.page-faq {
  --faq-pad: clamp(16px, 4vw, 40px);
  --faq-radius: 16px;
  background: var(--ink);
  color: var(--body-text);
  font-family: var(--font-sans);
  overflow-x: hidden;
  padding-bottom: 72px;
}

.page-faq .faq-shell {
  width: min(100% - 2 * var(--faq-pad), 1120px);
  margin-inline: auto;
}

.page-faq .faq-crumb-sep {
  color: var(--line-cyan);
}

.page-faq section[id] {
  scroll-margin-top: 88px;
}

/* ---------- 首屏状态板 ---------- */

.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  border-radius: var(--faq-radius);
  border: 1px solid var(--line-soft);
  margin-bottom: clamp(48px, 8vw, 88px);
}

.page-faq .faq-hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.38;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(56, 225, 230, 0.22), transparent 58%),
    linear-gradient(155deg, rgba(8, 16, 29, 0.94) 0%, rgba(8, 16, 29, 0.8) 45%, rgba(15, 27, 45, 0.95) 100%);
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 2;
  display: grid;
  gap: 28px;
  padding: clamp(28px, 5vw, 56px);
}

.page-faq .faq-hero h1 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(32px, 6vw, 58px);
  line-height: 1.12;
  letter-spacing: -0.01em;
  color: var(--white);
  margin: 12px 0 18px;
}

.page-faq .faq-hero .lede {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--body-text);
  max-width: 46ch;
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-faq .faq-board {
  align-self: start;
  background: rgba(22, 38, 61, 0.62);
  border: 1px solid var(--line-cyan);
  border-radius: 14px;
  padding: 22px;
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  box-shadow: 0 24px 48px -32px rgba(5, 10, 18, 0.92);
}

.page-faq .faq-board__title {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan);
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-soft);
}

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

.page-faq .faq-board__list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--body-text);
}

.page-faq .faq-board__list .dot {
  margin-top: 0.55em;
  flex: 0 0 auto;
}

.page-faq .faq-board__mail {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--line-soft);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--cyan);
  word-break: break-all;
}

/* ---------- 复制按钮 ---------- */

.page-faq .copy-btn {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.4;
  padding: 6px 14px;
  border-radius: 999px;
  border: 1px solid var(--line-cyan);
  background: transparent;
  color: var(--cyan);
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.page-faq .copy-btn:hover {
  background: rgba(56, 225, 230, 0.12);
}

.page-faq .copy-btn[data-copied] {
  background: var(--green);
  border-color: var(--green);
  color: var(--black);
}

/* ---------- 章节标题 ---------- */

.page-faq .faq-head {
  max-width: 62ch;
  margin-bottom: clamp(26px, 4vw, 42px);
}

.page-faq .faq-head h2 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(26px, 3.6vw, 42px);
  line-height: 1.22;
  color: var(--white);
  margin: 10px 0 14px;
}

.page-faq .faq-head p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

/* ---------- 快速诊断 ---------- */

.page-faq .faq-diag-grid {
  display: grid;
  gap: 14px;
}

.page-faq .faq-diag {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 20px 18px;
  border: 1px solid var(--line-soft);
  border-radius: 14px;
  background: linear-gradient(170deg, rgba(22, 38, 61, 0.78), rgba(15, 27, 45, 0.5));
  text-decoration: none;
  color: inherit;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.page-faq .faq-diag:hover,
.page-faq .faq-diag:focus-visible {
  border-color: var(--line-cyan);
  transform: translateY(-2px);
}

.page-faq .faq-diag__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-faq .faq-diag__title {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--white);
  line-height: 1.45;
}

.page-faq .faq-diag__desc {
  font-size: 13px;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .faq-diag__arrow {
  margin-top: auto;
  padding-top: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--orange);
}

.page-faq .faq-figure {
  position: relative;
  margin: clamp(20px, 3vw, 32px) 0 0;
  border-radius: var(--faq-radius);
  border: 1px solid var(--line-soft);
  overflow: hidden;
  background: var(--ink-2);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-faq .faq-figure__cap {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 28px 18px 14px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--white);
  background: linear-gradient(to top, rgba(5, 10, 18, 0.92), transparent);
}

/* ---------- 问答 ---------- */

.page-faq .faq-questions {
  margin-top: clamp(56px, 9vw, 104px);
}

.page-faq .faq-q-layout {
  display: grid;
  gap: 22px;
}

.page-faq .faq-toc {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 6px;
  scrollbar-width: thin;
}

.page-faq .faq-toc a {
  flex: 0 0 auto;
  white-space: nowrap;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--mist);
  text-decoration: none;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--line-soft);
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-faq .faq-toc a:hover,
.page-faq .faq-toc a:focus-visible {
  color: var(--cyan);
  border-color: var(--line-cyan);
}

.page-faq .faq-toc span {
  font-family: var(--font-mono);
  font-size: 11px;
  margin-left: 8px;
  color: var(--cyan);
}

.page-faq .faq-group {
  scroll-margin-top: 96px;
  margin-bottom: clamp(26px, 4vw, 40px);
}

.page-faq .faq-group:last-child {
  margin-bottom: 0;
}

.page-faq .faq-group h3 {
  margin: 0 0 6px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-soft);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

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

.page-faq .faq-item summary {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 16px 0;
  cursor: pointer;
  list-style: none;
  font-size: 15.5px;
  line-height: 1.65;
  color: var(--white);
}

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

.page-faq .faq-item summary::after {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--cyan);
}

.page-faq .faq-item[open] summary::after {
  content: "−";
}

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

.page-faq .faq-item__no {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-faq .faq-item__q {
  flex: 1 1 auto;
}

.page-faq .faq-item__a {
  padding: 0 0 20px 32px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--body-text);
}

.page-faq .faq-item__a p {
  margin: 0 0 10px;
}

.page-faq .faq-item__a p:last-child {
  margin-bottom: 0;
}

/* ---------- 更新时间 ---------- */

.page-faq .faq-update {
  margin-top: clamp(48px, 8vw, 96px);
  padding: clamp(26px, 4vw, 46px);
  border-radius: var(--faq-radius);
  background: var(--ink-2);
  border-left: 3px solid var(--cyan);
}

.page-faq .faq-update__inner {
  display: grid;
  gap: 28px;
}

.page-faq .faq-update h2 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(24px, 3.2vw, 36px);
  line-height: 1.25;
  color: var(--white);
  margin: 10px 0 14px;
}

.page-faq .faq-update p {
  margin: 0 0 12px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--body-text);
}

.page-faq .faq-update p:last-child {
  margin-bottom: 0;
}

.page-faq .faq-cadence {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-faq .faq-cadence li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px 14px;
  align-items: baseline;
  padding: 18px;
  border: 1px solid var(--line-soft);
  border-radius: 12px;
  background: rgba(22, 38, 61, 0.5);
}

.page-faq .faq-cadence__num {
  font-family: var(--font-mono);
  font-size: 34px;
  line-height: 1;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-cadence__unit {
  font-size: 13px;
  color: var(--mist);
}

.page-faq .faq-cadence__text {
  grid-column: 1 / -1;
  margin: 6px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--body-text);
}

/* ---------- 导出故障 ---------- */

.page-faq .faq-export {
  margin-top: clamp(48px, 8vw, 96px);
}

.page-faq .faq-export__grid {
  display: grid;
  gap: 14px;
  margin-bottom: 24px;
}

.page-faq .faq-format {
  padding: 22px;
  border-radius: 14px;
  border: 1px solid var(--line-soft);
  background: var(--ink-2);
}

.page-faq .faq-format strong {
  display: block;
  font-family: var(--font-mono);
  font-size: 22px;
  letter-spacing: 0.08em;
  color: var(--white);
  margin-bottom: 10px;
}

.page-faq .faq-format p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .faq-limit {
  padding: 22px;
  border-radius: 14px;
  border: 1px solid rgba(255, 122, 26, 0.55);
  background: rgba(255, 122, 26, 0.1);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 8px;
}

.page-faq .faq-limit__num {
  font-family: var(--font-mono);
  font-size: 46px;
  line-height: 1;
  color: var(--orange);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-limit p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--body-text);
}

.page-faq .faq-steps {
  padding: clamp(20px, 3vw, 28px);
  border-radius: 14px;
  border: 1px dashed var(--line-cyan);
  background: rgba(56, 225, 230, 0.05);
}

.page-faq .faq-steps h3 {
  margin: 0 0 16px;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--white);
}

.page-faq .faq-steps ol {
  counter-reset: faqstep;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-faq .faq-steps li {
  counter-increment: faqstep;
  position: relative;
  padding-left: 36px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--body-text);
}

.page-faq .faq-steps li::before {
  content: counter(faqstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

/* ---------- 联系 ---------- */

.page-faq .faq-contact {
  margin-top: clamp(56px, 9vw, 104px);
}

.page-faq .faq-contact__panel {
  display: grid;
  gap: 28px;
  padding: clamp(24px, 4vw, 44px);
  border-radius: var(--faq-radius);
  border: 1px solid var(--line-soft);
  background:
    radial-gradient(110% 80% at 100% 0%, rgba(255, 122, 26, 0.12), transparent 60%),
    linear-gradient(140deg, rgba(22, 38, 61, 0.92), rgba(15, 27, 45, 0.68));
}

.page-faq .faq-contact h2 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(24px, 3.2vw, 36px);
  line-height: 1.26;
  color: var(--white);
  margin: 10px 0 14px;
}

.page-faq .faq-contact__text p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--body-text);
}

.page-faq .faq-check {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.page-faq .faq-check li {
  position: relative;
  padding-left: 22px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--body-text);
}

.page-faq .faq-check li::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 0.62em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--orange);
}

.page-faq .faq-contact__channels {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-faq .faq-channel {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-channel__label {
  width: 100%;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-faq .faq-channel__value {
  flex: 1 1 auto;
  font-family: var(--font-mono);
  font-size: 14.5px;
  color: var(--cyan);
  word-break: break-all;
}

.page-faq .faq-contact__cta {
  margin-top: 18px;
  align-self: flex-start;
}

.page-faq .faq-contact__note {
  margin: 12px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .faq-contact__note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line-cyan);
}

.page-faq .faq-contact__note a:hover {
  color: var(--white);
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-faq .faq-diag-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-faq .faq-export__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr)) minmax(0, 0.85fr);
    align-items: stretch;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.85fr);
    gap: clamp(32px, 4vw, 56px);
    align-items: start;
  }

  .page-faq .faq-diag-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-q-layout {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: clamp(32px, 4vw, 52px);
    align-items: start;
  }

  .page-faq .faq-toc {
    position: sticky;
    top: 96px;
    flex-direction: column;
    overflow: visible;
    padding: 0 0 0 16px;
    border-left: 1px solid var(--line-soft);
  }

  .page-faq .faq-toc a {
    border: 0;
    border-radius: 0;
    padding: 9px 0;
    white-space: normal;
  }

  .page-faq .faq-update__inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.9fr);
    gap: clamp(32px, 4vw, 52px);
    align-items: center;
  }

  .page-faq .faq-contact__panel {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.85fr);
    gap: clamp(32px, 4vw, 52px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-diag,
  .page-faq .copy-btn,
  .page-faq .faq-toc a {
    transition: none;
  }

  .page-faq .faq-diag:hover,
  .page-faq .faq-diag:focus-visible {
    transform: none;
  }
}
<<<END>>>