.page-faq {
  --faq-hairline: 1px solid var(--grid-line);
  --faq-gap: 20px;
  background: var(--ink);
  color: var(--text);
  font-family: var(--font-body);
  overflow-x: clip;
}

.page-faq h1,
.page-faq h2,
.page-faq h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.22;
}

.page-faq p {
  margin: 0;
}

.page-faq .inline-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 224, 208, 0.45);
}

.page-faq .inline-link:hover {
  color: var(--amber);
  border-bottom-color: var(--amber);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: calc(var(--header-h) + 36px) 0 44px;
  border-bottom: var(--faq-hairline);
  background:
    radial-gradient(110% 70% at 88% 0%, rgba(53, 224, 208, 0.1), transparent 62%),
    radial-gradient(90% 60% at 0% 8%, rgba(242, 176, 60, 0.1), transparent 60%);
}

.page-faq .breadcrumb {
  margin-bottom: 22px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
}

.page-faq .faq-hero-grid {
  display: grid;
  gap: 30px;
  align-items: start;
}

.page-faq .faq-hero-lead h1 {
  margin-top: 10px;
  font-size: var(--fs-44);
}

.page-faq .faq-hero-lead .lead {
  margin-top: 18px;
  max-width: 34em;
  font-size: var(--fs-16);
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-jump {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  background: var(--grid-line);
  border: var(--faq-hairline);
}

.page-faq .faq-jump a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 12px 14px;
  background: var(--ink);
  color: var(--text);
  font-size: var(--fs-14);
  text-decoration: none;
  transition: background var(--speed) var(--ease), color var(--speed) var(--ease);
}

.page-faq .faq-jump a:hover,
.page-faq .faq-jump a:focus-visible {
  background: var(--panel);
  color: var(--amber);
}

.page-faq .jump-num {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  color: var(--muted);
  letter-spacing: 0.06em;
}

.page-faq .faq-jump a:hover .jump-num {
  color: var(--amber);
}

.page-faq .faq-hero-figure .media-frame {
  border: var(--faq-hairline);
}

.page-faq .faq-hero-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.75) brightness(0.9);
}

.page-faq .media-caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  color: var(--muted);
  letter-spacing: 0.04em;
}

/* ---------- 通用分区 ---------- */
.page-faq .faq-sec {
  padding: 48px 0;
  border-bottom: var(--faq-hairline);
}

.page-faq .faq-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-top: 16px;
  border-top: var(--faq-hairline);
  margin-bottom: 26px;
}

.page-faq .faq-num {
  flex: none;
  font-family: var(--font-mono);
  font-size: var(--fs-20);
  line-height: 1;
  color: var(--amber);
  letter-spacing: 0.06em;
}

.page-faq .faq-head h2 {
  font-size: var(--fs-28);
}

.page-faq .faq-note {
  margin-top: 10px;
  max-width: 42em;
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 三步上手 ---------- */
.page-faq .step-track {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--grid-line);
  border: var(--faq-hairline);
}

.page-faq .step {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 20px 24px;
  background: var(--panel);
}

.page-faq .step::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 2px;
  background: var(--amber);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 240ms var(--ease);
}

.page-faq .step:hover::before {
  transform: scaleX(1);
}

.page-faq .step-num {
  font-family: var(--font-mono);
  font-size: var(--fs-28);
  line-height: 1;
  color: var(--amber);
  letter-spacing: 0.04em;
}

.page-faq .step-title {
  font-size: var(--fs-20);
}

.page-faq .step-body {
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .step-arrow {
  margin-top: auto;
  font-family: var(--font-mono);
  font-size: var(--fs-20);
  color: var(--cyan);
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-acc {
  border-top: var(--faq-hairline);
}

.page-faq .qa {
  border-bottom: var(--faq-hairline);
}

.page-faq .qa summary {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 18px 0;
  cursor: pointer;
  list-style: none;
  font-size: var(--fs-16);
  font-weight: 700;
  line-height: 1.55;
  color: var(--text);
  transition: color var(--speed) var(--ease);
}

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

.page-faq .qa summary:hover,
.page-faq .qa[open] summary {
  color: var(--amber);
}

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

.page-faq .qa-icon {
  position: relative;
  flex: none;
  width: 18px;
  height: 18px;
  margin-top: 4px;
}

.page-faq .qa-icon::before,
.page-faq .qa-icon::after {
  content: "";
  position: absolute;
  background: var(--amber);
  transition: transform var(--speed) var(--ease), opacity var(--speed) var(--ease);
}

.page-faq .qa-icon::before {
  left: 0;
  top: 8px;
  width: 18px;
  height: 2px;
}

.page-faq .qa-icon::after {
  left: 8px;
  top: 0;
  width: 2px;
  height: 18px;
}

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

.page-faq .qa-body {
  padding: 0 34px 20px 0;
  font-size: var(--fs-14);
  line-height: 1.78;
  color: var(--muted);
  animation: faq-fade 200ms ease-out both;
}

@keyframes faq-fade {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: none; }
}

/* ---------- 两列问答 ---------- */
.page-faq .qa-grid {
  display: grid;
  gap: 0;
  margin: 0;
}

.page-faq .qa-row {
  display: grid;
  gap: 6px;
  padding: 20px 0;
  border-top: var(--faq-hairline);
}

.page-faq .qa-row:last-child {
  border-bottom: var(--faq-hairline);
}

.page-faq .qa-row dt {
  font-size: var(--fs-16);
  font-weight: 700;
  line-height: 1.5;
  color: var(--text);
}

.page-faq .qa-row dd {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 导出 ---------- */
.page-faq .export-layout {
  display: grid;
  gap: 28px;
  align-items: start;
}

.page-faq .export-panel {
  border: var(--faq-hairline);
  background: var(--panel);
}

.page-faq .export-panel .panel-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  padding: 14px 16px;
  border-bottom: var(--faq-hairline);
}

.page-faq .export-panel .panel-title {
  font-size: var(--fs-16);
  font-family: var(--font-display);
  font-weight: 800;
}

.page-faq .export-panel .panel-meta {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  color: var(--cyan);
  letter-spacing: 0.04em;
}

.page-faq .table-scroll {
  overflow-x: auto;
}

.page-faq .data-table {
  width: 100%;
  min-width: 460px;
  border-collapse: collapse;
  font-size: var(--fs-14);
}

.page-faq .data-table th {
  padding: 10px 14px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  border-bottom: var(--faq-hairline);
  white-space: nowrap;
}

.page-faq .data-table td {
  padding: 12px 14px;
  line-height: 1.6;
  color: var(--text);
  border-bottom: var(--faq-hairline);
}

.page-faq .data-table tbody tr:last-child td {
  border-bottom: 0;
}

.page-faq .data-table td.is-num {
  font-family: var(--font-mono);
  color: var(--amber);
  letter-spacing: 0.04em;
}

.page-faq .data-table tbody tr:hover td {
  background: rgba(242, 176, 60, 0.06);
}

/* ---------- 提示条 ---------- */
.page-faq .tip {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 14px;
  margin-top: 26px;
  padding: 16px 18px;
  border-left: 3px solid var(--cyan);
  background: rgba(53, 224, 208, 0.06);
}

.page-faq .tip-label {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: var(--cyan);
  text-transform: uppercase;
}

.page-faq .tip p {
  flex: 1 1 260px;
  font-size: var(--fs-14);
  line-height: 1.72;
  color: var(--text);
}

/* ---------- 账号与设备 ---------- */
.page-faq .device-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: var(--faq-hairline);
}

.page-faq .device-list li {
  position: relative;
  padding: 14px 0 14px 22px;
  border-bottom: var(--faq-hairline);
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .device-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 22px;
  width: 9px;
  height: 2px;
  background: var(--amber);
}

/* ---------- 收束色带 ---------- */
.page-faq .faq-cta {
  position: relative;
  overflow: hidden;
  border-bottom: var(--faq-hairline);
  background: var(--ink-deep);
}

.page-faq .faq-cta-bg {
  position: absolute;
  inset: 0;
}

.page-faq .faq-cta-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.32;
  filter: grayscale(0.7) brightness(0.65);
}

.page-faq .faq-cta-inner {
  position: relative;
  padding: 56px 0;
  text-align: center;
}

.page-faq .faq-cta-inner h2 {
  font-size: var(--fs-28);
}

.page-faq .faq-cta-inner p {
  max-width: 40em;
  margin: 14px auto 0;
  font-size: var(--fs-14);
  line-height: 1.78;
  color: var(--muted);
}

.page-faq .btn-cta {
  margin-top: 24px;
}

/* ---------- 返回顶部 ---------- */
.page-faq .faq-totop {
  position: fixed;
  right: 16px;
  bottom: 20px;
  z-index: 5;
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border: var(--faq-hairline);
  background: rgba(11, 18, 32, 0.9);
  color: var(--amber);
  font-family: var(--font-mono);
  font-size: var(--fs-16);
  text-decoration: none;
  transition: border-color var(--speed) var(--ease);
}

.page-faq .faq-totop:hover {
  border-color: var(--amber);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-jump {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .step-track {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-hero {
    padding-top: calc(var(--header-h) + 48px);
  }

  .page-faq .faq-sec {
    padding: 60px 0;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero {
    padding: calc(var(--header-h) + 64px) 0 64px;
  }

  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 56px;
  }

  .page-faq .faq-hero-lead h1 {
    font-size: var(--fs-44);
  }

  .page-faq .qa-row {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    gap: 30px;
    align-items: baseline;
  }

  .page-faq .export-layout {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 40px;
  }

  .page-faq .faq-cta-inner {
    padding: 80px 0;
  }

  .page-faq .faq-totop {
    right: 28px;
    bottom: 28px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa-body,
  .page-faq .step::before,
  .page-faq .qa-icon::before,
  .page-faq .qa-icon::after {
    animation: none;
    transition: none;
  }
}