:root{
  --bg:#f4f6f9; --card:#ffffff; --ink:#1f2733; --muted:#6b7785; --line:#e3e8ef;
  --brand:#1faa70; --brand-d:#178a5b; --accent:#6d5bf5; --warn:#e8a33d; --bad:#e05656;
  --shadow:0 1px 3px rgba(20,30,50,.08),0 1px 2px rgba(20,30,50,.04);
  --radius:14px;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei","Hiragino Sans",sans-serif;
  background:var(--bg);color:var(--ink);font-size:14px;line-height:1.55;-webkit-text-size-adjust:100%}
button{font-family:inherit;cursor:pointer}
input,select{font-family:inherit;font-size:14px}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}

.app{display:flex;min-height:100vh}

/* ---------- 侧边栏 ---------- */
.sidebar{width:236px;background:#13241d;color:#cfe5da;flex-shrink:0;position:sticky;top:0;height:100vh;
  display:flex;flex-direction:column;padding:18px 0;z-index:40}
.brand{padding:0 20px 16px;font-weight:700;font-size:15.5px;color:#fff;display:flex;gap:10px;align-items:center}
.brand .logo{width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,#1faa70,#3bb6d8);
  display:flex;align-items:center;justify-content:center;font-size:17px;flex-shrink:0;color:#fff}
.brand small{display:block;font-size:10.5px;color:#7fa493;font-weight:400;margin-top:1px}

.sidestats{display:flex;gap:8px;padding:0 16px 16px}
.sidestats .st{flex:1;background:rgba(255,255,255,.06);border-radius:10px;padding:9px 8px;text-align:center}
.sidestats .st b{display:block;font-size:18px;color:#fff;font-weight:700;line-height:1.2}
.sidestats .st span{font-size:10.5px;color:#85a596}

.nav-title{padding:6px 20px;font-size:11px;color:#6f9082;text-transform:uppercase;letter-spacing:.5px;font-weight:700}
.nav{flex:1;overflow:auto;padding-bottom:8px}
.nav::-webkit-scrollbar{width:6px}
.nav::-webkit-scrollbar-thumb{background:rgba(255,255,255,.12);border-radius:3px}
.nav button{width:100%;text-align:left;background:none;border:none;color:#a7c3b7;padding:8px 20px;
  display:flex;align-items:center;gap:8px;font-size:13px;border-left:3px solid transparent;line-height:1.3}
.nav button:hover{background:rgba(255,255,255,.05);color:#fff}
.nav button.active{background:rgba(31,170,112,.20);color:#fff;border-left-color:var(--brand);font-weight:600}
.nav button .nm{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.nav button .n{background:rgba(255,255,255,.12);border-radius:10px;font-size:11px;padding:1px 7px;flex-shrink:0}
.nav button.active .n{background:var(--brand)}
.side-foot{padding:12px 20px 2px;font-size:10px;color:#5f7e70;line-height:1.6;border-top:1px solid rgba(255,255,255,.07);margin-top:6px}

/* ---------- 主区 ---------- */
.main{flex:1;min-width:0;display:flex;flex-direction:column}
.topbar{position:sticky;top:0;z-index:30;background:#eef1f5;
  border-bottom:1px solid var(--line);padding:13px 26px;display:flex;align-items:center;gap:12px}
.tb-title{font-size:17px;font-weight:700}
.topbar .spacer{flex:1}
.tb-sub{font-size:12.5px;color:var(--muted)}
.hamburger{display:none;background:none;border:none;font-size:20px;color:var(--ink);padding:0 2px}

.content{padding:20px 26px 80px;max-width:1180px;width:100%;margin:0 auto}

/* search + filters */
.searchbar{display:flex;gap:10px;align-items:center;margin-bottom:14px;flex-wrap:wrap}
.searchbox{flex:1;min-width:240px;position:relative}
.searchbox input{width:100%;padding:11px 14px 11px 38px;border:1px solid var(--line);border-radius:11px;background:#fff}
.searchbox input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(31,170,112,.13)}
.searchbox .si{position:absolute;left:13px;top:50%;transform:translateY(-50%);color:var(--muted);font-size:13px}
.selwrap{display:flex;align-items:center;gap:6px}
.selwrap select{padding:9px 12px;border:1px solid var(--line);border-radius:10px;background:#fff;color:var(--ink)}
.selwrap select:focus{outline:none;border-color:var(--brand)}

.filters{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:8px;align-items:center}
.flabel{font-size:12px;color:var(--muted);font-weight:600;margin-right:2px}
.filters .sep{width:1px;height:18px;background:var(--line);margin:0 4px}
.chip{border:1.5px solid var(--line);background:#fff;border-radius:20px;padding:6px 13px;font-size:12.5px;font-weight:600;color:#52606e;
  display:inline-flex;gap:6px;align-items:center;transition:.15s}
.chip:hover{border-color:#c4cdd8}
.chip.on{background:var(--brand);border-color:var(--brand);color:#fff}

.btn{border:1px solid var(--line);background:#fff;color:var(--ink);padding:8px 14px;border-radius:9px;font-size:13px;font-weight:600;
  display:inline-flex;align-items:center;gap:6px;transition:.15s}
.btn:hover{border-color:#c4cdd8;background:#fafbfc}
.btn.ghost{background:transparent;border-color:transparent;color:var(--muted)}
.btn.ghost:hover{background:#eef1f5;color:var(--ink)}

.countline{font-size:12.5px;color:var(--muted);margin:6px 0 14px}
.countline b{color:var(--brand);font-weight:700}

/* card grid */
.profgrid{display:grid;gap:13px;grid-template-columns:repeat(auto-fill,minmax(290px,1fr))}
.excard{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:15px 16px;box-shadow:var(--shadow);
  display:flex;flex-direction:column;gap:8px;transition:.15s}
.excard:hover{box-shadow:0 4px 14px rgba(20,30,50,.10);border-color:#d3dbe5;transform:translateY(-1px)}
.ec-head{display:flex;align-items:flex-start;gap:8px}
.ec-uni{font-size:15.5px;font-weight:700;letter-spacing:.2px;flex:1}
.ec-tags{display:flex;gap:5px;flex-wrap:wrap;justify-content:flex-end}
.ec-gs{font-size:12px;color:var(--muted)}
.ec-subject{font-size:14px;font-weight:500;color:#2c3744}
.ec-subject.unknown{color:#9aa4ae;font-weight:400;font-style:italic}
.ec-links{display:flex;gap:8px;flex-wrap:wrap;margin-top:3px}
.ec-links a,.ec-links .em{display:inline-flex;align-items:center;gap:5px;font-size:12px;border:1px solid var(--line);
  border-radius:8px;padding:5px 10px;color:#3a4856;background:#fafbfc;font-weight:600}
.ec-links a:hover{border-color:var(--brand);color:var(--brand);text-decoration:none}
.ec-links .em{color:#8a939d}

/* tags / pills */
.tag{display:inline-flex;align-items:center;gap:4px;padding:2px 9px;border-radius:20px;font-size:11px;font-weight:600;white-space:nowrap}
.tag.year{background:#e2f6ec;color:#157a4f}
.tag.level{background:#e7eefe;color:#2c54c9}
.tag.warn{background:#fcf2e0;color:#a8721c}
.tag.gray{background:#eef1f5;color:#62707f}

.empty{grid-column:1/-1;text-align:center;color:var(--muted);padding:56px 20px}
.empty .big{font-size:34px;margin-bottom:8px;opacity:.5}

mark{background:#fff2a8;color:inherit;padding:0 1px;border-radius:2px}

.scrim{display:none;position:fixed;inset:0;background:rgba(10,18,14,.45);z-index:35}

/* ---------- 响应式 ---------- */
@media(max-width:820px){
  .sidebar{position:fixed;left:0;top:0;transform:translateX(-100%);transition:transform .25s;box-shadow:2px 0 18px rgba(0,0,0,.25)}
  .sidebar.open{transform:none}
  .hamburger{display:block}
  .scrim.show{display:block}
  .content{padding:16px 16px 70px}
  .topbar{padding:12px 16px}
  .profgrid{grid-template-columns:1fr}
}