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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    sans-serif;
  background-color: #f5f5f5;
  color: #333;
  line-height: 1.6;
}

.page-container {
  max-width: 480px;
  margin: 0 auto;
  background-color: #fff;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
}

.page-header {
  background-color: #fff;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid #eee;
}

.page-header.blue-header {
  background-color: #00a6ff;
  border-bottom: none;
}

.page-header.white-bg {
  background-color: #f5f5f5;
  border-bottom: none;
}

.btn-back {
  background: none;
  border: none;
  padding: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #333;
}

.btn-back.white {
  color: #fff;
}

.btn-back svg {
  width: 24px;
  height: 24px;
}

.page-title {
  flex: 1;
  text-align: center;
  font-size: 18px;
  font-weight: 500;
  margin-right: 32px;
}

.page-content {
  flex: 1;
  padding: 16px;
  padding-bottom: 80px;
}

/* Buttons */
.btn-primary {
  width: 100%;
  padding: 14px;
  background: linear-gradient(135deg, #00a6ff 0%, #0080ff 100%);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s;
}

.btn-primary:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: translateY(0);
}

/* Bottom Navigation */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  max-width: 480px;
  width: 100%;
  background-color: #fff;
  display: flex;
  justify-content: space-around;
  padding: 8px 0;
  border-top: 1px solid #eee;
  box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
}

.nav-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 4px;
  text-decoration: none;
  color: #999;
  transition: color 0.3s;
}

.nav-item.active {
  color: #00a6ff;
}

.nav-icon {
  width: 24px;
  height: 24px;
  stroke-width: 2;
}

.nav-label {
  font-size: 12px;
}

/* Tabs */
.tabs {
  display: flex;
  background-color: #fff;
  border-bottom: 1px solid #eee;
  position: sticky;
  top: 53px;
  z-index: 99;
}

.tab-btn {
  flex: 1;
  padding: 14px;
  background: none;
  border: none;
  font-size: 15px;
  color: #666;
  cursor: pointer;
  position: relative;
  transition: color 0.3s;
}

.tab-btn.active {
  color: #00a6ff;
  font-weight: 500;
}

.tab-btn.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 40px;
  height: 3px;
  background-color: #00a6ff;
  border-radius: 2px 2px 0 0;
}

/* Form Styles */
.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-size: 14px;
  color: #666;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px;
  border: 1px solid #e0e0e0;
  border-radius: 6px;
  font-size: 15px;
  transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: #00a6ff;
}

/* Utility Classes */
.red {
  color: #ff4757;
}

.green {
  color: #26de81;
}

.text-center {
  text-align: center;
}

.mt-16 {
  margin-top: 16px;
}

.mb-16 {
  margin-bottom: 16px;
}