/* ===== 帮助中心 · 页面专属样式（作用域 .page-faq） ===== */

.page-faq {
  --faq-rail-w: 176px;
  --faq-gap: 22px;
  --faq-ink-soft: #4a4a46;
}

/* ---------- 面包屑下沿 ---------- */
.page-faq .breadcrumb {
  padding-top: 20px;
}

/* ---------- 首屏主题声明 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: 26px 0 30px;
  border-bottom: 1px solid var(--weave);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 4px;
  background: var(--weave-flag);
  background-size: 200% 100%;
}

.page-faq .faq-title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -0.02em;
  font-size: clamp(30px, 6.4vw, 56px);
  line-height: 1.1;
  color: var(--ink);
  max-width: 20ch;
}

.page-faq .faq-lede {
  margin: 18px 0 0;
  max-width: 64ch;
  font-size: 17px;
  line-height: 1.75;
  color: var(--ink);
}

.page-faq .faq-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 0;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-meta-item {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 0 18px;
  border-left: 3px solid var(--gold);
}

.page-faq .faq-meta-item:first-child {
  padding-left: 0;
  border-left: 0;
}

.page-faq .faq-meta-key {
  font-size: 13px;
  color: var(--mist);
  letter-spacing: 0.02em;
}

.page-faq .faq-meta-item .mono {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--navy);
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  padding-top: 32px;
  padding-bottom: 72px;
}

/* ---------- 步骤目录（移动端隐藏） ---------- */
.page-faq .faq-rail {
  display: none;
}

.page-faq .faq-rail-title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--mist);
  text-transform: uppercase;
}

.page-faq .faq-rail-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-left: 1px solid var(--weave);
}

.page-faq .faq-rail-link {
  display: grid;
  grid-template-columns: 30px 1fr;
  gap: 8px;
  align-items: baseline;
  padding: 9px 0 9px 12px;
  margin-left: -1px;
  border-left: 2px solid transparent;
  color: var(--navy);
  font-size: 14px;
  line-height: 1.5;
  text-decoration: none;
  transition: color 0.16s ease, border-color 0.16s ease;
}

.page-faq .faq-rail-link .mono {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--mist);
}

.page-faq .faq-rail-link:hover,
.page-faq .faq-rail-link:focus-visible {
  color: var(--flag-red);
  border-left-color: var(--flag-red);
}

.page-faq .faq-rail-link:hover .mono,
.page-faq .faq-rail-link:focus-visible .mono {
  color: var(--flag-red);
}

/* ---------- 面板流 ---------- */
.page-faq .faq-flow {
  display: flex;
  flex-direction: column;
  gap: var(--faq-gap);
  min-width: 0;
}

.page-faq .faq-block {
  position: relative;
  padding: 22px 18px 26px;
  background: var(--paper);
  border: 1px solid var(--weave);
  scroll-margin-top: 96px;
}

.page-faq .faq-block-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 12px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--weave);
}

.page-faq .faq-block-num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--flag-red);
  line-height: 1;
}

.page-faq .faq-block-num--dark {
  color: var(--gold);
}

.page-faq .faq-block-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(20px, 3.4vw, 28px);
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-faq .faq-block-lede {
  margin: 0 0 20px;
  max-width: 66ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--faq-ink-soft);
}

.page-faq .faq-block-lede--dark {
  color: rgba(244, 239, 230, 0.82);
}

/* ---------- 标签页 ---------- */
.page-faq .faq-tabs {
  margin-bottom: 24px;
}

.page-faq .faq-tablist {
  display: flex;
  flex-wrap: wrap;
  border: 1px solid var(--weave);
  border-bottom: 0;
  background: #fff;
}

.page-faq .faq-tab {
  appearance: none;
  flex: 1 1 auto;
  min-width: 104px;
  padding: 11px 14px;
  border: 0;
  border-right: 1px solid var(--weave);
  border-bottom: 1px solid var(--weave);
  background: transparent;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 600;
  color: var(--navy);
  cursor: pointer;
  transition: background 0.16s ease, color 0.16s ease;
}

.page-faq .faq-tab:last-child {
  border-right: 0;
}

.page-faq .faq-tab:hover {
  background: rgba(31, 138, 122, 0.08);
}

.page-faq .faq-tab[aria-selected="true"] {
  background: var(--navy);
  color: var(--gold);
  border-bottom-color: var(--navy);
  font-weight: 700;
}

.page-faq .faq-tab:focus-visible {
  outline: 2px solid var(--flag-red);
  outline-offset: -2px;
}

.page-faq .faq-tabpanel {
  padding: 6px 16px 14px;
  border: 1px solid var(--weave);
  background: #fff;
}

.page-faq .faq-tabpanel[hidden] {
  display: none;
}

.page-faq .faq-tabpanel-row {
  display: grid;
  gap: 4px;
  padding: 12px 0;
  border-bottom: 1px solid var(--weave);
}

.page-faq .faq-tabpanel-row:last-child {
  border-bottom: 0;
}

.page-faq .faq-tabpanel-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--jade);
}

.page-faq .faq-tabpanel-row p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
}

.page-faq .faq-tabpanel-row .chip {
  display: inline-block;
  padding: 5px 12px;
  border: 1px solid var(--weave);
  background: var(--paper);
  color: var(--navy);
  font-size: 13px;
  text-decoration: none;
  transition: border-color 0.16s ease, color 0.16s ease;
}

.page-faq .faq-tabpanel-row .chip:hover,
.page-faq .faq-tabpanel-row .chip:focus-visible {
  border-color: var(--flag-red);
  color: var(--flag-red);
}

/* ---------- 流程示意图 ---------- */
.page-faq .faq-flowfig {
  margin: 26px 0 0;
  padding: 0;
}

.page-faq .figure img {
  display: block;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--weave);
  background: #fff;
}

.page-faq .figure-caption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--mist);
}

/* ---------- 步骤折叠 ---------- */
.page-faq .faq-step {
  border-top: 1px solid var(--weave);
}

.page-faq .faq-step summary {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 14px 0;
  list-style: none;
  cursor: pointer;
}

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

.page-faq .faq-step summary::marker {
  content: "";
}

.page-faq .faq-step-num {
  flex: none;
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 1px solid var(--weave);
  background: #fff;
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 700;
  color: var(--flag-red);
  line-height: 1;
  transition: background 0.16s ease, color 0.16s ease, border-color 0.16s ease;
}

.page-faq .faq-step:hover .faq-step-num {
  border-color: var(--navy);
}

.page-faq .faq-step[open] .faq-step-num {
  background: var(--navy);
  border-color: var(--navy);
  color: var(--gold);
}

.page-faq .faq-step-title {
  flex: 1 1 auto;
  padding-top: 9px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--ink);
}

.page-faq .faq-step summary::after {
  flex: none;
  margin-left: auto;
  padding-top: 9px;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--jade);
  content: "+";
}

.page-faq .faq-step[open] summary::after {
  content: "−";
  color: var(--flag-red);
}

.page-faq .faq-step summary:focus-visible {
  outline: 2px solid var(--flag-red);
  outline-offset: 2px;
}

.page-faq .faq-step-body {
  padding: 0 0 18px 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink);
}

.page-faq .faq-step-body p {
  margin: 0;
  max-width: 66ch;
}

.page-faq .faq-step-body a {
  color: var(--flag-red);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-step-body a:hover,
.page-faq .faq-step-body a:focus-visible {
  color: var(--flag-red-deep);
}

/* ---------- 版本与环境：7/4 分栏 ---------- */
.page-faq .faq-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
}

.page-faq .faq-split-main {
  min-width: 0;
}

.page-faq .faq-version-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 26px;
  font-size: 15px;
}

.page-faq .faq-version-table caption {
  text-align: left;
}

.page-faq .faq-version-table th,
.page-faq .faq-version-table td {
  padding: 11px 12px;
  border: 1px solid var(--weave);
  text-align: left;
  vertical-align: top;
  line-height: 1.65;
}

.page-faq .faq-version-table thead th {
  background: var(--navy);
  color: var(--paper);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.page-faq .faq-version-table tbody tr:nth-child(even) {
  background: rgba(217, 210, 197, 0.28);
}

.page-faq .faq-version-table td.mono {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--jade);
  white-space: nowrap;
}

.page-faq .faq-subhead {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-faq .faq-subhead--dark {
  margin-top: 26px;
  color: var(--paper);
}

/* 自检清单 */
.page-faq .faq-checklist {
  margin: 0 0 26px;
  padding: 0;
  list-style: none;
}

.page-faq .faq-checklist li {
  display: grid;
  grid-template-columns: 16px 1fr;
  gap: 12px;
  align-items: start;
  padding: 11px 0;
  border-bottom: 1px solid var(--weave);
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
}

.page-faq .faq-checklist li:first-child {
  border-top: 1px solid var(--weave);
}

.page-faq .faq-check-mark {
  width: 14px;
  height: 14px;
  margin-top: 6px;
  border: 1px solid var(--jade);
  background: rgba(31, 138, 122, 0.14);
}

/* 代码块 */
.page-faq .faq-note-before {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--faq-ink-soft);
}

.page-faq .faq-code {
  border: 1px solid var(--navy);
  background: var(--navy);
  overflow: hidden;
}

.page-faq .faq-code-head {
  margin: 0;
  padding: 10px 14px;
  border-bottom: 1px solid rgba(244, 239, 230, 0.16);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gold);
}

.page-faq .faq-code-body {
  margin: 0;
  padding: 16px 14px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 2;
  color: var(--paper);
  white-space: pre;
}

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

/* 环境配图 */
.page-faq .faq-ambient {
  margin: 0;
}

/* ---------- 深色收尾面板 ---------- */
.page-faq .faq-block--dark {
  background: var(--navy);
  border-color: var(--navy);
  color: var(--paper);
}

.page-faq .faq-block--dark .faq-block-head {
  border-bottom-color: rgba(244, 239, 230, 0.2);
}

.page-faq .faq-block--dark h2 {
  color: var(--paper);
}

.page-faq .faq-contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: rgba(244, 239, 230, 0.2);
  border: 1px solid rgba(244, 239, 230, 0.2);
}

.page-faq .faq-contact-card {
  padding: 16px;
  background: var(--navy-soft);
}

.page-faq .faq-contact-label {
  margin: 0 0 6px;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: rgba(244, 239, 230, 0.68);
}

.page-faq .faq-contact-value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--gold);
  word-break: break-all;
}

.page-faq .faq-submit-list {
  margin: 0 0 24px;
  padding: 0;
  list-style: none;
  counter-reset: faq-submit;
}

.page-faq .faq-submit-list li {
  display: grid;
  grid-template-columns: 32px 1fr;
  gap: 12px;
  align-items: baseline;
  padding: 10px 0;
  border-bottom: 1px solid rgba(244, 239, 230, 0.16);
  font-size: 15px;
  line-height: 1.7;
  color: rgba(244, 239, 230, 0.88);
}

.page-faq .faq-submit-list li .mono {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--jade);
}

.page-faq .faq-inline-link {
  color: var(--gold);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-inline-link:hover,
.page-faq .faq-inline-link:focus-visible {
  color: var(--paper);
}

/* ---------- 断点：平板起 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-block {
    padding: 28px 26px 32px;
  }

  .page-faq .faq-step-body {
    padding-left: 56px;
  }

  .page-faq .faq-step-body p {
    max-width: 60ch;
  }

  .page-faq .faq-tabpanel-row {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 16px;
    align-items: baseline;
  }

  .page-faq .faq-contact-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 断点：桌面 ---------- */
@media (min-width: 1024px) {
  .page-faq .faq-hero {
    padding: 34px 0 40px;
  }

  .page-faq .faq-body {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: 48px;
    padding-top: 44px;
    padding-bottom: 96px;
  }

  .page-faq .faq-rail {
    display: block;
    position: sticky;
    top: 96px;
    align-self: start;
  }

  .page-faq .faq-rail-link {
    transition: color 0.16s ease;
  }

  .page-faq .faq-block {
    padding: 34px 40px 40px;
  }

  .page-faq .faq-flow {
    gap: 28px;
  }

  .page-faq .faq-split {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 40px;
    align-items: start;
  }

  .page-faq .faq-ambient {
    position: sticky;
    top: 96px;
  }

  .page-faq .faq-step-title {
    font-size: 17px;
  }

  .page-faq .faq-step-body {
    padding-left: 56px;
  }
}

/* ---------- 断点：宽屏 ---------- */
@media (min-width: 1280px) {
  .page-faq {
    --faq-rail-w: 200px;
  }

  .page-faq .faq-title {
    font-size: clamp(44px, 5vw, 62px);
  }
}

/* ---------- 减少动态效果 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-rail-link,
  .page-faq .faq-tab,
  .page-faq .faq-step-num {
    transition: none;
  }
}
<<<END>>>