:root {
  --page-bg: #e3e3ff;
  --surface: rgba(255, 255, 255, 0.72);
  --surface-medium: rgba(255, 255, 255, 0.82);
  --surface-strong: rgba(255, 255, 255, 0.92);
  --text: #1a154a;
  --muted: #8384a6;
  --soft: #a3a4c4;
  --line: #d8dcf5;
  --glass-line: rgba(255, 255, 255, 0.86);
  --primary: #607bff;
  --primary-deep: #816fff;
  --primary-bright: #607bff;
  --pink: #f25aa8;
  --cyan: #60a5ff;
  --shadow: 0 18px 42px rgba(129, 111, 255, 0.05);
  --soft-shadow: 0 8px 20px -6px rgba(129, 111, 255, 0.05), 0 2px 8px -3px rgba(129, 111, 255, 0.04);
  --radius-xl: 30px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --max: 1280px;
}

@property --border-angle {
  syntax: "<angle>";
  inherits: false;
  initial-value: 0deg;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 112px;
  overflow-x: hidden;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--text);
  font-family:
    -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", "Microsoft YaHei",
    "Helvetica Neue", Arial, sans-serif;
  background:
    radial-gradient(circle at 82% 4%, rgba(129, 111, 255, 0.16), transparent 30vw),
    radial-gradient(circle at 13% 18%, rgba(96, 123, 255, 0.14), transparent 28vw),
    linear-gradient(180deg, #f3f5ff 0%, #fbfcff 38%, #f1f3ff 100%);
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    repeating-linear-gradient(
      90deg,
      rgba(26, 21, 74, 0.035) 0,
      rgba(26, 21, 74, 0.035) 1px,
      transparent 1px,
      transparent 92px
    ),
    linear-gradient(180deg, rgba(255, 255, 255, 0.48), rgba(255, 255, 255, 0));
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 88%);
  mask-image: linear-gradient(180deg, #000 0%, transparent 88%);
  z-index: -1;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  display: block;
  max-width: 100%;
}

.container {
  width: min(var(--max), calc(100% - 56px));
  margin: 0 auto;
}

.section {
  position: relative;
}

.svg-defs {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  width: 100%;
  padding: 22px 0 10px;
  transition: padding 180ms ease, background 180ms ease;
}

.site-header.is-scrolled {
  padding-top: 12px;
}

.nav-shell {
  width: min(1380px, calc(100% - 36px));
  min-height: 68px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 24px;
  border: 1px solid var(--glass-line);
  border-radius: 999px;
  background: var(--surface-strong);
  box-shadow: var(--soft-shadow);
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
}

.brand {
  display: inline-flex;
  align-items: center;
}

.brand-logo {
  display: block;
  width: 156px;
  height: auto;
}

.nav-links {
  justify-self: center;
  display: flex;
  align-items: center;
  gap: clamp(16px, 2.6vw, 38px);
  color: var(--text);
  font-size: 14px;
  font-weight: 500;
}

.nav-links a {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 2px;
  border-radius: 999px;
  white-space: nowrap;
  transition: color 160ms ease, background 160ms ease;
}

.nav-links a:not(.is-active):hover,
.nav-links a:not(.is-active):focus-visible {
  color: var(--primary);
  background: rgba(96, 123, 255, 0.07);
}

.nav-links a.is-active,
.nav-links a.is-active:hover,
.nav-links a.is-active:focus,
.nav-links a.is-active:focus-visible {
  color: transparent;
  background: linear-gradient(90deg, var(--primary-deep), var(--primary-bright));
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 18px;
  height: 3px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--primary-deep), var(--primary-bright));
  opacity: 0;
  transform: translateX(-50%) scaleX(0.4);
  transition: opacity 160ms ease, transform 160ms ease;
}

.nav-links a.is-active::after {
  opacity: 1;
  transform: translateX(-50%) scaleX(1);
}

.nav-links a:focus-visible {
  outline: 2px solid rgba(129, 111, 255, 0.42);
  outline-offset: 5px;
}

main {
  padding-top: 100px;
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: rgba(96, 123, 255, 0.09);
}

.menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  border-radius: 2px;
  background: var(--primary);
}

.btn {
  appearance: none;
  font-family: inherit;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 48px;
  padding: 0 24px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 14px;
  border: 1px solid transparent;
  white-space: nowrap;
  transition: transform 160ms ease, box-shadow 160ms ease, border-color 160ms ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  color: #fff;
  background: linear-gradient(90deg, var(--primary-deep), var(--primary-bright));
  box-shadow:
    inset 0 3px 6px rgba(255, 255, 255, 0.16),
    0 12px 24px rgba(129, 111, 255, 0.05);
}

.btn-secondary {
  color: var(--text);
  background: var(--surface);
  border-color: var(--glass-line);
  box-shadow: var(--soft-shadow);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

.btn-small {
  min-height: 40px;
  padding: 0 16px;
  font-size: 13px;
}

.icon-arrow {
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
  display: inline-block;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  vector-effect: non-scaling-stroke;
}

.hero {
  padding: 64px 0 56px;
}

.hero-grid {
  min-height: 560px;
  display: grid;
  grid-template-columns: minmax(500px, 0.95fr) minmax(460px, 1.05fr);
  align-items: center;
  gap: 34px;
}

.hero-copy {
  position: relative;
  z-index: 2;
  min-width: 0;
}

.hero-copy > * {
  opacity: 0;
  translate: 0 14px;
  filter: blur(8px);
  animation: heroEnter 720ms cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.hero-copy h1 {
  animation-delay: 180ms;
}

.hero-copy p {
  animation-delay: 360ms;
}

.hero-copy .actions {
  animation-delay: 500ms;
}

.hero h1 {
  margin: 40px 0 22px;
  font-size: clamp(44px, 4.4vw, 60px);
  line-height: 1.08;
  letter-spacing: 0;
  font-weight: 900;
}

.title-accent {
  color: transparent;
  background: linear-gradient(90deg, var(--primary-deep), var(--primary), #2f8fff);
  background-size: 160% 100%;
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero h1 > span {
  display: block;
  color: var(--primary);
}

.hero h1 > span:not(.hero-line) {
  color: transparent;
  background: linear-gradient(90deg, var(--primary), var(--primary-deep), var(--primary-bright));
  background-size: 180% 100%;
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: heroTitleSweep 1100ms ease-out 480ms both;
}

.hero h1 > .hero-line {
  color: var(--text);
  font-size: clamp(34px, 3.35vw, 42px);
  line-height: 1.15;
  white-space: nowrap;
}

.hero p {
  max-width: 560px;
  margin: 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.68;
  font-weight: 400;
}

.actions {
  margin-top: 32px;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.hero .actions .btn {
  opacity: 0;
  translate: 0 10px;
  animation: heroEnter 620ms cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.hero .actions .btn:first-child {
  animation-delay: 620ms;
}

.hero .actions .btn:last-child {
  animation-delay: 700ms;
}

.hero .actions .btn .icon-arrow,
.nav-cta .icon-arrow,
.module-card > a .icon-arrow {
  transition: translate 180ms ease;
}

.hero .actions .btn:hover .icon-arrow,
.nav-cta:hover .icon-arrow,
.module-card > a:hover .icon-arrow {
  translate: 3px 0;
}

.asset-frame {
  position: relative;
  display: grid;
  place-items: center;
  overflow: visible;
}

.asset-frame img {
  position: relative;
  z-index: 2;
  width: 100%;
  height: 100%;
  object-fit: contain;
  opacity: 1;
  transition: opacity 220ms ease;
}

.asset-frame.is-loading img {
  opacity: 0;
}

.asset-frame.has-image .visual-placeholder {
  opacity: 0;
}

.visual-placeholder {
  position: absolute;
  inset: 50%;
  width: min(62%, 360px);
  aspect-ratio: 1;
  transform: translate(-50%, -50%);
  display: grid;
  place-items: center;
  overflow: hidden;
  border-radius: 34%;
  color: rgba(96, 123, 255, 0.6);
  font-size: 13px;
  font-weight: 500;
  text-align: center;
  border: 1px dashed rgba(96, 123, 255, 0.24);
  background:
    radial-gradient(circle at 50% 38%, rgba(255, 255, 255, 0.96), rgba(239, 241, 255, 0.78) 58%, rgba(129, 111, 255, 0.16) 100%);
  box-shadow: inset 0 0 22px rgba(129, 111, 255, 0.04), var(--soft-shadow);
  opacity: 1;
  transition: opacity 220ms ease;
}

.visual-placeholder::before {
  content: "";
  position: absolute;
  inset: 0;
  transform: translateX(-120%);
  background: linear-gradient(
    105deg,
    transparent 0%,
    rgba(255, 255, 255, 0.32) 38%,
    rgba(255, 255, 255, 0.78) 50%,
    rgba(255, 255, 255, 0.32) 62%,
    transparent 100%
  );
}

.asset-frame.is-loading .visual-placeholder::before {
  animation: skeletonSweep 1300ms ease-in-out infinite;
}

.asset-frame.is-missing .visual-placeholder {
  border-style: solid;
  background:
    radial-gradient(circle at 50% 38%, rgba(255, 255, 255, 0.96), rgba(243, 246, 255, 0.82) 62%, rgba(96, 123, 255, 0.1) 100%);
}

.asset-frame.is-missing .visual-placeholder::before {
  display: none;
}

.visual-placeholder span {
  display: none;
}

.hero-frame {
  isolation: isolate;
  min-height: 520px;
}

.hero-frame > .visual-placeholder {
  width: min(68%, 400px);
}

.hero-frame .hero-media {
  opacity: 0;
  scale: 0.985;
  animation:
    heroVisualEnter 900ms cubic-bezier(0.16, 1, 0.3, 1) 260ms forwards,
    heroVisualFloat 6200ms ease-in-out 1300ms infinite;
}

.hero-frame > img {
  width: min(86%, 590px);
  max-height: 430px;
}

.hero-media {
  position: relative;
  z-index: 2;
  width: min(84%, 540px);
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  pointer-events: none;
}

.hero-media picture {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: block;
}

.hero-media::before {
  content: "";
  position: absolute;
  z-index: 1;
  inset: 13% 8% 8%;
  border-radius: 46%;
  background:
    radial-gradient(ellipse at 50% 45%, rgba(255, 255, 255, 0.82) 0 32%, rgba(245, 249, 255, 0.38) 53%, rgba(218, 233, 255, 0.18) 68%, transparent 82%);
  filter: blur(10px);
  animation: heroGlowPulse 4800ms ease-in-out infinite;
}

.hero-video,
.hero-video-poster {
  position: absolute;
  inset: 0;
  z-index: 2;
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter:
    brightness(1.08)
    saturate(1.08)
    contrast(0.98)
    drop-shadow(0 18px 32px rgba(96, 123, 255, 0.1))
    drop-shadow(0 0 18px rgba(255, 255, 255, 0.72));
  transition: opacity 220ms ease;
}

.hero-video-poster {
  /*
    海报图自带透明通道，不需要 multiply 混合来隐藏底色。移动端 Safari / 微信 /
    国产 WebView 对 mix-blend-mode 叠加多层 mask-composite 支持不稳定，会把浅色的
    3D 大脑渲染成一整块空白（用户反馈的"手机 hero 不显示"）。这里改为单层 radial
    遮罩 + normal 混合，兼容性最好，各端都能正常显示。
  */
  mix-blend-mode: normal;
  -webkit-mask-image: radial-gradient(ellipse at 50% 52%, #000 0 60%, rgba(0, 0, 0, 0.55) 78%, transparent 92%);
  mask-image: radial-gradient(ellipse at 50% 52%, #000 0 60%, rgba(0, 0, 0, 0.55) 78%, transparent 92%);
}

.hero-video.is-fallback-video {
  /* mp4 回退视频没有透明通道，桌面端仍用 multiply + 遮罩隐藏底色（移动端不加载视频）。 */
  mix-blend-mode: multiply;
  -webkit-mask-image:
    radial-gradient(ellipse at 50% 52%, #000 0 48%, rgba(0, 0, 0, 0.88) 60%, rgba(0, 0, 0, 0.38) 76%, transparent 91%),
    linear-gradient(90deg, transparent 0%, #000 9%, #000 88%, transparent 100%);
  -webkit-mask-composite: source-in;
  mask-image:
    radial-gradient(ellipse at 50% 52%, #000 0 48%, rgba(0, 0, 0, 0.88) 60%, rgba(0, 0, 0, 0.38) 76%, transparent 91%),
    linear-gradient(90deg, transparent 0%, #000 9%, #000 88%, transparent 100%);
  mask-composite: intersect;
}

.hero-video {
  opacity: 0;
  pointer-events: none;
}

.hero-video.is-fallback-video {
  border-radius: 36%;
  filter: brightness(1.03) saturate(1.06) contrast(1.02);
}

.hero-video-poster {
  opacity: 0.94;
}

.hero-media.is-video-ready .hero-video {
  opacity: 1;
}

.hero-media.is-video-ready .hero-video-poster {
  opacity: 0;
}

.hero-media.is-video-unavailable .hero-video {
  display: none;
}

.hero-media.is-video-unavailable .hero-video-poster {
  opacity: 0.94;
}

.hero-media.is-static-loop .hero-video-poster {
  opacity: 0.96;
  animation: staticHeroPosterFloat 5200ms ease-in-out infinite;
}

.hero-media.is-static-loop::before {
  animation: heroGlowPulse 4200ms ease-in-out infinite;
}

.hero-media.is-static-loop::after {
  content: "";
  position: absolute;
  z-index: 1;
  inset: 13% 8% 8%;
  border-radius: 46%;
  background:
    radial-gradient(circle at 50% 50%, rgba(96, 123, 255, 0.12), transparent 42%),
    conic-gradient(from 0deg, transparent 0deg, rgba(96, 123, 255, 0.16) 72deg, transparent 148deg, rgba(242, 90, 168, 0.12) 236deg, transparent 360deg);
  filter: blur(8px);
  opacity: 0.72;
  animation: staticHeroHaloSpin 9600ms linear infinite;
}

.orbit {
  position: absolute;
  inset: 11% 5%;
  border: 2px solid rgba(96, 123, 255, 0.14);
  border-radius: 50%;
  transform: rotate(-12deg);
  animation: orbitPulse 5200ms ease-in-out infinite;
}

.orbit-two {
  inset: 20% 14%;
  transform: rotate(22deg);
  border-style: dashed;
  animation-delay: 700ms;
}

.agent-tag {
  position: absolute;
  z-index: 4;
  min-height: 46px;
  padding: 0 18px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  border-radius: 999px;
  color: var(--text);
  font-weight: 500;
  font-size: 13px;
  background: var(--surface-medium);
  border: 1px solid var(--glass-line);
  box-shadow: var(--soft-shadow);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  white-space: nowrap;
}

.hero-frame .agent-tag {
  opacity: 0;
  gap: 8px;
  translate: 0 10px;
  animation:
    heroEnter 480ms cubic-bezier(0.16, 1, 0.3, 1) forwards,
    agentBubbleFloat 5200ms ease-in-out infinite;
}

.hero-frame .agent-tag .line-icon {
  width: 28px;
  height: 28px;
}

.hero-frame .tag-procurement { animation-delay: 560ms, 1200ms; }
.hero-frame .tag-bim { animation-delay: 620ms, 1400ms; }
.hero-frame .tag-weighing { animation-delay: 680ms, 1600ms; }
.hero-frame .tag-finance { animation-delay: 740ms, 1800ms; }
.hero-frame .tag-wechat { animation-delay: 800ms, 2000ms; }

.tag-procurement { top: 18%; left: 2%; }
.tag-bim { top: 31%; right: -5%; }
.tag-weighing { top: 48%; left: 0; }
.tag-finance { bottom: 16%; left: 3%; }
.tag-wechat { bottom: 16%; right: 0; }

.line-icon {
  --icon: var(--primary);
  flex: 0 0 auto;
  width: 36px;
  height: 36px;
  display: inline-block;
  color: var(--icon);
  fill: none;
  stroke: url("#theme-icon-gradient") currentColor;
  stroke-width: 1.65;
  stroke-linecap: round;
  stroke-linejoin: round;
  vector-effect: non-scaling-stroke;
  overflow: visible;
}

.metrics-section {
  padding: 8px 0 58px;
}

.metrics-section.motion-ready .metric-card,
.metrics-section.motion-ready .section-title,
.metrics-section.motion-ready .pain-card {
  opacity: 0;
  translate: 0 18px;
  scale: 0.985;
  filter: blur(8px);
}

.metrics-section.is-in-view .metric-card,
.metrics-section.is-in-view .section-title,
.metrics-section.is-in-view .pain-card {
  animation: sectionItemEnter 520ms cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.metrics-section.is-in-view .metric-card:nth-child(1) { animation-delay: 20ms; }
.metrics-section.is-in-view .metric-card:nth-child(2) { animation-delay: 70ms; }
.metrics-section.is-in-view .metric-card:nth-child(3) { animation-delay: 120ms; }
.metrics-section.is-in-view .metric-card:nth-child(4) { animation-delay: 170ms; }

.metrics-section.is-in-view .metric-card strong {
  animation: metricValuePop 460ms cubic-bezier(0.16, 1, 0.3, 1) both;
}

.metrics-section.is-in-view .metric-card:nth-child(1) strong { animation-delay: 140ms; }
.metrics-section.is-in-view .metric-card:nth-child(2) strong { animation-delay: 190ms; }
.metrics-section.is-in-view .metric-card:nth-child(3) strong { animation-delay: 240ms; }
.metrics-section.is-in-view .metric-card:nth-child(4) strong { animation-delay: 290ms; }

.metrics-section.is-in-view .mini-asset img {
  animation: metricAssetLift 540ms cubic-bezier(0.16, 1, 0.3, 1) both;
}

.metrics-section.is-in-view .section-title {
  animation-delay: 260ms;
}

.metrics-section.is-in-view .pain-card:nth-child(1) { animation-delay: 340ms; }
.metrics-section.is-in-view .pain-card:nth-child(2) { animation-delay: 390ms; }
.metrics-section.is-in-view .pain-card:nth-child(3) { animation-delay: 440ms; }
.metrics-section.is-in-view .pain-card:nth-child(4) { animation-delay: 490ms; }

.metrics-section.is-in-view .pain-icon {
  animation: painIconPop 620ms cubic-bezier(0.16, 1, 0.3, 1) both;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.metric-card,
.pain-card,
.layer-card,
.module-card,
.case-card,
.whitepaper-panel,
.final-cta {
  background: var(--surface);
  border: 1px solid var(--glass-line);
  box-shadow: var(--soft-shadow);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
}

.interactive-card {
  --pointer-x: 50%;
  --pointer-y: 38%;
  position: relative;
  isolation: isolate;
  overflow: hidden;
  translate: 0 0;
  transition:
    translate 240ms ease,
    border-color 240ms ease,
    box-shadow 240ms ease,
    background 240ms ease;
}

.interactive-card::before,
.interactive-card::after {
  content: "";
  position: absolute;
  pointer-events: none;
  border-radius: inherit;
}

.interactive-card::before {
  inset: -2px;
  z-index: 0;
  padding: 1.5px;
  opacity: 0;
  background:
    radial-gradient(
      260px circle at var(--pointer-x) var(--pointer-y),
      rgba(129, 111, 255, 0.62) 0,
      rgba(96, 123, 255, 0.42) 28%,
      rgba(129, 111, 255, 0.16) 54%,
      transparent 72%
    ),
    conic-gradient(
      from var(--border-angle),
      rgba(255, 255, 255, 0) 0deg,
      rgba(129, 111, 255, 0.38) 58deg,
      rgba(96, 123, 255, 0.34) 128deg,
      rgba(129, 111, 255, 0.16) 212deg,
      rgba(96, 123, 255, 0.24) 288deg,
      rgba(255, 255, 255, 0) 360deg
    );
  -webkit-mask:
    linear-gradient(#000 0 0) content-box,
    linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask:
    linear-gradient(#000 0 0) content-box,
    linear-gradient(#000 0 0);
  mask-composite: exclude;
  animation: cardBorderOrbit 4200ms linear infinite paused;
}

.interactive-card::after {
  inset: 0;
  z-index: 0;
  opacity: 0;
  background:
    radial-gradient(
      520px circle at var(--pointer-x) var(--pointer-y),
      rgba(129, 111, 255, 0.075) 0,
      rgba(96, 123, 255, 0.052) 32%,
      rgba(129, 111, 255, 0.026) 56%,
      transparent 82%
    ),
    linear-gradient(135deg, rgba(129, 111, 255, 0.025), rgba(96, 123, 255, 0.018));
  transition: opacity 260ms ease;
}

.interactive-card > * {
  position: relative;
  z-index: 1;
}

.interactive-card:hover,
.interactive-card:focus-within {
  translate: 0 -4px;
  border-color: rgba(129, 111, 255, 0.18);
  box-shadow:
    0 24px 56px rgba(96, 123, 255, 0.095),
    0 8px 24px rgba(129, 111, 255, 0.055);
}

.interactive-card:hover::before,
.interactive-card:focus-within::before,
.interactive-card.is-pointer-active::before {
  opacity: 1;
  animation-play-state: running;
}

.interactive-card:hover::after,
.interactive-card:focus-within::after,
.interactive-card.is-pointer-active::after {
  opacity: 1;
}

.metric-card {
  min-height: 180px;
  padding: 24px;
  border-radius: var(--radius-lg);
  display: grid;
  grid-template-columns: minmax(0, 1fr) 108px;
  grid-template-areas:
    "title media"
    "value media"
    "copy copy";
  align-items: start;
  column-gap: 12px;
  overflow: hidden;
}

.metric-card > div:first-child {
  min-width: 0;
  display: grid;
  grid-template-rows: auto auto 1fr;
  align-content: start;
}

.metric-card h3,
.module-card h3,
.pain-card h3,
.layer-card h3 {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
}

.metric-card h3 {
  min-width: 0;
}

.metric-card strong {
  display: block;
  margin: 14px 0 0;
  color: var(--primary);
  font-family: "DIN Alternate", "DIN Condensed", "Bahnschrift", "Arial Narrow", "Helvetica Neue", Arial, sans-serif;
  font-size: 40px;
  line-height: 1;
  letter-spacing: 0;
  font-weight: 900;
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}

.metric-card strong span {
  font-size: 23px;
}

.metric-card .metric-cycle-value {
  font-size: 34px;
}

.metric-card p {
  max-width: 100%;
}

.metric-card p,
.pain-card p,
.layer-card p,
.module-card li,
.case-content p,
.whitepaper-head p,
.paper-card p,
.final-cta p,
.footer-brand p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.62;
  font-weight: 400;
}

.metric-card p {
  margin-top: 18px;
}

.mini-asset {
  grid-area: media;
  justify-self: end;
  align-self: center;
  width: 108px;
  height: 86px;
}

.section-title {
  margin: 58px 0 28px;
  text-align: center;
  color: var(--text);
  font-size: clamp(24px, 2.8vw, 36px);
  line-height: 1.25;
  font-weight: 800;
}

.pain-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.pain-card {
  position: relative;
  min-height: 390px;
  padding: 28px 24px 0;
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  align-items: stretch;
  justify-content: flex-start;
  gap: 0;
}

.pain-card-head {
  position: relative;
  z-index: 3;
  width: auto;
  max-width: none;
  height: 132px;
  margin: -28px -24px 0;
  padding: 28px 24px 18px;
  border-radius: var(--radius-md) var(--radius-md) 20px 20px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.96) 0%, rgba(255, 255, 255, 0.9) 68%, rgba(255, 255, 255, 0.34) 100%);
  -webkit-backdrop-filter: blur(3px);
  backdrop-filter: blur(3px);
}

.pain-card h3 {
  margin-bottom: 8px;
  font-size: 17px;
  line-height: 1.25;
}

.pain-card p {
  font-size: 14px;
  line-height: 1.7;
}

.pain-grid .pain-card {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.98) 0%, rgba(249, 251, 255, 0.92) 100%) !important;
  background-image:
    linear-gradient(180deg, rgba(255, 255, 255, 0.98) 0%, rgba(249, 251, 255, 0.92) 100%) !important;
  overflow: hidden;
}

.pain-card::before,
.pain-card::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
}

.pain-card::before {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.3) 0%, rgba(255, 255, 255, 0.08) 34%, rgba(255, 255, 255, 0) 64%),
    linear-gradient(90deg, rgba(255, 255, 255, 0.26), rgba(255, 255, 255, 0.04) 62%, rgba(255, 255, 255, 0.16));
}

.pain-card::after {
  border-radius: inherit;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.7);
}

.pain-scene {
  position: absolute;
  inset: 0;
  z-index: 0;
  display: block;
  width: 100%;
  margin: 0;
  overflow: hidden;
}

.pain-scene img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  object-position: center bottom;
  opacity: 0.92;
  transform: translateY(18px) scale(1.05);
  transform-origin: center bottom;
}

.layer-card .line-icon {
  width: 48px;
  height: 48px;
}

.architecture-section {
  padding: 18px 0 50px;
}

.architecture-section.motion-ready .section-title,
.architecture-section.motion-ready .architecture-core-logo,
.architecture-section.motion-ready .architecture-visual .agent-tag,
.architecture-section.motion-ready .layer-list {
  opacity: 0;
  translate: 0 18px;
  scale: 0.985;
  filter: blur(8px);
}

.architecture-section.is-in-view .section-title,
.architecture-section.is-in-view .architecture-core-logo,
.architecture-section.is-in-view .architecture-visual .agent-tag,
.architecture-section.is-in-view .layer-list {
  animation: sectionItemEnter 560ms cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.architecture-section.is-in-view .section-title { animation-delay: 20ms; }
.architecture-section.is-in-view .architecture-core-logo { animation-delay: 100ms; }
.architecture-section.is-in-view .architecture-visual .agent-tag {
  animation:
    sectionItemEnter 520ms cubic-bezier(0.16, 1, 0.3, 1) forwards,
    agentBubbleFloat 5600ms ease-in-out infinite;
}
.architecture-section.is-in-view .architecture-visual .arch-top { animation-delay: 180ms, 1100ms; }
.architecture-section.is-in-view .architecture-visual .arch-left { animation-delay: 230ms, 1300ms; }
.architecture-section.is-in-view .architecture-visual .arch-right { animation-delay: 280ms, 1500ms; }
.architecture-section.is-in-view .architecture-visual .arch-finance { animation-delay: 330ms, 1700ms; }
.architecture-section.is-in-view .architecture-visual .arch-wechat { animation-delay: 380ms, 1900ms; }
.architecture-section.is-in-view .architecture-visual .arch-bottom { animation-delay: 430ms, 2100ms; }

.architecture-section.is-in-view .layer-list { animation-delay: 180ms; }

.architecture-section.is-in-view .architecture-core-logo {
  animation-name: architectureCoreEnter;
}

.architecture-section.is-in-view .architecture-visual .orbit {
  animation: orbitPulse 5200ms ease-in-out infinite, architectureOrbitWake 900ms ease-out 180ms both;
}

.architecture-grid {
  display: grid;
  grid-template-columns: minmax(420px, 0.96fr) minmax(440px, 1fr);
  align-items: center;
  gap: 44px;
}

.hero-grid > *,
.architecture-grid > *,
.case-card > *,
.whitepaper-grid > *,
.final-cta > *,
.metric-card > *,
.module-card > *,
.paper-card > * {
  min-width: 0;
}

.architecture-visual {
  isolation: isolate;
  min-height: 560px;
}

.architecture-visual > .architecture-core-logo {
  z-index: 2;
  width: min(88%, 560px);
  max-height: 560px;
}

.architecture-visual > picture {
  position: relative;
  z-index: 2;
  display: block;
  width: min(88%, 560px);
  aspect-ratio: 1;
}

.architecture-visual > .architecture-core-visual::before {
  content: "";
  position: absolute;
  z-index: 1;
  inset: 4%;
  border-radius: 50%;
  background:
    radial-gradient(circle at 50% 54%, rgba(255, 255, 255, 0.82) 0 38%, rgba(245, 249, 255, 0.42) 58%, rgba(218, 233, 255, 0.18) 72%, transparent 86%);
  filter: blur(14px);
}

.architecture-visual > picture .architecture-core-logo {
  display: block;
  width: 100%;
  height: 100%;
  max-height: 560px;
  object-fit: contain;
  object-position: center;
  filter:
    brightness(1.03)
    saturate(1.02)
    contrast(0.99)
    drop-shadow(0 20px 34px rgba(96, 123, 255, 0.08))
    drop-shadow(0 0 24px rgba(255, 255, 255, 0.7));
  mix-blend-mode: multiply;
  -webkit-mask-image: radial-gradient(ellipse at 50% 52%, #000 0 68%, rgba(0, 0, 0, 0.88) 80%, rgba(0, 0, 0, 0.4) 93%, transparent 100%);
  mask-image: radial-gradient(ellipse at 50% 52%, #000 0 68%, rgba(0, 0, 0, 0.88) 80%, rgba(0, 0, 0, 0.4) 93%, transparent 100%);
}

.architecture-visual .orbit {
  display: none;
}

.arch-top { top: 21%; left: 24%; transform: translate(-50%, -50%); }
.arch-left { top: 54%; left: 8%; transform: translate(-50%, -50%); }
.arch-right { top: 54%; left: 88%; transform: translate(-50%, -50%); }
.arch-finance { top: 86%; left: 25%; transform: translate(-50%, -50%); }
.arch-bottom { top: 21%; left: 72%; transform: translate(-50%, -50%); }
.arch-wechat { top: 86%; left: 72%; transform: translate(-50%, -50%); }

.agent-connector {
  position: absolute;
  z-index: 3;
  width: 16px;
  height: 16px;
  transform: translate(-50%, -50%);
  pointer-events: none;
  display: none;
}

.agent-connector::before {
  content: "";
  position: absolute;
  pointer-events: none;
}

.agent-connector::before {
  inset: 0;
  border-radius: 50%;
  background:
    radial-gradient(circle at 50% 50%, #fff 0 28%, rgba(255, 255, 255, 0.95) 29% 40%, transparent 41%),
    linear-gradient(135deg, var(--primary-deep), var(--primary));
  box-shadow: 0 0 0 3px rgba(96, 123, 255, 0.1), 0 8px 18px rgba(96, 123, 255, 0.16);
}

.agent-connector::after {
  display: none;
}

.connector-top {
  top: 10%;
  left: 50%;
}

.connector-left {
  top: 28.5%;
  left: 30.5%;
}

.connector-right {
  top: 34.5%;
  left: 71.5%;
}

.connector-bottom {
  top: 88.5%;
  left: 50%;
}

.connector-finance {
  top: 85.5%;
  left: 14%;
}

.connector-wechat {
  top: 85.5%;
  left: 85.5%;
}

.architecture-visual .agent-tag {
  gap: 0;
  padding: 0 22px;
  white-space: nowrap;
}

.agent-matrix {
  display: contents;
}

.architecture-visual .agent-tag .line-icon {
  display: none;
}

.layer-list {
  display: grid;
  gap: 16px;
}

.layer-card {
  min-height: 92px;
  padding: 18px 24px;
  border-radius: var(--radius-md);
  display: grid;
  grid-template-columns: 64px 1fr;
  align-items: center;
  gap: 18px;
}

.layer-icon {
  width: 58px;
  height: 58px;
  object-fit: contain;
}

.layer-card h3 {
  margin-bottom: 4px;
  color: var(--primary);
  background: linear-gradient(90deg, var(--primary-deep), var(--primary));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.modules-section {
  padding: 8px 0 58px;
}

.modules-section.motion-ready .section-title,
.modules-section.motion-ready .module-grid {
  opacity: 0;
  translate: 0 24px;
  scale: 0.985;
  filter: blur(8px);
}

.modules-section.is-in-view .section-title,
.modules-section.is-in-view .module-grid {
  animation: sectionItemEnter 640ms cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.modules-section.is-in-view .section-title { animation-delay: 20ms; }
.modules-section.is-in-view .module-grid { animation-delay: 90ms; }

.module-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
}

.module-card {
  min-height: 326px;
  padding: 22px 18px 20px;
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
}

.module-card h3 {
  text-align: center;
  min-height: 0;
  margin-bottom: 10px;
  line-height: 1.25;
  white-space: nowrap;
}

.module-asset {
  width: 132px;
  height: 112px;
  margin: 0 auto 16px;
  overflow: visible;
}

.module-asset img {
  width: 132px;
  height: 132px;
  object-fit: contain;
  transform: translateY(-14px);
}

.module-card ul {
  margin: 0;
  padding-left: 14px;
  display: grid;
  gap: 8px;
}

.module-card li {
  font-size: 13px;
  line-height: 1.42;
  white-space: nowrap;
}

.module-card li::marker {
  color: var(--primary);
}

.module-card > a {
  margin-top: 22px;
  padding-top: 0;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--primary);
  font-weight: 600;
  font-size: 14px;
}

.case-section {
  padding: 0 0 48px;
}

.case-section.motion-ready .section-title,
.case-section.motion-ready .case-card {
  opacity: 0;
  translate: 0 24px;
  filter: blur(8px);
}

.case-section.motion-ready .timeline::before {
  scale: 0 1;
  transform-origin: left center;
}

.case-section.is-in-view .section-title,
.case-section.is-in-view .case-card {
  animation: sectionItemEnter 640ms cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.case-section.is-in-view .section-title { animation-delay: 20ms; }
.case-section.is-in-view .case-card { animation-delay: 90ms; }

.case-section.is-in-view .timeline::before {
  animation: timelineLineDraw 520ms cubic-bezier(0.16, 1, 0.3, 1) 220ms both;
}

/* ===== 案例卡片轮播：左右按钮 + 圆点 + 自动切换 + 触摸滑动 ===== */
.case-carousel {
  position: relative;
  display: grid;
  gap: 18px;
}

.case-viewport {
  overflow: hidden;
  border-radius: var(--radius-xl);
}

.case-track {
  display: flex;
  align-items: stretch;
  transition: transform 560ms cubic-bezier(0.16, 1, 0.3, 1);
  will-change: transform;
}

@media (prefers-reduced-motion: reduce) {
  .case-track {
    transition: none;
  }
}

.case-card {
  flex: 0 0 100%;
  width: 100%;
  box-sizing: border-box;
  padding: 26px 28px;
  border-radius: var(--radius-xl);
  display: grid;
  grid-template-columns: 272px minmax(0, 1fr);
  gap: 30px;
  align-items: end;
}

.case-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-top: 2px;
}

.case-arrow {
  appearance: none;
  flex: 0 0 auto;
  width: 42px;
  height: 42px;
  display: inline-grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid var(--glass-line);
  background: var(--surface);
  color: var(--primary-deep);
  box-shadow: var(--soft-shadow);
  cursor: pointer;
  transition:
    border-color 180ms ease,
    background 180ms ease,
    transform 180ms ease;
}

.case-arrow:hover,
.case-arrow:focus-visible {
  border-color: var(--primary);
  background: rgba(96, 123, 255, 0.1);
  outline: 0;
  transform: translateY(-1px);
}

.case-arrow:active {
  transform: scale(0.94);
}

.case-arrow .icon-chevron {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.case-dots {
  display: inline-flex;
  align-items: center;
  gap: 9px;
}

.case-dot {
  appearance: none;
  width: 9px;
  height: 9px;
  padding: 0;
  border: 0;
  border-radius: 999px;
  background: rgba(96, 123, 255, 0.28);
  cursor: pointer;
  transition:
    width 240ms ease,
    background 240ms ease;
}

.case-dot:hover {
  background: rgba(96, 123, 255, 0.52);
}

.case-dot.is-active {
  width: 26px;
  background: linear-gradient(90deg, var(--primary-deep), var(--primary));
}

.case-carousel.is-single .case-controls {
  display: none;
}

.case-image {
  width: 272px;
  aspect-ratio: 1 / 1;
  min-height: 0;
  justify-self: center;
  align-self: end;
  overflow: hidden;
  border-radius: 18px;
  background: linear-gradient(135deg, #eff1ff, #fbfcff);
}

.case-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.case-image.is-placeholder-only .visual-placeholder {
  opacity: 1;
  inset: 0;
  width: 100%;
  transform: none;
  border-radius: inherit;
  border: 0;
}

.case-content {
  min-height: 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  padding-top: 4px;
}

.case-heading {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.case-heading h3 {
  margin: 0;
  font-size: clamp(22px, 1.65vw, 26px);
  line-height: 1.2;
  font-weight: 700;
}

.case-heading span {
  padding: 5px 10px;
  color: var(--primary);
  font-weight: 600;
  border-radius: 10px;
  background: rgba(96, 123, 255, 0.1);
  font-size: 13px;
}

.case-content > p {
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.54;
}

.case-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin: 16px 0 18px;
}

.case-stats div {
  min-height: 74px;
  padding: 9px 8px;
  text-align: center;
  border: 1px solid var(--glass-line);
  border-radius: 16px;
  background: var(--surface-medium);
  box-shadow: var(--soft-shadow);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

.case-stats span,
.case-stats small {
  display: block;
  color: var(--muted);
  font-size: 12px;
  font-weight: 400;
}

.case-stats strong {
  display: block;
  margin: 4px 0;
  color: var(--primary);
  font-size: 19px;
  font-weight: 900;
}

.timeline {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 0;
  margin-top: 2px;
  width: 100%;
}

.timeline::before {
  content: "";
  position: absolute;
  top: 9px;
  left: 0;
  right: 0;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--primary-deep), var(--primary));
}

.timeline li {
  position: relative;
  padding-top: 24px;
  text-align: center;
}

.timeline span {
  position: absolute;
  top: 0;
  left: 50%;
  width: 18px;
  height: 18px;
  transform: translateX(-50%);
  border: 3px solid transparent;
  border-radius: 50%;
  background:
    linear-gradient(#fff, #fff) padding-box,
    linear-gradient(135deg, var(--primary-deep), var(--primary)) border-box;
  box-shadow: 0 0 0 3px rgba(129, 111, 255, 0.05);
}

.timeline b,
.timeline small {
  display: block;
  color: var(--text);
  font-size: 12px;
  font-weight: 600;
}

.timeline small {
  margin-top: 4px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 400;
}

.whitepaper-section {
  padding: 0 0 58px;
}

.whitepaper-section.motion-ready .whitepaper-head,
.whitepaper-section.motion-ready .whitepaper-grid {
  opacity: 0;
  translate: 0 24px;
  scale: 0.985;
  filter: blur(8px);
}

.whitepaper-section.is-in-view .whitepaper-head,
.whitepaper-section.is-in-view .whitepaper-grid {
  animation: sectionItemEnter 640ms cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.whitepaper-section.is-in-view .whitepaper-head { animation-delay: 20ms; }
.whitepaper-section.is-in-view .whitepaper-grid { animation-delay: 100ms; }

.whitepaper-panel {
  padding: 42px 42px 38px;
  border-radius: var(--radius-xl);
}

.whitepaper-head {
  text-align: center;
  margin-bottom: 28px;
}

.whitepaper-head h2 {
  margin: 0 0 12px;
  font-size: clamp(26px, 2.6vw, 36px);
  font-weight: 700;
}

.whitepaper-grid {
  display: block;
  min-width: 0;
}

.books-asset {
  width: 100%;
  height: 430px;
  min-height: 0;
  align-self: center;
  justify-self: center;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  overflow: visible;
  isolation: isolate;
}

.books-asset::before {
  content: "";
  position: absolute;
  inset: -48px -40px -58px -54px;
  z-index: 0;
  background-image:
    linear-gradient(rgba(129, 111, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(96, 165, 255, 0.038) 1px, transparent 1px),
    radial-gradient(circle at 43% 58%, rgba(96, 165, 255, 0.1), transparent 38%),
    linear-gradient(112deg, transparent 14%, rgba(129, 111, 255, 0.065) 46%, transparent 80%);
  background-size: 46px 46px, 46px 46px, 100% 100%, 100% 100%;
  -webkit-mask-image: radial-gradient(
    ellipse at 45% 57%,
    rgba(0, 0, 0, 0.96) 0%,
    rgba(0, 0, 0, 0.82) 34%,
    rgba(0, 0, 0, 0.38) 56%,
    rgba(0, 0, 0, 0.08) 72%,
    transparent 86%
  );
  mask-image: radial-gradient(
    ellipse at 45% 57%,
    rgba(0, 0, 0, 0.96) 0%,
    rgba(0, 0, 0, 0.82) 34%,
    rgba(0, 0, 0, 0.38) 56%,
    rgba(0, 0, 0, 0.08) 72%,
    transparent 86%
  );
  opacity: 0.58;
  filter: blur(0.35px);
}

.books-asset::after {
  content: "";
  position: absolute;
  left: 10%;
  right: 8%;
  bottom: 20px;
  z-index: 1;
  height: 86px;
  background:
    radial-gradient(ellipse at 32% 54%, rgba(96, 165, 255, 0.2), transparent 56%),
    radial-gradient(ellipse at 64% 44%, rgba(242, 90, 168, 0.14), transparent 58%);
  filter: blur(18px);
  opacity: 0.72;
  transform: skewX(-10deg);
}

.books-asset img {
  position: absolute;
  left: -16px;
  right: auto;
  bottom: -12px;
  display: block;
  width: 112%;
  height: 106%;
  max-width: none;
  max-height: none;
  object-fit: contain;
  object-position: left bottom;
  filter: drop-shadow(0 22px 26px rgba(96, 123, 255, 0.1));
  z-index: 2;
}

.paper-cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.paper-card {
  position: relative;
  min-height: 228px;
  padding: 22px 20px 18px;
  border: 1px solid var(--glass-line);
  border-radius: 22px;
  background: var(--surface-medium);
  box-shadow: var(--soft-shadow);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  display: grid;
  gap: 14px;
  align-content: start;
  overflow: hidden;
}

.paper-body {
  display: grid;
  grid-template-columns: 112px minmax(0, 1fr);
  align-items: center;
  gap: 16px;
  padding-right: 28px;
}

.paper-copy {
  display: grid;
  gap: 4px;
  align-content: center;
}

.bookmark {
  position: absolute;
  top: 16px;
  right: 20px;
  width: 16px;
  height: 30px;
  border-radius: 4px 4px 1px 1px;
  background: linear-gradient(180deg, #ff5ba4, #ff7bbb);
}

.bookmark::after {
  content: "";
  position: absolute;
  bottom: -1px;
  left: 0;
  border-left: 8px solid transparent;
  border-right: 8px solid transparent;
  border-bottom: 8px solid rgba(255, 255, 255, 0.72);
}

.paper-card h3 {
  margin: 0 26px 0 0;
  padding-top: 0;
  font-size: 18px;
  line-height: 1.35;
  font-weight: 700;
}

.paper-card p {
  margin: 0;
  min-height: 0;
  line-height: 1.5;
}

.paper-preview {
  width: 112px;
  height: 132px;
  min-height: 132px;
  margin: 0;
  overflow: hidden;
  border-radius: 16px;
  border: 1px solid var(--glass-line);
  background: rgba(239, 241, 255, 0.72);
}

.paper-preview img {
  object-fit: contain;
  object-position: center;
}

.paper-actions {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  gap: 8px;
  margin-top: 0;
}

.paper-actions .btn {
  min-width: 0;
  min-height: 40px;
  padding: 0 10px;
  font-size: 13px;
  gap: 6px;
}

.final-section {
  padding: 0 0 46px;
}

.final-section.motion-ready .final-cta {
  opacity: 0;
  translate: 0 24px;
  scale: 0.985;
  filter: blur(8px);
}

.final-section.is-in-view .final-cta {
  animation: finalPanelEnter 640ms cubic-bezier(0.16, 1, 0.3, 1) 20ms forwards;
}

.final-cta {
  min-height: 0;
  padding: 16px 44px;
  border-radius: var(--radius-xl);
  background:
    linear-gradient(118deg, rgba(255, 255, 255, 0.88) 0%, rgba(247, 249, 255, 0.78) 42%, rgba(237, 246, 255, 0.86) 100%),
    linear-gradient(72deg, rgba(129, 111, 255, 0.1) 0%, rgba(255, 255, 255, 0) 48%),
    linear-gradient(252deg, rgba(96, 165, 255, 0.12) 0%, rgba(255, 255, 255, 0) 52%);
  display: grid;
  grid-template-columns: 1fr 0.9fr;
  align-items: center;
  gap: 40px;
  overflow: hidden;
}

.final-cta h2 {
  margin: 0 0 14px;
  font-size: clamp(26px, 2.6vw, 36px);
  font-weight: 700;
}

.city-asset {
  width: min(100%, 380px);
  height: 200px;
  min-height: 0;
  justify-self: end;
  overflow: hidden;
}

.city-asset img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 20px;
}

.site-footer {
  padding: 16px 0 38px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.55fr repeat(5, minmax(110px, 0.72fr));
  gap: 34px;
  align-items: start;
}

.footer-brand .brand {
  font-size: 20px;
  margin-bottom: 14px;
}

.footer-brand p {
  max-width: 330px;
}

.socials {
  display: flex;
  align-items: center;
  gap: 18px;
  margin: 24px 0 22px;
}

.socials a {
  width: 30px;
  height: 30px;
  color: var(--muted);
}

.socials .line-icon {
  width: 30px;
  height: 30px;
  transform: scale(0.72);
}

.footer-brand small,
.footer-legal {
  color: var(--soft);
  font-weight: 400;
}

.footer-legal {
  white-space: nowrap;
}

.footer-col {
  display: grid;
  gap: 12px;
}

.footer-col summary {
  list-style: none;
  pointer-events: none;
}

.footer-col summary::-webkit-details-marker {
  display: none;
}

.footer-col summary span {
  margin: 0 0 4px;
  color: var(--text);
  font-size: 15px;
  font-weight: 700;
}

.footer-link-list {
  display: grid;
  gap: 12px;
}

.footer-col a,
.footer-col p {
  color: var(--muted);
  font-size: 13px;
  font-weight: 400;
  line-height: 1.45;
}

.footer-legal {
  margin-top: 18px;
}

body.is-demo-modal-open {
  overflow: hidden;
}

.demo-modal {
  position: fixed;
  inset: 0;
  z-index: 120;
  display: grid;
  place-items: center;
  padding: 24px;
}

.demo-modal[hidden] {
  display: none;
}

.demo-modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(20, 20, 50, 0.36);
  opacity: 0;
  transition: opacity 180ms ease;
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.demo-modal__dialog {
  position: relative;
  z-index: 1;
  width: min(100%, 520px);
  padding: 30px;
  border: 1px solid var(--glass-line);
  border-radius: 28px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.96), rgba(246, 248, 255, 0.92)),
    radial-gradient(circle at 84% 18%, rgba(96, 123, 255, 0.14), transparent 44%);
  box-shadow: 0 28px 76px rgba(26, 21, 74, 0.2);
  opacity: 0;
  translate: 0 16px;
  scale: 0.985;
  transition: opacity 180ms ease, translate 180ms ease, scale 180ms ease;
}

.demo-modal.is-open .demo-modal__backdrop {
  opacity: 1;
}

.demo-modal.is-open .demo-modal__dialog {
  opacity: 1;
  translate: 0 0;
  scale: 1;
}

.demo-modal__close {
  appearance: none;
  position: absolute;
  top: 18px;
  right: 18px;
  width: 38px;
  height: 38px;
  border: 1px solid rgba(96, 123, 255, 0.12);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.78);
  cursor: pointer;
}

.demo-modal__close span,
.demo-modal__close span::after {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: var(--primary);
  content: "";
}

.demo-modal__close span {
  transform: translate(-50%, -50%) rotate(45deg);
}

.demo-modal__close span::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.demo-modal__head {
  padding-right: 40px;
}

.demo-modal__head span {
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
}

.demo-modal__head h2 {
  margin: 8px 0 10px;
  color: var(--text);
  font-size: 28px;
  line-height: 1.2;
}

.demo-modal__head p,
.demo-form__status {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

.demo-form {
  margin-top: 24px;
  display: grid;
  gap: 14px;
}

.pdf-modal {
  position: fixed;
  inset: 0;
  z-index: 130;
  display: grid;
  place-items: center;
  padding: 22px;
}

.pdf-modal[hidden] {
  display: none;
}

.pdf-modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(20, 20, 50, 0.42);
  opacity: 0;
  transition: opacity 180ms ease;
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.pdf-modal__dialog {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  width: min(1180px, 100%);
  height: min(860px, calc(100dvh - 44px));
  overflow: hidden;
  border: 1px solid var(--glass-line);
  border-radius: 24px;
  background: rgba(250, 251, 255, 0.96);
  box-shadow: 0 28px 76px rgba(26, 21, 74, 0.22);
  opacity: 0;
  translate: 0 16px;
  scale: 0.985;
  transition: opacity 180ms ease, translate 180ms ease, scale 180ms ease;
}

.pdf-modal.is-open .pdf-modal__backdrop {
  opacity: 1;
}

.pdf-modal.is-open .pdf-modal__dialog {
  opacity: 1;
  translate: 0 0;
  scale: 1;
}

.pdf-modal__bar {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 16px;
  min-height: 66px;
  padding: 12px 14px 12px 22px;
  border-bottom: 1px solid rgba(96, 123, 255, 0.12);
  background: rgba(255, 255, 255, 0.86);
}

.pdf-modal__bar h2 {
  margin: 0;
  overflow: hidden;
  color: var(--text);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.35;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.pdf-modal__actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.pdf-modal__close {
  position: relative;
  top: auto;
  right: auto;
  flex: 0 0 auto;
}

.pdf-modal__viewer {
  min-height: 0;
  overflow-x: hidden;
  overflow-y: auto;
  background:
    linear-gradient(180deg, rgba(247, 248, 255, 0.96), rgba(238, 242, 255, 0.96)),
    #f7f8ff;
  -webkit-overflow-scrolling: touch;
}

.pdf-modal__viewer:focus-visible {
  outline: 2px solid rgba(96, 123, 255, 0.45);
  outline-offset: -2px;
}

.pdf-modal__status {
  position: sticky;
  top: 0;
  z-index: 1;
  min-height: 40px;
  padding: 10px 18px;
  color: rgba(20, 22, 67, 0.62);
  font-size: 13px;
  font-weight: 700;
  line-height: 1.4;
  text-align: center;
  background: rgba(247, 248, 255, 0.88);
  border-bottom: 1px solid rgba(96, 123, 255, 0.1);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.pdf-modal__status:empty {
  display: none;
}

.pdf-modal__pages {
  display: grid;
  gap: 18px;
  justify-items: center;
  padding: 18px;
}

.pdf-page {
  display: grid;
  place-items: center;
  width: min(920px, 100%);
  min-height: 220px;
  padding: 12px;
  border: 1px solid rgba(96, 123, 255, 0.12);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.82);
  color: rgba(20, 22, 67, 0.48);
  font-size: 13px;
  font-weight: 700;
  box-shadow: 0 10px 28px rgba(33, 43, 112, 0.1);
}

.pdf-page canvas {
  display: block;
  max-width: 100%;
  height: auto;
  border-radius: 4px;
  background: #fff;
}

.pdf-page.is-rendering {
  min-height: 320px;
}

.pdf-page.is-error {
  border-color: rgba(255, 92, 150, 0.22);
  color: rgba(156, 43, 83, 0.72);
}

.demo-form label {
  display: grid;
  gap: 8px;
  color: var(--text);
  font-size: 14px;
  font-weight: 700;
}

.demo-form input {
  width: 100%;
  height: 48px;
  border: 1px solid rgba(96, 123, 255, 0.16);
  border-radius: 16px;
  padding: 0 14px;
  color: var(--text);
  background: rgba(255, 255, 255, 0.76);
  font: inherit;
  outline: none;
}

.demo-form input:focus {
  border-color: rgba(96, 123, 255, 0.48);
  box-shadow: 0 0 0 4px rgba(96, 123, 255, 0.1);
}

.demo-form .btn {
  margin-top: 4px;
}

.demo-form__status {
  min-height: 22px;
  color: var(--primary);
  font-weight: 600;
}

@keyframes cardBorderOrbit {
  to {
    --border-angle: 360deg;
  }
}

@keyframes skeletonSweep {
  to {
    transform: translateX(120%);
  }
}

@keyframes sectionItemEnter {
  from {
    opacity: 0;
    translate: 0 18px;
    scale: 0.985;
    filter: blur(8px);
  }

  to {
    opacity: 1;
    translate: 0 0;
    scale: 1;
    filter: blur(0);
  }
}

@keyframes metricValuePop {
  0% {
    opacity: 0;
    scale: 0.92;
    filter: blur(4px);
  }

  68% {
    scale: 1.035;
  }

  100% {
    opacity: 1;
    scale: 1;
    filter: blur(0);
  }
}

@keyframes metricAssetLift {
  0% {
    opacity: 0;
    translate: 0 8px;
    scale: 0.96;
    filter: blur(5px);
  }

  100% {
    opacity: 1;
    translate: 0 0;
    scale: 1;
    filter: blur(0);
  }
}

@keyframes painIconPop {
  0% {
    opacity: 0;
    scale: 0.92;
    filter: blur(4px);
  }

  100% {
    opacity: 1;
    scale: 1;
    filter: blur(0);
  }
}

@keyframes architectureCoreEnter {
  0% {
    opacity: 0;
    translate: 0 18px;
    scale: 0.94;
    filter: blur(10px);
  }

  70% {
    scale: 1.025;
  }

  100% {
    opacity: 1;
    translate: 0 0;
    scale: 1;
    filter: blur(0);
  }
}

@keyframes architectureOrbitWake {
  0% {
    scale: 0.96;
    filter: blur(4px);
  }

  100% {
    scale: 1;
    filter: blur(0);
  }
}

@keyframes timelineLineDraw {
  from {
    scale: 0 1;
  }

  to {
    scale: 1 1;
  }
}

@keyframes finalPanelEnter {
  0% {
    opacity: 0;
    translate: 0 18px;
    scale: 0.985;
    filter: blur(8px);
    background-position: 0% 50%, 0% 50%, 100% 50%;
  }

  100% {
    opacity: 1;
    translate: 0 0;
    scale: 1;
    filter: blur(0);
    background-position: 100% 50%, 100% 50%, 0% 50%;
  }
}

@keyframes heroEnter {
  from {
    opacity: 0;
    translate: 0 14px;
    filter: blur(8px);
  }

  to {
    opacity: 1;
    translate: 0 0;
    filter: blur(0);
  }
}

@keyframes heroTitleSweep {
  0% {
    background-position: 0% 50%;
  }

  100% {
    background-position: 100% 50%;
  }
}

@keyframes miniOrbitSpin {
  to {
    rotate: 360deg;
  }
}

@keyframes heroVisualEnter {
  from {
    opacity: 0;
    scale: 0.985;
    filter: blur(10px);
  }

  to {
    opacity: 1;
    scale: 1;
    filter: blur(0);
  }
}

@keyframes heroVisualFloat {
  0%,
  100% {
    translate: 0 0;
  }

  50% {
    translate: 0 -8px;
  }
}

@keyframes heroGlowPulse {
  0%,
  100% {
    opacity: 0.82;
    scale: 1;
  }

  50% {
    opacity: 1;
    scale: 1.03;
  }
}

@keyframes staticHeroPosterFloat {
  0%,
  100% {
    transform: translate3d(0, 0, 0) scale(1);
  }

  50% {
    transform: translate3d(0, -6px, 0) scale(1.018);
  }
}

@keyframes staticHeroHaloSpin {
  to {
    transform: rotate(360deg);
  }
}

@keyframes orbitPulse {
  0%,
  100% {
    opacity: 0.72;
  }

  50% {
    opacity: 1;
  }
}

@keyframes orbPulse {
  0%,
  100% {
    opacity: 0.74;
    scale: 1;
  }

  50% {
    opacity: 1;
    scale: 1.18;
  }
}

/*
  漂浮动画用合成属性 transform 而非 margin-top。margin-top 会逐帧触发重排（主线程、非合成），
  叠加气泡的 backdrop-filter 后，图标、文字、背景不在同一帧同步重绘，图标看起来比文字慢半拍。
  改用 transform 后整个气泡作为单个合成层整体移动，内部图标/文字完全同步。
  transform 与入场动画使用的 translate/scale（独立属性）可叠加合成，不冲突。
*/
@keyframes agentBubbleFloat {
  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-5px);
  }
}

@media (max-width: 1280px) {
  .tag-bim {
    right: 0;
  }

  .tag-wechat {
    right: 0;
  }
}

@media (min-width: 861px) and (max-width: 980px) {
  .nav-shell {
    width: min(100% - 28px, var(--max));
    padding: 0 16px;
    gap: 14px;
  }

  .brand-logo {
    width: 132px;
  }

  .nav-links {
    gap: 18px;
    font-size: 13px;
  }

  .nav-cta {
    min-height: 44px;
    padding: 0 18px;
    font-size: 13px;
  }
}

@media (max-width: 1180px) {
  .container {
    width: min(100% - 40px, var(--max));
  }

  .nav-shell {
    min-height: 64px;
  }

  .nav-links {
    gap: 32px;
  }

  .hero-grid,
  .architecture-grid,
  .case-card,
  .whitepaper-grid,
  .final-cta {
    grid-template-columns: 1fr;
  }

  .hero-grid {
    min-height: auto;
    gap: 28px;
  }

  .hero-copy {
    text-align: center;
  }

  .hero-copy p {
    margin: 0 auto;
  }

  .actions {
    justify-content: center;
  }

  .hero-frame {
    min-height: 500px;
  }

  .hero-media {
    width: min(78vw, 520px);
  }

  .tag-bim {
    right: 2%;
  }

  .tag-wechat {
    right: 3%;
  }

  .metric-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .case-card,
  .whitepaper-panel {
    padding: 32px;
  }

  .case-image {
    width: min(100%, 520px);
    justify-self: center;
  }

  .paper-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .books-asset {
    overflow: hidden;
  }

  .books-asset img {
    left: 50%;
    width: min(96%, 640px);
    object-position: center bottom;
    transform: translateX(-50%);
  }

}

@media (min-width: 861px) and (max-width: 1180px) {
  .architecture-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .architecture-visual {
    min-height: 520px;
  }

  .layer-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }

  .layer-card {
    min-height: 112px;
    padding: 20px;
    grid-template-columns: 50px minmax(0, 1fr);
    align-items: center;
  }

  .layer-card:last-child {
    grid-column: 1 / -1;
    min-height: 104px;
  }

  .case-card {
    grid-template-columns: minmax(260px, 0.72fr) minmax(0, 1fr);
    gap: 24px;
    align-items: center;
    padding: 28px;
  }

  .case-image {
    width: 100%;
    max-width: 420px;
    justify-self: start;
    align-self: center;
  }

  .case-content {
    padding-top: 0;
  }

  .case-heading h3 {
    font-size: clamp(22px, 2.4vw, 28px);
  }

  .case-content > p {
    font-size: 14px;
    line-height: 1.55;
  }

  .case-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 10px;
    margin: 16px 0 20px;
  }

  .timeline {
    overflow-x: auto;
    overflow-y: hidden;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
  }

  .timeline::-webkit-scrollbar {
    display: none;
  }

  .final-cta {
    grid-template-columns: minmax(0, 1fr) minmax(280px, 0.78fr);
    align-items: center;
    gap: 28px;
    padding: 28px 42px;
    text-align: left;
  }

  .final-cta .actions {
    justify-content: flex-start;
  }

  .city-asset {
    width: min(100%, 360px);
    height: 180px;
    justify-self: end;
  }

  .footer-grid {
    grid-template-columns:
      minmax(220px, 1.35fr)
      repeat(4, minmax(78px, 0.55fr))
      minmax(188px, 0.9fr);
    gap: 18px;
  }

  .footer-brand {
    grid-column: auto;
  }

  .footer-brand p {
    max-width: 300px;
  }

  .footer-link-list {
    gap: 10px;
  }
}

@media (min-width: 861px) and (max-width: 1280px) {
  .footer-grid {
    grid-template-columns:
      minmax(220px, 1.35fr)
      repeat(4, minmax(78px, 0.55fr))
      minmax(188px, 0.9fr);
    gap: 18px;
  }

  .footer-brand {
    grid-column: auto;
  }

  .footer-brand p {
    max-width: 300px;
  }

  .footer-link-list {
    gap: 10px;
  }
}

@media (max-width: 860px) {
  html {
    scroll-padding-top: 80px;
  }

  .site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    padding: 8px 0 8px;
    background: rgba(246, 248, 255, 0.84);
    -webkit-backdrop-filter: blur(14px);
    backdrop-filter: blur(14px);
  }

  .site-header.is-scrolled {
    padding: 8px 0 8px;
  }

  .nav-shell {
    grid-template-columns: auto auto;
    grid-template-rows: 58px auto;
    min-height: 58px;
    padding: 0 16px;
    column-gap: 16px;
    row-gap: 0;
    border-radius: 30px;
  }

  .brand-logo {
    width: 132px;
  }

  main {
    padding-top: 82px;
  }

  .menu-toggle {
    display: block;
    justify-self: end;
  }

  .nav-cta {
    display: none;
  }

  .nav-links {
    grid-column: 1 / -1;
    width: 100%;
    overflow: hidden;
    display: none;
    justify-items: start;
    gap: 0;
    border-top: 1px solid rgba(96, 125, 182, 0.12);
  }

  .nav-links a {
    width: 100%;
    padding: 12px 6px;
    border-radius: 0;
    border-top: 0;
    border-bottom: 1px solid rgba(96, 125, 182, 0.12);
  }

  .nav-links a:not(.is-active):hover,
  .nav-links a:not(.is-active):focus-visible {
    color: var(--primary);
    background: rgba(96, 123, 255, 0.07);
    -webkit-text-fill-color: currentColor;
  }

  .nav-links a.is-active,
  .nav-links a.is-active:hover,
  .nav-links a.is-active:focus,
  .nav-links a.is-active:focus-visible {
    color: var(--primary-deep);
    background: transparent;
    background-clip: initial;
    -webkit-background-clip: initial;
    -webkit-text-fill-color: currentColor;
  }

  .nav-links a::after {
    left: 0;
    bottom: 50%;
    width: 3px;
    height: 18px;
    transform: translateY(50%) scaleY(0.4);
  }

  .nav-links a.is-active::after {
    transform: translateY(50%) scaleY(1);
  }

  .nav-shell.is-open .nav-links {
    display: grid;
    max-height: 260px;
  }

  .hero {
    padding-top: 18px;
  }

  .hero h1 {
    margin-top: 28px;
    font-size: clamp(36px, 9vw, 50px);
  }

  .hero p {
    font-size: 15px;
  }

  .hero-frame {
    min-height: 420px;
  }

  .hero-media {
    width: min(82vw, 430px);
  }

  .agent-tag {
    min-height: 38px;
    padding: 0 12px;
    font-size: 12px;
  }

  .agent-tag .line-icon {
    width: 24px;
    height: 24px;
    transform: scale(0.72);
  }

  .pain-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }

  .pain-card {
    min-height: 340px;
  }

  .pain-card-head {
    margin: -28px -24px 0;
    height: 112px;
    padding: 22px 24px 14px;
  }

  .pain-scene img {
    object-position: center 48%;
    transform: none;
  }

  .tag-procurement { top: 10%; left: 8%; }
  .tag-bim { top: 24%; right: 0; }
  .tag-weighing { top: 42%; left: 0; }
  .tag-finance { bottom: 14%; left: 4%; }
  .tag-wechat { bottom: 14%; right: 2%; }

  .section-title {
    margin: 44px 0 22px;
  }

  .metric-card {
    grid-template-columns: 1fr;
  }

  .module-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .module-card {
    min-height: 316px;
  }

  .module-asset {
    width: 136px;
    height: 108px;
  }

  .module-asset img {
    width: 136px;
    height: 136px;
  }

  .architecture-visual {
    min-height: 480px;
  }

  .architecture-visual > picture {
    width: min(96%, 580px);
  }

  .layer-card {
    grid-template-columns: 48px 1fr;
    padding: 18px;
  }

  .layer-icon {
    width: 42px;
    height: 42px;
  }

  .case-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .timeline {
    --timeline-center: 50%;
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
    overflow: visible;
    padding: 4px 0;
  }

  .timeline li {
    display: grid;
    grid-template-columns: 1fr;
    align-items: center;
    gap: 2px;
    position: relative;
    width: calc(50% - 24px);
    min-width: 0;
    min-height: 54px;
    padding: 9px 10px;
    border: 1px solid var(--glass-line);
    border-radius: 14px;
    background: var(--surface-medium);
    box-shadow: var(--soft-shadow);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
  }

  .timeline li:nth-child(odd) {
    justify-self: start;
    text-align: right;
  }

  .timeline li:nth-child(even) {
    justify-self: end;
    text-align: left;
  }

  .timeline::before {
    display: block;
    top: 0;
    bottom: 0;
    left: var(--timeline-center);
    right: auto;
    width: 2px;
    height: auto;
    transform: translateX(-50%);
  }

  .timeline span {
    position: absolute;
    top: 50%;
    width: 22px;
    height: 22px;
    transform: translateY(-50%);
    border-width: 3px;
  }

  .timeline li:nth-child(odd) span {
    left: auto;
    right: -35px;
  }

  .timeline li:nth-child(even) span {
    left: -35px;
    right: auto;
  }

  .timeline small {
    margin-top: 14px;
  }

  .whitepaper-panel {
    padding: 26px;
  }

  .paper-cards {
    grid-template-columns: 1fr;
  }

  .books-asset {
    height: 390px;
  }

  .final-cta {
    gap: 10px;
    padding: 42px 24px 22px;
    text-align: center;
  }

  .city-asset {
    justify-self: center;
    margin-top: -8px;
  }

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 621px) and (max-width: 860px) {
  .metrics-section,
  .architecture-section,
  .modules-section,
  .case-section,
  .whitepaper-section,
  .final-section {
    padding-top: 0;
    padding-bottom: 64px;
  }

  .section-title {
    margin: 64px 0 24px;
    font-size: clamp(30px, 5.8vw, 40px);
    line-height: 1.16;
  }

  .section-title .title-line {
    display: block;
  }

  .section-title .title-punct {
    display: none;
  }

  .architecture-section .section-title,
  .modules-section .section-title,
  .case-section .section-title {
    margin-top: 0;
  }

  .architecture-section .section-title {
    margin-bottom: 8px;
    padding: 0 10px;
    font-size: clamp(24px, 7vw, 30px);
    overflow-wrap: anywhere;
  }

  .layer-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }

  .layer-card {
    min-height: 118px;
    padding: 18px;
    grid-template-columns: 46px minmax(0, 1fr);
    align-items: center;
  }

  .layer-card:last-child {
    grid-column: 1 / -1;
    min-height: 104px;
  }

  .module-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }

  .module-card {
    min-height: 0;
    padding: 22px 18px 20px;
  }

  .module-card h3 {
    margin-bottom: 8px;
    text-align: left;
    white-space: normal;
    font-size: 16px;
  }

  .module-asset {
    width: 118px;
    height: 92px;
    margin: 4px 0 12px;
  }

  .module-asset img {
    width: 118px;
    height: 118px;
    transform: translateY(-12px);
  }

  .module-card ul {
    gap: 7px;
  }

  .module-card li {
    white-space: normal;
  }

  .module-card > a {
    margin-top: 14px;
  }

  .module-card:first-child {
    display: grid;
    grid-column: 1 / -1;
    grid-template-columns: minmax(0, 1fr) 172px;
    grid-template-areas:
      "title media"
      "list media"
      "link media";
    column-gap: 22px;
    align-items: center;
    border-color: rgba(96, 123, 255, 0.2);
    background:
      radial-gradient(circle at 82% 50%, rgba(96, 165, 255, 0.18), transparent 34%),
      linear-gradient(135deg, rgba(255, 255, 255, 0.96) 0%, rgba(246, 250, 255, 0.92) 48%, rgba(233, 242, 255, 0.9) 100%);
    box-shadow:
      0 24px 58px rgba(96, 123, 255, 0.13),
      inset 0 0 0 1px rgba(255, 255, 255, 0.72);
    padding: 24px;
  }

  .module-card:first-child h3 {
    grid-area: title;
    color: var(--primary-deep);
    font-size: 18px;
    margin: 0 0 8px;
  }

  .module-card:first-child .module-asset {
    grid-area: media;
    justify-self: end;
    width: 166px;
    height: 136px;
    margin: 0;
  }

  .module-card:first-child .module-asset img {
    width: 166px;
    height: 166px;
    transform: translateY(-16px);
  }

  .module-card:first-child ul {
    grid-area: list;
  }

  .module-card:first-child > a {
    grid-area: link;
  }

  .case-card {
    grid-template-columns: 176px minmax(0, 1fr);
    grid-template-areas:
      "image heading"
      "image summary"
      "stats stats"
      "timeline timeline";
    align-items: center;
    gap: 16px 20px;
    padding: 24px;
  }

  .case-image {
    grid-area: image;
    width: 176px;
    align-self: center;
    border-radius: 18px;
  }

  .case-content {
    display: contents;
    padding-top: 0;
  }

  .case-heading {
    grid-area: heading;
    gap: 10px;
  }

  .case-heading h3 {
    font-size: 22px;
  }

  .case-content > p {
    grid-area: summary;
    margin: -4px 0 0;
    font-size: 14px;
    line-height: 1.5;
  }

  .case-content > p + p {
    display: none;
  }

  .case-stats {
    grid-area: stats;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin: 6px 0 0;
  }

  .timeline {
    --mobile-timeline-step: 112px;
    grid-area: timeline;
    display: grid;
    grid-template-columns: repeat(6, var(--mobile-timeline-step));
    gap: 0;
    width: 100%;
    margin-top: 18px;
    padding: 0 0 4px;
    overflow-x: auto;
    overflow-y: hidden;
    scroll-snap-type: x proximity;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
  }

  .timeline::-webkit-scrollbar {
    display: none;
  }

  .timeline::before {
    display: block;
    top: 9px;
    left: calc(var(--mobile-timeline-step) / 2);
    right: auto;
    width: calc(var(--mobile-timeline-step) * 5);
    height: 2px;
    transform: none;
  }

  .timeline li,
  .timeline li:nth-child(odd),
  .timeline li:nth-child(even) {
    display: block;
    position: relative;
    justify-self: auto;
    width: 100%;
    min-height: 0;
    padding: 26px 6px 0;
    border: 0;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
    text-align: center;
    scroll-snap-align: start;
  }

  .timeline li::after {
    display: none;
  }

  .timeline span,
  .timeline li:nth-child(odd) span,
  .timeline li:nth-child(even) span {
    position: absolute;
    top: 0;
    left: 50%;
    width: 18px;
    height: 18px;
    margin: 0;
    transform: translateX(-50%);
    border: 3px solid transparent;
    background:
      linear-gradient(#fff, #fff) padding-box,
      linear-gradient(135deg, var(--primary-deep), var(--primary)) border-box;
  }

  .timeline b {
    white-space: nowrap;
  }

  .timeline small {
    margin-top: 4px;
  }

  .whitepaper-head {
    text-align: center;
  }

  .whitepaper-panel {
    padding: 28px 24px 26px;
  }

  .whitepaper-grid {
    gap: 20px;
  }

  .books-asset {
    height: min(46vw, 320px);
    overflow: hidden;
  }

  .books-asset::before {
    inset: -34px -24px -38px;
    opacity: 0.46;
  }

  .books-asset::after {
    bottom: 14px;
    opacity: 0.6;
  }

  .books-asset img {
    left: 50%;
    bottom: -10px;
    width: min(96%, 520px);
    height: 106%;
    object-position: center bottom;
    transform: translateX(-50%);
  }

  .paper-cards {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
    margin: 0;
    overflow: visible;
    padding: 0;
    scroll-snap-type: none;
  }

  .paper-card {
    min-height: 210px;
    padding: 18px;
  }

  .paper-body {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 14px;
  }

  .paper-preview {
    width: 96px;
    height: 116px;
    min-height: 116px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .footer-brand {
    grid-column: 1 / -1;
    padding-bottom: 18px;
  }

  .footer-brand,
  .footer-col {
    text-align: left;
  }

  .footer-col {
    border-top: 1px solid rgba(84, 94, 122, 0.14);
    gap: 0;
  }

  .footer-col summary {
    align-items: center;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    min-height: 48px;
    pointer-events: auto;
  }

  .footer-col summary::after {
    color: var(--soft);
    content: "+";
    font-size: 18px;
    line-height: 1;
    transition: transform 160ms ease;
  }

  .footer-col[open] summary::after {
    transform: rotate(45deg);
  }

  .footer-col summary span {
    margin: 0;
  }

  .footer-link-list {
    gap: 9px;
    padding: 0 0 16px;
  }
}

@media (max-width: 620px) {
  :root {
    --mobile-section-gap: 64px;
    --mobile-title-gap: 64px;
    --mobile-title-after: 22px;
  }

  .container {
    width: min(100% - 28px, var(--max));
  }

  .metrics-section,
  .architecture-section,
  .modules-section,
  .case-section,
  .whitepaper-section,
  .final-section {
    padding-top: 0;
    padding-bottom: var(--mobile-section-gap);
  }

  .section-title {
    font-size: clamp(26px, 8vw, 32px);
    line-height: 1.18;
    margin: var(--mobile-title-gap) 0 var(--mobile-title-after);
  }

  .section-title .title-line {
    display: block;
  }

  .section-title .title-punct {
    display: none;
  }

  .architecture-section .section-title,
  .modules-section .section-title,
  .case-section .section-title {
    margin-top: 0;
  }

  .architecture-section .section-title {
    margin-bottom: 8px;
    max-width: min(100%, 390px);
    margin-left: auto;
    margin-right: auto;
    padding: 0 18px;
    font-size: clamp(22px, 6.4vw, 28px);
    line-height: 1.22;
    overflow-wrap: anywhere;
  }

  .hero {
    padding-bottom: 38px;
  }

  .hero h1 {
    font-size: clamp(32px, 10vw, 42px);
  }

  .hero h1 > .hero-line {
    font-size: clamp(23px, 6.2vw, 30px);
  }

  .actions,
  .paper-actions {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    width: 100%;
  }

  .btn {
    width: 100%;
    min-height: 44px;
    padding: 0 12px;
    gap: 7px;
    font-size: 13px;
  }

  .btn .icon-arrow {
    width: 16px;
    height: 16px;
  }

  .hero-frame {
    min-height: 390px;
  }

  .hero-frame > img,
  .architecture-visual > img {
    width: 100%;
  }

  .hero-media {
    width: min(72vw, 292px);
  }

  .orbit {
    inset: 16% 8%;
  }

  .orbit-two {
    inset: 24% 16%;
  }

  .hero-frame .agent-tag {
    display: inline-flex;
    max-width: calc(50% - 10px);
    min-height: 38px;
    padding: 7px 10px;
    gap: 6px;
    white-space: normal;
    text-align: left;
    font-size: 11.5px;
    line-height: 1.18;
  }

  .hero-frame .agent-tag .line-icon {
    width: 18px;
    height: 18px;
  }

  .tag-procurement {
    top: 0;
    left: 50%;
    transform: translateX(-50%);
  }

  .tag-bim {
    top: 23%;
    right: 0;
  }

  .tag-weighing {
    top: 43%;
    left: 0;
  }

  .tag-finance {
    bottom: 10%;
    left: 0;
  }

  .tag-wechat {
    bottom: 10%;
    right: 0;
  }

  .metric-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }

  .metric-card {
    position: relative;
    min-height: 0;
    padding: 18px 16px 16px;
    display: block;
  }

  .metric-card > div:first-child {
    display: flex;
    flex-direction: column;
  }

  .metric-card h3 {
    padding-right: 78px;
    font-size: 14px;
    line-height: 1.25;
  }

  .metric-card strong {
    padding-right: 78px;
    margin-top: 9px;
    font-size: 32px;
  }

  .metric-card strong span {
    font-size: 17px;
  }

  .metric-card .metric-cycle-value {
    font-size: 25px;
  }

  .metric-card p {
    margin-top: 16px;
    padding-top: 0;
    font-size: 13px;
    line-height: 1.42;
  }

  .mini-asset {
    position: absolute;
    top: 14px;
    right: 12px;
    width: 70px;
    height: 62px;
    opacity: 0.96;
  }

  .pain-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }

  .pain-card {
    min-height: 260px;
    padding: 18px 14px 0;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 0;
  }

  .pain-card-head {
    max-width: none;
    margin: -18px -14px 0;
    height: 96px;
    padding: 20px 16px 14px;
    border-radius: var(--radius-md) var(--radius-md) 16px 16px;
  }

  .pain-card h3 {
    font-size: 15px;
    margin-bottom: 6px;
  }

  .pain-card p {
    font-size: 12px;
    line-height: 1.5;
  }

  .pain-card::before {
    background:
      linear-gradient(180deg, rgba(255, 255, 255, 0.22) 0%, rgba(255, 255, 255, 0.04) 42%, rgba(255, 255, 255, 0) 72%),
      linear-gradient(90deg, rgba(255, 255, 255, 0.22), rgba(255, 255, 255, 0.04) 62%, rgba(255, 255, 255, 0.14));
  }

  .pain-scene {
    width: 100%;
    inset: 0;
    margin: 0;
  }

  .pain-scene img {
    opacity: 0.92;
    transform: translateY(12px) scale(1.08);
    transform-origin: center bottom;
  }

  .case-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .module-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
    margin: 0;
    overflow: visible;
    padding: 0;
  }

  .module-grid::-webkit-scrollbar {
    display: none;
  }

  .module-card {
    min-width: 0;
    min-height: 0;
    padding: 18px 14px 16px;
    scroll-snap-align: none;
  }

  .module-card h3 {
    font-size: 15px;
    line-height: 1.24;
    white-space: normal;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .footer-brand {
    grid-column: 1 / -1;
    padding-bottom: 18px;
  }

  .metric-card,
  .pain-card,
  .module-card,
  .case-card,
  .whitepaper-panel,
  .final-cta {
    border-radius: 20px;
  }

  .city-asset {
    height: 150px;
  }

  .architecture-grid {
    gap: 16px;
  }

  .architecture-visual {
    margin-top: -6px;
    min-height: 0;
    padding: 0;
  }

  .architecture-visual > picture {
    width: min(calc(100vw - 28px), 390px);
  }

  .agent-matrix {
    display: none;
  }

  .architecture-visual .agent-tag {
    position: relative;
    inset: auto;
    transform: none;
    display: inline-flex;
    justify-content: center;
    max-width: none;
    min-height: 34px;
    padding: 7px 12px;
    gap: 0;
    white-space: nowrap;
    text-align: center;
    font-size: 10.5px;
    line-height: 1.18;
  }

  .architecture-visual .agent-tag .line-icon {
    display: none;
  }

  .arch-top {
    top: auto;
    left: auto;
    transform: none;
  }

  .connector-top {
    top: 21%;
  }

  .arch-bottom {
    top: auto;
    bottom: auto;
    left: auto;
    transform: none;
  }

  .arch-left {
    top: auto;
    left: auto;
    transform: none;
  }

  .arch-right {
    top: auto;
    right: auto;
    left: auto;
    transform: none;
  }

  .arch-finance {
    top: auto;
    left: auto;
    transform: none;
  }

  .arch-wechat {
    top: auto;
    right: auto;
    left: 72%;
    left: auto;
    transform: none;
  }

  .connector-bottom {
    top: 74%;
  }

  .connector-bottom::after {
    --connector-height: 36px;
  }

  .layer-list {
    gap: 12px;
  }

  .layer-card {
    min-height: 0;
    padding: 14px;
    grid-template-columns: 42px 1fr;
    gap: 12px;
    border-radius: 18px;
  }

  .layer-icon {
    width: 38px;
    height: 38px;
  }

  .layer-card h3 {
    font-size: 14px;
  }

  .layer-card p {
    font-size: 13px;
    line-height: 1.45;
  }

  .case-card {
    display: grid;
    grid-template-columns: 96px minmax(0, 1fr);
    grid-template-areas:
      "image heading"
      "image summary"
      "stats stats"
      "timeline timeline";
    align-items: start;
    gap: 12px 14px;
    padding: 16px;
  }

  .case-image {
    grid-area: image;
    width: 100%;
    min-height: 0;
    height: 104px;
    aspect-ratio: 1;
    align-self: start;
    border-radius: 14px;
  }

  .case-image img {
    object-position: center 44%;
  }

  .case-heading h3 {
    font-size: 17px;
  }

  .case-heading span {
    padding: 4px 8px;
    border-radius: 8px;
    font-size: 11px;
  }

  .case-content {
    display: contents;
    padding-top: 0;
  }

  .case-heading {
    grid-area: heading;
    gap: 8px;
    transform: translateY(-4px);
  }

  .case-content > p {
    grid-area: summary;
    margin: -10px 0 0;
    font-size: 13px;
    line-height: 1.45;
    transform: translateY(-4px);
  }

  .case-content > p + p {
    display: none;
  }

  .case-stats {
    grid-area: stats;
    gap: 8px;
    margin: 2px 0 0;
  }

  .case-stats div {
    min-height: 0;
    padding: 8px 7px;
    border-radius: 14px;
  }

  .case-stats span,
  .case-stats small {
    font-size: 11px;
    line-height: 1.25;
  }

  .case-stats strong {
    margin: 3px 0;
    font-size: 17px;
  }

  .demo-modal {
    align-items: end;
    padding: 14px;
  }

  .demo-modal__dialog {
    width: 100%;
    max-height: calc(100vh - 28px);
    overflow-y: auto;
    padding: 24px 18px 20px;
    border-radius: 24px;
  }

  .demo-modal__head {
    padding-right: 42px;
  }

  .demo-modal__head h2 {
    font-size: 22px;
  }

  .demo-form {
    gap: 12px;
  }

  .pdf-modal {
    align-items: stretch;
    padding: 10px;
  }

  .pdf-modal__dialog {
    width: 100%;
    height: calc(100dvh - 20px);
    border-radius: 18px;
  }

  .pdf-modal__bar {
    grid-template-columns: minmax(0, 1fr) auto;
    min-height: 58px;
    padding: 10px 10px 10px 14px;
    gap: 10px;
  }

  .pdf-modal__bar h2 {
    font-size: 14px;
  }

  .pdf-modal__actions {
    gap: 8px;
  }

  .pdf-modal__actions .btn {
    width: auto;
    min-height: 38px;
    padding: 0 12px;
    font-size: 12px;
  }

  .pdf-modal__close {
    width: 36px;
    height: 36px;
  }

  .pdf-modal__status {
    min-height: 36px;
    padding: 9px 12px;
    font-size: 12px;
  }

  .pdf-modal__pages {
    gap: 12px;
    padding: 12px 8px 18px;
  }

  .pdf-page {
    min-height: 180px;
    padding: 7px;
    border-radius: 10px;
  }

  .timeline {
    --mobile-timeline-step: 92px;
    grid-area: timeline;
    display: grid;
    grid-template-columns: repeat(6, var(--mobile-timeline-step));
    gap: 0;
    width: 100%;
    margin-top: 14px;
    padding: 0 0 4px;
    overflow-x: auto;
    overflow-y: hidden;
    scroll-snap-type: x proximity;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
  }

  .timeline::-webkit-scrollbar {
    display: none;
  }

  .timeline::before {
    display: block;
    top: 9px;
    left: calc(var(--mobile-timeline-step) / 2);
    right: auto;
    width: calc(var(--mobile-timeline-step) * 5);
    height: 2px;
    transform: none;
  }

  .timeline li,
  .timeline li:nth-child(odd),
  .timeline li:nth-child(even) {
    display: block;
    position: relative;
    justify-self: auto;
    width: 100%;
    min-height: 0;
    padding: 25px 4px 0;
    border: 0;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
    text-align: center;
    scroll-snap-align: start;
  }

  .timeline li::after {
    display: none;
  }

  .timeline span,
  .timeline li:nth-child(odd) span,
  .timeline li:nth-child(even) span {
    position: absolute;
    top: 0;
    left: 50%;
    display: block;
    width: 18px;
    height: 18px;
    margin: 0;
    transform: translateX(-50%);
    border: 3px solid transparent;
    background:
      linear-gradient(#fff, #fff) padding-box,
      linear-gradient(135deg, var(--primary-deep), var(--primary)) border-box;
    box-shadow: 0 0 0 3px rgba(129, 111, 255, 0.05);
  }

  .timeline b {
    display: block;
    min-width: 0;
    font-size: 11px;
    line-height: 1.2;
    white-space: nowrap;
  }

  .timeline small {
    display: block;
    margin-top: 3px;
    font-size: 11px;
    line-height: 1.1;
  }

  .module-card {
    min-height: 0;
    padding: 18px 14px 16px;
  }

  .module-card h3 {
    margin-bottom: 8px;
    text-align: left;
    white-space: normal;
    font-size: 15px;
  }

  .module-asset {
    width: 100px;
    height: 78px;
    margin: 4px 0 10px;
  }

  .module-asset img {
    width: 100px;
    height: 100px;
    transform: translateY(-12px);
  }

  .module-card ul {
    gap: 6px;
    padding-left: 13px;
  }

  .module-card li {
    font-size: 12px;
    line-height: 1.38;
    white-space: normal;
  }

  .module-card > a {
    margin-top: 12px;
    font-size: 13px;
  }

  .module-card:first-child {
    display: grid;
    grid-column: 1 / -1;
    grid-template-columns: minmax(0, 1fr) 118px;
    grid-template-areas:
      "title media"
      "list media"
      "link media";
    column-gap: 14px;
    align-items: center;
    border-color: rgba(96, 123, 255, 0.22);
    background:
      radial-gradient(circle at 84% 52%, rgba(96, 165, 255, 0.18), transparent 36%),
      linear-gradient(135deg, rgba(255, 255, 255, 0.97) 0%, rgba(246, 250, 255, 0.94) 45%, rgba(232, 242, 255, 0.92) 100%);
    box-shadow:
      0 22px 48px rgba(96, 123, 255, 0.14),
      inset 0 0 0 1px rgba(255, 255, 255, 0.72);
    padding: 20px 18px;
  }

  .module-card:first-child h3 {
    grid-area: title;
    color: var(--primary-deep);
    font-size: 16px;
    margin: 0 0 8px;
  }

  .module-card:first-child .module-asset {
    grid-area: media;
    justify-self: end;
    width: 124px;
    height: 104px;
    margin: 0;
  }

  .module-card:first-child .module-asset img {
    width: 124px;
    height: 124px;
    transform: translateY(-10px);
  }

  .module-card:first-child ul {
    grid-area: list;
  }

  .module-card:first-child > a {
    grid-area: link;
  }

  .whitepaper-head {
    text-align: center;
  }

  .whitepaper-head p {
    margin-left: auto;
    margin-right: auto;
    max-width: 28em;
  }

  .whitepaper-panel {
    padding: 20px 16px 18px;
  }

  .whitepaper-grid {
    gap: 18px;
  }

  .books-asset {
    height: min(64vw, 260px);
  }

  .books-asset::before {
    inset: -28px -18px -32px;
    opacity: 0.42;
  }

  .books-asset::after {
    bottom: 12px;
    height: 58px;
    opacity: 0.56;
  }

  .books-asset img {
    left: 50%;
    bottom: -8px;
    width: min(112%, 340px);
    height: 108%;
    object-position: center bottom;
    transform: translateX(-50%);
  }

  .paper-cards {
    display: grid;
    grid-template-columns: 1fr;
    gap: 10px;
    margin: 0;
    overflow: visible;
    padding: 0;
    scroll-padding-left: 0;
    scroll-snap-type: none;
  }

  .paper-card {
    flex: none;
    display: grid;
    row-gap: 10px;
    min-height: auto;
    padding: 16px;
    border-radius: 16px;
    scroll-snap-align: none;
  }

  .paper-body {
    grid-template-columns: 78px minmax(0, 1fr);
    gap: 12px;
    padding-right: 28px;
  }

  .paper-copy {
    gap: 4px;
  }

  .paper-card h3 {
    margin-right: 30px;
    padding-top: 0;
    font-size: 15px;
  }

  .paper-card p {
    margin-bottom: 6px;
    font-size: 12px;
    line-height: 1.45;
  }

  .paper-preview {
    display: grid;
    width: 78px;
    min-height: 96px;
    height: 96px;
    align-self: start;
    margin: 0;
    border-radius: 12px;
  }

  .paper-actions {
    margin-top: 8px;
  }

  .paper-actions .btn {
    min-height: 38px;
    font-size: 12px;
  }

  .footer-brand,
  .footer-col {
    text-align: left;
  }

  .footer-col {
    border-top: 1px solid rgba(84, 94, 122, 0.14);
    gap: 0;
  }

  .footer-col summary {
    align-items: center;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    min-height: 48px;
    pointer-events: auto;
  }

  .footer-col summary::after {
    color: var(--soft);
    content: "+";
    font-size: 18px;
    line-height: 1;
    transition: transform 160ms ease;
  }

  .footer-col[open] summary::after {
    transform: rotate(45deg);
  }

  .footer-col summary span {
    margin: 0;
    font-size: 14px;
  }

  .footer-link-list {
    gap: 9px;
    padding: 0 0 16px;
  }

  .footer-col a,
  .footer-col p {
    font-size: 12px;
    line-height: 1.42;
  }

}

@media (hover: none) {
  .interactive-card:hover {
    translate: 0 0;
  }
}

.no-individual-transform .hero-copy > *,
.no-individual-transform .hero .actions .btn,
.no-individual-transform .hero-frame .hero-media,
.no-individual-transform .hero-frame .agent-tag,
.no-individual-transform .metrics-section.motion-ready .metric-card,
.no-individual-transform .metrics-section.motion-ready .section-title,
.no-individual-transform .metrics-section.motion-ready .pain-card,
.no-individual-transform .architecture-section.motion-ready .section-title,
.no-individual-transform .architecture-section.motion-ready .architecture-core-logo,
.no-individual-transform .architecture-section.motion-ready .architecture-visual .agent-tag,
.no-individual-transform .architecture-section.motion-ready .layer-list,
.no-individual-transform .modules-section.motion-ready .section-title,
.no-individual-transform .modules-section.motion-ready .module-grid,
.no-individual-transform .case-section.motion-ready .section-title,
.no-individual-transform .case-section.motion-ready .case-card,
.no-individual-transform .whitepaper-section.motion-ready .whitepaper-head,
.no-individual-transform .whitepaper-section.motion-ready .whitepaper-grid,
.no-individual-transform .final-section.motion-ready .final-cta {
  opacity: 1 !important;
  filter: none !important;
  animation: none !important;
}

@supports not (translate: 0 0) {
  .hero-copy > *,
  .hero .actions .btn,
  .hero-frame .hero-media,
  .hero-frame .agent-tag,
  .metrics-section.motion-ready .metric-card,
  .metrics-section.motion-ready .section-title,
  .metrics-section.motion-ready .pain-card,
  .architecture-section.motion-ready .section-title,
  .architecture-section.motion-ready .architecture-core-logo,
  .architecture-section.motion-ready .architecture-visual .agent-tag,
  .architecture-section.motion-ready .layer-list,
  .modules-section.motion-ready .section-title,
  .modules-section.motion-ready .module-grid,
  .case-section.motion-ready .section-title,
  .case-section.motion-ready .case-card,
  .whitepaper-section.motion-ready .whitepaper-head,
  .whitepaper-section.motion-ready .whitepaper-grid,
  .final-section.motion-ready .final-cta {
    opacity: 1 !important;
    filter: none !important;
    animation: none !important;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 1ms !important;
  }

  .interactive-card,
  .interactive-card:hover,
  .interactive-card:focus-within {
    opacity: 1;
    transform: none;
    translate: 0 0;
    scale: 1;
    filter: none;
  }

  .interactive-card::before,
  .interactive-card::after {
    display: none;
  }

  .hero-video {
    display: none;
  }

  .hero-video-poster {
    opacity: 0.94;
  }
}

/* 2026-07-20 工程大脑中枢：按五层智能架构目标稿重构 */
.architecture-section {
  padding: 18px 0 50px;
  overflow: hidden;
}

.architecture-section .container {
  width: min(var(--max), calc(100% - 56px));
}

.architecture-grid {
  display: grid;
  grid-template-columns: minmax(610px, 1.08fr) minmax(520px, 0.92fr);
  align-items: start;
  gap: 44px;
}

.architecture-overview {
  min-width: 0;
}

.architecture-intro {
  display: grid;
  justify-items: start;
}

.architecture-eyebrow {
  justify-self: center;
  min-height: 46px;
  padding: 0 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 13px;
  line-height: 1;
  font-weight: 500;
  white-space: nowrap;
  border: 1px solid var(--glass-line);
  border-radius: 999px;
  background: var(--surface-medium);
  box-shadow: var(--soft-shadow);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}

.architecture-section .section-title {
  margin: 16px 0 10px;
  max-width: 640px;
  color: var(--text);
  text-align: left;
  font-size: clamp(24px, 2.8vw, 36px);
  line-height: 1.25;
  letter-spacing: -0.02em;
  font-weight: 800;
}

.architecture-intro > p {
  margin: 0;
  max-width: 610px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.62;
}

.architecture-visual {
  min-height: 0;
  margin-top: -2px;
  padding: 0;
  overflow: visible;
}

.architecture-visual > .architecture-hub-image {
  position: relative;
  z-index: 1;
  display: block;
  width: min(100%, 560px);
  height: auto;
  margin: 0 auto;
  object-fit: contain;
  filter: drop-shadow(0 20px 34px rgba(96, 123, 255, 0.08));
}

.layer-list {
  display: grid;
  gap: 16px;
  padding-top: 50px;
}

.layer-card {
  position: relative;
  min-height: 92px;
  padding: 18px 24px;
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr) 40px;
  align-items: center;
  gap: 18px;
  overflow: hidden;
  border: 1px solid var(--glass-line);
  border-radius: var(--radius-md);
  background: var(--surface);
  box-shadow: var(--soft-shadow);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
  transition: translate 220ms ease, border-color 220ms ease, box-shadow 220ms ease;
}

.layer-card::before {
  content: "";
  position: absolute;
  inset: 12px auto 12px 0;
  width: 2px;
  border-radius: 0 999px 999px 0;
  background: linear-gradient(180deg, var(--cyan), var(--primary));
  box-shadow: 0 0 12px rgba(96, 123, 255, 0.18);
}

.layer-card:hover {
  translate: 0 -4px;
  border-color: transparent;
  box-shadow: 0 24px 56px rgba(96, 123, 255, 0.095), 0 8px 24px rgba(129, 111, 255, 0.055);
}

.layer-card.interactive-card::before {
  inset: 12px auto 12px 0;
  width: 2px;
  padding: 0;
  opacity: 1;
  background: linear-gradient(180deg, var(--cyan), var(--primary));
  -webkit-mask: none;
  mask: none;
  animation: none;
  transition: opacity 180ms ease;
}

.layer-card.interactive-card::after {
  inset: 0;
  opacity: 0;
  background: rgba(96, 123, 255, 0.1);
  transition: opacity 220ms ease;
}

.layer-card.interactive-card:hover,
.layer-card.interactive-card:focus-within,
.layer-card.interactive-card.is-pointer-active {
  border-color: transparent;
}

.layer-card.interactive-card:hover::before,
.layer-card.interactive-card:focus-within::before,
.layer-card.interactive-card.is-pointer-active::before {
  opacity: 0;
  animation: none;
}

.layer-card.interactive-card:hover::after,
.layer-card.interactive-card:focus-within::after,
.layer-card.interactive-card.is-pointer-active::after {
  opacity: 1;
}

.layer-icon {
  width: 58px;
  height: 58px;
  object-fit: contain;
}

.layer-copy {
  min-width: 0;
  display: grid;
  grid-template-columns: minmax(144px, 0.9fr) minmax(180px, 1.1fr);
  align-items: center;
}

.layer-card h3 {
  margin: 0;
  padding-right: 18px;
  color: var(--primary);
  background: none;
  -webkit-background-clip: border-box;
  background-clip: border-box;
  -webkit-text-fill-color: currentColor;
  font-size: 16px;
  line-height: 1.4;
  letter-spacing: 0;
  font-weight: 700;
  white-space: nowrap;
}

.layer-card p {
  min-height: 42px;
  padding-left: 24px;
  display: flex;
  align-items: center;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.62;
  border-left: 1px solid var(--line);
}

.layer-number {
  justify-self: end;
  color: rgba(96, 123, 255, 0.1);
  font-family: "DIN Alternate", "Bahnschrift", "Arial Narrow", sans-serif;
  font-size: 32px;
  line-height: 1;
  font-weight: 900;
  font-style: italic;
  letter-spacing: -0.05em;
}

@media (min-width: 861px) and (max-width: 1180px) {
  .architecture-section .container {
    width: min(100% - 40px, var(--max));
  }

  .architecture-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .architecture-intro {
    justify-items: center;
  }

  .architecture-section .section-title,
  .architecture-intro > p {
    margin-left: 0;
    text-align: center;
  }

  .architecture-visual > .architecture-hub-image {
    width: min(100%, 580px);
  }

  .layer-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    padding-top: 0;
  }

  .layer-card,
  .layer-card:last-child {
    min-height: 112px;
    padding: 18px;
    grid-template-columns: 48px minmax(0, 1fr) 36px;
    grid-column: auto;
  }

  .layer-card:last-child {
    grid-column: 1 / -1;
  }

  .layer-icon {
    width: 42px;
    height: 42px;
  }

  .layer-copy {
    display: block;
  }

  .layer-card h3 {
    padding: 0;
    font-size: 16px;
  }

  .layer-card p {
    min-height: 0;
    margin-top: 8px;
    padding: 0;
    font-size: 14px;
    border-left: 0;
  }

  .layer-number {
    font-size: 30px;
  }
}

@media (max-width: 860px) {
  .architecture-section {
    padding: 0 0 64px;
  }

  .architecture-section .container {
    width: min(100% - 28px, 680px);
  }

  .architecture-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .architecture-intro {
    justify-items: center;
  }

  .architecture-eyebrow {
    min-height: 38px;
    padding: 0 20px;
    font-size: 14px;
  }

  .architecture-section .section-title {
    margin: 14px 0 10px;
    padding: 0;
    text-align: center;
    font-size: clamp(24px, 7vw, 30px);
    line-height: 1.25;
  }

  .architecture-intro > p {
    margin: 0;
    max-width: 560px;
    text-align: center;
    font-size: 14px;
    line-height: 1.65;
  }

  .architecture-visual {
    margin: 0;
  }

  .architecture-visual > .architecture-hub-image {
    width: min(100%, 480px);
  }

  .layer-list {
    grid-template-columns: 1fr;
    gap: 12px;
    padding-top: 0;
  }

  .layer-card,
  .layer-card:last-child {
    min-height: 92px;
    padding: 14px;
    grid-template-columns: 54px minmax(0, 1fr) 30px;
    gap: 12px;
    grid-column: auto;
    border-radius: var(--radius-md);
  }

  .layer-card::before {
    inset-block: 12px;
  }

  .layer-icon {
    width: 48px;
    height: 48px;
  }

  .layer-copy {
    display: block;
  }

  .layer-card h3 {
    padding: 0;
    font-size: 14px;
  }

  .layer-card p {
    min-height: 0;
    margin-top: 6px;
    padding: 0;
    font-size: 13px;
    line-height: 1.42;
    border-left: 0;
  }

  .layer-number {
    font-size: 26px;
  }
}

@media (max-width: 420px) {
  .architecture-section .container {
    width: min(100% - 20px, 390px);
  }

  .architecture-section .section-title {
    font-size: clamp(24px, 7.2vw, 30px);
  }

  .layer-card,
  .layer-card:last-child {
    grid-template-columns: 48px minmax(0, 1fr) 28px;
    gap: 8px;
  }

  .layer-icon {
    width: 42px;
    height: 42px;
  }

  .layer-card h3 {
    font-size: 14px;
  }

  .layer-card p {
    font-size: 13px;
  }

  .layer-number {
    font-size: 24px;
  }
}