:root {
  color-scheme: dark;
  --bg: #070a0f;
  --bg-soft: #0d121b;
  --panel: rgba(17, 24, 36, 0.86);
  --line: rgba(151, 164, 190, 0.22);
  --text: #f5f7fb;
  --muted: #9aa5b8;
  --red: #ff3355;
  --cyan: #25d9ff;
  --blue: #4e95ff;
  --orange: #ff9c2f;
  --green: #42d392;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  background:
    radial-gradient(circle at 16% 8%, rgba(255, 51, 85, 0.15), transparent 28rem),
    radial-gradient(circle at 82% 16%, rgba(37, 217, 255, 0.12), transparent 30rem),
    var(--bg);
  color: var(--text);
}

.progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 20;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--red), var(--cyan));
}

.nav {
  position: sticky;
  top: 0;
  z-index: 15;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px 5vw;
  background: rgba(7, 10, 15, 0.72);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
}

.brand-logo {
  width: 92px;
  height: 32px;
  object-fit: contain;
  filter: brightness(1.08);
}

.brand-mark {
  width: 13px;
  height: 28px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--red), var(--orange));
  box-shadow: 0 0 26px rgba(255, 51, 85, 0.7);
}

.nav-links {
  display: flex;
  gap: 18px;
  font-size: 14px;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
}

.nav a:hover { color: var(--text); }

.hero {
  position: relative;
  min-height: calc(100vh - 62px);
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) 440px;
  gap: 42px;
  align-items: center;
  padding: 7vh 5vw 9vh;
  overflow: hidden;
}

#waferCanvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.7;
}

.hero-copy,
.hero-panel,
.section {
  position: relative;
  z-index: 1;
}

.eyebrow,
.section-kicker {
  margin: 0 0 14px;
  color: var(--cyan);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1, h2, h3, p { margin-top: 0; }
h1 {
  max-width: 960px;
  margin-bottom: 22px;
  font-size: clamp(54px, 8vw, 118px);
  line-height: 0.96;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 14px;
  font-size: clamp(32px, 4vw, 58px);
  line-height: 1.08;
}

h3 { line-height: 1.25; }
.subtitle,
.lead,
.section-head p {
  color: #c5cedd;
  font-size: 18px;
  line-height: 1.8;
}

.subtitle { max-width: 780px; }
.hero-actions {
  display: flex;
  gap: 14px;
  margin-top: 34px;
  flex-wrap: wrap;
}

.primary-btn,
.ghost-btn {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 22px;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 800;
}

.primary-btn {
  color: white;
  background: linear-gradient(135deg, var(--red), #c725ff);
}

.ghost-btn {
  color: var(--text);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
}

.hero-panel {
  display: grid;
  gap: 18px;
}

.signal-card,
.pain-board,
.role,
.theme-summary,
.case-card,
.factory-map,
.compare-col,
.calculator,
.step {
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.signal-card {
  padding: 28px;
  border-radius: 8px;
}

.signal-card span {
  display: block;
  margin-bottom: 12px;
  color: var(--red);
  font-weight: 900;
}

.signal-card strong {
  display: block;
  font-size: 24px;
  line-height: 1.55;
}

.metric-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.metric-strip div {
  min-height: 116px;
  padding: 18px 14px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.055);
  border: 1px solid var(--line);
}

.metric-strip b {
  display: block;
  color: var(--cyan);
  font-size: 34px;
}

.metric-strip span {
  display: block;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.45;
}

.section {
  padding: 94px 5vw;
}

.part-one {
  background:
    radial-gradient(circle at 78% 10%, rgba(255, 51, 85, 0.16), transparent 32rem),
    linear-gradient(180deg, rgba(255, 255, 255, 0.01), rgba(255, 255, 255, 0.03));
}

.old-work-grid {
  display: grid;
  grid-template-columns: minmax(240px, 0.34fr) minmax(0, 0.66fr);
  gap: 34px;
  align-items: stretch;
  margin-bottom: 42px;
}

.old-work-stat {
  min-height: 470px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 32px;
  border-left: 5px solid var(--red);
  background: rgba(255, 255, 255, 0.02);
}

.old-work-stat strong {
  display: block;
  color: var(--red);
  font-size: clamp(68px, 7vw, 92px);
  line-height: 0.95;
  letter-spacing: 0;
}

.old-work-stat > span {
  display: block;
  margin-top: 16px;
  color: white;
  font-size: 22px;
  font-weight: 900;
}

.stat-line {
  width: 104px;
  height: 4px;
  margin: 24px 0 34px;
  background: var(--red);
}

.old-work-stat ul {
  display: grid;
  gap: 28px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.old-work-stat li {
  display: grid;
  grid-template-columns: 42px 1fr;
  column-gap: 14px;
  align-items: center;
}

.old-work-stat li b,
.old-work-stat li small {
  grid-column: 2;
}

.old-work-stat li b {
  color: white;
  font-size: 18px;
}

.old-work-stat li small {
  color: var(--muted);
  font-size: 14px;
}

.old-work-card {
  position: relative;
  min-height: 470px;
  display: grid;
  align-content: center;
  gap: 26px;
  padding: 34px 28px 0;
  border: 2px solid rgba(255, 51, 85, 0.72);
  border-radius: 18px;
  background:
    radial-gradient(circle at 50% 20%, rgba(255, 51, 85, 0.14), transparent 30rem),
    rgba(22, 9, 13, 0.74);
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.36);
  overflow: hidden;
}

.quote-mark {
  position: absolute;
  left: 40px;
  top: 26px;
  color: rgba(255, 51, 85, 0.72);
  font-size: 72px;
  font-weight: 900;
}

.old-work-card h3 {
  max-width: 850px;
  margin: 0 auto;
  font-size: clamp(20px, 2.1vw, 34px);
  line-height: 1.35;
  text-align: center;
}

.old-work-card h3 strong,
.red-conclusion {
  color: white;
}

.wrong-allocation {
  width: min(690px, 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 90px 1fr;
  align-items: center;
  padding: 22px 20px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.94);
  color: #1b1d25;
}

.worker-bot,
.worker-human {
  display: grid;
  justify-items: center;
  gap: 8px;
  text-align: center;
}

.worker-bot strong,
.worker-human strong {
  font-size: 18px;
}

.worker-bot small,
.worker-human small {
  color: #697083;
  font-size: 13px;
}

.bot-face {
  width: 78px;
  height: 58px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  border-radius: 24px;
  background: linear-gradient(180deg, #f9fbff, #cfd8e8);
  border: 4px solid #6b7890;
  box-shadow: 0 0 0 18px rgba(255, 51, 85, 0.08);
}

.bot-face span {
  width: 10px;
  height: 18px;
  border-radius: 999px;
  background: var(--cyan);
  box-shadow: 0 0 10px rgba(37, 217, 255, 0.9);
  animation: blink 3s infinite;
}

@keyframes blink {
  0%, 88%, 100% { transform: scaleY(1); }
  92% { transform: scaleY(0.2); }
}

.human-head {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: #ff7f94;
}

.human-body {
  width: 92px;
  height: 58px;
  margin-top: -6px;
  border-radius: 14px 14px 4px 4px;
  background: #ff7f94;
  clip-path: polygon(18% 0, 82% 0, 100% 100%, 0 100%);
}

.broken-line {
  position: relative;
  height: 2px;
  background: repeating-linear-gradient(90deg, rgba(255, 51, 85, 0.9) 0 10px, transparent 10px 20px);
}

.broken-line span {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 58px;
  height: 58px;
  transform: translate(-50%, -50%);
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: white;
  background: var(--red);
  font-size: 34px;
  font-weight: 900;
  animation: pulseRed 2.4s infinite;
}

@keyframes pulseRed {
  0%, 100% { box-shadow: 0 0 0 0 rgba(255, 51, 85, 0.4); }
  50% { box-shadow: 0 0 0 18px rgba(255, 51, 85, 0); }
}

.red-conclusion {
  margin: 0 -28px;
  padding: 26px 40px;
  background: var(--red);
  font-size: clamp(18px, 1.7vw, 28px);
  line-height: 1.35;
  font-weight: 900;
  text-align: center;
}

.industry-pain {
  display: grid;
  grid-template-columns: minmax(280px, 0.7fr) minmax(320px, 0.82fr) minmax(360px, 0.9fr);
  gap: 22px;
  align-items: stretch;
}

.industry-pain > div:first-child {
  padding: 24px;
}

.industry-pain h3 {
  font-size: clamp(26px, 3vw, 42px);
}

.manufacturing-motion {
  position: relative;
  min-height: 350px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background:
    linear-gradient(rgba(37, 217, 255, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(37, 217, 255, 0.08) 1px, transparent 1px),
    rgba(12, 17, 26, 0.72);
  background-size: 34px 34px;
  overflow: hidden;
}

.system-node {
  position: absolute;
  min-width: 70px;
  height: 42px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(37, 217, 255, 0.34);
  border-radius: 8px;
  background: rgba(7, 10, 15, 0.86);
  color: white;
  font-weight: 900;
  box-shadow: 0 0 24px rgba(37, 217, 255, 0.08);
}

.erp { left: 28px; top: 34px; }
.mes { right: 32px; top: 54px; }
.qms { left: 46px; bottom: 46px; }
.wms { right: 44px; bottom: 44px; }
.eam { left: 50%; top: 26px; transform: translateX(-50%); }

.flow-track {
  position: absolute;
  left: 70px;
  right: 70px;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(37, 217, 255, 0.72), transparent);
}

.track-one { top: 102px; transform: rotate(15deg); }
.track-two { top: 182px; transform: rotate(-12deg); }
.track-three { bottom: 98px; transform: rotate(8deg); }

.moving-packet {
  position: absolute;
  width: 14px;
  height: 14px;
  border-radius: 4px;
  background: var(--cyan);
  box-shadow: 0 0 18px rgba(37, 217, 255, 0.9);
  animation: packetMove 4.2s linear infinite;
}

.packet-one { left: 76px; top: 94px; }
.packet-two { left: 130px; top: 176px; animation-delay: -1.5s; background: var(--red); box-shadow: 0 0 18px rgba(255, 51, 85, 0.82); }
.packet-three { left: 200px; bottom: 92px; animation-delay: -2.7s; background: var(--green); box-shadow: 0 0 18px rgba(66, 211, 146, 0.82); }

@keyframes packetMove {
  0% { transform: translateX(0) scale(0.85); opacity: 0.4; }
  15% { opacity: 1; }
  100% { transform: translateX(260px) scale(1.15); opacity: 0.2; }
}

.motion-center {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 170px;
  height: 170px;
  transform: translate(-50%, -50%);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  padding: 18px;
  border-radius: 50%;
  border: 1px solid rgba(255, 51, 85, 0.45);
  background: rgba(7, 10, 15, 0.88);
  box-shadow: inset 0 0 36px rgba(255, 51, 85, 0.1);
}

.motion-center span {
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: #dbe5f3;
  background: rgba(255, 255, 255, 0.055);
  font-size: 13px;
  font-weight: 900;
}

.intro-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(360px, 0.7fr);
  gap: 46px;
  align-items: start;
}

.pain-board {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  padding: 20px;
  border-radius: 8px;
}

.pain {
  min-height: 54px;
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--text);
  background: rgba(255, 255, 255, 0.04);
  font-weight: 800;
  cursor: pointer;
}

.pain.active {
  border-color: rgba(37, 217, 255, 0.7);
  background: rgba(37, 217, 255, 0.12);
}

.pain-detail {
  grid-column: 1 / -1;
  min-height: 190px;
  padding: 22px;
  border-radius: 6px;
  background: rgba(0, 0, 0, 0.24);
}

.pain-detail p,
.role p,
.theme-summary p,
.case-card p,
.step p,
.calc-result p {
  color: var(--muted);
  line-height: 1.7;
}

.dark-band {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.03), rgba(255, 255, 255, 0)),
    rgba(5, 8, 13, 0.76);
  border-block: 1px solid var(--line);
}

.definition-section {
  background:
    radial-gradient(circle at 50% 0%, rgba(37, 217, 255, 0.12), transparent 34rem),
    rgba(255, 255, 255, 0.015);
}

.ai-gap {
  margin-bottom: 72px;
}

.ai-gap-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 28px;
  border-left: 5px solid var(--red);
  padding-left: 20px;
}

.ai-gap-head h2 {
  margin-bottom: 0;
}

.ai-gap-grid {
  display: grid;
  grid-template-columns: minmax(300px, 0.74fr) minmax(420px, 1fr);
  gap: 28px;
  align-items: stretch;
}

.productivity-card,
.factory-redesign,
.assistant-box,
.enterprise-need,
.working-ai-video {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.productivity-card {
  min-height: 420px;
  display: grid;
  align-content: center;
  padding: 34px;
  background:
    radial-gradient(circle at 82% 18%, rgba(255, 51, 85, 0.18), transparent 18rem),
    rgba(14, 18, 27, 0.86);
}

.history-label {
  color: #c6cfdd;
  font-weight: 900;
}

.productivity-card strong {
  display: block;
  margin: 10px 0 14px;
  color: var(--red);
  font-size: clamp(82px, 9vw, 132px);
  line-height: 0.92;
}

.productivity-card p,
.factory-redesign p,
.video-copy p {
  color: var(--muted);
  line-height: 1.75;
}

.gap-question {
  margin-top: 28px;
  color: white;
  font-size: clamp(24px, 3vw, 42px);
  line-height: 1.2;
  font-weight: 900;
}

.factory-redesign {
  min-height: 420px;
  display: grid;
  align-content: center;
  gap: 18px;
  padding: 30px;
  background:
    linear-gradient(135deg, rgba(255, 51, 85, 0.08), rgba(37, 217, 255, 0.06)),
    rgba(13, 17, 25, 0.9);
}

.factory-paper {
  width: min(530px, 100%);
  min-height: 260px;
  margin: 0 auto;
  padding: 22px 26px;
  border-radius: 4px;
  background: #f4efe5;
  color: #20242c;
  box-shadow: 0 26px 70px rgba(0, 0, 0, 0.32);
  transform: rotate(0.6deg);
}

.paper-title {
  margin-bottom: 18px;
  font-family: Georgia, serif;
  font-size: 22px;
  font-weight: 700;
  text-align: center;
}

.paper-lines,
.paper-lines::before,
.paper-lines::after {
  display: block;
  height: 7px;
  border-radius: 99px;
  background: rgba(42, 46, 55, 0.24);
}

.paper-lines {
  position: relative;
  margin-bottom: 28px;
}

.paper-lines::before,
.paper-lines::after {
  content: "";
  position: absolute;
  left: 0;
}

.paper-lines::before {
  top: 16px;
  width: 88%;
}

.paper-lines::after {
  top: 32px;
  width: 64%;
}

.paper-lines.short {
  width: 78%;
  margin-top: 22px;
}

.factory-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 56px;
}

.factory-row span {
  height: 82px;
  border: 2px solid rgba(42, 46, 55, 0.32);
  border-top: 0;
  background:
    repeating-linear-gradient(90deg, transparent 0 17px, rgba(42, 46, 55, 0.22) 17px 19px),
    linear-gradient(180deg, transparent 48%, rgba(42, 46, 55, 0.16) 48% 52%, transparent 52%);
  animation: factoryShift 4.6s ease-in-out infinite;
}

.factory-row span:nth-child(2) { animation-delay: -1s; }
.factory-row span:nth-child(3) { animation-delay: -2s; }

@keyframes factoryShift {
  0%, 100% { transform: translateY(0); opacity: 0.72; }
  50% { transform: translateY(-8px); opacity: 1; }
}

.factory-timeline {
  display: grid;
  grid-template-columns: auto 1fr auto 1fr auto;
  align-items: center;
  gap: 12px;
  color: #8fa1bb;
  font-weight: 900;
}

.factory-timeline i {
  height: 2px;
  background: linear-gradient(90deg, rgba(37, 217, 255, 0.65), rgba(255, 51, 85, 0.42));
}

.ai-not-working {
  display: grid;
  grid-template-columns: minmax(320px, 0.82fr) minmax(420px, 1fr);
  gap: 28px;
  margin-top: 28px;
}

.assistant-box,
.enterprise-need {
  min-height: 300px;
  padding: 28px;
}

.assistant-actions {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin: 24px 0 34px;
}

.assistant-actions span,
.need-list span {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 56px;
  padding: 12px 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.045);
  font-weight: 900;
}

.assistant-box ul {
  display: grid;
  gap: 12px;
  padding: 0;
  margin: 0;
  list-style: none;
  color: white;
  font-size: 18px;
  font-weight: 900;
}

.assistant-box li::before {
  content: "";
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-right: 12px;
  border-radius: 50%;
  background: var(--red);
  box-shadow: 0 0 12px rgba(255, 51, 85, 0.9);
}

.enterprise-need {
  background:
    linear-gradient(135deg, rgba(255, 51, 85, 0.52), rgba(255, 51, 85, 0.08)),
    rgba(16, 18, 25, 0.9);
}

.need-list {
  display: grid;
  gap: 14px;
}

.need-list span {
  min-height: 64px;
  border-color: rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.11);
  font-size: 20px;
}

.gap-conclusion {
  margin-top: 18px;
  padding: 22px;
  border-radius: 999px;
  background: linear-gradient(90deg, transparent, rgba(255, 51, 85, 0.24), transparent);
  color: #d4dbe8;
  text-align: center;
  font-size: clamp(24px, 3vw, 40px);
  font-weight: 300;
}

.gap-conclusion strong,
.gap-conclusion b {
  color: var(--red);
}

.definition-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.definition-card {
  position: relative;
  min-height: 250px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.definition-card .card-index {
  display: inline-flex;
  margin-bottom: 24px;
  color: var(--cyan);
  font-weight: 900;
  font-size: 14px;
}

.definition-card h3 {
  font-size: 25px;
}

.definition-card p {
  color: var(--muted);
  line-height: 1.75;
}

.definition-card.accent {
  border-color: rgba(255, 51, 85, 0.55);
  background: linear-gradient(145deg, rgba(255, 51, 85, 0.14), rgba(37, 217, 255, 0.08)), var(--panel);
}

.visual-icon {
  --icon-color: var(--cyan);
  width: 34px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(37, 217, 255, 0.38);
  border-radius: 8px;
  background: rgba(37, 217, 255, 0.09);
  color: var(--icon-color);
  font-style: normal;
  font-size: 14px;
  font-weight: 900;
  flex: 0 0 auto;
}

.definition-card > .visual-icon {
  position: absolute;
  right: 24px;
  top: 24px;
}

.visual-icon::before { content: ""; }
.chat-icon::before { content: "Q"; }
.shield-icon::before { content: "✓"; }
.workflow-icon::before { content: "↻"; }
.checklist-icon::before { content: "☷"; }
.target-icon::before { content: "◎"; }
.brain-icon::before { content: "AI"; font-size: 12px; }
.gear-icon::before { content: "⚙"; }
.chart-icon::before { content: "↗"; }
.calendar-icon::before { content: "日"; font-size: 12px; }
.alert-icon::before { content: "!"; }
.factory-icon::before { content: "厂"; font-size: 12px; }
.calculator-icon::before { content: "∑"; }
.price-icon::before { content: "¥"; }
.package-icon::before { content: "□"; }
.finance-icon::before { content: "账"; font-size: 12px; }
.certificate-icon::before { content: "证"; font-size: 12px; }
.chip-icon::before { content: "芯"; font-size: 12px; }
.bom-icon::before { content: "B"; }
.network-icon::before { content: "网"; font-size: 12px; }
.layers-icon::before { content: "层"; font-size: 12px; }
.team-icon::before { content: "众"; font-size: 12px; }
.write-icon::before { content: "写"; font-size: 12px; }
.palette-icon::before { content: "色"; font-size: 12px; }
.idea-icon::before { content: "灯"; font-size: 12px; }
.robot-icon::before { content: "机"; font-size: 12px; }

.ai-job-flow {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 42px 1fr 42px 1fr 42px 1fr;
  gap: 0;
  align-items: center;
  margin-top: 26px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: linear-gradient(135deg, rgba(37, 217, 255, 0.07), rgba(255, 51, 85, 0.06));
  overflow: hidden;
}

.working-ai-video {
  display: grid;
  grid-template-columns: minmax(280px, 0.54fr) minmax(440px, 1fr);
  gap: 24px;
  align-items: center;
  margin-top: 28px;
  padding: 24px;
  background:
    radial-gradient(circle at 80% 20%, rgba(255, 51, 85, 0.18), transparent 24rem),
    var(--panel);
}

.video-copy h3 {
  font-size: clamp(28px, 3vw, 42px);
}

.inline-video-shell {
  position: relative;
  border: 1px solid rgba(37, 217, 255, 0.28);
  border-radius: 8px;
  overflow: hidden;
  background: #05070b;
  box-shadow: 0 22px 70px rgba(0, 0, 0, 0.42);
}

.inline-video-shell::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.05);
  z-index: 1;
}

.inline-video-shell video {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: contain;
}

.ai-job-flow::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(37, 217, 255, 0.12), transparent);
  transform: translateX(-100%);
  animation: sweep 4.8s linear infinite;
}

.flow-node {
  position: relative;
  z-index: 1;
  min-height: 146px;
  display: grid;
  justify-items: center;
  align-content: center;
  gap: 10px;
  padding: 18px;
  border: 1px solid rgba(151, 164, 190, 0.18);
  border-radius: 8px;
  background: rgba(7, 10, 15, 0.72);
  text-align: center;
}

.flow-node strong {
  font-size: 18px;
}

.flow-node span {
  color: var(--muted);
  font-size: 13px;
}

.flow-arrow {
  position: relative;
  height: 2px;
  background: rgba(37, 217, 255, 0.5);
}

.flow-arrow::after {
  content: "";
  position: absolute;
  right: -1px;
  top: -5px;
  border-left: 9px solid rgba(37, 217, 255, 0.8);
  border-top: 6px solid transparent;
  border-bottom: 6px solid transparent;
}

@keyframes sweep {
  to { transform: translateX(100%); }
}

.section-head {
  max-width: 980px;
  margin-bottom: 34px;
}

.division {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.role {
  min-height: 264px;
  padding: 26px;
  border-radius: 8px;
}

.role span {
  display: inline-flex;
  align-items: center;
  height: 32px;
  padding: 0 12px;
  border-radius: 999px;
  font-weight: 900;
  margin-bottom: 20px;
}

.human span { background: rgba(255, 156, 47, 0.18); color: var(--orange); }
.ai span { background: rgba(37, 217, 255, 0.16); color: var(--cyan); }
.rpa span { background: rgba(66, 211, 146, 0.16); color: var(--green); }

.callout {
  margin-top: 20px;
  padding: 20px 24px;
  border-radius: 8px;
  border: 1px solid rgba(255, 51, 85, 0.45);
  background: rgba(255, 51, 85, 0.1);
  color: #e7edf8;
  line-height: 1.75;
}

.theme-tabs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin-bottom: 20px;
}

.theme-tab {
  min-height: 58px;
  border-radius: 6px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
  color: var(--muted);
  font-size: 16px;
  font-weight: 900;
  cursor: pointer;
}

.theme-tab.active {
  color: white;
  border-color: rgba(255, 51, 85, 0.65);
  background: linear-gradient(135deg, rgba(255, 51, 85, 0.22), rgba(37, 217, 255, 0.12));
}

.theme-stage {
  display: grid;
  grid-template-columns: 360px minmax(0, 1fr);
  gap: 20px;
  align-items: stretch;
}

.theme-summary {
  border-radius: 8px;
  padding: 24px;
}

.theme-summary .tag {
  display: inline-flex;
  margin-bottom: 18px;
  color: var(--cyan);
  font-size: 13px;
  font-weight: 900;
}

.theme-summary ul {
  padding-left: 18px;
  color: #c7d1df;
  line-height: 1.75;
}

.case-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.case-card {
  position: relative;
  min-height: 320px;
  display: flex;
  flex-direction: column;
  padding: 22px;
  border-radius: 8px;
  overflow: hidden;
}

.case-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 4px;
  background: linear-gradient(90deg, var(--red), var(--cyan));
}

.case-meta {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
  color: var(--muted);
  font-size: 13px;
}

.case-meta span:first-child {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.case-meta .visual-icon {
  width: 28px;
  height: 28px;
  border-radius: 7px;
  font-size: 12px;
}

.case-card h3 {
  margin-bottom: 12px;
  font-size: 22px;
}

.case-card .value {
  margin-top: auto;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.value div {
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.04);
}

.value b {
  display: block;
  color: var(--cyan);
  font-size: 21px;
}

.value span {
  color: var(--muted);
  font-size: 12px;
}

.video-btn {
  margin-top: 16px;
  min-height: 42px;
  border: 0;
  border-radius: 6px;
  color: white;
  background: rgba(255, 51, 85, 0.86);
  font-weight: 900;
  cursor: pointer;
}

.map-section { padding-top: 42px; }
.factory-map {
  position: relative;
  padding: 28px;
  border-radius: 8px;
  overflow: hidden;
}

.map-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 92px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.045);
  text-align: center;
  font-weight: 900;
}

.map-node small {
  margin-top: 6px;
  color: var(--muted);
  font-weight: 500;
}

.map-node.top {
  width: min(620px, 100%);
  margin: 0 auto 26px;
  color: white;
  background: rgba(255, 51, 85, 0.12);
}

.map-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.automation-line {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 18px;
  margin: 30px 0;
  color: var(--cyan);
}

.factory-animation {
  position: relative;
  width: min(420px, 100%);
  height: 220px;
  margin: 0 auto 30px;
}

.orbit {
  position: absolute;
  inset: 18px;
  border: 1px solid rgba(37, 217, 255, 0.28);
  border-radius: 50%;
}

.orbit-two {
  inset: 54px 70px;
  border-color: rgba(255, 51, 85, 0.24);
  transform: rotate(-16deg);
}

.pulse-dot {
  position: absolute;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 18px rgba(37, 217, 255, 0.9);
  animation: orbitMove 5.6s linear infinite;
}

.dot-a { left: 42px; top: 96px; }
.dot-b { right: 72px; top: 54px; animation-delay: -1.8s; background: var(--red); box-shadow: 0 0 18px rgba(255, 51, 85, 0.9); }
.dot-c { left: 52%; bottom: 26px; animation-delay: -3.2s; background: var(--green); box-shadow: 0 0 18px rgba(66, 211, 146, 0.8); }

@keyframes orbitMove {
  0%, 100% { transform: translate(0, 0) scale(1); opacity: 0.9; }
  25% { transform: translate(60px, -24px) scale(1.25); opacity: 1; }
  50% { transform: translate(126px, 22px) scale(0.85); opacity: 0.62; }
  75% { transform: translate(40px, 58px) scale(1.08); opacity: 1; }
}

.core-chip {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 210px;
  min-height: 86px;
  transform: translate(-50%, -50%);
  display: grid;
  justify-items: center;
  align-content: center;
  gap: 10px;
  border: 1px solid rgba(37, 217, 255, 0.4);
  border-radius: 8px;
  background: rgba(10, 16, 25, 0.92);
  box-shadow: 0 18px 60px rgba(0, 0, 0, 0.38), inset 0 0 32px rgba(37, 217, 255, 0.09);
}

.core-chip img {
  width: 92px;
  height: 32px;
}

.core-chip span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

.automation-line span {
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(37, 217, 255, 0.8), transparent);
}

.ai-compare-image {
  padding: 12px;
  border: 1px solid rgba(151, 164, 190, 0.18);
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.26);
  box-shadow: var(--shadow);
}

.ai-compare-image img {
  display: block;
  width: 100%;
  border-radius: 6px;
}

.active-action-note {
  display: grid;
  grid-template-columns: auto 180px minmax(0, 1fr);
  gap: 18px;
  align-items: center;
  margin-top: 18px;
  padding: 18px 22px;
  border: 1px solid rgba(78, 149, 255, 0.32);
  border-radius: 8px;
  background: linear-gradient(90deg, rgba(78, 149, 255, 0.12), rgba(255, 51, 85, 0.08));
}

.active-action-note span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 900;
}

.active-action-note strong {
  color: var(--blue);
  font-size: 28px;
}

.active-action-note p {
  margin: 0;
  color: #c6d1e2;
  line-height: 1.65;
}

.calculator {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 24px;
  padding: 28px;
  border-radius: 8px;
}

.proof-section {
  padding-top: 58px;
}

.participation-flow {
  position: relative;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 18px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.9), rgba(244, 249, 255, 0.94));
  color: #111827;
  box-shadow: var(--shadow);
}

.participation-step {
  position: relative;
  min-height: 300px;
  display: grid;
  align-content: start;
  gap: 12px;
  padding: 24px 18px;
  border: 1px solid rgba(20, 86, 220, 0.14);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.72);
}

.participation-step:not(:last-child)::after {
  content: "";
  position: absolute;
  right: -22px;
  top: 50%;
  width: 28px;
  height: 18px;
  transform: translateY(-50%);
  background: linear-gradient(90deg, #3185ff, #14d5ff);
  clip-path: polygon(0 30%, 62% 30%, 62% 0, 100% 50%, 62% 100%, 62% 70%, 0 70%);
  z-index: 2;
}

.participation-step b {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: #1264ff;
  color: white;
  font-size: 22px;
}

.participation-step h3 {
  margin-bottom: 0;
  color: #005dff;
  font-size: 24px;
}

.participation-step p {
  margin: 0;
  color: #4b5563;
  line-height: 1.65;
  font-weight: 700;
}

.participation-value {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: 20px;
  align-items: center;
  margin-top: 16px;
  padding: 18px 24px;
  border: 1px solid rgba(37, 217, 255, 0.2);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.06);
}

.participation-value span {
  color: var(--cyan);
  font-weight: 900;
}

.participation-value strong {
  color: white;
  font-size: 20px;
  line-height: 1.55;
}

.zhenghe-case {
  margin-top: 76px;
}

.zhenghe-head {
  margin-bottom: 28px;
}

.zhenghe-stage {
  display: grid;
  grid-template-columns: minmax(320px, 0.85fr) minmax(420px, 1fr);
  gap: 22px;
  align-items: stretch;
}

.zhenghe-context,
.zhenghe-insight,
.mechanism-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.zhenghe-context {
  padding: 28px;
}

.zhenghe-context > span {
  display: block;
  margin-bottom: 18px;
  color: var(--red);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.28em;
}

.zhenghe-context h3 {
  font-size: 34px;
}

.zhenghe-context p,
.zhenghe-insight li,
.mechanism-card p,
.mechanism-card small {
  color: var(--muted);
  line-height: 1.7;
}

.zhenghe-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 28px;
}

.zhenghe-metrics div {
  min-height: 118px;
  padding: 18px;
  border: 1px solid rgba(151, 164, 190, 0.18);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.04);
}

.zhenghe-metrics b {
  display: block;
  color: white;
  font-size: 42px;
  line-height: 1;
}

.zhenghe-metrics small {
  display: block;
  margin-top: 12px;
  color: var(--red);
  font-weight: 900;
}

.zhenghe-insight {
  padding: 28px;
  background:
    radial-gradient(circle at 20% 0%, rgba(255, 51, 85, 0.22), transparent 22rem),
    rgba(20, 12, 18, 0.88);
}

.zhenghe-insight h3 {
  margin-bottom: 26px;
  font-size: 34px;
}

.zhenghe-insight ul {
  display: grid;
  gap: 18px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.zhenghe-insight li {
  padding: 18px 20px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.055);
  color: #edf2fa;
  font-size: 19px;
  font-weight: 900;
}

.zhenghe-insight li::before {
  content: "";
  display: inline-block;
  width: 9px;
  height: 9px;
  margin-right: 14px;
  border-radius: 50%;
  background: var(--red);
  box-shadow: 0 0 14px rgba(255, 51, 85, 0.9);
}

.mechanism-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  margin-top: 24px;
}

.mechanism-card {
  min-height: 360px;
  display: grid;
  align-content: start;
  gap: 18px;
  padding: 26px;
  border-top: 3px solid var(--red);
}

.mechanism-card span {
  color: var(--red);
  font-size: 22px;
  font-weight: 900;
  letter-spacing: 0.12em;
}

.mechanism-card h3 {
  font-size: 30px;
}

.mechanism-card p {
  margin-bottom: 0;
  color: #c9d2df;
  font-size: 18px;
  font-weight: 900;
}

.mechanism-card p b {
  display: block;
  margin-bottom: 8px;
  color: var(--red);
  font-size: 13px;
  letter-spacing: 0.18em;
}

.mechanism-card small {
  margin-top: auto;
  padding-top: 18px;
  border-top: 1px dashed rgba(151, 164, 190, 0.18);
  color: white;
  font-size: 16px;
  font-weight: 900;
}

.sliders {
  display: grid;
  gap: 24px;
}

label {
  display: grid;
  gap: 12px;
  color: #d9e1ee;
  font-weight: 800;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--cyan);
}

.calc-result {
  display: grid;
  gap: 12px;
}

.calc-result div {
  padding: 18px;
  border-radius: 8px;
  background: rgba(37, 217, 255, 0.1);
  border: 1px solid rgba(37, 217, 255, 0.28);
}

.calc-result b {
  display: block;
  color: var(--cyan);
  font-size: 38px;
}

.calc-result span { color: var(--muted); }

.timeline {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.step {
  min-height: 250px;
  padding: 24px;
  border-radius: 8px;
}

.step span {
  display: inline-flex;
  margin-bottom: 18px;
  color: var(--cyan);
  font-weight: 900;
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 28px;
  background: rgba(0, 0, 0, 0.72);
}

.modal.show { display: flex; }
.modal-card {
  position: relative;
  width: min(1080px, 96vw);
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #0b111b;
}

.modal video {
  width: 100%;
  max-height: 72vh;
  background: black;
  border-radius: 6px;
}

.close {
  position: absolute;
  right: 12px;
  top: 10px;
  z-index: 2;
  width: 36px;
  height: 36px;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.65);
  color: white;
  font-size: 24px;
  cursor: pointer;
}

@media (max-width: 1040px) {
  .hero,
  .intro-grid,
  .theme-stage,
  .industry-pain,
  .calculator,
  .ai-gap-grid,
  .ai-not-working,
  .working-ai-video {
    grid-template-columns: 1fr;
  }
  .theme-summary { min-height: auto; }
  .division,
  .timeline,
  .map-row,
  .ai-job-flow,
  .participation-flow,
  .zhenghe-stage,
  .mechanism-grid {
    grid-template-columns: 1fr;
  }
  .flow-arrow {
    width: 2px;
    height: 34px;
    margin: 0 auto;
  }
  .flow-arrow::after {
    right: -5px;
    top: auto;
    bottom: -1px;
    border-top: 9px solid rgba(37, 217, 255, 0.8);
    border-left: 6px solid transparent;
    border-right: 6px solid transparent;
    border-bottom: 0;
  }
  .active-action-note,
  .participation-value {
    grid-template-columns: 1fr;
  }
  .participation-step {
    min-height: auto;
  }
  .participation-step:not(:last-child)::after {
    right: auto;
    left: 50%;
    top: auto;
    bottom: -25px;
    transform: translateX(-50%) rotate(90deg);
  }
}

@media (max-width: 760px) {
  .nav { align-items: flex-start; flex-direction: column; }
  .nav-links { flex-wrap: wrap; }
  .hero { padding-top: 54px; }
  h1 { font-size: 52px; }
  .metric-strip,
  .definition-grid,
  .theme-tabs,
  .case-grid {
    grid-template-columns: 1fr;
  }
  .section { padding: 70px 22px; }
  .old-work-grid { grid-template-columns: 1fr; }
  .old-work-card { padding: 30px 20px 0; }
  .red-conclusion { margin: 0 -20px; }
  .wrong-allocation { grid-template-columns: 1fr; gap: 22px; }
  .broken-line { width: 80%; margin: 0 auto; }
  .ai-gap-head { align-items: flex-start; flex-direction: column; }
  .assistant-actions { grid-template-columns: 1fr; }
  .need-list span { font-size: 18px; }
  .factory-timeline { grid-template-columns: 1fr; }
  .factory-timeline i { min-height: 2px; }
}