/* 实战英语口语 · 会员站原型 */
:root{
  --accent:#1A73E8; --accent-d:#0C447C; --accent-l:#E8F0FE;
  --bg:#f1f5f9; --card:#ffffff; --line:#e2e8f0; --line2:#cbd5e1;
  --tx:#0f172a; --tx2:#475569; --tx3:#94a3b8;
  --ok:#188038; --ok-l:#E6F4EA; --warn:#d97706; --warn-l:#FEF3E2;
  --bad:#c5221f; --bad-l:#FCE8E6; --purple:#7c3aed; --purple-l:#faf5ff;
  --r:10px; --shadow:0 1px 3px rgba(15,23,42,.08);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{background:var(--bg);color:var(--tx);font:14px/1.6 -apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Segoe UI",sans-serif;-webkit-font-smoothing:antialiased}
a{color:var(--accent);text-decoration:none}
button{font-family:inherit}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}

/* ===== 登录页 ===== */
.login-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px;
  background:linear-gradient(135deg,#eef4ff 0%,#f8fafc 55%,#fdf6ec 100%)}
.login-box{width:min(920px,100%);background:var(--card);border-radius:16px;box-shadow:0 12px 40px rgba(15,23,42,.10);display:grid;grid-template-columns:1.15fr .85fr;overflow:hidden}
.login-left{padding:44px 40px;background:var(--accent-d);color:#fff}
.login-left .lg-brand{font-size:13px;letter-spacing:2px;opacity:.85}
.login-left h1{font-size:26px;font-weight:700;margin:10px 0 6px}
.login-left .sub{font-size:13px;opacity:.85;margin-bottom:26px}
.login-left ul{list-style:none;margin:0;padding:0}
.login-left li{font-size:13.5px;padding:9px 0;border-bottom:1px solid rgba(255,255,255,.14);display:flex;gap:10px;align-items:flex-start}
.login-left li b{font-weight:600}
.login-left .ico{flex:none;width:22px;height:22px;border-radius:6px;background:rgba(255,255,255,.16);display:inline-flex;align-items:center;justify-content:center;font-size:12px}
.login-right{padding:44px 40px}
.login-right h2{font-size:19px;margin:0 0 4px}
.login-right .tip{font-size:12.5px;color:var(--tx2);margin:0 0 22px}
.fld{margin-bottom:14px}
.fld label{display:block;font-size:12.5px;color:var(--tx2);margin-bottom:6px}
.fld input{width:100%;padding:11px 12px;border:1px solid var(--line2);border-radius:8px;font-size:15px;outline:none;background:#fff}
.fld input:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(26,115,232,.14)}
.code-row{display:flex;gap:8px}
.code-row input{flex:1}
.code-row button{flex:none;padding:0 14px;border:1px solid var(--line2);background:#f8fafc;border-radius:8px;font-size:12.5px;color:var(--tx2);cursor:pointer}
.code-row button:hover{border-color:var(--accent);color:var(--accent)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border:none;border-radius:8px;padding:11px 18px;font-size:14px;font-weight:600;cursor:pointer;transition:.15s}
.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover{background:#1557b0}
.btn-ghost{background:#fff;border:1px solid var(--line2);color:var(--tx2)}.btn-ghost:hover{border-color:var(--accent);color:var(--accent)}
.btn-block{width:100%}
.demo-chip{margin-top:16px;padding:10px 12px;background:var(--purple-l);border:1px dashed #c4b5fd;border-radius:8px;font-size:12.5px;color:var(--purple);cursor:pointer}
.demo-chip:hover{background:#f3eefe}
.err{color:var(--bad);font-size:12.5px;min-height:18px;margin-top:8px}

/* ===== 主框架 ===== */
.topbar{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:14px;padding:0 18px;height:54px}
.brand{font-size:15px;font-weight:700;display:flex;align-items:center;gap:8px}
.brand .logo{width:26px;height:26px;border-radius:7px;background:var(--accent);color:#fff;display:inline-flex;align-items:center;justify-content:center;font-size:13px;font-weight:700}
.brand small{font-size:11px;color:var(--tx3);font-weight:400;margin-left:2px}
.top-search{flex:1;max-width:420px;position:relative}
.top-search input{width:100%;padding:8px 12px 8px 32px;border:1px solid var(--line);border-radius:8px;font-size:13px;background:#f8fafc;outline:none}
.top-search input:focus{background:#fff;border-color:var(--accent)}
.top-search .mag{position:absolute;left:10px;top:50%;transform:translateY(-50%);color:var(--tx3);font-size:13px}
.top-right{margin-left:auto;display:flex;align-items:center;gap:10px}
.user-chip{display:flex;align-items:center;gap:8px;padding:5px 10px;border-radius:999px;background:#f1f5f9;font-size:12.5px}
.user-chip .ava{width:24px;height:24px;border-radius:50%;background:var(--accent);color:#fff;display:inline-flex;align-items:center;justify-content:center;font-size:11px;font-weight:700}
.link-btn{background:none;border:none;color:var(--tx2);font-size:12.5px;cursor:pointer;padding:4px 6px}
.link-btn:hover{color:var(--accent)}
.layout{display:grid;grid-template-columns:216px 1fr;gap:0;min-height:calc(100vh - 54px)}

/* ===== 侧栏 ===== */
.side{background:#fff;border-right:1px solid var(--line);padding:16px 12px;position:sticky;top:54px;height:calc(100vh - 54px);overflow:auto}
.side h4{font-size:11.5px;color:var(--tx3);margin:14px 8px 8px;letter-spacing:1px;font-weight:600}
.side h4:first-child{margin-top:0}
.ser-item{display:flex;align-items:center;gap:8px;width:100%;padding:7px 9px;border:none;background:none;border-radius:8px;font-size:13px;color:var(--tx2);cursor:pointer;text-align:left}
.ser-item:hover{background:#f1f5f9;color:var(--tx)}
.ser-item.on{background:var(--accent-l);color:var(--accent-d);font-weight:600}
.ser-item .cnt{margin-left:auto;font-size:11px;color:var(--tx3)}
.ser-item.on .cnt{color:var(--accent)}
.prog-mini{margin:6px 8px 2px;font-size:11.5px;color:var(--tx3)}
.prog-bar{height:6px;background:#eef2f7;border-radius:99px;overflow:hidden;margin:6px 8px 0}
.prog-bar i{display:block;height:100%;background:var(--ok);border-radius:99px}
.console{margin:14px 8px 4px;padding:10px;border:1px dashed var(--line2);border-radius:8px;background:#fafbfc}
.console .t{font-size:11.5px;color:var(--tx3);margin-bottom:8px}
.console button{display:block;width:100%;margin-bottom:6px;padding:6px 8px;font-size:12px;border:1px solid var(--line2);background:#fff;border-radius:6px;color:var(--tx2);cursor:pointer}
.console button:hover{border-color:var(--accent);color:var(--accent)}
.console button:last-child{margin-bottom:0}

/* ===== 目录 ===== */
.main{padding:20px 22px 40px;min-width:0}
.view-head{display:flex;align-items:baseline;gap:12px;margin-bottom:16px;flex-wrap:wrap}
.view-head h2{font-size:19px;margin:0}
.view-head .desc{font-size:12.5px;color:var(--tx2)}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(212px,1fr));gap:12px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:13px 14px;cursor:pointer;box-shadow:var(--shadow);transition:.15s;position:relative;display:flex;flex-direction:column;gap:6px;min-height:118px}
.card:hover{border-color:#b5d4f4;transform:translateY(-1px);box-shadow:0 4px 14px rgba(15,23,42,.10)}
.card .cid{font-size:11px;color:var(--tx3);font-family:Consolas,monospace;letter-spacing:.5px}
.card .nm{font-size:14px;font-weight:600;line-height:1.45}
.card .ft{margin-top:auto;display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.badge{display:inline-flex;align-items:center;gap:4px;font-size:11px;padding:2px 8px;border-radius:999px;font-weight:600}
.b-ok{background:var(--ok-l);color:var(--ok)}
.b-warn{background:var(--warn-l);color:var(--warn)}
.b-bad{background:var(--bad-l);color:var(--bad)}
.b-lock{background:#f1f5f9;color:var(--tx3)}
.b-ab{background:var(--bad-l);color:var(--bad)}
.b-mute{background:#f8fafc;color:var(--tx3);font-weight:400}
.card.locked{background:#fbfcfe;border-style:dashed}
.card.locked .nm{color:var(--tx2)}
.dot{width:6px;height:6px;border-radius:50%;background:var(--ok);display:inline-block}
.empty{padding:60px 20px;text-align:center;color:var(--tx3);font-size:13px}

/* ===== 课程页 ===== */
.course-head{display:flex;align-items:center;gap:10px;margin-bottom:14px;flex-wrap:wrap}
.course-head h2{font-size:19px;margin:0}
.course-grid{display:grid;grid-template-columns:minmax(340px,42%) 1fr;gap:16px;align-items:start}
.pane{background:var(--card);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow);overflow:hidden}
.pane .ph{padding:11px 14px;border-bottom:1px solid var(--line);font-size:13px;font-weight:600;display:flex;align-items:center;gap:8px}
.pane .ph .tag{font-size:11px;color:var(--tx3);font-weight:400}
.video-box{aspect-ratio:16/9;background:#0f172a;position:relative;display:flex;align-items:center;justify-content:center;color:#cbd5e1;flex-direction:column;gap:10px}
.video-box .play{width:52px;height:52px;border-radius:50%;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.3);color:#fff;font-size:19px;display:flex;align-items:center;justify-content:center;cursor:pointer}
.video-box .play:hover{background:var(--accent);border-color:var(--accent)}
.video-box .vt{font-size:12.5px}
.video-box .vs{font-size:11px;color:#64748b}
.video-meta{padding:12px 14px;border-bottom:1px solid var(--line);font-size:12.5px;color:var(--tx2);display:grid;grid-template-columns:1fr 1fr;gap:6px 14px}
.video-meta b{color:var(--tx);font-weight:600}
/* 自定义视频源：嵌入播放器 / 去平台观看按钮 / 登录提示 */
.vd-frame{width:100%;height:240px;border:0;display:block;background:#000}
.vd-open{width:100%;aspect-ratio:16/9;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;
  background:radial-gradient(circle at 50% 40%,#1e293b,#0f172a)}
.vd-btn{background:var(--accent);color:#fff;border-radius:8px;padding:9px 18px;font-size:13px;font-weight:600;text-decoration:none}
.vd-btn:hover{filter:brightness(1.08)}
.vd-sub{font-size:12px;color:#94a3b8;max-width:80%;text-align:center}
.vd-tip{margin:8px 14px 0;padding:8px 10px;border-radius:8px;background:#FEF3E2;border:1px solid #fde68a;color:#92400e;font-size:11.5px;line-height:1.6}
.chapters{padding:10px 14px 14px}
.chapters .ct{font-size:12px;color:var(--tx3);margin-bottom:8px}
.chapter{display:flex;gap:9px;padding:7px 0;border-bottom:1px dashed var(--line);font-size:13px;color:var(--tx2)}
.chapter:last-child{border-bottom:none}
.chapter .no{flex:none;width:20px;height:20px;border-radius:50%;background:#eef2f7;color:var(--tx3);font-size:11px;display:flex;align-items:center;justify-content:center;font-weight:600}
.chapter.done .no{background:var(--ok);color:#fff}
.chapter .dur{margin-left:auto;font-size:11.5px;color:var(--tx3);font-family:Consolas,monospace}
.ops{padding:12px 14px;display:flex;gap:8px;flex-wrap:wrap}
.ops .btn{padding:8px 13px;font-size:12.5px}
.tabs{display:flex;gap:2px;padding:8px 10px 0;border-bottom:1px solid var(--line);flex-wrap:wrap}
.tab{padding:8px 13px;border:none;background:none;font-size:13px;color:var(--tx2);cursor:pointer;border-bottom:2px solid transparent;margin-bottom:-1px}
.tab:hover{color:var(--tx)}
.tab.on{color:var(--accent);border-bottom-color:var(--accent);font-weight:600}
.frame-wrap{position:relative;background:#fff}
.frame-wrap iframe{display:block;width:100%;height:calc(100vh - 220px);min-height:520px;border:none}
.paywall{padding:34px 28px;text-align:center}
.paywall .big{font-size:15px;font-weight:600;margin-bottom:6px}
.paywall .p{font-size:13px;color:var(--tx2);max-width:460px;margin:0 auto 18px;line-height:1.8}
.price{font-size:30px;font-weight:700;color:var(--accent);margin:6px 0 2px}
.price small{font-size:12px;color:var(--tx3);font-weight:400}
.paywall .btn{margin-top:12px}
.me-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:14px}
.kv{display:flex;justify-content:space-between;font-size:13px;padding:8px 0;border-bottom:1px dashed var(--line)}
.kv:last-child{border:none}
.kv .k{color:var(--tx2)}
.kv .v{font-weight:600;text-align:right}
.stat-row{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:16px}
.stat{flex:1;min-width:130px;background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:13px 15px;box-shadow:var(--shadow)}
.stat .n{font-size:22px;font-weight:700;color:var(--accent-d)}
.stat .l{font-size:12px;color:var(--tx2);margin-top:2px}
.toast{position:fixed;left:50%;bottom:26px;transform:translateX(-50%);background:#0f172a;color:#fff;padding:10px 18px;border-radius:8px;font-size:13px;z-index:200;opacity:0;transition:.25s;pointer-events:none;box-shadow:0 8px 24px rgba(15,23,42,.3)}
.toast.show{opacity:1}

/* ===== 响应式 ===== */
@media (max-width:1080px){ .course-grid{grid-template-columns:1fr} .frame-wrap iframe{height:70vh} }
@media (max-width:860px){
  .layout{grid-template-columns:1fr}
  .side{position:static;height:auto;display:flex;overflow-x:auto;padding:10px;gap:4px;border-right:none;border-bottom:1px solid var(--line)}
  .side .ser-list{display:flex;gap:4px}
  .side h4,.console,.prog-mini,.prog-bar{display:none}
  .ser-item{white-space:nowrap}
  .login-box{grid-template-columns:1fr}
  .login-left{padding:28px}
}