.page-faq {
  --faq-rail-w: 248px;
  --faq-gap: 36px;
  --faq-line: rgba(27, 34, 31, 0.14);
  --faq-line-soft: rgba(27, 34, 31, 0.08);
  display: block;
  background: var(--ink-950);
}

/* ---------- 顶部 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: 22px 0 48px;
  color: var(--cyan-200);
  background:
    radial-gradient(120% 90% at 88% -10%, rgba(43, 245, 200, 0.18), transparent 62%),
    linear-gradient(180deg, var(--ink-900) 0%, var(--ink-950) 100%);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0 0 auto auto;
  width: 46%;
  height: 140px;
  background-image: repeating-linear-gradient(
    90deg,
    rgba(43, 245, 200, 0.28) 0 1px,
    transparent 1px 22px
  );
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), transparent);
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), transparent);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(43, 245, 200, 0.55), transparent);
}

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

.page-faq .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: rgba(166, 255, 232, 0.66);
}

.page-faq .breadcrumb__list li + li::before {
  content: "/";
  margin-right: 8px;
  color: rgba(43, 245, 200, 0.5);
}

.page-faq .breadcrumb__list a {
  color: var(--cyan-200);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 245, 200, 0.35);
}

.page-faq .breadcrumb__list a:hover {
  color: var(--cyan-400);
}

.page-faq .breadcrumb__list [aria-current="page"] {
  color: var(--yellow-400);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: 28px;
  align-items: start;
}

.page-faq .faq-hero .eyebrow {
  color: var(--cyan-400);
}

.page-faq .faq-hero h1 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 7vw, 46px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-faq .faq-hero__lead {
  margin: 16px 0 0;
  max-width: 46ch;
  font-size: 16px;
  line-height: 1.75;
  color: rgba(166, 255, 232, 0.86);
}

.page-faq .faq-chips {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 22px 0 0;
  padding: 0;
}

.page-faq .faq-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 13px;
  border: var(--hair-cyan);
  border-radius: var(--r-pill);
  background: rgba(12, 66, 52, 0.55);
  font-size: 13px;
  color: var(--cyan-200);
}

.page-faq .faq-chip__v {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  color: var(--yellow-400);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-faq .faq-hero__media {
  margin: 0;
  border: 1px solid rgba(43, 245, 200, 0.28);
  border-radius: 0 0 var(--r-md) var(--r-md);
  overflow: hidden;
  background: var(--ink-700);
}

.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.page-faq .faq-hero__cap {
  padding: 10px 14px;
  border-top: 1px solid rgba(43, 245, 200, 0.2);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: rgba(166, 255, 232, 0.72);
}

/* ---------- 问题主体 ---------- */
.page-faq .faq-body {
  position: relative;
  padding: 44px 0 56px;
  background: var(--paper);
  color: var(--carbon-900);
}

.page-faq .faq-body .eyebrow {
  color: var(--ink-700);
}

.page-faq .faq-body .section-title {
  margin: 10px 0 0;
  color: var(--carbon-900);
  font-size: clamp(24px, 5vw, 34px);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.page-faq .faq-body .section-lead {
  margin: 12px 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.75;
  color: #39443f;
}

.page-faq .faq-radio {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.page-faq .faq-grid {
  display: grid;
  gap: 22px;
  margin-top: 28px;
}

/* 分类刻度竖列 */
.page-faq .faq-rail {
  border-left: 2px solid var(--faq-line);
  padding-left: 0;
}

.page-faq .faq-rail__head {
  margin: 0 0 10px 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mist-500);
}

.page-faq .faq-rail__item {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 14px;
  border-left: 3px solid transparent;
  margin-left: -2px;
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  cursor: pointer;
  font-size: 15px;
  line-height: 1.4;
  color: var(--carbon-900);
  transition: background-color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-faq .faq-rail__item:hover {
  background: rgba(43, 245, 200, 0.12);
}

.page-faq .faq-rail__count {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  color: var(--mist-500);
}

.page-faq .faq-rail__note {
  margin: 14px 0 0 14px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--mist-500);
}

.page-faq #cat-all:checked ~ .faq-grid .faq-rail__item[for="cat-all"],
.page-faq #cat-login:checked ~ .faq-grid .faq-rail__item[for="cat-login"],
.page-faq #cat-search:checked ~ .faq-grid .faq-rail__item[for="cat-search"],
.page-faq #cat-ios:checked ~ .faq-grid .faq-rail__item[for="cat-ios"],
.page-faq #cat-data:checked ~ .faq-grid .faq-rail__item[for="cat-data"] {
  border-left-color: var(--cyan-400);
  background: rgba(43, 245, 200, 0.2);
  font-weight: 700;
}

.page-faq #cat-all:checked ~ .faq-grid .faq-rail__item[for="cat-all"] .faq-rail__count,
.page-faq #cat-login:checked ~ .faq-grid .faq-rail__item[for="cat-login"] .faq-rail__count,
.page-faq #cat-search:checked ~ .faq-grid .faq-rail__item[for="cat-search"] .faq-rail__count,
.page-faq #cat-ios:checked ~ .faq-grid .faq-rail__item[for="cat-ios"] .faq-rail__count,
.page-faq #cat-data:checked ~ .faq-grid .faq-rail__item[for="cat-data"] .faq-rail__count {
  color: var(--ink-700);
}

.page-faq #cat-all:focus-visible ~ .faq-grid .faq-rail__item[for="cat-all"],
.page-faq #cat-login:focus-visible ~ .faq-grid .faq-rail__item[for="cat-login"],
.page-faq #cat-search:focus-visible ~ .faq-grid .faq-rail__item[for="cat-search"],
.page-faq #cat-ios:focus-visible ~ .faq-grid .faq-rail__item[for="cat-ios"],
.page-faq #cat-data:focus-visible ~ .faq-grid .faq-rail__item[for="cat-data"] {
  outline: 2px solid var(--ink-700);
  outline-offset: 2px;
}

/* 分类过滤 */
.page-faq #cat-login:checked ~ .faq-grid .faq-item:not(.cat-login),
.page-faq #cat-search:checked ~ .faq-grid .faq-item:not(.cat-search),
.page-faq #cat-ios:checked ~ .faq-grid .faq-item:not(.cat-ios),
.page-faq #cat-data:checked ~ .faq-grid .faq-item:not(.cat-data) {
  display: none;
}

.page-faq #cat-login:checked ~ .faq-grid .faq-list--b,
.page-faq #cat-search:checked ~ .faq-grid .faq-list--b,
.page-faq #cat-ios:checked ~ .faq-grid .faq-list--a,
.page-faq #cat-data:checked ~ .faq-grid .faq-list--a {
  display: none;
}

.page-faq .faq-radio:not(#cat-all):checked ~ .faq-grid .faq-banner {
  display: none;
}

/* 问题列表 */
.page-faq .faq-list__title {
  margin: 0 0 16px;
  font-size: clamp(20px, 4.4vw, 26px);
}

.page-faq .faq-list__label {
  margin: 0 0 14px;
  color: var(--ink-700);
}

.page-faq .faq-item {
  margin: 0 0 12px;
  border: 1px solid var(--faq-line);
  border-radius: var(--r-md);
  background: #ffffff;
  overflow: hidden;
  transition: border-color 180ms var(--ease);
}

.page-faq .faq-item:hover {
  border-color: rgba(12, 66, 52, 0.42);
}

.page-faq .faq-item summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--carbon-900);
}

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

.page-faq .faq-item summary:focus-visible {
  outline: 2px solid var(--ink-700);
  outline-offset: -2px;
}

.page-faq .faq-item__no {
  flex: 0 0 auto;
  padding-top: 3px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist-500);
}

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

.page-faq .faq-item summary::after {
  content: "";
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  margin-top: 7px;
  border-right: 2px solid var(--ink-700);
  border-bottom: 2px solid var(--ink-700);
  transform: rotate(45deg);
  transition: transform 220ms var(--ease);
}

.page-faq .faq-item[open] summary::after {
  transform: rotate(225deg);
}

.page-faq .faq-item[open] summary {
  background: rgba(43, 245, 200, 0.1);
}

.page-faq .faq-item__a {
  padding: 14px 16px 18px;
  border-top: 1px solid var(--faq-line-soft);
  font-size: 14.5px;
  line-height: 1.8;
  color: #2f3a35;
}

.page-faq .faq-item__a > * + * {
  margin-top: 10px;
}

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

.page-faq .faq-steps {
  list-style: none;
  counter-reset: faqstep;
  margin: 10px 0 0;
  padding: 0;
}

.page-faq .faq-steps li {
  counter-increment: faqstep;
  position: relative;
  padding-left: 36px;
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.7;
}

.page-faq .faq-steps li::before {
  content: counter(faqstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  width: 26px;
  padding: 1px 0;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--ink-700);
  background: rgba(43, 245, 200, 0.28);
  border-radius: var(--r-sm);
}

/* 跨设备横幅 */
.page-faq .faq-banner {
  display: grid;
  gap: 20px;
  padding: 22px;
  border: 1px solid rgba(43, 245, 200, 0.3);
  border-radius: var(--r-md);
  background:
    linear-gradient(140deg, rgba(43, 245, 200, 0.18) 0%, rgba(12, 66, 52, 0.92) 52%, var(--ink-900) 100%);
  color: var(--cyan-200);
  margin: 4px 0 20px;
}

.page-faq .faq-banner__media {
  margin: 0;
  border: 1px solid rgba(166, 255, 232, 0.24);
  border-radius: 0 0 var(--r-md) var(--r-md);
  overflow: hidden;
}

.page-faq .faq-banner__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 8 / 5;
  object-fit: cover;
}

.page-faq .faq-banner .eyebrow {
  color: var(--cyan-400);
}

.page-faq .faq-banner h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(20px, 4.6vw, 27px);
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-faq .faq-banner__body p {
  margin: 12px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(166, 255, 232, 0.88);
}

.page-faq .faq-banner__steps {
  list-style: none;
  display: grid;
  gap: 8px;
  margin: 16px 0 0;
  padding: 0;
}

.page-faq .faq-banner__steps li {
  display: flex;
  gap: 10px;
  align-items: baseline;
  padding: 9px 12px;
  border: 1px solid rgba(43, 245, 200, 0.22);
  border-radius: var(--r-sm);
  background: rgba(4, 21, 15, 0.42);
  font-size: 13.5px;
  line-height: 1.65;
}

.page-faq .faq-banner__steps .num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  color: var(--yellow-400);
  flex: 0 0 auto;
}

/* ---------- 数据对不上 ---------- */
.page-faq .faq-check {
  padding: 52px 0 56px;
  background:
    radial-gradient(90% 70% at 10% 0%, rgba(12, 66, 52, 0.9), transparent 70%),
    var(--ink-950);
  color: var(--cyan-200);
}

.page-faq .faq-check .eyebrow {
  color: var(--cyan-400);
}

.page-faq .faq-check .section-title {
  margin: 10px 0 0;
  font-size: clamp(23px, 5vw, 32px);
  line-height: 1.18;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-faq .faq-check__lead {
  margin: 12px 0 0;
  max-width: 48ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(166, 255, 232, 0.82);
}

.page-faq .faq-check__intro .btn {
  margin-top: 20px;
}

.page-faq .faq-check__list {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  border-top: var(--hair-cyan-soft);
}

.page-faq .faq-check__list li {
  position: relative;
  padding: 18px 0 18px 0;
  border-bottom: var(--hair-cyan-soft);
}

.page-faq .faq-check__no {
  display: inline-block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--yellow-400);
}

.page-faq .faq-check__list h3 {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--cyan-200);
}

.page-faq .faq-check__list p {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(166, 255, 232, 0.76);
}

/* ---------- 联系 ---------- */
.page-faq .faq-contact {
  padding: 48px 0 60px;
  background: var(--paper);
  color: var(--carbon-900);
}

.page-faq .faq-contact .eyebrow {
  color: var(--ink-700);
}

.page-faq .faq-contact .section-title {
  margin: 10px 0 0;
  font-size: clamp(22px, 4.8vw, 30px);
  line-height: 1.18;
  letter-spacing: -0.02em;
  color: var(--carbon-900);
}

.page-faq .faq-contact__main > p {
  margin: 12px 0 0;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.8;
  color: #39443f;
}

.page-faq .faq-contact__list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-contact__list li {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
  align-items: baseline;
  padding: 12px 0;
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-contact__k {
  flex: 0 0 82px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mist-500);
}

.page-faq .faq-contact__v {
  flex: 1 1 200px;
  min-width: 0;
  font-size: 14.5px;
  line-height: 1.7;
  word-break: break-word;
  color: var(--carbon-900);
}

.page-faq .faq-contact__card {
  margin-top: 26px;
  padding: 22px;
  border: 1px solid var(--faq-line);
  border-left: 3px solid var(--cyan-400);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  background: #ffffff;
}

.page-faq .faq-contact__card h3 {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--carbon-900);
}

.page-faq .faq-contact__hint {
  margin: 14px 0 0;
  padding: 10px 12px;
  border-radius: var(--r-sm);
  background: rgba(255, 210, 74, 0.24);
  font-size: 13.5px;
  line-height: 1.7;
  color: #3a3524;
}

.page-faq .faq-contact__card .btn {
  margin-top: 18px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-hero {
    padding: 30px 0 62px;
  }

  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 40px;
  }

  .page-faq .faq-hero__lead {
    font-size: 17px;
  }

  .page-faq .faq-body {
    padding: 56px 0 72px;
  }

  .page-faq .faq-banner {
    grid-template-columns: minmax(0, 260px) minmax(0, 1fr);
    align-items: center;
    padding: 26px 30px;
    gap: 26px;
  }

  .page-faq .faq-check {
    padding: 64px 0 68px;
  }

  .page-faq .faq-check__grid {
    display: grid;
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 48px;
    align-items: start;
  }

  .page-faq .faq-check__list {
    margin-top: 0;
  }

  .page-faq .faq-contact {
    padding: 60px 0 76px;
  }

  .page-faq .faq-contact__grid {
    display: grid;
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 40px;
    align-items: start;
  }

  .page-faq .faq-contact__card {
    margin-top: 0;
  }
}

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

  .page-faq .faq-rail {
    grid-column: 1;
    grid-row: 1 / span 3;
    position: sticky;
    top: calc(var(--bar-h) + var(--strip-h) + 24px);
    padding-bottom: 12px;
  }

  .page-faq .faq-list--a {
    grid-column: 2;
    grid-row: 1;
  }

  .page-faq .faq-banner {
    grid-column: 1 / -1;
    grid-row: 2;
    margin: 22px 0;
  }

  .page-faq .faq-list--b {
    grid-column: 2;
    grid-row: 3;
  }

  .page-faq .faq-item summary {
    padding: 17px 20px;
    font-size: 16px;
  }

  .page-faq .faq-item__a {
    padding: 16px 20px 20px;
    font-size: 15px;
  }

  .page-faq .faq-banner {
    grid-template-columns: minmax(0, 320px) minmax(0, 1fr);
    padding: 30px 34px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item summary::after,
  .page-faq .faq-rail__item,
  .page-faq .faq-item {
    transition: none;
  }
}
<<<END>>>