq .faq-quick {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-group {
    padding: clamp(30px, 3.4vw, 48px) 0;
    scroll-margin-top: 24px;
  }

  .page-faq .faq-item__title {
    font-size: 16.5px;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1fr) 340px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-quick__item a,
  .page-faq .faq-item__icon::before,
  .page-faq .faq-item__icon::after,
  .page-faq .faq-item__title,
  .page-faq .rail-link {
    transition: none;
  }
}
<<<END>>>