:root {
  --primary-color: #4a6fa5;
  --secondary-color: #166088;
  --accent-color: #4fc3f7;
  --text-color: #333;
  --light-bg: #f8f9fa;
  --card-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--light-bg);
  margin: 0;
  padding: 20px;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  background: white;
  border-radius: 10px;
  box-shadow: var(--card-shadow);
  padding: 30px;
  position: relative;
}

.back-btn {
  position: absolute;
  top: 20px;
  left: 20px;
  color: var(--primary-color);
  text-decoration: none;
  font-size: 1.2em;
  transition: color 0.3s;
}

.back-btn:hover {
  color: var(--accent-color);
}

.profile-header {
  text-align: center;
  margin-bottom: 30px;
}

.avatar {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  object-fit: cover;
  border: 5px solid var(--accent-color);
  margin-bottom: 15px;
}

h1 {
  color: var(--primary-color);
  margin: 10px 0 5px;
}

.tagline {
  color: #666;
  font-size: 1.1em;
  margin-bottom: 20px;
}

h2 {
  color: var(--secondary-color);
  border-bottom: 2px solid var(--accent-color);
  padding-bottom: 8px;
  margin-top: 30px;
}

/* 美化details元素 */
details {
  margin: 15px 0;
  border: 1px solid #e0e0e0;
  border-radius: 8px;
  overflow: hidden;
  transition: all 0.3s ease;
}

details[open] {
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

summary {
  padding: 12px 15px;
  background-color: #f5f7fa;
  cursor: pointer;
  font-weight: 500;
  display: flex;
  align-items: center;
  outline: none;
  transition: background-color 0.3s;
}

summary:hover {
  background-color: #ebf2fa;
}

summary::-webkit-details-marker {
  display: none;
}

summary:after {
  content: "+";
  margin-left: auto;
  font-size: 1.2em;
  transition: transform 0.3s;
}

details[open] summary:after {
  content: "-";
}

.skill-item {
  display: flex;
  align-items: center;
  margin: 10px 15px;
  gap: 15px;
}

progress {
  flex-grow: 1;
  height: 10px;
  border-radius: 5px;
  overflow: hidden;
}

progress::-webkit-progress-bar {
  background-color: #e0e0e0;
  border-radius: 5px;
}

progress::-webkit-progress-value {
  background-color: var(--accent-color);
  border-radius: 5px;
}

.detail {
  padding: 10px 15px;
  background-color: white;
}

.content {
  margin: 10px 0;
  border: 1px solid #e0e0e0;
  border-radius: 6px;
}

ul {
  list-style: none;
  padding: 0;
}

li {
  margin: 10px 0;
  padding: 8px 0;
  border-bottom: 1px dashed #e0e0e0;
}

a {
  color: var(--secondary-color);
  text-decoration: none;
  transition: color 0.3s;
}

a:hover {
  color: var(--accent-color);
}

del {
  color: #999;
  margin-left: 15px;
  font-style: italic;
}

@media (max-width: 600px) {
  .container {
    padding: 20px 15px;
  }

  .avatar {
    width: 120px;
    height: 120px;
  }
}