:root{
  --blue:#3370ff; --blue-d:#245bdb; --blue-l:#eef3ff;
  --bg:#f5f6f8; --card:#ffffff;
  --text:#1f2329; --text2:#646a73; --text3:#8f959e;
  --line:#e5e6eb;
  --green:#34c724; --green-l:#eafaf0;
  --radius:12px;
  --shadow:0 1px 3px rgba(31,35,41,.06),0 4px 14px rgba(31,35,41,.04);
  --tabbar-h:54px;
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;background:#e9ebf0;color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:15px;line-height:1.6;}
.app{max-width:480px;margin:0 auto;background:var(--bg);min-height:100vh;
  padding-bottom:calc(var(--tabbar-h) + env(safe-area-inset-bottom));}

/* header / hero */
.hd{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.94);
  backdrop-filter:saturate(180%) blur(10px);border-bottom:1px solid var(--line);}
.hero{padding:18px 16px 14px;background:linear-gradient(135deg,#3370ff,#5b8cff);color:#fff;}
.hero h1{margin:0;font-size:20px;font-weight:700;letter-spacing:.5px}
.hero p{margin:6px 0 0;font-size:12.5px;opacity:.92}
.search{margin:12px 16px 0;display:flex;align-items:center;background:var(--bg);
  border:1px solid var(--line);border-radius:22px;padding:9px 14px;gap:8px;}
.search input{flex:1;border:0;background:transparent;outline:none;font-size:15px;color:var(--text);}
.search .ic{color:var(--text3);font-size:15px}

/* chips */
.chips{display:flex;gap:8px;overflow-x:auto;padding:12px 16px 6px;scrollbar-width:none;}
.chips::-webkit-scrollbar{display:none}
.chip{flex:0 0 auto;padding:6px 14px;border-radius:16px;background:#fff;border:1px solid var(--line);
  font-size:13px;color:var(--text2);white-space:nowrap;}
.chip.on{background:var(--blue);border-color:var(--blue);color:#fff;font-weight:600}

/* section title */
.sec{display:flex;align-items:center;justify-content:space-between;padding:16px 16px 4px;}
.sec h2{margin:0;font-size:15px;font-weight:700;color:var(--text)}
.sec .more{font-size:12px;color:var(--text3)}

/* feed */
.feed{padding:6px 12px 8px;}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:14px;margin-bottom:10px;box-shadow:var(--shadow);cursor:pointer;
  transition:transform .08s ease, box-shadow .15s;}
.card:active{transform:scale(.985)}
.card .row{display:flex;align-items:center;gap:6px;margin-bottom:7px}
.card .badge{font-size:11px;color:var(--blue);background:var(--blue-l);border-radius:6px;padding:2px 8px;font-weight:600}
.card .date{margin-left:auto;font-size:11px;color:var(--text3)}
.card h3{margin:0 0 6px;font-size:16px;line-height:1.4;font-weight:600}
.card .snip{font-size:13px;color:var(--text2);line-height:1.6;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.card .ft{margin-top:9px;display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.tag{font-size:11px;color:var(--text3);background:var(--bg);border-radius:5px;padding:2px 7px}
.tag.hasimg{color:var(--green);background:var(--green-l)}

/* category grid */
.grid{padding:12px;display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.tile{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:16px;box-shadow:var(--shadow);cursor:pointer;display:flex;flex-direction:column;gap:6px;
  transition:transform .08s}
.tile:active{transform:scale(.98)}
.tile .emo{font-size:26px}
.tile .nm{font-size:15px;font-weight:600}
.tile .ct{font-size:12px;color:var(--text3)}

/* article */
.art{background:#fff;min-height:100vh}
.abar{position:sticky;top:0;z-index:30;background:#fff;border-bottom:1px solid var(--line);
  display:flex;align-items:center;gap:8px;padding:11px 12px;}
.abar .back{font-size:15px;color:var(--blue);cursor:pointer;padding:4px 4px;font-weight:600}
.abar .at{font-size:14px;font-weight:600;flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.acontent{padding:18px 18px 0;max-width:480px;margin:0 auto}
.acontent h1{font-size:23px;margin:0 0 .2em;line-height:1.3;font-weight:700}
.acontent .ameta{font-size:12px;color:var(--text3);margin:0 0 14px;display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.acontent .ameta .badge{color:var(--blue);background:var(--blue-l);border-radius:6px;padding:2px 8px;font-weight:600}
.acontent h2{font-size:18px;margin:1.2em 0 .5em;padding-left:9px;border-left:4px solid var(--blue)}
.acontent h3{font-size:16px;margin:1em 0 .4em}
.acontent p{margin:.7em 0}
.acontent img{max-width:100%;border-radius:10px;margin:12px 0;display:block;box-shadow:var(--shadow)}
.acontent ul,.acontent ol{margin:.5em 0;padding-left:1.4em}
.acontent li{margin:.3em 0}
.acontent blockquote{margin:.9em 0;padding:10px 14px;background:var(--bg);border-left:3px solid var(--line);color:var(--text2);border-radius:0 8px 8px 0}
.acontent code{background:var(--bg);padding:1px 5px;border-radius:4px;font-size:13px}
.acontent a{color:var(--blue)}
.refs{margin:24px 18px 0;max-width:480px;margin-left:auto;margin-right:auto;border-top:1px solid var(--line);padding-top:14px;font-size:12px;color:var(--text3)}
.refs a{color:var(--blue);word-break:break-all;display:block;margin-top:4px}
.related{margin:24px 12px 0}
.related .rt{font-size:14px;font-weight:700;padding:0 4px 8px}

/* me */
.mehd{background:linear-gradient(135deg,#3370ff,#5b8cff);color:#fff;padding:30px 18px 24px}
.mehd .logo{font-size:42px}
.mehd h1{margin:10px 0 2px;font-size:20px}
.mehd p{margin:0;font-size:12.5px;opacity:.92}
.stats{display:flex;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  margin:-14px 12px 0;position:relative;box-shadow:var(--shadow);overflow:hidden}
.stats .s{flex:1;text-align:center;padding:14px 4px}
.stats .s+.s{border-left:1px solid var(--line)}
.stats .num{font-size:20px;font-weight:700;color:var(--blue)}
.stats .lbl{font-size:11px;color:var(--text3);margin-top:2px}
.panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);margin:12px;
  box-shadow:var(--shadow);overflow:hidden}
.panel .ph{padding:12px 14px;font-size:14px;font-weight:700;border-bottom:1px solid var(--line)}
.panel .pi{display:flex;align-items:center;gap:10px;padding:13px 14px;font-size:14px;color:var(--text)}
.panel .pi+.pi{border-top:1px solid var(--line)}
.panel .pi .ic{font-size:17px;width:22px;text-align:center}
.panel .pi .ar{margin-left:auto;color:var(--text3)}

/* tabbar */
.tabbar{position:fixed;bottom:0;left:50%;transform:translateX(-50%);width:100%;max-width:480px;
  height:calc(var(--tabbar-h) + env(safe-area-inset-bottom));background:#fff;
  border-top:1px solid var(--line);display:flex;z-index:40;
  padding-bottom:env(safe-area-inset-bottom);}
.tab{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;
  color:var(--text3);text-decoration:none;font-size:11px;}
.tab svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.tab.on{color:var(--blue)}
.tab span{line-height:1}

/* misc */
.empty{padding:70px 20px;text-align:center;color:var(--text3)}
.empty .e{font-size:40px;margin-bottom:10px}
.tipbar{margin:10px 12px;background:#fff;border:1px solid var(--line);border-radius:10px;
  padding:12px 14px;font-size:13px;color:var(--text2);display:flex;align-items:flex-start;gap:8px;
  box-shadow:var(--shadow)}
.tipbar .x{margin-left:auto;color:var(--text3);cursor:pointer;padding:0 2px}
.fade{animation:fade .25s ease}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}

/* 浮动添加按钮 */
.fab{position:fixed;left:50%;bottom:calc(var(--tabbar-h) + 18px + env(safe-area-inset-bottom));
  transform:translateX(-50%);width:54px;height:54px;border-radius:50%;border:0;
  background:var(--blue);color:#fff;font-size:28px;line-height:1;font-weight:300;
  box-shadow:0 6px 18px rgba(51,112,255,.45);z-index:50;cursor:pointer;
  display:flex;align-items:center;justify-content:center;}
.fab:active{transform:translateX(-50%) scale(.94)}

/* 添加弹窗 */
.modal{position:fixed;inset:0;background:rgba(0,0,0,.45);z-index:60;display:none;
  align-items:flex-end;justify-content:center;}
.modal.show{display:flex}
.sheet{width:100%;max-width:480px;background:#fff;border-radius:18px 18px 0 0;
  padding:14px 16px calc(18px + env(safe-area-inset-bottom));box-shadow:0 -4px 24px rgba(0,0,0,.15);
  animation:slideUp .25s ease;}
@keyframes slideUp{from{transform:translateY(100%)}to{transform:translateY(0)}}
.sheet-hd{display:flex;align-items:center;justify-content:space-between;font-size:16px;font-weight:700;margin-bottom:12px}
.sheet-hd .x{color:var(--text3);font-size:20px;padding:0 6px;cursor:pointer}
.seg{display:flex;background:var(--bg);border-radius:10px;padding:4px;gap:4px;margin-bottom:12px}
.seg-btn{flex:1;border:0;background:transparent;border-radius:8px;padding:8px 0;font-size:14px;color:var(--text2);cursor:pointer}
.seg-btn.on{background:#fff;color:var(--blue);font-weight:700;box-shadow:var(--shadow)}
.add-body .fld{display:flex;flex-direction:column;gap:10px}
.add-body input,.add-body textarea{width:100%;border:1px solid var(--line);border-radius:10px;
  padding:11px 12px;font-size:15px;outline:none;font-family:inherit;background:#fff;color:var(--text);box-sizing:border-box}
.add-body input:focus,.add-body textarea:focus{border-color:var(--blue)}
.add-body textarea{resize:vertical}
.add-submit{width:100%;margin-top:14px;border:0;border-radius:12px;background:var(--blue);color:#fff;
  font-size:16px;font-weight:600;padding:13px 0;cursor:pointer}
.add-submit:active{background:var(--blue-d)}
.add-tip{margin-top:10px;font-size:13px;color:var(--text3);text-align:center;min-height:18px;display:none}
.add-tip.show{display:block}
.add-tip:empty{display:none}

/* 我的收藏卡片 */
.card.fav .favrow{margin:-2px 0 8px}
.card.fav .favimg{width:100%;max-height:180px;object-fit:cover;border-radius:10px;display:block}