/* ===== 全局 ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
    --primary: #1a73e8;
    --primary-dark: #1557b0;
    --primary-light: #e8f0fe;
    --bg: #f5f7fa;
    --bg-card: #ffffff;
    --text: #1a1a1a;
    --text-muted: #666;
    --text-light: #999;
    --border: #e0e0e0;
    --success: #34a853;
    --warn: #f9ab00;
    --danger: #ea4335;
    --sidebar-w: 240px;
    --radius: 12px;
    --shadow: 0 2px 8px rgba(0,0,0,0.08);
    --shadow-lg: 0 4px 20px rgba(0,0,0,0.10);
}
body { font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif; background: var(--bg); color: var(--text); }
a { color: inherit; text-decoration: none; }

/* ===== 登录页 ===== */
.login-body { display: flex; align-items: center; justify-content: center; min-height: 100vh; background: linear-gradient(135deg, #1a73e8 0%, #0d47a1 100%); }
.login-container { width: 100%; max-width: 400px; padding: 20px; }
.login-card { background: #fff; border-radius: var(--radius); padding: 40px 32px; box-shadow: 0 20px 60px rgba(0,0,0,0.15); }
.login-logo { text-align: center; margin-bottom: 32px; }
.logo-icon { font-size: 48px; line-height: 1; }
.logo-icon.small { font-size: 24px; }
.login-logo h1 { font-size: 22px; margin-top: 12px; color: var(--text); }
.login-logo p { color: var(--text-muted); font-size: 14px; margin-top: 4px; }
.login-form .form-group { margin-bottom: 16px; }
.login-form label { display: block; font-size: 14px; color: var(--text-muted); margin-bottom: 6px; }
.login-form input { width: 100%; padding: 12px 16px; border: 1px solid var(--border); border-radius: 8px; font-size: 15px; transition: border-color 0.2s; }
.login-form input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-light); }
.login-divider { text-align: center; margin: 24px 0; position: relative; }
.login-divider::before { content: ''; position: absolute; left: 0; right: 0; top: 50%; height: 1px; background: var(--border); }
.login-divider span { background: #fff; padding: 0 12px; color: var(--text-light); font-size: 13px; position: relative; }
.login-footer { text-align: center; margin-top: 24px; color: var(--text-light); font-size: 12px; }

/* ===== 按钮 ===== */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; padding: 10px 20px; border: none; border-radius: 8px; font-size: 14px; cursor: pointer; text-decoration: none; transition: all 0.2s; background: #f0f0f0; color: var(--text); }
.btn:hover { background: #e0e0e0; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-success { background: var(--success); color: #fff; }
.btn-warn { background: var(--warn); color: #fff; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-full { width: 100%; }
.btn-sm { padding: 6px 12px; font-size: 13px; }
.btn-outline { background: transparent; color: var(--primary); border: 1.5px solid var(--primary); font-size: 15px; padding: 11px; }
.btn-outline:hover { background: var(--primary); color: #fff; }

/* ===== 提示 ===== */
.alert { padding: 12px 16px; border-radius: 8px; margin-bottom: 16px; font-size: 14px; }
.alert-error { background: #fce8e6; color: var(--danger); }
.alert-success { background: #e6f4ea; color: var(--success); }
.badge { display: inline-block; padding: 2px 8px; border-radius: 4px; font-size: 12px; }
.badge-success { background: #e6f4ea; color: var(--success); }
.badge-warn { background: #fef7e0; color: var(--warn); }
.badge-danger { background: #fce8e6; color: var(--danger); }
.badge-admin { background: #e8f0fe; color: var(--primary); }
.badge-coach { background: #f0f0f0; color: var(--text-muted); }
.badge-muted { background: #f0f0f0; color: var(--text-light); }

/* ===== 整体布局 ===== */
.app-layout { display: flex; height: 100vh; overflow: hidden; }
.sidebar { width: var(--sidebar-w); background: #fff; border-right: 1px solid var(--border); display: flex; flex-direction: column; flex-shrink: 0; transition: transform 0.3s; position: relative; z-index: 200; }
.sidebar.collapsed { transform: translateX(-100%); }
.sidebar-header { display: flex; align-items: center; gap: 8px; padding: 16px 20px; border-bottom: 1px solid var(--border); }
.sidebar-title { font-size: 16px; font-weight: 600; }
.sidebar-user { display: flex; align-items: center; gap: 10px; padding: 12px 20px; border-bottom: 1px solid var(--border); }
.user-avatar { width: 36px; height: 36px; border-radius: 50%; background: var(--primary); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 16px; font-weight: 600; }
.user-name { font-size: 14px; font-weight: 500; }
.user-role { font-size: 12px; color: var(--text-light); }
.sidebar-section { flex: 1; overflow-y: auto; padding: 8px 0; }
.sidebar-label { display: flex; justify-content: space-between; align-items: center; padding: 8px 20px; font-size: 13px; color: var(--text-muted); cursor: pointer; }
.toggle-icon { font-size: 10px; transition: transform 0.2s; }
.module-tree { max-height: none; }
.module-item { margin-bottom: 2px; }
.module-header { display: flex; align-items: center; gap: 6px; padding: 8px 20px; cursor: pointer; transition: background 0.15s; }
.module-header:hover { background: var(--bg); }
.module-tag { display: inline-block; padding: 1px 6px; border-radius: 4px; background: var(--primary-light); color: var(--primary); font-size: 11px; font-weight: 600; min-width: 28px; text-align: center; }
.module-name { font-size: 13px; flex: 1; }
.section-count { font-size: 11px; color: var(--text-light); }
.section-list { padding-left: 20px; }
.section-item { padding: 6px 12px; font-size: 12px; color: var(--text-muted); cursor: pointer; border-left: 2px solid transparent; transition: all 0.15s; }
.section-item:hover { color: var(--primary); border-left-color: var(--primary); background: var(--primary-light); }
.sidebar-footer { padding: 12px 20px; border-top: 1px solid var(--border); display: flex; flex-direction: column; gap: 4px; }
.sidebar-link { font-size: 13px; color: var(--text-muted); text-decoration: none; padding: 8px 12px; border-radius: 6px; transition: background 0.15s; }
.sidebar-link:hover { background: var(--bg); }

/* ===== 主区域 ===== */
.main-area { flex: 1; display: flex; flex-direction: column; overflow: hidden; position: relative; }

/* ===== 搜索引擎首页 ===== */
.search-home { flex: 1; display: flex; align-items: center; justify-content: center; background: var(--bg); overflow-y: auto; }
.search-home-inner { text-align: center; padding: 40px 20px; max-width: 680px; width: 100%; }

.search-logo { margin-bottom: 36px; }
.logo-icon-big { font-size: 64px; display: block; line-height: 1; margin-bottom: 12px; }
.search-title { font-size: 32px; font-weight: 700; color: var(--text); margin-bottom: 8px; letter-spacing: 2px; }
.search-subtitle { font-size: 15px; color: var(--text-muted); }

/* 大搜索框 */
.search-box-large { max-width: 680px; margin: 0 auto; }
.search-input-wrapper { display: flex; align-items: center; gap: 0; background: #fff; border: 1px solid var(--border); border-radius: 24px; padding: 0; transition: box-shadow 0.2s, border-color 0.2s; box-shadow: var(--shadow-lg); }
.search-input-wrapper:focus-within { border-color: var(--primary); box-shadow: 0 0 0 4px var(--primary-light), var(--shadow-lg); }
.search-icon { margin-left: 18px; color: var(--text-light); flex-shrink: 0; }
.search-input { flex: 1; border: none; outline: none; padding: 16px 14px; font-size: 16px; background: transparent; font-family: inherit; }
.search-input::placeholder { color: var(--text-light); }
.search-btn { background: var(--primary); color: #fff; border: none; border-radius: 24px; padding: 12px 28px; font-size: 15px; font-weight: 500; cursor: pointer; transition: background 0.2s; margin: 4px; white-space: nowrap; }
.search-btn:hover { background: var(--primary-dark); }
.search-btn:active { transform: scale(0.97); }

/* 建议问题 */
.search-suggestions { margin-top: 32px; }
.suggestions-label { font-size: 13px; color: var(--text-light); display: block; margin-bottom: 12px; }
.suggestion-chips { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }
.suggestion-chip { padding: 8px 18px; background: #fff; border: 1px solid var(--border); border-radius: 20px; font-size: 13px; cursor: pointer; transition: all 0.15s; color: var(--text-muted); }
.suggestion-chip:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-light); transform: translateY(-1px); }

/* 模式提示 */
.search-mode-hint { margin-top: 40px; display: flex; align-items: center; justify-content: center; gap: 8px; }
.mode-badge { background: #fef7e0; color: var(--warn); padding: 3px 10px; border-radius: 12px; font-size: 12px; font-weight: 500; }
.mode-text { font-size: 12px; color: var(--text-light); }

/* ===== 搜索结果页 ===== */
.search-results-page { background: var(--bg); }

/* 顶部搜索栏 */
.search-bar-top { display: flex; align-items: center; gap: 12px; padding: 10px 20px; background: #fff; border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 10; }
.menu-btn { display: none; background: none; border: none; font-size: 20px; cursor: pointer; color: var(--text-muted); }
.search-logo-small { display: flex; align-items: center; gap: 6px; flex-shrink: 0; cursor: pointer; }
.logo-icon-small { font-size: 24px; }
.logo-text-small { font-size: 15px; font-weight: 600; color: var(--text); white-space: nowrap; }

.search-box-small { flex: 1; max-width: 600px; }
.search-input-wrapper-small { display: flex; align-items: center; background: var(--bg); border: 1px solid var(--border); border-radius: 22px; transition: box-shadow 0.2s, border-color 0.2s; }
.search-input-wrapper-small:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-light); background: #fff; }
.search-icon-sm { margin-left: 14px; color: var(--text-light); flex-shrink: 0; }
.search-input-small { flex: 1; border: none; outline: none; padding: 10px 12px; font-size: 14px; background: transparent; font-family: inherit; }
.search-input-small::placeholder { color: var(--text-light); }
.search-btn-small { background: var(--primary); color: #fff; border: none; border-radius: 22px; padding: 8px 20px; font-size: 13px; cursor: pointer; margin: 3px; transition: background 0.2s; }
.search-btn-small:hover { background: var(--primary-dark); }

.top-actions { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.back-home-btn { font-size: 13px; color: var(--primary); padding: 6px 14px; border-radius: 6px; transition: background 0.15s; }
.back-home-btn:hover { background: var(--primary-light); }
.top-admin-link { font-size: 18px; color: var(--text-muted); transition: color 0.15s; }
.top-admin-link:hover { color: var(--primary); }
.top-logout-link { font-size: 13px; color: var(--text-light); transition: color 0.15s; }
.top-logout-link:hover { color: var(--danger); }

/* 结果容器 */
.results-container { flex: 1; overflow-y: auto; padding: 20px 24px 40px; max-width: 800px; margin: 0 auto; width: 100%; }

/* 用户问题 */
.result-item { margin-bottom: 24px; }
.result-user { display: flex; gap: 12px; align-items: flex-start; }
.result-user-icon { width: 32px; height: 32px; border-radius: 50%; background: var(--primary); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 14px; font-weight: 600; flex-shrink: 0; }
.result-user-text { background: var(--primary); color: #fff; padding: 10px 16px; border-radius: 4px 16px 16px 16px; font-size: 14px; line-height: 1.6; display: inline-block; }

/* AI回答 */
.result-ai { display: flex; gap: 12px; align-items: flex-start; }
.result-ai-icon { width: 32px; height: 32px; border-radius: 50%; background: #fff; border: 1px solid var(--border); display: flex; align-items: center; justify-content: center; font-size: 18px; flex-shrink: 0; }
.result-ai-body { flex: 1; }
.result-ai-name { font-size: 12px; color: var(--text-muted); margin-bottom: 4px; font-weight: 500; }
.result-ai-content { background: #fff; border-radius: 4px 16px 16px 16px; padding: 16px 20px; font-size: 14px; line-height: 1.8; word-break: break-word; box-shadow: var(--shadow); }

/* 来源 */
.result-sources { margin-top: 12px; padding: 10px 14px; background: #f8f9fa; border-radius: 8px; border-left: 3px solid var(--primary); }
.result-sources-label { font-size: 12px; color: var(--text-muted); margin-bottom: 4px; }
.result-source-item { font-size: 12px; color: var(--primary); margin-bottom: 2px; }

/* 超纲提示 */
.result-out-of-scope { margin-top: 10px; padding: 8px 12px; background: #fef7e0; border-radius: 8px; font-size: 12px; color: var(--warn); }
.result-info-only { background: #e8f0fe; color: var(--primary); }

/* ===== Markdown渲染样式 ===== */
.markdown-body { font-size: 14px; line-height: 1.8; color: var(--text); }
.markdown-body h2.md-h2 { font-size: 17px; font-weight: 700; margin: 16px 0 8px; color: var(--text); }
.markdown-body h3.md-h3 { font-size: 15px; font-weight: 600; margin: 14px 0 6px; color: var(--text); }
.markdown-body h4.md-h4 { font-size: 14px; font-weight: 600; margin: 12px 0 4px; color: var(--text); }
.markdown-body hr.md-hr { border: none; border-top: 1px solid var(--border); margin: 12px 0; }
.markdown-body blockquote.md-quote { border-left: 3px solid var(--primary); padding: 8px 14px; margin: 10px 0; background: #f8f9fa; border-radius: 0 6px 6px 0; color: var(--text-muted); font-size: 13px; }
.markdown-body ul.md-ul, .markdown-body ol.md-ol { padding-left: 22px; margin: 8px 0; }
.markdown-body li.md-li, .markdown-body li.md-li-ol { margin-bottom: 4px; }
.markdown-body strong { font-weight: 600; color: var(--text); }
.markdown-body em { font-style: italic; }
.markdown-body code.md-code { background: #f0f0f0; padding: 2px 6px; border-radius: 3px; font-size: 13px; font-family: "SF Mono", "Fira Code", monospace; }
.markdown-body pre { background: #f6f8fa; padding: 12px 14px; border-radius: 8px; overflow-x: auto; margin: 10px 0; }
.markdown-body pre code { font-size: 13px; font-family: "SF Mono", "Fira Code", monospace; color: var(--text); }

/* Markdown表格 */
.markdown-body table.md-table { width: 100%; border-collapse: collapse; margin: 10px 0; font-size: 13px; }
.markdown-body table.md-table th { background: var(--bg); padding: 8px 12px; border: 1px solid var(--border); text-align: left; font-weight: 600; white-space: nowrap; }
.markdown-body table.md-table td { padding: 8px 12px; border: 1px solid var(--border); }
.markdown-body table.md-table tr:nth-child(even) td { background: #fafbfc; }
.markdown-body table.md-table tr:hover td { background: var(--primary-light); }

/* 加载动画 */
.typing-indicator { display: flex; gap: 4px; padding: 4px 0; }
.typing-indicator span { width: 8px; height: 8px; border-radius: 50%; background: var(--text-light); animation: typing 1.4s infinite; }
.typing-indicator span:nth-child(2) { animation-delay: 0.2s; }
.typing-indicator span:nth-child(3) { animation-delay: 0.4s; }
@keyframes typing { 0%,60%,100% { opacity: 0.3; } 30% { opacity: 1; } }

/* 底部搜索区 */
.bottom-search-area { padding: 16px 24px 24px; background: var(--bg); border-top: 1px solid var(--border); }
.bottom-search-area .search-input-wrapper { box-shadow: var(--shadow); }

/* ===== 弹窗 ===== */
.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.4); z-index: 1000; display: flex; align-items: center; justify-content: center; padding: 20px; }
.modal-content { background: #fff; border-radius: var(--radius); max-width: 700px; width: 100%; max-height: 80vh; display: flex; flex-direction: column; }
.modal-header { display: flex; justify-content: space-between; align-items: center; padding: 16px 24px; border-bottom: 1px solid var(--border); }
.modal-header h3 { font-size: 16px; }
.modal-close { background: none; border: none; font-size: 18px; cursor: pointer; color: var(--text-muted); }
.modal-body { padding: 24px; overflow-y: auto; font-size: 14px; line-height: 1.8; word-break: break-word; }
.modal-body table.md-table { width: 100%; border-collapse: collapse; margin: 10px 0; font-size: 13px; }
.modal-body table.md-table th { background: var(--bg); padding: 8px 12px; border: 1px solid var(--border); text-align: left; font-weight: 600; }
.modal-body table.md-table td { padding: 8px 12px; border: 1px solid var(--border); }
.modal-body strong { font-weight: 600; }
.modal-body ul, .modal-body ol { padding-left: 22px; margin: 8px 0; }
.modal-body li { margin-bottom: 4px; }
.modal-body blockquote { border-left: 3px solid var(--primary); padding: 8px 14px; margin: 10px 0; background: #f8f9fa; border-radius: 0 6px 6px 0; color: var(--text-muted); font-size: 13px; }
.modal-body h2, .modal-body h3, .modal-body h4 { margin: 14px 0 6px; }
.modal-body hr { border: none; border-top: 1px solid var(--border); margin: 12px 0; }

/* ===== 后台管理 ===== */
.admin-layout { min-height: 100vh; }
.admin-header { display: flex; align-items: center; gap: 16px; padding: 12px 24px; background: #fff; border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 10; }
.admin-title { display: flex; align-items: center; gap: 8px; }
.admin-title h2 { font-size: 18px; }
.admin-nav { display: flex; gap: 4px; flex: 1; }
.admin-tab { padding: 8px 16px; border-radius: 8px; font-size: 14px; color: var(--text-muted); text-decoration: none; cursor: pointer; transition: all 0.15s; }
.admin-tab:hover { background: var(--bg); }
.admin-tab.active { background: var(--primary-light); color: var(--primary); font-weight: 500; }
.admin-actions { display: flex; gap: 8px; }
.admin-tab-content { display: none; padding: 24px; max-width: 1200px; margin: 0 auto; }
.admin-tab-content.active { display: block; }

.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; margin-bottom: 24px; }
.stat-card { background: #fff; border-radius: var(--radius); padding: 24px; text-align: center; box-shadow: var(--shadow); }
.stat-warn-card { border: 2px solid var(--warn); }
.stat-icon { font-size: 32px; margin-bottom: 8px; }
.stat-value { font-size: 32px; font-weight: 700; color: var(--text); }
.stat-label { font-size: 13px; color: var(--text-muted); margin-top: 4px; }

.admin-panel { background: #fff; border-radius: var(--radius); padding: 24px; margin-bottom: 16px; box-shadow: var(--shadow); }
.admin-panel h3 { font-size: 16px; margin-bottom: 16px; }
.panel-highlight { border: 2px solid var(--warn); }
.admin-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.admin-table th { text-align: left; padding: 10px 12px; border-bottom: 2px solid var(--border); color: var(--text-muted); font-weight: 500; font-size: 13px; }
.admin-table td { padding: 10px 12px; border-bottom: 1px solid var(--border); }
.admin-table tr:hover td { background: var(--bg); }
.inline-form { display: flex; gap: 8px; flex-wrap: wrap; }
.inline-form input, .inline-form select { padding: 8px 12px; border: 1px solid var(--border); border-radius: 8px; font-size: 14px; }
.inline-form input { flex: 1; min-width: 120px; }

.review-item { border: 1px solid var(--border); border-radius: 8px; padding: 16px; margin-bottom: 12px; }
.review-item.reviewed { opacity: 0.7; }
.review-question { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; }
.review-user { font-weight: 500; font-size: 13px; }
.review-time { font-size: 12px; color: var(--text-light); }
.review-content { font-size: 14px; margin-bottom: 12px; padding: 8px 12px; background: var(--bg); border-radius: 6px; }
.review-actions { display: flex; flex-direction: column; gap: 8px; }
.review-notes { width: 100%; padding: 8px 12px; border: 1px solid var(--border); border-radius: 6px; font-size: 13px; min-height: 40px; resize: vertical; }
.review-btns { display: flex; gap: 8px; }
.review-notes-text { font-size: 12px; color: var(--text-muted); margin-top: 4px; }
.kb-actions { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.empty-state { text-align: center; padding: 40px; color: var(--text-muted); }
.empty-icon { font-size: 40px; margin-bottom: 8px; }
.text-muted { color: var(--text-muted); font-size: 13px; }

/* ===== 用户活动列表 ===== */
.recent-q-list { list-style: none; padding: 0; margin: 0; }
.recent-q-list li { font-size: 12px; color: var(--text-muted); padding: 2px 0; }
.recent-q-list .q-time { color: var(--text-light); font-size: 11px; }

/* ===== 响应式 ===== */
@media (max-width: 768px) {
    .sidebar { position: fixed; left: 0; top: 0; bottom: 0; z-index: 200; transform: translateX(-100%); }
    .sidebar.show { transform: translateX(0); }
    .menu-btn { display: block; }
    .search-home-inner { padding: 20px 16px; }
    .logo-icon-big { font-size: 48px; }
    .search-title { font-size: 24px; }
    .search-subtitle { font-size: 13px; }
    .search-input { font-size: 14px; padding: 12px 10px; }
    .search-btn { padding: 10px 18px; font-size: 14px; }
    .search-bar-top { flex-wrap: wrap; padding: 8px 12px; }
    .search-box-small { order: 3; width: 100%; max-width: none; flex: none; }
    .top-actions { gap: 8px; }
    .back-home-btn { font-size: 12px; padding: 4px 10px; }
    .results-container { padding: 16px 12px 32px; }
    .bottom-search-area { padding: 12px; }
    .admin-header { flex-wrap: wrap; }
    .admin-nav { order: 3; width: 100%; overflow-x: auto; }
    .stats-grid { grid-template-columns: 1fr 1fr; }
    .suggestion-chips { gap: 8px; }
    .suggestion-chip { font-size: 12px; padding: 6px 14px; }
}