.page-faq {
  --faq-rail-w: 262px;
  --faq-gap: clamp(28px, 4.5vw, 56px);
  --faq-measure: 68ch;
  overflow-wrap: break-word;
}

/* ============ 首屏 ============ */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(30px, 5vw, 68px) 0 clamp(30px, 5vw, 60px);
  background:
    radial-gradient(122% 96% at 86% 4%, rgba(255, 107, 53, .16), transparent 60%),
    linear-gradient(178deg, var(--night) 0%, var(--ink) 78%);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(to right, rgba(199, 208, 217, .07) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(199, 208, 217, .07) 1px, transparent 1px);
  background-size: 88px 88px;
  -webkit-mask-image: linear-gradient(160deg, #000 10%, transparent 76%);
  mask-image: linear-gradient(160deg, #000 10%, transparent 76%);
  pointer-events: none;
}

.page-faq .faq-hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(26px, 4vw, 46px);
}

@media (min-width: 900px) {
  .page-faq .faq-hero-inner {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
    align-items: center;
  }
}

.page-faq .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-size: .8125rem;
  color: var(--silver);
}

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

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

.page-faq .breadcrumb span[aria-current] {
  color: var(--signal);
}

.page-faq .faq-hero .eyebrow {
  margin: clamp(18px, 3vw, 30px) 0 0;
  color: var(--signal);
  letter-spacing: .16em;
}

.page-faq .faq-hero h1 {
  margin: clamp(10px, 1.6vw, 16px) 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2rem, 7vw, 3.9rem);
  line-height: 1.05;
  letter-spacing: -.005em;
  color: var(--white);
  text-wrap: balance;
}

.page-faq .faq-hero .lede {
  margin: clamp(14px, 2vw, 22px) 0 0;
  max-width: 62ch;
  font-size: clamp(.9375rem, 1.2vw, 1.0625rem);
  line-height: 1.85;
  color: var(--silver);
}

.page-faq .faq-quick {
  display: grid;
  gap: 10px;
  margin-top: clamp(22px, 3.2vw, 34px);
}

@media (min-width: 620px) {
  .page-faq .faq-quick {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-faq .faq-quick a {
  display: block;
  padding: 13px 15px 14px;
  background: var(--glass);
  border: 1px solid var(--line);
  border-left: 3px solid var(--signal);
  color: var(--white);
  font-size: .9375rem;
  font-weight: 600;
  line-height: 1.5;
  text-decoration: none;
  transition: background var(--speed) ease, transform var(--speed) ease;
}

.page-faq .faq-quick a span {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: .625rem;
  font-weight: 400;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--signal);
}

.page-faq .faq-quick a:hover,
.page-faq .faq-quick a:focus-visible {
  background: var(--glass-strong);
  transform: translateY(-2px);
}

.page-faq .faq-hero-figure {
  margin: 0;
  border: 1px solid var(--line-strong);
  background: var(--night);
  overflow: hidden;
}

.page-faq .faq-hero-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

/* ============ 主体分区 ============ */
.page-faq .faq-zone {
  padding: clamp(38px, 6vw, 80px) 0 clamp(56px, 9vw, 118px);
  background: var(--ink);
}

.page-faq .faq-layout {
  display: grid;
  gap: var(--faq-gap);
}

@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    align-items: start;
  }
}

/* 左侧固定索引 */
.page-faq .faq-rail {
  padding: 18px 16px 20px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(19, 42, 71, .92), rgba(11, 27, 51, .72));
}

@media (min-width: 1000px) {
  .page-faq .faq-rail {
    position: sticky;
    top: 96px;
    max-height: calc(100vh - 128px);
    overflow-y: auto;
  }
}

.page-faq .faq-rail .eyebrow {
  margin: 0 0 12px;
  color: var(--signal);
  letter-spacing: .16em;
}

.page-faq .faq-index {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: faq-idx;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-faq .faq-index li {
  counter-increment: faq-idx;
}

.page-faq .faq-index a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 10px;
  border-left: 2px solid transparent;
  color: var(--silver);
  font-size: .875rem;
  line-height: 1.5;
  text-decoration: none;
  transition: color var(--speed) ease, background var(--speed) ease, border-color var(--speed) ease;
}

.page-faq .faq-index a::before {
  content: counter(faq-idx, decimal-leading-zero);
  flex: none;
  font-family: var(--font-mono);
  font-size: .625rem;
  letter-spacing: .08em;
  color: var(--line-strong);
}

.page-faq .faq-index a:hover,
.page-faq .faq-index a:focus-visible {
  color: var(--white);
  background: var(--glass);
}

.page-faq .faq-index a[aria-current="true"] {
  color: var(--white);
  background: var(--glass);
  border-left-color: var(--signal);
}

.page-faq .faq-index a[aria-current="true"]::before {
  color: var(--signal);
}

.page-faq .faq-rail-foot {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-size: .8125rem;
  line-height: 1.7;
  color: var(--silver);
}

.page-faq .faq-rail-foot p {
  margin: 0;
}

.page-faq .faq-rail-foot .mono {
  margin-bottom: 6px;
  font-size: .6875rem;
  letter-spacing: .1em;
  color: var(--teal-soft);
}

/* 右侧内容列 */
.page-faq .faq-column {
  display: flex;
  flex-direction: column;
  gap: clamp(38px, 5.5vw, 74px);
  min-width: 0;
}

.page-faq .faq-block {
  min-width: 0;
  scroll-margin-top: 100px;
}

.page-faq .faq-block-head {
  position: relative;
  padding-bottom: 14px;
  margin-bottom: clamp(18px, 2.4vw, 26px);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-block-head::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 56px;
  height: 2px;
  background: var(--signal);
}

.page-faq .faq-block-head .eyebrow {
  margin: 0 0 8px;
  color: var(--signal);
  letter-spacing: .16em;
}

.page-faq .faq-block-head h2 {
  margin: 0;
  max-width: 34ch;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.35rem, 3vw, 2rem);
  line-height: 1.2;
  color: var(--white);
}

.page-faq .faq-block-sub {
  margin: 12px 0 0;
  max-width: var(--faq-measure);
  font-size: .9375rem;
  line-height: 1.8;
  color: var(--silver);
}

.page-faq .faq-block-tail {
  margin: 18px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--line-strong);
  max-width: var(--faq-measure);
  font-size: .875rem;
  line-height: 1.8;
  color: var(--silver);
}

.page-faq .faq-block-tail a {
  color: var(--signal);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 107, 53, .45);
  transition: color var(--speed) ease, border-color var(--speed) ease;
}

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

/* ============ 分类网格 ============ */
.page-faq .faq-cat-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

@media (min-width: 620px) {
  .page-faq .faq-cat-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1280px) {
  .page-faq .faq-cat-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-faq .faq-cat {
  display: flex;
  flex-direction: column;
  gap: 7px;
  min-width: 0;
  padding: 18px 18px 16px;
  background: var(--night);
  transition: background var(--speed) ease;
}

.page-faq .faq-cat:hover {
  background: #16304e;
}

.page-faq .cat-no {
  font-family: var(--font-mono);
  font-size: .625rem;
  letter-spacing: .16em;
  color: var(--signal);
}

.page-faq .faq-cat h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.0625rem;
  letter-spacing: .02em;
  color: var(--white);
}

.page-faq .faq-cat p {
  margin: 0;
  font-size: .8125rem;
  line-height: 1.7;
  color: var(--silver);
}

.page-faq .cat-meta {
  margin-top: auto;
  padding-top: 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 10px;
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .04em;
  color: var(--teal-soft);
}

/* ============ 折叠问答 ============ */
.page-faq .faq-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-faq .faq-item {
  border: 1px solid var(--line);
  border-left: 3px solid var(--line-strong);
  background: rgba(19, 42, 71, .55);
  transition: border-color var(--speed) ease, background var(--speed) ease;
}

.page-faq .faq-item[open] {
  border-left-color: var(--signal);
  background: rgba(19, 42, 71, .88);
}

.page-faq .faq-item summary {
  position: relative;
  list-style: none;
  cursor: pointer;
  padding: 15px 46px 15px 16px;
  font-size: .9375rem;
  font-weight: 600;
  line-height: 1.6;
  color: var(--white);
  transition: background var(--speed) ease;
}

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

.page-faq .faq-item summary:hover {
  background: var(--glass);
}

.page-faq .faq-item summary::after {
  content: "+";
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 1.0625rem;
  line-height: 1;
  color: var(--signal);
}

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

.page-faq .faq-answer {
  margin: 0 16px 16px;
  padding-top: 14px;
  border-top: 1px dashed var(--line);
  font-size: .9375rem;
  line-height: 1.85;
  color: var(--silver);
}

.page-faq .faq-answer p {
  margin: 0 0 .75em;
}

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

.page-faq .faq-answer strong {
  color: var(--teal-soft);
  font-weight: 600;
}

/* ============ 数据表与结算提示 ============ */
.page-faq .faq-table-wrap {
  margin-top: 4px;
  border: 1px solid var(--line);
}

.page-faq .data-table caption {
  caption-side: top;
  text-align: left;
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .12em;
  color: var(--teal-soft);
}

.page-faq .faq-note {
  margin: 18px 0 0;
  padding: 14px 16px;
  border-left: 3px solid var(--teal);
  background: rgba(95, 168, 159, .1);
  font-size: .875rem;
  line-height: 1.8;
  color: var(--silver);
}

.page-faq .faq-note strong {
  color: var(--teal-soft);
  font-weight: 600;
}

.page-faq .faq-settle-fig {
  margin: clamp(22px, 3vw, 32px) 0 0;
  border: 1px solid var(--line);
  overflow: hidden;
}

.page-faq .faq-settle-fig img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

.page-faq .faq-settle-fig figcaption {
  padding: 11px 14px;
  border-top: 1px solid var(--line);
  background: rgba(10, 14, 20, .5);
  font-size: .75rem;
  line-height: 1.7;
  color: var(--silver);
}

/* ============ 术语条目 ============ */
.page-faq .term-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--line);
}

.page-faq .term-row {
  display: grid;
  gap: 6px;
  padding: 15px 0;
  border-bottom: 1px solid var(--line);
}

@media (min-width: 780px) {
  .page-faq .term-row {
    grid-template-columns: minmax(150px, 205px) minmax(0, 1fr) auto;
    gap: 4px 20px;
    align-items: baseline;
  }
}

.page-faq .term-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px;
  min-width: 0;
}

.page-faq .term-tag {
  flex: none;
  padding: 1px 6px;
  border: 1px solid rgba(255, 107, 53, .38);
  font-family: var(--font-mono);
  font-size: .625rem;
  letter-spacing: .1em;
  line-height: 1.5;
  color: var(--signal);
}

.page-faq .term-name {
  font-family: var(--font-display);
  font-size: 1rem;
  letter-spacing: .02em;
  color: var(--white);
}

.page-faq .term-desc {
  margin: 0;
  font-size: .8438rem;
  line-height: 1.8;
  color: var(--silver);
  overflow-wrap: break-word;
}

.page-faq .term-stamp {
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .04em;
  color: var(--amber);
  white-space: nowrap;
}

/* ============ 版本带 ============ */
.page-faq .version-strip {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 14px;
  margin-top: clamp(24px, 3vw, 34px);
  padding: clamp(18px, 2.5vw, 26px);
  border: 1px solid var(--line);
  background: linear-gradient(120deg, rgba(224, 163, 62, .1), rgba(19, 42, 71, .62) 62%);
}

.page-faq .version-label {
  margin: 0;
  font-size: .6875rem;
  letter-spacing: .16em;
  color: var(--amber);
}

.page-faq .version-track {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .version-track li span {
  display: inline-block;
  padding: 6px 12px;
  border: 1px solid var(--line-strong);
  font-family: var(--font-mono);
  font-size: .75rem;
  white-space: nowrap;
  color: var(--silver);
}

.page-faq .version-track li:first-child span {
  border-color: var(--signal);
  background: rgba(255, 107, 53, .14);
  color: var(--white);
}

.page-faq .version-strip > p:not(.version-label) {
  margin: 0;
  max-width: 62ch;
  font-size: .875rem;
  line-height: 1.8;
  color: var(--silver);
}

/* ============ 联系卡片 ============ */
.page-faq .faq-contact-card {
  display: grid;
  gap: clamp(22px, 3vw, 36px);
  padding: clamp(20px, 3vw, 34px);
  border: 1px solid var(--line-strong);
  background:
    radial-gradient(122% 132% at 100% 0%, rgba(255, 107, 53, .16), transparent 58%),
    linear-gradient(150deg, rgba(19, 42, 71, .95), rgba(11, 27, 51, .9));
}

@media (min-width: 840px) {
  .page-faq .faq-contact-card {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  }
}

.page-faq .faq-contact-lead {
  margin: 0 0 18px;
  max-width: 58ch;
  font-size: .9375rem;
  line-height: 1.85;
  color: var(--silver);
}

.page-faq .faq-contact-card .contact-list {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-faq .faq-contact-card .contact-line {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 12px;
  font-size: .875rem;
}

.page-faq .faq-contact-card .contact-key {
  flex: none;
  min-width: 74px;
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .1em;
  color: var(--signal);
}

.page-faq .faq-contact-card .contact-value {
  color: var(--white);
  overflow-wrap: anywhere;
}

.page-faq .faq-contact-side {
  padding-left: 18px;
  border-left: 2px solid var(--teal);
}

.page-faq .faq-contact-side .eyebrow {
  margin: 0 0 8px;
  color: var(--teal-soft);
  letter-spacing: .16em;
}

.page-faq .faq-contact-side p {
  margin: 0 0 16px;
  font-size: .875rem;
  line-height: 1.8;
  color: var(--silver);
}

.page-faq .faq-contact-side ul {
  margin: 0;
  padding: 0 0 0 16px;
  font-size: .875rem;
  line-height: 1.9;
  color: var(--silver);
}

/* ============ 窄屏与动效收敛 ============ */
@media (max-width: 480px) {
  .page-faq .faq-cat {
    padding: 16px 14px 14px;
  }

  .page-faq .faq-item summary {
    padding: 13px 40px 13px 14px;
    font-size: .9063rem;
  }

  .page-faq .faq-answer {
    margin: 0 14px 14px;
  }

  .page-faq .faq-hero .faq-quick a {
    padding: 12px 13px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-quick a,
  .page-faq .faq-index a,
  .page-faq .faq-item,
  .page-faq .faq-item summary,
  .page-faq .faq-cat,
  .page-faq .breadcrumb a {
    transition: none;
  }

  .page-faq .faq-quick a:hover,
  .page-faq .faq-quick a:focus-visible {
    transform: none;
  }
}
<<<END>>>