:root {
  --primary: #3b82f6;
  --primary-dark: #2563eb;
  --primary-light: #eff6ff;
  --gradient: linear-gradient(135deg, #60a5fa 0%, #3b82f6 55%, #2563eb 100%);
  --text: #0f172a;
  --text-muted: #64748b;
  --surface: #ffffff;
  --bg: #f8fafc;
  --border: #e2e8f0;
  --radius: 16px;
  --shadow: 0 1px 2px rgba(15, 23, 42, 0.04), 0 12px 32px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 24px 64px rgba(37, 99, 235, 0.15);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

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

.container {
  width: min(1120px, calc(100% - 48px));
  margin: 0 auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.8);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand img {
  width: 40px;
  height: 40px;
  border-radius: 12px;
}

.brand-text strong {
  display: block;
  font-size: 1.05rem;
  line-height: 1.2;
}

.brand-text span {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  font-size: 0.95rem;
  color: var(--text-muted);
  transition: color 0.2s;
}

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

.nav-links .btn-primary {
  color: #fff;
}

.nav-links .btn-primary:hover {
  color: #fff;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
}

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

.btn-primary {
  background: var(--gradient);
  color: #fff;
  box-shadow: 0 8px 24px rgba(59, 130, 246, 0.35);
}

.btn-primary:hover {
  box-shadow: 0 12px 32px rgba(59, 130, 246, 0.45);
}

.btn-outline {
  background: var(--surface);
  color: var(--primary);
  border: 1px solid var(--border);
}

.btn-lg {
  padding: 16px 32px;
  font-size: 1.05rem;
}

/* Hero */
.hero {
  position: relative;
  overflow: hidden;
  padding: 96px 0 80px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.5;
}

.orb-1 {
  width: 480px;
  height: 480px;
  background: #93c5fd;
  top: -120px;
  right: -80px;
}

.orb-2 {
  width: 360px;
  height: 360px;
  background: #bfdbfe;
  bottom: -80px;
  left: -60px;
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.hero-badge {
  display: inline-block;
  padding: 6px 14px;
  margin-bottom: 20px;
  border-radius: 999px;
  background: var(--primary-light);
  color: var(--primary-dark);
  font-size: 0.85rem;
  font-weight: 600;
}

.hero h1 {
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}

.hero h1 em {
  font-style: normal;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-desc {
  font-size: 1.15rem;
  line-height: 1.7;
  color: var(--text-muted);
  margin-bottom: 32px;
  max-width: 520px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 40px;
}

.hero-stats {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
}

.stat-item strong {
  display: block;
  font-size: 1.5rem;
  color: var(--primary-dark);
}

.stat-item span {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.hero-card {
  background: var(--surface);
  border-radius: 24px;
  padding: 28px;
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(255, 255, 255, 0.8);
}

.hero-card-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.hero-card-head img {
  width: 48px;
  height: 48px;
  border-radius: 14px;
}

.hero-card-head h3 {
  font-size: 1.1rem;
}

.hero-card-head p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.preview-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.preview-item {
  aspect-ratio: 1;
  border-radius: 14px;
  background: linear-gradient(145deg, #dbeafe, #eff6ff);
  display: flex;
  align-items: flex-end;
  padding: 12px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--primary-dark);
}

.preview-item:nth-child(1) {
  background: linear-gradient(145deg, #bfdbfe, #dbeafe);
}

.preview-item:nth-child(2) {
  background: linear-gradient(145deg, #c7d2fe, #e0e7ff);
}

.preview-item:nth-child(3) {
  background: linear-gradient(145deg, #a5f3fc, #cffafe);
}

.preview-item:nth-child(4) {
  background: linear-gradient(145deg, #fde68a, #fef3c7);
}

/* Sections */
.section {
  padding: 80px 0;
}

.section-title {
  text-align: center;
  margin-bottom: 48px;
}

.section-title h2 {
  font-size: 2rem;
  margin-bottom: 12px;
}

.section-title p {
  color: var(--text-muted);
  font-size: 1.05rem;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
  transition: transform 0.2s, box-shadow 0.2s;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 16px;
}

.feature-card h3 {
  font-size: 1.1rem;
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--text-muted);
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.step-card {
  text-align: center;
  padding: 32px 24px;
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.step-num {
  width: 40px;
  height: 40px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: var(--gradient);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

.step-card h3 {
  margin-bottom: 8px;
}

.step-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

.models-strip {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 32px;
}

.model-tag {
  padding: 8px 16px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--border);
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* CTA */
.cta-section {
  padding: 80px 0 96px;
}

.cta-box {
  text-align: center;
  padding: 64px 32px;
  border-radius: 28px;
  background: var(--gradient);
  color: #fff;
  box-shadow: var(--shadow-lg);
}

.cta-box h2 {
  font-size: 2rem;
  margin-bottom: 12px;
}

.cta-box p {
  opacity: 0.9;
  margin-bottom: 28px;
  font-size: 1.05rem;
}

.cta-box .btn-primary {
  background: #fff;
  color: var(--primary-dark);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

/* Footer */
.site-footer {
  padding: 32px 0 48px;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.site-footer a {
  color: var(--primary);
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-bottom: 16px;
}

.footer-beian {
  margin-top: 8px;
  font-size: 0.85rem;
}

.footer-beian a {
  color: var(--text-muted);
}

.footer-beian a:hover {
  color: var(--primary);
}

/* Company homepage */
.section-alt {
  background: #fff;
}

.about-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.about-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow);
}

.about-card h3 {
  font-size: 1.2rem;
  margin-bottom: 16px;
}

.about-card p {
  color: var(--text-muted);
  line-height: 1.7;
  font-size: 0.95rem;
}

.about-card p + p {
  margin-top: 12px;
}

.about-list {
  list-style: none;
  color: var(--text-muted);
  line-height: 1.8;
  font-size: 0.95rem;
}

.about-list li {
  position: relative;
  padding-left: 20px;
}

.about-list li::before {
  content: '·';
  position: absolute;
  left: 4px;
  color: var(--primary);
  font-weight: 700;
}

.corp-card .corp-tags {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.corp-tags span {
  padding: 10px 14px;
  border-radius: 12px;
  background: linear-gradient(145deg, #dbeafe, #eff6ff);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary-dark);
  text-align: center;
}

.process-flow {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.process-item {
  flex: 1;
  min-width: 180px;
  max-width: 220px;
  text-align: center;
  padding: 24px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.process-step {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 10px;
}

.process-item h3 {
  font-size: 1rem;
  margin-bottom: 8px;
}

.process-item p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.process-arrow {
  align-self: center;
  color: var(--text-muted);
  font-size: 1.2rem;
  padding-top: 24px;
}

.product-banner {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 36px 40px;
  box-shadow: var(--shadow);
}

.product-banner h3 {
  font-size: 1.3rem;
  margin-bottom: 10px;
}

.product-banner p {
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 560px;
  margin-bottom: 20px;
}

.product-banner-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* Responsive */
@media (max-width: 900px) {
  .hero-grid,
  .features-grid,
  .steps,
  .about-grid {
    grid-template-columns: 1fr;
  }

  .process-arrow {
    display: none;
  }

  .process-item {
    max-width: none;
  }

  .hero {
    padding-top: 64px;
  }

  .nav-links a:not(.btn) {
    display: none;
  }
}

@media (max-width: 600px) {
  .container {
    width: min(100%, calc(100% - 32px));
  }

  .hero-actions {
    flex-direction: column;
  }

  .hero-actions .btn {
    width: 100%;
  }
}