/* 班费管理系统 · 样式（移动端自适应，无第三方依赖） */
:root{
  --brand:#2f6fed; --brand-dark:#1f4fb8; --bg:#f4f6fb; --card:#fff;
  --text:#1f2733; --muted:#6b7686; --line:#e5e9f2;
  --income:#159c6b; --expense:#e05252; --warn:#d9822b;
  --radius:12px; --shadow:0 1px 3px rgba(16,24,40,.06),0 8px 24px rgba(16,24,40,.05);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{background:var(--bg);color:var(--text);font:15px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:1120px;margin:0 auto;padding:0 16px}

/* 顶栏 */
.topbar{background:linear-gradient(135deg,#2f6fed,#5b8ef7);color:#fff;box-shadow:var(--shadow);position:sticky;top:0;z-index:50}
.topbar .inner{display:flex;align-items:center;gap:16px;height:60px}
.logo{font-weight:700;font-size:17px;color:#fff;white-space:nowrap}
.logo span{opacity:.75;font-weight:400;font-size:13px;margin-left:6px}
.nav{display:flex;gap:2px;flex:1;overflow-x:auto;scrollbar-width:none}
.nav::-webkit-scrollbar{display:none}
.nav a{color:rgba(255,255,255,.88);padding:8px 12px;border-radius:8px;white-space:nowrap;font-size:14px}
.nav a:hover,.nav a.active{background:rgba(255,255,255,.18);color:#fff;text-decoration:none}
.userbox{display:flex;align-items:center;gap:10px;white-space:nowrap;font-size:14px}
.userbox .btn{background:rgba(255,255,255,.2);color:#fff;border:0}

/* 主体 */
main{padding:24px 0 56px}
.page-head{display:flex;align-items:flex-end;justify-content:space-between;gap:12px;margin-bottom:16px;flex-wrap:wrap}
.page-head h1{margin:0;font-size:22px;letter-spacing:.2px}
.page-head .sub{color:var(--muted);font-size:13px;margin-top:4px}

/* 卡片与网格 */
.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px;margin-bottom:16px}
.card h2{margin:0 0 14px;font-size:16px}
.grid{display:grid;gap:16px}
.grid.cols-3{grid-template-columns:repeat(3,1fr)}
.grid.cols-4{grid-template-columns:repeat(4,1fr)}
.grid.cols-2{grid-template-columns:repeat(2,1fr)}
@media(max-width:860px){.grid.cols-3,.grid.cols-4,.grid.cols-2{grid-template-columns:1fr}}

/* 指标卡 */
.stat{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px;border-left:4px solid var(--brand)}
.stat .label{color:var(--muted);font-size:13px;margin-bottom:6px}
.stat .value{font-size:26px;font-weight:700;font-variant-numeric:tabular-nums}
.stat .hint{color:var(--muted);font-size:12px;margin-top:4px}
.stat.income{border-left-color:var(--income)}
.stat.income .value{color:var(--income)}
.stat.expense{border-left-color:var(--expense)}
.stat.expense .value{color:var(--expense)}
.stat.balance{border-left-color:var(--brand)}
.stat.balance .value{color:var(--brand)}

/* 表格 */
.table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch}
table{width:100%;border-collapse:collapse;font-size:14px}
th,td{padding:10px 12px;text-align:left;border-bottom:1px solid var(--line);vertical-align:middle}
th{background:#f8fafd;color:var(--muted);font-weight:600;font-size:13px;white-space:nowrap}
tbody tr:hover{background:#fafcff}
td.num,th.num{text-align:right;font-variant-numeric:tabular-nums;white-space:nowrap}
.amount-income{color:var(--income);font-weight:600}
.amount-expense{color:var(--expense);font-weight:600}

/* 徽标 */
.badge{display:inline-block;padding:2px 8px;border-radius:999px;font-size:12px;background:#eef2fa;color:var(--muted)}
.badge.income{background:#e6f7f0;color:var(--income)}
.badge.expense{background:#fdecec;color:var(--expense)}
.badge.warn{background:#fdf1e3;color:var(--warn)}
.badge.ok{background:#e6f7f0;color:var(--income)}
.badge.danger{background:#fdecec;color:var(--expense)}
.badge.info{background:#eaf1ff;color:var(--brand)}

/* 表单 */
.form-row{margin-bottom:14px}
.form-row label{display:block;font-size:13px;color:var(--muted);margin-bottom:6px}
input[type=text],input[type=password],input[type=number],input[type=date],input[type=datetime-local],input[type=file],select,textarea{
  width:100%;padding:9px 11px;border:1px solid var(--line);border-radius:9px;background:#fff;color:var(--text);font-size:14px;font-family:inherit}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(47,111,237,.12)}
textarea{min-height:110px;resize:vertical}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 16px}
@media(max-width:640px){.form-grid{grid-template-columns:1fr}}
.help{color:var(--muted);font-size:12px;margin-top:4px}

/* 按钮 */
.btn{display:inline-flex;align-items:center;gap:6px;padding:9px 16px;border-radius:9px;border:1px solid transparent;background:var(--brand);color:#fff;font-size:14px;cursor:pointer;font-family:inherit;line-height:1.2}
.btn:hover{background:var(--brand-dark);text-decoration:none;color:#fff}
.btn.ghost{background:#fff;color:var(--text);border-color:var(--line)}
.btn.ghost:hover{background:#f6f8fc}
.btn.danger{background:var(--expense)}
.btn.danger:hover{background:#c63f3f}
.btn.sm{padding:5px 10px;font-size:13px;border-radius:7px}
.btn[disabled]{opacity:.5;pointer-events:none}

/* 提示 */
.alert{padding:11px 14px;border-radius:10px;margin-bottom:14px;font-size:14px}
.alert.error{background:#fdecec;color:#a52a2a;border:1px solid #f6c6c6}
.alert.success{background:#e6f7f0;color:#0f6b4a;border:1px solid #bfe8d7}
.alert.info{background:#eaf1ff;color:#20489e;border:1px solid #c6d8fb}

/* 分页 */
.pager{display:flex;align-items:center;gap:6px;flex-wrap:wrap;margin-top:14px}
.pager .page{padding:6px 11px;border:1px solid var(--line);border-radius:8px;background:#fff;font-size:13px;color:var(--text)}
.pager .page.active{background:var(--brand);border-color:var(--brand);color:#fff}
.pager .page.disabled{color:#b6bec9;pointer-events:none}
.pager-info{color:var(--muted);font-size:12px;margin-left:auto}

/* 筛选条 */
.filters{display:flex;gap:10px;flex-wrap:wrap;align-items:flex-end}
.filters .f{min-width:130px;flex:0 1 auto}
.filters .f label{display:block;font-size:12px;color:var(--muted);margin-bottom:4px}
.filters select,.filters input{padding:7px 10px;font-size:13px}

/* 空态 */
.empty{padding:36px 12px;text-align:center;color:var(--muted)}
.empty .big{font-size:34px;opacity:.35;margin-bottom:8px}

/* 登录页 */
.auth-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#2f6fed,#7aa7ff 60%,#b9d0ff);padding:20px}
.auth-card{width:100%;max-width:380px;background:#fff;border-radius:16px;box-shadow:0 20px 50px rgba(20,40,90,.25);padding:30px 26px}
.auth-card h1{margin:0 0 4px;font-size:20px;text-align:center}
.auth-card .sub{text-align:center;color:var(--muted);font-size:13px;margin-bottom:22px}
.auth-card .btn{width:100%;justify-content:center;padding:11px}
.auth-foot{text-align:center;margin-top:16px;font-size:13px}

/* 图表 */
.chart-box{position:relative;width:100%;height:280px}
.chart-box canvas{width:100%;height:100%;display:block}
.legend{display:flex;gap:14px;flex-wrap:wrap;font-size:13px;color:var(--muted);margin-top:10px}
.legend i{display:inline-block;width:10px;height:10px;border-radius:3px;margin-right:6px}

/* 详情定义列表 */
.dl{display:grid;grid-template-columns:110px 1fr;gap:10px 14px;font-size:14px}
.dl dt{color:var(--muted)}
.dl dd{margin:0}

/* 凭证缩略 */
.thumbs{display:flex;gap:12px;flex-wrap:wrap;margin-top:8px}
.thumb{width:120px;border:1px solid var(--line);border-radius:10px;overflow:hidden;background:#fafbfe}
.thumb img{width:100%;height:90px;object-fit:cover;display:block}
.thumb .cap{padding:6px 8px;font-size:12px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.thumb .pdf{height:90px;display:flex;align-items:center;justify-content:center;color:var(--expense);font-weight:700;font-size:22px}

/* 提示条 */
.notice{background:#fff8e6;border:1px solid #f3dfa8;color:#8a6116;padding:10px 14px;border-radius:10px;font-size:13px;margin-bottom:16px}

/* 底部 */
footer{padding:20px 0;text-align:center;color:var(--muted);font-size:12px}
@media(max-width:640px){
  .topbar .inner{height:auto;padding:10px 0;flex-wrap:wrap}
  .nav{order:3;width:100%}
  .stat .value{font-size:22px}
}