:root{
  --brand:#0b3d91;
  --brand-2:#1866d6;
  --ok:#12a150;
  --danger:#d92d20;
  --bg:#f4f6fb;
  --card:#ffffff;
  --text:#1b2432;
  --muted:#6b7484;
  --line:#e3e7ef;
  --radius:14px;
  --shadow:0 2px 10px rgba(16,32,64,.06);
}
*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Segoe UI",Roboto,
    "Helvetica Neue","Noto Sans",Arial,sans-serif;
  background:var(--bg);color:var(--text);font-size:14px;line-height:1.5;
}

/* ---------- 顶栏 ---------- */
.topbar{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:14px 28px;background:linear-gradient(120deg,var(--brand),var(--brand-2));
  color:#fff;box-shadow:0 2px 14px rgba(11,61,145,.25);
  position:sticky;top:0;z-index:50;
}
.brand{display:flex;align-items:center;gap:14px;min-width:0;}
.logo{
  width:44px;height:44px;border-radius:12px;flex:0 0 auto;
  background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.35);
  display:flex;align-items:center;justify-content:center;
  font-weight:800;letter-spacing:.5px;font-size:16px;
}
.brand-text{min-width:0;}
.brand-text h1{margin:0;font-size:16px;font-weight:700;line-height:1.25;}
.brand-text p{margin:1px 0 0;font-size:12px;opacity:.82;line-height:1.3;}
.top-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;}

/* ---------- 按钮 ---------- */
.btn{
  border:none;border-radius:10px;padding:9px 16px;font-size:13px;font-weight:600;
  cursor:pointer;display:inline-flex;align-items:center;gap:6px;
  transition:.15s ease;font-family:inherit;
}
.btn.primary{background:#fff;color:var(--brand);box-shadow:0 1px 4px rgba(0,0,0,.12);}
.btn.primary:hover{transform:translateY(-1px);box-shadow:0 4px 12px rgba(0,0,0,.18);}
.btn.ghost{background:rgba(255,255,255,.14);color:#fff;border:1px solid rgba(255,255,255,.4);}
.btn.ghost:hover{background:rgba(255,255,255,.24);}
.btn.small{padding:6px 12px;font-size:12px;}
.btn.danger{background:var(--danger);color:#fff;}
.btn.ico-only{padding:7px 10px;}
.ico{font-size:15px;line-height:1;}

/* 卡片内的浅色按钮 */
.card .btn.ghost{background:#f2f5fb;color:#3a465c;border:1px solid var(--line);}
.card .btn.ghost:hover{background:#e8eefb;}

/* ---------- 统计 ---------- */
.stats{
  display:grid;grid-template-columns:repeat(5,1fr);gap:14px;
  padding:20px 28px 4px;max-width:1400px;margin:0 auto;
}
.stat{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:14px 16px;box-shadow:var(--shadow);cursor:pointer;transition:.15s;
  border-top:3px solid var(--brand);
}
.stat:hover{transform:translateY(-2px);box-shadow:0 8px 20px rgba(16,32,64,.10);}
.stat.active{outline:2px solid var(--brand-2);}
.stat .n{font-size:24px;font-weight:800;line-height:1.1;}
.stat .t{font-size:12px;color:var(--muted);margin-top:4px;}
.stat[data-cat="quality"]{border-top-color:#1866d6;}
.stat[data-cat="operation"]{border-top-color:#12a150;}
.stat[data-cat="cost"]{border-top-color:#e08a00;}
.stat[data-cat="safety"]{border-top-color:#d92d20;}
.stat[data-cat="all"]{border-top-color:#5b6478;}

/* ---------- 筛选 ---------- */
.filters{
  max-width:1400px;margin:16px auto 0;padding:16px 28px;
  display:flex;flex-direction:column;gap:10px;
}
.filter-row{display:flex;gap:10px;flex-wrap:wrap;}
.input{
  font-family:inherit;font-size:13px;color:var(--text);
  border:1px solid var(--line);background:#fff;border-radius:10px;
  padding:9px 12px;outline:none;transition:.15s;min-width:0;
}
.input:focus{border-color:var(--brand-2);box-shadow:0 0 0 3px rgba(24,102,214,.12);}
.filter-row .input[type="search"]{flex:1 1 220px;}
.date-wrap{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--muted);}
.date-wrap .date{padding:8px 10px;}
.filters .btn.ghost{background:#fff;color:#3a465c;border:1px solid var(--line);}
.filters .btn.ghost:hover{background:#eef3fc;}

/* ---------- 列表 ---------- */
main{max-width:1400px;margin:0 auto;padding:8px 28px 60px;}
.list-head{display:flex;align-items:baseline;gap:10px;margin:14px 0 12px;}
.list-head h2{margin:0;font-size:16px;}
.count{font-size:12px;color:var(--muted);}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(330px,1fr));gap:14px;}

.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:16px;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:10px;
  transition:.15s;position:relative;overflow:hidden;
}
.card:hover{box-shadow:0 8px 22px rgba(16,32,64,.10);transform:translateY(-1px);}
.card::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;}
.card[data-cat="quality"]::before{background:#1866d6;}
.card[data-cat="operation"]::before{background:#12a150;}
.card[data-cat="cost"]::before{background:#e08a00;}
.card[data-cat="safety"]::before{background:#d92d20;}

.card-top{display:flex;align-items:center;justify-content:space-between;gap:8px;}
.badge{font-size:11px;font-weight:700;padding:3px 10px;border-radius:20px;color:#fff;}
.badge[data-cat="quality"]{background:#1866d6;}
.badge[data-cat="operation"]{background:#12a150;}
.badge[data-cat="cost"]{background:#e08a00;}
.badge[data-cat="safety"]{background:#d92d20;}
.card .date{font-size:12px;color:var(--muted);}
.card h3{margin:0;font-size:15px;line-height:1.35;word-break:break-word;}
.card .desc{font-size:12.5px;color:var(--muted);margin:0;display:-webkit-box;
  -webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}
.meta{display:flex;flex-wrap:wrap;gap:12px;font-size:12px;color:#4a5468;}
.meta span{display:inline-flex;align-items:center;gap:4px;}
.file-name{font-size:12px;color:var(--muted);word-break:break-all;}
.card-actions{display:flex;gap:8px;margin-top:auto;padding-top:6px;}
.card-actions .btn{flex:0 0 auto;}
.card-actions .dl{background:var(--brand);color:#fff;}
.card-actions .dl:hover{background:var(--brand-2);}

/* ---------- 空态 ---------- */
.empty{text-align:center;padding:70px 20px;color:var(--muted);}
.empty-ico{font-size:40px;margin-bottom:8px;}
.empty-sub{font-size:12.5px;margin-top:6px;}
.empty a{color:var(--brand-2);}

/* ---------- 弹窗 ---------- */
.modal{position:fixed;inset:0;background:rgba(15,23,42,.5);display:flex;
  align-items:center;justify-content:center;padding:20px;z-index:100;}
.modal[hidden]{display:none;}
.modal-box{background:#fff;border-radius:16px;width:100%;max-width:560px;
  max-height:88vh;display:flex;flex-direction:column;box-shadow:0 20px 50px rgba(0,0,0,.3);}
.modal-box.small{max-width:380px;}
.modal-head{display:flex;align-items:center;justify-content:space-between;
  padding:16px 20px;border-bottom:1px solid var(--line);}
.modal-head h3{margin:0;font-size:15px;}
.close{background:none;border:none;font-size:22px;line-height:1;cursor:pointer;color:var(--muted);}
.modal-body{padding:18px 20px;overflow:auto;display:flex;flex-direction:column;gap:12px;}
.modal-foot{display:flex;justify-content:flex-end;gap:10px;padding:14px 20px;
  border-top:1px solid var(--line);}
.modal-foot .btn.ghost{background:#f2f5fb;color:#3a465c;border:1px solid var(--line);}
.field{display:flex;flex-direction:column;gap:5px;font-size:12px;color:var(--muted);}
.field .input{width:100%;}
.two{display:grid;grid-template-columns:1fr 1fr;gap:12px;}
textarea.input{resize:vertical;font-family:inherit;}
.file-line{display:flex;align-items:center;gap:10px;padding-top:4px;border-top:1px dashed var(--line);}
.file-line .file-name{flex:1;}
.del-ask{margin:0;font-size:13px;color:var(--muted);line-height:1.6;}
.del-name{margin:0;font-size:14px;font-weight:600;color:var(--text);word-break:break-word;}

/* ---------- Toast ---------- */
.toast{position:fixed;left:50%;bottom:34px;transform:translateX(-50%);
  background:#111827;color:#fff;padding:11px 20px;border-radius:10px;font-size:13px;
  box-shadow:0 10px 30px rgba(0,0,0,.3);z-index:200;max-width:80vw;}
.toast.err{background:var(--danger);}

/* ---------- 响应式 ---------- */
@media(max-width:900px){
  .stats{grid-template-columns:repeat(2,1fr);}
  .topbar{padding:12px 16px;flex-wrap:wrap;}
  .filters,.stats,main{padding-left:16px;padding-right:16px;}
  .brand-text h1{font-size:15px;}
  .two{grid-template-columns:1fr;}
}