/* 曼诺互创科技 — ESPER 风格网格极简科技风 */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --white: #FAFBFC;
  --bg: #FFFFFF;
  --navy: #0A1628;
  --navy-mid: #1A3050;
  --text: #0A1628;
  --text-light: #6B7A8D;
  --text-muted: #A0ADBC;
  --grid: rgba(90, 140, 200, 0.18);
  --grid-strong: rgba(90, 140, 200, 0.35);
  --accent: #3B8BF5;
  --cyan: #5ECFCF;
  --cyan-glow: rgba(94, 207, 207, 0.6);
  --ease: cubic-bezier(0.25, 1, 0.5, 1);
  --transition: 350ms var(--ease);
  --font: "PingFang SC", "Helvetica Neue", "Microsoft YaHei", Helvetica, Arial, sans-serif;
  --col: calc(100% / 12);
  --page-pad: clamp(24px, 4vw, 64px);
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent); }
img { max-width: 100%; display: block; }

/* ── 可见网格系统 ── */
.page-wrap { position: relative; min-height: 100vh; }

.grid-overlay {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.grid-overlay .grid-v {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--grid);
  transform-origin: top;
  transform: scaleY(0);
  animation: gridDrawV 1.2s var(--ease) forwards;
}

.grid-overlay .grid-v:nth-child(1) { left: var(--col); animation-delay: 0ms; }
.grid-overlay .grid-v:nth-child(2) { left: calc(var(--col) * 2); animation-delay: 80ms; }
.grid-overlay .grid-v:nth-child(3) { left: calc(var(--col) * 3); animation-delay: 160ms; }
.grid-overlay .grid-v:nth-child(4) { left: calc(var(--col) * 4); animation-delay: 240ms; }
.grid-overlay .grid-v:nth-child(5) { left: calc(var(--col) * 5); animation-delay: 320ms; }
.grid-overlay .grid-v:nth-child(6) { left: calc(var(--col) * 6); animation-delay: 400ms; }
.grid-overlay .grid-v:nth-child(7) { left: calc(var(--col) * 7); animation-delay: 480ms; }
.grid-overlay .grid-v:nth-child(8) { left: calc(var(--col) * 8); animation-delay: 560ms; }
.grid-overlay .grid-v:nth-child(9) { left: calc(var(--col) * 9); animation-delay: 640ms; }
.grid-overlay .grid-v:nth-child(10) { left: calc(var(--col) * 10); animation-delay: 720ms; }
.grid-overlay .grid-v:nth-child(11) { left: calc(var(--col) * 11); animation-delay: 800ms; }

@keyframes gridDrawV { to { transform: scaleY(1); } }

.grid-h {
  position: absolute;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--grid);
  transform-origin: left;
  transform: scaleX(0);
}

.grid-h.drawn { animation: gridDrawH 0.8s var(--ease) forwards; }

@keyframes gridDrawH { to { transform: scaleX(1); } }

.page-content { position: relative; z-index: 1; }

/* ── 导航 ── */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  padding: 0 var(--page-pad);
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--grid);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--navy);
  text-decoration: none;
  flex-shrink: 0;
}

.nav-logo img {
  height: 32px;
  width: auto;
  display: block;
}

.nav-logo-text {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.nav-links {
  display: flex;
  gap: clamp(20px, 3vw, 40px);
  list-style: none;
}

.nav-links a {
  font-size: 13px;
  font-weight: 400;
  color: var(--text-light);
  letter-spacing: 0.04em;
  position: relative;
  padding-bottom: 2px;
}

.nav-links a.active { color: var(--navy); font-weight: 500; }

.nav-links a::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width var(--transition);
}

.nav-links a:hover::after,
.nav-links a.active::after { width: 100%; }

.nav-lang {
  font-size: 13px;
  color: var(--text-light);
  cursor: pointer;
  letter-spacing: 0.04em;
}

/* ── 排版 ── */
.label {
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  text-transform: lowercase;
  margin-bottom: 16px;
}

.label::first-letter { text-transform: uppercase; }

.display {
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.05;
  color: var(--navy);
  text-transform: uppercase;
}

.heading {
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.2;
  color: var(--navy);
  text-transform: uppercase;
}

.body-text {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.8;
  max-width: 420px;
}

.section {
  padding: clamp(60px, 8vw, 100px) var(--page-pad);
  position: relative;
}

.section + .section { border-top: 1px solid var(--grid); }

.section-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 0;
  align-items: center;
}

.col-4 { grid-column: span 4; }
.col-5 { grid-column: span 5; }
.col-6 { grid-column: span 6; }
.col-7 { grid-column: span 7; }
.col-8 { grid-column: span 8; }
.col-12 { grid-column: span 12; }

/* ── 按钮 ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0;
  border: none;
  background: none;
  font-family: var(--font);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--navy);
  cursor: pointer;
  transition: color var(--transition), transform 250ms var(--ease);
  will-change: transform;
}

.btn::after {
  content: "→";
  transition: transform var(--transition);
}

.btn:hover { color: var(--accent); }
.btn:hover::after { transform: translateX(4px); }
.btn:active { transform: scale(0.98); }

.btn-fill {
  padding: 12px 28px;
  background: var(--navy);
  color: #fff;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 12px;
}

.btn-fill::after { display: none; }
.btn-fill:hover { background: var(--navy-mid); color: #fff; }

a.btn-fill {
  text-decoration: none;
  display: inline-flex;
}

.btn-ghost {
  padding: 11px 24px;
  border: 1px solid var(--grid-strong);
  color: var(--text-light);
}

.btn-ghost::after { display: none; }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

/* ── 3D 抽象雕塑（极简线框） ── */
.model-stage {
  position: relative;
  height: clamp(360px, 50vw, 520px);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: grab;
  user-select: none;
}

.model-stage:active { cursor: grabbing; }

.model-stage.is-dragging .abs-orbit,
.model-stage.is-dragging .abs-ring-inner,
.model-stage.is-dragging .abs-node,
.model-stage.is-dragging .abs-pulse { animation-play-state: paused; }

.model-stage[data-mouse-tilt] { cursor: crosshair; }
.model-stage[data-mouse-tilt]:active { cursor: grabbing; }

.model-viewer {
  width: 280px;
  height: 280px;
  perspective: 1000px;
  position: relative;
}

.model-inner {
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  will-change: transform;
}

.abstract-sculpture {
  position: absolute;
  width: 160px;
  height: 160px;
  left: 50%;
  top: 50%;
  margin: -80px 0 0 -80px;
  transform-style: preserve-3d;
}

/* 核心点 — 纯光点，无面 */
.abs-core {
  position: absolute;
  width: 10px;
  height: 10px;
  left: 50%;
  top: 50%;
  margin: -5px 0 0 -5px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 16px var(--cyan-glow), 0 0 32px rgba(59, 139, 245, 0.2);
  animation: corePulse 4s ease-in-out infinite;
}

@keyframes corePulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.3); opacity: 0.85; }
}

/* 双环交叉 — 仅线条 */
.abs-orbit {
  position: absolute;
  left: 50%;
  top: 50%;
  border-radius: 50%;
  border: 1px solid rgba(90, 140, 200, 0.4);
  background: none;
  margin: 0;
}

.abs-orbit-1 {
  width: 160px;
  height: 160px;
  margin: -80px 0 0 -80px;
  transform: rotateX(68deg);
  animation: orbitA 20s linear infinite;
}

.abs-orbit-2 {
  width: 120px;
  height: 120px;
  margin: -60px 0 0 -60px;
  transform: rotateY(72deg);
  border-style: dashed;
  border-color: rgba(94, 207, 207, 0.45);
  animation: orbitB 16s linear infinite reverse;
}

@keyframes orbitA { to { transform: rotateX(68deg) rotateZ(360deg); } }
@keyframes orbitB { to { transform: rotateY(72deg) rotateZ(-360deg); } }

/* 单轨道节点 */
.abs-node {
  position: absolute;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 6px rgba(59, 139, 245, 0.5);
  left: 50%;
  top: 50%;
  animation: nodeOrbit 12s linear infinite;
}

@keyframes nodeOrbit {
  0% { transform: rotateX(68deg) rotateZ(0deg) translateX(80px); }
  100% { transform: rotateX(68deg) rotateZ(360deg) translateX(80px); }
}

/* ── 增强版雕塑（首页 Hero） ── */
.abstract-sculpture--rich {
  width: 180px;
  height: 180px;
  margin: -90px 0 0 -90px;
  transform: rotateX(calc(var(--mx, 0) * 1deg)) rotateY(calc(var(--my, 0) * 1deg));
  transition: transform 120ms linear;
}

.abstract-sculpture--rich .abs-orbit-1 {
  width: 180px;
  height: 180px;
  margin: -90px 0 0 -90px;
}

.abstract-sculpture--rich .abs-orbit-3 {
  width: 140px;
  height: 140px;
  margin: -70px 0 0 -70px;
  transform: rotateX(45deg) rotateY(45deg);
  border-color: rgba(59, 139, 245, 0.3);
  animation: orbitC 24s linear infinite;
}

@keyframes orbitC {
  to { transform: rotateX(45deg) rotateY(45deg) rotateZ(360deg); }
}

.abstract-sculpture--rich .abs-ring-inner {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 72px;
  height: 72px;
  margin: -36px 0 0 -36px;
  border: 1px solid rgba(94, 207, 207, 0.5);
  border-radius: 50%;
  transform: rotateX(calc(70deg + var(--mx, 0) * 2deg)) rotateZ(0deg);
  animation: innerTumble 10s linear infinite;
}

@keyframes innerTumble {
  to { transform: rotateX(calc(70deg + var(--mx, 0) * 2deg)) rotateZ(360deg); }
}

.abstract-sculpture--rich .abs-pulse {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 20px;
  height: 20px;
  margin: -10px 0 0 -10px;
  border: 1px solid rgba(94, 207, 207, 0.35);
  border-radius: 50%;
  animation: absPulseRing 3s ease-out infinite;
}

@keyframes absPulseRing {
  0% { transform: scale(1); opacity: 0.7; }
  100% { transform: scale(4); opacity: 0; }
}

.abstract-sculpture--rich .abs-node-1 { animation: nodeOrbit 12s linear infinite; }

.abstract-sculpture--rich .abs-node-2 {
  width: 4px;
  height: 4px;
  background: var(--cyan);
  box-shadow: 0 0 8px var(--cyan-glow);
  animation: nodeOrbit2 9s linear infinite reverse;
}

@keyframes nodeOrbit2 {
  0% { transform: rotateY(72deg) rotateZ(0deg) translateX(60px); }
  100% { transform: rotateY(72deg) rotateZ(-360deg) translateX(60px); }
}

.abstract-sculpture--rich .abs-core {
  display: none;
}

/* Hero 3D 雕塑中心 Logo */
.abs-logo {
  position: absolute;
  left: 50%;
  top: 50%;
  height: 56px;
  width: auto;
  margin: 0;
  z-index: 5;
  pointer-events: none;
  transform: translate(-50%, -50%) scale(calc(1 + var(--mg, 0) * 0.12));
  filter: drop-shadow(0 4px 12px rgba(10, 22, 40, 0.1));
  transition: transform 200ms var(--ease);
}

.abstract-sculpture--dark .abs-orbit { border-color: rgba(94, 207, 207, 0.3); }
.abstract-sculpture--dark .abs-orbit-2 { border-color: rgba(94, 207, 207, 0.35); }

.model-stage--compact .abstract-sculpture { transform: scale(0.8); }

/* ── 首页 Hero 科技视觉（大气增强版） ── */
.hero-visual {
  min-height: clamp(520px, 64vw, 700px);
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-tech-ambient {
  position: absolute;
  inset: -8% -4% -4% -8%;
  pointer-events: none;
  overflow: hidden;
  transform: translate(
    calc(var(--hx, 0) * -18px),
    calc(var(--hy, 0) * -14px)
  );
  transition: transform 80ms linear;
}

.hero-hex-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(59, 139, 245, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59, 139, 245, 0.07) 1px, transparent 1px),
    radial-gradient(circle at 50% 50%, rgba(94, 207, 207, 0.12) 0%, transparent 55%);
  background-size: 32px 32px, 32px 32px, 100% 100%;
  mask-image: radial-gradient(ellipse 70% 65% at 50% 50%, #000 20%, transparent 72%);
  animation: hexDrift 28s linear infinite;
}

@keyframes hexDrift {
  0% { background-position: 0 0, 0 0, center; }
  100% { background-position: 32px 32px, 32px 32px, center; }
}

.hero-glow-field {
  position: absolute;
  left: 50%;
  top: 50%;
  width: min(420px, 72%);
  height: min(560px, 90%);
  transform: translate(-50%, -50%);
  background: radial-gradient(
    circle,
    rgba(59, 139, 245, calc(0.14 + var(--hg, 0) * 0.12)) 0%,
    rgba(94, 207, 207, 0.06) 38%,
    transparent 68%
  );
  filter: blur(2px);
}

.hero-scan-line {
  position: absolute;
  left: 8%;
  right: 8%;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(94, 207, 207, 0.85), transparent);
  box-shadow: 0 0 20px rgba(94, 207, 207, 0.45);
  animation: heroScan 5.5s ease-in-out infinite;
  opacity: 0.65;
}

@keyframes heroScan {
  0%, 100% { top: 12%; opacity: 0; }
  8% { opacity: 0.7; }
  50% { top: 88%; opacity: 0.5; }
  92% { opacity: 0; }
}

.hero-orbit-field {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 100%;
  height: 100%;
  transform: translate(-50%, -50%);
}

.hero-orbit-field__ring {
  position: absolute;
  left: 50%;
  top: 50%;
  border-radius: 50%;
  border: 1px solid rgba(59, 139, 245, 0.18);
  transform: translate(-50%, -50%);
}

.hero-orbit-field__ring:nth-child(1) {
  width: 88%;
  height: 88%;
  animation: fieldRingA 22s linear infinite;
}

.hero-orbit-field__ring:nth-child(2) {
  width: 68%;
  height: 68%;
  border-style: dashed;
  border-color: rgba(94, 207, 207, 0.22);
  animation: fieldRingB 16s linear infinite reverse;
}

.hero-orbit-field__ring:nth-child(3) {
  width: 48%;
  height: 48%;
  animation: fieldRingC 12s linear infinite;
}

.hero-visual .hero-orbit-field__ring:nth-child(1) {
  width: 72%;
  height: 90%;
}

.hero-visual .hero-orbit-field__ring:nth-child(2) {
  width: 58%;
  height: 76%;
}

.hero-visual .hero-orbit-field__ring:nth-child(3) {
  width: 44%;
  height: 60%;
}

.hero-visual .hero-data-beams span {
  height: 168px;
  margin-top: -84px;
}

@keyframes fieldRingA {
  to { transform: translate(-50%, -50%) rotate(360deg); }
}

@keyframes fieldRingB {
  to { transform: translate(-50%, -50%) rotate(-360deg); }
}

@keyframes fieldRingC {
  to { transform: translate(-50%, -50%) rotate(360deg) scale(1.04); }
}

.hero-particles span {
  position: absolute;
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px rgba(59, 139, 245, 0.55);
  animation: heroParticle 6s ease-in-out infinite;
}

.hero-particles span:nth-child(1) { left: 18%; top: 22%; animation-delay: 0s; }
.hero-particles span:nth-child(2) { left: 78%; top: 18%; animation-delay: 0.4s; }
.hero-particles span:nth-child(3) { left: 84%; top: 62%; animation-delay: 0.8s; }
.hero-particles span:nth-child(4) { left: 24%; top: 72%; animation-delay: 1.2s; }
.hero-particles span:nth-child(5) { left: 52%; top: 12%; animation-delay: 1.6s; }
.hero-particles span:nth-child(6) { left: 12%; top: 48%; animation-delay: 2s; }
.hero-particles span:nth-child(7) { left: 68%; top: 78%; animation-delay: 2.4s; }
.hero-particles span:nth-child(8) { left: 42%; top: 86%; animation-delay: 2.8s; }
.hero-particles span:nth-child(9) { left: 90%; top: 38%; animation-delay: 3.2s; }
.hero-particles span:nth-child(10) { left: 32%; top: 32%; animation-delay: 3.6s; }
.hero-particles span:nth-child(11) { left: 58%; top: 58%; animation-delay: 4s; }
.hero-particles span:nth-child(12) { left: 72%; top: 42%; animation-delay: 4.4s; }

@keyframes heroParticle {
  0%, 100% { transform: translate(0, 0) scale(1); opacity: 0.35; }
  50% { transform: translate(calc(var(--hx, 0) * 12px), -14px) scale(1.6); opacity: 1; }
}

.hero-data-beams span {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 2px;
  height: 120px;
  margin-left: -1px;
  margin-top: -60px;
  background: linear-gradient(180deg, transparent, rgba(94, 207, 207, 0.7), transparent);
  transform-origin: center center;
  opacity: 0.45;
  animation: dataBeamSpin 14s linear infinite;
}

.hero-data-beams span:nth-child(1) { animation: dataBeamSpin0 14s linear infinite; }
.hero-data-beams span:nth-child(2) { animation: dataBeamSpin45 14s linear infinite; animation-delay: -3.5s; }
.hero-data-beams span:nth-child(3) { animation: dataBeamSpin90 14s linear infinite; animation-delay: -7s; }
.hero-data-beams span:nth-child(4) { animation: dataBeamSpin135 14s linear infinite; animation-delay: -10.5s; }

@keyframes dataBeamSpin0 {
  to { transform: rotate(360deg); }
}

@keyframes dataBeamSpin45 {
  to { transform: rotate(405deg); }
}

@keyframes dataBeamSpin90 {
  to { transform: rotate(450deg); }
}

@keyframes dataBeamSpin135 {
  to { transform: rotate(495deg); }
}

.model-stage--hero {
  height: clamp(520px, 64vw, 700px);
  width: 100%;
  z-index: 2;
}

.model-stage--hero .model-viewer {
  width: clamp(340px, 42vw, 480px);
  height: clamp(460px, 56vw, 600px);
  perspective: 1200px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Hero 机器人半身像 — 透明底固定，动效环绕 */
.hero-focal {
  --focal-h: clamp(380px, 48vw, 520px);
  --focal-w: calc(var(--focal-h) * 0.769);
  --orbit-w: calc(var(--focal-w) * 1.48);
  --orbit-h: calc(var(--focal-h) * 1.14);
  --orbit-rx: calc(var(--orbit-w) * 0.46);
  --orbit-ry: calc(var(--orbit-h) * 0.42);
  position: relative;
  width: var(--focal-w);
  height: var(--focal-h);
  pointer-events: none;
}

.hero-arm-effects {
  position: absolute;
  left: 50%;
  top: 50%;
  width: var(--orbit-w);
  height: var(--orbit-h);
  transform: translate(-50%, -50%);
  pointer-events: none;
}

.hero-arm-effects--back {
  z-index: 1;
}

.hero-arm-effects--front {
  z-index: 4;
}

.hero-focal-glow {
  position: absolute;
  left: 50%;
  top: 50%;
  width: calc(var(--focal-w) * 1.15);
  height: calc(var(--focal-h) * 0.96);
  transform: translate(-50%, -50%);
  z-index: 2;
  background: radial-gradient(
    ellipse 50% 58% at 50% 48%,
    rgba(59, 139, 245, calc(0.12 + var(--hg, 0) * 0.12)) 0%,
    rgba(94, 207, 207, 0.06) 40%,
    transparent 72%
  );
  filter: blur(10px);
}

.hero-focal-img {
  position: relative;
  z-index: 3;
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center center;
  filter: drop-shadow(0 10px 28px rgba(10, 22, 40, 0.1));
  transform: none !important;
}

.model-stage--hero[data-hero-fixed] {
  cursor: default;
}

.model-stage--hero[data-hero-fixed]:active {
  cursor: default;
}

.model-stage--hero[data-hero-fixed] .abstract-sculpture--arm {
  transform: none;
}

.model-stage--hero.is-dragging .hero-tech-ambient .hero-scan-line,
.model-stage--hero.is-dragging .hero-tech-ambient .hero-orbit-field__ring,
.model-stage--hero.is-dragging .hero-tech-ambient .hero-particles span,
.model-stage--hero.is-dragging .hero-tech-ambient .hero-data-beams span,
.model-stage--hero.is-dragging .abstract-sculpture--arm .abs-orbit,
.model-stage--hero.is-dragging .abstract-sculpture--arm .abs-pulse,
.model-stage--hero.is-dragging .abstract-sculpture--arm .abs-node,
.model-stage--hero.is-dragging .abstract-sculpture--arm .abs-beam {
  animation-play-state: paused;
}

.abstract-sculpture--arm {
  width: 100%;
  height: 100%;
  left: 50%;
  top: 50%;
  margin: -50% 0 0 -50%;
}

.abstract-sculpture--arm .abs-orbit-1 {
  width: 100%;
  height: 100%;
  margin: -50% 0 0 -50%;
  border-width: 1.5px;
  border-color: rgba(59, 139, 245, 0.5);
  transform: rotateX(72deg);
  animation: armOrbitA 18s linear infinite;
}

.abstract-sculpture--arm .abs-orbit-2 {
  width: 82%;
  height: 86%;
  margin: -43% 0 0 -41%;
  border-style: dashed;
  border-color: rgba(94, 207, 207, 0.45);
  transform: rotateY(68deg);
  animation: armOrbitB 14s linear infinite reverse;
}

.abstract-sculpture--arm .abs-orbit-3 {
  width: 64%;
  height: 70%;
  margin: -35% 0 0 -32%;
  transform: rotateX(52deg) rotateZ(12deg);
  animation: armOrbitC 20s linear infinite;
}

.abstract-sculpture--arm .abs-orbit-4 {
  width: 92%;
  height: 96%;
  margin: -48% 0 0 -46%;
  transform: rotateX(78deg) rotateZ(18deg);
  border: 1px dotted rgba(94, 207, 207, 0.42);
  animation: armOrbitD 26s linear infinite reverse;
}

@keyframes armOrbitA {
  to { transform: rotateX(72deg) rotateZ(360deg); }
}

@keyframes armOrbitB {
  to { transform: rotateY(68deg) rotateZ(-360deg); }
}

@keyframes armOrbitC {
  to { transform: rotateX(52deg) rotateZ(12deg) rotateY(360deg); }
}

@keyframes armOrbitD {
  to { transform: rotateX(78deg) rotateZ(18deg) rotateY(360deg); }
}

.abs-hex-frame {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 96px;
  height: 96px;
  margin: -48px 0 0 -48px;
  background: transparent;
  clip-path: polygon(50% 0%, 93% 25%, 93% 75%, 50% 100%, 7% 75%, 7% 25%);
  border: none;
  box-shadow:
    inset 0 0 0 1px rgba(94, 207, 207, 0.55),
    0 0 24px rgba(59, 139, 245, 0.2);
  animation: hexFramePulse 4s ease-in-out infinite;
}

.abs-hex-frame::before {
  content: "";
  position: absolute;
  inset: 6px;
  clip-path: polygon(50% 0%, 93% 25%, 93% 75%, 50% 100%, 7% 75%, 7% 25%);
  background: linear-gradient(135deg, rgba(59, 139, 245, 0.08), rgba(94, 207, 207, 0.12));
}

@keyframes hexFramePulse {
  0%, 100% { transform: scale(1); opacity: 0.9; }
  50% { transform: scale(1.06); opacity: 1; }
}

.abs-core-glow {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 140px;
  height: 140px;
  margin: -70px 0 0 -70px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(94, 207, 207, 0.25) 0%, transparent 70%);
  animation: coreGlowBreath 3.5s ease-in-out infinite;
  z-index: 1;
}

@keyframes coreGlowBreath {
  0%, 100% { transform: scale(0.92); opacity: 0.6; }
  50% { transform: scale(1.08); opacity: 1; }
}

.abstract-sculpture--arm .abs-ring-inner {
  width: 46%;
  height: 52%;
  margin: -26% 0 0 -23%;
  border-width: 1.5px;
  animation-duration: 8s;
}

.abstract-sculpture--arm .abs-ring-inner--2 {
  width: 30%;
  height: 34%;
  margin: -17% 0 0 -15%;
  border-color: rgba(59, 139, 245, 0.45);
  animation: armInnerTumble2 6s linear infinite reverse;
}

@keyframes armInnerTumble2 {
  to { transform: rotateX(calc(55deg + var(--mx, 0) * 2deg)) rotateZ(-360deg); }
}

.abstract-sculpture--arm .abs-pulse {
  width: 38%;
  height: 42%;
  margin: -21% 0 0 -19%;
}

.abs-pulse--2 {
  animation-delay: 1.5s;
  border-color: rgba(59, 139, 245, 0.35);
}

.abs-beam {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 1px;
  height: 100px;
  margin-left: -0.5px;
  margin-top: -50px;
  background: linear-gradient(180deg, transparent, rgba(59, 139, 245, 0.65), transparent);
  transform-origin: center center;
  opacity: 0.5;
}

.abstract-sculpture--arm-front .abs-beam {
  height: 58%;
  margin-top: -29%;
  opacity: 0.55;
}

.abs-beam-1 { animation: absBeamSpin0 10s linear infinite; }
.abs-beam-2 { animation: absBeamSpin60 10s linear infinite; animation-delay: -3.3s; }
.abs-beam-3 { animation: absBeamSpin120 10s linear infinite; animation-delay: -6.6s; }

@keyframes absBeamSpin0 {
  to { transform: rotate(360deg); }
}

@keyframes absBeamSpin60 {
  to { transform: rotate(420deg); }
}

@keyframes absBeamSpin120 {
  to { transform: rotate(480deg); }
}

.abstract-sculpture--arm .abs-node-1 { animation: armNodeOrbit1 10s linear infinite; }
.abstract-sculpture--arm .abs-node-2 { animation: armNodeOrbit2 7.5s linear infinite reverse; }

@keyframes armNodeOrbit1 {
  0% { transform: rotateX(68deg) rotateZ(0deg) translateX(var(--orbit-rx)) translateY(calc(var(--orbit-ry) * -0.08)); }
  100% { transform: rotateX(68deg) rotateZ(360deg) translateX(var(--orbit-rx)) translateY(calc(var(--orbit-ry) * -0.08)); }
}

@keyframes armNodeOrbit2 {
  0% { transform: rotateY(72deg) rotateZ(0deg) translateX(calc(var(--orbit-rx) * 0.88)) translateY(calc(var(--orbit-ry) * 0.06)); }
  100% { transform: rotateY(72deg) rotateZ(-360deg) translateX(calc(var(--orbit-rx) * 0.88)) translateY(calc(var(--orbit-ry) * 0.06)); }
}

.abstract-sculpture--arm .abs-node-3 {
  width: 7px;
  height: 7px;
  background: var(--cyan);
  box-shadow: 0 0 10px var(--cyan-glow);
  animation: armNodeOrbit3 11s linear infinite;
}

@keyframes armNodeOrbit3 {
  0% { transform: rotateX(48deg) rotateZ(0deg) translateX(calc(var(--orbit-rx) * 0.94)); }
  100% { transform: rotateX(48deg) rotateZ(360deg) translateX(calc(var(--orbit-rx) * 0.94)); }
}

.abstract-sculpture--arm .abs-node-4 {
  width: 6px;
  height: 6px;
  animation: armNodeOrbit4 8.5s linear infinite reverse;
}

@keyframes armNodeOrbit4 {
  0% { transform: rotateX(76deg) rotateY(18deg) rotateZ(0deg) translateX(calc(var(--orbit-rx) * 0.82)) translateY(calc(var(--orbit-ry) * -0.04)); }
  100% { transform: rotateX(76deg) rotateY(18deg) rotateZ(-360deg) translateX(calc(var(--orbit-rx) * 0.82)) translateY(calc(var(--orbit-ry) * -0.04)); }
}

.model-stage--hero .rotate-hint {
  bottom: 28px;
  right: 28px;
  letter-spacing: 0.14em;
  color: rgba(59, 139, 245, 0.55);
}

@media (prefers-reduced-motion: reduce) {
  .hero-tech-ambient *,
  .abstract-sculpture--arm .abs-orbit,
  .abstract-sculpture--arm .abs-pulse,
  .abstract-sculpture--arm .abs-node,
  .abstract-sculpture--arm .abs-beam {
    animation: none !important;
  }
}

.rotate-hint {
  position: absolute;
  bottom: 20px;
  right: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  text-transform: uppercase;
}

.rotate-hint svg { width: 28px; height: 28px; opacity: 0.5; }

/* ── 热点 ── */
.hotspot {
  position: absolute;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 12px var(--cyan-glow);
  cursor: pointer;
  z-index: 10;
  animation: pulse 2s ease-in-out infinite;
}

.hotspot::before {
  content: "";
  position: absolute;
  inset: -6px;
  border-radius: 50%;
  border: 1px solid var(--cyan);
  opacity: 0.4;
  animation: ripple 2s ease-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.2); }
}

@keyframes ripple {
  0% { transform: scale(0.8); opacity: 0.6; }
  100% { transform: scale(2); opacity: 0; }
}

.hotspot-tip {
  position: absolute;
  bottom: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  background: var(--navy);
  color: #fff;
  font-size: 11px;
  padding: 6px 12px;
  white-space: nowrap;
  border-radius: 2px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition), transform var(--transition);
}

.hotspot:hover .hotspot-tip {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ── 同心圆装饰 ── */
.ring-visual {
  position: relative;
  width: clamp(220px, 32vw, 340px);
  height: clamp(220px, 32vw, 340px);
  margin: 0 auto;
  transform-style: preserve-3d;
}

.ring-visual--interactive {
  cursor: crosshair;
}

.ring-visual .ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid var(--grid);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) translateZ(calc(var(--ring-z, 0) * 1px));
  animation: ringBreath 4s var(--ease) infinite;
  pointer-events: none;
}

.ring-visual .ring-1 { width: 100%; height: 100%; --ring-z: 0; animation-delay: 0s; }
.ring-visual .ring-2 { width: 82%; height: 82%; --ring-z: 8; animation-delay: 0.4s; opacity: 0.85; }
.ring-visual .ring-3 { width: 64%; height: 64%; --ring-z: 16; animation-delay: 0.8s; opacity: 0.7; border-style: dashed; border-color: rgba(94, 207, 207, 0.4); }
.ring-visual .ring-4 { width: 46%; height: 46%; --ring-z: 24; animation-delay: 1.2s; opacity: 0.55; }
.ring-visual .ring-5 { width: 28%; height: 28%; --ring-z: 32; animation-delay: 1.6s; opacity: 0.4; }

@keyframes ringBreath {
  0%, 100% {
    transform: translate(-50%, -50%) translateZ(calc(var(--ring-z, 0) * 1px)) scale(1);
    opacity: var(--ring-op, 1);
  }
  50% {
    transform: translate(-50%, -50%) translateZ(calc(var(--ring-z, 0) * 1px + 4px)) scale(calc(1 + var(--pmx, 0) * 0.04));
    opacity: calc(var(--ring-op, 1) * 0.75);
  }
}

.ring-visual .ring-axis {
  position: absolute;
  top: 50%;
  left: 50%;
  background: rgba(90, 140, 200, 0.2);
  pointer-events: none;
}

.ring-visual .ring-axis-h {
  width: 120%;
  height: 1px;
  margin: 0 0 0 -60%;
  transform: rotateY(calc(var(--ry, 0) * 1deg));
}

.ring-visual .ring-axis-v {
  width: 1px;
  height: 120%;
  margin: -60% 0 0 0;
  transform: rotateX(calc(var(--rx, 0) * 1deg));
}

.ring-visual .ring-node {
  position: absolute;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  top: 50%;
  left: 50%;
  margin: -2.5px 0 0 -2.5px;
  pointer-events: none;
}

.ring-visual .ring-node-1 {
  background: var(--accent);
  box-shadow: 0 0 8px rgba(59, 139, 245, 0.5);
  animation: ringNodeOrbit1 14s linear infinite;
}

.ring-visual .ring-node-2 {
  width: 4px;
  height: 4px;
  background: var(--cyan);
  box-shadow: 0 0 6px var(--cyan-glow);
  animation: ringNodeOrbit2 10s linear infinite reverse;
}

.ring-visual .ring-node-3 {
  width: 3px;
  height: 3px;
  background: var(--navy);
  opacity: 0.5;
  animation: ringNodeOrbit3 18s linear infinite;
}

@keyframes ringNodeOrbit1 {
  0% { transform: rotate(0deg) translateX(calc(120px + var(--pmx, 0) * 24px)) rotate(0deg); }
  100% { transform: rotate(360deg) translateX(calc(120px + var(--pmx, 0) * 24px)) rotate(-360deg); }
}

@keyframes ringNodeOrbit2 {
  0% { transform: rotate(0deg) translateX(calc(85px + var(--pmy, 0) * 18px)) rotate(0deg); }
  100% { transform: rotate(-360deg) translateX(calc(85px + var(--pmy, 0) * 18px)) rotate(360deg); }
}

@keyframes ringNodeOrbit3 {
  0% { transform: rotate(0deg) translateX(calc(55px - var(--pmx, 0) * 14px)) rotate(0deg); }
  100% { transform: rotate(360deg) translateX(calc(55px - var(--pmx, 0) * 14px)) rotate(-360deg); }
}

.ring-visual .ring-core {
  position: absolute;
  width: 10px;
  height: 10px;
  top: 50%;
  left: 50%;
  margin: -5px 0 0 -5px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 16px var(--cyan-glow);
  transform: translate(calc(var(--pmx, 0) * 18px), calc(var(--pmy, 0) * 18px));
  transition: transform 80ms linear, box-shadow 300ms var(--ease);
  z-index: 2;
}

.ring-visual--interactive:hover .ring-core {
  box-shadow: 0 0 24px var(--cyan-glow), 0 0 40px rgba(59, 139, 245, 0.25);
}

/* ── 标签 ── */
.tag {
  display: inline-block;
  padding: 4px 10px;
  border: 1px solid var(--grid-strong);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--text-light);
  text-transform: uppercase;
}

a.tag {
  text-decoration: none;
  transition: border-color var(--transition), color var(--transition), background var(--transition);
}

a.tag:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.tag--product {
  color: var(--navy);
  border-color: rgba(59, 139, 245, 0.35);
  background: rgba(59, 139, 245, 0.06);
}

.tag--product:hover {
  background: rgba(59, 139, 245, 0.12);
}

.related-cases {
  margin-bottom: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--grid);
}

.related-cases-title {
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.related-cases-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 10px;
}

.related-case-link {
  font-size: 13px;
  color: var(--navy);
  text-decoration: none;
  padding: 8px 0;
  border-bottom: 1px solid var(--grid);
  transition: color var(--transition);
}

.related-case-link:hover {
  color: var(--accent);
}

.related-cases-more {
  font-size: 12px;
  color: var(--accent);
  text-decoration: none;
  letter-spacing: 0.04em;
}

.related-cases-more:hover {
  text-decoration: underline;
}

.is-hidden {
  display: none !important;
}

/* ── 卡片（网格风格） ── */
.grid-card {
  border: 1px solid var(--grid);
  padding: 24px;
  transition: border-color var(--transition), transform var(--transition);
  will-change: transform;
  background: var(--bg);
}

.grid-card:hover {
  border-color: var(--grid-strong);
  transform: translateY(-3px);
}

/* 案例卡片 — 抽象标识，非图片 */
.grid-card-thumb {
  height: 120px;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid var(--grid);
  position: relative;
  overflow: hidden;
}

.grid-card-thumb::before {
  content: "";
  position: absolute;
  width: 48px;
  height: 48px;
  border: 1px solid var(--grid-strong);
  border-radius: 50%;
  animation: thumbRing 6s linear infinite;
}

.grid-card-thumb::after {
  content: "";
  position: absolute;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 8px var(--cyan-glow);
}

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

.grid-card-thumb-code {
  position: relative;
  z-index: 1;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--text-muted);
}

/* ── Footer ── */
.footer {
  padding: 48px var(--page-pad) 32px;
  border-top: 1px solid var(--grid);
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--navy);
  margin-bottom: 12px;
}

.footer-brand img {
  height: 26px;
  width: auto;
  display: block;
}

.footer-col h4 {
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 16px;
  font-weight: 500;
}

.footer-col ul { list-style: none; }
.footer-col li {
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 8px;
  cursor: pointer;
  transition: color var(--transition);
}

.footer-col li:hover { color: var(--accent); }

.footer-bottom {
  grid-column: 1 / -1;
  padding-top: 24px;
  border-top: 1px solid var(--grid);
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-muted);
}

/* ── 悬浮咨询 ── */
.float-form {
  position: fixed;
  bottom: 32px;
  right: 32px;
  z-index: 200;
}

.float-btn {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--navy);
  color: #fff;
  border: none;
  cursor: pointer;
  font-size: 18px;
  transition: transform var(--transition), box-shadow var(--transition);
  animation: breathe 4s ease-in-out infinite;
}

@keyframes breathe {
  0%, 100% { box-shadow: 0 0 0 0 rgba(10,22,40,0.2); }
  50% { box-shadow: 0 0 0 8px rgba(10,22,40,0); }
}

.float-btn:hover { transform: scale(1.08); }

.float-panel {
  position: absolute;
  bottom: 60px;
  right: 0;
  width: 260px;
  background: #fff;
  border: 1px solid var(--grid-strong);
  padding: 20px;
  opacity: 0;
  transform: translateY(8px);
  pointer-events: none;
  transition: opacity var(--transition), transform var(--transition);
}

.float-form.open .float-panel {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.float-panel h4 {
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--navy);
  margin-bottom: 14px;
}

.float-panel input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--grid);
  font-family: var(--font);
  font-size: 13px;
  margin-bottom: 10px;
  background: var(--white);
}

.float-panel input:focus {
  outline: none;
  border-color: var(--accent);
}

/* ── 滚动渐现 ── */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 500ms var(--ease), transform 500ms var(--ease);
  will-change: transform, opacity;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 100ms; }
.reveal-delay-2 { transition-delay: 200ms; }
.reveal-delay-3 { transition-delay: 300ms; }

/* ── Modal / Lightbox ── */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(10,22,40,0.7);
  z-index: 300;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(6px);
}

.modal-overlay.open { display: flex; }

.modal {
  background: #fff;
  max-width: 640px;
  width: 90%;
  max-height: 80vh;
  overflow-y: auto;
  border: 1px solid var(--grid-strong);
  animation: modalIn 400ms var(--ease);
}

@keyframes modalIn {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 32px;
  height: 32px;
  border: 1px solid var(--grid);
  background: #fff;
  cursor: pointer;
  font-size: 14px;
  transition: border-color var(--transition);
}

.modal-close:hover { border-color: var(--navy); }

.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(10,22,40,0.85);
  z-index: 300;
  align-items: center;
  justify-content: center;
}

.lightbox.open { display: flex; }

.lightbox-content {
  border: 1px solid rgba(255,255,255,0.2);
  padding: 24px;
  text-align: center;
  color: #fff;
}

.lightbox-close {
  position: fixed;
  top: 24px;
  right: 32px;
  background: none;
  border: none;
  color: #fff;
  font-size: 24px;
  cursor: pointer;
  opacity: 0.7;
  transition: opacity var(--transition);
}

.lightbox-close:hover { opacity: 1; }

/* ── CMS 上传图片 ── */
.cms-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.cms-img-crop {
  overflow: hidden;
  position: relative;
  width: 100%;
  height: 100%;
}

.cms-img-crop img {
  position: absolute;
  top: 0;
  left: 0;
  max-width: none;
  display: block;
}

.visual-block--photo {
  padding: 0;
  overflow: hidden;
}

.visual-block--photo .cms-img,
.visual-block--photo .cms-img-crop {
  height: 280px;
}

.grid-card-thumb .cms-img,
.grid-card-thumb .cms-img-crop {
  height: 120px;
}

.grid-card-thumb:has(.cms-img)::before,
.grid-card-thumb:has(.cms-img)::after {
  display: none;
}

.wf-img--photo {
  padding: 0;
}

.wf-img .cms-img,
.wf-img .cms-img-crop {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.wf-img--photo {
  position: relative;
}

.modal-img.has-image {
  padding: 0;
  height: auto;
  max-height: 360px;
  overflow: hidden;
}

.modal-img.has-image .cms-img,
.modal-img.has-image .cms-img-crop {
  width: 100%;
  max-height: 360px;
}

.modal-img.has-image .cms-img {
  object-fit: cover;
}

.modal-img.has-image .cms-img-crop {
  height: 360px;
}

/* ── 首页区块 ── */
.hero-section {
  min-height: calc(100vh - 72px);
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  align-items: center;
  padding: 0 var(--page-pad);
  position: relative;
}

.hero-text { grid-column: 1 / 6; padding-right: 40px; }
.hero-visual { grid-column: 6 / 13; position: relative; }

.grid-statement {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.section-head { margin-bottom: 48px; }
.section-certs { padding-bottom: 0; }
.section-cases { padding-bottom: 0; }
.section-shortcuts { padding: 0; }

.certs-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--grid);
  border-bottom: 1px solid var(--grid);
}

.cert-cell {
  padding: 40px 24px;
  text-align: center;
  border-right: 1px solid var(--grid);
  transition: background var(--transition);
}

.cert-cell:last-child { border-right: none; }
.cert-cell:hover { background: rgba(90, 140, 200, 0.04); }

.cert-num {
  font-size: 28px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 8px;
}

.cert-label {
  font-size: 12px;
  color: var(--text-muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.cases-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
}

.cases-row .grid-card {
  border-right: none;
  border-bottom: none;
  border-top: none;
}

.cases-row .grid-card:not(:last-child) { border-right: 1px solid var(--grid); }

.cases-row .grid-card h3 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 8px;
  letter-spacing: 0.02em;
  color: var(--navy);
}

.tags-row { display: flex; gap: 6px; margin-bottom: 16px; flex-wrap: wrap; }

.shortcuts-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
}

.shortcut-cell {
  display: block;
  padding: 48px 32px;
  border-right: 1px solid var(--grid);
  transition: background var(--transition), color var(--transition);
  color: inherit;
  text-decoration: none;
}

.shortcut-cell:last-child { border-right: none; }
.shortcut-cell:hover { background: rgba(90, 140, 200, 0.04); color: inherit; }

.shortcut-cell .num {
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.shortcut-cell h3 {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--navy);
  margin-bottom: 12px;
}

.shortcut-cell p {
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 24px;
  line-height: 1.7;
}

.hover-lift {
  transition: transform var(--transition), box-shadow var(--transition);
  will-change: transform;
}

.hover-lift:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 32px rgba(10, 22, 40, 0.08);
}

.footer-desc {
  font-size: 13px;
  color: var(--text-light);
  line-height: 1.8;
  max-width: 280px;
}

.social-links { display: flex; gap: 10px; }

.social-link {
  width: 36px;
  height: 36px;
  border: 1px solid var(--grid);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-light);
  transition: border-color var(--transition), color var(--transition);
}

.social-link:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.footer-col a { color: inherit; }
.footer-col a:hover { color: var(--accent); }

/* ── 页面进入动画 ── */
.page-enter {
  animation: pageEnter 450ms var(--ease) both;
}

@keyframes pageEnter {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ── 无障碍 ── */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ── 汉堡菜单 ── */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 8px;
  border: 1px solid var(--grid);
  background: var(--bg);
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  height: 1px;
  background: var(--navy);
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* ── 联系表单高亮 ── */
#contact-form-highlight.highlight {
  animation: contactPulse 2s var(--ease);
}

@keyframes contactPulse {
  0%, 100% { box-shadow: none; }
  30% { box-shadow: inset 0 0 0 2px var(--accent); }
}

#contact-form-highlight.highlight .contact-grid {
  border-color: var(--accent);
}

/* ── 智能浮窗提示 ── */
.float-form.pulse-hint .float-btn {
  animation: floatPulse 2s ease-in-out infinite;
}

@keyframes floatPulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(59, 139, 245, 0.45); transform: scale(1); }
  50% { box-shadow: 0 0 0 12px rgba(59, 139, 245, 0); transform: scale(1.06); }
}

.float-form.pulse-hint .float-panel h4::after {
  content: " · 点击获取白皮书";
  font-weight: 400;
  color: var(--accent);
}

/* ── 产品区交错滑入 ── */
.product-visual.slide-in-left,
.product-info.slide-in-right,
.product-section.reverse .product-visual.slide-in-right,
.product-section.reverse .product-info.slide-in-left {
  transition: opacity 500ms var(--ease), transform 500ms var(--ease);
}

.product-visual.slide-in-left {
  opacity: 0;
  transform: translateX(-40px);
}

.product-info.slide-in-right {
  opacity: 0;
  transform: translateX(40px);
}

.product-section.reverse .product-visual.slide-in-right {
  opacity: 0;
  transform: translateX(40px);
}

.product-section.reverse .product-info.slide-in-left {
  opacity: 0;
  transform: translateX(-40px);
}

.product-visual.slide-in-left.visible,
.product-info.slide-in-right.visible,
.product-section.reverse .product-visual.slide-in-right.visible,
.product-section.reverse .product-info.slide-in-left.visible {
  opacity: 1;
  transform: translateX(0);
}

/* ── 响应式 ── */
@media (max-width: 1024px) {
  .hero-text { grid-column: 1 / 7; }
  .hero-visual { grid-column: 7 / 13; }
  .footer { grid-template-columns: 1fr 1fr; }
  .products-layout { grid-template-columns: 160px 1fr; }
  .honors-grid { grid-template-columns: repeat(3, 1fr); }
  .team-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .nav-toggle { display: flex; }

  .nav-links {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--grid);
    padding: 8px 0 16px;
    transform: translateY(-110%);
    opacity: 0;
    pointer-events: none;
    transition: transform 350ms var(--ease), opacity 350ms var(--ease);
  }

  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-links li { width: 100%; }

  .nav-links a {
    display: block;
    padding: 14px var(--page-pad);
    border-bottom: 1px solid var(--grid);
  }

  .nav-lang { display: none; }

  .hero-section {
    grid-template-columns: 1fr;
    min-height: auto;
    padding: 48px var(--page-pad) 60px;
  }

  .hero-text,
  .hero-visual {
    grid-column: 1 / -1;
    padding-right: 0;
  }

  .hero-visual { margin-top: 40px; }

  .grid-statement,
  .intro-grid,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .certs-row { grid-template-columns: repeat(2, 1fr); }
  .cert-cell:nth-child(2) { border-right: none; }
  .cert-cell:nth-child(1),
  .cert-cell:nth-child(2) { border-bottom: 1px solid var(--grid); }

  .cases-row,
  .shortcuts-row { grid-template-columns: 1fr; }

  .cases-row .grid-card:not(:last-child),
  .shortcut-cell { border-right: none; border-bottom: 1px solid var(--grid); }

  .footer { grid-template-columns: 1fr; gap: 28px; }

  .footer-bottom {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }

  .products-layout { grid-template-columns: 1fr; }

  .sidebar-nav {
    position: sticky;
    top: 72px;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--grid);
    padding: 0;
    z-index: 50;
    background: rgba(255, 255, 255, 0.95);
  }

  .sidebar-nav ul {
    display: flex;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .sidebar-nav li {
    padding: 14px 20px;
    white-space: nowrap;
    border-left: none;
    border-bottom: 2px solid transparent;
  }

  .sidebar-nav li.active,
  .sidebar-nav li:hover {
    border-left-color: transparent;
    border-bottom-color: var(--accent);
  }

  .product-section,
  .product-section.reverse {
    grid-template-columns: 1fr;
  }

  .product-section.reverse .product-visual,
  .product-section.reverse .product-info { order: unset; }

  .product-visual { border-right: none !important; border-left: none !important; border-bottom: 1px solid var(--grid); }

  .waterfall { grid-template-columns: repeat(2, 1fr); }
  .wf-item:nth-child(3n) { border-right: 1px solid var(--grid); }
  .wf-item:nth-child(2n) { border-right: none; }

  .tabs { overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .tab-btn { flex-shrink: 0; padding: 14px 18px; }

  .honors-grid { grid-template-columns: repeat(2, 1fr); }
  .intro-stats { grid-template-columns: 1fr; }
  .stat-item { border-right: none; border-bottom: 1px solid var(--grid); }
  .stat-item:last-child { border-bottom: none; }
  .contact-info { border-right: none; border-bottom: 1px solid var(--grid); }

  .float-form { bottom: 20px; right: 20px; }
}

@media (max-width: 480px) {
  .waterfall { grid-template-columns: 1fr; }
  .wf-item { border-right: none !important; }
  .certs-row { grid-template-columns: 1fr; }
  .cert-cell { border-right: none; }
}