/* ============ TOKENS ============ */
:root {
  --bg: #0a0e1a;
  --bg-2: #0f172a;
  --bg-3: #111827;
  --surface: rgba(255, 255, 255, 0.04);
  --surface-2: rgba(255, 255, 255, 0.06);
  --border: rgba(255, 255, 255, 0.08);
  --border-2: rgba(255, 255, 255, 0.14);
  --text: #e6edf7;
  --text-2: #a8b3c7;
  --text-3: #6b7796;
  --primary: #22d3ee;
  --primary-2: #3b82f6;
  --primary-3: #6366f1;
  --accent: #f59e0b;
  --danger: #ef4444;
  --success: #10b981;
  --grad-1: linear-gradient(135deg, #22d3ee 0%, #3b82f6 50%, #6366f1 100%);
  --grad-2: linear-gradient(135deg, #3b82f6 0%, #6366f1 100%);
  --grad-3: linear-gradient(135deg, #0ea5e9 0%, #6366f1 100%);
  --shadow-1: 0 10px 30px rgba(0, 0, 0, 0.35);
  --shadow-2: 0 20px 60px rgba(34, 211, 238, 0.18);
  --radius: 14px;
  --radius-2: 22px;
  --maxw: 1240px;
}

/* ============ RESET ============ */
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Noto Sans SC', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
em { font-style: normal; }
strong { font-weight: 700; color: #fff; }

/* ============ COMMON ============ */
.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 28px;
  position: relative;
}
.section { padding: 110px 0; position: relative; }
.section-head {
  text-align: center;
  margin-bottom: 60px;
}
.section-head .kicker {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.28em;
  color: var(--primary);
  font-weight: 700;
  padding: 6px 14px;
  border: 1px solid rgba(34, 211, 238, 0.3);
  border-radius: 99px;
  margin-bottom: 18px;
  background: rgba(34, 211, 238, 0.06);
}
.section-head h2 {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 14px;
  background: linear-gradient(180deg, #fff 0%, #b8c5d9 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.section-head p {
  color: var(--text-2);
  font-size: 16px;
  max-width: 720px;
  margin: 0 auto;
}
.section-head.light .kicker {
  color: #fde68a;
  border-color: rgba(253, 224, 71, 0.4);
  background: rgba(253, 224, 71, 0.06);
}
.section-head.light h2 {
  background: linear-gradient(180deg, #fff 0%, #c7d2fe 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.grad {
  background: var(--grad-1);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 900;
}

/* ============ BUTTONS ============ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 99px;
  font-weight: 600;
  font-size: 15px;
  transition: all .3s;
  position: relative;
  white-space: nowrap;
}
.btn-primary {
  background: var(--grad-1);
  color: #0a0e1a;
  box-shadow: 0 8px 30px rgba(34, 211, 238, 0.35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(34, 211, 238, 0.55);
}
.btn-ghost {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-2);
  color: #fff;
  backdrop-filter: blur(10px);
}
.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--primary);
}

/* ============ NAV ============ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(10, 14, 26, 0.6);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
  transition: all .3s;
}
.nav.scrolled {
  background: rgba(10, 14, 26, 0.85);
  border-bottom-color: var(--border);
}
.nav-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 14px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}
.logo-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 42px;
  flex-shrink: 0;
}
.logo-mark img {
  height: 100%;
  width: auto;
  display: block;
  object-fit: contain;
}
.footer-logo {
  height: 56px;
}
.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}
.logo-text strong {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: #fff;
}
.logo-text em {
  font-size: 10px;
  color: var(--text-3);
  letter-spacing: 0.18em;
  font-weight: 500;
  margin-top: 2px;
}
.nav-menu {
  display: flex;
  gap: 6px;
  align-items: center;
}
.nav-menu a {
  padding: 8px 14px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-2);
  border-radius: 99px;
  transition: all .2s;
  position: relative;
}
.nav-menu a:hover { color: #fff; background: rgba(255, 255, 255, 0.06); }
.nav-menu a.nav-hot { color: var(--primary); }
.nav-menu a.nav-hot i {
  display: inline-block;
  font-size: 9px;
  background: var(--accent);
  color: #0a0e1a;
  font-weight: 800;
  padding: 1px 5px;
  border-radius: 4px;
  margin-left: 4px;
  vertical-align: middle;
  font-style: normal;
}
.nav-toggle {
  display: none;
  width: 36px;
  height: 36px;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  padding: 0 6px;
}
.nav-toggle span {
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: all .3s;
}

/* ============ HERO ============ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  padding: 120px 28px 80px;
}
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero-bg canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}
.hero-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 30%, rgba(34, 211, 238, 0.18) 0%, transparent 60%),
              radial-gradient(ellipse at 80% 70%, rgba(99, 102, 241, 0.18) 0%, transparent 60%);
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10, 14, 26, 0.4) 0%, rgba(10, 14, 26, 0.85) 80%, var(--bg) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 980px;
  margin: 0 auto;
  animation: fadeUp 1s ease;
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  background: rgba(34, 211, 238, 0.1);
  border: 1px solid rgba(34, 211, 238, 0.3);
  border-radius: 99px;
  font-size: 13px;
  color: var(--primary);
  font-weight: 500;
  margin-bottom: 28px;
  backdrop-filter: blur(10px);
}
.badge-dot {
  width: 8px;
  height: 8px;
  background: var(--primary);
  border-radius: 50%;
  box-shadow: 0 0 12px var(--primary);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}
.hero-title {
  font-size: clamp(34px, 6vw, 68px);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 28px;
  color: #fff;
}
.hero-title .t1 {
  display: block;
  background: var(--grad-1);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 14px;
}
.hero-title .t2 {
  display: block;
  font-size: 0.7em;
  color: var(--text);
  font-weight: 700;
}
.hero-sub {
  font-size: 16px;
  color: var(--text-2);
  margin-bottom: 40px;
  line-height: 1.85;
}
.hero-cta {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 60px;
}
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 720px;
  margin: 0 auto;
  padding: 28px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.stat b {
  font-size: 32px;
  font-weight: 900;
  background: var(--grad-1);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.02em;
}
.stat b small {
  font-size: 16px;
  font-weight: 600;
  margin-left: 2px;
  -webkit-text-fill-color: var(--primary);
}
.stat span {
  font-size: 13px;
  color: var(--text-3);
}
.hero-scroll {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  width: 28px;
  height: 46px;
  border: 2px solid var(--border-2);
  border-radius: 99px;
  z-index: 2;
  display: flex;
  justify-content: center;
  padding-top: 8px;
}
.hero-scroll span {
  width: 4px;
  height: 8px;
  background: var(--primary);
  border-radius: 2px;
  animation: scroll 1.6s infinite;
}
@keyframes scroll {
  0% { transform: translateY(0); opacity: 1; }
  100% { transform: translateY(16px); opacity: 0; }
}

/* ============ ABOUT ============ */
.section-about { background: var(--bg); }
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}
.about-text p {
  color: var(--text-2);
  margin-bottom: 18px;
  font-size: 15.5px;
}
.about-text em {
  color: var(--primary);
  font-weight: 600;
  font-style: normal;
}
.about-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: all .3s;
  position: relative;
  overflow: hidden;
}
.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 2px;
  background: var(--grad-1);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .4s;
}
.card:hover {
  border-color: rgba(34, 211, 238, 0.3);
  background: var(--surface-2);
  transform: translateY(-4px);
}
.card:hover::before { transform: scaleX(1); }
.card-icon {
  font-size: 28px;
  margin-bottom: 12px;
}
.card h4 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
  color: #fff;
}
.card p {
  font-size: 13.5px;
  color: var(--text-2);
  line-height: 1.6;
}

/* ============ AI ============ */
.section-ai {
  background: linear-gradient(180deg, var(--bg) 0%, #050816 50%, var(--bg) 100%);
  position: relative;
  overflow: hidden;
}
.ai-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 20%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 60%, rgba(34, 211, 238, 0.12) 0%, transparent 50%);
  pointer-events: none;
}
.ai-hero {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 60px;
  align-items: center;
  margin-bottom: 80px;
  position: relative;
  z-index: 1;
}
.ai-hero-text h3 {
  font-size: clamp(24px, 3.2vw, 36px);
  font-weight: 900;
  line-height: 1.3;
  color: #fff;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}
.ai-hero-text p {
  color: var(--text-2);
  font-size: 16px;
  margin-bottom: 28px;
}
.ai-pillars {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.ai-pillars li {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  transition: all .3s;
}
.ai-pillars li:hover {
  border-color: var(--primary);
  background: rgba(34, 211, 238, 0.06);
}
.ai-pillars span {
  display: block;
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 4px;
}
.ai-pillars small {
  font-size: 12.5px;
  color: var(--text-2);
}

.ai-hero-visual {
  position: relative;
  height: 420px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.ai-orbit {
  position: relative;
  width: 360px;
  height: 360px;
}
.orbit-center {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  z-index: 10;
  filter: drop-shadow(0 0 30px rgba(34, 211, 238, 0.5));
  animation: floatCenter 4s ease-in-out infinite;
}
@keyframes floatCenter {
  0%, 100% { transform: translate(-50%, -50%); }
  50% { transform: translate(-50%, -55%); }
}
.orbit-ring {
  position: absolute;
  top: 50%; left: 50%;
  border-radius: 50%;
  border: 1px dashed rgba(34, 211, 238, 0.25);
  transform: translate(-50%, -50%);
}
.orbit-ring.r1 {
  width: 200px; height: 200px;
  animation: spin 20s linear infinite;
}
.orbit-ring.r2 {
  width: 320px; height: 320px;
  border-color: rgba(99, 102, 241, 0.25);
  animation: spin 30s linear infinite reverse;
}
@keyframes spin {
  to { transform: translate(-50%, -50%) rotate(360deg); }
}
.orbit-node {
  position: absolute;
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(34, 211, 238, 0.15) 0%, rgba(99, 102, 241, 0.15) 100%);
  border: 1px solid rgba(34, 211, 238, 0.4);
  border-radius: 16px;
  font-weight: 800;
  font-size: 14px;
  color: #fff;
  backdrop-filter: blur(10px);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  animation: floatNode 5s ease-in-out infinite;
}
@keyframes floatNode {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}
.orbit-node.n1 { top: 0; left: 50%; transform: translateX(-50%); animation-delay: 0s; }
.orbit-node.n2 { top: 28%; right: 0; animation-delay: 0.5s; }
.orbit-node.n3 { bottom: 0; left: 50%; transform: translateX(-50%); animation-delay: 1s; }
.orbit-node.n4 { top: 28%; left: 0; animation-delay: 1.5s; }
.orbit-node.n5 { top: 70%; right: 0; animation-delay: 2s; }
.orbit-node.n6 { top: 70%; left: 0; animation-delay: 2.5s; }

.ai-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 80px;
  position: relative;
  z-index: 1;
}
.ai-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-2);
  padding: 32px 28px;
  transition: all .3s;
  position: relative;
  overflow: hidden;
}
.ai-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 4px;
  height: 100%;
  background: var(--grad-1);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform .4s;
}
.ai-card:hover {
  border-color: rgba(34, 211, 238, 0.3);
  background: var(--surface-2);
  transform: translateY(-4px);
}
.ai-card:hover::before { transform: scaleY(1); }
.ai-icon {
  font-size: 36px;
  margin-bottom: 16px;
  display: inline-block;
  filter: drop-shadow(0 4px 8px rgba(34, 211, 238, 0.3));
}
.ai-card h4 {
  font-size: 19px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 10px;
}
.ai-card > p {
  font-size: 14px;
  color: var(--text-2);
  margin-bottom: 16px;
  line-height: 1.6;
}
.ai-card ul li {
  font-size: 13.5px;
  color: var(--text-2);
  padding: 4px 0 4px 22px;
  position: relative;
}
.ai-card ul li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--primary);
  font-weight: 700;
}

/* AI Flow */
.ai-flow {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius-2);
  padding: 50px 40px;
  position: relative;
  z-index: 1;
}
.ai-flow-title {
  text-align: center;
  font-size: 24px;
  font-weight: 800;
  margin-bottom: 36px;
  color: #fff;
}
.ai-flow-steps {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr;
  gap: 12px;
  align-items: center;
}
.step {
  text-align: center;
  padding: 20px 14px;
  background: rgba(34, 211, 238, 0.06);
  border: 1px solid rgba(34, 211, 238, 0.18);
  border-radius: 14px;
  transition: all .3s;
}
.step:hover {
  transform: translateY(-3px);
  border-color: var(--primary);
  box-shadow: 0 10px 30px rgba(34, 211, 238, 0.2);
}
.step-num {
  display: inline-block;
  font-size: 13px;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 8px;
  letter-spacing: 0.1em;
}
.step h5 {
  font-size: 17px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 6px;
}
.step p {
  font-size: 13px;
  color: var(--text-2);
}
.step-arrow {
  font-size: 22px;
  color: var(--primary);
  font-weight: 800;
  text-align: center;
}

/* ============ QUALS ============ */
.section-quals { background: var(--bg-2); }
.quals-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.qual-item {
  background: linear-gradient(135deg, rgba(34, 211, 238, 0.05) 0%, rgba(99, 102, 241, 0.05) 100%);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 24px 20px;
  text-align: center;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  transition: all .3s;
}
.qual-item:hover {
  border-color: var(--primary);
  transform: translateY(-3px);
  background: linear-gradient(135deg, rgba(34, 211, 238, 0.12) 0%, rgba(99, 102, 241, 0.12) 100%);
}

/* ============ PRODUCTS ============ */
.section-products { background: var(--bg); }
.products-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.product {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
  transition: all .3s;
  position: relative;
}
.product:hover {
  border-color: rgba(34, 211, 238, 0.3);
  transform: translateY(-4px);
  background: var(--surface-2);
}
.product-num {
  display: inline-block;
  font-size: 11px;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: 0.15em;
  margin-bottom: 8px;
  opacity: 0.8;
}
.product h4 {
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
  line-height: 1.45;
}
.product p {
  font-size: 13px;
  color: var(--text-2);
  margin-bottom: 12px;
  line-height: 1.6;
}
.product-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  color: var(--primary);
  padding: 3px 10px;
  background: rgba(34, 211, 238, 0.1);
  border-radius: 99px;
  letter-spacing: 0.05em;
}

/* ============ SOLUTIONS ============ */
.section-solutions { background: var(--bg-2); }
.solution-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}
.solution {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-2);
  padding: 36px 32px;
  transition: all .3s;
  position: relative;
  overflow: hidden;
}
.solution:hover {
  border-color: rgba(34, 211, 238, 0.3);
  background: var(--surface-2);
}
.solution-no {
  position: absolute;
  top: 20px;
  right: 24px;
  font-size: 80px;
  font-weight: 900;
  background: var(--grad-1);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  opacity: 0.15;
  line-height: 1;
}
.solution h4 {
  font-size: 22px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 16px;
}
.solution ul li {
  font-size: 14px;
  color: var(--text-2);
  padding: 6px 0 6px 22px;
  position: relative;
  line-height: 1.6;
}
.solution ul li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--primary);
  font-weight: 700;
}

/* ============ CUSTOMERS ============ */
.section-customers { background: var(--bg); }
.customer-labels {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 40px;
}
.clabel {
  padding: 6px 16px;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  background: rgba(34, 211, 238, 0.08);
  border: 1px solid rgba(34, 211, 238, 0.25);
  border-radius: 99px;
}
.customer-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 18px;
}
.customer-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px 20px;
  transition: all .3s;
}
.customer-card:hover {
  border-color: rgba(34, 211, 238, 0.3);
  transform: translateY(-3px);
}
.customer-card h4 {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}
.customer-card ul li {
  font-size: 13px;
  color: var(--text-2);
  padding: 4px 0;
  line-height: 1.5;
}

/* ============ ORG / 核心力量 ============ */
.section-org { background: var(--bg-2); }

.force-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 36px;
}
.force-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-2);
  padding: 34px 28px;
  text-align: center;
  transition: all .3s;
  position: relative;
  overflow: hidden;
}
.force-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 4px;
  height: 100%;
  background: var(--grad-1);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform .4s;
}
.force-card:hover {
  border-color: rgba(34, 211, 238, 0.3);
  background: var(--surface-2);
  transform: translateY(-4px);
}
.force-card:hover::before { transform: scaleY(1); }
.force-icon {
  font-size: 40px;
  margin-bottom: 16px;
  display: inline-block;
  filter: drop-shadow(0 4px 10px rgba(34, 211, 238, 0.3));
}
.force-card h4 {
  font-size: 20px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 6px;
}
.force-sub {
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  letter-spacing: 0.05em;
  margin-bottom: 14px;
}
.force-desc {
  font-size: 13.5px;
  color: var(--text-2);
  line-height: 1.65;
}

.org-support {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  padding: 22px 28px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
}
.support-label {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-3);
  letter-spacing: 0.15em;
  white-space: nowrap;
}
.support-tags {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.support-tags span {
  font-size: 13px;
  color: var(--text-2);
  padding: 5px 14px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: 99px;
  transition: all .2s;
}
.support-tags span:hover {
  color: #fff;
  border-color: var(--primary);
  background: rgba(34, 211, 238, 0.08);
}

/* ============ CTA ============ */
.section-cta { padding: 60px 0 100px; background: var(--bg); }
.cta-card {
  background: linear-gradient(135deg, rgba(34, 211, 238, 0.1) 0%, rgba(99, 102, 241, 0.1) 100%);
  border: 1px solid rgba(34, 211, 238, 0.3);
  border-radius: 28px;
  padding: 70px 60px;
  text-align: center;
  position: relative;
  overflow: hidden;
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 50px;
  align-items: center;
}
.cta-content { text-align: left; }
.cta-card h2 {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 900;
  color: #fff;
  margin-bottom: 16px;
  line-height: 1.3;
}
.cta-card p {
  font-size: 16px;
  color: var(--text-2);
  margin-bottom: 32px;
}
.cta-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
.cta-wechat {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(34, 211, 238, 0.3);
  border-radius: 20px;
  padding: 20px;
  position: relative;
  z-index: 1;
  backdrop-filter: blur(10px);
  transition: all .3s;
  display: flex;
  align-items: center;
  justify-content: center;
}
.cta-wechat:hover {
  border-color: var(--primary);
  transform: translateY(-4px);
  box-shadow: 0 20px 50px rgba(34, 211, 238, 0.25);
}
.cta-qr {
  width: 180px;
  height: 180px;
  background: #fff;
  border-radius: 14px;
  padding: 8px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
}
.cta-qr img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 8px;
  display: block;
}
.cta-deco {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.deco-dot {
  position: absolute;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.4;
}
.deco-dot.d1 { background: var(--primary); top: -50px; left: -50px; }
.deco-dot.d2 { background: var(--primary-3); bottom: -50px; right: -50px; }
.deco-dot.d3 { background: var(--primary-2); top: 50%; left: 50%; transform: translate(-50%, -50%); }

/* ============ FOOTER ============ */
.footer {
  background: #050816;
  padding: 80px 0 30px;
  border-top: 1px solid var(--border);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 50px;
}
.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.footer-brand p {
  font-size: 13px;
  color: var(--text-2);
  line-height: 1.7;
}
.footer-brand .footer-tag {
  color: var(--primary);
  font-weight: 600;
}
.footer-col h5 {
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  letter-spacing: 0.05em;
}
.footer-col ul li {
  font-size: 13.5px;
  color: var(--text-2);
  padding: 5px 0;
  transition: color .2s;
}
.footer-col ul li:hover { color: var(--primary); }

.footer-wechat .wechat-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 12px;
  display: flex;
  flex-direction: column;
  align-items: center;
  transition: all .3s;
}
.footer-wechat .wechat-card:hover {
  border-color: rgba(34, 211, 238, 0.4);
  background: rgba(34, 211, 238, 0.05);
  transform: translateY(-3px);
}
.footer-wechat .wechat-card img {
  width: 100%;
  max-width: 150px;
  aspect-ratio: 1 / 1;
  border-radius: 10px;
  background: #fff;
  padding: 6px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}
.footer-bottom {
  padding-top: 28px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-3);
}

/* ============ RESPONSIVE ============ */
@media (max-width: 1024px) {
  .nav-menu { display: none; }
  .nav-toggle { display: flex; }
  .nav-menu.open {
    display: flex;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(10, 14, 26, 0.95);
    backdrop-filter: blur(20px);
    padding: 20px;
    border-top: 1px solid var(--border);
    gap: 4px;
  }
  .nav-menu.open a {
    width: 100%;
    padding: 12px 16px;
  }
  .ai-hero { grid-template-columns: 1fr; }
  .ai-hero-visual { height: 360px; }
  .ai-grid { grid-template-columns: 1fr 1fr; }
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .products-grid { grid-template-columns: 1fr 1fr; }
  .quals-grid { grid-template-columns: 1fr 1fr; }
  .customer-grid { grid-template-columns: 1fr 1fr 1fr; }
  .solution-grid { grid-template-columns: 1fr; }
  .force-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
  .footer-wechat { grid-column: 1 / -1; }
  .footer-wechat .wechat-card { max-width: 200px; margin: 0 auto; }
  .ai-flow-steps { grid-template-columns: 1fr; gap: 12px; }
  .step-arrow { transform: rotate(90deg); }
}
@media (max-width: 640px) {
  .section { padding: 70px 0; }
  .container { padding: 0 20px; }
  .hero { padding: 100px 20px 60px; }
  .hero-stats { grid-template-columns: 1fr 1fr; gap: 14px; }
  .stat b { font-size: 26px; }
  .ai-grid { grid-template-columns: 1fr; }
  .about-cards { grid-template-columns: 1fr; }
  .products-grid { grid-template-columns: 1fr; }
  .quals-grid { grid-template-columns: 1fr; }
  .customer-grid { grid-template-columns: 1fr; }
  .force-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 8px; }
  .ai-flow { padding: 30px 20px; }
  .cta-card { padding: 40px 24px; grid-template-columns: 1fr; gap: 30px; }
  .cta-content { text-align: center; }
  .cta-actions { justify-content: center; }
  .cta-wechat { padding: 16px; }
  .cta-qr { width: 160px; height: 160px; }
  .ai-orbit { width: 280px; height: 280px; }
  .orbit-ring.r1 { width: 160px; height: 160px; }
  .orbit-ring.r2 { width: 260px; height: 260px; }
  .orbit-node { width: 50px; height: 50px; font-size: 12px; }
}

/* ============ AOS-LIKE ============ */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .8s, transform .8s;
}
.reveal.in {
  opacity: 1;
  transform: translateY(0);
}