/* ==========================================
   基础样式与变量
   ========================================== */
:root {
  --bg-color: #FDF8F3;
  --card-bg: #FFFEF9;
  --text-primary: #3D3229;
  --text-secondary: #6B5B4D;
  --accent-color: #8B7355;
  --border-color: #E8DFD5;
  --line-color: #F5C6C6;
}

[data-theme="dark"] {
  --bg-color: #2C2416;
  --card-bg: #3D3226;
  --text-primary: #F5EDE4;
  --text-secondary: #C9BBA8;
  --accent-color: #C4A77D;
  --border-color: #4A4035;
  --line-color: #8B6B6B;
}

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

body {
  font-family: "LXGW WenKai", "Noto Serif SC", Georgia, serif;
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.8;
  min-height: 100vh;
  transition: background-color 0.3s, color 0.3s;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 16px;
}

/* ==========================================
   页面切换
   ========================================== */
.page {
  display: none;
  min-height: 100vh;
}

.page.active {
  display: block;
}

/* ==========================================
   头部样式
   ========================================== */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
  border-bottom: 2px solid var(--border-color);
}

.logo {
  font-size: 1.4rem;
  font-weight: 600;
  font-style: italic;
  color: var(--text-primary);
}

.theme-toggle {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  padding: 8px;
  border-radius: 50%;
  transition: transform 0.3s;
}

.theme-toggle:hover {
  transform: rotate(20deg);
}

/* ==========================================
   网站状态
   ========================================== */
.site-status {
  text-align: center;
  padding: 16px 0;
  border-bottom: 2px double var(--border-color);
  color: var(--text-secondary);
  font-style: italic;
}

.status-text .days {
  color: var(--accent-color);
  font-weight: 600;
}

/* ==========================================
   公告样式
   ========================================== */
.announcement {
  margin: 24px 0;
  padding: 20px;
  background: var(--card-bg);
  border: 1px dashed var(--accent-color);
  border-radius: 8px;
  position: relative;
}

.announcement::before {
  content: "📌";
  position: absolute;
  top: -12px;
  left: 16px;
  font-size: 1.2rem;
}

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

.announcement-content {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.announcement-image {
  max-width: 100%;
  border-radius: 4px;
  margin-top: 12px;
}

.announcement-link {
  display: inline-block;
  margin-top: 12px;
  color: var(--accent-color);
  text-decoration: none;
}

.announcement-link:hover {
  text-decoration: underline;
}

.announcement-date {
  display: block;
  margin-top: 12px;
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-style: italic;
}


/* ==========================================
   文章列表样式
   ========================================== */
.posts {
  margin: 32px 0;
}

.section-title {
  font-size: 1.2rem;
  font-weight: 600;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 16px;
}

.post-item {
  display: flex;
  padding: 16px 0;
  border-bottom: 1px dotted var(--border-color);
  cursor: pointer;
  transition: background 0.2s;
}

.post-item:hover {
  background: var(--card-bg);
  margin: 0 -16px;
  padding: 16px;
  border-radius: 8px;
}

.post-index {
  color: var(--accent-color);
  font-weight: 600;
  min-width: 36px;
}

.post-info {
  flex: 1;
  min-width: 0;
}

.post-title {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 6px;
}

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

.post-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 8px;
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-style: italic;
}

.post-meta .has-images {
  color: var(--accent-color);
}

/* 分享按钮 */
.share-btn {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 6px 12px;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  cursor: pointer;
  font-size: 0.8rem;
  color: var(--text-secondary);
  transition: all 0.2s;
  white-space: nowrap;
}

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

.share-btn svg {
  width: 14px;
  height: 14px;
}

/* ==========================================
   详情页样式
   ========================================== */
.detail-header {
  position: sticky;
  top: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  background: var(--bg-color);
  border-bottom: 1px solid var(--border-color);
  z-index: 100;
}

.back-btn {
  background: none;
  border: none;
  font-size: 1rem;
  color: var(--accent-color);
  cursor: pointer;
  padding: 8px 0;
}

.detail-content {
  padding: 24px 0;
}

.detail-title {
  font-size: 1.6rem;
  font-weight: 600;
  margin-bottom: 12px;
  line-height: 1.4;
}

.detail-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding-bottom: 20px;
  border-bottom: 1px dashed var(--border-color);
  margin-bottom: 24px;
}

.detail-date {
  color: var(--text-secondary);
  font-style: italic;
  font-size: 0.9rem;
}

.detail-text {
  font-size: 1.05rem;
  line-height: 2;
  white-space: pre-wrap;
  margin-bottom: 24px;
}

/* 图片网格 */
.detail-images {
  display: grid;
  gap: 8px;
  margin-bottom: 24px;
}

.detail-images.single {
  grid-template-columns: 1fr;
}

.detail-images.double {
  grid-template-columns: 1fr 1fr;
}

.detail-images.multiple {
  grid-template-columns: repeat(3, 1fr);
}

.detail-image-item {
  position: relative;
  aspect-ratio: 1;
  overflow: hidden;
  border-radius: 8px;
  cursor: pointer;
}

.detail-images.single .detail-image-item {
  aspect-ratio: 16/10;
}

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

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

.detail-image-item .more-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.5rem;
  font-weight: 600;
}

.detail-link {
  display: inline-block;
  padding: 12px 24px;
  background: var(--accent-color);
  color: white;
  text-decoration: none;
  border-radius: 8px;
  margin-bottom: 24px;
}

.detail-footer {
  padding-top: 24px;
  border-top: 2px double var(--border-color);
  text-align: center;
  color: var(--text-secondary);
  font-style: italic;
}

/* ==========================================
   图片查看器
   ========================================== */
.image-viewer {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.95);
  z-index: 2000;
  flex-direction: column;
}

.image-viewer.active {
  display: flex;
}

.viewer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px;
  color: white;
}

.viewer-counter {
  font-size: 0.9rem;
  opacity: 0.8;
}

.viewer-close {
  background: none;
  border: none;
  color: white;
  font-size: 1.5rem;
  cursor: pointer;
  padding: 8px;
  opacity: 0.8;
  transition: opacity 0.2s;
}

.viewer-close:hover {
  opacity: 1;
}

.viewer-body {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.viewer-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(255,255,255,0.1);
  border: none;
  color: white;
  font-size: 3rem;
  padding: 20px 16px;
  cursor: pointer;
  transition: background 0.2s;
  z-index: 10;
}

.viewer-nav:hover {
  background: rgba(255,255,255,0.2);
}

.viewer-nav.prev {
  left: 0;
  border-radius: 0 8px 8px 0;
}

.viewer-nav.next {
  right: 0;
  border-radius: 8px 0 0 8px;
}

.viewer-image-wrap {
  max-width: 90%;
  max-height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.viewer-image-wrap img {
  max-width: 100%;
  max-height: 80vh;
  object-fit: contain;
  transition: transform 0.3s;
  cursor: zoom-in;
}

.viewer-image-wrap img.zoomed {
  cursor: zoom-out;
  transform: scale(2);
}

.viewer-thumbnails {
  display: flex;
  justify-content: center;
  gap: 8px;
  padding: 16px;
  overflow-x: auto;
}

.viewer-thumb {
  width: 60px;
  height: 60px;
  border-radius: 4px;
  overflow: hidden;
  cursor: pointer;
  opacity: 0.5;
  transition: opacity 0.2s;
  flex-shrink: 0;
  border: 2px solid transparent;
}

.viewer-thumb.active {
  opacity: 1;
  border-color: white;
}

.viewer-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ==========================================
   页脚样式
   ========================================== */
.footer {
  text-align: center;
  padding: 32px 0;
  color: var(--text-secondary);
  font-size: 0.85rem;
  border-top: 1px solid var(--border-color);
}

/* ==========================================
   Toast 提示
   ========================================== */
.toast {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--text-primary);
  color: var(--bg-color);
  padding: 12px 24px;
  border-radius: 8px;
  font-size: 0.9rem;
  opacity: 0;
  transition: all 0.3s;
  z-index: 3000;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ==========================================
   响应式
   ========================================== */
@media (max-width: 480px) {
  .detail-images.multiple {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .viewer-nav {
    font-size: 2rem;
    padding: 16px 12px;
  }
}