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

:root {
  --primary: #0a1628;
  --gold: #c9a96e;
  --gold-light: #e8d5a8;
  --white: #ffffff;
  --gray-50: #f8f9fa;
  --gray-100: #f1f3f5;
  --gray-200: #e9ecef;
  --gray-300: #dee2e6;
  --gray-500: #6c757d;
  --gray-700: #495057;
  --gray-900: #212529;
  --success: #28a745;
  --danger: #dc3545;
  --warning: #ffc107;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  background: var(--gray-50);
  color: var(--gray-900);
  line-height: 1.6;
}

/* 顶部导航 */
.navbar {
  background: var(--white);
  border-bottom: 1px solid var(--gray-200);
  padding: 16px 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 100;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--primary);
}

.navbar-brand .logo {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--primary), #1a2a4a);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gold);
  font-weight: bold;
  font-size: 18px;
}

.navbar-brand h1 {
  font-size: 18px;
  font-weight: 600;
}

.navbar-brand span {
  color: var(--gray-500);
  font-size: 14px;
}

.navbar-links {
  display: flex;
  gap: 24px;
}

.navbar-links a {
  color: var(--gray-700);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.2s;
}

.navbar-links a:hover {
  color: var(--gold);
}

/* 主容器 */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 32px;
}

.container-sm {
  max-width: 600px;
  margin: 0 auto;
  padding: 40px 32px;
}

/* 卡片 */
.card {
  background: var(--white);
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
  padding: 32px;
  margin-bottom: 24px;
}

.card-header {
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--gray-200);
}

.card-header h2 {
  font-size: 20px;
  color: var(--primary);
  margin-bottom: 4px;
}

.card-header p {
  color: var(--gray-500);
  font-size: 14px;
}

/* 上传区域 */
.upload-zone {
  border: 2px dashed var(--gray-300);
  border-radius: 12px;
  padding: 60px 40px;
  text-align: center;
  cursor: pointer;
  transition: all 0.3s;
  background: var(--gray-50);
}

.upload-zone:hover, .upload-zone.dragover {
  border-color: var(--gold);
  background: rgba(201, 169, 110, 0.05);
}

.upload-zone .icon {
  font-size: 48px;
  margin-bottom: 16px;
}

.upload-zone h3 {
  font-size: 18px;
  color: var(--primary);
  margin-bottom: 8px;
}

.upload-zone p {
  color: var(--gray-500);
  font-size: 14px;
}

.upload-zone input[type="file"] {
  display: none;
}

/* 文件信息 */
.file-info {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px;
  background: var(--gray-50);
  border-radius: 8px;
  margin-top: 16px;
}

.file-info .file-icon {
  width: 48px;
  height: 48px;
  background: var(--primary);
  color: var(--gold);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: bold;
}

.file-info .file-details {
  flex: 1;
}

.file-info .file-name {
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 4px;
}

.file-info .file-size {
  font-size: 13px;
  color: var(--gray-500);
}

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

.form-group label {
  display: block;
  font-weight: 500;
  color: var(--gray-700);
  margin-bottom: 8px;
  font-size: 14px;
}

.form-group input[type="text"],
.form-group input[type="password"],
.form-group input[type="email"],
.form-group input[type="datetime-local"],
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--gray-300);
  border-radius: 8px;
  font-size: 14px;
  transition: border-color 0.2s;
  background: var(--white);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(201, 169, 110, 0.1);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

/* 复选框 */
.checkbox-group {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.checkbox-group input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--gold);
}

.checkbox-group label {
  font-size: 14px;
  color: var(--gray-700);
  cursor: pointer;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
}

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

.btn-primary:hover {
  background: #1a2a4a;
}

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

.btn-gold:hover {
  background: var(--gold-light);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--gray-300);
  color: var(--gray-700);
}

.btn-outline:hover {
  border-color: var(--gold);
  color: var(--gold);
}

.btn-danger {
  background: var(--danger);
  color: var(--white);
}

.btn-danger:hover {
  background: #c82333;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 12px;
}

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

.btn-block {
  width: 100%;
}

/* 分享链接 */
.share-link {
  display: flex;
  gap: 8px;
  margin-top: 16px;
}

.share-link input {
  flex: 1;
  padding: 10px 14px;
  border: 1px solid var(--gray-300);
  border-radius: 8px;
  font-size: 13px;
  background: var(--gray-50);
}

/* 查看页面 */
.viewer-header {
  background: var(--white);
  padding: 16px 32px;
  border-bottom: 1px solid var(--gray-200);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.viewer-header .doc-title {
  font-weight: 600;
  color: var(--primary);
}

.viewer-container {
  position: relative;
  background: var(--gray-100);
  min-height: calc(100vh - 120px);
  display: flex;
  align-items: center;
  justify-content: center;
}

.viewer-container iframe,
.viewer-container img {
  max-width: 100%;
  max-height: calc(100vh - 160px);
  box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}

/* 水印 */
.watermark {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 9999;
  overflow: hidden;
}

.watermark-item {
  position: absolute;
  color: rgba(0, 0, 0, 0.08);
  font-size: 16px;
  transform: rotate(-30deg);
  white-space: nowrap;
  user-select: none;
}

/* 密码弹窗 */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal {
  background: var(--white);
  border-radius: 12px;
  padding: 32px;
  width: 90%;
  max-width: 400px;
  box-shadow: 0 10px 40px rgba(0,0,0,0.2);
}

.modal h3 {
  color: var(--primary);
  margin-bottom: 16px;
  font-size: 18px;
}

.modal p {
  color: var(--gray-500);
  font-size: 14px;
  margin-bottom: 20px;
}

/* 表格 */
.table {
  width: 100%;
  border-collapse: collapse;
}

.table th,
.table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--gray-200);
}

.table th {
  background: var(--gray-50);
  font-weight: 600;
  color: var(--gray-700);
  font-size: 13px;
}

.table td {
  font-size: 14px;
  color: var(--gray-900);
}

.table tr:hover {
  background: var(--gray-50);
}

/* 统计卡片 */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin-bottom: 32px;
}

.stat-card {
  background: var(--white);
  border-radius: 12px;
  padding: 24px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

.stat-card .stat-value {
  font-size: 32px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 4px;
}

.stat-card .stat-label {
  font-size: 14px;
  color: var(--gray-500);
}

/* 标签 */
.badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
}

.badge-success {
  background: rgba(40, 167, 69, 0.1);
  color: var(--success);
}

.badge-warning {
  background: rgba(255, 193, 7, 0.1);
  color: #856404;
}

.badge-danger {
  background: rgba(220, 53, 69, 0.1);
  color: var(--danger);
}

.badge-info {
  background: rgba(108, 117, 125, 0.1);
  color: var(--gray-500);
}

/* 提示消息 */
.alert {
  padding: 12px 16px;
  border-radius: 8px;
  margin-bottom: 16px;
  font-size: 14px;
}

.alert-success {
  background: rgba(40, 167, 69, 0.1);
  color: var(--success);
  border: 1px solid rgba(40, 167, 69, 0.2);
}

.alert-error {
  background: rgba(220, 53, 69, 0.1);
  color: var(--danger);
  border: 1px solid rgba(220, 53, 69, 0.2);
}

.alert-info {
  background: rgba(108, 117, 125, 0.1);
  color: var(--gray-700);
  border: 1px solid rgba(108, 117, 125, 0.2);
}

/* 加载动画 */
.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--gray-300);
  border-top-color: var(--gold);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* 空状态 */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--gray-500);
}

.empty-state .icon {
  font-size: 48px;
  margin-bottom: 16px;
}

.empty-state h3 {
  font-size: 18px;
  color: var(--gray-700);
  margin-bottom: 8px;
}

/* 响应式 */
@media (max-width: 768px) {
  .navbar { padding: 12px 16px; }
  .container { padding: 20px 16px; }
  .container-sm { padding: 20px 16px; }
  .card { padding: 20px; }
  .form-row { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr; }
  .navbar-links { display: none; }
}