/* ========== 朋友圈风格时间线 ========== */
:root{
  --bg:#ededed;
  --card:#ffffff;
  --text:#1a1a1a;
  --muted:#888888;
  --link:#576b95;
  --border:#e5e5e5;
  --divider:#f0f0f0;
  --shadow:0 1px 2px rgba(0,0,0,0.04);
}
body.dark-theme{
  --bg:#111111;
  --card:#1c1c1e;
  --text:#e7e7e7;
  --muted:#8a8a8a;
  --link:#7aa6e5;
  --border:#2a2a2c;
  --divider:#242426;
  --shadow:0 1px 2px rgba(0,0,0,0.35);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:var(--bg);
  color:var(--text);
  font:15px/1.6 -apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",Helvetica,Arial,sans-serif;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--link);text-decoration:none}
a:hover{opacity:.85}
img{display:block;max-width:100%}

/* ===== 顶部封面 ===== */
.cover{
  position:relative;
  height:260px;
  background:#667 center/cover no-repeat;
  display:flex;
  align-items:flex-end;
  justify-content:flex-end;
  padding:18px 20px;
  color:#fff;
}
.cover::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(0,0,0,0) 40%,rgba(0,0,0,0.25));
  pointer-events:none;
}
.cover-info{
  position:relative;z-index:1;
  display:flex;align-items:center;gap:12px;
  text-shadow:0 1px 3px rgba(0,0,0,0.5);
}
.cover-info .name{font-size:18px;font-weight:600;letter-spacing:.5px}
.cover-info .sub{font-size:12px;opacity:.85;margin-top:2px}
.cover-avatar{
  width:64px;height:64px;border-radius:8px;
  border:2px solid rgba(255,255,255,0.5);
  background:#fff center/cover no-repeat;
  box-shadow:0 2px 8px rgba(0,0,0,0.3);
}

/* ===== 搜索条 ===== */
.search-banner{
  max-width:640px;margin:12px auto 0;padding:10px 16px;
  background:var(--card);border-radius:8px;
  color:var(--muted);font-size:13px;
  display:flex;justify-content:space-between;align-items:center;
  box-shadow:var(--shadow);
}
.search-form{
  max-width:640px;margin:12px auto 0;padding:8px 12px;
  background:var(--card);border-radius:8px;
  display:flex;gap:8px;box-shadow:var(--shadow);
}
.search-form input{
  flex:1;border:none;outline:none;background:transparent;
  color:var(--text);font-size:14px;padding:6px 4px;
}
.search-form button{
  border:none;background:var(--link);color:#fff;
  padding:6px 14px;border-radius:4px;cursor:pointer;font-size:13px;
}

/* ===== 时间线容器 ===== */
.timeline{
  max-width:640px;margin:0 auto;padding:0 0 80px;
  background:var(--card);
}
@media(min-width:768px){
  .timeline{margin-top:-40px;position:relative;z-index:2;border-radius:10px 10px 0 0;box-shadow:var(--shadow)}
}

/* ===== 单条动态 ===== */
.moment{
  display:flex;gap:12px;
  padding:18px 16px;
  border-bottom:1px solid var(--divider);
}
.moment:last-child{border-bottom:none}
.moment-avatar{
  width:42px;height:42px;border-radius:6px;
  background:#ccc center/cover no-repeat;
  flex-shrink:0;
  align-self:center;
}
.moment-main{flex:1;min-width:0}
.moment-name{
  color:var(--link);font-weight:600;font-size:15px;
  margin-bottom:4px;
}
.moment-text{
  color:var(--text);
  word-wrap:break-word;word-break:break-word;
  white-space:pre-wrap;
  font-size:15px;line-height:1.55;
  margin-bottom:4px;
  position:relative;
  text-align:center;
}
.moment-text.collapsed{
  display:-webkit-box;
  -webkit-box-orient:vertical;
  -webkit-line-clamp:2;
  overflow:hidden;
}
.moment-text-toggle{
  display:none;
  color:var(--link);
  font-size:13px;
  cursor:pointer;
  margin:2px auto 8px;
  user-select:none;
  text-align:center;
}
.moment-text-toggle.show{display:block}

/* ===== 图片九宫格 ===== */
.moment-imgs{
  display:grid;gap:3px;
  margin:6px auto 8px;max-width:420px;
}
.moment-imgs.count-1{grid-template-columns:1fr;max-width:280px}
.moment-imgs.count-1 .grid-cell{aspect-ratio:auto;max-height:360px}
.moment-imgs.count-1 .grid-cell img{width:100%;height:auto;object-fit:contain;background:#000}
.moment-imgs.count-2,
.moment-imgs.count-4{grid-template-columns:repeat(2,1fr);max-width:280px}
.moment-imgs.count-3,
.moment-imgs.count-5,
.moment-imgs.count-6,
.moment-imgs.count-7,
.moment-imgs.count-8,
.moment-imgs.count-9{grid-template-columns:repeat(3,1fr)}
.grid-cell{
  position:relative;
  aspect-ratio:1/1;
  background:#e5e5e5;
  overflow:hidden;
  border-radius:3px;
  cursor:zoom-in;
}
.grid-cell img{width:100%;height:100%;object-fit:cover}

/* ===== 视频 ===== */
.moment-video{
  position:relative;
  max-width:360px;
  margin:6px auto 8px;
  border-radius:4px;
  overflow:hidden;
  background:#000;
}
.moment-video video,
.moment-video img{width:100%;max-height:400px;display:block;object-fit:contain;background:#000}
.moment-video .play-btn{
  position:absolute;inset:0;
  display:flex;align-items:center;justify-content:center;
  color:#fff;font-size:48px;
  text-shadow:0 2px 8px rgba(0,0,0,0.6);
  pointer-events:none;
}

/* ===== 音乐 ===== */
.moment-music{
  display:flex;align-items:center;gap:12px;
  max-width:360px;
  margin:6px auto 8px;
  padding:10px 14px;
  background:var(--bg);
  border-radius:6px;
  border:1px solid var(--border);
}
.moment-music .mi{font-size:24px;color:var(--link)}
.moment-music .mt{flex:1;min-width:0;font-size:13px}
.moment-music .mt b{display:block;color:var(--text);font-weight:500}
.moment-music .mt span{color:var(--muted);font-size:12px}

/* ===== 底部工具栏 ===== */
.moment-foot{
  display:flex;align-items:center;
  gap:12px;
  font-size:13px;color:var(--muted);
  margin-top:4px;
}
.moment-foot .time{flex:1}
.moment-foot .loc::before{content:"📍 ";font-size:11px}
.moment-foot a{color:var(--link);font-size:13px}

/* ===== 加载更多 ===== */
.footer-loader{
  text-align:center;padding:24px 0;
  color:var(--muted);font-size:13px;
}
.empty-state{
  text-align:center;padding:60px 20px;
  color:var(--muted);
}

/* ===== 悬浮按钮 ===== */
.float-tools{
  position:fixed;right:16px;bottom:24px;
  display:flex;flex-direction:column;gap:8px;z-index:100;
}
.float-tools button{
  width:40px;height:40px;border-radius:50%;
  border:none;cursor:pointer;
  background:var(--card);color:var(--text);
  box-shadow:0 2px 8px rgba(0,0,0,0.15);
  font-size:18px;
}
.float-tools button:hover{opacity:.85}

/* ===== 详情页 ===== */
.view-wrap{
  max-width:720px;margin:0 auto;padding:0 0 60px;
  background:var(--card);min-height:100vh;
}
.view-back{
  padding:14px 16px;font-size:14px;color:var(--link);
  border-bottom:1px solid var(--divider);
  display:flex;align-items:center;gap:6px;
}
.view-head{
  display:flex;gap:12px;padding:18px 16px 12px;
}
.view-head .avatar{
  width:48px;height:48px;border-radius:6px;
  background:#ccc center/cover no-repeat;flex-shrink:0;
}
.view-head .meta{flex:1;min-width:0}
.view-head .name{color:var(--link);font-weight:600;font-size:16px}
.view-head .time{color:var(--muted);font-size:12px;margin-top:2px}
.view-text{
  padding:0 16px 12px;
  white-space:pre-wrap;word-break:break-word;
  font-size:15px;line-height:1.7;
}
.view-media{padding:0 16px 16px}
.view-media img{width:100%;margin-bottom:6px;border-radius:4px;cursor:zoom-in}
.view-media video{width:100%;border-radius:4px;background:#000}
.view-foot{
  padding:12px 16px;border-top:1px solid var(--divider);
  color:var(--muted);font-size:13px;
  display:flex;gap:12px;
}

/* ===== 响应式 ===== */
@media(max-width:480px){
  .cover{height:200px}
  .moment-imgs{max-width:100%}
  .moment-imgs.count-1,.moment-imgs.count-2,.moment-imgs.count-4{max-width:240px}
}