/* ===== 排查知识库 /knowledge/ ===== */
.page-faq {
  --faq-line: #26356B;
  --faq-line-soft: rgba(38, 53, 107, .58);
  --faq-ink-body: #C8D0E8;
  background: var(--deep);
  color: var(--starlight);
  padding-block: clamp(1.25rem, 3vw, 2rem) clamp(3rem, 8vw, 6rem);
  overflow-x: hidden;
}

/* --- 面包屑 --- */
.page-faq .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
  font-size: var(--fs-xs);
  letter-spacing: .08em;
  color: var(--obs);
  margin-bottom: clamp(1.5rem, 4vw, 2.75rem);
}
.page-faq .breadcrumb a {
  color: var(--obs);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}
.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus-visible {
  color: var(--pulse);
  border-bottom-color: var(--pulse);
}
.page-faq .breadcrumb__sep { color: var(--orbit); }

/* --- 首屏 --- */
.page-faq .faq-hero {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
  align-items: end;
  margin-bottom: clamp(3rem, 8vw, 6rem);
}
.page-faq .faq-hero__index {
  font-size: var(--fs-xs);
  letter-spacing: .26em;
  text-transform: uppercase;
  color: var(--violet);
  margin: 0 0 1rem;
}
.page-faq .faq-hero h1 {
  font-size: clamp(1.95rem, 6.4vw, 3.55rem);
  line-height: 1.1;
  letter-spacing: .04em;
  font-weight: 900;
  margin: 0 0 1.15rem;
  max-width: 16em;
}
.page-faq .faq-hero__lead {
  font-size: var(--fs-sm);
  line-height: 1.85;
  color: var(--faq-ink-body);
  max-width: 34em;
  margin: 0 0 1.6rem;
}
.page-faq .faq-hero__legend {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.5rem;
  padding-top: 1.1rem;
  border-top: 1px solid var(--faq-line-soft);
}
.page-faq .faq-hero__figure {
  margin: 0;
  position: relative;
  border: 1px solid var(--orbit);
  aspect-ratio: 4 / 3;
  overflow: hidden;
}
.page-faq .faq-hero__figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(160deg, rgba(139, 92, 246, .18), transparent 58%);
  pointer-events: none;
}
.page-faq .faq-hero__figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* --- 三段自检 --- */
.page-faq .faq-check { margin-bottom: clamp(3rem, 8vw, 5.5rem); }
.page-faq .section-head { margin-bottom: clamp(1.5rem, 4vw, 2.5rem); }
.page-faq .section-head__index { color: var(--violet); }
.page-faq .section-head__lead { color: var(--obs); }

.page-faq .check-track {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.1rem;
}
.page-faq .check-card {
  position: relative;
  background: var(--nebula);
  border: 1px solid var(--faq-line-soft);
  border-top: 2px solid var(--violet);
  padding: 1.4rem 1.25rem 1.5rem;
  transition: border-color .2s var(--ease), background .2s var(--ease);
}
.page-faq .check-card:hover { border-color: var(--pulse); }
.page-faq .check-card__num {
  margin: 0 0 .75rem;
  font-size: var(--fs-xs);
  letter-spacing: .2em;
  color: var(--pulse);
}
.page-faq .check-card__title {
  margin: 0 0 .6rem;
  font-size: var(--fs-md);
  font-weight: 800;
  letter-spacing: .03em;
}
.page-faq .check-card__text {
  margin: 0 0 .9rem;
  font-size: var(--fs-sm);
  line-height: 1.8;
  color: var(--faq-ink-body);
}
.page-faq .check-card__watch {
  margin: 0;
  padding-top: .75rem;
  border-top: 1px solid var(--faq-line-soft);
  font-size: var(--fs-xs);
  line-height: 1.7;
  color: var(--obs);
}

/* --- 交互诊断 --- */
.page-faq .faq-diag { margin-bottom: clamp(3rem, 8vw, 5.5rem); }
.page-faq .diag {
  display: grid;
  gap: 1.5rem;
  align-items: start;
}
.page-faq .diag__control {
  background: var(--nebula);
  border: 1px solid var(--faq-line-soft);
  padding: 1.4rem 1.25rem;
}
.page-faq .diag__group {
  border: 0;
  margin: 0 0 1.4rem;
  padding: 0;
}
.page-faq .diag__group:last-of-type { margin-bottom: 1rem; }
.page-faq .diag__legend {
  display: flex;
  align-items: center;
  gap: .55rem;
  padding: 0;
  margin-bottom: .8rem;
  font-size: var(--fs-xs);
  letter-spacing: .18em;
  color: var(--obs);
}
.page-faq .diag__legend .mono { color: var(--pulse); letter-spacing: 0; }
.page-faq .diag__options {
  display: flex;
  flex-wrap: wrap;
  gap: .45rem;
}
.page-faq .diag__radio {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}
.page-faq .diag__opt {
  display: inline-flex;
  align-items: center;
  min-height: 2.4rem;
  padding: .45rem .85rem;
  border: 1px solid var(--orbit);
  color: var(--starlight);
  font-size: var(--fs-xs);
  letter-spacing: .04em;
  cursor: pointer;
  user-select: none;
  transition: background .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease);
}
.page-faq .diag__opt:hover { border-color: var(--pulse); color: var(--pulse); }
.page-faq .diag__radio:focus-visible + .diag__opt {
  outline: 2px solid var(--pulse);
  outline-offset: 2px;
}
.page-faq .diag__radio:checked + .diag__opt {
  background: var(--paper);
  color: var(--ink);
  border-color: var(--pulse);
  box-shadow: inset 0 0 0 1px var(--pulse);
}
.page-faq .diag__radio:checked + .diag__opt:hover { color: var(--ink); }

.page-faq .diag__scales {
  list-style: none;
  margin: 0;
  padding: .9rem 0 0;
  border-top: 1px solid var(--faq-line-soft);
}
.page-faq .diag__scales li {
  display: flex;
  gap: .6rem;
  font-size: var(--fs-xs);
  line-height: 1.75;
  color: var(--obs);
  margin-bottom: .35rem;
}
.page-faq .diag__scales .mono { color: var(--violet); }

.page-faq .diag__output {
  display: grid;
  gap: 1rem;
  min-width: 0;
}
.page-faq .ver-block {
  border: 1px dashed var(--faq-line);
  border-left: 3px solid var(--violet);
  padding: 1.1rem 1.15rem;
  background: rgba(17, 27, 62, .55);
}
.page-faq .ver-block__label {
  margin: 0 0 .5rem;
  font-size: var(--fs-xs);
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--violet);
}
.page-faq .ver-block__value {
  margin: 0 0 .55rem;
  font-size: var(--fs-sm);
  font-weight: 700;
  line-height: 1.6;
  color: var(--starlight);
}
.page-faq .ver-block__note {
  margin: 0 0 .8rem;
  font-size: var(--fs-xs);
  line-height: 1.75;
  color: var(--obs);
}
.page-faq .ver-block__link {
  display: inline-block;
  font-size: var(--fs-xs);
  color: var(--pulse);
  text-decoration: none;
  border-bottom: 1px solid var(--faq-line);
  padding-bottom: 2px;
  transition: border-color .18s var(--ease), color .18s var(--ease);
}
.page-faq .ver-block__link:hover { border-bottom-color: var(--pulse); }

.page-faq .diag__env {
  display: none;
  flex-wrap: wrap;
  gap: .4rem;
}
.page-faq .diag__env-chip {
  display: none;
  align-items: center;
  padding: .28rem .62rem;
  border: 1px solid var(--orbit);
  font-size: var(--fs-xs);
  color: var(--obs);
}
.page-faq .diag:has(input[name="faq-device"]:checked) .diag__env { display: flex; }
.page-faq .diag:has(input[name="faq-os"]:checked) .diag__env,
.page-faq .diag:has(input[name="faq-browser"]:checked) .diag__env { display: flex; }
.page-faq .diag:has(#faq-os-win:checked) .diag__env-chip[data-env="win"],
.page-faq .diag:has(#faq-os-mac:checked) .diag__env-chip[data-env="mac"],
.page-faq .diag:has(#faq-os-android:checked) .diag__env-chip[data-env="android"],
.page-faq .diag:has(#faq-os-ios:checked) .diag__env-chip[data-env="ios"],
.page-faq .diag:has(#faq-br-chrome:checked) .diag__env-chip[data-env="chrome"],
.page-faq .diag:has(#faq-br-edge:checked) .diag__env-chip[data-env="edge"],
.page-faq .diag:has(#faq-br-safari:checked) .diag__env-chip[data-env="safari"],
.page-faq .diag:has(#faq-br-firefox:checked) .diag__env-chip[data-env="firefox"],
.page-faq .diag:has(#faq-br-opera:checked) .diag__env-chip[data-env="opera"],
.page-faq .diag:has(#faq-br-quark:checked) .diag__env-chip[data-env="quark"] {
  display: inline-flex;
}

.page-faq .diag__empty {
  margin: 0;
  padding: 1.6rem 1.25rem;
  border: 1px dashed var(--faq-line);
  font-size: var(--fs-sm);
  line-height: 1.8;
  color: var(--obs);
}
.page-faq .diag:has(input[name="faq-device"]:checked) .diag__empty { display: none; }

.page-faq .diag-result {
  display: none;
  background: var(--nebula);
  border: 1px solid var(--faq-line-soft);
  border-left: 3px solid var(--pulse);
  padding: 1.35rem 1.2rem 1.1rem;
  animation: faq-result-in .26s var(--ease) both;
}
.page-faq .diag:has(#faq-dev-mobile:checked) .diag-result[data-device="mobile"],
.page-faq .diag:has(#faq-dev-pc:checked) .diag-result[data-device="pc"],
.page-faq .diag:has(#faq-dev-tv:checked) .diag-result[data-device="tv"] {
  display: block;
}
@keyframes faq-result-in {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: none; }
}
.page-faq .diag-result__head { margin-bottom: 1rem; }
.page-faq .diag-result__label {
  margin: 0 0 .4rem;
  font-size: var(--fs-xs);
  letter-spacing: .2em;
  color: var(--pulse);
}
.page-faq .diag-result__title {
  margin: 0;
  font-size: var(--fs-md);
  font-weight: 800;
  line-height: 1.5;
  color: var(--starlight);
}
.page-faq .diag-result__steps {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-faq .diag-result__steps li {
  border-top: 1px solid var(--faq-line-soft);
  padding: .85rem 0;
}
.page-faq .diag-result__step {
  display: grid;
  grid-template-columns: 1.05rem 2rem 1fr;
  gap: .55rem;
  align-items: start;
  cursor: pointer;
}
.page-faq .diag__check {
  width: 1.05rem;
  height: 1.05rem;
  margin: .22rem 0 0;
  accent-color: var(--pulse);
}
.page-faq .diag-result__num {
  font-size: var(--fs-xs);
  line-height: 1.75;
  color: var(--violet);
}
.page-faq .diag-result__text {
  font-size: var(--fs-sm);
  line-height: 1.8;
  color: var(--faq-ink-body);
  transition: color .18s var(--ease);
}
.page-faq .diag-result__step:has(.diag__check:checked) .diag-result__text {
  color: var(--obs);
  text-decoration: line-through;
}

/* --- 桌面端登录状况 --- */
.page-faq .faq-pc { margin-bottom: clamp(3rem, 8vw, 5.5rem); }
.page-faq .pc-grid {
  display: grid;
  gap: 1.1rem;
}
.page-faq .pc-card {
  background: var(--paper);
  color: var(--ink);
  border-left: 3px solid var(--orbit);
  padding: 1.4rem 1.25rem 1.5rem;
  transition: border-color .2s var(--ease);
}
.page-faq .pc-card:hover { border-left-color: var(--orange); }
.page-faq .pc-card .tag { color: var(--ink); }
.page-faq .pc-card .tag--violet { background: rgba(139, 92, 246, .22); }
.page-faq .pc-card .tag--pulse { background: rgba(53, 224, 208, .28); }
.page-faq .pc-card .tag--orange { background: rgba(255, 122, 47, .24); }
.page-faq .pc-card__title {
  margin: .8rem 0 .75rem;
  font-size: var(--fs-md);
  font-weight: 800;
  line-height: 1.5;
  letter-spacing: .02em;
}
.page-faq .pc-card__steps {
  margin: 0;
  padding-left: 1.2rem;
  list-style: decimal;
}
.page-faq .pc-card__steps li {
  font-size: var(--fs-sm);
  line-height: 1.8;
  color: var(--ink-soft);
  margin-bottom: .5rem;
}
.page-faq .pc-card__steps li::marker {
  font-family: var(--font-mono);
  color: var(--violet);
  font-size: var(--fs-xs);
}

/* --- 终端兼容 --- */
.page-faq .faq-compat { margin-bottom: clamp(3rem, 8vw, 5.5rem); }
.page-faq .faq-compat__figure {
  margin: 0 0 clamp(1.25rem, 3vw, 2rem);
  border: 1px solid var(--orbit);
  overflow: hidden;
}
.page-faq .faq-compat__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-faq .compat-grid {
  display: grid;
  gap: 1.1rem;
}
.page-faq .compat-item {
  border-top: 1px solid var(--faq-line-soft);
  padding-top: 1rem;
}
.page-faq .compat-item__title {
  margin: 0 0 .55rem;
  font-size: var(--fs-md);
  font-weight: 800;
  letter-spacing: .02em;
  color: var(--starlight);
}
.page-faq .compat-item__text {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.85;
  color: var(--faq-ink-body);
}

/* --- 版本路径 --- */
.page-faq .faq-route { margin-bottom: clamp(3rem, 8vw, 5.5rem); }
.page-faq .route-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--faq-line-soft);
}
.page-faq .route-item {
  display: grid;
  grid-template-columns: 2.5rem 1fr;
  gap: 1rem;
  padding: 1.35rem 0;
  border-bottom: 1px solid var(--faq-line-soft);
  transition: background .2s var(--ease);
}
.page-faq .route-item:hover { background: rgba(17, 27, 62, .6); }
.page-faq .route-item__num {
  font-size: var(--fs-lg);
  line-height: 1.2;
  color: var(--violet);
  letter-spacing: .02em;
}
.page-faq .route-item__title {
  margin: 0 0 .5rem;
  font-size: var(--fs-md);
  font-weight: 800;
  letter-spacing: .02em;
}
.page-faq .route-item__body p {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.85;
  color: var(--faq-ink-body);
  max-width: 46em;
}
.page-faq .route-cta { margin: 1.6rem 0 0; }

/* --- 问答折叠 --- */
.page-faq .faq-qa { margin-bottom: clamp(3rem, 8vw, 5.5rem); }
.page-faq .faq-qa .accordion { border-top: 1px solid var(--faq-line-soft); }
.page-faq .accordion__item { border-bottom: 1px solid var(--paper-line); }
.page-faq .accordion__trigger {
  display: flex;
  align-items: center;
  gap: .9rem;
  width: 100%;
  text-align: left;
  background: none;
  border: 0;
  padding: 1.15rem .2rem;
  color: var(--starlight);
  font-size: var(--fs-sm);
  font-weight: 700;
  line-height: 1.6;
  cursor: pointer;
  transition: color .18s var(--ease);
}
.page-faq .accordion__trigger:hover { color: var(--pulse); }
.page-faq .accordion__index {
  flex: none;
  font-size: var(--fs-xs);
  color: var(--violet);
}
.page-faq .accordion__label { flex: 1 1 auto; }
.page-faq .accordion__sign {
  flex: none;
  width: .55rem;
  height: .55rem;
  border-right: 2px solid var(--obs);
  border-bottom: 2px solid var(--obs);
  transform: rotate(-45deg);
  transition: transform .2s var(--ease), border-color .2s var(--ease);
}
.page-faq .accordion__trigger[aria-expanded="true"] .accordion__sign {
  transform: rotate(45deg);
  border-color: var(--pulse);
}
.page-faq .accordion__panel {
  padding: 0 .2rem 1.2rem;
  border-top: 1px solid var(--paper-line);
  margin-top: -.2rem;
}
.page-faq .accordion__panel p {
  margin: 1rem 0 0;
  font-size: var(--fs-sm);
  line-height: 1.85;
  color: var(--faq-ink-body);
  max-width: 48em;
}

/* --- 反馈 --- */
.page-faq .faq-report { margin-bottom: clamp(1rem, 3vw, 2rem); }
.page-faq .report-card {
  display: grid;
  gap: 1.5rem;
  background: var(--nebula);
  border: 1px solid var(--faq-line-soft);
  border-top: 2px solid var(--orange);
  padding: clamp(1.4rem, 4vw, 2.25rem);
}
.page-faq .report-card__index {
  margin: 0 0 .75rem;
  font-size: var(--fs-xs);
  letter-spacing: .22em;
  color: var(--orange);
}
.page-faq .report-card__title {
  margin: 0 0 .7rem;
  font-size: clamp(1.4rem, 3.6vw, 1.95rem);
  font-weight: 900;
  line-height: 1.3;
  letter-spacing: .03em;
}
.page-faq .report-card__lead {
  margin: 0 0 1.35rem;
  font-size: var(--fs-sm);
  line-height: 1.8;
  color: var(--faq-ink-body);
}
.page-faq .report-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-faq .report-list li {
  display: grid;
  grid-template-columns: 6.5rem 1fr;
  gap: .75rem;
  padding: .8rem 0;
  border-top: 1px solid var(--faq-line-soft);
}
.page-faq .report-list__key {
  font-size: var(--fs-xs);
  color: var(--pulse);
  line-height: 1.8;
}
.page-faq .report-list__val {
  font-size: var(--fs-sm);
  line-height: 1.8;
  color: var(--faq-ink-body);
}
.page-faq .report-card__side {
  border: 1px solid var(--faq-line);
  border-left: 3px solid var(--orange);
  padding: 1.1rem 1.15rem 1.25rem;
  align-self: start;
}
.page-faq .report-side__key {
  margin: 0 0 .3rem;
  font-size: var(--fs-xs);
  letter-spacing: .16em;
  color: var(--obs);
}
.page-faq .report-side__value {
  margin: 0 0 1rem;
  font-size: var(--fs-sm);
  font-weight: 700;
  word-break: break-all;
  color: var(--starlight);
}
.page-faq .report-side__note {
  margin: 0 0 1.1rem;
  padding-top: .9rem;
  border-top: 1px solid var(--faq-line-soft);
  font-size: var(--fs-xs);
  line-height: 1.8;
  color: var(--obs);
}
.page-faq .report-side__cta { margin: 0; }

/* --- 响应式 --- */
@media (min-width: 700px) {
  .page-faq .faq-hero { grid-template-columns: 1.15fr .85fr; }
  .page-faq .faq-hero__figure { aspect-ratio: 5 / 6; }
  .page-faq .pc-grid { grid-template-columns: repeat(3, 1fr); }
  .page-faq .compat-grid { grid-template-columns: repeat(3, 1fr); }
  .page-faq .report-card { grid-template-columns: 1.5fr 1fr; }
}

@media (min-width: 860px) {
  .page-faq .check-track { grid-template-columns: repeat(3, 1fr); gap: 1.75rem; }
  .page-faq .check-card:not(:last-child)::after {
    content: "";
    position: absolute;
    top: 2.6rem;
    right: -1.75rem;
    width: 1.75rem;
    height: 1px;
    background: linear-gradient(90deg, var(--violet), transparent);
  }
  .page-faq .diag { grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr); gap: 1.75rem; }
  .page-faq .route-item { grid-template-columns: 4rem 1fr; }
}

@media (min-width: 1100px) {
  .page-faq .faq-hero { grid-template-columns: 1.25fr .75fr; }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .diag-result { animation: none; }
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
  }
}