:root {
  --bg: #0d0d0d;
  --accent: #00d1ff;
  --text: #ffffff;
  --font: 'Inter', system-ui, sans-serif;
}

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

html,
body {
  height: 100%;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
}

/* 让 footer 沉底 */
body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.hero {
  flex: 1 0 auto;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  padding: 2rem 5vw;
  background: url('public/bg.jpg') center/cover no-repeat fixed;
  position: relative;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  z-index: 0;
}

.hero > * {
  position: relative;
  z-index: 1;
}

.logo {
  width: 120px;
  margin-bottom: 2rem;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 0.5rem;
}

h2 {
  font-size: clamp(1.125rem, 2.5vw, 1.5rem);
  font-weight: 400;
  margin-bottom: 2.5rem;
  opacity: 0.9;
}

.cta-group {
  display: flex;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.9rem 2rem;
  border-radius: 0.5rem;
  background: var(--accent);
  color: var(--bg);
  font-weight: 700;
  text-decoration: none;
  transition: transform 0.2s;
}
.btn:hover {
  transform: translateY(-2px);
}
.btn img {
  width: 20px;
  height: 20px;
}

/* 底部三链接：水平平铺 + 整体居中 */
.footer {
  flex-shrink: 0;
  display: flex;
  justify-content: center;
  padding: 2rem 0;
}

.footer-links {
  display: flex;
  gap: 2rem;
  font-size: 0.875rem;
}

.footer-links a {
  color: var(--text);
  opacity: 0.6;
  text-decoration: none;
}
.footer-links a:hover {
  opacity: 1;
}