/* 员工培训系统 · 第一期 —— 样式 */
:root{
  --blue:#0f4c81; --blue-d:#0a3a63; --blue-l:#e8f0f8;
  --green:#0f6e56; --green-l:#e6f4ef;
  --red:#a32d2d; --red-l:#fbecec;
  --amber:#854f0b; --amber-l:#fdf4e7;
  --ink:#1f2430; --ink2:#4b5563; --ink3:#8a93a0;
  --line:#e3e7ed; --bg:#f4f6f9; --card:#fff;
  --r:10px;
}
*{box-sizing:border-box;}
html,body{height:100%;}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei","PingFang SC",sans-serif;
  font-size:14px;line-height:1.65;-webkit-font-smoothing:antialiased;
}
a{color:var(--blue);text-decoration:none;}
button{font-family:inherit;font-size:14px;cursor:pointer;}
input,select,textarea{font-family:inherit;font-size:14px;}

/* ---------- 通用件 ---------- */
.card{background:var(--card);border-radius:var(--r);box-shadow:0 1px 3px rgba(16,24,40,.06);padding:20px 22px;margin-bottom:16px;}
.card h3{margin:0 0 14px;font-size:15px;}
.muted{color:var(--ink3);font-size:12.5px;}
.row{display:flex;gap:12px;flex-wrap:wrap;align-items:center;}
.grow{flex:1;}
.btn{padding:8px 16px;border-radius:8px;border:1px solid var(--line);background:#fff;color:var(--ink);transition:.15s;}
.btn:hover{border-color:#c3ccd8;background:#fafbfd;}
.btn.primary{background:var(--blue);border-color:var(--blue);color:#fff;}
.btn.primary:hover{background:var(--blue-d);}
.btn.danger{color:var(--red);border-color:#eccfcf;}
.btn.danger:hover{background:var(--red-l);}
.btn.sm{padding:5px 11px;font-size:13px;}
.btn:disabled{opacity:.5;cursor:not-allowed;}
.tag{display:inline-block;font-size:11.5px;padding:2px 8px;border-radius:20px;background:var(--blue-l);color:var(--blue-d);font-weight:600;}
.tag.g{background:var(--green-l);color:var(--green);}
.tag.r{background:var(--red-l);color:var(--red);}
.tag.a{background:var(--amber-l);color:var(--amber);}
.tag.n{background:#eef1f5;color:var(--ink2);}
table.t{width:100%;border-collapse:collapse;font-size:13.5px;}
table.t th{background:#f7f9fc;text-align:left;padding:10px 12px;font-weight:600;color:var(--ink2);border-bottom:1px solid var(--line);white-space:nowrap;}
table.t td{padding:10px 12px;border-bottom:1px solid var(--line);vertical-align:middle;}
table.t tr:last-child td{border-bottom:none;}
.empty{padding:44px 20px;text-align:center;color:var(--ink3);}
.field{margin-bottom:14px;}
.field label{display:block;font-size:13px;color:var(--ink2);margin-bottom:5px;font-weight:600;}
.field input[type=text],.field input[type=password],.field input[type=number],.field select,.field textarea{
  width:100%;padding:9px 12px;border:1px solid var(--line);border-radius:8px;background:#fff;outline:none;}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(15,76,129,.08);}

/* ---------- 登录 ---------- */
.login-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px;}
.login-box{width:100%;max-width:390px;background:#fff;border-radius:14px;box-shadow:0 8px 30px rgba(16,24,40,.10);padding:38px 34px 30px;}
.login-box h1{font-size:20px;margin:0 0 6px;color:var(--blue-d);}
.login-box .sub{font-size:13px;color:var(--ink3);margin:0 0 26px;}
.login-box .btn{width:100%;padding:11px;font-size:15px;}
.hint{margin-top:18px;padding:12px 14px;background:#f7f9fc;border-radius:8px;font-size:12.5px;color:var(--ink2);line-height:1.9;}

/* ---------- 布局 ---------- */
.shell{display:flex;min-height:100vh;}
.side{width:212px;flex:0 0 212px;background:#0d2b45;color:#c9d6e3;padding:20px 0;display:flex;flex-direction:column;}
.side .brand{padding:0 20px 18px;font-size:15px;font-weight:700;color:#fff;border-bottom:1px solid rgba(255,255,255,.09);margin-bottom:12px;}
.side .brand small{display:block;font-weight:400;font-size:11.5px;color:#7f97ad;margin-top:3px;}
.side nav a{display:block;padding:10px 20px;color:#c9d6e3;font-size:13.5px;border-left:3px solid transparent;}
.side nav a:hover{background:rgba(255,255,255,.05);color:#fff;}
.side nav a.on{background:rgba(255,255,255,.09);color:#fff;border-left-color:#4b9fe0;}
.side .me{margin-top:auto;padding:14px 20px 0;border-top:1px solid rgba(255,255,255,.09);font-size:12.5px;color:#8fa6ba;}
.side .me b{display:block;color:#fff;font-size:13.5px;margin-bottom:2px;}
.side .me a{color:#8fa6ba;text-decoration:underline;font-size:12px;}
.main{flex:1;min-width:0;}
.topbar{background:#fff;border-bottom:1px solid var(--line);padding:14px 26px;display:flex;align-items:center;gap:12px;}
.topbar h2{margin:0;font-size:16px;font-weight:700;}
.topbar .grow{flex:1;}
.content{padding:22px 26px 60px;max-width:1180px;}

/* ---------- 课程卡 ---------- */
.course-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px;}
.course-card{background:#fff;border-radius:var(--r);box-shadow:0 1px 3px rgba(16,24,40,.06);padding:18px 20px;display:flex;flex-direction:column;}
.course-card h4{margin:0 0 6px;font-size:15px;}
.course-card .intro{color:var(--ink3);font-size:12.5px;margin:0 0 14px;min-height:34px;}
.course-card .foot{margin-top:auto;}
.bar{height:6px;border-radius:3px;background:#edf1f6;overflow:hidden;}
.bar > i{display:block;height:100%;background:var(--blue);border-radius:3px;transition:width .3s;}
.bar.done > i{background:var(--green);}

/* ---------- 学习页 ---------- */
.learn{display:grid;grid-template-columns:1fr 300px;gap:18px;align-items:start;}
.player-card{background:#0f1620;border-radius:12px;overflow:hidden;}
.player-stage{position:relative;background:#000;aspect-ratio:16/9;display:flex;align-items:center;justify-content:center;}
.player-stage video{width:100%;height:100%;display:block;background:#000;}
.player-bar{background:#141c27;padding:10px 14px 12px;}
.player-bar .line{position:relative;height:20px;display:flex;align-items:center;cursor:pointer;touch-action:none;}
.player-bar .track{position:relative;height:6px;width:100%;background:#2a3646;border-radius:3px;overflow:hidden;}
.player-bar .track .seen{position:absolute;left:0;top:0;height:100%;background:#4b9fe0;}
.player-bar .track .seen.front{background:#2f6f3f;}
.player-bar .track .locked{position:absolute;top:0;height:100%;background:repeating-linear-gradient(90deg,#2a3646,#2a3646 5px,#232f3d 5px,#232f3d 10px);}
.player-bar .knob{position:absolute;top:50%;width:13px;height:13px;border-radius:50%;background:#fff;transform:translate(-50%,-50%);box-shadow:0 1px 4px rgba(0,0,0,.5);pointer-events:none;}
.player-bar .times{display:flex;justify-content:space-between;color:#9fb0c2;font-size:12px;margin-top:6px;font-variant-numeric:tabular-nums;}
.player-actions{display:flex;align-items:center;gap:12px;margin-top:8px;}
.pbtn{background:#22303f;border:none;color:#dce6f0;border-radius:8px;padding:7px 15px;font-size:13.5px;}
.pbtn:hover{background:#2c3d50;}
.locknote{margin-top:8px;font-size:12.5px;color:#e8b46a;display:flex;align-items:center;gap:6px;}
.locknote.ok{color:#6fce90;}
.lesson-list{background:#fff;border-radius:var(--r);box-shadow:0 1px 3px rgba(16,24,40,.06);overflow:hidden;}
.lesson-list .hd{padding:14px 18px;border-bottom:1px solid var(--line);font-weight:700;font-size:14px;}
.lesson-item{padding:12px 18px;border-bottom:1px solid var(--line);cursor:pointer;display:flex;gap:10px;align-items:flex-start;}
.lesson-item:last-child{border-bottom:none;}
.lesson-item:hover{background:#f8fafc;}
.lesson-item.on{background:var(--blue-l);}
.lesson-item .idx{width:22px;height:22px;flex:0 0 22px;border-radius:50%;background:#eef1f5;color:var(--ink2);font-size:11.5px;display:flex;align-items:center;justify-content:center;margin-top:1px;}
.lesson-item.on .idx{background:var(--blue);color:#fff;}
.lesson-item.done .idx{background:var(--green);color:#fff;}
.lesson-item .nm{font-size:13.5px;flex:1;min-width:0;}
.lesson-item .sub{font-size:11.5px;color:var(--ink3);margin-top:2px;}
.doc-view{background:#fff;border-radius:12px;padding:0;overflow:hidden;}
.doc-view iframe{width:100%;height:70vh;border:none;display:block;}
.doc-view .ph{padding:50px 24px;text-align:center;color:var(--ink3);}

/* ---------- 考试 ---------- */
.q{background:#fff;border-radius:var(--r);padding:18px 20px;margin-bottom:14px;box-shadow:0 1px 3px rgba(16,24,40,.06);}
.q .stem{font-weight:600;margin-bottom:12px;}
.q .opt{display:flex;gap:10px;align-items:flex-start;padding:9px 12px;border:1px solid var(--line);border-radius:8px;margin-bottom:8px;cursor:pointer;}
.q .opt:hover{background:#f8fafc;}
.q .opt.sel{border-color:var(--blue);background:var(--blue-l);}
.q .opt input{margin-top:3px;}
.q .opt.right{border-color:#9dd6b6;background:var(--green-l);}
.q .opt.wrong{border-color:#e9b3b3;background:var(--red-l);}
.score-big{font-size:46px;font-weight:700;line-height:1.1;}

/* ---------- 弹层 ---------- */
.toast{position:fixed;left:50%;bottom:34px;transform:translateX(-50%);background:rgba(24,32,44,.94);color:#fff;padding:11px 20px;border-radius:9px;font-size:13.5px;z-index:99;opacity:0;transition:opacity .25s;pointer-events:none;max-width:80vw;}
.toast.on{opacity:1;}
.modal{position:fixed;inset:0;background:rgba(16,24,40,.45);display:flex;align-items:center;justify-content:center;padding:24px;z-index:60;}
.modal .box{background:#fff;border-radius:12px;width:100%;max-width:640px;max-height:88vh;overflow:auto;padding:24px 26px;}
.modal .box h3{margin:0 0 18px;font-size:16px;}
.modal.wide .box{max-width:880px;}

@media (max-width:900px){
  .shell{flex-direction:column;}
  .side{width:100%;flex:none;padding:14px 0;}
  .side .brand{padding-bottom:12px;margin-bottom:8px;}
  .side nav{display:flex;overflow-x:auto;}
  .side nav a{white-space:nowrap;border-left:none;border-bottom:3px solid transparent;padding:9px 14px;}
  .side nav a.on{border-left:none;border-bottom-color:#4b9fe0;}
  .side .me{display:none;}
  .content{padding:16px 14px 60px;}
  .topbar{padding:12px 14px;}
  .learn{grid-template-columns:1fr;}
  .player-actions{flex-wrap:wrap;}
}