.page-faq {
  --faq-cut: 14px;
  --faq-cut-lg: 20px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(16px, 2vw, 26px);
  align-items: end;
  padding-block: clamp(20px, 3vw, 36px) clamp(26px, 3.4vw, 44px);
  position: relative;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--amber) 0, var(--amber) 68px, var(--line-soft) 68px, var(--line-soft) 100%);
}

.page-faq .faq-hero-main {
  max-width: 760px;
}

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 4.4vw, 56px);
  line-height: 1.06;
  letter-spacing: 0.01em;
  color: var(--fg);
  margin: 10px 0 14px;
}

.page-faq .faq-hero .lead {
  font-size: 17px;
  line-height: 1.8;
  color: var(--fg-dim);
  max-width: 40ch;
  margin: 0 0 18px;
}

.page-faq .faq-hero-tags {
  gap: 8px;
}

.page-faq .faq-hero-note {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.2em;
  color: var(--fg-dim);
  white-space: nowrap;
  margin: 0;
  padding: 0;
  display: none;
}

/* ---------- 横向步骤条 ---------- */
.page-faq .faq-rail {
  position: sticky;
  top: 0;
  z-index: 4;
  margin-top: clamp(20px, 2.6vw, 32px);
  background: var(--paper);
  border-block: 1px solid rgba(16, 28, 61, 0.16);
}

.page-faq .faq-rail-inner {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 10px 0;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.page-faq .faq-rail-inner::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-rail-item {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  color: #223154;
  text-decoration: none;
  background: rgba(16, 28, 61, 0.05);
  border: 1px solid rgba(16, 28, 61, 0.18);
  clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
  transition: background 0.22s var(--ease), color 0.22s var(--ease), border-color 0.22s var(--ease);
}

.page-faq .faq-rail-item .mono {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  color: #7a869e;
}

.page-faq .faq-rail-item:hover,
.page-faq .faq-rail-item:focus-visible {
  background: var(--ink);
  color: #ffffff;
  border-color: var(--ink);
}

.page-faq .faq-rail-item:hover .mono,
.page-faq .faq-rail-item:focus-visible .mono {
  color: var(--amber);
}

/* ---------- 章节骨架 ---------- */
.page-faq .faq-section {
  padding-block: clamp(36px, 5vw, 62px);
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-section--last {
  border-bottom: 0;
}

.page-faq .faq-step-head {
  display: flex;
  gap: clamp(14px, 2vw, 22px);
  align-items: flex-start;
  margin-bottom: clamp(20px, 2.8vw, 32px);
}

.page-faq .faq-step-num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--amber);
  padding: 7px 11px;
  border: 1px solid var(--amber-deep);
  background: rgba(245, 160, 60, 0.1);
  clip-path: polygon(7px 0, 100% 0, 100% calc(100% - 7px), calc(100% - 7px) 100%, 0 100%, 0 7px);
}

.page-faq .faq-step-head h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(21px, 2.4vw, 32px);
  line-height: 1.18;
  letter-spacing: 0.01em;
  color: var(--fg);
  margin: 0 0 8px;
}

.page-faq .faq-step-head p {
  margin: 0;
  color: var(--fg-dim);
  font-size: 16px;
  line-height: 1.75;
  max-width: 48ch;
}

/* ---------- 编号步骤 ---------- */
.page-faq .faq-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .faq-step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  padding: clamp(14px, 1.8vw, 20px);
  background: var(--panel);
  border: 1px solid var(--line-soft);
  box-shadow: inset 3px 0 0 var(--celadon);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--faq-cut)), calc(100% - var(--faq-cut)) 100%, 0 100%);
}

.page-faq .faq-step--key {
  background: linear-gradient(180deg, rgba(245, 160, 60, 0.14), rgba(245, 160, 60, 0.04));
  border-color: rgba(245, 160, 60, 0.45);
  box-shadow: inset 3px 0 0 var(--amber);
}

.page-faq .faq-step-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--celadon);
  background: rgba(79, 179, 160, 0.14);
  border: 1px solid rgba(79, 179, 160, 0.42);
}

.page-faq .faq-step-index--key {
  color: var(--amber);
  background: rgba(245, 160, 60, 0.18);
  border-color: rgba(245, 160, 60, 0.55);
}

.page-faq .faq-step-body h3 {
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--fg);
  margin: 4px 0 6px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.page-faq .faq-step-body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--fg-dim);
  max-width: 56ch;
}

.page-faq .faq-path-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 12px;
}

.page-faq .faq-path {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13.5px;
  letter-spacing: 0.02em;
  color: var(--mark);
  background: rgba(255, 217, 160, 0.08);
  border: 1px dashed rgba(255, 217, 160, 0.36);
  padding: 6px 11px;
}

/* ---------- 图示 ---------- */
.page-faq .faq-figure {
  margin: clamp(20px, 3vw, 32px) 0 0;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: contain;
}

/* ---------- 导出区 ---------- */
.page-faq .faq-export {
  display: grid;
  gap: clamp(16px, 2vw, 24px);
  grid-template-columns: 1fr;
}

.page-faq .faq-steps--tight {
  gap: 10px;
}

.page-faq .faq-export-side {
  padding: clamp(16px, 2vw, 22px);
  background: var(--mist);
  border: 1px solid var(--line-soft);
  border-top: 2px solid var(--amber);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--faq-cut-lg)), calc(100% - var(--faq-cut-lg)) 100%, 0 100%);
  align-self: start;
}

.page-faq .faq-side-title {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--fg);
  margin: 0 0 14px;
  letter-spacing: 0.01em;
}

.page-faq .faq-side-list {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-side-list li {
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--fg-dim);
  padding-left: 12px;
  border-left: 2px solid var(--line);
}

.page-faq .faq-side-list .mono {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--mark);
  margin-right: 6px;
}

.page-faq .faq-side-note {
  margin: 0 0 14px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--fg-dim);
}

/* ---------- 更新前后对照 ---------- */
.page-faq .faq-compare {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-faq .faq-compare-col {
  padding: clamp(16px, 2vw, 22px);
  background: var(--mist);
  border: 1px solid var(--line-soft);
  clip-path: polygon(0 0, calc(100% - var(--faq-cut)) 0, 100% var(--faq-cut), 100% 100%, 0 100%);
}

.page-faq .faq-compare-col--after {
  background: rgba(79, 179, 160, 0.09);
  border-color: rgba(79, 179, 160, 0.42);
}

.page-faq .faq-mini-steps {
  list-style: none;
  margin: 14px 0 12px;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
}

.page-faq .faq-mini-steps li {
  position: relative;
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--fg);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--line);
  padding: 6px 10px;
}

.page-faq .faq-mini-steps li + li::before {
  content: "";
  position: absolute;
  left: -14px;
  top: 50%;
  width: 14px;
  height: 1px;
  background: var(--line);
}

.page-faq .faq-compare-col--after .faq-mini-steps li {
  color: var(--ink);
  background: var(--celadon);
  border-color: var(--celadon);
}

.page-faq .faq-compare-note {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
  color: var(--fg-dim);
}

.page-faq .faq-compare-col--after .faq-compare-note {
  color: var(--celadon);
}

.page-faq .faq-compare-sum {
  margin: clamp(18px, 2.4vw, 26px) 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--fg);
  max-width: 62ch;
  border-left: 3px solid var(--celadon);
  padding-left: 16px;
}

/* ---------- 检索工具 ---------- */
.page-faq .faq-tools {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-faq .faq-tool {
  padding: clamp(16px, 2vw, 22px);
  background: var(--panel);
  border: 1px solid var(--line-soft);
  border-bottom: 2px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--faq-cut)), calc(100% - var(--faq-cut)) 100%, 0 100%);
  transition: border-color 0.24s var(--ease), background 0.24s var(--ease);
}

.page-faq .faq-tool:hover {
  border-bottom-color: var(--amber);
  background: #2b3a68;
}

.page-faq .faq-tool-k {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--mark);
  background: rgba(255, 217, 160, 0.1);
  border: 1px solid rgba(255, 217, 160, 0.3);
  padding: 4px 9px;
  margin-bottom: 12px;
}

.page-faq .faq-tool h3 {
  font-family: var(--font-body);
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--fg);
  margin: 0 0 8px;
}

.page-faq .faq-tool p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--fg-dim);
}

/* ---------- 问答 ---------- */
.page-faq .faq-list {
  display: grid;
  gap: 10px;
}

.page-faq .faq-item {
  background: var(--mist);
  border: 1px solid var(--line-soft);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--faq-cut)), calc(100% - var(--faq-cut)) 100%, 0 100%);
  transition: border-color 0.24s var(--ease);
}

.page-faq .faq-item[open] {
  border-color: rgba(245, 160, 60, 0.4);
  background: #1f2c4f;
}

.page-faq .faq-q {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--fg);
}

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

.page-faq .faq-q:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: -3px;
}

.page-faq .faq-mark {
  position: relative;
  flex: 0 0 auto;
  width: 16px;
  height: 16px;
  margin-top: 4px;
}

.page-faq .faq-mark::before,
.page-faq .faq-mark::after {
  content: "";
  position: absolute;
  background: var(--amber);
  transition: transform 0.26s var(--ease), opacity 0.26s var(--ease);
}

.page-faq .faq-mark::before {
  left: 0;
  top: 7px;
  width: 16px;
  height: 2px;
}

.page-faq .faq-mark::after {
  left: 7px;
  top: 0;
  width: 2px;
  height: 16px;
}

.page-faq .faq-item[open] .faq-mark::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .faq-a {
  padding: 0 18px 18px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--fg-dim);
  max-width: 66ch;
}

.page-faq .faq-a p {
  margin: 0 0 8px;
}

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

.page-faq .faq-inline-link {
  color: var(--celadon);
  text-decoration: none;
  border-bottom: 1px solid rgba(79, 179, 160, 0.5);
  font-weight: 600;
  font-size: 14.5px;
}

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

/* ---------- 收尾联系 ---------- */
.page-faq .faq-help {
  padding: clamp(22px, 3.4vw, 44px);
}

.page-faq .faq-help h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(22px, 2.6vw, 34px);
  line-height: 1.15;
  color: var(--fg);
  margin: 14px 0 12px;
}

.page-faq .faq-help > p {
  margin: 0 0 20px;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--fg-dim);
  max-width: 56ch;
}

.page-faq .faq-help-list {
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-help-list li {
  font-size: 15px;
  line-height: 1.7;
  color: var(--fg-dim);
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: baseline;
}

.page-faq .faq-help-list .mono {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--mark);
  letter-spacing: 0.02em;
  flex: 0 0 auto;
  min-width: 190px;
}

.page-faq .faq-help-actions {
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-compare {
    grid-template-columns: 1fr 1fr;
  }

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

@media (min-width: 980px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .page-faq .faq-hero-note {
    display: block;
  }

  .page-faq .faq-export {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-steps {
    grid-template-columns: 1fr;
  }

  .page-faq .faq-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-rail-item,
  .page-faq .faq-tool,
  .page-faq .faq-item,
  .page-faq .faq-mark::before,
  .page-faq .faq-mark::after {
    transition: none;
  }
}
<<<END>>>