/* ==========================================================================
   拾光相册 · 移动端样式   主题色 rgb(255,122,0)
   ========================================================================== */
:root{
  --brand: rgb(255,122,0);
  --brand-600:#ef6f00;
  --brand-050:#fff4ea;
  --bg:#f5f6f8;
  --card:#fff;
  --text:#1f2329;
  --sub:#8a9099;
  --line:#eceef1;
  --mask:rgba(0,0,0,.5);
  --header-h:48px;
  --toolbar-h:46px;
  --safe-top:env(safe-area-inset-top,0px);
  --safe-bottom:env(safe-area-inset-bottom,0px);
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent;scrollbar-width:none;-ms-overflow-style:none;}
*::-webkit-scrollbar{width:0;height:0;display:none;}
html,body{margin:0;padding:0;}
body{
  background:var(--bg);color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Helvetica Neue",Arial,"Microsoft YaHei",sans-serif;
  font-size:14px;line-height:1.5;-webkit-font-smoothing:antialiased;
}
img{display:block;}
a{color:inherit;text-decoration:none;}
.hidden{display:none !important;}

/* ---------- 头部 ---------- */
.app-header{
  position:sticky;top:0;z-index:50;
  height:calc(var(--header-h) + var(--safe-top));padding-top:var(--safe-top);
  padding-left:14px;padding-right:8px;
  background:var(--brand);color:#fff;
  display:flex;align-items:center;justify-content:space-between;
  box-shadow:0 1px 6px rgba(0,0,0,.14);
}
.app-title{font-size:17px;font-weight:700;letter-spacing:.5px;display:flex;align-items:center;gap:7px;}
.app-title .dot{width:8px;height:8px;border-radius:50%;background:#fff;opacity:.92;}
.app-nav{display:flex;gap:2px;}
.nav-link{padding:6px 13px;border-radius:16px;font-size:14px;color:rgba(255,255,255,.85);transition:.2s;}
.nav-link.active{background:rgba(255,255,255,.22);color:#fff;font-weight:600;}

/* ---------- 工具栏 ---------- */
.toolbar{
  position:sticky;top:calc(var(--header-h) + var(--safe-top));z-index:40;
  height:var(--toolbar-h);background:var(--card);border-bottom:1px solid var(--line);
  display:flex;align-items:center;gap:8px;padding:0 12px;
}
.tool-btn{
  border:1px solid var(--line);background:#fff;color:var(--text);
  height:30px;padding:0 12px;border-radius:15px;font-size:13px;
  display:inline-flex;align-items:center;gap:5px;cursor:pointer;
}
.tool-btn:active{border-color:var(--brand);color:var(--brand);}
.tool-btn .arrow{font-size:10px;color:var(--sub);}
.result-count{margin-left:auto;color:var(--sub);font-size:12px;}

/* ---------- chip（标签 / 分组按钮）---------- */
.chip{
  flex:0 0 auto;border:1px solid var(--line);background:#fff;color:var(--text);
  height:28px;padding:0 14px;border-radius:14px;font-size:13px;cursor:pointer;white-space:nowrap;
}
.chip.active{background:var(--brand);border-color:var(--brand);color:#fff;font-weight:600;}

/* ---------- 网格 ---------- */
.grid{display:grid;padding:6px;gap:6px;}
.grid-square{grid-template-columns:repeat(3,1fr);}
.grid-rect{grid-template-columns:repeat(2,1fr);gap:10px;padding:10px;}
.cell{position:relative;overflow:hidden;background:#eef0f3;border-radius:6px;}
.grid-rect .cell{border-radius:10px;}
.grid-square .cell{aspect-ratio:1/1;}
.grid-rect .cell{aspect-ratio:16/10;}
.cell img{width:100%;height:100%;object-fit:cover;}
.play{
  position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
  width:46px;height:46px;border-radius:50%;
  background:rgba(0,0,0,.4);border:2px solid rgba(255,255,255,.92);
  display:flex;align-items:center;justify-content:center;pointer-events:none;
}
.play::after{content:'';margin-left:3px;border-style:solid;border-width:9px 0 9px 15px;border-color:transparent transparent transparent #fff;}
.cell-title{
  position:absolute;left:0;right:0;bottom:0;padding:18px 8px 6px;font-size:12px;color:#fff;
  background:linear-gradient(transparent,rgba(0,0,0,.62));
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}

/* ---------- 加载 / 空态 ---------- */
.loader,.empty{text-align:center;color:var(--sub);padding:20px;font-size:13px;}
.sentinel{height:1px;}

/* ---------- 底部抽屉 ---------- */
.sheet{position:fixed;inset:0;z-index:100;}
.sheet-mask{position:absolute;inset:0;background:var(--mask);}
.sheet-panel{
  position:absolute;left:0;right:0;bottom:0;background:#fff;
  border-radius:16px 16px 0 0;max-height:78vh;display:flex;flex-direction:column;
  padding-bottom:var(--safe-bottom);animation:slideUp .22s ease;
}
@keyframes slideUp{from{transform:translateY(100%);}to{transform:translateY(0);}}
.sheet-head{display:flex;align-items:center;justify-content:space-between;padding:14px 16px;border-bottom:1px solid var(--line);}
.sheet-title{font-size:16px;font-weight:600;}
.sheet-body{padding:8px 16px;overflow-y:auto;-webkit-overflow-scrolling:touch;}
.sheet-foot{display:flex;gap:12px;padding:12px 16px;border-top:1px solid var(--line);}

/* 排序选项 */
.opt{display:flex;align-items:center;justify-content:space-between;padding:14px 4px;border-bottom:1px solid var(--line);font-size:15px;cursor:pointer;}
.opt:last-child{border-bottom:none;}
.opt.active{color:var(--brand);font-weight:600;}
.opt .tick{opacity:0;}
.opt.active .tick{opacity:1;}

/* 标签分组 */
.tag-group{margin:6px 0 16px;}
.tag-group h4{margin:0 0 10px;font-size:13px;color:var(--sub);font-weight:600;}
.tag-list{display:flex;flex-wrap:wrap;gap:8px;}

/* 日期范围（年 / 月选择） */
.date-range{display:flex;flex-direction:column;gap:10px;}
.date-row{display:flex;align-items:center;gap:8px;}
.date-label{flex:0 0 22px;color:var(--sub);font-size:13px;}
.ym-select{flex:1;height:36px;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--text);font-size:14px;padding:0 8px;}
.ym-select:focus{outline:none;border-color:var(--brand);}

/* 匹配方式切换 */
.match-toggle{display:flex;background:#f2f3f5;border-radius:14px;padding:2px;}
.match-toggle button{border:none;background:transparent;height:24px;padding:0 11px;border-radius:12px;font-size:12px;color:var(--sub);cursor:pointer;}
.match-toggle button.active{background:#fff;color:var(--brand);font-weight:600;box-shadow:0 1px 3px rgba(0,0,0,.12);}

/* 按钮 */
.btn{flex:1;height:42px;border-radius:21px;border:none;font-size:15px;cursor:pointer;}
.btn-primary{background:var(--brand);color:#fff;font-weight:600;}
.btn-ghost{background:#f2f3f5;color:var(--text);}

/* ---------- 详情弹层 ---------- */
.detail{position:fixed;inset:0;z-index:200;display:flex;flex-direction:column;background:#000;}
.detail-top{display:flex;align-items:center;justify-content:space-between;height:calc(46px + var(--safe-top));padding-top:var(--safe-top);color:#fff;}
.detail-top .cap{margin-left:16px;font-size:15px;font-weight:600;}
.detail-actions{display:flex;align-items:center;gap:8px;margin-right:12px;}
.detail-btn{background:rgba(255,255,255,.16);border:none;color:#fff;height:32px;padding:0 14px;border-radius:16px;font-size:13px;cursor:pointer;}
.detail-btn:active{background:var(--brand);}
.detail-close{background:rgba(255,255,255,.16);border:none;color:#fff;width:32px;height:32px;border-radius:50%;font-size:22px;line-height:1;cursor:pointer;margin:0;}
.detail-media{flex:0 0 auto;height:42vh;margin:10px 12px;border-radius:12px;display:flex;align-items:center;justify-content:center;background:#000;overflow:hidden;}
.detail-media img{max-width:100%;max-height:100%;object-fit:contain;cursor:zoom-in;border-radius: 10px;}
.detail-media video{max-width:100%;max-height:100%;object-fit:contain;background:#000;}
.detail-info{flex:1 1 auto;overflow-y:auto;background:#fff;border-radius:16px 16px 0 0;padding:16px 16px calc(22px + var(--safe-bottom));-webkit-overflow-scrolling:touch;}
.info-title{font-size:16px;font-weight:700;margin:0 0 8px;}
.info-row{display:flex;padding:8px 0;border-bottom:1px solid var(--line);font-size:13px;}
.info-row .k{flex:0 0 74px;color:var(--sub);}
.info-row .v{flex:1;color:var(--text);word-break:break-all;}
.info-row .v a{color:var(--brand);}
.info-notes{margin-top:12px;font-size:14px;line-height:1.75;color:#333;}
.info-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px;}
.info-title + .info-tags{margin-top:2px;margin-bottom:10px;}
.info-tag{background:var(--brand-050);color:var(--brand-600);border-radius:12px;padding:3px 11px;font-size:12px;}

/* ---------- Toast ---------- */
.toast{
  position:fixed;left:50%;bottom:90px;transform:translateX(-50%);
  background:rgba(0,0,0,.82);color:#fff;padding:9px 18px;border-radius:18px;font-size:13px;
  z-index:999;opacity:0;transition:.25s;pointer-events:none;max-width:80%;text-align:center;
}
.toast.show{opacity:1;}

/* ---------- 回到顶部 ---------- */
.back-top{
  position:fixed;right:16px;bottom:calc(26px + var(--safe-bottom));
  width:44px;height:44px;border-radius:50%;border:none;
  background:var(--brand);color:#fff;
  box-shadow:0 4px 14px rgba(0,0,0,.28);
  display:flex;align-items:center;justify-content:center;
  z-index:80;cursor:pointer;
  opacity:0;visibility:hidden;transform:translateY(12px) scale(.9);
  transition:opacity .25s,transform .25s,visibility .25s;
}
.back-top.show{opacity:1;visibility:visible;transform:translateY(0) scale(1);}
.back-top:active{background:var(--brand-600);}
.back-top svg{width:22px;height:22px;fill:none;stroke:#fff;stroke-width:2.4;stroke-linecap:round;stroke-linejoin:round;}

/* ---------- 图片缩放查看器 ---------- */
.zoom-viewer{position:fixed;inset:0;z-index:300;background:rgba(0,0,0,.96);overflow:hidden;touch-action:none;display:flex;align-items:center;justify-content:center;}
.zoom-img{max-width:100%;max-height:100%;object-fit:contain;transform-origin:center center;transition:transform .12s ease-out;will-change:transform;user-select:none;-webkit-user-drag:none;}
.zoom-img.dragging{transition:none;}
.zoom-close{position:absolute;top:calc(10px + var(--safe-top));right:14px;width:36px;height:36px;border-radius:50%;border:none;background:rgba(255,255,255,.16);color:#fff;font-size:24px;line-height:1;cursor:pointer;z-index:2;}
.zoom-bar{position:absolute;left:50%;bottom:calc(24px + var(--safe-bottom));transform:translateX(-50%);display:flex;gap:10px;z-index:2;}
.zoom-bar button{min-width:48px;height:38px;padding:0 15px;border-radius:19px;border:none;background:rgba(255,255,255,.16);color:#fff;font-size:18px;cursor:pointer;}
.zoom-bar button:active{background:var(--brand);}
.zoom-hint{position:absolute;left:0;right:0;bottom:calc(76px + var(--safe-bottom));text-align:center;color:rgba(255,255,255,.5);font-size:12px;z-index:1;pointer-events:none;}

/* ---------- 剪影（竖向全屏 feed）---------- */
.page-sil{background:#000;}
.page-sil .app-header{position:fixed;left:0;right:0;top:0;z-index:60;background:linear-gradient(rgba(0,0,0,.55),rgba(0,0,0,0));box-shadow:none;}
.sil-feed{position:fixed;inset:0;overflow-y:auto;scroll-snap-type:y mandatory;-webkit-overflow-scrolling:touch;background:#000;}
.sil-item{position:relative;height:100%;scroll-snap-align:start;scroll-snap-stop:always;overflow:hidden;background:#000;}
.sil-media{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;padding:calc(var(--header-h) + var(--safe-top) + 10px) 16px calc(100px + var(--safe-bottom));}
.sil-media img,.sil-media video{width:100%;height:100%;object-fit:contain;background:#000;}
.sil-overlay{position:absolute;left:0;right:0;bottom:0;z-index:2;padding:16px 16px calc(20px + var(--safe-bottom));background:linear-gradient(transparent,rgba(0,0,0,.72));display:flex;align-items:flex-end;justify-content:space-between;gap:12px;}
.sil-meta{color:#fff;min-width:0;flex:1;}
.sil-title{font-size:15px;font-weight:600;margin-bottom:4px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.sil-sub{font-size:12px;color:rgba(255,255,255,.78);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.sil-detail-btn{flex:0 0 auto;height:36px;padding:0 20px;border-radius:18px;border:none;background:var(--brand);color:#fff;font-size:14px;font-weight:600;cursor:pointer;box-shadow:0 2px 10px rgba(0,0,0,.3);}