/* ===== 升途教盟学习规划师 - 样式 ===== */

:root {
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --primary-light: #eef2ff;
  --primary-border: #c7d2fe;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --bg-page: #f3f4f6;
  --bg-card: #ffffff;
  --bg-hover: #f9fafb;
  --text-primary: #111827;
  --text-secondary: #6b7280;
  --text-tertiary: #9ca3af;
  --border: #e5e7eb;
  --border-strong: #d1d5db;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
  --transition: 0.2s ease;
}

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

html, body {
  height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 14px;
  color: var(--text-primary);
  background: var(--bg-page);
}

#app { display:flex; flex-direction:column; height:100vh; }

/* ===== 页脚 ===== */
.site-footer {
  text-align: center;
  padding: 10px 16px;
  font-size: 12px;
  color: var(--text-tertiary);
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}
.site-footer a {
  color: var(--text-tertiary);
  text-decoration: none;
}
.site-footer a:hover {
  color: var(--primary);
}

/* ===== 页头 ===== */
.top-header {
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:0 24px;
  height:60px;
  background: var(--bg-card);
  border-bottom:1px solid var(--border);
  box-shadow: var(--shadow-sm);
  z-index:10;
}

.header-brand {
  display:flex;
  align-items:center;
  gap:12px;
}

.brand-logo {
  width: 40px;
  height: 40px;
  object-fit: contain;
  border-radius: var(--radius-sm);
}

.brand-text h1 {
  font-size:18px;
  font-weight:700;
  color: var(--text-primary);
  line-height:1.2;
}

.brand-sub {
  font-size:11px;
  color: var(--text-tertiary);
  letter-spacing:0.5px;
}

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

.btn-outline {
  padding:8px 16px;
  background:none;
  border:1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size:13px;
  cursor:pointer;
  color: var(--text-secondary);
  display:flex;
  align-items:center;
  gap:4px;
  transition: var(--transition);
  font-family:inherit;
}
.btn-outline:hover { background:var(--bg-hover); border-color:var(--border-strong); }

/* ===== 主布局 ===== */
.main-container {
  flex:1;
  display:flex;
  overflow:hidden;
}

/* ===== 左侧输入面板 ===== */
.input-panel {
  width:460px;
  min-width:460px;
  background: var(--bg-card);
  border-right:1px solid var(--border);
  display:flex;
  flex-direction:column;
  transition: var(--transition);
  overflow:hidden;
}

.input-panel.collapsed { margin-left:-460px; }

.panel-header {
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:16px 20px;
  border-bottom:1px solid var(--border);
}
.panel-header h2 { font-size:16px; font-weight:600; }

.btn-toggle-panel {
  background:none; border:none; color:var(--text-tertiary); cursor:pointer;
  padding:4px; border-radius:4px; transition:var(--transition);
}
.btn-toggle-panel:hover { color:var(--text-primary); background:var(--bg-hover); }

.student-form {
  flex:1;
  overflow-y:auto;
  padding:16px 20px 24px;
}

.student-form::-webkit-scrollbar { width:4px; }
.student-form::-webkit-scrollbar-thumb { background:var(--border-strong); border-radius:2px; }

/* 表单区块 */
.form-section { margin-bottom:20px; }
.section-title {
  font-size:14px;
  font-weight:700;
  color: var(--primary);
  margin-bottom:12px;
  padding-bottom:8px;
  border-bottom:2px solid var(--primary-light);
  display:flex;
  align-items:center;
  gap:6px;
}
.section-title .hint { font-size:12px; color:var(--text-tertiary); font-weight:400; }

.form-group { margin-bottom:12px; }
.form-group label { display:block; font-size:13px; font-weight:600; color:var(--text-primary); margin-bottom:4px; }
.form-group .required { color:var(--danger); }
.form-group .hint { font-size:12px; color:var(--text-tertiary); font-weight:400; }

.form-row { display:flex; gap:12px; }
.form-row .form-group { flex:1; }

input[type="text"], input[type="password"], select, textarea {
  width:100%;
  padding:9px 12px;
  border:1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size:13px;
  color: var(--text-primary);
  background: var(--bg-card);
  font-family:inherit;
  outline:none;
  transition: var(--transition);
}

/* 姓名输入 + 历史记录下拉 */
.name-input-wrapper { position:relative; }
.name-suggestions {
  position:absolute;
  top:100%;
  left:0; right:0;
  background:var(--bg-card);
  border:1px solid var(--border);
  border-top:none;
  border-radius:0 0 var(--radius-sm) var(--radius-sm);
  box-shadow:var(--shadow-md);
  max-height:240px;
  overflow-y:auto;
  z-index:50;
}
.name-suggestion-item {
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:9px 12px;
  cursor:pointer;
  transition:var(--transition);
  border-bottom:1px solid var(--bg-hover);
}
.name-suggestion-item:last-child { border-bottom:none; }
.name-suggestion-item:hover { background:var(--primary-light); }
.name-suggestion-item.active { background:var(--primary-light); }
.name-suggestion-info { display:flex; flex-direction:column; gap:2px; }
.name-suggestion-name { font-size:13px; font-weight:600; color:var(--text-primary); }
.name-suggestion-meta { font-size:11px; color:var(--text-tertiary); }
.name-suggestion-delete {
  background:none; border:none; color:var(--text-tertiary);
  cursor:pointer; font-size:14px; padding:2px 6px; border-radius:4px;
  transition:var(--transition); font-family:inherit;
}
.name-suggestion-delete:hover { color:var(--danger); background:rgba(239,68,68,0.08); }
.name-suggestions-empty {
  padding:12px; text-align:center; font-size:12px; color:var(--text-tertiary);
}
input:focus, select:focus, textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}
textarea { resize:vertical; line-height:1.5; }
select { cursor:pointer; }
::placeholder { color:var(--text-tertiary); }

/* 学科选择 */
.subject-grid {
  display:grid;
  grid-template-columns:repeat(3, 1fr);
  gap:6px;
}
.subject-tag {
  padding:8px;
  text-align:center;
  border:2px solid var(--border);
  border-radius: var(--radius-sm);
  font-size:13px;
  cursor:pointer;
  transition:var(--transition);
  font-weight:500;
  background:var(--bg-card);
  color:var(--text-secondary);
}
.subject-tag:hover { border-color:var(--primary-border); background:var(--primary-light); }
.subject-tag.selected { border-color:var(--primary); background:var(--primary-light); color:var(--primary); font-weight:600; }

/* 文档类型选择 */
.doc-type-grid {
  display:flex;
  flex-direction:column;
  gap:6px;
}
.doc-type-card {
  display:flex;
  align-items:center;
  gap:10px;
  padding:12px 14px;
  border:2px solid var(--border);
  border-radius: var(--radius-md);
  cursor:pointer;
  transition:var(--transition);
  background:var(--bg-card);
}
.doc-type-card:hover { border-color:var(--primary-border); background:var(--primary-light); }
.doc-type-card.selected { border-color:var(--primary); background:var(--primary-light); }
.doc-type-icon { font-size:22px; flex-shrink:0; }
.doc-type-name { font-size:14px; font-weight:600; color:var(--text-primary); }
.doc-type-desc { font-size:12px; color:var(--text-secondary); margin-left:auto; }

/* 课时选择 */
.hours-grid {
  display:flex;
  gap:10px;
}
.hours-card {
  flex:1;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:2px;
  padding:14px 8px;
  border:2px solid var(--border);
  border-radius: var(--radius-md);
  cursor:pointer;
  transition:var(--transition);
  background:var(--bg-card);
  text-align:center;
}
.hours-card:hover { border-color:var(--primary-border); background:var(--primary-light); }
.hours-card.selected { border-color:var(--primary); background:var(--primary-light); }
.hours-num { font-size:22px; font-weight:700; color:var(--primary); }
.hours-unit { font-size:12px; color:var(--text-secondary); white-space:nowrap; }

/* 智能规划卡片 */
.hours-card.auto {
  flex:1.6;
  border-style:dashed;
  border-color:var(--primary-border);
  background: linear-gradient(135deg, var(--primary-light), #eef6ff);
}
.hours-card.auto .hours-num {
  font-size:15px;
  font-weight:700;
  color:var(--primary);
  white-space:nowrap;
}
.hours-card.auto .hours-unit {
  font-size:11px;
  white-space:nowrap;
}
.hours-card.auto:hover {
  border-color:var(--primary);
  background: linear-gradient(135deg, #e0edff, #d6e8ff);
}
.hours-card.auto.selected {
  border-style:solid;
  border-color:var(--primary);
  background: linear-gradient(135deg, var(--primary-light), #ddeeff);
}

/* 试卷上传 */
.paper-upload-area {
  border:2px dashed var(--primary-border);
  border-radius: var(--radius-md);
  padding:24px;
  text-align:center;
  cursor:pointer;
  transition: var(--transition);
  background:var(--bg-card);
  min-height:120px;
  display:flex;
  align-items:center;
  justify-content:center;
}
.paper-upload-area:hover {
  border-color:var(--primary);
  background:var(--primary-light);
}

.upload-placeholder {
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:6px;
}
.upload-icon { font-size:36px; }
.upload-placeholder p { font-size:14px; color:var(--text-secondary); margin:0; }
.upload-hint { font-size:12px; color:var(--text-tertiary); }

.upload-preview {
  position:relative;
  max-width:100%;
}
.upload-preview img {
  max-width:100%;
  max-height:200px;
  border-radius:var(--radius-sm);
  border:1px solid var(--border);
}

/* 多图预览网格 */
.upload-previews {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  width: 100%;
}
.upload-previews.hidden { display: none !important; }
.preview-item {
  position: relative;
  aspect-ratio: 1;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg-hover);
}
.preview-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.btn-remove-file {
  position:absolute;
  top:4px;
  right:4px;
  background:var(--danger);
  color:white;
  border:none;
  border-radius:4px;
  padding:3px 8px;
  font-size:11px;
  cursor:pointer;
  font-family:inherit;
  z-index: 2;
}

.upload-count {
  margin-top: 8px;
  font-size: 12px;
  color: var(--text-secondary);
  text-align: center;
}

/* 空状态 logo */
.empty-logo {
  width: 80px;
  height: 80px;
  object-fit: contain;
  margin-bottom: 16px;
  border-radius: var(--radius-md);
}

/* 生成按钮 */
.btn-generate {
  width:100%;
  padding:14px;
  background: linear-gradient(135deg, var(--primary), var(--primary-hover));
  color:white;
  border:none;
  border-radius: var(--radius-md);
  font-size:15px;
  font-weight:700;
  cursor:pointer;
  transition:var(--transition);
  display:flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  box-shadow: var(--shadow-md);
  margin-top:12px;
  font-family:inherit;
}
.btn-generate:hover { transform:translateY(-1px); box-shadow: var(--shadow-lg); }
.btn-generate:disabled { opacity:0.6; cursor:not-allowed; transform:none; }
.btn-generate .btn-icon-text { font-size:18px; }

/* ===== 右侧预览区 ===== */
.preview-panel {
  flex:1;
  display:flex;
  flex-direction:column;
  min-width:0;
  background:var(--bg-page);
  position: relative;
}

/* 预览区全屏水印（使用去文字的图标版 logo） */
.preview-panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  height: 100%;
  background-image: url("logo-icon.png");
  background-size: 520px auto;
  background-repeat: no-repeat;
  background-position: center;
  opacity: 0.05;
  filter: grayscale(100%);
  pointer-events: none;
  z-index: 0;
}

.preview-panel > * {
  position: relative;
  z-index: 1;
}

.preview-toolbar {
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:10px 24px;
  background:var(--bg-card);
  border-bottom:1px solid var(--border);
}

.preview-status { display:flex; align-items:center; gap:8px; }
.status-dot {
  width:8px; height:8px; border-radius:50%;
}
.status-dot.idle { background:var(--text-tertiary); }
.status-dot.generating { background:var(--warning); animation:pulse 1.5s infinite; }
.status-dot.done { background:var(--success); }
@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:0.3} }
.status-text { font-size:13px; color:var(--text-secondary); }

.toolbar-actions { display:flex; gap:6px; }
.btn-toolbar {
  padding:6px 14px;
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius-sm);
  font-size:13px;
  cursor:pointer;
  transition:var(--transition);
  color:var(--text-secondary);
  font-family:inherit;
}
.btn-toolbar:hover { background:var(--bg-hover); border-color:var(--border-strong); }

/* 文档内容 */
.preview-content {
  flex:1;
  overflow-y:auto;
  padding:32px 48px;
}

.preview-content::-webkit-scrollbar { width:6px; }
.preview-content::-webkit-scrollbar-thumb { background:var(--border-strong); border-radius:3px; }

/* 空状态 */
.empty-state {
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  height:100%;
  text-align:center;
  padding:40px;
}
.empty-icon { font-size:56px; margin-bottom:16px; }
.empty-state h2 {
  font-size:22px;
  font-weight:700;
  color:var(--text-primary);
  margin-bottom:4px;
}
.empty-state p { color:var(--text-secondary); margin-bottom:24px; font-size:14px; }

.feature-list {
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  gap:8px 16px;
  margin-bottom:24px;
}
.feature-item { display:flex; align-items:center; gap:6px; font-size:13px; color:var(--text-secondary); }
.feature-icon { font-size:16px; }
.empty-hint { font-size:13px; color:var(--text-tertiary); max-width:360px; }

/* 文档渲染样式 */
.document-render {
  max-width:800px;
  margin:0 auto;
  background:#fff;
  padding:48px 56px;
  border-radius:var(--radius-lg);
  box-shadow: 0 2px 16px rgba(0,0,0,0.08);
  line-height:1.85;
  font-size:15px;
  color:#1a1a2e;
}

/* 文档主标题 */
.document-render h1 {
  font-size:26px;
  font-weight:800;
  color:#1a1a2e;
  text-align:center;
  margin-bottom:24px;
  padding-bottom:20px;
  border-bottom:3px solid var(--primary);
  letter-spacing:1px;
}

/* 学生信息表（文档头部2列表格） */
.document-render h1 + table,
.document-render h1 ~ table:first-of-type {
  width:100%;
  border-collapse:collapse;
  margin:0 0 32px;
  font-size:14px;
  border:none;
}
.document-render h1 + table td,
.document-render h1 ~ table:first-of-type td,
.document-render h1 + table th,
.document-render h1 ~ table:first-of-type th {
  padding:10px 16px;
  border:none;
  border-bottom:1px solid #f0f0f0;
}
.document-render h1 + table td:first-child,
.document-render h1 ~ table:first-of-type td:first-child,
.document-render h1 + table th:first-child,
.document-render h1 ~ table:first-of-type th:first-child {
  color:var(--text-secondary);
  font-weight:500;
  width:120px;
  background:transparent;
}
.document-render h1 + table td:last-child,
.document-render h1 ~ table:first-of-type td:last-child {
  font-weight:600;
  color:#1a1a2e;
}
.document-render h2 {
  font-size:20px;
  font-weight:700;
  color:var(--primary);
  margin:32px 0 12px;
  padding-bottom:8px;
  border-bottom:2px solid var(--primary-light);
}
.document-render h3 {
  font-size:17px;
  font-weight:700;
  color:var(--text-primary);
  margin:24px 0 8px;
}
.document-render h4 {
  font-size:15px;
  font-weight:600;
  color:var(--text-primary);
  margin:16px 0 6px;
}

.document-render p { margin-bottom:10px; text-align:justify; }

.document-render ul, .document-render ol {
  margin:8px 0 12px 24px;
}
.document-render li { margin-bottom:4px; }

.document-render strong { color:var(--primary); font-weight:700; }
.document-render em { color:var(--text-secondary); }
.document-render .doc-highlight {
  color:#c0392b;
  font-weight:700;
  background:linear-gradient(transparent 60%, #fff3cd 60%);
  padding:0 2px;
}

.document-render table {
  width:100%;
  border-collapse:collapse;
  margin:12px 0 20px;
  font-size:13px;
}
.document-render th {
  background:var(--primary-light);
  color:var(--primary);
  font-weight:600;
  padding:10px 12px;
  text-align:left;
  border:1px solid var(--primary-border);
}
.document-render td {
  padding:8px 12px;
  border:1px solid var(--border);
  color:var(--text-primary);
}
.document-render tr:nth-child(even) td { background:var(--bg-hover); }

.document-render hr {
  margin:24px 0;
  border:none;
  border-top:1px solid var(--border);
}

.document-render code {
  background:var(--bg-hover);
  padding:2px 6px;
  border-radius:4px;
  font-size:13px;
  font-family:"JetBrains Mono","Consolas",monospace;
}

.document-render pre {
  background:#1e1e2e;
  color:#e0e0e0;
  padding:16px;
  border-radius:var(--radius-md);
  overflow-x:auto;
  margin:12px 0;
  font-size:13px;
}

.document-render blockquote {
  border-left:4px solid var(--primary);
  background:#f8f9ff;
  margin:32px 0 0;
  padding:16px 20px;
  color:var(--text-secondary);
  border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  font-size:14px;
  line-height:1.9;
}

/* 文档尾部署名 blockquote（最后一个元素） */
.document-render blockquote:last-child {
  border-left-color:var(--primary);
  background:linear-gradient(135deg, #f8f9ff 0%, #eef2ff 100%);
  border-top:1px solid var(--primary-border);
  border-bottom:1px solid var(--primary-border);
  border-right:1px solid var(--primary-border);
}

/* 打印样式 */
@media print {
  body { background:#fff; }
  .top-header, .input-panel, .preview-toolbar, .generating-indicator, .mobile-tab-bar { display:none !important; }
  .preview-panel { width:100%; overflow:visible; }
  .preview-content { padding:0; overflow:visible; }
  .document-render {
    box-shadow:none;
    border-radius:0;
    padding:0;
    max-width:100%;
    background:#fff;
  }
  .document-render h1 { font-size:22px; }
  .document-render h2 { font-size:18px; }
}

/* 生成中指示器 */
.generating-indicator {
  display:flex;
  align-items:center;
  gap:10px;
  padding:16px 24px;
}
.generating-dots { display:flex; gap:4px; }
.generating-dots span {
  width:8px; height:8px;
  border-radius:50%;
  background:var(--primary);
  animation: typing 1.2s infinite;
}
.generating-dots span:nth-child(2) { animation-delay:0.2s; }
.generating-dots span:nth-child(3) { animation-delay:0.4s; }
@keyframes typing { 0%,60%,100%{transform:translateY(0);opacity:0.4} 30%{transform:translateY(-6px);opacity:1} }
.generating-indicator span { font-size:13px; color:var(--text-secondary); }

.hidden { display:none !important; }

/* 移动端Tab栏（默认隐藏，仅手机端显示） */
.mobile-tab-bar { display:none; }

/* ===== 设置弹窗 ===== */
.modal-overlay {
  position:fixed; inset:0;
  background:rgba(0,0,0,0.4);
  display:none;
  align-items:center;
  justify-content:center;
  z-index:1000;
}
.modal-overlay.show { display:flex; }

.modal {
  background:var(--bg-card);
  border-radius:var(--radius-lg);
  width:90%;
  max-width:480px;
  box-shadow:var(--shadow-lg);
  animation:slideUp 0.3s ease;
}
@keyframes slideUp { from{opacity:0;transform:translateY(20px)} to{opacity:1;transform:translateY(0)} }

.modal-header {
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:20px 24px;
  border-bottom:1px solid var(--border);
}
.modal-header h2 { font-size:18px; font-weight:700; }

.btn-close {
  background:none; border:none; font-size:18px;
  color:var(--text-tertiary); cursor:pointer; padding:4px;
  transition:var(--transition);
}
.btn-close:hover { color:var(--text-primary); }

.modal-body { padding:24px; }
.setting-group { margin-bottom:16px; }
.setting-group label { display:block; font-size:13px; font-weight:600; margin-bottom:4px; }
.setting-group input, .setting-group select {
  width:100%;
  padding:9px 12px;
  border:1px solid var(--border);
  border-radius:var(--radius-sm);
  font-size:13px;
  font-family:inherit;
  outline:none;
  transition:var(--transition);
}
.setting-group input:focus, .setting-group select:focus {
  border-color:var(--primary);
  box-shadow:0 0 0 3px var(--primary-light);
}
.setting-hint { display:block; font-size:12px; color:var(--text-tertiary); margin-top:4px; }

.modal-footer {
  display:flex; justify-content:flex-end; gap:12px;
  padding:16px 24px; border-top:1px solid var(--border);
}

.btn-primary, .btn-secondary {
  padding:10px 20px;
  border:none;
  border-radius:var(--radius-sm);
  font-size:14px;
  font-weight:600;
  cursor:pointer;
  font-family:inherit;
  transition:var(--transition);
}
.btn-primary { background:var(--primary); color:white; }
.btn-primary:hover { background:var(--primary-hover); }
.btn-secondary { background:var(--bg-hover); color:var(--text-primary); border:1px solid var(--border); }
.btn-secondary:hover { background:var(--bg-page); }

/* 关闭生成按钮 */
.btn-stop {
  background:var(--danger);
  color:white;
  border:none;
  border-radius:var(--radius-sm);
  padding:8px 16px;
  font-size:13px;
  cursor:pointer;
  display:flex;
  align-items:center;
  gap:4px;
  font-family:inherit;
}

/* ===== 响应式 ===== */

/* 平板 */
@media (max-width:1024px) {
  .input-panel { width:380px; min-width:380px; }
  .input-panel.collapsed { margin-left:-380px; }
  .preview-content { padding:20px; }
  .document-render { padding:24px; }
}

/* 手机 */
@media (max-width:768px) {
  /* ===== 基础布局 ===== */
  #app {
    height:100vh;
    height:100dvh;
  }

  /* 头部紧凑化 */
  .top-header { padding:0 12px; height:50px; }
  .brand-logo { width:30px; height:30px; }
  .brand-text h1 { font-size:14px; }
  .brand-sub { display:none; }
  .header-actions .btn-outline { padding:6px 10px; font-size:18px; }
  .header-actions .btn-text { display:none; }

  /* 主布局改为Tab切换 */
  .main-container { flex-direction:column; }
  .input-panel {
    width:100%; min-width:0;
    border-right:none;
    border-bottom:1px solid var(--border);
  }
  .input-panel.mobile-hidden { display:none; }
  .preview-panel { display:none; }
  .preview-panel.mobile-show { display:flex; }
  .input-panel.collapsed { margin-left:0; }

  /* 面板头部 */
  .panel-header { padding:12px 16px; }
  .panel-header h2 { font-size:15px; }
  .btn-toggle-panel { display:none; }

  /* 表单滚动区域 */
  .student-form {
    padding:12px 16px 100px;
    -webkit-overflow-scrolling:touch;
  }

  /* 表单区块 */
  .form-section { margin-bottom:16px; }
  .section-title { font-size:13px; margin-bottom:10px; }
  .form-group { margin-bottom:10px; }
  .form-group label { font-size:12px; }

  /* 输入框增大触摸区域 */
  input[type="text"], input[type="password"], select, textarea {
    padding:11px 14px;
    font-size:14px; /* >=16px防止iOS缩放，14px也可接受 */
  }

  /* 表单行堆叠 */
  .form-row { flex-direction:column; gap:0; }

  /* 学科网格3列紧凑 */
  .subject-grid {
    grid-template-columns:repeat(3,1fr);
    gap:8px;
  }
  .subject-tag { padding:10px 4px; font-size:12px; }

  /* 文档类型卡片 */
  .doc-type-grid { gap:8px; }
  .doc-type-card { padding:10px 12px; }
  .doc-type-desc { display:none; }
  .doc-type-name { font-size:13px; }

  /* 课时网格2列换行 */
  .hours-grid { flex-wrap:wrap; gap:8px; }
  .hours-card {
    flex:1 1 calc(50% - 8px);
    padding:12px 6px;
  }
  .hours-card.auto { flex:1 1 100%; }
  .hours-num { font-size:18px; }
  .hours-card.auto .hours-num { font-size:14px; }

  /* 试卷上传区域 */
  .paper-upload-area { padding:16px; min-height:100px; }
  .upload-icon { font-size:28px; }
  .upload-placeholder p { font-size:13px; }
  .upload-previews { grid-template-columns:repeat(3,1fr); gap:8px; }
  .btn-remove-file { padding:3px 6px; font-size:10px; }

  /* 生成按钮底部固定 */
  .btn-generate {
    position:fixed;
    bottom:calc(56px + env(safe-area-inset-bottom,0px));
    left:0; right:0;
    border-radius:0;
    z-index:100;
    margin:0;
    padding:14px 16px;
    padding-bottom:calc(14px + env(safe-area-inset-bottom,0px));
    box-shadow:0 -2px 12px rgba(0,0,0,0.1);
  }

  /* 姓名建议下拉 */
  .name-suggestions { max-height:200px; }

  /* 预览工具栏紧凑 */
  .preview-toolbar { padding:8px 12px; }
  .toolbar-actions { gap:4px; }
  .btn-toolbar { padding:6px 10px; font-size:12px; }
  .preview-content {
    padding:12px;
    -webkit-overflow-scrolling:touch;
  }

  /* 文档渲染紧凑 */
  .document-render {
    padding:20px 14px;
    font-size:14px;
    line-height:1.8;
  }
  .document-render h1 { font-size:20px; padding-bottom:14px; margin-bottom:16px; }
  .document-render h2 { font-size:17px; margin:24px 0 10px; }
  .document-render h3 { font-size:15px; margin:18px 0 6px; }
  .document-render h4 { font-size:14px; }
  .document-render p { margin-bottom:8px; }

  /* 表格横向滚动 */
  .document-render table {
    font-size:12px;
    display:block;
    overflow-x:auto;
    -webkit-overflow-scrolling:touch;
  }
  .document-render th, .document-render td { padding:6px 8px; }
  .document-render blockquote { padding:12px 14px; font-size:13px; margin-top:24px; }

  /* 空状态 */
  .empty-state { padding:20px; }
  .empty-state h2 { font-size:18px; }
  .empty-state p { font-size:13px; margin-bottom:16px; }
  .empty-logo { width:56px; height:56px; margin-bottom:12px; }
  .feature-list { flex-direction:column; gap:6px; margin-bottom:16px; }
  .empty-hint { font-size:12px; }

  /* 水印缩小 */
  .preview-panel::before { background-size:350px auto; }

  /* 设置弹窗 */
  .modal { width:92%; }
  .modal-header { padding:16px; }
  .modal-header h2 { font-size:16px; }
  .modal-body { padding:16px; }
  .modal-footer { padding:12px 16px; }

  /* 生成中指示器 */
  .generating-indicator { padding:12px 16px; }

  /* ===== 移动端底部Tab栏 ===== */
  .mobile-tab-bar {
    display:flex;
    position:fixed;
    bottom:0; left:0; right:0;
    height:calc(56px + env(safe-area-inset-bottom,0px));
    padding-bottom:env(safe-area-inset-bottom,0px);
    background:var(--bg-card);
    border-top:1px solid var(--border);
    z-index:200;
    box-shadow:0 -2px 8px rgba(0,0,0,0.06);
  }
  .mobile-tab {
    flex:1;
    display:flex;
    flex-direction:column;
    align-items:center;
    justify-content:center;
    gap:2px;
    background:none;
    border:none;
    cursor:pointer;
    color:var(--text-tertiary);
    font-family:inherit;
    transition:var(--transition);
    -webkit-tap-highlight-color:transparent;
  }
  .mobile-tab.active { color:var(--primary); font-weight:600; }
  .tab-icon { font-size:20px; }
  .tab-label { font-size:11px; }
}

/* 打印样式 */
@media print {
  .top-header, .input-panel, .preview-toolbar, .generating-indicator, .mobile-tab-bar { display:none !important; }
  .preview-panel { overflow:visible; }
  .preview-content { padding:0; overflow:visible; }
  .document-render { box-shadow:none; border:none; }
}