.page-faq {
  --faq-gap: clamp(20px, 3vw, 36px);
  --faq-spine-install: var(--teal-jewel);
  --faq-spine-account: var(--indigo-jewel);
  --faq-spine-sync: var(--wine-jewel);
  --faq-spine-fix: linear-gradient(180deg, var(--mist-a), var(--mist-b));
  background: var(--ink-900);
  color: var(--paper);
  font-family: var(--font-sans);
  overflow-x: hidden;
}

/* ---------- 面包屑 ---------- */
.page-faq .faq-crumb {
  background: var(--indigo-jewel);
  border-bottom: 1px solid var(--line);
  padding: 12px 0;
}
.page-faq .faq-crumb .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.page-faq .faq-crumb .breadcrumb-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.page-faq .faq-crumb .breadcrumb-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.18s var(--ease);
}
.page-faq .faq-crumb .breadcrumb-link:hover,
.page-faq .faq-crumb .breadcrumb-link:focus-visible {
  border-bottom-color: var(--cyan);
}
.page-faq .faq-crumb .breadcrumb-link[aria-current="page"] {
  color: var(--mist-b);
  border-bottom-color: transparent;
}
.page-faq .faq-crumb .breadcrumb-sep {
  color: var(--slate);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(40px, 7vw, 84px) 0 clamp(44px, 8vw, 92px);
  background: linear-gradient(155deg, var(--ink-900) 0%, var(--navy-800) 58%, var(--ink-900) 100%);
}
.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -22%;
  right: -14%;
  width: 72%;
  height: 82%;
  background: linear-gradient(135deg, rgba(15, 59, 58, 0.95), rgba(36, 30, 69, 0.92));
  clip-path: polygon(26% 0, 100% 0, 100% 100%, 0 68%);
  pointer-events: none;
}
.page-faq .faq-hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 5vw, 48px);
  align-items: start;
}
.page-faq .eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--slate);
}
.page-faq .faq-hero h1 {
  margin: 0 0 20px;
  font-size: clamp(32px, 6.4vw, 60px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  font-weight: 800;
  max-width: 20ch;
  color: var(--paper);
}
.page-faq .faq-hero h1 span {
  display: block;
  margin-top: 10px;
  font-size: clamp(19px, 2.6vw, 28px);
  line-height: 1.35;
  font-weight: 400;
  letter-spacing: 0;
  color: var(--cyan);
}
.page-faq .lead {
  margin: 0 0 24px;
  max-width: 54ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--mist-b);
}
.page-faq .faq-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.page-faq .faq-chip {
  display: inline-block;
  padding: 6px 12px;
  border: 1px solid var(--line-strong);
  background: rgba(8, 19, 31, 0.6);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--mist-b);
}

/* ---------- 检索示例面板 ---------- */
.page-faq .faq-search {
  background: var(--navy-800);
  border: 2px solid var(--line-strong);
  box-shadow: var(--shadow);
  padding: 20px;
  position: relative;
}
.page-faq .faq-search::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 18px;
  height: 18px;
  background: var(--ink-900);
  clip-path: polygon(100% 0, 100% 100%, 0 100%);
}
.page-faq .faq-search-label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--amber);
}
.page-faq .faq-search-field {
  display: flex;
  align-items: stretch;
  border: 2px solid var(--cyan-line);
  background: var(--ink-900);
  margin-bottom: 12px;
}
.page-faq .faq-search-query {
  flex: 1 1 auto;
  min-width: 0;
  padding: 11px 12px;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--cyan);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.page-faq .faq-search-query::after {
  content: "";
  display: inline-block;
  width: 2px;
  height: 14px;
  margin-left: 4px;
  vertical-align: -2px;
  background: var(--amber);
}
.page-faq .faq-search-btn {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  padding: 0 14px;
  border-left: 2px solid var(--cyan-line);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--paper);
  background: var(--teal-jewel);
}
.page-faq .faq-search-hint {
  margin: 0 0 14px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate);
}
.page-faq .faq-search-results {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}
.page-faq .faq-search-results li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px 10px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line);
}
.page-faq .faq-search-num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--slate);
  padding-top: 2px;
}
.page-faq .faq-search-title {
  font-size: 14px;
  line-height: 1.5;
  color: var(--paper);
}
.page-faq .faq-search-cat {
  grid-column: 2;
  justify-self: start;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  padding: 2px 7px;
  border: 1px solid var(--cyan-line);
  color: var(--cyan);
}

/* ---------- 通用章节 ---------- */
.page-faq .faq-section {
  padding: clamp(44px, 7vw, 88px) 0;
  scroll-margin-top: 96px;
}
.page-faq h2 {
  margin: 0 0 16px;
  font-size: clamp(25px, 3.6vw, 38px);
  line-height: 1.15;
  letter-spacing: -0.01em;
  font-weight: 700;
}
.page-faq h3 {
  margin: 0 0 10px;
  font-size: 18px;
  line-height: 1.4;
  font-weight: 700;
}
.page-faq p {
  margin: 0 0 14px;
  font-size: 15.5px;
  line-height: 1.8;
}

/* ---------- 入口与检索 ---------- */
.page-faq .faq-entry {
  background: var(--ink-900);
  border-top: 2px solid var(--line);
}
.page-faq .faq-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 44px);
  align-items: start;
}
.page-faq .faq-split-main h2 {
  color: var(--paper);
}
.page-faq .faq-split-main p {
  color: var(--mist-b);
  max-width: 56ch;
}
.page-faq .faq-steps {
  list-style: none;
  counter-reset: step;
  margin: 22px 0 18px;
  padding: 0;
}
.page-faq .faq-steps li {
  counter-increment: step;
  position: relative;
  padding-left: 44px;
  margin: 0 0 14px;
  font-size: 15.5px;
  line-height: 1.7;
  color: var(--mist-b);
}
.page-faq .faq-steps li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.2;
  letter-spacing: 0.04em;
  color: var(--cyan);
  border: 1px solid var(--cyan-line);
  padding: 3px 5px;
}
.page-faq .faq-inline-link {
  font-size: 14px;
  color: var(--slate);
  border-left: 3px solid var(--amber);
  padding-left: 12px;
}
.page-faq .faq-inline-link a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 2px solid var(--cyan-line);
  transition: border-color 0.18s var(--ease);
}
.page-faq .faq-inline-link a:hover,
.page-faq .faq-inline-link a:focus-visible {
  border-bottom-color: var(--cyan);
}

/* ---------- 图片 ---------- */
.page-faq .faq-figure {
  margin: 0;
}
.page-faq .faq-frame {
  border: 2px solid var(--line-strong);
  box-shadow: var(--shadow);
  overflow: hidden;
  background: var(--navy-800);
  line-height: 0;
}
.page-faq .faq-frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
.page-faq .faq-figure figcaption {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--slate);
  border-top: 1px solid var(--line);
  padding-top: 8px;
}
.page-faq .faq-figure--wide {
  margin-top: clamp(26px, 4vw, 44px);
}

/* ---------- 四类归档 ---------- */
.page-faq .faq-archive {
  position: relative;
  background: var(--ink-900);
  border-top: 2px solid var(--line);
  border-bottom: 2px solid var(--line);
}
.page-faq .faq-archive::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 180px;
  background: linear-gradient(100deg, rgba(15, 59, 58, 0.95), rgba(15, 59, 58, 0) 78%);
  pointer-events: none;
}
.page-faq .faq-archive .container {
  position: relative;
  z-index: 1;
}
.page-faq .faq-archive-head {
  max-width: 62ch;
  margin-bottom: clamp(24px, 4vw, 38px);
}
.page-faq .faq-archive-head h2 {
  color: var(--paper);
}
.page-faq .faq-archive-head p {
  color: var(--mist-b);
}
.page-faq .faq-cats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
.page-faq .faq-cat {
  position: relative;
  padding: 22px 18px 20px 26px;
  background: rgba(14, 34, 51, 0.86);
  border: 2px solid var(--line);
  box-shadow: var(--shadow-sm);
  transition: border-color 0.2s var(--ease), transform 0.2s var(--ease);
}
.page-faq .faq-cat:hover,
.page-faq .faq-cat:focus-within {
  border-color: var(--cyan);
  transform: translateY(-2px);
}
.page-faq .faq-cat-spine {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 6px;
  background: var(--mist-b);
}
.page-faq .faq-cat--install .faq-cat-spine { background: var(--faq-spine-install); }
.page-faq .faq-cat--account .faq-cat-spine { background: var(--faq-spine-account); }
.page-faq .faq-cat--sync .faq-cat-spine { background: var(--faq-spine-sync); }
.page-faq .faq-cat--fix .faq-cat-spine { background: var(--faq-spine-fix); }
.page-faq .faq-cat-index {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--slate);
}
.page-faq .faq-cat h3 {
  color: var(--paper);
}
.page-faq .faq-cat p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist-b);
  margin-bottom: 12px;
}
.page-faq .faq-cat-list {
  margin: 0 0 14px;
  padding: 0;
  list-style: none;
}
.page-faq .faq-cat-list li {
  position: relative;
  padding-left: 16px;
  margin-bottom: 7px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mist-b);
}
.page-faq .faq-cat-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  background: var(--cyan);
  opacity: 0.75;
}
.page-faq .faq-cat-link {
  margin: 0;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-size: 13px;
}
.page-faq .faq-cat-link a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 2px solid var(--cyan-line);
  padding-bottom: 1px;
}
.page-faq .faq-cat-link a:hover,
.page-faq .faq-cat-link a:focus-visible {
  border-bottom-color: var(--cyan);
}

/* ---------- 高频问题速查（纸白说明板） ---------- */
.page-faq .faq-quick {
  background: var(--paper);
  color: var(--graphite);
}
.page-faq .faq-quick .eyebrow {
  color: var(--wine-jewel);
}
.page-faq .faq-quick-head {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-bottom: 22px;
}
.page-faq .faq-quick-head h2 {
  color: var(--graphite);
  margin-bottom: 0;
}
.page-faq .faq-quick-note {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: #4a545c;
  border-left: 3px solid var(--amber);
  padding-left: 12px;
  max-width: 42ch;
}

.page-faq .faq-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 24px;
}
.page-faq .faq-filter .filter-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 13px;
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--graphite);
  background: transparent;
  border: 2px solid rgba(16, 20, 24, 0.45);
  cursor: pointer;
  transition: background 0.16s var(--ease), color 0.16s var(--ease),
    border-color 0.16s var(--ease), box-shadow 0.16s var(--ease);
}
.page-faq .faq-filter .filter-btn:hover,
.page-faq .faq-filter .filter-btn:focus-visible {
  border-color: var(--teal-jewel);
}
.page-faq .faq-filter .filter-btn[aria-pressed="true"] {
  background: var(--ink-900);
  color: var(--paper);
  border-color: var(--ink-900);
  box-shadow: var(--shadow-sm);
}
.page-faq .faq-filter .filter-count {
  font-family: var(--font-mono);
  font-size: 11px;
  color: #6b757c;
}
.page-faq .faq-filter .filter-btn[aria-pressed="true"] .filter-count {
  color: var(--cyan);
}

.page-faq .faq-item {
  border: 2px solid rgba(16, 20, 24, 0.32);
  background: rgba(255, 255, 255, 0.62);
  box-shadow: var(--shadow-sm);
  margin-bottom: 12px;
  transition: border-color 0.18s var(--ease), box-shadow 0.18s var(--ease);
}
.page-faq .faq-item:hover {
  border-color: rgba(16, 20, 24, 0.6);
}
.page-faq .faq-item[open] {
  border-color: var(--cyan);
  box-shadow: 6px 6px 0 rgba(63, 214, 196, 0.42);
}
.page-faq .faq-item summary {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  color: var(--graphite);
}
.page-faq .faq-item summary::-webkit-details-marker {
  display: none;
}
.page-faq .faq-item-num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--wine-jewel);
  border-bottom: 2px solid rgba(110, 31, 51, 0.35);
  padding-bottom: 1px;
}
.page-faq .faq-item-title {
  flex: 1 1 auto;
  min-width: 0;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.55;
}
.page-faq .faq-item-cat {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: #5d6a73;
  border: 1px solid rgba(16, 20, 24, 0.25);
  padding: 2px 6px;
}
.page-faq .faq-item summary::after {
  flex: 0 0 auto;
  content: "+";
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1;
  color: var(--teal-jewel);
}
.page-faq .faq-item[open] summary::after {
  content: "\2212";
  color: var(--cyan);
}
.page-faq .faq-item .faq-steps {
  margin: 0;
  padding: 2px 16px 16px;
  border-top: 1px dashed rgba(16, 20, 24, 0.2);
  padding-top: 14px;
}
.page-faq .faq-item .faq-steps li {
  font-size: 14.5px;
  color: #2c3339;
  margin-bottom: 10px;
}
.page-faq .faq-item .faq-steps li::before {
  color: var(--teal-jewel);
  border-color: rgba(15, 59, 58, 0.4);
}
.page-faq .is-filtered-out {
  display: none;
}
.page-faq .is-flash {
  animation: faq-fade 0.12s var(--ease) both;
}
@keyframes faq-fade {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ---------- 人工支持（路径板） ---------- */
.page-faq .faq-support {
  background: var(--indigo-jewel);
  border-top: 2px solid var(--line);
}
.page-faq .faq-support-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 44px);
  align-items: start;
}
.page-faq .faq-support-copy h2 {
  color: var(--paper);
}
.page-faq .faq-support-copy p {
  color: var(--mist-b);
  max-width: 56ch;
}
.page-faq .faq-support-copy h3 {
  color: var(--cyan);
  margin-top: 24px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
.page-faq .faq-prepare {
  margin: 0 0 18px;
  padding: 0;
  list-style: none;
}
.page-faq .faq-prepare li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 9px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--mist-b);
}
.page-faq .faq-prepare li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  border: 2px solid var(--cyan);
}
.page-faq .faq-support-note {
  border-left: 3px solid var(--amber);
  padding-left: 12px;
  font-size: 14px;
  color: var(--slate);
}
.page-faq .faq-support-note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 2px solid var(--cyan-line);
}
.page-faq .faq-support-note a:hover,
.page-faq .faq-support-note a:focus-visible {
  border-bottom-color: var(--cyan);
}

.page-faq .faq-contact {
  background: var(--ink-900);
  border: 2px solid var(--cyan-line);
  box-shadow: var(--shadow-cyan);
  padding: 22px 20px;
}
.page-faq .faq-contact-label {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--amber);
}
.page-faq .faq-contact-list {
  margin: 0 0 16px;
  padding: 0;
  list-style: none;
}
.page-faq .faq-contact-list li {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.6;
}
.page-faq .faq-contact-key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--slate);
  padding-top: 3px;
}
.page-faq .faq-contact-val {
  color: var(--paper);
  word-break: break-word;
}
.page-faq .faq-mono {
  font-family: var(--font-mono);
  font-size: 13.5px;
  color: var(--cyan);
  border-bottom: 2px solid var(--cyan-line);
  padding-bottom: 1px;
  justify-self: start;
}
.page-faq .faq-contact-note {
  margin: 0 0 18px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--slate);
}
.page-faq .faq-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  margin-bottom: 10px;
  text-decoration: none;
}
.page-faq .faq-cta:last-child {
  margin-bottom: 0;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-cats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }
  .page-faq .faq-quick-head {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.8fr);
    align-items: end;
    gap: 24px;
  }
  .page-faq .faq-item summary {
    padding: 16px 20px;
    gap: 16px;
  }
  .page-faq .faq-item .faq-steps {
    padding: 16px 20px 18px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero-inner {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.85fr);
    align-items: start;
  }
  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
  }
  .page-faq .faq-support-inner {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.8fr);
  }
  .page-faq .faq-contact {
    position: sticky;
    top: 108px;
  }
}

@media (min-width: 1140px) {
  .page-faq .faq-cats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-cat,
  .page-faq .faq-item,
  .page-faq .faq-filter .filter-btn {
    transition: none;
  }
  .page-faq .faq-cat:hover,
  .page-faq .faq-cat:focus-within {
    transform: none;
  }
  .page-faq .is-flash {
    animation: none;
  }
}
<<<END>>>