/* ===== 爱玩牛 · 计算机 AI 学习工作台 前端样式 ===== */
:root{
  --blue:#002FA7;      /* 克莱因蓝 - 主色 */
  --blue-2:#1b54c9;
  --orange:#FF770F;    /* 爱马仕橙 - 强调 */
  --red:#D82C16;
  --ink:#182033;
  --bg:#F4F6FA;
  --blue-soft:#EEF3FF;
  --orange-soft:#FFF7EF;
  --text:#1f2937;
  --text-light:#5b6b7f;
  --border:#e7ebf2;
  --radius:16px;
  --shadow:0 1px 2px rgba(16,24,40,.05),0 10px 30px rgba(16,24,40,.08);
  --shadow-lg:0 18px 60px rgba(24,32,51,.28);
  --sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{font-family:var(--sans);color:var(--text);background:var(--bg);
  -webkit-font-smoothing:antialiased;line-height:1.55}
.hidden{display:none !important}
a{color:var(--blue);text-decoration:none}
button{font-family:inherit;cursor:pointer}

/* ===== 登录页 ===== */
.login-page{display:grid;grid-template-columns:1.05fr .95fr;min-height:100vh}
.login-intro{position:relative;overflow:hidden;background:
    radial-gradient(900px 480px at 88% -8%,rgba(0,47,167,.42),transparent 60%),
    radial-gradient(700px 460px at 4% 6%,rgba(255,119,15,.20),transparent 55%),
    linear-gradient(160deg,#101a2b,#182033);
  color:#eef3ff;padding:54px 56px;display:flex;flex-direction:column;justify-content:space-between}
.brand-mark{display:flex;align-items:center;gap:12px;font-weight:800;letter-spacing:.5px}
.brand-mark .logo{width:40px;height:40px;border-radius:11px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--blue),var(--orange));color:#fff;font-weight:900;font-size:19px;
  box-shadow:0 8px 20px rgba(0,47,167,.4)}
.brand-mark .name{font-size:18px}
.brand-mark .name small{display:block;font-size:11px;font-weight:600;letter-spacing:2px;color:#9fb2d6;margin-top:2px}
.intro-copy{max-width:460px}
.eyebrow{font-size:12.5px;letter-spacing:2px;color:#ffb27a;font-weight:700;margin:0 0 14px}
.intro-copy h1{font-size:40px;line-height:1.2;margin:0 0 18px;font-weight:900;letter-spacing:-.5px}
.intro-copy p{font-size:15.5px;color:#c4d2ea;margin:0}
.login-foot{font-size:13px;color:#8fa3c6;letter-spacing:.5px;
  border-top:1px solid rgba(255,255,255,.12);padding-top:18px;margin-top:24px}
.login-foot b{color:#ffd2ad;font-weight:700}

.login-panel{display:grid;place-items:center;padding:40px}
.login-card{width:100%;max-width:380px;background:#fff;border:1px solid var(--border);
  border-radius:var(--radius);padding:34px 32px;box-shadow:var(--shadow)}
.card-kicker{font-size:11.5px;letter-spacing:2px;color:var(--orange);font-weight:800;margin-bottom:10px}
.login-card h2{font-size:23px;margin:0 0 8px;color:var(--ink)}
.login-card>p{font-size:14px;color:var(--text-light);margin:0 0 22px}
.login-card label{display:block;font-size:13px;font-weight:700;color:var(--ink);margin-bottom:14px}
.login-card input{width:100%;margin-top:7px;padding:12px 14px;font-size:15px;
  border:1px solid var(--border);border-radius:11px;background:#fbfcfe;color:var(--text);
  outline:none;transition:.15s}
.login-card input:focus{border-color:var(--blue);box-shadow:0 0 0 3px var(--blue-soft);background:#fff}
.primary{background:linear-gradient(120deg,var(--orange),#ff8c33);color:#fff;border:none;
  border-radius:11px;padding:13px 18px;font-size:15px;font-weight:800;letter-spacing:.5px;
  transition:.18s;box-shadow:0 8px 20px rgba(255,119,15,.32)}
.primary:hover{transform:translateY(-1px);box-shadow:0 12px 26px rgba(255,119,15,.4)}
.primary.wide{width:100%;margin-top:4px}
.form-error{color:var(--red);font-size:13px;font-weight:600;margin-top:12px;min-height:18px}
.demo-hint{margin-top:18px;padding:11px 13px;background:var(--orange-soft);border:1px solid #ffd9bd;
  border-radius:10px;font-size:12.5px;color:#9a4a12}
.demo-hint strong{color:var(--orange)}

/* ===== 工作台 ===== */
.app-shell{display:grid;grid-template-columns:248px 1fr;min-height:100vh}
.sidebar{background:var(--ink);color:#cfe;display:flex;flex-direction:column;padding:20px 16px}
.side-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:26px}
.brand-mark.small .logo{width:34px;height:34px;font-size:16px}
.brand-mark.small .name{font-size:15px;color:#eef3ff}
.brand-mark.small .name small{color:#8497ba}
.side-section-label{font-size:11px;letter-spacing:2px;color:#7e92b6;font-weight:700;
  padding:0 8px;margin-bottom:10px}
.nav-item{display:flex;align-items:center;gap:11px;width:100%;text-align:left;border:none;
  background:transparent;color:#bcccea;padding:11px 12px;border-radius:11px;font-size:14.5px;
  font-weight:600;margin-bottom:4px;transition:.15s}
.nav-item .nav-icon{width:20px;text-align:center;opacity:.85}
.nav-item:hover{background:rgba(255,255,255,.06);color:#fff}
.nav-item.active{background:linear-gradient(120deg,var(--blue),var(--blue-2));color:#fff;
  box-shadow:0 8px 18px rgba(0,47,167,.4)}
.side-bottom{margin-top:auto;padding-top:18px;border-top:1px solid rgba(255,255,255,.1)}
.side-note{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.08);
  border-radius:11px;padding:12px 13px;font-size:12.5px;color:#b9c8e6;margin-bottom:12px}
.side-note .note-spark{color:var(--orange);margin-right:5px}
.side-note strong{display:block;color:#fff;margin-bottom:4px;font-size:13px}
.profile{display:flex;align-items:center;gap:11px;width:100%;background:rgba(255,255,255,.04);
  border:1px solid rgba(255,255,255,.1);border-radius:12px;padding:9px 11px;color:#eef3ff}
.profile:hover{background:rgba(255,255,255,.09)}
.avatar,.top-avatar{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--orange),#ff8c33);color:#fff;font-weight:800;flex:none}
.profile strong{display:block;font-size:13.5px}
.profile small{display:block;font-size:11.5px;color:#9aa9c9}
.profile-arrow{margin-left:auto;color:#9aa9c9}

.main-wrap{display:flex;flex-direction:column;min-width:0}
.topbar{display:flex;align-items:center;gap:14px;padding:16px 28px;border-bottom:1px solid var(--border);
  background:rgba(255,255,255,.7);backdrop-filter:blur(8px)}
.breadcrumb{font-size:14px;color:var(--text-light);font-weight:600}
.breadcrumb span{margin:0 7px;color:#c2ccd9}
.breadcrumb b{color:var(--ink)}
.top-right{margin-left:auto;display:flex;align-items:center;gap:12px}
.term{font-size:12.5px;color:var(--text-light);background:#fff;border:1px solid var(--border);
  padding:6px 12px;border-radius:999px;font-weight:600}
.top-avatar{background:linear-gradient(135deg,var(--blue),var(--blue-2))}
.icon-button{background:transparent;border:none;font-size:22px;color:var(--ink);display:none}

main#content{padding:28px;max-width:1100px;width:100%}
.view-head{margin-bottom:22px}
.view-head h2{font-size:26px;margin:0 0 6px;color:var(--ink)}
.view-head p{margin:0;color:var(--text-light);font-size:14.5px}

.grid{display:grid;gap:18px}
.g4{grid-template-columns:repeat(4,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}
.card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}
.stat .k{font-size:13px;color:var(--text-light);font-weight:600}
.stat .v{font-size:30px;font-weight:900;color:var(--ink);margin:6px 0 2px;letter-spacing:-.5px}
.stat .v small{font-size:14px;color:var(--text-light);font-weight:700;margin-left:4px}
.stat .bar{height:7px;border-radius:99px;background:var(--bg);margin-top:12px;overflow:hidden}
.stat .bar i{display:block;height:100%;border-radius:99px;background:linear-gradient(90deg,var(--blue),var(--orange))}
.card h3{font-size:16px;margin:0 0 12px;color:var(--ink)}
.card .lead{color:var(--text-light);font-size:14px}
.pill{display:inline-block;font-size:11.5px;font-weight:700;padding:3px 10px;border-radius:999px;
  background:var(--blue-soft);color:var(--blue);margin-right:6px;margin-bottom:6px}
.pill.o{background:var(--orange-soft);color:#b95310}
.pill.r{background:#fdeceb;color:var(--red)}

/* ===== 聊天 ===== */
.chat-wrap{display:grid;grid-template-rows:1fr auto;height:calc(100vh - 150px);
  background:#fff;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.chat-head{display:flex;align-items:center;gap:12px;padding:14px 18px;border-bottom:1px solid var(--border)}
.chat-head .title{font-weight:800;color:var(--ink);font-size:15px}
.chat-head select{margin-left:auto;padding:8px 10px;border-radius:10px;border:1px solid var(--border);
  background:#fbfcfe;font-size:13px;color:var(--ink);font-family:inherit}
.chat-head .new-btn{background:var(--blue-soft);color:var(--blue);border:none;border-radius:10px;
  padding:8px 12px;font-size:13px;font-weight:700}
.chat-body{padding:18px;overflow-y:auto;display:flex;flex-direction:column;gap:14px}
.msg{display:flex;gap:12px;max-width:86%}
.msg .bubble{padding:11px 14px;border-radius:14px;font-size:14.5px;white-space:pre-wrap;word-break:break-word}
.msg.user{align-self:flex-end;flex-direction:row-reverse}
.msg.user .bubble{background:linear-gradient(120deg,var(--blue),var(--blue-2));color:#fff;border-bottom-right-radius:4px}
.msg.bot .bubble{background:var(--bg);color:var(--ink);border-bottom-left-radius:4px}
.msg .ava{width:30px;height:30px;border-radius:50%;flex:none;display:grid;place-items:center;font-weight:800;font-size:13px;color:#fff}
.msg.user .ava{background:linear-gradient(135deg,var(--orange),#ff8c33)}
.msg.bot .ava{background:linear-gradient(135deg,var(--blue),var(--blue-2))}
.chat-input{display:flex;gap:10px;padding:14px 16px;border-top:1px solid var(--border)}
.chat-input textarea{flex:1;resize:none;height:46px;max-height:140px;padding:12px 14px;font-size:14.5px;
  border:1px solid var(--border);border-radius:12px;background:#fbfcfe;outline:none;font-family:inherit;color:var(--text)}
.chat-input textarea:focus{border-color:var(--blue);box-shadow:0 0 0 3px var(--blue-soft)}
.chat-input button{padding:0 22px;border:none;border-radius:12px;font-weight:800;font-size:15px;color:#fff;
  background:linear-gradient(120deg,var(--orange),#ff8c33);box-shadow:0 8px 20px rgba(255,119,15,.3)}
.chat-input button:disabled{opacity:.55;cursor:not-allowed}

/* ===== 生成面板 ===== */
.gen-card{max-width:760px}
.gen-card textarea{width:100%;min-height:96px;padding:13px 14px;font-size:14.5px;border:1px solid var(--border);
  border-radius:12px;background:#fbfcfe;outline:none;font-family:inherit;color:var(--text);resize:vertical}
.gen-card textarea:focus{border-color:var(--blue);box-shadow:0 0 0 3px var(--blue-soft)}
.gen-actions{display:flex;gap:10px;margin-top:14px;align-items:center}
.btn-soft{background:linear-gradient(120deg,var(--blue),var(--blue-2));color:#fff;border:none;border-radius:11px;
  padding:11px 20px;font-weight:800;font-size:14px;box-shadow:0 8px 18px rgba(0,47,167,.3)}
.btn-soft:disabled{opacity:.55;cursor:not-allowed}
.gen-result{margin-top:18px;padding:14px 16px;border-radius:12px;font-size:14px;line-height:1.6}
.gen-result.ok{background:#eafaf1;border:1px solid #b7e8cb;color:#14692f}
.gen-result.warn{background:var(--orange-soft);border:1px solid #ffd9bd;color:#9a4a12}
.gen-result.err{background:#fdeceb;border:1px solid #f5c4bc;color:#b3261e}
.gen-status{display:flex;gap:10px;flex-wrap:wrap;margin-top:6px}
.gen-status .chip{font-size:12.5px;font-weight:700;padding:5px 12px;border-radius:999px}
.chip.on{background:#eafaf1;color:#14692f}
.chip.off{background:#eef1f6;color:#79859a}
.spin{display:inline-block;width:14px;height:14px;border:2px solid rgba(255,255,255,.5);
  border-top-color:#fff;border-radius:50%;animation:sp .7s linear infinite;vertical-align:-2px;margin-right:6px}
@keyframes sp{to{transform:rotate(360deg)}}

/* ===== 实训内容 ===== */
.training-banner{background:linear-gradient(120deg,var(--blue),var(--blue-2));color:#fff;
  border-radius:var(--radius);padding:20px 24px;margin-bottom:22px;box-shadow:var(--shadow)}
.training-banner h3{color:#fff;margin:0 0 8px;font-size:17px}
.training-banner p{margin:0;color:#dbe6ff;font-size:13.5px;line-height:1.75}
.cat{margin-bottom:26px}
.cat-head{display:flex;align-items:baseline;gap:12px;margin-bottom:14px;flex-wrap:wrap}
.cat-head h3{font-size:19px;margin:0;color:var(--ink)}
.cat-head .cat-sub{font-size:13px;color:var(--text-light)}
.cat-head .cat-tag{margin-left:auto;font-size:12px;font-weight:700;color:var(--blue);
  background:var(--blue-soft);padding:4px 12px;border-radius:999px}
.t-item{display:flex;flex-direction:column;gap:10px;height:100%}
.t-item h4{margin:0;font-size:15.5px;color:var(--ink)}
.t-item p{margin:0;font-size:13.5px;color:var(--text-light);line-height:1.65}
.t-item .t-foot{display:flex;align-items:center;gap:10px;margin-top:auto;padding-top:8px;flex-wrap:wrap}
.t-item .t-foot .meta{display:flex;gap:6px;flex-wrap:wrap}
.t-soon{font-size:12.5px;color:var(--orange);font-weight:700}

.train-progress{background:#fff;border:1px solid var(--border);border-radius:var(--radius);
  padding:16px 20px;margin-bottom:22px;box-shadow:var(--shadow)}
.train-progress .tp-text{font-size:14px;color:var(--text);font-weight:600;margin-bottom:10px}
.train-progress .tp-text b{color:var(--blue);font-size:16px;margin:0 2px}
.train-progress .tp-bar{height:9px;border-radius:99px;background:var(--bg);overflow:hidden}
.train-progress .tp-bar i{display:block;height:100%;border-radius:99px;
  background:linear-gradient(90deg,var(--blue),var(--orange));transition:width .3s}

.t-item-head{display:flex;align-items:center;gap:10px;margin-bottom:2px}
.t-badge{font-size:11.5px;font-weight:800;color:#14692f;background:#eafaf1;
  border:1px solid #b7e8cb;padding:2px 9px;border-radius:999px;white-space:nowrap}
.t-actions{display:flex;gap:8px;flex-wrap:wrap}
.t-progress-mini{font-size:12.5px;color:var(--text-light);font-weight:600;margin-top:2px}
.btn-ghost{background:#fff;color:var(--blue);border:1px solid var(--blue);border-radius:11px;
  padding:10px 16px;font-weight:800;font-size:13.5px;transition:.15s}
.btn-ghost:hover{background:var(--blue-soft)}

.t-lessons{border-top:1px dashed var(--border);margin-top:4px;padding-top:14px}
.t-lessons.hidden{display:none}
.t-item.open .t-lessons{display:block}
.t-goal{background:var(--blue-soft);border-radius:11px;padding:11px 14px;font-size:13.5px;
  color:#1c3a82;line-height:1.7;margin-bottom:12px}
.t-goal b,.t-deli b,.t-aitip b{color:var(--blue);font-weight:800}
.t-lesson{border:1px solid var(--border);border-radius:12px;padding:13px 15px;margin-bottom:12px;background:#fbfcfe}
.t-lesson-title{font-size:14px;font-weight:800;color:var(--ink);margin-bottom:8px}
.t-steps{margin:0;padding-left:0;list-style:none}
.t-step{margin-bottom:7px}
.t-step label{display:flex;gap:9px;align-items:flex-start;font-size:13.5px;color:var(--text);cursor:pointer;line-height:1.55}
.t-step input{margin-top:3px;width:17px;height:17px;accent-color:var(--blue);flex:none;cursor:pointer}
.t-deli{font-size:13px;color:var(--text-light);margin-top:9px;line-height:1.6}
.t-aitip{font-size:13px;color:#7a5a18;background:var(--orange-soft);border:1px solid #ffe2c6;
  border-radius:9px;padding:8px 11px;margin-top:9px;line-height:1.6}

/* ===== AI 提示词工坊 ===== */
.p-item{display:flex;flex-direction:column;gap:10px;height:100%}
.p-head{display:flex;align-items:center;gap:10px}
.p-head h4{margin:0;font-size:15.5px;color:var(--ink)}
.p-scene{font-size:13px;color:var(--text-light);line-height:1.5}
.p-code{background:var(--ink);color:#e7eefc;border-radius:11px;padding:13px 15px;font-size:13px;
  line-height:1.7;white-space:pre-wrap;word-break:break-word;max-height:200px;overflow:auto;margin:0;
  font-family:"SF Mono",Menlo,Consolas,monospace}
.p-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:auto}
.ac-icon{font-size:21px;line-height:1;width:34px;height:34px;flex:none;display:grid;place-items:center;
  background:var(--blue-soft);border-radius:10px}
.ac-tip{font-size:12.5px;color:#7a5a18;background:var(--orange-soft);border:1px solid #ffe2c6;
  border-radius:9px;padding:7px 11px;line-height:1.6}

/* ===== 学习路径 ===== */
.path{display:flex;align-items:stretch;gap:6px;flex-wrap:wrap}
.path-step{flex:1;min-width:150px;text-align:left;background:#fff;border:1px solid var(--border);
  border-radius:12px;padding:12px 14px;display:flex;flex-direction:column;gap:3px;cursor:pointer;transition:.15s}
.path-step:hover{border-color:var(--blue);background:var(--blue-soft);box-shadow:var(--shadow)}
.path-step b{color:var(--blue);font-size:14px}
.path-step span{font-size:12.5px;color:var(--text-light)}
.path-arrow{display:flex;align-items:center;color:var(--text-light);font-size:18px;font-weight:800}

.toast{position:fixed;left:50%;bottom:28px;transform:translateX(-50%);
  background:var(--ink);color:#fff;padding:11px 20px;border-radius:999px;font-size:14px;font-weight:600;
  box-shadow:0 12px 30px rgba(24,32,51,.4);z-index:60}

@media(max-width:880px){
  .login-page{grid-template-columns:1fr}
  .login-intro{min-height:auto;padding:40px 28px}
  .intro-copy h1{font-size:32px}
  .app-shell{grid-template-columns:1fr}
  .sidebar{position:fixed;inset:0 auto 0 0;width:248px;z-index:30;transform:translateX(-100%);transition:.25s}
  .sidebar.open{transform:none}
  .icon-button{display:block}
  .g4,.g3,.g2{grid-template-columns:1fr}
  main#content{padding:18px}
  .chat-wrap{height:calc(100vh - 130px)}
}