.page-faq {
  --faq-line: rgba(53, 224, 240, 0.2);
  --faq-line-soft: rgba(169, 188, 207, 0.14);
  --faq-panel: rgba(18, 48, 79, 0.55);
  --faq-index-w: 200px;

  background: var(--ink-950);
  color: var(--paper-white);
  font-family: var(--font-body);
  padding-bottom: 4.5rem;
}

/* ---------- 面包屑 ---------- */
.page-faq .faq-crumb {
  padding-top: 1.4rem;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--slate-300);
}

.page-faq .faq-crumb .crumb-link {
  color: var(--slate-300);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

.page-faq .faq-crumb .crumb-sep {
  margin: 0 0.65em;
  color: var(--signal-orange);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  margin-top: 1.1rem;
  padding: 2.6rem 0 3rem;
  background:
    radial-gradient(880px 380px at 6% -18%, rgba(53, 224, 240, 0.2), transparent 62%),
    radial-gradient(660px 320px at 100% 0%, rgba(255, 122, 47, 0.14), transparent 68%),
    linear-gradient(158deg, rgba(18, 48, 79, 0.9) 0%, rgba(10, 26, 47, 0.55) 100%);
  border-top: 1px solid var(--faq-line);
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--faq-line-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--faq-line-soft) 1px, transparent 1px);
  background-size: 92px 92px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.7), transparent 82%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.7), transparent 82%);
}

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

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

.page-faq .faq-h1 {
  margin: 0.9rem 0 0;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(2rem, 6.6vw, 4.1rem);
  line-height: 1.14;
  letter-spacing: -0.02em;
  max-width: 22ch;
  color: var(--paper-white);
}

.page-faq .faq-lede {
  margin: 1.15rem 0 0;
  max-width: 44ch;
  font-size: 1rem;
  line-height: 1.88;
  color: var(--slate-300);
}

.page-faq .faq-hero-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 1px;
  margin-top: 2.1rem;
  max-width: 660px;
  border: 1px solid var(--faq-line);
  background: var(--faq-line);
}

.page-faq .faq-hero-cell {
  flex: 1 1 168px;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding: 1rem 1.1rem;
  background: var(--ink-950);
}

.page-faq .faq-hero-cell .stat-num {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(1.05rem, 5.4vw, 1.5rem);
  letter-spacing: 0.02em;
  color: var(--signal-cyan);
  font-feature-settings: "tnum";
}

.page-faq .faq-hero-cell-label {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--slate-300);
}

/* ---------- 主体双栏 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2rem;
  margin-top: 2.4rem;
}

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

.page-faq .faq-index-label {
  color: var(--slate-300);
}

.page-faq .faq-index-list {
  list-style: none;
  margin: 0.85rem 0 0;
  padding: 0 0 0.4rem;
  border-left: 1px solid var(--faq-line);
}

.page-faq .faq-index-list li {
  margin: 0;
}

.page-faq .faq-index-link {
  display: block;
  margin-left: -1px;
  padding: 0.5rem 0 0.5rem 0.95rem;
  border-left: 2px solid transparent;
  font-size: 14px;
  color: var(--slate-300);
  text-decoration: none;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.page-faq .faq-index-link:hover,
.page-faq .faq-index-link:focus-visible {
  color: var(--signal-cyan);
  border-left-color: var(--signal-cyan);
}

/* ---------- 章节通用 ---------- */
.page-faq .faq-section {
  margin-top: 3rem;
  scroll-margin-top: 5.5rem;
}

.page-faq .faq-section:first-child {
  margin-top: 0;
}

.page-faq .faq-head {
  padding-top: 1.3rem;
  border-top: 1px solid var(--faq-line);
  margin-bottom: 1.4rem;
}

.page-faq .faq-head--flush {
  border-top-color: var(--faq-line-soft);
}

.page-faq .faq-code {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--signal-orange);
  background: rgba(255, 122, 47, 0.09);
  border: 1px solid rgba(255, 122, 47, 0.45);
  border-radius: var(--radius);
  padding: 0.15rem 0.5rem;
}

.page-faq .faq-title {
  margin: 0.85rem 0 0;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.4rem, 4.4vw, 2.1rem);
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--paper-white);
}

.page-faq .faq-sub {
  margin: 0.6rem 0 0;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.82;
  color: var(--slate-300);
}

/* ---------- 自检清单 ---------- */
.page-faq .faq-check-list {
  list-style: none;
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  border: 1px solid var(--faq-line);
  background: var(--faq-line);
}

.page-faq .faq-check-item {
  margin: 0;
  background: var(--faq-panel);
}

.page-faq .faq-check {
  display: flex;
  align-items: flex-start;
  gap: 0.9rem;
  padding: 1.1rem 1.15rem;
  cursor: pointer;
  transition: background 0.2s ease;
}

.page-faq .faq-check:hover {
  background: rgba(53, 224, 240, 0.06);
}

.page-faq .faq-check-input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-faq .faq-check-box {
  position: relative;
  flex: 0 0 auto;
  width: 20px;
  height: 20px;
  margin-top: 2px;
  border: 1px solid var(--faq-line);
  border-radius: var(--radius);
  background: rgba(10, 26, 47, 0.55);
  transition: border-color 0.18s ease, background 0.18s ease;
}

.page-faq .faq-check-box::after {
  content: "";
  position: absolute;
  left: 6px;
  top: 2px;
  width: 6px;
  height: 11px;
  border-right: 2px solid var(--state-mint);
  border-bottom: 2px solid var(--state-mint);
  transform: rotate(42deg);
  opacity: 0;
  transition: opacity 0.16s ease;
}

.page-faq .faq-check-input:checked + .faq-check-box {
  border-color: var(--state-mint);
  background: rgba(127, 227, 196, 0.12);
}

.page-faq .faq-check-input:checked + .faq-check-box::after {
  opacity: 1;
}

.page-faq .faq-check-input:focus-visible + .faq-check-box {
  outline: 2px solid var(--signal-cyan);
  outline-offset: 2px;
}

.page-faq .faq-check-text {
  min-width: 0;
}

.page-faq .faq-check-title {
  display: block;
  font-size: 15px;
  font-weight: 600;
  color: var(--paper-white);
  transition: color 0.18s ease;
}

.page-faq .faq-check-input:checked ~ .faq-check-text .faq-check-title {
  color: var(--state-mint);
}

.page-faq .faq-check-desc {
  display: block;
  margin-top: 0.35rem;
  font-size: 14px;
  line-height: 1.82;
  color: var(--slate-300);
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-accordion {
  border-top: 1px solid var(--faq-line);
}

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

.page-faq .faq-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: transparent;
  transition: background 0.25s ease;
}

.page-faq .faq-item:has(.faq-trigger[aria-expanded="true"])::before {
  background: var(--signal-cyan);
}

.page-faq .faq-trigger {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  width: 100%;
  padding: 1.15rem 0 1.15rem 1.1rem;
  background: none;
  border: 0;
  font-family: inherit;
  font-size: 0.95rem;
  line-height: 1.72;
  text-align: left;
  color: var(--paper-white);
  cursor: pointer;
  transition: color 0.2s ease;
}

.page-faq .faq-trigger:hover {
  color: var(--signal-cyan);
}

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

.page-faq .faq-trigger::after {
  content: "";
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  margin: 9px 0 0 auto;
  border-right: 1.5px solid var(--slate-300);
  border-bottom: 1.5px solid var(--slate-300);
  transform: rotate(45deg);
  transition: transform 0.25s ease, border-color 0.2s ease;
}

.page-faq .faq-trigger[aria-expanded="true"]::after {
  transform: rotate(-135deg);
  border-color: var(--signal-cyan);
}

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

.page-faq .faq-tag {
  flex: 0 0 auto;
  margin-top: 3px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--signal-cyan);
  background: rgba(53, 224, 240, 0.09);
  border: 1px solid var(--faq-line);
  border-radius: var(--radius);
  padding: 0.15rem 0.42rem;
}

.page-faq .faq-panel {
  padding: 0 1.1rem 1.4rem 1.1rem;
}

.page-faq .faq-panel[hidden] {
  display: none;
}

.page-faq .faq-answer-lead {
  margin: 0 0 0.65rem;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.78;
  color: var(--state-mint);
  max-width: 40em;
}

.page-faq .faq-panel p {
  margin: 0 0 0.7rem;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--slate-300);
}

.page-faq .faq-steps {
  counter-reset: step;
  list-style: none;
  margin: 0 0 0.7rem;
  padding: 0;
}

.page-faq .faq-steps li {
  counter-increment: step;
  position: relative;
  margin: 0 0 0.5rem;
  padding-left: 2rem;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--slate-300);
}

.page-faq .faq-steps li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0.16rem;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--signal-orange);
}

.page-faq .faq-more {
  margin: 0.35rem 0 0;
}

.page-faq .faq-more-link {
  font-size: 14px;
  color: var(--signal-cyan);
  text-decoration: none;
  border-bottom: 1px dashed rgba(53, 224, 240, 0.5);
  padding-bottom: 1px;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-faq .faq-more-link:hover,
.page-faq .faq-more-link:focus-visible {
  color: var(--signal-orange);
  border-bottom-color: var(--signal-orange);
}

/* ---------- 图片 ---------- */
.page-faq .faq-figure {
  margin: 1.5rem 0 0;
  width: 100%;
}

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

.page-faq .faq-figcaption {
  margin-top: 0.7rem;
  font-size: 13px;
  line-height: 1.75;
  color: var(--slate-300);
  max-width: 46ch;
}

/* ---------- 分组底链 ---------- */
.page-faq .faq-group-foot {
  margin: 1.1rem 0 0;
}

.page-faq .faq-foot-link {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--signal-cyan);
  text-decoration: none;
  border: 1px solid var(--faq-line);
  border-radius: var(--radius);
  padding: 0.45rem 0.8rem;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.page-faq .faq-foot-link:hover,
.page-faq .faq-foot-link:focus-visible {
  color: var(--ink-950);
  background: var(--signal-cyan);
  border-color: var(--signal-cyan);
}

/* ---------- 联系区块 ---------- */
.page-faq .faq-section--contact {
  margin-top: 3.8rem;
}

.page-faq .faq-contact {
  padding: 1.5rem 1.25rem 1.8rem;
  border: 1px solid var(--faq-line);
  background:
    radial-gradient(560px 260px at 100% 0%, rgba(53, 224, 240, 0.12), transparent 70%),
    linear-gradient(158deg, rgba(18, 48, 79, 0.72) 0%, rgba(10, 26, 47, 0.55) 100%);
}

.page-faq .faq-contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
  margin-top: 0.5rem;
}

.page-faq .faq-contact-card {
  padding: 1.15rem 1.15rem 1.3rem;
}

.page-faq .faq-contact-eyebrow {
  color: var(--signal-cyan);
}

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

.page-faq .faq-contact-list {
  list-style: none;
  margin: 0.75rem 0 0;
  padding: 0;
}

.page-faq .faq-contact-list li {
  position: relative;
  margin: 0 0 0.5rem;
  padding-left: 1rem;
  font-size: 14px;
  line-height: 1.78;
  color: var(--paper-white);
}

.page-faq .faq-contact-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 5px;
  height: 5px;
  background: var(--signal-cyan);
  transform: rotate(45deg);
}

.page-faq .faq-contact-card--paper {
  color: var(--ink-950);
}

.page-faq .faq-contact-line {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 0.35rem 0.7rem;
  margin: 0.75rem 0 0;
  font-size: 14px;
  line-height: 1.75;
}

.page-faq .faq-contact-key {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--ink-700);
  border: 1px solid rgba(23, 69, 111, 0.35);
  border-radius: var(--radius);
  padding: 0.1rem 0.4rem;
}

.page-faq .faq-contact-line a {
  color: var(--ink-950);
  text-decoration: none;
  border-bottom: 1px solid rgba(10, 26, 47, 0.35);
  word-break: break-all;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-faq .faq-contact-line a:hover,
.page-faq .faq-contact-line a:focus-visible {
  color: var(--ink-700);
  border-bottom-color: var(--ink-700);
}

.page-faq .faq-contact-note {
  margin: 1rem 0 0;
  font-size: 13px;
  line-height: 1.78;
  color: rgba(10, 26, 47, 0.72);
}

.page-faq .faq-contact-cta {
  margin: 1.35rem 0 0;
}

/* ---------- 桌面端 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-trigger {
    font-size: 1.05rem;
  }

  .page-faq .faq-hero {
    padding: 3.2rem 0 3.6rem;
  }

  .page-faq .faq-contact {
    padding: 1.9rem 1.8rem 2.1rem;
  }
}

@media (min-width: 720px) {
  .page-faq .faq-contact-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }
}

@media (min-width: 940px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    gap: 3.4rem;
    margin-top: 3.2rem;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 5.5rem;
    align-self: start;
  }

  .page-faq .faq-section {
    margin-top: 3.8rem;
  }

  .page-faq .faq-figure {
    max-width: 720px;
  }

  .page-faq .faq-figure--tall {
    max-width: 560px;
  }
}

/* ---------- 窄屏 ---------- */
@media (max-width: 939px) {
  .page-faq .faq-index-list {
    display: flex;
    gap: 0.5rem;
    overflow-x: auto;
    border-left: 0;
    padding-bottom: 0.5rem;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

  .page-faq .faq-index-list::-webkit-scrollbar {
    display: none;
  }

  .page-faq .faq-index-link {
    margin-left: 0;
    white-space: nowrap;
    padding: 0.45rem 0.8rem;
    border: 1px solid var(--faq-line);
    border-left-width: 1px;
    border-radius: var(--radius);
    font-size: 13px;
  }
}

@media (max-width: 480px) {
  .page-faq .faq-h1 {
    font-size: 1.85rem;
  }

  .page-faq .faq-hero-cell {
    flex: 1 1 100%;
  }

  .page-faq .faq-trigger {
    padding-left: 0.85rem;
    gap: 0.55rem;
  }

  .page-faq .faq-panel {
    padding-left: 0.85rem;
    padding-right: 0.85rem;
  }

  .page-faq .faq-tag {
    font-size: 10px;
    padding: 0.12rem 0.35rem;
  }
}
<<<END>>>