body {
  background: #f4f7fa;
  margin: 0;
  font-family: 'Segoe UI', Arial, 'PingFang SC', sans-serif;
}
.top-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #2874d5;
  color: #fff;
  padding: 14px 20px 10px 18px;
  font-size: 1.19rem;
  font-weight: bold;
  height: 56px;
}
.logo { letter-spacing: 2px; }
.top-actions { display: flex; gap: 8px; }
.icon-btn {
  background: rgba(255,255,255,0.11);
  border: none;
  color: #fff;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  font-size: 1.25rem;
  cursor: pointer;
}
.search-wrapper {
  display: flex;
  align-items: center;
  background: #2874d5;
  padding: 0 14px 17px 14px;
}
.search-input {
  flex:1;
  border: none;
  border-radius: 24px;
  padding: 11px 16px;
  font-size: 1.13rem;
  outline: none;
  background: #fff;
  box-shadow: 0 2px 7px #12376913;
  margin-right: 8px;
}
.search-btn {
  background: #fff;
  border-radius: 50%;
  border: none;
  width: 38px;
  height: 38px;
  font-size: 1.3rem;
  color: #2874d5;
  box-shadow: 0 2px 7px #12376913;
  display: flex;
  align-items: center;
  justify-content: center;
}
.phone-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 15px;
  padding: 15px 14px 78px 14px;
}
.phone-card {
  background: #fff;
  border-radius: 16px;
  box-shadow: 0 2px 10px #c0d3fb22;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 26px 4px 17px 4px;
  font-size: 1.13rem;
  position: relative;
  min-height: 104px;
  cursor: pointer;
  transition: box-shadow 0.22s;
}
.phone-card:active, .phone-card:hover {
  box-shadow: 0 2px 16px #81aee522;
}
.phone-card.sold {
  opacity: 0.52;
  pointer-events: none;
}
.phone-card .number {
  color: #2874d5;
  font-size: 1.26rem;
  font-weight: bold;
  line-height: 1.43;
  letter-spacing: 2px;
  text-align: center;
  margin-bottom: 6px;
  word-break: break-word;
}
.phone-card .price,
.phone-card .consult,
.phone-card .sold-text {
  font-size: 1.07rem;
  margin-top: 1px;
}
.phone-card .price { color: #165dc1; font-weight: 600; }
.phone-card .consult { color: #db8800; }
.phone-card .sold-text { color: #999; }
.hot-badge {
  position: absolute;
  right: 12px;
  top: 10px;
  background: #ff4141;
  color: #fff;
  padding: 3px 11px 1px 11px;
  border-radius: 11px;
  font-size: 0.92rem;
  font-weight: 600;
  box-shadow: 0 1px 4px #91261b12;
}
.sold-badge {
  position: absolute;
  right: 12px;
  top: 10px;
  background: #b7b8bc;
  color: #fff;
  padding: 3px 10px 1px 10px;
  border-radius: 10px;
  font-size: 0.92rem;
  font-weight: 600;
}
.nav-bar {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  height: 57px;
  background: #fff;
  border-top: 1px solid #e5e5ea;
  display: flex;
  z-index: 50;
  box-shadow: 0 -2px 10px #e7eeff0a;
}
.nav-item {
  flex: 1; text-align: center; font-size: 1.02rem; color: #2474cf; display: flex; flex-direction: column; justify-content: center; align-items: center; transition: color 0.15s;
  padding-top: 4px;
}
.nav-item span { font-size: 1.36rem; display: block; }
.nav-item.selected { color: #2874d5; font-weight: bold; }
@media (min-width: 540px) {
  .phone-grid { max-width: 480px; margin: 0 auto; }
}