/* ==========================================================
   base.css —— 设计变量 / 复位 / 应用骨架布局 / 通用工具类
   ========================================================== */
:root{
  --brand:#2563eb; --brand-600:#1d4ed8; --brand-700:#1e40af;
  --brand-50:#eff6ff; --brand-100:#dbeafe;
  --bg:#f4f6fa; --card:#ffffff;
  --text:#0f172a; --text-2:#334155; --muted:#64748b; --faint:#94a3b8;
  --border:#e4e8f0; --border-2:#eef2f7;
  --success:#16a34a; --success-50:#ecfdf5;
  --warn:#d97706;    --warn-50:#fffbeb;
  --danger:#dc2626;  --danger-50:#fef2f2;
  --purple:#7c3aed;  --teal:#0d9488; --orange:#ea580c;
  --r-lg:12px; --r:9px; --r-sm:6px;
  --sh:0 1px 2px rgba(15,23,42,.05), 0 1px 3px rgba(15,23,42,.07);
  --sh-lg:0 12px 34px rgba(15,23,42,.16);
  --topbar-h:58px; --sidebar-w:214px;
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,"Noto Sans CJK SC",sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{
  font-family:var(--font);
  font-size:14px; line-height:1.6; color:var(--text);
  background:var(--bg); -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p{margin:0}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
ul{margin:0;padding:0;list-style:none}
table{border-collapse:collapse;width:100%}
::-webkit-scrollbar{width:9px;height:9px}
::-webkit-scrollbar-thumb{background:#cbd5e1;border-radius:8px}
::-webkit-scrollbar-thumb:hover{background:#94a3b8}
::-webkit-scrollbar-track{background:transparent}

.icon{width:17px;height:17px;fill:none;stroke:currentColor;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round;flex:none;vertical-align:-3px}
.icon.sm{width:14px;height:14px}

/* ---------- 应用骨架 ---------- */
.app{
  display:grid; min-height:100vh;
  grid-template-columns:var(--sidebar-w) minmax(0,1fr);
  grid-template-rows:var(--topbar-h) minmax(0,1fr);
  grid-template-areas:"side top" "side main";
}
.sidebar{
  grid-area:side; background:#0f172a; color:#cbd5e1;
  display:flex; flex-direction:column; overflow:hidden; z-index:40;
}
.topbar{
  grid-area:top; background:#fff; border-bottom:1px solid var(--border);
  display:flex; align-items:center; gap:10px; padding:0 16px; z-index:30;
}
.view{grid-area:main; overflow:auto; padding:18px 20px 40px; min-width:0}

/* ---------- 侧边栏 ---------- */
.brand{display:flex;align-items:center;gap:10px;padding:16px 16px 14px}
/* 品牌标识：新「智拓科技」Logo。外框尺寸 / 圆角 / 位置沿用旧「R」标识（32×32），
   仅把内联 SVG 换成 PNG 图片；object-fit:contain 保证任何容器下都不拉伸变形。 */
.brand-mark{
  width:32px;height:32px;flex:none;border-radius:8px;
  object-fit:contain;object-position:center;
  background:#fff;box-sizing:border-box;
}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-text strong{color:#fff;font-size:15px;letter-spacing:.5px}
.brand-text span{color:#7c8ba1;font-size:11px}
.nav{flex:1;overflow:auto;padding:6px 10px}
.nav-item{
  display:flex;align-items:center;gap:10px;width:100%;
  padding:9px 11px;border-radius:var(--r-sm);color:#b6c2d4;
  font-size:13.5px;margin-bottom:2px;text-align:left;transition:.15s;
}
.nav-item:hover{background:rgba(255,255,255,.07);color:#fff}
.nav-item.active{background:var(--brand);color:#fff;box-shadow:0 4px 12px rgba(37,99,235,.34)}
.nav-item .icon{opacity:.9}
.side-foot{padding:10px;border-top:1px solid rgba(255,255,255,.08)}
.side-user{display:flex;align-items:center;gap:9px;padding:8px}
.side-user .avatar{width:30px;height:30px;font-size:12px}
.side-user .who{line-height:1.3;overflow:hidden}
.side-user .who b{display:block;color:#e2e8f0;font-size:12.5px;font-weight:600}
.side-user .who span{font-size:11px;color:#7c8ba1}

/* ---------- 顶栏 ---------- */
/* 顶栏品牌标识：仅移动端显示（桌面端侧边栏已有品牌区），不挤占桌面布局 */
.topbar-brand{
  display:none;align-items:center;gap:6px;text-decoration:none;
  color:var(--text);font-size:13.5px;font-weight:700;flex:none;
  padding-right:9px;margin-right:2px;border-right:1px solid var(--border);
}
.topbar-brand img{width:24px;height:24px;object-fit:contain;object-position:center;border-radius:6px;background:#fff;flex:none}
.topbar-brand span{letter-spacing:.3px}
.topbar-title{font-size:16px;font-weight:700;letter-spacing:.3px}
.topbar-right{margin-left:auto;display:flex;align-items:center;gap:10px}
.role-chip{
  font-size:11.5px;padding:3px 9px;border-radius:99px;font-weight:600;
  background:var(--brand-50);color:var(--brand-700);border:1px solid var(--brand-100);
}
.role-chip.admin{background:#f5f3ff;color:#6d28d9;border-color:#ede9fe}
.icon-btn{
  width:34px;height:34px;border-radius:var(--r-sm);display:inline-flex;
  align-items:center;justify-content:center;color:var(--text-2);border:1px solid var(--border);background:#fff;
}
.icon-btn:hover{background:var(--bg)}
.icon-btn.danger{color:var(--danger)}
.icon-btn.danger:hover{background:var(--danger-50)}

.user-switch{position:relative}
.user-btn{
  display:flex;align-items:center;gap:7px;padding:4px 10px 4px 4px;
  border:1px solid var(--border);border-radius:99px;background:#fff;
  font-size:13px;font-weight:600;color:var(--text-2);
}
.user-btn:hover{border-color:#cbd5e1}
.user-btn .caret{width:0;height:0;border:4px solid transparent;border-top-color:var(--muted);margin-top:3px}
.user-menu{
  position:absolute;right:0;top:calc(100% + 8px);min-width:224px;z-index:60;
  background:#fff;border:1px solid var(--border);border-radius:var(--r);
  box-shadow:var(--sh-lg);padding:6px;display:none;
}
.user-menu.open{display:block}
.user-menu .um-head{padding:7px 10px;font-size:11.5px;color:var(--muted);font-weight:600}
.user-menu button{
  display:flex;align-items:center;gap:9px;width:100%;padding:8px 10px;
  border-radius:var(--r-sm);text-align:left;font-size:13px;
}
.user-menu button:hover{background:var(--bg)}
.user-menu button.cur{background:var(--brand-50);color:var(--brand-700);font-weight:600}
.user-menu .um-sep{height:1px;background:var(--border-2);margin:5px 4px}

/* ---------- 工具类 ---------- */
.row{display:flex;align-items:center;gap:8px}
.row.wrap{flex-wrap:wrap}
.between{display:flex;align-items:center;justify-content:space-between;gap:10px}
.col{display:flex;flex-direction:column;gap:8px}
.grow{flex:1;min-width:0}
.muted{color:var(--muted)}
.faint{color:var(--faint)}
.sm{font-size:12.5px}
.xs{font-size:11.5px}
.b{font-weight:700}
.t-right{text-align:right}
.t-center{text-align:center}
.nowrap{white-space:nowrap}
.ellip{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.mono{font-family:var(--mono)}
.mt8{margin-top:8px}.mt12{margin-top:12px}.mt16{margin-top:16px}
.mb8{margin-bottom:8px}.mb12{margin-bottom:12px}.mb16{margin-bottom:16px}
.hidden{display:none !important}
.only-mobile{display:none !important}

/* 页面头部 */
.page-head{display:flex;align-items:flex-end;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:14px}
.page-head h2{font-size:19px;font-weight:700;letter-spacing:.3px}
.page-head .desc{color:var(--muted);font-size:12.5px;margin-top:2px}