/* ===== FH公司ERP系统 - 响应式样式（电脑端 + 手机端通用） ===== */
:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --bg: #f4f6fb;
  --sidebar-bg: #1e293b;
  --sidebar-text: #cbd5e1;
  --sidebar-active: #2563eb;
  --card-bg: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --border: #e5e7eb;
  --footer-bg: #1e293b;
  --footer-text: #94a3b8;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.5;
  -webkit-text-size-adjust: 100%;
}

a { color: inherit; text-decoration: none; }

/* ===== 布局 ===== */
.layout { display: flex; min-height: 100vh; }

/* 侧边栏 */
.sidebar {
  width: 230px;
  background: var(--sidebar-bg);
  color: var(--sidebar-text);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0; bottom: 0;
  transition: transform .25s ease;
  z-index: 1000;
}
.sidebar .brand {
  padding: 18px 20px;
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  border-bottom: 1px solid rgba(255,255,255,.08);
  letter-spacing: 1px;
}
.sidebar nav { flex: 1; overflow-y: auto; padding: 8px 0; }
.sidebar nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  color: var(--sidebar-text);
  font-size: 14px;
  border-left: 3px solid transparent;
  transition: background .15s, color .15s;
}
.sidebar nav a:hover { background: rgba(255,255,255,.06); color: #fff; }
.sidebar nav a.active {
  background: var(--sidebar-active);
  color: #fff;
  border-left-color: #fff;
}
.sidebar .side-foot {
  padding: 14px 20px;
  font-size: 12px;
  color: #64748b;
  border-top: 1px solid rgba(255,255,255,.08);
}

/* 主区域 */
.main {
  flex: 1;
  margin-left: 230px;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}
.topbar {
  height: 56px;
  background: #fff;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 16px;
  gap: 12px;
  position: sticky;
  top: 0;
  z-index: 900;
}
.topbar .menu-btn {
  display: none;
  background: none; border: none; font-size: 22px;
  cursor: pointer; color: var(--text);
}
.topbar .page-title { font-size: 17px; font-weight: 600; flex: 1; }
.topbar .user-box { display: flex; align-items: center; gap: 10px; font-size: 14px; }
.topbar .user-box .avatar {
  width: 32px; height: 32px; border-radius: 50%;
  background: var(--primary); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 14px; font-weight: 600;
}
.topbar .logout-btn {
  background: #f1f5f9; border: 1px solid var(--border);
  padding: 6px 12px; border-radius: 6px; cursor: pointer; font-size: 13px;
}
.topbar .logout-btn:hover { background: #e2e8f0; }

.content { flex: 1; padding: 20px; }

/* 卡片 */
.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px;
}
.card h2 { font-size: 16px; margin-bottom: 8px; }
.placeholder {
  color: var(--muted);
  text-align: center;
  padding: 60px 20px;
  border: 1px dashed var(--border);
  border-radius: 8px;
  margin-top: 16px;
}

/* 顶部统计格子（首页占位） */
.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }
.stat {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
}
.stat .label { color: var(--muted); font-size: 13px; }
.stat .value { font-size: 26px; font-weight: 700; margin-top: 6px; }

/* 遮罩（移动端侧边栏打开时） */
.overlay {
  display: none;
  position: fixed; inset: 0;
  background: rgba(0,0,0,.4);
  z-index: 999;
}

/* ===== 底部备案号 ===== */
.site-footer {
  background: var(--footer-bg);
  color: var(--footer-text);
  text-align: center;
  padding: 14px 16px;
  font-size: 13px;
}
.site-footer a { color: var(--footer-text); }

/* ===== 登录页 ===== */
.login-wrap {
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, #1e293b 0%, #2563eb 100%);
  padding: 16px;
}
.login-card {
  background: #fff;
  width: 100%;
  max-width: 380px;
  border-radius: 14px;
  padding: 32px 28px;
  box-shadow: 0 12px 40px rgba(0,0,0,.25);
}
.login-card .logo {
  text-align: center; font-size: 22px; font-weight: 700; color: var(--primary);
  margin-bottom: 4px;
}
.login-card .sub { text-align: center; color: var(--muted); font-size: 13px; margin-bottom: 24px; }
.login-card label { display: block; font-size: 13px; color: var(--text); margin: 14px 0 6px; }
.login-card input {
  width: 100%; padding: 11px 12px; border: 1px solid var(--border);
  border-radius: 8px; font-size: 14px; outline: none;
}
.login-card input:focus { border-color: var(--primary); }
.login-card button {
  width: 100%; margin-top: 22px; padding: 12px;
  background: var(--primary); color: #fff; border: none;
  border-radius: 8px; font-size: 15px; cursor: pointer; font-weight: 600;
}
.login-card button:hover { background: var(--primary-dark); }
.login-card .err { color: #dc2626; font-size: 13px; margin-top: 12px; min-height: 18px; text-align: center; }
.login-footer { text-align: center; color: var(--footer-text); font-size: 12px; margin-top: 18px; }

/* ===== 响应式：手机端 ===== */
@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); width: 240px; }
  .sidebar.open { transform: translateX(0); }
  .main { margin-left: 0; }
  .topbar .menu-btn { display: block; }
  .content { padding: 14px; }
  .card { padding: 18px; }
  .overlay.show { display: block; }
  .topbar .user-box .name-text { display: none; }
}