:root{
  --primary:#2563eb;
  --primary-dark:#1d4ed8;
  --primary-light:#eff6ff;
  --success:#10b981;
  --success-light:#ecfdf5;
  --warning:#f59e0b;
  --warning-light:#fffbeb;
  --danger:#ef4444;
  --danger-light:#fef2f2;
  --text:#1e293b;
  --text-light:#64748b;
  --text-mute:#94a3b8;
  --bg:#f1f5f9;
  --card:#ffffff;
  --border:#e2e8f0;
  --radius:14px;
  --radius-sm:10px;
  --shadow:0 2px 12px rgba(15,23,42,.06);
  --shadow-lg:0 8px 30px rgba(15,23,42,.12);
}
*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent;}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--text);line-height:1.5;font-size:15px;}
a{color:inherit;text-decoration:none;}
img{display:block;max-width:100%;}

/* ===== 移动端外壳（居中手机视图） ===== */
.app-shell{max-width:480px;margin:0 auto;min-height:100vh;background:var(--bg);position:relative;box-shadow:0 0 40px rgba(15,23,42,.08);display:flex;flex-direction:column;}
.app-shell.desktop{min-height:auto;}

/* ===== 顶栏 ===== */
.topbar{position:sticky;top:0;z-index:20;background:var(--primary);color:#fff;padding:14px 16px;display:flex;align-items:center;gap:12px;box-shadow:var(--shadow);}
.topbar.dark{background:#0f172a;}
.topbar h1{font-size:17px;font-weight:600;flex:1;}
.topbar .back{font-size:22px;line-height:1;width:24px;}
.topbar .avatar{width:34px;height:34px;border-radius:50%;background:rgba(255,255,255,.25);display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:600;}
.topbar .right{font-size:13px;opacity:.9;}

/* ===== 内容区 ===== */
.content{flex:1;padding:16px;overflow-y:auto;}
.content.tabs-below{padding-bottom:84px;}
.section-title{font-size:13px;color:var(--text-light);font-weight:600;margin:4px 4px 10px;text-transform:uppercase;letter-spacing:.5px;}

/* ===== 统计卡 ===== */
.stat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-bottom:18px;}
.stat-card{background:var(--card);border-radius:var(--radius);padding:16px;box-shadow:var(--shadow);}
.stat-card .label{font-size:13px;color:var(--text-light);}
.stat-card .value{font-size:26px;font-weight:700;margin-top:4px;color:var(--primary);}
.stat-card .value small{font-size:13px;color:var(--text-mute);font-weight:500;}

/* ===== Tabs（顶部切换） ===== */
.tabs{display:flex;background:var(--card);border-radius:var(--radius);padding:4px;box-shadow:var(--shadow);margin-bottom:16px;}
.tabs button{flex:1;border:none;background:transparent;padding:10px;font-size:15px;font-weight:600;color:var(--text-light);border-radius:var(--radius-sm);cursor:pointer;transition:.2s;}
.tabs button.active{background:var(--primary);color:#fff;}

/* ===== 表单 ===== */
.field{margin-bottom:16px;}
.field label{display:block;font-size:14px;font-weight:600;margin-bottom:6px;color:var(--text);}
.field label .req{color:var(--danger);margin-left:2px;}
.field input,.field select,.field textarea{width:100%;padding:12px 14px;border:1.5px solid var(--border);border-radius:var(--radius-sm);font-size:15px;background:#fff;color:var(--text);transition:.2s;font-family:inherit;}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light);}
.field .hint{font-size:12px;color:var(--text-mute);margin-top:4px;}
.field input[readonly]{background:#f8fafc;color:var(--text-light);}
.upload{border:2px dashed var(--border);border-radius:var(--radius-sm);padding:22px;text-align:center;color:var(--text-light);cursor:pointer;transition:.2s;background:#fafcff;}
.upload:active{border-color:var(--primary);background:var(--primary-light);}
.upload .icon{font-size:30px;margin-bottom:6px;}
.upload.has-img{border-style:solid;padding:8px;}
.upload.has-img img{border-radius:8px;width:100%;}

/* ===== 按钮 ===== */
.btn{display:block;width:100%;padding:14px;border:none;border-radius:var(--radius-sm);font-size:16px;font-weight:600;cursor:pointer;transition:.2s;text-align:center;}
.btn-primary{background:var(--primary);color:#fff;}
.btn-primary:active{background:var(--primary-dark);}
.btn-success{background:var(--success);color:#fff;}
.btn-ghost{background:#fff;color:var(--primary);border:1.5px solid var(--primary);}
.btn-danger{background:var(--danger);color:#fff;}
.btn-sm{padding:8px 14px;font-size:13px;width:auto;display:inline-block;}
.btn:disabled{opacity:.5;cursor:not-allowed;}

/* ===== 卡片 / 列表 ===== */
.card{background:var(--card);border-radius:var(--radius);padding:14px;box-shadow:var(--shadow);margin-bottom:12px;}
.card .row{display:flex;align-items:center;gap:12px;}
.card .row .info{flex:1;min-width:0;}
.card .title{font-weight:600;font-size:15px;}
.card .sub{font-size:13px;color:var(--text-light);margin-top:2px;}
.card .thumb{width:54px;height:54px;border-radius:10px;background:#f1f5f9;object-fit:cover;flex-shrink:0;display:flex;align-items:center;justify-content:center;font-size:24px;}
.list{display:flex;flex-direction:column;gap:12px;}

/* ===== 状态徽章 ===== */
.badge{display:inline-flex;align-items:center;gap:4px;padding:3px 10px;border-radius:999px;font-size:12px;font-weight:600;}
.badge.pending{background:var(--warning-light);color:var(--warning);}
.badge.approved{background:var(--success-light);color:var(--success);}
.badge.rejected{background:var(--danger-light);color:var(--danger);}
.badge.info{background:var(--primary-light);color:var(--primary);}
.dot{width:7px;height:7px;border-radius:50%;background:currentColor;}

/* ===== 底部导航 ===== */
.bottom-nav{position:fixed;bottom:0;left:50%;transform:translateX(-50%);width:100%;max-width:480px;background:#fff;border-top:1px solid var(--border);display:flex;z-index:30;box-shadow:0 -2px 12px rgba(15,23,42,.05);}
.bottom-nav a{flex:1;text-align:center;padding:8px 2px 10px;font-size:11px;color:var(--text-light);}
.bottom-nav a .ic{font-size:20px;display:block;margin-bottom:2px;}
.bottom-nav a.active{color:var(--primary);font-weight:600;}

/* ===== 登录页 ===== */
.login{padding:40px 24px;display:flex;flex-direction:column;justify-content:center;min-height:100vh;max-width:480px;margin:0 auto;}
.login .logo{text-align:center;margin-bottom:30px;}
.login .logo .mark{width:72px;height:72px;border-radius:20px;background:linear-gradient(135deg,var(--primary),#60a5fa);margin:0 auto 14px;display:flex;align-items:center;justify-content:center;font-size:36px;color:#fff;box-shadow:var(--shadow-lg);}
.login .logo h2{font-size:22px;}
.login .logo p{color:var(--text-light);font-size:14px;margin-top:4px;}
.login .field input{padding:14px;}

/* ===== 桌面端布局 ===== */
.desktop-wrap{display:flex;min-height:100vh;max-width:1280px;margin:0 auto;background:#fff;box-shadow:var(--shadow-lg);}
.sidebar{width:230px;background:#0f172a;color:#cbd5e1;flex-shrink:0;display:flex;flex-direction:column;padding:20px 0;}
.sidebar .brand{display:flex;align-items:center;gap:10px;padding:0 20px 18px;color:#fff;font-weight:700;font-size:17px;border-bottom:1px solid #1e293b;margin-bottom:10px;}
.sidebar .brand .mark{width:34px;height:34px;border-radius:9px;background:linear-gradient(135deg,var(--primary),#60a5fa);display:flex;align-items:center;justify-content:center;font-size:18px;}
.sidebar a{padding:12px 20px;color:#cbd5e1;font-size:14px;display:flex;align-items:center;gap:10px;border-left:3px solid transparent;transition:.2s;}
.sidebar a:hover{background:#1e293b;color:#fff;}
.sidebar a.active{background:#1e293b;color:#fff;border-left-color:var(--primary);}
.sidebar .spacer{flex:1;}
.sidebar .user{display:flex;align-items:center;gap:10px;padding:14px 20px;border-top:1px solid #1e293b;font-size:13px;}
.main{flex:1;overflow:auto;background:var(--bg);}
.main .topbar-desktop{background:#fff;padding:18px 28px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;z-index:10;}
.main .topbar-desktop h2{font-size:20px;font-weight:700;}
.main .topbar-desktop .who{font-size:13px;color:var(--text-light);}
.main .content-desktop{padding:24px 28px;}

/* ===== 桌面表格 ===== */
.table{width:100%;background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);border-collapse:collapse;}
.table th,.table td{padding:12px 14px;text-align:left;font-size:14px;border-bottom:1px solid var(--border);}
.table th{background:#f8fafc;color:var(--text-light);font-weight:600;font-size:13px;}
.table tr:last-child td{border-bottom:none;}
.table tr:hover td{background:#fafcff;}
.table .thumb{width:40px;height:40px;border-radius:8px;object-fit:cover;}

/* ===== 模态框 ===== */
.modal-mask{position:fixed;inset:0;background:rgba(15,23,42,.5);display:flex;align-items:flex-end;z-index:50;}
.modal-mask.center{align-items:center;justify-content:center;padding:20px;}
.modal{background:#fff;width:100%;max-width:480px;border-radius:18px 18px 0 0;padding:20px;animation:slideUp .25s ease;}
.modal-mask.center .modal{border-radius:18px;animation:fadeIn .2s ease;}
.modal h3{font-size:18px;margin-bottom:14px;}
@keyframes slideUp{from{transform:translateY(100%);}to{transform:translateY(0);}}
@keyframes fadeIn{from{opacity:0;}to{opacity:1;}}

/* ===== 手机 App 框架 ===== */
.phone{width:390px;margin:30px auto;background:#000;border-radius:44px;padding:12px;box-shadow:var(--shadow-lg);}
.phone .screen{background:var(--bg);border-radius:34px;overflow:hidden;height:780px;position:relative;display:flex;flex-direction:column;}
.phone .statusbar{height:44px;display:flex;align-items:center;justify-content:space-between;padding:0 24px;font-size:13px;font-weight:600;color:#0f172a;background:#fff;}
.phone .statusbar .icons{display:flex;gap:6px;}

/* ===== 杂项 ===== */
.empty{text-align:center;color:var(--text-mute);padding:40px 0;font-size:14px;}
.empty .ic{font-size:40px;margin-bottom:10px;opacity:.5;}
.toast{position:fixed;bottom:90px;left:50%;transform:translateX(-50%);background:#0f172a;color:#fff;padding:10px 18px;border-radius:999px;font-size:14px;z-index:60;opacity:0;transition:.3s;pointer-events:none;}
.toast.show{opacity:1;bottom:110px;}
.divider{height:1px;background:var(--border);margin:16px 0;}
.muted{color:var(--text-light);font-size:13px;}
.pill{display:inline-block;padding:3px 10px;border-radius:999px;background:var(--primary-light);color:var(--primary);font-size:12px;font-weight:600;}
.kv{display:flex;justify-content:space-between;padding:8px 0;border-bottom:1px dashed var(--border);font-size:14px;}
.kv:last-child{border-bottom:none;}
.kv .k{color:var(--text-light);}