/* ===== 问题排查页 page-faq ===== */
.page-faq {
  background: var(--nfs-indigo);
  color: var(--nfs-white);
}

.page-faq :focus-visible {
  outline: 2px solid var(--nfs-cyan);
  outline-offset: 3px;
}

/* 面包屑 */
.page-faq .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 18px 0 0;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--nfs-mist);
}
.page-faq .breadcrumb a {
  color: var(--nfs-mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}
.page-faq .breadcrumb a:hover {
  color: var(--nfs-amber);
  border-bottom-color: var(--nfs-amber);
}
.page-faq .breadcrumb .crumb-sep {
  color: rgba(140, 151, 168, .55);
}

/* 首屏 */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}
.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(53, 224, 200, .06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(53, 224, 200, .06) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
  z-index: 1;
}
.page-faq .faq-hero-media {
  position: absolute;
  inset: 0;
}
.page-faq .faq-hero-media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 30%;
  opacity: .22;
}
.page-faq .faq-hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(5, 8, 15, .88) 0%, rgba(14, 21, 38, .9) 62%, var(--nfs-indigo) 100%);
}
.page-faq .faq-hero-inner {
  position: relative;
  z-index: 2;
  padding: 40px 0 36px;
}
.page-faq h1 {
  margin: 14px 0 0;
  max-width: 15em;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(30px, 7.2vw, 72px);
  line-height: 1.06;
  letter-spacing: .04em;
  color: var(--nfs-white);
}
.page-faq .faq-lede {
  max-width: 62ch;
  margin: 20px 0 0;
  font-size: 16px;
  line-height: 1.8;
  color: #C7D0DE;
}
.page-faq .faq-hero-meta {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin: 26px 0 0;
  padding: 16px 0 0;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  color: var(--nfs-mist);
}
.page-faq .faq-hero-meta li {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: baseline;
}
.page-faq .faq-hero-meta strong {
  color: var(--nfs-amber);
  font-weight: 500;
}

/* 区块节奏 */
.page-faq .faq-block {
  padding: 54px 0;
  border-top: 1px solid var(--line);
}
.page-faq .faq-block:first-of-type {
  border-top: 0;
}

/* 分段切换 */
.page-faq .faq-tabs {
  margin-top: 32px;
}
.page-faq .tablist {
  display: flex;
  gap: 0;
  overflow-x: auto;
  border-bottom: 1px solid var(--line-strong);
  scrollbar-width: thin;
  scrollbar-color: var(--nfs-slate) transparent;
}
.page-faq .tab {
  appearance: none;
  flex: 0 0 auto;
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 14px 16px;
  background: transparent;
  border: 0;
  border-bottom: 2px solid transparent;
  color: var(--nfs-mist);
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .04em;
  white-space: nowrap;
  cursor: pointer;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}
.page-faq .tab .tab-no {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: .08em;
  color: rgba(140, 151, 168, .75);
  transition: color .18s var(--ease);
}
.page-faq .tab:hover {
  color: var(--nfs-white);
}
.page-faq .tab[aria-selected="true"] {
  color: var(--nfs-white);
  border-bottom-color: var(--nfs-amber);
}
.page-faq .tab[aria-selected="true"] .tab-no {
  color: var(--nfs-amber);
}
.page-faq .tabpanel {
  padding-top: 26px;
}
.page-faq .tabpanel:focus-visible {
  outline: 2px solid var(--nfs-cyan);
  outline-offset: 8px;
}

/* 问答条目 */
.page-faq .qa {
  border: 1px solid var(--line);
  border-left: 3px solid var(--line-strong);
  background: rgba(27, 36, 56, .34);
  transition: border-color .2s var(--ease), background-color .2s var(--ease);
}
.page-faq .qa + .qa {
  margin-top: 10px;
}
.page-faq .qa[open] {
  border-left-color: var(--nfs-cyan);
  background: rgba(27, 36, 56, .62);
}
.page-faq .qa-q {
  list-style: none;
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 16px 18px;
  cursor: pointer;
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.55;
  letter-spacing: .01em;
  color: var(--nfs-white);
  transition: color .18s var(--ease);
}
.page-faq .qa-q::-webkit-details-marker {
  display: none;
}
.page-faq .qa-q:hover {
  color: var(--nfs-amber-soft);
}
.page-faq .qa-idx {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: .06em;
  color: var(--nfs-amber);
}
.page-faq .qa-caret {
  flex: 0 0 auto;
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--nfs-mist);
  transition: transform .2s var(--ease), color .2s var(--ease);
}
.page-faq .qa[open] .qa-caret {
  color: var(--nfs-cyan);
  transform: rotate(45deg);
}
.page-faq .qa-body {
  padding: 0 18px 18px;
}
.page-faq .qa-body p {
  max-width: 74ch;
  margin: 0 0 10px;
  font-size: 15.5px;
  line-height: 1.8;
  color: #C4CDDB;
}
.page-faq .qa-body .qa-conclusion {
  margin-bottom: 12px;
  padding-left: 12px;
  border-left: 2px solid var(--nfs-amber);
  color: var(--nfs-white);
  font-weight: 500;
}
.page-faq .qa-anchor {
  display: inline-block;
  margin-top: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--nfs-mist);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
  transition: color .18s var(--ease), border-color .18s var(--ease);
}
.page-faq .qa-anchor:hover {
  color: var(--nfs-cyan);
  border-bottom-color: var(--nfs-cyan);
}

/* 排查步骤 */
.page-faq .faq-steps-grid {
  display: grid;
  gap: 32px;
}
.page-faq .step-list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}
.page-faq .step {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 12px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}
.page-faq .step-num {
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1.6;
  letter-spacing: .04em;
  color: var(--nfs-amber);
}
.page-faq .step h3 {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--nfs-white);
}
.page-faq .step p {
  max-width: 60ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: #C4CDDB;
}
.page-faq .faq-figure {
  margin: 22px 0 0;
  border: 1px solid var(--line);
  background: var(--nfs-charcoal);
}
.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  opacity: .78;
}
.page-faq .faq-figure figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--nfs-mist);
}

/* 口径对照表 */
.page-faq .faq-table-wrap {
  margin-top: 24px;
  overflow-x: auto;
  border-top: 1px solid var(--line-strong);
  scrollbar-width: thin;
  scrollbar-color: var(--nfs-slate) transparent;
}
.page-faq .faq-table {
  width: 100%;
  min-width: 660px;
  border-collapse: collapse;
  font-size: 14.5px;
}
.page-faq .faq-table th,
.page-faq .faq-table td {
  padding: 13px 14px;
  text-align: left;
  vertical-align: top;
  line-height: 1.7;
  border-bottom: 1px solid var(--line);
}
.page-faq .faq-table thead th {
  background: rgba(27, 36, 56, .55);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: .08em;
  color: var(--nfs-mist);
}
.page-faq .faq-table tbody th {
  font-family: var(--font-head);
  font-size: 15px;
  font-weight: 700;
  color: var(--nfs-white);
  white-space: nowrap;
}
.page-faq .faq-table tbody tr:nth-child(even) {
  background: rgba(27, 36, 56, .26);
}
.page-faq .faq-table td {
  color: #C4CDDB;
}
.page-faq .faq-table .col-cadence {
  font-family: var(--font-mono);
  color: var(--nfs-cyan);
  white-space: nowrap;
}
.page-faq .faq-note {
  max-width: 78ch;
  margin: 18px 0 0;
  padding-left: 14px;
  border-left: 1px solid var(--line-strong);
  font-size: 14px;
  line-height: 1.8;
  color: var(--nfs-mist);
}

/* 环境检查 */
.page-faq .env-grid {
  display: grid;
  gap: 1px;
  margin-top: 24px;
  border: 1px solid var(--line);
  background: var(--line);
}
.page-faq .env-item {
  padding: 20px 18px;
  background: var(--nfs-indigo);
}
.page-faq .env-item h3 {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--nfs-amber-soft);
}
.page-faq .env-item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: #C4CDDB;
}

/* 联系路径 */
.page-faq .faq-contact {
  display: grid;
  gap: 24px;
  margin-top: 26px;
  padding: 24px 20px;
  border: 1px solid var(--line);
  border-top: 2px solid var(--nfs-amber);
  background: linear-gradient(135deg, rgba(27, 36, 56, .74), rgba(14, 21, 38, .5));
}
.page-faq .faq-contact-main h3 {
  margin: 0 0 16px;
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: .03em;
  color: var(--nfs-white);
}
.page-faq .faq-prep {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
}
.page-faq .faq-prep li {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 10px;
  align-items: baseline;
  padding: 11px 0;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
  line-height: 1.7;
  color: #C4CDDB;
}
.page-faq .faq-prep-num {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--nfs-cyan);
}
.page-faq .faq-contact-tip {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--nfs-mist);
}
.page-faq .faq-contact-side {
  padding-top: 20px;
  border-top: 1px solid var(--line);
}
.page-faq .faq-contact-line {
  display: grid;
  gap: 4px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}
.page-faq .faq-contact-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--nfs-mist);
}
.page-faq .faq-contact-value {
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.6;
  color: var(--nfs-amber-soft);
  word-break: break-word;
}
.page-faq .faq-contact-note {
  margin: 16px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--nfs-mist);
}
.page-faq .faq-contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 18px 0 0;
}

@media (min-width: 768px) {
  .page-faq .faq-hero-inner {
    padding: 62px 0 56px;
  }
  .page-faq .faq-block {
    padding: 68px 0;
  }
  .page-faq .faq-tabs {
    margin-top: 38px;
  }
  .page-faq .tab {
    padding: 16px 22px;
    font-size: 15px;
  }
  .page-faq .tabpanel {
    padding-top: 32px;
  }
  .page-faq .qa-q {
    padding: 18px 22px;
    font-size: 17px;
  }
  .page-faq .qa-body {
    padding: 0 22px 22px 22px;
  }
  .page-faq .env-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-faq .env-item {
    padding: 24px 20px;
  }
  .page-faq .faq-contact {
    grid-template-columns: 1.15fr .85fr;
    gap: 32px;
    padding: 30px 28px;
  }
  .page-faq .faq-contact-side {
    padding-top: 0;
    padding-left: 28px;
    border-top: 0;
    border-left: 1px solid var(--line);
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-steps-grid {
    grid-template-columns: 1.45fr 1fr;
    gap: 48px;
    align-items: start;
  }
  .page-faq .faq-figure {
    margin-top: 30px;
  }
  .page-faq .faq-figure img {
    aspect-ratio: 4 / 5;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .tab,
  .page-faq .qa,
  .page-faq .qa-q,
  .page-faq .qa-caret,
  .page-faq .qa-anchor,
  .page-faq .breadcrumb a {
    transition: none;
  }
  .page-faq .qa[open] .qa-caret {
    transform: none;
  }
}