* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', Tahoma, sans-serif;
  color: #e0e0e0;
}

body {
  background: #0a0a12;
}

a {
  text-decoration: none;
}

.hero {
  position: relative;
  height: 25vh; /* ← 原本是 50vh，現在縮短為 25vh */
  background: radial-gradient(circle at center, #000822 0%, #000010 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: -1rem;
}


.hero .overlay {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: rgba(10, 10, 18, 0.6);
}

.hero .content {
  font-family: 'Ma Shan Zheng', 'Microsoft YaHei', sans-serif;
  position: relative;
  text-align: center;
  z-index: 1;
}

.cl3 {
  font-family: 'Ma Shan Zheng', 'Microsoft YaHei', sans-serif;
  font-size: 36px;
  color: #00faff;
  text-shadow: 0 0 12px rgba(0, 255, 255, 0.9);
}

.hero h1 {
  font-size: 3rem;
  color: #33eaff;
  text-shadow: 0 0 20px #33eaff;
}

.hero p {
  margin-top: 1rem;
  font-size: 1.2rem;
  color: #ccc;
}

.nav-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  padding: 2rem 2rem 4rem 2rem;
  max-width: 1200px;
  margin: auto;
}

.site-card {
  background: rgba(40, 40, 60, 0.4);
  border-radius: 12px;
  padding: 2rem;
  text-align: center;
  backdrop-filter: blur(6px);
  box-shadow: 0 0 10px #1bb7ff44;
  transition: transform 0.3s;
}
.site-card:hover {
  transform: translateY(-6px);
}

.site-card h2 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
  color: #33eaff;
}

.site-card .speed {
  color: #85e0ff;
  font-weight: bold;
}

.site-card .btn {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.6rem 1.5rem;
  background: #33eaff;
  color: #0a0a12;
  border-radius: 50px;
  transition: background 0.3s;
}
.site-card .btn:hover {
  background: #1bb7ff;
}

.footer {
  text-align: center;
  padding: 2rem;
  font-size: 1.2rem;
  line-height: 1.8;
  color: #ccc;
}
.footer a {
  color: #33eaff;
  text-decoration: none;
  font-weight: bold;
}
.footer a:hover {
  text-shadow: 0 0 8px #33eaff;
}