/* ===== CSS 变量定义 ===== */
:root {
  /* 暖色调主题 */
  --primary-color: #e8915a;
  --primary-dark: #d4783f;
  --secondary-color: #6b9080;
  --accent-color: #a4c3b2;

  /* 背景色 */
  --bg-primary: #fef9f3;
  --bg-secondary: #fff5eb;
  --bg-card: #ffffff;

  /* 文字颜色 */
  --text-primary: #2d3436;
  --text-secondary: #636e72;
  --text-light: #b2bec3;

  /* 边框和阴影 */
  --border-color: #f0e6dc;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);

  /* 圆角 */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 50%;

  /* 过渡 */
  --transition: all 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ===== 导航栏 ===== */
.navbar {
  background-color: var(--bg-card);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 20px;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
  text-decoration: none;
  transition: var(--transition);
}

.logo:hover {
  color: var(--primary-dark);
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
  padding: 0.5rem 0;
  position: relative;
}

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

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

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

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-primary);
  cursor: pointer;
}

/* ===== Hero 区域 ===== */
.hero {
  padding: 5rem 0;
  background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.hero-text h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.highlight {
  color: var(--primary-color);
}

.subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.description {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  line-height: 1.8;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 0.875rem 2rem;
  border-radius: var(--radius-md);
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition);
  border: 2px solid transparent;
}

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

.btn-primary:hover {
  background-color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

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

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

.hero-image {
  display: flex;
  justify-content: center;
  align-items: center;
}

.avatar-placeholder {
  width: 280px;
  height: 280px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  display: flex;
  justify-content: center;
  align-items: center;
  box-shadow: var(--shadow-lg);
}

.avatar-placeholder i {
  font-size: 6rem;
  color: white;
}

/* ===== 关于我区域 ===== */
.about {
  padding: 5rem 0;
  background-color: var(--bg-card);
}

.section-title {
  text-align: center;
  font-size: 2rem;
  margin-bottom: 3rem;
  color: var(--text-primary);
}

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

.about-card {
  background-color: var(--bg-primary);
  padding: 2rem;
  border-radius: var(--radius-lg);
  text-align: center;
  transition: var(--transition);
}

.about-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.about-card i {
  font-size: 2.5rem;
  color: var(--primary-color);
  margin-bottom: 1rem;
}

.about-card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.about-card p {
  color: var(--text-secondary);
}

/* ===== 联系方式区域 ===== */
.contact {
  padding: 5rem 0;
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

.contact-description {
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.social-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
}

.social-link {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  padding: 1.5rem 2rem;
  background-color: var(--bg-card);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: var(--text-primary);
  transition: var(--transition);
  min-width: 120px;
}

.social-link:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  color: var(--primary-color);
}

.social-link i {
  font-size: 2rem;
}

.social-link span {
  font-size: 0.9rem;
  font-weight: 500;
}

/* ===== 页脚 ===== */
.footer {
  background-color: var(--text-primary);
  color: var(--text-light);
  padding: 2rem 0;
  text-align: center;
}

.footer p {
  margin: 0.5rem 0;
}

.footer i {
  color: var(--primary-color);
}

.icp-info {
  margin-top: 1rem;
  font-size: 0.85rem;
  line-height: 1.5;
}

.icp-info img {
  vertical-align: middle;
  margin-right: 4px;
  width: 16px;
  height: 15px;
}

.icp-info a {
  color: var(--text-light);
  text-decoration: none;
  transition: var(--transition);
}

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

/* ===== 代码片段页面 ===== */
.page-header {
  padding: 3rem 0;
  background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
  text-align: center;
}

.page-header h1 {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.page-header p {
  color: var(--text-secondary);
  font-size: 1.1rem;
}

/* 搜索区域 */
.search-section {
  padding: 2rem 0;
  background-color: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
}

.search-container {
  position: relative;
  max-width: 600px;
  margin: 0 auto 1.5rem;
}

.search-input {
  width: 100%;
  padding: 1rem 3rem 1rem 1.5rem;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 1rem;
  background-color: var(--bg-primary);
  transition: var(--transition);
}

.search-input:focus {
  outline: none;
  border-color: var(--primary-color);
}

.search-icon {
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-light);
}

.filter-tags {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.filter-tag {
  padding: 0.5rem 1.25rem;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-sm);
  background-color: var(--bg-primary);
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
  font-size: 0.9rem;
}

.filter-tag:hover {
  border-color: var(--primary-color);
  color: var(--primary-color);
}

.filter-tag.active {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
  color: white;
}

/* 代码片段网格 */
.snippets-section {
  padding: 3rem 0;
  min-height: 400px;
}

.snippets-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 1.5rem;
}

.snippet-card {
  background-color: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  cursor: pointer;
  border: 2px solid transparent;
}

.snippet-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-color);
}

.snippet-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1rem;
}

.snippet-title {
  font-size: 1.1rem;
  color: var(--text-primary);
  margin: 0;
}

.snippet-category {
  padding: 0.25rem 0.75rem;
  background-color: var(--bg-secondary);
  color: var(--primary-color);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
}

.snippet-description {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 1rem;
}

.snippet-preview {
  background-color: #2d2d2d;
  border-radius: var(--radius-sm);
  padding: 1rem;
  overflow-x: auto;
  max-height: 150px;
}

.snippet-preview code {
  font-family: 'Consolas', 'Monaco', monospace;
  font-size: 0.85rem;
  color: #f8f8f2;
  white-space: pre;
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
}

.snippet-tags {
  display: flex;
  gap: 0.5rem;
  margin-top: 1rem;
  flex-wrap: wrap;
}

.snippet-tag {
  padding: 0.25rem 0.5rem;
  background-color: var(--bg-primary);
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
}

.no-results {
  text-align: center;
  padding: 3rem;
  color: var(--text-light);
}

.no-results i {
  font-size: 3rem;
  margin-bottom: 1rem;
}

/* 模态框 */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.7);
  z-index: 2000;
  justify-content: center;
  align-items: center;
  padding: 2rem;
}

.modal.active {
  display: flex;
}

.modal-content {
  background-color: var(--bg-card);
  border-radius: var(--radius-lg);
  max-width: 900px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
  color: var(--text-primary);
  margin: 0;
}

.modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
}

.modal-close:hover {
  color: var(--primary-color);
}

.modal-body {
  padding: 1.5rem;
}

.modal-body > p {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.code-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.code-header span {
  padding: 0.25rem 0.75rem;
  background-color: var(--bg-secondary);
  color: var(--primary-color);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
}

.copy-btn {
  padding: 0.5rem 1rem;
  background-color: var(--primary-color);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  font-size: 0.9rem;
}

.copy-btn:hover {
  background-color: var(--primary-dark);
}

.copy-btn.copied {
  background-color: var(--secondary-color);
}

pre {
  margin: 0 !important;
  border-radius: var(--radius-sm) !important;
  max-height: 500px;
  overflow: auto !important;
}

/* ===== 响应式设计 ===== */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: var(--bg-card);
    flex-direction: column;
    padding: 1rem;
    box-shadow: var(--shadow-md);
    gap: 0;
  }

  .nav-links.active {
    display: flex;
  }

  .nav-links li {
    width: 100%;
  }

  .nav-links a {
    display: block;
    padding: 0.75rem 0;
  }

  .mobile-menu-btn {
    display: block;
  }

  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 2rem;
  }

  .hero-text h1 {
    font-size: 2rem;
  }

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

  .avatar-placeholder {
    width: 200px;
    height: 200px;
  }

  .avatar-placeholder i {
    font-size: 4rem;
  }

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

  .social-links {
    gap: 1rem;
  }

  .social-link {
    min-width: 100px;
    padding: 1rem 1.5rem;
  }

  .modal {
    padding: 1rem;
  }
}

@media (max-width: 480px) {
  .hero-text h1 {
    font-size: 1.75rem;
  }

  .page-header h1 {
    font-size: 1.75rem;
  }

  .btn {
    width: 100%;
    text-align: center;
  }
}