/* ========================================
   摩托车赛事 - 马赛克杂志风格样式
   主色调: #673ab7 (紫色)
   ======================================== */

/* CSS 变量定义 */
:root {
  --accent-color: #673ab7;
  --accent-dark: #512da8;
  --accent-light: #9575cd;
  --text-primary: #212121;
  --text-secondary: #757575;
  --text-light: #ffffff;
  --bg-primary: #ffffff;
  --bg-secondary: #f5f5f5;
  --bg-dark: #1a1a2e;
  --border-color: #e0e0e0;
  --shadow: 0 2px 8px rgba(0,0,0,0.1);
  --shadow-hover: 0 4px 16px rgba(0,0,0,0.15);
  --radius: 4px;
  --radius-lg: 8px;
  --max-width: 1200px;
  --gap: 20px;
  --gap-lg: 30px;
}

/* 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-primary);
}

a {
  text-decoration: none;
  color: inherit;
  transition: color 0.3s ease;
}

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

ul {
  list-style: none;
}

/* ========================================
   通用组件
   ======================================== */

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

.section-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  padding-bottom: 0.75rem;
  border-bottom: 3px solid var(--accent-color);
  margin-bottom: 1rem;
  display: inline-block;
}

.card {
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

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

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

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

.card-content {
  padding: 1rem;
}

.card-category {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--accent-color);
  margin-bottom: 0.5rem;
}

.card-title {
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

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

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

.badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius);
  text-transform: uppercase;
}

.badge-primary {
  background: var(--accent-color);
  color: var(--text-light);
}

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

/* ========================================
   Header 页头
   ======================================== */

.header {
  background: var(--bg-dark);
  color: var(--text-light);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--gap);
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-light);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: var(--accent-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

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

.nav-link {
  font-size: 0.9375rem;
  font-weight: 500;
  color: rgba(255,255,255,0.85);
  padding: 0.5rem 0;
  position: relative;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-color);
  transition: width 0.3s ease;
}

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

/* ========================================
   Breadcrumb 面包屑
   ======================================== */

.breadcrumb {
  background: var(--bg-secondary);
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border-color);
}

.breadcrumb-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--gap);
  font-size: 0.875rem;
  color: var(--text-secondary);
}

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

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

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

/* ========================================
   首页布局 - 杂志非对称布局
   ======================================== */

.hero-section {
  padding: var(--gap-lg) 0;
}

.hero-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--gap);
  margin-bottom: var(--gap-lg);
}

.headline-card {
  position: relative;
  height: 400px;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.headline-card .card-image {
  height: 100%;
}

.headline-card .card-image img {
  height: 100%;
}

.headline-card .card-content {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(transparent, rgba(0,0,0,0.8));
  color: var(--text-light);
  padding: 2rem;
}

.headline-card .card-title {
  font-size: 1.75rem;
  color: var(--text-light);
  margin-bottom: 0.75rem;
}

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

.headline-card .card-meta {
  color: rgba(255,255,255,0.8);
}

.sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--gap);
}

.widget {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
}

.widget-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--accent-color);
}

.widget-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.widget-item {
  display: flex;
  gap: 0.75rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-color);
}

.widget-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.widget-item-number {
  width: 28px;
  height: 28px;
  background: var(--accent-color);
  color: var(--text-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.875rem;
  font-weight: 700;
  flex-shrink: 0;
}

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

.widget-item-title {
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text-primary);
}

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

.widget-item-meta {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  margin-top: 0.25rem;
}

/* 特色内容区域 */
.features-section {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--gap);
  margin-bottom: var(--gap-lg);
}

.feature-large {
  height: 100%;
  min-height: 400px;
}

.feature-large .card-image {
  height: 60%;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--gap);
}

.feature-item {
  height: 190px;
}

.feature-item .card-image {
  height: 120px;
}

.feature-item .card-title {
  font-size: 0.9375rem;
}

/* 三栏推荐区域 */
.recommend-section {
  background: var(--bg-secondary);
  padding: var(--gap-lg) 0;
}

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

.recommend-column {
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
}

.recommend-column-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--accent-color);
}

.recommend-list {
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
}

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

.recommend-item::before {
  content: '•';
  color: var(--accent-color);
  font-weight: bold;
  flex-shrink: 0;
}

.recommend-item-title {
  font-size: 0.9375rem;
  line-height: 1.5;
  color: var(--text-primary);
}

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

/* ========================================
   分类页布局
   ======================================== */

.category-hero {
  padding: var(--gap-lg) 0;
}

.category-hero-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--gap);
  margin-bottom: var(--gap-lg);
}

.category-hero-card {
  position: relative;
  height: 350px;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.category-hero-card .card-image {
  height: 100%;
}

.category-hero-card .card-image img {
  height: 100%;
}

.category-hero-card .card-content {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(transparent, rgba(0,0,0,0.85));
  color: var(--text-light);
  padding: 2rem;
}

.category-hero-card .card-title {
  font-size: 1.5rem;
  color: var(--text-light);
}

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

.category-description {
  margin-top: 0.75rem;
  color: rgba(255,255,255,0.85);
  font-size: 0.9375rem;
}

/* 分类内容网格 */
.category-content {
  padding-bottom: var(--gap-lg);
}

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

.category-lead {
  grid-column: span 1;
  grid-row: span 2;
}

.category-lead .card-image {
  height: 250px;
}

.category-item {
  height: 100%;
}

.category-item .card-image {
  height: 140px;
}

.category-item .card-title {
  font-size: 0.9375rem;
}

/* ========================================
   文章详情页布局
   ======================================== */

.article-section {
  padding: var(--gap-lg) 0;
}

.article-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--gap-lg);
}

.article-main {
  background: var(--bg-primary);
}

.article-header {
  margin-bottom: 1.5rem;
}

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

.article-title {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.article-meta {
  display: flex;
  gap: 1.5rem;
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

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

.article-image {
  width: 100%;
  height: 400px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  margin-bottom: 1.5rem;
}

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

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

.article-content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 2rem 0 1rem;
  color: var(--text-primary);
}

.article-content h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 1.5rem 0 0.75rem;
  color: var(--text-primary);
}

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

.article-content ul li {
  list-style: disc;
  margin-bottom: 0.5rem;
}

.article-content ol li {
  list-style: decimal;
  margin-bottom: 0.5rem;
}

.article-content strong {
  color: var(--accent-dark);
}

.inline-media {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin: 1.5rem 0;
  border-left: 4px solid var(--accent-color);
}

.inline-media-title {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.inline-media-content {
  color: var(--text-secondary);
}

/* 侧边栏 */
.sidebar-widget {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  margin-bottom: var(--gap);
}

.author-card {
  text-align: center;
}

.author-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  margin: 0 auto 1rem;
  background: var(--accent-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: var(--text-light);
}

.author-name {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.author-role {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
}

.author-bio {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tag {
  display: inline-block;
  padding: 0.375rem 0.875rem;
  background: var(--bg-primary);
  border-radius: var(--radius);
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: all 0.3s ease;
}

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

/* ========================================
   404 页面
   ======================================== */

.error-section {
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--gap-lg) 0;
}

.error-content {
  text-align: center;
  max-width: 500px;
}

.error-code {
  font-size: 8rem;
  font-weight: 800;
  color: var(--accent-color);
  line-height: 1;
  margin-bottom: 1rem;
}

.error-title {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.error-message {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

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

.btn {
  display: inline-block;
  padding: 0.875rem 1.75rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius);
  transition: all 0.3s ease;
  cursor: pointer;
  border: none;
}

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

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

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

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

/* ========================================
   Footer 页脚
   ======================================== */

.footer {
  background: var(--bg-dark);
  color: var(--text-light);
  padding: 3rem 0 1.5rem;
}

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

.footer-brand {
  max-width: 300px;
}

.footer-logo {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.footer-desc {
  font-size: 0.9375rem;
  color: rgba(255,255,255,0.7);
  line-height: 1.7;
}

.footer-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--text-light);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.footer-link {
  font-size: 0.9375rem;
  color: rgba(255,255,255,0.7);
  transition: color 0.3s ease;
}

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

.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) {
  .hero-grid,
  .category-hero-grid,
  .article-grid {
    grid-template-columns: 1fr;
  }

  .features-section {
    grid-template-columns: 1fr;
  }

  .feature-large {
    min-height: 300px;
  }

  .category-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .category-lead {
    grid-column: span 2;
    grid-row: span 1;
  }

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

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

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

  .headline-card {
    height: 300px;
  }

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

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

  .feature-large .card-image {
    height: 200px;
  }

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

  .category-lead {
    grid-column: span 1;
  }

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

  .article-image {
    height: 250px;
  }

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

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

  .error-actions {
    flex-direction: column;
  }

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

  .footer-brand {
    max-width: 100%;
  }
}

@media (max-width: 480px) {
  :root {
    --gap: 15px;
    --gap-lg: 20px;
  }

  .logo {
    font-size: 1.25rem;
  }

  .logo-icon {
    width: 32px;
    height: 32px;
    font-size: 1rem;
  }

  .nav-link {
    font-size: 0.875rem;
  }

  .section-title {
    font-size: 1.125rem;
  }
}