/* 
 * 核心设计系统 - 图南个人接口 & 云赛况
 * 采用现代暗色调，融合玻璃拟态与流体渐变
 */

:root {
  --primary-color: #3b82f6;
  --secondary-color: #8b5cf6;
  --accent-color: #06b6d4;
  --bg-dark: #0f172a;
  --card-bg: rgba(30, 41, 59, 0.7);
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --glass-border: rgba(255, 255, 255, 0.1);
  --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family:
    system-ui,
    -apple-system,
    "Segoe UI",
    Roboto,
    "Helvetica Neue",
    "PingFang SC",
    "Hiragino Sans GB",
    "Microsoft YaHei",
    Arial,
    sans-serif;
}

body {
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* 动态背景装饰 */
.bg-glow {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  overflow: hidden;
}

.glow-1 {
  position: absolute;
  top: -10%;
  right: -10%;
  width: 50vw;
  height: 50vw;
  background: radial-gradient(
    circle,
    rgba(59, 130, 246, 0.15) 0%,
    transparent 70%
  );
  filter: blur(80px);
}

.glow-2 {
  position: absolute;
  bottom: -10%;
  left: -10%;
  width: 40vw;
  height: 40vw;
  background: radial-gradient(
    circle,
    rgba(139, 92, 246, 0.1) 0%,
    transparent 70%
  );
  filter: blur(80px);
}

header {
  padding: 2rem;
  text-align: center;
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--glass-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.8rem;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.logo span {
  background: linear-gradient(
    135deg,
    var(--primary-color),
    var(--secondary-color)
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo img {
  height: 32px;
  width: auto;
  filter: drop-shadow(0 0 8px rgba(59, 130, 246, 0.3));
}

main {
  flex: 1;
  max-width: 1000px;
  margin: 4rem auto;
  padding: 0 2rem;
}

.hero {
  text-align: center;
  margin-bottom: 6rem;
  animation: fadeInUp 1s ease-out;
}

.hero h1 {
  font-size: 3.5rem;
  margin-bottom: 1.5rem;
  line-height: 1.1;
  background: linear-gradient(to right, #fff, #94a3b8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p {
  font-size: 1.25rem;
  color: var(--text-muted);
  max-width: 700px;
  margin: 0 auto;
}

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin-bottom: 6rem;
}

.feature-card {
  background: var(--card-bg);
  padding: 2.5rem;
  border-radius: 24px;
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(12px);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card:hover {
  transform: translateY(-10px);
  border-color: rgba(59, 130, 246, 0.4);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.feature-card h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--primary-color);
}

.feature-card p {
  color: var(--text-muted);
  font-size: 1rem;
}

.qrcode-section {
  text-align: center;
  background: linear-gradient(
    135deg,
    rgba(59, 130, 246, 0.1),
    rgba(139, 92, 246, 0.1)
  );
  padding: 4rem 2rem;
  border-radius: 32px;
  border: 1px solid var(--glass-border);
  animation: fadeIn 1.5s ease-out;
}

.qrcode-container {
  background: #fff;
  padding: 1rem;
  display: inline-block;
  border-radius: 16px;
  box-shadow: 0 0 30px rgba(59, 130, 246, 0.3);
  margin-bottom: 1.5rem;
  transition: var(--transition);
}

.qrcode-container:hover {
  transform: scale(1.05);
}

.qrcode-container img {
  max-width: 600px;
  width: 100%;
  height: auto;
  display: block;
}

.qrcode-section h2 {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.qrcode-section p {
  color: var(--text-muted);
}

footer {
  padding: 3rem 2rem;
  text-align: center;
  border-top: 1px solid var(--glass-border);
  margin-top: auto;
}

.beian-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

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

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.5rem;
  }
}