.page-faq {
  --faq-card: #ffffff;
  --faq-hair: rgba(46, 86, 117, .16);
  --faq-hair-strong: rgba(46, 86, 117, .3);
  --faq-soft: rgba(199, 220, 235, .24);
  position: relative;
  background: var(--paper);
  color: var(--ink-text);
  font-family: var(--font-sans);
}

.page-faq img {
  max-width: 100%;
  height: auto;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(104px, 13vw, 152px) 0 clamp(44px, 6vw, 76px);
  color: var(--paper);
  background:
    radial-gradient(90% 76% at 86% 6%, rgba(50, 225, 208, .18), transparent 62%),
    radial-gradient(70% 60% at 4% 94%, rgba(106, 111, 143, .3), transparent 66%),
    linear-gradient(158deg, var(--ink-900) 0%, var(--ink-800) 56%, #0d3352 100%);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 76px 76px;
  opacity: .16;
  pointer-events: none;
  -webkit-mask-image: radial-gradient(72% 66% at 74% 24%, #000, transparent 78%);
  mask-image: radial-gradient(72% 66% at 74% 24%, #000, transparent 78%);
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__crumb .breadcrumb__list {
  margin: 0 0 clamp(24px, 4vw, 40px);
}

.page-faq .faq-hero__crumb .breadcrumb__list a {
  color: var(--mist);
  text-decoration: none;
}

.page-faq .faq-hero__crumb .breadcrumb__list a:hover {
  color: var(--cyan);
}

.page-faq .faq-hero .eyebrow {
  color: var(--cyan);
  margin: 0 0 14px;
}

.page-faq h1 {
  margin: 0 0 clamp(16px, 2.4vw, 24px);
  max-width: 18em;
  font-size: clamp(30px, 5.2vw, 58px);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: .015em;
}

.page-faq .faq-hero__lead {
  margin: 0;
  max-width: 60ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: rgba(244, 250, 255, .82);
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(20px, 5vw, 64px);
  margin: clamp(28px, 4.4vw, 46px) 0 0;
  padding-top: 22px;
  border-top: 1px solid rgba(199, 220, 235, .22);
}

.page-faq .faq-hero__meta div {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-faq .faq-hero__meta dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--mist);
  opacity: .8;
}

.page-faq .faq-hero__meta dd {
  margin: 0;
  font-size: clamp(18px, 2.4vw, 24px);
  font-weight: 800;
  color: var(--cyan);
}

/* ---------- 主体栅格 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 56px);
  padding-block: clamp(32px, 5vw, 72px) clamp(48px, 7vw, 96px);
}

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

/* ---------- 粘性索引 ---------- */
.page-faq .faq-rail {
  display: block;
}

.page-faq .faq-rail__title {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--violet);
}

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

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

.page-faq .spy-link {
  display: inline-block;
  white-space: nowrap;
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--faq-hair);
  background: var(--faq-card);
  color: var(--ink-text);
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
  transition: background .25s var(--ease), color .25s var(--ease), border-color .25s var(--ease);
}

.page-faq .spy-link.is-active {
  background: var(--ink-900);
  border-color: var(--ink-900);
  color: var(--cyan);
}

.page-faq .faq-rail__cta {
  display: none;
}

/* ---------- 章节 ---------- */
.page-faq .faq-section {
  padding-block: clamp(30px, 4.4vw, 52px);
  border-top: 1px solid var(--faq-hair);
}

.page-faq .faq-section:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-faq .faq-section__head {
  margin-bottom: clamp(20px, 3vw, 30px);
}

.page-faq .faq-section .eyebrow {
  margin: 0 0 10px;
  color: var(--teal);
  font-size: 11px;
  letter-spacing: .12em;
}

.page-faq .faq-section h2 {
  margin: 0 0 12px;
  font-size: clamp(23px, 3.2vw, 34px);
  font-weight: 800;
  line-height: 1.26;
  letter-spacing: .01em;
  color: var(--ink-900);
}

.page-faq .faq-section__intro {
  margin: 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--line);
}

.page-faq .faq-note {
  margin: 20px 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--mint);
  font-size: 14px;
  line-height: 1.78;
  color: var(--line);
}

.page-faq .faq-note a {
  color: var(--teal);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid rgba(14, 143, 134, .35);
}

.page-faq .faq-note a:hover {
  color: var(--ink-900);
}

/* ---------- 诊断板 ---------- */
.page-faq .diag {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-faq .diag-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 24px 20px 20px;
  border: 1px solid var(--faq-hair);
  border-radius: var(--radius-md);
  background: var(--faq-card);
  box-shadow: 0 16px 34px -30px rgba(6, 26, 46, .55);
  overflow: hidden;
}

.page-faq .diag-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 4px;
  background: var(--tone, var(--cyan));
}

.page-faq .diag-card--route { --tone: var(--orange); }
.page-faq .diag-card--compat { --tone: var(--cyan); }
.page-faq .diag-card--register { --tone: var(--violet); }

.page-faq .diag-card__no {
  margin: 0;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--tone, var(--teal));
}

.page-faq .diag-card .pill {
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--ink-900);
  background: var(--faq-soft);
}

.page-faq .diag-card h3 {
  margin: 0;
  font-size: 17px;
  font-weight: 800;
  line-height: 1.42;
  color: var(--ink-900);
}

.page-faq .diag-card__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--line);
}

.page-faq .diag-card__rows {
  display: grid;
  gap: 8px;
  margin: 4px 0 0;
}

.page-faq .diag-card__rows div {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
}

.page-faq .diag-card__rows dt {
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--teal);
}

.page-faq .diag-card__rows dd {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.66;
  color: var(--ink-text);
}

.page-faq .diag-card__link {
  margin-top: auto;
  padding-top: 8px;
  align-self: flex-start;
  font-size: 13.5px;
  font-weight: 700;
  color: var(--teal);
  text-decoration: none;
  border-bottom: 1px solid rgba(14, 143, 134, .4);
}

.page-faq .diag-card__link:hover {
  color: var(--ink-900);
  border-bottom-color: var(--ink-900);
}

/* ---------- 兼容对照表 ---------- */
.page-faq .compat {
  overflow-x: auto;
  border: 1px solid var(--faq-hair);
  border-radius: var(--radius-md);
  background: var(--faq-card);
}

.page-faq .compat table {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
  font-size: 14px;
}

.page-faq .compat__caption {
  caption-side: top;
  padding: 14px 16px 4px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--violet);
}

.page-faq .compat th,
.page-faq .compat td {
  padding: 13px 16px;
  text-align: left;
  vertical-align: top;
}

.page-faq .compat thead th {
  background: var(--ink-800);
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .08em;
  white-space: nowrap;
}

.page-faq .compat tbody th {
  font-weight: 800;
  color: var(--ink-900);
  white-space: nowrap;
}

.page-faq .compat tbody td {
  color: var(--line);
  line-height: 1.66;
}

.page-faq .compat tbody tr + tr th,
.page-faq .compat tbody tr + tr td {
  border-top: 1px solid var(--faq-hair);
}

.page-faq .compat tbody tr:nth-child(even) {
  background: rgba(199, 220, 235, .2);
}

.page-faq .state {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
}

.page-faq .state::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

.page-faq .state--ok {
  color: #0b5c50;
  background: rgba(143, 227, 193, .38);
}

.page-faq .state--mid {
  color: #7a3d10;
  background: rgba(255, 199, 168, .46);
}

/* ---------- 绕行路径 ---------- */
.page-faq .route-figure {
  margin: 0 0 20px;
  padding: clamp(16px, 3vw, 26px);
  border-radius: var(--radius-md);
  background: var(--faq-card);
  border: 1px solid var(--faq-hair);
}

.page-faq .route-svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-faq .route-figure figcaption {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--violet);
}

.page-faq .route-notes {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin-bottom: 20px;
}

.page-faq .route-notes__item {
  padding: 16px 18px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--faq-hair);
  background: var(--faq-card);
}

.page-faq .route-notes__item--new {
  border-color: rgba(14, 143, 134, .4);
  background: rgba(143, 227, 193, .16);
}

.page-faq .route-notes__label {
  margin: 0 0 8px;
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--violet);
}

.page-faq .route-notes__item--new .route-notes__label {
  color: var(--teal);
}

.page-faq .route-notes__item p:last-child {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-text);
}

/* ---------- 注册步骤 ---------- */
.page-faq .steps {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: faq-step;
}

.page-faq .steps li {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 16px 18px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--faq-hair);
  background: var(--faq-card);
}

.page-faq .steps__no {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: var(--radius-pill);
  background: var(--ink-900);
  color: var(--cyan);
  font-size: 12px;
  letter-spacing: .04em;
}

.page-faq .steps h3 {
  margin: 0 0 6px;
  font-size: 15.5px;
  font-weight: 800;
  color: var(--ink-900);
}

.page-faq .steps p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--line);
}

/* ---------- 自查清单 ---------- */
.page-faq .checklist {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .checklist__label {
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 15px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--faq-hair);
  background: var(--faq-card);
  cursor: pointer;
  transition: border-color .25s var(--ease), background .25s var(--ease);
}

.page-faq .checklist__label:hover {
  border-color: rgba(14, 143, 134, .42);
}

.page-faq .checklist__box {
  appearance: none;
  -webkit-appearance: none;
  position: relative;
  width: 22px;
  height: 22px;
  margin: 1px 0 0;
  border: 2px solid var(--line);
  border-radius: 7px;
  background: var(--paper);
  cursor: pointer;
  transition: background .2s var(--ease), border-color .2s var(--ease);
}

.page-faq .checklist__box:checked {
  background: var(--teal);
  border-color: var(--teal);
}

.page-faq .checklist__box:checked::after {
  content: "";
  position: absolute;
  left: 6px;
  top: 2px;
  width: 6px;
  height: 11px;
  border: solid #fff;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.page-faq .checklist__box:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 2px;
}

.page-faq .checklist__text {
  font-size: 14px;
  line-height: 1.75;
  color: var(--line);
}

.page-faq .checklist__text strong {
  display: block;
  margin-bottom: 2px;
  font-weight: 800;
  color: var(--ink-900);
}

/* ---------- 常见问答 ---------- */
.page-faq .qa {
  border-top: 1px solid var(--faq-hair-strong);
}

.page-faq .qa__item {
  border-bottom: 1px solid var(--faq-hair-strong);
}

.page-faq .qa__item summary {
  position: relative;
  padding: 16px 34px 16px 0;
  font-size: 15.5px;
  font-weight: 700;
  color: var(--ink-900);
  cursor: pointer;
  list-style: none;
}

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

.page-faq .qa__item summary::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: 13px;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--teal);
}

.page-faq .qa__item[open] summary::after {
  content: "–";
}

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

.page-faq .qa__item p {
  margin: 0 0 20px;
  max-width: 68ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--line);
}

.page-faq .qa__item p a {
  color: var(--teal);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid rgba(14, 143, 134, .4);
}

/* ---------- 联系支持 ---------- */
.page-faq .support {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-faq .support__card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px;
  border-radius: var(--radius-md);
  background: var(--ink-900);
  color: var(--paper);
}

.page-faq .support__card--mail {
  background: linear-gradient(150deg, var(--ink-800), var(--ink-900));
  border: 1px solid rgba(50, 225, 208, .3);
}

.page-faq .support__label {
  margin: 0;
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--mist);
  opacity: .85;
}

.page-faq .support__value {
  margin: 0;
  font-size: clamp(19px, 2.4vw, 23px);
  font-weight: 800;
  color: var(--cyan);
  letter-spacing: .02em;
}

.page-faq .support__hint {
  margin: 0;
  font-size: 13px;
  line-height: 1.66;
  color: rgba(244, 250, 255, .68);
}

.page-faq .copy-email {
  align-self: flex-start;
  padding: 0 0 3px;
  border: 0;
  border-bottom: 1px dashed rgba(199, 220, 235, .55);
  background: transparent;
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: clamp(13px, 1.6vw, 15px);
  letter-spacing: .01em;
  text-align: left;
  cursor: pointer;
  word-break: break-all;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-faq .copy-email:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-faq .copy-email:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 3px;
}

.page-faq .copy-email__status {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--mint);
}

.page-faq .copy-email__status:empty {
  display: none;
}

/* ---------- 渐进显现 ---------- */
.page-faq [data-reveal] {
  opacity: 1;
}

.page-faq .has-js [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .45s var(--ease), transform .45s var(--ease);
}

.page-faq .has-js [data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

/* ---------- 断点 ---------- */
@media (min-width: 700px) {
  .page-faq .diag,
  .page-faq .support {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 980px) {
  .page-faq .faq-body {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: clamp(40px, 5vw, 72px);
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 96px;
    align-self: start;
  }

  .page-faq .faq-rail__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .spy-link {
    display: block;
    padding: 9px 12px;
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    background: transparent;
    font-size: 14px;
    white-space: normal;
  }

  .page-faq .spy-link:hover {
    background: rgba(199, 220, 235, .35);
  }

  .page-faq .spy-link.is-active {
    background: rgba(50, 225, 208, .18);
    border-left-color: var(--teal);
    color: var(--ink-900);
    font-weight: 800;
  }

  .page-faq .faq-rail__cta {
    display: inline-flex;
    margin-top: 20px;
    width: 100%;
    justify-content: center;
    font-size: 14px;
  }

  .page-faq .diag {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .support {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .has-js [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .page-faq .spy-link,
  .page-faq .checklist__label,
  .page-faq .copy-email {
    transition: none;
  }
}
<<<END>>>