/* 夜景摄影 - 样式表 */
/* 案例展示风格 (portfolio-case) */

/* CSS 变量 */
:root {
  --accent-color: #00bcd4;
  --accent-dark: #0097a7;
  --bg-dark: #0a0a0f;
  --bg-card: #12121a;
  --bg-panel: #1a1a25;
  --text-primary: #ffffff;
  --text-secondary: #a0a0b0;
  --text-muted: #6a6a7a;
  --border-color: #2a2a3a;
  --gradient-primary: linear-gradient(135deg, #00bcd4 0%, #006064 100%);
  --shadow-glow: 0 0 30px rgba(0, 188, 212, 0.3);
  --transition: all 0.3s ease;
}

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

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

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

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

ul {
  list-style: none;
}

/* 页头 */
.header {
  background: rgba(10, 10, 15, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo::before {
  content: '📷';
  font-size: 1.25rem;
}

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

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

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

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

.nav a.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-primary);
}

/* 分屏布局 */
.split-screen {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: calc(100vh - 200px);
  max-width: 1200px;
  margin: 0 auto;
}

.split-panel {
  padding: 4rem 3rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.split-panel.left {
  background: var(--bg-panel);
  border-right: 1px solid var(--border-color);
}

.split-panel.right {
  background: var(--bg-card);
}

.panel-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--accent-color);
  margin-bottom: 1rem;
}

.panel-title {
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, #fff 0%, var(--accent-color) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.panel-desc {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  line-height: 1.8;
}

.panel-features {
  margin-bottom: 2rem;
}

.panel-features li {
  padding: 0.5rem 0;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.panel-features li::before {
  content: '✓';
  color: var(--accent-color);
  font-weight: 700;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 1rem 2rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  transition: var(--transition);
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 40px rgba(0, 188, 212, 0.5);
  color: white;
}

.btn-secondary {
  background: transparent;
  color: var(--accent-color);
  border: 2px solid var(--accent-color);
}

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

/* 三栏内容区 */
.content-section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 4rem 2rem;
}

.section-title {
  font-size: 1.75rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 3rem;
  position: relative;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -1rem;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: var(--gradient-primary);
}

.three-columns {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.column {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 2rem;
  transition: var(--transition);
}

.column:hover {
  border-color: var(--accent-color);
  transform: translateY(-4px);
}

.column-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.column-icon {
  width: 40px;
  height: 40px;
  background: var(--gradient-primary);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

.column-title {
  font-size: 1.1rem;
  font-weight: 600;
}

.article-list li {
  padding: 0.875rem 0;
  border-bottom: 1px solid var(--border-color);
}

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

.article-list a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.article-list a::before {
  content: '•';
  color: var(--accent-color);
}

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

/* 面包屑 */
.breadcrumb {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.5rem 2rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

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

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

.breadcrumb-separator {
  color: var(--text-muted);
}

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

/* 分类页布局 */
.category-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

.category-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 2.5rem;
  transition: var(--transition);
}

.category-card:hover {
  border-color: var(--accent-color);
  box-shadow: var(--shadow-glow);
}

.category-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.category-icon {
  width: 56px;
  height: 56px;
  background: var(--gradient-primary);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
}

.category-title {
  font-size: 1.5rem;
  font-weight: 700;
}

.category-desc {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  font-size: 0.95rem;
}

.category-items {
  margin-bottom: 1.5rem;
}

.category-items li {
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.category-items li:last-child {
  border-bottom: none;
}

.category-items a {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

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

.item-count {
  font-size: 0.8rem;
  color: var(--text-muted);
  background: var(--bg-panel);
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
}

/* 文章页布局 */
.article-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

.article-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  overflow: hidden;
}

.article-main {
  padding: 3rem;
}

.article-meta {
  display: flex;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
  font-size: 0.875rem;
  color: var(--text-muted);
}

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

.article-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  line-height: 1.3;
}

.article-content {
  color: var(--text-secondary);
  line-height: 1.9;
}

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

.article-content h3 {
  color: var(--text-primary);
  font-size: 1.25rem;
  margin: 2rem 0 1rem;
}

.article-sidebar {
  background: var(--bg-panel);
  padding: 3rem;
  border-left: 1px solid var(--border-color);
}

.sidebar-section {
  margin-bottom: 2.5rem;
}

.sidebar-section:last-child {
  margin-bottom: 0;
}

.sidebar-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--accent-color);
  display: inline-block;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.tag {
  background: var(--bg-dark);
  color: var(--text-secondary);
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-size: 0.875rem;
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

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

/* 推荐文章横向 */
.related-section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 3rem 2rem;
  border-top: 1px solid var(--border-color);
}

.related-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  text-align: center;
}

.related-list {
  display: flex;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
}

.related-list a {
  color: var(--text-secondary);
  padding: 0.75rem 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  transition: var(--transition);
}

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

/* 404页面 */
.error-page {
  min-height: calc(100vh - 200px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 4rem 2rem;
}

.error-code {
  font-size: 8rem;
  font-weight: 900;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 1rem;
  text-shadow: var(--shadow-glow);
}

.error-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.error-desc {
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin-bottom: 2.5rem;
  max-width: 500px;
}

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

/* 页脚 */
.footer {
  background: var(--bg-card);
  border-top: 1px solid var(--border-color);
  padding: 3rem 2rem 2rem;
  margin-top: 4rem;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

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

.footer-logo {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

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

.footer-desc {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.7;
}

.footer-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
  color: var(--text-primary);
}

.footer-links li {
  margin-bottom: 0.75rem;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

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

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.copyright {
  color: var(--text-muted);
  font-size: 0.875rem;
}

.footer-social {
  display: flex;
  gap: 1rem;
}

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

.footer-social a:hover {
  background: var(--accent-color);
  color: white;
  border-color: var(--accent-color);
}

/* 响应式设计 */
@media (max-width: 1024px) {
  .split-screen {
    grid-template-columns: 1fr;
  }

  .split-panel.left {
    border-right: none;
    border-bottom: 1px solid var(--border-color);
  }

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

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

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

  .article-sidebar {
    border-left: none;
    border-top: 1px solid var(--border-color);
  }

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

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

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

  .split-panel {
    padding: 2rem 1.5rem;
  }

  .panel-title {
    font-size: 1.75rem;
  }

  .content-section {
    padding: 2rem 1rem;
  }

  .category-grid,
  .article-container {
    padding: 1rem;
  }

  .category-card,
  .article-main,
  .article-sidebar {
    padding: 1.5rem;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

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

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

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

@media (max-width: 480px) {
  .panel-title {
    font-size: 1.5rem;
  }

  .section-title {
    font-size: 1.4rem;
  }

  .btn {
    padding: 0.875rem 1.5rem;
    font-size: 0.9rem;
  }

  .error-actions {
    flex-direction: column;
    width: 100%;
    padding: 0 2rem;
  }

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