/* 现代化个人主页样式 */

/* 加载动画 */
.loading {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s ease;
}

.loading.hidden {
    opacity: 0;
    pointer-events: none;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid #000000;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* CSS变量定义 */
:root {
  /* 颜色系统 */
  --primary-color: #000000;
  --secondary-color: #666666;
  --accent-color: #0066ff;
  --background-color: #ffffff;
  --surface-color: #f8f9fa;
  --border-color: #e9ecef;
  --text-primary: #1a1a1a;
  --text-secondary: #6c757d;
  --text-light: #adb5bd;
  
  /* 间距系统 */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-xxl: 4rem;
  
  /* 字体系统 */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;
  
  /* 字体大小 */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  
  /* 阴影系统 */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  
  /* 圆角系统 */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  
  /* 过渡效果 */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* 布局 */
  --container-max-width: 1200px;
  --container-padding: 1.5rem;
}

/* 重置和基础样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-primary);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--background-color);
  overflow-x: hidden;
}

/* 容器 */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* 导航栏 */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  transition: var(--transition-normal);
}

.nav-container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
}

.nav-logo .logo-text {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--primary-color);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.nav-link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition-fast);
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary-color);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -0.5rem;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-color);
  transition: var(--transition-fast);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: 0.25rem;
}

.nav-toggle .bar {
  width: 1.5rem;
  height: 2px;
  background: var(--primary-color);
  transition: var(--transition-fast);
}

/* 移动端导航栏样式 */
@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 4rem;
    left: -100%;
    width: 100%;
    height: calc(100vh - 4rem);
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    padding-top: 2rem;
    transition: left 0.3s ease;
    gap: 2rem;
  }
  
  .nav-menu.active {
    left: 0;
  }
  
  .nav-toggle {
    display: flex;
  }
  
  .nav-toggle.active .bar:nth-child(1) {
    transform: rotate(45deg) translate(0.375rem, 0.375rem);
  }
  
  .nav-toggle.active .bar:nth-child(2) {
    opacity: 0;
  }
  
  .nav-toggle.active .bar:nth-child(3) {
    transform: rotate(-45deg) translate(0.375rem, -0.375rem);
  }
}

/* 全局字体大小自适应 */
@media (max-width: 768px) {
  html {
    font-size: 14px;
  }
  
  :root {
    --text-xs: 0.7rem;
    --text-sm: 0.8rem;
    --text-base: 0.9rem;
    --text-lg: 1rem;
    --text-xl: 1.125rem;
    --text-2xl: 1.25rem;
    --text-3xl: 1.5rem;
    --text-4xl: 1.875rem;
    --text-5xl: 2.25rem;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 13px;
  }
}
/* 主页部分 */
.hero {
  padding: calc(4rem + var(--spacing-xxl)) 0 var(--spacing-xxl) 0;
  background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
}

.hero-container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xxl);
  align-items: center;
}

.hero-text {
  animation: fadeInUp 0.8s ease-out;
}

.hero-subtitle {
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
  letter-spacing: 0.05em;
}

.hero-title {
  font-size: var(--text-5xl);
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: var(--spacing-md);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.name-highlight {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-description {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 2rem;
  font-size: var(--text-sm);
  font-weight: 500;
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: var(--transition-normal);
  cursor: pointer;
  border: none;
  outline: none;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--primary-color);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background: transparent;
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
  background: var(--primary-color);
  color: white;
  transform: translateY(-2px);
}

.hero-social {
  display: flex;
  gap: var(--spacing-lg);
  margin-top: var(--spacing-md);
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 3.5rem;
  height: 3.5rem;
  background: var(--surface-color);
  border-radius: var(--radius-lg);
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition-normal);
  box-shadow: var(--shadow-sm);
  margin: 0 0.25rem;
}

.social-link:hover {
  transform: translateY(-2px);
  background: var(--primary-color);
  color: white;
  box-shadow: var(--shadow-lg);
}

.social-link i {
  width: 1.25rem;
  height: 1.25rem;
}

.hero-image {
  display: flex;
  justify-content: center;
  animation: fadeInRight 0.8s ease-out;
}

.image-wrapper {
  position: relative;
  width: 20rem;
  height: 20rem;
}

.profile-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  position: relative;
  z-index: 2;
}

.image-bg {
  position: absolute;
  top: 1rem;
  left: 1rem;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, var(--accent-color) 0%, var(--primary-color) 100%);
  border-radius: var(--radius-xl);
  z-index: 1;
}

/* 部分标题 */
.section-header {
  text-align: center;
  margin-bottom: calc(var(--spacing-xxl) * 1.25);
  padding-bottom: var(--spacing-lg);
}

.section-title {
  font-size: var(--text-4xl);
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: var(--spacing-sm);
  letter-spacing: -0.02em;
}

.section-subtitle {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* 关于部分 */
.about {
  padding: calc(var(--spacing-xxl) * 1.5) 0;
  background: var(--background-color);
}

.about-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xxl);
}

.about-title {
  font-size: var(--text-3xl);
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: var(--spacing-lg);
}

.about-description {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: calc(var(--spacing-xl) * 1.5);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-md);
}

.skill-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  padding: var(--spacing-xl);
  background: var(--surface-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: var(--transition-normal);
  border: 1px solid var(--border-color);
}

.skill-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.skill-icon {
  width: 3rem;
  height: 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #fff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.skill-icon-img-large {
  width: 2rem;
  height: 2rem;
}

.skill-content h4 {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: var(--spacing-xs);
  line-height: 1.4;
}

.skill-content p {
  font-size: var(--text-base);
  color: var(--text-secondary);
  line-height: 1.6;
}

/* 技能部分 */
.skills {
  padding: calc(var(--spacing-xxl) * 1.5) 0;
  background: var(--surface-color);
}

.skills-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: var(--spacing-xxl);
}

.category-title {
  font-size: var(--text-2xl);
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: var(--spacing-lg);
}

.skill-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.skill-bar {
  background: var(--background-color);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  transition: var(--transition-normal);
}

.skill-bar:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.skill-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-sm);
}

.skill-name-with-icon {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.skill-icons {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.skill-icon-img {
  width: 1.25rem;
  height: 1.25rem;
  display: inline-block;
}

.skill-name {
  font-weight: 500;
  color: var(--primary-color);
}

.skill-level {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  font-weight: 500;
}

.progress-bar {
  height: 0.5rem;
  background: var(--border-color);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.progress {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-color) 0%, var(--accent-color) 100%);
  border-radius: var(--radius-sm);
  transition: width 1s ease-out;
}

/* 移动端技能部分样式 */
@media (max-width: 768px) {
  .skills-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-xxl);
  }
  
  .skill-list {
    gap: var(--spacing-lg);
  }
  
  .skill-bar {
    padding: var(--spacing-md);
  }
  
  .category-title {
    font-size: var(--text-xl);
    text-align: center;
    margin-bottom: var(--spacing-xl);
  }
  
  .skills-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
  }
  
  .skill-item {
    padding: var(--spacing-lg);
    gap: var(--spacing-md);
  }
}

/* 项目部分 */
.projects {
  padding: var(--spacing-xxl) 0;
  background: var(--background-color);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-xl);
}

.project-card {
  background: var(--surface-color);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: var(--transition-normal);
  position: relative;
}

.project-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.project-image {
  height: 200px;
  overflow: hidden;
  position: relative;
}

.project-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition-slow);
}

.project-card:hover .project-img {
  transform: scale(1.05);
}

.project-content {
  padding: var(--spacing-xl);
}

.project-title {
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: var(--spacing-sm);
}

.project-description {
  font-size: var(--text-base);
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--spacing-md);
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-lg);
}

.tech-tag {
  background: var(--background-color);
  color: var(--text-secondary);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  font-weight: 500;
  border: 1px solid var(--border-color);
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
}

.tech-tag-img {
  width: 1.125rem;
  height: 1.125rem;
  display: inline-block;
}

.project-links {
  display: flex;
  gap: var(--spacing-md);
}

.project-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--text-sm);
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition-fast);
}

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

.project-link i {
  width: 1rem;
  height: 1rem;
}

/* 联系部分 */
.contact {
  padding: var(--spacing-xxl) 0;
  background: var(--surface-color);
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xxl);
  align-items: start;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.contact-icon {
  width: 3rem;
  height: 3rem;
  background: var(--primary-color);
  color: white;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-icon i {
  width: 1.25rem;
  height: 1.25rem;
}

.contact-details h4 {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: 0.25rem;
}

.contact-details p {
  font-size: var(--text-base);
  color: var(--text-secondary);
}

/* 表单 */
.form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.form-group {
  position: relative;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 1rem;
  font-size: var(--text-base);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  background: var(--background-color);
  color: var(--text-primary);
  transition: var(--transition-fast);
  font-family: var(--font-primary);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-light);
}

/* 页脚 */
.footer {
  background: var(--primary-color);
  color: white;
  padding: var(--spacing-xl) 0;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-text p {
  font-size: var(--text-sm);
  opacity: 0.8;
}

.footer-social {
  display: flex;
  gap: var(--spacing-md);
}

.footer-social .social-link {
  background: rgba(255, 255, 255, 0.1);
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.footer-social .social-link:hover {
  background: white;
  color: var(--primary-color);
}

.friends {
  padding: calc(var(--spacing-xxl) * 1.5) 0;
  background: var(--background-color);
}

.friends-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-xl);
  align-items: stretch;
}

.friend-loading {
  grid-column: 1 / -1;
  text-align: center;
  color: var(--text-secondary);
}

.friend-card {
  display: grid;
  grid-template-columns: 3.5rem 1fr;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  background: var(--surface-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  transition: var(--transition-normal);
}

.friend-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.friend-logo {
  width: 3.5rem;
  height: 3.5rem;
  border-radius: 50%;
  object-fit: cover;
  background: white;
  border: 2px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.friend-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  justify-content: center;
}

.friend-title {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--primary-color);
  line-height: 1.4;
}

.friend-desc {
  font-size: var(--text-base);
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--spacing-sm);
}

.friend-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: fit-content;
  padding: 0.5rem 1rem;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: var(--transition-normal);
}

.friend-link:hover {
  background: var(--primary-color);
  color: white;
  transform: translateY(-2px);
}

.friend-apply {
  margin-top: var(--spacing-xxl);
  text-align: center;
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: var(--spacing-xl);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.apply-list {
  display: inline-block;
  text-align: left;
}

.apply-list ul {
  list-style: disc;
  padding-left: 1.25rem;
  margin-top: var(--spacing-sm);
}

.apply-list a {
  color: var(--primary-color);
  text-decoration: none;
  border-bottom: 1px solid var(--primary-color);
}

.apply-actions {
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
  margin-top: var(--spacing-md);
}

@media (max-width: 768px) {
  .friend-card {
    grid-template-columns: 2.75rem 1fr;
    padding: var(--spacing-lg);
  }
  .friend-logo {
    width: 2.75rem;
    height: 2.75rem;
  }
}

.footer-stats {
  font-size: var(--text-sm);
  opacity: 0.85;
  margin-top: var(--spacing-xs);
}

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

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

/* 响应式设计 */
@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    left: -100%;
    top: 4rem;
    flex-direction: column;
    background-color: white;
    width: 100%;
    text-align: center;
    transition: 0.3s;
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-lg) 0;
  }

  .nav-menu.active {
    left: 0;
  }

  .nav-toggle {
    display: flex;
  }

  .hero {
    padding: calc(4rem + var(--spacing-xl)) 0 var(--spacing-xl) 0;
  }

  .hero-container {
    grid-template-columns: 1fr;
    text-align: center;
    gap: var(--spacing-xl);
  }

  .hero-title {
    font-size: var(--text-4xl);
  }

  .hero-subtitle {
    font-size: var(--text-base);
  }

  .hero-description {
    font-size: var(--text-base);
  }

  .hero-buttons {
    justify-content: center;
  }

  .hero-social {
    justify-content: center;
    flex-wrap: wrap;
  }

  .image-wrapper {
    width: 15rem;
    height: 15rem;
  }

  .social-link {
    width: 2.5rem;
    height: 2.5rem;
  }

  .skills-content {
    grid-template-columns: 1fr;
  }

  .projects-grid {
    grid-template-columns: 1fr;
  }

  .contact-content {
    grid-template-columns: 1fr;
  }

  .footer-content {
    flex-direction: column;
    gap: var(--spacing-lg);
    text-align: center;
  }
}

@media (max-width: 768px) {
  .hero-content {
    text-align: center;
  }

  .hero-title {
    font-size: var(--text-3xl);
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    width: 100%;
    max-width: 200px;
  }

  .hero-social {
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
    margin-top: var(--spacing-lg);
  }

  .social-link {
    width: 3rem;
    height: 3rem;
    margin: 0.125rem;
  }

  .skills-grid {
    grid-template-columns: 1fr;
  }

  .projects-grid {
    grid-template-columns: 1fr;
  }

  .image-wrapper {
    width: 12rem;
    height: 12rem;
  }

  .profile-image {
    border-radius: var(--radius-lg);
  }

  .image-bg {
    top: 0.5rem;
    left: 0.5rem;
    border-radius: var(--radius-lg);
  }
}

/* 可访问性改进 */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* 焦点样式 */
*:focus {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
}

/* 打印样式 */
@media print {
  .navbar,
  .hero-social,
  .footer-social {
    display: none;
  }
  
  body {
    background: white;
    color: black;
  }
}