/* ═══════════ 同算智能 comcomAI · 发展布局首页 ═══════════
   体系：暗绿图纸底 / 橙=进行中 / 描边绿=规划 / 虚线灰=愿景 */

:root {
  --bg: #0A1E15;
  --bg-raise: #0D2519;
  --bg-soft: #102C1E;
  --ink: #E9F1EB;
  --muted: #93A89B;
  --faint: #5E7A6C;
  --green: #1E7A52;
  --green-2: #35A471;
  --orange: #F07C1F;
  --orange-soft: #F5A860;
  --line: rgba(53, 132, 94, .30);
  --line-soft: rgba(53, 132, 94, .16);
  --sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --mono: "IBM Plex Mono", "SFMono-Regular", Consolas, "Noto Sans SC", monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  background-color: var(--bg);
  color: var(--ink);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  /* 图纸网格 */
  background-image:
    linear-gradient(rgba(30, 122, 82, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30, 122, 82, .05) 1px, transparent 1px);
  background-size: 48px 48px;
}

.container { max-width: 1180px; margin: 0 auto; padding: 0 32px; }

a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }

[id] { scroll-margin-top: 72px; }

a:focus-visible, button:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ── SVG 内文字 ── */
.svgb-m {
  font-family: var(--mono); font-size: 13px; fill: var(--muted); letter-spacing: .06em;
}
.svgb-t { font-family: var(--sans); font-size: 17px; font-weight: 700; }
.svgb-t.orange { fill: var(--orange-soft); }
.svgb-t.green { fill: var(--green-2); }
.svgb-t.faint { fill: var(--faint); }
.svgb-m.orange { fill: var(--orange-soft); }
.svgb-m.green { fill: var(--green-2); }
.svgb-m.faint { fill: var(--faint); }

/* ── 诚实分级标签 ── */
.chip {
  display: inline-flex; align-items: center;
  font-family: var(--mono); font-size: 11px; letter-spacing: .14em;
  padding: 4px 10px; border-radius: 2px; line-height: 1.5; white-space: nowrap;
}
.chip.lv-solid   { background: rgba(240, 124, 31, .13); border: 1px solid rgba(240, 124, 31, .55); color: var(--orange-soft); }
.chip.lv-outline { border: 1px solid rgba(240, 124, 31, .45); color: var(--orange-soft); }
.chip.lv-dash    { border: 1px dashed var(--green-2); color: var(--green-2); }
.chip.lv-faint   { border: 1px dashed rgba(143, 166, 154, .5); color: var(--muted); }

/* ── 眉标 ── */
.eyebrow {
  font-family: var(--mono); font-size: 12px; letter-spacing: .22em;
  color: var(--green-2); margin-bottom: 20px;
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
}
.eyebrow::before {
  content: ""; display: inline-block; width: 26px; height: 1px; background: var(--green-2);
  flex: none;
}

/* ═══════════ 导航 ═══════════ */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 40;
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
  padding: 0 32px; height: 60px;
  background: rgba(10, 30, 21, .88);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line-soft);
}
.nav-brand { display: flex; align-items: center; gap: 12px; flex: none; }
.nav-logo {
  width: 26px; height: 26px; flex: none;
  border: 2px solid var(--green-2); border-radius: 2px; position: relative;
}
.nav-logo::after {
  content: ""; position: absolute; left: 4px; bottom: 4px;
  width: 8px; height: 8px; background: var(--orange);
}
.nav-word { font-weight: 900; font-size: 17px; letter-spacing: .04em; }
.nav-word em {
  font-style: normal; font-weight: 500; font-size: 12px; color: var(--muted);
  margin-left: 8px; letter-spacing: .2em;
}
.nav-links { display: flex; gap: 26px; font-family: var(--mono); font-size: 12px; letter-spacing: .1em; }
.nav-links a { color: var(--muted); transition: color .2s; padding: 4px 0; }
.nav-links a:hover { color: var(--ink); }
.nav-products { display: flex; align-items: center; gap: 14px; font-family: var(--mono); font-size: 12px; }
.nav-products-label { color: var(--faint); letter-spacing: .2em; padding-right: 2px; }
.nav-products a { color: var(--green-2); transition: color .2s; }
.nav-products a:hover { color: var(--orange-soft); }

/* ═══════════ 首屏 ═══════════ */
.hero {
  min-height: 100vh; display: flex; align-items: center;
  padding: 120px 0 80px;
  background:
    radial-gradient(1000px 500px at 78% 18%, rgba(30, 122, 82, .16), transparent 65%),
    radial-gradient(700px 420px at 12% 88%, rgba(30, 122, 82, .10), transparent 60%);
}
.hero-grid {
  display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  gap: 48px; align-items: center; width: 100%;
}
.hero h1 {
  font-size: clamp(42px, 5.6vw, 84px);
  font-weight: 900; line-height: 1.22; letter-spacing: .01em;
  margin-bottom: 26px;
  text-wrap: balance;
}
.hero-sub {
  font-size: clamp(16px, 1.6vw, 19px); color: var(--muted);
  margin-bottom: 30px; max-width: 34em;
}
.hero-meta {
  font-family: var(--mono); font-size: 12px; letter-spacing: .18em;
  color: var(--faint); margin-bottom: 42px;
}
.hero-cta {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--mono); font-size: 13px; letter-spacing: .18em;
  color: var(--ink); border: 1px solid var(--line);
  padding: 14px 26px; border-radius: 2px;
  transition: border-color .2s, background .2s;
}
.hero-cta:hover { border-color: var(--orange); background: rgba(240, 124, 31, .08); }
.hero-cta .arrow { color: var(--orange); }
.hero-stairs svg { width: 100%; height: auto; display: block; }

/* ═══════════ 分区通用 ═══════════ */
.section { padding: 130px 0; border-top: 1px solid var(--line-soft); }
.sec-head { max-width: 780px; margin-bottom: 64px; }
.sec-head h2 {
  font-size: clamp(30px, 3.6vw, 50px); font-weight: 900;
  line-height: 1.3; margin-bottom: 22px; text-wrap: balance;
}
.h2-sub { font-weight: 700; color: var(--green-2); }
.sec-copy { color: var(--muted); font-size: 16.5px; max-width: 46em; }
.honesty {
  margin-top: 40px;
  font-family: var(--mono); font-size: 12px; letter-spacing: .08em;
  color: var(--faint);
  padding-left: 16px; border-left: 2px solid var(--line);
}

/* ═══════════ 总览 · 三格几何 ═══════════ */
.legend {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px;
  margin-bottom: 56px;
}
.legend-panel {
  background: var(--bg-raise);
  padding: 30px 28px 26px;
  display: flex; flex-direction: column; gap: 6px;
  position: relative;
}
.legend-panel svg { width: 120px; height: 90px; margin-bottom: 10px; }
.legend-geo {
  font-family: var(--mono); font-size: 11px; letter-spacing: .3em; color: var(--faint);
}
.legend-body h3 { font-size: 21px; font-weight: 700; margin-bottom: 6px; }
.legend-body p { color: var(--muted); font-size: 14.5px; line-height: 1.7; margin-bottom: 18px; }
.legend-panel .chip { align-self: flex-start; margin-top: auto; }
.lv-solid-t   { border-top: 3px solid var(--orange); }
.lv-outline-t { border-top: 3px solid var(--green-2); }
.lv-faint-t   { border-top: 3px dashed rgba(143, 166, 154, .5); }

.creed {
  border: 1px solid var(--line);
  background: var(--bg-soft);
  padding: 40px 44px;
  max-width: 860px;
}
.creed p { font-size: clamp(18px, 2vw, 23px); color: var(--muted); line-height: 1.8; }
.creed .creed-strong { color: var(--ink); font-weight: 700; }

/* ═══════════ 第一级 · 产品入口卡 ═══════════ */
.stage-1 { background: radial-gradient(900px 460px at 85% 0%, rgba(240, 124, 31, .06), transparent 62%); }
.pcards {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px;
  align-items: start;
}
.pcard { background: var(--bg-raise); border: 1px solid var(--line); transition: transform .25s, border-color .25s; }
.pcard:nth-child(1) { margin-top: 84px; }
.pcard:nth-child(2) { margin-top: 42px; }
.pcard:nth-child(3) { margin-top: 0; }
.pcard:hover { transform: translateY(-6px); border-color: rgba(53, 164, 113, .6); }
.pcard-fig {
  padding: 22px 24px 12px; border-bottom: 1px dashed var(--line-soft);
}
.pcard-fig svg { width: 100%; height: auto; display: block; }
.fig-tag {
  display: block; font-family: var(--mono); font-size: 11px;
  letter-spacing: .14em; color: var(--faint); margin-top: 6px;
}
.pcard-body { padding: 24px 26px 28px; }
.pcard-body .chip { margin-bottom: 16px; }
.pcard-body h3 { font-size: 20px; font-weight: 700; margin-bottom: 6px; line-height: 1.4; }
.pcard-body > p { color: var(--muted); font-size: 14.5px; margin-bottom: 22px; }
.plink {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--mono); font-size: 13px; letter-spacing: .1em; color: var(--green-2);
  border-bottom: 1px solid transparent; padding-bottom: 2px;
  transition: color .2s, border-color .2s;
}
.plink:hover { color: var(--orange-soft); border-color: rgba(240, 124, 31, .5); }

/* ═══════════ 第二级 · 组装台 ═══════════ */
.stage-2 { background: radial-gradient(900px 500px at 10% 20%, rgba(30, 122, 82, .12), transparent 60%); }
.lab {
  display: grid; grid-template-columns: minmax(0, .95fr) minmax(0, 1.35fr);
  gap: 32px; align-items: stretch;
}
.lab-picker {
  background: var(--bg-raise); border: 1px solid var(--line);
  padding: 30px; display: flex; flex-direction: column; gap: 26px;
}
.pick-group { display: flex; flex-direction: column; gap: 10px; }
.pick-label {
  font-family: var(--mono); font-size: 12px; letter-spacing: .18em;
  color: var(--faint); margin-bottom: 4px;
}
.pick-btn {
  display: flex; align-items: center; gap: 16px; text-align: left;
  background: transparent; border: 1px solid var(--line);
  color: var(--muted); padding: 14px 16px; border-radius: 2px;
  transition: border-color .2s, color .2s, background .2s;
}
.pick-btn svg { width: 44px; height: 28px; flex: none; }
.pick-name { display: flex; flex-direction: column; line-height: 1.4; font-weight: 700; font-size: 15px; color: var(--ink); }
.pick-name small { font-weight: 400; font-size: 12.5px; color: var(--muted); margin-top: 2px; }
.pick-btn:hover { border-color: rgba(53, 164, 113, .6); }
.pick-btn.is-active { border-color: var(--green-2); color: var(--green-2); background: rgba(30, 122, 82, .12); }
.pick-btn.top-reserved { border-style: dashed; color: var(--faint); }
.pick-btn.top-reserved .pick-name { color: var(--muted); }
.pick-btn.top-reserved:hover { border-color: var(--faint); }
.lab-note {
  margin-top: auto;
  font-family: var(--mono); font-size: 12px; line-height: 1.8;
  color: var(--faint); border-left: 2px solid var(--line);
  padding-left: 14px;
  transition: color .3s;
}
.lab-note.flash { color: var(--green-2); }

.lab-stage {
  display: flex; flex-direction: column; gap: 24px;
}
.assembly {
  background: var(--bg-raise); border: 1px solid var(--line);
  padding: 26px 20px 10px;
}
.assembly svg { width: 100%; height: auto; display: block; }
.assembly[data-chassis="tracked"]  .chassis-wheeled { display: none; }
.assembly[data-chassis="wheeled"]  .chassis-tracked { display: none; }
.assembly[data-top="r1"] .top-arm,
.assembly[data-top="r2"] .top-arm { opacity: .16; }
.assembly .top-arm, .assembly .sensor { transition: opacity .35s; }

.config { background: var(--bg-soft); border: 1px solid var(--line); padding: 28px 30px; }
.config-kicker { font-family: var(--mono); font-size: 11px; letter-spacing: .3em; color: var(--faint); margin-bottom: 10px; }
.config-name { font-size: 26px; font-weight: 900; margin-bottom: 18px; transition: color .3s; }
.config.config--reserved .config-name { color: var(--muted); }
.config-list { display: grid; grid-template-columns: 1fr 1fr; gap: 14px 28px; }
.config-list > div { border-top: 1px solid var(--line-soft); padding-top: 10px; }
.config-list dt { font-family: var(--mono); font-size: 11px; letter-spacing: .18em; color: var(--faint); margin-bottom: 4px; }
.config-list dd { font-size: 14.5px; color: var(--ink); line-height: 1.6; }
.config-list > div:last-child { grid-column: 1 / -1; }

/* ═══════════ 第三级 · 远景 ═══════════ */
.stage-3 { position: relative; overflow: hidden; }
.vision {
  position: relative;
  border: 1px dashed rgba(143, 166, 154, .35);
  background: var(--bg-raise);
  min-height: 480px;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}
.vision-grid { position: absolute; inset: 0; }
.vision-grid svg { width: 100%; height: 100%; display: block; }
.vg-dots circle { transition: opacity .8s; }
.vision-silhouettes {
  position: relative; z-index: 1;
  display: flex; gap: clamp(40px, 8vw, 140px);
  padding: 60px 20px;
}
.sil { text-align: center; }
.sil svg { width: clamp(150px, 18vw, 220px); height: auto; display: block; margin: 0 auto 16px; }
.sil figcaption { font-family: var(--mono); font-size: 12px; letter-spacing: .2em; color: var(--muted); }

/* ═══════════ 共同底座 ═══════════ */
.base-diagram { max-width: 980px; margin: 0 auto; }
.base-tops {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
  text-align: center; margin-bottom: 0;
}
.base-top svg { width: 90px; height: 60px; margin-bottom: 10px; }
.base-top p { font-weight: 700; font-size: 15px; color: var(--muted); letter-spacing: .06em; }
.base-top p span { font-family: var(--mono); color: var(--faint); font-size: 12px; margin-left: 6px; }
.base-leads {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
  height: 44px; margin: 4px 0;
}
.base-leads i { display: block; height: 100%; border-left: 1px solid var(--line); margin: 0 auto; width: 1px; }
.base-bars { display: flex; flex-direction: column; gap: 8px; }
.base-bar {
  display: flex; align-items: baseline; gap: 22px;
  background: var(--bg-raise); border: 1px solid var(--line);
  padding: 16px 26px;
}
.base-idx { font-family: var(--mono); font-size: 12px; color: var(--faint); letter-spacing: .1em; flex: none; }
.base-bar strong { font-size: 17px; font-weight: 700; flex: none; min-width: 9em; }
.base-bar p { color: var(--muted); font-size: 14px; }
.base-bar:first-child { border-top: 2px solid var(--green-2); }

/* ═══════════ 收尾 ═══════════ */
.ending { text-align: center; background: radial-gradient(800px 400px at 50% 0%, rgba(30, 122, 82, .12), transparent 65%); }
.ending .sec-head { margin-left: auto; margin-right: auto; }
.ending-stairs { max-width: 460px; margin: 0 auto 56px; }
.ending-stairs svg { width: 100%; height: auto; }
.ending-cta { display: flex; justify-content: center; gap: 16px; margin-bottom: 64px; flex-wrap: wrap; }
.btn-primary, .btn-ghost {
  font-size: 15px; font-weight: 700; letter-spacing: .06em;
  padding: 15px 34px; border-radius: 2px;
  transition: background .2s, border-color .2s, color .2s;
}
.btn-primary { background: var(--orange); color: #14261C; }
.btn-primary:hover { background: var(--orange-soft); }
.btn-ghost { border: 1px solid var(--line); color: var(--muted); }
.btn-ghost:hover { border-color: var(--green-2); color: var(--ink); }
.ending-products {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px;
  text-align: left;
}
.eplink {
  display: flex; align-items: center; gap: 14px;
  background: var(--bg-raise); border: 1px solid var(--line);
  padding: 20px 22px;
  transition: border-color .2s, transform .2s;
}
.eplink:hover { border-color: rgba(240, 124, 31, .55); transform: translateY(-3px); }
.eplink strong { font-size: 15.5px; font-weight: 700; line-height: 1.45; flex: 1; }
.eplink .chip { flex: none; }
.eplink-arrow { color: var(--green-2); font-size: 17px; flex: none; }

/* ═══════════ 页脚 ═══════════ */
.colophon { border-top: 1px solid var(--line-soft); padding: 34px 0; }
.colophon-row {
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  font-family: var(--mono); font-size: 12px; color: var(--faint); letter-spacing: .08em;
}

/* ═══════════ 侧栏进度 ═══════════ */
.rail {
  position: fixed; right: 26px; top: 50%; transform: translateY(-50%);
  z-index: 30; display: flex; flex-direction: column; gap: 22px;
}
.rail a {
  display: flex; align-items: center; gap: 8px;
  font-family: var(--mono); font-size: 11px; letter-spacing: .12em;
  color: var(--faint);
}
.rail i {
  font-style: normal; display: inline-block;
  width: 22px; border-top: 1px solid var(--faint);
  transition: width .25s, border-color .25s;
}
.rail a.is-active { color: var(--ink); }
.rail a.is-active i { width: 40px; border-color: var(--green-2); }
.rail a[data-rail="stage-1"].is-active { color: var(--orange-soft); }
.rail a[data-rail="stage-1"].is-active i { border-color: var(--orange); }
.rail span { opacity: 0; transition: opacity .2s; }
.rail a:hover span, .rail a.is-active span { opacity: 1; }

/* ═══════════ 入场动效 ═══════════ */
.rv { opacity: 0; transform: translateY(26px); transition: opacity .7s ease, transform .7s ease; }
.rv.in { opacity: 1; transform: none; }
.rv[data-delay="1"] { transition-delay: .12s; }
.rv[data-delay="2"] { transition-delay: .24s; }
.rv[data-delay="3"] { transition-delay: .36s; }
.rv[data-delay="4"] { transition-delay: .48s; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .rv { opacity: 1; transform: none; transition: none; }
  .pcard:hover { transform: none; }
}

/* ═══════════ 响应式 ═══════════ */
@media (max-width: 1100px) {
  .rail { display: none; }
  .nav-links { display: none; }
}
@media (max-width: 900px) {
  .hero { padding-top: 100px; }
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero-stairs { max-width: 560px; }
  .legend { grid-template-columns: 1fr; }
  .pcards { grid-template-columns: 1fr; }
  .pcard { margin-top: 0 !important; }
  .lab { grid-template-columns: 1fr; }
  .config-list { grid-template-columns: 1fr; }
  .base-tops { gap: 12px; }
  .base-bar { flex-wrap: wrap; gap: 8px 16px; }
  .base-bar strong { min-width: 0; }
  .ending-products { grid-template-columns: 1fr; }
  .eplink strong { flex: none; }
  .colophon-row { flex-direction: column; gap: 6px; }
  .nav-products-label { display: none; }
}
@media (max-width: 560px) {
  .container { padding: 0 20px; }
  .nav { padding: 0 20px; }
  .nav-word em { display: none; }
  .creed { padding: 28px 24px; }
  .vision { min-height: 420px; }
  .vision-silhouettes { flex-direction: column; gap: 28px; padding: 40px 12px; }
  .lab-picker { padding: 22px; }
}