:root{
  --ink:#12334E; --blue:#1665A8; --green:#147D63; --bg:#F2F7FB;
  --line:#D6E3ED; --muted:#5D7285; --red:#B4452F; --amber:#9A6B12;
  --card:#ffffff; --radius:16px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:#E7EEF5;
  color:var(--ink);
  font-family:"PingFang SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  -webkit-font-smoothing:antialiased;
  line-height:1.5;
}
.stage{min-height:100vh;display:flex;justify-content:center;align-items:flex-start;padding:0}
.phone{
  width:100%;max-width:430px;min-height:100vh;background:var(--bg);
  position:relative;box-shadow:0 0 24px rgba(18,51,78,.12);
}
@media(min-width:480px){.stage{padding:24px 0}.phone{min-height:calc(100vh - 48px);border-radius:24px;overflow:hidden}}

/* top bar */
.topbar{display:flex;align-items:center;justify-content:space-between;padding:14px 16px 6px}
.brand{font-weight:700;font-size:15px;color:var(--ink);display:flex;align-items:center;gap:8px}
.brand .logo{width:22px;height:22px;border-radius:6px;background:var(--blue);color:#fff;display:grid;place-items:center;font-size:12px;font-weight:700}
.localchip{font-size:10px;color:var(--amber);border:1px solid #E6D3A8;background:#FBF3DE;border-radius:999px;padding:2px 8px;white-space:nowrap}
.hero{padding:6px 16px 14px;background:linear-gradient(180deg,#DCEBF7 0%,var(--bg) 100%)}
.eyebrow{font-size:12px;color:var(--muted);margin:0 0 4px}
.h1{font-size:26px;font-weight:800;margin:0;letter-spacing:.5px}
.sub{font-size:12.5px;color:var(--muted);margin:6px 0 0}

/* generic */
.wrap{padding:0 16px 96px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:14px;margin:12px 0}
.card h3{margin:0 0 6px;font-size:15px}
.muted{color:var(--muted);font-size:12.5px}
.row{display:flex;align-items:center;gap:10px}
.spread{display:flex;justify-content:space-between;align-items:center;gap:10px}
.pill{display:inline-block;font-size:11px;border-radius:999px;padding:2px 9px;border:1px solid var(--line);color:var(--muted);background:#fff}
.pill.blue{background:#E4F0F9;color:var(--blue);border-color:#C9E0F2}
.pill.green{background:#E2F2EC;color:var(--green);border-color:#C4E6D8}
.pill.red{background:#F9E6E0;color:var(--red);border-color:#EFC7BC}
.pill.gray{background:#EEF3F7;color:var(--muted)}

.btn{display:flex;align-items:center;justify-content:center;gap:8px;width:100%;border:0;border-radius:12px;padding:14px;font-size:15px;font-weight:700;cursor:pointer}
.btn.primary{background:var(--green);color:#fff}
.btn.primary:active{filter:brightness(.95)}
.btn.ghost{background:#fff;color:var(--ink);border:1px solid var(--line)}
.btn[disabled]{opacity:.5;cursor:not-allowed}
.btnbar{position:sticky;bottom:0;background:linear-gradient(180deg,transparent,var(--bg) 30%);padding:10px 16px 16px}

/* course list */
.course{display:flex;gap:12px;padding:12px;border:1px solid var(--line);border-radius:14px;background:#fff;margin:10px 0;align-items:center}
.course .thumb{width:56px;height:56px;border-radius:10px;background:#DCEBF7;display:grid;place-items:center;color:var(--blue);font-weight:800;font-size:13px;flex:none}
.course .meta{flex:1;min-width:0}
.course .t{font-weight:700;font-size:14px}
.course .d{font-size:11.5px;color:var(--muted);margin-top:2px}
.status{font-size:11px;padding:3px 9px;border-radius:999px;white-space:nowrap}
.status.todo{background:#EEF3F7;color:var(--muted)}
.status.doing{background:#E4F0F9;color:var(--blue)}
.status.done{background:#E2F2EC;color:var(--green)}
.status.lock{background:#FBECE7;color:var(--red)}

/* stepper */
.stepper{display:flex;justify-content:space-between;align-items:flex-start;margin:8px 0 4px}
.step{flex:1;text-align:center;font-size:11px;color:var(--muted)}
.step .dot{width:30px;height:30px;border-radius:50%;background:#fff;border:2px solid var(--line);color:var(--muted);display:grid;place-items:center;margin:0 auto 4px;font-size:12px;font-weight:700}
.step.active .dot{background:var(--blue);border-color:var(--blue);color:#fff}
.step.done .dot{background:var(--green);border-color:var(--green);color:#fff}
.step .bar{flex:1;height:2px;background:var(--line);align-self:center;margin:15px -4px 18px}

/* KP list */
.kp{display:flex;gap:10px;padding:10px;border:1px solid var(--line);border-radius:12px;background:#fff;margin:8px 0}
.kp .time{font-weight:700;color:var(--blue);font-size:12px;white-space:nowrap}
.kp .kbt{font-weight:700;font-size:13.5px}
.kp .kbd{font-size:12px;color:var(--muted)}

/* PDF viewer */
.pages{display:flex;align-items:center;justify-content:space-between;margin:6px 0}
.pager{display:flex;gap:8px;align-items:center}
.pager button{width:34px;height:34px;border-radius:10px;border:1px solid var(--line);background:#fff;cursor:pointer;font-size:16px;color:var(--blue)}
.pagecanvas{background:#fff;border:1px solid var(--line);border-radius:12px;min-height:300px;display:grid;place-items:center;overflow:auto}
.scalebar{display:flex;gap:8px;justify-content:flex-end;margin:6px 0}
.scalebar button{border:1px solid var(--line);background:#fff;border-radius:8px;padding:4px 10px;cursor:pointer;color:var(--ink)}

/* form */
.field{margin:10px 0}
.field label{font-size:12px;color:var(--muted);display:block;margin-bottom:4px}
.field input,.field textarea{width:100%;border:1px solid var(--line);border-radius:10px;padding:10px;font:inherit;font-size:13px;background:#FBFDFE}
.field textarea{min-height:60px;resize:vertical}
.tagconfirmed{color:var(--green);font-size:11px}
.tagpending{color:var(--amber);font-size:11px}

/* report bars */
.dimrow{display:flex;align-items:center;gap:10px;margin:8px 0}
.dimrow .ic{width:26px;height:26px;border-radius:8px;background:#E4F0F9;color:var(--blue);display:grid;place-items:center;font-weight:700;font-size:11px;flex:none}
.dimrow .nm{width:78px;font-size:12.5px;flex:none}
.dimrow .track{flex:1;height:8px;background:#EAF0F5;border-radius:99px;overflow:hidden}
.dimrow .fill{height:100%;background:var(--blue)}
.dimrow .sc{width:64px;text-align:right;font-size:11.5px;color:var(--muted);flex:none}

/* empty / blocked states */
.empty{text-align:center;padding:26px 18px;color:var(--muted)}
.empty .big{font-size:34px;margin-bottom:8px}
.blocked{border:1px dashed #E0B7A8;background:#FBEFEA;border-radius:14px;padding:16px;color:#8A3A28;font-size:13px}
.notevideo{border:1px dashed #BFD6E8;background:#EEF6FC;border-radius:14px;padding:16px;color:var(--blue);font-size:13px}
.disclaimer{font-size:10.5px;color:var(--muted);text-align:center;padding:8px 16px 18px}

/* bottom nav */
.botnav{position:fixed;bottom:0;left:50%;transform:translateX(-50%);width:100%;max-width:430px;background:#fff;border-top:1px solid var(--line);display:flex;z-index:20}
.botnav a{flex:1;text-align:center;padding:9px 0 11px;font-size:11px;color:var(--muted);text-decoration:none}
.botnav a.on{color:var(--blue);font-weight:700}
.botnav a .ic{display:block;font-size:16px;margin-bottom:2px}

.quote{border-left:3px solid var(--blue);padding:6px 10px;background:#F4F9FD;border-radius:0 8px 8px 0;font-style:italic;color:var(--ink)}
.hidden{display:none!important}
.toast{position:fixed;left:50%;bottom:90px;transform:translateX(-50%);background:var(--ink);color:#fff;padding:9px 14px;border-radius:10px;font-size:12.5px;z-index:50;opacity:.95;max-width:80%;text-align:center}