/* 广告创意屋 - 样式表
 * 关键词: 广告创意屋 www.kdjxbt.cn 创意策划 文案撰写 视觉设计
 */

/* ===== CSS 变量 ===== */
:root {
  --accent-color: #9c27b0;
  --accent-light: #ba68c8;
  --accent-dark: #7b1fa2;
  --text-primary: #333;
  --text-secondary: #666;
  --text-muted: #999;
  --bg-primary: #fff;
  --bg-secondary: #f8f9fa;
  --bg-dark: #2d2d2d;
  --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: 8px;
  --radius-lg: 12px;
  --max-width: 1200px;
  --header-height: 64px;
}

/* ===== 基础重置 ===== */
*, *::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: var(--bg-primary);
}

a {
  color: var(--accent-color);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: var(--accent-dark);
}

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

ul, ol {
  list-style: none;
}

/* ===== 布局容器 ===== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* ===== 页头 ===== */
.header {
  height: var(--header-height);
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
}

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

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

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

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

.nav a {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
}

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

.search-btn {
  width: 40px;
  height: 40px;
  border: none;
  background: var(--bg-secondary);
  border-radius: var(--radius);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
}

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

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

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 16px;
  font-weight: 700;
}

.hero p {
  font-size: 1.2rem;
  opacity: 0.9;
  max-width: 600px;
  margin: 0 auto 32px;
}

.hero-tags {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.tag {
  padding: 8px 20px;
  background: rgba(255,255,255,0.2);
  border-radius: 20px;
  font-size: 0.9rem;
  backdrop-filter: blur(4px);
}

/* ===== 区块标题 ===== */
.section-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.section-title::before {
  content: '';
  width: 4px;
  height: 24px;
  background: var(--accent-color);
  border-radius: 2px;
}

/* ===== 作者卡片网格 ===== */
.authors-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  padding: 48px 0;
}

.author-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  text-align: center;
  transition: box-shadow 0.3s, transform 0.3s;
}

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

.author-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  margin: 0 auto 16px;
  background: linear-gradient(135deg, var(--accent-light), var(--accent-color));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.8rem;
  font-weight: 600;
}

.author-name {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.author-role {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.author-stats {
  display: flex;
  justify-content: center;
  gap: 24px;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.author-stats span {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.author-stats strong {
  color: var(--accent-color);
  font-size: 1.1rem;
}

/* ===== 内容列表 ===== */
.content-section {
  background: var(--bg-secondary);
  padding: 48px 0;
}

.content-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.content-item {
  background: var(--bg-primary);
  border-radius: var(--radius);
  padding: 20px 24px;
  display: flex;
  gap: 20px;
  align-items: center;
  border: 1px solid var(--border-color);
  transition: box-shadow 0.2s;
}

.content-item:hover {
  box-shadow: var(--shadow);
}

.content-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--accent-light), var(--accent-color));
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.content-info {
  flex: 1;
}

.content-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text-primary);
}

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

.content-arrow {
  color: var(--text-muted);
  font-size: 1.2rem;
}

/* ===== 三栏推荐区 ===== */
.recommend-section {
  padding: 48px 0;
}

.recommend-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.recommend-column h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--accent-color);
}

.recommend-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.recommend-list li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.recommend-list .num {
  width: 24px;
  height: 24px;
  background: var(--bg-secondary);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  flex-shrink: 0;
}

.recommend-list li:first-child .num {
  background: var(--accent-color);
  color: #fff;
}

.recommend-list a {
  color: var(--text-primary);
  font-size: 0.95rem;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.recommend-list a:hover {
  color: var(--accent-color);
}

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

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

.footer-brand .logo {
  margin-bottom: 16px;
  display: inline-block;
}

.footer-brand p {
  color: #aaa;
  font-size: 0.9rem;
  line-height: 1.7;
}

.footer-column h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.footer-column ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-column a {
  color: #aaa;
  font-size: 0.9rem;
}

.footer-column a:hover {
  color: #fff;
}

.footer-bottom {
  border-top: 1px solid #444;
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: #888;
}

/* ===== 面包屑 ===== */
.breadcrumb {
  background: var(--bg-secondary);
  padding: 16px 0;
  font-size: 0.9rem;
}

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

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

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

.breadcrumb .current {
  color: var(--text-primary);
}

/* ===== 分类页作者头部 ===== */
.author-header {
  padding: 48px 0;
  text-align: center;
  background: var(--bg-secondary);
}

.author-header .author-avatar {
  width: 120px;
  height: 120px;
  font-size: 2.5rem;
  margin-bottom: 20px;
}

.author-header h1 {
  font-size: 1.8rem;
  margin-bottom: 12px;
}

.author-header .bio {
  color: var(--text-secondary);
  max-width: 500px;
  margin: 0 auto 20px;
}

.social-links {
  display: flex;
  justify-content: center;
  gap: 16px;
}

.social-links a {
  width: 40px;
  height: 40px;
  border: 1px solid var(--border-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all 0.2s;
}

.social-links a:hover {
  background: var(--accent-color);
  border-color: var(--accent-color);
  color: #fff;
}

/* ===== 文章网格 ===== */
.posts-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  padding: 32px 0;
}

.post-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: box-shadow 0.3s;
}

.post-card:hover {
  box-shadow: var(--shadow-hover);
}

.post-image {
  height: 180px;
  background: linear-gradient(135deg, var(--accent-light), var(--accent-dark));
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.5);
  font-size: 3rem;
}

.post-content {
  padding: 20px;
}

.post-category {
  font-size: 0.8rem;
  color: var(--accent-color);
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.post-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 12px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-excerpt {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 16px;
}

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

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

.pagination a,
.pagination span {
  min-width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
  font-size: 0.9rem;
  transition: all 0.2s;
}

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

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

.pagination .current {
  background: var(--accent-color);
  color: #fff;
}

.pagination .prev,
.pagination .next {
  padding: 0 16px;
}

/* ===== 文章详情页 ===== */
.article-header {
  padding: 48px 0 32px;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.article-header h1 {
  font-size: 2rem;
  line-height: 1.4;
  margin-bottom: 20px;
}

.article-meta {
  display: flex;
  justify-content: center;
  gap: 24px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.article-meta span {
  display: flex;
  align-items: center;
  gap: 6px;
}

.article-featured-image {
  max-width: 900px;
  margin: 0 auto 48px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  height: 400px;
  background: linear-gradient(135deg, var(--accent-light), var(--accent-dark));
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.5);
  font-size: 4rem;
}

.article-content {
  max-width: 800px;
  margin: 0 auto;
  padding-bottom: 48px;
}

.article-content h2 {
  font-size: 1.5rem;
  margin: 32px 0 16px;
  font-weight: 600;
}

.article-content h3 {
  font-size: 1.25rem;
  margin: 24px 0 12px;
  font-weight: 600;
}

.article-content p {
  margin-bottom: 16px;
  line-height: 1.8;
  color: var(--text-secondary);
}

.article-content ul,
.article-content ol {
  margin-bottom: 16px;
  padding-left: 24px;
}

.article-content ul li {
  list-style: disc;
  margin-bottom: 8px;
  color: var(--text-secondary);
}

.article-content blockquote {
  border-left: 4px solid var(--accent-color);
  padding-left: 20px;
  margin: 24px 0;
  font-style: italic;
  color: var(--text-secondary);
}

/* ===== 更多文章 ===== */
.more-section {
  background: var(--bg-secondary);
  padding: 48px 0;
}

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

.more-card {
  background: var(--bg-primary);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border-color);
  transition: box-shadow 0.2s;
}

.more-card:hover {
  box-shadow: var(--shadow);
}

.more-card .post-image {
  height: 140px;
}

.more-card .post-content {
  padding: 16px;
}

.more-card .post-title {
  font-size: 1rem;
  margin-bottom: 8px;
}

/* ===== 404页面 ===== */
.error-page {
  min-height: calc(100vh - var(--header-height) - 300px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 80px 20px;
}

.error-code {
  font-size: 8rem;
  font-weight: 700;
  color: var(--accent-color);
  line-height: 1;
  margin-bottom: 16px;
  opacity: 0.8;
}

.error-title {
  font-size: 1.5rem;
  margin-bottom: 12px;
}

.error-desc {
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  background: var(--accent-color);
  color: #fff;
  border-radius: var(--radius);
  font-weight: 500;
  transition: background 0.2s;
}

.btn:hover {
  background: var(--accent-dark);
  color: #fff;
}

/* ===== 响应式设计 ===== */
@media (max-width: 1024px) {
  .authors-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

@media (max-width: 768px) {
  .nav {
    display: none;
  }

  .hero {
    padding: 60px 0;
  }

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

  .hero p {
    font-size: 1rem;
  }

  .authors-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .author-card {
    display: flex;
    text-align: left;
    gap: 16px;
    align-items: center;
  }

  .author-card .author-avatar {
    margin: 0;
    flex-shrink: 0;
  }

  .author-card .author-info {
    flex: 1;
  }

  .content-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

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

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

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

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

  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }

  .article-header h1 {
    font-size: 1.5rem;
  }

  .article-featured-image {
    height: 240px;
    margin-bottom: 32px;
  }

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

@media (max-width: 480px) {
  .hero-tags {
    gap: 8px;
  }

  .tag {
    padding: 6px 14px;
    font-size: 0.8rem;
  }

  .author-stats {
    gap: 16px;
  }

  .pagination a,
  .pagination span {
    min-width: 36px;
    height: 36px;
    font-size: 0.85rem;
  }
}