/* ========================================
   显示器校色仪 - 马赛克杂志风格样式
   主题色: #673ab7 (深紫色)
   ======================================== */

/* CSS 变量 */
:root {
  --accent-color: #673ab7;
  --accent-light: #9575cd;
  --accent-dark: #512da8;
  --text-primary: #212121;
  --text-secondary: #757575;
  --text-muted: #9e9e9e;
  --bg-primary: #ffffff;
  --bg-secondary: #f5f5f5;
  --bg-dark: #212121;
  --border-color: #e0e0e0;
  --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.15);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.2);
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --transition: all 0.3s ease;
}

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

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

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

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

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

ul {
  list-style: none;
}

/* ========================================
   页头 Header
   ======================================== */
.header {
  background: linear-gradient(135deg, var(--accent-dark) 0%, var(--accent-color) 100%);
  color: white;
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-md);
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: white;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-color);
  font-weight: bold;
}

.nav {
  display: flex;
  gap: 2rem;
}

.nav a {
  font-weight: 500;
  opacity: 0.9;
  position: relative;
}

.nav a:hover,
.nav a.active {
  opacity: 1;
}

.nav a.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: white;
  border-radius: 1px;
}

/* ========================================
   面包屑导航
   ======================================== */
.breadcrumb {
  background: var(--bg-primary);
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border-color);
}

.breadcrumb-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.breadcrumb a {
  color: var(--accent-color);
}

.breadcrumb a:hover {
  text-decoration: underline;
}

.breadcrumb span {
  margin: 0 0.5rem;
  color: var(--text-muted);
}

/* ========================================
   主容器
   ======================================== */
.main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

/* ========================================
   马赛克网格布局
   ======================================== */
.mosaic-grid {
  display: grid;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

/* 首页网格 */
.home-grid {
  grid-template-columns: 2fr 1fr;
  grid-template-rows: auto auto auto;
  grid-template-areas:
    "headline sidebar"
    "feature stories"
    "feature stories2";
}

.headline-area {
  grid-area: headline;
}

.sidebar-area {
  grid-area: sidebar;
}

.feature-area {
  grid-area: feature;
}

.stories-area {
  grid-area: stories;
}

.stories-area-2 {
  grid-area: stories2;
}

/* 分类页网格 */
.category-grid {
  grid-template-columns: 1fr 1fr 1fr;
  grid-template-rows: auto auto auto;
  grid-template-areas:
    "hero hero sidebar"
    "lead item1 item2"
    "item3 item4 item5";
}

.category-hero {
  grid-area: hero;
}

.category-sidebar {
  grid-area: sidebar;
}

.lead-story {
  grid-area: lead;
}

/* 文章页布局 */
.article-layout {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 2rem;
}

.article-main {
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
}

.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* ========================================
   卡片组件
   ======================================== */
.card {
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  height: 100%;
  display: flex;
  flex-direction: column;
}

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

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

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

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

.card-category {
  position: absolute;
  top: 1rem;
  left: 1rem;
  background: var(--accent-color);
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.card-content {
  padding: 1.25rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.card-title {
  font-size: 1.125rem;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.card:hover .card-title {
  color: var(--accent-color);
}

.card-excerpt {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1rem;
  flex: 1;
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* 大卡片 */
.card-large .card-image {
  height: 300px;
}

.card-large .card-title {
  font-size: 1.5rem;
}

/* 中卡片 */
.card-medium .card-image {
  height: 200px;
}

.card-medium .card-title {
  font-size: 1.25rem;
}

/* 小卡片 */
.card-small {
  flex-direction: row;
  align-items: center;
}

.card-small .card-image {
  width: 100px;
  height: 100px;
  flex-shrink: 0;
}

.card-small .card-content {
  padding: 0.75rem 1rem;
}

.card-small .card-title {
  font-size: 0.9375rem;
  margin-bottom: 0.25rem;
}

/* 特色卡片 */
.featured-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  height: 100%;
  min-height: 400px;
}

.featured-card .card-image {
  position: absolute;
  inset: 0;
  height: 100%;
}

.featured-card .card-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.8) 0%, rgba(0,0,0,0.3) 50%, transparent 100%);
}

.featured-card .card-content {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 2rem;
  color: white;
  z-index: 1;
}

.featured-card .card-title {
  color: white;
  font-size: 1.75rem;
  margin-bottom: 0.75rem;
}

.featured-card:hover .card-title {
  color: var(--accent-light);
}

.featured-card .card-excerpt {
  color: rgba(255,255,255,0.8);
  font-size: 1rem;
}

/* ========================================
   侧边栏组件
   ======================================== */
.sidebar-widget {
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.widget-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--accent-color);
  color: var(--text-primary);
}

.widget-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.widget-item {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
}

.widget-item-number {
  width: 24px;
  height: 24px;
  background: var(--accent-color);
  color: white;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 600;
  flex-shrink: 0;
}

.widget-item-number.secondary {
  background: var(--bg-secondary);
  color: var(--text-secondary);
}

.widget-item-content {
  flex: 1;
}

.widget-item-title {
  font-size: 0.9375rem;
  font-weight: 500;
  line-height: 1.4;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.widget-item-title:hover {
  color: var(--accent-color);
}

.widget-item-meta {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* 标签云 */
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tag {
  background: var(--bg-secondary);
  color: var(--text-secondary);
  padding: 0.375rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.8125rem;
  transition: var(--transition);
}

.tag:hover {
  background: var(--accent-color);
  color: white;
}

/* ========================================
   文章详情页
   ======================================== */
.article-header {
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

.article-category {
  display: inline-block;
  background: var(--accent-color);
  color: white;
  padding: 0.375rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.8125rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.article-title {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.article-meta-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.article-image {
  width: 100%;
  border-radius: var(--radius-md);
  margin-bottom: 2rem;
  overflow: hidden;
}

.article-image img {
  width: 100%;
  height: auto;
}

.article-body {
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--text-primary);
}

.article-body h2 {
  font-size: 1.5rem;
  font-weight: 600;
  margin: 2rem 0 1rem;
  color: var(--text-primary);
}

.article-body h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 1.5rem 0 0.75rem;
  color: var(--text-primary);
}

.article-body p {
  margin-bottom: 1.25rem;
}

.article-body ul,
.article-body ol {
  margin-bottom: 1.25rem;
  padding-left: 1.5rem;
}

.article-body ul {
  list-style: disc;
}

.article-body ol {
  list-style: decimal;
}

.article-body li {
  margin-bottom: 0.5rem;
}

.article-body strong {
  font-weight: 600;
  color: var(--accent-dark);
}

/* ========================================
   作者信息
   ======================================== */
.author-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.5rem;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  margin-bottom: 1.5rem;
}

.author-avatar {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--accent-color);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.5rem;
  font-weight: 600;
  flex-shrink: 0;
}

.author-info {
  flex: 1;
}

.author-name {
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.author-bio {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* ========================================
   推荐文章区域
   ======================================== */
.recommended-section {
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  padding: 2rem;
  margin-top: 2rem;
  box-shadow: var(--shadow-sm);
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.section-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  position: relative;
  padding-left: 1rem;
}

.section-title::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 20px;
  background: var(--accent-color);
  border-radius: 2px;
}

.view-all {
  color: var(--accent-color);
  font-size: 0.875rem;
  font-weight: 500;
}

.view-all:hover {
  text-decoration: underline;
}

/* 三栏推荐 */
.recommended-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

/* ========================================
   404 页面
   ======================================== */
.error-page {
  min-height: 60vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 4rem 1.5rem;
}

.error-code {
  font-size: 8rem;
  font-weight: 700;
  color: var(--accent-color);
  line-height: 1;
  margin-bottom: 1rem;
  opacity: 0.8;
}

.error-title {
  font-size: 1.75rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.error-message {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  max-width: 400px;
}

.error-actions {
  display: flex;
  gap: 1rem;
}

/* ========================================
   按钮
   ======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  font-weight: 500;
  transition: var(--transition);
  border: none;
  cursor: pointer;
  font-size: 0.9375rem;
}

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

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

.btn-secondary {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

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

/* ========================================
   页脚
   ======================================== */
.footer {
  background: var(--bg-dark);
  color: white;
  padding: 3rem 0 1.5rem;
  margin-top: 3rem;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-brand {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.footer-desc {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.7);
  line-height: 1.6;
}

.footer-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-links a {
  color: rgba(255,255,255,0.7);
  font-size: 0.875rem;
}

.footer-links a:hover {
  color: white;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 1.5rem;
  text-align: center;
  font-size: 0.875rem;
  color: rgba(255,255,255,0.5);
}

/* ========================================
   响应式设计
   ======================================== */
@media (max-width: 1024px) {
  .home-grid {
    grid-template-columns: 1fr;
    grid-template-areas:
      "headline"
      "sidebar"
      "feature"
      "stories"
      "stories2";
  }

  .category-grid {
    grid-template-columns: 1fr 1fr;
    grid-template-areas:
      "hero hero"
      "sidebar sidebar"
      "lead item1"
      "item2 item3"
      "item4 item5";
  }

  .article-layout {
    grid-template-columns: 1fr;
  }

  .article-sidebar {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

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

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

@media (max-width: 768px) {
  .header-container {
    flex-direction: column;
    gap: 1rem;
  }

  .nav {
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
  }

  .mosaic-grid {
    grid-template-columns: 1fr;
    grid-template-areas: none;
  }

  .mosaic-grid > * {
    grid-area: auto !important;
  }

  .category-grid {
    grid-template-columns: 1fr;
    grid-template-areas:
      "hero"
      "sidebar"
      "lead"
      "item1"
      "item2"
      "item3"
      "item4"
      "item5";
  }

  .article-sidebar {
    grid-template-columns: 1fr;
  }

  .article-title {
    font-size: 1.5rem;
  }

  .card-small {
    flex-direction: column;
  }

  .card-small .card-image {
    width: 100%;
    height: 150px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .error-code {
    font-size: 5rem;
  }
}

@media (max-width: 480px) {
  .main {
    padding: 1rem;
  }

  .card-content {
    padding: 1rem;
  }

  .sidebar-widget {
    padding: 1rem;
  }

  .article-main {
    padding: 1rem;
  }

  .article-meta {
    flex-wrap: wrap;
    gap: 0.75rem;
  }

  .error-actions {
    flex-direction: column;
    width: 100%;
    padding: 0 1rem;
  }

  .error-actions .btn {
    width: 100%;
  }
}