:root{
  --bg:#f4f6f9; --card:#fff; --ink:#1b2430; --muted:#7b8698; --line:#e6eaf0;
  --pri:#2f6bff; --pri-d:#1e4fd6; --ok:#16a34a; --warn:#f59e0b; --grad:linear-gradient(135deg,#3b7bff,#2f6bff 45%,#5b3bff);
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;padding:0}
body{background:var(--bg);color:var(--ink);font:15px/1.6 -apple-system,BlinkMacSystemFont,"PingFang SC","Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
     padding-bottom:calc(64px + env(safe-area-inset-bottom));-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%}
.wrap{max-width:760px;margin:0 auto;padding:0 14px}
.hd{position:sticky;top:0;z-index:20;background:rgba(244,246,249,.92);backdrop-filter:saturate(180%) blur(12px);
    border-bottom:1px solid var(--line);padding:10px 0}
.hd .wrap{display:flex;align-items:center;gap:10px}
.hd .ttl{font-weight:700;font-size:17px;flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.hd .back{width:34px;height:34px;border-radius:50%;background:#fff;border:1px solid var(--line);display:grid;place-items:center;font-size:17px}
.card{background:var(--card);border-radius:16px;box-shadow:0 1px 2px rgba(16,24,40,.05),0 8px 24px -16px rgba(16,24,40,.25);padding:14px;margin:12px 0}
.muted{color:var(--muted)}
.sm{font-size:13px}
.xs{font-size:12px}
.row{display:flex;align-items:center;gap:10px}
.grow{flex:1;min-width:0}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;height:44px;padding:0 18px;border-radius:12px;
     background:var(--pri);color:#fff;font-weight:600;border:0;font-size:15px;cursor:pointer}
.btn:active{background:var(--pri-d)}
.btn.block{width:100%}
.btn.ghost{background:#fff;color:var(--ink);border:1px solid var(--line)}
.btn.sm2{height:34px;padding:0 12px;font-size:13px;border-radius:9px}
.pill{display:inline-block;padding:2px 9px;border-radius:999px;font-size:12px;background:#eef2fb;color:var(--pri);font-weight:600}
.pill.ok{background:#e8f7ee;color:var(--ok)}
.pill.gray{background:#f1f3f7;color:var(--muted)}
.bar{height:6px;border-radius:99px;background:#eef1f6;overflow:hidden}
.bar>i{display:block;height:100%;background:var(--grad);border-radius:99px;transition:width .4s}
.divider{height:1px;background:var(--line);margin:12px 0}
.hero{background:var(--grad);border-radius:20px;color:#fff;padding:18px;margin-top:12px;box-shadow:0 12px 30px -16px rgba(47,107,255,.8)}
.hero .big{font-size:30px;font-weight:800;line-height:1.1}
.hero .grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:8px;margin-top:14px}
.hero .grid div{background:rgba(255,255,255,.14);border-radius:12px;padding:8px 10px}
.hero .grid b{display:block;font-size:18px}
.hero .grid span{font-size:11px;opacity:.85}
.tabbar{position:fixed;left:0;right:0;bottom:0;z-index:30;background:rgba(255,255,255,.96);backdrop-filter:blur(12px);
        border-top:1px solid var(--line);display:flex;padding-bottom:env(safe-area-inset-bottom)}
.tabbar a{flex:1;text-align:center;padding:8px 0;color:var(--muted);font-size:11px}
.tabbar a.on{color:var(--pri);font-weight:700}
.tabbar .ic{display:block;font-size:20px;line-height:1.2}
.list-item{display:flex;align-items:center;gap:12px;padding:12px 0;border-bottom:1px solid var(--line)}
.list-item:last-child{border-bottom:0}
.thumb{width:84px;height:52px;border-radius:10px;background:#dfe6f2 center/cover no-repeat;position:relative;flex:none;display:grid;place-items:center;color:#fff;font-size:18px}
.thumb .pl{position:absolute;inset:0;display:grid;place-items:center;background:rgba(15,25,45,.28);border-radius:10px}
.num{width:26px;height:26px;border-radius:50%;background:#eef2fb;color:var(--pri);display:grid;place-items:center;font-size:12px;font-weight:700;flex:none}
.num.done{background:#e8f7ee;color:var(--ok)}
.empty{text-align:center;color:var(--muted);padding:40px 10px}
.notice{background:#fff8e6;border:1px solid #ffe2a8;color:#8a5a00;border-radius:12px;padding:10px 12px;font-size:13px;margin:12px 0}
/* login */
.login-wrap{min-height:100vh;display:flex;flex-direction:column;justify-content:center;padding:24px;
            background:radial-gradient(1200px 600px at 50% -10%,#dbe6ff,transparent),var(--bg)}
.login-logo{width:72px;height:72px;border-radius:22px;background:var(--grad);display:grid;place-items:center;color:#fff;font-size:32px;margin:0 auto 14px;box-shadow:0 14px 30px -14px rgba(47,107,255,.9)}
.field{margin:10px 0}
.field label{display:block;font-size:13px;color:var(--muted);margin-bottom:6px}
.field input{width:100%;height:50px;border-radius:14px;border:1px solid var(--line);background:#fff;padding:0 14px;font-size:16px;outline:none}
.field input:focus{border-color:var(--pri);box-shadow:0 0 0 3px rgba(47,107,255,.12)}
.err{background:#fdecec;color:#c0392b;border-radius:12px;padding:10px 12px;font-size:13px;margin:8px 0}
/* player */
.player{background:#000;position:relative}
.player video{width:100%;display:block;max-height:56vh;background:#000}
.mask{position:absolute;inset:0;display:grid;place-items:center;background:radial-gradient(circle at 50% 50%,rgba(0,0,0,.15),rgba(0,0,0,.55));cursor:pointer}
.mask .ring{width:74px;height:74px;border-radius:50%;background:rgba(255,255,255,.92);display:grid;place-items:center;box-shadow:0 10px 30px rgba(0,0,0,.35)}
.mask .ring:after{content:"";display:block;width:0;height:0;border-left:22px solid var(--pri);border-top:14px solid transparent;border-bottom:14px solid transparent;margin-left:6px}
.pl-list a{display:flex;gap:10px;align-items:center;padding:10px 0;border-bottom:1px solid var(--line)}
.pl-list a.cur{color:var(--pri);font-weight:700}
/* doc viewer */
.viewer{background:#fff;border-radius:14px;overflow:hidden;border:1px solid var(--line)}
.viewer .pbar{display:flex;align-items:center;gap:8px;padding:8px 10px;background:#f7f9fc;border-bottom:1px solid var(--line);font-size:13px}
.viewer .canvas-wrap{overflow:auto;max-height:74vh;background:#eef1f6;text-align:center;padding:8px}
.viewer canvas{box-shadow:0 2px 12px rgba(0,0,0,.12);max-width:100%;height:auto;background:#fff}
table.xt{border-collapse:collapse;font-size:13px;width:100%}
table.xt td,table.xt th{border:1px solid var(--line);padding:6px 8px;white-space:nowrap}
table.xt th{background:#f7f9fc;position:sticky;top:0}
.sheet-tabs{display:flex;gap:6px;overflow:auto;padding:8px 0}
.sheet-tabs button{border:1px solid var(--line);background:#fff;border-radius:8px;padding:4px 10px;font-size:12px;white-space:nowrap}
.sheet-tabs button.on{background:var(--pri);color:#fff;border-color:var(--pri)}
@media (min-width:761px){ body{padding-bottom:24px} .tabbar{display:none} }