/* 基础样式 */
* {
  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: #f5f7fa;
  color: #333;
  line-height: 1.6;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 16px;
}

/* 头部 */
.header {
  background: #fff;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}

.logo {
  font-size: 20px;
  color: #2563eb;
}

.nav a {
  color: #666;
  text-decoration: none;
  margin-left: 20px;
  font-size: 14px;
  transition: color 0.2s;
}

.nav a:hover {
  color: #2563eb;
}

/* Hero */
.hero {
  text-align: center;
  padding: 40px 0 30px;
}

.hero h2 {
  font-size: 24px;
  color: #1a1a1a;
  margin-bottom: 8px;
}

.hero p {
  color: #666;
  font-size: 15px;
}

/* 筛选 */
.filters {
  display: flex;
  gap: 12px;
  margin-bottom: 20px;
}

.filters select {
  padding: 8px 12px;
  border: 1px solid #ddd;
  border-radius: 8px;
  background: #fff;
  font-size: 14px;
  color: #333;
  cursor: pointer;
}

/* 帖子列表 */
.post-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.post-card {
  background: #fff;
  border-radius: 12px;
  padding: 16px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.04);
  cursor: pointer;
  transition: box-shadow 0.2s;
}

.post-card:hover {
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

.post-card-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

.post-type-tag {
  font-size: 12px;
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 500;
}

.tag-has-room {
  background: #dcfce7;
  color: #166534;
}

.tag-need-room {
  background: #fef3c7;
  color: #92400e;
}

.tag-together {
  background: #dbeafe;
  color: #1e40af;
}

.post-card-title {
  font-size: 16px;
  font-weight: 600;
  color: #1a1a1a;
  margin-bottom: 6px;
}

.post-card-desc {
  font-size: 14px;
  color: #666;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 12px;
  font-size: 12px;
  color: #999;
}

.post-card-info {
  display: flex;
  gap: 12px;
}

.post-price {
  color: #ef4444;
  font-weight: 600;
  font-size: 16px;
}

/* 帖子详情 */
.back-link {
  display: inline-block;
  margin: 16px 0;
  color: #2563eb;
  text-decoration: none;
  font-size: 14px;
}

.detail-card {
  background: #fff;
  border-radius: 12px;
  padding: 24px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.04);
}

.detail-title {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
}

.detail-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 16px;
  font-size: 13px;
  color: #666;
}

.detail-meta span {
  background: #f3f4f6;
  padding: 4px 10px;
  border-radius: 6px;
}

.detail-desc {
  font-size: 15px;
  line-height: 1.8;
  margin-bottom: 20px;
  white-space: pre-wrap;
}

.detail-info-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0;
  padding: 16px;
  background: #f8fafc;
  border-radius: 8px;
}

.detail-info-item {
  font-size: 13px;
  padding: 4px 10px;
  background: #fff;
  border: 1px solid #e2e8f0;
  border-radius: 6px;
  color: #334155;
}

.detail-contact {
  background: #f0f9ff;
  border: 1px solid #bae6fd;
  border-radius: 8px;
  padding: 16px;
  margin-top: 16px;
}

.detail-contact h4 {
  margin-bottom: 8px;
  color: #0369a1;
}

.detail-contact p {
  font-size: 14px;
  margin: 4px 0;
}

.report-btn {
  margin-top: 16px;
  font-size: 13px;
  color: #999;
  background: none;
  border: none;
  cursor: pointer;
  text-decoration: underline;
}

.report-btn:hover {
  color: #ef4444;
}

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

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 6px;
  color: #374151;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid #ddd;
  border-radius: 8px;
  font-size: 14px;
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: #2563eb;
}

.form-group input[type="checkbox"] {
  width: auto;
  margin-right: 6px;
}

.form-row {
  display: flex;
  gap: 12px;
}

.form-row .form-group {
  flex: 1;
}

.checkbox-group {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.checkbox-group label {
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 4px;
  cursor: pointer;
}

/* 按钮 */
.btn {
  display: inline-block;
  padding: 12px 24px;
  border: none;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s;
  width: 100%;
  text-align: center;
}

.btn-primary {
  background: #2563eb;
  color: #fff;
}

.btn-primary:hover {
  background: #1d4ed8;
}

.btn-secondary {
  background: #f3f4f6;
  color: #374151;
  margin-top: 16px;
}

.btn-secondary:hover {
  background: #e5e7eb;
}

/* 认证页 */
.auth-box {
  max-width: 400px;
  margin: 40px auto;
  background: #fff;
  border-radius: 12px;
  padding: 24px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.04);
}

.auth-tabs {
  display: flex;
  margin-bottom: 24px;
  border-bottom: 1px solid #eee;
}

.auth-tab {
  flex: 1;
  padding: 12px;
  border: none;
  background: none;
  font-size: 15px;
  cursor: pointer;
  color: #666;
  border-bottom: 2px solid transparent;
  transition: all 0.2s;
}

.auth-tab.active {
  color: #2563eb;
  border-bottom-color: #2563eb;
}

/* 个人中心 */
#page-profile h2 {
  margin: 20px 0;
}

#page-profile h3 {
  margin: 24px 0 12px;
}

.profile-card {
  background: #fff;
  border-radius: 12px;
  padding: 16px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.04);
}

.profile-card p {
  margin: 6px 0;
  font-size: 14px;
}

/* 分页 */
.pagination {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin: 24px 0;
}

.pagination button {
  padding: 8px 14px;
  border: 1px solid #ddd;
  border-radius: 6px;
  background: #fff;
  cursor: pointer;
  font-size: 14px;
}

.pagination button.active {
  background: #2563eb;
  color: #fff;
  border-color: #2563eb;
}

/* 页面切换 */
.page {
  display: none;
}

.page.active {
  display: block;
}

/* 提示 */
.loading {
  text-align: center;
  color: #999;
  padding: 40px;
}

.empty {
  text-align: center;
  color: #999;
  padding: 60px 0;
}

.toast {
  position: fixed;
  top: 70px;
  left: 50%;
  transform: translateX(-50%);
  background: #1a1a1a;
  color: #fff;
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 14px;
  z-index: 1000;
  animation: fadeIn 0.3s;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateX(-50%) translateY(-10px); }
  to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* 底部 */
.footer {
  text-align: center;
  padding: 30px 0;
  color: #999;
  font-size: 13px;
  margin-top: 40px;
}

.footer-note {
  margin-top: 4px;
  color: #bbb;
}

/* 图片上传 */
.image-upload-area {
  border: 2px dashed #ddd;
  border-radius: 8px;
  padding: 24px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s;
}

.image-upload-area:hover {
  border-color: #2563eb;
}

.image-upload-area p {
  color: #666;
  font-size: 14px;
}

.upload-hint {
  font-size: 12px !important;
  color: #999 !important;
  margin-top: 4px;
}

.image-preview-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.image-preview-item {
  position: relative;
  width: 80px;
  height: 80px;
  border-radius: 6px;
  overflow: hidden;
}

.image-preview-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.image-remove-btn {
  position: absolute;
  top: 2px;
  right: 2px;
  width: 20px;
  height: 20px;
  background: rgba(0,0,0,0.6);
  color: #fff;
  border: none;
  border-radius: 50%;
  font-size: 14px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.image-compress-info {
  font-size: 11px;
  color: #999;
  margin-top: 4px;
}

/* 帖子详情图片 */
.detail-images {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0;
}

.detail-images img {
  width: 120px;
  height: 120px;
  object-fit: cover;
  border-radius: 8px;
  cursor: pointer;
}

.detail-images img:hover {
  opacity: 0.8;
}

/* 图片全屏查看 */
.image-viewer {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.92);
  z-index: 9999;
  justify-content: center;
  align-items: center;
  flex-direction: column;
}

.image-viewer.active {
  display: flex;
}

.image-viewer img {
  max-width: 90%;
  max-height: 80vh;
  object-fit: contain;
  border-radius: 4px;
}

.image-viewer-close {
  position: absolute;
  top: 16px;
  right: 20px;
  color: #fff;
  font-size: 32px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 8px;
}

.image-viewer-nav {
  display: flex;
  gap: 20px;
  margin-top: 16px;
}

.image-viewer-nav button {
  background: rgba(255,255,255,0.2);
  color: #fff;
  border: none;
  padding: 8px 20px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
}

.image-viewer-counter {
  color: #aaa;
  font-size: 13px;
  margin-top: 8px;
}

/* 移动端适配 */
@media (max-width: 600px) {
  .hero h2 {
    font-size: 20px;
  }
  
  .filters {
    flex-direction: column;
  }
  
  .form-row {
    flex-direction: column;
    gap: 0;
  }
  
  .nav a {
    margin-left: 12px;
    font-size: 13px;
  }
}