.page-faq {
  --faq-rail: 288px;
  --faq-rule: var(--c-grid);
  display: block;
  background: var(--c-ink);
  color: var(--c-mist);
}

/* ---------- 首屏 ---------- */

.page-faq .doc-top {
  position: relative;
  overflow: hidden;
  padding: clamp(64px, 9vw, 128px) 0 clamp(44px, 5vw, 76px);
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .doc-top-inner {
  position: relative;
  z-index: 1;
  min-width: 0;
}

.page-faq .doc-top-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--c-grid) 1px, transparent 1px),
    linear-gradient(to bottom, var(--c-grid) 1px, transparent 1px);
  background-size: 88px 88px;
  opacity: .42;
  -webkit-mask-image: radial-gradient(130% 100% at 76% -12%, #000 0%, transparent 66%);
  mask-image: radial-gradient(130% 100% at 76% -12%, #000 0%, transparent 66%);
  pointer-events: none;
}

.page-faq .doc-top::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: clamp(96px, 14vw, 210px);
  height: clamp(96px, 14vw, 210px);
  background: var(--c-brand);
  transform: translate(32%, -32%);
  pointer-events: none;
}

.page-faq .doc-h1 {
  margin: 16px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(32px, 5.2vw, 66px);
  line-height: 1.06;
  letter-spacing: -0.015em;
  color: var(--c-paper);
  max-width: 18ch;
}

.page-faq .doc-lede {
  margin: 22px 0 0;
  max-width: 62ch;
  font-size: clamp(16px, 1.1vw, 17.5px);
  line-height: 1.85;
  color: var(--c-mist);
}

.page-faq .doc-meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(28px, 4vw, 52px) 0 0;
  padding: 0;
  background: var(--faq-rule);
  border: 1px solid var(--faq-rule);
}

@media (min-width: 720px) {
  .page-faq .doc-meta {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-faq .doc-meta-item {
  background: var(--c-ink);
  padding: 15px 17px;
  min-width: 0;
}

.page-faq .doc-meta-item dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--c-lead);
  text-transform: uppercase;
}

.page-faq .doc-meta-item dd {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.4;
  color: var(--c-paper);
  letter-spacing: 0;
}

/* ---------- 检索外壳 ---------- */

.page-faq .doc-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(32px, 4.5vw, 56px);
  padding-top: clamp(44px, 6vw, 84px);
  padding-bottom: clamp(72px, 8vw, 132px);
}

@media (min-width: 1000px) {
  .page-faq .doc-shell {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: clamp(48px, 5vw, 84px);
    align-items: start;
  }
}

.page-faq .doc-body {
  min-width: 0;
  max-width: 880px;
}

/* ---------- 索引轨道 ---------- */

.page-faq .doc-rail {
  min-width: 0;
  border-top: 2px solid var(--c-brand);
  padding-top: 18px;
}

@media (min-width: 1000px) {
  .page-faq .doc-rail {
    position: sticky;
    top: 112px;
  }
}

.page-faq .rail-title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--c-lead);
  text-transform: uppercase;
}

.page-faq .rail-list {
  list-style: none;
  margin: 0;
  padding: 0 0 4px;
  display: flex;
  gap: 0;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .rail-list > li {
  flex: 0 0 auto;
  min-width: 0;
}

@media (min-width: 1000px) {
  .page-faq .rail-list {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .rail-list > li {
    flex: initial;
  }
}

.page-faq .rail-link {
  display: block;
  min-width: 172px;
  padding: 12px 22px 12px 0;
  border-right: 1px solid var(--faq-rule);
  text-decoration: none;
  color: var(--c-mist);
  transition: color var(--dur-micro) var(--ease);
}

@media (min-width: 1000px) {
  .page-faq .rail-link {
    min-width: 0;
    padding: 13px 0;
    border-right: 0;
    border-bottom: 1px solid var(--faq-rule);
  }
}

.page-faq .rail-link:hover,
.page-faq .rail-link:focus-visible {
  color: var(--c-paper);
}

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

.page-faq .rail-head {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.page-faq .rail-num {
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--c-brand);
}

.page-faq .rail-label {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  color: var(--c-paper);
  transition: color var(--dur-micro) var(--ease);
}

.page-faq .rail-link:hover .rail-label,
.page-faq .rail-link:focus-visible .rail-label {
  color: var(--c-cyan);
}

.page-faq .rail-desc {
  display: block;
  margin-top: 5px;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--c-lead);
}

.page-faq .rail-note {
  margin: 16px 0 0;
  max-width: 30ch;
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--c-lead);
}

/* ---------- 章节骨架 ---------- */

.page-faq .doc-section {
  scroll-margin-top: 112px;
  min-width: 0;
}

.page-faq .doc-section + .doc-section {
  margin-top: clamp(52px, 6vw, 92px);
  padding-top: clamp(34px, 4vw, 56px);
  border-top: 1px solid var(--faq-rule);
}

.page-faq .sec-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 16px;
}

.page-faq .sec-num {
  flex: 0 0 auto;
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--c-brand);
}

.page-faq .sec-head .section-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(21px, 2.3vw, 30px);
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--c-paper);
}

.page-faq .sec-lede {
  margin: 0 0 clamp(20px, 2.6vw, 32px);
  max-width: 64ch;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--c-mist);
}

.page-faq .sub-head {
  margin: clamp(26px, 3vw, 40px) 0 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: .14em;
  color: var(--c-lead);
  text-transform: uppercase;
}

/* ---------- 问答条目 ---------- */

.page-faq .qa {
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .sub-head + .qa {
  border-top: 1px solid var(--faq-rule);
}

.page-faq .qa-q {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  padding: 17px 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(16px, 1.3vw, 18px);
  line-height: 1.5;
  color: var(--c-paper);
  transition: color var(--dur-micro) var(--ease);
}

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

.page-faq .qa-q:hover {
  color: var(--c-cyan);
}

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

.page-faq .qa-q::after {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 19px;
  line-height: 1.2;
  color: var(--c-brand);
  transition: color var(--dur-micro) var(--ease);
}

.page-faq .qa[open] > .qa-q::after {
  content: "−";
  color: var(--c-cyan);
}

.page-faq .qa-a {
  padding: 0 0 clamp(18px, 2.4vw, 28px);
  max-width: 74ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--c-mist);
}

.page-faq .qa-a > p {
  margin: 0 0 14px;
}

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

.page-faq .lnk {
  color: var(--c-brand);
  text-decoration: none;
  border-bottom: 1px solid rgba(30, 94, 255, .45);
  transition: color var(--dur-micro) var(--ease), border-color var(--dur-micro) var(--ease);
}

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

/* ---------- 列表与步骤 ---------- */

.page-faq .doc-list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.page-faq .doc-list > li {
  position: relative;
  padding-left: 18px;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--c-mist);
}

.page-faq .doc-list > li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .82em;
  width: 8px;
  height: 1px;
  background: var(--c-brand);
}

.page-faq .step-list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  border-top: 1px solid var(--faq-rule);
}

.page-faq .step-list > li {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 14px;
  padding: 13px 0;
  border-bottom: 1px solid var(--faq-rule);
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--c-mist);
}

.page-faq .step-num {
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--c-brand);
  padding-top: .45em;
}

/* ---------- 费用表 ---------- */

.page-faq .table-scroller {
  margin: 18px 0 16px;
  overflow-x: auto;
  border: 1px solid var(--faq-rule);
  -webkit-overflow-scrolling: touch;
}

.page-faq .fee-table {
  width: 100%;
  min-width: 470px;
  border-collapse: collapse;
  font-size: 14.5px;
}

.page-faq .fee-table th,
.page-faq .fee-table td {
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid var(--faq-rule);
  vertical-align: top;
}

.page-faq .fee-table thead th {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--c-lead);
  text-transform: uppercase;
  background: var(--c-hull);
}

.page-faq .fee-table tbody td {
  line-height: 1.7;
  color: var(--c-mist);
}

.page-faq .fee-table tbody td.mono {
  font-size: 13px;
  color: var(--c-paper);
}

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

/* ---------- 序号示意 ---------- */

.page-faq .seq-demo {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 12px;
  margin-top: 18px;
  padding: 15px 17px;
  background: var(--c-hull);
  border-left: 2px solid var(--c-amber);
}

.page-faq .seq-chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 5px 10px;
  border: 1px solid var(--faq-rule);
  background: var(--c-ink);
}

.page-faq .seq-num {
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--c-paper);
}

.page-faq .seq-dot {
  display: inline-block;
  flex: 0 0 auto;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--c-amber);
}

.page-faq .seq-note {
  font-size: 12.5px;
  color: var(--c-lead);
}

/* ---------- 图片 ---------- */

.page-faq .figure {
  margin: clamp(26px, 3.4vw, 42px) 0;
}

.page-faq .figure-frame {
  overflow: hidden;
}

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

.page-faq .figure-caption {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 12px;
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--c-lead);
}

.page-faq .figure-caption-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--c-cyan);
  border: 1px solid var(--faq-rule);
  padding: 2px 8px;
}

/* ---------- 端侧对比 ---------- */

.page-faq .split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  border: 1px solid var(--faq-rule);
}

@media (min-width: 760px) {
  .page-faq .split {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-faq .split-col {
  padding: clamp(20px, 2.6vw, 32px);
  min-width: 0;
}

.page-faq .split-col + .split-col {
  border-top: 1px solid var(--faq-rule);
}

@media (min-width: 760px) {
  .page-faq .split-col + .split-col {
    border-top: 0;
    border-left: 1px solid var(--faq-rule);
  }
}

.page-faq .split-tag {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--c-lead);
}

.page-faq .split-lead {
  margin: 8px 0 12px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 21px;
  line-height: 1.2;
  color: var(--c-paper);
}

.page-faq .split .doc-list {
  margin-top: 0;
}

/* ---------- 联络面板 ---------- */

.page-faq .contact-panel {
  border: 1px solid var(--faq-rule);
  border-top: 2px solid var(--c-brand);
  background: var(--c-hull);
  padding: clamp(22px, 3vw, 36px);
}

.page-faq .contact-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  color: var(--c-paper);
}

.page-faq .kv {
  display: grid;
  margin-top: 18px;
}

.page-faq .kv-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 3px;
  padding: 12px 0;
  border-top: 1px solid var(--faq-rule);
}

@media (min-width: 620px) {
  .page-faq .kv-row {
    grid-template-columns: 132px minmax(0, 1fr);
    align-items: baseline;
    gap: 4px 20px;
  }
}

.page-faq .kv-key {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--c-lead);
}

.page-faq .kv-val {
  font-size: 16px;
  line-height: 1.6;
  color: var(--c-paper);
  word-break: break-word;
}

.page-faq .alert-strip {
  margin: 22px 0 0;
  padding: 15px 17px;
  background: rgba(255, 162, 58, .09);
  border-left: 2px solid var(--c-amber);
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--c-mist);
}

/* ---------- 相关页面 ---------- */

.page-faq .doc-links {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  margin-top: clamp(48px, 6vw, 84px);
  padding-top: clamp(26px, 3vw, 40px);
  border-top: 1px solid var(--faq-rule);
}

@media (min-width: 700px) {
  .page-faq .doc-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 40px;
  }
}

.page-faq .doc-link {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid var(--faq-rule);
  text-decoration: none;
  color: var(--c-mist);
  transition: color var(--dur-micro) var(--ease);
}

@media (min-width: 560px) {
  .page-faq .doc-link {
    flex-direction: row;
    align-items: baseline;
    justify-content: space-between;
    gap: 16px;
  }
}

.page-faq .doc-link:hover,
.page-faq .doc-link:focus-visible {
  color: var(--c-cyan);
}

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

.page-faq .doc-link-label {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  color: var(--c-paper);
  transition: color var(--dur-micro) var(--ease);
}

.page-faq .doc-link:hover .doc-link-label,
.page-faq .doc-link:focus-visible .doc-link-label {
  color: var(--c-cyan);
}

.page-faq .doc-link-desc {
  font-size: 13px;
  line-height: 1.6;
  color: var(--c-lead);
}

@media (min-width: 560px) {
  .page-faq .doc-link-desc {
    text-align: right;
  }
}

/* ---------- 窄屏兜底 ---------- */

@media (max-width: 420px) {
  .page-faq .doc-h1 {
    font-size: 30px;
  }

  .page-faq .sec-head {
    gap: 10px;
  }

  .page-faq .qa-q {
    gap: 12px;
  }

  .page-faq .step-list > li {
    grid-template-columns: 26px minmax(0, 1fr);
    gap: 10px;
  }
}
<<<END>>>