.page-faq {
  --faq-rail-w: 210px;
  --faq-gap: 56px;
  --faq-line: rgba(23, 195, 178, .3);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-open {
  position: relative;
  overflow: hidden;
  padding: 34px 0 48px;
}

.page-faq .faq-open::before {
  content: "";
  position: absolute;
  top: -120%;
  right: -14%;
  width: 68%;
  height: 300%;
  background: radial-gradient(closest-side, rgba(23, 195, 178, .16), transparent 72%);
  transform: rotate(20deg);
  pointer-events: none;
}

.page-faq .faq-open::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: min(360px, 62%);
  height: 3px;
  background: linear-gradient(90deg, var(--teal), var(--violet) 55%, var(--pulse));
  opacity: .8;
}

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

.page-faq .faq-open h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 7.2vw, 60px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  margin: 16px 0 18px;
  max-width: 16em;
  color: var(--text-1);
}

.page-faq .faq-open .lede {
  max-width: 34em;
  color: var(--text-2);
}

.page-faq .faq-open-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-open-facts span {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--slate);
}

.page-faq .faq-open-facts .num {
  font-family: var(--font-mono);
  font-size: 22px;
  letter-spacing: 0;
  color: var(--teal-soft);
}

.page-faq .faq-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

/* ---------- 双栏壳层 ---------- */
.page-faq .faq-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  padding-top: 26px;
  padding-bottom: 76px;
}

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

/* ---------- 左侧步进器 ---------- */
.page-faq .faq-rail {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 8px;
  scrollbar-width: thin;
}

.page-faq .faq-rail-title {
  display: none;
}

.page-faq .faq-rail .index-link {
  display: inline-flex;
  align-items: baseline;
  gap: 9px;
  flex: none;
  padding: 9px 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(18, 41, 63, .72);
  color: var(--text-2);
  font-size: 13.5px;
  text-decoration: none;
  white-space: nowrap;
  transition: color .22s var(--ease), border-color .22s var(--ease), background .22s var(--ease), transform .22s var(--ease);
}

.page-faq .faq-rail .index-no {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--violet);
}

.page-faq .faq-rail .index-link:hover {
  color: var(--text-1);
  border-color: var(--teal-line);
  transform: translateY(-2px);
}

.page-faq .faq-rail .index-link[aria-current="true"] {
  color: var(--ink);
  background: var(--teal);
  border-color: var(--teal);
}

.page-faq .faq-rail .index-link[aria-current="true"] .index-no {
  color: var(--ink);
}

/* ---------- 章节 ---------- */
.page-faq .faq-section {
  padding: 40px 0 12px;
  border-top: 1px solid var(--line);
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-faq .faq-section:first-child {
  border-top: 0;
  padding-top: 6px;
}

.page-faq .faq-head {
  max-width: 46em;
  margin-bottom: 26px;
}

.page-faq .faq-head h2 {
  margin: 10px 0 14px;
  letter-spacing: -0.02em;
}

.page-faq .faq-head .lede {
  color: var(--text-2);
  max-width: 36em;
}

.page-faq .faq-sub {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--text-1);
  margin: 38px 0 16px;
  padding-left: 14px;
  border-left: 3px solid var(--amber);
}

/* ---------- 图片 ---------- */
.page-faq .faq-figure {
  margin: 0 0 32px;
}

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

/* ---------- 编号步骤 ---------- */
.page-faq .faq-steps {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-step {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  column-gap: 18px;
  position: relative;
  padding-bottom: 30px;
}

.page-faq .faq-step::before {
  content: "";
  position: absolute;
  left: 22px;
  top: 48px;
  bottom: 4px;
  width: 2px;
  background: linear-gradient(180deg, var(--faq-line), rgba(23, 195, 178, 0));
}

.page-faq .faq-step:last-child {
  padding-bottom: 6px;
}

.page-faq .faq-step:last-child::before {
  display: none;
}

.page-faq .step-no {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  border: 2px solid var(--teal-line);
  background: var(--ink-2);
  color: var(--teal-soft);
  font-family: var(--font-mono);
  font-size: 15px;
}

.page-faq .step-body h3 {
  font-size: 17px;
  font-weight: 700;
  margin: 10px 0 8px;
  color: var(--text-1);
}

.page-faq .step-body p {
  margin: 0;
  max-width: 34em;
  color: var(--text-2);
  line-height: 1.85;
}

/* ---------- 术语表 ---------- */
.page-faq .faq-tablewrap {
  margin-bottom: 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(18, 41, 63, .5);
}

.page-faq .faq-terms {
  min-width: 620px;
  width: 100%;
}

.page-faq .faq-terms caption {
  text-align: left;
  padding: 16px 18px 10px;
  color: var(--slate);
}

.page-faq .faq-terms th {
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--slate);
  background: rgba(11, 26, 43, .86);
}

.page-faq .faq-terms td:first-child {
  color: var(--text-1);
  font-weight: 600;
}

.page-faq .faq-terms td.num {
  color: var(--teal-soft);
}

.page-faq .faq-terms tbody tr:hover td {
  background: rgba(23, 195, 178, .07);
}

/* ---------- 检索提示 ---------- */
.page-faq .faq-tips {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-faq .faq-tip {
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-top: 3px solid var(--violet);
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  background: rgba(18, 41, 63, .62);
}

.page-faq .faq-tip .index {
  color: var(--violet);
  margin: 0 0 8px;
}

.page-faq .faq-tip p:last-child {
  margin: 0;
  color: var(--text-2);
  line-height: 1.8;
}

/* ---------- 角色问答 ---------- */
.page-faq .faq-role {
  margin-bottom: 30px;
}

.page-faq .faq-role-label {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 6px;
  color: var(--amber);
  letter-spacing: .16em;
}

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

.page-faq .qa summary {
  list-style: none;
  cursor: pointer;
  position: relative;
  padding: 17px 46px 17px 0;
  font-size: 16.5px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--text-1);
  transition: color .2s var(--ease);
}

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

.page-faq .qa summary::after {
  content: "";
  position: absolute;
  right: 12px;
  top: 50%;
  width: 10px;
  height: 10px;
  margin-top: -7px;
  border-right: 2px solid var(--teal);
  border-bottom: 2px solid var(--teal);
  transform: rotate(45deg);
  transition: transform .25s var(--ease), margin-top .25s var(--ease);
}

.page-faq .qa[open] summary {
  color: var(--teal-soft);
}

.page-faq .qa[open] summary::after {
  transform: rotate(-135deg);
  margin-top: -2px;
}

.page-faq .qa summary:hover {
  color: var(--teal-soft);
}

.page-faq .qa summary:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 3px;
  border-radius: 6px;
}

.page-faq .qa-body {
  padding: 0 34px 20px 0;
}

.page-faq .qa-body p {
  margin: 0;
  max-width: 34em;
  color: var(--text-2);
  line-height: 1.85;
}

/* ---------- 排障步骤 ---------- */
.page-faq .faq-seq {
  list-style: none;
  counter-reset: seq;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .faq-seq li {
  position: relative;
  counter-increment: seq;
  padding: 16px 20px 16px 60px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--teal);
  border-radius: var(--radius-sm);
  background: rgba(18, 41, 63, .62);
  color: var(--text-2);
  line-height: 1.8;
}

.page-faq .faq-seq li::before {
  content: counter(seq, decimal-leading-zero);
  position: absolute;
  left: 20px;
  top: 17px;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: .02em;
  color: var(--amber);
}

/* ---------- 勾选清单 ---------- */
.page-faq .faq-check {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-check label {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 13px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(18, 41, 63, .62);
  color: var(--text-2);
  line-height: 1.7;
  cursor: pointer;
  transition: border-color .2s var(--ease), background .2s var(--ease);
}

.page-faq .faq-check label:hover {
  border-color: var(--teal-line);
}

.page-faq .faq-check input {
  appearance: none;
  -webkit-appearance: none;
  flex: none;
  position: relative;
  width: 20px;
  height: 20px;
  margin: 2px 0 0;
  border: 2px solid var(--slate);
  border-radius: 6px;
  background: transparent;
  cursor: pointer;
  transition: border-color .2s var(--ease), background .2s var(--ease);
}

.page-faq .faq-check input:checked {
  border-color: var(--teal);
  background: rgba(23, 195, 178, .18);
}

.page-faq .faq-check input:checked::after {
  content: "";
  position: absolute;
  left: 4px;
  top: 1px;
  width: 7px;
  height: 11px;
  border-right: 2px solid var(--teal-soft);
  border-bottom: 2px solid var(--teal-soft);
  transform: rotate(40deg);
}

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

.page-faq .faq-after {
  margin: 22px 0 0;
  padding: 16px 18px;
  border-left: 3px solid var(--pulse);
  background: rgba(255, 90, 54, .08);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-2);
  line-height: 1.8;
  max-width: 46em;
}

/* ---------- 导出注意 ---------- */
.page-faq .faq-note {
  margin-top: 26px;
  padding: 22px 22px 6px;
  border: 1px dashed var(--teal-line);
  border-radius: var(--radius);
  background: rgba(23, 195, 178, .06);
}

.page-faq .faq-note .index {
  color: var(--teal-soft);
  margin: 0 0 12px;
}

.page-faq .faq-note ul {
  margin: 0;
  padding: 0 0 0 18px;
  color: var(--text-2);
}

.page-faq .faq-note li {
  margin-bottom: 12px;
  line-height: 1.8;
  max-width: 36em;
}

/* ---------- 人工协助 ---------- */
.page-faq .faq-callout {
  padding: 28px 24px;
  background: linear-gradient(140deg, rgba(23, 195, 178, .17), rgba(122, 92, 255, .13) 58%, rgba(255, 90, 54, .15));
  clip-path: polygon(0 0, calc(100% - 24px) 0, 100% 24px, 100% 100%, 24px 100%, 0 calc(100% - 24px));
}

.page-faq .faq-callout-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
}

.page-faq .faq-callout .index {
  color: var(--teal-soft);
  margin: 0 0 8px;
}

.page-faq .faq-contact-line {
  margin: 0 0 8px;
  font-size: 19px;
  font-weight: 700;
  color: var(--text-1);
  word-break: break-word;
}

.page-faq .faq-contact-line a {
  color: var(--text-1);
  text-decoration: none;
  border-bottom: 2px solid var(--teal);
  padding-bottom: 2px;
}

.page-faq .faq-contact-line a:hover {
  color: var(--teal-soft);
  border-bottom-color: var(--teal-soft);
}

.page-faq .faq-contact-line a:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 3px;
  border-radius: 4px;
}

.page-faq .faq-callout .muted {
  margin: 0;
  line-height: 1.75;
  max-width: 32em;
}

.page-faq .faq-attach {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .faq-attach li {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  color: var(--text-2);
  line-height: 1.8;
}

.page-faq .faq-attach .index {
  color: var(--violet);
  letter-spacing: .12em;
}

.page-faq .faq-next {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
}

/* ---------- 焦点可见 ---------- */
.page-faq a:focus-visible,
.page-faq .index-link:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 3px;
  border-radius: 6px;
}

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

  .page-faq .faq-callout-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px;
  }

  .page-faq .faq-callout {
    padding: 34px 32px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 960px) {
  .page-faq .faq-open {
    padding: 56px 0 64px;
  }

  .page-faq .faq-shell {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    column-gap: var(--faq-gap);
    padding-top: 44px;
  }

  .page-faq .faq-rail {
    display: block;
    position: sticky;
    top: calc(var(--header-h) + 32px);
    align-self: start;
    max-height: calc(100vh - var(--header-h) - 60px);
    overflow: auto;
    padding-bottom: 0;
  }

  .page-faq .faq-rail-title {
    display: block;
    margin: 0 0 14px;
    padding-left: 12px;
    color: var(--slate);
  }

  .page-faq .faq-rail .index-link {
    display: flex;
    width: 100%;
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0 10px 10px 0;
    background: transparent;
    padding: 10px 12px;
    white-space: normal;
  }

  .page-faq .faq-rail .index-link:hover {
    transform: none;
    background: rgba(23, 195, 178, .08);
  }

  .page-faq .faq-rail .index-link[aria-current="true"] {
    background: rgba(23, 195, 178, .14);
    border-left-color: var(--teal);
    color: var(--text-1);
  }

  .page-faq .faq-rail .index-link[aria-current="true"] .index-no {
    color: var(--teal);
  }

  .page-faq .faq-section {
    padding: 52px 0 16px;
  }

  .page-faq .faq-step {
    grid-template-columns: 56px minmax(0, 1fr);
    column-gap: 24px;
    padding-bottom: 34px;
  }

  .page-faq .faq-step::before {
    left: 27px;
    top: 58px;
  }

  .page-faq .step-no {
    width: 56px;
    height: 56px;
    font-size: 16px;
  }

  .page-faq .faq-seq li {
    padding: 18px 24px 18px 68px;
  }

  .page-faq .faq-seq li::before {
    left: 24px;
    top: 19px;
  }

  .page-faq .qa summary {
    padding: 19px 52px 19px 0;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-head h2 {
    font-size: 40px;
  }
}

/* ---------- 动效克减 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
  }
}