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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  color: #1a1a2e;
  background: #fff;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  line-height: 1.7;
}

/* ===== Header ===== */
.site-header {
  background: #fff;
  border-bottom: 1px solid #f0f0f5;
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-header .container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 18px;
  font-weight: 700;
  color: #1a1a2e;
  letter-spacing: -0.3px;
}

.nav-links a {
  font-size: 14px;
  color: #555;
  text-decoration: none;
  margin-left: 28px;
  transition: color 0.2s;
}

.nav-links a:hover {
  color: #2563eb;
}

/* ===== Hero ===== */
.hero {
  background: #0f172a;
  color: #fff;
  padding: 100px 24px 80px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(ellipse at 30% 20%, rgba(37, 99, 235, 0.15) 0%, transparent 60%),
              radial-gradient(ellipse at 70% 80%, rgba(99, 102, 241, 0.12) 0%, transparent 50%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 640px;
  margin: 0 auto;
}

.hero h1 {
  font-size: 42px;
  font-weight: 700;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
  line-height: 1.2;
}

.hero .tagline {
  font-size: 18px;
  color: #94a3b8;
  margin-bottom: 36px;
}

.hero .btn {
  display: inline-block;
  padding: 12px 32px;
  background: #2563eb;
  color: #fff;
  font-size: 15px;
  font-weight: 500;
  border-radius: 8px;
  text-decoration: none;
  transition: all 0.25s ease;
  border: none;
  cursor: pointer;
}

.hero .btn:hover {
  background: #1d4ed8;
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.3);
}

/* ===== Sections ===== */
.section {
  padding: 72px 24px;
}

.section-title {
  font-size: 28px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 12px;
  color: #0f172a;
}

.section-subtitle {
  font-size: 15px;
  color: #64748b;
  text-align: center;
  margin-bottom: 48px;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
}

/* ===== Features ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.feature-card {
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  padding: 32px 28px;
  transition: all 0.25s ease;
}

.feature-card:hover {
  border-color: #cbd5e1;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
  transform: translateY(-2px);
}

.feature-icon {
  width: 44px;
  height: 44px;
  background: #eff6ff;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  font-size: 20px;
}

.feature-card h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
  color: #0f172a;
}

.feature-card p {
  font-size: 14px;
  color: #64748b;
  line-height: 1.7;
}

/* ===== Contact ===== */
.contact-section {
  background: #f8fafc;
  border-top: 1px solid #e2e8f0;
}

.contact-info {
  display: flex;
  justify-content: center;
  gap: 48px;
  flex-wrap: wrap;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 15px;
  color: #475569;
}

.contact-item .icon {
  width: 40px;
  height: 40px;
  background: #eff6ff;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}

/* ===== ICP Page ===== */
.icp-main {
  max-width: 800px;
  margin: 0 auto;
  padding: 60px 24px 40px;
  flex: 1;
}

.icp-main h1 {
  font-size: 26px;
  font-weight: 700;
  margin-bottom: 12px;
  color: #0f172a;
}

.icp-main .lead {
  color: #64748b;
  font-size: 15px;
  margin-bottom: 32px;
}

.icp-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  background: #fff;
  border: 1px solid #e2e8f0;
  border-radius: 10px;
  overflow: hidden;
  margin-bottom: 36px;
}

.icp-table th,
.icp-table td {
  padding: 14px 20px;
  text-align: left;
  font-size: 14px;
  border-bottom: 1px solid #f1f5f9;
}

.icp-table th {
  background: #f8fafc;
  font-weight: 600;
  width: 180px;
  color: #475569;
}

.icp-table tr:last-child th,
.icp-table tr:last-child td {
  border-bottom: none;
}

.icp-table a {
  color: #2563eb;
  text-decoration: none;
}

.icp-table a:hover {
  text-decoration: underline;
}

.status-badge {
  display: inline-block;
  padding: 2px 10px;
  background: #dcfce7;
  color: #15803d;
  font-size: 12px;
  font-weight: 500;
  border-radius: 20px;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: #64748b;
  font-size: 14px;
  text-decoration: none;
  transition: color 0.2s;
}

.back-link:hover {
  color: #2563eb;
}

/* ===== Footer ===== */
.site-footer {
  background: #0f172a;
  color: #94a3b8;
  padding: 28px 24px;
  text-align: center;
  font-size: 13px;
}

.site-footer a {
  color: #94a3b8;
  text-decoration: none;
  transition: color 0.2s;
}

.site-footer a:hover {
  color: #e2e8f0;
}

.site-footer .separator {
  margin: 0 10px;
  color: #334155;
}

/* ===== Responsive ===== */
@media (max-width: 640px) {
  .hero h1 {
    font-size: 28px;
  }

  .hero .tagline {
    font-size: 16px;
  }

  .section {
    padding: 48px 20px;
  }

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

  .contact-info {
    flex-direction: column;
    gap: 20px;
    align-items: center;
  }

  .icp-main {
    padding: 40px 16px 24px;
  }

  .icp-table th,
  .icp-table td {
    padding: 12px 14px;
    font-size: 13px;
  }

  .icp-table th {
    width: 130px;
  }
}