/* ==================== 基础变量 ==================== */
:root {
  /* 主色调 */
  --primary: #6366f1;
  --primary-light: #818cf8;
  --primary-dark: #4f46e5;
  --accent: #06b6d4;
  --accent-light: #22d3ee;
  
  /* 背景色 */
  --bg-deep: #0a0f1a;
  --bg-dark: #0d1117;
  --bg-card: rgba(255, 255, 255, 0.03);
  --bg-card-hover: rgba(255, 255, 255, 0.06);
  
  /* 文字色 */
  --text-primary: #e6edf3;
  --text-secondary: #8b949e;
  --text-muted: #484f58;
  --text-accent: #58a6ff;
  
  /* 玻璃效果 */
  --glass-bg: rgba(255, 255, 255, 0.04);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  --glass-blur: blur(20px);
  
  /* 圆角 */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 100px;
  
  /* 间距 */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  
  /* 字体 */
  --font-sans: 'Noto Serif SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  
  /* 过渡 */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

/* ==================== 重置样式 ==================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-sans);
  background: var(--bg-deep);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
}

a {
  text-decoration: none;
  color: inherit;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--primary-light);
}

img {
  max-width: 100%;
  height: auto;
}

/* ==================== 背景层 ==================== */
.bg-layer {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  overflow: hidden;
}

.bg-gradient {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(ellipse at 20% 50%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(6, 182, 212, 0.1) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 80%, rgba(139, 92, 246, 0.08) 0%, transparent 50%),
    linear-gradient(180deg, var(--bg-deep) 0%, #0d1525 50%, var(--bg-deep) 100%);
}

.bg-particles {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.particle {
  position: absolute;
  width: 2px;
  height: 2px;
  background: rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  animation: float linear infinite;
}

@keyframes float {
  0% {
    transform: translateY(100vh) rotate(0deg);
    opacity: 0;
  }
  10% {
    opacity: 1;
  }
  90% {
    opacity: 1;
  }
  100% {
    transform: translateY(-100px) rotate(720deg);
    opacity: 0;
  }
}

.bg-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    linear-gradient(90deg, transparent 0%, rgba(255, 255, 255, 0.01) 50%, transparent 100%);
  pointer-events: none;
}

/* ==================== 毛玻璃卡片 ==================== */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--glass-shadow);
  transition: all var(--transition-normal);
}

.glass-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(255, 255, 255, 0.12);
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
}

/* ==================== 容器 ==================== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
  position: relative;
}

/* ==================== 导航栏 ==================== */
.nav {
  position: fixed;
  top: var(--space-lg);
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-xl);
  max-width: 1200px;
  width: calc(100% - var(--space-xl) * 2);
  border-radius: var(--radius-full);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.logo-icon {
  font-size: 1.5rem;
}

.logo-text {
  font-size: 1.1rem;
  font-weight: 600;
  background: linear-gradient(135deg, var(--primary-light), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.nav-link {
  font-size: 0.9rem;
  color: var(--text-secondary);
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.06);
}

/* ==================== Hero 区域 ==================== */
.hero-section {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
  padding-top: 120px;
}

.hero-content {
  padding: var(--space-3xl);
}

.hero-tag {
  display: inline-block;
  padding: var(--space-xs) var(--space-md);
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.2);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  color: var(--primary-light);
  margin-bottom: var(--space-xl);
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--space-xl);
}

.title-line {
  display: block;
}

.title-line.accent {
  background: linear-gradient(135deg, var(--primary-light), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: var(--space-xl);
}

.hero-actions {
  display: flex;
  gap: var(--space-md);
}

.hero-visual {
  display: flex;
  justify-content: center;
}

/* ==================== 按钮 ==================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-md) var(--space-xl);
  font-size: 0.95rem;
  font-weight: 500;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-normal);
  border: none;
  font-family: var(--font-sans);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 30px rgba(99, 102, 241, 0.4);
  color: white;
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--glass-border);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.15);
  color: var(--text-primary);
}

.btn-full {
  width: 100%;
}

/* ==================== 代码窗口 ==================== */
.code-window {
  width: 100%;
  max-width: 500px;
  overflow: hidden;
}

.window-header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
  background: rgba(0, 0, 0, 0.3);
  border-bottom: 1px solid var(--glass-border);
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.dot.red { background: #ff5f57; }
.dot.yellow { background: #ffbd2e; }
.dot.green { background: #28ca42; }

.window-title {
  margin-left: var(--space-md);
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-family: var(--font-mono);
}

.code-content {
  padding: var(--space-lg);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  line-height: 1.8;
  overflow-x: auto;
}

.code-content code {
  font-family: inherit;
}

.keyword { color: #c678dd; }
.type { color: #e5c07b; }
.string { color: #98c379; }
.method { color: #61afef; }
.comment { color: #5c6370; font-style: italic; }
.classname { color: #e5c07b; }

/* ==================== 区域标题 ==================== */
.section-header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: var(--space-md);
  background: linear-gradient(135deg, var(--text-primary), var(--text-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
}

/* ==================== 关于区域 ==================== */
.about-section {
  padding: var(--space-3xl) 0;
}

.about-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
}

.about-card {
  padding: var(--space-xl);
  text-align: center;
}

.card-icon {
  font-size: 2.5rem;
  margin-bottom: var(--space-md);
}

.about-card h3 {
  font-size: 1.2rem;
  margin-bottom: var(--space-sm);
  color: var(--text-primary);
}

.about-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ==================== 代码作品区域 ==================== */
.code-section {
  padding: var(--space-3xl) 0;
}

.code-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.code-card {
  padding: var(--space-xl);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-md);
}

.card-tag {
  padding: var(--space-xs) var(--space-md);
  background: rgba(99, 102, 241, 0.1);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  color: var(--primary-light);
}

.card-date {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.code-card h3 {
  font-size: 1.3rem;
  margin-bottom: var(--space-sm);
  color: var(--text-primary);
}

.code-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--space-md);
}

.card-tech {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.tech-tag {
  padding: var(--space-xs) var(--space-sm);
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

/* ==================== 随笔区域 ==================== */
.blog-section {
  padding: var(--space-3xl) 0;
}

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

.blog-item {
  display: flex;
  gap: var(--space-xl);
  padding: var(--space-xl);
}

.blog-date {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-width: 80px;
  padding: var(--space-md);
  background: rgba(99, 102, 241, 0.1);
  border-radius: var(--radius-md);
}

.blog-date .day {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary-light);
  line-height: 1;
}

.blog-date .month {
  font-size: 0.85rem;
  color: var(--text-secondary);
  text-transform: uppercase;
}

.blog-content {
  flex: 1;
}

.blog-content h3 {
  font-size: 1.3rem;
  margin-bottom: var(--space-sm);
  color: var(--text-primary);
}

.blog-content p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--space-md);
}

.blog-meta {
  display: flex;
  gap: var(--space-md);
}

.meta-item {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ==================== 联系区域 ==================== */
.contact-section {
  padding: var(--space-3xl) 0;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
}

.contact-info,
.contact-form {
  padding: var(--space-xl);
}

.contact-info h3,
.contact-form h3 {
  font-size: 1.5rem;
  margin-bottom: var(--space-xl);
  color: var(--text-primary);
}

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

.info-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.info-icon {
  font-size: 1.5rem;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(99, 102, 241, 0.1);
  border-radius: var(--radius-md);
}

.info-label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: var(--space-xs);
}

.info-value {
  font-size: 1rem;
  color: var(--text-primary);
}

.form-group {
  margin-bottom: var(--space-md);
}

.form-input,
.form-textarea {
  width: 100%;
  padding: var(--space-md);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.95rem;
  font-family: var(--font-sans);
  transition: all var(--transition-fast);
  outline: none;
}

.form-input:focus,
.form-textarea:focus {
  border-color: var(--primary);
  background: rgba(255, 255, 255, 0.08);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

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

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

/* ==================== 页脚 ==================== */
.footer {
  margin-top: var(--space-3xl);
  padding: var(--space-xl);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

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

.footer-left {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.footer-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.footer-icp {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer-icp a {
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.footer-icp a:hover {
  color: var(--primary-light);
}

.footer-links {
  display: flex;
  gap: var(--space-lg);
}

.footer-link {
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

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

/* ==================== 响应式设计 ==================== */
@media (max-width: 1024px) {
  .hero-section {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
    padding-top: 100px;
  }
  
  .hero-visual {
    order: -1;
  }
  
  .about-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .code-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  :root {
    font-size: 14px;
  }
  
  .nav {
    top: var(--space-md);
    padding: var(--space-sm) var(--space-md);
    width: calc(100% - var(--space-md) * 2);
  }
  
  .nav-links {
    display: none;
  }
  
  .hero-section {
    padding-top: 80px;
    min-height: auto;
    padding-bottom: var(--space-3xl);
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .about-grid {
    grid-template-columns: 1fr;
  }
  
  .code-grid {
    grid-template-columns: 1fr;
  }
  
  .blog-item {
    flex-direction: column;
    gap: var(--space-md);
  }
  
  .blog-date {
    flex-direction: row;
    gap: var(--space-md);
    min-width: auto;
  }
  
  .contact-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    flex-direction: column;
    gap: var(--space-md);
    text-align: center;
  }
  
  .footer-left {
    align-items: center;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2rem;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .hero-actions {
    flex-direction: column;
  }
  
  .btn {
    width: 100%;
    justify-content: center;
  }
}

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

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

.hero-visual {
  animation: fadeInUp 0.8s ease-out 0.2s both;
}

/* 滚动动画类 */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s ease-out;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ==================== 滚动条样式 ==================== */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* ==================== 选中样式 ==================== */
::selection {
  background: rgba(99, 102, 241, 0.3);
  color: white;
}