.page-faq {
  --faq-gap: clamp(14px, 2vw, 20px);
  --faq-soft: rgba(47, 155, 255, 0.06);
  padding-bottom: clamp(56px, 8vw, 104px);
  background:
    radial-gradient(900px 420px at 88% -120px, rgba(200, 16, 46, 0.16), transparent 66%),
    radial-gradient(760px 400px at -10% 12%, rgba(47, 155, 255, 0.09), transparent 62%),
    var(--bg);
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-top: clamp(18px, 3vw, 30px);
  font-size: var(--fs-xs);
  letter-spacing: 0.14em;
  color: var(--muted);
}
.page-faq .breadcrumbs a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--ease), border-color var(--ease);
}
.page-faq .breadcrumbs a:hover,
.page-faq .breadcrumbs a:focus-visible {
  color: var(--blue);
  border-bottom-color: var(--blue);
}
.page-faq .breadcrumbs a:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  display: grid;
  gap: var(--faq-gap);
  padding-block: clamp(30px, 5.5vw, 60px) clamp(26px, 4vw, 44px);
  border-bottom: 1px solid var(--line);
}
.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: clamp(72px, 16vw, 200px);
  height: 3px;
  background: linear-gradient(90deg, var(--red) 0 38%, var(--blue) 38% 70%, var(--green) 70% 100%);
}
.page-faq .faq-hero h1 {
  margin: 0;
  font-size: var(--fs-4xl);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--white);
  max-width: 19ch;
  text-wrap: balance;
}
.page-faq .faq-lede {
  margin: 0;
  max-width: 62ch;
  font-size: var(--fs-md);
  line-height: 1.8;
  color: var(--ink);
}

.page-faq .faq-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(8px, 1.6vw, 16px);
  background: var(--line);
  border: 1px solid var(--line);
  clip-path: var(--clip-cut);
}
.page-faq .faq-metric {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 14px 16px;
  background: var(--panel);
}
.page-faq .faq-metric-value {
  font-family: var(--font-mono);
  font-size: clamp(22px, 4.6vw, 34px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--white);
}
.page-faq .faq-metric:nth-child(1) .faq-metric-value { color: var(--green); }
.page-faq .faq-metric:nth-child(2) .faq-metric-value { color: var(--blue); }
.page-faq .faq-metric:nth-child(3) .faq-metric-value { color: var(--amber); }
.page-faq .faq-metric-label {
  font-size: var(--fs-xs);
  letter-spacing: 0.12em;
  color: var(--muted);
}

/* ---------- 通用小节 ---------- */
.page-faq .faq-sec {
  padding-block: clamp(38px, 6vw, 72px);
}
.page-faq .sec-lede {
  margin: 10px 0 0;
  max-width: 60ch;
  font-size: var(--fs-sm);
  line-height: 1.85;
  color: var(--muted);
}
.page-faq .faq-steps {
  padding-block: clamp(40px, 6.5vw, 78px);
  border-block: 1px solid var(--line);
  background-color: rgba(20, 23, 29, 0.5);
}

/* ---------- 五件事清单 ---------- */
.page-faq .quick-list {
  list-style: none;
  display: grid;
  gap: 1px;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  background: var(--line);
  border: 1px solid var(--line);
  clip-path: var(--clip-cut);
}
.page-faq .quick-list li {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 18px 18px 20px;
  background: var(--panel);
  transition: background var(--ease);
}
.page-faq .quick-list li:hover {
  background: var(--panel-hi);
}
.page-faq .quick-idx {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 30px;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--blue);
  border: 1px solid var(--line-hi);
  clip-path: var(--clip-cut-sm);
}
.page-faq .quick-body h3 {
  margin: 4px 0 6px;
  font-size: var(--fs-sm);
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--white);
}
.page-faq .quick-body p {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 三步图示 ---------- */
.page-faq .step-figure {
  margin: clamp(22px, 3vw, 32px) 0 0;
  border: 1px solid var(--line);
  background: var(--panel);
  clip-path: var(--clip-cut);
  overflow: hidden;
}
.page-faq .step-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 7 / 4;
  filter: saturate(0.94) contrast(1.04);
}
.page-faq .step-figure figcaption {
  padding: 12px 16px 14px;
  font-size: var(--fs-xs);
  letter-spacing: 0.12em;
  color: var(--muted);
  border-top: 1px solid var(--line);
  background: var(--panel-hi);
}

.page-faq .step-track {
  list-style: none;
  display: grid;
  gap: 12px;
  margin: clamp(22px, 3vw, 30px) 0 0;
  padding: 0;
}
.page-faq .step-node {
  position: relative;
  padding: 22px 18px 18px;
  background: var(--panel);
  border: 1px solid var(--line);
  clip-path: var(--clip-cut);
  transition: transform var(--ease), border-color var(--ease), background var(--ease);
}
.page-faq .step-node::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--red), var(--red-deep));
}
.page-faq .step-node:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
}
.page-faq .step-num {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--red);
}
.page-faq .step-node h3 {
  margin: 8px 0 8px;
  font-size: var(--fs-lg);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--white);
}
.page-faq .step-node p {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.8;
  color: var(--ink);
}
.page-faq .step-note {
  margin-top: 12px;
  padding-left: 12px;
  font-size: var(--fs-xs);
  line-height: 1.7;
  color: var(--muted);
  border-left: 2px solid var(--line-hi);
  transition: border-color var(--ease), color var(--ease);
}

/* ---------- 分组提示条 ---------- */
.page-faq .group-hint {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: clamp(20px, 3vw, 28px) 0 14px;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.16em;
  color: var(--muted);
}
.page-faq .hint-sep {
  color: var(--red);
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-list {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  clip-path: var(--clip-cut);
}
.page-faq .faq-item {
  background: var(--panel);
}
.page-faq .faq-item + .faq-item {
  border-top: 0;
}
.page-faq .faq-item summary {
  position: relative;
  display: block;
  padding: 16px 52px 16px 18px;
  font-size: var(--fs-md);
  font-weight: 600;
  line-height: 1.55;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
  transition: color var(--ease), background var(--ease);
}
.page-faq .faq-item summary::-webkit-details-marker { display: none; }
.page-faq .faq-item summary::marker { content: ""; }
.page-faq .faq-item summary:hover {
  color: var(--white);
  background: var(--panel-hi);
}
.page-faq .faq-item summary:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: -2px;
}
.page-faq .faq-item summary::after {
  content: "";
  position: absolute;
  right: 22px;
  top: 50%;
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--blue);
  border-bottom: 2px solid var(--blue);
  transform: translateY(-72%) rotate(45deg);
  transition: transform var(--ease), border-color var(--ease);
}
.page-faq .faq-item[open] summary {
  color: var(--white);
}
.page-faq .faq-item[open] summary::after {
  transform: translateY(-28%) rotate(-135deg);
  border-color: var(--green);
}
.page-faq .faq-answer {
  padding: 0 18px 20px;
  border-top: 1px solid var(--line);
}
.page-faq .faq-answer p {
  margin: 14px 0 0;
  max-width: 66ch;
  font-size: var(--fs-sm);
  line-height: 1.9;
  color: var(--muted);
}
.page-faq .faq-answer a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 155, 255, 0.45);
  transition: border-color var(--ease), color var(--ease);
}
.page-faq .faq-answer a:hover,
.page-faq .faq-answer a:focus-visible {
  color: var(--white);
  border-bottom-color: var(--white);
}
.page-faq .faq-answer a:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
}
.page-faq .kw {
  color: var(--white);
  font-weight: 600;
  padding-bottom: 1px;
  border-bottom: 2px solid var(--blue);
}
.page-faq .faq-item[open] .faq-answer {
  animation: faq-open 180ms cubic-bezier(.4, 0, .2, 1);
}
@keyframes faq-open {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- 设备对照 ---------- */
.page-faq .device-pair {
  display: grid;
  gap: var(--faq-gap);
  margin-top: clamp(22px, 3vw, 30px);
}
.page-faq .device-card {
  position: relative;
  padding: 20px 18px 20px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 3px solid var(--blue);
  clip-path: var(--clip-cut);
}
.page-faq .device-card--alt {
  border-left-color: var(--amber);
}
.page-faq .device-tag {
  display: inline-block;
  margin: 0 0 10px;
  font-size: var(--fs-xs);
  letter-spacing: 0.16em;
}
.page-faq .device-card h3 {
  margin: 0 0 8px;
  font-size: var(--fs-lg);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--white);
}
.page-faq .device-card p {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.85;
  color: var(--muted);
}
.page-faq .device-figure {
  margin: clamp(18px, 2.6vw, 26px) 0 0;
  border: 1px solid var(--line);
  background: var(--panel);
  clip-path: var(--clip-cut);
  overflow: hidden;
}
.page-faq .device-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 3 / 2;
  filter: saturate(0.92);
}
.page-faq .device-figure figcaption {
  padding: 12px 16px 14px;
  font-size: var(--fs-xs);
  letter-spacing: 0.12em;
  color: var(--muted);
  border-top: 1px solid var(--line);
  background: var(--panel-hi);
}
.page-faq .faq-sec--wide .faq-list {
  margin-top: clamp(22px, 3vw, 30px);
}

/* ---------- 客服引导 ---------- */
.page-faq .faq-help {
  padding-block: clamp(38px, 6vw, 68px) 0;
}
.page-faq .help-panel {
  display: grid;
  gap: clamp(22px, 3vw, 34px);
  padding: clamp(24px, 4vw, 40px);
}
.page-faq .help-main h2 {
  margin: 10px 0 0;
}
.page-faq .help-lede {
  margin: 14px 0 0;
  max-width: 58ch;
  font-size: var(--fs-sm);
  line-height: 1.9;
  color: var(--ink);
}
.page-faq .help-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 28px);
}
.page-faq .help-contact {
  padding: 20px 18px 22px;
  background: rgba(10, 12, 16, 0.66);
  border: 1px solid var(--line);
  border-left: 3px solid var(--red);
  clip-path: var(--clip-cut);
}
.page-faq .help-contact-title {
  margin: 0 0 14px;
  font-size: var(--fs-xs);
  letter-spacing: 0.2em;
  color: var(--red);
}
.page-faq .help-contact-line {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 12px;
  margin: 0 0 10px;
  font-size: var(--fs-sm);
  line-height: 1.7;
}
.page-faq .help-contact-key {
  flex: 0 0 42px;
  font-size: var(--fs-xs);
  letter-spacing: 0.14em;
  color: var(--muted);
  padding-top: 3px;
}
.page-faq .help-contact-val {
  color: var(--white);
  word-break: break-word;
}
.page-faq .help-note {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-size: var(--fs-xs);
  line-height: 1.75;
  color: var(--muted);
}
.page-faq .help-aside {
  margin: clamp(18px, 3vw, 26px) 0 0;
  font-size: var(--fs-sm);
  line-height: 1.85;
  color: var(--muted);
}
.page-faq .help-aside a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 155, 255, 0.45);
}
.page-faq .help-aside a:hover,
.page-faq .help-aside a:focus-visible {
  color: var(--white);
  border-bottom-color: var(--white);
}
.page-faq .help-aside a:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
}

/* ---------- 悬停细节（仅指针设备） ---------- */
@media (hover: hover) and (pointer: fine) {
  .page-faq .step-node:hover {
    transform: translateY(-3px);
    border-color: var(--line-hi);
    background: var(--panel-hi);
  }
  .page-faq .step-node:hover .step-note {
    border-left-color: var(--blue);
    color: var(--ink);
  }
  .page-faq .device-card {
    transition: transform var(--ease), border-color var(--ease);
  }
  .page-faq .device-card:hover {
    transform: translateY(-3px);
    border-color: var(--line-hi);
  }
  .page-faq .quick-list li:hover .quick-idx {
    color: var(--green);
    border-color: var(--green);
  }
}

/* ---------- 平板 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-metric {
    padding: 18px 20px 20px;
  }
  .page-faq .quick-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-faq .quick-list li:last-child {
    grid-column: 1 / -1;
  }
  .page-faq .step-track {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: stretch;
  }
  .page-faq .step-node {
    display: flex;
    flex-direction: column;
  }
  .page-faq .step-note {
    margin-top: auto;
  }
  .page-faq .device-pair {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-faq .help-panel {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: start;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 1024px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    column-gap: clamp(28px, 4vw, 56px);
    align-items: end;
  }
  .page-faq .faq-hero .eyebrow,
  .page-faq .faq-hero h1,
  .page-faq .faq-lede {
    grid-column: 1;
  }
  .page-faq .faq-metrics {
    grid-column: 2;
    grid-row: 1 / 4;
    align-self: stretch;
    margin-top: 0;
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-faq .faq-metric {
    justify-content: center;
  }
  .page-faq .quick-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-faq .quick-list li:last-child {
    grid-column: auto;
  }
  .page-faq .faq-sec .wrap {
    max-width: var(--wrap);
  }
  .page-faq .faq-list {
    border-left: 1px solid var(--line);
  }
  .page-faq .faq-item summary {
    padding: 20px 60px 20px 24px;
  }
  .page-faq .faq-answer {
    padding: 0 60px 24px 24px;
  }
  .page-faq .faq-answer p {
    margin-top: 16px;
  }
  .page-faq .step-node {
    padding: 26px 22px 22px;
  }
  .page-faq .device-card {
    padding: 24px 22px;
  }
}

/* ---------- 降低动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .step-node,
  .page-faq .device-card,
  .page-faq .faq-item summary::after,
  .page-faq .faq-item[open] .faq-answer {
    animation: none !important;
    transition: none !important;
    transform: none !important;
  }
  .page-faq .faq-item summary::after {
    transform: translateY(-72%) rotate(45deg) !important;
  }
  .page-faq .faq-item[open] summary::after {
    transform: translateY(-28%) rotate(-135deg) !important;
  }
}
<<<END>>>