:root{
  --orange:#F97316;
  --orange-dark:#EA580C;
  --orange-soft:#FFF1E3;
  --orange-line:#FBDBB8;
  --bg:#FFFAF4;
  --card:#FFFFFF;
  --text:#3D2B1F;
  --text-sub:#6B5344;
  --muted:#9B8574;
  --line:#F2E4D5;
  --green:#16A34A;
  --green-soft:#E8F7EE;
  --red:#DC2626;
  --red-soft:#FDECEC;
  --amber:#D97706;
  --amber-soft:#FEF4E2;
  --blue:#2563EB;
  --shadow:0 2px 10px rgba(180,120,60,.08);
  --shadow-lg:0 8px 28px rgba(180,120,60,.14);
  --radius:14px;
}

*{box-sizing:border-box;margin:0;padding:0}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
input{font-family:inherit}
a{text-decoration:none;color:inherit}

/* ---------- 顶栏 ---------- */
.topbar{
  background:linear-gradient(135deg,#FB923C 0%,#F97316 45%,#EA580C 100%);
  color:#fff;
  box-shadow:0 2px 12px rgba(234,88,12,.22);
  position:sticky;top:0;z-index:50;
}
.topbar-inner{
  max-width:1180px;margin:0 auto;padding:16px 20px 12px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
}
.brand{display:flex;align-items:center;gap:12px}
.brand-mark{
  width:42px;height:42px;border-radius:12px;background:rgba(255,255,255,.22);
  display:flex;align-items:center;justify-content:center;
  font-weight:800;font-size:15px;letter-spacing:.5px;border:1px solid rgba(255,255,255,.35);
}
.brand-text h1{font-size:19px;font-weight:700;letter-spacing:.3px}
.brand-text p{font-size:12px;opacity:.9;margin-top:2px}

.topbar-right{display:flex;align-items:center;gap:10px}
.user-chip{
  display:flex;align-items:center;gap:8px;
  background:rgba(255,255,255,.18);border:1px solid rgba(255,255,255,.3);
  padding:6px 12px;border-radius:999px;font-size:13px;
}
.avatar{
  width:24px;height:24px;border-radius:50%;background:#fff;color:var(--orange-dark);
  display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;
}
.link-btn{font-size:12px;opacity:.9;text-decoration:underline;padding-left:2px}

.nav{
  max-width:1180px;margin:0 auto;padding:0 20px 10px;
  display:flex;gap:6px;flex-wrap:wrap;
}
.nav-item{
  padding:6px 16px;border-radius:10px;font-size:14px;
  color:rgba(255,255,255,.88);transition:.18s;
}
.nav-item:hover{background:rgba(255,255,255,.16)}
.nav-item.active{background:#fff;color:var(--orange-dark);font-weight:600}

/* ---------- 布局 ---------- */
main{max-width:1180px;margin:0 auto;padding:22px 20px 60px;min-height:60vh}
.footer{
  text-align:center;padding:18px 20px 30px;color:var(--muted);font-size:12px;
  border-top:1px solid var(--line);
}
.footer .dot{margin:0 8px;opacity:.5}

.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:20px;margin-bottom:16px;
}
.card-title{
  font-size:16px;font-weight:700;display:flex;align-items:center;gap:8px;margin-bottom:14px;
}
.card-title .bar{width:4px;height:16px;background:var(--orange);border-radius:2px}

.btn{
  padding:9px 18px;border-radius:10px;font-size:14px;font-weight:600;transition:.18s;
  border:1px solid transparent;
}
.btn-primary{background:var(--orange);color:#fff;box-shadow:0 2px 8px rgba(249,115,22,.3)}
.btn-primary:hover{background:var(--orange-dark);transform:translateY(-1px)}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--text-sub)}
.btn-ghost:hover{border-color:var(--orange-line);color:var(--orange-dark)}
.btn-sm{padding:6px 12px;font-size:13px;border-radius:8px}
.btn:disabled{opacity:.45;cursor:not-allowed;transform:none}

/* ---------- 统计条 ---------- */
.stat-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;margin-bottom:18px}
.stat{
  background:var(--card);border:1px solid var(--line);border-radius:12px;padding:14px 16px;box-shadow:var(--shadow);
}
.stat .num{font-size:26px;font-weight:800;color:var(--orange-dark);line-height:1.2}
.stat .lbl{font-size:12px;color:var(--muted);margin-top:2px}

/* ---------- 阶段 ---------- */
.stage{border-radius:var(--radius);overflow:hidden;margin-bottom:18px;border:1px solid var(--line);background:var(--card);box-shadow:var(--shadow)}
.stage-head{
  padding:14px 18px;display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;
  background:linear-gradient(90deg,var(--orange-soft),#fff);
  border-bottom:1px solid var(--line);
}
.stage-head h2{font-size:16px;font-weight:700;display:flex;align-items:center;gap:10px}
.stage-tag{
  font-size:12px;padding:2px 10px;border-radius:999px;background:var(--orange);color:#fff;font-weight:600;
}
.stage-meta{font-size:12px;color:var(--muted)}
.stage-body{padding:16px 18px}
.mod-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(268px,1fr));gap:12px}

.mod{
  border:1px solid var(--line);border-radius:12px;padding:14px;background:#fff;
  transition:.18s;position:relative;overflow:hidden;
}
.mod:hover{border-color:var(--orange-line);box-shadow:var(--shadow);transform:translateY(-2px)}
.mod.done{background:linear-gradient(180deg,var(--green-soft),#fff 60%);border-color:#BBE7CB}
.mod-top{display:flex;justify-content:space-between;align-items:flex-start;gap:8px}
.mod-id{font-size:11px;color:var(--muted);font-weight:600;letter-spacing:.5px}
.mod-title{font-size:15px;font-weight:700;margin:4px 0 8px;line-height:1.4}
.mod-desc{font-size:12px;color:var(--text-sub);min-height:36px}
.mod-foot{display:flex;align-items:center;justify-content:space-between;margin-top:12px;gap:8px}
.mod-hours{font-size:12px;color:var(--muted)}
.badge{font-size:11px;padding:3px 9px;border-radius:999px;font-weight:600;white-space:nowrap}
.badge-todo{background:#F3EDE7;color:var(--muted)}
.badge-learning{background:var(--amber-soft);color:var(--amber)}
.badge-done{background:var(--green-soft);color:var(--green)}
.badge-pass{background:var(--green-soft);color:var(--green)}
.badge-fail{background:var(--red-soft);color:var(--red)}
.badge-score{background:var(--orange-soft);color:var(--orange-dark)}

/* ---------- 进度条 ---------- */
.progress{height:7px;background:#F3E7DA;border-radius:999px;overflow:hidden}
.progress > i{display:block;height:100%;background:linear-gradient(90deg,#FB923C,#EA580C);border-radius:999px;transition:width .5s}
.progress.green > i{background:linear-gradient(90deg,#4ADE80,#16A34A)}
.progress-label{display:flex;justify-content:space-between;font-size:12px;color:var(--muted);margin-bottom:6px}

/* ---------- 模块详情 ---------- */
.detail-head{
  background:linear-gradient(135deg,#FB923C,#EA580C);color:#fff;border-radius:var(--radius);
  padding:22px;margin-bottom:16px;box-shadow:var(--shadow-lg);
}
.detail-head h2{font-size:22px;font-weight:800;margin-bottom:6px}
.detail-head .sub{font-size:13px;opacity:.92}
.detail-head .chips{display:flex;gap:8px;margin-top:12px;flex-wrap:wrap}
.chip{background:rgba(255,255,255,.2);border:1px solid rgba(255,255,255,.3);padding:4px 12px;border-radius:999px;font-size:12px}

.sec{margin-bottom:18px}
.sec h3{font-size:15px;font-weight:700;margin-bottom:10px;display:flex;align-items:center;gap:8px}
.sec h3::before{content:"";width:4px;height:14px;background:var(--orange);border-radius:2px}
.sec ul{list-style:none}
.sec li{padding:7px 0 7px 22px;position:relative;font-size:14px;border-bottom:1px dashed var(--line);color:var(--text-sub)}
.sec li:last-child{border-bottom:none}
.sec li::before{content:"";position:absolute;left:6px;top:15px;width:6px;height:6px;border-radius:50%;background:var(--orange-line)}

.kp-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:10px}
.kp{
  background:var(--orange-soft);border:1px solid var(--orange-line);border-radius:10px;padding:10px 12px;
  font-size:13px;line-height:1.6;color:#7C4A21;
}

table{width:100%;border-collapse:collapse;font-size:13px}
th,td{padding:10px 12px;text-align:left;border-bottom:1px solid var(--line)}
th{background:var(--orange-soft);color:#7C4A21;font-weight:700;white-space:nowrap}
td{color:var(--text-sub)}
tr:last-child td{border-bottom:none}

.action-bar{display:flex;gap:10px;flex-wrap:wrap;margin-top:8px}

/* ---------- 考试 ---------- */
.exam-head{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:14px 18px;margin-bottom:14px;
  display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;
  box-shadow:var(--shadow);position:sticky;top:104px;z-index:20;
}
.exam-timer{font-size:20px;font-weight:800;color:var(--orange-dark);font-variant-numeric:tabular-nums}
.exam-timer.warn{color:var(--red)}

.q{border:1px solid var(--line);border-radius:12px;padding:16px;margin-bottom:12px;background:#fff;box-shadow:var(--shadow)}
.q-head{display:flex;gap:10px;align-items:flex-start;margin-bottom:12px}
.q-no{
  flex:0 0 auto;width:26px;height:26px;border-radius:8px;background:var(--orange);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;
}
.q-text{font-size:14.5px;font-weight:600;line-height:1.6;padding-top:2px}
.q-type{font-size:11px;color:var(--muted);border:1px solid var(--line);padding:1px 7px;border-radius:999px;margin-left:6px;font-weight:500}
.opts{display:grid;gap:8px;margin-left:36px}
.opt{
  border:1px solid var(--line);border-radius:10px;padding:10px 14px;font-size:14px;color:var(--text-sub);
  display:flex;gap:10px;align-items:flex-start;transition:.15s;cursor:pointer;background:#fff;
}
.opt:hover{border-color:var(--orange-line);background:#FFFCF8}
.opt.sel{border-color:var(--orange);background:var(--orange-soft);color:#7C4A21;font-weight:600}
.opt-key{
  flex:0 0 auto;width:22px;height:22px;border-radius:6px;background:#F5EDE4;color:var(--muted);
  display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;margin-top:1px;
}
.opt.sel .opt-key{background:var(--orange);color:#fff}
.opt.right{border-color:#86E0A3;background:var(--green-soft);color:#14622F}
.opt.wrong{border-color:#F3A9A9;background:var(--red-soft);color:#9B1C1C}
.opt.right .opt-key,.opt.wrong .opt-key{color:#fff}
.opt.right .opt-key{background:var(--green)}
.opt.wrong .opt-key{background:var(--red)}
.locked .opt{cursor:default}
.q-explain{
  margin:12px 0 0 36px;font-size:13px;background:var(--orange-soft);border-left:3px solid var(--orange);
  padding:9px 12px;border-radius:0 8px 8px 0;color:#7C4A21;line-height:1.6;
}

/* ---------- 成绩 ---------- */
.score-card{
  text-align:center;padding:30px 20px;border-radius:var(--radius);
  background:linear-gradient(135deg,#FB923C,#EA580C);color:#fff;box-shadow:var(--shadow-lg);margin-bottom:16px;
}
.score-num{font-size:60px;font-weight:800;line-height:1;letter-spacing:-2px}
.score-num small{font-size:20px;font-weight:600;opacity:.9}
.score-verdict{font-size:17px;font-weight:700;margin-top:10px}
.score-meta{font-size:13px;opacity:.92;margin-top:6px}
.score-actions{display:flex;gap:10px;justify-content:center;margin-top:18px;flex-wrap:wrap}
.score-card .btn-primary{background:#fff;color:var(--orange-dark)}
.score-card .btn-ghost{background:rgba(255,255,255,.18);border-color:rgba(255,255,255,.45);color:#fff}

.ring{width:120px;height:120px;margin:0 auto 6px;position:relative}
.ring svg{transform:rotate(-90deg)}
.ring .ring-text{
  position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;
}
.ring .ring-num{font-size:26px;font-weight:800;color:var(--orange-dark)}
.ring .ring-lbl{font-size:11px;color:var(--muted)}

/* ---------- 列表 / 表格页 ---------- */
.timeline{list-style:none;position:relative;padding-left:20px}
.timeline::before{content:"";position:absolute;left:5px;top:6px;bottom:6px;width:2px;background:var(--orange-line)}
.timeline li{position:relative;padding:8px 0;font-size:13.5px;color:var(--text-sub)}
.timeline li::before{content:"";position:absolute;left:-19px;top:14px;width:10px;height:10px;border-radius:50%;background:#fff;border:2px solid var(--orange)}
.timeline .t-time{font-size:12px;color:var(--muted);margin-left:8px}

.res-item{
  border:1px solid var(--line);border-radius:10px;padding:12px 14px;margin-bottom:10px;background:#fff;
  display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;
}
.res-name{font-size:14.5px;font-weight:600}
.res-note{font-size:12.5px;color:var(--muted);margin-top:3px;line-height:1.5}
.res-type{font-size:11px;padding:2px 9px;border-radius:999px;background:var(--orange-soft);color:var(--orange-dark);font-weight:600}
.res-link{font-size:13px;color:var(--blue);font-weight:600}
.res-path{font-size:11.5px;color:var(--muted);margin-top:5px;padding-top:5px;border-top:1px dashed var(--line)}
.q-src{font-size:11px;color:var(--muted);border:1px solid var(--line);padding:1px 7px;border-radius:999px;margin-left:6px;font-weight:400}

.warn-list{list-style:none}
.warn-list li{
  padding:10px 12px;border-radius:10px;background:var(--red-soft);color:#9B1C1C;font-size:13px;margin-bottom:8px;
  border-left:3px solid var(--red);
}

.empty{text-align:center;padding:50px 20px;color:var(--muted);font-size:14px}

/* ---------- 章节手风琴 ---------- */
.acc{border:1px solid var(--line);border-radius:10px;margin-bottom:8px;background:#fff;overflow:hidden}
.acc-head{
  padding:12px 14px;font-size:14px;font-weight:600;color:var(--text-sub);cursor:pointer;
  display:flex;align-items:center;gap:8px;transition:.15s;user-select:none;
}
.acc-head:hover{background:#FFFCF8;color:var(--orange-dark)}
.acc-arrow{flex:0 0 auto;font-size:12px;color:var(--orange);transition:transform .2s}
.acc.open .acc-arrow{transform:rotate(90deg)}
.acc-body{
  display:none;border-top:1px dashed var(--line);padding:14px 16px;background:#FFFCF8;
  font-size:13.5px;color:var(--text-sub);line-height:1.8;
}
.acc.open .acc-body{display:block}
.acc-body p{margin-bottom:10px}
.acc-body .md-strong{color:var(--text);font-size:14px;margin:14px 0 8px}
.acc-body .md-strong:first-child{margin-top:0}
.acc-body .md-h3{
  font-size:14px;font-weight:700;color:#7C4A21;margin:14px 0 8px;padding-left:10px;border-left:3px solid var(--orange);
}
.acc-body .md-ul,.acc-body .md-ol{margin:0 0 10px 20px}
.acc-body .md-ul li,.acc-body .md-ol li{margin-bottom:5px}
.md-table{overflow-x:auto;margin:10px 0}
.md-table table{border:1px solid var(--line);border-radius:8px;overflow:hidden}
.md-table th{background:var(--orange-soft);color:#7C4A21;font-weight:600}
.md-table td{border-top:1px solid var(--line)}
.acc-body strong{color:#7C4A21}

/* ---------- 全局水印 ---------- */
#watermark{
  position:fixed;top:0;left:0;right:0;bottom:0;z-index:9998;
  pointer-events:none;background-repeat:repeat;
}

/* ---------- 表单控件 ---------- */
.sel{
  margin-left:6px;padding:6px 10px;border:1px solid var(--line);border-radius:8px;
  font-size:13.5px;background:#FFFCF8;color:var(--text);outline:none;max-width:260px;
}
.sel:focus{border-color:var(--orange)}
.ginput{
  width:100px;padding:6px 10px;border:1px solid var(--line);border-radius:8px;
  font-size:14px;text-align:center;outline:none;background:#FFFCF8;
}
.ginput:focus{border-color:var(--orange);background:#fff}

/* ---------- 弹窗 ---------- */
.modal-mask{
  position:fixed;inset:0;background:rgba(61,43,31,.45);display:none;align-items:center;justify-content:center;z-index:200;
  padding:20px;
}
.modal-mask.show{display:flex}
.modal{background:#fff;border-radius:16px;padding:24px;width:100%;max-width:420px;box-shadow:var(--shadow-lg)}
.modal h3{font-size:18px;font-weight:700;margin-bottom:6px}
.modal-sub{font-size:13px;color:var(--muted);margin-bottom:14px;line-height:1.6}
.modal input{
  width:100%;padding:11px 14px;border:1px solid var(--line);border-radius:10px;font-size:15px;outline:none;
  background:#FFFCF8;
}
.modal input:focus{border-color:var(--orange);background:#fff}
.modal-tips{margin-top:10px;font-size:12.5px;color:var(--muted);min-height:18px}
.modal-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:20px}

/* ---------- 响应式 ---------- */
@media (max-width:640px){
  .brand-text h1{font-size:16px}
  .brand-text p{display:none}
  main{padding:16px 14px 50px}
  .opts{margin-left:0}
  .q-explain{margin-left:0}
  .exam-head{top:96px}
  .stat-row{grid-template-columns:repeat(2,1fr)}
  .mod-grid{grid-template-columns:1fr}
  table{font-size:12px}
  th,td{padding:8px 8px}
}