* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: '微软雅黑', sans-serif;
}

body {
    background: url('../../../../background.png') no-repeat center center fixed;
    background-size: cover;
    min-height: 100vh;
}

h1 {
    color: #2c3e50;
    text-decoration: none;
    margin-bottom: 1rem;
    font-size: 2.4em;
}

div img {
    padding: 1rem;
    max-width: calc(100% - 2rem);
    height: auto;
    box-sizing: border-box;
}

.content {
    padding: 100px 10%;
    color: #2c3e50;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 50px;
    background-color: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(5px);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: relative;
}

.logo img {
    height: 40px;
    max-width: 180px;
    transition: transform 0.3s;
}

.logo:hover img {
    transform: scale(1.05);
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-links li {
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    color: #2c3e50;
    font-weight: 500;
    padding: 10px 15px;
    border-radius: 5px;
    transition: all 0.3s;
    position: relative;
}

.nav-links a::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: #3498db;
    transition: width 0.3s;
}

.nav-links a:hover::before {
    width: 100%;
}

.nav-links a:hover {
    color: #3498db;
}

.back-button {
    position: absolute;
    left: 50px;
    top: 90px;
    display: flex;
    align-items: center;
    color: #3498db;
    text-decoration: none;
    font-weight: 500;
    padding: 8px 15px;
    border-radius: 20px;
    background: rgba(255,255,255,0.9);
    backdrop-filter: blur(2px);
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    z-index: 100;
}

.back-button::before {
    content: '';
    display: block;
    width: 12px;
    height: 12px;
    border-left: 2px solid #3498db;
    border-bottom: 2px solid #3498db;
    transform: rotate(45deg);
    margin-right: 8px;
    transition: all 0.3s;
}

.back-button:hover {
    transform: translateX(-5px);
    background: rgba(255,255,255,1);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.back-button:hover::before {
    border-color: #2980b9;
}

.container {
  width: auto;
  max-width: 1000px;
  margin: 100px auto;
  padding: 40px;
  background: rgba(255,255,255,0.9);
  backdrop-filter: blur(3px);
  border-radius: 12px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.1);
  text-align: center;
}

@media (max-width: 768px) {
  .navbar {
      padding: 10px 20px;
      width: 142%;
  }

  .container {
      width: 142%;
      padding: 25px;
  }

  h1 {
      font-size: 1.8em;
  }

  .back-button {
      left: 20px;
      top: 70px;
  }
}