.page-faq {
  background: var(--deep);
  color: var(--mist);
  font-family: var(--font-sans);
  overflow-x: hidden;
}

/* ===== 章节索引 ===== */
.page-faq .chapter-rail {
  display: none;
}

@media (min-width: 1200px) {
  .page-faq {
    padding-left: var(--rail);
  }
  .page-faq .chapter-rail {
    display: block;
    position: fixed;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: var(--rail);
    z-index: 20;
  }
  .page-faq .chapter-rail__list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 0.8rem;
    justify-items: center;
  }
  .page-faq .chapter-rail__link {
    display: grid;
    justify-items: center;
    gap: 0.1rem;
    text-decoration: none;
    color: var(--silver);
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.04em;
    line-height: 1.3;
    transition: color var(--dur) var(--ease);
  }
  .page-faq .chapter-rail__no {
    font-size: 11px;
    color: var(--line);
    transition: color var(--dur) var(--ease);
  }
  .page-faq .chapter-rail__link:hover,
  .page-faq .chapter-rail__link[aria-current="true"] {
    color: var(--cyan);
  }
  .page-faq .chapter-rail__link[aria-current="true"] .chapter-rail__no {
    color: var(--orange);
  }
}

/* ===== 首屏 ===== */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(2.4rem, 6.5vw, 5.5rem) 0 clamp(2rem, 4.5vw, 3.2rem);
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(52, 226, 210, 0.12), transparent 58%),
    radial-gradient(90% 70% at 10% 10%, rgba(255, 107, 44, 0.06), transparent 60%),
    var(--deep);
}

.page-faq .faq-hero .breadcrumb {
  margin-bottom: 2rem;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--silver);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: 1.6rem;
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    column-gap: 3.5rem;
    align-items: end;
  }
}

.page-faq .faq-hero .eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan);
  border-left: 2px solid var(--cyan);
  padding-left: 0.65rem;
  margin-bottom: 1.1rem;
}

.page-faq .faq-hero .page-title {
  font-size: clamp(1.8rem, 4.6vw, 3.3rem);
  line-height: 1.16;
  letter-spacing: -0.02em;
  font-weight: 700;
  color: var(--mist);
  max-width: 17ch;
}

.page-faq .faq-hero .lede {
  font-size: 1.02rem;
  line-height: 1.85;
  color: var(--silver);
  max-width: 42ch;
}

/* ===== 章节标题工具 ===== */
.page-faq .faq-section-head {
  display: grid;
  gap: 0.55rem;
  margin-bottom: 2rem;
  max-width: 46rem;
}

@media (min-width: 760px) {
  .page-faq .faq-section-head {
    grid-template-columns: 2.6rem 1fr;
    column-gap: 1.1rem;
    align-items: baseline;
  }
  .page-faq .faq-section-head .section-title,
  .page-faq .faq-section-head .section-sub {
    grid-column: 2;
  }
}

.page-faq .faq-section-head .section-title {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 700;
  letter-spacing: -0.015em;
  color: var(--mist);
}

.page-faq .faq-section-head .section-sub {
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--silver);
}

/* ===== 自查卡 ===== */
.page-faq .faq-check {
  padding: clamp(2.4rem, 5.5vw, 4rem) 0 clamp(2.6rem, 6vw, 4.4rem);
  background: var(--night);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-faq .check-grid {
  display: grid;
  gap: 1rem;
}

@media (min-width: 780px) {
  .page-faq .check-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.2rem;
  }
}

.page-faq .check-card {
  display: flex;
  flex-direction: column;
  background: var(--slate);
  border-top: 2px solid var(--cyan);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  border-left: 1px solid var(--line);
  padding: 1.4rem 1.3rem 1.25rem;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-faq .check-card:nth-child(2) {
  border-top-color: var(--orange);
}

.page-faq .check-card:nth-child(3) {
  border-top-color: var(--amber);
}

.page-faq .check-card:hover {
  border-color: var(--cyan);
  transform: translateY(-2px);
}

.page-faq .check-card__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-faq .check-card__title {
  margin: 0.5rem 0 0.55rem;
  font-size: 1.22rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--mist);
}

.page-faq .check-card__verdict {
  margin-bottom: 1.1rem;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--silver);
}

.page-faq .check-card__steps {
  list-style: none;
  margin: 0 0 1.35rem;
  padding: 0;
  counter-reset: cstep;
  display: grid;
  gap: 0.55rem;
}

.page-faq .check-card__steps li {
  counter-increment: cstep;
  position: relative;
  padding-left: 2.1rem;
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--mist);
}

.page-faq .check-card__steps li::before {
  content: counter(cstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0.1em;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.04em;
  color: var(--silver);
  border: 1px solid var(--line);
  padding: 0.1em 0.35em;
}

.page-faq .check-card__more {
  margin-top: auto;
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--cyan);
  text-decoration: none;
  padding-bottom: 0.2rem;
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease);
}

.page-faq .check-card__more:hover {
  border-bottom-color: var(--cyan);
}

/* ===== 问答流 ===== */
.page-faq .qa-section {
  padding: clamp(2.2rem, 5vw, 3.6rem) 0;
}

.page-faq .qa-section + .qa-section,
.page-faq .faq-check + .qa-section {
  border-top: 1px solid var(--line);
}

.page-faq .qa-row {
  display: grid;
  gap: 1.2rem;
  scroll-margin-top: 6rem;
}

@media (min-width: 900px) {
  .page-faq .qa-row {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    column-gap: 3.5rem;
    align-items: start;
  }
}

.page-faq .qa-row__q {
  display: flex;
  align-items: baseline;
  gap: 0.85rem;
}

.page-faq .qa-row__q .chapter-no {
  flex: none;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-faq .qa-row__q .section-title {
  font-size: clamp(1.32rem, 2.3vw, 1.8rem);
  line-height: 1.32;
  font-weight: 700;
  letter-spacing: -0.012em;
  color: var(--mist);
}

.page-faq .qa-row__a > p {
  font-size: 1rem;
  line-height: 1.85;
  color: var(--silver);
  max-width: var(--measure);
}

.page-faq .qa-row__a > p + p {
  margin-top: 1rem;
}

.page-faq .qa-row__a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: border-color var(--dur) var(--ease);
}

.page-faq .qa-row__a a:hover {
  border-bottom-color: var(--cyan);
}

/* ===== 图像 ===== */
.page-faq .figure {
  margin: 1.6rem 0 0;
}

.page-faq .figure__frame {
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--slate);
}

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

.page-faq .figure__caption {
  margin-top: 0.7rem;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--silver);
}

/* ===== 三个回看维度 ===== */
.page-faq .dimension-list {
  list-style: none;
  margin: 1.6rem 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

@media (min-width: 720px) {
  .page-faq .dimension-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-faq .dimension-list li {
  background: var(--deep);
  padding: 1.05rem 1.15rem;
}

.page-faq .dimension__key {
  display: block;
  margin-bottom: 0.45rem;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-faq .dimension-list li p {
  font-size: 0.9rem;
  line-height: 1.68;
  color: var(--silver);
}

/* ===== 时间轴 ===== */
.page-faq .timeline-wrap {
  margin-top: 2rem;
}

.page-faq .timeline-wrap__hint {
  margin-bottom: 1rem;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.05em;
  color: var(--silver);
}

.page-faq .timeline {
  position: relative;
  padding-left: 2rem;
}

.page-faq .timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: var(--line);
}

.page-faq .tl-month {
  position: relative;
  padding-bottom: 0.9rem;
}

.page-faq .tl-month::before {
  content: "";
  position: absolute;
  left: -1.84rem;
  top: 0.4rem;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  box-sizing: border-box;
  background: var(--slate);
  border: 1px solid var(--line);
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .tl-month[open]::before {
  background: var(--orange);
  border-color: var(--orange);
  animation: faq-pulse 3s ease-in-out infinite;
}

.page-faq .tl-month summary {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  cursor: pointer;
  list-style: none;
  padding: 0.15rem 0 0.45rem;
}

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

.page-faq .tl-month__label {
  font-size: 1rem;
  font-weight: 700;
  color: var(--mist);
}

.page-faq .tl-month__count {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--silver);
}

.page-faq .tl-list {
  list-style: none;
  margin: 0.55rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.45rem;
}

.page-faq .tl-list li {
  display: grid;
  grid-template-columns: 3.4rem 6.6rem 4.4rem minmax(0, 1fr);
  gap: 0.8rem;
  align-items: baseline;
  padding: 0.6rem 0.8rem;
  background: var(--slate);
  border: 1px solid var(--line);
  font-size: 0.85rem;
  line-height: 1.6;
}

.page-faq .tl-time {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--orange);
  font-variant-numeric: tabular-nums;
}

.page-faq .tl-topic {
  color: var(--mist);
}

.page-faq .tl-dev {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--cyan);
}

.page-faq .tl-act {
  color: var(--silver);
  font-size: 0.84rem;
}

@media (max-width: 660px) {
  .page-faq .tl-list li {
    grid-template-columns: auto auto;
    justify-content: start;
    column-gap: 0.7rem;
    row-gap: 0.3rem;
  }
  .page-faq .tl-act {
    grid-column: 1 / -1;
  }
}

@keyframes faq-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(255, 107, 44, 0.32); }
  50% { box-shadow: 0 0 0 5px rgba(255, 107, 44, 0); }
}

/* ===== 保留规则 ===== */
.page-faq .rule-list {
  list-style: none;
  margin: 1.6rem 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.page-faq .rule-list li {
  display: grid;
  gap: 0.35rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--line);
}

@media (min-width: 720px) {
  .page-faq .rule-list li {
    grid-template-columns: 7.5rem minmax(0, 1fr);
    column-gap: 1.5rem;
    align-items: start;
  }
  .page-faq .rule-list li p {
    margin-top: 0.1rem;
  }
}

.page-faq .rule-list__key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--amber);
}

.page-faq .rule-list li p {
  font-size: 0.94rem;
  line-height: 1.78;
  color: var(--silver);
  max-width: 58ch;
}

/* ===== 四步排查 ===== */
.page-faq .step-list {
  counter-reset: chk;
  list-style: none;
  margin: 1.6rem 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-faq .step-list > li {
  counter-increment: chk;
  display: grid;
  grid-template-columns: 2.2rem minmax(0, 1fr);
  column-gap: 1rem;
  padding: 1.05rem 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .step-list > li::before {
  content: counter(chk, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--orange);
  padding-top: 0.15rem;
}

.page-faq .step-list strong {
  display: block;
  margin-bottom: 0.25rem;
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--mist);
}

.page-faq .step-list span {
  display: block;
  font-size: 0.9rem;
  line-height: 1.72;
  color: var(--silver);
}

/* ===== 设备适配 ===== */
.page-faq .device-layout {
  display: grid;
  gap: 1.6rem;
}

@media (min-width: 780px) {
  .page-faq .device-layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    column-gap: 2rem;
    align-items: start;
  }
  .page-faq .device-layout .figure {
    margin-top: 0;
  }
}

.page-faq .mini-steps {
  counter-reset: mini;
  list-style: none;
  margin: 1rem 0 1.15rem;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}

.page-faq .mini-steps li {
  counter-increment: mini;
  position: relative;
  padding-left: 1.9rem;
  font-size: 0.93rem;
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .mini-steps li::before {
  content: counter(mini);
  position: absolute;
  left: 0;
  top: 0.05em;
  width: 1.3rem;
  height: 1.3rem;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--deep);
  background: var(--cyan);
  border-radius: 50%;
}

.page-faq .device-layout__note {
  font-size: 0.86rem;
  line-height: 1.7;
  color: var(--silver);
  border-left: 2px solid var(--amber);
  padding-left: 0.8rem;
}

/* ===== 替代路径 ===== */
.page-faq .alt-list {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.8rem;
}

.page-faq .alt-list > li {
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr);
  column-gap: 0.9rem;
  padding: 0.95rem 1.05rem;
  background: var(--night);
  border-left: 2px solid var(--cyan);
  border-top: 1px solid var(--line);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-faq .alt-no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan);
  padding-top: 0.1rem;
}

.page-faq .alt-list h3 {
  margin-bottom: 0.3rem;
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--mist);
}

.page-faq .alt-list p {
  font-size: 0.89rem;
  line-height: 1.72;
  color: var(--silver);
}

.page-faq .alt-tail {
  margin-top: 1.3rem;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--silver);
}

/* ===== 人工支持 ===== */
.page-faq .qa-section--support {
  background: var(--night);
  border-top: 1px solid var(--line);
}

.page-faq .support-panel {
  display: grid;
  gap: 1.6rem;
}

@media (min-width: 820px) {
  .page-faq .support-panel {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    column-gap: 2.5rem;
    align-items: start;
  }
}

.page-faq .support-panel > div > p {
  font-size: 0.98rem;
  line-height: 1.85;
  color: var(--silver);
}

.page-faq .support-panel > div > p + p {
  margin-top: 0.9rem;
}

.page-faq .support-link {
  margin-top: 1.4rem;
}

.page-faq .support-meta {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .support-meta__row {
  display: grid;
  gap: 0.3rem;
  padding: 0.85rem 1rem;
  background: var(--slate);
}

@media (min-width: 560px) {
  .page-faq .support-meta__row {
    grid-template-columns: 5.4rem minmax(0, 1fr);
    column-gap: 1rem;
    align-items: baseline;
  }
}

.page-faq .support-meta__key {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--silver);
}

.page-faq .support-meta__val {
  font-size: 0.93rem;
  line-height: 1.65;
  color: var(--mist);
  word-break: break-word;
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .check-card,
  .page-faq .check-card__more,
  .page-faq .chapter-rail__link,
  .page-faq .tl-month::before {
    transition: none;
  }
  .page-faq .tl-month[open]::before {
    animation: none;
  }
  .page-faq .check-card:hover {
    transform: none;
  }
}
<<<END>>>