/* ===== Daosage 化工资源平台 样式 ===== */
:root {
  --primary: #1a5fb4;
  --primary-dark: #14488a;
  --primary-light: #3584e4;
  --accent: #26a269;
  --danger: #c01c28;
  --warning: #e5a50a;
  --bg: #f5f7fa;
  --card-bg: #ffffff;
  --text: #1a1a2e;
  --text-secondary: #6c757d;
  --border: #dee2e6;
  --shadow: 0 2px 12px rgba(26,95,180,0.1);
  --radius: 10px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

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

/* ===== 导航栏 ===== */
.navbar {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
  padding: 0 24px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}

.navbar .logo {
  font-size: 22px;
  font-weight: 700;
  color: #fff;
  letter-spacing: 1px;
}

.navbar .logo span.dao { color: #f5a623; } /* 金黄色 */
.navbar .logo span.sage { color: #ffffff; } /* 白色 */

.navbar .nav-links { display: flex; gap: 8px; align-items: center; }

.navbar .nav-links a,
.navbar .nav-links .btn-nav {
  color: rgba(255,255,255,0.9);
  padding: 6px 14px;
  border-radius: 6px;
  font-size: 14px;
  transition: all 0.2s;
  cursor: pointer;
  border: none;
  background: transparent;
}

.navbar .nav-links a:hover,
.navbar .nav-links .btn-nav:hover {
  background: rgba(255,255,255,0.15);
  color: #fff;
}

.navbar .user-info {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
}

.navbar .user-info .level-badge {
  background: rgba(255,255,255,0.2);
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 12px;
}

/* ===== 容器 ===== */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.container-sm { max-width: 480px; margin: 0 auto; padding: 0 20px; }

/* ===== 页面标题 ===== */
.page-header {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
  padding: 32px 20px;
  text-align: center;
  margin-bottom: 32px;
}

.page-header h1 { font-size: 28px; font-weight: 700; margin-bottom: 8px; }
.page-header p { opacity: 0.85; font-size: 15px; }

/* ===== 搜索栏 ===== */
.search-section {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  padding: 40px 20px 32px;
  text-align: center;
}

.search-section h2 { color: #fff; font-size: 26px; margin-bottom: 20px; }

.search-box {
  display: flex;
  max-width: 600px;
  margin: 0 auto;
  background: #fff;
  border-radius: 50px;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}

.search-box input {
  flex: 1;
  border: none;
  outline: none;
  padding: 14px 20px;
  font-size: 15px;
  border-radius: 50px 0 0 50px;
}

.search-box button {
  background: var(--primary);
  color: #fff;
  border: none;
  padding: 14px 28px;
  font-size: 15px;
  cursor: pointer;
  border-radius: 0 50px 50px 0;
  transition: background 0.2s;
}

.search-box button:hover { background: var(--primary-dark); }

/* ===== 分类导航 ===== */
.categories-section { padding: 32px 0; }

.categories-section h3 {
  font-size: 18px;
  color: var(--text);
  margin-bottom: 16px;
  text-align: center;
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}

.category-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 24px 16px;
  text-align: center;
  cursor: pointer;
  transition: all 0.25s;
  border: 2px solid transparent;
  box-shadow: var(--shadow);
}

.category-card:hover {
  border-color: var(--primary);
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(26,95,180,0.15);
}

.category-card .cat-icon {
  font-size: 36px;
  margin-bottom: 10px;
  display: block;
}

.category-card .cat-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}

.category-card .cat-count {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* ===== 会员Banner ===== */
.member-banner {
  background: linear-gradient(135deg, #1a5fb4 0%, #0d47a1 100%);
  border-radius: var(--radius);
  padding: 24px 32px;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 24px 0;
  box-shadow: var(--shadow);
}

.member-banner .banner-left h3 {
  font-size: 18px;
  margin-bottom: 4px;
}

.member-banner .banner-left p {
  opacity: 0.8;
  font-size: 14px;
}

.member-banner .banner-right {
  text-align: right;
}

.member-banner .quota-display {
  font-size: 32px;
  font-weight: 700;
}

.member-banner .quota-label {
  font-size: 13px;
  opacity: 0.8;
}

.banner-btn {
  background: rgba(255,255,255,0.2);
  color: #fff;
  border: 1px solid rgba(255,255,255,0.3);
  padding: 8px 20px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
  transition: all 0.2s;
}

.banner-btn:hover {
  background: rgba(255,255,255,0.3);
}

/* ===== 资源卡片 ===== */
.section-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.section-title a { font-size: 14px; font-weight: 500; color: var(--primary); }

.resources-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.resource-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  transition: all 0.25s;
  border: 1px solid transparent;
  cursor: pointer;
}

.resource-card:hover {
  border-color: var(--primary-light);
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(26,95,180,0.15);
}

.resource-card .resource-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 10px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.resource-card .resource-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 10px;
}

.resource-card .resource-meta .cat-tag {
  background: #e8f0fe;
  color: var(--primary);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 11px;
}

.level-tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
}

.level-tag.free { background: #e6f4ea; color: #1e7e34; }
.level-tag.vip { background: #fff3e0; color: #e65100; }
.level-tag.interest { background: #e3f2fd; color: #1565c0; }
.level-tag.iron { background: #fce4ec; color: #c62828; }

.resource-card .resource-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: var(--text-secondary);
}

.resource-card .file-size { display: flex; align-items: center; gap: 4px; }

.vip-lock {
  background: #fff8e1;
  border: 1px solid #ffe082;
  border-radius: 6px;
  padding: 8px 12px;
  text-align: center;
  font-size: 12px;
  color: #e65100;
  margin-top: 10px;
}

/* ===== 表单 ===== */
.form-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 40px;
  box-shadow: var(--shadow);
  margin: 40px auto;
  max-width: 420px;
}

.form-card h2 {
  text-align: center;
  font-size: 24px;
  color: var(--primary);
  margin-bottom: 8px;
}

.form-card .subtitle {
  text-align: center;
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 28px;
}

.form-group { margin-bottom: 20px; }

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 6px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 11px 14px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  transition: border-color 0.2s;
  outline: none;
  font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--primary);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 11px 24px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.2s;
  text-decoration: none;
}

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

.btn-primary:hover { background: var(--primary-dark); }

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 1.5px solid var(--primary);
}

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

.btn-block { width: 100%; }

.btn:disabled { opacity: 0.6; cursor: not-allowed; }

.form-footer {
  text-align: center;
  margin-top: 20px;
  font-size: 14px;
  color: var(--text-secondary);
}

/* ===== 个人中心 ===== */
.member-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 24px;
  padding: 32px 0;
}

.member-sidebar {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  height: fit-content;
}

.member-sidebar .user-card {
  text-align: center;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 20px;
}

.member-sidebar .user-avatar {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  font-weight: 700;
  margin: 0 auto 12px;
}

.member-sidebar .user-nickname {
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
}

.member-sidebar .user-level {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 4px;
}

.sidebar-nav { display: flex; flex-direction: column; gap: 4px; }

.sidebar-nav a {
  display: block;
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 14px;
  color: var(--text);
  transition: all 0.2s;
}

.sidebar-nav a:hover,
.sidebar-nav a.active {
  background: #e8f0fe;
  color: var(--primary);
}

.member-main {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
}

.quota-card {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  border-radius: var(--radius);
  padding: 24px;
  color: #fff;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.quota-card .quota-num {
  font-size: 40px;
  font-weight: 700;
}

.quota-card .quota-info h4 { font-size: 16px; margin-bottom: 4px; }
.quota-card .quota-info p { opacity: 0.8; font-size: 13px; }

.stats-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--bg);
  border-radius: 8px;
  padding: 16px;
  text-align: center;
}

.stat-card .stat-num {
  font-size: 24px;
  font-weight: 700;
  color: var(--primary);
}

.stat-card .stat-label {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* ===== 资源列表页 ===== */
.resources-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 24px;
  padding: 32px 0;
}

.filter-sidebar {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  height: fit-content;
}

.filter-sidebar h4 {
  font-size: 15px;
  color: var(--text);
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

.filter-list { display: flex; flex-direction: column; gap: 4px; }

.filter-list a {
  display: block;
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 14px;
  color: var(--text);
  transition: all 0.2s;
}

.filter-list a:hover,
.filter-list a.active {
  background: #e8f0fe;
  color: var(--primary);
}

.filter-list a.active { font-weight: 600; }

.resources-main {}

.resources-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 16px 20px;
  box-shadow: var(--shadow);
}

.search-inline {
  display: flex;
  gap: 10px;
  flex: 1;
  max-width: 400px;
}

.search-inline input {
  flex: 1;
  padding: 8px 14px;
  border: 1.5px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
  outline: none;
}

.search-inline input:focus { border-color: var(--primary); }

.pagination { display: flex; gap: 6px; align-items: center; }

.pagination button {
  padding: 6px 12px;
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
  transition: all 0.2s;
}

.pagination button:hover:not(:disabled) {
  border-color: var(--primary);
  color: var(--primary);
}

.pagination button.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.pagination button:disabled { opacity: 0.5; cursor: not-allowed; }

.pagination .page-info {
  font-size: 13px;
  color: var(--text-secondary);
  padding: 0 8px;
}

/* ===== 资源详情页 ===== */
.resource-detail {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow);
  margin: 32px auto;
  max-width: 800px;
}

.resource-detail .detail-header {
  border-bottom: 1px solid var(--border);
  padding-bottom: 20px;
  margin-bottom: 20px;
}

.resource-detail h1 {
  font-size: 24px;
  color: var(--text);
  margin-bottom: 12px;
  line-height: 1.4;
}

.detail-tags { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 12px; }

.detail-meta {
  display: flex;
  gap: 20px;
  font-size: 13px;
  color: var(--text-secondary);
}

.detail-meta span { display: flex; align-items: center; gap: 4px; }

.resource-content {
  padding: 24px 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text);
}

.download-actions {
  background: var(--bg);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.download-actions .btn {
  font-size: 16px;
  padding: 14px 32px;
}

.vip-upgrade-tip {
  background: #fff8e1;
  border: 1px solid #ffe082;
  border-radius: 8px;
  padding: 16px;
  font-size: 14px;
  color: #e65100;
  text-align: center;
}

/* ===== 空状态 ===== */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-secondary);
}

.empty-state .empty-icon { font-size: 56px; margin-bottom: 16px; }
.empty-state h3 { font-size: 18px; color: var(--text); margin-bottom: 8px; }
.empty-state p { font-size: 14px; }

/* ===== Toast ===== */
.toast-container {
  position: fixed;
  top: 80px;
  right: 20px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  background: #fff;
  border-radius: 8px;
  padding: 12px 20px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.15);
  font-size: 14px;
  min-width: 240px;
  max-width: 360px;
  animation: slideIn 0.3s ease;
}

.toast.success { border-left: 4px solid var(--accent); }
.toast.error { border-left: 4px solid var(--danger); }
.toast.info { border-left: 4px solid var(--primary); }

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* ===== Loading ===== */
.loading-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(255,255,255,0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9998;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* ===== 列表 ===== */
.list-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}

.list-item:last-child { border-bottom: none; }

.list-item .item-title {
  font-size: 14px;
  color: var(--text);
  font-weight: 500;
}

.list-item .item-meta {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 2px;
}

.list-item .item-actions { display: flex; gap: 8px; }

.btn-sm {
  padding: 5px 12px;
  font-size: 12px;
  border-radius: 6px;
  cursor: pointer;
  border: none;
  transition: all 0.2s;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .resources-grid { grid-template-columns: repeat(3, 1fr); }
  .category-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
  .resources-grid { grid-template-columns: repeat(2, 1fr); }
  .category-grid { grid-template-columns: repeat(2, 1fr); }
  .member-layout { grid-template-columns: 1fr; }
  .resources-layout { grid-template-columns: 1fr; }
  .filter-sidebar { display: none; }
  .navbar .nav-links span { display: none; }
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .member-banner { flex-direction: column; gap: 16px; text-align: center; }
  .member-banner .banner-right { text-align: center; }
}

@media (max-width: 480px) {
  .resources-grid { grid-template-columns: 1fr; }
  .category-grid { grid-template-columns: repeat(2, 1fr); }
  .form-card { padding: 24px 20px; margin: 20px auto; }
}

/* ===== 分隔线 ===== */
.divider { height: 1px; background: var(--border); margin: 24px 0; }

/* ===== 首页简洁资源列表 ===== */
.resources-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  background: #fff;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}

.resource-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  border-bottom: 1px solid #f0f0f0;
  cursor: pointer;
  transition: background 0.15s;
}

.resource-row:last-child { border-bottom: none; }

.resource-row:hover { background: #f8f9ff; }

.resource-row-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: #333;
  font-weight: 500;
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.cat-dot { font-size: 14px; flex-shrink: 0; }

.resource-row-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
  margin-left: 16px;
}

.file-size-sm {
  font-size: 12px;
  color: #999;
}

.cat-tag {
  background: #e8f0fe;
  color: #1a5fb4;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 12px;
}

.level-tag.vip {
  background: #fff3e0;
  color: #e65100;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 12px;
}