/* ===== 帮助文档 /guide/ ===== */
.page-faq {
  --faq-rail-w: 250px;
  --faq-paper-line: #D8CFC0;
  display: block;
}

/* ---- 首屏 ---- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(34px, 5.5vw, 78px) clamp(26px, 3.6vw, 46px);
  border-bottom: 1px solid var(--line);
}
.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  top: -140px;
  right: -160px;
  width: 440px;
  height: 440px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 229, 212, 0.15), rgba(0, 229, 212, 0) 68%);
  pointer-events: none;
}
.page-faq .faq-hero .wrap {
  position: relative;
  z-index: 1;
}
.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  max-width: 17ch;
}
.page-faq .faq-hero .lead {
  margin: 20px 0 0;
  max-width: 64ch;
  color: var(--text);
}

.page-faq .faq-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 40px;
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
}
.page-faq .faq-stats li {
  display: grid;
  gap: 4px;
  padding-left: 14px;
  border-left: 2px solid var(--line);
}
.page-faq .faq-stats li:first-child {
  border-left-color: var(--cyan);
}
.page-faq .stat-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 30px;
  line-height: 1.1;
  color: var(--text);
}
.page-faq .stat-label {
  font-size: var(--fs-13);
  color: var(--muted);
  letter-spacing: 0.04em;
}

/* ---- 总体骨架 ---- */
.page-faq .faq-shell {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  padding-block: 34px 88px;
}
@media (min-width: 1000px) {
  .page-faq .faq-shell {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }
}

/* ---- 左侧索引 ---- */
.page-faq .rail-sticky {
  display: grid;
  gap: 18px;
}
@media (min-width: 1000px) {
  .page-faq .rail-sticky {
    position: sticky;
    top: calc(var(--header-h) + var(--rail-h) + 28px);
  }
}

.page-faq .faq-nav {
  display: grid;
  gap: 2px;
  border-left: 1px solid var(--line);
}
.page-faq .faq-nav a {
  position: relative;
  display: block;
  padding: 7px 0 7px 14px;
  color: var(--muted);
  font-size: var(--fs-13);
  letter-spacing: 0.02em;
  text-decoration: none;
  transition: color var(--t) var(--ease);
}
.page-faq .faq-nav a::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 50%;
  width: 2px;
  height: 0;
  background: var(--cyan);
  transform: translateY(-50%);
  transition: height var(--t) var(--ease);
}
.page-faq .faq-nav a:hover {
  color: var(--text);
}
.page-faq .faq-nav a[data-active="true"] {
  color: var(--cyan);
}
.page-faq .faq-nav a[data-active="true"]::before {
  height: 64%;
}
.page-faq .faq-nav a:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
  border-radius: var(--r-sm);
}

.page-faq .faq-filter {
  display: grid;
  gap: 10px;
}
.page-faq .faq-filter .chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.page-faq .faq-filter .chip {
  font-size: 12px;
}

.page-faq .rail-tip {
  margin: 0;
  font-size: var(--fs-13);
  line-height: 1.7;
  color: var(--muted);
}
.page-faq .rail-tip a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 212, 0.38);
}

/* ---- 章节 ---- */
.page-faq .faq-docs {
  min-width: 0;
}
.page-faq .doc-section {
  padding-block: clamp(32px, 4.4vw, 58px);
  border-top: 1px solid var(--line-soft);
}
.page-faq .faq-docs > .doc-section:first-child {
  border-top: 0;
  padding-top: 0;
}
.page-faq .chapter-head {
  position: relative;
  display: grid;
  gap: 10px;
  margin: 0 0 24px;
}
.page-faq .chapter-head .chapter-num {
  position: absolute;
  top: -14px;
  right: 0;
  font-size: clamp(52px, 8vw, 100px);
  font-weight: 200;
  line-height: 1;
  color: var(--cyan);
  opacity: 0.11;
  pointer-events: none;
  user-select: none;
}
.page-faq .chapter-title {
  max-width: 22ch;
}
.page-faq .chapter-note {
  max-width: 62ch;
  color: var(--muted);
  line-height: 1.75;
  font-size: var(--fs-17);
}
.page-faq .chapter-note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 212, 0.38);
}

/* ---- 三步路径 ---- */
.page-faq .steps {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}
@media (min-width: 760px) {
  .page-faq .steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }
}
.page-faq .step {
  position: relative;
  padding: 24px 18px 22px;
  background: var(--ink-800);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  transition: transform var(--t) var(--ease), border-color var(--t) var(--ease);
}
.page-faq .step::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 18px;
  width: 38px;
  height: 2px;
  background: var(--cyan);
}
.page-faq .step:hover {
  transform: translateY(-4px);
  border-color: var(--cyan);
}
.page-faq .step-num {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 30px;
  line-height: 1;
  color: var(--cyan);
  opacity: 0.55;
}
.page-faq .step h3 {
  margin: 14px 0 8px;
  font-size: var(--fs-22);
  font-weight: 600;
  color: var(--text);
}
.page-faq .step p {
  margin: 0;
  font-size: var(--fs-17);
  line-height: 1.72;
  color: var(--muted);
}

/* ---- 图片 ---- */
.page-faq .faq-fig {
  margin: 28px 0 0;
}
.page-faq .faq-fig img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
}
.page-faq .faq-fig figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.03em;
  color: var(--muted);
}

/* ---- 对照结构图 ---- */
.page-faq .cmp-diagram {
  display: block;
  width: 100%;
  height: auto;
  margin: 0 0 24px;
}
.page-faq .cmp-parts {
  display: grid;
  gap: 16px;
  margin: 0 0 28px;
  padding: 0;
}
@media (min-width: 740px) {
  .page-faq .cmp-parts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px 26px;
  }
}
.page-faq .cmp-parts > div {
  padding-left: 14px;
  border-left: 2px solid var(--line);
}
.page-faq .cmp-parts dt {
  margin-bottom: 6px;
  font-size: var(--fs-13);
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--cyan);
}
.page-faq .cmp-parts dd {
  margin: 0;
  font-size: var(--fs-17);
  line-height: 1.75;
  color: var(--text);
}

.page-faq .doc-aside {
  margin: 24px 0 0;
  padding: 14px 18px;
  background: rgba(0, 229, 212, 0.06);
  border-left: 3px solid var(--cyan);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  font-size: var(--fs-17);
  line-height: 1.75;
  color: var(--text);
}
.page-faq .doc-aside a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 212, 0.42);
}

/* ---- 暖纸色问答条目 ---- */
.page-faq .doc-list {
  display: grid;
  gap: 10px;
}
.page-faq .doc-item {
  background: var(--paper);
  color: var(--paper-ink);
  border: 1px solid var(--faq-paper-line);
  border-radius: var(--r-md);
  transition: border-color var(--t) var(--ease), box-shadow var(--t) var(--ease);
}
.page-faq .doc-item:hover {
  border-color: #BFB3A0;
}
.page-faq .doc-item[open] {
  border-color: var(--orange);
  box-shadow: 0 14px 30px -22px rgba(0, 0, 0, 0.95);
}
.page-faq .doc-item > summary {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 18px 20px;
  cursor: pointer;
  list-style: none;
  font-size: var(--fs-17);
  font-weight: 600;
  line-height: 1.55;
}
.page-faq .doc-item > summary::-webkit-details-marker {
  display: none;
}
.page-faq .doc-item > summary::marker {
  content: "";
}
.page-faq .doc-item > summary:focus-visible {
  outline: 2px solid var(--paper-ink);
  outline-offset: 2px;
  border-radius: var(--r-sm);
}
.page-faq .doc-marker {
  position: relative;
  flex: none;
  width: 20px;
  height: 20px;
  margin-top: 3px;
}
.page-faq .doc-marker::before,
.page-faq .doc-marker::after {
  content: "";
  position: absolute;
  background: var(--paper-ink);
  transition: transform var(--t) var(--ease), opacity var(--t) var(--ease), background-color var(--t) var(--ease);
}
.page-faq .doc-marker::before {
  left: 4px;
  top: 9px;
  width: 12px;
  height: 2px;
}
.page-faq .doc-marker::after {
  left: 9px;
  top: 4px;
  width: 2px;
  height: 12px;
}
.page-faq .doc-item[open] .doc-marker::before {
  background: var(--orange);
}
.page-faq .doc-item[open] .doc-marker::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .doc-body {
  padding: 14px 20px 22px 56px;
  border-top: 1px solid var(--faq-paper-line);
}
.page-faq .doc-body p {
  margin: 0 0 12px;
  font-size: var(--fs-17);
  line-height: 1.78;
  color: #22282F;
}
.page-faq .doc-body p:last-child {
  margin-bottom: 0;
}

.page-faq .doc-steps {
  display: grid;
  gap: 10px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: faqstep;
}
.page-faq .doc-steps li {
  position: relative;
  padding-left: 40px;
  font-size: var(--fs-17);
  line-height: 1.7;
  color: #22282F;
}
.page-faq .doc-steps li::before {
  counter-increment: faqstep;
  content: counter(faqstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 1px;
  padding: 0 5px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  line-height: 18px;
  color: var(--orange);
  border: 1px solid var(--faq-paper-line);
  border-radius: var(--r-sm);
}

@media (max-width: 560px) {
  .page-faq .doc-body {
    padding-left: 20px;
  }
  .page-faq .faq-stats {
    gap: 14px 24px;
  }
}

/* ---- 人工支持 ---- */
.page-faq .help-panel {
  display: grid;
  gap: 20px;
  padding: 26px 22px;
  background: var(--ink-800);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
}
@media (min-width: 740px) {
  .page-faq .help-panel {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: center;
    gap: 32px;
    padding: 30px 28px;
  }
}
.page-faq .help-contact {
  display: grid;
  gap: 6px;
}
.page-faq .help-contact a {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--fs-22);
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 212, 0.35);
  justify-self: start;
}
.page-faq .help-contact a:hover {
  border-bottom-color: var(--cyan);
}
.page-faq .help-label {
  font-size: var(--fs-13);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}
.page-faq .help-label:not(:first-child) {
  margin-top: 10px;
}
.page-faq .help-side {
  display: grid;
  gap: 16px;
  justify-items: start;
}
.page-faq .help-note {
  margin: 0;
  font-size: var(--fs-17);
  line-height: 1.75;
  color: var(--text);
}

/* ---- 动效收敛 ---- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .step,
  .page-faq .doc-item,
  .page-faq .doc-marker::before,
  .page-faq .doc-marker::after,
  .page-faq .faq-nav a,
  .page-faq .faq-nav a::before {
    transition: none;
  }
  .page-faq .step:hover {
    transform: none;
  }
}
<<<END>>>