/**
 * 拍立叙 - 共享样式表
 * 
 * © 2026 北京一拍即叙智能科技有限公司 版权所有
 * 
 * 设计规范:
 * - 品牌色: #E05A1B (主橙), #FF7A3D (亮橙), #FFF9F5 (暖白底), #FFF0E8 (浅橙)
 * - 频道色: 灵感发现#0A8C85, 自然时序#2D8B56, 文化星河#DC2626, 创作工坊#8B5CF6,
 *          时光档案#F59E0B, 智慧生活#0EA5E9, 社区互动#EC4899, AI工具箱#6366F1, 会员中心#E05A1B
 * - 字体: 思源宋体/Noto Serif SC (标题), 苹方/Noto Sans SC (正文)
 */

/* ===== CSS 变量定义 ===== */
:root {
  /* 品牌色 */
  --color-primary: #E05A1B;
  --color-primary-light: #FF7A3D;
  --color-primary-bg: #FFF9F5;
  --color-primary-bg-light: #FFF0E8;

  /* 文字色 */
  --color-text: #1C1408;
  --color-text-secondary: #6B5D4D;
  --color-text-muted: #9C8B7A;

  /* 频道色 */
  --color-channel-inspiration: #0A8C85;
  --color-channel-nature: #2D8B56;
  --color-channel-culture: #DC2626;
  --color-channel-creation: #8B5CF6;
  --color-channel-history: #F59E0B;
  --color-channel-life: #0EA5E9;
  --color-channel-community: #EC4899;
  --color-channel-ai: #6366F1;
  --color-channel-member: #E05A1B;

  /* 功能色 */
  --color-white: #ffffff;
  --color-border: rgba(224, 90, 27, 0.1);
  --color-shadow: rgba(224, 90, 27, 0.06);
  --color-shadow-strong: rgba(224, 90, 27, 0.12);

  /* 圆角 */
  --radius-sm: 12px;
  --radius-md: 20px;
  --radius-lg: 32px;

  /* 阴影 */
  --shadow-sm: 0 2px 8px rgba(224, 90, 27, 0.06);
  --shadow-md: 0 8px 24px rgba(224, 90, 27, 0.08);
  --shadow-lg: 0 24px 64px rgba(224, 90, 27, 0.12);

  /* 间距 */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;

  /* 导航高度 */
  --nav-height: 72px;
  --channel-bar-height: 56px;

  /* 字体 */
  --font-serif: 'Noto Serif SC', 'Source Han Serif SC', '思源宋体', serif;
  --font-sans: 'Noto Sans SC', 'PingFang SC', '苹方', -apple-system, BlinkMacSystemFont, sans-serif;
}

/* ===== 重置与基础样式 ===== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-primary-bg);
  color: var(--color-text);
  line-height: 1.6;
}

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

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

ul, ol {
  list-style: none;
}

/* ===== 布局类 ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.page-wrapper {
  min-height: 100vh;
  padding-top: calc(var(--nav-height) + var(--channel-bar-height));
}

.grid {
  display: grid;
  gap: var(--space-lg);
}

.flex {
  display: flex;
}

.two-col-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: var(--space-xl);
  align-items: start;
}

@media (max-width: 1024px) {
  .two-col-layout {
    grid-template-columns: 1fr;
  }
}

/* ===== 导航类 ===== */
.top-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: var(--color-white);
  box-shadow: var(--shadow-sm);
  z-index: 1000;
  display: flex;
  align-items: center;
}

.channel-bar {
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  height: var(--channel-bar-height);
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  z-index: 999;
  display: flex;
  align-items: center;
  overflow-x: auto;
}

.sidebar {
  position: sticky;
  top: calc(var(--nav-height) + var(--channel-bar-height) + var(--space-lg));
}

.main-content {
  flex: 1;
  min-width: 0;
}

/* ===== 卡片类 ===== */
.card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: box-shadow 0.3s ease, transform 0.3s ease;
}

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

.channel-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
  cursor: pointer;
}

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

.channel-card__icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-md);
  font-size: 24px;
}

.channel-card__title {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 600;
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}

.channel-card__desc {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

/* ===== 按钮类 ===== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 12px 24px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: var(--color-white);
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 500;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 12px rgba(224, 90, 27, 0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(224, 90, 27, 0.35);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 12px 24px;
  background: var(--color-white);
  color: var(--color-primary);
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 500;
  border: 2px solid var(--color-primary);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.3s ease;
}

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

.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 8px 16px;
  background: transparent;
  color: var(--color-text-secondary);
  font-family: var(--font-sans);
  font-size: 14px;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-ghost:hover {
  background: var(--color-primary-bg-light);
  color: var(--color-primary);
}

.action-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--color-white);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s ease;
}

.action-btn:hover {
  background: var(--color-primary-bg-light);
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.action-btn--active {
  background: var(--color-primary-bg-light);
  color: var(--color-primary);
}

/* ===== 标签类 ===== */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  background: var(--color-primary-bg-light);
  color: var(--color-primary);
  font-size: 12px;
  font-weight: 500;
  border-radius: 100px;
}

.channel-badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  color: var(--color-white);
  font-size: 12px;
  font-weight: 500;
  border-radius: 100px;
}

.channel-badge--inspiration { background: var(--color-channel-inspiration); }
.channel-badge--nature { background: var(--color-channel-nature); }
.channel-badge--culture { background: var(--color-channel-culture); }
.channel-badge--creation { background: var(--color-channel-creation); }
.channel-badge--history { background: var(--color-channel-history); }
.channel-badge--life { background: var(--color-channel-life); }
.channel-badge--community { background: var(--color-channel-community); }
.channel-badge--ai { background: var(--color-channel-ai); }
.channel-badge--member { background: var(--color-channel-member); }

.filter-tag {
  display: inline-flex;
  align-items: center;
  padding: 8px 16px;
  background: var(--color-white);
  color: var(--color-text-secondary);
  font-size: 14px;
  border: 1px solid var(--color-border);
  border-radius: 100px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.filter-tag:hover,
.filter-tag--active {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

/* ===== 排版类 ===== */
.page-title {
  font-family: var(--font-serif);
  font-size: 36px;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.3;
  margin-bottom: var(--space-lg);
}

.section-title {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-md);
}

.section-desc {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: var(--space-lg);
}

.article-content h2 {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 600;
  color: var(--color-text);
  margin: var(--space-xl) 0 var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 2px solid var(--color-primary-bg-light);
}

.article-content h3 {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 600;
  color: var(--color-text);
  margin: var(--space-lg) 0 var(--space-md);
}

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

.article-content blockquote {
  margin: var(--space-lg) 0;
  padding: var(--space-lg);
  background: var(--color-primary-bg);
  border-left: 4px solid var(--color-primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-style: italic;
  color: var(--color-text-secondary);
}

.article-content ul,
.article-content ol {
  margin: var(--space-md) 0;
  padding-left: var(--space-xl);
}

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

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

.article-content li {
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
}

.article-content a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

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

/* ===== 列表类 ===== */
.list-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: all 0.3s ease;
}

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

.list-item {
  display: flex;
  gap: var(--space-md);
  padding: var(--space-md);
  border-bottom: 1px solid var(--color-border);
  transition: background 0.2s ease;
}

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

.list-item:hover {
  background: var(--color-primary-bg);
}

.list-item__thumb {
  flex-shrink: 0;
  width: 120px;
  height: 80px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--color-primary-bg-light);
}

.list-item__content {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.list-item__title {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-xs);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.list-item__desc {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: var(--space-sm);
}

.list-item__meta {
  font-size: 12px;
  color: var(--color-text-muted);
}

/* ===== 分页类 ===== */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  margin-top: var(--space-xl);
}

.pagination__btn {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 var(--space-md);
  background: var(--color-white);
  color: var(--color-text-secondary);
  font-size: 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s ease;
}

.pagination__btn:hover:not(:disabled) {
  background: var(--color-primary-bg-light);
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.pagination__btn--active {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

.pagination__btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.pagination__ellipsis {
  color: var(--color-text-muted);
  padding: 0 var(--space-sm);
}

/* ===== 媒体类 ===== */
.cover-image {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius-md);
  background: var(--color-primary-bg-light);
}

.thumbnail {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.avatar {
  border-radius: 50%;
  object-fit: cover;
  background: var(--color-primary-bg-light);
}

.avatar--sm {
  width: 32px;
  height: 32px;
}

.avatar--md {
  width: 48px;
  height: 48px;
}

.avatar--lg {
  width: 64px;
  height: 64px;
}

.avatar--xl {
  width: 96px;
  height: 96px;
}

/* ===== 工具类 ===== */
.text-orange {
  color: var(--color-primary);
}

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

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

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--space-xs); }
.mt-2 { margin-top: var(--space-sm); }
.mt-3 { margin-top: var(--space-md); }
.mt-4 { margin-top: var(--space-lg); }
.mt-5 { margin-top: var(--space-xl); }
.mt-6 { margin-top: var(--space-2xl); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--space-xs); }
.mb-2 { margin-bottom: var(--space-sm); }
.mb-3 { margin-bottom: var(--space-md); }
.mb-4 { margin-bottom: var(--space-lg); }
.mb-5 { margin-bottom: var(--space-xl); }
.mb-6 { margin-bottom: var(--space-2xl); }

.pt-0 { padding-top: 0; }
.pt-1 { padding-top: var(--space-xs); }
.pt-2 { padding-top: var(--space-sm); }
.pt-3 { padding-top: var(--space-md); }
.pt-4 { padding-top: var(--space-lg); }
.pt-5 { padding-top: var(--space-xl); }

.pb-0 { padding-bottom: 0; }
.pb-1 { padding-bottom: var(--space-xs); }
.pb-2 { padding-bottom: var(--space-sm); }
.pb-3 { padding-bottom: var(--space-md); }
.pb-4 { padding-bottom: var(--space-lg); }
.pb-5 { padding-bottom: var(--space-xl); }

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.flex-start {
  display: flex;
  align-items: center;
  justify-content: flex-start;
}

.flex-end {
  display: flex;
  align-items: center;
  justify-content: flex-end;
}

.flex-wrap {
  flex-wrap: wrap;
}

.gap-1 { gap: var(--space-xs); }
.gap-2 { gap: var(--space-sm); }
.gap-3 { gap: var(--space-md); }
.gap-4 { gap: var(--space-lg); }
.gap-5 { gap: var(--space-xl); }

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-sm { font-size: 12px; }
.text-base { font-size: 14px; }
.text-md { font-size: 16px; }
.text-lg { font-size: 18px; }
.text-xl { font-size: 20px; }

.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

.hidden { display: none; }
.block { display: block; }
.inline { display: inline; }
.inline-block { display: inline-block; }

.w-full { width: 100%; }
.h-full { height: 100%; }

.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }

.cursor-pointer { cursor: pointer; }

/* ===== 响应式 ===== */
@media (max-width: 768px) {
  :root {
    --nav-height: 56px;
    --channel-bar-height: 48px;
  }

  .container {
    padding: 0 var(--space-md);
  }

  .page-title {
    font-size: 28px;
  }

  .section-title {
    font-size: 20px;
  }

  .two-col-layout {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .sidebar {
    position: static;
    top: 0;
  }

  .channel-bar {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

  .channel-bar::-webkit-scrollbar {
    display: none;
  }

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

  .list-item__thumb {
    width: 100%;
    height: 160px;
  }

  .pagination {
    flex-wrap: wrap;
  }

  .btn-primary,
  .btn-secondary {
    width: 100%;
  }

  .article-content h2 {
    font-size: 20px;
  }

  .article-content h3 {
    font-size: 18px;
  }

  .article-content p,
  .article-content li {
    font-size: 15px;
  }
}

@media (max-width: 480px) {
  .page-title {
    font-size: 24px;
  }

  .section-title {
    font-size: 18px;
  }

  .card {
    border-radius: var(--radius-sm);
  }

  .channel-card {
    padding: var(--space-md);
  }

  .avatar--lg {
    width: 48px;
    height: 48px;
  }

  .avatar--xl {
    width: 64px;
    height: 64px;
  }
}

/* ===== 动画 ===== */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

.animate-fade-in {
  animation: fadeIn 0.3s ease-out forwards;
}

.animate-pulse {
  animation: pulse 2s infinite;
}

/* ===== 滚动条美化 ===== */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: var(--color-primary-bg);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb {
  background: var(--color-primary-bg-light);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-primary);
}