/* 公共样式 - 对齐微信小程序设计系统 */
:root {
  --color-primary: #FFA500;
  --color-primary-dark: #E69500;
  --color-secondary: #FF8C00;
  --color-light-bg: #f5f5f5;
  --color-card-bg: #ffffff;
  --color-text-primary: #333;
  --color-text-secondary: #666;
  --color-text-hint: #999;
  --color-border: #e8e8e8;
  --color-error: #F44336;
  --color-success: #4CAF50;
  --color-warning: #FF9800;
  --border-radius-sm: 8px;
  --border-radius-md: 12px;
  --border-radius-lg: 16px;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
  --safe-area-bottom: env(safe-area-inset-bottom, 0px);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background-color: var(--color-light-bg);
  color: var(--color-text-primary);
  font-size: 28px; /* 参考小程序 28rpx ≈ 14px 基准 */
  line-height: 1.5;
  -webkit-tap-highlight-color: transparent;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

img {
  max-width: 100%;
  height: auto;
}

button {
  font-family: inherit;
}

/* 页面容器 */
.page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  padding-bottom: calc(60px + var(--safe-area-bottom));
  max-width: 750px;
  margin: 0 auto;
  width: 100%;
}

/* 头部导航 */
.header {
  background: var(--color-card-bg);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 1px 0 var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.logo {
  font-size: 20px;
  font-weight: bold;
  color: var(--color-primary);
}

/* 底部 Tab 导航 */
.tab-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--color-card-bg);
  display: flex;
  justify-content: space-around;
  padding: 8px 0 calc(8px + var(--safe-area-bottom));
  box-shadow: 0 -1px 0 var(--color-border);
  z-index: 100;
  max-width: 750px;
  margin: 0 auto;
}

.tab-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 4px 12px;
  color: var(--color-text-hint);
  font-size: 12px;
  transition: color 0.2s;
  cursor: pointer;
  background: none;
  border: none;
  font-family: inherit;
}

.tab-item.active {
  color: var(--color-primary);
  font-weight: bold;
}

.tab-icon {
  font-size: 24px;
  margin-bottom: 2px;
}

/* 通用按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border-radius: var(--border-radius-sm);
  font-size: 16px;
  font-weight: 500;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
}

.btn:active {
  transform: scale(0.96);
  opacity: 0.8;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

.btn-primary:disabled {
  background: #ccc;
  color: #666;
  cursor: not-allowed;
}

.btn-block {
  display: flex;
  width: 100%;
}

/* 表单 */
.form-group {
  margin-bottom: 16px;
}

.form-label {
  display: block;
  margin-bottom: 8px;
  font-size: 14px;
  color: var(--color-text-secondary);
}

.form-input {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  font-size: 16px;
  transition: border-color 0.2s;
  font-family: inherit;
}

.form-input:focus {
  outline: none;
  border-color: var(--color-primary);
}

.form-input::placeholder {
  color: var(--color-text-hint);
}

/* 卡片 */
.card {
  background: var(--color-card-bg);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

/* section 区块 */
.section {
  background: var(--color-card-bg);
  margin: 12px 16px;
  border-radius: var(--border-radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.section-header {
  padding: 16px 20px;
  display: flex;
  align-items: center;
  font-weight: bold;
  font-size: 16px;
  border-bottom: 1px solid var(--color-border);
}

.section-icon {
  font-size: 20px;
  margin-right: 8px;
}

.section-title {
  font-size: 16px;
  font-weight: bold;
  flex: 1;
}

/* 空状态 */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 20px;
  color: var(--color-text-hint);
}

.empty-icon {
  font-size: 60px;
  margin-bottom: 16px;
  opacity: 0.5;
}

.empty-text {
  font-size: 14px;
  margin-bottom: 24px;
}

.empty-action {
  padding: 12px 32px;
  background: var(--color-primary);
  color: #fff;
  border-radius: 8px;
  font-size: 16px;
  cursor: pointer;
}

/* 加载状态 */
.loading-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 100px 0;
}

.loading-spinner {
  width: 30px;
  height: 30px;
  border: 3px solid var(--color-border);
  border-top: 3px solid var(--color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading-text {
  margin-top: 12px;
  font-size: 14px;
  color: var(--color-text-hint);
}

/* 工具类 */
.text-center { text-align: center; }
.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-hint { color: var(--color-text-hint); }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mb-16 { margin-bottom: 16px; }
.p-16 { padding: 16px; }

/* 页面加载最大宽度 */
@media (min-width: 750px) {
  body {
    background: #e0e0e0;
  }
  .page {
    border-left: 1px solid var(--color-border);
    border-right: 1px solid var(--color-border);
    background: var(--color-light-bg);
  }
  .tab-bar {
    border-left: 1px solid var(--color-border);
    border-right: 1px solid var(--color-border);
  }
}