.page-products {
  --p-warm: #FF7A2F;
  --p-rail: rgba(37, 227, 196, .42);
  padding-block: clamp(22px, 5vw, 44px) clamp(48px, 9vw, 92px);
}

/* ---------- 面包屑 ---------- */
.page-products .crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--muted);
  margin-bottom: clamp(18px, 4vw, 30px);
}
.page-products .crumbs a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}
.page-products .crumbs a:hover,
.page-products .crumbs a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}
.page-products .crumbs span[aria-current="page"] { color: var(--text); }

/* ---------- 首屏 ---------- */
.page-products .phead {
  position: relative;
  padding-bottom: clamp(26px, 5vw, 44px);
  border-bottom: 1px solid var(--line);
  margin-bottom: clamp(30px, 6vw, 56px);
}
.page-products .phead::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: clamp(56px, 16vw, 132px);
  height: 2px;
  background: var(--cyan);
}
.page-products .phead__kicker {
  margin: 0 0 14px;
  font-size: 11px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--cyan);
}
.page-products .phead__title {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(27px, 6.6vw, 50px);
  line-height: 1.16;
  letter-spacing: -.02em;
  margin: 0 0 18px;
  max-width: 17em;
  color: var(--text);
}
.page-products .phead__lede {
  margin: 0;
  max-width: 46em;
  font-size: clamp(15px, 3.9vw, 17px);
  line-height: 1.78;
  color: var(--muted);
}
.page-products .phead__meta {
  margin: 18px 0 0;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--muted);
}

/* ---------- 章节通用 ---------- */
.page-products .section-head { margin: 0 0 clamp(16px, 3vw, 24px); }
.page-products .section-num { display: block; line-height: .82; margin: 0 0 8px; }
.page-products .section-title {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(20px, 4.4vw, 27px);
  letter-spacing: -.01em;
  line-height: 1.25;
  margin: 0 0 8px;
  color: var(--text);
}
.page-products .section-sub {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 技能树 ---------- */
.page-products .tree {
  position: relative;
  margin-top: 6px;
}
.page-products .tree__svg { display: none; }
.page-products .tree__nodes {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}
.page-products .tree__nodes > li { min-width: 0; }

.page-products .tree-node {
  display: flex;
  flex-direction: column;
  gap: 3px;
  height: 100%;
  padding: 12px 14px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan);
  border-radius: var(--r);
  text-decoration: none;
  color: var(--text);
  min-width: 0;
  transition: transform .2s var(--ease), border-color .2s var(--ease), background .2s var(--ease);
}
.page-products .tree-node__idx {
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--cyan);
}
.page-products .tree-node__name {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 15px;
  line-height: 1.3;
}
.page-products .tree-node__meta {
  font-size: 12px;
  color: var(--muted);
  line-height: 1.4;
}
.page-products .tree-node:hover,
.page-products .tree-node:focus-visible {
  background: var(--ink-800);
  border-color: var(--cyan);
  transform: translateY(-2px);
}

.page-products .tree__note {
  margin-top: 18px;
  padding-left: 14px;
  border-left: 2px solid var(--line);
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 路径上的堆叠面板 ---------- */
.page-products .route {
  display: grid;
  gap: clamp(20px, 4vw, 30px);
  margin-top: clamp(34px, 7vw, 62px);
}
.page-products .stop {
  width: 100%;
  min-width: 0;
  padding: clamp(20px, 4.4vw, 30px);
}
.page-products .stop > * { min-width: 0; }

.page-products .plate__split {
  display: grid;
  gap: clamp(16px, 3.2vw, 28px);
}
.page-products .plate__body {
  display: grid;
  gap: clamp(14px, 2.6vw, 20px);
  align-content: start;
}
.page-products .plate__text {
  margin: 0;
  font-size: clamp(15px, 3.8vw, 16px);
  line-height: 1.78;
  color: var(--text);
}
.page-products .plate__h3 {
  margin: 4px 0 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: .04em;
  color: var(--muted);
}

/* ---------- 数据卡 ---------- */
.page-products .cardgrid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}
.page-products .unit {
  font-size: .62em;
  margin-left: 2px;
  color: var(--muted);
}

/* ---------- 字段清单 ---------- */
.page-products .fieldlist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}
.page-products .fieldlist li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--line);
  font-size: 14px;
  line-height: 1.6;
  color: var(--text);
}
.page-products .fieldlist li::before {
  content: "";
  flex: none;
  width: 6px;
  height: 6px;
  background: var(--cyan);
}
.page-products .fieldlist--warm li::before { background: var(--p-warm); }
.page-products .fieldlist .mono {
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--muted);
  min-width: 24px;
}

/* ---------- 分界双色带 ---------- */
.page-products .band { margin: 2px 0 4px; }
.page-products .band__bar {
  height: 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: linear-gradient(90deg,
    var(--cyan) 0%,
    rgba(37, 227, 196, .12) 38%,
    rgba(255, 77, 109, .12) 62%,
    var(--danger) 100%);
}
.page-products .band__ends {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 8px;
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--muted);
}
.page-products .band__end--up { color: var(--cyan); }
.page-products .band__end--down { color: var(--danger); }

/* ---------- 指标 ---------- */
.page-products .metrics {
  display: grid;
  gap: clamp(20px, 4vw, 28px);
}
.page-products .metric {
  display: grid;
  gap: clamp(16px, 3vw, 24px);
}
.page-products .metric__text {
  display: grid;
  gap: 12px;
  align-content: start;
}
.page-products .metric__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 18px;
  letter-spacing: .01em;
  color: var(--text);
  padding-left: 12px;
  border-left: 3px solid var(--violet);
}
.page-products .metric__note {
  margin: 0;
  padding: 12px 14px;
  background: var(--ink-800);
  border: 1px solid var(--line);
  border-radius: var(--r);
  font-size: 13.5px;
  line-height: 1.78;
  color: var(--muted);
}
.page-products .specs {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 6px;
}
.page-products .specs li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--text);
}
.page-products .specs__k {
  flex: none;
  min-width: 46px;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--violet);
}
.page-products .specs__v { color: var(--muted); }

/* ---------- 图片 ---------- */
.page-products .shot {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: var(--ink-800);
  overflow: hidden;
}
.page-products .shot img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-bottom: 1px solid var(--line);
}
.page-products .shot figcaption {
  padding: 10px 12px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--muted);
}
.page-products .shot--wide { margin-top: clamp(16px, 3vw, 24px); }

/* ---------- 阅读顺序 ---------- */
.page-products .paths {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.page-products .path {
  padding: 16px 16px 16px 18px;
  background: var(--ink-800);
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan);
  border-radius: var(--r);
}
.page-products .path:nth-child(2) { border-left-color: var(--p-warm); }
.page-products .path:nth-child(3) { border-left-color: var(--violet); }
.page-products .path__title {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 16px;
  line-height: 1.35;
  color: var(--text);
}
.page-products .path__desc {
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}
.page-products .path__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 0;
}
.page-products .path__steps li {
  position: relative;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .02em;
  color: var(--text);
  padding: 5px 11px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 999px;
}
.page-products .path__steps li:not(:last-child) {
  margin-right: 22px;
}
.page-products .path__steps li:not(:last-child)::after {
  content: "→";
  position: absolute;
  right: -17px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--muted);
  font-size: 12px;
}

/* ---------- 面板收束 ---------- */
.page-products .pfoot {
  margin-top: clamp(22px, 4vw, 30px);
  padding-top: clamp(18px, 3.4vw, 24px);
  border-top: 1px dashed var(--line);
  display: grid;
  gap: 16px;
}
.page-products .pfoot__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 62em;
}
.page-products .pfoot__btns {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 平板与桌面 ---------- */
@media (min-width: 700px) {
  .page-products .tree__nodes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-products .plate__split {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
    align-items: start;
  }
  .page-products .metric {
    grid-template-columns: minmax(0, 1fr) minmax(0, 260px);
    align-items: start;
  }
  .page-products .pfoot {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
  .page-products .pfoot__btns { justify-content: flex-end; }
  .page-products .shot--wide { margin-top: 0; }
}

@media (min-width: 940px) {
  .page-products .stop:nth-child(1) { width: 100%; }
  .page-products .stop:nth-child(2) { width: 86%; margin-left: auto; }
  .page-products .stop:nth-child(3) { width: 92%; }
  .page-products .stop:nth-child(4) { width: 100%; }
  .page-products .stop:nth-child(5) { width: 86%; margin-left: auto; }

  .page-products .tree {
    aspect-ratio: 1000 / 520;
    margin-top: 12px;
  }
  .page-products .tree__svg {
    display: block;
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
  }
  .page-products .tree__rail {
    fill: none;
    stroke: var(--p-rail);
    stroke-width: 2;
    stroke-dasharray: 7 9;
    stroke-linecap: round;
  }
  .page-products .tree__dots circle {
    fill: var(--panel);
    stroke: var(--cyan);
    stroke-width: 2;
  }
  .page-products .tree__nodes {
    display: block;
    position: static;
    height: 100%;
  }
  .page-products .tree-node {
    position: absolute;
    width: 172px;
    align-items: center;
    text-align: center;
    transform: translate(-50%, -50%);
    padding: 11px 12px;
  }
  .page-products .tree-node:hover,
  .page-products .tree-node:focus-visible {
    transform: translate(-50%, calc(-50% - 4px));
  }
  .page-products .tree__nodes > li:nth-child(1) .tree-node { left: 8%; top: 75%; }
  .page-products .tree__nodes > li:nth-child(2) .tree-node { left: 26%; top: 52%; }
  .page-products .tree__nodes > li:nth-child(3) .tree-node { left: 44%; top: 72%; }
  .page-products .tree__nodes > li:nth-child(4) .tree-node { left: 60%; top: 40%; }
  .page-products .tree__nodes > li:nth-child(5) .tree-node { left: 76%; top: 65%; }
  .page-products .tree__nodes > li:nth-child(6) .tree-node { left: 90%; top: 35%; }

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

@media (min-width: 1120px) {
  .page-products .cardgrid { gap: 12px; }
  .page-products .metric {
    grid-template-columns: minmax(0, 1fr) minmax(0, 320px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-products .tree-node,
  .page-products .crumbs a {
    transition-duration: .01ms;
  }
  .page-products .tree-node:hover,
  .page-products .tree-node:focus-visible {
    transform: translateY(0);
  }
}
@media (min-width: 940px) and (prefers-reduced-motion: reduce) {
  .page-products .tree-node:hover,
  .page-products .tree-node:focus-visible {
    transform: translate(-50%, -50%);
  }
}