/* 围巾DIY社区 - 基础样式 */
:root {
  --primary: #e67e22;
  --primary-dark: #d35400;
  --secondary: #2c3e50;
  --accent: #27ae60;
  --bg: #f8f9fa;
  --card-bg: #fff;
  --text: #333;
  --text-light: #666;
  --border: #e0e0e0;
  --shadow: 0 2px 8px rgba(0,0,0,0.1);
  --radius: 8px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

a {
  text-decoration: none;
  color: inherit;
}

ul {
  list-style: none;
}

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

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

/* 头部 */
.header {
  background: var(--card-bg);
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
}

.logo span {
  color: var(--secondary);
}

.nav {
  display: flex;
  gap: 32px;
}

.nav a {
  font-size: 0.95rem;
  color: var(--text);
  transition: color 0.2s;
}

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

.search-box {
  display: flex;
  align-items: center;
  background: var(--bg);
  border-radius: var(--radius);
  padding: 8px 16px;
  width: 280px;
}

.search-box input {
  border: none;
  background: none;
  outline: none;
  flex: 1;
  font-size: 0.9rem;
}

.search-box button {
  border: none;
  background: none;
  cursor: pointer;
  color: var(--text-light);
}

/* Hero区域 */
.hero {
  background: linear-gradient(135deg, var(--secondary) 0%, var(--primary-dark) 100%);
  color: #fff;
  padding: 80px 0;
  text-align: center;
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 16px;
}

.hero p {
  font-size: 1.1rem;
  opacity: 0.9;
  margin-bottom: 32px;
}

.hero-search {
  max-width: 600px;
  margin: 0 auto;
  display: flex;
  gap: 12px;
  background: #fff;
  padding: 8px;
  border-radius: var(--radius);
}

.hero-search input {
  flex: 1;
  border: none;
  padding: 12px 16px;
  font-size: 1rem;
  outline: none;
}

.hero-search button {
  background: var(--primary);
  color: #fff;
  border: none;
  padding: 12px 32px;
  border-radius: var(--radius);
  font-size: 1rem;
  cursor: pointer;
  transition: background 0.2s;
}

.hero-search button:hover {
  background: var(--primary-dark);
}

/* 分类区域 */
.categories {
  padding: 48px 0;
}

.section-title {
  font-size: 1.5rem;
  margin-bottom: 24px;
  color: var(--secondary);
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 16px;
}

.category-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: transform 0.2s, box-shadow 0.2s;
}

.category-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 4px 16px rgba(0,0,0,0.15);
}

.category-card .icon {
  font-size: 2rem;
  margin-bottom: 12px;
}

.category-card h3 {
  font-size: 1rem;
  color: var(--text);
}

.category-card span {
  font-size: 0.85rem;
  color: var(--text-light);
}

/* 教程卡片 */
.tutorials {
  padding: 48px 0;
  background: #fff;
}

.tutorial-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

.tutorial-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform 0.2s;
}

.tutorial-card:hover {
  transform: translateY(-4px);
}

.tutorial-card .thumb {
  height: 180px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
}

.tutorial-card .content {
  padding: 20px;
}

.tutorial-card .tag {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  font-size: 0.75rem;
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 12px;
}

.tutorial-card h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
  color: var(--secondary);
}

.tutorial-card p {
  font-size: 0.9rem;
  color: var(--text-light);
  margin-bottom: 16px;
}

.tutorial-card .meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-light);
}

/* 文章列表 */
.articles {
  padding: 48px 0;
}

.article-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.article-list {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}

.article-list h4 {
  font-size: 1rem;
  color: var(--secondary);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--primary);
}

.article-list li {
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}

.article-list li:last-child {
  border-bottom: none;
}

.article-list a {
  font-size: 0.95rem;
  color: var(--text);
  display: block;
  transition: color 0.2s;
}

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

/* 面包屑 */
.breadcrumb {
  background: var(--card-bg);
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
}

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

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

.breadcrumb span {
  margin: 0 8px;
  color: var(--text-light);
}

/* 分类页头部 */
.category-header {
  background: var(--card-bg);
  padding: 48px 0;
  text-align: center;
}

.category-header h1 {
  font-size: 2rem;
  color: var(--secondary);
  margin-bottom: 8px;
}

.category-header p {
  color: var(--text-light);
}

/* 筛选器 */
.filters {
  background: var(--bg);
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
}

.filter-group {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
}

.filter-group span {
  font-size: 0.9rem;
  color: var(--text-light);
}

.filter-btn {
  padding: 8px 16px;
  border: 1px solid var(--border);
  background: var(--card-bg);
  border-radius: var(--radius);
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.2s;
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

/* 教程列表 */
.tutorial-list {
  padding: 32px 0;
}

.tutorial-item {
  display: flex;
  gap: 24px;
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 16px;
  box-shadow: var(--shadow);
  transition: transform 0.2s;
}

.tutorial-item:hover {
  transform: translateX(4px);
}

.tutorial-item .thumb {
  width: 200px;
  height: 140px;
  background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  flex-shrink: 0;
}

.tutorial-item .info {
  flex: 1;
}

.tutorial-item .info h3 {
  font-size: 1.2rem;
  color: var(--secondary);
  margin-bottom: 8px;
}

.tutorial-item .info p {
  font-size: 0.95rem;
  color: var(--text-light);
  margin-bottom: 12px;
}

.tutorial-item .meta {
  display: flex;
  gap: 16px;
  font-size: 0.85rem;
  color: var(--text-light);
}

.tutorial-item .meta span {
  display: flex;
  align-items: center;
  gap: 4px;
}

.tutorial-item .action {
  display: flex;
  align-items: center;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  padding: 12px 24px;
  border-radius: var(--radius);
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  transition: background 0.2s;
}

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

/* 分页 */
.pagination {
  display: flex;
  justify-content: center;
  gap: 8px;
  padding: 32px 0;
}

.pagination a,
.pagination span {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius);
  font-size: 0.95rem;
  transition: all 0.2s;
}

.pagination a {
  background: var(--card-bg);
  color: var(--text);
}

.pagination a:hover {
  background: var(--primary);
  color: #fff;
}

.pagination span {
  background: var(--primary);
  color: #fff;
}

/* 文章页 */
.article-header {
  background: var(--card-bg);
  padding: 48px 0;
}

.article-header h1 {
  font-size: 2rem;
  color: var(--secondary);
  margin-bottom: 16px;
}

.article-meta {
  display: flex;
  gap: 24px;
  color: var(--text-light);
  font-size: 0.95rem;
}

.article-content {
  padding: 48px 0;
}

.article-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 48px;
}

.article-main {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow);
}

.article-main .featured-img {
  width: 100%;
  height: 300px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  margin-bottom: 32px;
}

.article-main h2 {
  font-size: 1.5rem;
  color: var(--secondary);
  margin: 32px 0 16px;
}

.article-main h3 {
  font-size: 1.2rem;
  color: var(--secondary);
  margin: 24px 0 12px;
}

.article-main p {
  font-size: 1rem;
  color: var(--text);
  margin-bottom: 16px;
  line-height: 1.8;
}

.article-main ul {
  margin: 16px 0;
  padding-left: 24px;
  list-style: disc;
}

.article-main li {
  margin-bottom: 8px;
  color: var(--text);
}

.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sidebar-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}

.sidebar-card h4 {
  font-size: 1rem;
  color: var(--secondary);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--primary);
}

.sidebar-card li {
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}

.sidebar-card li:last-child {
  border-bottom: none;
}

.sidebar-card a {
  font-size: 0.9rem;
  color: var(--text);
}

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

/* 404页面 */
.error-page {
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 48px 0;
}

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

.error-code {
  font-size: 8rem;
  font-weight: 700;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 16px;
}

.error-content h1 {
  font-size: 1.8rem;
  color: var(--secondary);
  margin-bottom: 16px;
}

.error-content p {
  color: var(--text-light);
  margin-bottom: 32px;
}

/* 页脚 */
.footer {
  background: var(--secondary);
  color: #fff;
  padding: 48px 0 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 32px;
}

.footer-brand h3 {
  font-size: 1.3rem;
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 0.9rem;
  opacity: 0.8;
  line-height: 1.8;
}

.footer-links h4 {
  font-size: 1rem;
  margin-bottom: 16px;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  font-size: 0.9rem;
  opacity: 0.8;
  transition: opacity 0.2s;
}

.footer-links a:hover {
  opacity: 1;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 24px;
  text-align: center;
  font-size: 0.85rem;
  opacity: 0.7;
}

/* 响应式 */
@media (max-width: 1024px) {
  .article-layout {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 768px) {
  .header .container {
    flex-wrap: wrap;
    height: auto;
    padding: 12px 20px;
  }

  .nav {
    order: 3;
    width: 100%;
    gap: 20px;
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--border);
  }

  .search-box {
    width: auto;
    flex: 1;
    margin-left: 16px;
  }

  .hero {
    padding: 48px 0;
  }

  .hero h1 {
    font-size: 1.8rem;
  }

  .hero-search {
    flex-direction: column;
    margin: 0 20px;
  }

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

  .tutorial-item {
    flex-direction: column;
  }

  .tutorial-item .thumb {
    width: 100%;
    height: 180px;
  }

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

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

@media (max-width: 480px) {
  .category-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .filter-group {
    gap: 8px;
  }

  .filter-btn {
    padding: 6px 12px;
    font-size: 0.85rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

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