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

:root {
  --primary: #111827;
  --primary-light: #1f2937;
  --accent: #3b82f6;
  --text: #111827;
  --text-secondary: #6b7280;
  --text-muted: #9ca3af;
  --bg: #ffffff;
  --bg-light: #f8fafc;
  --border: #e5e7eb;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 25px 60px rgba(0, 0, 0, 0.12);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.04);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
  font-size: 18px;
  font-weight: 600;
}

.logo-icon {
  width: 40px;
  height: 40px;
  object-fit: contain;
}

.btn-login {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 24px;
  border: 1px solid var(--border);
  border-radius: 24px;
  color: var(--text);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.2s;
}

.btn-login:hover {
  border-color: var(--text);
  background: var(--text);
  color: #fff;
}

/* Hero */
.hero {
  padding: 80px 0 60px;
  background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
  overflow: hidden;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 60px;
  align-items: center;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 24px;
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 24px;
  width: fit-content;
}

.hero-tag .dot {
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
}

.hero-title {
  font-size: 48px;
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 20px;
  color: var(--text);
}

.hero-desc {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 32px;
  max-width: 440px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  background: var(--primary);
  color: #fff;
  text-decoration: none;
  border-radius: 28px;
  font-size: 15px;
  font-weight: 500;
  transition: all 0.2s;
  box-shadow: 0 4px 14px rgba(17, 24, 39, 0.2);
}

.btn-primary:hover {
  background: var(--primary-light);
  transform: translateY(-1px);
  box-shadow: 0 8px 22px rgba(17, 24, 39, 0.25);
}

.hero-image {
  position: relative;
}

.hero-image img {
  width: 100%;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  background: #fff;
}

/* Industries */
.industries {
  padding: 60px 0;
  text-align: center;
}

.section-label {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 28px;
  letter-spacing: 0.05em;
}

.industry-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  max-width: 760px;
  margin: 0 auto;
}

.industry-tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 14px;
  color: var(--text-secondary);
  transition: all 0.2s;
}

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

.industry-tag svg {
  width: 18px;
  height: 18px;
}

/* Features */
.features {
  padding: 80px 0;
  background: var(--bg-light);
}

.section-title {
  font-size: 32px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 48px;
}

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

.feature-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow);
  transition: transform 0.2s;
}

.feature-card:hover {
  transform: translateY(-4px);
}

.feature-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--primary);
  border-radius: 12px;
  margin-bottom: 20px;
}

.feature-icon svg {
  width: 24px;
  height: 24px;
  color: #fff;
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* Showcase */
.showcase {
  padding: 80px 0;
}

.showcase-grid {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.showcase-row {
  display: grid;
  gap: 16px;
}

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

.showcase-row-4 {
  grid-template-columns: repeat(4, 1fr);
}

.showcase-item {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-light);
}

.showcase-row-2 .showcase-item {
  aspect-ratio: 2 / 1;
}

.showcase-row-4 .showcase-item {
  aspect-ratio: 1;
}

.showcase-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.4s;
}

.showcase-item:hover img {
  transform: scale(1.02);
}

/* CTA */
.cta {
  background: var(--primary);
  padding: 80px 0;
  text-align: center;
}

.cta-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}

.qr-code {
  width: 160px;
  height: 160px;
  border-radius: 16px;
  background: #fff;
  padding: 8px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 32px;
  background: transparent;
  color: #fff;
  text-decoration: none;
  border: 1px solid rgba(255, 255, 255, 0.4);
  border-radius: 28px;
  font-size: 15px;
  font-weight: 500;
  transition: all 0.2s;
}

.btn-outline:hover {
  background: #fff;
  color: var(--primary);
}

/* Footer */
.footer {
  background: var(--primary);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 24px 0;
  text-align: center;
}

.footer p {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.4);
  margin: 0;
  line-height: 1.8;
}

/* Responsive */
@media (max-width: 992px) {
  .hero-inner {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 40px;
  }

  .hero-desc {
    margin-left: auto;
    margin-right: auto;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }

  .showcase-row-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .hero-title {
    font-size: 36px;
  }

  .hero-subtitle {
    font-size: 24px;
  }

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

  .showcase-row-2 {
    grid-template-columns: 1fr;
  }

  .showcase-row-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}