:root {
  --color-primary: #C23B22;
  --color-primary-dark: #A0311C;
  --color-primary-light: #F5E6E2;
  --color-accent: #D4A04A;
  --color-accent-light: #FBF3E8;
  --color-bg: #FAF7F2;
  --color-bg-card: #FFFFFF;
  --color-text: #2D2D2D;
  --color-text-secondary: #7A7A7A;
  --color-text-muted: #B8B8B8;
  --color-text-on-primary: #FFFFFF;
  --color-success: #4CAF50;
  --color-warning: #FF9800;
  --color-error: #E53935;
  --color-info: #2196F3;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 999px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --nav-height: 64px;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { font-size: 16px; -webkit-text-size-adjust: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--color-bg); color: var(--color-text); line-height: 1.6;
  min-height: 100vh; max-width: 480px; margin: 0 auto;
  -webkit-font-smoothing: antialiased;
}
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-thumb { background: var(--color-text-muted); border-radius: 2px; }

.app-header {
  position: sticky; top: 0; z-index: 100;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  padding: 14px var(--space-lg); display: flex; align-items: center; justify-content: space-between;
}
.app-header .brand { display: flex; align-items: center; gap: 10px; }
.app-header .brand-icon { font-size: 24px; }
.app-header .brand-text h1 { font-size: 18px; font-weight: 700; color: var(--color-text-on-primary); line-height: 1.2; }
.app-header .brand-text p { font-size: 11px; color: rgba(255,255,255,0.75); line-height: 1.2; }
.header-back {
  display: flex; align-items: center; gap: 6px;
  color: var(--color-text-on-primary); cursor: pointer; background: none; border: none;
  font-size: 13px; font-family: inherit; padding: 4px 0;
}

.page { display: none; padding-bottom: calc(var(--nav-height) + var(--space-md)); min-height: 100vh; }
.page.active { display: block; animation: pageIn 0.25s ease; }
@keyframes pageIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }

.search-bar {
  margin: var(--space-md); background: var(--color-bg-card); border-radius: var(--radius-md);
  padding: 10px 14px; display: flex; align-items: center; gap: 8px;
  box-shadow: var(--shadow-sm); border: 1px solid transparent;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.search-bar:focus-within { border-color: var(--color-primary); box-shadow: 0 0 0 3px rgba(194,59,34,0.1); }
.search-bar input { border: none; background: none; flex: 1; font-size: 14px; outline: none; color: var(--color-text); font-family: inherit; }
.search-bar input::placeholder { color: var(--color-text-muted); }

.section-header {
  display: flex; justify-content: space-between; align-items: baseline;
  padding: var(--space-lg) var(--space-lg) var(--space-sm);
}
.section-header h2 { font-size: 17px; font-weight: 700; }
.section-header .section-sub { font-size: 12px; color: var(--color-text-muted); }
.section-header .section-more { font-size: 12px; color: var(--color-primary); cursor: pointer; background: none; border: none; font-family: inherit; }

.category-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; padding: 0 var(--space-md); margin-bottom: var(--space-md); }
.category-item {
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  padding: 14px 4px; background: var(--color-bg-card); border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm); cursor: pointer; transition: transform 0.15s;
  user-select: none; -webkit-tap-highlight-color: transparent;
}
.category-item:active { transform: scale(0.95); }
.category-item .cat-icon { width: 42px; height: 42px; border-radius: var(--radius-full); display: flex; align-items: center; justify-content: center; font-size: 20px; }
.category-item .cat-name { font-size: 11px; font-weight: 500; text-align: center; }

.treatment-card {
  background: var(--color-bg-card); border-radius: var(--radius-md);
  margin: 0 var(--space-md) var(--space-sm); padding: 14px var(--space-md);
  box-shadow: var(--shadow-sm); cursor: pointer; transition: transform 0.15s;
}
.treatment-card:active { transform: scale(0.98); }
.treatment-card .card-header { display: flex; justify-content: space-between; align-items: flex-start; gap: 8px; margin-bottom: 6px; }
.treatment-card .card-title { font-size: 15px; font-weight: 600; flex: 1; line-height: 1.4; }
.treatment-card .card-price { color: var(--color-primary); font-weight: 700; font-size: 14px; white-space: nowrap; }
.treatment-card .card-tags { display: flex; flex-wrap: wrap; gap: 4px; margin-bottom: 6px; }
.treatment-card .card-tag { font-size: 10px; padding: 2px 8px; border-radius: var(--radius-full); background: var(--color-primary-light); color: var(--color-primary); font-weight: 500; }
.treatment-card .card-tag.special { background: #E8F5E9; color: #2E7D32; }
.treatment-card .card-meta { display: flex; gap: 14px; font-size: 11px; color: var(--color-text-muted); flex-wrap: wrap; }

.disease-item {
  display: flex; align-items: center; gap: 12px;
  padding: 14px var(--space-md); background: var(--color-bg-card); border-radius: var(--radius-md);
  margin: 0 var(--space-md) var(--space-sm); box-shadow: var(--shadow-sm); cursor: pointer;
  transition: transform 0.15s;
}
.disease-item:active { transform: scale(0.98); }
.disease-item .disease-icon { font-size: 26px; width: 44px; height: 44px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.disease-item .disease-info { flex: 1; min-width: 0; }
.disease-item .disease-name { font-size: 15px; font-weight: 600; }
.disease-item .disease-count { font-size: 11px; color: var(--color-text-muted); margin-top: 2px; }
.disease-item .disease-arrow { color: var(--color-text-muted); font-size: 18px; }

.sub-header { background: var(--color-bg-card); padding: var(--space-md) var(--space-lg); margin-bottom: var(--space-md); box-shadow: var(--shadow-sm); }
.sub-header .disease-name { font-size: 20px; font-weight: 700; margin-bottom: 4px; }
.sub-header .disease-sub { font-size: 13px; color: var(--color-text-secondary); }
.sub-header .stats-row { display: flex; gap: var(--space-lg); margin-top: 12px; padding-top: 12px; border-top: 1px solid #F0EBE6; }
.sub-header .stat-item { text-align: center; flex: 1; }
.sub-header .stat-num { font-size: 20px; font-weight: 700; color: var(--color-primary); }
.sub-header .stat-label { font-size: 11px; color: var(--color-text-muted); }

.detail-header { background: var(--color-bg-card); padding: var(--space-md) var(--space-lg) var(--space-lg); margin-bottom: var(--space-md); }
.detail-header .detail-title { font-size: 20px; font-weight: 700; margin-bottom: 8px; }
.detail-header .detail-tags { display: flex; flex-wrap: wrap; gap: 4px; margin-bottom: 10px; }
.detail-header .detail-stats { display: flex; gap: var(--space-lg); }
.detail-header .detail-stat { text-align: center; }
.detail-header .detail-stat .num { font-size: 22px; font-weight: 700; color: var(--color-primary); }
.detail-header .detail-stat .label { font-size: 11px; color: var(--color-text-muted); }

.preview-box { background: var(--color-bg-card); border-radius: var(--radius-md); margin: 0 var(--space-md) var(--space-sm); padding: var(--space-md); box-shadow: var(--shadow-sm); }
.preview-box .preview-label { font-size: 12px; color: var(--color-primary); font-weight: 600; margin-bottom: 8px; letter-spacing: 0.5px; }
.preview-box .preview-text { font-size: 14px; line-height: 1.7; color: var(--color-text-secondary); }

.paywall { background: linear-gradient(135deg, #FFF8F3, #FFF); border: 1.5px dashed var(--color-accent); border-radius: var(--radius-md); margin: 0 var(--space-md) var(--space-sm); padding: var(--space-lg); text-align: center; }
.paywall .pay-price { font-size: 28px; color: var(--color-primary); font-weight: 700; }
.paywall .pay-price span { font-size: 13px; font-weight: 400; color: var(--color-text-muted); }
.paywall .pay-desc { font-size: 12px; color: var(--color-text-muted); margin: 6px 0 var(--space-md); }

.btn-primary { background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark)); color: var(--color-text-on-primary); border: none; padding: 12px 40px; border-radius: var(--radius-full); font-size: 15px; font-weight: 600; cursor: pointer; font-family: inherit; transition: opacity 0.2s; display: inline-flex; align-items: center; justify-content: center; gap: 6px; }
.btn-primary:hover { opacity: 0.9; }
.btn-sm { padding: 8px 24px; font-size: 13px; }

.full-content { display: none; margin: 0 var(--space-md); }
.full-content.show { display: block; }

.feedback-section { margin: var(--space-md); }
.feedback-summary { background: var(--color-bg-card); border-radius: var(--radius-md); padding: var(--space-md); margin-bottom: var(--space-sm); box-shadow: var(--shadow-sm); }
.fb-stats-overview { display: flex; gap: var(--space-md); align-items: center; margin-bottom: 12px; }
.fb-avg-score { font-size: 30px; font-weight: 700; color: var(--color-primary); }
.fb-avg-score small { font-size: 14px; color: var(--color-text-muted); font-weight: 400; }
.fb-bar-item { display: flex; align-items: center; gap: 6px; margin-bottom: 3px; font-size: 11px; color: var(--color-text-secondary); }
.fb-bar-track { flex: 1; height: 6px; background: #F0EBE6; border-radius: var(--radius-full); overflow: hidden; }
.fb-bar-fill { height: 100%; background: var(--color-primary); border-radius: var(--radius-full); transition: width 0.3s; }
.fb-item { background: var(--color-bg-card); border-radius: var(--radius-md); padding: var(--space-md); margin-bottom: var(--space-sm); box-shadow: var(--shadow-sm); }
.fb-stars { color: #E6A817; font-size: 14px; }

.upload-area { background: var(--color-bg-card); border: 2px dashed var(--color-text-muted); border-radius: var(--radius-lg); margin: var(--space-md); padding: var(--space-xl) var(--space-md); text-align: center; cursor: pointer; transition: all 0.2s; }
.upload-area:hover { border-color: var(--color-primary); background: var(--color-primary-light); }
.paste-area { display: none; }
.paste-area.show { display: block; margin: 0 var(--space-md); }
.paste-area textarea { width: 100%; min-height: 120px; padding: 12px; border: 1px solid #E0D6CC; border-radius: var(--radius-md); font-size: 14px; font-family: inherit; resize: vertical; outline: none; background: var(--color-bg-card); color: var(--color-text); }
.paste-area textarea:focus { border-color: var(--color-primary); box-shadow: 0 0 0 3px rgba(194,59,34,0.1); }
.paste-area .paste-actions { display: flex; gap: 8px; margin-top: 10px; }

.badge { display: inline-block; padding: 2px 10px; border-radius: var(--radius-full); font-size: 10px; font-weight: 600; }
.badge-pending { background: #FFF3E0; color: #E65100; }
.badge-approved { background: #E8F5E9; color: #2E7D32; }
.badge-rejected { background: #FFEBEE; color: #C62828; }

.toast { position: fixed; top: var(--space-lg); left: 50%; transform: translateX(-50%); background: rgba(45,45,45,0.92); color: #fff; padding: 10px 24px; border-radius: var(--radius-full); font-size: 13px; z-index: 9999; pointer-events: none; opacity: 0; transition: opacity 0.25s; max-width: 90%; white-space: nowrap; }
.toast.show { opacity: 1; }

.auth-form { padding: var(--space-lg); max-width: 360px; margin: 0 auto; }
.auth-form h2 { font-size: 22px; font-weight: 700; text-align: center; margin-bottom: var(--space-lg); }
.form-group { margin-bottom: var(--space-md); }
.form-group label { display: block; font-size: 13px; color: var(--color-text-secondary); margin-bottom: 6px; font-weight: 500; }
.form-group input { width: 100%; padding: 11px 14px; border: 1px solid #E0D6CC; border-radius: var(--radius-md); font-size: 14px; outline: none; font-family: inherit; color: var(--color-text); background: var(--color-bg-card); }
.form-group input:focus { border-color: var(--color-primary); box-shadow: 0 0 0 3px rgba(194,59,34,0.1); }
.auth-form .form-toggle { text-align: center; font-size: 13px; color: var(--color-text-secondary); margin-top: var(--space-md); }
.auth-form .form-toggle a { color: var(--color-primary); cursor: pointer; background: none; border: none; font-family: inherit; font-size: 13px; text-decoration: underline; }

.profile-card { background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark)); color: var(--color-text-on-primary); padding: var(--space-xl) var(--space-lg); text-align: center; margin-bottom: var(--space-md); }
.profile-card .profile-name { font-size: 18px; font-weight: 700; }
.profile-card .profile-role { font-size: 12px; opacity: 0.8; margin-top: 2px; }
.profile-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; padding: 0 var(--space-md); margin-bottom: var(--space-md); }
.profile-stat { background: var(--color-bg-card); border-radius: var(--radius-md); padding: 14px; text-align: center; box-shadow: var(--shadow-sm); }
.profile-stat .stat-value { font-size: 20px; font-weight: 700; }
.profile-stat .stat-value.red { color: var(--color-primary); }
.profile-stat .stat-label { font-size: 11px; color: var(--color-text-muted); margin-top: 2px; }
.profile-menu { padding: 0 var(--space-md); }
.profile-menu .menu-group { background: var(--color-bg-card); border-radius: var(--radius-md); box-shadow: var(--shadow-sm); overflow: hidden; margin-bottom: var(--space-md); }
.profile-menu .menu-item { display: flex; align-items: center; gap: 12px; padding: 14px var(--space-md); cursor: pointer; border-bottom: 1px solid #F5F0EB; }
.profile-menu .menu-item:last-child { border-bottom: none; }
.profile-menu .menu-item .menu-icon { font-size: 18px; width: 24px; text-align: center; }
.profile-menu .menu-item .menu-label { flex: 1; font-size: 14px; }
.profile-menu .menu-item .menu-value { font-size: 12px; color: var(--color-text-muted); }
.profile-menu .menu-item .menu-arrow { color: var(--color-text-muted); font-size: 16px; }

.login-prompt { padding: var(--space-xl) var(--space-lg); text-align: center; }

.bottom-nav {
  position: fixed; bottom: 0; left: 0; right: 0; max-width: 480px; margin: 0 auto;
  background: var(--color-bg-card); display: flex; border-top: 1px solid #F0EBE6;
  z-index: 999; height: var(--nav-height); box-shadow: 0 -2px 8px rgba(0,0,0,0.06);
}
.nav-item { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px; cursor: pointer; color: var(--color-text-muted); background: none; border: none; font-family: inherit; font-size: 11px; padding: 8px 0; }
.nav-item .nav-icon { font-size: 22px; line-height: 1; }
.nav-item.active { color: var(--color-primary); }

.empty-state { text-align: center; padding: var(--space-2xl) var(--space-lg); }
.loading-spinner { display: flex; align-items: center; justify-content: center; gap: 8px; padding: var(--space-xl); }
.loading-spinner .spinner { width: 20px; height: 20px; border: 2px solid var(--color-primary-light); border-top-color: var(--color-primary); border-radius: var(--radius-full); animation: spin 0.6s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

.admin-card { background: var(--color-bg-card); border-radius: var(--radius-md); margin: 0 var(--space-md) var(--space-sm); padding: var(--space-md); box-shadow: var(--shadow-sm); }
.admin-card .admin-actions { display: flex; gap: 8px; margin-top: 10px; }
.btn-approve { background: #E8F5E9; color: #2E7D32; border: none; padding: 8px 20px; border-radius: var(--radius-full); font-size: 13px; font-weight: 500; cursor: pointer; font-family: inherit; }
.btn-reject { background: #FFEBEE; color: #C62828; border: none; padding: 8px 20px; border-radius: var(--radius-full); font-size: 13px; font-weight: 500; cursor: pointer; font-family: inherit; }

@media (min-width: 480px) {
  body { border-left: 1px solid #F0EBE6; border-right: 1px solid #F0EBE6; }
}