:root {
  --color-bg:      #f0f9ff;
  --color-surface: #ffffff;
  --color-border:  #e2e8f0;
  --color-primary: #0284c7;
  --color-primary-h:#0369a1;
  --color-accent:  #38bdf8;
  --color-success: #22c55e;
  --color-warning: #f59e0b;
  --color-danger:  #ef4444;
  --color-text:    #0c4a6e;
  --color-muted:   #6b7280;
  --radius-sm:     8px;
  --radius:        12px;
  --radius-lg:     16px;
  --shadow-sm:     0 1px 3px rgba(0,0,0,0.08);
  --shadow:        0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg:     0 8px 32px rgba(0,0,0,0.12);
  --transition:    0.2s ease;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { width: 100%; min-height: 100vh; }
body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Segoe UI Emoji', 'Apple Color Emoji', 'Noto Color Emoji', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
.fa, .fas, .far, .fa-solid, .fa-regular {
  font-family: "Font Awesome 6 Free" !important;
  font-weight: 900;
}
.container, .app-shell { width: 100%; max-width: 430px; margin: 0 auto; padding: 0 16px; }
a { color: var(--color-primary); text-decoration: none; transition: color var(--transition); }
img { max-width: 100%; display: block; }
button { cursor: pointer; font-family: inherit; }

/* ===== 顶部标题栏 ===== */
.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  height: 56px;
  margin: 0 -16px;
  padding: 0 16px;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.topbar-title { font-size: 18px; font-weight: 700; color: var(--color-text); }
.topbar-icon { font-size: 18px; color: var(--color-primary); }
.topbar-back { font-size: 18px; color: var(--color-text); padding: 8px 8px 8px 0; }

/* ===== 主体 ===== */
.main { padding: 16px 0 76px; }

/* ===== 欢迎区 ===== */
.hero { padding: 8px 0 16px; }
.hero-title { font-size: 24px; line-height: 1.3; font-weight: 700; color: var(--color-text); }
.hero-highlight { color: var(--color-primary); }
.hero-sub { font-size: 14px; color: var(--color-muted); margin-top: 6px; }

/* ===== 卡片 ===== */
.card {
  background: var(--color-surface);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  padding: 16px;
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 24px;
  min-height: 44px;
  border: none;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  transition: transform var(--transition), background var(--transition);
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--color-primary); color: #ffffff; }
.btn-primary:hover { background: var(--color-primary-h); color: #ffffff; transform: translateY(-1px); }
.btn-outline {
  background: var(--color-surface);
  color: var(--color-primary);
  border: 1px dashed var(--color-primary);
  width: 100%;
  margin-top: 12px;
}
.btn-block { width: 100%; margin-top: 16px; }

/* ===== 区块标题 ===== */
.section-title { font-size: 16px; font-weight: 700; margin: 20px 0 10px; display: block; }

/* ===== 统计卡片 ===== */
.stat-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.stat-grid-3 { grid-template-columns: 1fr 1fr 1fr; margin-bottom: 8px; }
.stat-card { text-align: center; padding: 16px 8px; }
.stat-num { font-size: 22px; font-weight: 700; color: var(--color-primary); line-height: 1.3; }
.stat-grid-3 .stat-num { font-size: 18px; }
.stat-unit { font-size: 13px; font-weight: 600; color: var(--color-muted); margin-left: 2px; }
.stat-label { font-size: 13px; color: var(--color-muted); margin-top: 2px; }

/* ===== 流程卡片 ===== */
.flow-card { padding: 4px 16px; }
.flow-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 0;
  min-height: 44px;
  border-bottom: 1px solid #f1f5f9;
}
.flow-item:last-child { border-bottom: none; }
.flow-step {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: #e0f2fe;
  color: var(--color-primary);
  font-size: 14px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.flow-info { flex: 1; }
.flow-name { font-size: 15px; font-weight: 600; line-height: 1.4; }
.flow-desc { font-size: 13px; color: var(--color-muted); }
.flow-arrow { color: #cbd5e1; font-size: 14px; }

/* ===== 电器清单 ===== */
.appliance-item { margin-bottom: 12px; }
.appliance-head { display: flex; align-items: center; gap: 12px; }
.appliance-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: #e0f2fe;
  color: var(--color-primary);
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.appliance-info { flex: 1; }
.appliance-name { font-size: 15px; font-weight: 700; line-height: 1.4; }
.appliance-desc { font-size: 13px; color: var(--color-muted); }
.appliance-body { margin-top: 12px; padding-top: 12px; border-top: 1px solid #f1f5f9; }
.field-row {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  flex-wrap: wrap;
}
.field-label { font-size: 14px; color: var(--color-muted); min-width: 72px; }

/* 每台设备的铭牌拍照行 */
.plate-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px;
  margin-bottom: 8px;
  border-radius: var(--radius-sm);
  background: #f8fafc;
  border: 1px dashed #cbd5e1;
}
.plate-thumb {
  width: 44px;
  height: 44px;
  border-radius: 6px;
  object-fit: cover;
  border: 1px solid var(--color-border);
  flex-shrink: 0;
}
.plate-info { flex: 1; min-width: 0; }
.plate-label { font-size: 13px; font-weight: 700; line-height: 1.4; }
.plate-hint { font-size: 12px; color: var(--color-muted); }
.btn-plate {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  min-height: 36px;
  border: none;
  border-radius: 999px;
  background: #e0f2fe;
  color: var(--color-primary);
  font-size: 13px;
  font-weight: 600;
  flex-shrink: 0;
}
.btn-plate:active { background: #bae6fd; }

/* 时长加减 */
.time-picker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: #f8fafc;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 4px 8px;
}
.time-btn {
  width: 32px;
  height: 32px;
  border: none;
  border-radius: 6px;
  background: #e0f2fe;
  color: var(--color-primary);
  font-size: 13px;
}
.time-btn:active { background: #bae6fd; }
.time-val { font-size: 16px; font-weight: 700; min-width: 24px; text-align: center; }
.time-unit { font-size: 13px; color: var(--color-muted); }

/* 标签 */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 6px 14px;
  min-height: 32px;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: #f8fafc;
  color: var(--color-muted);
  font-size: 13px;
  cursor: pointer;
  transition: all var(--transition);
}
.tag-active {
  background: #e0f2fe;
  border-color: var(--color-primary);
  color: var(--color-primary);
  font-weight: 600;
}

/* 开关 */
.switch { position: relative; width: 48px; height: 28px; flex-shrink: 0; }
.switch input { opacity: 0; width: 0; height: 0; }
.slider {
  position: absolute;
  inset: 0;
  border-radius: 999px;
  background: #cbd5e1;
  transition: background var(--transition);
}
.slider::before {
  content: "";
  position: absolute;
  width: 22px;
  height: 22px;
  left: 3px;
  top: 3px;
  border-radius: 50%;
  background: #ffffff;
  transition: transform var(--transition);
}
.switch input:checked + .slider { background: var(--color-primary); }
.switch input:checked + .slider::before { transform: translateX(20px); }

/* ===== 用电类型 ===== */
.type-card { padding: 12px; }
.type-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.type-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 12px;
  min-height: 56px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: #f8fafc;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-muted);
  cursor: pointer;
  transition: all var(--transition);
}
.type-item i { font-size: 18px; }
.type-item.active {
  background: #e0f2fe;
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* ===== 改造条件 ===== */
.cond-card { padding: 4px 16px; }
.cond-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 0;
  border-bottom: 1px solid #f1f5f9;
  flex-wrap: wrap;
}
.cond-item:last-child { border-bottom: none; }
.cond-info { flex: 1; min-width: 140px; }
.cond-name { font-size: 15px; font-weight: 600; line-height: 1.4; }
.cond-desc { font-size: 12px; color: var(--color-muted); }
.cond-opts { display: flex; gap: 8px; }

/* ===== 报告页 ===== */
.chart-card { padding: 12px; }
.chart-box { width: 100%; height: 220px; }
.chart-legend { display: flex; justify-content: center; gap: 20px; padding: 10px 0 4px; }
.legend-item { display: inline-flex; align-items: center; gap: 6px; font-size: 12px; color: var(--color-muted); }
.legend-dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }

/* AI 建议 */
.tip-card { padding: 4px 16px; }
.tip-item { display: flex; gap: 12px; padding: 14px 0; border-bottom: 1px solid #f1f5f9; }
.tip-item:last-child { border-bottom: none; }
.tip-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: #e0f2fe;
  color: var(--color-primary);
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.tip-name { font-size: 15px; font-weight: 700; line-height: 1.4; }
.tip-desc { font-size: 13px; color: var(--color-muted); margin: 2px 0; }
.tip-save { font-size: 13px; font-weight: 700; color: var(--color-success); }

/* 预算表 */
.table-card { padding: 12px 16px; }
.budget-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.budget-table th {
  text-align: left;
  font-size: 13px;
  color: var(--color-muted);
  font-weight: 600;
  padding: 8px 4px;
  border-bottom: 1px solid var(--color-border);
}
.budget-table td { padding: 10px 4px; border-bottom: 1px solid #f1f5f9; }
.budget-table tbody tr:nth-child(even) { background: #f9fafb; }
.budget-table tfoot td { border-bottom: none; font-weight: 700; color: var(--color-text); }
.budget-total { color: var(--color-primary); font-size: 16px; }
.budget-note {
  margin-top: 10px;
  font-size: 13px;
  color: var(--color-success);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* ===== 我的页 ===== */
.user-card { display: flex; align-items: center; gap: 14px; margin-bottom: 16px; }
.avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: #e0f2fe;
  color: var(--color-primary);
  font-size: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.user-name { font-size: 17px; font-weight: 700; }
.user-sub { font-size: 13px; color: var(--color-muted); margin-top: 2px; }
.menu-card { padding: 4px 16px; margin-bottom: 8px; }
.menu-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 0;
  min-height: 44px;
  border-bottom: 1px solid #f1f5f9;
  color: var(--color-text);
}
.menu-item:last-child { border-bottom: none; }
.menu-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: #e0f2fe;
  color: var(--color-primary);
  font-size: 15px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.menu-name { flex: 1; font-size: 15px; font-weight: 600; }

/* ===== 底部Tab ===== */
.tabbar {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 430px;
  height: 60px;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  display: flex;
  z-index: 10;
}
.tab {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  font-size: 11px;
  color: #94a3b8;
}
.tab i { font-size: 18px; }
.tab.active { color: var(--color-primary); font-weight: 600; }