/* ===== 帮助中心 · 页面专属样式 ===== */
.page-faq {
  --faq-line: var(--grid);
  --faq-sunken: #101419;
  background: var(--ink);
  color: var(--text);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(40px, 7vw, 88px) 0 clamp(36px, 5vw, 64px);
  border-bottom: 1px solid var(--faq-line);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--faq-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--faq-line) 1px, transparent 1px);
  background-size: 84px 84px;
  opacity: 0.34;
  -webkit-mask-image: radial-gradient(120% 90% at 18% 0%, #000 0%, transparent 72%);
  mask-image: radial-gradient(120% 90% at 18% 0%, #000 0%, transparent 72%);
  pointer-events: none;
}

.page-faq .hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
  align-items: start;
}

.page-faq .faq-hero .breadcrumb {
  margin-bottom: var(--s22);
  font-size: 0.8125rem;
  letter-spacing: 0.02em;
}

.page-faq .hero-kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--s12);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--green);
}

.page-faq h1 {
  margin: var(--s15) 0 0;
  font-size: clamp(2.1rem, 5.4vw, 3.9rem);
  font-weight: 300;
  line-height: 1.1;
  letter-spacing: -0.02em;
  max-width: 15em;
}

.page-faq .hero-copy .lead {
  margin: var(--s22) 0 0;
  max-width: 38em;
  color: var(--muted);
  font-size: var(--s18);
  line-height: 1.75;
}

.page-faq .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: var(--s28);
}

.page-faq .hero-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: var(--s36) 0 0;
  padding: 0;
  background: var(--faq-line);
  border: 1px solid var(--faq-line);
}

.page-faq .hero-fact {
  background: var(--ink);
  padding: 14px 16px;
}

.page-faq .hero-fact dt {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  color: var(--muted);
  text-transform: uppercase;
}

.page-faq .hero-fact dd {
  margin: 6px 0 0;
  font-size: var(--s18);
  color: var(--text);
}

.page-faq .hero-fact .num {
  font-family: var(--font-mono);
  color: var(--green);
  font-size: var(--s22);
  letter-spacing: -0.01em;
}

.page-faq .hero-media {
  align-self: start;
  border: 1px solid var(--faq-line);
}

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

@media (min-width: 900px) {
  .page-faq .hero-inner {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: var(--col-gap);
    align-items: end;
  }
  .page-faq .hero-copy {
    grid-column: 1 / span 8;
  }
  .page-faq .hero-media {
    grid-column: 9 / span 4;
    margin-bottom: 2px;
  }
  .page-faq .hero-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 索引 + 问答流 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 40px;
  padding: clamp(40px, 6vw, 76px) 0 clamp(48px, 7vw, 96px);
}

.page-faq .index-label {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

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

.page-faq .faq-index-list a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--faq-line);
  color: var(--muted);
  font-size: 0.875rem;
  text-decoration: none;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-faq .faq-index-list a .num {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--green);
}

.page-faq .faq-index-list a:hover {
  color: var(--text);
  border-color: var(--blue);
}

.page-faq .faq-index-list a:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
}

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

.page-faq .faq-chapter {
  padding-bottom: clamp(32px, 4vw, 52px);
  margin-bottom: clamp(32px, 4vw, 52px);
  border-bottom: 1px solid var(--faq-line);
  scroll-margin-top: 120px;
}

.page-faq .faq-chapter:last-child {
  border-bottom: 0;
  margin-bottom: 0;
  padding-bottom: 0;
}

.page-faq .faq-chapter .chapter-title {
  margin-top: var(--s12);
  max-width: 24em;
}

.page-faq .faq-intro {
  margin: var(--s15) 0 var(--s22);
  max-width: 38em;
  color: var(--muted);
  line-height: 1.75;
}

/* ---------- 问答条 ---------- */
.page-faq .qa-list {
  border-top: 1px solid var(--faq-line);
}

.page-faq .qa {
  border-bottom: 1px solid var(--faq-line);
  transition: background 0.2s var(--ease);
}

.page-faq .qa[open] {
  background: var(--faq-sunken);
  box-shadow: inset 2px 0 0 var(--green);
}

.page-faq .qa-q {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  font-size: 1.0625rem;
  font-weight: 600;
  line-height: 1.55;
  color: var(--text);
  transition: color 0.2s var(--ease);
}

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

.page-faq .qa-q::after {
  content: "+";
  margin-left: auto;
  flex: none;
  font-family: var(--font-mono);
  font-size: 1.15rem;
  line-height: 1;
  color: var(--muted);
}

.page-faq .qa[open] .qa-q::after {
  content: "–";
  color: var(--green);
}

.page-faq .qa-q:hover {
  color: var(--green);
}

.page-faq .qa-q:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: -2px;
}

.page-faq .qa-num {
  flex: none;
  min-width: 2.6rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.page-faq .qa[open] .qa-num {
  color: var(--green);
}

.page-faq .qa-a {
  padding: 0 18px 20px calc(18px + 2.6rem + 12px);
  max-width: 46em;
}

.page-faq .qa-a p {
  margin: 0;
  color: var(--muted);
  font-size: var(--s15);
  line-height: 1.8;
}

.page-faq .qa-a p + p {
  margin-top: 12px;
}

.page-faq .qa-a a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s var(--ease);
}

.page-faq .qa-a a:hover {
  border-bottom-color: var(--blue);
}

.page-faq .qa-a a:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
}

.page-faq .qa-more {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
}

/* ---------- 数据章节配图 ---------- */
.page-faq .faq-figure {
  margin: var(--s28) 0 0;
  border: 1px solid var(--faq-line);
}

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

.page-faq .faq-figure figcaption {
  position: static;
  padding: 12px 14px;
  border-top: 1px solid var(--faq-line);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--muted);
}

/* ---------- 底部联系色带 ---------- */
.page-faq .faq-cta {
  border-top: 1px solid var(--green);
  background: linear-gradient(180deg, var(--green-deep) 0%, var(--ink) 86%);
  padding: clamp(36px, 5.5vw, 68px) 0;
  scroll-margin-top: 120px;
}

.page-faq .faq-cta-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  align-items: center;
}

.page-faq .faq-cta-kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--green);
}

.page-faq .faq-cta-copy h2 {
  margin: 10px 0 12px;
  font-size: clamp(1.35rem, 2.4vw, 2rem);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.01em;
  max-width: 20em;
}

.page-faq .faq-cta-copy p {
  margin: 0;
  max-width: 42em;
  color: var(--muted);
  line-height: 1.75;
}

.page-faq .faq-cta-action {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

@media (min-width: 860px) {
  .page-faq .faq-cta-inner {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 48px;
  }
  .page-faq .faq-cta-action {
    justify-content: flex-end;
  }
}

/* ---------- 桌面：左索引右问答 ---------- */
@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(190px, 250px) minmax(0, 1fr);
    gap: 56px;
  }
  .page-faq .faq-index {
    position: sticky;
    top: 104px;
    align-self: start;
  }
  .page-faq .faq-index-list {
    display: block;
    gap: 0;
  }
  .page-faq .faq-index-list li {
    border-top: 1px solid var(--faq-line);
  }
  .page-faq .faq-index-list li:last-child {
    border-bottom: 1px solid var(--faq-line);
  }
  .page-faq .faq-index-list a {
    border: 0;
    padding: 14px 0 14px 12px;
    position: relative;
  }
  .page-faq .faq-index-list a::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: transparent;
    transition: background 0.2s var(--ease);
  }
  .page-faq .faq-index-list a:hover::before {
    background: var(--green);
  }
  .page-faq .faq-q {
    padding: 20px 22px;
    font-size: var(--s18);
  }
  .page-faq .qa-a {
    padding: 0 22px 24px calc(22px + 2.6rem + 12px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .qa-q,
  .page-faq .faq-index-list a,
  .page-faq .faq-index-list a::before,
  .page-faq .qa-a a {
    transition: none;
  }
}
<<<END>>>