/* 暗夜星辰主题 - 2023 */
:root {
  /* 主色调 - 星空色系 */
  --primary-color: #8e6bff;
  --primary-hover: #a78bff;
  --primary-dark: #6a4cbf;
  --secondary-color: #00d4ff;
  --secondary-hover: #33deff;
  --accent-color: #ff5e7d;
  
  /* 中性色调 - 深空系 */
  --bg-color: #0f1729;
  --card-bg: #1a2236;
  --card-bg-hover: #232c42;
  --border-color: #2a3552;
  --text-color: #e2e8f0;
  --text-muted: #94a3b8;
  --text-light: #cbd5e1;
  
  /* 阴影和圆角 */
  --shadow-sm: 0 4px 6px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 12px 24px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 15px rgba(142, 107, 255, 0.4);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  
  /* 动画 */
  --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: all 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
  
  /* 布局 */
  --max-width: 1200px;
  --header-height: 70px;
  --content-padding: 24px;
  --section-spacing: 48px;
  --card-spacing: 24px;
}

/* 基础重置 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

/* 星空背景效果 */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    radial-gradient(1px 1px at 25% 15%, rgba(255, 255, 255, 0.5), transparent),
    radial-gradient(1px 1px at 50% 40%, rgba(255, 255, 255, 0.4), transparent),
    radial-gradient(1.5px 1.5px at 75% 25%, rgba(255, 255, 255, 0.5), transparent),
    radial-gradient(1.5px 1.5px at 10% 60%, rgba(255, 255, 255, 0.6), transparent),
    radial-gradient(2px 2px at 90% 70%, rgba(255, 255, 255, 0.5), transparent);
  background-size: 100% 100%;
  background-repeat: no-repeat;
  z-index: -1;
  opacity: 0.2;
}

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

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

img {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-sm);
}

ul, ol {
  list-style: none;
}

/* 布局容器 */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--content-padding);
}

/* 头部样式 */
header {
  background-color: rgba(15, 23, 41, 0.8);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  height: var(--header-height);
  display: flex;
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
}

.logo a {
  font-size: 1.5rem;
  font-weight: 700;
  background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-fill-color: transparent;
  letter-spacing: -0.5px;
  position: relative;
}

.logo a::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
  transform: scaleX(0);
  transform-origin: left;
  transition: var(--transition);
}

.logo a:hover::after {
  transform: scaleX(1);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.search-form {
  position: relative;
}

.search-form input {
  background-color: rgba(42, 53, 82, 0.5);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  padding: 10px 16px 10px 40px;
  color: var(--text-color);
  font-size: 0.9rem;
  width: 220px;
  transition: var(--transition-fast);
}

.search-form input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: var(--shadow-glow);
  width: 260px;
}

.search-form button {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-color);
  cursor: pointer;
  width: 32px;
  height: 32px;
  position: relative;
  z-index: 99; 
}

/* 导航栏 */
nav {
  margin-top: var(--header-height);
  padding: 16px 0;
  border-bottom: 1px solid var(--border-color);
  background-color: rgba(15, 23, 41, 0.7);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.nav-container {
  display: flex;
  align-items: center;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  padding-bottom: 4px;
}

.nav-container::-webkit-scrollbar {
  display: none;
}

.nav-item {
  display: inline-flex;
  align-items: center;
  padding: 8px 16px;
  margin-right: 8px;
  color: var(--text-light);
  font-size: 0.95rem;
  font-weight: 500;
  border-radius: var(--radius-full);
  white-space: nowrap;
  transition: var(--transition-bounce);
  border: 1px solid transparent;
}

.nav-item:hover {
  background-color: var(--card-bg-hover);
  color: var(--primary-hover);
  transform: translateY(-2px);
  border-color: var(--border-color);
}

.nav-item .icon {
  margin-right: 8px;
}

.nav-item.active {
  background-color: var(--primary-dark);
  color: white;
  border-color: var(--primary-color);
}

/* 主内容区 */
main {
  
  padding-bottom: var(--section-spacing);
}

/* 英雄区域 */
.hero-section {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: var(--section-spacing);
  padding: 60px 40px;
  text-align: center;
  background: linear-gradient(135deg, rgba(26, 34, 54, 0.9), rgba(15, 23, 41, 0.9));
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-color);
}

.hero-section::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(circle at 20% 30%, rgba(142, 107, 255, 0.15), transparent 25%),
    radial-gradient(circle at 80% 70%, rgba(0, 212, 255, 0.15), transparent 25%);
  z-index: -1;
}

.hero-content h1 {
  font-size: 2.75rem;
  font-weight: 800;
  margin-bottom: 16px;
  background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-fill-color: transparent;
  line-height: 1.2;
}

.hero-content p {
  font-size: 1.1rem;
  color: var(--text-light);
  max-width: 700px;
  margin: 0 auto;
}

/* 分类标题 */
.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.section-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-color);
  display: flex;
  align-items: center;
  position: relative;
  padding-left: 16px;
}

.section-title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 24px;
  background: linear-gradient(to bottom, var(--primary-color), var(--secondary-color));
  border-radius: 4px;
}

.section-title .icon {
  margin-right: 8px;
  color: var(--primary-color);
}

.view-more {
  display: flex;
  align-items: center;
  color: var(--primary-color);
  font-size: 0.9rem;
  font-weight: 500;
  transition: var(--transition);
}

.view-more .icon {
  margin-left: 4px;
  transition: transform 0.2s ease;
}

.view-more:hover {
  color: var(--primary-hover);
}

.view-more:hover .icon {
  transform: translateX(4px);
}

/* 文章网格 */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--card-spacing);
  margin-bottom: var(--section-spacing);
}

/* 文章卡片 */
.article-card {
  background-color: var(--card-bg);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-bounce);
  border: 1px solid var(--border-color);
  height: 100%;
  display: flex;
  flex-direction: column;
  position: relative;
}

.article-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  border-color: var(--primary-dark);
  background-color: var(--card-bg-hover);
}

.article-image {
  position: relative;
  overflow: hidden;
}

.article-image img {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
  transition: transform 0.5s ease;
}

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

.article-content {
  padding: 20px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.article-title {
  margin-bottom: 12px;
  line-height: 1.4;
}

.article-title a {
  color: var(--text-color);
  font-size: 1.15rem;
  font-weight: 600;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: var(--transition);
}

.article-card:hover .article-title a {
  color: var(--primary-hover);
}

.article-date {
  display: flex;
  align-items: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-top: auto;
}

.article-date .icon {
  margin-right: 6px;
}

/* 分页 */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 40px;
}

.page-link {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-width: 40px;
  height: 40px;
  padding: 0 12px;
  border-radius: var(--radius-md);
  background-color: var(--card-bg);
  color: var(--text-color);
  font-weight: 500;
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.page-link:hover {
  background-color: var(--card-bg-hover);
  color: var(--primary-color);
  border-color: var(--primary-dark);
  transform: translateY(-2px);
}

.page-link.active {
  background-color: var(--primary-color);
  color: white;
  border-color: var(--primary-dark);
}

/* 文章详情页 */
.post-article {
  background-color: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-md);
  margin-bottom: 40px;
  border: 1px solid var(--border-color);
}

.article-header {
  margin-bottom: 24px;
}

.post-article h1 {
  font-size: 2rem;
  margin-bottom: 16px;
  line-height: 1.3;
  color: var(--text-color);
  font-weight: 700;
}

.article-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 16px;
}

.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.article-tag {
  display: inline-block;
  padding: 6px 12px;
  background-color: rgba(142, 107, 255, 0.15);
  color: var(--primary-color);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 500;
  transition: var(--transition);
  border: 1px solid rgba(142, 107, 255, 0.3);
}

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

.article-featured-image {
  margin: 24px -40px;
  position: relative;
}

.article-featured-image img {
  width: 100%;
  max-height: 500px;
  object-fit: cover;
  border-radius: 0;
}

.article-content {
  line-height: 1.8;
  color: var(--text-light);
}

.article-content p {
  margin-bottom: 20px;
  font-size: 1.05rem;
}

.article-content a {
  color: var(--primary-color);
  font-weight: 500;
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 2px;
  text-decoration-color: rgba(142, 107, 255, 0.3);
}

.article-content a:hover {
  color: var(--primary-hover);
  text-decoration-color: var(--primary-color);
}

/* 页脚 */
footer {
  background-color: rgba(15, 23, 41, 0.9);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-top: 1px solid var(--border-color);
  padding: 60px 0 30px;
  margin-top: var(--section-spacing);
}

.footer-content {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.footer-top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 40px;
}

.footer-logo {
  flex: 1;
  min-width: 250px;
}

.footer-logo h2 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 16px;
  background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-fill-color: transparent;
}

.footer-logo p {
  color: var(--text-muted);
  font-size: 1rem;
  max-width: 300px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
}

.footer-links-column h3 {
  font-size: 1.1rem;
  color: var(--text-color);
  margin-bottom: 16px;
  font-weight: 600;
  position: relative;
  display: inline-block;
}

.footer-links-column h3::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 40px;
  height: 2px;
  background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
}

.footer-links-column ul li {
  margin-bottom: 12px;
}

.footer-links-column ul li a {
  color: var(--text-muted);
  font-size: 0.95rem;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
}

.footer-links-column ul li a:hover {
  color: var(--primary-hover);
  transform: translateX(4px);
}

.footer-bottom {
  text-align: center;
  padding-top: 30px;
  border-top: 1px solid var(--border-color);
}

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

/* 响应式设计 */
@media (max-width: 1140px) {
  :root {
    --max-width: 100%;
  }
}