.page-products {
  --rail-w: 224px;
  --stage-pad: clamp(30px, 5vw, 56px);
  --stage-gap: clamp(34px, 5vw, 68px);
}

/* ---------- 首屏 ---------- */
.page-products .dl-hero {
  position: relative;
  padding-block: clamp(26px, 4vw, 52px) clamp(34px, 6vw, 76px);
  background:
    radial-gradient(120% 90% at 88% 0%, var(--violet-soft), transparent 58%),
    radial-gradient(90% 70% at 4% 100%, var(--cyan-soft), transparent 62%);
}

.page-products .dl-hero-grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  align-items: center;
}

.page-products .dl-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 6.4vw, 54px);
  line-height: 1.14;
  letter-spacing: -0.01em;
  margin: 14px 0 0;
  color: var(--text);
}

.page-products .dl-lead {
  margin: 20px 0 0;
  max-width: 34em;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.82;
  color: var(--text-dim);
}

.page-products .dl-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-products .dl-quickfacts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
}

.page-products .dl-quickfacts li {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 8px 16px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--text-dim);
  background: var(--panel-soft);
}

.page-products .dl-quickfacts strong {
  color: var(--cyan);
  font-weight: 500;
}

.page-products .dl-hero-media {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 24px 60px -32px rgba(5, 8, 15, 0.9);
}

/* ---------- 技能树骨架 ---------- */
.page-products .dl-tree {
  padding-block: clamp(38px, 6vw, 72px) clamp(40px, 6vw, 80px);
}

.page-products .tree-grid {
  display: grid;
  gap: clamp(22px, 3vw, 40px);
}

.page-products .tree-rail {
  position: relative;
}

.page-products .tree-nodes {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-products .tree-nodes > li {
  flex: 0 0 auto;
}

.page-products .tree-node {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 15px;
  border: 1px solid var(--line-soft);
  border-radius: 999px;
  color: var(--text-dim);
  text-decoration: none;
  white-space: nowrap;
  font-size: 13px;
  transition: color 0.18s ease, border-color 0.18s ease, background-color 0.18s ease;
}

.page-products .node-dot {
  width: 8px;
  height: 8px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--line);
}

.page-products .node-index {
  font-size: 12px;
  color: var(--text-faint);
}

.page-products .tree-node.is-active,
.page-products .tree-node:hover,
.page-products .tree-node:focus-visible {
  color: var(--text);
  border-color: var(--violet);
  background: var(--violet-soft);
}

.page-products .tree-node.is-active .node-dot {
  background: var(--cyan);
  box-shadow: 0 0 0 4px var(--cyan-soft);
}

.page-products .tree-node.is-active .node-index {
  color: var(--cyan);
}

/* ---------- 阶段面板 ---------- */
.page-products .tree-panels {
  display: grid;
}

.page-products .tree-panel {
  padding-block: var(--stage-pad);
  border-top: 1px solid var(--line-soft);
  scroll-margin-top: 118px;
}

.page-products .tree-panel:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-products .tree-panel:last-child {
  padding-bottom: 0;
}

.page-products .stage-tag {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--orange);
}

.page-products .stage-title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(21px, 3.2vw, 30px);
  line-height: 1.32;
  color: var(--text);
}

.page-products .stage-goal {
  margin: 14px 0 0;
  max-width: 40em;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--text-dim);
}

.page-products .text-link {
  color: var(--cyan);
  text-decoration: underline;
  text-decoration-color: var(--cyan-soft);
  text-underline-offset: 3px;
}

.page-products .text-link:hover {
  text-decoration-color: var(--cyan);
}

/* ---------- 版本选择 ---------- */
.page-products .dl-picks {
  display: grid;
  gap: 14px;
  margin-top: 28px;
}

.page-products .pick-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: clamp(18px, 2.4vw, 26px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel-soft);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.page-products .pick-card:hover {
  transform: translateY(-2px);
  border-color: var(--violet);
}

.page-products .pick-card--primary {
  border-color: rgba(249, 115, 22, 0.5);
  box-shadow: inset 0 0 0 1px rgba(249, 115, 22, 0.1);
}

.page-products .pick-os {
  margin: 0;
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--violet);
}

.page-products .pick-name {
  margin: 0;
  font-size: 17.5px;
  font-weight: 800;
  color: var(--text);
}

.page-products .pick-req {
  margin: 0;
  font-size: 14px;
  color: var(--text-dim);
}

.page-products .pick-size {
  margin: 4px 0 0;
  font-size: 22px;
  color: var(--cyan);
  letter-spacing: -0.01em;
}

.page-products .pick-note {
  margin: 4px 0 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--text-faint);
}

.page-products .pick-card .btn {
  margin-top: 16px;
  align-self: flex-start;
}

/* ---------- 系统要求表 ---------- */
.page-products .table-scroll {
  margin-top: 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow-x: auto;
  background: var(--bg-night);
}

.page-products .req-table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  font-size: 14px;
}

.page-products .table-caption {
  caption-side: top;
  text-align: left;
  padding: 16px 18px 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--text-faint);
}

.page-products .req-table th,
.page-products .req-table td {
  text-align: left;
  padding: 13px 18px;
  border-bottom: 1px solid var(--line-soft);
  color: var(--text-dim);
}

.page-products .req-table thead th {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--text-faint);
  text-transform: uppercase;
}

.page-products .req-table tbody th {
  color: var(--text);
  font-weight: 600;
  white-space: nowrap;
}

.page-products .req-table tbody tr:last-child th,
.page-products .req-table tbody tr:last-child td {
  border-bottom: 0;
}

.page-products .req-table td.ok::before {
  content: "✓";
  margin-right: 8px;
  font-family: var(--font-mono);
  color: var(--green);
}

.page-products .req-table td.no {
  color: var(--text-faint);
  text-decoration: line-through;
  text-decoration-color: var(--orange);
}

.page-products .req-table td.val {
  font-family: var(--font-mono);
  color: var(--cyan);
}

.page-products .table-foot {
  margin: 14px 0 0;
  max-width: 40em;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--text-faint);
}

/* ---------- 通用配图 ---------- */
.page-products .tree-figure {
  margin: 30px 0 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-products .tree-figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-products .tree-figure .media-caption {
  display: block;
  padding: 11px 16px;
  border-top: 1px solid var(--line-soft);
  background: var(--bg-night);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-faint);
}

/* ---------- 安装步骤 ---------- */
.page-products .step-list {
  display: grid;
  gap: 10px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
}

.page-products .step-list .disclosure {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel-soft);
  transition: border-color 0.2s ease;
}

.page-products .step-list .disclosure[open] {
  border-color: rgba(34, 211, 238, 0.42);
}

.page-products .step-list summary {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 15px 18px;
  cursor: pointer;
  list-style: none;
  color: var(--text);
  font-weight: 700;
  font-size: 15px;
}

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

.page-products .step-num {
  font-size: 12.5px;
  color: var(--orange);
  letter-spacing: 0.06em;
  flex: 0 0 auto;
}

.page-products .step-name {
  flex: 1 1 auto;
}

.page-products .step-cost {
  font-size: 12px;
  color: var(--text-faint);
  white-space: nowrap;
}

.page-products .disclosure-body {
  padding: 0 18px 18px 18px;
}

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

/* ---------- 首次登录 ---------- */
.page-products .login-grid {
  display: grid;
  gap: 14px;
  margin-top: 28px;
}

.page-products .login-item {
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--violet);
  border-radius: var(--radius);
  background: var(--panel-soft);
}

.page-products .login-title {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 800;
  color: var(--text);
}

.page-products .login-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.82;
  color: var(--text-dim);
}

.page-products .branch-box {
  margin-top: 26px;
  padding: clamp(18px, 2.4vw, 26px);
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  background: var(--bg-night);
}

.page-products .branch-lead {
  margin: 0 0 16px;
  font-size: 14.5px;
  color: var(--text);
  font-weight: 700;
}

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

.page-products .branch-list li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-products .branch-foot {
  margin: 18px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-dim);
}

/* ---------- 成因筛选 ---------- */
.page-products .cause-block {
  margin-top: 28px;
}

.page-products .cause-block .filter-bar {
  margin-bottom: 18px;
}

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

.page-products .cause-card {
  display: grid;
  gap: 10px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--orange);
  border-radius: var(--radius);
  background: var(--panel-soft);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.page-products .cause-card:hover {
  transform: translateY(-2px);
  border-color: var(--line);
  border-left-color: var(--orange);
}

.page-products .cause-head {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.page-products .cause-idx {
  font-size: 13px;
  color: var(--orange);
}

.page-products .cause-title {
  margin: 0;
  font-size: 16.5px;
  font-weight: 800;
  color: var(--text);
}

.page-products .cause-fix {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--text-dim);
}

.page-products .cause-fix strong {
  color: var(--text);
  font-weight: 700;
}

.page-products .cause-foot {
  margin: 22px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-dim);
}

/* ---------- 更新与兼容 ---------- */
.page-products .cadence {
  display: grid;
  gap: 14px;
  margin-top: 28px;
}

.page-products .cadence-card {
  padding: 20px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-night);
}

.page-products .cadence-card .data-value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(30px, 4vw, 42px);
  line-height: 1;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-products .cadence-card .data-label {
  display: block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--text-dim);
}

.page-products .cadence-card p {
  margin: 12px 0 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--text-faint);
}

.page-products .test-note {
  margin-top: 26px;
  padding: clamp(18px, 2.4vw, 26px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel-soft);
}

.page-products .test-title {
  margin: 0 0 14px;
  font-size: 16px;
  font-weight: 800;
  color: var(--text);
}

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

.page-products .test-list li {
  position: relative;
  padding-left: 22px;
  font-size: 14px;
  line-height: 1.82;
  color: var(--text-dim);
}

.page-products .test-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 10px;
  height: 1px;
  background: var(--cyan);
}

.page-products .test-foot {
  margin: 18px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-dim);
}

/* ---------- 底部快捷条 ---------- */
.page-products .dl-fastbar {
  margin-top: clamp(40px, 6vw, 76px);
  border-top: 1px solid var(--line);
  background: rgba(5, 8, 15, 0.94);
}

.page-products .dl-fastbar-inner {
  display: flex;
  flex-direction: column;
  gap: 14px;
  align-items: flex-start;
  padding-block: 16px;
}

.page-products .fastbar-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-dim);
}

.page-products .dl-fastbar .btn {
  flex: 0 0 auto;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-products .dl-picks {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

  .page-products .dl-fastbar-inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

@media (min-width: 900px) {
  .page-products .dl-hero-grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  }
}

@media (min-width: 980px) {
  .page-products .tree-grid {
    grid-template-columns: var(--rail-w) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 56px);
  }

  .page-products .tree-rail {
    position: sticky;
    top: 112px;
    align-self: start;
  }

  .page-products .tree-rail::before {
    content: "";
    position: absolute;
    left: 17px;
    top: 14px;
    bottom: 14px;
    width: 1px;
    background: linear-gradient(180deg, var(--cyan), rgba(34, 211, 238, 0.06));
    opacity: 0.55;
    pointer-events: none;
  }

  .page-products .tree-nodes {
    flex-direction: column;
    gap: 4px;
    overflow: visible;
    padding: 0;
  }

  .page-products .tree-nodes > li {
    flex: 0 1 auto;
  }

  .page-products .tree-node {
    border-radius: var(--radius-sm);
    border-color: transparent;
    padding: 11px 12px;
    white-space: normal;
    font-size: 13.5px;
  }

  .page-products .node-label {
    flex: 1 1 auto;
  }

  .page-products .dl-fastbar {
    position: sticky;
    bottom: 0;
    z-index: 6;
    backdrop-filter: blur(10px);
  }
}
<<<END>>>