.page-faq {
  --faq-gap: clamp(20px, 3vw, 44px);
  --faq-rule: rgba(38, 52, 77, 0.9);
  position: relative;
  background-color: var(--ink-000);
  background-image:
    linear-gradient(to right, rgba(38, 52, 77, 0.32) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(38, 52, 77, 0.32) 1px, transparent 1px);
  background-size: 72px 72px;
  background-position: -1px -1px;
  color: var(--mist);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.7;
  padding-bottom: clamp(48px, 8vw, 104px);
  overflow-x: clip;
}

.page-faq .breadcrumb {
  padding-top: clamp(16px, 3vw, 28px);
}

.page-faq .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.page-faq .breadcrumb a {
  color: var(--cyan);
  text-decoration: none;
}

.page-faq .breadcrumb a:hover {
  text-decoration: underline;
}

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

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding-block: clamp(28px, 5vw, 60px) clamp(36px, 6vw, 64px);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -18%;
  right: -12%;
  width: min(680px, 82vw);
  aspect-ratio: 1;
  background: linear-gradient(135deg, rgba(45, 226, 230, 0.16), rgba(255, 182, 72, 0.06) 52%, transparent 74%);
  clip-path: polygon(26% 0, 100% 0, 100% 70%, 70% 100%, 0 100%, 0 26%);
  pointer-events: none;
}

.page-faq .faq-hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 56px);
  align-items: start;
}

.page-faq .faq-hero__copy .display {
  font-family: var(--font-head);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.08;
  color: var(--white);
  margin: 0 0 20px;
  font-size: clamp(30px, 6.4vw, 62px);
}

.page-faq .faq-hero__copy .lede {
  margin: 0;
  max-width: 54ch;
  font-size: clamp(15px, 2.4vw, 17px);
  color: var(--mist);
}

.page-faq .faq-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 1px;
  margin-top: clamp(24px, 4vw, 38px);
  border: 1px solid var(--line);
  background: var(--line);
}

.page-faq .faq-stat {
  flex: 1 1 140px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 16px 18px;
  background: var(--ink-100);
}

.page-faq .faq-stat__num {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--amber);
  letter-spacing: -0.01em;
}

.page-faq .faq-stat__label {
  font-size: 12.5px;
  color: var(--mist);
  line-height: 1.5;
}

.page-faq .faq-hero__media {
  position: relative;
  border: 1px solid var(--line);
  background: var(--ink-100);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 34px), calc(100% - 34px) 100%, 0 100%);
}

.page-faq .faq-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(45, 226, 230, 0.08) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(45, 226, 230, 0.08) 1px, transparent 1px);
  background-size: 44px 44px;
  pointer-events: none;
}

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

.page-faq .media__caption {
  margin: 0;
  padding: 10px 16px 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--mist);
  border-top: 1px solid var(--line);
}

/* ---------- 热门速查 ---------- */
.page-faq .faq-hot__intro {
  margin: 10px 0 0;
  font-size: 14px;
  color: var(--mist);
}

.page-faq .faq-hot__list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .faq-hot__link {
  display: flex;
  flex-direction: column;
  gap: 10px;
  height: 100%;
  padding: 18px 16px;
  background: var(--ink-100);
  color: var(--white);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.55;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .faq-hot__link:hover,
.page-faq .faq-hot__link:focus-visible {
  background: var(--ink-200);
  color: var(--cyan);
}

.page-faq .faq-hot__num {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--amber);
}

/* ---------- 分类索引 + 手风琴 ---------- */
.page-faq .faq-layout {
  margin-top: clamp(40px, 6vw, 76px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
  align-items: start;
}

.page-faq .faq-rail {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding-block: 16px;
}

.page-faq .faq-rail .eyebrow {
  margin-bottom: 12px;
}

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

.page-faq .faq-rail__item {
  flex: 0 0 auto;
}

.page-faq .faq-rail__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border: 1px solid var(--line);
  background: var(--ink-100);
  color: var(--mist);
  text-decoration: none;
  font-size: 13.5px;
  white-space: nowrap;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  color: var(--white);
  border-color: var(--cyan);
}

.page-faq .faq-rail__link[aria-current] {
  color: var(--ink-000);
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-faq .faq-rail__link[aria-current] .faq-rail__num {
  color: var(--ink-000);
}

.page-faq .faq-rail__num {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-faq .faq-rail__note {
  margin: 14px 0 0;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--mist);
  max-width: 30ch;
}

.page-faq .faq-cat + .faq-cat {
  margin-top: clamp(40px, 6vw, 64px);
}

.page-faq .faq-cat__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-cat__num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.6vw, 36px);
  font-weight: 700;
  line-height: 1;
  color: var(--amber);
  letter-spacing: -0.02em;
}

.page-faq .faq-cat__title {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(19px, 3.2vw, 26px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--white);
  line-height: 1.25;
}

.page-faq .faq-cat__desc {
  margin: 6px 0 0;
  font-size: 13.5px;
  color: var(--mist);
}

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

.page-faq .faq-item__q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 12px;
  align-items: start;
  padding: 17px 4px 17px 0;
  cursor: pointer;
  list-style: none;
  color: var(--white);
  font-family: var(--font-head);
  font-size: clamp(14.5px, 2.4vw, 16px);
  font-weight: 600;
  line-height: 1.5;
  transition: color var(--dur) var(--ease);
}

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

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

.page-faq .faq-item__idx {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.06em;
  color: var(--cyan);
  padding-top: 3px;
}

.page-faq .faq-item__icon {
  flex: none;
  margin-top: 2px;
  color: var(--mist);
  transition: transform var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .faq-item__q:hover .faq-item__icon {
  color: var(--cyan);
}

.page-faq .faq-item[open] .faq-item__q {
  color: var(--cyan);
}

.page-faq .faq-item[open] .faq-item__icon {
  transform: rotate(45deg);
  color: var(--cyan);
}

.page-faq .faq-item__a {
  padding: 0 4px 20px 40px;
  border-left: 2px solid var(--teal);
  margin-left: 4px;
}

.page-faq .faq-item__a p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--mist);
  max-width: 64ch;
}

/* ---------- 窄屏视图说明 ---------- */
.page-faq .faq-mobile__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
  align-items: center;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding-block: clamp(28px, 5vw, 52px);
}

.page-faq .faq-mobile__media {
  position: relative;
  max-width: 420px;
  border: 1px solid var(--line);
  background: var(--ink-100);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 34px 100%, 0 calc(100% - 34px));
}

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

.page-faq .faq-mobile__copy .headline {
  margin: 0 0 14px;
  font-family: var(--font-head);
  font-size: clamp(22px, 3.6vw, 34px);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--white);
}

.page-faq .faq-mobile__copy > p {
  margin: 0 0 20px;
  max-width: 52ch;
}

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

.page-faq .faq-mobile__list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-mobile__list .mono {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--amber);
  padding-top: 3px;
}

.page-faq .faq-mobile__list p {
  margin: 0;
  font-size: 14.5px;
}

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

/* ---------- 操作步骤 ---------- */
.page-faq .faq-steps .headline {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: clamp(24px, 4vw, 38px);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.18;
  color: var(--white);
}

.page-faq .faq-steps__list {
  list-style: none;
  margin: clamp(24px, 4vw, 40px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .faq-step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  padding: 22px 18px;
  background: var(--ink-100);
  align-items: start;
}

.page-faq .faq-step__num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.4vw, 34px);
  font-weight: 700;
  line-height: 1;
  color: var(--teal);
  -webkit-text-stroke: 1px var(--cyan);
  letter-spacing: -0.03em;
}

.page-faq .faq-step__title {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: 16.5px;
  font-weight: 700;
  color: var(--white);
  line-height: 1.35;
}

.page-faq .faq-step__body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
  max-width: 56ch;
}

/* ---------- 联系 ---------- */
.page-faq .faq-help .headline {
  margin: 0 0 24px;
  font-family: var(--font-head);
  font-size: clamp(22px, 3.8vw, 34px);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--white);
}

.page-faq .faq-help__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.page-faq .faq-help__card {
  position: relative;
  padding: 22px 20px 24px;
  background: var(--ink-200);
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan);
}

.page-faq .faq-help__label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--cyan);
  text-transform: uppercase;
}

.page-faq .faq-help__value {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: clamp(15px, 2.6vw, 21px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--amber);
  word-break: break-all;
}

.page-faq .faq-help__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
  max-width: 46ch;
}

.page-faq .faq-help__note {
  margin: 22px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--amber);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mist);
  max-width: 70ch;
}

/* ---------- 相关入口 ---------- */
.page-faq .faq-next .subhead {
  margin: 0 0 20px;
  font-family: var(--font-head);
  font-size: clamp(18px, 2.8vw, 22px);
  font-weight: 700;
  color: var(--white);
}

.page-faq .faq-next__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .faq-next__link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-areas:
    "num name"
    "num desc";
  gap: 2px 14px;
  padding: 16px 18px;
  background: var(--ink-100);
  color: var(--white);
  text-decoration: none;
  font-family: var(--font-head);
  font-size: 15px;
  font-weight: 600;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .faq-next__link .mono {
  grid-area: num;
  align-self: center;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-faq .faq-next__desc {
  grid-area: desc;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 400;
  color: var(--mist);
}

.page-faq .faq-next__link:hover,
.page-faq .faq-next__link:focus-visible {
  background: var(--ink-200);
  color: var(--cyan);
}

.page-faq .faq-top-link {
  margin: 28px 0 0;
}

.page-faq .faq-top-link a {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--cyan);
  text-decoration: none;
  padding-bottom: 3px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-top-link a:hover {
  border-bottom-color: var(--cyan);
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-hot__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

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

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: center;
  }

  .page-faq .faq-layout {
    grid-template-columns: minmax(200px, 268px) minmax(0, 1fr);
    gap: clamp(32px, 4.5vw, 64px);
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--header-h) + 24px);
    padding-block: 0 4px;
    border-bottom: 0;
  }

  .page-faq .faq-rail__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
    margin-top: 14px;
  }

  .page-faq .faq-rail__item + .faq-rail__item {
    border-top: 1px solid var(--line);
  }

  .page-faq .faq-rail__link {
    display: flex;
    width: 100%;
    padding: 12px 10px 12px 0;
    border: 0;
    background: transparent;
    white-space: normal;
    font-size: 14px;
    border-left: 2px solid transparent;
    padding-left: 12px;
  }

  .page-faq .faq-rail__link:hover,
  .page-faq .faq-rail__link:focus-visible {
    border-left-color: var(--cyan);
    background: rgba(45, 226, 230, 0.06);
  }

  .page-faq .faq-rail__link[aria-current] {
    background: rgba(45, 226, 230, 0.1);
    color: var(--cyan);
    border-left-color: var(--cyan);
  }

  .page-faq .faq-rail__link[aria-current] .faq-rail__num {
    color: var(--amber);
  }

  .page-faq .faq-mobile__grid {
    grid-template-columns: minmax(0, 0.72fr) minmax(0, 1fr);
    gap: clamp(32px, 5vw, 64px);
  }

  .page-faq .faq-mobile__media {
    justify-self: start;
    width: 100%;
  }
}

@media (min-width: 1160px) {
  .page-faq .faq-hot__list {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__icon,
  .page-faq .faq-hot__link,
  .page-faq .faq-next__link,
  .page-faq .faq-rail__link {
    transition: none;
  }
}
<<<END>>>