:root{
  --bg:#0f1115;
  --panel:#171a21;
  --panel2:#1e222b;
  --line:#2a2f3a;
  --text:#e8eaed;
  --muted:#8b93a1;
  --accent:#5b8cff;
  --ok:#39c07a;
  --warn:#e8a33d;
  --danger:#e0575b;
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
[hidden]{display:none !important}
html,body{margin:0;padding:0}
body{
  background:var(--bg);color:var(--text);
  font:15px/1.6 system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
  min-height:100vh;
  padding-bottom:env(safe-area-inset-bottom);
}

/* 顶栏 */
.topbar{
  position:sticky;top:0;z-index:20;
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 18px;
  background:rgba(15,17,21,.86);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.brand{font-weight:600;letter-spacing:.5px}
.linkbtn{
  background:none;border:0;color:var(--accent);
  font-size:14px;padding:4px 2px;cursor:pointer;
}

main{max-width:560px;margin:0 auto;padding:18px}
.view{animation:fade .18s ease}
@keyframes fade{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}

/* 登录 */
.hero{text-align:center;padding:38px 0 26px}
.hero-title{font-size:26px;font-weight:700;letter-spacing:1px}
.hero-sub{color:var(--muted);font-size:13px;margin-top:8px}

.card{
  background:var(--panel);border:1px solid var(--line);
  border-radius:14px;padding:18px;
}
.field{display:block;margin-bottom:16px}
.field>span{display:block;font-size:13px;color:var(--muted);margin-bottom:8px}
.row{display:flex;gap:10px}
.row input{flex:1}

input{
  width:100%;height:46px;padding:0 14px;
  background:var(--panel2);border:1px solid var(--line);
  border-radius:10px;color:var(--text);font-size:16px;outline:none;
}
input:focus{border-color:var(--accent)}
input::placeholder{color:#5a616e}

.btn{
  height:46px;padding:0 18px;border-radius:10px;border:1px solid transparent;
  font-size:15px;font-weight:500;cursor:pointer;
}
.btn.primary{width:100%;background:var(--accent);color:#fff}
.btn.primary:disabled{opacity:.5;cursor:not-allowed}
.btn.ghost{background:var(--panel2);border-color:var(--line);color:var(--text);white-space:nowrap}
.btn.small{height:32px;padding:0 12px;font-size:13px;border-radius:8px}

.hint{font-size:13px;color:var(--muted);margin:6px 0 14px;min-height:20px}
.hint.err{color:var(--danger)}
.hint.ok{color:var(--ok)}

/* 会员条 */
.memberbar{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:14px 16px;margin-bottom:16px;
  background:linear-gradient(135deg,#1d2436,#171a21);
  border:1px solid var(--line);border-radius:14px;
}
.memberbar .t{font-size:14px}
.memberbar .s{font-size:12px;color:var(--muted);margin-top:2px}
.pill{
  font-size:12px;padding:5px 11px;border-radius:999px;white-space:nowrap;
  background:rgba(57,192,122,.14);color:var(--ok);border:1px solid rgba(57,192,122,.3);
}
.pill.off{background:rgba(224,87,91,.14);color:var(--danger);border-color:rgba(224,87,91,.3)}

/* 课程列表 */
.list{display:flex;flex-direction:column;gap:12px}
.course{
  display:flex;gap:14px;align-items:center;
  padding:12px;background:var(--panel);border:1px solid var(--line);
  border-radius:14px;cursor:pointer;transition:border-color .15s,transform .1s;
}
.course:active{transform:scale(.995)}
.course:hover{border-color:#3a4152}
.cover{
  width:112px;height:74px;border-radius:10px;flex:none;
  background:linear-gradient(135deg,#2b3550,#1a1f2b);
  display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden;
}
.cover::after{
  content:"";width:0;height:0;
  border-left:14px solid rgba(255,255,255,.85);
  border-top:9px solid transparent;border-bottom:9px solid transparent;
  margin-left:4px;
}
.course .meta{min-width:0}
.course .meta h3{margin:0 0 4px;font-size:15px;font-weight:600;line-height:1.35}
.course .meta p{margin:0;font-size:12px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.course .meta .dur{font-size:12px;color:#6e7686;margin-top:4px}

.foot{text-align:center;color:#5a616e;font-size:12px;margin:26px 0 10px;line-height:1.8}

/* 播放器 */
.playerwrap{
  position:relative;background:#000;border-radius:14px;overflow:hidden;
  aspect-ratio:9/16;max-height:72vh;margin:0 auto;
  display:flex;align-items:center;justify-content:center;
}
.playerwrap video{width:100%;height:100%;object-fit:contain;background:#000}
.wm{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}
.lockhint{
  position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  background:rgba(0,0,0,.82);color:#fff;font-size:14px;text-align:center;padding:20px;
  backdrop-filter:blur(2px);
}

.watchbar{
  display:flex;align-items:center;justify-content:space-between;
  margin:14px 0 6px;
}
.quality{display:flex;gap:8px}
.qbtn{
  height:30px;padding:0 12px;border-radius:8px;font-size:13px;
  background:var(--panel2);border:1px solid var(--line);color:var(--muted);cursor:pointer;
}
.qbtn.on{background:rgba(91,140,255,.16);border-color:rgba(91,140,255,.5);color:#a9c2ff}
.watchtitle{font-size:14px;color:var(--muted);margin-bottom:6px}

/* 弹层 */
.sheet{position:fixed;inset:0;background:rgba(0,0,0,.6);display:flex;align-items:flex-end;justify-content:center;z-index:50}
.sheetbox{
  width:100%;max-width:560px;background:var(--panel);
  border-radius:16px 16px 0 0;padding:20px;padding-bottom:calc(20px + env(safe-area-inset-bottom));
  animation:up .2s ease;
}
@keyframes up{from{transform:translateY(20px);opacity:.6}to{transform:none;opacity:1}}
.sheethead{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.dev{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:12px 0;border-bottom:1px solid var(--line);
}
.dev:last-child{border-bottom:0}
.dev .n{font-size:14px}
.dev .d{font-size:12px;color:var(--muted);margin-top:2px}

/* 提示 */
.toast{
  position:fixed;left:50%;bottom:30px;transform:translateX(-50%);
  background:#2a2f3a;color:#fff;padding:10px 18px;border-radius:10px;
  font-size:14px;z-index:99;max-width:80vw;text-align:center;
  box-shadow:0 8px 24px rgba(0,0,0,.4);
}

@media (max-width:400px){
  main{padding:14px}
  .cover{width:96px;height:64px}
}

/* ================= 播放器控件 ================= */

.playerwrap{cursor:pointer}
.playerwrap.full{
  position:fixed;inset:0;z-index:999;
  max-height:none;aspect-ratio:auto;border-radius:0;
  background:#000;
}
.playerwrap.full video{height:100%;width:100%}

.ctrl{
  position:absolute;inset:0;z-index:3;
  opacity:0;transition:opacity .22s ease;
  display:flex;align-items:center;justify-content:center;
  pointer-events:none;            /* 关键：点击画面要能穿透到 video */
}
.ctrl.show{opacity:1}
.ctrl::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(to top,rgba(0,0,0,.78) 0%,rgba(0,0,0,.25) 22%,transparent 42%);
  pointer-events:none;
}
.ctrl.show .bar,.ctrl.show .bigplay{pointer-events:auto}

/* 中央大播放键 */
.bigplay{
  position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
  width:64px;height:64px;border-radius:50%;border:0;
  background:rgba(0,0,0,.45);backdrop-filter:blur(6px);
  color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;
  transition:transform .15s,background .15s;
}
.bigplay:hover{background:rgba(0,0,0,.62);transform:translate(-50%,-50%) scale(1.06)}
.bigplay svg{width:28px;height:28px;fill:#fff;margin-left:3px}
.bigplay[hidden]{display:none}

/* 底部控制条 */
.bar{
  position:absolute;left:0;right:0;bottom:0;
  padding:0 12px 10px;
  display:flex;flex-direction:column;gap:8px;
}

/* 进度条 */
.seek{
  position:relative;height:16px;display:flex;align-items:center;
  cursor:pointer;touch-action:none;
}
.seek::before{
  content:"";position:absolute;left:0;right:0;height:4px;border-radius:2px;
  background:rgba(255,255,255,.24);transition:height .12s;
}
.seek:hover::before{height:6px}
.seek-buf,.seek-play{
  position:absolute;left:0;height:4px;border-radius:2px;transition:height .12s;
}
.seek:hover .seek-buf,.seek:hover .seek-play{height:6px}
.seek-buf{background:rgba(255,255,255,.38);width:0}
.seek-play{background:var(--accent);width:0}
.seek-knob{
  position:absolute;width:12px;height:12px;border-radius:50%;background:#fff;
  transform:translateX(-50%);left:0;opacity:0;transition:opacity .12s;
  box-shadow:0 1px 4px rgba(0,0,0,.5);pointer-events:none;
}
.seek:hover .seek-knob,.seek.dragging .seek-knob{opacity:1}

.row{
  display:flex;align-items:center;gap:6px;
  color:#fff;font-size:12px;
}

.ico{
  width:32px;height:32px;flex:none;border:0;border-radius:8px;
  background:transparent;color:#fff;cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  transition:background .15s;
}
.ico:hover{background:rgba(255,255,255,.14)}
.ico svg{width:20px;height:20px;fill:currentColor}

.time{
  font-variant-numeric:tabular-nums;
  color:rgba(255,255,255,.92);
  font-size:12px;letter-spacing:.3px;white-space:nowrap;
  padding:0 2px;
}

.spacer{flex:1}

.txt{
  height:26px;padding:0 9px;border:1px solid rgba(255,255,255,.28);
  border-radius:7px;background:rgba(0,0,0,.25);color:#fff;
  font-size:12px;cursor:pointer;white-space:nowrap;font-variant-numeric:tabular-nums;
}
.txt:hover{background:rgba(255,255,255,.16)}

.quality{display:flex;gap:4px}
.quality .qbtn{
  height:26px;padding:0 7px;border-radius:7px;font-size:12px;
  background:rgba(0,0,0,.25);border:1px solid rgba(255,255,255,.28);
  color:rgba(255,255,255,.8);cursor:pointer;
  white-space:nowrap;line-height:1;
}
.quality .qbtn.on{
  background:rgba(91,140,255,.30);border-color:rgba(91,140,255,.85);color:#fff;
}

.playerwrap{container-type:inline-size}
.row{position:relative}

/* 音量：竖向滑块，悬停/点击弹出 */
.volwrap{position:relative;display:flex;align-items:center}
.volpop{
  position:absolute;bottom:100%;left:50%;transform:translateX(-50%);
  margin-bottom:6px;width:34px;height:126px;
  background:rgba(18,20,26,.95);
  border:1px solid rgba(255,255,255,.14);
  border-radius:10px;
  display:flex;align-items:center;justify-content:center;
  backdrop-filter:blur(8px);
  box-shadow:0 10px 26px rgba(0,0,0,.5);
}
.voltrack{
  position:relative;width:4px;height:100px;border-radius:2px;
  background:rgba(255,255,255,.24);cursor:pointer;touch-action:none;
}
.volpop::after{
  content:"";position:absolute;left:-6px;right:-6px;bottom:-12px;height:14px;
}
.volfill{position:absolute;left:0;right:0;bottom:0;height:100%;border-radius:2px;background:var(--accent)}
.volknob{
  position:absolute;left:50%;width:12px;height:12px;border-radius:50%;
  background:#fff;transform:translate(-50%,50%);
  box-shadow:0 1px 4px rgba(0,0,0,.55);pointer-events:none;
}

/* 弹出选单：倍速 / 清晰度，竖向排列 */
.pop{
  position:absolute;bottom:100%;margin-bottom:8px;
  min-width:100px;padding:5px;
  background:rgba(18,20,26,.96);
  border:1px solid rgba(255,255,255,.14);
  border-radius:10px;
  display:flex;flex-direction:column;gap:2px;
  box-shadow:0 10px 26px rgba(0,0,0,.5);
  backdrop-filter:blur(8px);
  z-index:6;
}
.popitem{
  height:32px;padding:0 12px;border:0;border-radius:7px;
  background:transparent;color:rgba(255,255,255,.86);
  font-size:13px;text-align:left;cursor:pointer;white-space:nowrap;
}
.popitem:hover{background:rgba(255,255,255,.12)}
.popitem.on{background:rgba(91,140,255,.30);color:#fff}

/* 两个下拉按钮加个小三角（用边框画，不依赖字体） */
#btnSpeed::after,#btnQuality::after{
  content:"";display:inline-block;margin-left:6px;
  border-left:4px solid transparent;border-right:4px solid transparent;
  border-top:4px solid currentColor;vertical-align:middle;opacity:.8;
}

@media (max-width:420px){
  .vol{display:none}
  .bar{padding:0 8px 8px}
  .time{font-size:11px}
  .quality .qbtn{padding:0 6px;font-size:11px}
  .bigplay{width:54px;height:54px}
}

/* 全屏时隐藏页面滚动 */
body.noscroll{overflow:hidden}

/* 课程卡片上的观看进度 */
.course .dur .prog{color:#6f8fd6}
.course .dur .done{color:var(--ok)}

/* 页脚备案信息 */
.sitefooter{
  text-align:center;padding:18px 12px calc(18px + env(safe-area-inset-bottom));
  color:#5a616e;font-size:12px;line-height:1.9;
}
.sitefooter a{color:#5a616e;text-decoration:none}
.sitefooter a:hover{color:var(--muted);text-decoration:underline}
.sitefooter .sep{margin:0 6px;opacity:.5}