.page-faq {
  --faq-card: #FFFFFF;
  --faq-line: rgba(92, 124, 147, 0.24);
  --faq-ink-soft: #33454F;
  --faq-link: #0C6B78;
  background: var(--abyss);
  color: var(--ink);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  background: var(--abyss);
  color: var(--white);
  padding: clamp(20px, 3vw, 34px) 0 clamp(38px, 5.5vw, 70px);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 52%;
  height: 100%;
  background: linear-gradient(155deg, rgba(11, 42, 69, 0.92) 0%, rgba(6, 24, 38, 0) 78%);
  clip-path: polygon(26% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, var(--cyan) 0%, rgba(36, 214, 232, 0) 62%);
  pointer-events: none;
}

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

.page-faq .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0;
  list-style: none;
  margin: 0 0 clamp(20px, 3vw, 34px);
  padding: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.page-faq .breadcrumb li {
  display: flex;
  align-items: center;
  color: var(--steel);
}

.page-faq .breadcrumb li + li::before {
  content: "/";
  margin: 0 9px;
  color: rgba(155, 234, 242, 0.32);
}

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

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

.page-faq .faq-hero__grid {
  display: grid;
  gap: 26px;
}

.page-faq .eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

.page-faq .faq-h1 {
  margin: 0 0 18px;
  max-width: 15ch;
  font-family: var(--font-display);
  font-size: clamp(34px, 5.4vw, 66px);
  line-height: 1.02;
  letter-spacing: 0.01em;
  color: var(--white);
}

.page-faq .faq-lede {
  margin: 0 0 24px;
  max-width: 46ch;
  font-family: var(--font-body);
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.78;
  color: var(--cyan-soft);
}

.page-faq .faq-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 30px;
  list-style: none;
  margin: 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--line);
}

.page-faq .faq-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.page-faq .faq-hero__facts .mono {
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--amber);
}

.page-faq .faq-hero__factlabel {
  font-size: 12px;
  letter-spacing: 0.04em;
  color: rgba(155, 234, 242, 0.66);
}

.page-faq .faq-hero__media {
  margin: 0;
  border: 1px solid var(--line-strong);
  background: var(--navy);
}

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

/* ---------- 阅读区 ---------- */
.page-faq .faq-reading {
  background: var(--mist);
  color: var(--ink);
  padding: clamp(28px, 4vw, 56px) 0 clamp(40px, 6vw, 80px);
}

.page-faq .faq-workspace {
  display: grid;
  gap: 26px;
}

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

.page-faq .faq-rail__sticky {
  background: var(--abyss);
  border: 1px solid var(--line-strong);
  padding: 20px 18px;
}

.page-faq .faq-rail__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-faq .faq-search {
  margin-bottom: 16px;
}

.page-faq .faq-search__label {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: rgba(155, 234, 242, 0.62);
}

.page-faq .faq-search__input {
  width: 100%;
  box-sizing: border-box;
  padding: 9px 11px;
  border: 1px solid var(--line);
  border-radius: 0;
  background: rgba(155, 234, 242, 0.07);
  color: var(--white);
  font-family: var(--font-body);
  font-size: 14px;
}

.page-faq .faq-search__input::placeholder {
  color: rgba(155, 234, 242, 0.42);
}

.page-faq .faq-search__input:focus {
  outline: none;
  border-color: var(--cyan);
  box-shadow: 0 0 0 1px var(--cyan);
}

.page-faq .faq-cats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6px;
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
}

.page-faq .faq-cat {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  gap: 6px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 0;
  background: transparent;
  color: var(--cyan-soft);
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1.3;
  text-align: left;
  cursor: pointer;
  transition: border-color 0.18s var(--ease), background 0.18s var(--ease), color 0.18s var(--ease);
}

.page-faq .faq-cat .mono {
  font-family: var(--font-mono);
  font-size: 11px;
  color: rgba(155, 234, 242, 0.5);
}

.page-faq .faq-cat:hover {
  border-color: var(--line-strong);
  color: var(--white);
}

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

.page-faq .faq-cat.is-active {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--abyss);
  font-weight: 600;
}

.page-faq .faq-cat.is-active .mono {
  color: rgba(6, 24, 38, 0.62);
}

.page-faq .faq-rail__note {
  border-top: 1px solid var(--line);
  padding-top: 14px;
  font-size: 12.5px;
  line-height: 1.7;
  color: rgba(155, 234, 242, 0.72);
}

.page-faq .faq-rail__notetitle {
  margin: 0 0 4px;
  font-family: var(--font-serif);
  font-size: 13px;
  font-weight: 600;
  color: var(--amber);
}

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

/* ---------- 问答 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: clamp(30px, 3.6vw, 52px);
  min-width: 0;
}

.page-faq .faq-block__head {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  margin-bottom: 14px;
  padding-top: 12px;
  border-top: 1px solid rgba(92, 124, 147, 0.45);
}

.page-faq .faq-block__num {
  flex: none;
  padding-top: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--steel);
}

.page-faq .faq-block__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(23px, 3vw, 32px);
  line-height: 1.1;
  letter-spacing: 0.01em;
  color: var(--ink);
}

.page-faq .faq-block__lede {
  margin: 6px 0 0;
  font-family: var(--font-serif);
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--steel);
}

.page-faq .faq-item {
  background: var(--faq-card);
  border: 1px solid var(--faq-line);
  border-left: 3px solid transparent;
  transition: border-left-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.page-faq .faq-item + .faq-item {
  margin-top: 8px;
}

.page-faq .faq-item[open] {
  border-left-color: var(--amber);
  box-shadow: 0 1px 0 rgba(10, 14, 18, 0.06);
}

.page-faq .faq-item summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 15px;
  list-style: none;
  cursor: pointer;
}

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

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

.page-faq .faq-item__no {
  flex: none;
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--steel);
}

.page-faq .faq-item__q {
  flex: 1 1 auto;
  font-family: var(--font-body);
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--ink);
}

.page-faq .faq-item__mark {
  position: relative;
  flex: none;
  width: 14px;
  height: 14px;
  margin-top: 5px;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  background: var(--steel);
  transition: transform 0.2s var(--ease), background 0.2s var(--ease);
}

.page-faq .faq-item__mark::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 1.5px;
}

.page-faq .faq-item__mark::after {
  left: 6px;
  top: 0;
  width: 1.5px;
  height: 14px;
}

.page-faq .faq-item[open] .faq-item__mark::before,
.page-faq .faq-item[open] .faq-item__mark::after {
  background: var(--amber);
}

.page-faq .faq-item[open] .faq-item__mark::after {
  transform: scaleY(0);
}

.page-faq .faq-item__a {
  padding: 0 15px 16px;
}

.page-faq .faq-item__a p {
  margin: 0;
  max-width: 64ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--faq-ink-soft);
}

.page-faq .faq-item__a a {
  color: var(--faq-link);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.page-faq .faq-item__a a:hover {
  color: var(--abyss);
}

.page-faq .faq-hl {
  background: rgba(255, 176, 32, 0.26);
  color: inherit;
  padding: 0 2px;
}

.page-faq .faq-figure {
  margin: 0 0 16px;
  border: 1px solid var(--faq-line);
  background: var(--navy);
}

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

.page-faq .faq-figure figcaption {
  padding: 8px 12px;
  border-top: 1px solid var(--faq-line);
  background: var(--white);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--steel);
}

/* ---------- 联系面板 ---------- */
.page-faq .faq-contact {
  margin-top: 20px;
  padding: clamp(20px, 3vw, 30px);
  border-left: 3px solid var(--cyan);
  background: var(--abyss);
  color: var(--cyan-soft);
}

.page-faq .faq-contact__eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-faq .faq-contact__rows {
  display: grid;
  gap: 10px;
  margin-bottom: 20px;
}

.page-faq .faq-contact__row {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding-top: 8px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-contact__key {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: rgba(155, 234, 242, 0.55);
}

.page-faq .faq-contact__row .contact-value {
  font-size: 14px;
  line-height: 1.6;
  color: var(--white);
  overflow-wrap: anywhere;
}

.page-faq .faq-contact__row .mono {
  font-family: var(--font-mono);
  letter-spacing: 0.01em;
}

.page-faq .faq-contact .btn {
  display: inline-block;
  text-decoration: none;
}

.page-faq .faq-contact__note {
  margin: 14px 0 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: rgba(155, 234, 242, 0.58);
}

.page-faq .faq-contact__note a {
  color: var(--cyan);
}

/* 筛选后无可见条目的章节自动收起 */
.page-faq .faq-block:not(:has(.faq-item:not([hidden]):not(.is-hidden):not([style*="display: none"]))) {
  display: none;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: end;
    gap: 40px;
  }

  .page-faq .faq-item summary {
    padding: 16px 18px;
  }

  .page-faq .faq-item__a {
    padding: 0 18px 18px 42px;
  }

  .page-faq .faq-contact__rows {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px 28px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-workspace {
    grid-template-columns: 292px minmax(0, 1fr);
    gap: 52px;
    align-items: start;
  }

  .page-faq .faq-rail__sticky {
    position: sticky;
    top: 96px;
    padding: 24px 22px;
  }

  .page-faq .faq-cats {
    grid-template-columns: 1fr;
  }

  .page-faq .faq-item__q {
    font-size: 16px;
  }
}

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