.page-faq {
  --faq-line: #1E3A5F;
  --faq-panel: #12294A;
  --faq-pad: clamp(18px, 4vw, 28px);
  padding-bottom: 0;
}

/* 面包屑 */
.page-faq .faq-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-top: 26px;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--muted);
}
.page-faq .faq-crumb a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s ease, border-color .2s ease;
}
.page-faq .faq-crumb a:hover,
.page-faq .faq-crumb a:focus-visible {
  color: var(--path);
  border-bottom-color: var(--path-deep);
}
.page-faq .faq-crumb .sep {
  color: var(--line-600);
}

/* 首屏 */
.page-faq .faq-masthead {
  padding: 26px 0 44px;
  border-bottom: 1px solid var(--faq-line);
}
.page-faq .faq-masthead .index-text {
  color: var(--signal);
  margin: 0 0 14px;
}
.page-faq .faq-masthead h1 {
  margin: 0;
  color: var(--text);
}
.page-faq .faq-masthead__lede {
  max-width: 62ch;
  margin: 18px 0 0;
  color: var(--muted);
}
.page-faq .faq-stats {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--faq-line);
  border: 1px solid var(--faq-line);
}
.page-faq .faq-stat {
  background: var(--ink-900);
  padding: 18px 16px 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.page-faq .faq-stat__num {
  font-size: clamp(22px, 5vw, 30px);
  line-height: 1;
  color: var(--path);
}
.page-faq .faq-stat__label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--muted);
}

/* 粘性控制台 */
.page-faq .faq-console {
  position: sticky;
  top: var(--bar-h-min);
  z-index: 6;
  background: rgba(10, 26, 47, .95);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--faq-line);
}
.page-faq .faq-console__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 16px;
  padding-top: 10px;
  padding-bottom: 10px;
}
.page-faq .faq-console__state {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  min-width: 0;
}
.page-faq .faq-console__text {
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--muted);
}
.page-faq .faq-console__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.page-faq .faq-export {
  cursor: pointer;
  font-family: inherit;
}

/* 章节骨架 */
.page-faq .faq-section {
  padding: 54px 0 60px;
  border-bottom: 1px solid var(--faq-line);
}
.page-faq .faq-sec-head {
  display: grid;
  gap: 12px;
  margin-bottom: 30px;
}
.page-faq .faq-sec-num {
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--signal);
}
.page-faq .faq-sec-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(24px, 5.4vw, 38px);
  line-height: 1.15;
  color: var(--text);
}
.page-faq .faq-sec-head p {
  margin: 0;
  max-width: 62ch;
  color: var(--muted);
  line-height: 1.75;
}
.page-faq .faq-kicker {
  margin: 0;
}
.page-faq .faq-kicker .tag {
  display: inline-block;
}

/* 设备分区 */
.page-faq .faq-devices {
  display: grid;
  gap: 1px;
  background: var(--faq-line);
  border: 1px solid var(--faq-line);
}
.page-faq .faq-device {
  background: var(--faq-panel);
  padding: var(--faq-pad);
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.page-faq .faq-device h3 {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 22px;
  color: var(--text);
}
.page-faq .faq-device__key {
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--path);
  border: 1px solid var(--path-deep);
  padding: 3px 7px;
  line-height: 1;
}
.page-faq .faq-device__desc {
  margin: 0;
  font-size: 14px;
  color: var(--muted);
  line-height: 1.7;
}
.page-faq .faq-device ul {
  list-style: none;
  margin: 4px 0 0;
  padding: 12px 0 0;
  border-top: 1px solid var(--faq-line);
  display: grid;
  gap: 0;
}
.page-faq .faq-device li + li {
  border-top: 1px dashed rgba(30, 58, 95, .85);
}
.page-faq .faq-device li a {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 11px 0;
  font-size: 15px;
  line-height: 1.55;
  color: var(--text);
  text-decoration: none;
  transition: color .2s ease, padding-left .2s ease;
}
.page-faq .faq-device li a span {
  color: var(--path-deep);
  font-size: 13px;
  flex: 0 0 auto;
  transition: color .2s ease, transform .2s ease;
}
.page-faq .faq-device li a:hover,
.page-faq .faq-device li a:focus-visible {
  color: var(--path);
  padding-left: 4px;
}
.page-faq .faq-device li a:hover span,
.page-faq .faq-device li a:focus-visible span {
  color: var(--path);
  transform: translateX(3px);
}

/* 折叠条目 */
.page-faq .faq-list {
  border-top: 1px solid var(--faq-line);
}
.page-faq .faq-item {
  border-bottom: 1px solid var(--faq-line);
}
.page-faq .faq-item > summary {
  list-style: none;
  cursor: pointer;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 12px;
  align-items: start;
  padding: 18px 0;
  color: var(--text);
  font-size: 17px;
  line-height: 1.55;
  transition: color .2s ease;
}
.page-faq .faq-item > summary::-webkit-details-marker {
  display: none;
}
.page-faq .faq-item > summary:hover,
.page-faq .faq-item > summary:focus-visible {
  color: var(--path);
}
.page-faq .faq-item__num {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--muted);
  padding-top: 5px;
}
.page-faq .faq-item__q {
  min-width: 0;
}
.page-faq .faq-item__mark {
  width: 9px;
  height: 9px;
  margin-top: 7px;
  border-right: 1px solid var(--path);
  border-bottom: 1px solid var(--path);
  transform: rotate(45deg);
  transition: transform .24s ease, border-color .2s ease;
}
.page-faq .faq-item[open] > summary {
  color: var(--text);
}
.page-faq .faq-item[open] > summary .faq-item__mark {
  transform: rotate(225deg);
}
.page-faq .faq-item__a {
  padding: 0 0 24px;
  max-width: 68ch;
  color: var(--muted);
  line-height: 1.78;
  border-left: 2px solid var(--faq-line);
  padding-left: 16px;
  margin-left: 2px;
}
.page-faq .faq-item__a p {
  margin: 0;
}
.page-faq .faq-verdict {
  color: var(--text);
  font-weight: 500;
}

/* 步骤列表 */
.page-faq .faq-steps {
  list-style: none;
  counter-reset: faq-step;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.page-faq .faq-steps li {
  counter-increment: faq-step;
  display: grid;
  grid-template-columns: 36px 1fr;
  gap: 12px;
  align-items: start;
  font-size: 15px;
  line-height: 1.7;
}
.page-faq .faq-steps li::before {
  content: counter(faq-step, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--path);
  border-top: 1px solid var(--faq-line);
  padding-top: 7px;
}

/* 图注框 */
.page-faq .faq-figure {
  margin: 0 0 30px;
  padding: 14px;
  border: 1px solid var(--faq-line);
  background: var(--faq-panel);
}
.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: contain;
  background: var(--ink-900);
}
.page-faq .faq-figure figcaption {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--faq-line);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--muted);
}

/* 排查流程 */
.page-faq .faq-trouble {
  display: grid;
  gap: 26px;
}
.page-faq .faq-figure--trouble {
  margin-bottom: 0;
}
.page-faq .faq-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--faq-line);
  border: 1px solid var(--faq-line);
  counter-reset: none;
}
.page-faq .faq-flow__step {
  position: relative;
  background: var(--ink-900);
  padding: 22px var(--faq-pad) 22px 54px;
}
.page-faq .faq-flow__step::before {
  content: "";
  position: absolute;
  left: 26px;
  top: 26px;
  bottom: 26px;
  width: 1px;
  background: var(--faq-line);
}
.page-faq .faq-flow__step::after {
  content: "";
  position: absolute;
  left: 22px;
  top: 26px;
  width: 9px;
  height: 9px;
  border: 1px solid var(--path);
  background: var(--ink-900);
  transform: rotate(45deg);
}
.page-faq .faq-flow__idx {
  display: block;
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--signal);
  margin-bottom: 8px;
}
.page-faq .faq-flow__step h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 20px;
  color: var(--text);
}
.page-faq .faq-flow__step p {
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

/* 联系区 */
.page-faq .faq-contact {
  display: grid;
  gap: 24px;
  border: 1px solid var(--faq-line);
  background: var(--faq-panel);
  padding: var(--faq-pad);
}
.page-faq .faq-contact__main {
  display: grid;
  gap: 20px;
}
.page-faq .faq-contact .contact-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--faq-line);
  border: 1px solid var(--faq-line);
}
.page-faq .faq-contact .contact-item {
  background: var(--ink-900);
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 14px 16px;
}
.page-faq .faq-contact .contact-key {
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--muted);
}
.page-faq .faq-contact .contact-val {
  margin: 0;
  font-size: 16px;
  color: var(--text);
  word-break: break-word;
}
.page-faq .faq-contact .contact-hint {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
  padding-top: 16px;
  border-top: 1px dashed var(--faq-line);
}
.page-faq .faq-contact__side {
  display: grid;
  gap: 10px;
  align-content: start;
  padding-top: 18px;
  border-top: 1px solid var(--faq-line);
}
.page-faq .faq-contact__side .index-text {
  color: var(--signal);
  margin: 0 0 4px;
}
.page-faq .faq-contact__side .btn {
  text-align: center;
}

/* 出口条 */
.page-faq .faq-exits {
  border-top: 1px solid var(--faq-line);
  background: var(--ink-800);
}
.page-faq .faq-exits__inner {
  padding-top: 26px;
  padding-bottom: 32px;
  display: grid;
  gap: 14px;
}
.page-faq .faq-exits .index-text {
  color: var(--signal);
  margin: 0;
}
.page-faq .faq-exits ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.page-faq .faq-exits li a {
  display: inline-block;
  padding: 9px 16px;
  border: 1px solid var(--line-600);
  color: var(--text);
  text-decoration: none;
  font-size: 14px;
  transition: border-color .2s ease, color .2s ease, transform .2s ease, background-color .2s ease;
}
.page-faq .faq-exits li a:hover,
.page-faq .faq-exits li a:focus-visible {
  border-color: var(--path);
  color: var(--path);
  background: rgba(25, 224, 192, .06);
  transform: translateY(-2px);
}

/* 平板尺寸与横向排布 */
@media (min-width: 640px) {
  .page-faq .faq-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-faq .faq-contact .contact-item {
    grid-template-columns: 130px 1fr;
    align-items: baseline;
    gap: 14px;
  }
}

@media (min-width: 880px) {
  .page-faq .faq-devices {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-faq .faq-section {
    padding: 68px 0 76px;
  }
  .page-faq .faq-trouble {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    align-items: start;
    gap: 34px;
  }
  .page-faq .faq-figure--trouble {
    margin-bottom: 0;
    position: sticky;
    top: calc(var(--bar-h-min) + 74px);
  }
  .page-faq .faq-contact {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, .85fr);
    gap: 30px;
    align-items: start;
  }
  .page-faq .faq-contact__side {
    border-top: 0;
    border-left: 1px solid var(--faq-line);
    padding-top: 0;
    padding-left: 26px;
  }
  .page-faq .faq-item > summary {
    grid-template-columns: 58px 1fr auto;
    gap: 18px;
    font-size: 18px;
    padding: 22px 0;
  }
  .page-faq .faq-item__a {
    padding-left: 24px;
    margin-left: 58px;
  }
  .page-faq .faq-exits__inner {
    grid-template-columns: 200px 1fr;
    align-items: center;
    gap: 20px;
  }
}

@media (min-width: 1100px) {
  .page-faq .faq-item__a {
    max-width: 74ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__mark,
  .page-faq .faq-device li a,
  .page-faq .faq-device li a span,
  .page-faq .faq-exits li a {
    transition: none;
  }
}

@media print {
  .page-faq .faq-console,
  .page-faq .faq-exits,
  .page-faq .faq-crumb {
    display: none;
  }
  .page-faq .faq-section {
    padding: 18px 0;
    border-bottom: 1px solid #999;
  }
  .page-faq .faq-item > summary {
    color: #111;
  }
  .page-faq .faq-masthead::after {
    content: "帮助中心 · v2.4";
    display: block;
    font-family: var(--font-mono);
    font-size: 12px;
    margin-top: 12px;
    color: #333;
  }
}