/* ============ 帮助文档页 作用域 ============ */
.page-faq {
  --faq-rail: 214px;
  --faq-gap-y: clamp(40px, 6vw, 80px);
  --faq-sec-gap: clamp(56px, 8vw, 104px);
  display: block;
  padding-bottom: clamp(72px, 10vw, 140px);
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumb {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 24px 0 0;
  font-size: var(--fs-13);
  color: var(--dim);
}
.page-faq .breadcrumb a {
  color: var(--cy);
  text-decoration: none;
  transition: color 240ms var(--ease);
}
.page-faq .breadcrumb a:hover { color: var(--cy-soft); }

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(36px, 5.5vw, 76px) 0 clamp(48px, 6vw, 88px);
}
.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: -30% 45% 35% -15%;
  background: radial-gradient(closest-side, rgba(60, 224, 224, 0.13), transparent 72%);
  pointer-events: none;
}
.page-faq .faq-hero__inner {
  position: relative;
  display: grid;
  gap: clamp(32px, 5vw, 60px);
  grid-template-columns: 1fr;
}
@media (min-width: 960px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.65fr) minmax(250px, 0.85fr);
    align-items: end;
  }
}
.page-faq .faq-hero .display-1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.25rem, 6.4vw, 4.25rem);
  line-height: 1.03;
  letter-spacing: -0.02em;
  color: var(--head);
}
.page-faq .faq-hero .lede {
  margin: 22px 0 0;
  max-width: 60ch;
  font-size: clamp(1rem, 1.25vw, 1.125rem);
  line-height: 1.78;
  color: var(--text);
}
.page-faq .faq-hero__actions {
  margin-top: 30px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.page-faq .faq-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--ink-700);
  border: 1px solid var(--ink-700);
  border-radius: var(--r-md);
  overflow: hidden;
}
.page-faq .fact {
  background: var(--ink-800);
  padding: 16px 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.page-faq .fact__k {
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: var(--dim);
}
.page-faq .fact__v {
  font-size: var(--fs-24);
  line-height: 1;
  color: var(--cy);
  font-weight: 600;
}

/* ---------- 主体双栏 ---------- */
.page-faq .faq-shell {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 48px);
  margin-top: clamp(44px, 6vw, 84px);
}
@media (min-width: 1024px) {
  .page-faq .faq-shell {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: clamp(40px, 5vw, 80px);
  }
}

/* ---------- 左侧章节索引 ---------- */
.page-faq .faq-index { align-self: start; }
@media (min-width: 1024px) {
  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--bar-h) + 28px);
    max-height: calc(100vh - var(--bar-h) - 56px);
    overflow-y: auto;
    padding-right: 6px;
    border-left: 1px solid var(--ink-700);
    padding-left: 14px;
  }
}
.page-faq .faq-index__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.2em;
  color: var(--dim);
  text-transform: uppercase;
}
.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}
@media (min-width: 1024px) {
  .page-faq .faq-index__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }
}
.page-faq .faq-index__list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 14px;
  border-radius: var(--r-pill);
  border: 1px solid transparent;
  font-size: var(--fs-13);
  color: var(--dim);
  text-decoration: none;
  white-space: nowrap;
  transition: color 240ms var(--ease), background 240ms var(--ease), border-color 240ms var(--ease);
}
@media (min-width: 1024px) {
  .page-faq .faq-index__list a {
    border-radius: var(--r-sm);
    white-space: normal;
    padding: 9px 12px;
  }
}
.page-faq .faq-index__list a .mono {
  color: var(--cy);
  font-size: var(--fs-12);
  letter-spacing: 0.06em;
}
.page-faq .faq-index__list a:hover {
  color: var(--head);
  background: var(--ink-800);
  border-color: var(--ink-700);
}

/* ---------- 章节基本结构 ---------- */
.page-faq .faq-sec { scroll-margin-top: calc(var(--bar-h) + 24px); }
.page-faq .faq-sec + .faq-sec { margin-top: var(--faq-sec-gap); }
.page-faq .faq-sec__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: clamp(12px, 1.6vw, 20px);
  row-gap: 12px;
  align-items: baseline;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--ink-700);
  margin-bottom: clamp(24px, 3vw, 38px);
}
.page-faq .faq-sec__num {
  font-size: var(--fs-13);
  letter-spacing: 0.1em;
  color: var(--signal);
  padding-top: 4px;
}
.page-faq .faq-sec__head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.5rem, 3.2vw, 2.125rem);
  line-height: 1.22;
  letter-spacing: -0.015em;
  color: var(--head);
}
.page-faq .faq-sec__intro {
  grid-column: 2;
  margin: 0;
  max-width: 62ch;
  font-size: var(--fs-16);
  line-height: 1.75;
  color: var(--text);
}

/* ---------- 呼吸句 ---------- */
.page-faq .breath {
  margin: clamp(34px, 5vw, 60px) 0;
  padding: clamp(22px, 3.6vw, 40px) 0;
  border-top: 1px solid var(--ink-700);
  border-bottom: 1px solid var(--ink-700);
  max-width: 32ch;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.0625rem, 2.2vw, 1.5rem);
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--head);
}

/* ---------- 01 检查清单 ---------- */
.page-faq .check-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--ink-700);
  border: 1px solid var(--ink-700);
  border-radius: var(--r-lg);
  overflow: hidden;
}
@media (min-width: 720px) {
  .page-faq .check-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .page-faq .check-grid > .check:last-child { grid-column: 1 / -1; }
}
.page-faq .check {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(20px, 2.4vw, 28px);
  background: var(--ink-800);
}
.page-faq .check__idx {
  font-size: var(--fs-12);
  letter-spacing: 0.14em;
  color: var(--cy);
}
.page-faq .check h3 {
  margin: 0;
  font-size: var(--fs-18);
  font-weight: 700;
  color: var(--head);
}
.page-faq .check p {
  margin: 0;
  font-size: var(--fs-16);
  line-height: 1.72;
  color: var(--text);
}
.page-faq .check a {
  color: var(--cy);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}
.page-faq .check__alt {
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px dashed var(--ink-700);
  font-size: var(--fs-13);
  line-height: 1.65;
  color: var(--dim);
}

/* ---------- 02 四步安装 ---------- */
.page-faq .steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}
.page-faq .step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(14px, 2vw, 24px);
  padding: clamp(20px, 2.6vw, 30px) clamp(18px, 2.4vw, 28px);
  background: var(--ink-800);
  border: 1px solid var(--ink-700);
  border-left: 2px solid var(--cy);
  border-radius: 0 var(--r-md) var(--r-md) 0;
}
.page-faq .step__idx {
  font-size: clamp(1.25rem, 2.4vw, 1.75rem);
  line-height: 1;
  color: var(--cy);
  letter-spacing: -0.02em;
  padding-top: 2px;
}
.page-faq .step__body h3 {
  margin: 0 0 12px;
  font-size: var(--fs-18);
  font-weight: 700;
  color: var(--head);
  line-height: 1.4;
}
.page-faq .step__body p {
  margin: 0;
  font-size: var(--fs-16);
  line-height: 1.72;
  color: var(--text);
}
.page-faq .step__body a {
  color: var(--cy);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}
.page-faq .step__body p.step__ok,
.page-faq .step__body p.step__warn {
  margin-top: 12px;
  display: flex;
  gap: 8px;
  align-items: flex-start;
  padding-left: 12px;
  border-left: 2px solid var(--ink-700);
  font-size: var(--fs-13);
  line-height: 1.65;
}
.page-faq .step__body p.step__ok { border-color: var(--lime); }
.page-faq .step__body p.step__warn { border-color: var(--amber); }
.page-faq .step__body p.step__ok svg { color: var(--lime); flex: none; margin-top: 3px; }
.page-faq .step__body p.step__warn svg { color: var(--amber); flex: none; margin-top: 3px; }
.page-faq .step__body p.step__ok strong,
.page-faq .step__body p.step__warn strong {
  color: var(--head);
  font-weight: 600;
}

/* ---------- 图片 ---------- */
.page-faq .faq-fig {
  margin: clamp(24px, 3.4vw, 42px) 0 0;
}
.page-faq .faq-fig img {
  display: block;
  max-width: 100%;
  height: auto;
  border-radius: var(--r-md);
  border: 1px solid var(--ink-700);
  object-fit: cover;
}

/* ---------- 03 价目表 ---------- */
.page-faq .faq-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--fs-16);
  background: var(--ink-800);
  border: 1px solid var(--ink-700);
  border-radius: var(--r-md);
  overflow: hidden;
}
.page-faq .faq-table caption {
  caption-side: top;
  text-align: left;
  padding-bottom: 14px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.16em;
  color: var(--dim);
  text-transform: uppercase;
}
.page-faq .faq-table th,
.page-faq .faq-table td {
  padding: 13px 14px;
  text-align: left;
  vertical-align: baseline;
  border-bottom: 1px solid var(--ink-700);
}
.page-faq .faq-table thead th {
  background: var(--ink-700);
  font-size: var(--fs-12);
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--dim);
  text-transform: uppercase;
}
.page-faq .faq-table tbody th {
  font-size: var(--fs-16);
  font-weight: 500;
  color: var(--text);
  line-height: 1.6;
}
.page-faq .faq-table tbody td {
  color: var(--dim);
  white-space: nowrap;
}
.page-faq .faq-table tbody tr:last-child th,
.page-faq .faq-table tbody tr:last-child td { border-bottom: 0; }
.page-faq .faq-table .num {
  font-family: var(--font-mono);
  font-size: var(--fs-18);
  font-weight: 600;
  color: var(--cy);
  text-align: right;
  white-space: nowrap;
}
@media (max-width: 640px) {
  .page-faq .faq-table { font-size: var(--fs-13); }
  .page-faq .faq-table th,
  .page-faq .faq-table td { padding: 11px 10px; }
  .page-faq .faq-table tbody th { font-size: var(--fs-13); }
  .page-faq .faq-table .num { font-size: var(--fs-16); }
}

.page-faq .renew-note {
  margin-top: 20px;
  padding: 20px 22px;
  background: var(--ink-800);
  border: 1px solid var(--ink-700);
  border-left: 3px solid var(--amber);
  border-radius: 0 var(--r-md) var(--r-md) 0;
}
.page-faq .renew-note__label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.16em;
  color: var(--amber);
  text-transform: uppercase;
}
.page-faq .renew-note p {
  margin: 0;
  font-size: var(--fs-16);
  line-height: 1.75;
  color: var(--text);
}
.page-faq .renew-note p + p { margin-top: 10px; }

/* ---------- 04 大屏配置 ---------- */
.page-faq .screen-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
@media (min-width: 900px) {
  .page-faq .screen-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
.page-faq .screen-card {
  padding: clamp(20px, 2.4vw, 26px);
  background: var(--ink-800);
  border: 1px solid var(--ink-700);
  border-radius: var(--r-md);
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.page-faq .screen-card h3 {
  margin: 0;
  font-size: var(--fs-18);
  font-weight: 700;
  color: var(--head);
  padding-bottom: 10px;
  border-bottom: 1px solid var(--ink-700);
}
.page-faq .screen-card p {
  margin: 0;
  font-size: var(--fs-16);
  line-height: 1.72;
  color: var(--text);
}
.page-faq .screen-card a {
  color: var(--cy);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

/* ---------- 05 故障排查（展开条目） ---------- */
.page-faq .qa-list {
  border-top: 1px solid var(--ink-700);
}
.page-faq .qa {
  border-bottom: 1px solid var(--ink-700);
}
.page-faq .qa > summary {
  list-style: none;
  cursor: pointer;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: clamp(12px, 1.8vw, 20px);
  align-items: baseline;
  padding: clamp(16px, 2vw, 22px) 4px;
  transition: background 240ms var(--ease);
}
.page-faq .qa > summary::-webkit-details-marker { display: none; }
.page-faq .qa > summary::after {
  content: "+";
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 1.25rem;
  line-height: 1;
  color: var(--cy);
  transform-origin: 50% 50%;
  transition: transform 240ms var(--ease), color 240ms var(--ease);
}
.page-faq .qa[open] > summary::after {
  transform: rotate(45deg);
  color: var(--signal);
}
.page-faq .qa > summary:hover,
.page-faq .qa > summary:focus-visible {
  background: var(--ink-800);
  outline: none;
}
.page-faq .qa__no {
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
  color: var(--cy);
  padding-top: 4px;
}
.page-faq .qa__q {
  font-size: clamp(1rem, 1.4vw, 1.0625rem);
  font-weight: 600;
  line-height: 1.55;
  color: var(--head);
}
.page-faq .qa[open] .qa__q { color: var(--cy-soft); }
.page-faq .qa__body {
  padding: 0 4px clamp(18px, 2.2vw, 26px);
  display: grid;
  gap: 10px;
  border-left: 2px solid var(--ink-700);
  margin-left: 2px;
  padding-left: 14px;
}
.page-faq .qa__body p {
  margin: 0;
  font-size: var(--fs-16);
  line-height: 1.72;
  color: var(--text);
}
.page-faq .qa-tag {
  display: inline-block;
  min-width: 3em;
  margin-right: 6px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
  color: var(--dim);
}

/* ---------- 06 联系客服 ---------- */
.page-faq .support-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}
@media (min-width: 880px) {
  .page-faq .support-grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(280px, 1fr);
    gap: 24px;
  }
}
.page-faq .support-prep {
  padding: clamp(20px, 2.6vw, 30px);
  background: var(--ink-800);
  border: 1px solid var(--ink-700);
  border-radius: var(--r-md);
}
.page-faq .support-prep h3 {
  margin: 0 0 14px;
  font-size: var(--fs-18);
  font-weight: 700;
  color: var(--head);
}
.page-faq .support-list {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: pre;
  display: grid;
  gap: 14px;
}
.page-faq .support-list li {
  counter-increment: pre;
  position: relative;
  padding-left: 40px;
  font-size: var(--fs-16);
  line-height: 1.72;
  color: var(--text);
}
.page-faq .support-list li::before {
  content: counter(pre, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 3px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  color: var(--signal);
  letter-spacing: 0.06em;
}
.page-faq .support-list strong {
  display: block;
  color: var(--head);
  font-weight: 600;
  margin-bottom: 2px;
}
.page-faq .support-contact {
  padding: clamp(20px, 2.6vw, 30px);
  background: var(--ink-800);
  border: 1px solid var(--ink-700);
  border-left: 3px solid var(--cy);
  border-radius: 0 var(--r-md) var(--r-md) 0;
}
.page-faq .support-contact__label {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.18em;
  color: var(--cy);
  text-transform: uppercase;
}
.page-faq .support-meta {
  margin: 0;
  display: grid;
  gap: 14px;
}
.page-faq .support-meta dt {
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: var(--dim);
  margin-bottom: 4px;
}
.page-faq .support-meta dd {
  margin: 0;
  font-size: var(--fs-16);
  line-height: 1.65;
  color: var(--text);
  word-break: break-word;
}
.page-faq .support-meta dd:first-of-type,
.page-faq .support-meta dd:nth-of-type(2) {
  font-family: var(--font-mono);
  color: var(--head);
}
.page-faq .support-meta a {
  color: var(--cy);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}
.page-faq .support-meta a:hover { color: var(--cy-soft); }

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .qa > summary,
  .page-faq .qa > summary::after,
  .page-faq .faq-index__list a,
  .page-faq .breadcrumb a {
    transition: none;
  }
}
<<<END>>>